1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright 2016 Nexenta Systems, Inc. All rights reserved.
25 * Copyright 2016 Jason King.
26 */
27
28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30
31 #ifndef _NFS_EXPORT_H
32 #define _NFS_EXPORT_H
33
34 #include <nfs/nfs_sec.h>
35 #include <nfs/auth.h>
36 #include <sys/vnode.h>
37 #include <nfs/nfs4.h>
38 #include <sys/kiconv.h>
39 #include <sys/avl.h>
40
41 #ifdef __cplusplus
42 extern "C" {
43 #endif
44
45 /*
46 * nfs pseudo flavor number is owned by IANA. Need to make sure the
47 * Solaris specific NFS_FLAVOR_NOMAP number will not overlap with any
48 * new IANA defined pseudo flavor numbers. The chance for the overlap
49 * is very small since the growth of new flavor numbers is expected
50 * to be limited.
51 */
52 #define NFS_FLAVOR_NOMAP 999999 /* no nfs flavor mapping */
53
54 /*
55 * As duplicate flavors can be passed into exportfs in the arguments, we
56 * allocate a cleaned up array with non duplicate flavors on the stack.
57 * So we need to know how much to allocate.
58 */
59 #define MAX_FLAVORS 6 /* none, sys, dh, krb5, krb5i krb5p */
60
61 /*
62 * Note: exported_lock is currently used to ensure the integrity of
63 * the secinfo fields.
64 */
65 struct secinfo {
66 seconfig_t s_secinfo; /* /etc/nfssec.conf entry */
67 unsigned int s_flags; /* flags (see below) */
68 int32_t s_refcnt; /* reference count for tracking */
69 /* how many children (self included) */
70 /* use this flavor. */
71 int s_window; /* window */
72 uint_t s_rootid; /* UID to use for authorized roots */
73 int s_rootcnt; /* count of root names */
74 caddr_t *s_rootnames; /* array of root names */
75 /* they are strings for AUTH_DES and */
76 /* rpc_gss_principal_t for RPCSEC_GSS */
77 };
78
79 #ifdef _SYSCALL32
80 struct secinfo32 {
81 seconfig32_t s_secinfo; /* /etc/nfssec.conf entry */
82 uint32_t s_flags; /* flags (see below) */
83 int32_t s_refcnt; /* reference count for tracking */
84 /* how many children (self included) */
85 /* use this flavor. */
86 int32_t s_window; /* window */
87 uint32_t s_rootid; /* UID to use for authorized roots */
88 int32_t s_rootcnt; /* count of root names */
89 caddr32_t s_rootnames; /* array of root names */
90 /* they are strings for AUTH_DES and */
91 /* rpc_gss_principal_t for RPCSEC_GSS */
92 };
93 #endif /* _SYSCALL32 */
94
95 /*
96 * security negotiation related
97 */
98
99 #define SEC_QUERY 0x01 /* query sec modes */
100
101 struct sec_ol {
102 int sec_flags; /* security nego flags */
103 uint_t sec_index; /* index into sec flavor array */
104 };
105
106 /*
107 * Per-mode flags (secinfo.s_flags)
108 */
109 #define M_RO 0x01 /* exported ro to all */
110 #define M_ROL 0x02 /* exported ro to all listed */
111 #define M_RW 0x04 /* exported rw to all */
112 #define M_RWL 0x08 /* exported ro to all listed */
113 #define M_ROOT 0x10 /* root list is defined */
114 #define M_4SEC_EXPORTED 0x20 /* this is an explicitly shared flavor */
115 #define M_NONE 0x40 /* none list is defined */
116 #define M_MAP 0x80 /* uidmap and/or gidmap is defined */
117
118 /* invalid secinfo reference count */
119 #define SEC_REF_INVALID(p) ((p)->s_refcnt < 1)
120
121 /* last secinfo reference */
122 #define SEC_REF_LAST(p) ((p)->s_refcnt == 1)
123
124 /* sec flavor explicitly shared for the exported node */
125 #define SEC_REF_EXPORTED(p) ((p)->s_flags & M_4SEC_EXPORTED)
126
127 /* the only reference count left is for referring itself */
128 #define SEC_REF_SELF(p) (SEC_REF_LAST(p) && SEC_REF_EXPORTED(p))
129
130 /*
131 * The export information passed to exportfs() (Version 2)
132 */
133 #define EX_CURRENT_VERSION 2 /* current version of exportdata struct */
134
135 struct exportdata {
136 int ex_version; /* structure version */
137 char *ex_path; /* exported path */
138 size_t ex_pathlen; /* path length */
139 int ex_flags; /* flags */
140 unsigned int ex_anon; /* uid for unauthenticated requests */
141 int ex_seccnt; /* count of security modes */
142 struct secinfo *ex_secinfo; /* security mode info */
143 char *ex_index; /* index file for public filesystem */
144 char *ex_log_buffer; /* path to logging buffer file */
145 size_t ex_log_bufferlen; /* buffer file path len */
146 char *ex_tag; /* tag used to identify log config */
147 size_t ex_taglen; /* tag length */
148 };
149
150 #ifdef _SYSCALL32
151 struct exportdata32 {
152 int32_t ex_version; /* structure version */
153 caddr32_t ex_path; /* exported path */
154 int32_t ex_pathlen; /* path length */
155 int32_t ex_flags; /* flags */
156 uint32_t ex_anon; /* uid for unauthenticated requests */
157 int32_t ex_seccnt; /* count of security modes */
158 caddr32_t ex_secinfo; /* security mode info */
159 caddr32_t ex_index; /* index file for public filesystem */
160 caddr32_t ex_log_buffer; /* path to logging buffer file */
161 int32_t ex_log_bufferlen; /* buffer file path len */
162 caddr32_t ex_tag; /* tag used to identify log config */
163 int32_t ex_taglen; /* tag length */
164 };
165 #endif /* _SYSCALL32 */
166
167 /*
168 * exported vfs flags.
169 */
170
171 #define EX_NOSUID 0x01 /* exported with unsetable set[ug]ids */
172 #define EX_ACLOK 0x02 /* exported with maximal access if acl exists */
173 #define EX_PUBLIC 0x04 /* exported with public filehandle */
174 #define EX_NOSUB 0x08 /* no nfs_getfh or MCL below export point */
175 #define EX_INDEX 0x10 /* exported with index file specified */
176 #define EX_LOG 0x20 /* logging enabled */
177 #define EX_LOG_ALLOPS 0x40 /* logging of all RPC operations enabled */
178 /* by default only operations which affect */
179 /* transaction logging are enabled */
180 #define EX_PSEUDO 0x80 /* pseudo filesystem export */
181 #ifdef VOLATILE_FH_TEST
182 #define EX_VOLFH 0x100 /* XXX nfsv4 fh may expire anytime */
183 #define EX_VOLRNM 0x200 /* XXX nfsv4 fh expire at rename */
184 #define EX_VOLMIG 0x400 /* XXX nfsv4 fh expire at migration */
185 #define EX_NOEXPOPEN 0x800 /* XXX nfsv4 fh no expire with open */
186 #endif /* VOLATILE_FH_TEST */
187
188 #define EX_CHARMAP 0x1000 /* NFS may need a character set conversion */
189 #define EX_NOACLFAB 0x2000 /* If set, NFSv2 and v3 servers won't */
190 /* fabricate an aclent_t ACL on file systems */
191 /* that don't support aclent_t ACLs */
192 #define EX_NOHIDE 0x4000 /* traversable from exported parent */
193
194 #ifdef _KERNEL
195
196 #define RPC_IDEMPOTENT 0x1 /* idempotent or not */
197 /*
198 * Be very careful about which NFS procedures get the RPC_ALLOWANON bit.
199 * Right now, if this bit is on, we ignore the results of per NFS request
200 * access control.
201 */
202 #define RPC_ALLOWANON 0x2 /* allow anonymous access */
203 #define RPC_MAPRESP 0x4 /* use mapped response buffer */
204 #define RPC_AVOIDWORK 0x8 /* do work avoidance for dups */
205 #define RPC_PUBLICFH_OK 0x10 /* allow use of public filehandle */
206
207 /*
208 * RPC_ALL is an or of all above bits to be used with "don't care"
209 * nfsv4 ops. The flags of an nfsv4 request is the bit-AND of the
210 * per-op flags.
211 */
212 #define RPC_ALL (RPC_IDEMPOTENT|RPC_ALLOWANON|RPC_AVOIDWORK|RPC_PUBLICFH_OK)
213
214
215 #ifdef VOLATILE_FH_TEST
216 struct ex_vol_rename {
217 nfs_fh4_fmt_t vrn_fh_fmt;
218 struct ex_vol_rename *vrn_next;
219 };
220 #endif /* VOLATILE_FH_TEST */
221
222 /*
223 * An auth cache client entry. This is the umbrella structure and contains all
224 * related auth_cache entries in the authc_tree AVL tree.
225 */
226 struct auth_cache_clnt {
227 avl_node_t authc_link;
228 struct netbuf authc_addr; /* address of the client */
229 krwlock_t authc_lock; /* protects authc_tree */
230 avl_tree_t authc_tree; /* auth_cache entries */
231 };
232
233 /*
234 * An auth cache entry can exist in 6 states.
235 *
236 * A NEW entry was recently allocated and added to the cache. It does not
237 * contain the valid auth state yet.
238 *
239 * A WAITING entry is one which is actively engaging the user land mountd code
240 * to authenticate or re-authenticate it. The auth state might not be valid
241 * yet. The other threads should wait on auth_cv until the retrieving thread
242 * finishes the retrieval and changes the auth cache entry to FRESH, or NEW (in
243 * a case this entry had no valid auth state yet).
244 *
245 * A REFRESHING entry is one which is actively engaging the user land mountd
246 * code to re-authenticate the cache entry. There is currently no other thread
247 * waiting for the results of the refresh.
248 *
249 * A FRESH entry is one which is valid (it is either newly retrieved or has
250 * been refreshed at least once).
251 *
252 * A STALE entry is one which has been detected to be too old. The transition
253 * from FRESH to STALE prevents multiple threads from submitting refresh
254 * requests.
255 *
256 * An INVALID entry is one which was either STALE or REFRESHING and was deleted
257 * out of the encapsulating exi. Since we can't delete it yet, we mark it as
258 * INVALID, which lets the refresh thread know not to work on it and free it
259 * instead.
260 *
261 * Note that the auth state of the entry is valid, even if the entry is STALE.
262 * Just as you can eat stale bread, you can consume a stale cache entry. The
263 * only time the contents change could be during the transition from REFRESHING
264 * or WAITING to FRESH.
265 *
266 * Valid state transitions:
267 *
268 * alloc
269 * |
270 * v
271 * +-----+
272 * +--->| NEW |------>free
273 * | +-----+
274 * | |
275 * | v
276 * | +---------+
277 * +<-| WAITING |
278 * ^ +---------+
279 * | |
280 * | v
281 * | +<--------------------------+<---------------+
282 * | | ^ |
283 * | v | |
284 * | +-------+ +-------+ +------------+ +---------+
285 * +---| FRESH |--->| STALE |--->| REFRESHING |--->| WAITING |
286 * +-------+ +-------+ +------------+ +---------+
287 * | | |
288 * | v |
289 * v +---------+ |
290 * free<-----| INVALID |<--------+
291 * +---------+
292 */
293 typedef enum auth_state {
294 NFS_AUTH_FRESH,
295 NFS_AUTH_STALE,
296 NFS_AUTH_REFRESHING,
297 NFS_AUTH_INVALID,
298 NFS_AUTH_NEW,
299 NFS_AUTH_WAITING
300 } auth_state_t;
301
302 /*
303 * An authorization cache entry
304 *
305 * Either the state in auth_state will protect the
306 * contents or auth_lock must be held.
307 */
308 struct auth_cache {
309 avl_node_t auth_link;
310 struct auth_cache_clnt *auth_clnt;
311 int auth_flavor;
312 cred_t *auth_clnt_cred;
313 uid_t auth_srv_uid;
314 gid_t auth_srv_gid;
315 uint_t auth_srv_ngids;
316 gid_t *auth_srv_gids;
317 int auth_access;
318 time_t auth_time;
319 time_t auth_freshness;
320 auth_state_t auth_state;
321 kmutex_t auth_lock;
322 kcondvar_t auth_cv;
323 };
324
325 #define AUTH_TABLESIZE 32
326
327 /*
328 * Structure containing log file meta-data.
329 */
330 struct log_file {
331 unsigned int lf_flags; /* flags (see below) */
332 int lf_writers; /* outstanding writers */
333 int lf_refcnt; /* references to this struct */
334 caddr_t lf_path; /* buffer file location */
335 vnode_t *lf_vp; /* vnode for the buffer file */
336 kmutex_t lf_lock;
337 kcondvar_t lf_cv_waiters;
338 };
339
340 /*
341 * log_file and log_buffer flags.
342 */
343 #define L_WAITING 0x01 /* flush of in-core data to stable */
344 /* storage in progress */
345 #define L_PRINTED 0x02 /* error message printed to console */
346 #define L_ERROR 0x04 /* error condition detected */
347
348 /*
349 * The logging buffer information.
350 * This structure may be shared by multiple exportinfo structures,
351 * if they share the same buffer file.
352 * This structure contains the basic information about the buffer, such
353 * as it's location in the filesystem.
354 *
355 * 'lb_lock' protects all the fields in this structure except for 'lb_path',
356 * and 'lb_next'.
357 * 'lb_path' is a write-once/read-many field which needs no locking, it is
358 * set before the structure is linked to any exportinfo structure.
359 * 'lb_next' is protected by the log_buffer_list_lock.
360 */
361 struct log_buffer {
362 unsigned int lb_flags; /* L_ONLIST set? */
363 int lb_refcnt; /* references to this struct */
364 unsigned int lb_rec_id; /* used to generate unique id */
365 caddr_t lb_path; /* buffer file pathname */
366 struct log_file *lb_logfile; /* points to log_file structure */
367 kmutex_t lb_lock;
368 struct log_buffer *lb_next;
369 kcondvar_t lb_cv_waiters;
370 caddr_t lb_records; /* linked list of records to write */
371 int lb_num_recs; /* # of records to write */
372 ssize_t lb_size_queued; /* number of bytes queued for write */
373 };
374
375 #define LOG_BUFFER_HOLD(lbp) { \
376 mutex_enter(&(lbp)->lb_lock); \
377 (lbp)->lb_refcnt++; \
378 mutex_exit(&(lbp)->lb_lock); \
379 }
380
381 #define LOG_BUFFER_RELE(lbp) { \
382 log_buffer_rele(lbp); \
383 }
384
385 /*
386 * Structure for character set conversion mapping based on client address.
387 */
388 struct charset_cache {
389 struct charset_cache *next;
390 kiconv_t inbound;
391 kiconv_t outbound;
392 struct sockaddr client_addr;
393 };
394
395 /* Forward declarations */
396 struct exportinfo;
397 struct exp_visible;
398 struct svc_req;
399
400 /*
401 * Treenodes are used to build tree representing every node which is part
402 * of nfs server pseudo namespace. They are connected with both exportinfo
403 * and exp_visible struct. They were introduced to avoid lookup of ".."
404 * in the underlying file system during unshare, which was failing if the
405 * file system was forcibly unmounted or if the directory was removed.
406 * One exp_visible_t can be shared via several treenode_t, i.e.
407 * different tree_vis can point to the same exp_visible_t.
408 * This will happen if some directory is on two different shared paths:
409 * E.g. after share /tmp/a/b1 and share /tmp/a/b2 there will be two treenodes
410 * corresponding to /tmp/a and both will have same value in tree_vis.
411 *
412 *
413 *
414 * NEW DATA STRUCT ORIGINAL DATA STRUCT
415 *
416 * ns_root +---+ +----------+
417 * | / | |PSEUDO EXP|-->+---+ +---+ +---+
418 * +---+--------- ----+----------+ | a |-->| k |-->| b |
419 * /\ +---+ +---+ +---+
420 * / \ . . .
421 * +---+...\......... ..................... . .
422 * *| a | \ +----------+ . .
423 * +---+-----\------- ----|REAL EXP a| . .
424 * / \ +----------+ . .
425 * / +===+... ............................. .
426 * / *| k | +----------+ .
427 * / +===+--- ----|REAL EXP k| .
428 * / +----------+ .
429 * +===+................ .....................................
430 * *| b | +----------+
431 * +===+---------------- ----|REAL EXP b|-->+---+
432 * \ +----------+ | d |
433 * +===+............. ...................+---+
434 * | d | +----------+
435 * +===+------------- ----|PSEUDO EXP|-->+---+ +---+
436 * / +----------+ | e |-->| g |
437 * +---+................. ...................+---+ +---+
438 * | e | .
439 * +---+ .
440 * \ .
441 * +---+.............. ............................
442 * *| g | +----------+
443 * +---+-------------- ----|REAL EXP g|
444 * +----------+
445 *
446 *
447 *
448 * +===+ +---+ +---+
449 * | b |..mountpoint | e |..directory/file *| a |..node is shared
450 * +===+ (VROOT) +---+ +---+
451 *
452 *
453 * Bi-directional interconnect:
454 * treenode_t::tree_exi --------- exportinfo_t::exi_tree
455 * One-way direction connection:
456 * treenode_t::tree_vis .........> exp_visible_t
457 */
458 /* Access to treenode_t is under protection of exported_lock RW_LOCK */
459 typedef struct treenode {
460 /* support for generic n-ary trees */
461 struct treenode *tree_parent;
462 struct treenode *tree_child_first;
463 struct treenode *tree_sibling; /* next sibling */
464 /* private, nfs specific part */
465 struct exportinfo *tree_exi;
466 struct exp_visible *tree_vis;
467 } treenode_t;
468
469 /*
470 * TREE_ROOT checks if the node corresponds to a filesystem root
471 * TREE_EXPORTED checks if the node is explicitly shared
472 */
473
474 #define TREE_ROOT(t) \
475 ((t)->tree_exi && (t)->tree_exi->exi_vp->v_flag & VROOT)
476
477 #define TREE_EXPORTED(t) \
478 ((t)->tree_exi && !PSEUDO((t)->tree_exi))
479
480 /* Root of nfs pseudo namespace */
481 extern treenode_t *ns_root;
482
483 #define EXPTABLESIZE 256
484
485 struct exp_hash {
486 struct exportinfo *prev; /* ptr to the previous exportinfo */
487 struct exportinfo *next; /* ptr to the next exportinfo */
488 struct exportinfo **bckt; /* backpointer to the hash bucket */
489 };
490
491 /*
492 * A node associated with an export entry on the
493 * list of exported filesystems.
494 *
495 * exi_count+exi_lock protects an individual exportinfo from being freed
496 * when in use.
497 *
498 * You must have the writer lock on exported_lock to add/delete an exportinfo
499 * structure to/from the list.
500 *
501 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the
502 * underlying fs devno can change on each mount. When set, the server
503 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must
504 * use exi_fsid because it is guaranteed to be persistent. This isn't
505 * in any way related to NFS4 volatile filehandles.
506 *
507 * The exi_cache_lock protects the exi_cache AVL trees.
508 */
509 struct exportinfo {
510 struct exportdata exi_export;
511 fsid_t exi_fsid;
512 struct fid exi_fid;
513 struct exp_hash fid_hash;
514 struct exp_hash path_hash;
515 struct treenode *exi_tree;
516 fhandle_t exi_fh;
517 krwlock_t exi_cache_lock;
518 kmutex_t exi_lock;
519 uint_t exi_count;
520 vnode_t *exi_vp;
521 vnode_t *exi_dvp;
522 avl_tree_t *exi_cache[AUTH_TABLESIZE];
523 struct log_buffer *exi_logbuffer;
524 struct exp_visible *exi_visible;
525 struct charset_cache *exi_charset;
526 unsigned exi_volatile_dev:1;
527 unsigned exi_moved:1;
528 #ifdef VOLATILE_FH_TEST
529 uint32_t exi_volatile_id;
530 struct ex_vol_rename *exi_vol_rename;
531 kmutex_t exi_vol_rename_lock;
532 #endif /* VOLATILE_FH_TEST */
533 };
534
535 typedef struct exportinfo exportinfo_t;
536 typedef struct exportdata exportdata_t;
537 typedef struct secinfo secinfo_t;
538
539 /*
540 * exp_visible is a visible list per filesystem. It is for filesystems
541 * that may need a limited view of its contents. A pseudo export and
542 * a real export at the mount point (VROOT) which has a subtree shared
543 * has a visible list.
544 *
545 * The exi_visible field is NULL for normal, non-pseudo filesystems
546 * which do not have any subtree exported. If the field is non-null,
547 * it points to a list of visible entries, identified by vis_fid and/or
548 * vis_ino. The presence of a "visible" list means that if this export
549 * can only have a limited view, it can only view the entries in the
550 * exp_visible list. The directories in the fid list comprise paths that
551 * lead to exported directories.
552 *
553 * The vis_count field records the number of paths in this filesystem
554 * that use this directory. The vis_exported field is non-zero if the
555 * entry is an exported directory (leaf node).
556 *
557 * exp_visible itself is not reference counted. Each exp_visible is
558 * referenced twice:
559 * 1) from treenode::tree_vis
560 * 2) linked from exportinfo::exi_visible
561 * The 'owner' of exp_visible is the exportinfo structure. exp_visible should
562 * be always freed only from exportinfo_t, never from treenode::tree_vis.
563 */
564
565 struct exp_visible {
566 vnode_t *vis_vp;
567 fid_t vis_fid;
568 u_longlong_t vis_ino;
569 int vis_count;
570 int vis_exported;
571 struct exp_visible *vis_next;
572 struct secinfo *vis_secinfo;
573 int vis_seccnt;
574 timespec_t vis_change;
575 };
576 typedef struct exp_visible exp_visible_t;
577
578 #define PSEUDO(exi) ((exi)->exi_export.ex_flags & EX_PSEUDO)
579 #define EXP_LINKED(exi) ((exi)->fid_hash.bckt != NULL)
580
581 #define EQFSID(fsidp1, fsidp2) \
582 (((fsidp1)->val[0] == (fsidp2)->val[0]) && \
583 ((fsidp1)->val[1] == (fsidp2)->val[1]))
584
585 #define EQFID(fidp1, fidp2) \
586 ((fidp1)->fid_len == (fidp2)->fid_len && \
587 bcmp((char *)(fidp1)->fid_data, (char *)(fidp2)->fid_data, \
588 (uint_t)(fidp1)->fid_len) == 0)
589
590 #define exportmatch(exi, fsid, fid) \
591 (EQFSID(&(exi)->exi_fsid, (fsid)) && EQFID(&(exi)->exi_fid, (fid)))
592
593 /*
594 * Returns true iff exported filesystem is read-only to the given host.
595 *
596 * Note: this macro should be as fast as possible since it's called
597 * on each NFS modification request.
598 */
599 #define rdonly(ro, vp) ((ro) || vn_is_readonly(vp))
600 #define rdonly4(req, cs) \
601 (vn_is_readonly((cs)->vp) || \
602 (nfsauth4_access((cs)->exi, (cs)->vp, (req), (cs)->basecr, NULL, \
603 NULL, NULL, NULL) & (NFSAUTH_RO | NFSAUTH_LIMITED)))
604
605 extern int nfsauth4_access(struct exportinfo *, vnode_t *,
606 struct svc_req *, cred_t *, uid_t *, gid_t *, uint_t *, gid_t **);
607 extern int nfsauth4_secinfo_access(struct exportinfo *,
608 struct svc_req *, int, int, cred_t *);
609 extern int nfsauth_cache_clnt_compar(const void *, const void *);
610 extern int nfs_fhbcmp(char *, char *, int);
611 extern int nfs_exportinit(void);
612 extern void nfs_exportfini(void);
613 extern int chk_clnt_sec(struct exportinfo *, struct svc_req *);
614 extern int makefh(fhandle_t *, struct vnode *, struct exportinfo *);
615 extern int makefh_ol(fhandle_t *, struct exportinfo *, uint_t);
616 extern int makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *);
617 extern int makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t);
618 extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *);
619 extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *);
620 extern struct exportinfo *checkexport(fsid_t *, struct fid *);
621 extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *);
622 extern void exi_hold(struct exportinfo *);
623 extern void exi_rele(struct exportinfo *);
624 extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *,
625 int *, bool_t);
626 extern int nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *,
627 struct exportinfo **);
628 extern void export_link(struct exportinfo *);
629 extern void export_unlink(struct exportinfo *);
630 extern vnode_t *untraverse(vnode_t *);
631 extern int vn_is_nfs_reparse(vnode_t *, cred_t *);
632 extern int client_is_downrev(struct svc_req *);
633 extern char *build_symlink(vnode_t *, cred_t *, size_t *);
634
635 /*
636 * Functions that handle the NFSv4 server namespace
637 */
638 extern exportinfo_t *vis2exi(treenode_t *);
639 extern int treeclimb_export(struct exportinfo *);
640 extern void treeclimb_unexport(struct exportinfo *);
641 extern int nfs_visible(struct exportinfo *, vnode_t *, int *);
642 extern int nfs_visible_inode(struct exportinfo *, ino64_t,
643 struct exp_visible **);
644 extern int has_visible(struct exportinfo *, vnode_t *);
645 extern void free_visible(struct exp_visible *);
646 extern int nfs_exported(struct exportinfo *, vnode_t *);
647 extern struct exportinfo *pseudo_exportfs(vnode_t *, fid_t *,
648 struct exp_visible *, struct exportdata *);
649 extern int vop_fid_pseudo(vnode_t *, fid_t *);
650 extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *);
651 extern bool_t nfs_visible_change(struct exportinfo *, vnode_t *,
652 timespec_t *);
653 extern void tree_update_change(treenode_t *, timespec_t *);
654 /*
655 * Functions that handle the NFSv4 server namespace security flavors
656 * information.
657 */
658 extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *);
659 extern void srv_secinfo_list_free(struct secinfo *, int);
660
661 /*
662 * "public" and default (root) location for public filehandle
663 */
664 extern struct exportinfo *exi_public, *exi_root;
665 extern fhandle_t nullfh2; /* for comparing V2 filehandles */
666 extern krwlock_t exported_lock;
667 extern struct exportinfo *exptable[];
668
669 /*
670 * Two macros for identifying public filehandles.
671 * A v2 public filehandle is 32 zero bytes.
672 * A v3 public filehandle is zero length.
673 */
674 #define PUBLIC_FH2(fh) \
675 ((fh)->fh_fsid.val[1] == 0 && \
676 bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0)
677
678 #define PUBLIC_FH3(fh) \
679 ((fh)->fh3_length == 0)
680
681 extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *);
682 extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *);
683
684 #endif /* _KERNEL */
685
686 #ifdef __cplusplus
687 }
688 #endif
689
690 #endif /* _NFS_EXPORT_H */