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--- old/usr/src/uts/common/fs/nfs/nfs4_vnops.c
+++ new/usr/src/uts/common/fs/nfs/nfs4_vnops.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
24 24 */
25 25
26 26 /*
27 27 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
28 28 * Use is subject to license terms.
29 29 */
30 30
31 31 /*
32 32 * Copyright 1983,1984,1985,1986,1987,1988,1989 AT&T.
33 33 * All Rights Reserved
34 34 */
35 35
36 36 /*
37 37 * Copyright (c) 2014, Joyent, Inc. All rights reserved.
38 38 */
39 39
40 40 #include <sys/param.h>
41 41 #include <sys/types.h>
42 42 #include <sys/systm.h>
43 43 #include <sys/cred.h>
44 44 #include <sys/time.h>
45 45 #include <sys/vnode.h>
46 46 #include <sys/vfs.h>
47 47 #include <sys/vfs_opreg.h>
48 48 #include <sys/file.h>
49 49 #include <sys/filio.h>
50 50 #include <sys/uio.h>
51 51 #include <sys/buf.h>
52 52 #include <sys/mman.h>
53 53 #include <sys/pathname.h>
54 54 #include <sys/dirent.h>
55 55 #include <sys/debug.h>
56 56 #include <sys/vmsystm.h>
57 57 #include <sys/fcntl.h>
58 58 #include <sys/flock.h>
59 59 #include <sys/swap.h>
60 60 #include <sys/errno.h>
61 61 #include <sys/strsubr.h>
62 62 #include <sys/sysmacros.h>
63 63 #include <sys/kmem.h>
64 64 #include <sys/cmn_err.h>
65 65 #include <sys/pathconf.h>
66 66 #include <sys/utsname.h>
67 67 #include <sys/dnlc.h>
68 68 #include <sys/acl.h>
69 69 #include <sys/systeminfo.h>
70 70 #include <sys/policy.h>
71 71 #include <sys/sdt.h>
72 72 #include <sys/list.h>
73 73 #include <sys/stat.h>
74 74 #include <sys/zone.h>
75 75
76 76 #include <rpc/types.h>
77 77 #include <rpc/auth.h>
78 78 #include <rpc/clnt.h>
79 79
80 80 #include <nfs/nfs.h>
81 81 #include <nfs/nfs_clnt.h>
82 82 #include <nfs/nfs_acl.h>
83 83 #include <nfs/lm.h>
84 84 #include <nfs/nfs4.h>
85 85 #include <nfs/nfs4_kprot.h>
86 86 #include <nfs/rnode4.h>
87 87 #include <nfs/nfs4_clnt.h>
88 88
89 89 #include <vm/hat.h>
90 90 #include <vm/as.h>
91 91 #include <vm/page.h>
92 92 #include <vm/pvn.h>
93 93 #include <vm/seg.h>
94 94 #include <vm/seg_map.h>
95 95 #include <vm/seg_kpm.h>
96 96 #include <vm/seg_vn.h>
97 97
98 98 #include <fs/fs_subr.h>
99 99
100 100 #include <sys/ddi.h>
101 101 #include <sys/int_fmtio.h>
102 102 #include <sys/fs/autofs.h>
103 103
104 104 typedef struct {
105 105 nfs4_ga_res_t *di_garp;
106 106 cred_t *di_cred;
107 107 hrtime_t di_time_call;
108 108 } dirattr_info_t;
109 109
110 110 typedef enum nfs4_acl_op {
111 111 NFS4_ACL_GET,
112 112 NFS4_ACL_SET
113 113 } nfs4_acl_op_t;
114 114
115 115 static struct lm_sysid *nfs4_find_sysid(mntinfo4_t *mi);
116 116
117 117 static void nfs4_update_dircaches(change_info4 *, vnode_t *, vnode_t *,
118 118 char *, dirattr_info_t *);
119 119
120 120 static void nfs4close_otw(rnode4_t *, cred_t *, nfs4_open_owner_t *,
121 121 nfs4_open_stream_t *, int *, int *, nfs4_close_type_t,
122 122 nfs4_error_t *, int *);
123 123 static int nfs4_rdwrlbn(vnode_t *, page_t *, u_offset_t, size_t, int,
124 124 cred_t *);
125 125 static int nfs4write(vnode_t *, caddr_t, u_offset_t, int, cred_t *,
126 126 stable_how4 *);
127 127 static int nfs4read(vnode_t *, caddr_t, offset_t, int, size_t *,
128 128 cred_t *, bool_t, struct uio *);
129 129 static int nfs4setattr(vnode_t *, struct vattr *, int, cred_t *,
130 130 vsecattr_t *);
131 131 static int nfs4openattr(vnode_t *, vnode_t **, int, cred_t *);
132 132 static int nfs4lookup(vnode_t *, char *, vnode_t **, cred_t *, int);
133 133 static int nfs4lookup_xattr(vnode_t *, char *, vnode_t **, int, cred_t *);
134 134 static int nfs4lookupvalidate_otw(vnode_t *, char *, vnode_t **, cred_t *);
135 135 static int nfs4lookupnew_otw(vnode_t *, char *, vnode_t **, cred_t *);
136 136 static int nfs4mknod(vnode_t *, char *, struct vattr *, enum vcexcl,
137 137 int, vnode_t **, cred_t *);
138 138 static int nfs4open_otw(vnode_t *, char *, struct vattr *, vnode_t **,
139 139 cred_t *, int, int, enum createmode4, int);
140 140 static int nfs4rename(vnode_t *, char *, vnode_t *, char *, cred_t *,
141 141 caller_context_t *);
142 142 static int nfs4rename_persistent_fh(vnode_t *, char *, vnode_t *,
143 143 vnode_t *, char *, cred_t *, nfsstat4 *);
144 144 static int nfs4rename_volatile_fh(vnode_t *, char *, vnode_t *,
145 145 vnode_t *, char *, cred_t *, nfsstat4 *);
146 146 static int do_nfs4readdir(vnode_t *, rddir4_cache *, cred_t *);
147 147 static void nfs4readdir(vnode_t *, rddir4_cache *, cred_t *);
148 148 static int nfs4_bio(struct buf *, stable_how4 *, cred_t *, bool_t);
149 149 static int nfs4_getapage(vnode_t *, u_offset_t, size_t, uint_t *,
150 150 page_t *[], size_t, struct seg *, caddr_t,
151 151 enum seg_rw, cred_t *);
152 152 static void nfs4_readahead(vnode_t *, u_offset_t, caddr_t, struct seg *,
153 153 cred_t *);
154 154 static int nfs4_sync_putapage(vnode_t *, page_t *, u_offset_t, size_t,
155 155 int, cred_t *);
156 156 static int nfs4_sync_pageio(vnode_t *, page_t *, u_offset_t, size_t,
157 157 int, cred_t *);
158 158 static int nfs4_commit(vnode_t *, offset4, count4, cred_t *);
159 159 static void nfs4_set_mod(vnode_t *);
160 160 static void nfs4_get_commit(vnode_t *);
161 161 static void nfs4_get_commit_range(vnode_t *, u_offset_t, size_t);
162 162 static int nfs4_putpage_commit(vnode_t *, offset_t, size_t, cred_t *);
163 163 static int nfs4_commit_vp(vnode_t *, u_offset_t, size_t, cred_t *, int);
164 164 static int nfs4_sync_commit(vnode_t *, page_t *, offset3, count3,
165 165 cred_t *);
166 166 static void do_nfs4_async_commit(vnode_t *, page_t *, offset3, count3,
167 167 cred_t *);
168 168 static int nfs4_update_attrcache(nfsstat4, nfs4_ga_res_t *,
169 169 hrtime_t, vnode_t *, cred_t *);
170 170 static int nfs4_open_non_reg_file(vnode_t **, int, cred_t *);
171 171 static int nfs4_safelock(vnode_t *, const struct flock64 *, cred_t *);
172 172 static void nfs4_register_lock_locally(vnode_t *, struct flock64 *, int,
173 173 u_offset_t);
174 174 static int nfs4_lockrelease(vnode_t *, int, offset_t, cred_t *);
175 175 static int nfs4_block_and_wait(clock_t *, rnode4_t *);
176 176 static cred_t *state_to_cred(nfs4_open_stream_t *);
177 177 static void denied_to_flk(LOCK4denied *, flock64_t *, LOCKT4args *);
178 178 static pid_t lo_to_pid(lock_owner4 *);
179 179 static void nfs4_reinstitute_local_lock_state(vnode_t *, flock64_t *,
180 180 cred_t *, nfs4_lock_owner_t *);
181 181 static void push_reinstate(vnode_t *, int, flock64_t *, cred_t *,
182 182 nfs4_lock_owner_t *);
183 183 static int open_and_get_osp(vnode_t *, cred_t *, nfs4_open_stream_t **);
184 184 static void nfs4_delmap_callback(struct as *, void *, uint_t);
185 185 static void nfs4_free_delmapcall(nfs4_delmapcall_t *);
186 186 static nfs4_delmapcall_t *nfs4_init_delmapcall();
187 187 static int nfs4_find_and_delete_delmapcall(rnode4_t *, int *);
188 188 static int nfs4_is_acl_mask_valid(uint_t, nfs4_acl_op_t);
189 189 static int nfs4_create_getsecattr_return(vsecattr_t *, vsecattr_t *,
190 190 uid_t, gid_t, int);
191 191
192 192 /*
193 193 * Routines that implement the setting of v4 args for the misc. ops
194 194 */
195 195 static void nfs4args_lock_free(nfs_argop4 *);
196 196 static void nfs4args_lockt_free(nfs_argop4 *);
197 197 static void nfs4args_setattr(nfs_argop4 *, vattr_t *, vsecattr_t *,
198 198 int, rnode4_t *, cred_t *, bitmap4, int *,
199 199 nfs4_stateid_types_t *);
200 200 static void nfs4args_setattr_free(nfs_argop4 *);
201 201 static int nfs4args_verify(nfs_argop4 *, vattr_t *, enum nfs_opnum4,
202 202 bitmap4);
203 203 static void nfs4args_verify_free(nfs_argop4 *);
204 204 static void nfs4args_write(nfs_argop4 *, stable_how4, rnode4_t *, cred_t *,
205 205 WRITE4args **, nfs4_stateid_types_t *);
206 206
207 207 /*
208 208 * These are the vnode ops functions that implement the vnode interface to
209 209 * the networked file system. See more comments below at nfs4_vnodeops.
210 210 */
211 211 static int nfs4_open(vnode_t **, int, cred_t *, caller_context_t *);
212 212 static int nfs4_close(vnode_t *, int, int, offset_t, cred_t *,
213 213 caller_context_t *);
214 214 static int nfs4_read(vnode_t *, struct uio *, int, cred_t *,
215 215 caller_context_t *);
216 216 static int nfs4_write(vnode_t *, struct uio *, int, cred_t *,
217 217 caller_context_t *);
218 218 static int nfs4_ioctl(vnode_t *, int, intptr_t, int, cred_t *, int *,
219 219 caller_context_t *);
220 220 static int nfs4_setattr(vnode_t *, struct vattr *, int, cred_t *,
221 221 caller_context_t *);
222 222 static int nfs4_access(vnode_t *, int, int, cred_t *, caller_context_t *);
223 223 static int nfs4_readlink(vnode_t *, struct uio *, cred_t *,
224 224 caller_context_t *);
225 225 static int nfs4_fsync(vnode_t *, int, cred_t *, caller_context_t *);
226 226 static int nfs4_create(vnode_t *, char *, struct vattr *, enum vcexcl,
227 227 int, vnode_t **, cred_t *, int, caller_context_t *,
228 228 vsecattr_t *);
229 229 static int nfs4_remove(vnode_t *, char *, cred_t *, caller_context_t *,
230 230 int);
231 231 static int nfs4_link(vnode_t *, vnode_t *, char *, cred_t *,
232 232 caller_context_t *, int);
233 233 static int nfs4_rename(vnode_t *, char *, vnode_t *, char *, cred_t *,
234 234 caller_context_t *, int);
235 235 static int nfs4_mkdir(vnode_t *, char *, struct vattr *, vnode_t **,
236 236 cred_t *, caller_context_t *, int, vsecattr_t *);
237 237 static int nfs4_rmdir(vnode_t *, char *, vnode_t *, cred_t *,
238 238 caller_context_t *, int);
239 239 static int nfs4_symlink(vnode_t *, char *, struct vattr *, char *,
240 240 cred_t *, caller_context_t *, int);
241 241 static int nfs4_readdir(vnode_t *, struct uio *, cred_t *, int *,
242 242 caller_context_t *, int);
243 243 static int nfs4_seek(vnode_t *, offset_t, offset_t *, caller_context_t *);
244 244 static int nfs4_getpage(vnode_t *, offset_t, size_t, uint_t *,
245 245 page_t *[], size_t, struct seg *, caddr_t,
246 246 enum seg_rw, cred_t *, caller_context_t *);
247 247 static int nfs4_putpage(vnode_t *, offset_t, size_t, int, cred_t *,
248 248 caller_context_t *);
249 249 static int nfs4_map(vnode_t *, offset_t, struct as *, caddr_t *, size_t,
250 250 uchar_t, uchar_t, uint_t, cred_t *, caller_context_t *);
251 251 static int nfs4_addmap(vnode_t *, offset_t, struct as *, caddr_t, size_t,
252 252 uchar_t, uchar_t, uint_t, cred_t *, caller_context_t *);
253 253 static int nfs4_cmp(vnode_t *, vnode_t *, caller_context_t *);
254 254 static int nfs4_frlock(vnode_t *, int, struct flock64 *, int, offset_t,
255 255 struct flk_callback *, cred_t *, caller_context_t *);
256 256 static int nfs4_space(vnode_t *, int, struct flock64 *, int, offset_t,
257 257 cred_t *, caller_context_t *);
258 258 static int nfs4_delmap(vnode_t *, offset_t, struct as *, caddr_t, size_t,
259 259 uint_t, uint_t, uint_t, cred_t *, caller_context_t *);
260 260 static int nfs4_pageio(vnode_t *, page_t *, u_offset_t, size_t, int,
261 261 cred_t *, caller_context_t *);
262 262 static void nfs4_dispose(vnode_t *, page_t *, int, int, cred_t *,
263 263 caller_context_t *);
264 264 static int nfs4_setsecattr(vnode_t *, vsecattr_t *, int, cred_t *,
265 265 caller_context_t *);
266 266 /*
267 267 * These vnode ops are required to be called from outside this source file,
268 268 * e.g. by ephemeral mount stub vnode ops, and so may not be declared
269 269 * as static.
270 270 */
271 271 int nfs4_getattr(vnode_t *, struct vattr *, int, cred_t *,
272 272 caller_context_t *);
273 273 void nfs4_inactive(vnode_t *, cred_t *, caller_context_t *);
274 274 int nfs4_lookup(vnode_t *, char *, vnode_t **,
275 275 struct pathname *, int, vnode_t *, cred_t *,
276 276 caller_context_t *, int *, pathname_t *);
277 277 int nfs4_fid(vnode_t *, fid_t *, caller_context_t *);
278 278 int nfs4_rwlock(vnode_t *, int, caller_context_t *);
279 279 void nfs4_rwunlock(vnode_t *, int, caller_context_t *);
280 280 int nfs4_realvp(vnode_t *, vnode_t **, caller_context_t *);
281 281 int nfs4_pathconf(vnode_t *, int, ulong_t *, cred_t *,
282 282 caller_context_t *);
283 283 int nfs4_getsecattr(vnode_t *, vsecattr_t *, int, cred_t *,
284 284 caller_context_t *);
285 285 int nfs4_shrlock(vnode_t *, int, struct shrlock *, int, cred_t *,
286 286 caller_context_t *);
287 287
288 288 /*
289 289 * Used for nfs4_commit_vp() to indicate if we should
290 290 * wait on pending writes.
291 291 */
292 292 #define NFS4_WRITE_NOWAIT 0
293 293 #define NFS4_WRITE_WAIT 1
294 294
295 295 #define NFS4_BASE_WAIT_TIME 1 /* 1 second */
296 296
297 297 /*
298 298 * Error flags used to pass information about certain special errors
299 299 * which need to be handled specially.
300 300 */
301 301 #define NFS_EOF -98
302 302 #define NFS_VERF_MISMATCH -97
303 303
304 304 /*
305 305 * Flags used to differentiate between which operation drove the
306 306 * potential CLOSE OTW. (see nfs4_close_otw_if_necessary)
307 307 */
308 308 #define NFS4_CLOSE_OP 0x1
309 309 #define NFS4_DELMAP_OP 0x2
310 310 #define NFS4_INACTIVE_OP 0x3
311 311
312 312 #define ISVDEV(t) ((t == VBLK) || (t == VCHR) || (t == VFIFO))
313 313
314 314 /* ALIGN64 aligns the given buffer and adjust buffer size to 64 bit */
315 315 #define ALIGN64(x, ptr, sz) \
316 316 x = ((uintptr_t)(ptr)) & (sizeof (uint64_t) - 1); \
317 317 if (x) { \
318 318 x = sizeof (uint64_t) - (x); \
319 319 sz -= (x); \
320 320 ptr += (x); \
321 321 }
322 322
323 323 #ifdef DEBUG
324 324 int nfs4_client_attr_debug = 0;
325 325 int nfs4_client_state_debug = 0;
326 326 int nfs4_client_shadow_debug = 0;
327 327 int nfs4_client_lock_debug = 0;
328 328 int nfs4_seqid_sync = 0;
329 329 int nfs4_client_map_debug = 0;
330 330 static int nfs4_pageio_debug = 0;
331 331 int nfs4_client_inactive_debug = 0;
332 332 int nfs4_client_recov_debug = 0;
333 333 int nfs4_client_failover_debug = 0;
334 334 int nfs4_client_call_debug = 0;
335 335 int nfs4_client_lookup_debug = 0;
336 336 int nfs4_client_zone_debug = 0;
337 337 int nfs4_lost_rqst_debug = 0;
338 338 int nfs4_rdattrerr_debug = 0;
339 339 int nfs4_open_stream_debug = 0;
340 340
341 341 int nfs4read_error_inject;
342 342
343 343 static int nfs4_create_misses = 0;
344 344
345 345 static int nfs4_readdir_cache_shorts = 0;
346 346 static int nfs4_readdir_readahead = 0;
347 347
348 348 static int nfs4_bio_do_stop = 0;
349 349
350 350 static int nfs4_lostpage = 0; /* number of times we lost original page */
351 351
352 352 int nfs4_mmap_debug = 0;
353 353
354 354 static int nfs4_pathconf_cache_hits = 0;
355 355 static int nfs4_pathconf_cache_misses = 0;
356 356
357 357 int nfs4close_all_cnt;
358 358 int nfs4close_one_debug = 0;
359 359 int nfs4close_notw_debug = 0;
360 360
361 361 int denied_to_flk_debug = 0;
362 362 void *lockt_denied_debug;
363 363
364 364 #endif
365 365
366 366 /*
367 367 * How long to wait before trying again if OPEN_CONFIRM gets ETIMEDOUT
368 368 * or NFS4ERR_RESOURCE.
369 369 */
370 370 static int confirm_retry_sec = 30;
371 371
372 372 static int nfs4_lookup_neg_cache = 1;
373 373
374 374 /*
375 375 * number of pages to read ahead
376 376 * optimized for 100 base-T.
377 377 */
378 378 static int nfs4_nra = 4;
379 379
380 380 static int nfs4_do_symlink_cache = 1;
381 381
382 382 static int nfs4_pathconf_disable_cache = 0;
383 383
384 384 /*
385 385 * These are the vnode ops routines which implement the vnode interface to
386 386 * the networked file system. These routines just take their parameters,
387 387 * make them look networkish by putting the right info into interface structs,
388 388 * and then calling the appropriate remote routine(s) to do the work.
389 389 *
390 390 * Note on directory name lookup cacheing: If we detect a stale fhandle,
391 391 * we purge the directory cache relative to that vnode. This way, the
392 392 * user won't get burned by the cache repeatedly. See <nfs/rnode4.h> for
393 393 * more details on rnode locking.
394 394 */
395 395
396 396 struct vnodeops *nfs4_vnodeops;
397 397
398 398 const fs_operation_def_t nfs4_vnodeops_template[] = {
399 399 VOPNAME_OPEN, { .vop_open = nfs4_open },
400 400 VOPNAME_CLOSE, { .vop_close = nfs4_close },
401 401 VOPNAME_READ, { .vop_read = nfs4_read },
402 402 VOPNAME_WRITE, { .vop_write = nfs4_write },
403 403 VOPNAME_IOCTL, { .vop_ioctl = nfs4_ioctl },
404 404 VOPNAME_GETATTR, { .vop_getattr = nfs4_getattr },
405 405 VOPNAME_SETATTR, { .vop_setattr = nfs4_setattr },
406 406 VOPNAME_ACCESS, { .vop_access = nfs4_access },
407 407 VOPNAME_LOOKUP, { .vop_lookup = nfs4_lookup },
408 408 VOPNAME_CREATE, { .vop_create = nfs4_create },
409 409 VOPNAME_REMOVE, { .vop_remove = nfs4_remove },
410 410 VOPNAME_LINK, { .vop_link = nfs4_link },
411 411 VOPNAME_RENAME, { .vop_rename = nfs4_rename },
412 412 VOPNAME_MKDIR, { .vop_mkdir = nfs4_mkdir },
413 413 VOPNAME_RMDIR, { .vop_rmdir = nfs4_rmdir },
414 414 VOPNAME_READDIR, { .vop_readdir = nfs4_readdir },
415 415 VOPNAME_SYMLINK, { .vop_symlink = nfs4_symlink },
416 416 VOPNAME_READLINK, { .vop_readlink = nfs4_readlink },
417 417 VOPNAME_FSYNC, { .vop_fsync = nfs4_fsync },
418 418 VOPNAME_INACTIVE, { .vop_inactive = nfs4_inactive },
419 419 VOPNAME_FID, { .vop_fid = nfs4_fid },
420 420 VOPNAME_RWLOCK, { .vop_rwlock = nfs4_rwlock },
421 421 VOPNAME_RWUNLOCK, { .vop_rwunlock = nfs4_rwunlock },
422 422 VOPNAME_SEEK, { .vop_seek = nfs4_seek },
423 423 VOPNAME_FRLOCK, { .vop_frlock = nfs4_frlock },
424 424 VOPNAME_SPACE, { .vop_space = nfs4_space },
425 425 VOPNAME_REALVP, { .vop_realvp = nfs4_realvp },
426 426 VOPNAME_GETPAGE, { .vop_getpage = nfs4_getpage },
427 427 VOPNAME_PUTPAGE, { .vop_putpage = nfs4_putpage },
428 428 VOPNAME_MAP, { .vop_map = nfs4_map },
429 429 VOPNAME_ADDMAP, { .vop_addmap = nfs4_addmap },
430 430 VOPNAME_DELMAP, { .vop_delmap = nfs4_delmap },
431 431 /* no separate nfs4_dump */
432 432 VOPNAME_DUMP, { .vop_dump = nfs_dump },
433 433 VOPNAME_PATHCONF, { .vop_pathconf = nfs4_pathconf },
434 434 VOPNAME_PAGEIO, { .vop_pageio = nfs4_pageio },
435 435 VOPNAME_DISPOSE, { .vop_dispose = nfs4_dispose },
436 436 VOPNAME_SETSECATTR, { .vop_setsecattr = nfs4_setsecattr },
437 437 VOPNAME_GETSECATTR, { .vop_getsecattr = nfs4_getsecattr },
438 438 VOPNAME_SHRLOCK, { .vop_shrlock = nfs4_shrlock },
439 439 VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support },
440 440 NULL, NULL
441 441 };
442 442
443 443 /*
444 444 * The following are subroutines and definitions to set args or get res
445 445 * for the different nfsv4 ops
446 446 */
447 447
448 448 void
449 449 nfs4args_lookup_free(nfs_argop4 *argop, int arglen)
450 450 {
451 451 int i;
452 452
453 453 for (i = 0; i < arglen; i++) {
454 454 if (argop[i].argop == OP_LOOKUP) {
455 455 kmem_free(
456 456 argop[i].nfs_argop4_u.oplookup.
457 457 objname.utf8string_val,
458 458 argop[i].nfs_argop4_u.oplookup.
459 459 objname.utf8string_len);
460 460 }
461 461 }
462 462 }
463 463
464 464 static void
465 465 nfs4args_lock_free(nfs_argop4 *argop)
466 466 {
467 467 locker4 *locker = &argop->nfs_argop4_u.oplock.locker;
468 468
469 469 if (locker->new_lock_owner == TRUE) {
470 470 open_to_lock_owner4 *open_owner;
471 471
472 472 open_owner = &locker->locker4_u.open_owner;
473 473 if (open_owner->lock_owner.owner_val != NULL) {
474 474 kmem_free(open_owner->lock_owner.owner_val,
475 475 open_owner->lock_owner.owner_len);
476 476 }
477 477 }
478 478 }
479 479
480 480 static void
481 481 nfs4args_lockt_free(nfs_argop4 *argop)
482 482 {
483 483 lock_owner4 *lowner = &argop->nfs_argop4_u.oplockt.owner;
484 484
485 485 if (lowner->owner_val != NULL) {
486 486 kmem_free(lowner->owner_val, lowner->owner_len);
487 487 }
488 488 }
489 489
490 490 static void
491 491 nfs4args_setattr(nfs_argop4 *argop, vattr_t *vap, vsecattr_t *vsap, int flags,
492 492 rnode4_t *rp, cred_t *cr, bitmap4 supp, int *error,
493 493 nfs4_stateid_types_t *sid_types)
494 494 {
495 495 fattr4 *attr = &argop->nfs_argop4_u.opsetattr.obj_attributes;
496 496 mntinfo4_t *mi;
497 497
498 498 argop->argop = OP_SETATTR;
499 499 /*
500 500 * The stateid is set to 0 if client is not modifying the size
501 501 * and otherwise to whatever nfs4_get_stateid() returns.
502 502 *
503 503 * XXX Note: nfs4_get_stateid() returns 0 if no lockowner and/or no
504 504 * state struct could be found for the process/file pair. We may
505 505 * want to change this in the future (by OPENing the file). See
506 506 * bug # 4474852.
507 507 */
508 508 if (vap->va_mask & AT_SIZE) {
509 509
510 510 ASSERT(rp != NULL);
511 511 mi = VTOMI4(RTOV4(rp));
512 512
513 513 argop->nfs_argop4_u.opsetattr.stateid =
514 514 nfs4_get_stateid(cr, rp, curproc->p_pidp->pid_id, mi,
515 515 OP_SETATTR, sid_types, FALSE);
516 516 } else {
517 517 bzero(&argop->nfs_argop4_u.opsetattr.stateid,
518 518 sizeof (stateid4));
519 519 }
520 520
521 521 *error = vattr_to_fattr4(vap, vsap, attr, flags, OP_SETATTR, supp);
522 522 if (*error)
523 523 bzero(attr, sizeof (*attr));
524 524 }
525 525
526 526 static void
527 527 nfs4args_setattr_free(nfs_argop4 *argop)
528 528 {
529 529 nfs4_fattr4_free(&argop->nfs_argop4_u.opsetattr.obj_attributes);
530 530 }
531 531
532 532 static int
533 533 nfs4args_verify(nfs_argop4 *argop, vattr_t *vap, enum nfs_opnum4 op,
534 534 bitmap4 supp)
535 535 {
536 536 fattr4 *attr;
537 537 int error = 0;
538 538
539 539 argop->argop = op;
540 540 switch (op) {
541 541 case OP_VERIFY:
542 542 attr = &argop->nfs_argop4_u.opverify.obj_attributes;
543 543 break;
544 544 case OP_NVERIFY:
545 545 attr = &argop->nfs_argop4_u.opnverify.obj_attributes;
546 546 break;
547 547 default:
548 548 return (EINVAL);
549 549 }
550 550 if (!error)
551 551 error = vattr_to_fattr4(vap, NULL, attr, 0, op, supp);
552 552 if (error)
553 553 bzero(attr, sizeof (*attr));
554 554 return (error);
555 555 }
556 556
557 557 static void
558 558 nfs4args_verify_free(nfs_argop4 *argop)
559 559 {
560 560 switch (argop->argop) {
561 561 case OP_VERIFY:
562 562 nfs4_fattr4_free(&argop->nfs_argop4_u.opverify.obj_attributes);
563 563 break;
564 564 case OP_NVERIFY:
565 565 nfs4_fattr4_free(&argop->nfs_argop4_u.opnverify.obj_attributes);
566 566 break;
567 567 default:
568 568 break;
569 569 }
570 570 }
571 571
572 572 static void
573 573 nfs4args_write(nfs_argop4 *argop, stable_how4 stable, rnode4_t *rp, cred_t *cr,
574 574 WRITE4args **wargs_pp, nfs4_stateid_types_t *sid_tp)
575 575 {
576 576 WRITE4args *wargs = &argop->nfs_argop4_u.opwrite;
577 577 mntinfo4_t *mi = VTOMI4(RTOV4(rp));
578 578
579 579 argop->argop = OP_WRITE;
580 580 wargs->stable = stable;
581 581 wargs->stateid = nfs4_get_w_stateid(cr, rp, curproc->p_pidp->pid_id,
582 582 mi, OP_WRITE, sid_tp);
583 583 wargs->mblk = NULL;
584 584 *wargs_pp = wargs;
585 585 }
586 586
587 587 void
588 588 nfs4args_copen_free(OPEN4cargs *open_args)
589 589 {
590 590 if (open_args->owner.owner_val) {
591 591 kmem_free(open_args->owner.owner_val,
592 592 open_args->owner.owner_len);
593 593 }
594 594 if ((open_args->opentype == OPEN4_CREATE) &&
595 595 (open_args->mode != EXCLUSIVE4)) {
596 596 nfs4_fattr4_free(&open_args->createhow4_u.createattrs);
597 597 }
598 598 }
599 599
600 600 /*
601 601 * XXX: This is referenced in modstubs.s
602 602 */
603 603 struct vnodeops *
604 604 nfs4_getvnodeops(void)
605 605 {
606 606 return (nfs4_vnodeops);
607 607 }
608 608
609 609 /*
610 610 * The OPEN operation opens a regular file.
611 611 */
612 612 /*ARGSUSED3*/
613 613 static int
614 614 nfs4_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct)
615 615 {
616 616 vnode_t *dvp = NULL;
617 617 rnode4_t *rp, *drp;
618 618 int error;
619 619 int just_been_created;
620 620 char fn[MAXNAMELEN];
621 621
622 622 NFS4_DEBUG(nfs4_client_state_debug, (CE_NOTE, "nfs4_open: "));
623 623 if (nfs_zone() != VTOMI4(*vpp)->mi_zone)
624 624 return (EIO);
625 625 rp = VTOR4(*vpp);
626 626
627 627 /*
628 628 * Check to see if opening something besides a regular file;
629 629 * if so skip the OTW call
630 630 */
631 631 if ((*vpp)->v_type != VREG) {
632 632 error = nfs4_open_non_reg_file(vpp, flag, cr);
633 633 return (error);
634 634 }
635 635
636 636 /*
637 637 * XXX - would like a check right here to know if the file is
638 638 * executable or not, so as to skip OTW
639 639 */
640 640
641 641 if ((error = vtodv(*vpp, &dvp, cr, TRUE)) != 0)
642 642 return (error);
643 643
644 644 drp = VTOR4(dvp);
645 645 if (nfs_rw_enter_sig(&drp->r_rwlock, RW_READER, INTR4(dvp)))
646 646 return (EINTR);
647 647
648 648 if ((error = vtoname(*vpp, fn, MAXNAMELEN)) != 0) {
649 649 nfs_rw_exit(&drp->r_rwlock);
650 650 return (error);
651 651 }
652 652
653 653 /*
654 654 * See if this file has just been CREATEd.
655 655 * If so, clear the flag and update the dnlc, which was previously
656 656 * skipped in nfs4_create.
657 657 * XXX need better serilization on this.
658 658 * XXX move this into the nf4open_otw call, after we have
659 659 * XXX acquired the open owner seqid sync.
660 660 */
661 661 mutex_enter(&rp->r_statev4_lock);
662 662 if (rp->created_v4) {
663 663 rp->created_v4 = 0;
664 664 mutex_exit(&rp->r_statev4_lock);
665 665
666 666 dnlc_update(dvp, fn, *vpp);
667 667 /* This is needed so we don't bump the open ref count */
668 668 just_been_created = 1;
669 669 } else {
670 670 mutex_exit(&rp->r_statev4_lock);
671 671 just_been_created = 0;
672 672 }
673 673
674 674 /*
675 675 * If caller specified O_TRUNC/FTRUNC, then be sure to set
676 676 * FWRITE (to drive successful setattr(size=0) after open)
677 677 */
678 678 if (flag & FTRUNC)
679 679 flag |= FWRITE;
680 680
681 681 error = nfs4open_otw(dvp, fn, NULL, vpp, cr, 0, flag, 0,
682 682 just_been_created);
683 683
684 684 if (!error && !((*vpp)->v_flag & VROOT))
685 685 dnlc_update(dvp, fn, *vpp);
686 686
687 687 nfs_rw_exit(&drp->r_rwlock);
688 688
689 689 /* release the hold from vtodv */
690 690 VN_RELE(dvp);
691 691
692 692 /* exchange the shadow for the master vnode, if needed */
693 693
694 694 if (error == 0 && IS_SHADOW(*vpp, rp))
695 695 sv_exchange(vpp);
696 696
697 697 return (error);
698 698 }
699 699
700 700 /*
701 701 * See if there's a "lost open" request to be saved and recovered.
702 702 */
703 703 static void
704 704 nfs4open_save_lost_rqst(int error, nfs4_lost_rqst_t *lost_rqstp,
705 705 nfs4_open_owner_t *oop, cred_t *cr, vnode_t *vp,
706 706 vnode_t *dvp, OPEN4cargs *open_args)
707 707 {
708 708 vfs_t *vfsp;
709 709 char *srccfp;
710 710
711 711 vfsp = (dvp ? dvp->v_vfsp : vp->v_vfsp);
712 712
713 713 if (error != ETIMEDOUT && error != EINTR &&
714 714 !NFS4_FRC_UNMT_ERR(error, vfsp)) {
715 715 lost_rqstp->lr_op = 0;
716 716 return;
717 717 }
718 718
719 719 NFS4_DEBUG(nfs4_lost_rqst_debug, (CE_NOTE,
720 720 "nfs4open_save_lost_rqst: error %d", error));
721 721
722 722 lost_rqstp->lr_op = OP_OPEN;
723 723
724 724 /*
725 725 * The vp (if it is not NULL) and dvp are held and rele'd via
726 726 * the recovery code. See nfs4_save_lost_rqst.
727 727 */
728 728 lost_rqstp->lr_vp = vp;
729 729 lost_rqstp->lr_dvp = dvp;
730 730 lost_rqstp->lr_oop = oop;
731 731 lost_rqstp->lr_osp = NULL;
732 732 lost_rqstp->lr_lop = NULL;
733 733 lost_rqstp->lr_cr = cr;
734 734 lost_rqstp->lr_flk = NULL;
735 735 lost_rqstp->lr_oacc = open_args->share_access;
736 736 lost_rqstp->lr_odeny = open_args->share_deny;
737 737 lost_rqstp->lr_oclaim = open_args->claim;
738 738 if (open_args->claim == CLAIM_DELEGATE_CUR) {
739 739 lost_rqstp->lr_ostateid =
740 740 open_args->open_claim4_u.delegate_cur_info.delegate_stateid;
741 741 srccfp = open_args->open_claim4_u.delegate_cur_info.cfile;
742 742 } else {
743 743 srccfp = open_args->open_claim4_u.cfile;
744 744 }
745 745 lost_rqstp->lr_ofile.utf8string_len = 0;
746 746 lost_rqstp->lr_ofile.utf8string_val = NULL;
747 747 (void) str_to_utf8(srccfp, &lost_rqstp->lr_ofile);
748 748 lost_rqstp->lr_putfirst = FALSE;
749 749 }
750 750
751 751 struct nfs4_excl_time {
752 752 uint32 seconds;
753 753 uint32 nseconds;
754 754 };
755 755
756 756 /*
757 757 * The OPEN operation creates and/or opens a regular file
758 758 *
759 759 * ARGSUSED
760 760 */
761 761 static int
762 762 nfs4open_otw(vnode_t *dvp, char *file_name, struct vattr *in_va,
763 763 vnode_t **vpp, cred_t *cr, int create_flag, int open_flag,
764 764 enum createmode4 createmode, int file_just_been_created)
765 765 {
766 766 rnode4_t *rp;
767 767 rnode4_t *drp = VTOR4(dvp);
768 768 vnode_t *vp = NULL;
769 769 vnode_t *vpi = *vpp;
770 770 bool_t needrecov = FALSE;
771 771
772 772 int doqueue = 1;
773 773
774 774 COMPOUND4args_clnt args;
775 775 COMPOUND4res_clnt res;
776 776 nfs_argop4 *argop;
777 777 nfs_resop4 *resop;
778 778 int argoplist_size;
779 779 int idx_open, idx_fattr;
780 780
781 781 GETFH4res *gf_res = NULL;
782 782 OPEN4res *op_res = NULL;
783 783 nfs4_ga_res_t *garp;
784 784 fattr4 *attr = NULL;
785 785 struct nfs4_excl_time verf;
786 786 bool_t did_excl_setup = FALSE;
787 787 int created_osp;
788 788
789 789 OPEN4cargs *open_args;
790 790 nfs4_open_owner_t *oop = NULL;
791 791 nfs4_open_stream_t *osp = NULL;
792 792 seqid4 seqid = 0;
793 793 bool_t retry_open = FALSE;
794 794 nfs4_recov_state_t recov_state;
795 795 nfs4_lost_rqst_t lost_rqst;
796 796 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
797 797 hrtime_t t;
798 798 int acc = 0;
799 799 cred_t *cred_otw = NULL; /* cred used to do the RPC call */
800 800 cred_t *ncr = NULL;
801 801
802 802 nfs4_sharedfh_t *otw_sfh;
803 803 nfs4_sharedfh_t *orig_sfh;
804 804 int fh_differs = 0;
805 805 int numops, setgid_flag;
806 806 int num_bseqid_retry = NFS4_NUM_RETRY_BAD_SEQID + 1;
807 807
808 808 /*
809 809 * Make sure we properly deal with setting the right gid on
810 810 * a newly created file to reflect the parent's setgid bit
811 811 */
812 812 setgid_flag = 0;
813 813 if (create_flag && in_va) {
814 814
815 815 /*
816 816 * If there is grpid mount flag used or
817 817 * the parent's directory has the setgid bit set
818 818 * _and_ the client was able to get a valid mapping
819 819 * for the parent dir's owner_group, we want to
820 820 * append NVERIFY(owner_group == dva.va_gid) and
821 821 * SETATTR to the CREATE compound.
822 822 */
823 823 mutex_enter(&drp->r_statelock);
824 824 if ((VTOMI4(dvp)->mi_flags & MI4_GRPID ||
825 825 drp->r_attr.va_mode & VSGID) &&
826 826 drp->r_attr.va_gid != GID_NOBODY) {
827 827 in_va->va_mask |= AT_GID;
828 828 in_va->va_gid = drp->r_attr.va_gid;
829 829 setgid_flag = 1;
830 830 }
831 831 mutex_exit(&drp->r_statelock);
832 832 }
833 833
834 834 /*
835 835 * Normal/non-create compound:
836 836 * PUTFH(dfh) + OPEN(create) + GETFH + GETATTR(new)
837 837 *
838 838 * Open(create) compound no setgid:
839 839 * PUTFH(dfh) + SAVEFH + OPEN(create) + GETFH + GETATTR(new) +
840 840 * RESTOREFH + GETATTR
841 841 *
842 842 * Open(create) setgid:
843 843 * PUTFH(dfh) + OPEN(create) + GETFH + GETATTR(new) +
844 844 * SAVEFH + PUTFH(dfh) + GETATTR(dvp) + RESTOREFH +
845 845 * NVERIFY(grp) + SETATTR
846 846 */
847 847 if (setgid_flag) {
848 848 numops = 10;
849 849 idx_open = 1;
850 850 idx_fattr = 3;
851 851 } else if (create_flag) {
852 852 numops = 7;
853 853 idx_open = 2;
854 854 idx_fattr = 4;
855 855 } else {
856 856 numops = 4;
857 857 idx_open = 1;
858 858 idx_fattr = 3;
859 859 }
860 860
861 861 args.array_len = numops;
862 862 argoplist_size = numops * sizeof (nfs_argop4);
863 863 argop = kmem_alloc(argoplist_size, KM_SLEEP);
864 864
865 865 NFS4_DEBUG(nfs4_client_state_debug, (CE_NOTE, "nfs4open_otw: "
866 866 "open %s open flag 0x%x cred %p", file_name, open_flag,
867 867 (void *)cr));
868 868
869 869 ASSERT(nfs_zone() == VTOMI4(dvp)->mi_zone);
870 870 if (create_flag) {
871 871 /*
872 872 * We are to create a file. Initialize the passed in vnode
873 873 * pointer.
874 874 */
875 875 vpi = NULL;
876 876 } else {
877 877 /*
878 878 * Check to see if the client owns a read delegation and is
879 879 * trying to open for write. If so, then return the delegation
880 880 * to avoid the server doing a cb_recall and returning DELAY.
881 881 * NB - we don't use the statev4_lock here because we'd have
882 882 * to drop the lock anyway and the result would be stale.
883 883 */
884 884 if ((open_flag & FWRITE) &&
885 885 VTOR4(vpi)->r_deleg_type == OPEN_DELEGATE_READ)
886 886 (void) nfs4delegreturn(VTOR4(vpi), NFS4_DR_REOPEN);
887 887
888 888 /*
889 889 * If the file has a delegation, then do an access check up
890 890 * front. This avoids having to an access check later after
891 891 * we've already done start_op, which could deadlock.
892 892 */
893 893 if (VTOR4(vpi)->r_deleg_type != OPEN_DELEGATE_NONE) {
894 894 if (open_flag & FREAD &&
895 895 nfs4_access(vpi, VREAD, 0, cr, NULL) == 0)
896 896 acc |= VREAD;
897 897 if (open_flag & FWRITE &&
898 898 nfs4_access(vpi, VWRITE, 0, cr, NULL) == 0)
899 899 acc |= VWRITE;
900 900 }
901 901 }
902 902
903 903 drp = VTOR4(dvp);
904 904
905 905 recov_state.rs_flags = 0;
906 906 recov_state.rs_num_retry_despite_err = 0;
907 907 cred_otw = cr;
908 908
909 909 recov_retry:
910 910 fh_differs = 0;
911 911 nfs4_error_zinit(&e);
912 912
913 913 e.error = nfs4_start_op(VTOMI4(dvp), dvp, vpi, &recov_state);
914 914 if (e.error) {
915 915 if (ncr != NULL)
916 916 crfree(ncr);
917 917 kmem_free(argop, argoplist_size);
918 918 return (e.error);
919 919 }
920 920
921 921 args.ctag = TAG_OPEN;
922 922 args.array_len = numops;
923 923 args.array = argop;
924 924
925 925 /* putfh directory fh */
926 926 argop[0].argop = OP_CPUTFH;
927 927 argop[0].nfs_argop4_u.opcputfh.sfh = drp->r_fh;
928 928
929 929 /* OPEN: either op 1 or op 2 depending upon create/setgid flags */
930 930 argop[idx_open].argop = OP_COPEN;
931 931 open_args = &argop[idx_open].nfs_argop4_u.opcopen;
932 932 open_args->claim = CLAIM_NULL;
933 933
934 934 /* name of file */
935 935 open_args->open_claim4_u.cfile = file_name;
936 936 open_args->owner.owner_len = 0;
937 937 open_args->owner.owner_val = NULL;
938 938
939 939 if (create_flag) {
940 940 /* CREATE a file */
941 941 open_args->opentype = OPEN4_CREATE;
942 942 open_args->mode = createmode;
943 943 if (createmode == EXCLUSIVE4) {
944 944 if (did_excl_setup == FALSE) {
945 945 verf.seconds = zone_get_hostid(NULL);
946 946 if (verf.seconds != 0)
947 947 verf.nseconds = newnum();
948 948 else {
949 949 timestruc_t now;
950 950
951 951 gethrestime(&now);
952 952 verf.seconds = now.tv_sec;
953 953 verf.nseconds = now.tv_nsec;
954 954 }
955 955 /*
956 956 * Since the server will use this value for the
957 957 * mtime, make sure that it can't overflow. Zero
958 958 * out the MSB. The actual value does not matter
959 959 * here, only its uniqeness.
960 960 */
961 961 verf.seconds &= INT32_MAX;
962 962 did_excl_setup = TRUE;
963 963 }
964 964
965 965 /* Now copy over verifier to OPEN4args. */
966 966 open_args->createhow4_u.createverf = *(uint64_t *)&verf;
967 967 } else {
968 968 int v_error;
969 969 bitmap4 supp_attrs;
970 970 servinfo4_t *svp;
971 971
972 972 attr = &open_args->createhow4_u.createattrs;
973 973
974 974 svp = drp->r_server;
975 975 (void) nfs_rw_enter_sig(&svp->sv_lock, RW_READER, 0);
976 976 supp_attrs = svp->sv_supp_attrs;
977 977 nfs_rw_exit(&svp->sv_lock);
978 978
979 979 /* GUARDED4 or UNCHECKED4 */
980 980 v_error = vattr_to_fattr4(in_va, NULL, attr, 0, OP_OPEN,
981 981 supp_attrs);
982 982 if (v_error) {
983 983 bzero(attr, sizeof (*attr));
984 984 nfs4args_copen_free(open_args);
985 985 nfs4_end_op(VTOMI4(dvp), dvp, vpi,
986 986 &recov_state, FALSE);
987 987 if (ncr != NULL)
988 988 crfree(ncr);
989 989 kmem_free(argop, argoplist_size);
990 990 return (v_error);
991 991 }
992 992 }
993 993 } else {
994 994 /* NO CREATE */
995 995 open_args->opentype = OPEN4_NOCREATE;
996 996 }
997 997
998 998 if (recov_state.rs_sp != NULL) {
999 999 mutex_enter(&recov_state.rs_sp->s_lock);
1000 1000 open_args->owner.clientid = recov_state.rs_sp->clientid;
1001 1001 mutex_exit(&recov_state.rs_sp->s_lock);
1002 1002 } else {
1003 1003 /* XXX should we just fail here? */
1004 1004 open_args->owner.clientid = 0;
1005 1005 }
1006 1006
1007 1007 /*
1008 1008 * This increments oop's ref count or creates a temporary 'just_created'
1009 1009 * open owner that will become valid when this OPEN/OPEN_CONFIRM call
1010 1010 * completes.
1011 1011 */
1012 1012 mutex_enter(&VTOMI4(dvp)->mi_lock);
1013 1013
1014 1014 /* See if a permanent or just created open owner exists */
1015 1015 oop = find_open_owner_nolock(cr, NFS4_JUST_CREATED, VTOMI4(dvp));
1016 1016 if (!oop) {
1017 1017 /*
1018 1018 * This open owner does not exist so create a temporary
1019 1019 * just created one.
1020 1020 */
1021 1021 oop = create_open_owner(cr, VTOMI4(dvp));
1022 1022 ASSERT(oop != NULL);
1023 1023 }
1024 1024 mutex_exit(&VTOMI4(dvp)->mi_lock);
1025 1025
1026 1026 /* this length never changes, do alloc before seqid sync */
1027 1027 open_args->owner.owner_len = sizeof (oop->oo_name);
1028 1028 open_args->owner.owner_val =
1029 1029 kmem_alloc(open_args->owner.owner_len, KM_SLEEP);
1030 1030
1031 1031 e.error = nfs4_start_open_seqid_sync(oop, VTOMI4(dvp));
1032 1032 if (e.error == EAGAIN) {
1033 1033 open_owner_rele(oop);
1034 1034 nfs4args_copen_free(open_args);
1035 1035 nfs4_end_op(VTOMI4(dvp), dvp, vpi, &recov_state, TRUE);
1036 1036 if (ncr != NULL) {
1037 1037 crfree(ncr);
1038 1038 ncr = NULL;
1039 1039 }
1040 1040 goto recov_retry;
1041 1041 }
1042 1042
1043 1043 /* Check to see if we need to do the OTW call */
1044 1044 if (!create_flag) {
1045 1045 if (!nfs4_is_otw_open_necessary(oop, open_flag, vpi,
1046 1046 file_just_been_created, &e.error, acc, &recov_state)) {
1047 1047
1048 1048 /*
1049 1049 * The OTW open is not necessary. Either
1050 1050 * the open can succeed without it (eg.
1051 1051 * delegation, error == 0) or the open
1052 1052 * must fail due to an access failure
1053 1053 * (error != 0). In either case, tidy
1054 1054 * up and return.
1055 1055 */
1056 1056
1057 1057 nfs4_end_open_seqid_sync(oop);
1058 1058 open_owner_rele(oop);
1059 1059 nfs4args_copen_free(open_args);
1060 1060 nfs4_end_op(VTOMI4(dvp), dvp, vpi, &recov_state, FALSE);
1061 1061 if (ncr != NULL)
1062 1062 crfree(ncr);
1063 1063 kmem_free(argop, argoplist_size);
1064 1064 return (e.error);
1065 1065 }
1066 1066 }
1067 1067
1068 1068 bcopy(&oop->oo_name, open_args->owner.owner_val,
1069 1069 open_args->owner.owner_len);
1070 1070
1071 1071 seqid = nfs4_get_open_seqid(oop) + 1;
1072 1072 open_args->seqid = seqid;
1073 1073 open_args->share_access = 0;
1074 1074 if (open_flag & FREAD)
1075 1075 open_args->share_access |= OPEN4_SHARE_ACCESS_READ;
1076 1076 if (open_flag & FWRITE)
1077 1077 open_args->share_access |= OPEN4_SHARE_ACCESS_WRITE;
1078 1078 open_args->share_deny = OPEN4_SHARE_DENY_NONE;
1079 1079
1080 1080
1081 1081
1082 1082 /*
1083 1083 * getfh w/sanity check for idx_open/idx_fattr
1084 1084 */
1085 1085 ASSERT((idx_open + 1) == (idx_fattr - 1));
1086 1086 argop[idx_open + 1].argop = OP_GETFH;
1087 1087
1088 1088 /* getattr */
1089 1089 argop[idx_fattr].argop = OP_GETATTR;
1090 1090 argop[idx_fattr].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
1091 1091 argop[idx_fattr].nfs_argop4_u.opgetattr.mi = VTOMI4(dvp);
1092 1092
1093 1093 if (setgid_flag) {
1094 1094 vattr_t _v;
1095 1095 servinfo4_t *svp;
1096 1096 bitmap4 supp_attrs;
1097 1097
1098 1098 svp = drp->r_server;
1099 1099 (void) nfs_rw_enter_sig(&svp->sv_lock, RW_READER, 0);
1100 1100 supp_attrs = svp->sv_supp_attrs;
1101 1101 nfs_rw_exit(&svp->sv_lock);
1102 1102
1103 1103 /*
1104 1104 * For setgid case, we need to:
1105 1105 * 4:savefh(new) 5:putfh(dir) 6:getattr(dir) 7:restorefh(new)
1106 1106 */
1107 1107 argop[4].argop = OP_SAVEFH;
1108 1108
1109 1109 argop[5].argop = OP_CPUTFH;
1110 1110 argop[5].nfs_argop4_u.opcputfh.sfh = drp->r_fh;
1111 1111
1112 1112 argop[6].argop = OP_GETATTR;
1113 1113 argop[6].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
1114 1114 argop[6].nfs_argop4_u.opgetattr.mi = VTOMI4(dvp);
1115 1115
1116 1116 argop[7].argop = OP_RESTOREFH;
1117 1117
1118 1118 /*
1119 1119 * nverify
1120 1120 */
1121 1121 _v.va_mask = AT_GID;
1122 1122 _v.va_gid = in_va->va_gid;
1123 1123 if (!(e.error = nfs4args_verify(&argop[8], &_v, OP_NVERIFY,
1124 1124 supp_attrs))) {
1125 1125
1126 1126 /*
1127 1127 * setattr
1128 1128 *
1129 1129 * We _know_ we're not messing with AT_SIZE or
1130 1130 * AT_XTIME, so no need for stateid or flags.
1131 1131 * Also we specify NULL rp since we're only
1132 1132 * interested in setting owner_group attributes.
1133 1133 */
1134 1134 nfs4args_setattr(&argop[9], &_v, NULL, 0, NULL, cr,
1135 1135 supp_attrs, &e.error, 0);
1136 1136 if (e.error)
1137 1137 nfs4args_verify_free(&argop[8]);
1138 1138 }
1139 1139
1140 1140 if (e.error) {
1141 1141 /*
1142 1142 * XXX - Revisit the last argument to nfs4_end_op()
1143 1143 * once 5020486 is fixed.
1144 1144 */
1145 1145 nfs4_end_open_seqid_sync(oop);
1146 1146 open_owner_rele(oop);
1147 1147 nfs4args_copen_free(open_args);
1148 1148 nfs4_end_op(VTOMI4(dvp), dvp, vpi, &recov_state, TRUE);
1149 1149 if (ncr != NULL)
1150 1150 crfree(ncr);
1151 1151 kmem_free(argop, argoplist_size);
1152 1152 return (e.error);
1153 1153 }
1154 1154 } else if (create_flag) {
1155 1155 argop[1].argop = OP_SAVEFH;
1156 1156
1157 1157 argop[5].argop = OP_RESTOREFH;
1158 1158
1159 1159 argop[6].argop = OP_GETATTR;
1160 1160 argop[6].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
1161 1161 argop[6].nfs_argop4_u.opgetattr.mi = VTOMI4(dvp);
1162 1162 }
1163 1163
1164 1164 NFS4_DEBUG(nfs4_client_call_debug, (CE_NOTE,
1165 1165 "nfs4open_otw: %s call, nm %s, rp %s",
1166 1166 needrecov ? "recov" : "first", file_name,
1167 1167 rnode4info(VTOR4(dvp))));
1168 1168
1169 1169 t = gethrtime();
1170 1170
1171 1171 rfs4call(VTOMI4(dvp), &args, &res, cred_otw, &doqueue, 0, &e);
1172 1172
1173 1173 if (!e.error && nfs4_need_to_bump_seqid(&res))
1174 1174 nfs4_set_open_seqid(seqid, oop, args.ctag);
1175 1175
1176 1176 needrecov = nfs4_needs_recovery(&e, TRUE, dvp->v_vfsp);
1177 1177
1178 1178 if (e.error || needrecov) {
1179 1179 bool_t abort = FALSE;
1180 1180
1181 1181 if (needrecov) {
1182 1182 nfs4_bseqid_entry_t *bsep = NULL;
1183 1183
1184 1184 nfs4open_save_lost_rqst(e.error, &lost_rqst, oop,
1185 1185 cred_otw, vpi, dvp, open_args);
1186 1186
1187 1187 if (!e.error && res.status == NFS4ERR_BAD_SEQID) {
1188 1188 bsep = nfs4_create_bseqid_entry(oop, NULL,
1189 1189 vpi, 0, args.ctag, open_args->seqid);
1190 1190 num_bseqid_retry--;
1191 1191 }
1192 1192
1193 1193 abort = nfs4_start_recovery(&e, VTOMI4(dvp), dvp, vpi,
1194 1194 NULL, lost_rqst.lr_op == OP_OPEN ?
1195 1195 &lost_rqst : NULL, OP_OPEN, bsep, NULL, NULL);
1196 1196
1197 1197 if (bsep)
1198 1198 kmem_free(bsep, sizeof (*bsep));
1199 1199 /* give up if we keep getting BAD_SEQID */
1200 1200 if (num_bseqid_retry == 0)
1201 1201 abort = TRUE;
1202 1202 if (abort == TRUE && e.error == 0)
1203 1203 e.error = geterrno4(res.status);
1204 1204 }
1205 1205 nfs4_end_open_seqid_sync(oop);
1206 1206 open_owner_rele(oop);
1207 1207 nfs4_end_op(VTOMI4(dvp), dvp, vpi, &recov_state, needrecov);
1208 1208 nfs4args_copen_free(open_args);
1209 1209 if (setgid_flag) {
1210 1210 nfs4args_verify_free(&argop[8]);
1211 1211 nfs4args_setattr_free(&argop[9]);
1212 1212 }
1213 1213 if (!e.error)
1214 1214 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1215 1215 if (ncr != NULL) {
1216 1216 crfree(ncr);
1217 1217 ncr = NULL;
1218 1218 }
1219 1219 if (!needrecov || abort == TRUE || e.error == EINTR ||
1220 1220 NFS4_FRC_UNMT_ERR(e.error, dvp->v_vfsp)) {
1221 1221 kmem_free(argop, argoplist_size);
1222 1222 return (e.error);
1223 1223 }
1224 1224 goto recov_retry;
1225 1225 }
1226 1226
1227 1227 /*
1228 1228 * Will check and update lease after checking the rflag for
1229 1229 * OPEN_CONFIRM in the successful OPEN call.
1230 1230 */
1231 1231 if (res.status != NFS4_OK && res.array_len <= idx_fattr + 1) {
1232 1232
1233 1233 /*
1234 1234 * XXX what if we're crossing mount points from server1:/drp
1235 1235 * to server2:/drp/rp.
1236 1236 */
1237 1237
1238 1238 /* Signal our end of use of the open seqid */
1239 1239 nfs4_end_open_seqid_sync(oop);
1240 1240
1241 1241 /*
1242 1242 * This will destroy the open owner if it was just created,
1243 1243 * and no one else has put a reference on it.
1244 1244 */
1245 1245 open_owner_rele(oop);
1246 1246 if (create_flag && (createmode != EXCLUSIVE4) &&
1247 1247 res.status == NFS4ERR_BADOWNER)
1248 1248 nfs4_log_badowner(VTOMI4(dvp), OP_OPEN);
1249 1249
1250 1250 e.error = geterrno4(res.status);
1251 1251 nfs4args_copen_free(open_args);
1252 1252 if (setgid_flag) {
1253 1253 nfs4args_verify_free(&argop[8]);
1254 1254 nfs4args_setattr_free(&argop[9]);
1255 1255 }
1256 1256 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1257 1257 nfs4_end_op(VTOMI4(dvp), dvp, vpi, &recov_state, needrecov);
1258 1258 /*
1259 1259 * If the reply is NFS4ERR_ACCESS, it may be because
1260 1260 * we are root (no root net access). If the real uid
1261 1261 * is not root, then retry with the real uid instead.
1262 1262 */
1263 1263 if (ncr != NULL) {
1264 1264 crfree(ncr);
1265 1265 ncr = NULL;
1266 1266 }
1267 1267 if (res.status == NFS4ERR_ACCESS &&
1268 1268 (ncr = crnetadjust(cred_otw)) != NULL) {
1269 1269 cred_otw = ncr;
1270 1270 goto recov_retry;
1271 1271 }
1272 1272 kmem_free(argop, argoplist_size);
1273 1273 return (e.error);
1274 1274 }
1275 1275
1276 1276 resop = &res.array[idx_open]; /* open res */
1277 1277 op_res = &resop->nfs_resop4_u.opopen;
1278 1278
1279 1279 #ifdef DEBUG
1280 1280 /*
1281 1281 * verify attrset bitmap
1282 1282 */
1283 1283 if (create_flag &&
1284 1284 (createmode == UNCHECKED4 || createmode == GUARDED4)) {
1285 1285 /* make sure attrset returned is what we asked for */
1286 1286 /* XXX Ignore this 'error' for now */
1287 1287 if (attr->attrmask != op_res->attrset)
1288 1288 /* EMPTY */;
1289 1289 }
1290 1290 #endif
1291 1291
1292 1292 if (op_res->rflags & OPEN4_RESULT_LOCKTYPE_POSIX) {
1293 1293 mutex_enter(&VTOMI4(dvp)->mi_lock);
1294 1294 VTOMI4(dvp)->mi_flags |= MI4_POSIX_LOCK;
1295 1295 mutex_exit(&VTOMI4(dvp)->mi_lock);
1296 1296 }
1297 1297
1298 1298 resop = &res.array[idx_open + 1]; /* getfh res */
1299 1299 gf_res = &resop->nfs_resop4_u.opgetfh;
1300 1300
1301 1301 otw_sfh = sfh4_get(&gf_res->object, VTOMI4(dvp));
1302 1302
1303 1303 /*
1304 1304 * The open stateid has been updated on the server but not
1305 1305 * on the client yet. There is a path: makenfs4node->nfs4_attr_cache->
1306 1306 * flush_pages->VOP_PUTPAGE->...->nfs4write where we will issue an OTW
1307 1307 * WRITE call. That, however, will use the old stateid, so go ahead
1308 1308 * and upate the open stateid now, before any call to makenfs4node.
1309 1309 */
1310 1310 if (vpi) {
1311 1311 nfs4_open_stream_t *tmp_osp;
1312 1312 rnode4_t *tmp_rp = VTOR4(vpi);
1313 1313
1314 1314 tmp_osp = find_open_stream(oop, tmp_rp);
1315 1315 if (tmp_osp) {
1316 1316 tmp_osp->open_stateid = op_res->stateid;
1317 1317 mutex_exit(&tmp_osp->os_sync_lock);
1318 1318 open_stream_rele(tmp_osp, tmp_rp);
1319 1319 }
1320 1320
1321 1321 /*
1322 1322 * We must determine if the file handle given by the otw open
1323 1323 * is the same as the file handle which was passed in with
1324 1324 * *vpp. This case can be reached if the file we are trying
1325 1325 * to open has been removed and another file has been created
1326 1326 * having the same file name. The passed in vnode is released
1327 1327 * later.
1328 1328 */
1329 1329 orig_sfh = VTOR4(vpi)->r_fh;
1330 1330 fh_differs = nfs4cmpfh(&orig_sfh->sfh_fh, &otw_sfh->sfh_fh);
1331 1331 }
1332 1332
1333 1333 garp = &res.array[idx_fattr].nfs_resop4_u.opgetattr.ga_res;
1334 1334
1335 1335 if (create_flag || fh_differs) {
1336 1336 int rnode_err = 0;
1337 1337
1338 1338 vp = makenfs4node(otw_sfh, garp, dvp->v_vfsp, t, cr,
1339 1339 dvp, fn_get(VTOSV(dvp)->sv_name, file_name, otw_sfh));
1340 1340
1341 1341 if (e.error)
1342 1342 PURGE_ATTRCACHE4(vp);
1343 1343 /*
1344 1344 * For the newly created vp case, make sure the rnode
1345 1345 * isn't bad before using it.
1346 1346 */
1347 1347 mutex_enter(&(VTOR4(vp))->r_statelock);
1348 1348 if (VTOR4(vp)->r_flags & R4RECOVERR)
1349 1349 rnode_err = EIO;
1350 1350 mutex_exit(&(VTOR4(vp))->r_statelock);
1351 1351
1352 1352 if (rnode_err) {
1353 1353 nfs4_end_open_seqid_sync(oop);
1354 1354 nfs4args_copen_free(open_args);
1355 1355 if (setgid_flag) {
1356 1356 nfs4args_verify_free(&argop[8]);
1357 1357 nfs4args_setattr_free(&argop[9]);
1358 1358 }
1359 1359 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1360 1360 nfs4_end_op(VTOMI4(dvp), dvp, vpi, &recov_state,
1361 1361 needrecov);
1362 1362 open_owner_rele(oop);
1363 1363 VN_RELE(vp);
1364 1364 if (ncr != NULL)
1365 1365 crfree(ncr);
1366 1366 sfh4_rele(&otw_sfh);
1367 1367 kmem_free(argop, argoplist_size);
1368 1368 return (EIO);
1369 1369 }
1370 1370 } else {
1371 1371 vp = vpi;
1372 1372 }
1373 1373 sfh4_rele(&otw_sfh);
1374 1374
1375 1375 /*
1376 1376 * It seems odd to get a full set of attrs and then not update
1377 1377 * the object's attrcache in the non-create case. Create case uses
1378 1378 * the attrs since makenfs4node checks to see if the attrs need to
1379 1379 * be updated (and then updates them). The non-create case should
1380 1380 * update attrs also.
1381 1381 */
1382 1382 if (! create_flag && ! fh_differs && !e.error) {
1383 1383 nfs4_attr_cache(vp, garp, t, cr, TRUE, NULL);
1384 1384 }
1385 1385
1386 1386 nfs4_error_zinit(&e);
1387 1387 if (op_res->rflags & OPEN4_RESULT_CONFIRM) {
1388 1388 /* This does not do recovery for vp explicitly. */
1389 1389 nfs4open_confirm(vp, &seqid, &op_res->stateid, cred_otw, FALSE,
1390 1390 &retry_open, oop, FALSE, &e, &num_bseqid_retry);
1391 1391
1392 1392 if (e.error || e.stat) {
1393 1393 nfs4_end_open_seqid_sync(oop);
1394 1394 nfs4args_copen_free(open_args);
1395 1395 if (setgid_flag) {
1396 1396 nfs4args_verify_free(&argop[8]);
1397 1397 nfs4args_setattr_free(&argop[9]);
1398 1398 }
1399 1399 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1400 1400 nfs4_end_op(VTOMI4(dvp), dvp, vpi, &recov_state,
1401 1401 needrecov);
1402 1402 open_owner_rele(oop);
1403 1403 if (create_flag || fh_differs) {
1404 1404 /* rele the makenfs4node */
1405 1405 VN_RELE(vp);
1406 1406 }
1407 1407 if (ncr != NULL) {
1408 1408 crfree(ncr);
1409 1409 ncr = NULL;
1410 1410 }
1411 1411 if (retry_open == TRUE) {
1412 1412 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
1413 1413 "nfs4open_otw: retry the open since OPEN "
1414 1414 "CONFIRM failed with error %d stat %d",
1415 1415 e.error, e.stat));
1416 1416 if (create_flag && createmode == GUARDED4) {
1417 1417 NFS4_DEBUG(nfs4_client_recov_debug,
1418 1418 (CE_NOTE, "nfs4open_otw: switch "
1419 1419 "createmode from GUARDED4 to "
1420 1420 "UNCHECKED4"));
1421 1421 createmode = UNCHECKED4;
1422 1422 }
1423 1423 goto recov_retry;
1424 1424 }
1425 1425 if (!e.error) {
1426 1426 if (create_flag && (createmode != EXCLUSIVE4) &&
1427 1427 e.stat == NFS4ERR_BADOWNER)
1428 1428 nfs4_log_badowner(VTOMI4(dvp), OP_OPEN);
1429 1429
1430 1430 e.error = geterrno4(e.stat);
1431 1431 }
1432 1432 kmem_free(argop, argoplist_size);
1433 1433 return (e.error);
1434 1434 }
1435 1435 }
1436 1436
1437 1437 rp = VTOR4(vp);
1438 1438
1439 1439 mutex_enter(&rp->r_statev4_lock);
1440 1440 if (create_flag)
1441 1441 rp->created_v4 = 1;
1442 1442 mutex_exit(&rp->r_statev4_lock);
1443 1443
1444 1444 mutex_enter(&oop->oo_lock);
1445 1445 /* Doesn't matter if 'oo_just_created' already was set as this */
1446 1446 oop->oo_just_created = NFS4_PERM_CREATED;
1447 1447 if (oop->oo_cred_otw)
1448 1448 crfree(oop->oo_cred_otw);
1449 1449 oop->oo_cred_otw = cred_otw;
1450 1450 crhold(oop->oo_cred_otw);
1451 1451 mutex_exit(&oop->oo_lock);
1452 1452
1453 1453 /* returns with 'os_sync_lock' held */
1454 1454 osp = find_or_create_open_stream(oop, rp, &created_osp);
1455 1455 if (!osp) {
1456 1456 NFS4_DEBUG(nfs4_client_state_debug, (CE_NOTE,
1457 1457 "nfs4open_otw: failed to create an open stream"));
1458 1458 NFS4_DEBUG(nfs4_seqid_sync, (CE_NOTE, "nfs4open_otw: "
1459 1459 "signal our end of use of the open seqid"));
1460 1460
1461 1461 nfs4_end_open_seqid_sync(oop);
1462 1462 open_owner_rele(oop);
1463 1463 nfs4args_copen_free(open_args);
1464 1464 if (setgid_flag) {
1465 1465 nfs4args_verify_free(&argop[8]);
1466 1466 nfs4args_setattr_free(&argop[9]);
1467 1467 }
1468 1468 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1469 1469 nfs4_end_op(VTOMI4(dvp), dvp, vpi, &recov_state, needrecov);
1470 1470 if (create_flag || fh_differs)
1471 1471 VN_RELE(vp);
1472 1472 if (ncr != NULL)
1473 1473 crfree(ncr);
1474 1474
1475 1475 kmem_free(argop, argoplist_size);
1476 1476 return (EINVAL);
1477 1477
1478 1478 }
1479 1479
1480 1480 osp->open_stateid = op_res->stateid;
1481 1481
1482 1482 if (open_flag & FREAD)
1483 1483 osp->os_share_acc_read++;
1484 1484 if (open_flag & FWRITE)
1485 1485 osp->os_share_acc_write++;
1486 1486 osp->os_share_deny_none++;
1487 1487
1488 1488 /*
1489 1489 * Need to reset this bitfield for the possible case where we were
1490 1490 * going to OTW CLOSE the file, got a non-recoverable error, and before
1491 1491 * we could retry the CLOSE, OPENed the file again.
1492 1492 */
1493 1493 ASSERT(osp->os_open_owner->oo_seqid_inuse);
1494 1494 osp->os_final_close = 0;
1495 1495 osp->os_force_close = 0;
1496 1496 #ifdef DEBUG
1497 1497 if (osp->os_failed_reopen)
1498 1498 NFS4_DEBUG(nfs4_open_stream_debug, (CE_NOTE, "nfs4open_otw:"
1499 1499 " clearing os_failed_reopen for osp %p, cr %p, rp %s",
1500 1500 (void *)osp, (void *)cr, rnode4info(rp)));
1501 1501 #endif
1502 1502 osp->os_failed_reopen = 0;
1503 1503
1504 1504 mutex_exit(&osp->os_sync_lock);
1505 1505
1506 1506 nfs4_end_open_seqid_sync(oop);
1507 1507
1508 1508 if (created_osp && recov_state.rs_sp != NULL) {
1509 1509 mutex_enter(&recov_state.rs_sp->s_lock);
1510 1510 nfs4_inc_state_ref_count_nolock(recov_state.rs_sp, VTOMI4(dvp));
1511 1511 mutex_exit(&recov_state.rs_sp->s_lock);
1512 1512 }
1513 1513
1514 1514 /* get rid of our reference to find oop */
1515 1515 open_owner_rele(oop);
1516 1516
1517 1517 open_stream_rele(osp, rp);
1518 1518
1519 1519 /* accept delegation, if any */
1520 1520 nfs4_delegation_accept(rp, CLAIM_NULL, op_res, garp, cred_otw);
1521 1521
1522 1522 nfs4_end_op(VTOMI4(dvp), dvp, vpi, &recov_state, needrecov);
1523 1523
1524 1524 if (createmode == EXCLUSIVE4 &&
1525 1525 (in_va->va_mask & ~(AT_GID | AT_SIZE))) {
1526 1526 NFS4_DEBUG(nfs4_client_state_debug, (CE_NOTE, "nfs4open_otw:"
1527 1527 " EXCLUSIVE4: sending a SETATTR"));
1528 1528 /*
1529 1529 * If doing an exclusive create, then generate
1530 1530 * a SETATTR to set the initial attributes.
1531 1531 * Try to set the mtime and the atime to the
1532 1532 * server's current time. It is somewhat
1533 1533 * expected that these fields will be used to
1534 1534 * store the exclusive create cookie. If not,
1535 1535 * server implementors will need to know that
1536 1536 * a SETATTR will follow an exclusive create
1537 1537 * and the cookie should be destroyed if
1538 1538 * appropriate.
1539 1539 *
1540 1540 * The AT_GID and AT_SIZE bits are turned off
1541 1541 * so that the SETATTR request will not attempt
1542 1542 * to process these. The gid will be set
1543 1543 * separately if appropriate. The size is turned
1544 1544 * off because it is assumed that a new file will
1545 1545 * be created empty and if the file wasn't empty,
1546 1546 * then the exclusive create will have failed
1547 1547 * because the file must have existed already.
1548 1548 * Therefore, no truncate operation is needed.
1549 1549 */
1550 1550 in_va->va_mask &= ~(AT_GID | AT_SIZE);
1551 1551 in_va->va_mask |= (AT_MTIME | AT_ATIME);
1552 1552
1553 1553 e.error = nfs4setattr(vp, in_va, 0, cr, NULL);
1554 1554 if (e.error) {
1555 1555 /*
1556 1556 * Couldn't correct the attributes of
1557 1557 * the newly created file and the
1558 1558 * attributes are wrong. Remove the
1559 1559 * file and return an error to the
1560 1560 * application.
1561 1561 */
1562 1562 /* XXX will this take care of client state ? */
1563 1563 NFS4_DEBUG(nfs4_client_state_debug, (CE_NOTE,
1564 1564 "nfs4open_otw: EXCLUSIVE4: error %d on SETATTR:"
1565 1565 " remove file", e.error));
1566 1566 VN_RELE(vp);
1567 1567 (void) nfs4_remove(dvp, file_name, cr, NULL, 0);
1568 1568 /*
1569 1569 * Since we've reled the vnode and removed
1570 1570 * the file we now need to return the error.
1571 1571 * At this point we don't want to update the
1572 1572 * dircaches, call nfs4_waitfor_purge_complete
1573 1573 * or set vpp to vp so we need to skip these
1574 1574 * as well.
1575 1575 */
1576 1576 goto skip_update_dircaches;
1577 1577 }
1578 1578 }
1579 1579
1580 1580 /*
1581 1581 * If we created or found the correct vnode, due to create_flag or
1582 1582 * fh_differs being set, then update directory cache attribute, readdir
1583 1583 * and dnlc caches.
1584 1584 */
1585 1585 if (create_flag || fh_differs) {
1586 1586 dirattr_info_t dinfo, *dinfop;
1587 1587
1588 1588 /*
1589 1589 * Make sure getattr succeeded before using results.
1590 1590 * note: op 7 is getattr(dir) for both flavors of
1591 1591 * open(create).
1592 1592 */
1593 1593 if (create_flag && res.status == NFS4_OK) {
1594 1594 dinfo.di_time_call = t;
1595 1595 dinfo.di_cred = cr;
1596 1596 dinfo.di_garp =
1597 1597 &res.array[6].nfs_resop4_u.opgetattr.ga_res;
1598 1598 dinfop = &dinfo;
1599 1599 } else {
1600 1600 dinfop = NULL;
1601 1601 }
1602 1602
1603 1603 nfs4_update_dircaches(&op_res->cinfo, dvp, vp, file_name,
1604 1604 dinfop);
1605 1605 }
1606 1606
1607 1607 /*
1608 1608 * If the page cache for this file was flushed from actions
1609 1609 * above, it was done asynchronously and if that is true,
1610 1610 * there is a need to wait here for it to complete. This must
1611 1611 * be done outside of start_fop/end_fop.
1612 1612 */
1613 1613 (void) nfs4_waitfor_purge_complete(vp);
1614 1614
1615 1615 /*
1616 1616 * It is implicit that we are in the open case (create_flag == 0) since
1617 1617 * fh_differs can only be set to a non-zero value in the open case.
1618 1618 */
1619 1619 if (fh_differs != 0 && vpi != NULL)
1620 1620 VN_RELE(vpi);
1621 1621
1622 1622 /*
1623 1623 * Be sure to set *vpp to the correct value before returning.
1624 1624 */
1625 1625 *vpp = vp;
1626 1626
1627 1627 skip_update_dircaches:
1628 1628
1629 1629 nfs4args_copen_free(open_args);
1630 1630 if (setgid_flag) {
1631 1631 nfs4args_verify_free(&argop[8]);
1632 1632 nfs4args_setattr_free(&argop[9]);
1633 1633 }
1634 1634 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1635 1635
1636 1636 if (ncr)
1637 1637 crfree(ncr);
1638 1638 kmem_free(argop, argoplist_size);
1639 1639 return (e.error);
1640 1640 }
1641 1641
1642 1642 /*
1643 1643 * Reopen an open instance. cf. nfs4open_otw().
1644 1644 *
1645 1645 * Errors are returned by the nfs4_error_t parameter.
1646 1646 * - ep->error contains an errno value or zero.
1647 1647 * - if it is zero, ep->stat is set to an NFS status code, if any.
1648 1648 * If the file could not be reopened, but the caller should continue, the
1649 1649 * file is marked dead and no error values are returned. If the caller
1650 1650 * should stop recovering open files and start over, either the ep->error
1651 1651 * value or ep->stat will indicate an error (either something that requires
1652 1652 * recovery or EAGAIN). Note that some recovery (e.g., expired volatile
1653 1653 * filehandles) may be handled silently by this routine.
1654 1654 * - if it is EINTR, ETIMEDOUT, or NFS4_FRC_UNMT_ERR, recovery for lost state
1655 1655 * will be started, so the caller should not do it.
1656 1656 *
1657 1657 * Gotos:
1658 1658 * - kill_file : reopen failed in such a fashion to constitute marking the
1659 1659 * file dead and setting the open stream's 'os_failed_reopen' as 1. This
1660 1660 * is for cases where recovery is not possible.
1661 1661 * - failed_reopen : same as above, except that the file has already been
1662 1662 * marked dead, so no need to do it again.
1663 1663 * - bailout : reopen failed but we are able to recover and retry the reopen -
1664 1664 * either within this function immediately or via the calling function.
1665 1665 */
1666 1666
1667 1667 void
1668 1668 nfs4_reopen(vnode_t *vp, nfs4_open_stream_t *osp, nfs4_error_t *ep,
1669 1669 open_claim_type4 claim, bool_t frc_use_claim_previous,
1670 1670 bool_t is_recov)
1671 1671 {
1672 1672 COMPOUND4args_clnt args;
1673 1673 COMPOUND4res_clnt res;
1674 1674 nfs_argop4 argop[4];
1675 1675 nfs_resop4 *resop;
1676 1676 OPEN4res *op_res = NULL;
1677 1677 OPEN4cargs *open_args;
1678 1678 GETFH4res *gf_res;
1679 1679 rnode4_t *rp = VTOR4(vp);
1680 1680 int doqueue = 1;
1681 1681 cred_t *cr = NULL, *cred_otw = NULL;
1682 1682 nfs4_open_owner_t *oop = NULL;
1683 1683 seqid4 seqid;
1684 1684 nfs4_ga_res_t *garp;
1685 1685 char fn[MAXNAMELEN];
1686 1686 nfs4_recov_state_t recov = {NULL, 0};
1687 1687 nfs4_lost_rqst_t lost_rqst;
1688 1688 mntinfo4_t *mi = VTOMI4(vp);
1689 1689 bool_t abort;
1690 1690 char *failed_msg = "";
1691 1691 int fh_different;
1692 1692 hrtime_t t;
1693 1693 nfs4_bseqid_entry_t *bsep = NULL;
1694 1694
1695 1695 ASSERT(nfs4_consistent_type(vp));
1696 1696 ASSERT(nfs_zone() == mi->mi_zone);
1697 1697
1698 1698 nfs4_error_zinit(ep);
1699 1699
1700 1700 /* this is the cred used to find the open owner */
1701 1701 cr = state_to_cred(osp);
1702 1702 if (cr == NULL) {
1703 1703 failed_msg = "Couldn't reopen: no cred";
1704 1704 goto kill_file;
1705 1705 }
1706 1706 /* use this cred for OTW operations */
1707 1707 cred_otw = nfs4_get_otw_cred(cr, mi, osp->os_open_owner);
1708 1708
1709 1709 top:
1710 1710 nfs4_error_zinit(ep);
1711 1711
1712 1712 if (mi->mi_vfsp->vfs_flag & VFS_UNMOUNTED) {
1713 1713 /* File system has been unmounted, quit */
1714 1714 ep->error = EIO;
1715 1715 failed_msg = "Couldn't reopen: file system has been unmounted";
1716 1716 goto kill_file;
1717 1717 }
1718 1718
1719 1719 oop = osp->os_open_owner;
1720 1720
1721 1721 ASSERT(oop != NULL);
1722 1722 if (oop == NULL) { /* be defensive in non-DEBUG */
1723 1723 failed_msg = "can't reopen: no open owner";
1724 1724 goto kill_file;
1725 1725 }
1726 1726 open_owner_hold(oop);
1727 1727
1728 1728 ep->error = nfs4_start_open_seqid_sync(oop, mi);
1729 1729 if (ep->error) {
1730 1730 open_owner_rele(oop);
1731 1731 oop = NULL;
1732 1732 goto bailout;
1733 1733 }
1734 1734
1735 1735 /*
1736 1736 * If the rnode has a delegation and the delegation has been
1737 1737 * recovered and the server didn't request a recall and the caller
1738 1738 * didn't specifically ask for CLAIM_PREVIOUS (nfs4frlock during
1739 1739 * recovery) and the rnode hasn't been marked dead, then install
1740 1740 * the delegation stateid in the open stream. Otherwise, proceed
1741 1741 * with a CLAIM_PREVIOUS or CLAIM_NULL OPEN.
1742 1742 */
1743 1743 mutex_enter(&rp->r_statev4_lock);
1744 1744 if (rp->r_deleg_type != OPEN_DELEGATE_NONE &&
1745 1745 !rp->r_deleg_return_pending &&
1746 1746 (rp->r_deleg_needs_recovery == OPEN_DELEGATE_NONE) &&
1747 1747 !rp->r_deleg_needs_recall &&
1748 1748 claim != CLAIM_DELEGATE_CUR && !frc_use_claim_previous &&
1749 1749 !(rp->r_flags & R4RECOVERR)) {
1750 1750 mutex_enter(&osp->os_sync_lock);
1751 1751 osp->os_delegation = 1;
1752 1752 osp->open_stateid = rp->r_deleg_stateid;
1753 1753 mutex_exit(&osp->os_sync_lock);
1754 1754 mutex_exit(&rp->r_statev4_lock);
1755 1755 goto bailout;
1756 1756 }
1757 1757 mutex_exit(&rp->r_statev4_lock);
1758 1758
1759 1759 /*
1760 1760 * If the file failed recovery, just quit. This failure need not
1761 1761 * affect other reopens, so don't return an error.
1762 1762 */
1763 1763 mutex_enter(&rp->r_statelock);
1764 1764 if (rp->r_flags & R4RECOVERR) {
1765 1765 mutex_exit(&rp->r_statelock);
1766 1766 ep->error = 0;
1767 1767 goto failed_reopen;
1768 1768 }
1769 1769 mutex_exit(&rp->r_statelock);
1770 1770
1771 1771 /*
1772 1772 * argop is empty here
1773 1773 *
1774 1774 * PUTFH, OPEN, GETATTR
1775 1775 */
1776 1776 args.ctag = TAG_REOPEN;
1777 1777 args.array_len = 4;
1778 1778 args.array = argop;
1779 1779
1780 1780 NFS4_DEBUG(nfs4_client_failover_debug, (CE_NOTE,
1781 1781 "nfs4_reopen: file is type %d, id %s",
1782 1782 vp->v_type, rnode4info(VTOR4(vp))));
1783 1783
1784 1784 argop[0].argop = OP_CPUTFH;
1785 1785
1786 1786 if (claim != CLAIM_PREVIOUS) {
1787 1787 /*
1788 1788 * if this is a file mount then
1789 1789 * use the mntinfo parentfh
1790 1790 */
1791 1791 argop[0].nfs_argop4_u.opcputfh.sfh =
1792 1792 (vp->v_flag & VROOT) ? mi->mi_srvparentfh :
1793 1793 VTOSV(vp)->sv_dfh;
1794 1794 } else {
1795 1795 /* putfh fh to reopen */
1796 1796 argop[0].nfs_argop4_u.opcputfh.sfh = rp->r_fh;
1797 1797 }
1798 1798
1799 1799 argop[1].argop = OP_COPEN;
1800 1800 open_args = &argop[1].nfs_argop4_u.opcopen;
1801 1801 open_args->claim = claim;
1802 1802
1803 1803 if (claim == CLAIM_NULL) {
1804 1804
1805 1805 if ((ep->error = vtoname(vp, fn, MAXNAMELEN)) != 0) {
1806 1806 nfs_cmn_err(ep->error, CE_WARN, "nfs4_reopen: vtoname "
1807 1807 "failed for vp 0x%p for CLAIM_NULL with %m",
1808 1808 (void *)vp);
1809 1809 failed_msg = "Couldn't reopen: vtoname failed for "
1810 1810 "CLAIM_NULL";
1811 1811 /* nothing allocated yet */
1812 1812 goto kill_file;
1813 1813 }
1814 1814
1815 1815 open_args->open_claim4_u.cfile = fn;
1816 1816 } else if (claim == CLAIM_PREVIOUS) {
1817 1817
1818 1818 /*
1819 1819 * We have two cases to deal with here:
1820 1820 * 1) We're being called to reopen files in order to satisfy
1821 1821 * a lock operation request which requires us to explicitly
1822 1822 * reopen files which were opened under a delegation. If
1823 1823 * we're in recovery, we *must* use CLAIM_PREVIOUS. In
1824 1824 * that case, frc_use_claim_previous is TRUE and we must
1825 1825 * use the rnode's current delegation type (r_deleg_type).
1826 1826 * 2) We're reopening files during some form of recovery.
1827 1827 * In this case, frc_use_claim_previous is FALSE and we
1828 1828 * use the delegation type appropriate for recovery
1829 1829 * (r_deleg_needs_recovery).
1830 1830 */
1831 1831 mutex_enter(&rp->r_statev4_lock);
1832 1832 open_args->open_claim4_u.delegate_type =
1833 1833 frc_use_claim_previous ?
1834 1834 rp->r_deleg_type :
1835 1835 rp->r_deleg_needs_recovery;
1836 1836 mutex_exit(&rp->r_statev4_lock);
1837 1837
1838 1838 } else if (claim == CLAIM_DELEGATE_CUR) {
1839 1839
1840 1840 if ((ep->error = vtoname(vp, fn, MAXNAMELEN)) != 0) {
1841 1841 nfs_cmn_err(ep->error, CE_WARN, "nfs4_reopen: vtoname "
1842 1842 "failed for vp 0x%p for CLAIM_DELEGATE_CUR "
1843 1843 "with %m", (void *)vp);
1844 1844 failed_msg = "Couldn't reopen: vtoname failed for "
1845 1845 "CLAIM_DELEGATE_CUR";
1846 1846 /* nothing allocated yet */
1847 1847 goto kill_file;
1848 1848 }
1849 1849
1850 1850 mutex_enter(&rp->r_statev4_lock);
1851 1851 open_args->open_claim4_u.delegate_cur_info.delegate_stateid =
1852 1852 rp->r_deleg_stateid;
1853 1853 mutex_exit(&rp->r_statev4_lock);
1854 1854
1855 1855 open_args->open_claim4_u.delegate_cur_info.cfile = fn;
1856 1856 }
1857 1857 open_args->opentype = OPEN4_NOCREATE;
1858 1858 open_args->owner.clientid = mi2clientid(mi);
1859 1859 open_args->owner.owner_len = sizeof (oop->oo_name);
1860 1860 open_args->owner.owner_val =
1861 1861 kmem_alloc(open_args->owner.owner_len, KM_SLEEP);
1862 1862 bcopy(&oop->oo_name, open_args->owner.owner_val,
1863 1863 open_args->owner.owner_len);
1864 1864 open_args->share_access = 0;
1865 1865 open_args->share_deny = 0;
1866 1866
1867 1867 mutex_enter(&osp->os_sync_lock);
1868 1868 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE, "nfs4_reopen: osp %p rp "
1869 1869 "%p: read acc %"PRIu64" write acc %"PRIu64": open ref count %d: "
1870 1870 "mmap read %"PRIu64" mmap write %"PRIu64" claim %d ",
1871 1871 (void *)osp, (void *)rp, osp->os_share_acc_read,
1872 1872 osp->os_share_acc_write, osp->os_open_ref_count,
1873 1873 osp->os_mmap_read, osp->os_mmap_write, claim));
1874 1874
1875 1875 if (osp->os_share_acc_read || osp->os_mmap_read)
1876 1876 open_args->share_access |= OPEN4_SHARE_ACCESS_READ;
1877 1877 if (osp->os_share_acc_write || osp->os_mmap_write)
1878 1878 open_args->share_access |= OPEN4_SHARE_ACCESS_WRITE;
1879 1879 if (osp->os_share_deny_read)
1880 1880 open_args->share_deny |= OPEN4_SHARE_DENY_READ;
1881 1881 if (osp->os_share_deny_write)
1882 1882 open_args->share_deny |= OPEN4_SHARE_DENY_WRITE;
1883 1883 mutex_exit(&osp->os_sync_lock);
1884 1884
1885 1885 seqid = nfs4_get_open_seqid(oop) + 1;
1886 1886 open_args->seqid = seqid;
1887 1887
1888 1888 /* Construct the getfh part of the compound */
1889 1889 argop[2].argop = OP_GETFH;
1890 1890
1891 1891 /* Construct the getattr part of the compound */
1892 1892 argop[3].argop = OP_GETATTR;
1893 1893 argop[3].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
1894 1894 argop[3].nfs_argop4_u.opgetattr.mi = mi;
1895 1895
1896 1896 t = gethrtime();
1897 1897
1898 1898 rfs4call(mi, &args, &res, cred_otw, &doqueue, 0, ep);
1899 1899
1900 1900 if (ep->error) {
1901 1901 if (!is_recov && !frc_use_claim_previous &&
1902 1902 (ep->error == EINTR || ep->error == ETIMEDOUT ||
1903 1903 NFS4_FRC_UNMT_ERR(ep->error, vp->v_vfsp))) {
1904 1904 nfs4open_save_lost_rqst(ep->error, &lost_rqst, oop,
1905 1905 cred_otw, vp, NULL, open_args);
1906 1906 abort = nfs4_start_recovery(ep,
1907 1907 VTOMI4(vp), vp, NULL, NULL,
1908 1908 lost_rqst.lr_op == OP_OPEN ?
1909 1909 &lost_rqst : NULL, OP_OPEN, NULL, NULL, NULL);
1910 1910 nfs4args_copen_free(open_args);
1911 1911 goto bailout;
1912 1912 }
1913 1913
1914 1914 nfs4args_copen_free(open_args);
1915 1915
1916 1916 if (ep->error == EACCES && cred_otw != cr) {
1917 1917 crfree(cred_otw);
1918 1918 cred_otw = cr;
1919 1919 crhold(cred_otw);
1920 1920 nfs4_end_open_seqid_sync(oop);
1921 1921 open_owner_rele(oop);
1922 1922 oop = NULL;
1923 1923 goto top;
1924 1924 }
1925 1925 if (ep->error == ETIMEDOUT)
1926 1926 goto bailout;
1927 1927 failed_msg = "Couldn't reopen: rpc error";
1928 1928 goto kill_file;
1929 1929 }
1930 1930
1931 1931 if (nfs4_need_to_bump_seqid(&res))
1932 1932 nfs4_set_open_seqid(seqid, oop, args.ctag);
1933 1933
1934 1934 switch (res.status) {
1935 1935 case NFS4_OK:
1936 1936 if (recov.rs_flags & NFS4_RS_DELAY_MSG) {
1937 1937 mutex_enter(&rp->r_statelock);
1938 1938 rp->r_delay_interval = 0;
1939 1939 mutex_exit(&rp->r_statelock);
1940 1940 }
1941 1941 break;
1942 1942 case NFS4ERR_BAD_SEQID:
1943 1943 bsep = nfs4_create_bseqid_entry(oop, NULL, vp, 0,
1944 1944 args.ctag, open_args->seqid);
1945 1945
1946 1946 abort = nfs4_start_recovery(ep, VTOMI4(vp), vp, NULL,
1947 1947 NULL, lost_rqst.lr_op == OP_OPEN ? &lost_rqst :
1948 1948 NULL, OP_OPEN, bsep, NULL, NULL);
1949 1949
1950 1950 nfs4args_copen_free(open_args);
1951 1951 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1952 1952 nfs4_end_open_seqid_sync(oop);
1953 1953 open_owner_rele(oop);
1954 1954 oop = NULL;
1955 1955 kmem_free(bsep, sizeof (*bsep));
1956 1956
1957 1957 goto kill_file;
1958 1958 case NFS4ERR_NO_GRACE:
1959 1959 nfs4args_copen_free(open_args);
1960 1960 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1961 1961 nfs4_end_open_seqid_sync(oop);
1962 1962 open_owner_rele(oop);
1963 1963 oop = NULL;
1964 1964 if (claim == CLAIM_PREVIOUS) {
1965 1965 /*
1966 1966 * Retry as a plain open. We don't need to worry about
1967 1967 * checking the changeinfo: it is acceptable for a
1968 1968 * client to re-open a file and continue processing
1969 1969 * (in the absence of locks).
1970 1970 */
1971 1971 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
1972 1972 "nfs4_reopen: CLAIM_PREVIOUS: NFS4ERR_NO_GRACE; "
1973 1973 "will retry as CLAIM_NULL"));
1974 1974 claim = CLAIM_NULL;
1975 1975 nfs4_mi_kstat_inc_no_grace(mi);
1976 1976 goto top;
1977 1977 }
1978 1978 failed_msg =
1979 1979 "Couldn't reopen: tried reclaim outside grace period. ";
1980 1980 goto kill_file;
1981 1981 case NFS4ERR_GRACE:
1982 1982 nfs4_set_grace_wait(mi);
1983 1983 nfs4args_copen_free(open_args);
1984 1984 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1985 1985 nfs4_end_open_seqid_sync(oop);
1986 1986 open_owner_rele(oop);
1987 1987 oop = NULL;
1988 1988 ep->error = nfs4_wait_for_grace(mi, &recov);
1989 1989 if (ep->error != 0)
1990 1990 goto bailout;
1991 1991 goto top;
1992 1992 case NFS4ERR_DELAY:
1993 1993 nfs4_set_delay_wait(vp);
1994 1994 nfs4args_copen_free(open_args);
1995 1995 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
1996 1996 nfs4_end_open_seqid_sync(oop);
1997 1997 open_owner_rele(oop);
1998 1998 oop = NULL;
1999 1999 ep->error = nfs4_wait_for_delay(vp, &recov);
2000 2000 nfs4_mi_kstat_inc_delay(mi);
2001 2001 if (ep->error != 0)
2002 2002 goto bailout;
2003 2003 goto top;
2004 2004 case NFS4ERR_FHEXPIRED:
2005 2005 /* recover filehandle and retry */
2006 2006 abort = nfs4_start_recovery(ep,
2007 2007 mi, vp, NULL, NULL, NULL, OP_OPEN, NULL, NULL, NULL);
2008 2008 nfs4args_copen_free(open_args);
2009 2009 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2010 2010 nfs4_end_open_seqid_sync(oop);
2011 2011 open_owner_rele(oop);
2012 2012 oop = NULL;
2013 2013 if (abort == FALSE)
2014 2014 goto top;
2015 2015 failed_msg = "Couldn't reopen: recovery aborted";
2016 2016 goto kill_file;
2017 2017 case NFS4ERR_RESOURCE:
2018 2018 case NFS4ERR_STALE_CLIENTID:
2019 2019 case NFS4ERR_WRONGSEC:
2020 2020 case NFS4ERR_EXPIRED:
2021 2021 /*
2022 2022 * Do not mark the file dead and let the calling
2023 2023 * function initiate recovery.
2024 2024 */
2025 2025 nfs4args_copen_free(open_args);
2026 2026 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2027 2027 nfs4_end_open_seqid_sync(oop);
2028 2028 open_owner_rele(oop);
2029 2029 oop = NULL;
2030 2030 goto bailout;
2031 2031 case NFS4ERR_ACCESS:
2032 2032 if (cred_otw != cr) {
2033 2033 crfree(cred_otw);
2034 2034 cred_otw = cr;
2035 2035 crhold(cred_otw);
2036 2036 nfs4args_copen_free(open_args);
2037 2037 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2038 2038 nfs4_end_open_seqid_sync(oop);
2039 2039 open_owner_rele(oop);
2040 2040 oop = NULL;
2041 2041 goto top;
2042 2042 }
2043 2043 /* fall through */
2044 2044 default:
2045 2045 NFS4_DEBUG(nfs4_client_failover_debug, (CE_NOTE,
2046 2046 "nfs4_reopen: r_server 0x%p, mi_curr_serv 0x%p, rnode %s",
2047 2047 (void*)VTOR4(vp)->r_server, (void*)mi->mi_curr_serv,
2048 2048 rnode4info(VTOR4(vp))));
2049 2049 failed_msg = "Couldn't reopen: NFSv4 error";
2050 2050 nfs4args_copen_free(open_args);
2051 2051 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2052 2052 goto kill_file;
2053 2053 }
2054 2054
2055 2055 resop = &res.array[1]; /* open res */
2056 2056 op_res = &resop->nfs_resop4_u.opopen;
2057 2057
2058 2058 garp = &res.array[3].nfs_resop4_u.opgetattr.ga_res;
2059 2059
2060 2060 /*
2061 2061 * Check if the path we reopened really is the same
2062 2062 * file. We could end up in a situation where the file
2063 2063 * was removed and a new file created with the same name.
2064 2064 */
2065 2065 resop = &res.array[2];
2066 2066 gf_res = &resop->nfs_resop4_u.opgetfh;
2067 2067 (void) nfs_rw_enter_sig(&mi->mi_fh_lock, RW_READER, 0);
2068 2068 fh_different = (nfs4cmpfh(&rp->r_fh->sfh_fh, &gf_res->object) != 0);
2069 2069 if (fh_different) {
2070 2070 if (mi->mi_fh_expire_type == FH4_PERSISTENT ||
2071 2071 mi->mi_fh_expire_type & FH4_NOEXPIRE_WITH_OPEN) {
2072 2072 /* Oops, we don't have the same file */
2073 2073 if (mi->mi_fh_expire_type == FH4_PERSISTENT)
2074 2074 failed_msg = "Couldn't reopen: Persistent "
2075 2075 "file handle changed";
2076 2076 else
2077 2077 failed_msg = "Couldn't reopen: Volatile "
2078 2078 "(no expire on open) file handle changed";
2079 2079
2080 2080 nfs4args_copen_free(open_args);
2081 2081 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2082 2082 nfs_rw_exit(&mi->mi_fh_lock);
2083 2083 goto kill_file;
2084 2084
2085 2085 } else {
2086 2086 /*
2087 2087 * We have volatile file handles that don't compare.
2088 2088 * If the fids are the same then we assume that the
2089 2089 * file handle expired but the rnode still refers to
2090 2090 * the same file object.
2091 2091 *
2092 2092 * First check that we have fids or not.
2093 2093 * If we don't we have a dumb server so we will
2094 2094 * just assume every thing is ok for now.
2095 2095 */
2096 2096 if (!ep->error && garp->n4g_va.va_mask & AT_NODEID &&
2097 2097 rp->r_attr.va_mask & AT_NODEID &&
2098 2098 rp->r_attr.va_nodeid != garp->n4g_va.va_nodeid) {
2099 2099 /*
2100 2100 * We have fids, but they don't
2101 2101 * compare. So kill the file.
2102 2102 */
2103 2103 failed_msg =
2104 2104 "Couldn't reopen: file handle changed"
2105 2105 " due to mismatched fids";
2106 2106 nfs4args_copen_free(open_args);
2107 2107 (void) xdr_free(xdr_COMPOUND4res_clnt,
2108 2108 (caddr_t)&res);
2109 2109 nfs_rw_exit(&mi->mi_fh_lock);
2110 2110 goto kill_file;
2111 2111 } else {
2112 2112 /*
2113 2113 * We have volatile file handles that refers
2114 2114 * to the same file (at least they have the
2115 2115 * same fid) or we don't have fids so we
2116 2116 * can't tell. :(. We'll be a kind and accepting
2117 2117 * client so we'll update the rnode's file
2118 2118 * handle with the otw handle.
2119 2119 *
2120 2120 * We need to drop mi->mi_fh_lock since
2121 2121 * sh4_update acquires it. Since there is
2122 2122 * only one recovery thread there is no
2123 2123 * race.
2124 2124 */
2125 2125 nfs_rw_exit(&mi->mi_fh_lock);
2126 2126 sfh4_update(rp->r_fh, &gf_res->object);
2127 2127 }
2128 2128 }
2129 2129 } else {
2130 2130 nfs_rw_exit(&mi->mi_fh_lock);
2131 2131 }
2132 2132
2133 2133 ASSERT(nfs4_consistent_type(vp));
2134 2134
2135 2135 /*
2136 2136 * If the server wanted an OPEN_CONFIRM but that fails, just start
2137 2137 * over. Presumably if there is a persistent error it will show up
2138 2138 * when we resend the OPEN.
2139 2139 */
2140 2140 if (op_res->rflags & OPEN4_RESULT_CONFIRM) {
2141 2141 bool_t retry_open = FALSE;
2142 2142
2143 2143 nfs4open_confirm(vp, &seqid, &op_res->stateid,
2144 2144 cred_otw, is_recov, &retry_open,
2145 2145 oop, FALSE, ep, NULL);
2146 2146 if (ep->error || ep->stat) {
2147 2147 nfs4args_copen_free(open_args);
2148 2148 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2149 2149 nfs4_end_open_seqid_sync(oop);
2150 2150 open_owner_rele(oop);
2151 2151 oop = NULL;
2152 2152 goto top;
2153 2153 }
2154 2154 }
2155 2155
2156 2156 mutex_enter(&osp->os_sync_lock);
2157 2157 osp->open_stateid = op_res->stateid;
2158 2158 osp->os_delegation = 0;
2159 2159 /*
2160 2160 * Need to reset this bitfield for the possible case where we were
2161 2161 * going to OTW CLOSE the file, got a non-recoverable error, and before
2162 2162 * we could retry the CLOSE, OPENed the file again.
2163 2163 */
2164 2164 ASSERT(osp->os_open_owner->oo_seqid_inuse);
2165 2165 osp->os_final_close = 0;
2166 2166 osp->os_force_close = 0;
2167 2167 if (claim == CLAIM_DELEGATE_CUR || claim == CLAIM_PREVIOUS)
2168 2168 osp->os_dc_openacc = open_args->share_access;
2169 2169 mutex_exit(&osp->os_sync_lock);
2170 2170
2171 2171 nfs4_end_open_seqid_sync(oop);
2172 2172
2173 2173 /* accept delegation, if any */
2174 2174 nfs4_delegation_accept(rp, claim, op_res, garp, cred_otw);
2175 2175
2176 2176 nfs4args_copen_free(open_args);
2177 2177
2178 2178 nfs4_attr_cache(vp, garp, t, cr, TRUE, NULL);
2179 2179
2180 2180 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2181 2181
2182 2182 ASSERT(nfs4_consistent_type(vp));
2183 2183
2184 2184 open_owner_rele(oop);
2185 2185 crfree(cr);
2186 2186 crfree(cred_otw);
2187 2187 return;
2188 2188
2189 2189 kill_file:
2190 2190 nfs4_fail_recov(vp, failed_msg, ep->error, ep->stat);
2191 2191 failed_reopen:
2192 2192 NFS4_DEBUG(nfs4_open_stream_debug, (CE_NOTE,
2193 2193 "nfs4_reopen: setting os_failed_reopen for osp %p, cr %p, rp %s",
2194 2194 (void *)osp, (void *)cr, rnode4info(rp)));
2195 2195 mutex_enter(&osp->os_sync_lock);
2196 2196 osp->os_failed_reopen = 1;
2197 2197 mutex_exit(&osp->os_sync_lock);
2198 2198 bailout:
2199 2199 if (oop != NULL) {
2200 2200 nfs4_end_open_seqid_sync(oop);
2201 2201 open_owner_rele(oop);
2202 2202 }
2203 2203 if (cr != NULL)
2204 2204 crfree(cr);
2205 2205 if (cred_otw != NULL)
2206 2206 crfree(cred_otw);
2207 2207 }
2208 2208
2209 2209 /* for . and .. OPENs */
2210 2210 /* ARGSUSED */
2211 2211 static int
2212 2212 nfs4_open_non_reg_file(vnode_t **vpp, int flag, cred_t *cr)
2213 2213 {
2214 2214 rnode4_t *rp;
2215 2215 nfs4_ga_res_t gar;
2216 2216
2217 2217 ASSERT(nfs_zone() == VTOMI4(*vpp)->mi_zone);
2218 2218
2219 2219 /*
2220 2220 * If close-to-open consistency checking is turned off or
2221 2221 * if there is no cached data, we can avoid
2222 2222 * the over the wire getattr. Otherwise, force a
2223 2223 * call to the server to get fresh attributes and to
2224 2224 * check caches. This is required for close-to-open
2225 2225 * consistency.
2226 2226 */
2227 2227 rp = VTOR4(*vpp);
2228 2228 if (VTOMI4(*vpp)->mi_flags & MI4_NOCTO ||
2229 2229 (rp->r_dir == NULL && !nfs4_has_pages(*vpp)))
2230 2230 return (0);
2231 2231
2232 2232 gar.n4g_va.va_mask = AT_ALL;
2233 2233 return (nfs4_getattr_otw(*vpp, &gar, cr, 0));
2234 2234 }
2235 2235
2236 2236 /*
2237 2237 * CLOSE a file
2238 2238 */
2239 2239 /* ARGSUSED */
2240 2240 static int
2241 2241 nfs4_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr,
2242 2242 caller_context_t *ct)
2243 2243 {
2244 2244 rnode4_t *rp;
2245 2245 int error = 0;
2246 2246 int r_error = 0;
2247 2247 int n4error = 0;
2248 2248 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
2249 2249
2250 2250 /*
2251 2251 * Remove client state for this (lockowner, file) pair.
2252 2252 * Issue otw v4 call to have the server do the same.
2253 2253 */
2254 2254
2255 2255 rp = VTOR4(vp);
2256 2256
2257 2257 /*
2258 2258 * zone_enter(2) prevents processes from changing zones with NFS files
2259 2259 * open; if we happen to get here from the wrong zone we can't do
2260 2260 * anything over the wire.
2261 2261 */
2262 2262 if (VTOMI4(vp)->mi_zone != nfs_zone()) {
2263 2263 /*
2264 2264 * We could attempt to clean up locks, except we're sure
2265 2265 * that the current process didn't acquire any locks on
2266 2266 * the file: any attempt to lock a file belong to another zone
2267 2267 * will fail, and one can't lock an NFS file and then change
2268 2268 * zones, as that fails too.
2269 2269 *
2270 2270 * Returning an error here is the sane thing to do. A
2271 2271 * subsequent call to VN_RELE() which translates to a
2272 2272 * nfs4_inactive() will clean up state: if the zone of the
2273 2273 * vnode's origin is still alive and kicking, the inactive
2274 2274 * thread will handle the request (from the correct zone), and
2275 2275 * everything (minus the OTW close call) should be OK. If the
2276 2276 * zone is going away nfs4_async_inactive() will throw away
2277 2277 * delegations, open streams and cached pages inline.
2278 2278 */
2279 2279 return (EIO);
2280 2280 }
2281 2281
2282 2282 /*
2283 2283 * If we are using local locking for this filesystem, then
2284 2284 * release all of the SYSV style record locks. Otherwise,
2285 2285 * we are doing network locking and we need to release all
2286 2286 * of the network locks. All of the locks held by this
2287 2287 * process on this file are released no matter what the
2288 2288 * incoming reference count is.
2289 2289 */
2290 2290 if (VTOMI4(vp)->mi_flags & MI4_LLOCK) {
2291 2291 cleanlocks(vp, ttoproc(curthread)->p_pid, 0);
2292 2292 cleanshares(vp, ttoproc(curthread)->p_pid);
2293 2293 } else
2294 2294 e.error = nfs4_lockrelease(vp, flag, offset, cr);
2295 2295
2296 2296 if (e.error) {
2297 2297 struct lm_sysid *lmsid;
2298 2298 lmsid = nfs4_find_sysid(VTOMI4(vp));
2299 2299 if (lmsid == NULL) {
2300 2300 DTRACE_PROBE2(unknown__sysid, int, e.error,
2301 2301 vnode_t *, vp);
2302 2302 } else {
2303 2303 cleanlocks(vp, ttoproc(curthread)->p_pid,
2304 2304 (lm_sysidt(lmsid) | LM_SYSID_CLIENT));
2305 2305
2306 2306 lm_rel_sysid(lmsid);
2307 2307 }
2308 2308 return (e.error);
2309 2309 }
2310 2310
2311 2311 if (count > 1)
2312 2312 return (0);
2313 2313
2314 2314 /*
2315 2315 * If the file has been `unlinked', then purge the
2316 2316 * DNLC so that this vnode will get reycled quicker
2317 2317 * and the .nfs* file on the server will get removed.
2318 2318 */
2319 2319 if (rp->r_unldvp != NULL)
2320 2320 dnlc_purge_vp(vp);
2321 2321
2322 2322 /*
2323 2323 * If the file was open for write and there are pages,
2324 2324 * do a synchronous flush and commit of all of the
2325 2325 * dirty and uncommitted pages.
2326 2326 */
2327 2327 ASSERT(!e.error);
2328 2328 if ((flag & FWRITE) && nfs4_has_pages(vp))
2329 2329 error = nfs4_putpage_commit(vp, 0, 0, cr);
2330 2330
2331 2331 mutex_enter(&rp->r_statelock);
2332 2332 r_error = rp->r_error;
2333 2333 rp->r_error = 0;
2334 2334 mutex_exit(&rp->r_statelock);
2335 2335
2336 2336 /*
2337 2337 * If this file type is one for which no explicit 'open' was
2338 2338 * done, then bail now (ie. no need for protocol 'close'). If
2339 2339 * there was an error w/the vm subsystem, return _that_ error,
2340 2340 * otherwise, return any errors that may've been reported via
2341 2341 * the rnode.
2342 2342 */
2343 2343 if (vp->v_type != VREG)
2344 2344 return (error ? error : r_error);
2345 2345
2346 2346 /*
2347 2347 * The sync putpage commit may have failed above, but since
2348 2348 * we're working w/a regular file, we need to do the protocol
2349 2349 * 'close' (nfs4close_one will figure out if an otw close is
2350 2350 * needed or not). Report any errors _after_ doing the protocol
2351 2351 * 'close'.
2352 2352 */
2353 2353 nfs4close_one(vp, NULL, cr, flag, NULL, &e, CLOSE_NORM, 0, 0, 0);
2354 2354 n4error = e.error ? e.error : geterrno4(e.stat);
2355 2355
2356 2356 /*
2357 2357 * Error reporting prio (Hi -> Lo)
2358 2358 *
2359 2359 * i) nfs4_putpage_commit (error)
2360 2360 * ii) rnode's (r_error)
2361 2361 * iii) nfs4close_one (n4error)
2362 2362 */
2363 2363 return (error ? error : (r_error ? r_error : n4error));
2364 2364 }
2365 2365
2366 2366 /*
2367 2367 * Initialize *lost_rqstp.
2368 2368 */
2369 2369
2370 2370 static void
2371 2371 nfs4close_save_lost_rqst(int error, nfs4_lost_rqst_t *lost_rqstp,
2372 2372 nfs4_open_owner_t *oop, nfs4_open_stream_t *osp, cred_t *cr,
2373 2373 vnode_t *vp)
2374 2374 {
2375 2375 if (error != ETIMEDOUT && error != EINTR &&
2376 2376 !NFS4_FRC_UNMT_ERR(error, vp->v_vfsp)) {
2377 2377 lost_rqstp->lr_op = 0;
2378 2378 return;
2379 2379 }
2380 2380
2381 2381 NFS4_DEBUG(nfs4_lost_rqst_debug, (CE_NOTE,
2382 2382 "nfs4close_save_lost_rqst: error %d", error));
2383 2383
2384 2384 lost_rqstp->lr_op = OP_CLOSE;
2385 2385 /*
2386 2386 * The vp is held and rele'd via the recovery code.
2387 2387 * See nfs4_save_lost_rqst.
2388 2388 */
2389 2389 lost_rqstp->lr_vp = vp;
2390 2390 lost_rqstp->lr_dvp = NULL;
2391 2391 lost_rqstp->lr_oop = oop;
2392 2392 lost_rqstp->lr_osp = osp;
2393 2393 ASSERT(osp != NULL);
2394 2394 ASSERT(mutex_owned(&osp->os_sync_lock));
2395 2395 osp->os_pending_close = 1;
2396 2396 lost_rqstp->lr_lop = NULL;
2397 2397 lost_rqstp->lr_cr = cr;
2398 2398 lost_rqstp->lr_flk = NULL;
2399 2399 lost_rqstp->lr_putfirst = FALSE;
2400 2400 }
2401 2401
2402 2402 /*
2403 2403 * Assumes you already have the open seqid sync grabbed as well as the
2404 2404 * 'os_sync_lock'. Note: this will release the open seqid sync and
2405 2405 * 'os_sync_lock' if client recovery starts. Calling functions have to
2406 2406 * be prepared to handle this.
2407 2407 *
2408 2408 * 'recov' is returned as 1 if the CLOSE operation detected client recovery
2409 2409 * was needed and was started, and that the calling function should retry
2410 2410 * this function; otherwise it is returned as 0.
2411 2411 *
2412 2412 * Errors are returned via the nfs4_error_t parameter.
2413 2413 */
2414 2414 static void
2415 2415 nfs4close_otw(rnode4_t *rp, cred_t *cred_otw, nfs4_open_owner_t *oop,
2416 2416 nfs4_open_stream_t *osp, int *recov, int *did_start_seqid_syncp,
2417 2417 nfs4_close_type_t close_type, nfs4_error_t *ep, int *have_sync_lockp)
2418 2418 {
2419 2419 COMPOUND4args_clnt args;
2420 2420 COMPOUND4res_clnt res;
2421 2421 CLOSE4args *close_args;
2422 2422 nfs_resop4 *resop;
2423 2423 nfs_argop4 argop[3];
2424 2424 int doqueue = 1;
2425 2425 mntinfo4_t *mi;
2426 2426 seqid4 seqid;
2427 2427 vnode_t *vp;
2428 2428 bool_t needrecov = FALSE;
2429 2429 nfs4_lost_rqst_t lost_rqst;
2430 2430 hrtime_t t;
2431 2431
2432 2432 ASSERT(nfs_zone() == VTOMI4(RTOV4(rp))->mi_zone);
2433 2433
2434 2434 ASSERT(MUTEX_HELD(&osp->os_sync_lock));
2435 2435
2436 2436 NFS4_DEBUG(nfs4_client_state_debug, (CE_NOTE, "nfs4close_otw"));
2437 2437
2438 2438 /* Only set this to 1 if recovery is started */
2439 2439 *recov = 0;
2440 2440
2441 2441 /* do the OTW call to close the file */
2442 2442
2443 2443 if (close_type == CLOSE_RESEND)
2444 2444 args.ctag = TAG_CLOSE_LOST;
2445 2445 else if (close_type == CLOSE_AFTER_RESEND)
2446 2446 args.ctag = TAG_CLOSE_UNDO;
2447 2447 else
2448 2448 args.ctag = TAG_CLOSE;
2449 2449
2450 2450 args.array_len = 3;
2451 2451 args.array = argop;
2452 2452
2453 2453 vp = RTOV4(rp);
2454 2454
2455 2455 mi = VTOMI4(vp);
2456 2456
2457 2457 /* putfh target fh */
2458 2458 argop[0].argop = OP_CPUTFH;
2459 2459 argop[0].nfs_argop4_u.opcputfh.sfh = rp->r_fh;
2460 2460
2461 2461 argop[1].argop = OP_GETATTR;
2462 2462 argop[1].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
2463 2463 argop[1].nfs_argop4_u.opgetattr.mi = mi;
2464 2464
2465 2465 argop[2].argop = OP_CLOSE;
2466 2466 close_args = &argop[2].nfs_argop4_u.opclose;
2467 2467
2468 2468 seqid = nfs4_get_open_seqid(oop) + 1;
2469 2469
2470 2470 close_args->seqid = seqid;
2471 2471 close_args->open_stateid = osp->open_stateid;
2472 2472
2473 2473 NFS4_DEBUG(nfs4_client_call_debug, (CE_NOTE,
2474 2474 "nfs4close_otw: %s call, rp %s", needrecov ? "recov" : "first",
2475 2475 rnode4info(rp)));
2476 2476
2477 2477 t = gethrtime();
2478 2478
2479 2479 rfs4call(mi, &args, &res, cred_otw, &doqueue, 0, ep);
2480 2480
2481 2481 if (!ep->error && nfs4_need_to_bump_seqid(&res)) {
2482 2482 nfs4_set_open_seqid(seqid, oop, args.ctag);
2483 2483 }
2484 2484
2485 2485 needrecov = nfs4_needs_recovery(ep, TRUE, mi->mi_vfsp);
2486 2486 if (ep->error && !needrecov) {
2487 2487 /*
2488 2488 * if there was an error and no recovery is to be done
2489 2489 * then then set up the file to flush its cache if
2490 2490 * needed for the next caller.
2491 2491 */
2492 2492 mutex_enter(&rp->r_statelock);
2493 2493 PURGE_ATTRCACHE4_LOCKED(rp);
2494 2494 rp->r_flags &= ~R4WRITEMODIFIED;
2495 2495 mutex_exit(&rp->r_statelock);
2496 2496 return;
2497 2497 }
2498 2498
2499 2499 if (needrecov) {
2500 2500 bool_t abort;
2501 2501 nfs4_bseqid_entry_t *bsep = NULL;
2502 2502
2503 2503 if (close_type != CLOSE_RESEND)
2504 2504 nfs4close_save_lost_rqst(ep->error, &lost_rqst, oop,
2505 2505 osp, cred_otw, vp);
2506 2506
2507 2507 if (!ep->error && res.status == NFS4ERR_BAD_SEQID)
2508 2508 bsep = nfs4_create_bseqid_entry(oop, NULL, vp,
2509 2509 0, args.ctag, close_args->seqid);
2510 2510
2511 2511 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
2512 2512 "nfs4close_otw: initiating recovery. error %d "
2513 2513 "res.status %d", ep->error, res.status));
2514 2514
2515 2515 /*
2516 2516 * Drop the 'os_sync_lock' here so we don't hit
2517 2517 * a potential recursive mutex_enter via an
2518 2518 * 'open_stream_hold()'.
2519 2519 */
2520 2520 mutex_exit(&osp->os_sync_lock);
2521 2521 *have_sync_lockp = 0;
2522 2522 abort = nfs4_start_recovery(ep, VTOMI4(vp), vp, NULL, NULL,
2523 2523 (close_type != CLOSE_RESEND &&
2524 2524 lost_rqst.lr_op == OP_CLOSE) ? &lost_rqst : NULL,
2525 2525 OP_CLOSE, bsep, NULL, NULL);
2526 2526
2527 2527 /* drop open seq sync, and let the calling function regrab it */
2528 2528 nfs4_end_open_seqid_sync(oop);
2529 2529 *did_start_seqid_syncp = 0;
2530 2530
2531 2531 if (bsep)
2532 2532 kmem_free(bsep, sizeof (*bsep));
2533 2533 /*
2534 2534 * For signals, the caller wants to quit, so don't say to
2535 2535 * retry. For forced unmount, if it's a user thread, it
2536 2536 * wants to quit. If it's a recovery thread, the retry
2537 2537 * will happen higher-up on the call stack. Either way,
2538 2538 * don't say to retry.
2539 2539 */
2540 2540 if (abort == FALSE && ep->error != EINTR &&
2541 2541 !NFS4_FRC_UNMT_ERR(ep->error, mi->mi_vfsp) &&
2542 2542 close_type != CLOSE_RESEND &&
2543 2543 close_type != CLOSE_AFTER_RESEND)
2544 2544 *recov = 1;
2545 2545 else
2546 2546 *recov = 0;
2547 2547
2548 2548 if (!ep->error)
2549 2549 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2550 2550 return;
2551 2551 }
2552 2552
2553 2553 if (res.status) {
2554 2554 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2555 2555 return;
2556 2556 }
2557 2557
2558 2558 mutex_enter(&rp->r_statev4_lock);
2559 2559 rp->created_v4 = 0;
2560 2560 mutex_exit(&rp->r_statev4_lock);
2561 2561
2562 2562 resop = &res.array[2];
2563 2563 osp->open_stateid = resop->nfs_resop4_u.opclose.open_stateid;
2564 2564 osp->os_valid = 0;
2565 2565
2566 2566 /*
2567 2567 * This removes the reference obtained at OPEN; ie, when the
2568 2568 * open stream structure was created.
2569 2569 *
2570 2570 * We don't have to worry about calling 'open_stream_rele'
2571 2571 * since we our currently holding a reference to the open
2572 2572 * stream which means the count cannot go to 0 with this
2573 2573 * decrement.
2574 2574 */
2575 2575 ASSERT(osp->os_ref_count >= 2);
2576 2576 osp->os_ref_count--;
2577 2577
2578 2578 if (!ep->error)
2579 2579 nfs4_attr_cache(vp,
2580 2580 &res.array[1].nfs_resop4_u.opgetattr.ga_res,
2581 2581 t, cred_otw, TRUE, NULL);
2582 2582
2583 2583 NFS4_DEBUG(nfs4_client_state_debug, (CE_NOTE, "nfs4close_otw:"
2584 2584 " returning %d", ep->error));
2585 2585
2586 2586 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
2587 2587 }
2588 2588
2589 2589 /* ARGSUSED */
2590 2590 static int
2591 2591 nfs4_read(vnode_t *vp, struct uio *uiop, int ioflag, cred_t *cr,
2592 2592 caller_context_t *ct)
2593 2593 {
2594 2594 rnode4_t *rp;
2595 2595 u_offset_t off;
2596 2596 offset_t diff;
2597 2597 uint_t on;
2598 2598 uint_t n;
2599 2599 caddr_t base;
2600 2600 uint_t flags;
2601 2601 int error;
2602 2602 mntinfo4_t *mi;
2603 2603
2604 2604 rp = VTOR4(vp);
2605 2605
2606 2606 ASSERT(nfs_rw_lock_held(&rp->r_rwlock, RW_READER));
2607 2607
2608 2608 if (IS_SHADOW(vp, rp))
2609 2609 vp = RTOV4(rp);
2610 2610
2611 2611 if (vp->v_type != VREG)
2612 2612 return (EISDIR);
2613 2613
2614 2614 mi = VTOMI4(vp);
2615 2615
2616 2616 if (nfs_zone() != mi->mi_zone)
2617 2617 return (EIO);
2618 2618
2619 2619 if (uiop->uio_resid == 0)
2620 2620 return (0);
2621 2621
2622 2622 if (uiop->uio_loffset < 0 || uiop->uio_loffset + uiop->uio_resid < 0)
2623 2623 return (EINVAL);
2624 2624
2625 2625 mutex_enter(&rp->r_statelock);
2626 2626 if (rp->r_flags & R4RECOVERRP)
2627 2627 error = (rp->r_error ? rp->r_error : EIO);
2628 2628 else
2629 2629 error = 0;
2630 2630 mutex_exit(&rp->r_statelock);
2631 2631 if (error)
2632 2632 return (error);
2633 2633
2634 2634 /*
2635 2635 * Bypass VM if caching has been disabled (e.g., locking) or if
2636 2636 * using client-side direct I/O and the file is not mmap'd and
2637 2637 * there are no cached pages.
2638 2638 */
2639 2639 if ((vp->v_flag & VNOCACHE) ||
2640 2640 (((rp->r_flags & R4DIRECTIO) || (mi->mi_flags & MI4_DIRECTIO)) &&
2641 2641 rp->r_mapcnt == 0 && rp->r_inmap == 0 && !nfs4_has_pages(vp))) {
2642 2642 size_t resid = 0;
2643 2643
2644 2644 return (nfs4read(vp, NULL, uiop->uio_loffset,
2645 2645 uiop->uio_resid, &resid, cr, FALSE, uiop));
2646 2646 }
2647 2647
2648 2648 error = 0;
2649 2649
2650 2650 do {
2651 2651 off = uiop->uio_loffset & MAXBMASK; /* mapping offset */
2652 2652 on = uiop->uio_loffset & MAXBOFFSET; /* Relative offset */
2653 2653 n = MIN(MAXBSIZE - on, uiop->uio_resid);
2654 2654
2655 2655 if (error = nfs4_validate_caches(vp, cr))
2656 2656 break;
2657 2657
2658 2658 mutex_enter(&rp->r_statelock);
2659 2659 while (rp->r_flags & R4INCACHEPURGE) {
2660 2660 if (!cv_wait_sig(&rp->r_cv, &rp->r_statelock)) {
2661 2661 mutex_exit(&rp->r_statelock);
2662 2662 return (EINTR);
2663 2663 }
2664 2664 }
2665 2665 diff = rp->r_size - uiop->uio_loffset;
2666 2666 mutex_exit(&rp->r_statelock);
2667 2667 if (diff <= 0)
2668 2668 break;
2669 2669 if (diff < n)
2670 2670 n = (uint_t)diff;
2671 2671
2672 2672 if (vpm_enable) {
2673 2673 /*
2674 2674 * Copy data.
2675 2675 */
2676 2676 error = vpm_data_copy(vp, off + on, n, uiop,
2677 2677 1, NULL, 0, S_READ);
2678 2678 } else {
2679 2679 base = segmap_getmapflt(segkmap, vp, off + on, n, 1,
2680 2680 S_READ);
2681 2681
2682 2682 error = uiomove(base + on, n, UIO_READ, uiop);
2683 2683 }
2684 2684
2685 2685 if (!error) {
2686 2686 /*
2687 2687 * If read a whole block or read to eof,
2688 2688 * won't need this buffer again soon.
2689 2689 */
2690 2690 mutex_enter(&rp->r_statelock);
2691 2691 if (n + on == MAXBSIZE ||
2692 2692 uiop->uio_loffset == rp->r_size)
2693 2693 flags = SM_DONTNEED;
2694 2694 else
2695 2695 flags = 0;
2696 2696 mutex_exit(&rp->r_statelock);
2697 2697 if (vpm_enable) {
2698 2698 error = vpm_sync_pages(vp, off, n, flags);
2699 2699 } else {
2700 2700 error = segmap_release(segkmap, base, flags);
2701 2701 }
2702 2702 } else {
2703 2703 if (vpm_enable) {
2704 2704 (void) vpm_sync_pages(vp, off, n, 0);
2705 2705 } else {
2706 2706 (void) segmap_release(segkmap, base, 0);
2707 2707 }
2708 2708 }
2709 2709 } while (!error && uiop->uio_resid > 0);
2710 2710
2711 2711 return (error);
2712 2712 }
2713 2713
2714 2714 /* ARGSUSED */
2715 2715 static int
2716 2716 nfs4_write(vnode_t *vp, struct uio *uiop, int ioflag, cred_t *cr,
2717 2717 caller_context_t *ct)
2718 2718 {
2719 2719 rlim64_t limit = uiop->uio_llimit;
2720 2720 rnode4_t *rp;
2721 2721 u_offset_t off;
2722 2722 caddr_t base;
2723 2723 uint_t flags;
2724 2724 int remainder;
2725 2725 size_t n;
2726 2726 int on;
2727 2727 int error;
2728 2728 int resid;
2729 2729 u_offset_t offset;
2730 2730 mntinfo4_t *mi;
2731 2731 uint_t bsize;
2732 2732
2733 2733 rp = VTOR4(vp);
2734 2734
2735 2735 if (IS_SHADOW(vp, rp))
2736 2736 vp = RTOV4(rp);
2737 2737
2738 2738 if (vp->v_type != VREG)
2739 2739 return (EISDIR);
2740 2740
2741 2741 mi = VTOMI4(vp);
2742 2742
2743 2743 if (nfs_zone() != mi->mi_zone)
2744 2744 return (EIO);
2745 2745
2746 2746 if (uiop->uio_resid == 0)
2747 2747 return (0);
2748 2748
2749 2749 mutex_enter(&rp->r_statelock);
2750 2750 if (rp->r_flags & R4RECOVERRP)
2751 2751 error = (rp->r_error ? rp->r_error : EIO);
2752 2752 else
2753 2753 error = 0;
2754 2754 mutex_exit(&rp->r_statelock);
2755 2755 if (error)
2756 2756 return (error);
2757 2757
2758 2758 if (ioflag & FAPPEND) {
2759 2759 struct vattr va;
2760 2760
2761 2761 /*
2762 2762 * Must serialize if appending.
2763 2763 */
2764 2764 if (nfs_rw_lock_held(&rp->r_rwlock, RW_READER)) {
2765 2765 nfs_rw_exit(&rp->r_rwlock);
2766 2766 if (nfs_rw_enter_sig(&rp->r_rwlock, RW_WRITER,
2767 2767 INTR4(vp)))
2768 2768 return (EINTR);
2769 2769 }
2770 2770
2771 2771 va.va_mask = AT_SIZE;
2772 2772 error = nfs4getattr(vp, &va, cr);
2773 2773 if (error)
2774 2774 return (error);
2775 2775 uiop->uio_loffset = va.va_size;
2776 2776 }
2777 2777
2778 2778 offset = uiop->uio_loffset + uiop->uio_resid;
2779 2779
2780 2780 if (uiop->uio_loffset < (offset_t)0 || offset < 0)
2781 2781 return (EINVAL);
2782 2782
2783 2783 if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T)
2784 2784 limit = MAXOFFSET_T;
2785 2785
2786 2786 /*
2787 2787 * Check to make sure that the process will not exceed
2788 2788 * its limit on file size. It is okay to write up to
2789 2789 * the limit, but not beyond. Thus, the write which
2790 2790 * reaches the limit will be short and the next write
2791 2791 * will return an error.
2792 2792 */
2793 2793 remainder = 0;
2794 2794 if (offset > uiop->uio_llimit) {
2795 2795 remainder = offset - uiop->uio_llimit;
2796 2796 uiop->uio_resid = uiop->uio_llimit - uiop->uio_loffset;
2797 2797 if (uiop->uio_resid <= 0) {
2798 2798 proc_t *p = ttoproc(curthread);
2799 2799
2800 2800 uiop->uio_resid += remainder;
2801 2801 mutex_enter(&p->p_lock);
2802 2802 (void) rctl_action(rctlproc_legacy[RLIMIT_FSIZE],
2803 2803 p->p_rctls, p, RCA_UNSAFE_SIGINFO);
2804 2804 mutex_exit(&p->p_lock);
2805 2805 return (EFBIG);
2806 2806 }
2807 2807 }
2808 2808
2809 2809 /* update the change attribute, if we have a write delegation */
2810 2810
2811 2811 mutex_enter(&rp->r_statev4_lock);
2812 2812 if (rp->r_deleg_type == OPEN_DELEGATE_WRITE)
2813 2813 rp->r_deleg_change++;
2814 2814
2815 2815 mutex_exit(&rp->r_statev4_lock);
2816 2816
2817 2817 if (nfs_rw_enter_sig(&rp->r_lkserlock, RW_READER, INTR4(vp)))
2818 2818 return (EINTR);
2819 2819
2820 2820 /*
2821 2821 * Bypass VM if caching has been disabled (e.g., locking) or if
2822 2822 * using client-side direct I/O and the file is not mmap'd and
2823 2823 * there are no cached pages.
2824 2824 */
2825 2825 if ((vp->v_flag & VNOCACHE) ||
2826 2826 (((rp->r_flags & R4DIRECTIO) || (mi->mi_flags & MI4_DIRECTIO)) &&
2827 2827 rp->r_mapcnt == 0 && rp->r_inmap == 0 && !nfs4_has_pages(vp))) {
2828 2828 size_t bufsize;
2829 2829 int count;
2830 2830 u_offset_t org_offset;
2831 2831 stable_how4 stab_comm;
2832 2832 nfs4_fwrite:
2833 2833 if (rp->r_flags & R4STALE) {
2834 2834 resid = uiop->uio_resid;
2835 2835 offset = uiop->uio_loffset;
2836 2836 error = rp->r_error;
2837 2837 /*
2838 2838 * A close may have cleared r_error, if so,
2839 2839 * propagate ESTALE error return properly
2840 2840 */
2841 2841 if (error == 0)
2842 2842 error = ESTALE;
2843 2843 goto bottom;
2844 2844 }
2845 2845
2846 2846 bufsize = MIN(uiop->uio_resid, mi->mi_stsize);
2847 2847 base = kmem_alloc(bufsize, KM_SLEEP);
2848 2848 do {
2849 2849 if (ioflag & FDSYNC)
2850 2850 stab_comm = DATA_SYNC4;
2851 2851 else
2852 2852 stab_comm = FILE_SYNC4;
2853 2853 resid = uiop->uio_resid;
2854 2854 offset = uiop->uio_loffset;
2855 2855 count = MIN(uiop->uio_resid, bufsize);
2856 2856 org_offset = uiop->uio_loffset;
2857 2857 error = uiomove(base, count, UIO_WRITE, uiop);
2858 2858 if (!error) {
2859 2859 error = nfs4write(vp, base, org_offset,
2860 2860 count, cr, &stab_comm);
2861 2861 if (!error) {
2862 2862 mutex_enter(&rp->r_statelock);
2863 2863 if (rp->r_size < uiop->uio_loffset)
2864 2864 rp->r_size = uiop->uio_loffset;
2865 2865 mutex_exit(&rp->r_statelock);
2866 2866 }
2867 2867 }
2868 2868 } while (!error && uiop->uio_resid > 0);
2869 2869 kmem_free(base, bufsize);
2870 2870 goto bottom;
2871 2871 }
2872 2872
2873 2873 bsize = vp->v_vfsp->vfs_bsize;
2874 2874
2875 2875 do {
2876 2876 off = uiop->uio_loffset & MAXBMASK; /* mapping offset */
2877 2877 on = uiop->uio_loffset & MAXBOFFSET; /* Relative offset */
2878 2878 n = MIN(MAXBSIZE - on, uiop->uio_resid);
2879 2879
2880 2880 resid = uiop->uio_resid;
2881 2881 offset = uiop->uio_loffset;
2882 2882
2883 2883 if (rp->r_flags & R4STALE) {
2884 2884 error = rp->r_error;
2885 2885 /*
2886 2886 * A close may have cleared r_error, if so,
2887 2887 * propagate ESTALE error return properly
2888 2888 */
2889 2889 if (error == 0)
2890 2890 error = ESTALE;
2891 2891 break;
2892 2892 }
2893 2893
2894 2894 /*
2895 2895 * Don't create dirty pages faster than they
2896 2896 * can be cleaned so that the system doesn't
2897 2897 * get imbalanced. If the async queue is
2898 2898 * maxed out, then wait for it to drain before
2899 2899 * creating more dirty pages. Also, wait for
2900 2900 * any threads doing pagewalks in the vop_getattr
2901 2901 * entry points so that they don't block for
2902 2902 * long periods.
2903 2903 */
2904 2904 mutex_enter(&rp->r_statelock);
2905 2905 while ((mi->mi_max_threads != 0 &&
2906 2906 rp->r_awcount > 2 * mi->mi_max_threads) ||
2907 2907 rp->r_gcount > 0) {
2908 2908 if (INTR4(vp)) {
2909 2909 klwp_t *lwp = ttolwp(curthread);
2910 2910
2911 2911 if (lwp != NULL)
2912 2912 lwp->lwp_nostop++;
2913 2913 if (!cv_wait_sig(&rp->r_cv, &rp->r_statelock)) {
2914 2914 mutex_exit(&rp->r_statelock);
2915 2915 if (lwp != NULL)
2916 2916 lwp->lwp_nostop--;
2917 2917 error = EINTR;
2918 2918 goto bottom;
2919 2919 }
2920 2920 if (lwp != NULL)
2921 2921 lwp->lwp_nostop--;
2922 2922 } else
2923 2923 cv_wait(&rp->r_cv, &rp->r_statelock);
2924 2924 }
2925 2925 mutex_exit(&rp->r_statelock);
2926 2926
2927 2927 /*
2928 2928 * Touch the page and fault it in if it is not in core
2929 2929 * before segmap_getmapflt or vpm_data_copy can lock it.
2930 2930 * This is to avoid the deadlock if the buffer is mapped
2931 2931 * to the same file through mmap which we want to write.
2932 2932 */
2933 2933 uio_prefaultpages((long)n, uiop);
2934 2934
2935 2935 if (vpm_enable) {
2936 2936 /*
2937 2937 * It will use kpm mappings, so no need to
2938 2938 * pass an address.
2939 2939 */
2940 2940 error = writerp4(rp, NULL, n, uiop, 0);
2941 2941 } else {
2942 2942 if (segmap_kpm) {
2943 2943 int pon = uiop->uio_loffset & PAGEOFFSET;
2944 2944 size_t pn = MIN(PAGESIZE - pon,
2945 2945 uiop->uio_resid);
2946 2946 int pagecreate;
2947 2947
2948 2948 mutex_enter(&rp->r_statelock);
2949 2949 pagecreate = (pon == 0) && (pn == PAGESIZE ||
2950 2950 uiop->uio_loffset + pn >= rp->r_size);
2951 2951 mutex_exit(&rp->r_statelock);
2952 2952
2953 2953 base = segmap_getmapflt(segkmap, vp, off + on,
2954 2954 pn, !pagecreate, S_WRITE);
2955 2955
2956 2956 error = writerp4(rp, base + pon, n, uiop,
2957 2957 pagecreate);
2958 2958
2959 2959 } else {
2960 2960 base = segmap_getmapflt(segkmap, vp, off + on,
2961 2961 n, 0, S_READ);
2962 2962 error = writerp4(rp, base + on, n, uiop, 0);
2963 2963 }
2964 2964 }
2965 2965
2966 2966 if (!error) {
2967 2967 if (mi->mi_flags & MI4_NOAC)
2968 2968 flags = SM_WRITE;
2969 2969 else if ((uiop->uio_loffset % bsize) == 0 ||
2970 2970 IS_SWAPVP(vp)) {
2971 2971 /*
2972 2972 * Have written a whole block.
2973 2973 * Start an asynchronous write
2974 2974 * and mark the buffer to
2975 2975 * indicate that it won't be
2976 2976 * needed again soon.
2977 2977 */
2978 2978 flags = SM_WRITE | SM_ASYNC | SM_DONTNEED;
2979 2979 } else
2980 2980 flags = 0;
2981 2981 if ((ioflag & (FSYNC|FDSYNC)) ||
2982 2982 (rp->r_flags & R4OUTOFSPACE)) {
2983 2983 flags &= ~SM_ASYNC;
2984 2984 flags |= SM_WRITE;
2985 2985 }
2986 2986 if (vpm_enable) {
2987 2987 error = vpm_sync_pages(vp, off, n, flags);
2988 2988 } else {
2989 2989 error = segmap_release(segkmap, base, flags);
2990 2990 }
2991 2991 } else {
2992 2992 if (vpm_enable) {
2993 2993 (void) vpm_sync_pages(vp, off, n, 0);
2994 2994 } else {
2995 2995 (void) segmap_release(segkmap, base, 0);
2996 2996 }
2997 2997 /*
2998 2998 * In the event that we got an access error while
2999 2999 * faulting in a page for a write-only file just
3000 3000 * force a write.
3001 3001 */
3002 3002 if (error == EACCES)
3003 3003 goto nfs4_fwrite;
3004 3004 }
3005 3005 } while (!error && uiop->uio_resid > 0);
3006 3006
3007 3007 bottom:
3008 3008 if (error) {
3009 3009 uiop->uio_resid = resid + remainder;
3010 3010 uiop->uio_loffset = offset;
3011 3011 } else {
3012 3012 uiop->uio_resid += remainder;
3013 3013
3014 3014 mutex_enter(&rp->r_statev4_lock);
3015 3015 if (rp->r_deleg_type == OPEN_DELEGATE_WRITE) {
3016 3016 gethrestime(&rp->r_attr.va_mtime);
3017 3017 rp->r_attr.va_ctime = rp->r_attr.va_mtime;
3018 3018 }
3019 3019 mutex_exit(&rp->r_statev4_lock);
3020 3020 }
3021 3021
3022 3022 nfs_rw_exit(&rp->r_lkserlock);
3023 3023
3024 3024 return (error);
3025 3025 }
3026 3026
3027 3027 /*
3028 3028 * Flags are composed of {B_ASYNC, B_INVAL, B_FREE, B_DONTNEED}
3029 3029 */
3030 3030 static int
3031 3031 nfs4_rdwrlbn(vnode_t *vp, page_t *pp, u_offset_t off, size_t len,
3032 3032 int flags, cred_t *cr)
3033 3033 {
3034 3034 struct buf *bp;
3035 3035 int error;
3036 3036 page_t *savepp;
3037 3037 uchar_t fsdata;
3038 3038 stable_how4 stab_comm;
3039 3039
3040 3040 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
3041 3041 bp = pageio_setup(pp, len, vp, flags);
3042 3042 ASSERT(bp != NULL);
3043 3043
3044 3044 /*
3045 3045 * pageio_setup should have set b_addr to 0. This
3046 3046 * is correct since we want to do I/O on a page
3047 3047 * boundary. bp_mapin will use this addr to calculate
3048 3048 * an offset, and then set b_addr to the kernel virtual
3049 3049 * address it allocated for us.
3050 3050 */
3051 3051 ASSERT(bp->b_un.b_addr == 0);
3052 3052
3053 3053 bp->b_edev = 0;
3054 3054 bp->b_dev = 0;
3055 3055 bp->b_lblkno = lbtodb(off);
3056 3056 bp->b_file = vp;
3057 3057 bp->b_offset = (offset_t)off;
3058 3058 bp_mapin(bp);
3059 3059
3060 3060 if ((flags & (B_WRITE|B_ASYNC)) == (B_WRITE|B_ASYNC) &&
3061 3061 freemem > desfree)
3062 3062 stab_comm = UNSTABLE4;
3063 3063 else
3064 3064 stab_comm = FILE_SYNC4;
3065 3065
3066 3066 error = nfs4_bio(bp, &stab_comm, cr, FALSE);
3067 3067
3068 3068 bp_mapout(bp);
3069 3069 pageio_done(bp);
3070 3070
3071 3071 if (stab_comm == UNSTABLE4)
3072 3072 fsdata = C_DELAYCOMMIT;
3073 3073 else
3074 3074 fsdata = C_NOCOMMIT;
3075 3075
3076 3076 savepp = pp;
3077 3077 do {
3078 3078 pp->p_fsdata = fsdata;
3079 3079 } while ((pp = pp->p_next) != savepp);
3080 3080
3081 3081 return (error);
3082 3082 }
3083 3083
3084 3084 /*
3085 3085 */
3086 3086 static int
3087 3087 nfs4rdwr_check_osid(vnode_t *vp, nfs4_error_t *ep, cred_t *cr)
3088 3088 {
3089 3089 nfs4_open_owner_t *oop;
3090 3090 nfs4_open_stream_t *osp;
3091 3091 rnode4_t *rp = VTOR4(vp);
3092 3092 mntinfo4_t *mi = VTOMI4(vp);
3093 3093 int reopen_needed;
3094 3094
3095 3095 ASSERT(nfs_zone() == mi->mi_zone);
3096 3096
3097 3097
3098 3098 oop = find_open_owner(cr, NFS4_PERM_CREATED, mi);
3099 3099 if (!oop)
3100 3100 return (EIO);
3101 3101
3102 3102 /* returns with 'os_sync_lock' held */
3103 3103 osp = find_open_stream(oop, rp);
3104 3104 if (!osp) {
3105 3105 open_owner_rele(oop);
3106 3106 return (EIO);
3107 3107 }
3108 3108
3109 3109 if (osp->os_failed_reopen) {
3110 3110 mutex_exit(&osp->os_sync_lock);
3111 3111 open_stream_rele(osp, rp);
3112 3112 open_owner_rele(oop);
3113 3113 return (EIO);
3114 3114 }
3115 3115
3116 3116 /*
3117 3117 * Determine whether a reopen is needed. If this
3118 3118 * is a delegation open stream, then the os_delegation bit
3119 3119 * should be set.
3120 3120 */
3121 3121
3122 3122 reopen_needed = osp->os_delegation;
3123 3123
3124 3124 mutex_exit(&osp->os_sync_lock);
3125 3125 open_owner_rele(oop);
3126 3126
3127 3127 if (reopen_needed) {
3128 3128 nfs4_error_zinit(ep);
3129 3129 nfs4_reopen(vp, osp, ep, CLAIM_NULL, FALSE, FALSE);
3130 3130 mutex_enter(&osp->os_sync_lock);
3131 3131 if (ep->error || ep->stat || osp->os_failed_reopen) {
3132 3132 mutex_exit(&osp->os_sync_lock);
3133 3133 open_stream_rele(osp, rp);
3134 3134 return (EIO);
3135 3135 }
3136 3136 mutex_exit(&osp->os_sync_lock);
3137 3137 }
3138 3138 open_stream_rele(osp, rp);
3139 3139
3140 3140 return (0);
3141 3141 }
3142 3142
3143 3143 /*
3144 3144 * Write to file. Writes to remote server in largest size
3145 3145 * chunks that the server can handle. Write is synchronous.
3146 3146 */
3147 3147 static int
3148 3148 nfs4write(vnode_t *vp, caddr_t base, u_offset_t offset, int count, cred_t *cr,
3149 3149 stable_how4 *stab_comm)
3150 3150 {
3151 3151 mntinfo4_t *mi;
3152 3152 COMPOUND4args_clnt args;
3153 3153 COMPOUND4res_clnt res;
3154 3154 WRITE4args *wargs;
3155 3155 WRITE4res *wres;
3156 3156 nfs_argop4 argop[2];
3157 3157 nfs_resop4 *resop;
3158 3158 int tsize;
3159 3159 stable_how4 stable;
3160 3160 rnode4_t *rp;
3161 3161 int doqueue = 1;
3162 3162 bool_t needrecov;
3163 3163 nfs4_recov_state_t recov_state;
3164 3164 nfs4_stateid_types_t sid_types;
3165 3165 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
3166 3166 int recov;
3167 3167
3168 3168 rp = VTOR4(vp);
3169 3169 mi = VTOMI4(vp);
3170 3170
3171 3171 ASSERT(nfs_zone() == mi->mi_zone);
3172 3172
3173 3173 stable = *stab_comm;
3174 3174 *stab_comm = FILE_SYNC4;
3175 3175
3176 3176 needrecov = FALSE;
3177 3177 recov_state.rs_flags = 0;
3178 3178 recov_state.rs_num_retry_despite_err = 0;
3179 3179 nfs4_init_stateid_types(&sid_types);
3180 3180
3181 3181 /* Is curthread the recovery thread? */
3182 3182 mutex_enter(&mi->mi_lock);
3183 3183 recov = (mi->mi_recovthread == curthread);
3184 3184 mutex_exit(&mi->mi_lock);
3185 3185
3186 3186 recov_retry:
3187 3187 args.ctag = TAG_WRITE;
3188 3188 args.array_len = 2;
3189 3189 args.array = argop;
3190 3190
3191 3191 if (!recov) {
3192 3192 e.error = nfs4_start_fop(VTOMI4(vp), vp, NULL, OH_WRITE,
3193 3193 &recov_state, NULL);
3194 3194 if (e.error)
3195 3195 return (e.error);
3196 3196 }
3197 3197
3198 3198 /* 0. putfh target fh */
3199 3199 argop[0].argop = OP_CPUTFH;
3200 3200 argop[0].nfs_argop4_u.opcputfh.sfh = rp->r_fh;
3201 3201
3202 3202 /* 1. write */
3203 3203 nfs4args_write(&argop[1], stable, rp, cr, &wargs, &sid_types);
3204 3204
3205 3205 do {
3206 3206
3207 3207 wargs->offset = (offset4)offset;
3208 3208 wargs->data_val = base;
3209 3209
3210 3210 if (mi->mi_io_kstats) {
3211 3211 mutex_enter(&mi->mi_lock);
3212 3212 kstat_runq_enter(KSTAT_IO_PTR(mi->mi_io_kstats));
3213 3213 mutex_exit(&mi->mi_lock);
3214 3214 }
3215 3215
3216 3216 if ((vp->v_flag & VNOCACHE) ||
3217 3217 (rp->r_flags & R4DIRECTIO) ||
3218 3218 (mi->mi_flags & MI4_DIRECTIO))
3219 3219 tsize = MIN(mi->mi_stsize, count);
3220 3220 else
3221 3221 tsize = MIN(mi->mi_curwrite, count);
3222 3222 wargs->data_len = (uint_t)tsize;
3223 3223 rfs4call(mi, &args, &res, cr, &doqueue, 0, &e);
3224 3224
3225 3225 if (mi->mi_io_kstats) {
3226 3226 mutex_enter(&mi->mi_lock);
3227 3227 kstat_runq_exit(KSTAT_IO_PTR(mi->mi_io_kstats));
3228 3228 mutex_exit(&mi->mi_lock);
3229 3229 }
3230 3230
3231 3231 if (!recov) {
3232 3232 needrecov = nfs4_needs_recovery(&e, FALSE, mi->mi_vfsp);
3233 3233 if (e.error && !needrecov) {
3234 3234 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_WRITE,
3235 3235 &recov_state, needrecov);
3236 3236 return (e.error);
3237 3237 }
3238 3238 } else {
3239 3239 if (e.error)
3240 3240 return (e.error);
3241 3241 }
3242 3242
3243 3243 /*
3244 3244 * Do handling of OLD_STATEID outside
3245 3245 * of the normal recovery framework.
3246 3246 *
3247 3247 * If write receives a BAD stateid error while using a
3248 3248 * delegation stateid, retry using the open stateid (if it
3249 3249 * exists). If it doesn't have an open stateid, reopen the
3250 3250 * file first, then retry.
3251 3251 */
3252 3252 if (!e.error && res.status == NFS4ERR_OLD_STATEID &&
3253 3253 sid_types.cur_sid_type != SPEC_SID) {
3254 3254 nfs4_save_stateid(&wargs->stateid, &sid_types);
3255 3255 if (!recov)
3256 3256 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_WRITE,
3257 3257 &recov_state, needrecov);
3258 3258 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3259 3259 goto recov_retry;
3260 3260 } else if (e.error == 0 && res.status == NFS4ERR_BAD_STATEID &&
3261 3261 sid_types.cur_sid_type == DEL_SID) {
3262 3262 nfs4_save_stateid(&wargs->stateid, &sid_types);
3263 3263 mutex_enter(&rp->r_statev4_lock);
3264 3264 rp->r_deleg_return_pending = TRUE;
3265 3265 mutex_exit(&rp->r_statev4_lock);
3266 3266 if (nfs4rdwr_check_osid(vp, &e, cr)) {
3267 3267 if (!recov)
3268 3268 nfs4_end_fop(mi, vp, NULL, OH_WRITE,
3269 3269 &recov_state, needrecov);
3270 3270 (void) xdr_free(xdr_COMPOUND4res_clnt,
3271 3271 (caddr_t)&res);
3272 3272 return (EIO);
3273 3273 }
3274 3274 if (!recov)
3275 3275 nfs4_end_fop(mi, vp, NULL, OH_WRITE,
3276 3276 &recov_state, needrecov);
3277 3277 /* hold needed for nfs4delegreturn_thread */
3278 3278 VN_HOLD(vp);
3279 3279 nfs4delegreturn_async(rp, (NFS4_DR_PUSH|NFS4_DR_REOPEN|
3280 3280 NFS4_DR_DISCARD), FALSE);
3281 3281 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3282 3282 goto recov_retry;
3283 3283 }
3284 3284
3285 3285 if (needrecov) {
3286 3286 bool_t abort;
3287 3287
3288 3288 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
3289 3289 "nfs4write: client got error %d, res.status %d"
3290 3290 ", so start recovery", e.error, res.status));
3291 3291
3292 3292 abort = nfs4_start_recovery(&e,
3293 3293 VTOMI4(vp), vp, NULL, &wargs->stateid,
3294 3294 NULL, OP_WRITE, NULL, NULL, NULL);
3295 3295 if (!e.error) {
3296 3296 e.error = geterrno4(res.status);
3297 3297 (void) xdr_free(xdr_COMPOUND4res_clnt,
3298 3298 (caddr_t)&res);
3299 3299 }
3300 3300 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_WRITE,
3301 3301 &recov_state, needrecov);
3302 3302 if (abort == FALSE)
3303 3303 goto recov_retry;
3304 3304 return (e.error);
3305 3305 }
3306 3306
3307 3307 if (res.status) {
3308 3308 e.error = geterrno4(res.status);
3309 3309 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3310 3310 if (!recov)
3311 3311 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_WRITE,
3312 3312 &recov_state, needrecov);
3313 3313 return (e.error);
3314 3314 }
3315 3315
3316 3316 resop = &res.array[1]; /* write res */
3317 3317 wres = &resop->nfs_resop4_u.opwrite;
3318 3318
3319 3319 if ((int)wres->count > tsize) {
3320 3320 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3321 3321
3322 3322 zcmn_err(getzoneid(), CE_WARN,
3323 3323 "nfs4write: server wrote %u, requested was %u",
3324 3324 (int)wres->count, tsize);
3325 3325 if (!recov)
3326 3326 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_WRITE,
3327 3327 &recov_state, needrecov);
3328 3328 return (EIO);
3329 3329 }
3330 3330 if (wres->committed == UNSTABLE4) {
3331 3331 *stab_comm = UNSTABLE4;
3332 3332 if (wargs->stable == DATA_SYNC4 ||
3333 3333 wargs->stable == FILE_SYNC4) {
3334 3334 (void) xdr_free(xdr_COMPOUND4res_clnt,
3335 3335 (caddr_t)&res);
3336 3336 zcmn_err(getzoneid(), CE_WARN,
3337 3337 "nfs4write: server %s did not commit "
3338 3338 "to stable storage",
3339 3339 rp->r_server->sv_hostname);
3340 3340 if (!recov)
3341 3341 nfs4_end_fop(VTOMI4(vp), vp, NULL,
3342 3342 OH_WRITE, &recov_state, needrecov);
3343 3343 return (EIO);
3344 3344 }
3345 3345 }
3346 3346
3347 3347 tsize = (int)wres->count;
3348 3348 count -= tsize;
3349 3349 base += tsize;
3350 3350 offset += tsize;
3351 3351 if (mi->mi_io_kstats) {
3352 3352 mutex_enter(&mi->mi_lock);
3353 3353 KSTAT_IO_PTR(mi->mi_io_kstats)->writes++;
3354 3354 KSTAT_IO_PTR(mi->mi_io_kstats)->nwritten +=
3355 3355 tsize;
3356 3356 mutex_exit(&mi->mi_lock);
3357 3357 }
3358 3358 lwp_stat_update(LWP_STAT_OUBLK, 1);
3359 3359 mutex_enter(&rp->r_statelock);
3360 3360 if (rp->r_flags & R4HAVEVERF) {
3361 3361 if (rp->r_writeverf != wres->writeverf) {
3362 3362 nfs4_set_mod(vp);
3363 3363 rp->r_writeverf = wres->writeverf;
3364 3364 }
3365 3365 } else {
3366 3366 rp->r_writeverf = wres->writeverf;
3367 3367 rp->r_flags |= R4HAVEVERF;
3368 3368 }
3369 3369 PURGE_ATTRCACHE4_LOCKED(rp);
3370 3370 rp->r_flags |= R4WRITEMODIFIED;
3371 3371 gethrestime(&rp->r_attr.va_mtime);
3372 3372 rp->r_attr.va_ctime = rp->r_attr.va_mtime;
3373 3373 mutex_exit(&rp->r_statelock);
3374 3374 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3375 3375 } while (count);
3376 3376
3377 3377 if (!recov)
3378 3378 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_WRITE, &recov_state,
3379 3379 needrecov);
3380 3380
3381 3381 return (e.error);
3382 3382 }
3383 3383
3384 3384 /*
3385 3385 * Read from a file. Reads data in largest chunks our interface can handle.
3386 3386 */
3387 3387 static int
3388 3388 nfs4read(vnode_t *vp, caddr_t base, offset_t offset, int count,
3389 3389 size_t *residp, cred_t *cr, bool_t async, struct uio *uiop)
3390 3390 {
3391 3391 mntinfo4_t *mi;
3392 3392 COMPOUND4args_clnt args;
3393 3393 COMPOUND4res_clnt res;
3394 3394 READ4args *rargs;
3395 3395 nfs_argop4 argop[2];
3396 3396 int tsize;
3397 3397 int doqueue;
3398 3398 rnode4_t *rp;
3399 3399 int data_len;
3400 3400 bool_t is_eof;
3401 3401 bool_t needrecov = FALSE;
3402 3402 nfs4_recov_state_t recov_state;
3403 3403 nfs4_stateid_types_t sid_types;
3404 3404 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
3405 3405
3406 3406 rp = VTOR4(vp);
3407 3407 mi = VTOMI4(vp);
3408 3408 doqueue = 1;
3409 3409
3410 3410 ASSERT(nfs_zone() == mi->mi_zone);
3411 3411
3412 3412 args.ctag = async ? TAG_READAHEAD : TAG_READ;
3413 3413
3414 3414 args.array_len = 2;
3415 3415 args.array = argop;
3416 3416
3417 3417 nfs4_init_stateid_types(&sid_types);
3418 3418
3419 3419 recov_state.rs_flags = 0;
3420 3420 recov_state.rs_num_retry_despite_err = 0;
3421 3421
3422 3422 recov_retry:
3423 3423 e.error = nfs4_start_fop(mi, vp, NULL, OH_READ,
3424 3424 &recov_state, NULL);
3425 3425 if (e.error)
3426 3426 return (e.error);
3427 3427
3428 3428 /* putfh target fh */
3429 3429 argop[0].argop = OP_CPUTFH;
3430 3430 argop[0].nfs_argop4_u.opcputfh.sfh = rp->r_fh;
3431 3431
3432 3432 /* read */
3433 3433 argop[1].argop = OP_READ;
3434 3434 rargs = &argop[1].nfs_argop4_u.opread;
3435 3435 rargs->stateid = nfs4_get_stateid(cr, rp, curproc->p_pidp->pid_id, mi,
3436 3436 OP_READ, &sid_types, async);
3437 3437
3438 3438 do {
3439 3439 if (mi->mi_io_kstats) {
3440 3440 mutex_enter(&mi->mi_lock);
3441 3441 kstat_runq_enter(KSTAT_IO_PTR(mi->mi_io_kstats));
3442 3442 mutex_exit(&mi->mi_lock);
3443 3443 }
3444 3444
3445 3445 NFS4_DEBUG(nfs4_client_call_debug, (CE_NOTE,
3446 3446 "nfs4read: %s call, rp %s",
3447 3447 needrecov ? "recov" : "first",
3448 3448 rnode4info(rp)));
3449 3449
3450 3450 if ((vp->v_flag & VNOCACHE) ||
3451 3451 (rp->r_flags & R4DIRECTIO) ||
3452 3452 (mi->mi_flags & MI4_DIRECTIO))
3453 3453 tsize = MIN(mi->mi_tsize, count);
3454 3454 else
3455 3455 tsize = MIN(mi->mi_curread, count);
3456 3456
3457 3457 rargs->offset = (offset4)offset;
3458 3458 rargs->count = (count4)tsize;
3459 3459 rargs->res_data_val_alt = NULL;
3460 3460 rargs->res_mblk = NULL;
3461 3461 rargs->res_uiop = NULL;
3462 3462 rargs->res_maxsize = 0;
3463 3463 rargs->wlist = NULL;
3464 3464
3465 3465 if (uiop)
3466 3466 rargs->res_uiop = uiop;
3467 3467 else
3468 3468 rargs->res_data_val_alt = base;
3469 3469 rargs->res_maxsize = tsize;
3470 3470
3471 3471 rfs4call(mi, &args, &res, cr, &doqueue, 0, &e);
3472 3472 #ifdef DEBUG
3473 3473 if (nfs4read_error_inject) {
3474 3474 res.status = nfs4read_error_inject;
3475 3475 nfs4read_error_inject = 0;
3476 3476 }
3477 3477 #endif
3478 3478
3479 3479 if (mi->mi_io_kstats) {
3480 3480 mutex_enter(&mi->mi_lock);
3481 3481 kstat_runq_exit(KSTAT_IO_PTR(mi->mi_io_kstats));
3482 3482 mutex_exit(&mi->mi_lock);
3483 3483 }
3484 3484
3485 3485 needrecov = nfs4_needs_recovery(&e, FALSE, mi->mi_vfsp);
3486 3486 if (e.error != 0 && !needrecov) {
3487 3487 nfs4_end_fop(mi, vp, NULL, OH_READ,
3488 3488 &recov_state, needrecov);
3489 3489 return (e.error);
3490 3490 }
3491 3491
3492 3492 /*
3493 3493 * Do proper retry for OLD and BAD stateid errors outside
3494 3494 * of the normal recovery framework. There are two differences
3495 3495 * between async and sync reads. The first is that we allow
3496 3496 * retry on BAD_STATEID for async reads, but not sync reads.
3497 3497 * The second is that we mark the file dead for a failed
3498 3498 * attempt with a special stateid for sync reads, but just
3499 3499 * return EIO for async reads.
3500 3500 *
3501 3501 * If a sync read receives a BAD stateid error while using a
3502 3502 * delegation stateid, retry using the open stateid (if it
3503 3503 * exists). If it doesn't have an open stateid, reopen the
3504 3504 * file first, then retry.
3505 3505 */
3506 3506 if (e.error == 0 && (res.status == NFS4ERR_OLD_STATEID ||
3507 3507 res.status == NFS4ERR_BAD_STATEID) && async) {
3508 3508 nfs4_end_fop(mi, vp, NULL, OH_READ,
3509 3509 &recov_state, needrecov);
3510 3510 if (sid_types.cur_sid_type == SPEC_SID) {
3511 3511 (void) xdr_free(xdr_COMPOUND4res_clnt,
3512 3512 (caddr_t)&res);
3513 3513 return (EIO);
3514 3514 }
3515 3515 nfs4_save_stateid(&rargs->stateid, &sid_types);
3516 3516 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3517 3517 goto recov_retry;
3518 3518 } else if (e.error == 0 && res.status == NFS4ERR_OLD_STATEID &&
3519 3519 !async && sid_types.cur_sid_type != SPEC_SID) {
3520 3520 nfs4_save_stateid(&rargs->stateid, &sid_types);
3521 3521 nfs4_end_fop(mi, vp, NULL, OH_READ,
3522 3522 &recov_state, needrecov);
3523 3523 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3524 3524 goto recov_retry;
3525 3525 } else if (e.error == 0 && res.status == NFS4ERR_BAD_STATEID &&
3526 3526 sid_types.cur_sid_type == DEL_SID) {
3527 3527 nfs4_save_stateid(&rargs->stateid, &sid_types);
3528 3528 mutex_enter(&rp->r_statev4_lock);
3529 3529 rp->r_deleg_return_pending = TRUE;
3530 3530 mutex_exit(&rp->r_statev4_lock);
3531 3531 if (nfs4rdwr_check_osid(vp, &e, cr)) {
3532 3532 nfs4_end_fop(mi, vp, NULL, OH_READ,
3533 3533 &recov_state, needrecov);
3534 3534 (void) xdr_free(xdr_COMPOUND4res_clnt,
3535 3535 (caddr_t)&res);
3536 3536 return (EIO);
3537 3537 }
3538 3538 nfs4_end_fop(mi, vp, NULL, OH_READ,
3539 3539 &recov_state, needrecov);
3540 3540 /* hold needed for nfs4delegreturn_thread */
3541 3541 VN_HOLD(vp);
3542 3542 nfs4delegreturn_async(rp, (NFS4_DR_PUSH|NFS4_DR_REOPEN|
3543 3543 NFS4_DR_DISCARD), FALSE);
3544 3544 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3545 3545 goto recov_retry;
3546 3546 }
3547 3547 if (needrecov) {
3548 3548 bool_t abort;
3549 3549
3550 3550 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
3551 3551 "nfs4read: initiating recovery\n"));
3552 3552 abort = nfs4_start_recovery(&e,
3553 3553 mi, vp, NULL, &rargs->stateid,
3554 3554 NULL, OP_READ, NULL, NULL, NULL);
3555 3555 nfs4_end_fop(mi, vp, NULL, OH_READ,
3556 3556 &recov_state, needrecov);
3557 3557 /*
3558 3558 * Do not retry if we got OLD_STATEID using a special
3559 3559 * stateid. This avoids looping with a broken server.
3560 3560 */
3561 3561 if (e.error == 0 && res.status == NFS4ERR_OLD_STATEID &&
3562 3562 sid_types.cur_sid_type == SPEC_SID)
3563 3563 abort = TRUE;
3564 3564
3565 3565 if (abort == FALSE) {
3566 3566 /*
3567 3567 * Need to retry all possible stateids in
3568 3568 * case the recovery error wasn't stateid
3569 3569 * related or the stateids have become
3570 3570 * stale (server reboot).
3571 3571 */
3572 3572 nfs4_init_stateid_types(&sid_types);
3573 3573 (void) xdr_free(xdr_COMPOUND4res_clnt,
3574 3574 (caddr_t)&res);
3575 3575 goto recov_retry;
3576 3576 }
3577 3577
3578 3578 if (!e.error) {
3579 3579 e.error = geterrno4(res.status);
3580 3580 (void) xdr_free(xdr_COMPOUND4res_clnt,
3581 3581 (caddr_t)&res);
3582 3582 }
3583 3583 return (e.error);
3584 3584 }
3585 3585
3586 3586 if (res.status) {
3587 3587 e.error = geterrno4(res.status);
3588 3588 nfs4_end_fop(mi, vp, NULL, OH_READ,
3589 3589 &recov_state, needrecov);
3590 3590 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3591 3591 return (e.error);
3592 3592 }
3593 3593
3594 3594 data_len = res.array[1].nfs_resop4_u.opread.data_len;
3595 3595 count -= data_len;
3596 3596 if (base)
3597 3597 base += data_len;
3598 3598 offset += data_len;
3599 3599 if (mi->mi_io_kstats) {
3600 3600 mutex_enter(&mi->mi_lock);
3601 3601 KSTAT_IO_PTR(mi->mi_io_kstats)->reads++;
3602 3602 KSTAT_IO_PTR(mi->mi_io_kstats)->nread += data_len;
3603 3603 mutex_exit(&mi->mi_lock);
3604 3604 }
3605 3605 lwp_stat_update(LWP_STAT_INBLK, 1);
3606 3606 is_eof = res.array[1].nfs_resop4_u.opread.eof;
3607 3607 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
3608 3608
3609 3609 } while (count && !is_eof);
3610 3610
3611 3611 *residp = count;
3612 3612
3613 3613 nfs4_end_fop(mi, vp, NULL, OH_READ, &recov_state, needrecov);
3614 3614
3615 3615 return (e.error);
3616 3616 }
3617 3617
3618 3618 /* ARGSUSED */
3619 3619 static int
3620 3620 nfs4_ioctl(vnode_t *vp, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp,
3621 3621 caller_context_t *ct)
3622 3622 {
3623 3623 if (nfs_zone() != VTOMI4(vp)->mi_zone)
3624 3624 return (EIO);
3625 3625 switch (cmd) {
3626 3626 case _FIODIRECTIO:
3627 3627 return (nfs4_directio(vp, (int)arg, cr));
3628 3628 default:
3629 3629 return (ENOTTY);
3630 3630 }
3631 3631 }
3632 3632
3633 3633 /* ARGSUSED */
3634 3634 int
3635 3635 nfs4_getattr(vnode_t *vp, struct vattr *vap, int flags, cred_t *cr,
3636 3636 caller_context_t *ct)
3637 3637 {
3638 3638 int error;
3639 3639 rnode4_t *rp = VTOR4(vp);
3640 3640
3641 3641 if (nfs_zone() != VTOMI4(vp)->mi_zone)
3642 3642 return (EIO);
3643 3643 /*
3644 3644 * If it has been specified that the return value will
3645 3645 * just be used as a hint, and we are only being asked
3646 3646 * for size, fsid or rdevid, then return the client's
3647 3647 * notion of these values without checking to make sure
3648 3648 * that the attribute cache is up to date.
3649 3649 * The whole point is to avoid an over the wire GETATTR
3650 3650 * call.
3651 3651 */
3652 3652 if (flags & ATTR_HINT) {
3653 3653 if (!(vap->va_mask & ~(AT_SIZE | AT_FSID | AT_RDEV))) {
3654 3654 mutex_enter(&rp->r_statelock);
3655 3655 if (vap->va_mask & AT_SIZE)
3656 3656 vap->va_size = rp->r_size;
3657 3657 if (vap->va_mask & AT_FSID)
3658 3658 vap->va_fsid = rp->r_attr.va_fsid;
3659 3659 if (vap->va_mask & AT_RDEV)
3660 3660 vap->va_rdev = rp->r_attr.va_rdev;
3661 3661 mutex_exit(&rp->r_statelock);
3662 3662 return (0);
3663 3663 }
3664 3664 }
3665 3665
3666 3666 /*
3667 3667 * Only need to flush pages if asking for the mtime
3668 3668 * and if there any dirty pages or any outstanding
3669 3669 * asynchronous (write) requests for this file.
3670 3670 */
3671 3671 if (vap->va_mask & AT_MTIME) {
3672 3672 rp = VTOR4(vp);
3673 3673 if (nfs4_has_pages(vp)) {
3674 3674 mutex_enter(&rp->r_statev4_lock);
3675 3675 if (rp->r_deleg_type != OPEN_DELEGATE_WRITE) {
3676 3676 mutex_exit(&rp->r_statev4_lock);
3677 3677 if (rp->r_flags & R4DIRTY ||
3678 3678 rp->r_awcount > 0) {
3679 3679 mutex_enter(&rp->r_statelock);
3680 3680 rp->r_gcount++;
3681 3681 mutex_exit(&rp->r_statelock);
3682 3682 error =
3683 3683 nfs4_putpage(vp, (u_offset_t)0,
3684 3684 0, 0, cr, NULL);
3685 3685 mutex_enter(&rp->r_statelock);
3686 3686 if (error && (error == ENOSPC ||
3687 3687 error == EDQUOT)) {
3688 3688 if (!rp->r_error)
3689 3689 rp->r_error = error;
3690 3690 }
3691 3691 if (--rp->r_gcount == 0)
3692 3692 cv_broadcast(&rp->r_cv);
3693 3693 mutex_exit(&rp->r_statelock);
3694 3694 }
3695 3695 } else {
3696 3696 mutex_exit(&rp->r_statev4_lock);
3697 3697 }
3698 3698 }
3699 3699 }
3700 3700 return (nfs4getattr(vp, vap, cr));
3701 3701 }
3702 3702
3703 3703 int
3704 3704 nfs4_compare_modes(mode_t from_server, mode_t on_client)
3705 3705 {
3706 3706 /*
3707 3707 * If these are the only two bits cleared
3708 3708 * on the server then return 0 (OK) else
3709 3709 * return 1 (BAD).
3710 3710 */
3711 3711 on_client &= ~(S_ISUID|S_ISGID);
3712 3712 if (on_client == from_server)
3713 3713 return (0);
3714 3714 else
3715 3715 return (1);
3716 3716 }
3717 3717
3718 3718 /*ARGSUSED4*/
3719 3719 static int
3720 3720 nfs4_setattr(vnode_t *vp, struct vattr *vap, int flags, cred_t *cr,
3721 3721 caller_context_t *ct)
3722 3722 {
3723 3723 int error;
3724 3724
3725 3725 if (vap->va_mask & AT_NOSET)
3726 3726 return (EINVAL);
3727 3727
3728 3728 if (nfs_zone() != VTOMI4(vp)->mi_zone)
3729 3729 return (EIO);
3730 3730
3731 3731 /*
3732 3732 * Don't call secpolicy_vnode_setattr, the client cannot
3733 3733 * use its cached attributes to make security decisions
3734 3734 * as the server may be faking mode bits or mapping uid/gid.
3735 3735 * Always just let the server to the checking.
3736 3736 * If we provide the ability to remove basic priviledges
3737 3737 * to setattr (e.g. basic without chmod) then we will
3738 3738 * need to add a check here before calling the server.
3739 3739 */
3740 3740 error = nfs4setattr(vp, vap, flags, cr, NULL);
3741 3741
3742 3742 if (error == 0 && (vap->va_mask & AT_SIZE)) {
3743 3743 if (vap->va_size == 0) {
3744 3744 vnevent_truncate(vp, ct);
3745 3745 } else {
3746 3746 vnevent_resize(vp, ct);
3747 3747 }
3748 3748 }
3749 3749
3750 3750 return (error);
3751 3751 }
3752 3752
3753 3753 /*
3754 3754 * To replace the "guarded" version 3 setattr, we use two types of compound
3755 3755 * setattr requests:
3756 3756 * 1. The "normal" setattr, used when the size of the file isn't being
3757 3757 * changed - { Putfh <fh>; Setattr; Getattr }/
3758 3758 * 2. If the size is changed, precede Setattr with: Getattr; Verify
3759 3759 * with only ctime as the argument. If the server ctime differs from
3760 3760 * what is cached on the client, the verify will fail, but we would
3761 3761 * already have the ctime from the preceding getattr, so just set it
3762 3762 * and retry. Thus the compound here is - { Putfh <fh>; Getattr; Verify;
3763 3763 * Setattr; Getattr }.
3764 3764 *
3765 3765 * The vsecattr_t * input parameter will be non-NULL if ACLs are being set in
3766 3766 * this setattr and NULL if they are not.
3767 3767 */
3768 3768 static int
3769 3769 nfs4setattr(vnode_t *vp, struct vattr *vap, int flags, cred_t *cr,
3770 3770 vsecattr_t *vsap)
3771 3771 {
3772 3772 COMPOUND4args_clnt args;
3773 3773 COMPOUND4res_clnt res, *resp = NULL;
3774 3774 nfs4_ga_res_t *garp = NULL;
3775 3775 int numops = 3; /* { Putfh; Setattr; Getattr } */
3776 3776 nfs_argop4 argop[5];
3777 3777 int verify_argop = -1;
3778 3778 int setattr_argop = 1;
3779 3779 nfs_resop4 *resop;
3780 3780 vattr_t va;
3781 3781 rnode4_t *rp;
3782 3782 int doqueue = 1;
3783 3783 uint_t mask = vap->va_mask;
3784 3784 mode_t omode;
3785 3785 vsecattr_t *vsp;
3786 3786 timestruc_t ctime;
3787 3787 bool_t needrecov = FALSE;
3788 3788 nfs4_recov_state_t recov_state;
3789 3789 nfs4_stateid_types_t sid_types;
3790 3790 stateid4 stateid;
3791 3791 hrtime_t t;
3792 3792 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
3793 3793 servinfo4_t *svp;
3794 3794 bitmap4 supp_attrs;
3795 3795
3796 3796 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
3797 3797 rp = VTOR4(vp);
3798 3798 nfs4_init_stateid_types(&sid_types);
3799 3799
3800 3800 /*
3801 3801 * Only need to flush pages if there are any pages and
3802 3802 * if the file is marked as dirty in some fashion. The
3803 3803 * file must be flushed so that we can accurately
3804 3804 * determine the size of the file and the cached data
3805 3805 * after the SETATTR returns. A file is considered to
3806 3806 * be dirty if it is either marked with R4DIRTY, has
3807 3807 * outstanding i/o's active, or is mmap'd. In this
3808 3808 * last case, we can't tell whether there are dirty
3809 3809 * pages, so we flush just to be sure.
3810 3810 */
3811 3811 if (nfs4_has_pages(vp) &&
3812 3812 ((rp->r_flags & R4DIRTY) ||
3813 3813 rp->r_count > 0 ||
3814 3814 rp->r_mapcnt > 0)) {
3815 3815 ASSERT(vp->v_type != VCHR);
3816 3816 e.error = nfs4_putpage(vp, (offset_t)0, 0, 0, cr, NULL);
3817 3817 if (e.error && (e.error == ENOSPC || e.error == EDQUOT)) {
3818 3818 mutex_enter(&rp->r_statelock);
3819 3819 if (!rp->r_error)
3820 3820 rp->r_error = e.error;
3821 3821 mutex_exit(&rp->r_statelock);
3822 3822 }
3823 3823 }
3824 3824
3825 3825 if (mask & AT_SIZE) {
3826 3826 /*
3827 3827 * Verification setattr compound for non-deleg AT_SIZE:
3828 3828 * { Putfh; Getattr; Verify; Setattr; Getattr }
3829 3829 * Set ctime local here (outside the do_again label)
3830 3830 * so that subsequent retries (after failed VERIFY)
3831 3831 * will use ctime from GETATTR results (from failed
3832 3832 * verify compound) as VERIFY arg.
3833 3833 * If file has delegation, then VERIFY(time_metadata)
3834 3834 * is of little added value, so don't bother.
3835 3835 */
3836 3836 mutex_enter(&rp->r_statev4_lock);
3837 3837 if (rp->r_deleg_type == OPEN_DELEGATE_NONE ||
3838 3838 rp->r_deleg_return_pending) {
3839 3839 numops = 5;
3840 3840 ctime = rp->r_attr.va_ctime;
3841 3841 }
3842 3842 mutex_exit(&rp->r_statev4_lock);
3843 3843 }
3844 3844
3845 3845 recov_state.rs_flags = 0;
3846 3846 recov_state.rs_num_retry_despite_err = 0;
3847 3847
3848 3848 args.ctag = TAG_SETATTR;
3849 3849 do_again:
3850 3850 recov_retry:
3851 3851 setattr_argop = numops - 2;
3852 3852
3853 3853 args.array = argop;
3854 3854 args.array_len = numops;
3855 3855
3856 3856 e.error = nfs4_start_op(VTOMI4(vp), vp, NULL, &recov_state);
3857 3857 if (e.error)
3858 3858 return (e.error);
3859 3859
3860 3860
3861 3861 /* putfh target fh */
3862 3862 argop[0].argop = OP_CPUTFH;
3863 3863 argop[0].nfs_argop4_u.opcputfh.sfh = rp->r_fh;
3864 3864
3865 3865 if (numops == 5) {
3866 3866 /*
3867 3867 * We only care about the ctime, but need to get mtime
3868 3868 * and size for proper cache update.
3869 3869 */
3870 3870 /* getattr */
3871 3871 argop[1].argop = OP_GETATTR;
3872 3872 argop[1].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
3873 3873 argop[1].nfs_argop4_u.opgetattr.mi = VTOMI4(vp);
3874 3874
3875 3875 /* verify - set later in loop */
3876 3876 verify_argop = 2;
3877 3877 }
3878 3878
3879 3879 /* setattr */
3880 3880 svp = rp->r_server;
3881 3881 (void) nfs_rw_enter_sig(&svp->sv_lock, RW_READER, 0);
3882 3882 supp_attrs = svp->sv_supp_attrs;
3883 3883 nfs_rw_exit(&svp->sv_lock);
3884 3884
3885 3885 nfs4args_setattr(&argop[setattr_argop], vap, vsap, flags, rp, cr,
3886 3886 supp_attrs, &e.error, &sid_types);
3887 3887 stateid = argop[setattr_argop].nfs_argop4_u.opsetattr.stateid;
3888 3888 if (e.error) {
3889 3889 /* req time field(s) overflow - return immediately */
3890 3890 nfs4_end_op(VTOMI4(vp), vp, NULL, &recov_state, needrecov);
3891 3891 nfs4_fattr4_free(&argop[setattr_argop].nfs_argop4_u.
3892 3892 opsetattr.obj_attributes);
3893 3893 return (e.error);
3894 3894 }
3895 3895 omode = rp->r_attr.va_mode;
3896 3896
3897 3897 /* getattr */
3898 3898 argop[numops-1].argop = OP_GETATTR;
3899 3899 argop[numops-1].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
3900 3900 /*
3901 3901 * If we are setting the ACL (indicated only by vsap != NULL), request
3902 3902 * the ACL in this getattr. The ACL returned from this getattr will be
3903 3903 * used in updating the ACL cache.
3904 3904 */
3905 3905 if (vsap != NULL)
3906 3906 argop[numops-1].nfs_argop4_u.opgetattr.attr_request |=
3907 3907 FATTR4_ACL_MASK;
3908 3908 argop[numops-1].nfs_argop4_u.opgetattr.mi = VTOMI4(vp);
3909 3909
3910 3910 /*
3911 3911 * setattr iterates if the object size is set and the cached ctime
3912 3912 * does not match the file ctime. In that case, verify the ctime first.
3913 3913 */
3914 3914
3915 3915 do {
3916 3916 if (verify_argop != -1) {
3917 3917 /*
3918 3918 * Verify that the ctime match before doing setattr.
3919 3919 */
3920 3920 va.va_mask = AT_CTIME;
3921 3921 va.va_ctime = ctime;
3922 3922 svp = rp->r_server;
3923 3923 (void) nfs_rw_enter_sig(&svp->sv_lock, RW_READER, 0);
3924 3924 supp_attrs = svp->sv_supp_attrs;
3925 3925 nfs_rw_exit(&svp->sv_lock);
3926 3926 e.error = nfs4args_verify(&argop[verify_argop], &va,
3927 3927 OP_VERIFY, supp_attrs);
3928 3928 if (e.error) {
3929 3929 /* req time field(s) overflow - return */
3930 3930 nfs4_end_op(VTOMI4(vp), vp, NULL, &recov_state,
3931 3931 needrecov);
3932 3932 break;
3933 3933 }
3934 3934 }
3935 3935
3936 3936 doqueue = 1;
3937 3937
3938 3938 t = gethrtime();
3939 3939
3940 3940 rfs4call(VTOMI4(vp), &args, &res, cr, &doqueue, 0, &e);
3941 3941
3942 3942 /*
3943 3943 * Purge the access cache and ACL cache if changing either the
3944 3944 * owner of the file, the group owner, or the mode. These may
3945 3945 * change the access permissions of the file, so purge old
3946 3946 * information and start over again.
3947 3947 */
3948 3948 if (mask & (AT_UID | AT_GID | AT_MODE)) {
3949 3949 (void) nfs4_access_purge_rp(rp);
3950 3950 if (rp->r_secattr != NULL) {
3951 3951 mutex_enter(&rp->r_statelock);
3952 3952 vsp = rp->r_secattr;
3953 3953 rp->r_secattr = NULL;
3954 3954 mutex_exit(&rp->r_statelock);
3955 3955 if (vsp != NULL)
3956 3956 nfs4_acl_free_cache(vsp);
3957 3957 }
3958 3958 }
3959 3959
3960 3960 /*
3961 3961 * If res.array_len == numops, then everything succeeded,
3962 3962 * except for possibly the final getattr. If only the
3963 3963 * last getattr failed, give up, and don't try recovery.
3964 3964 */
3965 3965 if (res.array_len == numops) {
3966 3966 nfs4_end_op(VTOMI4(vp), vp, NULL, &recov_state,
3967 3967 needrecov);
3968 3968 if (! e.error)
3969 3969 resp = &res;
3970 3970 break;
3971 3971 }
3972 3972
3973 3973 /*
3974 3974 * if either rpc call failed or completely succeeded - done
3975 3975 */
3976 3976 needrecov = nfs4_needs_recovery(&e, FALSE, vp->v_vfsp);
3977 3977 if (e.error) {
3978 3978 PURGE_ATTRCACHE4(vp);
3979 3979 if (!needrecov) {
3980 3980 nfs4_end_op(VTOMI4(vp), vp, NULL, &recov_state,
3981 3981 needrecov);
3982 3982 break;
3983 3983 }
3984 3984 }
3985 3985
3986 3986 /*
3987 3987 * Do proper retry for OLD_STATEID outside of the normal
3988 3988 * recovery framework.
3989 3989 */
3990 3990 if (e.error == 0 && res.status == NFS4ERR_OLD_STATEID &&
3991 3991 sid_types.cur_sid_type != SPEC_SID &&
3992 3992 sid_types.cur_sid_type != NO_SID) {
3993 3993 nfs4_end_op(VTOMI4(vp), vp, NULL, &recov_state,
3994 3994 needrecov);
3995 3995 nfs4_save_stateid(&stateid, &sid_types);
3996 3996 nfs4_fattr4_free(&argop[setattr_argop].nfs_argop4_u.
3997 3997 opsetattr.obj_attributes);
3998 3998 if (verify_argop != -1) {
3999 3999 nfs4args_verify_free(&argop[verify_argop]);
4000 4000 verify_argop = -1;
4001 4001 }
4002 4002 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
4003 4003 goto recov_retry;
4004 4004 }
4005 4005
4006 4006 if (needrecov) {
4007 4007 bool_t abort;
4008 4008
4009 4009 abort = nfs4_start_recovery(&e,
4010 4010 VTOMI4(vp), vp, NULL, NULL, NULL,
4011 4011 OP_SETATTR, NULL, NULL, NULL);
4012 4012 nfs4_end_op(VTOMI4(vp), vp, NULL, &recov_state,
4013 4013 needrecov);
4014 4014 /*
4015 4015 * Do not retry if we failed with OLD_STATEID using
4016 4016 * a special stateid. This is done to avoid looping
4017 4017 * with a broken server.
4018 4018 */
4019 4019 if (e.error == 0 && res.status == NFS4ERR_OLD_STATEID &&
4020 4020 (sid_types.cur_sid_type == SPEC_SID ||
4021 4021 sid_types.cur_sid_type == NO_SID))
4022 4022 abort = TRUE;
4023 4023 if (!e.error) {
4024 4024 if (res.status == NFS4ERR_BADOWNER)
4025 4025 nfs4_log_badowner(VTOMI4(vp),
4026 4026 OP_SETATTR);
4027 4027
4028 4028 e.error = geterrno4(res.status);
4029 4029 (void) xdr_free(xdr_COMPOUND4res_clnt,
4030 4030 (caddr_t)&res);
4031 4031 }
4032 4032 nfs4_fattr4_free(&argop[setattr_argop].nfs_argop4_u.
4033 4033 opsetattr.obj_attributes);
4034 4034 if (verify_argop != -1) {
4035 4035 nfs4args_verify_free(&argop[verify_argop]);
4036 4036 verify_argop = -1;
4037 4037 }
4038 4038 if (abort == FALSE) {
4039 4039 /*
4040 4040 * Need to retry all possible stateids in
4041 4041 * case the recovery error wasn't stateid
4042 4042 * related or the stateids have become
4043 4043 * stale (server reboot).
4044 4044 */
4045 4045 nfs4_init_stateid_types(&sid_types);
4046 4046 goto recov_retry;
4047 4047 }
4048 4048 return (e.error);
4049 4049 }
4050 4050
4051 4051 /*
4052 4052 * Need to call nfs4_end_op before nfs4getattr to
4053 4053 * avoid potential nfs4_start_op deadlock. See RFE
4054 4054 * 4777612. Calls to nfs4_invalidate_pages() and
4055 4055 * nfs4_purge_stale_fh() might also generate over the
4056 4056 * wire calls which my cause nfs4_start_op() deadlock.
4057 4057 */
4058 4058 nfs4_end_op(VTOMI4(vp), vp, NULL, &recov_state, needrecov);
4059 4059
4060 4060 /*
4061 4061 * Check to update lease.
4062 4062 */
4063 4063 resp = &res;
4064 4064 if (res.status == NFS4_OK) {
4065 4065 break;
4066 4066 }
4067 4067
4068 4068 /*
4069 4069 * Check if verify failed to see if try again
4070 4070 */
4071 4071 if ((verify_argop == -1) || (res.array_len != 3)) {
4072 4072 /*
4073 4073 * can't continue...
4074 4074 */
4075 4075 if (res.status == NFS4ERR_BADOWNER)
4076 4076 nfs4_log_badowner(VTOMI4(vp), OP_SETATTR);
4077 4077
4078 4078 e.error = geterrno4(res.status);
4079 4079 } else {
4080 4080 /*
4081 4081 * When the verify request fails, the client ctime is
4082 4082 * not in sync with the server. This is the same as
4083 4083 * the version 3 "not synchronized" error, and we
4084 4084 * handle it in a similar manner (XXX do we need to???).
4085 4085 * Use the ctime returned in the first getattr for
4086 4086 * the input to the next verify.
4087 4087 * If we couldn't get the attributes, then we give up
4088 4088 * because we can't complete the operation as required.
4089 4089 */
4090 4090 garp = &res.array[1].nfs_resop4_u.opgetattr.ga_res;
4091 4091 }
4092 4092 if (e.error) {
4093 4093 PURGE_ATTRCACHE4(vp);
4094 4094 nfs4_purge_stale_fh(e.error, vp, cr);
4095 4095 } else {
4096 4096 /*
4097 4097 * retry with a new verify value
4098 4098 */
4099 4099 ctime = garp->n4g_va.va_ctime;
4100 4100 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
4101 4101 resp = NULL;
4102 4102 }
4103 4103 if (!e.error) {
4104 4104 nfs4_fattr4_free(&argop[setattr_argop].nfs_argop4_u.
4105 4105 opsetattr.obj_attributes);
4106 4106 if (verify_argop != -1) {
4107 4107 nfs4args_verify_free(&argop[verify_argop]);
4108 4108 verify_argop = -1;
4109 4109 }
4110 4110 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
4111 4111 goto do_again;
4112 4112 }
4113 4113 } while (!e.error);
4114 4114
4115 4115 if (e.error) {
4116 4116 /*
4117 4117 * If we are here, rfs4call has an irrecoverable error - return
4118 4118 */
4119 4119 nfs4_fattr4_free(&argop[setattr_argop].nfs_argop4_u.
4120 4120 opsetattr.obj_attributes);
4121 4121 if (verify_argop != -1) {
4122 4122 nfs4args_verify_free(&argop[verify_argop]);
4123 4123 verify_argop = -1;
4124 4124 }
4125 4125 if (resp)
4126 4126 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
4127 4127 return (e.error);
4128 4128 }
4129 4129
4130 4130
4131 4131
4132 4132 /*
4133 4133 * If changing the size of the file, invalidate
4134 4134 * any local cached data which is no longer part
4135 4135 * of the file. We also possibly invalidate the
4136 4136 * last page in the file. We could use
4137 4137 * pvn_vpzero(), but this would mark the page as
4138 4138 * modified and require it to be written back to
4139 4139 * the server for no particularly good reason.
4140 4140 * This way, if we access it, then we bring it
4141 4141 * back in. A read should be cheaper than a
4142 4142 * write.
4143 4143 */
4144 4144 if (mask & AT_SIZE) {
4145 4145 nfs4_invalidate_pages(vp, (vap->va_size & PAGEMASK), cr);
4146 4146 }
4147 4147
4148 4148 /* either no error or one of the postop getattr failed */
4149 4149
4150 4150 /*
4151 4151 * XXX Perform a simplified version of wcc checking. Instead of
4152 4152 * have another getattr to get pre-op, just purge cache if
4153 4153 * any of the ops prior to and including the getattr failed.
4154 4154 * If the getattr succeeded then update the attrcache accordingly.
4155 4155 */
4156 4156
4157 4157 garp = NULL;
4158 4158 if (res.status == NFS4_OK) {
4159 4159 /*
4160 4160 * Last getattr
4161 4161 */
4162 4162 resop = &res.array[numops - 1];
4163 4163 garp = &resop->nfs_resop4_u.opgetattr.ga_res;
4164 4164 }
4165 4165 /*
4166 4166 * In certain cases, nfs4_update_attrcache() will purge the attrcache,
4167 4167 * rather than filling it. See the function itself for details.
4168 4168 */
4169 4169 e.error = nfs4_update_attrcache(res.status, garp, t, vp, cr);
4170 4170 if (garp != NULL) {
4171 4171 if (garp->n4g_resbmap & FATTR4_ACL_MASK) {
4172 4172 nfs4_acl_fill_cache(rp, &garp->n4g_vsa);
4173 4173 vs_ace4_destroy(&garp->n4g_vsa);
4174 4174 } else {
4175 4175 if (vsap != NULL) {
4176 4176 /*
4177 4177 * The ACL was supposed to be set and to be
4178 4178 * returned in the last getattr of this
4179 4179 * compound, but for some reason the getattr
4180 4180 * result doesn't contain the ACL. In this
4181 4181 * case, purge the ACL cache.
4182 4182 */
4183 4183 if (rp->r_secattr != NULL) {
4184 4184 mutex_enter(&rp->r_statelock);
4185 4185 vsp = rp->r_secattr;
4186 4186 rp->r_secattr = NULL;
4187 4187 mutex_exit(&rp->r_statelock);
4188 4188 if (vsp != NULL)
4189 4189 nfs4_acl_free_cache(vsp);
4190 4190 }
4191 4191 }
4192 4192 }
4193 4193 }
4194 4194
4195 4195 if (res.status == NFS4_OK && (mask & AT_SIZE)) {
4196 4196 /*
4197 4197 * Set the size, rather than relying on getting it updated
4198 4198 * via a GETATTR. With delegations the client tries to
4199 4199 * suppress GETATTR calls.
4200 4200 */
4201 4201 mutex_enter(&rp->r_statelock);
4202 4202 rp->r_size = vap->va_size;
4203 4203 mutex_exit(&rp->r_statelock);
4204 4204 }
4205 4205
4206 4206 /*
4207 4207 * Can free up request args and res
4208 4208 */
4209 4209 nfs4_fattr4_free(&argop[setattr_argop].nfs_argop4_u.
4210 4210 opsetattr.obj_attributes);
4211 4211 if (verify_argop != -1) {
4212 4212 nfs4args_verify_free(&argop[verify_argop]);
4213 4213 verify_argop = -1;
4214 4214 }
4215 4215 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
4216 4216
4217 4217 /*
4218 4218 * Some servers will change the mode to clear the setuid
4219 4219 * and setgid bits when changing the uid or gid. The
4220 4220 * client needs to compensate appropriately.
4221 4221 */
4222 4222 if (mask & (AT_UID | AT_GID)) {
4223 4223 int terror, do_setattr;
4224 4224
4225 4225 do_setattr = 0;
4226 4226 va.va_mask = AT_MODE;
4227 4227 terror = nfs4getattr(vp, &va, cr);
4228 4228 if (!terror &&
4229 4229 (((mask & AT_MODE) && va.va_mode != vap->va_mode) ||
4230 4230 (!(mask & AT_MODE) && va.va_mode != omode))) {
4231 4231 va.va_mask = AT_MODE;
4232 4232 if (mask & AT_MODE) {
4233 4233 /*
4234 4234 * We asked the mode to be changed and what
4235 4235 * we just got from the server in getattr is
4236 4236 * not what we wanted it to be, so set it now.
4237 4237 */
4238 4238 va.va_mode = vap->va_mode;
4239 4239 do_setattr = 1;
4240 4240 } else {
4241 4241 /*
4242 4242 * We did not ask the mode to be changed,
4243 4243 * Check to see that the server just cleared
4244 4244 * I_SUID and I_GUID from it. If not then
4245 4245 * set mode to omode with UID/GID cleared.
4246 4246 */
4247 4247 if (nfs4_compare_modes(va.va_mode, omode)) {
4248 4248 omode &= ~(S_ISUID|S_ISGID);
4249 4249 va.va_mode = omode;
4250 4250 do_setattr = 1;
4251 4251 }
4252 4252 }
4253 4253
4254 4254 if (do_setattr)
4255 4255 (void) nfs4setattr(vp, &va, 0, cr, NULL);
4256 4256 }
4257 4257 }
4258 4258
4259 4259 return (e.error);
4260 4260 }
4261 4261
4262 4262 /* ARGSUSED */
4263 4263 static int
4264 4264 nfs4_access(vnode_t *vp, int mode, int flags, cred_t *cr, caller_context_t *ct)
4265 4265 {
4266 4266 COMPOUND4args_clnt args;
4267 4267 COMPOUND4res_clnt res;
4268 4268 int doqueue;
4269 4269 uint32_t acc, resacc, argacc;
4270 4270 rnode4_t *rp;
4271 4271 cred_t *cred, *ncr, *ncrfree = NULL;
4272 4272 nfs4_access_type_t cacc;
4273 4273 int num_ops;
4274 4274 nfs_argop4 argop[3];
4275 4275 nfs_resop4 *resop;
4276 4276 bool_t needrecov = FALSE, do_getattr;
4277 4277 nfs4_recov_state_t recov_state;
4278 4278 int rpc_error;
4279 4279 hrtime_t t;
4280 4280 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
4281 4281 mntinfo4_t *mi = VTOMI4(vp);
4282 4282
4283 4283 if (nfs_zone() != mi->mi_zone)
4284 4284 return (EIO);
4285 4285
4286 4286 acc = 0;
4287 4287 if (mode & VREAD)
4288 4288 acc |= ACCESS4_READ;
4289 4289 if (mode & VWRITE) {
4290 4290 if ((vp->v_vfsp->vfs_flag & VFS_RDONLY) && !ISVDEV(vp->v_type))
4291 4291 return (EROFS);
4292 4292 if (vp->v_type == VDIR)
4293 4293 acc |= ACCESS4_DELETE;
4294 4294 acc |= ACCESS4_MODIFY | ACCESS4_EXTEND;
4295 4295 }
4296 4296 if (mode & VEXEC) {
4297 4297 if (vp->v_type == VDIR)
4298 4298 acc |= ACCESS4_LOOKUP;
4299 4299 else
4300 4300 acc |= ACCESS4_EXECUTE;
4301 4301 }
4302 4302
4303 4303 if (VTOR4(vp)->r_acache != NULL) {
4304 4304 e.error = nfs4_validate_caches(vp, cr);
4305 4305 if (e.error)
4306 4306 return (e.error);
4307 4307 }
4308 4308
4309 4309 rp = VTOR4(vp);
4310 4310 if (vp->v_type == VDIR)
4311 4311 argacc = ACCESS4_READ | ACCESS4_DELETE | ACCESS4_MODIFY |
4312 4312 ACCESS4_EXTEND | ACCESS4_LOOKUP;
4313 4313 else
4314 4314 argacc = ACCESS4_READ | ACCESS4_MODIFY | ACCESS4_EXTEND |
4315 4315 ACCESS4_EXECUTE;
4316 4316 recov_state.rs_flags = 0;
4317 4317 recov_state.rs_num_retry_despite_err = 0;
4318 4318
4319 4319 cred = cr;
4320 4320 /*
4321 4321 * ncr and ncrfree both initially
4322 4322 * point to the memory area returned
4323 4323 * by crnetadjust();
4324 4324 * ncrfree not NULL when exiting means
4325 4325 * that we need to release it
4326 4326 */
4327 4327 ncr = crnetadjust(cred);
4328 4328 ncrfree = ncr;
4329 4329
4330 4330 tryagain:
4331 4331 cacc = nfs4_access_check(rp, acc, cred);
4332 4332 if (cacc == NFS4_ACCESS_ALLOWED) {
4333 4333 if (ncrfree != NULL)
4334 4334 crfree(ncrfree);
4335 4335 return (0);
4336 4336 }
4337 4337 if (cacc == NFS4_ACCESS_DENIED) {
4338 4338 /*
4339 4339 * If the cred can be adjusted, try again
4340 4340 * with the new cred.
4341 4341 */
4342 4342 if (ncr != NULL) {
4343 4343 cred = ncr;
4344 4344 ncr = NULL;
4345 4345 goto tryagain;
4346 4346 }
4347 4347 if (ncrfree != NULL)
4348 4348 crfree(ncrfree);
4349 4349 return (EACCES);
4350 4350 }
4351 4351
4352 4352 recov_retry:
4353 4353 /*
4354 4354 * Don't take with r_statev4_lock here. r_deleg_type could
4355 4355 * change as soon as lock is released. Since it is an int,
4356 4356 * there is no atomicity issue.
4357 4357 */
4358 4358 do_getattr = (rp->r_deleg_type == OPEN_DELEGATE_NONE);
4359 4359 num_ops = do_getattr ? 3 : 2;
4360 4360
4361 4361 args.ctag = TAG_ACCESS;
4362 4362
4363 4363 args.array_len = num_ops;
4364 4364 args.array = argop;
4365 4365
4366 4366 if (e.error = nfs4_start_fop(mi, vp, NULL, OH_ACCESS,
4367 4367 &recov_state, NULL)) {
4368 4368 if (ncrfree != NULL)
4369 4369 crfree(ncrfree);
4370 4370 return (e.error);
4371 4371 }
4372 4372
4373 4373 /* putfh target fh */
4374 4374 argop[0].argop = OP_CPUTFH;
4375 4375 argop[0].nfs_argop4_u.opcputfh.sfh = VTOR4(vp)->r_fh;
4376 4376
4377 4377 /* access */
4378 4378 argop[1].argop = OP_ACCESS;
4379 4379 argop[1].nfs_argop4_u.opaccess.access = argacc;
4380 4380
4381 4381 /* getattr */
4382 4382 if (do_getattr) {
4383 4383 argop[2].argop = OP_GETATTR;
4384 4384 argop[2].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
4385 4385 argop[2].nfs_argop4_u.opgetattr.mi = mi;
4386 4386 }
4387 4387
4388 4388 NFS4_DEBUG(nfs4_client_call_debug, (CE_NOTE,
4389 4389 "nfs4_access: %s call, rp %s", needrecov ? "recov" : "first",
4390 4390 rnode4info(VTOR4(vp))));
4391 4391
4392 4392 doqueue = 1;
4393 4393 t = gethrtime();
4394 4394 rfs4call(VTOMI4(vp), &args, &res, cred, &doqueue, 0, &e);
4395 4395 rpc_error = e.error;
4396 4396
4397 4397 needrecov = nfs4_needs_recovery(&e, FALSE, vp->v_vfsp);
4398 4398 if (needrecov) {
4399 4399 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
4400 4400 "nfs4_access: initiating recovery\n"));
4401 4401
4402 4402 if (nfs4_start_recovery(&e, VTOMI4(vp), vp, NULL, NULL,
4403 4403 NULL, OP_ACCESS, NULL, NULL, NULL) == FALSE) {
4404 4404 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_ACCESS,
4405 4405 &recov_state, needrecov);
4406 4406 if (!e.error)
4407 4407 (void) xdr_free(xdr_COMPOUND4res_clnt,
4408 4408 (caddr_t)&res);
4409 4409 goto recov_retry;
4410 4410 }
4411 4411 }
4412 4412 nfs4_end_fop(mi, vp, NULL, OH_ACCESS, &recov_state, needrecov);
4413 4413
4414 4414 if (e.error)
4415 4415 goto out;
4416 4416
4417 4417 if (res.status) {
4418 4418 e.error = geterrno4(res.status);
4419 4419 /*
4420 4420 * This might generate over the wire calls throught
4421 4421 * nfs4_invalidate_pages. Hence we need to call nfs4_end_op()
4422 4422 * here to avoid a deadlock.
4423 4423 */
4424 4424 nfs4_purge_stale_fh(e.error, vp, cr);
4425 4425 goto out;
4426 4426 }
4427 4427 resop = &res.array[1]; /* access res */
4428 4428
4429 4429 resacc = resop->nfs_resop4_u.opaccess.access;
4430 4430
4431 4431 if (do_getattr) {
4432 4432 resop++; /* getattr res */
4433 4433 nfs4_attr_cache(vp, &resop->nfs_resop4_u.opgetattr.ga_res,
4434 4434 t, cr, FALSE, NULL);
4435 4435 }
4436 4436
4437 4437 if (!e.error) {
4438 4438 nfs4_access_cache(rp, argacc, resacc, cred);
4439 4439 /*
4440 4440 * we just cached results with cred; if cred is the
4441 4441 * adjusted credentials from crnetadjust, we do not want
4442 4442 * to release them before exiting: hence setting ncrfree
4443 4443 * to NULL
4444 4444 */
4445 4445 if (cred != cr)
4446 4446 ncrfree = NULL;
4447 4447 /* XXX check the supported bits too? */
4448 4448 if ((acc & resacc) != acc) {
4449 4449 /*
4450 4450 * The following code implements the semantic
4451 4451 * that a setuid root program has *at least* the
4452 4452 * permissions of the user that is running the
4453 4453 * program. See rfs3call() for more portions
4454 4454 * of the implementation of this functionality.
4455 4455 */
4456 4456 /* XXX-LP */
4457 4457 if (ncr != NULL) {
4458 4458 (void) xdr_free(xdr_COMPOUND4res_clnt,
4459 4459 (caddr_t)&res);
4460 4460 cred = ncr;
4461 4461 ncr = NULL;
4462 4462 goto tryagain;
4463 4463 }
4464 4464 e.error = EACCES;
4465 4465 }
4466 4466 }
4467 4467
4468 4468 out:
4469 4469 if (!rpc_error)
4470 4470 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
4471 4471
4472 4472 if (ncrfree != NULL)
4473 4473 crfree(ncrfree);
4474 4474
4475 4475 return (e.error);
4476 4476 }
4477 4477
4478 4478 /* ARGSUSED */
4479 4479 static int
4480 4480 nfs4_readlink(vnode_t *vp, struct uio *uiop, cred_t *cr, caller_context_t *ct)
4481 4481 {
4482 4482 COMPOUND4args_clnt args;
4483 4483 COMPOUND4res_clnt res;
4484 4484 int doqueue;
4485 4485 rnode4_t *rp;
4486 4486 nfs_argop4 argop[3];
4487 4487 nfs_resop4 *resop;
4488 4488 READLINK4res *lr_res;
4489 4489 nfs4_ga_res_t *garp;
4490 4490 uint_t len;
4491 4491 char *linkdata;
4492 4492 bool_t needrecov = FALSE;
4493 4493 nfs4_recov_state_t recov_state;
4494 4494 hrtime_t t;
4495 4495 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
4496 4496
4497 4497 if (nfs_zone() != VTOMI4(vp)->mi_zone)
4498 4498 return (EIO);
4499 4499 /*
4500 4500 * Can't readlink anything other than a symbolic link.
4501 4501 */
4502 4502 if (vp->v_type != VLNK)
4503 4503 return (EINVAL);
4504 4504
4505 4505 rp = VTOR4(vp);
4506 4506 if (nfs4_do_symlink_cache && rp->r_symlink.contents != NULL) {
4507 4507 e.error = nfs4_validate_caches(vp, cr);
4508 4508 if (e.error)
4509 4509 return (e.error);
4510 4510 mutex_enter(&rp->r_statelock);
4511 4511 if (rp->r_symlink.contents != NULL) {
4512 4512 e.error = uiomove(rp->r_symlink.contents,
4513 4513 rp->r_symlink.len, UIO_READ, uiop);
4514 4514 mutex_exit(&rp->r_statelock);
4515 4515 return (e.error);
4516 4516 }
4517 4517 mutex_exit(&rp->r_statelock);
4518 4518 }
4519 4519 recov_state.rs_flags = 0;
4520 4520 recov_state.rs_num_retry_despite_err = 0;
4521 4521
4522 4522 recov_retry:
4523 4523 args.array_len = 3;
4524 4524 args.array = argop;
4525 4525 args.ctag = TAG_READLINK;
4526 4526
4527 4527 e.error = nfs4_start_op(VTOMI4(vp), vp, NULL, &recov_state);
4528 4528 if (e.error) {
4529 4529 return (e.error);
4530 4530 }
4531 4531
4532 4532 /* 0. putfh symlink fh */
4533 4533 argop[0].argop = OP_CPUTFH;
4534 4534 argop[0].nfs_argop4_u.opcputfh.sfh = VTOR4(vp)->r_fh;
4535 4535
4536 4536 /* 1. readlink */
4537 4537 argop[1].argop = OP_READLINK;
4538 4538
4539 4539 /* 2. getattr */
4540 4540 argop[2].argop = OP_GETATTR;
4541 4541 argop[2].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
4542 4542 argop[2].nfs_argop4_u.opgetattr.mi = VTOMI4(vp);
4543 4543
4544 4544 doqueue = 1;
4545 4545
4546 4546 NFS4_DEBUG(nfs4_client_call_debug, (CE_NOTE,
4547 4547 "nfs4_readlink: %s call, rp %s", needrecov ? "recov" : "first",
4548 4548 rnode4info(VTOR4(vp))));
4549 4549
4550 4550 t = gethrtime();
4551 4551
4552 4552 rfs4call(VTOMI4(vp), &args, &res, cr, &doqueue, 0, &e);
4553 4553
4554 4554 needrecov = nfs4_needs_recovery(&e, FALSE, vp->v_vfsp);
4555 4555 if (needrecov) {
4556 4556 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
4557 4557 "nfs4_readlink: initiating recovery\n"));
4558 4558
4559 4559 if (nfs4_start_recovery(&e, VTOMI4(vp), vp, NULL, NULL,
4560 4560 NULL, OP_READLINK, NULL, NULL, NULL) == FALSE) {
4561 4561 if (!e.error)
4562 4562 (void) xdr_free(xdr_COMPOUND4res_clnt,
4563 4563 (caddr_t)&res);
4564 4564
4565 4565 nfs4_end_op(VTOMI4(vp), vp, NULL, &recov_state,
4566 4566 needrecov);
4567 4567 goto recov_retry;
4568 4568 }
4569 4569 }
4570 4570
4571 4571 nfs4_end_op(VTOMI4(vp), vp, NULL, &recov_state, needrecov);
4572 4572
4573 4573 if (e.error)
4574 4574 return (e.error);
4575 4575
4576 4576 /*
4577 4577 * There is an path in the code below which calls
4578 4578 * nfs4_purge_stale_fh(), which may generate otw calls through
4579 4579 * nfs4_invalidate_pages. Hence we need to call nfs4_end_op()
4580 4580 * here to avoid nfs4_start_op() deadlock.
4581 4581 */
4582 4582
4583 4583 if (res.status && (res.array_len < args.array_len)) {
4584 4584 /*
4585 4585 * either Putfh or Link failed
4586 4586 */
4587 4587 e.error = geterrno4(res.status);
4588 4588 nfs4_purge_stale_fh(e.error, vp, cr);
4589 4589 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
4590 4590 return (e.error);
4591 4591 }
4592 4592
4593 4593 resop = &res.array[1]; /* readlink res */
4594 4594 lr_res = &resop->nfs_resop4_u.opreadlink;
4595 4595
4596 4596 /*
4597 4597 * treat symlink names as data
4598 4598 */
4599 4599 linkdata = utf8_to_str((utf8string *)&lr_res->link, &len, NULL);
4600 4600 if (linkdata != NULL) {
4601 4601 int uio_len = len - 1;
4602 4602 /* len includes null byte, which we won't uiomove */
4603 4603 e.error = uiomove(linkdata, uio_len, UIO_READ, uiop);
4604 4604 if (nfs4_do_symlink_cache && rp->r_symlink.contents == NULL) {
4605 4605 mutex_enter(&rp->r_statelock);
4606 4606 if (rp->r_symlink.contents == NULL) {
4607 4607 rp->r_symlink.contents = linkdata;
4608 4608 rp->r_symlink.len = uio_len;
4609 4609 rp->r_symlink.size = len;
4610 4610 mutex_exit(&rp->r_statelock);
4611 4611 } else {
4612 4612 mutex_exit(&rp->r_statelock);
4613 4613 kmem_free(linkdata, len);
4614 4614 }
4615 4615 } else {
4616 4616 kmem_free(linkdata, len);
4617 4617 }
4618 4618 }
4619 4619 if (res.status == NFS4_OK) {
4620 4620 resop++; /* getattr res */
4621 4621 garp = &resop->nfs_resop4_u.opgetattr.ga_res;
4622 4622 }
4623 4623 e.error = nfs4_update_attrcache(res.status, garp, t, vp, cr);
4624 4624
4625 4625 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
4626 4626
4627 4627 /*
4628 4628 * The over the wire error for attempting to readlink something
4629 4629 * other than a symbolic link is ENXIO. However, we need to
4630 4630 * return EINVAL instead of ENXIO, so we map it here.
4631 4631 */
4632 4632 return (e.error == ENXIO ? EINVAL : e.error);
4633 4633 }
4634 4634
4635 4635 /*
4636 4636 * Flush local dirty pages to stable storage on the server.
4637 4637 *
4638 4638 * If FNODSYNC is specified, then there is nothing to do because
4639 4639 * metadata changes are not cached on the client before being
4640 4640 * sent to the server.
4641 4641 */
4642 4642 /* ARGSUSED */
4643 4643 static int
4644 4644 nfs4_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct)
4645 4645 {
4646 4646 int error;
4647 4647
4648 4648 if ((syncflag & FNODSYNC) || IS_SWAPVP(vp))
4649 4649 return (0);
4650 4650 if (nfs_zone() != VTOMI4(vp)->mi_zone)
4651 4651 return (EIO);
4652 4652 error = nfs4_putpage_commit(vp, (offset_t)0, 0, cr);
4653 4653 if (!error)
4654 4654 error = VTOR4(vp)->r_error;
4655 4655 return (error);
4656 4656 }
4657 4657
4658 4658 /*
4659 4659 * Weirdness: if the file was removed or the target of a rename
4660 4660 * operation while it was open, it got renamed instead. Here we
4661 4661 * remove the renamed file.
4662 4662 */
4663 4663 /* ARGSUSED */
4664 4664 void
4665 4665 nfs4_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct)
4666 4666 {
4667 4667 rnode4_t *rp;
4668 4668
4669 4669 ASSERT(vp != DNLC_NO_VNODE);
4670 4670
4671 4671 rp = VTOR4(vp);
4672 4672
4673 4673 if (IS_SHADOW(vp, rp)) {
4674 4674 sv_inactive(vp);
4675 4675 return;
4676 4676 }
4677 4677
4678 4678 /*
4679 4679 * If this is coming from the wrong zone, we let someone in the right
4680 4680 * zone take care of it asynchronously. We can get here due to
4681 4681 * VN_RELE() being called from pageout() or fsflush(). This call may
4682 4682 * potentially turn into an expensive no-op if, for instance, v_count
4683 4683 * gets incremented in the meantime, but it's still correct.
4684 4684 */
4685 4685 if (nfs_zone() != VTOMI4(vp)->mi_zone) {
4686 4686 nfs4_async_inactive(vp, cr);
4687 4687 return;
4688 4688 }
4689 4689
4690 4690 /*
4691 4691 * Some of the cleanup steps might require over-the-wire
4692 4692 * operations. Since VOP_INACTIVE can get called as a result of
4693 4693 * other over-the-wire operations (e.g., an attribute cache update
4694 4694 * can lead to a DNLC purge), doing those steps now would lead to a
4695 4695 * nested call to the recovery framework, which can deadlock. So
4696 4696 * do any over-the-wire cleanups asynchronously, in a separate
4697 4697 * thread.
4698 4698 */
4699 4699
4700 4700 mutex_enter(&rp->r_os_lock);
4701 4701 mutex_enter(&rp->r_statelock);
4702 4702 mutex_enter(&rp->r_statev4_lock);
4703 4703
4704 4704 if (vp->v_type == VREG && list_head(&rp->r_open_streams) != NULL) {
4705 4705 mutex_exit(&rp->r_statev4_lock);
4706 4706 mutex_exit(&rp->r_statelock);
4707 4707 mutex_exit(&rp->r_os_lock);
4708 4708 nfs4_async_inactive(vp, cr);
4709 4709 return;
4710 4710 }
4711 4711
4712 4712 if (rp->r_deleg_type == OPEN_DELEGATE_READ ||
4713 4713 rp->r_deleg_type == OPEN_DELEGATE_WRITE) {
4714 4714 mutex_exit(&rp->r_statev4_lock);
4715 4715 mutex_exit(&rp->r_statelock);
4716 4716 mutex_exit(&rp->r_os_lock);
4717 4717 nfs4_async_inactive(vp, cr);
4718 4718 return;
4719 4719 }
4720 4720
4721 4721 if (rp->r_unldvp != NULL) {
4722 4722 mutex_exit(&rp->r_statev4_lock);
4723 4723 mutex_exit(&rp->r_statelock);
4724 4724 mutex_exit(&rp->r_os_lock);
4725 4725 nfs4_async_inactive(vp, cr);
4726 4726 return;
4727 4727 }
4728 4728 mutex_exit(&rp->r_statev4_lock);
4729 4729 mutex_exit(&rp->r_statelock);
4730 4730 mutex_exit(&rp->r_os_lock);
4731 4731
4732 4732 rp4_addfree(rp, cr);
4733 4733 }
4734 4734
4735 4735 /*
4736 4736 * nfs4_inactive_otw - nfs4_inactive, plus over-the-wire calls to free up
4737 4737 * various bits of state. The caller must not refer to vp after this call.
4738 4738 */
4739 4739
4740 4740 void
4741 4741 nfs4_inactive_otw(vnode_t *vp, cred_t *cr)
4742 4742 {
4743 4743 rnode4_t *rp = VTOR4(vp);
4744 4744 nfs4_recov_state_t recov_state;
4745 4745 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
4746 4746 vnode_t *unldvp;
4747 4747 char *unlname;
4748 4748 cred_t *unlcred;
4749 4749 COMPOUND4args_clnt args;
4750 4750 COMPOUND4res_clnt res, *resp;
4751 4751 nfs_argop4 argop[2];
4752 4752 int doqueue;
4753 4753 #ifdef DEBUG
4754 4754 char *name;
4755 4755 #endif
4756 4756
4757 4757 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
4758 4758 ASSERT(!IS_SHADOW(vp, rp));
4759 4759
4760 4760 #ifdef DEBUG
4761 4761 name = fn_name(VTOSV(vp)->sv_name);
4762 4762 NFS4_DEBUG(nfs4_client_inactive_debug, (CE_NOTE, "nfs4_inactive_otw: "
4763 4763 "release vnode %s", name));
4764 4764 kmem_free(name, MAXNAMELEN);
4765 4765 #endif
4766 4766
4767 4767 if (vp->v_type == VREG) {
4768 4768 bool_t recov_failed = FALSE;
4769 4769
4770 4770 e.error = nfs4close_all(vp, cr);
4771 4771 if (e.error) {
4772 4772 /* Check to see if recovery failed */
4773 4773 mutex_enter(&(VTOMI4(vp)->mi_lock));
4774 4774 if (VTOMI4(vp)->mi_flags & MI4_RECOV_FAIL)
4775 4775 recov_failed = TRUE;
4776 4776 mutex_exit(&(VTOMI4(vp)->mi_lock));
4777 4777 if (!recov_failed) {
4778 4778 mutex_enter(&rp->r_statelock);
4779 4779 if (rp->r_flags & R4RECOVERR)
4780 4780 recov_failed = TRUE;
4781 4781 mutex_exit(&rp->r_statelock);
4782 4782 }
4783 4783 if (recov_failed) {
4784 4784 NFS4_DEBUG(nfs4_client_recov_debug,
4785 4785 (CE_NOTE, "nfs4_inactive_otw: "
4786 4786 "close failed (recovery failure)"));
4787 4787 }
4788 4788 }
4789 4789 }
4790 4790
4791 4791 redo:
4792 4792 if (rp->r_unldvp == NULL) {
4793 4793 rp4_addfree(rp, cr);
4794 4794 return;
4795 4795 }
4796 4796
4797 4797 /*
4798 4798 * Save the vnode pointer for the directory where the
4799 4799 * unlinked-open file got renamed, then set it to NULL
4800 4800 * to prevent another thread from getting here before
4801 4801 * we're done with the remove. While we have the
4802 4802 * statelock, make local copies of the pertinent rnode
4803 4803 * fields. If we weren't to do this in an atomic way, the
4804 4804 * the unl* fields could become inconsistent with respect
4805 4805 * to each other due to a race condition between this
4806 4806 * code and nfs_remove(). See bug report 1034328.
4807 4807 */
4808 4808 mutex_enter(&rp->r_statelock);
4809 4809 if (rp->r_unldvp == NULL) {
4810 4810 mutex_exit(&rp->r_statelock);
4811 4811 rp4_addfree(rp, cr);
4812 4812 return;
4813 4813 }
4814 4814
4815 4815 unldvp = rp->r_unldvp;
4816 4816 rp->r_unldvp = NULL;
4817 4817 unlname = rp->r_unlname;
4818 4818 rp->r_unlname = NULL;
4819 4819 unlcred = rp->r_unlcred;
4820 4820 rp->r_unlcred = NULL;
4821 4821 mutex_exit(&rp->r_statelock);
4822 4822
4823 4823 /*
4824 4824 * If there are any dirty pages left, then flush
4825 4825 * them. This is unfortunate because they just
4826 4826 * may get thrown away during the remove operation,
4827 4827 * but we have to do this for correctness.
4828 4828 */
4829 4829 if (nfs4_has_pages(vp) &&
4830 4830 ((rp->r_flags & R4DIRTY) || rp->r_count > 0)) {
4831 4831 ASSERT(vp->v_type != VCHR);
4832 4832 e.error = nfs4_putpage(vp, (u_offset_t)0, 0, 0, cr, NULL);
4833 4833 if (e.error) {
4834 4834 mutex_enter(&rp->r_statelock);
4835 4835 if (!rp->r_error)
4836 4836 rp->r_error = e.error;
4837 4837 mutex_exit(&rp->r_statelock);
4838 4838 }
4839 4839 }
4840 4840
4841 4841 recov_state.rs_flags = 0;
4842 4842 recov_state.rs_num_retry_despite_err = 0;
4843 4843 recov_retry_remove:
4844 4844 /*
4845 4845 * Do the remove operation on the renamed file
4846 4846 */
4847 4847 args.ctag = TAG_INACTIVE;
4848 4848
4849 4849 /*
4850 4850 * Remove ops: putfh dir; remove
4851 4851 */
4852 4852 args.array_len = 2;
4853 4853 args.array = argop;
4854 4854
4855 4855 e.error = nfs4_start_op(VTOMI4(unldvp), unldvp, NULL, &recov_state);
4856 4856 if (e.error) {
4857 4857 kmem_free(unlname, MAXNAMELEN);
4858 4858 crfree(unlcred);
4859 4859 VN_RELE(unldvp);
4860 4860 /*
4861 4861 * Try again; this time around r_unldvp will be NULL, so we'll
4862 4862 * just call rp4_addfree() and return.
4863 4863 */
4864 4864 goto redo;
4865 4865 }
4866 4866
4867 4867 /* putfh directory */
4868 4868 argop[0].argop = OP_CPUTFH;
4869 4869 argop[0].nfs_argop4_u.opcputfh.sfh = VTOR4(unldvp)->r_fh;
4870 4870
4871 4871 /* remove */
4872 4872 argop[1].argop = OP_CREMOVE;
4873 4873 argop[1].nfs_argop4_u.opcremove.ctarget = unlname;
4874 4874
4875 4875 doqueue = 1;
4876 4876 resp = &res;
4877 4877
4878 4878 #if 0 /* notyet */
4879 4879 /*
4880 4880 * Can't do this yet. We may be being called from
4881 4881 * dnlc_purge_XXX while that routine is holding a
4882 4882 * mutex lock to the nc_rele list. The calls to
4883 4883 * nfs3_cache_wcc_data may result in calls to
4884 4884 * dnlc_purge_XXX. This will result in a deadlock.
4885 4885 */
4886 4886 rfs4call(VTOMI4(unldvp), &args, &res, unlcred, &doqueue, 0, &e);
4887 4887 if (e.error) {
4888 4888 PURGE_ATTRCACHE4(unldvp);
4889 4889 resp = NULL;
4890 4890 } else if (res.status) {
4891 4891 e.error = geterrno4(res.status);
4892 4892 PURGE_ATTRCACHE4(unldvp);
4893 4893 /*
4894 4894 * This code is inactive right now
4895 4895 * but if made active there should
4896 4896 * be a nfs4_end_op() call before
4897 4897 * nfs4_purge_stale_fh to avoid start_op()
4898 4898 * deadlock. See BugId: 4948726
4899 4899 */
4900 4900 nfs4_purge_stale_fh(error, unldvp, cr);
4901 4901 } else {
4902 4902 nfs_resop4 *resop;
4903 4903 REMOVE4res *rm_res;
4904 4904
4905 4905 resop = &res.array[1];
4906 4906 rm_res = &resop->nfs_resop4_u.opremove;
4907 4907 /*
4908 4908 * Update directory cache attribute,
4909 4909 * readdir and dnlc caches.
4910 4910 */
4911 4911 nfs4_update_dircaches(&rm_res->cinfo, unldvp, NULL, NULL, NULL);
4912 4912 }
4913 4913 #else
4914 4914 rfs4call(VTOMI4(unldvp), &args, &res, unlcred, &doqueue, 0, &e);
4915 4915
4916 4916 PURGE_ATTRCACHE4(unldvp);
4917 4917 #endif
4918 4918
4919 4919 if (nfs4_needs_recovery(&e, FALSE, unldvp->v_vfsp)) {
4920 4920 if (nfs4_start_recovery(&e, VTOMI4(unldvp), unldvp, NULL,
4921 4921 NULL, NULL, OP_REMOVE, NULL, NULL, NULL) == FALSE) {
4922 4922 if (!e.error)
4923 4923 (void) xdr_free(xdr_COMPOUND4res_clnt,
4924 4924 (caddr_t)&res);
4925 4925 nfs4_end_op(VTOMI4(unldvp), unldvp, NULL,
4926 4926 &recov_state, TRUE);
4927 4927 goto recov_retry_remove;
4928 4928 }
4929 4929 }
4930 4930 nfs4_end_op(VTOMI4(unldvp), unldvp, NULL, &recov_state, FALSE);
4931 4931
4932 4932 /*
4933 4933 * Release stuff held for the remove
4934 4934 */
4935 4935 VN_RELE(unldvp);
4936 4936 if (!e.error && resp)
4937 4937 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
4938 4938
4939 4939 kmem_free(unlname, MAXNAMELEN);
4940 4940 crfree(unlcred);
4941 4941 goto redo;
4942 4942 }
4943 4943
4944 4944 /*
4945 4945 * Remote file system operations having to do with directory manipulation.
4946 4946 */
4947 4947 /* ARGSUSED3 */
4948 4948 int
4949 4949 nfs4_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp,
4950 4950 int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
4951 4951 int *direntflags, pathname_t *realpnp)
4952 4952 {
4953 4953 int error;
4954 4954 vnode_t *vp, *avp = NULL;
4955 4955 rnode4_t *drp;
4956 4956
4957 4957 *vpp = NULL;
4958 4958 if (nfs_zone() != VTOMI4(dvp)->mi_zone)
4959 4959 return (EPERM);
4960 4960 /*
4961 4961 * if LOOKUP_XATTR, must replace dvp (object) with
4962 4962 * object's attrdir before continuing with lookup
4963 4963 */
4964 4964 if (flags & LOOKUP_XATTR) {
4965 4965 error = nfs4lookup_xattr(dvp, nm, &avp, flags, cr);
4966 4966 if (error)
4967 4967 return (error);
4968 4968
4969 4969 dvp = avp;
4970 4970
4971 4971 /*
4972 4972 * If lookup is for "", just return dvp now. The attrdir
4973 4973 * has already been activated (from nfs4lookup_xattr), and
4974 4974 * the caller will RELE the original dvp -- not
4975 4975 * the attrdir. So, set vpp and return.
4976 4976 * Currently, when the LOOKUP_XATTR flag is
4977 4977 * passed to VOP_LOOKUP, the name is always empty, and
4978 4978 * shortcircuiting here avoids 3 unneeded lock/unlock
4979 4979 * pairs.
4980 4980 *
4981 4981 * If a non-empty name was provided, then it is the
4982 4982 * attribute name, and it will be looked up below.
4983 4983 */
4984 4984 if (*nm == '\0') {
4985 4985 *vpp = dvp;
4986 4986 return (0);
4987 4987 }
4988 4988
4989 4989 /*
4990 4990 * The vfs layer never sends a name when asking for the
4991 4991 * attrdir, so we should never get here (unless of course
4992 4992 * name is passed at some time in future -- at which time
4993 4993 * we'll blow up here).
4994 4994 */
4995 4995 ASSERT(0);
4996 4996 }
4997 4997
4998 4998 drp = VTOR4(dvp);
4999 4999 if (nfs_rw_enter_sig(&drp->r_rwlock, RW_READER, INTR4(dvp)))
5000 5000 return (EINTR);
5001 5001
5002 5002 error = nfs4lookup(dvp, nm, vpp, cr, 0);
5003 5003 nfs_rw_exit(&drp->r_rwlock);
5004 5004
5005 5005 /*
5006 5006 * If vnode is a device, create special vnode.
5007 5007 */
5008 5008 if (!error && ISVDEV((*vpp)->v_type)) {
5009 5009 vp = *vpp;
5010 5010 *vpp = specvp(vp, vp->v_rdev, vp->v_type, cr);
5011 5011 VN_RELE(vp);
5012 5012 }
5013 5013
5014 5014 return (error);
5015 5015 }
5016 5016
5017 5017 /* ARGSUSED */
5018 5018 static int
5019 5019 nfs4lookup_xattr(vnode_t *dvp, char *nm, vnode_t **vpp, int flags, cred_t *cr)
5020 5020 {
5021 5021 int error;
5022 5022 rnode4_t *drp;
5023 5023 int cflag = ((flags & CREATE_XATTR_DIR) != 0);
5024 5024 mntinfo4_t *mi;
5025 5025
5026 5026 mi = VTOMI4(dvp);
5027 5027 if (!(mi->mi_vfsp->vfs_flag & VFS_XATTR) &&
5028 5028 !vfs_has_feature(mi->mi_vfsp, VFSFT_SYSATTR_VIEWS))
5029 5029 return (EINVAL);
5030 5030
5031 5031 drp = VTOR4(dvp);
5032 5032 if (nfs_rw_enter_sig(&drp->r_rwlock, RW_READER, INTR4(dvp)))
5033 5033 return (EINTR);
5034 5034
5035 5035 mutex_enter(&drp->r_statelock);
5036 5036 /*
5037 5037 * If the server doesn't support xattrs just return EINVAL
5038 5038 */
5039 5039 if (drp->r_xattr_dir == NFS4_XATTR_DIR_NOTSUPP) {
5040 5040 mutex_exit(&drp->r_statelock);
5041 5041 nfs_rw_exit(&drp->r_rwlock);
5042 5042 return (EINVAL);
5043 5043 }
5044 5044
5045 5045 /*
5046 5046 * If there is a cached xattr directory entry,
5047 5047 * use it as long as the attributes are valid. If the
5048 5048 * attributes are not valid, take the simple approach and
5049 5049 * free the cached value and re-fetch a new value.
5050 5050 *
5051 5051 * We don't negative entry cache for now, if we did we
5052 5052 * would need to check if the file has changed on every
5053 5053 * lookup. But xattrs don't exist very often and failing
5054 5054 * an openattr is not much more expensive than and NVERIFY or GETATTR
5055 5055 * so do an openattr over the wire for now.
5056 5056 */
5057 5057 if (drp->r_xattr_dir != NULL) {
5058 5058 if (ATTRCACHE4_VALID(dvp)) {
5059 5059 VN_HOLD(drp->r_xattr_dir);
5060 5060 *vpp = drp->r_xattr_dir;
5061 5061 mutex_exit(&drp->r_statelock);
5062 5062 nfs_rw_exit(&drp->r_rwlock);
5063 5063 return (0);
5064 5064 }
5065 5065 VN_RELE(drp->r_xattr_dir);
5066 5066 drp->r_xattr_dir = NULL;
5067 5067 }
5068 5068 mutex_exit(&drp->r_statelock);
5069 5069
5070 5070 error = nfs4openattr(dvp, vpp, cflag, cr);
5071 5071
5072 5072 nfs_rw_exit(&drp->r_rwlock);
5073 5073
5074 5074 return (error);
5075 5075 }
5076 5076
5077 5077 static int
5078 5078 nfs4lookup(vnode_t *dvp, char *nm, vnode_t **vpp, cred_t *cr, int skipdnlc)
5079 5079 {
5080 5080 int error;
5081 5081 rnode4_t *drp;
5082 5082
5083 5083 ASSERT(nfs_zone() == VTOMI4(dvp)->mi_zone);
5084 5084
5085 5085 /*
5086 5086 * If lookup is for "", just return dvp. Don't need
5087 5087 * to send it over the wire, look it up in the dnlc,
5088 5088 * or perform any access checks.
5089 5089 */
5090 5090 if (*nm == '\0') {
5091 5091 VN_HOLD(dvp);
5092 5092 *vpp = dvp;
5093 5093 return (0);
5094 5094 }
5095 5095
5096 5096 /*
5097 5097 * Can't do lookups in non-directories.
5098 5098 */
5099 5099 if (dvp->v_type != VDIR)
5100 5100 return (ENOTDIR);
5101 5101
5102 5102 /*
5103 5103 * If lookup is for ".", just return dvp. Don't need
5104 5104 * to send it over the wire or look it up in the dnlc,
5105 5105 * just need to check access.
5106 5106 */
5107 5107 if (nm[0] == '.' && nm[1] == '\0') {
5108 5108 error = nfs4_access(dvp, VEXEC, 0, cr, NULL);
5109 5109 if (error)
5110 5110 return (error);
5111 5111 VN_HOLD(dvp);
5112 5112 *vpp = dvp;
5113 5113 return (0);
5114 5114 }
5115 5115
5116 5116 drp = VTOR4(dvp);
5117 5117 if (!(drp->r_flags & R4LOOKUP)) {
5118 5118 mutex_enter(&drp->r_statelock);
5119 5119 drp->r_flags |= R4LOOKUP;
5120 5120 mutex_exit(&drp->r_statelock);
5121 5121 }
5122 5122
5123 5123 *vpp = NULL;
5124 5124 /*
5125 5125 * Lookup this name in the DNLC. If there is no entry
5126 5126 * lookup over the wire.
5127 5127 */
5128 5128 if (!skipdnlc)
5129 5129 *vpp = dnlc_lookup(dvp, nm);
5130 5130 if (*vpp == NULL) {
5131 5131 /*
5132 5132 * We need to go over the wire to lookup the name.
5133 5133 */
5134 5134 return (nfs4lookupnew_otw(dvp, nm, vpp, cr));
5135 5135 }
5136 5136
5137 5137 /*
5138 5138 * We hit on the dnlc
5139 5139 */
5140 5140 if (*vpp != DNLC_NO_VNODE ||
5141 5141 (dvp->v_vfsp->vfs_flag & VFS_RDONLY)) {
5142 5142 /*
5143 5143 * But our attrs may not be valid.
5144 5144 */
5145 5145 if (ATTRCACHE4_VALID(dvp)) {
5146 5146 error = nfs4_waitfor_purge_complete(dvp);
5147 5147 if (error) {
5148 5148 VN_RELE(*vpp);
5149 5149 *vpp = NULL;
5150 5150 return (error);
5151 5151 }
5152 5152
5153 5153 /*
5154 5154 * If after the purge completes, check to make sure
5155 5155 * our attrs are still valid.
5156 5156 */
5157 5157 if (ATTRCACHE4_VALID(dvp)) {
5158 5158 /*
5159 5159 * If we waited for a purge we may have
5160 5160 * lost our vnode so look it up again.
5161 5161 */
5162 5162 VN_RELE(*vpp);
5163 5163 *vpp = dnlc_lookup(dvp, nm);
5164 5164 if (*vpp == NULL)
5165 5165 return (nfs4lookupnew_otw(dvp,
5166 5166 nm, vpp, cr));
5167 5167
5168 5168 /*
5169 5169 * The access cache should almost always hit
5170 5170 */
5171 5171 error = nfs4_access(dvp, VEXEC, 0, cr, NULL);
5172 5172
5173 5173 if (error) {
5174 5174 VN_RELE(*vpp);
5175 5175 *vpp = NULL;
5176 5176 return (error);
5177 5177 }
5178 5178 if (*vpp == DNLC_NO_VNODE) {
5179 5179 VN_RELE(*vpp);
5180 5180 *vpp = NULL;
5181 5181 return (ENOENT);
5182 5182 }
5183 5183 return (0);
5184 5184 }
5185 5185 }
5186 5186 }
5187 5187
5188 5188 ASSERT(*vpp != NULL);
5189 5189
5190 5190 /*
5191 5191 * We may have gotten here we have one of the following cases:
5192 5192 * 1) vpp != DNLC_NO_VNODE, our attrs have timed out so we
5193 5193 * need to validate them.
5194 5194 * 2) vpp == DNLC_NO_VNODE, a negative entry that we always
5195 5195 * must validate.
5196 5196 *
5197 5197 * Go to the server and check if the directory has changed, if
5198 5198 * it hasn't we are done and can use the dnlc entry.
5199 5199 */
5200 5200 return (nfs4lookupvalidate_otw(dvp, nm, vpp, cr));
5201 5201 }
5202 5202
5203 5203 /*
5204 5204 * Go to the server and check if the directory has changed, if
5205 5205 * it hasn't we are done and can use the dnlc entry. If it
5206 5206 * has changed we get a new copy of its attributes and check
5207 5207 * the access for VEXEC, then relookup the filename and
5208 5208 * get its filehandle and attributes.
5209 5209 *
5210 5210 * PUTFH dfh NVERIFY GETATTR ACCESS LOOKUP GETFH GETATTR
5211 5211 * if the NVERIFY failed we must
5212 5212 * purge the caches
5213 5213 * cache new attributes (will set r_time_attr_inval)
5214 5214 * cache new access
5215 5215 * recheck VEXEC access
5216 5216 * add name to dnlc, possibly negative
5217 5217 * if LOOKUP succeeded
5218 5218 * cache new attributes
5219 5219 * else
5220 5220 * set a new r_time_attr_inval for dvp
5221 5221 * check to make sure we have access
5222 5222 *
5223 5223 * The vpp returned is the vnode passed in if the directory is valid,
5224 5224 * a new vnode if successful lookup, or NULL on error.
5225 5225 */
5226 5226 static int
5227 5227 nfs4lookupvalidate_otw(vnode_t *dvp, char *nm, vnode_t **vpp, cred_t *cr)
5228 5228 {
5229 5229 COMPOUND4args_clnt args;
5230 5230 COMPOUND4res_clnt res;
5231 5231 fattr4 *ver_fattr;
5232 5232 fattr4_change dchange;
5233 5233 int32_t *ptr;
5234 5234 int argoplist_size = 7 * sizeof (nfs_argop4);
5235 5235 nfs_argop4 *argop;
5236 5236 int doqueue;
5237 5237 mntinfo4_t *mi;
5238 5238 nfs4_recov_state_t recov_state;
5239 5239 hrtime_t t;
5240 5240 int isdotdot;
5241 5241 vnode_t *nvp;
5242 5242 nfs_fh4 *fhp;
5243 5243 nfs4_sharedfh_t *sfhp;
5244 5244 nfs4_access_type_t cacc;
5245 5245 rnode4_t *nrp;
5246 5246 rnode4_t *drp = VTOR4(dvp);
5247 5247 nfs4_ga_res_t *garp = NULL;
5248 5248 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
5249 5249
5250 5250 ASSERT(nfs_zone() == VTOMI4(dvp)->mi_zone);
5251 5251 ASSERT(nm != NULL);
5252 5252 ASSERT(nm[0] != '\0');
5253 5253 ASSERT(dvp->v_type == VDIR);
5254 5254 ASSERT(nm[0] != '.' || nm[1] != '\0');
5255 5255 ASSERT(*vpp != NULL);
5256 5256
5257 5257 if (nm[0] == '.' && nm[1] == '.' && nm[2] == '\0') {
5258 5258 isdotdot = 1;
5259 5259 args.ctag = TAG_LOOKUP_VPARENT;
5260 5260 } else {
5261 5261 /*
5262 5262 * If dvp were a stub, it should have triggered and caused
5263 5263 * a mount for us to get this far.
5264 5264 */
5265 5265 ASSERT(!RP_ISSTUB(VTOR4(dvp)));
5266 5266
5267 5267 isdotdot = 0;
5268 5268 args.ctag = TAG_LOOKUP_VALID;
5269 5269 }
5270 5270
5271 5271 mi = VTOMI4(dvp);
5272 5272 recov_state.rs_flags = 0;
5273 5273 recov_state.rs_num_retry_despite_err = 0;
5274 5274
5275 5275 nvp = NULL;
5276 5276
5277 5277 /* Save the original mount point security information */
5278 5278 (void) save_mnt_secinfo(mi->mi_curr_serv);
5279 5279
5280 5280 recov_retry:
5281 5281 e.error = nfs4_start_fop(mi, dvp, NULL, OH_LOOKUP,
5282 5282 &recov_state, NULL);
5283 5283 if (e.error) {
5284 5284 (void) check_mnt_secinfo(mi->mi_curr_serv, nvp);
5285 5285 VN_RELE(*vpp);
5286 5286 *vpp = NULL;
5287 5287 return (e.error);
5288 5288 }
5289 5289
5290 5290 argop = kmem_alloc(argoplist_size, KM_SLEEP);
5291 5291
5292 5292 /* PUTFH dfh NVERIFY GETATTR ACCESS LOOKUP GETFH GETATTR */
5293 5293 args.array_len = 7;
5294 5294 args.array = argop;
5295 5295
5296 5296 /* 0. putfh file */
5297 5297 argop[0].argop = OP_CPUTFH;
5298 5298 argop[0].nfs_argop4_u.opcputfh.sfh = VTOR4(dvp)->r_fh;
5299 5299
5300 5300 /* 1. nverify the change info */
5301 5301 argop[1].argop = OP_NVERIFY;
5302 5302 ver_fattr = &argop[1].nfs_argop4_u.opnverify.obj_attributes;
5303 5303 ver_fattr->attrmask = FATTR4_CHANGE_MASK;
5304 5304 ver_fattr->attrlist4 = (char *)&dchange;
5305 5305 ptr = (int32_t *)&dchange;
5306 5306 IXDR_PUT_HYPER(ptr, VTOR4(dvp)->r_change);
5307 5307 ver_fattr->attrlist4_len = sizeof (fattr4_change);
5308 5308
5309 5309 /* 2. getattr directory */
5310 5310 argop[2].argop = OP_GETATTR;
5311 5311 argop[2].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
5312 5312 argop[2].nfs_argop4_u.opgetattr.mi = VTOMI4(dvp);
5313 5313
5314 5314 /* 3. access directory */
5315 5315 argop[3].argop = OP_ACCESS;
5316 5316 argop[3].nfs_argop4_u.opaccess.access = ACCESS4_READ | ACCESS4_DELETE |
5317 5317 ACCESS4_MODIFY | ACCESS4_EXTEND | ACCESS4_LOOKUP;
5318 5318
5319 5319 /* 4. lookup name */
5320 5320 if (isdotdot) {
5321 5321 argop[4].argop = OP_LOOKUPP;
5322 5322 } else {
5323 5323 argop[4].argop = OP_CLOOKUP;
5324 5324 argop[4].nfs_argop4_u.opclookup.cname = nm;
5325 5325 }
5326 5326
5327 5327 /* 5. resulting file handle */
5328 5328 argop[5].argop = OP_GETFH;
5329 5329
5330 5330 /* 6. resulting file attributes */
5331 5331 argop[6].argop = OP_GETATTR;
5332 5332 argop[6].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
5333 5333 argop[6].nfs_argop4_u.opgetattr.mi = VTOMI4(dvp);
5334 5334
5335 5335 doqueue = 1;
5336 5336 t = gethrtime();
5337 5337
5338 5338 rfs4call(VTOMI4(dvp), &args, &res, cr, &doqueue, 0, &e);
5339 5339
5340 5340 if (!isdotdot && res.status == NFS4ERR_MOVED) {
5341 5341 e.error = nfs4_setup_referral(dvp, nm, vpp, cr);
5342 5342 if (e.error != 0 && *vpp != NULL)
5343 5343 VN_RELE(*vpp);
5344 5344 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP,
5345 5345 &recov_state, FALSE);
5346 5346 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
5347 5347 kmem_free(argop, argoplist_size);
5348 5348 return (e.error);
5349 5349 }
5350 5350
5351 5351 if (nfs4_needs_recovery(&e, FALSE, dvp->v_vfsp)) {
5352 5352 /*
5353 5353 * For WRONGSEC of a non-dotdot case, send secinfo directly
5354 5354 * from this thread, do not go thru the recovery thread since
5355 5355 * we need the nm information.
5356 5356 *
5357 5357 * Not doing dotdot case because there is no specification
5358 5358 * for (PUTFH, SECINFO "..") yet.
5359 5359 */
5360 5360 if (!isdotdot && res.status == NFS4ERR_WRONGSEC) {
5361 5361 if ((e.error = nfs4_secinfo_vnode_otw(dvp, nm, cr)))
5362 5362 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP,
5363 5363 &recov_state, FALSE);
5364 5364 else
5365 5365 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP,
5366 5366 &recov_state, TRUE);
5367 5367 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
5368 5368 kmem_free(argop, argoplist_size);
5369 5369 if (!e.error)
5370 5370 goto recov_retry;
5371 5371 (void) check_mnt_secinfo(mi->mi_curr_serv, nvp);
5372 5372 VN_RELE(*vpp);
5373 5373 *vpp = NULL;
5374 5374 return (e.error);
5375 5375 }
5376 5376
5377 5377 if (nfs4_start_recovery(&e, mi, dvp, NULL, NULL, NULL,
5378 5378 OP_LOOKUP, NULL, NULL, NULL) == FALSE) {
5379 5379 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP,
5380 5380 &recov_state, TRUE);
5381 5381
5382 5382 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
5383 5383 kmem_free(argop, argoplist_size);
5384 5384 goto recov_retry;
5385 5385 }
5386 5386 }
5387 5387
5388 5388 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP, &recov_state, FALSE);
5389 5389
5390 5390 if (e.error || res.array_len == 0) {
5391 5391 /*
5392 5392 * If e.error isn't set, then reply has no ops (or we couldn't
5393 5393 * be here). The only legal way to reply without an op array
5394 5394 * is via NFS4ERR_MINOR_VERS_MISMATCH. An ops array should
5395 5395 * be in the reply for all other status values.
5396 5396 *
5397 5397 * For valid replies without an ops array, return ENOTSUP
5398 5398 * (geterrno4 xlation of VERS_MISMATCH). For illegal replies,
5399 5399 * return EIO -- don't trust status.
5400 5400 */
5401 5401 if (e.error == 0)
5402 5402 e.error = (res.status == NFS4ERR_MINOR_VERS_MISMATCH) ?
5403 5403 ENOTSUP : EIO;
5404 5404 VN_RELE(*vpp);
5405 5405 *vpp = NULL;
5406 5406 kmem_free(argop, argoplist_size);
5407 5407 (void) check_mnt_secinfo(mi->mi_curr_serv, nvp);
5408 5408 return (e.error);
5409 5409 }
5410 5410
5411 5411 if (res.status != NFS4ERR_SAME) {
5412 5412 e.error = geterrno4(res.status);
5413 5413
5414 5414 /*
5415 5415 * The NVERIFY "failed" so the directory has changed
5416 5416 * First make sure PUTFH succeeded and NVERIFY "failed"
5417 5417 * cleanly.
5418 5418 */
5419 5419 if ((res.array[0].nfs_resop4_u.opputfh.status != NFS4_OK) ||
5420 5420 (res.array[1].nfs_resop4_u.opnverify.status != NFS4_OK)) {
5421 5421 nfs4_purge_stale_fh(e.error, dvp, cr);
5422 5422 VN_RELE(*vpp);
5423 5423 *vpp = NULL;
5424 5424 goto exit;
5425 5425 }
5426 5426
5427 5427 /*
5428 5428 * We know the NVERIFY "failed" so we must:
5429 5429 * purge the caches (access and indirectly dnlc if needed)
5430 5430 */
5431 5431 nfs4_purge_caches(dvp, NFS4_NOPURGE_DNLC, cr, TRUE);
5432 5432
5433 5433 if (res.array[2].nfs_resop4_u.opgetattr.status != NFS4_OK) {
5434 5434 nfs4_purge_stale_fh(e.error, dvp, cr);
5435 5435 VN_RELE(*vpp);
5436 5436 *vpp = NULL;
5437 5437 goto exit;
5438 5438 }
5439 5439
5440 5440 /*
5441 5441 * Install new cached attributes for the directory
5442 5442 */
5443 5443 nfs4_attr_cache(dvp,
5444 5444 &res.array[2].nfs_resop4_u.opgetattr.ga_res,
5445 5445 t, cr, FALSE, NULL);
5446 5446
5447 5447 if (res.array[3].nfs_resop4_u.opaccess.status != NFS4_OK) {
5448 5448 nfs4_purge_stale_fh(e.error, dvp, cr);
5449 5449 VN_RELE(*vpp);
5450 5450 *vpp = NULL;
5451 5451 e.error = geterrno4(res.status);
5452 5452 goto exit;
5453 5453 }
5454 5454
5455 5455 /*
5456 5456 * Now we know the directory is valid,
5457 5457 * cache new directory access
5458 5458 */
5459 5459 nfs4_access_cache(drp,
5460 5460 args.array[3].nfs_argop4_u.opaccess.access,
5461 5461 res.array[3].nfs_resop4_u.opaccess.access, cr);
5462 5462
5463 5463 /*
5464 5464 * recheck VEXEC access
5465 5465 */
5466 5466 cacc = nfs4_access_check(drp, ACCESS4_LOOKUP, cr);
5467 5467 if (cacc != NFS4_ACCESS_ALLOWED) {
5468 5468 /*
5469 5469 * Directory permissions might have been revoked
5470 5470 */
5471 5471 if (cacc == NFS4_ACCESS_DENIED) {
5472 5472 e.error = EACCES;
5473 5473 VN_RELE(*vpp);
5474 5474 *vpp = NULL;
5475 5475 goto exit;
5476 5476 }
5477 5477
5478 5478 /*
5479 5479 * Somehow we must not have asked for enough
5480 5480 * so try a singleton ACCESS, should never happen.
5481 5481 */
5482 5482 e.error = nfs4_access(dvp, VEXEC, 0, cr, NULL);
5483 5483 if (e.error) {
5484 5484 VN_RELE(*vpp);
5485 5485 *vpp = NULL;
5486 5486 goto exit;
5487 5487 }
5488 5488 }
5489 5489
5490 5490 e.error = geterrno4(res.status);
5491 5491 if (res.array[4].nfs_resop4_u.oplookup.status != NFS4_OK) {
5492 5492 /*
5493 5493 * The lookup failed, probably no entry
5494 5494 */
5495 5495 if (e.error == ENOENT && nfs4_lookup_neg_cache) {
5496 5496 dnlc_update(dvp, nm, DNLC_NO_VNODE);
5497 5497 } else {
5498 5498 /*
5499 5499 * Might be some other error, so remove
5500 5500 * the dnlc entry to make sure we start all
5501 5501 * over again, next time.
5502 5502 */
5503 5503 dnlc_remove(dvp, nm);
5504 5504 }
5505 5505 VN_RELE(*vpp);
5506 5506 *vpp = NULL;
5507 5507 goto exit;
5508 5508 }
5509 5509
5510 5510 if (res.array[5].nfs_resop4_u.opgetfh.status != NFS4_OK) {
5511 5511 /*
5512 5512 * The file exists but we can't get its fh for
5513 5513 * some unknown reason. Remove it from the dnlc
5514 5514 * and error out to be safe.
5515 5515 */
5516 5516 dnlc_remove(dvp, nm);
5517 5517 VN_RELE(*vpp);
5518 5518 *vpp = NULL;
5519 5519 goto exit;
5520 5520 }
5521 5521 fhp = &res.array[5].nfs_resop4_u.opgetfh.object;
5522 5522 if (fhp->nfs_fh4_len == 0) {
5523 5523 /*
5524 5524 * The file exists but a bogus fh
5525 5525 * some unknown reason. Remove it from the dnlc
5526 5526 * and error out to be safe.
5527 5527 */
5528 5528 e.error = ENOENT;
5529 5529 dnlc_remove(dvp, nm);
5530 5530 VN_RELE(*vpp);
5531 5531 *vpp = NULL;
5532 5532 goto exit;
5533 5533 }
5534 5534 sfhp = sfh4_get(fhp, mi);
5535 5535
5536 5536 if (res.array[6].nfs_resop4_u.opgetattr.status == NFS4_OK)
5537 5537 garp = &res.array[6].nfs_resop4_u.opgetattr.ga_res;
5538 5538
5539 5539 /*
5540 5540 * Make the new rnode
5541 5541 */
5542 5542 if (isdotdot) {
5543 5543 e.error = nfs4_make_dotdot(sfhp, t, dvp, cr, &nvp, 1);
5544 5544 if (e.error) {
5545 5545 sfh4_rele(&sfhp);
5546 5546 VN_RELE(*vpp);
5547 5547 *vpp = NULL;
5548 5548 goto exit;
5549 5549 }
5550 5550 /*
5551 5551 * XXX if nfs4_make_dotdot uses an existing rnode
5552 5552 * XXX it doesn't update the attributes.
5553 5553 * XXX for now just save them again to save an OTW
5554 5554 */
5555 5555 nfs4_attr_cache(nvp, garp, t, cr, FALSE, NULL);
5556 5556 } else {
5557 5557 nvp = makenfs4node(sfhp, garp, dvp->v_vfsp, t, cr,
5558 5558 dvp, fn_get(VTOSV(dvp)->sv_name, nm, sfhp));
5559 5559 /*
5560 5560 * If v_type == VNON, then garp was NULL because
5561 5561 * the last op in the compound failed and makenfs4node
5562 5562 * could not find the vnode for sfhp. It created
5563 5563 * a new vnode, so we have nothing to purge here.
5564 5564 */
5565 5565 if (nvp->v_type == VNON) {
5566 5566 vattr_t vattr;
5567 5567
5568 5568 vattr.va_mask = AT_TYPE;
5569 5569 /*
5570 5570 * N.B. We've already called nfs4_end_fop above.
5571 5571 */
5572 5572 e.error = nfs4getattr(nvp, &vattr, cr);
5573 5573 if (e.error) {
5574 5574 sfh4_rele(&sfhp);
5575 5575 VN_RELE(*vpp);
5576 5576 *vpp = NULL;
5577 5577 VN_RELE(nvp);
5578 5578 goto exit;
5579 5579 }
5580 5580 nvp->v_type = vattr.va_type;
5581 5581 }
5582 5582 }
5583 5583 sfh4_rele(&sfhp);
5584 5584
5585 5585 nrp = VTOR4(nvp);
5586 5586 mutex_enter(&nrp->r_statev4_lock);
5587 5587 if (!nrp->created_v4) {
5588 5588 mutex_exit(&nrp->r_statev4_lock);
5589 5589 dnlc_update(dvp, nm, nvp);
5590 5590 } else
5591 5591 mutex_exit(&nrp->r_statev4_lock);
5592 5592
5593 5593 VN_RELE(*vpp);
5594 5594 *vpp = nvp;
5595 5595 } else {
5596 5596 hrtime_t now;
5597 5597 hrtime_t delta = 0;
5598 5598
5599 5599 e.error = 0;
5600 5600
5601 5601 /*
5602 5602 * Because the NVERIFY "succeeded" we know that the
5603 5603 * directory attributes are still valid
5604 5604 * so update r_time_attr_inval
5605 5605 */
5606 5606 now = gethrtime();
5607 5607 mutex_enter(&drp->r_statelock);
5608 5608 if (!(mi->mi_flags & MI4_NOAC) && !(dvp->v_flag & VNOCACHE)) {
5609 5609 delta = now - drp->r_time_attr_saved;
5610 5610 if (delta < mi->mi_acdirmin)
5611 5611 delta = mi->mi_acdirmin;
5612 5612 else if (delta > mi->mi_acdirmax)
5613 5613 delta = mi->mi_acdirmax;
5614 5614 }
5615 5615 drp->r_time_attr_inval = now + delta;
5616 5616 mutex_exit(&drp->r_statelock);
5617 5617 dnlc_update(dvp, nm, *vpp);
5618 5618
5619 5619 /*
5620 5620 * Even though we have a valid directory attr cache
5621 5621 * and dnlc entry, we may not have access.
5622 5622 * This should almost always hit the cache.
5623 5623 */
5624 5624 e.error = nfs4_access(dvp, VEXEC, 0, cr, NULL);
5625 5625 if (e.error) {
5626 5626 VN_RELE(*vpp);
5627 5627 *vpp = NULL;
5628 5628 }
5629 5629
5630 5630 if (*vpp == DNLC_NO_VNODE) {
5631 5631 VN_RELE(*vpp);
5632 5632 *vpp = NULL;
5633 5633 e.error = ENOENT;
5634 5634 }
5635 5635 }
5636 5636
5637 5637 exit:
5638 5638 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
5639 5639 kmem_free(argop, argoplist_size);
5640 5640 (void) check_mnt_secinfo(mi->mi_curr_serv, nvp);
5641 5641 return (e.error);
5642 5642 }
5643 5643
5644 5644 /*
5645 5645 * We need to go over the wire to lookup the name, but
5646 5646 * while we are there verify the directory has not
5647 5647 * changed but if it has, get new attributes and check access
5648 5648 *
5649 5649 * PUTFH dfh SAVEFH LOOKUP nm GETFH GETATTR RESTOREFH
5650 5650 * NVERIFY GETATTR ACCESS
5651 5651 *
5652 5652 * With the results:
5653 5653 * if the NVERIFY failed we must purge the caches, add new attributes,
5654 5654 * and cache new access.
5655 5655 * set a new r_time_attr_inval
5656 5656 * add name to dnlc, possibly negative
5657 5657 * if LOOKUP succeeded
5658 5658 * cache new attributes
5659 5659 */
5660 5660 static int
5661 5661 nfs4lookupnew_otw(vnode_t *dvp, char *nm, vnode_t **vpp, cred_t *cr)
5662 5662 {
5663 5663 COMPOUND4args_clnt args;
5664 5664 COMPOUND4res_clnt res;
5665 5665 fattr4 *ver_fattr;
5666 5666 fattr4_change dchange;
5667 5667 int32_t *ptr;
5668 5668 nfs4_ga_res_t *garp = NULL;
5669 5669 int argoplist_size = 9 * sizeof (nfs_argop4);
5670 5670 nfs_argop4 *argop;
5671 5671 int doqueue;
5672 5672 mntinfo4_t *mi;
5673 5673 nfs4_recov_state_t recov_state;
5674 5674 hrtime_t t;
5675 5675 int isdotdot;
5676 5676 vnode_t *nvp;
5677 5677 nfs_fh4 *fhp;
5678 5678 nfs4_sharedfh_t *sfhp;
5679 5679 nfs4_access_type_t cacc;
5680 5680 rnode4_t *nrp;
5681 5681 rnode4_t *drp = VTOR4(dvp);
5682 5682 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
5683 5683
5684 5684 ASSERT(nfs_zone() == VTOMI4(dvp)->mi_zone);
5685 5685 ASSERT(nm != NULL);
5686 5686 ASSERT(nm[0] != '\0');
5687 5687 ASSERT(dvp->v_type == VDIR);
5688 5688 ASSERT(nm[0] != '.' || nm[1] != '\0');
5689 5689 ASSERT(*vpp == NULL);
5690 5690
5691 5691 if (nm[0] == '.' && nm[1] == '.' && nm[2] == '\0') {
5692 5692 isdotdot = 1;
5693 5693 args.ctag = TAG_LOOKUP_PARENT;
5694 5694 } else {
5695 5695 /*
5696 5696 * If dvp were a stub, it should have triggered and caused
5697 5697 * a mount for us to get this far.
5698 5698 */
5699 5699 ASSERT(!RP_ISSTUB(VTOR4(dvp)));
5700 5700
5701 5701 isdotdot = 0;
5702 5702 args.ctag = TAG_LOOKUP;
5703 5703 }
5704 5704
5705 5705 mi = VTOMI4(dvp);
5706 5706 recov_state.rs_flags = 0;
5707 5707 recov_state.rs_num_retry_despite_err = 0;
5708 5708
5709 5709 nvp = NULL;
5710 5710
5711 5711 /* Save the original mount point security information */
5712 5712 (void) save_mnt_secinfo(mi->mi_curr_serv);
5713 5713
5714 5714 recov_retry:
5715 5715 e.error = nfs4_start_fop(mi, dvp, NULL, OH_LOOKUP,
5716 5716 &recov_state, NULL);
5717 5717 if (e.error) {
5718 5718 (void) check_mnt_secinfo(mi->mi_curr_serv, nvp);
5719 5719 return (e.error);
5720 5720 }
5721 5721
5722 5722 argop = kmem_alloc(argoplist_size, KM_SLEEP);
5723 5723
5724 5724 /* PUTFH SAVEFH LOOKUP GETFH GETATTR RESTOREFH NVERIFY GETATTR ACCESS */
5725 5725 args.array_len = 9;
5726 5726 args.array = argop;
5727 5727
5728 5728 /* 0. putfh file */
5729 5729 argop[0].argop = OP_CPUTFH;
5730 5730 argop[0].nfs_argop4_u.opcputfh.sfh = VTOR4(dvp)->r_fh;
5731 5731
5732 5732 /* 1. savefh for the nverify */
5733 5733 argop[1].argop = OP_SAVEFH;
5734 5734
5735 5735 /* 2. lookup name */
5736 5736 if (isdotdot) {
5737 5737 argop[2].argop = OP_LOOKUPP;
5738 5738 } else {
5739 5739 argop[2].argop = OP_CLOOKUP;
5740 5740 argop[2].nfs_argop4_u.opclookup.cname = nm;
5741 5741 }
5742 5742
5743 5743 /* 3. resulting file handle */
5744 5744 argop[3].argop = OP_GETFH;
5745 5745
5746 5746 /* 4. resulting file attributes */
5747 5747 argop[4].argop = OP_GETATTR;
5748 5748 argop[4].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
5749 5749 argop[4].nfs_argop4_u.opgetattr.mi = VTOMI4(dvp);
5750 5750
5751 5751 /* 5. restorefh back the directory for the nverify */
5752 5752 argop[5].argop = OP_RESTOREFH;
5753 5753
5754 5754 /* 6. nverify the change info */
5755 5755 argop[6].argop = OP_NVERIFY;
5756 5756 ver_fattr = &argop[6].nfs_argop4_u.opnverify.obj_attributes;
5757 5757 ver_fattr->attrmask = FATTR4_CHANGE_MASK;
5758 5758 ver_fattr->attrlist4 = (char *)&dchange;
5759 5759 ptr = (int32_t *)&dchange;
5760 5760 IXDR_PUT_HYPER(ptr, VTOR4(dvp)->r_change);
5761 5761 ver_fattr->attrlist4_len = sizeof (fattr4_change);
5762 5762
5763 5763 /* 7. getattr directory */
5764 5764 argop[7].argop = OP_GETATTR;
5765 5765 argop[7].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
5766 5766 argop[7].nfs_argop4_u.opgetattr.mi = VTOMI4(dvp);
5767 5767
5768 5768 /* 8. access directory */
5769 5769 argop[8].argop = OP_ACCESS;
5770 5770 argop[8].nfs_argop4_u.opaccess.access = ACCESS4_READ | ACCESS4_DELETE |
5771 5771 ACCESS4_MODIFY | ACCESS4_EXTEND | ACCESS4_LOOKUP;
5772 5772
5773 5773 doqueue = 1;
5774 5774 t = gethrtime();
5775 5775
5776 5776 rfs4call(VTOMI4(dvp), &args, &res, cr, &doqueue, 0, &e);
5777 5777
5778 5778 if (!isdotdot && res.status == NFS4ERR_MOVED) {
5779 5779 e.error = nfs4_setup_referral(dvp, nm, vpp, cr);
5780 5780 if (e.error != 0 && *vpp != NULL)
5781 5781 VN_RELE(*vpp);
5782 5782 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP,
5783 5783 &recov_state, FALSE);
5784 5784 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
5785 5785 kmem_free(argop, argoplist_size);
5786 5786 return (e.error);
5787 5787 }
5788 5788
5789 5789 if (nfs4_needs_recovery(&e, FALSE, dvp->v_vfsp)) {
5790 5790 /*
5791 5791 * For WRONGSEC of a non-dotdot case, send secinfo directly
5792 5792 * from this thread, do not go thru the recovery thread since
5793 5793 * we need the nm information.
5794 5794 *
5795 5795 * Not doing dotdot case because there is no specification
5796 5796 * for (PUTFH, SECINFO "..") yet.
5797 5797 */
5798 5798 if (!isdotdot && res.status == NFS4ERR_WRONGSEC) {
5799 5799 if ((e.error = nfs4_secinfo_vnode_otw(dvp, nm, cr)))
5800 5800 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP,
5801 5801 &recov_state, FALSE);
5802 5802 else
5803 5803 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP,
5804 5804 &recov_state, TRUE);
5805 5805 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
5806 5806 kmem_free(argop, argoplist_size);
5807 5807 if (!e.error)
5808 5808 goto recov_retry;
5809 5809 (void) check_mnt_secinfo(mi->mi_curr_serv, nvp);
5810 5810 return (e.error);
5811 5811 }
5812 5812
5813 5813 if (nfs4_start_recovery(&e, mi, dvp, NULL, NULL, NULL,
5814 5814 OP_LOOKUP, NULL, NULL, NULL) == FALSE) {
5815 5815 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP,
5816 5816 &recov_state, TRUE);
5817 5817
5818 5818 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
5819 5819 kmem_free(argop, argoplist_size);
5820 5820 goto recov_retry;
5821 5821 }
5822 5822 }
5823 5823
5824 5824 nfs4_end_fop(mi, dvp, NULL, OH_LOOKUP, &recov_state, FALSE);
5825 5825
5826 5826 if (e.error || res.array_len == 0) {
5827 5827 /*
5828 5828 * If e.error isn't set, then reply has no ops (or we couldn't
5829 5829 * be here). The only legal way to reply without an op array
5830 5830 * is via NFS4ERR_MINOR_VERS_MISMATCH. An ops array should
5831 5831 * be in the reply for all other status values.
5832 5832 *
5833 5833 * For valid replies without an ops array, return ENOTSUP
5834 5834 * (geterrno4 xlation of VERS_MISMATCH). For illegal replies,
5835 5835 * return EIO -- don't trust status.
5836 5836 */
5837 5837 if (e.error == 0)
5838 5838 e.error = (res.status == NFS4ERR_MINOR_VERS_MISMATCH) ?
5839 5839 ENOTSUP : EIO;
5840 5840
5841 5841 kmem_free(argop, argoplist_size);
5842 5842 (void) check_mnt_secinfo(mi->mi_curr_serv, nvp);
5843 5843 return (e.error);
5844 5844 }
5845 5845
5846 5846 e.error = geterrno4(res.status);
5847 5847
5848 5848 /*
5849 5849 * The PUTFH and SAVEFH may have failed.
5850 5850 */
5851 5851 if ((res.array[0].nfs_resop4_u.opputfh.status != NFS4_OK) ||
5852 5852 (res.array[1].nfs_resop4_u.opsavefh.status != NFS4_OK)) {
5853 5853 nfs4_purge_stale_fh(e.error, dvp, cr);
5854 5854 goto exit;
5855 5855 }
5856 5856
5857 5857 /*
5858 5858 * Check if the file exists, if it does delay entering
5859 5859 * into the dnlc until after we update the directory
5860 5860 * attributes so we don't cause it to get purged immediately.
5861 5861 */
5862 5862 if (res.array[2].nfs_resop4_u.oplookup.status != NFS4_OK) {
5863 5863 /*
5864 5864 * The lookup failed, probably no entry
5865 5865 */
5866 5866 if (e.error == ENOENT && nfs4_lookup_neg_cache)
5867 5867 dnlc_update(dvp, nm, DNLC_NO_VNODE);
5868 5868 goto exit;
5869 5869 }
5870 5870
5871 5871 if (res.array[3].nfs_resop4_u.opgetfh.status != NFS4_OK) {
5872 5872 /*
5873 5873 * The file exists but we can't get its fh for
5874 5874 * some unknown reason. Error out to be safe.
5875 5875 */
5876 5876 goto exit;
5877 5877 }
5878 5878
5879 5879 fhp = &res.array[3].nfs_resop4_u.opgetfh.object;
5880 5880 if (fhp->nfs_fh4_len == 0) {
5881 5881 /*
5882 5882 * The file exists but a bogus fh
5883 5883 * some unknown reason. Error out to be safe.
5884 5884 */
5885 5885 e.error = EIO;
5886 5886 goto exit;
5887 5887 }
5888 5888 sfhp = sfh4_get(fhp, mi);
5889 5889
5890 5890 if (res.array[4].nfs_resop4_u.opgetattr.status != NFS4_OK) {
5891 5891 sfh4_rele(&sfhp);
5892 5892 goto exit;
5893 5893 }
5894 5894 garp = &res.array[4].nfs_resop4_u.opgetattr.ga_res;
5895 5895
5896 5896 /*
5897 5897 * The RESTOREFH may have failed
5898 5898 */
5899 5899 if (res.array[5].nfs_resop4_u.oprestorefh.status != NFS4_OK) {
5900 5900 sfh4_rele(&sfhp);
5901 5901 e.error = EIO;
5902 5902 goto exit;
5903 5903 }
5904 5904
5905 5905 if (res.array[6].nfs_resop4_u.opnverify.status != NFS4ERR_SAME) {
5906 5906 /*
5907 5907 * First make sure the NVERIFY failed as we expected,
5908 5908 * if it didn't then be conservative and error out
5909 5909 * as we can't trust the directory.
5910 5910 */
5911 5911 if (res.array[6].nfs_resop4_u.opnverify.status != NFS4_OK) {
5912 5912 sfh4_rele(&sfhp);
5913 5913 e.error = EIO;
5914 5914 goto exit;
5915 5915 }
5916 5916
5917 5917 /*
5918 5918 * We know the NVERIFY "failed" so the directory has changed,
5919 5919 * so we must:
5920 5920 * purge the caches (access and indirectly dnlc if needed)
5921 5921 */
5922 5922 nfs4_purge_caches(dvp, NFS4_NOPURGE_DNLC, cr, TRUE);
5923 5923
5924 5924 if (res.array[7].nfs_resop4_u.opgetattr.status != NFS4_OK) {
5925 5925 sfh4_rele(&sfhp);
5926 5926 goto exit;
5927 5927 }
5928 5928 nfs4_attr_cache(dvp,
5929 5929 &res.array[7].nfs_resop4_u.opgetattr.ga_res,
5930 5930 t, cr, FALSE, NULL);
5931 5931
5932 5932 if (res.array[8].nfs_resop4_u.opaccess.status != NFS4_OK) {
5933 5933 nfs4_purge_stale_fh(e.error, dvp, cr);
5934 5934 sfh4_rele(&sfhp);
5935 5935 e.error = geterrno4(res.status);
5936 5936 goto exit;
5937 5937 }
5938 5938
5939 5939 /*
5940 5940 * Now we know the directory is valid,
5941 5941 * cache new directory access
5942 5942 */
5943 5943 nfs4_access_cache(drp,
5944 5944 args.array[8].nfs_argop4_u.opaccess.access,
5945 5945 res.array[8].nfs_resop4_u.opaccess.access, cr);
5946 5946
5947 5947 /*
5948 5948 * recheck VEXEC access
5949 5949 */
5950 5950 cacc = nfs4_access_check(drp, ACCESS4_LOOKUP, cr);
5951 5951 if (cacc != NFS4_ACCESS_ALLOWED) {
5952 5952 /*
5953 5953 * Directory permissions might have been revoked
5954 5954 */
5955 5955 if (cacc == NFS4_ACCESS_DENIED) {
5956 5956 sfh4_rele(&sfhp);
5957 5957 e.error = EACCES;
5958 5958 goto exit;
5959 5959 }
5960 5960
5961 5961 /*
5962 5962 * Somehow we must not have asked for enough
5963 5963 * so try a singleton ACCESS should never happen
5964 5964 */
5965 5965 e.error = nfs4_access(dvp, VEXEC, 0, cr, NULL);
5966 5966 if (e.error) {
5967 5967 sfh4_rele(&sfhp);
5968 5968 goto exit;
5969 5969 }
5970 5970 }
5971 5971
5972 5972 e.error = geterrno4(res.status);
5973 5973 } else {
5974 5974 hrtime_t now;
5975 5975 hrtime_t delta = 0;
5976 5976
5977 5977 e.error = 0;
5978 5978
5979 5979 /*
5980 5980 * Because the NVERIFY "succeeded" we know that the
5981 5981 * directory attributes are still valid
5982 5982 * so update r_time_attr_inval
5983 5983 */
5984 5984 now = gethrtime();
5985 5985 mutex_enter(&drp->r_statelock);
5986 5986 if (!(mi->mi_flags & MI4_NOAC) && !(dvp->v_flag & VNOCACHE)) {
5987 5987 delta = now - drp->r_time_attr_saved;
5988 5988 if (delta < mi->mi_acdirmin)
5989 5989 delta = mi->mi_acdirmin;
5990 5990 else if (delta > mi->mi_acdirmax)
5991 5991 delta = mi->mi_acdirmax;
5992 5992 }
5993 5993 drp->r_time_attr_inval = now + delta;
5994 5994 mutex_exit(&drp->r_statelock);
5995 5995
5996 5996 /*
5997 5997 * Even though we have a valid directory attr cache,
5998 5998 * we may not have access.
5999 5999 * This should almost always hit the cache.
6000 6000 */
6001 6001 e.error = nfs4_access(dvp, VEXEC, 0, cr, NULL);
6002 6002 if (e.error) {
6003 6003 sfh4_rele(&sfhp);
6004 6004 goto exit;
6005 6005 }
6006 6006 }
6007 6007
6008 6008 /*
6009 6009 * Now we have successfully completed the lookup, if the
6010 6010 * directory has changed we now have the valid attributes.
6011 6011 * We also know we have directory access.
6012 6012 * Create the new rnode and insert it in the dnlc.
6013 6013 */
6014 6014 if (isdotdot) {
6015 6015 e.error = nfs4_make_dotdot(sfhp, t, dvp, cr, &nvp, 1);
6016 6016 if (e.error) {
6017 6017 sfh4_rele(&sfhp);
6018 6018 goto exit;
6019 6019 }
6020 6020 /*
6021 6021 * XXX if nfs4_make_dotdot uses an existing rnode
6022 6022 * XXX it doesn't update the attributes.
6023 6023 * XXX for now just save them again to save an OTW
6024 6024 */
6025 6025 nfs4_attr_cache(nvp, garp, t, cr, FALSE, NULL);
6026 6026 } else {
6027 6027 nvp = makenfs4node(sfhp, garp, dvp->v_vfsp, t, cr,
6028 6028 dvp, fn_get(VTOSV(dvp)->sv_name, nm, sfhp));
6029 6029 }
6030 6030 sfh4_rele(&sfhp);
6031 6031
6032 6032 nrp = VTOR4(nvp);
6033 6033 mutex_enter(&nrp->r_statev4_lock);
6034 6034 if (!nrp->created_v4) {
6035 6035 mutex_exit(&nrp->r_statev4_lock);
6036 6036 dnlc_update(dvp, nm, nvp);
6037 6037 } else
6038 6038 mutex_exit(&nrp->r_statev4_lock);
6039 6039
6040 6040 *vpp = nvp;
6041 6041
6042 6042 exit:
6043 6043 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
6044 6044 kmem_free(argop, argoplist_size);
6045 6045 (void) check_mnt_secinfo(mi->mi_curr_serv, nvp);
6046 6046 return (e.error);
6047 6047 }
6048 6048
6049 6049 #ifdef DEBUG
6050 6050 void
6051 6051 nfs4lookup_dump_compound(char *where, nfs_argop4 *argbase, int argcnt)
6052 6052 {
6053 6053 uint_t i, len;
6054 6054 zoneid_t zoneid = getzoneid();
6055 6055 char *s;
6056 6056
6057 6057 zcmn_err(zoneid, CE_NOTE, "%s: dumping cmpd", where);
6058 6058 for (i = 0; i < argcnt; i++) {
6059 6059 nfs_argop4 *op = &argbase[i];
6060 6060 switch (op->argop) {
6061 6061 case OP_CPUTFH:
6062 6062 case OP_PUTFH:
6063 6063 zcmn_err(zoneid, CE_NOTE, "\t op %d, putfh", i);
6064 6064 break;
6065 6065 case OP_PUTROOTFH:
6066 6066 zcmn_err(zoneid, CE_NOTE, "\t op %d, putrootfh", i);
6067 6067 break;
6068 6068 case OP_CLOOKUP:
6069 6069 s = op->nfs_argop4_u.opclookup.cname;
6070 6070 zcmn_err(zoneid, CE_NOTE, "\t op %d, lookup %s", i, s);
6071 6071 break;
6072 6072 case OP_LOOKUP:
6073 6073 s = utf8_to_str(&op->nfs_argop4_u.oplookup.objname,
6074 6074 &len, NULL);
6075 6075 zcmn_err(zoneid, CE_NOTE, "\t op %d, lookup %s", i, s);
6076 6076 kmem_free(s, len);
6077 6077 break;
6078 6078 case OP_LOOKUPP:
6079 6079 zcmn_err(zoneid, CE_NOTE, "\t op %d, lookupp ..", i);
6080 6080 break;
6081 6081 case OP_GETFH:
6082 6082 zcmn_err(zoneid, CE_NOTE, "\t op %d, getfh", i);
6083 6083 break;
6084 6084 case OP_GETATTR:
6085 6085 zcmn_err(zoneid, CE_NOTE, "\t op %d, getattr", i);
6086 6086 break;
6087 6087 case OP_OPENATTR:
6088 6088 zcmn_err(zoneid, CE_NOTE, "\t op %d, openattr", i);
6089 6089 break;
6090 6090 default:
6091 6091 zcmn_err(zoneid, CE_NOTE, "\t op %d, opcode %d", i,
6092 6092 op->argop);
6093 6093 break;
6094 6094 }
6095 6095 }
6096 6096 }
6097 6097 #endif
6098 6098
6099 6099 /*
6100 6100 * nfs4lookup_setup - constructs a multi-lookup compound request.
6101 6101 *
6102 6102 * Given the path "nm1/nm2/.../nmn", the following compound requests
6103 6103 * may be created:
6104 6104 *
6105 6105 * Note: Getfh is not be needed because filehandle attr is mandatory, but it
6106 6106 * is faster, for now.
6107 6107 *
6108 6108 * l4_getattrs indicates the type of compound requested.
6109 6109 *
6110 6110 * LKP4_NO_ATTRIBUTE - no attributes (used by secinfo):
6111 6111 *
6112 6112 * compound { Put*fh; Lookup {nm1}; Lookup {nm2}; ... Lookup {nmn} }
6113 6113 *
6114 6114 * total number of ops is n + 1.
6115 6115 *
6116 6116 * LKP4_LAST_NAMED_ATTR - multi-component path for a named
6117 6117 * attribute: create lookups plus one OPENATTR/GETFH/GETATTR
6118 6118 * before the last component, and only get attributes
6119 6119 * for the last component. Note that the second-to-last
6120 6120 * pathname component is XATTR_RPATH, which does NOT go
6121 6121 * over-the-wire as a lookup.
6122 6122 *
6123 6123 * compound { Put*fh; Lookup {nm1}; Lookup {nm2}; ... Lookup {nmn-2};
6124 6124 * Openattr; Getfh; Getattr; Lookup {nmn}; Getfh; Getattr }
6125 6125 *
6126 6126 * and total number of ops is n + 5.
6127 6127 *
6128 6128 * LKP4_LAST_ATTRDIR - multi-component path for the hidden named
6129 6129 * attribute directory: create lookups plus an OPENATTR
6130 6130 * replacing the last lookup. Note that the last pathname
6131 6131 * component is XATTR_RPATH, which does NOT go over-the-wire
6132 6132 * as a lookup.
6133 6133 *
6134 6134 * compound { Put*fh; Lookup {nm1}; Lookup {nm2}; ... Getfh; Getattr;
6135 6135 * Openattr; Getfh; Getattr }
6136 6136 *
6137 6137 * and total number of ops is n + 5.
6138 6138 *
6139 6139 * LKP4_ALL_ATTRIBUTES - create lookups and get attributes for intermediate
6140 6140 * nodes too.
6141 6141 *
6142 6142 * compound { Put*fh; Lookup {nm1}; Getfh; Getattr;
6143 6143 * Lookup {nm2}; ... Lookup {nmn}; Getfh; Getattr }
6144 6144 *
6145 6145 * and total number of ops is 3*n + 1.
6146 6146 *
6147 6147 * All cases: returns the index in the arg array of the final LOOKUP op, or
6148 6148 * -1 if no LOOKUPs were used.
6149 6149 */
6150 6150 int
6151 6151 nfs4lookup_setup(char *nm, lookup4_param_t *lookupargp, int needgetfh)
6152 6152 {
6153 6153 enum lkp4_attr_setup l4_getattrs = lookupargp->l4_getattrs;
6154 6154 nfs_argop4 *argbase, *argop;
6155 6155 int arglen, argcnt;
6156 6156 int n = 1; /* number of components */
6157 6157 int nga = 1; /* number of Getattr's in request */
6158 6158 char c = '\0', *s, *p;
6159 6159 int lookup_idx = -1;
6160 6160 int argoplist_size;
6161 6161
6162 6162 /* set lookuparg response result to 0 */
6163 6163 lookupargp->resp->status = NFS4_OK;
6164 6164
6165 6165 /* skip leading "/" or "." e.g. ".//./" if there is */
6166 6166 for (; ; nm++) {
6167 6167 if (*nm != '/' && *nm != '.')
6168 6168 break;
6169 6169
6170 6170 /* ".." is counted as 1 component */
6171 6171 if (*nm == '.' && *(nm + 1) != '/')
6172 6172 break;
6173 6173 }
6174 6174
6175 6175 /*
6176 6176 * Find n = number of components - nm must be null terminated
6177 6177 * Skip "." components.
6178 6178 */
6179 6179 if (*nm != '\0')
6180 6180 for (n = 1, s = nm; *s != '\0'; s++) {
6181 6181 if ((*s == '/') && (*(s + 1) != '/') &&
6182 6182 (*(s + 1) != '\0') &&
6183 6183 !(*(s + 1) == '.' && (*(s + 2) == '/' ||
6184 6184 *(s + 2) == '\0')))
6185 6185 n++;
6186 6186 }
6187 6187 else
6188 6188 n = 0;
6189 6189
6190 6190 /*
6191 6191 * nga is number of components that need Getfh+Getattr
6192 6192 */
6193 6193 switch (l4_getattrs) {
6194 6194 case LKP4_NO_ATTRIBUTES:
6195 6195 nga = 0;
6196 6196 break;
6197 6197 case LKP4_ALL_ATTRIBUTES:
6198 6198 nga = n;
6199 6199 /*
6200 6200 * Always have at least 1 getfh, getattr pair
6201 6201 */
6202 6202 if (nga == 0)
6203 6203 nga++;
6204 6204 break;
6205 6205 case LKP4_LAST_ATTRDIR:
6206 6206 case LKP4_LAST_NAMED_ATTR:
6207 6207 nga = n+1;
6208 6208 break;
6209 6209 }
6210 6210
6211 6211 /*
6212 6212 * If change to use the filehandle attr instead of getfh
6213 6213 * the following line can be deleted.
6214 6214 */
6215 6215 nga *= 2;
6216 6216
6217 6217 /*
6218 6218 * calculate number of ops in request as
6219 6219 * header + trailer + lookups + getattrs
6220 6220 */
6221 6221 arglen = lookupargp->header_len + lookupargp->trailer_len + n + nga;
6222 6222
6223 6223 argoplist_size = arglen * sizeof (nfs_argop4);
6224 6224 argop = argbase = kmem_alloc(argoplist_size, KM_SLEEP);
6225 6225 lookupargp->argsp->array = argop;
6226 6226
6227 6227 argcnt = lookupargp->header_len;
6228 6228 argop += argcnt;
6229 6229
6230 6230 /*
6231 6231 * loop and create a lookup op and possibly getattr/getfh for
6232 6232 * each component. Skip "." components.
6233 6233 */
6234 6234 for (s = nm; *s != '\0'; s = p) {
6235 6235 /*
6236 6236 * Set up a pathname struct for each component if needed
6237 6237 */
6238 6238 while (*s == '/')
6239 6239 s++;
6240 6240 if (*s == '\0')
6241 6241 break;
6242 6242
6243 6243 for (p = s; (*p != '/') && (*p != '\0'); p++)
6244 6244 ;
6245 6245 c = *p;
6246 6246 *p = '\0';
6247 6247
6248 6248 if (s[0] == '.' && s[1] == '\0') {
6249 6249 *p = c;
6250 6250 continue;
6251 6251 }
6252 6252 if (l4_getattrs == LKP4_LAST_ATTRDIR &&
6253 6253 strcmp(s, XATTR_RPATH) == 0) {
6254 6254 /* getfh XXX may not be needed in future */
6255 6255 argop->argop = OP_GETFH;
6256 6256 argop++;
6257 6257 argcnt++;
6258 6258
6259 6259 /* getattr */
6260 6260 argop->argop = OP_GETATTR;
6261 6261 argop->nfs_argop4_u.opgetattr.attr_request =
6262 6262 lookupargp->ga_bits;
6263 6263 argop->nfs_argop4_u.opgetattr.mi =
6264 6264 lookupargp->mi;
6265 6265 argop++;
6266 6266 argcnt++;
6267 6267
6268 6268 /* openattr */
6269 6269 argop->argop = OP_OPENATTR;
6270 6270 } else if (l4_getattrs == LKP4_LAST_NAMED_ATTR &&
6271 6271 strcmp(s, XATTR_RPATH) == 0) {
6272 6272 /* openattr */
6273 6273 argop->argop = OP_OPENATTR;
6274 6274 argop++;
6275 6275 argcnt++;
6276 6276
6277 6277 /* getfh XXX may not be needed in future */
6278 6278 argop->argop = OP_GETFH;
6279 6279 argop++;
6280 6280 argcnt++;
6281 6281
6282 6282 /* getattr */
6283 6283 argop->argop = OP_GETATTR;
6284 6284 argop->nfs_argop4_u.opgetattr.attr_request =
6285 6285 lookupargp->ga_bits;
6286 6286 argop->nfs_argop4_u.opgetattr.mi =
6287 6287 lookupargp->mi;
6288 6288 argop++;
6289 6289 argcnt++;
6290 6290 *p = c;
6291 6291 continue;
6292 6292 } else if (s[0] == '.' && s[1] == '.' && s[2] == '\0') {
6293 6293 /* lookupp */
6294 6294 argop->argop = OP_LOOKUPP;
6295 6295 } else {
6296 6296 /* lookup */
6297 6297 argop->argop = OP_LOOKUP;
6298 6298 (void) str_to_utf8(s,
6299 6299 &argop->nfs_argop4_u.oplookup.objname);
6300 6300 }
6301 6301 lookup_idx = argcnt;
6302 6302 argop++;
6303 6303 argcnt++;
6304 6304
6305 6305 *p = c;
6306 6306
6307 6307 if (l4_getattrs == LKP4_ALL_ATTRIBUTES) {
6308 6308 /* getfh XXX may not be needed in future */
6309 6309 argop->argop = OP_GETFH;
6310 6310 argop++;
6311 6311 argcnt++;
6312 6312
6313 6313 /* getattr */
6314 6314 argop->argop = OP_GETATTR;
6315 6315 argop->nfs_argop4_u.opgetattr.attr_request =
6316 6316 lookupargp->ga_bits;
6317 6317 argop->nfs_argop4_u.opgetattr.mi =
6318 6318 lookupargp->mi;
6319 6319 argop++;
6320 6320 argcnt++;
6321 6321 }
6322 6322 }
6323 6323
6324 6324 if ((l4_getattrs != LKP4_NO_ATTRIBUTES) &&
6325 6325 ((l4_getattrs != LKP4_ALL_ATTRIBUTES) || (lookup_idx < 0))) {
6326 6326 if (needgetfh) {
6327 6327 /* stick in a post-lookup getfh */
6328 6328 argop->argop = OP_GETFH;
6329 6329 argcnt++;
6330 6330 argop++;
6331 6331 }
6332 6332 /* post-lookup getattr */
6333 6333 argop->argop = OP_GETATTR;
6334 6334 argop->nfs_argop4_u.opgetattr.attr_request =
6335 6335 lookupargp->ga_bits;
6336 6336 argop->nfs_argop4_u.opgetattr.mi = lookupargp->mi;
6337 6337 argcnt++;
6338 6338 }
6339 6339 argcnt += lookupargp->trailer_len; /* actual op count */
6340 6340 lookupargp->argsp->array_len = argcnt;
6341 6341 lookupargp->arglen = arglen;
6342 6342
6343 6343 #ifdef DEBUG
6344 6344 if (nfs4_client_lookup_debug)
6345 6345 nfs4lookup_dump_compound("nfs4lookup_setup", argbase, argcnt);
6346 6346 #endif
6347 6347
6348 6348 return (lookup_idx);
6349 6349 }
6350 6350
6351 6351 static int
6352 6352 nfs4openattr(vnode_t *dvp, vnode_t **avp, int cflag, cred_t *cr)
6353 6353 {
6354 6354 COMPOUND4args_clnt args;
6355 6355 COMPOUND4res_clnt res;
6356 6356 GETFH4res *gf_res = NULL;
6357 6357 nfs_argop4 argop[4];
6358 6358 nfs_resop4 *resop = NULL;
6359 6359 nfs4_sharedfh_t *sfhp;
6360 6360 hrtime_t t;
6361 6361 nfs4_error_t e;
6362 6362
6363 6363 rnode4_t *drp;
6364 6364 int doqueue = 1;
6365 6365 vnode_t *vp;
6366 6366 int needrecov = 0;
6367 6367 nfs4_recov_state_t recov_state;
6368 6368
6369 6369 ASSERT(nfs_zone() == VTOMI4(dvp)->mi_zone);
6370 6370
6371 6371 *avp = NULL;
6372 6372 recov_state.rs_flags = 0;
6373 6373 recov_state.rs_num_retry_despite_err = 0;
6374 6374
6375 6375 recov_retry:
6376 6376 /* COMPOUND: putfh, openattr, getfh, getattr */
6377 6377 args.array_len = 4;
6378 6378 args.array = argop;
6379 6379 args.ctag = TAG_OPENATTR;
6380 6380
6381 6381 e.error = nfs4_start_op(VTOMI4(dvp), dvp, NULL, &recov_state);
6382 6382 if (e.error)
6383 6383 return (e.error);
6384 6384
6385 6385 drp = VTOR4(dvp);
6386 6386
6387 6387 /* putfh */
6388 6388 argop[0].argop = OP_CPUTFH;
6389 6389 argop[0].nfs_argop4_u.opcputfh.sfh = drp->r_fh;
6390 6390
6391 6391 /* openattr */
6392 6392 argop[1].argop = OP_OPENATTR;
6393 6393 argop[1].nfs_argop4_u.opopenattr.createdir = (cflag ? TRUE : FALSE);
6394 6394
6395 6395 /* getfh */
6396 6396 argop[2].argop = OP_GETFH;
6397 6397
6398 6398 /* getattr */
6399 6399 argop[3].argop = OP_GETATTR;
6400 6400 argop[3].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
6401 6401 argop[3].nfs_argop4_u.opgetattr.mi = VTOMI4(dvp);
6402 6402
6403 6403 NFS4_DEBUG(nfs4_client_call_debug, (CE_NOTE,
6404 6404 "nfs4openattr: %s call, drp %s", needrecov ? "recov" : "first",
6405 6405 rnode4info(drp)));
6406 6406
6407 6407 t = gethrtime();
6408 6408
6409 6409 rfs4call(VTOMI4(dvp), &args, &res, cr, &doqueue, 0, &e);
6410 6410
6411 6411 needrecov = nfs4_needs_recovery(&e, FALSE, dvp->v_vfsp);
6412 6412 if (needrecov) {
6413 6413 bool_t abort;
6414 6414
6415 6415 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
6416 6416 "nfs4openattr: initiating recovery\n"));
6417 6417
6418 6418 abort = nfs4_start_recovery(&e,
6419 6419 VTOMI4(dvp), dvp, NULL, NULL, NULL,
6420 6420 OP_OPENATTR, NULL, NULL, NULL);
6421 6421 nfs4_end_op(VTOMI4(dvp), dvp, NULL, &recov_state, needrecov);
6422 6422 if (!e.error) {
6423 6423 e.error = geterrno4(res.status);
6424 6424 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
6425 6425 }
6426 6426 if (abort == FALSE)
6427 6427 goto recov_retry;
6428 6428 return (e.error);
6429 6429 }
6430 6430
6431 6431 if (e.error) {
6432 6432 nfs4_end_op(VTOMI4(dvp), dvp, NULL, &recov_state, needrecov);
6433 6433 return (e.error);
6434 6434 }
6435 6435
6436 6436 if (res.status) {
6437 6437 /*
6438 6438 * If OTW errro is NOTSUPP, then it should be
6439 6439 * translated to EINVAL. All Solaris file system
6440 6440 * implementations return EINVAL to the syscall layer
6441 6441 * when the attrdir cannot be created due to an
6442 6442 * implementation restriction or noxattr mount option.
6443 6443 */
6444 6444 if (res.status == NFS4ERR_NOTSUPP) {
6445 6445 mutex_enter(&drp->r_statelock);
6446 6446 if (drp->r_xattr_dir)
6447 6447 VN_RELE(drp->r_xattr_dir);
6448 6448 VN_HOLD(NFS4_XATTR_DIR_NOTSUPP);
6449 6449 drp->r_xattr_dir = NFS4_XATTR_DIR_NOTSUPP;
6450 6450 mutex_exit(&drp->r_statelock);
6451 6451
6452 6452 e.error = EINVAL;
6453 6453 } else {
6454 6454 e.error = geterrno4(res.status);
6455 6455 }
6456 6456
6457 6457 if (e.error) {
6458 6458 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
6459 6459 nfs4_end_op(VTOMI4(dvp), dvp, NULL, &recov_state,
6460 6460 needrecov);
6461 6461 return (e.error);
6462 6462 }
6463 6463 }
6464 6464
6465 6465 resop = &res.array[0]; /* putfh res */
6466 6466 ASSERT(resop->nfs_resop4_u.opgetfh.status == NFS4_OK);
6467 6467
6468 6468 resop = &res.array[1]; /* openattr res */
6469 6469 ASSERT(resop->nfs_resop4_u.opopenattr.status == NFS4_OK);
6470 6470
6471 6471 resop = &res.array[2]; /* getfh res */
6472 6472 gf_res = &resop->nfs_resop4_u.opgetfh;
6473 6473 if (gf_res->object.nfs_fh4_len == 0) {
6474 6474 *avp = NULL;
6475 6475 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
6476 6476 nfs4_end_op(VTOMI4(dvp), dvp, NULL, &recov_state, needrecov);
6477 6477 return (ENOENT);
6478 6478 }
6479 6479
6480 6480 sfhp = sfh4_get(&gf_res->object, VTOMI4(dvp));
6481 6481 vp = makenfs4node(sfhp, &res.array[3].nfs_resop4_u.opgetattr.ga_res,
6482 6482 dvp->v_vfsp, t, cr, dvp,
6483 6483 fn_get(VTOSV(dvp)->sv_name, XATTR_RPATH, sfhp));
6484 6484 sfh4_rele(&sfhp);
6485 6485
6486 6486 if (e.error)
6487 6487 PURGE_ATTRCACHE4(vp);
6488 6488
6489 6489 mutex_enter(&vp->v_lock);
6490 6490 vp->v_flag |= V_XATTRDIR;
6491 6491 mutex_exit(&vp->v_lock);
6492 6492
6493 6493 *avp = vp;
6494 6494
6495 6495 mutex_enter(&drp->r_statelock);
6496 6496 if (drp->r_xattr_dir)
6497 6497 VN_RELE(drp->r_xattr_dir);
6498 6498 VN_HOLD(vp);
6499 6499 drp->r_xattr_dir = vp;
6500 6500
6501 6501 /*
6502 6502 * Invalidate pathconf4 cache because r_xattr_dir is no longer
6503 6503 * NULL. xattrs could be created at any time, and we have no
6504 6504 * way to update pc4_xattr_exists in the base object if/when
6505 6505 * it happens.
6506 6506 */
6507 6507 drp->r_pathconf.pc4_xattr_valid = 0;
6508 6508
6509 6509 mutex_exit(&drp->r_statelock);
6510 6510
6511 6511 nfs4_end_op(VTOMI4(dvp), dvp, NULL, &recov_state, needrecov);
6512 6512
6513 6513 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
6514 6514
6515 6515 return (0);
6516 6516 }
6517 6517
6518 6518 /* ARGSUSED */
6519 6519 static int
6520 6520 nfs4_create(vnode_t *dvp, char *nm, struct vattr *va, enum vcexcl exclusive,
6521 6521 int mode, vnode_t **vpp, cred_t *cr, int flags, caller_context_t *ct,
6522 6522 vsecattr_t *vsecp)
6523 6523 {
6524 6524 int error;
6525 6525 vnode_t *vp = NULL;
6526 6526 rnode4_t *rp;
6527 6527 struct vattr vattr;
6528 6528 rnode4_t *drp;
6529 6529 vnode_t *tempvp;
6530 6530 enum createmode4 createmode;
6531 6531 bool_t must_trunc = FALSE;
6532 6532 int truncating = 0;
6533 6533
6534 6534 if (nfs_zone() != VTOMI4(dvp)->mi_zone)
6535 6535 return (EPERM);
6536 6536 if (exclusive == EXCL && (dvp->v_flag & V_XATTRDIR)) {
6537 6537 return (EINVAL);
6538 6538 }
6539 6539
6540 6540 /* . and .. have special meaning in the protocol, reject them. */
6541 6541
6542 6542 if (nm[0] == '.' && (nm[1] == '\0' || (nm[1] == '.' && nm[2] == '\0')))
6543 6543 return (EISDIR);
6544 6544
6545 6545 drp = VTOR4(dvp);
6546 6546
6547 6547 if (nfs_rw_enter_sig(&drp->r_rwlock, RW_WRITER, INTR4(dvp)))
6548 6548 return (EINTR);
6549 6549
6550 6550 top:
6551 6551 /*
6552 6552 * We make a copy of the attributes because the caller does not
6553 6553 * expect us to change what va points to.
6554 6554 */
6555 6555 vattr = *va;
6556 6556
6557 6557 /*
6558 6558 * If the pathname is "", then dvp is the root vnode of
6559 6559 * a remote file mounted over a local directory.
6560 6560 * All that needs to be done is access
6561 6561 * checking and truncation. Note that we avoid doing
6562 6562 * open w/ create because the parent directory might
6563 6563 * be in pseudo-fs and the open would fail.
6564 6564 */
6565 6565 if (*nm == '\0') {
6566 6566 error = 0;
6567 6567 VN_HOLD(dvp);
6568 6568 vp = dvp;
6569 6569 must_trunc = TRUE;
6570 6570 } else {
6571 6571 /*
6572 6572 * We need to go over the wire, just to be sure whether the
6573 6573 * file exists or not. Using the DNLC can be dangerous in
6574 6574 * this case when making a decision regarding existence.
6575 6575 */
6576 6576 error = nfs4lookup(dvp, nm, &vp, cr, 1);
6577 6577 }
6578 6578
6579 6579 if (exclusive)
6580 6580 createmode = EXCLUSIVE4;
6581 6581 else
6582 6582 createmode = GUARDED4;
6583 6583
6584 6584 /*
6585 6585 * error would be set if the file does not exist on the
6586 6586 * server, so lets go create it.
6587 6587 */
6588 6588 if (error) {
6589 6589 goto create_otw;
6590 6590 }
6591 6591
6592 6592 /*
6593 6593 * File does exist on the server
6594 6594 */
6595 6595 if (exclusive == EXCL)
6596 6596 error = EEXIST;
6597 6597 else if (vp->v_type == VDIR && (mode & VWRITE))
6598 6598 error = EISDIR;
6599 6599 else {
6600 6600 /*
6601 6601 * If vnode is a device, create special vnode.
6602 6602 */
6603 6603 if (ISVDEV(vp->v_type)) {
6604 6604 tempvp = vp;
6605 6605 vp = specvp(vp, vp->v_rdev, vp->v_type, cr);
6606 6606 VN_RELE(tempvp);
6607 6607 }
6608 6608 if (!(error = VOP_ACCESS(vp, mode, 0, cr, ct))) {
6609 6609 if ((vattr.va_mask & AT_SIZE) &&
6610 6610 vp->v_type == VREG) {
6611 6611 rp = VTOR4(vp);
6612 6612 /*
6613 6613 * Check here for large file handled
6614 6614 * by LF-unaware process (as
6615 6615 * ufs_create() does)
6616 6616 */
6617 6617 if (!(flags & FOFFMAX)) {
6618 6618 mutex_enter(&rp->r_statelock);
6619 6619 if (rp->r_size > MAXOFF32_T)
6620 6620 error = EOVERFLOW;
6621 6621 mutex_exit(&rp->r_statelock);
6622 6622 }
6623 6623
6624 6624 /* if error is set then we need to return */
6625 6625 if (error) {
6626 6626 nfs_rw_exit(&drp->r_rwlock);
6627 6627 VN_RELE(vp);
6628 6628 return (error);
6629 6629 }
6630 6630
6631 6631 if (must_trunc) {
6632 6632 vattr.va_mask = AT_SIZE;
6633 6633 error = nfs4setattr(vp, &vattr, 0, cr,
6634 6634 NULL);
6635 6635 } else {
6636 6636 /*
6637 6637 * we know we have a regular file that already
6638 6638 * exists and we may end up truncating the file
6639 6639 * as a result of the open_otw, so flush out
6640 6640 * any dirty pages for this file first.
6641 6641 */
6642 6642 if (nfs4_has_pages(vp) &&
6643 6643 ((rp->r_flags & R4DIRTY) ||
6644 6644 rp->r_count > 0 ||
6645 6645 rp->r_mapcnt > 0)) {
6646 6646 error = nfs4_putpage(vp,
6647 6647 (offset_t)0, 0, 0, cr, ct);
6648 6648 if (error && (error == ENOSPC ||
6649 6649 error == EDQUOT)) {
6650 6650 mutex_enter(
6651 6651 &rp->r_statelock);
6652 6652 if (!rp->r_error)
6653 6653 rp->r_error =
6654 6654 error;
6655 6655 mutex_exit(
6656 6656 &rp->r_statelock);
6657 6657 }
6658 6658 }
6659 6659 vattr.va_mask = (AT_SIZE |
6660 6660 AT_TYPE | AT_MODE);
6661 6661 vattr.va_type = VREG;
6662 6662 createmode = UNCHECKED4;
6663 6663 truncating = 1;
6664 6664 goto create_otw;
6665 6665 }
6666 6666 }
6667 6667 }
6668 6668 }
6669 6669 nfs_rw_exit(&drp->r_rwlock);
6670 6670 if (error) {
6671 6671 VN_RELE(vp);
6672 6672 } else {
6673 6673 vnode_t *tvp;
6674 6674 rnode4_t *trp;
6675 6675 tvp = vp;
6676 6676 if (vp->v_type == VREG) {
6677 6677 trp = VTOR4(vp);
6678 6678 if (IS_SHADOW(vp, trp))
6679 6679 tvp = RTOV4(trp);
6680 6680 }
6681 6681
6682 6682 if (must_trunc) {
6683 6683 /*
6684 6684 * existing file got truncated, notify.
6685 6685 */
6686 6686 vnevent_create(tvp, ct);
6687 6687 }
6688 6688
6689 6689 *vpp = vp;
6690 6690 }
6691 6691 return (error);
6692 6692
6693 6693 create_otw:
6694 6694 dnlc_remove(dvp, nm);
6695 6695
6696 6696 ASSERT(vattr.va_mask & AT_TYPE);
6697 6697
6698 6698 /*
6699 6699 * If not a regular file let nfs4mknod() handle it.
6700 6700 */
6701 6701 if (vattr.va_type != VREG) {
6702 6702 error = nfs4mknod(dvp, nm, &vattr, exclusive, mode, vpp, cr);
6703 6703 nfs_rw_exit(&drp->r_rwlock);
6704 6704 return (error);
6705 6705 }
6706 6706
6707 6707 /*
6708 6708 * It _is_ a regular file.
6709 6709 */
6710 6710 ASSERT(vattr.va_mask & AT_MODE);
6711 6711 if (MANDMODE(vattr.va_mode)) {
6712 6712 nfs_rw_exit(&drp->r_rwlock);
6713 6713 return (EACCES);
6714 6714 }
6715 6715
6716 6716 /*
6717 6717 * If this happens to be a mknod of a regular file, then flags will
6718 6718 * have neither FREAD or FWRITE. However, we must set at least one
6719 6719 * for the call to nfs4open_otw. If it's open(O_CREAT) driving
6720 6720 * nfs4_create, then either FREAD, FWRITE, or FRDWR has already been
6721 6721 * set (based on openmode specified by app).
6722 6722 */
6723 6723 if ((flags & (FREAD|FWRITE)) == 0)
6724 6724 flags |= (FREAD|FWRITE);
6725 6725
6726 6726 error = nfs4open_otw(dvp, nm, &vattr, vpp, cr, 1, flags, createmode, 0);
6727 6727
6728 6728 if (vp != NULL) {
6729 6729 /* if create was successful, throw away the file's pages */
6730 6730 if (!error && (vattr.va_mask & AT_SIZE))
6731 6731 nfs4_invalidate_pages(vp, (vattr.va_size & PAGEMASK),
6732 6732 cr);
6733 6733 /* release the lookup hold */
6734 6734 VN_RELE(vp);
6735 6735 vp = NULL;
6736 6736 }
6737 6737
6738 6738 /*
6739 6739 * validate that we opened a regular file. This handles a misbehaving
6740 6740 * server that returns an incorrect FH.
6741 6741 */
6742 6742 if ((error == 0) && *vpp && (*vpp)->v_type != VREG) {
6743 6743 error = EISDIR;
6744 6744 VN_RELE(*vpp);
6745 6745 }
6746 6746
6747 6747 /*
6748 6748 * If this is not an exclusive create, then the CREATE
6749 6749 * request will be made with the GUARDED mode set. This
6750 6750 * means that the server will return EEXIST if the file
6751 6751 * exists. The file could exist because of a retransmitted
6752 6752 * request. In this case, we recover by starting over and
6753 6753 * checking to see whether the file exists. This second
6754 6754 * time through it should and a CREATE request will not be
6755 6755 * sent.
6756 6756 *
6757 6757 * This handles the problem of a dangling CREATE request
6758 6758 * which contains attributes which indicate that the file
6759 6759 * should be truncated. This retransmitted request could
6760 6760 * possibly truncate valid data in the file if not caught
6761 6761 * by the duplicate request mechanism on the server or if
6762 6762 * not caught by other means. The scenario is:
6763 6763 *
6764 6764 * Client transmits CREATE request with size = 0
6765 6765 * Client times out, retransmits request.
6766 6766 * Response to the first request arrives from the server
6767 6767 * and the client proceeds on.
6768 6768 * Client writes data to the file.
6769 6769 * The server now processes retransmitted CREATE request
6770 6770 * and truncates file.
6771 6771 *
6772 6772 * The use of the GUARDED CREATE request prevents this from
6773 6773 * happening because the retransmitted CREATE would fail
6774 6774 * with EEXIST and would not truncate the file.
6775 6775 */
6776 6776 if (error == EEXIST && exclusive == NONEXCL) {
6777 6777 #ifdef DEBUG
6778 6778 nfs4_create_misses++;
6779 6779 #endif
6780 6780 goto top;
6781 6781 }
6782 6782 nfs_rw_exit(&drp->r_rwlock);
6783 6783 if (truncating && !error && *vpp) {
6784 6784 vnode_t *tvp;
6785 6785 rnode4_t *trp;
6786 6786 /*
6787 6787 * existing file got truncated, notify.
6788 6788 */
6789 6789 tvp = *vpp;
6790 6790 trp = VTOR4(tvp);
6791 6791 if (IS_SHADOW(tvp, trp))
6792 6792 tvp = RTOV4(trp);
6793 6793 vnevent_create(tvp, ct);
6794 6794 }
6795 6795 return (error);
6796 6796 }
6797 6797
6798 6798 /*
6799 6799 * Create compound (for mkdir, mknod, symlink):
6800 6800 * { Putfh <dfh>; Create; Getfh; Getattr }
6801 6801 * It's okay if setattr failed to set gid - this is not considered
6802 6802 * an error, but purge attrs in that case.
6803 6803 */
6804 6804 static int
6805 6805 call_nfs4_create_req(vnode_t *dvp, char *nm, void *data, struct vattr *va,
6806 6806 vnode_t **vpp, cred_t *cr, nfs_ftype4 type)
6807 6807 {
6808 6808 int need_end_op = FALSE;
6809 6809 COMPOUND4args_clnt args;
6810 6810 COMPOUND4res_clnt res, *resp = NULL;
6811 6811 nfs_argop4 *argop;
6812 6812 nfs_resop4 *resop;
6813 6813 int doqueue;
6814 6814 mntinfo4_t *mi;
6815 6815 rnode4_t *drp = VTOR4(dvp);
6816 6816 change_info4 *cinfo;
6817 6817 GETFH4res *gf_res;
6818 6818 struct vattr vattr;
6819 6819 vnode_t *vp;
6820 6820 fattr4 *crattr;
6821 6821 bool_t needrecov = FALSE;
6822 6822 nfs4_recov_state_t recov_state;
6823 6823 nfs4_sharedfh_t *sfhp = NULL;
6824 6824 hrtime_t t;
6825 6825 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
6826 6826 int numops, argoplist_size, setgid_flag, idx_create, idx_fattr;
6827 6827 dirattr_info_t dinfo, *dinfop;
6828 6828 servinfo4_t *svp;
6829 6829 bitmap4 supp_attrs;
6830 6830
6831 6831 ASSERT(type == NF4DIR || type == NF4LNK || type == NF4BLK ||
6832 6832 type == NF4CHR || type == NF4SOCK || type == NF4FIFO);
6833 6833
6834 6834 mi = VTOMI4(dvp);
6835 6835
6836 6836 /*
6837 6837 * Make sure we properly deal with setting the right gid
6838 6838 * on a new directory to reflect the parent's setgid bit
6839 6839 */
6840 6840 setgid_flag = 0;
6841 6841 if (type == NF4DIR) {
6842 6842 struct vattr dva;
6843 6843
6844 6844 va->va_mode &= ~VSGID;
6845 6845 dva.va_mask = AT_MODE | AT_GID;
6846 6846 if (VOP_GETATTR(dvp, &dva, 0, cr, NULL) == 0) {
6847 6847
6848 6848 /*
6849 6849 * If the parent's directory has the setgid bit set
6850 6850 * _and_ the client was able to get a valid mapping
6851 6851 * for the parent dir's owner_group, we want to
6852 6852 * append NVERIFY(owner_group == dva.va_gid) and
6853 6853 * SETTATTR to the CREATE compound.
6854 6854 */
6855 6855 if (mi->mi_flags & MI4_GRPID || dva.va_mode & VSGID) {
6856 6856 setgid_flag = 1;
6857 6857 va->va_mode |= VSGID;
6858 6858 if (dva.va_gid != GID_NOBODY) {
6859 6859 va->va_mask |= AT_GID;
6860 6860 va->va_gid = dva.va_gid;
6861 6861 }
6862 6862 }
6863 6863 }
6864 6864 }
6865 6865
6866 6866 /*
6867 6867 * Create ops:
6868 6868 * 0:putfh(dir) 1:savefh(dir) 2:create 3:getfh(new) 4:getattr(new)
6869 6869 * 5:restorefh(dir) 6:getattr(dir)
6870 6870 *
6871 6871 * if (setgid)
6872 6872 * 0:putfh(dir) 1:create 2:getfh(new) 3:getattr(new)
6873 6873 * 4:savefh(new) 5:putfh(dir) 6:getattr(dir) 7:restorefh(new)
6874 6874 * 8:nverify 9:setattr
6875 6875 */
6876 6876 if (setgid_flag) {
6877 6877 numops = 10;
6878 6878 idx_create = 1;
6879 6879 idx_fattr = 3;
6880 6880 } else {
6881 6881 numops = 7;
6882 6882 idx_create = 2;
6883 6883 idx_fattr = 4;
6884 6884 }
6885 6885
6886 6886 ASSERT(nfs_zone() == mi->mi_zone);
6887 6887 if (nfs_rw_enter_sig(&drp->r_rwlock, RW_WRITER, INTR4(dvp))) {
6888 6888 return (EINTR);
6889 6889 }
6890 6890 recov_state.rs_flags = 0;
6891 6891 recov_state.rs_num_retry_despite_err = 0;
6892 6892
6893 6893 argoplist_size = numops * sizeof (nfs_argop4);
6894 6894 argop = kmem_alloc(argoplist_size, KM_SLEEP);
6895 6895
6896 6896 recov_retry:
6897 6897 if (type == NF4LNK)
6898 6898 args.ctag = TAG_SYMLINK;
6899 6899 else if (type == NF4DIR)
6900 6900 args.ctag = TAG_MKDIR;
6901 6901 else
6902 6902 args.ctag = TAG_MKNOD;
6903 6903
6904 6904 args.array_len = numops;
6905 6905 args.array = argop;
6906 6906
6907 6907 if (e.error = nfs4_start_op(mi, dvp, NULL, &recov_state)) {
6908 6908 nfs_rw_exit(&drp->r_rwlock);
6909 6909 kmem_free(argop, argoplist_size);
6910 6910 return (e.error);
6911 6911 }
6912 6912 need_end_op = TRUE;
6913 6913
6914 6914
6915 6915 /* 0: putfh directory */
6916 6916 argop[0].argop = OP_CPUTFH;
6917 6917 argop[0].nfs_argop4_u.opcputfh.sfh = drp->r_fh;
6918 6918
6919 6919 /* 1/2: Create object */
6920 6920 argop[idx_create].argop = OP_CCREATE;
6921 6921 argop[idx_create].nfs_argop4_u.opccreate.cname = nm;
6922 6922 argop[idx_create].nfs_argop4_u.opccreate.type = type;
6923 6923 if (type == NF4LNK) {
6924 6924 /*
6925 6925 * symlink, treat name as data
6926 6926 */
6927 6927 ASSERT(data != NULL);
6928 6928 argop[idx_create].nfs_argop4_u.opccreate.ftype4_u.clinkdata =
6929 6929 (char *)data;
6930 6930 }
6931 6931 if (type == NF4BLK || type == NF4CHR) {
6932 6932 ASSERT(data != NULL);
6933 6933 argop[idx_create].nfs_argop4_u.opccreate.ftype4_u.devdata =
6934 6934 *((specdata4 *)data);
6935 6935 }
6936 6936
6937 6937 crattr = &argop[idx_create].nfs_argop4_u.opccreate.createattrs;
6938 6938
6939 6939 svp = drp->r_server;
6940 6940 (void) nfs_rw_enter_sig(&svp->sv_lock, RW_READER, 0);
6941 6941 supp_attrs = svp->sv_supp_attrs;
6942 6942 nfs_rw_exit(&svp->sv_lock);
6943 6943
6944 6944 if (vattr_to_fattr4(va, NULL, crattr, 0, OP_CREATE, supp_attrs)) {
6945 6945 nfs_rw_exit(&drp->r_rwlock);
6946 6946 nfs4_end_op(mi, dvp, NULL, &recov_state, needrecov);
6947 6947 e.error = EINVAL;
6948 6948 kmem_free(argop, argoplist_size);
6949 6949 return (e.error);
6950 6950 }
6951 6951
6952 6952 /* 2/3: getfh fh of created object */
6953 6953 ASSERT(idx_create + 1 == idx_fattr - 1);
6954 6954 argop[idx_create + 1].argop = OP_GETFH;
6955 6955
6956 6956 /* 3/4: getattr of new object */
6957 6957 argop[idx_fattr].argop = OP_GETATTR;
6958 6958 argop[idx_fattr].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
6959 6959 argop[idx_fattr].nfs_argop4_u.opgetattr.mi = mi;
6960 6960
6961 6961 if (setgid_flag) {
6962 6962 vattr_t _v;
6963 6963
6964 6964 argop[4].argop = OP_SAVEFH;
6965 6965
6966 6966 argop[5].argop = OP_CPUTFH;
6967 6967 argop[5].nfs_argop4_u.opcputfh.sfh = drp->r_fh;
6968 6968
6969 6969 argop[6].argop = OP_GETATTR;
6970 6970 argop[6].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
6971 6971 argop[6].nfs_argop4_u.opgetattr.mi = mi;
6972 6972
6973 6973 argop[7].argop = OP_RESTOREFH;
6974 6974
6975 6975 /*
6976 6976 * nverify
6977 6977 *
6978 6978 * XXX - Revisit the last argument to nfs4_end_op()
6979 6979 * once 5020486 is fixed.
6980 6980 */
6981 6981 _v.va_mask = AT_GID;
6982 6982 _v.va_gid = va->va_gid;
6983 6983 if (e.error = nfs4args_verify(&argop[8], &_v, OP_NVERIFY,
6984 6984 supp_attrs)) {
6985 6985 nfs4_end_op(mi, dvp, *vpp, &recov_state, TRUE);
6986 6986 nfs_rw_exit(&drp->r_rwlock);
6987 6987 nfs4_fattr4_free(crattr);
6988 6988 kmem_free(argop, argoplist_size);
6989 6989 return (e.error);
6990 6990 }
6991 6991
6992 6992 /*
6993 6993 * setattr
6994 6994 *
6995 6995 * We _know_ we're not messing with AT_SIZE or AT_XTIME,
6996 6996 * so no need for stateid or flags. Also we specify NULL
6997 6997 * rp since we're only interested in setting owner_group
6998 6998 * attributes.
6999 6999 */
7000 7000 nfs4args_setattr(&argop[9], &_v, NULL, 0, NULL, cr, supp_attrs,
7001 7001 &e.error, 0);
7002 7002
7003 7003 if (e.error) {
7004 7004 nfs4_end_op(mi, dvp, *vpp, &recov_state, TRUE);
7005 7005 nfs_rw_exit(&drp->r_rwlock);
7006 7006 nfs4_fattr4_free(crattr);
7007 7007 nfs4args_verify_free(&argop[8]);
7008 7008 kmem_free(argop, argoplist_size);
7009 7009 return (e.error);
7010 7010 }
7011 7011 } else {
7012 7012 argop[1].argop = OP_SAVEFH;
7013 7013
7014 7014 argop[5].argop = OP_RESTOREFH;
7015 7015
7016 7016 argop[6].argop = OP_GETATTR;
7017 7017 argop[6].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
7018 7018 argop[6].nfs_argop4_u.opgetattr.mi = mi;
7019 7019 }
7020 7020
7021 7021 dnlc_remove(dvp, nm);
7022 7022
7023 7023 doqueue = 1;
7024 7024 t = gethrtime();
7025 7025 rfs4call(mi, &args, &res, cr, &doqueue, 0, &e);
7026 7026
7027 7027 needrecov = nfs4_needs_recovery(&e, FALSE, mi->mi_vfsp);
7028 7028 if (e.error) {
7029 7029 PURGE_ATTRCACHE4(dvp);
7030 7030 if (!needrecov)
7031 7031 goto out;
7032 7032 }
7033 7033
7034 7034 if (needrecov) {
7035 7035 if (nfs4_start_recovery(&e, mi, dvp, NULL, NULL, NULL,
7036 7036 OP_CREATE, NULL, NULL, NULL) == FALSE) {
7037 7037 nfs4_end_op(mi, dvp, NULL, &recov_state,
7038 7038 needrecov);
7039 7039 need_end_op = FALSE;
7040 7040 nfs4_fattr4_free(crattr);
7041 7041 if (setgid_flag) {
7042 7042 nfs4args_verify_free(&argop[8]);
7043 7043 nfs4args_setattr_free(&argop[9]);
7044 7044 }
7045 7045 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
7046 7046 goto recov_retry;
7047 7047 }
7048 7048 }
7049 7049
7050 7050 resp = &res;
7051 7051
7052 7052 if (res.status != NFS4_OK && res.array_len <= idx_fattr + 1) {
7053 7053
7054 7054 if (res.status == NFS4ERR_BADOWNER)
7055 7055 nfs4_log_badowner(mi, OP_CREATE);
7056 7056
7057 7057 e.error = geterrno4(res.status);
7058 7058
7059 7059 /*
7060 7060 * This check is left over from when create was implemented
7061 7061 * using a setattr op (instead of createattrs). If the
7062 7062 * putfh/create/getfh failed, the error was returned. If
7063 7063 * setattr/getattr failed, we keep going.
7064 7064 *
7065 7065 * It might be better to get rid of the GETFH also, and just
7066 7066 * do PUTFH/CREATE/GETATTR since the FH attr is mandatory.
7067 7067 * Then if any of the operations failed, we could return the
7068 7068 * error now, and remove much of the error code below.
7069 7069 */
7070 7070 if (res.array_len <= idx_fattr) {
7071 7071 /*
7072 7072 * Either Putfh, Create or Getfh failed.
7073 7073 */
7074 7074 PURGE_ATTRCACHE4(dvp);
7075 7075 /*
7076 7076 * nfs4_purge_stale_fh() may generate otw calls through
7077 7077 * nfs4_invalidate_pages. Hence the need to call
7078 7078 * nfs4_end_op() here to avoid nfs4_start_op() deadlock.
7079 7079 */
7080 7080 nfs4_end_op(mi, dvp, NULL, &recov_state,
7081 7081 needrecov);
7082 7082 need_end_op = FALSE;
7083 7083 nfs4_purge_stale_fh(e.error, dvp, cr);
7084 7084 goto out;
7085 7085 }
7086 7086 }
7087 7087
7088 7088 resop = &res.array[idx_create]; /* create res */
7089 7089 cinfo = &resop->nfs_resop4_u.opcreate.cinfo;
7090 7090
7091 7091 resop = &res.array[idx_create + 1]; /* getfh res */
7092 7092 gf_res = &resop->nfs_resop4_u.opgetfh;
7093 7093
7094 7094 sfhp = sfh4_get(&gf_res->object, mi);
7095 7095 if (e.error) {
7096 7096 *vpp = vp = makenfs4node(sfhp, NULL, dvp->v_vfsp, t, cr, dvp,
7097 7097 fn_get(VTOSV(dvp)->sv_name, nm, sfhp));
7098 7098 if (vp->v_type == VNON) {
7099 7099 vattr.va_mask = AT_TYPE;
7100 7100 /*
7101 7101 * Need to call nfs4_end_op before nfs4getattr to avoid
7102 7102 * potential nfs4_start_op deadlock. See RFE 4777612.
7103 7103 */
7104 7104 nfs4_end_op(mi, dvp, NULL, &recov_state,
7105 7105 needrecov);
7106 7106 need_end_op = FALSE;
7107 7107 e.error = nfs4getattr(vp, &vattr, cr);
7108 7108 if (e.error) {
7109 7109 VN_RELE(vp);
7110 7110 *vpp = NULL;
7111 7111 goto out;
7112 7112 }
7113 7113 vp->v_type = vattr.va_type;
7114 7114 }
7115 7115 e.error = 0;
7116 7116 } else {
7117 7117 *vpp = vp = makenfs4node(sfhp,
7118 7118 &res.array[idx_fattr].nfs_resop4_u.opgetattr.ga_res,
7119 7119 dvp->v_vfsp, t, cr,
7120 7120 dvp, fn_get(VTOSV(dvp)->sv_name, nm, sfhp));
7121 7121 }
7122 7122
7123 7123 /*
7124 7124 * If compound succeeded, then update dir attrs
7125 7125 */
7126 7126 if (res.status == NFS4_OK) {
7127 7127 dinfo.di_garp = &res.array[6].nfs_resop4_u.opgetattr.ga_res;
7128 7128 dinfo.di_cred = cr;
7129 7129 dinfo.di_time_call = t;
7130 7130 dinfop = &dinfo;
7131 7131 } else
7132 7132 dinfop = NULL;
7133 7133
7134 7134 /* Update directory cache attribute, readdir and dnlc caches */
7135 7135 nfs4_update_dircaches(cinfo, dvp, vp, nm, dinfop);
7136 7136
7137 7137 out:
7138 7138 if (sfhp != NULL)
7139 7139 sfh4_rele(&sfhp);
7140 7140 nfs_rw_exit(&drp->r_rwlock);
7141 7141 nfs4_fattr4_free(crattr);
7142 7142 if (setgid_flag) {
7143 7143 nfs4args_verify_free(&argop[8]);
7144 7144 nfs4args_setattr_free(&argop[9]);
7145 7145 }
7146 7146 if (resp)
7147 7147 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
7148 7148 if (need_end_op)
7149 7149 nfs4_end_op(mi, dvp, NULL, &recov_state, needrecov);
7150 7150
7151 7151 kmem_free(argop, argoplist_size);
7152 7152 return (e.error);
7153 7153 }
7154 7154
7155 7155 /* ARGSUSED */
7156 7156 static int
7157 7157 nfs4mknod(vnode_t *dvp, char *nm, struct vattr *va, enum vcexcl exclusive,
7158 7158 int mode, vnode_t **vpp, cred_t *cr)
7159 7159 {
7160 7160 int error;
7161 7161 vnode_t *vp;
7162 7162 nfs_ftype4 type;
7163 7163 specdata4 spec, *specp = NULL;
7164 7164
7165 7165 ASSERT(nfs_zone() == VTOMI4(dvp)->mi_zone);
7166 7166
7167 7167 switch (va->va_type) {
7168 7168 case VCHR:
7169 7169 case VBLK:
7170 7170 type = (va->va_type == VCHR) ? NF4CHR : NF4BLK;
7171 7171 spec.specdata1 = getmajor(va->va_rdev);
7172 7172 spec.specdata2 = getminor(va->va_rdev);
7173 7173 specp = &spec;
7174 7174 break;
7175 7175
7176 7176 case VFIFO:
7177 7177 type = NF4FIFO;
7178 7178 break;
7179 7179 case VSOCK:
7180 7180 type = NF4SOCK;
7181 7181 break;
7182 7182
7183 7183 default:
7184 7184 return (EINVAL);
7185 7185 }
7186 7186
7187 7187 error = call_nfs4_create_req(dvp, nm, specp, va, &vp, cr, type);
7188 7188 if (error) {
7189 7189 return (error);
7190 7190 }
7191 7191
7192 7192 /*
7193 7193 * This might not be needed any more; special case to deal
7194 7194 * with problematic v2/v3 servers. Since create was unable
7195 7195 * to set group correctly, not sure what hope setattr has.
7196 7196 */
7197 7197 if (va->va_gid != VTOR4(vp)->r_attr.va_gid) {
7198 7198 va->va_mask = AT_GID;
7199 7199 (void) nfs4setattr(vp, va, 0, cr, NULL);
7200 7200 }
7201 7201
7202 7202 /*
7203 7203 * If vnode is a device create special vnode
7204 7204 */
7205 7205 if (ISVDEV(vp->v_type)) {
7206 7206 *vpp = specvp(vp, vp->v_rdev, vp->v_type, cr);
7207 7207 VN_RELE(vp);
7208 7208 } else {
7209 7209 *vpp = vp;
7210 7210 }
7211 7211 return (error);
7212 7212 }
7213 7213
7214 7214 /*
7215 7215 * Remove requires that the current fh be the target directory.
7216 7216 * After the operation, the current fh is unchanged.
7217 7217 * The compound op structure is:
7218 7218 * PUTFH(targetdir), REMOVE
7219 7219 *
7220 7220 * Weirdness: if the vnode to be removed is open
7221 7221 * we rename it instead of removing it and nfs_inactive
7222 7222 * will remove the new name.
7223 7223 */
7224 7224 /* ARGSUSED */
7225 7225 static int
7226 7226 nfs4_remove(vnode_t *dvp, char *nm, cred_t *cr, caller_context_t *ct, int flags)
7227 7227 {
7228 7228 COMPOUND4args_clnt args;
7229 7229 COMPOUND4res_clnt res, *resp = NULL;
7230 7230 REMOVE4res *rm_res;
7231 7231 nfs_argop4 argop[3];
7232 7232 nfs_resop4 *resop;
7233 7233 vnode_t *vp;
7234 7234 char *tmpname;
7235 7235 int doqueue;
7236 7236 mntinfo4_t *mi;
7237 7237 rnode4_t *rp;
7238 7238 rnode4_t *drp;
7239 7239 int needrecov = 0;
7240 7240 nfs4_recov_state_t recov_state;
7241 7241 int isopen;
7242 7242 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
7243 7243 dirattr_info_t dinfo;
7244 7244
7245 7245 if (nfs_zone() != VTOMI4(dvp)->mi_zone)
7246 7246 return (EPERM);
7247 7247 drp = VTOR4(dvp);
7248 7248 if (nfs_rw_enter_sig(&drp->r_rwlock, RW_WRITER, INTR4(dvp)))
7249 7249 return (EINTR);
7250 7250
7251 7251 e.error = nfs4lookup(dvp, nm, &vp, cr, 0);
7252 7252 if (e.error) {
7253 7253 nfs_rw_exit(&drp->r_rwlock);
7254 7254 return (e.error);
7255 7255 }
7256 7256
7257 7257 if (vp->v_type == VDIR) {
7258 7258 VN_RELE(vp);
7259 7259 nfs_rw_exit(&drp->r_rwlock);
7260 7260 return (EISDIR);
7261 7261 }
7262 7262
7263 7263 /*
7264 7264 * First just remove the entry from the name cache, as it
7265 7265 * is most likely the only entry for this vp.
7266 7266 */
7267 7267 dnlc_remove(dvp, nm);
7268 7268
7269 7269 rp = VTOR4(vp);
7270 7270
7271 7271 /*
7272 7272 * For regular file types, check to see if the file is open by looking
7273 7273 * at the open streams.
7274 7274 * For all other types, check the reference count on the vnode. Since
7275 7275 * they are not opened OTW they never have an open stream.
7276 7276 *
7277 7277 * If the file is open, rename it to .nfsXXXX.
7278 7278 */
7279 7279 if (vp->v_type != VREG) {
7280 7280 /*
7281 7281 * If the file has a v_count > 1 then there may be more than one
7282 7282 * entry in the name cache due multiple links or an open file,
7283 7283 * but we don't have the real reference count so flush all
7284 7284 * possible entries.
7285 7285 */
7286 7286 if (vp->v_count > 1)
7287 7287 dnlc_purge_vp(vp);
7288 7288
7289 7289 /*
7290 7290 * Now we have the real reference count.
7291 7291 */
7292 7292 isopen = vp->v_count > 1;
7293 7293 } else {
7294 7294 mutex_enter(&rp->r_os_lock);
7295 7295 isopen = list_head(&rp->r_open_streams) != NULL;
7296 7296 mutex_exit(&rp->r_os_lock);
7297 7297 }
7298 7298
7299 7299 mutex_enter(&rp->r_statelock);
7300 7300 if (isopen &&
7301 7301 (rp->r_unldvp == NULL || strcmp(nm, rp->r_unlname) == 0)) {
7302 7302 mutex_exit(&rp->r_statelock);
7303 7303 tmpname = newname();
7304 7304 e.error = nfs4rename(dvp, nm, dvp, tmpname, cr, ct);
7305 7305 if (e.error)
7306 7306 kmem_free(tmpname, MAXNAMELEN);
7307 7307 else {
7308 7308 mutex_enter(&rp->r_statelock);
7309 7309 if (rp->r_unldvp == NULL) {
7310 7310 VN_HOLD(dvp);
7311 7311 rp->r_unldvp = dvp;
7312 7312 if (rp->r_unlcred != NULL)
7313 7313 crfree(rp->r_unlcred);
7314 7314 crhold(cr);
7315 7315 rp->r_unlcred = cr;
7316 7316 rp->r_unlname = tmpname;
7317 7317 } else {
7318 7318 kmem_free(rp->r_unlname, MAXNAMELEN);
7319 7319 rp->r_unlname = tmpname;
7320 7320 }
7321 7321 mutex_exit(&rp->r_statelock);
7322 7322 }
7323 7323 VN_RELE(vp);
7324 7324 nfs_rw_exit(&drp->r_rwlock);
7325 7325 return (e.error);
7326 7326 }
7327 7327 /*
7328 7328 * Actually remove the file/dir
7329 7329 */
7330 7330 mutex_exit(&rp->r_statelock);
7331 7331
7332 7332 /*
7333 7333 * We need to flush any dirty pages which happen to
7334 7334 * be hanging around before removing the file.
7335 7335 * This shouldn't happen very often since in NFSv4
7336 7336 * we should be close to open consistent.
7337 7337 */
7338 7338 if (nfs4_has_pages(vp) &&
7339 7339 ((rp->r_flags & R4DIRTY) || rp->r_count > 0)) {
7340 7340 e.error = nfs4_putpage(vp, (u_offset_t)0, 0, 0, cr, ct);
7341 7341 if (e.error && (e.error == ENOSPC || e.error == EDQUOT)) {
7342 7342 mutex_enter(&rp->r_statelock);
7343 7343 if (!rp->r_error)
7344 7344 rp->r_error = e.error;
7345 7345 mutex_exit(&rp->r_statelock);
7346 7346 }
7347 7347 }
7348 7348
7349 7349 mi = VTOMI4(dvp);
7350 7350
7351 7351 (void) nfs4delegreturn(rp, NFS4_DR_REOPEN);
7352 7352 recov_state.rs_flags = 0;
7353 7353 recov_state.rs_num_retry_despite_err = 0;
7354 7354
7355 7355 recov_retry:
7356 7356 /*
7357 7357 * Remove ops: putfh dir; remove
7358 7358 */
7359 7359 args.ctag = TAG_REMOVE;
7360 7360 args.array_len = 3;
7361 7361 args.array = argop;
7362 7362
7363 7363 e.error = nfs4_start_op(VTOMI4(dvp), dvp, NULL, &recov_state);
7364 7364 if (e.error) {
7365 7365 nfs_rw_exit(&drp->r_rwlock);
7366 7366 VN_RELE(vp);
7367 7367 return (e.error);
7368 7368 }
7369 7369
7370 7370 /* putfh directory */
7371 7371 argop[0].argop = OP_CPUTFH;
7372 7372 argop[0].nfs_argop4_u.opcputfh.sfh = drp->r_fh;
7373 7373
7374 7374 /* remove */
7375 7375 argop[1].argop = OP_CREMOVE;
7376 7376 argop[1].nfs_argop4_u.opcremove.ctarget = nm;
7377 7377
7378 7378 /* getattr dir */
7379 7379 argop[2].argop = OP_GETATTR;
7380 7380 argop[2].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
7381 7381 argop[2].nfs_argop4_u.opgetattr.mi = mi;
7382 7382
7383 7383 doqueue = 1;
7384 7384 dinfo.di_time_call = gethrtime();
7385 7385 rfs4call(mi, &args, &res, cr, &doqueue, 0, &e);
7386 7386
7387 7387 PURGE_ATTRCACHE4(vp);
7388 7388
7389 7389 needrecov = nfs4_needs_recovery(&e, FALSE, mi->mi_vfsp);
7390 7390 if (e.error)
7391 7391 PURGE_ATTRCACHE4(dvp);
7392 7392
7393 7393 if (needrecov) {
7394 7394 if (nfs4_start_recovery(&e, VTOMI4(dvp), dvp,
7395 7395 NULL, NULL, NULL, OP_REMOVE, NULL, NULL, NULL) == FALSE) {
7396 7396 if (!e.error)
7397 7397 (void) xdr_free(xdr_COMPOUND4res_clnt,
7398 7398 (caddr_t)&res);
7399 7399 nfs4_end_op(VTOMI4(dvp), dvp, NULL, &recov_state,
7400 7400 needrecov);
7401 7401 goto recov_retry;
7402 7402 }
7403 7403 }
7404 7404
7405 7405 /*
7406 7406 * Matching nfs4_end_op() for start_op() above.
7407 7407 * There is a path in the code below which calls
7408 7408 * nfs4_purge_stale_fh(), which may generate otw calls through
7409 7409 * nfs4_invalidate_pages. Hence we need to call nfs4_end_op()
7410 7410 * here to avoid nfs4_start_op() deadlock.
7411 7411 */
7412 7412 nfs4_end_op(VTOMI4(dvp), dvp, NULL, &recov_state, needrecov);
7413 7413
7414 7414 if (!e.error) {
7415 7415 resp = &res;
7416 7416
7417 7417 if (res.status) {
7418 7418 e.error = geterrno4(res.status);
7419 7419 PURGE_ATTRCACHE4(dvp);
7420 7420 nfs4_purge_stale_fh(e.error, dvp, cr);
7421 7421 } else {
7422 7422 resop = &res.array[1]; /* remove res */
7423 7423 rm_res = &resop->nfs_resop4_u.opremove;
7424 7424
7425 7425 dinfo.di_garp =
7426 7426 &res.array[2].nfs_resop4_u.opgetattr.ga_res;
7427 7427 dinfo.di_cred = cr;
7428 7428
7429 7429 /* Update directory attr, readdir and dnlc caches */
7430 7430 nfs4_update_dircaches(&rm_res->cinfo, dvp, NULL, NULL,
7431 7431 &dinfo);
7432 7432 }
7433 7433 }
7434 7434 nfs_rw_exit(&drp->r_rwlock);
7435 7435 if (resp)
7436 7436 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
7437 7437
7438 7438 if (e.error == 0) {
7439 7439 vnode_t *tvp;
7440 7440 rnode4_t *trp;
7441 7441 trp = VTOR4(vp);
7442 7442 tvp = vp;
7443 7443 if (IS_SHADOW(vp, trp))
7444 7444 tvp = RTOV4(trp);
7445 7445 vnevent_remove(tvp, dvp, nm, ct);
7446 7446 }
7447 7447 VN_RELE(vp);
7448 7448 return (e.error);
7449 7449 }
7450 7450
7451 7451 /*
7452 7452 * Link requires that the current fh be the target directory and the
7453 7453 * saved fh be the source fh. After the operation, the current fh is unchanged.
7454 7454 * Thus the compound op structure is:
7455 7455 * PUTFH(file), SAVEFH, PUTFH(targetdir), LINK, RESTOREFH,
7456 7456 * GETATTR(file)
7457 7457 */
7458 7458 /* ARGSUSED */
7459 7459 static int
7460 7460 nfs4_link(vnode_t *tdvp, vnode_t *svp, char *tnm, cred_t *cr,
7461 7461 caller_context_t *ct, int flags)
7462 7462 {
7463 7463 COMPOUND4args_clnt args;
7464 7464 COMPOUND4res_clnt res, *resp = NULL;
7465 7465 LINK4res *ln_res;
7466 7466 int argoplist_size = 7 * sizeof (nfs_argop4);
7467 7467 nfs_argop4 *argop;
7468 7468 nfs_resop4 *resop;
7469 7469 vnode_t *realvp, *nvp;
7470 7470 int doqueue;
7471 7471 mntinfo4_t *mi;
7472 7472 rnode4_t *tdrp;
7473 7473 bool_t needrecov = FALSE;
7474 7474 nfs4_recov_state_t recov_state;
7475 7475 hrtime_t t;
7476 7476 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
7477 7477 dirattr_info_t dinfo;
7478 7478
7479 7479 ASSERT(*tnm != '\0');
7480 7480 ASSERT(tdvp->v_type == VDIR);
7481 7481 ASSERT(nfs4_consistent_type(tdvp));
7482 7482 ASSERT(nfs4_consistent_type(svp));
7483 7483
7484 7484 if (nfs_zone() != VTOMI4(tdvp)->mi_zone)
7485 7485 return (EPERM);
7486 7486 if (VOP_REALVP(svp, &realvp, ct) == 0) {
7487 7487 svp = realvp;
7488 7488 ASSERT(nfs4_consistent_type(svp));
7489 7489 }
7490 7490
7491 7491 tdrp = VTOR4(tdvp);
7492 7492 mi = VTOMI4(svp);
7493 7493
7494 7494 if (!(mi->mi_flags & MI4_LINK)) {
7495 7495 return (EOPNOTSUPP);
7496 7496 }
7497 7497 recov_state.rs_flags = 0;
7498 7498 recov_state.rs_num_retry_despite_err = 0;
7499 7499
7500 7500 if (nfs_rw_enter_sig(&tdrp->r_rwlock, RW_WRITER, INTR4(tdvp)))
7501 7501 return (EINTR);
7502 7502
7503 7503 recov_retry:
7504 7504 argop = kmem_alloc(argoplist_size, KM_SLEEP);
7505 7505
7506 7506 args.ctag = TAG_LINK;
7507 7507
7508 7508 /*
7509 7509 * Link ops: putfh fl; savefh; putfh tdir; link; getattr(dir);
7510 7510 * restorefh; getattr(fl)
7511 7511 */
7512 7512 args.array_len = 7;
7513 7513 args.array = argop;
7514 7514
7515 7515 e.error = nfs4_start_op(VTOMI4(svp), svp, tdvp, &recov_state);
7516 7516 if (e.error) {
7517 7517 kmem_free(argop, argoplist_size);
7518 7518 nfs_rw_exit(&tdrp->r_rwlock);
7519 7519 return (e.error);
7520 7520 }
7521 7521
7522 7522 /* 0. putfh file */
7523 7523 argop[0].argop = OP_CPUTFH;
7524 7524 argop[0].nfs_argop4_u.opcputfh.sfh = VTOR4(svp)->r_fh;
7525 7525
7526 7526 /* 1. save current fh to free up the space for the dir */
7527 7527 argop[1].argop = OP_SAVEFH;
7528 7528
7529 7529 /* 2. putfh targetdir */
7530 7530 argop[2].argop = OP_CPUTFH;
7531 7531 argop[2].nfs_argop4_u.opcputfh.sfh = tdrp->r_fh;
7532 7532
7533 7533 /* 3. link: current_fh is targetdir, saved_fh is source */
7534 7534 argop[3].argop = OP_CLINK;
7535 7535 argop[3].nfs_argop4_u.opclink.cnewname = tnm;
7536 7536
7537 7537 /* 4. Get attributes of dir */
7538 7538 argop[4].argop = OP_GETATTR;
7539 7539 argop[4].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
7540 7540 argop[4].nfs_argop4_u.opgetattr.mi = mi;
7541 7541
7542 7542 /* 5. If link was successful, restore current vp to file */
7543 7543 argop[5].argop = OP_RESTOREFH;
7544 7544
7545 7545 /* 6. Get attributes of linked object */
7546 7546 argop[6].argop = OP_GETATTR;
7547 7547 argop[6].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
7548 7548 argop[6].nfs_argop4_u.opgetattr.mi = mi;
7549 7549
7550 7550 dnlc_remove(tdvp, tnm);
7551 7551
7552 7552 doqueue = 1;
7553 7553 t = gethrtime();
7554 7554
7555 7555 rfs4call(VTOMI4(svp), &args, &res, cr, &doqueue, 0, &e);
7556 7556
7557 7557 needrecov = nfs4_needs_recovery(&e, FALSE, svp->v_vfsp);
7558 7558 if (e.error != 0 && !needrecov) {
7559 7559 PURGE_ATTRCACHE4(tdvp);
7560 7560 PURGE_ATTRCACHE4(svp);
7561 7561 nfs4_end_op(VTOMI4(svp), svp, tdvp, &recov_state, needrecov);
7562 7562 goto out;
7563 7563 }
7564 7564
7565 7565 if (needrecov) {
7566 7566 bool_t abort;
7567 7567
7568 7568 abort = nfs4_start_recovery(&e, VTOMI4(svp), svp, tdvp,
7569 7569 NULL, NULL, OP_LINK, NULL, NULL, NULL);
7570 7570 if (abort == FALSE) {
7571 7571 nfs4_end_op(VTOMI4(svp), svp, tdvp, &recov_state,
7572 7572 needrecov);
7573 7573 kmem_free(argop, argoplist_size);
7574 7574 if (!e.error)
7575 7575 (void) xdr_free(xdr_COMPOUND4res_clnt,
7576 7576 (caddr_t)&res);
7577 7577 goto recov_retry;
7578 7578 } else {
7579 7579 if (e.error != 0) {
7580 7580 PURGE_ATTRCACHE4(tdvp);
7581 7581 PURGE_ATTRCACHE4(svp);
7582 7582 nfs4_end_op(VTOMI4(svp), svp, tdvp,
7583 7583 &recov_state, needrecov);
7584 7584 goto out;
7585 7585 }
7586 7586 /* fall through for res.status case */
7587 7587 }
7588 7588 }
7589 7589
7590 7590 nfs4_end_op(VTOMI4(svp), svp, tdvp, &recov_state, needrecov);
7591 7591
7592 7592 resp = &res;
7593 7593 if (res.status) {
7594 7594 /* If link succeeded, then don't return error */
7595 7595 e.error = geterrno4(res.status);
7596 7596 if (res.array_len <= 4) {
7597 7597 /*
7598 7598 * Either Putfh, Savefh, Putfh dir, or Link failed
7599 7599 */
7600 7600 PURGE_ATTRCACHE4(svp);
7601 7601 PURGE_ATTRCACHE4(tdvp);
7602 7602 if (e.error == EOPNOTSUPP) {
7603 7603 mutex_enter(&mi->mi_lock);
7604 7604 mi->mi_flags &= ~MI4_LINK;
7605 7605 mutex_exit(&mi->mi_lock);
7606 7606 }
7607 7607 /* Remap EISDIR to EPERM for non-root user for SVVS */
7608 7608 /* XXX-LP */
7609 7609 if (e.error == EISDIR && crgetuid(cr) != 0)
7610 7610 e.error = EPERM;
7611 7611 goto out;
7612 7612 }
7613 7613 }
7614 7614
7615 7615 /* either no error or one of the postop getattr failed */
7616 7616
7617 7617 /*
7618 7618 * XXX - if LINK succeeded, but no attrs were returned for link
7619 7619 * file, purge its cache.
7620 7620 *
7621 7621 * XXX Perform a simplified version of wcc checking. Instead of
7622 7622 * have another getattr to get pre-op, just purge cache if
7623 7623 * any of the ops prior to and including the getattr failed.
7624 7624 * If the getattr succeeded then update the attrcache accordingly.
7625 7625 */
7626 7626
7627 7627 /*
7628 7628 * update cache with link file postattrs.
7629 7629 * Note: at this point resop points to link res.
7630 7630 */
7631 7631 resop = &res.array[3]; /* link res */
7632 7632 ln_res = &resop->nfs_resop4_u.oplink;
7633 7633 if (res.status == NFS4_OK)
7634 7634 e.error = nfs4_update_attrcache(res.status,
7635 7635 &res.array[6].nfs_resop4_u.opgetattr.ga_res,
7636 7636 t, svp, cr);
7637 7637
7638 7638 /*
7639 7639 * Call makenfs4node to create the new shadow vp for tnm.
7640 7640 * We pass NULL attrs because we just cached attrs for
7641 7641 * the src object. All we're trying to accomplish is to
7642 7642 * to create the new shadow vnode.
7643 7643 */
7644 7644 nvp = makenfs4node(VTOR4(svp)->r_fh, NULL, tdvp->v_vfsp, t, cr,
7645 7645 tdvp, fn_get(VTOSV(tdvp)->sv_name, tnm, VTOR4(svp)->r_fh));
7646 7646
7647 7647 /* Update target cache attribute, readdir and dnlc caches */
7648 7648 dinfo.di_garp = &res.array[4].nfs_resop4_u.opgetattr.ga_res;
7649 7649 dinfo.di_time_call = t;
7650 7650 dinfo.di_cred = cr;
7651 7651
7652 7652 nfs4_update_dircaches(&ln_res->cinfo, tdvp, nvp, tnm, &dinfo);
7653 7653 ASSERT(nfs4_consistent_type(tdvp));
7654 7654 ASSERT(nfs4_consistent_type(svp));
7655 7655 ASSERT(nfs4_consistent_type(nvp));
7656 7656 VN_RELE(nvp);
7657 7657
7658 7658 if (!e.error) {
7659 7659 vnode_t *tvp;
7660 7660 rnode4_t *trp;
7661 7661 /*
7662 7662 * Notify the source file of this link operation.
7663 7663 */
7664 7664 trp = VTOR4(svp);
7665 7665 tvp = svp;
7666 7666 if (IS_SHADOW(svp, trp))
7667 7667 tvp = RTOV4(trp);
7668 7668 vnevent_link(tvp, ct);
7669 7669 }
7670 7670 out:
7671 7671 kmem_free(argop, argoplist_size);
7672 7672 if (resp)
7673 7673 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
7674 7674
7675 7675 nfs_rw_exit(&tdrp->r_rwlock);
7676 7676
7677 7677 return (e.error);
7678 7678 }
7679 7679
7680 7680 /* ARGSUSED */
7681 7681 static int
7682 7682 nfs4_rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr,
7683 7683 caller_context_t *ct, int flags)
7684 7684 {
7685 7685 vnode_t *realvp;
7686 7686
7687 7687 if (nfs_zone() != VTOMI4(odvp)->mi_zone)
7688 7688 return (EPERM);
7689 7689 if (VOP_REALVP(ndvp, &realvp, ct) == 0)
7690 7690 ndvp = realvp;
7691 7691
7692 7692 return (nfs4rename(odvp, onm, ndvp, nnm, cr, ct));
7693 7693 }
7694 7694
7695 7695 /*
7696 7696 * nfs4rename does the real work of renaming in NFS Version 4.
7697 7697 *
7698 7698 * A file handle is considered volatile for renaming purposes if either
7699 7699 * of the volatile bits are turned on. However, the compound may differ
7700 7700 * based on the likelihood of the filehandle to change during rename.
7701 7701 */
7702 7702 static int
7703 7703 nfs4rename(vnode_t *odvp, char *onm, vnode_t *ndvp, char *nnm, cred_t *cr,
7704 7704 caller_context_t *ct)
7705 7705 {
7706 7706 int error;
7707 7707 mntinfo4_t *mi;
7708 7708 vnode_t *nvp = NULL;
7709 7709 vnode_t *ovp = NULL;
7710 7710 char *tmpname = NULL;
7711 7711 rnode4_t *rp;
7712 7712 rnode4_t *odrp;
7713 7713 rnode4_t *ndrp;
7714 7714 int did_link = 0;
7715 7715 int do_link = 1;
7716 7716 nfsstat4 stat = NFS4_OK;
7717 7717
7718 7718 ASSERT(nfs_zone() == VTOMI4(odvp)->mi_zone);
7719 7719 ASSERT(nfs4_consistent_type(odvp));
7720 7720 ASSERT(nfs4_consistent_type(ndvp));
7721 7721
7722 7722 if (onm[0] == '.' && (onm[1] == '\0' ||
7723 7723 (onm[1] == '.' && onm[2] == '\0')))
7724 7724 return (EINVAL);
7725 7725
7726 7726 if (nnm[0] == '.' && (nnm[1] == '\0' ||
7727 7727 (nnm[1] == '.' && nnm[2] == '\0')))
7728 7728 return (EINVAL);
7729 7729
7730 7730 odrp = VTOR4(odvp);
7731 7731 ndrp = VTOR4(ndvp);
7732 7732 if ((intptr_t)odrp < (intptr_t)ndrp) {
7733 7733 if (nfs_rw_enter_sig(&odrp->r_rwlock, RW_WRITER, INTR4(odvp)))
7734 7734 return (EINTR);
7735 7735 if (nfs_rw_enter_sig(&ndrp->r_rwlock, RW_WRITER, INTR4(ndvp))) {
7736 7736 nfs_rw_exit(&odrp->r_rwlock);
7737 7737 return (EINTR);
7738 7738 }
7739 7739 } else {
7740 7740 if (nfs_rw_enter_sig(&ndrp->r_rwlock, RW_WRITER, INTR4(ndvp)))
7741 7741 return (EINTR);
7742 7742 if (nfs_rw_enter_sig(&odrp->r_rwlock, RW_WRITER, INTR4(odvp))) {
7743 7743 nfs_rw_exit(&ndrp->r_rwlock);
7744 7744 return (EINTR);
7745 7745 }
7746 7746 }
7747 7747
7748 7748 /*
7749 7749 * Lookup the target file. If it exists, it needs to be
7750 7750 * checked to see whether it is a mount point and whether
7751 7751 * it is active (open).
7752 7752 */
7753 7753 error = nfs4lookup(ndvp, nnm, &nvp, cr, 0);
7754 7754 if (!error) {
7755 7755 int isactive;
7756 7756
7757 7757 ASSERT(nfs4_consistent_type(nvp));
7758 7758 /*
7759 7759 * If this file has been mounted on, then just
7760 7760 * return busy because renaming to it would remove
7761 7761 * the mounted file system from the name space.
7762 7762 */
7763 7763 if (vn_ismntpt(nvp)) {
7764 7764 VN_RELE(nvp);
7765 7765 nfs_rw_exit(&odrp->r_rwlock);
7766 7766 nfs_rw_exit(&ndrp->r_rwlock);
7767 7767 return (EBUSY);
7768 7768 }
7769 7769
7770 7770 /*
7771 7771 * First just remove the entry from the name cache, as it
7772 7772 * is most likely the only entry for this vp.
7773 7773 */
7774 7774 dnlc_remove(ndvp, nnm);
7775 7775
7776 7776 rp = VTOR4(nvp);
7777 7777
7778 7778 if (nvp->v_type != VREG) {
7779 7779 /*
7780 7780 * Purge the name cache of all references to this vnode
7781 7781 * so that we can check the reference count to infer
7782 7782 * whether it is active or not.
7783 7783 */
7784 7784 if (nvp->v_count > 1)
7785 7785 dnlc_purge_vp(nvp);
7786 7786
7787 7787 isactive = nvp->v_count > 1;
7788 7788 } else {
7789 7789 mutex_enter(&rp->r_os_lock);
7790 7790 isactive = list_head(&rp->r_open_streams) != NULL;
7791 7791 mutex_exit(&rp->r_os_lock);
7792 7792 }
7793 7793
7794 7794 /*
7795 7795 * If the vnode is active and is not a directory,
7796 7796 * arrange to rename it to a
7797 7797 * temporary file so that it will continue to be
7798 7798 * accessible. This implements the "unlink-open-file"
7799 7799 * semantics for the target of a rename operation.
7800 7800 * Before doing this though, make sure that the
7801 7801 * source and target files are not already the same.
7802 7802 */
7803 7803 if (isactive && nvp->v_type != VDIR) {
7804 7804 /*
7805 7805 * Lookup the source name.
7806 7806 */
7807 7807 error = nfs4lookup(odvp, onm, &ovp, cr, 0);
7808 7808
7809 7809 /*
7810 7810 * The source name *should* already exist.
7811 7811 */
7812 7812 if (error) {
7813 7813 VN_RELE(nvp);
7814 7814 nfs_rw_exit(&odrp->r_rwlock);
7815 7815 nfs_rw_exit(&ndrp->r_rwlock);
7816 7816 return (error);
7817 7817 }
7818 7818
7819 7819 ASSERT(nfs4_consistent_type(ovp));
7820 7820
7821 7821 /*
7822 7822 * Compare the two vnodes. If they are the same,
7823 7823 * just release all held vnodes and return success.
7824 7824 */
7825 7825 if (VN_CMP(ovp, nvp)) {
7826 7826 VN_RELE(ovp);
7827 7827 VN_RELE(nvp);
7828 7828 nfs_rw_exit(&odrp->r_rwlock);
7829 7829 nfs_rw_exit(&ndrp->r_rwlock);
7830 7830 return (0);
7831 7831 }
7832 7832
7833 7833 /*
7834 7834 * Can't mix and match directories and non-
7835 7835 * directories in rename operations. We already
7836 7836 * know that the target is not a directory. If
7837 7837 * the source is a directory, return an error.
7838 7838 */
7839 7839 if (ovp->v_type == VDIR) {
7840 7840 VN_RELE(ovp);
7841 7841 VN_RELE(nvp);
7842 7842 nfs_rw_exit(&odrp->r_rwlock);
7843 7843 nfs_rw_exit(&ndrp->r_rwlock);
7844 7844 return (ENOTDIR);
7845 7845 }
7846 7846 link_call:
7847 7847 /*
7848 7848 * The target file exists, is not the same as
7849 7849 * the source file, and is active. We first
7850 7850 * try to Link it to a temporary filename to
7851 7851 * avoid having the server removing the file
7852 7852 * completely (which could cause data loss to
7853 7853 * the user's POV in the event the Rename fails
7854 7854 * -- see bug 1165874).
7855 7855 */
7856 7856 /*
7857 7857 * The do_link and did_link booleans are
7858 7858 * introduced in the event we get NFS4ERR_FILE_OPEN
7859 7859 * returned for the Rename. Some servers can
7860 7860 * not Rename over an Open file, so they return
7861 7861 * this error. The client needs to Remove the
7862 7862 * newly created Link and do two Renames, just
7863 7863 * as if the server didn't support LINK.
7864 7864 */
7865 7865 tmpname = newname();
7866 7866 error = 0;
7867 7867
7868 7868 if (do_link) {
7869 7869 error = nfs4_link(ndvp, nvp, tmpname, cr,
7870 7870 NULL, 0);
7871 7871 }
7872 7872 if (error == EOPNOTSUPP || !do_link) {
7873 7873 error = nfs4_rename(ndvp, nnm, ndvp, tmpname,
7874 7874 cr, NULL, 0);
7875 7875 did_link = 0;
7876 7876 } else {
7877 7877 did_link = 1;
7878 7878 }
7879 7879 if (error) {
7880 7880 kmem_free(tmpname, MAXNAMELEN);
7881 7881 VN_RELE(ovp);
7882 7882 VN_RELE(nvp);
7883 7883 nfs_rw_exit(&odrp->r_rwlock);
7884 7884 nfs_rw_exit(&ndrp->r_rwlock);
7885 7885 return (error);
7886 7886 }
7887 7887
7888 7888 mutex_enter(&rp->r_statelock);
7889 7889 if (rp->r_unldvp == NULL) {
7890 7890 VN_HOLD(ndvp);
7891 7891 rp->r_unldvp = ndvp;
7892 7892 if (rp->r_unlcred != NULL)
7893 7893 crfree(rp->r_unlcred);
7894 7894 crhold(cr);
7895 7895 rp->r_unlcred = cr;
7896 7896 rp->r_unlname = tmpname;
7897 7897 } else {
7898 7898 if (rp->r_unlname)
7899 7899 kmem_free(rp->r_unlname, MAXNAMELEN);
7900 7900 rp->r_unlname = tmpname;
7901 7901 }
7902 7902 mutex_exit(&rp->r_statelock);
7903 7903 }
7904 7904
7905 7905 (void) nfs4delegreturn(VTOR4(nvp), NFS4_DR_PUSH|NFS4_DR_REOPEN);
7906 7906
7907 7907 ASSERT(nfs4_consistent_type(nvp));
7908 7908 }
7909 7909
7910 7910 if (ovp == NULL) {
7911 7911 /*
7912 7912 * When renaming directories to be a subdirectory of a
7913 7913 * different parent, the dnlc entry for ".." will no
7914 7914 * longer be valid, so it must be removed.
7915 7915 *
7916 7916 * We do a lookup here to determine whether we are renaming
7917 7917 * a directory and we need to check if we are renaming
7918 7918 * an unlinked file. This might have already been done
7919 7919 * in previous code, so we check ovp == NULL to avoid
7920 7920 * doing it twice.
7921 7921 */
7922 7922 error = nfs4lookup(odvp, onm, &ovp, cr, 0);
7923 7923 /*
7924 7924 * The source name *should* already exist.
7925 7925 */
7926 7926 if (error) {
7927 7927 nfs_rw_exit(&odrp->r_rwlock);
7928 7928 nfs_rw_exit(&ndrp->r_rwlock);
7929 7929 if (nvp) {
7930 7930 VN_RELE(nvp);
7931 7931 }
7932 7932 return (error);
7933 7933 }
7934 7934 ASSERT(ovp != NULL);
7935 7935 ASSERT(nfs4_consistent_type(ovp));
7936 7936 }
7937 7937
7938 7938 /*
7939 7939 * Is the object being renamed a dir, and if so, is
7940 7940 * it being renamed to a child of itself? The underlying
7941 7941 * fs should ultimately return EINVAL for this case;
7942 7942 * however, buggy beta non-Solaris NFSv4 servers at
7943 7943 * interop testing events have allowed this behavior,
7944 7944 * and it caused our client to panic due to a recursive
7945 7945 * mutex_enter in fn_move.
7946 7946 *
7947 7947 * The tedious locking in fn_move could be changed to
7948 7948 * deal with this case, and the client could avoid the
7949 7949 * panic; however, the client would just confuse itself
7950 7950 * later and misbehave. A better way to handle the broken
7951 7951 * server is to detect this condition and return EINVAL
7952 7952 * without ever sending the the bogus rename to the server.
7953 7953 * We know the rename is invalid -- just fail it now.
7954 7954 */
7955 7955 if (ovp->v_type == VDIR && VN_CMP(ndvp, ovp)) {
7956 7956 VN_RELE(ovp);
7957 7957 nfs_rw_exit(&odrp->r_rwlock);
7958 7958 nfs_rw_exit(&ndrp->r_rwlock);
7959 7959 if (nvp) {
7960 7960 VN_RELE(nvp);
7961 7961 }
7962 7962 return (EINVAL);
7963 7963 }
7964 7964
7965 7965 (void) nfs4delegreturn(VTOR4(ovp), NFS4_DR_PUSH|NFS4_DR_REOPEN);
7966 7966
7967 7967 /*
7968 7968 * If FH4_VOL_RENAME or FH4_VOLATILE_ANY bits are set, it is
7969 7969 * possible for the filehandle to change due to the rename.
7970 7970 * If neither of these bits is set, but FH4_VOL_MIGRATION is set,
7971 7971 * the fh will not change because of the rename, but we still need
7972 7972 * to update its rnode entry with the new name for
7973 7973 * an eventual fh change due to migration. The FH4_NOEXPIRE_ON_OPEN
7974 7974 * has no effect on these for now, but for future improvements,
7975 7975 * we might want to use it too to simplify handling of files
7976 7976 * that are open with that flag on. (XXX)
7977 7977 */
7978 7978 mi = VTOMI4(odvp);
7979 7979 if (NFS4_VOLATILE_FH(mi))
7980 7980 error = nfs4rename_volatile_fh(odvp, onm, ovp, ndvp, nnm, cr,
7981 7981 &stat);
7982 7982 else
7983 7983 error = nfs4rename_persistent_fh(odvp, onm, ovp, ndvp, nnm, cr,
7984 7984 &stat);
7985 7985
7986 7986 ASSERT(nfs4_consistent_type(odvp));
7987 7987 ASSERT(nfs4_consistent_type(ndvp));
7988 7988 ASSERT(nfs4_consistent_type(ovp));
7989 7989
7990 7990 if (stat == NFS4ERR_FILE_OPEN && did_link) {
7991 7991 do_link = 0;
7992 7992 /*
7993 7993 * Before the 'link_call' code, we did a nfs4_lookup
7994 7994 * that puts a VN_HOLD on nvp. After the nfs4_link
7995 7995 * call we call VN_RELE to match that hold. We need
7996 7996 * to place an additional VN_HOLD here since we will
7997 7997 * be hitting that VN_RELE again.
7998 7998 */
7999 7999 VN_HOLD(nvp);
8000 8000
8001 8001 (void) nfs4_remove(ndvp, tmpname, cr, NULL, 0);
8002 8002
8003 8003 /* Undo the unlinked file naming stuff we just did */
8004 8004 mutex_enter(&rp->r_statelock);
8005 8005 if (rp->r_unldvp) {
8006 8006 VN_RELE(ndvp);
8007 8007 rp->r_unldvp = NULL;
8008 8008 if (rp->r_unlcred != NULL)
8009 8009 crfree(rp->r_unlcred);
8010 8010 rp->r_unlcred = NULL;
8011 8011 /* rp->r_unlanme points to tmpname */
8012 8012 if (rp->r_unlname)
8013 8013 kmem_free(rp->r_unlname, MAXNAMELEN);
8014 8014 rp->r_unlname = NULL;
8015 8015 }
8016 8016 mutex_exit(&rp->r_statelock);
8017 8017
8018 8018 if (nvp) {
8019 8019 VN_RELE(nvp);
8020 8020 }
8021 8021 goto link_call;
8022 8022 }
8023 8023
8024 8024 if (error) {
8025 8025 VN_RELE(ovp);
8026 8026 nfs_rw_exit(&odrp->r_rwlock);
8027 8027 nfs_rw_exit(&ndrp->r_rwlock);
8028 8028 if (nvp) {
8029 8029 VN_RELE(nvp);
8030 8030 }
8031 8031 return (error);
8032 8032 }
8033 8033
8034 8034 /*
8035 8035 * when renaming directories to be a subdirectory of a
8036 8036 * different parent, the dnlc entry for ".." will no
8037 8037 * longer be valid, so it must be removed
8038 8038 */
8039 8039 rp = VTOR4(ovp);
8040 8040 if (ndvp != odvp) {
8041 8041 if (ovp->v_type == VDIR) {
8042 8042 dnlc_remove(ovp, "..");
8043 8043 if (rp->r_dir != NULL)
8044 8044 nfs4_purge_rddir_cache(ovp);
8045 8045 }
8046 8046 }
8047 8047
8048 8048 /*
8049 8049 * If we are renaming the unlinked file, update the
8050 8050 * r_unldvp and r_unlname as needed.
8051 8051 */
8052 8052 mutex_enter(&rp->r_statelock);
8053 8053 if (rp->r_unldvp != NULL) {
8054 8054 if (strcmp(rp->r_unlname, onm) == 0) {
8055 8055 (void) strncpy(rp->r_unlname, nnm, MAXNAMELEN);
8056 8056 rp->r_unlname[MAXNAMELEN - 1] = '\0';
8057 8057 if (ndvp != rp->r_unldvp) {
8058 8058 VN_RELE(rp->r_unldvp);
8059 8059 rp->r_unldvp = ndvp;
8060 8060 VN_HOLD(ndvp);
8061 8061 }
8062 8062 }
8063 8063 }
8064 8064 mutex_exit(&rp->r_statelock);
8065 8065
8066 8066 /*
8067 8067 * Notify the rename vnevents to source vnode, and to the target
8068 8068 * vnode if it already existed.
8069 8069 */
8070 8070 if (error == 0) {
8071 8071 vnode_t *tvp, *tovp;
8072 8072 rnode4_t *trp;
8073 8073
8074 8074 /*
8075 8075 * Notify the vnode. Each links is represented by
8076 8076 * a different vnode, in nfsv4.
8077 8077 */
8078 8078 if (nvp) {
8079 8079 trp = VTOR4(nvp);
8080 8080 tvp = nvp;
8081 8081 if (IS_SHADOW(nvp, trp))
8082 8082 tvp = RTOV4(trp);
8083 8083 vnevent_rename_dest(tvp, ndvp, nnm, ct);
8084 8084 }
8085 8085
8086 8086 trp = VTOR4(ovp);
8087 8087 tovp = ovp;
8088 8088 if (IS_SHADOW(ovp, trp))
8089 8089 tovp = RTOV4(trp);
8090 8090
8091 8091 vnevent_rename_src(tovp, odvp, onm, ct);
8092 8092
8093 8093 trp = VTOR4(ndvp);
8094 8094 tvp = ndvp;
8095 8095
8096 8096 if (IS_SHADOW(ndvp, trp))
8097 8097 tvp = RTOV4(trp);
8098 8098
8099 8099 vnevent_rename_dest_dir(tvp, tovp, nnm, ct);
8100 8100 }
8101 8101
8102 8102 if (nvp) {
8103 8103 VN_RELE(nvp);
8104 8104 }
8105 8105 VN_RELE(ovp);
8106 8106
8107 8107 nfs_rw_exit(&odrp->r_rwlock);
8108 8108 nfs_rw_exit(&ndrp->r_rwlock);
8109 8109
8110 8110 return (error);
8111 8111 }
8112 8112
8113 8113 /*
8114 8114 * When the parent directory has changed, sv_dfh must be updated
8115 8115 */
8116 8116 static void
8117 8117 update_parentdir_sfh(vnode_t *vp, vnode_t *ndvp)
8118 8118 {
8119 8119 svnode_t *sv = VTOSV(vp);
8120 8120 nfs4_sharedfh_t *old_dfh = sv->sv_dfh;
8121 8121 nfs4_sharedfh_t *new_dfh = VTOR4(ndvp)->r_fh;
8122 8122
8123 8123 sfh4_hold(new_dfh);
8124 8124 sv->sv_dfh = new_dfh;
8125 8125 sfh4_rele(&old_dfh);
8126 8126 }
8127 8127
8128 8128 /*
8129 8129 * nfs4rename_persistent does the otw portion of renaming in NFS Version 4,
8130 8130 * when it is known that the filehandle is persistent through rename.
8131 8131 *
8132 8132 * Rename requires that the current fh be the target directory and the
8133 8133 * saved fh be the source directory. After the operation, the current fh
8134 8134 * is unchanged.
8135 8135 * The compound op structure for persistent fh rename is:
8136 8136 * PUTFH(sourcdir), SAVEFH, PUTFH(targetdir), RENAME
8137 8137 * Rather than bother with the directory postop args, we'll simply
8138 8138 * update that a change occurred in the cache, so no post-op getattrs.
8139 8139 */
8140 8140 static int
8141 8141 nfs4rename_persistent_fh(vnode_t *odvp, char *onm, vnode_t *renvp,
8142 8142 vnode_t *ndvp, char *nnm, cred_t *cr, nfsstat4 *statp)
8143 8143 {
8144 8144 COMPOUND4args_clnt args;
8145 8145 COMPOUND4res_clnt res, *resp = NULL;
8146 8146 nfs_argop4 *argop;
8147 8147 nfs_resop4 *resop;
8148 8148 int doqueue, argoplist_size;
8149 8149 mntinfo4_t *mi;
8150 8150 rnode4_t *odrp = VTOR4(odvp);
8151 8151 rnode4_t *ndrp = VTOR4(ndvp);
8152 8152 RENAME4res *rn_res;
8153 8153 bool_t needrecov;
8154 8154 nfs4_recov_state_t recov_state;
8155 8155 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
8156 8156 dirattr_info_t dinfo, *dinfop;
8157 8157
8158 8158 ASSERT(nfs_zone() == VTOMI4(odvp)->mi_zone);
8159 8159
8160 8160 recov_state.rs_flags = 0;
8161 8161 recov_state.rs_num_retry_despite_err = 0;
8162 8162
8163 8163 /*
8164 8164 * Rename ops: putfh sdir; savefh; putfh tdir; rename; getattr tdir
8165 8165 *
8166 8166 * If source/target are different dirs, then append putfh(src); getattr
8167 8167 */
8168 8168 args.array_len = (odvp == ndvp) ? 5 : 7;
8169 8169 argoplist_size = args.array_len * sizeof (nfs_argop4);
8170 8170 args.array = argop = kmem_alloc(argoplist_size, KM_SLEEP);
8171 8171
8172 8172 recov_retry:
8173 8173 *statp = NFS4_OK;
8174 8174
8175 8175 /* No need to Lookup the file, persistent fh */
8176 8176 args.ctag = TAG_RENAME;
8177 8177
8178 8178 mi = VTOMI4(odvp);
8179 8179 e.error = nfs4_start_op(mi, odvp, ndvp, &recov_state);
8180 8180 if (e.error) {
8181 8181 kmem_free(argop, argoplist_size);
8182 8182 return (e.error);
8183 8183 }
8184 8184
8185 8185 /* 0: putfh source directory */
8186 8186 argop[0].argop = OP_CPUTFH;
8187 8187 argop[0].nfs_argop4_u.opcputfh.sfh = odrp->r_fh;
8188 8188
8189 8189 /* 1: Save source fh to free up current for target */
8190 8190 argop[1].argop = OP_SAVEFH;
8191 8191
8192 8192 /* 2: putfh targetdir */
8193 8193 argop[2].argop = OP_CPUTFH;
8194 8194 argop[2].nfs_argop4_u.opcputfh.sfh = ndrp->r_fh;
8195 8195
8196 8196 /* 3: current_fh is targetdir, saved_fh is sourcedir */
8197 8197 argop[3].argop = OP_CRENAME;
8198 8198 argop[3].nfs_argop4_u.opcrename.coldname = onm;
8199 8199 argop[3].nfs_argop4_u.opcrename.cnewname = nnm;
8200 8200
8201 8201 /* 4: getattr (targetdir) */
8202 8202 argop[4].argop = OP_GETATTR;
8203 8203 argop[4].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
8204 8204 argop[4].nfs_argop4_u.opgetattr.mi = mi;
8205 8205
8206 8206 if (ndvp != odvp) {
8207 8207
8208 8208 /* 5: putfh (sourcedir) */
8209 8209 argop[5].argop = OP_CPUTFH;
8210 8210 argop[5].nfs_argop4_u.opcputfh.sfh = ndrp->r_fh;
8211 8211
8212 8212 /* 6: getattr (sourcedir) */
8213 8213 argop[6].argop = OP_GETATTR;
8214 8214 argop[6].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
8215 8215 argop[6].nfs_argop4_u.opgetattr.mi = mi;
8216 8216 }
8217 8217
8218 8218 dnlc_remove(odvp, onm);
8219 8219 dnlc_remove(ndvp, nnm);
8220 8220
8221 8221 doqueue = 1;
8222 8222 dinfo.di_time_call = gethrtime();
8223 8223 rfs4call(mi, &args, &res, cr, &doqueue, 0, &e);
8224 8224
8225 8225 needrecov = nfs4_needs_recovery(&e, FALSE, mi->mi_vfsp);
8226 8226 if (e.error) {
8227 8227 PURGE_ATTRCACHE4(odvp);
8228 8228 PURGE_ATTRCACHE4(ndvp);
8229 8229 } else {
8230 8230 *statp = res.status;
8231 8231 }
8232 8232
8233 8233 if (needrecov) {
8234 8234 if (nfs4_start_recovery(&e, mi, odvp, ndvp, NULL, NULL,
8235 8235 OP_RENAME, NULL, NULL, NULL) == FALSE) {
8236 8236 nfs4_end_op(mi, odvp, ndvp, &recov_state, needrecov);
8237 8237 if (!e.error)
8238 8238 (void) xdr_free(xdr_COMPOUND4res_clnt,
8239 8239 (caddr_t)&res);
8240 8240 goto recov_retry;
8241 8241 }
8242 8242 }
8243 8243
8244 8244 if (!e.error) {
8245 8245 resp = &res;
8246 8246 /*
8247 8247 * as long as OP_RENAME
8248 8248 */
8249 8249 if (res.status != NFS4_OK && res.array_len <= 4) {
8250 8250 e.error = geterrno4(res.status);
8251 8251 PURGE_ATTRCACHE4(odvp);
8252 8252 PURGE_ATTRCACHE4(ndvp);
8253 8253 /*
8254 8254 * System V defines rename to return EEXIST, not
8255 8255 * ENOTEMPTY if the target directory is not empty.
8256 8256 * Over the wire, the error is NFSERR_ENOTEMPTY
8257 8257 * which geterrno4 maps to ENOTEMPTY.
8258 8258 */
8259 8259 if (e.error == ENOTEMPTY)
8260 8260 e.error = EEXIST;
8261 8261 } else {
8262 8262
8263 8263 resop = &res.array[3]; /* rename res */
8264 8264 rn_res = &resop->nfs_resop4_u.oprename;
8265 8265
8266 8266 if (res.status == NFS4_OK) {
8267 8267 /*
8268 8268 * Update target attribute, readdir and dnlc
8269 8269 * caches.
8270 8270 */
8271 8271 dinfo.di_garp =
8272 8272 &res.array[4].nfs_resop4_u.opgetattr.ga_res;
8273 8273 dinfo.di_cred = cr;
8274 8274 dinfop = &dinfo;
8275 8275 } else
8276 8276 dinfop = NULL;
8277 8277
8278 8278 nfs4_update_dircaches(&rn_res->target_cinfo,
8279 8279 ndvp, NULL, NULL, dinfop);
8280 8280
8281 8281 /*
8282 8282 * Update source attribute, readdir and dnlc caches
8283 8283 *
8284 8284 */
8285 8285 if (ndvp != odvp) {
8286 8286 update_parentdir_sfh(renvp, ndvp);
8287 8287
8288 8288 if (dinfop)
8289 8289 dinfo.di_garp =
8290 8290 &(res.array[6].nfs_resop4_u.
8291 8291 opgetattr.ga_res);
8292 8292
8293 8293 nfs4_update_dircaches(&rn_res->source_cinfo,
8294 8294 odvp, NULL, NULL, dinfop);
8295 8295 }
8296 8296
8297 8297 fn_move(VTOSV(renvp)->sv_name, VTOSV(ndvp)->sv_name,
8298 8298 nnm);
8299 8299 }
8300 8300 }
8301 8301
8302 8302 if (resp)
8303 8303 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
8304 8304 nfs4_end_op(mi, odvp, ndvp, &recov_state, needrecov);
8305 8305 kmem_free(argop, argoplist_size);
8306 8306
8307 8307 return (e.error);
8308 8308 }
8309 8309
8310 8310 /*
8311 8311 * nfs4rename_volatile_fh does the otw part of renaming in NFS Version 4, when
8312 8312 * it is possible for the filehandle to change due to the rename.
8313 8313 *
8314 8314 * The compound req in this case includes a post-rename lookup and getattr
8315 8315 * to ensure that we have the correct fh and attributes for the object.
8316 8316 *
8317 8317 * Rename requires that the current fh be the target directory and the
8318 8318 * saved fh be the source directory. After the operation, the current fh
8319 8319 * is unchanged.
8320 8320 *
8321 8321 * We need the new filehandle (hence a LOOKUP and GETFH) so that we can
8322 8322 * update the filehandle for the renamed object. We also get the old
8323 8323 * filehandle for historical reasons; this should be taken out sometime.
8324 8324 * This results in a rather cumbersome compound...
8325 8325 *
8326 8326 * PUTFH(sourcdir), SAVEFH, LOOKUP(src), GETFH(old),
8327 8327 * PUTFH(targetdir), RENAME, LOOKUP(trgt), GETFH(new), GETATTR
8328 8328 *
8329 8329 */
8330 8330 static int
8331 8331 nfs4rename_volatile_fh(vnode_t *odvp, char *onm, vnode_t *ovp,
8332 8332 vnode_t *ndvp, char *nnm, cred_t *cr, nfsstat4 *statp)
8333 8333 {
8334 8334 COMPOUND4args_clnt args;
8335 8335 COMPOUND4res_clnt res, *resp = NULL;
8336 8336 int argoplist_size;
8337 8337 nfs_argop4 *argop;
8338 8338 nfs_resop4 *resop;
8339 8339 int doqueue;
8340 8340 mntinfo4_t *mi;
8341 8341 rnode4_t *odrp = VTOR4(odvp); /* old directory */
8342 8342 rnode4_t *ndrp = VTOR4(ndvp); /* new directory */
8343 8343 rnode4_t *orp = VTOR4(ovp); /* object being renamed */
8344 8344 RENAME4res *rn_res;
8345 8345 GETFH4res *ngf_res;
8346 8346 bool_t needrecov;
8347 8347 nfs4_recov_state_t recov_state;
8348 8348 hrtime_t t;
8349 8349 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
8350 8350 dirattr_info_t dinfo, *dinfop = &dinfo;
8351 8351
8352 8352 ASSERT(nfs_zone() == VTOMI4(odvp)->mi_zone);
8353 8353
8354 8354 recov_state.rs_flags = 0;
8355 8355 recov_state.rs_num_retry_despite_err = 0;
8356 8356
8357 8357 recov_retry:
8358 8358 *statp = NFS4_OK;
8359 8359
8360 8360 /*
8361 8361 * There is a window between the RPC and updating the path and
8362 8362 * filehandle stored in the rnode. Lock out the FHEXPIRED recovery
8363 8363 * code, so that it doesn't try to use the old path during that
8364 8364 * window.
8365 8365 */
8366 8366 mutex_enter(&orp->r_statelock);
8367 8367 while (orp->r_flags & R4RECEXPFH) {
8368 8368 klwp_t *lwp = ttolwp(curthread);
8369 8369
8370 8370 if (lwp != NULL)
8371 8371 lwp->lwp_nostop++;
8372 8372 if (cv_wait_sig(&orp->r_cv, &orp->r_statelock) == 0) {
8373 8373 mutex_exit(&orp->r_statelock);
8374 8374 if (lwp != NULL)
8375 8375 lwp->lwp_nostop--;
8376 8376 return (EINTR);
8377 8377 }
8378 8378 if (lwp != NULL)
8379 8379 lwp->lwp_nostop--;
8380 8380 }
8381 8381 orp->r_flags |= R4RECEXPFH;
8382 8382 mutex_exit(&orp->r_statelock);
8383 8383
8384 8384 mi = VTOMI4(odvp);
8385 8385
8386 8386 args.ctag = TAG_RENAME_VFH;
8387 8387 args.array_len = (odvp == ndvp) ? 10 : 12;
8388 8388 argoplist_size = args.array_len * sizeof (nfs_argop4);
8389 8389 argop = kmem_alloc(argoplist_size, KM_SLEEP);
8390 8390
8391 8391 /*
8392 8392 * Rename ops:
8393 8393 * PUTFH(sourcdir), SAVEFH, LOOKUP(src), GETFH(old),
8394 8394 * PUTFH(targetdir), RENAME, GETATTR(targetdir)
8395 8395 * LOOKUP(trgt), GETFH(new), GETATTR,
8396 8396 *
8397 8397 * if (odvp != ndvp)
8398 8398 * add putfh(sourcedir), getattr(sourcedir) }
8399 8399 */
8400 8400 args.array = argop;
8401 8401
8402 8402 e.error = nfs4_start_fop(mi, odvp, ndvp, OH_VFH_RENAME,
8403 8403 &recov_state, NULL);
8404 8404 if (e.error) {
8405 8405 kmem_free(argop, argoplist_size);
8406 8406 mutex_enter(&orp->r_statelock);
8407 8407 orp->r_flags &= ~R4RECEXPFH;
8408 8408 cv_broadcast(&orp->r_cv);
8409 8409 mutex_exit(&orp->r_statelock);
8410 8410 return (e.error);
8411 8411 }
8412 8412
8413 8413 /* 0: putfh source directory */
8414 8414 argop[0].argop = OP_CPUTFH;
8415 8415 argop[0].nfs_argop4_u.opcputfh.sfh = odrp->r_fh;
8416 8416
8417 8417 /* 1: Save source fh to free up current for target */
8418 8418 argop[1].argop = OP_SAVEFH;
8419 8419
8420 8420 /* 2: Lookup pre-rename fh of renamed object */
8421 8421 argop[2].argop = OP_CLOOKUP;
8422 8422 argop[2].nfs_argop4_u.opclookup.cname = onm;
8423 8423
8424 8424 /* 3: getfh fh of renamed object (before rename) */
8425 8425 argop[3].argop = OP_GETFH;
8426 8426
8427 8427 /* 4: putfh targetdir */
8428 8428 argop[4].argop = OP_CPUTFH;
8429 8429 argop[4].nfs_argop4_u.opcputfh.sfh = ndrp->r_fh;
8430 8430
8431 8431 /* 5: current_fh is targetdir, saved_fh is sourcedir */
8432 8432 argop[5].argop = OP_CRENAME;
8433 8433 argop[5].nfs_argop4_u.opcrename.coldname = onm;
8434 8434 argop[5].nfs_argop4_u.opcrename.cnewname = nnm;
8435 8435
8436 8436 /* 6: getattr of target dir (post op attrs) */
8437 8437 argop[6].argop = OP_GETATTR;
8438 8438 argop[6].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
8439 8439 argop[6].nfs_argop4_u.opgetattr.mi = mi;
8440 8440
8441 8441 /* 7: Lookup post-rename fh of renamed object */
8442 8442 argop[7].argop = OP_CLOOKUP;
8443 8443 argop[7].nfs_argop4_u.opclookup.cname = nnm;
8444 8444
8445 8445 /* 8: getfh fh of renamed object (after rename) */
8446 8446 argop[8].argop = OP_GETFH;
8447 8447
8448 8448 /* 9: getattr of renamed object */
8449 8449 argop[9].argop = OP_GETATTR;
8450 8450 argop[9].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
8451 8451 argop[9].nfs_argop4_u.opgetattr.mi = mi;
8452 8452
8453 8453 /*
8454 8454 * If source/target dirs are different, then get new post-op
8455 8455 * attrs for source dir also.
8456 8456 */
8457 8457 if (ndvp != odvp) {
8458 8458 /* 10: putfh (sourcedir) */
8459 8459 argop[10].argop = OP_CPUTFH;
8460 8460 argop[10].nfs_argop4_u.opcputfh.sfh = ndrp->r_fh;
8461 8461
8462 8462 /* 11: getattr (sourcedir) */
8463 8463 argop[11].argop = OP_GETATTR;
8464 8464 argop[11].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
8465 8465 argop[11].nfs_argop4_u.opgetattr.mi = mi;
8466 8466 }
8467 8467
8468 8468 dnlc_remove(odvp, onm);
8469 8469 dnlc_remove(ndvp, nnm);
8470 8470
8471 8471 doqueue = 1;
8472 8472 t = gethrtime();
8473 8473 rfs4call(mi, &args, &res, cr, &doqueue, 0, &e);
8474 8474
8475 8475 needrecov = nfs4_needs_recovery(&e, FALSE, mi->mi_vfsp);
8476 8476 if (e.error) {
8477 8477 PURGE_ATTRCACHE4(odvp);
8478 8478 PURGE_ATTRCACHE4(ndvp);
8479 8479 if (!needrecov) {
8480 8480 nfs4_end_fop(mi, odvp, ndvp, OH_VFH_RENAME,
8481 8481 &recov_state, needrecov);
8482 8482 goto out;
8483 8483 }
8484 8484 } else {
8485 8485 *statp = res.status;
8486 8486 }
8487 8487
8488 8488 if (needrecov) {
8489 8489 bool_t abort;
8490 8490
8491 8491 abort = nfs4_start_recovery(&e, mi, odvp, ndvp, NULL, NULL,
8492 8492 OP_RENAME, NULL, NULL, NULL);
8493 8493 if (abort == FALSE) {
8494 8494 nfs4_end_fop(mi, odvp, ndvp, OH_VFH_RENAME,
8495 8495 &recov_state, needrecov);
8496 8496 kmem_free(argop, argoplist_size);
8497 8497 if (!e.error)
8498 8498 (void) xdr_free(xdr_COMPOUND4res_clnt,
8499 8499 (caddr_t)&res);
8500 8500 mutex_enter(&orp->r_statelock);
8501 8501 orp->r_flags &= ~R4RECEXPFH;
8502 8502 cv_broadcast(&orp->r_cv);
8503 8503 mutex_exit(&orp->r_statelock);
8504 8504 goto recov_retry;
8505 8505 } else {
8506 8506 if (e.error != 0) {
8507 8507 nfs4_end_fop(mi, odvp, ndvp, OH_VFH_RENAME,
8508 8508 &recov_state, needrecov);
8509 8509 goto out;
8510 8510 }
8511 8511 /* fall through for res.status case */
8512 8512 }
8513 8513 }
8514 8514
8515 8515 resp = &res;
8516 8516 /*
8517 8517 * If OP_RENAME (or any prev op) failed, then return an error.
8518 8518 * OP_RENAME is index 5, so if array len <= 6 we return an error.
8519 8519 */
8520 8520 if ((res.status != NFS4_OK) && (res.array_len <= 6)) {
8521 8521 /*
8522 8522 * Error in an op other than last Getattr
8523 8523 */
8524 8524 e.error = geterrno4(res.status);
8525 8525 PURGE_ATTRCACHE4(odvp);
8526 8526 PURGE_ATTRCACHE4(ndvp);
8527 8527 /*
8528 8528 * System V defines rename to return EEXIST, not
8529 8529 * ENOTEMPTY if the target directory is not empty.
8530 8530 * Over the wire, the error is NFSERR_ENOTEMPTY
8531 8531 * which geterrno4 maps to ENOTEMPTY.
8532 8532 */
8533 8533 if (e.error == ENOTEMPTY)
8534 8534 e.error = EEXIST;
8535 8535 nfs4_end_fop(mi, odvp, ndvp, OH_VFH_RENAME, &recov_state,
8536 8536 needrecov);
8537 8537 goto out;
8538 8538 }
8539 8539
8540 8540 /* rename results */
8541 8541 rn_res = &res.array[5].nfs_resop4_u.oprename;
8542 8542
8543 8543 if (res.status == NFS4_OK) {
8544 8544 /* Update target attribute, readdir and dnlc caches */
8545 8545 dinfo.di_garp =
8546 8546 &res.array[6].nfs_resop4_u.opgetattr.ga_res;
8547 8547 dinfo.di_cred = cr;
8548 8548 dinfo.di_time_call = t;
8549 8549 } else
8550 8550 dinfop = NULL;
8551 8551
8552 8552 /* Update source cache attribute, readdir and dnlc caches */
8553 8553 nfs4_update_dircaches(&rn_res->target_cinfo, ndvp, NULL, NULL, dinfop);
8554 8554
8555 8555 /* Update source cache attribute, readdir and dnlc caches */
8556 8556 if (ndvp != odvp) {
8557 8557 update_parentdir_sfh(ovp, ndvp);
8558 8558
8559 8559 /*
8560 8560 * If dinfop is non-NULL, then compound succeded, so
8561 8561 * set di_garp to attrs for source dir. dinfop is only
8562 8562 * set to NULL when compound fails.
8563 8563 */
8564 8564 if (dinfop)
8565 8565 dinfo.di_garp =
8566 8566 &res.array[11].nfs_resop4_u.opgetattr.ga_res;
8567 8567 nfs4_update_dircaches(&rn_res->source_cinfo, odvp, NULL, NULL,
8568 8568 dinfop);
8569 8569 }
8570 8570
8571 8571 /*
8572 8572 * Update the rnode with the new component name and args,
8573 8573 * and if the file handle changed, also update it with the new fh.
8574 8574 * This is only necessary if the target object has an rnode
8575 8575 * entry and there is no need to create one for it.
8576 8576 */
8577 8577 resop = &res.array[8]; /* getfh new res */
8578 8578 ngf_res = &resop->nfs_resop4_u.opgetfh;
8579 8579
8580 8580 /*
8581 8581 * Update the path and filehandle for the renamed object.
8582 8582 */
8583 8583 nfs4rename_update(ovp, ndvp, &ngf_res->object, nnm);
8584 8584
8585 8585 nfs4_end_fop(mi, odvp, ndvp, OH_VFH_RENAME, &recov_state, needrecov);
8586 8586
8587 8587 if (res.status == NFS4_OK) {
8588 8588 resop++; /* getattr res */
8589 8589 e.error = nfs4_update_attrcache(res.status,
8590 8590 &resop->nfs_resop4_u.opgetattr.ga_res,
8591 8591 t, ovp, cr);
8592 8592 }
8593 8593
8594 8594 out:
8595 8595 kmem_free(argop, argoplist_size);
8596 8596 if (resp)
8597 8597 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
8598 8598 mutex_enter(&orp->r_statelock);
8599 8599 orp->r_flags &= ~R4RECEXPFH;
8600 8600 cv_broadcast(&orp->r_cv);
8601 8601 mutex_exit(&orp->r_statelock);
8602 8602
8603 8603 return (e.error);
8604 8604 }
8605 8605
8606 8606 /* ARGSUSED */
8607 8607 static int
8608 8608 nfs4_mkdir(vnode_t *dvp, char *nm, struct vattr *va, vnode_t **vpp, cred_t *cr,
8609 8609 caller_context_t *ct, int flags, vsecattr_t *vsecp)
8610 8610 {
8611 8611 int error;
8612 8612 vnode_t *vp;
8613 8613
8614 8614 if (nfs_zone() != VTOMI4(dvp)->mi_zone)
8615 8615 return (EPERM);
8616 8616 /*
8617 8617 * As ".." has special meaning and rather than send a mkdir
8618 8618 * over the wire to just let the server freak out, we just
8619 8619 * short circuit it here and return EEXIST
8620 8620 */
8621 8621 if (nm[0] == '.' && nm[1] == '.' && nm[2] == '\0')
8622 8622 return (EEXIST);
8623 8623
8624 8624 /*
8625 8625 * Decision to get the right gid and setgid bit of the
8626 8626 * new directory is now made in call_nfs4_create_req.
8627 8627 */
8628 8628 va->va_mask |= AT_MODE;
8629 8629 error = call_nfs4_create_req(dvp, nm, NULL, va, &vp, cr, NF4DIR);
8630 8630 if (error)
8631 8631 return (error);
8632 8632
8633 8633 *vpp = vp;
8634 8634 return (0);
8635 8635 }
8636 8636
8637 8637
8638 8638 /*
8639 8639 * rmdir is using the same remove v4 op as does remove.
8640 8640 * Remove requires that the current fh be the target directory.
8641 8641 * After the operation, the current fh is unchanged.
8642 8642 * The compound op structure is:
8643 8643 * PUTFH(targetdir), REMOVE
8644 8644 */
8645 8645 /*ARGSUSED4*/
8646 8646 static int
8647 8647 nfs4_rmdir(vnode_t *dvp, char *nm, vnode_t *cdir, cred_t *cr,
8648 8648 caller_context_t *ct, int flags)
8649 8649 {
8650 8650 int need_end_op = FALSE;
8651 8651 COMPOUND4args_clnt args;
8652 8652 COMPOUND4res_clnt res, *resp = NULL;
8653 8653 REMOVE4res *rm_res;
8654 8654 nfs_argop4 argop[3];
8655 8655 nfs_resop4 *resop;
8656 8656 vnode_t *vp;
8657 8657 int doqueue;
8658 8658 mntinfo4_t *mi;
8659 8659 rnode4_t *drp;
8660 8660 bool_t needrecov = FALSE;
8661 8661 nfs4_recov_state_t recov_state;
8662 8662 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
8663 8663 dirattr_info_t dinfo, *dinfop;
8664 8664
8665 8665 if (nfs_zone() != VTOMI4(dvp)->mi_zone)
8666 8666 return (EPERM);
8667 8667 /*
8668 8668 * As ".." has special meaning and rather than send a rmdir
8669 8669 * over the wire to just let the server freak out, we just
8670 8670 * short circuit it here and return EEXIST
8671 8671 */
8672 8672 if (nm[0] == '.' && nm[1] == '.' && nm[2] == '\0')
8673 8673 return (EEXIST);
8674 8674
8675 8675 drp = VTOR4(dvp);
8676 8676 if (nfs_rw_enter_sig(&drp->r_rwlock, RW_WRITER, INTR4(dvp)))
8677 8677 return (EINTR);
8678 8678
8679 8679 /*
8680 8680 * Attempt to prevent a rmdir(".") from succeeding.
8681 8681 */
8682 8682 e.error = nfs4lookup(dvp, nm, &vp, cr, 0);
8683 8683 if (e.error) {
8684 8684 nfs_rw_exit(&drp->r_rwlock);
8685 8685 return (e.error);
8686 8686 }
8687 8687 if (vp == cdir) {
8688 8688 VN_RELE(vp);
8689 8689 nfs_rw_exit(&drp->r_rwlock);
8690 8690 return (EINVAL);
8691 8691 }
8692 8692
8693 8693 /*
8694 8694 * Since nfsv4 remove op works on both files and directories,
8695 8695 * check that the removed object is indeed a directory.
8696 8696 */
8697 8697 if (vp->v_type != VDIR) {
8698 8698 VN_RELE(vp);
8699 8699 nfs_rw_exit(&drp->r_rwlock);
8700 8700 return (ENOTDIR);
8701 8701 }
8702 8702
8703 8703 /*
8704 8704 * First just remove the entry from the name cache, as it
8705 8705 * is most likely an entry for this vp.
8706 8706 */
8707 8707 dnlc_remove(dvp, nm);
8708 8708
8709 8709 /*
8710 8710 * If there vnode reference count is greater than one, then
8711 8711 * there may be additional references in the DNLC which will
8712 8712 * need to be purged. First, trying removing the entry for
8713 8713 * the parent directory and see if that removes the additional
8714 8714 * reference(s). If that doesn't do it, then use dnlc_purge_vp
8715 8715 * to completely remove any references to the directory which
8716 8716 * might still exist in the DNLC.
8717 8717 */
8718 8718 if (vp->v_count > 1) {
8719 8719 dnlc_remove(vp, "..");
8720 8720 if (vp->v_count > 1)
8721 8721 dnlc_purge_vp(vp);
8722 8722 }
8723 8723
8724 8724 mi = VTOMI4(dvp);
8725 8725 recov_state.rs_flags = 0;
8726 8726 recov_state.rs_num_retry_despite_err = 0;
8727 8727
8728 8728 recov_retry:
8729 8729 args.ctag = TAG_RMDIR;
8730 8730
8731 8731 /*
8732 8732 * Rmdir ops: putfh dir; remove
8733 8733 */
8734 8734 args.array_len = 3;
8735 8735 args.array = argop;
8736 8736
8737 8737 e.error = nfs4_start_op(VTOMI4(dvp), dvp, NULL, &recov_state);
8738 8738 if (e.error) {
8739 8739 nfs_rw_exit(&drp->r_rwlock);
8740 8740 return (e.error);
8741 8741 }
8742 8742 need_end_op = TRUE;
8743 8743
8744 8744 /* putfh directory */
8745 8745 argop[0].argop = OP_CPUTFH;
8746 8746 argop[0].nfs_argop4_u.opcputfh.sfh = drp->r_fh;
8747 8747
8748 8748 /* remove */
8749 8749 argop[1].argop = OP_CREMOVE;
8750 8750 argop[1].nfs_argop4_u.opcremove.ctarget = nm;
8751 8751
8752 8752 /* getattr (postop attrs for dir that contained removed dir) */
8753 8753 argop[2].argop = OP_GETATTR;
8754 8754 argop[2].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
8755 8755 argop[2].nfs_argop4_u.opgetattr.mi = mi;
8756 8756
8757 8757 dinfo.di_time_call = gethrtime();
8758 8758 doqueue = 1;
8759 8759 rfs4call(mi, &args, &res, cr, &doqueue, 0, &e);
8760 8760
8761 8761 PURGE_ATTRCACHE4(vp);
8762 8762
8763 8763 needrecov = nfs4_needs_recovery(&e, FALSE, mi->mi_vfsp);
8764 8764 if (e.error) {
8765 8765 PURGE_ATTRCACHE4(dvp);
8766 8766 }
8767 8767
8768 8768 if (needrecov) {
8769 8769 if (nfs4_start_recovery(&e, VTOMI4(dvp), dvp, NULL, NULL,
8770 8770 NULL, OP_REMOVE, NULL, NULL, NULL) == FALSE) {
8771 8771 if (!e.error)
8772 8772 (void) xdr_free(xdr_COMPOUND4res_clnt,
8773 8773 (caddr_t)&res);
8774 8774
8775 8775 nfs4_end_op(VTOMI4(dvp), dvp, NULL, &recov_state,
8776 8776 needrecov);
8777 8777 need_end_op = FALSE;
8778 8778 goto recov_retry;
8779 8779 }
8780 8780 }
8781 8781
8782 8782 if (!e.error) {
8783 8783 resp = &res;
8784 8784
8785 8785 /*
8786 8786 * Only return error if first 2 ops (OP_REMOVE or earlier)
8787 8787 * failed.
8788 8788 */
8789 8789 if (res.status != NFS4_OK && res.array_len <= 2) {
8790 8790 e.error = geterrno4(res.status);
8791 8791 PURGE_ATTRCACHE4(dvp);
8792 8792 nfs4_end_op(VTOMI4(dvp), dvp, NULL,
8793 8793 &recov_state, needrecov);
8794 8794 need_end_op = FALSE;
8795 8795 nfs4_purge_stale_fh(e.error, dvp, cr);
8796 8796 /*
8797 8797 * System V defines rmdir to return EEXIST, not
8798 8798 * ENOTEMPTY if the directory is not empty. Over
8799 8799 * the wire, the error is NFSERR_ENOTEMPTY which
8800 8800 * geterrno4 maps to ENOTEMPTY.
8801 8801 */
8802 8802 if (e.error == ENOTEMPTY)
8803 8803 e.error = EEXIST;
8804 8804 } else {
8805 8805 resop = &res.array[1]; /* remove res */
8806 8806 rm_res = &resop->nfs_resop4_u.opremove;
8807 8807
8808 8808 if (res.status == NFS4_OK) {
8809 8809 resop = &res.array[2]; /* dir attrs */
8810 8810 dinfo.di_garp =
8811 8811 &resop->nfs_resop4_u.opgetattr.ga_res;
8812 8812 dinfo.di_cred = cr;
8813 8813 dinfop = &dinfo;
8814 8814 } else
8815 8815 dinfop = NULL;
8816 8816
8817 8817 /* Update dir attribute, readdir and dnlc caches */
8818 8818 nfs4_update_dircaches(&rm_res->cinfo, dvp, NULL, NULL,
8819 8819 dinfop);
8820 8820
8821 8821 /* destroy rddir cache for dir that was removed */
8822 8822 if (VTOR4(vp)->r_dir != NULL)
8823 8823 nfs4_purge_rddir_cache(vp);
8824 8824 }
8825 8825 }
8826 8826
8827 8827 if (need_end_op)
8828 8828 nfs4_end_op(VTOMI4(dvp), dvp, NULL, &recov_state, needrecov);
8829 8829
8830 8830 nfs_rw_exit(&drp->r_rwlock);
8831 8831
8832 8832 if (resp)
8833 8833 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
8834 8834
8835 8835 if (e.error == 0) {
8836 8836 vnode_t *tvp;
8837 8837 rnode4_t *trp;
8838 8838 trp = VTOR4(vp);
8839 8839 tvp = vp;
8840 8840 if (IS_SHADOW(vp, trp))
8841 8841 tvp = RTOV4(trp);
8842 8842 vnevent_rmdir(tvp, dvp, nm, ct);
8843 8843 }
8844 8844
8845 8845 VN_RELE(vp);
8846 8846
8847 8847 return (e.error);
8848 8848 }
8849 8849
8850 8850 /* ARGSUSED */
8851 8851 static int
8852 8852 nfs4_symlink(vnode_t *dvp, char *lnm, struct vattr *tva, char *tnm, cred_t *cr,
8853 8853 caller_context_t *ct, int flags)
8854 8854 {
8855 8855 int error;
8856 8856 vnode_t *vp;
8857 8857 rnode4_t *rp;
8858 8858 char *contents;
8859 8859 mntinfo4_t *mi = VTOMI4(dvp);
8860 8860
8861 8861 if (nfs_zone() != mi->mi_zone)
8862 8862 return (EPERM);
8863 8863 if (!(mi->mi_flags & MI4_SYMLINK))
8864 8864 return (EOPNOTSUPP);
8865 8865
8866 8866 error = call_nfs4_create_req(dvp, lnm, tnm, tva, &vp, cr, NF4LNK);
8867 8867 if (error)
8868 8868 return (error);
8869 8869
8870 8870 ASSERT(nfs4_consistent_type(vp));
8871 8871 rp = VTOR4(vp);
8872 8872 if (nfs4_do_symlink_cache && rp->r_symlink.contents == NULL) {
8873 8873
8874 8874 contents = kmem_alloc(MAXPATHLEN, KM_SLEEP);
8875 8875
8876 8876 if (contents != NULL) {
8877 8877 mutex_enter(&rp->r_statelock);
8878 8878 if (rp->r_symlink.contents == NULL) {
8879 8879 rp->r_symlink.len = strlen(tnm);
8880 8880 bcopy(tnm, contents, rp->r_symlink.len);
8881 8881 rp->r_symlink.contents = contents;
8882 8882 rp->r_symlink.size = MAXPATHLEN;
8883 8883 mutex_exit(&rp->r_statelock);
8884 8884 } else {
8885 8885 mutex_exit(&rp->r_statelock);
8886 8886 kmem_free((void *)contents, MAXPATHLEN);
8887 8887 }
8888 8888 }
8889 8889 }
8890 8890 VN_RELE(vp);
8891 8891
8892 8892 return (error);
8893 8893 }
8894 8894
8895 8895
8896 8896 /*
8897 8897 * Read directory entries.
8898 8898 * There are some weird things to look out for here. The uio_loffset
8899 8899 * field is either 0 or it is the offset returned from a previous
8900 8900 * readdir. It is an opaque value used by the server to find the
8901 8901 * correct directory block to read. The count field is the number
8902 8902 * of blocks to read on the server. This is advisory only, the server
8903 8903 * may return only one block's worth of entries. Entries may be compressed
8904 8904 * on the server.
8905 8905 */
8906 8906 /* ARGSUSED */
8907 8907 static int
8908 8908 nfs4_readdir(vnode_t *vp, struct uio *uiop, cred_t *cr, int *eofp,
8909 8909 caller_context_t *ct, int flags)
8910 8910 {
8911 8911 int error;
8912 8912 uint_t count;
8913 8913 rnode4_t *rp;
8914 8914 rddir4_cache *rdc;
8915 8915 rddir4_cache *rrdc;
8916 8916
8917 8917 if (nfs_zone() != VTOMI4(vp)->mi_zone)
8918 8918 return (EIO);
8919 8919 rp = VTOR4(vp);
8920 8920
8921 8921 ASSERT(nfs_rw_lock_held(&rp->r_rwlock, RW_READER));
8922 8922
8923 8923 /*
8924 8924 * Make sure that the directory cache is valid.
8925 8925 */
8926 8926 if (rp->r_dir != NULL) {
8927 8927 if (nfs_disable_rddir_cache != 0) {
8928 8928 /*
8929 8929 * Setting nfs_disable_rddir_cache in /etc/system
8930 8930 * allows interoperability with servers that do not
8931 8931 * properly update the attributes of directories.
8932 8932 * Any cached information gets purged before an
8933 8933 * access is made to it.
8934 8934 */
8935 8935 nfs4_purge_rddir_cache(vp);
8936 8936 }
8937 8937
8938 8938 error = nfs4_validate_caches(vp, cr);
8939 8939 if (error)
8940 8940 return (error);
8941 8941 }
8942 8942
8943 8943 count = MIN(uiop->uio_iov->iov_len, MAXBSIZE);
8944 8944
8945 8945 /*
8946 8946 * Short circuit last readdir which always returns 0 bytes.
8947 8947 * This can be done after the directory has been read through
8948 8948 * completely at least once. This will set r_direof which
8949 8949 * can be used to find the value of the last cookie.
8950 8950 */
8951 8951 mutex_enter(&rp->r_statelock);
8952 8952 if (rp->r_direof != NULL &&
8953 8953 uiop->uio_loffset == rp->r_direof->nfs4_ncookie) {
8954 8954 mutex_exit(&rp->r_statelock);
8955 8955 #ifdef DEBUG
8956 8956 nfs4_readdir_cache_shorts++;
8957 8957 #endif
8958 8958 if (eofp)
8959 8959 *eofp = 1;
8960 8960 return (0);
8961 8961 }
8962 8962
8963 8963 /*
8964 8964 * Look for a cache entry. Cache entries are identified
8965 8965 * by the NFS cookie value and the byte count requested.
8966 8966 */
8967 8967 rdc = rddir4_cache_lookup(rp, uiop->uio_loffset, count);
8968 8968
8969 8969 /*
8970 8970 * If rdc is NULL then the lookup resulted in an unrecoverable error.
8971 8971 */
8972 8972 if (rdc == NULL) {
8973 8973 mutex_exit(&rp->r_statelock);
8974 8974 return (EINTR);
8975 8975 }
8976 8976
8977 8977 /*
8978 8978 * Check to see if we need to fill this entry in.
8979 8979 */
8980 8980 if (rdc->flags & RDDIRREQ) {
8981 8981 rdc->flags &= ~RDDIRREQ;
8982 8982 rdc->flags |= RDDIR;
8983 8983 mutex_exit(&rp->r_statelock);
8984 8984
8985 8985 /*
8986 8986 * Do the readdir.
8987 8987 */
8988 8988 nfs4readdir(vp, rdc, cr);
8989 8989
8990 8990 /*
8991 8991 * Reacquire the lock, so that we can continue
8992 8992 */
8993 8993 mutex_enter(&rp->r_statelock);
8994 8994 /*
8995 8995 * The entry is now complete
8996 8996 */
8997 8997 rdc->flags &= ~RDDIR;
8998 8998 }
8999 8999
9000 9000 ASSERT(!(rdc->flags & RDDIR));
9001 9001
9002 9002 /*
9003 9003 * If an error occurred while attempting
9004 9004 * to fill the cache entry, mark the entry invalid and
9005 9005 * just return the error.
9006 9006 */
9007 9007 if (rdc->error) {
9008 9008 error = rdc->error;
9009 9009 rdc->flags |= RDDIRREQ;
9010 9010 rddir4_cache_rele(rp, rdc);
9011 9011 mutex_exit(&rp->r_statelock);
9012 9012 return (error);
9013 9013 }
9014 9014
9015 9015 /*
9016 9016 * The cache entry is complete and good,
9017 9017 * copyout the dirent structs to the calling
9018 9018 * thread.
9019 9019 */
9020 9020 error = uiomove(rdc->entries, rdc->actlen, UIO_READ, uiop);
9021 9021
9022 9022 /*
9023 9023 * If no error occurred during the copyout,
9024 9024 * update the offset in the uio struct to
9025 9025 * contain the value of the next NFS 4 cookie
9026 9026 * and set the eof value appropriately.
9027 9027 */
9028 9028 if (!error) {
9029 9029 uiop->uio_loffset = rdc->nfs4_ncookie;
9030 9030 if (eofp)
9031 9031 *eofp = rdc->eof;
9032 9032 }
9033 9033
9034 9034 /*
9035 9035 * Decide whether to do readahead. Don't if we
9036 9036 * have already read to the end of directory.
9037 9037 */
9038 9038 if (rdc->eof) {
9039 9039 /*
9040 9040 * Make the entry the direof only if it is cached
9041 9041 */
9042 9042 if (rdc->flags & RDDIRCACHED)
9043 9043 rp->r_direof = rdc;
9044 9044 rddir4_cache_rele(rp, rdc);
9045 9045 mutex_exit(&rp->r_statelock);
9046 9046 return (error);
9047 9047 }
9048 9048
9049 9049 /* Determine if a readdir readahead should be done */
9050 9050 if (!(rp->r_flags & R4LOOKUP)) {
9051 9051 rddir4_cache_rele(rp, rdc);
9052 9052 mutex_exit(&rp->r_statelock);
9053 9053 return (error);
9054 9054 }
9055 9055
9056 9056 /*
9057 9057 * Now look for a readahead entry.
9058 9058 *
9059 9059 * Check to see whether we found an entry for the readahead.
9060 9060 * If so, we don't need to do anything further, so free the new
9061 9061 * entry if one was allocated. Otherwise, allocate a new entry, add
9062 9062 * it to the cache, and then initiate an asynchronous readdir
9063 9063 * operation to fill it.
9064 9064 */
9065 9065 rrdc = rddir4_cache_lookup(rp, rdc->nfs4_ncookie, count);
9066 9066
9067 9067 /*
9068 9068 * A readdir cache entry could not be obtained for the readahead. In
9069 9069 * this case we skip the readahead and return.
9070 9070 */
9071 9071 if (rrdc == NULL) {
9072 9072 rddir4_cache_rele(rp, rdc);
9073 9073 mutex_exit(&rp->r_statelock);
9074 9074 return (error);
9075 9075 }
9076 9076
9077 9077 /*
9078 9078 * Check to see if we need to fill this entry in.
9079 9079 */
9080 9080 if (rrdc->flags & RDDIRREQ) {
9081 9081 rrdc->flags &= ~RDDIRREQ;
9082 9082 rrdc->flags |= RDDIR;
9083 9083 rddir4_cache_rele(rp, rdc);
9084 9084 mutex_exit(&rp->r_statelock);
9085 9085 #ifdef DEBUG
9086 9086 nfs4_readdir_readahead++;
9087 9087 #endif
9088 9088 /*
9089 9089 * Do the readdir.
9090 9090 */
9091 9091 nfs4_async_readdir(vp, rrdc, cr, do_nfs4readdir);
9092 9092 return (error);
9093 9093 }
9094 9094
9095 9095 rddir4_cache_rele(rp, rrdc);
9096 9096 rddir4_cache_rele(rp, rdc);
9097 9097 mutex_exit(&rp->r_statelock);
9098 9098 return (error);
9099 9099 }
9100 9100
9101 9101 static int
9102 9102 do_nfs4readdir(vnode_t *vp, rddir4_cache *rdc, cred_t *cr)
9103 9103 {
9104 9104 int error;
9105 9105 rnode4_t *rp;
9106 9106
9107 9107 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
9108 9108
9109 9109 rp = VTOR4(vp);
9110 9110
9111 9111 /*
9112 9112 * Obtain the readdir results for the caller.
9113 9113 */
9114 9114 nfs4readdir(vp, rdc, cr);
9115 9115
9116 9116 mutex_enter(&rp->r_statelock);
9117 9117 /*
9118 9118 * The entry is now complete
9119 9119 */
9120 9120 rdc->flags &= ~RDDIR;
9121 9121
9122 9122 error = rdc->error;
9123 9123 if (error)
9124 9124 rdc->flags |= RDDIRREQ;
9125 9125 rddir4_cache_rele(rp, rdc);
9126 9126 mutex_exit(&rp->r_statelock);
9127 9127
9128 9128 return (error);
9129 9129 }
9130 9130
9131 9131 /*
9132 9132 * Read directory entries.
9133 9133 * There are some weird things to look out for here. The uio_loffset
9134 9134 * field is either 0 or it is the offset returned from a previous
9135 9135 * readdir. It is an opaque value used by the server to find the
9136 9136 * correct directory block to read. The count field is the number
9137 9137 * of blocks to read on the server. This is advisory only, the server
9138 9138 * may return only one block's worth of entries. Entries may be compressed
9139 9139 * on the server.
9140 9140 *
9141 9141 * Generates the following compound request:
9142 9142 * 1. If readdir offset is zero and no dnlc entry for parent exists,
9143 9143 * must include a Lookupp as well. In this case, send:
9144 9144 * { Putfh <fh>; Readdir; Lookupp; Getfh; Getattr }
9145 9145 * 2. Otherwise just do: { Putfh <fh>; Readdir }
9146 9146 *
9147 9147 * Get complete attributes and filehandles for entries if this is the
9148 9148 * first read of the directory. Otherwise, just get fileid's.
9149 9149 */
9150 9150 static void
9151 9151 nfs4readdir(vnode_t *vp, rddir4_cache *rdc, cred_t *cr)
9152 9152 {
9153 9153 COMPOUND4args_clnt args;
9154 9154 COMPOUND4res_clnt res;
9155 9155 READDIR4args *rargs;
9156 9156 READDIR4res_clnt *rd_res;
9157 9157 bitmap4 rd_bitsval;
9158 9158 nfs_argop4 argop[5];
9159 9159 nfs_resop4 *resop;
9160 9160 rnode4_t *rp = VTOR4(vp);
9161 9161 mntinfo4_t *mi = VTOMI4(vp);
9162 9162 int doqueue;
9163 9163 u_longlong_t nodeid, pnodeid; /* id's of dir and its parents */
9164 9164 vnode_t *dvp;
9165 9165 nfs_cookie4 cookie = (nfs_cookie4)rdc->nfs4_cookie;
9166 9166 int num_ops, res_opcnt;
9167 9167 bool_t needrecov = FALSE;
9168 9168 nfs4_recov_state_t recov_state;
9169 9169 hrtime_t t;
9170 9170 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
9171 9171
9172 9172 ASSERT(nfs_zone() == mi->mi_zone);
9173 9173 ASSERT(rdc->flags & RDDIR);
9174 9174 ASSERT(rdc->entries == NULL);
9175 9175
9176 9176 /*
9177 9177 * If rp were a stub, it should have triggered and caused
9178 9178 * a mount for us to get this far.
9179 9179 */
9180 9180 ASSERT(!RP_ISSTUB(rp));
9181 9181
9182 9182 num_ops = 2;
9183 9183 if (cookie == (nfs_cookie4)0 || cookie == (nfs_cookie4)1) {
9184 9184 /*
9185 9185 * Since nfsv4 readdir may not return entries for "." and "..",
9186 9186 * the client must recreate them:
9187 9187 * To find the correct nodeid, do the following:
9188 9188 * For current node, get nodeid from dnlc.
9189 9189 * - if current node is rootvp, set pnodeid to nodeid.
9190 9190 * - else if parent is in the dnlc, get its nodeid from there.
9191 9191 * - else add LOOKUPP+GETATTR to compound.
9192 9192 */
9193 9193 nodeid = rp->r_attr.va_nodeid;
9194 9194 if (vp->v_flag & VROOT) {
9195 9195 pnodeid = nodeid; /* root of mount point */
9196 9196 } else {
9197 9197 dvp = dnlc_lookup(vp, "..");
9198 9198 if (dvp != NULL && dvp != DNLC_NO_VNODE) {
9199 9199 /* parent in dnlc cache - no need for otw */
9200 9200 pnodeid = VTOR4(dvp)->r_attr.va_nodeid;
9201 9201 } else {
9202 9202 /*
9203 9203 * parent not in dnlc cache,
9204 9204 * do lookupp to get its id
9205 9205 */
9206 9206 num_ops = 5;
9207 9207 pnodeid = 0; /* set later by getattr parent */
9208 9208 }
9209 9209 if (dvp)
9210 9210 VN_RELE(dvp);
9211 9211 }
9212 9212 }
9213 9213 recov_state.rs_flags = 0;
9214 9214 recov_state.rs_num_retry_despite_err = 0;
9215 9215
9216 9216 /* Save the original mount point security flavor */
9217 9217 (void) save_mnt_secinfo(mi->mi_curr_serv);
9218 9218
9219 9219 recov_retry:
9220 9220 args.ctag = TAG_READDIR;
9221 9221
9222 9222 args.array = argop;
9223 9223 args.array_len = num_ops;
9224 9224
9225 9225 if (e.error = nfs4_start_fop(VTOMI4(vp), vp, NULL, OH_READDIR,
9226 9226 &recov_state, NULL)) {
9227 9227 /*
9228 9228 * If readdir a node that is a stub for a crossed mount point,
9229 9229 * keep the original secinfo flavor for the current file
9230 9230 * system, not the crossed one.
9231 9231 */
9232 9232 (void) check_mnt_secinfo(mi->mi_curr_serv, vp);
9233 9233 rdc->error = e.error;
9234 9234 return;
9235 9235 }
9236 9236
9237 9237 /*
9238 9238 * Determine which attrs to request for dirents. This code
9239 9239 * must be protected by nfs4_start/end_fop because of r_server
9240 9240 * (which will change during failover recovery).
9241 9241 *
9242 9242 */
9243 9243 if (rp->r_flags & (R4LOOKUP | R4READDIRWATTR)) {
9244 9244 /*
9245 9245 * Get all vattr attrs plus filehandle and rdattr_error
9246 9246 */
9247 9247 rd_bitsval = NFS4_VATTR_MASK |
9248 9248 FATTR4_RDATTR_ERROR_MASK |
9249 9249 FATTR4_FILEHANDLE_MASK;
9250 9250
9251 9251 if (rp->r_flags & R4READDIRWATTR) {
9252 9252 mutex_enter(&rp->r_statelock);
9253 9253 rp->r_flags &= ~R4READDIRWATTR;
9254 9254 mutex_exit(&rp->r_statelock);
9255 9255 }
9256 9256 } else {
9257 9257 servinfo4_t *svp = rp->r_server;
9258 9258
9259 9259 /*
9260 9260 * Already read directory. Use readdir with
9261 9261 * no attrs (except for mounted_on_fileid) for updates.
9262 9262 */
9263 9263 rd_bitsval = FATTR4_RDATTR_ERROR_MASK;
9264 9264
9265 9265 /*
9266 9266 * request mounted on fileid if supported, else request
9267 9267 * fileid. maybe we should verify that fileid is supported
9268 9268 * and request something else if not.
9269 9269 */
9270 9270 (void) nfs_rw_enter_sig(&svp->sv_lock, RW_READER, 0);
9271 9271 if (svp->sv_supp_attrs & FATTR4_MOUNTED_ON_FILEID_MASK)
9272 9272 rd_bitsval |= FATTR4_MOUNTED_ON_FILEID_MASK;
9273 9273 nfs_rw_exit(&svp->sv_lock);
9274 9274 }
9275 9275
9276 9276 /* putfh directory fh */
9277 9277 argop[0].argop = OP_CPUTFH;
9278 9278 argop[0].nfs_argop4_u.opcputfh.sfh = rp->r_fh;
9279 9279
9280 9280 argop[1].argop = OP_READDIR;
9281 9281 rargs = &argop[1].nfs_argop4_u.opreaddir;
9282 9282 /*
9283 9283 * 1 and 2 are reserved for client "." and ".." entry offset.
9284 9284 * cookie 0 should be used over-the-wire to start reading at
9285 9285 * the beginning of the directory excluding "." and "..".
9286 9286 */
9287 9287 if (rdc->nfs4_cookie == 0 ||
9288 9288 rdc->nfs4_cookie == 1 ||
9289 9289 rdc->nfs4_cookie == 2) {
9290 9290 rargs->cookie = (nfs_cookie4)0;
9291 9291 rargs->cookieverf = 0;
9292 9292 } else {
9293 9293 rargs->cookie = (nfs_cookie4)rdc->nfs4_cookie;
9294 9294 mutex_enter(&rp->r_statelock);
9295 9295 rargs->cookieverf = rp->r_cookieverf4;
9296 9296 mutex_exit(&rp->r_statelock);
9297 9297 }
9298 9298 rargs->dircount = MIN(rdc->buflen, mi->mi_tsize);
9299 9299 rargs->maxcount = mi->mi_tsize;
9300 9300 rargs->attr_request = rd_bitsval;
9301 9301 rargs->rdc = rdc;
9302 9302 rargs->dvp = vp;
9303 9303 rargs->mi = mi;
9304 9304 rargs->cr = cr;
9305 9305
9306 9306
9307 9307 /*
9308 9308 * If count < than the minimum required, we return no entries
9309 9309 * and fail with EINVAL
9310 9310 */
9311 9311 if (rargs->dircount < (DIRENT64_RECLEN(1) + DIRENT64_RECLEN(2))) {
9312 9312 rdc->error = EINVAL;
9313 9313 goto out;
9314 9314 }
9315 9315
9316 9316 if (args.array_len == 5) {
9317 9317 /*
9318 9318 * Add lookupp and getattr for parent nodeid.
9319 9319 */
9320 9320 argop[2].argop = OP_LOOKUPP;
9321 9321
9322 9322 argop[3].argop = OP_GETFH;
9323 9323
9324 9324 /* getattr parent */
9325 9325 argop[4].argop = OP_GETATTR;
9326 9326 argop[4].nfs_argop4_u.opgetattr.attr_request = NFS4_VATTR_MASK;
9327 9327 argop[4].nfs_argop4_u.opgetattr.mi = mi;
9328 9328 }
9329 9329
9330 9330 doqueue = 1;
9331 9331
9332 9332 if (mi->mi_io_kstats) {
9333 9333 mutex_enter(&mi->mi_lock);
9334 9334 kstat_runq_enter(KSTAT_IO_PTR(mi->mi_io_kstats));
9335 9335 mutex_exit(&mi->mi_lock);
9336 9336 }
9337 9337
9338 9338 /* capture the time of this call */
9339 9339 rargs->t = t = gethrtime();
9340 9340
9341 9341 rfs4call(mi, &args, &res, cr, &doqueue, 0, &e);
9342 9342
9343 9343 if (mi->mi_io_kstats) {
9344 9344 mutex_enter(&mi->mi_lock);
9345 9345 kstat_runq_exit(KSTAT_IO_PTR(mi->mi_io_kstats));
9346 9346 mutex_exit(&mi->mi_lock);
9347 9347 }
9348 9348
9349 9349 needrecov = nfs4_needs_recovery(&e, FALSE, mi->mi_vfsp);
9350 9350
9351 9351 /*
9352 9352 * If RPC error occurred and it isn't an error that
9353 9353 * triggers recovery, then go ahead and fail now.
9354 9354 */
9355 9355 if (e.error != 0 && !needrecov) {
9356 9356 rdc->error = e.error;
9357 9357 goto out;
9358 9358 }
9359 9359
9360 9360 if (needrecov) {
9361 9361 bool_t abort;
9362 9362
9363 9363 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
9364 9364 "nfs4readdir: initiating recovery.\n"));
9365 9365
9366 9366 abort = nfs4_start_recovery(&e, VTOMI4(vp), vp, NULL, NULL,
9367 9367 NULL, OP_READDIR, NULL, NULL, NULL);
9368 9368 if (abort == FALSE) {
9369 9369 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_READDIR,
9370 9370 &recov_state, needrecov);
9371 9371 if (!e.error)
9372 9372 (void) xdr_free(xdr_COMPOUND4res_clnt,
9373 9373 (caddr_t)&res);
9374 9374 if (rdc->entries != NULL) {
9375 9375 kmem_free(rdc->entries, rdc->entlen);
9376 9376 rdc->entries = NULL;
9377 9377 }
9378 9378 goto recov_retry;
9379 9379 }
9380 9380
9381 9381 if (e.error != 0) {
9382 9382 rdc->error = e.error;
9383 9383 goto out;
9384 9384 }
9385 9385
9386 9386 /* fall through for res.status case */
9387 9387 }
9388 9388
9389 9389 res_opcnt = res.array_len;
9390 9390
9391 9391 /*
9392 9392 * If compound failed first 2 ops (PUTFH+READDIR), then return
9393 9393 * failure here. Subsequent ops are for filling out dot-dot
9394 9394 * dirent, and if they fail, we still want to give the caller
9395 9395 * the dirents returned by (the successful) READDIR op, so we need
9396 9396 * to silently ignore failure for subsequent ops (LOOKUPP+GETATTR).
9397 9397 *
9398 9398 * One example where PUTFH+READDIR ops would succeed but
9399 9399 * LOOKUPP+GETATTR would fail would be a dir that has r perm
9400 9400 * but lacks x. In this case, a POSIX server's VOP_READDIR
9401 9401 * would succeed; however, VOP_LOOKUP(..) would fail since no
9402 9402 * x perm. We need to come up with a non-vendor-specific way
9403 9403 * for a POSIX server to return d_ino from dotdot's dirent if
9404 9404 * client only requests mounted_on_fileid, and just say the
9405 9405 * LOOKUPP succeeded and fill out the GETATTR. However, if
9406 9406 * client requested any mandatory attrs, server would be required
9407 9407 * to fail the GETATTR op because it can't call VOP_LOOKUP+VOP_GETATTR
9408 9408 * for dotdot.
9409 9409 */
9410 9410
9411 9411 if (res.status) {
9412 9412 if (res_opcnt <= 2) {
9413 9413 e.error = geterrno4(res.status);
9414 9414 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_READDIR,
9415 9415 &recov_state, needrecov);
9416 9416 nfs4_purge_stale_fh(e.error, vp, cr);
9417 9417 rdc->error = e.error;
9418 9418 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
9419 9419 if (rdc->entries != NULL) {
9420 9420 kmem_free(rdc->entries, rdc->entlen);
9421 9421 rdc->entries = NULL;
9422 9422 }
9423 9423 /*
9424 9424 * If readdir a node that is a stub for a
9425 9425 * crossed mount point, keep the original
9426 9426 * secinfo flavor for the current file system,
9427 9427 * not the crossed one.
9428 9428 */
9429 9429 (void) check_mnt_secinfo(mi->mi_curr_serv, vp);
9430 9430 return;
9431 9431 }
9432 9432 }
9433 9433
9434 9434 resop = &res.array[1]; /* readdir res */
9435 9435 rd_res = &resop->nfs_resop4_u.opreaddirclnt;
9436 9436
9437 9437 mutex_enter(&rp->r_statelock);
9438 9438 rp->r_cookieverf4 = rd_res->cookieverf;
9439 9439 mutex_exit(&rp->r_statelock);
9440 9440
9441 9441 /*
9442 9442 * For "." and ".." entries
9443 9443 * e.g.
9444 9444 * seek(cookie=0) -> "." entry with d_off = 1
9445 9445 * seek(cookie=1) -> ".." entry with d_off = 2
9446 9446 */
9447 9447 if (cookie == (nfs_cookie4) 0) {
9448 9448 if (rd_res->dotp)
9449 9449 rd_res->dotp->d_ino = nodeid;
9450 9450 if (rd_res->dotdotp)
9451 9451 rd_res->dotdotp->d_ino = pnodeid;
9452 9452 }
9453 9453 if (cookie == (nfs_cookie4) 1) {
9454 9454 if (rd_res->dotdotp)
9455 9455 rd_res->dotdotp->d_ino = pnodeid;
9456 9456 }
9457 9457
9458 9458
9459 9459 /* LOOKUPP+GETATTR attemped */
9460 9460 if (args.array_len == 5 && rd_res->dotdotp) {
9461 9461 if (res.status == NFS4_OK && res_opcnt == 5) {
9462 9462 nfs_fh4 *fhp;
9463 9463 nfs4_sharedfh_t *sfhp;
9464 9464 vnode_t *pvp;
9465 9465 nfs4_ga_res_t *garp;
9466 9466
9467 9467 resop++; /* lookupp */
9468 9468 resop++; /* getfh */
9469 9469 fhp = &resop->nfs_resop4_u.opgetfh.object;
9470 9470
9471 9471 resop++; /* getattr of parent */
9472 9472
9473 9473 /*
9474 9474 * First, take care of finishing the
9475 9475 * readdir results.
9476 9476 */
9477 9477 garp = &resop->nfs_resop4_u.opgetattr.ga_res;
9478 9478 /*
9479 9479 * The d_ino of .. must be the inode number
9480 9480 * of the mounted filesystem.
9481 9481 */
9482 9482 if (garp->n4g_va.va_mask & AT_NODEID)
9483 9483 rd_res->dotdotp->d_ino =
9484 9484 garp->n4g_va.va_nodeid;
9485 9485
9486 9486
9487 9487 /*
9488 9488 * Next, create the ".." dnlc entry
9489 9489 */
9490 9490 sfhp = sfh4_get(fhp, mi);
9491 9491 if (!nfs4_make_dotdot(sfhp, t, vp, cr, &pvp, 0)) {
9492 9492 dnlc_update(vp, "..", pvp);
9493 9493 VN_RELE(pvp);
9494 9494 }
9495 9495 sfh4_rele(&sfhp);
9496 9496 }
9497 9497 }
9498 9498
9499 9499 if (mi->mi_io_kstats) {
9500 9500 mutex_enter(&mi->mi_lock);
9501 9501 KSTAT_IO_PTR(mi->mi_io_kstats)->reads++;
9502 9502 KSTAT_IO_PTR(mi->mi_io_kstats)->nread += rdc->actlen;
9503 9503 mutex_exit(&mi->mi_lock);
9504 9504 }
9505 9505
9506 9506 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
9507 9507
9508 9508 out:
9509 9509 /*
9510 9510 * If readdir a node that is a stub for a crossed mount point,
9511 9511 * keep the original secinfo flavor for the current file system,
9512 9512 * not the crossed one.
9513 9513 */
9514 9514 (void) check_mnt_secinfo(mi->mi_curr_serv, vp);
9515 9515
9516 9516 nfs4_end_fop(mi, vp, NULL, OH_READDIR, &recov_state, needrecov);
9517 9517 }
9518 9518
9519 9519
9520 9520 static int
9521 9521 nfs4_bio(struct buf *bp, stable_how4 *stab_comm, cred_t *cr, bool_t readahead)
9522 9522 {
9523 9523 rnode4_t *rp = VTOR4(bp->b_vp);
9524 9524 int count;
9525 9525 int error;
9526 9526 cred_t *cred_otw = NULL;
9527 9527 offset_t offset;
9528 9528 nfs4_open_stream_t *osp = NULL;
9529 9529 bool_t first_time = TRUE; /* first time getting otw cred */
9530 9530 bool_t last_time = FALSE; /* last time getting otw cred */
9531 9531
9532 9532 ASSERT(nfs_zone() == VTOMI4(bp->b_vp)->mi_zone);
9533 9533
9534 9534 DTRACE_IO1(start, struct buf *, bp);
9535 9535 offset = ldbtob(bp->b_lblkno);
9536 9536
9537 9537 if (bp->b_flags & B_READ) {
9538 9538 read_again:
9539 9539 /*
9540 9540 * Releases the osp, if it is provided.
9541 9541 * Puts a hold on the cred_otw and the new osp (if found).
9542 9542 */
9543 9543 cred_otw = nfs4_get_otw_cred_by_osp(rp, cr, &osp,
9544 9544 &first_time, &last_time);
9545 9545 error = bp->b_error = nfs4read(bp->b_vp, bp->b_un.b_addr,
9546 9546 offset, bp->b_bcount, &bp->b_resid, cred_otw,
9547 9547 readahead, NULL);
9548 9548 crfree(cred_otw);
9549 9549 if (!error) {
9550 9550 if (bp->b_resid) {
9551 9551 /*
9552 9552 * Didn't get it all because we hit EOF,
9553 9553 * zero all the memory beyond the EOF.
9554 9554 */
9555 9555 /* bzero(rdaddr + */
9556 9556 bzero(bp->b_un.b_addr +
9557 9557 bp->b_bcount - bp->b_resid, bp->b_resid);
9558 9558 }
9559 9559 mutex_enter(&rp->r_statelock);
9560 9560 if (bp->b_resid == bp->b_bcount &&
9561 9561 offset >= rp->r_size) {
9562 9562 /*
9563 9563 * We didn't read anything at all as we are
9564 9564 * past EOF. Return an error indicator back
9565 9565 * but don't destroy the pages (yet).
9566 9566 */
9567 9567 error = NFS_EOF;
9568 9568 }
9569 9569 mutex_exit(&rp->r_statelock);
9570 9570 } else if (error == EACCES && last_time == FALSE) {
9571 9571 goto read_again;
9572 9572 }
9573 9573 } else {
9574 9574 if (!(rp->r_flags & R4STALE)) {
9575 9575 write_again:
9576 9576 /*
9577 9577 * Releases the osp, if it is provided.
9578 9578 * Puts a hold on the cred_otw and the new
9579 9579 * osp (if found).
9580 9580 */
9581 9581 cred_otw = nfs4_get_otw_cred_by_osp(rp, cr, &osp,
9582 9582 &first_time, &last_time);
9583 9583 mutex_enter(&rp->r_statelock);
9584 9584 count = MIN(bp->b_bcount, rp->r_size - offset);
9585 9585 mutex_exit(&rp->r_statelock);
9586 9586 if (count < 0)
9587 9587 cmn_err(CE_PANIC, "nfs4_bio: write count < 0");
9588 9588 #ifdef DEBUG
9589 9589 if (count == 0) {
9590 9590 zoneid_t zoneid = getzoneid();
9591 9591
9592 9592 zcmn_err(zoneid, CE_WARN,
9593 9593 "nfs4_bio: zero length write at %lld",
9594 9594 offset);
9595 9595 zcmn_err(zoneid, CE_CONT, "flags=0x%x, "
9596 9596 "b_bcount=%ld, file size=%lld",
9597 9597 rp->r_flags, (long)bp->b_bcount,
9598 9598 rp->r_size);
9599 9599 sfh4_printfhandle(VTOR4(bp->b_vp)->r_fh);
9600 9600 if (nfs4_bio_do_stop)
9601 9601 debug_enter("nfs4_bio");
9602 9602 }
9603 9603 #endif
9604 9604 error = nfs4write(bp->b_vp, bp->b_un.b_addr, offset,
9605 9605 count, cred_otw, stab_comm);
9606 9606 if (error == EACCES && last_time == FALSE) {
9607 9607 crfree(cred_otw);
9608 9608 goto write_again;
9609 9609 }
9610 9610 bp->b_error = error;
9611 9611 if (error && error != EINTR &&
9612 9612 !(bp->b_vp->v_vfsp->vfs_flag & VFS_UNMOUNTED)) {
9613 9613 /*
9614 9614 * Don't print EDQUOT errors on the console.
9615 9615 * Don't print asynchronous EACCES errors.
9616 9616 * Don't print EFBIG errors.
9617 9617 * Print all other write errors.
9618 9618 */
9619 9619 if (error != EDQUOT && error != EFBIG &&
9620 9620 (error != EACCES ||
9621 9621 !(bp->b_flags & B_ASYNC)))
9622 9622 nfs4_write_error(bp->b_vp,
9623 9623 error, cred_otw);
9624 9624 /*
9625 9625 * Update r_error and r_flags as appropriate.
9626 9626 * If the error was ESTALE, then mark the
9627 9627 * rnode as not being writeable and save
9628 9628 * the error status. Otherwise, save any
9629 9629 * errors which occur from asynchronous
9630 9630 * page invalidations. Any errors occurring
9631 9631 * from other operations should be saved
9632 9632 * by the caller.
9633 9633 */
9634 9634 mutex_enter(&rp->r_statelock);
9635 9635 if (error == ESTALE) {
9636 9636 rp->r_flags |= R4STALE;
9637 9637 if (!rp->r_error)
9638 9638 rp->r_error = error;
9639 9639 } else if (!rp->r_error &&
9640 9640 (bp->b_flags &
9641 9641 (B_INVAL|B_FORCE|B_ASYNC)) ==
9642 9642 (B_INVAL|B_FORCE|B_ASYNC)) {
9643 9643 rp->r_error = error;
9644 9644 }
9645 9645 mutex_exit(&rp->r_statelock);
9646 9646 }
9647 9647 crfree(cred_otw);
9648 9648 } else {
9649 9649 error = rp->r_error;
9650 9650 /*
9651 9651 * A close may have cleared r_error, if so,
9652 9652 * propagate ESTALE error return properly
9653 9653 */
9654 9654 if (error == 0)
9655 9655 error = ESTALE;
9656 9656 }
9657 9657 }
9658 9658
9659 9659 if (error != 0 && error != NFS_EOF)
9660 9660 bp->b_flags |= B_ERROR;
9661 9661
9662 9662 if (osp)
9663 9663 open_stream_rele(osp, rp);
9664 9664
9665 9665 DTRACE_IO1(done, struct buf *, bp);
9666 9666
9667 9667 return (error);
9668 9668 }
9669 9669
9670 9670 /* ARGSUSED */
9671 9671 int
9672 9672 nfs4_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
9673 9673 {
9674 9674 return (EREMOTE);
9675 9675 }
9676 9676
9677 9677 /* ARGSUSED2 */
9678 9678 int
9679 9679 nfs4_rwlock(vnode_t *vp, int write_lock, caller_context_t *ctp)
9680 9680 {
9681 9681 rnode4_t *rp = VTOR4(vp);
9682 9682
9683 9683 if (!write_lock) {
9684 9684 (void) nfs_rw_enter_sig(&rp->r_rwlock, RW_READER, FALSE);
9685 9685 return (V_WRITELOCK_FALSE);
9686 9686 }
9687 9687
9688 9688 if ((rp->r_flags & R4DIRECTIO) ||
9689 9689 (VTOMI4(vp)->mi_flags & MI4_DIRECTIO)) {
9690 9690 (void) nfs_rw_enter_sig(&rp->r_rwlock, RW_READER, FALSE);
9691 9691 if (rp->r_mapcnt == 0 && !nfs4_has_pages(vp))
9692 9692 return (V_WRITELOCK_FALSE);
9693 9693 nfs_rw_exit(&rp->r_rwlock);
9694 9694 }
9695 9695
9696 9696 (void) nfs_rw_enter_sig(&rp->r_rwlock, RW_WRITER, FALSE);
9697 9697 return (V_WRITELOCK_TRUE);
9698 9698 }
9699 9699
9700 9700 /* ARGSUSED */
9701 9701 void
9702 9702 nfs4_rwunlock(vnode_t *vp, int write_lock, caller_context_t *ctp)
9703 9703 {
9704 9704 rnode4_t *rp = VTOR4(vp);
9705 9705
9706 9706 nfs_rw_exit(&rp->r_rwlock);
9707 9707 }
9708 9708
9709 9709 /* ARGSUSED */
9710 9710 static int
9711 9711 nfs4_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, caller_context_t *ct)
9712 9712 {
9713 9713 if (nfs_zone() != VTOMI4(vp)->mi_zone)
9714 9714 return (EIO);
9715 9715
9716 9716 /*
9717 9717 * Because we stuff the readdir cookie into the offset field
9718 9718 * someone may attempt to do an lseek with the cookie which
9719 9719 * we want to succeed.
9720 9720 */
9721 9721 if (vp->v_type == VDIR)
9722 9722 return (0);
9723 9723 if (*noffp < 0)
9724 9724 return (EINVAL);
9725 9725 return (0);
9726 9726 }
9727 9727
9728 9728
9729 9729 /*
9730 9730 * Return all the pages from [off..off+len) in file
9731 9731 */
9732 9732 /* ARGSUSED */
9733 9733 static int
9734 9734 nfs4_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp,
9735 9735 page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr,
9736 9736 enum seg_rw rw, cred_t *cr, caller_context_t *ct)
9737 9737 {
9738 9738 rnode4_t *rp;
9739 9739 int error;
9740 9740 mntinfo4_t *mi;
9741 9741
9742 9742 if (nfs_zone() != VTOMI4(vp)->mi_zone)
9743 9743 return (EIO);
9744 9744 rp = VTOR4(vp);
9745 9745 if (IS_SHADOW(vp, rp))
9746 9746 vp = RTOV4(rp);
9747 9747
9748 9748 if (vp->v_flag & VNOMAP)
9749 9749 return (ENOSYS);
9750 9750
9751 9751 if (protp != NULL)
9752 9752 *protp = PROT_ALL;
9753 9753
9754 9754 /*
9755 9755 * Now validate that the caches are up to date.
9756 9756 */
9757 9757 if (error = nfs4_validate_caches(vp, cr))
9758 9758 return (error);
9759 9759
9760 9760 mi = VTOMI4(vp);
9761 9761 retry:
9762 9762 mutex_enter(&rp->r_statelock);
9763 9763
9764 9764 /*
9765 9765 * Don't create dirty pages faster than they
9766 9766 * can be cleaned so that the system doesn't
9767 9767 * get imbalanced. If the async queue is
9768 9768 * maxed out, then wait for it to drain before
9769 9769 * creating more dirty pages. Also, wait for
9770 9770 * any threads doing pagewalks in the vop_getattr
9771 9771 * entry points so that they don't block for
9772 9772 * long periods.
9773 9773 */
9774 9774 if (rw == S_CREATE) {
9775 9775 while ((mi->mi_max_threads != 0 &&
9776 9776 rp->r_awcount > 2 * mi->mi_max_threads) ||
9777 9777 rp->r_gcount > 0)
9778 9778 cv_wait(&rp->r_cv, &rp->r_statelock);
9779 9779 }
9780 9780
9781 9781 /*
9782 9782 * If we are getting called as a side effect of an nfs_write()
9783 9783 * operation the local file size might not be extended yet.
9784 9784 * In this case we want to be able to return pages of zeroes.
9785 9785 */
9786 9786 if (off + len > rp->r_size + PAGEOFFSET && seg != segkmap) {
9787 9787 NFS4_DEBUG(nfs4_pageio_debug,
9788 9788 (CE_NOTE, "getpage beyond EOF: off=%lld, "
9789 9789 "len=%llu, size=%llu, attrsize =%llu", off,
9790 9790 (u_longlong_t)len, rp->r_size, rp->r_attr.va_size));
9791 9791 mutex_exit(&rp->r_statelock);
9792 9792 return (EFAULT); /* beyond EOF */
9793 9793 }
9794 9794
9795 9795 mutex_exit(&rp->r_statelock);
9796 9796
9797 9797 error = pvn_getpages(nfs4_getapage, vp, off, len, protp,
9798 9798 pl, plsz, seg, addr, rw, cr);
9799 9799 NFS4_DEBUG(nfs4_pageio_debug && error,
9800 9800 (CE_NOTE, "getpages error %d; off=%lld, len=%lld",
9801 9801 error, off, (u_longlong_t)len));
9802 9802
9803 9803 switch (error) {
9804 9804 case NFS_EOF:
9805 9805 nfs4_purge_caches(vp, NFS4_NOPURGE_DNLC, cr, FALSE);
9806 9806 goto retry;
9807 9807 case ESTALE:
9808 9808 nfs4_purge_stale_fh(error, vp, cr);
9809 9809 }
9810 9810
9811 9811 return (error);
9812 9812 }
9813 9813
9814 9814 /*
9815 9815 * Called from pvn_getpages to get a particular page.
9816 9816 */
9817 9817 /* ARGSUSED */
9818 9818 static int
9819 9819 nfs4_getapage(vnode_t *vp, u_offset_t off, size_t len, uint_t *protp,
9820 9820 page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr,
9821 9821 enum seg_rw rw, cred_t *cr)
9822 9822 {
9823 9823 rnode4_t *rp;
9824 9824 uint_t bsize;
9825 9825 struct buf *bp;
9826 9826 page_t *pp;
9827 9827 u_offset_t lbn;
9828 9828 u_offset_t io_off;
9829 9829 u_offset_t blkoff;
9830 9830 u_offset_t rablkoff;
9831 9831 size_t io_len;
9832 9832 uint_t blksize;
9833 9833 int error;
9834 9834 int readahead;
9835 9835 int readahead_issued = 0;
9836 9836 int ra_window; /* readahead window */
9837 9837 page_t *pagefound;
9838 9838 page_t *savepp;
9839 9839
9840 9840 if (nfs_zone() != VTOMI4(vp)->mi_zone)
9841 9841 return (EIO);
9842 9842
9843 9843 rp = VTOR4(vp);
9844 9844 ASSERT(!IS_SHADOW(vp, rp));
9845 9845 bsize = MAX(vp->v_vfsp->vfs_bsize, PAGESIZE);
9846 9846
9847 9847 reread:
9848 9848 bp = NULL;
9849 9849 pp = NULL;
9850 9850 pagefound = NULL;
9851 9851
9852 9852 if (pl != NULL)
9853 9853 pl[0] = NULL;
9854 9854
9855 9855 error = 0;
9856 9856 lbn = off / bsize;
9857 9857 blkoff = lbn * bsize;
9858 9858
9859 9859 /*
9860 9860 * Queueing up the readahead before doing the synchronous read
9861 9861 * results in a significant increase in read throughput because
9862 9862 * of the increased parallelism between the async threads and
9863 9863 * the process context.
9864 9864 */
9865 9865 if ((off & ((vp->v_vfsp->vfs_bsize) - 1)) == 0 &&
9866 9866 rw != S_CREATE &&
9867 9867 !(vp->v_flag & VNOCACHE)) {
9868 9868 mutex_enter(&rp->r_statelock);
9869 9869
9870 9870 /*
9871 9871 * Calculate the number of readaheads to do.
9872 9872 * a) No readaheads at offset = 0.
9873 9873 * b) Do maximum(nfs4_nra) readaheads when the readahead
9874 9874 * window is closed.
9875 9875 * c) Do readaheads between 1 to (nfs4_nra - 1) depending
9876 9876 * upon how far the readahead window is open or close.
9877 9877 * d) No readaheads if rp->r_nextr is not within the scope
9878 9878 * of the readahead window (random i/o).
9879 9879 */
9880 9880
9881 9881 if (off == 0)
9882 9882 readahead = 0;
9883 9883 else if (blkoff == rp->r_nextr)
9884 9884 readahead = nfs4_nra;
9885 9885 else if (rp->r_nextr > blkoff &&
9886 9886 ((ra_window = (rp->r_nextr - blkoff) / bsize)
9887 9887 <= (nfs4_nra - 1)))
9888 9888 readahead = nfs4_nra - ra_window;
9889 9889 else
9890 9890 readahead = 0;
9891 9891
9892 9892 rablkoff = rp->r_nextr;
9893 9893 while (readahead > 0 && rablkoff + bsize < rp->r_size) {
9894 9894 mutex_exit(&rp->r_statelock);
9895 9895 if (nfs4_async_readahead(vp, rablkoff + bsize,
9896 9896 addr + (rablkoff + bsize - off),
9897 9897 seg, cr, nfs4_readahead) < 0) {
9898 9898 mutex_enter(&rp->r_statelock);
9899 9899 break;
9900 9900 }
9901 9901 readahead--;
9902 9902 rablkoff += bsize;
9903 9903 /*
9904 9904 * Indicate that we did a readahead so
9905 9905 * readahead offset is not updated
9906 9906 * by the synchronous read below.
9907 9907 */
9908 9908 readahead_issued = 1;
9909 9909 mutex_enter(&rp->r_statelock);
9910 9910 /*
9911 9911 * set readahead offset to
9912 9912 * offset of last async readahead
9913 9913 * request.
9914 9914 */
9915 9915 rp->r_nextr = rablkoff;
9916 9916 }
9917 9917 mutex_exit(&rp->r_statelock);
9918 9918 }
9919 9919
9920 9920 again:
9921 9921 if ((pagefound = page_exists(vp, off)) == NULL) {
9922 9922 if (pl == NULL) {
9923 9923 (void) nfs4_async_readahead(vp, blkoff, addr, seg, cr,
9924 9924 nfs4_readahead);
9925 9925 } else if (rw == S_CREATE) {
9926 9926 /*
9927 9927 * Block for this page is not allocated, or the offset
9928 9928 * is beyond the current allocation size, or we're
9929 9929 * allocating a swap slot and the page was not found,
9930 9930 * so allocate it and return a zero page.
9931 9931 */
9932 9932 if ((pp = page_create_va(vp, off,
9933 9933 PAGESIZE, PG_WAIT, seg, addr)) == NULL)
9934 9934 cmn_err(CE_PANIC, "nfs4_getapage: page_create");
9935 9935 io_len = PAGESIZE;
9936 9936 mutex_enter(&rp->r_statelock);
9937 9937 rp->r_nextr = off + PAGESIZE;
9938 9938 mutex_exit(&rp->r_statelock);
9939 9939 } else {
9940 9940 /*
9941 9941 * Need to go to server to get a block
9942 9942 */
9943 9943 mutex_enter(&rp->r_statelock);
9944 9944 if (blkoff < rp->r_size &&
9945 9945 blkoff + bsize > rp->r_size) {
9946 9946 /*
9947 9947 * If less than a block left in
9948 9948 * file read less than a block.
9949 9949 */
9950 9950 if (rp->r_size <= off) {
9951 9951 /*
9952 9952 * Trying to access beyond EOF,
9953 9953 * set up to get at least one page.
9954 9954 */
9955 9955 blksize = off + PAGESIZE - blkoff;
9956 9956 } else
9957 9957 blksize = rp->r_size - blkoff;
9958 9958 } else if ((off == 0) ||
9959 9959 (off != rp->r_nextr && !readahead_issued)) {
9960 9960 blksize = PAGESIZE;
9961 9961 blkoff = off; /* block = page here */
9962 9962 } else
9963 9963 blksize = bsize;
9964 9964 mutex_exit(&rp->r_statelock);
9965 9965
9966 9966 pp = pvn_read_kluster(vp, off, seg, addr, &io_off,
9967 9967 &io_len, blkoff, blksize, 0);
9968 9968
9969 9969 /*
9970 9970 * Some other thread has entered the page,
9971 9971 * so just use it.
9972 9972 */
9973 9973 if (pp == NULL)
9974 9974 goto again;
9975 9975
9976 9976 /*
9977 9977 * Now round the request size up to page boundaries.
9978 9978 * This ensures that the entire page will be
9979 9979 * initialized to zeroes if EOF is encountered.
9980 9980 */
9981 9981 io_len = ptob(btopr(io_len));
9982 9982
9983 9983 bp = pageio_setup(pp, io_len, vp, B_READ);
9984 9984 ASSERT(bp != NULL);
9985 9985
9986 9986 /*
9987 9987 * pageio_setup should have set b_addr to 0. This
9988 9988 * is correct since we want to do I/O on a page
9989 9989 * boundary. bp_mapin will use this addr to calculate
9990 9990 * an offset, and then set b_addr to the kernel virtual
9991 9991 * address it allocated for us.
9992 9992 */
9993 9993 ASSERT(bp->b_un.b_addr == 0);
9994 9994
9995 9995 bp->b_edev = 0;
9996 9996 bp->b_dev = 0;
9997 9997 bp->b_lblkno = lbtodb(io_off);
9998 9998 bp->b_file = vp;
9999 9999 bp->b_offset = (offset_t)off;
10000 10000 bp_mapin(bp);
10001 10001
10002 10002 /*
10003 10003 * If doing a write beyond what we believe is EOF,
10004 10004 * don't bother trying to read the pages from the
10005 10005 * server, we'll just zero the pages here. We
10006 10006 * don't check that the rw flag is S_WRITE here
10007 10007 * because some implementations may attempt a
10008 10008 * read access to the buffer before copying data.
10009 10009 */
10010 10010 mutex_enter(&rp->r_statelock);
10011 10011 if (io_off >= rp->r_size && seg == segkmap) {
10012 10012 mutex_exit(&rp->r_statelock);
10013 10013 bzero(bp->b_un.b_addr, io_len);
10014 10014 } else {
10015 10015 mutex_exit(&rp->r_statelock);
10016 10016 error = nfs4_bio(bp, NULL, cr, FALSE);
10017 10017 }
10018 10018
10019 10019 /*
10020 10020 * Unmap the buffer before freeing it.
10021 10021 */
10022 10022 bp_mapout(bp);
10023 10023 pageio_done(bp);
10024 10024
10025 10025 savepp = pp;
10026 10026 do {
10027 10027 pp->p_fsdata = C_NOCOMMIT;
10028 10028 } while ((pp = pp->p_next) != savepp);
10029 10029
10030 10030 if (error == NFS_EOF) {
10031 10031 /*
10032 10032 * If doing a write system call just return
10033 10033 * zeroed pages, else user tried to get pages
10034 10034 * beyond EOF, return error. We don't check
10035 10035 * that the rw flag is S_WRITE here because
10036 10036 * some implementations may attempt a read
10037 10037 * access to the buffer before copying data.
10038 10038 */
10039 10039 if (seg == segkmap)
10040 10040 error = 0;
10041 10041 else
10042 10042 error = EFAULT;
10043 10043 }
10044 10044
10045 10045 if (!readahead_issued && !error) {
10046 10046 mutex_enter(&rp->r_statelock);
10047 10047 rp->r_nextr = io_off + io_len;
10048 10048 mutex_exit(&rp->r_statelock);
10049 10049 }
10050 10050 }
10051 10051 }
10052 10052
10053 10053 out:
10054 10054 if (pl == NULL)
10055 10055 return (error);
10056 10056
10057 10057 if (error) {
10058 10058 if (pp != NULL)
10059 10059 pvn_read_done(pp, B_ERROR);
10060 10060 return (error);
10061 10061 }
10062 10062
10063 10063 if (pagefound) {
10064 10064 se_t se = (rw == S_CREATE ? SE_EXCL : SE_SHARED);
10065 10065
10066 10066 /*
10067 10067 * Page exists in the cache, acquire the appropriate lock.
10068 10068 * If this fails, start all over again.
10069 10069 */
10070 10070 if ((pp = page_lookup(vp, off, se)) == NULL) {
10071 10071 #ifdef DEBUG
10072 10072 nfs4_lostpage++;
10073 10073 #endif
10074 10074 goto reread;
10075 10075 }
10076 10076 pl[0] = pp;
10077 10077 pl[1] = NULL;
10078 10078 return (0);
10079 10079 }
10080 10080
10081 10081 if (pp != NULL)
10082 10082 pvn_plist_init(pp, pl, plsz, off, io_len, rw);
10083 10083
10084 10084 return (error);
10085 10085 }
10086 10086
10087 10087 static void
10088 10088 nfs4_readahead(vnode_t *vp, u_offset_t blkoff, caddr_t addr, struct seg *seg,
10089 10089 cred_t *cr)
10090 10090 {
10091 10091 int error;
10092 10092 page_t *pp;
10093 10093 u_offset_t io_off;
10094 10094 size_t io_len;
10095 10095 struct buf *bp;
10096 10096 uint_t bsize, blksize;
10097 10097 rnode4_t *rp = VTOR4(vp);
10098 10098 page_t *savepp;
10099 10099
10100 10100 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
10101 10101
10102 10102 bsize = MAX(vp->v_vfsp->vfs_bsize, PAGESIZE);
10103 10103
10104 10104 mutex_enter(&rp->r_statelock);
10105 10105 if (blkoff < rp->r_size && blkoff + bsize > rp->r_size) {
10106 10106 /*
10107 10107 * If less than a block left in file read less
10108 10108 * than a block.
10109 10109 */
10110 10110 blksize = rp->r_size - blkoff;
10111 10111 } else
10112 10112 blksize = bsize;
10113 10113 mutex_exit(&rp->r_statelock);
10114 10114
10115 10115 pp = pvn_read_kluster(vp, blkoff, segkmap, addr,
10116 10116 &io_off, &io_len, blkoff, blksize, 1);
10117 10117 /*
10118 10118 * The isra flag passed to the kluster function is 1, we may have
10119 10119 * gotten a return value of NULL for a variety of reasons (# of free
10120 10120 * pages < minfree, someone entered the page on the vnode etc). In all
10121 10121 * cases, we want to punt on the readahead.
10122 10122 */
10123 10123 if (pp == NULL)
10124 10124 return;
10125 10125
10126 10126 /*
10127 10127 * Now round the request size up to page boundaries.
10128 10128 * This ensures that the entire page will be
10129 10129 * initialized to zeroes if EOF is encountered.
10130 10130 */
10131 10131 io_len = ptob(btopr(io_len));
10132 10132
10133 10133 bp = pageio_setup(pp, io_len, vp, B_READ);
10134 10134 ASSERT(bp != NULL);
10135 10135
10136 10136 /*
10137 10137 * pageio_setup should have set b_addr to 0. This is correct since
10138 10138 * we want to do I/O on a page boundary. bp_mapin() will use this addr
10139 10139 * to calculate an offset, and then set b_addr to the kernel virtual
10140 10140 * address it allocated for us.
10141 10141 */
10142 10142 ASSERT(bp->b_un.b_addr == 0);
10143 10143
10144 10144 bp->b_edev = 0;
10145 10145 bp->b_dev = 0;
10146 10146 bp->b_lblkno = lbtodb(io_off);
10147 10147 bp->b_file = vp;
10148 10148 bp->b_offset = (offset_t)blkoff;
10149 10149 bp_mapin(bp);
10150 10150
10151 10151 /*
10152 10152 * If doing a write beyond what we believe is EOF, don't bother trying
10153 10153 * to read the pages from the server, we'll just zero the pages here.
10154 10154 * We don't check that the rw flag is S_WRITE here because some
10155 10155 * implementations may attempt a read access to the buffer before
10156 10156 * copying data.
10157 10157 */
10158 10158 mutex_enter(&rp->r_statelock);
10159 10159 if (io_off >= rp->r_size && seg == segkmap) {
10160 10160 mutex_exit(&rp->r_statelock);
10161 10161 bzero(bp->b_un.b_addr, io_len);
10162 10162 error = 0;
10163 10163 } else {
10164 10164 mutex_exit(&rp->r_statelock);
10165 10165 error = nfs4_bio(bp, NULL, cr, TRUE);
10166 10166 if (error == NFS_EOF)
10167 10167 error = 0;
10168 10168 }
10169 10169
10170 10170 /*
10171 10171 * Unmap the buffer before freeing it.
10172 10172 */
10173 10173 bp_mapout(bp);
10174 10174 pageio_done(bp);
10175 10175
10176 10176 savepp = pp;
10177 10177 do {
10178 10178 pp->p_fsdata = C_NOCOMMIT;
10179 10179 } while ((pp = pp->p_next) != savepp);
10180 10180
10181 10181 pvn_read_done(pp, error ? B_READ | B_ERROR : B_READ);
10182 10182
10183 10183 /*
10184 10184 * In case of error set readahead offset
10185 10185 * to the lowest offset.
10186 10186 * pvn_read_done() calls VN_DISPOSE to destroy the pages
10187 10187 */
10188 10188 if (error && rp->r_nextr > io_off) {
10189 10189 mutex_enter(&rp->r_statelock);
10190 10190 if (rp->r_nextr > io_off)
10191 10191 rp->r_nextr = io_off;
10192 10192 mutex_exit(&rp->r_statelock);
10193 10193 }
10194 10194 }
10195 10195
10196 10196 /*
10197 10197 * Flags are composed of {B_INVAL, B_FREE, B_DONTNEED, B_FORCE}
10198 10198 * If len == 0, do from off to EOF.
10199 10199 *
10200 10200 * The normal cases should be len == 0 && off == 0 (entire vp list) or
10201 10201 * len == MAXBSIZE (from segmap_release actions), and len == PAGESIZE
10202 10202 * (from pageout).
10203 10203 */
10204 10204 /* ARGSUSED */
10205 10205 static int
10206 10206 nfs4_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr,
10207 10207 caller_context_t *ct)
10208 10208 {
10209 10209 int error;
10210 10210 rnode4_t *rp;
10211 10211
10212 10212 ASSERT(cr != NULL);
10213 10213
10214 10214 if (!(flags & B_ASYNC) && nfs_zone() != VTOMI4(vp)->mi_zone)
10215 10215 return (EIO);
10216 10216
10217 10217 rp = VTOR4(vp);
10218 10218 if (IS_SHADOW(vp, rp))
10219 10219 vp = RTOV4(rp);
10220 10220
10221 10221 /*
10222 10222 * XXX - Why should this check be made here?
10223 10223 */
10224 10224 if (vp->v_flag & VNOMAP)
10225 10225 return (ENOSYS);
10226 10226
10227 10227 if (len == 0 && !(flags & B_INVAL) &&
10228 10228 (vp->v_vfsp->vfs_flag & VFS_RDONLY))
10229 10229 return (0);
10230 10230
10231 10231 mutex_enter(&rp->r_statelock);
10232 10232 rp->r_count++;
10233 10233 mutex_exit(&rp->r_statelock);
10234 10234 error = nfs4_putpages(vp, off, len, flags, cr);
10235 10235 mutex_enter(&rp->r_statelock);
10236 10236 rp->r_count--;
10237 10237 cv_broadcast(&rp->r_cv);
10238 10238 mutex_exit(&rp->r_statelock);
10239 10239
10240 10240 return (error);
10241 10241 }
10242 10242
10243 10243 /*
10244 10244 * Write out a single page, possibly klustering adjacent dirty pages.
10245 10245 */
10246 10246 int
10247 10247 nfs4_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, size_t *lenp,
10248 10248 int flags, cred_t *cr)
10249 10249 {
10250 10250 u_offset_t io_off;
10251 10251 u_offset_t lbn_off;
10252 10252 u_offset_t lbn;
10253 10253 size_t io_len;
10254 10254 uint_t bsize;
10255 10255 int error;
10256 10256 rnode4_t *rp;
10257 10257
10258 10258 ASSERT(!(vp->v_vfsp->vfs_flag & VFS_RDONLY));
10259 10259 ASSERT(pp != NULL);
10260 10260 ASSERT(cr != NULL);
10261 10261 ASSERT((flags & B_ASYNC) || nfs_zone() == VTOMI4(vp)->mi_zone);
10262 10262
10263 10263 rp = VTOR4(vp);
10264 10264 ASSERT(rp->r_count > 0);
10265 10265 ASSERT(!IS_SHADOW(vp, rp));
10266 10266
10267 10267 bsize = MAX(vp->v_vfsp->vfs_bsize, PAGESIZE);
10268 10268 lbn = pp->p_offset / bsize;
10269 10269 lbn_off = lbn * bsize;
10270 10270
10271 10271 /*
10272 10272 * Find a kluster that fits in one block, or in
10273 10273 * one page if pages are bigger than blocks. If
10274 10274 * there is less file space allocated than a whole
10275 10275 * page, we'll shorten the i/o request below.
10276 10276 */
10277 10277 pp = pvn_write_kluster(vp, pp, &io_off, &io_len, lbn_off,
10278 10278 roundup(bsize, PAGESIZE), flags);
10279 10279
10280 10280 /*
10281 10281 * pvn_write_kluster shouldn't have returned a page with offset
10282 10282 * behind the original page we were given. Verify that.
10283 10283 */
10284 10284 ASSERT((pp->p_offset / bsize) >= lbn);
10285 10285
10286 10286 /*
10287 10287 * Now pp will have the list of kept dirty pages marked for
10288 10288 * write back. It will also handle invalidation and freeing
10289 10289 * of pages that are not dirty. Check for page length rounding
10290 10290 * problems.
10291 10291 */
10292 10292 if (io_off + io_len > lbn_off + bsize) {
10293 10293 ASSERT((io_off + io_len) - (lbn_off + bsize) < PAGESIZE);
10294 10294 io_len = lbn_off + bsize - io_off;
10295 10295 }
10296 10296 /*
10297 10297 * The R4MODINPROGRESS flag makes sure that nfs4_bio() sees a
10298 10298 * consistent value of r_size. R4MODINPROGRESS is set in writerp4().
10299 10299 * When R4MODINPROGRESS is set it indicates that a uiomove() is in
10300 10300 * progress and the r_size has not been made consistent with the
10301 10301 * new size of the file. When the uiomove() completes the r_size is
10302 10302 * updated and the R4MODINPROGRESS flag is cleared.
10303 10303 *
10304 10304 * The R4MODINPROGRESS flag makes sure that nfs4_bio() sees a
10305 10305 * consistent value of r_size. Without this handshaking, it is
10306 10306 * possible that nfs4_bio() picks up the old value of r_size
10307 10307 * before the uiomove() in writerp4() completes. This will result
10308 10308 * in the write through nfs4_bio() being dropped.
10309 10309 *
10310 10310 * More precisely, there is a window between the time the uiomove()
10311 10311 * completes and the time the r_size is updated. If a VOP_PUTPAGE()
10312 10312 * operation intervenes in this window, the page will be picked up,
10313 10313 * because it is dirty (it will be unlocked, unless it was
10314 10314 * pagecreate'd). When the page is picked up as dirty, the dirty
10315 10315 * bit is reset (pvn_getdirty()). In nfs4write(), r_size is
10316 10316 * checked. This will still be the old size. Therefore the page will
10317 10317 * not be written out. When segmap_release() calls VOP_PUTPAGE(),
10318 10318 * the page will be found to be clean and the write will be dropped.
10319 10319 */
10320 10320 if (rp->r_flags & R4MODINPROGRESS) {
10321 10321 mutex_enter(&rp->r_statelock);
10322 10322 if ((rp->r_flags & R4MODINPROGRESS) &&
10323 10323 rp->r_modaddr + MAXBSIZE > io_off &&
10324 10324 rp->r_modaddr < io_off + io_len) {
10325 10325 page_t *plist;
10326 10326 /*
10327 10327 * A write is in progress for this region of the file.
10328 10328 * If we did not detect R4MODINPROGRESS here then this
10329 10329 * path through nfs_putapage() would eventually go to
10330 10330 * nfs4_bio() and may not write out all of the data
10331 10331 * in the pages. We end up losing data. So we decide
10332 10332 * to set the modified bit on each page in the page
10333 10333 * list and mark the rnode with R4DIRTY. This write
10334 10334 * will be restarted at some later time.
10335 10335 */
10336 10336 plist = pp;
10337 10337 while (plist != NULL) {
10338 10338 pp = plist;
10339 10339 page_sub(&plist, pp);
10340 10340 hat_setmod(pp);
10341 10341 page_io_unlock(pp);
10342 10342 page_unlock(pp);
10343 10343 }
10344 10344 rp->r_flags |= R4DIRTY;
10345 10345 mutex_exit(&rp->r_statelock);
10346 10346 if (offp)
10347 10347 *offp = io_off;
10348 10348 if (lenp)
10349 10349 *lenp = io_len;
10350 10350 return (0);
10351 10351 }
10352 10352 mutex_exit(&rp->r_statelock);
10353 10353 }
10354 10354
10355 10355 if (flags & B_ASYNC) {
10356 10356 error = nfs4_async_putapage(vp, pp, io_off, io_len, flags, cr,
10357 10357 nfs4_sync_putapage);
10358 10358 } else
10359 10359 error = nfs4_sync_putapage(vp, pp, io_off, io_len, flags, cr);
10360 10360
10361 10361 if (offp)
10362 10362 *offp = io_off;
10363 10363 if (lenp)
10364 10364 *lenp = io_len;
10365 10365 return (error);
10366 10366 }
10367 10367
10368 10368 static int
10369 10369 nfs4_sync_putapage(vnode_t *vp, page_t *pp, u_offset_t io_off, size_t io_len,
10370 10370 int flags, cred_t *cr)
10371 10371 {
10372 10372 int error;
10373 10373 rnode4_t *rp;
10374 10374
10375 10375 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
10376 10376
10377 10377 flags |= B_WRITE;
10378 10378
10379 10379 error = nfs4_rdwrlbn(vp, pp, io_off, io_len, flags, cr);
10380 10380
10381 10381 rp = VTOR4(vp);
10382 10382
10383 10383 if ((error == ENOSPC || error == EDQUOT || error == EFBIG ||
10384 10384 error == EACCES) &&
10385 10385 (flags & (B_INVAL|B_FORCE)) != (B_INVAL|B_FORCE)) {
10386 10386 if (!(rp->r_flags & R4OUTOFSPACE)) {
10387 10387 mutex_enter(&rp->r_statelock);
10388 10388 rp->r_flags |= R4OUTOFSPACE;
10389 10389 mutex_exit(&rp->r_statelock);
10390 10390 }
10391 10391 flags |= B_ERROR;
10392 10392 pvn_write_done(pp, flags);
10393 10393 /*
10394 10394 * If this was not an async thread, then try again to
10395 10395 * write out the pages, but this time, also destroy
10396 10396 * them whether or not the write is successful. This
10397 10397 * will prevent memory from filling up with these
10398 10398 * pages and destroying them is the only alternative
10399 10399 * if they can't be written out.
10400 10400 *
10401 10401 * Don't do this if this is an async thread because
10402 10402 * when the pages are unlocked in pvn_write_done,
10403 10403 * some other thread could have come along, locked
10404 10404 * them, and queued for an async thread. It would be
10405 10405 * possible for all of the async threads to be tied
10406 10406 * up waiting to lock the pages again and they would
10407 10407 * all already be locked and waiting for an async
10408 10408 * thread to handle them. Deadlock.
10409 10409 */
10410 10410 if (!(flags & B_ASYNC)) {
10411 10411 error = nfs4_putpage(vp, io_off, io_len,
10412 10412 B_INVAL | B_FORCE, cr, NULL);
10413 10413 }
10414 10414 } else {
10415 10415 if (error)
10416 10416 flags |= B_ERROR;
10417 10417 else if (rp->r_flags & R4OUTOFSPACE) {
10418 10418 mutex_enter(&rp->r_statelock);
10419 10419 rp->r_flags &= ~R4OUTOFSPACE;
10420 10420 mutex_exit(&rp->r_statelock);
10421 10421 }
10422 10422 pvn_write_done(pp, flags);
10423 10423 if (freemem < desfree)
10424 10424 (void) nfs4_commit_vp(vp, (u_offset_t)0, 0, cr,
10425 10425 NFS4_WRITE_NOWAIT);
10426 10426 }
10427 10427
10428 10428 return (error);
10429 10429 }
10430 10430
10431 10431 #ifdef DEBUG
10432 10432 int nfs4_force_open_before_mmap = 0;
10433 10433 #endif
10434 10434
10435 10435 /* ARGSUSED */
10436 10436 static int
10437 10437 nfs4_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp,
10438 10438 size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr,
10439 10439 caller_context_t *ct)
10440 10440 {
10441 10441 struct segvn_crargs vn_a;
10442 10442 int error = 0;
10443 10443 rnode4_t *rp = VTOR4(vp);
10444 10444 mntinfo4_t *mi = VTOMI4(vp);
10445 10445
10446 10446 if (nfs_zone() != VTOMI4(vp)->mi_zone)
10447 10447 return (EIO);
10448 10448
10449 10449 if (vp->v_flag & VNOMAP)
10450 10450 return (ENOSYS);
10451 10451
10452 10452 if (off < 0 || (off + len) < 0)
10453 10453 return (ENXIO);
10454 10454
10455 10455 if (vp->v_type != VREG)
10456 10456 return (ENODEV);
10457 10457
10458 10458 /*
10459 10459 * If the file is delegated to the client don't do anything.
10460 10460 * If the file is not delegated, then validate the data cache.
10461 10461 */
10462 10462 mutex_enter(&rp->r_statev4_lock);
10463 10463 if (rp->r_deleg_type == OPEN_DELEGATE_NONE) {
10464 10464 mutex_exit(&rp->r_statev4_lock);
10465 10465 error = nfs4_validate_caches(vp, cr);
10466 10466 if (error)
10467 10467 return (error);
10468 10468 } else {
10469 10469 mutex_exit(&rp->r_statev4_lock);
10470 10470 }
10471 10471
10472 10472 /*
10473 10473 * Check to see if the vnode is currently marked as not cachable.
10474 10474 * This means portions of the file are locked (through VOP_FRLOCK).
10475 10475 * In this case the map request must be refused. We use
10476 10476 * rp->r_lkserlock to avoid a race with concurrent lock requests.
10477 10477 *
10478 10478 * Atomically increment r_inmap after acquiring r_rwlock. The
10479 10479 * idea here is to acquire r_rwlock to block read/write and
10480 10480 * not to protect r_inmap. r_inmap will inform nfs4_read/write()
10481 10481 * that we are in nfs4_map(). Now, r_rwlock is acquired in order
10482 10482 * and we can prevent the deadlock that would have occurred
10483 10483 * when nfs4_addmap() would have acquired it out of order.
10484 10484 *
10485 10485 * Since we are not protecting r_inmap by any lock, we do not
10486 10486 * hold any lock when we decrement it. We atomically decrement
10487 10487 * r_inmap after we release r_lkserlock.
10488 10488 */
10489 10489
10490 10490 if (nfs_rw_enter_sig(&rp->r_rwlock, RW_WRITER, INTR4(vp)))
10491 10491 return (EINTR);
10492 10492 atomic_inc_uint(&rp->r_inmap);
10493 10493 nfs_rw_exit(&rp->r_rwlock);
10494 10494
10495 10495 if (nfs_rw_enter_sig(&rp->r_lkserlock, RW_READER, INTR4(vp))) {
10496 10496 atomic_dec_uint(&rp->r_inmap);
10497 10497 return (EINTR);
10498 10498 }
10499 10499
10500 10500
10501 10501 if (vp->v_flag & VNOCACHE) {
10502 10502 error = EAGAIN;
10503 10503 goto done;
10504 10504 }
10505 10505
10506 10506 /*
10507 10507 * Don't allow concurrent locks and mapping if mandatory locking is
10508 10508 * enabled.
10509 10509 */
10510 10510 if (flk_has_remote_locks(vp)) {
10511 10511 struct vattr va;
10512 10512 va.va_mask = AT_MODE;
10513 10513 error = nfs4getattr(vp, &va, cr);
10514 10514 if (error != 0)
10515 10515 goto done;
10516 10516 if (MANDLOCK(vp, va.va_mode)) {
10517 10517 error = EAGAIN;
10518 10518 goto done;
10519 10519 }
10520 10520 }
10521 10521
10522 10522 /*
10523 10523 * It is possible that the rnode has a lost lock request that we
10524 10524 * are still trying to recover, and that the request conflicts with
10525 10525 * this map request.
10526 10526 *
10527 10527 * An alternative approach would be for nfs4_safemap() to consider
10528 10528 * queued lock requests when deciding whether to set or clear
10529 10529 * VNOCACHE. This would require the frlock code path to call
10530 10530 * nfs4_safemap() after enqueing a lost request.
10531 10531 */
10532 10532 if (nfs4_map_lost_lock_conflict(vp)) {
10533 10533 error = EAGAIN;
10534 10534 goto done;
10535 10535 }
10536 10536
10537 10537 as_rangelock(as);
10538 10538 error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags);
10539 10539 if (error != 0) {
10540 10540 as_rangeunlock(as);
10541 10541 goto done;
10542 10542 }
10543 10543
10544 10544 if (vp->v_type == VREG) {
10545 10545 /*
10546 10546 * We need to retrieve the open stream
10547 10547 */
10548 10548 nfs4_open_stream_t *osp = NULL;
10549 10549 nfs4_open_owner_t *oop = NULL;
10550 10550
10551 10551 oop = find_open_owner(cr, NFS4_PERM_CREATED, mi);
10552 10552 if (oop != NULL) {
10553 10553 /* returns with 'os_sync_lock' held */
10554 10554 osp = find_open_stream(oop, rp);
10555 10555 open_owner_rele(oop);
10556 10556 }
10557 10557 if (osp == NULL) {
10558 10558 #ifdef DEBUG
10559 10559 if (nfs4_force_open_before_mmap) {
10560 10560 error = EIO;
10561 10561 goto done;
10562 10562 }
10563 10563 #endif
10564 10564 /* returns with 'os_sync_lock' held */
10565 10565 error = open_and_get_osp(vp, cr, &osp);
10566 10566 if (osp == NULL) {
10567 10567 NFS4_DEBUG(nfs4_mmap_debug, (CE_NOTE,
10568 10568 "nfs4_map: we tried to OPEN the file "
10569 10569 "but again no osp, so fail with EIO"));
10570 10570 goto done;
10571 10571 }
10572 10572 }
10573 10573
10574 10574 if (osp->os_failed_reopen) {
10575 10575 mutex_exit(&osp->os_sync_lock);
10576 10576 open_stream_rele(osp, rp);
10577 10577 NFS4_DEBUG(nfs4_open_stream_debug, (CE_NOTE,
10578 10578 "nfs4_map: os_failed_reopen set on "
10579 10579 "osp %p, cr %p, rp %s", (void *)osp,
10580 10580 (void *)cr, rnode4info(rp)));
10581 10581 error = EIO;
10582 10582 goto done;
10583 10583 }
10584 10584 mutex_exit(&osp->os_sync_lock);
10585 10585 open_stream_rele(osp, rp);
10586 10586 }
10587 10587
10588 10588 vn_a.vp = vp;
10589 10589 vn_a.offset = off;
10590 10590 vn_a.type = (flags & MAP_TYPE);
10591 10591 vn_a.prot = (uchar_t)prot;
10592 10592 vn_a.maxprot = (uchar_t)maxprot;
10593 10593 vn_a.flags = (flags & ~MAP_TYPE);
10594 10594 vn_a.cred = cr;
10595 10595 vn_a.amp = NULL;
10596 10596 vn_a.szc = 0;
10597 10597 vn_a.lgrp_mem_policy_flags = 0;
10598 10598
10599 10599 error = as_map(as, *addrp, len, segvn_create, &vn_a);
10600 10600 as_rangeunlock(as);
10601 10601
10602 10602 done:
10603 10603 nfs_rw_exit(&rp->r_lkserlock);
10604 10604 atomic_dec_uint(&rp->r_inmap);
10605 10605 return (error);
10606 10606 }
10607 10607
10608 10608 /*
10609 10609 * We're most likely dealing with a kernel module that likes to READ
10610 10610 * and mmap without OPENing the file (ie: lookup/read/mmap), so lets
10611 10611 * officially OPEN the file to create the necessary client state
10612 10612 * for bookkeeping of os_mmap_read/write counts.
10613 10613 *
10614 10614 * Since VOP_MAP only passes in a pointer to the vnode rather than
10615 10615 * a double pointer, we can't handle the case where nfs4open_otw()
10616 10616 * returns a different vnode than the one passed into VOP_MAP (since
10617 10617 * VOP_DELMAP will not see the vnode nfs4open_otw used). In this case,
10618 10618 * we return NULL and let nfs4_map() fail. Note: the only case where
10619 10619 * this should happen is if the file got removed and replaced with the
10620 10620 * same name on the server (in addition to the fact that we're trying
10621 10621 * to VOP_MAP withouth VOP_OPENing the file in the first place).
10622 10622 */
10623 10623 static int
10624 10624 open_and_get_osp(vnode_t *map_vp, cred_t *cr, nfs4_open_stream_t **ospp)
10625 10625 {
10626 10626 rnode4_t *rp, *drp;
10627 10627 vnode_t *dvp, *open_vp;
10628 10628 char file_name[MAXNAMELEN];
10629 10629 int just_created;
10630 10630 nfs4_open_stream_t *osp;
10631 10631 nfs4_open_owner_t *oop;
10632 10632 int error;
10633 10633
10634 10634 *ospp = NULL;
10635 10635 open_vp = map_vp;
10636 10636
10637 10637 rp = VTOR4(open_vp);
10638 10638 if ((error = vtodv(open_vp, &dvp, cr, TRUE)) != 0)
10639 10639 return (error);
10640 10640 drp = VTOR4(dvp);
10641 10641
10642 10642 if (nfs_rw_enter_sig(&drp->r_rwlock, RW_READER, INTR4(dvp))) {
10643 10643 VN_RELE(dvp);
10644 10644 return (EINTR);
10645 10645 }
10646 10646
10647 10647 if ((error = vtoname(open_vp, file_name, MAXNAMELEN)) != 0) {
10648 10648 nfs_rw_exit(&drp->r_rwlock);
10649 10649 VN_RELE(dvp);
10650 10650 return (error);
10651 10651 }
10652 10652
10653 10653 mutex_enter(&rp->r_statev4_lock);
10654 10654 if (rp->created_v4) {
10655 10655 rp->created_v4 = 0;
10656 10656 mutex_exit(&rp->r_statev4_lock);
10657 10657
10658 10658 dnlc_update(dvp, file_name, open_vp);
10659 10659 /* This is needed so we don't bump the open ref count */
10660 10660 just_created = 1;
10661 10661 } else {
10662 10662 mutex_exit(&rp->r_statev4_lock);
10663 10663 just_created = 0;
10664 10664 }
10665 10665
10666 10666 VN_HOLD(map_vp);
10667 10667
10668 10668 error = nfs4open_otw(dvp, file_name, NULL, &open_vp, cr, 0, FREAD, 0,
10669 10669 just_created);
10670 10670 if (error) {
10671 10671 nfs_rw_exit(&drp->r_rwlock);
10672 10672 VN_RELE(dvp);
10673 10673 VN_RELE(map_vp);
10674 10674 return (error);
10675 10675 }
10676 10676
10677 10677 nfs_rw_exit(&drp->r_rwlock);
10678 10678 VN_RELE(dvp);
10679 10679
10680 10680 /*
10681 10681 * If nfs4open_otw() returned a different vnode then "undo"
10682 10682 * the open and return failure to the caller.
10683 10683 */
10684 10684 if (!VN_CMP(open_vp, map_vp)) {
10685 10685 nfs4_error_t e;
10686 10686
10687 10687 NFS4_DEBUG(nfs4_mmap_debug, (CE_NOTE, "open_and_get_osp: "
10688 10688 "open returned a different vnode"));
10689 10689 /*
10690 10690 * If there's an error, ignore it,
10691 10691 * and let VOP_INACTIVE handle it.
10692 10692 */
10693 10693 (void) nfs4close_one(open_vp, NULL, cr, FREAD, NULL, &e,
10694 10694 CLOSE_NORM, 0, 0, 0);
10695 10695 VN_RELE(map_vp);
10696 10696 return (EIO);
10697 10697 }
10698 10698
10699 10699 VN_RELE(map_vp);
10700 10700
10701 10701 oop = find_open_owner(cr, NFS4_PERM_CREATED, VTOMI4(open_vp));
10702 10702 if (!oop) {
10703 10703 nfs4_error_t e;
10704 10704
10705 10705 NFS4_DEBUG(nfs4_mmap_debug, (CE_NOTE, "open_and_get_osp: "
10706 10706 "no open owner"));
10707 10707 /*
10708 10708 * If there's an error, ignore it,
10709 10709 * and let VOP_INACTIVE handle it.
10710 10710 */
10711 10711 (void) nfs4close_one(open_vp, NULL, cr, FREAD, NULL, &e,
10712 10712 CLOSE_NORM, 0, 0, 0);
10713 10713 return (EIO);
10714 10714 }
10715 10715 osp = find_open_stream(oop, rp);
10716 10716 open_owner_rele(oop);
10717 10717 *ospp = osp;
10718 10718 return (0);
10719 10719 }
10720 10720
10721 10721 /*
10722 10722 * Please be aware that when this function is called, the address space write
10723 10723 * a_lock is held. Do not put over the wire calls in this function.
10724 10724 */
10725 10725 /* ARGSUSED */
10726 10726 static int
10727 10727 nfs4_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr,
10728 10728 size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr,
10729 10729 caller_context_t *ct)
10730 10730 {
10731 10731 rnode4_t *rp;
10732 10732 int error = 0;
10733 10733 mntinfo4_t *mi;
10734 10734
10735 10735 mi = VTOMI4(vp);
10736 10736 rp = VTOR4(vp);
10737 10737
10738 10738 if (nfs_zone() != mi->mi_zone)
10739 10739 return (EIO);
10740 10740 if (vp->v_flag & VNOMAP)
10741 10741 return (ENOSYS);
10742 10742
10743 10743 /*
10744 10744 * Don't need to update the open stream first, since this
10745 10745 * mmap can't add any additional share access that isn't
10746 10746 * already contained in the open stream (for the case where we
10747 10747 * open/mmap/only update rp->r_mapcnt/server reboots/reopen doesn't
10748 10748 * take into account os_mmap_read[write] counts).
10749 10749 */
10750 10750 atomic_add_long((ulong_t *)&rp->r_mapcnt, btopr(len));
10751 10751
10752 10752 if (vp->v_type == VREG) {
10753 10753 /*
10754 10754 * We need to retrieve the open stream and update the counts.
10755 10755 * If there is no open stream here, something is wrong.
10756 10756 */
10757 10757 nfs4_open_stream_t *osp = NULL;
10758 10758 nfs4_open_owner_t *oop = NULL;
10759 10759
10760 10760 oop = find_open_owner(cr, NFS4_PERM_CREATED, mi);
10761 10761 if (oop != NULL) {
10762 10762 /* returns with 'os_sync_lock' held */
10763 10763 osp = find_open_stream(oop, rp);
10764 10764 open_owner_rele(oop);
10765 10765 }
10766 10766 if (osp == NULL) {
10767 10767 NFS4_DEBUG(nfs4_mmap_debug, (CE_NOTE,
10768 10768 "nfs4_addmap: we should have an osp"
10769 10769 "but we don't, so fail with EIO"));
10770 10770 error = EIO;
10771 10771 goto out;
10772 10772 }
10773 10773
10774 10774 NFS4_DEBUG(nfs4_mmap_debug, (CE_NOTE, "nfs4_addmap: osp %p,"
10775 10775 " pages %ld, prot 0x%x", (void *)osp, btopr(len), prot));
10776 10776
10777 10777 /*
10778 10778 * Update the map count in the open stream.
10779 10779 * This is necessary in the case where we
10780 10780 * open/mmap/close/, then the server reboots, and we
10781 10781 * attempt to reopen. If the mmap doesn't add share
10782 10782 * access then we send an invalid reopen with
10783 10783 * access = NONE.
10784 10784 *
10785 10785 * We need to specifically check each PROT_* so a mmap
10786 10786 * call of (PROT_WRITE | PROT_EXEC) will ensure us both
10787 10787 * read and write access. A simple comparison of prot
10788 10788 * to ~PROT_WRITE to determine read access is insufficient
10789 10789 * since prot can be |= with PROT_USER, etc.
10790 10790 */
10791 10791
10792 10792 /*
10793 10793 * Unless we're MAP_SHARED, no sense in adding os_mmap_write
10794 10794 */
10795 10795 if ((flags & MAP_SHARED) && (maxprot & PROT_WRITE))
10796 10796 osp->os_mmap_write += btopr(len);
10797 10797 if (maxprot & PROT_READ)
10798 10798 osp->os_mmap_read += btopr(len);
10799 10799 if (maxprot & PROT_EXEC)
10800 10800 osp->os_mmap_read += btopr(len);
10801 10801 /*
10802 10802 * Ensure that os_mmap_read gets incremented, even if
10803 10803 * maxprot were to look like PROT_NONE.
10804 10804 */
10805 10805 if (!(maxprot & PROT_READ) && !(maxprot & PROT_WRITE) &&
10806 10806 !(maxprot & PROT_EXEC))
10807 10807 osp->os_mmap_read += btopr(len);
10808 10808 osp->os_mapcnt += btopr(len);
10809 10809 mutex_exit(&osp->os_sync_lock);
10810 10810 open_stream_rele(osp, rp);
10811 10811 }
10812 10812
10813 10813 out:
10814 10814 /*
10815 10815 * If we got an error, then undo our
10816 10816 * incrementing of 'r_mapcnt'.
10817 10817 */
10818 10818
10819 10819 if (error) {
10820 10820 atomic_add_long((ulong_t *)&rp->r_mapcnt, -btopr(len));
10821 10821 ASSERT(rp->r_mapcnt >= 0);
10822 10822 }
10823 10823 return (error);
10824 10824 }
10825 10825
10826 10826 /* ARGSUSED */
10827 10827 static int
10828 10828 nfs4_cmp(vnode_t *vp1, vnode_t *vp2, caller_context_t *ct)
10829 10829 {
10830 10830
10831 10831 return (VTOR4(vp1) == VTOR4(vp2));
10832 10832 }
10833 10833
10834 10834 /* ARGSUSED */
10835 10835 static int
10836 10836 nfs4_frlock(vnode_t *vp, int cmd, struct flock64 *bfp, int flag,
10837 10837 offset_t offset, struct flk_callback *flk_cbp, cred_t *cr,
10838 10838 caller_context_t *ct)
10839 10839 {
10840 10840 int rc;
10841 10841 u_offset_t start, end;
10842 10842 rnode4_t *rp;
10843 10843 int error = 0, intr = INTR4(vp);
10844 10844 nfs4_error_t e;
10845 10845
10846 10846 if (nfs_zone() != VTOMI4(vp)->mi_zone)
10847 10847 return (EIO);
10848 10848
10849 10849 /* check for valid cmd parameter */
10850 10850 if (cmd != F_GETLK && cmd != F_SETLK && cmd != F_SETLKW)
10851 10851 return (EINVAL);
10852 10852
10853 10853 /* Verify l_type. */
10854 10854 switch (bfp->l_type) {
10855 10855 case F_RDLCK:
10856 10856 if (cmd != F_GETLK && !(flag & FREAD))
10857 10857 return (EBADF);
10858 10858 break;
10859 10859 case F_WRLCK:
10860 10860 if (cmd != F_GETLK && !(flag & FWRITE))
10861 10861 return (EBADF);
10862 10862 break;
10863 10863 case F_UNLCK:
10864 10864 intr = 0;
10865 10865 break;
10866 10866
10867 10867 default:
10868 10868 return (EINVAL);
10869 10869 }
10870 10870
10871 10871 /* check the validity of the lock range */
10872 10872 if (rc = flk_convert_lock_data(vp, bfp, &start, &end, offset))
10873 10873 return (rc);
10874 10874 if (rc = flk_check_lock_data(start, end, MAXEND))
10875 10875 return (rc);
10876 10876
10877 10877 /*
10878 10878 * If the filesystem is mounted using local locking, pass the
10879 10879 * request off to the local locking code.
10880 10880 */
10881 10881 if (VTOMI4(vp)->mi_flags & MI4_LLOCK || vp->v_type != VREG) {
10882 10882 if (cmd == F_SETLK || cmd == F_SETLKW) {
10883 10883 /*
10884 10884 * For complete safety, we should be holding
10885 10885 * r_lkserlock. However, we can't call
10886 10886 * nfs4_safelock and then fs_frlock while
10887 10887 * holding r_lkserlock, so just invoke
10888 10888 * nfs4_safelock and expect that this will
10889 10889 * catch enough of the cases.
10890 10890 */
10891 10891 if (!nfs4_safelock(vp, bfp, cr))
10892 10892 return (EAGAIN);
10893 10893 }
10894 10894 return (fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct));
10895 10895 }
10896 10896
10897 10897 rp = VTOR4(vp);
10898 10898
10899 10899 /*
10900 10900 * Check whether the given lock request can proceed, given the
10901 10901 * current file mappings.
10902 10902 */
10903 10903 if (nfs_rw_enter_sig(&rp->r_lkserlock, RW_WRITER, intr))
10904 10904 return (EINTR);
10905 10905 if (cmd == F_SETLK || cmd == F_SETLKW) {
10906 10906 if (!nfs4_safelock(vp, bfp, cr)) {
10907 10907 rc = EAGAIN;
10908 10908 goto done;
10909 10909 }
10910 10910 }
10911 10911
10912 10912 /*
10913 10913 * Flush the cache after waiting for async I/O to finish. For new
10914 10914 * locks, this is so that the process gets the latest bits from the
10915 10915 * server. For unlocks, this is so that other clients see the
10916 10916 * latest bits once the file has been unlocked. If currently dirty
10917 10917 * pages can't be flushed, then don't allow a lock to be set. But
10918 10918 * allow unlocks to succeed, to avoid having orphan locks on the
10919 10919 * server.
10920 10920 */
10921 10921 if (cmd != F_GETLK) {
10922 10922 mutex_enter(&rp->r_statelock);
10923 10923 while (rp->r_count > 0) {
10924 10924 if (intr) {
10925 10925 klwp_t *lwp = ttolwp(curthread);
10926 10926
10927 10927 if (lwp != NULL)
10928 10928 lwp->lwp_nostop++;
10929 10929 if (cv_wait_sig(&rp->r_cv,
10930 10930 &rp->r_statelock) == 0) {
10931 10931 if (lwp != NULL)
10932 10932 lwp->lwp_nostop--;
10933 10933 rc = EINTR;
10934 10934 break;
10935 10935 }
10936 10936 if (lwp != NULL)
10937 10937 lwp->lwp_nostop--;
10938 10938 } else
10939 10939 cv_wait(&rp->r_cv, &rp->r_statelock);
10940 10940 }
10941 10941 mutex_exit(&rp->r_statelock);
10942 10942 if (rc != 0)
10943 10943 goto done;
10944 10944 error = nfs4_putpage(vp, (offset_t)0, 0, B_INVAL, cr, ct);
10945 10945 if (error) {
10946 10946 if (error == ENOSPC || error == EDQUOT) {
10947 10947 mutex_enter(&rp->r_statelock);
10948 10948 if (!rp->r_error)
10949 10949 rp->r_error = error;
10950 10950 mutex_exit(&rp->r_statelock);
10951 10951 }
10952 10952 if (bfp->l_type != F_UNLCK) {
10953 10953 rc = ENOLCK;
10954 10954 goto done;
10955 10955 }
10956 10956 }
10957 10957 }
10958 10958
10959 10959 /*
10960 10960 * Call the lock manager to do the real work of contacting
10961 10961 * the server and obtaining the lock.
10962 10962 */
10963 10963 nfs4frlock(NFS4_LCK_CTYPE_NORM, vp, cmd, bfp, flag, offset,
10964 10964 cr, &e, NULL, NULL);
10965 10965 rc = e.error;
10966 10966
10967 10967 if (rc == 0)
10968 10968 nfs4_lockcompletion(vp, cmd);
10969 10969
10970 10970 done:
10971 10971 nfs_rw_exit(&rp->r_lkserlock);
10972 10972
10973 10973 return (rc);
10974 10974 }
10975 10975
10976 10976 /*
10977 10977 * Free storage space associated with the specified vnode. The portion
10978 10978 * to be freed is specified by bfp->l_start and bfp->l_len (already
10979 10979 * normalized to a "whence" of 0).
10980 10980 *
10981 10981 * This is an experimental facility whose continued existence is not
10982 10982 * guaranteed. Currently, we only support the special case
10983 10983 * of l_len == 0, meaning free to end of file.
10984 10984 */
10985 10985 /* ARGSUSED */
10986 10986 static int
10987 10987 nfs4_space(vnode_t *vp, int cmd, struct flock64 *bfp, int flag,
10988 10988 offset_t offset, cred_t *cr, caller_context_t *ct)
10989 10989 {
10990 10990 int error;
10991 10991
10992 10992 if (nfs_zone() != VTOMI4(vp)->mi_zone)
10993 10993 return (EIO);
10994 10994 ASSERT(vp->v_type == VREG);
10995 10995 if (cmd != F_FREESP)
10996 10996 return (EINVAL);
10997 10997
10998 10998 error = convoff(vp, bfp, 0, offset);
10999 10999 if (!error) {
11000 11000 ASSERT(bfp->l_start >= 0);
11001 11001 if (bfp->l_len == 0) {
11002 11002 struct vattr va;
11003 11003
11004 11004 va.va_mask = AT_SIZE;
11005 11005 va.va_size = bfp->l_start;
11006 11006 error = nfs4setattr(vp, &va, 0, cr, NULL);
11007 11007
11008 11008 if (error == 0) {
11009 11009 if (bfp->l_start == 0) {
11010 11010 vnevent_truncate(vp, ct);
11011 11011 } else {
11012 11012 vnevent_resize(vp, ct);
11013 11013 }
11014 11014 }
11015 11015 } else
11016 11016 error = EINVAL;
11017 11017 }
11018 11018
11019 11019 return (error);
11020 11020 }
11021 11021
11022 11022 /* ARGSUSED */
11023 11023 int
11024 11024 nfs4_realvp(vnode_t *vp, vnode_t **vpp, caller_context_t *ct)
11025 11025 {
11026 11026 rnode4_t *rp;
11027 11027 rp = VTOR4(vp);
11028 11028
11029 11029 if (vp->v_type == VREG && IS_SHADOW(vp, rp)) {
11030 11030 vp = RTOV4(rp);
11031 11031 }
11032 11032 *vpp = vp;
11033 11033 return (0);
11034 11034 }
11035 11035
11036 11036 /*
11037 11037 * Setup and add an address space callback to do the work of the delmap call.
11038 11038 * The callback will (and must be) deleted in the actual callback function.
11039 11039 *
11040 11040 * This is done in order to take care of the problem that we have with holding
11041 11041 * the address space's a_lock for a long period of time (e.g. if the NFS server
11042 11042 * is down). Callbacks will be executed in the address space code while the
11043 11043 * a_lock is not held. Holding the address space's a_lock causes things such
11044 11044 * as ps and fork to hang because they are trying to acquire this lock as well.
11045 11045 */
11046 11046 /* ARGSUSED */
11047 11047 static int
11048 11048 nfs4_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr,
11049 11049 size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr,
11050 11050 caller_context_t *ct)
11051 11051 {
11052 11052 int caller_found;
11053 11053 int error;
11054 11054 rnode4_t *rp;
11055 11055 nfs4_delmap_args_t *dmapp;
11056 11056 nfs4_delmapcall_t *delmap_call;
11057 11057
11058 11058 if (vp->v_flag & VNOMAP)
11059 11059 return (ENOSYS);
11060 11060
11061 11061 /*
11062 11062 * A process may not change zones if it has NFS pages mmap'ed
11063 11063 * in, so we can't legitimately get here from the wrong zone.
11064 11064 */
11065 11065 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
11066 11066
11067 11067 rp = VTOR4(vp);
11068 11068
11069 11069 /*
11070 11070 * The way that the address space of this process deletes its mapping
11071 11071 * of this file is via the following call chains:
11072 11072 * - as_free()->SEGOP_UNMAP()/segvn_unmap()->VOP_DELMAP()/nfs4_delmap()
11073 11073 * - as_unmap()->SEGOP_UNMAP()/segvn_unmap()->VOP_DELMAP()/nfs4_delmap()
11074 11074 *
11075 11075 * With the use of address space callbacks we are allowed to drop the
11076 11076 * address space lock, a_lock, while executing the NFS operations that
11077 11077 * need to go over the wire. Returning EAGAIN to the caller of this
11078 11078 * function is what drives the execution of the callback that we add
11079 11079 * below. The callback will be executed by the address space code
11080 11080 * after dropping the a_lock. When the callback is finished, since
11081 11081 * we dropped the a_lock, it must be re-acquired and segvn_unmap()
11082 11082 * is called again on the same segment to finish the rest of the work
11083 11083 * that needs to happen during unmapping.
11084 11084 *
11085 11085 * This action of calling back into the segment driver causes
11086 11086 * nfs4_delmap() to get called again, but since the callback was
11087 11087 * already executed at this point, it already did the work and there
11088 11088 * is nothing left for us to do.
11089 11089 *
11090 11090 * To Summarize:
11091 11091 * - The first time nfs4_delmap is called by the current thread is when
11092 11092 * we add the caller associated with this delmap to the delmap caller
11093 11093 * list, add the callback, and return EAGAIN.
11094 11094 * - The second time in this call chain when nfs4_delmap is called we
11095 11095 * will find this caller in the delmap caller list and realize there
11096 11096 * is no more work to do thus removing this caller from the list and
11097 11097 * returning the error that was set in the callback execution.
11098 11098 */
11099 11099 caller_found = nfs4_find_and_delete_delmapcall(rp, &error);
11100 11100 if (caller_found) {
11101 11101 /*
11102 11102 * 'error' is from the actual delmap operations. To avoid
11103 11103 * hangs, we need to handle the return of EAGAIN differently
11104 11104 * since this is what drives the callback execution.
11105 11105 * In this case, we don't want to return EAGAIN and do the
11106 11106 * callback execution because there are none to execute.
11107 11107 */
11108 11108 if (error == EAGAIN)
11109 11109 return (0);
11110 11110 else
11111 11111 return (error);
11112 11112 }
11113 11113
11114 11114 /* current caller was not in the list */
11115 11115 delmap_call = nfs4_init_delmapcall();
11116 11116
11117 11117 mutex_enter(&rp->r_statelock);
11118 11118 list_insert_tail(&rp->r_indelmap, delmap_call);
11119 11119 mutex_exit(&rp->r_statelock);
11120 11120
11121 11121 dmapp = kmem_alloc(sizeof (nfs4_delmap_args_t), KM_SLEEP);
11122 11122
11123 11123 dmapp->vp = vp;
11124 11124 dmapp->off = off;
11125 11125 dmapp->addr = addr;
11126 11126 dmapp->len = len;
11127 11127 dmapp->prot = prot;
11128 11128 dmapp->maxprot = maxprot;
11129 11129 dmapp->flags = flags;
11130 11130 dmapp->cr = cr;
11131 11131 dmapp->caller = delmap_call;
11132 11132
11133 11133 error = as_add_callback(as, nfs4_delmap_callback, dmapp,
11134 11134 AS_UNMAP_EVENT, addr, len, KM_SLEEP);
11135 11135
11136 11136 return (error ? error : EAGAIN);
11137 11137 }
11138 11138
11139 11139 static nfs4_delmapcall_t *
11140 11140 nfs4_init_delmapcall()
11141 11141 {
11142 11142 nfs4_delmapcall_t *delmap_call;
11143 11143
11144 11144 delmap_call = kmem_alloc(sizeof (nfs4_delmapcall_t), KM_SLEEP);
11145 11145 delmap_call->call_id = curthread;
11146 11146 delmap_call->error = 0;
11147 11147
11148 11148 return (delmap_call);
11149 11149 }
11150 11150
11151 11151 static void
11152 11152 nfs4_free_delmapcall(nfs4_delmapcall_t *delmap_call)
11153 11153 {
11154 11154 kmem_free(delmap_call, sizeof (nfs4_delmapcall_t));
11155 11155 }
11156 11156
11157 11157 /*
11158 11158 * Searches for the current delmap caller (based on curthread) in the list of
11159 11159 * callers. If it is found, we remove it and free the delmap caller.
11160 11160 * Returns:
11161 11161 * 0 if the caller wasn't found
11162 11162 * 1 if the caller was found, removed and freed. *errp will be set
11163 11163 * to what the result of the delmap was.
11164 11164 */
11165 11165 static int
11166 11166 nfs4_find_and_delete_delmapcall(rnode4_t *rp, int *errp)
11167 11167 {
11168 11168 nfs4_delmapcall_t *delmap_call;
11169 11169
11170 11170 /*
11171 11171 * If the list doesn't exist yet, we create it and return
11172 11172 * that the caller wasn't found. No list = no callers.
11173 11173 */
11174 11174 mutex_enter(&rp->r_statelock);
11175 11175 if (!(rp->r_flags & R4DELMAPLIST)) {
11176 11176 /* The list does not exist */
11177 11177 list_create(&rp->r_indelmap, sizeof (nfs4_delmapcall_t),
11178 11178 offsetof(nfs4_delmapcall_t, call_node));
11179 11179 rp->r_flags |= R4DELMAPLIST;
11180 11180 mutex_exit(&rp->r_statelock);
11181 11181 return (0);
11182 11182 } else {
11183 11183 /* The list exists so search it */
11184 11184 for (delmap_call = list_head(&rp->r_indelmap);
11185 11185 delmap_call != NULL;
11186 11186 delmap_call = list_next(&rp->r_indelmap, delmap_call)) {
11187 11187 if (delmap_call->call_id == curthread) {
11188 11188 /* current caller is in the list */
11189 11189 *errp = delmap_call->error;
11190 11190 list_remove(&rp->r_indelmap, delmap_call);
11191 11191 mutex_exit(&rp->r_statelock);
11192 11192 nfs4_free_delmapcall(delmap_call);
11193 11193 return (1);
11194 11194 }
11195 11195 }
11196 11196 }
11197 11197 mutex_exit(&rp->r_statelock);
11198 11198 return (0);
11199 11199 }
11200 11200
11201 11201 /*
11202 11202 * Remove some pages from an mmap'd vnode. Just update the
11203 11203 * count of pages. If doing close-to-open, then flush and
11204 11204 * commit all of the pages associated with this file.
11205 11205 * Otherwise, start an asynchronous page flush to write out
11206 11206 * any dirty pages. This will also associate a credential
11207 11207 * with the rnode which can be used to write the pages.
11208 11208 */
11209 11209 /* ARGSUSED */
11210 11210 static void
11211 11211 nfs4_delmap_callback(struct as *as, void *arg, uint_t event)
11212 11212 {
11213 11213 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
11214 11214 rnode4_t *rp;
11215 11215 mntinfo4_t *mi;
11216 11216 nfs4_delmap_args_t *dmapp = (nfs4_delmap_args_t *)arg;
11217 11217
11218 11218 rp = VTOR4(dmapp->vp);
11219 11219 mi = VTOMI4(dmapp->vp);
11220 11220
11221 11221 atomic_add_long((ulong_t *)&rp->r_mapcnt, -btopr(dmapp->len));
11222 11222 ASSERT(rp->r_mapcnt >= 0);
11223 11223
11224 11224 /*
11225 11225 * Initiate a page flush and potential commit if there are
11226 11226 * pages, the file system was not mounted readonly, the segment
11227 11227 * was mapped shared, and the pages themselves were writeable.
11228 11228 */
11229 11229 if (nfs4_has_pages(dmapp->vp) &&
11230 11230 !(dmapp->vp->v_vfsp->vfs_flag & VFS_RDONLY) &&
11231 11231 dmapp->flags == MAP_SHARED && (dmapp->maxprot & PROT_WRITE)) {
11232 11232 mutex_enter(&rp->r_statelock);
11233 11233 rp->r_flags |= R4DIRTY;
11234 11234 mutex_exit(&rp->r_statelock);
11235 11235 e.error = nfs4_putpage_commit(dmapp->vp, dmapp->off,
11236 11236 dmapp->len, dmapp->cr);
11237 11237 if (!e.error) {
11238 11238 mutex_enter(&rp->r_statelock);
11239 11239 e.error = rp->r_error;
11240 11240 rp->r_error = 0;
11241 11241 mutex_exit(&rp->r_statelock);
11242 11242 }
11243 11243 } else
11244 11244 e.error = 0;
11245 11245
11246 11246 if ((rp->r_flags & R4DIRECTIO) || (mi->mi_flags & MI4_DIRECTIO))
11247 11247 (void) nfs4_putpage(dmapp->vp, dmapp->off, dmapp->len,
11248 11248 B_INVAL, dmapp->cr, NULL);
11249 11249
11250 11250 if (e.error) {
11251 11251 e.stat = puterrno4(e.error);
11252 11252 nfs4_queue_fact(RF_DELMAP_CB_ERR, mi, e.stat, 0,
11253 11253 OP_COMMIT, FALSE, NULL, 0, dmapp->vp);
11254 11254 dmapp->caller->error = e.error;
11255 11255 }
11256 11256
11257 11257 /* Check to see if we need to close the file */
11258 11258
11259 11259 if (dmapp->vp->v_type == VREG) {
11260 11260 nfs4close_one(dmapp->vp, NULL, dmapp->cr, 0, NULL, &e,
11261 11261 CLOSE_DELMAP, dmapp->len, dmapp->maxprot, dmapp->flags);
11262 11262
11263 11263 if (e.error != 0 || e.stat != NFS4_OK) {
11264 11264 /*
11265 11265 * Since it is possible that e.error == 0 and
11266 11266 * e.stat != NFS4_OK (and vice versa),
11267 11267 * we do the proper checking in order to get both
11268 11268 * e.error and e.stat reporting the correct info.
11269 11269 */
11270 11270 if (e.stat == NFS4_OK)
11271 11271 e.stat = puterrno4(e.error);
11272 11272 if (e.error == 0)
11273 11273 e.error = geterrno4(e.stat);
11274 11274
11275 11275 nfs4_queue_fact(RF_DELMAP_CB_ERR, mi, e.stat, 0,
11276 11276 OP_CLOSE, FALSE, NULL, 0, dmapp->vp);
11277 11277 dmapp->caller->error = e.error;
11278 11278 }
11279 11279 }
11280 11280
11281 11281 (void) as_delete_callback(as, arg);
11282 11282 kmem_free(dmapp, sizeof (nfs4_delmap_args_t));
11283 11283 }
11284 11284
11285 11285
11286 11286 static uint_t
11287 11287 fattr4_maxfilesize_to_bits(uint64_t ll)
11288 11288 {
11289 11289 uint_t l = 1;
11290 11290
11291 11291 if (ll == 0) {
11292 11292 return (0);
11293 11293 }
11294 11294
11295 11295 if (ll & 0xffffffff00000000) {
11296 11296 l += 32; ll >>= 32;
11297 11297 }
11298 11298 if (ll & 0xffff0000) {
11299 11299 l += 16; ll >>= 16;
11300 11300 }
11301 11301 if (ll & 0xff00) {
11302 11302 l += 8; ll >>= 8;
11303 11303 }
11304 11304 if (ll & 0xf0) {
11305 11305 l += 4; ll >>= 4;
11306 11306 }
11307 11307 if (ll & 0xc) {
11308 11308 l += 2; ll >>= 2;
11309 11309 }
11310 11310 if (ll & 0x2) {
11311 11311 l += 1;
11312 11312 }
11313 11313 return (l);
11314 11314 }
11315 11315
11316 11316 static int
11317 11317 nfs4_have_xattrs(vnode_t *vp, ulong_t *valp, cred_t *cr)
11318 11318 {
11319 11319 vnode_t *avp = NULL;
11320 11320 int error;
11321 11321
11322 11322 if ((error = nfs4lookup_xattr(vp, "", &avp,
11323 11323 LOOKUP_XATTR, cr)) == 0)
11324 11324 error = do_xattr_exists_check(avp, valp, cr);
11325 11325 if (avp)
11326 11326 VN_RELE(avp);
11327 11327
11328 11328 return (error);
11329 11329 }
11330 11330
11331 11331 /* ARGSUSED */
11332 11332 int
11333 11333 nfs4_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
11334 11334 caller_context_t *ct)
11335 11335 {
11336 11336 int error;
11337 11337 hrtime_t t;
11338 11338 rnode4_t *rp;
11339 11339 nfs4_ga_res_t gar;
11340 11340 nfs4_ga_ext_res_t ger;
11341 11341
11342 11342 gar.n4g_ext_res = &ger;
11343 11343
11344 11344 if (nfs_zone() != VTOMI4(vp)->mi_zone)
11345 11345 return (EIO);
11346 11346 if (cmd == _PC_PATH_MAX || cmd == _PC_SYMLINK_MAX) {
11347 11347 *valp = MAXPATHLEN;
11348 11348 return (0);
11349 11349 }
11350 11350 if (cmd == _PC_ACL_ENABLED) {
11351 11351 *valp = _ACL_ACE_ENABLED;
11352 11352 return (0);
11353 11353 }
11354 11354
11355 11355 rp = VTOR4(vp);
11356 11356 if (cmd == _PC_XATTR_EXISTS) {
11357 11357 /*
11358 11358 * The existence of the xattr directory is not sufficient
11359 11359 * for determining whether generic user attributes exists.
11360 11360 * The attribute directory could only be a transient directory
11361 11361 * used for Solaris sysattr support. Do a small readdir
11362 11362 * to verify if the only entries are sysattrs or not.
11363 11363 *
11364 11364 * pc4_xattr_valid can be only be trusted when r_xattr_dir
11365 11365 * is NULL. Once the xadir vp exists, we can create xattrs,
11366 11366 * and we don't have any way to update the "base" object's
11367 11367 * pc4_xattr_exists from the xattr or xadir. Maybe FEM
11368 11368 * could help out.
11369 11369 */
11370 11370 if (ATTRCACHE4_VALID(vp) && rp->r_pathconf.pc4_xattr_valid &&
11371 11371 rp->r_xattr_dir == NULL) {
11372 11372 return (nfs4_have_xattrs(vp, valp, cr));
11373 11373 }
11374 11374 } else { /* OLD CODE */
11375 11375 if (ATTRCACHE4_VALID(vp)) {
11376 11376 mutex_enter(&rp->r_statelock);
11377 11377 if (rp->r_pathconf.pc4_cache_valid) {
11378 11378 error = 0;
11379 11379 switch (cmd) {
11380 11380 case _PC_FILESIZEBITS:
11381 11381 *valp =
11382 11382 rp->r_pathconf.pc4_filesizebits;
11383 11383 break;
11384 11384 case _PC_LINK_MAX:
11385 11385 *valp =
11386 11386 rp->r_pathconf.pc4_link_max;
11387 11387 break;
11388 11388 case _PC_NAME_MAX:
11389 11389 *valp =
11390 11390 rp->r_pathconf.pc4_name_max;
11391 11391 break;
11392 11392 case _PC_CHOWN_RESTRICTED:
11393 11393 *valp =
11394 11394 rp->r_pathconf.pc4_chown_restricted;
11395 11395 break;
11396 11396 case _PC_NO_TRUNC:
11397 11397 *valp =
11398 11398 rp->r_pathconf.pc4_no_trunc;
11399 11399 break;
11400 11400 default:
11401 11401 error = EINVAL;
11402 11402 break;
11403 11403 }
11404 11404 mutex_exit(&rp->r_statelock);
11405 11405 #ifdef DEBUG
11406 11406 nfs4_pathconf_cache_hits++;
11407 11407 #endif
11408 11408 return (error);
11409 11409 }
11410 11410 mutex_exit(&rp->r_statelock);
11411 11411 }
11412 11412 }
11413 11413 #ifdef DEBUG
11414 11414 nfs4_pathconf_cache_misses++;
11415 11415 #endif
11416 11416
11417 11417 t = gethrtime();
11418 11418
11419 11419 error = nfs4_attr_otw(vp, TAG_PATHCONF, &gar, NFS4_PATHCONF_MASK, cr);
11420 11420
11421 11421 if (error) {
11422 11422 mutex_enter(&rp->r_statelock);
11423 11423 rp->r_pathconf.pc4_cache_valid = FALSE;
11424 11424 rp->r_pathconf.pc4_xattr_valid = FALSE;
11425 11425 mutex_exit(&rp->r_statelock);
11426 11426 return (error);
11427 11427 }
11428 11428
11429 11429 /* interpret the max filesize */
11430 11430 gar.n4g_ext_res->n4g_pc4.pc4_filesizebits =
11431 11431 fattr4_maxfilesize_to_bits(gar.n4g_ext_res->n4g_maxfilesize);
11432 11432
11433 11433 /* Store the attributes we just received */
11434 11434 nfs4_attr_cache(vp, &gar, t, cr, TRUE, NULL);
11435 11435
11436 11436 switch (cmd) {
11437 11437 case _PC_FILESIZEBITS:
11438 11438 *valp = gar.n4g_ext_res->n4g_pc4.pc4_filesizebits;
11439 11439 break;
11440 11440 case _PC_LINK_MAX:
11441 11441 *valp = gar.n4g_ext_res->n4g_pc4.pc4_link_max;
11442 11442 break;
11443 11443 case _PC_NAME_MAX:
11444 11444 *valp = gar.n4g_ext_res->n4g_pc4.pc4_name_max;
11445 11445 break;
11446 11446 case _PC_CHOWN_RESTRICTED:
11447 11447 *valp = gar.n4g_ext_res->n4g_pc4.pc4_chown_restricted;
11448 11448 break;
11449 11449 case _PC_NO_TRUNC:
11450 11450 *valp = gar.n4g_ext_res->n4g_pc4.pc4_no_trunc;
11451 11451 break;
11452 11452 case _PC_XATTR_EXISTS:
11453 11453 if (gar.n4g_ext_res->n4g_pc4.pc4_xattr_exists) {
11454 11454 if (error = nfs4_have_xattrs(vp, valp, cr))
11455 11455 return (error);
11456 11456 }
11457 11457 break;
11458 11458 default:
11459 11459 return (EINVAL);
11460 11460 }
11461 11461
11462 11462 return (0);
11463 11463 }
11464 11464
11465 11465 /*
11466 11466 * Called by async thread to do synchronous pageio. Do the i/o, wait
11467 11467 * for it to complete, and cleanup the page list when done.
11468 11468 */
11469 11469 static int
11470 11470 nfs4_sync_pageio(vnode_t *vp, page_t *pp, u_offset_t io_off, size_t io_len,
11471 11471 int flags, cred_t *cr)
11472 11472 {
11473 11473 int error;
11474 11474
11475 11475 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
11476 11476
11477 11477 error = nfs4_rdwrlbn(vp, pp, io_off, io_len, flags, cr);
11478 11478 if (flags & B_READ)
11479 11479 pvn_read_done(pp, (error ? B_ERROR : 0) | flags);
11480 11480 else
11481 11481 pvn_write_done(pp, (error ? B_ERROR : 0) | flags);
11482 11482 return (error);
11483 11483 }
11484 11484
11485 11485 /* ARGSUSED */
11486 11486 static int
11487 11487 nfs4_pageio(vnode_t *vp, page_t *pp, u_offset_t io_off, size_t io_len,
11488 11488 int flags, cred_t *cr, caller_context_t *ct)
11489 11489 {
11490 11490 int error;
11491 11491 rnode4_t *rp;
11492 11492
11493 11493 if (!(flags & B_ASYNC) && nfs_zone() != VTOMI4(vp)->mi_zone)
11494 11494 return (EIO);
11495 11495
11496 11496 if (pp == NULL)
11497 11497 return (EINVAL);
11498 11498
11499 11499 rp = VTOR4(vp);
11500 11500 mutex_enter(&rp->r_statelock);
11501 11501 rp->r_count++;
11502 11502 mutex_exit(&rp->r_statelock);
11503 11503
11504 11504 if (flags & B_ASYNC) {
11505 11505 error = nfs4_async_pageio(vp, pp, io_off, io_len, flags, cr,
11506 11506 nfs4_sync_pageio);
11507 11507 } else
11508 11508 error = nfs4_rdwrlbn(vp, pp, io_off, io_len, flags, cr);
11509 11509 mutex_enter(&rp->r_statelock);
11510 11510 rp->r_count--;
11511 11511 cv_broadcast(&rp->r_cv);
11512 11512 mutex_exit(&rp->r_statelock);
11513 11513 return (error);
11514 11514 }
11515 11515
11516 11516 /* ARGSUSED */
11517 11517 static void
11518 11518 nfs4_dispose(vnode_t *vp, page_t *pp, int fl, int dn, cred_t *cr,
11519 11519 caller_context_t *ct)
11520 11520 {
11521 11521 int error;
11522 11522 rnode4_t *rp;
11523 11523 page_t *plist;
11524 11524 page_t *pptr;
11525 11525 offset3 offset;
11526 11526 count3 len;
11527 11527 k_sigset_t smask;
11528 11528
11529 11529 /*
11530 11530 * We should get called with fl equal to either B_FREE or
11531 11531 * B_INVAL. Any other value is illegal.
11532 11532 *
11533 11533 * The page that we are either supposed to free or destroy
11534 11534 * should be exclusive locked and its io lock should not
11535 11535 * be held.
11536 11536 */
11537 11537 ASSERT(fl == B_FREE || fl == B_INVAL);
11538 11538 ASSERT((PAGE_EXCL(pp) && !page_iolock_assert(pp)) || panicstr);
11539 11539
11540 11540 rp = VTOR4(vp);
11541 11541
11542 11542 /*
11543 11543 * If the page doesn't need to be committed or we shouldn't
11544 11544 * even bother attempting to commit it, then just make sure
11545 11545 * that the p_fsdata byte is clear and then either free or
11546 11546 * destroy the page as appropriate.
11547 11547 */
11548 11548 if (pp->p_fsdata == C_NOCOMMIT || (rp->r_flags & R4STALE)) {
11549 11549 pp->p_fsdata = C_NOCOMMIT;
11550 11550 if (fl == B_FREE)
11551 11551 page_free(pp, dn);
11552 11552 else
11553 11553 page_destroy(pp, dn);
11554 11554 return;
11555 11555 }
11556 11556
11557 11557 /*
11558 11558 * If there is a page invalidation operation going on, then
11559 11559 * if this is one of the pages being destroyed, then just
11560 11560 * clear the p_fsdata byte and then either free or destroy
11561 11561 * the page as appropriate.
11562 11562 */
11563 11563 mutex_enter(&rp->r_statelock);
11564 11564 if ((rp->r_flags & R4TRUNCATE) && pp->p_offset >= rp->r_truncaddr) {
11565 11565 mutex_exit(&rp->r_statelock);
11566 11566 pp->p_fsdata = C_NOCOMMIT;
11567 11567 if (fl == B_FREE)
11568 11568 page_free(pp, dn);
11569 11569 else
11570 11570 page_destroy(pp, dn);
11571 11571 return;
11572 11572 }
11573 11573
11574 11574 /*
11575 11575 * If we are freeing this page and someone else is already
11576 11576 * waiting to do a commit, then just unlock the page and
11577 11577 * return. That other thread will take care of commiting
11578 11578 * this page. The page can be freed sometime after the
11579 11579 * commit has finished. Otherwise, if the page is marked
11580 11580 * as delay commit, then we may be getting called from
11581 11581 * pvn_write_done, one page at a time. This could result
11582 11582 * in one commit per page, so we end up doing lots of small
11583 11583 * commits instead of fewer larger commits. This is bad,
11584 11584 * we want do as few commits as possible.
11585 11585 */
11586 11586 if (fl == B_FREE) {
11587 11587 if (rp->r_flags & R4COMMITWAIT) {
11588 11588 page_unlock(pp);
11589 11589 mutex_exit(&rp->r_statelock);
11590 11590 return;
11591 11591 }
11592 11592 if (pp->p_fsdata == C_DELAYCOMMIT) {
11593 11593 pp->p_fsdata = C_COMMIT;
11594 11594 page_unlock(pp);
11595 11595 mutex_exit(&rp->r_statelock);
11596 11596 return;
11597 11597 }
11598 11598 }
11599 11599
11600 11600 /*
11601 11601 * Check to see if there is a signal which would prevent an
11602 11602 * attempt to commit the pages from being successful. If so,
11603 11603 * then don't bother with all of the work to gather pages and
11604 11604 * generate the unsuccessful RPC. Just return from here and
11605 11605 * let the page be committed at some later time.
11606 11606 */
11607 11607 sigintr(&smask, VTOMI4(vp)->mi_flags & MI4_INT);
11608 11608 if (ttolwp(curthread) != NULL && ISSIG(curthread, JUSTLOOKING)) {
11609 11609 sigunintr(&smask);
11610 11610 page_unlock(pp);
11611 11611 mutex_exit(&rp->r_statelock);
11612 11612 return;
11613 11613 }
11614 11614 sigunintr(&smask);
11615 11615
11616 11616 /*
11617 11617 * We are starting to need to commit pages, so let's try
11618 11618 * to commit as many as possible at once to reduce the
11619 11619 * overhead.
11620 11620 *
11621 11621 * Set the `commit inprogress' state bit. We must
11622 11622 * first wait until any current one finishes. Then
11623 11623 * we initialize the c_pages list with this page.
11624 11624 */
11625 11625 while (rp->r_flags & R4COMMIT) {
11626 11626 rp->r_flags |= R4COMMITWAIT;
11627 11627 cv_wait(&rp->r_commit.c_cv, &rp->r_statelock);
11628 11628 rp->r_flags &= ~R4COMMITWAIT;
11629 11629 }
11630 11630 rp->r_flags |= R4COMMIT;
11631 11631 mutex_exit(&rp->r_statelock);
11632 11632 ASSERT(rp->r_commit.c_pages == NULL);
11633 11633 rp->r_commit.c_pages = pp;
11634 11634 rp->r_commit.c_commbase = (offset3)pp->p_offset;
11635 11635 rp->r_commit.c_commlen = PAGESIZE;
11636 11636
11637 11637 /*
11638 11638 * Gather together all other pages which can be committed.
11639 11639 * They will all be chained off r_commit.c_pages.
11640 11640 */
11641 11641 nfs4_get_commit(vp);
11642 11642
11643 11643 /*
11644 11644 * Clear the `commit inprogress' status and disconnect
11645 11645 * the list of pages to be committed from the rnode.
11646 11646 * At this same time, we also save the starting offset
11647 11647 * and length of data to be committed on the server.
11648 11648 */
11649 11649 plist = rp->r_commit.c_pages;
11650 11650 rp->r_commit.c_pages = NULL;
11651 11651 offset = rp->r_commit.c_commbase;
11652 11652 len = rp->r_commit.c_commlen;
11653 11653 mutex_enter(&rp->r_statelock);
11654 11654 rp->r_flags &= ~R4COMMIT;
11655 11655 cv_broadcast(&rp->r_commit.c_cv);
11656 11656 mutex_exit(&rp->r_statelock);
11657 11657
11658 11658 if (curproc == proc_pageout || curproc == proc_fsflush ||
11659 11659 nfs_zone() != VTOMI4(vp)->mi_zone) {
11660 11660 nfs4_async_commit(vp, plist, offset, len,
11661 11661 cr, do_nfs4_async_commit);
11662 11662 return;
11663 11663 }
11664 11664
11665 11665 /*
11666 11666 * Actually generate the COMMIT op over the wire operation.
11667 11667 */
11668 11668 error = nfs4_commit(vp, (offset4)offset, (count4)len, cr);
11669 11669
11670 11670 /*
11671 11671 * If we got an error during the commit, just unlock all
11672 11672 * of the pages. The pages will get retransmitted to the
11673 11673 * server during a putpage operation.
11674 11674 */
11675 11675 if (error) {
11676 11676 while (plist != NULL) {
11677 11677 pptr = plist;
11678 11678 page_sub(&plist, pptr);
11679 11679 page_unlock(pptr);
11680 11680 }
11681 11681 return;
11682 11682 }
11683 11683
11684 11684 /*
11685 11685 * We've tried as hard as we can to commit the data to stable
11686 11686 * storage on the server. We just unlock the rest of the pages
11687 11687 * and clear the commit required state. They will be put
11688 11688 * onto the tail of the cachelist if they are nolonger
11689 11689 * mapped.
11690 11690 */
11691 11691 while (plist != pp) {
11692 11692 pptr = plist;
11693 11693 page_sub(&plist, pptr);
11694 11694 pptr->p_fsdata = C_NOCOMMIT;
11695 11695 page_unlock(pptr);
11696 11696 }
11697 11697
11698 11698 /*
11699 11699 * It is possible that nfs4_commit didn't return error but
11700 11700 * some other thread has modified the page we are going
11701 11701 * to free/destroy.
11702 11702 * In this case we need to rewrite the page. Do an explicit check
11703 11703 * before attempting to free/destroy the page. If modified, needs to
11704 11704 * be rewritten so unlock the page and return.
11705 11705 */
11706 11706 if (hat_ismod(pp)) {
11707 11707 pp->p_fsdata = C_NOCOMMIT;
11708 11708 page_unlock(pp);
11709 11709 return;
11710 11710 }
11711 11711
11712 11712 /*
11713 11713 * Now, as appropriate, either free or destroy the page
11714 11714 * that we were called with.
11715 11715 */
11716 11716 pp->p_fsdata = C_NOCOMMIT;
11717 11717 if (fl == B_FREE)
11718 11718 page_free(pp, dn);
11719 11719 else
11720 11720 page_destroy(pp, dn);
11721 11721 }
11722 11722
11723 11723 /*
11724 11724 * Commit requires that the current fh be the file written to.
11725 11725 * The compound op structure is:
11726 11726 * PUTFH(file), COMMIT
11727 11727 */
11728 11728 static int
11729 11729 nfs4_commit(vnode_t *vp, offset4 offset, count4 count, cred_t *cr)
11730 11730 {
11731 11731 COMPOUND4args_clnt args;
11732 11732 COMPOUND4res_clnt res;
11733 11733 COMMIT4res *cm_res;
11734 11734 nfs_argop4 argop[2];
11735 11735 nfs_resop4 *resop;
11736 11736 int doqueue;
11737 11737 mntinfo4_t *mi;
11738 11738 rnode4_t *rp;
11739 11739 cred_t *cred_otw = NULL;
11740 11740 bool_t needrecov = FALSE;
11741 11741 nfs4_recov_state_t recov_state;
11742 11742 nfs4_open_stream_t *osp = NULL;
11743 11743 bool_t first_time = TRUE; /* first time getting OTW cred */
11744 11744 bool_t last_time = FALSE; /* last time getting OTW cred */
11745 11745 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
11746 11746
11747 11747 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
11748 11748
11749 11749 rp = VTOR4(vp);
11750 11750
11751 11751 mi = VTOMI4(vp);
11752 11752 recov_state.rs_flags = 0;
11753 11753 recov_state.rs_num_retry_despite_err = 0;
11754 11754 get_commit_cred:
11755 11755 /*
11756 11756 * Releases the osp, if a valid open stream is provided.
11757 11757 * Puts a hold on the cred_otw and the new osp (if found).
11758 11758 */
11759 11759 cred_otw = nfs4_get_otw_cred_by_osp(rp, cr, &osp,
11760 11760 &first_time, &last_time);
11761 11761 args.ctag = TAG_COMMIT;
11762 11762 recov_retry:
11763 11763 /*
11764 11764 * Commit ops: putfh file; commit
11765 11765 */
11766 11766 args.array_len = 2;
11767 11767 args.array = argop;
11768 11768
11769 11769 e.error = nfs4_start_fop(VTOMI4(vp), vp, NULL, OH_COMMIT,
11770 11770 &recov_state, NULL);
11771 11771 if (e.error) {
11772 11772 crfree(cred_otw);
11773 11773 if (osp != NULL)
11774 11774 open_stream_rele(osp, rp);
11775 11775 return (e.error);
11776 11776 }
11777 11777
11778 11778 /* putfh directory */
11779 11779 argop[0].argop = OP_CPUTFH;
11780 11780 argop[0].nfs_argop4_u.opcputfh.sfh = rp->r_fh;
11781 11781
11782 11782 /* commit */
11783 11783 argop[1].argop = OP_COMMIT;
11784 11784 argop[1].nfs_argop4_u.opcommit.offset = offset;
11785 11785 argop[1].nfs_argop4_u.opcommit.count = count;
11786 11786
11787 11787 doqueue = 1;
11788 11788 rfs4call(mi, &args, &res, cred_otw, &doqueue, 0, &e);
11789 11789
11790 11790 needrecov = nfs4_needs_recovery(&e, FALSE, mi->mi_vfsp);
11791 11791 if (!needrecov && e.error) {
11792 11792 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_COMMIT, &recov_state,
11793 11793 needrecov);
11794 11794 crfree(cred_otw);
11795 11795 if (e.error == EACCES && last_time == FALSE)
11796 11796 goto get_commit_cred;
11797 11797 if (osp != NULL)
11798 11798 open_stream_rele(osp, rp);
11799 11799 return (e.error);
11800 11800 }
11801 11801
11802 11802 if (needrecov) {
11803 11803 if (nfs4_start_recovery(&e, VTOMI4(vp), vp, NULL, NULL,
11804 11804 NULL, OP_COMMIT, NULL, NULL, NULL) == FALSE) {
11805 11805 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_COMMIT,
11806 11806 &recov_state, needrecov);
11807 11807 if (!e.error)
11808 11808 (void) xdr_free(xdr_COMPOUND4res_clnt,
11809 11809 (caddr_t)&res);
11810 11810 goto recov_retry;
11811 11811 }
11812 11812 if (e.error) {
11813 11813 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_COMMIT,
11814 11814 &recov_state, needrecov);
11815 11815 crfree(cred_otw);
11816 11816 if (osp != NULL)
11817 11817 open_stream_rele(osp, rp);
11818 11818 return (e.error);
11819 11819 }
11820 11820 /* fall through for res.status case */
11821 11821 }
11822 11822
11823 11823 if (res.status) {
11824 11824 e.error = geterrno4(res.status);
11825 11825 if (e.error == EACCES && last_time == FALSE) {
11826 11826 crfree(cred_otw);
11827 11827 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_COMMIT,
11828 11828 &recov_state, needrecov);
11829 11829 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
11830 11830 goto get_commit_cred;
11831 11831 }
11832 11832 /*
11833 11833 * Can't do a nfs4_purge_stale_fh here because this
11834 11834 * can cause a deadlock. nfs4_commit can
11835 11835 * be called from nfs4_dispose which can be called
11836 11836 * indirectly via pvn_vplist_dirty. nfs4_purge_stale_fh
11837 11837 * can call back to pvn_vplist_dirty.
11838 11838 */
11839 11839 if (e.error == ESTALE) {
11840 11840 mutex_enter(&rp->r_statelock);
11841 11841 rp->r_flags |= R4STALE;
11842 11842 if (!rp->r_error)
11843 11843 rp->r_error = e.error;
11844 11844 mutex_exit(&rp->r_statelock);
11845 11845 PURGE_ATTRCACHE4(vp);
11846 11846 } else {
11847 11847 mutex_enter(&rp->r_statelock);
11848 11848 if (!rp->r_error)
11849 11849 rp->r_error = e.error;
11850 11850 mutex_exit(&rp->r_statelock);
11851 11851 }
11852 11852 } else {
11853 11853 ASSERT(rp->r_flags & R4HAVEVERF);
11854 11854 resop = &res.array[1]; /* commit res */
11855 11855 cm_res = &resop->nfs_resop4_u.opcommit;
11856 11856 mutex_enter(&rp->r_statelock);
11857 11857 if (cm_res->writeverf == rp->r_writeverf) {
11858 11858 mutex_exit(&rp->r_statelock);
11859 11859 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
11860 11860 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_COMMIT,
11861 11861 &recov_state, needrecov);
11862 11862 crfree(cred_otw);
11863 11863 if (osp != NULL)
11864 11864 open_stream_rele(osp, rp);
11865 11865 return (0);
11866 11866 }
11867 11867 nfs4_set_mod(vp);
11868 11868 rp->r_writeverf = cm_res->writeverf;
11869 11869 mutex_exit(&rp->r_statelock);
11870 11870 e.error = NFS_VERF_MISMATCH;
11871 11871 }
11872 11872
11873 11873 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
11874 11874 nfs4_end_fop(VTOMI4(vp), vp, NULL, OH_COMMIT, &recov_state, needrecov);
11875 11875 crfree(cred_otw);
11876 11876 if (osp != NULL)
11877 11877 open_stream_rele(osp, rp);
11878 11878
11879 11879 return (e.error);
11880 11880 }
11881 11881
11882 11882 static void
11883 11883 nfs4_set_mod(vnode_t *vp)
11884 11884 {
11885 11885 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
11886 11886
11887 11887 /* make sure we're looking at the master vnode, not a shadow */
11888 11888 pvn_vplist_setdirty(RTOV4(VTOR4(vp)), nfs_setmod_check);
11889 11889 }
11890 11890
11891 11891 /*
11892 11892 * This function is used to gather a page list of the pages which
11893 11893 * can be committed on the server.
11894 11894 *
11895 11895 * The calling thread must have set R4COMMIT. This bit is used to
11896 11896 * serialize access to the commit structure in the rnode. As long
11897 11897 * as the thread has set R4COMMIT, then it can manipulate the commit
11898 11898 * structure without requiring any other locks.
11899 11899 *
11900 11900 * When this function is called from nfs4_dispose() the page passed
11901 11901 * into nfs4_dispose() will be SE_EXCL locked, and so this function
11902 11902 * will skip it. This is not a problem since we initially add the
11903 11903 * page to the r_commit page list.
11904 11904 *
11905 11905 */
11906 11906 static void
11907 11907 nfs4_get_commit(vnode_t *vp)
11908 11908 {
11909 11909 rnode4_t *rp;
11910 11910 page_t *pp;
11911 11911 kmutex_t *vphm;
11912 11912
11913 11913 rp = VTOR4(vp);
11914 11914
11915 11915 ASSERT(rp->r_flags & R4COMMIT);
11916 11916
11917 11917 /* make sure we're looking at the master vnode, not a shadow */
11918 11918
11919 11919 if (IS_SHADOW(vp, rp))
11920 11920 vp = RTOV4(rp);
11921 11921
11922 11922 vphm = page_vnode_mutex(vp);
11923 11923 mutex_enter(vphm);
11924 11924
11925 11925 /*
11926 11926 * If there are no pages associated with this vnode, then
11927 11927 * just return.
11928 11928 */
11929 11929 if ((pp = vp->v_pages) == NULL) {
11930 11930 mutex_exit(vphm);
11931 11931 return;
11932 11932 }
11933 11933
11934 11934 /*
11935 11935 * Step through all of the pages associated with this vnode
11936 11936 * looking for pages which need to be committed.
11937 11937 */
11938 11938 do {
11939 11939 /* Skip marker pages. */
11940 11940 if (pp->p_hash == PVN_VPLIST_HASH_TAG)
11941 11941 continue;
11942 11942
11943 11943 /*
11944 11944 * First short-cut everything (without the page_lock)
11945 11945 * and see if this page does not need to be committed
11946 11946 * or is modified if so then we'll just skip it.
11947 11947 */
11948 11948 if (pp->p_fsdata == C_NOCOMMIT || hat_ismod(pp))
11949 11949 continue;
11950 11950
11951 11951 /*
11952 11952 * Attempt to lock the page. If we can't, then
11953 11953 * someone else is messing with it or we have been
11954 11954 * called from nfs4_dispose and this is the page that
11955 11955 * nfs4_dispose was called with.. anyway just skip it.
11956 11956 */
11957 11957 if (!page_trylock(pp, SE_EXCL))
11958 11958 continue;
11959 11959
11960 11960 /*
11961 11961 * Lets check again now that we have the page lock.
11962 11962 */
11963 11963 if (pp->p_fsdata == C_NOCOMMIT || hat_ismod(pp)) {
11964 11964 page_unlock(pp);
11965 11965 continue;
11966 11966 }
11967 11967
11968 11968 /* this had better not be a free page */
11969 11969 ASSERT(PP_ISFREE(pp) == 0);
11970 11970
11971 11971 /*
11972 11972 * The page needs to be committed and we locked it.
11973 11973 * Update the base and length parameters and add it
11974 11974 * to r_pages.
11975 11975 */
11976 11976 if (rp->r_commit.c_pages == NULL) {
11977 11977 rp->r_commit.c_commbase = (offset3)pp->p_offset;
11978 11978 rp->r_commit.c_commlen = PAGESIZE;
11979 11979 } else if (pp->p_offset < rp->r_commit.c_commbase) {
11980 11980 rp->r_commit.c_commlen = rp->r_commit.c_commbase -
11981 11981 (offset3)pp->p_offset + rp->r_commit.c_commlen;
11982 11982 rp->r_commit.c_commbase = (offset3)pp->p_offset;
11983 11983 } else if ((rp->r_commit.c_commbase + rp->r_commit.c_commlen)
11984 11984 <= pp->p_offset) {
11985 11985 rp->r_commit.c_commlen = (offset3)pp->p_offset -
11986 11986 rp->r_commit.c_commbase + PAGESIZE;
11987 11987 }
11988 11988 page_add(&rp->r_commit.c_pages, pp);
11989 11989 } while ((pp = pp->p_vpnext) != vp->v_pages);
11990 11990
11991 11991 mutex_exit(vphm);
11992 11992 }
11993 11993
11994 11994 /*
11995 11995 * This routine is used to gather together a page list of the pages
11996 11996 * which are to be committed on the server. This routine must not
11997 11997 * be called if the calling thread holds any locked pages.
11998 11998 *
11999 11999 * The calling thread must have set R4COMMIT. This bit is used to
12000 12000 * serialize access to the commit structure in the rnode. As long
12001 12001 * as the thread has set R4COMMIT, then it can manipulate the commit
12002 12002 * structure without requiring any other locks.
12003 12003 */
12004 12004 static void
12005 12005 nfs4_get_commit_range(vnode_t *vp, u_offset_t soff, size_t len)
12006 12006 {
12007 12007
12008 12008 rnode4_t *rp;
12009 12009 page_t *pp;
12010 12010 u_offset_t end;
12011 12011 u_offset_t off;
12012 12012 ASSERT(len != 0);
12013 12013 rp = VTOR4(vp);
12014 12014 ASSERT(rp->r_flags & R4COMMIT);
12015 12015
12016 12016 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
12017 12017
12018 12018 /* make sure we're looking at the master vnode, not a shadow */
12019 12019
12020 12020 if (IS_SHADOW(vp, rp))
12021 12021 vp = RTOV4(rp);
12022 12022
12023 12023 /*
12024 12024 * If there are no pages associated with this vnode, then
12025 12025 * just return.
12026 12026 */
12027 12027 if ((pp = vp->v_pages) == NULL)
12028 12028 return;
12029 12029 /*
12030 12030 * Calculate the ending offset.
12031 12031 */
12032 12032 end = soff + len;
12033 12033 for (off = soff; off < end; off += PAGESIZE) {
12034 12034 /*
12035 12035 * Lookup each page by vp, offset.
12036 12036 */
12037 12037 if ((pp = page_lookup_nowait(vp, off, SE_EXCL)) == NULL)
12038 12038 continue;
12039 12039 /*
12040 12040 * If this page does not need to be committed or is
12041 12041 * modified, then just skip it.
12042 12042 */
12043 12043 if (pp->p_fsdata == C_NOCOMMIT || hat_ismod(pp)) {
12044 12044 page_unlock(pp);
12045 12045 continue;
12046 12046 }
12047 12047
12048 12048 ASSERT(PP_ISFREE(pp) == 0);
12049 12049 /*
12050 12050 * The page needs to be committed and we locked it.
12051 12051 * Update the base and length parameters and add it
12052 12052 * to r_pages.
12053 12053 */
12054 12054 if (rp->r_commit.c_pages == NULL) {
12055 12055 rp->r_commit.c_commbase = (offset3)pp->p_offset;
12056 12056 rp->r_commit.c_commlen = PAGESIZE;
12057 12057 } else {
12058 12058 rp->r_commit.c_commlen = (offset3)pp->p_offset -
12059 12059 rp->r_commit.c_commbase + PAGESIZE;
12060 12060 }
12061 12061 page_add(&rp->r_commit.c_pages, pp);
12062 12062 }
12063 12063 }
12064 12064
12065 12065 /*
12066 12066 * Called from nfs4_close(), nfs4_fsync() and nfs4_delmap().
12067 12067 * Flushes and commits data to the server.
12068 12068 */
12069 12069 static int
12070 12070 nfs4_putpage_commit(vnode_t *vp, offset_t poff, size_t plen, cred_t *cr)
12071 12071 {
12072 12072 int error;
12073 12073 verifier4 write_verf;
12074 12074 rnode4_t *rp = VTOR4(vp);
12075 12075
12076 12076 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
12077 12077
12078 12078 /*
12079 12079 * Flush the data portion of the file and then commit any
12080 12080 * portions which need to be committed. This may need to
12081 12081 * be done twice if the server has changed state since
12082 12082 * data was last written. The data will need to be
12083 12083 * rewritten to the server and then a new commit done.
12084 12084 *
12085 12085 * In fact, this may need to be done several times if the
12086 12086 * server is having problems and crashing while we are
12087 12087 * attempting to do this.
12088 12088 */
12089 12089
12090 12090 top:
12091 12091 /*
12092 12092 * Do a flush based on the poff and plen arguments. This
12093 12093 * will synchronously write out any modified pages in the
12094 12094 * range specified by (poff, plen). This starts all of the
12095 12095 * i/o operations which will be waited for in the next
12096 12096 * call to nfs4_putpage
12097 12097 */
12098 12098
12099 12099 mutex_enter(&rp->r_statelock);
12100 12100 write_verf = rp->r_writeverf;
12101 12101 mutex_exit(&rp->r_statelock);
12102 12102
12103 12103 error = nfs4_putpage(vp, poff, plen, B_ASYNC, cr, NULL);
12104 12104 if (error == EAGAIN)
12105 12105 error = 0;
12106 12106
12107 12107 /*
12108 12108 * Do a flush based on the poff and plen arguments. This
12109 12109 * will synchronously write out any modified pages in the
12110 12110 * range specified by (poff, plen) and wait until all of
12111 12111 * the asynchronous i/o's in that range are done as well.
12112 12112 */
12113 12113 if (!error)
12114 12114 error = nfs4_putpage(vp, poff, plen, 0, cr, NULL);
12115 12115
12116 12116 if (error)
12117 12117 return (error);
12118 12118
12119 12119 mutex_enter(&rp->r_statelock);
12120 12120 if (rp->r_writeverf != write_verf) {
12121 12121 mutex_exit(&rp->r_statelock);
12122 12122 goto top;
12123 12123 }
12124 12124 mutex_exit(&rp->r_statelock);
12125 12125
12126 12126 /*
12127 12127 * Now commit any pages which might need to be committed.
12128 12128 * If the error, NFS_VERF_MISMATCH, is returned, then
12129 12129 * start over with the flush operation.
12130 12130 */
12131 12131 error = nfs4_commit_vp(vp, poff, plen, cr, NFS4_WRITE_WAIT);
12132 12132
12133 12133 if (error == NFS_VERF_MISMATCH)
12134 12134 goto top;
12135 12135
12136 12136 return (error);
12137 12137 }
12138 12138
12139 12139 /*
12140 12140 * nfs4_commit_vp() will wait for other pending commits and
12141 12141 * will either commit the whole file or a range, plen dictates
12142 12142 * if we commit whole file. a value of zero indicates the whole
12143 12143 * file. Called from nfs4_putpage_commit() or nfs4_sync_putapage()
12144 12144 */
12145 12145 static int
12146 12146 nfs4_commit_vp(vnode_t *vp, u_offset_t poff, size_t plen,
12147 12147 cred_t *cr, int wait_on_writes)
12148 12148 {
12149 12149 rnode4_t *rp;
12150 12150 page_t *plist;
12151 12151 offset3 offset;
12152 12152 count3 len;
12153 12153
12154 12154 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
12155 12155
12156 12156 rp = VTOR4(vp);
12157 12157
12158 12158 /*
12159 12159 * before we gather commitable pages make
12160 12160 * sure there are no outstanding async writes
12161 12161 */
12162 12162 if (rp->r_count && wait_on_writes == NFS4_WRITE_WAIT) {
12163 12163 mutex_enter(&rp->r_statelock);
12164 12164 while (rp->r_count > 0) {
12165 12165 cv_wait(&rp->r_cv, &rp->r_statelock);
12166 12166 }
12167 12167 mutex_exit(&rp->r_statelock);
12168 12168 }
12169 12169
12170 12170 /*
12171 12171 * Set the `commit inprogress' state bit. We must
12172 12172 * first wait until any current one finishes.
12173 12173 */
12174 12174 mutex_enter(&rp->r_statelock);
12175 12175 while (rp->r_flags & R4COMMIT) {
12176 12176 rp->r_flags |= R4COMMITWAIT;
12177 12177 cv_wait(&rp->r_commit.c_cv, &rp->r_statelock);
12178 12178 rp->r_flags &= ~R4COMMITWAIT;
12179 12179 }
12180 12180 rp->r_flags |= R4COMMIT;
12181 12181 mutex_exit(&rp->r_statelock);
12182 12182
12183 12183 /*
12184 12184 * Gather all of the pages which need to be
12185 12185 * committed.
12186 12186 */
12187 12187 if (plen == 0)
12188 12188 nfs4_get_commit(vp);
12189 12189 else
12190 12190 nfs4_get_commit_range(vp, poff, plen);
12191 12191
12192 12192 /*
12193 12193 * Clear the `commit inprogress' bit and disconnect the
12194 12194 * page list which was gathered by nfs4_get_commit.
12195 12195 */
12196 12196 plist = rp->r_commit.c_pages;
12197 12197 rp->r_commit.c_pages = NULL;
12198 12198 offset = rp->r_commit.c_commbase;
12199 12199 len = rp->r_commit.c_commlen;
12200 12200 mutex_enter(&rp->r_statelock);
12201 12201 rp->r_flags &= ~R4COMMIT;
12202 12202 cv_broadcast(&rp->r_commit.c_cv);
12203 12203 mutex_exit(&rp->r_statelock);
12204 12204
12205 12205 /*
12206 12206 * If any pages need to be committed, commit them and
12207 12207 * then unlock them so that they can be freed some
12208 12208 * time later.
12209 12209 */
12210 12210 if (plist == NULL)
12211 12211 return (0);
12212 12212
12213 12213 /*
12214 12214 * No error occurred during the flush portion
12215 12215 * of this operation, so now attempt to commit
12216 12216 * the data to stable storage on the server.
12217 12217 *
12218 12218 * This will unlock all of the pages on the list.
12219 12219 */
12220 12220 return (nfs4_sync_commit(vp, plist, offset, len, cr));
12221 12221 }
12222 12222
12223 12223 static int
12224 12224 nfs4_sync_commit(vnode_t *vp, page_t *plist, offset3 offset, count3 count,
12225 12225 cred_t *cr)
12226 12226 {
12227 12227 int error;
12228 12228 page_t *pp;
12229 12229
12230 12230 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
12231 12231
12232 12232 error = nfs4_commit(vp, (offset4)offset, (count3)count, cr);
12233 12233
12234 12234 /*
12235 12235 * If we got an error, then just unlock all of the pages
12236 12236 * on the list.
12237 12237 */
12238 12238 if (error) {
12239 12239 while (plist != NULL) {
12240 12240 pp = plist;
12241 12241 page_sub(&plist, pp);
12242 12242 page_unlock(pp);
12243 12243 }
12244 12244 return (error);
12245 12245 }
12246 12246 /*
12247 12247 * We've tried as hard as we can to commit the data to stable
12248 12248 * storage on the server. We just unlock the pages and clear
12249 12249 * the commit required state. They will get freed later.
12250 12250 */
12251 12251 while (plist != NULL) {
12252 12252 pp = plist;
12253 12253 page_sub(&plist, pp);
12254 12254 pp->p_fsdata = C_NOCOMMIT;
12255 12255 page_unlock(pp);
12256 12256 }
12257 12257
12258 12258 return (error);
12259 12259 }
12260 12260
12261 12261 static void
12262 12262 do_nfs4_async_commit(vnode_t *vp, page_t *plist, offset3 offset, count3 count,
12263 12263 cred_t *cr)
12264 12264 {
12265 12265
12266 12266 (void) nfs4_sync_commit(vp, plist, offset, count, cr);
12267 12267 }
12268 12268
12269 12269 /*ARGSUSED*/
12270 12270 static int
12271 12271 nfs4_setsecattr(vnode_t *vp, vsecattr_t *vsecattr, int flag, cred_t *cr,
12272 12272 caller_context_t *ct)
12273 12273 {
12274 12274 int error = 0;
12275 12275 mntinfo4_t *mi;
12276 12276 vattr_t va;
12277 12277 vsecattr_t nfsace4_vsap;
12278 12278
12279 12279 mi = VTOMI4(vp);
12280 12280 if (nfs_zone() != mi->mi_zone)
12281 12281 return (EIO);
12282 12282 if (mi->mi_flags & MI4_ACL) {
12283 12283 /* if we have a delegation, return it */
12284 12284 if (VTOR4(vp)->r_deleg_type != OPEN_DELEGATE_NONE)
12285 12285 (void) nfs4delegreturn(VTOR4(vp),
12286 12286 NFS4_DR_REOPEN|NFS4_DR_PUSH);
12287 12287
12288 12288 error = nfs4_is_acl_mask_valid(vsecattr->vsa_mask,
12289 12289 NFS4_ACL_SET);
12290 12290 if (error) /* EINVAL */
12291 12291 return (error);
12292 12292
12293 12293 if (vsecattr->vsa_mask & (VSA_ACL | VSA_DFACL)) {
12294 12294 /*
12295 12295 * These are aclent_t type entries.
12296 12296 */
12297 12297 error = vs_aent_to_ace4(vsecattr, &nfsace4_vsap,
12298 12298 vp->v_type == VDIR, FALSE);
12299 12299 if (error)
12300 12300 return (error);
12301 12301 } else {
12302 12302 /*
12303 12303 * These are ace_t type entries.
12304 12304 */
12305 12305 error = vs_acet_to_ace4(vsecattr, &nfsace4_vsap,
12306 12306 FALSE);
12307 12307 if (error)
12308 12308 return (error);
12309 12309 }
12310 12310 bzero(&va, sizeof (va));
12311 12311 error = nfs4setattr(vp, &va, flag, cr, &nfsace4_vsap);
12312 12312 vs_ace4_destroy(&nfsace4_vsap);
12313 12313 return (error);
12314 12314 }
12315 12315 return (ENOSYS);
12316 12316 }
12317 12317
12318 12318 /* ARGSUSED */
12319 12319 int
12320 12320 nfs4_getsecattr(vnode_t *vp, vsecattr_t *vsecattr, int flag, cred_t *cr,
12321 12321 caller_context_t *ct)
12322 12322 {
12323 12323 int error;
12324 12324 mntinfo4_t *mi;
12325 12325 nfs4_ga_res_t gar;
12326 12326 rnode4_t *rp = VTOR4(vp);
12327 12327
12328 12328 mi = VTOMI4(vp);
12329 12329 if (nfs_zone() != mi->mi_zone)
12330 12330 return (EIO);
12331 12331
12332 12332 bzero(&gar, sizeof (gar));
12333 12333 gar.n4g_vsa.vsa_mask = vsecattr->vsa_mask;
12334 12334
12335 12335 /*
12336 12336 * vsecattr->vsa_mask holds the original acl request mask.
12337 12337 * This is needed when determining what to return.
12338 12338 * (See: nfs4_create_getsecattr_return())
12339 12339 */
12340 12340 error = nfs4_is_acl_mask_valid(vsecattr->vsa_mask, NFS4_ACL_GET);
12341 12341 if (error) /* EINVAL */
12342 12342 return (error);
12343 12343
12344 12344 /*
12345 12345 * If this is a referral stub, don't try to go OTW for an ACL
12346 12346 */
12347 12347 if (RP_ISSTUB_REFERRAL(VTOR4(vp)))
12348 12348 return (fs_fab_acl(vp, vsecattr, flag, cr, ct));
12349 12349
12350 12350 if (mi->mi_flags & MI4_ACL) {
12351 12351 /*
12352 12352 * Check if the data is cached and the cache is valid. If it
12353 12353 * is we don't go over the wire.
12354 12354 */
12355 12355 if (rp->r_secattr != NULL && ATTRCACHE4_VALID(vp)) {
12356 12356 mutex_enter(&rp->r_statelock);
12357 12357 if (rp->r_secattr != NULL) {
12358 12358 error = nfs4_create_getsecattr_return(
12359 12359 rp->r_secattr, vsecattr, rp->r_attr.va_uid,
12360 12360 rp->r_attr.va_gid,
12361 12361 vp->v_type == VDIR);
12362 12362 if (!error) { /* error == 0 - Success! */
12363 12363 mutex_exit(&rp->r_statelock);
12364 12364 return (error);
12365 12365 }
12366 12366 }
12367 12367 mutex_exit(&rp->r_statelock);
12368 12368 }
12369 12369
12370 12370 /*
12371 12371 * The getattr otw call will always get both the acl, in
12372 12372 * the form of a list of nfsace4's, and the number of acl
12373 12373 * entries; independent of the value of gar.n4g_vsa.vsa_mask.
12374 12374 */
12375 12375 gar.n4g_va.va_mask = AT_ALL;
12376 12376 error = nfs4_getattr_otw(vp, &gar, cr, 1);
12377 12377 if (error) {
12378 12378 vs_ace4_destroy(&gar.n4g_vsa);
12379 12379 if (error == ENOTSUP || error == EOPNOTSUPP)
12380 12380 error = fs_fab_acl(vp, vsecattr, flag, cr, ct);
12381 12381 return (error);
12382 12382 }
12383 12383
12384 12384 if (!(gar.n4g_resbmap & FATTR4_ACL_MASK)) {
12385 12385 /*
12386 12386 * No error was returned, but according to the response
12387 12387 * bitmap, neither was an acl.
12388 12388 */
12389 12389 vs_ace4_destroy(&gar.n4g_vsa);
12390 12390 error = fs_fab_acl(vp, vsecattr, flag, cr, ct);
12391 12391 return (error);
12392 12392 }
12393 12393
12394 12394 /*
12395 12395 * Update the cache with the ACL.
12396 12396 */
12397 12397 nfs4_acl_fill_cache(rp, &gar.n4g_vsa);
12398 12398
12399 12399 error = nfs4_create_getsecattr_return(&gar.n4g_vsa,
12400 12400 vsecattr, gar.n4g_va.va_uid, gar.n4g_va.va_gid,
12401 12401 vp->v_type == VDIR);
12402 12402 vs_ace4_destroy(&gar.n4g_vsa);
12403 12403 if ((error) && (vsecattr->vsa_mask &
12404 12404 (VSA_ACL | VSA_ACLCNT | VSA_DFACL | VSA_DFACLCNT)) &&
12405 12405 (error != EACCES)) {
12406 12406 error = fs_fab_acl(vp, vsecattr, flag, cr, ct);
12407 12407 }
12408 12408 return (error);
12409 12409 }
12410 12410 error = fs_fab_acl(vp, vsecattr, flag, cr, ct);
12411 12411 return (error);
12412 12412 }
12413 12413
12414 12414 /*
12415 12415 * The function returns:
12416 12416 * - 0 (zero) if the passed in "acl_mask" is a valid request.
12417 12417 * - EINVAL if the passed in "acl_mask" is an invalid request.
12418 12418 *
12419 12419 * In the case of getting an acl (op == NFS4_ACL_GET) the mask is invalid if:
12420 12420 * - We have a mixture of ACE and ACL requests (e.g. VSA_ACL | VSA_ACE)
12421 12421 *
12422 12422 * In the case of setting an acl (op == NFS4_ACL_SET) the mask is invalid if:
12423 12423 * - We have a mixture of ACE and ACL requests (e.g. VSA_ACL | VSA_ACE)
12424 12424 * - We have a count field set without the corresponding acl field set. (e.g. -
12425 12425 * VSA_ACECNT is set, but VSA_ACE is not)
12426 12426 */
12427 12427 static int
12428 12428 nfs4_is_acl_mask_valid(uint_t acl_mask, nfs4_acl_op_t op)
12429 12429 {
12430 12430 /* Shortcut the masks that are always valid. */
12431 12431 if (acl_mask == (VSA_ACE | VSA_ACECNT))
12432 12432 return (0);
12433 12433 if (acl_mask == (VSA_ACL | VSA_ACLCNT | VSA_DFACL | VSA_DFACLCNT))
12434 12434 return (0);
12435 12435
12436 12436 if (acl_mask & (VSA_ACE | VSA_ACECNT)) {
12437 12437 /*
12438 12438 * We can't have any VSA_ACL type stuff in the mask now.
12439 12439 */
12440 12440 if (acl_mask & (VSA_ACL | VSA_ACLCNT | VSA_DFACL |
12441 12441 VSA_DFACLCNT))
12442 12442 return (EINVAL);
12443 12443
12444 12444 if (op == NFS4_ACL_SET) {
12445 12445 if ((acl_mask & VSA_ACECNT) && !(acl_mask & VSA_ACE))
12446 12446 return (EINVAL);
12447 12447 }
12448 12448 }
12449 12449
12450 12450 if (acl_mask & (VSA_ACL | VSA_ACLCNT | VSA_DFACL | VSA_DFACLCNT)) {
12451 12451 /*
12452 12452 * We can't have any VSA_ACE type stuff in the mask now.
12453 12453 */
12454 12454 if (acl_mask & (VSA_ACE | VSA_ACECNT))
12455 12455 return (EINVAL);
12456 12456
12457 12457 if (op == NFS4_ACL_SET) {
12458 12458 if ((acl_mask & VSA_ACLCNT) && !(acl_mask & VSA_ACL))
12459 12459 return (EINVAL);
12460 12460
12461 12461 if ((acl_mask & VSA_DFACLCNT) &&
12462 12462 !(acl_mask & VSA_DFACL))
12463 12463 return (EINVAL);
12464 12464 }
12465 12465 }
12466 12466 return (0);
12467 12467 }
12468 12468
12469 12469 /*
12470 12470 * The theory behind creating the correct getsecattr return is simply this:
12471 12471 * "Don't return anything that the caller is not expecting to have to free."
12472 12472 */
12473 12473 static int
12474 12474 nfs4_create_getsecattr_return(vsecattr_t *filled_vsap, vsecattr_t *vsap,
12475 12475 uid_t uid, gid_t gid, int isdir)
12476 12476 {
12477 12477 int error = 0;
12478 12478 /* Save the mask since the translators modify it. */
12479 12479 uint_t orig_mask = vsap->vsa_mask;
12480 12480
12481 12481 if (orig_mask & (VSA_ACE | VSA_ACECNT)) {
12482 12482 error = vs_ace4_to_acet(filled_vsap, vsap, uid, gid, FALSE);
12483 12483
12484 12484 if (error)
12485 12485 return (error);
12486 12486
12487 12487 /*
12488 12488 * If the caller only asked for the ace count (VSA_ACECNT)
12489 12489 * don't give them the full acl (VSA_ACE), free it.
12490 12490 */
12491 12491 if (!orig_mask & VSA_ACE) {
12492 12492 if (vsap->vsa_aclentp != NULL) {
12493 12493 kmem_free(vsap->vsa_aclentp,
12494 12494 vsap->vsa_aclcnt * sizeof (ace_t));
12495 12495 vsap->vsa_aclentp = NULL;
12496 12496 }
12497 12497 }
12498 12498 vsap->vsa_mask = orig_mask;
12499 12499
12500 12500 } else if (orig_mask & (VSA_ACL | VSA_ACLCNT | VSA_DFACL |
12501 12501 VSA_DFACLCNT)) {
12502 12502 error = vs_ace4_to_aent(filled_vsap, vsap, uid, gid,
12503 12503 isdir, FALSE);
12504 12504
12505 12505 if (error)
12506 12506 return (error);
12507 12507
12508 12508 /*
12509 12509 * If the caller only asked for the acl count (VSA_ACLCNT)
12510 12510 * and/or the default acl count (VSA_DFACLCNT) don't give them
12511 12511 * the acl (VSA_ACL) or default acl (VSA_DFACL), free it.
12512 12512 */
12513 12513 if (!orig_mask & VSA_ACL) {
12514 12514 if (vsap->vsa_aclentp != NULL) {
12515 12515 kmem_free(vsap->vsa_aclentp,
12516 12516 vsap->vsa_aclcnt * sizeof (aclent_t));
12517 12517 vsap->vsa_aclentp = NULL;
12518 12518 }
12519 12519 }
12520 12520
12521 12521 if (!orig_mask & VSA_DFACL) {
12522 12522 if (vsap->vsa_dfaclentp != NULL) {
12523 12523 kmem_free(vsap->vsa_dfaclentp,
12524 12524 vsap->vsa_dfaclcnt * sizeof (aclent_t));
12525 12525 vsap->vsa_dfaclentp = NULL;
12526 12526 }
12527 12527 }
12528 12528 vsap->vsa_mask = orig_mask;
12529 12529 }
12530 12530 return (0);
12531 12531 }
12532 12532
12533 12533 /* ARGSUSED */
12534 12534 int
12535 12535 nfs4_shrlock(vnode_t *vp, int cmd, struct shrlock *shr, int flag, cred_t *cr,
12536 12536 caller_context_t *ct)
12537 12537 {
12538 12538 int error;
12539 12539
12540 12540 if (nfs_zone() != VTOMI4(vp)->mi_zone)
12541 12541 return (EIO);
12542 12542 /*
12543 12543 * check for valid cmd parameter
12544 12544 */
12545 12545 if (cmd != F_SHARE && cmd != F_UNSHARE && cmd != F_HASREMOTELOCKS)
12546 12546 return (EINVAL);
12547 12547
12548 12548 /*
12549 12549 * Check access permissions
12550 12550 */
12551 12551 if ((cmd & F_SHARE) &&
12552 12552 (((shr->s_access & F_RDACC) && (flag & FREAD) == 0) ||
12553 12553 (shr->s_access == F_WRACC && (flag & FWRITE) == 0)))
12554 12554 return (EBADF);
12555 12555
12556 12556 /*
12557 12557 * If the filesystem is mounted using local locking, pass the
12558 12558 * request off to the local share code.
12559 12559 */
12560 12560 if (VTOMI4(vp)->mi_flags & MI4_LLOCK)
12561 12561 return (fs_shrlock(vp, cmd, shr, flag, cr, ct));
12562 12562
12563 12563 switch (cmd) {
12564 12564 case F_SHARE:
12565 12565 case F_UNSHARE:
12566 12566 /*
12567 12567 * This will be properly implemented later,
12568 12568 * see RFE: 4823948 .
12569 12569 */
12570 12570 error = EAGAIN;
12571 12571 break;
12572 12572
12573 12573 case F_HASREMOTELOCKS:
12574 12574 /*
12575 12575 * NFS client can't store remote locks itself
12576 12576 */
12577 12577 shr->s_access = 0;
12578 12578 error = 0;
12579 12579 break;
12580 12580
12581 12581 default:
12582 12582 error = EINVAL;
12583 12583 break;
12584 12584 }
12585 12585
12586 12586 return (error);
12587 12587 }
12588 12588
12589 12589 /*
12590 12590 * Common code called by directory ops to update the attrcache
12591 12591 */
12592 12592 static int
12593 12593 nfs4_update_attrcache(nfsstat4 status, nfs4_ga_res_t *garp,
12594 12594 hrtime_t t, vnode_t *vp, cred_t *cr)
12595 12595 {
12596 12596 int error = 0;
12597 12597
12598 12598 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
12599 12599
12600 12600 if (status != NFS4_OK) {
12601 12601 /* getattr not done or failed */
12602 12602 PURGE_ATTRCACHE4(vp);
12603 12603 return (error);
12604 12604 }
12605 12605
12606 12606 if (garp) {
12607 12607 nfs4_attr_cache(vp, garp, t, cr, FALSE, NULL);
12608 12608 } else {
12609 12609 PURGE_ATTRCACHE4(vp);
12610 12610 }
12611 12611 return (error);
12612 12612 }
12613 12613
12614 12614 /*
12615 12615 * Update directory caches for directory modification ops (link, rename, etc.)
12616 12616 * When dinfo is NULL, manage dircaches in the old way.
12617 12617 */
12618 12618 static void
12619 12619 nfs4_update_dircaches(change_info4 *cinfo, vnode_t *dvp, vnode_t *vp, char *nm,
12620 12620 dirattr_info_t *dinfo)
12621 12621 {
12622 12622 rnode4_t *drp = VTOR4(dvp);
12623 12623
12624 12624 ASSERT(nfs_zone() == VTOMI4(dvp)->mi_zone);
12625 12625
12626 12626 /* Purge rddir cache for dir since it changed */
12627 12627 if (drp->r_dir != NULL)
12628 12628 nfs4_purge_rddir_cache(dvp);
12629 12629
12630 12630 /*
12631 12631 * If caller provided dinfo, then use it to manage dir caches.
12632 12632 */
12633 12633 if (dinfo != NULL) {
12634 12634 if (vp != NULL) {
12635 12635 mutex_enter(&VTOR4(vp)->r_statev4_lock);
12636 12636 if (!VTOR4(vp)->created_v4) {
12637 12637 mutex_exit(&VTOR4(vp)->r_statev4_lock);
12638 12638 dnlc_update(dvp, nm, vp);
12639 12639 } else {
12640 12640 /*
12641 12641 * XXX don't update if the created_v4 flag is
12642 12642 * set
12643 12643 */
12644 12644 mutex_exit(&VTOR4(vp)->r_statev4_lock);
12645 12645 NFS4_DEBUG(nfs4_client_state_debug,
12646 12646 (CE_NOTE, "nfs4_update_dircaches: "
12647 12647 "don't update dnlc: created_v4 flag"));
12648 12648 }
12649 12649 }
12650 12650
12651 12651 nfs4_attr_cache(dvp, dinfo->di_garp, dinfo->di_time_call,
12652 12652 dinfo->di_cred, FALSE, cinfo);
12653 12653
12654 12654 return;
12655 12655 }
12656 12656
12657 12657 /*
12658 12658 * Caller didn't provide dinfo, then check change_info4 to update DNLC.
12659 12659 * Since caller modified dir but didn't receive post-dirmod-op dir
12660 12660 * attrs, the dir's attrs must be purged.
12661 12661 *
12662 12662 * XXX this check and dnlc update/purge should really be atomic,
12663 12663 * XXX but can't use rnode statelock because it'll deadlock in
12664 12664 * XXX dnlc_purge_vp, however, the risk is minimal even if a race
12665 12665 * XXX does occur.
12666 12666 *
12667 12667 * XXX We also may want to check that atomic is true in the
12668 12668 * XXX change_info struct. If it is not, the change_info may
12669 12669 * XXX reflect changes by more than one clients which means that
12670 12670 * XXX our cache may not be valid.
12671 12671 */
12672 12672 PURGE_ATTRCACHE4(dvp);
12673 12673 if (drp->r_change == cinfo->before) {
12674 12674 /* no changes took place in the directory prior to our link */
12675 12675 if (vp != NULL) {
12676 12676 mutex_enter(&VTOR4(vp)->r_statev4_lock);
12677 12677 if (!VTOR4(vp)->created_v4) {
12678 12678 mutex_exit(&VTOR4(vp)->r_statev4_lock);
12679 12679 dnlc_update(dvp, nm, vp);
12680 12680 } else {
12681 12681 /*
12682 12682 * XXX dont' update if the created_v4 flag
12683 12683 * is set
12684 12684 */
12685 12685 mutex_exit(&VTOR4(vp)->r_statev4_lock);
12686 12686 NFS4_DEBUG(nfs4_client_state_debug, (CE_NOTE,
12687 12687 "nfs4_update_dircaches: don't"
12688 12688 " update dnlc: created_v4 flag"));
12689 12689 }
12690 12690 }
12691 12691 } else {
12692 12692 /* Another client modified directory - purge its dnlc cache */
12693 12693 dnlc_purge_vp(dvp);
12694 12694 }
12695 12695 }
12696 12696
12697 12697 /*
12698 12698 * The OPEN_CONFIRM operation confirms the sequence number used in OPENing a
12699 12699 * file.
12700 12700 *
12701 12701 * The 'reopening_file' boolean should be set to TRUE if we are reopening this
12702 12702 * file (ie: client recovery) and otherwise set to FALSE.
12703 12703 *
12704 12704 * 'nfs4_start/end_op' should have been called by the proper (ie: not recovery
12705 12705 * initiated) calling functions.
12706 12706 *
12707 12707 * 'resend' is set to TRUE if this is a OPEN_CONFIRM issued as a result
12708 12708 * of resending a 'lost' open request.
12709 12709 *
12710 12710 * 'num_bseqid_retryp' makes sure we don't loop forever on a broken
12711 12711 * server that hands out BAD_SEQID on open confirm.
12712 12712 *
12713 12713 * Errors are returned via the nfs4_error_t parameter.
12714 12714 */
12715 12715 void
12716 12716 nfs4open_confirm(vnode_t *vp, seqid4 *seqid, stateid4 *stateid, cred_t *cr,
12717 12717 bool_t reopening_file, bool_t *retry_open, nfs4_open_owner_t *oop,
12718 12718 bool_t resend, nfs4_error_t *ep, int *num_bseqid_retryp)
12719 12719 {
12720 12720 COMPOUND4args_clnt args;
12721 12721 COMPOUND4res_clnt res;
12722 12722 nfs_argop4 argop[2];
12723 12723 nfs_resop4 *resop;
12724 12724 int doqueue = 1;
12725 12725 mntinfo4_t *mi;
12726 12726 OPEN_CONFIRM4args *open_confirm_args;
12727 12727 int needrecov;
12728 12728
12729 12729 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
12730 12730 #if DEBUG
12731 12731 mutex_enter(&oop->oo_lock);
12732 12732 ASSERT(oop->oo_seqid_inuse);
12733 12733 mutex_exit(&oop->oo_lock);
12734 12734 #endif
12735 12735
12736 12736 recov_retry_confirm:
12737 12737 nfs4_error_zinit(ep);
12738 12738 *retry_open = FALSE;
12739 12739
12740 12740 if (resend)
12741 12741 args.ctag = TAG_OPEN_CONFIRM_LOST;
12742 12742 else
12743 12743 args.ctag = TAG_OPEN_CONFIRM;
12744 12744
12745 12745 args.array_len = 2;
12746 12746 args.array = argop;
12747 12747
12748 12748 /* putfh target fh */
12749 12749 argop[0].argop = OP_CPUTFH;
12750 12750 argop[0].nfs_argop4_u.opcputfh.sfh = VTOR4(vp)->r_fh;
12751 12751
12752 12752 argop[1].argop = OP_OPEN_CONFIRM;
12753 12753 open_confirm_args = &argop[1].nfs_argop4_u.opopen_confirm;
12754 12754
12755 12755 (*seqid) += 1;
12756 12756 open_confirm_args->seqid = *seqid;
12757 12757 open_confirm_args->open_stateid = *stateid;
12758 12758
12759 12759 mi = VTOMI4(vp);
12760 12760
12761 12761 rfs4call(mi, &args, &res, cr, &doqueue, 0, ep);
12762 12762
12763 12763 if (!ep->error && nfs4_need_to_bump_seqid(&res)) {
12764 12764 nfs4_set_open_seqid((*seqid), oop, args.ctag);
12765 12765 }
12766 12766
12767 12767 needrecov = nfs4_needs_recovery(ep, FALSE, mi->mi_vfsp);
12768 12768 if (!needrecov && ep->error)
12769 12769 return;
12770 12770
12771 12771 if (needrecov) {
12772 12772 bool_t abort = FALSE;
12773 12773
12774 12774 if (reopening_file == FALSE) {
12775 12775 nfs4_bseqid_entry_t *bsep = NULL;
12776 12776
12777 12777 if (!ep->error && res.status == NFS4ERR_BAD_SEQID)
12778 12778 bsep = nfs4_create_bseqid_entry(oop, NULL,
12779 12779 vp, 0, args.ctag,
12780 12780 open_confirm_args->seqid);
12781 12781
12782 12782 abort = nfs4_start_recovery(ep, VTOMI4(vp), vp, NULL,
12783 12783 NULL, NULL, OP_OPEN_CONFIRM, bsep, NULL, NULL);
12784 12784 if (bsep) {
12785 12785 kmem_free(bsep, sizeof (*bsep));
12786 12786 if (num_bseqid_retryp &&
12787 12787 --(*num_bseqid_retryp) == 0)
12788 12788 abort = TRUE;
12789 12789 }
12790 12790 }
12791 12791 if ((ep->error == ETIMEDOUT ||
12792 12792 res.status == NFS4ERR_RESOURCE) &&
12793 12793 abort == FALSE && resend == FALSE) {
12794 12794 if (!ep->error)
12795 12795 (void) xdr_free(xdr_COMPOUND4res_clnt,
12796 12796 (caddr_t)&res);
12797 12797
12798 12798 delay(SEC_TO_TICK(confirm_retry_sec));
12799 12799 goto recov_retry_confirm;
12800 12800 }
12801 12801 /* State may have changed so retry the entire OPEN op */
12802 12802 if (abort == FALSE)
12803 12803 *retry_open = TRUE;
12804 12804 else
12805 12805 *retry_open = FALSE;
12806 12806 if (!ep->error)
12807 12807 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
12808 12808 return;
12809 12809 }
12810 12810
12811 12811 if (res.status) {
12812 12812 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
12813 12813 return;
12814 12814 }
12815 12815
12816 12816 resop = &res.array[1]; /* open confirm res */
12817 12817 bcopy(&resop->nfs_resop4_u.opopen_confirm.open_stateid,
12818 12818 stateid, sizeof (*stateid));
12819 12819
12820 12820 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)&res);
12821 12821 }
12822 12822
12823 12823 /*
12824 12824 * Return the credentials associated with a client state object. The
12825 12825 * caller is responsible for freeing the credentials.
12826 12826 */
12827 12827
12828 12828 static cred_t *
12829 12829 state_to_cred(nfs4_open_stream_t *osp)
12830 12830 {
12831 12831 cred_t *cr;
12832 12832
12833 12833 /*
12834 12834 * It's ok to not lock the open stream and open owner to get
12835 12835 * the oo_cred since this is only written once (upon creation)
12836 12836 * and will not change.
12837 12837 */
12838 12838 cr = osp->os_open_owner->oo_cred;
12839 12839 crhold(cr);
12840 12840
12841 12841 return (cr);
12842 12842 }
12843 12843
12844 12844 /*
12845 12845 * nfs4_find_sysid
12846 12846 *
12847 12847 * Find the sysid for the knetconfig associated with the given mi.
12848 12848 */
12849 12849 static struct lm_sysid *
12850 12850 nfs4_find_sysid(mntinfo4_t *mi)
12851 12851 {
12852 12852 ASSERT(nfs_zone() == mi->mi_zone);
12853 12853
12854 12854 /*
12855 12855 * Switch from RDMA knconf to original mount knconf
12856 12856 */
12857 12857 return (lm_get_sysid(ORIG_KNCONF(mi), &mi->mi_curr_serv->sv_addr,
12858 12858 mi->mi_curr_serv->sv_hostname, NULL));
12859 12859 }
12860 12860
12861 12861 #ifdef DEBUG
12862 12862 /*
12863 12863 * Return a string version of the call type for easy reading.
12864 12864 */
12865 12865 static char *
12866 12866 nfs4frlock_get_call_type(nfs4_lock_call_type_t ctype)
12867 12867 {
12868 12868 switch (ctype) {
12869 12869 case NFS4_LCK_CTYPE_NORM:
12870 12870 return ("NORMAL");
12871 12871 case NFS4_LCK_CTYPE_RECLAIM:
12872 12872 return ("RECLAIM");
12873 12873 case NFS4_LCK_CTYPE_RESEND:
12874 12874 return ("RESEND");
12875 12875 case NFS4_LCK_CTYPE_REINSTATE:
12876 12876 return ("REINSTATE");
12877 12877 default:
12878 12878 cmn_err(CE_PANIC, "nfs4frlock_get_call_type: got illegal "
12879 12879 "type %d", ctype);
12880 12880 return ("");
12881 12881 }
12882 12882 }
12883 12883 #endif
12884 12884
12885 12885 /*
12886 12886 * Map the frlock cmd and lock type to the NFSv4 over-the-wire lock type
12887 12887 * Unlock requests don't have an over-the-wire locktype, so we just return
12888 12888 * something non-threatening.
12889 12889 */
12890 12890
12891 12891 static nfs_lock_type4
12892 12892 flk_to_locktype(int cmd, int l_type)
12893 12893 {
12894 12894 ASSERT(l_type == F_RDLCK || l_type == F_WRLCK || l_type == F_UNLCK);
12895 12895
12896 12896 switch (l_type) {
12897 12897 case F_UNLCK:
12898 12898 return (READ_LT);
12899 12899 case F_RDLCK:
12900 12900 if (cmd == F_SETLK)
12901 12901 return (READ_LT);
12902 12902 else
12903 12903 return (READW_LT);
12904 12904 case F_WRLCK:
12905 12905 if (cmd == F_SETLK)
12906 12906 return (WRITE_LT);
12907 12907 else
12908 12908 return (WRITEW_LT);
12909 12909 }
12910 12910 panic("flk_to_locktype");
12911 12911 /*NOTREACHED*/
12912 12912 }
12913 12913
12914 12914 /*
12915 12915 * Do some preliminary checks for nfs4frlock.
12916 12916 */
12917 12917 static int
12918 12918 nfs4frlock_validate_args(int cmd, flock64_t *flk, int flag, vnode_t *vp,
12919 12919 u_offset_t offset)
12920 12920 {
12921 12921 int error = 0;
12922 12922
12923 12923 /*
12924 12924 * If we are setting a lock, check that the file is opened
12925 12925 * with the correct mode.
12926 12926 */
12927 12927 if (cmd == F_SETLK || cmd == F_SETLKW) {
12928 12928 if ((flk->l_type == F_RDLCK && (flag & FREAD) == 0) ||
12929 12929 (flk->l_type == F_WRLCK && (flag & FWRITE) == 0)) {
12930 12930 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
12931 12931 "nfs4frlock_validate_args: file was opened with "
12932 12932 "incorrect mode"));
12933 12933 return (EBADF);
12934 12934 }
12935 12935 }
12936 12936
12937 12937 /* Convert the offset. It may need to be restored before returning. */
12938 12938 if (error = convoff(vp, flk, 0, offset)) {
12939 12939 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
12940 12940 "nfs4frlock_validate_args: convoff => error= %d\n",
12941 12941 error));
12942 12942 return (error);
12943 12943 }
12944 12944
12945 12945 return (error);
12946 12946 }
12947 12947
12948 12948 /*
12949 12949 * Set the flock64's lm_sysid for nfs4frlock.
12950 12950 */
12951 12951 static int
12952 12952 nfs4frlock_get_sysid(struct lm_sysid **lspp, vnode_t *vp, flock64_t *flk)
12953 12953 {
12954 12954 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
12955 12955
12956 12956 /* Find the lm_sysid */
12957 12957 *lspp = nfs4_find_sysid(VTOMI4(vp));
12958 12958
12959 12959 if (*lspp == NULL) {
12960 12960 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
12961 12961 "nfs4frlock_get_sysid: no sysid, return ENOLCK"));
12962 12962 return (ENOLCK);
12963 12963 }
12964 12964
12965 12965 flk->l_sysid = lm_sysidt(*lspp);
12966 12966
12967 12967 return (0);
12968 12968 }
12969 12969
12970 12970 /*
12971 12971 * Do the remaining preliminary setup for nfs4frlock.
12972 12972 */
12973 12973 static void
12974 12974 nfs4frlock_pre_setup(clock_t *tick_delayp, nfs4_recov_state_t *recov_statep,
12975 12975 flock64_t *flk, short *whencep, vnode_t *vp, cred_t *search_cr,
12976 12976 cred_t **cred_otw)
12977 12977 {
12978 12978 /*
12979 12979 * set tick_delay to the base delay time.
12980 12980 * (NFS4_BASE_WAIT_TIME is in secs)
12981 12981 */
12982 12982
12983 12983 *tick_delayp = drv_usectohz(NFS4_BASE_WAIT_TIME * 1000 * 1000);
12984 12984
12985 12985 /*
12986 12986 * If lock is relative to EOF, we need the newest length of the
12987 12987 * file. Therefore invalidate the ATTR_CACHE.
12988 12988 */
12989 12989
12990 12990 *whencep = flk->l_whence;
12991 12991
12992 12992 if (*whencep == 2) /* SEEK_END */
12993 12993 PURGE_ATTRCACHE4(vp);
12994 12994
12995 12995 recov_statep->rs_flags = 0;
12996 12996 recov_statep->rs_num_retry_despite_err = 0;
12997 12997 *cred_otw = nfs4_get_otw_cred(search_cr, VTOMI4(vp), NULL);
12998 12998 }
12999 12999
13000 13000 /*
13001 13001 * Initialize and allocate the data structures necessary for
13002 13002 * the nfs4frlock call.
13003 13003 * Allocates argsp's op array, frees up the saved_rqstpp if there is one.
13004 13004 */
13005 13005 static void
13006 13006 nfs4frlock_call_init(COMPOUND4args_clnt *argsp, COMPOUND4args_clnt **argspp,
13007 13007 nfs_argop4 **argopp, nfs4_op_hint_t *op_hintp, flock64_t *flk, int cmd,
13008 13008 bool_t *retry, bool_t *did_start_fop, COMPOUND4res_clnt **respp,
13009 13009 bool_t *skip_get_err, nfs4_lost_rqst_t *lost_rqstp)
13010 13010 {
13011 13011 int argoplist_size;
13012 13012 int num_ops = 2;
13013 13013
13014 13014 *retry = FALSE;
13015 13015 *did_start_fop = FALSE;
13016 13016 *skip_get_err = FALSE;
13017 13017 lost_rqstp->lr_op = 0;
13018 13018 argoplist_size = num_ops * sizeof (nfs_argop4);
13019 13019 /* fill array with zero */
13020 13020 *argopp = kmem_zalloc(argoplist_size, KM_SLEEP);
13021 13021
13022 13022 *argspp = argsp;
13023 13023 *respp = NULL;
13024 13024
13025 13025 argsp->array_len = num_ops;
13026 13026 argsp->array = *argopp;
13027 13027
13028 13028 /* initialize in case of error; will get real value down below */
13029 13029 argsp->ctag = TAG_NONE;
13030 13030
13031 13031 if ((cmd == F_SETLK || cmd == F_SETLKW) && flk->l_type == F_UNLCK)
13032 13032 *op_hintp = OH_LOCKU;
13033 13033 else
13034 13034 *op_hintp = OH_OTHER;
13035 13035 }
13036 13036
13037 13037 /*
13038 13038 * Call the nfs4_start_fop() for nfs4frlock, if necessary. Assign
13039 13039 * the proper nfs4_server_t for this instance of nfs4frlock.
13040 13040 * Returns 0 (success) or an errno value.
13041 13041 */
13042 13042 static int
13043 13043 nfs4frlock_start_call(nfs4_lock_call_type_t ctype, vnode_t *vp,
13044 13044 nfs4_op_hint_t op_hint, nfs4_recov_state_t *recov_statep,
13045 13045 bool_t *did_start_fop, bool_t *startrecovp)
13046 13046 {
13047 13047 int error = 0;
13048 13048 rnode4_t *rp;
13049 13049
13050 13050 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
13051 13051
13052 13052 if (ctype == NFS4_LCK_CTYPE_NORM) {
13053 13053 error = nfs4_start_fop(VTOMI4(vp), vp, NULL, op_hint,
13054 13054 recov_statep, startrecovp);
13055 13055 if (error)
13056 13056 return (error);
13057 13057 *did_start_fop = TRUE;
13058 13058 } else {
13059 13059 *did_start_fop = FALSE;
13060 13060 *startrecovp = FALSE;
13061 13061 }
13062 13062
13063 13063 if (!error) {
13064 13064 rp = VTOR4(vp);
13065 13065
13066 13066 /* If the file failed recovery, just quit. */
13067 13067 mutex_enter(&rp->r_statelock);
13068 13068 if (rp->r_flags & R4RECOVERR) {
13069 13069 error = EIO;
13070 13070 }
13071 13071 mutex_exit(&rp->r_statelock);
13072 13072 }
13073 13073
13074 13074 return (error);
13075 13075 }
13076 13076
13077 13077 /*
13078 13078 * Setup the LOCK4/LOCKU4 arguments for resending a lost lock request. A
13079 13079 * resend nfs4frlock call is initiated by the recovery framework.
13080 13080 * Acquires the lop and oop seqid synchronization.
13081 13081 */
13082 13082 static void
13083 13083 nfs4frlock_setup_resend_lock_args(nfs4_lost_rqst_t *resend_rqstp,
13084 13084 COMPOUND4args_clnt *argsp, nfs_argop4 *argop, nfs4_lock_owner_t **lopp,
13085 13085 nfs4_open_owner_t **oopp, nfs4_open_stream_t **ospp,
13086 13086 LOCK4args **lock_argsp, LOCKU4args **locku_argsp)
13087 13087 {
13088 13088 mntinfo4_t *mi = VTOMI4(resend_rqstp->lr_vp);
13089 13089 int error;
13090 13090
13091 13091 NFS4_DEBUG((nfs4_lost_rqst_debug || nfs4_client_lock_debug),
13092 13092 (CE_NOTE,
13093 13093 "nfs4frlock_setup_resend_lock_args: have lost lock to resend"));
13094 13094 ASSERT(resend_rqstp != NULL);
13095 13095 ASSERT(resend_rqstp->lr_op == OP_LOCK ||
13096 13096 resend_rqstp->lr_op == OP_LOCKU);
13097 13097
13098 13098 *oopp = resend_rqstp->lr_oop;
13099 13099 if (resend_rqstp->lr_oop) {
13100 13100 open_owner_hold(resend_rqstp->lr_oop);
13101 13101 error = nfs4_start_open_seqid_sync(resend_rqstp->lr_oop, mi);
13102 13102 ASSERT(error == 0); /* recov thread always succeeds */
13103 13103 }
13104 13104
13105 13105 /* Must resend this lost lock/locku request. */
13106 13106 ASSERT(resend_rqstp->lr_lop != NULL);
13107 13107 *lopp = resend_rqstp->lr_lop;
13108 13108 lock_owner_hold(resend_rqstp->lr_lop);
13109 13109 error = nfs4_start_lock_seqid_sync(resend_rqstp->lr_lop, mi);
13110 13110 ASSERT(error == 0); /* recov thread always succeeds */
13111 13111
13112 13112 *ospp = resend_rqstp->lr_osp;
13113 13113 if (*ospp)
13114 13114 open_stream_hold(resend_rqstp->lr_osp);
13115 13115
13116 13116 if (resend_rqstp->lr_op == OP_LOCK) {
13117 13117 LOCK4args *lock_args;
13118 13118
13119 13119 argop->argop = OP_LOCK;
13120 13120 *lock_argsp = lock_args = &argop->nfs_argop4_u.oplock;
13121 13121 lock_args->locktype = resend_rqstp->lr_locktype;
13122 13122 lock_args->reclaim =
13123 13123 (resend_rqstp->lr_ctype == NFS4_LCK_CTYPE_RECLAIM);
13124 13124 lock_args->offset = resend_rqstp->lr_flk->l_start;
13125 13125 lock_args->length = resend_rqstp->lr_flk->l_len;
13126 13126 if (lock_args->length == 0)
13127 13127 lock_args->length = ~lock_args->length;
13128 13128 nfs4_setup_lock_args(*lopp, *oopp, *ospp,
13129 13129 mi2clientid(mi), &lock_args->locker);
13130 13130
13131 13131 switch (resend_rqstp->lr_ctype) {
13132 13132 case NFS4_LCK_CTYPE_RESEND:
13133 13133 argsp->ctag = TAG_LOCK_RESEND;
13134 13134 break;
13135 13135 case NFS4_LCK_CTYPE_REINSTATE:
13136 13136 argsp->ctag = TAG_LOCK_REINSTATE;
13137 13137 break;
13138 13138 case NFS4_LCK_CTYPE_RECLAIM:
13139 13139 argsp->ctag = TAG_LOCK_RECLAIM;
13140 13140 break;
13141 13141 default:
13142 13142 argsp->ctag = TAG_LOCK_UNKNOWN;
13143 13143 break;
13144 13144 }
13145 13145 } else {
13146 13146 LOCKU4args *locku_args;
13147 13147 nfs4_lock_owner_t *lop = resend_rqstp->lr_lop;
13148 13148
13149 13149 argop->argop = OP_LOCKU;
13150 13150 *locku_argsp = locku_args = &argop->nfs_argop4_u.oplocku;
13151 13151 locku_args->locktype = READ_LT;
13152 13152 locku_args->seqid = lop->lock_seqid + 1;
13153 13153 mutex_enter(&lop->lo_lock);
13154 13154 locku_args->lock_stateid = lop->lock_stateid;
13155 13155 mutex_exit(&lop->lo_lock);
13156 13156 locku_args->offset = resend_rqstp->lr_flk->l_start;
13157 13157 locku_args->length = resend_rqstp->lr_flk->l_len;
13158 13158 if (locku_args->length == 0)
13159 13159 locku_args->length = ~locku_args->length;
13160 13160
13161 13161 switch (resend_rqstp->lr_ctype) {
13162 13162 case NFS4_LCK_CTYPE_RESEND:
13163 13163 argsp->ctag = TAG_LOCKU_RESEND;
13164 13164 break;
13165 13165 case NFS4_LCK_CTYPE_REINSTATE:
13166 13166 argsp->ctag = TAG_LOCKU_REINSTATE;
13167 13167 break;
13168 13168 default:
13169 13169 argsp->ctag = TAG_LOCK_UNKNOWN;
13170 13170 break;
13171 13171 }
13172 13172 }
13173 13173 }
13174 13174
13175 13175 /*
13176 13176 * Setup the LOCKT4 arguments.
13177 13177 */
13178 13178 static void
13179 13179 nfs4frlock_setup_lockt_args(nfs4_lock_call_type_t ctype, nfs_argop4 *argop,
13180 13180 LOCKT4args **lockt_argsp, COMPOUND4args_clnt *argsp, flock64_t *flk,
13181 13181 rnode4_t *rp)
13182 13182 {
13183 13183 LOCKT4args *lockt_args;
13184 13184
13185 13185 ASSERT(nfs_zone() == VTOMI4(RTOV4(rp))->mi_zone);
13186 13186 ASSERT(ctype == NFS4_LCK_CTYPE_NORM);
13187 13187 argop->argop = OP_LOCKT;
13188 13188 argsp->ctag = TAG_LOCKT;
13189 13189 lockt_args = &argop->nfs_argop4_u.oplockt;
13190 13190
13191 13191 /*
13192 13192 * The locktype will be READ_LT unless it's
13193 13193 * a write lock. We do this because the Solaris
13194 13194 * system call allows the combination of
13195 13195 * F_UNLCK and F_GETLK* and so in that case the
13196 13196 * unlock is mapped to a read.
13197 13197 */
13198 13198 if (flk->l_type == F_WRLCK)
13199 13199 lockt_args->locktype = WRITE_LT;
13200 13200 else
13201 13201 lockt_args->locktype = READ_LT;
13202 13202
13203 13203 lockt_args->owner.clientid = mi2clientid(VTOMI4(RTOV4(rp)));
13204 13204 /* set the lock owner4 args */
13205 13205 nfs4_setlockowner_args(&lockt_args->owner, rp,
13206 13206 ctype == NFS4_LCK_CTYPE_NORM ? curproc->p_pidp->pid_id :
13207 13207 flk->l_pid);
13208 13208 lockt_args->offset = flk->l_start;
13209 13209 lockt_args->length = flk->l_len;
13210 13210 if (flk->l_len == 0)
13211 13211 lockt_args->length = ~lockt_args->length;
13212 13212
13213 13213 *lockt_argsp = lockt_args;
13214 13214 }
13215 13215
13216 13216 /*
13217 13217 * If the client is holding a delegation, and the open stream to be used
13218 13218 * with this lock request is a delegation open stream, then re-open the stream.
13219 13219 * Sets the nfs4_error_t to all zeros unless the open stream has already
13220 13220 * failed a reopen or we couldn't find the open stream. NFS4ERR_DELAY
13221 13221 * means the caller should retry (like a recovery retry).
13222 13222 */
13223 13223 static void
13224 13224 nfs4frlock_check_deleg(vnode_t *vp, nfs4_error_t *ep, cred_t *cr, int lt)
13225 13225 {
13226 13226 open_delegation_type4 dt;
13227 13227 bool_t reopen_needed, force;
13228 13228 nfs4_open_stream_t *osp;
13229 13229 open_claim_type4 oclaim;
13230 13230 rnode4_t *rp = VTOR4(vp);
13231 13231 mntinfo4_t *mi = VTOMI4(vp);
13232 13232
13233 13233 ASSERT(nfs_zone() == mi->mi_zone);
13234 13234
13235 13235 nfs4_error_zinit(ep);
13236 13236
13237 13237 mutex_enter(&rp->r_statev4_lock);
13238 13238 dt = rp->r_deleg_type;
13239 13239 mutex_exit(&rp->r_statev4_lock);
13240 13240
13241 13241 if (dt != OPEN_DELEGATE_NONE) {
13242 13242 nfs4_open_owner_t *oop;
13243 13243
13244 13244 oop = find_open_owner(cr, NFS4_PERM_CREATED, mi);
13245 13245 if (!oop) {
13246 13246 ep->stat = NFS4ERR_IO;
13247 13247 return;
13248 13248 }
13249 13249 /* returns with 'os_sync_lock' held */
13250 13250 osp = find_open_stream(oop, rp);
13251 13251 if (!osp) {
13252 13252 open_owner_rele(oop);
13253 13253 ep->stat = NFS4ERR_IO;
13254 13254 return;
13255 13255 }
13256 13256
13257 13257 if (osp->os_failed_reopen) {
13258 13258 NFS4_DEBUG((nfs4_open_stream_debug ||
13259 13259 nfs4_client_lock_debug), (CE_NOTE,
13260 13260 "nfs4frlock_check_deleg: os_failed_reopen set "
13261 13261 "for osp %p, cr %p, rp %s", (void *)osp,
13262 13262 (void *)cr, rnode4info(rp)));
13263 13263 mutex_exit(&osp->os_sync_lock);
13264 13264 open_stream_rele(osp, rp);
13265 13265 open_owner_rele(oop);
13266 13266 ep->stat = NFS4ERR_IO;
13267 13267 return;
13268 13268 }
13269 13269
13270 13270 /*
13271 13271 * Determine whether a reopen is needed. If this
13272 13272 * is a delegation open stream, then send the open
13273 13273 * to the server to give visibility to the open owner.
13274 13274 * Even if it isn't a delegation open stream, we need
13275 13275 * to check if the previous open CLAIM_DELEGATE_CUR
13276 13276 * was sufficient.
13277 13277 */
13278 13278
13279 13279 reopen_needed = osp->os_delegation ||
13280 13280 ((lt == F_RDLCK &&
13281 13281 !(osp->os_dc_openacc & OPEN4_SHARE_ACCESS_READ)) ||
13282 13282 (lt == F_WRLCK &&
13283 13283 !(osp->os_dc_openacc & OPEN4_SHARE_ACCESS_WRITE)));
13284 13284
13285 13285 mutex_exit(&osp->os_sync_lock);
13286 13286 open_owner_rele(oop);
13287 13287
13288 13288 if (reopen_needed) {
13289 13289 /*
13290 13290 * Always use CLAIM_PREVIOUS after server reboot.
13291 13291 * The server will reject CLAIM_DELEGATE_CUR if
13292 13292 * it is used during the grace period.
13293 13293 */
13294 13294 mutex_enter(&mi->mi_lock);
13295 13295 if (mi->mi_recovflags & MI4R_SRV_REBOOT) {
13296 13296 oclaim = CLAIM_PREVIOUS;
13297 13297 force = TRUE;
13298 13298 } else {
13299 13299 oclaim = CLAIM_DELEGATE_CUR;
13300 13300 force = FALSE;
13301 13301 }
13302 13302 mutex_exit(&mi->mi_lock);
13303 13303
13304 13304 nfs4_reopen(vp, osp, ep, oclaim, force, FALSE);
13305 13305 if (ep->error == EAGAIN) {
13306 13306 nfs4_error_zinit(ep);
13307 13307 ep->stat = NFS4ERR_DELAY;
13308 13308 }
13309 13309 }
13310 13310 open_stream_rele(osp, rp);
13311 13311 osp = NULL;
13312 13312 }
13313 13313 }
13314 13314
13315 13315 /*
13316 13316 * Setup the LOCKU4 arguments.
13317 13317 * Returns errors via the nfs4_error_t.
13318 13318 * NFS4_OK no problems. *go_otwp is TRUE if call should go
13319 13319 * over-the-wire. The caller must release the
13320 13320 * reference on *lopp.
13321 13321 * NFS4ERR_DELAY caller should retry (like recovery retry)
13322 13322 * (other) unrecoverable error.
13323 13323 */
13324 13324 static void
13325 13325 nfs4frlock_setup_locku_args(nfs4_lock_call_type_t ctype, nfs_argop4 *argop,
13326 13326 LOCKU4args **locku_argsp, flock64_t *flk,
13327 13327 nfs4_lock_owner_t **lopp, nfs4_error_t *ep, COMPOUND4args_clnt *argsp,
13328 13328 vnode_t *vp, int flag, u_offset_t offset, cred_t *cr,
13329 13329 bool_t *skip_get_err, bool_t *go_otwp)
13330 13330 {
13331 13331 nfs4_lock_owner_t *lop = NULL;
13332 13332 LOCKU4args *locku_args;
13333 13333 pid_t pid;
13334 13334 bool_t is_spec = FALSE;
13335 13335 rnode4_t *rp = VTOR4(vp);
13336 13336
13337 13337 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
13338 13338 ASSERT(ctype == NFS4_LCK_CTYPE_NORM);
13339 13339
13340 13340 nfs4frlock_check_deleg(vp, ep, cr, F_UNLCK);
13341 13341 if (ep->error || ep->stat)
13342 13342 return;
13343 13343
13344 13344 argop->argop = OP_LOCKU;
13345 13345 if (ctype == NFS4_LCK_CTYPE_REINSTATE)
13346 13346 argsp->ctag = TAG_LOCKU_REINSTATE;
13347 13347 else
13348 13348 argsp->ctag = TAG_LOCKU;
13349 13349 locku_args = &argop->nfs_argop4_u.oplocku;
13350 13350 *locku_argsp = locku_args;
13351 13351
13352 13352 /*
13353 13353 * XXX what should locku_args->locktype be?
13354 13354 * setting to ALWAYS be READ_LT so at least
13355 13355 * it is a valid locktype.
13356 13356 */
13357 13357
13358 13358 locku_args->locktype = READ_LT;
13359 13359
13360 13360 pid = ctype == NFS4_LCK_CTYPE_NORM ? curproc->p_pidp->pid_id :
13361 13361 flk->l_pid;
13362 13362
13363 13363 /*
13364 13364 * Get the lock owner stateid. If no lock owner
13365 13365 * exists, return success.
13366 13366 */
13367 13367 lop = find_lock_owner(rp, pid, LOWN_ANY);
13368 13368 *lopp = lop;
13369 13369 if (lop && CLNT_ISSPECIAL(&lop->lock_stateid))
13370 13370 is_spec = TRUE;
13371 13371 if (!lop || is_spec) {
13372 13372 /*
13373 13373 * No lock owner so no locks to unlock.
13374 13374 * Return success. If there was a failed
13375 13375 * reclaim earlier, the lock might still be
13376 13376 * registered with the local locking code,
13377 13377 * so notify it of the unlock.
13378 13378 *
13379 13379 * If the lockowner is using a special stateid,
13380 13380 * then the original lock request (that created
13381 13381 * this lockowner) was never successful, so we
13382 13382 * have no lock to undo OTW.
13383 13383 */
13384 13384 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
13385 13385 "nfs4frlock_setup_locku_args: LOCKU: no lock owner "
13386 13386 "(%ld) so return success", (long)pid));
13387 13387
13388 13388 if (ctype == NFS4_LCK_CTYPE_NORM)
13389 13389 flk->l_pid = curproc->p_pid;
13390 13390 nfs4_register_lock_locally(vp, flk, flag, offset);
13391 13391 /*
13392 13392 * Release our hold and NULL out so final_cleanup
13393 13393 * doesn't try to end a lock seqid sync we
13394 13394 * never started.
13395 13395 */
13396 13396 if (is_spec) {
13397 13397 lock_owner_rele(lop);
13398 13398 *lopp = NULL;
13399 13399 }
13400 13400 *skip_get_err = TRUE;
13401 13401 *go_otwp = FALSE;
13402 13402 return;
13403 13403 }
13404 13404
13405 13405 ep->error = nfs4_start_lock_seqid_sync(lop, VTOMI4(vp));
13406 13406 if (ep->error == EAGAIN) {
13407 13407 lock_owner_rele(lop);
13408 13408 *lopp = NULL;
13409 13409 return;
13410 13410 }
13411 13411
13412 13412 mutex_enter(&lop->lo_lock);
13413 13413 locku_args->lock_stateid = lop->lock_stateid;
13414 13414 mutex_exit(&lop->lo_lock);
13415 13415 locku_args->seqid = lop->lock_seqid + 1;
13416 13416
13417 13417 /* leave the ref count on lop, rele after RPC call */
13418 13418
13419 13419 locku_args->offset = flk->l_start;
13420 13420 locku_args->length = flk->l_len;
13421 13421 if (flk->l_len == 0)
13422 13422 locku_args->length = ~locku_args->length;
13423 13423
13424 13424 *go_otwp = TRUE;
13425 13425 }
13426 13426
13427 13427 /*
13428 13428 * Setup the LOCK4 arguments.
13429 13429 *
13430 13430 * Returns errors via the nfs4_error_t.
13431 13431 * NFS4_OK no problems
13432 13432 * NFS4ERR_DELAY caller should retry (like recovery retry)
13433 13433 * (other) unrecoverable error
13434 13434 */
13435 13435 static void
13436 13436 nfs4frlock_setup_lock_args(nfs4_lock_call_type_t ctype, LOCK4args **lock_argsp,
13437 13437 nfs4_open_owner_t **oopp, nfs4_open_stream_t **ospp,
13438 13438 nfs4_lock_owner_t **lopp, nfs_argop4 *argop, COMPOUND4args_clnt *argsp,
13439 13439 flock64_t *flk, int cmd, vnode_t *vp, cred_t *cr, nfs4_error_t *ep)
13440 13440 {
13441 13441 LOCK4args *lock_args;
13442 13442 nfs4_open_owner_t *oop = NULL;
13443 13443 nfs4_open_stream_t *osp = NULL;
13444 13444 nfs4_lock_owner_t *lop = NULL;
13445 13445 pid_t pid;
13446 13446 rnode4_t *rp = VTOR4(vp);
13447 13447
13448 13448 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
13449 13449
13450 13450 nfs4frlock_check_deleg(vp, ep, cr, flk->l_type);
13451 13451 if (ep->error || ep->stat != NFS4_OK)
13452 13452 return;
13453 13453
13454 13454 argop->argop = OP_LOCK;
13455 13455 if (ctype == NFS4_LCK_CTYPE_NORM)
13456 13456 argsp->ctag = TAG_LOCK;
13457 13457 else if (ctype == NFS4_LCK_CTYPE_RECLAIM)
13458 13458 argsp->ctag = TAG_RELOCK;
13459 13459 else
13460 13460 argsp->ctag = TAG_LOCK_REINSTATE;
13461 13461 lock_args = &argop->nfs_argop4_u.oplock;
13462 13462 lock_args->locktype = flk_to_locktype(cmd, flk->l_type);
13463 13463 lock_args->reclaim = ctype == NFS4_LCK_CTYPE_RECLAIM ? 1 : 0;
13464 13464 /*
13465 13465 * Get the lock owner. If no lock owner exists,
13466 13466 * create a 'temporary' one and grab the open seqid
13467 13467 * synchronization (which puts a hold on the open
13468 13468 * owner and open stream).
13469 13469 * This also grabs the lock seqid synchronization.
13470 13470 */
13471 13471 pid = ctype == NFS4_LCK_CTYPE_NORM ? curproc->p_pid : flk->l_pid;
13472 13472 ep->stat =
13473 13473 nfs4_find_or_create_lock_owner(pid, rp, cr, &oop, &osp, &lop);
13474 13474
13475 13475 if (ep->stat != NFS4_OK)
13476 13476 goto out;
13477 13477
13478 13478 nfs4_setup_lock_args(lop, oop, osp, mi2clientid(VTOMI4(vp)),
13479 13479 &lock_args->locker);
13480 13480
13481 13481 lock_args->offset = flk->l_start;
13482 13482 lock_args->length = flk->l_len;
13483 13483 if (flk->l_len == 0)
13484 13484 lock_args->length = ~lock_args->length;
13485 13485 *lock_argsp = lock_args;
13486 13486 out:
13487 13487 *oopp = oop;
13488 13488 *ospp = osp;
13489 13489 *lopp = lop;
13490 13490 }
13491 13491
13492 13492 /*
13493 13493 * After we get the reply from the server, record the proper information
13494 13494 * for possible resend lock requests.
13495 13495 *
13496 13496 * Allocates memory for the saved_rqstp if we have a lost lock to save.
13497 13497 */
13498 13498 static void
13499 13499 nfs4frlock_save_lost_rqst(nfs4_lock_call_type_t ctype, int error,
13500 13500 nfs_lock_type4 locktype, nfs4_open_owner_t *oop,
13501 13501 nfs4_open_stream_t *osp, nfs4_lock_owner_t *lop, flock64_t *flk,
13502 13502 nfs4_lost_rqst_t *lost_rqstp, cred_t *cr, vnode_t *vp)
13503 13503 {
13504 13504 bool_t unlock = (flk->l_type == F_UNLCK);
13505 13505
13506 13506 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
13507 13507 ASSERT(ctype == NFS4_LCK_CTYPE_NORM ||
13508 13508 ctype == NFS4_LCK_CTYPE_REINSTATE);
13509 13509
13510 13510 if (error != 0 && !unlock) {
13511 13511 NFS4_DEBUG((nfs4_lost_rqst_debug ||
13512 13512 nfs4_client_lock_debug), (CE_NOTE,
13513 13513 "nfs4frlock_save_lost_rqst: set lo_pending_rqsts to 1 "
13514 13514 " for lop %p", (void *)lop));
13515 13515 ASSERT(lop != NULL);
13516 13516 mutex_enter(&lop->lo_lock);
13517 13517 lop->lo_pending_rqsts = 1;
13518 13518 mutex_exit(&lop->lo_lock);
13519 13519 }
13520 13520
13521 13521 lost_rqstp->lr_putfirst = FALSE;
13522 13522 lost_rqstp->lr_op = 0;
13523 13523
13524 13524 /*
13525 13525 * For lock/locku requests, we treat EINTR as ETIMEDOUT for
13526 13526 * recovery purposes so that the lock request that was sent
13527 13527 * can be saved and re-issued later. Ditto for EIO from a forced
13528 13528 * unmount. This is done to have the client's local locking state
13529 13529 * match the v4 server's state; that is, the request was
13530 13530 * potentially received and accepted by the server but the client
13531 13531 * thinks it was not.
13532 13532 */
13533 13533 if (error == ETIMEDOUT || error == EINTR ||
13534 13534 NFS4_FRC_UNMT_ERR(error, vp->v_vfsp)) {
13535 13535 NFS4_DEBUG((nfs4_lost_rqst_debug ||
13536 13536 nfs4_client_lock_debug), (CE_NOTE,
13537 13537 "nfs4frlock_save_lost_rqst: got a lost %s lock for "
13538 13538 "lop %p oop %p osp %p", unlock ? "LOCKU" : "LOCK",
13539 13539 (void *)lop, (void *)oop, (void *)osp));
13540 13540 if (unlock)
13541 13541 lost_rqstp->lr_op = OP_LOCKU;
13542 13542 else {
13543 13543 lost_rqstp->lr_op = OP_LOCK;
13544 13544 lost_rqstp->lr_locktype = locktype;
13545 13545 }
13546 13546 /*
13547 13547 * Objects are held and rele'd via the recovery code.
13548 13548 * See nfs4_save_lost_rqst.
13549 13549 */
13550 13550 lost_rqstp->lr_vp = vp;
13551 13551 lost_rqstp->lr_dvp = NULL;
13552 13552 lost_rqstp->lr_oop = oop;
13553 13553 lost_rqstp->lr_osp = osp;
13554 13554 lost_rqstp->lr_lop = lop;
13555 13555 lost_rqstp->lr_cr = cr;
13556 13556 switch (ctype) {
13557 13557 case NFS4_LCK_CTYPE_NORM:
13558 13558 flk->l_pid = ttoproc(curthread)->p_pid;
13559 13559 lost_rqstp->lr_ctype = NFS4_LCK_CTYPE_RESEND;
13560 13560 break;
13561 13561 case NFS4_LCK_CTYPE_REINSTATE:
13562 13562 lost_rqstp->lr_putfirst = TRUE;
13563 13563 lost_rqstp->lr_ctype = ctype;
13564 13564 break;
13565 13565 default:
13566 13566 break;
13567 13567 }
13568 13568 lost_rqstp->lr_flk = flk;
13569 13569 }
13570 13570 }
13571 13571
13572 13572 /*
13573 13573 * Update lop's seqid. Also update the seqid stored in a resend request,
13574 13574 * if any. (Some recovery errors increment the seqid, and we may have to
13575 13575 * send the resend request again.)
13576 13576 */
13577 13577
13578 13578 static void
13579 13579 nfs4frlock_bump_seqid(LOCK4args *lock_args, LOCKU4args *locku_args,
13580 13580 nfs4_open_owner_t *oop, nfs4_lock_owner_t *lop, nfs4_tag_type_t tag_type)
13581 13581 {
13582 13582 if (lock_args) {
13583 13583 if (lock_args->locker.new_lock_owner == TRUE)
13584 13584 nfs4_get_and_set_next_open_seqid(oop, tag_type);
13585 13585 else {
13586 13586 ASSERT(lop->lo_flags & NFS4_LOCK_SEQID_INUSE);
13587 13587 nfs4_set_lock_seqid(lop->lock_seqid + 1, lop);
13588 13588 }
13589 13589 } else if (locku_args) {
13590 13590 ASSERT(lop->lo_flags & NFS4_LOCK_SEQID_INUSE);
13591 13591 nfs4_set_lock_seqid(lop->lock_seqid +1, lop);
13592 13592 }
13593 13593 }
13594 13594
13595 13595 /*
13596 13596 * Calls nfs4_end_fop, drops the seqid syncs, and frees up the
13597 13597 * COMPOUND4 args/res for calls that need to retry.
13598 13598 * Switches the *cred_otwp to base_cr.
13599 13599 */
13600 13600 static void
13601 13601 nfs4frlock_check_access(vnode_t *vp, nfs4_op_hint_t op_hint,
13602 13602 nfs4_recov_state_t *recov_statep, int needrecov, bool_t *did_start_fop,
13603 13603 COMPOUND4args_clnt **argspp, COMPOUND4res_clnt **respp, int error,
13604 13604 nfs4_lock_owner_t **lopp, nfs4_open_owner_t **oopp,
13605 13605 nfs4_open_stream_t **ospp, cred_t *base_cr, cred_t **cred_otwp)
13606 13606 {
13607 13607 nfs4_open_owner_t *oop = *oopp;
13608 13608 nfs4_open_stream_t *osp = *ospp;
13609 13609 nfs4_lock_owner_t *lop = *lopp;
13610 13610 nfs_argop4 *argop = (*argspp)->array;
13611 13611
13612 13612 if (*did_start_fop) {
13613 13613 nfs4_end_fop(VTOMI4(vp), vp, NULL, op_hint, recov_statep,
13614 13614 needrecov);
13615 13615 *did_start_fop = FALSE;
13616 13616 }
13617 13617 ASSERT((*argspp)->array_len == 2);
13618 13618 if (argop[1].argop == OP_LOCK)
13619 13619 nfs4args_lock_free(&argop[1]);
13620 13620 else if (argop[1].argop == OP_LOCKT)
13621 13621 nfs4args_lockt_free(&argop[1]);
13622 13622 kmem_free(argop, 2 * sizeof (nfs_argop4));
13623 13623 if (!error)
13624 13624 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)*respp);
13625 13625 *argspp = NULL;
13626 13626 *respp = NULL;
13627 13627
13628 13628 if (lop) {
13629 13629 nfs4_end_lock_seqid_sync(lop);
13630 13630 lock_owner_rele(lop);
13631 13631 *lopp = NULL;
13632 13632 }
13633 13633
13634 13634 /* need to free up the reference on osp for lock args */
13635 13635 if (osp != NULL) {
13636 13636 open_stream_rele(osp, VTOR4(vp));
13637 13637 *ospp = NULL;
13638 13638 }
13639 13639
13640 13640 /* need to free up the reference on oop for lock args */
13641 13641 if (oop != NULL) {
13642 13642 nfs4_end_open_seqid_sync(oop);
13643 13643 open_owner_rele(oop);
13644 13644 *oopp = NULL;
13645 13645 }
13646 13646
13647 13647 crfree(*cred_otwp);
13648 13648 *cred_otwp = base_cr;
13649 13649 crhold(*cred_otwp);
13650 13650 }
13651 13651
13652 13652 /*
13653 13653 * Function to process the client's recovery for nfs4frlock.
13654 13654 * Returns TRUE if we should retry the lock request; FALSE otherwise.
13655 13655 *
13656 13656 * Calls nfs4_end_fop, drops the seqid syncs, and frees up the
13657 13657 * COMPOUND4 args/res for calls that need to retry.
13658 13658 *
13659 13659 * Note: the rp's r_lkserlock is *not* dropped during this path.
13660 13660 */
13661 13661 static bool_t
13662 13662 nfs4frlock_recovery(int needrecov, nfs4_error_t *ep,
13663 13663 COMPOUND4args_clnt **argspp, COMPOUND4res_clnt **respp,
13664 13664 LOCK4args *lock_args, LOCKU4args *locku_args,
13665 13665 nfs4_open_owner_t **oopp, nfs4_open_stream_t **ospp,
13666 13666 nfs4_lock_owner_t **lopp, rnode4_t *rp, vnode_t *vp,
13667 13667 nfs4_recov_state_t *recov_statep, nfs4_op_hint_t op_hint,
13668 13668 bool_t *did_start_fop, nfs4_lost_rqst_t *lost_rqstp, flock64_t *flk)
13669 13669 {
13670 13670 nfs4_open_owner_t *oop = *oopp;
13671 13671 nfs4_open_stream_t *osp = *ospp;
13672 13672 nfs4_lock_owner_t *lop = *lopp;
13673 13673
13674 13674 bool_t abort, retry;
13675 13675
13676 13676 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
13677 13677 ASSERT((*argspp) != NULL);
13678 13678 ASSERT((*respp) != NULL);
13679 13679 if (lock_args || locku_args)
13680 13680 ASSERT(lop != NULL);
13681 13681
13682 13682 NFS4_DEBUG((nfs4_client_lock_debug || nfs4_client_recov_debug),
13683 13683 (CE_NOTE, "nfs4frlock_recovery: initiating recovery\n"));
13684 13684
13685 13685 retry = TRUE;
13686 13686 abort = FALSE;
13687 13687 if (needrecov) {
13688 13688 nfs4_bseqid_entry_t *bsep = NULL;
13689 13689 nfs_opnum4 op;
13690 13690
13691 13691 op = lock_args ? OP_LOCK : locku_args ? OP_LOCKU : OP_LOCKT;
13692 13692
13693 13693 if (!ep->error && ep->stat == NFS4ERR_BAD_SEQID) {
13694 13694 seqid4 seqid;
13695 13695
13696 13696 if (lock_args) {
13697 13697 if (lock_args->locker.new_lock_owner == TRUE)
13698 13698 seqid = lock_args->locker.locker4_u.
13699 13699 open_owner.open_seqid;
13700 13700 else
13701 13701 seqid = lock_args->locker.locker4_u.
13702 13702 lock_owner.lock_seqid;
13703 13703 } else if (locku_args) {
13704 13704 seqid = locku_args->seqid;
13705 13705 } else {
13706 13706 seqid = 0;
13707 13707 }
13708 13708
13709 13709 bsep = nfs4_create_bseqid_entry(oop, lop, vp,
13710 13710 flk->l_pid, (*argspp)->ctag, seqid);
13711 13711 }
13712 13712
13713 13713 abort = nfs4_start_recovery(ep, VTOMI4(vp), vp, NULL, NULL,
13714 13714 (lost_rqstp && (lost_rqstp->lr_op == OP_LOCK ||
13715 13715 lost_rqstp->lr_op == OP_LOCKU)) ? lost_rqstp :
13716 13716 NULL, op, bsep, NULL, NULL);
13717 13717
13718 13718 if (bsep)
13719 13719 kmem_free(bsep, sizeof (*bsep));
13720 13720 }
13721 13721
13722 13722 /*
13723 13723 * Return that we do not want to retry the request for 3 cases:
13724 13724 * 1. If we received EINTR or are bailing out because of a forced
13725 13725 * unmount, we came into this code path just for the sake of
13726 13726 * initiating recovery, we now need to return the error.
13727 13727 * 2. If we have aborted recovery.
13728 13728 * 3. We received NFS4ERR_BAD_SEQID.
13729 13729 */
13730 13730 if (ep->error == EINTR || NFS4_FRC_UNMT_ERR(ep->error, vp->v_vfsp) ||
13731 13731 abort == TRUE || (ep->error == 0 && ep->stat == NFS4ERR_BAD_SEQID))
13732 13732 retry = FALSE;
13733 13733
13734 13734 if (*did_start_fop == TRUE) {
13735 13735 nfs4_end_fop(VTOMI4(vp), vp, NULL, op_hint, recov_statep,
13736 13736 needrecov);
13737 13737 *did_start_fop = FALSE;
13738 13738 }
13739 13739
13740 13740 if (retry == TRUE) {
13741 13741 nfs_argop4 *argop;
13742 13742
13743 13743 argop = (*argspp)->array;
13744 13744 ASSERT((*argspp)->array_len == 2);
13745 13745
13746 13746 if (argop[1].argop == OP_LOCK)
13747 13747 nfs4args_lock_free(&argop[1]);
13748 13748 else if (argop[1].argop == OP_LOCKT)
13749 13749 nfs4args_lockt_free(&argop[1]);
13750 13750 kmem_free(argop, 2 * sizeof (nfs_argop4));
13751 13751 if (!ep->error)
13752 13752 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)*respp);
13753 13753 *respp = NULL;
13754 13754 *argspp = NULL;
13755 13755 }
13756 13756
13757 13757 if (lop != NULL) {
13758 13758 nfs4_end_lock_seqid_sync(lop);
13759 13759 lock_owner_rele(lop);
13760 13760 }
13761 13761
13762 13762 *lopp = NULL;
13763 13763
13764 13764 /* need to free up the reference on osp for lock args */
13765 13765 if (osp != NULL) {
13766 13766 open_stream_rele(osp, rp);
13767 13767 *ospp = NULL;
13768 13768 }
13769 13769
13770 13770 /* need to free up the reference on oop for lock args */
13771 13771 if (oop != NULL) {
13772 13772 nfs4_end_open_seqid_sync(oop);
13773 13773 open_owner_rele(oop);
13774 13774 *oopp = NULL;
13775 13775 }
13776 13776
13777 13777 return (retry);
13778 13778 }
13779 13779
13780 13780 /*
13781 13781 * Handles the successful reply from the server for nfs4frlock.
13782 13782 */
13783 13783 static void
13784 13784 nfs4frlock_results_ok(nfs4_lock_call_type_t ctype, int cmd, flock64_t *flk,
13785 13785 vnode_t *vp, int flag, u_offset_t offset,
13786 13786 nfs4_lost_rqst_t *resend_rqstp)
13787 13787 {
13788 13788 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
13789 13789 if ((cmd == F_SETLK || cmd == F_SETLKW) &&
13790 13790 (flk->l_type == F_RDLCK || flk->l_type == F_WRLCK)) {
13791 13791 if (ctype == NFS4_LCK_CTYPE_NORM) {
13792 13792 flk->l_pid = ttoproc(curthread)->p_pid;
13793 13793 /*
13794 13794 * We do not register lost locks locally in
13795 13795 * the 'resend' case since the user/application
13796 13796 * doesn't think we have the lock.
13797 13797 */
13798 13798 ASSERT(!resend_rqstp);
13799 13799 nfs4_register_lock_locally(vp, flk, flag, offset);
13800 13800 }
13801 13801 }
13802 13802 }
13803 13803
13804 13804 /*
13805 13805 * Handle the DENIED reply from the server for nfs4frlock.
13806 13806 * Returns TRUE if we should retry the request; FALSE otherwise.
13807 13807 *
13808 13808 * Calls nfs4_end_fop, drops the seqid syncs, and frees up the
13809 13809 * COMPOUND4 args/res for calls that need to retry. Can also
13810 13810 * drop and regrab the r_lkserlock.
13811 13811 */
13812 13812 static bool_t
13813 13813 nfs4frlock_results_denied(nfs4_lock_call_type_t ctype, LOCK4args *lock_args,
13814 13814 LOCKT4args *lockt_args, nfs4_open_owner_t **oopp,
13815 13815 nfs4_open_stream_t **ospp, nfs4_lock_owner_t **lopp, int cmd,
13816 13816 vnode_t *vp, flock64_t *flk, nfs4_op_hint_t op_hint,
13817 13817 nfs4_recov_state_t *recov_statep, int needrecov,
13818 13818 COMPOUND4args_clnt **argspp, COMPOUND4res_clnt **respp,
13819 13819 clock_t *tick_delayp, short *whencep, int *errorp,
13820 13820 nfs_resop4 *resop, cred_t *cr, bool_t *did_start_fop,
13821 13821 bool_t *skip_get_err)
13822 13822 {
13823 13823 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
13824 13824
13825 13825 if (lock_args) {
13826 13826 nfs4_open_owner_t *oop = *oopp;
13827 13827 nfs4_open_stream_t *osp = *ospp;
13828 13828 nfs4_lock_owner_t *lop = *lopp;
13829 13829 int intr;
13830 13830
13831 13831 /*
13832 13832 * Blocking lock needs to sleep and retry from the request.
13833 13833 *
13834 13834 * Do not block and wait for 'resend' or 'reinstate'
13835 13835 * lock requests, just return the error.
13836 13836 *
13837 13837 * Note: reclaim requests have cmd == F_SETLK, not F_SETLKW.
13838 13838 */
13839 13839 if (cmd == F_SETLKW) {
13840 13840 rnode4_t *rp = VTOR4(vp);
13841 13841 nfs_argop4 *argop = (*argspp)->array;
13842 13842
13843 13843 ASSERT(ctype == NFS4_LCK_CTYPE_NORM);
13844 13844
13845 13845 nfs4_end_fop(VTOMI4(vp), vp, NULL, op_hint,
13846 13846 recov_statep, needrecov);
13847 13847 *did_start_fop = FALSE;
13848 13848 ASSERT((*argspp)->array_len == 2);
13849 13849 if (argop[1].argop == OP_LOCK)
13850 13850 nfs4args_lock_free(&argop[1]);
13851 13851 else if (argop[1].argop == OP_LOCKT)
13852 13852 nfs4args_lockt_free(&argop[1]);
13853 13853 kmem_free(argop, 2 * sizeof (nfs_argop4));
13854 13854 if (*respp)
13855 13855 (void) xdr_free(xdr_COMPOUND4res_clnt,
13856 13856 (caddr_t)*respp);
13857 13857 *argspp = NULL;
13858 13858 *respp = NULL;
13859 13859 nfs4_end_lock_seqid_sync(lop);
13860 13860 lock_owner_rele(lop);
13861 13861 *lopp = NULL;
13862 13862 if (osp != NULL) {
13863 13863 open_stream_rele(osp, rp);
13864 13864 *ospp = NULL;
13865 13865 }
13866 13866 if (oop != NULL) {
13867 13867 nfs4_end_open_seqid_sync(oop);
13868 13868 open_owner_rele(oop);
13869 13869 *oopp = NULL;
13870 13870 }
13871 13871
13872 13872 nfs_rw_exit(&rp->r_lkserlock);
13873 13873
13874 13874 intr = nfs4_block_and_wait(tick_delayp, rp);
13875 13875
13876 13876 if (intr) {
13877 13877 (void) nfs_rw_enter_sig(&rp->r_lkserlock,
13878 13878 RW_WRITER, FALSE);
13879 13879 *errorp = EINTR;
13880 13880 return (FALSE);
13881 13881 }
13882 13882
13883 13883 (void) nfs_rw_enter_sig(&rp->r_lkserlock,
13884 13884 RW_WRITER, FALSE);
13885 13885
13886 13886 /*
13887 13887 * Make sure we are still safe to lock with
13888 13888 * regards to mmapping.
13889 13889 */
13890 13890 if (!nfs4_safelock(vp, flk, cr)) {
13891 13891 *errorp = EAGAIN;
13892 13892 return (FALSE);
13893 13893 }
13894 13894
13895 13895 return (TRUE);
13896 13896 }
13897 13897 if (ctype == NFS4_LCK_CTYPE_NORM)
13898 13898 *errorp = EAGAIN;
13899 13899 *skip_get_err = TRUE;
13900 13900 flk->l_whence = 0;
13901 13901 *whencep = 0;
13902 13902 return (FALSE);
13903 13903 } else if (lockt_args) {
13904 13904 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
13905 13905 "nfs4frlock_results_denied: OP_LOCKT DENIED"));
13906 13906
13907 13907 denied_to_flk(&resop->nfs_resop4_u.oplockt.denied,
13908 13908 flk, lockt_args);
13909 13909
13910 13910 /* according to NLM code */
13911 13911 *errorp = 0;
13912 13912 *whencep = 0;
13913 13913 *skip_get_err = TRUE;
13914 13914 return (FALSE);
13915 13915 }
13916 13916 return (FALSE);
13917 13917 }
13918 13918
13919 13919 /*
13920 13920 * Handles all NFS4 errors besides NFS4_OK and NFS4ERR_DENIED for nfs4frlock.
13921 13921 */
13922 13922 static void
13923 13923 nfs4frlock_results_default(COMPOUND4res_clnt *resp, int *errorp)
13924 13924 {
13925 13925 switch (resp->status) {
13926 13926 case NFS4ERR_ACCESS:
13927 13927 case NFS4ERR_ADMIN_REVOKED:
13928 13928 case NFS4ERR_BADHANDLE:
13929 13929 case NFS4ERR_BAD_RANGE:
13930 13930 case NFS4ERR_BAD_SEQID:
13931 13931 case NFS4ERR_BAD_STATEID:
13932 13932 case NFS4ERR_BADXDR:
13933 13933 case NFS4ERR_DEADLOCK:
13934 13934 case NFS4ERR_DELAY:
13935 13935 case NFS4ERR_EXPIRED:
13936 13936 case NFS4ERR_FHEXPIRED:
13937 13937 case NFS4ERR_GRACE:
13938 13938 case NFS4ERR_INVAL:
13939 13939 case NFS4ERR_ISDIR:
13940 13940 case NFS4ERR_LEASE_MOVED:
13941 13941 case NFS4ERR_LOCK_NOTSUPP:
13942 13942 case NFS4ERR_LOCK_RANGE:
13943 13943 case NFS4ERR_MOVED:
13944 13944 case NFS4ERR_NOFILEHANDLE:
13945 13945 case NFS4ERR_NO_GRACE:
13946 13946 case NFS4ERR_OLD_STATEID:
13947 13947 case NFS4ERR_OPENMODE:
13948 13948 case NFS4ERR_RECLAIM_BAD:
13949 13949 case NFS4ERR_RECLAIM_CONFLICT:
13950 13950 case NFS4ERR_RESOURCE:
13951 13951 case NFS4ERR_SERVERFAULT:
13952 13952 case NFS4ERR_STALE:
13953 13953 case NFS4ERR_STALE_CLIENTID:
13954 13954 case NFS4ERR_STALE_STATEID:
13955 13955 return;
13956 13956 default:
13957 13957 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
13958 13958 "nfs4frlock_results_default: got unrecognizable "
13959 13959 "res.status %d", resp->status));
13960 13960 *errorp = NFS4ERR_INVAL;
13961 13961 }
13962 13962 }
13963 13963
13964 13964 /*
13965 13965 * The lock request was successful, so update the client's state.
13966 13966 */
13967 13967 static void
13968 13968 nfs4frlock_update_state(LOCK4args *lock_args, LOCKU4args *locku_args,
13969 13969 LOCKT4args *lockt_args, nfs_resop4 *resop, nfs4_lock_owner_t *lop,
13970 13970 vnode_t *vp, flock64_t *flk, cred_t *cr,
13971 13971 nfs4_lost_rqst_t *resend_rqstp)
13972 13972 {
13973 13973 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
13974 13974
13975 13975 if (lock_args) {
13976 13976 LOCK4res *lock_res;
13977 13977
13978 13978 lock_res = &resop->nfs_resop4_u.oplock;
13979 13979 /* update the stateid with server's response */
13980 13980
13981 13981 if (lock_args->locker.new_lock_owner == TRUE) {
13982 13982 mutex_enter(&lop->lo_lock);
13983 13983 lop->lo_just_created = NFS4_PERM_CREATED;
13984 13984 mutex_exit(&lop->lo_lock);
13985 13985 }
13986 13986
13987 13987 nfs4_set_lock_stateid(lop, lock_res->LOCK4res_u.lock_stateid);
13988 13988
13989 13989 /*
13990 13990 * If the lock was the result of a resending a lost
13991 13991 * request, we've synched up the stateid and seqid
13992 13992 * with the server, but now the server might be out of sync
13993 13993 * with what the application thinks it has for locks.
13994 13994 * Clean that up here. It's unclear whether we should do
13995 13995 * this even if the filesystem has been forcibly unmounted.
13996 13996 * For most servers, it's probably wasted effort, but
13997 13997 * RFC3530 lets servers require that unlocks exactly match
13998 13998 * the locks that are held.
13999 13999 */
14000 14000 if (resend_rqstp != NULL &&
14001 14001 resend_rqstp->lr_ctype != NFS4_LCK_CTYPE_REINSTATE) {
14002 14002 nfs4_reinstitute_local_lock_state(vp, flk, cr, lop);
14003 14003 } else {
14004 14004 flk->l_whence = 0;
14005 14005 }
14006 14006 } else if (locku_args) {
14007 14007 LOCKU4res *locku_res;
14008 14008
14009 14009 locku_res = &resop->nfs_resop4_u.oplocku;
14010 14010
14011 14011 /* Update the stateid with the server's response */
14012 14012 nfs4_set_lock_stateid(lop, locku_res->lock_stateid);
14013 14013 } else if (lockt_args) {
14014 14014 /* Switch the lock type to express success, see fcntl */
14015 14015 flk->l_type = F_UNLCK;
14016 14016 flk->l_whence = 0;
14017 14017 }
14018 14018 }
14019 14019
14020 14020 /*
14021 14021 * Do final cleanup before exiting nfs4frlock.
14022 14022 * Calls nfs4_end_fop, drops the seqid syncs, and frees up the
14023 14023 * COMPOUND4 args/res for calls that haven't already.
14024 14024 */
14025 14025 static void
14026 14026 nfs4frlock_final_cleanup(nfs4_lock_call_type_t ctype, COMPOUND4args_clnt *argsp,
14027 14027 COMPOUND4res_clnt *resp, vnode_t *vp, nfs4_op_hint_t op_hint,
14028 14028 nfs4_recov_state_t *recov_statep, int needrecov, nfs4_open_owner_t *oop,
14029 14029 nfs4_open_stream_t *osp, nfs4_lock_owner_t *lop, flock64_t *flk,
14030 14030 short whence, u_offset_t offset, struct lm_sysid *ls,
14031 14031 int *errorp, LOCK4args *lock_args, LOCKU4args *locku_args,
14032 14032 bool_t did_start_fop, bool_t skip_get_err,
14033 14033 cred_t *cred_otw, cred_t *cred)
14034 14034 {
14035 14035 mntinfo4_t *mi = VTOMI4(vp);
14036 14036 rnode4_t *rp = VTOR4(vp);
14037 14037 int error = *errorp;
14038 14038 nfs_argop4 *argop;
14039 14039 int do_flush_pages = 0;
14040 14040
14041 14041 ASSERT(nfs_zone() == mi->mi_zone);
14042 14042 /*
14043 14043 * The client recovery code wants the raw status information,
14044 14044 * so don't map the NFS status code to an errno value for
14045 14045 * non-normal call types.
14046 14046 */
14047 14047 if (ctype == NFS4_LCK_CTYPE_NORM) {
14048 14048 if (*errorp == 0 && resp != NULL && skip_get_err == FALSE)
14049 14049 *errorp = geterrno4(resp->status);
14050 14050 if (did_start_fop == TRUE)
14051 14051 nfs4_end_fop(mi, vp, NULL, op_hint, recov_statep,
14052 14052 needrecov);
14053 14053
14054 14054 /*
14055 14055 * We've established a new lock on the server, so invalidate
14056 14056 * the pages associated with the vnode to get the most up to
14057 14057 * date pages from the server after acquiring the lock. We
14058 14058 * want to be sure that the read operation gets the newest data.
14059 14059 * N.B.
14060 14060 * We used to do this in nfs4frlock_results_ok but that doesn't
14061 14061 * work since VOP_PUTPAGE can call nfs4_commit which calls
14062 14062 * nfs4_start_fop. We flush the pages below after calling
14063 14063 * nfs4_end_fop above
14064 14064 * The flush of the page cache must be done after
14065 14065 * nfs4_end_open_seqid_sync() to avoid a 4-way hang.
14066 14066 */
14067 14067 if (!error && resp && resp->status == NFS4_OK)
14068 14068 do_flush_pages = 1;
14069 14069 }
14070 14070 if (argsp) {
14071 14071 ASSERT(argsp->array_len == 2);
14072 14072 argop = argsp->array;
14073 14073 if (argop[1].argop == OP_LOCK)
14074 14074 nfs4args_lock_free(&argop[1]);
14075 14075 else if (argop[1].argop == OP_LOCKT)
14076 14076 nfs4args_lockt_free(&argop[1]);
14077 14077 kmem_free(argop, 2 * sizeof (nfs_argop4));
14078 14078 if (resp)
14079 14079 (void) xdr_free(xdr_COMPOUND4res_clnt, (caddr_t)resp);
14080 14080 }
14081 14081
14082 14082 /* free the reference on the lock owner */
14083 14083 if (lop != NULL) {
14084 14084 nfs4_end_lock_seqid_sync(lop);
14085 14085 lock_owner_rele(lop);
14086 14086 }
14087 14087
14088 14088 /* need to free up the reference on osp for lock args */
14089 14089 if (osp != NULL)
14090 14090 open_stream_rele(osp, rp);
14091 14091
14092 14092 /* need to free up the reference on oop for lock args */
14093 14093 if (oop != NULL) {
14094 14094 nfs4_end_open_seqid_sync(oop);
14095 14095 open_owner_rele(oop);
14096 14096 }
14097 14097
14098 14098 if (do_flush_pages)
14099 14099 nfs4_flush_pages(vp, cred);
14100 14100
14101 14101 (void) convoff(vp, flk, whence, offset);
14102 14102
14103 14103 lm_rel_sysid(ls);
14104 14104
14105 14105 /*
14106 14106 * Record debug information in the event we get EINVAL.
14107 14107 */
14108 14108 mutex_enter(&mi->mi_lock);
14109 14109 if (*errorp == EINVAL && (lock_args || locku_args) &&
14110 14110 (!(mi->mi_flags & MI4_POSIX_LOCK))) {
14111 14111 if (!(mi->mi_flags & MI4_LOCK_DEBUG)) {
14112 14112 zcmn_err(getzoneid(), CE_NOTE,
14113 14113 "%s operation failed with "
14114 14114 "EINVAL probably since the server, %s,"
14115 14115 " doesn't support POSIX style locking",
14116 14116 lock_args ? "LOCK" : "LOCKU",
14117 14117 mi->mi_curr_serv->sv_hostname);
14118 14118 mi->mi_flags |= MI4_LOCK_DEBUG;
14119 14119 }
14120 14120 }
14121 14121 mutex_exit(&mi->mi_lock);
14122 14122
14123 14123 if (cred_otw)
14124 14124 crfree(cred_otw);
14125 14125 }
14126 14126
14127 14127 /*
14128 14128 * This calls the server and the local locking code.
14129 14129 *
14130 14130 * Client locks are registerred locally by oring the sysid with
14131 14131 * LM_SYSID_CLIENT. The server registers locks locally using just the sysid.
14132 14132 * We need to distinguish between the two to avoid collision in case one
14133 14133 * machine is used as both client and server.
14134 14134 *
14135 14135 * Blocking lock requests will continually retry to acquire the lock
14136 14136 * forever.
14137 14137 *
14138 14138 * The ctype is defined as follows:
14139 14139 * NFS4_LCK_CTYPE_NORM: normal lock request.
14140 14140 *
14141 14141 * NFS4_LCK_CTYPE_RECLAIM: bypass the usual calls for synchronizing with client
14142 14142 * recovery, get the pid from flk instead of curproc, and don't reregister
14143 14143 * the lock locally.
14144 14144 *
14145 14145 * NFS4_LCK_CTYPE_RESEND: same as NFS4_LCK_CTYPE_RECLAIM, with the addition
14146 14146 * that we will use the information passed in via resend_rqstp to setup the
14147 14147 * lock/locku request. This resend is the exact same request as the 'lost
14148 14148 * lock', and is initiated by the recovery framework. A successful resend
14149 14149 * request can initiate one or more reinstate requests.
14150 14150 *
14151 14151 * NFS4_LCK_CTYPE_REINSTATE: same as NFS4_LCK_CTYPE_RESEND, except that it
14152 14152 * does not trigger additional reinstate requests. This lock call type is
14153 14153 * set for setting the v4 server's locking state back to match what the
14154 14154 * client's local locking state is in the event of a received 'lost lock'.
14155 14155 *
14156 14156 * Errors are returned via the nfs4_error_t parameter.
14157 14157 */
14158 14158 void
14159 14159 nfs4frlock(nfs4_lock_call_type_t ctype, vnode_t *vp, int cmd, flock64_t *flk,
14160 14160 int flag, u_offset_t offset, cred_t *cr, nfs4_error_t *ep,
14161 14161 nfs4_lost_rqst_t *resend_rqstp, int *did_reclaimp)
14162 14162 {
14163 14163 COMPOUND4args_clnt args, *argsp = NULL;
14164 14164 COMPOUND4res_clnt res, *resp = NULL;
14165 14165 nfs_argop4 *argop;
14166 14166 nfs_resop4 *resop;
14167 14167 rnode4_t *rp;
14168 14168 int doqueue = 1;
14169 14169 clock_t tick_delay; /* delay in clock ticks */
14170 14170 struct lm_sysid *ls;
14171 14171 LOCK4args *lock_args = NULL;
14172 14172 LOCKU4args *locku_args = NULL;
14173 14173 LOCKT4args *lockt_args = NULL;
14174 14174 nfs4_open_owner_t *oop = NULL;
14175 14175 nfs4_open_stream_t *osp = NULL;
14176 14176 nfs4_lock_owner_t *lop = NULL;
14177 14177 bool_t needrecov = FALSE;
14178 14178 nfs4_recov_state_t recov_state;
14179 14179 short whence;
14180 14180 nfs4_op_hint_t op_hint;
14181 14181 nfs4_lost_rqst_t lost_rqst;
14182 14182 bool_t retry = FALSE;
14183 14183 bool_t did_start_fop = FALSE;
14184 14184 bool_t skip_get_err = FALSE;
14185 14185 cred_t *cred_otw = NULL;
14186 14186 bool_t recovonly; /* just queue request */
14187 14187 int frc_no_reclaim = 0;
14188 14188 #ifdef DEBUG
14189 14189 char *name;
14190 14190 #endif
14191 14191
14192 14192 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
14193 14193
14194 14194 #ifdef DEBUG
14195 14195 name = fn_name(VTOSV(vp)->sv_name);
14196 14196 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE, "nfs4frlock: "
14197 14197 "%s: cmd %d, type %d, offset %llu, start %"PRIx64", "
14198 14198 "length %"PRIu64", pid %d, sysid %d, call type %s, "
14199 14199 "resend request %s", name, cmd, flk->l_type, offset, flk->l_start,
14200 14200 flk->l_len, ctype == NFS4_LCK_CTYPE_NORM ? curproc->p_pid :
14201 14201 flk->l_pid, flk->l_sysid, nfs4frlock_get_call_type(ctype),
14202 14202 resend_rqstp ? "TRUE" : "FALSE"));
14203 14203 kmem_free(name, MAXNAMELEN);
14204 14204 #endif
14205 14205
14206 14206 nfs4_error_zinit(ep);
14207 14207 ep->error = nfs4frlock_validate_args(cmd, flk, flag, vp, offset);
14208 14208 if (ep->error)
14209 14209 return;
14210 14210 ep->error = nfs4frlock_get_sysid(&ls, vp, flk);
14211 14211 if (ep->error)
14212 14212 return;
14213 14213 nfs4frlock_pre_setup(&tick_delay, &recov_state, flk, &whence,
14214 14214 vp, cr, &cred_otw);
14215 14215
14216 14216 recov_retry:
14217 14217 nfs4frlock_call_init(&args, &argsp, &argop, &op_hint, flk, cmd,
14218 14218 &retry, &did_start_fop, &resp, &skip_get_err, &lost_rqst);
14219 14219 rp = VTOR4(vp);
14220 14220
14221 14221 ep->error = nfs4frlock_start_call(ctype, vp, op_hint, &recov_state,
14222 14222 &did_start_fop, &recovonly);
14223 14223
14224 14224 if (ep->error)
14225 14225 goto out;
14226 14226
14227 14227 if (recovonly) {
14228 14228 /*
14229 14229 * Leave the request for the recovery system to deal with.
14230 14230 */
14231 14231 ASSERT(ctype == NFS4_LCK_CTYPE_NORM);
14232 14232 ASSERT(cmd != F_GETLK);
14233 14233 ASSERT(flk->l_type == F_UNLCK);
14234 14234
14235 14235 nfs4_error_init(ep, EINTR);
14236 14236 needrecov = TRUE;
14237 14237 lop = find_lock_owner(rp, curproc->p_pid, LOWN_ANY);
14238 14238 if (lop != NULL) {
14239 14239 nfs4frlock_save_lost_rqst(ctype, ep->error, READ_LT,
14240 14240 NULL, NULL, lop, flk, &lost_rqst, cr, vp);
14241 14241 (void) nfs4_start_recovery(ep,
14242 14242 VTOMI4(vp), vp, NULL, NULL,
14243 14243 (lost_rqst.lr_op == OP_LOCK ||
14244 14244 lost_rqst.lr_op == OP_LOCKU) ?
14245 14245 &lost_rqst : NULL, OP_LOCKU, NULL, NULL, NULL);
14246 14246 lock_owner_rele(lop);
14247 14247 lop = NULL;
14248 14248 }
14249 14249 flk->l_pid = curproc->p_pid;
14250 14250 nfs4_register_lock_locally(vp, flk, flag, offset);
14251 14251 goto out;
14252 14252 }
14253 14253
14254 14254 /* putfh directory fh */
14255 14255 argop[0].argop = OP_CPUTFH;
14256 14256 argop[0].nfs_argop4_u.opcputfh.sfh = rp->r_fh;
14257 14257
14258 14258 /*
14259 14259 * Set up the over-the-wire arguments and get references to the
14260 14260 * open owner, etc.
14261 14261 */
14262 14262
14263 14263 if (ctype == NFS4_LCK_CTYPE_RESEND ||
14264 14264 ctype == NFS4_LCK_CTYPE_REINSTATE) {
14265 14265 nfs4frlock_setup_resend_lock_args(resend_rqstp, argsp,
14266 14266 &argop[1], &lop, &oop, &osp, &lock_args, &locku_args);
14267 14267 } else {
14268 14268 bool_t go_otw = TRUE;
14269 14269
14270 14270 ASSERT(resend_rqstp == NULL);
14271 14271
14272 14272 switch (cmd) {
14273 14273 case F_GETLK:
14274 14274 case F_O_GETLK:
14275 14275 nfs4frlock_setup_lockt_args(ctype, &argop[1],
14276 14276 &lockt_args, argsp, flk, rp);
14277 14277 break;
14278 14278 case F_SETLKW:
14279 14279 case F_SETLK:
14280 14280 if (flk->l_type == F_UNLCK)
14281 14281 nfs4frlock_setup_locku_args(ctype,
14282 14282 &argop[1], &locku_args, flk,
14283 14283 &lop, ep, argsp,
14284 14284 vp, flag, offset, cr,
14285 14285 &skip_get_err, &go_otw);
14286 14286 else
14287 14287 nfs4frlock_setup_lock_args(ctype,
14288 14288 &lock_args, &oop, &osp, &lop, &argop[1],
14289 14289 argsp, flk, cmd, vp, cr, ep);
14290 14290
14291 14291 if (ep->error)
14292 14292 goto out;
14293 14293
14294 14294 switch (ep->stat) {
14295 14295 case NFS4_OK:
14296 14296 break;
14297 14297 case NFS4ERR_DELAY:
14298 14298 /* recov thread never gets this error */
14299 14299 ASSERT(resend_rqstp == NULL);
14300 14300 ASSERT(did_start_fop);
14301 14301
14302 14302 nfs4_end_fop(VTOMI4(vp), vp, NULL, op_hint,
14303 14303 &recov_state, TRUE);
14304 14304 did_start_fop = FALSE;
14305 14305 if (argop[1].argop == OP_LOCK)
14306 14306 nfs4args_lock_free(&argop[1]);
14307 14307 else if (argop[1].argop == OP_LOCKT)
14308 14308 nfs4args_lockt_free(&argop[1]);
14309 14309 kmem_free(argop, 2 * sizeof (nfs_argop4));
14310 14310 argsp = NULL;
14311 14311 goto recov_retry;
14312 14312 default:
14313 14313 ep->error = EIO;
14314 14314 goto out;
14315 14315 }
14316 14316 break;
14317 14317 default:
14318 14318 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
14319 14319 "nfs4_frlock: invalid cmd %d", cmd));
14320 14320 ep->error = EINVAL;
14321 14321 goto out;
14322 14322 }
14323 14323
14324 14324 if (!go_otw)
14325 14325 goto out;
14326 14326 }
14327 14327
14328 14328 /* XXX should we use the local reclock as a cache ? */
14329 14329 /*
14330 14330 * Unregister the lock with the local locking code before
14331 14331 * contacting the server. This avoids a potential race where
14332 14332 * another process gets notified that it has been granted a lock
14333 14333 * before we can unregister ourselves locally.
14334 14334 */
14335 14335 if ((cmd == F_SETLK || cmd == F_SETLKW) && flk->l_type == F_UNLCK) {
14336 14336 if (ctype == NFS4_LCK_CTYPE_NORM)
14337 14337 flk->l_pid = ttoproc(curthread)->p_pid;
14338 14338 nfs4_register_lock_locally(vp, flk, flag, offset);
14339 14339 }
14340 14340
14341 14341 /*
14342 14342 * Send the server the lock request. Continually loop with a delay
14343 14343 * if get error NFS4ERR_DENIED (for blocking locks) or NFS4ERR_GRACE.
14344 14344 */
14345 14345 resp = &res;
14346 14346
14347 14347 NFS4_DEBUG((nfs4_client_call_debug || nfs4_client_lock_debug),
14348 14348 (CE_NOTE,
14349 14349 "nfs4frlock: %s call, rp %s", needrecov ? "recov" : "first",
14350 14350 rnode4info(rp)));
14351 14351
14352 14352 if (lock_args && frc_no_reclaim) {
14353 14353 ASSERT(ctype == NFS4_LCK_CTYPE_RECLAIM);
14354 14354 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
14355 14355 "nfs4frlock: frc_no_reclaim: clearing reclaim"));
14356 14356 lock_args->reclaim = FALSE;
14357 14357 if (did_reclaimp)
14358 14358 *did_reclaimp = 0;
14359 14359 }
14360 14360
14361 14361 /*
14362 14362 * Do the OTW call.
14363 14363 */
14364 14364 rfs4call(VTOMI4(vp), argsp, resp, cred_otw, &doqueue, 0, ep);
14365 14365
14366 14366 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
14367 14367 "nfs4frlock: error %d, status %d", ep->error, resp->status));
14368 14368
14369 14369 needrecov = nfs4_needs_recovery(ep, TRUE, vp->v_vfsp);
14370 14370 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
14371 14371 "nfs4frlock: needrecov %d", needrecov));
14372 14372
14373 14373 if (ep->error == 0 && nfs4_need_to_bump_seqid(resp))
14374 14374 nfs4frlock_bump_seqid(lock_args, locku_args, oop, lop,
14375 14375 args.ctag);
14376 14376
14377 14377 /*
14378 14378 * Check if one of these mutually exclusive error cases has
14379 14379 * happened:
14380 14380 * need to swap credentials due to access error
14381 14381 * recovery is needed
14382 14382 * different error (only known case is missing Kerberos ticket)
14383 14383 */
14384 14384
14385 14385 if ((ep->error == EACCES ||
14386 14386 (ep->error == 0 && resp->status == NFS4ERR_ACCESS)) &&
14387 14387 cred_otw != cr) {
14388 14388 nfs4frlock_check_access(vp, op_hint, &recov_state, needrecov,
14389 14389 &did_start_fop, &argsp, &resp, ep->error, &lop, &oop, &osp,
14390 14390 cr, &cred_otw);
14391 14391 goto recov_retry;
14392 14392 }
14393 14393
14394 14394 if (needrecov) {
14395 14395 /*
14396 14396 * LOCKT requests don't need to recover from lost
14397 14397 * requests since they don't create/modify state.
14398 14398 */
14399 14399 if ((ep->error == EINTR ||
14400 14400 NFS4_FRC_UNMT_ERR(ep->error, vp->v_vfsp)) &&
14401 14401 lockt_args)
14402 14402 goto out;
14403 14403 /*
14404 14404 * Do not attempt recovery for requests initiated by
14405 14405 * the recovery framework. Let the framework redrive them.
14406 14406 */
14407 14407 if (ctype != NFS4_LCK_CTYPE_NORM)
14408 14408 goto out;
14409 14409 else {
14410 14410 ASSERT(resend_rqstp == NULL);
14411 14411 }
14412 14412
14413 14413 nfs4frlock_save_lost_rqst(ctype, ep->error,
14414 14414 flk_to_locktype(cmd, flk->l_type),
14415 14415 oop, osp, lop, flk, &lost_rqst, cred_otw, vp);
14416 14416
14417 14417 retry = nfs4frlock_recovery(needrecov, ep, &argsp,
14418 14418 &resp, lock_args, locku_args, &oop, &osp, &lop,
14419 14419 rp, vp, &recov_state, op_hint, &did_start_fop,
14420 14420 cmd != F_GETLK ? &lost_rqst : NULL, flk);
14421 14421
14422 14422 if (retry) {
14423 14423 ASSERT(oop == NULL);
14424 14424 ASSERT(osp == NULL);
14425 14425 ASSERT(lop == NULL);
14426 14426 goto recov_retry;
14427 14427 }
14428 14428 goto out;
14429 14429 }
14430 14430
14431 14431 /*
14432 14432 * Bail out if have reached this point with ep->error set. Can
14433 14433 * happen if (ep->error == EACCES && !needrecov && cred_otw == cr).
14434 14434 * This happens if Kerberos ticket has expired or has been
14435 14435 * destroyed.
14436 14436 */
14437 14437 if (ep->error != 0)
14438 14438 goto out;
14439 14439
14440 14440 /*
14441 14441 * Process the reply.
14442 14442 */
14443 14443 switch (resp->status) {
14444 14444 case NFS4_OK:
14445 14445 resop = &resp->array[1];
14446 14446 nfs4frlock_results_ok(ctype, cmd, flk, vp, flag, offset,
14447 14447 resend_rqstp);
14448 14448 /*
14449 14449 * Have a successful lock operation, now update state.
14450 14450 */
14451 14451 nfs4frlock_update_state(lock_args, locku_args, lockt_args,
14452 14452 resop, lop, vp, flk, cr, resend_rqstp);
14453 14453 break;
14454 14454
14455 14455 case NFS4ERR_DENIED:
14456 14456 resop = &resp->array[1];
14457 14457 retry = nfs4frlock_results_denied(ctype, lock_args, lockt_args,
14458 14458 &oop, &osp, &lop, cmd, vp, flk, op_hint,
14459 14459 &recov_state, needrecov, &argsp, &resp,
14460 14460 &tick_delay, &whence, &ep->error, resop, cr,
14461 14461 &did_start_fop, &skip_get_err);
14462 14462
14463 14463 if (retry) {
14464 14464 ASSERT(oop == NULL);
14465 14465 ASSERT(osp == NULL);
14466 14466 ASSERT(lop == NULL);
14467 14467 goto recov_retry;
14468 14468 }
14469 14469 break;
14470 14470 /*
14471 14471 * If the server won't let us reclaim, fall-back to trying to lock
14472 14472 * the file from scratch. Code elsewhere will check the changeinfo
14473 14473 * to ensure the file hasn't been changed.
14474 14474 */
14475 14475 case NFS4ERR_NO_GRACE:
14476 14476 if (lock_args && lock_args->reclaim == TRUE) {
14477 14477 ASSERT(ctype == NFS4_LCK_CTYPE_RECLAIM);
14478 14478 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
14479 14479 "nfs4frlock: reclaim: NFS4ERR_NO_GRACE"));
14480 14480 frc_no_reclaim = 1;
14481 14481 /* clean up before retrying */
14482 14482 needrecov = 0;
14483 14483 (void) nfs4frlock_recovery(needrecov, ep, &argsp, &resp,
14484 14484 lock_args, locku_args, &oop, &osp, &lop, rp, vp,
14485 14485 &recov_state, op_hint, &did_start_fop, NULL, flk);
14486 14486 goto recov_retry;
14487 14487 }
14488 14488 /* FALLTHROUGH */
14489 14489
14490 14490 default:
14491 14491 nfs4frlock_results_default(resp, &ep->error);
14492 14492 break;
14493 14493 }
14494 14494 out:
14495 14495 /*
14496 14496 * Process and cleanup from error. Make interrupted unlock
14497 14497 * requests look successful, since they will be handled by the
14498 14498 * client recovery code.
14499 14499 */
14500 14500 nfs4frlock_final_cleanup(ctype, argsp, resp, vp, op_hint, &recov_state,
14501 14501 needrecov, oop, osp, lop, flk, whence, offset, ls, &ep->error,
14502 14502 lock_args, locku_args, did_start_fop,
14503 14503 skip_get_err, cred_otw, cr);
14504 14504
14505 14505 if (ep->error == EINTR && flk->l_type == F_UNLCK &&
14506 14506 (cmd == F_SETLK || cmd == F_SETLKW))
14507 14507 ep->error = 0;
14508 14508 }
14509 14509
14510 14510 /*
14511 14511 * nfs4_safelock:
14512 14512 *
14513 14513 * Return non-zero if the given lock request can be handled without
14514 14514 * violating the constraints on concurrent mapping and locking.
14515 14515 */
14516 14516
14517 14517 static int
14518 14518 nfs4_safelock(vnode_t *vp, const struct flock64 *bfp, cred_t *cr)
14519 14519 {
14520 14520 rnode4_t *rp = VTOR4(vp);
14521 14521 struct vattr va;
14522 14522 int error;
14523 14523
14524 14524 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
14525 14525 ASSERT(rp->r_mapcnt >= 0);
14526 14526 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE, "nfs4_safelock %s: "
14527 14527 "(%"PRIx64", %"PRIx64"); mapcnt = %ld", bfp->l_type == F_WRLCK ?
14528 14528 "write" : bfp->l_type == F_RDLCK ? "read" : "unlock",
14529 14529 bfp->l_start, bfp->l_len, rp->r_mapcnt));
14530 14530
14531 14531 if (rp->r_mapcnt == 0)
14532 14532 return (1); /* always safe if not mapped */
14533 14533
14534 14534 /*
14535 14535 * If the file is already mapped and there are locks, then they
14536 14536 * should be all safe locks. So adding or removing a lock is safe
14537 14537 * as long as the new request is safe (i.e., whole-file, meaning
14538 14538 * length and starting offset are both zero).
14539 14539 */
14540 14540
14541 14541 if (bfp->l_start != 0 || bfp->l_len != 0) {
14542 14542 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE, "nfs4_safelock: "
14543 14543 "cannot lock a memory mapped file unless locking the "
14544 14544 "entire file: start %"PRIx64", len %"PRIx64,
14545 14545 bfp->l_start, bfp->l_len));
14546 14546 return (0);
14547 14547 }
14548 14548
14549 14549 /* mandatory locking and mapping don't mix */
14550 14550 va.va_mask = AT_MODE;
14551 14551 error = VOP_GETATTR(vp, &va, 0, cr, NULL);
14552 14552 if (error != 0) {
14553 14553 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE, "nfs4_safelock: "
14554 14554 "getattr error %d", error));
14555 14555 return (0); /* treat errors conservatively */
14556 14556 }
14557 14557 if (MANDLOCK(vp, va.va_mode)) {
14558 14558 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE, "nfs4_safelock: "
14559 14559 "cannot mandatory lock and mmap a file"));
14560 14560 return (0);
14561 14561 }
14562 14562
14563 14563 return (1);
14564 14564 }
14565 14565
14566 14566
14567 14567 /*
14568 14568 * Register the lock locally within Solaris.
14569 14569 * As the client, we "or" the sysid with LM_SYSID_CLIENT when
14570 14570 * recording locks locally.
14571 14571 *
14572 14572 * This should handle conflicts/cooperation with NFS v2/v3 since all locks
14573 14573 * are registered locally.
14574 14574 */
14575 14575 void
14576 14576 nfs4_register_lock_locally(vnode_t *vp, struct flock64 *flk, int flag,
14577 14577 u_offset_t offset)
14578 14578 {
14579 14579 int oldsysid;
14580 14580 int error;
14581 14581 #ifdef DEBUG
14582 14582 char *name;
14583 14583 #endif
14584 14584
14585 14585 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
14586 14586
14587 14587 #ifdef DEBUG
14588 14588 name = fn_name(VTOSV(vp)->sv_name);
14589 14589 NFS4_DEBUG(nfs4_client_lock_debug,
14590 14590 (CE_NOTE, "nfs4_register_lock_locally: %s: type %d, "
14591 14591 "start %"PRIx64", length %"PRIx64", pid %ld, sysid %d",
14592 14592 name, flk->l_type, flk->l_start, flk->l_len, (long)flk->l_pid,
14593 14593 flk->l_sysid));
14594 14594 kmem_free(name, MAXNAMELEN);
14595 14595 #endif
14596 14596
14597 14597 /* register the lock with local locking */
14598 14598 oldsysid = flk->l_sysid;
14599 14599 flk->l_sysid |= LM_SYSID_CLIENT;
14600 14600 error = reclock(vp, flk, SETFLCK, flag, offset, NULL);
14601 14601 #ifdef DEBUG
14602 14602 if (error != 0) {
14603 14603 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
14604 14604 "nfs4_register_lock_locally: could not register with"
14605 14605 " local locking"));
14606 14606 NFS4_DEBUG(nfs4_client_lock_debug, (CE_CONT,
14607 14607 "error %d, vp 0x%p, pid %d, sysid 0x%x",
14608 14608 error, (void *)vp, flk->l_pid, flk->l_sysid));
14609 14609 NFS4_DEBUG(nfs4_client_lock_debug, (CE_CONT,
14610 14610 "type %d off 0x%" PRIx64 " len 0x%" PRIx64,
14611 14611 flk->l_type, flk->l_start, flk->l_len));
14612 14612 (void) reclock(vp, flk, 0, flag, offset, NULL);
14613 14613 NFS4_DEBUG(nfs4_client_lock_debug, (CE_CONT,
14614 14614 "blocked by pid %d sysid 0x%x type %d "
14615 14615 "off 0x%" PRIx64 " len 0x%" PRIx64,
14616 14616 flk->l_pid, flk->l_sysid, flk->l_type, flk->l_start,
14617 14617 flk->l_len));
14618 14618 }
14619 14619 #endif
14620 14620 flk->l_sysid = oldsysid;
14621 14621 }
14622 14622
14623 14623 /*
14624 14624 * nfs4_lockrelease:
14625 14625 *
14626 14626 * Release any locks on the given vnode that are held by the current
14627 14627 * process. Also removes the lock owner (if one exists) from the rnode's
14628 14628 * list.
14629 14629 */
14630 14630 static int
14631 14631 nfs4_lockrelease(vnode_t *vp, int flag, offset_t offset, cred_t *cr)
14632 14632 {
14633 14633 flock64_t ld;
14634 14634 int ret, error;
14635 14635 rnode4_t *rp;
14636 14636 nfs4_lock_owner_t *lop;
14637 14637 nfs4_recov_state_t recov_state;
14638 14638 mntinfo4_t *mi;
14639 14639 bool_t possible_orphan = FALSE;
14640 14640 bool_t recovonly;
14641 14641
14642 14642 ASSERT((uintptr_t)vp > KERNELBASE);
14643 14643 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
14644 14644
14645 14645 rp = VTOR4(vp);
14646 14646 mi = VTOMI4(vp);
14647 14647
14648 14648 /*
14649 14649 * If we have not locked anything then we can
14650 14650 * just return since we have no work to do.
14651 14651 */
14652 14652 if (rp->r_lo_head.lo_next_rnode == &rp->r_lo_head) {
14653 14653 return (0);
14654 14654 }
14655 14655
14656 14656 /*
14657 14657 * We need to comprehend that another thread may
14658 14658 * kick off recovery and the lock_owner we have stashed
14659 14659 * in lop might be invalid so we should NOT cache it
14660 14660 * locally!
14661 14661 */
14662 14662 recov_state.rs_flags = 0;
14663 14663 recov_state.rs_num_retry_despite_err = 0;
14664 14664 error = nfs4_start_fop(mi, vp, NULL, OH_LOCKU, &recov_state,
14665 14665 &recovonly);
14666 14666 if (error) {
14667 14667 mutex_enter(&rp->r_statelock);
14668 14668 rp->r_flags |= R4LODANGLERS;
14669 14669 mutex_exit(&rp->r_statelock);
14670 14670 return (error);
14671 14671 }
14672 14672
14673 14673 lop = find_lock_owner(rp, curproc->p_pid, LOWN_ANY);
14674 14674
14675 14675 /*
14676 14676 * Check if the lock owner might have a lock (request was sent but
14677 14677 * no response was received). Also check if there are any remote
14678 14678 * locks on the file. (In theory we shouldn't have to make this
14679 14679 * second check if there's no lock owner, but for now we'll be
14680 14680 * conservative and do it anyway.) If either condition is true,
14681 14681 * send an unlock for the entire file to the server.
14682 14682 *
14683 14683 * Note that no explicit synchronization is needed here. At worst,
14684 14684 * flk_has_remote_locks() will return a false positive, in which case
14685 14685 * the unlock call wastes time but doesn't harm correctness.
14686 14686 */
14687 14687
14688 14688 if (lop) {
14689 14689 mutex_enter(&lop->lo_lock);
14690 14690 possible_orphan = lop->lo_pending_rqsts;
14691 14691 mutex_exit(&lop->lo_lock);
14692 14692 lock_owner_rele(lop);
14693 14693 }
14694 14694
14695 14695 nfs4_end_fop(mi, vp, NULL, OH_LOCKU, &recov_state, 0);
14696 14696
14697 14697 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
14698 14698 "nfs4_lockrelease: possible orphan %d, remote locks %d, for "
14699 14699 "lop %p.", possible_orphan, flk_has_remote_locks(vp),
14700 14700 (void *)lop));
14701 14701
14702 14702 if (possible_orphan || flk_has_remote_locks(vp)) {
14703 14703 ld.l_type = F_UNLCK; /* set to unlock entire file */
14704 14704 ld.l_whence = 0; /* unlock from start of file */
14705 14705 ld.l_start = 0;
14706 14706 ld.l_len = 0; /* do entire file */
14707 14707
14708 14708 ret = VOP_FRLOCK(vp, F_SETLK, &ld, flag, offset, NULL,
14709 14709 cr, NULL);
14710 14710
14711 14711 if (ret != 0) {
14712 14712 /*
14713 14713 * If VOP_FRLOCK fails, make sure we unregister
14714 14714 * local locks before we continue.
14715 14715 */
14716 14716 ld.l_pid = ttoproc(curthread)->p_pid;
14717 14717 nfs4_register_lock_locally(vp, &ld, flag, offset);
14718 14718 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
14719 14719 "nfs4_lockrelease: lock release error on vp"
14720 14720 " %p: error %d.\n", (void *)vp, ret));
14721 14721 }
14722 14722 }
14723 14723
14724 14724 recov_state.rs_flags = 0;
14725 14725 recov_state.rs_num_retry_despite_err = 0;
14726 14726 error = nfs4_start_fop(mi, vp, NULL, OH_LOCKU, &recov_state,
14727 14727 &recovonly);
14728 14728 if (error) {
14729 14729 mutex_enter(&rp->r_statelock);
14730 14730 rp->r_flags |= R4LODANGLERS;
14731 14731 mutex_exit(&rp->r_statelock);
14732 14732 return (error);
14733 14733 }
14734 14734
14735 14735 /*
14736 14736 * So, here we're going to need to retrieve the lock-owner
14737 14737 * again (in case recovery has done a switch-a-roo) and
14738 14738 * remove it because we can.
14739 14739 */
14740 14740 lop = find_lock_owner(rp, curproc->p_pid, LOWN_ANY);
14741 14741
14742 14742 if (lop) {
14743 14743 nfs4_rnode_remove_lock_owner(rp, lop);
14744 14744 lock_owner_rele(lop);
14745 14745 }
14746 14746
14747 14747 nfs4_end_fop(mi, vp, NULL, OH_LOCKU, &recov_state, 0);
14748 14748 return (0);
14749 14749 }
14750 14750
14751 14751 /*
14752 14752 * Wait for 'tick_delay' clock ticks.
14753 14753 * Implement exponential backoff until hit the lease_time of this nfs4_server.
14754 14754 * NOTE: lock_lease_time is in seconds.
14755 14755 *
14756 14756 * XXX For future improvements, should implement a waiting queue scheme.
14757 14757 */
14758 14758 static int
14759 14759 nfs4_block_and_wait(clock_t *tick_delay, rnode4_t *rp)
14760 14760 {
14761 14761 long milliseconds_delay;
14762 14762 time_t lock_lease_time;
14763 14763
14764 14764 /* wait tick_delay clock ticks or siginteruptus */
14765 14765 if (delay_sig(*tick_delay)) {
14766 14766 return (EINTR);
14767 14767 }
14768 14768 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE, "nfs4_block_and_wait: "
14769 14769 "reissue the lock request: blocked for %ld clock ticks: %ld "
14770 14770 "milliseconds", *tick_delay, drv_hztousec(*tick_delay) / 1000));
14771 14771
14772 14772 /* get the lease time */
14773 14773 lock_lease_time = r2lease_time(rp);
14774 14774
14775 14775 /* drv_hztousec converts ticks to microseconds */
14776 14776 milliseconds_delay = drv_hztousec(*tick_delay) / 1000;
14777 14777 if (milliseconds_delay < lock_lease_time * 1000) {
14778 14778 *tick_delay = 2 * *tick_delay;
14779 14779 if (drv_hztousec(*tick_delay) > lock_lease_time * 1000 * 1000)
14780 14780 *tick_delay = drv_usectohz(lock_lease_time*1000*1000);
14781 14781 }
14782 14782 return (0);
14783 14783 }
14784 14784
14785 14785
14786 14786 void
14787 14787 nfs4_vnops_init(void)
14788 14788 {
14789 14789 }
14790 14790
14791 14791 void
14792 14792 nfs4_vnops_fini(void)
14793 14793 {
14794 14794 }
14795 14795
14796 14796 /*
14797 14797 * Return a reference to the directory (parent) vnode for a given vnode,
14798 14798 * using the saved pathname information and the directory file handle. The
14799 14799 * caller is responsible for disposing of the reference.
14800 14800 * Returns zero or an errno value.
14801 14801 *
14802 14802 * Caller should set need_start_op to FALSE if it is the recovery
14803 14803 * thread, or if a start_fop has already been done. Otherwise, TRUE.
14804 14804 */
14805 14805 int
14806 14806 vtodv(vnode_t *vp, vnode_t **dvpp, cred_t *cr, bool_t need_start_op)
14807 14807 {
14808 14808 svnode_t *svnp;
14809 14809 vnode_t *dvp = NULL;
14810 14810 servinfo4_t *svp;
14811 14811 nfs4_fname_t *mfname;
14812 14812 int error;
14813 14813
14814 14814 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
14815 14815
14816 14816 if (vp->v_flag & VROOT) {
14817 14817 nfs4_sharedfh_t *sfh;
14818 14818 nfs_fh4 fh;
14819 14819 mntinfo4_t *mi;
14820 14820
14821 14821 ASSERT(vp->v_type == VREG);
14822 14822
14823 14823 mi = VTOMI4(vp);
14824 14824 svp = mi->mi_curr_serv;
14825 14825 (void) nfs_rw_enter_sig(&svp->sv_lock, RW_READER, 0);
14826 14826 fh.nfs_fh4_len = svp->sv_pfhandle.fh_len;
14827 14827 fh.nfs_fh4_val = svp->sv_pfhandle.fh_buf;
14828 14828 sfh = sfh4_get(&fh, VTOMI4(vp));
14829 14829 nfs_rw_exit(&svp->sv_lock);
14830 14830 mfname = mi->mi_fname;
14831 14831 fn_hold(mfname);
14832 14832 dvp = makenfs4node_by_fh(sfh, NULL, &mfname, NULL, mi, cr, 0);
14833 14833 sfh4_rele(&sfh);
14834 14834
14835 14835 if (dvp->v_type == VNON)
14836 14836 dvp->v_type = VDIR;
14837 14837 *dvpp = dvp;
14838 14838 return (0);
14839 14839 }
14840 14840
14841 14841 svnp = VTOSV(vp);
14842 14842
14843 14843 if (svnp == NULL) {
14844 14844 NFS4_DEBUG(nfs4_client_shadow_debug, (CE_NOTE, "vtodv: "
14845 14845 "shadow node is NULL"));
14846 14846 return (EINVAL);
14847 14847 }
14848 14848
14849 14849 if (svnp->sv_name == NULL || svnp->sv_dfh == NULL) {
14850 14850 NFS4_DEBUG(nfs4_client_shadow_debug, (CE_NOTE, "vtodv: "
14851 14851 "shadow node name or dfh val == NULL"));
14852 14852 return (EINVAL);
14853 14853 }
14854 14854
14855 14855 error = nfs4_make_dotdot(svnp->sv_dfh, 0, vp, cr, &dvp,
14856 14856 (int)need_start_op);
14857 14857 if (error != 0) {
14858 14858 NFS4_DEBUG(nfs4_client_shadow_debug, (CE_NOTE, "vtodv: "
14859 14859 "nfs4_make_dotdot returned %d", error));
14860 14860 return (error);
14861 14861 }
14862 14862 if (!dvp) {
14863 14863 NFS4_DEBUG(nfs4_client_shadow_debug, (CE_NOTE, "vtodv: "
14864 14864 "nfs4_make_dotdot returned a NULL dvp"));
14865 14865 return (EIO);
14866 14866 }
14867 14867 if (dvp->v_type == VNON)
14868 14868 dvp->v_type = VDIR;
14869 14869 ASSERT(dvp->v_type == VDIR);
14870 14870 if (VTOR4(vp)->r_flags & R4ISXATTR) {
14871 14871 mutex_enter(&dvp->v_lock);
14872 14872 dvp->v_flag |= V_XATTRDIR;
14873 14873 mutex_exit(&dvp->v_lock);
14874 14874 }
14875 14875 *dvpp = dvp;
14876 14876 return (0);
14877 14877 }
14878 14878
14879 14879 /*
14880 14880 * Copy the (final) component name of vp to fnamep. maxlen is the maximum
14881 14881 * length that fnamep can accept, including the trailing null.
14882 14882 * Returns 0 if okay, returns an errno value if there was a problem.
14883 14883 */
14884 14884
14885 14885 int
14886 14886 vtoname(vnode_t *vp, char *fnamep, ssize_t maxlen)
14887 14887 {
14888 14888 char *fn;
14889 14889 int err = 0;
14890 14890 servinfo4_t *svp;
14891 14891 svnode_t *shvp;
14892 14892
14893 14893 /*
14894 14894 * If the file being opened has VROOT set, then this is
14895 14895 * a "file" mount. sv_name will not be interesting, so
14896 14896 * go back to the servinfo4 to get the original mount
14897 14897 * path and strip off all but the final edge. Otherwise
14898 14898 * just return the name from the shadow vnode.
14899 14899 */
14900 14900
14901 14901 if (vp->v_flag & VROOT) {
14902 14902
14903 14903 svp = VTOMI4(vp)->mi_curr_serv;
14904 14904 (void) nfs_rw_enter_sig(&svp->sv_lock, RW_READER, 0);
14905 14905
14906 14906 fn = strrchr(svp->sv_path, '/');
14907 14907 if (fn == NULL)
14908 14908 err = EINVAL;
14909 14909 else
14910 14910 fn++;
14911 14911 } else {
14912 14912 shvp = VTOSV(vp);
14913 14913 fn = fn_name(shvp->sv_name);
14914 14914 }
14915 14915
14916 14916 if (err == 0)
14917 14917 if (strlen(fn) < maxlen)
14918 14918 (void) strcpy(fnamep, fn);
14919 14919 else
14920 14920 err = ENAMETOOLONG;
14921 14921
14922 14922 if (vp->v_flag & VROOT)
14923 14923 nfs_rw_exit(&svp->sv_lock);
14924 14924 else
14925 14925 kmem_free(fn, MAXNAMELEN);
14926 14926
14927 14927 return (err);
14928 14928 }
14929 14929
14930 14930 /*
14931 14931 * Bookkeeping for a close that doesn't need to go over the wire.
14932 14932 * *have_lockp is set to 0 if 'os_sync_lock' is released; otherwise
14933 14933 * it is left at 1.
14934 14934 */
14935 14935 void
14936 14936 nfs4close_notw(vnode_t *vp, nfs4_open_stream_t *osp, int *have_lockp)
14937 14937 {
14938 14938 rnode4_t *rp;
14939 14939 mntinfo4_t *mi;
14940 14940
14941 14941 mi = VTOMI4(vp);
14942 14942 rp = VTOR4(vp);
14943 14943
14944 14944 NFS4_DEBUG(nfs4close_notw_debug, (CE_NOTE, "nfs4close_notw: "
14945 14945 "rp=%p osp=%p", (void *)rp, (void *)osp));
14946 14946 ASSERT(nfs_zone() == mi->mi_zone);
14947 14947 ASSERT(mutex_owned(&osp->os_sync_lock));
14948 14948 ASSERT(*have_lockp);
14949 14949
14950 14950 if (!osp->os_valid ||
14951 14951 osp->os_open_ref_count > 0 || osp->os_mapcnt > 0) {
14952 14952 return;
14953 14953 }
14954 14954
14955 14955 /*
14956 14956 * This removes the reference obtained at OPEN; ie,
14957 14957 * when the open stream structure was created.
14958 14958 *
14959 14959 * We don't have to worry about calling 'open_stream_rele'
14960 14960 * since we our currently holding a reference to this
14961 14961 * open stream which means the count can not go to 0 with
14962 14962 * this decrement.
14963 14963 */
14964 14964 ASSERT(osp->os_ref_count >= 2);
14965 14965 osp->os_ref_count--;
14966 14966 osp->os_valid = 0;
14967 14967 mutex_exit(&osp->os_sync_lock);
14968 14968 *have_lockp = 0;
14969 14969
14970 14970 nfs4_dec_state_ref_count(mi);
14971 14971 }
14972 14972
14973 14973 /*
14974 14974 * Close all remaining open streams on the rnode. These open streams
14975 14975 * could be here because:
14976 14976 * - The close attempted at either close or delmap failed
14977 14977 * - Some kernel entity did VOP_OPEN but never did VOP_CLOSE
14978 14978 * - Someone did mknod on a regular file but never opened it
14979 14979 */
14980 14980 int
14981 14981 nfs4close_all(vnode_t *vp, cred_t *cr)
14982 14982 {
14983 14983 nfs4_open_stream_t *osp;
14984 14984 int error;
14985 14985 nfs4_error_t e = { 0, NFS4_OK, RPC_SUCCESS };
14986 14986 rnode4_t *rp;
14987 14987
14988 14988 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
14989 14989
14990 14990 error = 0;
14991 14991 rp = VTOR4(vp);
14992 14992
14993 14993 /*
14994 14994 * At this point, all we know is that the last time
14995 14995 * someone called vn_rele, the count was 1. Since then,
14996 14996 * the vnode could have been re-activated. We want to
14997 14997 * loop through the open streams and close each one, but
14998 14998 * we have to be careful since once we release the rnode
14999 14999 * hash bucket lock, someone else is free to come in and
15000 15000 * re-activate the rnode and add new open streams. The
15001 15001 * strategy is take the rnode hash bucket lock, verify that
15002 15002 * the count is still 1, grab the open stream off the
15003 15003 * head of the list and mark it invalid, then release the
15004 15004 * rnode hash bucket lock and proceed with that open stream.
15005 15005 * This is ok because nfs4close_one() will acquire the proper
15006 15006 * open/create to close/destroy synchronization for open
15007 15007 * streams, and will ensure that if someone has reopened
15008 15008 * the open stream after we've dropped the hash bucket lock
15009 15009 * then we'll just simply return without destroying the
15010 15010 * open stream.
15011 15011 * Repeat until the list is empty.
15012 15012 */
15013 15013
15014 15014 for (;;) {
15015 15015
15016 15016 /* make sure vnode hasn't been reactivated */
15017 15017 rw_enter(&rp->r_hashq->r_lock, RW_READER);
15018 15018 mutex_enter(&vp->v_lock);
15019 15019 if (vp->v_count > 1) {
15020 15020 mutex_exit(&vp->v_lock);
15021 15021 rw_exit(&rp->r_hashq->r_lock);
15022 15022 break;
15023 15023 }
15024 15024 /*
15025 15025 * Grabbing r_os_lock before releasing v_lock prevents
15026 15026 * a window where the rnode/open stream could get
15027 15027 * reactivated (and os_force_close set to 0) before we
15028 15028 * had a chance to set os_force_close to 1.
15029 15029 */
15030 15030 mutex_enter(&rp->r_os_lock);
15031 15031 mutex_exit(&vp->v_lock);
15032 15032
15033 15033 osp = list_head(&rp->r_open_streams);
15034 15034 if (!osp) {
15035 15035 /* nothing left to CLOSE OTW, so return */
15036 15036 mutex_exit(&rp->r_os_lock);
15037 15037 rw_exit(&rp->r_hashq->r_lock);
15038 15038 break;
15039 15039 }
15040 15040
15041 15041 mutex_enter(&rp->r_statev4_lock);
15042 15042 /* the file can't still be mem mapped */
15043 15043 ASSERT(rp->r_mapcnt == 0);
15044 15044 if (rp->created_v4)
15045 15045 rp->created_v4 = 0;
15046 15046 mutex_exit(&rp->r_statev4_lock);
15047 15047
15048 15048 /*
15049 15049 * Grab a ref on this open stream; nfs4close_one
15050 15050 * will mark it as invalid
15051 15051 */
15052 15052 mutex_enter(&osp->os_sync_lock);
15053 15053 osp->os_ref_count++;
15054 15054 osp->os_force_close = 1;
15055 15055 mutex_exit(&osp->os_sync_lock);
15056 15056 mutex_exit(&rp->r_os_lock);
15057 15057 rw_exit(&rp->r_hashq->r_lock);
15058 15058
15059 15059 nfs4close_one(vp, osp, cr, 0, NULL, &e, CLOSE_FORCE, 0, 0, 0);
15060 15060
15061 15061 /* Update error if it isn't already non-zero */
15062 15062 if (error == 0) {
15063 15063 if (e.error)
15064 15064 error = e.error;
15065 15065 else if (e.stat)
15066 15066 error = geterrno4(e.stat);
15067 15067 }
15068 15068
15069 15069 #ifdef DEBUG
15070 15070 nfs4close_all_cnt++;
15071 15071 #endif
15072 15072 /* Release the ref on osp acquired above. */
15073 15073 open_stream_rele(osp, rp);
15074 15074
15075 15075 /* Proceed to the next open stream, if any */
15076 15076 }
15077 15077 return (error);
15078 15078 }
15079 15079
15080 15080 /*
15081 15081 * nfs4close_one - close one open stream for a file if needed.
15082 15082 *
15083 15083 * "close_type" indicates which close path this is:
15084 15084 * CLOSE_NORM: close initiated via VOP_CLOSE.
15085 15085 * CLOSE_DELMAP: close initiated via VOP_DELMAP.
15086 15086 * CLOSE_FORCE: close initiated via VOP_INACTIVE. This path forces
15087 15087 * the close and release of client state for this open stream
15088 15088 * (unless someone else has the open stream open).
15089 15089 * CLOSE_RESEND: indicates the request is a replay of an earlier request
15090 15090 * (e.g., due to abort because of a signal).
15091 15091 * CLOSE_AFTER_RESEND: close initiated to "undo" a successful resent OPEN.
15092 15092 *
15093 15093 * CLOSE_RESEND and CLOSE_AFTER_RESEND will not attempt to retry after client
15094 15094 * recovery. Instead, the caller is expected to deal with retries.
15095 15095 *
15096 15096 * The caller can either pass in the osp ('provided_osp') or not.
15097 15097 *
15098 15098 * 'access_bits' represents the access we are closing/downgrading.
15099 15099 *
15100 15100 * 'len', 'prot', and 'mmap_flags' are used for CLOSE_DELMAP. 'len' is the
15101 15101 * number of bytes we are unmapping, 'maxprot' is the mmap protection, and
15102 15102 * 'mmap_flags' tells us the type of sharing (MAP_PRIVATE or MAP_SHARED).
15103 15103 *
15104 15104 * Errors are returned via the nfs4_error_t.
15105 15105 */
15106 15106 void
15107 15107 nfs4close_one(vnode_t *vp, nfs4_open_stream_t *provided_osp, cred_t *cr,
15108 15108 int access_bits, nfs4_lost_rqst_t *lrp, nfs4_error_t *ep,
15109 15109 nfs4_close_type_t close_type, size_t len, uint_t maxprot,
15110 15110 uint_t mmap_flags)
15111 15111 {
15112 15112 nfs4_open_owner_t *oop;
15113 15113 nfs4_open_stream_t *osp = NULL;
15114 15114 int retry = 0;
15115 15115 int num_retries = NFS4_NUM_RECOV_RETRIES;
15116 15116 rnode4_t *rp;
15117 15117 mntinfo4_t *mi;
15118 15118 nfs4_recov_state_t recov_state;
15119 15119 cred_t *cred_otw = NULL;
15120 15120 bool_t recovonly = FALSE;
15121 15121 int isrecov;
15122 15122 int force_close;
15123 15123 int close_failed = 0;
15124 15124 int did_dec_count = 0;
15125 15125 int did_start_op = 0;
15126 15126 int did_force_recovlock = 0;
15127 15127 int did_start_seqid_sync = 0;
15128 15128 int have_sync_lock = 0;
15129 15129
15130 15130 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
15131 15131
15132 15132 NFS4_DEBUG(nfs4close_one_debug, (CE_NOTE, "closing vp %p osp %p, "
15133 15133 "lrp %p, close type %d len %ld prot %x mmap flags %x bits %x",
15134 15134 (void *)vp, (void *)provided_osp, (void *)lrp, close_type,
15135 15135 len, maxprot, mmap_flags, access_bits));
15136 15136
15137 15137 nfs4_error_zinit(ep);
15138 15138 rp = VTOR4(vp);
15139 15139 mi = VTOMI4(vp);
15140 15140 isrecov = (close_type == CLOSE_RESEND ||
15141 15141 close_type == CLOSE_AFTER_RESEND);
15142 15142
15143 15143 /*
15144 15144 * First get the open owner.
15145 15145 */
15146 15146 if (!provided_osp) {
15147 15147 oop = find_open_owner(cr, NFS4_PERM_CREATED, mi);
15148 15148 } else {
15149 15149 oop = provided_osp->os_open_owner;
15150 15150 ASSERT(oop != NULL);
15151 15151 open_owner_hold(oop);
15152 15152 }
15153 15153
15154 15154 if (!oop) {
15155 15155 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
15156 15156 "nfs4close_one: no oop, rp %p, mi %p, cr %p, osp %p, "
15157 15157 "close type %d", (void *)rp, (void *)mi, (void *)cr,
15158 15158 (void *)provided_osp, close_type));
15159 15159 ep->error = EIO;
15160 15160 goto out;
15161 15161 }
15162 15162
15163 15163 cred_otw = nfs4_get_otw_cred(cr, mi, oop);
15164 15164 recov_retry:
15165 15165 osp = NULL;
15166 15166 close_failed = 0;
15167 15167 force_close = (close_type == CLOSE_FORCE);
15168 15168 retry = 0;
15169 15169 did_start_op = 0;
15170 15170 did_force_recovlock = 0;
15171 15171 did_start_seqid_sync = 0;
15172 15172 have_sync_lock = 0;
15173 15173 recovonly = FALSE;
15174 15174 recov_state.rs_flags = 0;
15175 15175 recov_state.rs_num_retry_despite_err = 0;
15176 15176
15177 15177 /*
15178 15178 * Second synchronize with recovery.
15179 15179 */
15180 15180 if (!isrecov) {
15181 15181 ep->error = nfs4_start_fop(mi, vp, NULL, OH_CLOSE,
15182 15182 &recov_state, &recovonly);
15183 15183 if (!ep->error) {
15184 15184 did_start_op = 1;
15185 15185 } else {
15186 15186 close_failed = 1;
15187 15187 /*
15188 15188 * If we couldn't get start_fop, but have to
15189 15189 * cleanup state, then at least acquire the
15190 15190 * mi_recovlock so we can synchronize with
15191 15191 * recovery.
15192 15192 */
15193 15193 if (close_type == CLOSE_FORCE) {
15194 15194 (void) nfs_rw_enter_sig(&mi->mi_recovlock,
15195 15195 RW_READER, FALSE);
15196 15196 did_force_recovlock = 1;
15197 15197 } else
15198 15198 goto out;
15199 15199 }
15200 15200 }
15201 15201
15202 15202 /*
15203 15203 * We cannot attempt to get the open seqid sync if nfs4_start_fop
15204 15204 * set 'recovonly' to TRUE since most likely this is due to
15205 15205 * reovery being active (MI4_RECOV_ACTIV). If recovery is active,
15206 15206 * nfs4_start_open_seqid_sync() will fail with EAGAIN asking us
15207 15207 * to retry, causing us to loop until recovery finishes. Plus we
15208 15208 * don't need protection over the open seqid since we're not going
15209 15209 * OTW, hence don't need to use the seqid.
15210 15210 */
15211 15211 if (recovonly == FALSE) {
15212 15212 /* need to grab the open owner sync before 'os_sync_lock' */
15213 15213 ep->error = nfs4_start_open_seqid_sync(oop, mi);
15214 15214 if (ep->error == EAGAIN) {
15215 15215 ASSERT(!isrecov);
15216 15216 if (did_start_op)
15217 15217 nfs4_end_fop(mi, vp, NULL, OH_CLOSE,
15218 15218 &recov_state, TRUE);
15219 15219 if (did_force_recovlock)
15220 15220 nfs_rw_exit(&mi->mi_recovlock);
15221 15221 goto recov_retry;
15222 15222 }
15223 15223 did_start_seqid_sync = 1;
15224 15224 }
15225 15225
15226 15226 /*
15227 15227 * Third get an open stream and acquire 'os_sync_lock' to
15228 15228 * sychronize the opening/creating of an open stream with the
15229 15229 * closing/destroying of an open stream.
15230 15230 */
15231 15231 if (!provided_osp) {
15232 15232 /* returns with 'os_sync_lock' held */
15233 15233 osp = find_open_stream(oop, rp);
15234 15234 if (!osp) {
15235 15235 ep->error = EIO;
15236 15236 goto out;
15237 15237 }
15238 15238 } else {
15239 15239 osp = provided_osp;
15240 15240 open_stream_hold(osp);
15241 15241 mutex_enter(&osp->os_sync_lock);
15242 15242 }
15243 15243 have_sync_lock = 1;
15244 15244
15245 15245 ASSERT(oop == osp->os_open_owner);
15246 15246
15247 15247 /*
15248 15248 * Fourth, do any special pre-OTW CLOSE processing
15249 15249 * based on the specific close type.
15250 15250 */
15251 15251 if ((close_type == CLOSE_NORM || close_type == CLOSE_AFTER_RESEND) &&
15252 15252 !did_dec_count) {
15253 15253 ASSERT(osp->os_open_ref_count > 0);
15254 15254 osp->os_open_ref_count--;
15255 15255 did_dec_count = 1;
15256 15256 if (osp->os_open_ref_count == 0)
15257 15257 osp->os_final_close = 1;
15258 15258 }
15259 15259
15260 15260 if (close_type == CLOSE_FORCE) {
15261 15261 /* see if somebody reopened the open stream. */
15262 15262 if (!osp->os_force_close) {
15263 15263 NFS4_DEBUG(nfs4close_one_debug, (CE_NOTE,
15264 15264 "nfs4close_one: skip CLOSE_FORCE as osp %p "
15265 15265 "was reopened, vp %p", (void *)osp, (void *)vp));
15266 15266 ep->error = 0;
15267 15267 ep->stat = NFS4_OK;
15268 15268 goto out;
15269 15269 }
15270 15270
15271 15271 if (!osp->os_final_close && !did_dec_count) {
15272 15272 osp->os_open_ref_count--;
15273 15273 did_dec_count = 1;
15274 15274 }
15275 15275
15276 15276 /*
15277 15277 * We can't depend on os_open_ref_count being 0 due to the
15278 15278 * way executables are opened (VN_RELE to match a VOP_OPEN).
15279 15279 */
15280 15280 #ifdef NOTYET
15281 15281 ASSERT(osp->os_open_ref_count == 0);
15282 15282 #endif
15283 15283 if (osp->os_open_ref_count != 0) {
15284 15284 NFS4_DEBUG(nfs4close_one_debug, (CE_NOTE,
15285 15285 "nfs4close_one: should panic here on an "
15286 15286 "ASSERT(osp->os_open_ref_count == 0). Ignoring "
15287 15287 "since this is probably the exec problem."));
15288 15288
15289 15289 osp->os_open_ref_count = 0;
15290 15290 }
15291 15291
15292 15292 /*
15293 15293 * There is the possibility that nfs4close_one()
15294 15294 * for close_type == CLOSE_DELMAP couldn't find the
15295 15295 * open stream, thus couldn't decrement its os_mapcnt;
15296 15296 * therefore we can't use this ASSERT yet.
15297 15297 */
15298 15298 #ifdef NOTYET
15299 15299 ASSERT(osp->os_mapcnt == 0);
15300 15300 #endif
15301 15301 osp->os_mapcnt = 0;
15302 15302 }
15303 15303
15304 15304 if (close_type == CLOSE_DELMAP && !did_dec_count) {
15305 15305 ASSERT(osp->os_mapcnt >= btopr(len));
15306 15306
15307 15307 if ((mmap_flags & MAP_SHARED) && (maxprot & PROT_WRITE))
15308 15308 osp->os_mmap_write -= btopr(len);
15309 15309 if (maxprot & PROT_READ)
15310 15310 osp->os_mmap_read -= btopr(len);
15311 15311 if (maxprot & PROT_EXEC)
15312 15312 osp->os_mmap_read -= btopr(len);
15313 15313 /* mirror the PROT_NONE check in nfs4_addmap() */
15314 15314 if (!(maxprot & PROT_READ) && !(maxprot & PROT_WRITE) &&
15315 15315 !(maxprot & PROT_EXEC))
15316 15316 osp->os_mmap_read -= btopr(len);
15317 15317 osp->os_mapcnt -= btopr(len);
15318 15318 did_dec_count = 1;
15319 15319 }
15320 15320
15321 15321 if (recovonly) {
15322 15322 nfs4_lost_rqst_t lost_rqst;
15323 15323
15324 15324 /* request should not already be in recovery queue */
15325 15325 ASSERT(lrp == NULL);
15326 15326 nfs4_error_init(ep, EINTR);
15327 15327 nfs4close_save_lost_rqst(ep->error, &lost_rqst, oop,
15328 15328 osp, cred_otw, vp);
15329 15329 mutex_exit(&osp->os_sync_lock);
15330 15330 have_sync_lock = 0;
15331 15331 (void) nfs4_start_recovery(ep, mi, vp, NULL, NULL,
15332 15332 lost_rqst.lr_op == OP_CLOSE ?
15333 15333 &lost_rqst : NULL, OP_CLOSE, NULL, NULL, NULL);
15334 15334 close_failed = 1;
15335 15335 force_close = 0;
15336 15336 goto close_cleanup;
15337 15337 }
15338 15338
15339 15339 /*
15340 15340 * If a previous OTW call got NFS4ERR_BAD_SEQID, then
15341 15341 * we stopped operating on the open owner's <old oo_name, old seqid>
15342 15342 * space, which means we stopped operating on the open stream
15343 15343 * too. So don't go OTW (as the seqid is likely bad, and the
15344 15344 * stateid could be stale, potentially triggering a false
15345 15345 * setclientid), and just clean up the client's internal state.
15346 15346 */
15347 15347 if (osp->os_orig_oo_name != oop->oo_name) {
15348 15348 NFS4_DEBUG(nfs4close_one_debug || nfs4_client_recov_debug,
15349 15349 (CE_NOTE, "nfs4close_one: skip OTW close for osp %p "
15350 15350 "oop %p due to bad seqid (orig oo_name %" PRIx64 " current "
15351 15351 "oo_name %" PRIx64")",
15352 15352 (void *)osp, (void *)oop, osp->os_orig_oo_name,
15353 15353 oop->oo_name));
15354 15354 close_failed = 1;
15355 15355 }
15356 15356
15357 15357 /* If the file failed recovery, just quit. */
15358 15358 mutex_enter(&rp->r_statelock);
15359 15359 if (rp->r_flags & R4RECOVERR) {
15360 15360 close_failed = 1;
15361 15361 }
15362 15362 mutex_exit(&rp->r_statelock);
15363 15363
15364 15364 /*
15365 15365 * If the force close path failed to obtain start_fop
15366 15366 * then skip the OTW close and just remove the state.
15367 15367 */
15368 15368 if (close_failed)
15369 15369 goto close_cleanup;
15370 15370
15371 15371 /*
15372 15372 * Fifth, check to see if there are still mapped pages or other
15373 15373 * opens using this open stream. If there are then we can't
15374 15374 * close yet but we can see if an OPEN_DOWNGRADE is necessary.
15375 15375 */
15376 15376 if (osp->os_open_ref_count > 0 || osp->os_mapcnt > 0) {
15377 15377 nfs4_lost_rqst_t new_lost_rqst;
15378 15378 bool_t needrecov = FALSE;
15379 15379 cred_t *odg_cred_otw = NULL;
15380 15380 seqid4 open_dg_seqid = 0;
15381 15381
15382 15382 if (osp->os_delegation) {
15383 15383 /*
15384 15384 * If this open stream was never OPENed OTW then we
15385 15385 * surely can't DOWNGRADE it (especially since the
15386 15386 * osp->open_stateid is really a delegation stateid
15387 15387 * when os_delegation is 1).
15388 15388 */
15389 15389 if (access_bits & FREAD)
15390 15390 osp->os_share_acc_read--;
15391 15391 if (access_bits & FWRITE)
15392 15392 osp->os_share_acc_write--;
15393 15393 osp->os_share_deny_none--;
15394 15394 nfs4_error_zinit(ep);
15395 15395 goto out;
15396 15396 }
15397 15397 nfs4_open_downgrade(access_bits, 0, oop, osp, vp, cr,
15398 15398 lrp, ep, &odg_cred_otw, &open_dg_seqid);
15399 15399 needrecov = nfs4_needs_recovery(ep, TRUE, mi->mi_vfsp);
15400 15400 if (needrecov && !isrecov) {
15401 15401 bool_t abort;
15402 15402 nfs4_bseqid_entry_t *bsep = NULL;
15403 15403
15404 15404 if (!ep->error && ep->stat == NFS4ERR_BAD_SEQID)
15405 15405 bsep = nfs4_create_bseqid_entry(oop, NULL,
15406 15406 vp, 0,
15407 15407 lrp ? TAG_OPEN_DG_LOST : TAG_OPEN_DG,
15408 15408 open_dg_seqid);
15409 15409
15410 15410 nfs4open_dg_save_lost_rqst(ep->error, &new_lost_rqst,
15411 15411 oop, osp, odg_cred_otw, vp, access_bits, 0);
15412 15412 mutex_exit(&osp->os_sync_lock);
15413 15413 have_sync_lock = 0;
15414 15414 abort = nfs4_start_recovery(ep, mi, vp, NULL, NULL,
15415 15415 new_lost_rqst.lr_op == OP_OPEN_DOWNGRADE ?
15416 15416 &new_lost_rqst : NULL, OP_OPEN_DOWNGRADE,
15417 15417 bsep, NULL, NULL);
15418 15418 if (odg_cred_otw)
15419 15419 crfree(odg_cred_otw);
15420 15420 if (bsep)
15421 15421 kmem_free(bsep, sizeof (*bsep));
15422 15422
15423 15423 if (abort == TRUE)
15424 15424 goto out;
15425 15425
15426 15426 if (did_start_seqid_sync) {
15427 15427 nfs4_end_open_seqid_sync(oop);
15428 15428 did_start_seqid_sync = 0;
15429 15429 }
15430 15430 open_stream_rele(osp, rp);
15431 15431
15432 15432 if (did_start_op)
15433 15433 nfs4_end_fop(mi, vp, NULL, OH_CLOSE,
15434 15434 &recov_state, FALSE);
15435 15435 if (did_force_recovlock)
15436 15436 nfs_rw_exit(&mi->mi_recovlock);
15437 15437
15438 15438 goto recov_retry;
15439 15439 } else {
15440 15440 if (odg_cred_otw)
15441 15441 crfree(odg_cred_otw);
15442 15442 }
15443 15443 goto out;
15444 15444 }
15445 15445
15446 15446 /*
15447 15447 * If this open stream was created as the results of an open
15448 15448 * while holding a delegation, then just release it; no need
15449 15449 * to do an OTW close. Otherwise do a "normal" OTW close.
15450 15450 */
15451 15451 if (osp->os_delegation) {
15452 15452 nfs4close_notw(vp, osp, &have_sync_lock);
15453 15453 nfs4_error_zinit(ep);
15454 15454 goto out;
15455 15455 }
15456 15456
15457 15457 /*
15458 15458 * If this stream is not valid, we're done.
15459 15459 */
15460 15460 if (!osp->os_valid) {
15461 15461 nfs4_error_zinit(ep);
15462 15462 goto out;
15463 15463 }
15464 15464
15465 15465 /*
15466 15466 * Last open or mmap ref has vanished, need to do an OTW close.
15467 15467 * First check to see if a close is still necessary.
15468 15468 */
15469 15469 if (osp->os_failed_reopen) {
15470 15470 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
15471 15471 "don't close OTW osp %p since reopen failed.",
15472 15472 (void *)osp));
15473 15473 /*
15474 15474 * Reopen of the open stream failed, hence the
15475 15475 * stateid of the open stream is invalid/stale, and
15476 15476 * sending this OTW would incorrectly cause another
15477 15477 * round of recovery. In this case, we need to set
15478 15478 * the 'os_valid' bit to 0 so another thread doesn't
15479 15479 * come in and re-open this open stream before
15480 15480 * this "closing" thread cleans up state (decrementing
15481 15481 * the nfs4_server_t's state_ref_count and decrementing
15482 15482 * the os_ref_count).
15483 15483 */
15484 15484 osp->os_valid = 0;
15485 15485 /*
15486 15486 * This removes the reference obtained at OPEN; ie,
15487 15487 * when the open stream structure was created.
15488 15488 *
15489 15489 * We don't have to worry about calling 'open_stream_rele'
15490 15490 * since we our currently holding a reference to this
15491 15491 * open stream which means the count can not go to 0 with
15492 15492 * this decrement.
15493 15493 */
15494 15494 ASSERT(osp->os_ref_count >= 2);
15495 15495 osp->os_ref_count--;
15496 15496 nfs4_error_zinit(ep);
15497 15497 close_failed = 0;
15498 15498 goto close_cleanup;
15499 15499 }
15500 15500
15501 15501 ASSERT(osp->os_ref_count > 1);
15502 15502
15503 15503 /*
15504 15504 * Sixth, try the CLOSE OTW.
15505 15505 */
15506 15506 nfs4close_otw(rp, cred_otw, oop, osp, &retry, &did_start_seqid_sync,
15507 15507 close_type, ep, &have_sync_lock);
15508 15508
15509 15509 if (ep->error == EINTR || NFS4_FRC_UNMT_ERR(ep->error, vp->v_vfsp)) {
15510 15510 /*
15511 15511 * Let the recovery thread be responsible for
15512 15512 * removing the state for CLOSE.
15513 15513 */
15514 15514 close_failed = 1;
15515 15515 force_close = 0;
15516 15516 retry = 0;
15517 15517 }
15518 15518
15519 15519 /* See if we need to retry with a different cred */
15520 15520 if ((ep->error == EACCES ||
15521 15521 (ep->error == 0 && ep->stat == NFS4ERR_ACCESS)) &&
15522 15522 cred_otw != cr) {
15523 15523 crfree(cred_otw);
15524 15524 cred_otw = cr;
15525 15525 crhold(cred_otw);
15526 15526 retry = 1;
15527 15527 }
15528 15528
15529 15529 if (ep->error || ep->stat)
15530 15530 close_failed = 1;
15531 15531
15532 15532 if (retry && !isrecov && num_retries-- > 0) {
15533 15533 if (have_sync_lock) {
15534 15534 mutex_exit(&osp->os_sync_lock);
15535 15535 have_sync_lock = 0;
15536 15536 }
15537 15537 if (did_start_seqid_sync) {
15538 15538 nfs4_end_open_seqid_sync(oop);
15539 15539 did_start_seqid_sync = 0;
15540 15540 }
15541 15541 open_stream_rele(osp, rp);
15542 15542
15543 15543 if (did_start_op)
15544 15544 nfs4_end_fop(mi, vp, NULL, OH_CLOSE,
15545 15545 &recov_state, FALSE);
15546 15546 if (did_force_recovlock)
15547 15547 nfs_rw_exit(&mi->mi_recovlock);
15548 15548 NFS4_DEBUG(nfs4_client_recov_debug, (CE_NOTE,
15549 15549 "nfs4close_one: need to retry the close "
15550 15550 "operation"));
15551 15551 goto recov_retry;
15552 15552 }
15553 15553 close_cleanup:
15554 15554 /*
15555 15555 * Seventh and lastly, process our results.
15556 15556 */
15557 15557 if (close_failed && force_close) {
15558 15558 /*
15559 15559 * It's ok to drop and regrab the 'os_sync_lock' since
15560 15560 * nfs4close_notw() will recheck to make sure the
15561 15561 * "close"/removal of state should happen.
15562 15562 */
15563 15563 if (!have_sync_lock) {
15564 15564 mutex_enter(&osp->os_sync_lock);
15565 15565 have_sync_lock = 1;
15566 15566 }
15567 15567 /*
15568 15568 * This is last call, remove the ref on the open
15569 15569 * stream created by open and clean everything up.
15570 15570 */
15571 15571 osp->os_pending_close = 0;
15572 15572 nfs4close_notw(vp, osp, &have_sync_lock);
15573 15573 nfs4_error_zinit(ep);
15574 15574 }
15575 15575
15576 15576 if (!close_failed) {
15577 15577 if (have_sync_lock) {
15578 15578 osp->os_pending_close = 0;
15579 15579 mutex_exit(&osp->os_sync_lock);
15580 15580 have_sync_lock = 0;
15581 15581 } else {
15582 15582 mutex_enter(&osp->os_sync_lock);
15583 15583 osp->os_pending_close = 0;
15584 15584 mutex_exit(&osp->os_sync_lock);
15585 15585 }
15586 15586 if (did_start_op && recov_state.rs_sp != NULL) {
15587 15587 mutex_enter(&recov_state.rs_sp->s_lock);
15588 15588 nfs4_dec_state_ref_count_nolock(recov_state.rs_sp, mi);
15589 15589 mutex_exit(&recov_state.rs_sp->s_lock);
15590 15590 } else {
15591 15591 nfs4_dec_state_ref_count(mi);
15592 15592 }
15593 15593 nfs4_error_zinit(ep);
15594 15594 }
15595 15595
15596 15596 out:
15597 15597 if (have_sync_lock)
15598 15598 mutex_exit(&osp->os_sync_lock);
15599 15599 if (did_start_op)
15600 15600 nfs4_end_fop(mi, vp, NULL, OH_CLOSE, &recov_state,
15601 15601 recovonly ? TRUE : FALSE);
15602 15602 if (did_force_recovlock)
15603 15603 nfs_rw_exit(&mi->mi_recovlock);
15604 15604 if (cred_otw)
15605 15605 crfree(cred_otw);
15606 15606 if (osp)
15607 15607 open_stream_rele(osp, rp);
15608 15608 if (oop) {
15609 15609 if (did_start_seqid_sync)
15610 15610 nfs4_end_open_seqid_sync(oop);
15611 15611 open_owner_rele(oop);
15612 15612 }
15613 15613 }
15614 15614
15615 15615 /*
15616 15616 * Convert information returned by the server in the LOCK4denied
15617 15617 * structure to the form required by fcntl.
15618 15618 */
15619 15619 static void
15620 15620 denied_to_flk(LOCK4denied *lockt_denied, flock64_t *flk, LOCKT4args *lockt_args)
15621 15621 {
15622 15622 nfs4_lo_name_t *lo;
15623 15623
15624 15624 #ifdef DEBUG
15625 15625 if (denied_to_flk_debug) {
15626 15626 lockt_denied_debug = lockt_denied;
15627 15627 debug_enter("lockt_denied");
15628 15628 }
15629 15629 #endif
15630 15630
15631 15631 flk->l_type = lockt_denied->locktype == READ_LT ? F_RDLCK : F_WRLCK;
15632 15632 flk->l_whence = 0; /* aka SEEK_SET */
15633 15633 flk->l_start = lockt_denied->offset;
15634 15634 flk->l_len = lockt_denied->length;
15635 15635
15636 15636 /*
15637 15637 * If the blocking clientid matches our client id, then we can
15638 15638 * interpret the lockowner (since we built it). If not, then
15639 15639 * fabricate a sysid and pid. Note that the l_sysid field
15640 15640 * in *flk already has the local sysid.
15641 15641 */
15642 15642
15643 15643 if (lockt_denied->owner.clientid == lockt_args->owner.clientid) {
15644 15644
15645 15645 if (lockt_denied->owner.owner_len == sizeof (*lo)) {
15646 15646 lo = (nfs4_lo_name_t *)
15647 15647 lockt_denied->owner.owner_val;
15648 15648
15649 15649 flk->l_pid = lo->ln_pid;
15650 15650 } else {
15651 15651 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
15652 15652 "denied_to_flk: bad lock owner length\n"));
15653 15653
15654 15654 flk->l_pid = lo_to_pid(&lockt_denied->owner);
15655 15655 }
15656 15656 } else {
15657 15657 NFS4_DEBUG(nfs4_client_lock_debug, (CE_NOTE,
15658 15658 "denied_to_flk: foreign clientid\n"));
15659 15659
15660 15660 /*
15661 15661 * Construct a new sysid which should be different from
15662 15662 * sysids of other systems.
15663 15663 */
15664 15664
15665 15665 flk->l_sysid++;
15666 15666 flk->l_pid = lo_to_pid(&lockt_denied->owner);
15667 15667 }
15668 15668 }
15669 15669
15670 15670 static pid_t
15671 15671 lo_to_pid(lock_owner4 *lop)
15672 15672 {
15673 15673 pid_t pid = 0;
15674 15674 uchar_t *cp;
15675 15675 int i;
15676 15676
15677 15677 cp = (uchar_t *)&lop->clientid;
15678 15678
15679 15679 for (i = 0; i < sizeof (lop->clientid); i++)
15680 15680 pid += (pid_t)*cp++;
15681 15681
15682 15682 cp = (uchar_t *)lop->owner_val;
15683 15683
15684 15684 for (i = 0; i < lop->owner_len; i++)
15685 15685 pid += (pid_t)*cp++;
15686 15686
15687 15687 return (pid);
15688 15688 }
15689 15689
15690 15690 /*
15691 15691 * Given a lock pointer, returns the length of that lock.
15692 15692 * "end" is the last locked offset the "l_len" covers from
15693 15693 * the start of the lock.
15694 15694 */
15695 15695 static off64_t
15696 15696 lock_to_end(flock64_t *lock)
15697 15697 {
15698 15698 off64_t lock_end;
15699 15699
15700 15700 if (lock->l_len == 0)
15701 15701 lock_end = (off64_t)MAXEND;
15702 15702 else
15703 15703 lock_end = lock->l_start + lock->l_len - 1;
15704 15704
15705 15705 return (lock_end);
15706 15706 }
15707 15707
15708 15708 /*
15709 15709 * Given the end of a lock, it will return you the length "l_len" for that lock.
15710 15710 */
15711 15711 static off64_t
15712 15712 end_to_len(off64_t start, off64_t end)
15713 15713 {
15714 15714 off64_t lock_len;
15715 15715
15716 15716 ASSERT(end >= start);
15717 15717 if (end == MAXEND)
15718 15718 lock_len = 0;
15719 15719 else
15720 15720 lock_len = end - start + 1;
15721 15721
15722 15722 return (lock_len);
15723 15723 }
15724 15724
15725 15725 /*
15726 15726 * On given end for a lock it determines if it is the last locked offset
15727 15727 * or not, if so keeps it as is, else adds one to return the length for
15728 15728 * valid start.
15729 15729 */
15730 15730 static off64_t
15731 15731 start_check(off64_t x)
15732 15732 {
15733 15733 if (x == MAXEND)
15734 15734 return (x);
15735 15735 else
15736 15736 return (x + 1);
15737 15737 }
15738 15738
15739 15739 /*
15740 15740 * See if these two locks overlap, and if so return 1;
15741 15741 * otherwise, return 0.
15742 15742 */
15743 15743 static int
15744 15744 locks_intersect(flock64_t *llfp, flock64_t *curfp)
15745 15745 {
15746 15746 off64_t llfp_end, curfp_end;
15747 15747
15748 15748 llfp_end = lock_to_end(llfp);
15749 15749 curfp_end = lock_to_end(curfp);
15750 15750
15751 15751 if (((llfp_end >= curfp->l_start) &&
15752 15752 (llfp->l_start <= curfp->l_start)) ||
15753 15753 ((curfp->l_start <= llfp->l_start) && (curfp_end >= llfp->l_start)))
15754 15754 return (1);
15755 15755 return (0);
15756 15756 }
15757 15757
15758 15758 /*
15759 15759 * Determine what the intersecting lock region is, and add that to the
15760 15760 * 'nl_llpp' locklist in increasing order (by l_start).
15761 15761 */
15762 15762 static void
15763 15763 nfs4_add_lock_range(flock64_t *lost_flp, flock64_t *local_flp,
15764 15764 locklist_t **nl_llpp, vnode_t *vp)
15765 15765 {
15766 15766 locklist_t *intersect_llp, *tmp_fllp, *cur_fllp;
15767 15767 off64_t lost_flp_end, local_flp_end, len, start;
15768 15768
15769 15769 NFS4_DEBUG(nfs4_lost_rqst_debug, (CE_NOTE, "nfs4_add_lock_range:"));
15770 15770
15771 15771 if (!locks_intersect(lost_flp, local_flp))
15772 15772 return;
15773 15773
15774 15774 NFS4_DEBUG(nfs4_lost_rqst_debug, (CE_NOTE, "nfs4_add_lock_range: "
15775 15775 "locks intersect"));
15776 15776
15777 15777 lost_flp_end = lock_to_end(lost_flp);
15778 15778 local_flp_end = lock_to_end(local_flp);
15779 15779
15780 15780 /* Find the starting point of the intersecting region */
15781 15781 if (local_flp->l_start > lost_flp->l_start)
15782 15782 start = local_flp->l_start;
15783 15783 else
15784 15784 start = lost_flp->l_start;
15785 15785
15786 15786 /* Find the lenght of the intersecting region */
15787 15787 if (lost_flp_end < local_flp_end)
15788 15788 len = end_to_len(start, lost_flp_end);
15789 15789 else
15790 15790 len = end_to_len(start, local_flp_end);
15791 15791
15792 15792 /*
15793 15793 * Prepare the flock structure for the intersection found and insert
15794 15794 * it into the new list in increasing l_start order. This list contains
15795 15795 * intersections of locks registered by the client with the local host
15796 15796 * and the lost lock.
15797 15797 * The lock type of this lock is the same as that of the local_flp.
15798 15798 */
15799 15799 intersect_llp = (locklist_t *)kmem_alloc(sizeof (locklist_t), KM_SLEEP);
15800 15800 intersect_llp->ll_flock.l_start = start;
15801 15801 intersect_llp->ll_flock.l_len = len;
15802 15802 intersect_llp->ll_flock.l_type = local_flp->l_type;
15803 15803 intersect_llp->ll_flock.l_pid = local_flp->l_pid;
15804 15804 intersect_llp->ll_flock.l_sysid = local_flp->l_sysid;
15805 15805 intersect_llp->ll_flock.l_whence = 0; /* aka SEEK_SET */
15806 15806 intersect_llp->ll_vp = vp;
15807 15807
15808 15808 tmp_fllp = *nl_llpp;
15809 15809 cur_fllp = NULL;
15810 15810 while (tmp_fllp != NULL && tmp_fllp->ll_flock.l_start <
15811 15811 intersect_llp->ll_flock.l_start) {
15812 15812 cur_fllp = tmp_fllp;
15813 15813 tmp_fllp = tmp_fllp->ll_next;
15814 15814 }
15815 15815 if (cur_fllp == NULL) {
15816 15816 /* first on the list */
15817 15817 intersect_llp->ll_next = *nl_llpp;
15818 15818 *nl_llpp = intersect_llp;
15819 15819 } else {
15820 15820 intersect_llp->ll_next = cur_fllp->ll_next;
15821 15821 cur_fllp->ll_next = intersect_llp;
15822 15822 }
15823 15823
15824 15824 NFS4_DEBUG(nfs4_lost_rqst_debug, (CE_NOTE, "nfs4_add_lock_range: "
15825 15825 "created lock region: start %"PRIx64" end %"PRIx64" : %s\n",
15826 15826 intersect_llp->ll_flock.l_start,
15827 15827 intersect_llp->ll_flock.l_start + intersect_llp->ll_flock.l_len,
15828 15828 intersect_llp->ll_flock.l_type == F_RDLCK ? "READ" : "WRITE"));
15829 15829 }
15830 15830
15831 15831 /*
15832 15832 * Our local locking current state is potentially different than
15833 15833 * what the NFSv4 server thinks we have due to a lost lock that was
15834 15834 * resent and then received. We need to reset our "NFSv4" locking
15835 15835 * state to match the current local locking state for this pid since
15836 15836 * that is what the user/application sees as what the world is.
15837 15837 *
15838 15838 * We cannot afford to drop the open/lock seqid sync since then we can
15839 15839 * get confused about what the current local locking state "is" versus
15840 15840 * "was".
15841 15841 *
15842 15842 * If we are unable to fix up the locks, we send SIGLOST to the affected
15843 15843 * process. This is not done if the filesystem has been forcibly
15844 15844 * unmounted, in case the process has already exited and a new process
15845 15845 * exists with the same pid.
15846 15846 */
15847 15847 static void
15848 15848 nfs4_reinstitute_local_lock_state(vnode_t *vp, flock64_t *lost_flp, cred_t *cr,
15849 15849 nfs4_lock_owner_t *lop)
15850 15850 {
15851 15851 locklist_t *locks, *llp, *ri_llp, *tmp_llp;
15852 15852 mntinfo4_t *mi = VTOMI4(vp);
15853 15853 const int cmd = F_SETLK;
15854 15854 off64_t cur_start, llp_ll_flock_end, lost_flp_end;
15855 15855 flock64_t ul_fl;
15856 15856
15857 15857 NFS4_DEBUG(nfs4_lost_rqst_debug, (CE_NOTE,
15858 15858 "nfs4_reinstitute_local_lock_state"));
15859 15859
15860 15860 /*
15861 15861 * Find active locks for this vp from the local locking code.
15862 15862 * Scan through this list and find out the locks that intersect with
15863 15863 * the lost lock. Once we find the lock that intersects, add the
15864 15864 * intersection area as a new lock to a new list "ri_llp". The lock
15865 15865 * type of the intersection region lock added to ri_llp is the same
15866 15866 * as that found in the active lock list, "list". The intersecting
15867 15867 * region locks are added to ri_llp in increasing l_start order.
15868 15868 */
15869 15869 ASSERT(nfs_zone() == mi->mi_zone);
15870 15870
15871 15871 locks = flk_active_locks_for_vp(vp);
15872 15872 ri_llp = NULL;
15873 15873
15874 15874 for (llp = locks; llp != NULL; llp = llp->ll_next) {
15875 15875 ASSERT(llp->ll_vp == vp);
15876 15876 /*
15877 15877 * Pick locks that belong to this pid/lockowner
15878 15878 */
15879 15879 if (llp->ll_flock.l_pid != lost_flp->l_pid)
15880 15880 continue;
15881 15881
15882 15882 nfs4_add_lock_range(lost_flp, &llp->ll_flock, &ri_llp, vp);
15883 15883 }
15884 15884
15885 15885 /*
15886 15886 * Now we have the list of intersections with the lost lock. These are
15887 15887 * the locks that were/are active before the server replied to the
15888 15888 * last/lost lock. Issue these locks to the server here. Playing these
15889 15889 * locks to the server will re-establish aur current local locking state
15890 15890 * with the v4 server.
15891 15891 * If we get an error, send SIGLOST to the application for that lock.
15892 15892 */
15893 15893
15894 15894 for (llp = ri_llp; llp != NULL; llp = llp->ll_next) {
15895 15895 NFS4_DEBUG(nfs4_lost_rqst_debug, (CE_NOTE,
15896 15896 "nfs4_reinstitute_local_lock_state: need to issue "
15897 15897 "flock: [%"PRIx64" - %"PRIx64"] : %s",
15898 15898 llp->ll_flock.l_start,
15899 15899 llp->ll_flock.l_start + llp->ll_flock.l_len,
15900 15900 llp->ll_flock.l_type == F_RDLCK ? "READ" :
15901 15901 llp->ll_flock.l_type == F_WRLCK ? "WRITE" : "INVALID"));
15902 15902 /*
15903 15903 * No need to relock what we already have
15904 15904 */
15905 15905 if (llp->ll_flock.l_type == lost_flp->l_type)
15906 15906 continue;
15907 15907
15908 15908 push_reinstate(vp, cmd, &llp->ll_flock, cr, lop);
15909 15909 }
15910 15910
15911 15911 /*
15912 15912 * Now keeping the start of the lost lock as our reference parse the
15913 15913 * newly created ri_llp locklist to find the ranges that we have locked
15914 15914 * with the v4 server but not in the current local locking. We need
15915 15915 * to unlock these ranges.
15916 15916 * These ranges can also be reffered to as those ranges, where the lost
15917 15917 * lock does not overlap with the locks in the ri_llp but are locked
15918 15918 * since the server replied to the lost lock.
15919 15919 */
15920 15920 cur_start = lost_flp->l_start;
15921 15921 lost_flp_end = lock_to_end(lost_flp);
15922 15922
15923 15923 ul_fl.l_type = F_UNLCK;
15924 15924 ul_fl.l_whence = 0; /* aka SEEK_SET */
15925 15925 ul_fl.l_sysid = lost_flp->l_sysid;
15926 15926 ul_fl.l_pid = lost_flp->l_pid;
15927 15927
15928 15928 for (llp = ri_llp; llp != NULL; llp = llp->ll_next) {
15929 15929 llp_ll_flock_end = lock_to_end(&llp->ll_flock);
15930 15930
15931 15931 if (llp->ll_flock.l_start <= cur_start) {
15932 15932 cur_start = start_check(llp_ll_flock_end);
15933 15933 continue;
15934 15934 }
15935 15935 NFS4_DEBUG(nfs4_lost_rqst_debug, (CE_NOTE,
15936 15936 "nfs4_reinstitute_local_lock_state: "
15937 15937 "UNLOCK [%"PRIx64" - %"PRIx64"]",
15938 15938 cur_start, llp->ll_flock.l_start));
15939 15939
15940 15940 ul_fl.l_start = cur_start;
15941 15941 ul_fl.l_len = end_to_len(cur_start,
15942 15942 (llp->ll_flock.l_start - 1));
15943 15943
15944 15944 push_reinstate(vp, cmd, &ul_fl, cr, lop);
15945 15945 cur_start = start_check(llp_ll_flock_end);
15946 15946 }
15947 15947
15948 15948 /*
15949 15949 * In the case where the lost lock ends after all intersecting locks,
15950 15950 * unlock the last part of the lost lock range.
15951 15951 */
15952 15952 if (cur_start != start_check(lost_flp_end)) {
15953 15953 NFS4_DEBUG(nfs4_lost_rqst_debug, (CE_NOTE,
15954 15954 "nfs4_reinstitute_local_lock_state: UNLOCK end of the "
15955 15955 "lost lock region [%"PRIx64" - %"PRIx64"]",
15956 15956 cur_start, lost_flp->l_start + lost_flp->l_len));
15957 15957
15958 15958 ul_fl.l_start = cur_start;
15959 15959 /*
15960 15960 * Is it an to-EOF lock? if so unlock till the end
15961 15961 */
15962 15962 if (lost_flp->l_len == 0)
15963 15963 ul_fl.l_len = 0;
15964 15964 else
15965 15965 ul_fl.l_len = start_check(lost_flp_end) - cur_start;
15966 15966
15967 15967 push_reinstate(vp, cmd, &ul_fl, cr, lop);
15968 15968 }
15969 15969
15970 15970 if (locks != NULL)
15971 15971 flk_free_locklist(locks);
15972 15972
15973 15973 /* Free up our newly created locklist */
15974 15974 for (llp = ri_llp; llp != NULL; ) {
15975 15975 tmp_llp = llp->ll_next;
15976 15976 kmem_free(llp, sizeof (locklist_t));
15977 15977 llp = tmp_llp;
15978 15978 }
15979 15979
15980 15980 /*
15981 15981 * Now return back to the original calling nfs4frlock()
15982 15982 * and let us naturally drop our seqid syncs.
15983 15983 */
15984 15984 }
15985 15985
15986 15986 /*
15987 15987 * Create a lost state record for the given lock reinstantiation request
15988 15988 * and push it onto the lost state queue.
15989 15989 */
15990 15990 static void
15991 15991 push_reinstate(vnode_t *vp, int cmd, flock64_t *flk, cred_t *cr,
15992 15992 nfs4_lock_owner_t *lop)
15993 15993 {
15994 15994 nfs4_lost_rqst_t req;
15995 15995 nfs_lock_type4 locktype;
15996 15996 nfs4_error_t e = { EINTR, NFS4_OK, RPC_SUCCESS };
15997 15997
15998 15998 ASSERT(nfs_zone() == VTOMI4(vp)->mi_zone);
15999 15999
16000 16000 locktype = flk_to_locktype(cmd, flk->l_type);
16001 16001 nfs4frlock_save_lost_rqst(NFS4_LCK_CTYPE_REINSTATE, EINTR, locktype,
16002 16002 NULL, NULL, lop, flk, &req, cr, vp);
16003 16003 (void) nfs4_start_recovery(&e, VTOMI4(vp), vp, NULL, NULL,
16004 16004 (req.lr_op == OP_LOCK || req.lr_op == OP_LOCKU) ?
16005 16005 &req : NULL, flk->l_type == F_UNLCK ? OP_LOCKU : OP_LOCK,
16006 16006 NULL, NULL, NULL);
16007 16007 }
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