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