1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Portions Copyright 2011 Martin Matuska
25 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
27 * Copyright (c) 2013 by Delphix. All rights reserved.
28 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
29 */
30
31 /*
32 * ZFS ioctls.
33 *
34 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
35 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
36 *
37 * There are two ways that we handle ioctls: the legacy way where almost
38 * all of the logic is in the ioctl callback, and the new way where most
39 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
40 *
41 * Non-legacy ioctls should be registered by calling
42 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
43 * from userland by lzc_ioctl().
44 *
45 * The registration arguments are as follows:
46 *
47 * const char *name
48 * The name of the ioctl. This is used for history logging. If the
49 * ioctl returns successfully (the callback returns 0), and allow_log
50 * is true, then a history log entry will be recorded with the input &
51 * output nvlists. The log entry can be printed with "zpool history -i".
52 *
53 * zfs_ioc_t ioc
54 * The ioctl request number, which userland will pass to ioctl(2).
55 * The ioctl numbers can change from release to release, because
56 * the caller (libzfs) must be matched to the kernel.
57 *
58 * zfs_secpolicy_func_t *secpolicy
59 * This function will be called before the zfs_ioc_func_t, to
60 * determine if this operation is permitted. It should return EPERM
61 * on failure, and 0 on success. Checks include determining if the
62 * dataset is visible in this zone, and if the user has either all
63 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
64 * to do this operation on this dataset with "zfs allow".
65 *
66 * zfs_ioc_namecheck_t namecheck
67 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
68 * name, a dataset name, or nothing. If the name is not well-formed,
69 * the ioctl will fail and the callback will not be called.
70 * Therefore, the callback can assume that the name is well-formed
71 * (e.g. is null-terminated, doesn't have more than one '@' character,
72 * doesn't have invalid characters).
73 *
74 * zfs_ioc_poolcheck_t pool_check
75 * This specifies requirements on the pool state. If the pool does
76 * not meet them (is suspended or is readonly), the ioctl will fail
77 * and the callback will not be called. If any checks are specified
78 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
79 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
80 * POOL_CHECK_READONLY).
81 *
82 * boolean_t smush_outnvlist
83 * If smush_outnvlist is true, then the output is presumed to be a
84 * list of errors, and it will be "smushed" down to fit into the
85 * caller's buffer, by removing some entries and replacing them with a
86 * single "N_MORE_ERRORS" entry indicating how many were removed. See
87 * nvlist_smush() for details. If smush_outnvlist is false, and the
88 * outnvlist does not fit into the userland-provided buffer, then the
89 * ioctl will fail with ENOMEM.
90 *
91 * zfs_ioc_func_t *func
92 * The callback function that will perform the operation.
93 *
94 * The callback should return 0 on success, or an error number on
95 * failure. If the function fails, the userland ioctl will return -1,
96 * and errno will be set to the callback's return value. The callback
97 * will be called with the following arguments:
98 *
99 * const char *name
100 * The name of the pool or dataset to operate on, from
101 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
102 * expected type (pool, dataset, or none).
103 *
104 * nvlist_t *innvl
105 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
106 * NULL if no input nvlist was provided. Changes to this nvlist are
107 * ignored. If the input nvlist could not be deserialized, the
108 * ioctl will fail and the callback will not be called.
109 *
110 * nvlist_t *outnvl
111 * The output nvlist, initially empty. The callback can fill it in,
112 * and it will be returned to userland by serializing it into
113 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
114 * fails (e.g. because the caller didn't supply a large enough
115 * buffer), then the overall ioctl will fail. See the
116 * 'smush_nvlist' argument above for additional behaviors.
117 *
118 * There are two typical uses of the output nvlist:
119 * - To return state, e.g. property values. In this case,
120 * smush_outnvlist should be false. If the buffer was not large
121 * enough, the caller will reallocate a larger buffer and try
122 * the ioctl again.
123 *
124 * - To return multiple errors from an ioctl which makes on-disk
125 * changes. In this case, smush_outnvlist should be true.
126 * Ioctls which make on-disk modifications should generally not
127 * use the outnvl if they succeed, because the caller can not
128 * distinguish between the operation failing, and
129 * deserialization failing.
130 */
131
132 #include <sys/types.h>
133 #include <sys/param.h>
134 #include <sys/errno.h>
135 #include <sys/uio.h>
136 #include <sys/buf.h>
137 #include <sys/modctl.h>
138 #include <sys/open.h>
139 #include <sys/file.h>
140 #include <sys/kmem.h>
141 #include <sys/conf.h>
142 #include <sys/cmn_err.h>
143 #include <sys/stat.h>
144 #include <sys/zfs_ioctl.h>
145 #include <sys/zfs_vfsops.h>
146 #include <sys/zfs_znode.h>
147 #include <sys/zap.h>
148 #include <sys/spa.h>
149 #include <sys/spa_impl.h>
150 #include <sys/vdev.h>
151 #include <sys/priv_impl.h>
152 #include <sys/dmu.h>
153 #include <sys/dsl_dir.h>
154 #include <sys/dsl_dataset.h>
155 #include <sys/dsl_prop.h>
156 #include <sys/dsl_deleg.h>
157 #include <sys/dmu_objset.h>
158 #include <sys/dmu_impl.h>
159 #include <sys/dmu_tx.h>
160 #include <sys/ddi.h>
161 #include <sys/sunddi.h>
162 #include <sys/sunldi.h>
163 #include <sys/policy.h>
164 #include <sys/zone.h>
165 #include <sys/nvpair.h>
166 #include <sys/pathname.h>
167 #include <sys/mount.h>
168 #include <sys/sdt.h>
169 #include <sys/fs/zfs.h>
170 #include <sys/zfs_ctldir.h>
171 #include <sys/zfs_dir.h>
172 #include <sys/zfs_onexit.h>
173 #include <sys/zvol.h>
174 #include <sys/dsl_scan.h>
175 #include <sharefs/share.h>
176 #include <sys/dmu_objset.h>
177 #include <sys/dmu_send.h>
178 #include <sys/dsl_destroy.h>
179 #include <sys/dsl_userhold.h>
180 #include <sys/zfeature.h>
181
182 #include "zfs_namecheck.h"
183 #include "zfs_prop.h"
184 #include "zfs_deleg.h"
185 #include "zfs_comutil.h"
186
187 extern struct modlfs zfs_modlfs;
188
189 extern void zfs_init(void);
190 extern void zfs_fini(void);
191
192 ldi_ident_t zfs_li = NULL;
193 dev_info_t *zfs_dip;
194
195 uint_t zfs_fsyncer_key;
196 extern uint_t rrw_tsd_key;
197 static uint_t zfs_allow_log_key;
198
199 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
200 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
201 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
202
203 typedef enum {
204 NO_NAME,
205 POOL_NAME,
206 DATASET_NAME
207 } zfs_ioc_namecheck_t;
208
209 typedef enum {
210 POOL_CHECK_NONE = 1 << 0,
211 POOL_CHECK_SUSPENDED = 1 << 1,
212 POOL_CHECK_READONLY = 1 << 2,
213 } zfs_ioc_poolcheck_t;
214
215 typedef struct zfs_ioc_vec {
216 zfs_ioc_legacy_func_t *zvec_legacy_func;
217 zfs_ioc_func_t *zvec_func;
218 zfs_secpolicy_func_t *zvec_secpolicy;
219 zfs_ioc_namecheck_t zvec_namecheck;
220 boolean_t zvec_allow_log;
221 zfs_ioc_poolcheck_t zvec_pool_check;
222 boolean_t zvec_smush_outnvlist;
223 const char *zvec_name;
224 } zfs_ioc_vec_t;
225
226 /* This array is indexed by zfs_userquota_prop_t */
227 static const char *userquota_perms[] = {
228 ZFS_DELEG_PERM_USERUSED,
229 ZFS_DELEG_PERM_USERQUOTA,
230 ZFS_DELEG_PERM_GROUPUSED,
231 ZFS_DELEG_PERM_GROUPQUOTA,
232 };
233
234 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
235 static int zfs_check_settable(const char *name, nvpair_t *property,
236 cred_t *cr);
237 static int zfs_check_clearable(char *dataset, nvlist_t *props,
238 nvlist_t **errors);
239 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
240 boolean_t *);
241 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
242 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
243
244 static int zfs_prop_activate_feature(spa_t *spa, zfeature_info_t *feature);
245
246 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
247 void
248 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
249 {
250 const char *newfile;
251 char buf[512];
252 va_list adx;
253
254 /*
255 * Get rid of annoying "../common/" prefix to filename.
256 */
257 newfile = strrchr(file, '/');
258 if (newfile != NULL) {
259 newfile = newfile + 1; /* Get rid of leading / */
260 } else {
261 newfile = file;
262 }
263
264 va_start(adx, fmt);
265 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
266 va_end(adx);
267
268 /*
269 * To get this data, use the zfs-dprintf probe as so:
270 * dtrace -q -n 'zfs-dprintf \
271 * /stringof(arg0) == "dbuf.c"/ \
272 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
273 * arg0 = file name
274 * arg1 = function name
275 * arg2 = line number
276 * arg3 = message
277 */
278 DTRACE_PROBE4(zfs__dprintf,
279 char *, newfile, char *, func, int, line, char *, buf);
280 }
281
282 static void
283 history_str_free(char *buf)
284 {
285 kmem_free(buf, HIS_MAX_RECORD_LEN);
286 }
287
288 static char *
289 history_str_get(zfs_cmd_t *zc)
290 {
291 char *buf;
292
293 if (zc->zc_history == NULL)
294 return (NULL);
295
296 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
297 if (copyinstr((void *)(uintptr_t)zc->zc_history,
298 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
299 history_str_free(buf);
300 return (NULL);
301 }
302
303 buf[HIS_MAX_RECORD_LEN -1] = '\0';
304
305 return (buf);
306 }
307
308 /*
309 * Check to see if the named dataset is currently defined as bootable
310 */
311 static boolean_t
312 zfs_is_bootfs(const char *name)
313 {
314 objset_t *os;
315
316 if (dmu_objset_hold(name, FTAG, &os) == 0) {
317 boolean_t ret;
318 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
319 dmu_objset_rele(os, FTAG);
320 return (ret);
321 }
322 return (B_FALSE);
323 }
324
325 /*
326 * zfs_earlier_version
327 *
328 * Return non-zero if the spa version is less than requested version.
329 */
330 static int
331 zfs_earlier_version(const char *name, int version)
332 {
333 spa_t *spa;
334
335 if (spa_open(name, &spa, FTAG) == 0) {
336 if (spa_version(spa) < version) {
337 spa_close(spa, FTAG);
338 return (1);
339 }
340 spa_close(spa, FTAG);
341 }
342 return (0);
343 }
344
345 /*
346 * zpl_earlier_version
347 *
348 * Return TRUE if the ZPL version is less than requested version.
349 */
350 static boolean_t
351 zpl_earlier_version(const char *name, int version)
352 {
353 objset_t *os;
354 boolean_t rc = B_TRUE;
355
356 if (dmu_objset_hold(name, FTAG, &os) == 0) {
357 uint64_t zplversion;
358
359 if (dmu_objset_type(os) != DMU_OST_ZFS) {
360 dmu_objset_rele(os, FTAG);
361 return (B_TRUE);
362 }
363 /* XXX reading from non-owned objset */
364 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
365 rc = zplversion < version;
366 dmu_objset_rele(os, FTAG);
367 }
368 return (rc);
369 }
370
371 static void
372 zfs_log_history(zfs_cmd_t *zc)
373 {
374 spa_t *spa;
375 char *buf;
376
377 if ((buf = history_str_get(zc)) == NULL)
378 return;
379
380 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
381 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
382 (void) spa_history_log(spa, buf);
383 spa_close(spa, FTAG);
384 }
385 history_str_free(buf);
386 }
387
388 /*
389 * Policy for top-level read operations (list pools). Requires no privileges,
390 * and can be used in the local zone, as there is no associated dataset.
391 */
392 /* ARGSUSED */
393 static int
394 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
395 {
396 return (0);
397 }
398
399 /*
400 * Policy for dataset read operations (list children, get statistics). Requires
401 * no privileges, but must be visible in the local zone.
402 */
403 /* ARGSUSED */
404 static int
405 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
406 {
407 if (INGLOBALZONE(curproc) ||
408 zone_dataset_visible(zc->zc_name, NULL))
409 return (0);
410
411 return (SET_ERROR(ENOENT));
412 }
413
414 static int
415 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
416 {
417 int writable = 1;
418
419 /*
420 * The dataset must be visible by this zone -- check this first
421 * so they don't see EPERM on something they shouldn't know about.
422 */
423 if (!INGLOBALZONE(curproc) &&
424 !zone_dataset_visible(dataset, &writable))
425 return (SET_ERROR(ENOENT));
426
427 if (INGLOBALZONE(curproc)) {
428 /*
429 * If the fs is zoned, only root can access it from the
430 * global zone.
431 */
432 if (secpolicy_zfs(cr) && zoned)
433 return (SET_ERROR(EPERM));
434 } else {
435 /*
436 * If we are in a local zone, the 'zoned' property must be set.
437 */
438 if (!zoned)
439 return (SET_ERROR(EPERM));
440
441 /* must be writable by this zone */
442 if (!writable)
443 return (SET_ERROR(EPERM));
444 }
445 return (0);
446 }
447
448 static int
449 zfs_dozonecheck(const char *dataset, cred_t *cr)
450 {
451 uint64_t zoned;
452
453 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
454 return (SET_ERROR(ENOENT));
455
456 return (zfs_dozonecheck_impl(dataset, zoned, cr));
457 }
458
459 static int
460 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
461 {
462 uint64_t zoned;
463
464 if (dsl_prop_get_int_ds(ds, "zoned", &zoned))
465 return (SET_ERROR(ENOENT));
466
467 return (zfs_dozonecheck_impl(dataset, zoned, cr));
468 }
469
470 static int
471 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
472 const char *perm, cred_t *cr)
473 {
474 int error;
475
476 error = zfs_dozonecheck_ds(name, ds, cr);
477 if (error == 0) {
478 error = secpolicy_zfs(cr);
479 if (error != 0)
480 error = dsl_deleg_access_impl(ds, perm, cr);
481 }
482 return (error);
483 }
484
485 static int
486 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
487 {
488 int error;
489 dsl_dataset_t *ds;
490 dsl_pool_t *dp;
491
492 error = dsl_pool_hold(name, FTAG, &dp);
493 if (error != 0)
494 return (error);
495
496 error = dsl_dataset_hold(dp, name, FTAG, &ds);
497 if (error != 0) {
498 dsl_pool_rele(dp, FTAG);
499 return (error);
500 }
501
502 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr);
503
504 dsl_dataset_rele(ds, FTAG);
505 dsl_pool_rele(dp, FTAG);
506 return (error);
507 }
508
509 /*
510 * Policy for setting the security label property.
511 *
512 * Returns 0 for success, non-zero for access and other errors.
513 */
514 static int
515 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
516 {
517 char ds_hexsl[MAXNAMELEN];
518 bslabel_t ds_sl, new_sl;
519 boolean_t new_default = FALSE;
520 uint64_t zoned;
521 int needed_priv = -1;
522 int error;
523
524 /* First get the existing dataset label. */
525 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
526 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
527 if (error != 0)
528 return (SET_ERROR(EPERM));
529
530 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
531 new_default = TRUE;
532
533 /* The label must be translatable */
534 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
535 return (SET_ERROR(EINVAL));
536
537 /*
538 * In a non-global zone, disallow attempts to set a label that
539 * doesn't match that of the zone; otherwise no other checks
540 * are needed.
541 */
542 if (!INGLOBALZONE(curproc)) {
543 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
544 return (SET_ERROR(EPERM));
545 return (0);
546 }
547
548 /*
549 * For global-zone datasets (i.e., those whose zoned property is
550 * "off", verify that the specified new label is valid for the
551 * global zone.
552 */
553 if (dsl_prop_get_integer(name,
554 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
555 return (SET_ERROR(EPERM));
556 if (!zoned) {
557 if (zfs_check_global_label(name, strval) != 0)
558 return (SET_ERROR(EPERM));
559 }
560
561 /*
562 * If the existing dataset label is nondefault, check if the
563 * dataset is mounted (label cannot be changed while mounted).
564 * Get the zfsvfs; if there isn't one, then the dataset isn't
565 * mounted (or isn't a dataset, doesn't exist, ...).
566 */
567 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
568 objset_t *os;
569 static char *setsl_tag = "setsl_tag";
570
571 /*
572 * Try to own the dataset; abort if there is any error,
573 * (e.g., already mounted, in use, or other error).
574 */
575 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
576 setsl_tag, &os);
577 if (error != 0)
578 return (SET_ERROR(EPERM));
579
580 dmu_objset_disown(os, setsl_tag);
581
582 if (new_default) {
583 needed_priv = PRIV_FILE_DOWNGRADE_SL;
584 goto out_check;
585 }
586
587 if (hexstr_to_label(strval, &new_sl) != 0)
588 return (SET_ERROR(EPERM));
589
590 if (blstrictdom(&ds_sl, &new_sl))
591 needed_priv = PRIV_FILE_DOWNGRADE_SL;
592 else if (blstrictdom(&new_sl, &ds_sl))
593 needed_priv = PRIV_FILE_UPGRADE_SL;
594 } else {
595 /* dataset currently has a default label */
596 if (!new_default)
597 needed_priv = PRIV_FILE_UPGRADE_SL;
598 }
599
600 out_check:
601 if (needed_priv != -1)
602 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
603 return (0);
604 }
605
606 static int
607 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
608 cred_t *cr)
609 {
610 char *strval;
611
612 /*
613 * Check permissions for special properties.
614 */
615 switch (prop) {
616 case ZFS_PROP_ZONED:
617 /*
618 * Disallow setting of 'zoned' from within a local zone.
619 */
620 if (!INGLOBALZONE(curproc))
621 return (SET_ERROR(EPERM));
622 break;
623
624 case ZFS_PROP_QUOTA:
625 if (!INGLOBALZONE(curproc)) {
626 uint64_t zoned;
627 char setpoint[MAXNAMELEN];
628 /*
629 * Unprivileged users are allowed to modify the
630 * quota on things *under* (ie. contained by)
631 * the thing they own.
632 */
633 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
634 setpoint))
635 return (SET_ERROR(EPERM));
636 if (!zoned || strlen(dsname) <= strlen(setpoint))
637 return (SET_ERROR(EPERM));
638 }
639 break;
640
641 case ZFS_PROP_MLSLABEL:
642 if (!is_system_labeled())
643 return (SET_ERROR(EPERM));
644
645 if (nvpair_value_string(propval, &strval) == 0) {
646 int err;
647
648 err = zfs_set_slabel_policy(dsname, strval, CRED());
649 if (err != 0)
650 return (err);
651 }
652 break;
653 }
654
655 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
656 }
657
658 /* ARGSUSED */
659 static int
660 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
661 {
662 int error;
663
664 error = zfs_dozonecheck(zc->zc_name, cr);
665 if (error != 0)
666 return (error);
667
668 /*
669 * permission to set permissions will be evaluated later in
670 * dsl_deleg_can_allow()
671 */
672 return (0);
673 }
674
675 /* ARGSUSED */
676 static int
677 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
678 {
679 return (zfs_secpolicy_write_perms(zc->zc_name,
680 ZFS_DELEG_PERM_ROLLBACK, cr));
681 }
682
683 /* ARGSUSED */
684 static int
685 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
686 {
687 dsl_pool_t *dp;
688 dsl_dataset_t *ds;
689 char *cp;
690 int error;
691
692 /*
693 * Generate the current snapshot name from the given objsetid, then
694 * use that name for the secpolicy/zone checks.
695 */
696 cp = strchr(zc->zc_name, '@');
697 if (cp == NULL)
698 return (SET_ERROR(EINVAL));
699 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
700 if (error != 0)
701 return (error);
702
703 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
704 if (error != 0) {
705 dsl_pool_rele(dp, FTAG);
706 return (error);
707 }
708
709 dsl_dataset_name(ds, zc->zc_name);
710
711 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
712 ZFS_DELEG_PERM_SEND, cr);
713 dsl_dataset_rele(ds, FTAG);
714 dsl_pool_rele(dp, FTAG);
715
716 return (error);
717 }
718
719 /* ARGSUSED */
720 static int
721 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
722 {
723 return (zfs_secpolicy_write_perms(zc->zc_name,
724 ZFS_DELEG_PERM_SEND, cr));
725 }
726
727 /* ARGSUSED */
728 static int
729 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
730 {
731 vnode_t *vp;
732 int error;
733
734 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
735 NO_FOLLOW, NULL, &vp)) != 0)
736 return (error);
737
738 /* Now make sure mntpnt and dataset are ZFS */
739
740 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
741 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
742 zc->zc_name) != 0)) {
743 VN_RELE(vp);
744 return (SET_ERROR(EPERM));
745 }
746
747 VN_RELE(vp);
748 return (dsl_deleg_access(zc->zc_name,
749 ZFS_DELEG_PERM_SHARE, cr));
750 }
751
752 int
753 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
754 {
755 if (!INGLOBALZONE(curproc))
756 return (SET_ERROR(EPERM));
757
758 if (secpolicy_nfs(cr) == 0) {
759 return (0);
760 } else {
761 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
762 }
763 }
764
765 int
766 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
767 {
768 if (!INGLOBALZONE(curproc))
769 return (SET_ERROR(EPERM));
770
771 if (secpolicy_smb(cr) == 0) {
772 return (0);
773 } else {
774 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
775 }
776 }
777
778 static int
779 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
780 {
781 char *cp;
782
783 /*
784 * Remove the @bla or /bla from the end of the name to get the parent.
785 */
786 (void) strncpy(parent, datasetname, parentsize);
787 cp = strrchr(parent, '@');
788 if (cp != NULL) {
789 cp[0] = '\0';
790 } else {
791 cp = strrchr(parent, '/');
792 if (cp == NULL)
793 return (SET_ERROR(ENOENT));
794 cp[0] = '\0';
795 }
796
797 return (0);
798 }
799
800 int
801 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
802 {
803 int error;
804
805 if ((error = zfs_secpolicy_write_perms(name,
806 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
807 return (error);
808
809 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
810 }
811
812 /* ARGSUSED */
813 static int
814 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
815 {
816 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
817 }
818
819 /*
820 * Destroying snapshots with delegated permissions requires
821 * descendant mount and destroy permissions.
822 */
823 /* ARGSUSED */
824 static int
825 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
826 {
827 nvlist_t *snaps;
828 nvpair_t *pair, *nextpair;
829 int error = 0;
830
831 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
832 return (SET_ERROR(EINVAL));
833 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
834 pair = nextpair) {
835 dsl_pool_t *dp;
836 dsl_dataset_t *ds;
837
838 error = dsl_pool_hold(nvpair_name(pair), FTAG, &dp);
839 if (error != 0)
840 break;
841 nextpair = nvlist_next_nvpair(snaps, pair);
842 error = dsl_dataset_hold(dp, nvpair_name(pair), FTAG, &ds);
843 if (error == 0)
844 dsl_dataset_rele(ds, FTAG);
845 dsl_pool_rele(dp, FTAG);
846
847 if (error == 0) {
848 error = zfs_secpolicy_destroy_perms(nvpair_name(pair),
849 cr);
850 } else if (error == ENOENT) {
851 /*
852 * Ignore any snapshots that don't exist (we consider
853 * them "already destroyed"). Remove the name from the
854 * nvl here in case the snapshot is created between
855 * now and when we try to destroy it (in which case
856 * we don't want to destroy it since we haven't
857 * checked for permission).
858 */
859 fnvlist_remove_nvpair(snaps, pair);
860 error = 0;
861 }
862 if (error != 0)
863 break;
864 }
865
866 return (error);
867 }
868
869 int
870 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
871 {
872 char parentname[MAXNAMELEN];
873 int error;
874
875 if ((error = zfs_secpolicy_write_perms(from,
876 ZFS_DELEG_PERM_RENAME, cr)) != 0)
877 return (error);
878
879 if ((error = zfs_secpolicy_write_perms(from,
880 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
881 return (error);
882
883 if ((error = zfs_get_parent(to, parentname,
884 sizeof (parentname))) != 0)
885 return (error);
886
887 if ((error = zfs_secpolicy_write_perms(parentname,
888 ZFS_DELEG_PERM_CREATE, cr)) != 0)
889 return (error);
890
891 if ((error = zfs_secpolicy_write_perms(parentname,
892 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
893 return (error);
894
895 return (error);
896 }
897
898 /* ARGSUSED */
899 static int
900 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
901 {
902 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
903 }
904
905 /* ARGSUSED */
906 static int
907 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
908 {
909 dsl_pool_t *dp;
910 dsl_dataset_t *clone;
911 int error;
912
913 error = zfs_secpolicy_write_perms(zc->zc_name,
914 ZFS_DELEG_PERM_PROMOTE, cr);
915 if (error != 0)
916 return (error);
917
918 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
919 if (error != 0)
920 return (error);
921
922 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
923
924 if (error == 0) {
925 char parentname[MAXNAMELEN];
926 dsl_dataset_t *origin = NULL;
927 dsl_dir_t *dd;
928 dd = clone->ds_dir;
929
930 error = dsl_dataset_hold_obj(dd->dd_pool,
931 dd->dd_phys->dd_origin_obj, FTAG, &origin);
932 if (error != 0) {
933 dsl_dataset_rele(clone, FTAG);
934 dsl_pool_rele(dp, FTAG);
935 return (error);
936 }
937
938 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
939 ZFS_DELEG_PERM_MOUNT, cr);
940
941 dsl_dataset_name(origin, parentname);
942 if (error == 0) {
943 error = zfs_secpolicy_write_perms_ds(parentname, origin,
944 ZFS_DELEG_PERM_PROMOTE, cr);
945 }
946 dsl_dataset_rele(clone, FTAG);
947 dsl_dataset_rele(origin, FTAG);
948 }
949 dsl_pool_rele(dp, FTAG);
950 return (error);
951 }
952
953 /* ARGSUSED */
954 static int
955 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
956 {
957 int error;
958
959 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
960 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
961 return (error);
962
963 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
964 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
965 return (error);
966
967 return (zfs_secpolicy_write_perms(zc->zc_name,
968 ZFS_DELEG_PERM_CREATE, cr));
969 }
970
971 int
972 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
973 {
974 return (zfs_secpolicy_write_perms(name,
975 ZFS_DELEG_PERM_SNAPSHOT, cr));
976 }
977
978 /*
979 * Check for permission to create each snapshot in the nvlist.
980 */
981 /* ARGSUSED */
982 static int
983 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
984 {
985 nvlist_t *snaps;
986 int error = 0;
987 nvpair_t *pair;
988
989 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
990 return (SET_ERROR(EINVAL));
991 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
992 pair = nvlist_next_nvpair(snaps, pair)) {
993 char *name = nvpair_name(pair);
994 char *atp = strchr(name, '@');
995
996 if (atp == NULL) {
997 error = SET_ERROR(EINVAL);
998 break;
999 }
1000 *atp = '\0';
1001 error = zfs_secpolicy_snapshot_perms(name, cr);
1002 *atp = '@';
1003 if (error != 0)
1004 break;
1005 }
1006 return (error);
1007 }
1008
1009 /* ARGSUSED */
1010 static int
1011 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1012 {
1013 /*
1014 * Even root must have a proper TSD so that we know what pool
1015 * to log to.
1016 */
1017 if (tsd_get(zfs_allow_log_key) == NULL)
1018 return (SET_ERROR(EPERM));
1019 return (0);
1020 }
1021
1022 static int
1023 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1024 {
1025 char parentname[MAXNAMELEN];
1026 int error;
1027 char *origin;
1028
1029 if ((error = zfs_get_parent(zc->zc_name, parentname,
1030 sizeof (parentname))) != 0)
1031 return (error);
1032
1033 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1034 (error = zfs_secpolicy_write_perms(origin,
1035 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1036 return (error);
1037
1038 if ((error = zfs_secpolicy_write_perms(parentname,
1039 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1040 return (error);
1041
1042 return (zfs_secpolicy_write_perms(parentname,
1043 ZFS_DELEG_PERM_MOUNT, cr));
1044 }
1045
1046 /*
1047 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1048 * SYS_CONFIG privilege, which is not available in a local zone.
1049 */
1050 /* ARGSUSED */
1051 static int
1052 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1053 {
1054 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1055 return (SET_ERROR(EPERM));
1056
1057 return (0);
1058 }
1059
1060 /*
1061 * Policy for object to name lookups.
1062 */
1063 /* ARGSUSED */
1064 static int
1065 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1066 {
1067 int error;
1068
1069 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1070 return (0);
1071
1072 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1073 return (error);
1074 }
1075
1076 /*
1077 * Policy for fault injection. Requires all privileges.
1078 */
1079 /* ARGSUSED */
1080 static int
1081 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1082 {
1083 return (secpolicy_zinject(cr));
1084 }
1085
1086 /* ARGSUSED */
1087 static int
1088 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1089 {
1090 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1091
1092 if (prop == ZPROP_INVAL) {
1093 if (!zfs_prop_user(zc->zc_value))
1094 return (SET_ERROR(EINVAL));
1095 return (zfs_secpolicy_write_perms(zc->zc_name,
1096 ZFS_DELEG_PERM_USERPROP, cr));
1097 } else {
1098 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1099 NULL, cr));
1100 }
1101 }
1102
1103 static int
1104 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1105 {
1106 int err = zfs_secpolicy_read(zc, innvl, cr);
1107 if (err)
1108 return (err);
1109
1110 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1111 return (SET_ERROR(EINVAL));
1112
1113 if (zc->zc_value[0] == 0) {
1114 /*
1115 * They are asking about a posix uid/gid. If it's
1116 * themself, allow it.
1117 */
1118 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1119 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1120 if (zc->zc_guid == crgetuid(cr))
1121 return (0);
1122 } else {
1123 if (groupmember(zc->zc_guid, cr))
1124 return (0);
1125 }
1126 }
1127
1128 return (zfs_secpolicy_write_perms(zc->zc_name,
1129 userquota_perms[zc->zc_objset_type], cr));
1130 }
1131
1132 static int
1133 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1134 {
1135 int err = zfs_secpolicy_read(zc, innvl, cr);
1136 if (err)
1137 return (err);
1138
1139 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1140 return (SET_ERROR(EINVAL));
1141
1142 return (zfs_secpolicy_write_perms(zc->zc_name,
1143 userquota_perms[zc->zc_objset_type], cr));
1144 }
1145
1146 /* ARGSUSED */
1147 static int
1148 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1149 {
1150 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1151 NULL, cr));
1152 }
1153
1154 /* ARGSUSED */
1155 static int
1156 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1157 {
1158 nvpair_t *pair;
1159 nvlist_t *holds;
1160 int error;
1161
1162 error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1163 if (error != 0)
1164 return (SET_ERROR(EINVAL));
1165
1166 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1167 pair = nvlist_next_nvpair(holds, pair)) {
1168 char fsname[MAXNAMELEN];
1169 error = dmu_fsname(nvpair_name(pair), fsname);
1170 if (error != 0)
1171 return (error);
1172 error = zfs_secpolicy_write_perms(fsname,
1173 ZFS_DELEG_PERM_HOLD, cr);
1174 if (error != 0)
1175 return (error);
1176 }
1177 return (0);
1178 }
1179
1180 /* ARGSUSED */
1181 static int
1182 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1183 {
1184 nvpair_t *pair;
1185 int error;
1186
1187 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1188 pair = nvlist_next_nvpair(innvl, pair)) {
1189 char fsname[MAXNAMELEN];
1190 error = dmu_fsname(nvpair_name(pair), fsname);
1191 if (error != 0)
1192 return (error);
1193 error = zfs_secpolicy_write_perms(fsname,
1194 ZFS_DELEG_PERM_RELEASE, cr);
1195 if (error != 0)
1196 return (error);
1197 }
1198 return (0);
1199 }
1200
1201 /*
1202 * Policy for allowing temporary snapshots to be taken or released
1203 */
1204 static int
1205 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1206 {
1207 /*
1208 * A temporary snapshot is the same as a snapshot,
1209 * hold, destroy and release all rolled into one.
1210 * Delegated diff alone is sufficient that we allow this.
1211 */
1212 int error;
1213
1214 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1215 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1216 return (0);
1217
1218 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1219 if (error == 0)
1220 error = zfs_secpolicy_hold(zc, innvl, cr);
1221 if (error == 0)
1222 error = zfs_secpolicy_release(zc, innvl, cr);
1223 if (error == 0)
1224 error = zfs_secpolicy_destroy(zc, innvl, cr);
1225 return (error);
1226 }
1227
1228 /*
1229 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1230 */
1231 static int
1232 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1233 {
1234 char *packed;
1235 int error;
1236 nvlist_t *list = NULL;
1237
1238 /*
1239 * Read in and unpack the user-supplied nvlist.
1240 */
1241 if (size == 0)
1242 return (SET_ERROR(EINVAL));
1243
1244 packed = kmem_alloc(size, KM_SLEEP);
1245
1246 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1247 iflag)) != 0) {
1248 kmem_free(packed, size);
1249 return (error);
1250 }
1251
1252 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1253 kmem_free(packed, size);
1254 return (error);
1255 }
1256
1257 kmem_free(packed, size);
1258
1259 *nvp = list;
1260 return (0);
1261 }
1262
1263 /*
1264 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1265 * Entries will be removed from the end of the nvlist, and one int32 entry
1266 * named "N_MORE_ERRORS" will be added indicating how many entries were
1267 * removed.
1268 */
1269 static int
1270 nvlist_smush(nvlist_t *errors, size_t max)
1271 {
1272 size_t size;
1273
1274 size = fnvlist_size(errors);
1275
1276 if (size > max) {
1277 nvpair_t *more_errors;
1278 int n = 0;
1279
1280 if (max < 1024)
1281 return (SET_ERROR(ENOMEM));
1282
1283 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1284 more_errors = nvlist_prev_nvpair(errors, NULL);
1285
1286 do {
1287 nvpair_t *pair = nvlist_prev_nvpair(errors,
1288 more_errors);
1289 fnvlist_remove_nvpair(errors, pair);
1290 n++;
1291 size = fnvlist_size(errors);
1292 } while (size > max);
1293
1294 fnvlist_remove_nvpair(errors, more_errors);
1295 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1296 ASSERT3U(fnvlist_size(errors), <=, max);
1297 }
1298
1299 return (0);
1300 }
1301
1302 static int
1303 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1304 {
1305 char *packed = NULL;
1306 int error = 0;
1307 size_t size;
1308
1309 size = fnvlist_size(nvl);
1310
1311 if (size > zc->zc_nvlist_dst_size) {
1312 error = SET_ERROR(ENOMEM);
1313 } else {
1314 packed = fnvlist_pack(nvl, &size);
1315 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1316 size, zc->zc_iflags) != 0)
1317 error = SET_ERROR(EFAULT);
1318 fnvlist_pack_free(packed, size);
1319 }
1320
1321 zc->zc_nvlist_dst_size = size;
1322 zc->zc_nvlist_dst_filled = B_TRUE;
1323 return (error);
1324 }
1325
1326 static int
1327 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1328 {
1329 objset_t *os;
1330 int error;
1331
1332 error = dmu_objset_hold(dsname, FTAG, &os);
1333 if (error != 0)
1334 return (error);
1335 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1336 dmu_objset_rele(os, FTAG);
1337 return (SET_ERROR(EINVAL));
1338 }
1339
1340 mutex_enter(&os->os_user_ptr_lock);
1341 *zfvp = dmu_objset_get_user(os);
1342 if (*zfvp) {
1343 VFS_HOLD((*zfvp)->z_vfs);
1344 } else {
1345 error = SET_ERROR(ESRCH);
1346 }
1347 mutex_exit(&os->os_user_ptr_lock);
1348 dmu_objset_rele(os, FTAG);
1349 return (error);
1350 }
1351
1352 /*
1353 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1354 * case its z_vfs will be NULL, and it will be opened as the owner.
1355 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1356 * which prevents all vnode ops from running.
1357 */
1358 static int
1359 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1360 {
1361 int error = 0;
1362
1363 if (getzfsvfs(name, zfvp) != 0)
1364 error = zfsvfs_create(name, zfvp);
1365 if (error == 0) {
1366 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1367 RW_READER, tag);
1368 if ((*zfvp)->z_unmounted) {
1369 /*
1370 * XXX we could probably try again, since the unmounting
1371 * thread should be just about to disassociate the
1372 * objset from the zfsvfs.
1373 */
1374 rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1375 return (SET_ERROR(EBUSY));
1376 }
1377 }
1378 return (error);
1379 }
1380
1381 static void
1382 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1383 {
1384 rrw_exit(&zfsvfs->z_teardown_lock, tag);
1385
1386 if (zfsvfs->z_vfs) {
1387 VFS_RELE(zfsvfs->z_vfs);
1388 } else {
1389 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1390 zfsvfs_free(zfsvfs);
1391 }
1392 }
1393
1394 static int
1395 zfs_ioc_pool_create(zfs_cmd_t *zc)
1396 {
1397 int error;
1398 nvlist_t *config, *props = NULL;
1399 nvlist_t *rootprops = NULL;
1400 nvlist_t *zplprops = NULL;
1401
1402 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1403 zc->zc_iflags, &config))
1404 return (error);
1405
1406 if (zc->zc_nvlist_src_size != 0 && (error =
1407 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1408 zc->zc_iflags, &props))) {
1409 nvlist_free(config);
1410 return (error);
1411 }
1412
1413 if (props) {
1414 nvlist_t *nvl = NULL;
1415 uint64_t version = SPA_VERSION;
1416
1417 (void) nvlist_lookup_uint64(props,
1418 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1419 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1420 error = SET_ERROR(EINVAL);
1421 goto pool_props_bad;
1422 }
1423 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1424 if (nvl) {
1425 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1426 if (error != 0) {
1427 nvlist_free(config);
1428 nvlist_free(props);
1429 return (error);
1430 }
1431 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1432 }
1433 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1434 error = zfs_fill_zplprops_root(version, rootprops,
1435 zplprops, NULL);
1436 if (error != 0)
1437 goto pool_props_bad;
1438 }
1439
1440 error = spa_create(zc->zc_name, config, props, zplprops);
1441
1442 /*
1443 * Set the remaining root properties
1444 */
1445 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1446 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1447 (void) spa_destroy(zc->zc_name);
1448
1449 pool_props_bad:
1450 nvlist_free(rootprops);
1451 nvlist_free(zplprops);
1452 nvlist_free(config);
1453 nvlist_free(props);
1454
1455 return (error);
1456 }
1457
1458 static int
1459 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1460 {
1461 int error;
1462 zfs_log_history(zc);
1463 error = spa_destroy(zc->zc_name);
1464 if (error == 0)
1465 zvol_remove_minors(zc->zc_name);
1466 return (error);
1467 }
1468
1469 static int
1470 zfs_ioc_pool_import(zfs_cmd_t *zc)
1471 {
1472 nvlist_t *config, *props = NULL;
1473 uint64_t guid;
1474 int error;
1475
1476 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1477 zc->zc_iflags, &config)) != 0)
1478 return (error);
1479
1480 if (zc->zc_nvlist_src_size != 0 && (error =
1481 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1482 zc->zc_iflags, &props))) {
1483 nvlist_free(config);
1484 return (error);
1485 }
1486
1487 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1488 guid != zc->zc_guid)
1489 error = SET_ERROR(EINVAL);
1490 else
1491 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1492
1493 if (zc->zc_nvlist_dst != 0) {
1494 int err;
1495
1496 if ((err = put_nvlist(zc, config)) != 0)
1497 error = err;
1498 }
1499
1500 nvlist_free(config);
1501
1502 if (props)
1503 nvlist_free(props);
1504
1505 return (error);
1506 }
1507
1508 static int
1509 zfs_ioc_pool_export(zfs_cmd_t *zc)
1510 {
1511 int error;
1512 boolean_t force = (boolean_t)zc->zc_cookie;
1513 boolean_t hardforce = (boolean_t)zc->zc_guid;
1514
1515 zfs_log_history(zc);
1516 error = spa_export(zc->zc_name, NULL, force, hardforce);
1517 if (error == 0)
1518 zvol_remove_minors(zc->zc_name);
1519 return (error);
1520 }
1521
1522 static int
1523 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1524 {
1525 nvlist_t *configs;
1526 int error;
1527
1528 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1529 return (SET_ERROR(EEXIST));
1530
1531 error = put_nvlist(zc, configs);
1532
1533 nvlist_free(configs);
1534
1535 return (error);
1536 }
1537
1538 /*
1539 * inputs:
1540 * zc_name name of the pool
1541 *
1542 * outputs:
1543 * zc_cookie real errno
1544 * zc_nvlist_dst config nvlist
1545 * zc_nvlist_dst_size size of config nvlist
1546 */
1547 static int
1548 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1549 {
1550 nvlist_t *config;
1551 int error;
1552 int ret = 0;
1553
1554 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1555 sizeof (zc->zc_value));
1556
1557 if (config != NULL) {
1558 ret = put_nvlist(zc, config);
1559 nvlist_free(config);
1560
1561 /*
1562 * The config may be present even if 'error' is non-zero.
1563 * In this case we return success, and preserve the real errno
1564 * in 'zc_cookie'.
1565 */
1566 zc->zc_cookie = error;
1567 } else {
1568 ret = error;
1569 }
1570
1571 return (ret);
1572 }
1573
1574 /*
1575 * Try to import the given pool, returning pool stats as appropriate so that
1576 * user land knows which devices are available and overall pool health.
1577 */
1578 static int
1579 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1580 {
1581 nvlist_t *tryconfig, *config;
1582 int error;
1583
1584 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1585 zc->zc_iflags, &tryconfig)) != 0)
1586 return (error);
1587
1588 config = spa_tryimport(tryconfig);
1589
1590 nvlist_free(tryconfig);
1591
1592 if (config == NULL)
1593 return (SET_ERROR(EINVAL));
1594
1595 error = put_nvlist(zc, config);
1596 nvlist_free(config);
1597
1598 return (error);
1599 }
1600
1601 /*
1602 * inputs:
1603 * zc_name name of the pool
1604 * zc_cookie scan func (pool_scan_func_t)
1605 */
1606 static int
1607 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1608 {
1609 spa_t *spa;
1610 int error;
1611
1612 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1613 return (error);
1614
1615 if (zc->zc_cookie == POOL_SCAN_NONE)
1616 error = spa_scan_stop(spa);
1617 else
1618 error = spa_scan(spa, zc->zc_cookie);
1619
1620 spa_close(spa, FTAG);
1621
1622 return (error);
1623 }
1624
1625 static int
1626 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1627 {
1628 spa_t *spa;
1629 int error;
1630
1631 error = spa_open(zc->zc_name, &spa, FTAG);
1632 if (error == 0) {
1633 spa_freeze(spa);
1634 spa_close(spa, FTAG);
1635 }
1636 return (error);
1637 }
1638
1639 static int
1640 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1641 {
1642 spa_t *spa;
1643 int error;
1644
1645 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1646 return (error);
1647
1648 if (zc->zc_cookie < spa_version(spa) ||
1649 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1650 spa_close(spa, FTAG);
1651 return (SET_ERROR(EINVAL));
1652 }
1653
1654 spa_upgrade(spa, zc->zc_cookie);
1655 spa_close(spa, FTAG);
1656
1657 return (error);
1658 }
1659
1660 static int
1661 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1662 {
1663 spa_t *spa;
1664 char *hist_buf;
1665 uint64_t size;
1666 int error;
1667
1668 if ((size = zc->zc_history_len) == 0)
1669 return (SET_ERROR(EINVAL));
1670
1671 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1672 return (error);
1673
1674 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1675 spa_close(spa, FTAG);
1676 return (SET_ERROR(ENOTSUP));
1677 }
1678
1679 hist_buf = kmem_alloc(size, KM_SLEEP);
1680 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1681 &zc->zc_history_len, hist_buf)) == 0) {
1682 error = ddi_copyout(hist_buf,
1683 (void *)(uintptr_t)zc->zc_history,
1684 zc->zc_history_len, zc->zc_iflags);
1685 }
1686
1687 spa_close(spa, FTAG);
1688 kmem_free(hist_buf, size);
1689 return (error);
1690 }
1691
1692 static int
1693 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1694 {
1695 spa_t *spa;
1696 int error;
1697
1698 error = spa_open(zc->zc_name, &spa, FTAG);
1699 if (error == 0) {
1700 error = spa_change_guid(spa);
1701 spa_close(spa, FTAG);
1702 }
1703 return (error);
1704 }
1705
1706 static int
1707 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1708 {
1709 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1710 }
1711
1712 /*
1713 * inputs:
1714 * zc_name name of filesystem
1715 * zc_obj object to find
1716 *
1717 * outputs:
1718 * zc_value name of object
1719 */
1720 static int
1721 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1722 {
1723 objset_t *os;
1724 int error;
1725
1726 /* XXX reading from objset not owned */
1727 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1728 return (error);
1729 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1730 dmu_objset_rele(os, FTAG);
1731 return (SET_ERROR(EINVAL));
1732 }
1733 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1734 sizeof (zc->zc_value));
1735 dmu_objset_rele(os, FTAG);
1736
1737 return (error);
1738 }
1739
1740 /*
1741 * inputs:
1742 * zc_name name of filesystem
1743 * zc_obj object to find
1744 *
1745 * outputs:
1746 * zc_stat stats on object
1747 * zc_value path to object
1748 */
1749 static int
1750 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1751 {
1752 objset_t *os;
1753 int error;
1754
1755 /* XXX reading from objset not owned */
1756 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1757 return (error);
1758 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1759 dmu_objset_rele(os, FTAG);
1760 return (SET_ERROR(EINVAL));
1761 }
1762 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1763 sizeof (zc->zc_value));
1764 dmu_objset_rele(os, FTAG);
1765
1766 return (error);
1767 }
1768
1769 static int
1770 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1771 {
1772 spa_t *spa;
1773 int error;
1774 nvlist_t *config, **l2cache, **spares;
1775 uint_t nl2cache = 0, nspares = 0;
1776
1777 error = spa_open(zc->zc_name, &spa, FTAG);
1778 if (error != 0)
1779 return (error);
1780
1781 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1782 zc->zc_iflags, &config);
1783 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1784 &l2cache, &nl2cache);
1785
1786 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1787 &spares, &nspares);
1788
1789 /*
1790 * A root pool with concatenated devices is not supported.
1791 * Thus, can not add a device to a root pool.
1792 *
1793 * Intent log device can not be added to a rootpool because
1794 * during mountroot, zil is replayed, a seperated log device
1795 * can not be accessed during the mountroot time.
1796 *
1797 * l2cache and spare devices are ok to be added to a rootpool.
1798 */
1799 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1800 nvlist_free(config);
1801 spa_close(spa, FTAG);
1802 return (SET_ERROR(EDOM));
1803 }
1804
1805 if (error == 0) {
1806 error = spa_vdev_add(spa, config);
1807 nvlist_free(config);
1808 }
1809 spa_close(spa, FTAG);
1810 return (error);
1811 }
1812
1813 /*
1814 * inputs:
1815 * zc_name name of the pool
1816 * zc_nvlist_conf nvlist of devices to remove
1817 * zc_cookie to stop the remove?
1818 */
1819 static int
1820 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1821 {
1822 spa_t *spa;
1823 int error;
1824
1825 error = spa_open(zc->zc_name, &spa, FTAG);
1826 if (error != 0)
1827 return (error);
1828 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1829 spa_close(spa, FTAG);
1830 return (error);
1831 }
1832
1833 static int
1834 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1835 {
1836 spa_t *spa;
1837 int error;
1838 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1839
1840 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1841 return (error);
1842 switch (zc->zc_cookie) {
1843 case VDEV_STATE_ONLINE:
1844 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1845 break;
1846
1847 case VDEV_STATE_OFFLINE:
1848 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1849 break;
1850
1851 case VDEV_STATE_FAULTED:
1852 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1853 zc->zc_obj != VDEV_AUX_EXTERNAL)
1854 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1855
1856 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1857 break;
1858
1859 case VDEV_STATE_DEGRADED:
1860 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1861 zc->zc_obj != VDEV_AUX_EXTERNAL)
1862 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1863
1864 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1865 break;
1866
1867 default:
1868 error = SET_ERROR(EINVAL);
1869 }
1870 zc->zc_cookie = newstate;
1871 spa_close(spa, FTAG);
1872 return (error);
1873 }
1874
1875 static int
1876 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1877 {
1878 spa_t *spa;
1879 int replacing = zc->zc_cookie;
1880 nvlist_t *config;
1881 int error;
1882
1883 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1884 return (error);
1885
1886 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1887 zc->zc_iflags, &config)) == 0) {
1888 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1889 nvlist_free(config);
1890 }
1891
1892 spa_close(spa, FTAG);
1893 return (error);
1894 }
1895
1896 static int
1897 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1898 {
1899 spa_t *spa;
1900 int error;
1901
1902 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1903 return (error);
1904
1905 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1906
1907 spa_close(spa, FTAG);
1908 return (error);
1909 }
1910
1911 static int
1912 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1913 {
1914 spa_t *spa;
1915 nvlist_t *config, *props = NULL;
1916 int error;
1917 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1918
1919 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1920 return (error);
1921
1922 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1923 zc->zc_iflags, &config)) {
1924 spa_close(spa, FTAG);
1925 return (error);
1926 }
1927
1928 if (zc->zc_nvlist_src_size != 0 && (error =
1929 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1930 zc->zc_iflags, &props))) {
1931 spa_close(spa, FTAG);
1932 nvlist_free(config);
1933 return (error);
1934 }
1935
1936 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1937
1938 spa_close(spa, FTAG);
1939
1940 nvlist_free(config);
1941 nvlist_free(props);
1942
1943 return (error);
1944 }
1945
1946 static int
1947 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
1948 {
1949 spa_t *spa;
1950 char *path = zc->zc_value;
1951 uint64_t guid = zc->zc_guid;
1952 int error;
1953
1954 error = spa_open(zc->zc_name, &spa, FTAG);
1955 if (error != 0)
1956 return (error);
1957
1958 error = spa_vdev_setpath(spa, guid, path);
1959 spa_close(spa, FTAG);
1960 return (error);
1961 }
1962
1963 static int
1964 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
1965 {
1966 spa_t *spa;
1967 char *fru = zc->zc_value;
1968 uint64_t guid = zc->zc_guid;
1969 int error;
1970
1971 error = spa_open(zc->zc_name, &spa, FTAG);
1972 if (error != 0)
1973 return (error);
1974
1975 error = spa_vdev_setfru(spa, guid, fru);
1976 spa_close(spa, FTAG);
1977 return (error);
1978 }
1979
1980 static int
1981 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
1982 {
1983 int error = 0;
1984 nvlist_t *nv;
1985
1986 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1987
1988 if (zc->zc_nvlist_dst != 0 &&
1989 (error = dsl_prop_get_all(os, &nv)) == 0) {
1990 dmu_objset_stats(os, nv);
1991 /*
1992 * NB: zvol_get_stats() will read the objset contents,
1993 * which we aren't supposed to do with a
1994 * DS_MODE_USER hold, because it could be
1995 * inconsistent. So this is a bit of a workaround...
1996 * XXX reading with out owning
1997 */
1998 if (!zc->zc_objset_stats.dds_inconsistent &&
1999 dmu_objset_type(os) == DMU_OST_ZVOL) {
2000 error = zvol_get_stats(os, nv);
2001 if (error == EIO)
2002 return (error);
2003 /*
2004 * If the zvol's parent dataset was being destroyed
2005 * when we called zvol_get_stats, then it's possible
2006 * that the ZAP still existed but its blocks had
2007 * been already been freed when we tried to read it.
2008 * It would then appear that the ZAP had no entries.
2009 */
2010 if (error == ENOENT)
2011 return (error);
2012 VERIFY0(error);
2013 }
2014 error = put_nvlist(zc, nv);
2015 nvlist_free(nv);
2016 }
2017
2018 return (error);
2019 }
2020
2021 /*
2022 * inputs:
2023 * zc_name name of filesystem
2024 * zc_nvlist_dst_size size of buffer for property nvlist
2025 *
2026 * outputs:
2027 * zc_objset_stats stats
2028 * zc_nvlist_dst property nvlist
2029 * zc_nvlist_dst_size size of property nvlist
2030 */
2031 static int
2032 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2033 {
2034 objset_t *os;
2035 int error;
2036
2037 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2038 if (error == 0) {
2039 error = zfs_ioc_objset_stats_impl(zc, os);
2040 dmu_objset_rele(os, FTAG);
2041 }
2042
2043 return (error);
2044 }
2045
2046 /*
2047 * inputs:
2048 * zc_name name of filesystem
2049 * zc_nvlist_dst_size size of buffer for property nvlist
2050 *
2051 * outputs:
2052 * zc_nvlist_dst received property nvlist
2053 * zc_nvlist_dst_size size of received property nvlist
2054 *
2055 * Gets received properties (distinct from local properties on or after
2056 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2057 * local property values.
2058 */
2059 static int
2060 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2061 {
2062 int error = 0;
2063 nvlist_t *nv;
2064
2065 /*
2066 * Without this check, we would return local property values if the
2067 * caller has not already received properties on or after
2068 * SPA_VERSION_RECVD_PROPS.
2069 */
2070 if (!dsl_prop_get_hasrecvd(zc->zc_name))
2071 return (SET_ERROR(ENOTSUP));
2072
2073 if (zc->zc_nvlist_dst != 0 &&
2074 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2075 error = put_nvlist(zc, nv);
2076 nvlist_free(nv);
2077 }
2078
2079 return (error);
2080 }
2081
2082 static int
2083 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2084 {
2085 uint64_t value;
2086 int error;
2087
2088 /*
2089 * zfs_get_zplprop() will either find a value or give us
2090 * the default value (if there is one).
2091 */
2092 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2093 return (error);
2094 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2095 return (0);
2096 }
2097
2098 /*
2099 * inputs:
2100 * zc_name name of filesystem
2101 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2102 *
2103 * outputs:
2104 * zc_nvlist_dst zpl property nvlist
2105 * zc_nvlist_dst_size size of zpl property nvlist
2106 */
2107 static int
2108 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2109 {
2110 objset_t *os;
2111 int err;
2112
2113 /* XXX reading without owning */
2114 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2115 return (err);
2116
2117 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2118
2119 /*
2120 * NB: nvl_add_zplprop() will read the objset contents,
2121 * which we aren't supposed to do with a DS_MODE_USER
2122 * hold, because it could be inconsistent.
2123 */
2124 if (zc->zc_nvlist_dst != NULL &&
2125 !zc->zc_objset_stats.dds_inconsistent &&
2126 dmu_objset_type(os) == DMU_OST_ZFS) {
2127 nvlist_t *nv;
2128
2129 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2130 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2131 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2132 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2133 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2134 err = put_nvlist(zc, nv);
2135 nvlist_free(nv);
2136 } else {
2137 err = SET_ERROR(ENOENT);
2138 }
2139 dmu_objset_rele(os, FTAG);
2140 return (err);
2141 }
2142
2143 static boolean_t
2144 dataset_name_hidden(const char *name)
2145 {
2146 /*
2147 * Skip over datasets that are not visible in this zone,
2148 * internal datasets (which have a $ in their name), and
2149 * temporary datasets (which have a % in their name).
2150 */
2151 if (strchr(name, '$') != NULL)
2152 return (B_TRUE);
2153 if (strchr(name, '%') != NULL)
2154 return (B_TRUE);
2155 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2156 return (B_TRUE);
2157 return (B_FALSE);
2158 }
2159
2160 /*
2161 * inputs:
2162 * zc_name name of filesystem
2163 * zc_cookie zap cursor
2164 * zc_nvlist_dst_size size of buffer for property nvlist
2165 *
2166 * outputs:
2167 * zc_name name of next filesystem
2168 * zc_cookie zap cursor
2169 * zc_objset_stats stats
2170 * zc_nvlist_dst property nvlist
2171 * zc_nvlist_dst_size size of property nvlist
2172 */
2173 static int
2174 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2175 {
2176 objset_t *os;
2177 int error;
2178 char *p;
2179 size_t orig_len = strlen(zc->zc_name);
2180
2181 top:
2182 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2183 if (error == ENOENT)
2184 error = SET_ERROR(ESRCH);
2185 return (error);
2186 }
2187
2188 p = strrchr(zc->zc_name, '/');
2189 if (p == NULL || p[1] != '\0')
2190 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2191 p = zc->zc_name + strlen(zc->zc_name);
2192
2193 do {
2194 error = dmu_dir_list_next(os,
2195 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2196 NULL, &zc->zc_cookie);
2197 if (error == ENOENT)
2198 error = SET_ERROR(ESRCH);
2199 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2200 dmu_objset_rele(os, FTAG);
2201
2202 /*
2203 * If it's an internal dataset (ie. with a '$' in its name),
2204 * don't try to get stats for it, otherwise we'll return ENOENT.
2205 */
2206 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2207 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2208 if (error == ENOENT) {
2209 /* We lost a race with destroy, get the next one. */
2210 zc->zc_name[orig_len] = '\0';
2211 goto top;
2212 }
2213 }
2214 return (error);
2215 }
2216
2217 /*
2218 * inputs:
2219 * zc_name name of filesystem
2220 * zc_cookie zap cursor
2221 * zc_nvlist_dst_size size of buffer for property nvlist
2222 *
2223 * outputs:
2224 * zc_name name of next snapshot
2225 * zc_objset_stats stats
2226 * zc_nvlist_dst property nvlist
2227 * zc_nvlist_dst_size size of property nvlist
2228 */
2229 static int
2230 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2231 {
2232 objset_t *os;
2233 int error;
2234
2235 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2236 if (error != 0) {
2237 return (error == ENOENT ? ESRCH : error);
2238 }
2239
2240 /*
2241 * A dataset name of maximum length cannot have any snapshots,
2242 * so exit immediately.
2243 */
2244 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2245 dmu_objset_rele(os, FTAG);
2246 return (SET_ERROR(ESRCH));
2247 }
2248
2249 error = dmu_snapshot_list_next(os,
2250 sizeof (zc->zc_name) - strlen(zc->zc_name),
2251 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2252 NULL);
2253
2254 if (error == 0) {
2255 dsl_dataset_t *ds;
2256 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2257
2258 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2259 if (error == 0) {
2260 objset_t *ossnap;
2261
2262 error = dmu_objset_from_ds(ds, &ossnap);
2263 if (error == 0)
2264 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2265 dsl_dataset_rele(ds, FTAG);
2266 }
2267 } else if (error == ENOENT) {
2268 error = SET_ERROR(ESRCH);
2269 }
2270
2271 dmu_objset_rele(os, FTAG);
2272 /* if we failed, undo the @ that we tacked on to zc_name */
2273 if (error != 0)
2274 *strchr(zc->zc_name, '@') = '\0';
2275 return (error);
2276 }
2277
2278 static int
2279 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2280 {
2281 const char *propname = nvpair_name(pair);
2282 uint64_t *valary;
2283 unsigned int vallen;
2284 const char *domain;
2285 char *dash;
2286 zfs_userquota_prop_t type;
2287 uint64_t rid;
2288 uint64_t quota;
2289 zfsvfs_t *zfsvfs;
2290 int err;
2291
2292 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2293 nvlist_t *attrs;
2294 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2295 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2296 &pair) != 0)
2297 return (SET_ERROR(EINVAL));
2298 }
2299
2300 /*
2301 * A correctly constructed propname is encoded as
2302 * userquota@<rid>-<domain>.
2303 */
2304 if ((dash = strchr(propname, '-')) == NULL ||
2305 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2306 vallen != 3)
2307 return (SET_ERROR(EINVAL));
2308
2309 domain = dash + 1;
2310 type = valary[0];
2311 rid = valary[1];
2312 quota = valary[2];
2313
2314 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2315 if (err == 0) {
2316 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2317 zfsvfs_rele(zfsvfs, FTAG);
2318 }
2319
2320 return (err);
2321 }
2322
2323 /*
2324 * If the named property is one that has a special function to set its value,
2325 * return 0 on success and a positive error code on failure; otherwise if it is
2326 * not one of the special properties handled by this function, return -1.
2327 *
2328 * XXX: It would be better for callers of the property interface if we handled
2329 * these special cases in dsl_prop.c (in the dsl layer).
2330 */
2331 static int
2332 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2333 nvpair_t *pair)
2334 {
2335 const char *propname = nvpair_name(pair);
2336 zfs_prop_t prop = zfs_name_to_prop(propname);
2337 uint64_t intval;
2338 int err;
2339
2340 if (prop == ZPROP_INVAL) {
2341 if (zfs_prop_userquota(propname))
2342 return (zfs_prop_set_userquota(dsname, pair));
2343 return (-1);
2344 }
2345
2346 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2347 nvlist_t *attrs;
2348 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2349 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2350 &pair) == 0);
2351 }
2352
2353 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2354 return (-1);
2355
2356 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2357
2358 switch (prop) {
2359 case ZFS_PROP_QUOTA:
2360 err = dsl_dir_set_quota(dsname, source, intval);
2361 break;
2362 case ZFS_PROP_REFQUOTA:
2363 err = dsl_dataset_set_refquota(dsname, source, intval);
2364 break;
2365 case ZFS_PROP_RESERVATION:
2366 err = dsl_dir_set_reservation(dsname, source, intval);
2367 break;
2368 case ZFS_PROP_REFRESERVATION:
2369 err = dsl_dataset_set_refreservation(dsname, source, intval);
2370 break;
2371 case ZFS_PROP_VOLSIZE:
2372 err = zvol_set_volsize(dsname, intval);
2373 break;
2374 case ZFS_PROP_VERSION:
2375 {
2376 zfsvfs_t *zfsvfs;
2377
2378 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2379 break;
2380
2381 err = zfs_set_version(zfsvfs, intval);
2382 zfsvfs_rele(zfsvfs, FTAG);
2383
2384 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2385 zfs_cmd_t *zc;
2386
2387 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2388 (void) strcpy(zc->zc_name, dsname);
2389 (void) zfs_ioc_userspace_upgrade(zc);
2390 kmem_free(zc, sizeof (zfs_cmd_t));
2391 }
2392 break;
2393 }
2394 case ZFS_PROP_COMPRESSION:
2395 {
2396 if (intval == ZIO_COMPRESS_LZ4) {
2397 zfeature_info_t *feature =
2398 &spa_feature_table[SPA_FEATURE_LZ4_COMPRESS];
2399 spa_t *spa;
2400
2401 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
2402 return (err);
2403
2404 /*
2405 * Setting the LZ4 compression algorithm activates
2406 * the feature.
2407 */
2408 if (!spa_feature_is_active(spa, feature)) {
2409 if ((err = zfs_prop_activate_feature(spa,
2410 feature)) != 0) {
2411 spa_close(spa, FTAG);
2412 return (err);
2413 }
2414 }
2415
2416 spa_close(spa, FTAG);
2417 }
2418 /*
2419 * We still want the default set action to be performed in the
2420 * caller, we only performed zfeature settings here.
2421 */
2422 err = -1;
2423 break;
2424 }
2425
2426 default:
2427 err = -1;
2428 }
2429
2430 return (err);
2431 }
2432
2433 /*
2434 * This function is best effort. If it fails to set any of the given properties,
2435 * it continues to set as many as it can and returns the last error
2436 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2437 * with the list of names of all the properties that failed along with the
2438 * corresponding error numbers.
2439 *
2440 * If every property is set successfully, zero is returned and errlist is not
2441 * modified.
2442 */
2443 int
2444 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2445 nvlist_t *errlist)
2446 {
2447 nvpair_t *pair;
2448 nvpair_t *propval;
2449 int rv = 0;
2450 uint64_t intval;
2451 char *strval;
2452 nvlist_t *genericnvl = fnvlist_alloc();
2453 nvlist_t *retrynvl = fnvlist_alloc();
2454
2455 retry:
2456 pair = NULL;
2457 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2458 const char *propname = nvpair_name(pair);
2459 zfs_prop_t prop = zfs_name_to_prop(propname);
2460 int err = 0;
2461
2462 /* decode the property value */
2463 propval = pair;
2464 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2465 nvlist_t *attrs;
2466 attrs = fnvpair_value_nvlist(pair);
2467 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2468 &propval) != 0)
2469 err = SET_ERROR(EINVAL);
2470 }
2471
2472 /* Validate value type */
2473 if (err == 0 && prop == ZPROP_INVAL) {
2474 if (zfs_prop_user(propname)) {
2475 if (nvpair_type(propval) != DATA_TYPE_STRING)
2476 err = SET_ERROR(EINVAL);
2477 } else if (zfs_prop_userquota(propname)) {
2478 if (nvpair_type(propval) !=
2479 DATA_TYPE_UINT64_ARRAY)
2480 err = SET_ERROR(EINVAL);
2481 } else {
2482 err = SET_ERROR(EINVAL);
2483 }
2484 } else if (err == 0) {
2485 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2486 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2487 err = SET_ERROR(EINVAL);
2488 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2489 const char *unused;
2490
2491 intval = fnvpair_value_uint64(propval);
2492
2493 switch (zfs_prop_get_type(prop)) {
2494 case PROP_TYPE_NUMBER:
2495 break;
2496 case PROP_TYPE_STRING:
2497 err = SET_ERROR(EINVAL);
2498 break;
2499 case PROP_TYPE_INDEX:
2500 if (zfs_prop_index_to_string(prop,
2501 intval, &unused) != 0)
2502 err = SET_ERROR(EINVAL);
2503 break;
2504 default:
2505 cmn_err(CE_PANIC,
2506 "unknown property type");
2507 }
2508 } else {
2509 err = SET_ERROR(EINVAL);
2510 }
2511 }
2512
2513 /* Validate permissions */
2514 if (err == 0)
2515 err = zfs_check_settable(dsname, pair, CRED());
2516
2517 if (err == 0) {
2518 err = zfs_prop_set_special(dsname, source, pair);
2519 if (err == -1) {
2520 /*
2521 * For better performance we build up a list of
2522 * properties to set in a single transaction.
2523 */
2524 err = nvlist_add_nvpair(genericnvl, pair);
2525 } else if (err != 0 && nvl != retrynvl) {
2526 /*
2527 * This may be a spurious error caused by
2528 * receiving quota and reservation out of order.
2529 * Try again in a second pass.
2530 */
2531 err = nvlist_add_nvpair(retrynvl, pair);
2532 }
2533 }
2534
2535 if (err != 0) {
2536 if (errlist != NULL)
2537 fnvlist_add_int32(errlist, propname, err);
2538 rv = err;
2539 }
2540 }
2541
2542 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2543 nvl = retrynvl;
2544 goto retry;
2545 }
2546
2547 if (!nvlist_empty(genericnvl) &&
2548 dsl_props_set(dsname, source, genericnvl) != 0) {
2549 /*
2550 * If this fails, we still want to set as many properties as we
2551 * can, so try setting them individually.
2552 */
2553 pair = NULL;
2554 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2555 const char *propname = nvpair_name(pair);
2556 int err = 0;
2557
2558 propval = pair;
2559 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2560 nvlist_t *attrs;
2561 attrs = fnvpair_value_nvlist(pair);
2562 propval = fnvlist_lookup_nvpair(attrs,
2563 ZPROP_VALUE);
2564 }
2565
2566 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2567 strval = fnvpair_value_string(propval);
2568 err = dsl_prop_set_string(dsname, propname,
2569 source, strval);
2570 } else {
2571 intval = fnvpair_value_uint64(propval);
2572 err = dsl_prop_set_int(dsname, propname, source,
2573 intval);
2574 }
2575
2576 if (err != 0) {
2577 if (errlist != NULL) {
2578 fnvlist_add_int32(errlist, propname,
2579 err);
2580 }
2581 rv = err;
2582 }
2583 }
2584 }
2585 nvlist_free(genericnvl);
2586 nvlist_free(retrynvl);
2587
2588 return (rv);
2589 }
2590
2591 /*
2592 * Check that all the properties are valid user properties.
2593 */
2594 static int
2595 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2596 {
2597 nvpair_t *pair = NULL;
2598 int error = 0;
2599
2600 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2601 const char *propname = nvpair_name(pair);
2602 char *valstr;
2603
2604 if (!zfs_prop_user(propname) ||
2605 nvpair_type(pair) != DATA_TYPE_STRING)
2606 return (SET_ERROR(EINVAL));
2607
2608 if (error = zfs_secpolicy_write_perms(fsname,
2609 ZFS_DELEG_PERM_USERPROP, CRED()))
2610 return (error);
2611
2612 if (strlen(propname) >= ZAP_MAXNAMELEN)
2613 return (SET_ERROR(ENAMETOOLONG));
2614
2615 VERIFY(nvpair_value_string(pair, &valstr) == 0);
2616 if (strlen(valstr) >= ZAP_MAXVALUELEN)
2617 return (E2BIG);
2618 }
2619 return (0);
2620 }
2621
2622 static void
2623 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2624 {
2625 nvpair_t *pair;
2626
2627 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2628
2629 pair = NULL;
2630 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2631 if (nvlist_exists(skipped, nvpair_name(pair)))
2632 continue;
2633
2634 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2635 }
2636 }
2637
2638 static int
2639 clear_received_props(const char *dsname, nvlist_t *props,
2640 nvlist_t *skipped)
2641 {
2642 int err = 0;
2643 nvlist_t *cleared_props = NULL;
2644 props_skip(props, skipped, &cleared_props);
2645 if (!nvlist_empty(cleared_props)) {
2646 /*
2647 * Acts on local properties until the dataset has received
2648 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2649 */
2650 zprop_source_t flags = (ZPROP_SRC_NONE |
2651 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2652 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2653 }
2654 nvlist_free(cleared_props);
2655 return (err);
2656 }
2657
2658 /*
2659 * inputs:
2660 * zc_name name of filesystem
2661 * zc_value name of property to set
2662 * zc_nvlist_src{_size} nvlist of properties to apply
2663 * zc_cookie received properties flag
2664 *
2665 * outputs:
2666 * zc_nvlist_dst{_size} error for each unapplied received property
2667 */
2668 static int
2669 zfs_ioc_set_prop(zfs_cmd_t *zc)
2670 {
2671 nvlist_t *nvl;
2672 boolean_t received = zc->zc_cookie;
2673 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2674 ZPROP_SRC_LOCAL);
2675 nvlist_t *errors;
2676 int error;
2677
2678 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2679 zc->zc_iflags, &nvl)) != 0)
2680 return (error);
2681
2682 if (received) {
2683 nvlist_t *origprops;
2684
2685 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2686 (void) clear_received_props(zc->zc_name,
2687 origprops, nvl);
2688 nvlist_free(origprops);
2689 }
2690
2691 error = dsl_prop_set_hasrecvd(zc->zc_name);
2692 }
2693
2694 errors = fnvlist_alloc();
2695 if (error == 0)
2696 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2697
2698 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2699 (void) put_nvlist(zc, errors);
2700 }
2701
2702 nvlist_free(errors);
2703 nvlist_free(nvl);
2704 return (error);
2705 }
2706
2707 /*
2708 * inputs:
2709 * zc_name name of filesystem
2710 * zc_value name of property to inherit
2711 * zc_cookie revert to received value if TRUE
2712 *
2713 * outputs: none
2714 */
2715 static int
2716 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2717 {
2718 const char *propname = zc->zc_value;
2719 zfs_prop_t prop = zfs_name_to_prop(propname);
2720 boolean_t received = zc->zc_cookie;
2721 zprop_source_t source = (received
2722 ? ZPROP_SRC_NONE /* revert to received value, if any */
2723 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2724
2725 if (received) {
2726 nvlist_t *dummy;
2727 nvpair_t *pair;
2728 zprop_type_t type;
2729 int err;
2730
2731 /*
2732 * zfs_prop_set_special() expects properties in the form of an
2733 * nvpair with type info.
2734 */
2735 if (prop == ZPROP_INVAL) {
2736 if (!zfs_prop_user(propname))
2737 return (SET_ERROR(EINVAL));
2738
2739 type = PROP_TYPE_STRING;
2740 } else if (prop == ZFS_PROP_VOLSIZE ||
2741 prop == ZFS_PROP_VERSION) {
2742 return (SET_ERROR(EINVAL));
2743 } else {
2744 type = zfs_prop_get_type(prop);
2745 }
2746
2747 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2748
2749 switch (type) {
2750 case PROP_TYPE_STRING:
2751 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2752 break;
2753 case PROP_TYPE_NUMBER:
2754 case PROP_TYPE_INDEX:
2755 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2756 break;
2757 default:
2758 nvlist_free(dummy);
2759 return (SET_ERROR(EINVAL));
2760 }
2761
2762 pair = nvlist_next_nvpair(dummy, NULL);
2763 err = zfs_prop_set_special(zc->zc_name, source, pair);
2764 nvlist_free(dummy);
2765 if (err != -1)
2766 return (err); /* special property already handled */
2767 } else {
2768 /*
2769 * Only check this in the non-received case. We want to allow
2770 * 'inherit -S' to revert non-inheritable properties like quota
2771 * and reservation to the received or default values even though
2772 * they are not considered inheritable.
2773 */
2774 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2775 return (SET_ERROR(EINVAL));
2776 }
2777
2778 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2779 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2780 }
2781
2782 static int
2783 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2784 {
2785 nvlist_t *props;
2786 spa_t *spa;
2787 int error;
2788 nvpair_t *pair;
2789
2790 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2791 zc->zc_iflags, &props))
2792 return (error);
2793
2794 /*
2795 * If the only property is the configfile, then just do a spa_lookup()
2796 * to handle the faulted case.
2797 */
2798 pair = nvlist_next_nvpair(props, NULL);
2799 if (pair != NULL && strcmp(nvpair_name(pair),
2800 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2801 nvlist_next_nvpair(props, pair) == NULL) {
2802 mutex_enter(&spa_namespace_lock);
2803 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2804 spa_configfile_set(spa, props, B_FALSE);
2805 spa_config_sync(spa, B_FALSE, B_TRUE);
2806 }
2807 mutex_exit(&spa_namespace_lock);
2808 if (spa != NULL) {
2809 nvlist_free(props);
2810 return (0);
2811 }
2812 }
2813
2814 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2815 nvlist_free(props);
2816 return (error);
2817 }
2818
2819 error = spa_prop_set(spa, props);
2820
2821 nvlist_free(props);
2822 spa_close(spa, FTAG);
2823
2824 return (error);
2825 }
2826
2827 static int
2828 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2829 {
2830 spa_t *spa;
2831 int error;
2832 nvlist_t *nvp = NULL;
2833
2834 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2835 /*
2836 * If the pool is faulted, there may be properties we can still
2837 * get (such as altroot and cachefile), so attempt to get them
2838 * anyway.
2839 */
2840 mutex_enter(&spa_namespace_lock);
2841 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2842 error = spa_prop_get(spa, &nvp);
2843 mutex_exit(&spa_namespace_lock);
2844 } else {
2845 error = spa_prop_get(spa, &nvp);
2846 spa_close(spa, FTAG);
2847 }
2848
2849 if (error == 0 && zc->zc_nvlist_dst != NULL)
2850 error = put_nvlist(zc, nvp);
2851 else
2852 error = SET_ERROR(EFAULT);
2853
2854 nvlist_free(nvp);
2855 return (error);
2856 }
2857
2858 /*
2859 * inputs:
2860 * zc_name name of filesystem
2861 * zc_nvlist_src{_size} nvlist of delegated permissions
2862 * zc_perm_action allow/unallow flag
2863 *
2864 * outputs: none
2865 */
2866 static int
2867 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2868 {
2869 int error;
2870 nvlist_t *fsaclnv = NULL;
2871
2872 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2873 zc->zc_iflags, &fsaclnv)) != 0)
2874 return (error);
2875
2876 /*
2877 * Verify nvlist is constructed correctly
2878 */
2879 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2880 nvlist_free(fsaclnv);
2881 return (SET_ERROR(EINVAL));
2882 }
2883
2884 /*
2885 * If we don't have PRIV_SYS_MOUNT, then validate
2886 * that user is allowed to hand out each permission in
2887 * the nvlist(s)
2888 */
2889
2890 error = secpolicy_zfs(CRED());
2891 if (error != 0) {
2892 if (zc->zc_perm_action == B_FALSE) {
2893 error = dsl_deleg_can_allow(zc->zc_name,
2894 fsaclnv, CRED());
2895 } else {
2896 error = dsl_deleg_can_unallow(zc->zc_name,
2897 fsaclnv, CRED());
2898 }
2899 }
2900
2901 if (error == 0)
2902 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2903
2904 nvlist_free(fsaclnv);
2905 return (error);
2906 }
2907
2908 /*
2909 * inputs:
2910 * zc_name name of filesystem
2911 *
2912 * outputs:
2913 * zc_nvlist_src{_size} nvlist of delegated permissions
2914 */
2915 static int
2916 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2917 {
2918 nvlist_t *nvp;
2919 int error;
2920
2921 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2922 error = put_nvlist(zc, nvp);
2923 nvlist_free(nvp);
2924 }
2925
2926 return (error);
2927 }
2928
2929 /*
2930 * Search the vfs list for a specified resource. Returns a pointer to it
2931 * or NULL if no suitable entry is found. The caller of this routine
2932 * is responsible for releasing the returned vfs pointer.
2933 */
2934 static vfs_t *
2935 zfs_get_vfs(const char *resource)
2936 {
2937 struct vfs *vfsp;
2938 struct vfs *vfs_found = NULL;
2939
2940 vfs_list_read_lock();
2941 vfsp = rootvfs;
2942 do {
2943 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2944 VFS_HOLD(vfsp);
2945 vfs_found = vfsp;
2946 break;
2947 }
2948 vfsp = vfsp->vfs_next;
2949 } while (vfsp != rootvfs);
2950 vfs_list_unlock();
2951 return (vfs_found);
2952 }
2953
2954 /* ARGSUSED */
2955 static void
2956 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2957 {
2958 zfs_creat_t *zct = arg;
2959
2960 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2961 }
2962
2963 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2964
2965 /*
2966 * inputs:
2967 * createprops list of properties requested by creator
2968 * default_zplver zpl version to use if unspecified in createprops
2969 * fuids_ok fuids allowed in this version of the spa?
2970 * os parent objset pointer (NULL if root fs)
2971 *
2972 * outputs:
2973 * zplprops values for the zplprops we attach to the master node object
2974 * is_ci true if requested file system will be purely case-insensitive
2975 *
2976 * Determine the settings for utf8only, normalization and
2977 * casesensitivity. Specific values may have been requested by the
2978 * creator and/or we can inherit values from the parent dataset. If
2979 * the file system is of too early a vintage, a creator can not
2980 * request settings for these properties, even if the requested
2981 * setting is the default value. We don't actually want to create dsl
2982 * properties for these, so remove them from the source nvlist after
2983 * processing.
2984 */
2985 static int
2986 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
2987 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
2988 nvlist_t *zplprops, boolean_t *is_ci)
2989 {
2990 uint64_t sense = ZFS_PROP_UNDEFINED;
2991 uint64_t norm = ZFS_PROP_UNDEFINED;
2992 uint64_t u8 = ZFS_PROP_UNDEFINED;
2993
2994 ASSERT(zplprops != NULL);
2995
2996 /*
2997 * Pull out creator prop choices, if any.
2998 */
2999 if (createprops) {
3000 (void) nvlist_lookup_uint64(createprops,
3001 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
3002 (void) nvlist_lookup_uint64(createprops,
3003 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
3004 (void) nvlist_remove_all(createprops,
3005 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
3006 (void) nvlist_lookup_uint64(createprops,
3007 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
3008 (void) nvlist_remove_all(createprops,
3009 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
3010 (void) nvlist_lookup_uint64(createprops,
3011 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3012 (void) nvlist_remove_all(createprops,
3013 zfs_prop_to_name(ZFS_PROP_CASE));
3014 }
3015
3016 /*
3017 * If the zpl version requested is whacky or the file system
3018 * or pool is version is too "young" to support normalization
3019 * and the creator tried to set a value for one of the props,
3020 * error out.
3021 */
3022 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3023 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3024 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3025 (zplver < ZPL_VERSION_NORMALIZATION &&
3026 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3027 sense != ZFS_PROP_UNDEFINED)))
3028 return (SET_ERROR(ENOTSUP));
3029
3030 /*
3031 * Put the version in the zplprops
3032 */
3033 VERIFY(nvlist_add_uint64(zplprops,
3034 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3035
3036 if (norm == ZFS_PROP_UNDEFINED)
3037 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3038 VERIFY(nvlist_add_uint64(zplprops,
3039 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3040
3041 /*
3042 * If we're normalizing, names must always be valid UTF-8 strings.
3043 */
3044 if (norm)
3045 u8 = 1;
3046 if (u8 == ZFS_PROP_UNDEFINED)
3047 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3048 VERIFY(nvlist_add_uint64(zplprops,
3049 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3050
3051 if (sense == ZFS_PROP_UNDEFINED)
3052 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3053 VERIFY(nvlist_add_uint64(zplprops,
3054 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3055
3056 if (is_ci)
3057 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3058
3059 return (0);
3060 }
3061
3062 static int
3063 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3064 nvlist_t *zplprops, boolean_t *is_ci)
3065 {
3066 boolean_t fuids_ok, sa_ok;
3067 uint64_t zplver = ZPL_VERSION;
3068 objset_t *os = NULL;
3069 char parentname[MAXNAMELEN];
3070 char *cp;
3071 spa_t *spa;
3072 uint64_t spa_vers;
3073 int error;
3074
3075 (void) strlcpy(parentname, dataset, sizeof (parentname));
3076 cp = strrchr(parentname, '/');
3077 ASSERT(cp != NULL);
3078 cp[0] = '\0';
3079
3080 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3081 return (error);
3082
3083 spa_vers = spa_version(spa);
3084 spa_close(spa, FTAG);
3085
3086 zplver = zfs_zpl_version_map(spa_vers);
3087 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3088 sa_ok = (zplver >= ZPL_VERSION_SA);
3089
3090 /*
3091 * Open parent object set so we can inherit zplprop values.
3092 */
3093 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3094 return (error);
3095
3096 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3097 zplprops, is_ci);
3098 dmu_objset_rele(os, FTAG);
3099 return (error);
3100 }
3101
3102 static int
3103 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3104 nvlist_t *zplprops, boolean_t *is_ci)
3105 {
3106 boolean_t fuids_ok;
3107 boolean_t sa_ok;
3108 uint64_t zplver = ZPL_VERSION;
3109 int error;
3110
3111 zplver = zfs_zpl_version_map(spa_vers);
3112 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3113 sa_ok = (zplver >= ZPL_VERSION_SA);
3114
3115 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3116 createprops, zplprops, is_ci);
3117 return (error);
3118 }
3119
3120 /*
3121 * innvl: {
3122 * "type" -> dmu_objset_type_t (int32)
3123 * (optional) "props" -> { prop -> value }
3124 * }
3125 *
3126 * outnvl: propname -> error code (int32)
3127 */
3128 static int
3129 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3130 {
3131 int error = 0;
3132 zfs_creat_t zct = { 0 };
3133 nvlist_t *nvprops = NULL;
3134 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3135 int32_t type32;
3136 dmu_objset_type_t type;
3137 boolean_t is_insensitive = B_FALSE;
3138
3139 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3140 return (SET_ERROR(EINVAL));
3141 type = type32;
3142 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3143
3144 switch (type) {
3145 case DMU_OST_ZFS:
3146 cbfunc = zfs_create_cb;
3147 break;
3148
3149 case DMU_OST_ZVOL:
3150 cbfunc = zvol_create_cb;
3151 break;
3152
3153 default:
3154 cbfunc = NULL;
3155 break;
3156 }
3157 if (strchr(fsname, '@') ||
3158 strchr(fsname, '%'))
3159 return (SET_ERROR(EINVAL));
3160
3161 zct.zct_props = nvprops;
3162
3163 if (cbfunc == NULL)
3164 return (SET_ERROR(EINVAL));
3165
3166 if (type == DMU_OST_ZVOL) {
3167 uint64_t volsize, volblocksize;
3168
3169 if (nvprops == NULL)
3170 return (SET_ERROR(EINVAL));
3171 if (nvlist_lookup_uint64(nvprops,
3172 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3173 return (SET_ERROR(EINVAL));
3174
3175 if ((error = nvlist_lookup_uint64(nvprops,
3176 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3177 &volblocksize)) != 0 && error != ENOENT)
3178 return (SET_ERROR(EINVAL));
3179
3180 if (error != 0)
3181 volblocksize = zfs_prop_default_numeric(
3182 ZFS_PROP_VOLBLOCKSIZE);
3183
3184 if ((error = zvol_check_volblocksize(
3185 volblocksize)) != 0 ||
3186 (error = zvol_check_volsize(volsize,
3187 volblocksize)) != 0)
3188 return (error);
3189 } else if (type == DMU_OST_ZFS) {
3190 int error;
3191
3192 /*
3193 * We have to have normalization and
3194 * case-folding flags correct when we do the
3195 * file system creation, so go figure them out
3196 * now.
3197 */
3198 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3199 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3200 error = zfs_fill_zplprops(fsname, nvprops,
3201 zct.zct_zplprops, &is_insensitive);
3202 if (error != 0) {
3203 nvlist_free(zct.zct_zplprops);
3204 return (error);
3205 }
3206 }
3207
3208 error = dmu_objset_create(fsname, type,
3209 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3210 nvlist_free(zct.zct_zplprops);
3211
3212 /*
3213 * It would be nice to do this atomically.
3214 */
3215 if (error == 0)
3216 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3217 nvprops, outnvl);
3218 if (error != 0)
3219 (void) dsl_destroy_head(fsname);
3220 return (error);
3221 }
3222
3223 /*
3224 * innvl: {
3225 * "origin" -> name of origin snapshot
3226 * (optional) "props" -> { prop -> value }
3227 * }
3228 *
3229 * outnvl: propname -> error code (int32)
3230 */
3231 static int
3232 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3233 {
3234 int error = 0;
3235 nvlist_t *nvprops = NULL;
3236 char *origin_name;
3237
3238 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3239 return (SET_ERROR(EINVAL));
3240 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3241
3242 if (strchr(fsname, '@') ||
3243 strchr(fsname, '%'))
3244 return (SET_ERROR(EINVAL));
3245
3246 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3247 return (SET_ERROR(EINVAL));
3248 error = dmu_objset_clone(fsname, origin_name);
3249 if (error != 0)
3250 return (error);
3251
3252 /*
3253 * It would be nice to do this atomically.
3254 */
3255 if (error == 0) {
3256 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3257 nvprops, outnvl);
3258 if (error != 0)
3259 (void) dsl_destroy_head(fsname);
3260 }
3261 return (error);
3262 }
3263
3264 /*
3265 * innvl: {
3266 * "snaps" -> { snapshot1, snapshot2 }
3267 * (optional) "props" -> { prop -> value (string) }
3268 * }
3269 *
3270 * outnvl: snapshot -> error code (int32)
3271 */
3272 static int
3273 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3274 {
3275 nvlist_t *snaps;
3276 nvlist_t *props = NULL;
3277 int error, poollen;
3278 nvpair_t *pair;
3279
3280 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3281 if ((error = zfs_check_userprops(poolname, props)) != 0)
3282 return (error);
3283
3284 if (!nvlist_empty(props) &&
3285 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3286 return (SET_ERROR(ENOTSUP));
3287
3288 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3289 return (SET_ERROR(EINVAL));
3290 poollen = strlen(poolname);
3291 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3292 pair = nvlist_next_nvpair(snaps, pair)) {
3293 const char *name = nvpair_name(pair);
3294 const char *cp = strchr(name, '@');
3295
3296 /*
3297 * The snap name must contain an @, and the part after it must
3298 * contain only valid characters.
3299 */
3300 if (cp == NULL || snapshot_namecheck(cp + 1, NULL, NULL) != 0)
3301 return (SET_ERROR(EINVAL));
3302
3303 /*
3304 * The snap must be in the specified pool.
3305 */
3306 if (strncmp(name, poolname, poollen) != 0 ||
3307 (name[poollen] != '/' && name[poollen] != '@'))
3308 return (SET_ERROR(EXDEV));
3309
3310 /* This must be the only snap of this fs. */
3311 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3312 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3313 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3314 == 0) {
3315 return (SET_ERROR(EXDEV));
3316 }
3317 }
3318 }
3319
3320 error = dsl_dataset_snapshot(snaps, props, outnvl);
3321 return (error);
3322 }
3323
3324 /*
3325 * innvl: "message" -> string
3326 */
3327 /* ARGSUSED */
3328 static int
3329 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3330 {
3331 char *message;
3332 spa_t *spa;
3333 int error;
3334 char *poolname;
3335
3336 /*
3337 * The poolname in the ioctl is not set, we get it from the TSD,
3338 * which was set at the end of the last successful ioctl that allows
3339 * logging. The secpolicy func already checked that it is set.
3340 * Only one log ioctl is allowed after each successful ioctl, so
3341 * we clear the TSD here.
3342 */
3343 poolname = tsd_get(zfs_allow_log_key);
3344 (void) tsd_set(zfs_allow_log_key, NULL);
3345 error = spa_open(poolname, &spa, FTAG);
3346 strfree(poolname);
3347 if (error != 0)
3348 return (error);
3349
3350 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3351 spa_close(spa, FTAG);
3352 return (SET_ERROR(EINVAL));
3353 }
3354
3355 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3356 spa_close(spa, FTAG);
3357 return (SET_ERROR(ENOTSUP));
3358 }
3359
3360 error = spa_history_log(spa, message);
3361 spa_close(spa, FTAG);
3362 return (error);
3363 }
3364
3365 /*
3366 * The dp_config_rwlock must not be held when calling this, because the
3367 * unmount may need to write out data.
3368 *
3369 * This function is best-effort. Callers must deal gracefully if it
3370 * remains mounted (or is remounted after this call).
3371 */
3372 void
3373 zfs_unmount_snap(const char *snapname)
3374 {
3375 vfs_t *vfsp;
3376 zfsvfs_t *zfsvfs;
3377
3378 if (strchr(snapname, '@') == NULL)
3379 return;
3380
3381 vfsp = zfs_get_vfs(snapname);
3382 if (vfsp == NULL)
3383 return;
3384
3385 zfsvfs = vfsp->vfs_data;
3386 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3387
3388 if (vn_vfswlock(vfsp->vfs_vnodecovered) != 0) {
3389 VFS_RELE(vfsp);
3390 return;
3391 }
3392 VFS_RELE(vfsp);
3393
3394 /*
3395 * Always force the unmount for snapshots.
3396 */
3397 (void) dounmount(vfsp, MS_FORCE, kcred);
3398 }
3399
3400 /* ARGSUSED */
3401 static int
3402 zfs_unmount_snap_cb(const char *snapname, void *arg)
3403 {
3404 zfs_unmount_snap(snapname);
3405 return (0);
3406 }
3407
3408 /*
3409 * When a clone is destroyed, its origin may also need to be destroyed,
3410 * in which case it must be unmounted. This routine will do that unmount
3411 * if necessary.
3412 */
3413 void
3414 zfs_destroy_unmount_origin(const char *fsname)
3415 {
3416 int error;
3417 objset_t *os;
3418 dsl_dataset_t *ds;
3419
3420 error = dmu_objset_hold(fsname, FTAG, &os);
3421 if (error != 0)
3422 return;
3423 ds = dmu_objset_ds(os);
3424 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3425 char originname[MAXNAMELEN];
3426 dsl_dataset_name(ds->ds_prev, originname);
3427 dmu_objset_rele(os, FTAG);
3428 zfs_unmount_snap(originname);
3429 } else {
3430 dmu_objset_rele(os, FTAG);
3431 }
3432 }
3433
3434 /*
3435 * innvl: {
3436 * "snaps" -> { snapshot1, snapshot2 }
3437 * (optional boolean) "defer"
3438 * }
3439 *
3440 * outnvl: snapshot -> error code (int32)
3441 *
3442 */
3443 static int
3444 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3445 {
3446 int poollen;
3447 nvlist_t *snaps;
3448 nvpair_t *pair;
3449 boolean_t defer;
3450
3451 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3452 return (SET_ERROR(EINVAL));
3453 defer = nvlist_exists(innvl, "defer");
3454
3455 poollen = strlen(poolname);
3456 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3457 pair = nvlist_next_nvpair(snaps, pair)) {
3458 const char *name = nvpair_name(pair);
3459
3460 /*
3461 * The snap must be in the specified pool.
3462 */
3463 if (strncmp(name, poolname, poollen) != 0 ||
3464 (name[poollen] != '/' && name[poollen] != '@'))
3465 return (SET_ERROR(EXDEV));
3466
3467 zfs_unmount_snap(name);
3468 }
3469
3470 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3471 }
3472
3473 /*
3474 * inputs:
3475 * zc_name name of dataset to destroy
3476 * zc_objset_type type of objset
3477 * zc_defer_destroy mark for deferred destroy
3478 *
3479 * outputs: none
3480 */
3481 static int
3482 zfs_ioc_destroy(zfs_cmd_t *zc)
3483 {
3484 int err;
3485 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS)
3486 zfs_unmount_snap(zc->zc_name);
3487
3488 if (strchr(zc->zc_name, '@'))
3489 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3490 else
3491 err = dsl_destroy_head(zc->zc_name);
3492 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3493 (void) zvol_remove_minor(zc->zc_name);
3494 return (err);
3495 }
3496
3497 /*
3498 * inputs:
3499 * zc_name name of dataset to rollback (to most recent snapshot)
3500 *
3501 * outputs: none
3502 */
3503 static int
3504 zfs_ioc_rollback(zfs_cmd_t *zc)
3505 {
3506 zfsvfs_t *zfsvfs;
3507 int error;
3508
3509 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
3510 error = zfs_suspend_fs(zfsvfs);
3511 if (error == 0) {
3512 int resume_err;
3513
3514 error = dsl_dataset_rollback(zc->zc_name);
3515 resume_err = zfs_resume_fs(zfsvfs, zc->zc_name);
3516 error = error ? error : resume_err;
3517 }
3518 VFS_RELE(zfsvfs->z_vfs);
3519 } else {
3520 error = dsl_dataset_rollback(zc->zc_name);
3521 }
3522 return (error);
3523 }
3524
3525 static int
3526 recursive_unmount(const char *fsname, void *arg)
3527 {
3528 const char *snapname = arg;
3529 char fullname[MAXNAMELEN];
3530
3531 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3532 zfs_unmount_snap(fullname);
3533 return (0);
3534 }
3535
3536 /*
3537 * inputs:
3538 * zc_name old name of dataset
3539 * zc_value new name of dataset
3540 * zc_cookie recursive flag (only valid for snapshots)
3541 *
3542 * outputs: none
3543 */
3544 static int
3545 zfs_ioc_rename(zfs_cmd_t *zc)
3546 {
3547 boolean_t recursive = zc->zc_cookie & 1;
3548 char *at;
3549
3550 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3551 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3552 strchr(zc->zc_value, '%'))
3553 return (SET_ERROR(EINVAL));
3554
3555 at = strchr(zc->zc_name, '@');
3556 if (at != NULL) {
3557 /* snaps must be in same fs */
3558 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3559 return (SET_ERROR(EXDEV));
3560 *at = '\0';
3561 if (zc->zc_objset_type == DMU_OST_ZFS) {
3562 int error = dmu_objset_find(zc->zc_name,
3563 recursive_unmount, at + 1,
3564 recursive ? DS_FIND_CHILDREN : 0);
3565 if (error != 0)
3566 return (error);
3567 }
3568 return (dsl_dataset_rename_snapshot(zc->zc_name,
3569 at + 1, strchr(zc->zc_value, '@') + 1, recursive));
3570 } else {
3571 if (zc->zc_objset_type == DMU_OST_ZVOL)
3572 (void) zvol_remove_minor(zc->zc_name);
3573 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3574 }
3575 }
3576
3577 static int
3578 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3579 {
3580 const char *propname = nvpair_name(pair);
3581 boolean_t issnap = (strchr(dsname, '@') != NULL);
3582 zfs_prop_t prop = zfs_name_to_prop(propname);
3583 uint64_t intval;
3584 int err;
3585
3586 if (prop == ZPROP_INVAL) {
3587 if (zfs_prop_user(propname)) {
3588 if (err = zfs_secpolicy_write_perms(dsname,
3589 ZFS_DELEG_PERM_USERPROP, cr))
3590 return (err);
3591 return (0);
3592 }
3593
3594 if (!issnap && zfs_prop_userquota(propname)) {
3595 const char *perm = NULL;
3596 const char *uq_prefix =
3597 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3598 const char *gq_prefix =
3599 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3600
3601 if (strncmp(propname, uq_prefix,
3602 strlen(uq_prefix)) == 0) {
3603 perm = ZFS_DELEG_PERM_USERQUOTA;
3604 } else if (strncmp(propname, gq_prefix,
3605 strlen(gq_prefix)) == 0) {
3606 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3607 } else {
3608 /* USERUSED and GROUPUSED are read-only */
3609 return (SET_ERROR(EINVAL));
3610 }
3611
3612 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3613 return (err);
3614 return (0);
3615 }
3616
3617 return (SET_ERROR(EINVAL));
3618 }
3619
3620 if (issnap)
3621 return (SET_ERROR(EINVAL));
3622
3623 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3624 /*
3625 * dsl_prop_get_all_impl() returns properties in this
3626 * format.
3627 */
3628 nvlist_t *attrs;
3629 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3630 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3631 &pair) == 0);
3632 }
3633
3634 /*
3635 * Check that this value is valid for this pool version
3636 */
3637 switch (prop) {
3638 case ZFS_PROP_COMPRESSION:
3639 /*
3640 * If the user specified gzip compression, make sure
3641 * the SPA supports it. We ignore any errors here since
3642 * we'll catch them later.
3643 */
3644 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3645 nvpair_value_uint64(pair, &intval) == 0) {
3646 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3647 intval <= ZIO_COMPRESS_GZIP_9 &&
3648 zfs_earlier_version(dsname,
3649 SPA_VERSION_GZIP_COMPRESSION)) {
3650 return (SET_ERROR(ENOTSUP));
3651 }
3652
3653 if (intval == ZIO_COMPRESS_ZLE &&
3654 zfs_earlier_version(dsname,
3655 SPA_VERSION_ZLE_COMPRESSION))
3656 return (SET_ERROR(ENOTSUP));
3657
3658 if (intval == ZIO_COMPRESS_LZ4) {
3659 zfeature_info_t *feature =
3660 &spa_feature_table[
3661 SPA_FEATURE_LZ4_COMPRESS];
3662 spa_t *spa;
3663
3664 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3665 return (err);
3666
3667 if (!spa_feature_is_enabled(spa, feature)) {
3668 spa_close(spa, FTAG);
3669 return (SET_ERROR(ENOTSUP));
3670 }
3671 spa_close(spa, FTAG);
3672 }
3673
3674 /*
3675 * If this is a bootable dataset then
3676 * verify that the compression algorithm
3677 * is supported for booting. We must return
3678 * something other than ENOTSUP since it
3679 * implies a downrev pool version.
3680 */
3681 if (zfs_is_bootfs(dsname) &&
3682 !BOOTFS_COMPRESS_VALID(intval)) {
3683 return (SET_ERROR(ERANGE));
3684 }
3685 }
3686 break;
3687
3688 case ZFS_PROP_COPIES:
3689 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3690 return (SET_ERROR(ENOTSUP));
3691 break;
3692
3693 case ZFS_PROP_DEDUP:
3694 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3695 return (SET_ERROR(ENOTSUP));
3696 break;
3697
3698 case ZFS_PROP_SHARESMB:
3699 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3700 return (SET_ERROR(ENOTSUP));
3701 break;
3702
3703 case ZFS_PROP_ACLINHERIT:
3704 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3705 nvpair_value_uint64(pair, &intval) == 0) {
3706 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3707 zfs_earlier_version(dsname,
3708 SPA_VERSION_PASSTHROUGH_X))
3709 return (SET_ERROR(ENOTSUP));
3710 }
3711 break;
3712 }
3713
3714 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3715 }
3716
3717 /*
3718 * Checks for a race condition to make sure we don't increment a feature flag
3719 * multiple times.
3720 */
3721 static int
3722 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
3723 {
3724 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3725 zfeature_info_t *feature = arg;
3726
3727 if (!spa_feature_is_active(spa, feature))
3728 return (0);
3729 else
3730 return (SET_ERROR(EBUSY));
3731 }
3732
3733 /*
3734 * The callback invoked on feature activation in the sync task caused by
3735 * zfs_prop_activate_feature.
3736 */
3737 static void
3738 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
3739 {
3740 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3741 zfeature_info_t *feature = arg;
3742
3743 spa_feature_incr(spa, feature, tx);
3744 }
3745
3746 /*
3747 * Activates a feature on a pool in response to a property setting. This
3748 * creates a new sync task which modifies the pool to reflect the feature
3749 * as being active.
3750 */
3751 static int
3752 zfs_prop_activate_feature(spa_t *spa, zfeature_info_t *feature)
3753 {
3754 int err;
3755
3756 /* EBUSY here indicates that the feature is already active */
3757 err = dsl_sync_task(spa_name(spa),
3758 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
3759 feature, 2);
3760
3761 if (err != 0 && err != EBUSY)
3762 return (err);
3763 else
3764 return (0);
3765 }
3766
3767 /*
3768 * Removes properties from the given props list that fail permission checks
3769 * needed to clear them and to restore them in case of a receive error. For each
3770 * property, make sure we have both set and inherit permissions.
3771 *
3772 * Returns the first error encountered if any permission checks fail. If the
3773 * caller provides a non-NULL errlist, it also gives the complete list of names
3774 * of all the properties that failed a permission check along with the
3775 * corresponding error numbers. The caller is responsible for freeing the
3776 * returned errlist.
3777 *
3778 * If every property checks out successfully, zero is returned and the list
3779 * pointed at by errlist is NULL.
3780 */
3781 static int
3782 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3783 {
3784 zfs_cmd_t *zc;
3785 nvpair_t *pair, *next_pair;
3786 nvlist_t *errors;
3787 int err, rv = 0;
3788
3789 if (props == NULL)
3790 return (0);
3791
3792 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3793
3794 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3795 (void) strcpy(zc->zc_name, dataset);
3796 pair = nvlist_next_nvpair(props, NULL);
3797 while (pair != NULL) {
3798 next_pair = nvlist_next_nvpair(props, pair);
3799
3800 (void) strcpy(zc->zc_value, nvpair_name(pair));
3801 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3802 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
3803 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3804 VERIFY(nvlist_add_int32(errors,
3805 zc->zc_value, err) == 0);
3806 }
3807 pair = next_pair;
3808 }
3809 kmem_free(zc, sizeof (zfs_cmd_t));
3810
3811 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3812 nvlist_free(errors);
3813 errors = NULL;
3814 } else {
3815 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3816 }
3817
3818 if (errlist == NULL)
3819 nvlist_free(errors);
3820 else
3821 *errlist = errors;
3822
3823 return (rv);
3824 }
3825
3826 static boolean_t
3827 propval_equals(nvpair_t *p1, nvpair_t *p2)
3828 {
3829 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3830 /* dsl_prop_get_all_impl() format */
3831 nvlist_t *attrs;
3832 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3833 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3834 &p1) == 0);
3835 }
3836
3837 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3838 nvlist_t *attrs;
3839 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3840 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3841 &p2) == 0);
3842 }
3843
3844 if (nvpair_type(p1) != nvpair_type(p2))
3845 return (B_FALSE);
3846
3847 if (nvpair_type(p1) == DATA_TYPE_STRING) {
3848 char *valstr1, *valstr2;
3849
3850 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
3851 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
3852 return (strcmp(valstr1, valstr2) == 0);
3853 } else {
3854 uint64_t intval1, intval2;
3855
3856 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
3857 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
3858 return (intval1 == intval2);
3859 }
3860 }
3861
3862 /*
3863 * Remove properties from props if they are not going to change (as determined
3864 * by comparison with origprops). Remove them from origprops as well, since we
3865 * do not need to clear or restore properties that won't change.
3866 */
3867 static void
3868 props_reduce(nvlist_t *props, nvlist_t *origprops)
3869 {
3870 nvpair_t *pair, *next_pair;
3871
3872 if (origprops == NULL)
3873 return; /* all props need to be received */
3874
3875 pair = nvlist_next_nvpair(props, NULL);
3876 while (pair != NULL) {
3877 const char *propname = nvpair_name(pair);
3878 nvpair_t *match;
3879
3880 next_pair = nvlist_next_nvpair(props, pair);
3881
3882 if ((nvlist_lookup_nvpair(origprops, propname,
3883 &match) != 0) || !propval_equals(pair, match))
3884 goto next; /* need to set received value */
3885
3886 /* don't clear the existing received value */
3887 (void) nvlist_remove_nvpair(origprops, match);
3888 /* don't bother receiving the property */
3889 (void) nvlist_remove_nvpair(props, pair);
3890 next:
3891 pair = next_pair;
3892 }
3893 }
3894
3895 #ifdef DEBUG
3896 static boolean_t zfs_ioc_recv_inject_err;
3897 #endif
3898
3899 /*
3900 * inputs:
3901 * zc_name name of containing filesystem
3902 * zc_nvlist_src{_size} nvlist of properties to apply
3903 * zc_value name of snapshot to create
3904 * zc_string name of clone origin (if DRR_FLAG_CLONE)
3905 * zc_cookie file descriptor to recv from
3906 * zc_begin_record the BEGIN record of the stream (not byteswapped)
3907 * zc_guid force flag
3908 * zc_cleanup_fd cleanup-on-exit file descriptor
3909 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
3910 *
3911 * outputs:
3912 * zc_cookie number of bytes read
3913 * zc_nvlist_dst{_size} error for each unapplied received property
3914 * zc_obj zprop_errflags_t
3915 * zc_action_handle handle for this guid/ds mapping
3916 */
3917 static int
3918 zfs_ioc_recv(zfs_cmd_t *zc)
3919 {
3920 file_t *fp;
3921 dmu_recv_cookie_t drc;
3922 boolean_t force = (boolean_t)zc->zc_guid;
3923 int fd;
3924 int error = 0;
3925 int props_error = 0;
3926 nvlist_t *errors;
3927 offset_t off;
3928 nvlist_t *props = NULL; /* sent properties */
3929 nvlist_t *origprops = NULL; /* existing properties */
3930 char *origin = NULL;
3931 char *tosnap;
3932 char tofs[ZFS_MAXNAMELEN];
3933 boolean_t first_recvd_props = B_FALSE;
3934
3935 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3936 strchr(zc->zc_value, '@') == NULL ||
3937 strchr(zc->zc_value, '%'))
3938 return (SET_ERROR(EINVAL));
3939
3940 (void) strcpy(tofs, zc->zc_value);
3941 tosnap = strchr(tofs, '@');
3942 *tosnap++ = '\0';
3943
3944 if (zc->zc_nvlist_src != NULL &&
3945 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
3946 zc->zc_iflags, &props)) != 0)
3947 return (error);
3948
3949 fd = zc->zc_cookie;
3950 fp = getf(fd);
3951 if (fp == NULL) {
3952 nvlist_free(props);
3953 return (SET_ERROR(EBADF));
3954 }
3955
3956 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3957
3958 if (zc->zc_string[0])
3959 origin = zc->zc_string;
3960
3961 error = dmu_recv_begin(tofs, tosnap,
3962 &zc->zc_begin_record, force, origin, &drc);
3963 if (error != 0)
3964 goto out;
3965
3966 /*
3967 * Set properties before we receive the stream so that they are applied
3968 * to the new data. Note that we must call dmu_recv_stream() if
3969 * dmu_recv_begin() succeeds.
3970 */
3971 if (props != NULL && !drc.drc_newfs) {
3972 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
3973 SPA_VERSION_RECVD_PROPS &&
3974 !dsl_prop_get_hasrecvd(tofs))
3975 first_recvd_props = B_TRUE;
3976
3977 /*
3978 * If new received properties are supplied, they are to
3979 * completely replace the existing received properties, so stash
3980 * away the existing ones.
3981 */
3982 if (dsl_prop_get_received(tofs, &origprops) == 0) {
3983 nvlist_t *errlist = NULL;
3984 /*
3985 * Don't bother writing a property if its value won't
3986 * change (and avoid the unnecessary security checks).
3987 *
3988 * The first receive after SPA_VERSION_RECVD_PROPS is a
3989 * special case where we blow away all local properties
3990 * regardless.
3991 */
3992 if (!first_recvd_props)
3993 props_reduce(props, origprops);
3994 if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
3995 (void) nvlist_merge(errors, errlist, 0);
3996 nvlist_free(errlist);
3997
3998 if (clear_received_props(tofs, origprops,
3999 first_recvd_props ? NULL : props) != 0)
4000 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4001 } else {
4002 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4003 }
4004 }
4005
4006 if (props != NULL) {
4007 props_error = dsl_prop_set_hasrecvd(tofs);
4008
4009 if (props_error == 0) {
4010 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4011 props, errors);
4012 }
4013 }
4014
4015 if (zc->zc_nvlist_dst_size != 0 &&
4016 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4017 put_nvlist(zc, errors) != 0)) {
4018 /*
4019 * Caller made zc->zc_nvlist_dst less than the minimum expected
4020 * size or supplied an invalid address.
4021 */
4022 props_error = SET_ERROR(EINVAL);
4023 }
4024
4025 off = fp->f_offset;
4026 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4027 &zc->zc_action_handle);
4028
4029 if (error == 0) {
4030 zfsvfs_t *zfsvfs = NULL;
4031
4032 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4033 /* online recv */
4034 int end_err;
4035
4036 error = zfs_suspend_fs(zfsvfs);
4037 /*
4038 * If the suspend fails, then the recv_end will
4039 * likely also fail, and clean up after itself.
4040 */
4041 end_err = dmu_recv_end(&drc);
4042 if (error == 0)
4043 error = zfs_resume_fs(zfsvfs, tofs);
4044 error = error ? error : end_err;
4045 VFS_RELE(zfsvfs->z_vfs);
4046 } else {
4047 error = dmu_recv_end(&drc);
4048 }
4049 }
4050
4051 zc->zc_cookie = off - fp->f_offset;
4052 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4053 fp->f_offset = off;
4054
4055 #ifdef DEBUG
4056 if (zfs_ioc_recv_inject_err) {
4057 zfs_ioc_recv_inject_err = B_FALSE;
4058 error = 1;
4059 }
4060 #endif
4061 /*
4062 * On error, restore the original props.
4063 */
4064 if (error != 0 && props != NULL && !drc.drc_newfs) {
4065 if (clear_received_props(tofs, props, NULL) != 0) {
4066 /*
4067 * We failed to clear the received properties.
4068 * Since we may have left a $recvd value on the
4069 * system, we can't clear the $hasrecvd flag.
4070 */
4071 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4072 } else if (first_recvd_props) {
4073 dsl_prop_unset_hasrecvd(tofs);
4074 }
4075
4076 if (origprops == NULL && !drc.drc_newfs) {
4077 /* We failed to stash the original properties. */
4078 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4079 }
4080
4081 /*
4082 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4083 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4084 * explictly if we're restoring local properties cleared in the
4085 * first new-style receive.
4086 */
4087 if (origprops != NULL &&
4088 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4089 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4090 origprops, NULL) != 0) {
4091 /*
4092 * We stashed the original properties but failed to
4093 * restore them.
4094 */
4095 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4096 }
4097 }
4098 out:
4099 nvlist_free(props);
4100 nvlist_free(origprops);
4101 nvlist_free(errors);
4102 releasef(fd);
4103
4104 if (error == 0)
4105 error = props_error;
4106
4107 return (error);
4108 }
4109
4110 /*
4111 * inputs:
4112 * zc_name name of snapshot to send
4113 * zc_cookie file descriptor to send stream to
4114 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4115 * zc_sendobj objsetid of snapshot to send
4116 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4117 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4118 * output size in zc_objset_type.
4119 *
4120 * outputs: none
4121 */
4122 static int
4123 zfs_ioc_send(zfs_cmd_t *zc)
4124 {
4125 int error;
4126 offset_t off;
4127 boolean_t estimate = (zc->zc_guid != 0);
4128
4129 if (zc->zc_obj != 0) {
4130 dsl_pool_t *dp;
4131 dsl_dataset_t *tosnap;
4132
4133 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4134 if (error != 0)
4135 return (error);
4136
4137 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4138 if (error != 0) {
4139 dsl_pool_rele(dp, FTAG);
4140 return (error);
4141 }
4142
4143 if (dsl_dir_is_clone(tosnap->ds_dir))
4144 zc->zc_fromobj = tosnap->ds_dir->dd_phys->dd_origin_obj;
4145 dsl_dataset_rele(tosnap, FTAG);
4146 dsl_pool_rele(dp, FTAG);
4147 }
4148
4149 if (estimate) {
4150 dsl_pool_t *dp;
4151 dsl_dataset_t *tosnap;
4152 dsl_dataset_t *fromsnap = NULL;
4153
4154 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4155 if (error != 0)
4156 return (error);
4157
4158 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4159 if (error != 0) {
4160 dsl_pool_rele(dp, FTAG);
4161 return (error);
4162 }
4163
4164 if (zc->zc_fromobj != 0) {
4165 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4166 FTAG, &fromsnap);
4167 if (error != 0) {
4168 dsl_dataset_rele(tosnap, FTAG);
4169 dsl_pool_rele(dp, FTAG);
4170 return (error);
4171 }
4172 }
4173
4174 error = dmu_send_estimate(tosnap, fromsnap,
4175 &zc->zc_objset_type);
4176
4177 if (fromsnap != NULL)
4178 dsl_dataset_rele(fromsnap, FTAG);
4179 dsl_dataset_rele(tosnap, FTAG);
4180 dsl_pool_rele(dp, FTAG);
4181 } else {
4182 file_t *fp = getf(zc->zc_cookie);
4183 if (fp == NULL)
4184 return (SET_ERROR(EBADF));
4185
4186 off = fp->f_offset;
4187 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4188 zc->zc_fromobj, zc->zc_cookie, fp->f_vnode, &off);
4189
4190 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4191 fp->f_offset = off;
4192 releasef(zc->zc_cookie);
4193 }
4194 return (error);
4195 }
4196
4197 /*
4198 * inputs:
4199 * zc_name name of snapshot on which to report progress
4200 * zc_cookie file descriptor of send stream
4201 *
4202 * outputs:
4203 * zc_cookie number of bytes written in send stream thus far
4204 */
4205 static int
4206 zfs_ioc_send_progress(zfs_cmd_t *zc)
4207 {
4208 dsl_pool_t *dp;
4209 dsl_dataset_t *ds;
4210 dmu_sendarg_t *dsp = NULL;
4211 int error;
4212
4213 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4214 if (error != 0)
4215 return (error);
4216
4217 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4218 if (error != 0) {
4219 dsl_pool_rele(dp, FTAG);
4220 return (error);
4221 }
4222
4223 mutex_enter(&ds->ds_sendstream_lock);
4224
4225 /*
4226 * Iterate over all the send streams currently active on this dataset.
4227 * If there's one which matches the specified file descriptor _and_ the
4228 * stream was started by the current process, return the progress of
4229 * that stream.
4230 */
4231 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4232 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4233 if (dsp->dsa_outfd == zc->zc_cookie &&
4234 dsp->dsa_proc == curproc)
4235 break;
4236 }
4237
4238 if (dsp != NULL)
4239 zc->zc_cookie = *(dsp->dsa_off);
4240 else
4241 error = SET_ERROR(ENOENT);
4242
4243 mutex_exit(&ds->ds_sendstream_lock);
4244 dsl_dataset_rele(ds, FTAG);
4245 dsl_pool_rele(dp, FTAG);
4246 return (error);
4247 }
4248
4249 static int
4250 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4251 {
4252 int id, error;
4253
4254 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4255 &zc->zc_inject_record);
4256
4257 if (error == 0)
4258 zc->zc_guid = (uint64_t)id;
4259
4260 return (error);
4261 }
4262
4263 static int
4264 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4265 {
4266 return (zio_clear_fault((int)zc->zc_guid));
4267 }
4268
4269 static int
4270 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4271 {
4272 int id = (int)zc->zc_guid;
4273 int error;
4274
4275 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4276 &zc->zc_inject_record);
4277
4278 zc->zc_guid = id;
4279
4280 return (error);
4281 }
4282
4283 static int
4284 zfs_ioc_error_log(zfs_cmd_t *zc)
4285 {
4286 spa_t *spa;
4287 int error;
4288 size_t count = (size_t)zc->zc_nvlist_dst_size;
4289
4290 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4291 return (error);
4292
4293 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4294 &count);
4295 if (error == 0)
4296 zc->zc_nvlist_dst_size = count;
4297 else
4298 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4299
4300 spa_close(spa, FTAG);
4301
4302 return (error);
4303 }
4304
4305 static int
4306 zfs_ioc_clear(zfs_cmd_t *zc)
4307 {
4308 spa_t *spa;
4309 vdev_t *vd;
4310 int error;
4311
4312 /*
4313 * On zpool clear we also fix up missing slogs
4314 */
4315 mutex_enter(&spa_namespace_lock);
4316 spa = spa_lookup(zc->zc_name);
4317 if (spa == NULL) {
4318 mutex_exit(&spa_namespace_lock);
4319 return (SET_ERROR(EIO));
4320 }
4321 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4322 /* we need to let spa_open/spa_load clear the chains */
4323 spa_set_log_state(spa, SPA_LOG_CLEAR);
4324 }
4325 spa->spa_last_open_failed = 0;
4326 mutex_exit(&spa_namespace_lock);
4327
4328 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4329 error = spa_open(zc->zc_name, &spa, FTAG);
4330 } else {
4331 nvlist_t *policy;
4332 nvlist_t *config = NULL;
4333
4334 if (zc->zc_nvlist_src == NULL)
4335 return (SET_ERROR(EINVAL));
4336
4337 if ((error = get_nvlist(zc->zc_nvlist_src,
4338 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4339 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4340 policy, &config);
4341 if (config != NULL) {
4342 int err;
4343
4344 if ((err = put_nvlist(zc, config)) != 0)
4345 error = err;
4346 nvlist_free(config);
4347 }
4348 nvlist_free(policy);
4349 }
4350 }
4351
4352 if (error != 0)
4353 return (error);
4354
4355 spa_vdev_state_enter(spa, SCL_NONE);
4356
4357 if (zc->zc_guid == 0) {
4358 vd = NULL;
4359 } else {
4360 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4361 if (vd == NULL) {
4362 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4363 spa_close(spa, FTAG);
4364 return (SET_ERROR(ENODEV));
4365 }
4366 }
4367
4368 vdev_clear(spa, vd);
4369
4370 (void) spa_vdev_state_exit(spa, NULL, 0);
4371
4372 /*
4373 * Resume any suspended I/Os.
4374 */
4375 if (zio_resume(spa) != 0)
4376 error = SET_ERROR(EIO);
4377
4378 spa_close(spa, FTAG);
4379
4380 return (error);
4381 }
4382
4383 static int
4384 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4385 {
4386 spa_t *spa;
4387 int error;
4388
4389 error = spa_open(zc->zc_name, &spa, FTAG);
4390 if (error != 0)
4391 return (error);
4392
4393 spa_vdev_state_enter(spa, SCL_NONE);
4394
4395 /*
4396 * If a resilver is already in progress then set the
4397 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4398 * the scan as a side effect of the reopen. Otherwise, let
4399 * vdev_open() decided if a resilver is required.
4400 */
4401 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4402 vdev_reopen(spa->spa_root_vdev);
4403 spa->spa_scrub_reopen = B_FALSE;
4404
4405 (void) spa_vdev_state_exit(spa, NULL, 0);
4406 spa_close(spa, FTAG);
4407 return (0);
4408 }
4409 /*
4410 * inputs:
4411 * zc_name name of filesystem
4412 * zc_value name of origin snapshot
4413 *
4414 * outputs:
4415 * zc_string name of conflicting snapshot, if there is one
4416 */
4417 static int
4418 zfs_ioc_promote(zfs_cmd_t *zc)
4419 {
4420 char *cp;
4421
4422 /*
4423 * We don't need to unmount *all* the origin fs's snapshots, but
4424 * it's easier.
4425 */
4426 cp = strchr(zc->zc_value, '@');
4427 if (cp)
4428 *cp = '\0';
4429 (void) dmu_objset_find(zc->zc_value,
4430 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4431 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4432 }
4433
4434 /*
4435 * Retrieve a single {user|group}{used|quota}@... property.
4436 *
4437 * inputs:
4438 * zc_name name of filesystem
4439 * zc_objset_type zfs_userquota_prop_t
4440 * zc_value domain name (eg. "S-1-234-567-89")
4441 * zc_guid RID/UID/GID
4442 *
4443 * outputs:
4444 * zc_cookie property value
4445 */
4446 static int
4447 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4448 {
4449 zfsvfs_t *zfsvfs;
4450 int error;
4451
4452 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4453 return (SET_ERROR(EINVAL));
4454
4455 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4456 if (error != 0)
4457 return (error);
4458
4459 error = zfs_userspace_one(zfsvfs,
4460 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4461 zfsvfs_rele(zfsvfs, FTAG);
4462
4463 return (error);
4464 }
4465
4466 /*
4467 * inputs:
4468 * zc_name name of filesystem
4469 * zc_cookie zap cursor
4470 * zc_objset_type zfs_userquota_prop_t
4471 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4472 *
4473 * outputs:
4474 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4475 * zc_cookie zap cursor
4476 */
4477 static int
4478 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4479 {
4480 zfsvfs_t *zfsvfs;
4481 int bufsize = zc->zc_nvlist_dst_size;
4482
4483 if (bufsize <= 0)
4484 return (SET_ERROR(ENOMEM));
4485
4486 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4487 if (error != 0)
4488 return (error);
4489
4490 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4491
4492 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4493 buf, &zc->zc_nvlist_dst_size);
4494
4495 if (error == 0) {
4496 error = xcopyout(buf,
4497 (void *)(uintptr_t)zc->zc_nvlist_dst,
4498 zc->zc_nvlist_dst_size);
4499 }
4500 kmem_free(buf, bufsize);
4501 zfsvfs_rele(zfsvfs, FTAG);
4502
4503 return (error);
4504 }
4505
4506 /*
4507 * inputs:
4508 * zc_name name of filesystem
4509 *
4510 * outputs:
4511 * none
4512 */
4513 static int
4514 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4515 {
4516 objset_t *os;
4517 int error = 0;
4518 zfsvfs_t *zfsvfs;
4519
4520 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4521 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4522 /*
4523 * If userused is not enabled, it may be because the
4524 * objset needs to be closed & reopened (to grow the
4525 * objset_phys_t). Suspend/resume the fs will do that.
4526 */
4527 error = zfs_suspend_fs(zfsvfs);
4528 if (error == 0)
4529 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4530 }
4531 if (error == 0)
4532 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4533 VFS_RELE(zfsvfs->z_vfs);
4534 } else {
4535 /* XXX kind of reading contents without owning */
4536 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4537 if (error != 0)
4538 return (error);
4539
4540 error = dmu_objset_userspace_upgrade(os);
4541 dmu_objset_rele(os, FTAG);
4542 }
4543
4544 return (error);
4545 }
4546
4547 /*
4548 * We don't want to have a hard dependency
4549 * against some special symbols in sharefs
4550 * nfs, and smbsrv. Determine them if needed when
4551 * the first file system is shared.
4552 * Neither sharefs, nfs or smbsrv are unloadable modules.
4553 */
4554 int (*znfsexport_fs)(void *arg);
4555 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4556 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4557
4558 int zfs_nfsshare_inited;
4559 int zfs_smbshare_inited;
4560
4561 ddi_modhandle_t nfs_mod;
4562 ddi_modhandle_t sharefs_mod;
4563 ddi_modhandle_t smbsrv_mod;
4564 kmutex_t zfs_share_lock;
4565
4566 static int
4567 zfs_init_sharefs()
4568 {
4569 int error;
4570
4571 ASSERT(MUTEX_HELD(&zfs_share_lock));
4572 /* Both NFS and SMB shares also require sharetab support. */
4573 if (sharefs_mod == NULL && ((sharefs_mod =
4574 ddi_modopen("fs/sharefs",
4575 KRTLD_MODE_FIRST, &error)) == NULL)) {
4576 return (SET_ERROR(ENOSYS));
4577 }
4578 if (zshare_fs == NULL && ((zshare_fs =
4579 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4580 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4581 return (SET_ERROR(ENOSYS));
4582 }
4583 return (0);
4584 }
4585
4586 static int
4587 zfs_ioc_share(zfs_cmd_t *zc)
4588 {
4589 int error;
4590 int opcode;
4591
4592 switch (zc->zc_share.z_sharetype) {
4593 case ZFS_SHARE_NFS:
4594 case ZFS_UNSHARE_NFS:
4595 if (zfs_nfsshare_inited == 0) {
4596 mutex_enter(&zfs_share_lock);
4597 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4598 KRTLD_MODE_FIRST, &error)) == NULL)) {
4599 mutex_exit(&zfs_share_lock);
4600 return (SET_ERROR(ENOSYS));
4601 }
4602 if (znfsexport_fs == NULL &&
4603 ((znfsexport_fs = (int (*)(void *))
4604 ddi_modsym(nfs_mod,
4605 "nfs_export", &error)) == NULL)) {
4606 mutex_exit(&zfs_share_lock);
4607 return (SET_ERROR(ENOSYS));
4608 }
4609 error = zfs_init_sharefs();
4610 if (error != 0) {
4611 mutex_exit(&zfs_share_lock);
4612 return (SET_ERROR(ENOSYS));
4613 }
4614 zfs_nfsshare_inited = 1;
4615 mutex_exit(&zfs_share_lock);
4616 }
4617 break;
4618 case ZFS_SHARE_SMB:
4619 case ZFS_UNSHARE_SMB:
4620 if (zfs_smbshare_inited == 0) {
4621 mutex_enter(&zfs_share_lock);
4622 if (smbsrv_mod == NULL && ((smbsrv_mod =
4623 ddi_modopen("drv/smbsrv",
4624 KRTLD_MODE_FIRST, &error)) == NULL)) {
4625 mutex_exit(&zfs_share_lock);
4626 return (SET_ERROR(ENOSYS));
4627 }
4628 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4629 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4630 "smb_server_share", &error)) == NULL)) {
4631 mutex_exit(&zfs_share_lock);
4632 return (SET_ERROR(ENOSYS));
4633 }
4634 error = zfs_init_sharefs();
4635 if (error != 0) {
4636 mutex_exit(&zfs_share_lock);
4637 return (SET_ERROR(ENOSYS));
4638 }
4639 zfs_smbshare_inited = 1;
4640 mutex_exit(&zfs_share_lock);
4641 }
4642 break;
4643 default:
4644 return (SET_ERROR(EINVAL));
4645 }
4646
4647 switch (zc->zc_share.z_sharetype) {
4648 case ZFS_SHARE_NFS:
4649 case ZFS_UNSHARE_NFS:
4650 if (error =
4651 znfsexport_fs((void *)
4652 (uintptr_t)zc->zc_share.z_exportdata))
4653 return (error);
4654 break;
4655 case ZFS_SHARE_SMB:
4656 case ZFS_UNSHARE_SMB:
4657 if (error = zsmbexport_fs((void *)
4658 (uintptr_t)zc->zc_share.z_exportdata,
4659 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4660 B_TRUE: B_FALSE)) {
4661 return (error);
4662 }
4663 break;
4664 }
4665
4666 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4667 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4668 SHAREFS_ADD : SHAREFS_REMOVE;
4669
4670 /*
4671 * Add or remove share from sharetab
4672 */
4673 error = zshare_fs(opcode,
4674 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4675 zc->zc_share.z_sharemax);
4676
4677 return (error);
4678
4679 }
4680
4681 ace_t full_access[] = {
4682 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4683 };
4684
4685 /*
4686 * inputs:
4687 * zc_name name of containing filesystem
4688 * zc_obj object # beyond which we want next in-use object #
4689 *
4690 * outputs:
4691 * zc_obj next in-use object #
4692 */
4693 static int
4694 zfs_ioc_next_obj(zfs_cmd_t *zc)
4695 {
4696 objset_t *os = NULL;
4697 int error;
4698
4699 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4700 if (error != 0)
4701 return (error);
4702
4703 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4704 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4705
4706 dmu_objset_rele(os, FTAG);
4707 return (error);
4708 }
4709
4710 /*
4711 * inputs:
4712 * zc_name name of filesystem
4713 * zc_value prefix name for snapshot
4714 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4715 *
4716 * outputs:
4717 * zc_value short name of new snapshot
4718 */
4719 static int
4720 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4721 {
4722 char *snap_name;
4723 char *hold_name;
4724 int error;
4725 minor_t minor;
4726
4727 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
4728 if (error != 0)
4729 return (error);
4730
4731 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
4732 (u_longlong_t)ddi_get_lbolt64());
4733 hold_name = kmem_asprintf("%%%s", zc->zc_value);
4734
4735 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
4736 hold_name);
4737 if (error == 0)
4738 (void) strcpy(zc->zc_value, snap_name);
4739 strfree(snap_name);
4740 strfree(hold_name);
4741 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
4742 return (error);
4743 }
4744
4745 /*
4746 * inputs:
4747 * zc_name name of "to" snapshot
4748 * zc_value name of "from" snapshot
4749 * zc_cookie file descriptor to write diff data on
4750 *
4751 * outputs:
4752 * dmu_diff_record_t's to the file descriptor
4753 */
4754 static int
4755 zfs_ioc_diff(zfs_cmd_t *zc)
4756 {
4757 file_t *fp;
4758 offset_t off;
4759 int error;
4760
4761 fp = getf(zc->zc_cookie);
4762 if (fp == NULL)
4763 return (SET_ERROR(EBADF));
4764
4765 off = fp->f_offset;
4766
4767 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
4768
4769 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4770 fp->f_offset = off;
4771 releasef(zc->zc_cookie);
4772
4773 return (error);
4774 }
4775
4776 /*
4777 * Remove all ACL files in shares dir
4778 */
4779 static int
4780 zfs_smb_acl_purge(znode_t *dzp)
4781 {
4782 zap_cursor_t zc;
4783 zap_attribute_t zap;
4784 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4785 int error;
4786
4787 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4788 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4789 zap_cursor_advance(&zc)) {
4790 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4791 NULL, 0)) != 0)
4792 break;
4793 }
4794 zap_cursor_fini(&zc);
4795 return (error);
4796 }
4797
4798 static int
4799 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4800 {
4801 vnode_t *vp;
4802 znode_t *dzp;
4803 vnode_t *resourcevp = NULL;
4804 znode_t *sharedir;
4805 zfsvfs_t *zfsvfs;
4806 nvlist_t *nvlist;
4807 char *src, *target;
4808 vattr_t vattr;
4809 vsecattr_t vsec;
4810 int error = 0;
4811
4812 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4813 NO_FOLLOW, NULL, &vp)) != 0)
4814 return (error);
4815
4816 /* Now make sure mntpnt and dataset are ZFS */
4817
4818 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4819 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4820 zc->zc_name) != 0)) {
4821 VN_RELE(vp);
4822 return (SET_ERROR(EINVAL));
4823 }
4824
4825 dzp = VTOZ(vp);
4826 zfsvfs = dzp->z_zfsvfs;
4827 ZFS_ENTER(zfsvfs);
4828
4829 /*
4830 * Create share dir if its missing.
4831 */
4832 mutex_enter(&zfsvfs->z_lock);
4833 if (zfsvfs->z_shares_dir == 0) {
4834 dmu_tx_t *tx;
4835
4836 tx = dmu_tx_create(zfsvfs->z_os);
4837 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
4838 ZFS_SHARES_DIR);
4839 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
4840 error = dmu_tx_assign(tx, TXG_WAIT);
4841 if (error != 0) {
4842 dmu_tx_abort(tx);
4843 } else {
4844 error = zfs_create_share_dir(zfsvfs, tx);
4845 dmu_tx_commit(tx);
4846 }
4847 if (error != 0) {
4848 mutex_exit(&zfsvfs->z_lock);
4849 VN_RELE(vp);
4850 ZFS_EXIT(zfsvfs);
4851 return (error);
4852 }
4853 }
4854 mutex_exit(&zfsvfs->z_lock);
4855
4856 ASSERT(zfsvfs->z_shares_dir);
4857 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
4858 VN_RELE(vp);
4859 ZFS_EXIT(zfsvfs);
4860 return (error);
4861 }
4862
4863 switch (zc->zc_cookie) {
4864 case ZFS_SMB_ACL_ADD:
4865 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
4866 vattr.va_type = VREG;
4867 vattr.va_mode = S_IFREG|0777;
4868 vattr.va_uid = 0;
4869 vattr.va_gid = 0;
4870
4871 vsec.vsa_mask = VSA_ACE;
4872 vsec.vsa_aclentp = &full_access;
4873 vsec.vsa_aclentsz = sizeof (full_access);
4874 vsec.vsa_aclcnt = 1;
4875
4876 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
4877 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
4878 if (resourcevp)
4879 VN_RELE(resourcevp);
4880 break;
4881
4882 case ZFS_SMB_ACL_REMOVE:
4883 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
4884 NULL, 0);
4885 break;
4886
4887 case ZFS_SMB_ACL_RENAME:
4888 if ((error = get_nvlist(zc->zc_nvlist_src,
4889 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
4890 VN_RELE(vp);
4891 ZFS_EXIT(zfsvfs);
4892 return (error);
4893 }
4894 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
4895 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
4896 &target)) {
4897 VN_RELE(vp);
4898 VN_RELE(ZTOV(sharedir));
4899 ZFS_EXIT(zfsvfs);
4900 nvlist_free(nvlist);
4901 return (error);
4902 }
4903 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
4904 kcred, NULL, 0);
4905 nvlist_free(nvlist);
4906 break;
4907
4908 case ZFS_SMB_ACL_PURGE:
4909 error = zfs_smb_acl_purge(sharedir);
4910 break;
4911
4912 default:
4913 error = SET_ERROR(EINVAL);
4914 break;
4915 }
4916
4917 VN_RELE(vp);
4918 VN_RELE(ZTOV(sharedir));
4919
4920 ZFS_EXIT(zfsvfs);
4921
4922 return (error);
4923 }
4924
4925 /*
4926 * innvl: {
4927 * "holds" -> { snapname -> holdname (string), ... }
4928 * (optional) "cleanup_fd" -> fd (int32)
4929 * }
4930 *
4931 * outnvl: {
4932 * snapname -> error value (int32)
4933 * ...
4934 * }
4935 */
4936 /* ARGSUSED */
4937 static int
4938 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
4939 {
4940 nvlist_t *holds;
4941 int cleanup_fd = -1;
4942 int error;
4943 minor_t minor = 0;
4944
4945 error = nvlist_lookup_nvlist(args, "holds", &holds);
4946 if (error != 0)
4947 return (SET_ERROR(EINVAL));
4948
4949 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
4950 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
4951 if (error != 0)
4952 return (error);
4953 }
4954
4955 error = dsl_dataset_user_hold(holds, minor, errlist);
4956 if (minor != 0)
4957 zfs_onexit_fd_rele(cleanup_fd);
4958 return (error);
4959 }
4960
4961 /*
4962 * innvl is not used.
4963 *
4964 * outnvl: {
4965 * holdname -> time added (uint64 seconds since epoch)
4966 * ...
4967 * }
4968 */
4969 /* ARGSUSED */
4970 static int
4971 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
4972 {
4973 return (dsl_dataset_get_holds(snapname, outnvl));
4974 }
4975
4976 /*
4977 * innvl: {
4978 * snapname -> { holdname, ... }
4979 * ...
4980 * }
4981 *
4982 * outnvl: {
4983 * snapname -> error value (int32)
4984 * ...
4985 * }
4986 */
4987 /* ARGSUSED */
4988 static int
4989 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
4990 {
4991 nvpair_t *pair;
4992
4993 /*
4994 * The release may cause the snapshot to be destroyed; make sure it
4995 * is not mounted.
4996 */
4997 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
4998 pair = nvlist_next_nvpair(holds, pair))
4999 zfs_unmount_snap(nvpair_name(pair));
5000
5001 return (dsl_dataset_user_release(holds, errlist));
5002 }
5003
5004 /*
5005 * inputs:
5006 * zc_name name of new filesystem or snapshot
5007 * zc_value full name of old snapshot
5008 *
5009 * outputs:
5010 * zc_cookie space in bytes
5011 * zc_objset_type compressed space in bytes
5012 * zc_perm_action uncompressed space in bytes
5013 */
5014 static int
5015 zfs_ioc_space_written(zfs_cmd_t *zc)
5016 {
5017 int error;
5018 dsl_pool_t *dp;
5019 dsl_dataset_t *new, *old;
5020
5021 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5022 if (error != 0)
5023 return (error);
5024 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5025 if (error != 0) {
5026 dsl_pool_rele(dp, FTAG);
5027 return (error);
5028 }
5029 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5030 if (error != 0) {
5031 dsl_dataset_rele(new, FTAG);
5032 dsl_pool_rele(dp, FTAG);
5033 return (error);
5034 }
5035
5036 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5037 &zc->zc_objset_type, &zc->zc_perm_action);
5038 dsl_dataset_rele(old, FTAG);
5039 dsl_dataset_rele(new, FTAG);
5040 dsl_pool_rele(dp, FTAG);
5041 return (error);
5042 }
5043
5044 /*
5045 * innvl: {
5046 * "firstsnap" -> snapshot name
5047 * }
5048 *
5049 * outnvl: {
5050 * "used" -> space in bytes
5051 * "compressed" -> compressed space in bytes
5052 * "uncompressed" -> uncompressed space in bytes
5053 * }
5054 */
5055 static int
5056 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5057 {
5058 int error;
5059 dsl_pool_t *dp;
5060 dsl_dataset_t *new, *old;
5061 char *firstsnap;
5062 uint64_t used, comp, uncomp;
5063
5064 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5065 return (SET_ERROR(EINVAL));
5066
5067 error = dsl_pool_hold(lastsnap, FTAG, &dp);
5068 if (error != 0)
5069 return (error);
5070
5071 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5072 if (error != 0) {
5073 dsl_pool_rele(dp, FTAG);
5074 return (error);
5075 }
5076 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5077 if (error != 0) {
5078 dsl_dataset_rele(new, FTAG);
5079 dsl_pool_rele(dp, FTAG);
5080 return (error);
5081 }
5082
5083 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5084 dsl_dataset_rele(old, FTAG);
5085 dsl_dataset_rele(new, FTAG);
5086 dsl_pool_rele(dp, FTAG);
5087 fnvlist_add_uint64(outnvl, "used", used);
5088 fnvlist_add_uint64(outnvl, "compressed", comp);
5089 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5090 return (error);
5091 }
5092
5093 /*
5094 * innvl: {
5095 * "fd" -> file descriptor to write stream to (int32)
5096 * (optional) "fromsnap" -> full snap name to send an incremental from
5097 * }
5098 *
5099 * outnvl is unused
5100 */
5101 /* ARGSUSED */
5102 static int
5103 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5104 {
5105 int error;
5106 offset_t off;
5107 char *fromname = NULL;
5108 int fd;
5109
5110 error = nvlist_lookup_int32(innvl, "fd", &fd);
5111 if (error != 0)
5112 return (SET_ERROR(EINVAL));
5113
5114 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5115
5116 file_t *fp = getf(fd);
5117 if (fp == NULL)
5118 return (SET_ERROR(EBADF));
5119
5120 off = fp->f_offset;
5121 error = dmu_send(snapname, fromname, fd, fp->f_vnode, &off);
5122
5123 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5124 fp->f_offset = off;
5125 releasef(fd);
5126 return (error);
5127 }
5128
5129 /*
5130 * Determine approximately how large a zfs send stream will be -- the number
5131 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5132 *
5133 * innvl: {
5134 * (optional) "fromsnap" -> full snap name to send an incremental from
5135 * }
5136 *
5137 * outnvl: {
5138 * "space" -> bytes of space (uint64)
5139 * }
5140 */
5141 static int
5142 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5143 {
5144 dsl_pool_t *dp;
5145 dsl_dataset_t *fromsnap = NULL;
5146 dsl_dataset_t *tosnap;
5147 int error;
5148 char *fromname;
5149 uint64_t space;
5150
5151 error = dsl_pool_hold(snapname, FTAG, &dp);
5152 if (error != 0)
5153 return (error);
5154
5155 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5156 if (error != 0) {
5157 dsl_pool_rele(dp, FTAG);
5158 return (error);
5159 }
5160
5161 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5162 if (error == 0) {
5163 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5164 if (error != 0) {
5165 dsl_dataset_rele(tosnap, FTAG);
5166 dsl_pool_rele(dp, FTAG);
5167 return (error);
5168 }
5169 }
5170
5171 error = dmu_send_estimate(tosnap, fromsnap, &space);
5172 fnvlist_add_uint64(outnvl, "space", space);
5173
5174 if (fromsnap != NULL)
5175 dsl_dataset_rele(fromsnap, FTAG);
5176 dsl_dataset_rele(tosnap, FTAG);
5177 dsl_pool_rele(dp, FTAG);
5178 return (error);
5179 }
5180
5181
5182 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5183
5184 static void
5185 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5186 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5187 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5188 {
5189 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5190
5191 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5192 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5193 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5194 ASSERT3P(vec->zvec_func, ==, NULL);
5195
5196 vec->zvec_legacy_func = func;
5197 vec->zvec_secpolicy = secpolicy;
5198 vec->zvec_namecheck = namecheck;
5199 vec->zvec_allow_log = log_history;
5200 vec->zvec_pool_check = pool_check;
5201 }
5202
5203 /*
5204 * See the block comment at the beginning of this file for details on
5205 * each argument to this function.
5206 */
5207 static void
5208 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5209 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5210 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5211 boolean_t allow_log)
5212 {
5213 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5214
5215 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5216 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5217 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5218 ASSERT3P(vec->zvec_func, ==, NULL);
5219
5220 /* if we are logging, the name must be valid */
5221 ASSERT(!allow_log || namecheck != NO_NAME);
5222
5223 vec->zvec_name = name;
5224 vec->zvec_func = func;
5225 vec->zvec_secpolicy = secpolicy;
5226 vec->zvec_namecheck = namecheck;
5227 vec->zvec_pool_check = pool_check;
5228 vec->zvec_smush_outnvlist = smush_outnvlist;
5229 vec->zvec_allow_log = allow_log;
5230 }
5231
5232 static void
5233 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5234 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5235 zfs_ioc_poolcheck_t pool_check)
5236 {
5237 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5238 POOL_NAME, log_history, pool_check);
5239 }
5240
5241 static void
5242 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5243 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5244 {
5245 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5246 DATASET_NAME, B_FALSE, pool_check);
5247 }
5248
5249 static void
5250 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5251 {
5252 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5253 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5254 }
5255
5256 static void
5257 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5258 zfs_secpolicy_func_t *secpolicy)
5259 {
5260 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5261 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5262 }
5263
5264 static void
5265 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5266 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5267 {
5268 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5269 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5270 }
5271
5272 static void
5273 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5274 {
5275 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5276 zfs_secpolicy_read);
5277 }
5278
5279 static void
5280 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5281 zfs_secpolicy_func_t *secpolicy)
5282 {
5283 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5284 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5285 }
5286
5287 static void
5288 zfs_ioctl_init(void)
5289 {
5290 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5291 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5292 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5293
5294 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5295 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5296 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5297
5298 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5299 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5300 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5301
5302 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5303 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5304 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5305
5306 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5307 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5308 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5309
5310 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5311 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5312 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5313
5314 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5315 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5316 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5317
5318 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5319 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5320 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5321
5322 zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5323 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5324 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5325 zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5326 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5327 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5328
5329 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5330 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5331 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5332
5333 /* IOCTLS that use the legacy function signature */
5334
5335 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5336 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5337
5338 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5339 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5340 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5341 zfs_ioc_pool_scan);
5342 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5343 zfs_ioc_pool_upgrade);
5344 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5345 zfs_ioc_vdev_add);
5346 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5347 zfs_ioc_vdev_remove);
5348 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5349 zfs_ioc_vdev_set_state);
5350 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5351 zfs_ioc_vdev_attach);
5352 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5353 zfs_ioc_vdev_detach);
5354 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5355 zfs_ioc_vdev_setpath);
5356 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5357 zfs_ioc_vdev_setfru);
5358 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5359 zfs_ioc_pool_set_props);
5360 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5361 zfs_ioc_vdev_split);
5362 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5363 zfs_ioc_pool_reguid);
5364
5365 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5366 zfs_ioc_pool_configs, zfs_secpolicy_none);
5367 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5368 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5369 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5370 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5371 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5372 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5373 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5374 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5375
5376 /*
5377 * pool destroy, and export don't log the history as part of
5378 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5379 * does the logging of those commands.
5380 */
5381 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5382 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5383 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5384 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5385
5386 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5387 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5388 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5389 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5390
5391 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5392 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5393 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5394 zfs_ioc_dsobj_to_dsname,
5395 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5396 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5397 zfs_ioc_pool_get_history,
5398 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5399
5400 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5401 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5402
5403 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5404 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5405 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5406 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5407
5408 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5409 zfs_ioc_space_written);
5410 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5411 zfs_ioc_objset_recvd_props);
5412 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5413 zfs_ioc_next_obj);
5414 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5415 zfs_ioc_get_fsacl);
5416 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5417 zfs_ioc_objset_stats);
5418 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5419 zfs_ioc_objset_zplprops);
5420 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5421 zfs_ioc_dataset_list_next);
5422 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5423 zfs_ioc_snapshot_list_next);
5424 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5425 zfs_ioc_send_progress);
5426
5427 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5428 zfs_ioc_diff, zfs_secpolicy_diff);
5429 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5430 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5431 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5432 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5433 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5434 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5435 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5436 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5437 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5438 zfs_ioc_send, zfs_secpolicy_send);
5439
5440 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5441 zfs_secpolicy_none);
5442 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5443 zfs_secpolicy_destroy);
5444 zfs_ioctl_register_dataset_modify(ZFS_IOC_ROLLBACK, zfs_ioc_rollback,
5445 zfs_secpolicy_rollback);
5446 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5447 zfs_secpolicy_rename);
5448 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5449 zfs_secpolicy_recv);
5450 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5451 zfs_secpolicy_promote);
5452 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5453 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5454 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5455 zfs_secpolicy_set_fsacl);
5456
5457 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5458 zfs_secpolicy_share, POOL_CHECK_NONE);
5459 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5460 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5461 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5462 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5463 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5464 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5465 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5466 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5467 }
5468
5469 int
5470 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5471 zfs_ioc_poolcheck_t check)
5472 {
5473 spa_t *spa;
5474 int error;
5475
5476 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5477
5478 if (check & POOL_CHECK_NONE)
5479 return (0);
5480
5481 error = spa_open(name, &spa, FTAG);
5482 if (error == 0) {
5483 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5484 error = SET_ERROR(EAGAIN);
5485 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5486 error = SET_ERROR(EROFS);
5487 spa_close(spa, FTAG);
5488 }
5489 return (error);
5490 }
5491
5492 /*
5493 * Find a free minor number.
5494 */
5495 minor_t
5496 zfsdev_minor_alloc(void)
5497 {
5498 static minor_t last_minor;
5499 minor_t m;
5500
5501 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5502
5503 for (m = last_minor + 1; m != last_minor; m++) {
5504 if (m > ZFSDEV_MAX_MINOR)
5505 m = 1;
5506 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5507 last_minor = m;
5508 return (m);
5509 }
5510 }
5511
5512 return (0);
5513 }
5514
5515 static int
5516 zfs_ctldev_init(dev_t *devp)
5517 {
5518 minor_t minor;
5519 zfs_soft_state_t *zs;
5520
5521 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5522 ASSERT(getminor(*devp) == 0);
5523
5524 minor = zfsdev_minor_alloc();
5525 if (minor == 0)
5526 return (SET_ERROR(ENXIO));
5527
5528 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5529 return (SET_ERROR(EAGAIN));
5530
5531 *devp = makedevice(getemajor(*devp), minor);
5532
5533 zs = ddi_get_soft_state(zfsdev_state, minor);
5534 zs->zss_type = ZSST_CTLDEV;
5535 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5536
5537 return (0);
5538 }
5539
5540 static void
5541 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5542 {
5543 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5544
5545 zfs_onexit_destroy(zo);
5546 ddi_soft_state_free(zfsdev_state, minor);
5547 }
5548
5549 void *
5550 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5551 {
5552 zfs_soft_state_t *zp;
5553
5554 zp = ddi_get_soft_state(zfsdev_state, minor);
5555 if (zp == NULL || zp->zss_type != which)
5556 return (NULL);
5557
5558 return (zp->zss_data);
5559 }
5560
5561 static int
5562 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5563 {
5564 int error = 0;
5565
5566 if (getminor(*devp) != 0)
5567 return (zvol_open(devp, flag, otyp, cr));
5568
5569 /* This is the control device. Allocate a new minor if requested. */
5570 if (flag & FEXCL) {
5571 mutex_enter(&zfsdev_state_lock);
5572 error = zfs_ctldev_init(devp);
5573 mutex_exit(&zfsdev_state_lock);
5574 }
5575
5576 return (error);
5577 }
5578
5579 static int
5580 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5581 {
5582 zfs_onexit_t *zo;
5583 minor_t minor = getminor(dev);
5584
5585 if (minor == 0)
5586 return (0);
5587
5588 mutex_enter(&zfsdev_state_lock);
5589 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5590 if (zo == NULL) {
5591 mutex_exit(&zfsdev_state_lock);
5592 return (zvol_close(dev, flag, otyp, cr));
5593 }
5594 zfs_ctldev_destroy(zo, minor);
5595 mutex_exit(&zfsdev_state_lock);
5596
5597 return (0);
5598 }
5599
5600 static int
5601 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5602 {
5603 zfs_cmd_t *zc;
5604 uint_t vecnum;
5605 int error, rc, len;
5606 minor_t minor = getminor(dev);
5607 const zfs_ioc_vec_t *vec;
5608 char *saved_poolname = NULL;
5609 nvlist_t *innvl = NULL;
5610
5611 if (minor != 0 &&
5612 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5613 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5614
5615 vecnum = cmd - ZFS_IOC_FIRST;
5616 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5617
5618 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5619 return (SET_ERROR(EINVAL));
5620 vec = &zfs_ioc_vec[vecnum];
5621
5622 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5623
5624 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5625 if (error != 0) {
5626 error = SET_ERROR(EFAULT);
5627 goto out;
5628 }
5629
5630 zc->zc_iflags = flag & FKIOCTL;
5631 if (zc->zc_nvlist_src_size != 0) {
5632 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5633 zc->zc_iflags, &innvl);
5634 if (error != 0)
5635 goto out;
5636 }
5637
5638 /*
5639 * Ensure that all pool/dataset names are valid before we pass down to
5640 * the lower layers.
5641 */
5642 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5643 switch (vec->zvec_namecheck) {
5644 case POOL_NAME:
5645 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5646 error = SET_ERROR(EINVAL);
5647 else
5648 error = pool_status_check(zc->zc_name,
5649 vec->zvec_namecheck, vec->zvec_pool_check);
5650 break;
5651
5652 case DATASET_NAME:
5653 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5654 error = SET_ERROR(EINVAL);
5655 else
5656 error = pool_status_check(zc->zc_name,
5657 vec->zvec_namecheck, vec->zvec_pool_check);
5658 break;
5659
5660 case NO_NAME:
5661 break;
5662 }
5663
5664
5665 if (error == 0 && !(flag & FKIOCTL))
5666 error = vec->zvec_secpolicy(zc, innvl, cr);
5667
5668 if (error != 0)
5669 goto out;
5670
5671 /* legacy ioctls can modify zc_name */
5672 len = strcspn(zc->zc_name, "/@") + 1;
5673 saved_poolname = kmem_alloc(len, KM_SLEEP);
5674 (void) strlcpy(saved_poolname, zc->zc_name, len);
5675
5676 if (vec->zvec_func != NULL) {
5677 nvlist_t *outnvl;
5678 int puterror = 0;
5679 spa_t *spa;
5680 nvlist_t *lognv = NULL;
5681
5682 ASSERT(vec->zvec_legacy_func == NULL);
5683
5684 /*
5685 * Add the innvl to the lognv before calling the func,
5686 * in case the func changes the innvl.
5687 */
5688 if (vec->zvec_allow_log) {
5689 lognv = fnvlist_alloc();
5690 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
5691 vec->zvec_name);
5692 if (!nvlist_empty(innvl)) {
5693 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
5694 innvl);
5695 }
5696 }
5697
5698 outnvl = fnvlist_alloc();
5699 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
5700
5701 if (error == 0 && vec->zvec_allow_log &&
5702 spa_open(zc->zc_name, &spa, FTAG) == 0) {
5703 if (!nvlist_empty(outnvl)) {
5704 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
5705 outnvl);
5706 }
5707 (void) spa_history_log_nvl(spa, lognv);
5708 spa_close(spa, FTAG);
5709 }
5710 fnvlist_free(lognv);
5711
5712 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
5713 int smusherror = 0;
5714 if (vec->zvec_smush_outnvlist) {
5715 smusherror = nvlist_smush(outnvl,
5716 zc->zc_nvlist_dst_size);
5717 }
5718 if (smusherror == 0)
5719 puterror = put_nvlist(zc, outnvl);
5720 }
5721
5722 if (puterror != 0)
5723 error = puterror;
5724
5725 nvlist_free(outnvl);
5726 } else {
5727 error = vec->zvec_legacy_func(zc);
5728 }
5729
5730 out:
5731 nvlist_free(innvl);
5732 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5733 if (error == 0 && rc != 0)
5734 error = SET_ERROR(EFAULT);
5735 if (error == 0 && vec->zvec_allow_log) {
5736 char *s = tsd_get(zfs_allow_log_key);
5737 if (s != NULL)
5738 strfree(s);
5739 (void) tsd_set(zfs_allow_log_key, saved_poolname);
5740 } else {
5741 if (saved_poolname != NULL)
5742 strfree(saved_poolname);
5743 }
5744
5745 kmem_free(zc, sizeof (zfs_cmd_t));
5746 return (error);
5747 }
5748
5749 static int
5750 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5751 {
5752 if (cmd != DDI_ATTACH)
5753 return (DDI_FAILURE);
5754
5755 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5756 DDI_PSEUDO, 0) == DDI_FAILURE)
5757 return (DDI_FAILURE);
5758
5759 zfs_dip = dip;
5760
5761 ddi_report_dev(dip);
5762
5763 return (DDI_SUCCESS);
5764 }
5765
5766 static int
5767 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5768 {
5769 if (spa_busy() || zfs_busy() || zvol_busy())
5770 return (DDI_FAILURE);
5771
5772 if (cmd != DDI_DETACH)
5773 return (DDI_FAILURE);
5774
5775 zfs_dip = NULL;
5776
5777 ddi_prop_remove_all(dip);
5778 ddi_remove_minor_node(dip, NULL);
5779
5780 return (DDI_SUCCESS);
5781 }
5782
5783 /*ARGSUSED*/
5784 static int
5785 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5786 {
5787 switch (infocmd) {
5788 case DDI_INFO_DEVT2DEVINFO:
5789 *result = zfs_dip;
5790 return (DDI_SUCCESS);
5791
5792 case DDI_INFO_DEVT2INSTANCE:
5793 *result = (void *)0;
5794 return (DDI_SUCCESS);
5795 }
5796
5797 return (DDI_FAILURE);
5798 }
5799
5800 /*
5801 * OK, so this is a little weird.
5802 *
5803 * /dev/zfs is the control node, i.e. minor 0.
5804 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5805 *
5806 * /dev/zfs has basically nothing to do except serve up ioctls,
5807 * so most of the standard driver entry points are in zvol.c.
5808 */
5809 static struct cb_ops zfs_cb_ops = {
5810 zfsdev_open, /* open */
5811 zfsdev_close, /* close */
5812 zvol_strategy, /* strategy */
5813 nodev, /* print */
5814 zvol_dump, /* dump */
5815 zvol_read, /* read */
5816 zvol_write, /* write */
5817 zfsdev_ioctl, /* ioctl */
5818 nodev, /* devmap */
5819 nodev, /* mmap */
5820 nodev, /* segmap */
5821 nochpoll, /* poll */
5822 ddi_prop_op, /* prop_op */
5823 NULL, /* streamtab */
5824 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
5825 CB_REV, /* version */
5826 nodev, /* async read */
5827 nodev, /* async write */
5828 };
5829
5830 static struct dev_ops zfs_dev_ops = {
5831 DEVO_REV, /* version */
5832 0, /* refcnt */
5833 zfs_info, /* info */
5834 nulldev, /* identify */
5835 nulldev, /* probe */
5836 zfs_attach, /* attach */
5837 zfs_detach, /* detach */
5838 nodev, /* reset */
5839 &zfs_cb_ops, /* driver operations */
5840 NULL, /* no bus operations */
5841 NULL, /* power */
5842 ddi_quiesce_not_needed, /* quiesce */
5843 };
5844
5845 static struct modldrv zfs_modldrv = {
5846 &mod_driverops,
5847 "ZFS storage pool",
5848 &zfs_dev_ops
5849 };
5850
5851 static struct modlinkage modlinkage = {
5852 MODREV_1,
5853 (void *)&zfs_modlfs,
5854 (void *)&zfs_modldrv,
5855 NULL
5856 };
5857
5858 static void
5859 zfs_allow_log_destroy(void *arg)
5860 {
5861 char *poolname = arg;
5862 strfree(poolname);
5863 }
5864
5865 int
5866 _init(void)
5867 {
5868 int error;
5869
5870 spa_init(FREAD | FWRITE);
5871 zfs_init();
5872 zvol_init();
5873 zfs_ioctl_init();
5874
5875 if ((error = mod_install(&modlinkage)) != 0) {
5876 zvol_fini();
5877 zfs_fini();
5878 spa_fini();
5879 return (error);
5880 }
5881
5882 tsd_create(&zfs_fsyncer_key, NULL);
5883 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
5884 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
5885
5886 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
5887 ASSERT(error == 0);
5888 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
5889
5890 return (0);
5891 }
5892
5893 int
5894 _fini(void)
5895 {
5896 int error;
5897
5898 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
5899 return (SET_ERROR(EBUSY));
5900
5901 if ((error = mod_remove(&modlinkage)) != 0)
5902 return (error);
5903
5904 zvol_fini();
5905 zfs_fini();
5906 spa_fini();
5907 if (zfs_nfsshare_inited)
5908 (void) ddi_modclose(nfs_mod);
5909 if (zfs_smbshare_inited)
5910 (void) ddi_modclose(smbsrv_mod);
5911 if (zfs_nfsshare_inited || zfs_smbshare_inited)
5912 (void) ddi_modclose(sharefs_mod);
5913
5914 tsd_destroy(&zfs_fsyncer_key);
5915 ldi_ident_release(zfs_li);
5916 zfs_li = NULL;
5917 mutex_destroy(&zfs_share_lock);
5918
5919 return (error);
5920 }
5921
5922 int
5923 _info(struct modinfo *modinfop)
5924 {
5925 return (mod_info(&modlinkage, modinfop));
5926 }