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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved.
25 * Portions Copyright 2011 Martin Matuska
26 * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved.
27 * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
28 * Copyright (c) 2014, 2016 Joyent, Inc. All rights reserved.
29 * Copyright (c) 2011, 2017 by Delphix. All rights reserved.
30 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
31 * Copyright (c) 2013 Steven Hartland. All rights reserved.
32 * Copyright (c) 2014 Integros [integros.com]
33 * Copyright 2016 Toomas Soome <tsoome@me.com>
34 * Copyright 2017 RackTop Systems.
35 * Copyright (c) 2017 Datto Inc.
36 */
37
38 /*
39 * ZFS ioctls.
40 *
41 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
42 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
43 *
44 * There are two ways that we handle ioctls: the legacy way where almost
45 * all of the logic is in the ioctl callback, and the new way where most
46 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
47 *
48 * Non-legacy ioctls should be registered by calling
49 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
50 * from userland by lzc_ioctl().
51 *
52 * The registration arguments are as follows:
53 *
54 * const char *name
55 * The name of the ioctl. This is used for history logging. If the
56 * ioctl returns successfully (the callback returns 0), and allow_log
57 * is true, then a history log entry will be recorded with the input &
58 * output nvlists. The log entry can be printed with "zpool history -i".
59 *
60 * zfs_ioc_t ioc
61 * The ioctl request number, which userland will pass to ioctl(2).
62 * The ioctl numbers can change from release to release, because
63 * the caller (libzfs) must be matched to the kernel.
64 *
65 * zfs_secpolicy_func_t *secpolicy
66 * This function will be called before the zfs_ioc_func_t, to
67 * determine if this operation is permitted. It should return EPERM
68 * on failure, and 0 on success. Checks include determining if the
69 * dataset is visible in this zone, and if the user has either all
70 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
71 * to do this operation on this dataset with "zfs allow".
72 *
73 * zfs_ioc_namecheck_t namecheck
74 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
75 * name, a dataset name, or nothing. If the name is not well-formed,
76 * the ioctl will fail and the callback will not be called.
77 * Therefore, the callback can assume that the name is well-formed
78 * (e.g. is null-terminated, doesn't have more than one '@' character,
79 * doesn't have invalid characters).
80 *
81 * zfs_ioc_poolcheck_t pool_check
82 * This specifies requirements on the pool state. If the pool does
83 * not meet them (is suspended or is readonly), the ioctl will fail
84 * and the callback will not be called. If any checks are specified
85 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
86 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
87 * POOL_CHECK_READONLY).
88 *
89 * boolean_t smush_outnvlist
90 * If smush_outnvlist is true, then the output is presumed to be a
91 * list of errors, and it will be "smushed" down to fit into the
92 * caller's buffer, by removing some entries and replacing them with a
93 * single "N_MORE_ERRORS" entry indicating how many were removed. See
94 * nvlist_smush() for details. If smush_outnvlist is false, and the
95 * outnvlist does not fit into the userland-provided buffer, then the
96 * ioctl will fail with ENOMEM.
97 *
98 * zfs_ioc_func_t *func
99 * The callback function that will perform the operation.
100 *
101 * The callback should return 0 on success, or an error number on
102 * failure. If the function fails, the userland ioctl will return -1,
103 * and errno will be set to the callback's return value. The callback
104 * will be called with the following arguments:
105 *
106 * const char *name
107 * The name of the pool or dataset to operate on, from
108 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
109 * expected type (pool, dataset, or none).
110 *
111 * nvlist_t *innvl
112 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
113 * NULL if no input nvlist was provided. Changes to this nvlist are
114 * ignored. If the input nvlist could not be deserialized, the
115 * ioctl will fail and the callback will not be called.
116 *
117 * nvlist_t *outnvl
118 * The output nvlist, initially empty. The callback can fill it in,
119 * and it will be returned to userland by serializing it into
120 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
121 * fails (e.g. because the caller didn't supply a large enough
122 * buffer), then the overall ioctl will fail. See the
123 * 'smush_nvlist' argument above for additional behaviors.
124 *
125 * There are two typical uses of the output nvlist:
126 * - To return state, e.g. property values. In this case,
127 * smush_outnvlist should be false. If the buffer was not large
128 * enough, the caller will reallocate a larger buffer and try
129 * the ioctl again.
130 *
131 * - To return multiple errors from an ioctl which makes on-disk
132 * changes. In this case, smush_outnvlist should be true.
133 * Ioctls which make on-disk modifications should generally not
134 * use the outnvl if they succeed, because the caller can not
135 * distinguish between the operation failing, and
136 * deserialization failing.
137 */
138
139 #include <sys/types.h>
140 #include <sys/param.h>
141 #include <sys/errno.h>
142 #include <sys/uio.h>
143 #include <sys/buf.h>
144 #include <sys/modctl.h>
145 #include <sys/open.h>
146 #include <sys/file.h>
147 #include <sys/kmem.h>
148 #include <sys/conf.h>
149 #include <sys/cmn_err.h>
150 #include <sys/stat.h>
151 #include <sys/zfs_ioctl.h>
152 #include <sys/zfs_vfsops.h>
153 #include <sys/zfs_znode.h>
154 #include <sys/zap.h>
155 #include <sys/spa.h>
156 #include <sys/spa_impl.h>
157 #include <sys/vdev.h>
158 #include <sys/priv_impl.h>
159 #include <sys/dmu.h>
160 #include <sys/dsl_dir.h>
161 #include <sys/dsl_dataset.h>
162 #include <sys/dsl_prop.h>
163 #include <sys/dsl_deleg.h>
164 #include <sys/dmu_objset.h>
165 #include <sys/dmu_impl.h>
166 #include <sys/dmu_tx.h>
167 #include <sys/ddi.h>
168 #include <sys/sunddi.h>
169 #include <sys/sunldi.h>
170 #include <sys/policy.h>
171 #include <sys/zone.h>
172 #include <sys/nvpair.h>
173 #include <sys/pathname.h>
174 #include <sys/mount.h>
175 #include <sys/sdt.h>
176 #include <sys/fs/zfs.h>
177 #include <sys/zfs_ctldir.h>
178 #include <sys/zfs_dir.h>
179 #include <sys/zfs_onexit.h>
180 #include <sys/zvol.h>
181 #include <sys/dsl_scan.h>
182 #include <sharefs/share.h>
183 #include <sys/dmu_objset.h>
184 #include <sys/dmu_send.h>
185 #include <sys/dsl_destroy.h>
186 #include <sys/dsl_bookmark.h>
187 #include <sys/dsl_userhold.h>
188 #include <sys/zfeature.h>
189 #include <sys/zcp.h>
190 #include <sys/zio_checksum.h>
191 #include <sys/vdev_removal.h>
192
193 #include "zfs_namecheck.h"
194 #include "zfs_prop.h"
195 #include "zfs_deleg.h"
196 #include "zfs_comutil.h"
197
198 #include "lua.h"
199 #include "lauxlib.h"
200
201 extern struct modlfs zfs_modlfs;
202
203 extern void zfs_init(void);
204 extern void zfs_fini(void);
205
206 ldi_ident_t zfs_li = NULL;
207 dev_info_t *zfs_dip;
208
209 uint_t zfs_fsyncer_key;
210 extern uint_t rrw_tsd_key;
211 static uint_t zfs_allow_log_key;
212
213 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
214 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
215 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
216
217 typedef enum {
218 NO_NAME,
219 POOL_NAME,
220 DATASET_NAME
221 } zfs_ioc_namecheck_t;
222
223 typedef enum {
224 POOL_CHECK_NONE = 1 << 0,
225 POOL_CHECK_SUSPENDED = 1 << 1,
226 POOL_CHECK_READONLY = 1 << 2,
227 } zfs_ioc_poolcheck_t;
228
229 typedef struct zfs_ioc_vec {
230 zfs_ioc_legacy_func_t *zvec_legacy_func;
231 zfs_ioc_func_t *zvec_func;
232 zfs_secpolicy_func_t *zvec_secpolicy;
233 zfs_ioc_namecheck_t zvec_namecheck;
234 boolean_t zvec_allow_log;
235 zfs_ioc_poolcheck_t zvec_pool_check;
236 boolean_t zvec_smush_outnvlist;
237 const char *zvec_name;
238 } zfs_ioc_vec_t;
239
240 /* This array is indexed by zfs_userquota_prop_t */
241 static const char *userquota_perms[] = {
242 ZFS_DELEG_PERM_USERUSED,
243 ZFS_DELEG_PERM_USERQUOTA,
244 ZFS_DELEG_PERM_GROUPUSED,
245 ZFS_DELEG_PERM_GROUPQUOTA,
246 };
247
248 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
249 static int zfs_check_settable(const char *name, nvpair_t *property,
250 cred_t *cr);
251 static int zfs_check_clearable(char *dataset, nvlist_t *props,
252 nvlist_t **errors);
253 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
254 boolean_t *);
255 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
256 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
257
258 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature);
259
260 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
261 void
262 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
263 {
264 const char *newfile;
265 char buf[512];
266 va_list adx;
267
268 /*
269 * Get rid of annoying "../common/" prefix to filename.
270 */
271 newfile = strrchr(file, '/');
272 if (newfile != NULL) {
273 newfile = newfile + 1; /* Get rid of leading / */
274 } else {
275 newfile = file;
276 }
277
278 va_start(adx, fmt);
279 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
280 va_end(adx);
281
282 /*
283 * To get this data, use the zfs-dprintf probe as so:
284 * dtrace -q -n 'zfs-dprintf \
285 * /stringof(arg0) == "dbuf.c"/ \
286 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
287 * arg0 = file name
288 * arg1 = function name
289 * arg2 = line number
290 * arg3 = message
291 */
292 DTRACE_PROBE4(zfs__dprintf,
293 char *, newfile, char *, func, int, line, char *, buf);
294 }
295
296 static void
297 history_str_free(char *buf)
298 {
299 kmem_free(buf, HIS_MAX_RECORD_LEN);
300 }
301
302 static char *
303 history_str_get(zfs_cmd_t *zc)
304 {
305 char *buf;
306
307 if (zc->zc_history == NULL)
308 return (NULL);
309
310 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
311 if (copyinstr((void *)(uintptr_t)zc->zc_history,
312 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
313 history_str_free(buf);
314 return (NULL);
315 }
316
317 buf[HIS_MAX_RECORD_LEN -1] = '\0';
318
319 return (buf);
320 }
321
322 /*
323 * Check to see if the named dataset is currently defined as bootable
324 */
325 static boolean_t
326 zfs_is_bootfs(const char *name)
327 {
328 objset_t *os;
329
330 if (dmu_objset_hold(name, FTAG, &os) == 0) {
331 boolean_t ret;
332 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
333 dmu_objset_rele(os, FTAG);
334 return (ret);
335 }
336 return (B_FALSE);
337 }
338
339 /*
340 * Return non-zero if the spa version is less than requested version.
341 */
342 static int
343 zfs_earlier_version(const char *name, int version)
344 {
345 spa_t *spa;
346
347 if (spa_open(name, &spa, FTAG) == 0) {
348 if (spa_version(spa) < version) {
349 spa_close(spa, FTAG);
350 return (1);
351 }
352 spa_close(spa, FTAG);
353 }
354 return (0);
355 }
356
357 /*
358 * Return TRUE if the ZPL version is less than requested version.
359 */
360 static boolean_t
361 zpl_earlier_version(const char *name, int version)
362 {
363 objset_t *os;
364 boolean_t rc = B_TRUE;
365
366 if (dmu_objset_hold(name, FTAG, &os) == 0) {
367 uint64_t zplversion;
368
369 if (dmu_objset_type(os) != DMU_OST_ZFS) {
370 dmu_objset_rele(os, FTAG);
371 return (B_TRUE);
372 }
373 /* XXX reading from non-owned objset */
374 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
375 rc = zplversion < version;
376 dmu_objset_rele(os, FTAG);
377 }
378 return (rc);
379 }
380
381 static void
382 zfs_log_history(zfs_cmd_t *zc)
383 {
384 spa_t *spa;
385 char *buf;
386
387 if ((buf = history_str_get(zc)) == NULL)
388 return;
389
390 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
391 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
392 (void) spa_history_log(spa, buf);
393 spa_close(spa, FTAG);
394 }
395 history_str_free(buf);
396 }
397
398 /*
399 * Policy for top-level read operations (list pools). Requires no privileges,
400 * and can be used in the local zone, as there is no associated dataset.
401 */
402 /* ARGSUSED */
403 static int
404 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
405 {
406 return (0);
407 }
408
409 /*
410 * Policy for dataset read operations (list children, get statistics). Requires
411 * no privileges, but must be visible in the local zone.
412 */
413 /* ARGSUSED */
414 static int
415 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
416 {
417 if (INGLOBALZONE(curproc) ||
418 zone_dataset_visible(zc->zc_name, NULL))
419 return (0);
420
421 return (SET_ERROR(ENOENT));
422 }
423
424 static int
425 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
426 {
427 int writable = 1;
428
429 /*
430 * The dataset must be visible by this zone -- check this first
431 * so they don't see EPERM on something they shouldn't know about.
432 */
433 if (!INGLOBALZONE(curproc) &&
434 !zone_dataset_visible(dataset, &writable))
435 return (SET_ERROR(ENOENT));
436
437 if (INGLOBALZONE(curproc)) {
438 /*
439 * If the fs is zoned, only root can access it from the
440 * global zone.
441 */
442 if (secpolicy_zfs(cr) && zoned)
443 return (SET_ERROR(EPERM));
444 } else {
445 /*
446 * If we are in a local zone, the 'zoned' property must be set.
447 */
448 if (!zoned)
449 return (SET_ERROR(EPERM));
450
451 /* must be writable by this zone */
452 if (!writable)
453 return (SET_ERROR(EPERM));
454 }
455 return (0);
456 }
457
458 static int
459 zfs_dozonecheck(const char *dataset, cred_t *cr)
460 {
461 uint64_t zoned;
462
463 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
464 return (SET_ERROR(ENOENT));
465
466 return (zfs_dozonecheck_impl(dataset, zoned, cr));
467 }
468
469 static int
470 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
471 {
472 uint64_t zoned;
473
474 if (dsl_prop_get_int_ds(ds, "zoned", &zoned))
475 return (SET_ERROR(ENOENT));
476
477 return (zfs_dozonecheck_impl(dataset, zoned, cr));
478 }
479
480 static int
481 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
482 const char *perm, cred_t *cr)
483 {
484 int error;
485
486 error = zfs_dozonecheck_ds(name, ds, cr);
487 if (error == 0) {
488 error = secpolicy_zfs(cr);
489 if (error != 0)
490 error = dsl_deleg_access_impl(ds, perm, cr);
491 }
492 return (error);
493 }
494
495 static int
496 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
497 {
498 int error;
499 dsl_dataset_t *ds;
500 dsl_pool_t *dp;
501
502 /*
503 * First do a quick check for root in the global zone, which
504 * is allowed to do all write_perms. This ensures that zfs_ioc_*
505 * will get to handle nonexistent datasets.
506 */
507 if (INGLOBALZONE(curproc) && secpolicy_zfs(cr) == 0)
508 return (0);
509
510 error = dsl_pool_hold(name, FTAG, &dp);
511 if (error != 0)
512 return (error);
513
514 error = dsl_dataset_hold(dp, name, FTAG, &ds);
515 if (error != 0) {
516 dsl_pool_rele(dp, FTAG);
517 return (error);
518 }
519
520 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr);
521
522 dsl_dataset_rele(ds, FTAG);
523 dsl_pool_rele(dp, FTAG);
524 return (error);
525 }
526
527 /*
528 * Policy for setting the security label property.
529 *
530 * Returns 0 for success, non-zero for access and other errors.
531 */
532 static int
533 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
534 {
535 char ds_hexsl[MAXNAMELEN];
536 bslabel_t ds_sl, new_sl;
537 boolean_t new_default = FALSE;
538 uint64_t zoned;
539 int needed_priv = -1;
540 int error;
541
542 /* First get the existing dataset label. */
543 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
544 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
545 if (error != 0)
546 return (SET_ERROR(EPERM));
547
548 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
549 new_default = TRUE;
550
551 /* The label must be translatable */
552 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
553 return (SET_ERROR(EINVAL));
554
555 /*
556 * In a non-global zone, disallow attempts to set a label that
557 * doesn't match that of the zone; otherwise no other checks
558 * are needed.
559 */
560 if (!INGLOBALZONE(curproc)) {
561 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
562 return (SET_ERROR(EPERM));
563 return (0);
564 }
565
566 /*
567 * For global-zone datasets (i.e., those whose zoned property is
568 * "off", verify that the specified new label is valid for the
569 * global zone.
570 */
571 if (dsl_prop_get_integer(name,
572 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
573 return (SET_ERROR(EPERM));
574 if (!zoned) {
575 if (zfs_check_global_label(name, strval) != 0)
576 return (SET_ERROR(EPERM));
577 }
578
579 /*
580 * If the existing dataset label is nondefault, check if the
581 * dataset is mounted (label cannot be changed while mounted).
582 * Get the zfsvfs; if there isn't one, then the dataset isn't
583 * mounted (or isn't a dataset, doesn't exist, ...).
584 */
585 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
586 objset_t *os;
587 static char *setsl_tag = "setsl_tag";
588
589 /*
590 * Try to own the dataset; abort if there is any error,
591 * (e.g., already mounted, in use, or other error).
592 */
593 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
594 setsl_tag, &os);
595 if (error != 0)
596 return (SET_ERROR(EPERM));
597
598 dmu_objset_disown(os, setsl_tag);
599
600 if (new_default) {
601 needed_priv = PRIV_FILE_DOWNGRADE_SL;
602 goto out_check;
603 }
604
605 if (hexstr_to_label(strval, &new_sl) != 0)
606 return (SET_ERROR(EPERM));
607
608 if (blstrictdom(&ds_sl, &new_sl))
609 needed_priv = PRIV_FILE_DOWNGRADE_SL;
610 else if (blstrictdom(&new_sl, &ds_sl))
611 needed_priv = PRIV_FILE_UPGRADE_SL;
612 } else {
613 /* dataset currently has a default label */
614 if (!new_default)
615 needed_priv = PRIV_FILE_UPGRADE_SL;
616 }
617
618 out_check:
619 if (needed_priv != -1)
620 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
621 return (0);
622 }
623
624 static int
625 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
626 cred_t *cr)
627 {
628 char *strval;
629
630 /*
631 * Check permissions for special properties.
632 */
633 switch (prop) {
634 case ZFS_PROP_ZONED:
635 /*
636 * Disallow setting of 'zoned' from within a local zone.
637 */
638 if (!INGLOBALZONE(curproc))
639 return (SET_ERROR(EPERM));
640 break;
641
642 case ZFS_PROP_QUOTA:
643 case ZFS_PROP_FILESYSTEM_LIMIT:
644 case ZFS_PROP_SNAPSHOT_LIMIT:
645 if (!INGLOBALZONE(curproc)) {
646 uint64_t zoned;
647 char setpoint[ZFS_MAX_DATASET_NAME_LEN];
648 /*
649 * Unprivileged users are allowed to modify the
650 * limit on things *under* (ie. contained by)
651 * the thing they own.
652 */
653 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
654 setpoint))
655 return (SET_ERROR(EPERM));
656 if (!zoned || strlen(dsname) <= strlen(setpoint))
657 return (SET_ERROR(EPERM));
658 }
659 break;
660
661 case ZFS_PROP_MLSLABEL:
662 if (!is_system_labeled())
663 return (SET_ERROR(EPERM));
664
665 if (nvpair_value_string(propval, &strval) == 0) {
666 int err;
667
668 err = zfs_set_slabel_policy(dsname, strval, CRED());
669 if (err != 0)
670 return (err);
671 }
672 break;
673 }
674
675 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
676 }
677
678 /* ARGSUSED */
679 static int
680 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
681 {
682 int error;
683
684 error = zfs_dozonecheck(zc->zc_name, cr);
685 if (error != 0)
686 return (error);
687
688 /*
689 * permission to set permissions will be evaluated later in
690 * dsl_deleg_can_allow()
691 */
692 return (0);
693 }
694
695 /* ARGSUSED */
696 static int
697 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
698 {
699 return (zfs_secpolicy_write_perms(zc->zc_name,
700 ZFS_DELEG_PERM_ROLLBACK, cr));
701 }
702
703 /* ARGSUSED */
704 static int
705 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
706 {
707 dsl_pool_t *dp;
708 dsl_dataset_t *ds;
709 char *cp;
710 int error;
711
712 /*
713 * Generate the current snapshot name from the given objsetid, then
714 * use that name for the secpolicy/zone checks.
715 */
716 cp = strchr(zc->zc_name, '@');
717 if (cp == NULL)
718 return (SET_ERROR(EINVAL));
719 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
720 if (error != 0)
721 return (error);
722
723 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
724 if (error != 0) {
725 dsl_pool_rele(dp, FTAG);
726 return (error);
727 }
728
729 dsl_dataset_name(ds, zc->zc_name);
730
731 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
732 ZFS_DELEG_PERM_SEND, cr);
733 dsl_dataset_rele(ds, FTAG);
734 dsl_pool_rele(dp, FTAG);
735
736 return (error);
737 }
738
739 /* ARGSUSED */
740 static int
741 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
742 {
743 return (zfs_secpolicy_write_perms(zc->zc_name,
744 ZFS_DELEG_PERM_SEND, cr));
745 }
746
747 /* ARGSUSED */
748 static int
749 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
750 {
751 vnode_t *vp;
752 int error;
753
754 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
755 NO_FOLLOW, NULL, &vp)) != 0)
756 return (error);
757
758 /* Now make sure mntpnt and dataset are ZFS */
759
760 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
761 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
762 zc->zc_name) != 0)) {
763 VN_RELE(vp);
764 return (SET_ERROR(EPERM));
765 }
766
767 VN_RELE(vp);
768 return (dsl_deleg_access(zc->zc_name,
769 ZFS_DELEG_PERM_SHARE, cr));
770 }
771
772 int
773 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
774 {
775 if (!INGLOBALZONE(curproc))
776 return (SET_ERROR(EPERM));
777
778 if (secpolicy_nfs(cr) == 0) {
779 return (0);
780 } else {
781 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
782 }
783 }
784
785 int
786 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
787 {
788 if (!INGLOBALZONE(curproc))
789 return (SET_ERROR(EPERM));
790
791 if (secpolicy_smb(cr) == 0) {
792 return (0);
793 } else {
794 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
795 }
796 }
797
798 static int
799 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
800 {
801 char *cp;
802
803 /*
804 * Remove the @bla or /bla from the end of the name to get the parent.
805 */
806 (void) strncpy(parent, datasetname, parentsize);
807 cp = strrchr(parent, '@');
808 if (cp != NULL) {
809 cp[0] = '\0';
810 } else {
811 cp = strrchr(parent, '/');
812 if (cp == NULL)
813 return (SET_ERROR(ENOENT));
814 cp[0] = '\0';
815 }
816
817 return (0);
818 }
819
820 int
821 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
822 {
823 int error;
824
825 if ((error = zfs_secpolicy_write_perms(name,
826 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
827 return (error);
828
829 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
830 }
831
832 /* ARGSUSED */
833 static int
834 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
835 {
836 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
837 }
838
839 /*
840 * Destroying snapshots with delegated permissions requires
841 * descendant mount and destroy permissions.
842 */
843 /* ARGSUSED */
844 static int
845 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
846 {
847 nvlist_t *snaps;
848 nvpair_t *pair, *nextpair;
849 int error = 0;
850
851 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
852 return (SET_ERROR(EINVAL));
853 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
854 pair = nextpair) {
855 nextpair = nvlist_next_nvpair(snaps, pair);
856 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr);
857 if (error == ENOENT) {
858 /*
859 * Ignore any snapshots that don't exist (we consider
860 * them "already destroyed"). Remove the name from the
861 * nvl here in case the snapshot is created between
862 * now and when we try to destroy it (in which case
863 * we don't want to destroy it since we haven't
864 * checked for permission).
865 */
866 fnvlist_remove_nvpair(snaps, pair);
867 error = 0;
868 }
869 if (error != 0)
870 break;
871 }
872
873 return (error);
874 }
875
876 int
877 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
878 {
879 char parentname[ZFS_MAX_DATASET_NAME_LEN];
880 int error;
881
882 if ((error = zfs_secpolicy_write_perms(from,
883 ZFS_DELEG_PERM_RENAME, cr)) != 0)
884 return (error);
885
886 if ((error = zfs_secpolicy_write_perms(from,
887 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
888 return (error);
889
890 if ((error = zfs_get_parent(to, parentname,
891 sizeof (parentname))) != 0)
892 return (error);
893
894 if ((error = zfs_secpolicy_write_perms(parentname,
895 ZFS_DELEG_PERM_CREATE, cr)) != 0)
896 return (error);
897
898 if ((error = zfs_secpolicy_write_perms(parentname,
899 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
900 return (error);
901
902 return (error);
903 }
904
905 /* ARGSUSED */
906 static int
907 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
908 {
909 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
910 }
911
912 /* ARGSUSED */
913 static int
914 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
915 {
916 dsl_pool_t *dp;
917 dsl_dataset_t *clone;
918 int error;
919
920 error = zfs_secpolicy_write_perms(zc->zc_name,
921 ZFS_DELEG_PERM_PROMOTE, cr);
922 if (error != 0)
923 return (error);
924
925 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
926 if (error != 0)
927 return (error);
928
929 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
930
931 if (error == 0) {
932 char parentname[ZFS_MAX_DATASET_NAME_LEN];
933 dsl_dataset_t *origin = NULL;
934 dsl_dir_t *dd;
935 dd = clone->ds_dir;
936
937 error = dsl_dataset_hold_obj(dd->dd_pool,
938 dsl_dir_phys(dd)->dd_origin_obj, FTAG, &origin);
939 if (error != 0) {
940 dsl_dataset_rele(clone, FTAG);
941 dsl_pool_rele(dp, FTAG);
942 return (error);
943 }
944
945 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
946 ZFS_DELEG_PERM_MOUNT, cr);
947
948 dsl_dataset_name(origin, parentname);
949 if (error == 0) {
950 error = zfs_secpolicy_write_perms_ds(parentname, origin,
951 ZFS_DELEG_PERM_PROMOTE, cr);
952 }
953 dsl_dataset_rele(clone, FTAG);
954 dsl_dataset_rele(origin, FTAG);
955 }
956 dsl_pool_rele(dp, FTAG);
957 return (error);
958 }
959
960 /* ARGSUSED */
961 static int
962 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
963 {
964 int error;
965
966 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
967 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
968 return (error);
969
970 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
971 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
972 return (error);
973
974 return (zfs_secpolicy_write_perms(zc->zc_name,
975 ZFS_DELEG_PERM_CREATE, cr));
976 }
977
978 int
979 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
980 {
981 return (zfs_secpolicy_write_perms(name,
982 ZFS_DELEG_PERM_SNAPSHOT, cr));
983 }
984
985 /*
986 * Check for permission to create each snapshot in the nvlist.
987 */
988 /* ARGSUSED */
989 static int
990 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
991 {
992 nvlist_t *snaps;
993 int error = 0;
994 nvpair_t *pair;
995
996 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
997 return (SET_ERROR(EINVAL));
998 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
999 pair = nvlist_next_nvpair(snaps, pair)) {
1000 char *name = nvpair_name(pair);
1001 char *atp = strchr(name, '@');
1002
1003 if (atp == NULL) {
1004 error = SET_ERROR(EINVAL);
1005 break;
1006 }
1007 *atp = '\0';
1008 error = zfs_secpolicy_snapshot_perms(name, cr);
1009 *atp = '@';
1010 if (error != 0)
1011 break;
1012 }
1013 return (error);
1014 }
1015
1016 /*
1017 * Check for permission to create each snapshot in the nvlist.
1018 */
1019 /* ARGSUSED */
1020 static int
1021 zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1022 {
1023 int error = 0;
1024
1025 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
1026 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
1027 char *name = nvpair_name(pair);
1028 char *hashp = strchr(name, '#');
1029
1030 if (hashp == NULL) {
1031 error = SET_ERROR(EINVAL);
1032 break;
1033 }
1034 *hashp = '\0';
1035 error = zfs_secpolicy_write_perms(name,
1036 ZFS_DELEG_PERM_BOOKMARK, cr);
1037 *hashp = '#';
1038 if (error != 0)
1039 break;
1040 }
1041 return (error);
1042 }
1043
1044 /* ARGSUSED */
1045 static int
1046 zfs_secpolicy_remap(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1047 {
1048 return (zfs_secpolicy_write_perms(zc->zc_name,
1049 ZFS_DELEG_PERM_REMAP, cr));
1050 }
1051
1052 /* ARGSUSED */
1053 static int
1054 zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1055 {
1056 nvpair_t *pair, *nextpair;
1057 int error = 0;
1058
1059 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1060 pair = nextpair) {
1061 char *name = nvpair_name(pair);
1062 char *hashp = strchr(name, '#');
1063 nextpair = nvlist_next_nvpair(innvl, pair);
1064
1065 if (hashp == NULL) {
1066 error = SET_ERROR(EINVAL);
1067 break;
1068 }
1069
1070 *hashp = '\0';
1071 error = zfs_secpolicy_write_perms(name,
1072 ZFS_DELEG_PERM_DESTROY, cr);
1073 *hashp = '#';
1074 if (error == ENOENT) {
1075 /*
1076 * Ignore any filesystems that don't exist (we consider
1077 * their bookmarks "already destroyed"). Remove
1078 * the name from the nvl here in case the filesystem
1079 * is created between now and when we try to destroy
1080 * the bookmark (in which case we don't want to
1081 * destroy it since we haven't checked for permission).
1082 */
1083 fnvlist_remove_nvpair(innvl, pair);
1084 error = 0;
1085 }
1086 if (error != 0)
1087 break;
1088 }
1089
1090 return (error);
1091 }
1092
1093 /* ARGSUSED */
1094 static int
1095 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1096 {
1097 /*
1098 * Even root must have a proper TSD so that we know what pool
1099 * to log to.
1100 */
1101 if (tsd_get(zfs_allow_log_key) == NULL)
1102 return (SET_ERROR(EPERM));
1103 return (0);
1104 }
1105
1106 static int
1107 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1108 {
1109 char parentname[ZFS_MAX_DATASET_NAME_LEN];
1110 int error;
1111 char *origin;
1112
1113 if ((error = zfs_get_parent(zc->zc_name, parentname,
1114 sizeof (parentname))) != 0)
1115 return (error);
1116
1117 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1118 (error = zfs_secpolicy_write_perms(origin,
1119 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1120 return (error);
1121
1122 if ((error = zfs_secpolicy_write_perms(parentname,
1123 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1124 return (error);
1125
1126 return (zfs_secpolicy_write_perms(parentname,
1127 ZFS_DELEG_PERM_MOUNT, cr));
1128 }
1129
1130 /*
1131 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1132 * SYS_CONFIG privilege, which is not available in a local zone.
1133 */
1134 /* ARGSUSED */
1135 static int
1136 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1137 {
1138 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1139 return (SET_ERROR(EPERM));
1140
1141 return (0);
1142 }
1143
1144 /*
1145 * Policy for object to name lookups.
1146 */
1147 /* ARGSUSED */
1148 static int
1149 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1150 {
1151 int error;
1152
1153 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1154 return (0);
1155
1156 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1157 return (error);
1158 }
1159
1160 /*
1161 * Policy for fault injection. Requires all privileges.
1162 */
1163 /* ARGSUSED */
1164 static int
1165 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1166 {
1167 return (secpolicy_zinject(cr));
1168 }
1169
1170 /* ARGSUSED */
1171 static int
1172 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1173 {
1174 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1175
1176 if (prop == ZPROP_INVAL) {
1177 if (!zfs_prop_user(zc->zc_value))
1178 return (SET_ERROR(EINVAL));
1179 return (zfs_secpolicy_write_perms(zc->zc_name,
1180 ZFS_DELEG_PERM_USERPROP, cr));
1181 } else {
1182 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1183 NULL, cr));
1184 }
1185 }
1186
1187 static int
1188 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1189 {
1190 int err = zfs_secpolicy_read(zc, innvl, cr);
1191 if (err)
1192 return (err);
1193
1194 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1195 return (SET_ERROR(EINVAL));
1196
1197 if (zc->zc_value[0] == 0) {
1198 /*
1199 * They are asking about a posix uid/gid. If it's
1200 * themself, allow it.
1201 */
1202 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1203 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1204 if (zc->zc_guid == crgetuid(cr))
1205 return (0);
1206 } else {
1207 if (groupmember(zc->zc_guid, cr))
1208 return (0);
1209 }
1210 }
1211
1212 return (zfs_secpolicy_write_perms(zc->zc_name,
1213 userquota_perms[zc->zc_objset_type], cr));
1214 }
1215
1216 static int
1217 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1218 {
1219 int err = zfs_secpolicy_read(zc, innvl, cr);
1220 if (err)
1221 return (err);
1222
1223 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1224 return (SET_ERROR(EINVAL));
1225
1226 return (zfs_secpolicy_write_perms(zc->zc_name,
1227 userquota_perms[zc->zc_objset_type], cr));
1228 }
1229
1230 /* ARGSUSED */
1231 static int
1232 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1233 {
1234 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1235 NULL, cr));
1236 }
1237
1238 /* ARGSUSED */
1239 static int
1240 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1241 {
1242 nvpair_t *pair;
1243 nvlist_t *holds;
1244 int error;
1245
1246 error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1247 if (error != 0)
1248 return (SET_ERROR(EINVAL));
1249
1250 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1251 pair = nvlist_next_nvpair(holds, pair)) {
1252 char fsname[ZFS_MAX_DATASET_NAME_LEN];
1253 error = dmu_fsname(nvpair_name(pair), fsname);
1254 if (error != 0)
1255 return (error);
1256 error = zfs_secpolicy_write_perms(fsname,
1257 ZFS_DELEG_PERM_HOLD, cr);
1258 if (error != 0)
1259 return (error);
1260 }
1261 return (0);
1262 }
1263
1264 /* ARGSUSED */
1265 static int
1266 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1267 {
1268 nvpair_t *pair;
1269 int error;
1270
1271 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1272 pair = nvlist_next_nvpair(innvl, pair)) {
1273 char fsname[ZFS_MAX_DATASET_NAME_LEN];
1274 error = dmu_fsname(nvpair_name(pair), fsname);
1275 if (error != 0)
1276 return (error);
1277 error = zfs_secpolicy_write_perms(fsname,
1278 ZFS_DELEG_PERM_RELEASE, cr);
1279 if (error != 0)
1280 return (error);
1281 }
1282 return (0);
1283 }
1284
1285 /*
1286 * Policy for allowing temporary snapshots to be taken or released
1287 */
1288 static int
1289 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1290 {
1291 /*
1292 * A temporary snapshot is the same as a snapshot,
1293 * hold, destroy and release all rolled into one.
1294 * Delegated diff alone is sufficient that we allow this.
1295 */
1296 int error;
1297
1298 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1299 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1300 return (0);
1301
1302 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1303 if (error == 0)
1304 error = zfs_secpolicy_hold(zc, innvl, cr);
1305 if (error == 0)
1306 error = zfs_secpolicy_release(zc, innvl, cr);
1307 if (error == 0)
1308 error = zfs_secpolicy_destroy(zc, innvl, cr);
1309 return (error);
1310 }
1311
1312 /*
1313 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1314 */
1315 static int
1316 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1317 {
1318 char *packed;
1319 int error;
1320 nvlist_t *list = NULL;
1321
1322 /*
1323 * Read in and unpack the user-supplied nvlist.
1324 */
1325 if (size == 0)
1326 return (SET_ERROR(EINVAL));
1327
1328 packed = kmem_alloc(size, KM_SLEEP);
1329
1330 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1331 iflag)) != 0) {
1332 kmem_free(packed, size);
1333 return (SET_ERROR(EFAULT));
1334 }
1335
1336 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1337 kmem_free(packed, size);
1338 return (error);
1339 }
1340
1341 kmem_free(packed, size);
1342
1343 *nvp = list;
1344 return (0);
1345 }
1346
1347 /*
1348 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1349 * Entries will be removed from the end of the nvlist, and one int32 entry
1350 * named "N_MORE_ERRORS" will be added indicating how many entries were
1351 * removed.
1352 */
1353 static int
1354 nvlist_smush(nvlist_t *errors, size_t max)
1355 {
1356 size_t size;
1357
1358 size = fnvlist_size(errors);
1359
1360 if (size > max) {
1361 nvpair_t *more_errors;
1362 int n = 0;
1363
1364 if (max < 1024)
1365 return (SET_ERROR(ENOMEM));
1366
1367 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1368 more_errors = nvlist_prev_nvpair(errors, NULL);
1369
1370 do {
1371 nvpair_t *pair = nvlist_prev_nvpair(errors,
1372 more_errors);
1373 fnvlist_remove_nvpair(errors, pair);
1374 n++;
1375 size = fnvlist_size(errors);
1376 } while (size > max);
1377
1378 fnvlist_remove_nvpair(errors, more_errors);
1379 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1380 ASSERT3U(fnvlist_size(errors), <=, max);
1381 }
1382
1383 return (0);
1384 }
1385
1386 static int
1387 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1388 {
1389 char *packed = NULL;
1390 int error = 0;
1391 size_t size;
1392
1393 size = fnvlist_size(nvl);
1394
1395 if (size > zc->zc_nvlist_dst_size) {
1396 error = SET_ERROR(ENOMEM);
1397 } else {
1398 packed = fnvlist_pack(nvl, &size);
1399 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1400 size, zc->zc_iflags) != 0)
1401 error = SET_ERROR(EFAULT);
1402 fnvlist_pack_free(packed, size);
1403 }
1404
1405 zc->zc_nvlist_dst_size = size;
1406 zc->zc_nvlist_dst_filled = B_TRUE;
1407 return (error);
1408 }
1409
1410 int
1411 getzfsvfs_impl(objset_t *os, zfsvfs_t **zfvp)
1412 {
1413 int error = 0;
1414 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1415 return (SET_ERROR(EINVAL));
1416 }
1417
1418 mutex_enter(&os->os_user_ptr_lock);
1419 *zfvp = dmu_objset_get_user(os);
1420 if (*zfvp) {
1421 VFS_HOLD((*zfvp)->z_vfs);
1422 } else {
1423 error = SET_ERROR(ESRCH);
1424 }
1425 mutex_exit(&os->os_user_ptr_lock);
1426 return (error);
1427 }
1428
1429 int
1430 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1431 {
1432 objset_t *os;
1433 int error;
1434
1435 error = dmu_objset_hold(dsname, FTAG, &os);
1436 if (error != 0)
1437 return (error);
1438
1439 error = getzfsvfs_impl(os, zfvp);
1440 dmu_objset_rele(os, FTAG);
1441 return (error);
1442 }
1443
1444 /*
1445 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1446 * case its z_vfs will be NULL, and it will be opened as the owner.
1447 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1448 * which prevents all vnode ops from running.
1449 */
1450 static int
1451 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1452 {
1453 int error = 0;
1454
1455 if (getzfsvfs(name, zfvp) != 0)
1456 error = zfsvfs_create(name, zfvp);
1457 if (error == 0) {
1458 rrm_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1459 RW_READER, tag);
1460 if ((*zfvp)->z_unmounted) {
1461 /*
1462 * XXX we could probably try again, since the unmounting
1463 * thread should be just about to disassociate the
1464 * objset from the zfsvfs.
1465 */
1466 rrm_exit(&(*zfvp)->z_teardown_lock, tag);
1467 return (SET_ERROR(EBUSY));
1468 }
1469 }
1470 return (error);
1471 }
1472
1473 static void
1474 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1475 {
1476 rrm_exit(&zfsvfs->z_teardown_lock, tag);
1477
1478 if (zfsvfs->z_vfs) {
1479 VFS_RELE(zfsvfs->z_vfs);
1480 } else {
1481 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1482 zfsvfs_free(zfsvfs);
1483 }
1484 }
1485
1486 static int
1487 zfs_ioc_pool_create(zfs_cmd_t *zc)
1488 {
1489 int error;
1490 nvlist_t *config, *props = NULL;
1491 nvlist_t *rootprops = NULL;
1492 nvlist_t *zplprops = NULL;
1493
1494 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1495 zc->zc_iflags, &config))
1496 return (error);
1497
1498 if (zc->zc_nvlist_src_size != 0 && (error =
1499 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1500 zc->zc_iflags, &props))) {
1501 nvlist_free(config);
1502 return (error);
1503 }
1504
1505 if (props) {
1506 nvlist_t *nvl = NULL;
1507 uint64_t version = SPA_VERSION;
1508
1509 (void) nvlist_lookup_uint64(props,
1510 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1511 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1512 error = SET_ERROR(EINVAL);
1513 goto pool_props_bad;
1514 }
1515 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1516 if (nvl) {
1517 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1518 if (error != 0) {
1519 nvlist_free(config);
1520 nvlist_free(props);
1521 return (error);
1522 }
1523 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1524 }
1525 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1526 error = zfs_fill_zplprops_root(version, rootprops,
1527 zplprops, NULL);
1528 if (error != 0)
1529 goto pool_props_bad;
1530 }
1531
1532 error = spa_create(zc->zc_name, config, props, zplprops);
1533
1534 /*
1535 * Set the remaining root properties
1536 */
1537 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1538 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1539 (void) spa_destroy(zc->zc_name);
1540
1541 pool_props_bad:
1542 nvlist_free(rootprops);
1543 nvlist_free(zplprops);
1544 nvlist_free(config);
1545 nvlist_free(props);
1546
1547 return (error);
1548 }
1549
1550 static int
1551 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1552 {
1553 int error;
1554 zfs_log_history(zc);
1555 error = spa_destroy(zc->zc_name);
1556 if (error == 0)
1557 zvol_remove_minors(zc->zc_name);
1558 return (error);
1559 }
1560
1561 static int
1562 zfs_ioc_pool_import(zfs_cmd_t *zc)
1563 {
1564 nvlist_t *config, *props = NULL;
1565 uint64_t guid;
1566 int error;
1567
1568 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1569 zc->zc_iflags, &config)) != 0)
1570 return (error);
1571
1572 if (zc->zc_nvlist_src_size != 0 && (error =
1573 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1574 zc->zc_iflags, &props))) {
1575 nvlist_free(config);
1576 return (error);
1577 }
1578
1579 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1580 guid != zc->zc_guid)
1581 error = SET_ERROR(EINVAL);
1582 else
1583 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1584
1585 if (zc->zc_nvlist_dst != 0) {
1586 int err;
1587
1588 if ((err = put_nvlist(zc, config)) != 0)
1589 error = err;
1590 }
1591
1592 nvlist_free(config);
1593
1594 nvlist_free(props);
1595
1596 return (error);
1597 }
1598
1599 static int
1600 zfs_ioc_pool_export(zfs_cmd_t *zc)
1601 {
1602 int error;
1603 boolean_t force = (boolean_t)zc->zc_cookie;
1604 boolean_t hardforce = (boolean_t)zc->zc_guid;
1605
1606 zfs_log_history(zc);
1607 error = spa_export(zc->zc_name, NULL, force, hardforce);
1608 if (error == 0)
1609 zvol_remove_minors(zc->zc_name);
1610 return (error);
1611 }
1612
1613 static int
1614 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1615 {
1616 nvlist_t *configs;
1617 int error;
1618
1619 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1620 return (SET_ERROR(EEXIST));
1621
1622 error = put_nvlist(zc, configs);
1623
1624 nvlist_free(configs);
1625
1626 return (error);
1627 }
1628
1629 /*
1630 * inputs:
1631 * zc_name name of the pool
1632 *
1633 * outputs:
1634 * zc_cookie real errno
1635 * zc_nvlist_dst config nvlist
1636 * zc_nvlist_dst_size size of config nvlist
1637 */
1638 static int
1639 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1640 {
1641 nvlist_t *config;
1642 int error;
1643 int ret = 0;
1644
1645 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1646 sizeof (zc->zc_value));
1647
1648 if (config != NULL) {
1649 ret = put_nvlist(zc, config);
1650 nvlist_free(config);
1651
1652 /*
1653 * The config may be present even if 'error' is non-zero.
1654 * In this case we return success, and preserve the real errno
1655 * in 'zc_cookie'.
1656 */
1657 zc->zc_cookie = error;
1658 } else {
1659 ret = error;
1660 }
1661
1662 return (ret);
1663 }
1664
1665 /*
1666 * Try to import the given pool, returning pool stats as appropriate so that
1667 * user land knows which devices are available and overall pool health.
1668 */
1669 static int
1670 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1671 {
1672 nvlist_t *tryconfig, *config;
1673 int error;
1674
1675 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1676 zc->zc_iflags, &tryconfig)) != 0)
1677 return (error);
1678
1679 config = spa_tryimport(tryconfig);
1680
1681 nvlist_free(tryconfig);
1682
1683 if (config == NULL)
1684 return (SET_ERROR(EINVAL));
1685
1686 error = put_nvlist(zc, config);
1687 nvlist_free(config);
1688
1689 return (error);
1690 }
1691
1692 /*
1693 * inputs:
1694 * zc_name name of the pool
1695 * zc_cookie scan func (pool_scan_func_t)
1696 * zc_flags scrub pause/resume flag (pool_scrub_cmd_t)
1697 */
1698 static int
1699 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1700 {
1701 spa_t *spa;
1702 int error;
1703
1704 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1705 return (error);
1706
1707 if (zc->zc_flags >= POOL_SCRUB_FLAGS_END)
1708 return (SET_ERROR(EINVAL));
1709
1710 if (zc->zc_flags == POOL_SCRUB_PAUSE)
1711 error = spa_scrub_pause_resume(spa, POOL_SCRUB_PAUSE);
1712 else if (zc->zc_cookie == POOL_SCAN_NONE)
1713 error = spa_scan_stop(spa);
1714 else
1715 error = spa_scan(spa, zc->zc_cookie);
1716
1717 spa_close(spa, FTAG);
1718
1719 return (error);
1720 }
1721
1722 static int
1723 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1724 {
1725 spa_t *spa;
1726 int error;
1727
1728 error = spa_open(zc->zc_name, &spa, FTAG);
1729 if (error == 0) {
1730 spa_freeze(spa);
1731 spa_close(spa, FTAG);
1732 }
1733 return (error);
1734 }
1735
1736 static int
1737 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1738 {
1739 spa_t *spa;
1740 int error;
1741
1742 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1743 return (error);
1744
1745 if (zc->zc_cookie < spa_version(spa) ||
1746 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1747 spa_close(spa, FTAG);
1748 return (SET_ERROR(EINVAL));
1749 }
1750
1751 spa_upgrade(spa, zc->zc_cookie);
1752 spa_close(spa, FTAG);
1753
1754 return (error);
1755 }
1756
1757 static int
1758 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1759 {
1760 spa_t *spa;
1761 char *hist_buf;
1762 uint64_t size;
1763 int error;
1764
1765 if ((size = zc->zc_history_len) == 0)
1766 return (SET_ERROR(EINVAL));
1767
1768 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1769 return (error);
1770
1771 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1772 spa_close(spa, FTAG);
1773 return (SET_ERROR(ENOTSUP));
1774 }
1775
1776 hist_buf = kmem_alloc(size, KM_SLEEP);
1777 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1778 &zc->zc_history_len, hist_buf)) == 0) {
1779 error = ddi_copyout(hist_buf,
1780 (void *)(uintptr_t)zc->zc_history,
1781 zc->zc_history_len, zc->zc_iflags);
1782 }
1783
1784 spa_close(spa, FTAG);
1785 kmem_free(hist_buf, size);
1786 return (error);
1787 }
1788
1789 static int
1790 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1791 {
1792 spa_t *spa;
1793 int error;
1794
1795 error = spa_open(zc->zc_name, &spa, FTAG);
1796 if (error == 0) {
1797 error = spa_change_guid(spa);
1798 spa_close(spa, FTAG);
1799 }
1800 return (error);
1801 }
1802
1803 static int
1804 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1805 {
1806 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1807 }
1808
1809 /*
1810 * inputs:
1811 * zc_name name of filesystem
1812 * zc_obj object to find
1813 *
1814 * outputs:
1815 * zc_value name of object
1816 */
1817 static int
1818 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1819 {
1820 objset_t *os;
1821 int error;
1822
1823 /* XXX reading from objset not owned */
1824 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1825 return (error);
1826 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1827 dmu_objset_rele(os, FTAG);
1828 return (SET_ERROR(EINVAL));
1829 }
1830 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1831 sizeof (zc->zc_value));
1832 dmu_objset_rele(os, FTAG);
1833
1834 return (error);
1835 }
1836
1837 /*
1838 * inputs:
1839 * zc_name name of filesystem
1840 * zc_obj object to find
1841 *
1842 * outputs:
1843 * zc_stat stats on object
1844 * zc_value path to object
1845 */
1846 static int
1847 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1848 {
1849 objset_t *os;
1850 int error;
1851
1852 /* XXX reading from objset not owned */
1853 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1854 return (error);
1855 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1856 dmu_objset_rele(os, FTAG);
1857 return (SET_ERROR(EINVAL));
1858 }
1859 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1860 sizeof (zc->zc_value));
1861 dmu_objset_rele(os, FTAG);
1862
1863 return (error);
1864 }
1865
1866 static int
1867 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1868 {
1869 spa_t *spa;
1870 int error;
1871 nvlist_t *config, **l2cache, **spares;
1872 uint_t nl2cache = 0, nspares = 0;
1873
1874 error = spa_open(zc->zc_name, &spa, FTAG);
1875 if (error != 0)
1876 return (error);
1877
1878 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1879 zc->zc_iflags, &config);
1880 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1881 &l2cache, &nl2cache);
1882
1883 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1884 &spares, &nspares);
1885
1886 /*
1887 * A root pool with concatenated devices is not supported.
1888 * Thus, can not add a device to a root pool.
1889 *
1890 * Intent log device can not be added to a rootpool because
1891 * during mountroot, zil is replayed, a seperated log device
1892 * can not be accessed during the mountroot time.
1893 *
1894 * l2cache and spare devices are ok to be added to a rootpool.
1895 */
1896 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1897 nvlist_free(config);
1898 spa_close(spa, FTAG);
1899 return (SET_ERROR(EDOM));
1900 }
1901
1902 if (error == 0) {
1903 error = spa_vdev_add(spa, config);
1904 nvlist_free(config);
1905 }
1906 spa_close(spa, FTAG);
1907 return (error);
1908 }
1909
1910 /*
1911 * inputs:
1912 * zc_name name of the pool
1913 * zc_guid guid of vdev to remove
1914 * zc_cookie cancel removal
1915 */
1916 static int
1917 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1918 {
1919 spa_t *spa;
1920 int error;
1921
1922 error = spa_open(zc->zc_name, &spa, FTAG);
1923 if (error != 0)
1924 return (error);
1925 if (zc->zc_cookie != 0) {
1926 error = spa_vdev_remove_cancel(spa);
1927 } else {
1928 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1929 }
1930 spa_close(spa, FTAG);
1931 return (error);
1932 }
1933
1934 static int
1935 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1936 {
1937 spa_t *spa;
1938 int error;
1939 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1940
1941 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1942 return (error);
1943 switch (zc->zc_cookie) {
1944 case VDEV_STATE_ONLINE:
1945 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1946 break;
1947
1948 case VDEV_STATE_OFFLINE:
1949 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1950 break;
1951
1952 case VDEV_STATE_FAULTED:
1953 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1954 zc->zc_obj != VDEV_AUX_EXTERNAL)
1955 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1956
1957 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1958 break;
1959
1960 case VDEV_STATE_DEGRADED:
1961 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1962 zc->zc_obj != VDEV_AUX_EXTERNAL)
1963 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1964
1965 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1966 break;
1967
1968 default:
1969 error = SET_ERROR(EINVAL);
1970 }
1971 zc->zc_cookie = newstate;
1972 spa_close(spa, FTAG);
1973 return (error);
1974 }
1975
1976 static int
1977 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1978 {
1979 spa_t *spa;
1980 int replacing = zc->zc_cookie;
1981 nvlist_t *config;
1982 int error;
1983
1984 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1985 return (error);
1986
1987 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1988 zc->zc_iflags, &config)) == 0) {
1989 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1990 nvlist_free(config);
1991 }
1992
1993 spa_close(spa, FTAG);
1994 return (error);
1995 }
1996
1997 static int
1998 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1999 {
2000 spa_t *spa;
2001 int error;
2002
2003 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
2004 return (error);
2005
2006 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
2007
2008 spa_close(spa, FTAG);
2009 return (error);
2010 }
2011
2012 static int
2013 zfs_ioc_vdev_split(zfs_cmd_t *zc)
2014 {
2015 spa_t *spa;
2016 nvlist_t *config, *props = NULL;
2017 int error;
2018 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
2019
2020 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
2021 return (error);
2022
2023 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
2024 zc->zc_iflags, &config)) {
2025 spa_close(spa, FTAG);
2026 return (error);
2027 }
2028
2029 if (zc->zc_nvlist_src_size != 0 && (error =
2030 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2031 zc->zc_iflags, &props))) {
2032 spa_close(spa, FTAG);
2033 nvlist_free(config);
2034 return (error);
2035 }
2036
2037 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
2038
2039 spa_close(spa, FTAG);
2040
2041 nvlist_free(config);
2042 nvlist_free(props);
2043
2044 return (error);
2045 }
2046
2047 static int
2048 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
2049 {
2050 spa_t *spa;
2051 char *path = zc->zc_value;
2052 uint64_t guid = zc->zc_guid;
2053 int error;
2054
2055 error = spa_open(zc->zc_name, &spa, FTAG);
2056 if (error != 0)
2057 return (error);
2058
2059 error = spa_vdev_setpath(spa, guid, path);
2060 spa_close(spa, FTAG);
2061 return (error);
2062 }
2063
2064 static int
2065 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
2066 {
2067 spa_t *spa;
2068 char *fru = zc->zc_value;
2069 uint64_t guid = zc->zc_guid;
2070 int error;
2071
2072 error = spa_open(zc->zc_name, &spa, FTAG);
2073 if (error != 0)
2074 return (error);
2075
2076 error = spa_vdev_setfru(spa, guid, fru);
2077 spa_close(spa, FTAG);
2078 return (error);
2079 }
2080
2081 static int
2082 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
2083 {
2084 int error = 0;
2085 nvlist_t *nv;
2086
2087 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2088
2089 if (zc->zc_nvlist_dst != 0 &&
2090 (error = dsl_prop_get_all(os, &nv)) == 0) {
2091 dmu_objset_stats(os, nv);
2092 /*
2093 * NB: zvol_get_stats() will read the objset contents,
2094 * which we aren't supposed to do with a
2095 * DS_MODE_USER hold, because it could be
2096 * inconsistent. So this is a bit of a workaround...
2097 * XXX reading with out owning
2098 */
2099 if (!zc->zc_objset_stats.dds_inconsistent &&
2100 dmu_objset_type(os) == DMU_OST_ZVOL) {
2101 error = zvol_get_stats(os, nv);
2102 if (error == EIO)
2103 return (error);
2104 VERIFY0(error);
2105 }
2106 error = put_nvlist(zc, nv);
2107 nvlist_free(nv);
2108 }
2109
2110 return (error);
2111 }
2112
2113 /*
2114 * inputs:
2115 * zc_name name of filesystem
2116 * zc_nvlist_dst_size size of buffer for property nvlist
2117 *
2118 * outputs:
2119 * zc_objset_stats stats
2120 * zc_nvlist_dst property nvlist
2121 * zc_nvlist_dst_size size of property nvlist
2122 */
2123 static int
2124 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2125 {
2126 objset_t *os;
2127 int error;
2128
2129 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2130 if (error == 0) {
2131 error = zfs_ioc_objset_stats_impl(zc, os);
2132 dmu_objset_rele(os, FTAG);
2133 }
2134
2135 return (error);
2136 }
2137
2138 /*
2139 * inputs:
2140 * zc_name name of filesystem
2141 * zc_nvlist_dst_size size of buffer for property nvlist
2142 *
2143 * outputs:
2144 * zc_nvlist_dst received property nvlist
2145 * zc_nvlist_dst_size size of received property nvlist
2146 *
2147 * Gets received properties (distinct from local properties on or after
2148 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2149 * local property values.
2150 */
2151 static int
2152 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2153 {
2154 int error = 0;
2155 nvlist_t *nv;
2156
2157 /*
2158 * Without this check, we would return local property values if the
2159 * caller has not already received properties on or after
2160 * SPA_VERSION_RECVD_PROPS.
2161 */
2162 if (!dsl_prop_get_hasrecvd(zc->zc_name))
2163 return (SET_ERROR(ENOTSUP));
2164
2165 if (zc->zc_nvlist_dst != 0 &&
2166 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2167 error = put_nvlist(zc, nv);
2168 nvlist_free(nv);
2169 }
2170
2171 return (error);
2172 }
2173
2174 static int
2175 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2176 {
2177 uint64_t value;
2178 int error;
2179
2180 /*
2181 * zfs_get_zplprop() will either find a value or give us
2182 * the default value (if there is one).
2183 */
2184 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2185 return (error);
2186 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2187 return (0);
2188 }
2189
2190 /*
2191 * inputs:
2192 * zc_name name of filesystem
2193 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2194 *
2195 * outputs:
2196 * zc_nvlist_dst zpl property nvlist
2197 * zc_nvlist_dst_size size of zpl property nvlist
2198 */
2199 static int
2200 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2201 {
2202 objset_t *os;
2203 int err;
2204
2205 /* XXX reading without owning */
2206 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2207 return (err);
2208
2209 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2210
2211 /*
2212 * NB: nvl_add_zplprop() will read the objset contents,
2213 * which we aren't supposed to do with a DS_MODE_USER
2214 * hold, because it could be inconsistent.
2215 */
2216 if (zc->zc_nvlist_dst != NULL &&
2217 !zc->zc_objset_stats.dds_inconsistent &&
2218 dmu_objset_type(os) == DMU_OST_ZFS) {
2219 nvlist_t *nv;
2220
2221 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2222 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2223 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2224 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2225 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2226 err = put_nvlist(zc, nv);
2227 nvlist_free(nv);
2228 } else {
2229 err = SET_ERROR(ENOENT);
2230 }
2231 dmu_objset_rele(os, FTAG);
2232 return (err);
2233 }
2234
2235 static boolean_t
2236 dataset_name_hidden(const char *name)
2237 {
2238 /*
2239 * Skip over datasets that are not visible in this zone,
2240 * internal datasets (which have a $ in their name), and
2241 * temporary datasets (which have a % in their name).
2242 */
2243 if (strchr(name, '$') != NULL)
2244 return (B_TRUE);
2245 if (strchr(name, '%') != NULL)
2246 return (B_TRUE);
2247 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2248 return (B_TRUE);
2249 return (B_FALSE);
2250 }
2251
2252 /*
2253 * inputs:
2254 * zc_name name of filesystem
2255 * zc_cookie zap cursor
2256 * zc_nvlist_dst_size size of buffer for property nvlist
2257 *
2258 * outputs:
2259 * zc_name name of next filesystem
2260 * zc_cookie zap cursor
2261 * zc_objset_stats stats
2262 * zc_nvlist_dst property nvlist
2263 * zc_nvlist_dst_size size of property nvlist
2264 */
2265 static int
2266 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2267 {
2268 objset_t *os;
2269 int error;
2270 char *p;
2271 size_t orig_len = strlen(zc->zc_name);
2272
2273 top:
2274 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2275 if (error == ENOENT)
2276 error = SET_ERROR(ESRCH);
2277 return (error);
2278 }
2279
2280 p = strrchr(zc->zc_name, '/');
2281 if (p == NULL || p[1] != '\0')
2282 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2283 p = zc->zc_name + strlen(zc->zc_name);
2284
2285 do {
2286 error = dmu_dir_list_next(os,
2287 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2288 NULL, &zc->zc_cookie);
2289 if (error == ENOENT)
2290 error = SET_ERROR(ESRCH);
2291 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2292 dmu_objset_rele(os, FTAG);
2293
2294 /*
2295 * If it's an internal dataset (ie. with a '$' in its name),
2296 * don't try to get stats for it, otherwise we'll return ENOENT.
2297 */
2298 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2299 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2300 if (error == ENOENT) {
2301 /* We lost a race with destroy, get the next one. */
2302 zc->zc_name[orig_len] = '\0';
2303 goto top;
2304 }
2305 }
2306 return (error);
2307 }
2308
2309 /*
2310 * inputs:
2311 * zc_name name of filesystem
2312 * zc_cookie zap cursor
2313 * zc_nvlist_dst_size size of buffer for property nvlist
2314 * zc_simple when set, only name is requested
2315 *
2316 * outputs:
2317 * zc_name name of next snapshot
2318 * zc_objset_stats stats
2319 * zc_nvlist_dst property nvlist
2320 * zc_nvlist_dst_size size of property nvlist
2321 */
2322 static int
2323 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2324 {
2325 objset_t *os;
2326 int error;
2327
2328 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2329 if (error != 0) {
2330 return (error == ENOENT ? ESRCH : error);
2331 }
2332
2333 /*
2334 * A dataset name of maximum length cannot have any snapshots,
2335 * so exit immediately.
2336 */
2337 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >=
2338 ZFS_MAX_DATASET_NAME_LEN) {
2339 dmu_objset_rele(os, FTAG);
2340 return (SET_ERROR(ESRCH));
2341 }
2342
2343 error = dmu_snapshot_list_next(os,
2344 sizeof (zc->zc_name) - strlen(zc->zc_name),
2345 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2346 NULL);
2347
2348 if (error == 0 && !zc->zc_simple) {
2349 dsl_dataset_t *ds;
2350 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2351
2352 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2353 if (error == 0) {
2354 objset_t *ossnap;
2355
2356 error = dmu_objset_from_ds(ds, &ossnap);
2357 if (error == 0)
2358 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2359 dsl_dataset_rele(ds, FTAG);
2360 }
2361 } else if (error == ENOENT) {
2362 error = SET_ERROR(ESRCH);
2363 }
2364
2365 dmu_objset_rele(os, FTAG);
2366 /* if we failed, undo the @ that we tacked on to zc_name */
2367 if (error != 0)
2368 *strchr(zc->zc_name, '@') = '\0';
2369 return (error);
2370 }
2371
2372 static int
2373 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2374 {
2375 const char *propname = nvpair_name(pair);
2376 uint64_t *valary;
2377 unsigned int vallen;
2378 const char *domain;
2379 char *dash;
2380 zfs_userquota_prop_t type;
2381 uint64_t rid;
2382 uint64_t quota;
2383 zfsvfs_t *zfsvfs;
2384 int err;
2385
2386 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2387 nvlist_t *attrs;
2388 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2389 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2390 &pair) != 0)
2391 return (SET_ERROR(EINVAL));
2392 }
2393
2394 /*
2395 * A correctly constructed propname is encoded as
2396 * userquota@<rid>-<domain>.
2397 */
2398 if ((dash = strchr(propname, '-')) == NULL ||
2399 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2400 vallen != 3)
2401 return (SET_ERROR(EINVAL));
2402
2403 domain = dash + 1;
2404 type = valary[0];
2405 rid = valary[1];
2406 quota = valary[2];
2407
2408 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2409 if (err == 0) {
2410 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2411 zfsvfs_rele(zfsvfs, FTAG);
2412 }
2413
2414 return (err);
2415 }
2416
2417 /*
2418 * If the named property is one that has a special function to set its value,
2419 * return 0 on success and a positive error code on failure; otherwise if it is
2420 * not one of the special properties handled by this function, return -1.
2421 *
2422 * XXX: It would be better for callers of the property interface if we handled
2423 * these special cases in dsl_prop.c (in the dsl layer).
2424 */
2425 static int
2426 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2427 nvpair_t *pair)
2428 {
2429 const char *propname = nvpair_name(pair);
2430 zfs_prop_t prop = zfs_name_to_prop(propname);
2431 uint64_t intval;
2432 int err = -1;
2433
2434 if (prop == ZPROP_INVAL) {
2435 if (zfs_prop_userquota(propname))
2436 return (zfs_prop_set_userquota(dsname, pair));
2437 return (-1);
2438 }
2439
2440 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2441 nvlist_t *attrs;
2442 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2443 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2444 &pair) == 0);
2445 }
2446
2447 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2448 return (-1);
2449
2450 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2451
2452 switch (prop) {
2453 case ZFS_PROP_QUOTA:
2454 err = dsl_dir_set_quota(dsname, source, intval);
2455 break;
2456 case ZFS_PROP_REFQUOTA:
2457 err = dsl_dataset_set_refquota(dsname, source, intval);
2458 break;
2459 case ZFS_PROP_FILESYSTEM_LIMIT:
2460 case ZFS_PROP_SNAPSHOT_LIMIT:
2461 if (intval == UINT64_MAX) {
2462 /* clearing the limit, just do it */
2463 err = 0;
2464 } else {
2465 err = dsl_dir_activate_fs_ss_limit(dsname);
2466 }
2467 /*
2468 * Set err to -1 to force the zfs_set_prop_nvlist code down the
2469 * default path to set the value in the nvlist.
2470 */
2471 if (err == 0)
2472 err = -1;
2473 break;
2474 case ZFS_PROP_RESERVATION:
2475 err = dsl_dir_set_reservation(dsname, source, intval);
2476 break;
2477 case ZFS_PROP_REFRESERVATION:
2478 err = dsl_dataset_set_refreservation(dsname, source, intval);
2479 break;
2480 case ZFS_PROP_VOLSIZE:
2481 err = zvol_set_volsize(dsname, intval);
2482 break;
2483 case ZFS_PROP_VERSION:
2484 {
2485 zfsvfs_t *zfsvfs;
2486
2487 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2488 break;
2489
2490 err = zfs_set_version(zfsvfs, intval);
2491 zfsvfs_rele(zfsvfs, FTAG);
2492
2493 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2494 zfs_cmd_t *zc;
2495
2496 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2497 (void) strcpy(zc->zc_name, dsname);
2498 (void) zfs_ioc_userspace_upgrade(zc);
2499 kmem_free(zc, sizeof (zfs_cmd_t));
2500 }
2501 break;
2502 }
2503 default:
2504 err = -1;
2505 }
2506
2507 return (err);
2508 }
2509
2510 /*
2511 * This function is best effort. If it fails to set any of the given properties,
2512 * it continues to set as many as it can and returns the last error
2513 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2514 * with the list of names of all the properties that failed along with the
2515 * corresponding error numbers.
2516 *
2517 * If every property is set successfully, zero is returned and errlist is not
2518 * modified.
2519 */
2520 int
2521 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2522 nvlist_t *errlist)
2523 {
2524 nvpair_t *pair;
2525 nvpair_t *propval;
2526 int rv = 0;
2527 uint64_t intval;
2528 char *strval;
2529 nvlist_t *genericnvl = fnvlist_alloc();
2530 nvlist_t *retrynvl = fnvlist_alloc();
2531
2532 retry:
2533 pair = NULL;
2534 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2535 const char *propname = nvpair_name(pair);
2536 zfs_prop_t prop = zfs_name_to_prop(propname);
2537 int err = 0;
2538
2539 /* decode the property value */
2540 propval = pair;
2541 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2542 nvlist_t *attrs;
2543 attrs = fnvpair_value_nvlist(pair);
2544 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2545 &propval) != 0)
2546 err = SET_ERROR(EINVAL);
2547 }
2548
2549 /* Validate value type */
2550 if (err == 0 && prop == ZPROP_INVAL) {
2551 if (zfs_prop_user(propname)) {
2552 if (nvpair_type(propval) != DATA_TYPE_STRING)
2553 err = SET_ERROR(EINVAL);
2554 } else if (zfs_prop_userquota(propname)) {
2555 if (nvpair_type(propval) !=
2556 DATA_TYPE_UINT64_ARRAY)
2557 err = SET_ERROR(EINVAL);
2558 } else {
2559 err = SET_ERROR(EINVAL);
2560 }
2561 } else if (err == 0) {
2562 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2563 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2564 err = SET_ERROR(EINVAL);
2565 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2566 const char *unused;
2567
2568 intval = fnvpair_value_uint64(propval);
2569
2570 switch (zfs_prop_get_type(prop)) {
2571 case PROP_TYPE_NUMBER:
2572 break;
2573 case PROP_TYPE_STRING:
2574 err = SET_ERROR(EINVAL);
2575 break;
2576 case PROP_TYPE_INDEX:
2577 if (zfs_prop_index_to_string(prop,
2578 intval, &unused) != 0)
2579 err = SET_ERROR(EINVAL);
2580 break;
2581 default:
2582 cmn_err(CE_PANIC,
2583 "unknown property type");
2584 }
2585 } else {
2586 err = SET_ERROR(EINVAL);
2587 }
2588 }
2589
2590 /* Validate permissions */
2591 if (err == 0)
2592 err = zfs_check_settable(dsname, pair, CRED());
2593
2594 if (err == 0) {
2595 err = zfs_prop_set_special(dsname, source, pair);
2596 if (err == -1) {
2597 /*
2598 * For better performance we build up a list of
2599 * properties to set in a single transaction.
2600 */
2601 err = nvlist_add_nvpair(genericnvl, pair);
2602 } else if (err != 0 && nvl != retrynvl) {
2603 /*
2604 * This may be a spurious error caused by
2605 * receiving quota and reservation out of order.
2606 * Try again in a second pass.
2607 */
2608 err = nvlist_add_nvpair(retrynvl, pair);
2609 }
2610 }
2611
2612 if (err != 0) {
2613 if (errlist != NULL)
2614 fnvlist_add_int32(errlist, propname, err);
2615 rv = err;
2616 }
2617 }
2618
2619 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2620 nvl = retrynvl;
2621 goto retry;
2622 }
2623
2624 if (!nvlist_empty(genericnvl) &&
2625 dsl_props_set(dsname, source, genericnvl) != 0) {
2626 /*
2627 * If this fails, we still want to set as many properties as we
2628 * can, so try setting them individually.
2629 */
2630 pair = NULL;
2631 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2632 const char *propname = nvpair_name(pair);
2633 int err = 0;
2634
2635 propval = pair;
2636 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2637 nvlist_t *attrs;
2638 attrs = fnvpair_value_nvlist(pair);
2639 propval = fnvlist_lookup_nvpair(attrs,
2640 ZPROP_VALUE);
2641 }
2642
2643 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2644 strval = fnvpair_value_string(propval);
2645 err = dsl_prop_set_string(dsname, propname,
2646 source, strval);
2647 } else {
2648 intval = fnvpair_value_uint64(propval);
2649 err = dsl_prop_set_int(dsname, propname, source,
2650 intval);
2651 }
2652
2653 if (err != 0) {
2654 if (errlist != NULL) {
2655 fnvlist_add_int32(errlist, propname,
2656 err);
2657 }
2658 rv = err;
2659 }
2660 }
2661 }
2662 nvlist_free(genericnvl);
2663 nvlist_free(retrynvl);
2664
2665 return (rv);
2666 }
2667
2668 /*
2669 * Check that all the properties are valid user properties.
2670 */
2671 static int
2672 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2673 {
2674 nvpair_t *pair = NULL;
2675 int error = 0;
2676
2677 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2678 const char *propname = nvpair_name(pair);
2679
2680 if (!zfs_prop_user(propname) ||
2681 nvpair_type(pair) != DATA_TYPE_STRING)
2682 return (SET_ERROR(EINVAL));
2683
2684 if (error = zfs_secpolicy_write_perms(fsname,
2685 ZFS_DELEG_PERM_USERPROP, CRED()))
2686 return (error);
2687
2688 if (strlen(propname) >= ZAP_MAXNAMELEN)
2689 return (SET_ERROR(ENAMETOOLONG));
2690
2691 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN)
2692 return (E2BIG);
2693 }
2694 return (0);
2695 }
2696
2697 static void
2698 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2699 {
2700 nvpair_t *pair;
2701
2702 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2703
2704 pair = NULL;
2705 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2706 if (nvlist_exists(skipped, nvpair_name(pair)))
2707 continue;
2708
2709 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2710 }
2711 }
2712
2713 static int
2714 clear_received_props(const char *dsname, nvlist_t *props,
2715 nvlist_t *skipped)
2716 {
2717 int err = 0;
2718 nvlist_t *cleared_props = NULL;
2719 props_skip(props, skipped, &cleared_props);
2720 if (!nvlist_empty(cleared_props)) {
2721 /*
2722 * Acts on local properties until the dataset has received
2723 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2724 */
2725 zprop_source_t flags = (ZPROP_SRC_NONE |
2726 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2727 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2728 }
2729 nvlist_free(cleared_props);
2730 return (err);
2731 }
2732
2733 /*
2734 * inputs:
2735 * zc_name name of filesystem
2736 * zc_value name of property to set
2737 * zc_nvlist_src{_size} nvlist of properties to apply
2738 * zc_cookie received properties flag
2739 *
2740 * outputs:
2741 * zc_nvlist_dst{_size} error for each unapplied received property
2742 */
2743 static int
2744 zfs_ioc_set_prop(zfs_cmd_t *zc)
2745 {
2746 nvlist_t *nvl;
2747 boolean_t received = zc->zc_cookie;
2748 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2749 ZPROP_SRC_LOCAL);
2750 nvlist_t *errors;
2751 int error;
2752
2753 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2754 zc->zc_iflags, &nvl)) != 0)
2755 return (error);
2756
2757 if (received) {
2758 nvlist_t *origprops;
2759
2760 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2761 (void) clear_received_props(zc->zc_name,
2762 origprops, nvl);
2763 nvlist_free(origprops);
2764 }
2765
2766 error = dsl_prop_set_hasrecvd(zc->zc_name);
2767 }
2768
2769 errors = fnvlist_alloc();
2770 if (error == 0)
2771 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2772
2773 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2774 (void) put_nvlist(zc, errors);
2775 }
2776
2777 nvlist_free(errors);
2778 nvlist_free(nvl);
2779 return (error);
2780 }
2781
2782 /*
2783 * inputs:
2784 * zc_name name of filesystem
2785 * zc_value name of property to inherit
2786 * zc_cookie revert to received value if TRUE
2787 *
2788 * outputs: none
2789 */
2790 static int
2791 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2792 {
2793 const char *propname = zc->zc_value;
2794 zfs_prop_t prop = zfs_name_to_prop(propname);
2795 boolean_t received = zc->zc_cookie;
2796 zprop_source_t source = (received
2797 ? ZPROP_SRC_NONE /* revert to received value, if any */
2798 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2799
2800 if (received) {
2801 nvlist_t *dummy;
2802 nvpair_t *pair;
2803 zprop_type_t type;
2804 int err;
2805
2806 /*
2807 * zfs_prop_set_special() expects properties in the form of an
2808 * nvpair with type info.
2809 */
2810 if (prop == ZPROP_INVAL) {
2811 if (!zfs_prop_user(propname))
2812 return (SET_ERROR(EINVAL));
2813
2814 type = PROP_TYPE_STRING;
2815 } else if (prop == ZFS_PROP_VOLSIZE ||
2816 prop == ZFS_PROP_VERSION) {
2817 return (SET_ERROR(EINVAL));
2818 } else {
2819 type = zfs_prop_get_type(prop);
2820 }
2821
2822 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2823
2824 switch (type) {
2825 case PROP_TYPE_STRING:
2826 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2827 break;
2828 case PROP_TYPE_NUMBER:
2829 case PROP_TYPE_INDEX:
2830 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2831 break;
2832 default:
2833 nvlist_free(dummy);
2834 return (SET_ERROR(EINVAL));
2835 }
2836
2837 pair = nvlist_next_nvpair(dummy, NULL);
2838 err = zfs_prop_set_special(zc->zc_name, source, pair);
2839 nvlist_free(dummy);
2840 if (err != -1)
2841 return (err); /* special property already handled */
2842 } else {
2843 /*
2844 * Only check this in the non-received case. We want to allow
2845 * 'inherit -S' to revert non-inheritable properties like quota
2846 * and reservation to the received or default values even though
2847 * they are not considered inheritable.
2848 */
2849 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2850 return (SET_ERROR(EINVAL));
2851 }
2852
2853 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2854 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2855 }
2856
2857 static int
2858 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2859 {
2860 nvlist_t *props;
2861 spa_t *spa;
2862 int error;
2863 nvpair_t *pair;
2864
2865 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2866 zc->zc_iflags, &props))
2867 return (error);
2868
2869 /*
2870 * If the only property is the configfile, then just do a spa_lookup()
2871 * to handle the faulted case.
2872 */
2873 pair = nvlist_next_nvpair(props, NULL);
2874 if (pair != NULL && strcmp(nvpair_name(pair),
2875 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2876 nvlist_next_nvpair(props, pair) == NULL) {
2877 mutex_enter(&spa_namespace_lock);
2878 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2879 spa_configfile_set(spa, props, B_FALSE);
2880 spa_write_cachefile(spa, B_FALSE, B_TRUE);
2881 }
2882 mutex_exit(&spa_namespace_lock);
2883 if (spa != NULL) {
2884 nvlist_free(props);
2885 return (0);
2886 }
2887 }
2888
2889 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2890 nvlist_free(props);
2891 return (error);
2892 }
2893
2894 error = spa_prop_set(spa, props);
2895
2896 nvlist_free(props);
2897 spa_close(spa, FTAG);
2898
2899 return (error);
2900 }
2901
2902 static int
2903 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2904 {
2905 spa_t *spa;
2906 int error;
2907 nvlist_t *nvp = NULL;
2908
2909 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2910 /*
2911 * If the pool is faulted, there may be properties we can still
2912 * get (such as altroot and cachefile), so attempt to get them
2913 * anyway.
2914 */
2915 mutex_enter(&spa_namespace_lock);
2916 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2917 error = spa_prop_get(spa, &nvp);
2918 mutex_exit(&spa_namespace_lock);
2919 } else {
2920 error = spa_prop_get(spa, &nvp);
2921 spa_close(spa, FTAG);
2922 }
2923
2924 if (error == 0 && zc->zc_nvlist_dst != NULL)
2925 error = put_nvlist(zc, nvp);
2926 else
2927 error = SET_ERROR(EFAULT);
2928
2929 nvlist_free(nvp);
2930 return (error);
2931 }
2932
2933 /*
2934 * inputs:
2935 * zc_name name of filesystem
2936 * zc_nvlist_src{_size} nvlist of delegated permissions
2937 * zc_perm_action allow/unallow flag
2938 *
2939 * outputs: none
2940 */
2941 static int
2942 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2943 {
2944 int error;
2945 nvlist_t *fsaclnv = NULL;
2946
2947 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2948 zc->zc_iflags, &fsaclnv)) != 0)
2949 return (error);
2950
2951 /*
2952 * Verify nvlist is constructed correctly
2953 */
2954 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2955 nvlist_free(fsaclnv);
2956 return (SET_ERROR(EINVAL));
2957 }
2958
2959 /*
2960 * If we don't have PRIV_SYS_MOUNT, then validate
2961 * that user is allowed to hand out each permission in
2962 * the nvlist(s)
2963 */
2964
2965 error = secpolicy_zfs(CRED());
2966 if (error != 0) {
2967 if (zc->zc_perm_action == B_FALSE) {
2968 error = dsl_deleg_can_allow(zc->zc_name,
2969 fsaclnv, CRED());
2970 } else {
2971 error = dsl_deleg_can_unallow(zc->zc_name,
2972 fsaclnv, CRED());
2973 }
2974 }
2975
2976 if (error == 0)
2977 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2978
2979 nvlist_free(fsaclnv);
2980 return (error);
2981 }
2982
2983 /*
2984 * inputs:
2985 * zc_name name of filesystem
2986 *
2987 * outputs:
2988 * zc_nvlist_src{_size} nvlist of delegated permissions
2989 */
2990 static int
2991 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2992 {
2993 nvlist_t *nvp;
2994 int error;
2995
2996 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2997 error = put_nvlist(zc, nvp);
2998 nvlist_free(nvp);
2999 }
3000
3001 return (error);
3002 }
3003
3004 /* ARGSUSED */
3005 static void
3006 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
3007 {
3008 zfs_creat_t *zct = arg;
3009
3010 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
3011 }
3012
3013 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
3014
3015 /*
3016 * inputs:
3017 * os parent objset pointer (NULL if root fs)
3018 * fuids_ok fuids allowed in this version of the spa?
3019 * sa_ok SAs allowed in this version of the spa?
3020 * createprops list of properties requested by creator
3021 *
3022 * outputs:
3023 * zplprops values for the zplprops we attach to the master node object
3024 * is_ci true if requested file system will be purely case-insensitive
3025 *
3026 * Determine the settings for utf8only, normalization and
3027 * casesensitivity. Specific values may have been requested by the
3028 * creator and/or we can inherit values from the parent dataset. If
3029 * the file system is of too early a vintage, a creator can not
3030 * request settings for these properties, even if the requested
3031 * setting is the default value. We don't actually want to create dsl
3032 * properties for these, so remove them from the source nvlist after
3033 * processing.
3034 */
3035 static int
3036 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
3037 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
3038 nvlist_t *zplprops, boolean_t *is_ci)
3039 {
3040 uint64_t sense = ZFS_PROP_UNDEFINED;
3041 uint64_t norm = ZFS_PROP_UNDEFINED;
3042 uint64_t u8 = ZFS_PROP_UNDEFINED;
3043
3044 ASSERT(zplprops != NULL);
3045
3046 if (os != NULL && os->os_phys->os_type != DMU_OST_ZFS)
3047 return (SET_ERROR(EINVAL));
3048
3049 /*
3050 * Pull out creator prop choices, if any.
3051 */
3052 if (createprops) {
3053 (void) nvlist_lookup_uint64(createprops,
3054 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
3055 (void) nvlist_lookup_uint64(createprops,
3056 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
3057 (void) nvlist_remove_all(createprops,
3058 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
3059 (void) nvlist_lookup_uint64(createprops,
3060 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
3061 (void) nvlist_remove_all(createprops,
3062 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
3063 (void) nvlist_lookup_uint64(createprops,
3064 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3065 (void) nvlist_remove_all(createprops,
3066 zfs_prop_to_name(ZFS_PROP_CASE));
3067 }
3068
3069 /*
3070 * If the zpl version requested is whacky or the file system
3071 * or pool is version is too "young" to support normalization
3072 * and the creator tried to set a value for one of the props,
3073 * error out.
3074 */
3075 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3076 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3077 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3078 (zplver < ZPL_VERSION_NORMALIZATION &&
3079 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3080 sense != ZFS_PROP_UNDEFINED)))
3081 return (SET_ERROR(ENOTSUP));
3082
3083 /*
3084 * Put the version in the zplprops
3085 */
3086 VERIFY(nvlist_add_uint64(zplprops,
3087 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3088
3089 if (norm == ZFS_PROP_UNDEFINED)
3090 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3091 VERIFY(nvlist_add_uint64(zplprops,
3092 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3093
3094 /*
3095 * If we're normalizing, names must always be valid UTF-8 strings.
3096 */
3097 if (norm)
3098 u8 = 1;
3099 if (u8 == ZFS_PROP_UNDEFINED)
3100 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3101 VERIFY(nvlist_add_uint64(zplprops,
3102 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3103
3104 if (sense == ZFS_PROP_UNDEFINED)
3105 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3106 VERIFY(nvlist_add_uint64(zplprops,
3107 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3108
3109 if (is_ci)
3110 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3111
3112 return (0);
3113 }
3114
3115 static int
3116 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3117 nvlist_t *zplprops, boolean_t *is_ci)
3118 {
3119 boolean_t fuids_ok, sa_ok;
3120 uint64_t zplver = ZPL_VERSION;
3121 objset_t *os = NULL;
3122 char parentname[ZFS_MAX_DATASET_NAME_LEN];
3123 char *cp;
3124 spa_t *spa;
3125 uint64_t spa_vers;
3126 int error;
3127
3128 (void) strlcpy(parentname, dataset, sizeof (parentname));
3129 cp = strrchr(parentname, '/');
3130 ASSERT(cp != NULL);
3131 cp[0] = '\0';
3132
3133 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3134 return (error);
3135
3136 spa_vers = spa_version(spa);
3137 spa_close(spa, FTAG);
3138
3139 zplver = zfs_zpl_version_map(spa_vers);
3140 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3141 sa_ok = (zplver >= ZPL_VERSION_SA);
3142
3143 /*
3144 * Open parent object set so we can inherit zplprop values.
3145 */
3146 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3147 return (error);
3148
3149 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3150 zplprops, is_ci);
3151 dmu_objset_rele(os, FTAG);
3152 return (error);
3153 }
3154
3155 static int
3156 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3157 nvlist_t *zplprops, boolean_t *is_ci)
3158 {
3159 boolean_t fuids_ok;
3160 boolean_t sa_ok;
3161 uint64_t zplver = ZPL_VERSION;
3162 int error;
3163
3164 zplver = zfs_zpl_version_map(spa_vers);
3165 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3166 sa_ok = (zplver >= ZPL_VERSION_SA);
3167
3168 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3169 createprops, zplprops, is_ci);
3170 return (error);
3171 }
3172
3173 /*
3174 * innvl: {
3175 * "type" -> dmu_objset_type_t (int32)
3176 * (optional) "props" -> { prop -> value }
3177 * }
3178 *
3179 * outnvl: propname -> error code (int32)
3180 */
3181 static int
3182 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3183 {
3184 int error = 0;
3185 zfs_creat_t zct = { 0 };
3186 nvlist_t *nvprops = NULL;
3187 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3188 int32_t type32;
3189 dmu_objset_type_t type;
3190 boolean_t is_insensitive = B_FALSE;
3191
3192 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3193 return (SET_ERROR(EINVAL));
3194 type = type32;
3195 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3196
3197 switch (type) {
3198 case DMU_OST_ZFS:
3199 cbfunc = zfs_create_cb;
3200 break;
3201
3202 case DMU_OST_ZVOL:
3203 cbfunc = zvol_create_cb;
3204 break;
3205
3206 default:
3207 cbfunc = NULL;
3208 break;
3209 }
3210 if (strchr(fsname, '@') ||
3211 strchr(fsname, '%'))
3212 return (SET_ERROR(EINVAL));
3213
3214 zct.zct_props = nvprops;
3215
3216 if (cbfunc == NULL)
3217 return (SET_ERROR(EINVAL));
3218
3219 if (type == DMU_OST_ZVOL) {
3220 uint64_t volsize, volblocksize;
3221
3222 if (nvprops == NULL)
3223 return (SET_ERROR(EINVAL));
3224 if (nvlist_lookup_uint64(nvprops,
3225 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3226 return (SET_ERROR(EINVAL));
3227
3228 if ((error = nvlist_lookup_uint64(nvprops,
3229 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3230 &volblocksize)) != 0 && error != ENOENT)
3231 return (SET_ERROR(EINVAL));
3232
3233 if (error != 0)
3234 volblocksize = zfs_prop_default_numeric(
3235 ZFS_PROP_VOLBLOCKSIZE);
3236
3237 if ((error = zvol_check_volblocksize(
3238 volblocksize)) != 0 ||
3239 (error = zvol_check_volsize(volsize,
3240 volblocksize)) != 0)
3241 return (error);
3242 } else if (type == DMU_OST_ZFS) {
3243 int error;
3244
3245 /*
3246 * We have to have normalization and
3247 * case-folding flags correct when we do the
3248 * file system creation, so go figure them out
3249 * now.
3250 */
3251 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3252 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3253 error = zfs_fill_zplprops(fsname, nvprops,
3254 zct.zct_zplprops, &is_insensitive);
3255 if (error != 0) {
3256 nvlist_free(zct.zct_zplprops);
3257 return (error);
3258 }
3259 }
3260
3261 error = dmu_objset_create(fsname, type,
3262 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3263 nvlist_free(zct.zct_zplprops);
3264
3265 /*
3266 * It would be nice to do this atomically.
3267 */
3268 if (error == 0) {
3269 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3270 nvprops, outnvl);
3271 if (error != 0)
3272 (void) dsl_destroy_head(fsname);
3273 }
3274 return (error);
3275 }
3276
3277 /*
3278 * innvl: {
3279 * "origin" -> name of origin snapshot
3280 * (optional) "props" -> { prop -> value }
3281 * }
3282 *
3283 * outnvl: propname -> error code (int32)
3284 */
3285 static int
3286 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3287 {
3288 int error = 0;
3289 nvlist_t *nvprops = NULL;
3290 char *origin_name;
3291
3292 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3293 return (SET_ERROR(EINVAL));
3294 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3295
3296 if (strchr(fsname, '@') ||
3297 strchr(fsname, '%'))
3298 return (SET_ERROR(EINVAL));
3299
3300 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3301 return (SET_ERROR(EINVAL));
3302 error = dmu_objset_clone(fsname, origin_name);
3303 if (error != 0)
3304 return (error);
3305
3306 /*
3307 * It would be nice to do this atomically.
3308 */
3309 if (error == 0) {
3310 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3311 nvprops, outnvl);
3312 if (error != 0)
3313 (void) dsl_destroy_head(fsname);
3314 }
3315 return (error);
3316 }
3317
3318 /* ARGSUSED */
3319 static int
3320 zfs_ioc_remap(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3321 {
3322 if (strchr(fsname, '@') ||
3323 strchr(fsname, '%'))
3324 return (SET_ERROR(EINVAL));
3325
3326 return (dmu_objset_remap_indirects(fsname));
3327 }
3328
3329 /*
3330 * innvl: {
3331 * "snaps" -> { snapshot1, snapshot2 }
3332 * (optional) "props" -> { prop -> value (string) }
3333 * }
3334 *
3335 * outnvl: snapshot -> error code (int32)
3336 */
3337 static int
3338 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3339 {
3340 nvlist_t *snaps;
3341 nvlist_t *props = NULL;
3342 int error, poollen;
3343 nvpair_t *pair;
3344
3345 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3346 if ((error = zfs_check_userprops(poolname, props)) != 0)
3347 return (error);
3348
3349 if (!nvlist_empty(props) &&
3350 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3351 return (SET_ERROR(ENOTSUP));
3352
3353 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3354 return (SET_ERROR(EINVAL));
3355 poollen = strlen(poolname);
3356 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3357 pair = nvlist_next_nvpair(snaps, pair)) {
3358 const char *name = nvpair_name(pair);
3359 const char *cp = strchr(name, '@');
3360
3361 /*
3362 * The snap name must contain an @, and the part after it must
3363 * contain only valid characters.
3364 */
3365 if (cp == NULL ||
3366 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3367 return (SET_ERROR(EINVAL));
3368
3369 /*
3370 * The snap must be in the specified pool.
3371 */
3372 if (strncmp(name, poolname, poollen) != 0 ||
3373 (name[poollen] != '/' && name[poollen] != '@'))
3374 return (SET_ERROR(EXDEV));
3375
3376 /* This must be the only snap of this fs. */
3377 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3378 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3379 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3380 == 0) {
3381 return (SET_ERROR(EXDEV));
3382 }
3383 }
3384 }
3385
3386 error = dsl_dataset_snapshot(snaps, props, outnvl);
3387 return (error);
3388 }
3389
3390 /*
3391 * innvl: "message" -> string
3392 */
3393 /* ARGSUSED */
3394 static int
3395 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3396 {
3397 char *message;
3398 spa_t *spa;
3399 int error;
3400 char *poolname;
3401
3402 /*
3403 * The poolname in the ioctl is not set, we get it from the TSD,
3404 * which was set at the end of the last successful ioctl that allows
3405 * logging. The secpolicy func already checked that it is set.
3406 * Only one log ioctl is allowed after each successful ioctl, so
3407 * we clear the TSD here.
3408 */
3409 poolname = tsd_get(zfs_allow_log_key);
3410 (void) tsd_set(zfs_allow_log_key, NULL);
3411 error = spa_open(poolname, &spa, FTAG);
3412 strfree(poolname);
3413 if (error != 0)
3414 return (error);
3415
3416 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3417 spa_close(spa, FTAG);
3418 return (SET_ERROR(EINVAL));
3419 }
3420
3421 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3422 spa_close(spa, FTAG);
3423 return (SET_ERROR(ENOTSUP));
3424 }
3425
3426 error = spa_history_log(spa, message);
3427 spa_close(spa, FTAG);
3428 return (error);
3429 }
3430
3431 /*
3432 * The dp_config_rwlock must not be held when calling this, because the
3433 * unmount may need to write out data.
3434 *
3435 * This function is best-effort. Callers must deal gracefully if it
3436 * remains mounted (or is remounted after this call).
3437 *
3438 * Returns 0 if the argument is not a snapshot, or it is not currently a
3439 * filesystem, or we were able to unmount it. Returns error code otherwise.
3440 */
3441 void
3442 zfs_unmount_snap(const char *snapname)
3443 {
3444 vfs_t *vfsp = NULL;
3445 zfsvfs_t *zfsvfs = NULL;
3446
3447 if (strchr(snapname, '@') == NULL)
3448 return;
3449
3450 int err = getzfsvfs(snapname, &zfsvfs);
3451 if (err != 0) {
3452 ASSERT3P(zfsvfs, ==, NULL);
3453 return;
3454 }
3455 vfsp = zfsvfs->z_vfs;
3456
3457 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3458
3459 err = vn_vfswlock(vfsp->vfs_vnodecovered);
3460 VFS_RELE(vfsp);
3461 if (err != 0)
3462 return;
3463
3464 /*
3465 * Always force the unmount for snapshots.
3466 */
3467 (void) dounmount(vfsp, MS_FORCE, kcred);
3468 }
3469
3470 /* ARGSUSED */
3471 static int
3472 zfs_unmount_snap_cb(const char *snapname, void *arg)
3473 {
3474 zfs_unmount_snap(snapname);
3475 return (0);
3476 }
3477
3478 /*
3479 * When a clone is destroyed, its origin may also need to be destroyed,
3480 * in which case it must be unmounted. This routine will do that unmount
3481 * if necessary.
3482 */
3483 void
3484 zfs_destroy_unmount_origin(const char *fsname)
3485 {
3486 int error;
3487 objset_t *os;
3488 dsl_dataset_t *ds;
3489
3490 error = dmu_objset_hold(fsname, FTAG, &os);
3491 if (error != 0)
3492 return;
3493 ds = dmu_objset_ds(os);
3494 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3495 char originname[ZFS_MAX_DATASET_NAME_LEN];
3496 dsl_dataset_name(ds->ds_prev, originname);
3497 dmu_objset_rele(os, FTAG);
3498 zfs_unmount_snap(originname);
3499 } else {
3500 dmu_objset_rele(os, FTAG);
3501 }
3502 }
3503
3504 /*
3505 * innvl: {
3506 * "snaps" -> { snapshot1, snapshot2 }
3507 * (optional boolean) "defer"
3508 * }
3509 *
3510 * outnvl: snapshot -> error code (int32)
3511 *
3512 */
3513 /* ARGSUSED */
3514 static int
3515 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3516 {
3517 nvlist_t *snaps;
3518 nvpair_t *pair;
3519 boolean_t defer;
3520
3521 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3522 return (SET_ERROR(EINVAL));
3523 defer = nvlist_exists(innvl, "defer");
3524
3525 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3526 pair = nvlist_next_nvpair(snaps, pair)) {
3527 zfs_unmount_snap(nvpair_name(pair));
3528 }
3529
3530 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3531 }
3532
3533 /*
3534 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>.
3535 * All bookmarks must be in the same pool.
3536 *
3537 * innvl: {
3538 * bookmark1 -> snapshot1, bookmark2 -> snapshot2
3539 * }
3540 *
3541 * outnvl: bookmark -> error code (int32)
3542 *
3543 */
3544 /* ARGSUSED */
3545 static int
3546 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3547 {
3548 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3549 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3550 char *snap_name;
3551
3552 /*
3553 * Verify the snapshot argument.
3554 */
3555 if (nvpair_value_string(pair, &snap_name) != 0)
3556 return (SET_ERROR(EINVAL));
3557
3558
3559 /* Verify that the keys (bookmarks) are unique */
3560 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair);
3561 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) {
3562 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0)
3563 return (SET_ERROR(EINVAL));
3564 }
3565 }
3566
3567 return (dsl_bookmark_create(innvl, outnvl));
3568 }
3569
3570 /*
3571 * innvl: {
3572 * property 1, property 2, ...
3573 * }
3574 *
3575 * outnvl: {
3576 * bookmark name 1 -> { property 1, property 2, ... },
3577 * bookmark name 2 -> { property 1, property 2, ... }
3578 * }
3579 *
3580 */
3581 static int
3582 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3583 {
3584 return (dsl_get_bookmarks(fsname, innvl, outnvl));
3585 }
3586
3587 /*
3588 * innvl: {
3589 * bookmark name 1, bookmark name 2
3590 * }
3591 *
3592 * outnvl: bookmark -> error code (int32)
3593 *
3594 */
3595 static int
3596 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl,
3597 nvlist_t *outnvl)
3598 {
3599 int error, poollen;
3600
3601 poollen = strlen(poolname);
3602 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3603 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3604 const char *name = nvpair_name(pair);
3605 const char *cp = strchr(name, '#');
3606
3607 /*
3608 * The bookmark name must contain an #, and the part after it
3609 * must contain only valid characters.
3610 */
3611 if (cp == NULL ||
3612 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3613 return (SET_ERROR(EINVAL));
3614
3615 /*
3616 * The bookmark must be in the specified pool.
3617 */
3618 if (strncmp(name, poolname, poollen) != 0 ||
3619 (name[poollen] != '/' && name[poollen] != '#'))
3620 return (SET_ERROR(EXDEV));
3621 }
3622
3623 error = dsl_bookmark_destroy(innvl, outnvl);
3624 return (error);
3625 }
3626
3627 static int
3628 zfs_ioc_channel_program(const char *poolname, nvlist_t *innvl,
3629 nvlist_t *outnvl)
3630 {
3631 char *program;
3632 uint64_t instrlimit, memlimit;
3633 boolean_t sync_flag;
3634 nvpair_t *nvarg = NULL;
3635
3636 if (0 != nvlist_lookup_string(innvl, ZCP_ARG_PROGRAM, &program)) {
3637 return (EINVAL);
3638 }
3639 if (0 != nvlist_lookup_boolean_value(innvl, ZCP_ARG_SYNC, &sync_flag)) {
3640 sync_flag = B_TRUE;
3641 }
3642 if (0 != nvlist_lookup_uint64(innvl, ZCP_ARG_INSTRLIMIT, &instrlimit)) {
3643 instrlimit = ZCP_DEFAULT_INSTRLIMIT;
3644 }
3645 if (0 != nvlist_lookup_uint64(innvl, ZCP_ARG_MEMLIMIT, &memlimit)) {
3646 memlimit = ZCP_DEFAULT_MEMLIMIT;
3647 }
3648 if (0 != nvlist_lookup_nvpair(innvl, ZCP_ARG_ARGLIST, &nvarg)) {
3649 return (EINVAL);
3650 }
3651
3652 if (instrlimit == 0 || instrlimit > zfs_lua_max_instrlimit)
3653 return (EINVAL);
3654 if (memlimit == 0 || memlimit > zfs_lua_max_memlimit)
3655 return (EINVAL);
3656
3657 return (zcp_eval(poolname, program, sync_flag, instrlimit, memlimit,
3658 nvarg, outnvl));
3659 }
3660
3661 /*
3662 * inputs:
3663 * zc_name name of dataset to destroy
3664 * zc_objset_type type of objset
3665 * zc_defer_destroy mark for deferred destroy
3666 *
3667 * outputs: none
3668 */
3669 static int
3670 zfs_ioc_destroy(zfs_cmd_t *zc)
3671 {
3672 int err;
3673
3674 if (zc->zc_objset_type == DMU_OST_ZFS)
3675 zfs_unmount_snap(zc->zc_name);
3676
3677 if (strchr(zc->zc_name, '@'))
3678 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3679 else
3680 err = dsl_destroy_head(zc->zc_name);
3681 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3682 (void) zvol_remove_minor(zc->zc_name);
3683 return (err);
3684 }
3685
3686 /*
3687 * fsname is name of dataset to rollback (to most recent snapshot)
3688 *
3689 * innvl may contain name of expected target snapshot
3690 *
3691 * outnvl: "target" -> name of most recent snapshot
3692 * }
3693 */
3694 /* ARGSUSED */
3695 static int
3696 zfs_ioc_rollback(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3697 {
3698 zfsvfs_t *zfsvfs;
3699 char *target = NULL;
3700 int error;
3701
3702 (void) nvlist_lookup_string(innvl, "target", &target);
3703 if (target != NULL) {
3704 const char *cp = strchr(target, '@');
3705
3706 /*
3707 * The snap name must contain an @, and the part after it must
3708 * contain only valid characters.
3709 */
3710 if (cp == NULL ||
3711 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3712 return (SET_ERROR(EINVAL));
3713 }
3714
3715 if (getzfsvfs(fsname, &zfsvfs) == 0) {
3716 dsl_dataset_t *ds;
3717
3718 ds = dmu_objset_ds(zfsvfs->z_os);
3719 error = zfs_suspend_fs(zfsvfs);
3720 if (error == 0) {
3721 int resume_err;
3722
3723 error = dsl_dataset_rollback(fsname, target, zfsvfs,
3724 outnvl);
3725 resume_err = zfs_resume_fs(zfsvfs, ds);
3726 error = error ? error : resume_err;
3727 }
3728 VFS_RELE(zfsvfs->z_vfs);
3729 } else {
3730 error = dsl_dataset_rollback(fsname, target, NULL, outnvl);
3731 }
3732 return (error);
3733 }
3734
3735 static int
3736 recursive_unmount(const char *fsname, void *arg)
3737 {
3738 const char *snapname = arg;
3739 char fullname[ZFS_MAX_DATASET_NAME_LEN];
3740
3741 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3742 zfs_unmount_snap(fullname);
3743
3744 return (0);
3745 }
3746
3747 /*
3748 * inputs:
3749 * zc_name old name of dataset
3750 * zc_value new name of dataset
3751 * zc_cookie recursive flag (only valid for snapshots)
3752 *
3753 * outputs: none
3754 */
3755 static int
3756 zfs_ioc_rename(zfs_cmd_t *zc)
3757 {
3758 boolean_t recursive = zc->zc_cookie & 1;
3759 char *at;
3760
3761 /* "zfs rename" from and to ...%recv datasets should both fail */
3762 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
3763 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3764 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0 ||
3765 dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3766 strchr(zc->zc_name, '%') || strchr(zc->zc_value, '%'))
3767 return (SET_ERROR(EINVAL));
3768
3769 at = strchr(zc->zc_name, '@');
3770 if (at != NULL) {
3771 /* snaps must be in same fs */
3772 int error;
3773
3774 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3775 return (SET_ERROR(EXDEV));
3776 *at = '\0';
3777 if (zc->zc_objset_type == DMU_OST_ZFS) {
3778 error = dmu_objset_find(zc->zc_name,
3779 recursive_unmount, at + 1,
3780 recursive ? DS_FIND_CHILDREN : 0);
3781 if (error != 0) {
3782 *at = '@';
3783 return (error);
3784 }
3785 }
3786 error = dsl_dataset_rename_snapshot(zc->zc_name,
3787 at + 1, strchr(zc->zc_value, '@') + 1, recursive);
3788 *at = '@';
3789
3790 return (error);
3791 } else {
3792 if (zc->zc_objset_type == DMU_OST_ZVOL)
3793 (void) zvol_remove_minor(zc->zc_name);
3794 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3795 }
3796 }
3797
3798 static int
3799 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3800 {
3801 const char *propname = nvpair_name(pair);
3802 boolean_t issnap = (strchr(dsname, '@') != NULL);
3803 zfs_prop_t prop = zfs_name_to_prop(propname);
3804 uint64_t intval;
3805 int err;
3806
3807 if (prop == ZPROP_INVAL) {
3808 if (zfs_prop_user(propname)) {
3809 if (err = zfs_secpolicy_write_perms(dsname,
3810 ZFS_DELEG_PERM_USERPROP, cr))
3811 return (err);
3812 return (0);
3813 }
3814
3815 if (!issnap && zfs_prop_userquota(propname)) {
3816 const char *perm = NULL;
3817 const char *uq_prefix =
3818 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3819 const char *gq_prefix =
3820 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3821
3822 if (strncmp(propname, uq_prefix,
3823 strlen(uq_prefix)) == 0) {
3824 perm = ZFS_DELEG_PERM_USERQUOTA;
3825 } else if (strncmp(propname, gq_prefix,
3826 strlen(gq_prefix)) == 0) {
3827 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3828 } else {
3829 /* USERUSED and GROUPUSED are read-only */
3830 return (SET_ERROR(EINVAL));
3831 }
3832
3833 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3834 return (err);
3835 return (0);
3836 }
3837
3838 return (SET_ERROR(EINVAL));
3839 }
3840
3841 if (issnap)
3842 return (SET_ERROR(EINVAL));
3843
3844 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3845 /*
3846 * dsl_prop_get_all_impl() returns properties in this
3847 * format.
3848 */
3849 nvlist_t *attrs;
3850 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3851 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3852 &pair) == 0);
3853 }
3854
3855 /*
3856 * Check that this value is valid for this pool version
3857 */
3858 switch (prop) {
3859 case ZFS_PROP_COMPRESSION:
3860 /*
3861 * If the user specified gzip compression, make sure
3862 * the SPA supports it. We ignore any errors here since
3863 * we'll catch them later.
3864 */
3865 if (nvpair_value_uint64(pair, &intval) == 0) {
3866 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3867 intval <= ZIO_COMPRESS_GZIP_9 &&
3868 zfs_earlier_version(dsname,
3869 SPA_VERSION_GZIP_COMPRESSION)) {
3870 return (SET_ERROR(ENOTSUP));
3871 }
3872
3873 if (intval == ZIO_COMPRESS_ZLE &&
3874 zfs_earlier_version(dsname,
3875 SPA_VERSION_ZLE_COMPRESSION))
3876 return (SET_ERROR(ENOTSUP));
3877
3878 if (intval == ZIO_COMPRESS_LZ4) {
3879 spa_t *spa;
3880
3881 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3882 return (err);
3883
3884 if (!spa_feature_is_enabled(spa,
3885 SPA_FEATURE_LZ4_COMPRESS)) {
3886 spa_close(spa, FTAG);
3887 return (SET_ERROR(ENOTSUP));
3888 }
3889 spa_close(spa, FTAG);
3890 }
3891
3892 /*
3893 * If this is a bootable dataset then
3894 * verify that the compression algorithm
3895 * is supported for booting. We must return
3896 * something other than ENOTSUP since it
3897 * implies a downrev pool version.
3898 */
3899 if (zfs_is_bootfs(dsname) &&
3900 !BOOTFS_COMPRESS_VALID(intval)) {
3901 return (SET_ERROR(ERANGE));
3902 }
3903 }
3904 break;
3905
3906 case ZFS_PROP_COPIES:
3907 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3908 return (SET_ERROR(ENOTSUP));
3909 break;
3910
3911 case ZFS_PROP_RECORDSIZE:
3912 /* Record sizes above 128k need the feature to be enabled */
3913 if (nvpair_value_uint64(pair, &intval) == 0 &&
3914 intval > SPA_OLD_MAXBLOCKSIZE) {
3915 spa_t *spa;
3916
3917 /*
3918 * We don't allow setting the property above 1MB,
3919 * unless the tunable has been changed.
3920 */
3921 if (intval > zfs_max_recordsize ||
3922 intval > SPA_MAXBLOCKSIZE)
3923 return (SET_ERROR(ERANGE));
3924
3925 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3926 return (err);
3927
3928 if (!spa_feature_is_enabled(spa,
3929 SPA_FEATURE_LARGE_BLOCKS)) {
3930 spa_close(spa, FTAG);
3931 return (SET_ERROR(ENOTSUP));
3932 }
3933 spa_close(spa, FTAG);
3934 }
3935 break;
3936
3937 case ZFS_PROP_SHARESMB:
3938 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3939 return (SET_ERROR(ENOTSUP));
3940 break;
3941
3942 case ZFS_PROP_ACLINHERIT:
3943 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3944 nvpair_value_uint64(pair, &intval) == 0) {
3945 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3946 zfs_earlier_version(dsname,
3947 SPA_VERSION_PASSTHROUGH_X))
3948 return (SET_ERROR(ENOTSUP));
3949 }
3950 break;
3951
3952 case ZFS_PROP_CHECKSUM:
3953 case ZFS_PROP_DEDUP:
3954 {
3955 spa_feature_t feature;
3956 spa_t *spa;
3957
3958 /* dedup feature version checks */
3959 if (prop == ZFS_PROP_DEDUP &&
3960 zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3961 return (SET_ERROR(ENOTSUP));
3962
3963 if (nvpair_value_uint64(pair, &intval) != 0)
3964 return (SET_ERROR(EINVAL));
3965
3966 /* check prop value is enabled in features */
3967 feature = zio_checksum_to_feature(intval & ZIO_CHECKSUM_MASK);
3968 if (feature == SPA_FEATURE_NONE)
3969 break;
3970
3971 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3972 return (err);
3973 /*
3974 * Salted checksums are not supported on root pools.
3975 */
3976 if (spa_bootfs(spa) != 0 &&
3977 intval < ZIO_CHECKSUM_FUNCTIONS &&
3978 (zio_checksum_table[intval].ci_flags &
3979 ZCHECKSUM_FLAG_SALTED)) {
3980 spa_close(spa, FTAG);
3981 return (SET_ERROR(ERANGE));
3982 }
3983 if (!spa_feature_is_enabled(spa, feature)) {
3984 spa_close(spa, FTAG);
3985 return (SET_ERROR(ENOTSUP));
3986 }
3987 spa_close(spa, FTAG);
3988 break;
3989 }
3990 }
3991
3992 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3993 }
3994
3995 /*
3996 * Checks for a race condition to make sure we don't increment a feature flag
3997 * multiple times.
3998 */
3999 static int
4000 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
4001 {
4002 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
4003 spa_feature_t *featurep = arg;
4004
4005 if (!spa_feature_is_active(spa, *featurep))
4006 return (0);
4007 else
4008 return (SET_ERROR(EBUSY));
4009 }
4010
4011 /*
4012 * The callback invoked on feature activation in the sync task caused by
4013 * zfs_prop_activate_feature.
4014 */
4015 static void
4016 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
4017 {
4018 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
4019 spa_feature_t *featurep = arg;
4020
4021 spa_feature_incr(spa, *featurep, tx);
4022 }
4023
4024 /*
4025 * Activates a feature on a pool in response to a property setting. This
4026 * creates a new sync task which modifies the pool to reflect the feature
4027 * as being active.
4028 */
4029 static int
4030 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature)
4031 {
4032 int err;
4033
4034 /* EBUSY here indicates that the feature is already active */
4035 err = dsl_sync_task(spa_name(spa),
4036 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
4037 &feature, 2, ZFS_SPACE_CHECK_RESERVED);
4038
4039 if (err != 0 && err != EBUSY)
4040 return (err);
4041 else
4042 return (0);
4043 }
4044
4045 /*
4046 * Removes properties from the given props list that fail permission checks
4047 * needed to clear them and to restore them in case of a receive error. For each
4048 * property, make sure we have both set and inherit permissions.
4049 *
4050 * Returns the first error encountered if any permission checks fail. If the
4051 * caller provides a non-NULL errlist, it also gives the complete list of names
4052 * of all the properties that failed a permission check along with the
4053 * corresponding error numbers. The caller is responsible for freeing the
4054 * returned errlist.
4055 *
4056 * If every property checks out successfully, zero is returned and the list
4057 * pointed at by errlist is NULL.
4058 */
4059 static int
4060 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
4061 {
4062 zfs_cmd_t *zc;
4063 nvpair_t *pair, *next_pair;
4064 nvlist_t *errors;
4065 int err, rv = 0;
4066
4067 if (props == NULL)
4068 return (0);
4069
4070 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4071
4072 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
4073 (void) strcpy(zc->zc_name, dataset);
4074 pair = nvlist_next_nvpair(props, NULL);
4075 while (pair != NULL) {
4076 next_pair = nvlist_next_nvpair(props, pair);
4077
4078 (void) strcpy(zc->zc_value, nvpair_name(pair));
4079 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
4080 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
4081 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
4082 VERIFY(nvlist_add_int32(errors,
4083 zc->zc_value, err) == 0);
4084 }
4085 pair = next_pair;
4086 }
4087 kmem_free(zc, sizeof (zfs_cmd_t));
4088
4089 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
4090 nvlist_free(errors);
4091 errors = NULL;
4092 } else {
4093 VERIFY(nvpair_value_int32(pair, &rv) == 0);
4094 }
4095
4096 if (errlist == NULL)
4097 nvlist_free(errors);
4098 else
4099 *errlist = errors;
4100
4101 return (rv);
4102 }
4103
4104 static boolean_t
4105 propval_equals(nvpair_t *p1, nvpair_t *p2)
4106 {
4107 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
4108 /* dsl_prop_get_all_impl() format */
4109 nvlist_t *attrs;
4110 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
4111 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
4112 &p1) == 0);
4113 }
4114
4115 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
4116 nvlist_t *attrs;
4117 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
4118 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
4119 &p2) == 0);
4120 }
4121
4122 if (nvpair_type(p1) != nvpair_type(p2))
4123 return (B_FALSE);
4124
4125 if (nvpair_type(p1) == DATA_TYPE_STRING) {
4126 char *valstr1, *valstr2;
4127
4128 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
4129 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
4130 return (strcmp(valstr1, valstr2) == 0);
4131 } else {
4132 uint64_t intval1, intval2;
4133
4134 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
4135 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
4136 return (intval1 == intval2);
4137 }
4138 }
4139
4140 /*
4141 * Remove properties from props if they are not going to change (as determined
4142 * by comparison with origprops). Remove them from origprops as well, since we
4143 * do not need to clear or restore properties that won't change.
4144 */
4145 static void
4146 props_reduce(nvlist_t *props, nvlist_t *origprops)
4147 {
4148 nvpair_t *pair, *next_pair;
4149
4150 if (origprops == NULL)
4151 return; /* all props need to be received */
4152
4153 pair = nvlist_next_nvpair(props, NULL);
4154 while (pair != NULL) {
4155 const char *propname = nvpair_name(pair);
4156 nvpair_t *match;
4157
4158 next_pair = nvlist_next_nvpair(props, pair);
4159
4160 if ((nvlist_lookup_nvpair(origprops, propname,
4161 &match) != 0) || !propval_equals(pair, match))
4162 goto next; /* need to set received value */
4163
4164 /* don't clear the existing received value */
4165 (void) nvlist_remove_nvpair(origprops, match);
4166 /* don't bother receiving the property */
4167 (void) nvlist_remove_nvpair(props, pair);
4168 next:
4169 pair = next_pair;
4170 }
4171 }
4172
4173 /*
4174 * Extract properties that cannot be set PRIOR to the receipt of a dataset.
4175 * For example, refquota cannot be set until after the receipt of a dataset,
4176 * because in replication streams, an older/earlier snapshot may exceed the
4177 * refquota. We want to receive the older/earlier snapshot, but setting
4178 * refquota pre-receipt will set the dsl's ACTUAL quota, which will prevent
4179 * the older/earlier snapshot from being received (with EDQUOT).
4180 *
4181 * The ZFS test "zfs_receive_011_pos" demonstrates such a scenario.
4182 *
4183 * libzfs will need to be judicious handling errors encountered by props
4184 * extracted by this function.
4185 */
4186 static nvlist_t *
4187 extract_delay_props(nvlist_t *props)
4188 {
4189 nvlist_t *delayprops;
4190 nvpair_t *nvp, *tmp;
4191 static const zfs_prop_t delayable[] = { ZFS_PROP_REFQUOTA, 0 };
4192 int i;
4193
4194 VERIFY(nvlist_alloc(&delayprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4195
4196 for (nvp = nvlist_next_nvpair(props, NULL); nvp != NULL;
4197 nvp = nvlist_next_nvpair(props, nvp)) {
4198 /*
4199 * strcmp() is safe because zfs_prop_to_name() always returns
4200 * a bounded string.
4201 */
4202 for (i = 0; delayable[i] != 0; i++) {
4203 if (strcmp(zfs_prop_to_name(delayable[i]),
4204 nvpair_name(nvp)) == 0) {
4205 break;
4206 }
4207 }
4208 if (delayable[i] != 0) {
4209 tmp = nvlist_prev_nvpair(props, nvp);
4210 VERIFY(nvlist_add_nvpair(delayprops, nvp) == 0);
4211 VERIFY(nvlist_remove_nvpair(props, nvp) == 0);
4212 nvp = tmp;
4213 }
4214 }
4215
4216 if (nvlist_empty(delayprops)) {
4217 nvlist_free(delayprops);
4218 delayprops = NULL;
4219 }
4220 return (delayprops);
4221 }
4222
4223 #ifdef DEBUG
4224 static boolean_t zfs_ioc_recv_inject_err;
4225 #endif
4226
4227 /*
4228 * inputs:
4229 * zc_name name of containing filesystem
4230 * zc_nvlist_src{_size} nvlist of properties to apply
4231 * zc_value name of snapshot to create
4232 * zc_string name of clone origin (if DRR_FLAG_CLONE)
4233 * zc_cookie file descriptor to recv from
4234 * zc_begin_record the BEGIN record of the stream (not byteswapped)
4235 * zc_guid force flag
4236 * zc_cleanup_fd cleanup-on-exit file descriptor
4237 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
4238 * zc_resumable if data is incomplete assume sender will resume
4239 *
4240 * outputs:
4241 * zc_cookie number of bytes read
4242 * zc_nvlist_dst{_size} error for each unapplied received property
4243 * zc_obj zprop_errflags_t
4244 * zc_action_handle handle for this guid/ds mapping
4245 */
4246 static int
4247 zfs_ioc_recv(zfs_cmd_t *zc)
4248 {
4249 file_t *fp;
4250 dmu_recv_cookie_t drc;
4251 boolean_t force = (boolean_t)zc->zc_guid;
4252 int fd;
4253 int error = 0;
4254 int props_error = 0;
4255 nvlist_t *errors;
4256 offset_t off;
4257 nvlist_t *props = NULL; /* sent properties */
4258 nvlist_t *origprops = NULL; /* existing properties */
4259 nvlist_t *delayprops = NULL; /* sent properties applied post-receive */
4260 char *origin = NULL;
4261 char *tosnap;
4262 char tofs[ZFS_MAX_DATASET_NAME_LEN];
4263 boolean_t first_recvd_props = B_FALSE;
4264
4265 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
4266 strchr(zc->zc_value, '@') == NULL ||
4267 strchr(zc->zc_value, '%'))
4268 return (SET_ERROR(EINVAL));
4269
4270 (void) strcpy(tofs, zc->zc_value);
4271 tosnap = strchr(tofs, '@');
4272 *tosnap++ = '\0';
4273
4274 if (zc->zc_nvlist_src != NULL &&
4275 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
4276 zc->zc_iflags, &props)) != 0)
4277 return (error);
4278
4279 fd = zc->zc_cookie;
4280 fp = getf(fd);
4281 if (fp == NULL) {
4282 nvlist_free(props);
4283 return (SET_ERROR(EBADF));
4284 }
4285
4286 errors = fnvlist_alloc();
4287
4288 if (zc->zc_string[0])
4289 origin = zc->zc_string;
4290
4291 error = dmu_recv_begin(tofs, tosnap,
4292 &zc->zc_begin_record, force, zc->zc_resumable, origin, &drc);
4293 if (error != 0)
4294 goto out;
4295
4296 /*
4297 * Set properties before we receive the stream so that they are applied
4298 * to the new data. Note that we must call dmu_recv_stream() if
4299 * dmu_recv_begin() succeeds.
4300 */
4301 if (props != NULL && !drc.drc_newfs) {
4302 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
4303 SPA_VERSION_RECVD_PROPS &&
4304 !dsl_prop_get_hasrecvd(tofs))
4305 first_recvd_props = B_TRUE;
4306
4307 /*
4308 * If new received properties are supplied, they are to
4309 * completely replace the existing received properties, so stash
4310 * away the existing ones.
4311 */
4312 if (dsl_prop_get_received(tofs, &origprops) == 0) {
4313 nvlist_t *errlist = NULL;
4314 /*
4315 * Don't bother writing a property if its value won't
4316 * change (and avoid the unnecessary security checks).
4317 *
4318 * The first receive after SPA_VERSION_RECVD_PROPS is a
4319 * special case where we blow away all local properties
4320 * regardless.
4321 */
4322 if (!first_recvd_props)
4323 props_reduce(props, origprops);
4324 if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
4325 (void) nvlist_merge(errors, errlist, 0);
4326 nvlist_free(errlist);
4327
4328 if (clear_received_props(tofs, origprops,
4329 first_recvd_props ? NULL : props) != 0)
4330 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4331 } else {
4332 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4333 }
4334 }
4335
4336 if (props != NULL) {
4337 props_error = dsl_prop_set_hasrecvd(tofs);
4338
4339 if (props_error == 0) {
4340 delayprops = extract_delay_props(props);
4341 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4342 props, errors);
4343 }
4344 }
4345
4346 off = fp->f_offset;
4347 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4348 &zc->zc_action_handle);
4349
4350 if (error == 0) {
4351 zfsvfs_t *zfsvfs = NULL;
4352
4353 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4354 /* online recv */
4355 dsl_dataset_t *ds;
4356 int end_err;
4357
4358 ds = dmu_objset_ds(zfsvfs->z_os);
4359 error = zfs_suspend_fs(zfsvfs);
4360 /*
4361 * If the suspend fails, then the recv_end will
4362 * likely also fail, and clean up after itself.
4363 */
4364 end_err = dmu_recv_end(&drc, zfsvfs);
4365 if (error == 0)
4366 error = zfs_resume_fs(zfsvfs, ds);
4367 error = error ? error : end_err;
4368 VFS_RELE(zfsvfs->z_vfs);
4369 } else {
4370 error = dmu_recv_end(&drc, NULL);
4371 }
4372
4373 /* Set delayed properties now, after we're done receiving. */
4374 if (delayprops != NULL && error == 0) {
4375 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4376 delayprops, errors);
4377 }
4378 }
4379
4380 if (delayprops != NULL) {
4381 /*
4382 * Merge delayed props back in with initial props, in case
4383 * we're DEBUG and zfs_ioc_recv_inject_err is set (which means
4384 * we have to make sure clear_received_props() includes
4385 * the delayed properties).
4386 *
4387 * Since zfs_ioc_recv_inject_err is only in DEBUG kernels,
4388 * using ASSERT() will be just like a VERIFY.
4389 */
4390 ASSERT(nvlist_merge(props, delayprops, 0) == 0);
4391 nvlist_free(delayprops);
4392 }
4393
4394 /*
4395 * Now that all props, initial and delayed, are set, report the prop
4396 * errors to the caller.
4397 */
4398 if (zc->zc_nvlist_dst_size != 0 &&
4399 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4400 put_nvlist(zc, errors) != 0)) {
4401 /*
4402 * Caller made zc->zc_nvlist_dst less than the minimum expected
4403 * size or supplied an invalid address.
4404 */
4405 props_error = SET_ERROR(EINVAL);
4406 }
4407
4408 zc->zc_cookie = off - fp->f_offset;
4409 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4410 fp->f_offset = off;
4411
4412 #ifdef DEBUG
4413 if (zfs_ioc_recv_inject_err) {
4414 zfs_ioc_recv_inject_err = B_FALSE;
4415 error = 1;
4416 }
4417 #endif
4418 /*
4419 * On error, restore the original props.
4420 */
4421 if (error != 0 && props != NULL && !drc.drc_newfs) {
4422 if (clear_received_props(tofs, props, NULL) != 0) {
4423 /*
4424 * We failed to clear the received properties.
4425 * Since we may have left a $recvd value on the
4426 * system, we can't clear the $hasrecvd flag.
4427 */
4428 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4429 } else if (first_recvd_props) {
4430 dsl_prop_unset_hasrecvd(tofs);
4431 }
4432
4433 if (origprops == NULL && !drc.drc_newfs) {
4434 /* We failed to stash the original properties. */
4435 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4436 }
4437
4438 /*
4439 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4440 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4441 * explictly if we're restoring local properties cleared in the
4442 * first new-style receive.
4443 */
4444 if (origprops != NULL &&
4445 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4446 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4447 origprops, NULL) != 0) {
4448 /*
4449 * We stashed the original properties but failed to
4450 * restore them.
4451 */
4452 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4453 }
4454 }
4455 out:
4456 nvlist_free(props);
4457 nvlist_free(origprops);
4458 nvlist_free(errors);
4459 releasef(fd);
4460
4461 if (error == 0)
4462 error = props_error;
4463
4464 return (error);
4465 }
4466
4467 /*
4468 * inputs:
4469 * zc_name name of snapshot to send
4470 * zc_cookie file descriptor to send stream to
4471 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4472 * zc_sendobj objsetid of snapshot to send
4473 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4474 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4475 * output size in zc_objset_type.
4476 * zc_flags lzc_send_flags
4477 *
4478 * outputs:
4479 * zc_objset_type estimated size, if zc_guid is set
4480 */
4481 static int
4482 zfs_ioc_send(zfs_cmd_t *zc)
4483 {
4484 int error;
4485 offset_t off;
4486 boolean_t estimate = (zc->zc_guid != 0);
4487 boolean_t embedok = (zc->zc_flags & 0x1);
4488 boolean_t large_block_ok = (zc->zc_flags & 0x2);
4489 boolean_t compressok = (zc->zc_flags & 0x4);
4490
4491 if (zc->zc_obj != 0) {
4492 dsl_pool_t *dp;
4493 dsl_dataset_t *tosnap;
4494
4495 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4496 if (error != 0)
4497 return (error);
4498
4499 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4500 if (error != 0) {
4501 dsl_pool_rele(dp, FTAG);
4502 return (error);
4503 }
4504
4505 if (dsl_dir_is_clone(tosnap->ds_dir))
4506 zc->zc_fromobj =
4507 dsl_dir_phys(tosnap->ds_dir)->dd_origin_obj;
4508 dsl_dataset_rele(tosnap, FTAG);
4509 dsl_pool_rele(dp, FTAG);
4510 }
4511
4512 if (estimate) {
4513 dsl_pool_t *dp;
4514 dsl_dataset_t *tosnap;
4515 dsl_dataset_t *fromsnap = NULL;
4516
4517 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4518 if (error != 0)
4519 return (error);
4520
4521 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4522 if (error != 0) {
4523 dsl_pool_rele(dp, FTAG);
4524 return (error);
4525 }
4526
4527 if (zc->zc_fromobj != 0) {
4528 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4529 FTAG, &fromsnap);
4530 if (error != 0) {
4531 dsl_dataset_rele(tosnap, FTAG);
4532 dsl_pool_rele(dp, FTAG);
4533 return (error);
4534 }
4535 }
4536
4537 error = dmu_send_estimate(tosnap, fromsnap, compressok,
4538 &zc->zc_objset_type);
4539
4540 if (fromsnap != NULL)
4541 dsl_dataset_rele(fromsnap, FTAG);
4542 dsl_dataset_rele(tosnap, FTAG);
4543 dsl_pool_rele(dp, FTAG);
4544 } else {
4545 file_t *fp = getf(zc->zc_cookie);
4546 if (fp == NULL)
4547 return (SET_ERROR(EBADF));
4548
4549 off = fp->f_offset;
4550 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4551 zc->zc_fromobj, embedok, large_block_ok, compressok,
4552 zc->zc_cookie, fp->f_vnode, &off);
4553
4554 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4555 fp->f_offset = off;
4556 releasef(zc->zc_cookie);
4557 }
4558 return (error);
4559 }
4560
4561 /*
4562 * inputs:
4563 * zc_name name of snapshot on which to report progress
4564 * zc_cookie file descriptor of send stream
4565 *
4566 * outputs:
4567 * zc_cookie number of bytes written in send stream thus far
4568 */
4569 static int
4570 zfs_ioc_send_progress(zfs_cmd_t *zc)
4571 {
4572 dsl_pool_t *dp;
4573 dsl_dataset_t *ds;
4574 dmu_sendarg_t *dsp = NULL;
4575 int error;
4576
4577 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4578 if (error != 0)
4579 return (error);
4580
4581 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4582 if (error != 0) {
4583 dsl_pool_rele(dp, FTAG);
4584 return (error);
4585 }
4586
4587 mutex_enter(&ds->ds_sendstream_lock);
4588
4589 /*
4590 * Iterate over all the send streams currently active on this dataset.
4591 * If there's one which matches the specified file descriptor _and_ the
4592 * stream was started by the current process, return the progress of
4593 * that stream.
4594 */
4595 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4596 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4597 if (dsp->dsa_outfd == zc->zc_cookie &&
4598 dsp->dsa_proc == curproc)
4599 break;
4600 }
4601
4602 if (dsp != NULL)
4603 zc->zc_cookie = *(dsp->dsa_off);
4604 else
4605 error = SET_ERROR(ENOENT);
4606
4607 mutex_exit(&ds->ds_sendstream_lock);
4608 dsl_dataset_rele(ds, FTAG);
4609 dsl_pool_rele(dp, FTAG);
4610 return (error);
4611 }
4612
4613 static int
4614 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4615 {
4616 int id, error;
4617
4618 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4619 &zc->zc_inject_record);
4620
4621 if (error == 0)
4622 zc->zc_guid = (uint64_t)id;
4623
4624 return (error);
4625 }
4626
4627 static int
4628 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4629 {
4630 return (zio_clear_fault((int)zc->zc_guid));
4631 }
4632
4633 static int
4634 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4635 {
4636 int id = (int)zc->zc_guid;
4637 int error;
4638
4639 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4640 &zc->zc_inject_record);
4641
4642 zc->zc_guid = id;
4643
4644 return (error);
4645 }
4646
4647 static int
4648 zfs_ioc_error_log(zfs_cmd_t *zc)
4649 {
4650 spa_t *spa;
4651 int error;
4652 size_t count = (size_t)zc->zc_nvlist_dst_size;
4653
4654 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4655 return (error);
4656
4657 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4658 &count);
4659 if (error == 0)
4660 zc->zc_nvlist_dst_size = count;
4661 else
4662 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4663
4664 spa_close(spa, FTAG);
4665
4666 return (error);
4667 }
4668
4669 static int
4670 zfs_ioc_clear(zfs_cmd_t *zc)
4671 {
4672 spa_t *spa;
4673 vdev_t *vd;
4674 int error;
4675
4676 /*
4677 * On zpool clear we also fix up missing slogs
4678 */
4679 mutex_enter(&spa_namespace_lock);
4680 spa = spa_lookup(zc->zc_name);
4681 if (spa == NULL) {
4682 mutex_exit(&spa_namespace_lock);
4683 return (SET_ERROR(EIO));
4684 }
4685 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4686 /* we need to let spa_open/spa_load clear the chains */
4687 spa_set_log_state(spa, SPA_LOG_CLEAR);
4688 }
4689 spa->spa_last_open_failed = 0;
4690 mutex_exit(&spa_namespace_lock);
4691
4692 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4693 error = spa_open(zc->zc_name, &spa, FTAG);
4694 } else {
4695 nvlist_t *policy;
4696 nvlist_t *config = NULL;
4697
4698 if (zc->zc_nvlist_src == NULL)
4699 return (SET_ERROR(EINVAL));
4700
4701 if ((error = get_nvlist(zc->zc_nvlist_src,
4702 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4703 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4704 policy, &config);
4705 if (config != NULL) {
4706 int err;
4707
4708 if ((err = put_nvlist(zc, config)) != 0)
4709 error = err;
4710 nvlist_free(config);
4711 }
4712 nvlist_free(policy);
4713 }
4714 }
4715
4716 if (error != 0)
4717 return (error);
4718
4719 spa_vdev_state_enter(spa, SCL_NONE);
4720
4721 if (zc->zc_guid == 0) {
4722 vd = NULL;
4723 } else {
4724 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4725 if (vd == NULL) {
4726 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4727 spa_close(spa, FTAG);
4728 return (SET_ERROR(ENODEV));
4729 }
4730 }
4731
4732 vdev_clear(spa, vd);
4733
4734 (void) spa_vdev_state_exit(spa, NULL, 0);
4735
4736 /*
4737 * Resume any suspended I/Os.
4738 */
4739 if (zio_resume(spa) != 0)
4740 error = SET_ERROR(EIO);
4741
4742 spa_close(spa, FTAG);
4743
4744 return (error);
4745 }
4746
4747 static int
4748 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4749 {
4750 spa_t *spa;
4751 int error;
4752
4753 error = spa_open(zc->zc_name, &spa, FTAG);
4754 if (error != 0)
4755 return (error);
4756
4757 spa_vdev_state_enter(spa, SCL_NONE);
4758
4759 /*
4760 * If a resilver is already in progress then set the
4761 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4762 * the scan as a side effect of the reopen. Otherwise, let
4763 * vdev_open() decided if a resilver is required.
4764 */
4765 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4766 vdev_reopen(spa->spa_root_vdev);
4767 spa->spa_scrub_reopen = B_FALSE;
4768
4769 (void) spa_vdev_state_exit(spa, NULL, 0);
4770 spa_close(spa, FTAG);
4771 return (0);
4772 }
4773 /*
4774 * inputs:
4775 * zc_name name of filesystem
4776 *
4777 * outputs:
4778 * zc_string name of conflicting snapshot, if there is one
4779 */
4780 static int
4781 zfs_ioc_promote(zfs_cmd_t *zc)
4782 {
4783 dsl_pool_t *dp;
4784 dsl_dataset_t *ds, *ods;
4785 char origin[ZFS_MAX_DATASET_NAME_LEN];
4786 char *cp;
4787 int error;
4788
4789 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
4790 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0 ||
4791 strchr(zc->zc_name, '%'))
4792 return (SET_ERROR(EINVAL));
4793
4794 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4795 if (error != 0)
4796 return (error);
4797
4798 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4799 if (error != 0) {
4800 dsl_pool_rele(dp, FTAG);
4801 return (error);
4802 }
4803
4804 if (!dsl_dir_is_clone(ds->ds_dir)) {
4805 dsl_dataset_rele(ds, FTAG);
4806 dsl_pool_rele(dp, FTAG);
4807 return (SET_ERROR(EINVAL));
4808 }
4809
4810 error = dsl_dataset_hold_obj(dp,
4811 dsl_dir_phys(ds->ds_dir)->dd_origin_obj, FTAG, &ods);
4812 if (error != 0) {
4813 dsl_dataset_rele(ds, FTAG);
4814 dsl_pool_rele(dp, FTAG);
4815 return (error);
4816 }
4817
4818 dsl_dataset_name(ods, origin);
4819 dsl_dataset_rele(ods, FTAG);
4820 dsl_dataset_rele(ds, FTAG);
4821 dsl_pool_rele(dp, FTAG);
4822
4823 /*
4824 * We don't need to unmount *all* the origin fs's snapshots, but
4825 * it's easier.
4826 */
4827 cp = strchr(origin, '@');
4828 if (cp)
4829 *cp = '\0';
4830 (void) dmu_objset_find(origin,
4831 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4832 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4833 }
4834
4835 /*
4836 * Retrieve a single {user|group}{used|quota}@... property.
4837 *
4838 * inputs:
4839 * zc_name name of filesystem
4840 * zc_objset_type zfs_userquota_prop_t
4841 * zc_value domain name (eg. "S-1-234-567-89")
4842 * zc_guid RID/UID/GID
4843 *
4844 * outputs:
4845 * zc_cookie property value
4846 */
4847 static int
4848 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4849 {
4850 zfsvfs_t *zfsvfs;
4851 int error;
4852
4853 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4854 return (SET_ERROR(EINVAL));
4855
4856 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4857 if (error != 0)
4858 return (error);
4859
4860 error = zfs_userspace_one(zfsvfs,
4861 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4862 zfsvfs_rele(zfsvfs, FTAG);
4863
4864 return (error);
4865 }
4866
4867 /*
4868 * inputs:
4869 * zc_name name of filesystem
4870 * zc_cookie zap cursor
4871 * zc_objset_type zfs_userquota_prop_t
4872 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4873 *
4874 * outputs:
4875 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4876 * zc_cookie zap cursor
4877 */
4878 static int
4879 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4880 {
4881 zfsvfs_t *zfsvfs;
4882 int bufsize = zc->zc_nvlist_dst_size;
4883
4884 if (bufsize <= 0)
4885 return (SET_ERROR(ENOMEM));
4886
4887 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4888 if (error != 0)
4889 return (error);
4890
4891 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4892
4893 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4894 buf, &zc->zc_nvlist_dst_size);
4895
4896 if (error == 0) {
4897 error = xcopyout(buf,
4898 (void *)(uintptr_t)zc->zc_nvlist_dst,
4899 zc->zc_nvlist_dst_size);
4900 }
4901 kmem_free(buf, bufsize);
4902 zfsvfs_rele(zfsvfs, FTAG);
4903
4904 return (error);
4905 }
4906
4907 /*
4908 * inputs:
4909 * zc_name name of filesystem
4910 *
4911 * outputs:
4912 * none
4913 */
4914 static int
4915 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4916 {
4917 objset_t *os;
4918 int error = 0;
4919 zfsvfs_t *zfsvfs;
4920
4921 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4922 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4923 /*
4924 * If userused is not enabled, it may be because the
4925 * objset needs to be closed & reopened (to grow the
4926 * objset_phys_t). Suspend/resume the fs will do that.
4927 */
4928 dsl_dataset_t *ds;
4929
4930 ds = dmu_objset_ds(zfsvfs->z_os);
4931 error = zfs_suspend_fs(zfsvfs);
4932 if (error == 0) {
4933 dmu_objset_refresh_ownership(zfsvfs->z_os,
4934 zfsvfs);
4935 error = zfs_resume_fs(zfsvfs, ds);
4936 }
4937 }
4938 if (error == 0)
4939 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4940 VFS_RELE(zfsvfs->z_vfs);
4941 } else {
4942 /* XXX kind of reading contents without owning */
4943 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4944 if (error != 0)
4945 return (error);
4946
4947 error = dmu_objset_userspace_upgrade(os);
4948 dmu_objset_rele(os, FTAG);
4949 }
4950
4951 return (error);
4952 }
4953
4954 /*
4955 * We don't want to have a hard dependency
4956 * against some special symbols in sharefs
4957 * nfs, and smbsrv. Determine them if needed when
4958 * the first file system is shared.
4959 * Neither sharefs, nfs or smbsrv are unloadable modules.
4960 */
4961 int (*znfsexport_fs)(void *arg);
4962 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4963 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4964
4965 int zfs_nfsshare_inited;
4966 int zfs_smbshare_inited;
4967
4968 ddi_modhandle_t nfs_mod;
4969 ddi_modhandle_t sharefs_mod;
4970 ddi_modhandle_t smbsrv_mod;
4971 kmutex_t zfs_share_lock;
4972
4973 static int
4974 zfs_init_sharefs()
4975 {
4976 int error;
4977
4978 ASSERT(MUTEX_HELD(&zfs_share_lock));
4979 /* Both NFS and SMB shares also require sharetab support. */
4980 if (sharefs_mod == NULL && ((sharefs_mod =
4981 ddi_modopen("fs/sharefs",
4982 KRTLD_MODE_FIRST, &error)) == NULL)) {
4983 return (SET_ERROR(ENOSYS));
4984 }
4985 if (zshare_fs == NULL && ((zshare_fs =
4986 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4987 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4988 return (SET_ERROR(ENOSYS));
4989 }
4990 return (0);
4991 }
4992
4993 static int
4994 zfs_ioc_share(zfs_cmd_t *zc)
4995 {
4996 int error;
4997 int opcode;
4998
4999 switch (zc->zc_share.z_sharetype) {
5000 case ZFS_SHARE_NFS:
5001 case ZFS_UNSHARE_NFS:
5002 if (zfs_nfsshare_inited == 0) {
5003 mutex_enter(&zfs_share_lock);
5004 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
5005 KRTLD_MODE_FIRST, &error)) == NULL)) {
5006 mutex_exit(&zfs_share_lock);
5007 return (SET_ERROR(ENOSYS));
5008 }
5009 if (znfsexport_fs == NULL &&
5010 ((znfsexport_fs = (int (*)(void *))
5011 ddi_modsym(nfs_mod,
5012 "nfs_export", &error)) == NULL)) {
5013 mutex_exit(&zfs_share_lock);
5014 return (SET_ERROR(ENOSYS));
5015 }
5016 error = zfs_init_sharefs();
5017 if (error != 0) {
5018 mutex_exit(&zfs_share_lock);
5019 return (SET_ERROR(ENOSYS));
5020 }
5021 zfs_nfsshare_inited = 1;
5022 mutex_exit(&zfs_share_lock);
5023 }
5024 break;
5025 case ZFS_SHARE_SMB:
5026 case ZFS_UNSHARE_SMB:
5027 if (zfs_smbshare_inited == 0) {
5028 mutex_enter(&zfs_share_lock);
5029 if (smbsrv_mod == NULL && ((smbsrv_mod =
5030 ddi_modopen("drv/smbsrv",
5031 KRTLD_MODE_FIRST, &error)) == NULL)) {
5032 mutex_exit(&zfs_share_lock);
5033 return (SET_ERROR(ENOSYS));
5034 }
5035 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
5036 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
5037 "smb_server_share", &error)) == NULL)) {
5038 mutex_exit(&zfs_share_lock);
5039 return (SET_ERROR(ENOSYS));
5040 }
5041 error = zfs_init_sharefs();
5042 if (error != 0) {
5043 mutex_exit(&zfs_share_lock);
5044 return (SET_ERROR(ENOSYS));
5045 }
5046 zfs_smbshare_inited = 1;
5047 mutex_exit(&zfs_share_lock);
5048 }
5049 break;
5050 default:
5051 return (SET_ERROR(EINVAL));
5052 }
5053
5054 switch (zc->zc_share.z_sharetype) {
5055 case ZFS_SHARE_NFS:
5056 case ZFS_UNSHARE_NFS:
5057 if (error =
5058 znfsexport_fs((void *)
5059 (uintptr_t)zc->zc_share.z_exportdata))
5060 return (error);
5061 break;
5062 case ZFS_SHARE_SMB:
5063 case ZFS_UNSHARE_SMB:
5064 if (error = zsmbexport_fs((void *)
5065 (uintptr_t)zc->zc_share.z_exportdata,
5066 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
5067 B_TRUE: B_FALSE)) {
5068 return (error);
5069 }
5070 break;
5071 }
5072
5073 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
5074 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
5075 SHAREFS_ADD : SHAREFS_REMOVE;
5076
5077 /*
5078 * Add or remove share from sharetab
5079 */
5080 error = zshare_fs(opcode,
5081 (void *)(uintptr_t)zc->zc_share.z_sharedata,
5082 zc->zc_share.z_sharemax);
5083
5084 return (error);
5085
5086 }
5087
5088 ace_t full_access[] = {
5089 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
5090 };
5091
5092 /*
5093 * inputs:
5094 * zc_name name of containing filesystem
5095 * zc_obj object # beyond which we want next in-use object #
5096 *
5097 * outputs:
5098 * zc_obj next in-use object #
5099 */
5100 static int
5101 zfs_ioc_next_obj(zfs_cmd_t *zc)
5102 {
5103 objset_t *os = NULL;
5104 int error;
5105
5106 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
5107 if (error != 0)
5108 return (error);
5109
5110 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
5111 dsl_dataset_phys(os->os_dsl_dataset)->ds_prev_snap_txg);
5112
5113 dmu_objset_rele(os, FTAG);
5114 return (error);
5115 }
5116
5117 /*
5118 * inputs:
5119 * zc_name name of filesystem
5120 * zc_value prefix name for snapshot
5121 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
5122 *
5123 * outputs:
5124 * zc_value short name of new snapshot
5125 */
5126 static int
5127 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
5128 {
5129 char *snap_name;
5130 char *hold_name;
5131 int error;
5132 minor_t minor;
5133
5134 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
5135 if (error != 0)
5136 return (error);
5137
5138 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
5139 (u_longlong_t)ddi_get_lbolt64());
5140 hold_name = kmem_asprintf("%%%s", zc->zc_value);
5141
5142 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
5143 hold_name);
5144 if (error == 0)
5145 (void) strcpy(zc->zc_value, snap_name);
5146 strfree(snap_name);
5147 strfree(hold_name);
5148 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
5149 return (error);
5150 }
5151
5152 /*
5153 * inputs:
5154 * zc_name name of "to" snapshot
5155 * zc_value name of "from" snapshot
5156 * zc_cookie file descriptor to write diff data on
5157 *
5158 * outputs:
5159 * dmu_diff_record_t's to the file descriptor
5160 */
5161 static int
5162 zfs_ioc_diff(zfs_cmd_t *zc)
5163 {
5164 file_t *fp;
5165 offset_t off;
5166 int error;
5167
5168 fp = getf(zc->zc_cookie);
5169 if (fp == NULL)
5170 return (SET_ERROR(EBADF));
5171
5172 off = fp->f_offset;
5173
5174 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
5175
5176 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5177 fp->f_offset = off;
5178 releasef(zc->zc_cookie);
5179
5180 return (error);
5181 }
5182
5183 /*
5184 * Remove all ACL files in shares dir
5185 */
5186 static int
5187 zfs_smb_acl_purge(znode_t *dzp)
5188 {
5189 zap_cursor_t zc;
5190 zap_attribute_t zap;
5191 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
5192 int error;
5193
5194 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
5195 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
5196 zap_cursor_advance(&zc)) {
5197 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
5198 NULL, 0)) != 0)
5199 break;
5200 }
5201 zap_cursor_fini(&zc);
5202 return (error);
5203 }
5204
5205 static int
5206 zfs_ioc_smb_acl(zfs_cmd_t *zc)
5207 {
5208 vnode_t *vp;
5209 znode_t *dzp;
5210 vnode_t *resourcevp = NULL;
5211 znode_t *sharedir;
5212 zfsvfs_t *zfsvfs;
5213 nvlist_t *nvlist;
5214 char *src, *target;
5215 vattr_t vattr;
5216 vsecattr_t vsec;
5217 int error = 0;
5218
5219 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
5220 NO_FOLLOW, NULL, &vp)) != 0)
5221 return (error);
5222
5223 /* Now make sure mntpnt and dataset are ZFS */
5224
5225 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
5226 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
5227 zc->zc_name) != 0)) {
5228 VN_RELE(vp);
5229 return (SET_ERROR(EINVAL));
5230 }
5231
5232 dzp = VTOZ(vp);
5233 zfsvfs = dzp->z_zfsvfs;
5234 ZFS_ENTER(zfsvfs);
5235
5236 /*
5237 * Create share dir if its missing.
5238 */
5239 mutex_enter(&zfsvfs->z_lock);
5240 if (zfsvfs->z_shares_dir == 0) {
5241 dmu_tx_t *tx;
5242
5243 tx = dmu_tx_create(zfsvfs->z_os);
5244 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
5245 ZFS_SHARES_DIR);
5246 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
5247 error = dmu_tx_assign(tx, TXG_WAIT);
5248 if (error != 0) {
5249 dmu_tx_abort(tx);
5250 } else {
5251 error = zfs_create_share_dir(zfsvfs, tx);
5252 dmu_tx_commit(tx);
5253 }
5254 if (error != 0) {
5255 mutex_exit(&zfsvfs->z_lock);
5256 VN_RELE(vp);
5257 ZFS_EXIT(zfsvfs);
5258 return (error);
5259 }
5260 }
5261 mutex_exit(&zfsvfs->z_lock);
5262
5263 ASSERT(zfsvfs->z_shares_dir);
5264 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
5265 VN_RELE(vp);
5266 ZFS_EXIT(zfsvfs);
5267 return (error);
5268 }
5269
5270 switch (zc->zc_cookie) {
5271 case ZFS_SMB_ACL_ADD:
5272 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
5273 vattr.va_type = VREG;
5274 vattr.va_mode = S_IFREG|0777;
5275 vattr.va_uid = 0;
5276 vattr.va_gid = 0;
5277
5278 vsec.vsa_mask = VSA_ACE;
5279 vsec.vsa_aclentp = &full_access;
5280 vsec.vsa_aclentsz = sizeof (full_access);
5281 vsec.vsa_aclcnt = 1;
5282
5283 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
5284 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
5285 if (resourcevp)
5286 VN_RELE(resourcevp);
5287 break;
5288
5289 case ZFS_SMB_ACL_REMOVE:
5290 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
5291 NULL, 0);
5292 break;
5293
5294 case ZFS_SMB_ACL_RENAME:
5295 if ((error = get_nvlist(zc->zc_nvlist_src,
5296 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
5297 VN_RELE(vp);
5298 VN_RELE(ZTOV(sharedir));
5299 ZFS_EXIT(zfsvfs);
5300 return (error);
5301 }
5302 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
5303 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
5304 &target)) {
5305 VN_RELE(vp);
5306 VN_RELE(ZTOV(sharedir));
5307 ZFS_EXIT(zfsvfs);
5308 nvlist_free(nvlist);
5309 return (error);
5310 }
5311 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
5312 kcred, NULL, 0);
5313 nvlist_free(nvlist);
5314 break;
5315
5316 case ZFS_SMB_ACL_PURGE:
5317 error = zfs_smb_acl_purge(sharedir);
5318 break;
5319
5320 default:
5321 error = SET_ERROR(EINVAL);
5322 break;
5323 }
5324
5325 VN_RELE(vp);
5326 VN_RELE(ZTOV(sharedir));
5327
5328 ZFS_EXIT(zfsvfs);
5329
5330 return (error);
5331 }
5332
5333 /*
5334 * innvl: {
5335 * "holds" -> { snapname -> holdname (string), ... }
5336 * (optional) "cleanup_fd" -> fd (int32)
5337 * }
5338 *
5339 * outnvl: {
5340 * snapname -> error value (int32)
5341 * ...
5342 * }
5343 */
5344 /* ARGSUSED */
5345 static int
5346 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
5347 {
5348 nvpair_t *pair;
5349 nvlist_t *holds;
5350 int cleanup_fd = -1;
5351 int error;
5352 minor_t minor = 0;
5353
5354 error = nvlist_lookup_nvlist(args, "holds", &holds);
5355 if (error != 0)
5356 return (SET_ERROR(EINVAL));
5357
5358 /* make sure the user didn't pass us any invalid (empty) tags */
5359 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
5360 pair = nvlist_next_nvpair(holds, pair)) {
5361 char *htag;
5362
5363 error = nvpair_value_string(pair, &htag);
5364 if (error != 0)
5365 return (SET_ERROR(error));
5366
5367 if (strlen(htag) == 0)
5368 return (SET_ERROR(EINVAL));
5369 }
5370
5371 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
5372 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
5373 if (error != 0)
5374 return (error);
5375 }
5376
5377 error = dsl_dataset_user_hold(holds, minor, errlist);
5378 if (minor != 0)
5379 zfs_onexit_fd_rele(cleanup_fd);
5380 return (error);
5381 }
5382
5383 /*
5384 * innvl is not used.
5385 *
5386 * outnvl: {
5387 * holdname -> time added (uint64 seconds since epoch)
5388 * ...
5389 * }
5390 */
5391 /* ARGSUSED */
5392 static int
5393 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
5394 {
5395 return (dsl_dataset_get_holds(snapname, outnvl));
5396 }
5397
5398 /*
5399 * innvl: {
5400 * snapname -> { holdname, ... }
5401 * ...
5402 * }
5403 *
5404 * outnvl: {
5405 * snapname -> error value (int32)
5406 * ...
5407 * }
5408 */
5409 /* ARGSUSED */
5410 static int
5411 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
5412 {
5413 return (dsl_dataset_user_release(holds, errlist));
5414 }
5415
5416 /*
5417 * inputs:
5418 * zc_name name of new filesystem or snapshot
5419 * zc_value full name of old snapshot
5420 *
5421 * outputs:
5422 * zc_cookie space in bytes
5423 * zc_objset_type compressed space in bytes
5424 * zc_perm_action uncompressed space in bytes
5425 */
5426 static int
5427 zfs_ioc_space_written(zfs_cmd_t *zc)
5428 {
5429 int error;
5430 dsl_pool_t *dp;
5431 dsl_dataset_t *new, *old;
5432
5433 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5434 if (error != 0)
5435 return (error);
5436 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5437 if (error != 0) {
5438 dsl_pool_rele(dp, FTAG);
5439 return (error);
5440 }
5441 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5442 if (error != 0) {
5443 dsl_dataset_rele(new, FTAG);
5444 dsl_pool_rele(dp, FTAG);
5445 return (error);
5446 }
5447
5448 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5449 &zc->zc_objset_type, &zc->zc_perm_action);
5450 dsl_dataset_rele(old, FTAG);
5451 dsl_dataset_rele(new, FTAG);
5452 dsl_pool_rele(dp, FTAG);
5453 return (error);
5454 }
5455
5456 /*
5457 * innvl: {
5458 * "firstsnap" -> snapshot name
5459 * }
5460 *
5461 * outnvl: {
5462 * "used" -> space in bytes
5463 * "compressed" -> compressed space in bytes
5464 * "uncompressed" -> uncompressed space in bytes
5465 * }
5466 */
5467 static int
5468 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5469 {
5470 int error;
5471 dsl_pool_t *dp;
5472 dsl_dataset_t *new, *old;
5473 char *firstsnap;
5474 uint64_t used, comp, uncomp;
5475
5476 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5477 return (SET_ERROR(EINVAL));
5478
5479 error = dsl_pool_hold(lastsnap, FTAG, &dp);
5480 if (error != 0)
5481 return (error);
5482
5483 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5484 if (error == 0 && !new->ds_is_snapshot) {
5485 dsl_dataset_rele(new, FTAG);
5486 error = SET_ERROR(EINVAL);
5487 }
5488 if (error != 0) {
5489 dsl_pool_rele(dp, FTAG);
5490 return (error);
5491 }
5492 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5493 if (error == 0 && !old->ds_is_snapshot) {
5494 dsl_dataset_rele(old, FTAG);
5495 error = SET_ERROR(EINVAL);
5496 }
5497 if (error != 0) {
5498 dsl_dataset_rele(new, FTAG);
5499 dsl_pool_rele(dp, FTAG);
5500 return (error);
5501 }
5502
5503 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5504 dsl_dataset_rele(old, FTAG);
5505 dsl_dataset_rele(new, FTAG);
5506 dsl_pool_rele(dp, FTAG);
5507 fnvlist_add_uint64(outnvl, "used", used);
5508 fnvlist_add_uint64(outnvl, "compressed", comp);
5509 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5510 return (error);
5511 }
5512
5513 /*
5514 * innvl: {
5515 * "fd" -> file descriptor to write stream to (int32)
5516 * (optional) "fromsnap" -> full snap name to send an incremental from
5517 * (optional) "largeblockok" -> (value ignored)
5518 * indicates that blocks > 128KB are permitted
5519 * (optional) "embedok" -> (value ignored)
5520 * presence indicates DRR_WRITE_EMBEDDED records are permitted
5521 * (optional) "compressok" -> (value ignored)
5522 * presence indicates compressed DRR_WRITE records are permitted
5523 * (optional) "resume_object" and "resume_offset" -> (uint64)
5524 * if present, resume send stream from specified object and offset.
5525 * }
5526 *
5527 * outnvl is unused
5528 */
5529 /* ARGSUSED */
5530 static int
5531 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5532 {
5533 int error;
5534 offset_t off;
5535 char *fromname = NULL;
5536 int fd;
5537 boolean_t largeblockok;
5538 boolean_t embedok;
5539 boolean_t compressok;
5540 uint64_t resumeobj = 0;
5541 uint64_t resumeoff = 0;
5542
5543 error = nvlist_lookup_int32(innvl, "fd", &fd);
5544 if (error != 0)
5545 return (SET_ERROR(EINVAL));
5546
5547 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5548
5549 largeblockok = nvlist_exists(innvl, "largeblockok");
5550 embedok = nvlist_exists(innvl, "embedok");
5551 compressok = nvlist_exists(innvl, "compressok");
5552
5553 (void) nvlist_lookup_uint64(innvl, "resume_object", &resumeobj);
5554 (void) nvlist_lookup_uint64(innvl, "resume_offset", &resumeoff);
5555
5556 file_t *fp = getf(fd);
5557 if (fp == NULL)
5558 return (SET_ERROR(EBADF));
5559
5560 off = fp->f_offset;
5561 error = dmu_send(snapname, fromname, embedok, largeblockok, compressok,
5562 fd, resumeobj, resumeoff, fp->f_vnode, &off);
5563
5564 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5565 fp->f_offset = off;
5566 releasef(fd);
5567 return (error);
5568 }
5569
5570 /*
5571 * Determine approximately how large a zfs send stream will be -- the number
5572 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5573 *
5574 * innvl: {
5575 * (optional) "from" -> full snap or bookmark name to send an incremental
5576 * from
5577 * (optional) "largeblockok" -> (value ignored)
5578 * indicates that blocks > 128KB are permitted
5579 * (optional) "embedok" -> (value ignored)
5580 * presence indicates DRR_WRITE_EMBEDDED records are permitted
5581 * (optional) "compressok" -> (value ignored)
5582 * presence indicates compressed DRR_WRITE records are permitted
5583 * }
5584 *
5585 * outnvl: {
5586 * "space" -> bytes of space (uint64)
5587 * }
5588 */
5589 static int
5590 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5591 {
5592 dsl_pool_t *dp;
5593 dsl_dataset_t *tosnap;
5594 int error;
5595 char *fromname;
5596 boolean_t compressok;
5597 uint64_t space;
5598
5599 error = dsl_pool_hold(snapname, FTAG, &dp);
5600 if (error != 0)
5601 return (error);
5602
5603 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5604 if (error != 0) {
5605 dsl_pool_rele(dp, FTAG);
5606 return (error);
5607 }
5608
5609 compressok = nvlist_exists(innvl, "compressok");
5610
5611 error = nvlist_lookup_string(innvl, "from", &fromname);
5612 if (error == 0) {
5613 if (strchr(fromname, '@') != NULL) {
5614 /*
5615 * If from is a snapshot, hold it and use the more
5616 * efficient dmu_send_estimate to estimate send space
5617 * size using deadlists.
5618 */
5619 dsl_dataset_t *fromsnap;
5620 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5621 if (error != 0)
5622 goto out;
5623 error = dmu_send_estimate(tosnap, fromsnap, compressok,
5624 &space);
5625 dsl_dataset_rele(fromsnap, FTAG);
5626 } else if (strchr(fromname, '#') != NULL) {
5627 /*
5628 * If from is a bookmark, fetch the creation TXG of the
5629 * snapshot it was created from and use that to find
5630 * blocks that were born after it.
5631 */
5632 zfs_bookmark_phys_t frombm;
5633
5634 error = dsl_bookmark_lookup(dp, fromname, tosnap,
5635 &frombm);
5636 if (error != 0)
5637 goto out;
5638 error = dmu_send_estimate_from_txg(tosnap,
5639 frombm.zbm_creation_txg, compressok, &space);
5640 } else {
5641 /*
5642 * from is not properly formatted as a snapshot or
5643 * bookmark
5644 */
5645 error = SET_ERROR(EINVAL);
5646 goto out;
5647 }
5648 } else {
5649 /*
5650 * If estimating the size of a full send, use dmu_send_estimate.
5651 */
5652 error = dmu_send_estimate(tosnap, NULL, compressok, &space);
5653 }
5654
5655 fnvlist_add_uint64(outnvl, "space", space);
5656
5657 out:
5658 dsl_dataset_rele(tosnap, FTAG);
5659 dsl_pool_rele(dp, FTAG);
5660 return (error);
5661 }
5662
5663 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5664
5665 static void
5666 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5667 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5668 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5669 {
5670 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5671
5672 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5673 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5674 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5675 ASSERT3P(vec->zvec_func, ==, NULL);
5676
5677 vec->zvec_legacy_func = func;
5678 vec->zvec_secpolicy = secpolicy;
5679 vec->zvec_namecheck = namecheck;
5680 vec->zvec_allow_log = log_history;
5681 vec->zvec_pool_check = pool_check;
5682 }
5683
5684 /*
5685 * See the block comment at the beginning of this file for details on
5686 * each argument to this function.
5687 */
5688 static void
5689 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5690 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5691 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5692 boolean_t allow_log)
5693 {
5694 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5695
5696 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5697 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5698 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5699 ASSERT3P(vec->zvec_func, ==, NULL);
5700
5701 /* if we are logging, the name must be valid */
5702 ASSERT(!allow_log || namecheck != NO_NAME);
5703
5704 vec->zvec_name = name;
5705 vec->zvec_func = func;
5706 vec->zvec_secpolicy = secpolicy;
5707 vec->zvec_namecheck = namecheck;
5708 vec->zvec_pool_check = pool_check;
5709 vec->zvec_smush_outnvlist = smush_outnvlist;
5710 vec->zvec_allow_log = allow_log;
5711 }
5712
5713 static void
5714 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5715 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5716 zfs_ioc_poolcheck_t pool_check)
5717 {
5718 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5719 POOL_NAME, log_history, pool_check);
5720 }
5721
5722 static void
5723 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5724 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5725 {
5726 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5727 DATASET_NAME, B_FALSE, pool_check);
5728 }
5729
5730 static void
5731 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5732 {
5733 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5734 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5735 }
5736
5737 static void
5738 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5739 zfs_secpolicy_func_t *secpolicy)
5740 {
5741 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5742 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5743 }
5744
5745 static void
5746 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5747 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5748 {
5749 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5750 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5751 }
5752
5753 static void
5754 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5755 {
5756 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5757 zfs_secpolicy_read);
5758 }
5759
5760 static void
5761 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5762 zfs_secpolicy_func_t *secpolicy)
5763 {
5764 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5765 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5766 }
5767
5768 static void
5769 zfs_ioctl_init(void)
5770 {
5771 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5772 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5773 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5774
5775 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5776 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5777 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5778
5779 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5780 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5781 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5782
5783 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5784 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5785 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5786
5787 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5788 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5789 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5790
5791 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5792 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5793 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5794
5795 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5796 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5797 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5798
5799 zfs_ioctl_register("remap", ZFS_IOC_REMAP,
5800 zfs_ioc_remap, zfs_secpolicy_remap, DATASET_NAME,
5801 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5802
5803 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5804 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5805 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5806
5807 zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5808 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5809 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5810 zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5811 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5812 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5813
5814 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5815 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5816 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5817
5818 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
5819 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
5820 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5821
5822 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK,
5823 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME,
5824 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5825
5826 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS,
5827 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME,
5828 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5829
5830 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS,
5831 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks,
5832 POOL_NAME,
5833 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5834
5835 zfs_ioctl_register("channel_program", ZFS_IOC_CHANNEL_PROGRAM,
5836 zfs_ioc_channel_program, zfs_secpolicy_config,
5837 POOL_NAME, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE,
5838 B_TRUE);
5839
5840 /* IOCTLS that use the legacy function signature */
5841
5842 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5843 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5844
5845 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5846 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5847 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5848 zfs_ioc_pool_scan);
5849 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5850 zfs_ioc_pool_upgrade);
5851 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5852 zfs_ioc_vdev_add);
5853 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5854 zfs_ioc_vdev_remove);
5855 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5856 zfs_ioc_vdev_set_state);
5857 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5858 zfs_ioc_vdev_attach);
5859 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5860 zfs_ioc_vdev_detach);
5861 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5862 zfs_ioc_vdev_setpath);
5863 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5864 zfs_ioc_vdev_setfru);
5865 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5866 zfs_ioc_pool_set_props);
5867 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5868 zfs_ioc_vdev_split);
5869 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5870 zfs_ioc_pool_reguid);
5871
5872 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5873 zfs_ioc_pool_configs, zfs_secpolicy_none);
5874 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5875 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5876 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5877 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5878 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5879 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5880 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5881 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5882
5883 /*
5884 * pool destroy, and export don't log the history as part of
5885 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5886 * does the logging of those commands.
5887 */
5888 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5889 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5890 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5891 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5892
5893 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5894 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5895 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5896 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5897
5898 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5899 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5900 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5901 zfs_ioc_dsobj_to_dsname,
5902 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5903 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5904 zfs_ioc_pool_get_history,
5905 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5906
5907 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5908 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5909
5910 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5911 zfs_secpolicy_config, B_TRUE, POOL_CHECK_READONLY);
5912 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5913 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5914
5915 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5916 zfs_ioc_space_written);
5917 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5918 zfs_ioc_objset_recvd_props);
5919 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5920 zfs_ioc_next_obj);
5921 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5922 zfs_ioc_get_fsacl);
5923 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5924 zfs_ioc_objset_stats);
5925 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5926 zfs_ioc_objset_zplprops);
5927 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5928 zfs_ioc_dataset_list_next);
5929 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5930 zfs_ioc_snapshot_list_next);
5931 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5932 zfs_ioc_send_progress);
5933
5934 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5935 zfs_ioc_diff, zfs_secpolicy_diff);
5936 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5937 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5938 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5939 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5940 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5941 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5942 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5943 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5944 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5945 zfs_ioc_send, zfs_secpolicy_send);
5946
5947 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5948 zfs_secpolicy_none);
5949 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5950 zfs_secpolicy_destroy);
5951 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5952 zfs_secpolicy_rename);
5953 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5954 zfs_secpolicy_recv);
5955 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5956 zfs_secpolicy_promote);
5957 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5958 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5959 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5960 zfs_secpolicy_set_fsacl);
5961
5962 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5963 zfs_secpolicy_share, POOL_CHECK_NONE);
5964 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5965 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5966 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5967 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5968 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5969 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5970 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5971 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5972 }
5973
5974 int
5975 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5976 zfs_ioc_poolcheck_t check)
5977 {
5978 spa_t *spa;
5979 int error;
5980
5981 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5982
5983 if (check & POOL_CHECK_NONE)
5984 return (0);
5985
5986 error = spa_open(name, &spa, FTAG);
5987 if (error == 0) {
5988 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5989 error = SET_ERROR(EAGAIN);
5990 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5991 error = SET_ERROR(EROFS);
5992 spa_close(spa, FTAG);
5993 }
5994 return (error);
5995 }
5996
5997 /*
5998 * Find a free minor number.
5999 */
6000 minor_t
6001 zfsdev_minor_alloc(void)
6002 {
6003 static minor_t last_minor;
6004 minor_t m;
6005
6006 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
6007
6008 for (m = last_minor + 1; m != last_minor; m++) {
6009 if (m > ZFSDEV_MAX_MINOR)
6010 m = 1;
6011 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
6012 last_minor = m;
6013 return (m);
6014 }
6015 }
6016
6017 return (0);
6018 }
6019
6020 static int
6021 zfs_ctldev_init(dev_t *devp)
6022 {
6023 minor_t minor;
6024 zfs_soft_state_t *zs;
6025
6026 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
6027 ASSERT(getminor(*devp) == 0);
6028
6029 minor = zfsdev_minor_alloc();
6030 if (minor == 0)
6031 return (SET_ERROR(ENXIO));
6032
6033 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
6034 return (SET_ERROR(EAGAIN));
6035
6036 *devp = makedevice(getemajor(*devp), minor);
6037
6038 zs = ddi_get_soft_state(zfsdev_state, minor);
6039 zs->zss_type = ZSST_CTLDEV;
6040 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
6041
6042 return (0);
6043 }
6044
6045 static void
6046 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
6047 {
6048 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
6049
6050 zfs_onexit_destroy(zo);
6051 ddi_soft_state_free(zfsdev_state, minor);
6052 }
6053
6054 void *
6055 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
6056 {
6057 zfs_soft_state_t *zp;
6058
6059 zp = ddi_get_soft_state(zfsdev_state, minor);
6060 if (zp == NULL || zp->zss_type != which)
6061 return (NULL);
6062
6063 return (zp->zss_data);
6064 }
6065
6066 static int
6067 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
6068 {
6069 int error = 0;
6070
6071 if (getminor(*devp) != 0)
6072 return (zvol_open(devp, flag, otyp, cr));
6073
6074 /* This is the control device. Allocate a new minor if requested. */
6075 if (flag & FEXCL) {
6076 mutex_enter(&zfsdev_state_lock);
6077 error = zfs_ctldev_init(devp);
6078 mutex_exit(&zfsdev_state_lock);
6079 }
6080
6081 return (error);
6082 }
6083
6084 static int
6085 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
6086 {
6087 zfs_onexit_t *zo;
6088 minor_t minor = getminor(dev);
6089
6090 if (minor == 0)
6091 return (0);
6092
6093 mutex_enter(&zfsdev_state_lock);
6094 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
6095 if (zo == NULL) {
6096 mutex_exit(&zfsdev_state_lock);
6097 return (zvol_close(dev, flag, otyp, cr));
6098 }
6099 zfs_ctldev_destroy(zo, minor);
6100 mutex_exit(&zfsdev_state_lock);
6101
6102 return (0);
6103 }
6104
6105 static int
6106 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
6107 {
6108 zfs_cmd_t *zc;
6109 uint_t vecnum;
6110 int error, rc, len;
6111 minor_t minor = getminor(dev);
6112 const zfs_ioc_vec_t *vec;
6113 char *saved_poolname = NULL;
6114 nvlist_t *innvl = NULL;
6115
6116 if (minor != 0 &&
6117 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
6118 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
6119
6120 vecnum = cmd - ZFS_IOC_FIRST;
6121 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
6122
6123 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
6124 return (SET_ERROR(EINVAL));
6125 vec = &zfs_ioc_vec[vecnum];
6126
6127 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
6128
6129 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
6130 if (error != 0) {
6131 error = SET_ERROR(EFAULT);
6132 goto out;
6133 }
6134
6135 zc->zc_iflags = flag & FKIOCTL;
6136 if (zc->zc_nvlist_src_size != 0) {
6137 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
6138 zc->zc_iflags, &innvl);
6139 if (error != 0)
6140 goto out;
6141 }
6142
6143 /*
6144 * Ensure that all pool/dataset names are valid before we pass down to
6145 * the lower layers.
6146 */
6147 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
6148 switch (vec->zvec_namecheck) {
6149 case POOL_NAME:
6150 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
6151 error = SET_ERROR(EINVAL);
6152 else
6153 error = pool_status_check(zc->zc_name,
6154 vec->zvec_namecheck, vec->zvec_pool_check);
6155 break;
6156
6157 case DATASET_NAME:
6158 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
6159 error = SET_ERROR(EINVAL);
6160 else
6161 error = pool_status_check(zc->zc_name,
6162 vec->zvec_namecheck, vec->zvec_pool_check);
6163 break;
6164
6165 case NO_NAME:
6166 break;
6167 }
6168
6169
6170 if (error == 0)
6171 error = vec->zvec_secpolicy(zc, innvl, cr);
6172
6173 if (error != 0)
6174 goto out;
6175
6176 /* legacy ioctls can modify zc_name */
6177 len = strcspn(zc->zc_name, "/@#") + 1;
6178 saved_poolname = kmem_alloc(len, KM_SLEEP);
6179 (void) strlcpy(saved_poolname, zc->zc_name, len);
6180
6181 if (vec->zvec_func != NULL) {
6182 nvlist_t *outnvl;
6183 int puterror = 0;
6184 spa_t *spa;
6185 nvlist_t *lognv = NULL;
6186
6187 ASSERT(vec->zvec_legacy_func == NULL);
6188
6189 /*
6190 * Add the innvl to the lognv before calling the func,
6191 * in case the func changes the innvl.
6192 */
6193 if (vec->zvec_allow_log) {
6194 lognv = fnvlist_alloc();
6195 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
6196 vec->zvec_name);
6197 if (!nvlist_empty(innvl)) {
6198 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
6199 innvl);
6200 }
6201 }
6202
6203 outnvl = fnvlist_alloc();
6204 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
6205
6206 /*
6207 * Some commands can partially execute, modfiy state, and still
6208 * return an error. In these cases, attempt to record what
6209 * was modified.
6210 */
6211 if ((error == 0 ||
6212 (cmd == ZFS_IOC_CHANNEL_PROGRAM && error != EINVAL)) &&
6213 vec->zvec_allow_log &&
6214 spa_open(zc->zc_name, &spa, FTAG) == 0) {
6215 if (!nvlist_empty(outnvl)) {
6216 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
6217 outnvl);
6218 }
6219 if (error != 0) {
6220 fnvlist_add_int64(lognv, ZPOOL_HIST_ERRNO,
6221 error);
6222 }
6223 (void) spa_history_log_nvl(spa, lognv);
6224 spa_close(spa, FTAG);
6225 }
6226 fnvlist_free(lognv);
6227
6228 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
6229 int smusherror = 0;
6230 if (vec->zvec_smush_outnvlist) {
6231 smusherror = nvlist_smush(outnvl,
6232 zc->zc_nvlist_dst_size);
6233 }
6234 if (smusherror == 0)
6235 puterror = put_nvlist(zc, outnvl);
6236 }
6237
6238 if (puterror != 0)
6239 error = puterror;
6240
6241 nvlist_free(outnvl);
6242 } else {
6243 error = vec->zvec_legacy_func(zc);
6244 }
6245
6246 out:
6247 nvlist_free(innvl);
6248 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
6249 if (error == 0 && rc != 0)
6250 error = SET_ERROR(EFAULT);
6251 if (error == 0 && vec->zvec_allow_log) {
6252 char *s = tsd_get(zfs_allow_log_key);
6253 if (s != NULL)
6254 strfree(s);
6255 (void) tsd_set(zfs_allow_log_key, saved_poolname);
6256 } else {
6257 if (saved_poolname != NULL)
6258 strfree(saved_poolname);
6259 }
6260
6261 kmem_free(zc, sizeof (zfs_cmd_t));
6262 return (error);
6263 }
6264
6265 static int
6266 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
6267 {
6268 if (cmd != DDI_ATTACH)
6269 return (DDI_FAILURE);
6270
6271 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
6272 DDI_PSEUDO, 0) == DDI_FAILURE)
6273 return (DDI_FAILURE);
6274
6275 zfs_dip = dip;
6276
6277 ddi_report_dev(dip);
6278
6279 return (DDI_SUCCESS);
6280 }
6281
6282 static int
6283 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
6284 {
6285 if (spa_busy() || zfs_busy() || zvol_busy())
6286 return (DDI_FAILURE);
6287
6288 if (cmd != DDI_DETACH)
6289 return (DDI_FAILURE);
6290
6291 zfs_dip = NULL;
6292
6293 ddi_prop_remove_all(dip);
6294 ddi_remove_minor_node(dip, NULL);
6295
6296 return (DDI_SUCCESS);
6297 }
6298
6299 /*ARGSUSED*/
6300 static int
6301 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
6302 {
6303 switch (infocmd) {
6304 case DDI_INFO_DEVT2DEVINFO:
6305 *result = zfs_dip;
6306 return (DDI_SUCCESS);
6307
6308 case DDI_INFO_DEVT2INSTANCE:
6309 *result = (void *)0;
6310 return (DDI_SUCCESS);
6311 }
6312
6313 return (DDI_FAILURE);
6314 }
6315
6316 /*
6317 * OK, so this is a little weird.
6318 *
6319 * /dev/zfs is the control node, i.e. minor 0.
6320 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
6321 *
6322 * /dev/zfs has basically nothing to do except serve up ioctls,
6323 * so most of the standard driver entry points are in zvol.c.
6324 */
6325 static struct cb_ops zfs_cb_ops = {
6326 zfsdev_open, /* open */
6327 zfsdev_close, /* close */
6328 zvol_strategy, /* strategy */
6329 nodev, /* print */
6330 zvol_dump, /* dump */
6331 zvol_read, /* read */
6332 zvol_write, /* write */
6333 zfsdev_ioctl, /* ioctl */
6334 nodev, /* devmap */
6335 nodev, /* mmap */
6336 nodev, /* segmap */
6337 nochpoll, /* poll */
6338 ddi_prop_op, /* prop_op */
6339 NULL, /* streamtab */
6340 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
6341 CB_REV, /* version */
6342 nodev, /* async read */
6343 nodev, /* async write */
6344 };
6345
6346 static struct dev_ops zfs_dev_ops = {
6347 DEVO_REV, /* version */
6348 0, /* refcnt */
6349 zfs_info, /* info */
6350 nulldev, /* identify */
6351 nulldev, /* probe */
6352 zfs_attach, /* attach */
6353 zfs_detach, /* detach */
6354 nodev, /* reset */
6355 &zfs_cb_ops, /* driver operations */
6356 NULL, /* no bus operations */
6357 NULL, /* power */
6358 ddi_quiesce_not_needed, /* quiesce */
6359 };
6360
6361 static struct modldrv zfs_modldrv = {
6362 &mod_driverops,
6363 "ZFS storage pool",
6364 &zfs_dev_ops
6365 };
6366
6367 static struct modlinkage modlinkage = {
6368 MODREV_1,
6369 (void *)&zfs_modlfs,
6370 (void *)&zfs_modldrv,
6371 NULL
6372 };
6373
6374 static void
6375 zfs_allow_log_destroy(void *arg)
6376 {
6377 char *poolname = arg;
6378 strfree(poolname);
6379 }
6380
6381 int
6382 _init(void)
6383 {
6384 int error;
6385
6386 spa_init(FREAD | FWRITE);
6387 zfs_init();
6388 zvol_init();
6389 zfs_ioctl_init();
6390
6391 if ((error = mod_install(&modlinkage)) != 0) {
6392 zvol_fini();
6393 zfs_fini();
6394 spa_fini();
6395 return (error);
6396 }
6397
6398 tsd_create(&zfs_fsyncer_key, NULL);
6399 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
6400 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
6401
6402 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
6403 ASSERT(error == 0);
6404 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
6405
6406 return (0);
6407 }
6408
6409 int
6410 _fini(void)
6411 {
6412 int error;
6413
6414 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
6415 return (SET_ERROR(EBUSY));
6416
6417 if ((error = mod_remove(&modlinkage)) != 0)
6418 return (error);
6419
6420 zvol_fini();
6421 zfs_fini();
6422 spa_fini();
6423 if (zfs_nfsshare_inited)
6424 (void) ddi_modclose(nfs_mod);
6425 if (zfs_smbshare_inited)
6426 (void) ddi_modclose(smbsrv_mod);
6427 if (zfs_nfsshare_inited || zfs_smbshare_inited)
6428 (void) ddi_modclose(sharefs_mod);
6429
6430 tsd_destroy(&zfs_fsyncer_key);
6431 ldi_ident_release(zfs_li);
6432 zfs_li = NULL;
6433 mutex_destroy(&zfs_share_lock);
6434
6435 return (error);
6436 }
6437
6438 int
6439 _info(struct modinfo *modinfop)
6440 {
6441 return (mod_info(&modlinkage, modinfop));
6442 }