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