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 2012 Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
27 * Copyright (c) 2012 by Delphix. All rights reserved.
28 */
29
30 /*
31 * ZFS ioctls.
32 *
33 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
34 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
35 *
36 * There are two ways that we handle ioctls: the legacy way where almost
37 * all of the logic is in the ioctl callback, and the new way where most
38 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
39 *
40 * Non-legacy ioctls should be registered by calling
41 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
42 * from userland by lzc_ioctl().
43 *
44 * The registration arguments are as follows:
45 *
46 * const char *name
47 * The name of the ioctl. This is used for history logging. If the
48 * ioctl returns successfully (the callback returns 0), and allow_log
49 * is true, then a history log entry will be recorded with the input &
50 * output nvlists. The log entry can be printed with "zpool history -i".
51 *
52 * zfs_ioc_t ioc
53 * The ioctl request number, which userland will pass to ioctl(2).
54 * The ioctl numbers can change from release to release, because
55 * the caller (libzfs) must be matched to the kernel.
56 *
57 * zfs_secpolicy_func_t *secpolicy
58 * This function will be called before the zfs_ioc_func_t, to
59 * determine if this operation is permitted. It should return EPERM
60 * on failure, and 0 on success. Checks include determining if the
61 * dataset is visible in this zone, and if the user has either all
62 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
63 * to do this operation on this dataset with "zfs allow".
64 *
65 * zfs_ioc_namecheck_t namecheck
66 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
67 * name, a dataset name, or nothing. If the name is not well-formed,
68 * the ioctl will fail and the callback will not be called.
69 * Therefore, the callback can assume that the name is well-formed
70 * (e.g. is null-terminated, doesn't have more than one '@' character,
71 * doesn't have invalid characters).
72 *
73 * zfs_ioc_poolcheck_t pool_check
74 * This specifies requirements on the pool state. If the pool does
75 * not meet them (is suspended or is readonly), the ioctl will fail
76 * and the callback will not be called. If any checks are specified
77 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
78 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
79 * POOL_CHECK_READONLY).
80 *
81 * boolean_t smush_outnvlist
82 * If smush_outnvlist is true, then the output is presumed to be a
83 * list of errors, and it will be "smushed" down to fit into the
84 * caller's buffer, by removing some entries and replacing them with a
85 * single "N_MORE_ERRORS" entry indicating how many were removed. See
86 * nvlist_smush() for details. If smush_outnvlist is false, and the
87 * outnvlist does not fit into the userland-provided buffer, then the
88 * ioctl will fail with ENOMEM.
89 *
90 * zfs_ioc_func_t *func
91 * The callback function that will perform the operation.
92 *
93 * The callback should return 0 on success, or an error number on
94 * failure. If the function fails, the userland ioctl will return -1,
95 * and errno will be set to the callback's return value. The callback
96 * will be called with the following arguments:
97 *
98 * const char *name
99 * The name of the pool or dataset to operate on, from
100 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
101 * expected type (pool, dataset, or none).
102 *
103 * nvlist_t *innvl
104 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
105 * NULL if no input nvlist was provided. Changes to this nvlist are
106 * ignored. If the input nvlist could not be deserialized, the
107 * ioctl will fail and the callback will not be called.
108 *
109 * nvlist_t *outnvl
110 * The output nvlist, initially empty. The callback can fill it in,
111 * and it will be returned to userland by serializing it into
112 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
113 * fails (e.g. because the caller didn't supply a large enough
114 * buffer), then the overall ioctl will fail. See the
115 * 'smush_nvlist' argument above for additional behaviors.
116 *
117 * There are two typical uses of the output nvlist:
118 * - To return state, e.g. property values. In this case,
119 * smush_outnvlist should be false. If the buffer was not large
120 * enough, the caller will reallocate a larger buffer and try
121 * the ioctl again.
122 *
123 * - To return multiple errors from an ioctl which makes on-disk
124 * changes. In this case, smush_outnvlist should be true.
125 * Ioctls which make on-disk modifications should generally not
126 * use the outnvl if they succeed, because the caller can not
127 * distinguish between the operation failing, and
128 * deserialization failing.
129 */
130
131 #include <sys/types.h>
132 #include <sys/param.h>
133 #include <sys/errno.h>
134 #include <sys/uio.h>
135 #include <sys/buf.h>
136 #include <sys/modctl.h>
137 #include <sys/open.h>
138 #include <sys/file.h>
139 #include <sys/kmem.h>
140 #include <sys/conf.h>
141 #include <sys/cmn_err.h>
142 #include <sys/stat.h>
143 #include <sys/zfs_ioctl.h>
144 #include <sys/zfs_vfsops.h>
145 #include <sys/zfs_znode.h>
146 #include <sys/zap.h>
147 #include <sys/spa.h>
148 #include <sys/spa_impl.h>
149 #include <sys/vdev.h>
150 #include <sys/priv_impl.h>
151 #include <sys/dmu.h>
152 #include <sys/dsl_dir.h>
153 #include <sys/dsl_dataset.h>
154 #include <sys/dsl_prop.h>
155 #include <sys/dsl_deleg.h>
156 #include <sys/dmu_objset.h>
157 #include <sys/dmu_impl.h>
158 #include <sys/ddi.h>
159 #include <sys/sunddi.h>
160 #include <sys/sunldi.h>
161 #include <sys/policy.h>
162 #include <sys/zone.h>
163 #include <sys/nvpair.h>
164 #include <sys/pathname.h>
165 #include <sys/mount.h>
166 #include <sys/sdt.h>
167 #include <sys/fs/zfs.h>
168 #include <sys/zfs_ctldir.h>
169 #include <sys/zfs_dir.h>
170 #include <sys/zfs_onexit.h>
171 #include <sys/zvol.h>
172 #include <sys/dsl_scan.h>
173 #include <sharefs/share.h>
174 #include <sys/dmu_objset.h>
175
176 #include "zfs_namecheck.h"
177 #include "zfs_prop.h"
178 #include "zfs_deleg.h"
179 #include "zfs_comutil.h"
180
181 extern struct modlfs zfs_modlfs;
182
183 extern void zfs_init(void);
184 extern void zfs_fini(void);
185
186 ldi_ident_t zfs_li = NULL;
187 dev_info_t *zfs_dip;
188
189 uint_t zfs_fsyncer_key;
190 extern uint_t rrw_tsd_key;
191 static uint_t zfs_allow_log_key;
192
193 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
194 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
195 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
196
197 typedef enum {
198 NO_NAME,
199 POOL_NAME,
200 DATASET_NAME
201 } zfs_ioc_namecheck_t;
202
203 typedef enum {
204 POOL_CHECK_NONE = 1 << 0,
205 POOL_CHECK_SUSPENDED = 1 << 1,
206 POOL_CHECK_READONLY = 1 << 2,
207 } zfs_ioc_poolcheck_t;
208
209 typedef struct zfs_ioc_vec {
210 zfs_ioc_legacy_func_t *zvec_legacy_func;
211 zfs_ioc_func_t *zvec_func;
212 zfs_secpolicy_func_t *zvec_secpolicy;
213 zfs_ioc_namecheck_t zvec_namecheck;
214 boolean_t zvec_allow_log;
215 zfs_ioc_poolcheck_t zvec_pool_check;
216 boolean_t zvec_smush_outnvlist;
217 const char *zvec_name;
218 } zfs_ioc_vec_t;
219
220 /* This array is indexed by zfs_userquota_prop_t */
221 static const char *userquota_perms[] = {
222 ZFS_DELEG_PERM_USERUSED,
223 ZFS_DELEG_PERM_USERQUOTA,
224 ZFS_DELEG_PERM_GROUPUSED,
225 ZFS_DELEG_PERM_GROUPQUOTA,
226 };
227
228 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
229 static int zfs_check_settable(const char *name, nvpair_t *property,
230 cred_t *cr);
231 static int zfs_check_clearable(char *dataset, nvlist_t *props,
232 nvlist_t **errors);
233 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
234 boolean_t *);
235 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
236 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
237
238 static int
239 zfs_is_wormed(const char *name)
240 {
241 char worminfo[13] = {0};
242 char cname[MAXNAMELEN];
243 char *end;
244
245 (void) strlcpy(cname, name, MAXNAMELEN);
246 end = strchr(cname, '@');
247 if (end)
248 *end = 0;
249
250 if (dsl_prop_get(cname, "nms:worm", 1, 12, &worminfo, NULL) == 0 &&
251 worminfo[0] && strcmp(worminfo, "0") != 0 &&
252 strcmp(worminfo, "off") != 0 && strcmp(worminfo, "-") != 0) {
253 return (1);
254 }
255 return (0);
256 }
257
258 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
259 void
260 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
261 {
262 const char *newfile;
263 char buf[512];
264 va_list adx;
265
266 /*
267 * Get rid of annoying "../common/" prefix to filename.
268 */
269 newfile = strrchr(file, '/');
270 if (newfile != NULL) {
271 newfile = newfile + 1; /* Get rid of leading / */
272 } else {
273 newfile = file;
274 }
275
276 va_start(adx, fmt);
277 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
278 va_end(adx);
279
280 /*
281 * To get this data, use the zfs-dprintf probe as so:
282 * dtrace -q -n 'zfs-dprintf \
283 * /stringof(arg0) == "dbuf.c"/ \
284 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
285 * arg0 = file name
286 * arg1 = function name
287 * arg2 = line number
288 * arg3 = message
289 */
290 DTRACE_PROBE4(zfs__dprintf,
291 char *, newfile, char *, func, int, line, char *, buf);
292 }
293
294 static void
295 history_str_free(char *buf)
296 {
297 kmem_free(buf, HIS_MAX_RECORD_LEN);
298 }
299
300 static char *
301 history_str_get(zfs_cmd_t *zc)
302 {
303 char *buf;
304
305 if (zc->zc_history == NULL)
306 return (NULL);
307
308 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
309 if (copyinstr((void *)(uintptr_t)zc->zc_history,
310 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
311 history_str_free(buf);
312 return (NULL);
313 }
314
315 buf[HIS_MAX_RECORD_LEN -1] = '\0';
316
317 return (buf);
318 }
319
320 /*
321 * Check to see if the named dataset is currently defined as bootable
322 */
323 static boolean_t
324 zfs_is_bootfs(const char *name)
325 {
326 objset_t *os;
327
328 if (dmu_objset_hold(name, FTAG, &os) == 0) {
329 boolean_t ret;
330 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
331 dmu_objset_rele(os, FTAG);
332 return (ret);
333 }
334 return (B_FALSE);
335 }
336
337 /*
338 * zfs_earlier_version
339 *
340 * Return non-zero if the spa version is less than requested version.
341 */
342 static int
343 zfs_earlier_version(const char *name, int version)
344 {
345 spa_t *spa;
346
347 if (spa_open(name, &spa, FTAG) == 0) {
348 if (spa_version(spa) < version) {
349 spa_close(spa, FTAG);
350 return (1);
351 }
352 spa_close(spa, FTAG);
353 }
354 return (0);
355 }
356
357 /*
358 * zpl_earlier_version
359 *
360 * Return TRUE if the ZPL version is less than requested version.
361 */
362 static boolean_t
363 zpl_earlier_version(const char *name, int version)
364 {
365 objset_t *os;
366 boolean_t rc = B_TRUE;
367
368 if (dmu_objset_hold(name, FTAG, &os) == 0) {
369 uint64_t zplversion;
370
371 if (dmu_objset_type(os) != DMU_OST_ZFS) {
372 dmu_objset_rele(os, FTAG);
373 return (B_TRUE);
374 }
375 /* XXX reading from non-owned objset */
376 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
377 rc = zplversion < version;
378 dmu_objset_rele(os, FTAG);
379 }
380 return (rc);
381 }
382
383 static void
384 zfs_log_history(zfs_cmd_t *zc)
385 {
386 spa_t *spa;
387 char *buf;
388
389 if ((buf = history_str_get(zc)) == NULL)
390 return;
391
392 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
393 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
394 (void) spa_history_log(spa, buf);
395 spa_close(spa, FTAG);
396 }
397 history_str_free(buf);
398 }
399
400 /*
401 * Policy for top-level read operations (list pools). Requires no privileges,
402 * and can be used in the local zone, as there is no associated dataset.
403 */
404 /* ARGSUSED */
405 static int
406 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
407 {
408 return (0);
409 }
410
411 /*
412 * Policy for dataset read operations (list children, get statistics). Requires
413 * no privileges, but must be visible in the local zone.
414 */
415 /* ARGSUSED */
416 static int
417 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
418 {
419 if (INGLOBALZONE(curproc) ||
420 zone_dataset_visible(zc->zc_name, NULL))
421 return (0);
422
423 return (ENOENT);
424 }
425
426 static int
427 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
428 {
429 int writable = 1;
430
431 /*
432 * The dataset must be visible by this zone -- check this first
433 * so they don't see EPERM on something they shouldn't know about.
434 */
435 if (!INGLOBALZONE(curproc) &&
436 !zone_dataset_visible(dataset, &writable))
437 return (ENOENT);
438
439 if (INGLOBALZONE(curproc)) {
440 /*
441 * If the fs is zoned, only root can access it from the
442 * global zone.
443 */
444 if (secpolicy_zfs(cr) && zoned)
445 return (EPERM);
446 } else {
447 /*
448 * If we are in a local zone, the 'zoned' property must be set.
449 */
450 if (!zoned)
451 return (EPERM);
452
453 /* must be writable by this zone */
454 if (!writable)
455 return (EPERM);
456 }
457 return (0);
458 }
459
460 static int
461 zfs_dozonecheck(const char *dataset, cred_t *cr)
462 {
463 uint64_t zoned;
464
465 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
466 return (ENOENT);
467
468 return (zfs_dozonecheck_impl(dataset, zoned, cr));
469 }
470
471 static int
472 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
473 {
474 uint64_t zoned;
475
476 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
477 if (dsl_prop_get_ds(ds, "zoned", 8, 1, &zoned, NULL)) {
478 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
479 return (ENOENT);
480 }
481 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
482
483 return (zfs_dozonecheck_impl(dataset, zoned, cr));
484 }
485
486 static int
487 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
488 {
489 int error;
490 dsl_dataset_t *ds;
491
492 error = dsl_dataset_hold(name, FTAG, &ds);
493 if (error != 0)
494 return (error);
495
496 error = zfs_dozonecheck_ds(name, ds, cr);
497 if (error == 0) {
498 error = secpolicy_zfs(cr);
499 if (error)
500 error = dsl_deleg_access_impl(ds, perm, cr);
501 }
502
503 dsl_dataset_rele(ds, FTAG);
504 return (error);
505 }
506
507 static int
508 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
509 const char *perm, cred_t *cr)
510 {
511 int error;
512
513 error = zfs_dozonecheck_ds(name, ds, cr);
514 if (error == 0) {
515 error = secpolicy_zfs(cr);
516 if (error)
517 error = dsl_deleg_access_impl(ds, perm, cr);
518 }
519 return (error);
520 }
521
522 /*
523 * Policy for setting the security label property.
524 *
525 * Returns 0 for success, non-zero for access and other errors.
526 */
527 static int
528 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
529 {
530 char ds_hexsl[MAXNAMELEN];
531 bslabel_t ds_sl, new_sl;
532 boolean_t new_default = FALSE;
533 uint64_t zoned;
534 int needed_priv = -1;
535 int error;
536
537 /* First get the existing dataset label. */
538 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
539 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
540 if (error)
541 return (EPERM);
542
543 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
544 new_default = TRUE;
545
546 /* The label must be translatable */
547 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
548 return (EINVAL);
549
550 /*
551 * In a non-global zone, disallow attempts to set a label that
552 * doesn't match that of the zone; otherwise no other checks
553 * are needed.
554 */
555 if (!INGLOBALZONE(curproc)) {
556 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
557 return (EPERM);
558 return (0);
559 }
560
561 /*
562 * For global-zone datasets (i.e., those whose zoned property is
563 * "off", verify that the specified new label is valid for the
564 * global zone.
565 */
566 if (dsl_prop_get_integer(name,
567 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
568 return (EPERM);
569 if (!zoned) {
570 if (zfs_check_global_label(name, strval) != 0)
571 return (EPERM);
572 }
573
574 /*
575 * If the existing dataset label is nondefault, check if the
576 * dataset is mounted (label cannot be changed while mounted).
577 * Get the zfsvfs; if there isn't one, then the dataset isn't
578 * mounted (or isn't a dataset, doesn't exist, ...).
579 */
580 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
581 objset_t *os;
582 static char *setsl_tag = "setsl_tag";
583
584 /*
585 * Try to own the dataset; abort if there is any error,
586 * (e.g., already mounted, in use, or other error).
587 */
588 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
589 setsl_tag, &os);
590 if (error)
591 return (EPERM);
592
593 dmu_objset_disown(os, setsl_tag);
594
595 if (new_default) {
596 needed_priv = PRIV_FILE_DOWNGRADE_SL;
597 goto out_check;
598 }
599
600 if (hexstr_to_label(strval, &new_sl) != 0)
601 return (EPERM);
602
603 if (blstrictdom(&ds_sl, &new_sl))
604 needed_priv = PRIV_FILE_DOWNGRADE_SL;
605 else if (blstrictdom(&new_sl, &ds_sl))
606 needed_priv = PRIV_FILE_UPGRADE_SL;
607 } else {
608 /* dataset currently has a default label */
609 if (!new_default)
610 needed_priv = PRIV_FILE_UPGRADE_SL;
611 }
612
613 out_check:
614 if (needed_priv != -1)
615 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
616 return (0);
617 }
618
619 static int
620 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
621 cred_t *cr)
622 {
623 char *strval;
624
625 /*
626 * Check permissions for special properties.
627 */
628 switch (prop) {
629 case ZFS_PROP_ZONED:
630 /*
631 * Disallow setting of 'zoned' from within a local zone.
632 */
633 if (!INGLOBALZONE(curproc))
634 return (EPERM);
635 break;
636
637 case ZFS_PROP_QUOTA:
638 if (!INGLOBALZONE(curproc)) {
639 uint64_t zoned;
640 char setpoint[MAXNAMELEN];
641 /*
642 * Unprivileged users are allowed to modify the
643 * quota on things *under* (ie. contained by)
644 * the thing they own.
645 */
646 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
647 setpoint))
648 return (EPERM);
649 if (!zoned || strlen(dsname) <= strlen(setpoint))
650 return (EPERM);
651 }
652 break;
653
654 case ZFS_PROP_MLSLABEL:
655 if (!is_system_labeled())
656 return (EPERM);
657
658 if (nvpair_value_string(propval, &strval) == 0) {
659 int err;
660
661 err = zfs_set_slabel_policy(dsname, strval, CRED());
662 if (err != 0)
663 return (err);
664 }
665 break;
666 }
667
668 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
669 }
670
671 /* ARGSUSED */
672 static int
673 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
674 {
675 int error;
676
677 error = zfs_dozonecheck(zc->zc_name, cr);
678 if (error)
679 return (error);
680
681 /*
682 * permission to set permissions will be evaluated later in
683 * dsl_deleg_can_allow()
684 */
685 return (0);
686 }
687
688 /* ARGSUSED */
689 static int
690 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
691 {
692 return (zfs_secpolicy_write_perms(zc->zc_name,
693 ZFS_DELEG_PERM_ROLLBACK, cr));
694 }
695
696 /* ARGSUSED */
697 static int
698 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
699 {
700 spa_t *spa;
701 dsl_pool_t *dp;
702 dsl_dataset_t *ds;
703 char *cp;
704 int error;
705
706 /*
707 * Generate the current snapshot name from the given objsetid, then
708 * use that name for the secpolicy/zone checks.
709 */
710 cp = strchr(zc->zc_name, '@');
711 if (cp == NULL)
712 return (EINVAL);
713 error = spa_open(zc->zc_name, &spa, FTAG);
714 if (error)
715 return (error);
716
717 dp = spa_get_dsl(spa);
718 rw_enter(&dp->dp_config_rwlock, RW_READER);
719 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
720 rw_exit(&dp->dp_config_rwlock);
721 spa_close(spa, FTAG);
722 if (error)
723 return (error);
724
725 dsl_dataset_name(ds, zc->zc_name);
726
727 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
728 ZFS_DELEG_PERM_SEND, cr);
729 dsl_dataset_rele(ds, FTAG);
730
731 return (error);
732 }
733
734 /* ARGSUSED */
735 static int
736 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
737 {
738 return (zfs_secpolicy_write_perms(zc->zc_name,
739 ZFS_DELEG_PERM_SEND, cr));
740 }
741
742 /* ARGSUSED */
743 static int
744 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
745 {
746 vnode_t *vp;
747 int error;
748
749 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
750 NO_FOLLOW, NULL, &vp)) != 0)
751 return (error);
752
753 /* Now make sure mntpnt and dataset are ZFS */
754
755 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
756 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
757 zc->zc_name) != 0)) {
758 VN_RELE(vp);
759 return (EPERM);
760 }
761
762 VN_RELE(vp);
763 return (dsl_deleg_access(zc->zc_name,
764 ZFS_DELEG_PERM_SHARE, cr));
765 }
766
767 int
768 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
769 {
770 if (!INGLOBALZONE(curproc))
771 return (EPERM);
772
773 if (secpolicy_nfs(cr) == 0) {
774 return (0);
775 } else {
776 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
777 }
778 }
779
780 int
781 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
782 {
783 if (!INGLOBALZONE(curproc))
784 return (EPERM);
785
786 if (secpolicy_smb(cr) == 0) {
787 return (0);
788 } else {
789 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
790 }
791 }
792
793 static int
794 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
795 {
796 char *cp;
797
798 /*
799 * Remove the @bla or /bla from the end of the name to get the parent.
800 */
801 (void) strncpy(parent, datasetname, parentsize);
802 cp = strrchr(parent, '@');
803 if (cp != NULL) {
804 cp[0] = '\0';
805 } else {
806 cp = strrchr(parent, '/');
807 if (cp == NULL)
808 return (ENOENT);
809 cp[0] = '\0';
810 }
811
812 return (0);
813 }
814
815 int
816 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
817 {
818 int error;
819
820 if ((error = zfs_secpolicy_write_perms(name,
821 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
822 return (error);
823
824 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
825 }
826
827 /* ARGSUSED */
828 static int
829 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
830 {
831 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
832 }
833
834 /*
835 * Destroying snapshots with delegated permissions requires
836 * descendant mount and destroy permissions.
837 */
838 /* ARGSUSED */
839 static int
840 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
841 {
842 nvlist_t *snaps;
843 nvpair_t *pair, *nextpair;
844 int error = 0;
845
846 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
847 return (EINVAL);
848 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
849 pair = nextpair) {
850 dsl_dataset_t *ds;
851
852 nextpair = nvlist_next_nvpair(snaps, pair);
853 error = dsl_dataset_hold(nvpair_name(pair), FTAG, &ds);
854 if (error == 0) {
855 dsl_dataset_rele(ds, FTAG);
856 } else if (error == ENOENT) {
857 /*
858 * Ignore any snapshots that don't exist (we consider
859 * them "already destroyed"). Remove the name from the
860 * nvl here in case the snapshot is created between
861 * now and when we try to destroy it (in which case
862 * we don't want to destroy it since we haven't
863 * checked for permission).
864 */
865 fnvlist_remove_nvpair(snaps, pair);
866 error = 0;
867 continue;
868 } else {
869 break;
870 }
871 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr);
872 if (error != 0)
873 break;
874 }
875
876 return (error);
877 }
878
879 int
880 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
881 {
882 char parentname[MAXNAMELEN];
883 int error;
884
885 if ((error = zfs_secpolicy_write_perms(from,
886 ZFS_DELEG_PERM_RENAME, cr)) != 0)
887 return (error);
888
889 if ((error = zfs_secpolicy_write_perms(from,
890 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
891 return (error);
892
893 if ((error = zfs_get_parent(to, parentname,
894 sizeof (parentname))) != 0)
895 return (error);
896
897 if ((error = zfs_secpolicy_write_perms(parentname,
898 ZFS_DELEG_PERM_CREATE, cr)) != 0)
899 return (error);
900
901 if ((error = zfs_secpolicy_write_perms(parentname,
902 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
903 return (error);
904
905 return (error);
906 }
907
908 /* ARGSUSED */
909 static int
910 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
911 {
912 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
913 }
914
915 /* ARGSUSED */
916 static int
917 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
918 {
919 char parentname[MAXNAMELEN];
920 objset_t *clone;
921 int error;
922
923 error = zfs_secpolicy_write_perms(zc->zc_name,
924 ZFS_DELEG_PERM_PROMOTE, cr);
925 if (error)
926 return (error);
927
928 error = dmu_objset_hold(zc->zc_name, FTAG, &clone);
929
930 if (error == 0) {
931 dsl_dataset_t *pclone = NULL;
932 dsl_dir_t *dd;
933 dd = clone->os_dsl_dataset->ds_dir;
934
935 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
936 error = dsl_dataset_hold_obj(dd->dd_pool,
937 dd->dd_phys->dd_origin_obj, FTAG, &pclone);
938 rw_exit(&dd->dd_pool->dp_config_rwlock);
939 if (error) {
940 dmu_objset_rele(clone, FTAG);
941 return (error);
942 }
943
944 error = zfs_secpolicy_write_perms(zc->zc_name,
945 ZFS_DELEG_PERM_MOUNT, cr);
946
947 dsl_dataset_name(pclone, parentname);
948 dmu_objset_rele(clone, FTAG);
949 dsl_dataset_rele(pclone, FTAG);
950 if (error == 0)
951 error = zfs_secpolicy_write_perms(parentname,
952 ZFS_DELEG_PERM_PROMOTE, cr);
953 }
954 return (error);
955 }
956
957 /* ARGSUSED */
958 static int
959 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
960 {
961 int error;
962
963 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
964 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
965 return (error);
966
967 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
968 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
969 return (error);
970
971 return (zfs_secpolicy_write_perms(zc->zc_name,
972 ZFS_DELEG_PERM_CREATE, cr));
973 }
974
975 int
976 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
977 {
978 return (zfs_secpolicy_write_perms(name,
979 ZFS_DELEG_PERM_SNAPSHOT, cr));
980 }
981
982 /*
983 * Check for permission to create each snapshot in the nvlist.
984 */
985 /* ARGSUSED */
986 static int
987 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
988 {
989 nvlist_t *snaps;
990 int error;
991 nvpair_t *pair;
992
993 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
994 return (EINVAL);
995 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
996 pair = nvlist_next_nvpair(snaps, pair)) {
997 char *name = nvpair_name(pair);
998 char *atp = strchr(name, '@');
999
1000 if (atp == NULL) {
1001 error = EINVAL;
1002 break;
1003 }
1004 *atp = '\0';
1005 error = zfs_secpolicy_snapshot_perms(name, cr);
1006 *atp = '@';
1007 if (error != 0)
1008 break;
1009 }
1010 return (error);
1011 }
1012
1013 /* ARGSUSED */
1014 static int
1015 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1016 {
1017 /*
1018 * Even root must have a proper TSD so that we know what pool
1019 * to log to.
1020 */
1021 if (tsd_get(zfs_allow_log_key) == NULL)
1022 return (EPERM);
1023 return (0);
1024 }
1025
1026 static int
1027 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1028 {
1029 char parentname[MAXNAMELEN];
1030 int error;
1031 char *origin;
1032
1033 if ((error = zfs_get_parent(zc->zc_name, parentname,
1034 sizeof (parentname))) != 0)
1035 return (error);
1036
1037 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1038 (error = zfs_secpolicy_write_perms(origin,
1039 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1040 return (error);
1041
1042 if ((error = zfs_secpolicy_write_perms(parentname,
1043 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1044 return (error);
1045
1046 return (zfs_secpolicy_write_perms(parentname,
1047 ZFS_DELEG_PERM_MOUNT, cr));
1048 }
1049
1050 /*
1051 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1052 * SYS_CONFIG privilege, which is not available in a local zone.
1053 */
1054 /* ARGSUSED */
1055 static int
1056 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1057 {
1058 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1059 return (EPERM);
1060
1061 return (0);
1062 }
1063
1064 /*
1065 * Policy for object to name lookups.
1066 */
1067 /* ARGSUSED */
1068 static int
1069 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1070 {
1071 int error;
1072
1073 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1074 return (0);
1075
1076 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1077 return (error);
1078 }
1079
1080 /*
1081 * Policy for fault injection. Requires all privileges.
1082 */
1083 /* ARGSUSED */
1084 static int
1085 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1086 {
1087 return (secpolicy_zinject(cr));
1088 }
1089
1090 /* ARGSUSED */
1091 static int
1092 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1093 {
1094 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1095
1096 if (prop == ZPROP_INVAL) {
1097 if (!zfs_prop_user(zc->zc_value))
1098 return (EINVAL);
1099 return (zfs_secpolicy_write_perms(zc->zc_name,
1100 ZFS_DELEG_PERM_USERPROP, cr));
1101 } else {
1102 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1103 NULL, cr));
1104 }
1105 }
1106
1107 static int
1108 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1109 {
1110 int err = zfs_secpolicy_read(zc, innvl, cr);
1111 if (err)
1112 return (err);
1113
1114 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1115 return (EINVAL);
1116
1117 if (zc->zc_value[0] == 0) {
1118 /*
1119 * They are asking about a posix uid/gid. If it's
1120 * themself, allow it.
1121 */
1122 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1123 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1124 if (zc->zc_guid == crgetuid(cr))
1125 return (0);
1126 } else {
1127 if (groupmember(zc->zc_guid, cr))
1128 return (0);
1129 }
1130 }
1131
1132 return (zfs_secpolicy_write_perms(zc->zc_name,
1133 userquota_perms[zc->zc_objset_type], cr));
1134 }
1135
1136 static int
1137 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1138 {
1139 int err = zfs_secpolicy_read(zc, innvl, cr);
1140 if (err)
1141 return (err);
1142
1143 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1144 return (EINVAL);
1145
1146 return (zfs_secpolicy_write_perms(zc->zc_name,
1147 userquota_perms[zc->zc_objset_type], cr));
1148 }
1149
1150 /* ARGSUSED */
1151 static int
1152 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1153 {
1154 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1155 NULL, cr));
1156 }
1157
1158 /* ARGSUSED */
1159 static int
1160 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1161 {
1162 return (zfs_secpolicy_write_perms(zc->zc_name,
1163 ZFS_DELEG_PERM_HOLD, cr));
1164 }
1165
1166 /* ARGSUSED */
1167 static int
1168 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1169 {
1170 return (zfs_secpolicy_write_perms(zc->zc_name,
1171 ZFS_DELEG_PERM_RELEASE, cr));
1172 }
1173
1174 /*
1175 * Policy for allowing temporary snapshots to be taken or released
1176 */
1177 static int
1178 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1179 {
1180 /*
1181 * A temporary snapshot is the same as a snapshot,
1182 * hold, destroy and release all rolled into one.
1183 * Delegated diff alone is sufficient that we allow this.
1184 */
1185 int error;
1186
1187 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1188 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1189 return (0);
1190
1191 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1192 if (!error)
1193 error = zfs_secpolicy_hold(zc, innvl, cr);
1194 if (!error)
1195 error = zfs_secpolicy_release(zc, innvl, cr);
1196 if (!error)
1197 error = zfs_secpolicy_destroy(zc, innvl, cr);
1198 return (error);
1199 }
1200
1201 /*
1202 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1203 */
1204 static int
1205 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1206 {
1207 char *packed;
1208 int error;
1209 nvlist_t *list = NULL;
1210
1211 /*
1212 * Read in and unpack the user-supplied nvlist.
1213 */
1214 if (size == 0)
1215 return (EINVAL);
1216
1217 packed = kmem_alloc(size, KM_SLEEP);
1218
1219 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1220 iflag)) != 0) {
1221 kmem_free(packed, size);
1222 return (error);
1223 }
1224
1225 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1226 kmem_free(packed, size);
1227 return (error);
1228 }
1229
1230 kmem_free(packed, size);
1231
1232 *nvp = list;
1233 return (0);
1234 }
1235
1236 /*
1237 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1238 * Entries will be removed from the end of the nvlist, and one int32 entry
1239 * named "N_MORE_ERRORS" will be added indicating how many entries were
1240 * removed.
1241 */
1242 static int
1243 nvlist_smush(nvlist_t *errors, size_t max)
1244 {
1245 size_t size;
1246
1247 size = fnvlist_size(errors);
1248
1249 if (size > max) {
1250 nvpair_t *more_errors;
1251 int n = 0;
1252
1253 if (max < 1024)
1254 return (ENOMEM);
1255
1256 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1257 more_errors = nvlist_prev_nvpair(errors, NULL);
1258
1259 do {
1260 nvpair_t *pair = nvlist_prev_nvpair(errors,
1261 more_errors);
1262 fnvlist_remove_nvpair(errors, pair);
1263 n++;
1264 size = fnvlist_size(errors);
1265 } while (size > max);
1266
1267 fnvlist_remove_nvpair(errors, more_errors);
1268 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1269 ASSERT3U(fnvlist_size(errors), <=, max);
1270 }
1271
1272 return (0);
1273 }
1274
1275 static int
1276 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1277 {
1278 char *packed = NULL;
1279 int error = 0;
1280 size_t size;
1281
1282 size = fnvlist_size(nvl);
1283
1284 if (size > zc->zc_nvlist_dst_size) {
1285 error = ENOMEM;
1286 } else {
1287 packed = fnvlist_pack(nvl, &size);
1288 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1289 size, zc->zc_iflags) != 0)
1290 error = EFAULT;
1291 fnvlist_pack_free(packed, size);
1292 }
1293
1294 zc->zc_nvlist_dst_size = size;
1295 zc->zc_nvlist_dst_filled = B_TRUE;
1296 return (error);
1297 }
1298
1299 static int
1300 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1301 {
1302 objset_t *os;
1303 int error;
1304
1305 error = dmu_objset_hold(dsname, FTAG, &os);
1306 if (error)
1307 return (error);
1308 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1309 dmu_objset_rele(os, FTAG);
1310 return (EINVAL);
1311 }
1312
1313 mutex_enter(&os->os_user_ptr_lock);
1314 *zfvp = dmu_objset_get_user(os);
1315 if (*zfvp) {
1316 VFS_HOLD((*zfvp)->z_vfs);
1317 } else {
1318 error = ESRCH;
1319 }
1320 mutex_exit(&os->os_user_ptr_lock);
1321 dmu_objset_rele(os, FTAG);
1322 return (error);
1323 }
1324
1325 /*
1326 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1327 * case its z_vfs will be NULL, and it will be opened as the owner.
1328 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1329 * which prevents all vnode ops from running.
1330 */
1331 static int
1332 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1333 {
1334 int error = 0;
1335
1336 if (getzfsvfs(name, zfvp) != 0)
1337 error = zfsvfs_create(name, zfvp);
1338 if (error == 0) {
1339 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1340 RW_READER, tag);
1341 if ((*zfvp)->z_unmounted) {
1342 /*
1343 * XXX we could probably try again, since the unmounting
1344 * thread should be just about to disassociate the
1345 * objset from the zfsvfs.
1346 */
1347 rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1348 return (EBUSY);
1349 }
1350 }
1351 return (error);
1352 }
1353
1354 static void
1355 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1356 {
1357 rrw_exit(&zfsvfs->z_teardown_lock, tag);
1358
1359 if (zfsvfs->z_vfs) {
1360 VFS_RELE(zfsvfs->z_vfs);
1361 } else {
1362 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1363 zfsvfs_free(zfsvfs);
1364 }
1365 }
1366
1367 static int
1368 zfs_ioc_pool_create(zfs_cmd_t *zc)
1369 {
1370 int error;
1371 nvlist_t *config, *props = NULL;
1372 nvlist_t *rootprops = NULL;
1373 nvlist_t *zplprops = NULL;
1374
1375 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1376 zc->zc_iflags, &config))
1377 return (error);
1378
1379 if (zc->zc_nvlist_src_size != 0 && (error =
1380 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1381 zc->zc_iflags, &props))) {
1382 nvlist_free(config);
1383 return (error);
1384 }
1385
1386 if (props) {
1387 nvlist_t *nvl = NULL;
1388 uint64_t version = SPA_VERSION;
1389
1390 (void) nvlist_lookup_uint64(props,
1391 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1392 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1393 error = EINVAL;
1394 goto pool_props_bad;
1395 }
1396 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1397 if (nvl) {
1398 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1399 if (error != 0) {
1400 nvlist_free(config);
1401 nvlist_free(props);
1402 return (error);
1403 }
1404 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1405 }
1406 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1407 error = zfs_fill_zplprops_root(version, rootprops,
1408 zplprops, NULL);
1409 if (error)
1410 goto pool_props_bad;
1411 }
1412
1413 error = spa_create(zc->zc_name, config, props, zplprops);
1414
1415 /*
1416 * Set the remaining root properties
1417 */
1418 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1419 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1420 (void) spa_destroy(zc->zc_name);
1421
1422 pool_props_bad:
1423 nvlist_free(rootprops);
1424 nvlist_free(zplprops);
1425 nvlist_free(config);
1426 nvlist_free(props);
1427
1428 return (error);
1429 }
1430
1431 static int
1432 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1433 {
1434 int error;
1435 zfs_log_history(zc);
1436 error = spa_destroy(zc->zc_name);
1437 if (error == 0)
1438 zvol_remove_minors(zc->zc_name);
1439 return (error);
1440 }
1441
1442 static int
1443 zfs_ioc_pool_import(zfs_cmd_t *zc)
1444 {
1445 nvlist_t *config, *props = NULL;
1446 uint64_t guid;
1447 int error;
1448
1449 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1450 zc->zc_iflags, &config)) != 0)
1451 return (error);
1452
1453 if (zc->zc_nvlist_src_size != 0 && (error =
1454 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1455 zc->zc_iflags, &props))) {
1456 nvlist_free(config);
1457 return (error);
1458 }
1459
1460 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1461 guid != zc->zc_guid)
1462 error = EINVAL;
1463 else
1464 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1465
1466 if (zc->zc_nvlist_dst != 0) {
1467 int err;
1468
1469 if ((err = put_nvlist(zc, config)) != 0)
1470 error = err;
1471 }
1472
1473 nvlist_free(config);
1474
1475 if (props)
1476 nvlist_free(props);
1477
1478 return (error);
1479 }
1480
1481 static int
1482 zfs_ioc_pool_export(zfs_cmd_t *zc)
1483 {
1484 int error;
1485 boolean_t force = (boolean_t)zc->zc_cookie;
1486 boolean_t hardforce = (boolean_t)zc->zc_guid;
1487
1488 zfs_log_history(zc);
1489 error = spa_export(zc->zc_name, NULL, force, hardforce);
1490 if (error == 0)
1491 zvol_remove_minors(zc->zc_name);
1492 return (error);
1493 }
1494
1495 static int
1496 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1497 {
1498 nvlist_t *configs;
1499 int error;
1500
1501 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1502 return (EEXIST);
1503
1504 error = put_nvlist(zc, configs);
1505
1506 nvlist_free(configs);
1507
1508 return (error);
1509 }
1510
1511 /*
1512 * inputs:
1513 * zc_name name of the pool
1514 *
1515 * outputs:
1516 * zc_cookie real errno
1517 * zc_nvlist_dst config nvlist
1518 * zc_nvlist_dst_size size of config nvlist
1519 */
1520 static int
1521 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1522 {
1523 nvlist_t *config;
1524 int error;
1525 int ret = 0;
1526
1527 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1528 sizeof (zc->zc_value));
1529
1530 if (config != NULL) {
1531 ret = put_nvlist(zc, config);
1532 nvlist_free(config);
1533
1534 /*
1535 * The config may be present even if 'error' is non-zero.
1536 * In this case we return success, and preserve the real errno
1537 * in 'zc_cookie'.
1538 */
1539 zc->zc_cookie = error;
1540 } else {
1541 ret = error;
1542 }
1543
1544 return (ret);
1545 }
1546
1547 /*
1548 * Try to import the given pool, returning pool stats as appropriate so that
1549 * user land knows which devices are available and overall pool health.
1550 */
1551 static int
1552 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1553 {
1554 nvlist_t *tryconfig, *config;
1555 int error;
1556
1557 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1558 zc->zc_iflags, &tryconfig)) != 0)
1559 return (error);
1560
1561 config = spa_tryimport(tryconfig);
1562
1563 nvlist_free(tryconfig);
1564
1565 if (config == NULL)
1566 return (EINVAL);
1567
1568 error = put_nvlist(zc, config);
1569 nvlist_free(config);
1570
1571 return (error);
1572 }
1573
1574 /*
1575 * inputs:
1576 * zc_name name of the pool
1577 * zc_cookie scan func (pool_scan_func_t)
1578 */
1579 static int
1580 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1581 {
1582 spa_t *spa;
1583 int error;
1584
1585 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1586 return (error);
1587
1588 if (zc->zc_cookie == POOL_SCAN_NONE)
1589 error = spa_scan_stop(spa);
1590 else
1591 error = spa_scan(spa, zc->zc_cookie);
1592
1593 spa_close(spa, FTAG);
1594
1595 return (error);
1596 }
1597
1598 static int
1599 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1600 {
1601 spa_t *spa;
1602 int error;
1603
1604 error = spa_open(zc->zc_name, &spa, FTAG);
1605 if (error == 0) {
1606 spa_freeze(spa);
1607 spa_close(spa, FTAG);
1608 }
1609 return (error);
1610 }
1611
1612 static int
1613 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1614 {
1615 spa_t *spa;
1616 int error;
1617
1618 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1619 return (error);
1620
1621 if (zc->zc_cookie < spa_version(spa) ||
1622 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1623 spa_close(spa, FTAG);
1624 return (EINVAL);
1625 }
1626
1627 spa_upgrade(spa, zc->zc_cookie);
1628 spa_close(spa, FTAG);
1629
1630 return (error);
1631 }
1632
1633 static int
1634 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1635 {
1636 spa_t *spa;
1637 char *hist_buf;
1638 uint64_t size;
1639 int error;
1640
1641 if ((size = zc->zc_history_len) == 0)
1642 return (EINVAL);
1643
1644 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1645 return (error);
1646
1647 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1648 spa_close(spa, FTAG);
1649 return (ENOTSUP);
1650 }
1651
1652 hist_buf = kmem_alloc(size, KM_SLEEP);
1653 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1654 &zc->zc_history_len, hist_buf)) == 0) {
1655 error = ddi_copyout(hist_buf,
1656 (void *)(uintptr_t)zc->zc_history,
1657 zc->zc_history_len, zc->zc_iflags);
1658 }
1659
1660 spa_close(spa, FTAG);
1661 kmem_free(hist_buf, size);
1662 return (error);
1663 }
1664
1665 static int
1666 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1667 {
1668 spa_t *spa;
1669 int error;
1670
1671 error = spa_open(zc->zc_name, &spa, FTAG);
1672 if (error == 0) {
1673 error = spa_change_guid(spa);
1674 spa_close(spa, FTAG);
1675 }
1676 return (error);
1677 }
1678
1679 static int
1680 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1681 {
1682 int error;
1683
1684 if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value))
1685 return (error);
1686
1687 return (0);
1688 }
1689
1690 /*
1691 * inputs:
1692 * zc_name name of filesystem
1693 * zc_obj object to find
1694 *
1695 * outputs:
1696 * zc_value name of object
1697 */
1698 static int
1699 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1700 {
1701 objset_t *os;
1702 int error;
1703
1704 /* XXX reading from objset not owned */
1705 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1706 return (error);
1707 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1708 dmu_objset_rele(os, FTAG);
1709 return (EINVAL);
1710 }
1711 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1712 sizeof (zc->zc_value));
1713 dmu_objset_rele(os, FTAG);
1714
1715 return (error);
1716 }
1717
1718 /*
1719 * inputs:
1720 * zc_name name of filesystem
1721 * zc_obj object to find
1722 *
1723 * outputs:
1724 * zc_stat stats on object
1725 * zc_value path to object
1726 */
1727 static int
1728 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1729 {
1730 objset_t *os;
1731 int error;
1732
1733 /* XXX reading from objset not owned */
1734 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1735 return (error);
1736 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1737 dmu_objset_rele(os, FTAG);
1738 return (EINVAL);
1739 }
1740 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1741 sizeof (zc->zc_value));
1742 dmu_objset_rele(os, FTAG);
1743
1744 return (error);
1745 }
1746
1747 static int
1748 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1749 {
1750 spa_t *spa;
1751 int error;
1752 nvlist_t *config, **l2cache, **spares;
1753 uint_t nl2cache = 0, nspares = 0;
1754
1755 error = spa_open(zc->zc_name, &spa, FTAG);
1756 if (error != 0)
1757 return (error);
1758
1759 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1760 zc->zc_iflags, &config);
1761 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1762 &l2cache, &nl2cache);
1763
1764 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1765 &spares, &nspares);
1766
1767 /*
1768 * A root pool with concatenated devices is not supported.
1769 * Thus, can not add a device to a root pool.
1770 *
1771 * Intent log device can not be added to a rootpool because
1772 * during mountroot, zil is replayed, a seperated log device
1773 * can not be accessed during the mountroot time.
1774 *
1775 * l2cache and spare devices are ok to be added to a rootpool.
1776 */
1777 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1778 nvlist_free(config);
1779 spa_close(spa, FTAG);
1780 return (EDOM);
1781 }
1782
1783 if (error == 0) {
1784 error = spa_vdev_add(spa, config);
1785 nvlist_free(config);
1786 }
1787 spa_close(spa, FTAG);
1788 return (error);
1789 }
1790
1791 /*
1792 * inputs:
1793 * zc_name name of the pool
1794 * zc_nvlist_conf nvlist of devices to remove
1795 * zc_cookie to stop the remove?
1796 */
1797 static int
1798 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1799 {
1800 spa_t *spa;
1801 int error;
1802
1803 error = spa_open(zc->zc_name, &spa, FTAG);
1804 if (error != 0)
1805 return (error);
1806 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1807 spa_close(spa, FTAG);
1808 return (error);
1809 }
1810
1811 static int
1812 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1813 {
1814 spa_t *spa;
1815 int error;
1816 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1817
1818 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1819 return (error);
1820 switch (zc->zc_cookie) {
1821 case VDEV_STATE_ONLINE:
1822 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1823 break;
1824
1825 case VDEV_STATE_OFFLINE:
1826 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1827 break;
1828
1829 case VDEV_STATE_FAULTED:
1830 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1831 zc->zc_obj != VDEV_AUX_EXTERNAL)
1832 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1833
1834 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1835 break;
1836
1837 case VDEV_STATE_DEGRADED:
1838 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1839 zc->zc_obj != VDEV_AUX_EXTERNAL)
1840 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1841
1842 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1843 break;
1844
1845 default:
1846 error = EINVAL;
1847 }
1848 zc->zc_cookie = newstate;
1849 spa_close(spa, FTAG);
1850 return (error);
1851 }
1852
1853 static int
1854 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1855 {
1856 spa_t *spa;
1857 int replacing = zc->zc_cookie;
1858 nvlist_t *config;
1859 int error;
1860
1861 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1862 return (error);
1863
1864 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1865 zc->zc_iflags, &config)) == 0) {
1866 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1867 nvlist_free(config);
1868 }
1869
1870 spa_close(spa, FTAG);
1871 return (error);
1872 }
1873
1874 static int
1875 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1876 {
1877 spa_t *spa;
1878 int error;
1879
1880 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1881 return (error);
1882
1883 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1884
1885 spa_close(spa, FTAG);
1886 return (error);
1887 }
1888
1889 static int
1890 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1891 {
1892 spa_t *spa;
1893 nvlist_t *config, *props = NULL;
1894 int error;
1895 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1896
1897 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1898 return (error);
1899
1900 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1901 zc->zc_iflags, &config)) {
1902 spa_close(spa, FTAG);
1903 return (error);
1904 }
1905
1906 if (zc->zc_nvlist_src_size != 0 && (error =
1907 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1908 zc->zc_iflags, &props))) {
1909 spa_close(spa, FTAG);
1910 nvlist_free(config);
1911 return (error);
1912 }
1913
1914 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1915
1916 spa_close(spa, FTAG);
1917
1918 nvlist_free(config);
1919 nvlist_free(props);
1920
1921 return (error);
1922 }
1923
1924 static int
1925 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
1926 {
1927 spa_t *spa;
1928 char *path = zc->zc_value;
1929 uint64_t guid = zc->zc_guid;
1930 int error;
1931
1932 error = spa_open(zc->zc_name, &spa, FTAG);
1933 if (error != 0)
1934 return (error);
1935
1936 error = spa_vdev_setpath(spa, guid, path);
1937 spa_close(spa, FTAG);
1938 return (error);
1939 }
1940
1941 static int
1942 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
1943 {
1944 spa_t *spa;
1945 char *fru = zc->zc_value;
1946 uint64_t guid = zc->zc_guid;
1947 int error;
1948
1949 error = spa_open(zc->zc_name, &spa, FTAG);
1950 if (error != 0)
1951 return (error);
1952
1953 error = spa_vdev_setfru(spa, guid, fru);
1954 spa_close(spa, FTAG);
1955 return (error);
1956 }
1957
1958 static int
1959 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
1960 {
1961 int error = 0;
1962 nvlist_t *nv;
1963
1964 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1965
1966 if (zc->zc_nvlist_dst != 0 &&
1967 (error = dsl_prop_get_all(os, &nv)) == 0) {
1968 dmu_objset_stats(os, nv);
1969 /*
1970 * NB: zvol_get_stats() will read the objset contents,
1971 * which we aren't supposed to do with a
1972 * DS_MODE_USER hold, because it could be
1973 * inconsistent. So this is a bit of a workaround...
1974 * XXX reading with out owning
1975 */
1976 if (!zc->zc_objset_stats.dds_inconsistent &&
1977 dmu_objset_type(os) == DMU_OST_ZVOL) {
1978 error = zvol_get_stats(os, nv);
1979 if (error == EIO)
1980 return (error);
1981 VERIFY3S(error, ==, 0);
1982 }
1983 error = put_nvlist(zc, nv);
1984 nvlist_free(nv);
1985 }
1986
1987 return (error);
1988 }
1989
1990 /*
1991 * inputs:
1992 * zc_name name of filesystem
1993 * zc_nvlist_dst_size size of buffer for property nvlist
1994 *
1995 * outputs:
1996 * zc_objset_stats stats
1997 * zc_nvlist_dst property nvlist
1998 * zc_nvlist_dst_size size of property nvlist
1999 */
2000 static int
2001 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2002 {
2003 objset_t *os = NULL;
2004 int error;
2005
2006 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
2007 return (error);
2008
2009 error = zfs_ioc_objset_stats_impl(zc, os);
2010
2011 dmu_objset_rele(os, FTAG);
2012
2013 return (error);
2014 }
2015
2016 /*
2017 * inputs:
2018 * zc_name name of filesystem
2019 * zc_nvlist_dst_size size of buffer for property nvlist
2020 *
2021 * outputs:
2022 * zc_nvlist_dst received property nvlist
2023 * zc_nvlist_dst_size size of received property nvlist
2024 *
2025 * Gets received properties (distinct from local properties on or after
2026 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2027 * local property values.
2028 */
2029 static int
2030 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2031 {
2032 objset_t *os = NULL;
2033 int error;
2034 nvlist_t *nv;
2035
2036 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
2037 return (error);
2038
2039 /*
2040 * Without this check, we would return local property values if the
2041 * caller has not already received properties on or after
2042 * SPA_VERSION_RECVD_PROPS.
2043 */
2044 if (!dsl_prop_get_hasrecvd(os)) {
2045 dmu_objset_rele(os, FTAG);
2046 return (ENOTSUP);
2047 }
2048
2049 if (zc->zc_nvlist_dst != 0 &&
2050 (error = dsl_prop_get_received(os, &nv)) == 0) {
2051 error = put_nvlist(zc, nv);
2052 nvlist_free(nv);
2053 }
2054
2055 dmu_objset_rele(os, FTAG);
2056 return (error);
2057 }
2058
2059 static int
2060 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2061 {
2062 uint64_t value;
2063 int error;
2064
2065 /*
2066 * zfs_get_zplprop() will either find a value or give us
2067 * the default value (if there is one).
2068 */
2069 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2070 return (error);
2071 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2072 return (0);
2073 }
2074
2075 /*
2076 * inputs:
2077 * zc_name name of filesystem
2078 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2079 *
2080 * outputs:
2081 * zc_nvlist_dst zpl property nvlist
2082 * zc_nvlist_dst_size size of zpl property nvlist
2083 */
2084 static int
2085 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2086 {
2087 objset_t *os;
2088 int err;
2089
2090 /* XXX reading without owning */
2091 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2092 return (err);
2093
2094 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2095
2096 /*
2097 * NB: nvl_add_zplprop() will read the objset contents,
2098 * which we aren't supposed to do with a DS_MODE_USER
2099 * hold, because it could be inconsistent.
2100 */
2101 if (zc->zc_nvlist_dst != NULL &&
2102 !zc->zc_objset_stats.dds_inconsistent &&
2103 dmu_objset_type(os) == DMU_OST_ZFS) {
2104 nvlist_t *nv;
2105
2106 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2107 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2108 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2109 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2110 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2111 err = put_nvlist(zc, nv);
2112 nvlist_free(nv);
2113 } else {
2114 err = ENOENT;
2115 }
2116 dmu_objset_rele(os, FTAG);
2117 return (err);
2118 }
2119
2120 static boolean_t
2121 dataset_name_hidden(const char *name)
2122 {
2123 /*
2124 * Skip over datasets that are not visible in this zone,
2125 * internal datasets (which have a $ in their name), and
2126 * temporary datasets (which have a % in their name).
2127 */
2128 if (strchr(name, '$') != NULL)
2129 return (B_TRUE);
2130 if (strchr(name, '%') != NULL)
2131 return (B_TRUE);
2132 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2133 return (B_TRUE);
2134 return (B_FALSE);
2135 }
2136
2137 /*
2138 * inputs:
2139 * zc_name name of filesystem
2140 * zc_cookie zap cursor
2141 * zc_nvlist_dst_size size of buffer for property nvlist
2142 *
2143 * outputs:
2144 * zc_name name of next filesystem
2145 * zc_cookie zap cursor
2146 * zc_objset_stats stats
2147 * zc_nvlist_dst property nvlist
2148 * zc_nvlist_dst_size size of property nvlist
2149 */
2150 static int
2151 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2152 {
2153 objset_t *os;
2154 int error;
2155 char *p;
2156 size_t orig_len = strlen(zc->zc_name);
2157
2158 top:
2159 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2160 if (error == ENOENT)
2161 error = ESRCH;
2162 return (error);
2163 }
2164
2165 p = strrchr(zc->zc_name, '/');
2166 if (p == NULL || p[1] != '\0')
2167 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2168 p = zc->zc_name + strlen(zc->zc_name);
2169
2170 /*
2171 * Pre-fetch the datasets. dmu_objset_prefetch() always returns 0
2172 * but is not declared void because its called by dmu_objset_find().
2173 */
2174 if (zc->zc_cookie == 0) {
2175 uint64_t cookie = 0;
2176 int len = sizeof (zc->zc_name) - (p - zc->zc_name);
2177
2178 while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0) {
2179 if (!dataset_name_hidden(zc->zc_name))
2180 (void) dmu_objset_prefetch(zc->zc_name, NULL);
2181 }
2182 }
2183
2184 do {
2185 error = dmu_dir_list_next(os,
2186 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2187 NULL, &zc->zc_cookie);
2188 if (error == ENOENT)
2189 error = ESRCH;
2190 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2191 dmu_objset_rele(os, FTAG);
2192
2193 /*
2194 * If it's an internal dataset (ie. with a '$' in its name),
2195 * don't try to get stats for it, otherwise we'll return ENOENT.
2196 */
2197 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2198 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2199 if (error == ENOENT) {
2200 /* We lost a race with destroy, get the next one. */
2201 zc->zc_name[orig_len] = '\0';
2202 goto top;
2203 }
2204 }
2205 return (error);
2206 }
2207
2208 /*
2209 * inputs:
2210 * zc_name name of filesystem
2211 * zc_cookie zap cursor
2212 * zc_nvlist_dst_size size of buffer for property nvlist
2213 *
2214 * outputs:
2215 * zc_name name of next snapshot
2216 * zc_objset_stats stats
2217 * zc_nvlist_dst property nvlist
2218 * zc_nvlist_dst_size size of property nvlist
2219 */
2220 static int
2221 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2222 {
2223 objset_t *os;
2224 int error;
2225
2226 top:
2227 if (zc->zc_cookie == 0)
2228 (void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch,
2229 NULL, DS_FIND_SNAPSHOTS);
2230
2231 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2232 if (error)
2233 return (error == ENOENT ? ESRCH : error);
2234
2235 /*
2236 * A dataset name of maximum length cannot have any snapshots,
2237 * so exit immediately.
2238 */
2239 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2240 dmu_objset_rele(os, FTAG);
2241 return (ESRCH);
2242 }
2243
2244 error = dmu_snapshot_list_next(os,
2245 sizeof (zc->zc_name) - strlen(zc->zc_name),
2246 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2247 NULL);
2248
2249 if (error == 0) {
2250 dsl_dataset_t *ds;
2251 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2252
2253 /*
2254 * Since we probably don't have a hold on this snapshot,
2255 * it's possible that the objsetid could have been destroyed
2256 * and reused for a new objset. It's OK if this happens during
2257 * a zfs send operation, since the new createtxg will be
2258 * beyond the range we're interested in.
2259 */
2260 rw_enter(&dp->dp_config_rwlock, RW_READER);
2261 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2262 rw_exit(&dp->dp_config_rwlock);
2263 if (error) {
2264 if (error == ENOENT) {
2265 /* Racing with destroy, get the next one. */
2266 *strchr(zc->zc_name, '@') = '\0';
2267 dmu_objset_rele(os, FTAG);
2268 goto top;
2269 }
2270 } else {
2271 objset_t *ossnap;
2272
2273 error = dmu_objset_from_ds(ds, &ossnap);
2274 if (error == 0)
2275 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2276 dsl_dataset_rele(ds, FTAG);
2277 }
2278 } else if (error == ENOENT) {
2279 error = ESRCH;
2280 }
2281
2282 dmu_objset_rele(os, FTAG);
2283 /* if we failed, undo the @ that we tacked on to zc_name */
2284 if (error)
2285 *strchr(zc->zc_name, '@') = '\0';
2286 return (error);
2287 }
2288
2289 static int
2290 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2291 {
2292 const char *propname = nvpair_name(pair);
2293 uint64_t *valary;
2294 unsigned int vallen;
2295 const char *domain;
2296 char *dash;
2297 zfs_userquota_prop_t type;
2298 uint64_t rid;
2299 uint64_t quota;
2300 zfsvfs_t *zfsvfs;
2301 int err;
2302
2303 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2304 nvlist_t *attrs;
2305 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2306 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2307 &pair) != 0)
2308 return (EINVAL);
2309 }
2310
2311 /*
2312 * A correctly constructed propname is encoded as
2313 * userquota@<rid>-<domain>.
2314 */
2315 if ((dash = strchr(propname, '-')) == NULL ||
2316 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2317 vallen != 3)
2318 return (EINVAL);
2319
2320 domain = dash + 1;
2321 type = valary[0];
2322 rid = valary[1];
2323 quota = valary[2];
2324
2325 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2326 if (err == 0) {
2327 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2328 zfsvfs_rele(zfsvfs, FTAG);
2329 }
2330
2331 return (err);
2332 }
2333
2334 /*
2335 * If the named property is one that has a special function to set its value,
2336 * return 0 on success and a positive error code on failure; otherwise if it is
2337 * not one of the special properties handled by this function, return -1.
2338 *
2339 * XXX: It would be better for callers of the property interface if we handled
2340 * these special cases in dsl_prop.c (in the dsl layer).
2341 */
2342 static int
2343 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2344 nvpair_t *pair)
2345 {
2346 const char *propname = nvpair_name(pair);
2347 zfs_prop_t prop = zfs_name_to_prop(propname);
2348 uint64_t intval;
2349 int err;
2350
2351 if (prop == ZPROP_INVAL) {
2352 if (zfs_prop_userquota(propname))
2353 return (zfs_prop_set_userquota(dsname, pair));
2354 return (-1);
2355 }
2356
2357 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2358 nvlist_t *attrs;
2359 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2360 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2361 &pair) == 0);
2362 }
2363
2364 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2365 return (-1);
2366
2367 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2368
2369 switch (prop) {
2370 case ZFS_PROP_QUOTA:
2371 err = dsl_dir_set_quota(dsname, source, intval);
2372 break;
2373 case ZFS_PROP_REFQUOTA:
2374 err = dsl_dataset_set_quota(dsname, source, intval);
2375 break;
2376 case ZFS_PROP_RESERVATION:
2377 err = dsl_dir_set_reservation(dsname, source, intval);
2378 break;
2379 case ZFS_PROP_REFRESERVATION:
2380 err = dsl_dataset_set_reservation(dsname, source, intval);
2381 break;
2382 case ZFS_PROP_VOLSIZE:
2383 err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip),
2384 intval);
2385 break;
2386 case ZFS_PROP_VERSION:
2387 {
2388 zfsvfs_t *zfsvfs;
2389
2390 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2391 break;
2392
2393 err = zfs_set_version(zfsvfs, intval);
2394 zfsvfs_rele(zfsvfs, FTAG);
2395
2396 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2397 zfs_cmd_t *zc;
2398
2399 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2400 (void) strcpy(zc->zc_name, dsname);
2401 (void) zfs_ioc_userspace_upgrade(zc);
2402 kmem_free(zc, sizeof (zfs_cmd_t));
2403 }
2404 break;
2405 }
2406
2407 default:
2408 err = -1;
2409 }
2410
2411 return (err);
2412 }
2413
2414 /*
2415 * This function is best effort. If it fails to set any of the given properties,
2416 * it continues to set as many as it can and returns the last error
2417 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2418 * with the list of names of all the properties that failed along with the
2419 * corresponding error numbers.
2420 *
2421 * If every property is set successfully, zero is returned and errlist is not
2422 * modified.
2423 */
2424 int
2425 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2426 nvlist_t *errlist)
2427 {
2428 nvpair_t *pair;
2429 nvpair_t *propval;
2430 int rv = 0;
2431 uint64_t intval;
2432 char *strval;
2433 nvlist_t *genericnvl = fnvlist_alloc();
2434 nvlist_t *retrynvl = fnvlist_alloc();
2435 zfsvfs_t *zfsvfs;
2436 boolean_t set_worm = B_FALSE;
2437
2438 retry:
2439 pair = NULL;
2440 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2441 const char *propname = nvpair_name(pair);
2442 zfs_prop_t prop = zfs_name_to_prop(propname);
2443 int err = 0;
2444
2445 if (!set_worm && (strcmp(propname, "nms:worm") == 0)) {
2446 set_worm = B_TRUE;
2447 }
2448
2449 cmn_err(CE_NOTE, "The property is %s\n", propname);
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 = 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 = EINVAL;
2465 } else if (zfs_prop_userquota(propname)) {
2466 if (nvpair_type(propval) !=
2467 DATA_TYPE_UINT64_ARRAY)
2468 err = EINVAL;
2469 } else {
2470 err = 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 = 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 = EINVAL;
2486 break;
2487 case PROP_TYPE_INDEX:
2488 if (zfs_prop_index_to_string(prop,
2489 intval, &unused) != 0)
2490 err = EINVAL;
2491 break;
2492 default:
2493 cmn_err(CE_PANIC,
2494 "unknown property type");
2495 }
2496 } else {
2497 err = 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(dsname, propname, source, 1,
2557 strlen(strval) + 1, strval);
2558 } else {
2559 intval = fnvpair_value_uint64(propval);
2560 err = dsl_prop_set(dsname, propname, source, 8,
2561 1, &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 if (set_worm && getzfsvfs(dsname, &zfsvfs) == 0) {
2577 if (zfs_is_wormed(dsname)) {
2578 zfsvfs->z_isworm = B_TRUE;
2579 } else {
2580 zfsvfs->z_isworm = B_FALSE;
2581 }
2582 VFS_RELE(zfsvfs->z_vfs);
2583 }
2584
2585 return (rv);
2586 }
2587
2588 /*
2589 * Check that all the properties are valid user properties.
2590 */
2591 static int
2592 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2593 {
2594 nvpair_t *pair = NULL;
2595 int error = 0;
2596
2597 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2598 const char *propname = nvpair_name(pair);
2599 char *valstr;
2600
2601 if (!zfs_prop_user(propname) ||
2602 nvpair_type(pair) != DATA_TYPE_STRING)
2603 return (EINVAL);
2604
2605 if (error = zfs_secpolicy_write_perms(fsname,
2606 ZFS_DELEG_PERM_USERPROP, CRED()))
2607 return (error);
2608
2609 if (strlen(propname) >= ZAP_MAXNAMELEN)
2610 return (ENAMETOOLONG);
2611
2612 VERIFY(nvpair_value_string(pair, &valstr) == 0);
2613 if (strlen(valstr) >= ZAP_MAXVALUELEN)
2614 return (E2BIG);
2615 }
2616 return (0);
2617 }
2618
2619 static void
2620 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2621 {
2622 nvpair_t *pair;
2623
2624 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2625
2626 pair = NULL;
2627 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2628 if (nvlist_exists(skipped, nvpair_name(pair)))
2629 continue;
2630
2631 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2632 }
2633 }
2634
2635 static int
2636 clear_received_props(objset_t *os, const char *fs, nvlist_t *props,
2637 nvlist_t *skipped)
2638 {
2639 int err = 0;
2640 nvlist_t *cleared_props = NULL;
2641 props_skip(props, skipped, &cleared_props);
2642 if (!nvlist_empty(cleared_props)) {
2643 /*
2644 * Acts on local properties until the dataset has received
2645 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2646 */
2647 zprop_source_t flags = (ZPROP_SRC_NONE |
2648 (dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0));
2649 err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL);
2650 }
2651 nvlist_free(cleared_props);
2652 return (err);
2653 }
2654
2655 /*
2656 * inputs:
2657 * zc_name name of filesystem
2658 * zc_value name of property to set
2659 * zc_nvlist_src{_size} nvlist of properties to apply
2660 * zc_cookie received properties flag
2661 *
2662 * outputs:
2663 * zc_nvlist_dst{_size} error for each unapplied received property
2664 */
2665 static int
2666 zfs_ioc_set_prop(zfs_cmd_t *zc)
2667 {
2668 nvlist_t *nvl;
2669 boolean_t received = zc->zc_cookie;
2670 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2671 ZPROP_SRC_LOCAL);
2672 nvlist_t *errors;
2673 int error;
2674
2675 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2676 zc->zc_iflags, &nvl)) != 0)
2677 return (error);
2678
2679 if (received) {
2680 nvlist_t *origprops;
2681 objset_t *os;
2682
2683 if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) {
2684 if (dsl_prop_get_received(os, &origprops) == 0) {
2685 (void) clear_received_props(os,
2686 zc->zc_name, origprops, nvl);
2687 nvlist_free(origprops);
2688 }
2689
2690 dsl_prop_set_hasrecvd(os);
2691 dmu_objset_rele(os, FTAG);
2692 }
2693 }
2694
2695 errors = fnvlist_alloc();
2696 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2697
2698 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2699 (void) put_nvlist(zc, errors);
2700 }
2701
2702 nvlist_free(errors);
2703 nvlist_free(nvl);
2704 return (error);
2705 }
2706
2707 /*
2708 * inputs:
2709 * zc_name name of filesystem
2710 * zc_value name of property to inherit
2711 * zc_cookie revert to received value if TRUE
2712 *
2713 * outputs: none
2714 */
2715 static int
2716 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2717 {
2718 const char *propname = zc->zc_value;
2719 zfs_prop_t prop = zfs_name_to_prop(propname);
2720 boolean_t received = zc->zc_cookie;
2721 zprop_source_t source = (received
2722 ? ZPROP_SRC_NONE /* revert to received value, if any */
2723 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2724
2725 if (received) {
2726 nvlist_t *dummy;
2727 nvpair_t *pair;
2728 zprop_type_t type;
2729 int err;
2730
2731 /*
2732 * zfs_prop_set_special() expects properties in the form of an
2733 * nvpair with type info.
2734 */
2735 if (prop == ZPROP_INVAL) {
2736 if (!zfs_prop_user(propname))
2737 return (EINVAL);
2738
2739 type = PROP_TYPE_STRING;
2740 } else if (prop == ZFS_PROP_VOLSIZE ||
2741 prop == ZFS_PROP_VERSION) {
2742 return (EINVAL);
2743 } else {
2744 type = zfs_prop_get_type(prop);
2745 }
2746
2747 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2748
2749 switch (type) {
2750 case PROP_TYPE_STRING:
2751 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2752 break;
2753 case PROP_TYPE_NUMBER:
2754 case PROP_TYPE_INDEX:
2755 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2756 break;
2757 default:
2758 nvlist_free(dummy);
2759 return (EINVAL);
2760 }
2761
2762 pair = nvlist_next_nvpair(dummy, NULL);
2763 err = zfs_prop_set_special(zc->zc_name, source, pair);
2764 nvlist_free(dummy);
2765 if (err != -1)
2766 return (err); /* special property already handled */
2767 } else {
2768 /*
2769 * Only check this in the non-received case. We want to allow
2770 * 'inherit -S' to revert non-inheritable properties like quota
2771 * and reservation to the received or default values even though
2772 * they are not considered inheritable.
2773 */
2774 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2775 return (EINVAL);
2776 }
2777
2778 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2779 return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL));
2780 }
2781
2782 static int
2783 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2784 {
2785 nvlist_t *props;
2786 spa_t *spa;
2787 int error;
2788 nvpair_t *pair;
2789
2790 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2791 zc->zc_iflags, &props))
2792 return (error);
2793
2794 /*
2795 * If the only property is the configfile, then just do a spa_lookup()
2796 * to handle the faulted case.
2797 */
2798 pair = nvlist_next_nvpair(props, NULL);
2799 if (pair != NULL && strcmp(nvpair_name(pair),
2800 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2801 nvlist_next_nvpair(props, pair) == NULL) {
2802 mutex_enter(&spa_namespace_lock);
2803 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2804 spa_configfile_set(spa, props, B_FALSE);
2805 spa_config_sync(spa, B_FALSE, B_TRUE);
2806 }
2807 mutex_exit(&spa_namespace_lock);
2808 if (spa != NULL) {
2809 nvlist_free(props);
2810 return (0);
2811 }
2812 }
2813
2814 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2815 nvlist_free(props);
2816 return (error);
2817 }
2818
2819 error = spa_prop_set(spa, props);
2820
2821 nvlist_free(props);
2822 spa_close(spa, FTAG);
2823
2824 return (error);
2825 }
2826
2827 static int
2828 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2829 {
2830 spa_t *spa;
2831 int error;
2832 nvlist_t *nvp = NULL;
2833
2834 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2835 /*
2836 * If the pool is faulted, there may be properties we can still
2837 * get (such as altroot and cachefile), so attempt to get them
2838 * anyway.
2839 */
2840 mutex_enter(&spa_namespace_lock);
2841 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2842 error = spa_prop_get(spa, &nvp);
2843 mutex_exit(&spa_namespace_lock);
2844 } else {
2845 error = spa_prop_get(spa, &nvp);
2846 spa_close(spa, FTAG);
2847 }
2848
2849 if (error == 0 && zc->zc_nvlist_dst != NULL)
2850 error = put_nvlist(zc, nvp);
2851 else
2852 error = EFAULT;
2853
2854 nvlist_free(nvp);
2855 return (error);
2856 }
2857
2858 /*
2859 * inputs:
2860 * zc_name name of filesystem
2861 * zc_nvlist_src{_size} nvlist of delegated permissions
2862 * zc_perm_action allow/unallow flag
2863 *
2864 * outputs: none
2865 */
2866 static int
2867 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2868 {
2869 int error;
2870 nvlist_t *fsaclnv = NULL;
2871
2872 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2873 zc->zc_iflags, &fsaclnv)) != 0)
2874 return (error);
2875
2876 /*
2877 * Verify nvlist is constructed correctly
2878 */
2879 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2880 nvlist_free(fsaclnv);
2881 return (EINVAL);
2882 }
2883
2884 /*
2885 * If we don't have PRIV_SYS_MOUNT, then validate
2886 * that user is allowed to hand out each permission in
2887 * the nvlist(s)
2888 */
2889
2890 error = secpolicy_zfs(CRED());
2891 if (error) {
2892 if (zc->zc_perm_action == B_FALSE) {
2893 error = dsl_deleg_can_allow(zc->zc_name,
2894 fsaclnv, CRED());
2895 } else {
2896 error = dsl_deleg_can_unallow(zc->zc_name,
2897 fsaclnv, CRED());
2898 }
2899 }
2900
2901 if (error == 0)
2902 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2903
2904 nvlist_free(fsaclnv);
2905 return (error);
2906 }
2907
2908 /*
2909 * inputs:
2910 * zc_name name of filesystem
2911 *
2912 * outputs:
2913 * zc_nvlist_src{_size} nvlist of delegated permissions
2914 */
2915 static int
2916 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2917 {
2918 nvlist_t *nvp;
2919 int error;
2920
2921 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2922 error = put_nvlist(zc, nvp);
2923 nvlist_free(nvp);
2924 }
2925
2926 return (error);
2927 }
2928
2929 /*
2930 * Search the vfs list for a specified resource. Returns a pointer to it
2931 * or NULL if no suitable entry is found. The caller of this routine
2932 * is responsible for releasing the returned vfs pointer.
2933 */
2934 static vfs_t *
2935 zfs_get_vfs(const char *resource)
2936 {
2937 struct vfs *vfsp;
2938 struct vfs *vfs_found = NULL;
2939
2940 vfs_list_read_lock();
2941 vfsp = rootvfs;
2942 do {
2943 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2944 VFS_HOLD(vfsp);
2945 vfs_found = vfsp;
2946 break;
2947 }
2948 vfsp = vfsp->vfs_next;
2949 } while (vfsp != rootvfs);
2950 vfs_list_unlock();
2951 return (vfs_found);
2952 }
2953
2954 /* ARGSUSED */
2955 static void
2956 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2957 {
2958 zfs_creat_t *zct = arg;
2959
2960 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2961 }
2962
2963 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2964
2965 /*
2966 * inputs:
2967 * createprops list of properties requested by creator
2968 * default_zplver zpl version to use if unspecified in createprops
2969 * fuids_ok fuids allowed in this version of the spa?
2970 * os parent objset pointer (NULL if root fs)
2971 *
2972 * outputs:
2973 * zplprops values for the zplprops we attach to the master node object
2974 * is_ci true if requested file system will be purely case-insensitive
2975 *
2976 * Determine the settings for utf8only, normalization and
2977 * casesensitivity. Specific values may have been requested by the
2978 * creator and/or we can inherit values from the parent dataset. If
2979 * the file system is of too early a vintage, a creator can not
2980 * request settings for these properties, even if the requested
2981 * setting is the default value. We don't actually want to create dsl
2982 * properties for these, so remove them from the source nvlist after
2983 * processing.
2984 */
2985 static int
2986 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
2987 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
2988 nvlist_t *zplprops, boolean_t *is_ci)
2989 {
2990 uint64_t sense = ZFS_PROP_UNDEFINED;
2991 uint64_t norm = ZFS_PROP_UNDEFINED;
2992 uint64_t u8 = ZFS_PROP_UNDEFINED;
2993
2994 ASSERT(zplprops != NULL);
2995
2996 /*
2997 * Pull out creator prop choices, if any.
2998 */
2999 if (createprops) {
3000 (void) nvlist_lookup_uint64(createprops,
3001 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
3002 (void) nvlist_lookup_uint64(createprops,
3003 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
3004 (void) nvlist_remove_all(createprops,
3005 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
3006 (void) nvlist_lookup_uint64(createprops,
3007 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
3008 (void) nvlist_remove_all(createprops,
3009 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
3010 (void) nvlist_lookup_uint64(createprops,
3011 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3012 (void) nvlist_remove_all(createprops,
3013 zfs_prop_to_name(ZFS_PROP_CASE));
3014 }
3015
3016 /*
3017 * If the zpl version requested is whacky or the file system
3018 * or pool is version is too "young" to support normalization
3019 * and the creator tried to set a value for one of the props,
3020 * error out.
3021 */
3022 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3023 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3024 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3025 (zplver < ZPL_VERSION_NORMALIZATION &&
3026 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3027 sense != ZFS_PROP_UNDEFINED)))
3028 return (ENOTSUP);
3029
3030 /*
3031 * Put the version in the zplprops
3032 */
3033 VERIFY(nvlist_add_uint64(zplprops,
3034 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3035
3036 if (norm == ZFS_PROP_UNDEFINED)
3037 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3038 VERIFY(nvlist_add_uint64(zplprops,
3039 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3040
3041 if (os) {
3042 char osname[MAXNAMELEN];
3043
3044 dmu_objset_name(os, osname);
3045 if (zfs_is_wormed(osname))
3046 return (EPERM);
3047 }
3048
3049 /*
3050 * If we're normalizing, names must always be valid UTF-8 strings.
3051 */
3052 if (norm)
3053 u8 = 1;
3054 if (u8 == ZFS_PROP_UNDEFINED)
3055 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3056 VERIFY(nvlist_add_uint64(zplprops,
3057 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3058
3059 if (sense == ZFS_PROP_UNDEFINED)
3060 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3061 VERIFY(nvlist_add_uint64(zplprops,
3062 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3063
3064 if (is_ci)
3065 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3066
3067 return (0);
3068 }
3069
3070 static int
3071 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3072 nvlist_t *zplprops, boolean_t *is_ci)
3073 {
3074 boolean_t fuids_ok, sa_ok;
3075 uint64_t zplver = ZPL_VERSION;
3076 objset_t *os = NULL;
3077 char parentname[MAXNAMELEN];
3078 char *cp;
3079 spa_t *spa;
3080 uint64_t spa_vers;
3081 int error;
3082
3083 (void) strlcpy(parentname, dataset, sizeof (parentname));
3084 cp = strrchr(parentname, '/');
3085 ASSERT(cp != NULL);
3086 cp[0] = '\0';
3087
3088 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3089 return (error);
3090
3091 spa_vers = spa_version(spa);
3092 spa_close(spa, FTAG);
3093
3094 zplver = zfs_zpl_version_map(spa_vers);
3095 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3096 sa_ok = (zplver >= ZPL_VERSION_SA);
3097
3098 /*
3099 * Open parent object set so we can inherit zplprop values.
3100 */
3101 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3102 return (error);
3103
3104 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3105 zplprops, is_ci);
3106 dmu_objset_rele(os, FTAG);
3107 return (error);
3108 }
3109
3110 static int
3111 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3112 nvlist_t *zplprops, boolean_t *is_ci)
3113 {
3114 boolean_t fuids_ok;
3115 boolean_t sa_ok;
3116 uint64_t zplver = ZPL_VERSION;
3117 int error;
3118
3119 zplver = zfs_zpl_version_map(spa_vers);
3120 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3121 sa_ok = (zplver >= ZPL_VERSION_SA);
3122
3123 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3124 createprops, zplprops, is_ci);
3125 return (error);
3126 }
3127
3128 /*
3129 * innvl: {
3130 * "type" -> dmu_objset_type_t (int32)
3131 * (optional) "props" -> { prop -> value }
3132 * }
3133 *
3134 * outnvl: propname -> error code (int32)
3135 */
3136 static int
3137 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3138 {
3139 int error = 0;
3140 zfs_creat_t zct = { 0 };
3141 nvlist_t *nvprops = NULL;
3142 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3143 int32_t type32;
3144 dmu_objset_type_t type;
3145 boolean_t is_insensitive = B_FALSE;
3146 char parent[MAXNAMELEN];
3147
3148 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3149 return (EINVAL);
3150 type = type32;
3151 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3152
3153 switch (type) {
3154 case DMU_OST_ZFS:
3155 cbfunc = zfs_create_cb;
3156 break;
3157
3158 case DMU_OST_ZVOL:
3159 cbfunc = zvol_create_cb;
3160 break;
3161
3162 default:
3163 cbfunc = NULL;
3164 break;
3165 }
3166 if (strchr(fsname, '@') ||
3167 strchr(fsname, '%'))
3168 return (EINVAL);
3169
3170 zct.zct_props = nvprops;
3171
3172 if (cbfunc == NULL)
3173 return (EINVAL);
3174
3175 if (zfs_get_parent(fsname, parent, MAXNAMELEN) == 0 &&
3176 zfs_is_wormed(parent)) {
3177 return (EPERM);
3178 }
3179
3180 if (type == DMU_OST_ZVOL) {
3181 uint64_t volsize, volblocksize;
3182
3183 if (nvprops == NULL)
3184 return (EINVAL);
3185 if (nvlist_lookup_uint64(nvprops,
3186 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3187 return (EINVAL);
3188
3189 if ((error = nvlist_lookup_uint64(nvprops,
3190 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3191 &volblocksize)) != 0 && error != ENOENT)
3192 return (EINVAL);
3193
3194 if (error != 0)
3195 volblocksize = zfs_prop_default_numeric(
3196 ZFS_PROP_VOLBLOCKSIZE);
3197
3198 if ((error = zvol_check_volblocksize(
3199 volblocksize)) != 0 ||
3200 (error = zvol_check_volsize(volsize,
3201 volblocksize)) != 0)
3202 return (error);
3203 } else if (type == DMU_OST_ZFS) {
3204 int error;
3205
3206 /*
3207 * We have to have normalization and
3208 * case-folding flags correct when we do the
3209 * file system creation, so go figure them out
3210 * now.
3211 */
3212 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3213 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3214 error = zfs_fill_zplprops(fsname, nvprops,
3215 zct.zct_zplprops, &is_insensitive);
3216 if (error != 0) {
3217 nvlist_free(zct.zct_zplprops);
3218 return (error);
3219 }
3220 }
3221
3222 error = dmu_objset_create(fsname, type,
3223 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3224 nvlist_free(zct.zct_zplprops);
3225
3226 /*
3227 * It would be nice to do this atomically.
3228 */
3229 if (error == 0) {
3230 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3231 nvprops, outnvl);
3232 if (error != 0)
3233 (void) dmu_objset_destroy(fsname, B_FALSE);
3234 }
3235 return (error);
3236 }
3237
3238 /*
3239 * innvl: {
3240 * "origin" -> name of origin snapshot
3241 * (optional) "props" -> { prop -> value }
3242 * }
3243 *
3244 * outnvl: propname -> error code (int32)
3245 */
3246 static int
3247 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3248 {
3249 int error = 0;
3250 nvlist_t *nvprops = NULL;
3251 char *origin_name;
3252 dsl_dataset_t *origin;
3253
3254 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3255 return (EINVAL);
3256 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3257
3258 if (strchr(fsname, '@') ||
3259 strchr(fsname, '%'))
3260 return (EINVAL);
3261
3262 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3263 return (EINVAL);
3264
3265 error = dsl_dataset_hold(origin_name, FTAG, &origin);
3266 if (error)
3267 return (error);
3268
3269 error = dmu_objset_clone(fsname, origin, 0);
3270 dsl_dataset_rele(origin, FTAG);
3271 if (error)
3272 return (error);
3273
3274 /*
3275 * It would be nice to do this atomically.
3276 */
3277 if (error == 0) {
3278 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3279 nvprops, outnvl);
3280 if (error != 0)
3281 (void) dmu_objset_destroy(fsname, B_FALSE);
3282 }
3283 return (error);
3284 }
3285
3286 /*
3287 * innvl: {
3288 * "snaps" -> { snapshot1, snapshot2 }
3289 * (optional) "props" -> { prop -> value (string) }
3290 * }
3291 *
3292 * outnvl: snapshot -> error code (int32)
3293 *
3294 */
3295 static int
3296 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3297 {
3298 nvlist_t *snaps;
3299 nvlist_t *props = NULL;
3300 int error, poollen;
3301 nvpair_t *pair;
3302
3303 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3304 if ((error = zfs_check_userprops(poolname, props)) != 0)
3305 return (error);
3306
3307 if (!nvlist_empty(props) &&
3308 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3309 return (ENOTSUP);
3310
3311 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3312 return (EINVAL);
3313 poollen = strlen(poolname);
3314 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3315 pair = nvlist_next_nvpair(snaps, pair)) {
3316 const char *name = nvpair_name(pair);
3317 const char *cp = strchr(name, '@');
3318
3319 /*
3320 * The snap name must contain an @, and the part after it must
3321 * contain only valid characters.
3322 */
3323 if (cp == NULL || snapshot_namecheck(cp + 1, NULL, NULL) != 0)
3324 return (EINVAL);
3325
3326 /*
3327 * The snap must be in the specified pool.
3328 */
3329 if (strncmp(name, poolname, poollen) != 0 ||
3330 (name[poollen] != '/' && name[poollen] != '@'))
3331 return (EXDEV);
3332
3333 /* This must be the only snap of this fs. */
3334 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3335 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3336 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3337 == 0) {
3338 return (EXDEV);
3339 }
3340 }
3341 }
3342
3343 error = dmu_objset_snapshot(snaps, props, outnvl);
3344 return (error);
3345 }
3346
3347 /*
3348 * innvl: "message" -> string
3349 */
3350 /* ARGSUSED */
3351 static int
3352 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3353 {
3354 char *message;
3355 spa_t *spa;
3356 int error;
3357 char *poolname;
3358
3359 /*
3360 * The poolname in the ioctl is not set, we get it from the TSD,
3361 * which was set at the end of the last successful ioctl that allows
3362 * logging. The secpolicy func already checked that it is set.
3363 * Only one log ioctl is allowed after each successful ioctl, so
3364 * we clear the TSD here.
3365 */
3366 poolname = tsd_get(zfs_allow_log_key);
3367 (void) tsd_set(zfs_allow_log_key, NULL);
3368 error = spa_open(poolname, &spa, FTAG);
3369 strfree(poolname);
3370 if (error != 0)
3371 return (error);
3372
3373 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3374 spa_close(spa, FTAG);
3375 return (EINVAL);
3376 }
3377
3378 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3379 spa_close(spa, FTAG);
3380 return (ENOTSUP);
3381 }
3382
3383 error = spa_history_log(spa, message);
3384 spa_close(spa, FTAG);
3385 return (error);
3386 }
3387
3388 /* ARGSUSED */
3389 int
3390 zfs_unmount_snap(const char *name, void *arg)
3391 {
3392 vfs_t *vfsp;
3393 int err;
3394
3395 if (strchr(name, '@') == NULL)
3396 return (0);
3397
3398 vfsp = zfs_get_vfs(name);
3399 if (vfsp == NULL)
3400 return (0);
3401
3402 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) {
3403 VFS_RELE(vfsp);
3404 return (err);
3405 }
3406 VFS_RELE(vfsp);
3407
3408 /*
3409 * Always force the unmount for snapshots.
3410 */
3411 return (dounmount(vfsp, MS_FORCE, kcred));
3412 }
3413
3414 /*
3415 * innvl: {
3416 * "snaps" -> { snapshot1, snapshot2 }
3417 * (optional boolean) "defer"
3418 * }
3419 *
3420 * outnvl: snapshot -> error code (int32)
3421 *
3422 */
3423 static int
3424 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3425 {
3426 int poollen;
3427 nvlist_t *snaps;
3428 nvpair_t *pair;
3429 boolean_t defer;
3430
3431 if (zfs_is_wormed(poolname))
3432 return (EPERM);
3433
3434 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3435 return (EINVAL);
3436 defer = nvlist_exists(innvl, "defer");
3437
3438 poollen = strlen(poolname);
3439 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3440 pair = nvlist_next_nvpair(snaps, pair)) {
3441 const char *name = nvpair_name(pair);
3442
3443 /*
3444 * The snap must be in the specified pool.
3445 */
3446 if (strncmp(name, poolname, poollen) != 0 ||
3447 (name[poollen] != '/' && name[poollen] != '@'))
3448 return (EXDEV);
3449
3450 /*
3451 * Ignore failures to unmount; dmu_snapshots_destroy_nvl()
3452 * will deal with this gracefully (by filling in outnvl).
3453 */
3454 (void) zfs_unmount_snap(name, NULL);
3455 }
3456
3457 return (dmu_snapshots_destroy_nvl(snaps, defer, outnvl));
3458 }
3459
3460 /*
3461 * inputs:
3462 * zc_name name of dataset to destroy
3463 * zc_objset_type type of objset
3464 * zc_defer_destroy mark for deferred destroy
3465 *
3466 * outputs: none
3467 */
3468 static int
3469 zfs_ioc_destroy(zfs_cmd_t *zc)
3470 {
3471 int err;
3472
3473 if (zfs_is_wormed(zc->zc_name))
3474 return (EPERM);
3475
3476 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) {
3477 err = zfs_unmount_snap(zc->zc_name, NULL);
3478 if (err)
3479 return (err);
3480 }
3481
3482 err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy);
3483 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3484 (void) zvol_remove_minor(zc->zc_name);
3485 return (err);
3486 }
3487
3488 /*
3489 * inputs:
3490 * zc_name name of dataset to rollback (to most recent snapshot)
3491 *
3492 * outputs: none
3493 */
3494 static int
3495 zfs_ioc_rollback(zfs_cmd_t *zc)
3496 {
3497 dsl_dataset_t *ds, *clone;
3498 int error;
3499 zfsvfs_t *zfsvfs;
3500 char *clone_name;
3501
3502 if (zfs_is_wormed(zc->zc_name))
3503 return (EPERM);
3504
3505 error = dsl_dataset_hold(zc->zc_name, FTAG, &ds);
3506 if (error)
3507 return (error);
3508
3509 /* must not be a snapshot */
3510 if (dsl_dataset_is_snapshot(ds)) {
3511 dsl_dataset_rele(ds, FTAG);
3512 return (EINVAL);
3513 }
3514
3515 /* must have a most recent snapshot */
3516 if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) {
3517 dsl_dataset_rele(ds, FTAG);
3518 return (EINVAL);
3519 }
3520
3521 /*
3522 * Create clone of most recent snapshot.
3523 */
3524 clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name);
3525 error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT);
3526 if (error)
3527 goto out;
3528
3529 error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone);
3530 if (error)
3531 goto out;
3532
3533 /*
3534 * Do clone swap.
3535 */
3536 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
3537 error = zfs_suspend_fs(zfsvfs);
3538 if (error == 0) {
3539 int resume_err;
3540
3541 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
3542 error = dsl_dataset_clone_swap(clone, ds,
3543 B_TRUE);
3544 dsl_dataset_disown(ds, FTAG);
3545 ds = NULL;
3546 } else {
3547 error = EBUSY;
3548 }
3549 resume_err = zfs_resume_fs(zfsvfs, zc->zc_name);
3550 error = error ? error : resume_err;
3551 }
3552 VFS_RELE(zfsvfs->z_vfs);
3553 } else {
3554 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
3555 error = dsl_dataset_clone_swap(clone, ds, B_TRUE);
3556 dsl_dataset_disown(ds, FTAG);
3557 ds = NULL;
3558 } else {
3559 error = EBUSY;
3560 }
3561 }
3562
3563 /*
3564 * Destroy clone (which also closes it).
3565 */
3566 (void) dsl_dataset_destroy(clone, FTAG, B_FALSE);
3567
3568 out:
3569 strfree(clone_name);
3570 if (ds)
3571 dsl_dataset_rele(ds, FTAG);
3572 return (error);
3573 }
3574
3575 /*
3576 * inputs:
3577 * zc_name old name of dataset
3578 * zc_value new name of dataset
3579 * zc_cookie recursive flag (only valid for snapshots)
3580 *
3581 * outputs: none
3582 */
3583 static int
3584 zfs_ioc_rename(zfs_cmd_t *zc)
3585 {
3586 boolean_t recursive = zc->zc_cookie & 1;
3587
3588 if (zfs_is_wormed(zc->zc_name))
3589 return (EPERM);
3590
3591 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3592 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3593 strchr(zc->zc_value, '%'))
3594 return (EINVAL);
3595
3596 /*
3597 * Unmount snapshot unless we're doing a recursive rename,
3598 * in which case the dataset code figures out which snapshots
3599 * to unmount.
3600 */
3601 if (!recursive && strchr(zc->zc_name, '@') != NULL &&
3602 zc->zc_objset_type == DMU_OST_ZFS) {
3603 int err = zfs_unmount_snap(zc->zc_name, NULL);
3604 if (err)
3605 return (err);
3606 }
3607 if (zc->zc_objset_type == DMU_OST_ZVOL)
3608 (void) zvol_remove_minor(zc->zc_name);
3609 return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive));
3610 }
3611
3612 static int
3613 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3614 {
3615 const char *propname = nvpair_name(pair);
3616 boolean_t issnap = (strchr(dsname, '@') != NULL);
3617 zfs_prop_t prop = zfs_name_to_prop(propname);
3618 uint64_t intval;
3619 int err;
3620
3621 if (prop == ZPROP_INVAL) {
3622 if (zfs_prop_user(propname)) {
3623 if (err = zfs_secpolicy_write_perms(dsname,
3624 ZFS_DELEG_PERM_USERPROP, cr))
3625 return (err);
3626 return (0);
3627 }
3628
3629 if (!issnap && zfs_prop_userquota(propname)) {
3630 const char *perm = NULL;
3631 const char *uq_prefix =
3632 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3633 const char *gq_prefix =
3634 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3635
3636 if (strncmp(propname, uq_prefix,
3637 strlen(uq_prefix)) == 0) {
3638 perm = ZFS_DELEG_PERM_USERQUOTA;
3639 } else if (strncmp(propname, gq_prefix,
3640 strlen(gq_prefix)) == 0) {
3641 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3642 } else {
3643 /* USERUSED and GROUPUSED are read-only */
3644 return (EINVAL);
3645 }
3646
3647 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3648 return (err);
3649 return (0);
3650 }
3651
3652 return (EINVAL);
3653 }
3654
3655 if (issnap)
3656 return (EINVAL);
3657
3658 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3659 /*
3660 * dsl_prop_get_all_impl() returns properties in this
3661 * format.
3662 */
3663 nvlist_t *attrs;
3664 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3665 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3666 &pair) == 0);
3667 }
3668
3669 /*
3670 * Check that this value is valid for this pool version
3671 */
3672 switch (prop) {
3673 case ZFS_PROP_COMPRESSION:
3674 /*
3675 * If the user specified gzip compression, make sure
3676 * the SPA supports it. We ignore any errors here since
3677 * we'll catch them later.
3678 */
3679 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3680 nvpair_value_uint64(pair, &intval) == 0) {
3681 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3682 intval <= ZIO_COMPRESS_GZIP_9 &&
3683 zfs_earlier_version(dsname,
3684 SPA_VERSION_GZIP_COMPRESSION)) {
3685 return (ENOTSUP);
3686 }
3687
3688 if (intval == ZIO_COMPRESS_ZLE &&
3689 zfs_earlier_version(dsname,
3690 SPA_VERSION_ZLE_COMPRESSION))
3691 return (ENOTSUP);
3692
3693 /*
3694 * If this is a bootable dataset then
3695 * verify that the compression algorithm
3696 * is supported for booting. We must return
3697 * something other than ENOTSUP since it
3698 * implies a downrev pool version.
3699 */
3700 if (zfs_is_bootfs(dsname) &&
3701 !BOOTFS_COMPRESS_VALID(intval)) {
3702 return (ERANGE);
3703 }
3704 }
3705 break;
3706
3707 case ZFS_PROP_COPIES:
3708 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3709 return (ENOTSUP);
3710 break;
3711
3712 case ZFS_PROP_DEDUP:
3713 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3714 return (ENOTSUP);
3715 break;
3716
3717 case ZFS_PROP_SHARESMB:
3718 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3719 return (ENOTSUP);
3720 break;
3721
3722 case ZFS_PROP_ACLINHERIT:
3723 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3724 nvpair_value_uint64(pair, &intval) == 0) {
3725 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3726 zfs_earlier_version(dsname,
3727 SPA_VERSION_PASSTHROUGH_X))
3728 return (ENOTSUP);
3729 }
3730 break;
3731 }
3732
3733 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3734 }
3735
3736 /*
3737 * Removes properties from the given props list that fail permission checks
3738 * needed to clear them and to restore them in case of a receive error. For each
3739 * property, make sure we have both set and inherit permissions.
3740 *
3741 * Returns the first error encountered if any permission checks fail. If the
3742 * caller provides a non-NULL errlist, it also gives the complete list of names
3743 * of all the properties that failed a permission check along with the
3744 * corresponding error numbers. The caller is responsible for freeing the
3745 * returned errlist.
3746 *
3747 * If every property checks out successfully, zero is returned and the list
3748 * pointed at by errlist is NULL.
3749 */
3750 static int
3751 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3752 {
3753 zfs_cmd_t *zc;
3754 nvpair_t *pair, *next_pair;
3755 nvlist_t *errors;
3756 int err, rv = 0;
3757
3758 if (props == NULL)
3759 return (0);
3760
3761 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3762
3763 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3764 (void) strcpy(zc->zc_name, dataset);
3765 pair = nvlist_next_nvpair(props, NULL);
3766 while (pair != NULL) {
3767 next_pair = nvlist_next_nvpair(props, pair);
3768
3769 (void) strcpy(zc->zc_value, nvpair_name(pair));
3770 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3771 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
3772 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3773 VERIFY(nvlist_add_int32(errors,
3774 zc->zc_value, err) == 0);
3775 }
3776 pair = next_pair;
3777 }
3778 kmem_free(zc, sizeof (zfs_cmd_t));
3779
3780 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3781 nvlist_free(errors);
3782 errors = NULL;
3783 } else {
3784 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3785 }
3786
3787 if (errlist == NULL)
3788 nvlist_free(errors);
3789 else
3790 *errlist = errors;
3791
3792 return (rv);
3793 }
3794
3795 static boolean_t
3796 propval_equals(nvpair_t *p1, nvpair_t *p2)
3797 {
3798 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3799 /* dsl_prop_get_all_impl() format */
3800 nvlist_t *attrs;
3801 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3802 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3803 &p1) == 0);
3804 }
3805
3806 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3807 nvlist_t *attrs;
3808 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3809 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3810 &p2) == 0);
3811 }
3812
3813 if (nvpair_type(p1) != nvpair_type(p2))
3814 return (B_FALSE);
3815
3816 if (nvpair_type(p1) == DATA_TYPE_STRING) {
3817 char *valstr1, *valstr2;
3818
3819 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
3820 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
3821 return (strcmp(valstr1, valstr2) == 0);
3822 } else {
3823 uint64_t intval1, intval2;
3824
3825 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
3826 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
3827 return (intval1 == intval2);
3828 }
3829 }
3830
3831 /*
3832 * Remove properties from props if they are not going to change (as determined
3833 * by comparison with origprops). Remove them from origprops as well, since we
3834 * do not need to clear or restore properties that won't change.
3835 */
3836 static void
3837 props_reduce(nvlist_t *props, nvlist_t *origprops)
3838 {
3839 nvpair_t *pair, *next_pair;
3840
3841 if (origprops == NULL)
3842 return; /* all props need to be received */
3843
3844 pair = nvlist_next_nvpair(props, NULL);
3845 while (pair != NULL) {
3846 const char *propname = nvpair_name(pair);
3847 nvpair_t *match;
3848
3849 next_pair = nvlist_next_nvpair(props, pair);
3850
3851 if ((nvlist_lookup_nvpair(origprops, propname,
3852 &match) != 0) || !propval_equals(pair, match))
3853 goto next; /* need to set received value */
3854
3855 /* don't clear the existing received value */
3856 (void) nvlist_remove_nvpair(origprops, match);
3857 /* don't bother receiving the property */
3858 (void) nvlist_remove_nvpair(props, pair);
3859 next:
3860 pair = next_pair;
3861 }
3862 }
3863
3864 #ifdef DEBUG
3865 static boolean_t zfs_ioc_recv_inject_err;
3866 #endif
3867
3868 /*
3869 * inputs:
3870 * zc_name name of containing filesystem
3871 * zc_nvlist_src{_size} nvlist of properties to apply
3872 * zc_value name of snapshot to create
3873 * zc_string name of clone origin (if DRR_FLAG_CLONE)
3874 * zc_cookie file descriptor to recv from
3875 * zc_begin_record the BEGIN record of the stream (not byteswapped)
3876 * zc_guid force flag
3877 * zc_cleanup_fd cleanup-on-exit file descriptor
3878 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
3879 *
3880 * outputs:
3881 * zc_cookie number of bytes read
3882 * zc_nvlist_dst{_size} error for each unapplied received property
3883 * zc_obj zprop_errflags_t
3884 * zc_action_handle handle for this guid/ds mapping
3885 */
3886 static int
3887 zfs_ioc_recv(zfs_cmd_t *zc)
3888 {
3889 file_t *fp;
3890 objset_t *os;
3891 dmu_recv_cookie_t drc;
3892 boolean_t force = (boolean_t)zc->zc_guid;
3893 int fd;
3894 int error = 0;
3895 int props_error = 0;
3896 nvlist_t *errors;
3897 offset_t off;
3898 nvlist_t *props = NULL; /* sent properties */
3899 nvlist_t *origprops = NULL; /* existing properties */
3900 objset_t *origin = NULL;
3901 char *tosnap;
3902 char tofs[ZFS_MAXNAMELEN];
3903 boolean_t first_recvd_props = B_FALSE;
3904
3905 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3906 strchr(zc->zc_value, '@') == NULL ||
3907 strchr(zc->zc_value, '%'))
3908 return (EINVAL);
3909
3910 (void) strcpy(tofs, zc->zc_value);
3911 tosnap = strchr(tofs, '@');
3912 *tosnap++ = '\0';
3913
3914 if (zc->zc_nvlist_src != NULL &&
3915 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
3916 zc->zc_iflags, &props)) != 0)
3917 return (error);
3918
3919 fd = zc->zc_cookie;
3920 fp = getf(fd);
3921 if (fp == NULL) {
3922 nvlist_free(props);
3923 return (EBADF);
3924 }
3925
3926 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3927
3928 if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) {
3929 if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) &&
3930 !dsl_prop_get_hasrecvd(os)) {
3931 first_recvd_props = B_TRUE;
3932 }
3933
3934 /*
3935 * If new received properties are supplied, they are to
3936 * completely replace the existing received properties, so stash
3937 * away the existing ones.
3938 */
3939 if (dsl_prop_get_received(os, &origprops) == 0) {
3940 nvlist_t *errlist = NULL;
3941 /*
3942 * Don't bother writing a property if its value won't
3943 * change (and avoid the unnecessary security checks).
3944 *
3945 * The first receive after SPA_VERSION_RECVD_PROPS is a
3946 * special case where we blow away all local properties
3947 * regardless.
3948 */
3949 if (!first_recvd_props)
3950 props_reduce(props, origprops);
3951 if (zfs_check_clearable(tofs, origprops,
3952 &errlist) != 0)
3953 (void) nvlist_merge(errors, errlist, 0);
3954 nvlist_free(errlist);
3955 }
3956
3957 dmu_objset_rele(os, FTAG);
3958 }
3959
3960 if (zc->zc_string[0]) {
3961 error = dmu_objset_hold(zc->zc_string, FTAG, &origin);
3962 if (error)
3963 goto out;
3964 }
3965
3966 error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds,
3967 &zc->zc_begin_record, force, origin, &drc);
3968 if (origin)
3969 dmu_objset_rele(origin, FTAG);
3970 if (error)
3971 goto out;
3972
3973 /*
3974 * Set properties before we receive the stream so that they are applied
3975 * to the new data. Note that we must call dmu_recv_stream() if
3976 * dmu_recv_begin() succeeds.
3977 */
3978 if (props) {
3979 if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) {
3980 if (drc.drc_newfs) {
3981 if (spa_version(os->os_spa) >=
3982 SPA_VERSION_RECVD_PROPS)
3983 first_recvd_props = B_TRUE;
3984 } else if (origprops != NULL) {
3985 if (clear_received_props(os, tofs, origprops,
3986 first_recvd_props ? NULL : props) != 0)
3987 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
3988 } else {
3989 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
3990 }
3991 dsl_prop_set_hasrecvd(os);
3992 } else if (!drc.drc_newfs) {
3993 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
3994 }
3995
3996 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
3997 props, errors);
3998 }
3999
4000 if (zc->zc_nvlist_dst_size != 0 &&
4001 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4002 put_nvlist(zc, errors) != 0)) {
4003 /*
4004 * Caller made zc->zc_nvlist_dst less than the minimum expected
4005 * size or supplied an invalid address.
4006 */
4007 props_error = EINVAL;
4008 }
4009
4010 off = fp->f_offset;
4011 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4012 &zc->zc_action_handle);
4013
4014 if (error == 0) {
4015 zfsvfs_t *zfsvfs = NULL;
4016
4017 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4018 /* online recv */
4019 int end_err;
4020
4021 error = zfs_suspend_fs(zfsvfs);
4022 /*
4023 * If the suspend fails, then the recv_end will
4024 * likely also fail, and clean up after itself.
4025 */
4026 end_err = dmu_recv_end(&drc);
4027 if (error == 0)
4028 error = zfs_resume_fs(zfsvfs, tofs);
4029 error = error ? error : end_err;
4030 VFS_RELE(zfsvfs->z_vfs);
4031 } else {
4032 error = dmu_recv_end(&drc);
4033 }
4034 }
4035
4036 zc->zc_cookie = off - fp->f_offset;
4037 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4038 fp->f_offset = off;
4039
4040 #ifdef DEBUG
4041 if (zfs_ioc_recv_inject_err) {
4042 zfs_ioc_recv_inject_err = B_FALSE;
4043 error = 1;
4044 }
4045 #endif
4046 /*
4047 * On error, restore the original props.
4048 */
4049 if (error && props) {
4050 if (dmu_objset_hold(tofs, FTAG, &os) == 0) {
4051 if (clear_received_props(os, tofs, props, NULL) != 0) {
4052 /*
4053 * We failed to clear the received properties.
4054 * Since we may have left a $recvd value on the
4055 * system, we can't clear the $hasrecvd flag.
4056 */
4057 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4058 } else if (first_recvd_props) {
4059 dsl_prop_unset_hasrecvd(os);
4060 }
4061 dmu_objset_rele(os, FTAG);
4062 } else if (!drc.drc_newfs) {
4063 /* We failed to clear the received properties. */
4064 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4065 }
4066
4067 if (origprops == NULL && !drc.drc_newfs) {
4068 /* We failed to stash the original properties. */
4069 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4070 }
4071
4072 /*
4073 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4074 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4075 * explictly if we're restoring local properties cleared in the
4076 * first new-style receive.
4077 */
4078 if (origprops != NULL &&
4079 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4080 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4081 origprops, NULL) != 0) {
4082 /*
4083 * We stashed the original properties but failed to
4084 * restore them.
4085 */
4086 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4087 }
4088 }
4089 out:
4090 nvlist_free(props);
4091 nvlist_free(origprops);
4092 nvlist_free(errors);
4093 releasef(fd);
4094
4095 if (error == 0)
4096 error = props_error;
4097
4098 return (error);
4099 }
4100
4101 /*
4102 * inputs:
4103 * zc_name name of snapshot to send
4104 * zc_cookie file descriptor to send stream to
4105 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4106 * zc_sendobj objsetid of snapshot to send
4107 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4108 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4109 * output size in zc_objset_type.
4110 *
4111 * outputs: none
4112 */
4113 static int
4114 zfs_ioc_send(zfs_cmd_t *zc)
4115 {
4116 objset_t *fromsnap = NULL;
4117 objset_t *tosnap;
4118 int error;
4119 offset_t off;
4120 dsl_dataset_t *ds;
4121 dsl_dataset_t *dsfrom = NULL;
4122 spa_t *spa;
4123 dsl_pool_t *dp;
4124 boolean_t estimate = (zc->zc_guid != 0);
4125
4126 error = spa_open(zc->zc_name, &spa, FTAG);
4127 if (error)
4128 return (error);
4129
4130 dp = spa_get_dsl(spa);
4131 rw_enter(&dp->dp_config_rwlock, RW_READER);
4132 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
4133 rw_exit(&dp->dp_config_rwlock);
4134 spa_close(spa, FTAG);
4135 if (error)
4136 return (error);
4137
4138 error = dmu_objset_from_ds(ds, &tosnap);
4139 if (error) {
4140 dsl_dataset_rele(ds, FTAG);
4141 return (error);
4142 }
4143
4144 if (zc->zc_fromobj != 0) {
4145 rw_enter(&dp->dp_config_rwlock, RW_READER);
4146 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &dsfrom);
4147 rw_exit(&dp->dp_config_rwlock);
4148 if (error) {
4149 dsl_dataset_rele(ds, FTAG);
4150 return (error);
4151 }
4152 error = dmu_objset_from_ds(dsfrom, &fromsnap);
4153 if (error) {
4154 dsl_dataset_rele(dsfrom, FTAG);
4155 dsl_dataset_rele(ds, FTAG);
4156 return (error);
4157 }
4158 }
4159
4160 if (zc->zc_obj) {
4161 dsl_pool_t *dp = ds->ds_dir->dd_pool;
4162
4163 if (fromsnap != NULL) {
4164 dsl_dataset_rele(dsfrom, FTAG);
4165 dsl_dataset_rele(ds, FTAG);
4166 return (EINVAL);
4167 }
4168
4169 if (dsl_dir_is_clone(ds->ds_dir)) {
4170 rw_enter(&dp->dp_config_rwlock, RW_READER);
4171 error = dsl_dataset_hold_obj(dp,
4172 ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &dsfrom);
4173 rw_exit(&dp->dp_config_rwlock);
4174 if (error) {
4175 dsl_dataset_rele(ds, FTAG);
4176 return (error);
4177 }
4178 error = dmu_objset_from_ds(dsfrom, &fromsnap);
4179 if (error) {
4180 dsl_dataset_rele(dsfrom, FTAG);
4181 dsl_dataset_rele(ds, FTAG);
4182 return (error);
4183 }
4184 }
4185 }
4186
4187 if (estimate) {
4188 error = dmu_send_estimate(tosnap, fromsnap,
4189 &zc->zc_objset_type);
4190 } else {
4191 offset_t off_starting;
4192 file_t *fp = getf(zc->zc_cookie);
4193 if (fp == NULL) {
4194 dsl_dataset_rele(ds, FTAG);
4195 if (dsfrom)
4196 dsl_dataset_rele(dsfrom, FTAG);
4197 return (EBADF);
4198 }
4199
4200 off = fp->f_offset;
4201 off_starting = off;
4202 error = dmu_send(tosnap, fromsnap, zc->zc_cookie, fp->f_vnode,
4203 &off, zc->zc_sendsize);
4204
4205 zc->zc_sendcounter = off - off_starting;
4206 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4207 fp->f_offset = off;
4208 releasef(zc->zc_cookie);
4209 }
4210 if (dsfrom)
4211 dsl_dataset_rele(dsfrom, FTAG);
4212 dsl_dataset_rele(ds, FTAG);
4213 return (error);
4214 }
4215
4216 /*
4217 * inputs:
4218 * zc_name name of snapshot on which to report progress
4219 * zc_cookie file descriptor of send stream
4220 *
4221 * outputs:
4222 * zc_cookie number of bytes written in send stream thus far
4223 */
4224 static int
4225 zfs_ioc_send_progress(zfs_cmd_t *zc)
4226 {
4227 dsl_dataset_t *ds;
4228 dmu_sendarg_t *dsp = NULL;
4229 int error;
4230
4231 if ((error = dsl_dataset_hold(zc->zc_name, FTAG, &ds)) != 0)
4232 return (error);
4233
4234 mutex_enter(&ds->ds_sendstream_lock);
4235
4236 /*
4237 * Iterate over all the send streams currently active on this dataset.
4238 * If there's one which matches the specified file descriptor _and_ the
4239 * stream was started by the current process, return the progress of
4240 * that stream.
4241 */
4242 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4243 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4244 if (dsp->dsa_outfd == zc->zc_cookie &&
4245 dsp->dsa_proc == curproc)
4246 break;
4247 }
4248
4249 if (dsp != NULL)
4250 zc->zc_cookie = *(dsp->dsa_off);
4251 else
4252 error = ENOENT;
4253
4254 mutex_exit(&ds->ds_sendstream_lock);
4255 dsl_dataset_rele(ds, FTAG);
4256 return (error);
4257 }
4258
4259 static int
4260 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4261 {
4262 int id, error;
4263
4264 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4265 &zc->zc_inject_record);
4266
4267 if (error == 0)
4268 zc->zc_guid = (uint64_t)id;
4269
4270 return (error);
4271 }
4272
4273 static int
4274 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4275 {
4276 return (zio_clear_fault((int)zc->zc_guid));
4277 }
4278
4279 static int
4280 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4281 {
4282 int id = (int)zc->zc_guid;
4283 int error;
4284
4285 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4286 &zc->zc_inject_record);
4287
4288 zc->zc_guid = id;
4289
4290 return (error);
4291 }
4292
4293 static int
4294 zfs_ioc_error_log(zfs_cmd_t *zc)
4295 {
4296 spa_t *spa;
4297 int error;
4298 size_t count = (size_t)zc->zc_nvlist_dst_size;
4299
4300 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4301 return (error);
4302
4303 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4304 &count);
4305 if (error == 0)
4306 zc->zc_nvlist_dst_size = count;
4307 else
4308 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4309
4310 spa_close(spa, FTAG);
4311
4312 return (error);
4313 }
4314
4315 static int
4316 zfs_ioc_clear(zfs_cmd_t *zc)
4317 {
4318 spa_t *spa;
4319 vdev_t *vd;
4320 int error;
4321
4322 /*
4323 * On zpool clear we also fix up missing slogs
4324 */
4325 mutex_enter(&spa_namespace_lock);
4326 spa = spa_lookup(zc->zc_name);
4327 if (spa == NULL) {
4328 mutex_exit(&spa_namespace_lock);
4329 return (EIO);
4330 }
4331 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4332 /* we need to let spa_open/spa_load clear the chains */
4333 spa_set_log_state(spa, SPA_LOG_CLEAR);
4334 }
4335 spa->spa_last_open_failed = 0;
4336 mutex_exit(&spa_namespace_lock);
4337
4338 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4339 error = spa_open(zc->zc_name, &spa, FTAG);
4340 } else {
4341 nvlist_t *policy;
4342 nvlist_t *config = NULL;
4343
4344 if (zc->zc_nvlist_src == NULL)
4345 return (EINVAL);
4346
4347 if ((error = get_nvlist(zc->zc_nvlist_src,
4348 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4349 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4350 policy, &config);
4351 if (config != NULL) {
4352 int err;
4353
4354 if ((err = put_nvlist(zc, config)) != 0)
4355 error = err;
4356 nvlist_free(config);
4357 }
4358 nvlist_free(policy);
4359 }
4360 }
4361
4362 if (error)
4363 return (error);
4364
4365 spa_vdev_state_enter(spa, SCL_NONE);
4366
4367 if (zc->zc_guid == 0) {
4368 vd = NULL;
4369 } else {
4370 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4371 if (vd == NULL) {
4372 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4373 spa_close(spa, FTAG);
4374 return (ENODEV);
4375 }
4376 }
4377
4378 vdev_clear(spa, vd);
4379
4380 (void) spa_vdev_state_exit(spa, NULL, 0);
4381
4382 /*
4383 * Resume any suspended I/Os.
4384 */
4385 if (zio_resume(spa) != 0)
4386 error = EIO;
4387
4388 spa_close(spa, FTAG);
4389
4390 return (error);
4391 }
4392
4393 static int
4394 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4395 {
4396 spa_t *spa;
4397 int error;
4398
4399 error = spa_open(zc->zc_name, &spa, FTAG);
4400 if (error)
4401 return (error);
4402
4403 spa_vdev_state_enter(spa, SCL_NONE);
4404 vdev_reopen(spa->spa_root_vdev);
4405 (void) spa_vdev_state_exit(spa, NULL, 0);
4406 spa_close(spa, FTAG);
4407 return (0);
4408 }
4409 /*
4410 * inputs:
4411 * zc_name name of filesystem
4412 * zc_value name of origin snapshot
4413 *
4414 * outputs:
4415 * zc_string name of conflicting snapshot, if there is one
4416 */
4417 static int
4418 zfs_ioc_promote(zfs_cmd_t *zc)
4419 {
4420 char *cp;
4421
4422 /*
4423 * We don't need to unmount *all* the origin fs's snapshots, but
4424 * it's easier.
4425 */
4426 cp = strchr(zc->zc_value, '@');
4427 if (cp)
4428 *cp = '\0';
4429 (void) dmu_objset_find(zc->zc_value,
4430 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS);
4431 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4432 }
4433
4434 /*
4435 * Retrieve a single {user|group}{used|quota}@... property.
4436 *
4437 * inputs:
4438 * zc_name name of filesystem
4439 * zc_objset_type zfs_userquota_prop_t
4440 * zc_value domain name (eg. "S-1-234-567-89")
4441 * zc_guid RID/UID/GID
4442 *
4443 * outputs:
4444 * zc_cookie property value
4445 */
4446 static int
4447 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4448 {
4449 zfsvfs_t *zfsvfs;
4450 int error;
4451
4452 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4453 return (EINVAL);
4454
4455 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4456 if (error)
4457 return (error);
4458
4459 error = zfs_userspace_one(zfsvfs,
4460 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4461 zfsvfs_rele(zfsvfs, FTAG);
4462
4463 return (error);
4464 }
4465
4466 /*
4467 * inputs:
4468 * zc_name name of filesystem
4469 * zc_cookie zap cursor
4470 * zc_objset_type zfs_userquota_prop_t
4471 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4472 *
4473 * outputs:
4474 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4475 * zc_cookie zap cursor
4476 */
4477 static int
4478 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4479 {
4480 zfsvfs_t *zfsvfs;
4481 int bufsize = zc->zc_nvlist_dst_size;
4482
4483 if (bufsize <= 0)
4484 return (ENOMEM);
4485
4486 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4487 if (error)
4488 return (error);
4489
4490 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4491
4492 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4493 buf, &zc->zc_nvlist_dst_size);
4494
4495 if (error == 0) {
4496 error = xcopyout(buf,
4497 (void *)(uintptr_t)zc->zc_nvlist_dst,
4498 zc->zc_nvlist_dst_size);
4499 }
4500 kmem_free(buf, bufsize);
4501 zfsvfs_rele(zfsvfs, FTAG);
4502
4503 return (error);
4504 }
4505
4506 /*
4507 * inputs:
4508 * zc_name name of filesystem
4509 *
4510 * outputs:
4511 * none
4512 */
4513 static int
4514 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4515 {
4516 objset_t *os;
4517 int error = 0;
4518 zfsvfs_t *zfsvfs;
4519
4520 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4521 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4522 /*
4523 * If userused is not enabled, it may be because the
4524 * objset needs to be closed & reopened (to grow the
4525 * objset_phys_t). Suspend/resume the fs will do that.
4526 */
4527 error = zfs_suspend_fs(zfsvfs);
4528 if (error == 0)
4529 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4530 }
4531 if (error == 0)
4532 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4533 VFS_RELE(zfsvfs->z_vfs);
4534 } else {
4535 /* XXX kind of reading contents without owning */
4536 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4537 if (error)
4538 return (error);
4539
4540 error = dmu_objset_userspace_upgrade(os);
4541 dmu_objset_rele(os, FTAG);
4542 }
4543
4544 return (error);
4545 }
4546
4547 /*
4548 * We don't want to have a hard dependency
4549 * against some special symbols in sharefs
4550 * nfs, and smbsrv. Determine them if needed when
4551 * the first file system is shared.
4552 * Neither sharefs, nfs or smbsrv are unloadable modules.
4553 */
4554 int (*znfsexport_fs)(void *arg);
4555 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4556 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4557
4558 int zfs_nfsshare_inited;
4559 int zfs_smbshare_inited;
4560
4561 ddi_modhandle_t nfs_mod;
4562 ddi_modhandle_t sharefs_mod;
4563 ddi_modhandle_t smbsrv_mod;
4564 kmutex_t zfs_share_lock;
4565
4566 static int
4567 zfs_init_sharefs()
4568 {
4569 int error;
4570
4571 ASSERT(MUTEX_HELD(&zfs_share_lock));
4572 /* Both NFS and SMB shares also require sharetab support. */
4573 if (sharefs_mod == NULL && ((sharefs_mod =
4574 ddi_modopen("fs/sharefs",
4575 KRTLD_MODE_FIRST, &error)) == NULL)) {
4576 return (ENOSYS);
4577 }
4578 if (zshare_fs == NULL && ((zshare_fs =
4579 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4580 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4581 return (ENOSYS);
4582 }
4583 return (0);
4584 }
4585
4586 static int
4587 zfs_ioc_share(zfs_cmd_t *zc)
4588 {
4589 int error;
4590 int opcode;
4591
4592 switch (zc->zc_share.z_sharetype) {
4593 case ZFS_SHARE_NFS:
4594 case ZFS_UNSHARE_NFS:
4595 if (zfs_nfsshare_inited == 0) {
4596 mutex_enter(&zfs_share_lock);
4597 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4598 KRTLD_MODE_FIRST, &error)) == NULL)) {
4599 mutex_exit(&zfs_share_lock);
4600 return (ENOSYS);
4601 }
4602 if (znfsexport_fs == NULL &&
4603 ((znfsexport_fs = (int (*)(void *))
4604 ddi_modsym(nfs_mod,
4605 "nfs_export", &error)) == NULL)) {
4606 mutex_exit(&zfs_share_lock);
4607 return (ENOSYS);
4608 }
4609 error = zfs_init_sharefs();
4610 if (error) {
4611 mutex_exit(&zfs_share_lock);
4612 return (ENOSYS);
4613 }
4614 zfs_nfsshare_inited = 1;
4615 mutex_exit(&zfs_share_lock);
4616 }
4617 break;
4618 case ZFS_SHARE_SMB:
4619 case ZFS_UNSHARE_SMB:
4620 if (zfs_smbshare_inited == 0) {
4621 mutex_enter(&zfs_share_lock);
4622 if (smbsrv_mod == NULL && ((smbsrv_mod =
4623 ddi_modopen("drv/smbsrv",
4624 KRTLD_MODE_FIRST, &error)) == NULL)) {
4625 mutex_exit(&zfs_share_lock);
4626 return (ENOSYS);
4627 }
4628 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4629 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4630 "smb_server_share", &error)) == NULL)) {
4631 mutex_exit(&zfs_share_lock);
4632 return (ENOSYS);
4633 }
4634 error = zfs_init_sharefs();
4635 if (error) {
4636 mutex_exit(&zfs_share_lock);
4637 return (ENOSYS);
4638 }
4639 zfs_smbshare_inited = 1;
4640 mutex_exit(&zfs_share_lock);
4641 }
4642 break;
4643 default:
4644 return (EINVAL);
4645 }
4646
4647 switch (zc->zc_share.z_sharetype) {
4648 case ZFS_SHARE_NFS:
4649 case ZFS_UNSHARE_NFS:
4650 if (error =
4651 znfsexport_fs((void *)
4652 (uintptr_t)zc->zc_share.z_exportdata))
4653 return (error);
4654 break;
4655 case ZFS_SHARE_SMB:
4656 case ZFS_UNSHARE_SMB:
4657 if (error = zsmbexport_fs((void *)
4658 (uintptr_t)zc->zc_share.z_exportdata,
4659 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4660 B_TRUE: B_FALSE)) {
4661 return (error);
4662 }
4663 break;
4664 }
4665
4666 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4667 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4668 SHAREFS_ADD : SHAREFS_REMOVE;
4669
4670 /*
4671 * Add or remove share from sharetab
4672 */
4673 error = zshare_fs(opcode,
4674 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4675 zc->zc_share.z_sharemax);
4676
4677 return (error);
4678
4679 }
4680
4681 ace_t full_access[] = {
4682 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4683 };
4684
4685 /*
4686 * inputs:
4687 * zc_name name of containing filesystem
4688 * zc_obj object # beyond which we want next in-use object #
4689 *
4690 * outputs:
4691 * zc_obj next in-use object #
4692 */
4693 static int
4694 zfs_ioc_next_obj(zfs_cmd_t *zc)
4695 {
4696 objset_t *os = NULL;
4697 int error;
4698
4699 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4700 if (error)
4701 return (error);
4702
4703 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4704 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4705
4706 dmu_objset_rele(os, FTAG);
4707 return (error);
4708 }
4709
4710 /*
4711 * inputs:
4712 * zc_name name of filesystem
4713 * zc_value prefix name for snapshot
4714 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4715 *
4716 * outputs:
4717 * zc_value short name of new snapshot
4718 */
4719 static int
4720 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4721 {
4722 char *snap_name;
4723 int error;
4724
4725 snap_name = kmem_asprintf("%s@%s-%016llx", zc->zc_name, zc->zc_value,
4726 (u_longlong_t)ddi_get_lbolt64());
4727
4728 if (strlen(snap_name) >= MAXPATHLEN) {
4729 strfree(snap_name);
4730 return (E2BIG);
4731 }
4732
4733 error = dmu_objset_snapshot_tmp(snap_name, "%temp", zc->zc_cleanup_fd);
4734 if (error != 0) {
4735 strfree(snap_name);
4736 return (error);
4737 }
4738
4739 (void) strcpy(zc->zc_value, strchr(snap_name, '@') + 1);
4740 strfree(snap_name);
4741 return (0);
4742 }
4743
4744 /*
4745 * inputs:
4746 * zc_name name of "to" snapshot
4747 * zc_value name of "from" snapshot
4748 * zc_cookie file descriptor to write diff data on
4749 *
4750 * outputs:
4751 * dmu_diff_record_t's to the file descriptor
4752 */
4753 static int
4754 zfs_ioc_diff(zfs_cmd_t *zc)
4755 {
4756 objset_t *fromsnap;
4757 objset_t *tosnap;
4758 file_t *fp;
4759 offset_t off;
4760 int error;
4761
4762 error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap);
4763 if (error)
4764 return (error);
4765
4766 error = dmu_objset_hold(zc->zc_value, FTAG, &fromsnap);
4767 if (error) {
4768 dmu_objset_rele(tosnap, FTAG);
4769 return (error);
4770 }
4771
4772 fp = getf(zc->zc_cookie);
4773 if (fp == NULL) {
4774 dmu_objset_rele(fromsnap, FTAG);
4775 dmu_objset_rele(tosnap, FTAG);
4776 return (EBADF);
4777 }
4778
4779 off = fp->f_offset;
4780
4781 error = dmu_diff(tosnap, fromsnap, fp->f_vnode, &off);
4782
4783 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4784 fp->f_offset = off;
4785 releasef(zc->zc_cookie);
4786
4787 dmu_objset_rele(fromsnap, FTAG);
4788 dmu_objset_rele(tosnap, FTAG);
4789 return (error);
4790 }
4791
4792 /*
4793 * Remove all ACL files in shares dir
4794 */
4795 static int
4796 zfs_smb_acl_purge(znode_t *dzp)
4797 {
4798 zap_cursor_t zc;
4799 zap_attribute_t zap;
4800 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4801 int error;
4802
4803 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4804 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4805 zap_cursor_advance(&zc)) {
4806 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4807 NULL, 0)) != 0)
4808 break;
4809 }
4810 zap_cursor_fini(&zc);
4811 return (error);
4812 }
4813
4814 static int
4815 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4816 {
4817 vnode_t *vp;
4818 znode_t *dzp;
4819 vnode_t *resourcevp = NULL;
4820 znode_t *sharedir;
4821 zfsvfs_t *zfsvfs;
4822 nvlist_t *nvlist;
4823 char *src, *target;
4824 vattr_t vattr;
4825 vsecattr_t vsec;
4826 int error = 0;
4827
4828 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4829 NO_FOLLOW, NULL, &vp)) != 0)
4830 return (error);
4831
4832 /* Now make sure mntpnt and dataset are ZFS */
4833
4834 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4835 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4836 zc->zc_name) != 0)) {
4837 VN_RELE(vp);
4838 return (EINVAL);
4839 }
4840
4841 dzp = VTOZ(vp);
4842 zfsvfs = dzp->z_zfsvfs;
4843 ZFS_ENTER(zfsvfs);
4844
4845 /*
4846 * Create share dir if its missing.
4847 */
4848 mutex_enter(&zfsvfs->z_lock);
4849 if (zfsvfs->z_shares_dir == 0) {
4850 dmu_tx_t *tx;
4851
4852 tx = dmu_tx_create(zfsvfs->z_os);
4853 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
4854 ZFS_SHARES_DIR);
4855 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
4856 error = dmu_tx_assign(tx, TXG_WAIT);
4857 if (error) {
4858 dmu_tx_abort(tx);
4859 } else {
4860 error = zfs_create_share_dir(zfsvfs, tx);
4861 dmu_tx_commit(tx);
4862 }
4863 if (error) {
4864 mutex_exit(&zfsvfs->z_lock);
4865 VN_RELE(vp);
4866 ZFS_EXIT(zfsvfs);
4867 return (error);
4868 }
4869 }
4870 mutex_exit(&zfsvfs->z_lock);
4871
4872 ASSERT(zfsvfs->z_shares_dir);
4873 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
4874 VN_RELE(vp);
4875 ZFS_EXIT(zfsvfs);
4876 return (error);
4877 }
4878
4879 switch (zc->zc_cookie) {
4880 case ZFS_SMB_ACL_ADD:
4881 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
4882 vattr.va_type = VREG;
4883 vattr.va_mode = S_IFREG|0777;
4884 vattr.va_uid = 0;
4885 vattr.va_gid = 0;
4886
4887 vsec.vsa_mask = VSA_ACE;
4888 vsec.vsa_aclentp = &full_access;
4889 vsec.vsa_aclentsz = sizeof (full_access);
4890 vsec.vsa_aclcnt = 1;
4891
4892 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
4893 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
4894 if (resourcevp)
4895 VN_RELE(resourcevp);
4896 break;
4897
4898 case ZFS_SMB_ACL_REMOVE:
4899 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
4900 NULL, 0);
4901 break;
4902
4903 case ZFS_SMB_ACL_RENAME:
4904 if ((error = get_nvlist(zc->zc_nvlist_src,
4905 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
4906 VN_RELE(vp);
4907 ZFS_EXIT(zfsvfs);
4908 return (error);
4909 }
4910 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
4911 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
4912 &target)) {
4913 VN_RELE(vp);
4914 VN_RELE(ZTOV(sharedir));
4915 ZFS_EXIT(zfsvfs);
4916 nvlist_free(nvlist);
4917 return (error);
4918 }
4919 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
4920 kcred, NULL, 0);
4921 nvlist_free(nvlist);
4922 break;
4923
4924 case ZFS_SMB_ACL_PURGE:
4925 error = zfs_smb_acl_purge(sharedir);
4926 break;
4927
4928 default:
4929 error = EINVAL;
4930 break;
4931 }
4932
4933 VN_RELE(vp);
4934 VN_RELE(ZTOV(sharedir));
4935
4936 ZFS_EXIT(zfsvfs);
4937
4938 return (error);
4939 }
4940
4941 /*
4942 * inputs:
4943 * zc_name name of filesystem
4944 * zc_value short name of snap
4945 * zc_string user-supplied tag for this hold
4946 * zc_cookie recursive flag
4947 * zc_temphold set if hold is temporary
4948 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4949 * zc_sendobj if non-zero, the objid for zc_name@zc_value
4950 * zc_createtxg if zc_sendobj is non-zero, snap must have zc_createtxg
4951 *
4952 * outputs: none
4953 */
4954 static int
4955 zfs_ioc_hold(zfs_cmd_t *zc)
4956 {
4957 boolean_t recursive = zc->zc_cookie;
4958 spa_t *spa;
4959 dsl_pool_t *dp;
4960 dsl_dataset_t *ds;
4961 int error;
4962 minor_t minor = 0;
4963
4964 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
4965 return (EINVAL);
4966
4967 if (zc->zc_sendobj == 0) {
4968 return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value,
4969 zc->zc_string, recursive, zc->zc_temphold,
4970 zc->zc_cleanup_fd));
4971 }
4972
4973 if (recursive)
4974 return (EINVAL);
4975
4976 error = spa_open(zc->zc_name, &spa, FTAG);
4977 if (error)
4978 return (error);
4979
4980 dp = spa_get_dsl(spa);
4981 rw_enter(&dp->dp_config_rwlock, RW_READER);
4982 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
4983 rw_exit(&dp->dp_config_rwlock);
4984 spa_close(spa, FTAG);
4985 if (error)
4986 return (error);
4987
4988 /*
4989 * Until we have a hold on this snapshot, it's possible that
4990 * zc_sendobj could've been destroyed and reused as part
4991 * of a later txg. Make sure we're looking at the right object.
4992 */
4993 if (zc->zc_createtxg != ds->ds_phys->ds_creation_txg) {
4994 dsl_dataset_rele(ds, FTAG);
4995 return (ENOENT);
4996 }
4997
4998 if (zc->zc_cleanup_fd != -1 && zc->zc_temphold) {
4999 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
5000 if (error) {
5001 dsl_dataset_rele(ds, FTAG);
5002 return (error);
5003 }
5004 }
5005
5006 error = dsl_dataset_user_hold_for_send(ds, zc->zc_string,
5007 zc->zc_temphold);
5008 if (minor != 0) {
5009 if (error == 0) {
5010 dsl_register_onexit_hold_cleanup(ds, zc->zc_string,
5011 minor);
5012 }
5013 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
5014 }
5015 dsl_dataset_rele(ds, FTAG);
5016
5017 return (error);
5018 }
5019
5020 /*
5021 * inputs:
5022 * zc_name name of dataset from which we're releasing a user hold
5023 * zc_value short name of snap
5024 * zc_string user-supplied tag for this hold
5025 * zc_cookie recursive flag
5026 *
5027 * outputs: none
5028 */
5029 static int
5030 zfs_ioc_release(zfs_cmd_t *zc)
5031 {
5032 boolean_t recursive = zc->zc_cookie;
5033
5034 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
5035 return (EINVAL);
5036
5037 return (dsl_dataset_user_release(zc->zc_name, zc->zc_value,
5038 zc->zc_string, recursive));
5039 }
5040
5041 /*
5042 * inputs:
5043 * zc_name name of filesystem
5044 *
5045 * outputs:
5046 * zc_nvlist_src{_size} nvlist of snapshot holds
5047 */
5048 static int
5049 zfs_ioc_get_holds(zfs_cmd_t *zc)
5050 {
5051 nvlist_t *nvp;
5052 int error;
5053
5054 if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) {
5055 error = put_nvlist(zc, nvp);
5056 nvlist_free(nvp);
5057 }
5058
5059 return (error);
5060 }
5061
5062 /*
5063 * inputs:
5064 * zc_name name of new filesystem or snapshot
5065 * zc_value full name of old snapshot
5066 *
5067 * outputs:
5068 * zc_cookie space in bytes
5069 * zc_objset_type compressed space in bytes
5070 * zc_perm_action uncompressed space in bytes
5071 */
5072 static int
5073 zfs_ioc_space_written(zfs_cmd_t *zc)
5074 {
5075 int error;
5076 dsl_dataset_t *new, *old;
5077
5078 error = dsl_dataset_hold(zc->zc_name, FTAG, &new);
5079 if (error != 0)
5080 return (error);
5081 error = dsl_dataset_hold(zc->zc_value, FTAG, &old);
5082 if (error != 0) {
5083 dsl_dataset_rele(new, FTAG);
5084 return (error);
5085 }
5086
5087 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5088 &zc->zc_objset_type, &zc->zc_perm_action);
5089 dsl_dataset_rele(old, FTAG);
5090 dsl_dataset_rele(new, FTAG);
5091 return (error);
5092 }
5093 /*
5094 * innvl: {
5095 * "firstsnap" -> snapshot name
5096 * }
5097 *
5098 * outnvl: {
5099 * "used" -> space in bytes
5100 * "compressed" -> compressed space in bytes
5101 * "uncompressed" -> uncompressed space in bytes
5102 * }
5103 */
5104 static int
5105 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5106 {
5107 int error;
5108 dsl_dataset_t *new, *old;
5109 char *firstsnap;
5110 uint64_t used, comp, uncomp;
5111
5112 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5113 return (EINVAL);
5114
5115 error = dsl_dataset_hold(lastsnap, FTAG, &new);
5116 if (error != 0)
5117 return (error);
5118 error = dsl_dataset_hold(firstsnap, FTAG, &old);
5119 if (error != 0) {
5120 dsl_dataset_rele(new, FTAG);
5121 return (error);
5122 }
5123
5124 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5125 dsl_dataset_rele(old, FTAG);
5126 dsl_dataset_rele(new, FTAG);
5127 fnvlist_add_uint64(outnvl, "used", used);
5128 fnvlist_add_uint64(outnvl, "compressed", comp);
5129 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5130 return (error);
5131 }
5132
5133 /*
5134 * innvl: {
5135 * "fd" -> file descriptor to write stream to (int32)
5136 * (optional) "fromsnap" -> full snap name to send an incremental from
5137 * }
5138 *
5139 * outnvl is unused
5140 */
5141 /* ARGSUSED */
5142 static int
5143 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5144 {
5145 objset_t *fromsnap = NULL;
5146 objset_t *tosnap;
5147 int error;
5148 offset_t off;
5149 char *fromname;
5150 int fd;
5151
5152 error = nvlist_lookup_int32(innvl, "fd", &fd);
5153 if (error != 0)
5154 return (EINVAL);
5155
5156 error = dmu_objset_hold(snapname, FTAG, &tosnap);
5157 if (error)
5158 return (error);
5159
5160 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5161 if (error == 0) {
5162 error = dmu_objset_hold(fromname, FTAG, &fromsnap);
5163 if (error) {
5164 dmu_objset_rele(tosnap, FTAG);
5165 return (error);
5166 }
5167 }
5168
5169 file_t *fp = getf(fd);
5170 if (fp == NULL) {
5171 dmu_objset_rele(tosnap, FTAG);
5172 if (fromsnap != NULL)
5173 dmu_objset_rele(fromsnap, FTAG);
5174 return (EBADF);
5175 }
5176
5177 off = fp->f_offset;
5178 error = dmu_send(tosnap, fromsnap, fd, fp->f_vnode, &off, B_FALSE);
5179
5180 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5181 fp->f_offset = off;
5182 releasef(fd);
5183 if (fromsnap != NULL)
5184 dmu_objset_rele(fromsnap, FTAG);
5185 dmu_objset_rele(tosnap, FTAG);
5186 return (error);
5187 }
5188
5189 /*
5190 * Determine approximately how large a zfs send stream will be -- the number
5191 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5192 *
5193 * innvl: {
5194 * (optional) "fromsnap" -> full snap name to send an incremental from
5195 * }
5196 *
5197 * outnvl: {
5198 * "space" -> bytes of space (uint64)
5199 * }
5200 */
5201 static int
5202 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5203 {
5204 objset_t *fromsnap = NULL;
5205 objset_t *tosnap;
5206 int error;
5207 char *fromname;
5208 uint64_t space;
5209
5210 error = dmu_objset_hold(snapname, FTAG, &tosnap);
5211 if (error)
5212 return (error);
5213
5214 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5215 if (error == 0) {
5216 error = dmu_objset_hold(fromname, FTAG, &fromsnap);
5217 if (error) {
5218 dmu_objset_rele(tosnap, FTAG);
5219 return (error);
5220 }
5221 }
5222
5223 error = dmu_send_estimate(tosnap, fromsnap, &space);
5224 fnvlist_add_uint64(outnvl, "space", space);
5225
5226 if (fromsnap != NULL)
5227 dmu_objset_rele(fromsnap, FTAG);
5228 dmu_objset_rele(tosnap, FTAG);
5229 return (error);
5230 }
5231
5232
5233 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5234
5235 static void
5236 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5237 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5238 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5239 {
5240 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5241
5242 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5243 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5244 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5245 ASSERT3P(vec->zvec_func, ==, NULL);
5246
5247 vec->zvec_legacy_func = func;
5248 vec->zvec_secpolicy = secpolicy;
5249 vec->zvec_namecheck = namecheck;
5250 vec->zvec_allow_log = log_history;
5251 vec->zvec_pool_check = pool_check;
5252 }
5253
5254 /*
5255 * See the block comment at the beginning of this file for details on
5256 * each argument to this function.
5257 */
5258 static void
5259 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5260 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5261 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5262 boolean_t allow_log)
5263 {
5264 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5265
5266 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5267 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5268 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5269 ASSERT3P(vec->zvec_func, ==, NULL);
5270
5271 /* if we are logging, the name must be valid */
5272 ASSERT(!allow_log || namecheck != NO_NAME);
5273
5274 vec->zvec_name = name;
5275 vec->zvec_func = func;
5276 vec->zvec_secpolicy = secpolicy;
5277 vec->zvec_namecheck = namecheck;
5278 vec->zvec_pool_check = pool_check;
5279 vec->zvec_smush_outnvlist = smush_outnvlist;
5280 vec->zvec_allow_log = allow_log;
5281 }
5282
5283 static void
5284 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5285 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5286 zfs_ioc_poolcheck_t pool_check)
5287 {
5288 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5289 POOL_NAME, log_history, pool_check);
5290 }
5291
5292 static void
5293 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5294 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5295 {
5296 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5297 DATASET_NAME, B_FALSE, pool_check);
5298 }
5299
5300 static void
5301 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5302 {
5303 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5304 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5305 }
5306
5307 static void
5308 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5309 zfs_secpolicy_func_t *secpolicy)
5310 {
5311 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5312 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5313 }
5314
5315 static void
5316 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5317 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5318 {
5319 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5320 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5321 }
5322
5323 static void
5324 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5325 {
5326 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5327 zfs_secpolicy_read);
5328 }
5329
5330 static void
5331 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5332 zfs_secpolicy_func_t *secpolicy)
5333 {
5334 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5335 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5336 }
5337
5338 static void
5339 zfs_ioctl_init(void)
5340 {
5341 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5342 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5343 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5344
5345 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5346 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5347 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5348
5349 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5350 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5351 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5352
5353 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5354 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5355 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5356
5357 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5358 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5359 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5360
5361 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5362 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5363 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5364
5365 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5366 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5367 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5368
5369 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5370 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5371 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5372
5373 /* IOCTLS that use the legacy function signature */
5374
5375 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5376 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5377
5378 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5379 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5380 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5381 zfs_ioc_pool_scan);
5382 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5383 zfs_ioc_pool_upgrade);
5384 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5385 zfs_ioc_vdev_add);
5386 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5387 zfs_ioc_vdev_remove);
5388 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5389 zfs_ioc_vdev_set_state);
5390 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5391 zfs_ioc_vdev_attach);
5392 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5393 zfs_ioc_vdev_detach);
5394 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5395 zfs_ioc_vdev_setpath);
5396 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5397 zfs_ioc_vdev_setfru);
5398 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5399 zfs_ioc_pool_set_props);
5400 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5401 zfs_ioc_vdev_split);
5402 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5403 zfs_ioc_pool_reguid);
5404
5405 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5406 zfs_ioc_pool_configs, zfs_secpolicy_none);
5407 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5408 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5409 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5410 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5411 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5412 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5413 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5414 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5415
5416 /*
5417 * pool destroy, and export don't log the history as part of
5418 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5419 * does the logging of those commands.
5420 */
5421 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5422 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5423 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5424 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5425
5426 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5427 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5428 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5429 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5430
5431 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5432 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5433 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5434 zfs_ioc_dsobj_to_dsname,
5435 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5436 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5437 zfs_ioc_pool_get_history,
5438 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5439
5440 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5441 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5442
5443 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5444 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5445 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5446 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5447
5448 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5449 zfs_ioc_space_written);
5450 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_HOLDS,
5451 zfs_ioc_get_holds);
5452 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5453 zfs_ioc_objset_recvd_props);
5454 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5455 zfs_ioc_next_obj);
5456 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5457 zfs_ioc_get_fsacl);
5458 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5459 zfs_ioc_objset_stats);
5460 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5461 zfs_ioc_objset_zplprops);
5462 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5463 zfs_ioc_dataset_list_next);
5464 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5465 zfs_ioc_snapshot_list_next);
5466 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5467 zfs_ioc_send_progress);
5468
5469 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5470 zfs_ioc_diff, zfs_secpolicy_diff);
5471 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5472 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5473 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5474 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5475 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5476 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5477 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5478 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5479 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5480 zfs_ioc_send, zfs_secpolicy_send);
5481
5482 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5483 zfs_secpolicy_none);
5484 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5485 zfs_secpolicy_destroy);
5486 zfs_ioctl_register_dataset_modify(ZFS_IOC_ROLLBACK, zfs_ioc_rollback,
5487 zfs_secpolicy_rollback);
5488 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5489 zfs_secpolicy_rename);
5490 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5491 zfs_secpolicy_recv);
5492 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5493 zfs_secpolicy_promote);
5494 zfs_ioctl_register_dataset_modify(ZFS_IOC_HOLD, zfs_ioc_hold,
5495 zfs_secpolicy_hold);
5496 zfs_ioctl_register_dataset_modify(ZFS_IOC_RELEASE, zfs_ioc_release,
5497 zfs_secpolicy_release);
5498 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5499 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5500 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5501 zfs_secpolicy_set_fsacl);
5502
5503 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5504 zfs_secpolicy_share, POOL_CHECK_NONE);
5505 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5506 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5507 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5508 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5509 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5510 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5511 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5512 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5513 }
5514
5515 int
5516 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5517 zfs_ioc_poolcheck_t check)
5518 {
5519 spa_t *spa;
5520 int error;
5521
5522 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5523
5524 if (check & POOL_CHECK_NONE)
5525 return (0);
5526
5527 error = spa_open(name, &spa, FTAG);
5528 if (error == 0) {
5529 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5530 error = EAGAIN;
5531 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5532 error = EROFS;
5533 spa_close(spa, FTAG);
5534 }
5535 return (error);
5536 }
5537
5538 /*
5539 * Find a free minor number.
5540 */
5541 minor_t
5542 zfsdev_minor_alloc(void)
5543 {
5544 static minor_t last_minor;
5545 minor_t m;
5546
5547 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5548
5549 for (m = last_minor + 1; m != last_minor; m++) {
5550 if (m > ZFSDEV_MAX_MINOR)
5551 m = 1;
5552 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5553 last_minor = m;
5554 return (m);
5555 }
5556 }
5557
5558 return (0);
5559 }
5560
5561 static int
5562 zfs_ctldev_init(dev_t *devp)
5563 {
5564 minor_t minor;
5565 zfs_soft_state_t *zs;
5566
5567 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5568 ASSERT(getminor(*devp) == 0);
5569
5570 minor = zfsdev_minor_alloc();
5571 if (minor == 0)
5572 return (ENXIO);
5573
5574 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5575 return (EAGAIN);
5576
5577 *devp = makedevice(getemajor(*devp), minor);
5578
5579 zs = ddi_get_soft_state(zfsdev_state, minor);
5580 zs->zss_type = ZSST_CTLDEV;
5581 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5582
5583 return (0);
5584 }
5585
5586 static void
5587 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5588 {
5589 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5590
5591 zfs_onexit_destroy(zo);
5592 ddi_soft_state_free(zfsdev_state, minor);
5593 }
5594
5595 void *
5596 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5597 {
5598 zfs_soft_state_t *zp;
5599
5600 zp = ddi_get_soft_state(zfsdev_state, minor);
5601 if (zp == NULL || zp->zss_type != which)
5602 return (NULL);
5603
5604 return (zp->zss_data);
5605 }
5606
5607 static int
5608 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5609 {
5610 int error = 0;
5611
5612 if (getminor(*devp) != 0)
5613 return (zvol_open(devp, flag, otyp, cr));
5614
5615 /* This is the control device. Allocate a new minor if requested. */
5616 if (flag & FEXCL) {
5617 mutex_enter(&zfsdev_state_lock);
5618 error = zfs_ctldev_init(devp);
5619 mutex_exit(&zfsdev_state_lock);
5620 }
5621
5622 return (error);
5623 }
5624
5625 static int
5626 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5627 {
5628 zfs_onexit_t *zo;
5629 minor_t minor = getminor(dev);
5630
5631 if (minor == 0)
5632 return (0);
5633
5634 mutex_enter(&zfsdev_state_lock);
5635 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5636 if (zo == NULL) {
5637 mutex_exit(&zfsdev_state_lock);
5638 return (zvol_close(dev, flag, otyp, cr));
5639 }
5640 zfs_ctldev_destroy(zo, minor);
5641 mutex_exit(&zfsdev_state_lock);
5642
5643 return (0);
5644 }
5645
5646 static int
5647 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5648 {
5649 zfs_cmd_t *zc;
5650 uint_t vecnum;
5651 int error, rc, len;
5652 minor_t minor = getminor(dev);
5653 const zfs_ioc_vec_t *vec;
5654 char *saved_poolname = NULL;
5655 nvlist_t *innvl = NULL;
5656
5657 if (minor != 0 &&
5658 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5659 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5660
5661 vecnum = cmd - ZFS_IOC_FIRST;
5662 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5663
5664 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5665 return (EINVAL);
5666 vec = &zfs_ioc_vec[vecnum];
5667
5668 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5669
5670 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5671 if (error != 0) {
5672 error = EFAULT;
5673 goto out;
5674 }
5675
5676 zc->zc_iflags = flag & FKIOCTL;
5677 if (zc->zc_nvlist_src_size != 0) {
5678 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5679 zc->zc_iflags, &innvl);
5680 if (error != 0)
5681 goto out;
5682 }
5683
5684 /*
5685 * Ensure that all pool/dataset names are valid before we pass down to
5686 * the lower layers.
5687 */
5688 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5689 switch (vec->zvec_namecheck) {
5690 case POOL_NAME:
5691 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5692 error = EINVAL;
5693 else
5694 error = pool_status_check(zc->zc_name,
5695 vec->zvec_namecheck, vec->zvec_pool_check);
5696 break;
5697
5698 case DATASET_NAME:
5699 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5700 error = EINVAL;
5701 else
5702 error = pool_status_check(zc->zc_name,
5703 vec->zvec_namecheck, vec->zvec_pool_check);
5704 break;
5705
5706 case NO_NAME:
5707 break;
5708 }
5709
5710
5711 if (error == 0 && !(flag & FKIOCTL))
5712 error = vec->zvec_secpolicy(zc, innvl, cr);
5713
5714 if (error != 0)
5715 goto out;
5716
5717 /* legacy ioctls can modify zc_name */
5718 len = strcspn(zc->zc_name, "/@") + 1;
5719 saved_poolname = kmem_alloc(len, KM_SLEEP);
5720 (void) strlcpy(saved_poolname, zc->zc_name, len);
5721
5722 if (vec->zvec_func != NULL) {
5723 nvlist_t *outnvl;
5724 int puterror = 0;
5725 spa_t *spa;
5726 nvlist_t *lognv = NULL;
5727
5728 ASSERT(vec->zvec_legacy_func == NULL);
5729
5730 /*
5731 * Add the innvl to the lognv before calling the func,
5732 * in case the func changes the innvl.
5733 */
5734 if (vec->zvec_allow_log) {
5735 lognv = fnvlist_alloc();
5736 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
5737 vec->zvec_name);
5738 if (!nvlist_empty(innvl)) {
5739 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
5740 innvl);
5741 }
5742 }
5743
5744 outnvl = fnvlist_alloc();
5745 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
5746
5747 if (error == 0 && vec->zvec_allow_log &&
5748 spa_open(zc->zc_name, &spa, FTAG) == 0) {
5749 if (!nvlist_empty(outnvl)) {
5750 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
5751 outnvl);
5752 }
5753 (void) spa_history_log_nvl(spa, lognv);
5754 spa_close(spa, FTAG);
5755 }
5756 fnvlist_free(lognv);
5757
5758 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
5759 int smusherror = 0;
5760 if (vec->zvec_smush_outnvlist) {
5761 smusherror = nvlist_smush(outnvl,
5762 zc->zc_nvlist_dst_size);
5763 }
5764 if (smusherror == 0)
5765 puterror = put_nvlist(zc, outnvl);
5766 }
5767
5768 if (puterror != 0)
5769 error = puterror;
5770
5771 nvlist_free(outnvl);
5772 } else {
5773 error = vec->zvec_legacy_func(zc);
5774 }
5775
5776 out:
5777 nvlist_free(innvl);
5778 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5779 if (error == 0 && rc != 0)
5780 error = EFAULT;
5781 if (error == 0 && vec->zvec_allow_log) {
5782 char *s = tsd_get(zfs_allow_log_key);
5783 if (s != NULL)
5784 strfree(s);
5785 (void) tsd_set(zfs_allow_log_key, saved_poolname);
5786 } else {
5787 if (saved_poolname != NULL)
5788 strfree(saved_poolname);
5789 }
5790
5791 kmem_free(zc, sizeof (zfs_cmd_t));
5792 return (error);
5793 }
5794
5795 static int
5796 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5797 {
5798 if (cmd != DDI_ATTACH)
5799 return (DDI_FAILURE);
5800
5801 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5802 DDI_PSEUDO, 0) == DDI_FAILURE)
5803 return (DDI_FAILURE);
5804
5805 zfs_dip = dip;
5806
5807 ddi_report_dev(dip);
5808
5809 return (DDI_SUCCESS);
5810 }
5811
5812 static int
5813 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5814 {
5815 if (spa_busy() || zfs_busy() || zvol_busy())
5816 return (DDI_FAILURE);
5817
5818 if (cmd != DDI_DETACH)
5819 return (DDI_FAILURE);
5820
5821 zfs_dip = NULL;
5822
5823 ddi_prop_remove_all(dip);
5824 ddi_remove_minor_node(dip, NULL);
5825
5826 return (DDI_SUCCESS);
5827 }
5828
5829 /*ARGSUSED*/
5830 static int
5831 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5832 {
5833 switch (infocmd) {
5834 case DDI_INFO_DEVT2DEVINFO:
5835 *result = zfs_dip;
5836 return (DDI_SUCCESS);
5837
5838 case DDI_INFO_DEVT2INSTANCE:
5839 *result = (void *)0;
5840 return (DDI_SUCCESS);
5841 }
5842
5843 return (DDI_FAILURE);
5844 }
5845
5846 /*
5847 * OK, so this is a little weird.
5848 *
5849 * /dev/zfs is the control node, i.e. minor 0.
5850 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5851 *
5852 * /dev/zfs has basically nothing to do except serve up ioctls,
5853 * so most of the standard driver entry points are in zvol.c.
5854 */
5855 static struct cb_ops zfs_cb_ops = {
5856 zfsdev_open, /* open */
5857 zfsdev_close, /* close */
5858 zvol_strategy, /* strategy */
5859 nodev, /* print */
5860 zvol_dump, /* dump */
5861 zvol_read, /* read */
5862 zvol_write, /* write */
5863 zfsdev_ioctl, /* ioctl */
5864 nodev, /* devmap */
5865 nodev, /* mmap */
5866 nodev, /* segmap */
5867 nochpoll, /* poll */
5868 ddi_prop_op, /* prop_op */
5869 NULL, /* streamtab */
5870 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
5871 CB_REV, /* version */
5872 nodev, /* async read */
5873 nodev, /* async write */
5874 };
5875
5876 static struct dev_ops zfs_dev_ops = {
5877 DEVO_REV, /* version */
5878 0, /* refcnt */
5879 zfs_info, /* info */
5880 nulldev, /* identify */
5881 nulldev, /* probe */
5882 zfs_attach, /* attach */
5883 zfs_detach, /* detach */
5884 nodev, /* reset */
5885 &zfs_cb_ops, /* driver operations */
5886 NULL, /* no bus operations */
5887 NULL, /* power */
5888 ddi_quiesce_not_needed, /* quiesce */
5889 };
5890
5891 static struct modldrv zfs_modldrv = {
5892 &mod_driverops,
5893 "ZFS storage pool",
5894 &zfs_dev_ops
5895 };
5896
5897 static struct modlinkage modlinkage = {
5898 MODREV_1,
5899 (void *)&zfs_modlfs,
5900 (void *)&zfs_modldrv,
5901 NULL
5902 };
5903
5904 static void
5905 zfs_allow_log_destroy(void *arg)
5906 {
5907 char *poolname = arg;
5908 strfree(poolname);
5909 }
5910
5911 int
5912 _init(void)
5913 {
5914 int error;
5915
5916 spa_init(FREAD | FWRITE);
5917 zfs_init();
5918 zvol_init();
5919 zfs_ioctl_init();
5920
5921 if ((error = mod_install(&modlinkage)) != 0) {
5922 zvol_fini();
5923 zfs_fini();
5924 spa_fini();
5925 return (error);
5926 }
5927
5928 tsd_create(&zfs_fsyncer_key, NULL);
5929 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
5930 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
5931
5932 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
5933 ASSERT(error == 0);
5934 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
5935
5936 return (0);
5937 }
5938
5939 int
5940 _fini(void)
5941 {
5942 int error;
5943
5944 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
5945 return (EBUSY);
5946
5947 if ((error = mod_remove(&modlinkage)) != 0)
5948 return (error);
5949
5950 zvol_fini();
5951 zfs_fini();
5952 spa_fini();
5953 if (zfs_nfsshare_inited)
5954 (void) ddi_modclose(nfs_mod);
5955 if (zfs_smbshare_inited)
5956 (void) ddi_modclose(smbsrv_mod);
5957 if (zfs_nfsshare_inited || zfs_smbshare_inited)
5958 (void) ddi_modclose(sharefs_mod);
5959
5960 tsd_destroy(&zfs_fsyncer_key);
5961 ldi_ident_release(zfs_li);
5962 zfs_li = NULL;
5963 mutex_destroy(&zfs_share_lock);
5964
5965 return (error);
5966 }
5967
5968 int
5969 _info(struct modinfo *modinfop)
5970 {
5971 return (mod_info(&modlinkage, modinfop));
5972 }