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 * Portions Copyright 2011 Martin Matuska
25 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
27 * Copyright (c) 2013 by Delphix. All rights reserved.
28 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
29 * Copyright (c) 2013 Steven Hartland. All rights reserved.
30 */
31
32 /*
33 * ZFS ioctls.
34 *
35 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
36 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
37 *
38 * There are two ways that we handle ioctls: the legacy way where almost
39 * all of the logic is in the ioctl callback, and the new way where most
40 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
41 *
42 * Non-legacy ioctls should be registered by calling
43 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
44 * from userland by lzc_ioctl().
45 *
46 * The registration arguments are as follows:
47 *
48 * const char *name
49 * The name of the ioctl. This is used for history logging. If the
50 * ioctl returns successfully (the callback returns 0), and allow_log
51 * is true, then a history log entry will be recorded with the input &
52 * output nvlists. The log entry can be printed with "zpool history -i".
53 *
54 * zfs_ioc_t ioc
55 * The ioctl request number, which userland will pass to ioctl(2).
56 * The ioctl numbers can change from release to release, because
57 * the caller (libzfs) must be matched to the kernel.
58 *
59 * zfs_secpolicy_func_t *secpolicy
60 * This function will be called before the zfs_ioc_func_t, to
61 * determine if this operation is permitted. It should return EPERM
62 * on failure, and 0 on success. Checks include determining if the
63 * dataset is visible in this zone, and if the user has either all
64 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
65 * to do this operation on this dataset with "zfs allow".
66 *
67 * zfs_ioc_namecheck_t namecheck
68 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
69 * name, a dataset name, or nothing. If the name is not well-formed,
70 * the ioctl will fail and the callback will not be called.
71 * Therefore, the callback can assume that the name is well-formed
72 * (e.g. is null-terminated, doesn't have more than one '@' character,
73 * doesn't have invalid characters).
74 *
75 * zfs_ioc_poolcheck_t pool_check
76 * This specifies requirements on the pool state. If the pool does
77 * not meet them (is suspended or is readonly), the ioctl will fail
78 * and the callback will not be called. If any checks are specified
79 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
80 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
81 * POOL_CHECK_READONLY).
82 *
83 * boolean_t smush_outnvlist
84 * If smush_outnvlist is true, then the output is presumed to be a
85 * list of errors, and it will be "smushed" down to fit into the
86 * caller's buffer, by removing some entries and replacing them with a
87 * single "N_MORE_ERRORS" entry indicating how many were removed. See
88 * nvlist_smush() for details. If smush_outnvlist is false, and the
89 * outnvlist does not fit into the userland-provided buffer, then the
90 * ioctl will fail with ENOMEM.
91 *
92 * zfs_ioc_func_t *func
93 * The callback function that will perform the operation.
94 *
95 * The callback should return 0 on success, or an error number on
96 * failure. If the function fails, the userland ioctl will return -1,
97 * and errno will be set to the callback's return value. The callback
98 * will be called with the following arguments:
99 *
100 * const char *name
101 * The name of the pool or dataset to operate on, from
102 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
103 * expected type (pool, dataset, or none).
104 *
105 * nvlist_t *innvl
106 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
107 * NULL if no input nvlist was provided. Changes to this nvlist are
108 * ignored. If the input nvlist could not be deserialized, the
109 * ioctl will fail and the callback will not be called.
110 *
111 * nvlist_t *outnvl
112 * The output nvlist, initially empty. The callback can fill it in,
113 * and it will be returned to userland by serializing it into
114 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
115 * fails (e.g. because the caller didn't supply a large enough
116 * buffer), then the overall ioctl will fail. See the
117 * 'smush_nvlist' argument above for additional behaviors.
118 *
119 * There are two typical uses of the output nvlist:
120 * - To return state, e.g. property values. In this case,
121 * smush_outnvlist should be false. If the buffer was not large
122 * enough, the caller will reallocate a larger buffer and try
123 * the ioctl again.
124 *
125 * - To return multiple errors from an ioctl which makes on-disk
126 * changes. In this case, smush_outnvlist should be true.
127 * Ioctls which make on-disk modifications should generally not
128 * use the outnvl if they succeed, because the caller can not
129 * distinguish between the operation failing, and
130 * deserialization failing.
131 */
132
133 #include <sys/types.h>
134 #include <sys/param.h>
135 #include <sys/errno.h>
136 #include <sys/uio.h>
137 #include <sys/buf.h>
138 #include <sys/modctl.h>
139 #include <sys/open.h>
140 #include <sys/file.h>
141 #include <sys/kmem.h>
142 #include <sys/conf.h>
143 #include <sys/cmn_err.h>
144 #include <sys/stat.h>
145 #include <sys/zfs_ioctl.h>
146 #include <sys/zfs_vfsops.h>
147 #include <sys/zfs_znode.h>
148 #include <sys/zap.h>
149 #include <sys/spa.h>
150 #include <sys/spa_impl.h>
151 #include <sys/vdev.h>
152 #include <sys/priv_impl.h>
153 #include <sys/dmu.h>
154 #include <sys/dsl_dir.h>
155 #include <sys/dsl_dataset.h>
156 #include <sys/dsl_prop.h>
157 #include <sys/dsl_deleg.h>
158 #include <sys/dmu_objset.h>
159 #include <sys/dmu_impl.h>
160 #include <sys/dmu_tx.h>
161 #include <sys/ddi.h>
162 #include <sys/sunddi.h>
163 #include <sys/sunldi.h>
164 #include <sys/policy.h>
165 #include <sys/zone.h>
166 #include <sys/nvpair.h>
167 #include <sys/pathname.h>
168 #include <sys/mount.h>
169 #include <sys/sdt.h>
170 #include <sys/fs/zfs.h>
171 #include <sys/zfs_ctldir.h>
172 #include <sys/zfs_dir.h>
173 #include <sys/zfs_onexit.h>
174 #include <sys/zvol.h>
175 #include <sys/dsl_scan.h>
176 #include <sharefs/share.h>
177 #include <sys/dmu_objset.h>
178 #include <sys/dmu_send.h>
179 #include <sys/dsl_destroy.h>
180 #include <sys/dsl_userhold.h>
181 #include <sys/zfeature.h>
182
183 #include "zfs_namecheck.h"
184 #include "zfs_prop.h"
185 #include "zfs_deleg.h"
186 #include "zfs_comutil.h"
187
188 extern struct modlfs zfs_modlfs;
189
190 extern void zfs_init(void);
191 extern void zfs_fini(void);
192
193 ldi_ident_t zfs_li = NULL;
194 dev_info_t *zfs_dip;
195
196 uint_t zfs_fsyncer_key;
197 extern uint_t rrw_tsd_key;
198 static uint_t zfs_allow_log_key;
199
200 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
201 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
202 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
203
204 typedef enum {
205 NO_NAME,
206 POOL_NAME,
207 DATASET_NAME
208 } zfs_ioc_namecheck_t;
209
210 typedef enum {
211 POOL_CHECK_NONE = 1 << 0,
212 POOL_CHECK_SUSPENDED = 1 << 1,
213 POOL_CHECK_READONLY = 1 << 2,
214 } zfs_ioc_poolcheck_t;
215
216 typedef struct zfs_ioc_vec {
217 zfs_ioc_legacy_func_t *zvec_legacy_func;
218 zfs_ioc_func_t *zvec_func;
219 zfs_secpolicy_func_t *zvec_secpolicy;
220 zfs_ioc_namecheck_t zvec_namecheck;
221 boolean_t zvec_allow_log;
222 zfs_ioc_poolcheck_t zvec_pool_check;
223 boolean_t zvec_smush_outnvlist;
224 const char *zvec_name;
225 } zfs_ioc_vec_t;
226
227 /* This array is indexed by zfs_userquota_prop_t */
228 static const char *userquota_perms[] = {
229 ZFS_DELEG_PERM_USERUSED,
230 ZFS_DELEG_PERM_USERQUOTA,
231 ZFS_DELEG_PERM_GROUPUSED,
232 ZFS_DELEG_PERM_GROUPQUOTA,
233 };
234
235 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
236 static int zfs_check_settable(const char *name, nvpair_t *property,
237 cred_t *cr);
238 static int zfs_check_clearable(char *dataset, nvlist_t *props,
239 nvlist_t **errors);
240 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
241 boolean_t *);
242 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
243 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
244
245 static int zfs_prop_activate_feature(spa_t *spa, zfeature_info_t *feature);
246
247 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
248 void
249 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
250 {
251 const char *newfile;
252 char buf[512];
253 va_list adx;
254
255 /*
256 * Get rid of annoying "../common/" prefix to filename.
257 */
258 newfile = strrchr(file, '/');
259 if (newfile != NULL) {
260 newfile = newfile + 1; /* Get rid of leading / */
261 } else {
262 newfile = file;
263 }
264
265 va_start(adx, fmt);
266 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
267 va_end(adx);
268
269 /*
270 * To get this data, use the zfs-dprintf probe as so:
271 * dtrace -q -n 'zfs-dprintf \
272 * /stringof(arg0) == "dbuf.c"/ \
273 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
274 * arg0 = file name
275 * arg1 = function name
276 * arg2 = line number
277 * arg3 = message
278 */
279 DTRACE_PROBE4(zfs__dprintf,
280 char *, newfile, char *, func, int, line, char *, buf);
281 }
282
283 static void
284 history_str_free(char *buf)
285 {
286 kmem_free(buf, HIS_MAX_RECORD_LEN);
287 }
288
289 static char *
290 history_str_get(zfs_cmd_t *zc)
291 {
292 char *buf;
293
294 if (zc->zc_history == NULL)
295 return (NULL);
296
297 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
298 if (copyinstr((void *)(uintptr_t)zc->zc_history,
299 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
300 history_str_free(buf);
301 return (NULL);
302 }
303
304 buf[HIS_MAX_RECORD_LEN -1] = '\0';
305
306 return (buf);
307 }
308
309 /*
310 * Check to see if the named dataset is currently defined as bootable
311 */
312 static boolean_t
313 zfs_is_bootfs(const char *name)
314 {
315 objset_t *os;
316
317 if (dmu_objset_hold(name, FTAG, &os) == 0) {
318 boolean_t ret;
319 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
320 dmu_objset_rele(os, FTAG);
321 return (ret);
322 }
323 return (B_FALSE);
324 }
325
326 /*
327 * Return non-zero if the spa version is less than requested version.
328 */
329 static int
330 zfs_earlier_version(const char *name, int version)
331 {
332 spa_t *spa;
333
334 if (spa_open(name, &spa, FTAG) == 0) {
335 if (spa_version(spa) < version) {
336 spa_close(spa, FTAG);
337 return (1);
338 }
339 spa_close(spa, FTAG);
340 }
341 return (0);
342 }
343
344 /*
345 * Return TRUE if the ZPL version is less than requested version.
346 */
347 static boolean_t
348 zpl_earlier_version(const char *name, int version)
349 {
350 objset_t *os;
351 boolean_t rc = B_TRUE;
352
353 if (dmu_objset_hold(name, FTAG, &os) == 0) {
354 uint64_t zplversion;
355
356 if (dmu_objset_type(os) != DMU_OST_ZFS) {
357 dmu_objset_rele(os, FTAG);
358 return (B_TRUE);
359 }
360 /* XXX reading from non-owned objset */
361 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
362 rc = zplversion < version;
363 dmu_objset_rele(os, FTAG);
364 }
365 return (rc);
366 }
367
368 static void
369 zfs_log_history(zfs_cmd_t *zc)
370 {
371 spa_t *spa;
372 char *buf;
373
374 if ((buf = history_str_get(zc)) == NULL)
375 return;
376
377 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
378 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
379 (void) spa_history_log(spa, buf);
380 spa_close(spa, FTAG);
381 }
382 history_str_free(buf);
383 }
384
385 /*
386 * Policy for top-level read operations (list pools). Requires no privileges,
387 * and can be used in the local zone, as there is no associated dataset.
388 */
389 /* ARGSUSED */
390 static int
391 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
392 {
393 return (0);
394 }
395
396 /*
397 * Policy for dataset read operations (list children, get statistics). Requires
398 * no privileges, but must be visible in the local zone.
399 */
400 /* ARGSUSED */
401 static int
402 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
403 {
404 if (INGLOBALZONE(curproc) ||
405 zone_dataset_visible(zc->zc_name, NULL))
406 return (0);
407
408 return (SET_ERROR(ENOENT));
409 }
410
411 static int
412 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
413 {
414 int writable = 1;
415
416 /*
417 * The dataset must be visible by this zone -- check this first
418 * so they don't see EPERM on something they shouldn't know about.
419 */
420 if (!INGLOBALZONE(curproc) &&
421 !zone_dataset_visible(dataset, &writable))
422 return (SET_ERROR(ENOENT));
423
424 if (INGLOBALZONE(curproc)) {
425 /*
426 * If the fs is zoned, only root can access it from the
427 * global zone.
428 */
429 if (secpolicy_zfs(cr) && zoned)
430 return (SET_ERROR(EPERM));
431 } else {
432 /*
433 * If we are in a local zone, the 'zoned' property must be set.
434 */
435 if (!zoned)
436 return (SET_ERROR(EPERM));
437
438 /* must be writable by this zone */
439 if (!writable)
440 return (SET_ERROR(EPERM));
441 }
442 return (0);
443 }
444
445 static int
446 zfs_dozonecheck(const char *dataset, cred_t *cr)
447 {
448 uint64_t zoned;
449
450 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
451 return (SET_ERROR(ENOENT));
452
453 return (zfs_dozonecheck_impl(dataset, zoned, cr));
454 }
455
456 static int
457 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
458 {
459 uint64_t zoned;
460
461 if (dsl_prop_get_int_ds(ds, "zoned", &zoned))
462 return (SET_ERROR(ENOENT));
463
464 return (zfs_dozonecheck_impl(dataset, zoned, cr));
465 }
466
467 static int
468 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
469 const char *perm, cred_t *cr)
470 {
471 int error;
472
473 error = zfs_dozonecheck_ds(name, ds, cr);
474 if (error == 0) {
475 error = secpolicy_zfs(cr);
476 if (error != 0)
477 error = dsl_deleg_access_impl(ds, perm, cr);
478 }
479 return (error);
480 }
481
482 static int
483 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
484 {
485 int error;
486 dsl_dataset_t *ds;
487 dsl_pool_t *dp;
488
489 error = dsl_pool_hold(name, FTAG, &dp);
490 if (error != 0)
491 return (error);
492
493 error = dsl_dataset_hold(dp, name, FTAG, &ds);
494 if (error != 0) {
495 dsl_pool_rele(dp, FTAG);
496 return (error);
497 }
498
499 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr);
500
501 dsl_dataset_rele(ds, FTAG);
502 dsl_pool_rele(dp, FTAG);
503 return (error);
504 }
505
506 /*
507 * Policy for setting the security label property.
508 *
509 * Returns 0 for success, non-zero for access and other errors.
510 */
511 static int
512 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
513 {
514 char ds_hexsl[MAXNAMELEN];
515 bslabel_t ds_sl, new_sl;
516 boolean_t new_default = FALSE;
517 uint64_t zoned;
518 int needed_priv = -1;
519 int error;
520
521 /* First get the existing dataset label. */
522 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
523 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
524 if (error != 0)
525 return (SET_ERROR(EPERM));
526
527 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
528 new_default = TRUE;
529
530 /* The label must be translatable */
531 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
532 return (SET_ERROR(EINVAL));
533
534 /*
535 * In a non-global zone, disallow attempts to set a label that
536 * doesn't match that of the zone; otherwise no other checks
537 * are needed.
538 */
539 if (!INGLOBALZONE(curproc)) {
540 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
541 return (SET_ERROR(EPERM));
542 return (0);
543 }
544
545 /*
546 * For global-zone datasets (i.e., those whose zoned property is
547 * "off", verify that the specified new label is valid for the
548 * global zone.
549 */
550 if (dsl_prop_get_integer(name,
551 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
552 return (SET_ERROR(EPERM));
553 if (!zoned) {
554 if (zfs_check_global_label(name, strval) != 0)
555 return (SET_ERROR(EPERM));
556 }
557
558 /*
559 * If the existing dataset label is nondefault, check if the
560 * dataset is mounted (label cannot be changed while mounted).
561 * Get the zfsvfs; if there isn't one, then the dataset isn't
562 * mounted (or isn't a dataset, doesn't exist, ...).
563 */
564 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
565 objset_t *os;
566 static char *setsl_tag = "setsl_tag";
567
568 /*
569 * Try to own the dataset; abort if there is any error,
570 * (e.g., already mounted, in use, or other error).
571 */
572 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
573 setsl_tag, &os);
574 if (error != 0)
575 return (SET_ERROR(EPERM));
576
577 dmu_objset_disown(os, setsl_tag);
578
579 if (new_default) {
580 needed_priv = PRIV_FILE_DOWNGRADE_SL;
581 goto out_check;
582 }
583
584 if (hexstr_to_label(strval, &new_sl) != 0)
585 return (SET_ERROR(EPERM));
586
587 if (blstrictdom(&ds_sl, &new_sl))
588 needed_priv = PRIV_FILE_DOWNGRADE_SL;
589 else if (blstrictdom(&new_sl, &ds_sl))
590 needed_priv = PRIV_FILE_UPGRADE_SL;
591 } else {
592 /* dataset currently has a default label */
593 if (!new_default)
594 needed_priv = PRIV_FILE_UPGRADE_SL;
595 }
596
597 out_check:
598 if (needed_priv != -1)
599 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
600 return (0);
601 }
602
603 static int
604 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
605 cred_t *cr)
606 {
607 char *strval;
608
609 /*
610 * Check permissions for special properties.
611 */
612 switch (prop) {
613 case ZFS_PROP_ZONED:
614 /*
615 * Disallow setting of 'zoned' from within a local zone.
616 */
617 if (!INGLOBALZONE(curproc))
618 return (SET_ERROR(EPERM));
619 break;
620
621 case ZFS_PROP_QUOTA:
622 if (!INGLOBALZONE(curproc)) {
623 uint64_t zoned;
624 char setpoint[MAXNAMELEN];
625 /*
626 * Unprivileged users are allowed to modify the
627 * quota on things *under* (ie. contained by)
628 * the thing they own.
629 */
630 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
631 setpoint))
632 return (SET_ERROR(EPERM));
633 if (!zoned || strlen(dsname) <= strlen(setpoint))
634 return (SET_ERROR(EPERM));
635 }
636 break;
637
638 case ZFS_PROP_MLSLABEL:
639 if (!is_system_labeled())
640 return (SET_ERROR(EPERM));
641
642 if (nvpair_value_string(propval, &strval) == 0) {
643 int err;
644
645 err = zfs_set_slabel_policy(dsname, strval, CRED());
646 if (err != 0)
647 return (err);
648 }
649 break;
650 }
651
652 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
653 }
654
655 /* ARGSUSED */
656 static int
657 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
658 {
659 int error;
660
661 error = zfs_dozonecheck(zc->zc_name, cr);
662 if (error != 0)
663 return (error);
664
665 /*
666 * permission to set permissions will be evaluated later in
667 * dsl_deleg_can_allow()
668 */
669 return (0);
670 }
671
672 /* ARGSUSED */
673 static int
674 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
675 {
676 return (zfs_secpolicy_write_perms(zc->zc_name,
677 ZFS_DELEG_PERM_ROLLBACK, cr));
678 }
679
680 /* ARGSUSED */
681 static int
682 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
683 {
684 dsl_pool_t *dp;
685 dsl_dataset_t *ds;
686 char *cp;
687 int error;
688
689 /*
690 * Generate the current snapshot name from the given objsetid, then
691 * use that name for the secpolicy/zone checks.
692 */
693 cp = strchr(zc->zc_name, '@');
694 if (cp == NULL)
695 return (SET_ERROR(EINVAL));
696 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
697 if (error != 0)
698 return (error);
699
700 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
701 if (error != 0) {
702 dsl_pool_rele(dp, FTAG);
703 return (error);
704 }
705
706 dsl_dataset_name(ds, zc->zc_name);
707
708 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
709 ZFS_DELEG_PERM_SEND, cr);
710 dsl_dataset_rele(ds, FTAG);
711 dsl_pool_rele(dp, FTAG);
712
713 return (error);
714 }
715
716 /* ARGSUSED */
717 static int
718 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
719 {
720 return (zfs_secpolicy_write_perms(zc->zc_name,
721 ZFS_DELEG_PERM_SEND, cr));
722 }
723
724 /* ARGSUSED */
725 static int
726 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
727 {
728 vnode_t *vp;
729 int error;
730
731 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
732 NO_FOLLOW, NULL, &vp)) != 0)
733 return (error);
734
735 /* Now make sure mntpnt and dataset are ZFS */
736
737 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
738 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
739 zc->zc_name) != 0)) {
740 VN_RELE(vp);
741 return (SET_ERROR(EPERM));
742 }
743
744 VN_RELE(vp);
745 return (dsl_deleg_access(zc->zc_name,
746 ZFS_DELEG_PERM_SHARE, cr));
747 }
748
749 int
750 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
751 {
752 if (!INGLOBALZONE(curproc))
753 return (SET_ERROR(EPERM));
754
755 if (secpolicy_nfs(cr) == 0) {
756 return (0);
757 } else {
758 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
759 }
760 }
761
762 int
763 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
764 {
765 if (!INGLOBALZONE(curproc))
766 return (SET_ERROR(EPERM));
767
768 if (secpolicy_smb(cr) == 0) {
769 return (0);
770 } else {
771 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
772 }
773 }
774
775 static int
776 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
777 {
778 char *cp;
779
780 /*
781 * Remove the @bla or /bla from the end of the name to get the parent.
782 */
783 (void) strncpy(parent, datasetname, parentsize);
784 cp = strrchr(parent, '@');
785 if (cp != NULL) {
786 cp[0] = '\0';
787 } else {
788 cp = strrchr(parent, '/');
789 if (cp == NULL)
790 return (SET_ERROR(ENOENT));
791 cp[0] = '\0';
792 }
793
794 return (0);
795 }
796
797 int
798 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
799 {
800 int error;
801
802 if ((error = zfs_secpolicy_write_perms(name,
803 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
804 return (error);
805
806 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
807 }
808
809 /* ARGSUSED */
810 static int
811 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
812 {
813 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
814 }
815
816 /*
817 * Destroying snapshots with delegated permissions requires
818 * descendant mount and destroy permissions.
819 */
820 /* ARGSUSED */
821 static int
822 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
823 {
824 nvlist_t *snaps;
825 nvpair_t *pair, *nextpair;
826 int error = 0;
827
828 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
829 return (SET_ERROR(EINVAL));
830 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
831 pair = nextpair) {
832 dsl_pool_t *dp;
833 dsl_dataset_t *ds;
834
835 error = dsl_pool_hold(nvpair_name(pair), FTAG, &dp);
836 if (error != 0)
837 break;
838 nextpair = nvlist_next_nvpair(snaps, pair);
839 error = dsl_dataset_hold(dp, nvpair_name(pair), FTAG, &ds);
840 if (error == 0)
841 dsl_dataset_rele(ds, FTAG);
842 dsl_pool_rele(dp, FTAG);
843
844 if (error == 0) {
845 error = zfs_secpolicy_destroy_perms(nvpair_name(pair),
846 cr);
847 } else if (error == ENOENT) {
848 /*
849 * Ignore any snapshots that don't exist (we consider
850 * them "already destroyed"). Remove the name from the
851 * nvl here in case the snapshot is created between
852 * now and when we try to destroy it (in which case
853 * we don't want to destroy it since we haven't
854 * checked for permission).
855 */
856 fnvlist_remove_nvpair(snaps, pair);
857 error = 0;
858 }
859 if (error != 0)
860 break;
861 }
862
863 return (error);
864 }
865
866 int
867 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
868 {
869 char parentname[MAXNAMELEN];
870 int error;
871
872 if ((error = zfs_secpolicy_write_perms(from,
873 ZFS_DELEG_PERM_RENAME, cr)) != 0)
874 return (error);
875
876 if ((error = zfs_secpolicy_write_perms(from,
877 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
878 return (error);
879
880 if ((error = zfs_get_parent(to, parentname,
881 sizeof (parentname))) != 0)
882 return (error);
883
884 if ((error = zfs_secpolicy_write_perms(parentname,
885 ZFS_DELEG_PERM_CREATE, cr)) != 0)
886 return (error);
887
888 if ((error = zfs_secpolicy_write_perms(parentname,
889 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
890 return (error);
891
892 return (error);
893 }
894
895 /* ARGSUSED */
896 static int
897 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
898 {
899 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
900 }
901
902 /* ARGSUSED */
903 static int
904 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
905 {
906 dsl_pool_t *dp;
907 dsl_dataset_t *clone;
908 int error;
909
910 error = zfs_secpolicy_write_perms(zc->zc_name,
911 ZFS_DELEG_PERM_PROMOTE, cr);
912 if (error != 0)
913 return (error);
914
915 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
916 if (error != 0)
917 return (error);
918
919 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
920
921 if (error == 0) {
922 char parentname[MAXNAMELEN];
923 dsl_dataset_t *origin = NULL;
924 dsl_dir_t *dd;
925 dd = clone->ds_dir;
926
927 error = dsl_dataset_hold_obj(dd->dd_pool,
928 dd->dd_phys->dd_origin_obj, FTAG, &origin);
929 if (error != 0) {
930 dsl_dataset_rele(clone, FTAG);
931 dsl_pool_rele(dp, FTAG);
932 return (error);
933 }
934
935 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
936 ZFS_DELEG_PERM_MOUNT, cr);
937
938 dsl_dataset_name(origin, parentname);
939 if (error == 0) {
940 error = zfs_secpolicy_write_perms_ds(parentname, origin,
941 ZFS_DELEG_PERM_PROMOTE, cr);
942 }
943 dsl_dataset_rele(clone, FTAG);
944 dsl_dataset_rele(origin, FTAG);
945 }
946 dsl_pool_rele(dp, FTAG);
947 return (error);
948 }
949
950 /* ARGSUSED */
951 static int
952 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
953 {
954 int error;
955
956 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
957 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
958 return (error);
959
960 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
961 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
962 return (error);
963
964 return (zfs_secpolicy_write_perms(zc->zc_name,
965 ZFS_DELEG_PERM_CREATE, cr));
966 }
967
968 int
969 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
970 {
971 return (zfs_secpolicy_write_perms(name,
972 ZFS_DELEG_PERM_SNAPSHOT, cr));
973 }
974
975 /*
976 * Check for permission to create each snapshot in the nvlist.
977 */
978 /* ARGSUSED */
979 static int
980 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
981 {
982 nvlist_t *snaps;
983 int error = 0;
984 nvpair_t *pair;
985
986 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
987 return (SET_ERROR(EINVAL));
988 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
989 pair = nvlist_next_nvpair(snaps, pair)) {
990 char *name = nvpair_name(pair);
991 char *atp = strchr(name, '@');
992
993 if (atp == NULL) {
994 error = SET_ERROR(EINVAL);
995 break;
996 }
997 *atp = '\0';
998 error = zfs_secpolicy_snapshot_perms(name, cr);
999 *atp = '@';
1000 if (error != 0)
1001 break;
1002 }
1003 return (error);
1004 }
1005
1006 /* ARGSUSED */
1007 static int
1008 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1009 {
1010 /*
1011 * Even root must have a proper TSD so that we know what pool
1012 * to log to.
1013 */
1014 if (tsd_get(zfs_allow_log_key) == NULL)
1015 return (SET_ERROR(EPERM));
1016 return (0);
1017 }
1018
1019 static int
1020 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1021 {
1022 char parentname[MAXNAMELEN];
1023 int error;
1024 char *origin;
1025
1026 if ((error = zfs_get_parent(zc->zc_name, parentname,
1027 sizeof (parentname))) != 0)
1028 return (error);
1029
1030 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1031 (error = zfs_secpolicy_write_perms(origin,
1032 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1033 return (error);
1034
1035 if ((error = zfs_secpolicy_write_perms(parentname,
1036 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1037 return (error);
1038
1039 return (zfs_secpolicy_write_perms(parentname,
1040 ZFS_DELEG_PERM_MOUNT, cr));
1041 }
1042
1043 /*
1044 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1045 * SYS_CONFIG privilege, which is not available in a local zone.
1046 */
1047 /* ARGSUSED */
1048 static int
1049 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1050 {
1051 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1052 return (SET_ERROR(EPERM));
1053
1054 return (0);
1055 }
1056
1057 /*
1058 * Policy for object to name lookups.
1059 */
1060 /* ARGSUSED */
1061 static int
1062 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1063 {
1064 int error;
1065
1066 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1067 return (0);
1068
1069 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1070 return (error);
1071 }
1072
1073 /*
1074 * Policy for fault injection. Requires all privileges.
1075 */
1076 /* ARGSUSED */
1077 static int
1078 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1079 {
1080 return (secpolicy_zinject(cr));
1081 }
1082
1083 /* ARGSUSED */
1084 static int
1085 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1086 {
1087 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1088
1089 if (prop == ZPROP_INVAL) {
1090 if (!zfs_prop_user(zc->zc_value))
1091 return (SET_ERROR(EINVAL));
1092 return (zfs_secpolicy_write_perms(zc->zc_name,
1093 ZFS_DELEG_PERM_USERPROP, cr));
1094 } else {
1095 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1096 NULL, cr));
1097 }
1098 }
1099
1100 static int
1101 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1102 {
1103 int err = zfs_secpolicy_read(zc, innvl, cr);
1104 if (err)
1105 return (err);
1106
1107 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1108 return (SET_ERROR(EINVAL));
1109
1110 if (zc->zc_value[0] == 0) {
1111 /*
1112 * They are asking about a posix uid/gid. If it's
1113 * themself, allow it.
1114 */
1115 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1116 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1117 if (zc->zc_guid == crgetuid(cr))
1118 return (0);
1119 } else {
1120 if (groupmember(zc->zc_guid, cr))
1121 return (0);
1122 }
1123 }
1124
1125 return (zfs_secpolicy_write_perms(zc->zc_name,
1126 userquota_perms[zc->zc_objset_type], cr));
1127 }
1128
1129 static int
1130 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1131 {
1132 int err = zfs_secpolicy_read(zc, innvl, cr);
1133 if (err)
1134 return (err);
1135
1136 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1137 return (SET_ERROR(EINVAL));
1138
1139 return (zfs_secpolicy_write_perms(zc->zc_name,
1140 userquota_perms[zc->zc_objset_type], cr));
1141 }
1142
1143 /* ARGSUSED */
1144 static int
1145 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1146 {
1147 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1148 NULL, cr));
1149 }
1150
1151 /* ARGSUSED */
1152 static int
1153 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1154 {
1155 nvpair_t *pair;
1156 nvlist_t *holds;
1157 int error;
1158
1159 error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1160 if (error != 0)
1161 return (SET_ERROR(EINVAL));
1162
1163 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1164 pair = nvlist_next_nvpair(holds, pair)) {
1165 char fsname[MAXNAMELEN];
1166 error = dmu_fsname(nvpair_name(pair), fsname);
1167 if (error != 0)
1168 return (error);
1169 error = zfs_secpolicy_write_perms(fsname,
1170 ZFS_DELEG_PERM_HOLD, cr);
1171 if (error != 0)
1172 return (error);
1173 }
1174 return (0);
1175 }
1176
1177 /* ARGSUSED */
1178 static int
1179 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1180 {
1181 nvpair_t *pair;
1182 int error;
1183
1184 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1185 pair = nvlist_next_nvpair(innvl, pair)) {
1186 char fsname[MAXNAMELEN];
1187 error = dmu_fsname(nvpair_name(pair), fsname);
1188 if (error != 0)
1189 return (error);
1190 error = zfs_secpolicy_write_perms(fsname,
1191 ZFS_DELEG_PERM_RELEASE, cr);
1192 if (error != 0)
1193 return (error);
1194 }
1195 return (0);
1196 }
1197
1198 /*
1199 * Policy for allowing temporary snapshots to be taken or released
1200 */
1201 static int
1202 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1203 {
1204 /*
1205 * A temporary snapshot is the same as a snapshot,
1206 * hold, destroy and release all rolled into one.
1207 * Delegated diff alone is sufficient that we allow this.
1208 */
1209 int error;
1210
1211 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1212 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1213 return (0);
1214
1215 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1216 if (error == 0)
1217 error = zfs_secpolicy_hold(zc, innvl, cr);
1218 if (error == 0)
1219 error = zfs_secpolicy_release(zc, innvl, cr);
1220 if (error == 0)
1221 error = zfs_secpolicy_destroy(zc, innvl, cr);
1222 return (error);
1223 }
1224
1225 /*
1226 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1227 */
1228 static int
1229 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1230 {
1231 char *packed;
1232 int error;
1233 nvlist_t *list = NULL;
1234
1235 /*
1236 * Read in and unpack the user-supplied nvlist.
1237 */
1238 if (size == 0)
1239 return (SET_ERROR(EINVAL));
1240
1241 packed = kmem_alloc(size, KM_SLEEP);
1242
1243 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1244 iflag)) != 0) {
1245 kmem_free(packed, size);
1246 return (error);
1247 }
1248
1249 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1250 kmem_free(packed, size);
1251 return (error);
1252 }
1253
1254 kmem_free(packed, size);
1255
1256 *nvp = list;
1257 return (0);
1258 }
1259
1260 /*
1261 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1262 * Entries will be removed from the end of the nvlist, and one int32 entry
1263 * named "N_MORE_ERRORS" will be added indicating how many entries were
1264 * removed.
1265 */
1266 static int
1267 nvlist_smush(nvlist_t *errors, size_t max)
1268 {
1269 size_t size;
1270
1271 size = fnvlist_size(errors);
1272
1273 if (size > max) {
1274 nvpair_t *more_errors;
1275 int n = 0;
1276
1277 if (max < 1024)
1278 return (SET_ERROR(ENOMEM));
1279
1280 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1281 more_errors = nvlist_prev_nvpair(errors, NULL);
1282
1283 do {
1284 nvpair_t *pair = nvlist_prev_nvpair(errors,
1285 more_errors);
1286 fnvlist_remove_nvpair(errors, pair);
1287 n++;
1288 size = fnvlist_size(errors);
1289 } while (size > max);
1290
1291 fnvlist_remove_nvpair(errors, more_errors);
1292 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1293 ASSERT3U(fnvlist_size(errors), <=, max);
1294 }
1295
1296 return (0);
1297 }
1298
1299 static int
1300 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1301 {
1302 char *packed = NULL;
1303 int error = 0;
1304 size_t size;
1305
1306 size = fnvlist_size(nvl);
1307
1308 if (size > zc->zc_nvlist_dst_size) {
1309 error = SET_ERROR(ENOMEM);
1310 } else {
1311 packed = fnvlist_pack(nvl, &size);
1312 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1313 size, zc->zc_iflags) != 0)
1314 error = SET_ERROR(EFAULT);
1315 fnvlist_pack_free(packed, size);
1316 }
1317
1318 zc->zc_nvlist_dst_size = size;
1319 zc->zc_nvlist_dst_filled = B_TRUE;
1320 return (error);
1321 }
1322
1323 static int
1324 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1325 {
1326 objset_t *os;
1327 int error;
1328
1329 error = dmu_objset_hold(dsname, FTAG, &os);
1330 if (error != 0)
1331 return (error);
1332 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1333 dmu_objset_rele(os, FTAG);
1334 return (SET_ERROR(EINVAL));
1335 }
1336
1337 mutex_enter(&os->os_user_ptr_lock);
1338 *zfvp = dmu_objset_get_user(os);
1339 if (*zfvp) {
1340 VFS_HOLD((*zfvp)->z_vfs);
1341 } else {
1342 error = SET_ERROR(ESRCH);
1343 }
1344 mutex_exit(&os->os_user_ptr_lock);
1345 dmu_objset_rele(os, FTAG);
1346 return (error);
1347 }
1348
1349 /*
1350 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1351 * case its z_vfs will be NULL, and it will be opened as the owner.
1352 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1353 * which prevents all vnode ops from running.
1354 */
1355 static int
1356 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1357 {
1358 int error = 0;
1359
1360 if (getzfsvfs(name, zfvp) != 0)
1361 error = zfsvfs_create(name, zfvp);
1362 if (error == 0) {
1363 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1364 RW_READER, tag);
1365 if ((*zfvp)->z_unmounted) {
1366 /*
1367 * XXX we could probably try again, since the unmounting
1368 * thread should be just about to disassociate the
1369 * objset from the zfsvfs.
1370 */
1371 rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1372 return (SET_ERROR(EBUSY));
1373 }
1374 }
1375 return (error);
1376 }
1377
1378 static void
1379 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1380 {
1381 rrw_exit(&zfsvfs->z_teardown_lock, tag);
1382
1383 if (zfsvfs->z_vfs) {
1384 VFS_RELE(zfsvfs->z_vfs);
1385 } else {
1386 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1387 zfsvfs_free(zfsvfs);
1388 }
1389 }
1390
1391 static int
1392 zfs_ioc_pool_create(zfs_cmd_t *zc)
1393 {
1394 int error;
1395 nvlist_t *config, *props = NULL;
1396 nvlist_t *rootprops = NULL;
1397 nvlist_t *zplprops = NULL;
1398
1399 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1400 zc->zc_iflags, &config))
1401 return (error);
1402
1403 if (zc->zc_nvlist_src_size != 0 && (error =
1404 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1405 zc->zc_iflags, &props))) {
1406 nvlist_free(config);
1407 return (error);
1408 }
1409
1410 if (props) {
1411 nvlist_t *nvl = NULL;
1412 uint64_t version = SPA_VERSION;
1413
1414 (void) nvlist_lookup_uint64(props,
1415 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1416 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1417 error = SET_ERROR(EINVAL);
1418 goto pool_props_bad;
1419 }
1420 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1421 if (nvl) {
1422 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1423 if (error != 0) {
1424 nvlist_free(config);
1425 nvlist_free(props);
1426 return (error);
1427 }
1428 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1429 }
1430 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1431 error = zfs_fill_zplprops_root(version, rootprops,
1432 zplprops, NULL);
1433 if (error != 0)
1434 goto pool_props_bad;
1435 }
1436
1437 error = spa_create(zc->zc_name, config, props, zplprops);
1438
1439 /*
1440 * Set the remaining root properties
1441 */
1442 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1443 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1444 (void) spa_destroy(zc->zc_name);
1445
1446 pool_props_bad:
1447 nvlist_free(rootprops);
1448 nvlist_free(zplprops);
1449 nvlist_free(config);
1450 nvlist_free(props);
1451
1452 return (error);
1453 }
1454
1455 static int
1456 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1457 {
1458 int error;
1459 zfs_log_history(zc);
1460 error = spa_destroy(zc->zc_name);
1461 if (error == 0)
1462 zvol_remove_minors(zc->zc_name);
1463 return (error);
1464 }
1465
1466 static int
1467 zfs_ioc_pool_import(zfs_cmd_t *zc)
1468 {
1469 nvlist_t *config, *props = NULL;
1470 uint64_t guid;
1471 int error;
1472
1473 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1474 zc->zc_iflags, &config)) != 0)
1475 return (error);
1476
1477 if (zc->zc_nvlist_src_size != 0 && (error =
1478 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1479 zc->zc_iflags, &props))) {
1480 nvlist_free(config);
1481 return (error);
1482 }
1483
1484 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1485 guid != zc->zc_guid)
1486 error = SET_ERROR(EINVAL);
1487 else
1488 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1489
1490 if (zc->zc_nvlist_dst != 0) {
1491 int err;
1492
1493 if ((err = put_nvlist(zc, config)) != 0)
1494 error = err;
1495 }
1496
1497 nvlist_free(config);
1498
1499 if (props)
1500 nvlist_free(props);
1501
1502 return (error);
1503 }
1504
1505 static int
1506 zfs_ioc_pool_export(zfs_cmd_t *zc)
1507 {
1508 int error;
1509 boolean_t force = (boolean_t)zc->zc_cookie;
1510 boolean_t hardforce = (boolean_t)zc->zc_guid;
1511
1512 zfs_log_history(zc);
1513 error = spa_export(zc->zc_name, NULL, force, hardforce);
1514 if (error == 0)
1515 zvol_remove_minors(zc->zc_name);
1516 return (error);
1517 }
1518
1519 static int
1520 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1521 {
1522 nvlist_t *configs;
1523 int error;
1524
1525 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1526 return (SET_ERROR(EEXIST));
1527
1528 error = put_nvlist(zc, configs);
1529
1530 nvlist_free(configs);
1531
1532 return (error);
1533 }
1534
1535 /*
1536 * inputs:
1537 * zc_name name of the pool
1538 *
1539 * outputs:
1540 * zc_cookie real errno
1541 * zc_nvlist_dst config nvlist
1542 * zc_nvlist_dst_size size of config nvlist
1543 */
1544 static int
1545 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1546 {
1547 nvlist_t *config;
1548 int error;
1549 int ret = 0;
1550
1551 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1552 sizeof (zc->zc_value));
1553
1554 if (config != NULL) {
1555 ret = put_nvlist(zc, config);
1556 nvlist_free(config);
1557
1558 /*
1559 * The config may be present even if 'error' is non-zero.
1560 * In this case we return success, and preserve the real errno
1561 * in 'zc_cookie'.
1562 */
1563 zc->zc_cookie = error;
1564 } else {
1565 ret = error;
1566 }
1567
1568 return (ret);
1569 }
1570
1571 /*
1572 * Try to import the given pool, returning pool stats as appropriate so that
1573 * user land knows which devices are available and overall pool health.
1574 */
1575 static int
1576 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1577 {
1578 nvlist_t *tryconfig, *config;
1579 int error;
1580
1581 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1582 zc->zc_iflags, &tryconfig)) != 0)
1583 return (error);
1584
1585 config = spa_tryimport(tryconfig);
1586
1587 nvlist_free(tryconfig);
1588
1589 if (config == NULL)
1590 return (SET_ERROR(EINVAL));
1591
1592 error = put_nvlist(zc, config);
1593 nvlist_free(config);
1594
1595 return (error);
1596 }
1597
1598 /*
1599 * inputs:
1600 * zc_name name of the pool
1601 * zc_cookie scan func (pool_scan_func_t)
1602 */
1603 static int
1604 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1605 {
1606 spa_t *spa;
1607 int error;
1608
1609 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1610 return (error);
1611
1612 if (zc->zc_cookie == POOL_SCAN_NONE)
1613 error = spa_scan_stop(spa);
1614 else
1615 error = spa_scan(spa, zc->zc_cookie);
1616
1617 spa_close(spa, FTAG);
1618
1619 return (error);
1620 }
1621
1622 static int
1623 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1624 {
1625 spa_t *spa;
1626 int error;
1627
1628 error = spa_open(zc->zc_name, &spa, FTAG);
1629 if (error == 0) {
1630 spa_freeze(spa);
1631 spa_close(spa, FTAG);
1632 }
1633 return (error);
1634 }
1635
1636 static int
1637 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1638 {
1639 spa_t *spa;
1640 int error;
1641
1642 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1643 return (error);
1644
1645 if (zc->zc_cookie < spa_version(spa) ||
1646 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1647 spa_close(spa, FTAG);
1648 return (SET_ERROR(EINVAL));
1649 }
1650
1651 spa_upgrade(spa, zc->zc_cookie);
1652 spa_close(spa, FTAG);
1653
1654 return (error);
1655 }
1656
1657 static int
1658 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1659 {
1660 spa_t *spa;
1661 char *hist_buf;
1662 uint64_t size;
1663 int error;
1664
1665 if ((size = zc->zc_history_len) == 0)
1666 return (SET_ERROR(EINVAL));
1667
1668 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1669 return (error);
1670
1671 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1672 spa_close(spa, FTAG);
1673 return (SET_ERROR(ENOTSUP));
1674 }
1675
1676 hist_buf = kmem_alloc(size, KM_SLEEP);
1677 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1678 &zc->zc_history_len, hist_buf)) == 0) {
1679 error = ddi_copyout(hist_buf,
1680 (void *)(uintptr_t)zc->zc_history,
1681 zc->zc_history_len, zc->zc_iflags);
1682 }
1683
1684 spa_close(spa, FTAG);
1685 kmem_free(hist_buf, size);
1686 return (error);
1687 }
1688
1689 static int
1690 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1691 {
1692 spa_t *spa;
1693 int error;
1694
1695 error = spa_open(zc->zc_name, &spa, FTAG);
1696 if (error == 0) {
1697 error = spa_change_guid(spa);
1698 spa_close(spa, FTAG);
1699 }
1700 return (error);
1701 }
1702
1703 static int
1704 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1705 {
1706 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1707 }
1708
1709 /*
1710 * inputs:
1711 * zc_name name of filesystem
1712 * zc_obj object to find
1713 *
1714 * outputs:
1715 * zc_value name of object
1716 */
1717 static int
1718 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1719 {
1720 objset_t *os;
1721 int error;
1722
1723 /* XXX reading from objset not owned */
1724 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1725 return (error);
1726 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1727 dmu_objset_rele(os, FTAG);
1728 return (SET_ERROR(EINVAL));
1729 }
1730 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1731 sizeof (zc->zc_value));
1732 dmu_objset_rele(os, FTAG);
1733
1734 return (error);
1735 }
1736
1737 /*
1738 * inputs:
1739 * zc_name name of filesystem
1740 * zc_obj object to find
1741 *
1742 * outputs:
1743 * zc_stat stats on object
1744 * zc_value path to object
1745 */
1746 static int
1747 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1748 {
1749 objset_t *os;
1750 int error;
1751
1752 /* XXX reading from objset not owned */
1753 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1754 return (error);
1755 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1756 dmu_objset_rele(os, FTAG);
1757 return (SET_ERROR(EINVAL));
1758 }
1759 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1760 sizeof (zc->zc_value));
1761 dmu_objset_rele(os, FTAG);
1762
1763 return (error);
1764 }
1765
1766 static int
1767 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1768 {
1769 spa_t *spa;
1770 int error;
1771 nvlist_t *config, **l2cache, **spares;
1772 uint_t nl2cache = 0, nspares = 0;
1773
1774 error = spa_open(zc->zc_name, &spa, FTAG);
1775 if (error != 0)
1776 return (error);
1777
1778 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1779 zc->zc_iflags, &config);
1780 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1781 &l2cache, &nl2cache);
1782
1783 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1784 &spares, &nspares);
1785
1786 /*
1787 * A root pool with concatenated devices is not supported.
1788 * Thus, can not add a device to a root pool.
1789 *
1790 * Intent log device can not be added to a rootpool because
1791 * during mountroot, zil is replayed, a seperated log device
1792 * can not be accessed during the mountroot time.
1793 *
1794 * l2cache and spare devices are ok to be added to a rootpool.
1795 */
1796 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1797 nvlist_free(config);
1798 spa_close(spa, FTAG);
1799 return (SET_ERROR(EDOM));
1800 }
1801
1802 if (error == 0) {
1803 error = spa_vdev_add(spa, config);
1804 nvlist_free(config);
1805 }
1806 spa_close(spa, FTAG);
1807 return (error);
1808 }
1809
1810 /*
1811 * inputs:
1812 * zc_name name of the pool
1813 * zc_nvlist_conf nvlist of devices to remove
1814 * zc_cookie to stop the remove?
1815 */
1816 static int
1817 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1818 {
1819 spa_t *spa;
1820 int error;
1821
1822 error = spa_open(zc->zc_name, &spa, FTAG);
1823 if (error != 0)
1824 return (error);
1825 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1826 spa_close(spa, FTAG);
1827 return (error);
1828 }
1829
1830 static int
1831 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1832 {
1833 spa_t *spa;
1834 int error;
1835 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1836
1837 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1838 return (error);
1839 switch (zc->zc_cookie) {
1840 case VDEV_STATE_ONLINE:
1841 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1842 break;
1843
1844 case VDEV_STATE_OFFLINE:
1845 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1846 break;
1847
1848 case VDEV_STATE_FAULTED:
1849 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1850 zc->zc_obj != VDEV_AUX_EXTERNAL)
1851 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1852
1853 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1854 break;
1855
1856 case VDEV_STATE_DEGRADED:
1857 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1858 zc->zc_obj != VDEV_AUX_EXTERNAL)
1859 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1860
1861 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1862 break;
1863
1864 default:
1865 error = SET_ERROR(EINVAL);
1866 }
1867 zc->zc_cookie = newstate;
1868 spa_close(spa, FTAG);
1869 return (error);
1870 }
1871
1872 static int
1873 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1874 {
1875 spa_t *spa;
1876 int replacing = zc->zc_cookie;
1877 nvlist_t *config;
1878 int error;
1879
1880 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1881 return (error);
1882
1883 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1884 zc->zc_iflags, &config)) == 0) {
1885 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1886 nvlist_free(config);
1887 }
1888
1889 spa_close(spa, FTAG);
1890 return (error);
1891 }
1892
1893 static int
1894 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1895 {
1896 spa_t *spa;
1897 int error;
1898
1899 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1900 return (error);
1901
1902 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1903
1904 spa_close(spa, FTAG);
1905 return (error);
1906 }
1907
1908 static int
1909 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1910 {
1911 spa_t *spa;
1912 nvlist_t *config, *props = NULL;
1913 int error;
1914 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1915
1916 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1917 return (error);
1918
1919 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1920 zc->zc_iflags, &config)) {
1921 spa_close(spa, FTAG);
1922 return (error);
1923 }
1924
1925 if (zc->zc_nvlist_src_size != 0 && (error =
1926 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1927 zc->zc_iflags, &props))) {
1928 spa_close(spa, FTAG);
1929 nvlist_free(config);
1930 return (error);
1931 }
1932
1933 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1934
1935 spa_close(spa, FTAG);
1936
1937 nvlist_free(config);
1938 nvlist_free(props);
1939
1940 return (error);
1941 }
1942
1943 static int
1944 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
1945 {
1946 spa_t *spa;
1947 char *path = zc->zc_value;
1948 uint64_t guid = zc->zc_guid;
1949 int error;
1950
1951 error = spa_open(zc->zc_name, &spa, FTAG);
1952 if (error != 0)
1953 return (error);
1954
1955 error = spa_vdev_setpath(spa, guid, path);
1956 spa_close(spa, FTAG);
1957 return (error);
1958 }
1959
1960 static int
1961 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
1962 {
1963 spa_t *spa;
1964 char *fru = zc->zc_value;
1965 uint64_t guid = zc->zc_guid;
1966 int error;
1967
1968 error = spa_open(zc->zc_name, &spa, FTAG);
1969 if (error != 0)
1970 return (error);
1971
1972 error = spa_vdev_setfru(spa, guid, fru);
1973 spa_close(spa, FTAG);
1974 return (error);
1975 }
1976
1977 static int
1978 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
1979 {
1980 int error = 0;
1981 nvlist_t *nv;
1982
1983 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1984
1985 if (zc->zc_nvlist_dst != 0 &&
1986 (error = dsl_prop_get_all(os, &nv)) == 0) {
1987 dmu_objset_stats(os, nv);
1988 /*
1989 * NB: zvol_get_stats() will read the objset contents,
1990 * which we aren't supposed to do with a
1991 * DS_MODE_USER hold, because it could be
1992 * inconsistent. So this is a bit of a workaround...
1993 * XXX reading with out owning
1994 */
1995 if (!zc->zc_objset_stats.dds_inconsistent &&
1996 dmu_objset_type(os) == DMU_OST_ZVOL) {
1997 error = zvol_get_stats(os, nv);
1998 if (error == EIO)
1999 return (error);
2000 VERIFY0(error);
2001 }
2002 error = put_nvlist(zc, nv);
2003 nvlist_free(nv);
2004 }
2005
2006 return (error);
2007 }
2008
2009 /*
2010 * inputs:
2011 * zc_name name of filesystem
2012 * zc_nvlist_dst_size size of buffer for property nvlist
2013 *
2014 * outputs:
2015 * zc_objset_stats stats
2016 * zc_nvlist_dst property nvlist
2017 * zc_nvlist_dst_size size of property nvlist
2018 */
2019 static int
2020 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2021 {
2022 objset_t *os;
2023 int error;
2024
2025 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2026 if (error == 0) {
2027 error = zfs_ioc_objset_stats_impl(zc, os);
2028 dmu_objset_rele(os, FTAG);
2029 }
2030
2031 return (error);
2032 }
2033
2034 /*
2035 * inputs:
2036 * zc_name name of filesystem
2037 * zc_nvlist_dst_size size of buffer for property nvlist
2038 *
2039 * outputs:
2040 * zc_nvlist_dst received property nvlist
2041 * zc_nvlist_dst_size size of received property nvlist
2042 *
2043 * Gets received properties (distinct from local properties on or after
2044 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2045 * local property values.
2046 */
2047 static int
2048 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2049 {
2050 int error = 0;
2051 nvlist_t *nv;
2052
2053 /*
2054 * Without this check, we would return local property values if the
2055 * caller has not already received properties on or after
2056 * SPA_VERSION_RECVD_PROPS.
2057 */
2058 if (!dsl_prop_get_hasrecvd(zc->zc_name))
2059 return (SET_ERROR(ENOTSUP));
2060
2061 if (zc->zc_nvlist_dst != 0 &&
2062 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2063 error = put_nvlist(zc, nv);
2064 nvlist_free(nv);
2065 }
2066
2067 return (error);
2068 }
2069
2070 static int
2071 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2072 {
2073 uint64_t value;
2074 int error;
2075
2076 /*
2077 * zfs_get_zplprop() will either find a value or give us
2078 * the default value (if there is one).
2079 */
2080 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2081 return (error);
2082 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2083 return (0);
2084 }
2085
2086 /*
2087 * inputs:
2088 * zc_name name of filesystem
2089 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2090 *
2091 * outputs:
2092 * zc_nvlist_dst zpl property nvlist
2093 * zc_nvlist_dst_size size of zpl property nvlist
2094 */
2095 static int
2096 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2097 {
2098 objset_t *os;
2099 int err;
2100
2101 /* XXX reading without owning */
2102 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2103 return (err);
2104
2105 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2106
2107 /*
2108 * NB: nvl_add_zplprop() will read the objset contents,
2109 * which we aren't supposed to do with a DS_MODE_USER
2110 * hold, because it could be inconsistent.
2111 */
2112 if (zc->zc_nvlist_dst != NULL &&
2113 !zc->zc_objset_stats.dds_inconsistent &&
2114 dmu_objset_type(os) == DMU_OST_ZFS) {
2115 nvlist_t *nv;
2116
2117 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2118 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2119 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2120 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2121 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2122 err = put_nvlist(zc, nv);
2123 nvlist_free(nv);
2124 } else {
2125 err = SET_ERROR(ENOENT);
2126 }
2127 dmu_objset_rele(os, FTAG);
2128 return (err);
2129 }
2130
2131 static boolean_t
2132 dataset_name_hidden(const char *name)
2133 {
2134 /*
2135 * Skip over datasets that are not visible in this zone,
2136 * internal datasets (which have a $ in their name), and
2137 * temporary datasets (which have a % in their name).
2138 */
2139 if (strchr(name, '$') != NULL)
2140 return (B_TRUE);
2141 if (strchr(name, '%') != NULL)
2142 return (B_TRUE);
2143 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2144 return (B_TRUE);
2145 return (B_FALSE);
2146 }
2147
2148 /*
2149 * inputs:
2150 * zc_name name of filesystem
2151 * zc_cookie zap cursor
2152 * zc_nvlist_dst_size size of buffer for property nvlist
2153 *
2154 * outputs:
2155 * zc_name name of next filesystem
2156 * zc_cookie zap cursor
2157 * zc_objset_stats stats
2158 * zc_nvlist_dst property nvlist
2159 * zc_nvlist_dst_size size of property nvlist
2160 */
2161 static int
2162 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2163 {
2164 objset_t *os;
2165 int error;
2166 char *p;
2167 size_t orig_len = strlen(zc->zc_name);
2168
2169 top:
2170 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2171 if (error == ENOENT)
2172 error = SET_ERROR(ESRCH);
2173 return (error);
2174 }
2175
2176 p = strrchr(zc->zc_name, '/');
2177 if (p == NULL || p[1] != '\0')
2178 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2179 p = zc->zc_name + strlen(zc->zc_name);
2180
2181 do {
2182 error = dmu_dir_list_next(os,
2183 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2184 NULL, &zc->zc_cookie);
2185 if (error == ENOENT)
2186 error = SET_ERROR(ESRCH);
2187 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2188 dmu_objset_rele(os, FTAG);
2189
2190 /*
2191 * If it's an internal dataset (ie. with a '$' in its name),
2192 * don't try to get stats for it, otherwise we'll return ENOENT.
2193 */
2194 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2195 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2196 if (error == ENOENT) {
2197 /* We lost a race with destroy, get the next one. */
2198 zc->zc_name[orig_len] = '\0';
2199 goto top;
2200 }
2201 }
2202 return (error);
2203 }
2204
2205 /*
2206 * inputs:
2207 * zc_name name of filesystem
2208 * zc_cookie zap cursor
2209 * zc_nvlist_dst_size size of buffer for property nvlist
2210 *
2211 * outputs:
2212 * zc_name name of next snapshot
2213 * zc_objset_stats stats
2214 * zc_nvlist_dst property nvlist
2215 * zc_nvlist_dst_size size of property nvlist
2216 */
2217 static int
2218 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2219 {
2220 objset_t *os;
2221 int error;
2222
2223 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2224 if (error != 0) {
2225 return (error == ENOENT ? ESRCH : error);
2226 }
2227
2228 /*
2229 * A dataset name of maximum length cannot have any snapshots,
2230 * so exit immediately.
2231 */
2232 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2233 dmu_objset_rele(os, FTAG);
2234 return (SET_ERROR(ESRCH));
2235 }
2236
2237 error = dmu_snapshot_list_next(os,
2238 sizeof (zc->zc_name) - strlen(zc->zc_name),
2239 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2240 NULL);
2241
2242 if (error == 0) {
2243 dsl_dataset_t *ds;
2244 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2245
2246 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2247 if (error == 0) {
2248 objset_t *ossnap;
2249
2250 error = dmu_objset_from_ds(ds, &ossnap);
2251 if (error == 0)
2252 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2253 dsl_dataset_rele(ds, FTAG);
2254 }
2255 } else if (error == ENOENT) {
2256 error = SET_ERROR(ESRCH);
2257 }
2258
2259 dmu_objset_rele(os, FTAG);
2260 /* if we failed, undo the @ that we tacked on to zc_name */
2261 if (error != 0)
2262 *strchr(zc->zc_name, '@') = '\0';
2263 return (error);
2264 }
2265
2266 static int
2267 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2268 {
2269 const char *propname = nvpair_name(pair);
2270 uint64_t *valary;
2271 unsigned int vallen;
2272 const char *domain;
2273 char *dash;
2274 zfs_userquota_prop_t type;
2275 uint64_t rid;
2276 uint64_t quota;
2277 zfsvfs_t *zfsvfs;
2278 int err;
2279
2280 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2281 nvlist_t *attrs;
2282 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2283 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2284 &pair) != 0)
2285 return (SET_ERROR(EINVAL));
2286 }
2287
2288 /*
2289 * A correctly constructed propname is encoded as
2290 * userquota@<rid>-<domain>.
2291 */
2292 if ((dash = strchr(propname, '-')) == NULL ||
2293 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2294 vallen != 3)
2295 return (SET_ERROR(EINVAL));
2296
2297 domain = dash + 1;
2298 type = valary[0];
2299 rid = valary[1];
2300 quota = valary[2];
2301
2302 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2303 if (err == 0) {
2304 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2305 zfsvfs_rele(zfsvfs, FTAG);
2306 }
2307
2308 return (err);
2309 }
2310
2311 /*
2312 * If the named property is one that has a special function to set its value,
2313 * return 0 on success and a positive error code on failure; otherwise if it is
2314 * not one of the special properties handled by this function, return -1.
2315 *
2316 * XXX: It would be better for callers of the property interface if we handled
2317 * these special cases in dsl_prop.c (in the dsl layer).
2318 */
2319 static int
2320 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2321 nvpair_t *pair)
2322 {
2323 const char *propname = nvpair_name(pair);
2324 zfs_prop_t prop = zfs_name_to_prop(propname);
2325 uint64_t intval;
2326 int err;
2327
2328 if (prop == ZPROP_INVAL) {
2329 if (zfs_prop_userquota(propname))
2330 return (zfs_prop_set_userquota(dsname, pair));
2331 return (-1);
2332 }
2333
2334 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2335 nvlist_t *attrs;
2336 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2337 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2338 &pair) == 0);
2339 }
2340
2341 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2342 return (-1);
2343
2344 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2345
2346 switch (prop) {
2347 case ZFS_PROP_QUOTA:
2348 err = dsl_dir_set_quota(dsname, source, intval);
2349 break;
2350 case ZFS_PROP_REFQUOTA:
2351 err = dsl_dataset_set_refquota(dsname, source, intval);
2352 break;
2353 case ZFS_PROP_RESERVATION:
2354 err = dsl_dir_set_reservation(dsname, source, intval);
2355 break;
2356 case ZFS_PROP_REFRESERVATION:
2357 err = dsl_dataset_set_refreservation(dsname, source, intval);
2358 break;
2359 case ZFS_PROP_VOLSIZE:
2360 err = zvol_set_volsize(dsname, intval);
2361 break;
2362 case ZFS_PROP_VERSION:
2363 {
2364 zfsvfs_t *zfsvfs;
2365
2366 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2367 break;
2368
2369 err = zfs_set_version(zfsvfs, intval);
2370 zfsvfs_rele(zfsvfs, FTAG);
2371
2372 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2373 zfs_cmd_t *zc;
2374
2375 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2376 (void) strcpy(zc->zc_name, dsname);
2377 (void) zfs_ioc_userspace_upgrade(zc);
2378 kmem_free(zc, sizeof (zfs_cmd_t));
2379 }
2380 break;
2381 }
2382 case ZFS_PROP_COMPRESSION:
2383 {
2384 if (intval == ZIO_COMPRESS_LZ4) {
2385 zfeature_info_t *feature =
2386 &spa_feature_table[SPA_FEATURE_LZ4_COMPRESS];
2387 spa_t *spa;
2388
2389 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
2390 return (err);
2391
2392 /*
2393 * Setting the LZ4 compression algorithm activates
2394 * the feature.
2395 */
2396 if (!spa_feature_is_active(spa, feature)) {
2397 if ((err = zfs_prop_activate_feature(spa,
2398 feature)) != 0) {
2399 spa_close(spa, FTAG);
2400 return (err);
2401 }
2402 }
2403
2404 spa_close(spa, FTAG);
2405 }
2406 /*
2407 * We still want the default set action to be performed in the
2408 * caller, we only performed zfeature settings here.
2409 */
2410 err = -1;
2411 break;
2412 }
2413
2414 default:
2415 err = -1;
2416 }
2417
2418 return (err);
2419 }
2420
2421 /*
2422 * This function is best effort. If it fails to set any of the given properties,
2423 * it continues to set as many as it can and returns the last error
2424 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2425 * with the list of names of all the properties that failed along with the
2426 * corresponding error numbers.
2427 *
2428 * If every property is set successfully, zero is returned and errlist is not
2429 * modified.
2430 */
2431 int
2432 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2433 nvlist_t *errlist)
2434 {
2435 nvpair_t *pair;
2436 nvpair_t *propval;
2437 int rv = 0;
2438 uint64_t intval;
2439 char *strval;
2440 nvlist_t *genericnvl = fnvlist_alloc();
2441 nvlist_t *retrynvl = fnvlist_alloc();
2442
2443 retry:
2444 pair = NULL;
2445 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2446 const char *propname = nvpair_name(pair);
2447 zfs_prop_t prop = zfs_name_to_prop(propname);
2448 int err = 0;
2449
2450 /* decode the property value */
2451 propval = pair;
2452 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2453 nvlist_t *attrs;
2454 attrs = fnvpair_value_nvlist(pair);
2455 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2456 &propval) != 0)
2457 err = SET_ERROR(EINVAL);
2458 }
2459
2460 /* Validate value type */
2461 if (err == 0 && prop == ZPROP_INVAL) {
2462 if (zfs_prop_user(propname)) {
2463 if (nvpair_type(propval) != DATA_TYPE_STRING)
2464 err = SET_ERROR(EINVAL);
2465 } else if (zfs_prop_userquota(propname)) {
2466 if (nvpair_type(propval) !=
2467 DATA_TYPE_UINT64_ARRAY)
2468 err = SET_ERROR(EINVAL);
2469 } else {
2470 err = SET_ERROR(EINVAL);
2471 }
2472 } else if (err == 0) {
2473 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2474 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2475 err = SET_ERROR(EINVAL);
2476 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2477 const char *unused;
2478
2479 intval = fnvpair_value_uint64(propval);
2480
2481 switch (zfs_prop_get_type(prop)) {
2482 case PROP_TYPE_NUMBER:
2483 break;
2484 case PROP_TYPE_STRING:
2485 err = SET_ERROR(EINVAL);
2486 break;
2487 case PROP_TYPE_INDEX:
2488 if (zfs_prop_index_to_string(prop,
2489 intval, &unused) != 0)
2490 err = SET_ERROR(EINVAL);
2491 break;
2492 default:
2493 cmn_err(CE_PANIC,
2494 "unknown property type");
2495 }
2496 } else {
2497 err = SET_ERROR(EINVAL);
2498 }
2499 }
2500
2501 /* Validate permissions */
2502 if (err == 0)
2503 err = zfs_check_settable(dsname, pair, CRED());
2504
2505 if (err == 0) {
2506 err = zfs_prop_set_special(dsname, source, pair);
2507 if (err == -1) {
2508 /*
2509 * For better performance we build up a list of
2510 * properties to set in a single transaction.
2511 */
2512 err = nvlist_add_nvpair(genericnvl, pair);
2513 } else if (err != 0 && nvl != retrynvl) {
2514 /*
2515 * This may be a spurious error caused by
2516 * receiving quota and reservation out of order.
2517 * Try again in a second pass.
2518 */
2519 err = nvlist_add_nvpair(retrynvl, pair);
2520 }
2521 }
2522
2523 if (err != 0) {
2524 if (errlist != NULL)
2525 fnvlist_add_int32(errlist, propname, err);
2526 rv = err;
2527 }
2528 }
2529
2530 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2531 nvl = retrynvl;
2532 goto retry;
2533 }
2534
2535 if (!nvlist_empty(genericnvl) &&
2536 dsl_props_set(dsname, source, genericnvl) != 0) {
2537 /*
2538 * If this fails, we still want to set as many properties as we
2539 * can, so try setting them individually.
2540 */
2541 pair = NULL;
2542 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2543 const char *propname = nvpair_name(pair);
2544 int err = 0;
2545
2546 propval = pair;
2547 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2548 nvlist_t *attrs;
2549 attrs = fnvpair_value_nvlist(pair);
2550 propval = fnvlist_lookup_nvpair(attrs,
2551 ZPROP_VALUE);
2552 }
2553
2554 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2555 strval = fnvpair_value_string(propval);
2556 err = dsl_prop_set_string(dsname, propname,
2557 source, strval);
2558 } else {
2559 intval = fnvpair_value_uint64(propval);
2560 err = dsl_prop_set_int(dsname, propname, source,
2561 intval);
2562 }
2563
2564 if (err != 0) {
2565 if (errlist != NULL) {
2566 fnvlist_add_int32(errlist, propname,
2567 err);
2568 }
2569 rv = err;
2570 }
2571 }
2572 }
2573 nvlist_free(genericnvl);
2574 nvlist_free(retrynvl);
2575
2576 return (rv);
2577 }
2578
2579 /*
2580 * Check that all the properties are valid user properties.
2581 */
2582 static int
2583 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2584 {
2585 nvpair_t *pair = NULL;
2586 int error = 0;
2587
2588 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2589 const char *propname = nvpair_name(pair);
2590 char *valstr;
2591
2592 if (!zfs_prop_user(propname) ||
2593 nvpair_type(pair) != DATA_TYPE_STRING)
2594 return (SET_ERROR(EINVAL));
2595
2596 if (error = zfs_secpolicy_write_perms(fsname,
2597 ZFS_DELEG_PERM_USERPROP, CRED()))
2598 return (error);
2599
2600 if (strlen(propname) >= ZAP_MAXNAMELEN)
2601 return (SET_ERROR(ENAMETOOLONG));
2602
2603 VERIFY(nvpair_value_string(pair, &valstr) == 0);
2604 if (strlen(valstr) >= ZAP_MAXVALUELEN)
2605 return (E2BIG);
2606 }
2607 return (0);
2608 }
2609
2610 static void
2611 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2612 {
2613 nvpair_t *pair;
2614
2615 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2616
2617 pair = NULL;
2618 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2619 if (nvlist_exists(skipped, nvpair_name(pair)))
2620 continue;
2621
2622 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2623 }
2624 }
2625
2626 static int
2627 clear_received_props(const char *dsname, nvlist_t *props,
2628 nvlist_t *skipped)
2629 {
2630 int err = 0;
2631 nvlist_t *cleared_props = NULL;
2632 props_skip(props, skipped, &cleared_props);
2633 if (!nvlist_empty(cleared_props)) {
2634 /*
2635 * Acts on local properties until the dataset has received
2636 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2637 */
2638 zprop_source_t flags = (ZPROP_SRC_NONE |
2639 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2640 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2641 }
2642 nvlist_free(cleared_props);
2643 return (err);
2644 }
2645
2646 /*
2647 * inputs:
2648 * zc_name name of filesystem
2649 * zc_value name of property to set
2650 * zc_nvlist_src{_size} nvlist of properties to apply
2651 * zc_cookie received properties flag
2652 *
2653 * outputs:
2654 * zc_nvlist_dst{_size} error for each unapplied received property
2655 */
2656 static int
2657 zfs_ioc_set_prop(zfs_cmd_t *zc)
2658 {
2659 nvlist_t *nvl;
2660 boolean_t received = zc->zc_cookie;
2661 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2662 ZPROP_SRC_LOCAL);
2663 nvlist_t *errors;
2664 int error;
2665
2666 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2667 zc->zc_iflags, &nvl)) != 0)
2668 return (error);
2669
2670 if (received) {
2671 nvlist_t *origprops;
2672
2673 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2674 (void) clear_received_props(zc->zc_name,
2675 origprops, nvl);
2676 nvlist_free(origprops);
2677 }
2678
2679 error = dsl_prop_set_hasrecvd(zc->zc_name);
2680 }
2681
2682 errors = fnvlist_alloc();
2683 if (error == 0)
2684 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2685
2686 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2687 (void) put_nvlist(zc, errors);
2688 }
2689
2690 nvlist_free(errors);
2691 nvlist_free(nvl);
2692 return (error);
2693 }
2694
2695 /*
2696 * inputs:
2697 * zc_name name of filesystem
2698 * zc_value name of property to inherit
2699 * zc_cookie revert to received value if TRUE
2700 *
2701 * outputs: none
2702 */
2703 static int
2704 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2705 {
2706 const char *propname = zc->zc_value;
2707 zfs_prop_t prop = zfs_name_to_prop(propname);
2708 boolean_t received = zc->zc_cookie;
2709 zprop_source_t source = (received
2710 ? ZPROP_SRC_NONE /* revert to received value, if any */
2711 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2712
2713 if (received) {
2714 nvlist_t *dummy;
2715 nvpair_t *pair;
2716 zprop_type_t type;
2717 int err;
2718
2719 /*
2720 * zfs_prop_set_special() expects properties in the form of an
2721 * nvpair with type info.
2722 */
2723 if (prop == ZPROP_INVAL) {
2724 if (!zfs_prop_user(propname))
2725 return (SET_ERROR(EINVAL));
2726
2727 type = PROP_TYPE_STRING;
2728 } else if (prop == ZFS_PROP_VOLSIZE ||
2729 prop == ZFS_PROP_VERSION) {
2730 return (SET_ERROR(EINVAL));
2731 } else {
2732 type = zfs_prop_get_type(prop);
2733 }
2734
2735 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2736
2737 switch (type) {
2738 case PROP_TYPE_STRING:
2739 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2740 break;
2741 case PROP_TYPE_NUMBER:
2742 case PROP_TYPE_INDEX:
2743 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2744 break;
2745 default:
2746 nvlist_free(dummy);
2747 return (SET_ERROR(EINVAL));
2748 }
2749
2750 pair = nvlist_next_nvpair(dummy, NULL);
2751 err = zfs_prop_set_special(zc->zc_name, source, pair);
2752 nvlist_free(dummy);
2753 if (err != -1)
2754 return (err); /* special property already handled */
2755 } else {
2756 /*
2757 * Only check this in the non-received case. We want to allow
2758 * 'inherit -S' to revert non-inheritable properties like quota
2759 * and reservation to the received or default values even though
2760 * they are not considered inheritable.
2761 */
2762 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2763 return (SET_ERROR(EINVAL));
2764 }
2765
2766 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2767 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2768 }
2769
2770 static int
2771 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2772 {
2773 nvlist_t *props;
2774 spa_t *spa;
2775 int error;
2776 nvpair_t *pair;
2777
2778 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2779 zc->zc_iflags, &props))
2780 return (error);
2781
2782 /*
2783 * If the only property is the configfile, then just do a spa_lookup()
2784 * to handle the faulted case.
2785 */
2786 pair = nvlist_next_nvpair(props, NULL);
2787 if (pair != NULL && strcmp(nvpair_name(pair),
2788 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2789 nvlist_next_nvpair(props, pair) == NULL) {
2790 mutex_enter(&spa_namespace_lock);
2791 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2792 spa_configfile_set(spa, props, B_FALSE);
2793 spa_config_sync(spa, B_FALSE, B_TRUE);
2794 }
2795 mutex_exit(&spa_namespace_lock);
2796 if (spa != NULL) {
2797 nvlist_free(props);
2798 return (0);
2799 }
2800 }
2801
2802 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2803 nvlist_free(props);
2804 return (error);
2805 }
2806
2807 error = spa_prop_set(spa, props);
2808
2809 nvlist_free(props);
2810 spa_close(spa, FTAG);
2811
2812 return (error);
2813 }
2814
2815 static int
2816 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2817 {
2818 spa_t *spa;
2819 int error;
2820 nvlist_t *nvp = NULL;
2821
2822 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2823 /*
2824 * If the pool is faulted, there may be properties we can still
2825 * get (such as altroot and cachefile), so attempt to get them
2826 * anyway.
2827 */
2828 mutex_enter(&spa_namespace_lock);
2829 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2830 error = spa_prop_get(spa, &nvp);
2831 mutex_exit(&spa_namespace_lock);
2832 } else {
2833 error = spa_prop_get(spa, &nvp);
2834 spa_close(spa, FTAG);
2835 }
2836
2837 if (error == 0 && zc->zc_nvlist_dst != NULL)
2838 error = put_nvlist(zc, nvp);
2839 else
2840 error = SET_ERROR(EFAULT);
2841
2842 nvlist_free(nvp);
2843 return (error);
2844 }
2845
2846 /*
2847 * inputs:
2848 * zc_name name of filesystem
2849 * zc_nvlist_src{_size} nvlist of delegated permissions
2850 * zc_perm_action allow/unallow flag
2851 *
2852 * outputs: none
2853 */
2854 static int
2855 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2856 {
2857 int error;
2858 nvlist_t *fsaclnv = NULL;
2859
2860 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2861 zc->zc_iflags, &fsaclnv)) != 0)
2862 return (error);
2863
2864 /*
2865 * Verify nvlist is constructed correctly
2866 */
2867 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2868 nvlist_free(fsaclnv);
2869 return (SET_ERROR(EINVAL));
2870 }
2871
2872 /*
2873 * If we don't have PRIV_SYS_MOUNT, then validate
2874 * that user is allowed to hand out each permission in
2875 * the nvlist(s)
2876 */
2877
2878 error = secpolicy_zfs(CRED());
2879 if (error != 0) {
2880 if (zc->zc_perm_action == B_FALSE) {
2881 error = dsl_deleg_can_allow(zc->zc_name,
2882 fsaclnv, CRED());
2883 } else {
2884 error = dsl_deleg_can_unallow(zc->zc_name,
2885 fsaclnv, CRED());
2886 }
2887 }
2888
2889 if (error == 0)
2890 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2891
2892 nvlist_free(fsaclnv);
2893 return (error);
2894 }
2895
2896 /*
2897 * inputs:
2898 * zc_name name of filesystem
2899 *
2900 * outputs:
2901 * zc_nvlist_src{_size} nvlist of delegated permissions
2902 */
2903 static int
2904 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2905 {
2906 nvlist_t *nvp;
2907 int error;
2908
2909 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2910 error = put_nvlist(zc, nvp);
2911 nvlist_free(nvp);
2912 }
2913
2914 return (error);
2915 }
2916
2917 /*
2918 * Search the vfs list for a specified resource. Returns a pointer to it
2919 * or NULL if no suitable entry is found. The caller of this routine
2920 * is responsible for releasing the returned vfs pointer.
2921 */
2922 static vfs_t *
2923 zfs_get_vfs(const char *resource)
2924 {
2925 struct vfs *vfsp;
2926 struct vfs *vfs_found = NULL;
2927
2928 vfs_list_read_lock();
2929 vfsp = rootvfs;
2930 do {
2931 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2932 VFS_HOLD(vfsp);
2933 vfs_found = vfsp;
2934 break;
2935 }
2936 vfsp = vfsp->vfs_next;
2937 } while (vfsp != rootvfs);
2938 vfs_list_unlock();
2939 return (vfs_found);
2940 }
2941
2942 /* ARGSUSED */
2943 static void
2944 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2945 {
2946 zfs_creat_t *zct = arg;
2947
2948 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2949 }
2950
2951 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2952
2953 /*
2954 * inputs:
2955 * os parent objset pointer (NULL if root fs)
2956 * fuids_ok fuids allowed in this version of the spa?
2957 * sa_ok SAs allowed in this version of the spa?
2958 * createprops list of properties requested by creator
2959 *
2960 * outputs:
2961 * zplprops values for the zplprops we attach to the master node object
2962 * is_ci true if requested file system will be purely case-insensitive
2963 *
2964 * Determine the settings for utf8only, normalization and
2965 * casesensitivity. Specific values may have been requested by the
2966 * creator and/or we can inherit values from the parent dataset. If
2967 * the file system is of too early a vintage, a creator can not
2968 * request settings for these properties, even if the requested
2969 * setting is the default value. We don't actually want to create dsl
2970 * properties for these, so remove them from the source nvlist after
2971 * processing.
2972 */
2973 static int
2974 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
2975 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
2976 nvlist_t *zplprops, boolean_t *is_ci)
2977 {
2978 uint64_t sense = ZFS_PROP_UNDEFINED;
2979 uint64_t norm = ZFS_PROP_UNDEFINED;
2980 uint64_t u8 = ZFS_PROP_UNDEFINED;
2981
2982 ASSERT(zplprops != NULL);
2983
2984 /*
2985 * Pull out creator prop choices, if any.
2986 */
2987 if (createprops) {
2988 (void) nvlist_lookup_uint64(createprops,
2989 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
2990 (void) nvlist_lookup_uint64(createprops,
2991 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
2992 (void) nvlist_remove_all(createprops,
2993 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
2994 (void) nvlist_lookup_uint64(createprops,
2995 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
2996 (void) nvlist_remove_all(createprops,
2997 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
2998 (void) nvlist_lookup_uint64(createprops,
2999 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3000 (void) nvlist_remove_all(createprops,
3001 zfs_prop_to_name(ZFS_PROP_CASE));
3002 }
3003
3004 /*
3005 * If the zpl version requested is whacky or the file system
3006 * or pool is version is too "young" to support normalization
3007 * and the creator tried to set a value for one of the props,
3008 * error out.
3009 */
3010 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3011 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3012 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3013 (zplver < ZPL_VERSION_NORMALIZATION &&
3014 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3015 sense != ZFS_PROP_UNDEFINED)))
3016 return (SET_ERROR(ENOTSUP));
3017
3018 /*
3019 * Put the version in the zplprops
3020 */
3021 VERIFY(nvlist_add_uint64(zplprops,
3022 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3023
3024 if (norm == ZFS_PROP_UNDEFINED)
3025 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3026 VERIFY(nvlist_add_uint64(zplprops,
3027 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3028
3029 /*
3030 * If we're normalizing, names must always be valid UTF-8 strings.
3031 */
3032 if (norm)
3033 u8 = 1;
3034 if (u8 == ZFS_PROP_UNDEFINED)
3035 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3036 VERIFY(nvlist_add_uint64(zplprops,
3037 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3038
3039 if (sense == ZFS_PROP_UNDEFINED)
3040 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3041 VERIFY(nvlist_add_uint64(zplprops,
3042 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3043
3044 if (is_ci)
3045 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3046
3047 return (0);
3048 }
3049
3050 static int
3051 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3052 nvlist_t *zplprops, boolean_t *is_ci)
3053 {
3054 boolean_t fuids_ok, sa_ok;
3055 uint64_t zplver = ZPL_VERSION;
3056 objset_t *os = NULL;
3057 char parentname[MAXNAMELEN];
3058 char *cp;
3059 spa_t *spa;
3060 uint64_t spa_vers;
3061 int error;
3062
3063 (void) strlcpy(parentname, dataset, sizeof (parentname));
3064 cp = strrchr(parentname, '/');
3065 ASSERT(cp != NULL);
3066 cp[0] = '\0';
3067
3068 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3069 return (error);
3070
3071 spa_vers = spa_version(spa);
3072 spa_close(spa, FTAG);
3073
3074 zplver = zfs_zpl_version_map(spa_vers);
3075 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3076 sa_ok = (zplver >= ZPL_VERSION_SA);
3077
3078 /*
3079 * Open parent object set so we can inherit zplprop values.
3080 */
3081 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3082 return (error);
3083
3084 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3085 zplprops, is_ci);
3086 dmu_objset_rele(os, FTAG);
3087 return (error);
3088 }
3089
3090 static int
3091 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3092 nvlist_t *zplprops, boolean_t *is_ci)
3093 {
3094 boolean_t fuids_ok;
3095 boolean_t sa_ok;
3096 uint64_t zplver = ZPL_VERSION;
3097 int error;
3098
3099 zplver = zfs_zpl_version_map(spa_vers);
3100 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3101 sa_ok = (zplver >= ZPL_VERSION_SA);
3102
3103 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3104 createprops, zplprops, is_ci);
3105 return (error);
3106 }
3107
3108 /*
3109 * innvl: {
3110 * "type" -> dmu_objset_type_t (int32)
3111 * (optional) "props" -> { prop -> value }
3112 * }
3113 *
3114 * outnvl: propname -> error code (int32)
3115 */
3116 static int
3117 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3118 {
3119 int error = 0;
3120 zfs_creat_t zct = { 0 };
3121 nvlist_t *nvprops = NULL;
3122 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3123 int32_t type32;
3124 dmu_objset_type_t type;
3125 boolean_t is_insensitive = B_FALSE;
3126
3127 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3128 return (SET_ERROR(EINVAL));
3129 type = type32;
3130 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3131
3132 switch (type) {
3133 case DMU_OST_ZFS:
3134 cbfunc = zfs_create_cb;
3135 break;
3136
3137 case DMU_OST_ZVOL:
3138 cbfunc = zvol_create_cb;
3139 break;
3140
3141 default:
3142 cbfunc = NULL;
3143 break;
3144 }
3145 if (strchr(fsname, '@') ||
3146 strchr(fsname, '%'))
3147 return (SET_ERROR(EINVAL));
3148
3149 zct.zct_props = nvprops;
3150
3151 if (cbfunc == NULL)
3152 return (SET_ERROR(EINVAL));
3153
3154 if (type == DMU_OST_ZVOL) {
3155 uint64_t volsize, volblocksize;
3156
3157 if (nvprops == NULL)
3158 return (SET_ERROR(EINVAL));
3159 if (nvlist_lookup_uint64(nvprops,
3160 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3161 return (SET_ERROR(EINVAL));
3162
3163 if ((error = nvlist_lookup_uint64(nvprops,
3164 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3165 &volblocksize)) != 0 && error != ENOENT)
3166 return (SET_ERROR(EINVAL));
3167
3168 if (error != 0)
3169 volblocksize = zfs_prop_default_numeric(
3170 ZFS_PROP_VOLBLOCKSIZE);
3171
3172 if ((error = zvol_check_volblocksize(
3173 volblocksize)) != 0 ||
3174 (error = zvol_check_volsize(volsize,
3175 volblocksize)) != 0)
3176 return (error);
3177 } else if (type == DMU_OST_ZFS) {
3178 int error;
3179
3180 /*
3181 * We have to have normalization and
3182 * case-folding flags correct when we do the
3183 * file system creation, so go figure them out
3184 * now.
3185 */
3186 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3187 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3188 error = zfs_fill_zplprops(fsname, nvprops,
3189 zct.zct_zplprops, &is_insensitive);
3190 if (error != 0) {
3191 nvlist_free(zct.zct_zplprops);
3192 return (error);
3193 }
3194 }
3195
3196 error = dmu_objset_create(fsname, type,
3197 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3198 nvlist_free(zct.zct_zplprops);
3199
3200 /*
3201 * It would be nice to do this atomically.
3202 */
3203 if (error == 0) {
3204 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3205 nvprops, outnvl);
3206 if (error != 0)
3207 (void) dsl_destroy_head(fsname);
3208 }
3209 return (error);
3210 }
3211
3212 /*
3213 * innvl: {
3214 * "origin" -> name of origin snapshot
3215 * (optional) "props" -> { prop -> value }
3216 * }
3217 *
3218 * outnvl: propname -> error code (int32)
3219 */
3220 static int
3221 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3222 {
3223 int error = 0;
3224 nvlist_t *nvprops = NULL;
3225 char *origin_name;
3226
3227 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3228 return (SET_ERROR(EINVAL));
3229 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3230
3231 if (strchr(fsname, '@') ||
3232 strchr(fsname, '%'))
3233 return (SET_ERROR(EINVAL));
3234
3235 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3236 return (SET_ERROR(EINVAL));
3237 error = dmu_objset_clone(fsname, origin_name);
3238 if (error != 0)
3239 return (error);
3240
3241 /*
3242 * It would be nice to do this atomically.
3243 */
3244 if (error == 0) {
3245 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3246 nvprops, outnvl);
3247 if (error != 0)
3248 (void) dsl_destroy_head(fsname);
3249 }
3250 return (error);
3251 }
3252
3253 /*
3254 * innvl: {
3255 * "snaps" -> { snapshot1, snapshot2 }
3256 * (optional) "props" -> { prop -> value (string) }
3257 * }
3258 *
3259 * outnvl: snapshot -> error code (int32)
3260 */
3261 static int
3262 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3263 {
3264 nvlist_t *snaps;
3265 nvlist_t *props = NULL;
3266 int error, poollen;
3267 nvpair_t *pair;
3268
3269 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3270 if ((error = zfs_check_userprops(poolname, props)) != 0)
3271 return (error);
3272
3273 if (!nvlist_empty(props) &&
3274 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3275 return (SET_ERROR(ENOTSUP));
3276
3277 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3278 return (SET_ERROR(EINVAL));
3279 poollen = strlen(poolname);
3280 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3281 pair = nvlist_next_nvpair(snaps, pair)) {
3282 const char *name = nvpair_name(pair);
3283 const char *cp = strchr(name, '@');
3284
3285 /*
3286 * The snap name must contain an @, and the part after it must
3287 * contain only valid characters.
3288 */
3289 if (cp == NULL || snapshot_namecheck(cp + 1, NULL, NULL) != 0)
3290 return (SET_ERROR(EINVAL));
3291
3292 /*
3293 * The snap must be in the specified pool.
3294 */
3295 if (strncmp(name, poolname, poollen) != 0 ||
3296 (name[poollen] != '/' && name[poollen] != '@'))
3297 return (SET_ERROR(EXDEV));
3298
3299 /* This must be the only snap of this fs. */
3300 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3301 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3302 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3303 == 0) {
3304 return (SET_ERROR(EXDEV));
3305 }
3306 }
3307 }
3308
3309 error = dsl_dataset_snapshot(snaps, props, outnvl);
3310 return (error);
3311 }
3312
3313 /*
3314 * innvl: "message" -> string
3315 */
3316 /* ARGSUSED */
3317 static int
3318 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3319 {
3320 char *message;
3321 spa_t *spa;
3322 int error;
3323 char *poolname;
3324
3325 /*
3326 * The poolname in the ioctl is not set, we get it from the TSD,
3327 * which was set at the end of the last successful ioctl that allows
3328 * logging. The secpolicy func already checked that it is set.
3329 * Only one log ioctl is allowed after each successful ioctl, so
3330 * we clear the TSD here.
3331 */
3332 poolname = tsd_get(zfs_allow_log_key);
3333 (void) tsd_set(zfs_allow_log_key, NULL);
3334 error = spa_open(poolname, &spa, FTAG);
3335 strfree(poolname);
3336 if (error != 0)
3337 return (error);
3338
3339 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3340 spa_close(spa, FTAG);
3341 return (SET_ERROR(EINVAL));
3342 }
3343
3344 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3345 spa_close(spa, FTAG);
3346 return (SET_ERROR(ENOTSUP));
3347 }
3348
3349 error = spa_history_log(spa, message);
3350 spa_close(spa, FTAG);
3351 return (error);
3352 }
3353
3354 /*
3355 * The dp_config_rwlock must not be held when calling this, because the
3356 * unmount may need to write out data.
3357 *
3358 * This function is best-effort. Callers must deal gracefully if it
3359 * remains mounted (or is remounted after this call).
3360 *
3361 * Returns 0 if the argument is not a snapshot, or it is not currently a
3362 * filesystem, or we were able to unmount it. Returns error code otherwise.
3363 */
3364 int
3365 zfs_unmount_snap(const char *snapname)
3366 {
3367 vfs_t *vfsp;
3368 zfsvfs_t *zfsvfs;
3369 int err;
3370
3371 if (strchr(snapname, '@') == NULL)
3372 return (0);
3373
3374 vfsp = zfs_get_vfs(snapname);
3375 if (vfsp == NULL)
3376 return (0);
3377
3378 zfsvfs = vfsp->vfs_data;
3379 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3380
3381 err = vn_vfswlock(vfsp->vfs_vnodecovered);
3382 VFS_RELE(vfsp);
3383 if (err != 0)
3384 return (SET_ERROR(err));
3385
3386 /*
3387 * Always force the unmount for snapshots.
3388 */
3389 (void) dounmount(vfsp, MS_FORCE, kcred);
3390 return (0);
3391 }
3392
3393 /* ARGSUSED */
3394 static int
3395 zfs_unmount_snap_cb(const char *snapname, void *arg)
3396 {
3397 return (zfs_unmount_snap(snapname));
3398 }
3399
3400 /*
3401 * When a clone is destroyed, its origin may also need to be destroyed,
3402 * in which case it must be unmounted. This routine will do that unmount
3403 * if necessary.
3404 */
3405 void
3406 zfs_destroy_unmount_origin(const char *fsname)
3407 {
3408 int error;
3409 objset_t *os;
3410 dsl_dataset_t *ds;
3411
3412 error = dmu_objset_hold(fsname, FTAG, &os);
3413 if (error != 0)
3414 return;
3415 ds = dmu_objset_ds(os);
3416 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3417 char originname[MAXNAMELEN];
3418 dsl_dataset_name(ds->ds_prev, originname);
3419 dmu_objset_rele(os, FTAG);
3420 (void) zfs_unmount_snap(originname);
3421 } else {
3422 dmu_objset_rele(os, FTAG);
3423 }
3424 }
3425
3426 /*
3427 * innvl: {
3428 * "snaps" -> { snapshot1, snapshot2 }
3429 * (optional boolean) "defer"
3430 * }
3431 *
3432 * outnvl: snapshot -> error code (int32)
3433 *
3434 */
3435 static int
3436 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3437 {
3438 int error, poollen;
3439 nvlist_t *snaps;
3440 nvpair_t *pair;
3441 boolean_t defer;
3442
3443 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3444 return (SET_ERROR(EINVAL));
3445 defer = nvlist_exists(innvl, "defer");
3446
3447 poollen = strlen(poolname);
3448 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3449 pair = nvlist_next_nvpair(snaps, pair)) {
3450 const char *name = nvpair_name(pair);
3451
3452 /*
3453 * The snap must be in the specified pool.
3454 */
3455 if (strncmp(name, poolname, poollen) != 0 ||
3456 (name[poollen] != '/' && name[poollen] != '@'))
3457 return (SET_ERROR(EXDEV));
3458
3459 error = zfs_unmount_snap(name);
3460 if (error != 0)
3461 return (error);
3462 }
3463
3464 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3465 }
3466
3467 /*
3468 * inputs:
3469 * zc_name name of dataset to destroy
3470 * zc_objset_type type of objset
3471 * zc_defer_destroy mark for deferred destroy
3472 *
3473 * outputs: none
3474 */
3475 static int
3476 zfs_ioc_destroy(zfs_cmd_t *zc)
3477 {
3478 int err;
3479
3480 if (zc->zc_objset_type == DMU_OST_ZFS) {
3481 err = zfs_unmount_snap(zc->zc_name);
3482 if (err != 0)
3483 return (err);
3484 }
3485
3486 if (strchr(zc->zc_name, '@'))
3487 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3488 else
3489 err = dsl_destroy_head(zc->zc_name);
3490 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3491 (void) zvol_remove_minor(zc->zc_name);
3492 return (err);
3493 }
3494
3495 /*
3496 * fsname is name of dataset to rollback (to most recent snapshot)
3497 *
3498 * innvl is not used.
3499 *
3500 * outnvl: "target" -> name of most recent snapshot
3501 * }
3502 */
3503 /* ARGSUSED */
3504 static int
3505 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl)
3506 {
3507 zfsvfs_t *zfsvfs;
3508 int error;
3509
3510 if (getzfsvfs(fsname, &zfsvfs) == 0) {
3511 error = zfs_suspend_fs(zfsvfs);
3512 if (error == 0) {
3513 int resume_err;
3514
3515 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl);
3516 resume_err = zfs_resume_fs(zfsvfs, fsname);
3517 error = error ? error : resume_err;
3518 }
3519 VFS_RELE(zfsvfs->z_vfs);
3520 } else {
3521 error = dsl_dataset_rollback(fsname, NULL, outnvl);
3522 }
3523 return (error);
3524 }
3525
3526 static int
3527 recursive_unmount(const char *fsname, void *arg)
3528 {
3529 const char *snapname = arg;
3530 char fullname[MAXNAMELEN];
3531
3532 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3533 return (zfs_unmount_snap(fullname));
3534 }
3535
3536 /*
3537 * inputs:
3538 * zc_name old name of dataset
3539 * zc_value new name of dataset
3540 * zc_cookie recursive flag (only valid for snapshots)
3541 *
3542 * outputs: none
3543 */
3544 static int
3545 zfs_ioc_rename(zfs_cmd_t *zc)
3546 {
3547 boolean_t recursive = zc->zc_cookie & 1;
3548 char *at;
3549
3550 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3551 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3552 strchr(zc->zc_value, '%'))
3553 return (SET_ERROR(EINVAL));
3554
3555 at = strchr(zc->zc_name, '@');
3556 if (at != NULL) {
3557 /* snaps must be in same fs */
3558 int error;
3559
3560 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3561 return (SET_ERROR(EXDEV));
3562 *at = '\0';
3563 if (zc->zc_objset_type == DMU_OST_ZFS) {
3564 error = dmu_objset_find(zc->zc_name,
3565 recursive_unmount, at + 1,
3566 recursive ? DS_FIND_CHILDREN : 0);
3567 if (error != 0) {
3568 *at = '@';
3569 return (error);
3570 }
3571 }
3572 error = dsl_dataset_rename_snapshot(zc->zc_name,
3573 at + 1, strchr(zc->zc_value, '@') + 1, recursive);
3574 *at = '@';
3575
3576 return (error);
3577 } else {
3578 if (zc->zc_objset_type == DMU_OST_ZVOL)
3579 (void) zvol_remove_minor(zc->zc_name);
3580 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3581 }
3582 }
3583
3584 static int
3585 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3586 {
3587 const char *propname = nvpair_name(pair);
3588 boolean_t issnap = (strchr(dsname, '@') != NULL);
3589 zfs_prop_t prop = zfs_name_to_prop(propname);
3590 uint64_t intval;
3591 int err;
3592
3593 if (prop == ZPROP_INVAL) {
3594 if (zfs_prop_user(propname)) {
3595 if (err = zfs_secpolicy_write_perms(dsname,
3596 ZFS_DELEG_PERM_USERPROP, cr))
3597 return (err);
3598 return (0);
3599 }
3600
3601 if (!issnap && zfs_prop_userquota(propname)) {
3602 const char *perm = NULL;
3603 const char *uq_prefix =
3604 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3605 const char *gq_prefix =
3606 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3607
3608 if (strncmp(propname, uq_prefix,
3609 strlen(uq_prefix)) == 0) {
3610 perm = ZFS_DELEG_PERM_USERQUOTA;
3611 } else if (strncmp(propname, gq_prefix,
3612 strlen(gq_prefix)) == 0) {
3613 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3614 } else {
3615 /* USERUSED and GROUPUSED are read-only */
3616 return (SET_ERROR(EINVAL));
3617 }
3618
3619 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3620 return (err);
3621 return (0);
3622 }
3623
3624 return (SET_ERROR(EINVAL));
3625 }
3626
3627 if (issnap)
3628 return (SET_ERROR(EINVAL));
3629
3630 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3631 /*
3632 * dsl_prop_get_all_impl() returns properties in this
3633 * format.
3634 */
3635 nvlist_t *attrs;
3636 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3637 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3638 &pair) == 0);
3639 }
3640
3641 /*
3642 * Check that this value is valid for this pool version
3643 */
3644 switch (prop) {
3645 case ZFS_PROP_COMPRESSION:
3646 /*
3647 * If the user specified gzip compression, make sure
3648 * the SPA supports it. We ignore any errors here since
3649 * we'll catch them later.
3650 */
3651 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3652 nvpair_value_uint64(pair, &intval) == 0) {
3653 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3654 intval <= ZIO_COMPRESS_GZIP_9 &&
3655 zfs_earlier_version(dsname,
3656 SPA_VERSION_GZIP_COMPRESSION)) {
3657 return (SET_ERROR(ENOTSUP));
3658 }
3659
3660 if (intval == ZIO_COMPRESS_ZLE &&
3661 zfs_earlier_version(dsname,
3662 SPA_VERSION_ZLE_COMPRESSION))
3663 return (SET_ERROR(ENOTSUP));
3664
3665 if (intval == ZIO_COMPRESS_LZ4) {
3666 zfeature_info_t *feature =
3667 &spa_feature_table[
3668 SPA_FEATURE_LZ4_COMPRESS];
3669 spa_t *spa;
3670
3671 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3672 return (err);
3673
3674 if (!spa_feature_is_enabled(spa, feature)) {
3675 spa_close(spa, FTAG);
3676 return (SET_ERROR(ENOTSUP));
3677 }
3678 spa_close(spa, FTAG);
3679 }
3680
3681 /*
3682 * If this is a bootable dataset then
3683 * verify that the compression algorithm
3684 * is supported for booting. We must return
3685 * something other than ENOTSUP since it
3686 * implies a downrev pool version.
3687 */
3688 if (zfs_is_bootfs(dsname) &&
3689 !BOOTFS_COMPRESS_VALID(intval)) {
3690 return (SET_ERROR(ERANGE));
3691 }
3692 }
3693 break;
3694
3695 case ZFS_PROP_COPIES:
3696 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3697 return (SET_ERROR(ENOTSUP));
3698 break;
3699
3700 case ZFS_PROP_DEDUP:
3701 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3702 return (SET_ERROR(ENOTSUP));
3703 break;
3704
3705 case ZFS_PROP_SHARESMB:
3706 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3707 return (SET_ERROR(ENOTSUP));
3708 break;
3709
3710 case ZFS_PROP_ACLINHERIT:
3711 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3712 nvpair_value_uint64(pair, &intval) == 0) {
3713 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3714 zfs_earlier_version(dsname,
3715 SPA_VERSION_PASSTHROUGH_X))
3716 return (SET_ERROR(ENOTSUP));
3717 }
3718 break;
3719 }
3720
3721 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3722 }
3723
3724 /*
3725 * Checks for a race condition to make sure we don't increment a feature flag
3726 * multiple times.
3727 */
3728 static int
3729 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
3730 {
3731 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3732 zfeature_info_t *feature = arg;
3733
3734 if (!spa_feature_is_active(spa, feature))
3735 return (0);
3736 else
3737 return (SET_ERROR(EBUSY));
3738 }
3739
3740 /*
3741 * The callback invoked on feature activation in the sync task caused by
3742 * zfs_prop_activate_feature.
3743 */
3744 static void
3745 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
3746 {
3747 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3748 zfeature_info_t *feature = arg;
3749
3750 spa_feature_incr(spa, feature, tx);
3751 }
3752
3753 /*
3754 * Activates a feature on a pool in response to a property setting. This
3755 * creates a new sync task which modifies the pool to reflect the feature
3756 * as being active.
3757 */
3758 static int
3759 zfs_prop_activate_feature(spa_t *spa, zfeature_info_t *feature)
3760 {
3761 int err;
3762
3763 /* EBUSY here indicates that the feature is already active */
3764 err = dsl_sync_task(spa_name(spa),
3765 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
3766 feature, 2);
3767
3768 if (err != 0 && err != EBUSY)
3769 return (err);
3770 else
3771 return (0);
3772 }
3773
3774 /*
3775 * Removes properties from the given props list that fail permission checks
3776 * needed to clear them and to restore them in case of a receive error. For each
3777 * property, make sure we have both set and inherit permissions.
3778 *
3779 * Returns the first error encountered if any permission checks fail. If the
3780 * caller provides a non-NULL errlist, it also gives the complete list of names
3781 * of all the properties that failed a permission check along with the
3782 * corresponding error numbers. The caller is responsible for freeing the
3783 * returned errlist.
3784 *
3785 * If every property checks out successfully, zero is returned and the list
3786 * pointed at by errlist is NULL.
3787 */
3788 static int
3789 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3790 {
3791 zfs_cmd_t *zc;
3792 nvpair_t *pair, *next_pair;
3793 nvlist_t *errors;
3794 int err, rv = 0;
3795
3796 if (props == NULL)
3797 return (0);
3798
3799 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3800
3801 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3802 (void) strcpy(zc->zc_name, dataset);
3803 pair = nvlist_next_nvpair(props, NULL);
3804 while (pair != NULL) {
3805 next_pair = nvlist_next_nvpair(props, pair);
3806
3807 (void) strcpy(zc->zc_value, nvpair_name(pair));
3808 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3809 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
3810 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3811 VERIFY(nvlist_add_int32(errors,
3812 zc->zc_value, err) == 0);
3813 }
3814 pair = next_pair;
3815 }
3816 kmem_free(zc, sizeof (zfs_cmd_t));
3817
3818 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3819 nvlist_free(errors);
3820 errors = NULL;
3821 } else {
3822 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3823 }
3824
3825 if (errlist == NULL)
3826 nvlist_free(errors);
3827 else
3828 *errlist = errors;
3829
3830 return (rv);
3831 }
3832
3833 static boolean_t
3834 propval_equals(nvpair_t *p1, nvpair_t *p2)
3835 {
3836 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3837 /* dsl_prop_get_all_impl() format */
3838 nvlist_t *attrs;
3839 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3840 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3841 &p1) == 0);
3842 }
3843
3844 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3845 nvlist_t *attrs;
3846 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3847 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3848 &p2) == 0);
3849 }
3850
3851 if (nvpair_type(p1) != nvpair_type(p2))
3852 return (B_FALSE);
3853
3854 if (nvpair_type(p1) == DATA_TYPE_STRING) {
3855 char *valstr1, *valstr2;
3856
3857 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
3858 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
3859 return (strcmp(valstr1, valstr2) == 0);
3860 } else {
3861 uint64_t intval1, intval2;
3862
3863 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
3864 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
3865 return (intval1 == intval2);
3866 }
3867 }
3868
3869 /*
3870 * Remove properties from props if they are not going to change (as determined
3871 * by comparison with origprops). Remove them from origprops as well, since we
3872 * do not need to clear or restore properties that won't change.
3873 */
3874 static void
3875 props_reduce(nvlist_t *props, nvlist_t *origprops)
3876 {
3877 nvpair_t *pair, *next_pair;
3878
3879 if (origprops == NULL)
3880 return; /* all props need to be received */
3881
3882 pair = nvlist_next_nvpair(props, NULL);
3883 while (pair != NULL) {
3884 const char *propname = nvpair_name(pair);
3885 nvpair_t *match;
3886
3887 next_pair = nvlist_next_nvpair(props, pair);
3888
3889 if ((nvlist_lookup_nvpair(origprops, propname,
3890 &match) != 0) || !propval_equals(pair, match))
3891 goto next; /* need to set received value */
3892
3893 /* don't clear the existing received value */
3894 (void) nvlist_remove_nvpair(origprops, match);
3895 /* don't bother receiving the property */
3896 (void) nvlist_remove_nvpair(props, pair);
3897 next:
3898 pair = next_pair;
3899 }
3900 }
3901
3902 #ifdef DEBUG
3903 static boolean_t zfs_ioc_recv_inject_err;
3904 #endif
3905
3906 /*
3907 * inputs:
3908 * zc_name name of containing filesystem
3909 * zc_nvlist_src{_size} nvlist of properties to apply
3910 * zc_value name of snapshot to create
3911 * zc_string name of clone origin (if DRR_FLAG_CLONE)
3912 * zc_cookie file descriptor to recv from
3913 * zc_begin_record the BEGIN record of the stream (not byteswapped)
3914 * zc_guid force flag
3915 * zc_cleanup_fd cleanup-on-exit file descriptor
3916 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
3917 *
3918 * outputs:
3919 * zc_cookie number of bytes read
3920 * zc_nvlist_dst{_size} error for each unapplied received property
3921 * zc_obj zprop_errflags_t
3922 * zc_action_handle handle for this guid/ds mapping
3923 */
3924 static int
3925 zfs_ioc_recv(zfs_cmd_t *zc)
3926 {
3927 file_t *fp;
3928 dmu_recv_cookie_t drc;
3929 boolean_t force = (boolean_t)zc->zc_guid;
3930 int fd;
3931 int error = 0;
3932 int props_error = 0;
3933 nvlist_t *errors;
3934 offset_t off;
3935 nvlist_t *props = NULL; /* sent properties */
3936 nvlist_t *origprops = NULL; /* existing properties */
3937 char *origin = NULL;
3938 char *tosnap;
3939 char tofs[ZFS_MAXNAMELEN];
3940 boolean_t first_recvd_props = B_FALSE;
3941
3942 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3943 strchr(zc->zc_value, '@') == NULL ||
3944 strchr(zc->zc_value, '%'))
3945 return (SET_ERROR(EINVAL));
3946
3947 (void) strcpy(tofs, zc->zc_value);
3948 tosnap = strchr(tofs, '@');
3949 *tosnap++ = '\0';
3950
3951 if (zc->zc_nvlist_src != NULL &&
3952 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
3953 zc->zc_iflags, &props)) != 0)
3954 return (error);
3955
3956 fd = zc->zc_cookie;
3957 fp = getf(fd);
3958 if (fp == NULL) {
3959 nvlist_free(props);
3960 return (SET_ERROR(EBADF));
3961 }
3962
3963 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3964
3965 if (zc->zc_string[0])
3966 origin = zc->zc_string;
3967
3968 error = dmu_recv_begin(tofs, tosnap,
3969 &zc->zc_begin_record, force, origin, &drc);
3970 if (error != 0)
3971 goto out;
3972
3973 /*
3974 * Set properties before we receive the stream so that they are applied
3975 * to the new data. Note that we must call dmu_recv_stream() if
3976 * dmu_recv_begin() succeeds.
3977 */
3978 if (props != NULL && !drc.drc_newfs) {
3979 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
3980 SPA_VERSION_RECVD_PROPS &&
3981 !dsl_prop_get_hasrecvd(tofs))
3982 first_recvd_props = B_TRUE;
3983
3984 /*
3985 * If new received properties are supplied, they are to
3986 * completely replace the existing received properties, so stash
3987 * away the existing ones.
3988 */
3989 if (dsl_prop_get_received(tofs, &origprops) == 0) {
3990 nvlist_t *errlist = NULL;
3991 /*
3992 * Don't bother writing a property if its value won't
3993 * change (and avoid the unnecessary security checks).
3994 *
3995 * The first receive after SPA_VERSION_RECVD_PROPS is a
3996 * special case where we blow away all local properties
3997 * regardless.
3998 */
3999 if (!first_recvd_props)
4000 props_reduce(props, origprops);
4001 if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
4002 (void) nvlist_merge(errors, errlist, 0);
4003 nvlist_free(errlist);
4004
4005 if (clear_received_props(tofs, origprops,
4006 first_recvd_props ? NULL : props) != 0)
4007 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4008 } else {
4009 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4010 }
4011 }
4012
4013 if (props != NULL) {
4014 props_error = dsl_prop_set_hasrecvd(tofs);
4015
4016 if (props_error == 0) {
4017 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4018 props, errors);
4019 }
4020 }
4021
4022 if (zc->zc_nvlist_dst_size != 0 &&
4023 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4024 put_nvlist(zc, errors) != 0)) {
4025 /*
4026 * Caller made zc->zc_nvlist_dst less than the minimum expected
4027 * size or supplied an invalid address.
4028 */
4029 props_error = SET_ERROR(EINVAL);
4030 }
4031
4032 off = fp->f_offset;
4033 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4034 &zc->zc_action_handle);
4035
4036 if (error == 0) {
4037 zfsvfs_t *zfsvfs = NULL;
4038
4039 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4040 /* online recv */
4041 int end_err;
4042
4043 error = zfs_suspend_fs(zfsvfs);
4044 /*
4045 * If the suspend fails, then the recv_end will
4046 * likely also fail, and clean up after itself.
4047 */
4048 end_err = dmu_recv_end(&drc, zfsvfs);
4049 if (error == 0)
4050 error = zfs_resume_fs(zfsvfs, tofs);
4051 error = error ? error : end_err;
4052 VFS_RELE(zfsvfs->z_vfs);
4053 } else {
4054 error = dmu_recv_end(&drc, NULL);
4055 }
4056 }
4057
4058 zc->zc_cookie = off - fp->f_offset;
4059 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4060 fp->f_offset = off;
4061
4062 #ifdef DEBUG
4063 if (zfs_ioc_recv_inject_err) {
4064 zfs_ioc_recv_inject_err = B_FALSE;
4065 error = 1;
4066 }
4067 #endif
4068 /*
4069 * On error, restore the original props.
4070 */
4071 if (error != 0 && props != NULL && !drc.drc_newfs) {
4072 if (clear_received_props(tofs, props, NULL) != 0) {
4073 /*
4074 * We failed to clear the received properties.
4075 * Since we may have left a $recvd value on the
4076 * system, we can't clear the $hasrecvd flag.
4077 */
4078 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4079 } else if (first_recvd_props) {
4080 dsl_prop_unset_hasrecvd(tofs);
4081 }
4082
4083 if (origprops == NULL && !drc.drc_newfs) {
4084 /* We failed to stash the original properties. */
4085 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4086 }
4087
4088 /*
4089 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4090 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4091 * explictly if we're restoring local properties cleared in the
4092 * first new-style receive.
4093 */
4094 if (origprops != NULL &&
4095 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4096 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4097 origprops, NULL) != 0) {
4098 /*
4099 * We stashed the original properties but failed to
4100 * restore them.
4101 */
4102 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4103 }
4104 }
4105 out:
4106 nvlist_free(props);
4107 nvlist_free(origprops);
4108 nvlist_free(errors);
4109 releasef(fd);
4110
4111 if (error == 0)
4112 error = props_error;
4113
4114 return (error);
4115 }
4116
4117 /*
4118 * inputs:
4119 * zc_name name of snapshot to send
4120 * zc_cookie file descriptor to send stream to
4121 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4122 * zc_sendobj objsetid of snapshot to send
4123 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4124 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4125 * output size in zc_objset_type.
4126 *
4127 * outputs: none
4128 */
4129 static int
4130 zfs_ioc_send(zfs_cmd_t *zc)
4131 {
4132 int error;
4133 offset_t off;
4134 boolean_t estimate = (zc->zc_guid != 0);
4135
4136 if (zc->zc_obj != 0) {
4137 dsl_pool_t *dp;
4138 dsl_dataset_t *tosnap;
4139
4140 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4141 if (error != 0)
4142 return (error);
4143
4144 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4145 if (error != 0) {
4146 dsl_pool_rele(dp, FTAG);
4147 return (error);
4148 }
4149
4150 if (dsl_dir_is_clone(tosnap->ds_dir))
4151 zc->zc_fromobj = tosnap->ds_dir->dd_phys->dd_origin_obj;
4152 dsl_dataset_rele(tosnap, FTAG);
4153 dsl_pool_rele(dp, FTAG);
4154 }
4155
4156 if (estimate) {
4157 dsl_pool_t *dp;
4158 dsl_dataset_t *tosnap;
4159 dsl_dataset_t *fromsnap = NULL;
4160
4161 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4162 if (error != 0)
4163 return (error);
4164
4165 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4166 if (error != 0) {
4167 dsl_pool_rele(dp, FTAG);
4168 return (error);
4169 }
4170
4171 if (zc->zc_fromobj != 0) {
4172 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4173 FTAG, &fromsnap);
4174 if (error != 0) {
4175 dsl_dataset_rele(tosnap, FTAG);
4176 dsl_pool_rele(dp, FTAG);
4177 return (error);
4178 }
4179 }
4180
4181 error = dmu_send_estimate(tosnap, fromsnap,
4182 &zc->zc_objset_type);
4183
4184 if (fromsnap != NULL)
4185 dsl_dataset_rele(fromsnap, FTAG);
4186 dsl_dataset_rele(tosnap, FTAG);
4187 dsl_pool_rele(dp, FTAG);
4188 } else {
4189 file_t *fp = getf(zc->zc_cookie);
4190 if (fp == NULL)
4191 return (SET_ERROR(EBADF));
4192
4193 off = fp->f_offset;
4194 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4195 zc->zc_fromobj, zc->zc_cookie, fp->f_vnode, &off);
4196
4197 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4198 fp->f_offset = off;
4199 releasef(zc->zc_cookie);
4200 }
4201 return (error);
4202 }
4203
4204 /*
4205 * inputs:
4206 * zc_name name of snapshot on which to report progress
4207 * zc_cookie file descriptor of send stream
4208 *
4209 * outputs:
4210 * zc_cookie number of bytes written in send stream thus far
4211 */
4212 static int
4213 zfs_ioc_send_progress(zfs_cmd_t *zc)
4214 {
4215 dsl_pool_t *dp;
4216 dsl_dataset_t *ds;
4217 dmu_sendarg_t *dsp = NULL;
4218 int error;
4219
4220 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4221 if (error != 0)
4222 return (error);
4223
4224 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4225 if (error != 0) {
4226 dsl_pool_rele(dp, FTAG);
4227 return (error);
4228 }
4229
4230 mutex_enter(&ds->ds_sendstream_lock);
4231
4232 /*
4233 * Iterate over all the send streams currently active on this dataset.
4234 * If there's one which matches the specified file descriptor _and_ the
4235 * stream was started by the current process, return the progress of
4236 * that stream.
4237 */
4238 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4239 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4240 if (dsp->dsa_outfd == zc->zc_cookie &&
4241 dsp->dsa_proc == curproc)
4242 break;
4243 }
4244
4245 if (dsp != NULL)
4246 zc->zc_cookie = *(dsp->dsa_off);
4247 else
4248 error = SET_ERROR(ENOENT);
4249
4250 mutex_exit(&ds->ds_sendstream_lock);
4251 dsl_dataset_rele(ds, FTAG);
4252 dsl_pool_rele(dp, FTAG);
4253 return (error);
4254 }
4255
4256 static int
4257 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4258 {
4259 int id, error;
4260
4261 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4262 &zc->zc_inject_record);
4263
4264 if (error == 0)
4265 zc->zc_guid = (uint64_t)id;
4266
4267 return (error);
4268 }
4269
4270 static int
4271 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4272 {
4273 return (zio_clear_fault((int)zc->zc_guid));
4274 }
4275
4276 static int
4277 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4278 {
4279 int id = (int)zc->zc_guid;
4280 int error;
4281
4282 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4283 &zc->zc_inject_record);
4284
4285 zc->zc_guid = id;
4286
4287 return (error);
4288 }
4289
4290 static int
4291 zfs_ioc_error_log(zfs_cmd_t *zc)
4292 {
4293 spa_t *spa;
4294 int error;
4295 size_t count = (size_t)zc->zc_nvlist_dst_size;
4296
4297 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4298 return (error);
4299
4300 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4301 &count);
4302 if (error == 0)
4303 zc->zc_nvlist_dst_size = count;
4304 else
4305 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4306
4307 spa_close(spa, FTAG);
4308
4309 return (error);
4310 }
4311
4312 static int
4313 zfs_ioc_clear(zfs_cmd_t *zc)
4314 {
4315 spa_t *spa;
4316 vdev_t *vd;
4317 int error;
4318
4319 /*
4320 * On zpool clear we also fix up missing slogs
4321 */
4322 mutex_enter(&spa_namespace_lock);
4323 spa = spa_lookup(zc->zc_name);
4324 if (spa == NULL) {
4325 mutex_exit(&spa_namespace_lock);
4326 return (SET_ERROR(EIO));
4327 }
4328 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4329 /* we need to let spa_open/spa_load clear the chains */
4330 spa_set_log_state(spa, SPA_LOG_CLEAR);
4331 }
4332 spa->spa_last_open_failed = 0;
4333 mutex_exit(&spa_namespace_lock);
4334
4335 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4336 error = spa_open(zc->zc_name, &spa, FTAG);
4337 } else {
4338 nvlist_t *policy;
4339 nvlist_t *config = NULL;
4340
4341 if (zc->zc_nvlist_src == NULL)
4342 return (SET_ERROR(EINVAL));
4343
4344 if ((error = get_nvlist(zc->zc_nvlist_src,
4345 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4346 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4347 policy, &config);
4348 if (config != NULL) {
4349 int err;
4350
4351 if ((err = put_nvlist(zc, config)) != 0)
4352 error = err;
4353 nvlist_free(config);
4354 }
4355 nvlist_free(policy);
4356 }
4357 }
4358
4359 if (error != 0)
4360 return (error);
4361
4362 spa_vdev_state_enter(spa, SCL_NONE);
4363
4364 if (zc->zc_guid == 0) {
4365 vd = NULL;
4366 } else {
4367 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4368 if (vd == NULL) {
4369 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4370 spa_close(spa, FTAG);
4371 return (SET_ERROR(ENODEV));
4372 }
4373 }
4374
4375 vdev_clear(spa, vd);
4376
4377 (void) spa_vdev_state_exit(spa, NULL, 0);
4378
4379 /*
4380 * Resume any suspended I/Os.
4381 */
4382 if (zio_resume(spa) != 0)
4383 error = SET_ERROR(EIO);
4384
4385 spa_close(spa, FTAG);
4386
4387 return (error);
4388 }
4389
4390 static int
4391 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4392 {
4393 spa_t *spa;
4394 int error;
4395
4396 error = spa_open(zc->zc_name, &spa, FTAG);
4397 if (error != 0)
4398 return (error);
4399
4400 spa_vdev_state_enter(spa, SCL_NONE);
4401
4402 /*
4403 * If a resilver is already in progress then set the
4404 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4405 * the scan as a side effect of the reopen. Otherwise, let
4406 * vdev_open() decided if a resilver is required.
4407 */
4408 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4409 vdev_reopen(spa->spa_root_vdev);
4410 spa->spa_scrub_reopen = B_FALSE;
4411
4412 (void) spa_vdev_state_exit(spa, NULL, 0);
4413 spa_close(spa, FTAG);
4414 return (0);
4415 }
4416 /*
4417 * inputs:
4418 * zc_name name of filesystem
4419 * zc_value name of origin snapshot
4420 *
4421 * outputs:
4422 * zc_string name of conflicting snapshot, if there is one
4423 */
4424 static int
4425 zfs_ioc_promote(zfs_cmd_t *zc)
4426 {
4427 char *cp;
4428
4429 /*
4430 * We don't need to unmount *all* the origin fs's snapshots, but
4431 * it's easier.
4432 */
4433 cp = strchr(zc->zc_value, '@');
4434 if (cp)
4435 *cp = '\0';
4436 (void) dmu_objset_find(zc->zc_value,
4437 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4438 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4439 }
4440
4441 /*
4442 * Retrieve a single {user|group}{used|quota}@... property.
4443 *
4444 * inputs:
4445 * zc_name name of filesystem
4446 * zc_objset_type zfs_userquota_prop_t
4447 * zc_value domain name (eg. "S-1-234-567-89")
4448 * zc_guid RID/UID/GID
4449 *
4450 * outputs:
4451 * zc_cookie property value
4452 */
4453 static int
4454 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4455 {
4456 zfsvfs_t *zfsvfs;
4457 int error;
4458
4459 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4460 return (SET_ERROR(EINVAL));
4461
4462 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4463 if (error != 0)
4464 return (error);
4465
4466 error = zfs_userspace_one(zfsvfs,
4467 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4468 zfsvfs_rele(zfsvfs, FTAG);
4469
4470 return (error);
4471 }
4472
4473 /*
4474 * inputs:
4475 * zc_name name of filesystem
4476 * zc_cookie zap cursor
4477 * zc_objset_type zfs_userquota_prop_t
4478 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4479 *
4480 * outputs:
4481 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4482 * zc_cookie zap cursor
4483 */
4484 static int
4485 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4486 {
4487 zfsvfs_t *zfsvfs;
4488 int bufsize = zc->zc_nvlist_dst_size;
4489
4490 if (bufsize <= 0)
4491 return (SET_ERROR(ENOMEM));
4492
4493 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4494 if (error != 0)
4495 return (error);
4496
4497 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4498
4499 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4500 buf, &zc->zc_nvlist_dst_size);
4501
4502 if (error == 0) {
4503 error = xcopyout(buf,
4504 (void *)(uintptr_t)zc->zc_nvlist_dst,
4505 zc->zc_nvlist_dst_size);
4506 }
4507 kmem_free(buf, bufsize);
4508 zfsvfs_rele(zfsvfs, FTAG);
4509
4510 return (error);
4511 }
4512
4513 /*
4514 * inputs:
4515 * zc_name name of filesystem
4516 *
4517 * outputs:
4518 * none
4519 */
4520 static int
4521 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4522 {
4523 objset_t *os;
4524 int error = 0;
4525 zfsvfs_t *zfsvfs;
4526
4527 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4528 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4529 /*
4530 * If userused is not enabled, it may be because the
4531 * objset needs to be closed & reopened (to grow the
4532 * objset_phys_t). Suspend/resume the fs will do that.
4533 */
4534 error = zfs_suspend_fs(zfsvfs);
4535 if (error == 0) {
4536 dmu_objset_refresh_ownership(zfsvfs->z_os,
4537 zfsvfs);
4538 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4539 }
4540 }
4541 if (error == 0)
4542 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4543 VFS_RELE(zfsvfs->z_vfs);
4544 } else {
4545 /* XXX kind of reading contents without owning */
4546 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4547 if (error != 0)
4548 return (error);
4549
4550 error = dmu_objset_userspace_upgrade(os);
4551 dmu_objset_rele(os, FTAG);
4552 }
4553
4554 return (error);
4555 }
4556
4557 /*
4558 * We don't want to have a hard dependency
4559 * against some special symbols in sharefs
4560 * nfs, and smbsrv. Determine them if needed when
4561 * the first file system is shared.
4562 * Neither sharefs, nfs or smbsrv are unloadable modules.
4563 */
4564 int (*znfsexport_fs)(void *arg);
4565 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4566 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4567
4568 int zfs_nfsshare_inited;
4569 int zfs_smbshare_inited;
4570
4571 ddi_modhandle_t nfs_mod;
4572 ddi_modhandle_t sharefs_mod;
4573 ddi_modhandle_t smbsrv_mod;
4574 kmutex_t zfs_share_lock;
4575
4576 static int
4577 zfs_init_sharefs()
4578 {
4579 int error;
4580
4581 ASSERT(MUTEX_HELD(&zfs_share_lock));
4582 /* Both NFS and SMB shares also require sharetab support. */
4583 if (sharefs_mod == NULL && ((sharefs_mod =
4584 ddi_modopen("fs/sharefs",
4585 KRTLD_MODE_FIRST, &error)) == NULL)) {
4586 return (SET_ERROR(ENOSYS));
4587 }
4588 if (zshare_fs == NULL && ((zshare_fs =
4589 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4590 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4591 return (SET_ERROR(ENOSYS));
4592 }
4593 return (0);
4594 }
4595
4596 static int
4597 zfs_ioc_share(zfs_cmd_t *zc)
4598 {
4599 int error;
4600 int opcode;
4601
4602 switch (zc->zc_share.z_sharetype) {
4603 case ZFS_SHARE_NFS:
4604 case ZFS_UNSHARE_NFS:
4605 if (zfs_nfsshare_inited == 0) {
4606 mutex_enter(&zfs_share_lock);
4607 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4608 KRTLD_MODE_FIRST, &error)) == NULL)) {
4609 mutex_exit(&zfs_share_lock);
4610 return (SET_ERROR(ENOSYS));
4611 }
4612 if (znfsexport_fs == NULL &&
4613 ((znfsexport_fs = (int (*)(void *))
4614 ddi_modsym(nfs_mod,
4615 "nfs_export", &error)) == NULL)) {
4616 mutex_exit(&zfs_share_lock);
4617 return (SET_ERROR(ENOSYS));
4618 }
4619 error = zfs_init_sharefs();
4620 if (error != 0) {
4621 mutex_exit(&zfs_share_lock);
4622 return (SET_ERROR(ENOSYS));
4623 }
4624 zfs_nfsshare_inited = 1;
4625 mutex_exit(&zfs_share_lock);
4626 }
4627 break;
4628 case ZFS_SHARE_SMB:
4629 case ZFS_UNSHARE_SMB:
4630 if (zfs_smbshare_inited == 0) {
4631 mutex_enter(&zfs_share_lock);
4632 if (smbsrv_mod == NULL && ((smbsrv_mod =
4633 ddi_modopen("drv/smbsrv",
4634 KRTLD_MODE_FIRST, &error)) == NULL)) {
4635 mutex_exit(&zfs_share_lock);
4636 return (SET_ERROR(ENOSYS));
4637 }
4638 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4639 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4640 "smb_server_share", &error)) == NULL)) {
4641 mutex_exit(&zfs_share_lock);
4642 return (SET_ERROR(ENOSYS));
4643 }
4644 error = zfs_init_sharefs();
4645 if (error != 0) {
4646 mutex_exit(&zfs_share_lock);
4647 return (SET_ERROR(ENOSYS));
4648 }
4649 zfs_smbshare_inited = 1;
4650 mutex_exit(&zfs_share_lock);
4651 }
4652 break;
4653 default:
4654 return (SET_ERROR(EINVAL));
4655 }
4656
4657 switch (zc->zc_share.z_sharetype) {
4658 case ZFS_SHARE_NFS:
4659 case ZFS_UNSHARE_NFS:
4660 if (error =
4661 znfsexport_fs((void *)
4662 (uintptr_t)zc->zc_share.z_exportdata))
4663 return (error);
4664 break;
4665 case ZFS_SHARE_SMB:
4666 case ZFS_UNSHARE_SMB:
4667 if (error = zsmbexport_fs((void *)
4668 (uintptr_t)zc->zc_share.z_exportdata,
4669 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4670 B_TRUE: B_FALSE)) {
4671 return (error);
4672 }
4673 break;
4674 }
4675
4676 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4677 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4678 SHAREFS_ADD : SHAREFS_REMOVE;
4679
4680 /*
4681 * Add or remove share from sharetab
4682 */
4683 error = zshare_fs(opcode,
4684 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4685 zc->zc_share.z_sharemax);
4686
4687 return (error);
4688
4689 }
4690
4691 ace_t full_access[] = {
4692 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4693 };
4694
4695 /*
4696 * inputs:
4697 * zc_name name of containing filesystem
4698 * zc_obj object # beyond which we want next in-use object #
4699 *
4700 * outputs:
4701 * zc_obj next in-use object #
4702 */
4703 static int
4704 zfs_ioc_next_obj(zfs_cmd_t *zc)
4705 {
4706 objset_t *os = NULL;
4707 int error;
4708
4709 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4710 if (error != 0)
4711 return (error);
4712
4713 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4714 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4715
4716 dmu_objset_rele(os, FTAG);
4717 return (error);
4718 }
4719
4720 /*
4721 * inputs:
4722 * zc_name name of filesystem
4723 * zc_value prefix name for snapshot
4724 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4725 *
4726 * outputs:
4727 * zc_value short name of new snapshot
4728 */
4729 static int
4730 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4731 {
4732 char *snap_name;
4733 char *hold_name;
4734 int error;
4735 minor_t minor;
4736
4737 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
4738 if (error != 0)
4739 return (error);
4740
4741 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
4742 (u_longlong_t)ddi_get_lbolt64());
4743 hold_name = kmem_asprintf("%%%s", zc->zc_value);
4744
4745 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
4746 hold_name);
4747 if (error == 0)
4748 (void) strcpy(zc->zc_value, snap_name);
4749 strfree(snap_name);
4750 strfree(hold_name);
4751 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
4752 return (error);
4753 }
4754
4755 /*
4756 * inputs:
4757 * zc_name name of "to" snapshot
4758 * zc_value name of "from" snapshot
4759 * zc_cookie file descriptor to write diff data on
4760 *
4761 * outputs:
4762 * dmu_diff_record_t's to the file descriptor
4763 */
4764 static int
4765 zfs_ioc_diff(zfs_cmd_t *zc)
4766 {
4767 file_t *fp;
4768 offset_t off;
4769 int error;
4770
4771 fp = getf(zc->zc_cookie);
4772 if (fp == NULL)
4773 return (SET_ERROR(EBADF));
4774
4775 off = fp->f_offset;
4776
4777 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
4778
4779 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4780 fp->f_offset = off;
4781 releasef(zc->zc_cookie);
4782
4783 return (error);
4784 }
4785
4786 /*
4787 * Remove all ACL files in shares dir
4788 */
4789 static int
4790 zfs_smb_acl_purge(znode_t *dzp)
4791 {
4792 zap_cursor_t zc;
4793 zap_attribute_t zap;
4794 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4795 int error;
4796
4797 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4798 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4799 zap_cursor_advance(&zc)) {
4800 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4801 NULL, 0)) != 0)
4802 break;
4803 }
4804 zap_cursor_fini(&zc);
4805 return (error);
4806 }
4807
4808 static int
4809 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4810 {
4811 vnode_t *vp;
4812 znode_t *dzp;
4813 vnode_t *resourcevp = NULL;
4814 znode_t *sharedir;
4815 zfsvfs_t *zfsvfs;
4816 nvlist_t *nvlist;
4817 char *src, *target;
4818 vattr_t vattr;
4819 vsecattr_t vsec;
4820 int error = 0;
4821
4822 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4823 NO_FOLLOW, NULL, &vp)) != 0)
4824 return (error);
4825
4826 /* Now make sure mntpnt and dataset are ZFS */
4827
4828 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4829 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4830 zc->zc_name) != 0)) {
4831 VN_RELE(vp);
4832 return (SET_ERROR(EINVAL));
4833 }
4834
4835 dzp = VTOZ(vp);
4836 zfsvfs = dzp->z_zfsvfs;
4837 ZFS_ENTER(zfsvfs);
4838
4839 /*
4840 * Create share dir if its missing.
4841 */
4842 mutex_enter(&zfsvfs->z_lock);
4843 if (zfsvfs->z_shares_dir == 0) {
4844 dmu_tx_t *tx;
4845
4846 tx = dmu_tx_create(zfsvfs->z_os);
4847 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
4848 ZFS_SHARES_DIR);
4849 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
4850 error = dmu_tx_assign(tx, TXG_WAIT);
4851 if (error != 0) {
4852 dmu_tx_abort(tx);
4853 } else {
4854 error = zfs_create_share_dir(zfsvfs, tx);
4855 dmu_tx_commit(tx);
4856 }
4857 if (error != 0) {
4858 mutex_exit(&zfsvfs->z_lock);
4859 VN_RELE(vp);
4860 ZFS_EXIT(zfsvfs);
4861 return (error);
4862 }
4863 }
4864 mutex_exit(&zfsvfs->z_lock);
4865
4866 ASSERT(zfsvfs->z_shares_dir);
4867 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
4868 VN_RELE(vp);
4869 ZFS_EXIT(zfsvfs);
4870 return (error);
4871 }
4872
4873 switch (zc->zc_cookie) {
4874 case ZFS_SMB_ACL_ADD:
4875 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
4876 vattr.va_type = VREG;
4877 vattr.va_mode = S_IFREG|0777;
4878 vattr.va_uid = 0;
4879 vattr.va_gid = 0;
4880
4881 vsec.vsa_mask = VSA_ACE;
4882 vsec.vsa_aclentp = &full_access;
4883 vsec.vsa_aclentsz = sizeof (full_access);
4884 vsec.vsa_aclcnt = 1;
4885
4886 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
4887 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
4888 if (resourcevp)
4889 VN_RELE(resourcevp);
4890 break;
4891
4892 case ZFS_SMB_ACL_REMOVE:
4893 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
4894 NULL, 0);
4895 break;
4896
4897 case ZFS_SMB_ACL_RENAME:
4898 if ((error = get_nvlist(zc->zc_nvlist_src,
4899 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
4900 VN_RELE(vp);
4901 ZFS_EXIT(zfsvfs);
4902 return (error);
4903 }
4904 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
4905 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
4906 &target)) {
4907 VN_RELE(vp);
4908 VN_RELE(ZTOV(sharedir));
4909 ZFS_EXIT(zfsvfs);
4910 nvlist_free(nvlist);
4911 return (error);
4912 }
4913 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
4914 kcred, NULL, 0);
4915 nvlist_free(nvlist);
4916 break;
4917
4918 case ZFS_SMB_ACL_PURGE:
4919 error = zfs_smb_acl_purge(sharedir);
4920 break;
4921
4922 default:
4923 error = SET_ERROR(EINVAL);
4924 break;
4925 }
4926
4927 VN_RELE(vp);
4928 VN_RELE(ZTOV(sharedir));
4929
4930 ZFS_EXIT(zfsvfs);
4931
4932 return (error);
4933 }
4934
4935 /*
4936 * innvl: {
4937 * "holds" -> { snapname -> holdname (string), ... }
4938 * (optional) "cleanup_fd" -> fd (int32)
4939 * }
4940 *
4941 * outnvl: {
4942 * snapname -> error value (int32)
4943 * ...
4944 * }
4945 */
4946 /* ARGSUSED */
4947 static int
4948 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
4949 {
4950 nvlist_t *holds;
4951 int cleanup_fd = -1;
4952 int error;
4953 minor_t minor = 0;
4954
4955 error = nvlist_lookup_nvlist(args, "holds", &holds);
4956 if (error != 0)
4957 return (SET_ERROR(EINVAL));
4958
4959 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
4960 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
4961 if (error != 0)
4962 return (error);
4963 }
4964
4965 error = dsl_dataset_user_hold(holds, minor, errlist);
4966 if (minor != 0)
4967 zfs_onexit_fd_rele(cleanup_fd);
4968 return (error);
4969 }
4970
4971 /*
4972 * innvl is not used.
4973 *
4974 * outnvl: {
4975 * holdname -> time added (uint64 seconds since epoch)
4976 * ...
4977 * }
4978 */
4979 /* ARGSUSED */
4980 static int
4981 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
4982 {
4983 return (dsl_dataset_get_holds(snapname, outnvl));
4984 }
4985
4986 /*
4987 * innvl: {
4988 * snapname -> { holdname, ... }
4989 * ...
4990 * }
4991 *
4992 * outnvl: {
4993 * snapname -> error value (int32)
4994 * ...
4995 * }
4996 */
4997 /* ARGSUSED */
4998 static int
4999 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
5000 {
5001 return (dsl_dataset_user_release(holds, errlist));
5002 }
5003
5004 /*
5005 * inputs:
5006 * zc_name name of new filesystem or snapshot
5007 * zc_value full name of old snapshot
5008 *
5009 * outputs:
5010 * zc_cookie space in bytes
5011 * zc_objset_type compressed space in bytes
5012 * zc_perm_action uncompressed space in bytes
5013 */
5014 static int
5015 zfs_ioc_space_written(zfs_cmd_t *zc)
5016 {
5017 int error;
5018 dsl_pool_t *dp;
5019 dsl_dataset_t *new, *old;
5020
5021 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5022 if (error != 0)
5023 return (error);
5024 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5025 if (error != 0) {
5026 dsl_pool_rele(dp, FTAG);
5027 return (error);
5028 }
5029 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5030 if (error != 0) {
5031 dsl_dataset_rele(new, FTAG);
5032 dsl_pool_rele(dp, FTAG);
5033 return (error);
5034 }
5035
5036 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5037 &zc->zc_objset_type, &zc->zc_perm_action);
5038 dsl_dataset_rele(old, FTAG);
5039 dsl_dataset_rele(new, FTAG);
5040 dsl_pool_rele(dp, FTAG);
5041 return (error);
5042 }
5043
5044 /*
5045 * innvl: {
5046 * "firstsnap" -> snapshot name
5047 * }
5048 *
5049 * outnvl: {
5050 * "used" -> space in bytes
5051 * "compressed" -> compressed space in bytes
5052 * "uncompressed" -> uncompressed space in bytes
5053 * }
5054 */
5055 static int
5056 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5057 {
5058 int error;
5059 dsl_pool_t *dp;
5060 dsl_dataset_t *new, *old;
5061 char *firstsnap;
5062 uint64_t used, comp, uncomp;
5063
5064 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5065 return (SET_ERROR(EINVAL));
5066
5067 error = dsl_pool_hold(lastsnap, FTAG, &dp);
5068 if (error != 0)
5069 return (error);
5070
5071 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5072 if (error != 0) {
5073 dsl_pool_rele(dp, FTAG);
5074 return (error);
5075 }
5076 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5077 if (error != 0) {
5078 dsl_dataset_rele(new, FTAG);
5079 dsl_pool_rele(dp, FTAG);
5080 return (error);
5081 }
5082
5083 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5084 dsl_dataset_rele(old, FTAG);
5085 dsl_dataset_rele(new, FTAG);
5086 dsl_pool_rele(dp, FTAG);
5087 fnvlist_add_uint64(outnvl, "used", used);
5088 fnvlist_add_uint64(outnvl, "compressed", comp);
5089 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5090 return (error);
5091 }
5092
5093 /*
5094 * innvl: {
5095 * "fd" -> file descriptor to write stream to (int32)
5096 * (optional) "fromsnap" -> full snap name to send an incremental from
5097 * }
5098 *
5099 * outnvl is unused
5100 */
5101 /* ARGSUSED */
5102 static int
5103 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5104 {
5105 int error;
5106 offset_t off;
5107 char *fromname = NULL;
5108 int fd;
5109
5110 error = nvlist_lookup_int32(innvl, "fd", &fd);
5111 if (error != 0)
5112 return (SET_ERROR(EINVAL));
5113
5114 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5115
5116 file_t *fp = getf(fd);
5117 if (fp == NULL)
5118 return (SET_ERROR(EBADF));
5119
5120 off = fp->f_offset;
5121 error = dmu_send(snapname, fromname, fd, fp->f_vnode, &off);
5122
5123 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5124 fp->f_offset = off;
5125 releasef(fd);
5126 return (error);
5127 }
5128
5129 /*
5130 * Determine approximately how large a zfs send stream will be -- the number
5131 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5132 *
5133 * innvl: {
5134 * (optional) "fromsnap" -> full snap name to send an incremental from
5135 * }
5136 *
5137 * outnvl: {
5138 * "space" -> bytes of space (uint64)
5139 * }
5140 */
5141 static int
5142 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5143 {
5144 dsl_pool_t *dp;
5145 dsl_dataset_t *fromsnap = NULL;
5146 dsl_dataset_t *tosnap;
5147 int error;
5148 char *fromname;
5149 uint64_t space;
5150
5151 error = dsl_pool_hold(snapname, FTAG, &dp);
5152 if (error != 0)
5153 return (error);
5154
5155 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5156 if (error != 0) {
5157 dsl_pool_rele(dp, FTAG);
5158 return (error);
5159 }
5160
5161 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5162 if (error == 0) {
5163 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5164 if (error != 0) {
5165 dsl_dataset_rele(tosnap, FTAG);
5166 dsl_pool_rele(dp, FTAG);
5167 return (error);
5168 }
5169 }
5170
5171 error = dmu_send_estimate(tosnap, fromsnap, &space);
5172 fnvlist_add_uint64(outnvl, "space", space);
5173
5174 if (fromsnap != NULL)
5175 dsl_dataset_rele(fromsnap, FTAG);
5176 dsl_dataset_rele(tosnap, FTAG);
5177 dsl_pool_rele(dp, FTAG);
5178 return (error);
5179 }
5180
5181
5182 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5183
5184 static void
5185 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5186 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5187 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5188 {
5189 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5190
5191 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5192 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5193 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5194 ASSERT3P(vec->zvec_func, ==, NULL);
5195
5196 vec->zvec_legacy_func = func;
5197 vec->zvec_secpolicy = secpolicy;
5198 vec->zvec_namecheck = namecheck;
5199 vec->zvec_allow_log = log_history;
5200 vec->zvec_pool_check = pool_check;
5201 }
5202
5203 /*
5204 * See the block comment at the beginning of this file for details on
5205 * each argument to this function.
5206 */
5207 static void
5208 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5209 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5210 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5211 boolean_t allow_log)
5212 {
5213 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5214
5215 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5216 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5217 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5218 ASSERT3P(vec->zvec_func, ==, NULL);
5219
5220 /* if we are logging, the name must be valid */
5221 ASSERT(!allow_log || namecheck != NO_NAME);
5222
5223 vec->zvec_name = name;
5224 vec->zvec_func = func;
5225 vec->zvec_secpolicy = secpolicy;
5226 vec->zvec_namecheck = namecheck;
5227 vec->zvec_pool_check = pool_check;
5228 vec->zvec_smush_outnvlist = smush_outnvlist;
5229 vec->zvec_allow_log = allow_log;
5230 }
5231
5232 static void
5233 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5234 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5235 zfs_ioc_poolcheck_t pool_check)
5236 {
5237 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5238 POOL_NAME, log_history, pool_check);
5239 }
5240
5241 static void
5242 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5243 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5244 {
5245 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5246 DATASET_NAME, B_FALSE, pool_check);
5247 }
5248
5249 static void
5250 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5251 {
5252 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5253 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5254 }
5255
5256 static void
5257 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5258 zfs_secpolicy_func_t *secpolicy)
5259 {
5260 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5261 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5262 }
5263
5264 static void
5265 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5266 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5267 {
5268 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5269 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5270 }
5271
5272 static void
5273 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5274 {
5275 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5276 zfs_secpolicy_read);
5277 }
5278
5279 static void
5280 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5281 zfs_secpolicy_func_t *secpolicy)
5282 {
5283 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5284 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5285 }
5286
5287 static void
5288 zfs_ioctl_init(void)
5289 {
5290 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5291 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5292 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5293
5294 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5295 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5296 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5297
5298 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5299 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5300 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5301
5302 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5303 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5304 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5305
5306 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5307 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5308 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5309
5310 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5311 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5312 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5313
5314 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5315 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5316 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5317
5318 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5319 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5320 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5321
5322 zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5323 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5324 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5325 zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5326 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5327 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5328
5329 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5330 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5331 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5332
5333 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
5334 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
5335 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5336
5337 /* IOCTLS that use the legacy function signature */
5338
5339 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5340 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5341
5342 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5343 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5344 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5345 zfs_ioc_pool_scan);
5346 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5347 zfs_ioc_pool_upgrade);
5348 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5349 zfs_ioc_vdev_add);
5350 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5351 zfs_ioc_vdev_remove);
5352 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5353 zfs_ioc_vdev_set_state);
5354 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5355 zfs_ioc_vdev_attach);
5356 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5357 zfs_ioc_vdev_detach);
5358 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5359 zfs_ioc_vdev_setpath);
5360 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5361 zfs_ioc_vdev_setfru);
5362 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5363 zfs_ioc_pool_set_props);
5364 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5365 zfs_ioc_vdev_split);
5366 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5367 zfs_ioc_pool_reguid);
5368
5369 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5370 zfs_ioc_pool_configs, zfs_secpolicy_none);
5371 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5372 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5373 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5374 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5375 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5376 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5377 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5378 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5379
5380 /*
5381 * pool destroy, and export don't log the history as part of
5382 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5383 * does the logging of those commands.
5384 */
5385 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5386 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5387 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5388 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5389
5390 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5391 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5392 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5393 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5394
5395 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5396 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5397 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5398 zfs_ioc_dsobj_to_dsname,
5399 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5400 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5401 zfs_ioc_pool_get_history,
5402 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5403
5404 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5405 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5406
5407 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5408 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5409 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5410 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5411
5412 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5413 zfs_ioc_space_written);
5414 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5415 zfs_ioc_objset_recvd_props);
5416 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5417 zfs_ioc_next_obj);
5418 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5419 zfs_ioc_get_fsacl);
5420 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5421 zfs_ioc_objset_stats);
5422 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5423 zfs_ioc_objset_zplprops);
5424 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5425 zfs_ioc_dataset_list_next);
5426 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5427 zfs_ioc_snapshot_list_next);
5428 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5429 zfs_ioc_send_progress);
5430
5431 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5432 zfs_ioc_diff, zfs_secpolicy_diff);
5433 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5434 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5435 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5436 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5437 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5438 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5439 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5440 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5441 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5442 zfs_ioc_send, zfs_secpolicy_send);
5443
5444 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5445 zfs_secpolicy_none);
5446 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5447 zfs_secpolicy_destroy);
5448 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5449 zfs_secpolicy_rename);
5450 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5451 zfs_secpolicy_recv);
5452 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5453 zfs_secpolicy_promote);
5454 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5455 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5456 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5457 zfs_secpolicy_set_fsacl);
5458
5459 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5460 zfs_secpolicy_share, POOL_CHECK_NONE);
5461 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5462 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5463 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5464 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5465 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5466 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5467 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5468 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5469 }
5470
5471 int
5472 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5473 zfs_ioc_poolcheck_t check)
5474 {
5475 spa_t *spa;
5476 int error;
5477
5478 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5479
5480 if (check & POOL_CHECK_NONE)
5481 return (0);
5482
5483 error = spa_open(name, &spa, FTAG);
5484 if (error == 0) {
5485 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5486 error = SET_ERROR(EAGAIN);
5487 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5488 error = SET_ERROR(EROFS);
5489 spa_close(spa, FTAG);
5490 }
5491 return (error);
5492 }
5493
5494 /*
5495 * Find a free minor number.
5496 */
5497 minor_t
5498 zfsdev_minor_alloc(void)
5499 {
5500 static minor_t last_minor;
5501 minor_t m;
5502
5503 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5504
5505 for (m = last_minor + 1; m != last_minor; m++) {
5506 if (m > ZFSDEV_MAX_MINOR)
5507 m = 1;
5508 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5509 last_minor = m;
5510 return (m);
5511 }
5512 }
5513
5514 return (0);
5515 }
5516
5517 static int
5518 zfs_ctldev_init(dev_t *devp)
5519 {
5520 minor_t minor;
5521 zfs_soft_state_t *zs;
5522
5523 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5524 ASSERT(getminor(*devp) == 0);
5525
5526 minor = zfsdev_minor_alloc();
5527 if (minor == 0)
5528 return (SET_ERROR(ENXIO));
5529
5530 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5531 return (SET_ERROR(EAGAIN));
5532
5533 *devp = makedevice(getemajor(*devp), minor);
5534
5535 zs = ddi_get_soft_state(zfsdev_state, minor);
5536 zs->zss_type = ZSST_CTLDEV;
5537 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5538
5539 return (0);
5540 }
5541
5542 static void
5543 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5544 {
5545 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5546
5547 zfs_onexit_destroy(zo);
5548 ddi_soft_state_free(zfsdev_state, minor);
5549 }
5550
5551 void *
5552 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5553 {
5554 zfs_soft_state_t *zp;
5555
5556 zp = ddi_get_soft_state(zfsdev_state, minor);
5557 if (zp == NULL || zp->zss_type != which)
5558 return (NULL);
5559
5560 return (zp->zss_data);
5561 }
5562
5563 static int
5564 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5565 {
5566 int error = 0;
5567
5568 if (getminor(*devp) != 0)
5569 return (zvol_open(devp, flag, otyp, cr));
5570
5571 /* This is the control device. Allocate a new minor if requested. */
5572 if (flag & FEXCL) {
5573 mutex_enter(&zfsdev_state_lock);
5574 error = zfs_ctldev_init(devp);
5575 mutex_exit(&zfsdev_state_lock);
5576 }
5577
5578 return (error);
5579 }
5580
5581 static int
5582 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5583 {
5584 zfs_onexit_t *zo;
5585 minor_t minor = getminor(dev);
5586
5587 if (minor == 0)
5588 return (0);
5589
5590 mutex_enter(&zfsdev_state_lock);
5591 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5592 if (zo == NULL) {
5593 mutex_exit(&zfsdev_state_lock);
5594 return (zvol_close(dev, flag, otyp, cr));
5595 }
5596 zfs_ctldev_destroy(zo, minor);
5597 mutex_exit(&zfsdev_state_lock);
5598
5599 return (0);
5600 }
5601
5602 static int
5603 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5604 {
5605 zfs_cmd_t *zc;
5606 uint_t vecnum;
5607 int error, rc, len;
5608 minor_t minor = getminor(dev);
5609 const zfs_ioc_vec_t *vec;
5610 char *saved_poolname = NULL;
5611 nvlist_t *innvl = NULL;
5612
5613 if (minor != 0 &&
5614 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5615 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5616
5617 vecnum = cmd - ZFS_IOC_FIRST;
5618 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5619
5620 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5621 return (SET_ERROR(EINVAL));
5622 vec = &zfs_ioc_vec[vecnum];
5623
5624 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5625
5626 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5627 if (error != 0) {
5628 error = SET_ERROR(EFAULT);
5629 goto out;
5630 }
5631
5632 zc->zc_iflags = flag & FKIOCTL;
5633 if (zc->zc_nvlist_src_size != 0) {
5634 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5635 zc->zc_iflags, &innvl);
5636 if (error != 0)
5637 goto out;
5638 }
5639
5640 /*
5641 * Ensure that all pool/dataset names are valid before we pass down to
5642 * the lower layers.
5643 */
5644 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5645 switch (vec->zvec_namecheck) {
5646 case POOL_NAME:
5647 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5648 error = SET_ERROR(EINVAL);
5649 else
5650 error = pool_status_check(zc->zc_name,
5651 vec->zvec_namecheck, vec->zvec_pool_check);
5652 break;
5653
5654 case DATASET_NAME:
5655 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5656 error = SET_ERROR(EINVAL);
5657 else
5658 error = pool_status_check(zc->zc_name,
5659 vec->zvec_namecheck, vec->zvec_pool_check);
5660 break;
5661
5662 case NO_NAME:
5663 break;
5664 }
5665
5666
5667 if (error == 0 && !(flag & FKIOCTL))
5668 error = vec->zvec_secpolicy(zc, innvl, cr);
5669
5670 if (error != 0)
5671 goto out;
5672
5673 /* legacy ioctls can modify zc_name */
5674 len = strcspn(zc->zc_name, "/@") + 1;
5675 saved_poolname = kmem_alloc(len, KM_SLEEP);
5676 (void) strlcpy(saved_poolname, zc->zc_name, len);
5677
5678 if (vec->zvec_func != NULL) {
5679 nvlist_t *outnvl;
5680 int puterror = 0;
5681 spa_t *spa;
5682 nvlist_t *lognv = NULL;
5683
5684 ASSERT(vec->zvec_legacy_func == NULL);
5685
5686 /*
5687 * Add the innvl to the lognv before calling the func,
5688 * in case the func changes the innvl.
5689 */
5690 if (vec->zvec_allow_log) {
5691 lognv = fnvlist_alloc();
5692 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
5693 vec->zvec_name);
5694 if (!nvlist_empty(innvl)) {
5695 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
5696 innvl);
5697 }
5698 }
5699
5700 outnvl = fnvlist_alloc();
5701 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
5702
5703 if (error == 0 && vec->zvec_allow_log &&
5704 spa_open(zc->zc_name, &spa, FTAG) == 0) {
5705 if (!nvlist_empty(outnvl)) {
5706 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
5707 outnvl);
5708 }
5709 (void) spa_history_log_nvl(spa, lognv);
5710 spa_close(spa, FTAG);
5711 }
5712 fnvlist_free(lognv);
5713
5714 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
5715 int smusherror = 0;
5716 if (vec->zvec_smush_outnvlist) {
5717 smusherror = nvlist_smush(outnvl,
5718 zc->zc_nvlist_dst_size);
5719 }
5720 if (smusherror == 0)
5721 puterror = put_nvlist(zc, outnvl);
5722 }
5723
5724 if (puterror != 0)
5725 error = puterror;
5726
5727 nvlist_free(outnvl);
5728 } else {
5729 error = vec->zvec_legacy_func(zc);
5730 }
5731
5732 out:
5733 nvlist_free(innvl);
5734 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5735 if (error == 0 && rc != 0)
5736 error = SET_ERROR(EFAULT);
5737 if (error == 0 && vec->zvec_allow_log) {
5738 char *s = tsd_get(zfs_allow_log_key);
5739 if (s != NULL)
5740 strfree(s);
5741 (void) tsd_set(zfs_allow_log_key, saved_poolname);
5742 } else {
5743 if (saved_poolname != NULL)
5744 strfree(saved_poolname);
5745 }
5746
5747 kmem_free(zc, sizeof (zfs_cmd_t));
5748 return (error);
5749 }
5750
5751 static int
5752 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5753 {
5754 if (cmd != DDI_ATTACH)
5755 return (DDI_FAILURE);
5756
5757 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5758 DDI_PSEUDO, 0) == DDI_FAILURE)
5759 return (DDI_FAILURE);
5760
5761 zfs_dip = dip;
5762
5763 ddi_report_dev(dip);
5764
5765 return (DDI_SUCCESS);
5766 }
5767
5768 static int
5769 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5770 {
5771 if (spa_busy() || zfs_busy() || zvol_busy())
5772 return (DDI_FAILURE);
5773
5774 if (cmd != DDI_DETACH)
5775 return (DDI_FAILURE);
5776
5777 zfs_dip = NULL;
5778
5779 ddi_prop_remove_all(dip);
5780 ddi_remove_minor_node(dip, NULL);
5781
5782 return (DDI_SUCCESS);
5783 }
5784
5785 /*ARGSUSED*/
5786 static int
5787 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5788 {
5789 switch (infocmd) {
5790 case DDI_INFO_DEVT2DEVINFO:
5791 *result = zfs_dip;
5792 return (DDI_SUCCESS);
5793
5794 case DDI_INFO_DEVT2INSTANCE:
5795 *result = (void *)0;
5796 return (DDI_SUCCESS);
5797 }
5798
5799 return (DDI_FAILURE);
5800 }
5801
5802 /*
5803 * OK, so this is a little weird.
5804 *
5805 * /dev/zfs is the control node, i.e. minor 0.
5806 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5807 *
5808 * /dev/zfs has basically nothing to do except serve up ioctls,
5809 * so most of the standard driver entry points are in zvol.c.
5810 */
5811 static struct cb_ops zfs_cb_ops = {
5812 zfsdev_open, /* open */
5813 zfsdev_close, /* close */
5814 zvol_strategy, /* strategy */
5815 nodev, /* print */
5816 zvol_dump, /* dump */
5817 zvol_read, /* read */
5818 zvol_write, /* write */
5819 zfsdev_ioctl, /* ioctl */
5820 nodev, /* devmap */
5821 nodev, /* mmap */
5822 nodev, /* segmap */
5823 nochpoll, /* poll */
5824 ddi_prop_op, /* prop_op */
5825 NULL, /* streamtab */
5826 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
5827 CB_REV, /* version */
5828 nodev, /* async read */
5829 nodev, /* async write */
5830 };
5831
5832 static struct dev_ops zfs_dev_ops = {
5833 DEVO_REV, /* version */
5834 0, /* refcnt */
5835 zfs_info, /* info */
5836 nulldev, /* identify */
5837 nulldev, /* probe */
5838 zfs_attach, /* attach */
5839 zfs_detach, /* detach */
5840 nodev, /* reset */
5841 &zfs_cb_ops, /* driver operations */
5842 NULL, /* no bus operations */
5843 NULL, /* power */
5844 ddi_quiesce_not_needed, /* quiesce */
5845 };
5846
5847 static struct modldrv zfs_modldrv = {
5848 &mod_driverops,
5849 "ZFS storage pool",
5850 &zfs_dev_ops
5851 };
5852
5853 static struct modlinkage modlinkage = {
5854 MODREV_1,
5855 (void *)&zfs_modlfs,
5856 (void *)&zfs_modldrv,
5857 NULL
5858 };
5859
5860 static void
5861 zfs_allow_log_destroy(void *arg)
5862 {
5863 char *poolname = arg;
5864 strfree(poolname);
5865 }
5866
5867 int
5868 _init(void)
5869 {
5870 int error;
5871
5872 spa_init(FREAD | FWRITE);
5873 zfs_init();
5874 zvol_init();
5875 zfs_ioctl_init();
5876
5877 if ((error = mod_install(&modlinkage)) != 0) {
5878 zvol_fini();
5879 zfs_fini();
5880 spa_fini();
5881 return (error);
5882 }
5883
5884 tsd_create(&zfs_fsyncer_key, NULL);
5885 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
5886 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
5887
5888 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
5889 ASSERT(error == 0);
5890 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
5891
5892 return (0);
5893 }
5894
5895 int
5896 _fini(void)
5897 {
5898 int error;
5899
5900 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
5901 return (SET_ERROR(EBUSY));
5902
5903 if ((error = mod_remove(&modlinkage)) != 0)
5904 return (error);
5905
5906 zvol_fini();
5907 zfs_fini();
5908 spa_fini();
5909 if (zfs_nfsshare_inited)
5910 (void) ddi_modclose(nfs_mod);
5911 if (zfs_smbshare_inited)
5912 (void) ddi_modclose(smbsrv_mod);
5913 if (zfs_nfsshare_inited || zfs_smbshare_inited)
5914 (void) ddi_modclose(sharefs_mod);
5915
5916 tsd_destroy(&zfs_fsyncer_key);
5917 ldi_ident_release(zfs_li);
5918 zfs_li = NULL;
5919 mutex_destroy(&zfs_share_lock);
5920
5921 return (error);
5922 }
5923
5924 int
5925 _info(struct modinfo *modinfop)
5926 {
5927 return (mod_info(&modlinkage, modinfop));
5928 }