1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Portions Copyright 2011 Martin Matuska
25 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
27 * Copyright (c) 2013 by Delphix. All rights reserved.
28 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
29 * Copyright (c) 2013 Steven Hartland. All rights reserved.
30 */
31
32 /*
33 * ZFS ioctls.
34 *
35 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
36 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
37 *
38 * There are two ways that we handle ioctls: the legacy way where almost
39 * all of the logic is in the ioctl callback, and the new way where most
40 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
41 *
42 * Non-legacy ioctls should be registered by calling
43 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
44 * from userland by lzc_ioctl().
45 *
46 * The registration arguments are as follows:
47 *
48 * const char *name
49 * The name of the ioctl. This is used for history logging. If the
50 * ioctl returns successfully (the callback returns 0), and allow_log
51 * is true, then a history log entry will be recorded with the input &
52 * output nvlists. The log entry can be printed with "zpool history -i".
53 *
54 * zfs_ioc_t ioc
55 * The ioctl request number, which userland will pass to ioctl(2).
56 * The ioctl numbers can change from release to release, because
57 * the caller (libzfs) must be matched to the kernel.
58 *
59 * zfs_secpolicy_func_t *secpolicy
60 * This function will be called before the zfs_ioc_func_t, to
61 * determine if this operation is permitted. It should return EPERM
62 * on failure, and 0 on success. Checks include determining if the
63 * dataset is visible in this zone, and if the user has either all
64 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
65 * to do this operation on this dataset with "zfs allow".
66 *
67 * zfs_ioc_namecheck_t namecheck
68 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
69 * name, a dataset name, or nothing. If the name is not well-formed,
70 * the ioctl will fail and the callback will not be called.
71 * Therefore, the callback can assume that the name is well-formed
72 * (e.g. is null-terminated, doesn't have more than one '@' character,
73 * doesn't have invalid characters).
74 *
75 * zfs_ioc_poolcheck_t pool_check
76 * This specifies requirements on the pool state. If the pool does
77 * not meet them (is suspended or is readonly), the ioctl will fail
78 * and the callback will not be called. If any checks are specified
79 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
80 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
81 * POOL_CHECK_READONLY).
82 *
83 * boolean_t smush_outnvlist
84 * If smush_outnvlist is true, then the output is presumed to be a
85 * list of errors, and it will be "smushed" down to fit into the
86 * caller's buffer, by removing some entries and replacing them with a
87 * single "N_MORE_ERRORS" entry indicating how many were removed. See
88 * nvlist_smush() for details. If smush_outnvlist is false, and the
89 * outnvlist does not fit into the userland-provided buffer, then the
90 * ioctl will fail with ENOMEM.
91 *
92 * zfs_ioc_func_t *func
93 * The callback function that will perform the operation.
94 *
95 * The callback should return 0 on success, or an error number on
96 * failure. If the function fails, the userland ioctl will return -1,
97 * and errno will be set to the callback's return value. The callback
98 * will be called with the following arguments:
99 *
100 * const char *name
101 * The name of the pool or dataset to operate on, from
102 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
103 * expected type (pool, dataset, or none).
104 *
105 * nvlist_t *innvl
106 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
107 * NULL if no input nvlist was provided. Changes to this nvlist are
108 * ignored. If the input nvlist could not be deserialized, the
109 * ioctl will fail and the callback will not be called.
110 *
111 * nvlist_t *outnvl
112 * The output nvlist, initially empty. The callback can fill it in,
113 * and it will be returned to userland by serializing it into
114 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
115 * fails (e.g. because the caller didn't supply a large enough
116 * buffer), then the overall ioctl will fail. See the
117 * 'smush_nvlist' argument above for additional behaviors.
118 *
119 * There are two typical uses of the output nvlist:
120 * - To return state, e.g. property values. In this case,
121 * smush_outnvlist should be false. If the buffer was not large
122 * enough, the caller will reallocate a larger buffer and try
123 * the ioctl again.
124 *
125 * - To return multiple errors from an ioctl which makes on-disk
126 * changes. In this case, smush_outnvlist should be true.
127 * Ioctls which make on-disk modifications should generally not
128 * use the outnvl if they succeed, because the caller can not
129 * distinguish between the operation failing, and
130 * deserialization failing.
131 */
132
133 #include <sys/types.h>
134 #include <sys/param.h>
135 #include <sys/errno.h>
136 #include <sys/uio.h>
137 #include <sys/buf.h>
138 #include <sys/modctl.h>
139 #include <sys/open.h>
140 #include <sys/file.h>
141 #include <sys/kmem.h>
142 #include <sys/conf.h>
143 #include <sys/cmn_err.h>
144 #include <sys/stat.h>
145 #include <sys/zfs_ioctl.h>
146 #include <sys/zfs_vfsops.h>
147 #include <sys/zfs_znode.h>
148 #include <sys/zap.h>
149 #include <sys/spa.h>
150 #include <sys/spa_impl.h>
151 #include <sys/vdev.h>
152 #include <sys/priv_impl.h>
153 #include <sys/dmu.h>
154 #include <sys/dsl_dir.h>
155 #include <sys/dsl_dataset.h>
156 #include <sys/dsl_prop.h>
157 #include <sys/dsl_deleg.h>
158 #include <sys/dmu_objset.h>
159 #include <sys/dmu_impl.h>
160 #include <sys/dmu_tx.h>
161 #include <sys/ddi.h>
162 #include <sys/sunddi.h>
163 #include <sys/sunldi.h>
164 #include <sys/policy.h>
165 #include <sys/zone.h>
166 #include <sys/nvpair.h>
167 #include <sys/pathname.h>
168 #include <sys/mount.h>
169 #include <sys/sdt.h>
170 #include <sys/fs/zfs.h>
171 #include <sys/zfs_ctldir.h>
172 #include <sys/zfs_dir.h>
173 #include <sys/zfs_onexit.h>
174 #include <sys/zvol.h>
175 #include <sys/dsl_scan.h>
176 #include <sharefs/share.h>
177 #include <sys/dmu_objset.h>
178 #include <sys/dmu_send.h>
179 #include <sys/dsl_destroy.h>
180 #include <sys/dsl_userhold.h>
181 #include <sys/zfeature.h>
182
183 #include "zfs_namecheck.h"
184 #include "zfs_prop.h"
185 #include "zfs_deleg.h"
186 #include "zfs_comutil.h"
187
188 extern struct modlfs zfs_modlfs;
189
190 extern void zfs_init(void);
191 extern void zfs_fini(void);
192
193 ldi_ident_t zfs_li = NULL;
194 dev_info_t *zfs_dip;
195
196 uint_t zfs_fsyncer_key;
197 extern uint_t rrw_tsd_key;
198 static uint_t zfs_allow_log_key;
199
200 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
201 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
202 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
203
204 typedef enum {
205 NO_NAME,
206 POOL_NAME,
207 DATASET_NAME
208 } zfs_ioc_namecheck_t;
209
210 typedef enum {
211 POOL_CHECK_NONE = 1 << 0,
212 POOL_CHECK_SUSPENDED = 1 << 1,
213 POOL_CHECK_READONLY = 1 << 2,
214 } zfs_ioc_poolcheck_t;
215
216 typedef struct zfs_ioc_vec {
217 zfs_ioc_legacy_func_t *zvec_legacy_func;
218 zfs_ioc_func_t *zvec_func;
219 zfs_secpolicy_func_t *zvec_secpolicy;
220 zfs_ioc_namecheck_t zvec_namecheck;
221 boolean_t zvec_allow_log;
222 zfs_ioc_poolcheck_t zvec_pool_check;
223 boolean_t zvec_smush_outnvlist;
224 const char *zvec_name;
225 } zfs_ioc_vec_t;
226
227 /* This array is indexed by zfs_userquota_prop_t */
228 static const char *userquota_perms[] = {
229 ZFS_DELEG_PERM_USERUSED,
230 ZFS_DELEG_PERM_USERQUOTA,
231 ZFS_DELEG_PERM_GROUPUSED,
232 ZFS_DELEG_PERM_GROUPQUOTA,
233 };
234
235 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
236 static int zfs_check_settable(const char *name, nvpair_t *property,
237 cred_t *cr);
238 static int zfs_check_clearable(char *dataset, nvlist_t *props,
239 nvlist_t **errors);
240 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
241 boolean_t *);
242 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
243 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
244
245 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature);
246
247 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
248 void
249 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
250 {
251 const char *newfile;
252 char buf[512];
253 va_list adx;
254
255 /*
256 * Get rid of annoying "../common/" prefix to filename.
257 */
258 newfile = strrchr(file, '/');
259 if (newfile != NULL) {
260 newfile = newfile + 1; /* Get rid of leading / */
261 } else {
262 newfile = file;
263 }
264
265 va_start(adx, fmt);
266 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
267 va_end(adx);
268
269 /*
270 * To get this data, use the zfs-dprintf probe as so:
271 * dtrace -q -n 'zfs-dprintf \
272 * /stringof(arg0) == "dbuf.c"/ \
273 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
274 * arg0 = file name
275 * arg1 = function name
276 * arg2 = line number
277 * arg3 = message
278 */
279 DTRACE_PROBE4(zfs__dprintf,
280 char *, newfile, char *, func, int, line, char *, buf);
281 }
282
283 static void
284 history_str_free(char *buf)
285 {
286 kmem_free(buf, HIS_MAX_RECORD_LEN);
287 }
288
289 static char *
290 history_str_get(zfs_cmd_t *zc)
291 {
292 char *buf;
293
294 if (zc->zc_history == NULL)
295 return (NULL);
296
297 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
298 if (copyinstr((void *)(uintptr_t)zc->zc_history,
299 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
300 history_str_free(buf);
301 return (NULL);
302 }
303
304 buf[HIS_MAX_RECORD_LEN -1] = '\0';
305
306 return (buf);
307 }
308
309 /*
310 * Check to see if the named dataset is currently defined as bootable
311 */
312 static boolean_t
313 zfs_is_bootfs(const char *name)
314 {
315 objset_t *os;
316
317 if (dmu_objset_hold(name, FTAG, &os) == 0) {
318 boolean_t ret;
319 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
320 dmu_objset_rele(os, FTAG);
321 return (ret);
322 }
323 return (B_FALSE);
324 }
325
326 /*
327 * Return non-zero if the spa version is less than requested version.
328 */
329 static int
330 zfs_earlier_version(const char *name, int version)
331 {
332 spa_t *spa;
333
334 if (spa_open(name, &spa, FTAG) == 0) {
335 if (spa_version(spa) < version) {
336 spa_close(spa, FTAG);
337 return (1);
338 }
339 spa_close(spa, FTAG);
340 }
341 return (0);
342 }
343
344 /*
345 * Return TRUE if the ZPL version is less than requested version.
346 */
347 static boolean_t
348 zpl_earlier_version(const char *name, int version)
349 {
350 objset_t *os;
351 boolean_t rc = B_TRUE;
352
353 if (dmu_objset_hold(name, FTAG, &os) == 0) {
354 uint64_t zplversion;
355
356 if (dmu_objset_type(os) != DMU_OST_ZFS) {
357 dmu_objset_rele(os, FTAG);
358 return (B_TRUE);
359 }
360 /* XXX reading from non-owned objset */
361 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
362 rc = zplversion < version;
363 dmu_objset_rele(os, FTAG);
364 }
365 return (rc);
366 }
367
368 static void
369 zfs_log_history(zfs_cmd_t *zc)
370 {
371 spa_t *spa;
372 char *buf;
373
374 if ((buf = history_str_get(zc)) == NULL)
375 return;
376
377 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
378 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
379 (void) spa_history_log(spa, buf);
380 spa_close(spa, FTAG);
381 }
382 history_str_free(buf);
383 }
384
385 /*
386 * Policy for top-level read operations (list pools). Requires no privileges,
387 * and can be used in the local zone, as there is no associated dataset.
388 */
389 /* ARGSUSED */
390 static int
391 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
392 {
393 return (0);
394 }
395
396 /*
397 * Policy for dataset read operations (list children, get statistics). Requires
398 * no privileges, but must be visible in the local zone.
399 */
400 /* ARGSUSED */
401 static int
402 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
403 {
404 if (INGLOBALZONE(curproc) ||
405 zone_dataset_visible(zc->zc_name, NULL))
406 return (0);
407
408 return (SET_ERROR(ENOENT));
409 }
410
411 static int
412 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
413 {
414 int writable = 1;
415
416 /*
417 * The dataset must be visible by this zone -- check this first
418 * so they don't see EPERM on something they shouldn't know about.
419 */
420 if (!INGLOBALZONE(curproc) &&
421 !zone_dataset_visible(dataset, &writable))
422 return (SET_ERROR(ENOENT));
423
424 if (INGLOBALZONE(curproc)) {
425 /*
426 * If the fs is zoned, only root can access it from the
427 * global zone.
428 */
429 if (secpolicy_zfs(cr) && zoned)
430 return (SET_ERROR(EPERM));
431 } else {
432 /*
433 * If we are in a local zone, the 'zoned' property must be set.
434 */
435 if (!zoned)
436 return (SET_ERROR(EPERM));
437
438 /* must be writable by this zone */
439 if (!writable)
440 return (SET_ERROR(EPERM));
441 }
442 return (0);
443 }
444
445 static int
446 zfs_dozonecheck(const char *dataset, cred_t *cr)
447 {
448 uint64_t zoned;
449
450 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
451 return (SET_ERROR(ENOENT));
452
453 return (zfs_dozonecheck_impl(dataset, zoned, cr));
454 }
455
456 static int
457 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
458 {
459 uint64_t zoned;
460
461 if (dsl_prop_get_int_ds(ds, "zoned", &zoned))
462 return (SET_ERROR(ENOENT));
463
464 return (zfs_dozonecheck_impl(dataset, zoned, cr));
465 }
466
467 static int
468 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
469 const char *perm, cred_t *cr)
470 {
471 int error;
472
473 error = zfs_dozonecheck_ds(name, ds, cr);
474 if (error == 0) {
475 error = secpolicy_zfs(cr);
476 if (error != 0)
477 error = dsl_deleg_access_impl(ds, perm, cr);
478 }
479 return (error);
480 }
481
482 static int
483 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
484 {
485 int error;
486 dsl_dataset_t *ds;
487 dsl_pool_t *dp;
488
489 error = dsl_pool_hold(name, FTAG, &dp);
490 if (error != 0)
491 return (error);
492
493 error = dsl_dataset_hold(dp, name, FTAG, &ds);
494 if (error != 0) {
495 dsl_pool_rele(dp, FTAG);
496 return (error);
497 }
498
499 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr);
500
501 dsl_dataset_rele(ds, FTAG);
502 dsl_pool_rele(dp, FTAG);
503 return (error);
504 }
505
506 /*
507 * Policy for setting the security label property.
508 *
509 * Returns 0 for success, non-zero for access and other errors.
510 */
511 static int
512 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
513 {
514 char ds_hexsl[MAXNAMELEN];
515 bslabel_t ds_sl, new_sl;
516 boolean_t new_default = FALSE;
517 uint64_t zoned;
518 int needed_priv = -1;
519 int error;
520
521 /* First get the existing dataset label. */
522 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
523 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
524 if (error != 0)
525 return (SET_ERROR(EPERM));
526
527 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
528 new_default = TRUE;
529
530 /* The label must be translatable */
531 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
532 return (SET_ERROR(EINVAL));
533
534 /*
535 * In a non-global zone, disallow attempts to set a label that
536 * doesn't match that of the zone; otherwise no other checks
537 * are needed.
538 */
539 if (!INGLOBALZONE(curproc)) {
540 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
541 return (SET_ERROR(EPERM));
542 return (0);
543 }
544
545 /*
546 * For global-zone datasets (i.e., those whose zoned property is
547 * "off", verify that the specified new label is valid for the
548 * global zone.
549 */
550 if (dsl_prop_get_integer(name,
551 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
552 return (SET_ERROR(EPERM));
553 if (!zoned) {
554 if (zfs_check_global_label(name, strval) != 0)
555 return (SET_ERROR(EPERM));
556 }
557
558 /*
559 * If the existing dataset label is nondefault, check if the
560 * dataset is mounted (label cannot be changed while mounted).
561 * Get the zfsvfs; if there isn't one, then the dataset isn't
562 * mounted (or isn't a dataset, doesn't exist, ...).
563 */
564 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
565 objset_t *os;
566 static char *setsl_tag = "setsl_tag";
567
568 /*
569 * Try to own the dataset; abort if there is any error,
570 * (e.g., already mounted, in use, or other error).
571 */
572 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
573 setsl_tag, &os);
574 if (error != 0)
575 return (SET_ERROR(EPERM));
576
577 dmu_objset_disown(os, setsl_tag);
578
579 if (new_default) {
580 needed_priv = PRIV_FILE_DOWNGRADE_SL;
581 goto out_check;
582 }
583
584 if (hexstr_to_label(strval, &new_sl) != 0)
585 return (SET_ERROR(EPERM));
586
587 if (blstrictdom(&ds_sl, &new_sl))
588 needed_priv = PRIV_FILE_DOWNGRADE_SL;
589 else if (blstrictdom(&new_sl, &ds_sl))
590 needed_priv = PRIV_FILE_UPGRADE_SL;
591 } else {
592 /* dataset currently has a default label */
593 if (!new_default)
594 needed_priv = PRIV_FILE_UPGRADE_SL;
595 }
596
597 out_check:
598 if (needed_priv != -1)
599 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
600 return (0);
601 }
602
603 static int
604 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
605 cred_t *cr)
606 {
607 char *strval;
608
609 /*
610 * Check permissions for special properties.
611 */
612 switch (prop) {
613 case ZFS_PROP_ZONED:
614 /*
615 * Disallow setting of 'zoned' from within a local zone.
616 */
617 if (!INGLOBALZONE(curproc))
618 return (SET_ERROR(EPERM));
619 break;
620
621 case ZFS_PROP_QUOTA:
622 if (!INGLOBALZONE(curproc)) {
623 uint64_t zoned;
624 char setpoint[MAXNAMELEN];
625 /*
626 * Unprivileged users are allowed to modify the
627 * quota on things *under* (ie. contained by)
628 * the thing they own.
629 */
630 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
631 setpoint))
632 return (SET_ERROR(EPERM));
633 if (!zoned || strlen(dsname) <= strlen(setpoint))
634 return (SET_ERROR(EPERM));
635 }
636 break;
637
638 case ZFS_PROP_MLSLABEL:
639 if (!is_system_labeled())
640 return (SET_ERROR(EPERM));
641
642 if (nvpair_value_string(propval, &strval) == 0) {
643 int err;
644
645 err = zfs_set_slabel_policy(dsname, strval, CRED());
646 if (err != 0)
647 return (err);
648 }
649 break;
650 }
651
652 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
653 }
654
655 /* ARGSUSED */
656 static int
657 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
658 {
659 int error;
660
661 error = zfs_dozonecheck(zc->zc_name, cr);
662 if (error != 0)
663 return (error);
664
665 /*
666 * permission to set permissions will be evaluated later in
667 * dsl_deleg_can_allow()
668 */
669 return (0);
670 }
671
672 /* ARGSUSED */
673 static int
674 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
675 {
676 return (zfs_secpolicy_write_perms(zc->zc_name,
677 ZFS_DELEG_PERM_ROLLBACK, cr));
678 }
679
680 /* ARGSUSED */
681 static int
682 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
683 {
684 dsl_pool_t *dp;
685 dsl_dataset_t *ds;
686 char *cp;
687 int error;
688
689 /*
690 * Generate the current snapshot name from the given objsetid, then
691 * use that name for the secpolicy/zone checks.
692 */
693 cp = strchr(zc->zc_name, '@');
694 if (cp == NULL)
695 return (SET_ERROR(EINVAL));
696 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
697 if (error != 0)
698 return (error);
699
700 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
701 if (error != 0) {
702 dsl_pool_rele(dp, FTAG);
703 return (error);
704 }
705
706 dsl_dataset_name(ds, zc->zc_name);
707
708 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
709 ZFS_DELEG_PERM_SEND, cr);
710 dsl_dataset_rele(ds, FTAG);
711 dsl_pool_rele(dp, FTAG);
712
713 return (error);
714 }
715
716 /* ARGSUSED */
717 static int
718 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
719 {
720 return (zfs_secpolicy_write_perms(zc->zc_name,
721 ZFS_DELEG_PERM_SEND, cr));
722 }
723
724 /* ARGSUSED */
725 static int
726 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
727 {
728 vnode_t *vp;
729 int error;
730
731 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
732 NO_FOLLOW, NULL, &vp)) != 0)
733 return (error);
734
735 /* Now make sure mntpnt and dataset are ZFS */
736
737 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
738 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
739 zc->zc_name) != 0)) {
740 VN_RELE(vp);
741 return (SET_ERROR(EPERM));
742 }
743
744 VN_RELE(vp);
745 return (dsl_deleg_access(zc->zc_name,
746 ZFS_DELEG_PERM_SHARE, cr));
747 }
748
749 int
750 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
751 {
752 if (!INGLOBALZONE(curproc))
753 return (SET_ERROR(EPERM));
754
755 if (secpolicy_nfs(cr) == 0) {
756 return (0);
757 } else {
758 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
759 }
760 }
761
762 int
763 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
764 {
765 if (!INGLOBALZONE(curproc))
766 return (SET_ERROR(EPERM));
767
768 if (secpolicy_smb(cr) == 0) {
769 return (0);
770 } else {
771 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
772 }
773 }
774
775 static int
776 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
777 {
778 char *cp;
779
780 /*
781 * Remove the @bla or /bla from the end of the name to get the parent.
782 */
783 (void) strncpy(parent, datasetname, parentsize);
784 cp = strrchr(parent, '@');
785 if (cp != NULL) {
786 cp[0] = '\0';
787 } else {
788 cp = strrchr(parent, '/');
789 if (cp == NULL)
790 return (SET_ERROR(ENOENT));
791 cp[0] = '\0';
792 }
793
794 return (0);
795 }
796
797 int
798 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
799 {
800 int error;
801
802 if ((error = zfs_secpolicy_write_perms(name,
803 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
804 return (error);
805
806 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
807 }
808
809 /* ARGSUSED */
810 static int
811 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
812 {
813 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
814 }
815
816 /*
817 * Destroying snapshots with delegated permissions requires
818 * descendant mount and destroy permissions.
819 */
820 /* ARGSUSED */
821 static int
822 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
823 {
824 nvlist_t *snaps;
825 nvpair_t *pair, *nextpair;
826 int error = 0;
827
828 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
829 return (SET_ERROR(EINVAL));
830 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
831 pair = nextpair) {
832 dsl_pool_t *dp;
833 dsl_dataset_t *ds;
834
835 error = dsl_pool_hold(nvpair_name(pair), FTAG, &dp);
836 if (error != 0)
837 break;
838 nextpair = nvlist_next_nvpair(snaps, pair);
839 error = dsl_dataset_hold(dp, nvpair_name(pair), FTAG, &ds);
840 if (error == 0)
841 dsl_dataset_rele(ds, FTAG);
842 dsl_pool_rele(dp, FTAG);
843
844 if (error == 0) {
845 error = zfs_secpolicy_destroy_perms(nvpair_name(pair),
846 cr);
847 } else if (error == ENOENT) {
848 /*
849 * Ignore any snapshots that don't exist (we consider
850 * them "already destroyed"). Remove the name from the
851 * nvl here in case the snapshot is created between
852 * now and when we try to destroy it (in which case
853 * we don't want to destroy it since we haven't
854 * checked for permission).
855 */
856 fnvlist_remove_nvpair(snaps, pair);
857 error = 0;
858 }
859 if (error != 0)
860 break;
861 }
862
863 return (error);
864 }
865
866 int
867 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
868 {
869 char parentname[MAXNAMELEN];
870 int error;
871
872 if ((error = zfs_secpolicy_write_perms(from,
873 ZFS_DELEG_PERM_RENAME, cr)) != 0)
874 return (error);
875
876 if ((error = zfs_secpolicy_write_perms(from,
877 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
878 return (error);
879
880 if ((error = zfs_get_parent(to, parentname,
881 sizeof (parentname))) != 0)
882 return (error);
883
884 if ((error = zfs_secpolicy_write_perms(parentname,
885 ZFS_DELEG_PERM_CREATE, cr)) != 0)
886 return (error);
887
888 if ((error = zfs_secpolicy_write_perms(parentname,
889 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
890 return (error);
891
892 return (error);
893 }
894
895 /* ARGSUSED */
896 static int
897 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
898 {
899 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
900 }
901
902 /* ARGSUSED */
903 static int
904 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
905 {
906 dsl_pool_t *dp;
907 dsl_dataset_t *clone;
908 int error;
909
910 error = zfs_secpolicy_write_perms(zc->zc_name,
911 ZFS_DELEG_PERM_PROMOTE, cr);
912 if (error != 0)
913 return (error);
914
915 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
916 if (error != 0)
917 return (error);
918
919 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
920
921 if (error == 0) {
922 char parentname[MAXNAMELEN];
923 dsl_dataset_t *origin = NULL;
924 dsl_dir_t *dd;
925 dd = clone->ds_dir;
926
927 error = dsl_dataset_hold_obj(dd->dd_pool,
928 dd->dd_phys->dd_origin_obj, FTAG, &origin);
929 if (error != 0) {
930 dsl_dataset_rele(clone, FTAG);
931 dsl_pool_rele(dp, FTAG);
932 return (error);
933 }
934
935 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
936 ZFS_DELEG_PERM_MOUNT, cr);
937
938 dsl_dataset_name(origin, parentname);
939 if (error == 0) {
940 error = zfs_secpolicy_write_perms_ds(parentname, origin,
941 ZFS_DELEG_PERM_PROMOTE, cr);
942 }
943 dsl_dataset_rele(clone, FTAG);
944 dsl_dataset_rele(origin, FTAG);
945 }
946 dsl_pool_rele(dp, FTAG);
947 return (error);
948 }
949
950 /* ARGSUSED */
951 static int
952 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
953 {
954 int error;
955
956 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
957 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
958 return (error);
959
960 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
961 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
962 return (error);
963
964 return (zfs_secpolicy_write_perms(zc->zc_name,
965 ZFS_DELEG_PERM_CREATE, cr));
966 }
967
968 int
969 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
970 {
971 return (zfs_secpolicy_write_perms(name,
972 ZFS_DELEG_PERM_SNAPSHOT, cr));
973 }
974
975 /*
976 * Check for permission to create each snapshot in the nvlist.
977 */
978 /* ARGSUSED */
979 static int
980 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
981 {
982 nvlist_t *snaps;
983 int error = 0;
984 nvpair_t *pair;
985
986 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
987 return (SET_ERROR(EINVAL));
988 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
989 pair = nvlist_next_nvpair(snaps, pair)) {
990 char *name = nvpair_name(pair);
991 char *atp = strchr(name, '@');
992
993 if (atp == NULL) {
994 error = SET_ERROR(EINVAL);
995 break;
996 }
997 *atp = '\0';
998 error = zfs_secpolicy_snapshot_perms(name, cr);
999 *atp = '@';
1000 if (error != 0)
1001 break;
1002 }
1003 return (error);
1004 }
1005
1006 /* ARGSUSED */
1007 static int
1008 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1009 {
1010 /*
1011 * Even root must have a proper TSD so that we know what pool
1012 * to log to.
1013 */
1014 if (tsd_get(zfs_allow_log_key) == NULL)
1015 return (SET_ERROR(EPERM));
1016 return (0);
1017 }
1018
1019 static int
1020 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1021 {
1022 char parentname[MAXNAMELEN];
1023 int error;
1024 char *origin;
1025
1026 if ((error = zfs_get_parent(zc->zc_name, parentname,
1027 sizeof (parentname))) != 0)
1028 return (error);
1029
1030 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1031 (error = zfs_secpolicy_write_perms(origin,
1032 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1033 return (error);
1034
1035 if ((error = zfs_secpolicy_write_perms(parentname,
1036 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1037 return (error);
1038
1039 return (zfs_secpolicy_write_perms(parentname,
1040 ZFS_DELEG_PERM_MOUNT, cr));
1041 }
1042
1043 /*
1044 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1045 * SYS_CONFIG privilege, which is not available in a local zone.
1046 */
1047 /* ARGSUSED */
1048 static int
1049 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1050 {
1051 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1052 return (SET_ERROR(EPERM));
1053
1054 return (0);
1055 }
1056
1057 /*
1058 * Policy for object to name lookups.
1059 */
1060 /* ARGSUSED */
1061 static int
1062 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1063 {
1064 int error;
1065
1066 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1067 return (0);
1068
1069 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1070 return (error);
1071 }
1072
1073 /*
1074 * Policy for fault injection. Requires all privileges.
1075 */
1076 /* ARGSUSED */
1077 static int
1078 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1079 {
1080 return (secpolicy_zinject(cr));
1081 }
1082
1083 /* ARGSUSED */
1084 static int
1085 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1086 {
1087 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1088
1089 if (prop == ZPROP_INVAL) {
1090 if (!zfs_prop_user(zc->zc_value))
1091 return (SET_ERROR(EINVAL));
1092 return (zfs_secpolicy_write_perms(zc->zc_name,
1093 ZFS_DELEG_PERM_USERPROP, cr));
1094 } else {
1095 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1096 NULL, cr));
1097 }
1098 }
1099
1100 static int
1101 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1102 {
1103 int err = zfs_secpolicy_read(zc, innvl, cr);
1104 if (err)
1105 return (err);
1106
1107 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1108 return (SET_ERROR(EINVAL));
1109
1110 if (zc->zc_value[0] == 0) {
1111 /*
1112 * They are asking about a posix uid/gid. If it's
1113 * themself, allow it.
1114 */
1115 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1116 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1117 if (zc->zc_guid == crgetuid(cr))
1118 return (0);
1119 } else {
1120 if (groupmember(zc->zc_guid, cr))
1121 return (0);
1122 }
1123 }
1124
1125 return (zfs_secpolicy_write_perms(zc->zc_name,
1126 userquota_perms[zc->zc_objset_type], cr));
1127 }
1128
1129 static int
1130 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1131 {
1132 int err = zfs_secpolicy_read(zc, innvl, cr);
1133 if (err)
1134 return (err);
1135
1136 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1137 return (SET_ERROR(EINVAL));
1138
1139 return (zfs_secpolicy_write_perms(zc->zc_name,
1140 userquota_perms[zc->zc_objset_type], cr));
1141 }
1142
1143 /* ARGSUSED */
1144 static int
1145 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1146 {
1147 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1148 NULL, cr));
1149 }
1150
1151 /* ARGSUSED */
1152 static int
1153 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1154 {
1155 nvpair_t *pair;
1156 nvlist_t *holds;
1157 int error;
1158
1159 error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1160 if (error != 0)
1161 return (SET_ERROR(EINVAL));
1162
1163 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1164 pair = nvlist_next_nvpair(holds, pair)) {
1165 char fsname[MAXNAMELEN];
1166 error = dmu_fsname(nvpair_name(pair), fsname);
1167 if (error != 0)
1168 return (error);
1169 error = zfs_secpolicy_write_perms(fsname,
1170 ZFS_DELEG_PERM_HOLD, cr);
1171 if (error != 0)
1172 return (error);
1173 }
1174 return (0);
1175 }
1176
1177 /* ARGSUSED */
1178 static int
1179 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1180 {
1181 nvpair_t *pair;
1182 int error;
1183
1184 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1185 pair = nvlist_next_nvpair(innvl, pair)) {
1186 char fsname[MAXNAMELEN];
1187 error = dmu_fsname(nvpair_name(pair), fsname);
1188 if (error != 0)
1189 return (error);
1190 error = zfs_secpolicy_write_perms(fsname,
1191 ZFS_DELEG_PERM_RELEASE, cr);
1192 if (error != 0)
1193 return (error);
1194 }
1195 return (0);
1196 }
1197
1198 /*
1199 * Policy for allowing temporary snapshots to be taken or released
1200 */
1201 static int
1202 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1203 {
1204 /*
1205 * A temporary snapshot is the same as a snapshot,
1206 * hold, destroy and release all rolled into one.
1207 * Delegated diff alone is sufficient that we allow this.
1208 */
1209 int error;
1210
1211 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1212 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1213 return (0);
1214
1215 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1216 if (error == 0)
1217 error = zfs_secpolicy_hold(zc, innvl, cr);
1218 if (error == 0)
1219 error = zfs_secpolicy_release(zc, innvl, cr);
1220 if (error == 0)
1221 error = zfs_secpolicy_destroy(zc, innvl, cr);
1222 return (error);
1223 }
1224
1225 /*
1226 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1227 */
1228 static int
1229 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1230 {
1231 char *packed;
1232 int error;
1233 nvlist_t *list = NULL;
1234
1235 /*
1236 * Read in and unpack the user-supplied nvlist.
1237 */
1238 if (size == 0)
1239 return (SET_ERROR(EINVAL));
1240
1241 packed = kmem_alloc(size, KM_SLEEP);
1242
1243 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1244 iflag)) != 0) {
1245 kmem_free(packed, size);
1246 return (error);
1247 }
1248
1249 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1250 kmem_free(packed, size);
1251 return (error);
1252 }
1253
1254 kmem_free(packed, size);
1255
1256 *nvp = list;
1257 return (0);
1258 }
1259
1260 /*
1261 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1262 * Entries will be removed from the end of the nvlist, and one int32 entry
1263 * named "N_MORE_ERRORS" will be added indicating how many entries were
1264 * removed.
1265 */
1266 static int
1267 nvlist_smush(nvlist_t *errors, size_t max)
1268 {
1269 size_t size;
1270
1271 size = fnvlist_size(errors);
1272
1273 if (size > max) {
1274 nvpair_t *more_errors;
1275 int n = 0;
1276
1277 if (max < 1024)
1278 return (SET_ERROR(ENOMEM));
1279
1280 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1281 more_errors = nvlist_prev_nvpair(errors, NULL);
1282
1283 do {
1284 nvpair_t *pair = nvlist_prev_nvpair(errors,
1285 more_errors);
1286 fnvlist_remove_nvpair(errors, pair);
1287 n++;
1288 size = fnvlist_size(errors);
1289 } while (size > max);
1290
1291 fnvlist_remove_nvpair(errors, more_errors);
1292 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1293 ASSERT3U(fnvlist_size(errors), <=, max);
1294 }
1295
1296 return (0);
1297 }
1298
1299 static int
1300 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1301 {
1302 char *packed = NULL;
1303 int error = 0;
1304 size_t size;
1305
1306 size = fnvlist_size(nvl);
1307
1308 if (size > zc->zc_nvlist_dst_size) {
1309 error = SET_ERROR(ENOMEM);
1310 } else {
1311 packed = fnvlist_pack(nvl, &size);
1312 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1313 size, zc->zc_iflags) != 0)
1314 error = SET_ERROR(EFAULT);
1315 fnvlist_pack_free(packed, size);
1316 }
1317
1318 zc->zc_nvlist_dst_size = size;
1319 zc->zc_nvlist_dst_filled = B_TRUE;
1320 return (error);
1321 }
1322
1323 static int
1324 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1325 {
1326 objset_t *os;
1327 int error;
1328
1329 error = dmu_objset_hold(dsname, FTAG, &os);
1330 if (error != 0)
1331 return (error);
1332 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1333 dmu_objset_rele(os, FTAG);
1334 return (SET_ERROR(EINVAL));
1335 }
1336
1337 mutex_enter(&os->os_user_ptr_lock);
1338 *zfvp = dmu_objset_get_user(os);
1339 if (*zfvp) {
1340 VFS_HOLD((*zfvp)->z_vfs);
1341 } else {
1342 error = SET_ERROR(ESRCH);
1343 }
1344 mutex_exit(&os->os_user_ptr_lock);
1345 dmu_objset_rele(os, FTAG);
1346 return (error);
1347 }
1348
1349 /*
1350 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1351 * case its z_vfs will be NULL, and it will be opened as the owner.
1352 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1353 * which prevents all vnode ops from running.
1354 */
1355 static int
1356 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1357 {
1358 int error = 0;
1359
1360 if (getzfsvfs(name, zfvp) != 0)
1361 error = zfsvfs_create(name, zfvp);
1362 if (error == 0) {
1363 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1364 RW_READER, tag);
1365 if ((*zfvp)->z_unmounted) {
1366 /*
1367 * XXX we could probably try again, since the unmounting
1368 * thread should be just about to disassociate the
1369 * objset from the zfsvfs.
1370 */
1371 rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1372 return (SET_ERROR(EBUSY));
1373 }
1374 }
1375 return (error);
1376 }
1377
1378 static void
1379 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1380 {
1381 rrw_exit(&zfsvfs->z_teardown_lock, tag);
1382
1383 if (zfsvfs->z_vfs) {
1384 VFS_RELE(zfsvfs->z_vfs);
1385 } else {
1386 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1387 zfsvfs_free(zfsvfs);
1388 }
1389 }
1390
1391 static int
1392 zfs_ioc_pool_create(zfs_cmd_t *zc)
1393 {
1394 int error;
1395 nvlist_t *config, *props = NULL;
1396 nvlist_t *rootprops = NULL;
1397 nvlist_t *zplprops = NULL;
1398
1399 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1400 zc->zc_iflags, &config))
1401 return (error);
1402
1403 if (zc->zc_nvlist_src_size != 0 && (error =
1404 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1405 zc->zc_iflags, &props))) {
1406 nvlist_free(config);
1407 return (error);
1408 }
1409
1410 if (props) {
1411 nvlist_t *nvl = NULL;
1412 uint64_t version = SPA_VERSION;
1413
1414 (void) nvlist_lookup_uint64(props,
1415 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1416 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1417 error = SET_ERROR(EINVAL);
1418 goto pool_props_bad;
1419 }
1420 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1421 if (nvl) {
1422 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1423 if (error != 0) {
1424 nvlist_free(config);
1425 nvlist_free(props);
1426 return (error);
1427 }
1428 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1429 }
1430 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1431 error = zfs_fill_zplprops_root(version, rootprops,
1432 zplprops, NULL);
1433 if (error != 0)
1434 goto pool_props_bad;
1435 }
1436
1437 error = spa_create(zc->zc_name, config, props, zplprops);
1438
1439 /*
1440 * Set the remaining root properties
1441 */
1442 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1443 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1444 (void) spa_destroy(zc->zc_name);
1445
1446 pool_props_bad:
1447 nvlist_free(rootprops);
1448 nvlist_free(zplprops);
1449 nvlist_free(config);
1450 nvlist_free(props);
1451
1452 return (error);
1453 }
1454
1455 static int
1456 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1457 {
1458 int error;
1459 zfs_log_history(zc);
1460 error = spa_destroy(zc->zc_name);
1461 if (error == 0)
1462 zvol_remove_minors(zc->zc_name);
1463 return (error);
1464 }
1465
1466 static int
1467 zfs_ioc_pool_import(zfs_cmd_t *zc)
1468 {
1469 nvlist_t *config, *props = NULL;
1470 uint64_t guid;
1471 int error;
1472
1473 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1474 zc->zc_iflags, &config)) != 0)
1475 return (error);
1476
1477 if (zc->zc_nvlist_src_size != 0 && (error =
1478 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1479 zc->zc_iflags, &props))) {
1480 nvlist_free(config);
1481 return (error);
1482 }
1483
1484 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1485 guid != zc->zc_guid)
1486 error = SET_ERROR(EINVAL);
1487 else
1488 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1489
1490 if (zc->zc_nvlist_dst != 0) {
1491 int err;
1492
1493 if ((err = put_nvlist(zc, config)) != 0)
1494 error = err;
1495 }
1496
1497 nvlist_free(config);
1498
1499 if (props)
1500 nvlist_free(props);
1501
1502 return (error);
1503 }
1504
1505 static int
1506 zfs_ioc_pool_export(zfs_cmd_t *zc)
1507 {
1508 int error;
1509 boolean_t force = (boolean_t)zc->zc_cookie;
1510 boolean_t hardforce = (boolean_t)zc->zc_guid;
1511
1512 zfs_log_history(zc);
1513 error = spa_export(zc->zc_name, NULL, force, hardforce);
1514 if (error == 0)
1515 zvol_remove_minors(zc->zc_name);
1516 return (error);
1517 }
1518
1519 static int
1520 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1521 {
1522 nvlist_t *configs;
1523 int error;
1524
1525 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1526 return (SET_ERROR(EEXIST));
1527
1528 error = put_nvlist(zc, configs);
1529
1530 nvlist_free(configs);
1531
1532 return (error);
1533 }
1534
1535 /*
1536 * inputs:
1537 * zc_name name of the pool
1538 *
1539 * outputs:
1540 * zc_cookie real errno
1541 * zc_nvlist_dst config nvlist
1542 * zc_nvlist_dst_size size of config nvlist
1543 */
1544 static int
1545 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1546 {
1547 nvlist_t *config;
1548 int error;
1549 int ret = 0;
1550
1551 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1552 sizeof (zc->zc_value));
1553
1554 if (config != NULL) {
1555 ret = put_nvlist(zc, config);
1556 nvlist_free(config);
1557
1558 /*
1559 * The config may be present even if 'error' is non-zero.
1560 * In this case we return success, and preserve the real errno
1561 * in 'zc_cookie'.
1562 */
1563 zc->zc_cookie = error;
1564 } else {
1565 ret = error;
1566 }
1567
1568 return (ret);
1569 }
1570
1571 /*
1572 * Try to import the given pool, returning pool stats as appropriate so that
1573 * user land knows which devices are available and overall pool health.
1574 */
1575 static int
1576 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1577 {
1578 nvlist_t *tryconfig, *config;
1579 int error;
1580
1581 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1582 zc->zc_iflags, &tryconfig)) != 0)
1583 return (error);
1584
1585 config = spa_tryimport(tryconfig);
1586
1587 nvlist_free(tryconfig);
1588
1589 if (config == NULL)
1590 return (SET_ERROR(EINVAL));
1591
1592 error = put_nvlist(zc, config);
1593 nvlist_free(config);
1594
1595 return (error);
1596 }
1597
1598 /*
1599 * inputs:
1600 * zc_name name of the pool
1601 * zc_cookie scan func (pool_scan_func_t)
1602 */
1603 static int
1604 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1605 {
1606 spa_t *spa;
1607 int error;
1608
1609 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1610 return (error);
1611
1612 if (zc->zc_cookie == POOL_SCAN_NONE)
1613 error = spa_scan_stop(spa);
1614 else
1615 error = spa_scan(spa, zc->zc_cookie);
1616
1617 spa_close(spa, FTAG);
1618
1619 return (error);
1620 }
1621
1622 static int
1623 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1624 {
1625 spa_t *spa;
1626 int error;
1627
1628 error = spa_open(zc->zc_name, &spa, FTAG);
1629 if (error == 0) {
1630 spa_freeze(spa);
1631 spa_close(spa, FTAG);
1632 }
1633 return (error);
1634 }
1635
1636 static int
1637 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1638 {
1639 spa_t *spa;
1640 int error;
1641
1642 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1643 return (error);
1644
1645 if (zc->zc_cookie < spa_version(spa) ||
1646 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1647 spa_close(spa, FTAG);
1648 return (SET_ERROR(EINVAL));
1649 }
1650
1651 spa_upgrade(spa, zc->zc_cookie);
1652 spa_close(spa, FTAG);
1653
1654 return (error);
1655 }
1656
1657 static int
1658 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1659 {
1660 spa_t *spa;
1661 char *hist_buf;
1662 uint64_t size;
1663 int error;
1664
1665 if ((size = zc->zc_history_len) == 0)
1666 return (SET_ERROR(EINVAL));
1667
1668 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1669 return (error);
1670
1671 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1672 spa_close(spa, FTAG);
1673 return (SET_ERROR(ENOTSUP));
1674 }
1675
1676 hist_buf = kmem_alloc(size, KM_SLEEP);
1677 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1678 &zc->zc_history_len, hist_buf)) == 0) {
1679 error = ddi_copyout(hist_buf,
1680 (void *)(uintptr_t)zc->zc_history,
1681 zc->zc_history_len, zc->zc_iflags);
1682 }
1683
1684 spa_close(spa, FTAG);
1685 kmem_free(hist_buf, size);
1686 return (error);
1687 }
1688
1689 static int
1690 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1691 {
1692 spa_t *spa;
1693 int error;
1694
1695 error = spa_open(zc->zc_name, &spa, FTAG);
1696 if (error == 0) {
1697 error = spa_change_guid(spa);
1698 spa_close(spa, FTAG);
1699 }
1700 return (error);
1701 }
1702
1703 static int
1704 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1705 {
1706 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1707 }
1708
1709 /*
1710 * inputs:
1711 * zc_name name of filesystem
1712 * zc_obj object to find
1713 *
1714 * outputs:
1715 * zc_value name of object
1716 */
1717 static int
1718 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1719 {
1720 objset_t *os;
1721 int error;
1722
1723 /* XXX reading from objset not owned */
1724 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1725 return (error);
1726 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1727 dmu_objset_rele(os, FTAG);
1728 return (SET_ERROR(EINVAL));
1729 }
1730 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1731 sizeof (zc->zc_value));
1732 dmu_objset_rele(os, FTAG);
1733
1734 return (error);
1735 }
1736
1737 /*
1738 * inputs:
1739 * zc_name name of filesystem
1740 * zc_obj object to find
1741 *
1742 * outputs:
1743 * zc_stat stats on object
1744 * zc_value path to object
1745 */
1746 static int
1747 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1748 {
1749 objset_t *os;
1750 int error;
1751
1752 /* XXX reading from objset not owned */
1753 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1754 return (error);
1755 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1756 dmu_objset_rele(os, FTAG);
1757 return (SET_ERROR(EINVAL));
1758 }
1759 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1760 sizeof (zc->zc_value));
1761 dmu_objset_rele(os, FTAG);
1762
1763 return (error);
1764 }
1765
1766 static int
1767 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1768 {
1769 spa_t *spa;
1770 int error;
1771 nvlist_t *config, **l2cache, **spares;
1772 uint_t nl2cache = 0, nspares = 0;
1773
1774 error = spa_open(zc->zc_name, &spa, FTAG);
1775 if (error != 0)
1776 return (error);
1777
1778 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1779 zc->zc_iflags, &config);
1780 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1781 &l2cache, &nl2cache);
1782
1783 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1784 &spares, &nspares);
1785
1786 /*
1787 * A root pool with concatenated devices is not supported.
1788 * Thus, can not add a device to a root pool.
1789 *
1790 * Intent log device can not be added to a rootpool because
1791 * during mountroot, zil is replayed, a seperated log device
1792 * can not be accessed during the mountroot time.
1793 *
1794 * l2cache and spare devices are ok to be added to a rootpool.
1795 */
1796 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1797 nvlist_free(config);
1798 spa_close(spa, FTAG);
1799 return (SET_ERROR(EDOM));
1800 }
1801
1802 if (error == 0) {
1803 error = spa_vdev_add(spa, config);
1804 nvlist_free(config);
1805 }
1806 spa_close(spa, FTAG);
1807 return (error);
1808 }
1809
1810 /*
1811 * inputs:
1812 * zc_name name of the pool
1813 * zc_nvlist_conf nvlist of devices to remove
1814 * zc_cookie to stop the remove?
1815 */
1816 static int
1817 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1818 {
1819 spa_t *spa;
1820 int error;
1821
1822 error = spa_open(zc->zc_name, &spa, FTAG);
1823 if (error != 0)
1824 return (error);
1825 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1826 spa_close(spa, FTAG);
1827 return (error);
1828 }
1829
1830 static int
1831 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1832 {
1833 spa_t *spa;
1834 int error;
1835 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1836
1837 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1838 return (error);
1839 switch (zc->zc_cookie) {
1840 case VDEV_STATE_ONLINE:
1841 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1842 break;
1843
1844 case VDEV_STATE_OFFLINE:
1845 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1846 break;
1847
1848 case VDEV_STATE_FAULTED:
1849 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1850 zc->zc_obj != VDEV_AUX_EXTERNAL)
1851 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1852
1853 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1854 break;
1855
1856 case VDEV_STATE_DEGRADED:
1857 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1858 zc->zc_obj != VDEV_AUX_EXTERNAL)
1859 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1860
1861 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1862 break;
1863
1864 default:
1865 error = SET_ERROR(EINVAL);
1866 }
1867 zc->zc_cookie = newstate;
1868 spa_close(spa, FTAG);
1869 return (error);
1870 }
1871
1872 static int
1873 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1874 {
1875 spa_t *spa;
1876 int replacing = zc->zc_cookie;
1877 nvlist_t *config;
1878 int error;
1879
1880 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1881 return (error);
1882
1883 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1884 zc->zc_iflags, &config)) == 0) {
1885 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1886 nvlist_free(config);
1887 }
1888
1889 spa_close(spa, FTAG);
1890 return (error);
1891 }
1892
1893 static int
1894 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1895 {
1896 spa_t *spa;
1897 int error;
1898
1899 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1900 return (error);
1901
1902 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1903
1904 spa_close(spa, FTAG);
1905 return (error);
1906 }
1907
1908 static int
1909 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1910 {
1911 spa_t *spa;
1912 nvlist_t *config, *props = NULL;
1913 int error;
1914 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1915
1916 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1917 return (error);
1918
1919 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1920 zc->zc_iflags, &config)) {
1921 spa_close(spa, FTAG);
1922 return (error);
1923 }
1924
1925 if (zc->zc_nvlist_src_size != 0 && (error =
1926 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1927 zc->zc_iflags, &props))) {
1928 spa_close(spa, FTAG);
1929 nvlist_free(config);
1930 return (error);
1931 }
1932
1933 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1934
1935 spa_close(spa, FTAG);
1936
1937 nvlist_free(config);
1938 nvlist_free(props);
1939
1940 return (error);
1941 }
1942
1943 static int
1944 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
1945 {
1946 spa_t *spa;
1947 char *path = zc->zc_value;
1948 uint64_t guid = zc->zc_guid;
1949 int error;
1950
1951 error = spa_open(zc->zc_name, &spa, FTAG);
1952 if (error != 0)
1953 return (error);
1954
1955 error = spa_vdev_setpath(spa, guid, path);
1956 spa_close(spa, FTAG);
1957 return (error);
1958 }
1959
1960 static int
1961 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
1962 {
1963 spa_t *spa;
1964 char *fru = zc->zc_value;
1965 uint64_t guid = zc->zc_guid;
1966 int error;
1967
1968 error = spa_open(zc->zc_name, &spa, FTAG);
1969 if (error != 0)
1970 return (error);
1971
1972 error = spa_vdev_setfru(spa, guid, fru);
1973 spa_close(spa, FTAG);
1974 return (error);
1975 }
1976
1977 static int
1978 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
1979 {
1980 int error = 0;
1981 nvlist_t *nv;
1982
1983 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1984
1985 if (zc->zc_nvlist_dst != 0 &&
1986 (error = dsl_prop_get_all(os, &nv)) == 0) {
1987 dmu_objset_stats(os, nv);
1988 /*
1989 * NB: zvol_get_stats() will read the objset contents,
1990 * which we aren't supposed to do with a
1991 * DS_MODE_USER hold, because it could be
1992 * inconsistent. So this is a bit of a workaround...
1993 * XXX reading with out owning
1994 */
1995 if (!zc->zc_objset_stats.dds_inconsistent &&
1996 dmu_objset_type(os) == DMU_OST_ZVOL) {
1997 error = zvol_get_stats(os, nv);
1998 if (error == EIO)
1999 return (error);
2000 VERIFY0(error);
2001 }
2002 error = put_nvlist(zc, nv);
2003 nvlist_free(nv);
2004 }
2005
2006 return (error);
2007 }
2008
2009 /*
2010 * inputs:
2011 * zc_name name of filesystem
2012 * zc_nvlist_dst_size size of buffer for property nvlist
2013 *
2014 * outputs:
2015 * zc_objset_stats stats
2016 * zc_nvlist_dst property nvlist
2017 * zc_nvlist_dst_size size of property nvlist
2018 */
2019 static int
2020 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2021 {
2022 objset_t *os;
2023 int error;
2024
2025 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2026 if (error == 0) {
2027 error = zfs_ioc_objset_stats_impl(zc, os);
2028 dmu_objset_rele(os, FTAG);
2029 }
2030
2031 return (error);
2032 }
2033
2034 /*
2035 * inputs:
2036 * zc_name name of filesystem
2037 * zc_nvlist_dst_size size of buffer for property nvlist
2038 *
2039 * outputs:
2040 * zc_nvlist_dst received property nvlist
2041 * zc_nvlist_dst_size size of received property nvlist
2042 *
2043 * Gets received properties (distinct from local properties on or after
2044 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2045 * local property values.
2046 */
2047 static int
2048 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2049 {
2050 int error = 0;
2051 nvlist_t *nv;
2052
2053 /*
2054 * Without this check, we would return local property values if the
2055 * caller has not already received properties on or after
2056 * SPA_VERSION_RECVD_PROPS.
2057 */
2058 if (!dsl_prop_get_hasrecvd(zc->zc_name))
2059 return (SET_ERROR(ENOTSUP));
2060
2061 if (zc->zc_nvlist_dst != 0 &&
2062 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2063 error = put_nvlist(zc, nv);
2064 nvlist_free(nv);
2065 }
2066
2067 return (error);
2068 }
2069
2070 static int
2071 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2072 {
2073 uint64_t value;
2074 int error;
2075
2076 /*
2077 * zfs_get_zplprop() will either find a value or give us
2078 * the default value (if there is one).
2079 */
2080 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2081 return (error);
2082 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2083 return (0);
2084 }
2085
2086 /*
2087 * inputs:
2088 * zc_name name of filesystem
2089 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2090 *
2091 * outputs:
2092 * zc_nvlist_dst zpl property nvlist
2093 * zc_nvlist_dst_size size of zpl property nvlist
2094 */
2095 static int
2096 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2097 {
2098 objset_t *os;
2099 int err;
2100
2101 /* XXX reading without owning */
2102 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2103 return (err);
2104
2105 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2106
2107 /*
2108 * NB: nvl_add_zplprop() will read the objset contents,
2109 * which we aren't supposed to do with a DS_MODE_USER
2110 * hold, because it could be inconsistent.
2111 */
2112 if (zc->zc_nvlist_dst != NULL &&
2113 !zc->zc_objset_stats.dds_inconsistent &&
2114 dmu_objset_type(os) == DMU_OST_ZFS) {
2115 nvlist_t *nv;
2116
2117 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2118 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2119 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2120 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2121 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2122 err = put_nvlist(zc, nv);
2123 nvlist_free(nv);
2124 } else {
2125 err = SET_ERROR(ENOENT);
2126 }
2127 dmu_objset_rele(os, FTAG);
2128 return (err);
2129 }
2130
2131 static boolean_t
2132 dataset_name_hidden(const char *name)
2133 {
2134 /*
2135 * Skip over datasets that are not visible in this zone,
2136 * internal datasets (which have a $ in their name), and
2137 * temporary datasets (which have a % in their name).
2138 */
2139 if (strchr(name, '$') != NULL)
2140 return (B_TRUE);
2141 if (strchr(name, '%') != NULL)
2142 return (B_TRUE);
2143 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2144 return (B_TRUE);
2145 return (B_FALSE);
2146 }
2147
2148 /*
2149 * inputs:
2150 * zc_name name of filesystem
2151 * zc_cookie zap cursor
2152 * zc_nvlist_dst_size size of buffer for property nvlist
2153 *
2154 * outputs:
2155 * zc_name name of next filesystem
2156 * zc_cookie zap cursor
2157 * zc_objset_stats stats
2158 * zc_nvlist_dst property nvlist
2159 * zc_nvlist_dst_size size of property nvlist
2160 */
2161 static int
2162 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2163 {
2164 objset_t *os;
2165 int error;
2166 char *p;
2167 size_t orig_len = strlen(zc->zc_name);
2168
2169 top:
2170 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2171 if (error == ENOENT)
2172 error = SET_ERROR(ESRCH);
2173 return (error);
2174 }
2175
2176 p = strrchr(zc->zc_name, '/');
2177 if (p == NULL || p[1] != '\0')
2178 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2179 p = zc->zc_name + strlen(zc->zc_name);
2180
2181 do {
2182 error = dmu_dir_list_next(os,
2183 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2184 NULL, &zc->zc_cookie);
2185 if (error == ENOENT)
2186 error = SET_ERROR(ESRCH);
2187 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2188 dmu_objset_rele(os, FTAG);
2189
2190 /*
2191 * If it's an internal dataset (ie. with a '$' in its name),
2192 * don't try to get stats for it, otherwise we'll return ENOENT.
2193 */
2194 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2195 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2196 if (error == ENOENT) {
2197 /* We lost a race with destroy, get the next one. */
2198 zc->zc_name[orig_len] = '\0';
2199 goto top;
2200 }
2201 }
2202 return (error);
2203 }
2204
2205 /*
2206 * inputs:
2207 * zc_name name of filesystem
2208 * zc_cookie zap cursor
2209 * zc_nvlist_dst_size size of buffer for property nvlist
2210 *
2211 * outputs:
2212 * zc_name name of next snapshot
2213 * zc_objset_stats stats
2214 * zc_nvlist_dst property nvlist
2215 * zc_nvlist_dst_size size of property nvlist
2216 */
2217 static int
2218 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2219 {
2220 objset_t *os;
2221 int error;
2222
2223 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2224 if (error != 0) {
2225 return (error == ENOENT ? ESRCH : error);
2226 }
2227
2228 /*
2229 * A dataset name of maximum length cannot have any snapshots,
2230 * so exit immediately.
2231 */
2232 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2233 dmu_objset_rele(os, FTAG);
2234 return (SET_ERROR(ESRCH));
2235 }
2236
2237 error = dmu_snapshot_list_next(os,
2238 sizeof (zc->zc_name) - strlen(zc->zc_name),
2239 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2240 NULL);
2241
2242 if (error == 0) {
2243 dsl_dataset_t *ds;
2244 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2245
2246 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2247 if (error == 0) {
2248 objset_t *ossnap;
2249
2250 error = dmu_objset_from_ds(ds, &ossnap);
2251 if (error == 0)
2252 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2253 dsl_dataset_rele(ds, FTAG);
2254 }
2255 } else if (error == ENOENT) {
2256 error = SET_ERROR(ESRCH);
2257 }
2258
2259 dmu_objset_rele(os, FTAG);
2260 /* if we failed, undo the @ that we tacked on to zc_name */
2261 if (error != 0)
2262 *strchr(zc->zc_name, '@') = '\0';
2263 return (error);
2264 }
2265
2266 static int
2267 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2268 {
2269 const char *propname = nvpair_name(pair);
2270 uint64_t *valary;
2271 unsigned int vallen;
2272 const char *domain;
2273 char *dash;
2274 zfs_userquota_prop_t type;
2275 uint64_t rid;
2276 uint64_t quota;
2277 zfsvfs_t *zfsvfs;
2278 int err;
2279
2280 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2281 nvlist_t *attrs;
2282 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2283 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2284 &pair) != 0)
2285 return (SET_ERROR(EINVAL));
2286 }
2287
2288 /*
2289 * A correctly constructed propname is encoded as
2290 * userquota@<rid>-<domain>.
2291 */
2292 if ((dash = strchr(propname, '-')) == NULL ||
2293 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2294 vallen != 3)
2295 return (SET_ERROR(EINVAL));
2296
2297 domain = dash + 1;
2298 type = valary[0];
2299 rid = valary[1];
2300 quota = valary[2];
2301
2302 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2303 if (err == 0) {
2304 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2305 zfsvfs_rele(zfsvfs, FTAG);
2306 }
2307
2308 return (err);
2309 }
2310
2311 /*
2312 * If the named property is one that has a special function to set its value,
2313 * return 0 on success and a positive error code on failure; otherwise if it is
2314 * not one of the special properties handled by this function, return -1.
2315 *
2316 * XXX: It would be better for callers of the property interface if we handled
2317 * these special cases in dsl_prop.c (in the dsl layer).
2318 */
2319 static int
2320 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2321 nvpair_t *pair)
2322 {
2323 const char *propname = nvpair_name(pair);
2324 zfs_prop_t prop = zfs_name_to_prop(propname);
2325 uint64_t intval;
2326 int err;
2327
2328 if (prop == ZPROP_INVAL) {
2329 if (zfs_prop_userquota(propname))
2330 return (zfs_prop_set_userquota(dsname, pair));
2331 return (-1);
2332 }
2333
2334 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2335 nvlist_t *attrs;
2336 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2337 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2338 &pair) == 0);
2339 }
2340
2341 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2342 return (-1);
2343
2344 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2345
2346 switch (prop) {
2347 case ZFS_PROP_QUOTA:
2348 err = dsl_dir_set_quota(dsname, source, intval);
2349 break;
2350 case ZFS_PROP_REFQUOTA:
2351 err = dsl_dataset_set_refquota(dsname, source, intval);
2352 break;
2353 case ZFS_PROP_RESERVATION:
2354 err = dsl_dir_set_reservation(dsname, source, intval);
2355 break;
2356 case ZFS_PROP_REFRESERVATION:
2357 err = dsl_dataset_set_refreservation(dsname, source, intval);
2358 break;
2359 case ZFS_PROP_VOLSIZE:
2360 err = zvol_set_volsize(dsname, intval);
2361 break;
2362 case ZFS_PROP_VERSION:
2363 {
2364 zfsvfs_t *zfsvfs;
2365
2366 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2367 break;
2368
2369 err = zfs_set_version(zfsvfs, intval);
2370 zfsvfs_rele(zfsvfs, FTAG);
2371
2372 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2373 zfs_cmd_t *zc;
2374
2375 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2376 (void) strcpy(zc->zc_name, dsname);
2377 (void) zfs_ioc_userspace_upgrade(zc);
2378 kmem_free(zc, sizeof (zfs_cmd_t));
2379 }
2380 break;
2381 }
2382 case ZFS_PROP_COMPRESSION:
2383 {
2384 if (intval == ZIO_COMPRESS_LZ4) {
2385 spa_t *spa;
2386
2387 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
2388 return (err);
2389
2390 /*
2391 * Setting the LZ4 compression algorithm activates
2392 * the feature.
2393 */
2394 if (!spa_feature_is_active(spa,
2395 SPA_FEATURE_LZ4_COMPRESS)) {
2396 if ((err = zfs_prop_activate_feature(spa,
2397 SPA_FEATURE_LZ4_COMPRESS)) != 0) {
2398 spa_close(spa, FTAG);
2399 return (err);
2400 }
2401 }
2402
2403 spa_close(spa, FTAG);
2404 }
2405 /*
2406 * We still want the default set action to be performed in the
2407 * caller, we only performed zfeature settings here.
2408 */
2409 err = -1;
2410 break;
2411 }
2412
2413 default:
2414 err = -1;
2415 }
2416
2417 return (err);
2418 }
2419
2420 /*
2421 * This function is best effort. If it fails to set any of the given properties,
2422 * it continues to set as many as it can and returns the last error
2423 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2424 * with the list of names of all the properties that failed along with the
2425 * corresponding error numbers.
2426 *
2427 * If every property is set successfully, zero is returned and errlist is not
2428 * modified.
2429 */
2430 int
2431 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2432 nvlist_t *errlist)
2433 {
2434 nvpair_t *pair;
2435 nvpair_t *propval;
2436 int rv = 0;
2437 uint64_t intval;
2438 char *strval;
2439 nvlist_t *genericnvl = fnvlist_alloc();
2440 nvlist_t *retrynvl = fnvlist_alloc();
2441
2442 retry:
2443 pair = NULL;
2444 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2445 const char *propname = nvpair_name(pair);
2446 zfs_prop_t prop = zfs_name_to_prop(propname);
2447 int err = 0;
2448
2449 /* decode the property value */
2450 propval = pair;
2451 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2452 nvlist_t *attrs;
2453 attrs = fnvpair_value_nvlist(pair);
2454 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2455 &propval) != 0)
2456 err = SET_ERROR(EINVAL);
2457 }
2458
2459 /* Validate value type */
2460 if (err == 0 && prop == ZPROP_INVAL) {
2461 if (zfs_prop_user(propname)) {
2462 if (nvpair_type(propval) != DATA_TYPE_STRING)
2463 err = SET_ERROR(EINVAL);
2464 } else if (zfs_prop_userquota(propname)) {
2465 if (nvpair_type(propval) !=
2466 DATA_TYPE_UINT64_ARRAY)
2467 err = SET_ERROR(EINVAL);
2468 } else {
2469 err = SET_ERROR(EINVAL);
2470 }
2471 } else if (err == 0) {
2472 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2473 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2474 err = SET_ERROR(EINVAL);
2475 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2476 const char *unused;
2477
2478 intval = fnvpair_value_uint64(propval);
2479
2480 switch (zfs_prop_get_type(prop)) {
2481 case PROP_TYPE_NUMBER:
2482 break;
2483 case PROP_TYPE_STRING:
2484 err = SET_ERROR(EINVAL);
2485 break;
2486 case PROP_TYPE_INDEX:
2487 if (zfs_prop_index_to_string(prop,
2488 intval, &unused) != 0)
2489 err = SET_ERROR(EINVAL);
2490 break;
2491 default:
2492 cmn_err(CE_PANIC,
2493 "unknown property type");
2494 }
2495 } else {
2496 err = SET_ERROR(EINVAL);
2497 }
2498 }
2499
2500 /* Validate permissions */
2501 if (err == 0)
2502 err = zfs_check_settable(dsname, pair, CRED());
2503
2504 if (err == 0) {
2505 err = zfs_prop_set_special(dsname, source, pair);
2506 if (err == -1) {
2507 /*
2508 * For better performance we build up a list of
2509 * properties to set in a single transaction.
2510 */
2511 err = nvlist_add_nvpair(genericnvl, pair);
2512 } else if (err != 0 && nvl != retrynvl) {
2513 /*
2514 * This may be a spurious error caused by
2515 * receiving quota and reservation out of order.
2516 * Try again in a second pass.
2517 */
2518 err = nvlist_add_nvpair(retrynvl, pair);
2519 }
2520 }
2521
2522 if (err != 0) {
2523 if (errlist != NULL)
2524 fnvlist_add_int32(errlist, propname, err);
2525 rv = err;
2526 }
2527 }
2528
2529 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2530 nvl = retrynvl;
2531 goto retry;
2532 }
2533
2534 if (!nvlist_empty(genericnvl) &&
2535 dsl_props_set(dsname, source, genericnvl) != 0) {
2536 /*
2537 * If this fails, we still want to set as many properties as we
2538 * can, so try setting them individually.
2539 */
2540 pair = NULL;
2541 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2542 const char *propname = nvpair_name(pair);
2543 int err = 0;
2544
2545 propval = pair;
2546 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2547 nvlist_t *attrs;
2548 attrs = fnvpair_value_nvlist(pair);
2549 propval = fnvlist_lookup_nvpair(attrs,
2550 ZPROP_VALUE);
2551 }
2552
2553 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2554 strval = fnvpair_value_string(propval);
2555 err = dsl_prop_set_string(dsname, propname,
2556 source, strval);
2557 } else {
2558 intval = fnvpair_value_uint64(propval);
2559 err = dsl_prop_set_int(dsname, propname, source,
2560 intval);
2561 }
2562
2563 if (err != 0) {
2564 if (errlist != NULL) {
2565 fnvlist_add_int32(errlist, propname,
2566 err);
2567 }
2568 rv = err;
2569 }
2570 }
2571 }
2572 nvlist_free(genericnvl);
2573 nvlist_free(retrynvl);
2574
2575 return (rv);
2576 }
2577
2578 /*
2579 * Check that all the properties are valid user properties.
2580 */
2581 static int
2582 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2583 {
2584 nvpair_t *pair = NULL;
2585 int error = 0;
2586
2587 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2588 const char *propname = nvpair_name(pair);
2589 char *valstr;
2590
2591 if (!zfs_prop_user(propname) ||
2592 nvpair_type(pair) != DATA_TYPE_STRING)
2593 return (SET_ERROR(EINVAL));
2594
2595 if (error = zfs_secpolicy_write_perms(fsname,
2596 ZFS_DELEG_PERM_USERPROP, CRED()))
2597 return (error);
2598
2599 if (strlen(propname) >= ZAP_MAXNAMELEN)
2600 return (SET_ERROR(ENAMETOOLONG));
2601
2602 VERIFY(nvpair_value_string(pair, &valstr) == 0);
2603 if (strlen(valstr) >= ZAP_MAXVALUELEN)
2604 return (E2BIG);
2605 }
2606 return (0);
2607 }
2608
2609 static void
2610 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2611 {
2612 nvpair_t *pair;
2613
2614 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2615
2616 pair = NULL;
2617 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2618 if (nvlist_exists(skipped, nvpair_name(pair)))
2619 continue;
2620
2621 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2622 }
2623 }
2624
2625 static int
2626 clear_received_props(const char *dsname, nvlist_t *props,
2627 nvlist_t *skipped)
2628 {
2629 int err = 0;
2630 nvlist_t *cleared_props = NULL;
2631 props_skip(props, skipped, &cleared_props);
2632 if (!nvlist_empty(cleared_props)) {
2633 /*
2634 * Acts on local properties until the dataset has received
2635 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2636 */
2637 zprop_source_t flags = (ZPROP_SRC_NONE |
2638 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2639 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2640 }
2641 nvlist_free(cleared_props);
2642 return (err);
2643 }
2644
2645 /*
2646 * inputs:
2647 * zc_name name of filesystem
2648 * zc_value name of property to set
2649 * zc_nvlist_src{_size} nvlist of properties to apply
2650 * zc_cookie received properties flag
2651 *
2652 * outputs:
2653 * zc_nvlist_dst{_size} error for each unapplied received property
2654 */
2655 static int
2656 zfs_ioc_set_prop(zfs_cmd_t *zc)
2657 {
2658 nvlist_t *nvl;
2659 boolean_t received = zc->zc_cookie;
2660 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2661 ZPROP_SRC_LOCAL);
2662 nvlist_t *errors;
2663 int error;
2664
2665 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2666 zc->zc_iflags, &nvl)) != 0)
2667 return (error);
2668
2669 if (received) {
2670 nvlist_t *origprops;
2671
2672 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2673 (void) clear_received_props(zc->zc_name,
2674 origprops, nvl);
2675 nvlist_free(origprops);
2676 }
2677
2678 error = dsl_prop_set_hasrecvd(zc->zc_name);
2679 }
2680
2681 errors = fnvlist_alloc();
2682 if (error == 0)
2683 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2684
2685 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2686 (void) put_nvlist(zc, errors);
2687 }
2688
2689 nvlist_free(errors);
2690 nvlist_free(nvl);
2691 return (error);
2692 }
2693
2694 /*
2695 * inputs:
2696 * zc_name name of filesystem
2697 * zc_value name of property to inherit
2698 * zc_cookie revert to received value if TRUE
2699 *
2700 * outputs: none
2701 */
2702 static int
2703 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2704 {
2705 const char *propname = zc->zc_value;
2706 zfs_prop_t prop = zfs_name_to_prop(propname);
2707 boolean_t received = zc->zc_cookie;
2708 zprop_source_t source = (received
2709 ? ZPROP_SRC_NONE /* revert to received value, if any */
2710 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2711
2712 if (received) {
2713 nvlist_t *dummy;
2714 nvpair_t *pair;
2715 zprop_type_t type;
2716 int err;
2717
2718 /*
2719 * zfs_prop_set_special() expects properties in the form of an
2720 * nvpair with type info.
2721 */
2722 if (prop == ZPROP_INVAL) {
2723 if (!zfs_prop_user(propname))
2724 return (SET_ERROR(EINVAL));
2725
2726 type = PROP_TYPE_STRING;
2727 } else if (prop == ZFS_PROP_VOLSIZE ||
2728 prop == ZFS_PROP_VERSION) {
2729 return (SET_ERROR(EINVAL));
2730 } else {
2731 type = zfs_prop_get_type(prop);
2732 }
2733
2734 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2735
2736 switch (type) {
2737 case PROP_TYPE_STRING:
2738 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2739 break;
2740 case PROP_TYPE_NUMBER:
2741 case PROP_TYPE_INDEX:
2742 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2743 break;
2744 default:
2745 nvlist_free(dummy);
2746 return (SET_ERROR(EINVAL));
2747 }
2748
2749 pair = nvlist_next_nvpair(dummy, NULL);
2750 err = zfs_prop_set_special(zc->zc_name, source, pair);
2751 nvlist_free(dummy);
2752 if (err != -1)
2753 return (err); /* special property already handled */
2754 } else {
2755 /*
2756 * Only check this in the non-received case. We want to allow
2757 * 'inherit -S' to revert non-inheritable properties like quota
2758 * and reservation to the received or default values even though
2759 * they are not considered inheritable.
2760 */
2761 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2762 return (SET_ERROR(EINVAL));
2763 }
2764
2765 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2766 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2767 }
2768
2769 static int
2770 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2771 {
2772 nvlist_t *props;
2773 spa_t *spa;
2774 int error;
2775 nvpair_t *pair;
2776
2777 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2778 zc->zc_iflags, &props))
2779 return (error);
2780
2781 /*
2782 * If the only property is the configfile, then just do a spa_lookup()
2783 * to handle the faulted case.
2784 */
2785 pair = nvlist_next_nvpair(props, NULL);
2786 if (pair != NULL && strcmp(nvpair_name(pair),
2787 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2788 nvlist_next_nvpair(props, pair) == NULL) {
2789 mutex_enter(&spa_namespace_lock);
2790 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2791 spa_configfile_set(spa, props, B_FALSE);
2792 spa_config_sync(spa, B_FALSE, B_TRUE);
2793 }
2794 mutex_exit(&spa_namespace_lock);
2795 if (spa != NULL) {
2796 nvlist_free(props);
2797 return (0);
2798 }
2799 }
2800
2801 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2802 nvlist_free(props);
2803 return (error);
2804 }
2805
2806 error = spa_prop_set(spa, props);
2807
2808 nvlist_free(props);
2809 spa_close(spa, FTAG);
2810
2811 return (error);
2812 }
2813
2814 static int
2815 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2816 {
2817 spa_t *spa;
2818 int error;
2819 nvlist_t *nvp = NULL;
2820
2821 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2822 /*
2823 * If the pool is faulted, there may be properties we can still
2824 * get (such as altroot and cachefile), so attempt to get them
2825 * anyway.
2826 */
2827 mutex_enter(&spa_namespace_lock);
2828 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2829 error = spa_prop_get(spa, &nvp);
2830 mutex_exit(&spa_namespace_lock);
2831 } else {
2832 error = spa_prop_get(spa, &nvp);
2833 spa_close(spa, FTAG);
2834 }
2835
2836 if (error == 0 && zc->zc_nvlist_dst != NULL)
2837 error = put_nvlist(zc, nvp);
2838 else
2839 error = SET_ERROR(EFAULT);
2840
2841 nvlist_free(nvp);
2842 return (error);
2843 }
2844
2845 /*
2846 * inputs:
2847 * zc_name name of filesystem
2848 * zc_nvlist_src{_size} nvlist of delegated permissions
2849 * zc_perm_action allow/unallow flag
2850 *
2851 * outputs: none
2852 */
2853 static int
2854 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2855 {
2856 int error;
2857 nvlist_t *fsaclnv = NULL;
2858
2859 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2860 zc->zc_iflags, &fsaclnv)) != 0)
2861 return (error);
2862
2863 /*
2864 * Verify nvlist is constructed correctly
2865 */
2866 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2867 nvlist_free(fsaclnv);
2868 return (SET_ERROR(EINVAL));
2869 }
2870
2871 /*
2872 * If we don't have PRIV_SYS_MOUNT, then validate
2873 * that user is allowed to hand out each permission in
2874 * the nvlist(s)
2875 */
2876
2877 error = secpolicy_zfs(CRED());
2878 if (error != 0) {
2879 if (zc->zc_perm_action == B_FALSE) {
2880 error = dsl_deleg_can_allow(zc->zc_name,
2881 fsaclnv, CRED());
2882 } else {
2883 error = dsl_deleg_can_unallow(zc->zc_name,
2884 fsaclnv, CRED());
2885 }
2886 }
2887
2888 if (error == 0)
2889 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2890
2891 nvlist_free(fsaclnv);
2892 return (error);
2893 }
2894
2895 /*
2896 * inputs:
2897 * zc_name name of filesystem
2898 *
2899 * outputs:
2900 * zc_nvlist_src{_size} nvlist of delegated permissions
2901 */
2902 static int
2903 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2904 {
2905 nvlist_t *nvp;
2906 int error;
2907
2908 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2909 error = put_nvlist(zc, nvp);
2910 nvlist_free(nvp);
2911 }
2912
2913 return (error);
2914 }
2915
2916 /*
2917 * Search the vfs list for a specified resource. Returns a pointer to it
2918 * or NULL if no suitable entry is found. The caller of this routine
2919 * is responsible for releasing the returned vfs pointer.
2920 */
2921 static vfs_t *
2922 zfs_get_vfs(const char *resource)
2923 {
2924 struct vfs *vfsp;
2925 struct vfs *vfs_found = NULL;
2926
2927 vfs_list_read_lock();
2928 vfsp = rootvfs;
2929 do {
2930 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2931 VFS_HOLD(vfsp);
2932 vfs_found = vfsp;
2933 break;
2934 }
2935 vfsp = vfsp->vfs_next;
2936 } while (vfsp != rootvfs);
2937 vfs_list_unlock();
2938 return (vfs_found);
2939 }
2940
2941 /* ARGSUSED */
2942 static void
2943 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2944 {
2945 zfs_creat_t *zct = arg;
2946
2947 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2948 }
2949
2950 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2951
2952 /*
2953 * inputs:
2954 * os parent objset pointer (NULL if root fs)
2955 * fuids_ok fuids allowed in this version of the spa?
2956 * sa_ok SAs allowed in this version of the spa?
2957 * createprops list of properties requested by creator
2958 *
2959 * outputs:
2960 * zplprops values for the zplprops we attach to the master node object
2961 * is_ci true if requested file system will be purely case-insensitive
2962 *
2963 * Determine the settings for utf8only, normalization and
2964 * casesensitivity. Specific values may have been requested by the
2965 * creator and/or we can inherit values from the parent dataset. If
2966 * the file system is of too early a vintage, a creator can not
2967 * request settings for these properties, even if the requested
2968 * setting is the default value. We don't actually want to create dsl
2969 * properties for these, so remove them from the source nvlist after
2970 * processing.
2971 */
2972 static int
2973 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
2974 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
2975 nvlist_t *zplprops, boolean_t *is_ci)
2976 {
2977 uint64_t sense = ZFS_PROP_UNDEFINED;
2978 uint64_t norm = ZFS_PROP_UNDEFINED;
2979 uint64_t u8 = ZFS_PROP_UNDEFINED;
2980
2981 ASSERT(zplprops != NULL);
2982
2983 /*
2984 * Pull out creator prop choices, if any.
2985 */
2986 if (createprops) {
2987 (void) nvlist_lookup_uint64(createprops,
2988 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
2989 (void) nvlist_lookup_uint64(createprops,
2990 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
2991 (void) nvlist_remove_all(createprops,
2992 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
2993 (void) nvlist_lookup_uint64(createprops,
2994 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
2995 (void) nvlist_remove_all(createprops,
2996 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
2997 (void) nvlist_lookup_uint64(createprops,
2998 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
2999 (void) nvlist_remove_all(createprops,
3000 zfs_prop_to_name(ZFS_PROP_CASE));
3001 }
3002
3003 /*
3004 * If the zpl version requested is whacky or the file system
3005 * or pool is version is too "young" to support normalization
3006 * and the creator tried to set a value for one of the props,
3007 * error out.
3008 */
3009 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3010 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3011 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3012 (zplver < ZPL_VERSION_NORMALIZATION &&
3013 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3014 sense != ZFS_PROP_UNDEFINED)))
3015 return (SET_ERROR(ENOTSUP));
3016
3017 /*
3018 * Put the version in the zplprops
3019 */
3020 VERIFY(nvlist_add_uint64(zplprops,
3021 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3022
3023 if (norm == ZFS_PROP_UNDEFINED)
3024 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3025 VERIFY(nvlist_add_uint64(zplprops,
3026 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3027
3028 /*
3029 * If we're normalizing, names must always be valid UTF-8 strings.
3030 */
3031 if (norm)
3032 u8 = 1;
3033 if (u8 == ZFS_PROP_UNDEFINED)
3034 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3035 VERIFY(nvlist_add_uint64(zplprops,
3036 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3037
3038 if (sense == ZFS_PROP_UNDEFINED)
3039 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3040 VERIFY(nvlist_add_uint64(zplprops,
3041 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3042
3043 if (is_ci)
3044 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3045
3046 return (0);
3047 }
3048
3049 static int
3050 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3051 nvlist_t *zplprops, boolean_t *is_ci)
3052 {
3053 boolean_t fuids_ok, sa_ok;
3054 uint64_t zplver = ZPL_VERSION;
3055 objset_t *os = NULL;
3056 char parentname[MAXNAMELEN];
3057 char *cp;
3058 spa_t *spa;
3059 uint64_t spa_vers;
3060 int error;
3061
3062 (void) strlcpy(parentname, dataset, sizeof (parentname));
3063 cp = strrchr(parentname, '/');
3064 ASSERT(cp != NULL);
3065 cp[0] = '\0';
3066
3067 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3068 return (error);
3069
3070 spa_vers = spa_version(spa);
3071 spa_close(spa, FTAG);
3072
3073 zplver = zfs_zpl_version_map(spa_vers);
3074 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3075 sa_ok = (zplver >= ZPL_VERSION_SA);
3076
3077 /*
3078 * Open parent object set so we can inherit zplprop values.
3079 */
3080 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3081 return (error);
3082
3083 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3084 zplprops, is_ci);
3085 dmu_objset_rele(os, FTAG);
3086 return (error);
3087 }
3088
3089 static int
3090 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3091 nvlist_t *zplprops, boolean_t *is_ci)
3092 {
3093 boolean_t fuids_ok;
3094 boolean_t sa_ok;
3095 uint64_t zplver = ZPL_VERSION;
3096 int error;
3097
3098 zplver = zfs_zpl_version_map(spa_vers);
3099 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3100 sa_ok = (zplver >= ZPL_VERSION_SA);
3101
3102 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3103 createprops, zplprops, is_ci);
3104 return (error);
3105 }
3106
3107 /*
3108 * innvl: {
3109 * "type" -> dmu_objset_type_t (int32)
3110 * (optional) "props" -> { prop -> value }
3111 * }
3112 *
3113 * outnvl: propname -> error code (int32)
3114 */
3115 static int
3116 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3117 {
3118 int error = 0;
3119 zfs_creat_t zct = { 0 };
3120 nvlist_t *nvprops = NULL;
3121 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3122 int32_t type32;
3123 dmu_objset_type_t type;
3124 boolean_t is_insensitive = B_FALSE;
3125
3126 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3127 return (SET_ERROR(EINVAL));
3128 type = type32;
3129 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3130
3131 switch (type) {
3132 case DMU_OST_ZFS:
3133 cbfunc = zfs_create_cb;
3134 break;
3135
3136 case DMU_OST_ZVOL:
3137 cbfunc = zvol_create_cb;
3138 break;
3139
3140 default:
3141 cbfunc = NULL;
3142 break;
3143 }
3144 if (strchr(fsname, '@') ||
3145 strchr(fsname, '%'))
3146 return (SET_ERROR(EINVAL));
3147
3148 zct.zct_props = nvprops;
3149
3150 if (cbfunc == NULL)
3151 return (SET_ERROR(EINVAL));
3152
3153 if (type == DMU_OST_ZVOL) {
3154 uint64_t volsize, volblocksize;
3155
3156 if (nvprops == NULL)
3157 return (SET_ERROR(EINVAL));
3158 if (nvlist_lookup_uint64(nvprops,
3159 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3160 return (SET_ERROR(EINVAL));
3161
3162 if ((error = nvlist_lookup_uint64(nvprops,
3163 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3164 &volblocksize)) != 0 && error != ENOENT)
3165 return (SET_ERROR(EINVAL));
3166
3167 if (error != 0)
3168 volblocksize = zfs_prop_default_numeric(
3169 ZFS_PROP_VOLBLOCKSIZE);
3170
3171 if ((error = zvol_check_volblocksize(
3172 volblocksize)) != 0 ||
3173 (error = zvol_check_volsize(volsize,
3174 volblocksize)) != 0)
3175 return (error);
3176 } else if (type == DMU_OST_ZFS) {
3177 int error;
3178
3179 /*
3180 * We have to have normalization and
3181 * case-folding flags correct when we do the
3182 * file system creation, so go figure them out
3183 * now.
3184 */
3185 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3186 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3187 error = zfs_fill_zplprops(fsname, nvprops,
3188 zct.zct_zplprops, &is_insensitive);
3189 if (error != 0) {
3190 nvlist_free(zct.zct_zplprops);
3191 return (error);
3192 }
3193 }
3194
3195 error = dmu_objset_create(fsname, type,
3196 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3197 nvlist_free(zct.zct_zplprops);
3198
3199 /*
3200 * It would be nice to do this atomically.
3201 */
3202 if (error == 0) {
3203 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3204 nvprops, outnvl);
3205 if (error != 0)
3206 (void) dsl_destroy_head(fsname);
3207 }
3208 return (error);
3209 }
3210
3211 /*
3212 * innvl: {
3213 * "origin" -> name of origin snapshot
3214 * (optional) "props" -> { prop -> value }
3215 * }
3216 *
3217 * outnvl: propname -> error code (int32)
3218 */
3219 static int
3220 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3221 {
3222 int error = 0;
3223 nvlist_t *nvprops = NULL;
3224 char *origin_name;
3225
3226 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3227 return (SET_ERROR(EINVAL));
3228 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3229
3230 if (strchr(fsname, '@') ||
3231 strchr(fsname, '%'))
3232 return (SET_ERROR(EINVAL));
3233
3234 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3235 return (SET_ERROR(EINVAL));
3236 error = dmu_objset_clone(fsname, origin_name);
3237 if (error != 0)
3238 return (error);
3239
3240 /*
3241 * It would be nice to do this atomically.
3242 */
3243 if (error == 0) {
3244 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3245 nvprops, outnvl);
3246 if (error != 0)
3247 (void) dsl_destroy_head(fsname);
3248 }
3249 return (error);
3250 }
3251
3252 /*
3253 * innvl: {
3254 * "snaps" -> { snapshot1, snapshot2 }
3255 * (optional) "props" -> { prop -> value (string) }
3256 * }
3257 *
3258 * outnvl: snapshot -> error code (int32)
3259 */
3260 static int
3261 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3262 {
3263 nvlist_t *snaps;
3264 nvlist_t *props = NULL;
3265 int error, poollen;
3266 nvpair_t *pair;
3267
3268 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3269 if ((error = zfs_check_userprops(poolname, props)) != 0)
3270 return (error);
3271
3272 if (!nvlist_empty(props) &&
3273 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3274 return (SET_ERROR(ENOTSUP));
3275
3276 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3277 return (SET_ERROR(EINVAL));
3278 poollen = strlen(poolname);
3279 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3280 pair = nvlist_next_nvpair(snaps, pair)) {
3281 const char *name = nvpair_name(pair);
3282 const char *cp = strchr(name, '@');
3283
3284 /*
3285 * The snap name must contain an @, and the part after it must
3286 * contain only valid characters.
3287 */
3288 if (cp == NULL || snapshot_namecheck(cp + 1, NULL, NULL) != 0)
3289 return (SET_ERROR(EINVAL));
3290
3291 /*
3292 * The snap must be in the specified pool.
3293 */
3294 if (strncmp(name, poolname, poollen) != 0 ||
3295 (name[poollen] != '/' && name[poollen] != '@'))
3296 return (SET_ERROR(EXDEV));
3297
3298 /* This must be the only snap of this fs. */
3299 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3300 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3301 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3302 == 0) {
3303 return (SET_ERROR(EXDEV));
3304 }
3305 }
3306 }
3307
3308 error = dsl_dataset_snapshot(snaps, props, outnvl);
3309 return (error);
3310 }
3311
3312 /*
3313 * innvl: "message" -> string
3314 */
3315 /* ARGSUSED */
3316 static int
3317 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3318 {
3319 char *message;
3320 spa_t *spa;
3321 int error;
3322 char *poolname;
3323
3324 /*
3325 * The poolname in the ioctl is not set, we get it from the TSD,
3326 * which was set at the end of the last successful ioctl that allows
3327 * logging. The secpolicy func already checked that it is set.
3328 * Only one log ioctl is allowed after each successful ioctl, so
3329 * we clear the TSD here.
3330 */
3331 poolname = tsd_get(zfs_allow_log_key);
3332 (void) tsd_set(zfs_allow_log_key, NULL);
3333 error = spa_open(poolname, &spa, FTAG);
3334 strfree(poolname);
3335 if (error != 0)
3336 return (error);
3337
3338 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3339 spa_close(spa, FTAG);
3340 return (SET_ERROR(EINVAL));
3341 }
3342
3343 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3344 spa_close(spa, FTAG);
3345 return (SET_ERROR(ENOTSUP));
3346 }
3347
3348 error = spa_history_log(spa, message);
3349 spa_close(spa, FTAG);
3350 return (error);
3351 }
3352
3353 /*
3354 * The dp_config_rwlock must not be held when calling this, because the
3355 * unmount may need to write out data.
3356 *
3357 * This function is best-effort. Callers must deal gracefully if it
3358 * remains mounted (or is remounted after this call).
3359 *
3360 * Returns 0 if the argument is not a snapshot, or it is not currently a
3361 * filesystem, or we were able to unmount it. Returns error code otherwise.
3362 */
3363 int
3364 zfs_unmount_snap(const char *snapname)
3365 {
3366 vfs_t *vfsp;
3367 zfsvfs_t *zfsvfs;
3368 int err;
3369
3370 if (strchr(snapname, '@') == NULL)
3371 return (0);
3372
3373 vfsp = zfs_get_vfs(snapname);
3374 if (vfsp == NULL)
3375 return (0);
3376
3377 zfsvfs = vfsp->vfs_data;
3378 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3379
3380 err = vn_vfswlock(vfsp->vfs_vnodecovered);
3381 VFS_RELE(vfsp);
3382 if (err != 0)
3383 return (SET_ERROR(err));
3384
3385 /*
3386 * Always force the unmount for snapshots.
3387 */
3388 (void) dounmount(vfsp, MS_FORCE, kcred);
3389 return (0);
3390 }
3391
3392 /* ARGSUSED */
3393 static int
3394 zfs_unmount_snap_cb(const char *snapname, void *arg)
3395 {
3396 return (zfs_unmount_snap(snapname));
3397 }
3398
3399 /*
3400 * When a clone is destroyed, its origin may also need to be destroyed,
3401 * in which case it must be unmounted. This routine will do that unmount
3402 * if necessary.
3403 */
3404 void
3405 zfs_destroy_unmount_origin(const char *fsname)
3406 {
3407 int error;
3408 objset_t *os;
3409 dsl_dataset_t *ds;
3410
3411 error = dmu_objset_hold(fsname, FTAG, &os);
3412 if (error != 0)
3413 return;
3414 ds = dmu_objset_ds(os);
3415 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3416 char originname[MAXNAMELEN];
3417 dsl_dataset_name(ds->ds_prev, originname);
3418 dmu_objset_rele(os, FTAG);
3419 (void) zfs_unmount_snap(originname);
3420 } else {
3421 dmu_objset_rele(os, FTAG);
3422 }
3423 }
3424
3425 /*
3426 * innvl: {
3427 * "snaps" -> { snapshot1, snapshot2 }
3428 * (optional boolean) "defer"
3429 * }
3430 *
3431 * outnvl: snapshot -> error code (int32)
3432 *
3433 */
3434 static int
3435 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3436 {
3437 int error, poollen;
3438 nvlist_t *snaps;
3439 nvpair_t *pair;
3440 boolean_t defer;
3441
3442 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3443 return (SET_ERROR(EINVAL));
3444 defer = nvlist_exists(innvl, "defer");
3445
3446 poollen = strlen(poolname);
3447 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3448 pair = nvlist_next_nvpair(snaps, pair)) {
3449 const char *name = nvpair_name(pair);
3450
3451 /*
3452 * The snap must be in the specified pool.
3453 */
3454 if (strncmp(name, poolname, poollen) != 0 ||
3455 (name[poollen] != '/' && name[poollen] != '@'))
3456 return (SET_ERROR(EXDEV));
3457
3458 error = zfs_unmount_snap(name);
3459 if (error != 0)
3460 return (error);
3461 }
3462
3463 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3464 }
3465
3466 /*
3467 * inputs:
3468 * zc_name name of dataset to destroy
3469 * zc_objset_type type of objset
3470 * zc_defer_destroy mark for deferred destroy
3471 *
3472 * outputs: none
3473 */
3474 static int
3475 zfs_ioc_destroy(zfs_cmd_t *zc)
3476 {
3477 int err;
3478
3479 if (zc->zc_objset_type == DMU_OST_ZFS) {
3480 err = zfs_unmount_snap(zc->zc_name);
3481 if (err != 0)
3482 return (err);
3483 }
3484
3485 if (strchr(zc->zc_name, '@'))
3486 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3487 else
3488 err = dsl_destroy_head(zc->zc_name);
3489 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3490 (void) zvol_remove_minor(zc->zc_name);
3491 return (err);
3492 }
3493
3494 /*
3495 * fsname is name of dataset to rollback (to most recent snapshot)
3496 *
3497 * innvl is not used.
3498 *
3499 * outnvl: "target" -> name of most recent snapshot
3500 * }
3501 */
3502 /* ARGSUSED */
3503 static int
3504 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl)
3505 {
3506 zfsvfs_t *zfsvfs;
3507 int error;
3508
3509 if (getzfsvfs(fsname, &zfsvfs) == 0) {
3510 error = zfs_suspend_fs(zfsvfs);
3511 if (error == 0) {
3512 int resume_err;
3513
3514 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl);
3515 resume_err = zfs_resume_fs(zfsvfs, fsname);
3516 error = error ? error : resume_err;
3517 }
3518 VFS_RELE(zfsvfs->z_vfs);
3519 } else {
3520 error = dsl_dataset_rollback(fsname, NULL, outnvl);
3521 }
3522 return (error);
3523 }
3524
3525 static int
3526 recursive_unmount(const char *fsname, void *arg)
3527 {
3528 const char *snapname = arg;
3529 char fullname[MAXNAMELEN];
3530
3531 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3532 return (zfs_unmount_snap(fullname));
3533 }
3534
3535 /*
3536 * inputs:
3537 * zc_name old name of dataset
3538 * zc_value new name of dataset
3539 * zc_cookie recursive flag (only valid for snapshots)
3540 *
3541 * outputs: none
3542 */
3543 static int
3544 zfs_ioc_rename(zfs_cmd_t *zc)
3545 {
3546 boolean_t recursive = zc->zc_cookie & 1;
3547 char *at;
3548
3549 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3550 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3551 strchr(zc->zc_value, '%'))
3552 return (SET_ERROR(EINVAL));
3553
3554 at = strchr(zc->zc_name, '@');
3555 if (at != NULL) {
3556 /* snaps must be in same fs */
3557 int error;
3558
3559 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3560 return (SET_ERROR(EXDEV));
3561 *at = '\0';
3562 if (zc->zc_objset_type == DMU_OST_ZFS) {
3563 error = dmu_objset_find(zc->zc_name,
3564 recursive_unmount, at + 1,
3565 recursive ? DS_FIND_CHILDREN : 0);
3566 if (error != 0) {
3567 *at = '@';
3568 return (error);
3569 }
3570 }
3571 error = dsl_dataset_rename_snapshot(zc->zc_name,
3572 at + 1, strchr(zc->zc_value, '@') + 1, recursive);
3573 *at = '@';
3574
3575 return (error);
3576 } else {
3577 if (zc->zc_objset_type == DMU_OST_ZVOL)
3578 (void) zvol_remove_minor(zc->zc_name);
3579 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3580 }
3581 }
3582
3583 static int
3584 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3585 {
3586 const char *propname = nvpair_name(pair);
3587 boolean_t issnap = (strchr(dsname, '@') != NULL);
3588 zfs_prop_t prop = zfs_name_to_prop(propname);
3589 uint64_t intval;
3590 int err;
3591
3592 if (prop == ZPROP_INVAL) {
3593 if (zfs_prop_user(propname)) {
3594 if (err = zfs_secpolicy_write_perms(dsname,
3595 ZFS_DELEG_PERM_USERPROP, cr))
3596 return (err);
3597 return (0);
3598 }
3599
3600 if (!issnap && zfs_prop_userquota(propname)) {
3601 const char *perm = NULL;
3602 const char *uq_prefix =
3603 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3604 const char *gq_prefix =
3605 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3606
3607 if (strncmp(propname, uq_prefix,
3608 strlen(uq_prefix)) == 0) {
3609 perm = ZFS_DELEG_PERM_USERQUOTA;
3610 } else if (strncmp(propname, gq_prefix,
3611 strlen(gq_prefix)) == 0) {
3612 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3613 } else {
3614 /* USERUSED and GROUPUSED are read-only */
3615 return (SET_ERROR(EINVAL));
3616 }
3617
3618 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3619 return (err);
3620 return (0);
3621 }
3622
3623 return (SET_ERROR(EINVAL));
3624 }
3625
3626 if (issnap)
3627 return (SET_ERROR(EINVAL));
3628
3629 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3630 /*
3631 * dsl_prop_get_all_impl() returns properties in this
3632 * format.
3633 */
3634 nvlist_t *attrs;
3635 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3636 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3637 &pair) == 0);
3638 }
3639
3640 /*
3641 * Check that this value is valid for this pool version
3642 */
3643 switch (prop) {
3644 case ZFS_PROP_COMPRESSION:
3645 /*
3646 * If the user specified gzip compression, make sure
3647 * the SPA supports it. We ignore any errors here since
3648 * we'll catch them later.
3649 */
3650 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3651 nvpair_value_uint64(pair, &intval) == 0) {
3652 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3653 intval <= ZIO_COMPRESS_GZIP_9 &&
3654 zfs_earlier_version(dsname,
3655 SPA_VERSION_GZIP_COMPRESSION)) {
3656 return (SET_ERROR(ENOTSUP));
3657 }
3658
3659 if (intval == ZIO_COMPRESS_ZLE &&
3660 zfs_earlier_version(dsname,
3661 SPA_VERSION_ZLE_COMPRESSION))
3662 return (SET_ERROR(ENOTSUP));
3663
3664 if (intval == ZIO_COMPRESS_LZ4) {
3665 spa_t *spa;
3666
3667 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3668 return (err);
3669
3670 if (!spa_feature_is_enabled(spa,
3671 SPA_FEATURE_LZ4_COMPRESS)) {
3672 spa_close(spa, FTAG);
3673 return (SET_ERROR(ENOTSUP));
3674 }
3675 spa_close(spa, FTAG);
3676 }
3677
3678 /*
3679 * If this is a bootable dataset then
3680 * verify that the compression algorithm
3681 * is supported for booting. We must return
3682 * something other than ENOTSUP since it
3683 * implies a downrev pool version.
3684 */
3685 if (zfs_is_bootfs(dsname) &&
3686 !BOOTFS_COMPRESS_VALID(intval)) {
3687 return (SET_ERROR(ERANGE));
3688 }
3689 }
3690 break;
3691
3692 case ZFS_PROP_COPIES:
3693 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3694 return (SET_ERROR(ENOTSUP));
3695 break;
3696
3697 case ZFS_PROP_DEDUP:
3698 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3699 return (SET_ERROR(ENOTSUP));
3700 break;
3701
3702 case ZFS_PROP_SHARESMB:
3703 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3704 return (SET_ERROR(ENOTSUP));
3705 break;
3706
3707 case ZFS_PROP_ACLINHERIT:
3708 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3709 nvpair_value_uint64(pair, &intval) == 0) {
3710 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3711 zfs_earlier_version(dsname,
3712 SPA_VERSION_PASSTHROUGH_X))
3713 return (SET_ERROR(ENOTSUP));
3714 }
3715 break;
3716 }
3717
3718 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3719 }
3720
3721 /*
3722 * Checks for a race condition to make sure we don't increment a feature flag
3723 * multiple times.
3724 */
3725 static int
3726 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
3727 {
3728 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3729 spa_feature_t *featurep = arg;
3730
3731 if (!spa_feature_is_active(spa, *featurep))
3732 return (0);
3733 else
3734 return (SET_ERROR(EBUSY));
3735 }
3736
3737 /*
3738 * The callback invoked on feature activation in the sync task caused by
3739 * zfs_prop_activate_feature.
3740 */
3741 static void
3742 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
3743 {
3744 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3745 spa_feature_t *featurep = arg;
3746
3747 spa_feature_incr(spa, *featurep, tx);
3748 }
3749
3750 /*
3751 * Activates a feature on a pool in response to a property setting. This
3752 * creates a new sync task which modifies the pool to reflect the feature
3753 * as being active.
3754 */
3755 static int
3756 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature)
3757 {
3758 int err;
3759
3760 /* EBUSY here indicates that the feature is already active */
3761 err = dsl_sync_task(spa_name(spa),
3762 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
3763 &feature, 2);
3764
3765 if (err != 0 && err != EBUSY)
3766 return (err);
3767 else
3768 return (0);
3769 }
3770
3771 /*
3772 * Removes properties from the given props list that fail permission checks
3773 * needed to clear them and to restore them in case of a receive error. For each
3774 * property, make sure we have both set and inherit permissions.
3775 *
3776 * Returns the first error encountered if any permission checks fail. If the
3777 * caller provides a non-NULL errlist, it also gives the complete list of names
3778 * of all the properties that failed a permission check along with the
3779 * corresponding error numbers. The caller is responsible for freeing the
3780 * returned errlist.
3781 *
3782 * If every property checks out successfully, zero is returned and the list
3783 * pointed at by errlist is NULL.
3784 */
3785 static int
3786 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3787 {
3788 zfs_cmd_t *zc;
3789 nvpair_t *pair, *next_pair;
3790 nvlist_t *errors;
3791 int err, rv = 0;
3792
3793 if (props == NULL)
3794 return (0);
3795
3796 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3797
3798 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3799 (void) strcpy(zc->zc_name, dataset);
3800 pair = nvlist_next_nvpair(props, NULL);
3801 while (pair != NULL) {
3802 next_pair = nvlist_next_nvpair(props, pair);
3803
3804 (void) strcpy(zc->zc_value, nvpair_name(pair));
3805 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3806 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
3807 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3808 VERIFY(nvlist_add_int32(errors,
3809 zc->zc_value, err) == 0);
3810 }
3811 pair = next_pair;
3812 }
3813 kmem_free(zc, sizeof (zfs_cmd_t));
3814
3815 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3816 nvlist_free(errors);
3817 errors = NULL;
3818 } else {
3819 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3820 }
3821
3822 if (errlist == NULL)
3823 nvlist_free(errors);
3824 else
3825 *errlist = errors;
3826
3827 return (rv);
3828 }
3829
3830 static boolean_t
3831 propval_equals(nvpair_t *p1, nvpair_t *p2)
3832 {
3833 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3834 /* dsl_prop_get_all_impl() format */
3835 nvlist_t *attrs;
3836 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3837 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3838 &p1) == 0);
3839 }
3840
3841 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3842 nvlist_t *attrs;
3843 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3844 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3845 &p2) == 0);
3846 }
3847
3848 if (nvpair_type(p1) != nvpair_type(p2))
3849 return (B_FALSE);
3850
3851 if (nvpair_type(p1) == DATA_TYPE_STRING) {
3852 char *valstr1, *valstr2;
3853
3854 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
3855 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
3856 return (strcmp(valstr1, valstr2) == 0);
3857 } else {
3858 uint64_t intval1, intval2;
3859
3860 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
3861 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
3862 return (intval1 == intval2);
3863 }
3864 }
3865
3866 /*
3867 * Remove properties from props if they are not going to change (as determined
3868 * by comparison with origprops). Remove them from origprops as well, since we
3869 * do not need to clear or restore properties that won't change.
3870 */
3871 static void
3872 props_reduce(nvlist_t *props, nvlist_t *origprops)
3873 {
3874 nvpair_t *pair, *next_pair;
3875
3876 if (origprops == NULL)
3877 return; /* all props need to be received */
3878
3879 pair = nvlist_next_nvpair(props, NULL);
3880 while (pair != NULL) {
3881 const char *propname = nvpair_name(pair);
3882 nvpair_t *match;
3883
3884 next_pair = nvlist_next_nvpair(props, pair);
3885
3886 if ((nvlist_lookup_nvpair(origprops, propname,
3887 &match) != 0) || !propval_equals(pair, match))
3888 goto next; /* need to set received value */
3889
3890 /* don't clear the existing received value */
3891 (void) nvlist_remove_nvpair(origprops, match);
3892 /* don't bother receiving the property */
3893 (void) nvlist_remove_nvpair(props, pair);
3894 next:
3895 pair = next_pair;
3896 }
3897 }
3898
3899 #ifdef DEBUG
3900 static boolean_t zfs_ioc_recv_inject_err;
3901 #endif
3902
3903 /*
3904 * inputs:
3905 * zc_name name of containing filesystem
3906 * zc_nvlist_src{_size} nvlist of properties to apply
3907 * zc_value name of snapshot to create
3908 * zc_string name of clone origin (if DRR_FLAG_CLONE)
3909 * zc_cookie file descriptor to recv from
3910 * zc_begin_record the BEGIN record of the stream (not byteswapped)
3911 * zc_guid force flag
3912 * zc_cleanup_fd cleanup-on-exit file descriptor
3913 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
3914 *
3915 * outputs:
3916 * zc_cookie number of bytes read
3917 * zc_nvlist_dst{_size} error for each unapplied received property
3918 * zc_obj zprop_errflags_t
3919 * zc_action_handle handle for this guid/ds mapping
3920 */
3921 static int
3922 zfs_ioc_recv(zfs_cmd_t *zc)
3923 {
3924 file_t *fp;
3925 dmu_recv_cookie_t drc;
3926 boolean_t force = (boolean_t)zc->zc_guid;
3927 int fd;
3928 int error = 0;
3929 int props_error = 0;
3930 nvlist_t *errors;
3931 offset_t off;
3932 nvlist_t *props = NULL; /* sent properties */
3933 nvlist_t *origprops = NULL; /* existing properties */
3934 char *origin = NULL;
3935 char *tosnap;
3936 char tofs[ZFS_MAXNAMELEN];
3937 boolean_t first_recvd_props = B_FALSE;
3938
3939 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3940 strchr(zc->zc_value, '@') == NULL ||
3941 strchr(zc->zc_value, '%'))
3942 return (SET_ERROR(EINVAL));
3943
3944 (void) strcpy(tofs, zc->zc_value);
3945 tosnap = strchr(tofs, '@');
3946 *tosnap++ = '\0';
3947
3948 if (zc->zc_nvlist_src != NULL &&
3949 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
3950 zc->zc_iflags, &props)) != 0)
3951 return (error);
3952
3953 fd = zc->zc_cookie;
3954 fp = getf(fd);
3955 if (fp == NULL) {
3956 nvlist_free(props);
3957 return (SET_ERROR(EBADF));
3958 }
3959
3960 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3961
3962 if (zc->zc_string[0])
3963 origin = zc->zc_string;
3964
3965 error = dmu_recv_begin(tofs, tosnap,
3966 &zc->zc_begin_record, force, origin, &drc);
3967 if (error != 0)
3968 goto out;
3969
3970 /*
3971 * Set properties before we receive the stream so that they are applied
3972 * to the new data. Note that we must call dmu_recv_stream() if
3973 * dmu_recv_begin() succeeds.
3974 */
3975 if (props != NULL && !drc.drc_newfs) {
3976 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
3977 SPA_VERSION_RECVD_PROPS &&
3978 !dsl_prop_get_hasrecvd(tofs))
3979 first_recvd_props = B_TRUE;
3980
3981 /*
3982 * If new received properties are supplied, they are to
3983 * completely replace the existing received properties, so stash
3984 * away the existing ones.
3985 */
3986 if (dsl_prop_get_received(tofs, &origprops) == 0) {
3987 nvlist_t *errlist = NULL;
3988 /*
3989 * Don't bother writing a property if its value won't
3990 * change (and avoid the unnecessary security checks).
3991 *
3992 * The first receive after SPA_VERSION_RECVD_PROPS is a
3993 * special case where we blow away all local properties
3994 * regardless.
3995 */
3996 if (!first_recvd_props)
3997 props_reduce(props, origprops);
3998 if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
3999 (void) nvlist_merge(errors, errlist, 0);
4000 nvlist_free(errlist);
4001
4002 if (clear_received_props(tofs, origprops,
4003 first_recvd_props ? NULL : props) != 0)
4004 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4005 } else {
4006 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4007 }
4008 }
4009
4010 if (props != NULL) {
4011 props_error = dsl_prop_set_hasrecvd(tofs);
4012
4013 if (props_error == 0) {
4014 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4015 props, errors);
4016 }
4017 }
4018
4019 if (zc->zc_nvlist_dst_size != 0 &&
4020 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4021 put_nvlist(zc, errors) != 0)) {
4022 /*
4023 * Caller made zc->zc_nvlist_dst less than the minimum expected
4024 * size or supplied an invalid address.
4025 */
4026 props_error = SET_ERROR(EINVAL);
4027 }
4028
4029 off = fp->f_offset;
4030 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4031 &zc->zc_action_handle);
4032
4033 if (error == 0) {
4034 zfsvfs_t *zfsvfs = NULL;
4035
4036 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4037 /* online recv */
4038 int end_err;
4039
4040 error = zfs_suspend_fs(zfsvfs);
4041 /*
4042 * If the suspend fails, then the recv_end will
4043 * likely also fail, and clean up after itself.
4044 */
4045 end_err = dmu_recv_end(&drc, zfsvfs);
4046 if (error == 0)
4047 error = zfs_resume_fs(zfsvfs, tofs);
4048 error = error ? error : end_err;
4049 VFS_RELE(zfsvfs->z_vfs);
4050 } else {
4051 error = dmu_recv_end(&drc, NULL);
4052 }
4053 }
4054
4055 zc->zc_cookie = off - fp->f_offset;
4056 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4057 fp->f_offset = off;
4058
4059 #ifdef DEBUG
4060 if (zfs_ioc_recv_inject_err) {
4061 zfs_ioc_recv_inject_err = B_FALSE;
4062 error = 1;
4063 }
4064 #endif
4065 /*
4066 * On error, restore the original props.
4067 */
4068 if (error != 0 && props != NULL && !drc.drc_newfs) {
4069 if (clear_received_props(tofs, props, NULL) != 0) {
4070 /*
4071 * We failed to clear the received properties.
4072 * Since we may have left a $recvd value on the
4073 * system, we can't clear the $hasrecvd flag.
4074 */
4075 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4076 } else if (first_recvd_props) {
4077 dsl_prop_unset_hasrecvd(tofs);
4078 }
4079
4080 if (origprops == NULL && !drc.drc_newfs) {
4081 /* We failed to stash the original properties. */
4082 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4083 }
4084
4085 /*
4086 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4087 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4088 * explictly if we're restoring local properties cleared in the
4089 * first new-style receive.
4090 */
4091 if (origprops != NULL &&
4092 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4093 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4094 origprops, NULL) != 0) {
4095 /*
4096 * We stashed the original properties but failed to
4097 * restore them.
4098 */
4099 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4100 }
4101 }
4102 out:
4103 nvlist_free(props);
4104 nvlist_free(origprops);
4105 nvlist_free(errors);
4106 releasef(fd);
4107
4108 if (error == 0)
4109 error = props_error;
4110
4111 return (error);
4112 }
4113
4114 /*
4115 * inputs:
4116 * zc_name name of snapshot to send
4117 * zc_cookie file descriptor to send stream to
4118 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4119 * zc_sendobj objsetid of snapshot to send
4120 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4121 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4122 * output size in zc_objset_type.
4123 *
4124 * outputs: none
4125 */
4126 static int
4127 zfs_ioc_send(zfs_cmd_t *zc)
4128 {
4129 int error;
4130 offset_t off;
4131 boolean_t estimate = (zc->zc_guid != 0);
4132
4133 if (zc->zc_obj != 0) {
4134 dsl_pool_t *dp;
4135 dsl_dataset_t *tosnap;
4136
4137 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4138 if (error != 0)
4139 return (error);
4140
4141 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4142 if (error != 0) {
4143 dsl_pool_rele(dp, FTAG);
4144 return (error);
4145 }
4146
4147 if (dsl_dir_is_clone(tosnap->ds_dir))
4148 zc->zc_fromobj = tosnap->ds_dir->dd_phys->dd_origin_obj;
4149 dsl_dataset_rele(tosnap, FTAG);
4150 dsl_pool_rele(dp, FTAG);
4151 }
4152
4153 if (estimate) {
4154 dsl_pool_t *dp;
4155 dsl_dataset_t *tosnap;
4156 dsl_dataset_t *fromsnap = NULL;
4157
4158 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4159 if (error != 0)
4160 return (error);
4161
4162 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4163 if (error != 0) {
4164 dsl_pool_rele(dp, FTAG);
4165 return (error);
4166 }
4167
4168 if (zc->zc_fromobj != 0) {
4169 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4170 FTAG, &fromsnap);
4171 if (error != 0) {
4172 dsl_dataset_rele(tosnap, FTAG);
4173 dsl_pool_rele(dp, FTAG);
4174 return (error);
4175 }
4176 }
4177
4178 error = dmu_send_estimate(tosnap, fromsnap,
4179 &zc->zc_objset_type);
4180
4181 if (fromsnap != NULL)
4182 dsl_dataset_rele(fromsnap, FTAG);
4183 dsl_dataset_rele(tosnap, FTAG);
4184 dsl_pool_rele(dp, FTAG);
4185 } else {
4186 file_t *fp = getf(zc->zc_cookie);
4187 if (fp == NULL)
4188 return (SET_ERROR(EBADF));
4189
4190 off = fp->f_offset;
4191 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4192 zc->zc_fromobj, zc->zc_cookie, fp->f_vnode, &off);
4193
4194 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4195 fp->f_offset = off;
4196 releasef(zc->zc_cookie);
4197 }
4198 return (error);
4199 }
4200
4201 /*
4202 * inputs:
4203 * zc_name name of snapshot on which to report progress
4204 * zc_cookie file descriptor of send stream
4205 *
4206 * outputs:
4207 * zc_cookie number of bytes written in send stream thus far
4208 */
4209 static int
4210 zfs_ioc_send_progress(zfs_cmd_t *zc)
4211 {
4212 dsl_pool_t *dp;
4213 dsl_dataset_t *ds;
4214 dmu_sendarg_t *dsp = NULL;
4215 int error;
4216
4217 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4218 if (error != 0)
4219 return (error);
4220
4221 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4222 if (error != 0) {
4223 dsl_pool_rele(dp, FTAG);
4224 return (error);
4225 }
4226
4227 mutex_enter(&ds->ds_sendstream_lock);
4228
4229 /*
4230 * Iterate over all the send streams currently active on this dataset.
4231 * If there's one which matches the specified file descriptor _and_ the
4232 * stream was started by the current process, return the progress of
4233 * that stream.
4234 */
4235 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4236 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4237 if (dsp->dsa_outfd == zc->zc_cookie &&
4238 dsp->dsa_proc == curproc)
4239 break;
4240 }
4241
4242 if (dsp != NULL)
4243 zc->zc_cookie = *(dsp->dsa_off);
4244 else
4245 error = SET_ERROR(ENOENT);
4246
4247 mutex_exit(&ds->ds_sendstream_lock);
4248 dsl_dataset_rele(ds, FTAG);
4249 dsl_pool_rele(dp, FTAG);
4250 return (error);
4251 }
4252
4253 static int
4254 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4255 {
4256 int id, error;
4257
4258 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4259 &zc->zc_inject_record);
4260
4261 if (error == 0)
4262 zc->zc_guid = (uint64_t)id;
4263
4264 return (error);
4265 }
4266
4267 static int
4268 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4269 {
4270 return (zio_clear_fault((int)zc->zc_guid));
4271 }
4272
4273 static int
4274 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4275 {
4276 int id = (int)zc->zc_guid;
4277 int error;
4278
4279 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4280 &zc->zc_inject_record);
4281
4282 zc->zc_guid = id;
4283
4284 return (error);
4285 }
4286
4287 static int
4288 zfs_ioc_error_log(zfs_cmd_t *zc)
4289 {
4290 spa_t *spa;
4291 int error;
4292 size_t count = (size_t)zc->zc_nvlist_dst_size;
4293
4294 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4295 return (error);
4296
4297 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4298 &count);
4299 if (error == 0)
4300 zc->zc_nvlist_dst_size = count;
4301 else
4302 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4303
4304 spa_close(spa, FTAG);
4305
4306 return (error);
4307 }
4308
4309 static int
4310 zfs_ioc_clear(zfs_cmd_t *zc)
4311 {
4312 spa_t *spa;
4313 vdev_t *vd;
4314 int error;
4315
4316 /*
4317 * On zpool clear we also fix up missing slogs
4318 */
4319 mutex_enter(&spa_namespace_lock);
4320 spa = spa_lookup(zc->zc_name);
4321 if (spa == NULL) {
4322 mutex_exit(&spa_namespace_lock);
4323 return (SET_ERROR(EIO));
4324 }
4325 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4326 /* we need to let spa_open/spa_load clear the chains */
4327 spa_set_log_state(spa, SPA_LOG_CLEAR);
4328 }
4329 spa->spa_last_open_failed = 0;
4330 mutex_exit(&spa_namespace_lock);
4331
4332 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4333 error = spa_open(zc->zc_name, &spa, FTAG);
4334 } else {
4335 nvlist_t *policy;
4336 nvlist_t *config = NULL;
4337
4338 if (zc->zc_nvlist_src == NULL)
4339 return (SET_ERROR(EINVAL));
4340
4341 if ((error = get_nvlist(zc->zc_nvlist_src,
4342 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4343 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4344 policy, &config);
4345 if (config != NULL) {
4346 int err;
4347
4348 if ((err = put_nvlist(zc, config)) != 0)
4349 error = err;
4350 nvlist_free(config);
4351 }
4352 nvlist_free(policy);
4353 }
4354 }
4355
4356 if (error != 0)
4357 return (error);
4358
4359 spa_vdev_state_enter(spa, SCL_NONE);
4360
4361 if (zc->zc_guid == 0) {
4362 vd = NULL;
4363 } else {
4364 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4365 if (vd == NULL) {
4366 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4367 spa_close(spa, FTAG);
4368 return (SET_ERROR(ENODEV));
4369 }
4370 }
4371
4372 vdev_clear(spa, vd);
4373
4374 (void) spa_vdev_state_exit(spa, NULL, 0);
4375
4376 /*
4377 * Resume any suspended I/Os.
4378 */
4379 if (zio_resume(spa) != 0)
4380 error = SET_ERROR(EIO);
4381
4382 spa_close(spa, FTAG);
4383
4384 return (error);
4385 }
4386
4387 static int
4388 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4389 {
4390 spa_t *spa;
4391 int error;
4392
4393 error = spa_open(zc->zc_name, &spa, FTAG);
4394 if (error != 0)
4395 return (error);
4396
4397 spa_vdev_state_enter(spa, SCL_NONE);
4398
4399 /*
4400 * If a resilver is already in progress then set the
4401 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4402 * the scan as a side effect of the reopen. Otherwise, let
4403 * vdev_open() decided if a resilver is required.
4404 */
4405 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4406 vdev_reopen(spa->spa_root_vdev);
4407 spa->spa_scrub_reopen = B_FALSE;
4408
4409 (void) spa_vdev_state_exit(spa, NULL, 0);
4410 spa_close(spa, FTAG);
4411 return (0);
4412 }
4413 /*
4414 * inputs:
4415 * zc_name name of filesystem
4416 * zc_value name of origin snapshot
4417 *
4418 * outputs:
4419 * zc_string name of conflicting snapshot, if there is one
4420 */
4421 static int
4422 zfs_ioc_promote(zfs_cmd_t *zc)
4423 {
4424 char *cp;
4425
4426 /*
4427 * We don't need to unmount *all* the origin fs's snapshots, but
4428 * it's easier.
4429 */
4430 cp = strchr(zc->zc_value, '@');
4431 if (cp)
4432 *cp = '\0';
4433 (void) dmu_objset_find(zc->zc_value,
4434 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4435 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4436 }
4437
4438 /*
4439 * Retrieve a single {user|group}{used|quota}@... property.
4440 *
4441 * inputs:
4442 * zc_name name of filesystem
4443 * zc_objset_type zfs_userquota_prop_t
4444 * zc_value domain name (eg. "S-1-234-567-89")
4445 * zc_guid RID/UID/GID
4446 *
4447 * outputs:
4448 * zc_cookie property value
4449 */
4450 static int
4451 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4452 {
4453 zfsvfs_t *zfsvfs;
4454 int error;
4455
4456 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4457 return (SET_ERROR(EINVAL));
4458
4459 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4460 if (error != 0)
4461 return (error);
4462
4463 error = zfs_userspace_one(zfsvfs,
4464 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4465 zfsvfs_rele(zfsvfs, FTAG);
4466
4467 return (error);
4468 }
4469
4470 /*
4471 * inputs:
4472 * zc_name name of filesystem
4473 * zc_cookie zap cursor
4474 * zc_objset_type zfs_userquota_prop_t
4475 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4476 *
4477 * outputs:
4478 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4479 * zc_cookie zap cursor
4480 */
4481 static int
4482 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4483 {
4484 zfsvfs_t *zfsvfs;
4485 int bufsize = zc->zc_nvlist_dst_size;
4486
4487 if (bufsize <= 0)
4488 return (SET_ERROR(ENOMEM));
4489
4490 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4491 if (error != 0)
4492 return (error);
4493
4494 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4495
4496 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4497 buf, &zc->zc_nvlist_dst_size);
4498
4499 if (error == 0) {
4500 error = xcopyout(buf,
4501 (void *)(uintptr_t)zc->zc_nvlist_dst,
4502 zc->zc_nvlist_dst_size);
4503 }
4504 kmem_free(buf, bufsize);
4505 zfsvfs_rele(zfsvfs, FTAG);
4506
4507 return (error);
4508 }
4509
4510 /*
4511 * inputs:
4512 * zc_name name of filesystem
4513 *
4514 * outputs:
4515 * none
4516 */
4517 static int
4518 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4519 {
4520 objset_t *os;
4521 int error = 0;
4522 zfsvfs_t *zfsvfs;
4523
4524 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4525 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4526 /*
4527 * If userused is not enabled, it may be because the
4528 * objset needs to be closed & reopened (to grow the
4529 * objset_phys_t). Suspend/resume the fs will do that.
4530 */
4531 error = zfs_suspend_fs(zfsvfs);
4532 if (error == 0) {
4533 dmu_objset_refresh_ownership(zfsvfs->z_os,
4534 zfsvfs);
4535 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4536 }
4537 }
4538 if (error == 0)
4539 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4540 VFS_RELE(zfsvfs->z_vfs);
4541 } else {
4542 /* XXX kind of reading contents without owning */
4543 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4544 if (error != 0)
4545 return (error);
4546
4547 error = dmu_objset_userspace_upgrade(os);
4548 dmu_objset_rele(os, FTAG);
4549 }
4550
4551 return (error);
4552 }
4553
4554 /*
4555 * We don't want to have a hard dependency
4556 * against some special symbols in sharefs
4557 * nfs, and smbsrv. Determine them if needed when
4558 * the first file system is shared.
4559 * Neither sharefs, nfs or smbsrv are unloadable modules.
4560 */
4561 int (*znfsexport_fs)(void *arg);
4562 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4563 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4564
4565 int zfs_nfsshare_inited;
4566 int zfs_smbshare_inited;
4567
4568 ddi_modhandle_t nfs_mod;
4569 ddi_modhandle_t sharefs_mod;
4570 ddi_modhandle_t smbsrv_mod;
4571 kmutex_t zfs_share_lock;
4572
4573 static int
4574 zfs_init_sharefs()
4575 {
4576 int error;
4577
4578 ASSERT(MUTEX_HELD(&zfs_share_lock));
4579 /* Both NFS and SMB shares also require sharetab support. */
4580 if (sharefs_mod == NULL && ((sharefs_mod =
4581 ddi_modopen("fs/sharefs",
4582 KRTLD_MODE_FIRST, &error)) == NULL)) {
4583 return (SET_ERROR(ENOSYS));
4584 }
4585 if (zshare_fs == NULL && ((zshare_fs =
4586 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4587 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4588 return (SET_ERROR(ENOSYS));
4589 }
4590 return (0);
4591 }
4592
4593 static int
4594 zfs_ioc_share(zfs_cmd_t *zc)
4595 {
4596 int error;
4597 int opcode;
4598
4599 switch (zc->zc_share.z_sharetype) {
4600 case ZFS_SHARE_NFS:
4601 case ZFS_UNSHARE_NFS:
4602 if (zfs_nfsshare_inited == 0) {
4603 mutex_enter(&zfs_share_lock);
4604 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4605 KRTLD_MODE_FIRST, &error)) == NULL)) {
4606 mutex_exit(&zfs_share_lock);
4607 return (SET_ERROR(ENOSYS));
4608 }
4609 if (znfsexport_fs == NULL &&
4610 ((znfsexport_fs = (int (*)(void *))
4611 ddi_modsym(nfs_mod,
4612 "nfs_export", &error)) == NULL)) {
4613 mutex_exit(&zfs_share_lock);
4614 return (SET_ERROR(ENOSYS));
4615 }
4616 error = zfs_init_sharefs();
4617 if (error != 0) {
4618 mutex_exit(&zfs_share_lock);
4619 return (SET_ERROR(ENOSYS));
4620 }
4621 zfs_nfsshare_inited = 1;
4622 mutex_exit(&zfs_share_lock);
4623 }
4624 break;
4625 case ZFS_SHARE_SMB:
4626 case ZFS_UNSHARE_SMB:
4627 if (zfs_smbshare_inited == 0) {
4628 mutex_enter(&zfs_share_lock);
4629 if (smbsrv_mod == NULL && ((smbsrv_mod =
4630 ddi_modopen("drv/smbsrv",
4631 KRTLD_MODE_FIRST, &error)) == NULL)) {
4632 mutex_exit(&zfs_share_lock);
4633 return (SET_ERROR(ENOSYS));
4634 }
4635 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4636 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4637 "smb_server_share", &error)) == NULL)) {
4638 mutex_exit(&zfs_share_lock);
4639 return (SET_ERROR(ENOSYS));
4640 }
4641 error = zfs_init_sharefs();
4642 if (error != 0) {
4643 mutex_exit(&zfs_share_lock);
4644 return (SET_ERROR(ENOSYS));
4645 }
4646 zfs_smbshare_inited = 1;
4647 mutex_exit(&zfs_share_lock);
4648 }
4649 break;
4650 default:
4651 return (SET_ERROR(EINVAL));
4652 }
4653
4654 switch (zc->zc_share.z_sharetype) {
4655 case ZFS_SHARE_NFS:
4656 case ZFS_UNSHARE_NFS:
4657 if (error =
4658 znfsexport_fs((void *)
4659 (uintptr_t)zc->zc_share.z_exportdata))
4660 return (error);
4661 break;
4662 case ZFS_SHARE_SMB:
4663 case ZFS_UNSHARE_SMB:
4664 if (error = zsmbexport_fs((void *)
4665 (uintptr_t)zc->zc_share.z_exportdata,
4666 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4667 B_TRUE: B_FALSE)) {
4668 return (error);
4669 }
4670 break;
4671 }
4672
4673 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4674 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4675 SHAREFS_ADD : SHAREFS_REMOVE;
4676
4677 /*
4678 * Add or remove share from sharetab
4679 */
4680 error = zshare_fs(opcode,
4681 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4682 zc->zc_share.z_sharemax);
4683
4684 return (error);
4685
4686 }
4687
4688 ace_t full_access[] = {
4689 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4690 };
4691
4692 /*
4693 * inputs:
4694 * zc_name name of containing filesystem
4695 * zc_obj object # beyond which we want next in-use object #
4696 *
4697 * outputs:
4698 * zc_obj next in-use object #
4699 */
4700 static int
4701 zfs_ioc_next_obj(zfs_cmd_t *zc)
4702 {
4703 objset_t *os = NULL;
4704 int error;
4705
4706 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4707 if (error != 0)
4708 return (error);
4709
4710 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4711 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4712
4713 dmu_objset_rele(os, FTAG);
4714 return (error);
4715 }
4716
4717 /*
4718 * inputs:
4719 * zc_name name of filesystem
4720 * zc_value prefix name for snapshot
4721 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4722 *
4723 * outputs:
4724 * zc_value short name of new snapshot
4725 */
4726 static int
4727 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4728 {
4729 char *snap_name;
4730 char *hold_name;
4731 int error;
4732 minor_t minor;
4733
4734 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
4735 if (error != 0)
4736 return (error);
4737
4738 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
4739 (u_longlong_t)ddi_get_lbolt64());
4740 hold_name = kmem_asprintf("%%%s", zc->zc_value);
4741
4742 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
4743 hold_name);
4744 if (error == 0)
4745 (void) strcpy(zc->zc_value, snap_name);
4746 strfree(snap_name);
4747 strfree(hold_name);
4748 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
4749 return (error);
4750 }
4751
4752 /*
4753 * inputs:
4754 * zc_name name of "to" snapshot
4755 * zc_value name of "from" snapshot
4756 * zc_cookie file descriptor to write diff data on
4757 *
4758 * outputs:
4759 * dmu_diff_record_t's to the file descriptor
4760 */
4761 static int
4762 zfs_ioc_diff(zfs_cmd_t *zc)
4763 {
4764 file_t *fp;
4765 offset_t off;
4766 int error;
4767
4768 fp = getf(zc->zc_cookie);
4769 if (fp == NULL)
4770 return (SET_ERROR(EBADF));
4771
4772 off = fp->f_offset;
4773
4774 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
4775
4776 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4777 fp->f_offset = off;
4778 releasef(zc->zc_cookie);
4779
4780 return (error);
4781 }
4782
4783 /*
4784 * Remove all ACL files in shares dir
4785 */
4786 static int
4787 zfs_smb_acl_purge(znode_t *dzp)
4788 {
4789 zap_cursor_t zc;
4790 zap_attribute_t zap;
4791 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4792 int error;
4793
4794 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4795 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4796 zap_cursor_advance(&zc)) {
4797 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4798 NULL, 0)) != 0)
4799 break;
4800 }
4801 zap_cursor_fini(&zc);
4802 return (error);
4803 }
4804
4805 static int
4806 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4807 {
4808 vnode_t *vp;
4809 znode_t *dzp;
4810 vnode_t *resourcevp = NULL;
4811 znode_t *sharedir;
4812 zfsvfs_t *zfsvfs;
4813 nvlist_t *nvlist;
4814 char *src, *target;
4815 vattr_t vattr;
4816 vsecattr_t vsec;
4817 int error = 0;
4818
4819 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4820 NO_FOLLOW, NULL, &vp)) != 0)
4821 return (error);
4822
4823 /* Now make sure mntpnt and dataset are ZFS */
4824
4825 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4826 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4827 zc->zc_name) != 0)) {
4828 VN_RELE(vp);
4829 return (SET_ERROR(EINVAL));
4830 }
4831
4832 dzp = VTOZ(vp);
4833 zfsvfs = dzp->z_zfsvfs;
4834 ZFS_ENTER(zfsvfs);
4835
4836 /*
4837 * Create share dir if its missing.
4838 */
4839 mutex_enter(&zfsvfs->z_lock);
4840 if (zfsvfs->z_shares_dir == 0) {
4841 dmu_tx_t *tx;
4842
4843 tx = dmu_tx_create(zfsvfs->z_os);
4844 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
4845 ZFS_SHARES_DIR);
4846 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
4847 error = dmu_tx_assign(tx, TXG_WAIT);
4848 if (error != 0) {
4849 dmu_tx_abort(tx);
4850 } else {
4851 error = zfs_create_share_dir(zfsvfs, tx);
4852 dmu_tx_commit(tx);
4853 }
4854 if (error != 0) {
4855 mutex_exit(&zfsvfs->z_lock);
4856 VN_RELE(vp);
4857 ZFS_EXIT(zfsvfs);
4858 return (error);
4859 }
4860 }
4861 mutex_exit(&zfsvfs->z_lock);
4862
4863 ASSERT(zfsvfs->z_shares_dir);
4864 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
4865 VN_RELE(vp);
4866 ZFS_EXIT(zfsvfs);
4867 return (error);
4868 }
4869
4870 switch (zc->zc_cookie) {
4871 case ZFS_SMB_ACL_ADD:
4872 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
4873 vattr.va_type = VREG;
4874 vattr.va_mode = S_IFREG|0777;
4875 vattr.va_uid = 0;
4876 vattr.va_gid = 0;
4877
4878 vsec.vsa_mask = VSA_ACE;
4879 vsec.vsa_aclentp = &full_access;
4880 vsec.vsa_aclentsz = sizeof (full_access);
4881 vsec.vsa_aclcnt = 1;
4882
4883 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
4884 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
4885 if (resourcevp)
4886 VN_RELE(resourcevp);
4887 break;
4888
4889 case ZFS_SMB_ACL_REMOVE:
4890 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
4891 NULL, 0);
4892 break;
4893
4894 case ZFS_SMB_ACL_RENAME:
4895 if ((error = get_nvlist(zc->zc_nvlist_src,
4896 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
4897 VN_RELE(vp);
4898 ZFS_EXIT(zfsvfs);
4899 return (error);
4900 }
4901 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
4902 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
4903 &target)) {
4904 VN_RELE(vp);
4905 VN_RELE(ZTOV(sharedir));
4906 ZFS_EXIT(zfsvfs);
4907 nvlist_free(nvlist);
4908 return (error);
4909 }
4910 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
4911 kcred, NULL, 0);
4912 nvlist_free(nvlist);
4913 break;
4914
4915 case ZFS_SMB_ACL_PURGE:
4916 error = zfs_smb_acl_purge(sharedir);
4917 break;
4918
4919 default:
4920 error = SET_ERROR(EINVAL);
4921 break;
4922 }
4923
4924 VN_RELE(vp);
4925 VN_RELE(ZTOV(sharedir));
4926
4927 ZFS_EXIT(zfsvfs);
4928
4929 return (error);
4930 }
4931
4932 /*
4933 * innvl: {
4934 * "holds" -> { snapname -> holdname (string), ... }
4935 * (optional) "cleanup_fd" -> fd (int32)
4936 * }
4937 *
4938 * outnvl: {
4939 * snapname -> error value (int32)
4940 * ...
4941 * }
4942 */
4943 /* ARGSUSED */
4944 static int
4945 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
4946 {
4947 nvlist_t *holds;
4948 int cleanup_fd = -1;
4949 int error;
4950 minor_t minor = 0;
4951
4952 error = nvlist_lookup_nvlist(args, "holds", &holds);
4953 if (error != 0)
4954 return (SET_ERROR(EINVAL));
4955
4956 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
4957 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
4958 if (error != 0)
4959 return (error);
4960 }
4961
4962 error = dsl_dataset_user_hold(holds, minor, errlist);
4963 if (minor != 0)
4964 zfs_onexit_fd_rele(cleanup_fd);
4965 return (error);
4966 }
4967
4968 /*
4969 * innvl is not used.
4970 *
4971 * outnvl: {
4972 * holdname -> time added (uint64 seconds since epoch)
4973 * ...
4974 * }
4975 */
4976 /* ARGSUSED */
4977 static int
4978 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
4979 {
4980 return (dsl_dataset_get_holds(snapname, outnvl));
4981 }
4982
4983 /*
4984 * innvl: {
4985 * snapname -> { holdname, ... }
4986 * ...
4987 * }
4988 *
4989 * outnvl: {
4990 * snapname -> error value (int32)
4991 * ...
4992 * }
4993 */
4994 /* ARGSUSED */
4995 static int
4996 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
4997 {
4998 return (dsl_dataset_user_release(holds, errlist));
4999 }
5000
5001 /*
5002 * inputs:
5003 * zc_name name of new filesystem or snapshot
5004 * zc_value full name of old snapshot
5005 *
5006 * outputs:
5007 * zc_cookie space in bytes
5008 * zc_objset_type compressed space in bytes
5009 * zc_perm_action uncompressed space in bytes
5010 */
5011 static int
5012 zfs_ioc_space_written(zfs_cmd_t *zc)
5013 {
5014 int error;
5015 dsl_pool_t *dp;
5016 dsl_dataset_t *new, *old;
5017
5018 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5019 if (error != 0)
5020 return (error);
5021 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5022 if (error != 0) {
5023 dsl_pool_rele(dp, FTAG);
5024 return (error);
5025 }
5026 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5027 if (error != 0) {
5028 dsl_dataset_rele(new, FTAG);
5029 dsl_pool_rele(dp, FTAG);
5030 return (error);
5031 }
5032
5033 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5034 &zc->zc_objset_type, &zc->zc_perm_action);
5035 dsl_dataset_rele(old, FTAG);
5036 dsl_dataset_rele(new, FTAG);
5037 dsl_pool_rele(dp, FTAG);
5038 return (error);
5039 }
5040
5041 /*
5042 * innvl: {
5043 * "firstsnap" -> snapshot name
5044 * }
5045 *
5046 * outnvl: {
5047 * "used" -> space in bytes
5048 * "compressed" -> compressed space in bytes
5049 * "uncompressed" -> uncompressed space in bytes
5050 * }
5051 */
5052 static int
5053 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5054 {
5055 int error;
5056 dsl_pool_t *dp;
5057 dsl_dataset_t *new, *old;
5058 char *firstsnap;
5059 uint64_t used, comp, uncomp;
5060
5061 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5062 return (SET_ERROR(EINVAL));
5063
5064 error = dsl_pool_hold(lastsnap, FTAG, &dp);
5065 if (error != 0)
5066 return (error);
5067
5068 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5069 if (error != 0) {
5070 dsl_pool_rele(dp, FTAG);
5071 return (error);
5072 }
5073 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5074 if (error != 0) {
5075 dsl_dataset_rele(new, FTAG);
5076 dsl_pool_rele(dp, FTAG);
5077 return (error);
5078 }
5079
5080 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5081 dsl_dataset_rele(old, FTAG);
5082 dsl_dataset_rele(new, FTAG);
5083 dsl_pool_rele(dp, FTAG);
5084 fnvlist_add_uint64(outnvl, "used", used);
5085 fnvlist_add_uint64(outnvl, "compressed", comp);
5086 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5087 return (error);
5088 }
5089
5090 /*
5091 * innvl: {
5092 * "fd" -> file descriptor to write stream to (int32)
5093 * (optional) "fromsnap" -> full snap name to send an incremental from
5094 * }
5095 *
5096 * outnvl is unused
5097 */
5098 /* ARGSUSED */
5099 static int
5100 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5101 {
5102 int error;
5103 offset_t off;
5104 char *fromname = NULL;
5105 int fd;
5106
5107 error = nvlist_lookup_int32(innvl, "fd", &fd);
5108 if (error != 0)
5109 return (SET_ERROR(EINVAL));
5110
5111 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5112
5113 file_t *fp = getf(fd);
5114 if (fp == NULL)
5115 return (SET_ERROR(EBADF));
5116
5117 off = fp->f_offset;
5118 error = dmu_send(snapname, fromname, fd, fp->f_vnode, &off);
5119
5120 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5121 fp->f_offset = off;
5122 releasef(fd);
5123 return (error);
5124 }
5125
5126 /*
5127 * Determine approximately how large a zfs send stream will be -- the number
5128 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5129 *
5130 * innvl: {
5131 * (optional) "fromsnap" -> full snap name to send an incremental from
5132 * }
5133 *
5134 * outnvl: {
5135 * "space" -> bytes of space (uint64)
5136 * }
5137 */
5138 static int
5139 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5140 {
5141 dsl_pool_t *dp;
5142 dsl_dataset_t *fromsnap = NULL;
5143 dsl_dataset_t *tosnap;
5144 int error;
5145 char *fromname;
5146 uint64_t space;
5147
5148 error = dsl_pool_hold(snapname, FTAG, &dp);
5149 if (error != 0)
5150 return (error);
5151
5152 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5153 if (error != 0) {
5154 dsl_pool_rele(dp, FTAG);
5155 return (error);
5156 }
5157
5158 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5159 if (error == 0) {
5160 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5161 if (error != 0) {
5162 dsl_dataset_rele(tosnap, FTAG);
5163 dsl_pool_rele(dp, FTAG);
5164 return (error);
5165 }
5166 }
5167
5168 error = dmu_send_estimate(tosnap, fromsnap, &space);
5169 fnvlist_add_uint64(outnvl, "space", space);
5170
5171 if (fromsnap != NULL)
5172 dsl_dataset_rele(fromsnap, FTAG);
5173 dsl_dataset_rele(tosnap, FTAG);
5174 dsl_pool_rele(dp, FTAG);
5175 return (error);
5176 }
5177
5178
5179 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5180
5181 static void
5182 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5183 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5184 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5185 {
5186 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5187
5188 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5189 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5190 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5191 ASSERT3P(vec->zvec_func, ==, NULL);
5192
5193 vec->zvec_legacy_func = func;
5194 vec->zvec_secpolicy = secpolicy;
5195 vec->zvec_namecheck = namecheck;
5196 vec->zvec_allow_log = log_history;
5197 vec->zvec_pool_check = pool_check;
5198 }
5199
5200 /*
5201 * See the block comment at the beginning of this file for details on
5202 * each argument to this function.
5203 */
5204 static void
5205 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5206 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5207 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5208 boolean_t allow_log)
5209 {
5210 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5211
5212 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5213 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5214 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5215 ASSERT3P(vec->zvec_func, ==, NULL);
5216
5217 /* if we are logging, the name must be valid */
5218 ASSERT(!allow_log || namecheck != NO_NAME);
5219
5220 vec->zvec_name = name;
5221 vec->zvec_func = func;
5222 vec->zvec_secpolicy = secpolicy;
5223 vec->zvec_namecheck = namecheck;
5224 vec->zvec_pool_check = pool_check;
5225 vec->zvec_smush_outnvlist = smush_outnvlist;
5226 vec->zvec_allow_log = allow_log;
5227 }
5228
5229 static void
5230 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5231 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5232 zfs_ioc_poolcheck_t pool_check)
5233 {
5234 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5235 POOL_NAME, log_history, pool_check);
5236 }
5237
5238 static void
5239 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5240 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5241 {
5242 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5243 DATASET_NAME, B_FALSE, pool_check);
5244 }
5245
5246 static void
5247 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5248 {
5249 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5250 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5251 }
5252
5253 static void
5254 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5255 zfs_secpolicy_func_t *secpolicy)
5256 {
5257 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5258 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5259 }
5260
5261 static void
5262 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5263 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5264 {
5265 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5266 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5267 }
5268
5269 static void
5270 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5271 {
5272 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5273 zfs_secpolicy_read);
5274 }
5275
5276 static void
5277 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5278 zfs_secpolicy_func_t *secpolicy)
5279 {
5280 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5281 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5282 }
5283
5284 static void
5285 zfs_ioctl_init(void)
5286 {
5287 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5288 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5289 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5290
5291 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5292 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5293 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5294
5295 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5296 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5297 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5298
5299 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5300 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5301 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5302
5303 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5304 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5305 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5306
5307 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5308 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5309 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5310
5311 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5312 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5313 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5314
5315 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5316 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5317 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5318
5319 zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5320 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5321 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5322 zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5323 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5324 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5325
5326 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5327 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5328 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5329
5330 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
5331 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
5332 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5333
5334 /* IOCTLS that use the legacy function signature */
5335
5336 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5337 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5338
5339 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5340 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5341 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5342 zfs_ioc_pool_scan);
5343 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5344 zfs_ioc_pool_upgrade);
5345 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5346 zfs_ioc_vdev_add);
5347 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5348 zfs_ioc_vdev_remove);
5349 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5350 zfs_ioc_vdev_set_state);
5351 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5352 zfs_ioc_vdev_attach);
5353 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5354 zfs_ioc_vdev_detach);
5355 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5356 zfs_ioc_vdev_setpath);
5357 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5358 zfs_ioc_vdev_setfru);
5359 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5360 zfs_ioc_pool_set_props);
5361 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5362 zfs_ioc_vdev_split);
5363 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5364 zfs_ioc_pool_reguid);
5365
5366 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5367 zfs_ioc_pool_configs, zfs_secpolicy_none);
5368 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5369 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5370 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5371 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5372 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5373 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5374 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5375 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5376
5377 /*
5378 * pool destroy, and export don't log the history as part of
5379 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5380 * does the logging of those commands.
5381 */
5382 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5383 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5384 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5385 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5386
5387 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5388 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5389 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5390 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5391
5392 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5393 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5394 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5395 zfs_ioc_dsobj_to_dsname,
5396 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5397 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5398 zfs_ioc_pool_get_history,
5399 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5400
5401 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5402 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5403
5404 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5405 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5406 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5407 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5408
5409 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5410 zfs_ioc_space_written);
5411 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5412 zfs_ioc_objset_recvd_props);
5413 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5414 zfs_ioc_next_obj);
5415 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5416 zfs_ioc_get_fsacl);
5417 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5418 zfs_ioc_objset_stats);
5419 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5420 zfs_ioc_objset_zplprops);
5421 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5422 zfs_ioc_dataset_list_next);
5423 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5424 zfs_ioc_snapshot_list_next);
5425 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5426 zfs_ioc_send_progress);
5427
5428 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5429 zfs_ioc_diff, zfs_secpolicy_diff);
5430 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5431 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5432 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5433 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5434 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5435 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5436 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5437 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5438 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5439 zfs_ioc_send, zfs_secpolicy_send);
5440
5441 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5442 zfs_secpolicy_none);
5443 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5444 zfs_secpolicy_destroy);
5445 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5446 zfs_secpolicy_rename);
5447 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5448 zfs_secpolicy_recv);
5449 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5450 zfs_secpolicy_promote);
5451 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5452 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5453 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5454 zfs_secpolicy_set_fsacl);
5455
5456 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5457 zfs_secpolicy_share, POOL_CHECK_NONE);
5458 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5459 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5460 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5461 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5462 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5463 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5464 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5465 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5466 }
5467
5468 int
5469 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5470 zfs_ioc_poolcheck_t check)
5471 {
5472 spa_t *spa;
5473 int error;
5474
5475 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5476
5477 if (check & POOL_CHECK_NONE)
5478 return (0);
5479
5480 error = spa_open(name, &spa, FTAG);
5481 if (error == 0) {
5482 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5483 error = SET_ERROR(EAGAIN);
5484 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5485 error = SET_ERROR(EROFS);
5486 spa_close(spa, FTAG);
5487 }
5488 return (error);
5489 }
5490
5491 /*
5492 * Find a free minor number.
5493 */
5494 minor_t
5495 zfsdev_minor_alloc(void)
5496 {
5497 static minor_t last_minor;
5498 minor_t m;
5499
5500 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5501
5502 for (m = last_minor + 1; m != last_minor; m++) {
5503 if (m > ZFSDEV_MAX_MINOR)
5504 m = 1;
5505 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5506 last_minor = m;
5507 return (m);
5508 }
5509 }
5510
5511 return (0);
5512 }
5513
5514 static int
5515 zfs_ctldev_init(dev_t *devp)
5516 {
5517 minor_t minor;
5518 zfs_soft_state_t *zs;
5519
5520 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5521 ASSERT(getminor(*devp) == 0);
5522
5523 minor = zfsdev_minor_alloc();
5524 if (minor == 0)
5525 return (SET_ERROR(ENXIO));
5526
5527 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5528 return (SET_ERROR(EAGAIN));
5529
5530 *devp = makedevice(getemajor(*devp), minor);
5531
5532 zs = ddi_get_soft_state(zfsdev_state, minor);
5533 zs->zss_type = ZSST_CTLDEV;
5534 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5535
5536 return (0);
5537 }
5538
5539 static void
5540 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5541 {
5542 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5543
5544 zfs_onexit_destroy(zo);
5545 ddi_soft_state_free(zfsdev_state, minor);
5546 }
5547
5548 void *
5549 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5550 {
5551 zfs_soft_state_t *zp;
5552
5553 zp = ddi_get_soft_state(zfsdev_state, minor);
5554 if (zp == NULL || zp->zss_type != which)
5555 return (NULL);
5556
5557 return (zp->zss_data);
5558 }
5559
5560 static int
5561 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5562 {
5563 int error = 0;
5564
5565 if (getminor(*devp) != 0)
5566 return (zvol_open(devp, flag, otyp, cr));
5567
5568 /* This is the control device. Allocate a new minor if requested. */
5569 if (flag & FEXCL) {
5570 mutex_enter(&zfsdev_state_lock);
5571 error = zfs_ctldev_init(devp);
5572 mutex_exit(&zfsdev_state_lock);
5573 }
5574
5575 return (error);
5576 }
5577
5578 static int
5579 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5580 {
5581 zfs_onexit_t *zo;
5582 minor_t minor = getminor(dev);
5583
5584 if (minor == 0)
5585 return (0);
5586
5587 mutex_enter(&zfsdev_state_lock);
5588 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5589 if (zo == NULL) {
5590 mutex_exit(&zfsdev_state_lock);
5591 return (zvol_close(dev, flag, otyp, cr));
5592 }
5593 zfs_ctldev_destroy(zo, minor);
5594 mutex_exit(&zfsdev_state_lock);
5595
5596 return (0);
5597 }
5598
5599 static int
5600 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5601 {
5602 zfs_cmd_t *zc;
5603 uint_t vecnum;
5604 int error, rc, len;
5605 minor_t minor = getminor(dev);
5606 const zfs_ioc_vec_t *vec;
5607 char *saved_poolname = NULL;
5608 nvlist_t *innvl = NULL;
5609
5610 if (minor != 0 &&
5611 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5612 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5613
5614 vecnum = cmd - ZFS_IOC_FIRST;
5615 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5616
5617 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5618 return (SET_ERROR(EINVAL));
5619 vec = &zfs_ioc_vec[vecnum];
5620
5621 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5622
5623 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5624 if (error != 0) {
5625 error = SET_ERROR(EFAULT);
5626 goto out;
5627 }
5628
5629 zc->zc_iflags = flag & FKIOCTL;
5630 if (zc->zc_nvlist_src_size != 0) {
5631 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5632 zc->zc_iflags, &innvl);
5633 if (error != 0)
5634 goto out;
5635 }
5636
5637 /*
5638 * Ensure that all pool/dataset names are valid before we pass down to
5639 * the lower layers.
5640 */
5641 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5642 switch (vec->zvec_namecheck) {
5643 case POOL_NAME:
5644 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5645 error = SET_ERROR(EINVAL);
5646 else
5647 error = pool_status_check(zc->zc_name,
5648 vec->zvec_namecheck, vec->zvec_pool_check);
5649 break;
5650
5651 case DATASET_NAME:
5652 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5653 error = SET_ERROR(EINVAL);
5654 else
5655 error = pool_status_check(zc->zc_name,
5656 vec->zvec_namecheck, vec->zvec_pool_check);
5657 break;
5658
5659 case NO_NAME:
5660 break;
5661 }
5662
5663
5664 if (error == 0 && !(flag & FKIOCTL))
5665 error = vec->zvec_secpolicy(zc, innvl, cr);
5666
5667 if (error != 0)
5668 goto out;
5669
5670 /* legacy ioctls can modify zc_name */
5671 len = strcspn(zc->zc_name, "/@") + 1;
5672 saved_poolname = kmem_alloc(len, KM_SLEEP);
5673 (void) strlcpy(saved_poolname, zc->zc_name, len);
5674
5675 if (vec->zvec_func != NULL) {
5676 nvlist_t *outnvl;
5677 int puterror = 0;
5678 spa_t *spa;
5679 nvlist_t *lognv = NULL;
5680
5681 ASSERT(vec->zvec_legacy_func == NULL);
5682
5683 /*
5684 * Add the innvl to the lognv before calling the func,
5685 * in case the func changes the innvl.
5686 */
5687 if (vec->zvec_allow_log) {
5688 lognv = fnvlist_alloc();
5689 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
5690 vec->zvec_name);
5691 if (!nvlist_empty(innvl)) {
5692 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
5693 innvl);
5694 }
5695 }
5696
5697 outnvl = fnvlist_alloc();
5698 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
5699
5700 if (error == 0 && vec->zvec_allow_log &&
5701 spa_open(zc->zc_name, &spa, FTAG) == 0) {
5702 if (!nvlist_empty(outnvl)) {
5703 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
5704 outnvl);
5705 }
5706 (void) spa_history_log_nvl(spa, lognv);
5707 spa_close(spa, FTAG);
5708 }
5709 fnvlist_free(lognv);
5710
5711 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
5712 int smusherror = 0;
5713 if (vec->zvec_smush_outnvlist) {
5714 smusherror = nvlist_smush(outnvl,
5715 zc->zc_nvlist_dst_size);
5716 }
5717 if (smusherror == 0)
5718 puterror = put_nvlist(zc, outnvl);
5719 }
5720
5721 if (puterror != 0)
5722 error = puterror;
5723
5724 nvlist_free(outnvl);
5725 } else {
5726 error = vec->zvec_legacy_func(zc);
5727 }
5728
5729 out:
5730 nvlist_free(innvl);
5731 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5732 if (error == 0 && rc != 0)
5733 error = SET_ERROR(EFAULT);
5734 if (error == 0 && vec->zvec_allow_log) {
5735 char *s = tsd_get(zfs_allow_log_key);
5736 if (s != NULL)
5737 strfree(s);
5738 (void) tsd_set(zfs_allow_log_key, saved_poolname);
5739 } else {
5740 if (saved_poolname != NULL)
5741 strfree(saved_poolname);
5742 }
5743
5744 kmem_free(zc, sizeof (zfs_cmd_t));
5745 return (error);
5746 }
5747
5748 static int
5749 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5750 {
5751 if (cmd != DDI_ATTACH)
5752 return (DDI_FAILURE);
5753
5754 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5755 DDI_PSEUDO, 0) == DDI_FAILURE)
5756 return (DDI_FAILURE);
5757
5758 zfs_dip = dip;
5759
5760 ddi_report_dev(dip);
5761
5762 return (DDI_SUCCESS);
5763 }
5764
5765 static int
5766 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5767 {
5768 if (spa_busy() || zfs_busy() || zvol_busy())
5769 return (DDI_FAILURE);
5770
5771 if (cmd != DDI_DETACH)
5772 return (DDI_FAILURE);
5773
5774 zfs_dip = NULL;
5775
5776 ddi_prop_remove_all(dip);
5777 ddi_remove_minor_node(dip, NULL);
5778
5779 return (DDI_SUCCESS);
5780 }
5781
5782 /*ARGSUSED*/
5783 static int
5784 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5785 {
5786 switch (infocmd) {
5787 case DDI_INFO_DEVT2DEVINFO:
5788 *result = zfs_dip;
5789 return (DDI_SUCCESS);
5790
5791 case DDI_INFO_DEVT2INSTANCE:
5792 *result = (void *)0;
5793 return (DDI_SUCCESS);
5794 }
5795
5796 return (DDI_FAILURE);
5797 }
5798
5799 /*
5800 * OK, so this is a little weird.
5801 *
5802 * /dev/zfs is the control node, i.e. minor 0.
5803 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5804 *
5805 * /dev/zfs has basically nothing to do except serve up ioctls,
5806 * so most of the standard driver entry points are in zvol.c.
5807 */
5808 static struct cb_ops zfs_cb_ops = {
5809 zfsdev_open, /* open */
5810 zfsdev_close, /* close */
5811 zvol_strategy, /* strategy */
5812 nodev, /* print */
5813 zvol_dump, /* dump */
5814 zvol_read, /* read */
5815 zvol_write, /* write */
5816 zfsdev_ioctl, /* ioctl */
5817 nodev, /* devmap */
5818 nodev, /* mmap */
5819 nodev, /* segmap */
5820 nochpoll, /* poll */
5821 ddi_prop_op, /* prop_op */
5822 NULL, /* streamtab */
5823 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
5824 CB_REV, /* version */
5825 nodev, /* async read */
5826 nodev, /* async write */
5827 };
5828
5829 static struct dev_ops zfs_dev_ops = {
5830 DEVO_REV, /* version */
5831 0, /* refcnt */
5832 zfs_info, /* info */
5833 nulldev, /* identify */
5834 nulldev, /* probe */
5835 zfs_attach, /* attach */
5836 zfs_detach, /* detach */
5837 nodev, /* reset */
5838 &zfs_cb_ops, /* driver operations */
5839 NULL, /* no bus operations */
5840 NULL, /* power */
5841 ddi_quiesce_not_needed, /* quiesce */
5842 };
5843
5844 static struct modldrv zfs_modldrv = {
5845 &mod_driverops,
5846 "ZFS storage pool",
5847 &zfs_dev_ops
5848 };
5849
5850 static struct modlinkage modlinkage = {
5851 MODREV_1,
5852 (void *)&zfs_modlfs,
5853 (void *)&zfs_modldrv,
5854 NULL
5855 };
5856
5857 static void
5858 zfs_allow_log_destroy(void *arg)
5859 {
5860 char *poolname = arg;
5861 strfree(poolname);
5862 }
5863
5864 int
5865 _init(void)
5866 {
5867 int error;
5868
5869 spa_init(FREAD | FWRITE);
5870 zfs_init();
5871 zvol_init();
5872 zfs_ioctl_init();
5873
5874 if ((error = mod_install(&modlinkage)) != 0) {
5875 zvol_fini();
5876 zfs_fini();
5877 spa_fini();
5878 return (error);
5879 }
5880
5881 tsd_create(&zfs_fsyncer_key, NULL);
5882 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
5883 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
5884
5885 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
5886 ASSERT(error == 0);
5887 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
5888
5889 return (0);
5890 }
5891
5892 int
5893 _fini(void)
5894 {
5895 int error;
5896
5897 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
5898 return (SET_ERROR(EBUSY));
5899
5900 if ((error = mod_remove(&modlinkage)) != 0)
5901 return (error);
5902
5903 zvol_fini();
5904 zfs_fini();
5905 spa_fini();
5906 if (zfs_nfsshare_inited)
5907 (void) ddi_modclose(nfs_mod);
5908 if (zfs_smbshare_inited)
5909 (void) ddi_modclose(smbsrv_mod);
5910 if (zfs_nfsshare_inited || zfs_smbshare_inited)
5911 (void) ddi_modclose(sharefs_mod);
5912
5913 tsd_destroy(&zfs_fsyncer_key);
5914 ldi_ident_release(zfs_li);
5915 zfs_li = NULL;
5916 mutex_destroy(&zfs_share_lock);
5917
5918 return (error);
5919 }
5920
5921 int
5922 _info(struct modinfo *modinfop)
5923 {
5924 return (mod_info(&modlinkage, modinfop));
5925 }