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 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Portions Copyright 2011 Martin Matuska
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2012 by Delphix. All rights reserved.
26 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
27 */
28
29 #include <sys/types.h>
30 #include <sys/param.h>
31 #include <sys/errno.h>
32 #include <sys/uio.h>
33 #include <sys/buf.h>
34 #include <sys/modctl.h>
35 #include <sys/open.h>
36 #include <sys/file.h>
37 #include <sys/kmem.h>
38 #include <sys/conf.h>
39 #include <sys/cmn_err.h>
40 #include <sys/stat.h>
41 #include <sys/zfs_ioctl.h>
42 #include <sys/zfs_vfsops.h>
43 #include <sys/zfs_znode.h>
44 #include <sys/zap.h>
45 #include <sys/spa.h>
46 #include <sys/spa_impl.h>
47 #include <sys/vdev.h>
48 #include <sys/priv_impl.h>
49 #include <sys/dmu.h>
50 #include <sys/dsl_dir.h>
51 #include <sys/dsl_dataset.h>
52 #include <sys/dsl_prop.h>
53 #include <sys/dsl_deleg.h>
54 #include <sys/dmu_objset.h>
55 #include <sys/dmu_impl.h>
56 #include <sys/ddi.h>
57 #include <sys/sunddi.h>
58 #include <sys/sunldi.h>
59 #include <sys/policy.h>
60 #include <sys/zone.h>
61 #include <sys/nvpair.h>
62 #include <sys/pathname.h>
63 #include <sys/mount.h>
64 #include <sys/sdt.h>
65 #include <sys/fs/zfs.h>
66 #include <sys/zfs_ctldir.h>
67 #include <sys/zfs_dir.h>
68 #include <sys/zfs_onexit.h>
69 #include <sys/zvol.h>
70 #include <sys/dsl_scan.h>
71 #include <sharefs/share.h>
72 #include <sys/dmu_objset.h>
73
74 #include "zfs_namecheck.h"
75 #include "zfs_prop.h"
76 #include "zfs_deleg.h"
77 #include "zfs_comutil.h"
78
79 extern struct modlfs zfs_modlfs;
80
81 extern void zfs_init(void);
82 extern void zfs_fini(void);
83
84 ldi_ident_t zfs_li = NULL;
85 dev_info_t *zfs_dip;
86
87 typedef int zfs_ioc_func_t(zfs_cmd_t *);
88 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, cred_t *);
89
90 typedef enum {
91 NO_NAME,
92 POOL_NAME,
93 DATASET_NAME
94 } zfs_ioc_namecheck_t;
95
96 typedef enum {
97 POOL_CHECK_NONE = 1 << 0,
98 POOL_CHECK_SUSPENDED = 1 << 1,
99 POOL_CHECK_READONLY = 1 << 2
100 } zfs_ioc_poolcheck_t;
101
102 typedef struct zfs_ioc_vec {
103 zfs_ioc_func_t *zvec_func;
104 zfs_secpolicy_func_t *zvec_secpolicy;
105 zfs_ioc_namecheck_t zvec_namecheck;
106 boolean_t zvec_his_log;
107 zfs_ioc_poolcheck_t zvec_pool_check;
108 } zfs_ioc_vec_t;
109
110 /* This array is indexed by zfs_userquota_prop_t */
111 static const char *userquota_perms[] = {
112 ZFS_DELEG_PERM_USERUSED,
113 ZFS_DELEG_PERM_USERQUOTA,
114 ZFS_DELEG_PERM_GROUPUSED,
115 ZFS_DELEG_PERM_GROUPQUOTA,
116 };
117
118 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
119 static int zfs_check_settable(const char *name, nvpair_t *property,
120 cred_t *cr);
121 static int zfs_check_clearable(char *dataset, nvlist_t *props,
122 nvlist_t **errors);
123 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
124 boolean_t *);
125 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t **);
126
127 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
128 void
129 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
130 {
131 const char *newfile;
132 char buf[512];
133 va_list adx;
134
135 /*
136 * Get rid of annoying "../common/" prefix to filename.
137 */
138 newfile = strrchr(file, '/');
139 if (newfile != NULL) {
140 newfile = newfile + 1; /* Get rid of leading / */
141 } else {
142 newfile = file;
143 }
144
145 va_start(adx, fmt);
146 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
147 va_end(adx);
148
149 /*
150 * To get this data, use the zfs-dprintf probe as so:
151 * dtrace -q -n 'zfs-dprintf \
152 * /stringof(arg0) == "dbuf.c"/ \
153 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
154 * arg0 = file name
155 * arg1 = function name
156 * arg2 = line number
157 * arg3 = message
158 */
159 DTRACE_PROBE4(zfs__dprintf,
160 char *, newfile, char *, func, int, line, char *, buf);
161 }
162
163 static void
164 history_str_free(char *buf)
165 {
166 kmem_free(buf, HIS_MAX_RECORD_LEN);
167 }
168
169 static char *
170 history_str_get(zfs_cmd_t *zc)
171 {
172 char *buf;
173
174 if (zc->zc_history == NULL)
175 return (NULL);
176
177 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
178 if (copyinstr((void *)(uintptr_t)zc->zc_history,
179 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
180 history_str_free(buf);
181 return (NULL);
182 }
183
184 buf[HIS_MAX_RECORD_LEN -1] = '\0';
185
186 return (buf);
187 }
188
189 /*
190 * Check to see if the named dataset is currently defined as bootable
191 */
192 static boolean_t
193 zfs_is_bootfs(const char *name)
194 {
195 objset_t *os;
196
197 if (dmu_objset_hold(name, FTAG, &os) == 0) {
198 boolean_t ret;
199 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
200 dmu_objset_rele(os, FTAG);
201 return (ret);
202 }
203 return (B_FALSE);
204 }
205
206 /*
207 * zfs_earlier_version
208 *
209 * Return non-zero if the spa version is less than requested version.
210 */
211 static int
212 zfs_earlier_version(const char *name, int version)
213 {
214 spa_t *spa;
215
216 if (spa_open(name, &spa, FTAG) == 0) {
217 if (spa_version(spa) < version) {
218 spa_close(spa, FTAG);
219 return (1);
220 }
221 spa_close(spa, FTAG);
222 }
223 return (0);
224 }
225
226 /*
227 * zpl_earlier_version
228 *
229 * Return TRUE if the ZPL version is less than requested version.
230 */
231 static boolean_t
232 zpl_earlier_version(const char *name, int version)
233 {
234 objset_t *os;
235 boolean_t rc = B_TRUE;
236
237 if (dmu_objset_hold(name, FTAG, &os) == 0) {
238 uint64_t zplversion;
239
240 if (dmu_objset_type(os) != DMU_OST_ZFS) {
241 dmu_objset_rele(os, FTAG);
242 return (B_TRUE);
243 }
244 /* XXX reading from non-owned objset */
245 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
246 rc = zplversion < version;
247 dmu_objset_rele(os, FTAG);
248 }
249 return (rc);
250 }
251
252 static void
253 zfs_log_history(zfs_cmd_t *zc)
254 {
255 spa_t *spa;
256 char *buf;
257
258 if ((buf = history_str_get(zc)) == NULL)
259 return;
260
261 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
262 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
263 (void) spa_history_log(spa, buf, LOG_CMD_NORMAL);
264 spa_close(spa, FTAG);
265 }
266 history_str_free(buf);
267 }
268
269 /*
270 * Policy for top-level read operations (list pools). Requires no privileges,
271 * and can be used in the local zone, as there is no associated dataset.
272 */
273 /* ARGSUSED */
274 static int
275 zfs_secpolicy_none(zfs_cmd_t *zc, cred_t *cr)
276 {
277 return (0);
278 }
279
280 /*
281 * Policy for dataset read operations (list children, get statistics). Requires
282 * no privileges, but must be visible in the local zone.
283 */
284 /* ARGSUSED */
285 static int
286 zfs_secpolicy_read(zfs_cmd_t *zc, cred_t *cr)
287 {
288 if (INGLOBALZONE(curproc) ||
289 zone_dataset_visible(zc->zc_name, NULL))
290 return (0);
291
292 return (ENOENT);
293 }
294
295 static int
296 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
297 {
298 int writable = 1;
299
300 /*
301 * The dataset must be visible by this zone -- check this first
302 * so they don't see EPERM on something they shouldn't know about.
303 */
304 if (!INGLOBALZONE(curproc) &&
305 !zone_dataset_visible(dataset, &writable))
306 return (ENOENT);
307
308 if (INGLOBALZONE(curproc)) {
309 /*
310 * If the fs is zoned, only root can access it from the
311 * global zone.
312 */
313 if (secpolicy_zfs(cr) && zoned)
314 return (EPERM);
315 } else {
316 /*
317 * If we are in a local zone, the 'zoned' property must be set.
318 */
319 if (!zoned)
320 return (EPERM);
321
322 /* must be writable by this zone */
323 if (!writable)
324 return (EPERM);
325 }
326 return (0);
327 }
328
329 static int
330 zfs_dozonecheck(const char *dataset, cred_t *cr)
331 {
332 uint64_t zoned;
333
334 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
335 return (ENOENT);
336
337 return (zfs_dozonecheck_impl(dataset, zoned, cr));
338 }
339
340 static int
341 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
342 {
343 uint64_t zoned;
344
345 rw_enter(&ds->ds_dir->dd_pool->dp_config_rwlock, RW_READER);
346 if (dsl_prop_get_ds(ds, "zoned", 8, 1, &zoned, NULL)) {
347 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
348 return (ENOENT);
349 }
350 rw_exit(&ds->ds_dir->dd_pool->dp_config_rwlock);
351
352 return (zfs_dozonecheck_impl(dataset, zoned, cr));
353 }
354
355 /*
356 * If name ends in a '@', then require recursive permissions.
357 */
358 int
359 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
360 {
361 int error;
362 boolean_t descendent = B_FALSE;
363 dsl_dataset_t *ds;
364 char *at;
365
366 at = strchr(name, '@');
367 if (at != NULL && at[1] == '\0') {
368 *at = '\0';
369 descendent = B_TRUE;
370 }
371
372 error = dsl_dataset_hold(name, FTAG, &ds);
373 if (at != NULL)
374 *at = '@';
375 if (error != 0)
376 return (error);
377
378 error = zfs_dozonecheck_ds(name, ds, cr);
379 if (error == 0) {
380 error = secpolicy_zfs(cr);
381 if (error)
382 error = dsl_deleg_access_impl(ds, descendent, perm, cr);
383 }
384
385 dsl_dataset_rele(ds, FTAG);
386 return (error);
387 }
388
389 int
390 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
391 const char *perm, cred_t *cr)
392 {
393 int error;
394
395 error = zfs_dozonecheck_ds(name, ds, cr);
396 if (error == 0) {
397 error = secpolicy_zfs(cr);
398 if (error)
399 error = dsl_deleg_access_impl(ds, B_FALSE, perm, cr);
400 }
401 return (error);
402 }
403
404 /*
405 * Policy for setting the security label property.
406 *
407 * Returns 0 for success, non-zero for access and other errors.
408 */
409 static int
410 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
411 {
412 char ds_hexsl[MAXNAMELEN];
413 bslabel_t ds_sl, new_sl;
414 boolean_t new_default = FALSE;
415 uint64_t zoned;
416 int needed_priv = -1;
417 int error;
418
419 /* First get the existing dataset label. */
420 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
421 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
422 if (error)
423 return (EPERM);
424
425 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
426 new_default = TRUE;
427
428 /* The label must be translatable */
429 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
430 return (EINVAL);
431
432 /*
433 * In a non-global zone, disallow attempts to set a label that
434 * doesn't match that of the zone; otherwise no other checks
435 * are needed.
436 */
437 if (!INGLOBALZONE(curproc)) {
438 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
439 return (EPERM);
440 return (0);
441 }
442
443 /*
444 * For global-zone datasets (i.e., those whose zoned property is
445 * "off", verify that the specified new label is valid for the
446 * global zone.
447 */
448 if (dsl_prop_get_integer(name,
449 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
450 return (EPERM);
451 if (!zoned) {
452 if (zfs_check_global_label(name, strval) != 0)
453 return (EPERM);
454 }
455
456 /*
457 * If the existing dataset label is nondefault, check if the
458 * dataset is mounted (label cannot be changed while mounted).
459 * Get the zfsvfs; if there isn't one, then the dataset isn't
460 * mounted (or isn't a dataset, doesn't exist, ...).
461 */
462 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
463 objset_t *os;
464 static char *setsl_tag = "setsl_tag";
465
466 /*
467 * Try to own the dataset; abort if there is any error,
468 * (e.g., already mounted, in use, or other error).
469 */
470 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
471 setsl_tag, &os);
472 if (error)
473 return (EPERM);
474
475 dmu_objset_disown(os, setsl_tag);
476
477 if (new_default) {
478 needed_priv = PRIV_FILE_DOWNGRADE_SL;
479 goto out_check;
480 }
481
482 if (hexstr_to_label(strval, &new_sl) != 0)
483 return (EPERM);
484
485 if (blstrictdom(&ds_sl, &new_sl))
486 needed_priv = PRIV_FILE_DOWNGRADE_SL;
487 else if (blstrictdom(&new_sl, &ds_sl))
488 needed_priv = PRIV_FILE_UPGRADE_SL;
489 } else {
490 /* dataset currently has a default label */
491 if (!new_default)
492 needed_priv = PRIV_FILE_UPGRADE_SL;
493 }
494
495 out_check:
496 if (needed_priv != -1)
497 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
498 return (0);
499 }
500
501 static int
502 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
503 cred_t *cr)
504 {
505 char *strval;
506
507 /*
508 * Check permissions for special properties.
509 */
510 switch (prop) {
511 case ZFS_PROP_ZONED:
512 /*
513 * Disallow setting of 'zoned' from within a local zone.
514 */
515 if (!INGLOBALZONE(curproc))
516 return (EPERM);
517 break;
518
519 case ZFS_PROP_QUOTA:
520 if (!INGLOBALZONE(curproc)) {
521 uint64_t zoned;
522 char setpoint[MAXNAMELEN];
523 /*
524 * Unprivileged users are allowed to modify the
525 * quota on things *under* (ie. contained by)
526 * the thing they own.
527 */
528 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
529 setpoint))
530 return (EPERM);
531 if (!zoned || strlen(dsname) <= strlen(setpoint))
532 return (EPERM);
533 }
534 break;
535
536 case ZFS_PROP_MLSLABEL:
537 if (!is_system_labeled())
538 return (EPERM);
539
540 if (nvpair_value_string(propval, &strval) == 0) {
541 int err;
542
543 err = zfs_set_slabel_policy(dsname, strval, CRED());
544 if (err != 0)
545 return (err);
546 }
547 break;
548 }
549
550 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
551 }
552
553 int
554 zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr)
555 {
556 int error;
557
558 error = zfs_dozonecheck(zc->zc_name, cr);
559 if (error)
560 return (error);
561
562 /*
563 * permission to set permissions will be evaluated later in
564 * dsl_deleg_can_allow()
565 */
566 return (0);
567 }
568
569 int
570 zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr)
571 {
572 return (zfs_secpolicy_write_perms(zc->zc_name,
573 ZFS_DELEG_PERM_ROLLBACK, cr));
574 }
575
576 int
577 zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr)
578 {
579 spa_t *spa;
580 dsl_pool_t *dp;
581 dsl_dataset_t *ds;
582 char *cp;
583 int error;
584
585 /*
586 * Generate the current snapshot name from the given objsetid, then
587 * use that name for the secpolicy/zone checks.
588 */
589 cp = strchr(zc->zc_name, '@');
590 if (cp == NULL)
591 return (EINVAL);
592 error = spa_open(zc->zc_name, &spa, FTAG);
593 if (error)
594 return (error);
595
596 dp = spa_get_dsl(spa);
597 rw_enter(&dp->dp_config_rwlock, RW_READER);
598 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
599 rw_exit(&dp->dp_config_rwlock);
600 spa_close(spa, FTAG);
601 if (error)
602 return (error);
603
604 dsl_dataset_name(ds, zc->zc_name);
605
606 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
607 ZFS_DELEG_PERM_SEND, cr);
608 dsl_dataset_rele(ds, FTAG);
609
610 return (error);
611 }
612
613 static int
614 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, cred_t *cr)
615 {
616 vnode_t *vp;
617 int error;
618
619 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
620 NO_FOLLOW, NULL, &vp)) != 0)
621 return (error);
622
623 /* Now make sure mntpnt and dataset are ZFS */
624
625 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
626 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
627 zc->zc_name) != 0)) {
628 VN_RELE(vp);
629 return (EPERM);
630 }
631
632 VN_RELE(vp);
633 return (dsl_deleg_access(zc->zc_name,
634 ZFS_DELEG_PERM_SHARE, cr));
635 }
636
637 int
638 zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr)
639 {
640 if (!INGLOBALZONE(curproc))
641 return (EPERM);
642
643 if (secpolicy_nfs(cr) == 0) {
644 return (0);
645 } else {
646 return (zfs_secpolicy_deleg_share(zc, cr));
647 }
648 }
649
650 int
651 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, cred_t *cr)
652 {
653 if (!INGLOBALZONE(curproc))
654 return (EPERM);
655
656 if (secpolicy_smb(cr) == 0) {
657 return (0);
658 } else {
659 return (zfs_secpolicy_deleg_share(zc, cr));
660 }
661 }
662
663 static int
664 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
665 {
666 char *cp;
667
668 /*
669 * Remove the @bla or /bla from the end of the name to get the parent.
670 */
671 (void) strncpy(parent, datasetname, parentsize);
672 cp = strrchr(parent, '@');
673 if (cp != NULL) {
674 cp[0] = '\0';
675 } else {
676 cp = strrchr(parent, '/');
677 if (cp == NULL)
678 return (ENOENT);
679 cp[0] = '\0';
680 }
681
682 return (0);
683 }
684
685 int
686 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
687 {
688 int error;
689
690 if ((error = zfs_secpolicy_write_perms(name,
691 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
692 return (error);
693
694 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
695 }
696
697 static int
698 zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr)
699 {
700 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
701 }
702
703 /*
704 * Destroying snapshots with delegated permissions requires
705 * descendent mount and destroy permissions.
706 */
707 static int
708 zfs_secpolicy_destroy_recursive(zfs_cmd_t *zc, cred_t *cr)
709 {
710 int error;
711 char *dsname;
712
713 dsname = kmem_asprintf("%s@", zc->zc_name);
714
715 error = zfs_secpolicy_destroy_perms(dsname, cr);
716
717 strfree(dsname);
718 return (error);
719 }
720
721 int
722 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
723 {
724 char parentname[MAXNAMELEN];
725 int error;
726
727 if ((error = zfs_secpolicy_write_perms(from,
728 ZFS_DELEG_PERM_RENAME, cr)) != 0)
729 return (error);
730
731 if ((error = zfs_secpolicy_write_perms(from,
732 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
733 return (error);
734
735 if ((error = zfs_get_parent(to, parentname,
736 sizeof (parentname))) != 0)
737 return (error);
738
739 if ((error = zfs_secpolicy_write_perms(parentname,
740 ZFS_DELEG_PERM_CREATE, cr)) != 0)
741 return (error);
742
743 if ((error = zfs_secpolicy_write_perms(parentname,
744 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
745 return (error);
746
747 return (error);
748 }
749
750 static int
751 zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr)
752 {
753 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
754 }
755
756 static int
757 zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr)
758 {
759 char parentname[MAXNAMELEN];
760 objset_t *clone;
761 int error;
762
763 error = zfs_secpolicy_write_perms(zc->zc_name,
764 ZFS_DELEG_PERM_PROMOTE, cr);
765 if (error)
766 return (error);
767
768 error = dmu_objset_hold(zc->zc_name, FTAG, &clone);
769
770 if (error == 0) {
771 dsl_dataset_t *pclone = NULL;
772 dsl_dir_t *dd;
773 dd = clone->os_dsl_dataset->ds_dir;
774
775 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
776 error = dsl_dataset_hold_obj(dd->dd_pool,
777 dd->dd_phys->dd_origin_obj, FTAG, &pclone);
778 rw_exit(&dd->dd_pool->dp_config_rwlock);
779 if (error) {
780 dmu_objset_rele(clone, FTAG);
781 return (error);
782 }
783
784 error = zfs_secpolicy_write_perms(zc->zc_name,
785 ZFS_DELEG_PERM_MOUNT, cr);
786
787 dsl_dataset_name(pclone, parentname);
788 dmu_objset_rele(clone, FTAG);
789 dsl_dataset_rele(pclone, FTAG);
790 if (error == 0)
791 error = zfs_secpolicy_write_perms(parentname,
792 ZFS_DELEG_PERM_PROMOTE, cr);
793 }
794 return (error);
795 }
796
797 static int
798 zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr)
799 {
800 int error;
801
802 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
803 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
804 return (error);
805
806 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
807 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
808 return (error);
809
810 return (zfs_secpolicy_write_perms(zc->zc_name,
811 ZFS_DELEG_PERM_CREATE, cr));
812 }
813
814 int
815 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
816 {
817 return (zfs_secpolicy_write_perms(name,
818 ZFS_DELEG_PERM_SNAPSHOT, cr));
819 }
820
821 static int
822 zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr)
823 {
824
825 return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr));
826 }
827
828 static int
829 zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr)
830 {
831 char parentname[MAXNAMELEN];
832 int error;
833
834 if ((error = zfs_get_parent(zc->zc_name, parentname,
835 sizeof (parentname))) != 0)
836 return (error);
837
838 if (zc->zc_value[0] != '\0') {
839 if ((error = zfs_secpolicy_write_perms(zc->zc_value,
840 ZFS_DELEG_PERM_CLONE, cr)) != 0)
841 return (error);
842 }
843
844 if ((error = zfs_secpolicy_write_perms(parentname,
845 ZFS_DELEG_PERM_CREATE, cr)) != 0)
846 return (error);
847
848 error = zfs_secpolicy_write_perms(parentname,
849 ZFS_DELEG_PERM_MOUNT, cr);
850
851 return (error);
852 }
853
854 static int
855 zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr)
856 {
857 int error;
858
859 error = secpolicy_fs_unmount(cr, NULL);
860 if (error) {
861 error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr);
862 }
863 return (error);
864 }
865
866 /*
867 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
868 * SYS_CONFIG privilege, which is not available in a local zone.
869 */
870 /* ARGSUSED */
871 static int
872 zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr)
873 {
874 if (secpolicy_sys_config(cr, B_FALSE) != 0)
875 return (EPERM);
876
877 return (0);
878 }
879
880 /*
881 * Policy for object to name lookups.
882 */
883 /* ARGSUSED */
884 static int
885 zfs_secpolicy_diff(zfs_cmd_t *zc, cred_t *cr)
886 {
887 int error;
888
889 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
890 return (0);
891
892 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
893 return (error);
894 }
895
896 /*
897 * Policy for fault injection. Requires all privileges.
898 */
899 /* ARGSUSED */
900 static int
901 zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr)
902 {
903 return (secpolicy_zinject(cr));
904 }
905
906 static int
907 zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr)
908 {
909 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
910
911 if (prop == ZPROP_INVAL) {
912 if (!zfs_prop_user(zc->zc_value))
913 return (EINVAL);
914 return (zfs_secpolicy_write_perms(zc->zc_name,
915 ZFS_DELEG_PERM_USERPROP, cr));
916 } else {
917 return (zfs_secpolicy_setprop(zc->zc_name, prop,
918 NULL, cr));
919 }
920 }
921
922 static int
923 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, cred_t *cr)
924 {
925 int err = zfs_secpolicy_read(zc, cr);
926 if (err)
927 return (err);
928
929 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
930 return (EINVAL);
931
932 if (zc->zc_value[0] == 0) {
933 /*
934 * They are asking about a posix uid/gid. If it's
935 * themself, allow it.
936 */
937 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
938 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
939 if (zc->zc_guid == crgetuid(cr))
940 return (0);
941 } else {
942 if (groupmember(zc->zc_guid, cr))
943 return (0);
944 }
945 }
946
947 return (zfs_secpolicy_write_perms(zc->zc_name,
948 userquota_perms[zc->zc_objset_type], cr));
949 }
950
951 static int
952 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, cred_t *cr)
953 {
954 int err = zfs_secpolicy_read(zc, cr);
955 if (err)
956 return (err);
957
958 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
959 return (EINVAL);
960
961 return (zfs_secpolicy_write_perms(zc->zc_name,
962 userquota_perms[zc->zc_objset_type], cr));
963 }
964
965 static int
966 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, cred_t *cr)
967 {
968 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
969 NULL, cr));
970 }
971
972 static int
973 zfs_secpolicy_hold(zfs_cmd_t *zc, cred_t *cr)
974 {
975 return (zfs_secpolicy_write_perms(zc->zc_name,
976 ZFS_DELEG_PERM_HOLD, cr));
977 }
978
979 static int
980 zfs_secpolicy_release(zfs_cmd_t *zc, cred_t *cr)
981 {
982 return (zfs_secpolicy_write_perms(zc->zc_name,
983 ZFS_DELEG_PERM_RELEASE, cr));
984 }
985
986 /*
987 * Policy for allowing temporary snapshots to be taken or released
988 */
989 static int
990 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, cred_t *cr)
991 {
992 /*
993 * A temporary snapshot is the same as a snapshot,
994 * hold, destroy and release all rolled into one.
995 * Delegated diff alone is sufficient that we allow this.
996 */
997 int error;
998
999 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1000 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1001 return (0);
1002
1003 error = zfs_secpolicy_snapshot(zc, cr);
1004 if (!error)
1005 error = zfs_secpolicy_hold(zc, cr);
1006 if (!error)
1007 error = zfs_secpolicy_release(zc, cr);
1008 if (!error)
1009 error = zfs_secpolicy_destroy(zc, cr);
1010 return (error);
1011 }
1012
1013 /*
1014 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1015 */
1016 static int
1017 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1018 {
1019 char *packed;
1020 int error;
1021 nvlist_t *list = NULL;
1022
1023 /*
1024 * Read in and unpack the user-supplied nvlist.
1025 */
1026 if (size == 0)
1027 return (EINVAL);
1028
1029 packed = kmem_alloc(size, KM_SLEEP);
1030
1031 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1032 iflag)) != 0) {
1033 kmem_free(packed, size);
1034 return (error);
1035 }
1036
1037 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1038 kmem_free(packed, size);
1039 return (error);
1040 }
1041
1042 kmem_free(packed, size);
1043
1044 *nvp = list;
1045 return (0);
1046 }
1047
1048 static int
1049 fit_error_list(zfs_cmd_t *zc, nvlist_t **errors)
1050 {
1051 size_t size;
1052
1053 VERIFY(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0);
1054
1055 if (size > zc->zc_nvlist_dst_size) {
1056 nvpair_t *more_errors;
1057 int n = 0;
1058
1059 if (zc->zc_nvlist_dst_size < 1024)
1060 return (ENOMEM);
1061
1062 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, 0) == 0);
1063 more_errors = nvlist_prev_nvpair(*errors, NULL);
1064
1065 do {
1066 nvpair_t *pair = nvlist_prev_nvpair(*errors,
1067 more_errors);
1068 VERIFY(nvlist_remove_nvpair(*errors, pair) == 0);
1069 n++;
1070 VERIFY(nvlist_size(*errors, &size,
1071 NV_ENCODE_NATIVE) == 0);
1072 } while (size > zc->zc_nvlist_dst_size);
1073
1074 VERIFY(nvlist_remove_nvpair(*errors, more_errors) == 0);
1075 VERIFY(nvlist_add_int32(*errors, ZPROP_N_MORE_ERRORS, n) == 0);
1076 ASSERT(nvlist_size(*errors, &size, NV_ENCODE_NATIVE) == 0);
1077 ASSERT(size <= zc->zc_nvlist_dst_size);
1078 }
1079
1080 return (0);
1081 }
1082
1083 static int
1084 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1085 {
1086 char *packed = NULL;
1087 int error = 0;
1088 size_t size;
1089
1090 VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0);
1091
1092 if (size > zc->zc_nvlist_dst_size) {
1093 error = ENOMEM;
1094 } else {
1095 packed = kmem_alloc(size, KM_SLEEP);
1096 VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE,
1097 KM_SLEEP) == 0);
1098 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1099 size, zc->zc_iflags) != 0)
1100 error = EFAULT;
1101 kmem_free(packed, size);
1102 }
1103
1104 zc->zc_nvlist_dst_size = size;
1105 return (error);
1106 }
1107
1108 static int
1109 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1110 {
1111 objset_t *os;
1112 int error;
1113
1114 error = dmu_objset_hold(dsname, FTAG, &os);
1115 if (error)
1116 return (error);
1117 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1118 dmu_objset_rele(os, FTAG);
1119 return (EINVAL);
1120 }
1121
1122 mutex_enter(&os->os_user_ptr_lock);
1123 *zfvp = dmu_objset_get_user(os);
1124 if (*zfvp) {
1125 VFS_HOLD((*zfvp)->z_vfs);
1126 } else {
1127 error = ESRCH;
1128 }
1129 mutex_exit(&os->os_user_ptr_lock);
1130 dmu_objset_rele(os, FTAG);
1131 return (error);
1132 }
1133
1134 /*
1135 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1136 * case its z_vfs will be NULL, and it will be opened as the owner.
1137 */
1138 static int
1139 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1140 {
1141 int error = 0;
1142
1143 if (getzfsvfs(name, zfvp) != 0)
1144 error = zfsvfs_create(name, zfvp);
1145 if (error == 0) {
1146 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1147 RW_READER, tag);
1148 if ((*zfvp)->z_unmounted) {
1149 /*
1150 * XXX we could probably try again, since the unmounting
1151 * thread should be just about to disassociate the
1152 * objset from the zfsvfs.
1153 */
1154 rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1155 return (EBUSY);
1156 }
1157 }
1158 return (error);
1159 }
1160
1161 static void
1162 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1163 {
1164 rrw_exit(&zfsvfs->z_teardown_lock, tag);
1165
1166 if (zfsvfs->z_vfs) {
1167 VFS_RELE(zfsvfs->z_vfs);
1168 } else {
1169 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1170 zfsvfs_free(zfsvfs);
1171 }
1172 }
1173
1174 static int
1175 zfs_ioc_pool_create(zfs_cmd_t *zc)
1176 {
1177 int error;
1178 nvlist_t *config, *props = NULL;
1179 nvlist_t *rootprops = NULL;
1180 nvlist_t *zplprops = NULL;
1181 char *buf;
1182
1183 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1184 zc->zc_iflags, &config))
1185 return (error);
1186
1187 if (zc->zc_nvlist_src_size != 0 && (error =
1188 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1189 zc->zc_iflags, &props))) {
1190 nvlist_free(config);
1191 return (error);
1192 }
1193
1194 if (props) {
1195 nvlist_t *nvl = NULL;
1196 uint64_t version = SPA_VERSION;
1197
1198 (void) nvlist_lookup_uint64(props,
1199 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1200 if (version < SPA_VERSION_INITIAL || version > SPA_VERSION) {
1201 error = EINVAL;
1202 goto pool_props_bad;
1203 }
1204 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1205 if (nvl) {
1206 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1207 if (error != 0) {
1208 nvlist_free(config);
1209 nvlist_free(props);
1210 return (error);
1211 }
1212 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1213 }
1214 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1215 error = zfs_fill_zplprops_root(version, rootprops,
1216 zplprops, NULL);
1217 if (error)
1218 goto pool_props_bad;
1219 }
1220
1221 buf = history_str_get(zc);
1222
1223 error = spa_create(zc->zc_name, config, props, buf, zplprops);
1224
1225 /*
1226 * Set the remaining root properties
1227 */
1228 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1229 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1230 (void) spa_destroy(zc->zc_name);
1231
1232 if (buf != NULL)
1233 history_str_free(buf);
1234
1235 pool_props_bad:
1236 nvlist_free(rootprops);
1237 nvlist_free(zplprops);
1238 nvlist_free(config);
1239 nvlist_free(props);
1240
1241 return (error);
1242 }
1243
1244 static int
1245 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1246 {
1247 int error;
1248 zfs_log_history(zc);
1249 error = spa_destroy(zc->zc_name);
1250 if (error == 0)
1251 zvol_remove_minors(zc->zc_name);
1252 return (error);
1253 }
1254
1255 static int
1256 zfs_ioc_pool_import(zfs_cmd_t *zc)
1257 {
1258 nvlist_t *config, *props = NULL;
1259 uint64_t guid;
1260 int error;
1261
1262 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1263 zc->zc_iflags, &config)) != 0)
1264 return (error);
1265
1266 if (zc->zc_nvlist_src_size != 0 && (error =
1267 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1268 zc->zc_iflags, &props))) {
1269 nvlist_free(config);
1270 return (error);
1271 }
1272
1273 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1274 guid != zc->zc_guid)
1275 error = EINVAL;
1276 else
1277 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1278
1279 if (zc->zc_nvlist_dst != 0) {
1280 int err;
1281
1282 if ((err = put_nvlist(zc, config)) != 0)
1283 error = err;
1284 }
1285
1286 nvlist_free(config);
1287
1288 if (props)
1289 nvlist_free(props);
1290
1291 return (error);
1292 }
1293
1294 static int
1295 zfs_ioc_pool_export(zfs_cmd_t *zc)
1296 {
1297 int error;
1298 boolean_t force = (boolean_t)zc->zc_cookie;
1299 boolean_t hardforce = (boolean_t)zc->zc_guid;
1300
1301 zfs_log_history(zc);
1302 error = spa_export(zc->zc_name, NULL, force, hardforce);
1303 if (error == 0)
1304 zvol_remove_minors(zc->zc_name);
1305 return (error);
1306 }
1307
1308 static int
1309 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1310 {
1311 nvlist_t *configs;
1312 int error;
1313
1314 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1315 return (EEXIST);
1316
1317 error = put_nvlist(zc, configs);
1318
1319 nvlist_free(configs);
1320
1321 return (error);
1322 }
1323
1324 static int
1325 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1326 {
1327 nvlist_t *config;
1328 int error;
1329 int ret = 0;
1330
1331 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1332 sizeof (zc->zc_value));
1333
1334 if (config != NULL) {
1335 ret = put_nvlist(zc, config);
1336 nvlist_free(config);
1337
1338 /*
1339 * The config may be present even if 'error' is non-zero.
1340 * In this case we return success, and preserve the real errno
1341 * in 'zc_cookie'.
1342 */
1343 zc->zc_cookie = error;
1344 } else {
1345 ret = error;
1346 }
1347
1348 return (ret);
1349 }
1350
1351 /*
1352 * Try to import the given pool, returning pool stats as appropriate so that
1353 * user land knows which devices are available and overall pool health.
1354 */
1355 static int
1356 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1357 {
1358 nvlist_t *tryconfig, *config;
1359 int error;
1360
1361 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1362 zc->zc_iflags, &tryconfig)) != 0)
1363 return (error);
1364
1365 config = spa_tryimport(tryconfig);
1366
1367 nvlist_free(tryconfig);
1368
1369 if (config == NULL)
1370 return (EINVAL);
1371
1372 error = put_nvlist(zc, config);
1373 nvlist_free(config);
1374
1375 return (error);
1376 }
1377
1378 /*
1379 * inputs:
1380 * zc_name name of the pool
1381 * zc_cookie scan func (pool_scan_func_t)
1382 */
1383 static int
1384 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1385 {
1386 spa_t *spa;
1387 int error;
1388
1389 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1390 return (error);
1391
1392 if (zc->zc_cookie == POOL_SCAN_NONE)
1393 error = spa_scan_stop(spa);
1394 else
1395 error = spa_scan(spa, zc->zc_cookie);
1396
1397 spa_close(spa, FTAG);
1398
1399 return (error);
1400 }
1401
1402 static int
1403 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1404 {
1405 spa_t *spa;
1406 int error;
1407
1408 error = spa_open(zc->zc_name, &spa, FTAG);
1409 if (error == 0) {
1410 spa_freeze(spa);
1411 spa_close(spa, FTAG);
1412 }
1413 return (error);
1414 }
1415
1416 static int
1417 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1418 {
1419 spa_t *spa;
1420 int error;
1421
1422 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1423 return (error);
1424
1425 if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) {
1426 spa_close(spa, FTAG);
1427 return (EINVAL);
1428 }
1429
1430 spa_upgrade(spa, zc->zc_cookie);
1431 spa_close(spa, FTAG);
1432
1433 return (error);
1434 }
1435
1436 static int
1437 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1438 {
1439 spa_t *spa;
1440 char *hist_buf;
1441 uint64_t size;
1442 int error;
1443
1444 if ((size = zc->zc_history_len) == 0)
1445 return (EINVAL);
1446
1447 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1448 return (error);
1449
1450 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1451 spa_close(spa, FTAG);
1452 return (ENOTSUP);
1453 }
1454
1455 hist_buf = kmem_alloc(size, KM_SLEEP);
1456 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1457 &zc->zc_history_len, hist_buf)) == 0) {
1458 error = ddi_copyout(hist_buf,
1459 (void *)(uintptr_t)zc->zc_history,
1460 zc->zc_history_len, zc->zc_iflags);
1461 }
1462
1463 spa_close(spa, FTAG);
1464 kmem_free(hist_buf, size);
1465 return (error);
1466 }
1467
1468 static int
1469 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1470 {
1471 spa_t *spa;
1472 int error;
1473
1474 error = spa_open(zc->zc_name, &spa, FTAG);
1475 if (error == 0) {
1476 error = spa_change_guid(spa);
1477 spa_close(spa, FTAG);
1478 }
1479 return (error);
1480 }
1481
1482 static int
1483 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1484 {
1485 int error;
1486
1487 if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value))
1488 return (error);
1489
1490 return (0);
1491 }
1492
1493 /*
1494 * inputs:
1495 * zc_name name of filesystem
1496 * zc_obj object to find
1497 *
1498 * outputs:
1499 * zc_value name of object
1500 */
1501 static int
1502 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1503 {
1504 objset_t *os;
1505 int error;
1506
1507 /* XXX reading from objset not owned */
1508 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1509 return (error);
1510 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1511 dmu_objset_rele(os, FTAG);
1512 return (EINVAL);
1513 }
1514 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1515 sizeof (zc->zc_value));
1516 dmu_objset_rele(os, FTAG);
1517
1518 return (error);
1519 }
1520
1521 /*
1522 * inputs:
1523 * zc_name name of filesystem
1524 * zc_obj object to find
1525 *
1526 * outputs:
1527 * zc_stat stats on object
1528 * zc_value path to object
1529 */
1530 static int
1531 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1532 {
1533 objset_t *os;
1534 int error;
1535
1536 /* XXX reading from objset not owned */
1537 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1538 return (error);
1539 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1540 dmu_objset_rele(os, FTAG);
1541 return (EINVAL);
1542 }
1543 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1544 sizeof (zc->zc_value));
1545 dmu_objset_rele(os, FTAG);
1546
1547 return (error);
1548 }
1549
1550 static int
1551 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1552 {
1553 spa_t *spa;
1554 int error;
1555 nvlist_t *config, **l2cache, **spares;
1556 uint_t nl2cache = 0, nspares = 0;
1557
1558 error = spa_open(zc->zc_name, &spa, FTAG);
1559 if (error != 0)
1560 return (error);
1561
1562 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1563 zc->zc_iflags, &config);
1564 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1565 &l2cache, &nl2cache);
1566
1567 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1568 &spares, &nspares);
1569
1570 /*
1571 * A root pool with concatenated devices is not supported.
1572 * Thus, can not add a device to a root pool.
1573 *
1574 * Intent log device can not be added to a rootpool because
1575 * during mountroot, zil is replayed, a seperated log device
1576 * can not be accessed during the mountroot time.
1577 *
1578 * l2cache and spare devices are ok to be added to a rootpool.
1579 */
1580 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1581 nvlist_free(config);
1582 spa_close(spa, FTAG);
1583 return (EDOM);
1584 }
1585
1586 if (error == 0) {
1587 error = spa_vdev_add(spa, config);
1588 nvlist_free(config);
1589 }
1590 spa_close(spa, FTAG);
1591 return (error);
1592 }
1593
1594 /*
1595 * inputs:
1596 * zc_name name of the pool
1597 * zc_nvlist_conf nvlist of devices to remove
1598 * zc_cookie to stop the remove?
1599 */
1600 static int
1601 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1602 {
1603 spa_t *spa;
1604 int error;
1605
1606 error = spa_open(zc->zc_name, &spa, FTAG);
1607 if (error != 0)
1608 return (error);
1609 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1610 spa_close(spa, FTAG);
1611 return (error);
1612 }
1613
1614 static int
1615 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1616 {
1617 spa_t *spa;
1618 int error;
1619 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1620
1621 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1622 return (error);
1623 switch (zc->zc_cookie) {
1624 case VDEV_STATE_ONLINE:
1625 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1626 break;
1627
1628 case VDEV_STATE_OFFLINE:
1629 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1630 break;
1631
1632 case VDEV_STATE_FAULTED:
1633 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1634 zc->zc_obj != VDEV_AUX_EXTERNAL)
1635 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1636
1637 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1638 break;
1639
1640 case VDEV_STATE_DEGRADED:
1641 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1642 zc->zc_obj != VDEV_AUX_EXTERNAL)
1643 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1644
1645 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1646 break;
1647
1648 default:
1649 error = EINVAL;
1650 }
1651 zc->zc_cookie = newstate;
1652 spa_close(spa, FTAG);
1653 return (error);
1654 }
1655
1656 static int
1657 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1658 {
1659 spa_t *spa;
1660 int replacing = zc->zc_cookie;
1661 nvlist_t *config;
1662 int error;
1663
1664 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1665 return (error);
1666
1667 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1668 zc->zc_iflags, &config)) == 0) {
1669 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1670 nvlist_free(config);
1671 }
1672
1673 spa_close(spa, FTAG);
1674 return (error);
1675 }
1676
1677 static int
1678 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1679 {
1680 spa_t *spa;
1681 int error;
1682
1683 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1684 return (error);
1685
1686 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1687
1688 spa_close(spa, FTAG);
1689 return (error);
1690 }
1691
1692 static int
1693 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1694 {
1695 spa_t *spa;
1696 nvlist_t *config, *props = NULL;
1697 int error;
1698 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1699
1700 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1701 return (error);
1702
1703 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1704 zc->zc_iflags, &config)) {
1705 spa_close(spa, FTAG);
1706 return (error);
1707 }
1708
1709 if (zc->zc_nvlist_src_size != 0 && (error =
1710 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1711 zc->zc_iflags, &props))) {
1712 spa_close(spa, FTAG);
1713 nvlist_free(config);
1714 return (error);
1715 }
1716
1717 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1718
1719 spa_close(spa, FTAG);
1720
1721 nvlist_free(config);
1722 nvlist_free(props);
1723
1724 return (error);
1725 }
1726
1727 static int
1728 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
1729 {
1730 spa_t *spa;
1731 char *path = zc->zc_value;
1732 uint64_t guid = zc->zc_guid;
1733 int error;
1734
1735 error = spa_open(zc->zc_name, &spa, FTAG);
1736 if (error != 0)
1737 return (error);
1738
1739 error = spa_vdev_setpath(spa, guid, path);
1740 spa_close(spa, FTAG);
1741 return (error);
1742 }
1743
1744 static int
1745 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
1746 {
1747 spa_t *spa;
1748 char *fru = zc->zc_value;
1749 uint64_t guid = zc->zc_guid;
1750 int error;
1751
1752 error = spa_open(zc->zc_name, &spa, FTAG);
1753 if (error != 0)
1754 return (error);
1755
1756 error = spa_vdev_setfru(spa, guid, fru);
1757 spa_close(spa, FTAG);
1758 return (error);
1759 }
1760
1761 static int
1762 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
1763 {
1764 int error = 0;
1765 nvlist_t *nv;
1766
1767 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1768
1769 if (zc->zc_nvlist_dst != 0 &&
1770 (error = dsl_prop_get_all(os, &nv)) == 0) {
1771 dmu_objset_stats(os, nv);
1772 /*
1773 * NB: zvol_get_stats() will read the objset contents,
1774 * which we aren't supposed to do with a
1775 * DS_MODE_USER hold, because it could be
1776 * inconsistent. So this is a bit of a workaround...
1777 * XXX reading with out owning
1778 */
1779 if (!zc->zc_objset_stats.dds_inconsistent &&
1780 dmu_objset_type(os) == DMU_OST_ZVOL) {
1781 error = zvol_get_stats(os, nv);
1782 if (error == EIO)
1783 return (error);
1784 VERIFY3S(error, ==, 0);
1785 }
1786 error = put_nvlist(zc, nv);
1787 nvlist_free(nv);
1788 }
1789
1790 return (error);
1791 }
1792
1793 /*
1794 * inputs:
1795 * zc_name name of filesystem
1796 * zc_nvlist_dst_size size of buffer for property nvlist
1797 *
1798 * outputs:
1799 * zc_objset_stats stats
1800 * zc_nvlist_dst property nvlist
1801 * zc_nvlist_dst_size size of property nvlist
1802 */
1803 static int
1804 zfs_ioc_objset_stats(zfs_cmd_t *zc)
1805 {
1806 objset_t *os = NULL;
1807 int error;
1808
1809 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
1810 return (error);
1811
1812 error = zfs_ioc_objset_stats_impl(zc, os);
1813
1814 dmu_objset_rele(os, FTAG);
1815
1816 return (error);
1817 }
1818
1819 /*
1820 * inputs:
1821 * zc_name name of filesystem
1822 * zc_nvlist_dst_size size of buffer for property nvlist
1823 *
1824 * outputs:
1825 * zc_nvlist_dst received property nvlist
1826 * zc_nvlist_dst_size size of received property nvlist
1827 *
1828 * Gets received properties (distinct from local properties on or after
1829 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
1830 * local property values.
1831 */
1832 static int
1833 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
1834 {
1835 objset_t *os = NULL;
1836 int error;
1837 nvlist_t *nv;
1838
1839 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os))
1840 return (error);
1841
1842 /*
1843 * Without this check, we would return local property values if the
1844 * caller has not already received properties on or after
1845 * SPA_VERSION_RECVD_PROPS.
1846 */
1847 if (!dsl_prop_get_hasrecvd(os)) {
1848 dmu_objset_rele(os, FTAG);
1849 return (ENOTSUP);
1850 }
1851
1852 if (zc->zc_nvlist_dst != 0 &&
1853 (error = dsl_prop_get_received(os, &nv)) == 0) {
1854 error = put_nvlist(zc, nv);
1855 nvlist_free(nv);
1856 }
1857
1858 dmu_objset_rele(os, FTAG);
1859 return (error);
1860 }
1861
1862 static int
1863 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
1864 {
1865 uint64_t value;
1866 int error;
1867
1868 /*
1869 * zfs_get_zplprop() will either find a value or give us
1870 * the default value (if there is one).
1871 */
1872 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
1873 return (error);
1874 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
1875 return (0);
1876 }
1877
1878 /*
1879 * inputs:
1880 * zc_name name of filesystem
1881 * zc_nvlist_dst_size size of buffer for zpl property nvlist
1882 *
1883 * outputs:
1884 * zc_nvlist_dst zpl property nvlist
1885 * zc_nvlist_dst_size size of zpl property nvlist
1886 */
1887 static int
1888 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
1889 {
1890 objset_t *os;
1891 int err;
1892
1893 /* XXX reading without owning */
1894 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
1895 return (err);
1896
1897 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1898
1899 /*
1900 * NB: nvl_add_zplprop() will read the objset contents,
1901 * which we aren't supposed to do with a DS_MODE_USER
1902 * hold, because it could be inconsistent.
1903 */
1904 if (zc->zc_nvlist_dst != NULL &&
1905 !zc->zc_objset_stats.dds_inconsistent &&
1906 dmu_objset_type(os) == DMU_OST_ZFS) {
1907 nvlist_t *nv;
1908
1909 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1910 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
1911 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
1912 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
1913 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
1914 err = put_nvlist(zc, nv);
1915 nvlist_free(nv);
1916 } else {
1917 err = ENOENT;
1918 }
1919 dmu_objset_rele(os, FTAG);
1920 return (err);
1921 }
1922
1923 static boolean_t
1924 dataset_name_hidden(const char *name)
1925 {
1926 /*
1927 * Skip over datasets that are not visible in this zone,
1928 * internal datasets (which have a $ in their name), and
1929 * temporary datasets (which have a % in their name).
1930 */
1931 if (strchr(name, '$') != NULL)
1932 return (B_TRUE);
1933 if (strchr(name, '%') != NULL)
1934 return (B_TRUE);
1935 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
1936 return (B_TRUE);
1937 return (B_FALSE);
1938 }
1939
1940 /*
1941 * inputs:
1942 * zc_name name of filesystem
1943 * zc_cookie zap cursor
1944 * zc_nvlist_dst_size size of buffer for property nvlist
1945 *
1946 * outputs:
1947 * zc_name name of next filesystem
1948 * zc_cookie zap cursor
1949 * zc_objset_stats stats
1950 * zc_nvlist_dst property nvlist
1951 * zc_nvlist_dst_size size of property nvlist
1952 */
1953 static int
1954 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
1955 {
1956 objset_t *os;
1957 int error;
1958 char *p;
1959 size_t orig_len = strlen(zc->zc_name);
1960
1961 top:
1962 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
1963 if (error == ENOENT)
1964 error = ESRCH;
1965 return (error);
1966 }
1967
1968 p = strrchr(zc->zc_name, '/');
1969 if (p == NULL || p[1] != '\0')
1970 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
1971 p = zc->zc_name + strlen(zc->zc_name);
1972
1973 /*
1974 * Pre-fetch the datasets. dmu_objset_prefetch() always returns 0
1975 * but is not declared void because its called by dmu_objset_find().
1976 */
1977 if (zc->zc_cookie == 0) {
1978 uint64_t cookie = 0;
1979 int len = sizeof (zc->zc_name) - (p - zc->zc_name);
1980
1981 while (dmu_dir_list_next(os, len, p, NULL, &cookie) == 0) {
1982 if (!dataset_name_hidden(zc->zc_name))
1983 (void) dmu_objset_prefetch(zc->zc_name, NULL);
1984 }
1985 }
1986
1987 do {
1988 error = dmu_dir_list_next(os,
1989 sizeof (zc->zc_name) - (p - zc->zc_name), p,
1990 NULL, &zc->zc_cookie);
1991 if (error == ENOENT)
1992 error = ESRCH;
1993 } while (error == 0 && dataset_name_hidden(zc->zc_name));
1994 dmu_objset_rele(os, FTAG);
1995
1996 /*
1997 * If it's an internal dataset (ie. with a '$' in its name),
1998 * don't try to get stats for it, otherwise we'll return ENOENT.
1999 */
2000 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2001 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2002 if (error == ENOENT) {
2003 /* We lost a race with destroy, get the next one. */
2004 zc->zc_name[orig_len] = '\0';
2005 goto top;
2006 }
2007 }
2008 return (error);
2009 }
2010
2011 /*
2012 * inputs:
2013 * zc_name name of filesystem
2014 * zc_cookie zap cursor
2015 * zc_nvlist_dst_size size of buffer for property nvlist
2016 *
2017 * outputs:
2018 * zc_name name of next snapshot
2019 * zc_objset_stats stats
2020 * zc_nvlist_dst property nvlist
2021 * zc_nvlist_dst_size size of property nvlist
2022 */
2023 static int
2024 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2025 {
2026 objset_t *os;
2027 int error;
2028
2029 top:
2030 if (zc->zc_cookie == 0)
2031 (void) dmu_objset_find(zc->zc_name, dmu_objset_prefetch,
2032 NULL, DS_FIND_SNAPSHOTS);
2033
2034 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2035 if (error)
2036 return (error == ENOENT ? ESRCH : error);
2037
2038 /*
2039 * A dataset name of maximum length cannot have any snapshots,
2040 * so exit immediately.
2041 */
2042 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2043 dmu_objset_rele(os, FTAG);
2044 return (ESRCH);
2045 }
2046
2047 error = dmu_snapshot_list_next(os,
2048 sizeof (zc->zc_name) - strlen(zc->zc_name),
2049 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2050 NULL);
2051
2052 if (error == 0) {
2053 dsl_dataset_t *ds;
2054 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2055
2056 /*
2057 * Since we probably don't have a hold on this snapshot,
2058 * it's possible that the objsetid could have been destroyed
2059 * and reused for a new objset. It's OK if this happens during
2060 * a zfs send operation, since the new createtxg will be
2061 * beyond the range we're interested in.
2062 */
2063 rw_enter(&dp->dp_config_rwlock, RW_READER);
2064 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2065 rw_exit(&dp->dp_config_rwlock);
2066 if (error) {
2067 if (error == ENOENT) {
2068 /* Racing with destroy, get the next one. */
2069 *strchr(zc->zc_name, '@') = '\0';
2070 dmu_objset_rele(os, FTAG);
2071 goto top;
2072 }
2073 } else {
2074 objset_t *ossnap;
2075
2076 error = dmu_objset_from_ds(ds, &ossnap);
2077 if (error == 0)
2078 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2079 dsl_dataset_rele(ds, FTAG);
2080 }
2081 } else if (error == ENOENT) {
2082 error = ESRCH;
2083 }
2084
2085 dmu_objset_rele(os, FTAG);
2086 /* if we failed, undo the @ that we tacked on to zc_name */
2087 if (error)
2088 *strchr(zc->zc_name, '@') = '\0';
2089 return (error);
2090 }
2091
2092 static int
2093 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2094 {
2095 const char *propname = nvpair_name(pair);
2096 uint64_t *valary;
2097 unsigned int vallen;
2098 const char *domain;
2099 char *dash;
2100 zfs_userquota_prop_t type;
2101 uint64_t rid;
2102 uint64_t quota;
2103 zfsvfs_t *zfsvfs;
2104 int err;
2105
2106 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2107 nvlist_t *attrs;
2108 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2109 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2110 &pair) != 0)
2111 return (EINVAL);
2112 }
2113
2114 /*
2115 * A correctly constructed propname is encoded as
2116 * userquota@<rid>-<domain>.
2117 */
2118 if ((dash = strchr(propname, '-')) == NULL ||
2119 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2120 vallen != 3)
2121 return (EINVAL);
2122
2123 domain = dash + 1;
2124 type = valary[0];
2125 rid = valary[1];
2126 quota = valary[2];
2127
2128 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2129 if (err == 0) {
2130 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2131 zfsvfs_rele(zfsvfs, FTAG);
2132 }
2133
2134 return (err);
2135 }
2136
2137 /*
2138 * If the named property is one that has a special function to set its value,
2139 * return 0 on success and a positive error code on failure; otherwise if it is
2140 * not one of the special properties handled by this function, return -1.
2141 *
2142 * XXX: It would be better for callers of the property interface if we handled
2143 * these special cases in dsl_prop.c (in the dsl layer).
2144 */
2145 static int
2146 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2147 nvpair_t *pair)
2148 {
2149 const char *propname = nvpair_name(pair);
2150 zfs_prop_t prop = zfs_name_to_prop(propname);
2151 uint64_t intval;
2152 int err;
2153
2154 if (prop == ZPROP_INVAL) {
2155 if (zfs_prop_userquota(propname))
2156 return (zfs_prop_set_userquota(dsname, pair));
2157 return (-1);
2158 }
2159
2160 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2161 nvlist_t *attrs;
2162 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2163 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2164 &pair) == 0);
2165 }
2166
2167 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2168 return (-1);
2169
2170 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2171
2172 switch (prop) {
2173 case ZFS_PROP_QUOTA:
2174 err = dsl_dir_set_quota(dsname, source, intval);
2175 break;
2176 case ZFS_PROP_REFQUOTA:
2177 err = dsl_dataset_set_quota(dsname, source, intval);
2178 break;
2179 case ZFS_PROP_RESERVATION:
2180 err = dsl_dir_set_reservation(dsname, source, intval);
2181 break;
2182 case ZFS_PROP_REFRESERVATION:
2183 err = dsl_dataset_set_reservation(dsname, source, intval);
2184 break;
2185 case ZFS_PROP_VOLSIZE:
2186 err = zvol_set_volsize(dsname, ddi_driver_major(zfs_dip),
2187 intval);
2188 break;
2189 case ZFS_PROP_VERSION:
2190 {
2191 zfsvfs_t *zfsvfs;
2192
2193 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2194 break;
2195
2196 err = zfs_set_version(zfsvfs, intval);
2197 zfsvfs_rele(zfsvfs, FTAG);
2198
2199 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2200 zfs_cmd_t *zc;
2201
2202 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2203 (void) strcpy(zc->zc_name, dsname);
2204 (void) zfs_ioc_userspace_upgrade(zc);
2205 kmem_free(zc, sizeof (zfs_cmd_t));
2206 }
2207 break;
2208 }
2209
2210 default:
2211 err = -1;
2212 }
2213
2214 return (err);
2215 }
2216
2217 /*
2218 * This function is best effort. If it fails to set any of the given properties,
2219 * it continues to set as many as it can and returns the first error
2220 * encountered. If the caller provides a non-NULL errlist, it also gives the
2221 * complete list of names of all the properties it failed to set along with the
2222 * corresponding error numbers. The caller is responsible for freeing the
2223 * returned errlist.
2224 *
2225 * If every property is set successfully, zero is returned and the list pointed
2226 * at by errlist is NULL.
2227 */
2228 int
2229 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2230 nvlist_t **errlist)
2231 {
2232 nvpair_t *pair;
2233 nvpair_t *propval;
2234 int rv = 0;
2235 uint64_t intval;
2236 char *strval;
2237 nvlist_t *genericnvl;
2238 nvlist_t *errors;
2239 nvlist_t *retrynvl;
2240
2241 VERIFY(nvlist_alloc(&genericnvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2242 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2243 VERIFY(nvlist_alloc(&retrynvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2244
2245 retry:
2246 pair = NULL;
2247 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2248 const char *propname = nvpair_name(pair);
2249 zfs_prop_t prop = zfs_name_to_prop(propname);
2250 int err = 0;
2251
2252 /* decode the property value */
2253 propval = pair;
2254 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2255 nvlist_t *attrs;
2256 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2257 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2258 &propval) != 0)
2259 err = EINVAL;
2260 }
2261
2262 /* Validate value type */
2263 if (err == 0 && prop == ZPROP_INVAL) {
2264 if (zfs_prop_user(propname)) {
2265 if (nvpair_type(propval) != DATA_TYPE_STRING)
2266 err = EINVAL;
2267 } else if (zfs_prop_userquota(propname)) {
2268 if (nvpair_type(propval) !=
2269 DATA_TYPE_UINT64_ARRAY)
2270 err = EINVAL;
2271 } else {
2272 err = EINVAL;
2273 }
2274 } else if (err == 0) {
2275 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2276 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2277 err = EINVAL;
2278 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2279 const char *unused;
2280
2281 VERIFY(nvpair_value_uint64(propval,
2282 &intval) == 0);
2283
2284 switch (zfs_prop_get_type(prop)) {
2285 case PROP_TYPE_NUMBER:
2286 break;
2287 case PROP_TYPE_STRING:
2288 err = EINVAL;
2289 break;
2290 case PROP_TYPE_INDEX:
2291 if (zfs_prop_index_to_string(prop,
2292 intval, &unused) != 0)
2293 err = EINVAL;
2294 break;
2295 default:
2296 cmn_err(CE_PANIC,
2297 "unknown property type");
2298 }
2299 } else {
2300 err = EINVAL;
2301 }
2302 }
2303
2304 /* Validate permissions */
2305 if (err == 0)
2306 err = zfs_check_settable(dsname, pair, CRED());
2307
2308 if (err == 0) {
2309 err = zfs_prop_set_special(dsname, source, pair);
2310 if (err == -1) {
2311 /*
2312 * For better performance we build up a list of
2313 * properties to set in a single transaction.
2314 */
2315 err = nvlist_add_nvpair(genericnvl, pair);
2316 } else if (err != 0 && nvl != retrynvl) {
2317 /*
2318 * This may be a spurious error caused by
2319 * receiving quota and reservation out of order.
2320 * Try again in a second pass.
2321 */
2322 err = nvlist_add_nvpair(retrynvl, pair);
2323 }
2324 }
2325
2326 if (err != 0)
2327 VERIFY(nvlist_add_int32(errors, propname, err) == 0);
2328 }
2329
2330 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2331 nvl = retrynvl;
2332 goto retry;
2333 }
2334
2335 if (!nvlist_empty(genericnvl) &&
2336 dsl_props_set(dsname, source, genericnvl) != 0) {
2337 /*
2338 * If this fails, we still want to set as many properties as we
2339 * can, so try setting them individually.
2340 */
2341 pair = NULL;
2342 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2343 const char *propname = nvpair_name(pair);
2344 int err = 0;
2345
2346 propval = pair;
2347 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2348 nvlist_t *attrs;
2349 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2350 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2351 &propval) == 0);
2352 }
2353
2354 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2355 VERIFY(nvpair_value_string(propval,
2356 &strval) == 0);
2357 err = dsl_prop_set(dsname, propname, source, 1,
2358 strlen(strval) + 1, strval);
2359 } else {
2360 VERIFY(nvpair_value_uint64(propval,
2361 &intval) == 0);
2362 err = dsl_prop_set(dsname, propname, source, 8,
2363 1, &intval);
2364 }
2365
2366 if (err != 0) {
2367 VERIFY(nvlist_add_int32(errors, propname,
2368 err) == 0);
2369 }
2370 }
2371 }
2372 nvlist_free(genericnvl);
2373 nvlist_free(retrynvl);
2374
2375 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
2376 nvlist_free(errors);
2377 errors = NULL;
2378 } else {
2379 VERIFY(nvpair_value_int32(pair, &rv) == 0);
2380 }
2381
2382 if (errlist == NULL)
2383 nvlist_free(errors);
2384 else
2385 *errlist = errors;
2386
2387 return (rv);
2388 }
2389
2390 /*
2391 * Check that all the properties are valid user properties.
2392 */
2393 static int
2394 zfs_check_userprops(char *fsname, nvlist_t *nvl)
2395 {
2396 nvpair_t *pair = NULL;
2397 int error = 0;
2398
2399 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2400 const char *propname = nvpair_name(pair);
2401 char *valstr;
2402
2403 if (!zfs_prop_user(propname) ||
2404 nvpair_type(pair) != DATA_TYPE_STRING)
2405 return (EINVAL);
2406
2407 if (error = zfs_secpolicy_write_perms(fsname,
2408 ZFS_DELEG_PERM_USERPROP, CRED()))
2409 return (error);
2410
2411 if (strlen(propname) >= ZAP_MAXNAMELEN)
2412 return (ENAMETOOLONG);
2413
2414 VERIFY(nvpair_value_string(pair, &valstr) == 0);
2415 if (strlen(valstr) >= ZAP_MAXVALUELEN)
2416 return (E2BIG);
2417 }
2418 return (0);
2419 }
2420
2421 static void
2422 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2423 {
2424 nvpair_t *pair;
2425
2426 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2427
2428 pair = NULL;
2429 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2430 if (nvlist_exists(skipped, nvpair_name(pair)))
2431 continue;
2432
2433 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2434 }
2435 }
2436
2437 static int
2438 clear_received_props(objset_t *os, const char *fs, nvlist_t *props,
2439 nvlist_t *skipped)
2440 {
2441 int err = 0;
2442 nvlist_t *cleared_props = NULL;
2443 props_skip(props, skipped, &cleared_props);
2444 if (!nvlist_empty(cleared_props)) {
2445 /*
2446 * Acts on local properties until the dataset has received
2447 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2448 */
2449 zprop_source_t flags = (ZPROP_SRC_NONE |
2450 (dsl_prop_get_hasrecvd(os) ? ZPROP_SRC_RECEIVED : 0));
2451 err = zfs_set_prop_nvlist(fs, flags, cleared_props, NULL);
2452 }
2453 nvlist_free(cleared_props);
2454 return (err);
2455 }
2456
2457 /*
2458 * inputs:
2459 * zc_name name of filesystem
2460 * zc_value name of property to set
2461 * zc_nvlist_src{_size} nvlist of properties to apply
2462 * zc_cookie received properties flag
2463 *
2464 * outputs:
2465 * zc_nvlist_dst{_size} error for each unapplied received property
2466 */
2467 static int
2468 zfs_ioc_set_prop(zfs_cmd_t *zc)
2469 {
2470 nvlist_t *nvl;
2471 boolean_t received = zc->zc_cookie;
2472 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2473 ZPROP_SRC_LOCAL);
2474 nvlist_t *errors = NULL;
2475 int error;
2476
2477 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2478 zc->zc_iflags, &nvl)) != 0)
2479 return (error);
2480
2481 if (received) {
2482 nvlist_t *origprops;
2483 objset_t *os;
2484
2485 if (dmu_objset_hold(zc->zc_name, FTAG, &os) == 0) {
2486 if (dsl_prop_get_received(os, &origprops) == 0) {
2487 (void) clear_received_props(os,
2488 zc->zc_name, origprops, nvl);
2489 nvlist_free(origprops);
2490 }
2491
2492 dsl_prop_set_hasrecvd(os);
2493 dmu_objset_rele(os, FTAG);
2494 }
2495 }
2496
2497 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, &errors);
2498
2499 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2500 (void) put_nvlist(zc, errors);
2501 }
2502
2503 nvlist_free(errors);
2504 nvlist_free(nvl);
2505 return (error);
2506 }
2507
2508 /*
2509 * inputs:
2510 * zc_name name of filesystem
2511 * zc_value name of property to inherit
2512 * zc_cookie revert to received value if TRUE
2513 *
2514 * outputs: none
2515 */
2516 static int
2517 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2518 {
2519 const char *propname = zc->zc_value;
2520 zfs_prop_t prop = zfs_name_to_prop(propname);
2521 boolean_t received = zc->zc_cookie;
2522 zprop_source_t source = (received
2523 ? ZPROP_SRC_NONE /* revert to received value, if any */
2524 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2525
2526 if (received) {
2527 nvlist_t *dummy;
2528 nvpair_t *pair;
2529 zprop_type_t type;
2530 int err;
2531
2532 /*
2533 * zfs_prop_set_special() expects properties in the form of an
2534 * nvpair with type info.
2535 */
2536 if (prop == ZPROP_INVAL) {
2537 if (!zfs_prop_user(propname))
2538 return (EINVAL);
2539
2540 type = PROP_TYPE_STRING;
2541 } else if (prop == ZFS_PROP_VOLSIZE ||
2542 prop == ZFS_PROP_VERSION) {
2543 return (EINVAL);
2544 } else {
2545 type = zfs_prop_get_type(prop);
2546 }
2547
2548 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2549
2550 switch (type) {
2551 case PROP_TYPE_STRING:
2552 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2553 break;
2554 case PROP_TYPE_NUMBER:
2555 case PROP_TYPE_INDEX:
2556 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2557 break;
2558 default:
2559 nvlist_free(dummy);
2560 return (EINVAL);
2561 }
2562
2563 pair = nvlist_next_nvpair(dummy, NULL);
2564 err = zfs_prop_set_special(zc->zc_name, source, pair);
2565 nvlist_free(dummy);
2566 if (err != -1)
2567 return (err); /* special property already handled */
2568 } else {
2569 /*
2570 * Only check this in the non-received case. We want to allow
2571 * 'inherit -S' to revert non-inheritable properties like quota
2572 * and reservation to the received or default values even though
2573 * they are not considered inheritable.
2574 */
2575 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2576 return (EINVAL);
2577 }
2578
2579 /* the property name has been validated by zfs_secpolicy_inherit() */
2580 return (dsl_prop_set(zc->zc_name, zc->zc_value, source, 0, 0, NULL));
2581 }
2582
2583 static int
2584 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2585 {
2586 nvlist_t *props;
2587 spa_t *spa;
2588 int error;
2589 nvpair_t *pair;
2590
2591 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2592 zc->zc_iflags, &props))
2593 return (error);
2594
2595 /*
2596 * If the only property is the configfile, then just do a spa_lookup()
2597 * to handle the faulted case.
2598 */
2599 pair = nvlist_next_nvpair(props, NULL);
2600 if (pair != NULL && strcmp(nvpair_name(pair),
2601 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2602 nvlist_next_nvpair(props, pair) == NULL) {
2603 mutex_enter(&spa_namespace_lock);
2604 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2605 spa_configfile_set(spa, props, B_FALSE);
2606 spa_config_sync(spa, B_FALSE, B_TRUE);
2607 }
2608 mutex_exit(&spa_namespace_lock);
2609 if (spa != NULL) {
2610 nvlist_free(props);
2611 return (0);
2612 }
2613 }
2614
2615 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2616 nvlist_free(props);
2617 return (error);
2618 }
2619
2620 error = spa_prop_set(spa, props);
2621
2622 nvlist_free(props);
2623 spa_close(spa, FTAG);
2624
2625 return (error);
2626 }
2627
2628 static int
2629 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2630 {
2631 spa_t *spa;
2632 int error;
2633 nvlist_t *nvp = NULL;
2634
2635 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2636 /*
2637 * If the pool is faulted, there may be properties we can still
2638 * get (such as altroot and cachefile), so attempt to get them
2639 * anyway.
2640 */
2641 mutex_enter(&spa_namespace_lock);
2642 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2643 error = spa_prop_get(spa, &nvp);
2644 mutex_exit(&spa_namespace_lock);
2645 } else {
2646 error = spa_prop_get(spa, &nvp);
2647 spa_close(spa, FTAG);
2648 }
2649
2650 if (error == 0 && zc->zc_nvlist_dst != NULL)
2651 error = put_nvlist(zc, nvp);
2652 else
2653 error = EFAULT;
2654
2655 nvlist_free(nvp);
2656 return (error);
2657 }
2658
2659 /*
2660 * inputs:
2661 * zc_name name of filesystem
2662 * zc_nvlist_src{_size} nvlist of delegated permissions
2663 * zc_perm_action allow/unallow flag
2664 *
2665 * outputs: none
2666 */
2667 static int
2668 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2669 {
2670 int error;
2671 nvlist_t *fsaclnv = NULL;
2672
2673 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2674 zc->zc_iflags, &fsaclnv)) != 0)
2675 return (error);
2676
2677 /*
2678 * Verify nvlist is constructed correctly
2679 */
2680 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2681 nvlist_free(fsaclnv);
2682 return (EINVAL);
2683 }
2684
2685 /*
2686 * If we don't have PRIV_SYS_MOUNT, then validate
2687 * that user is allowed to hand out each permission in
2688 * the nvlist(s)
2689 */
2690
2691 error = secpolicy_zfs(CRED());
2692 if (error) {
2693 if (zc->zc_perm_action == B_FALSE) {
2694 error = dsl_deleg_can_allow(zc->zc_name,
2695 fsaclnv, CRED());
2696 } else {
2697 error = dsl_deleg_can_unallow(zc->zc_name,
2698 fsaclnv, CRED());
2699 }
2700 }
2701
2702 if (error == 0)
2703 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2704
2705 nvlist_free(fsaclnv);
2706 return (error);
2707 }
2708
2709 /*
2710 * inputs:
2711 * zc_name name of filesystem
2712 *
2713 * outputs:
2714 * zc_nvlist_src{_size} nvlist of delegated permissions
2715 */
2716 static int
2717 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2718 {
2719 nvlist_t *nvp;
2720 int error;
2721
2722 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2723 error = put_nvlist(zc, nvp);
2724 nvlist_free(nvp);
2725 }
2726
2727 return (error);
2728 }
2729
2730 /*
2731 * Search the vfs list for a specified resource. Returns a pointer to it
2732 * or NULL if no suitable entry is found. The caller of this routine
2733 * is responsible for releasing the returned vfs pointer.
2734 */
2735 static vfs_t *
2736 zfs_get_vfs(const char *resource)
2737 {
2738 struct vfs *vfsp;
2739 struct vfs *vfs_found = NULL;
2740
2741 vfs_list_read_lock();
2742 vfsp = rootvfs;
2743 do {
2744 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2745 VFS_HOLD(vfsp);
2746 vfs_found = vfsp;
2747 break;
2748 }
2749 vfsp = vfsp->vfs_next;
2750 } while (vfsp != rootvfs);
2751 vfs_list_unlock();
2752 return (vfs_found);
2753 }
2754
2755 /* ARGSUSED */
2756 static void
2757 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2758 {
2759 zfs_creat_t *zct = arg;
2760
2761 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2762 }
2763
2764 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2765
2766 /*
2767 * inputs:
2768 * createprops list of properties requested by creator
2769 * default_zplver zpl version to use if unspecified in createprops
2770 * fuids_ok fuids allowed in this version of the spa?
2771 * os parent objset pointer (NULL if root fs)
2772 *
2773 * outputs:
2774 * zplprops values for the zplprops we attach to the master node object
2775 * is_ci true if requested file system will be purely case-insensitive
2776 *
2777 * Determine the settings for utf8only, normalization and
2778 * casesensitivity. Specific values may have been requested by the
2779 * creator and/or we can inherit values from the parent dataset. If
2780 * the file system is of too early a vintage, a creator can not
2781 * request settings for these properties, even if the requested
2782 * setting is the default value. We don't actually want to create dsl
2783 * properties for these, so remove them from the source nvlist after
2784 * processing.
2785 */
2786 static int
2787 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
2788 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
2789 nvlist_t *zplprops, boolean_t *is_ci)
2790 {
2791 uint64_t sense = ZFS_PROP_UNDEFINED;
2792 uint64_t norm = ZFS_PROP_UNDEFINED;
2793 uint64_t u8 = ZFS_PROP_UNDEFINED;
2794
2795 ASSERT(zplprops != NULL);
2796
2797 /*
2798 * Pull out creator prop choices, if any.
2799 */
2800 if (createprops) {
2801 (void) nvlist_lookup_uint64(createprops,
2802 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
2803 (void) nvlist_lookup_uint64(createprops,
2804 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
2805 (void) nvlist_remove_all(createprops,
2806 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
2807 (void) nvlist_lookup_uint64(createprops,
2808 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
2809 (void) nvlist_remove_all(createprops,
2810 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
2811 (void) nvlist_lookup_uint64(createprops,
2812 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
2813 (void) nvlist_remove_all(createprops,
2814 zfs_prop_to_name(ZFS_PROP_CASE));
2815 }
2816
2817 /*
2818 * If the zpl version requested is whacky or the file system
2819 * or pool is version is too "young" to support normalization
2820 * and the creator tried to set a value for one of the props,
2821 * error out.
2822 */
2823 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
2824 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
2825 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
2826 (zplver < ZPL_VERSION_NORMALIZATION &&
2827 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
2828 sense != ZFS_PROP_UNDEFINED)))
2829 return (ENOTSUP);
2830
2831 /*
2832 * Put the version in the zplprops
2833 */
2834 VERIFY(nvlist_add_uint64(zplprops,
2835 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
2836
2837 if (norm == ZFS_PROP_UNDEFINED)
2838 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
2839 VERIFY(nvlist_add_uint64(zplprops,
2840 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
2841
2842 /*
2843 * If we're normalizing, names must always be valid UTF-8 strings.
2844 */
2845 if (norm)
2846 u8 = 1;
2847 if (u8 == ZFS_PROP_UNDEFINED)
2848 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
2849 VERIFY(nvlist_add_uint64(zplprops,
2850 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
2851
2852 if (sense == ZFS_PROP_UNDEFINED)
2853 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
2854 VERIFY(nvlist_add_uint64(zplprops,
2855 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
2856
2857 if (is_ci)
2858 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
2859
2860 return (0);
2861 }
2862
2863 static int
2864 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
2865 nvlist_t *zplprops, boolean_t *is_ci)
2866 {
2867 boolean_t fuids_ok, sa_ok;
2868 uint64_t zplver = ZPL_VERSION;
2869 objset_t *os = NULL;
2870 char parentname[MAXNAMELEN];
2871 char *cp;
2872 spa_t *spa;
2873 uint64_t spa_vers;
2874 int error;
2875
2876 (void) strlcpy(parentname, dataset, sizeof (parentname));
2877 cp = strrchr(parentname, '/');
2878 ASSERT(cp != NULL);
2879 cp[0] = '\0';
2880
2881 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
2882 return (error);
2883
2884 spa_vers = spa_version(spa);
2885 spa_close(spa, FTAG);
2886
2887 zplver = zfs_zpl_version_map(spa_vers);
2888 fuids_ok = (zplver >= ZPL_VERSION_FUID);
2889 sa_ok = (zplver >= ZPL_VERSION_SA);
2890
2891 /*
2892 * Open parent object set so we can inherit zplprop values.
2893 */
2894 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
2895 return (error);
2896
2897 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
2898 zplprops, is_ci);
2899 dmu_objset_rele(os, FTAG);
2900 return (error);
2901 }
2902
2903 static int
2904 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
2905 nvlist_t *zplprops, boolean_t *is_ci)
2906 {
2907 boolean_t fuids_ok;
2908 boolean_t sa_ok;
2909 uint64_t zplver = ZPL_VERSION;
2910 int error;
2911
2912 zplver = zfs_zpl_version_map(spa_vers);
2913 fuids_ok = (zplver >= ZPL_VERSION_FUID);
2914 sa_ok = (zplver >= ZPL_VERSION_SA);
2915
2916 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
2917 createprops, zplprops, is_ci);
2918 return (error);
2919 }
2920
2921 /*
2922 * inputs:
2923 * zc_objset_type type of objset to create (fs vs zvol)
2924 * zc_name name of new objset
2925 * zc_value name of snapshot to clone from (may be empty)
2926 * zc_nvlist_src{_size} nvlist of properties to apply
2927 *
2928 * outputs: none
2929 */
2930 static int
2931 zfs_ioc_create(zfs_cmd_t *zc)
2932 {
2933 objset_t *clone;
2934 int error = 0;
2935 zfs_creat_t zct;
2936 nvlist_t *nvprops = NULL;
2937 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
2938 dmu_objset_type_t type = zc->zc_objset_type;
2939
2940 switch (type) {
2941
2942 case DMU_OST_ZFS:
2943 cbfunc = zfs_create_cb;
2944 break;
2945
2946 case DMU_OST_ZVOL:
2947 cbfunc = zvol_create_cb;
2948 break;
2949
2950 default:
2951 cbfunc = NULL;
2952 break;
2953 }
2954 if (strchr(zc->zc_name, '@') ||
2955 strchr(zc->zc_name, '%'))
2956 return (EINVAL);
2957
2958 if (zc->zc_nvlist_src != NULL &&
2959 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2960 zc->zc_iflags, &nvprops)) != 0)
2961 return (error);
2962
2963 zct.zct_zplprops = NULL;
2964 zct.zct_props = nvprops;
2965
2966 if (zc->zc_value[0] != '\0') {
2967 /*
2968 * We're creating a clone of an existing snapshot.
2969 */
2970 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
2971 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) {
2972 nvlist_free(nvprops);
2973 return (EINVAL);
2974 }
2975
2976 error = dmu_objset_hold(zc->zc_value, FTAG, &clone);
2977 if (error) {
2978 nvlist_free(nvprops);
2979 return (error);
2980 }
2981
2982 error = dmu_objset_clone(zc->zc_name, dmu_objset_ds(clone), 0);
2983 dmu_objset_rele(clone, FTAG);
2984 if (error) {
2985 nvlist_free(nvprops);
2986 return (error);
2987 }
2988 } else {
2989 boolean_t is_insensitive = B_FALSE;
2990
2991 if (cbfunc == NULL) {
2992 nvlist_free(nvprops);
2993 return (EINVAL);
2994 }
2995
2996 if (type == DMU_OST_ZVOL) {
2997 uint64_t volsize, volblocksize;
2998
2999 if (nvprops == NULL ||
3000 nvlist_lookup_uint64(nvprops,
3001 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
3002 &volsize) != 0) {
3003 nvlist_free(nvprops);
3004 return (EINVAL);
3005 }
3006
3007 if ((error = nvlist_lookup_uint64(nvprops,
3008 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3009 &volblocksize)) != 0 && error != ENOENT) {
3010 nvlist_free(nvprops);
3011 return (EINVAL);
3012 }
3013
3014 if (error != 0)
3015 volblocksize = zfs_prop_default_numeric(
3016 ZFS_PROP_VOLBLOCKSIZE);
3017
3018 if ((error = zvol_check_volblocksize(
3019 volblocksize)) != 0 ||
3020 (error = zvol_check_volsize(volsize,
3021 volblocksize)) != 0) {
3022 nvlist_free(nvprops);
3023 return (error);
3024 }
3025 } else if (type == DMU_OST_ZFS) {
3026 int error;
3027
3028 /*
3029 * We have to have normalization and
3030 * case-folding flags correct when we do the
3031 * file system creation, so go figure them out
3032 * now.
3033 */
3034 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3035 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3036 error = zfs_fill_zplprops(zc->zc_name, nvprops,
3037 zct.zct_zplprops, &is_insensitive);
3038 if (error != 0) {
3039 nvlist_free(nvprops);
3040 nvlist_free(zct.zct_zplprops);
3041 return (error);
3042 }
3043 }
3044 error = dmu_objset_create(zc->zc_name, type,
3045 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3046 nvlist_free(zct.zct_zplprops);
3047 }
3048
3049 /*
3050 * It would be nice to do this atomically.
3051 */
3052 if (error == 0) {
3053 error = zfs_set_prop_nvlist(zc->zc_name, ZPROP_SRC_LOCAL,
3054 nvprops, NULL);
3055 if (error != 0)
3056 (void) dmu_objset_destroy(zc->zc_name, B_FALSE);
3057 }
3058 nvlist_free(nvprops);
3059 return (error);
3060 }
3061
3062 /*
3063 * inputs:
3064 * zc_name name of filesystem
3065 * zc_value short name of snapshot
3066 * zc_cookie recursive flag
3067 * zc_nvlist_src[_size] property list
3068 *
3069 * outputs:
3070 * zc_value short snapname (i.e. part after the '@')
3071 */
3072 static int
3073 zfs_ioc_snapshot(zfs_cmd_t *zc)
3074 {
3075 nvlist_t *nvprops = NULL;
3076 int error;
3077 boolean_t recursive = zc->zc_cookie;
3078
3079 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
3080 return (EINVAL);
3081
3082 if (zc->zc_nvlist_src != NULL &&
3083 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
3084 zc->zc_iflags, &nvprops)) != 0)
3085 return (error);
3086
3087 error = zfs_check_userprops(zc->zc_name, nvprops);
3088 if (error)
3089 goto out;
3090
3091 if (!nvlist_empty(nvprops) &&
3092 zfs_earlier_version(zc->zc_name, SPA_VERSION_SNAP_PROPS)) {
3093 error = ENOTSUP;
3094 goto out;
3095 }
3096
3097 error = dmu_objset_snapshot(zc->zc_name, zc->zc_value, NULL,
3098 nvprops, recursive, B_FALSE, -1);
3099
3100 out:
3101 nvlist_free(nvprops);
3102 return (error);
3103 }
3104
3105 int
3106 zfs_unmount_snap(const char *name, void *arg)
3107 {
3108 vfs_t *vfsp = NULL;
3109
3110 if (arg) {
3111 char *snapname = arg;
3112 char *fullname = kmem_asprintf("%s@%s", name, snapname);
3113 vfsp = zfs_get_vfs(fullname);
3114 strfree(fullname);
3115 } else if (strchr(name, '@')) {
3116 vfsp = zfs_get_vfs(name);
3117 }
3118
3119 if (vfsp) {
3120 /*
3121 * Always force the unmount for snapshots.
3122 */
3123 int flag = MS_FORCE;
3124 int err;
3125
3126 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) {
3127 VFS_RELE(vfsp);
3128 return (err);
3129 }
3130 VFS_RELE(vfsp);
3131 if ((err = dounmount(vfsp, flag, kcred)) != 0)
3132 return (err);
3133 }
3134 return (0);
3135 }
3136
3137 /*
3138 * inputs:
3139 * zc_name name of filesystem, snaps must be under it
3140 * zc_nvlist_src[_size] full names of snapshots to destroy
3141 * zc_defer_destroy mark for deferred destroy
3142 *
3143 * outputs:
3144 * zc_name on failure, name of failed snapshot
3145 */
3146 static int
3147 zfs_ioc_destroy_snaps_nvl(zfs_cmd_t *zc)
3148 {
3149 int err, len;
3150 nvlist_t *nvl;
3151 nvpair_t *pair;
3152
3153 if ((err = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
3154 zc->zc_iflags, &nvl)) != 0)
3155 return (err);
3156
3157 len = strlen(zc->zc_name);
3158 for (pair = nvlist_next_nvpair(nvl, NULL); pair != NULL;
3159 pair = nvlist_next_nvpair(nvl, pair)) {
3160 const char *name = nvpair_name(pair);
3161 /*
3162 * The snap name must be underneath the zc_name. This ensures
3163 * that our permission checks were legitimate.
3164 */
3165 if (strncmp(zc->zc_name, name, len) != 0 ||
3166 (name[len] != '@' && name[len] != '/')) {
3167 nvlist_free(nvl);
3168 return (EINVAL);
3169 }
3170
3171 (void) zfs_unmount_snap(name, NULL);
3172 }
3173
3174 err = dmu_snapshots_destroy_nvl(nvl, zc->zc_defer_destroy,
3175 zc->zc_name);
3176 nvlist_free(nvl);
3177 return (err);
3178 }
3179
3180 /*
3181 * inputs:
3182 * zc_name name of dataset to destroy
3183 * zc_objset_type type of objset
3184 * zc_defer_destroy mark for deferred destroy
3185 *
3186 * outputs: none
3187 */
3188 static int
3189 zfs_ioc_destroy(zfs_cmd_t *zc)
3190 {
3191 int err;
3192 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) {
3193 err = zfs_unmount_snap(zc->zc_name, NULL);
3194 if (err)
3195 return (err);
3196 }
3197
3198 err = dmu_objset_destroy(zc->zc_name, zc->zc_defer_destroy);
3199 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3200 (void) zvol_remove_minor(zc->zc_name);
3201 return (err);
3202 }
3203
3204 /*
3205 * inputs:
3206 * zc_name name of dataset to rollback (to most recent snapshot)
3207 *
3208 * outputs: none
3209 */
3210 static int
3211 zfs_ioc_rollback(zfs_cmd_t *zc)
3212 {
3213 dsl_dataset_t *ds, *clone;
3214 int error;
3215 zfsvfs_t *zfsvfs;
3216 char *clone_name;
3217
3218 error = dsl_dataset_hold(zc->zc_name, FTAG, &ds);
3219 if (error)
3220 return (error);
3221
3222 /* must not be a snapshot */
3223 if (dsl_dataset_is_snapshot(ds)) {
3224 dsl_dataset_rele(ds, FTAG);
3225 return (EINVAL);
3226 }
3227
3228 /* must have a most recent snapshot */
3229 if (ds->ds_phys->ds_prev_snap_txg < TXG_INITIAL) {
3230 dsl_dataset_rele(ds, FTAG);
3231 return (EINVAL);
3232 }
3233
3234 /*
3235 * Create clone of most recent snapshot.
3236 */
3237 clone_name = kmem_asprintf("%s/%%rollback", zc->zc_name);
3238 error = dmu_objset_clone(clone_name, ds->ds_prev, DS_FLAG_INCONSISTENT);
3239 if (error)
3240 goto out;
3241
3242 error = dsl_dataset_own(clone_name, B_TRUE, FTAG, &clone);
3243 if (error)
3244 goto out;
3245
3246 /*
3247 * Do clone swap.
3248 */
3249 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
3250 error = zfs_suspend_fs(zfsvfs);
3251 if (error == 0) {
3252 int resume_err;
3253
3254 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
3255 error = dsl_dataset_clone_swap(clone, ds,
3256 B_TRUE);
3257 dsl_dataset_disown(ds, FTAG);
3258 ds = NULL;
3259 } else {
3260 error = EBUSY;
3261 }
3262 resume_err = zfs_resume_fs(zfsvfs, zc->zc_name);
3263 error = error ? error : resume_err;
3264 }
3265 VFS_RELE(zfsvfs->z_vfs);
3266 } else {
3267 if (dsl_dataset_tryown(ds, B_FALSE, FTAG)) {
3268 error = dsl_dataset_clone_swap(clone, ds, B_TRUE);
3269 dsl_dataset_disown(ds, FTAG);
3270 ds = NULL;
3271 } else {
3272 error = EBUSY;
3273 }
3274 }
3275
3276 /*
3277 * Destroy clone (which also closes it).
3278 */
3279 (void) dsl_dataset_destroy(clone, FTAG, B_FALSE);
3280
3281 out:
3282 strfree(clone_name);
3283 if (ds)
3284 dsl_dataset_rele(ds, FTAG);
3285 return (error);
3286 }
3287
3288 /*
3289 * inputs:
3290 * zc_name old name of dataset
3291 * zc_value new name of dataset
3292 * zc_cookie recursive flag (only valid for snapshots)
3293 *
3294 * outputs: none
3295 */
3296 static int
3297 zfs_ioc_rename(zfs_cmd_t *zc)
3298 {
3299 boolean_t recursive = zc->zc_cookie & 1;
3300
3301 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3302 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3303 strchr(zc->zc_value, '%'))
3304 return (EINVAL);
3305
3306 /*
3307 * Unmount snapshot unless we're doing a recursive rename,
3308 * in which case the dataset code figures out which snapshots
3309 * to unmount.
3310 */
3311 if (!recursive && strchr(zc->zc_name, '@') != NULL &&
3312 zc->zc_objset_type == DMU_OST_ZFS) {
3313 int err = zfs_unmount_snap(zc->zc_name, NULL);
3314 if (err)
3315 return (err);
3316 }
3317 if (zc->zc_objset_type == DMU_OST_ZVOL)
3318 (void) zvol_remove_minor(zc->zc_name);
3319 return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive));
3320 }
3321
3322 static int
3323 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3324 {
3325 const char *propname = nvpair_name(pair);
3326 boolean_t issnap = (strchr(dsname, '@') != NULL);
3327 zfs_prop_t prop = zfs_name_to_prop(propname);
3328 uint64_t intval;
3329 int err;
3330
3331 if (prop == ZPROP_INVAL) {
3332 if (zfs_prop_user(propname)) {
3333 if (err = zfs_secpolicy_write_perms(dsname,
3334 ZFS_DELEG_PERM_USERPROP, cr))
3335 return (err);
3336 return (0);
3337 }
3338
3339 if (!issnap && zfs_prop_userquota(propname)) {
3340 const char *perm = NULL;
3341 const char *uq_prefix =
3342 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3343 const char *gq_prefix =
3344 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3345
3346 if (strncmp(propname, uq_prefix,
3347 strlen(uq_prefix)) == 0) {
3348 perm = ZFS_DELEG_PERM_USERQUOTA;
3349 } else if (strncmp(propname, gq_prefix,
3350 strlen(gq_prefix)) == 0) {
3351 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3352 } else {
3353 /* USERUSED and GROUPUSED are read-only */
3354 return (EINVAL);
3355 }
3356
3357 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3358 return (err);
3359 return (0);
3360 }
3361
3362 return (EINVAL);
3363 }
3364
3365 if (issnap)
3366 return (EINVAL);
3367
3368 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3369 /*
3370 * dsl_prop_get_all_impl() returns properties in this
3371 * format.
3372 */
3373 nvlist_t *attrs;
3374 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3375 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3376 &pair) == 0);
3377 }
3378
3379 /*
3380 * Check that this value is valid for this pool version
3381 */
3382 switch (prop) {
3383 case ZFS_PROP_COMPRESSION:
3384 /*
3385 * If the user specified gzip compression, make sure
3386 * the SPA supports it. We ignore any errors here since
3387 * we'll catch them later.
3388 */
3389 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3390 nvpair_value_uint64(pair, &intval) == 0) {
3391 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3392 intval <= ZIO_COMPRESS_GZIP_9 &&
3393 zfs_earlier_version(dsname,
3394 SPA_VERSION_GZIP_COMPRESSION)) {
3395 return (ENOTSUP);
3396 }
3397
3398 if (intval == ZIO_COMPRESS_ZLE &&
3399 zfs_earlier_version(dsname,
3400 SPA_VERSION_ZLE_COMPRESSION))
3401 return (ENOTSUP);
3402
3403 /*
3404 * If this is a bootable dataset then
3405 * verify that the compression algorithm
3406 * is supported for booting. We must return
3407 * something other than ENOTSUP since it
3408 * implies a downrev pool version.
3409 */
3410 if (zfs_is_bootfs(dsname) &&
3411 !BOOTFS_COMPRESS_VALID(intval)) {
3412 return (ERANGE);
3413 }
3414 }
3415 break;
3416
3417 case ZFS_PROP_COPIES:
3418 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3419 return (ENOTSUP);
3420 break;
3421
3422 case ZFS_PROP_DEDUP:
3423 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3424 return (ENOTSUP);
3425 break;
3426
3427 case ZFS_PROP_SHARESMB:
3428 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3429 return (ENOTSUP);
3430 break;
3431
3432 case ZFS_PROP_ACLINHERIT:
3433 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3434 nvpair_value_uint64(pair, &intval) == 0) {
3435 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3436 zfs_earlier_version(dsname,
3437 SPA_VERSION_PASSTHROUGH_X))
3438 return (ENOTSUP);
3439 }
3440 break;
3441 }
3442
3443 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3444 }
3445
3446 /*
3447 * Removes properties from the given props list that fail permission checks
3448 * needed to clear them and to restore them in case of a receive error. For each
3449 * property, make sure we have both set and inherit permissions.
3450 *
3451 * Returns the first error encountered if any permission checks fail. If the
3452 * caller provides a non-NULL errlist, it also gives the complete list of names
3453 * of all the properties that failed a permission check along with the
3454 * corresponding error numbers. The caller is responsible for freeing the
3455 * returned errlist.
3456 *
3457 * If every property checks out successfully, zero is returned and the list
3458 * pointed at by errlist is NULL.
3459 */
3460 static int
3461 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3462 {
3463 zfs_cmd_t *zc;
3464 nvpair_t *pair, *next_pair;
3465 nvlist_t *errors;
3466 int err, rv = 0;
3467
3468 if (props == NULL)
3469 return (0);
3470
3471 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3472
3473 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3474 (void) strcpy(zc->zc_name, dataset);
3475 pair = nvlist_next_nvpair(props, NULL);
3476 while (pair != NULL) {
3477 next_pair = nvlist_next_nvpair(props, pair);
3478
3479 (void) strcpy(zc->zc_value, nvpair_name(pair));
3480 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3481 (err = zfs_secpolicy_inherit(zc, CRED())) != 0) {
3482 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3483 VERIFY(nvlist_add_int32(errors,
3484 zc->zc_value, err) == 0);
3485 }
3486 pair = next_pair;
3487 }
3488 kmem_free(zc, sizeof (zfs_cmd_t));
3489
3490 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3491 nvlist_free(errors);
3492 errors = NULL;
3493 } else {
3494 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3495 }
3496
3497 if (errlist == NULL)
3498 nvlist_free(errors);
3499 else
3500 *errlist = errors;
3501
3502 return (rv);
3503 }
3504
3505 static boolean_t
3506 propval_equals(nvpair_t *p1, nvpair_t *p2)
3507 {
3508 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3509 /* dsl_prop_get_all_impl() format */
3510 nvlist_t *attrs;
3511 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3512 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3513 &p1) == 0);
3514 }
3515
3516 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3517 nvlist_t *attrs;
3518 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3519 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3520 &p2) == 0);
3521 }
3522
3523 if (nvpair_type(p1) != nvpair_type(p2))
3524 return (B_FALSE);
3525
3526 if (nvpair_type(p1) == DATA_TYPE_STRING) {
3527 char *valstr1, *valstr2;
3528
3529 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
3530 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
3531 return (strcmp(valstr1, valstr2) == 0);
3532 } else {
3533 uint64_t intval1, intval2;
3534
3535 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
3536 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
3537 return (intval1 == intval2);
3538 }
3539 }
3540
3541 /*
3542 * Remove properties from props if they are not going to change (as determined
3543 * by comparison with origprops). Remove them from origprops as well, since we
3544 * do not need to clear or restore properties that won't change.
3545 */
3546 static void
3547 props_reduce(nvlist_t *props, nvlist_t *origprops)
3548 {
3549 nvpair_t *pair, *next_pair;
3550
3551 if (origprops == NULL)
3552 return; /* all props need to be received */
3553
3554 pair = nvlist_next_nvpair(props, NULL);
3555 while (pair != NULL) {
3556 const char *propname = nvpair_name(pair);
3557 nvpair_t *match;
3558
3559 next_pair = nvlist_next_nvpair(props, pair);
3560
3561 if ((nvlist_lookup_nvpair(origprops, propname,
3562 &match) != 0) || !propval_equals(pair, match))
3563 goto next; /* need to set received value */
3564
3565 /* don't clear the existing received value */
3566 (void) nvlist_remove_nvpair(origprops, match);
3567 /* don't bother receiving the property */
3568 (void) nvlist_remove_nvpair(props, pair);
3569 next:
3570 pair = next_pair;
3571 }
3572 }
3573
3574 #ifdef DEBUG
3575 static boolean_t zfs_ioc_recv_inject_err;
3576 #endif
3577
3578 /*
3579 * inputs:
3580 * zc_name name of containing filesystem
3581 * zc_nvlist_src{_size} nvlist of properties to apply
3582 * zc_value name of snapshot to create
3583 * zc_string name of clone origin (if DRR_FLAG_CLONE)
3584 * zc_cookie file descriptor to recv from
3585 * zc_begin_record the BEGIN record of the stream (not byteswapped)
3586 * zc_guid force flag
3587 * zc_cleanup_fd cleanup-on-exit file descriptor
3588 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
3589 *
3590 * outputs:
3591 * zc_cookie number of bytes read
3592 * zc_nvlist_dst{_size} error for each unapplied received property
3593 * zc_obj zprop_errflags_t
3594 * zc_action_handle handle for this guid/ds mapping
3595 */
3596 static int
3597 zfs_ioc_recv(zfs_cmd_t *zc)
3598 {
3599 file_t *fp;
3600 objset_t *os;
3601 dmu_recv_cookie_t drc;
3602 boolean_t force = (boolean_t)zc->zc_guid;
3603 int fd;
3604 int error = 0;
3605 int props_error = 0;
3606 nvlist_t *errors;
3607 offset_t off;
3608 nvlist_t *props = NULL; /* sent properties */
3609 nvlist_t *origprops = NULL; /* existing properties */
3610 objset_t *origin = NULL;
3611 char *tosnap;
3612 char tofs[ZFS_MAXNAMELEN];
3613 boolean_t first_recvd_props = B_FALSE;
3614
3615 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3616 strchr(zc->zc_value, '@') == NULL ||
3617 strchr(zc->zc_value, '%'))
3618 return (EINVAL);
3619
3620 (void) strcpy(tofs, zc->zc_value);
3621 tosnap = strchr(tofs, '@');
3622 *tosnap++ = '\0';
3623
3624 if (zc->zc_nvlist_src != NULL &&
3625 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
3626 zc->zc_iflags, &props)) != 0)
3627 return (error);
3628
3629 fd = zc->zc_cookie;
3630 fp = getf(fd);
3631 if (fp == NULL) {
3632 nvlist_free(props);
3633 return (EBADF);
3634 }
3635
3636 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3637
3638 if (props && dmu_objset_hold(tofs, FTAG, &os) == 0) {
3639 if ((spa_version(os->os_spa) >= SPA_VERSION_RECVD_PROPS) &&
3640 !dsl_prop_get_hasrecvd(os)) {
3641 first_recvd_props = B_TRUE;
3642 }
3643
3644 /*
3645 * If new received properties are supplied, they are to
3646 * completely replace the existing received properties, so stash
3647 * away the existing ones.
3648 */
3649 if (dsl_prop_get_received(os, &origprops) == 0) {
3650 nvlist_t *errlist = NULL;
3651 /*
3652 * Don't bother writing a property if its value won't
3653 * change (and avoid the unnecessary security checks).
3654 *
3655 * The first receive after SPA_VERSION_RECVD_PROPS is a
3656 * special case where we blow away all local properties
3657 * regardless.
3658 */
3659 if (!first_recvd_props)
3660 props_reduce(props, origprops);
3661 if (zfs_check_clearable(tofs, origprops,
3662 &errlist) != 0)
3663 (void) nvlist_merge(errors, errlist, 0);
3664 nvlist_free(errlist);
3665 }
3666
3667 dmu_objset_rele(os, FTAG);
3668 }
3669
3670 if (zc->zc_string[0]) {
3671 error = dmu_objset_hold(zc->zc_string, FTAG, &origin);
3672 if (error)
3673 goto out;
3674 }
3675
3676 error = dmu_recv_begin(tofs, tosnap, zc->zc_top_ds,
3677 &zc->zc_begin_record, force, origin, &drc);
3678 if (origin)
3679 dmu_objset_rele(origin, FTAG);
3680 if (error)
3681 goto out;
3682
3683 /*
3684 * Set properties before we receive the stream so that they are applied
3685 * to the new data. Note that we must call dmu_recv_stream() if
3686 * dmu_recv_begin() succeeds.
3687 */
3688 if (props) {
3689 nvlist_t *errlist;
3690
3691 if (dmu_objset_from_ds(drc.drc_logical_ds, &os) == 0) {
3692 if (drc.drc_newfs) {
3693 if (spa_version(os->os_spa) >=
3694 SPA_VERSION_RECVD_PROPS)
3695 first_recvd_props = B_TRUE;
3696 } else if (origprops != NULL) {
3697 if (clear_received_props(os, tofs, origprops,
3698 first_recvd_props ? NULL : props) != 0)
3699 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
3700 } else {
3701 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
3702 }
3703 dsl_prop_set_hasrecvd(os);
3704 } else if (!drc.drc_newfs) {
3705 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
3706 }
3707
3708 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
3709 props, &errlist);
3710 (void) nvlist_merge(errors, errlist, 0);
3711 nvlist_free(errlist);
3712 }
3713
3714 if (fit_error_list(zc, &errors) != 0 || put_nvlist(zc, errors) != 0) {
3715 /*
3716 * Caller made zc->zc_nvlist_dst less than the minimum expected
3717 * size or supplied an invalid address.
3718 */
3719 props_error = EINVAL;
3720 }
3721
3722 off = fp->f_offset;
3723 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
3724 &zc->zc_action_handle);
3725
3726 if (error == 0) {
3727 zfsvfs_t *zfsvfs = NULL;
3728
3729 if (getzfsvfs(tofs, &zfsvfs) == 0) {
3730 /* online recv */
3731 int end_err;
3732
3733 error = zfs_suspend_fs(zfsvfs);
3734 /*
3735 * If the suspend fails, then the recv_end will
3736 * likely also fail, and clean up after itself.
3737 */
3738 end_err = dmu_recv_end(&drc);
3739 if (error == 0)
3740 error = zfs_resume_fs(zfsvfs, tofs);
3741 error = error ? error : end_err;
3742 VFS_RELE(zfsvfs->z_vfs);
3743 } else {
3744 error = dmu_recv_end(&drc);
3745 }
3746 }
3747
3748 zc->zc_cookie = off - fp->f_offset;
3749 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
3750 fp->f_offset = off;
3751
3752 #ifdef DEBUG
3753 if (zfs_ioc_recv_inject_err) {
3754 zfs_ioc_recv_inject_err = B_FALSE;
3755 error = 1;
3756 }
3757 #endif
3758 /*
3759 * On error, restore the original props.
3760 */
3761 if (error && props) {
3762 if (dmu_objset_hold(tofs, FTAG, &os) == 0) {
3763 if (clear_received_props(os, tofs, props, NULL) != 0) {
3764 /*
3765 * We failed to clear the received properties.
3766 * Since we may have left a $recvd value on the
3767 * system, we can't clear the $hasrecvd flag.
3768 */
3769 zc->zc_obj |= ZPROP_ERR_NORESTORE;
3770 } else if (first_recvd_props) {
3771 dsl_prop_unset_hasrecvd(os);
3772 }
3773 dmu_objset_rele(os, FTAG);
3774 } else if (!drc.drc_newfs) {
3775 /* We failed to clear the received properties. */
3776 zc->zc_obj |= ZPROP_ERR_NORESTORE;
3777 }
3778
3779 if (origprops == NULL && !drc.drc_newfs) {
3780 /* We failed to stash the original properties. */
3781 zc->zc_obj |= ZPROP_ERR_NORESTORE;
3782 }
3783
3784 /*
3785 * dsl_props_set() will not convert RECEIVED to LOCAL on or
3786 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
3787 * explictly if we're restoring local properties cleared in the
3788 * first new-style receive.
3789 */
3790 if (origprops != NULL &&
3791 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
3792 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
3793 origprops, NULL) != 0) {
3794 /*
3795 * We stashed the original properties but failed to
3796 * restore them.
3797 */
3798 zc->zc_obj |= ZPROP_ERR_NORESTORE;
3799 }
3800 }
3801 out:
3802 nvlist_free(props);
3803 nvlist_free(origprops);
3804 nvlist_free(errors);
3805 releasef(fd);
3806
3807 if (error == 0)
3808 error = props_error;
3809
3810 return (error);
3811 }
3812
3813 /*
3814 * inputs:
3815 * zc_name name of snapshot to send
3816 * zc_cookie file descriptor to send stream to
3817 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
3818 * zc_sendobj objsetid of snapshot to send
3819 * zc_fromobj objsetid of incremental fromsnap (may be zero)
3820 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
3821 * output size in zc_objset_type.
3822 *
3823 * outputs: none
3824 */
3825 static int
3826 zfs_ioc_send(zfs_cmd_t *zc)
3827 {
3828 objset_t *fromsnap = NULL;
3829 objset_t *tosnap;
3830 int error;
3831 offset_t off;
3832 dsl_dataset_t *ds;
3833 dsl_dataset_t *dsfrom = NULL;
3834 spa_t *spa;
3835 dsl_pool_t *dp;
3836 boolean_t estimate = (zc->zc_guid != 0);
3837
3838 error = spa_open(zc->zc_name, &spa, FTAG);
3839 if (error)
3840 return (error);
3841
3842 dp = spa_get_dsl(spa);
3843 rw_enter(&dp->dp_config_rwlock, RW_READER);
3844 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
3845 rw_exit(&dp->dp_config_rwlock);
3846 if (error) {
3847 spa_close(spa, FTAG);
3848 return (error);
3849 }
3850
3851 error = dmu_objset_from_ds(ds, &tosnap);
3852 if (error) {
3853 dsl_dataset_rele(ds, FTAG);
3854 spa_close(spa, FTAG);
3855 return (error);
3856 }
3857
3858 if (zc->zc_fromobj != 0) {
3859 rw_enter(&dp->dp_config_rwlock, RW_READER);
3860 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj, FTAG, &dsfrom);
3861 rw_exit(&dp->dp_config_rwlock);
3862 spa_close(spa, FTAG);
3863 if (error) {
3864 dsl_dataset_rele(ds, FTAG);
3865 return (error);
3866 }
3867 error = dmu_objset_from_ds(dsfrom, &fromsnap);
3868 if (error) {
3869 dsl_dataset_rele(dsfrom, FTAG);
3870 dsl_dataset_rele(ds, FTAG);
3871 return (error);
3872 }
3873 } else {
3874 spa_close(spa, FTAG);
3875 }
3876
3877 if (estimate) {
3878 error = dmu_send_estimate(tosnap, fromsnap, zc->zc_obj,
3879 &zc->zc_objset_type);
3880 } else {
3881 file_t *fp = getf(zc->zc_cookie);
3882 if (fp == NULL) {
3883 dsl_dataset_rele(ds, FTAG);
3884 if (dsfrom)
3885 dsl_dataset_rele(dsfrom, FTAG);
3886 return (EBADF);
3887 }
3888
3889 off = fp->f_offset;
3890 error = dmu_send(tosnap, fromsnap, zc->zc_obj,
3891 zc->zc_cookie, fp->f_vnode, &off);
3892
3893 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
3894 fp->f_offset = off;
3895 releasef(zc->zc_cookie);
3896 }
3897 if (dsfrom)
3898 dsl_dataset_rele(dsfrom, FTAG);
3899 dsl_dataset_rele(ds, FTAG);
3900 return (error);
3901 }
3902
3903 /*
3904 * inputs:
3905 * zc_name name of snapshot on which to report progress
3906 * zc_cookie file descriptor of send stream
3907 *
3908 * outputs:
3909 * zc_cookie number of bytes written in send stream thus far
3910 */
3911 static int
3912 zfs_ioc_send_progress(zfs_cmd_t *zc)
3913 {
3914 dsl_dataset_t *ds;
3915 dmu_sendarg_t *dsp = NULL;
3916 int error;
3917
3918 if ((error = dsl_dataset_hold(zc->zc_name, FTAG, &ds)) != 0)
3919 return (error);
3920
3921 mutex_enter(&ds->ds_sendstream_lock);
3922
3923 /*
3924 * Iterate over all the send streams currently active on this dataset.
3925 * If there's one which matches the specified file descriptor _and_ the
3926 * stream was started by the current process, return the progress of
3927 * that stream.
3928 */
3929 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
3930 dsp = list_next(&ds->ds_sendstreams, dsp)) {
3931 if (dsp->dsa_outfd == zc->zc_cookie &&
3932 dsp->dsa_proc == curproc)
3933 break;
3934 }
3935
3936 if (dsp != NULL)
3937 zc->zc_cookie = *(dsp->dsa_off);
3938 else
3939 error = ENOENT;
3940
3941 mutex_exit(&ds->ds_sendstream_lock);
3942 dsl_dataset_rele(ds, FTAG);
3943 return (error);
3944 }
3945
3946 static int
3947 zfs_ioc_inject_fault(zfs_cmd_t *zc)
3948 {
3949 int id, error;
3950
3951 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
3952 &zc->zc_inject_record);
3953
3954 if (error == 0)
3955 zc->zc_guid = (uint64_t)id;
3956
3957 return (error);
3958 }
3959
3960 static int
3961 zfs_ioc_clear_fault(zfs_cmd_t *zc)
3962 {
3963 return (zio_clear_fault((int)zc->zc_guid));
3964 }
3965
3966 static int
3967 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
3968 {
3969 int id = (int)zc->zc_guid;
3970 int error;
3971
3972 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
3973 &zc->zc_inject_record);
3974
3975 zc->zc_guid = id;
3976
3977 return (error);
3978 }
3979
3980 static int
3981 zfs_ioc_error_log(zfs_cmd_t *zc)
3982 {
3983 spa_t *spa;
3984 int error;
3985 size_t count = (size_t)zc->zc_nvlist_dst_size;
3986
3987 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
3988 return (error);
3989
3990 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
3991 &count);
3992 if (error == 0)
3993 zc->zc_nvlist_dst_size = count;
3994 else
3995 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
3996
3997 spa_close(spa, FTAG);
3998
3999 return (error);
4000 }
4001
4002 static int
4003 zfs_ioc_clear(zfs_cmd_t *zc)
4004 {
4005 spa_t *spa;
4006 vdev_t *vd;
4007 int error;
4008
4009 /*
4010 * On zpool clear we also fix up missing slogs
4011 */
4012 mutex_enter(&spa_namespace_lock);
4013 spa = spa_lookup(zc->zc_name);
4014 if (spa == NULL) {
4015 mutex_exit(&spa_namespace_lock);
4016 return (EIO);
4017 }
4018 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4019 /* we need to let spa_open/spa_load clear the chains */
4020 spa_set_log_state(spa, SPA_LOG_CLEAR);
4021 }
4022 spa->spa_last_open_failed = 0;
4023 mutex_exit(&spa_namespace_lock);
4024
4025 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4026 error = spa_open(zc->zc_name, &spa, FTAG);
4027 } else {
4028 nvlist_t *policy;
4029 nvlist_t *config = NULL;
4030
4031 if (zc->zc_nvlist_src == NULL)
4032 return (EINVAL);
4033
4034 if ((error = get_nvlist(zc->zc_nvlist_src,
4035 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4036 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4037 policy, &config);
4038 if (config != NULL) {
4039 int err;
4040
4041 if ((err = put_nvlist(zc, config)) != 0)
4042 error = err;
4043 nvlist_free(config);
4044 }
4045 nvlist_free(policy);
4046 }
4047 }
4048
4049 if (error)
4050 return (error);
4051
4052 spa_vdev_state_enter(spa, SCL_NONE);
4053
4054 if (zc->zc_guid == 0) {
4055 vd = NULL;
4056 } else {
4057 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4058 if (vd == NULL) {
4059 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4060 spa_close(spa, FTAG);
4061 return (ENODEV);
4062 }
4063 }
4064
4065 vdev_clear(spa, vd);
4066
4067 (void) spa_vdev_state_exit(spa, NULL, 0);
4068
4069 /*
4070 * Resume any suspended I/Os.
4071 */
4072 if (zio_resume(spa) != 0)
4073 error = EIO;
4074
4075 spa_close(spa, FTAG);
4076
4077 return (error);
4078 }
4079
4080 static int
4081 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4082 {
4083 spa_t *spa;
4084 int error;
4085
4086 error = spa_open(zc->zc_name, &spa, FTAG);
4087 if (error)
4088 return (error);
4089
4090 spa_vdev_state_enter(spa, SCL_NONE);
4091 vdev_reopen(spa->spa_root_vdev);
4092 (void) spa_vdev_state_exit(spa, NULL, 0);
4093 spa_close(spa, FTAG);
4094 return (0);
4095 }
4096 /*
4097 * inputs:
4098 * zc_name name of filesystem
4099 * zc_value name of origin snapshot
4100 *
4101 * outputs:
4102 * zc_string name of conflicting snapshot, if there is one
4103 */
4104 static int
4105 zfs_ioc_promote(zfs_cmd_t *zc)
4106 {
4107 char *cp;
4108
4109 /*
4110 * We don't need to unmount *all* the origin fs's snapshots, but
4111 * it's easier.
4112 */
4113 cp = strchr(zc->zc_value, '@');
4114 if (cp)
4115 *cp = '\0';
4116 (void) dmu_objset_find(zc->zc_value,
4117 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS);
4118 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4119 }
4120
4121 /*
4122 * Retrieve a single {user|group}{used|quota}@... property.
4123 *
4124 * inputs:
4125 * zc_name name of filesystem
4126 * zc_objset_type zfs_userquota_prop_t
4127 * zc_value domain name (eg. "S-1-234-567-89")
4128 * zc_guid RID/UID/GID
4129 *
4130 * outputs:
4131 * zc_cookie property value
4132 */
4133 static int
4134 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4135 {
4136 zfsvfs_t *zfsvfs;
4137 int error;
4138
4139 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4140 return (EINVAL);
4141
4142 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4143 if (error)
4144 return (error);
4145
4146 error = zfs_userspace_one(zfsvfs,
4147 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4148 zfsvfs_rele(zfsvfs, FTAG);
4149
4150 return (error);
4151 }
4152
4153 /*
4154 * inputs:
4155 * zc_name name of filesystem
4156 * zc_cookie zap cursor
4157 * zc_objset_type zfs_userquota_prop_t
4158 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4159 *
4160 * outputs:
4161 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4162 * zc_cookie zap cursor
4163 */
4164 static int
4165 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4166 {
4167 zfsvfs_t *zfsvfs;
4168 int bufsize = zc->zc_nvlist_dst_size;
4169
4170 if (bufsize <= 0)
4171 return (ENOMEM);
4172
4173 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4174 if (error)
4175 return (error);
4176
4177 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4178
4179 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4180 buf, &zc->zc_nvlist_dst_size);
4181
4182 if (error == 0) {
4183 error = xcopyout(buf,
4184 (void *)(uintptr_t)zc->zc_nvlist_dst,
4185 zc->zc_nvlist_dst_size);
4186 }
4187 kmem_free(buf, bufsize);
4188 zfsvfs_rele(zfsvfs, FTAG);
4189
4190 return (error);
4191 }
4192
4193 /*
4194 * inputs:
4195 * zc_name name of filesystem
4196 *
4197 * outputs:
4198 * none
4199 */
4200 static int
4201 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4202 {
4203 objset_t *os;
4204 int error = 0;
4205 zfsvfs_t *zfsvfs;
4206
4207 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4208 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4209 /*
4210 * If userused is not enabled, it may be because the
4211 * objset needs to be closed & reopened (to grow the
4212 * objset_phys_t). Suspend/resume the fs will do that.
4213 */
4214 error = zfs_suspend_fs(zfsvfs);
4215 if (error == 0)
4216 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4217 }
4218 if (error == 0)
4219 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4220 VFS_RELE(zfsvfs->z_vfs);
4221 } else {
4222 /* XXX kind of reading contents without owning */
4223 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4224 if (error)
4225 return (error);
4226
4227 error = dmu_objset_userspace_upgrade(os);
4228 dmu_objset_rele(os, FTAG);
4229 }
4230
4231 return (error);
4232 }
4233
4234 /*
4235 * We don't want to have a hard dependency
4236 * against some special symbols in sharefs
4237 * nfs, and smbsrv. Determine them if needed when
4238 * the first file system is shared.
4239 * Neither sharefs, nfs or smbsrv are unloadable modules.
4240 */
4241 int (*znfsexport_fs)(void *arg);
4242 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4243 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4244
4245 int zfs_nfsshare_inited;
4246 int zfs_smbshare_inited;
4247
4248 ddi_modhandle_t nfs_mod;
4249 ddi_modhandle_t sharefs_mod;
4250 ddi_modhandle_t smbsrv_mod;
4251 kmutex_t zfs_share_lock;
4252
4253 static int
4254 zfs_init_sharefs()
4255 {
4256 int error;
4257
4258 ASSERT(MUTEX_HELD(&zfs_share_lock));
4259 /* Both NFS and SMB shares also require sharetab support. */
4260 if (sharefs_mod == NULL && ((sharefs_mod =
4261 ddi_modopen("fs/sharefs",
4262 KRTLD_MODE_FIRST, &error)) == NULL)) {
4263 return (ENOSYS);
4264 }
4265 if (zshare_fs == NULL && ((zshare_fs =
4266 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4267 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4268 return (ENOSYS);
4269 }
4270 return (0);
4271 }
4272
4273 static int
4274 zfs_ioc_share(zfs_cmd_t *zc)
4275 {
4276 int error;
4277 int opcode;
4278
4279 switch (zc->zc_share.z_sharetype) {
4280 case ZFS_SHARE_NFS:
4281 case ZFS_UNSHARE_NFS:
4282 if (zfs_nfsshare_inited == 0) {
4283 mutex_enter(&zfs_share_lock);
4284 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4285 KRTLD_MODE_FIRST, &error)) == NULL)) {
4286 mutex_exit(&zfs_share_lock);
4287 return (ENOSYS);
4288 }
4289 if (znfsexport_fs == NULL &&
4290 ((znfsexport_fs = (int (*)(void *))
4291 ddi_modsym(nfs_mod,
4292 "nfs_export", &error)) == NULL)) {
4293 mutex_exit(&zfs_share_lock);
4294 return (ENOSYS);
4295 }
4296 error = zfs_init_sharefs();
4297 if (error) {
4298 mutex_exit(&zfs_share_lock);
4299 return (ENOSYS);
4300 }
4301 zfs_nfsshare_inited = 1;
4302 mutex_exit(&zfs_share_lock);
4303 }
4304 break;
4305 case ZFS_SHARE_SMB:
4306 case ZFS_UNSHARE_SMB:
4307 if (zfs_smbshare_inited == 0) {
4308 mutex_enter(&zfs_share_lock);
4309 if (smbsrv_mod == NULL && ((smbsrv_mod =
4310 ddi_modopen("drv/smbsrv",
4311 KRTLD_MODE_FIRST, &error)) == NULL)) {
4312 mutex_exit(&zfs_share_lock);
4313 return (ENOSYS);
4314 }
4315 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4316 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4317 "smb_server_share", &error)) == NULL)) {
4318 mutex_exit(&zfs_share_lock);
4319 return (ENOSYS);
4320 }
4321 error = zfs_init_sharefs();
4322 if (error) {
4323 mutex_exit(&zfs_share_lock);
4324 return (ENOSYS);
4325 }
4326 zfs_smbshare_inited = 1;
4327 mutex_exit(&zfs_share_lock);
4328 }
4329 break;
4330 default:
4331 return (EINVAL);
4332 }
4333
4334 switch (zc->zc_share.z_sharetype) {
4335 case ZFS_SHARE_NFS:
4336 case ZFS_UNSHARE_NFS:
4337 if (error =
4338 znfsexport_fs((void *)
4339 (uintptr_t)zc->zc_share.z_exportdata))
4340 return (error);
4341 break;
4342 case ZFS_SHARE_SMB:
4343 case ZFS_UNSHARE_SMB:
4344 if (error = zsmbexport_fs((void *)
4345 (uintptr_t)zc->zc_share.z_exportdata,
4346 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4347 B_TRUE: B_FALSE)) {
4348 return (error);
4349 }
4350 break;
4351 }
4352
4353 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4354 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4355 SHAREFS_ADD : SHAREFS_REMOVE;
4356
4357 /*
4358 * Add or remove share from sharetab
4359 */
4360 error = zshare_fs(opcode,
4361 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4362 zc->zc_share.z_sharemax);
4363
4364 return (error);
4365
4366 }
4367
4368 ace_t full_access[] = {
4369 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4370 };
4371
4372 /*
4373 * inputs:
4374 * zc_name name of containing filesystem
4375 * zc_obj object # beyond which we want next in-use object #
4376 *
4377 * outputs:
4378 * zc_obj next in-use object #
4379 */
4380 static int
4381 zfs_ioc_next_obj(zfs_cmd_t *zc)
4382 {
4383 objset_t *os = NULL;
4384 int error;
4385
4386 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4387 if (error)
4388 return (error);
4389
4390 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4391 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4392
4393 dmu_objset_rele(os, FTAG);
4394 return (error);
4395 }
4396
4397 /*
4398 * inputs:
4399 * zc_name name of filesystem
4400 * zc_value prefix name for snapshot
4401 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4402 *
4403 * outputs:
4404 */
4405 static int
4406 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4407 {
4408 char *snap_name;
4409 int error;
4410
4411 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
4412 (u_longlong_t)ddi_get_lbolt64());
4413
4414 if (strlen(snap_name) >= MAXNAMELEN) {
4415 strfree(snap_name);
4416 return (E2BIG);
4417 }
4418
4419 error = dmu_objset_snapshot(zc->zc_name, snap_name, snap_name,
4420 NULL, B_FALSE, B_TRUE, zc->zc_cleanup_fd);
4421 if (error != 0) {
4422 strfree(snap_name);
4423 return (error);
4424 }
4425
4426 (void) strcpy(zc->zc_value, snap_name);
4427 strfree(snap_name);
4428 return (0);
4429 }
4430
4431 /*
4432 * inputs:
4433 * zc_name name of "to" snapshot
4434 * zc_value name of "from" snapshot
4435 * zc_cookie file descriptor to write diff data on
4436 *
4437 * outputs:
4438 * dmu_diff_record_t's to the file descriptor
4439 */
4440 static int
4441 zfs_ioc_diff(zfs_cmd_t *zc)
4442 {
4443 objset_t *fromsnap;
4444 objset_t *tosnap;
4445 file_t *fp;
4446 offset_t off;
4447 int error;
4448
4449 error = dmu_objset_hold(zc->zc_name, FTAG, &tosnap);
4450 if (error)
4451 return (error);
4452
4453 error = dmu_objset_hold(zc->zc_value, FTAG, &fromsnap);
4454 if (error) {
4455 dmu_objset_rele(tosnap, FTAG);
4456 return (error);
4457 }
4458
4459 fp = getf(zc->zc_cookie);
4460 if (fp == NULL) {
4461 dmu_objset_rele(fromsnap, FTAG);
4462 dmu_objset_rele(tosnap, FTAG);
4463 return (EBADF);
4464 }
4465
4466 off = fp->f_offset;
4467
4468 error = dmu_diff(tosnap, fromsnap, fp->f_vnode, &off);
4469
4470 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4471 fp->f_offset = off;
4472 releasef(zc->zc_cookie);
4473
4474 dmu_objset_rele(fromsnap, FTAG);
4475 dmu_objset_rele(tosnap, FTAG);
4476 return (error);
4477 }
4478
4479 /*
4480 * Remove all ACL files in shares dir
4481 */
4482 static int
4483 zfs_smb_acl_purge(znode_t *dzp)
4484 {
4485 zap_cursor_t zc;
4486 zap_attribute_t zap;
4487 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4488 int error;
4489
4490 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4491 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4492 zap_cursor_advance(&zc)) {
4493 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4494 NULL, 0)) != 0)
4495 break;
4496 }
4497 zap_cursor_fini(&zc);
4498 return (error);
4499 }
4500
4501 static int
4502 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4503 {
4504 vnode_t *vp;
4505 znode_t *dzp;
4506 vnode_t *resourcevp = NULL;
4507 znode_t *sharedir;
4508 zfsvfs_t *zfsvfs;
4509 nvlist_t *nvlist;
4510 char *src, *target;
4511 vattr_t vattr;
4512 vsecattr_t vsec;
4513 int error = 0;
4514
4515 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4516 NO_FOLLOW, NULL, &vp)) != 0)
4517 return (error);
4518
4519 /* Now make sure mntpnt and dataset are ZFS */
4520
4521 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4522 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4523 zc->zc_name) != 0)) {
4524 VN_RELE(vp);
4525 return (EINVAL);
4526 }
4527
4528 dzp = VTOZ(vp);
4529 zfsvfs = dzp->z_zfsvfs;
4530 ZFS_ENTER(zfsvfs);
4531
4532 /*
4533 * Create share dir if its missing.
4534 */
4535 mutex_enter(&zfsvfs->z_lock);
4536 if (zfsvfs->z_shares_dir == 0) {
4537 dmu_tx_t *tx;
4538
4539 tx = dmu_tx_create(zfsvfs->z_os);
4540 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
4541 ZFS_SHARES_DIR);
4542 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
4543 error = dmu_tx_assign(tx, TXG_WAIT);
4544 if (error) {
4545 dmu_tx_abort(tx);
4546 } else {
4547 error = zfs_create_share_dir(zfsvfs, tx);
4548 dmu_tx_commit(tx);
4549 }
4550 if (error) {
4551 mutex_exit(&zfsvfs->z_lock);
4552 VN_RELE(vp);
4553 ZFS_EXIT(zfsvfs);
4554 return (error);
4555 }
4556 }
4557 mutex_exit(&zfsvfs->z_lock);
4558
4559 ASSERT(zfsvfs->z_shares_dir);
4560 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
4561 VN_RELE(vp);
4562 ZFS_EXIT(zfsvfs);
4563 return (error);
4564 }
4565
4566 switch (zc->zc_cookie) {
4567 case ZFS_SMB_ACL_ADD:
4568 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
4569 vattr.va_type = VREG;
4570 vattr.va_mode = S_IFREG|0777;
4571 vattr.va_uid = 0;
4572 vattr.va_gid = 0;
4573
4574 vsec.vsa_mask = VSA_ACE;
4575 vsec.vsa_aclentp = &full_access;
4576 vsec.vsa_aclentsz = sizeof (full_access);
4577 vsec.vsa_aclcnt = 1;
4578
4579 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
4580 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
4581 if (resourcevp)
4582 VN_RELE(resourcevp);
4583 break;
4584
4585 case ZFS_SMB_ACL_REMOVE:
4586 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
4587 NULL, 0);
4588 break;
4589
4590 case ZFS_SMB_ACL_RENAME:
4591 if ((error = get_nvlist(zc->zc_nvlist_src,
4592 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
4593 VN_RELE(vp);
4594 ZFS_EXIT(zfsvfs);
4595 return (error);
4596 }
4597 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
4598 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
4599 &target)) {
4600 VN_RELE(vp);
4601 VN_RELE(ZTOV(sharedir));
4602 ZFS_EXIT(zfsvfs);
4603 nvlist_free(nvlist);
4604 return (error);
4605 }
4606 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
4607 kcred, NULL, 0);
4608 nvlist_free(nvlist);
4609 break;
4610
4611 case ZFS_SMB_ACL_PURGE:
4612 error = zfs_smb_acl_purge(sharedir);
4613 break;
4614
4615 default:
4616 error = EINVAL;
4617 break;
4618 }
4619
4620 VN_RELE(vp);
4621 VN_RELE(ZTOV(sharedir));
4622
4623 ZFS_EXIT(zfsvfs);
4624
4625 return (error);
4626 }
4627
4628 /*
4629 * inputs:
4630 * zc_name name of filesystem
4631 * zc_value short name of snap
4632 * zc_string user-supplied tag for this hold
4633 * zc_cookie recursive flag
4634 * zc_temphold set if hold is temporary
4635 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4636 * zc_sendobj if non-zero, the objid for zc_name@zc_value
4637 * zc_createtxg if zc_sendobj is non-zero, snap must have zc_createtxg
4638 *
4639 * outputs: none
4640 */
4641 static int
4642 zfs_ioc_hold(zfs_cmd_t *zc)
4643 {
4644 boolean_t recursive = zc->zc_cookie;
4645 spa_t *spa;
4646 dsl_pool_t *dp;
4647 dsl_dataset_t *ds;
4648 int error;
4649 minor_t minor = 0;
4650
4651 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
4652 return (EINVAL);
4653
4654 if (zc->zc_sendobj == 0) {
4655 return (dsl_dataset_user_hold(zc->zc_name, zc->zc_value,
4656 zc->zc_string, recursive, zc->zc_temphold,
4657 zc->zc_cleanup_fd));
4658 }
4659
4660 if (recursive)
4661 return (EINVAL);
4662
4663 error = spa_open(zc->zc_name, &spa, FTAG);
4664 if (error)
4665 return (error);
4666
4667 dp = spa_get_dsl(spa);
4668 rw_enter(&dp->dp_config_rwlock, RW_READER);
4669 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
4670 rw_exit(&dp->dp_config_rwlock);
4671 spa_close(spa, FTAG);
4672 if (error)
4673 return (error);
4674
4675 /*
4676 * Until we have a hold on this snapshot, it's possible that
4677 * zc_sendobj could've been destroyed and reused as part
4678 * of a later txg. Make sure we're looking at the right object.
4679 */
4680 if (zc->zc_createtxg != ds->ds_phys->ds_creation_txg) {
4681 dsl_dataset_rele(ds, FTAG);
4682 return (ENOENT);
4683 }
4684
4685 if (zc->zc_cleanup_fd != -1 && zc->zc_temphold) {
4686 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
4687 if (error) {
4688 dsl_dataset_rele(ds, FTAG);
4689 return (error);
4690 }
4691 }
4692
4693 error = dsl_dataset_user_hold_for_send(ds, zc->zc_string,
4694 zc->zc_temphold);
4695 if (minor != 0) {
4696 if (error == 0) {
4697 dsl_register_onexit_hold_cleanup(ds, zc->zc_string,
4698 minor);
4699 }
4700 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
4701 }
4702 dsl_dataset_rele(ds, FTAG);
4703
4704 return (error);
4705 }
4706
4707 /*
4708 * inputs:
4709 * zc_name name of dataset from which we're releasing a user hold
4710 * zc_value short name of snap
4711 * zc_string user-supplied tag for this hold
4712 * zc_cookie recursive flag
4713 *
4714 * outputs: none
4715 */
4716 static int
4717 zfs_ioc_release(zfs_cmd_t *zc)
4718 {
4719 boolean_t recursive = zc->zc_cookie;
4720
4721 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
4722 return (EINVAL);
4723
4724 return (dsl_dataset_user_release(zc->zc_name, zc->zc_value,
4725 zc->zc_string, recursive));
4726 }
4727
4728 /*
4729 * inputs:
4730 * zc_name name of filesystem
4731 *
4732 * outputs:
4733 * zc_nvlist_src{_size} nvlist of snapshot holds
4734 */
4735 static int
4736 zfs_ioc_get_holds(zfs_cmd_t *zc)
4737 {
4738 nvlist_t *nvp;
4739 int error;
4740
4741 if ((error = dsl_dataset_get_holds(zc->zc_name, &nvp)) == 0) {
4742 error = put_nvlist(zc, nvp);
4743 nvlist_free(nvp);
4744 }
4745
4746 return (error);
4747 }
4748
4749 /*
4750 * inputs:
4751 * zc_name name of new filesystem or snapshot
4752 * zc_value full name of old snapshot
4753 *
4754 * outputs:
4755 * zc_cookie space in bytes
4756 * zc_objset_type compressed space in bytes
4757 * zc_perm_action uncompressed space in bytes
4758 */
4759 static int
4760 zfs_ioc_space_written(zfs_cmd_t *zc)
4761 {
4762 int error;
4763 dsl_dataset_t *new, *old;
4764
4765 error = dsl_dataset_hold(zc->zc_name, FTAG, &new);
4766 if (error != 0)
4767 return (error);
4768 error = dsl_dataset_hold(zc->zc_value, FTAG, &old);
4769 if (error != 0) {
4770 dsl_dataset_rele(new, FTAG);
4771 return (error);
4772 }
4773
4774 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
4775 &zc->zc_objset_type, &zc->zc_perm_action);
4776 dsl_dataset_rele(old, FTAG);
4777 dsl_dataset_rele(new, FTAG);
4778 return (error);
4779 }
4780
4781 /*
4782 * inputs:
4783 * zc_name full name of last snapshot
4784 * zc_value full name of first snapshot
4785 *
4786 * outputs:
4787 * zc_cookie space in bytes
4788 * zc_objset_type compressed space in bytes
4789 * zc_perm_action uncompressed space in bytes
4790 */
4791 static int
4792 zfs_ioc_space_snaps(zfs_cmd_t *zc)
4793 {
4794 int error;
4795 dsl_dataset_t *new, *old;
4796
4797 error = dsl_dataset_hold(zc->zc_name, FTAG, &new);
4798 if (error != 0)
4799 return (error);
4800 error = dsl_dataset_hold(zc->zc_value, FTAG, &old);
4801 if (error != 0) {
4802 dsl_dataset_rele(new, FTAG);
4803 return (error);
4804 }
4805
4806 error = dsl_dataset_space_wouldfree(old, new, &zc->zc_cookie,
4807 &zc->zc_objset_type, &zc->zc_perm_action);
4808 dsl_dataset_rele(old, FTAG);
4809 dsl_dataset_rele(new, FTAG);
4810 return (error);
4811 }
4812
4813 /*
4814 * pool create, destroy, and export don't log the history as part of
4815 * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export
4816 * do the logging of those commands.
4817 */
4818 static zfs_ioc_vec_t zfs_ioc_vec[] = {
4819 { zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE,
4820 POOL_CHECK_NONE },
4821 { zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE,
4822 POOL_CHECK_NONE },
4823 { zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4824 POOL_CHECK_NONE },
4825 { zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE,
4826 POOL_CHECK_NONE },
4827 { zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE,
4828 POOL_CHECK_NONE },
4829 { zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE,
4830 POOL_CHECK_NONE },
4831 { zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE,
4832 POOL_CHECK_NONE },
4833 { zfs_ioc_pool_scan, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4834 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4835 { zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE,
4836 POOL_CHECK_READONLY },
4837 { zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4838 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4839 { zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE,
4840 POOL_CHECK_NONE },
4841 { zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4842 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4843 { zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4844 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4845 { zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4846 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4847 { zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4848 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4849 { zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4850 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4851 { zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE,
4852 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4853 { zfs_ioc_vdev_setfru, zfs_secpolicy_config, POOL_NAME, B_FALSE,
4854 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4855 { zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4856 POOL_CHECK_SUSPENDED },
4857 { zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4858 POOL_CHECK_NONE },
4859 { zfs_ioc_dataset_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4860 POOL_CHECK_SUSPENDED },
4861 { zfs_ioc_snapshot_list_next, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4862 POOL_CHECK_SUSPENDED },
4863 { zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE,
4864 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4865 { zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE,
4866 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4867 { zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE,
4868 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4869 { zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE,
4870 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4871 { zfs_ioc_rename, zfs_secpolicy_rename, DATASET_NAME, B_TRUE,
4872 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4873 { zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE,
4874 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4875 { zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_FALSE,
4876 POOL_CHECK_NONE },
4877 { zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE,
4878 POOL_CHECK_NONE },
4879 { zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE,
4880 POOL_CHECK_NONE },
4881 { zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE,
4882 POOL_CHECK_NONE },
4883 { zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE,
4884 POOL_CHECK_NONE },
4885 { zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4886 POOL_CHECK_NONE },
4887 { zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE,
4888 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4889 { zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE,
4890 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4891 { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_diff, POOL_NAME, B_FALSE,
4892 POOL_CHECK_NONE },
4893 { zfs_ioc_obj_to_path, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
4894 POOL_CHECK_SUSPENDED },
4895 { zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4896 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4897 { zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE,
4898 POOL_CHECK_NONE },
4899 { zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE,
4900 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4901 { zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4902 POOL_CHECK_NONE },
4903 { zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE,
4904 POOL_CHECK_NONE },
4905 { zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE,
4906 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4907 { zfs_ioc_smb_acl, zfs_secpolicy_smb_acl, DATASET_NAME, B_FALSE,
4908 POOL_CHECK_NONE },
4909 { zfs_ioc_userspace_one, zfs_secpolicy_userspace_one, DATASET_NAME,
4910 B_FALSE, POOL_CHECK_NONE },
4911 { zfs_ioc_userspace_many, zfs_secpolicy_userspace_many, DATASET_NAME,
4912 B_FALSE, POOL_CHECK_NONE },
4913 { zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
4914 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4915 { zfs_ioc_hold, zfs_secpolicy_hold, DATASET_NAME, B_TRUE,
4916 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4917 { zfs_ioc_release, zfs_secpolicy_release, DATASET_NAME, B_TRUE,
4918 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4919 { zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4920 POOL_CHECK_SUSPENDED },
4921 { zfs_ioc_objset_recvd_props, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4922 POOL_CHECK_NONE },
4923 { zfs_ioc_vdev_split, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4924 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4925 { zfs_ioc_next_obj, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4926 POOL_CHECK_NONE },
4927 { zfs_ioc_diff, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
4928 POOL_CHECK_NONE },
4929 { zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot, DATASET_NAME,
4930 B_FALSE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4931 { zfs_ioc_obj_to_stats, zfs_secpolicy_diff, DATASET_NAME, B_FALSE,
4932 POOL_CHECK_SUSPENDED },
4933 { zfs_ioc_space_written, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4934 POOL_CHECK_SUSPENDED },
4935 { zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4936 POOL_CHECK_SUSPENDED },
4937 { zfs_ioc_destroy_snaps_nvl, zfs_secpolicy_destroy_recursive,
4938 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4939 { zfs_ioc_pool_reguid, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4940 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY },
4941 { zfs_ioc_pool_reopen, zfs_secpolicy_config, POOL_NAME, B_TRUE,
4942 POOL_CHECK_SUSPENDED },
4943 { zfs_ioc_send_progress, zfs_secpolicy_read, DATASET_NAME, B_FALSE,
4944 POOL_CHECK_NONE }
4945 };
4946
4947 int
4948 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
4949 zfs_ioc_poolcheck_t check)
4950 {
4951 spa_t *spa;
4952 int error;
4953
4954 ASSERT(type == POOL_NAME || type == DATASET_NAME);
4955
4956 if (check & POOL_CHECK_NONE)
4957 return (0);
4958
4959 error = spa_open(name, &spa, FTAG);
4960 if (error == 0) {
4961 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
4962 error = EAGAIN;
4963 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
4964 error = EROFS;
4965 spa_close(spa, FTAG);
4966 }
4967 return (error);
4968 }
4969
4970 /*
4971 * Find a free minor number.
4972 */
4973 minor_t
4974 zfsdev_minor_alloc(void)
4975 {
4976 static minor_t last_minor;
4977 minor_t m;
4978
4979 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
4980
4981 for (m = last_minor + 1; m != last_minor; m++) {
4982 if (m > ZFSDEV_MAX_MINOR)
4983 m = 1;
4984 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
4985 last_minor = m;
4986 return (m);
4987 }
4988 }
4989
4990 return (0);
4991 }
4992
4993 static int
4994 zfs_ctldev_init(dev_t *devp)
4995 {
4996 minor_t minor;
4997 zfs_soft_state_t *zs;
4998
4999 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5000 ASSERT(getminor(*devp) == 0);
5001
5002 minor = zfsdev_minor_alloc();
5003 if (minor == 0)
5004 return (ENXIO);
5005
5006 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5007 return (EAGAIN);
5008
5009 *devp = makedevice(getemajor(*devp), minor);
5010
5011 zs = ddi_get_soft_state(zfsdev_state, minor);
5012 zs->zss_type = ZSST_CTLDEV;
5013 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5014
5015 return (0);
5016 }
5017
5018 static void
5019 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5020 {
5021 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5022
5023 zfs_onexit_destroy(zo);
5024 ddi_soft_state_free(zfsdev_state, minor);
5025 }
5026
5027 void *
5028 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5029 {
5030 zfs_soft_state_t *zp;
5031
5032 zp = ddi_get_soft_state(zfsdev_state, minor);
5033 if (zp == NULL || zp->zss_type != which)
5034 return (NULL);
5035
5036 return (zp->zss_data);
5037 }
5038
5039 static int
5040 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5041 {
5042 int error = 0;
5043
5044 if (getminor(*devp) != 0)
5045 return (zvol_open(devp, flag, otyp, cr));
5046
5047 /* This is the control device. Allocate a new minor if requested. */
5048 if (flag & FEXCL) {
5049 mutex_enter(&zfsdev_state_lock);
5050 error = zfs_ctldev_init(devp);
5051 mutex_exit(&zfsdev_state_lock);
5052 }
5053
5054 return (error);
5055 }
5056
5057 static int
5058 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5059 {
5060 zfs_onexit_t *zo;
5061 minor_t minor = getminor(dev);
5062
5063 if (minor == 0)
5064 return (0);
5065
5066 mutex_enter(&zfsdev_state_lock);
5067 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5068 if (zo == NULL) {
5069 mutex_exit(&zfsdev_state_lock);
5070 return (zvol_close(dev, flag, otyp, cr));
5071 }
5072 zfs_ctldev_destroy(zo, minor);
5073 mutex_exit(&zfsdev_state_lock);
5074
5075 return (0);
5076 }
5077
5078 static int
5079 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5080 {
5081 zfs_cmd_t *zc;
5082 uint_t vec;
5083 int error, rc;
5084 minor_t minor = getminor(dev);
5085
5086 if (minor != 0 &&
5087 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5088 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5089
5090 vec = cmd - ZFS_IOC;
5091 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5092
5093 if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5094 return (EINVAL);
5095
5096 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5097
5098 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5099 if (error != 0)
5100 error = EFAULT;
5101
5102 if ((error == 0) && !(flag & FKIOCTL))
5103 error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr);
5104
5105 /*
5106 * Ensure that all pool/dataset names are valid before we pass down to
5107 * the lower layers.
5108 */
5109 if (error == 0) {
5110 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5111 zc->zc_iflags = flag & FKIOCTL;
5112 switch (zfs_ioc_vec[vec].zvec_namecheck) {
5113 case POOL_NAME:
5114 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5115 error = EINVAL;
5116 error = pool_status_check(zc->zc_name,
5117 zfs_ioc_vec[vec].zvec_namecheck,
5118 zfs_ioc_vec[vec].zvec_pool_check);
5119 break;
5120
5121 case DATASET_NAME:
5122 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5123 error = EINVAL;
5124 error = pool_status_check(zc->zc_name,
5125 zfs_ioc_vec[vec].zvec_namecheck,
5126 zfs_ioc_vec[vec].zvec_pool_check);
5127 break;
5128
5129 case NO_NAME:
5130 break;
5131 }
5132 }
5133
5134 if (error == 0)
5135 error = zfs_ioc_vec[vec].zvec_func(zc);
5136
5137 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5138 if (error == 0) {
5139 if (rc != 0)
5140 error = EFAULT;
5141 if (zfs_ioc_vec[vec].zvec_his_log)
5142 zfs_log_history(zc);
5143 }
5144
5145 kmem_free(zc, sizeof (zfs_cmd_t));
5146 return (error);
5147 }
5148
5149 static int
5150 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5151 {
5152 if (cmd != DDI_ATTACH)
5153 return (DDI_FAILURE);
5154
5155 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5156 DDI_PSEUDO, 0) == DDI_FAILURE)
5157 return (DDI_FAILURE);
5158
5159 zfs_dip = dip;
5160
5161 ddi_report_dev(dip);
5162
5163 return (DDI_SUCCESS);
5164 }
5165
5166 static int
5167 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5168 {
5169 if (spa_busy() || zfs_busy() || zvol_busy())
5170 return (DDI_FAILURE);
5171
5172 if (cmd != DDI_DETACH)
5173 return (DDI_FAILURE);
5174
5175 zfs_dip = NULL;
5176
5177 ddi_prop_remove_all(dip);
5178 ddi_remove_minor_node(dip, NULL);
5179
5180 return (DDI_SUCCESS);
5181 }
5182
5183 /*ARGSUSED*/
5184 static int
5185 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5186 {
5187 switch (infocmd) {
5188 case DDI_INFO_DEVT2DEVINFO:
5189 *result = zfs_dip;
5190 return (DDI_SUCCESS);
5191
5192 case DDI_INFO_DEVT2INSTANCE:
5193 *result = (void *)0;
5194 return (DDI_SUCCESS);
5195 }
5196
5197 return (DDI_FAILURE);
5198 }
5199
5200 /*
5201 * OK, so this is a little weird.
5202 *
5203 * /dev/zfs is the control node, i.e. minor 0.
5204 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5205 *
5206 * /dev/zfs has basically nothing to do except serve up ioctls,
5207 * so most of the standard driver entry points are in zvol.c.
5208 */
5209 static struct cb_ops zfs_cb_ops = {
5210 zfsdev_open, /* open */
5211 zfsdev_close, /* close */
5212 zvol_strategy, /* strategy */
5213 nodev, /* print */
5214 zvol_dump, /* dump */
5215 zvol_read, /* read */
5216 zvol_write, /* write */
5217 zfsdev_ioctl, /* ioctl */
5218 nodev, /* devmap */
5219 nodev, /* mmap */
5220 nodev, /* segmap */
5221 nochpoll, /* poll */
5222 ddi_prop_op, /* prop_op */
5223 NULL, /* streamtab */
5224 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
5225 CB_REV, /* version */
5226 nodev, /* async read */
5227 nodev, /* async write */
5228 };
5229
5230 static struct dev_ops zfs_dev_ops = {
5231 DEVO_REV, /* version */
5232 0, /* refcnt */
5233 zfs_info, /* info */
5234 nulldev, /* identify */
5235 nulldev, /* probe */
5236 zfs_attach, /* attach */
5237 zfs_detach, /* detach */
5238 nodev, /* reset */
5239 &zfs_cb_ops, /* driver operations */
5240 NULL, /* no bus operations */
5241 NULL, /* power */
5242 ddi_quiesce_not_needed, /* quiesce */
5243 };
5244
5245 static struct modldrv zfs_modldrv = {
5246 &mod_driverops,
5247 "ZFS storage pool",
5248 &zfs_dev_ops
5249 };
5250
5251 static struct modlinkage modlinkage = {
5252 MODREV_1,
5253 (void *)&zfs_modlfs,
5254 (void *)&zfs_modldrv,
5255 NULL
5256 };
5257
5258
5259 uint_t zfs_fsyncer_key;
5260 extern uint_t rrw_tsd_key;
5261
5262 int
5263 _init(void)
5264 {
5265 int error;
5266
5267 spa_init(FREAD | FWRITE);
5268 zfs_init();
5269 zvol_init();
5270
5271 if ((error = mod_install(&modlinkage)) != 0) {
5272 zvol_fini();
5273 zfs_fini();
5274 spa_fini();
5275 return (error);
5276 }
5277
5278 tsd_create(&zfs_fsyncer_key, NULL);
5279 tsd_create(&rrw_tsd_key, NULL);
5280
5281 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
5282 ASSERT(error == 0);
5283 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
5284
5285 return (0);
5286 }
5287
5288 int
5289 _fini(void)
5290 {
5291 int error;
5292
5293 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
5294 return (EBUSY);
5295
5296 if ((error = mod_remove(&modlinkage)) != 0)
5297 return (error);
5298
5299 zvol_fini();
5300 zfs_fini();
5301 spa_fini();
5302 if (zfs_nfsshare_inited)
5303 (void) ddi_modclose(nfs_mod);
5304 if (zfs_smbshare_inited)
5305 (void) ddi_modclose(smbsrv_mod);
5306 if (zfs_nfsshare_inited || zfs_smbshare_inited)
5307 (void) ddi_modclose(sharefs_mod);
5308
5309 tsd_destroy(&zfs_fsyncer_key);
5310 ldi_ident_release(zfs_li);
5311 zfs_li = NULL;
5312 mutex_destroy(&zfs_share_lock);
5313
5314 return (error);
5315 }
5316
5317 int
5318 _info(struct modinfo *modinfop)
5319 {
5320 return (mod_info(&modlinkage, modinfop));
5321 }