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) 2014, Joyent, Inc. All rights reserved.
27 * Copyright (c) 2013 by Delphix. All rights reserved.
28 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
29 * Copyright (c) 2013 Steven Hartland. All rights reserved.
30 * Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
31 */
32
33 /*
34 * ZFS ioctls.
35 *
36 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
37 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
38 *
39 * There are two ways that we handle ioctls: the legacy way where almost
40 * all of the logic is in the ioctl callback, and the new way where most
41 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
42 *
43 * Non-legacy ioctls should be registered by calling
44 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
45 * from userland by lzc_ioctl().
46 *
47 * The registration arguments are as follows:
48 *
49 * const char *name
50 * The name of the ioctl. This is used for history logging. If the
51 * ioctl returns successfully (the callback returns 0), and allow_log
52 * is true, then a history log entry will be recorded with the input &
53 * output nvlists. The log entry can be printed with "zpool history -i".
54 *
55 * zfs_ioc_t ioc
56 * The ioctl request number, which userland will pass to ioctl(2).
57 * The ioctl numbers can change from release to release, because
58 * the caller (libzfs) must be matched to the kernel.
59 *
60 * zfs_secpolicy_func_t *secpolicy
61 * This function will be called before the zfs_ioc_func_t, to
62 * determine if this operation is permitted. It should return EPERM
63 * on failure, and 0 on success. Checks include determining if the
64 * dataset is visible in this zone, and if the user has either all
65 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
66 * to do this operation on this dataset with "zfs allow".
67 *
68 * zfs_ioc_namecheck_t namecheck
69 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
70 * name, a dataset name, or nothing. If the name is not well-formed,
71 * the ioctl will fail and the callback will not be called.
72 * Therefore, the callback can assume that the name is well-formed
73 * (e.g. is null-terminated, doesn't have more than one '@' character,
74 * doesn't have invalid characters).
75 *
76 * zfs_ioc_poolcheck_t pool_check
77 * This specifies requirements on the pool state. If the pool does
78 * not meet them (is suspended or is readonly), the ioctl will fail
79 * and the callback will not be called. If any checks are specified
80 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
81 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
82 * POOL_CHECK_READONLY).
83 *
84 * boolean_t smush_outnvlist
85 * If smush_outnvlist is true, then the output is presumed to be a
86 * list of errors, and it will be "smushed" down to fit into the
87 * caller's buffer, by removing some entries and replacing them with a
88 * single "N_MORE_ERRORS" entry indicating how many were removed. See
89 * nvlist_smush() for details. If smush_outnvlist is false, and the
90 * outnvlist does not fit into the userland-provided buffer, then the
91 * ioctl will fail with ENOMEM.
92 *
93 * zfs_ioc_func_t *func
94 * The callback function that will perform the operation.
95 *
96 * The callback should return 0 on success, or an error number on
97 * failure. If the function fails, the userland ioctl will return -1,
98 * and errno will be set to the callback's return value. The callback
99 * will be called with the following arguments:
100 *
101 * const char *name
102 * The name of the pool or dataset to operate on, from
103 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
104 * expected type (pool, dataset, or none).
105 *
106 * nvlist_t *innvl
107 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
108 * NULL if no input nvlist was provided. Changes to this nvlist are
109 * ignored. If the input nvlist could not be deserialized, the
110 * ioctl will fail and the callback will not be called.
111 *
112 * nvlist_t *outnvl
113 * The output nvlist, initially empty. The callback can fill it in,
114 * and it will be returned to userland by serializing it into
115 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
116 * fails (e.g. because the caller didn't supply a large enough
117 * buffer), then the overall ioctl will fail. See the
118 * 'smush_nvlist' argument above for additional behaviors.
119 *
120 * There are two typical uses of the output nvlist:
121 * - To return state, e.g. property values. In this case,
122 * smush_outnvlist should be false. If the buffer was not large
123 * enough, the caller will reallocate a larger buffer and try
124 * the ioctl again.
125 *
126 * - To return multiple errors from an ioctl which makes on-disk
127 * changes. In this case, smush_outnvlist should be true.
128 * Ioctls which make on-disk modifications should generally not
129 * use the outnvl if they succeed, because the caller can not
130 * distinguish between the operation failing, and
131 * deserialization failing.
132 */
133
134 #include <sys/types.h>
135 #include <sys/param.h>
136 #include <sys/errno.h>
137 #include <sys/uio.h>
138 #include <sys/buf.h>
139 #include <sys/modctl.h>
140 #include <sys/open.h>
141 #include <sys/file.h>
142 #include <sys/kmem.h>
143 #include <sys/conf.h>
144 #include <sys/cmn_err.h>
145 #include <sys/stat.h>
146 #include <sys/zfs_ioctl.h>
147 #include <sys/zfs_vfsops.h>
148 #include <sys/zfs_znode.h>
149 #include <sys/zap.h>
150 #include <sys/spa.h>
151 #include <sys/spa_impl.h>
152 #include <sys/vdev.h>
153 #include <sys/priv_impl.h>
154 #include <sys/dmu.h>
155 #include <sys/dsl_dir.h>
156 #include <sys/dsl_dataset.h>
157 #include <sys/dsl_prop.h>
158 #include <sys/dsl_deleg.h>
159 #include <sys/dmu_objset.h>
160 #include <sys/dmu_impl.h>
161 #include <sys/dmu_tx.h>
162 #include <sys/ddi.h>
163 #include <sys/sunddi.h>
164 #include <sys/sunldi.h>
165 #include <sys/policy.h>
166 #include <sys/zone.h>
167 #include <sys/nvpair.h>
168 #include <sys/pathname.h>
169 #include <sys/mount.h>
170 #include <sys/sdt.h>
171 #include <sys/fs/zfs.h>
172 #include <sys/zfs_ctldir.h>
173 #include <sys/zfs_dir.h>
174 #include <sys/zfs_onexit.h>
175 #include <sys/zvol.h>
176 #include <sys/dsl_scan.h>
177 #include <sharefs/share.h>
178 #include <sys/dmu_objset.h>
179 #include <sys/dmu_send.h>
180 #include <sys/dsl_destroy.h>
181 #include <sys/dsl_bookmark.h>
182 #include <sys/dsl_userhold.h>
183 #include <sys/zfeature.h>
184
185 #include "zfs_namecheck.h"
186 #include "zfs_prop.h"
187 #include "zfs_deleg.h"
188 #include "zfs_comutil.h"
189
190 extern struct modlfs zfs_modlfs;
191
192 extern void zfs_init(void);
193 extern void zfs_fini(void);
194
195 ldi_ident_t zfs_li = NULL;
196 dev_info_t *zfs_dip;
197
198 uint_t zfs_fsyncer_key;
199 extern uint_t rrw_tsd_key;
200 static uint_t zfs_allow_log_key;
201
202 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
203 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
204 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
205
206 typedef enum {
207 NO_NAME,
208 POOL_NAME,
209 DATASET_NAME
210 } zfs_ioc_namecheck_t;
211
212 typedef enum {
213 POOL_CHECK_NONE = 1 << 0,
214 POOL_CHECK_SUSPENDED = 1 << 1,
215 POOL_CHECK_READONLY = 1 << 2,
216 } zfs_ioc_poolcheck_t;
217
218 typedef struct zfs_ioc_vec {
219 zfs_ioc_legacy_func_t *zvec_legacy_func;
220 zfs_ioc_func_t *zvec_func;
221 zfs_secpolicy_func_t *zvec_secpolicy;
222 zfs_ioc_namecheck_t zvec_namecheck;
223 boolean_t zvec_allow_log;
224 zfs_ioc_poolcheck_t zvec_pool_check;
225 boolean_t zvec_smush_outnvlist;
226 const char *zvec_name;
227 } zfs_ioc_vec_t;
228
229 /* This array is indexed by zfs_userquota_prop_t */
230 static const char *userquota_perms[] = {
231 ZFS_DELEG_PERM_USERUSED,
232 ZFS_DELEG_PERM_USERQUOTA,
233 ZFS_DELEG_PERM_GROUPUSED,
234 ZFS_DELEG_PERM_GROUPQUOTA,
235 };
236
237 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
238 static int zfs_check_settable(const char *name, nvpair_t *property,
239 cred_t *cr);
240 static int zfs_check_clearable(char *dataset, nvlist_t *props,
241 nvlist_t **errors);
242 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
243 boolean_t *);
244 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
245 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
246
247 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature);
248
249 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
250 void
251 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
252 {
253 const char *newfile;
254 char buf[512];
255 va_list adx;
256
257 /*
258 * Get rid of annoying "../common/" prefix to filename.
259 */
260 newfile = strrchr(file, '/');
261 if (newfile != NULL) {
262 newfile = newfile + 1; /* Get rid of leading / */
263 } else {
264 newfile = file;
265 }
266
267 va_start(adx, fmt);
268 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
269 va_end(adx);
270
271 /*
272 * To get this data, use the zfs-dprintf probe as so:
273 * dtrace -q -n 'zfs-dprintf \
274 * /stringof(arg0) == "dbuf.c"/ \
275 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
276 * arg0 = file name
277 * arg1 = function name
278 * arg2 = line number
279 * arg3 = message
280 */
281 DTRACE_PROBE4(zfs__dprintf,
282 char *, newfile, char *, func, int, line, char *, buf);
283 }
284
285 static void
286 history_str_free(char *buf)
287 {
288 kmem_free(buf, HIS_MAX_RECORD_LEN);
289 }
290
291 static char *
292 history_str_get(zfs_cmd_t *zc)
293 {
294 char *buf;
295
296 if (zc->zc_history == NULL)
297 return (NULL);
298
299 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
300 if (copyinstr((void *)(uintptr_t)zc->zc_history,
301 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
302 history_str_free(buf);
303 return (NULL);
304 }
305
306 buf[HIS_MAX_RECORD_LEN -1] = '\0';
307
308 return (buf);
309 }
310
311 /*
312 * Check to see if the named dataset is currently defined as bootable
313 */
314 static boolean_t
315 zfs_is_bootfs(const char *name)
316 {
317 objset_t *os;
318
319 if (dmu_objset_hold(name, FTAG, &os) == 0) {
320 boolean_t ret;
321 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
322 dmu_objset_rele(os, FTAG);
323 return (ret);
324 }
325 return (B_FALSE);
326 }
327
328 /*
329 * Return non-zero if the spa version is less than requested version.
330 */
331 static int
332 zfs_earlier_version(const char *name, int version)
333 {
334 spa_t *spa;
335
336 if (spa_open(name, &spa, FTAG) == 0) {
337 if (spa_version(spa) < version) {
338 spa_close(spa, FTAG);
339 return (1);
340 }
341 spa_close(spa, FTAG);
342 }
343 return (0);
344 }
345
346 /*
347 * Return TRUE if the ZPL version is less than requested version.
348 */
349 static boolean_t
350 zpl_earlier_version(const char *name, int version)
351 {
352 objset_t *os;
353 boolean_t rc = B_TRUE;
354
355 if (dmu_objset_hold(name, FTAG, &os) == 0) {
356 uint64_t zplversion;
357
358 if (dmu_objset_type(os) != DMU_OST_ZFS) {
359 dmu_objset_rele(os, FTAG);
360 return (B_TRUE);
361 }
362 /* XXX reading from non-owned objset */
363 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
364 rc = zplversion < version;
365 dmu_objset_rele(os, FTAG);
366 }
367 return (rc);
368 }
369
370 static void
371 zfs_log_history(zfs_cmd_t *zc)
372 {
373 spa_t *spa;
374 char *buf;
375
376 if ((buf = history_str_get(zc)) == NULL)
377 return;
378
379 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
380 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
381 (void) spa_history_log(spa, buf);
382 spa_close(spa, FTAG);
383 }
384 history_str_free(buf);
385 }
386
387 /*
388 * Policy for top-level read operations (list pools). Requires no privileges,
389 * and can be used in the local zone, as there is no associated dataset.
390 */
391 /* ARGSUSED */
392 static int
393 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
394 {
395 return (0);
396 }
397
398 /*
399 * Policy for dataset read operations (list children, get statistics). Requires
400 * no privileges, but must be visible in the local zone.
401 */
402 /* ARGSUSED */
403 static int
404 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
405 {
406 if (INGLOBALZONE(curproc) ||
407 zone_dataset_visible(zc->zc_name, NULL))
408 return (0);
409
410 return (SET_ERROR(ENOENT));
411 }
412
413 static int
414 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
415 {
416 int writable = 1;
417
418 /*
419 * The dataset must be visible by this zone -- check this first
420 * so they don't see EPERM on something they shouldn't know about.
421 */
422 if (!INGLOBALZONE(curproc) &&
423 !zone_dataset_visible(dataset, &writable))
424 return (SET_ERROR(ENOENT));
425
426 if (INGLOBALZONE(curproc)) {
427 /*
428 * If the fs is zoned, only root can access it from the
429 * global zone.
430 */
431 if (secpolicy_zfs(cr) && zoned)
432 return (SET_ERROR(EPERM));
433 } else {
434 /*
435 * If we are in a local zone, the 'zoned' property must be set.
436 */
437 if (!zoned)
438 return (SET_ERROR(EPERM));
439
440 /* must be writable by this zone */
441 if (!writable)
442 return (SET_ERROR(EPERM));
443 }
444 return (0);
445 }
446
447 static int
448 zfs_dozonecheck(const char *dataset, cred_t *cr)
449 {
450 uint64_t zoned;
451
452 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
453 return (SET_ERROR(ENOENT));
454
455 return (zfs_dozonecheck_impl(dataset, zoned, cr));
456 }
457
458 static int
459 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
460 {
461 uint64_t zoned;
462
463 if (dsl_prop_get_int_ds(ds, "zoned", &zoned))
464 return (SET_ERROR(ENOENT));
465
466 return (zfs_dozonecheck_impl(dataset, zoned, cr));
467 }
468
469 static int
470 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
471 const char *perm, cred_t *cr)
472 {
473 int error;
474
475 error = zfs_dozonecheck_ds(name, ds, cr);
476 if (error == 0) {
477 error = secpolicy_zfs(cr);
478 if (error != 0)
479 error = dsl_deleg_access_impl(ds, perm, cr);
480 }
481 return (error);
482 }
483
484 static int
485 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
486 {
487 int error;
488 dsl_dataset_t *ds;
489 dsl_pool_t *dp;
490
491 error = dsl_pool_hold(name, FTAG, &dp);
492 if (error != 0)
493 return (error);
494
495 error = dsl_dataset_hold(dp, name, FTAG, &ds);
496 if (error != 0) {
497 dsl_pool_rele(dp, FTAG);
498 return (error);
499 }
500
501 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr);
502
503 dsl_dataset_rele(ds, FTAG);
504 dsl_pool_rele(dp, FTAG);
505 return (error);
506 }
507
508 /*
509 * Policy for setting the security label property.
510 *
511 * Returns 0 for success, non-zero for access and other errors.
512 */
513 static int
514 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
515 {
516 char ds_hexsl[MAXNAMELEN];
517 bslabel_t ds_sl, new_sl;
518 boolean_t new_default = FALSE;
519 uint64_t zoned;
520 int needed_priv = -1;
521 int error;
522
523 /* First get the existing dataset label. */
524 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
525 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
526 if (error != 0)
527 return (SET_ERROR(EPERM));
528
529 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
530 new_default = TRUE;
531
532 /* The label must be translatable */
533 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
534 return (SET_ERROR(EINVAL));
535
536 /*
537 * In a non-global zone, disallow attempts to set a label that
538 * doesn't match that of the zone; otherwise no other checks
539 * are needed.
540 */
541 if (!INGLOBALZONE(curproc)) {
542 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
543 return (SET_ERROR(EPERM));
544 return (0);
545 }
546
547 /*
548 * For global-zone datasets (i.e., those whose zoned property is
549 * "off", verify that the specified new label is valid for the
550 * global zone.
551 */
552 if (dsl_prop_get_integer(name,
553 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
554 return (SET_ERROR(EPERM));
555 if (!zoned) {
556 if (zfs_check_global_label(name, strval) != 0)
557 return (SET_ERROR(EPERM));
558 }
559
560 /*
561 * If the existing dataset label is nondefault, check if the
562 * dataset is mounted (label cannot be changed while mounted).
563 * Get the zfsvfs; if there isn't one, then the dataset isn't
564 * mounted (or isn't a dataset, doesn't exist, ...).
565 */
566 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
567 objset_t *os;
568 static char *setsl_tag = "setsl_tag";
569
570 /*
571 * Try to own the dataset; abort if there is any error,
572 * (e.g., already mounted, in use, or other error).
573 */
574 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
575 setsl_tag, &os);
576 if (error != 0)
577 return (SET_ERROR(EPERM));
578
579 dmu_objset_disown(os, setsl_tag);
580
581 if (new_default) {
582 needed_priv = PRIV_FILE_DOWNGRADE_SL;
583 goto out_check;
584 }
585
586 if (hexstr_to_label(strval, &new_sl) != 0)
587 return (SET_ERROR(EPERM));
588
589 if (blstrictdom(&ds_sl, &new_sl))
590 needed_priv = PRIV_FILE_DOWNGRADE_SL;
591 else if (blstrictdom(&new_sl, &ds_sl))
592 needed_priv = PRIV_FILE_UPGRADE_SL;
593 } else {
594 /* dataset currently has a default label */
595 if (!new_default)
596 needed_priv = PRIV_FILE_UPGRADE_SL;
597 }
598
599 out_check:
600 if (needed_priv != -1)
601 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
602 return (0);
603 }
604
605 static int
606 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
607 cred_t *cr)
608 {
609 char *strval;
610
611 /*
612 * Check permissions for special properties.
613 */
614 switch (prop) {
615 case ZFS_PROP_ZONED:
616 /*
617 * Disallow setting of 'zoned' from within a local zone.
618 */
619 if (!INGLOBALZONE(curproc))
620 return (SET_ERROR(EPERM));
621 break;
622
623 case ZFS_PROP_QUOTA:
624 case ZFS_PROP_FILESYSTEM_LIMIT:
625 case ZFS_PROP_SNAPSHOT_LIMIT:
626 if (!INGLOBALZONE(curproc)) {
627 uint64_t zoned;
628 char setpoint[MAXNAMELEN];
629 /*
630 * Unprivileged users are allowed to modify the
631 * limit on things *under* (ie. contained by)
632 * the thing they own.
633 */
634 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
635 setpoint))
636 return (SET_ERROR(EPERM));
637 if (!zoned || strlen(dsname) <= strlen(setpoint))
638 return (SET_ERROR(EPERM));
639 }
640 break;
641
642 case ZFS_PROP_MLSLABEL:
643 if (!is_system_labeled())
644 return (SET_ERROR(EPERM));
645
646 if (nvpair_value_string(propval, &strval) == 0) {
647 int err;
648
649 err = zfs_set_slabel_policy(dsname, strval, CRED());
650 if (err != 0)
651 return (err);
652 }
653 break;
654 }
655
656 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
657 }
658
659 /* ARGSUSED */
660 static int
661 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
662 {
663 int error;
664
665 error = zfs_dozonecheck(zc->zc_name, cr);
666 if (error != 0)
667 return (error);
668
669 /*
670 * permission to set permissions will be evaluated later in
671 * dsl_deleg_can_allow()
672 */
673 return (0);
674 }
675
676 /* ARGSUSED */
677 static int
678 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
679 {
680 return (zfs_secpolicy_write_perms(zc->zc_name,
681 ZFS_DELEG_PERM_ROLLBACK, cr));
682 }
683
684 /* ARGSUSED */
685 static int
686 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
687 {
688 dsl_pool_t *dp;
689 dsl_dataset_t *ds;
690 char *cp;
691 int error;
692
693 /*
694 * Generate the current snapshot name from the given objsetid, then
695 * use that name for the secpolicy/zone checks.
696 */
697 cp = strchr(zc->zc_name, '@');
698 if (cp == NULL)
699 return (SET_ERROR(EINVAL));
700 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
701 if (error != 0)
702 return (error);
703
704 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
705 if (error != 0) {
706 dsl_pool_rele(dp, FTAG);
707 return (error);
708 }
709
710 dsl_dataset_name(ds, zc->zc_name);
711
712 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
713 ZFS_DELEG_PERM_SEND, cr);
714 dsl_dataset_rele(ds, FTAG);
715 dsl_pool_rele(dp, FTAG);
716
717 return (error);
718 }
719
720 /* ARGSUSED */
721 static int
722 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
723 {
724 return (zfs_secpolicy_write_perms(zc->zc_name,
725 ZFS_DELEG_PERM_SEND, cr));
726 }
727
728 /* ARGSUSED */
729 static int
730 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
731 {
732 vnode_t *vp;
733 int error;
734
735 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
736 NO_FOLLOW, NULL, &vp)) != 0)
737 return (error);
738
739 /* Now make sure mntpnt and dataset are ZFS */
740
741 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
742 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
743 zc->zc_name) != 0)) {
744 VN_RELE(vp);
745 return (SET_ERROR(EPERM));
746 }
747
748 VN_RELE(vp);
749 return (dsl_deleg_access(zc->zc_name,
750 ZFS_DELEG_PERM_SHARE, cr));
751 }
752
753 int
754 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
755 {
756 if (!INGLOBALZONE(curproc))
757 return (SET_ERROR(EPERM));
758
759 if (secpolicy_nfs(cr) == 0) {
760 return (0);
761 } else {
762 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
763 }
764 }
765
766 int
767 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
768 {
769 if (!INGLOBALZONE(curproc))
770 return (SET_ERROR(EPERM));
771
772 if (secpolicy_smb(cr) == 0) {
773 return (0);
774 } else {
775 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
776 }
777 }
778
779 static int
780 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
781 {
782 char *cp;
783
784 /*
785 * Remove the @bla or /bla from the end of the name to get the parent.
786 */
787 (void) strncpy(parent, datasetname, parentsize);
788 cp = strrchr(parent, '@');
789 if (cp != NULL) {
790 cp[0] = '\0';
791 } else {
792 cp = strrchr(parent, '/');
793 if (cp == NULL)
794 return (SET_ERROR(ENOENT));
795 cp[0] = '\0';
796 }
797
798 return (0);
799 }
800
801 int
802 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
803 {
804 int error;
805
806 if ((error = zfs_secpolicy_write_perms(name,
807 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
808 return (error);
809
810 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
811 }
812
813 /* ARGSUSED */
814 static int
815 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
816 {
817 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
818 }
819
820 /*
821 * Destroying snapshots with delegated permissions requires
822 * descendant mount and destroy permissions.
823 */
824 /* ARGSUSED */
825 static int
826 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
827 {
828 nvlist_t *snaps;
829 nvpair_t *pair, *nextpair;
830 int error = 0;
831
832 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
833 return (SET_ERROR(EINVAL));
834 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
835 pair = nextpair) {
836 nextpair = nvlist_next_nvpair(snaps, pair);
837 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr);
838 if (error == ENOENT) {
839 /*
840 * Ignore any snapshots that don't exist (we consider
841 * them "already destroyed"). Remove the name from the
842 * nvl here in case the snapshot is created between
843 * now and when we try to destroy it (in which case
844 * we don't want to destroy it since we haven't
845 * checked for permission).
846 */
847 fnvlist_remove_nvpair(snaps, pair);
848 error = 0;
849 }
850 if (error != 0)
851 break;
852 }
853
854 return (error);
855 }
856
857 int
858 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
859 {
860 char parentname[MAXNAMELEN];
861 int error;
862
863 if ((error = zfs_secpolicy_write_perms(from,
864 ZFS_DELEG_PERM_RENAME, cr)) != 0)
865 return (error);
866
867 if ((error = zfs_secpolicy_write_perms(from,
868 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
869 return (error);
870
871 if ((error = zfs_get_parent(to, parentname,
872 sizeof (parentname))) != 0)
873 return (error);
874
875 if ((error = zfs_secpolicy_write_perms(parentname,
876 ZFS_DELEG_PERM_CREATE, cr)) != 0)
877 return (error);
878
879 if ((error = zfs_secpolicy_write_perms(parentname,
880 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
881 return (error);
882
883 return (error);
884 }
885
886 /* ARGSUSED */
887 static int
888 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
889 {
890 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
891 }
892
893 /* ARGSUSED */
894 static int
895 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
896 {
897 dsl_pool_t *dp;
898 dsl_dataset_t *clone;
899 int error;
900
901 error = zfs_secpolicy_write_perms(zc->zc_name,
902 ZFS_DELEG_PERM_PROMOTE, cr);
903 if (error != 0)
904 return (error);
905
906 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
907 if (error != 0)
908 return (error);
909
910 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
911
912 if (error == 0) {
913 char parentname[MAXNAMELEN];
914 dsl_dataset_t *origin = NULL;
915 dsl_dir_t *dd;
916 dd = clone->ds_dir;
917
918 error = dsl_dataset_hold_obj(dd->dd_pool,
919 dd->dd_phys->dd_origin_obj, FTAG, &origin);
920 if (error != 0) {
921 dsl_dataset_rele(clone, FTAG);
922 dsl_pool_rele(dp, FTAG);
923 return (error);
924 }
925
926 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
927 ZFS_DELEG_PERM_MOUNT, cr);
928
929 dsl_dataset_name(origin, parentname);
930 if (error == 0) {
931 error = zfs_secpolicy_write_perms_ds(parentname, origin,
932 ZFS_DELEG_PERM_PROMOTE, cr);
933 }
934 dsl_dataset_rele(clone, FTAG);
935 dsl_dataset_rele(origin, FTAG);
936 }
937 dsl_pool_rele(dp, FTAG);
938 return (error);
939 }
940
941 /* ARGSUSED */
942 static int
943 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
944 {
945 int error;
946
947 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
948 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
949 return (error);
950
951 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
952 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
953 return (error);
954
955 return (zfs_secpolicy_write_perms(zc->zc_name,
956 ZFS_DELEG_PERM_CREATE, cr));
957 }
958
959 int
960 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
961 {
962 return (zfs_secpolicy_write_perms(name,
963 ZFS_DELEG_PERM_SNAPSHOT, cr));
964 }
965
966 /*
967 * Check for permission to create each snapshot in the nvlist.
968 */
969 /* ARGSUSED */
970 static int
971 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
972 {
973 nvlist_t *snaps;
974 int error = 0;
975 nvpair_t *pair;
976
977 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
978 return (SET_ERROR(EINVAL));
979 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
980 pair = nvlist_next_nvpair(snaps, pair)) {
981 char *name = nvpair_name(pair);
982 char *atp = strchr(name, '@');
983
984 if (atp == NULL) {
985 error = SET_ERROR(EINVAL);
986 break;
987 }
988 *atp = '\0';
989 error = zfs_secpolicy_snapshot_perms(name, cr);
990 *atp = '@';
991 if (error != 0)
992 break;
993 }
994 return (error);
995 }
996
997 /*
998 * Check for permission to create each snapshot in the nvlist.
999 */
1000 /* ARGSUSED */
1001 static int
1002 zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1003 {
1004 int error = 0;
1005
1006 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
1007 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
1008 char *name = nvpair_name(pair);
1009 char *hashp = strchr(name, '#');
1010
1011 if (hashp == NULL) {
1012 error = SET_ERROR(EINVAL);
1013 break;
1014 }
1015 *hashp = '\0';
1016 error = zfs_secpolicy_write_perms(name,
1017 ZFS_DELEG_PERM_BOOKMARK, cr);
1018 *hashp = '#';
1019 if (error != 0)
1020 break;
1021 }
1022 return (error);
1023 }
1024
1025 /* ARGSUSED */
1026 static int
1027 zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1028 {
1029 nvpair_t *pair, *nextpair;
1030 int error = 0;
1031
1032 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1033 pair = nextpair) {
1034 char *name = nvpair_name(pair);
1035 char *hashp = strchr(name, '#');
1036 nextpair = nvlist_next_nvpair(innvl, pair);
1037
1038 if (hashp == NULL) {
1039 error = SET_ERROR(EINVAL);
1040 break;
1041 }
1042
1043 *hashp = '\0';
1044 error = zfs_secpolicy_write_perms(name,
1045 ZFS_DELEG_PERM_DESTROY, cr);
1046 *hashp = '#';
1047 if (error == ENOENT) {
1048 /*
1049 * Ignore any filesystems that don't exist (we consider
1050 * their bookmarks "already destroyed"). Remove
1051 * the name from the nvl here in case the filesystem
1052 * is created between now and when we try to destroy
1053 * the bookmark (in which case we don't want to
1054 * destroy it since we haven't checked for permission).
1055 */
1056 fnvlist_remove_nvpair(innvl, pair);
1057 error = 0;
1058 }
1059 if (error != 0)
1060 break;
1061 }
1062
1063 return (error);
1064 }
1065
1066 /* ARGSUSED */
1067 static int
1068 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1069 {
1070 /*
1071 * Even root must have a proper TSD so that we know what pool
1072 * to log to.
1073 */
1074 if (tsd_get(zfs_allow_log_key) == NULL)
1075 return (SET_ERROR(EPERM));
1076 return (0);
1077 }
1078
1079 static int
1080 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1081 {
1082 char parentname[MAXNAMELEN];
1083 int error;
1084 char *origin;
1085
1086 if ((error = zfs_get_parent(zc->zc_name, parentname,
1087 sizeof (parentname))) != 0)
1088 return (error);
1089
1090 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1091 (error = zfs_secpolicy_write_perms(origin,
1092 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1093 return (error);
1094
1095 if ((error = zfs_secpolicy_write_perms(parentname,
1096 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1097 return (error);
1098
1099 return (zfs_secpolicy_write_perms(parentname,
1100 ZFS_DELEG_PERM_MOUNT, cr));
1101 }
1102
1103 /*
1104 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1105 * SYS_CONFIG privilege, which is not available in a local zone.
1106 */
1107 /* ARGSUSED */
1108 static int
1109 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1110 {
1111 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1112 return (SET_ERROR(EPERM));
1113
1114 return (0);
1115 }
1116
1117 /*
1118 * Policy for object to name lookups.
1119 */
1120 /* ARGSUSED */
1121 static int
1122 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1123 {
1124 int error;
1125
1126 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1127 return (0);
1128
1129 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1130 return (error);
1131 }
1132
1133 /*
1134 * Policy for fault injection. Requires all privileges.
1135 */
1136 /* ARGSUSED */
1137 static int
1138 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1139 {
1140 return (secpolicy_zinject(cr));
1141 }
1142
1143 /* ARGSUSED */
1144 static int
1145 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1146 {
1147 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1148
1149 if (prop == ZPROP_INVAL) {
1150 if (!zfs_prop_user(zc->zc_value))
1151 return (SET_ERROR(EINVAL));
1152 return (zfs_secpolicy_write_perms(zc->zc_name,
1153 ZFS_DELEG_PERM_USERPROP, cr));
1154 } else {
1155 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1156 NULL, cr));
1157 }
1158 }
1159
1160 static int
1161 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1162 {
1163 int err = zfs_secpolicy_read(zc, innvl, cr);
1164 if (err)
1165 return (err);
1166
1167 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1168 return (SET_ERROR(EINVAL));
1169
1170 if (zc->zc_value[0] == 0) {
1171 /*
1172 * They are asking about a posix uid/gid. If it's
1173 * themself, allow it.
1174 */
1175 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1176 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1177 if (zc->zc_guid == crgetuid(cr))
1178 return (0);
1179 } else {
1180 if (groupmember(zc->zc_guid, cr))
1181 return (0);
1182 }
1183 }
1184
1185 return (zfs_secpolicy_write_perms(zc->zc_name,
1186 userquota_perms[zc->zc_objset_type], cr));
1187 }
1188
1189 static int
1190 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1191 {
1192 int err = zfs_secpolicy_read(zc, innvl, cr);
1193 if (err)
1194 return (err);
1195
1196 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1197 return (SET_ERROR(EINVAL));
1198
1199 return (zfs_secpolicy_write_perms(zc->zc_name,
1200 userquota_perms[zc->zc_objset_type], cr));
1201 }
1202
1203 /* ARGSUSED */
1204 static int
1205 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1206 {
1207 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1208 NULL, cr));
1209 }
1210
1211 /* ARGSUSED */
1212 static int
1213 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1214 {
1215 nvpair_t *pair;
1216 nvlist_t *holds;
1217 int error;
1218
1219 error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1220 if (error != 0)
1221 return (SET_ERROR(EINVAL));
1222
1223 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1224 pair = nvlist_next_nvpair(holds, pair)) {
1225 char fsname[MAXNAMELEN];
1226 error = dmu_fsname(nvpair_name(pair), fsname);
1227 if (error != 0)
1228 return (error);
1229 error = zfs_secpolicy_write_perms(fsname,
1230 ZFS_DELEG_PERM_HOLD, cr);
1231 if (error != 0)
1232 return (error);
1233 }
1234 return (0);
1235 }
1236
1237 /* ARGSUSED */
1238 static int
1239 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1240 {
1241 nvpair_t *pair;
1242 int error;
1243
1244 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1245 pair = nvlist_next_nvpair(innvl, pair)) {
1246 char fsname[MAXNAMELEN];
1247 error = dmu_fsname(nvpair_name(pair), fsname);
1248 if (error != 0)
1249 return (error);
1250 error = zfs_secpolicy_write_perms(fsname,
1251 ZFS_DELEG_PERM_RELEASE, cr);
1252 if (error != 0)
1253 return (error);
1254 }
1255 return (0);
1256 }
1257
1258 /*
1259 * Policy for allowing temporary snapshots to be taken or released
1260 */
1261 static int
1262 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1263 {
1264 /*
1265 * A temporary snapshot is the same as a snapshot,
1266 * hold, destroy and release all rolled into one.
1267 * Delegated diff alone is sufficient that we allow this.
1268 */
1269 int error;
1270
1271 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1272 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1273 return (0);
1274
1275 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1276 if (error == 0)
1277 error = zfs_secpolicy_hold(zc, innvl, cr);
1278 if (error == 0)
1279 error = zfs_secpolicy_release(zc, innvl, cr);
1280 if (error == 0)
1281 error = zfs_secpolicy_destroy(zc, innvl, cr);
1282 return (error);
1283 }
1284
1285 /*
1286 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1287 */
1288 static int
1289 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1290 {
1291 char *packed;
1292 int error;
1293 nvlist_t *list = NULL;
1294
1295 /*
1296 * Read in and unpack the user-supplied nvlist.
1297 */
1298 if (size == 0)
1299 return (SET_ERROR(EINVAL));
1300
1301 packed = kmem_alloc(size, KM_SLEEP);
1302
1303 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1304 iflag)) != 0) {
1305 kmem_free(packed, size);
1306 return (error);
1307 }
1308
1309 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1310 kmem_free(packed, size);
1311 return (error);
1312 }
1313
1314 kmem_free(packed, size);
1315
1316 *nvp = list;
1317 return (0);
1318 }
1319
1320 /*
1321 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1322 * Entries will be removed from the end of the nvlist, and one int32 entry
1323 * named "N_MORE_ERRORS" will be added indicating how many entries were
1324 * removed.
1325 */
1326 static int
1327 nvlist_smush(nvlist_t *errors, size_t max)
1328 {
1329 size_t size;
1330
1331 size = fnvlist_size(errors);
1332
1333 if (size > max) {
1334 nvpair_t *more_errors;
1335 int n = 0;
1336
1337 if (max < 1024)
1338 return (SET_ERROR(ENOMEM));
1339
1340 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1341 more_errors = nvlist_prev_nvpair(errors, NULL);
1342
1343 do {
1344 nvpair_t *pair = nvlist_prev_nvpair(errors,
1345 more_errors);
1346 fnvlist_remove_nvpair(errors, pair);
1347 n++;
1348 size = fnvlist_size(errors);
1349 } while (size > max);
1350
1351 fnvlist_remove_nvpair(errors, more_errors);
1352 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1353 ASSERT3U(fnvlist_size(errors), <=, max);
1354 }
1355
1356 return (0);
1357 }
1358
1359 static int
1360 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1361 {
1362 char *packed = NULL;
1363 int error = 0;
1364 size_t size;
1365
1366 size = fnvlist_size(nvl);
1367
1368 if (size > zc->zc_nvlist_dst_size) {
1369 error = SET_ERROR(ENOMEM);
1370 } else {
1371 packed = fnvlist_pack(nvl, &size);
1372 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1373 size, zc->zc_iflags) != 0)
1374 error = SET_ERROR(EFAULT);
1375 fnvlist_pack_free(packed, size);
1376 }
1377
1378 zc->zc_nvlist_dst_size = size;
1379 zc->zc_nvlist_dst_filled = B_TRUE;
1380 return (error);
1381 }
1382
1383 static int
1384 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1385 {
1386 objset_t *os;
1387 int error;
1388
1389 error = dmu_objset_hold(dsname, FTAG, &os);
1390 if (error != 0)
1391 return (error);
1392 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1393 dmu_objset_rele(os, FTAG);
1394 return (SET_ERROR(EINVAL));
1395 }
1396
1397 mutex_enter(&os->os_user_ptr_lock);
1398 *zfvp = dmu_objset_get_user(os);
1399 if (*zfvp) {
1400 VFS_HOLD((*zfvp)->z_vfs);
1401 } else {
1402 error = SET_ERROR(ESRCH);
1403 }
1404 mutex_exit(&os->os_user_ptr_lock);
1405 dmu_objset_rele(os, FTAG);
1406 return (error);
1407 }
1408
1409 /*
1410 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1411 * case its z_vfs will be NULL, and it will be opened as the owner.
1412 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1413 * which prevents all vnode ops from running.
1414 */
1415 static int
1416 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1417 {
1418 int error = 0;
1419
1420 if (getzfsvfs(name, zfvp) != 0)
1421 error = zfsvfs_create(name, zfvp);
1422 if (error == 0) {
1423 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1424 RW_READER, tag);
1425 if ((*zfvp)->z_unmounted) {
1426 /*
1427 * XXX we could probably try again, since the unmounting
1428 * thread should be just about to disassociate the
1429 * objset from the zfsvfs.
1430 */
1431 rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1432 return (SET_ERROR(EBUSY));
1433 }
1434 }
1435 return (error);
1436 }
1437
1438 static void
1439 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1440 {
1441 rrw_exit(&zfsvfs->z_teardown_lock, tag);
1442
1443 if (zfsvfs->z_vfs) {
1444 VFS_RELE(zfsvfs->z_vfs);
1445 } else {
1446 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1447 zfsvfs_free(zfsvfs);
1448 }
1449 }
1450
1451 static int
1452 zfs_ioc_pool_create(zfs_cmd_t *zc)
1453 {
1454 int error;
1455 nvlist_t *config, *props = NULL;
1456 nvlist_t *rootprops = NULL;
1457 nvlist_t *zplprops = NULL;
1458
1459 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1460 zc->zc_iflags, &config))
1461 return (error);
1462
1463 if (zc->zc_nvlist_src_size != 0 && (error =
1464 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1465 zc->zc_iflags, &props))) {
1466 nvlist_free(config);
1467 return (error);
1468 }
1469
1470 if (props) {
1471 nvlist_t *nvl = NULL;
1472 uint64_t version = SPA_VERSION;
1473
1474 (void) nvlist_lookup_uint64(props,
1475 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1476 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1477 error = SET_ERROR(EINVAL);
1478 goto pool_props_bad;
1479 }
1480 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1481 if (nvl) {
1482 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1483 if (error != 0) {
1484 nvlist_free(config);
1485 nvlist_free(props);
1486 return (error);
1487 }
1488 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1489 }
1490 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1491 error = zfs_fill_zplprops_root(version, rootprops,
1492 zplprops, NULL);
1493 if (error != 0)
1494 goto pool_props_bad;
1495 }
1496
1497 error = spa_create(zc->zc_name, config, props, zplprops);
1498
1499 /*
1500 * Set the remaining root properties
1501 */
1502 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1503 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1504 (void) spa_destroy(zc->zc_name);
1505
1506 pool_props_bad:
1507 nvlist_free(rootprops);
1508 nvlist_free(zplprops);
1509 nvlist_free(config);
1510 nvlist_free(props);
1511
1512 return (error);
1513 }
1514
1515 static int
1516 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1517 {
1518 int error;
1519 zfs_log_history(zc);
1520 error = spa_destroy(zc->zc_name);
1521 if (error == 0)
1522 zvol_remove_minors(zc->zc_name);
1523 return (error);
1524 }
1525
1526 static int
1527 zfs_ioc_pool_import(zfs_cmd_t *zc)
1528 {
1529 nvlist_t *config, *props = NULL;
1530 uint64_t guid;
1531 int error;
1532
1533 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1534 zc->zc_iflags, &config)) != 0)
1535 return (error);
1536
1537 if (zc->zc_nvlist_src_size != 0 && (error =
1538 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1539 zc->zc_iflags, &props))) {
1540 nvlist_free(config);
1541 return (error);
1542 }
1543
1544 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1545 guid != zc->zc_guid)
1546 error = SET_ERROR(EINVAL);
1547 else
1548 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1549
1550 if (zc->zc_nvlist_dst != 0) {
1551 int err;
1552
1553 if ((err = put_nvlist(zc, config)) != 0)
1554 error = err;
1555 }
1556
1557 nvlist_free(config);
1558
1559 if (props)
1560 nvlist_free(props);
1561
1562 return (error);
1563 }
1564
1565 static int
1566 zfs_ioc_pool_export(zfs_cmd_t *zc)
1567 {
1568 int error;
1569 boolean_t force = (boolean_t)zc->zc_cookie;
1570 boolean_t hardforce = (boolean_t)zc->zc_guid;
1571
1572 zfs_log_history(zc);
1573 error = spa_export(zc->zc_name, NULL, force, hardforce);
1574 if (error == 0)
1575 zvol_remove_minors(zc->zc_name);
1576 return (error);
1577 }
1578
1579 static int
1580 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1581 {
1582 nvlist_t *configs;
1583 int error;
1584
1585 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1586 return (SET_ERROR(EEXIST));
1587
1588 error = put_nvlist(zc, configs);
1589
1590 nvlist_free(configs);
1591
1592 return (error);
1593 }
1594
1595 /*
1596 * inputs:
1597 * zc_name name of the pool
1598 *
1599 * outputs:
1600 * zc_cookie real errno
1601 * zc_nvlist_dst config nvlist
1602 * zc_nvlist_dst_size size of config nvlist
1603 */
1604 static int
1605 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1606 {
1607 nvlist_t *config;
1608 int error;
1609 int ret = 0;
1610
1611 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1612 sizeof (zc->zc_value));
1613
1614 if (config != NULL) {
1615 ret = put_nvlist(zc, config);
1616 nvlist_free(config);
1617
1618 /*
1619 * The config may be present even if 'error' is non-zero.
1620 * In this case we return success, and preserve the real errno
1621 * in 'zc_cookie'.
1622 */
1623 zc->zc_cookie = error;
1624 } else {
1625 ret = error;
1626 }
1627
1628 return (ret);
1629 }
1630
1631 /*
1632 * Try to import the given pool, returning pool stats as appropriate so that
1633 * user land knows which devices are available and overall pool health.
1634 */
1635 static int
1636 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1637 {
1638 nvlist_t *tryconfig, *config;
1639 int error;
1640
1641 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1642 zc->zc_iflags, &tryconfig)) != 0)
1643 return (error);
1644
1645 config = spa_tryimport(tryconfig);
1646
1647 nvlist_free(tryconfig);
1648
1649 if (config == NULL)
1650 return (SET_ERROR(EINVAL));
1651
1652 error = put_nvlist(zc, config);
1653 nvlist_free(config);
1654
1655 return (error);
1656 }
1657
1658 /*
1659 * inputs:
1660 * zc_name name of the pool
1661 * zc_cookie scan func (pool_scan_func_t)
1662 */
1663 static int
1664 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1665 {
1666 spa_t *spa;
1667 int error;
1668
1669 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1670 return (error);
1671
1672 if (zc->zc_cookie == POOL_SCAN_NONE)
1673 error = spa_scan_stop(spa);
1674 else
1675 error = spa_scan(spa, zc->zc_cookie);
1676
1677 spa_close(spa, FTAG);
1678
1679 return (error);
1680 }
1681
1682 static int
1683 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1684 {
1685 spa_t *spa;
1686 int error;
1687
1688 error = spa_open(zc->zc_name, &spa, FTAG);
1689 if (error == 0) {
1690 spa_freeze(spa);
1691 spa_close(spa, FTAG);
1692 }
1693 return (error);
1694 }
1695
1696 static int
1697 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1698 {
1699 spa_t *spa;
1700 int error;
1701
1702 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1703 return (error);
1704
1705 if (zc->zc_cookie < spa_version(spa) ||
1706 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1707 spa_close(spa, FTAG);
1708 return (SET_ERROR(EINVAL));
1709 }
1710
1711 spa_upgrade(spa, zc->zc_cookie);
1712 spa_close(spa, FTAG);
1713
1714 return (error);
1715 }
1716
1717 static int
1718 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1719 {
1720 spa_t *spa;
1721 char *hist_buf;
1722 uint64_t size;
1723 int error;
1724
1725 if ((size = zc->zc_history_len) == 0)
1726 return (SET_ERROR(EINVAL));
1727
1728 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1729 return (error);
1730
1731 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1732 spa_close(spa, FTAG);
1733 return (SET_ERROR(ENOTSUP));
1734 }
1735
1736 hist_buf = kmem_alloc(size, KM_SLEEP);
1737 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1738 &zc->zc_history_len, hist_buf)) == 0) {
1739 error = ddi_copyout(hist_buf,
1740 (void *)(uintptr_t)zc->zc_history,
1741 zc->zc_history_len, zc->zc_iflags);
1742 }
1743
1744 spa_close(spa, FTAG);
1745 kmem_free(hist_buf, size);
1746 return (error);
1747 }
1748
1749 static int
1750 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1751 {
1752 spa_t *spa;
1753 int error;
1754
1755 error = spa_open(zc->zc_name, &spa, FTAG);
1756 if (error == 0) {
1757 error = spa_change_guid(spa);
1758 spa_close(spa, FTAG);
1759 }
1760 return (error);
1761 }
1762
1763 static int
1764 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1765 {
1766 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1767 }
1768
1769 /*
1770 * inputs:
1771 * zc_name name of filesystem
1772 * zc_obj object to find
1773 *
1774 * outputs:
1775 * zc_value name of object
1776 */
1777 static int
1778 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1779 {
1780 objset_t *os;
1781 int error;
1782
1783 /* XXX reading from objset not owned */
1784 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1785 return (error);
1786 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1787 dmu_objset_rele(os, FTAG);
1788 return (SET_ERROR(EINVAL));
1789 }
1790 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1791 sizeof (zc->zc_value));
1792 dmu_objset_rele(os, FTAG);
1793
1794 return (error);
1795 }
1796
1797 /*
1798 * inputs:
1799 * zc_name name of filesystem
1800 * zc_obj object to find
1801 *
1802 * outputs:
1803 * zc_stat stats on object
1804 * zc_value path to object
1805 */
1806 static int
1807 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1808 {
1809 objset_t *os;
1810 int error;
1811
1812 /* XXX reading from objset not owned */
1813 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1814 return (error);
1815 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1816 dmu_objset_rele(os, FTAG);
1817 return (SET_ERROR(EINVAL));
1818 }
1819 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1820 sizeof (zc->zc_value));
1821 dmu_objset_rele(os, FTAG);
1822
1823 return (error);
1824 }
1825
1826 static int
1827 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1828 {
1829 spa_t *spa;
1830 int error;
1831 nvlist_t *config, **l2cache, **spares;
1832 uint_t nl2cache = 0, nspares = 0;
1833
1834 error = spa_open(zc->zc_name, &spa, FTAG);
1835 if (error != 0)
1836 return (error);
1837
1838 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1839 zc->zc_iflags, &config);
1840 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1841 &l2cache, &nl2cache);
1842
1843 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1844 &spares, &nspares);
1845
1846 /*
1847 * A root pool with concatenated devices is not supported.
1848 * Thus, can not add a device to a root pool.
1849 *
1850 * Intent log device can not be added to a rootpool because
1851 * during mountroot, zil is replayed, a seperated log device
1852 * can not be accessed during the mountroot time.
1853 *
1854 * l2cache and spare devices are ok to be added to a rootpool.
1855 */
1856 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1857 nvlist_free(config);
1858 spa_close(spa, FTAG);
1859 return (SET_ERROR(EDOM));
1860 }
1861
1862 if (error == 0) {
1863 error = spa_vdev_add(spa, config);
1864 nvlist_free(config);
1865 }
1866 spa_close(spa, FTAG);
1867 return (error);
1868 }
1869
1870 /*
1871 * inputs:
1872 * zc_name name of the pool
1873 * zc_nvlist_conf nvlist of devices to remove
1874 * zc_cookie to stop the remove?
1875 */
1876 static int
1877 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1878 {
1879 spa_t *spa;
1880 int error;
1881
1882 error = spa_open(zc->zc_name, &spa, FTAG);
1883 if (error != 0)
1884 return (error);
1885 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1886 spa_close(spa, FTAG);
1887 return (error);
1888 }
1889
1890 static int
1891 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1892 {
1893 spa_t *spa;
1894 int error;
1895 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1896
1897 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1898 return (error);
1899 switch (zc->zc_cookie) {
1900 case VDEV_STATE_ONLINE:
1901 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1902 break;
1903
1904 case VDEV_STATE_OFFLINE:
1905 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1906 break;
1907
1908 case VDEV_STATE_FAULTED:
1909 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1910 zc->zc_obj != VDEV_AUX_EXTERNAL)
1911 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1912
1913 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1914 break;
1915
1916 case VDEV_STATE_DEGRADED:
1917 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1918 zc->zc_obj != VDEV_AUX_EXTERNAL)
1919 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1920
1921 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1922 break;
1923
1924 default:
1925 error = SET_ERROR(EINVAL);
1926 }
1927 zc->zc_cookie = newstate;
1928 spa_close(spa, FTAG);
1929 return (error);
1930 }
1931
1932 static int
1933 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1934 {
1935 spa_t *spa;
1936 int replacing = zc->zc_cookie;
1937 nvlist_t *config;
1938 int error;
1939
1940 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1941 return (error);
1942
1943 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1944 zc->zc_iflags, &config)) == 0) {
1945 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1946 nvlist_free(config);
1947 }
1948
1949 spa_close(spa, FTAG);
1950 return (error);
1951 }
1952
1953 static int
1954 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1955 {
1956 spa_t *spa;
1957 int error;
1958
1959 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1960 return (error);
1961
1962 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1963
1964 spa_close(spa, FTAG);
1965 return (error);
1966 }
1967
1968 static int
1969 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1970 {
1971 spa_t *spa;
1972 nvlist_t *config, *props = NULL;
1973 int error;
1974 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1975
1976 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1977 return (error);
1978
1979 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1980 zc->zc_iflags, &config)) {
1981 spa_close(spa, FTAG);
1982 return (error);
1983 }
1984
1985 if (zc->zc_nvlist_src_size != 0 && (error =
1986 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1987 zc->zc_iflags, &props))) {
1988 spa_close(spa, FTAG);
1989 nvlist_free(config);
1990 return (error);
1991 }
1992
1993 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1994
1995 spa_close(spa, FTAG);
1996
1997 nvlist_free(config);
1998 nvlist_free(props);
1999
2000 return (error);
2001 }
2002
2003 static int
2004 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
2005 {
2006 spa_t *spa;
2007 char *path = zc->zc_value;
2008 uint64_t guid = zc->zc_guid;
2009 int error;
2010
2011 error = spa_open(zc->zc_name, &spa, FTAG);
2012 if (error != 0)
2013 return (error);
2014
2015 error = spa_vdev_setpath(spa, guid, path);
2016 spa_close(spa, FTAG);
2017 return (error);
2018 }
2019
2020 static int
2021 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
2022 {
2023 spa_t *spa;
2024 char *fru = zc->zc_value;
2025 uint64_t guid = zc->zc_guid;
2026 int error;
2027
2028 error = spa_open(zc->zc_name, &spa, FTAG);
2029 if (error != 0)
2030 return (error);
2031
2032 error = spa_vdev_setfru(spa, guid, fru);
2033 spa_close(spa, FTAG);
2034 return (error);
2035 }
2036
2037 static int
2038 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
2039 {
2040 int error = 0;
2041 nvlist_t *nv;
2042
2043 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2044
2045 if (zc->zc_nvlist_dst != 0 &&
2046 (error = dsl_prop_get_all(os, &nv)) == 0) {
2047 dmu_objset_stats(os, nv);
2048 /*
2049 * NB: zvol_get_stats() will read the objset contents,
2050 * which we aren't supposed to do with a
2051 * DS_MODE_USER hold, because it could be
2052 * inconsistent. So this is a bit of a workaround...
2053 * XXX reading with out owning
2054 */
2055 if (!zc->zc_objset_stats.dds_inconsistent &&
2056 dmu_objset_type(os) == DMU_OST_ZVOL) {
2057 error = zvol_get_stats(os, nv);
2058 if (error == EIO)
2059 return (error);
2060 VERIFY0(error);
2061 }
2062 error = put_nvlist(zc, nv);
2063 nvlist_free(nv);
2064 }
2065
2066 return (error);
2067 }
2068
2069 /*
2070 * inputs:
2071 * zc_name name of filesystem
2072 * zc_nvlist_dst_size size of buffer for property nvlist
2073 *
2074 * outputs:
2075 * zc_objset_stats stats
2076 * zc_nvlist_dst property nvlist
2077 * zc_nvlist_dst_size size of property nvlist
2078 */
2079 static int
2080 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2081 {
2082 objset_t *os;
2083 int error;
2084
2085 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2086 if (error == 0) {
2087 error = zfs_ioc_objset_stats_impl(zc, os);
2088 dmu_objset_rele(os, FTAG);
2089 }
2090
2091 return (error);
2092 }
2093
2094 /*
2095 * inputs:
2096 * zc_name name of filesystem
2097 * zc_nvlist_dst_size size of buffer for property nvlist
2098 *
2099 * outputs:
2100 * zc_nvlist_dst received property nvlist
2101 * zc_nvlist_dst_size size of received property nvlist
2102 *
2103 * Gets received properties (distinct from local properties on or after
2104 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2105 * local property values.
2106 */
2107 static int
2108 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2109 {
2110 int error = 0;
2111 nvlist_t *nv;
2112
2113 /*
2114 * Without this check, we would return local property values if the
2115 * caller has not already received properties on or after
2116 * SPA_VERSION_RECVD_PROPS.
2117 */
2118 if (!dsl_prop_get_hasrecvd(zc->zc_name))
2119 return (SET_ERROR(ENOTSUP));
2120
2121 if (zc->zc_nvlist_dst != 0 &&
2122 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2123 error = put_nvlist(zc, nv);
2124 nvlist_free(nv);
2125 }
2126
2127 return (error);
2128 }
2129
2130 static int
2131 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2132 {
2133 uint64_t value;
2134 int error;
2135
2136 /*
2137 * zfs_get_zplprop() will either find a value or give us
2138 * the default value (if there is one).
2139 */
2140 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2141 return (error);
2142 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2143 return (0);
2144 }
2145
2146 /*
2147 * inputs:
2148 * zc_name name of filesystem
2149 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2150 *
2151 * outputs:
2152 * zc_nvlist_dst zpl property nvlist
2153 * zc_nvlist_dst_size size of zpl property nvlist
2154 */
2155 static int
2156 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2157 {
2158 objset_t *os;
2159 int err;
2160
2161 /* XXX reading without owning */
2162 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2163 return (err);
2164
2165 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2166
2167 /*
2168 * NB: nvl_add_zplprop() will read the objset contents,
2169 * which we aren't supposed to do with a DS_MODE_USER
2170 * hold, because it could be inconsistent.
2171 */
2172 if (zc->zc_nvlist_dst != NULL &&
2173 !zc->zc_objset_stats.dds_inconsistent &&
2174 dmu_objset_type(os) == DMU_OST_ZFS) {
2175 nvlist_t *nv;
2176
2177 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2178 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2179 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2180 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2181 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2182 err = put_nvlist(zc, nv);
2183 nvlist_free(nv);
2184 } else {
2185 err = SET_ERROR(ENOENT);
2186 }
2187 dmu_objset_rele(os, FTAG);
2188 return (err);
2189 }
2190
2191 static boolean_t
2192 dataset_name_hidden(const char *name)
2193 {
2194 /*
2195 * Skip over datasets that are not visible in this zone,
2196 * internal datasets (which have a $ in their name), and
2197 * temporary datasets (which have a % in their name).
2198 */
2199 if (strchr(name, '$') != NULL)
2200 return (B_TRUE);
2201 if (strchr(name, '%') != NULL)
2202 return (B_TRUE);
2203 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2204 return (B_TRUE);
2205 return (B_FALSE);
2206 }
2207
2208 /*
2209 * inputs:
2210 * zc_name name of filesystem
2211 * zc_cookie zap cursor
2212 * zc_nvlist_dst_size size of buffer for property nvlist
2213 *
2214 * outputs:
2215 * zc_name name of next filesystem
2216 * zc_cookie zap cursor
2217 * zc_objset_stats stats
2218 * zc_nvlist_dst property nvlist
2219 * zc_nvlist_dst_size size of property nvlist
2220 */
2221 static int
2222 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2223 {
2224 objset_t *os;
2225 int error;
2226 char *p;
2227 size_t orig_len = strlen(zc->zc_name);
2228
2229 top:
2230 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2231 if (error == ENOENT)
2232 error = SET_ERROR(ESRCH);
2233 return (error);
2234 }
2235
2236 p = strrchr(zc->zc_name, '/');
2237 if (p == NULL || p[1] != '\0')
2238 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2239 p = zc->zc_name + strlen(zc->zc_name);
2240
2241 do {
2242 error = dmu_dir_list_next(os,
2243 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2244 NULL, &zc->zc_cookie);
2245 if (error == ENOENT)
2246 error = SET_ERROR(ESRCH);
2247 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2248 dmu_objset_rele(os, FTAG);
2249
2250 /*
2251 * If it's an internal dataset (ie. with a '$' in its name),
2252 * don't try to get stats for it, otherwise we'll return ENOENT.
2253 */
2254 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2255 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2256 if (error == ENOENT) {
2257 /* We lost a race with destroy, get the next one. */
2258 zc->zc_name[orig_len] = '\0';
2259 goto top;
2260 }
2261 }
2262 return (error);
2263 }
2264
2265 /*
2266 * inputs:
2267 * zc_name name of filesystem
2268 * zc_cookie zap cursor
2269 * zc_nvlist_dst_size size of buffer for property nvlist
2270 *
2271 * outputs:
2272 * zc_name name of next snapshot
2273 * zc_objset_stats stats
2274 * zc_nvlist_dst property nvlist
2275 * zc_nvlist_dst_size size of property nvlist
2276 */
2277 static int
2278 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2279 {
2280 objset_t *os;
2281 int error;
2282
2283 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2284 if (error != 0) {
2285 return (error == ENOENT ? ESRCH : error);
2286 }
2287
2288 /*
2289 * A dataset name of maximum length cannot have any snapshots,
2290 * so exit immediately.
2291 */
2292 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2293 dmu_objset_rele(os, FTAG);
2294 return (SET_ERROR(ESRCH));
2295 }
2296
2297 error = dmu_snapshot_list_next(os,
2298 sizeof (zc->zc_name) - strlen(zc->zc_name),
2299 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2300 NULL);
2301
2302 if (error == 0) {
2303 dsl_dataset_t *ds;
2304 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2305
2306 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2307 if (error == 0) {
2308 objset_t *ossnap;
2309
2310 error = dmu_objset_from_ds(ds, &ossnap);
2311 if (error == 0)
2312 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2313 dsl_dataset_rele(ds, FTAG);
2314 }
2315 } else if (error == ENOENT) {
2316 error = SET_ERROR(ESRCH);
2317 }
2318
2319 dmu_objset_rele(os, FTAG);
2320 /* if we failed, undo the @ that we tacked on to zc_name */
2321 if (error != 0)
2322 *strchr(zc->zc_name, '@') = '\0';
2323 return (error);
2324 }
2325
2326 static int
2327 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2328 {
2329 const char *propname = nvpair_name(pair);
2330 uint64_t *valary;
2331 unsigned int vallen;
2332 const char *domain;
2333 char *dash;
2334 zfs_userquota_prop_t type;
2335 uint64_t rid;
2336 uint64_t quota;
2337 zfsvfs_t *zfsvfs;
2338 int err;
2339
2340 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2341 nvlist_t *attrs;
2342 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2343 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2344 &pair) != 0)
2345 return (SET_ERROR(EINVAL));
2346 }
2347
2348 /*
2349 * A correctly constructed propname is encoded as
2350 * userquota@<rid>-<domain>.
2351 */
2352 if ((dash = strchr(propname, '-')) == NULL ||
2353 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2354 vallen != 3)
2355 return (SET_ERROR(EINVAL));
2356
2357 domain = dash + 1;
2358 type = valary[0];
2359 rid = valary[1];
2360 quota = valary[2];
2361
2362 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2363 if (err == 0) {
2364 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2365 zfsvfs_rele(zfsvfs, FTAG);
2366 }
2367
2368 return (err);
2369 }
2370
2371 /*
2372 * If the named property is one that has a special function to set its value,
2373 * return 0 on success and a positive error code on failure; otherwise if it is
2374 * not one of the special properties handled by this function, return -1.
2375 *
2376 * XXX: It would be better for callers of the property interface if we handled
2377 * these special cases in dsl_prop.c (in the dsl layer).
2378 */
2379 static int
2380 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2381 nvpair_t *pair)
2382 {
2383 const char *propname = nvpair_name(pair);
2384 zfs_prop_t prop = zfs_name_to_prop(propname);
2385 uint64_t intval;
2386 int err;
2387
2388 if (prop == ZPROP_INVAL) {
2389 if (zfs_prop_userquota(propname))
2390 return (zfs_prop_set_userquota(dsname, pair));
2391 return (-1);
2392 }
2393
2394 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2395 nvlist_t *attrs;
2396 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2397 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2398 &pair) == 0);
2399 }
2400
2401 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2402 return (-1);
2403
2404 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2405
2406 switch (prop) {
2407 case ZFS_PROP_QUOTA:
2408 err = dsl_dir_set_quota(dsname, source, intval);
2409 break;
2410 case ZFS_PROP_REFQUOTA:
2411 err = dsl_dataset_set_refquota(dsname, source, intval);
2412 break;
2413 case ZFS_PROP_FILESYSTEM_LIMIT:
2414 case ZFS_PROP_SNAPSHOT_LIMIT:
2415 if (intval == UINT64_MAX) {
2416 /* clearing the limit, just do it */
2417 err = 0;
2418 } else {
2419 err = dsl_dir_activate_fs_ss_limit(dsname);
2420 }
2421 /*
2422 * Set err to -1 to force the zfs_set_prop_nvlist code down the
2423 * default path to set the value in the nvlist.
2424 */
2425 if (err == 0)
2426 err = -1;
2427 break;
2428 case ZFS_PROP_RESERVATION:
2429 err = dsl_dir_set_reservation(dsname, source, intval);
2430 break;
2431 case ZFS_PROP_REFRESERVATION:
2432 err = dsl_dataset_set_refreservation(dsname, source, intval);
2433 break;
2434 case ZFS_PROP_VOLSIZE:
2435 err = zvol_set_volsize(dsname, intval);
2436 break;
2437 case ZFS_PROP_VERSION:
2438 {
2439 zfsvfs_t *zfsvfs;
2440
2441 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2442 break;
2443
2444 err = zfs_set_version(zfsvfs, intval);
2445 zfsvfs_rele(zfsvfs, FTAG);
2446
2447 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2448 zfs_cmd_t *zc;
2449
2450 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2451 (void) strcpy(zc->zc_name, dsname);
2452 (void) zfs_ioc_userspace_upgrade(zc);
2453 kmem_free(zc, sizeof (zfs_cmd_t));
2454 }
2455 break;
2456 }
2457 default:
2458 err = -1;
2459 }
2460
2461 return (err);
2462 }
2463
2464 /*
2465 * This function is best effort. If it fails to set any of the given properties,
2466 * it continues to set as many as it can and returns the last error
2467 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2468 * with the list of names of all the properties that failed along with the
2469 * corresponding error numbers.
2470 *
2471 * If every property is set successfully, zero is returned and errlist is not
2472 * modified.
2473 */
2474 int
2475 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2476 nvlist_t *errlist)
2477 {
2478 nvpair_t *pair;
2479 nvpair_t *propval;
2480 int rv = 0;
2481 uint64_t intval;
2482 char *strval;
2483 nvlist_t *genericnvl = fnvlist_alloc();
2484 nvlist_t *retrynvl = fnvlist_alloc();
2485
2486 retry:
2487 pair = NULL;
2488 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2489 const char *propname = nvpair_name(pair);
2490 zfs_prop_t prop = zfs_name_to_prop(propname);
2491 int err = 0;
2492
2493 /* decode the property value */
2494 propval = pair;
2495 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2496 nvlist_t *attrs;
2497 attrs = fnvpair_value_nvlist(pair);
2498 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2499 &propval) != 0)
2500 err = SET_ERROR(EINVAL);
2501 }
2502
2503 /* Validate value type */
2504 if (err == 0 && prop == ZPROP_INVAL) {
2505 if (zfs_prop_user(propname)) {
2506 if (nvpair_type(propval) != DATA_TYPE_STRING)
2507 err = SET_ERROR(EINVAL);
2508 } else if (zfs_prop_userquota(propname)) {
2509 if (nvpair_type(propval) !=
2510 DATA_TYPE_UINT64_ARRAY)
2511 err = SET_ERROR(EINVAL);
2512 } else {
2513 err = SET_ERROR(EINVAL);
2514 }
2515 } else if (err == 0) {
2516 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2517 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2518 err = SET_ERROR(EINVAL);
2519 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2520 const char *unused;
2521
2522 intval = fnvpair_value_uint64(propval);
2523
2524 switch (zfs_prop_get_type(prop)) {
2525 case PROP_TYPE_NUMBER:
2526 break;
2527 case PROP_TYPE_STRING:
2528 err = SET_ERROR(EINVAL);
2529 break;
2530 case PROP_TYPE_INDEX:
2531 if (zfs_prop_index_to_string(prop,
2532 intval, &unused) != 0)
2533 err = SET_ERROR(EINVAL);
2534 break;
2535 default:
2536 cmn_err(CE_PANIC,
2537 "unknown property type");
2538 }
2539 } else {
2540 err = SET_ERROR(EINVAL);
2541 }
2542 }
2543
2544 /* Validate permissions */
2545 if (err == 0)
2546 err = zfs_check_settable(dsname, pair, CRED());
2547
2548 if (err == 0) {
2549 err = zfs_prop_set_special(dsname, source, pair);
2550 if (err == -1) {
2551 /*
2552 * For better performance we build up a list of
2553 * properties to set in a single transaction.
2554 */
2555 err = nvlist_add_nvpair(genericnvl, pair);
2556 } else if (err != 0 && nvl != retrynvl) {
2557 /*
2558 * This may be a spurious error caused by
2559 * receiving quota and reservation out of order.
2560 * Try again in a second pass.
2561 */
2562 err = nvlist_add_nvpair(retrynvl, pair);
2563 }
2564 }
2565
2566 if (err != 0) {
2567 if (errlist != NULL)
2568 fnvlist_add_int32(errlist, propname, err);
2569 rv = err;
2570 }
2571 }
2572
2573 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2574 nvl = retrynvl;
2575 goto retry;
2576 }
2577
2578 if (!nvlist_empty(genericnvl) &&
2579 dsl_props_set(dsname, source, genericnvl) != 0) {
2580 /*
2581 * If this fails, we still want to set as many properties as we
2582 * can, so try setting them individually.
2583 */
2584 pair = NULL;
2585 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2586 const char *propname = nvpair_name(pair);
2587 int err = 0;
2588
2589 propval = pair;
2590 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2591 nvlist_t *attrs;
2592 attrs = fnvpair_value_nvlist(pair);
2593 propval = fnvlist_lookup_nvpair(attrs,
2594 ZPROP_VALUE);
2595 }
2596
2597 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2598 strval = fnvpair_value_string(propval);
2599 err = dsl_prop_set_string(dsname, propname,
2600 source, strval);
2601 } else {
2602 intval = fnvpair_value_uint64(propval);
2603 err = dsl_prop_set_int(dsname, propname, source,
2604 intval);
2605 }
2606
2607 if (err != 0) {
2608 if (errlist != NULL) {
2609 fnvlist_add_int32(errlist, propname,
2610 err);
2611 }
2612 rv = err;
2613 }
2614 }
2615 }
2616 nvlist_free(genericnvl);
2617 nvlist_free(retrynvl);
2618
2619 return (rv);
2620 }
2621
2622 /*
2623 * Check that all the properties are valid user properties.
2624 */
2625 static int
2626 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2627 {
2628 nvpair_t *pair = NULL;
2629 int error = 0;
2630
2631 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2632 const char *propname = nvpair_name(pair);
2633
2634 if (!zfs_prop_user(propname) ||
2635 nvpair_type(pair) != DATA_TYPE_STRING)
2636 return (SET_ERROR(EINVAL));
2637
2638 if (error = zfs_secpolicy_write_perms(fsname,
2639 ZFS_DELEG_PERM_USERPROP, CRED()))
2640 return (error);
2641
2642 if (strlen(propname) >= ZAP_MAXNAMELEN)
2643 return (SET_ERROR(ENAMETOOLONG));
2644
2645 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN)
2646 return (E2BIG);
2647 }
2648 return (0);
2649 }
2650
2651 static void
2652 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2653 {
2654 nvpair_t *pair;
2655
2656 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2657
2658 pair = NULL;
2659 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2660 if (nvlist_exists(skipped, nvpair_name(pair)))
2661 continue;
2662
2663 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2664 }
2665 }
2666
2667 static int
2668 clear_received_props(const char *dsname, nvlist_t *props,
2669 nvlist_t *skipped)
2670 {
2671 int err = 0;
2672 nvlist_t *cleared_props = NULL;
2673 props_skip(props, skipped, &cleared_props);
2674 if (!nvlist_empty(cleared_props)) {
2675 /*
2676 * Acts on local properties until the dataset has received
2677 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2678 */
2679 zprop_source_t flags = (ZPROP_SRC_NONE |
2680 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2681 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2682 }
2683 nvlist_free(cleared_props);
2684 return (err);
2685 }
2686
2687 /*
2688 * inputs:
2689 * zc_name name of filesystem
2690 * zc_value name of property to set
2691 * zc_nvlist_src{_size} nvlist of properties to apply
2692 * zc_cookie received properties flag
2693 *
2694 * outputs:
2695 * zc_nvlist_dst{_size} error for each unapplied received property
2696 */
2697 static int
2698 zfs_ioc_set_prop(zfs_cmd_t *zc)
2699 {
2700 nvlist_t *nvl;
2701 boolean_t received = zc->zc_cookie;
2702 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2703 ZPROP_SRC_LOCAL);
2704 nvlist_t *errors;
2705 int error;
2706
2707 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2708 zc->zc_iflags, &nvl)) != 0)
2709 return (error);
2710
2711 if (received) {
2712 nvlist_t *origprops;
2713
2714 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2715 (void) clear_received_props(zc->zc_name,
2716 origprops, nvl);
2717 nvlist_free(origprops);
2718 }
2719
2720 error = dsl_prop_set_hasrecvd(zc->zc_name);
2721 }
2722
2723 errors = fnvlist_alloc();
2724 if (error == 0)
2725 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2726
2727 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2728 (void) put_nvlist(zc, errors);
2729 }
2730
2731 nvlist_free(errors);
2732 nvlist_free(nvl);
2733 return (error);
2734 }
2735
2736 /*
2737 * inputs:
2738 * zc_name name of filesystem
2739 * zc_value name of property to inherit
2740 * zc_cookie revert to received value if TRUE
2741 *
2742 * outputs: none
2743 */
2744 static int
2745 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2746 {
2747 const char *propname = zc->zc_value;
2748 zfs_prop_t prop = zfs_name_to_prop(propname);
2749 boolean_t received = zc->zc_cookie;
2750 zprop_source_t source = (received
2751 ? ZPROP_SRC_NONE /* revert to received value, if any */
2752 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2753
2754 if (received) {
2755 nvlist_t *dummy;
2756 nvpair_t *pair;
2757 zprop_type_t type;
2758 int err;
2759
2760 /*
2761 * zfs_prop_set_special() expects properties in the form of an
2762 * nvpair with type info.
2763 */
2764 if (prop == ZPROP_INVAL) {
2765 if (!zfs_prop_user(propname))
2766 return (SET_ERROR(EINVAL));
2767
2768 type = PROP_TYPE_STRING;
2769 } else if (prop == ZFS_PROP_VOLSIZE ||
2770 prop == ZFS_PROP_VERSION) {
2771 return (SET_ERROR(EINVAL));
2772 } else {
2773 type = zfs_prop_get_type(prop);
2774 }
2775
2776 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2777
2778 switch (type) {
2779 case PROP_TYPE_STRING:
2780 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2781 break;
2782 case PROP_TYPE_NUMBER:
2783 case PROP_TYPE_INDEX:
2784 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2785 break;
2786 default:
2787 nvlist_free(dummy);
2788 return (SET_ERROR(EINVAL));
2789 }
2790
2791 pair = nvlist_next_nvpair(dummy, NULL);
2792 err = zfs_prop_set_special(zc->zc_name, source, pair);
2793 nvlist_free(dummy);
2794 if (err != -1)
2795 return (err); /* special property already handled */
2796 } else {
2797 /*
2798 * Only check this in the non-received case. We want to allow
2799 * 'inherit -S' to revert non-inheritable properties like quota
2800 * and reservation to the received or default values even though
2801 * they are not considered inheritable.
2802 */
2803 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2804 return (SET_ERROR(EINVAL));
2805 }
2806
2807 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2808 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2809 }
2810
2811 static int
2812 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2813 {
2814 nvlist_t *props;
2815 spa_t *spa;
2816 int error;
2817 nvpair_t *pair;
2818
2819 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2820 zc->zc_iflags, &props))
2821 return (error);
2822
2823 /*
2824 * If the only property is the configfile, then just do a spa_lookup()
2825 * to handle the faulted case.
2826 */
2827 pair = nvlist_next_nvpair(props, NULL);
2828 if (pair != NULL && strcmp(nvpair_name(pair),
2829 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2830 nvlist_next_nvpair(props, pair) == NULL) {
2831 mutex_enter(&spa_namespace_lock);
2832 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2833 spa_configfile_set(spa, props, B_FALSE);
2834 spa_config_sync(spa, B_FALSE, B_TRUE);
2835 }
2836 mutex_exit(&spa_namespace_lock);
2837 if (spa != NULL) {
2838 nvlist_free(props);
2839 return (0);
2840 }
2841 }
2842
2843 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2844 nvlist_free(props);
2845 return (error);
2846 }
2847
2848 error = spa_prop_set(spa, props);
2849
2850 nvlist_free(props);
2851 spa_close(spa, FTAG);
2852
2853 return (error);
2854 }
2855
2856 static int
2857 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2858 {
2859 spa_t *spa;
2860 int error;
2861 nvlist_t *nvp = NULL;
2862
2863 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2864 /*
2865 * If the pool is faulted, there may be properties we can still
2866 * get (such as altroot and cachefile), so attempt to get them
2867 * anyway.
2868 */
2869 mutex_enter(&spa_namespace_lock);
2870 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2871 error = spa_prop_get(spa, &nvp);
2872 mutex_exit(&spa_namespace_lock);
2873 } else {
2874 error = spa_prop_get(spa, &nvp);
2875 spa_close(spa, FTAG);
2876 }
2877
2878 if (error == 0 && zc->zc_nvlist_dst != NULL)
2879 error = put_nvlist(zc, nvp);
2880 else
2881 error = SET_ERROR(EFAULT);
2882
2883 nvlist_free(nvp);
2884 return (error);
2885 }
2886
2887 /*
2888 * inputs:
2889 * zc_name name of filesystem
2890 * zc_nvlist_src{_size} nvlist of delegated permissions
2891 * zc_perm_action allow/unallow flag
2892 *
2893 * outputs: none
2894 */
2895 static int
2896 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2897 {
2898 int error;
2899 nvlist_t *fsaclnv = NULL;
2900
2901 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2902 zc->zc_iflags, &fsaclnv)) != 0)
2903 return (error);
2904
2905 /*
2906 * Verify nvlist is constructed correctly
2907 */
2908 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2909 nvlist_free(fsaclnv);
2910 return (SET_ERROR(EINVAL));
2911 }
2912
2913 /*
2914 * If we don't have PRIV_SYS_MOUNT, then validate
2915 * that user is allowed to hand out each permission in
2916 * the nvlist(s)
2917 */
2918
2919 error = secpolicy_zfs(CRED());
2920 if (error != 0) {
2921 if (zc->zc_perm_action == B_FALSE) {
2922 error = dsl_deleg_can_allow(zc->zc_name,
2923 fsaclnv, CRED());
2924 } else {
2925 error = dsl_deleg_can_unallow(zc->zc_name,
2926 fsaclnv, CRED());
2927 }
2928 }
2929
2930 if (error == 0)
2931 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2932
2933 nvlist_free(fsaclnv);
2934 return (error);
2935 }
2936
2937 /*
2938 * inputs:
2939 * zc_name name of filesystem
2940 *
2941 * outputs:
2942 * zc_nvlist_src{_size} nvlist of delegated permissions
2943 */
2944 static int
2945 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2946 {
2947 nvlist_t *nvp;
2948 int error;
2949
2950 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2951 error = put_nvlist(zc, nvp);
2952 nvlist_free(nvp);
2953 }
2954
2955 return (error);
2956 }
2957
2958 /*
2959 * Search the vfs list for a specified resource. Returns a pointer to it
2960 * or NULL if no suitable entry is found. The caller of this routine
2961 * is responsible for releasing the returned vfs pointer.
2962 */
2963 static vfs_t *
2964 zfs_get_vfs(const char *resource)
2965 {
2966 struct vfs *vfsp;
2967 struct vfs *vfs_found = NULL;
2968
2969 vfs_list_read_lock();
2970 vfsp = rootvfs;
2971 do {
2972 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2973 VFS_HOLD(vfsp);
2974 vfs_found = vfsp;
2975 break;
2976 }
2977 vfsp = vfsp->vfs_next;
2978 } while (vfsp != rootvfs);
2979 vfs_list_unlock();
2980 return (vfs_found);
2981 }
2982
2983 /* ARGSUSED */
2984 static void
2985 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2986 {
2987 zfs_creat_t *zct = arg;
2988
2989 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2990 }
2991
2992 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2993
2994 /*
2995 * inputs:
2996 * os parent objset pointer (NULL if root fs)
2997 * fuids_ok fuids allowed in this version of the spa?
2998 * sa_ok SAs allowed in this version of the spa?
2999 * createprops list of properties requested by creator
3000 *
3001 * outputs:
3002 * zplprops values for the zplprops we attach to the master node object
3003 * is_ci true if requested file system will be purely case-insensitive
3004 *
3005 * Determine the settings for utf8only, normalization and
3006 * casesensitivity. Specific values may have been requested by the
3007 * creator and/or we can inherit values from the parent dataset. If
3008 * the file system is of too early a vintage, a creator can not
3009 * request settings for these properties, even if the requested
3010 * setting is the default value. We don't actually want to create dsl
3011 * properties for these, so remove them from the source nvlist after
3012 * processing.
3013 */
3014 static int
3015 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
3016 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
3017 nvlist_t *zplprops, boolean_t *is_ci)
3018 {
3019 uint64_t sense = ZFS_PROP_UNDEFINED;
3020 uint64_t norm = ZFS_PROP_UNDEFINED;
3021 uint64_t u8 = ZFS_PROP_UNDEFINED;
3022
3023 ASSERT(zplprops != NULL);
3024
3025 /*
3026 * Pull out creator prop choices, if any.
3027 */
3028 if (createprops) {
3029 (void) nvlist_lookup_uint64(createprops,
3030 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
3031 (void) nvlist_lookup_uint64(createprops,
3032 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
3033 (void) nvlist_remove_all(createprops,
3034 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
3035 (void) nvlist_lookup_uint64(createprops,
3036 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
3037 (void) nvlist_remove_all(createprops,
3038 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
3039 (void) nvlist_lookup_uint64(createprops,
3040 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3041 (void) nvlist_remove_all(createprops,
3042 zfs_prop_to_name(ZFS_PROP_CASE));
3043 }
3044
3045 /*
3046 * If the zpl version requested is whacky or the file system
3047 * or pool is version is too "young" to support normalization
3048 * and the creator tried to set a value for one of the props,
3049 * error out.
3050 */
3051 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3052 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3053 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3054 (zplver < ZPL_VERSION_NORMALIZATION &&
3055 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3056 sense != ZFS_PROP_UNDEFINED)))
3057 return (SET_ERROR(ENOTSUP));
3058
3059 /*
3060 * Put the version in the zplprops
3061 */
3062 VERIFY(nvlist_add_uint64(zplprops,
3063 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3064
3065 if (norm == ZFS_PROP_UNDEFINED)
3066 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3067 VERIFY(nvlist_add_uint64(zplprops,
3068 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3069
3070 /*
3071 * If we're normalizing, names must always be valid UTF-8 strings.
3072 */
3073 if (norm)
3074 u8 = 1;
3075 if (u8 == ZFS_PROP_UNDEFINED)
3076 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3077 VERIFY(nvlist_add_uint64(zplprops,
3078 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3079
3080 if (sense == ZFS_PROP_UNDEFINED)
3081 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3082 VERIFY(nvlist_add_uint64(zplprops,
3083 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3084
3085 if (is_ci)
3086 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3087
3088 return (0);
3089 }
3090
3091 static int
3092 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3093 nvlist_t *zplprops, boolean_t *is_ci)
3094 {
3095 boolean_t fuids_ok, sa_ok;
3096 uint64_t zplver = ZPL_VERSION;
3097 objset_t *os = NULL;
3098 char parentname[MAXNAMELEN];
3099 char *cp;
3100 spa_t *spa;
3101 uint64_t spa_vers;
3102 int error;
3103
3104 (void) strlcpy(parentname, dataset, sizeof (parentname));
3105 cp = strrchr(parentname, '/');
3106 ASSERT(cp != NULL);
3107 cp[0] = '\0';
3108
3109 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3110 return (error);
3111
3112 spa_vers = spa_version(spa);
3113 spa_close(spa, FTAG);
3114
3115 zplver = zfs_zpl_version_map(spa_vers);
3116 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3117 sa_ok = (zplver >= ZPL_VERSION_SA);
3118
3119 /*
3120 * Open parent object set so we can inherit zplprop values.
3121 */
3122 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3123 return (error);
3124
3125 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3126 zplprops, is_ci);
3127 dmu_objset_rele(os, FTAG);
3128 return (error);
3129 }
3130
3131 static int
3132 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3133 nvlist_t *zplprops, boolean_t *is_ci)
3134 {
3135 boolean_t fuids_ok;
3136 boolean_t sa_ok;
3137 uint64_t zplver = ZPL_VERSION;
3138 int error;
3139
3140 zplver = zfs_zpl_version_map(spa_vers);
3141 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3142 sa_ok = (zplver >= ZPL_VERSION_SA);
3143
3144 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3145 createprops, zplprops, is_ci);
3146 return (error);
3147 }
3148
3149 /*
3150 * innvl: {
3151 * "type" -> dmu_objset_type_t (int32)
3152 * (optional) "props" -> { prop -> value }
3153 * }
3154 *
3155 * outnvl: propname -> error code (int32)
3156 */
3157 static int
3158 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3159 {
3160 int error = 0;
3161 zfs_creat_t zct = { 0 };
3162 nvlist_t *nvprops = NULL;
3163 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3164 int32_t type32;
3165 dmu_objset_type_t type;
3166 boolean_t is_insensitive = B_FALSE;
3167
3168 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3169 return (SET_ERROR(EINVAL));
3170 type = type32;
3171 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3172
3173 switch (type) {
3174 case DMU_OST_ZFS:
3175 cbfunc = zfs_create_cb;
3176 break;
3177
3178 case DMU_OST_ZVOL:
3179 cbfunc = zvol_create_cb;
3180 break;
3181
3182 default:
3183 cbfunc = NULL;
3184 break;
3185 }
3186 if (strchr(fsname, '@') ||
3187 strchr(fsname, '%'))
3188 return (SET_ERROR(EINVAL));
3189
3190 zct.zct_props = nvprops;
3191
3192 if (cbfunc == NULL)
3193 return (SET_ERROR(EINVAL));
3194
3195 if (type == DMU_OST_ZVOL) {
3196 uint64_t volsize, volblocksize;
3197
3198 if (nvprops == NULL)
3199 return (SET_ERROR(EINVAL));
3200 if (nvlist_lookup_uint64(nvprops,
3201 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3202 return (SET_ERROR(EINVAL));
3203
3204 if ((error = nvlist_lookup_uint64(nvprops,
3205 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3206 &volblocksize)) != 0 && error != ENOENT)
3207 return (SET_ERROR(EINVAL));
3208
3209 if (error != 0)
3210 volblocksize = zfs_prop_default_numeric(
3211 ZFS_PROP_VOLBLOCKSIZE);
3212
3213 if ((error = zvol_check_volblocksize(
3214 volblocksize)) != 0 ||
3215 (error = zvol_check_volsize(volsize,
3216 volblocksize)) != 0)
3217 return (error);
3218 } else if (type == DMU_OST_ZFS) {
3219 int error;
3220
3221 /*
3222 * We have to have normalization and
3223 * case-folding flags correct when we do the
3224 * file system creation, so go figure them out
3225 * now.
3226 */
3227 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3228 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3229 error = zfs_fill_zplprops(fsname, nvprops,
3230 zct.zct_zplprops, &is_insensitive);
3231 if (error != 0) {
3232 nvlist_free(zct.zct_zplprops);
3233 return (error);
3234 }
3235 }
3236
3237 error = dmu_objset_create(fsname, type,
3238 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3239 nvlist_free(zct.zct_zplprops);
3240
3241 /*
3242 * It would be nice to do this atomically.
3243 */
3244 if (error == 0) {
3245 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3246 nvprops, outnvl);
3247 if (error != 0)
3248 (void) dsl_destroy_head(fsname);
3249 }
3250 return (error);
3251 }
3252
3253 /*
3254 * innvl: {
3255 * "origin" -> name of origin snapshot
3256 * (optional) "props" -> { prop -> value }
3257 * }
3258 *
3259 * outnvl: propname -> error code (int32)
3260 */
3261 static int
3262 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3263 {
3264 int error = 0;
3265 nvlist_t *nvprops = NULL;
3266 char *origin_name;
3267
3268 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3269 return (SET_ERROR(EINVAL));
3270 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3271
3272 if (strchr(fsname, '@') ||
3273 strchr(fsname, '%'))
3274 return (SET_ERROR(EINVAL));
3275
3276 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3277 return (SET_ERROR(EINVAL));
3278 error = dmu_objset_clone(fsname, origin_name);
3279 if (error != 0)
3280 return (error);
3281
3282 /*
3283 * It would be nice to do this atomically.
3284 */
3285 if (error == 0) {
3286 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3287 nvprops, outnvl);
3288 if (error != 0)
3289 (void) dsl_destroy_head(fsname);
3290 }
3291 return (error);
3292 }
3293
3294 /*
3295 * innvl: {
3296 * "snaps" -> { snapshot1, snapshot2 }
3297 * (optional) "props" -> { prop -> value (string) }
3298 * }
3299 *
3300 * outnvl: snapshot -> error code (int32)
3301 */
3302 static int
3303 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3304 {
3305 nvlist_t *snaps;
3306 nvlist_t *props = NULL;
3307 int error, poollen;
3308 nvpair_t *pair;
3309
3310 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3311 if ((error = zfs_check_userprops(poolname, props)) != 0)
3312 return (error);
3313
3314 if (!nvlist_empty(props) &&
3315 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3316 return (SET_ERROR(ENOTSUP));
3317
3318 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3319 return (SET_ERROR(EINVAL));
3320 poollen = strlen(poolname);
3321 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3322 pair = nvlist_next_nvpair(snaps, pair)) {
3323 const char *name = nvpair_name(pair);
3324 const char *cp = strchr(name, '@');
3325
3326 /*
3327 * The snap name must contain an @, and the part after it must
3328 * contain only valid characters.
3329 */
3330 if (cp == NULL ||
3331 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3332 return (SET_ERROR(EINVAL));
3333
3334 /*
3335 * The snap must be in the specified pool.
3336 */
3337 if (strncmp(name, poolname, poollen) != 0 ||
3338 (name[poollen] != '/' && name[poollen] != '@'))
3339 return (SET_ERROR(EXDEV));
3340
3341 /* This must be the only snap of this fs. */
3342 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3343 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3344 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3345 == 0) {
3346 return (SET_ERROR(EXDEV));
3347 }
3348 }
3349 }
3350
3351 error = dsl_dataset_snapshot(snaps, props, outnvl);
3352 return (error);
3353 }
3354
3355 /*
3356 * innvl: "message" -> string
3357 */
3358 /* ARGSUSED */
3359 static int
3360 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3361 {
3362 char *message;
3363 spa_t *spa;
3364 int error;
3365 char *poolname;
3366
3367 /*
3368 * The poolname in the ioctl is not set, we get it from the TSD,
3369 * which was set at the end of the last successful ioctl that allows
3370 * logging. The secpolicy func already checked that it is set.
3371 * Only one log ioctl is allowed after each successful ioctl, so
3372 * we clear the TSD here.
3373 */
3374 poolname = tsd_get(zfs_allow_log_key);
3375 (void) tsd_set(zfs_allow_log_key, NULL);
3376 error = spa_open(poolname, &spa, FTAG);
3377 strfree(poolname);
3378 if (error != 0)
3379 return (error);
3380
3381 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3382 spa_close(spa, FTAG);
3383 return (SET_ERROR(EINVAL));
3384 }
3385
3386 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3387 spa_close(spa, FTAG);
3388 return (SET_ERROR(ENOTSUP));
3389 }
3390
3391 error = spa_history_log(spa, message);
3392 spa_close(spa, FTAG);
3393 return (error);
3394 }
3395
3396 /*
3397 * The dp_config_rwlock must not be held when calling this, because the
3398 * unmount may need to write out data.
3399 *
3400 * This function is best-effort. Callers must deal gracefully if it
3401 * remains mounted (or is remounted after this call).
3402 *
3403 * Returns 0 if the argument is not a snapshot, or it is not currently a
3404 * filesystem, or we were able to unmount it. Returns error code otherwise.
3405 */
3406 int
3407 zfs_unmount_snap(const char *snapname)
3408 {
3409 vfs_t *vfsp;
3410 zfsvfs_t *zfsvfs;
3411 int err;
3412
3413 if (strchr(snapname, '@') == NULL)
3414 return (0);
3415
3416 vfsp = zfs_get_vfs(snapname);
3417 if (vfsp == NULL)
3418 return (0);
3419
3420 zfsvfs = vfsp->vfs_data;
3421 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3422
3423 err = vn_vfswlock(vfsp->vfs_vnodecovered);
3424 VFS_RELE(vfsp);
3425 if (err != 0)
3426 return (SET_ERROR(err));
3427
3428 /*
3429 * Always force the unmount for snapshots.
3430 */
3431 (void) dounmount(vfsp, MS_FORCE, kcred);
3432 return (0);
3433 }
3434
3435 /* ARGSUSED */
3436 static int
3437 zfs_unmount_snap_cb(const char *snapname, void *arg)
3438 {
3439 return (zfs_unmount_snap(snapname));
3440 }
3441
3442 /*
3443 * When a clone is destroyed, its origin may also need to be destroyed,
3444 * in which case it must be unmounted. This routine will do that unmount
3445 * if necessary.
3446 */
3447 void
3448 zfs_destroy_unmount_origin(const char *fsname)
3449 {
3450 int error;
3451 objset_t *os;
3452 dsl_dataset_t *ds;
3453
3454 error = dmu_objset_hold(fsname, FTAG, &os);
3455 if (error != 0)
3456 return;
3457 ds = dmu_objset_ds(os);
3458 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3459 char originname[MAXNAMELEN];
3460 dsl_dataset_name(ds->ds_prev, originname);
3461 dmu_objset_rele(os, FTAG);
3462 (void) zfs_unmount_snap(originname);
3463 } else {
3464 dmu_objset_rele(os, FTAG);
3465 }
3466 }
3467
3468 /*
3469 * innvl: {
3470 * "snaps" -> { snapshot1, snapshot2 }
3471 * (optional boolean) "defer"
3472 * }
3473 *
3474 * outnvl: snapshot -> error code (int32)
3475 *
3476 */
3477 /* ARGSUSED */
3478 static int
3479 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3480 {
3481 nvlist_t *snaps;
3482 nvpair_t *pair;
3483 boolean_t defer;
3484
3485 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3486 return (SET_ERROR(EINVAL));
3487 defer = nvlist_exists(innvl, "defer");
3488
3489 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3490 pair = nvlist_next_nvpair(snaps, pair)) {
3491 (void) zfs_unmount_snap(nvpair_name(pair));
3492 }
3493
3494 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3495 }
3496
3497 /*
3498 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>.
3499 * All bookmarks must be in the same pool.
3500 *
3501 * innvl: {
3502 * bookmark1 -> snapshot1, bookmark2 -> snapshot2
3503 * }
3504 *
3505 * outnvl: bookmark -> error code (int32)
3506 *
3507 */
3508 /* ARGSUSED */
3509 static int
3510 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3511 {
3512 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3513 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3514 char *snap_name;
3515
3516 /*
3517 * Verify the snapshot argument.
3518 */
3519 if (nvpair_value_string(pair, &snap_name) != 0)
3520 return (SET_ERROR(EINVAL));
3521
3522
3523 /* Verify that the keys (bookmarks) are unique */
3524 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair);
3525 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) {
3526 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0)
3527 return (SET_ERROR(EINVAL));
3528 }
3529 }
3530
3531 return (dsl_bookmark_create(innvl, outnvl));
3532 }
3533
3534 /*
3535 * innvl: {
3536 * property 1, property 2, ...
3537 * }
3538 *
3539 * outnvl: {
3540 * bookmark name 1 -> { property 1, property 2, ... },
3541 * bookmark name 2 -> { property 1, property 2, ... }
3542 * }
3543 *
3544 */
3545 static int
3546 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3547 {
3548 return (dsl_get_bookmarks(fsname, innvl, outnvl));
3549 }
3550
3551 /*
3552 * innvl: {
3553 * bookmark name 1, bookmark name 2
3554 * }
3555 *
3556 * outnvl: bookmark -> error code (int32)
3557 *
3558 */
3559 static int
3560 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl,
3561 nvlist_t *outnvl)
3562 {
3563 int error, poollen;
3564
3565 poollen = strlen(poolname);
3566 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3567 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3568 const char *name = nvpair_name(pair);
3569 const char *cp = strchr(name, '#');
3570
3571 /*
3572 * The bookmark name must contain an #, and the part after it
3573 * must contain only valid characters.
3574 */
3575 if (cp == NULL ||
3576 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3577 return (SET_ERROR(EINVAL));
3578
3579 /*
3580 * The bookmark must be in the specified pool.
3581 */
3582 if (strncmp(name, poolname, poollen) != 0 ||
3583 (name[poollen] != '/' && name[poollen] != '#'))
3584 return (SET_ERROR(EXDEV));
3585 }
3586
3587 error = dsl_bookmark_destroy(innvl, outnvl);
3588 return (error);
3589 }
3590
3591 /*
3592 * inputs:
3593 * zc_name name of dataset to destroy
3594 * zc_objset_type type of objset
3595 * zc_defer_destroy mark for deferred destroy
3596 *
3597 * outputs: none
3598 */
3599 static int
3600 zfs_ioc_destroy(zfs_cmd_t *zc)
3601 {
3602 int err;
3603
3604 if (zc->zc_objset_type == DMU_OST_ZFS) {
3605 err = zfs_unmount_snap(zc->zc_name);
3606 if (err != 0)
3607 return (err);
3608 }
3609
3610 if (strchr(zc->zc_name, '@'))
3611 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3612 else
3613 err = dsl_destroy_head(zc->zc_name);
3614 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3615 (void) zvol_remove_minor(zc->zc_name);
3616 return (err);
3617 }
3618
3619 /*
3620 * fsname is name of dataset to rollback (to most recent snapshot)
3621 *
3622 * innvl is not used.
3623 *
3624 * outnvl: "target" -> name of most recent snapshot
3625 * }
3626 */
3627 /* ARGSUSED */
3628 static int
3629 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl)
3630 {
3631 zfsvfs_t *zfsvfs;
3632 int error;
3633
3634 if (getzfsvfs(fsname, &zfsvfs) == 0) {
3635 error = zfs_suspend_fs(zfsvfs);
3636 if (error == 0) {
3637 int resume_err;
3638
3639 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl);
3640 resume_err = zfs_resume_fs(zfsvfs, fsname);
3641 error = error ? error : resume_err;
3642 }
3643 VFS_RELE(zfsvfs->z_vfs);
3644 } else {
3645 error = dsl_dataset_rollback(fsname, NULL, outnvl);
3646 }
3647 return (error);
3648 }
3649
3650 static int
3651 recursive_unmount(const char *fsname, void *arg)
3652 {
3653 const char *snapname = arg;
3654 char fullname[MAXNAMELEN];
3655
3656 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3657 return (zfs_unmount_snap(fullname));
3658 }
3659
3660 /*
3661 * inputs:
3662 * zc_name old name of dataset
3663 * zc_value new name of dataset
3664 * zc_cookie recursive flag (only valid for snapshots)
3665 *
3666 * outputs: none
3667 */
3668 static int
3669 zfs_ioc_rename(zfs_cmd_t *zc)
3670 {
3671 boolean_t recursive = zc->zc_cookie & 1;
3672 char *at;
3673
3674 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3675 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3676 strchr(zc->zc_value, '%'))
3677 return (SET_ERROR(EINVAL));
3678
3679 at = strchr(zc->zc_name, '@');
3680 if (at != NULL) {
3681 /* snaps must be in same fs */
3682 int error;
3683
3684 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3685 return (SET_ERROR(EXDEV));
3686 *at = '\0';
3687 if (zc->zc_objset_type == DMU_OST_ZFS) {
3688 error = dmu_objset_find(zc->zc_name,
3689 recursive_unmount, at + 1,
3690 recursive ? DS_FIND_CHILDREN : 0);
3691 if (error != 0) {
3692 *at = '@';
3693 return (error);
3694 }
3695 }
3696 error = dsl_dataset_rename_snapshot(zc->zc_name,
3697 at + 1, strchr(zc->zc_value, '@') + 1, recursive);
3698 *at = '@';
3699
3700 return (error);
3701 } else {
3702 if (zc->zc_objset_type == DMU_OST_ZVOL)
3703 (void) zvol_remove_minor(zc->zc_name);
3704 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3705 }
3706 }
3707
3708 static int
3709 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3710 {
3711 const char *propname = nvpair_name(pair);
3712 boolean_t issnap = (strchr(dsname, '@') != NULL);
3713 zfs_prop_t prop = zfs_name_to_prop(propname);
3714 uint64_t intval;
3715 int err;
3716
3717 if (prop == ZPROP_INVAL) {
3718 if (zfs_prop_user(propname)) {
3719 if (err = zfs_secpolicy_write_perms(dsname,
3720 ZFS_DELEG_PERM_USERPROP, cr))
3721 return (err);
3722 return (0);
3723 }
3724
3725 if (!issnap && zfs_prop_userquota(propname)) {
3726 const char *perm = NULL;
3727 const char *uq_prefix =
3728 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3729 const char *gq_prefix =
3730 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3731
3732 if (strncmp(propname, uq_prefix,
3733 strlen(uq_prefix)) == 0) {
3734 perm = ZFS_DELEG_PERM_USERQUOTA;
3735 } else if (strncmp(propname, gq_prefix,
3736 strlen(gq_prefix)) == 0) {
3737 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3738 } else {
3739 /* USERUSED and GROUPUSED are read-only */
3740 return (SET_ERROR(EINVAL));
3741 }
3742
3743 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3744 return (err);
3745 return (0);
3746 }
3747
3748 return (SET_ERROR(EINVAL));
3749 }
3750
3751 if (issnap)
3752 return (SET_ERROR(EINVAL));
3753
3754 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3755 /*
3756 * dsl_prop_get_all_impl() returns properties in this
3757 * format.
3758 */
3759 nvlist_t *attrs;
3760 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3761 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3762 &pair) == 0);
3763 }
3764
3765 /*
3766 * Check that this value is valid for this pool version
3767 */
3768 switch (prop) {
3769 case ZFS_PROP_COMPRESSION:
3770 /*
3771 * If the user specified gzip compression, make sure
3772 * the SPA supports it. We ignore any errors here since
3773 * we'll catch them later.
3774 */
3775 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3776 nvpair_value_uint64(pair, &intval) == 0) {
3777 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3778 intval <= ZIO_COMPRESS_GZIP_9 &&
3779 zfs_earlier_version(dsname,
3780 SPA_VERSION_GZIP_COMPRESSION)) {
3781 return (SET_ERROR(ENOTSUP));
3782 }
3783
3784 if (intval == ZIO_COMPRESS_ZLE &&
3785 zfs_earlier_version(dsname,
3786 SPA_VERSION_ZLE_COMPRESSION))
3787 return (SET_ERROR(ENOTSUP));
3788
3789 if (intval == ZIO_COMPRESS_LZ4) {
3790 spa_t *spa;
3791
3792 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3793 return (err);
3794
3795 if (!spa_feature_is_enabled(spa,
3796 SPA_FEATURE_LZ4_COMPRESS)) {
3797 spa_close(spa, FTAG);
3798 return (SET_ERROR(ENOTSUP));
3799 }
3800 spa_close(spa, FTAG);
3801 }
3802
3803 /*
3804 * If this is a bootable dataset then
3805 * verify that the compression algorithm
3806 * is supported for booting. We must return
3807 * something other than ENOTSUP since it
3808 * implies a downrev pool version.
3809 */
3810 if (zfs_is_bootfs(dsname) &&
3811 !BOOTFS_COMPRESS_VALID(intval)) {
3812 return (SET_ERROR(ERANGE));
3813 }
3814 }
3815 break;
3816
3817 case ZFS_PROP_COPIES:
3818 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3819 return (SET_ERROR(ENOTSUP));
3820 break;
3821
3822 case ZFS_PROP_DEDUP:
3823 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3824 return (SET_ERROR(ENOTSUP));
3825 break;
3826
3827 case ZFS_PROP_SHARESMB:
3828 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3829 return (SET_ERROR(ENOTSUP));
3830 break;
3831
3832 case ZFS_PROP_ACLINHERIT:
3833 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3834 nvpair_value_uint64(pair, &intval) == 0) {
3835 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3836 zfs_earlier_version(dsname,
3837 SPA_VERSION_PASSTHROUGH_X))
3838 return (SET_ERROR(ENOTSUP));
3839 }
3840 break;
3841 }
3842
3843 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3844 }
3845
3846 /*
3847 * Checks for a race condition to make sure we don't increment a feature flag
3848 * multiple times.
3849 */
3850 static int
3851 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
3852 {
3853 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3854 spa_feature_t *featurep = arg;
3855
3856 if (!spa_feature_is_active(spa, *featurep))
3857 return (0);
3858 else
3859 return (SET_ERROR(EBUSY));
3860 }
3861
3862 /*
3863 * The callback invoked on feature activation in the sync task caused by
3864 * zfs_prop_activate_feature.
3865 */
3866 static void
3867 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
3868 {
3869 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3870 spa_feature_t *featurep = arg;
3871
3872 spa_feature_incr(spa, *featurep, tx);
3873 }
3874
3875 /*
3876 * Activates a feature on a pool in response to a property setting. This
3877 * creates a new sync task which modifies the pool to reflect the feature
3878 * as being active.
3879 */
3880 static int
3881 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature)
3882 {
3883 int err;
3884
3885 /* EBUSY here indicates that the feature is already active */
3886 err = dsl_sync_task(spa_name(spa),
3887 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
3888 &feature, 2);
3889
3890 if (err != 0 && err != EBUSY)
3891 return (err);
3892 else
3893 return (0);
3894 }
3895
3896 /*
3897 * Removes properties from the given props list that fail permission checks
3898 * needed to clear them and to restore them in case of a receive error. For each
3899 * property, make sure we have both set and inherit permissions.
3900 *
3901 * Returns the first error encountered if any permission checks fail. If the
3902 * caller provides a non-NULL errlist, it also gives the complete list of names
3903 * of all the properties that failed a permission check along with the
3904 * corresponding error numbers. The caller is responsible for freeing the
3905 * returned errlist.
3906 *
3907 * If every property checks out successfully, zero is returned and the list
3908 * pointed at by errlist is NULL.
3909 */
3910 static int
3911 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3912 {
3913 zfs_cmd_t *zc;
3914 nvpair_t *pair, *next_pair;
3915 nvlist_t *errors;
3916 int err, rv = 0;
3917
3918 if (props == NULL)
3919 return (0);
3920
3921 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3922
3923 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3924 (void) strcpy(zc->zc_name, dataset);
3925 pair = nvlist_next_nvpair(props, NULL);
3926 while (pair != NULL) {
3927 next_pair = nvlist_next_nvpair(props, pair);
3928
3929 (void) strcpy(zc->zc_value, nvpair_name(pair));
3930 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3931 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
3932 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3933 VERIFY(nvlist_add_int32(errors,
3934 zc->zc_value, err) == 0);
3935 }
3936 pair = next_pair;
3937 }
3938 kmem_free(zc, sizeof (zfs_cmd_t));
3939
3940 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3941 nvlist_free(errors);
3942 errors = NULL;
3943 } else {
3944 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3945 }
3946
3947 if (errlist == NULL)
3948 nvlist_free(errors);
3949 else
3950 *errlist = errors;
3951
3952 return (rv);
3953 }
3954
3955 static boolean_t
3956 propval_equals(nvpair_t *p1, nvpair_t *p2)
3957 {
3958 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3959 /* dsl_prop_get_all_impl() format */
3960 nvlist_t *attrs;
3961 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3962 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3963 &p1) == 0);
3964 }
3965
3966 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3967 nvlist_t *attrs;
3968 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3969 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3970 &p2) == 0);
3971 }
3972
3973 if (nvpair_type(p1) != nvpair_type(p2))
3974 return (B_FALSE);
3975
3976 if (nvpair_type(p1) == DATA_TYPE_STRING) {
3977 char *valstr1, *valstr2;
3978
3979 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
3980 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
3981 return (strcmp(valstr1, valstr2) == 0);
3982 } else {
3983 uint64_t intval1, intval2;
3984
3985 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
3986 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
3987 return (intval1 == intval2);
3988 }
3989 }
3990
3991 /*
3992 * Remove properties from props if they are not going to change (as determined
3993 * by comparison with origprops). Remove them from origprops as well, since we
3994 * do not need to clear or restore properties that won't change.
3995 */
3996 static void
3997 props_reduce(nvlist_t *props, nvlist_t *origprops)
3998 {
3999 nvpair_t *pair, *next_pair;
4000
4001 if (origprops == NULL)
4002 return; /* all props need to be received */
4003
4004 pair = nvlist_next_nvpair(props, NULL);
4005 while (pair != NULL) {
4006 const char *propname = nvpair_name(pair);
4007 nvpair_t *match;
4008
4009 next_pair = nvlist_next_nvpair(props, pair);
4010
4011 if ((nvlist_lookup_nvpair(origprops, propname,
4012 &match) != 0) || !propval_equals(pair, match))
4013 goto next; /* need to set received value */
4014
4015 /* don't clear the existing received value */
4016 (void) nvlist_remove_nvpair(origprops, match);
4017 /* don't bother receiving the property */
4018 (void) nvlist_remove_nvpair(props, pair);
4019 next:
4020 pair = next_pair;
4021 }
4022 }
4023
4024 #ifdef DEBUG
4025 static boolean_t zfs_ioc_recv_inject_err;
4026 #endif
4027
4028 /*
4029 * inputs:
4030 * zc_name name of containing filesystem
4031 * zc_nvlist_src{_size} nvlist of properties to apply
4032 * zc_value name of snapshot to create
4033 * zc_string name of clone origin (if DRR_FLAG_CLONE)
4034 * zc_cookie file descriptor to recv from
4035 * zc_begin_record the BEGIN record of the stream (not byteswapped)
4036 * zc_guid force flag
4037 * zc_cleanup_fd cleanup-on-exit file descriptor
4038 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
4039 *
4040 * outputs:
4041 * zc_cookie number of bytes read
4042 * zc_nvlist_dst{_size} error for each unapplied received property
4043 * zc_obj zprop_errflags_t
4044 * zc_action_handle handle for this guid/ds mapping
4045 */
4046 static int
4047 zfs_ioc_recv(zfs_cmd_t *zc)
4048 {
4049 file_t *fp;
4050 dmu_recv_cookie_t drc;
4051 boolean_t force = (boolean_t)zc->zc_guid;
4052 int fd;
4053 int error = 0;
4054 int props_error = 0;
4055 nvlist_t *errors;
4056 offset_t off;
4057 nvlist_t *props = NULL; /* sent properties */
4058 nvlist_t *origprops = NULL; /* existing properties */
4059 char *origin = NULL;
4060 char *tosnap;
4061 char tofs[ZFS_MAXNAMELEN];
4062 boolean_t first_recvd_props = B_FALSE;
4063
4064 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
4065 strchr(zc->zc_value, '@') == NULL ||
4066 strchr(zc->zc_value, '%'))
4067 return (SET_ERROR(EINVAL));
4068
4069 (void) strcpy(tofs, zc->zc_value);
4070 tosnap = strchr(tofs, '@');
4071 *tosnap++ = '\0';
4072
4073 if (zc->zc_nvlist_src != NULL &&
4074 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
4075 zc->zc_iflags, &props)) != 0)
4076 return (error);
4077
4078 fd = zc->zc_cookie;
4079 fp = getf(fd);
4080 if (fp == NULL) {
4081 nvlist_free(props);
4082 return (SET_ERROR(EBADF));
4083 }
4084
4085 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4086
4087 if (zc->zc_string[0])
4088 origin = zc->zc_string;
4089
4090 error = dmu_recv_begin(tofs, tosnap,
4091 &zc->zc_begin_record, force, origin, &drc);
4092 if (error != 0)
4093 goto out;
4094
4095 /*
4096 * Set properties before we receive the stream so that they are applied
4097 * to the new data. Note that we must call dmu_recv_stream() if
4098 * dmu_recv_begin() succeeds.
4099 */
4100 if (props != NULL && !drc.drc_newfs) {
4101 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
4102 SPA_VERSION_RECVD_PROPS &&
4103 !dsl_prop_get_hasrecvd(tofs))
4104 first_recvd_props = B_TRUE;
4105
4106 /*
4107 * If new received properties are supplied, they are to
4108 * completely replace the existing received properties, so stash
4109 * away the existing ones.
4110 */
4111 if (dsl_prop_get_received(tofs, &origprops) == 0) {
4112 nvlist_t *errlist = NULL;
4113 /*
4114 * Don't bother writing a property if its value won't
4115 * change (and avoid the unnecessary security checks).
4116 *
4117 * The first receive after SPA_VERSION_RECVD_PROPS is a
4118 * special case where we blow away all local properties
4119 * regardless.
4120 */
4121 if (!first_recvd_props)
4122 props_reduce(props, origprops);
4123 if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
4124 (void) nvlist_merge(errors, errlist, 0);
4125 nvlist_free(errlist);
4126
4127 if (clear_received_props(tofs, origprops,
4128 first_recvd_props ? NULL : props) != 0)
4129 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4130 } else {
4131 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4132 }
4133 }
4134
4135 if (props != NULL) {
4136 props_error = dsl_prop_set_hasrecvd(tofs);
4137
4138 if (props_error == 0) {
4139 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4140 props, errors);
4141 }
4142 }
4143
4144 if (zc->zc_nvlist_dst_size != 0 &&
4145 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4146 put_nvlist(zc, errors) != 0)) {
4147 /*
4148 * Caller made zc->zc_nvlist_dst less than the minimum expected
4149 * size or supplied an invalid address.
4150 */
4151 props_error = SET_ERROR(EINVAL);
4152 }
4153
4154 off = fp->f_offset;
4155 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4156 &zc->zc_action_handle);
4157
4158 if (error == 0) {
4159 zfsvfs_t *zfsvfs = NULL;
4160
4161 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4162 /* online recv */
4163 int end_err;
4164
4165 error = zfs_suspend_fs(zfsvfs);
4166 /*
4167 * If the suspend fails, then the recv_end will
4168 * likely also fail, and clean up after itself.
4169 */
4170 end_err = dmu_recv_end(&drc, zfsvfs);
4171 if (error == 0)
4172 error = zfs_resume_fs(zfsvfs, tofs);
4173 error = error ? error : end_err;
4174 VFS_RELE(zfsvfs->z_vfs);
4175 } else {
4176 error = dmu_recv_end(&drc, NULL);
4177 }
4178 }
4179
4180 zc->zc_cookie = off - fp->f_offset;
4181 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4182 fp->f_offset = off;
4183
4184 #ifdef DEBUG
4185 if (zfs_ioc_recv_inject_err) {
4186 zfs_ioc_recv_inject_err = B_FALSE;
4187 error = 1;
4188 }
4189 #endif
4190 /*
4191 * On error, restore the original props.
4192 */
4193 if (error != 0 && props != NULL && !drc.drc_newfs) {
4194 if (clear_received_props(tofs, props, NULL) != 0) {
4195 /*
4196 * We failed to clear the received properties.
4197 * Since we may have left a $recvd value on the
4198 * system, we can't clear the $hasrecvd flag.
4199 */
4200 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4201 } else if (first_recvd_props) {
4202 dsl_prop_unset_hasrecvd(tofs);
4203 }
4204
4205 if (origprops == NULL && !drc.drc_newfs) {
4206 /* We failed to stash the original properties. */
4207 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4208 }
4209
4210 /*
4211 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4212 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4213 * explictly if we're restoring local properties cleared in the
4214 * first new-style receive.
4215 */
4216 if (origprops != NULL &&
4217 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4218 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4219 origprops, NULL) != 0) {
4220 /*
4221 * We stashed the original properties but failed to
4222 * restore them.
4223 */
4224 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4225 }
4226 }
4227 out:
4228 nvlist_free(props);
4229 nvlist_free(origprops);
4230 nvlist_free(errors);
4231 releasef(fd);
4232
4233 if (error == 0)
4234 error = props_error;
4235
4236 return (error);
4237 }
4238
4239 /*
4240 * inputs:
4241 * zc_name name of snapshot to send
4242 * zc_cookie file descriptor to send stream to
4243 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4244 * zc_sendobj objsetid of snapshot to send
4245 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4246 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4247 * output size in zc_objset_type.
4248 *
4249 * outputs:
4250 * zc_objset_type estimated size, if zc_guid is set
4251 */
4252 static int
4253 zfs_ioc_send(zfs_cmd_t *zc)
4254 {
4255 int error;
4256 offset_t off;
4257 boolean_t estimate = (zc->zc_guid != 0);
4258
4259 if (zc->zc_obj != 0) {
4260 dsl_pool_t *dp;
4261 dsl_dataset_t *tosnap;
4262
4263 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4264 if (error != 0)
4265 return (error);
4266
4267 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4268 if (error != 0) {
4269 dsl_pool_rele(dp, FTAG);
4270 return (error);
4271 }
4272
4273 if (dsl_dir_is_clone(tosnap->ds_dir))
4274 zc->zc_fromobj = tosnap->ds_dir->dd_phys->dd_origin_obj;
4275 dsl_dataset_rele(tosnap, FTAG);
4276 dsl_pool_rele(dp, FTAG);
4277 }
4278
4279 if (estimate) {
4280 dsl_pool_t *dp;
4281 dsl_dataset_t *tosnap;
4282 dsl_dataset_t *fromsnap = NULL;
4283
4284 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4285 if (error != 0)
4286 return (error);
4287
4288 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4289 if (error != 0) {
4290 dsl_pool_rele(dp, FTAG);
4291 return (error);
4292 }
4293
4294 if (zc->zc_fromobj != 0) {
4295 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4296 FTAG, &fromsnap);
4297 if (error != 0) {
4298 dsl_dataset_rele(tosnap, FTAG);
4299 dsl_pool_rele(dp, FTAG);
4300 return (error);
4301 }
4302 }
4303
4304 error = dmu_send_estimate(tosnap, fromsnap,
4305 &zc->zc_objset_type);
4306
4307 if (fromsnap != NULL)
4308 dsl_dataset_rele(fromsnap, FTAG);
4309 dsl_dataset_rele(tosnap, FTAG);
4310 dsl_pool_rele(dp, FTAG);
4311 } else {
4312 file_t *fp = getf(zc->zc_cookie);
4313 if (fp == NULL)
4314 return (SET_ERROR(EBADF));
4315
4316 off = fp->f_offset;
4317 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4318 zc->zc_fromobj, zc->zc_cookie, fp->f_vnode, &off);
4319
4320 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4321 fp->f_offset = off;
4322 releasef(zc->zc_cookie);
4323 }
4324 return (error);
4325 }
4326
4327 /*
4328 * inputs:
4329 * zc_name name of snapshot on which to report progress
4330 * zc_cookie file descriptor of send stream
4331 *
4332 * outputs:
4333 * zc_cookie number of bytes written in send stream thus far
4334 */
4335 static int
4336 zfs_ioc_send_progress(zfs_cmd_t *zc)
4337 {
4338 dsl_pool_t *dp;
4339 dsl_dataset_t *ds;
4340 dmu_sendarg_t *dsp = NULL;
4341 int error;
4342
4343 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4344 if (error != 0)
4345 return (error);
4346
4347 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4348 if (error != 0) {
4349 dsl_pool_rele(dp, FTAG);
4350 return (error);
4351 }
4352
4353 mutex_enter(&ds->ds_sendstream_lock);
4354
4355 /*
4356 * Iterate over all the send streams currently active on this dataset.
4357 * If there's one which matches the specified file descriptor _and_ the
4358 * stream was started by the current process, return the progress of
4359 * that stream.
4360 */
4361 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4362 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4363 if (dsp->dsa_outfd == zc->zc_cookie &&
4364 dsp->dsa_proc == curproc)
4365 break;
4366 }
4367
4368 if (dsp != NULL)
4369 zc->zc_cookie = *(dsp->dsa_off);
4370 else
4371 error = SET_ERROR(ENOENT);
4372
4373 mutex_exit(&ds->ds_sendstream_lock);
4374 dsl_dataset_rele(ds, FTAG);
4375 dsl_pool_rele(dp, FTAG);
4376 return (error);
4377 }
4378
4379 static int
4380 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4381 {
4382 int id, error;
4383
4384 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4385 &zc->zc_inject_record);
4386
4387 if (error == 0)
4388 zc->zc_guid = (uint64_t)id;
4389
4390 return (error);
4391 }
4392
4393 static int
4394 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4395 {
4396 return (zio_clear_fault((int)zc->zc_guid));
4397 }
4398
4399 static int
4400 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4401 {
4402 int id = (int)zc->zc_guid;
4403 int error;
4404
4405 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4406 &zc->zc_inject_record);
4407
4408 zc->zc_guid = id;
4409
4410 return (error);
4411 }
4412
4413 static int
4414 zfs_ioc_error_log(zfs_cmd_t *zc)
4415 {
4416 spa_t *spa;
4417 int error;
4418 size_t count = (size_t)zc->zc_nvlist_dst_size;
4419
4420 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4421 return (error);
4422
4423 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4424 &count);
4425 if (error == 0)
4426 zc->zc_nvlist_dst_size = count;
4427 else
4428 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4429
4430 spa_close(spa, FTAG);
4431
4432 return (error);
4433 }
4434
4435 static int
4436 zfs_ioc_clear(zfs_cmd_t *zc)
4437 {
4438 spa_t *spa;
4439 vdev_t *vd;
4440 int error;
4441
4442 /*
4443 * On zpool clear we also fix up missing slogs
4444 */
4445 mutex_enter(&spa_namespace_lock);
4446 spa = spa_lookup(zc->zc_name);
4447 if (spa == NULL) {
4448 mutex_exit(&spa_namespace_lock);
4449 return (SET_ERROR(EIO));
4450 }
4451 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4452 /* we need to let spa_open/spa_load clear the chains */
4453 spa_set_log_state(spa, SPA_LOG_CLEAR);
4454 }
4455 spa->spa_last_open_failed = 0;
4456 mutex_exit(&spa_namespace_lock);
4457
4458 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4459 error = spa_open(zc->zc_name, &spa, FTAG);
4460 } else {
4461 nvlist_t *policy;
4462 nvlist_t *config = NULL;
4463
4464 if (zc->zc_nvlist_src == NULL)
4465 return (SET_ERROR(EINVAL));
4466
4467 if ((error = get_nvlist(zc->zc_nvlist_src,
4468 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4469 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4470 policy, &config);
4471 if (config != NULL) {
4472 int err;
4473
4474 if ((err = put_nvlist(zc, config)) != 0)
4475 error = err;
4476 nvlist_free(config);
4477 }
4478 nvlist_free(policy);
4479 }
4480 }
4481
4482 if (error != 0)
4483 return (error);
4484
4485 spa_vdev_state_enter(spa, SCL_NONE);
4486
4487 if (zc->zc_guid == 0) {
4488 vd = NULL;
4489 } else {
4490 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4491 if (vd == NULL) {
4492 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4493 spa_close(spa, FTAG);
4494 return (SET_ERROR(ENODEV));
4495 }
4496 }
4497
4498 vdev_clear(spa, vd);
4499
4500 (void) spa_vdev_state_exit(spa, NULL, 0);
4501
4502 /*
4503 * Resume any suspended I/Os.
4504 */
4505 if (zio_resume(spa) != 0)
4506 error = SET_ERROR(EIO);
4507
4508 spa_close(spa, FTAG);
4509
4510 return (error);
4511 }
4512
4513 static int
4514 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4515 {
4516 spa_t *spa;
4517 int error;
4518
4519 error = spa_open(zc->zc_name, &spa, FTAG);
4520 if (error != 0)
4521 return (error);
4522
4523 spa_vdev_state_enter(spa, SCL_NONE);
4524
4525 /*
4526 * If a resilver is already in progress then set the
4527 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4528 * the scan as a side effect of the reopen. Otherwise, let
4529 * vdev_open() decided if a resilver is required.
4530 */
4531 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4532 vdev_reopen(spa->spa_root_vdev);
4533 spa->spa_scrub_reopen = B_FALSE;
4534
4535 (void) spa_vdev_state_exit(spa, NULL, 0);
4536 spa_close(spa, FTAG);
4537 return (0);
4538 }
4539 /*
4540 * inputs:
4541 * zc_name name of filesystem
4542 * zc_value name of origin snapshot
4543 *
4544 * outputs:
4545 * zc_string name of conflicting snapshot, if there is one
4546 */
4547 static int
4548 zfs_ioc_promote(zfs_cmd_t *zc)
4549 {
4550 char *cp;
4551
4552 /*
4553 * We don't need to unmount *all* the origin fs's snapshots, but
4554 * it's easier.
4555 */
4556 cp = strchr(zc->zc_value, '@');
4557 if (cp)
4558 *cp = '\0';
4559 (void) dmu_objset_find(zc->zc_value,
4560 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4561 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4562 }
4563
4564 /*
4565 * Retrieve a single {user|group}{used|quota}@... property.
4566 *
4567 * inputs:
4568 * zc_name name of filesystem
4569 * zc_objset_type zfs_userquota_prop_t
4570 * zc_value domain name (eg. "S-1-234-567-89")
4571 * zc_guid RID/UID/GID
4572 *
4573 * outputs:
4574 * zc_cookie property value
4575 */
4576 static int
4577 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4578 {
4579 zfsvfs_t *zfsvfs;
4580 int error;
4581
4582 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4583 return (SET_ERROR(EINVAL));
4584
4585 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4586 if (error != 0)
4587 return (error);
4588
4589 error = zfs_userspace_one(zfsvfs,
4590 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4591 zfsvfs_rele(zfsvfs, FTAG);
4592
4593 return (error);
4594 }
4595
4596 /*
4597 * inputs:
4598 * zc_name name of filesystem
4599 * zc_cookie zap cursor
4600 * zc_objset_type zfs_userquota_prop_t
4601 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4602 *
4603 * outputs:
4604 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4605 * zc_cookie zap cursor
4606 */
4607 static int
4608 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4609 {
4610 zfsvfs_t *zfsvfs;
4611 int bufsize = zc->zc_nvlist_dst_size;
4612
4613 if (bufsize <= 0)
4614 return (SET_ERROR(ENOMEM));
4615
4616 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4617 if (error != 0)
4618 return (error);
4619
4620 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4621
4622 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4623 buf, &zc->zc_nvlist_dst_size);
4624
4625 if (error == 0) {
4626 error = xcopyout(buf,
4627 (void *)(uintptr_t)zc->zc_nvlist_dst,
4628 zc->zc_nvlist_dst_size);
4629 }
4630 kmem_free(buf, bufsize);
4631 zfsvfs_rele(zfsvfs, FTAG);
4632
4633 return (error);
4634 }
4635
4636 /*
4637 * inputs:
4638 * zc_name name of filesystem
4639 *
4640 * outputs:
4641 * none
4642 */
4643 static int
4644 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4645 {
4646 objset_t *os;
4647 int error = 0;
4648 zfsvfs_t *zfsvfs;
4649
4650 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4651 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4652 /*
4653 * If userused is not enabled, it may be because the
4654 * objset needs to be closed & reopened (to grow the
4655 * objset_phys_t). Suspend/resume the fs will do that.
4656 */
4657 error = zfs_suspend_fs(zfsvfs);
4658 if (error == 0) {
4659 dmu_objset_refresh_ownership(zfsvfs->z_os,
4660 zfsvfs);
4661 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4662 }
4663 }
4664 if (error == 0)
4665 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4666 VFS_RELE(zfsvfs->z_vfs);
4667 } else {
4668 /* XXX kind of reading contents without owning */
4669 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4670 if (error != 0)
4671 return (error);
4672
4673 error = dmu_objset_userspace_upgrade(os);
4674 dmu_objset_rele(os, FTAG);
4675 }
4676
4677 return (error);
4678 }
4679
4680 /*
4681 * We don't want to have a hard dependency
4682 * against some special symbols in sharefs
4683 * nfs, and smbsrv. Determine them if needed when
4684 * the first file system is shared.
4685 * Neither sharefs, nfs or smbsrv are unloadable modules.
4686 */
4687 int (*znfsexport_fs)(void *arg);
4688 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4689 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4690
4691 int zfs_nfsshare_inited;
4692 int zfs_smbshare_inited;
4693
4694 ddi_modhandle_t nfs_mod;
4695 ddi_modhandle_t sharefs_mod;
4696 ddi_modhandle_t smbsrv_mod;
4697 kmutex_t zfs_share_lock;
4698
4699 static int
4700 zfs_init_sharefs()
4701 {
4702 int error;
4703
4704 ASSERT(MUTEX_HELD(&zfs_share_lock));
4705 /* Both NFS and SMB shares also require sharetab support. */
4706 if (sharefs_mod == NULL && ((sharefs_mod =
4707 ddi_modopen("fs/sharefs",
4708 KRTLD_MODE_FIRST, &error)) == NULL)) {
4709 return (SET_ERROR(ENOSYS));
4710 }
4711 if (zshare_fs == NULL && ((zshare_fs =
4712 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4713 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4714 return (SET_ERROR(ENOSYS));
4715 }
4716 return (0);
4717 }
4718
4719 static int
4720 zfs_ioc_share(zfs_cmd_t *zc)
4721 {
4722 int error;
4723 int opcode;
4724
4725 switch (zc->zc_share.z_sharetype) {
4726 case ZFS_SHARE_NFS:
4727 case ZFS_UNSHARE_NFS:
4728 if (zfs_nfsshare_inited == 0) {
4729 mutex_enter(&zfs_share_lock);
4730 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4731 KRTLD_MODE_FIRST, &error)) == NULL)) {
4732 mutex_exit(&zfs_share_lock);
4733 return (SET_ERROR(ENOSYS));
4734 }
4735 if (znfsexport_fs == NULL &&
4736 ((znfsexport_fs = (int (*)(void *))
4737 ddi_modsym(nfs_mod,
4738 "nfs_export", &error)) == NULL)) {
4739 mutex_exit(&zfs_share_lock);
4740 return (SET_ERROR(ENOSYS));
4741 }
4742 error = zfs_init_sharefs();
4743 if (error != 0) {
4744 mutex_exit(&zfs_share_lock);
4745 return (SET_ERROR(ENOSYS));
4746 }
4747 zfs_nfsshare_inited = 1;
4748 mutex_exit(&zfs_share_lock);
4749 }
4750 break;
4751 case ZFS_SHARE_SMB:
4752 case ZFS_UNSHARE_SMB:
4753 if (zfs_smbshare_inited == 0) {
4754 mutex_enter(&zfs_share_lock);
4755 if (smbsrv_mod == NULL && ((smbsrv_mod =
4756 ddi_modopen("drv/smbsrv",
4757 KRTLD_MODE_FIRST, &error)) == NULL)) {
4758 mutex_exit(&zfs_share_lock);
4759 return (SET_ERROR(ENOSYS));
4760 }
4761 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4762 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4763 "smb_server_share", &error)) == NULL)) {
4764 mutex_exit(&zfs_share_lock);
4765 return (SET_ERROR(ENOSYS));
4766 }
4767 error = zfs_init_sharefs();
4768 if (error != 0) {
4769 mutex_exit(&zfs_share_lock);
4770 return (SET_ERROR(ENOSYS));
4771 }
4772 zfs_smbshare_inited = 1;
4773 mutex_exit(&zfs_share_lock);
4774 }
4775 break;
4776 default:
4777 return (SET_ERROR(EINVAL));
4778 }
4779
4780 switch (zc->zc_share.z_sharetype) {
4781 case ZFS_SHARE_NFS:
4782 case ZFS_UNSHARE_NFS:
4783 if (error =
4784 znfsexport_fs((void *)
4785 (uintptr_t)zc->zc_share.z_exportdata))
4786 return (error);
4787 break;
4788 case ZFS_SHARE_SMB:
4789 case ZFS_UNSHARE_SMB:
4790 if (error = zsmbexport_fs((void *)
4791 (uintptr_t)zc->zc_share.z_exportdata,
4792 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4793 B_TRUE: B_FALSE)) {
4794 return (error);
4795 }
4796 break;
4797 }
4798
4799 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4800 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4801 SHAREFS_ADD : SHAREFS_REMOVE;
4802
4803 /*
4804 * Add or remove share from sharetab
4805 */
4806 error = zshare_fs(opcode,
4807 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4808 zc->zc_share.z_sharemax);
4809
4810 return (error);
4811
4812 }
4813
4814 ace_t full_access[] = {
4815 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4816 };
4817
4818 /*
4819 * inputs:
4820 * zc_name name of containing filesystem
4821 * zc_obj object # beyond which we want next in-use object #
4822 *
4823 * outputs:
4824 * zc_obj next in-use object #
4825 */
4826 static int
4827 zfs_ioc_next_obj(zfs_cmd_t *zc)
4828 {
4829 objset_t *os = NULL;
4830 int error;
4831
4832 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4833 if (error != 0)
4834 return (error);
4835
4836 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4837 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4838
4839 dmu_objset_rele(os, FTAG);
4840 return (error);
4841 }
4842
4843 /*
4844 * inputs:
4845 * zc_name name of filesystem
4846 * zc_value prefix name for snapshot
4847 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4848 *
4849 * outputs:
4850 * zc_value short name of new snapshot
4851 */
4852 static int
4853 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4854 {
4855 char *snap_name;
4856 char *hold_name;
4857 int error;
4858 minor_t minor;
4859
4860 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
4861 if (error != 0)
4862 return (error);
4863
4864 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
4865 (u_longlong_t)ddi_get_lbolt64());
4866 hold_name = kmem_asprintf("%%%s", zc->zc_value);
4867
4868 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
4869 hold_name);
4870 if (error == 0)
4871 (void) strcpy(zc->zc_value, snap_name);
4872 strfree(snap_name);
4873 strfree(hold_name);
4874 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
4875 return (error);
4876 }
4877
4878 /*
4879 * inputs:
4880 * zc_name name of "to" snapshot
4881 * zc_value name of "from" snapshot
4882 * zc_cookie file descriptor to write diff data on
4883 *
4884 * outputs:
4885 * dmu_diff_record_t's to the file descriptor
4886 */
4887 static int
4888 zfs_ioc_diff(zfs_cmd_t *zc)
4889 {
4890 file_t *fp;
4891 offset_t off;
4892 int error;
4893
4894 fp = getf(zc->zc_cookie);
4895 if (fp == NULL)
4896 return (SET_ERROR(EBADF));
4897
4898 off = fp->f_offset;
4899
4900 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
4901
4902 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4903 fp->f_offset = off;
4904 releasef(zc->zc_cookie);
4905
4906 return (error);
4907 }
4908
4909 /*
4910 * Remove all ACL files in shares dir
4911 */
4912 static int
4913 zfs_smb_acl_purge(znode_t *dzp)
4914 {
4915 zap_cursor_t zc;
4916 zap_attribute_t zap;
4917 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4918 int error;
4919
4920 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4921 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4922 zap_cursor_advance(&zc)) {
4923 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4924 NULL, 0)) != 0)
4925 break;
4926 }
4927 zap_cursor_fini(&zc);
4928 return (error);
4929 }
4930
4931 static int
4932 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4933 {
4934 vnode_t *vp;
4935 znode_t *dzp;
4936 vnode_t *resourcevp = NULL;
4937 znode_t *sharedir;
4938 zfsvfs_t *zfsvfs;
4939 nvlist_t *nvlist;
4940 char *src, *target;
4941 vattr_t vattr;
4942 vsecattr_t vsec;
4943 int error = 0;
4944
4945 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4946 NO_FOLLOW, NULL, &vp)) != 0)
4947 return (error);
4948
4949 /* Now make sure mntpnt and dataset are ZFS */
4950
4951 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4952 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4953 zc->zc_name) != 0)) {
4954 VN_RELE(vp);
4955 return (SET_ERROR(EINVAL));
4956 }
4957
4958 dzp = VTOZ(vp);
4959 zfsvfs = dzp->z_zfsvfs;
4960 ZFS_ENTER(zfsvfs);
4961
4962 /*
4963 * Create share dir if its missing.
4964 */
4965 mutex_enter(&zfsvfs->z_lock);
4966 if (zfsvfs->z_shares_dir == 0) {
4967 dmu_tx_t *tx;
4968
4969 tx = dmu_tx_create(zfsvfs->z_os);
4970 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
4971 ZFS_SHARES_DIR);
4972 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
4973 error = dmu_tx_assign(tx, TXG_WAIT);
4974 if (error != 0) {
4975 dmu_tx_abort(tx);
4976 } else {
4977 error = zfs_create_share_dir(zfsvfs, tx);
4978 dmu_tx_commit(tx);
4979 }
4980 if (error != 0) {
4981 mutex_exit(&zfsvfs->z_lock);
4982 VN_RELE(vp);
4983 ZFS_EXIT(zfsvfs);
4984 return (error);
4985 }
4986 }
4987 mutex_exit(&zfsvfs->z_lock);
4988
4989 ASSERT(zfsvfs->z_shares_dir);
4990 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
4991 VN_RELE(vp);
4992 ZFS_EXIT(zfsvfs);
4993 return (error);
4994 }
4995
4996 switch (zc->zc_cookie) {
4997 case ZFS_SMB_ACL_ADD:
4998 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
4999 vattr.va_type = VREG;
5000 vattr.va_mode = S_IFREG|0777;
5001 vattr.va_uid = 0;
5002 vattr.va_gid = 0;
5003
5004 vsec.vsa_mask = VSA_ACE;
5005 vsec.vsa_aclentp = &full_access;
5006 vsec.vsa_aclentsz = sizeof (full_access);
5007 vsec.vsa_aclcnt = 1;
5008
5009 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
5010 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
5011 if (resourcevp)
5012 VN_RELE(resourcevp);
5013 break;
5014
5015 case ZFS_SMB_ACL_REMOVE:
5016 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
5017 NULL, 0);
5018 break;
5019
5020 case ZFS_SMB_ACL_RENAME:
5021 if ((error = get_nvlist(zc->zc_nvlist_src,
5022 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
5023 VN_RELE(vp);
5024 ZFS_EXIT(zfsvfs);
5025 return (error);
5026 }
5027 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
5028 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
5029 &target)) {
5030 VN_RELE(vp);
5031 VN_RELE(ZTOV(sharedir));
5032 ZFS_EXIT(zfsvfs);
5033 nvlist_free(nvlist);
5034 return (error);
5035 }
5036 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
5037 kcred, NULL, 0);
5038 nvlist_free(nvlist);
5039 break;
5040
5041 case ZFS_SMB_ACL_PURGE:
5042 error = zfs_smb_acl_purge(sharedir);
5043 break;
5044
5045 default:
5046 error = SET_ERROR(EINVAL);
5047 break;
5048 }
5049
5050 VN_RELE(vp);
5051 VN_RELE(ZTOV(sharedir));
5052
5053 ZFS_EXIT(zfsvfs);
5054
5055 return (error);
5056 }
5057
5058 /*
5059 * innvl: {
5060 * "holds" -> { snapname -> holdname (string), ... }
5061 * (optional) "cleanup_fd" -> fd (int32)
5062 * }
5063 *
5064 * outnvl: {
5065 * snapname -> error value (int32)
5066 * ...
5067 * }
5068 */
5069 /* ARGSUSED */
5070 static int
5071 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
5072 {
5073 nvlist_t *holds;
5074 int cleanup_fd = -1;
5075 int error;
5076 minor_t minor = 0;
5077
5078 error = nvlist_lookup_nvlist(args, "holds", &holds);
5079 if (error != 0)
5080 return (SET_ERROR(EINVAL));
5081
5082 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
5083 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
5084 if (error != 0)
5085 return (error);
5086 }
5087
5088 error = dsl_dataset_user_hold(holds, minor, errlist);
5089 if (minor != 0)
5090 zfs_onexit_fd_rele(cleanup_fd);
5091 return (error);
5092 }
5093
5094 /*
5095 * innvl is not used.
5096 *
5097 * outnvl: {
5098 * holdname -> time added (uint64 seconds since epoch)
5099 * ...
5100 * }
5101 */
5102 /* ARGSUSED */
5103 static int
5104 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
5105 {
5106 return (dsl_dataset_get_holds(snapname, outnvl));
5107 }
5108
5109 /*
5110 * innvl: {
5111 * snapname -> { holdname, ... }
5112 * ...
5113 * }
5114 *
5115 * outnvl: {
5116 * snapname -> error value (int32)
5117 * ...
5118 * }
5119 */
5120 /* ARGSUSED */
5121 static int
5122 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
5123 {
5124 return (dsl_dataset_user_release(holds, errlist));
5125 }
5126
5127 /*
5128 * inputs:
5129 * zc_name name of new filesystem or snapshot
5130 * zc_value full name of old snapshot
5131 *
5132 * outputs:
5133 * zc_cookie space in bytes
5134 * zc_objset_type compressed space in bytes
5135 * zc_perm_action uncompressed space in bytes
5136 */
5137 static int
5138 zfs_ioc_space_written(zfs_cmd_t *zc)
5139 {
5140 int error;
5141 dsl_pool_t *dp;
5142 dsl_dataset_t *new, *old;
5143
5144 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5145 if (error != 0)
5146 return (error);
5147 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5148 if (error != 0) {
5149 dsl_pool_rele(dp, FTAG);
5150 return (error);
5151 }
5152 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5153 if (error != 0) {
5154 dsl_dataset_rele(new, FTAG);
5155 dsl_pool_rele(dp, FTAG);
5156 return (error);
5157 }
5158
5159 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5160 &zc->zc_objset_type, &zc->zc_perm_action);
5161 dsl_dataset_rele(old, FTAG);
5162 dsl_dataset_rele(new, FTAG);
5163 dsl_pool_rele(dp, FTAG);
5164 return (error);
5165 }
5166
5167 /*
5168 * innvl: {
5169 * "firstsnap" -> snapshot name
5170 * }
5171 *
5172 * outnvl: {
5173 * "used" -> space in bytes
5174 * "compressed" -> compressed space in bytes
5175 * "uncompressed" -> uncompressed space in bytes
5176 * }
5177 */
5178 static int
5179 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5180 {
5181 int error;
5182 dsl_pool_t *dp;
5183 dsl_dataset_t *new, *old;
5184 char *firstsnap;
5185 uint64_t used, comp, uncomp;
5186
5187 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5188 return (SET_ERROR(EINVAL));
5189
5190 error = dsl_pool_hold(lastsnap, FTAG, &dp);
5191 if (error != 0)
5192 return (error);
5193
5194 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5195 if (error != 0) {
5196 dsl_pool_rele(dp, FTAG);
5197 return (error);
5198 }
5199 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5200 if (error != 0) {
5201 dsl_dataset_rele(new, FTAG);
5202 dsl_pool_rele(dp, FTAG);
5203 return (error);
5204 }
5205
5206 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5207 dsl_dataset_rele(old, FTAG);
5208 dsl_dataset_rele(new, FTAG);
5209 dsl_pool_rele(dp, FTAG);
5210 fnvlist_add_uint64(outnvl, "used", used);
5211 fnvlist_add_uint64(outnvl, "compressed", comp);
5212 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5213 return (error);
5214 }
5215
5216 /*
5217 * innvl: {
5218 * "fd" -> file descriptor to write stream to (int32)
5219 * (optional) "fromsnap" -> full snap name to send an incremental from
5220 * }
5221 *
5222 * outnvl is unused
5223 */
5224 /* ARGSUSED */
5225 static int
5226 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5227 {
5228 int error;
5229 offset_t off;
5230 char *fromname = NULL;
5231 int fd;
5232
5233 error = nvlist_lookup_int32(innvl, "fd", &fd);
5234 if (error != 0)
5235 return (SET_ERROR(EINVAL));
5236
5237 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5238
5239 file_t *fp = getf(fd);
5240 if (fp == NULL)
5241 return (SET_ERROR(EBADF));
5242
5243 off = fp->f_offset;
5244 error = dmu_send(snapname, fromname, fd, fp->f_vnode, &off);
5245
5246 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5247 fp->f_offset = off;
5248 releasef(fd);
5249 return (error);
5250 }
5251
5252 /*
5253 * Determine approximately how large a zfs send stream will be -- the number
5254 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5255 *
5256 * innvl: {
5257 * (optional) "fromsnap" -> full snap name to send an incremental from
5258 * }
5259 *
5260 * outnvl: {
5261 * "space" -> bytes of space (uint64)
5262 * }
5263 */
5264 static int
5265 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5266 {
5267 dsl_pool_t *dp;
5268 dsl_dataset_t *fromsnap = NULL;
5269 dsl_dataset_t *tosnap;
5270 int error;
5271 char *fromname;
5272 uint64_t space;
5273
5274 error = dsl_pool_hold(snapname, FTAG, &dp);
5275 if (error != 0)
5276 return (error);
5277
5278 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5279 if (error != 0) {
5280 dsl_pool_rele(dp, FTAG);
5281 return (error);
5282 }
5283
5284 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5285 if (error == 0) {
5286 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5287 if (error != 0) {
5288 dsl_dataset_rele(tosnap, FTAG);
5289 dsl_pool_rele(dp, FTAG);
5290 return (error);
5291 }
5292 }
5293
5294 error = dmu_send_estimate(tosnap, fromsnap, &space);
5295 fnvlist_add_uint64(outnvl, "space", space);
5296
5297 if (fromsnap != NULL)
5298 dsl_dataset_rele(fromsnap, FTAG);
5299 dsl_dataset_rele(tosnap, FTAG);
5300 dsl_pool_rele(dp, FTAG);
5301 return (error);
5302 }
5303
5304
5305 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5306
5307 static void
5308 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5309 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5310 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5311 {
5312 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5313
5314 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5315 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5316 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5317 ASSERT3P(vec->zvec_func, ==, NULL);
5318
5319 vec->zvec_legacy_func = func;
5320 vec->zvec_secpolicy = secpolicy;
5321 vec->zvec_namecheck = namecheck;
5322 vec->zvec_allow_log = log_history;
5323 vec->zvec_pool_check = pool_check;
5324 }
5325
5326 /*
5327 * See the block comment at the beginning of this file for details on
5328 * each argument to this function.
5329 */
5330 static void
5331 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5332 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5333 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5334 boolean_t allow_log)
5335 {
5336 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5337
5338 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5339 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5340 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5341 ASSERT3P(vec->zvec_func, ==, NULL);
5342
5343 /* if we are logging, the name must be valid */
5344 ASSERT(!allow_log || namecheck != NO_NAME);
5345
5346 vec->zvec_name = name;
5347 vec->zvec_func = func;
5348 vec->zvec_secpolicy = secpolicy;
5349 vec->zvec_namecheck = namecheck;
5350 vec->zvec_pool_check = pool_check;
5351 vec->zvec_smush_outnvlist = smush_outnvlist;
5352 vec->zvec_allow_log = allow_log;
5353 }
5354
5355 static void
5356 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5357 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5358 zfs_ioc_poolcheck_t pool_check)
5359 {
5360 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5361 POOL_NAME, log_history, pool_check);
5362 }
5363
5364 static void
5365 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5366 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5367 {
5368 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5369 DATASET_NAME, B_FALSE, pool_check);
5370 }
5371
5372 static void
5373 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5374 {
5375 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5376 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5377 }
5378
5379 static void
5380 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5381 zfs_secpolicy_func_t *secpolicy)
5382 {
5383 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5384 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5385 }
5386
5387 static void
5388 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5389 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5390 {
5391 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5392 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5393 }
5394
5395 static void
5396 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5397 {
5398 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5399 zfs_secpolicy_read);
5400 }
5401
5402 static void
5403 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5404 zfs_secpolicy_func_t *secpolicy)
5405 {
5406 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5407 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5408 }
5409
5410 static void
5411 zfs_ioctl_init(void)
5412 {
5413 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5414 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5415 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5416
5417 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5418 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5419 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5420
5421 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5422 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5423 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5424
5425 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5426 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5427 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5428
5429 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5430 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5431 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5432
5433 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5434 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5435 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5436
5437 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5438 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5439 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5440
5441 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5442 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5443 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5444
5445 zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5446 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5447 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5448 zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5449 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5450 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5451
5452 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5453 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5454 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5455
5456 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
5457 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
5458 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5459
5460 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK,
5461 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME,
5462 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5463
5464 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS,
5465 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME,
5466 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5467
5468 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS,
5469 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks,
5470 POOL_NAME,
5471 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5472
5473 /* IOCTLS that use the legacy function signature */
5474
5475 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5476 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5477
5478 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5479 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5480 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5481 zfs_ioc_pool_scan);
5482 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5483 zfs_ioc_pool_upgrade);
5484 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5485 zfs_ioc_vdev_add);
5486 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5487 zfs_ioc_vdev_remove);
5488 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5489 zfs_ioc_vdev_set_state);
5490 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5491 zfs_ioc_vdev_attach);
5492 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5493 zfs_ioc_vdev_detach);
5494 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5495 zfs_ioc_vdev_setpath);
5496 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5497 zfs_ioc_vdev_setfru);
5498 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5499 zfs_ioc_pool_set_props);
5500 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5501 zfs_ioc_vdev_split);
5502 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5503 zfs_ioc_pool_reguid);
5504
5505 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5506 zfs_ioc_pool_configs, zfs_secpolicy_none);
5507 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5508 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5509 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5510 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5511 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5512 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5513 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5514 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5515
5516 /*
5517 * pool destroy, and export don't log the history as part of
5518 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5519 * does the logging of those commands.
5520 */
5521 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5522 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5523 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5524 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5525
5526 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5527 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5528 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5529 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5530
5531 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5532 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5533 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5534 zfs_ioc_dsobj_to_dsname,
5535 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5536 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5537 zfs_ioc_pool_get_history,
5538 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5539
5540 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5541 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5542
5543 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5544 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5545 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5546 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5547
5548 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5549 zfs_ioc_space_written);
5550 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5551 zfs_ioc_objset_recvd_props);
5552 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5553 zfs_ioc_next_obj);
5554 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5555 zfs_ioc_get_fsacl);
5556 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5557 zfs_ioc_objset_stats);
5558 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5559 zfs_ioc_objset_zplprops);
5560 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5561 zfs_ioc_dataset_list_next);
5562 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5563 zfs_ioc_snapshot_list_next);
5564 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5565 zfs_ioc_send_progress);
5566
5567 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5568 zfs_ioc_diff, zfs_secpolicy_diff);
5569 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5570 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5571 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5572 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5573 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5574 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5575 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5576 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5577 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5578 zfs_ioc_send, zfs_secpolicy_send);
5579
5580 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5581 zfs_secpolicy_none);
5582 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5583 zfs_secpolicy_destroy);
5584 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5585 zfs_secpolicy_rename);
5586 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5587 zfs_secpolicy_recv);
5588 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5589 zfs_secpolicy_promote);
5590 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5591 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5592 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5593 zfs_secpolicy_set_fsacl);
5594
5595 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5596 zfs_secpolicy_share, POOL_CHECK_NONE);
5597 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5598 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5599 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5600 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5601 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5602 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5603 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5604 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5605 }
5606
5607 int
5608 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5609 zfs_ioc_poolcheck_t check)
5610 {
5611 spa_t *spa;
5612 int error;
5613
5614 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5615
5616 if (check & POOL_CHECK_NONE)
5617 return (0);
5618
5619 error = spa_open(name, &spa, FTAG);
5620 if (error == 0) {
5621 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5622 error = SET_ERROR(EAGAIN);
5623 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5624 error = SET_ERROR(EROFS);
5625 spa_close(spa, FTAG);
5626 }
5627 return (error);
5628 }
5629
5630 /*
5631 * Find a free minor number.
5632 */
5633 minor_t
5634 zfsdev_minor_alloc(void)
5635 {
5636 static minor_t last_minor;
5637 minor_t m;
5638
5639 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5640
5641 for (m = last_minor + 1; m != last_minor; m++) {
5642 if (m > ZFSDEV_MAX_MINOR)
5643 m = 1;
5644 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5645 last_minor = m;
5646 return (m);
5647 }
5648 }
5649
5650 return (0);
5651 }
5652
5653 static int
5654 zfs_ctldev_init(dev_t *devp)
5655 {
5656 minor_t minor;
5657 zfs_soft_state_t *zs;
5658
5659 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5660 ASSERT(getminor(*devp) == 0);
5661
5662 minor = zfsdev_minor_alloc();
5663 if (minor == 0)
5664 return (SET_ERROR(ENXIO));
5665
5666 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5667 return (SET_ERROR(EAGAIN));
5668
5669 *devp = makedevice(getemajor(*devp), minor);
5670
5671 zs = ddi_get_soft_state(zfsdev_state, minor);
5672 zs->zss_type = ZSST_CTLDEV;
5673 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5674
5675 return (0);
5676 }
5677
5678 static void
5679 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5680 {
5681 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5682
5683 zfs_onexit_destroy(zo);
5684 ddi_soft_state_free(zfsdev_state, minor);
5685 }
5686
5687 void *
5688 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5689 {
5690 zfs_soft_state_t *zp;
5691
5692 zp = ddi_get_soft_state(zfsdev_state, minor);
5693 if (zp == NULL || zp->zss_type != which)
5694 return (NULL);
5695
5696 return (zp->zss_data);
5697 }
5698
5699 static int
5700 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5701 {
5702 int error = 0;
5703
5704 if (getminor(*devp) != 0)
5705 return (zvol_open(devp, flag, otyp, cr));
5706
5707 /* This is the control device. Allocate a new minor if requested. */
5708 if (flag & FEXCL) {
5709 mutex_enter(&zfsdev_state_lock);
5710 error = zfs_ctldev_init(devp);
5711 mutex_exit(&zfsdev_state_lock);
5712 }
5713
5714 return (error);
5715 }
5716
5717 static int
5718 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5719 {
5720 zfs_onexit_t *zo;
5721 minor_t minor = getminor(dev);
5722
5723 if (minor == 0)
5724 return (0);
5725
5726 mutex_enter(&zfsdev_state_lock);
5727 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5728 if (zo == NULL) {
5729 mutex_exit(&zfsdev_state_lock);
5730 return (zvol_close(dev, flag, otyp, cr));
5731 }
5732 zfs_ctldev_destroy(zo, minor);
5733 mutex_exit(&zfsdev_state_lock);
5734
5735 return (0);
5736 }
5737
5738 static int
5739 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5740 {
5741 zfs_cmd_t *zc;
5742 uint_t vecnum;
5743 int error, rc, len;
5744 minor_t minor = getminor(dev);
5745 const zfs_ioc_vec_t *vec;
5746 char *saved_poolname = NULL;
5747 nvlist_t *innvl = NULL;
5748
5749 if (minor != 0 &&
5750 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5751 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5752
5753 vecnum = cmd - ZFS_IOC_FIRST;
5754 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5755
5756 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5757 return (SET_ERROR(EINVAL));
5758 vec = &zfs_ioc_vec[vecnum];
5759
5760 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5761
5762 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5763 if (error != 0) {
5764 error = SET_ERROR(EFAULT);
5765 goto out;
5766 }
5767
5768 zc->zc_iflags = flag & FKIOCTL;
5769 if (zc->zc_nvlist_src_size != 0) {
5770 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5771 zc->zc_iflags, &innvl);
5772 if (error != 0)
5773 goto out;
5774 }
5775
5776 /*
5777 * Ensure that all pool/dataset names are valid before we pass down to
5778 * the lower layers.
5779 */
5780 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5781 switch (vec->zvec_namecheck) {
5782 case POOL_NAME:
5783 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5784 error = SET_ERROR(EINVAL);
5785 else
5786 error = pool_status_check(zc->zc_name,
5787 vec->zvec_namecheck, vec->zvec_pool_check);
5788 break;
5789
5790 case DATASET_NAME:
5791 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5792 error = SET_ERROR(EINVAL);
5793 else
5794 error = pool_status_check(zc->zc_name,
5795 vec->zvec_namecheck, vec->zvec_pool_check);
5796 break;
5797
5798 case NO_NAME:
5799 break;
5800 }
5801
5802
5803 if (error == 0 && !(flag & FKIOCTL))
5804 error = vec->zvec_secpolicy(zc, innvl, cr);
5805
5806 if (error != 0)
5807 goto out;
5808
5809 /* legacy ioctls can modify zc_name */
5810 len = strcspn(zc->zc_name, "/@#") + 1;
5811 saved_poolname = kmem_alloc(len, KM_SLEEP);
5812 (void) strlcpy(saved_poolname, zc->zc_name, len);
5813
5814 if (vec->zvec_func != NULL) {
5815 nvlist_t *outnvl;
5816 int puterror = 0;
5817 spa_t *spa;
5818 nvlist_t *lognv = NULL;
5819
5820 ASSERT(vec->zvec_legacy_func == NULL);
5821
5822 /*
5823 * Add the innvl to the lognv before calling the func,
5824 * in case the func changes the innvl.
5825 */
5826 if (vec->zvec_allow_log) {
5827 lognv = fnvlist_alloc();
5828 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
5829 vec->zvec_name);
5830 if (!nvlist_empty(innvl)) {
5831 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
5832 innvl);
5833 }
5834 }
5835
5836 outnvl = fnvlist_alloc();
5837 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
5838
5839 if (error == 0 && vec->zvec_allow_log &&
5840 spa_open(zc->zc_name, &spa, FTAG) == 0) {
5841 if (!nvlist_empty(outnvl)) {
5842 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
5843 outnvl);
5844 }
5845 (void) spa_history_log_nvl(spa, lognv);
5846 spa_close(spa, FTAG);
5847 }
5848 fnvlist_free(lognv);
5849
5850 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
5851 int smusherror = 0;
5852 if (vec->zvec_smush_outnvlist) {
5853 smusherror = nvlist_smush(outnvl,
5854 zc->zc_nvlist_dst_size);
5855 }
5856 if (smusherror == 0)
5857 puterror = put_nvlist(zc, outnvl);
5858 }
5859
5860 if (puterror != 0)
5861 error = puterror;
5862
5863 nvlist_free(outnvl);
5864 } else {
5865 error = vec->zvec_legacy_func(zc);
5866 }
5867
5868 out:
5869 nvlist_free(innvl);
5870 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5871 if (error == 0 && rc != 0)
5872 error = SET_ERROR(EFAULT);
5873 if (error == 0 && vec->zvec_allow_log) {
5874 char *s = tsd_get(zfs_allow_log_key);
5875 if (s != NULL)
5876 strfree(s);
5877 (void) tsd_set(zfs_allow_log_key, saved_poolname);
5878 } else {
5879 if (saved_poolname != NULL)
5880 strfree(saved_poolname);
5881 }
5882
5883 kmem_free(zc, sizeof (zfs_cmd_t));
5884 return (error);
5885 }
5886
5887 static int
5888 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5889 {
5890 if (cmd != DDI_ATTACH)
5891 return (DDI_FAILURE);
5892
5893 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5894 DDI_PSEUDO, 0) == DDI_FAILURE)
5895 return (DDI_FAILURE);
5896
5897 zfs_dip = dip;
5898
5899 ddi_report_dev(dip);
5900
5901 return (DDI_SUCCESS);
5902 }
5903
5904 static int
5905 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5906 {
5907 if (spa_busy() || zfs_busy() || zvol_busy())
5908 return (DDI_FAILURE);
5909
5910 if (cmd != DDI_DETACH)
5911 return (DDI_FAILURE);
5912
5913 zfs_dip = NULL;
5914
5915 ddi_prop_remove_all(dip);
5916 ddi_remove_minor_node(dip, NULL);
5917
5918 return (DDI_SUCCESS);
5919 }
5920
5921 /*ARGSUSED*/
5922 static int
5923 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5924 {
5925 switch (infocmd) {
5926 case DDI_INFO_DEVT2DEVINFO:
5927 *result = zfs_dip;
5928 return (DDI_SUCCESS);
5929
5930 case DDI_INFO_DEVT2INSTANCE:
5931 *result = (void *)0;
5932 return (DDI_SUCCESS);
5933 }
5934
5935 return (DDI_FAILURE);
5936 }
5937
5938 /*
5939 * OK, so this is a little weird.
5940 *
5941 * /dev/zfs is the control node, i.e. minor 0.
5942 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5943 *
5944 * /dev/zfs has basically nothing to do except serve up ioctls,
5945 * so most of the standard driver entry points are in zvol.c.
5946 */
5947 static struct cb_ops zfs_cb_ops = {
5948 zfsdev_open, /* open */
5949 zfsdev_close, /* close */
5950 zvol_strategy, /* strategy */
5951 nodev, /* print */
5952 zvol_dump, /* dump */
5953 zvol_read, /* read */
5954 zvol_write, /* write */
5955 zfsdev_ioctl, /* ioctl */
5956 nodev, /* devmap */
5957 nodev, /* mmap */
5958 nodev, /* segmap */
5959 nochpoll, /* poll */
5960 ddi_prop_op, /* prop_op */
5961 NULL, /* streamtab */
5962 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
5963 CB_REV, /* version */
5964 nodev, /* async read */
5965 nodev, /* async write */
5966 };
5967
5968 static struct dev_ops zfs_dev_ops = {
5969 DEVO_REV, /* version */
5970 0, /* refcnt */
5971 zfs_info, /* info */
5972 nulldev, /* identify */
5973 nulldev, /* probe */
5974 zfs_attach, /* attach */
5975 zfs_detach, /* detach */
5976 nodev, /* reset */
5977 &zfs_cb_ops, /* driver operations */
5978 NULL, /* no bus operations */
5979 NULL, /* power */
5980 ddi_quiesce_not_needed, /* quiesce */
5981 };
5982
5983 static struct modldrv zfs_modldrv = {
5984 &mod_driverops,
5985 "ZFS storage pool",
5986 &zfs_dev_ops
5987 };
5988
5989 static struct modlinkage modlinkage = {
5990 MODREV_1,
5991 (void *)&zfs_modlfs,
5992 (void *)&zfs_modldrv,
5993 NULL
5994 };
5995
5996 static void
5997 zfs_allow_log_destroy(void *arg)
5998 {
5999 char *poolname = arg;
6000 strfree(poolname);
6001 }
6002
6003 int
6004 _init(void)
6005 {
6006 int error;
6007
6008 spa_init(FREAD | FWRITE);
6009 zfs_init();
6010 zvol_init();
6011 zfs_ioctl_init();
6012
6013 if ((error = mod_install(&modlinkage)) != 0) {
6014 zvol_fini();
6015 zfs_fini();
6016 spa_fini();
6017 return (error);
6018 }
6019
6020 tsd_create(&zfs_fsyncer_key, NULL);
6021 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
6022 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
6023
6024 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
6025 ASSERT(error == 0);
6026 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
6027
6028 return (0);
6029 }
6030
6031 int
6032 _fini(void)
6033 {
6034 int error;
6035
6036 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
6037 return (SET_ERROR(EBUSY));
6038
6039 if ((error = mod_remove(&modlinkage)) != 0)
6040 return (error);
6041
6042 zvol_fini();
6043 zfs_fini();
6044 spa_fini();
6045 if (zfs_nfsshare_inited)
6046 (void) ddi_modclose(nfs_mod);
6047 if (zfs_smbshare_inited)
6048 (void) ddi_modclose(smbsrv_mod);
6049 if (zfs_nfsshare_inited || zfs_smbshare_inited)
6050 (void) ddi_modclose(sharefs_mod);
6051
6052 tsd_destroy(&zfs_fsyncer_key);
6053 ldi_ident_release(zfs_li);
6054 zfs_li = NULL;
6055 mutex_destroy(&zfs_share_lock);
6056
6057 return (error);
6058 }
6059
6060 int
6061 _info(struct modinfo *modinfop)
6062 {
6063 return (mod_info(&modlinkage, modinfop));
6064 }