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