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 2015 Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2014, Joyent, Inc. All rights reserved.
27 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
28 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
29 * Copyright (c) 2013 Steven Hartland. All rights reserved.
30 */
31
32 /*
33 * ZFS ioctls.
34 *
35 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
36 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
37 *
38 * There are two ways that we handle ioctls: the legacy way where almost
39 * all of the logic is in the ioctl callback, and the new way where most
40 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
41 *
42 * Non-legacy ioctls should be registered by calling
43 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
44 * from userland by lzc_ioctl().
45 *
46 * The registration arguments are as follows:
47 *
48 * const char *name
49 * The name of the ioctl. This is used for history logging. If the
50 * ioctl returns successfully (the callback returns 0), and allow_log
51 * is true, then a history log entry will be recorded with the input &
52 * output nvlists. The log entry can be printed with "zpool history -i".
53 *
54 * zfs_ioc_t ioc
55 * The ioctl request number, which userland will pass to ioctl(2).
56 * The ioctl numbers can change from release to release, because
57 * the caller (libzfs) must be matched to the kernel.
58 *
59 * zfs_secpolicy_func_t *secpolicy
60 * This function will be called before the zfs_ioc_func_t, to
61 * determine if this operation is permitted. It should return EPERM
62 * on failure, and 0 on success. Checks include determining if the
63 * dataset is visible in this zone, and if the user has either all
64 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
65 * to do this operation on this dataset with "zfs allow".
66 *
67 * zfs_ioc_namecheck_t namecheck
68 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
69 * name, a dataset name, or nothing. If the name is not well-formed,
70 * the ioctl will fail and the callback will not be called.
71 * Therefore, the callback can assume that the name is well-formed
72 * (e.g. is null-terminated, doesn't have more than one '@' character,
73 * doesn't have invalid characters).
74 *
75 * zfs_ioc_poolcheck_t pool_check
76 * This specifies requirements on the pool state. If the pool does
77 * not meet them (is suspended or is readonly), the ioctl will fail
78 * and the callback will not be called. If any checks are specified
79 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
80 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
81 * POOL_CHECK_READONLY).
82 *
83 * boolean_t smush_outnvlist
84 * If smush_outnvlist is true, then the output is presumed to be a
85 * list of errors, and it will be "smushed" down to fit into the
86 * caller's buffer, by removing some entries and replacing them with a
87 * single "N_MORE_ERRORS" entry indicating how many were removed. See
88 * nvlist_smush() for details. If smush_outnvlist is false, and the
89 * outnvlist does not fit into the userland-provided buffer, then the
90 * ioctl will fail with ENOMEM.
91 *
92 * zfs_ioc_func_t *func
93 * The callback function that will perform the operation.
94 *
95 * The callback should return 0 on success, or an error number on
96 * failure. If the function fails, the userland ioctl will return -1,
97 * and errno will be set to the callback's return value. The callback
98 * will be called with the following arguments:
99 *
100 * const char *name
101 * The name of the pool or dataset to operate on, from
102 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
103 * expected type (pool, dataset, or none).
104 *
105 * nvlist_t *innvl
106 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
107 * NULL if no input nvlist was provided. Changes to this nvlist are
108 * ignored. If the input nvlist could not be deserialized, the
109 * ioctl will fail and the callback will not be called.
110 *
111 * nvlist_t *outnvl
112 * The output nvlist, initially empty. The callback can fill it in,
113 * and it will be returned to userland by serializing it into
114 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
115 * fails (e.g. because the caller didn't supply a large enough
116 * buffer), then the overall ioctl will fail. See the
117 * 'smush_nvlist' argument above for additional behaviors.
118 *
119 * There are two typical uses of the output nvlist:
120 * - To return state, e.g. property values. In this case,
121 * smush_outnvlist should be false. If the buffer was not large
122 * enough, the caller will reallocate a larger buffer and try
123 * the ioctl again.
124 *
125 * - To return multiple errors from an ioctl which makes on-disk
126 * changes. In this case, smush_outnvlist should be true.
127 * Ioctls which make on-disk modifications should generally not
128 * use the outnvl if they succeed, because the caller can not
129 * distinguish between the operation failing, and
130 * deserialization failing.
131 */
132
133 #include <sys/types.h>
134 #include <sys/param.h>
135 #include <sys/errno.h>
136 #include <sys/uio.h>
137 #include <sys/buf.h>
138 #include <sys/modctl.h>
139 #include <sys/open.h>
140 #include <sys/file.h>
141 #include <sys/kmem.h>
142 #include <sys/conf.h>
143 #include <sys/cmn_err.h>
144 #include <sys/stat.h>
145 #include <sys/zfs_ioctl.h>
146 #include <sys/zfs_vfsops.h>
147 #include <sys/zfs_znode.h>
148 #include <sys/zap.h>
149 #include <sys/spa.h>
150 #include <sys/spa_impl.h>
151 #include <sys/vdev.h>
152 #include <sys/priv_impl.h>
153 #include <sys/dmu.h>
154 #include <sys/dsl_dir.h>
155 #include <sys/dsl_dataset.h>
156 #include <sys/dsl_prop.h>
157 #include <sys/dsl_deleg.h>
158 #include <sys/dmu_objset.h>
159 #include <sys/dmu_impl.h>
160 #include <sys/dmu_tx.h>
161 #include <sys/ddi.h>
162 #include <sys/sunddi.h>
163 #include <sys/sunldi.h>
164 #include <sys/policy.h>
165 #include <sys/zone.h>
166 #include <sys/nvpair.h>
167 #include <sys/pathname.h>
168 #include <sys/mount.h>
169 #include <sys/sdt.h>
170 #include <sys/fs/zfs.h>
171 #include <sys/zfs_ctldir.h>
172 #include <sys/zfs_dir.h>
173 #include <sys/zfs_onexit.h>
174 #include <sys/zvol.h>
175 #include <sys/dsl_scan.h>
176 #include <sharefs/share.h>
177 #include <sys/dmu_objset.h>
178 #include <sys/dmu_send.h>
179 #include <sys/dsl_destroy.h>
180 #include <sys/dsl_bookmark.h>
181 #include <sys/dsl_userhold.h>
182 #include <sys/zfeature.h>
183 #include <sys/zio_checksum.h>
184
185 #include "zfs_namecheck.h"
186 #include "zfs_prop.h"
187 #include "zfs_deleg.h"
188 #include "zfs_comutil.h"
189
190 extern struct modlfs zfs_modlfs;
191
192 extern void zfs_init(void);
193 extern void zfs_fini(void);
194
195 ldi_ident_t zfs_li = NULL;
196 dev_info_t *zfs_dip;
197
198 uint_t zfs_fsyncer_key;
199 extern uint_t rrw_tsd_key;
200 static uint_t zfs_allow_log_key;
201
202 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
203 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
204 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
205
206 typedef enum {
207 NO_NAME,
208 POOL_NAME,
209 DATASET_NAME
210 } zfs_ioc_namecheck_t;
211
212 typedef enum {
213 POOL_CHECK_NONE = 1 << 0,
214 POOL_CHECK_SUSPENDED = 1 << 1,
215 POOL_CHECK_READONLY = 1 << 2,
216 } zfs_ioc_poolcheck_t;
217
218 typedef struct zfs_ioc_vec {
219 zfs_ioc_legacy_func_t *zvec_legacy_func;
220 zfs_ioc_func_t *zvec_func;
221 zfs_secpolicy_func_t *zvec_secpolicy;
222 zfs_ioc_namecheck_t zvec_namecheck;
223 boolean_t zvec_allow_log;
224 zfs_ioc_poolcheck_t zvec_pool_check;
225 boolean_t zvec_smush_outnvlist;
226 const char *zvec_name;
227 } zfs_ioc_vec_t;
228
229 /* This array is indexed by zfs_userquota_prop_t */
230 static const char *userquota_perms[] = {
231 ZFS_DELEG_PERM_USERUSED,
232 ZFS_DELEG_PERM_USERQUOTA,
233 ZFS_DELEG_PERM_GROUPUSED,
234 ZFS_DELEG_PERM_GROUPQUOTA,
235 };
236
237 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
238 static int zfs_check_settable(const char *name, nvpair_t *property,
239 cred_t *cr);
240 static int zfs_check_clearable(char *dataset, nvlist_t *props,
241 nvlist_t **errors);
242 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
243 boolean_t *);
244 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
245 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
246
247 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature);
248
249 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
250 void
251 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
252 {
253 const char *newfile;
254 char buf[512];
255 va_list adx;
256
257 /*
258 * Get rid of annoying "../common/" prefix to filename.
259 */
260 newfile = strrchr(file, '/');
261 if (newfile != NULL) {
262 newfile = newfile + 1; /* Get rid of leading / */
263 } else {
264 newfile = file;
265 }
266
267 va_start(adx, fmt);
268 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
269 va_end(adx);
270
271 /*
272 * To get this data, use the zfs-dprintf probe as so:
273 * dtrace -q -n 'zfs-dprintf \
274 * /stringof(arg0) == "dbuf.c"/ \
275 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
276 * arg0 = file name
277 * arg1 = function name
278 * arg2 = line number
279 * arg3 = message
280 */
281 DTRACE_PROBE4(zfs__dprintf,
282 char *, newfile, char *, func, int, line, char *, buf);
283 }
284
285 static void
286 history_str_free(char *buf)
287 {
288 kmem_free(buf, HIS_MAX_RECORD_LEN);
289 }
290
291 static char *
292 history_str_get(zfs_cmd_t *zc)
293 {
294 char *buf;
295
296 if (zc->zc_history == NULL)
297 return (NULL);
298
299 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
300 if (copyinstr((void *)(uintptr_t)zc->zc_history,
301 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
302 history_str_free(buf);
303 return (NULL);
304 }
305
306 buf[HIS_MAX_RECORD_LEN -1] = '\0';
307
308 return (buf);
309 }
310
311 /*
312 * Check to see if the named dataset is currently defined as bootable
313 */
314 static boolean_t
315 zfs_is_bootfs(const char *name)
316 {
317 objset_t *os;
318
319 if (dmu_objset_hold(name, FTAG, &os) == 0) {
320 boolean_t ret;
321 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
322 dmu_objset_rele(os, FTAG);
323 return (ret);
324 }
325 return (B_FALSE);
326 }
327
328 /*
329 * Return non-zero if the spa version is less than requested version.
330 */
331 static int
332 zfs_earlier_version(const char *name, int version)
333 {
334 spa_t *spa;
335
336 if (spa_open(name, &spa, FTAG) == 0) {
337 if (spa_version(spa) < version) {
338 spa_close(spa, FTAG);
339 return (1);
340 }
341 spa_close(spa, FTAG);
342 }
343 return (0);
344 }
345
346 /*
347 * Return TRUE if the ZPL version is less than requested version.
348 */
349 static boolean_t
350 zpl_earlier_version(const char *name, int version)
351 {
352 objset_t *os;
353 boolean_t rc = B_TRUE;
354
355 if (dmu_objset_hold(name, FTAG, &os) == 0) {
356 uint64_t zplversion;
357
358 if (dmu_objset_type(os) != DMU_OST_ZFS) {
359 dmu_objset_rele(os, FTAG);
360 return (B_TRUE);
361 }
362 /* XXX reading from non-owned objset */
363 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
364 rc = zplversion < version;
365 dmu_objset_rele(os, FTAG);
366 }
367 return (rc);
368 }
369
370 static void
371 zfs_log_history(zfs_cmd_t *zc)
372 {
373 spa_t *spa;
374 char *buf;
375
376 if ((buf = history_str_get(zc)) == NULL)
377 return;
378
379 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
380 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
381 (void) spa_history_log(spa, buf);
382 spa_close(spa, FTAG);
383 }
384 history_str_free(buf);
385 }
386
387 /*
388 * Policy for top-level read operations (list pools). Requires no privileges,
389 * and can be used in the local zone, as there is no associated dataset.
390 */
391 /* ARGSUSED */
392 static int
393 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
394 {
395 return (0);
396 }
397
398 /*
399 * Policy for dataset read operations (list children, get statistics). Requires
400 * no privileges, but must be visible in the local zone.
401 */
402 /* ARGSUSED */
403 static int
404 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
405 {
406 if (INGLOBALZONE(curproc) ||
407 zone_dataset_visible(zc->zc_name, NULL))
408 return (0);
409
410 return (SET_ERROR(ENOENT));
411 }
412
413 static int
414 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
415 {
416 int writable = 1;
417
418 /*
419 * The dataset must be visible by this zone -- check this first
420 * so they don't see EPERM on something they shouldn't know about.
421 */
422 if (!INGLOBALZONE(curproc) &&
423 !zone_dataset_visible(dataset, &writable))
424 return (SET_ERROR(ENOENT));
425
426 if (INGLOBALZONE(curproc)) {
427 /*
428 * If the fs is zoned, only root can access it from the
429 * global zone.
430 */
431 if (secpolicy_zfs(cr) && zoned)
432 return (SET_ERROR(EPERM));
433 } else {
434 /*
435 * If we are in a local zone, the 'zoned' property must be set.
436 */
437 if (!zoned)
438 return (SET_ERROR(EPERM));
439
440 /* must be writable by this zone */
441 if (!writable)
442 return (SET_ERROR(EPERM));
443 }
444 return (0);
445 }
446
447 static int
448 zfs_dozonecheck(const char *dataset, cred_t *cr)
449 {
450 uint64_t zoned;
451
452 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
453 return (SET_ERROR(ENOENT));
454
455 return (zfs_dozonecheck_impl(dataset, zoned, cr));
456 }
457
458 static int
459 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
460 {
461 uint64_t zoned;
462
463 if (dsl_prop_get_int_ds(ds, "zoned", &zoned))
464 return (SET_ERROR(ENOENT));
465
466 return (zfs_dozonecheck_impl(dataset, zoned, cr));
467 }
468
469 static int
470 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
471 const char *perm, cred_t *cr)
472 {
473 int error;
474
475 error = zfs_dozonecheck_ds(name, ds, cr);
476 if (error == 0) {
477 error = secpolicy_zfs(cr);
478 if (error != 0)
479 error = dsl_deleg_access_impl(ds, perm, cr);
480 }
481 return (error);
482 }
483
484 static int
485 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
486 {
487 int error;
488 dsl_dataset_t *ds;
489 dsl_pool_t *dp;
490
491 error = dsl_pool_hold(name, FTAG, &dp);
492 if (error != 0)
493 return (error);
494
495 error = dsl_dataset_hold(dp, name, FTAG, &ds);
496 if (error != 0) {
497 dsl_pool_rele(dp, FTAG);
498 return (error);
499 }
500
501 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr);
502
503 dsl_dataset_rele(ds, FTAG);
504 dsl_pool_rele(dp, FTAG);
505 return (error);
506 }
507
508 /*
509 * Policy for setting the security label property.
510 *
511 * Returns 0 for success, non-zero for access and other errors.
512 */
513 static int
514 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
515 {
516 char ds_hexsl[MAXNAMELEN];
517 bslabel_t ds_sl, new_sl;
518 boolean_t new_default = FALSE;
519 uint64_t zoned;
520 int needed_priv = -1;
521 int error;
522
523 /* First get the existing dataset label. */
524 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
525 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
526 if (error != 0)
527 return (SET_ERROR(EPERM));
528
529 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
530 new_default = TRUE;
531
532 /* The label must be translatable */
533 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
534 return (SET_ERROR(EINVAL));
535
536 /*
537 * In a non-global zone, disallow attempts to set a label that
538 * doesn't match that of the zone; otherwise no other checks
539 * are needed.
540 */
541 if (!INGLOBALZONE(curproc)) {
542 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
543 return (SET_ERROR(EPERM));
544 return (0);
545 }
546
547 /*
548 * For global-zone datasets (i.e., those whose zoned property is
549 * "off", verify that the specified new label is valid for the
550 * global zone.
551 */
552 if (dsl_prop_get_integer(name,
553 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
554 return (SET_ERROR(EPERM));
555 if (!zoned) {
556 if (zfs_check_global_label(name, strval) != 0)
557 return (SET_ERROR(EPERM));
558 }
559
560 /*
561 * If the existing dataset label is nondefault, check if the
562 * dataset is mounted (label cannot be changed while mounted).
563 * Get the zfsvfs; if there isn't one, then the dataset isn't
564 * mounted (or isn't a dataset, doesn't exist, ...).
565 */
566 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
567 objset_t *os;
568 static char *setsl_tag = "setsl_tag";
569
570 /*
571 * Try to own the dataset; abort if there is any error,
572 * (e.g., already mounted, in use, or other error).
573 */
574 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
575 setsl_tag, &os);
576 if (error != 0)
577 return (SET_ERROR(EPERM));
578
579 dmu_objset_disown(os, setsl_tag);
580
581 if (new_default) {
582 needed_priv = PRIV_FILE_DOWNGRADE_SL;
583 goto out_check;
584 }
585
586 if (hexstr_to_label(strval, &new_sl) != 0)
587 return (SET_ERROR(EPERM));
588
589 if (blstrictdom(&ds_sl, &new_sl))
590 needed_priv = PRIV_FILE_DOWNGRADE_SL;
591 else if (blstrictdom(&new_sl, &ds_sl))
592 needed_priv = PRIV_FILE_UPGRADE_SL;
593 } else {
594 /* dataset currently has a default label */
595 if (!new_default)
596 needed_priv = PRIV_FILE_UPGRADE_SL;
597 }
598
599 out_check:
600 if (needed_priv != -1)
601 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
602 return (0);
603 }
604
605 static int
606 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
607 cred_t *cr)
608 {
609 char *strval;
610
611 /*
612 * Check permissions for special properties.
613 */
614 switch (prop) {
615 case ZFS_PROP_ZONED:
616 /*
617 * Disallow setting of 'zoned' from within a local zone.
618 */
619 if (!INGLOBALZONE(curproc))
620 return (SET_ERROR(EPERM));
621 break;
622
623 case ZFS_PROP_QUOTA:
624 case ZFS_PROP_FILESYSTEM_LIMIT:
625 case ZFS_PROP_SNAPSHOT_LIMIT:
626 if (!INGLOBALZONE(curproc)) {
627 uint64_t zoned;
628 char setpoint[MAXNAMELEN];
629 /*
630 * Unprivileged users are allowed to modify the
631 * limit on things *under* (ie. contained by)
632 * the thing they own.
633 */
634 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
635 setpoint))
636 return (SET_ERROR(EPERM));
637 if (!zoned || strlen(dsname) <= strlen(setpoint))
638 return (SET_ERROR(EPERM));
639 }
640 break;
641
642 case ZFS_PROP_MLSLABEL:
643 if (!is_system_labeled())
644 return (SET_ERROR(EPERM));
645
646 if (nvpair_value_string(propval, &strval) == 0) {
647 int err;
648
649 err = zfs_set_slabel_policy(dsname, strval, CRED());
650 if (err != 0)
651 return (err);
652 }
653 break;
654 }
655
656 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
657 }
658
659 /* ARGSUSED */
660 static int
661 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
662 {
663 int error;
664
665 error = zfs_dozonecheck(zc->zc_name, cr);
666 if (error != 0)
667 return (error);
668
669 /*
670 * permission to set permissions will be evaluated later in
671 * dsl_deleg_can_allow()
672 */
673 return (0);
674 }
675
676 /* ARGSUSED */
677 static int
678 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
679 {
680 return (zfs_secpolicy_write_perms(zc->zc_name,
681 ZFS_DELEG_PERM_ROLLBACK, cr));
682 }
683
684 /* ARGSUSED */
685 static int
686 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
687 {
688 dsl_pool_t *dp;
689 dsl_dataset_t *ds;
690 char *cp;
691 int error;
692
693 /*
694 * Generate the current snapshot name from the given objsetid, then
695 * use that name for the secpolicy/zone checks.
696 */
697 cp = strchr(zc->zc_name, '@');
698 if (cp == NULL)
699 return (SET_ERROR(EINVAL));
700 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
701 if (error != 0)
702 return (error);
703
704 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
705 if (error != 0) {
706 dsl_pool_rele(dp, FTAG);
707 return (error);
708 }
709
710 dsl_dataset_name(ds, zc->zc_name);
711
712 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
713 ZFS_DELEG_PERM_SEND, cr);
714 dsl_dataset_rele(ds, FTAG);
715 dsl_pool_rele(dp, FTAG);
716
717 return (error);
718 }
719
720 /* ARGSUSED */
721 static int
722 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
723 {
724 return (zfs_secpolicy_write_perms(zc->zc_name,
725 ZFS_DELEG_PERM_SEND, cr));
726 }
727
728 /* ARGSUSED */
729 static int
730 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
731 {
732 vnode_t *vp;
733 int error;
734
735 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
736 NO_FOLLOW, NULL, &vp)) != 0)
737 return (error);
738
739 /* Now make sure mntpnt and dataset are ZFS */
740
741 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
742 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
743 zc->zc_name) != 0)) {
744 VN_RELE(vp);
745 return (SET_ERROR(EPERM));
746 }
747
748 VN_RELE(vp);
749 return (dsl_deleg_access(zc->zc_name,
750 ZFS_DELEG_PERM_SHARE, cr));
751 }
752
753 int
754 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
755 {
756 if (!INGLOBALZONE(curproc))
757 return (SET_ERROR(EPERM));
758
759 if (secpolicy_nfs(cr) == 0) {
760 return (0);
761 } else {
762 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
763 }
764 }
765
766 int
767 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
768 {
769 if (!INGLOBALZONE(curproc))
770 return (SET_ERROR(EPERM));
771
772 if (secpolicy_smb(cr) == 0) {
773 return (0);
774 } else {
775 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
776 }
777 }
778
779 static int
780 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
781 {
782 char *cp;
783
784 /*
785 * Remove the @bla or /bla from the end of the name to get the parent.
786 */
787 (void) strncpy(parent, datasetname, parentsize);
788 cp = strrchr(parent, '@');
789 if (cp != NULL) {
790 cp[0] = '\0';
791 } else {
792 cp = strrchr(parent, '/');
793 if (cp == NULL)
794 return (SET_ERROR(ENOENT));
795 cp[0] = '\0';
796 }
797
798 return (0);
799 }
800
801 int
802 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
803 {
804 int error;
805
806 if ((error = zfs_secpolicy_write_perms(name,
807 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
808 return (error);
809
810 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
811 }
812
813 /* ARGSUSED */
814 static int
815 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
816 {
817 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
818 }
819
820 /*
821 * Destroying snapshots with delegated permissions requires
822 * descendant mount and destroy permissions.
823 */
824 /* ARGSUSED */
825 static int
826 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
827 {
828 nvlist_t *snaps;
829 nvpair_t *pair, *nextpair;
830 int error = 0;
831
832 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
833 return (SET_ERROR(EINVAL));
834 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
835 pair = nextpair) {
836 nextpair = nvlist_next_nvpair(snaps, pair);
837 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr);
838 if (error == ENOENT) {
839 /*
840 * Ignore any snapshots that don't exist (we consider
841 * them "already destroyed"). Remove the name from the
842 * nvl here in case the snapshot is created between
843 * now and when we try to destroy it (in which case
844 * we don't want to destroy it since we haven't
845 * checked for permission).
846 */
847 fnvlist_remove_nvpair(snaps, pair);
848 error = 0;
849 }
850 if (error != 0)
851 break;
852 }
853
854 return (error);
855 }
856
857 int
858 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
859 {
860 char parentname[MAXNAMELEN];
861 int error;
862
863 if ((error = zfs_secpolicy_write_perms(from,
864 ZFS_DELEG_PERM_RENAME, cr)) != 0)
865 return (error);
866
867 if ((error = zfs_secpolicy_write_perms(from,
868 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
869 return (error);
870
871 if ((error = zfs_get_parent(to, parentname,
872 sizeof (parentname))) != 0)
873 return (error);
874
875 if ((error = zfs_secpolicy_write_perms(parentname,
876 ZFS_DELEG_PERM_CREATE, cr)) != 0)
877 return (error);
878
879 if ((error = zfs_secpolicy_write_perms(parentname,
880 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
881 return (error);
882
883 return (error);
884 }
885
886 /* ARGSUSED */
887 static int
888 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
889 {
890 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
891 }
892
893 /* ARGSUSED */
894 static int
895 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
896 {
897 dsl_pool_t *dp;
898 dsl_dataset_t *clone;
899 int error;
900
901 error = zfs_secpolicy_write_perms(zc->zc_name,
902 ZFS_DELEG_PERM_PROMOTE, cr);
903 if (error != 0)
904 return (error);
905
906 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
907 if (error != 0)
908 return (error);
909
910 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
911
912 if (error == 0) {
913 char parentname[MAXNAMELEN];
914 dsl_dataset_t *origin = NULL;
915 dsl_dir_t *dd;
916 dd = clone->ds_dir;
917
918 error = dsl_dataset_hold_obj(dd->dd_pool,
919 dsl_dir_phys(dd)->dd_origin_obj, FTAG, &origin);
920 if (error != 0) {
921 dsl_dataset_rele(clone, FTAG);
922 dsl_pool_rele(dp, FTAG);
923 return (error);
924 }
925
926 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
927 ZFS_DELEG_PERM_MOUNT, cr);
928
929 dsl_dataset_name(origin, parentname);
930 if (error == 0) {
931 error = zfs_secpolicy_write_perms_ds(parentname, origin,
932 ZFS_DELEG_PERM_PROMOTE, cr);
933 }
934 dsl_dataset_rele(clone, FTAG);
935 dsl_dataset_rele(origin, FTAG);
936 }
937 dsl_pool_rele(dp, FTAG);
938 return (error);
939 }
940
941 /* ARGSUSED */
942 static int
943 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
944 {
945 int error;
946
947 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
948 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
949 return (error);
950
951 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
952 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
953 return (error);
954
955 return (zfs_secpolicy_write_perms(zc->zc_name,
956 ZFS_DELEG_PERM_CREATE, cr));
957 }
958
959 int
960 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
961 {
962 return (zfs_secpolicy_write_perms(name,
963 ZFS_DELEG_PERM_SNAPSHOT, cr));
964 }
965
966 /*
967 * Check for permission to create each snapshot in the nvlist.
968 */
969 /* ARGSUSED */
970 static int
971 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
972 {
973 nvlist_t *snaps;
974 int error = 0;
975 nvpair_t *pair;
976
977 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
978 return (SET_ERROR(EINVAL));
979 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
980 pair = nvlist_next_nvpair(snaps, pair)) {
981 char *name = nvpair_name(pair);
982 char *atp = strchr(name, '@');
983
984 if (atp == NULL) {
985 error = SET_ERROR(EINVAL);
986 break;
987 }
988 *atp = '\0';
989 error = zfs_secpolicy_snapshot_perms(name, cr);
990 *atp = '@';
991 if (error != 0)
992 break;
993 }
994 return (error);
995 }
996
997 /*
998 * Check for permission to create each snapshot in the nvlist.
999 */
1000 /* ARGSUSED */
1001 static int
1002 zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1003 {
1004 int error = 0;
1005
1006 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
1007 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
1008 char *name = nvpair_name(pair);
1009 char *hashp = strchr(name, '#');
1010
1011 if (hashp == NULL) {
1012 error = SET_ERROR(EINVAL);
1013 break;
1014 }
1015 *hashp = '\0';
1016 error = zfs_secpolicy_write_perms(name,
1017 ZFS_DELEG_PERM_BOOKMARK, cr);
1018 *hashp = '#';
1019 if (error != 0)
1020 break;
1021 }
1022 return (error);
1023 }
1024
1025 /* ARGSUSED */
1026 static int
1027 zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1028 {
1029 nvpair_t *pair, *nextpair;
1030 int error = 0;
1031
1032 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1033 pair = nextpair) {
1034 char *name = nvpair_name(pair);
1035 char *hashp = strchr(name, '#');
1036 nextpair = nvlist_next_nvpair(innvl, pair);
1037
1038 if (hashp == NULL) {
1039 error = SET_ERROR(EINVAL);
1040 break;
1041 }
1042
1043 *hashp = '\0';
1044 error = zfs_secpolicy_write_perms(name,
1045 ZFS_DELEG_PERM_DESTROY, cr);
1046 *hashp = '#';
1047 if (error == ENOENT) {
1048 /*
1049 * Ignore any filesystems that don't exist (we consider
1050 * their bookmarks "already destroyed"). Remove
1051 * the name from the nvl here in case the filesystem
1052 * is created between now and when we try to destroy
1053 * the bookmark (in which case we don't want to
1054 * destroy it since we haven't checked for permission).
1055 */
1056 fnvlist_remove_nvpair(innvl, pair);
1057 error = 0;
1058 }
1059 if (error != 0)
1060 break;
1061 }
1062
1063 return (error);
1064 }
1065
1066 /* ARGSUSED */
1067 static int
1068 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1069 {
1070 /*
1071 * Even root must have a proper TSD so that we know what pool
1072 * to log to.
1073 */
1074 if (tsd_get(zfs_allow_log_key) == NULL)
1075 return (SET_ERROR(EPERM));
1076 return (0);
1077 }
1078
1079 static int
1080 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1081 {
1082 char parentname[MAXNAMELEN];
1083 int error;
1084 char *origin;
1085
1086 if ((error = zfs_get_parent(zc->zc_name, parentname,
1087 sizeof (parentname))) != 0)
1088 return (error);
1089
1090 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1091 (error = zfs_secpolicy_write_perms(origin,
1092 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1093 return (error);
1094
1095 if ((error = zfs_secpolicy_write_perms(parentname,
1096 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1097 return (error);
1098
1099 return (zfs_secpolicy_write_perms(parentname,
1100 ZFS_DELEG_PERM_MOUNT, cr));
1101 }
1102
1103 /*
1104 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1105 * SYS_CONFIG privilege, which is not available in a local zone.
1106 */
1107 /* ARGSUSED */
1108 static int
1109 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1110 {
1111 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1112 return (SET_ERROR(EPERM));
1113
1114 return (0);
1115 }
1116
1117 /*
1118 * Policy for object to name lookups.
1119 */
1120 /* ARGSUSED */
1121 static int
1122 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1123 {
1124 int error;
1125
1126 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1127 return (0);
1128
1129 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1130 return (error);
1131 }
1132
1133 /*
1134 * Policy for fault injection. Requires all privileges.
1135 */
1136 /* ARGSUSED */
1137 static int
1138 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1139 {
1140 return (secpolicy_zinject(cr));
1141 }
1142
1143 /* ARGSUSED */
1144 static int
1145 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1146 {
1147 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1148
1149 if (prop == ZPROP_INVAL) {
1150 if (!zfs_prop_user(zc->zc_value))
1151 return (SET_ERROR(EINVAL));
1152 return (zfs_secpolicy_write_perms(zc->zc_name,
1153 ZFS_DELEG_PERM_USERPROP, cr));
1154 } else {
1155 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1156 NULL, cr));
1157 }
1158 }
1159
1160 static int
1161 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1162 {
1163 int err = zfs_secpolicy_read(zc, innvl, cr);
1164 if (err)
1165 return (err);
1166
1167 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1168 return (SET_ERROR(EINVAL));
1169
1170 if (zc->zc_value[0] == 0) {
1171 /*
1172 * They are asking about a posix uid/gid. If it's
1173 * themself, allow it.
1174 */
1175 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1176 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1177 if (zc->zc_guid == crgetuid(cr))
1178 return (0);
1179 } else {
1180 if (groupmember(zc->zc_guid, cr))
1181 return (0);
1182 }
1183 }
1184
1185 return (zfs_secpolicy_write_perms(zc->zc_name,
1186 userquota_perms[zc->zc_objset_type], cr));
1187 }
1188
1189 static int
1190 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1191 {
1192 int err = zfs_secpolicy_read(zc, innvl, cr);
1193 if (err)
1194 return (err);
1195
1196 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1197 return (SET_ERROR(EINVAL));
1198
1199 return (zfs_secpolicy_write_perms(zc->zc_name,
1200 userquota_perms[zc->zc_objset_type], cr));
1201 }
1202
1203 /* ARGSUSED */
1204 static int
1205 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1206 {
1207 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1208 NULL, cr));
1209 }
1210
1211 /* ARGSUSED */
1212 static int
1213 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1214 {
1215 nvpair_t *pair;
1216 nvlist_t *holds;
1217 int error;
1218
1219 error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1220 if (error != 0)
1221 return (SET_ERROR(EINVAL));
1222
1223 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1224 pair = nvlist_next_nvpair(holds, pair)) {
1225 char fsname[MAXNAMELEN];
1226 error = dmu_fsname(nvpair_name(pair), fsname);
1227 if (error != 0)
1228 return (error);
1229 error = zfs_secpolicy_write_perms(fsname,
1230 ZFS_DELEG_PERM_HOLD, cr);
1231 if (error != 0)
1232 return (error);
1233 }
1234 return (0);
1235 }
1236
1237 /* ARGSUSED */
1238 static int
1239 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1240 {
1241 nvpair_t *pair;
1242 int error;
1243
1244 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1245 pair = nvlist_next_nvpair(innvl, pair)) {
1246 char fsname[MAXNAMELEN];
1247 error = dmu_fsname(nvpair_name(pair), fsname);
1248 if (error != 0)
1249 return (error);
1250 error = zfs_secpolicy_write_perms(fsname,
1251 ZFS_DELEG_PERM_RELEASE, cr);
1252 if (error != 0)
1253 return (error);
1254 }
1255 return (0);
1256 }
1257
1258 /*
1259 * Policy for allowing temporary snapshots to be taken or released
1260 */
1261 static int
1262 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1263 {
1264 /*
1265 * A temporary snapshot is the same as a snapshot,
1266 * hold, destroy and release all rolled into one.
1267 * Delegated diff alone is sufficient that we allow this.
1268 */
1269 int error;
1270
1271 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1272 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1273 return (0);
1274
1275 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1276 if (error == 0)
1277 error = zfs_secpolicy_hold(zc, innvl, cr);
1278 if (error == 0)
1279 error = zfs_secpolicy_release(zc, innvl, cr);
1280 if (error == 0)
1281 error = zfs_secpolicy_destroy(zc, innvl, cr);
1282 return (error);
1283 }
1284
1285 /*
1286 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1287 */
1288 static int
1289 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1290 {
1291 char *packed;
1292 int error;
1293 nvlist_t *list = NULL;
1294
1295 /*
1296 * Read in and unpack the user-supplied nvlist.
1297 */
1298 if (size == 0)
1299 return (SET_ERROR(EINVAL));
1300
1301 packed = kmem_alloc(size, KM_SLEEP);
1302
1303 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1304 iflag)) != 0) {
1305 kmem_free(packed, size);
1306 return (SET_ERROR(EFAULT));
1307 }
1308
1309 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1310 kmem_free(packed, size);
1311 return (error);
1312 }
1313
1314 kmem_free(packed, size);
1315
1316 *nvp = list;
1317 return (0);
1318 }
1319
1320 /*
1321 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1322 * Entries will be removed from the end of the nvlist, and one int32 entry
1323 * named "N_MORE_ERRORS" will be added indicating how many entries were
1324 * removed.
1325 */
1326 static int
1327 nvlist_smush(nvlist_t *errors, size_t max)
1328 {
1329 size_t size;
1330
1331 size = fnvlist_size(errors);
1332
1333 if (size > max) {
1334 nvpair_t *more_errors;
1335 int n = 0;
1336
1337 if (max < 1024)
1338 return (SET_ERROR(ENOMEM));
1339
1340 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1341 more_errors = nvlist_prev_nvpair(errors, NULL);
1342
1343 do {
1344 nvpair_t *pair = nvlist_prev_nvpair(errors,
1345 more_errors);
1346 fnvlist_remove_nvpair(errors, pair);
1347 n++;
1348 size = fnvlist_size(errors);
1349 } while (size > max);
1350
1351 fnvlist_remove_nvpair(errors, more_errors);
1352 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1353 ASSERT3U(fnvlist_size(errors), <=, max);
1354 }
1355
1356 return (0);
1357 }
1358
1359 static int
1360 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1361 {
1362 char *packed = NULL;
1363 int error = 0;
1364 size_t size;
1365
1366 size = fnvlist_size(nvl);
1367
1368 if (size > zc->zc_nvlist_dst_size) {
1369 error = SET_ERROR(ENOMEM);
1370 } else {
1371 packed = fnvlist_pack(nvl, &size);
1372 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1373 size, zc->zc_iflags) != 0)
1374 error = SET_ERROR(EFAULT);
1375 fnvlist_pack_free(packed, size);
1376 }
1377
1378 zc->zc_nvlist_dst_size = size;
1379 zc->zc_nvlist_dst_filled = B_TRUE;
1380 return (error);
1381 }
1382
1383 static int
1384 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1385 {
1386 objset_t *os;
1387 int error;
1388
1389 error = dmu_objset_hold(dsname, FTAG, &os);
1390 if (error != 0)
1391 return (error);
1392 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1393 dmu_objset_rele(os, FTAG);
1394 return (SET_ERROR(EINVAL));
1395 }
1396
1397 mutex_enter(&os->os_user_ptr_lock);
1398 *zfvp = dmu_objset_get_user(os);
1399 if (*zfvp) {
1400 VFS_HOLD((*zfvp)->z_vfs);
1401 } else {
1402 error = SET_ERROR(ESRCH);
1403 }
1404 mutex_exit(&os->os_user_ptr_lock);
1405 dmu_objset_rele(os, FTAG);
1406 return (error);
1407 }
1408
1409 /*
1410 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1411 * case its z_vfs will be NULL, and it will be opened as the owner.
1412 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1413 * which prevents all vnode ops from running.
1414 */
1415 static int
1416 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1417 {
1418 int error = 0;
1419
1420 if (getzfsvfs(name, zfvp) != 0)
1421 error = zfsvfs_create(name, zfvp);
1422 if (error == 0) {
1423 rrm_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1424 RW_READER, tag);
1425 if ((*zfvp)->z_unmounted) {
1426 /*
1427 * XXX we could probably try again, since the unmounting
1428 * thread should be just about to disassociate the
1429 * objset from the zfsvfs.
1430 */
1431 rrm_exit(&(*zfvp)->z_teardown_lock, tag);
1432 return (SET_ERROR(EBUSY));
1433 }
1434 }
1435 return (error);
1436 }
1437
1438 static void
1439 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1440 {
1441 rrm_exit(&zfsvfs->z_teardown_lock, tag);
1442
1443 if (zfsvfs->z_vfs) {
1444 VFS_RELE(zfsvfs->z_vfs);
1445 } else {
1446 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1447 zfsvfs_free(zfsvfs);
1448 }
1449 }
1450
1451 static int
1452 zfs_ioc_pool_create(zfs_cmd_t *zc)
1453 {
1454 int error;
1455 nvlist_t *config, *props = NULL;
1456 nvlist_t *rootprops = NULL;
1457 nvlist_t *zplprops = NULL;
1458
1459 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1460 zc->zc_iflags, &config))
1461 return (error);
1462
1463 if (zc->zc_nvlist_src_size != 0 && (error =
1464 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1465 zc->zc_iflags, &props))) {
1466 nvlist_free(config);
1467 return (error);
1468 }
1469
1470 if (props) {
1471 nvlist_t *nvl = NULL;
1472 uint64_t version = SPA_VERSION;
1473
1474 (void) nvlist_lookup_uint64(props,
1475 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1476 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1477 error = SET_ERROR(EINVAL);
1478 goto pool_props_bad;
1479 }
1480 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1481 if (nvl) {
1482 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1483 if (error != 0) {
1484 nvlist_free(config);
1485 nvlist_free(props);
1486 return (error);
1487 }
1488 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1489 }
1490 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1491 error = zfs_fill_zplprops_root(version, rootprops,
1492 zplprops, NULL);
1493 if (error != 0)
1494 goto pool_props_bad;
1495 }
1496
1497 error = spa_create(zc->zc_name, config, props, zplprops);
1498
1499 /*
1500 * Set the remaining root properties
1501 */
1502 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1503 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1504 (void) spa_destroy(zc->zc_name);
1505
1506 pool_props_bad:
1507 nvlist_free(rootprops);
1508 nvlist_free(zplprops);
1509 nvlist_free(config);
1510 nvlist_free(props);
1511
1512 return (error);
1513 }
1514
1515 static int
1516 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1517 {
1518 int error;
1519 zfs_log_history(zc);
1520 error = spa_destroy(zc->zc_name);
1521 if (error == 0)
1522 zvol_remove_minors(zc->zc_name);
1523 return (error);
1524 }
1525
1526 static int
1527 zfs_ioc_pool_import(zfs_cmd_t *zc)
1528 {
1529 nvlist_t *config, *props = NULL;
1530 uint64_t guid;
1531 int error;
1532
1533 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1534 zc->zc_iflags, &config)) != 0)
1535 return (error);
1536
1537 if (zc->zc_nvlist_src_size != 0 && (error =
1538 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1539 zc->zc_iflags, &props))) {
1540 nvlist_free(config);
1541 return (error);
1542 }
1543
1544 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1545 guid != zc->zc_guid)
1546 error = SET_ERROR(EINVAL);
1547 else
1548 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1549
1550 if (zc->zc_nvlist_dst != 0) {
1551 int err;
1552
1553 if ((err = put_nvlist(zc, config)) != 0)
1554 error = err;
1555 }
1556
1557 nvlist_free(config);
1558
1559 if (props)
1560 nvlist_free(props);
1561
1562 return (error);
1563 }
1564
1565 static int
1566 zfs_ioc_pool_export(zfs_cmd_t *zc)
1567 {
1568 int error;
1569 boolean_t force = (boolean_t)zc->zc_cookie;
1570 boolean_t hardforce = (boolean_t)zc->zc_guid;
1571
1572 zfs_log_history(zc);
1573 error = spa_export(zc->zc_name, NULL, force, hardforce);
1574 if (error == 0)
1575 zvol_remove_minors(zc->zc_name);
1576 return (error);
1577 }
1578
1579 static int
1580 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1581 {
1582 nvlist_t *configs;
1583 int error;
1584
1585 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1586 return (SET_ERROR(EEXIST));
1587
1588 error = put_nvlist(zc, configs);
1589
1590 nvlist_free(configs);
1591
1592 return (error);
1593 }
1594
1595 /*
1596 * inputs:
1597 * zc_name name of the pool
1598 *
1599 * outputs:
1600 * zc_cookie real errno
1601 * zc_nvlist_dst config nvlist
1602 * zc_nvlist_dst_size size of config nvlist
1603 */
1604 static int
1605 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1606 {
1607 nvlist_t *config;
1608 int error;
1609 int ret = 0;
1610
1611 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1612 sizeof (zc->zc_value));
1613
1614 if (config != NULL) {
1615 ret = put_nvlist(zc, config);
1616 nvlist_free(config);
1617
1618 /*
1619 * The config may be present even if 'error' is non-zero.
1620 * In this case we return success, and preserve the real errno
1621 * in 'zc_cookie'.
1622 */
1623 zc->zc_cookie = error;
1624 } else {
1625 ret = error;
1626 }
1627
1628 return (ret);
1629 }
1630
1631 /*
1632 * Try to import the given pool, returning pool stats as appropriate so that
1633 * user land knows which devices are available and overall pool health.
1634 */
1635 static int
1636 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1637 {
1638 nvlist_t *tryconfig, *config;
1639 int error;
1640
1641 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1642 zc->zc_iflags, &tryconfig)) != 0)
1643 return (error);
1644
1645 config = spa_tryimport(tryconfig);
1646
1647 nvlist_free(tryconfig);
1648
1649 if (config == NULL)
1650 return (SET_ERROR(EINVAL));
1651
1652 error = put_nvlist(zc, config);
1653 nvlist_free(config);
1654
1655 return (error);
1656 }
1657
1658 /*
1659 * inputs:
1660 * zc_name name of the pool
1661 * zc_cookie scan func (pool_scan_func_t)
1662 */
1663 static int
1664 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1665 {
1666 spa_t *spa;
1667 int error;
1668
1669 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1670 return (error);
1671
1672 if (zc->zc_cookie == POOL_SCAN_NONE)
1673 error = spa_scan_stop(spa);
1674 else
1675 error = spa_scan(spa, zc->zc_cookie);
1676
1677 spa_close(spa, FTAG);
1678
1679 return (error);
1680 }
1681
1682 static int
1683 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1684 {
1685 spa_t *spa;
1686 int error;
1687
1688 error = spa_open(zc->zc_name, &spa, FTAG);
1689 if (error == 0) {
1690 spa_freeze(spa);
1691 spa_close(spa, FTAG);
1692 }
1693 return (error);
1694 }
1695
1696 static int
1697 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1698 {
1699 spa_t *spa;
1700 int error;
1701
1702 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1703 return (error);
1704
1705 if (zc->zc_cookie < spa_version(spa) ||
1706 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1707 spa_close(spa, FTAG);
1708 return (SET_ERROR(EINVAL));
1709 }
1710
1711 spa_upgrade(spa, zc->zc_cookie);
1712 spa_close(spa, FTAG);
1713
1714 return (error);
1715 }
1716
1717 static int
1718 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1719 {
1720 spa_t *spa;
1721 char *hist_buf;
1722 uint64_t size;
1723 int error;
1724
1725 if ((size = zc->zc_history_len) == 0)
1726 return (SET_ERROR(EINVAL));
1727
1728 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1729 return (error);
1730
1731 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1732 spa_close(spa, FTAG);
1733 return (SET_ERROR(ENOTSUP));
1734 }
1735
1736 hist_buf = kmem_alloc(size, KM_SLEEP);
1737 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1738 &zc->zc_history_len, hist_buf)) == 0) {
1739 error = ddi_copyout(hist_buf,
1740 (void *)(uintptr_t)zc->zc_history,
1741 zc->zc_history_len, zc->zc_iflags);
1742 }
1743
1744 spa_close(spa, FTAG);
1745 kmem_free(hist_buf, size);
1746 return (error);
1747 }
1748
1749 static int
1750 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1751 {
1752 spa_t *spa;
1753 int error;
1754
1755 error = spa_open(zc->zc_name, &spa, FTAG);
1756 if (error == 0) {
1757 error = spa_change_guid(spa);
1758 spa_close(spa, FTAG);
1759 }
1760 return (error);
1761 }
1762
1763 static int
1764 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1765 {
1766 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1767 }
1768
1769 /*
1770 * inputs:
1771 * zc_name name of filesystem
1772 * zc_obj object to find
1773 *
1774 * outputs:
1775 * zc_value name of object
1776 */
1777 static int
1778 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1779 {
1780 objset_t *os;
1781 int error;
1782
1783 /* XXX reading from objset not owned */
1784 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1785 return (error);
1786 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1787 dmu_objset_rele(os, FTAG);
1788 return (SET_ERROR(EINVAL));
1789 }
1790 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1791 sizeof (zc->zc_value));
1792 dmu_objset_rele(os, FTAG);
1793
1794 return (error);
1795 }
1796
1797 /*
1798 * inputs:
1799 * zc_name name of filesystem
1800 * zc_obj object to find
1801 *
1802 * outputs:
1803 * zc_stat stats on object
1804 * zc_value path to object
1805 */
1806 static int
1807 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1808 {
1809 objset_t *os;
1810 int error;
1811
1812 /* XXX reading from objset not owned */
1813 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1814 return (error);
1815 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1816 dmu_objset_rele(os, FTAG);
1817 return (SET_ERROR(EINVAL));
1818 }
1819 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1820 sizeof (zc->zc_value));
1821 dmu_objset_rele(os, FTAG);
1822
1823 return (error);
1824 }
1825
1826 static int
1827 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1828 {
1829 spa_t *spa;
1830 int error;
1831 nvlist_t *config, **l2cache, **spares;
1832 uint_t nl2cache = 0, nspares = 0;
1833
1834 error = spa_open(zc->zc_name, &spa, FTAG);
1835 if (error != 0)
1836 return (error);
1837
1838 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1839 zc->zc_iflags, &config);
1840 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1841 &l2cache, &nl2cache);
1842
1843 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1844 &spares, &nspares);
1845
1846 /*
1847 * A root pool with concatenated devices is not supported.
1848 * Thus, can not add a device to a root pool.
1849 *
1850 * Intent log device can not be added to a rootpool because
1851 * during mountroot, zil is replayed, a seperated log device
1852 * can not be accessed during the mountroot time.
1853 *
1854 * l2cache and spare devices are ok to be added to a rootpool.
1855 */
1856 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1857 nvlist_free(config);
1858 spa_close(spa, FTAG);
1859 return (SET_ERROR(EDOM));
1860 }
1861
1862 if (error == 0) {
1863 error = spa_vdev_add(spa, config);
1864 nvlist_free(config);
1865 }
1866 spa_close(spa, FTAG);
1867 return (error);
1868 }
1869
1870 /*
1871 * inputs:
1872 * zc_name name of the pool
1873 * zc_nvlist_conf nvlist of devices to remove
1874 * zc_cookie to stop the remove?
1875 */
1876 static int
1877 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1878 {
1879 spa_t *spa;
1880 int error;
1881
1882 error = spa_open(zc->zc_name, &spa, FTAG);
1883 if (error != 0)
1884 return (error);
1885 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1886 spa_close(spa, FTAG);
1887 return (error);
1888 }
1889
1890 static int
1891 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1892 {
1893 spa_t *spa;
1894 int error;
1895 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1896
1897 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1898 return (error);
1899 switch (zc->zc_cookie) {
1900 case VDEV_STATE_ONLINE:
1901 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1902 break;
1903
1904 case VDEV_STATE_OFFLINE:
1905 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1906 break;
1907
1908 case VDEV_STATE_FAULTED:
1909 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1910 zc->zc_obj != VDEV_AUX_EXTERNAL)
1911 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1912
1913 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1914 break;
1915
1916 case VDEV_STATE_DEGRADED:
1917 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1918 zc->zc_obj != VDEV_AUX_EXTERNAL)
1919 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1920
1921 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1922 break;
1923
1924 default:
1925 error = SET_ERROR(EINVAL);
1926 }
1927 zc->zc_cookie = newstate;
1928 spa_close(spa, FTAG);
1929 return (error);
1930 }
1931
1932 static int
1933 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1934 {
1935 spa_t *spa;
1936 int replacing = zc->zc_cookie;
1937 nvlist_t *config;
1938 int error;
1939
1940 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1941 return (error);
1942
1943 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1944 zc->zc_iflags, &config)) == 0) {
1945 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1946 nvlist_free(config);
1947 }
1948
1949 spa_close(spa, FTAG);
1950 return (error);
1951 }
1952
1953 static int
1954 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1955 {
1956 spa_t *spa;
1957 int error;
1958
1959 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1960 return (error);
1961
1962 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1963
1964 spa_close(spa, FTAG);
1965 return (error);
1966 }
1967
1968 static int
1969 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1970 {
1971 spa_t *spa;
1972 nvlist_t *config, *props = NULL;
1973 int error;
1974 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1975
1976 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1977 return (error);
1978
1979 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1980 zc->zc_iflags, &config)) {
1981 spa_close(spa, FTAG);
1982 return (error);
1983 }
1984
1985 if (zc->zc_nvlist_src_size != 0 && (error =
1986 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1987 zc->zc_iflags, &props))) {
1988 spa_close(spa, FTAG);
1989 nvlist_free(config);
1990 return (error);
1991 }
1992
1993 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1994
1995 spa_close(spa, FTAG);
1996
1997 nvlist_free(config);
1998 nvlist_free(props);
1999
2000 return (error);
2001 }
2002
2003 static int
2004 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
2005 {
2006 spa_t *spa;
2007 char *path = zc->zc_value;
2008 uint64_t guid = zc->zc_guid;
2009 int error;
2010
2011 error = spa_open(zc->zc_name, &spa, FTAG);
2012 if (error != 0)
2013 return (error);
2014
2015 error = spa_vdev_setpath(spa, guid, path);
2016 spa_close(spa, FTAG);
2017 return (error);
2018 }
2019
2020 static int
2021 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
2022 {
2023 spa_t *spa;
2024 char *fru = zc->zc_value;
2025 uint64_t guid = zc->zc_guid;
2026 int error;
2027
2028 error = spa_open(zc->zc_name, &spa, FTAG);
2029 if (error != 0)
2030 return (error);
2031
2032 error = spa_vdev_setfru(spa, guid, fru);
2033 spa_close(spa, FTAG);
2034 return (error);
2035 }
2036
2037 static int
2038 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
2039 {
2040 int error = 0;
2041 nvlist_t *nv;
2042
2043 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2044
2045 if (zc->zc_nvlist_dst != 0 &&
2046 (error = dsl_prop_get_all(os, &nv)) == 0) {
2047 dmu_objset_stats(os, nv);
2048 /*
2049 * NB: zvol_get_stats() will read the objset contents,
2050 * which we aren't supposed to do with a
2051 * DS_MODE_USER hold, because it could be
2052 * inconsistent. So this is a bit of a workaround...
2053 * XXX reading with out owning
2054 */
2055 if (!zc->zc_objset_stats.dds_inconsistent &&
2056 dmu_objset_type(os) == DMU_OST_ZVOL) {
2057 error = zvol_get_stats(os, nv);
2058 if (error == EIO)
2059 return (error);
2060 VERIFY0(error);
2061 }
2062 error = put_nvlist(zc, nv);
2063 nvlist_free(nv);
2064 }
2065
2066 return (error);
2067 }
2068
2069 /*
2070 * inputs:
2071 * zc_name name of filesystem
2072 * zc_nvlist_dst_size size of buffer for property nvlist
2073 *
2074 * outputs:
2075 * zc_objset_stats stats
2076 * zc_nvlist_dst property nvlist
2077 * zc_nvlist_dst_size size of property nvlist
2078 */
2079 static int
2080 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2081 {
2082 objset_t *os;
2083 int error;
2084
2085 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2086 if (error == 0) {
2087 error = zfs_ioc_objset_stats_impl(zc, os);
2088 dmu_objset_rele(os, FTAG);
2089 }
2090
2091 return (error);
2092 }
2093
2094 /*
2095 * inputs:
2096 * zc_name name of filesystem
2097 * zc_nvlist_dst_size size of buffer for property nvlist
2098 *
2099 * outputs:
2100 * zc_nvlist_dst received property nvlist
2101 * zc_nvlist_dst_size size of received property nvlist
2102 *
2103 * Gets received properties (distinct from local properties on or after
2104 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2105 * local property values.
2106 */
2107 static int
2108 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2109 {
2110 int error = 0;
2111 nvlist_t *nv;
2112
2113 /*
2114 * Without this check, we would return local property values if the
2115 * caller has not already received properties on or after
2116 * SPA_VERSION_RECVD_PROPS.
2117 */
2118 if (!dsl_prop_get_hasrecvd(zc->zc_name))
2119 return (SET_ERROR(ENOTSUP));
2120
2121 if (zc->zc_nvlist_dst != 0 &&
2122 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2123 error = put_nvlist(zc, nv);
2124 nvlist_free(nv);
2125 }
2126
2127 return (error);
2128 }
2129
2130 static int
2131 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2132 {
2133 uint64_t value;
2134 int error;
2135
2136 /*
2137 * zfs_get_zplprop() will either find a value or give us
2138 * the default value (if there is one).
2139 */
2140 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2141 return (error);
2142 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2143 return (0);
2144 }
2145
2146 /*
2147 * inputs:
2148 * zc_name name of filesystem
2149 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2150 *
2151 * outputs:
2152 * zc_nvlist_dst zpl property nvlist
2153 * zc_nvlist_dst_size size of zpl property nvlist
2154 */
2155 static int
2156 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2157 {
2158 objset_t *os;
2159 int err;
2160
2161 /* XXX reading without owning */
2162 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2163 return (err);
2164
2165 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2166
2167 /*
2168 * NB: nvl_add_zplprop() will read the objset contents,
2169 * which we aren't supposed to do with a DS_MODE_USER
2170 * hold, because it could be inconsistent.
2171 */
2172 if (zc->zc_nvlist_dst != NULL &&
2173 !zc->zc_objset_stats.dds_inconsistent &&
2174 dmu_objset_type(os) == DMU_OST_ZFS) {
2175 nvlist_t *nv;
2176
2177 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2178 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2179 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2180 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2181 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2182 err = put_nvlist(zc, nv);
2183 nvlist_free(nv);
2184 } else {
2185 err = SET_ERROR(ENOENT);
2186 }
2187 dmu_objset_rele(os, FTAG);
2188 return (err);
2189 }
2190
2191 static boolean_t
2192 dataset_name_hidden(const char *name)
2193 {
2194 /*
2195 * Skip over datasets that are not visible in this zone,
2196 * internal datasets (which have a $ in their name), and
2197 * temporary datasets (which have a % in their name).
2198 */
2199 if (strchr(name, '$') != NULL)
2200 return (B_TRUE);
2201 if (strchr(name, '%') != NULL)
2202 return (B_TRUE);
2203 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2204 return (B_TRUE);
2205 return (B_FALSE);
2206 }
2207
2208 /*
2209 * inputs:
2210 * zc_name name of filesystem
2211 * zc_cookie zap cursor
2212 * zc_nvlist_dst_size size of buffer for property nvlist
2213 *
2214 * outputs:
2215 * zc_name name of next filesystem
2216 * zc_cookie zap cursor
2217 * zc_objset_stats stats
2218 * zc_nvlist_dst property nvlist
2219 * zc_nvlist_dst_size size of property nvlist
2220 */
2221 static int
2222 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2223 {
2224 objset_t *os;
2225 int error;
2226 char *p;
2227 size_t orig_len = strlen(zc->zc_name);
2228
2229 top:
2230 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2231 if (error == ENOENT)
2232 error = SET_ERROR(ESRCH);
2233 return (error);
2234 }
2235
2236 p = strrchr(zc->zc_name, '/');
2237 if (p == NULL || p[1] != '\0')
2238 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2239 p = zc->zc_name + strlen(zc->zc_name);
2240
2241 do {
2242 error = dmu_dir_list_next(os,
2243 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2244 NULL, &zc->zc_cookie);
2245 if (error == ENOENT)
2246 error = SET_ERROR(ESRCH);
2247 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2248 dmu_objset_rele(os, FTAG);
2249
2250 /*
2251 * If it's an internal dataset (ie. with a '$' in its name),
2252 * don't try to get stats for it, otherwise we'll return ENOENT.
2253 */
2254 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2255 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2256 if (error == ENOENT) {
2257 /* We lost a race with destroy, get the next one. */
2258 zc->zc_name[orig_len] = '\0';
2259 goto top;
2260 }
2261 }
2262 return (error);
2263 }
2264
2265 /*
2266 * inputs:
2267 * zc_name name of filesystem
2268 * zc_cookie zap cursor
2269 * zc_nvlist_dst_size size of buffer for property nvlist
2270 *
2271 * outputs:
2272 * zc_name name of next snapshot
2273 * zc_objset_stats stats
2274 * zc_nvlist_dst property nvlist
2275 * zc_nvlist_dst_size size of property nvlist
2276 */
2277 static int
2278 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2279 {
2280 objset_t *os;
2281 int error;
2282
2283 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2284 if (error != 0) {
2285 return (error == ENOENT ? ESRCH : error);
2286 }
2287
2288 /*
2289 * A dataset name of maximum length cannot have any snapshots,
2290 * so exit immediately.
2291 */
2292 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2293 dmu_objset_rele(os, FTAG);
2294 return (SET_ERROR(ESRCH));
2295 }
2296
2297 error = dmu_snapshot_list_next(os,
2298 sizeof (zc->zc_name) - strlen(zc->zc_name),
2299 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2300 NULL);
2301
2302 if (error == 0) {
2303 dsl_dataset_t *ds;
2304 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2305
2306 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2307 if (error == 0) {
2308 objset_t *ossnap;
2309
2310 error = dmu_objset_from_ds(ds, &ossnap);
2311 if (error == 0)
2312 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2313 dsl_dataset_rele(ds, FTAG);
2314 }
2315 } else if (error == ENOENT) {
2316 error = SET_ERROR(ESRCH);
2317 }
2318
2319 dmu_objset_rele(os, FTAG);
2320 /* if we failed, undo the @ that we tacked on to zc_name */
2321 if (error != 0)
2322 *strchr(zc->zc_name, '@') = '\0';
2323 return (error);
2324 }
2325
2326 static int
2327 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2328 {
2329 const char *propname = nvpair_name(pair);
2330 uint64_t *valary;
2331 unsigned int vallen;
2332 const char *domain;
2333 char *dash;
2334 zfs_userquota_prop_t type;
2335 uint64_t rid;
2336 uint64_t quota;
2337 zfsvfs_t *zfsvfs;
2338 int err;
2339
2340 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2341 nvlist_t *attrs;
2342 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2343 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2344 &pair) != 0)
2345 return (SET_ERROR(EINVAL));
2346 }
2347
2348 /*
2349 * A correctly constructed propname is encoded as
2350 * userquota@<rid>-<domain>.
2351 */
2352 if ((dash = strchr(propname, '-')) == NULL ||
2353 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2354 vallen != 3)
2355 return (SET_ERROR(EINVAL));
2356
2357 domain = dash + 1;
2358 type = valary[0];
2359 rid = valary[1];
2360 quota = valary[2];
2361
2362 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2363 if (err == 0) {
2364 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2365 zfsvfs_rele(zfsvfs, FTAG);
2366 }
2367
2368 return (err);
2369 }
2370
2371 /*
2372 * If the named property is one that has a special function to set its value,
2373 * return 0 on success and a positive error code on failure; otherwise if it is
2374 * not one of the special properties handled by this function, return -1.
2375 *
2376 * XXX: It would be better for callers of the property interface if we handled
2377 * these special cases in dsl_prop.c (in the dsl layer).
2378 */
2379 static int
2380 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2381 nvpair_t *pair)
2382 {
2383 const char *propname = nvpair_name(pair);
2384 zfs_prop_t prop = zfs_name_to_prop(propname);
2385 uint64_t intval;
2386 int err = -1;
2387
2388 if (prop == ZPROP_INVAL) {
2389 if (zfs_prop_userquota(propname))
2390 return (zfs_prop_set_userquota(dsname, pair));
2391 return (-1);
2392 }
2393
2394 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2395 nvlist_t *attrs;
2396 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2397 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2398 &pair) == 0);
2399 }
2400
2401 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2402 return (-1);
2403
2404 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2405
2406 switch (prop) {
2407 case ZFS_PROP_QUOTA:
2408 err = dsl_dir_set_quota(dsname, source, intval);
2409 break;
2410 case ZFS_PROP_REFQUOTA:
2411 err = dsl_dataset_set_refquota(dsname, source, intval);
2412 break;
2413 case ZFS_PROP_FILESYSTEM_LIMIT:
2414 case ZFS_PROP_SNAPSHOT_LIMIT:
2415 if (intval == UINT64_MAX) {
2416 /* clearing the limit, just do it */
2417 err = 0;
2418 } else {
2419 err = dsl_dir_activate_fs_ss_limit(dsname);
2420 }
2421 /*
2422 * Set err to -1 to force the zfs_set_prop_nvlist code down the
2423 * default path to set the value in the nvlist.
2424 */
2425 if (err == 0)
2426 err = -1;
2427 break;
2428 case ZFS_PROP_RESERVATION:
2429 err = dsl_dir_set_reservation(dsname, source, intval);
2430 break;
2431 case ZFS_PROP_REFRESERVATION:
2432 err = dsl_dataset_set_refreservation(dsname, source, intval);
2433 break;
2434 case ZFS_PROP_VOLSIZE:
2435 err = zvol_set_volsize(dsname, intval);
2436 break;
2437 case ZFS_PROP_VERSION:
2438 {
2439 zfsvfs_t *zfsvfs;
2440
2441 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2442 break;
2443
2444 err = zfs_set_version(zfsvfs, intval);
2445 zfsvfs_rele(zfsvfs, FTAG);
2446
2447 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2448 zfs_cmd_t *zc;
2449
2450 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2451 (void) strcpy(zc->zc_name, dsname);
2452 (void) zfs_ioc_userspace_upgrade(zc);
2453 kmem_free(zc, sizeof (zfs_cmd_t));
2454 }
2455 break;
2456 }
2457 default:
2458 err = -1;
2459 }
2460
2461 return (err);
2462 }
2463
2464 /*
2465 * This function is best effort. If it fails to set any of the given properties,
2466 * it continues to set as many as it can and returns the last error
2467 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2468 * with the list of names of all the properties that failed along with the
2469 * corresponding error numbers.
2470 *
2471 * If every property is set successfully, zero is returned and errlist is not
2472 * modified.
2473 */
2474 int
2475 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2476 nvlist_t *errlist)
2477 {
2478 nvpair_t *pair;
2479 nvpair_t *propval;
2480 int rv = 0;
2481 uint64_t intval;
2482 char *strval;
2483 nvlist_t *genericnvl = fnvlist_alloc();
2484 nvlist_t *retrynvl = fnvlist_alloc();
2485
2486 retry:
2487 pair = NULL;
2488 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2489 const char *propname = nvpair_name(pair);
2490 zfs_prop_t prop = zfs_name_to_prop(propname);
2491 int err = 0;
2492
2493 /* decode the property value */
2494 propval = pair;
2495 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2496 nvlist_t *attrs;
2497 attrs = fnvpair_value_nvlist(pair);
2498 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2499 &propval) != 0)
2500 err = SET_ERROR(EINVAL);
2501 }
2502
2503 /* Validate value type */
2504 if (err == 0 && prop == ZPROP_INVAL) {
2505 if (zfs_prop_user(propname)) {
2506 if (nvpair_type(propval) != DATA_TYPE_STRING)
2507 err = SET_ERROR(EINVAL);
2508 } else if (zfs_prop_userquota(propname)) {
2509 if (nvpair_type(propval) !=
2510 DATA_TYPE_UINT64_ARRAY)
2511 err = SET_ERROR(EINVAL);
2512 } else {
2513 err = SET_ERROR(EINVAL);
2514 }
2515 } else if (err == 0) {
2516 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2517 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2518 err = SET_ERROR(EINVAL);
2519 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2520 const char *unused;
2521
2522 intval = fnvpair_value_uint64(propval);
2523
2524 switch (zfs_prop_get_type(prop)) {
2525 case PROP_TYPE_NUMBER:
2526 break;
2527 case PROP_TYPE_STRING:
2528 err = SET_ERROR(EINVAL);
2529 break;
2530 case PROP_TYPE_INDEX:
2531 if (zfs_prop_index_to_string(prop,
2532 intval, &unused) != 0)
2533 err = SET_ERROR(EINVAL);
2534 break;
2535 default:
2536 cmn_err(CE_PANIC,
2537 "unknown property type");
2538 }
2539 } else {
2540 err = SET_ERROR(EINVAL);
2541 }
2542 }
2543
2544 /* Validate permissions */
2545 if (err == 0)
2546 err = zfs_check_settable(dsname, pair, CRED());
2547
2548 if (err == 0) {
2549 err = zfs_prop_set_special(dsname, source, pair);
2550 if (err == -1) {
2551 /*
2552 * For better performance we build up a list of
2553 * properties to set in a single transaction.
2554 */
2555 err = nvlist_add_nvpair(genericnvl, pair);
2556 } else if (err != 0 && nvl != retrynvl) {
2557 /*
2558 * This may be a spurious error caused by
2559 * receiving quota and reservation out of order.
2560 * Try again in a second pass.
2561 */
2562 err = nvlist_add_nvpair(retrynvl, pair);
2563 }
2564 }
2565
2566 if (err != 0) {
2567 if (errlist != NULL)
2568 fnvlist_add_int32(errlist, propname, err);
2569 rv = err;
2570 }
2571 }
2572
2573 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2574 nvl = retrynvl;
2575 goto retry;
2576 }
2577
2578 if (!nvlist_empty(genericnvl) &&
2579 dsl_props_set(dsname, source, genericnvl) != 0) {
2580 /*
2581 * If this fails, we still want to set as many properties as we
2582 * can, so try setting them individually.
2583 */
2584 pair = NULL;
2585 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2586 const char *propname = nvpair_name(pair);
2587 int err = 0;
2588
2589 propval = pair;
2590 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2591 nvlist_t *attrs;
2592 attrs = fnvpair_value_nvlist(pair);
2593 propval = fnvlist_lookup_nvpair(attrs,
2594 ZPROP_VALUE);
2595 }
2596
2597 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2598 strval = fnvpair_value_string(propval);
2599 err = dsl_prop_set_string(dsname, propname,
2600 source, strval);
2601 } else {
2602 intval = fnvpair_value_uint64(propval);
2603 err = dsl_prop_set_int(dsname, propname, source,
2604 intval);
2605 }
2606
2607 if (err != 0) {
2608 if (errlist != NULL) {
2609 fnvlist_add_int32(errlist, propname,
2610 err);
2611 }
2612 rv = err;
2613 }
2614 }
2615 }
2616 nvlist_free(genericnvl);
2617 nvlist_free(retrynvl);
2618
2619 return (rv);
2620 }
2621
2622 /*
2623 * Check that all the properties are valid user properties.
2624 */
2625 static int
2626 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2627 {
2628 nvpair_t *pair = NULL;
2629 int error = 0;
2630
2631 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2632 const char *propname = nvpair_name(pair);
2633
2634 if (!zfs_prop_user(propname) ||
2635 nvpair_type(pair) != DATA_TYPE_STRING)
2636 return (SET_ERROR(EINVAL));
2637
2638 if (error = zfs_secpolicy_write_perms(fsname,
2639 ZFS_DELEG_PERM_USERPROP, CRED()))
2640 return (error);
2641
2642 if (strlen(propname) >= ZAP_MAXNAMELEN)
2643 return (SET_ERROR(ENAMETOOLONG));
2644
2645 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN)
2646 return (E2BIG);
2647 }
2648 return (0);
2649 }
2650
2651 static void
2652 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2653 {
2654 nvpair_t *pair;
2655
2656 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2657
2658 pair = NULL;
2659 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2660 if (nvlist_exists(skipped, nvpair_name(pair)))
2661 continue;
2662
2663 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2664 }
2665 }
2666
2667 static int
2668 clear_received_props(const char *dsname, nvlist_t *props,
2669 nvlist_t *skipped)
2670 {
2671 int err = 0;
2672 nvlist_t *cleared_props = NULL;
2673 props_skip(props, skipped, &cleared_props);
2674 if (!nvlist_empty(cleared_props)) {
2675 /*
2676 * Acts on local properties until the dataset has received
2677 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2678 */
2679 zprop_source_t flags = (ZPROP_SRC_NONE |
2680 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2681 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2682 }
2683 nvlist_free(cleared_props);
2684 return (err);
2685 }
2686
2687 /*
2688 * inputs:
2689 * zc_name name of filesystem
2690 * zc_value name of property to set
2691 * zc_nvlist_src{_size} nvlist of properties to apply
2692 * zc_cookie received properties flag
2693 *
2694 * outputs:
2695 * zc_nvlist_dst{_size} error for each unapplied received property
2696 */
2697 static int
2698 zfs_ioc_set_prop(zfs_cmd_t *zc)
2699 {
2700 nvlist_t *nvl;
2701 boolean_t received = zc->zc_cookie;
2702 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2703 ZPROP_SRC_LOCAL);
2704 nvlist_t *errors;
2705 int error;
2706
2707 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2708 zc->zc_iflags, &nvl)) != 0)
2709 return (error);
2710
2711 if (received) {
2712 nvlist_t *origprops;
2713
2714 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2715 (void) clear_received_props(zc->zc_name,
2716 origprops, nvl);
2717 nvlist_free(origprops);
2718 }
2719
2720 error = dsl_prop_set_hasrecvd(zc->zc_name);
2721 }
2722
2723 errors = fnvlist_alloc();
2724 if (error == 0)
2725 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2726
2727 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2728 (void) put_nvlist(zc, errors);
2729 }
2730
2731 nvlist_free(errors);
2732 nvlist_free(nvl);
2733 return (error);
2734 }
2735
2736 /*
2737 * inputs:
2738 * zc_name name of filesystem
2739 * zc_value name of property to inherit
2740 * zc_cookie revert to received value if TRUE
2741 *
2742 * outputs: none
2743 */
2744 static int
2745 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2746 {
2747 const char *propname = zc->zc_value;
2748 zfs_prop_t prop = zfs_name_to_prop(propname);
2749 boolean_t received = zc->zc_cookie;
2750 zprop_source_t source = (received
2751 ? ZPROP_SRC_NONE /* revert to received value, if any */
2752 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2753
2754 if (received) {
2755 nvlist_t *dummy;
2756 nvpair_t *pair;
2757 zprop_type_t type;
2758 int err;
2759
2760 /*
2761 * zfs_prop_set_special() expects properties in the form of an
2762 * nvpair with type info.
2763 */
2764 if (prop == ZPROP_INVAL) {
2765 if (!zfs_prop_user(propname))
2766 return (SET_ERROR(EINVAL));
2767
2768 type = PROP_TYPE_STRING;
2769 } else if (prop == ZFS_PROP_VOLSIZE ||
2770 prop == ZFS_PROP_VERSION) {
2771 return (SET_ERROR(EINVAL));
2772 } else {
2773 type = zfs_prop_get_type(prop);
2774 }
2775
2776 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2777
2778 switch (type) {
2779 case PROP_TYPE_STRING:
2780 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2781 break;
2782 case PROP_TYPE_NUMBER:
2783 case PROP_TYPE_INDEX:
2784 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2785 break;
2786 default:
2787 nvlist_free(dummy);
2788 return (SET_ERROR(EINVAL));
2789 }
2790
2791 pair = nvlist_next_nvpair(dummy, NULL);
2792 err = zfs_prop_set_special(zc->zc_name, source, pair);
2793 nvlist_free(dummy);
2794 if (err != -1)
2795 return (err); /* special property already handled */
2796 } else {
2797 /*
2798 * Only check this in the non-received case. We want to allow
2799 * 'inherit -S' to revert non-inheritable properties like quota
2800 * and reservation to the received or default values even though
2801 * they are not considered inheritable.
2802 */
2803 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2804 return (SET_ERROR(EINVAL));
2805 }
2806
2807 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2808 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2809 }
2810
2811 static int
2812 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2813 {
2814 nvlist_t *props;
2815 spa_t *spa;
2816 int error;
2817 nvpair_t *pair;
2818
2819 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2820 zc->zc_iflags, &props))
2821 return (error);
2822
2823 /*
2824 * If the only property is the configfile, then just do a spa_lookup()
2825 * to handle the faulted case.
2826 */
2827 pair = nvlist_next_nvpair(props, NULL);
2828 if (pair != NULL && strcmp(nvpair_name(pair),
2829 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2830 nvlist_next_nvpair(props, pair) == NULL) {
2831 mutex_enter(&spa_namespace_lock);
2832 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2833 spa_configfile_set(spa, props, B_FALSE);
2834 spa_config_sync(spa, B_FALSE, B_TRUE);
2835 }
2836 mutex_exit(&spa_namespace_lock);
2837 if (spa != NULL) {
2838 nvlist_free(props);
2839 return (0);
2840 }
2841 }
2842
2843 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2844 nvlist_free(props);
2845 return (error);
2846 }
2847
2848 error = spa_prop_set(spa, props);
2849
2850 nvlist_free(props);
2851 spa_close(spa, FTAG);
2852
2853 return (error);
2854 }
2855
2856 static int
2857 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2858 {
2859 spa_t *spa;
2860 int error;
2861 nvlist_t *nvp = NULL;
2862
2863 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2864 /*
2865 * If the pool is faulted, there may be properties we can still
2866 * get (such as altroot and cachefile), so attempt to get them
2867 * anyway.
2868 */
2869 mutex_enter(&spa_namespace_lock);
2870 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2871 error = spa_prop_get(spa, &nvp);
2872 mutex_exit(&spa_namespace_lock);
2873 } else {
2874 error = spa_prop_get(spa, &nvp);
2875 spa_close(spa, FTAG);
2876 }
2877
2878 if (error == 0 && zc->zc_nvlist_dst != NULL)
2879 error = put_nvlist(zc, nvp);
2880 else
2881 error = SET_ERROR(EFAULT);
2882
2883 nvlist_free(nvp);
2884 return (error);
2885 }
2886
2887 /*
2888 * inputs:
2889 * zc_name name of filesystem
2890 * zc_nvlist_src{_size} nvlist of delegated permissions
2891 * zc_perm_action allow/unallow flag
2892 *
2893 * outputs: none
2894 */
2895 static int
2896 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2897 {
2898 int error;
2899 nvlist_t *fsaclnv = NULL;
2900
2901 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2902 zc->zc_iflags, &fsaclnv)) != 0)
2903 return (error);
2904
2905 /*
2906 * Verify nvlist is constructed correctly
2907 */
2908 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2909 nvlist_free(fsaclnv);
2910 return (SET_ERROR(EINVAL));
2911 }
2912
2913 /*
2914 * If we don't have PRIV_SYS_MOUNT, then validate
2915 * that user is allowed to hand out each permission in
2916 * the nvlist(s)
2917 */
2918
2919 error = secpolicy_zfs(CRED());
2920 if (error != 0) {
2921 if (zc->zc_perm_action == B_FALSE) {
2922 error = dsl_deleg_can_allow(zc->zc_name,
2923 fsaclnv, CRED());
2924 } else {
2925 error = dsl_deleg_can_unallow(zc->zc_name,
2926 fsaclnv, CRED());
2927 }
2928 }
2929
2930 if (error == 0)
2931 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2932
2933 nvlist_free(fsaclnv);
2934 return (error);
2935 }
2936
2937 /*
2938 * inputs:
2939 * zc_name name of filesystem
2940 *
2941 * outputs:
2942 * zc_nvlist_src{_size} nvlist of delegated permissions
2943 */
2944 static int
2945 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2946 {
2947 nvlist_t *nvp;
2948 int error;
2949
2950 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2951 error = put_nvlist(zc, nvp);
2952 nvlist_free(nvp);
2953 }
2954
2955 return (error);
2956 }
2957
2958 /*
2959 * Search the vfs list for a specified resource. Returns a pointer to it
2960 * or NULL if no suitable entry is found. The caller of this routine
2961 * is responsible for releasing the returned vfs pointer.
2962 */
2963 static vfs_t *
2964 zfs_get_vfs(const char *resource)
2965 {
2966 struct vfs *vfsp;
2967 struct vfs *vfs_found = NULL;
2968
2969 vfs_list_read_lock();
2970 vfsp = rootvfs;
2971 do {
2972 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2973 VFS_HOLD(vfsp);
2974 vfs_found = vfsp;
2975 break;
2976 }
2977 vfsp = vfsp->vfs_next;
2978 } while (vfsp != rootvfs);
2979 vfs_list_unlock();
2980 return (vfs_found);
2981 }
2982
2983 /* ARGSUSED */
2984 static void
2985 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2986 {
2987 zfs_creat_t *zct = arg;
2988
2989 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2990 }
2991
2992 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2993
2994 /*
2995 * inputs:
2996 * os parent objset pointer (NULL if root fs)
2997 * fuids_ok fuids allowed in this version of the spa?
2998 * sa_ok SAs allowed in this version of the spa?
2999 * createprops list of properties requested by creator
3000 *
3001 * outputs:
3002 * zplprops values for the zplprops we attach to the master node object
3003 * is_ci true if requested file system will be purely case-insensitive
3004 *
3005 * Determine the settings for utf8only, normalization and
3006 * casesensitivity. Specific values may have been requested by the
3007 * creator and/or we can inherit values from the parent dataset. If
3008 * the file system is of too early a vintage, a creator can not
3009 * request settings for these properties, even if the requested
3010 * setting is the default value. We don't actually want to create dsl
3011 * properties for these, so remove them from the source nvlist after
3012 * processing.
3013 */
3014 static int
3015 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
3016 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
3017 nvlist_t *zplprops, boolean_t *is_ci)
3018 {
3019 uint64_t sense = ZFS_PROP_UNDEFINED;
3020 uint64_t norm = ZFS_PROP_UNDEFINED;
3021 uint64_t u8 = ZFS_PROP_UNDEFINED;
3022
3023 ASSERT(zplprops != NULL);
3024
3025 /*
3026 * Pull out creator prop choices, if any.
3027 */
3028 if (createprops) {
3029 (void) nvlist_lookup_uint64(createprops,
3030 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
3031 (void) nvlist_lookup_uint64(createprops,
3032 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
3033 (void) nvlist_remove_all(createprops,
3034 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
3035 (void) nvlist_lookup_uint64(createprops,
3036 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
3037 (void) nvlist_remove_all(createprops,
3038 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
3039 (void) nvlist_lookup_uint64(createprops,
3040 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3041 (void) nvlist_remove_all(createprops,
3042 zfs_prop_to_name(ZFS_PROP_CASE));
3043 }
3044
3045 /*
3046 * If the zpl version requested is whacky or the file system
3047 * or pool is version is too "young" to support normalization
3048 * and the creator tried to set a value for one of the props,
3049 * error out.
3050 */
3051 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3052 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3053 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3054 (zplver < ZPL_VERSION_NORMALIZATION &&
3055 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3056 sense != ZFS_PROP_UNDEFINED)))
3057 return (SET_ERROR(ENOTSUP));
3058
3059 /*
3060 * Put the version in the zplprops
3061 */
3062 VERIFY(nvlist_add_uint64(zplprops,
3063 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3064
3065 if (norm == ZFS_PROP_UNDEFINED)
3066 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3067 VERIFY(nvlist_add_uint64(zplprops,
3068 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3069
3070 /*
3071 * If we're normalizing, names must always be valid UTF-8 strings.
3072 */
3073 if (norm)
3074 u8 = 1;
3075 if (u8 == ZFS_PROP_UNDEFINED)
3076 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3077 VERIFY(nvlist_add_uint64(zplprops,
3078 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3079
3080 if (sense == ZFS_PROP_UNDEFINED)
3081 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3082 VERIFY(nvlist_add_uint64(zplprops,
3083 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3084
3085 if (is_ci)
3086 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3087
3088 return (0);
3089 }
3090
3091 static int
3092 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3093 nvlist_t *zplprops, boolean_t *is_ci)
3094 {
3095 boolean_t fuids_ok, sa_ok;
3096 uint64_t zplver = ZPL_VERSION;
3097 objset_t *os = NULL;
3098 char parentname[MAXNAMELEN];
3099 char *cp;
3100 spa_t *spa;
3101 uint64_t spa_vers;
3102 int error;
3103
3104 (void) strlcpy(parentname, dataset, sizeof (parentname));
3105 cp = strrchr(parentname, '/');
3106 ASSERT(cp != NULL);
3107 cp[0] = '\0';
3108
3109 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3110 return (error);
3111
3112 spa_vers = spa_version(spa);
3113 spa_close(spa, FTAG);
3114
3115 zplver = zfs_zpl_version_map(spa_vers);
3116 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3117 sa_ok = (zplver >= ZPL_VERSION_SA);
3118
3119 /*
3120 * Open parent object set so we can inherit zplprop values.
3121 */
3122 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3123 return (error);
3124
3125 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3126 zplprops, is_ci);
3127 dmu_objset_rele(os, FTAG);
3128 return (error);
3129 }
3130
3131 static int
3132 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3133 nvlist_t *zplprops, boolean_t *is_ci)
3134 {
3135 boolean_t fuids_ok;
3136 boolean_t sa_ok;
3137 uint64_t zplver = ZPL_VERSION;
3138 int error;
3139
3140 zplver = zfs_zpl_version_map(spa_vers);
3141 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3142 sa_ok = (zplver >= ZPL_VERSION_SA);
3143
3144 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3145 createprops, zplprops, is_ci);
3146 return (error);
3147 }
3148
3149 /*
3150 * innvl: {
3151 * "type" -> dmu_objset_type_t (int32)
3152 * (optional) "props" -> { prop -> value }
3153 * }
3154 *
3155 * outnvl: propname -> error code (int32)
3156 */
3157 static int
3158 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3159 {
3160 int error = 0;
3161 zfs_creat_t zct = { 0 };
3162 nvlist_t *nvprops = NULL;
3163 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3164 int32_t type32;
3165 dmu_objset_type_t type;
3166 boolean_t is_insensitive = B_FALSE;
3167
3168 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3169 return (SET_ERROR(EINVAL));
3170 type = type32;
3171 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3172
3173 switch (type) {
3174 case DMU_OST_ZFS:
3175 cbfunc = zfs_create_cb;
3176 break;
3177
3178 case DMU_OST_ZVOL:
3179 cbfunc = zvol_create_cb;
3180 break;
3181
3182 default:
3183 cbfunc = NULL;
3184 break;
3185 }
3186 if (strchr(fsname, '@') ||
3187 strchr(fsname, '%'))
3188 return (SET_ERROR(EINVAL));
3189
3190 zct.zct_props = nvprops;
3191
3192 if (cbfunc == NULL)
3193 return (SET_ERROR(EINVAL));
3194
3195 if (type == DMU_OST_ZVOL) {
3196 uint64_t volsize, volblocksize;
3197
3198 if (nvprops == NULL)
3199 return (SET_ERROR(EINVAL));
3200 if (nvlist_lookup_uint64(nvprops,
3201 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3202 return (SET_ERROR(EINVAL));
3203
3204 if ((error = nvlist_lookup_uint64(nvprops,
3205 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3206 &volblocksize)) != 0 && error != ENOENT)
3207 return (SET_ERROR(EINVAL));
3208
3209 if (error != 0)
3210 volblocksize = zfs_prop_default_numeric(
3211 ZFS_PROP_VOLBLOCKSIZE);
3212
3213 if ((error = zvol_check_volblocksize(
3214 volblocksize)) != 0 ||
3215 (error = zvol_check_volsize(volsize,
3216 volblocksize)) != 0)
3217 return (error);
3218 } else if (type == DMU_OST_ZFS) {
3219 int error;
3220
3221 /*
3222 * We have to have normalization and
3223 * case-folding flags correct when we do the
3224 * file system creation, so go figure them out
3225 * now.
3226 */
3227 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3228 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3229 error = zfs_fill_zplprops(fsname, nvprops,
3230 zct.zct_zplprops, &is_insensitive);
3231 if (error != 0) {
3232 nvlist_free(zct.zct_zplprops);
3233 return (error);
3234 }
3235 }
3236
3237 error = dmu_objset_create(fsname, type,
3238 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3239 nvlist_free(zct.zct_zplprops);
3240
3241 /*
3242 * It would be nice to do this atomically.
3243 */
3244 if (error == 0) {
3245 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3246 nvprops, outnvl);
3247 if (error != 0)
3248 (void) dsl_destroy_head(fsname);
3249 }
3250 return (error);
3251 }
3252
3253 /*
3254 * innvl: {
3255 * "origin" -> name of origin snapshot
3256 * (optional) "props" -> { prop -> value }
3257 * }
3258 *
3259 * outnvl: propname -> error code (int32)
3260 */
3261 static int
3262 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3263 {
3264 int error = 0;
3265 nvlist_t *nvprops = NULL;
3266 char *origin_name;
3267
3268 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3269 return (SET_ERROR(EINVAL));
3270 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3271
3272 if (strchr(fsname, '@') ||
3273 strchr(fsname, '%'))
3274 return (SET_ERROR(EINVAL));
3275
3276 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3277 return (SET_ERROR(EINVAL));
3278 error = dmu_objset_clone(fsname, origin_name);
3279 if (error != 0)
3280 return (error);
3281
3282 /*
3283 * It would be nice to do this atomically.
3284 */
3285 if (error == 0) {
3286 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3287 nvprops, outnvl);
3288 if (error != 0)
3289 (void) dsl_destroy_head(fsname);
3290 }
3291 return (error);
3292 }
3293
3294 /*
3295 * innvl: {
3296 * "snaps" -> { snapshot1, snapshot2 }
3297 * (optional) "props" -> { prop -> value (string) }
3298 * }
3299 *
3300 * outnvl: snapshot -> error code (int32)
3301 */
3302 static int
3303 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3304 {
3305 nvlist_t *snaps;
3306 nvlist_t *props = NULL;
3307 int error, poollen;
3308 nvpair_t *pair;
3309
3310 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3311 if ((error = zfs_check_userprops(poolname, props)) != 0)
3312 return (error);
3313
3314 if (!nvlist_empty(props) &&
3315 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3316 return (SET_ERROR(ENOTSUP));
3317
3318 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3319 return (SET_ERROR(EINVAL));
3320 poollen = strlen(poolname);
3321 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3322 pair = nvlist_next_nvpair(snaps, pair)) {
3323 const char *name = nvpair_name(pair);
3324 const char *cp = strchr(name, '@');
3325
3326 /*
3327 * The snap name must contain an @, and the part after it must
3328 * contain only valid characters.
3329 */
3330 if (cp == NULL ||
3331 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3332 return (SET_ERROR(EINVAL));
3333
3334 /*
3335 * The snap must be in the specified pool.
3336 */
3337 if (strncmp(name, poolname, poollen) != 0 ||
3338 (name[poollen] != '/' && name[poollen] != '@'))
3339 return (SET_ERROR(EXDEV));
3340
3341 /* This must be the only snap of this fs. */
3342 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3343 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3344 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3345 == 0) {
3346 return (SET_ERROR(EXDEV));
3347 }
3348 }
3349 }
3350
3351 error = dsl_dataset_snapshot(snaps, props, outnvl);
3352 return (error);
3353 }
3354
3355 /*
3356 * innvl: "message" -> string
3357 */
3358 /* ARGSUSED */
3359 static int
3360 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3361 {
3362 char *message;
3363 spa_t *spa;
3364 int error;
3365 char *poolname;
3366
3367 /*
3368 * The poolname in the ioctl is not set, we get it from the TSD,
3369 * which was set at the end of the last successful ioctl that allows
3370 * logging. The secpolicy func already checked that it is set.
3371 * Only one log ioctl is allowed after each successful ioctl, so
3372 * we clear the TSD here.
3373 */
3374 poolname = tsd_get(zfs_allow_log_key);
3375 (void) tsd_set(zfs_allow_log_key, NULL);
3376 error = spa_open(poolname, &spa, FTAG);
3377 strfree(poolname);
3378 if (error != 0)
3379 return (error);
3380
3381 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3382 spa_close(spa, FTAG);
3383 return (SET_ERROR(EINVAL));
3384 }
3385
3386 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3387 spa_close(spa, FTAG);
3388 return (SET_ERROR(ENOTSUP));
3389 }
3390
3391 error = spa_history_log(spa, message);
3392 spa_close(spa, FTAG);
3393 return (error);
3394 }
3395
3396 /*
3397 * The dp_config_rwlock must not be held when calling this, because the
3398 * unmount may need to write out data.
3399 *
3400 * This function is best-effort. Callers must deal gracefully if it
3401 * remains mounted (or is remounted after this call).
3402 *
3403 * Returns 0 if the argument is not a snapshot, or it is not currently a
3404 * filesystem, or we were able to unmount it. Returns error code otherwise.
3405 */
3406 int
3407 zfs_unmount_snap(const char *snapname)
3408 {
3409 vfs_t *vfsp;
3410 zfsvfs_t *zfsvfs;
3411 int err;
3412
3413 if (strchr(snapname, '@') == NULL)
3414 return (0);
3415
3416 vfsp = zfs_get_vfs(snapname);
3417 if (vfsp == NULL)
3418 return (0);
3419
3420 zfsvfs = vfsp->vfs_data;
3421 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3422
3423 err = vn_vfswlock(vfsp->vfs_vnodecovered);
3424 VFS_RELE(vfsp);
3425 if (err != 0)
3426 return (SET_ERROR(err));
3427
3428 /*
3429 * Always force the unmount for snapshots.
3430 */
3431 (void) dounmount(vfsp, MS_FORCE, kcred);
3432 return (0);
3433 }
3434
3435 /* ARGSUSED */
3436 static int
3437 zfs_unmount_snap_cb(const char *snapname, void *arg)
3438 {
3439 return (zfs_unmount_snap(snapname));
3440 }
3441
3442 /*
3443 * When a clone is destroyed, its origin may also need to be destroyed,
3444 * in which case it must be unmounted. This routine will do that unmount
3445 * if necessary.
3446 */
3447 void
3448 zfs_destroy_unmount_origin(const char *fsname)
3449 {
3450 int error;
3451 objset_t *os;
3452 dsl_dataset_t *ds;
3453
3454 error = dmu_objset_hold(fsname, FTAG, &os);
3455 if (error != 0)
3456 return;
3457 ds = dmu_objset_ds(os);
3458 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3459 char originname[MAXNAMELEN];
3460 dsl_dataset_name(ds->ds_prev, originname);
3461 dmu_objset_rele(os, FTAG);
3462 (void) zfs_unmount_snap(originname);
3463 } else {
3464 dmu_objset_rele(os, FTAG);
3465 }
3466 }
3467
3468 /*
3469 * innvl: {
3470 * "snaps" -> { snapshot1, snapshot2 }
3471 * (optional boolean) "defer"
3472 * }
3473 *
3474 * outnvl: snapshot -> error code (int32)
3475 *
3476 */
3477 /* ARGSUSED */
3478 static int
3479 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3480 {
3481 nvlist_t *snaps;
3482 nvpair_t *pair;
3483 boolean_t defer;
3484
3485 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3486 return (SET_ERROR(EINVAL));
3487 defer = nvlist_exists(innvl, "defer");
3488
3489 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3490 pair = nvlist_next_nvpair(snaps, pair)) {
3491 (void) zfs_unmount_snap(nvpair_name(pair));
3492 }
3493
3494 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3495 }
3496
3497 /*
3498 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>.
3499 * All bookmarks must be in the same pool.
3500 *
3501 * innvl: {
3502 * bookmark1 -> snapshot1, bookmark2 -> snapshot2
3503 * }
3504 *
3505 * outnvl: bookmark -> error code (int32)
3506 *
3507 */
3508 /* ARGSUSED */
3509 static int
3510 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3511 {
3512 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3513 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3514 char *snap_name;
3515
3516 /*
3517 * Verify the snapshot argument.
3518 */
3519 if (nvpair_value_string(pair, &snap_name) != 0)
3520 return (SET_ERROR(EINVAL));
3521
3522
3523 /* Verify that the keys (bookmarks) are unique */
3524 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair);
3525 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) {
3526 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0)
3527 return (SET_ERROR(EINVAL));
3528 }
3529 }
3530
3531 return (dsl_bookmark_create(innvl, outnvl));
3532 }
3533
3534 /*
3535 * innvl: {
3536 * property 1, property 2, ...
3537 * }
3538 *
3539 * outnvl: {
3540 * bookmark name 1 -> { property 1, property 2, ... },
3541 * bookmark name 2 -> { property 1, property 2, ... }
3542 * }
3543 *
3544 */
3545 static int
3546 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3547 {
3548 return (dsl_get_bookmarks(fsname, innvl, outnvl));
3549 }
3550
3551 /*
3552 * innvl: {
3553 * bookmark name 1, bookmark name 2
3554 * }
3555 *
3556 * outnvl: bookmark -> error code (int32)
3557 *
3558 */
3559 static int
3560 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl,
3561 nvlist_t *outnvl)
3562 {
3563 int error, poollen;
3564
3565 poollen = strlen(poolname);
3566 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3567 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3568 const char *name = nvpair_name(pair);
3569 const char *cp = strchr(name, '#');
3570
3571 /*
3572 * The bookmark name must contain an #, and the part after it
3573 * must contain only valid characters.
3574 */
3575 if (cp == NULL ||
3576 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3577 return (SET_ERROR(EINVAL));
3578
3579 /*
3580 * The bookmark must be in the specified pool.
3581 */
3582 if (strncmp(name, poolname, poollen) != 0 ||
3583 (name[poollen] != '/' && name[poollen] != '#'))
3584 return (SET_ERROR(EXDEV));
3585 }
3586
3587 error = dsl_bookmark_destroy(innvl, outnvl);
3588 return (error);
3589 }
3590
3591 /*
3592 * inputs:
3593 * zc_name name of dataset to destroy
3594 * zc_objset_type type of objset
3595 * zc_defer_destroy mark for deferred destroy
3596 *
3597 * outputs: none
3598 */
3599 static int
3600 zfs_ioc_destroy(zfs_cmd_t *zc)
3601 {
3602 int err;
3603
3604 if (zc->zc_objset_type == DMU_OST_ZFS) {
3605 err = zfs_unmount_snap(zc->zc_name);
3606 if (err != 0)
3607 return (err);
3608 }
3609
3610 if (strchr(zc->zc_name, '@'))
3611 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3612 else
3613 err = dsl_destroy_head(zc->zc_name);
3614 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3615 (void) zvol_remove_minor(zc->zc_name);
3616 return (err);
3617 }
3618
3619 /*
3620 * fsname is name of dataset to rollback (to most recent snapshot)
3621 *
3622 * innvl is not used.
3623 *
3624 * outnvl: "target" -> name of most recent snapshot
3625 * }
3626 */
3627 /* ARGSUSED */
3628 static int
3629 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl)
3630 {
3631 zfsvfs_t *zfsvfs;
3632 int error;
3633
3634 if (getzfsvfs(fsname, &zfsvfs) == 0) {
3635 error = zfs_suspend_fs(zfsvfs);
3636 if (error == 0) {
3637 int resume_err;
3638
3639 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl);
3640 resume_err = zfs_resume_fs(zfsvfs, fsname);
3641 error = error ? error : resume_err;
3642 }
3643 VFS_RELE(zfsvfs->z_vfs);
3644 } else {
3645 error = dsl_dataset_rollback(fsname, NULL, outnvl);
3646 }
3647 return (error);
3648 }
3649
3650 static int
3651 recursive_unmount(const char *fsname, void *arg)
3652 {
3653 const char *snapname = arg;
3654 char fullname[MAXNAMELEN];
3655
3656 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3657 return (zfs_unmount_snap(fullname));
3658 }
3659
3660 /*
3661 * inputs:
3662 * zc_name old name of dataset
3663 * zc_value new name of dataset
3664 * zc_cookie recursive flag (only valid for snapshots)
3665 *
3666 * outputs: none
3667 */
3668 static int
3669 zfs_ioc_rename(zfs_cmd_t *zc)
3670 {
3671 boolean_t recursive = zc->zc_cookie & 1;
3672 char *at;
3673
3674 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3675 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3676 strchr(zc->zc_value, '%'))
3677 return (SET_ERROR(EINVAL));
3678
3679 at = strchr(zc->zc_name, '@');
3680 if (at != NULL) {
3681 /* snaps must be in same fs */
3682 int error;
3683
3684 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3685 return (SET_ERROR(EXDEV));
3686 *at = '\0';
3687 if (zc->zc_objset_type == DMU_OST_ZFS) {
3688 error = dmu_objset_find(zc->zc_name,
3689 recursive_unmount, at + 1,
3690 recursive ? DS_FIND_CHILDREN : 0);
3691 if (error != 0) {
3692 *at = '@';
3693 return (error);
3694 }
3695 }
3696 error = dsl_dataset_rename_snapshot(zc->zc_name,
3697 at + 1, strchr(zc->zc_value, '@') + 1, recursive);
3698 *at = '@';
3699
3700 return (error);
3701 } else {
3702 if (zc->zc_objset_type == DMU_OST_ZVOL)
3703 (void) zvol_remove_minor(zc->zc_name);
3704 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3705 }
3706 }
3707
3708 static int
3709 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3710 {
3711 const char *propname = nvpair_name(pair);
3712 boolean_t issnap = (strchr(dsname, '@') != NULL);
3713 zfs_prop_t prop = zfs_name_to_prop(propname);
3714 uint64_t intval;
3715 int err;
3716
3717 if (prop == ZPROP_INVAL) {
3718 if (zfs_prop_user(propname)) {
3719 if (err = zfs_secpolicy_write_perms(dsname,
3720 ZFS_DELEG_PERM_USERPROP, cr))
3721 return (err);
3722 return (0);
3723 }
3724
3725 if (!issnap && zfs_prop_userquota(propname)) {
3726 const char *perm = NULL;
3727 const char *uq_prefix =
3728 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3729 const char *gq_prefix =
3730 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3731
3732 if (strncmp(propname, uq_prefix,
3733 strlen(uq_prefix)) == 0) {
3734 perm = ZFS_DELEG_PERM_USERQUOTA;
3735 } else if (strncmp(propname, gq_prefix,
3736 strlen(gq_prefix)) == 0) {
3737 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3738 } else {
3739 /* USERUSED and GROUPUSED are read-only */
3740 return (SET_ERROR(EINVAL));
3741 }
3742
3743 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3744 return (err);
3745 return (0);
3746 }
3747
3748 return (SET_ERROR(EINVAL));
3749 }
3750
3751 if (issnap)
3752 return (SET_ERROR(EINVAL));
3753
3754 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3755 /*
3756 * dsl_prop_get_all_impl() returns properties in this
3757 * format.
3758 */
3759 nvlist_t *attrs;
3760 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3761 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3762 &pair) == 0);
3763 }
3764
3765 /*
3766 * Check that this value is valid for this pool version
3767 */
3768 switch (prop) {
3769 case ZFS_PROP_COMPRESSION:
3770 /*
3771 * If the user specified gzip compression, make sure
3772 * the SPA supports it. We ignore any errors here since
3773 * we'll catch them later.
3774 */
3775 if (nvpair_value_uint64(pair, &intval) == 0) {
3776 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3777 intval <= ZIO_COMPRESS_GZIP_9 &&
3778 zfs_earlier_version(dsname,
3779 SPA_VERSION_GZIP_COMPRESSION)) {
3780 return (SET_ERROR(ENOTSUP));
3781 }
3782
3783 if (intval == ZIO_COMPRESS_ZLE &&
3784 zfs_earlier_version(dsname,
3785 SPA_VERSION_ZLE_COMPRESSION))
3786 return (SET_ERROR(ENOTSUP));
3787
3788 if (intval == ZIO_COMPRESS_LZ4) {
3789 spa_t *spa;
3790
3791 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3792 return (err);
3793
3794 if (!spa_feature_is_enabled(spa,
3795 SPA_FEATURE_LZ4_COMPRESS)) {
3796 spa_close(spa, FTAG);
3797 return (SET_ERROR(ENOTSUP));
3798 }
3799 spa_close(spa, FTAG);
3800 }
3801
3802 /*
3803 * If this is a bootable dataset then
3804 * verify that the compression algorithm
3805 * is supported for booting. We must return
3806 * something other than ENOTSUP since it
3807 * implies a downrev pool version.
3808 */
3809 if (zfs_is_bootfs(dsname) &&
3810 !BOOTFS_COMPRESS_VALID(intval)) {
3811 return (SET_ERROR(ERANGE));
3812 }
3813 }
3814 break;
3815
3816 case ZFS_PROP_COPIES:
3817 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3818 return (SET_ERROR(ENOTSUP));
3819 break;
3820
3821 case ZFS_PROP_RECORDSIZE:
3822 /* Record sizes above 128k need the feature to be enabled */
3823 if (nvpair_value_uint64(pair, &intval) == 0 &&
3824 intval > SPA_OLD_MAXBLOCKSIZE) {
3825 spa_t *spa;
3826
3827 /*
3828 * If this is a bootable dataset then
3829 * the we don't allow large (>128K) blocks,
3830 * because GRUB doesn't support them.
3831 */
3832 if (zfs_is_bootfs(dsname) &&
3833 intval > SPA_OLD_MAXBLOCKSIZE) {
3834 return (SET_ERROR(ERANGE));
3835 }
3836
3837 /*
3838 * We don't allow setting the property above 1MB,
3839 * unless the tunable has been changed.
3840 */
3841 if (intval > zfs_max_recordsize ||
3842 intval > SPA_MAXBLOCKSIZE)
3843 return (SET_ERROR(ERANGE));
3844
3845 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3846 return (err);
3847
3848 if (!spa_feature_is_enabled(spa,
3849 SPA_FEATURE_LARGE_BLOCKS)) {
3850 spa_close(spa, FTAG);
3851 return (SET_ERROR(ENOTSUP));
3852 }
3853 spa_close(spa, FTAG);
3854 }
3855 break;
3856
3857 case ZFS_PROP_SHARESMB:
3858 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3859 return (SET_ERROR(ENOTSUP));
3860 break;
3861
3862 case ZFS_PROP_ACLINHERIT:
3863 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3864 nvpair_value_uint64(pair, &intval) == 0) {
3865 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3866 zfs_earlier_version(dsname,
3867 SPA_VERSION_PASSTHROUGH_X))
3868 return (SET_ERROR(ENOTSUP));
3869 }
3870 break;
3871
3872 case ZFS_PROP_CHECKSUM:
3873 case ZFS_PROP_DEDUP:
3874 {
3875 spa_feature_t feature;
3876 spa_t *spa;
3877
3878 /* dedup feature version checks */
3879 if (prop == ZFS_PROP_DEDUP &&
3880 zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3881 return (SET_ERROR(ENOTSUP));
3882
3883 if (nvpair_value_uint64(pair, &intval) != 0)
3884 return (SET_ERROR(EINVAL));
3885
3886 /* check prop value is enabled in features */
3887 feature = zio_checksum_to_feature(intval);
3888 if (feature == SPA_FEATURE_NONE)
3889 break;
3890
3891 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3892 return (err);
3893 /*
3894 * Salted checksums are not supported on root pools.
3895 */
3896 if (spa_bootfs(spa) != 0 &&
3897 intval < ZIO_CHECKSUM_FUNCTIONS &&
3898 (zio_checksum_table[intval].ci_flags &
3899 ZCHECKSUM_FLAG_SALTED)) {
3900 spa_close(spa, FTAG);
3901 return (SET_ERROR(ERANGE));
3902 }
3903 if (!spa_feature_is_enabled(spa, feature)) {
3904 spa_close(spa, FTAG);
3905 return (SET_ERROR(ENOTSUP));
3906 }
3907 spa_close(spa, FTAG);
3908 break;
3909 }
3910 }
3911
3912 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3913 }
3914
3915 /*
3916 * Checks for a race condition to make sure we don't increment a feature flag
3917 * multiple times.
3918 */
3919 static int
3920 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
3921 {
3922 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3923 spa_feature_t *featurep = arg;
3924
3925 if (!spa_feature_is_active(spa, *featurep))
3926 return (0);
3927 else
3928 return (SET_ERROR(EBUSY));
3929 }
3930
3931 /*
3932 * The callback invoked on feature activation in the sync task caused by
3933 * zfs_prop_activate_feature.
3934 */
3935 static void
3936 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
3937 {
3938 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3939 spa_feature_t *featurep = arg;
3940
3941 spa_feature_incr(spa, *featurep, tx);
3942 }
3943
3944 /*
3945 * Activates a feature on a pool in response to a property setting. This
3946 * creates a new sync task which modifies the pool to reflect the feature
3947 * as being active.
3948 */
3949 static int
3950 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature)
3951 {
3952 int err;
3953
3954 /* EBUSY here indicates that the feature is already active */
3955 err = dsl_sync_task(spa_name(spa),
3956 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
3957 &feature, 2, ZFS_SPACE_CHECK_RESERVED);
3958
3959 if (err != 0 && err != EBUSY)
3960 return (err);
3961 else
3962 return (0);
3963 }
3964
3965 /*
3966 * Removes properties from the given props list that fail permission checks
3967 * needed to clear them and to restore them in case of a receive error. For each
3968 * property, make sure we have both set and inherit permissions.
3969 *
3970 * Returns the first error encountered if any permission checks fail. If the
3971 * caller provides a non-NULL errlist, it also gives the complete list of names
3972 * of all the properties that failed a permission check along with the
3973 * corresponding error numbers. The caller is responsible for freeing the
3974 * returned errlist.
3975 *
3976 * If every property checks out successfully, zero is returned and the list
3977 * pointed at by errlist is NULL.
3978 */
3979 static int
3980 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3981 {
3982 zfs_cmd_t *zc;
3983 nvpair_t *pair, *next_pair;
3984 nvlist_t *errors;
3985 int err, rv = 0;
3986
3987 if (props == NULL)
3988 return (0);
3989
3990 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3991
3992 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3993 (void) strcpy(zc->zc_name, dataset);
3994 pair = nvlist_next_nvpair(props, NULL);
3995 while (pair != NULL) {
3996 next_pair = nvlist_next_nvpair(props, pair);
3997
3998 (void) strcpy(zc->zc_value, nvpair_name(pair));
3999 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
4000 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
4001 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
4002 VERIFY(nvlist_add_int32(errors,
4003 zc->zc_value, err) == 0);
4004 }
4005 pair = next_pair;
4006 }
4007 kmem_free(zc, sizeof (zfs_cmd_t));
4008
4009 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
4010 nvlist_free(errors);
4011 errors = NULL;
4012 } else {
4013 VERIFY(nvpair_value_int32(pair, &rv) == 0);
4014 }
4015
4016 if (errlist == NULL)
4017 nvlist_free(errors);
4018 else
4019 *errlist = errors;
4020
4021 return (rv);
4022 }
4023
4024 static boolean_t
4025 propval_equals(nvpair_t *p1, nvpair_t *p2)
4026 {
4027 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
4028 /* dsl_prop_get_all_impl() format */
4029 nvlist_t *attrs;
4030 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
4031 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
4032 &p1) == 0);
4033 }
4034
4035 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
4036 nvlist_t *attrs;
4037 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
4038 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
4039 &p2) == 0);
4040 }
4041
4042 if (nvpair_type(p1) != nvpair_type(p2))
4043 return (B_FALSE);
4044
4045 if (nvpair_type(p1) == DATA_TYPE_STRING) {
4046 char *valstr1, *valstr2;
4047
4048 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
4049 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
4050 return (strcmp(valstr1, valstr2) == 0);
4051 } else {
4052 uint64_t intval1, intval2;
4053
4054 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
4055 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
4056 return (intval1 == intval2);
4057 }
4058 }
4059
4060 /*
4061 * Remove properties from props if they are not going to change (as determined
4062 * by comparison with origprops). Remove them from origprops as well, since we
4063 * do not need to clear or restore properties that won't change.
4064 */
4065 static void
4066 props_reduce(nvlist_t *props, nvlist_t *origprops)
4067 {
4068 nvpair_t *pair, *next_pair;
4069
4070 if (origprops == NULL)
4071 return; /* all props need to be received */
4072
4073 pair = nvlist_next_nvpair(props, NULL);
4074 while (pair != NULL) {
4075 const char *propname = nvpair_name(pair);
4076 nvpair_t *match;
4077
4078 next_pair = nvlist_next_nvpair(props, pair);
4079
4080 if ((nvlist_lookup_nvpair(origprops, propname,
4081 &match) != 0) || !propval_equals(pair, match))
4082 goto next; /* need to set received value */
4083
4084 /* don't clear the existing received value */
4085 (void) nvlist_remove_nvpair(origprops, match);
4086 /* don't bother receiving the property */
4087 (void) nvlist_remove_nvpair(props, pair);
4088 next:
4089 pair = next_pair;
4090 }
4091 }
4092
4093 /*
4094 * Extract properties that cannot be set PRIOR to the receipt of a dataset.
4095 * For example, refquota cannot be set until after the receipt of a dataset,
4096 * because in replication streams, an older/earlier snapshot may exceed the
4097 * refquota. We want to receive the older/earlier snapshot, but setting
4098 * refquota pre-receipt will set the dsl's ACTUAL quota, which will prevent
4099 * the older/earlier snapshot from being received (with EDQUOT).
4100 *
4101 * The ZFS test "zfs_receive_011_pos" demonstrates such a scenario.
4102 *
4103 * libzfs will need to be judicious handling errors encountered by props
4104 * extracted by this function.
4105 */
4106 static nvlist_t *
4107 extract_delay_props(nvlist_t *props)
4108 {
4109 nvlist_t *delayprops;
4110 nvpair_t *nvp, *tmp;
4111 static const zfs_prop_t delayable[] = { ZFS_PROP_REFQUOTA, 0 };
4112 int i;
4113
4114 VERIFY(nvlist_alloc(&delayprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4115
4116 for (nvp = nvlist_next_nvpair(props, NULL); nvp != NULL;
4117 nvp = nvlist_next_nvpair(props, nvp)) {
4118 /*
4119 * strcmp() is safe because zfs_prop_to_name() always returns
4120 * a bounded string.
4121 */
4122 for (i = 0; delayable[i] != 0; i++) {
4123 if (strcmp(zfs_prop_to_name(delayable[i]),
4124 nvpair_name(nvp)) == 0) {
4125 break;
4126 }
4127 }
4128 if (delayable[i] != 0) {
4129 tmp = nvlist_prev_nvpair(props, nvp);
4130 VERIFY(nvlist_add_nvpair(delayprops, nvp) == 0);
4131 VERIFY(nvlist_remove_nvpair(props, nvp) == 0);
4132 nvp = tmp;
4133 }
4134 }
4135
4136 if (nvlist_empty(delayprops)) {
4137 nvlist_free(delayprops);
4138 delayprops = NULL;
4139 }
4140 return (delayprops);
4141 }
4142
4143 #ifdef DEBUG
4144 static boolean_t zfs_ioc_recv_inject_err;
4145 #endif
4146
4147 /*
4148 * inputs:
4149 * zc_name name of containing filesystem
4150 * zc_nvlist_src{_size} nvlist of properties to apply
4151 * zc_value name of snapshot to create
4152 * zc_string name of clone origin (if DRR_FLAG_CLONE)
4153 * zc_cookie file descriptor to recv from
4154 * zc_begin_record the BEGIN record of the stream (not byteswapped)
4155 * zc_guid force flag
4156 * zc_cleanup_fd cleanup-on-exit file descriptor
4157 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
4158 * zc_resumable if data is incomplete assume sender will resume
4159 *
4160 * outputs:
4161 * zc_cookie number of bytes read
4162 * zc_nvlist_dst{_size} error for each unapplied received property
4163 * zc_obj zprop_errflags_t
4164 * zc_action_handle handle for this guid/ds mapping
4165 */
4166 static int
4167 zfs_ioc_recv(zfs_cmd_t *zc)
4168 {
4169 file_t *fp;
4170 dmu_recv_cookie_t drc;
4171 boolean_t force = (boolean_t)zc->zc_guid;
4172 int fd;
4173 int error = 0;
4174 int props_error = 0;
4175 nvlist_t *errors;
4176 offset_t off;
4177 nvlist_t *props = NULL; /* sent properties */
4178 nvlist_t *origprops = NULL; /* existing properties */
4179 nvlist_t *delayprops = NULL; /* sent properties applied post-receive */
4180 char *origin = NULL;
4181 char *tosnap;
4182 char tofs[ZFS_MAXNAMELEN];
4183 boolean_t first_recvd_props = B_FALSE;
4184
4185 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
4186 strchr(zc->zc_value, '@') == NULL ||
4187 strchr(zc->zc_value, '%'))
4188 return (SET_ERROR(EINVAL));
4189
4190 (void) strcpy(tofs, zc->zc_value);
4191 tosnap = strchr(tofs, '@');
4192 *tosnap++ = '\0';
4193
4194 if (zc->zc_nvlist_src != NULL &&
4195 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
4196 zc->zc_iflags, &props)) != 0)
4197 return (error);
4198
4199 fd = zc->zc_cookie;
4200 fp = getf(fd);
4201 if (fp == NULL) {
4202 nvlist_free(props);
4203 return (SET_ERROR(EBADF));
4204 }
4205
4206 errors = fnvlist_alloc();
4207
4208 if (zc->zc_string[0])
4209 origin = zc->zc_string;
4210
4211 error = dmu_recv_begin(tofs, tosnap,
4212 &zc->zc_begin_record, force, zc->zc_resumable, origin, &drc);
4213 if (error != 0)
4214 goto out;
4215
4216 /*
4217 * Set properties before we receive the stream so that they are applied
4218 * to the new data. Note that we must call dmu_recv_stream() if
4219 * dmu_recv_begin() succeeds.
4220 */
4221 if (props != NULL && !drc.drc_newfs) {
4222 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
4223 SPA_VERSION_RECVD_PROPS &&
4224 !dsl_prop_get_hasrecvd(tofs))
4225 first_recvd_props = B_TRUE;
4226
4227 /*
4228 * If new received properties are supplied, they are to
4229 * completely replace the existing received properties, so stash
4230 * away the existing ones.
4231 */
4232 if (dsl_prop_get_received(tofs, &origprops) == 0) {
4233 nvlist_t *errlist = NULL;
4234 /*
4235 * Don't bother writing a property if its value won't
4236 * change (and avoid the unnecessary security checks).
4237 *
4238 * The first receive after SPA_VERSION_RECVD_PROPS is a
4239 * special case where we blow away all local properties
4240 * regardless.
4241 */
4242 if (!first_recvd_props)
4243 props_reduce(props, origprops);
4244 if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
4245 (void) nvlist_merge(errors, errlist, 0);
4246 nvlist_free(errlist);
4247
4248 if (clear_received_props(tofs, origprops,
4249 first_recvd_props ? NULL : props) != 0)
4250 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4251 } else {
4252 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4253 }
4254 }
4255
4256 if (props != NULL) {
4257 props_error = dsl_prop_set_hasrecvd(tofs);
4258
4259 if (props_error == 0) {
4260 delayprops = extract_delay_props(props);
4261 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4262 props, errors);
4263 }
4264 }
4265
4266 off = fp->f_offset;
4267 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4268 &zc->zc_action_handle);
4269
4270 if (error == 0) {
4271 zfsvfs_t *zfsvfs = NULL;
4272
4273 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4274 /* online recv */
4275 int end_err;
4276
4277 error = zfs_suspend_fs(zfsvfs);
4278 /*
4279 * If the suspend fails, then the recv_end will
4280 * likely also fail, and clean up after itself.
4281 */
4282 end_err = dmu_recv_end(&drc, zfsvfs);
4283 if (error == 0)
4284 error = zfs_resume_fs(zfsvfs, tofs);
4285 error = error ? error : end_err;
4286 VFS_RELE(zfsvfs->z_vfs);
4287 } else {
4288 error = dmu_recv_end(&drc, NULL);
4289 }
4290
4291 /* Set delayed properties now, after we're done receiving. */
4292 if (delayprops != NULL) {
4293 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4294 delayprops, errors);
4295 }
4296 }
4297
4298 /*
4299 * Merge delayed props back in with initial props, so errors (which is
4300 * one list) can match up with the order in which props were set.
4301 * Also, the error cleanup code only deals with the unsplit props
4302 * list.
4303 */
4304 if (delayprops != NULL) {
4305 VERIFY(nvlist_merge(props, delayprops, 0) == 0);
4306 nvlist_free(delayprops);
4307 }
4308
4309 /*
4310 * Now that all props, initial and delayed, are set, report the prop
4311 * errors to the caller.
4312 */
4313 if (zc->zc_nvlist_dst_size != 0 &&
4314 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4315 put_nvlist(zc, errors) != 0)) {
4316 /*
4317 * Caller made zc->zc_nvlist_dst less than the minimum expected
4318 * size or supplied an invalid address.
4319 */
4320 props_error = SET_ERROR(EINVAL);
4321 }
4322
4323 zc->zc_cookie = off - fp->f_offset;
4324 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4325 fp->f_offset = off;
4326
4327 #ifdef DEBUG
4328 if (zfs_ioc_recv_inject_err) {
4329 zfs_ioc_recv_inject_err = B_FALSE;
4330 error = 1;
4331 }
4332 #endif
4333 /*
4334 * On error, restore the original props.
4335 */
4336 if (error != 0 && props != NULL && !drc.drc_newfs) {
4337 if (clear_received_props(tofs, props, NULL) != 0) {
4338 /*
4339 * We failed to clear the received properties.
4340 * Since we may have left a $recvd value on the
4341 * system, we can't clear the $hasrecvd flag.
4342 */
4343 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4344 } else if (first_recvd_props) {
4345 dsl_prop_unset_hasrecvd(tofs);
4346 }
4347
4348 if (origprops == NULL && !drc.drc_newfs) {
4349 /* We failed to stash the original properties. */
4350 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4351 }
4352
4353 /*
4354 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4355 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4356 * explictly if we're restoring local properties cleared in the
4357 * first new-style receive.
4358 */
4359 if (origprops != NULL &&
4360 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4361 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4362 origprops, NULL) != 0) {
4363 /*
4364 * We stashed the original properties but failed to
4365 * restore them.
4366 */
4367 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4368 }
4369 }
4370 out:
4371 nvlist_free(props);
4372 nvlist_free(origprops);
4373 nvlist_free(errors);
4374 releasef(fd);
4375
4376 if (error == 0)
4377 error = props_error;
4378
4379 return (error);
4380 }
4381
4382 /*
4383 * inputs:
4384 * zc_name name of snapshot to send
4385 * zc_cookie file descriptor to send stream to
4386 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4387 * zc_sendobj objsetid of snapshot to send
4388 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4389 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4390 * output size in zc_objset_type.
4391 * zc_flags lzc_send_flags
4392 *
4393 * outputs:
4394 * zc_objset_type estimated size, if zc_guid is set
4395 */
4396 static int
4397 zfs_ioc_send(zfs_cmd_t *zc)
4398 {
4399 int error;
4400 offset_t off;
4401 boolean_t estimate = (zc->zc_guid != 0);
4402 boolean_t embedok = (zc->zc_flags & 0x1);
4403 boolean_t large_block_ok = (zc->zc_flags & 0x2);
4404
4405 if (zc->zc_obj != 0) {
4406 dsl_pool_t *dp;
4407 dsl_dataset_t *tosnap;
4408
4409 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4410 if (error != 0)
4411 return (error);
4412
4413 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4414 if (error != 0) {
4415 dsl_pool_rele(dp, FTAG);
4416 return (error);
4417 }
4418
4419 if (dsl_dir_is_clone(tosnap->ds_dir))
4420 zc->zc_fromobj =
4421 dsl_dir_phys(tosnap->ds_dir)->dd_origin_obj;
4422 dsl_dataset_rele(tosnap, FTAG);
4423 dsl_pool_rele(dp, FTAG);
4424 }
4425
4426 if (estimate) {
4427 dsl_pool_t *dp;
4428 dsl_dataset_t *tosnap;
4429 dsl_dataset_t *fromsnap = NULL;
4430
4431 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4432 if (error != 0)
4433 return (error);
4434
4435 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4436 if (error != 0) {
4437 dsl_pool_rele(dp, FTAG);
4438 return (error);
4439 }
4440
4441 if (zc->zc_fromobj != 0) {
4442 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4443 FTAG, &fromsnap);
4444 if (error != 0) {
4445 dsl_dataset_rele(tosnap, FTAG);
4446 dsl_pool_rele(dp, FTAG);
4447 return (error);
4448 }
4449 }
4450
4451 error = dmu_send_estimate(tosnap, fromsnap,
4452 &zc->zc_objset_type);
4453
4454 if (fromsnap != NULL)
4455 dsl_dataset_rele(fromsnap, FTAG);
4456 dsl_dataset_rele(tosnap, FTAG);
4457 dsl_pool_rele(dp, FTAG);
4458 } else {
4459 file_t *fp = getf(zc->zc_cookie);
4460 if (fp == NULL)
4461 return (SET_ERROR(EBADF));
4462
4463 off = fp->f_offset;
4464 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4465 zc->zc_fromobj, embedok, large_block_ok,
4466 zc->zc_cookie, fp->f_vnode, &off);
4467
4468 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4469 fp->f_offset = off;
4470 releasef(zc->zc_cookie);
4471 }
4472 return (error);
4473 }
4474
4475 /*
4476 * inputs:
4477 * zc_name name of snapshot on which to report progress
4478 * zc_cookie file descriptor of send stream
4479 *
4480 * outputs:
4481 * zc_cookie number of bytes written in send stream thus far
4482 */
4483 static int
4484 zfs_ioc_send_progress(zfs_cmd_t *zc)
4485 {
4486 dsl_pool_t *dp;
4487 dsl_dataset_t *ds;
4488 dmu_sendarg_t *dsp = NULL;
4489 int error;
4490
4491 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4492 if (error != 0)
4493 return (error);
4494
4495 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4496 if (error != 0) {
4497 dsl_pool_rele(dp, FTAG);
4498 return (error);
4499 }
4500
4501 mutex_enter(&ds->ds_sendstream_lock);
4502
4503 /*
4504 * Iterate over all the send streams currently active on this dataset.
4505 * If there's one which matches the specified file descriptor _and_ the
4506 * stream was started by the current process, return the progress of
4507 * that stream.
4508 */
4509 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4510 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4511 if (dsp->dsa_outfd == zc->zc_cookie &&
4512 dsp->dsa_proc == curproc)
4513 break;
4514 }
4515
4516 if (dsp != NULL)
4517 zc->zc_cookie = *(dsp->dsa_off);
4518 else
4519 error = SET_ERROR(ENOENT);
4520
4521 mutex_exit(&ds->ds_sendstream_lock);
4522 dsl_dataset_rele(ds, FTAG);
4523 dsl_pool_rele(dp, FTAG);
4524 return (error);
4525 }
4526
4527 static int
4528 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4529 {
4530 int id, error;
4531
4532 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4533 &zc->zc_inject_record);
4534
4535 if (error == 0)
4536 zc->zc_guid = (uint64_t)id;
4537
4538 return (error);
4539 }
4540
4541 static int
4542 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4543 {
4544 return (zio_clear_fault((int)zc->zc_guid));
4545 }
4546
4547 static int
4548 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4549 {
4550 int id = (int)zc->zc_guid;
4551 int error;
4552
4553 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4554 &zc->zc_inject_record);
4555
4556 zc->zc_guid = id;
4557
4558 return (error);
4559 }
4560
4561 static int
4562 zfs_ioc_error_log(zfs_cmd_t *zc)
4563 {
4564 spa_t *spa;
4565 int error;
4566 size_t count = (size_t)zc->zc_nvlist_dst_size;
4567
4568 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4569 return (error);
4570
4571 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4572 &count);
4573 if (error == 0)
4574 zc->zc_nvlist_dst_size = count;
4575 else
4576 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4577
4578 spa_close(spa, FTAG);
4579
4580 return (error);
4581 }
4582
4583 static int
4584 zfs_ioc_clear(zfs_cmd_t *zc)
4585 {
4586 spa_t *spa;
4587 vdev_t *vd;
4588 int error;
4589
4590 /*
4591 * On zpool clear we also fix up missing slogs
4592 */
4593 mutex_enter(&spa_namespace_lock);
4594 spa = spa_lookup(zc->zc_name);
4595 if (spa == NULL) {
4596 mutex_exit(&spa_namespace_lock);
4597 return (SET_ERROR(EIO));
4598 }
4599 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4600 /* we need to let spa_open/spa_load clear the chains */
4601 spa_set_log_state(spa, SPA_LOG_CLEAR);
4602 }
4603 spa->spa_last_open_failed = 0;
4604 mutex_exit(&spa_namespace_lock);
4605
4606 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4607 error = spa_open(zc->zc_name, &spa, FTAG);
4608 } else {
4609 nvlist_t *policy;
4610 nvlist_t *config = NULL;
4611
4612 if (zc->zc_nvlist_src == NULL)
4613 return (SET_ERROR(EINVAL));
4614
4615 if ((error = get_nvlist(zc->zc_nvlist_src,
4616 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4617 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4618 policy, &config);
4619 if (config != NULL) {
4620 int err;
4621
4622 if ((err = put_nvlist(zc, config)) != 0)
4623 error = err;
4624 nvlist_free(config);
4625 }
4626 nvlist_free(policy);
4627 }
4628 }
4629
4630 if (error != 0)
4631 return (error);
4632
4633 spa_vdev_state_enter(spa, SCL_NONE);
4634
4635 if (zc->zc_guid == 0) {
4636 vd = NULL;
4637 } else {
4638 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4639 if (vd == NULL) {
4640 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4641 spa_close(spa, FTAG);
4642 return (SET_ERROR(ENODEV));
4643 }
4644 }
4645
4646 vdev_clear(spa, vd);
4647
4648 (void) spa_vdev_state_exit(spa, NULL, 0);
4649
4650 /*
4651 * Resume any suspended I/Os.
4652 */
4653 if (zio_resume(spa) != 0)
4654 error = SET_ERROR(EIO);
4655
4656 spa_close(spa, FTAG);
4657
4658 return (error);
4659 }
4660
4661 static int
4662 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4663 {
4664 spa_t *spa;
4665 int error;
4666
4667 error = spa_open(zc->zc_name, &spa, FTAG);
4668 if (error != 0)
4669 return (error);
4670
4671 spa_vdev_state_enter(spa, SCL_NONE);
4672
4673 /*
4674 * If a resilver is already in progress then set the
4675 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4676 * the scan as a side effect of the reopen. Otherwise, let
4677 * vdev_open() decided if a resilver is required.
4678 */
4679 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4680 vdev_reopen(spa->spa_root_vdev);
4681 spa->spa_scrub_reopen = B_FALSE;
4682
4683 (void) spa_vdev_state_exit(spa, NULL, 0);
4684 spa_close(spa, FTAG);
4685 return (0);
4686 }
4687 /*
4688 * inputs:
4689 * zc_name name of filesystem
4690 * zc_value name of origin snapshot
4691 *
4692 * outputs:
4693 * zc_string name of conflicting snapshot, if there is one
4694 */
4695 static int
4696 zfs_ioc_promote(zfs_cmd_t *zc)
4697 {
4698 char *cp;
4699
4700 /*
4701 * We don't need to unmount *all* the origin fs's snapshots, but
4702 * it's easier.
4703 */
4704 cp = strchr(zc->zc_value, '@');
4705 if (cp)
4706 *cp = '\0';
4707 (void) dmu_objset_find(zc->zc_value,
4708 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4709 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4710 }
4711
4712 /*
4713 * Retrieve a single {user|group}{used|quota}@... property.
4714 *
4715 * inputs:
4716 * zc_name name of filesystem
4717 * zc_objset_type zfs_userquota_prop_t
4718 * zc_value domain name (eg. "S-1-234-567-89")
4719 * zc_guid RID/UID/GID
4720 *
4721 * outputs:
4722 * zc_cookie property value
4723 */
4724 static int
4725 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4726 {
4727 zfsvfs_t *zfsvfs;
4728 int error;
4729
4730 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4731 return (SET_ERROR(EINVAL));
4732
4733 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4734 if (error != 0)
4735 return (error);
4736
4737 error = zfs_userspace_one(zfsvfs,
4738 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4739 zfsvfs_rele(zfsvfs, FTAG);
4740
4741 return (error);
4742 }
4743
4744 /*
4745 * inputs:
4746 * zc_name name of filesystem
4747 * zc_cookie zap cursor
4748 * zc_objset_type zfs_userquota_prop_t
4749 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4750 *
4751 * outputs:
4752 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4753 * zc_cookie zap cursor
4754 */
4755 static int
4756 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4757 {
4758 zfsvfs_t *zfsvfs;
4759 int bufsize = zc->zc_nvlist_dst_size;
4760
4761 if (bufsize <= 0)
4762 return (SET_ERROR(ENOMEM));
4763
4764 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4765 if (error != 0)
4766 return (error);
4767
4768 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4769
4770 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4771 buf, &zc->zc_nvlist_dst_size);
4772
4773 if (error == 0) {
4774 error = xcopyout(buf,
4775 (void *)(uintptr_t)zc->zc_nvlist_dst,
4776 zc->zc_nvlist_dst_size);
4777 }
4778 kmem_free(buf, bufsize);
4779 zfsvfs_rele(zfsvfs, FTAG);
4780
4781 return (error);
4782 }
4783
4784 /*
4785 * inputs:
4786 * zc_name name of filesystem
4787 *
4788 * outputs:
4789 * none
4790 */
4791 static int
4792 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4793 {
4794 objset_t *os;
4795 int error = 0;
4796 zfsvfs_t *zfsvfs;
4797
4798 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4799 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4800 /*
4801 * If userused is not enabled, it may be because the
4802 * objset needs to be closed & reopened (to grow the
4803 * objset_phys_t). Suspend/resume the fs will do that.
4804 */
4805 error = zfs_suspend_fs(zfsvfs);
4806 if (error == 0) {
4807 dmu_objset_refresh_ownership(zfsvfs->z_os,
4808 zfsvfs);
4809 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4810 }
4811 }
4812 if (error == 0)
4813 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4814 VFS_RELE(zfsvfs->z_vfs);
4815 } else {
4816 /* XXX kind of reading contents without owning */
4817 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4818 if (error != 0)
4819 return (error);
4820
4821 error = dmu_objset_userspace_upgrade(os);
4822 dmu_objset_rele(os, FTAG);
4823 }
4824
4825 return (error);
4826 }
4827
4828 /*
4829 * We don't want to have a hard dependency
4830 * against some special symbols in sharefs
4831 * nfs, and smbsrv. Determine them if needed when
4832 * the first file system is shared.
4833 * Neither sharefs, nfs or smbsrv are unloadable modules.
4834 */
4835 int (*znfsexport_fs)(void *arg);
4836 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4837 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4838
4839 int zfs_nfsshare_inited;
4840 int zfs_smbshare_inited;
4841
4842 ddi_modhandle_t nfs_mod;
4843 ddi_modhandle_t sharefs_mod;
4844 ddi_modhandle_t smbsrv_mod;
4845 kmutex_t zfs_share_lock;
4846
4847 static int
4848 zfs_init_sharefs()
4849 {
4850 int error;
4851
4852 ASSERT(MUTEX_HELD(&zfs_share_lock));
4853 /* Both NFS and SMB shares also require sharetab support. */
4854 if (sharefs_mod == NULL && ((sharefs_mod =
4855 ddi_modopen("fs/sharefs",
4856 KRTLD_MODE_FIRST, &error)) == NULL)) {
4857 return (SET_ERROR(ENOSYS));
4858 }
4859 if (zshare_fs == NULL && ((zshare_fs =
4860 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4861 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4862 return (SET_ERROR(ENOSYS));
4863 }
4864 return (0);
4865 }
4866
4867 static int
4868 zfs_ioc_share(zfs_cmd_t *zc)
4869 {
4870 int error;
4871 int opcode;
4872
4873 switch (zc->zc_share.z_sharetype) {
4874 case ZFS_SHARE_NFS:
4875 case ZFS_UNSHARE_NFS:
4876 if (zfs_nfsshare_inited == 0) {
4877 mutex_enter(&zfs_share_lock);
4878 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4879 KRTLD_MODE_FIRST, &error)) == NULL)) {
4880 mutex_exit(&zfs_share_lock);
4881 return (SET_ERROR(ENOSYS));
4882 }
4883 if (znfsexport_fs == NULL &&
4884 ((znfsexport_fs = (int (*)(void *))
4885 ddi_modsym(nfs_mod,
4886 "nfs_export", &error)) == NULL)) {
4887 mutex_exit(&zfs_share_lock);
4888 return (SET_ERROR(ENOSYS));
4889 }
4890 error = zfs_init_sharefs();
4891 if (error != 0) {
4892 mutex_exit(&zfs_share_lock);
4893 return (SET_ERROR(ENOSYS));
4894 }
4895 zfs_nfsshare_inited = 1;
4896 mutex_exit(&zfs_share_lock);
4897 }
4898 break;
4899 case ZFS_SHARE_SMB:
4900 case ZFS_UNSHARE_SMB:
4901 if (zfs_smbshare_inited == 0) {
4902 mutex_enter(&zfs_share_lock);
4903 if (smbsrv_mod == NULL && ((smbsrv_mod =
4904 ddi_modopen("drv/smbsrv",
4905 KRTLD_MODE_FIRST, &error)) == NULL)) {
4906 mutex_exit(&zfs_share_lock);
4907 return (SET_ERROR(ENOSYS));
4908 }
4909 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4910 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4911 "smb_server_share", &error)) == NULL)) {
4912 mutex_exit(&zfs_share_lock);
4913 return (SET_ERROR(ENOSYS));
4914 }
4915 error = zfs_init_sharefs();
4916 if (error != 0) {
4917 mutex_exit(&zfs_share_lock);
4918 return (SET_ERROR(ENOSYS));
4919 }
4920 zfs_smbshare_inited = 1;
4921 mutex_exit(&zfs_share_lock);
4922 }
4923 break;
4924 default:
4925 return (SET_ERROR(EINVAL));
4926 }
4927
4928 switch (zc->zc_share.z_sharetype) {
4929 case ZFS_SHARE_NFS:
4930 case ZFS_UNSHARE_NFS:
4931 if (error =
4932 znfsexport_fs((void *)
4933 (uintptr_t)zc->zc_share.z_exportdata))
4934 return (error);
4935 break;
4936 case ZFS_SHARE_SMB:
4937 case ZFS_UNSHARE_SMB:
4938 if (error = zsmbexport_fs((void *)
4939 (uintptr_t)zc->zc_share.z_exportdata,
4940 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4941 B_TRUE: B_FALSE)) {
4942 return (error);
4943 }
4944 break;
4945 }
4946
4947 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4948 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4949 SHAREFS_ADD : SHAREFS_REMOVE;
4950
4951 /*
4952 * Add or remove share from sharetab
4953 */
4954 error = zshare_fs(opcode,
4955 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4956 zc->zc_share.z_sharemax);
4957
4958 return (error);
4959
4960 }
4961
4962 ace_t full_access[] = {
4963 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4964 };
4965
4966 /*
4967 * inputs:
4968 * zc_name name of containing filesystem
4969 * zc_obj object # beyond which we want next in-use object #
4970 *
4971 * outputs:
4972 * zc_obj next in-use object #
4973 */
4974 static int
4975 zfs_ioc_next_obj(zfs_cmd_t *zc)
4976 {
4977 objset_t *os = NULL;
4978 int error;
4979
4980 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4981 if (error != 0)
4982 return (error);
4983
4984 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4985 dsl_dataset_phys(os->os_dsl_dataset)->ds_prev_snap_txg);
4986
4987 dmu_objset_rele(os, FTAG);
4988 return (error);
4989 }
4990
4991 /*
4992 * inputs:
4993 * zc_name name of filesystem
4994 * zc_value prefix name for snapshot
4995 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4996 *
4997 * outputs:
4998 * zc_value short name of new snapshot
4999 */
5000 static int
5001 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
5002 {
5003 char *snap_name;
5004 char *hold_name;
5005 int error;
5006 minor_t minor;
5007
5008 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
5009 if (error != 0)
5010 return (error);
5011
5012 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
5013 (u_longlong_t)ddi_get_lbolt64());
5014 hold_name = kmem_asprintf("%%%s", zc->zc_value);
5015
5016 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
5017 hold_name);
5018 if (error == 0)
5019 (void) strcpy(zc->zc_value, snap_name);
5020 strfree(snap_name);
5021 strfree(hold_name);
5022 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
5023 return (error);
5024 }
5025
5026 /*
5027 * inputs:
5028 * zc_name name of "to" snapshot
5029 * zc_value name of "from" snapshot
5030 * zc_cookie file descriptor to write diff data on
5031 *
5032 * outputs:
5033 * dmu_diff_record_t's to the file descriptor
5034 */
5035 static int
5036 zfs_ioc_diff(zfs_cmd_t *zc)
5037 {
5038 file_t *fp;
5039 offset_t off;
5040 int error;
5041
5042 fp = getf(zc->zc_cookie);
5043 if (fp == NULL)
5044 return (SET_ERROR(EBADF));
5045
5046 off = fp->f_offset;
5047
5048 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
5049
5050 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5051 fp->f_offset = off;
5052 releasef(zc->zc_cookie);
5053
5054 return (error);
5055 }
5056
5057 /*
5058 * Remove all ACL files in shares dir
5059 */
5060 static int
5061 zfs_smb_acl_purge(znode_t *dzp)
5062 {
5063 zap_cursor_t zc;
5064 zap_attribute_t zap;
5065 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
5066 int error;
5067
5068 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
5069 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
5070 zap_cursor_advance(&zc)) {
5071 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
5072 NULL, 0)) != 0)
5073 break;
5074 }
5075 zap_cursor_fini(&zc);
5076 return (error);
5077 }
5078
5079 static int
5080 zfs_ioc_smb_acl(zfs_cmd_t *zc)
5081 {
5082 vnode_t *vp;
5083 znode_t *dzp;
5084 vnode_t *resourcevp = NULL;
5085 znode_t *sharedir;
5086 zfsvfs_t *zfsvfs;
5087 nvlist_t *nvlist;
5088 char *src, *target;
5089 vattr_t vattr;
5090 vsecattr_t vsec;
5091 int error = 0;
5092
5093 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
5094 NO_FOLLOW, NULL, &vp)) != 0)
5095 return (error);
5096
5097 /* Now make sure mntpnt and dataset are ZFS */
5098
5099 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
5100 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
5101 zc->zc_name) != 0)) {
5102 VN_RELE(vp);
5103 return (SET_ERROR(EINVAL));
5104 }
5105
5106 dzp = VTOZ(vp);
5107 zfsvfs = dzp->z_zfsvfs;
5108 ZFS_ENTER(zfsvfs);
5109
5110 /*
5111 * Create share dir if its missing.
5112 */
5113 mutex_enter(&zfsvfs->z_lock);
5114 if (zfsvfs->z_shares_dir == 0) {
5115 dmu_tx_t *tx;
5116
5117 tx = dmu_tx_create(zfsvfs->z_os);
5118 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
5119 ZFS_SHARES_DIR);
5120 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
5121 error = dmu_tx_assign(tx, TXG_WAIT);
5122 if (error != 0) {
5123 dmu_tx_abort(tx);
5124 } else {
5125 error = zfs_create_share_dir(zfsvfs, tx);
5126 dmu_tx_commit(tx);
5127 }
5128 if (error != 0) {
5129 mutex_exit(&zfsvfs->z_lock);
5130 VN_RELE(vp);
5131 ZFS_EXIT(zfsvfs);
5132 return (error);
5133 }
5134 }
5135 mutex_exit(&zfsvfs->z_lock);
5136
5137 ASSERT(zfsvfs->z_shares_dir);
5138 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
5139 VN_RELE(vp);
5140 ZFS_EXIT(zfsvfs);
5141 return (error);
5142 }
5143
5144 switch (zc->zc_cookie) {
5145 case ZFS_SMB_ACL_ADD:
5146 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
5147 vattr.va_type = VREG;
5148 vattr.va_mode = S_IFREG|0777;
5149 vattr.va_uid = 0;
5150 vattr.va_gid = 0;
5151
5152 vsec.vsa_mask = VSA_ACE;
5153 vsec.vsa_aclentp = &full_access;
5154 vsec.vsa_aclentsz = sizeof (full_access);
5155 vsec.vsa_aclcnt = 1;
5156
5157 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
5158 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
5159 if (resourcevp)
5160 VN_RELE(resourcevp);
5161 break;
5162
5163 case ZFS_SMB_ACL_REMOVE:
5164 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
5165 NULL, 0);
5166 break;
5167
5168 case ZFS_SMB_ACL_RENAME:
5169 if ((error = get_nvlist(zc->zc_nvlist_src,
5170 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
5171 VN_RELE(vp);
5172 VN_RELE(ZTOV(sharedir));
5173 ZFS_EXIT(zfsvfs);
5174 return (error);
5175 }
5176 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
5177 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
5178 &target)) {
5179 VN_RELE(vp);
5180 VN_RELE(ZTOV(sharedir));
5181 ZFS_EXIT(zfsvfs);
5182 nvlist_free(nvlist);
5183 return (error);
5184 }
5185 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
5186 kcred, NULL, 0);
5187 nvlist_free(nvlist);
5188 break;
5189
5190 case ZFS_SMB_ACL_PURGE:
5191 error = zfs_smb_acl_purge(sharedir);
5192 break;
5193
5194 default:
5195 error = SET_ERROR(EINVAL);
5196 break;
5197 }
5198
5199 VN_RELE(vp);
5200 VN_RELE(ZTOV(sharedir));
5201
5202 ZFS_EXIT(zfsvfs);
5203
5204 return (error);
5205 }
5206
5207 /*
5208 * innvl: {
5209 * "holds" -> { snapname -> holdname (string), ... }
5210 * (optional) "cleanup_fd" -> fd (int32)
5211 * }
5212 *
5213 * outnvl: {
5214 * snapname -> error value (int32)
5215 * ...
5216 * }
5217 */
5218 /* ARGSUSED */
5219 static int
5220 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
5221 {
5222 nvpair_t *pair;
5223 nvlist_t *holds;
5224 int cleanup_fd = -1;
5225 int error;
5226 minor_t minor = 0;
5227
5228 error = nvlist_lookup_nvlist(args, "holds", &holds);
5229 if (error != 0)
5230 return (SET_ERROR(EINVAL));
5231
5232 /* make sure the user didn't pass us any invalid (empty) tags */
5233 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
5234 pair = nvlist_next_nvpair(holds, pair)) {
5235 char *htag;
5236
5237 error = nvpair_value_string(pair, &htag);
5238 if (error != 0)
5239 return (SET_ERROR(error));
5240
5241 if (strlen(htag) == 0)
5242 return (SET_ERROR(EINVAL));
5243 }
5244
5245 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
5246 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
5247 if (error != 0)
5248 return (error);
5249 }
5250
5251 error = dsl_dataset_user_hold(holds, minor, errlist);
5252 if (minor != 0)
5253 zfs_onexit_fd_rele(cleanup_fd);
5254 return (error);
5255 }
5256
5257 /*
5258 * innvl is not used.
5259 *
5260 * outnvl: {
5261 * holdname -> time added (uint64 seconds since epoch)
5262 * ...
5263 * }
5264 */
5265 /* ARGSUSED */
5266 static int
5267 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
5268 {
5269 return (dsl_dataset_get_holds(snapname, outnvl));
5270 }
5271
5272 /*
5273 * innvl: {
5274 * snapname -> { holdname, ... }
5275 * ...
5276 * }
5277 *
5278 * outnvl: {
5279 * snapname -> error value (int32)
5280 * ...
5281 * }
5282 */
5283 /* ARGSUSED */
5284 static int
5285 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
5286 {
5287 return (dsl_dataset_user_release(holds, errlist));
5288 }
5289
5290 /*
5291 * inputs:
5292 * zc_name name of new filesystem or snapshot
5293 * zc_value full name of old snapshot
5294 *
5295 * outputs:
5296 * zc_cookie space in bytes
5297 * zc_objset_type compressed space in bytes
5298 * zc_perm_action uncompressed space in bytes
5299 */
5300 static int
5301 zfs_ioc_space_written(zfs_cmd_t *zc)
5302 {
5303 int error;
5304 dsl_pool_t *dp;
5305 dsl_dataset_t *new, *old;
5306
5307 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5308 if (error != 0)
5309 return (error);
5310 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5311 if (error != 0) {
5312 dsl_pool_rele(dp, FTAG);
5313 return (error);
5314 }
5315 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5316 if (error != 0) {
5317 dsl_dataset_rele(new, FTAG);
5318 dsl_pool_rele(dp, FTAG);
5319 return (error);
5320 }
5321
5322 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5323 &zc->zc_objset_type, &zc->zc_perm_action);
5324 dsl_dataset_rele(old, FTAG);
5325 dsl_dataset_rele(new, FTAG);
5326 dsl_pool_rele(dp, FTAG);
5327 return (error);
5328 }
5329
5330 /*
5331 * innvl: {
5332 * "firstsnap" -> snapshot name
5333 * }
5334 *
5335 * outnvl: {
5336 * "used" -> space in bytes
5337 * "compressed" -> compressed space in bytes
5338 * "uncompressed" -> uncompressed space in bytes
5339 * }
5340 */
5341 static int
5342 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5343 {
5344 int error;
5345 dsl_pool_t *dp;
5346 dsl_dataset_t *new, *old;
5347 char *firstsnap;
5348 uint64_t used, comp, uncomp;
5349
5350 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5351 return (SET_ERROR(EINVAL));
5352
5353 error = dsl_pool_hold(lastsnap, FTAG, &dp);
5354 if (error != 0)
5355 return (error);
5356
5357 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5358 if (error == 0 && !new->ds_is_snapshot) {
5359 dsl_dataset_rele(new, FTAG);
5360 error = SET_ERROR(EINVAL);
5361 }
5362 if (error != 0) {
5363 dsl_pool_rele(dp, FTAG);
5364 return (error);
5365 }
5366 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5367 if (error == 0 && !old->ds_is_snapshot) {
5368 dsl_dataset_rele(old, FTAG);
5369 error = SET_ERROR(EINVAL);
5370 }
5371 if (error != 0) {
5372 dsl_dataset_rele(new, FTAG);
5373 dsl_pool_rele(dp, FTAG);
5374 return (error);
5375 }
5376
5377 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5378 dsl_dataset_rele(old, FTAG);
5379 dsl_dataset_rele(new, FTAG);
5380 dsl_pool_rele(dp, FTAG);
5381 fnvlist_add_uint64(outnvl, "used", used);
5382 fnvlist_add_uint64(outnvl, "compressed", comp);
5383 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5384 return (error);
5385 }
5386
5387 /*
5388 * innvl: {
5389 * "fd" -> file descriptor to write stream to (int32)
5390 * (optional) "fromsnap" -> full snap name to send an incremental from
5391 * (optional) "largeblockok" -> (value ignored)
5392 * indicates that blocks > 128KB are permitted
5393 * (optional) "embedok" -> (value ignored)
5394 * presence indicates DRR_WRITE_EMBEDDED records are permitted
5395 * (optional) "resume_object" and "resume_offset" -> (uint64)
5396 * if present, resume send stream from specified object and offset.
5397 * }
5398 *
5399 * outnvl is unused
5400 */
5401 /* ARGSUSED */
5402 static int
5403 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5404 {
5405 int error;
5406 offset_t off;
5407 char *fromname = NULL;
5408 int fd;
5409 boolean_t largeblockok;
5410 boolean_t embedok;
5411 uint64_t resumeobj = 0;
5412 uint64_t resumeoff = 0;
5413
5414 error = nvlist_lookup_int32(innvl, "fd", &fd);
5415 if (error != 0)
5416 return (SET_ERROR(EINVAL));
5417
5418 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5419
5420 largeblockok = nvlist_exists(innvl, "largeblockok");
5421 embedok = nvlist_exists(innvl, "embedok");
5422
5423 (void) nvlist_lookup_uint64(innvl, "resume_object", &resumeobj);
5424 (void) nvlist_lookup_uint64(innvl, "resume_offset", &resumeoff);
5425
5426 file_t *fp = getf(fd);
5427 if (fp == NULL)
5428 return (SET_ERROR(EBADF));
5429
5430 off = fp->f_offset;
5431 error = dmu_send(snapname, fromname, embedok, largeblockok, fd,
5432 resumeobj, resumeoff, fp->f_vnode, &off);
5433
5434 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5435 fp->f_offset = off;
5436 releasef(fd);
5437 return (error);
5438 }
5439
5440 /*
5441 * Determine approximately how large a zfs send stream will be -- the number
5442 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5443 *
5444 * innvl: {
5445 * (optional) "from" -> full snap or bookmark name to send an incremental
5446 * from
5447 * }
5448 *
5449 * outnvl: {
5450 * "space" -> bytes of space (uint64)
5451 * }
5452 */
5453 static int
5454 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5455 {
5456 dsl_pool_t *dp;
5457 dsl_dataset_t *tosnap;
5458 int error;
5459 char *fromname;
5460 uint64_t space;
5461
5462 error = dsl_pool_hold(snapname, FTAG, &dp);
5463 if (error != 0)
5464 return (error);
5465
5466 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5467 if (error != 0) {
5468 dsl_pool_rele(dp, FTAG);
5469 return (error);
5470 }
5471
5472 error = nvlist_lookup_string(innvl, "from", &fromname);
5473 if (error == 0) {
5474 if (strchr(fromname, '@') != NULL) {
5475 /*
5476 * If from is a snapshot, hold it and use the more
5477 * efficient dmu_send_estimate to estimate send space
5478 * size using deadlists.
5479 */
5480 dsl_dataset_t *fromsnap;
5481 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5482 if (error != 0)
5483 goto out;
5484 error = dmu_send_estimate(tosnap, fromsnap, &space);
5485 dsl_dataset_rele(fromsnap, FTAG);
5486 } else if (strchr(fromname, '#') != NULL) {
5487 /*
5488 * If from is a bookmark, fetch the creation TXG of the
5489 * snapshot it was created from and use that to find
5490 * blocks that were born after it.
5491 */
5492 zfs_bookmark_phys_t frombm;
5493
5494 error = dsl_bookmark_lookup(dp, fromname, tosnap,
5495 &frombm);
5496 if (error != 0)
5497 goto out;
5498 error = dmu_send_estimate_from_txg(tosnap,
5499 frombm.zbm_creation_txg, &space);
5500 } else {
5501 /*
5502 * from is not properly formatted as a snapshot or
5503 * bookmark
5504 */
5505 error = SET_ERROR(EINVAL);
5506 goto out;
5507 }
5508 } else {
5509 // If estimating the size of a full send, use dmu_send_estimate
5510 error = dmu_send_estimate(tosnap, NULL, &space);
5511 }
5512
5513 fnvlist_add_uint64(outnvl, "space", space);
5514
5515 out:
5516 dsl_dataset_rele(tosnap, FTAG);
5517 dsl_pool_rele(dp, FTAG);
5518 return (error);
5519 }
5520
5521 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5522
5523 static void
5524 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5525 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5526 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5527 {
5528 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5529
5530 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5531 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5532 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5533 ASSERT3P(vec->zvec_func, ==, NULL);
5534
5535 vec->zvec_legacy_func = func;
5536 vec->zvec_secpolicy = secpolicy;
5537 vec->zvec_namecheck = namecheck;
5538 vec->zvec_allow_log = log_history;
5539 vec->zvec_pool_check = pool_check;
5540 }
5541
5542 /*
5543 * See the block comment at the beginning of this file for details on
5544 * each argument to this function.
5545 */
5546 static void
5547 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5548 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5549 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5550 boolean_t allow_log)
5551 {
5552 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5553
5554 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5555 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5556 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5557 ASSERT3P(vec->zvec_func, ==, NULL);
5558
5559 /* if we are logging, the name must be valid */
5560 ASSERT(!allow_log || namecheck != NO_NAME);
5561
5562 vec->zvec_name = name;
5563 vec->zvec_func = func;
5564 vec->zvec_secpolicy = secpolicy;
5565 vec->zvec_namecheck = namecheck;
5566 vec->zvec_pool_check = pool_check;
5567 vec->zvec_smush_outnvlist = smush_outnvlist;
5568 vec->zvec_allow_log = allow_log;
5569 }
5570
5571 static void
5572 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5573 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5574 zfs_ioc_poolcheck_t pool_check)
5575 {
5576 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5577 POOL_NAME, log_history, pool_check);
5578 }
5579
5580 static void
5581 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5582 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5583 {
5584 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5585 DATASET_NAME, B_FALSE, pool_check);
5586 }
5587
5588 static void
5589 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5590 {
5591 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5592 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5593 }
5594
5595 static void
5596 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5597 zfs_secpolicy_func_t *secpolicy)
5598 {
5599 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5600 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5601 }
5602
5603 static void
5604 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5605 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5606 {
5607 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5608 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5609 }
5610
5611 static void
5612 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5613 {
5614 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5615 zfs_secpolicy_read);
5616 }
5617
5618 static void
5619 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5620 zfs_secpolicy_func_t *secpolicy)
5621 {
5622 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5623 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5624 }
5625
5626 static void
5627 zfs_ioctl_init(void)
5628 {
5629 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5630 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5631 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5632
5633 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5634 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5635 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5636
5637 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5638 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5639 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5640
5641 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5642 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5643 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5644
5645 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5646 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5647 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5648
5649 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5650 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5651 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5652
5653 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5654 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5655 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5656
5657 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5658 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5659 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5660
5661 zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5662 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5663 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5664 zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5665 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5666 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5667
5668 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5669 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5670 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5671
5672 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
5673 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
5674 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5675
5676 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK,
5677 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME,
5678 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5679
5680 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS,
5681 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME,
5682 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5683
5684 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS,
5685 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks,
5686 POOL_NAME,
5687 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5688
5689 /* IOCTLS that use the legacy function signature */
5690
5691 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5692 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5693
5694 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5695 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5696 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5697 zfs_ioc_pool_scan);
5698 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5699 zfs_ioc_pool_upgrade);
5700 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5701 zfs_ioc_vdev_add);
5702 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5703 zfs_ioc_vdev_remove);
5704 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5705 zfs_ioc_vdev_set_state);
5706 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5707 zfs_ioc_vdev_attach);
5708 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5709 zfs_ioc_vdev_detach);
5710 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5711 zfs_ioc_vdev_setpath);
5712 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5713 zfs_ioc_vdev_setfru);
5714 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5715 zfs_ioc_pool_set_props);
5716 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5717 zfs_ioc_vdev_split);
5718 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5719 zfs_ioc_pool_reguid);
5720
5721 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5722 zfs_ioc_pool_configs, zfs_secpolicy_none);
5723 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5724 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5725 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5726 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5727 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5728 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5729 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5730 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5731
5732 /*
5733 * pool destroy, and export don't log the history as part of
5734 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5735 * does the logging of those commands.
5736 */
5737 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5738 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5739 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5740 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5741
5742 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5743 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5744 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5745 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5746
5747 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5748 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5749 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5750 zfs_ioc_dsobj_to_dsname,
5751 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5752 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5753 zfs_ioc_pool_get_history,
5754 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5755
5756 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5757 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5758
5759 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5760 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5761 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5762 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5763
5764 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5765 zfs_ioc_space_written);
5766 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5767 zfs_ioc_objset_recvd_props);
5768 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5769 zfs_ioc_next_obj);
5770 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5771 zfs_ioc_get_fsacl);
5772 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5773 zfs_ioc_objset_stats);
5774 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5775 zfs_ioc_objset_zplprops);
5776 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5777 zfs_ioc_dataset_list_next);
5778 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5779 zfs_ioc_snapshot_list_next);
5780 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5781 zfs_ioc_send_progress);
5782
5783 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5784 zfs_ioc_diff, zfs_secpolicy_diff);
5785 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5786 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5787 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5788 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5789 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5790 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5791 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5792 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5793 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5794 zfs_ioc_send, zfs_secpolicy_send);
5795
5796 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5797 zfs_secpolicy_none);
5798 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5799 zfs_secpolicy_destroy);
5800 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5801 zfs_secpolicy_rename);
5802 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5803 zfs_secpolicy_recv);
5804 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5805 zfs_secpolicy_promote);
5806 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5807 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5808 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5809 zfs_secpolicy_set_fsacl);
5810
5811 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5812 zfs_secpolicy_share, POOL_CHECK_NONE);
5813 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5814 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5815 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5816 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5817 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5818 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5819 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5820 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5821 }
5822
5823 int
5824 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5825 zfs_ioc_poolcheck_t check)
5826 {
5827 spa_t *spa;
5828 int error;
5829
5830 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5831
5832 if (check & POOL_CHECK_NONE)
5833 return (0);
5834
5835 error = spa_open(name, &spa, FTAG);
5836 if (error == 0) {
5837 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5838 error = SET_ERROR(EAGAIN);
5839 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5840 error = SET_ERROR(EROFS);
5841 spa_close(spa, FTAG);
5842 }
5843 return (error);
5844 }
5845
5846 /*
5847 * Find a free minor number.
5848 */
5849 minor_t
5850 zfsdev_minor_alloc(void)
5851 {
5852 static minor_t last_minor;
5853 minor_t m;
5854
5855 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5856
5857 for (m = last_minor + 1; m != last_minor; m++) {
5858 if (m > ZFSDEV_MAX_MINOR)
5859 m = 1;
5860 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5861 last_minor = m;
5862 return (m);
5863 }
5864 }
5865
5866 return (0);
5867 }
5868
5869 static int
5870 zfs_ctldev_init(dev_t *devp)
5871 {
5872 minor_t minor;
5873 zfs_soft_state_t *zs;
5874
5875 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5876 ASSERT(getminor(*devp) == 0);
5877
5878 minor = zfsdev_minor_alloc();
5879 if (minor == 0)
5880 return (SET_ERROR(ENXIO));
5881
5882 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5883 return (SET_ERROR(EAGAIN));
5884
5885 *devp = makedevice(getemajor(*devp), minor);
5886
5887 zs = ddi_get_soft_state(zfsdev_state, minor);
5888 zs->zss_type = ZSST_CTLDEV;
5889 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5890
5891 return (0);
5892 }
5893
5894 static void
5895 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5896 {
5897 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5898
5899 zfs_onexit_destroy(zo);
5900 ddi_soft_state_free(zfsdev_state, minor);
5901 }
5902
5903 void *
5904 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5905 {
5906 zfs_soft_state_t *zp;
5907
5908 zp = ddi_get_soft_state(zfsdev_state, minor);
5909 if (zp == NULL || zp->zss_type != which)
5910 return (NULL);
5911
5912 return (zp->zss_data);
5913 }
5914
5915 static int
5916 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5917 {
5918 int error = 0;
5919
5920 if (getminor(*devp) != 0)
5921 return (zvol_open(devp, flag, otyp, cr));
5922
5923 /* This is the control device. Allocate a new minor if requested. */
5924 if (flag & FEXCL) {
5925 mutex_enter(&zfsdev_state_lock);
5926 error = zfs_ctldev_init(devp);
5927 mutex_exit(&zfsdev_state_lock);
5928 }
5929
5930 return (error);
5931 }
5932
5933 static int
5934 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5935 {
5936 zfs_onexit_t *zo;
5937 minor_t minor = getminor(dev);
5938
5939 if (minor == 0)
5940 return (0);
5941
5942 mutex_enter(&zfsdev_state_lock);
5943 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5944 if (zo == NULL) {
5945 mutex_exit(&zfsdev_state_lock);
5946 return (zvol_close(dev, flag, otyp, cr));
5947 }
5948 zfs_ctldev_destroy(zo, minor);
5949 mutex_exit(&zfsdev_state_lock);
5950
5951 return (0);
5952 }
5953
5954 static int
5955 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5956 {
5957 zfs_cmd_t *zc;
5958 uint_t vecnum;
5959 int error, rc, len;
5960 minor_t minor = getminor(dev);
5961 const zfs_ioc_vec_t *vec;
5962 char *saved_poolname = NULL;
5963 nvlist_t *innvl = NULL;
5964
5965 if (minor != 0 &&
5966 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5967 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5968
5969 vecnum = cmd - ZFS_IOC_FIRST;
5970 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5971
5972 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5973 return (SET_ERROR(EINVAL));
5974 vec = &zfs_ioc_vec[vecnum];
5975
5976 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5977
5978 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5979 if (error != 0) {
5980 error = SET_ERROR(EFAULT);
5981 goto out;
5982 }
5983
5984 zc->zc_iflags = flag & FKIOCTL;
5985 if (zc->zc_nvlist_src_size != 0) {
5986 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5987 zc->zc_iflags, &innvl);
5988 if (error != 0)
5989 goto out;
5990 }
5991
5992 /*
5993 * Ensure that all pool/dataset names are valid before we pass down to
5994 * the lower layers.
5995 */
5996 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5997 switch (vec->zvec_namecheck) {
5998 case POOL_NAME:
5999 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
6000 error = SET_ERROR(EINVAL);
6001 else
6002 error = pool_status_check(zc->zc_name,
6003 vec->zvec_namecheck, vec->zvec_pool_check);
6004 break;
6005
6006 case DATASET_NAME:
6007 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
6008 error = SET_ERROR(EINVAL);
6009 else
6010 error = pool_status_check(zc->zc_name,
6011 vec->zvec_namecheck, vec->zvec_pool_check);
6012 break;
6013
6014 case NO_NAME:
6015 break;
6016 }
6017
6018
6019 if (error == 0 && !(flag & FKIOCTL))
6020 error = vec->zvec_secpolicy(zc, innvl, cr);
6021
6022 if (error != 0)
6023 goto out;
6024
6025 /* legacy ioctls can modify zc_name */
6026 len = strcspn(zc->zc_name, "/@#") + 1;
6027 saved_poolname = kmem_alloc(len, KM_SLEEP);
6028 (void) strlcpy(saved_poolname, zc->zc_name, len);
6029
6030 if (vec->zvec_func != NULL) {
6031 nvlist_t *outnvl;
6032 int puterror = 0;
6033 spa_t *spa;
6034 nvlist_t *lognv = NULL;
6035
6036 ASSERT(vec->zvec_legacy_func == NULL);
6037
6038 /*
6039 * Add the innvl to the lognv before calling the func,
6040 * in case the func changes the innvl.
6041 */
6042 if (vec->zvec_allow_log) {
6043 lognv = fnvlist_alloc();
6044 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
6045 vec->zvec_name);
6046 if (!nvlist_empty(innvl)) {
6047 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
6048 innvl);
6049 }
6050 }
6051
6052 outnvl = fnvlist_alloc();
6053 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
6054
6055 if (error == 0 && vec->zvec_allow_log &&
6056 spa_open(zc->zc_name, &spa, FTAG) == 0) {
6057 if (!nvlist_empty(outnvl)) {
6058 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
6059 outnvl);
6060 }
6061 (void) spa_history_log_nvl(spa, lognv);
6062 spa_close(spa, FTAG);
6063 }
6064 fnvlist_free(lognv);
6065
6066 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
6067 int smusherror = 0;
6068 if (vec->zvec_smush_outnvlist) {
6069 smusherror = nvlist_smush(outnvl,
6070 zc->zc_nvlist_dst_size);
6071 }
6072 if (smusherror == 0)
6073 puterror = put_nvlist(zc, outnvl);
6074 }
6075
6076 if (puterror != 0)
6077 error = puterror;
6078
6079 nvlist_free(outnvl);
6080 } else {
6081 error = vec->zvec_legacy_func(zc);
6082 }
6083
6084 out:
6085 nvlist_free(innvl);
6086 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
6087 if (error == 0 && rc != 0)
6088 error = SET_ERROR(EFAULT);
6089 if (error == 0 && vec->zvec_allow_log) {
6090 char *s = tsd_get(zfs_allow_log_key);
6091 if (s != NULL)
6092 strfree(s);
6093 (void) tsd_set(zfs_allow_log_key, saved_poolname);
6094 } else {
6095 if (saved_poolname != NULL)
6096 strfree(saved_poolname);
6097 }
6098
6099 kmem_free(zc, sizeof (zfs_cmd_t));
6100 return (error);
6101 }
6102
6103 static int
6104 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
6105 {
6106 if (cmd != DDI_ATTACH)
6107 return (DDI_FAILURE);
6108
6109 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
6110 DDI_PSEUDO, 0) == DDI_FAILURE)
6111 return (DDI_FAILURE);
6112
6113 zfs_dip = dip;
6114
6115 ddi_report_dev(dip);
6116
6117 return (DDI_SUCCESS);
6118 }
6119
6120 static int
6121 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
6122 {
6123 if (spa_busy() || zfs_busy() || zvol_busy())
6124 return (DDI_FAILURE);
6125
6126 if (cmd != DDI_DETACH)
6127 return (DDI_FAILURE);
6128
6129 zfs_dip = NULL;
6130
6131 ddi_prop_remove_all(dip);
6132 ddi_remove_minor_node(dip, NULL);
6133
6134 return (DDI_SUCCESS);
6135 }
6136
6137 /*ARGSUSED*/
6138 static int
6139 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
6140 {
6141 switch (infocmd) {
6142 case DDI_INFO_DEVT2DEVINFO:
6143 *result = zfs_dip;
6144 return (DDI_SUCCESS);
6145
6146 case DDI_INFO_DEVT2INSTANCE:
6147 *result = (void *)0;
6148 return (DDI_SUCCESS);
6149 }
6150
6151 return (DDI_FAILURE);
6152 }
6153
6154 /*
6155 * OK, so this is a little weird.
6156 *
6157 * /dev/zfs is the control node, i.e. minor 0.
6158 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
6159 *
6160 * /dev/zfs has basically nothing to do except serve up ioctls,
6161 * so most of the standard driver entry points are in zvol.c.
6162 */
6163 static struct cb_ops zfs_cb_ops = {
6164 zfsdev_open, /* open */
6165 zfsdev_close, /* close */
6166 zvol_strategy, /* strategy */
6167 nodev, /* print */
6168 zvol_dump, /* dump */
6169 zvol_read, /* read */
6170 zvol_write, /* write */
6171 zfsdev_ioctl, /* ioctl */
6172 nodev, /* devmap */
6173 nodev, /* mmap */
6174 nodev, /* segmap */
6175 nochpoll, /* poll */
6176 ddi_prop_op, /* prop_op */
6177 NULL, /* streamtab */
6178 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
6179 CB_REV, /* version */
6180 nodev, /* async read */
6181 nodev, /* async write */
6182 };
6183
6184 static struct dev_ops zfs_dev_ops = {
6185 DEVO_REV, /* version */
6186 0, /* refcnt */
6187 zfs_info, /* info */
6188 nulldev, /* identify */
6189 nulldev, /* probe */
6190 zfs_attach, /* attach */
6191 zfs_detach, /* detach */
6192 nodev, /* reset */
6193 &zfs_cb_ops, /* driver operations */
6194 NULL, /* no bus operations */
6195 NULL, /* power */
6196 ddi_quiesce_not_needed, /* quiesce */
6197 };
6198
6199 static struct modldrv zfs_modldrv = {
6200 &mod_driverops,
6201 "ZFS storage pool",
6202 &zfs_dev_ops
6203 };
6204
6205 static struct modlinkage modlinkage = {
6206 MODREV_1,
6207 (void *)&zfs_modlfs,
6208 (void *)&zfs_modldrv,
6209 NULL
6210 };
6211
6212 static void
6213 zfs_allow_log_destroy(void *arg)
6214 {
6215 char *poolname = arg;
6216 strfree(poolname);
6217 }
6218
6219 int
6220 _init(void)
6221 {
6222 int error;
6223
6224 spa_init(FREAD | FWRITE);
6225 zfs_init();
6226 zvol_init();
6227 zfs_ioctl_init();
6228
6229 if ((error = mod_install(&modlinkage)) != 0) {
6230 zvol_fini();
6231 zfs_fini();
6232 spa_fini();
6233 return (error);
6234 }
6235
6236 tsd_create(&zfs_fsyncer_key, NULL);
6237 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
6238 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
6239
6240 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
6241 ASSERT(error == 0);
6242 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
6243
6244 return (0);
6245 }
6246
6247 int
6248 _fini(void)
6249 {
6250 int error;
6251
6252 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
6253 return (SET_ERROR(EBUSY));
6254
6255 if ((error = mod_remove(&modlinkage)) != 0)
6256 return (error);
6257
6258 zvol_fini();
6259 zfs_fini();
6260 spa_fini();
6261 if (zfs_nfsshare_inited)
6262 (void) ddi_modclose(nfs_mod);
6263 if (zfs_smbshare_inited)
6264 (void) ddi_modclose(smbsrv_mod);
6265 if (zfs_nfsshare_inited || zfs_smbshare_inited)
6266 (void) ddi_modclose(sharefs_mod);
6267
6268 tsd_destroy(&zfs_fsyncer_key);
6269 ldi_ident_release(zfs_li);
6270 zfs_li = NULL;
6271 mutex_destroy(&zfs_share_lock);
6272
6273 return (error);
6274 }
6275
6276 int
6277 _info(struct modinfo *modinfop)
6278 {
6279 return (mod_info(&modlinkage, modinfop));
6280 }