1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Portions Copyright 2011 Martin Matuska
25 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2014, Joyent, Inc. All rights reserved.
27 * Copyright (c) 2013 by Delphix. All rights reserved.
28 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
29 * Copyright (c) 2013 Steven Hartland. All rights reserved.
30 */
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
184 #include "zfs_namecheck.h"
185 #include "zfs_prop.h"
186 #include "zfs_deleg.h"
187 #include "zfs_comutil.h"
188
189 extern struct modlfs zfs_modlfs;
190
191 extern void zfs_init(void);
192 extern void zfs_fini(void);
193
194 ldi_ident_t zfs_li = NULL;
195 dev_info_t *zfs_dip;
196
197 uint_t zfs_fsyncer_key;
198 extern uint_t rrw_tsd_key;
199 static uint_t zfs_allow_log_key;
200
201 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
202 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
203 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
204
205 typedef enum {
206 NO_NAME,
207 POOL_NAME,
208 DATASET_NAME
209 } zfs_ioc_namecheck_t;
210
211 typedef enum {
212 POOL_CHECK_NONE = 1 << 0,
213 POOL_CHECK_SUSPENDED = 1 << 1,
214 POOL_CHECK_READONLY = 1 << 2,
215 } zfs_ioc_poolcheck_t;
216
217 typedef struct zfs_ioc_vec {
218 zfs_ioc_legacy_func_t *zvec_legacy_func;
219 zfs_ioc_func_t *zvec_func;
220 zfs_secpolicy_func_t *zvec_secpolicy;
221 zfs_ioc_namecheck_t zvec_namecheck;
222 boolean_t zvec_allow_log;
223 zfs_ioc_poolcheck_t zvec_pool_check;
224 boolean_t zvec_smush_outnvlist;
225 const char *zvec_name;
226 } zfs_ioc_vec_t;
227
228 /* This array is indexed by zfs_userquota_prop_t */
229 static const char *userquota_perms[] = {
230 ZFS_DELEG_PERM_USERUSED,
231 ZFS_DELEG_PERM_USERQUOTA,
232 ZFS_DELEG_PERM_GROUPUSED,
233 ZFS_DELEG_PERM_GROUPQUOTA,
234 };
235
236 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
237 static int zfs_check_settable(const char *name, nvpair_t *property,
238 cred_t *cr);
239 static int zfs_check_clearable(char *dataset, nvlist_t *props,
240 nvlist_t **errors);
241 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
242 boolean_t *);
243 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
244 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
245
246 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature);
247
248 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
249 void
250 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
251 {
252 const char *newfile;
253 char buf[512];
254 va_list adx;
255
256 /*
257 * Get rid of annoying "../common/" prefix to filename.
258 */
259 newfile = strrchr(file, '/');
260 if (newfile != NULL) {
261 newfile = newfile + 1; /* Get rid of leading / */
262 } else {
263 newfile = file;
264 }
265
266 va_start(adx, fmt);
267 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
268 va_end(adx);
269
270 /*
271 * To get this data, use the zfs-dprintf probe as so:
272 * dtrace -q -n 'zfs-dprintf \
273 * /stringof(arg0) == "dbuf.c"/ \
274 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
275 * arg0 = file name
276 * arg1 = function name
277 * arg2 = line number
278 * arg3 = message
279 */
280 DTRACE_PROBE4(zfs__dprintf,
281 char *, newfile, char *, func, int, line, char *, buf);
282 }
283
284 static void
285 history_str_free(char *buf)
286 {
287 kmem_free(buf, HIS_MAX_RECORD_LEN);
288 }
289
290 static char *
291 history_str_get(zfs_cmd_t *zc)
292 {
293 char *buf;
294
295 if (zc->zc_history == NULL)
296 return (NULL);
297
298 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
299 if (copyinstr((void *)(uintptr_t)zc->zc_history,
300 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
301 history_str_free(buf);
302 return (NULL);
303 }
304
305 buf[HIS_MAX_RECORD_LEN -1] = '\0';
306
307 return (buf);
308 }
309
310 /*
311 * Check to see if the named dataset is currently defined as bootable
312 */
313 static boolean_t
314 zfs_is_bootfs(const char *name)
315 {
316 objset_t *os;
317
318 if (dmu_objset_hold(name, FTAG, &os) == 0) {
319 boolean_t ret;
320 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
321 dmu_objset_rele(os, FTAG);
322 return (ret);
323 }
324 return (B_FALSE);
325 }
326
327 /*
328 * Return non-zero if the spa version is less than requested version.
329 */
330 static int
331 zfs_earlier_version(const char *name, int version)
332 {
333 spa_t *spa;
334
335 if (spa_open(name, &spa, FTAG) == 0) {
336 if (spa_version(spa) < version) {
337 spa_close(spa, FTAG);
338 return (1);
339 }
340 spa_close(spa, FTAG);
341 }
342 return (0);
343 }
344
345 /*
346 * Return TRUE if the ZPL version is less than requested version.
347 */
348 static boolean_t
349 zpl_earlier_version(const char *name, int version)
350 {
351 objset_t *os;
352 boolean_t rc = B_TRUE;
353
354 if (dmu_objset_hold(name, FTAG, &os) == 0) {
355 uint64_t zplversion;
356
357 if (dmu_objset_type(os) != DMU_OST_ZFS) {
358 dmu_objset_rele(os, FTAG);
359 return (B_TRUE);
360 }
361 /* XXX reading from non-owned objset */
362 if (zfs_get_zplprop(os, ZFS_PROP_VERSION, &zplversion) == 0)
363 rc = zplversion < version;
364 dmu_objset_rele(os, FTAG);
365 }
366 return (rc);
367 }
368
369 static void
370 zfs_log_history(zfs_cmd_t *zc)
371 {
372 spa_t *spa;
373 char *buf;
374
375 if ((buf = history_str_get(zc)) == NULL)
376 return;
377
378 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
379 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
380 (void) spa_history_log(spa, buf);
381 spa_close(spa, FTAG);
382 }
383 history_str_free(buf);
384 }
385
386 /*
387 * Policy for top-level read operations (list pools). Requires no privileges,
388 * and can be used in the local zone, as there is no associated dataset.
389 */
390 /* ARGSUSED */
391 static int
392 zfs_secpolicy_none(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
393 {
394 return (0);
395 }
396
397 /*
398 * Policy for dataset read operations (list children, get statistics). Requires
399 * no privileges, but must be visible in the local zone.
400 */
401 /* ARGSUSED */
402 static int
403 zfs_secpolicy_read(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
404 {
405 if (INGLOBALZONE(curproc) ||
406 zone_dataset_visible(zc->zc_name, NULL))
407 return (0);
408
409 return (SET_ERROR(ENOENT));
410 }
411
412 static int
413 zfs_dozonecheck_impl(const char *dataset, uint64_t zoned, cred_t *cr)
414 {
415 int writable = 1;
416
417 /*
418 * The dataset must be visible by this zone -- check this first
419 * so they don't see EPERM on something they shouldn't know about.
420 */
421 if (!INGLOBALZONE(curproc) &&
422 !zone_dataset_visible(dataset, &writable))
423 return (SET_ERROR(ENOENT));
424
425 if (INGLOBALZONE(curproc)) {
426 /*
427 * If the fs is zoned, only root can access it from the
428 * global zone.
429 */
430 if (secpolicy_zfs(cr) && zoned)
431 return (SET_ERROR(EPERM));
432 } else {
433 /*
434 * If we are in a local zone, the 'zoned' property must be set.
435 */
436 if (!zoned)
437 return (SET_ERROR(EPERM));
438
439 /* must be writable by this zone */
440 if (!writable)
441 return (SET_ERROR(EPERM));
442 }
443 return (0);
444 }
445
446 static int
447 zfs_dozonecheck(const char *dataset, cred_t *cr)
448 {
449 uint64_t zoned;
450
451 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
452 return (SET_ERROR(ENOENT));
453
454 return (zfs_dozonecheck_impl(dataset, zoned, cr));
455 }
456
457 static int
458 zfs_dozonecheck_ds(const char *dataset, dsl_dataset_t *ds, cred_t *cr)
459 {
460 uint64_t zoned;
461
462 if (dsl_prop_get_int_ds(ds, "zoned", &zoned))
463 return (SET_ERROR(ENOENT));
464
465 return (zfs_dozonecheck_impl(dataset, zoned, cr));
466 }
467
468 static int
469 zfs_secpolicy_write_perms_ds(const char *name, dsl_dataset_t *ds,
470 const char *perm, cred_t *cr)
471 {
472 int error;
473
474 error = zfs_dozonecheck_ds(name, ds, cr);
475 if (error == 0) {
476 error = secpolicy_zfs(cr);
477 if (error != 0)
478 error = dsl_deleg_access_impl(ds, perm, cr);
479 }
480 return (error);
481 }
482
483 static int
484 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
485 {
486 int error;
487 dsl_dataset_t *ds;
488 dsl_pool_t *dp;
489
490 error = dsl_pool_hold(name, FTAG, &dp);
491 if (error != 0)
492 return (error);
493
494 error = dsl_dataset_hold(dp, name, FTAG, &ds);
495 if (error != 0) {
496 dsl_pool_rele(dp, FTAG);
497 return (error);
498 }
499
500 error = zfs_secpolicy_write_perms_ds(name, ds, perm, cr);
501
502 dsl_dataset_rele(ds, FTAG);
503 dsl_pool_rele(dp, FTAG);
504 return (error);
505 }
506
507 /*
508 * Policy for setting the security label property.
509 *
510 * Returns 0 for success, non-zero for access and other errors.
511 */
512 static int
513 zfs_set_slabel_policy(const char *name, char *strval, cred_t *cr)
514 {
515 char ds_hexsl[MAXNAMELEN];
516 bslabel_t ds_sl, new_sl;
517 boolean_t new_default = FALSE;
518 uint64_t zoned;
519 int needed_priv = -1;
520 int error;
521
522 /* First get the existing dataset label. */
523 error = dsl_prop_get(name, zfs_prop_to_name(ZFS_PROP_MLSLABEL),
524 1, sizeof (ds_hexsl), &ds_hexsl, NULL);
525 if (error != 0)
526 return (SET_ERROR(EPERM));
527
528 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
529 new_default = TRUE;
530
531 /* The label must be translatable */
532 if (!new_default && (hexstr_to_label(strval, &new_sl) != 0))
533 return (SET_ERROR(EINVAL));
534
535 /*
536 * In a non-global zone, disallow attempts to set a label that
537 * doesn't match that of the zone; otherwise no other checks
538 * are needed.
539 */
540 if (!INGLOBALZONE(curproc)) {
541 if (new_default || !blequal(&new_sl, CR_SL(CRED())))
542 return (SET_ERROR(EPERM));
543 return (0);
544 }
545
546 /*
547 * For global-zone datasets (i.e., those whose zoned property is
548 * "off", verify that the specified new label is valid for the
549 * global zone.
550 */
551 if (dsl_prop_get_integer(name,
552 zfs_prop_to_name(ZFS_PROP_ZONED), &zoned, NULL))
553 return (SET_ERROR(EPERM));
554 if (!zoned) {
555 if (zfs_check_global_label(name, strval) != 0)
556 return (SET_ERROR(EPERM));
557 }
558
559 /*
560 * If the existing dataset label is nondefault, check if the
561 * dataset is mounted (label cannot be changed while mounted).
562 * Get the zfsvfs; if there isn't one, then the dataset isn't
563 * mounted (or isn't a dataset, doesn't exist, ...).
564 */
565 if (strcasecmp(ds_hexsl, ZFS_MLSLABEL_DEFAULT) != 0) {
566 objset_t *os;
567 static char *setsl_tag = "setsl_tag";
568
569 /*
570 * Try to own the dataset; abort if there is any error,
571 * (e.g., already mounted, in use, or other error).
572 */
573 error = dmu_objset_own(name, DMU_OST_ZFS, B_TRUE,
574 setsl_tag, &os);
575 if (error != 0)
576 return (SET_ERROR(EPERM));
577
578 dmu_objset_disown(os, setsl_tag);
579
580 if (new_default) {
581 needed_priv = PRIV_FILE_DOWNGRADE_SL;
582 goto out_check;
583 }
584
585 if (hexstr_to_label(strval, &new_sl) != 0)
586 return (SET_ERROR(EPERM));
587
588 if (blstrictdom(&ds_sl, &new_sl))
589 needed_priv = PRIV_FILE_DOWNGRADE_SL;
590 else if (blstrictdom(&new_sl, &ds_sl))
591 needed_priv = PRIV_FILE_UPGRADE_SL;
592 } else {
593 /* dataset currently has a default label */
594 if (!new_default)
595 needed_priv = PRIV_FILE_UPGRADE_SL;
596 }
597
598 out_check:
599 if (needed_priv != -1)
600 return (PRIV_POLICY(cr, needed_priv, B_FALSE, EPERM, NULL));
601 return (0);
602 }
603
604 static int
605 zfs_secpolicy_setprop(const char *dsname, zfs_prop_t prop, nvpair_t *propval,
606 cred_t *cr)
607 {
608 char *strval;
609
610 /*
611 * Check permissions for special properties.
612 */
613 switch (prop) {
614 case ZFS_PROP_ZONED:
615 /*
616 * Disallow setting of 'zoned' from within a local zone.
617 */
618 if (!INGLOBALZONE(curproc))
619 return (SET_ERROR(EPERM));
620 break;
621
622 case ZFS_PROP_QUOTA:
623 case ZFS_PROP_FILESYSTEM_LIMIT:
624 case ZFS_PROP_SNAPSHOT_LIMIT:
625 if (!INGLOBALZONE(curproc)) {
626 uint64_t zoned;
627 char setpoint[MAXNAMELEN];
628 /*
629 * Unprivileged users are allowed to modify the
630 * limit on things *under* (ie. contained by)
631 * the thing they own.
632 */
633 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
634 setpoint))
635 return (SET_ERROR(EPERM));
636 if (!zoned || strlen(dsname) <= strlen(setpoint))
637 return (SET_ERROR(EPERM));
638 }
639 break;
640
641 case ZFS_PROP_MLSLABEL:
642 if (!is_system_labeled())
643 return (SET_ERROR(EPERM));
644
645 if (nvpair_value_string(propval, &strval) == 0) {
646 int err;
647
648 err = zfs_set_slabel_policy(dsname, strval, CRED());
649 if (err != 0)
650 return (err);
651 }
652 break;
653 }
654
655 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
656 }
657
658 /* ARGSUSED */
659 static int
660 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
661 {
662 int error;
663
664 error = zfs_dozonecheck(zc->zc_name, cr);
665 if (error != 0)
666 return (error);
667
668 /*
669 * permission to set permissions will be evaluated later in
670 * dsl_deleg_can_allow()
671 */
672 return (0);
673 }
674
675 /* ARGSUSED */
676 static int
677 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
678 {
679 return (zfs_secpolicy_write_perms(zc->zc_name,
680 ZFS_DELEG_PERM_ROLLBACK, cr));
681 }
682
683 /* ARGSUSED */
684 static int
685 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
686 {
687 dsl_pool_t *dp;
688 dsl_dataset_t *ds;
689 char *cp;
690 int error;
691
692 /*
693 * Generate the current snapshot name from the given objsetid, then
694 * use that name for the secpolicy/zone checks.
695 */
696 cp = strchr(zc->zc_name, '@');
697 if (cp == NULL)
698 return (SET_ERROR(EINVAL));
699 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
700 if (error != 0)
701 return (error);
702
703 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
704 if (error != 0) {
705 dsl_pool_rele(dp, FTAG);
706 return (error);
707 }
708
709 dsl_dataset_name(ds, zc->zc_name);
710
711 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
712 ZFS_DELEG_PERM_SEND, cr);
713 dsl_dataset_rele(ds, FTAG);
714 dsl_pool_rele(dp, FTAG);
715
716 return (error);
717 }
718
719 /* ARGSUSED */
720 static int
721 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
722 {
723 return (zfs_secpolicy_write_perms(zc->zc_name,
724 ZFS_DELEG_PERM_SEND, cr));
725 }
726
727 /* ARGSUSED */
728 static int
729 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
730 {
731 vnode_t *vp;
732 int error;
733
734 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
735 NO_FOLLOW, NULL, &vp)) != 0)
736 return (error);
737
738 /* Now make sure mntpnt and dataset are ZFS */
739
740 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
741 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
742 zc->zc_name) != 0)) {
743 VN_RELE(vp);
744 return (SET_ERROR(EPERM));
745 }
746
747 VN_RELE(vp);
748 return (dsl_deleg_access(zc->zc_name,
749 ZFS_DELEG_PERM_SHARE, cr));
750 }
751
752 int
753 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
754 {
755 if (!INGLOBALZONE(curproc))
756 return (SET_ERROR(EPERM));
757
758 if (secpolicy_nfs(cr) == 0) {
759 return (0);
760 } else {
761 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
762 }
763 }
764
765 int
766 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
767 {
768 if (!INGLOBALZONE(curproc))
769 return (SET_ERROR(EPERM));
770
771 if (secpolicy_smb(cr) == 0) {
772 return (0);
773 } else {
774 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
775 }
776 }
777
778 static int
779 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
780 {
781 char *cp;
782
783 /*
784 * Remove the @bla or /bla from the end of the name to get the parent.
785 */
786 (void) strncpy(parent, datasetname, parentsize);
787 cp = strrchr(parent, '@');
788 if (cp != NULL) {
789 cp[0] = '\0';
790 } else {
791 cp = strrchr(parent, '/');
792 if (cp == NULL)
793 return (SET_ERROR(ENOENT));
794 cp[0] = '\0';
795 }
796
797 return (0);
798 }
799
800 int
801 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
802 {
803 int error;
804
805 if ((error = zfs_secpolicy_write_perms(name,
806 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
807 return (error);
808
809 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
810 }
811
812 /* ARGSUSED */
813 static int
814 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
815 {
816 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
817 }
818
819 /*
820 * Destroying snapshots with delegated permissions requires
821 * descendant mount and destroy permissions.
822 */
823 /* ARGSUSED */
824 static int
825 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
826 {
827 nvlist_t *snaps;
828 nvpair_t *pair, *nextpair;
829 int error = 0;
830
831 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
832 return (SET_ERROR(EINVAL));
833 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
834 pair = nextpair) {
835 nextpair = nvlist_next_nvpair(snaps, pair);
836 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr);
837 if (error == ENOENT) {
838 /*
839 * Ignore any snapshots that don't exist (we consider
840 * them "already destroyed"). Remove the name from the
841 * nvl here in case the snapshot is created between
842 * now and when we try to destroy it (in which case
843 * we don't want to destroy it since we haven't
844 * checked for permission).
845 */
846 fnvlist_remove_nvpair(snaps, pair);
847 error = 0;
848 }
849 if (error != 0)
850 break;
851 }
852
853 return (error);
854 }
855
856 int
857 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
858 {
859 char parentname[MAXNAMELEN];
860 int error;
861
862 if ((error = zfs_secpolicy_write_perms(from,
863 ZFS_DELEG_PERM_RENAME, cr)) != 0)
864 return (error);
865
866 if ((error = zfs_secpolicy_write_perms(from,
867 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
868 return (error);
869
870 if ((error = zfs_get_parent(to, parentname,
871 sizeof (parentname))) != 0)
872 return (error);
873
874 if ((error = zfs_secpolicy_write_perms(parentname,
875 ZFS_DELEG_PERM_CREATE, cr)) != 0)
876 return (error);
877
878 if ((error = zfs_secpolicy_write_perms(parentname,
879 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
880 return (error);
881
882 return (error);
883 }
884
885 /* ARGSUSED */
886 static int
887 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
888 {
889 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
890 }
891
892 /* ARGSUSED */
893 static int
894 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
895 {
896 dsl_pool_t *dp;
897 dsl_dataset_t *clone;
898 int error;
899
900 error = zfs_secpolicy_write_perms(zc->zc_name,
901 ZFS_DELEG_PERM_PROMOTE, cr);
902 if (error != 0)
903 return (error);
904
905 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
906 if (error != 0)
907 return (error);
908
909 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
910
911 if (error == 0) {
912 char parentname[MAXNAMELEN];
913 dsl_dataset_t *origin = NULL;
914 dsl_dir_t *dd;
915 dd = clone->ds_dir;
916
917 error = dsl_dataset_hold_obj(dd->dd_pool,
918 dd->dd_phys->dd_origin_obj, FTAG, &origin);
919 if (error != 0) {
920 dsl_dataset_rele(clone, FTAG);
921 dsl_pool_rele(dp, FTAG);
922 return (error);
923 }
924
925 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
926 ZFS_DELEG_PERM_MOUNT, cr);
927
928 dsl_dataset_name(origin, parentname);
929 if (error == 0) {
930 error = zfs_secpolicy_write_perms_ds(parentname, origin,
931 ZFS_DELEG_PERM_PROMOTE, cr);
932 }
933 dsl_dataset_rele(clone, FTAG);
934 dsl_dataset_rele(origin, FTAG);
935 }
936 dsl_pool_rele(dp, FTAG);
937 return (error);
938 }
939
940 /* ARGSUSED */
941 static int
942 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
943 {
944 int error;
945
946 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
947 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
948 return (error);
949
950 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
951 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
952 return (error);
953
954 return (zfs_secpolicy_write_perms(zc->zc_name,
955 ZFS_DELEG_PERM_CREATE, cr));
956 }
957
958 int
959 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
960 {
961 return (zfs_secpolicy_write_perms(name,
962 ZFS_DELEG_PERM_SNAPSHOT, cr));
963 }
964
965 /*
966 * Check for permission to create each snapshot in the nvlist.
967 */
968 /* ARGSUSED */
969 static int
970 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
971 {
972 nvlist_t *snaps;
973 int error = 0;
974 nvpair_t *pair;
975
976 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
977 return (SET_ERROR(EINVAL));
978 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
979 pair = nvlist_next_nvpair(snaps, pair)) {
980 char *name = nvpair_name(pair);
981 char *atp = strchr(name, '@');
982
983 if (atp == NULL) {
984 error = SET_ERROR(EINVAL);
985 break;
986 }
987 *atp = '\0';
988 error = zfs_secpolicy_snapshot_perms(name, cr);
989 *atp = '@';
990 if (error != 0)
991 break;
992 }
993 return (error);
994 }
995
996 /*
997 * Check for permission to create each snapshot in the nvlist.
998 */
999 /* ARGSUSED */
1000 static int
1001 zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1002 {
1003 int error = 0;
1004
1005 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
1006 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
1007 char *name = nvpair_name(pair);
1008 char *hashp = strchr(name, '#');
1009
1010 if (hashp == NULL) {
1011 error = SET_ERROR(EINVAL);
1012 break;
1013 }
1014 *hashp = '\0';
1015 error = zfs_secpolicy_write_perms(name,
1016 ZFS_DELEG_PERM_BOOKMARK, cr);
1017 *hashp = '#';
1018 if (error != 0)
1019 break;
1020 }
1021 return (error);
1022 }
1023
1024 /* ARGSUSED */
1025 static int
1026 zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1027 {
1028 nvpair_t *pair, *nextpair;
1029 int error = 0;
1030
1031 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1032 pair = nextpair) {
1033 char *name = nvpair_name(pair);
1034 char *hashp = strchr(name, '#');
1035 nextpair = nvlist_next_nvpair(innvl, pair);
1036
1037 if (hashp == NULL) {
1038 error = SET_ERROR(EINVAL);
1039 break;
1040 }
1041
1042 *hashp = '\0';
1043 error = zfs_secpolicy_write_perms(name,
1044 ZFS_DELEG_PERM_DESTROY, cr);
1045 *hashp = '#';
1046 if (error == ENOENT) {
1047 /*
1048 * Ignore any filesystems that don't exist (we consider
1049 * their bookmarks "already destroyed"). Remove
1050 * the name from the nvl here in case the filesystem
1051 * is created between now and when we try to destroy
1052 * the bookmark (in which case we don't want to
1053 * destroy it since we haven't checked for permission).
1054 */
1055 fnvlist_remove_nvpair(innvl, pair);
1056 error = 0;
1057 }
1058 if (error != 0)
1059 break;
1060 }
1061
1062 return (error);
1063 }
1064
1065 /* ARGSUSED */
1066 static int
1067 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1068 {
1069 /*
1070 * Even root must have a proper TSD so that we know what pool
1071 * to log to.
1072 */
1073 if (tsd_get(zfs_allow_log_key) == NULL)
1074 return (SET_ERROR(EPERM));
1075 return (0);
1076 }
1077
1078 static int
1079 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1080 {
1081 char parentname[MAXNAMELEN];
1082 int error;
1083 char *origin;
1084
1085 if ((error = zfs_get_parent(zc->zc_name, parentname,
1086 sizeof (parentname))) != 0)
1087 return (error);
1088
1089 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1090 (error = zfs_secpolicy_write_perms(origin,
1091 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1092 return (error);
1093
1094 if ((error = zfs_secpolicy_write_perms(parentname,
1095 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1096 return (error);
1097
1098 return (zfs_secpolicy_write_perms(parentname,
1099 ZFS_DELEG_PERM_MOUNT, cr));
1100 }
1101
1102 /*
1103 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1104 * SYS_CONFIG privilege, which is not available in a local zone.
1105 */
1106 /* ARGSUSED */
1107 static int
1108 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1109 {
1110 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1111 return (SET_ERROR(EPERM));
1112
1113 return (0);
1114 }
1115
1116 /*
1117 * Policy for object to name lookups.
1118 */
1119 /* ARGSUSED */
1120 static int
1121 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1122 {
1123 int error;
1124
1125 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1126 return (0);
1127
1128 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1129 return (error);
1130 }
1131
1132 /*
1133 * Policy for fault injection. Requires all privileges.
1134 */
1135 /* ARGSUSED */
1136 static int
1137 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1138 {
1139 return (secpolicy_zinject(cr));
1140 }
1141
1142 /* ARGSUSED */
1143 static int
1144 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1145 {
1146 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1147
1148 if (prop == ZPROP_INVAL) {
1149 if (!zfs_prop_user(zc->zc_value))
1150 return (SET_ERROR(EINVAL));
1151 return (zfs_secpolicy_write_perms(zc->zc_name,
1152 ZFS_DELEG_PERM_USERPROP, cr));
1153 } else {
1154 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1155 NULL, cr));
1156 }
1157 }
1158
1159 static int
1160 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1161 {
1162 int err = zfs_secpolicy_read(zc, innvl, cr);
1163 if (err)
1164 return (err);
1165
1166 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1167 return (SET_ERROR(EINVAL));
1168
1169 if (zc->zc_value[0] == 0) {
1170 /*
1171 * They are asking about a posix uid/gid. If it's
1172 * themself, allow it.
1173 */
1174 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1175 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1176 if (zc->zc_guid == crgetuid(cr))
1177 return (0);
1178 } else {
1179 if (groupmember(zc->zc_guid, cr))
1180 return (0);
1181 }
1182 }
1183
1184 return (zfs_secpolicy_write_perms(zc->zc_name,
1185 userquota_perms[zc->zc_objset_type], cr));
1186 }
1187
1188 static int
1189 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1190 {
1191 int err = zfs_secpolicy_read(zc, innvl, cr);
1192 if (err)
1193 return (err);
1194
1195 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1196 return (SET_ERROR(EINVAL));
1197
1198 return (zfs_secpolicy_write_perms(zc->zc_name,
1199 userquota_perms[zc->zc_objset_type], cr));
1200 }
1201
1202 /* ARGSUSED */
1203 static int
1204 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1205 {
1206 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1207 NULL, cr));
1208 }
1209
1210 /* ARGSUSED */
1211 static int
1212 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1213 {
1214 nvpair_t *pair;
1215 nvlist_t *holds;
1216 int error;
1217
1218 error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1219 if (error != 0)
1220 return (SET_ERROR(EINVAL));
1221
1222 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1223 pair = nvlist_next_nvpair(holds, pair)) {
1224 char fsname[MAXNAMELEN];
1225 error = dmu_fsname(nvpair_name(pair), fsname);
1226 if (error != 0)
1227 return (error);
1228 error = zfs_secpolicy_write_perms(fsname,
1229 ZFS_DELEG_PERM_HOLD, cr);
1230 if (error != 0)
1231 return (error);
1232 }
1233 return (0);
1234 }
1235
1236 /* ARGSUSED */
1237 static int
1238 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1239 {
1240 nvpair_t *pair;
1241 int error;
1242
1243 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1244 pair = nvlist_next_nvpair(innvl, pair)) {
1245 char fsname[MAXNAMELEN];
1246 error = dmu_fsname(nvpair_name(pair), fsname);
1247 if (error != 0)
1248 return (error);
1249 error = zfs_secpolicy_write_perms(fsname,
1250 ZFS_DELEG_PERM_RELEASE, cr);
1251 if (error != 0)
1252 return (error);
1253 }
1254 return (0);
1255 }
1256
1257 /*
1258 * Policy for allowing temporary snapshots to be taken or released
1259 */
1260 static int
1261 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1262 {
1263 /*
1264 * A temporary snapshot is the same as a snapshot,
1265 * hold, destroy and release all rolled into one.
1266 * Delegated diff alone is sufficient that we allow this.
1267 */
1268 int error;
1269
1270 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1271 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1272 return (0);
1273
1274 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1275 if (error == 0)
1276 error = zfs_secpolicy_hold(zc, innvl, cr);
1277 if (error == 0)
1278 error = zfs_secpolicy_release(zc, innvl, cr);
1279 if (error == 0)
1280 error = zfs_secpolicy_destroy(zc, innvl, cr);
1281 return (error);
1282 }
1283
1284 /*
1285 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1286 */
1287 static int
1288 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1289 {
1290 char *packed;
1291 int error;
1292 nvlist_t *list = NULL;
1293
1294 /*
1295 * Read in and unpack the user-supplied nvlist.
1296 */
1297 if (size == 0)
1298 return (SET_ERROR(EINVAL));
1299
1300 packed = kmem_alloc(size, KM_SLEEP);
1301
1302 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1303 iflag)) != 0) {
1304 kmem_free(packed, size);
1305 return (error);
1306 }
1307
1308 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1309 kmem_free(packed, size);
1310 return (error);
1311 }
1312
1313 kmem_free(packed, size);
1314
1315 *nvp = list;
1316 return (0);
1317 }
1318
1319 /*
1320 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1321 * Entries will be removed from the end of the nvlist, and one int32 entry
1322 * named "N_MORE_ERRORS" will be added indicating how many entries were
1323 * removed.
1324 */
1325 static int
1326 nvlist_smush(nvlist_t *errors, size_t max)
1327 {
1328 size_t size;
1329
1330 size = fnvlist_size(errors);
1331
1332 if (size > max) {
1333 nvpair_t *more_errors;
1334 int n = 0;
1335
1336 if (max < 1024)
1337 return (SET_ERROR(ENOMEM));
1338
1339 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1340 more_errors = nvlist_prev_nvpair(errors, NULL);
1341
1342 do {
1343 nvpair_t *pair = nvlist_prev_nvpair(errors,
1344 more_errors);
1345 fnvlist_remove_nvpair(errors, pair);
1346 n++;
1347 size = fnvlist_size(errors);
1348 } while (size > max);
1349
1350 fnvlist_remove_nvpair(errors, more_errors);
1351 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1352 ASSERT3U(fnvlist_size(errors), <=, max);
1353 }
1354
1355 return (0);
1356 }
1357
1358 static int
1359 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1360 {
1361 char *packed = NULL;
1362 int error = 0;
1363 size_t size;
1364
1365 size = fnvlist_size(nvl);
1366
1367 if (size > zc->zc_nvlist_dst_size) {
1368 error = SET_ERROR(ENOMEM);
1369 } else {
1370 packed = fnvlist_pack(nvl, &size);
1371 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1372 size, zc->zc_iflags) != 0)
1373 error = SET_ERROR(EFAULT);
1374 fnvlist_pack_free(packed, size);
1375 }
1376
1377 zc->zc_nvlist_dst_size = size;
1378 zc->zc_nvlist_dst_filled = B_TRUE;
1379 return (error);
1380 }
1381
1382 static int
1383 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1384 {
1385 objset_t *os;
1386 int error;
1387
1388 error = dmu_objset_hold(dsname, FTAG, &os);
1389 if (error != 0)
1390 return (error);
1391 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1392 dmu_objset_rele(os, FTAG);
1393 return (SET_ERROR(EINVAL));
1394 }
1395
1396 mutex_enter(&os->os_user_ptr_lock);
1397 *zfvp = dmu_objset_get_user(os);
1398 if (*zfvp) {
1399 VFS_HOLD((*zfvp)->z_vfs);
1400 } else {
1401 error = SET_ERROR(ESRCH);
1402 }
1403 mutex_exit(&os->os_user_ptr_lock);
1404 dmu_objset_rele(os, FTAG);
1405 return (error);
1406 }
1407
1408 /*
1409 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1410 * case its z_vfs will be NULL, and it will be opened as the owner.
1411 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1412 * which prevents all vnode ops from running.
1413 */
1414 static int
1415 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1416 {
1417 int error = 0;
1418
1419 if (getzfsvfs(name, zfvp) != 0)
1420 error = zfsvfs_create(name, zfvp);
1421 if (error == 0) {
1422 rrw_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1423 RW_READER, tag);
1424 if ((*zfvp)->z_unmounted) {
1425 /*
1426 * XXX we could probably try again, since the unmounting
1427 * thread should be just about to disassociate the
1428 * objset from the zfsvfs.
1429 */
1430 rrw_exit(&(*zfvp)->z_teardown_lock, tag);
1431 return (SET_ERROR(EBUSY));
1432 }
1433 }
1434 return (error);
1435 }
1436
1437 static void
1438 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1439 {
1440 rrw_exit(&zfsvfs->z_teardown_lock, tag);
1441
1442 if (zfsvfs->z_vfs) {
1443 VFS_RELE(zfsvfs->z_vfs);
1444 } else {
1445 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1446 zfsvfs_free(zfsvfs);
1447 }
1448 }
1449
1450 static int
1451 zfs_ioc_pool_create(zfs_cmd_t *zc)
1452 {
1453 int error;
1454 nvlist_t *config, *props = NULL;
1455 nvlist_t *rootprops = NULL;
1456 nvlist_t *zplprops = NULL;
1457
1458 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1459 zc->zc_iflags, &config))
1460 return (error);
1461
1462 if (zc->zc_nvlist_src_size != 0 && (error =
1463 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1464 zc->zc_iflags, &props))) {
1465 nvlist_free(config);
1466 return (error);
1467 }
1468
1469 if (props) {
1470 nvlist_t *nvl = NULL;
1471 uint64_t version = SPA_VERSION;
1472
1473 (void) nvlist_lookup_uint64(props,
1474 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1475 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1476 error = SET_ERROR(EINVAL);
1477 goto pool_props_bad;
1478 }
1479 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1480 if (nvl) {
1481 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1482 if (error != 0) {
1483 nvlist_free(config);
1484 nvlist_free(props);
1485 return (error);
1486 }
1487 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1488 }
1489 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1490 error = zfs_fill_zplprops_root(version, rootprops,
1491 zplprops, NULL);
1492 if (error != 0)
1493 goto pool_props_bad;
1494 }
1495
1496 error = spa_create(zc->zc_name, config, props, zplprops);
1497
1498 /*
1499 * Set the remaining root properties
1500 */
1501 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1502 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1503 (void) spa_destroy(zc->zc_name);
1504
1505 pool_props_bad:
1506 nvlist_free(rootprops);
1507 nvlist_free(zplprops);
1508 nvlist_free(config);
1509 nvlist_free(props);
1510
1511 return (error);
1512 }
1513
1514 static int
1515 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1516 {
1517 int error;
1518 zfs_log_history(zc);
1519 error = spa_destroy(zc->zc_name);
1520 if (error == 0)
1521 zvol_remove_minors(zc->zc_name);
1522 return (error);
1523 }
1524
1525 static int
1526 zfs_ioc_pool_import(zfs_cmd_t *zc)
1527 {
1528 nvlist_t *config, *props = NULL;
1529 uint64_t guid;
1530 int error;
1531
1532 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1533 zc->zc_iflags, &config)) != 0)
1534 return (error);
1535
1536 if (zc->zc_nvlist_src_size != 0 && (error =
1537 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1538 zc->zc_iflags, &props))) {
1539 nvlist_free(config);
1540 return (error);
1541 }
1542
1543 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1544 guid != zc->zc_guid)
1545 error = SET_ERROR(EINVAL);
1546 else
1547 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1548
1549 if (zc->zc_nvlist_dst != 0) {
1550 int err;
1551
1552 if ((err = put_nvlist(zc, config)) != 0)
1553 error = err;
1554 }
1555
1556 nvlist_free(config);
1557
1558 if (props)
1559 nvlist_free(props);
1560
1561 return (error);
1562 }
1563
1564 static int
1565 zfs_ioc_pool_export(zfs_cmd_t *zc)
1566 {
1567 int error;
1568 boolean_t force = (boolean_t)zc->zc_cookie;
1569 boolean_t hardforce = (boolean_t)zc->zc_guid;
1570
1571 zfs_log_history(zc);
1572 error = spa_export(zc->zc_name, NULL, force, hardforce);
1573 if (error == 0)
1574 zvol_remove_minors(zc->zc_name);
1575 return (error);
1576 }
1577
1578 static int
1579 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1580 {
1581 nvlist_t *configs;
1582 int error;
1583
1584 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1585 return (SET_ERROR(EEXIST));
1586
1587 error = put_nvlist(zc, configs);
1588
1589 nvlist_free(configs);
1590
1591 return (error);
1592 }
1593
1594 /*
1595 * inputs:
1596 * zc_name name of the pool
1597 *
1598 * outputs:
1599 * zc_cookie real errno
1600 * zc_nvlist_dst config nvlist
1601 * zc_nvlist_dst_size size of config nvlist
1602 */
1603 static int
1604 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1605 {
1606 nvlist_t *config;
1607 int error;
1608 int ret = 0;
1609
1610 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1611 sizeof (zc->zc_value));
1612
1613 if (config != NULL) {
1614 ret = put_nvlist(zc, config);
1615 nvlist_free(config);
1616
1617 /*
1618 * The config may be present even if 'error' is non-zero.
1619 * In this case we return success, and preserve the real errno
1620 * in 'zc_cookie'.
1621 */
1622 zc->zc_cookie = error;
1623 } else {
1624 ret = error;
1625 }
1626
1627 return (ret);
1628 }
1629
1630 /*
1631 * Try to import the given pool, returning pool stats as appropriate so that
1632 * user land knows which devices are available and overall pool health.
1633 */
1634 static int
1635 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1636 {
1637 nvlist_t *tryconfig, *config;
1638 int error;
1639
1640 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1641 zc->zc_iflags, &tryconfig)) != 0)
1642 return (error);
1643
1644 config = spa_tryimport(tryconfig);
1645
1646 nvlist_free(tryconfig);
1647
1648 if (config == NULL)
1649 return (SET_ERROR(EINVAL));
1650
1651 error = put_nvlist(zc, config);
1652 nvlist_free(config);
1653
1654 return (error);
1655 }
1656
1657 /*
1658 * inputs:
1659 * zc_name name of the pool
1660 * zc_cookie scan func (pool_scan_func_t)
1661 */
1662 static int
1663 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1664 {
1665 spa_t *spa;
1666 int error;
1667
1668 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1669 return (error);
1670
1671 if (zc->zc_cookie == POOL_SCAN_NONE)
1672 error = spa_scan_stop(spa);
1673 else
1674 error = spa_scan(spa, zc->zc_cookie);
1675
1676 spa_close(spa, FTAG);
1677
1678 return (error);
1679 }
1680
1681 static int
1682 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1683 {
1684 spa_t *spa;
1685 int error;
1686
1687 error = spa_open(zc->zc_name, &spa, FTAG);
1688 if (error == 0) {
1689 spa_freeze(spa);
1690 spa_close(spa, FTAG);
1691 }
1692 return (error);
1693 }
1694
1695 static int
1696 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1697 {
1698 spa_t *spa;
1699 int error;
1700
1701 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1702 return (error);
1703
1704 if (zc->zc_cookie < spa_version(spa) ||
1705 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1706 spa_close(spa, FTAG);
1707 return (SET_ERROR(EINVAL));
1708 }
1709
1710 spa_upgrade(spa, zc->zc_cookie);
1711 spa_close(spa, FTAG);
1712
1713 return (error);
1714 }
1715
1716 static int
1717 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1718 {
1719 spa_t *spa;
1720 char *hist_buf;
1721 uint64_t size;
1722 int error;
1723
1724 if ((size = zc->zc_history_len) == 0)
1725 return (SET_ERROR(EINVAL));
1726
1727 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1728 return (error);
1729
1730 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1731 spa_close(spa, FTAG);
1732 return (SET_ERROR(ENOTSUP));
1733 }
1734
1735 hist_buf = kmem_alloc(size, KM_SLEEP);
1736 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1737 &zc->zc_history_len, hist_buf)) == 0) {
1738 error = ddi_copyout(hist_buf,
1739 (void *)(uintptr_t)zc->zc_history,
1740 zc->zc_history_len, zc->zc_iflags);
1741 }
1742
1743 spa_close(spa, FTAG);
1744 kmem_free(hist_buf, size);
1745 return (error);
1746 }
1747
1748 static int
1749 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1750 {
1751 spa_t *spa;
1752 int error;
1753
1754 error = spa_open(zc->zc_name, &spa, FTAG);
1755 if (error == 0) {
1756 error = spa_change_guid(spa);
1757 spa_close(spa, FTAG);
1758 }
1759 return (error);
1760 }
1761
1762 static int
1763 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1764 {
1765 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1766 }
1767
1768 /*
1769 * inputs:
1770 * zc_name name of filesystem
1771 * zc_obj object to find
1772 *
1773 * outputs:
1774 * zc_value name of object
1775 */
1776 static int
1777 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1778 {
1779 objset_t *os;
1780 int error;
1781
1782 /* XXX reading from objset not owned */
1783 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1784 return (error);
1785 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1786 dmu_objset_rele(os, FTAG);
1787 return (SET_ERROR(EINVAL));
1788 }
1789 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1790 sizeof (zc->zc_value));
1791 dmu_objset_rele(os, FTAG);
1792
1793 return (error);
1794 }
1795
1796 /*
1797 * inputs:
1798 * zc_name name of filesystem
1799 * zc_obj object to find
1800 *
1801 * outputs:
1802 * zc_stat stats on object
1803 * zc_value path to object
1804 */
1805 static int
1806 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1807 {
1808 objset_t *os;
1809 int error;
1810
1811 /* XXX reading from objset not owned */
1812 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1813 return (error);
1814 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1815 dmu_objset_rele(os, FTAG);
1816 return (SET_ERROR(EINVAL));
1817 }
1818 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1819 sizeof (zc->zc_value));
1820 dmu_objset_rele(os, FTAG);
1821
1822 return (error);
1823 }
1824
1825 static int
1826 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1827 {
1828 spa_t *spa;
1829 int error;
1830 nvlist_t *config, **l2cache, **spares;
1831 uint_t nl2cache = 0, nspares = 0;
1832
1833 error = spa_open(zc->zc_name, &spa, FTAG);
1834 if (error != 0)
1835 return (error);
1836
1837 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1838 zc->zc_iflags, &config);
1839 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1840 &l2cache, &nl2cache);
1841
1842 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1843 &spares, &nspares);
1844
1845 /*
1846 * A root pool with concatenated devices is not supported.
1847 * Thus, can not add a device to a root pool.
1848 *
1849 * Intent log device can not be added to a rootpool because
1850 * during mountroot, zil is replayed, a seperated log device
1851 * can not be accessed during the mountroot time.
1852 *
1853 * l2cache and spare devices are ok to be added to a rootpool.
1854 */
1855 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1856 nvlist_free(config);
1857 spa_close(spa, FTAG);
1858 return (SET_ERROR(EDOM));
1859 }
1860
1861 if (error == 0) {
1862 error = spa_vdev_add(spa, config);
1863 nvlist_free(config);
1864 }
1865 spa_close(spa, FTAG);
1866 return (error);
1867 }
1868
1869 /*
1870 * inputs:
1871 * zc_name name of the pool
1872 * zc_nvlist_conf nvlist of devices to remove
1873 * zc_cookie to stop the remove?
1874 */
1875 static int
1876 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1877 {
1878 spa_t *spa;
1879 int error;
1880
1881 error = spa_open(zc->zc_name, &spa, FTAG);
1882 if (error != 0)
1883 return (error);
1884 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1885 spa_close(spa, FTAG);
1886 return (error);
1887 }
1888
1889 static int
1890 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1891 {
1892 spa_t *spa;
1893 int error;
1894 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1895
1896 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1897 return (error);
1898 switch (zc->zc_cookie) {
1899 case VDEV_STATE_ONLINE:
1900 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1901 break;
1902
1903 case VDEV_STATE_OFFLINE:
1904 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1905 break;
1906
1907 case VDEV_STATE_FAULTED:
1908 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1909 zc->zc_obj != VDEV_AUX_EXTERNAL)
1910 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1911
1912 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1913 break;
1914
1915 case VDEV_STATE_DEGRADED:
1916 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1917 zc->zc_obj != VDEV_AUX_EXTERNAL)
1918 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1919
1920 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1921 break;
1922
1923 default:
1924 error = SET_ERROR(EINVAL);
1925 }
1926 zc->zc_cookie = newstate;
1927 spa_close(spa, FTAG);
1928 return (error);
1929 }
1930
1931 static int
1932 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1933 {
1934 spa_t *spa;
1935 int replacing = zc->zc_cookie;
1936 nvlist_t *config;
1937 int error;
1938
1939 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1940 return (error);
1941
1942 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1943 zc->zc_iflags, &config)) == 0) {
1944 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1945 nvlist_free(config);
1946 }
1947
1948 spa_close(spa, FTAG);
1949 return (error);
1950 }
1951
1952 static int
1953 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1954 {
1955 spa_t *spa;
1956 int error;
1957
1958 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1959 return (error);
1960
1961 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1962
1963 spa_close(spa, FTAG);
1964 return (error);
1965 }
1966
1967 static int
1968 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1969 {
1970 spa_t *spa;
1971 nvlist_t *config, *props = NULL;
1972 int error;
1973 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1974
1975 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1976 return (error);
1977
1978 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1979 zc->zc_iflags, &config)) {
1980 spa_close(spa, FTAG);
1981 return (error);
1982 }
1983
1984 if (zc->zc_nvlist_src_size != 0 && (error =
1985 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1986 zc->zc_iflags, &props))) {
1987 spa_close(spa, FTAG);
1988 nvlist_free(config);
1989 return (error);
1990 }
1991
1992 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1993
1994 spa_close(spa, FTAG);
1995
1996 nvlist_free(config);
1997 nvlist_free(props);
1998
1999 return (error);
2000 }
2001
2002 static int
2003 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
2004 {
2005 spa_t *spa;
2006 char *path = zc->zc_value;
2007 uint64_t guid = zc->zc_guid;
2008 int error;
2009
2010 error = spa_open(zc->zc_name, &spa, FTAG);
2011 if (error != 0)
2012 return (error);
2013
2014 error = spa_vdev_setpath(spa, guid, path);
2015 spa_close(spa, FTAG);
2016 return (error);
2017 }
2018
2019 static int
2020 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
2021 {
2022 spa_t *spa;
2023 char *fru = zc->zc_value;
2024 uint64_t guid = zc->zc_guid;
2025 int error;
2026
2027 error = spa_open(zc->zc_name, &spa, FTAG);
2028 if (error != 0)
2029 return (error);
2030
2031 error = spa_vdev_setfru(spa, guid, fru);
2032 spa_close(spa, FTAG);
2033 return (error);
2034 }
2035
2036 static int
2037 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
2038 {
2039 int error = 0;
2040 nvlist_t *nv;
2041
2042 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2043
2044 if (zc->zc_nvlist_dst != 0 &&
2045 (error = dsl_prop_get_all(os, &nv)) == 0) {
2046 dmu_objset_stats(os, nv);
2047 /*
2048 * NB: zvol_get_stats() will read the objset contents,
2049 * which we aren't supposed to do with a
2050 * DS_MODE_USER hold, because it could be
2051 * inconsistent. So this is a bit of a workaround...
2052 * XXX reading with out owning
2053 */
2054 if (!zc->zc_objset_stats.dds_inconsistent &&
2055 dmu_objset_type(os) == DMU_OST_ZVOL) {
2056 error = zvol_get_stats(os, nv);
2057 if (error == EIO)
2058 return (error);
2059 VERIFY0(error);
2060 }
2061 error = put_nvlist(zc, nv);
2062 nvlist_free(nv);
2063 }
2064
2065 return (error);
2066 }
2067
2068 /*
2069 * inputs:
2070 * zc_name name of filesystem
2071 * zc_nvlist_dst_size size of buffer for property nvlist
2072 *
2073 * outputs:
2074 * zc_objset_stats stats
2075 * zc_nvlist_dst property nvlist
2076 * zc_nvlist_dst_size size of property nvlist
2077 */
2078 static int
2079 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2080 {
2081 objset_t *os;
2082 int error;
2083
2084 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2085 if (error == 0) {
2086 error = zfs_ioc_objset_stats_impl(zc, os);
2087 dmu_objset_rele(os, FTAG);
2088 }
2089
2090 return (error);
2091 }
2092
2093 /*
2094 * inputs:
2095 * zc_name name of filesystem
2096 * zc_nvlist_dst_size size of buffer for property nvlist
2097 *
2098 * outputs:
2099 * zc_nvlist_dst received property nvlist
2100 * zc_nvlist_dst_size size of received property nvlist
2101 *
2102 * Gets received properties (distinct from local properties on or after
2103 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2104 * local property values.
2105 */
2106 static int
2107 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2108 {
2109 int error = 0;
2110 nvlist_t *nv;
2111
2112 /*
2113 * Without this check, we would return local property values if the
2114 * caller has not already received properties on or after
2115 * SPA_VERSION_RECVD_PROPS.
2116 */
2117 if (!dsl_prop_get_hasrecvd(zc->zc_name))
2118 return (SET_ERROR(ENOTSUP));
2119
2120 if (zc->zc_nvlist_dst != 0 &&
2121 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2122 error = put_nvlist(zc, nv);
2123 nvlist_free(nv);
2124 }
2125
2126 return (error);
2127 }
2128
2129 static int
2130 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2131 {
2132 uint64_t value;
2133 int error;
2134
2135 /*
2136 * zfs_get_zplprop() will either find a value or give us
2137 * the default value (if there is one).
2138 */
2139 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2140 return (error);
2141 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2142 return (0);
2143 }
2144
2145 /*
2146 * inputs:
2147 * zc_name name of filesystem
2148 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2149 *
2150 * outputs:
2151 * zc_nvlist_dst zpl property nvlist
2152 * zc_nvlist_dst_size size of zpl property nvlist
2153 */
2154 static int
2155 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2156 {
2157 objset_t *os;
2158 int err;
2159
2160 /* XXX reading without owning */
2161 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2162 return (err);
2163
2164 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2165
2166 /*
2167 * NB: nvl_add_zplprop() will read the objset contents,
2168 * which we aren't supposed to do with a DS_MODE_USER
2169 * hold, because it could be inconsistent.
2170 */
2171 if (zc->zc_nvlist_dst != NULL &&
2172 !zc->zc_objset_stats.dds_inconsistent &&
2173 dmu_objset_type(os) == DMU_OST_ZFS) {
2174 nvlist_t *nv;
2175
2176 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2177 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2178 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2179 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2180 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2181 err = put_nvlist(zc, nv);
2182 nvlist_free(nv);
2183 } else {
2184 err = SET_ERROR(ENOENT);
2185 }
2186 dmu_objset_rele(os, FTAG);
2187 return (err);
2188 }
2189
2190 static boolean_t
2191 dataset_name_hidden(const char *name)
2192 {
2193 /*
2194 * Skip over datasets that are not visible in this zone,
2195 * internal datasets (which have a $ in their name), and
2196 * temporary datasets (which have a % in their name).
2197 */
2198 if (strchr(name, '$') != NULL)
2199 return (B_TRUE);
2200 if (strchr(name, '%') != NULL)
2201 return (B_TRUE);
2202 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2203 return (B_TRUE);
2204 return (B_FALSE);
2205 }
2206
2207 /*
2208 * inputs:
2209 * zc_name name of filesystem
2210 * zc_cookie zap cursor
2211 * zc_nvlist_dst_size size of buffer for property nvlist
2212 *
2213 * outputs:
2214 * zc_name name of next filesystem
2215 * zc_cookie zap cursor
2216 * zc_objset_stats stats
2217 * zc_nvlist_dst property nvlist
2218 * zc_nvlist_dst_size size of property nvlist
2219 */
2220 static int
2221 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2222 {
2223 objset_t *os;
2224 int error;
2225 char *p;
2226 size_t orig_len = strlen(zc->zc_name);
2227
2228 top:
2229 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2230 if (error == ENOENT)
2231 error = SET_ERROR(ESRCH);
2232 return (error);
2233 }
2234
2235 p = strrchr(zc->zc_name, '/');
2236 if (p == NULL || p[1] != '\0')
2237 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2238 p = zc->zc_name + strlen(zc->zc_name);
2239
2240 do {
2241 error = dmu_dir_list_next(os,
2242 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2243 NULL, &zc->zc_cookie);
2244 if (error == ENOENT)
2245 error = SET_ERROR(ESRCH);
2246 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2247 dmu_objset_rele(os, FTAG);
2248
2249 /*
2250 * If it's an internal dataset (ie. with a '$' in its name),
2251 * don't try to get stats for it, otherwise we'll return ENOENT.
2252 */
2253 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2254 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2255 if (error == ENOENT) {
2256 /* We lost a race with destroy, get the next one. */
2257 zc->zc_name[orig_len] = '\0';
2258 goto top;
2259 }
2260 }
2261 return (error);
2262 }
2263
2264 /*
2265 * inputs:
2266 * zc_name name of filesystem
2267 * zc_cookie zap cursor
2268 * zc_nvlist_dst_size size of buffer for property nvlist
2269 *
2270 * outputs:
2271 * zc_name name of next snapshot
2272 * zc_objset_stats stats
2273 * zc_nvlist_dst property nvlist
2274 * zc_nvlist_dst_size size of property nvlist
2275 */
2276 static int
2277 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2278 {
2279 objset_t *os;
2280 int error;
2281
2282 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2283 if (error != 0) {
2284 return (error == ENOENT ? ESRCH : error);
2285 }
2286
2287 /*
2288 * A dataset name of maximum length cannot have any snapshots,
2289 * so exit immediately.
2290 */
2291 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2292 dmu_objset_rele(os, FTAG);
2293 return (SET_ERROR(ESRCH));
2294 }
2295
2296 error = dmu_snapshot_list_next(os,
2297 sizeof (zc->zc_name) - strlen(zc->zc_name),
2298 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2299 NULL);
2300
2301 if (error == 0) {
2302 dsl_dataset_t *ds;
2303 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2304
2305 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2306 if (error == 0) {
2307 objset_t *ossnap;
2308
2309 error = dmu_objset_from_ds(ds, &ossnap);
2310 if (error == 0)
2311 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2312 dsl_dataset_rele(ds, FTAG);
2313 }
2314 } else if (error == ENOENT) {
2315 error = SET_ERROR(ESRCH);
2316 }
2317
2318 dmu_objset_rele(os, FTAG);
2319 /* if we failed, undo the @ that we tacked on to zc_name */
2320 if (error != 0)
2321 *strchr(zc->zc_name, '@') = '\0';
2322 return (error);
2323 }
2324
2325 static int
2326 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2327 {
2328 const char *propname = nvpair_name(pair);
2329 uint64_t *valary;
2330 unsigned int vallen;
2331 const char *domain;
2332 char *dash;
2333 zfs_userquota_prop_t type;
2334 uint64_t rid;
2335 uint64_t quota;
2336 zfsvfs_t *zfsvfs;
2337 int err;
2338
2339 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2340 nvlist_t *attrs;
2341 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2342 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2343 &pair) != 0)
2344 return (SET_ERROR(EINVAL));
2345 }
2346
2347 /*
2348 * A correctly constructed propname is encoded as
2349 * userquota@<rid>-<domain>.
2350 */
2351 if ((dash = strchr(propname, '-')) == NULL ||
2352 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2353 vallen != 3)
2354 return (SET_ERROR(EINVAL));
2355
2356 domain = dash + 1;
2357 type = valary[0];
2358 rid = valary[1];
2359 quota = valary[2];
2360
2361 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2362 if (err == 0) {
2363 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2364 zfsvfs_rele(zfsvfs, FTAG);
2365 }
2366
2367 return (err);
2368 }
2369
2370 /*
2371 * If the named property is one that has a special function to set its value,
2372 * return 0 on success and a positive error code on failure; otherwise if it is
2373 * not one of the special properties handled by this function, return -1.
2374 *
2375 * XXX: It would be better for callers of the property interface if we handled
2376 * these special cases in dsl_prop.c (in the dsl layer).
2377 */
2378 static int
2379 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2380 nvpair_t *pair)
2381 {
2382 const char *propname = nvpair_name(pair);
2383 zfs_prop_t prop = zfs_name_to_prop(propname);
2384 uint64_t intval;
2385 int err;
2386
2387 if (prop == ZPROP_INVAL) {
2388 if (zfs_prop_userquota(propname))
2389 return (zfs_prop_set_userquota(dsname, pair));
2390 return (-1);
2391 }
2392
2393 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2394 nvlist_t *attrs;
2395 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2396 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2397 &pair) == 0);
2398 }
2399
2400 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2401 return (-1);
2402
2403 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2404
2405 switch (prop) {
2406 case ZFS_PROP_QUOTA:
2407 err = dsl_dir_set_quota(dsname, source, intval);
2408 break;
2409 case ZFS_PROP_REFQUOTA:
2410 err = dsl_dataset_set_refquota(dsname, source, intval);
2411 break;
2412 case ZFS_PROP_FILESYSTEM_LIMIT:
2413 case ZFS_PROP_SNAPSHOT_LIMIT:
2414 if (intval == UINT64_MAX) {
2415 /* clearing the limit, just do it */
2416 err = 0;
2417 } else {
2418 err = dsl_dir_activate_fs_ss_limit(dsname);
2419 }
2420 /*
2421 * Set err to -1 to force the zfs_set_prop_nvlist code down the
2422 * default path to set the value in the nvlist.
2423 */
2424 if (err == 0)
2425 err = -1;
2426 break;
2427 case ZFS_PROP_RESERVATION:
2428 err = dsl_dir_set_reservation(dsname, source, intval);
2429 break;
2430 case ZFS_PROP_REFRESERVATION:
2431 err = dsl_dataset_set_refreservation(dsname, source, intval);
2432 break;
2433 case ZFS_PROP_VOLSIZE:
2434 err = zvol_set_volsize(dsname, intval);
2435 break;
2436 case ZFS_PROP_VERSION:
2437 {
2438 zfsvfs_t *zfsvfs;
2439
2440 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2441 break;
2442
2443 err = zfs_set_version(zfsvfs, intval);
2444 zfsvfs_rele(zfsvfs, FTAG);
2445
2446 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2447 zfs_cmd_t *zc;
2448
2449 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2450 (void) strcpy(zc->zc_name, dsname);
2451 (void) zfs_ioc_userspace_upgrade(zc);
2452 kmem_free(zc, sizeof (zfs_cmd_t));
2453 }
2454 break;
2455 }
2456 case ZFS_PROP_COMPRESSION:
2457 {
2458 if (intval == ZIO_COMPRESS_LZ4) {
2459 spa_t *spa;
2460
2461 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
2462 return (err);
2463
2464 /*
2465 * Setting the LZ4 compression algorithm activates
2466 * the feature.
2467 */
2468 if (!spa_feature_is_active(spa,
2469 SPA_FEATURE_LZ4_COMPRESS)) {
2470 if ((err = zfs_prop_activate_feature(spa,
2471 SPA_FEATURE_LZ4_COMPRESS)) != 0) {
2472 spa_close(spa, FTAG);
2473 return (err);
2474 }
2475 }
2476
2477 spa_close(spa, FTAG);
2478 }
2479 /*
2480 * We still want the default set action to be performed in the
2481 * caller, we only performed zfeature settings here.
2482 */
2483 err = -1;
2484 break;
2485 }
2486
2487 default:
2488 err = -1;
2489 }
2490
2491 return (err);
2492 }
2493
2494 /*
2495 * This function is best effort. If it fails to set any of the given properties,
2496 * it continues to set as many as it can and returns the last error
2497 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2498 * with the list of names of all the properties that failed along with the
2499 * corresponding error numbers.
2500 *
2501 * If every property is set successfully, zero is returned and errlist is not
2502 * modified.
2503 */
2504 int
2505 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2506 nvlist_t *errlist)
2507 {
2508 nvpair_t *pair;
2509 nvpair_t *propval;
2510 int rv = 0;
2511 uint64_t intval;
2512 char *strval;
2513 nvlist_t *genericnvl = fnvlist_alloc();
2514 nvlist_t *retrynvl = fnvlist_alloc();
2515
2516 retry:
2517 pair = NULL;
2518 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2519 const char *propname = nvpair_name(pair);
2520 zfs_prop_t prop = zfs_name_to_prop(propname);
2521 int err = 0;
2522
2523 /* decode the property value */
2524 propval = pair;
2525 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2526 nvlist_t *attrs;
2527 attrs = fnvpair_value_nvlist(pair);
2528 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2529 &propval) != 0)
2530 err = SET_ERROR(EINVAL);
2531 }
2532
2533 /* Validate value type */
2534 if (err == 0 && prop == ZPROP_INVAL) {
2535 if (zfs_prop_user(propname)) {
2536 if (nvpair_type(propval) != DATA_TYPE_STRING)
2537 err = SET_ERROR(EINVAL);
2538 } else if (zfs_prop_userquota(propname)) {
2539 if (nvpair_type(propval) !=
2540 DATA_TYPE_UINT64_ARRAY)
2541 err = SET_ERROR(EINVAL);
2542 } else {
2543 err = SET_ERROR(EINVAL);
2544 }
2545 } else if (err == 0) {
2546 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2547 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2548 err = SET_ERROR(EINVAL);
2549 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2550 const char *unused;
2551
2552 intval = fnvpair_value_uint64(propval);
2553
2554 switch (zfs_prop_get_type(prop)) {
2555 case PROP_TYPE_NUMBER:
2556 break;
2557 case PROP_TYPE_STRING:
2558 err = SET_ERROR(EINVAL);
2559 break;
2560 case PROP_TYPE_INDEX:
2561 if (zfs_prop_index_to_string(prop,
2562 intval, &unused) != 0)
2563 err = SET_ERROR(EINVAL);
2564 break;
2565 default:
2566 cmn_err(CE_PANIC,
2567 "unknown property type");
2568 }
2569 } else {
2570 err = SET_ERROR(EINVAL);
2571 }
2572 }
2573
2574 /* Validate permissions */
2575 if (err == 0)
2576 err = zfs_check_settable(dsname, pair, CRED());
2577
2578 if (err == 0) {
2579 err = zfs_prop_set_special(dsname, source, pair);
2580 if (err == -1) {
2581 /*
2582 * For better performance we build up a list of
2583 * properties to set in a single transaction.
2584 */
2585 err = nvlist_add_nvpair(genericnvl, pair);
2586 } else if (err != 0 && nvl != retrynvl) {
2587 /*
2588 * This may be a spurious error caused by
2589 * receiving quota and reservation out of order.
2590 * Try again in a second pass.
2591 */
2592 err = nvlist_add_nvpair(retrynvl, pair);
2593 }
2594 }
2595
2596 if (err != 0) {
2597 if (errlist != NULL)
2598 fnvlist_add_int32(errlist, propname, err);
2599 rv = err;
2600 }
2601 }
2602
2603 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2604 nvl = retrynvl;
2605 goto retry;
2606 }
2607
2608 if (!nvlist_empty(genericnvl) &&
2609 dsl_props_set(dsname, source, genericnvl) != 0) {
2610 /*
2611 * If this fails, we still want to set as many properties as we
2612 * can, so try setting them individually.
2613 */
2614 pair = NULL;
2615 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2616 const char *propname = nvpair_name(pair);
2617 int err = 0;
2618
2619 propval = pair;
2620 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2621 nvlist_t *attrs;
2622 attrs = fnvpair_value_nvlist(pair);
2623 propval = fnvlist_lookup_nvpair(attrs,
2624 ZPROP_VALUE);
2625 }
2626
2627 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2628 strval = fnvpair_value_string(propval);
2629 err = dsl_prop_set_string(dsname, propname,
2630 source, strval);
2631 } else {
2632 intval = fnvpair_value_uint64(propval);
2633 err = dsl_prop_set_int(dsname, propname, source,
2634 intval);
2635 }
2636
2637 if (err != 0) {
2638 if (errlist != NULL) {
2639 fnvlist_add_int32(errlist, propname,
2640 err);
2641 }
2642 rv = err;
2643 }
2644 }
2645 }
2646 nvlist_free(genericnvl);
2647 nvlist_free(retrynvl);
2648
2649 return (rv);
2650 }
2651
2652 /*
2653 * Check that all the properties are valid user properties.
2654 */
2655 static int
2656 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2657 {
2658 nvpair_t *pair = NULL;
2659 int error = 0;
2660
2661 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2662 const char *propname = nvpair_name(pair);
2663
2664 if (!zfs_prop_user(propname) ||
2665 nvpair_type(pair) != DATA_TYPE_STRING)
2666 return (SET_ERROR(EINVAL));
2667
2668 if (error = zfs_secpolicy_write_perms(fsname,
2669 ZFS_DELEG_PERM_USERPROP, CRED()))
2670 return (error);
2671
2672 if (strlen(propname) >= ZAP_MAXNAMELEN)
2673 return (SET_ERROR(ENAMETOOLONG));
2674
2675 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN)
2676 return (E2BIG);
2677 }
2678 return (0);
2679 }
2680
2681 static void
2682 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2683 {
2684 nvpair_t *pair;
2685
2686 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2687
2688 pair = NULL;
2689 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2690 if (nvlist_exists(skipped, nvpair_name(pair)))
2691 continue;
2692
2693 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2694 }
2695 }
2696
2697 static int
2698 clear_received_props(const char *dsname, nvlist_t *props,
2699 nvlist_t *skipped)
2700 {
2701 int err = 0;
2702 nvlist_t *cleared_props = NULL;
2703 props_skip(props, skipped, &cleared_props);
2704 if (!nvlist_empty(cleared_props)) {
2705 /*
2706 * Acts on local properties until the dataset has received
2707 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2708 */
2709 zprop_source_t flags = (ZPROP_SRC_NONE |
2710 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2711 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2712 }
2713 nvlist_free(cleared_props);
2714 return (err);
2715 }
2716
2717 /*
2718 * inputs:
2719 * zc_name name of filesystem
2720 * zc_value name of property to set
2721 * zc_nvlist_src{_size} nvlist of properties to apply
2722 * zc_cookie received properties flag
2723 *
2724 * outputs:
2725 * zc_nvlist_dst{_size} error for each unapplied received property
2726 */
2727 static int
2728 zfs_ioc_set_prop(zfs_cmd_t *zc)
2729 {
2730 nvlist_t *nvl;
2731 boolean_t received = zc->zc_cookie;
2732 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2733 ZPROP_SRC_LOCAL);
2734 nvlist_t *errors;
2735 int error;
2736
2737 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2738 zc->zc_iflags, &nvl)) != 0)
2739 return (error);
2740
2741 if (received) {
2742 nvlist_t *origprops;
2743
2744 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2745 (void) clear_received_props(zc->zc_name,
2746 origprops, nvl);
2747 nvlist_free(origprops);
2748 }
2749
2750 error = dsl_prop_set_hasrecvd(zc->zc_name);
2751 }
2752
2753 errors = fnvlist_alloc();
2754 if (error == 0)
2755 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2756
2757 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2758 (void) put_nvlist(zc, errors);
2759 }
2760
2761 nvlist_free(errors);
2762 nvlist_free(nvl);
2763 return (error);
2764 }
2765
2766 /*
2767 * inputs:
2768 * zc_name name of filesystem
2769 * zc_value name of property to inherit
2770 * zc_cookie revert to received value if TRUE
2771 *
2772 * outputs: none
2773 */
2774 static int
2775 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2776 {
2777 const char *propname = zc->zc_value;
2778 zfs_prop_t prop = zfs_name_to_prop(propname);
2779 boolean_t received = zc->zc_cookie;
2780 zprop_source_t source = (received
2781 ? ZPROP_SRC_NONE /* revert to received value, if any */
2782 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2783
2784 if (received) {
2785 nvlist_t *dummy;
2786 nvpair_t *pair;
2787 zprop_type_t type;
2788 int err;
2789
2790 /*
2791 * zfs_prop_set_special() expects properties in the form of an
2792 * nvpair with type info.
2793 */
2794 if (prop == ZPROP_INVAL) {
2795 if (!zfs_prop_user(propname))
2796 return (SET_ERROR(EINVAL));
2797
2798 type = PROP_TYPE_STRING;
2799 } else if (prop == ZFS_PROP_VOLSIZE ||
2800 prop == ZFS_PROP_VERSION) {
2801 return (SET_ERROR(EINVAL));
2802 } else {
2803 type = zfs_prop_get_type(prop);
2804 }
2805
2806 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2807
2808 switch (type) {
2809 case PROP_TYPE_STRING:
2810 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2811 break;
2812 case PROP_TYPE_NUMBER:
2813 case PROP_TYPE_INDEX:
2814 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2815 break;
2816 default:
2817 nvlist_free(dummy);
2818 return (SET_ERROR(EINVAL));
2819 }
2820
2821 pair = nvlist_next_nvpair(dummy, NULL);
2822 err = zfs_prop_set_special(zc->zc_name, source, pair);
2823 nvlist_free(dummy);
2824 if (err != -1)
2825 return (err); /* special property already handled */
2826 } else {
2827 /*
2828 * Only check this in the non-received case. We want to allow
2829 * 'inherit -S' to revert non-inheritable properties like quota
2830 * and reservation to the received or default values even though
2831 * they are not considered inheritable.
2832 */
2833 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2834 return (SET_ERROR(EINVAL));
2835 }
2836
2837 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2838 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2839 }
2840
2841 static int
2842 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2843 {
2844 nvlist_t *props;
2845 spa_t *spa;
2846 int error;
2847 nvpair_t *pair;
2848
2849 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2850 zc->zc_iflags, &props))
2851 return (error);
2852
2853 /*
2854 * If the only property is the configfile, then just do a spa_lookup()
2855 * to handle the faulted case.
2856 */
2857 pair = nvlist_next_nvpair(props, NULL);
2858 if (pair != NULL && strcmp(nvpair_name(pair),
2859 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2860 nvlist_next_nvpair(props, pair) == NULL) {
2861 mutex_enter(&spa_namespace_lock);
2862 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2863 spa_configfile_set(spa, props, B_FALSE);
2864 spa_config_sync(spa, B_FALSE, B_TRUE);
2865 }
2866 mutex_exit(&spa_namespace_lock);
2867 if (spa != NULL) {
2868 nvlist_free(props);
2869 return (0);
2870 }
2871 }
2872
2873 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2874 nvlist_free(props);
2875 return (error);
2876 }
2877
2878 error = spa_prop_set(spa, props);
2879
2880 nvlist_free(props);
2881 spa_close(spa, FTAG);
2882
2883 return (error);
2884 }
2885
2886 static int
2887 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2888 {
2889 spa_t *spa;
2890 int error;
2891 nvlist_t *nvp = NULL;
2892
2893 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2894 /*
2895 * If the pool is faulted, there may be properties we can still
2896 * get (such as altroot and cachefile), so attempt to get them
2897 * anyway.
2898 */
2899 mutex_enter(&spa_namespace_lock);
2900 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2901 error = spa_prop_get(spa, &nvp);
2902 mutex_exit(&spa_namespace_lock);
2903 } else {
2904 error = spa_prop_get(spa, &nvp);
2905 spa_close(spa, FTAG);
2906 }
2907
2908 if (error == 0 && zc->zc_nvlist_dst != NULL)
2909 error = put_nvlist(zc, nvp);
2910 else
2911 error = SET_ERROR(EFAULT);
2912
2913 nvlist_free(nvp);
2914 return (error);
2915 }
2916
2917 /*
2918 * inputs:
2919 * zc_name name of filesystem
2920 * zc_nvlist_src{_size} nvlist of delegated permissions
2921 * zc_perm_action allow/unallow flag
2922 *
2923 * outputs: none
2924 */
2925 static int
2926 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2927 {
2928 int error;
2929 nvlist_t *fsaclnv = NULL;
2930
2931 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2932 zc->zc_iflags, &fsaclnv)) != 0)
2933 return (error);
2934
2935 /*
2936 * Verify nvlist is constructed correctly
2937 */
2938 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2939 nvlist_free(fsaclnv);
2940 return (SET_ERROR(EINVAL));
2941 }
2942
2943 /*
2944 * If we don't have PRIV_SYS_MOUNT, then validate
2945 * that user is allowed to hand out each permission in
2946 * the nvlist(s)
2947 */
2948
2949 error = secpolicy_zfs(CRED());
2950 if (error != 0) {
2951 if (zc->zc_perm_action == B_FALSE) {
2952 error = dsl_deleg_can_allow(zc->zc_name,
2953 fsaclnv, CRED());
2954 } else {
2955 error = dsl_deleg_can_unallow(zc->zc_name,
2956 fsaclnv, CRED());
2957 }
2958 }
2959
2960 if (error == 0)
2961 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2962
2963 nvlist_free(fsaclnv);
2964 return (error);
2965 }
2966
2967 /*
2968 * inputs:
2969 * zc_name name of filesystem
2970 *
2971 * outputs:
2972 * zc_nvlist_src{_size} nvlist of delegated permissions
2973 */
2974 static int
2975 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2976 {
2977 nvlist_t *nvp;
2978 int error;
2979
2980 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2981 error = put_nvlist(zc, nvp);
2982 nvlist_free(nvp);
2983 }
2984
2985 return (error);
2986 }
2987
2988 /*
2989 * Search the vfs list for a specified resource. Returns a pointer to it
2990 * or NULL if no suitable entry is found. The caller of this routine
2991 * is responsible for releasing the returned vfs pointer.
2992 */
2993 static vfs_t *
2994 zfs_get_vfs(const char *resource)
2995 {
2996 struct vfs *vfsp;
2997 struct vfs *vfs_found = NULL;
2998
2999 vfs_list_read_lock();
3000 vfsp = rootvfs;
3001 do {
3002 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
3003 VFS_HOLD(vfsp);
3004 vfs_found = vfsp;
3005 break;
3006 }
3007 vfsp = vfsp->vfs_next;
3008 } while (vfsp != rootvfs);
3009 vfs_list_unlock();
3010 return (vfs_found);
3011 }
3012
3013 /* ARGSUSED */
3014 static void
3015 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
3016 {
3017 zfs_creat_t *zct = arg;
3018
3019 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
3020 }
3021
3022 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
3023
3024 /*
3025 * inputs:
3026 * os parent objset pointer (NULL if root fs)
3027 * fuids_ok fuids allowed in this version of the spa?
3028 * sa_ok SAs allowed in this version of the spa?
3029 * createprops list of properties requested by creator
3030 *
3031 * outputs:
3032 * zplprops values for the zplprops we attach to the master node object
3033 * is_ci true if requested file system will be purely case-insensitive
3034 *
3035 * Determine the settings for utf8only, normalization and
3036 * casesensitivity. Specific values may have been requested by the
3037 * creator and/or we can inherit values from the parent dataset. If
3038 * the file system is of too early a vintage, a creator can not
3039 * request settings for these properties, even if the requested
3040 * setting is the default value. We don't actually want to create dsl
3041 * properties for these, so remove them from the source nvlist after
3042 * processing.
3043 */
3044 static int
3045 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
3046 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
3047 nvlist_t *zplprops, boolean_t *is_ci)
3048 {
3049 uint64_t sense = ZFS_PROP_UNDEFINED;
3050 uint64_t norm = ZFS_PROP_UNDEFINED;
3051 uint64_t u8 = ZFS_PROP_UNDEFINED;
3052
3053 ASSERT(zplprops != NULL);
3054
3055 /*
3056 * Pull out creator prop choices, if any.
3057 */
3058 if (createprops) {
3059 (void) nvlist_lookup_uint64(createprops,
3060 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
3061 (void) nvlist_lookup_uint64(createprops,
3062 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
3063 (void) nvlist_remove_all(createprops,
3064 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
3065 (void) nvlist_lookup_uint64(createprops,
3066 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
3067 (void) nvlist_remove_all(createprops,
3068 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
3069 (void) nvlist_lookup_uint64(createprops,
3070 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3071 (void) nvlist_remove_all(createprops,
3072 zfs_prop_to_name(ZFS_PROP_CASE));
3073 }
3074
3075 /*
3076 * If the zpl version requested is whacky or the file system
3077 * or pool is version is too "young" to support normalization
3078 * and the creator tried to set a value for one of the props,
3079 * error out.
3080 */
3081 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3082 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3083 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3084 (zplver < ZPL_VERSION_NORMALIZATION &&
3085 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3086 sense != ZFS_PROP_UNDEFINED)))
3087 return (SET_ERROR(ENOTSUP));
3088
3089 /*
3090 * Put the version in the zplprops
3091 */
3092 VERIFY(nvlist_add_uint64(zplprops,
3093 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3094
3095 if (norm == ZFS_PROP_UNDEFINED)
3096 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3097 VERIFY(nvlist_add_uint64(zplprops,
3098 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3099
3100 /*
3101 * If we're normalizing, names must always be valid UTF-8 strings.
3102 */
3103 if (norm)
3104 u8 = 1;
3105 if (u8 == ZFS_PROP_UNDEFINED)
3106 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3107 VERIFY(nvlist_add_uint64(zplprops,
3108 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3109
3110 if (sense == ZFS_PROP_UNDEFINED)
3111 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3112 VERIFY(nvlist_add_uint64(zplprops,
3113 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3114
3115 if (is_ci)
3116 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3117
3118 return (0);
3119 }
3120
3121 static int
3122 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3123 nvlist_t *zplprops, boolean_t *is_ci)
3124 {
3125 boolean_t fuids_ok, sa_ok;
3126 uint64_t zplver = ZPL_VERSION;
3127 objset_t *os = NULL;
3128 char parentname[MAXNAMELEN];
3129 char *cp;
3130 spa_t *spa;
3131 uint64_t spa_vers;
3132 int error;
3133
3134 (void) strlcpy(parentname, dataset, sizeof (parentname));
3135 cp = strrchr(parentname, '/');
3136 ASSERT(cp != NULL);
3137 cp[0] = '\0';
3138
3139 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3140 return (error);
3141
3142 spa_vers = spa_version(spa);
3143 spa_close(spa, FTAG);
3144
3145 zplver = zfs_zpl_version_map(spa_vers);
3146 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3147 sa_ok = (zplver >= ZPL_VERSION_SA);
3148
3149 /*
3150 * Open parent object set so we can inherit zplprop values.
3151 */
3152 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3153 return (error);
3154
3155 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3156 zplprops, is_ci);
3157 dmu_objset_rele(os, FTAG);
3158 return (error);
3159 }
3160
3161 static int
3162 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3163 nvlist_t *zplprops, boolean_t *is_ci)
3164 {
3165 boolean_t fuids_ok;
3166 boolean_t sa_ok;
3167 uint64_t zplver = ZPL_VERSION;
3168 int error;
3169
3170 zplver = zfs_zpl_version_map(spa_vers);
3171 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3172 sa_ok = (zplver >= ZPL_VERSION_SA);
3173
3174 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3175 createprops, zplprops, is_ci);
3176 return (error);
3177 }
3178
3179 /*
3180 * innvl: {
3181 * "type" -> dmu_objset_type_t (int32)
3182 * (optional) "props" -> { prop -> value }
3183 * }
3184 *
3185 * outnvl: propname -> error code (int32)
3186 */
3187 static int
3188 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3189 {
3190 int error = 0;
3191 zfs_creat_t zct = { 0 };
3192 nvlist_t *nvprops = NULL;
3193 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3194 int32_t type32;
3195 dmu_objset_type_t type;
3196 boolean_t is_insensitive = B_FALSE;
3197
3198 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3199 return (SET_ERROR(EINVAL));
3200 type = type32;
3201 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3202
3203 switch (type) {
3204 case DMU_OST_ZFS:
3205 cbfunc = zfs_create_cb;
3206 break;
3207
3208 case DMU_OST_ZVOL:
3209 cbfunc = zvol_create_cb;
3210 break;
3211
3212 default:
3213 cbfunc = NULL;
3214 break;
3215 }
3216 if (strchr(fsname, '@') ||
3217 strchr(fsname, '%'))
3218 return (SET_ERROR(EINVAL));
3219
3220 zct.zct_props = nvprops;
3221
3222 if (cbfunc == NULL)
3223 return (SET_ERROR(EINVAL));
3224
3225 if (type == DMU_OST_ZVOL) {
3226 uint64_t volsize, volblocksize;
3227
3228 if (nvprops == NULL)
3229 return (SET_ERROR(EINVAL));
3230 if (nvlist_lookup_uint64(nvprops,
3231 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3232 return (SET_ERROR(EINVAL));
3233
3234 if ((error = nvlist_lookup_uint64(nvprops,
3235 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3236 &volblocksize)) != 0 && error != ENOENT)
3237 return (SET_ERROR(EINVAL));
3238
3239 if (error != 0)
3240 volblocksize = zfs_prop_default_numeric(
3241 ZFS_PROP_VOLBLOCKSIZE);
3242
3243 if ((error = zvol_check_volblocksize(
3244 volblocksize)) != 0 ||
3245 (error = zvol_check_volsize(volsize,
3246 volblocksize)) != 0)
3247 return (error);
3248 } else if (type == DMU_OST_ZFS) {
3249 int error;
3250
3251 /*
3252 * We have to have normalization and
3253 * case-folding flags correct when we do the
3254 * file system creation, so go figure them out
3255 * now.
3256 */
3257 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3258 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3259 error = zfs_fill_zplprops(fsname, nvprops,
3260 zct.zct_zplprops, &is_insensitive);
3261 if (error != 0) {
3262 nvlist_free(zct.zct_zplprops);
3263 return (error);
3264 }
3265 }
3266
3267 error = dmu_objset_create(fsname, type,
3268 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3269 nvlist_free(zct.zct_zplprops);
3270
3271 /*
3272 * It would be nice to do this atomically.
3273 */
3274 if (error == 0) {
3275 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3276 nvprops, outnvl);
3277 if (error != 0)
3278 (void) dsl_destroy_head(fsname);
3279 }
3280 return (error);
3281 }
3282
3283 /*
3284 * innvl: {
3285 * "origin" -> name of origin snapshot
3286 * (optional) "props" -> { prop -> value }
3287 * }
3288 *
3289 * outnvl: propname -> error code (int32)
3290 */
3291 static int
3292 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3293 {
3294 int error = 0;
3295 nvlist_t *nvprops = NULL;
3296 char *origin_name;
3297
3298 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3299 return (SET_ERROR(EINVAL));
3300 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3301
3302 if (strchr(fsname, '@') ||
3303 strchr(fsname, '%'))
3304 return (SET_ERROR(EINVAL));
3305
3306 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3307 return (SET_ERROR(EINVAL));
3308 error = dmu_objset_clone(fsname, origin_name);
3309 if (error != 0)
3310 return (error);
3311
3312 /*
3313 * It would be nice to do this atomically.
3314 */
3315 if (error == 0) {
3316 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3317 nvprops, outnvl);
3318 if (error != 0)
3319 (void) dsl_destroy_head(fsname);
3320 }
3321 return (error);
3322 }
3323
3324 /*
3325 * innvl: {
3326 * "snaps" -> { snapshot1, snapshot2 }
3327 * (optional) "props" -> { prop -> value (string) }
3328 * }
3329 *
3330 * outnvl: snapshot -> error code (int32)
3331 */
3332 static int
3333 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3334 {
3335 nvlist_t *snaps;
3336 nvlist_t *props = NULL;
3337 int error, poollen;
3338 nvpair_t *pair;
3339
3340 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3341 if ((error = zfs_check_userprops(poolname, props)) != 0)
3342 return (error);
3343
3344 if (!nvlist_empty(props) &&
3345 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3346 return (SET_ERROR(ENOTSUP));
3347
3348 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3349 return (SET_ERROR(EINVAL));
3350 poollen = strlen(poolname);
3351 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3352 pair = nvlist_next_nvpair(snaps, pair)) {
3353 const char *name = nvpair_name(pair);
3354 const char *cp = strchr(name, '@');
3355
3356 /*
3357 * The snap name must contain an @, and the part after it must
3358 * contain only valid characters.
3359 */
3360 if (cp == NULL ||
3361 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3362 return (SET_ERROR(EINVAL));
3363
3364 /*
3365 * The snap must be in the specified pool.
3366 */
3367 if (strncmp(name, poolname, poollen) != 0 ||
3368 (name[poollen] != '/' && name[poollen] != '@'))
3369 return (SET_ERROR(EXDEV));
3370
3371 /* This must be the only snap of this fs. */
3372 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3373 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3374 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3375 == 0) {
3376 return (SET_ERROR(EXDEV));
3377 }
3378 }
3379 }
3380
3381 error = dsl_dataset_snapshot(snaps, props, outnvl);
3382 return (error);
3383 }
3384
3385 /*
3386 * innvl: "message" -> string
3387 */
3388 /* ARGSUSED */
3389 static int
3390 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3391 {
3392 char *message;
3393 spa_t *spa;
3394 int error;
3395 char *poolname;
3396
3397 /*
3398 * The poolname in the ioctl is not set, we get it from the TSD,
3399 * which was set at the end of the last successful ioctl that allows
3400 * logging. The secpolicy func already checked that it is set.
3401 * Only one log ioctl is allowed after each successful ioctl, so
3402 * we clear the TSD here.
3403 */
3404 poolname = tsd_get(zfs_allow_log_key);
3405 (void) tsd_set(zfs_allow_log_key, NULL);
3406 error = spa_open(poolname, &spa, FTAG);
3407 strfree(poolname);
3408 if (error != 0)
3409 return (error);
3410
3411 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3412 spa_close(spa, FTAG);
3413 return (SET_ERROR(EINVAL));
3414 }
3415
3416 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3417 spa_close(spa, FTAG);
3418 return (SET_ERROR(ENOTSUP));
3419 }
3420
3421 error = spa_history_log(spa, message);
3422 spa_close(spa, FTAG);
3423 return (error);
3424 }
3425
3426 /*
3427 * The dp_config_rwlock must not be held when calling this, because the
3428 * unmount may need to write out data.
3429 *
3430 * This function is best-effort. Callers must deal gracefully if it
3431 * remains mounted (or is remounted after this call).
3432 *
3433 * Returns 0 if the argument is not a snapshot, or it is not currently a
3434 * filesystem, or we were able to unmount it. Returns error code otherwise.
3435 */
3436 int
3437 zfs_unmount_snap(const char *snapname)
3438 {
3439 vfs_t *vfsp;
3440 zfsvfs_t *zfsvfs;
3441 int err;
3442
3443 if (strchr(snapname, '@') == NULL)
3444 return (0);
3445
3446 vfsp = zfs_get_vfs(snapname);
3447 if (vfsp == NULL)
3448 return (0);
3449
3450 zfsvfs = vfsp->vfs_data;
3451 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3452
3453 err = vn_vfswlock(vfsp->vfs_vnodecovered);
3454 VFS_RELE(vfsp);
3455 if (err != 0)
3456 return (SET_ERROR(err));
3457
3458 /*
3459 * Always force the unmount for snapshots.
3460 */
3461 (void) dounmount(vfsp, MS_FORCE, kcred);
3462 return (0);
3463 }
3464
3465 /* ARGSUSED */
3466 static int
3467 zfs_unmount_snap_cb(const char *snapname, void *arg)
3468 {
3469 return (zfs_unmount_snap(snapname));
3470 }
3471
3472 /*
3473 * When a clone is destroyed, its origin may also need to be destroyed,
3474 * in which case it must be unmounted. This routine will do that unmount
3475 * if necessary.
3476 */
3477 void
3478 zfs_destroy_unmount_origin(const char *fsname)
3479 {
3480 int error;
3481 objset_t *os;
3482 dsl_dataset_t *ds;
3483
3484 error = dmu_objset_hold(fsname, FTAG, &os);
3485 if (error != 0)
3486 return;
3487 ds = dmu_objset_ds(os);
3488 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3489 char originname[MAXNAMELEN];
3490 dsl_dataset_name(ds->ds_prev, originname);
3491 dmu_objset_rele(os, FTAG);
3492 (void) zfs_unmount_snap(originname);
3493 } else {
3494 dmu_objset_rele(os, FTAG);
3495 }
3496 }
3497
3498 /*
3499 * innvl: {
3500 * "snaps" -> { snapshot1, snapshot2 }
3501 * (optional boolean) "defer"
3502 * }
3503 *
3504 * outnvl: snapshot -> error code (int32)
3505 *
3506 */
3507 /* ARGSUSED */
3508 static int
3509 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3510 {
3511 nvlist_t *snaps;
3512 nvpair_t *pair;
3513 boolean_t defer;
3514
3515 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3516 return (SET_ERROR(EINVAL));
3517 defer = nvlist_exists(innvl, "defer");
3518
3519 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3520 pair = nvlist_next_nvpair(snaps, pair)) {
3521 (void) zfs_unmount_snap(nvpair_name(pair));
3522 }
3523
3524 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3525 }
3526
3527 /*
3528 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>.
3529 * All bookmarks must be in the same pool.
3530 *
3531 * innvl: {
3532 * bookmark1 -> snapshot1, bookmark2 -> snapshot2
3533 * }
3534 *
3535 * outnvl: bookmark -> error code (int32)
3536 *
3537 */
3538 /* ARGSUSED */
3539 static int
3540 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3541 {
3542 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3543 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3544 char *snap_name;
3545
3546 /*
3547 * Verify the snapshot argument.
3548 */
3549 if (nvpair_value_string(pair, &snap_name) != 0)
3550 return (SET_ERROR(EINVAL));
3551
3552
3553 /* Verify that the keys (bookmarks) are unique */
3554 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair);
3555 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) {
3556 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0)
3557 return (SET_ERROR(EINVAL));
3558 }
3559 }
3560
3561 return (dsl_bookmark_create(innvl, outnvl));
3562 }
3563
3564 /*
3565 * innvl: {
3566 * property 1, property 2, ...
3567 * }
3568 *
3569 * outnvl: {
3570 * bookmark name 1 -> { property 1, property 2, ... },
3571 * bookmark name 2 -> { property 1, property 2, ... }
3572 * }
3573 *
3574 */
3575 static int
3576 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3577 {
3578 return (dsl_get_bookmarks(fsname, innvl, outnvl));
3579 }
3580
3581 /*
3582 * innvl: {
3583 * bookmark name 1, bookmark name 2
3584 * }
3585 *
3586 * outnvl: bookmark -> error code (int32)
3587 *
3588 */
3589 static int
3590 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl,
3591 nvlist_t *outnvl)
3592 {
3593 int error, poollen;
3594
3595 poollen = strlen(poolname);
3596 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3597 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3598 const char *name = nvpair_name(pair);
3599 const char *cp = strchr(name, '#');
3600
3601 /*
3602 * The bookmark name must contain an #, and the part after it
3603 * must contain only valid characters.
3604 */
3605 if (cp == NULL ||
3606 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3607 return (SET_ERROR(EINVAL));
3608
3609 /*
3610 * The bookmark must be in the specified pool.
3611 */
3612 if (strncmp(name, poolname, poollen) != 0 ||
3613 (name[poollen] != '/' && name[poollen] != '#'))
3614 return (SET_ERROR(EXDEV));
3615 }
3616
3617 error = dsl_bookmark_destroy(innvl, outnvl);
3618 return (error);
3619 }
3620
3621 /*
3622 * inputs:
3623 * zc_name name of dataset to destroy
3624 * zc_objset_type type of objset
3625 * zc_defer_destroy mark for deferred destroy
3626 *
3627 * outputs: none
3628 */
3629 static int
3630 zfs_ioc_destroy(zfs_cmd_t *zc)
3631 {
3632 int err;
3633
3634 if (zc->zc_objset_type == DMU_OST_ZFS) {
3635 err = zfs_unmount_snap(zc->zc_name);
3636 if (err != 0)
3637 return (err);
3638 }
3639
3640 if (strchr(zc->zc_name, '@'))
3641 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3642 else
3643 err = dsl_destroy_head(zc->zc_name);
3644 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3645 (void) zvol_remove_minor(zc->zc_name);
3646 return (err);
3647 }
3648
3649 /*
3650 * fsname is name of dataset to rollback (to most recent snapshot)
3651 *
3652 * innvl is not used.
3653 *
3654 * outnvl: "target" -> name of most recent snapshot
3655 * }
3656 */
3657 /* ARGSUSED */
3658 static int
3659 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl)
3660 {
3661 zfsvfs_t *zfsvfs;
3662 int error;
3663
3664 if (getzfsvfs(fsname, &zfsvfs) == 0) {
3665 error = zfs_suspend_fs(zfsvfs);
3666 if (error == 0) {
3667 int resume_err;
3668
3669 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl);
3670 resume_err = zfs_resume_fs(zfsvfs, fsname);
3671 error = error ? error : resume_err;
3672 }
3673 VFS_RELE(zfsvfs->z_vfs);
3674 } else {
3675 error = dsl_dataset_rollback(fsname, NULL, outnvl);
3676 }
3677 return (error);
3678 }
3679
3680 static int
3681 recursive_unmount(const char *fsname, void *arg)
3682 {
3683 const char *snapname = arg;
3684 char fullname[MAXNAMELEN];
3685
3686 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3687 return (zfs_unmount_snap(fullname));
3688 }
3689
3690 /*
3691 * inputs:
3692 * zc_name old name of dataset
3693 * zc_value new name of dataset
3694 * zc_cookie recursive flag (only valid for snapshots)
3695 *
3696 * outputs: none
3697 */
3698 static int
3699 zfs_ioc_rename(zfs_cmd_t *zc)
3700 {
3701 boolean_t recursive = zc->zc_cookie & 1;
3702 char *at;
3703
3704 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3705 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3706 strchr(zc->zc_value, '%'))
3707 return (SET_ERROR(EINVAL));
3708
3709 at = strchr(zc->zc_name, '@');
3710 if (at != NULL) {
3711 /* snaps must be in same fs */
3712 int error;
3713
3714 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3715 return (SET_ERROR(EXDEV));
3716 *at = '\0';
3717 if (zc->zc_objset_type == DMU_OST_ZFS) {
3718 error = dmu_objset_find(zc->zc_name,
3719 recursive_unmount, at + 1,
3720 recursive ? DS_FIND_CHILDREN : 0);
3721 if (error != 0) {
3722 *at = '@';
3723 return (error);
3724 }
3725 }
3726 error = dsl_dataset_rename_snapshot(zc->zc_name,
3727 at + 1, strchr(zc->zc_value, '@') + 1, recursive);
3728 *at = '@';
3729
3730 return (error);
3731 } else {
3732 if (zc->zc_objset_type == DMU_OST_ZVOL)
3733 (void) zvol_remove_minor(zc->zc_name);
3734 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3735 }
3736 }
3737
3738 static int
3739 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3740 {
3741 const char *propname = nvpair_name(pair);
3742 boolean_t issnap = (strchr(dsname, '@') != NULL);
3743 zfs_prop_t prop = zfs_name_to_prop(propname);
3744 uint64_t intval;
3745 int err;
3746
3747 if (prop == ZPROP_INVAL) {
3748 if (zfs_prop_user(propname)) {
3749 if (err = zfs_secpolicy_write_perms(dsname,
3750 ZFS_DELEG_PERM_USERPROP, cr))
3751 return (err);
3752 return (0);
3753 }
3754
3755 if (!issnap && zfs_prop_userquota(propname)) {
3756 const char *perm = NULL;
3757 const char *uq_prefix =
3758 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3759 const char *gq_prefix =
3760 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3761
3762 if (strncmp(propname, uq_prefix,
3763 strlen(uq_prefix)) == 0) {
3764 perm = ZFS_DELEG_PERM_USERQUOTA;
3765 } else if (strncmp(propname, gq_prefix,
3766 strlen(gq_prefix)) == 0) {
3767 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3768 } else {
3769 /* USERUSED and GROUPUSED are read-only */
3770 return (SET_ERROR(EINVAL));
3771 }
3772
3773 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3774 return (err);
3775 return (0);
3776 }
3777
3778 return (SET_ERROR(EINVAL));
3779 }
3780
3781 if (issnap)
3782 return (SET_ERROR(EINVAL));
3783
3784 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3785 /*
3786 * dsl_prop_get_all_impl() returns properties in this
3787 * format.
3788 */
3789 nvlist_t *attrs;
3790 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3791 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3792 &pair) == 0);
3793 }
3794
3795 /*
3796 * Check that this value is valid for this pool version
3797 */
3798 switch (prop) {
3799 case ZFS_PROP_COMPRESSION:
3800 /*
3801 * If the user specified gzip compression, make sure
3802 * the SPA supports it. We ignore any errors here since
3803 * we'll catch them later.
3804 */
3805 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3806 nvpair_value_uint64(pair, &intval) == 0) {
3807 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3808 intval <= ZIO_COMPRESS_GZIP_9 &&
3809 zfs_earlier_version(dsname,
3810 SPA_VERSION_GZIP_COMPRESSION)) {
3811 return (SET_ERROR(ENOTSUP));
3812 }
3813
3814 if (intval == ZIO_COMPRESS_ZLE &&
3815 zfs_earlier_version(dsname,
3816 SPA_VERSION_ZLE_COMPRESSION))
3817 return (SET_ERROR(ENOTSUP));
3818
3819 if (intval == ZIO_COMPRESS_LZ4) {
3820 spa_t *spa;
3821
3822 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3823 return (err);
3824
3825 if (!spa_feature_is_enabled(spa,
3826 SPA_FEATURE_LZ4_COMPRESS)) {
3827 spa_close(spa, FTAG);
3828 return (SET_ERROR(ENOTSUP));
3829 }
3830 spa_close(spa, FTAG);
3831 }
3832
3833 /*
3834 * If this is a bootable dataset then
3835 * verify that the compression algorithm
3836 * is supported for booting. We must return
3837 * something other than ENOTSUP since it
3838 * implies a downrev pool version.
3839 */
3840 if (zfs_is_bootfs(dsname) &&
3841 !BOOTFS_COMPRESS_VALID(intval)) {
3842 return (SET_ERROR(ERANGE));
3843 }
3844 }
3845 break;
3846
3847 case ZFS_PROP_COPIES:
3848 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3849 return (SET_ERROR(ENOTSUP));
3850 break;
3851
3852 case ZFS_PROP_DEDUP:
3853 if (zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3854 return (SET_ERROR(ENOTSUP));
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
3873 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3874 }
3875
3876 /*
3877 * Checks for a race condition to make sure we don't increment a feature flag
3878 * multiple times.
3879 */
3880 static int
3881 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
3882 {
3883 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3884 spa_feature_t *featurep = arg;
3885
3886 if (!spa_feature_is_active(spa, *featurep))
3887 return (0);
3888 else
3889 return (SET_ERROR(EBUSY));
3890 }
3891
3892 /*
3893 * The callback invoked on feature activation in the sync task caused by
3894 * zfs_prop_activate_feature.
3895 */
3896 static void
3897 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
3898 {
3899 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3900 spa_feature_t *featurep = arg;
3901
3902 spa_feature_incr(spa, *featurep, tx);
3903 }
3904
3905 /*
3906 * Activates a feature on a pool in response to a property setting. This
3907 * creates a new sync task which modifies the pool to reflect the feature
3908 * as being active.
3909 */
3910 static int
3911 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature)
3912 {
3913 int err;
3914
3915 /* EBUSY here indicates that the feature is already active */
3916 err = dsl_sync_task(spa_name(spa),
3917 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
3918 &feature, 2);
3919
3920 if (err != 0 && err != EBUSY)
3921 return (err);
3922 else
3923 return (0);
3924 }
3925
3926 /*
3927 * Removes properties from the given props list that fail permission checks
3928 * needed to clear them and to restore them in case of a receive error. For each
3929 * property, make sure we have both set and inherit permissions.
3930 *
3931 * Returns the first error encountered if any permission checks fail. If the
3932 * caller provides a non-NULL errlist, it also gives the complete list of names
3933 * of all the properties that failed a permission check along with the
3934 * corresponding error numbers. The caller is responsible for freeing the
3935 * returned errlist.
3936 *
3937 * If every property checks out successfully, zero is returned and the list
3938 * pointed at by errlist is NULL.
3939 */
3940 static int
3941 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3942 {
3943 zfs_cmd_t *zc;
3944 nvpair_t *pair, *next_pair;
3945 nvlist_t *errors;
3946 int err, rv = 0;
3947
3948 if (props == NULL)
3949 return (0);
3950
3951 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3952
3953 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3954 (void) strcpy(zc->zc_name, dataset);
3955 pair = nvlist_next_nvpair(props, NULL);
3956 while (pair != NULL) {
3957 next_pair = nvlist_next_nvpair(props, pair);
3958
3959 (void) strcpy(zc->zc_value, nvpair_name(pair));
3960 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
3961 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
3962 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
3963 VERIFY(nvlist_add_int32(errors,
3964 zc->zc_value, err) == 0);
3965 }
3966 pair = next_pair;
3967 }
3968 kmem_free(zc, sizeof (zfs_cmd_t));
3969
3970 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
3971 nvlist_free(errors);
3972 errors = NULL;
3973 } else {
3974 VERIFY(nvpair_value_int32(pair, &rv) == 0);
3975 }
3976
3977 if (errlist == NULL)
3978 nvlist_free(errors);
3979 else
3980 *errlist = errors;
3981
3982 return (rv);
3983 }
3984
3985 static boolean_t
3986 propval_equals(nvpair_t *p1, nvpair_t *p2)
3987 {
3988 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
3989 /* dsl_prop_get_all_impl() format */
3990 nvlist_t *attrs;
3991 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
3992 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3993 &p1) == 0);
3994 }
3995
3996 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
3997 nvlist_t *attrs;
3998 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
3999 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
4000 &p2) == 0);
4001 }
4002
4003 if (nvpair_type(p1) != nvpair_type(p2))
4004 return (B_FALSE);
4005
4006 if (nvpair_type(p1) == DATA_TYPE_STRING) {
4007 char *valstr1, *valstr2;
4008
4009 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
4010 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
4011 return (strcmp(valstr1, valstr2) == 0);
4012 } else {
4013 uint64_t intval1, intval2;
4014
4015 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
4016 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
4017 return (intval1 == intval2);
4018 }
4019 }
4020
4021 /*
4022 * Remove properties from props if they are not going to change (as determined
4023 * by comparison with origprops). Remove them from origprops as well, since we
4024 * do not need to clear or restore properties that won't change.
4025 */
4026 static void
4027 props_reduce(nvlist_t *props, nvlist_t *origprops)
4028 {
4029 nvpair_t *pair, *next_pair;
4030
4031 if (origprops == NULL)
4032 return; /* all props need to be received */
4033
4034 pair = nvlist_next_nvpair(props, NULL);
4035 while (pair != NULL) {
4036 const char *propname = nvpair_name(pair);
4037 nvpair_t *match;
4038
4039 next_pair = nvlist_next_nvpair(props, pair);
4040
4041 if ((nvlist_lookup_nvpair(origprops, propname,
4042 &match) != 0) || !propval_equals(pair, match))
4043 goto next; /* need to set received value */
4044
4045 /* don't clear the existing received value */
4046 (void) nvlist_remove_nvpair(origprops, match);
4047 /* don't bother receiving the property */
4048 (void) nvlist_remove_nvpair(props, pair);
4049 next:
4050 pair = next_pair;
4051 }
4052 }
4053
4054 #ifdef DEBUG
4055 static boolean_t zfs_ioc_recv_inject_err;
4056 #endif
4057
4058 /*
4059 * inputs:
4060 * zc_name name of containing filesystem
4061 * zc_nvlist_src{_size} nvlist of properties to apply
4062 * zc_value name of snapshot to create
4063 * zc_string name of clone origin (if DRR_FLAG_CLONE)
4064 * zc_cookie file descriptor to recv from
4065 * zc_begin_record the BEGIN record of the stream (not byteswapped)
4066 * zc_guid force flag
4067 * zc_cleanup_fd cleanup-on-exit file descriptor
4068 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
4069 *
4070 * outputs:
4071 * zc_cookie number of bytes read
4072 * zc_nvlist_dst{_size} error for each unapplied received property
4073 * zc_obj zprop_errflags_t
4074 * zc_action_handle handle for this guid/ds mapping
4075 */
4076 static int
4077 zfs_ioc_recv(zfs_cmd_t *zc)
4078 {
4079 file_t *fp;
4080 dmu_recv_cookie_t drc;
4081 boolean_t force = (boolean_t)zc->zc_guid;
4082 int fd;
4083 int error = 0;
4084 int props_error = 0;
4085 nvlist_t *errors;
4086 offset_t off;
4087 nvlist_t *props = NULL; /* sent properties */
4088 nvlist_t *origprops = NULL; /* existing properties */
4089 char *origin = NULL;
4090 char *tosnap;
4091 char tofs[ZFS_MAXNAMELEN];
4092 boolean_t first_recvd_props = B_FALSE;
4093
4094 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
4095 strchr(zc->zc_value, '@') == NULL ||
4096 strchr(zc->zc_value, '%'))
4097 return (SET_ERROR(EINVAL));
4098
4099 (void) strcpy(tofs, zc->zc_value);
4100 tosnap = strchr(tofs, '@');
4101 *tosnap++ = '\0';
4102
4103 if (zc->zc_nvlist_src != NULL &&
4104 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
4105 zc->zc_iflags, &props)) != 0)
4106 return (error);
4107
4108 fd = zc->zc_cookie;
4109 fp = getf(fd);
4110 if (fp == NULL) {
4111 nvlist_free(props);
4112 return (SET_ERROR(EBADF));
4113 }
4114
4115 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4116
4117 if (zc->zc_string[0])
4118 origin = zc->zc_string;
4119
4120 error = dmu_recv_begin(tofs, tosnap,
4121 &zc->zc_begin_record, force, origin, &drc);
4122 if (error != 0)
4123 goto out;
4124
4125 /*
4126 * Set properties before we receive the stream so that they are applied
4127 * to the new data. Note that we must call dmu_recv_stream() if
4128 * dmu_recv_begin() succeeds.
4129 */
4130 if (props != NULL && !drc.drc_newfs) {
4131 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
4132 SPA_VERSION_RECVD_PROPS &&
4133 !dsl_prop_get_hasrecvd(tofs))
4134 first_recvd_props = B_TRUE;
4135
4136 /*
4137 * If new received properties are supplied, they are to
4138 * completely replace the existing received properties, so stash
4139 * away the existing ones.
4140 */
4141 if (dsl_prop_get_received(tofs, &origprops) == 0) {
4142 nvlist_t *errlist = NULL;
4143 /*
4144 * Don't bother writing a property if its value won't
4145 * change (and avoid the unnecessary security checks).
4146 *
4147 * The first receive after SPA_VERSION_RECVD_PROPS is a
4148 * special case where we blow away all local properties
4149 * regardless.
4150 */
4151 if (!first_recvd_props)
4152 props_reduce(props, origprops);
4153 if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
4154 (void) nvlist_merge(errors, errlist, 0);
4155 nvlist_free(errlist);
4156
4157 if (clear_received_props(tofs, origprops,
4158 first_recvd_props ? NULL : props) != 0)
4159 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4160 } else {
4161 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4162 }
4163 }
4164
4165 if (props != NULL) {
4166 props_error = dsl_prop_set_hasrecvd(tofs);
4167
4168 if (props_error == 0) {
4169 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4170 props, errors);
4171 }
4172 }
4173
4174 if (zc->zc_nvlist_dst_size != 0 &&
4175 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4176 put_nvlist(zc, errors) != 0)) {
4177 /*
4178 * Caller made zc->zc_nvlist_dst less than the minimum expected
4179 * size or supplied an invalid address.
4180 */
4181 props_error = SET_ERROR(EINVAL);
4182 }
4183
4184 off = fp->f_offset;
4185 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4186 &zc->zc_action_handle);
4187
4188 if (error == 0) {
4189 zfsvfs_t *zfsvfs = NULL;
4190
4191 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4192 /* online recv */
4193 int end_err;
4194
4195 error = zfs_suspend_fs(zfsvfs);
4196 /*
4197 * If the suspend fails, then the recv_end will
4198 * likely also fail, and clean up after itself.
4199 */
4200 end_err = dmu_recv_end(&drc, zfsvfs);
4201 if (error == 0)
4202 error = zfs_resume_fs(zfsvfs, tofs);
4203 error = error ? error : end_err;
4204 VFS_RELE(zfsvfs->z_vfs);
4205 } else {
4206 error = dmu_recv_end(&drc, NULL);
4207 }
4208 }
4209
4210 zc->zc_cookie = off - fp->f_offset;
4211 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4212 fp->f_offset = off;
4213
4214 #ifdef DEBUG
4215 if (zfs_ioc_recv_inject_err) {
4216 zfs_ioc_recv_inject_err = B_FALSE;
4217 error = 1;
4218 }
4219 #endif
4220 /*
4221 * On error, restore the original props.
4222 */
4223 if (error != 0 && props != NULL && !drc.drc_newfs) {
4224 if (clear_received_props(tofs, props, NULL) != 0) {
4225 /*
4226 * We failed to clear the received properties.
4227 * Since we may have left a $recvd value on the
4228 * system, we can't clear the $hasrecvd flag.
4229 */
4230 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4231 } else if (first_recvd_props) {
4232 dsl_prop_unset_hasrecvd(tofs);
4233 }
4234
4235 if (origprops == NULL && !drc.drc_newfs) {
4236 /* We failed to stash the original properties. */
4237 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4238 }
4239
4240 /*
4241 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4242 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4243 * explictly if we're restoring local properties cleared in the
4244 * first new-style receive.
4245 */
4246 if (origprops != NULL &&
4247 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4248 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4249 origprops, NULL) != 0) {
4250 /*
4251 * We stashed the original properties but failed to
4252 * restore them.
4253 */
4254 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4255 }
4256 }
4257 out:
4258 nvlist_free(props);
4259 nvlist_free(origprops);
4260 nvlist_free(errors);
4261 releasef(fd);
4262
4263 if (error == 0)
4264 error = props_error;
4265
4266 return (error);
4267 }
4268
4269 /*
4270 * inputs:
4271 * zc_name name of snapshot to send
4272 * zc_cookie file descriptor to send stream to
4273 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4274 * zc_sendobj objsetid of snapshot to send
4275 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4276 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4277 * output size in zc_objset_type.
4278 *
4279 * outputs:
4280 * zc_objset_type estimated size, if zc_guid is set
4281 */
4282 static int
4283 zfs_ioc_send(zfs_cmd_t *zc)
4284 {
4285 int error;
4286 offset_t off;
4287 boolean_t estimate = (zc->zc_guid != 0);
4288
4289 if (zc->zc_obj != 0) {
4290 dsl_pool_t *dp;
4291 dsl_dataset_t *tosnap;
4292
4293 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4294 if (error != 0)
4295 return (error);
4296
4297 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4298 if (error != 0) {
4299 dsl_pool_rele(dp, FTAG);
4300 return (error);
4301 }
4302
4303 if (dsl_dir_is_clone(tosnap->ds_dir))
4304 zc->zc_fromobj = tosnap->ds_dir->dd_phys->dd_origin_obj;
4305 dsl_dataset_rele(tosnap, FTAG);
4306 dsl_pool_rele(dp, FTAG);
4307 }
4308
4309 if (estimate) {
4310 dsl_pool_t *dp;
4311 dsl_dataset_t *tosnap;
4312 dsl_dataset_t *fromsnap = NULL;
4313
4314 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4315 if (error != 0)
4316 return (error);
4317
4318 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4319 if (error != 0) {
4320 dsl_pool_rele(dp, FTAG);
4321 return (error);
4322 }
4323
4324 if (zc->zc_fromobj != 0) {
4325 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4326 FTAG, &fromsnap);
4327 if (error != 0) {
4328 dsl_dataset_rele(tosnap, FTAG);
4329 dsl_pool_rele(dp, FTAG);
4330 return (error);
4331 }
4332 }
4333
4334 error = dmu_send_estimate(tosnap, fromsnap,
4335 &zc->zc_objset_type);
4336
4337 if (fromsnap != NULL)
4338 dsl_dataset_rele(fromsnap, FTAG);
4339 dsl_dataset_rele(tosnap, FTAG);
4340 dsl_pool_rele(dp, FTAG);
4341 } else {
4342 file_t *fp = getf(zc->zc_cookie);
4343 if (fp == NULL)
4344 return (SET_ERROR(EBADF));
4345
4346 off = fp->f_offset;
4347 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4348 zc->zc_fromobj, zc->zc_cookie, fp->f_vnode, &off);
4349
4350 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4351 fp->f_offset = off;
4352 releasef(zc->zc_cookie);
4353 }
4354 return (error);
4355 }
4356
4357 /*
4358 * inputs:
4359 * zc_name name of snapshot on which to report progress
4360 * zc_cookie file descriptor of send stream
4361 *
4362 * outputs:
4363 * zc_cookie number of bytes written in send stream thus far
4364 */
4365 static int
4366 zfs_ioc_send_progress(zfs_cmd_t *zc)
4367 {
4368 dsl_pool_t *dp;
4369 dsl_dataset_t *ds;
4370 dmu_sendarg_t *dsp = NULL;
4371 int error;
4372
4373 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4374 if (error != 0)
4375 return (error);
4376
4377 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4378 if (error != 0) {
4379 dsl_pool_rele(dp, FTAG);
4380 return (error);
4381 }
4382
4383 mutex_enter(&ds->ds_sendstream_lock);
4384
4385 /*
4386 * Iterate over all the send streams currently active on this dataset.
4387 * If there's one which matches the specified file descriptor _and_ the
4388 * stream was started by the current process, return the progress of
4389 * that stream.
4390 */
4391 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4392 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4393 if (dsp->dsa_outfd == zc->zc_cookie &&
4394 dsp->dsa_proc == curproc)
4395 break;
4396 }
4397
4398 if (dsp != NULL)
4399 zc->zc_cookie = *(dsp->dsa_off);
4400 else
4401 error = SET_ERROR(ENOENT);
4402
4403 mutex_exit(&ds->ds_sendstream_lock);
4404 dsl_dataset_rele(ds, FTAG);
4405 dsl_pool_rele(dp, FTAG);
4406 return (error);
4407 }
4408
4409 static int
4410 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4411 {
4412 int id, error;
4413
4414 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4415 &zc->zc_inject_record);
4416
4417 if (error == 0)
4418 zc->zc_guid = (uint64_t)id;
4419
4420 return (error);
4421 }
4422
4423 static int
4424 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4425 {
4426 return (zio_clear_fault((int)zc->zc_guid));
4427 }
4428
4429 static int
4430 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4431 {
4432 int id = (int)zc->zc_guid;
4433 int error;
4434
4435 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4436 &zc->zc_inject_record);
4437
4438 zc->zc_guid = id;
4439
4440 return (error);
4441 }
4442
4443 static int
4444 zfs_ioc_error_log(zfs_cmd_t *zc)
4445 {
4446 spa_t *spa;
4447 int error;
4448 size_t count = (size_t)zc->zc_nvlist_dst_size;
4449
4450 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4451 return (error);
4452
4453 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4454 &count);
4455 if (error == 0)
4456 zc->zc_nvlist_dst_size = count;
4457 else
4458 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4459
4460 spa_close(spa, FTAG);
4461
4462 return (error);
4463 }
4464
4465 static int
4466 zfs_ioc_clear(zfs_cmd_t *zc)
4467 {
4468 spa_t *spa;
4469 vdev_t *vd;
4470 int error;
4471
4472 /*
4473 * On zpool clear we also fix up missing slogs
4474 */
4475 mutex_enter(&spa_namespace_lock);
4476 spa = spa_lookup(zc->zc_name);
4477 if (spa == NULL) {
4478 mutex_exit(&spa_namespace_lock);
4479 return (SET_ERROR(EIO));
4480 }
4481 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4482 /* we need to let spa_open/spa_load clear the chains */
4483 spa_set_log_state(spa, SPA_LOG_CLEAR);
4484 }
4485 spa->spa_last_open_failed = 0;
4486 mutex_exit(&spa_namespace_lock);
4487
4488 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4489 error = spa_open(zc->zc_name, &spa, FTAG);
4490 } else {
4491 nvlist_t *policy;
4492 nvlist_t *config = NULL;
4493
4494 if (zc->zc_nvlist_src == NULL)
4495 return (SET_ERROR(EINVAL));
4496
4497 if ((error = get_nvlist(zc->zc_nvlist_src,
4498 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4499 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4500 policy, &config);
4501 if (config != NULL) {
4502 int err;
4503
4504 if ((err = put_nvlist(zc, config)) != 0)
4505 error = err;
4506 nvlist_free(config);
4507 }
4508 nvlist_free(policy);
4509 }
4510 }
4511
4512 if (error != 0)
4513 return (error);
4514
4515 spa_vdev_state_enter(spa, SCL_NONE);
4516
4517 if (zc->zc_guid == 0) {
4518 vd = NULL;
4519 } else {
4520 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4521 if (vd == NULL) {
4522 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4523 spa_close(spa, FTAG);
4524 return (SET_ERROR(ENODEV));
4525 }
4526 }
4527
4528 vdev_clear(spa, vd);
4529
4530 (void) spa_vdev_state_exit(spa, NULL, 0);
4531
4532 /*
4533 * Resume any suspended I/Os.
4534 */
4535 if (zio_resume(spa) != 0)
4536 error = SET_ERROR(EIO);
4537
4538 spa_close(spa, FTAG);
4539
4540 return (error);
4541 }
4542
4543 static int
4544 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4545 {
4546 spa_t *spa;
4547 int error;
4548
4549 error = spa_open(zc->zc_name, &spa, FTAG);
4550 if (error != 0)
4551 return (error);
4552
4553 spa_vdev_state_enter(spa, SCL_NONE);
4554
4555 /*
4556 * If a resilver is already in progress then set the
4557 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4558 * the scan as a side effect of the reopen. Otherwise, let
4559 * vdev_open() decided if a resilver is required.
4560 */
4561 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4562 vdev_reopen(spa->spa_root_vdev);
4563 spa->spa_scrub_reopen = B_FALSE;
4564
4565 (void) spa_vdev_state_exit(spa, NULL, 0);
4566 spa_close(spa, FTAG);
4567 return (0);
4568 }
4569 /*
4570 * inputs:
4571 * zc_name name of filesystem
4572 * zc_value name of origin snapshot
4573 *
4574 * outputs:
4575 * zc_string name of conflicting snapshot, if there is one
4576 */
4577 static int
4578 zfs_ioc_promote(zfs_cmd_t *zc)
4579 {
4580 char *cp;
4581
4582 /*
4583 * We don't need to unmount *all* the origin fs's snapshots, but
4584 * it's easier.
4585 */
4586 cp = strchr(zc->zc_value, '@');
4587 if (cp)
4588 *cp = '\0';
4589 (void) dmu_objset_find(zc->zc_value,
4590 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4591 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4592 }
4593
4594 /*
4595 * Retrieve a single {user|group}{used|quota}@... property.
4596 *
4597 * inputs:
4598 * zc_name name of filesystem
4599 * zc_objset_type zfs_userquota_prop_t
4600 * zc_value domain name (eg. "S-1-234-567-89")
4601 * zc_guid RID/UID/GID
4602 *
4603 * outputs:
4604 * zc_cookie property value
4605 */
4606 static int
4607 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4608 {
4609 zfsvfs_t *zfsvfs;
4610 int error;
4611
4612 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4613 return (SET_ERROR(EINVAL));
4614
4615 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4616 if (error != 0)
4617 return (error);
4618
4619 error = zfs_userspace_one(zfsvfs,
4620 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4621 zfsvfs_rele(zfsvfs, FTAG);
4622
4623 return (error);
4624 }
4625
4626 /*
4627 * inputs:
4628 * zc_name name of filesystem
4629 * zc_cookie zap cursor
4630 * zc_objset_type zfs_userquota_prop_t
4631 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4632 *
4633 * outputs:
4634 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4635 * zc_cookie zap cursor
4636 */
4637 static int
4638 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4639 {
4640 zfsvfs_t *zfsvfs;
4641 int bufsize = zc->zc_nvlist_dst_size;
4642
4643 if (bufsize <= 0)
4644 return (SET_ERROR(ENOMEM));
4645
4646 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4647 if (error != 0)
4648 return (error);
4649
4650 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4651
4652 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4653 buf, &zc->zc_nvlist_dst_size);
4654
4655 if (error == 0) {
4656 error = xcopyout(buf,
4657 (void *)(uintptr_t)zc->zc_nvlist_dst,
4658 zc->zc_nvlist_dst_size);
4659 }
4660 kmem_free(buf, bufsize);
4661 zfsvfs_rele(zfsvfs, FTAG);
4662
4663 return (error);
4664 }
4665
4666 /*
4667 * inputs:
4668 * zc_name name of filesystem
4669 *
4670 * outputs:
4671 * none
4672 */
4673 static int
4674 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4675 {
4676 objset_t *os;
4677 int error = 0;
4678 zfsvfs_t *zfsvfs;
4679
4680 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4681 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4682 /*
4683 * If userused is not enabled, it may be because the
4684 * objset needs to be closed & reopened (to grow the
4685 * objset_phys_t). Suspend/resume the fs will do that.
4686 */
4687 error = zfs_suspend_fs(zfsvfs);
4688 if (error == 0) {
4689 dmu_objset_refresh_ownership(zfsvfs->z_os,
4690 zfsvfs);
4691 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4692 }
4693 }
4694 if (error == 0)
4695 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4696 VFS_RELE(zfsvfs->z_vfs);
4697 } else {
4698 /* XXX kind of reading contents without owning */
4699 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4700 if (error != 0)
4701 return (error);
4702
4703 error = dmu_objset_userspace_upgrade(os);
4704 dmu_objset_rele(os, FTAG);
4705 }
4706
4707 return (error);
4708 }
4709
4710 /*
4711 * We don't want to have a hard dependency
4712 * against some special symbols in sharefs
4713 * nfs, and smbsrv. Determine them if needed when
4714 * the first file system is shared.
4715 * Neither sharefs, nfs or smbsrv are unloadable modules.
4716 */
4717 int (*znfsexport_fs)(void *arg);
4718 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4719 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4720
4721 int zfs_nfsshare_inited;
4722 int zfs_smbshare_inited;
4723
4724 ddi_modhandle_t nfs_mod;
4725 ddi_modhandle_t sharefs_mod;
4726 ddi_modhandle_t smbsrv_mod;
4727 kmutex_t zfs_share_lock;
4728
4729 static int
4730 zfs_init_sharefs()
4731 {
4732 int error;
4733
4734 ASSERT(MUTEX_HELD(&zfs_share_lock));
4735 /* Both NFS and SMB shares also require sharetab support. */
4736 if (sharefs_mod == NULL && ((sharefs_mod =
4737 ddi_modopen("fs/sharefs",
4738 KRTLD_MODE_FIRST, &error)) == NULL)) {
4739 return (SET_ERROR(ENOSYS));
4740 }
4741 if (zshare_fs == NULL && ((zshare_fs =
4742 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4743 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4744 return (SET_ERROR(ENOSYS));
4745 }
4746 return (0);
4747 }
4748
4749 static int
4750 zfs_ioc_share(zfs_cmd_t *zc)
4751 {
4752 int error;
4753 int opcode;
4754
4755 switch (zc->zc_share.z_sharetype) {
4756 case ZFS_SHARE_NFS:
4757 case ZFS_UNSHARE_NFS:
4758 if (zfs_nfsshare_inited == 0) {
4759 mutex_enter(&zfs_share_lock);
4760 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4761 KRTLD_MODE_FIRST, &error)) == NULL)) {
4762 mutex_exit(&zfs_share_lock);
4763 return (SET_ERROR(ENOSYS));
4764 }
4765 if (znfsexport_fs == NULL &&
4766 ((znfsexport_fs = (int (*)(void *))
4767 ddi_modsym(nfs_mod,
4768 "nfs_export", &error)) == NULL)) {
4769 mutex_exit(&zfs_share_lock);
4770 return (SET_ERROR(ENOSYS));
4771 }
4772 error = zfs_init_sharefs();
4773 if (error != 0) {
4774 mutex_exit(&zfs_share_lock);
4775 return (SET_ERROR(ENOSYS));
4776 }
4777 zfs_nfsshare_inited = 1;
4778 mutex_exit(&zfs_share_lock);
4779 }
4780 break;
4781 case ZFS_SHARE_SMB:
4782 case ZFS_UNSHARE_SMB:
4783 if (zfs_smbshare_inited == 0) {
4784 mutex_enter(&zfs_share_lock);
4785 if (smbsrv_mod == NULL && ((smbsrv_mod =
4786 ddi_modopen("drv/smbsrv",
4787 KRTLD_MODE_FIRST, &error)) == NULL)) {
4788 mutex_exit(&zfs_share_lock);
4789 return (SET_ERROR(ENOSYS));
4790 }
4791 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4792 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4793 "smb_server_share", &error)) == NULL)) {
4794 mutex_exit(&zfs_share_lock);
4795 return (SET_ERROR(ENOSYS));
4796 }
4797 error = zfs_init_sharefs();
4798 if (error != 0) {
4799 mutex_exit(&zfs_share_lock);
4800 return (SET_ERROR(ENOSYS));
4801 }
4802 zfs_smbshare_inited = 1;
4803 mutex_exit(&zfs_share_lock);
4804 }
4805 break;
4806 default:
4807 return (SET_ERROR(EINVAL));
4808 }
4809
4810 switch (zc->zc_share.z_sharetype) {
4811 case ZFS_SHARE_NFS:
4812 case ZFS_UNSHARE_NFS:
4813 if (error =
4814 znfsexport_fs((void *)
4815 (uintptr_t)zc->zc_share.z_exportdata))
4816 return (error);
4817 break;
4818 case ZFS_SHARE_SMB:
4819 case ZFS_UNSHARE_SMB:
4820 if (error = zsmbexport_fs((void *)
4821 (uintptr_t)zc->zc_share.z_exportdata,
4822 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4823 B_TRUE: B_FALSE)) {
4824 return (error);
4825 }
4826 break;
4827 }
4828
4829 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4830 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4831 SHAREFS_ADD : SHAREFS_REMOVE;
4832
4833 /*
4834 * Add or remove share from sharetab
4835 */
4836 error = zshare_fs(opcode,
4837 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4838 zc->zc_share.z_sharemax);
4839
4840 return (error);
4841
4842 }
4843
4844 ace_t full_access[] = {
4845 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4846 };
4847
4848 /*
4849 * inputs:
4850 * zc_name name of containing filesystem
4851 * zc_obj object # beyond which we want next in-use object #
4852 *
4853 * outputs:
4854 * zc_obj next in-use object #
4855 */
4856 static int
4857 zfs_ioc_next_obj(zfs_cmd_t *zc)
4858 {
4859 objset_t *os = NULL;
4860 int error;
4861
4862 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4863 if (error != 0)
4864 return (error);
4865
4866 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4867 os->os_dsl_dataset->ds_phys->ds_prev_snap_txg);
4868
4869 dmu_objset_rele(os, FTAG);
4870 return (error);
4871 }
4872
4873 /*
4874 * inputs:
4875 * zc_name name of filesystem
4876 * zc_value prefix name for snapshot
4877 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
4878 *
4879 * outputs:
4880 * zc_value short name of new snapshot
4881 */
4882 static int
4883 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
4884 {
4885 char *snap_name;
4886 char *hold_name;
4887 int error;
4888 minor_t minor;
4889
4890 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
4891 if (error != 0)
4892 return (error);
4893
4894 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
4895 (u_longlong_t)ddi_get_lbolt64());
4896 hold_name = kmem_asprintf("%%%s", zc->zc_value);
4897
4898 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
4899 hold_name);
4900 if (error == 0)
4901 (void) strcpy(zc->zc_value, snap_name);
4902 strfree(snap_name);
4903 strfree(hold_name);
4904 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
4905 return (error);
4906 }
4907
4908 /*
4909 * inputs:
4910 * zc_name name of "to" snapshot
4911 * zc_value name of "from" snapshot
4912 * zc_cookie file descriptor to write diff data on
4913 *
4914 * outputs:
4915 * dmu_diff_record_t's to the file descriptor
4916 */
4917 static int
4918 zfs_ioc_diff(zfs_cmd_t *zc)
4919 {
4920 file_t *fp;
4921 offset_t off;
4922 int error;
4923
4924 fp = getf(zc->zc_cookie);
4925 if (fp == NULL)
4926 return (SET_ERROR(EBADF));
4927
4928 off = fp->f_offset;
4929
4930 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
4931
4932 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4933 fp->f_offset = off;
4934 releasef(zc->zc_cookie);
4935
4936 return (error);
4937 }
4938
4939 /*
4940 * Remove all ACL files in shares dir
4941 */
4942 static int
4943 zfs_smb_acl_purge(znode_t *dzp)
4944 {
4945 zap_cursor_t zc;
4946 zap_attribute_t zap;
4947 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
4948 int error;
4949
4950 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
4951 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
4952 zap_cursor_advance(&zc)) {
4953 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
4954 NULL, 0)) != 0)
4955 break;
4956 }
4957 zap_cursor_fini(&zc);
4958 return (error);
4959 }
4960
4961 static int
4962 zfs_ioc_smb_acl(zfs_cmd_t *zc)
4963 {
4964 vnode_t *vp;
4965 znode_t *dzp;
4966 vnode_t *resourcevp = NULL;
4967 znode_t *sharedir;
4968 zfsvfs_t *zfsvfs;
4969 nvlist_t *nvlist;
4970 char *src, *target;
4971 vattr_t vattr;
4972 vsecattr_t vsec;
4973 int error = 0;
4974
4975 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
4976 NO_FOLLOW, NULL, &vp)) != 0)
4977 return (error);
4978
4979 /* Now make sure mntpnt and dataset are ZFS */
4980
4981 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
4982 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
4983 zc->zc_name) != 0)) {
4984 VN_RELE(vp);
4985 return (SET_ERROR(EINVAL));
4986 }
4987
4988 dzp = VTOZ(vp);
4989 zfsvfs = dzp->z_zfsvfs;
4990 ZFS_ENTER(zfsvfs);
4991
4992 /*
4993 * Create share dir if its missing.
4994 */
4995 mutex_enter(&zfsvfs->z_lock);
4996 if (zfsvfs->z_shares_dir == 0) {
4997 dmu_tx_t *tx;
4998
4999 tx = dmu_tx_create(zfsvfs->z_os);
5000 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
5001 ZFS_SHARES_DIR);
5002 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
5003 error = dmu_tx_assign(tx, TXG_WAIT);
5004 if (error != 0) {
5005 dmu_tx_abort(tx);
5006 } else {
5007 error = zfs_create_share_dir(zfsvfs, tx);
5008 dmu_tx_commit(tx);
5009 }
5010 if (error != 0) {
5011 mutex_exit(&zfsvfs->z_lock);
5012 VN_RELE(vp);
5013 ZFS_EXIT(zfsvfs);
5014 return (error);
5015 }
5016 }
5017 mutex_exit(&zfsvfs->z_lock);
5018
5019 ASSERT(zfsvfs->z_shares_dir);
5020 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
5021 VN_RELE(vp);
5022 ZFS_EXIT(zfsvfs);
5023 return (error);
5024 }
5025
5026 switch (zc->zc_cookie) {
5027 case ZFS_SMB_ACL_ADD:
5028 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
5029 vattr.va_type = VREG;
5030 vattr.va_mode = S_IFREG|0777;
5031 vattr.va_uid = 0;
5032 vattr.va_gid = 0;
5033
5034 vsec.vsa_mask = VSA_ACE;
5035 vsec.vsa_aclentp = &full_access;
5036 vsec.vsa_aclentsz = sizeof (full_access);
5037 vsec.vsa_aclcnt = 1;
5038
5039 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
5040 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
5041 if (resourcevp)
5042 VN_RELE(resourcevp);
5043 break;
5044
5045 case ZFS_SMB_ACL_REMOVE:
5046 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
5047 NULL, 0);
5048 break;
5049
5050 case ZFS_SMB_ACL_RENAME:
5051 if ((error = get_nvlist(zc->zc_nvlist_src,
5052 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
5053 VN_RELE(vp);
5054 ZFS_EXIT(zfsvfs);
5055 return (error);
5056 }
5057 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
5058 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
5059 &target)) {
5060 VN_RELE(vp);
5061 VN_RELE(ZTOV(sharedir));
5062 ZFS_EXIT(zfsvfs);
5063 nvlist_free(nvlist);
5064 return (error);
5065 }
5066 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
5067 kcred, NULL, 0);
5068 nvlist_free(nvlist);
5069 break;
5070
5071 case ZFS_SMB_ACL_PURGE:
5072 error = zfs_smb_acl_purge(sharedir);
5073 break;
5074
5075 default:
5076 error = SET_ERROR(EINVAL);
5077 break;
5078 }
5079
5080 VN_RELE(vp);
5081 VN_RELE(ZTOV(sharedir));
5082
5083 ZFS_EXIT(zfsvfs);
5084
5085 return (error);
5086 }
5087
5088 /*
5089 * innvl: {
5090 * "holds" -> { snapname -> holdname (string), ... }
5091 * (optional) "cleanup_fd" -> fd (int32)
5092 * }
5093 *
5094 * outnvl: {
5095 * snapname -> error value (int32)
5096 * ...
5097 * }
5098 */
5099 /* ARGSUSED */
5100 static int
5101 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
5102 {
5103 nvlist_t *holds;
5104 int cleanup_fd = -1;
5105 int error;
5106 minor_t minor = 0;
5107
5108 error = nvlist_lookup_nvlist(args, "holds", &holds);
5109 if (error != 0)
5110 return (SET_ERROR(EINVAL));
5111
5112 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
5113 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
5114 if (error != 0)
5115 return (error);
5116 }
5117
5118 error = dsl_dataset_user_hold(holds, minor, errlist);
5119 if (minor != 0)
5120 zfs_onexit_fd_rele(cleanup_fd);
5121 return (error);
5122 }
5123
5124 /*
5125 * innvl is not used.
5126 *
5127 * outnvl: {
5128 * holdname -> time added (uint64 seconds since epoch)
5129 * ...
5130 * }
5131 */
5132 /* ARGSUSED */
5133 static int
5134 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
5135 {
5136 return (dsl_dataset_get_holds(snapname, outnvl));
5137 }
5138
5139 /*
5140 * innvl: {
5141 * snapname -> { holdname, ... }
5142 * ...
5143 * }
5144 *
5145 * outnvl: {
5146 * snapname -> error value (int32)
5147 * ...
5148 * }
5149 */
5150 /* ARGSUSED */
5151 static int
5152 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
5153 {
5154 return (dsl_dataset_user_release(holds, errlist));
5155 }
5156
5157 /*
5158 * inputs:
5159 * zc_name name of new filesystem or snapshot
5160 * zc_value full name of old snapshot
5161 *
5162 * outputs:
5163 * zc_cookie space in bytes
5164 * zc_objset_type compressed space in bytes
5165 * zc_perm_action uncompressed space in bytes
5166 */
5167 static int
5168 zfs_ioc_space_written(zfs_cmd_t *zc)
5169 {
5170 int error;
5171 dsl_pool_t *dp;
5172 dsl_dataset_t *new, *old;
5173
5174 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5175 if (error != 0)
5176 return (error);
5177 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5178 if (error != 0) {
5179 dsl_pool_rele(dp, FTAG);
5180 return (error);
5181 }
5182 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5183 if (error != 0) {
5184 dsl_dataset_rele(new, FTAG);
5185 dsl_pool_rele(dp, FTAG);
5186 return (error);
5187 }
5188
5189 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5190 &zc->zc_objset_type, &zc->zc_perm_action);
5191 dsl_dataset_rele(old, FTAG);
5192 dsl_dataset_rele(new, FTAG);
5193 dsl_pool_rele(dp, FTAG);
5194 return (error);
5195 }
5196
5197 /*
5198 * innvl: {
5199 * "firstsnap" -> snapshot name
5200 * }
5201 *
5202 * outnvl: {
5203 * "used" -> space in bytes
5204 * "compressed" -> compressed space in bytes
5205 * "uncompressed" -> uncompressed space in bytes
5206 * }
5207 */
5208 static int
5209 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5210 {
5211 int error;
5212 dsl_pool_t *dp;
5213 dsl_dataset_t *new, *old;
5214 char *firstsnap;
5215 uint64_t used, comp, uncomp;
5216
5217 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5218 return (SET_ERROR(EINVAL));
5219
5220 error = dsl_pool_hold(lastsnap, FTAG, &dp);
5221 if (error != 0)
5222 return (error);
5223
5224 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5225 if (error != 0) {
5226 dsl_pool_rele(dp, FTAG);
5227 return (error);
5228 }
5229 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5230 if (error != 0) {
5231 dsl_dataset_rele(new, FTAG);
5232 dsl_pool_rele(dp, FTAG);
5233 return (error);
5234 }
5235
5236 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5237 dsl_dataset_rele(old, FTAG);
5238 dsl_dataset_rele(new, FTAG);
5239 dsl_pool_rele(dp, FTAG);
5240 fnvlist_add_uint64(outnvl, "used", used);
5241 fnvlist_add_uint64(outnvl, "compressed", comp);
5242 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5243 return (error);
5244 }
5245
5246 /*
5247 * innvl: {
5248 * "fd" -> file descriptor to write stream to (int32)
5249 * (optional) "fromsnap" -> full snap name to send an incremental from
5250 * }
5251 *
5252 * outnvl is unused
5253 */
5254 /* ARGSUSED */
5255 static int
5256 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5257 {
5258 int error;
5259 offset_t off;
5260 char *fromname = NULL;
5261 int fd;
5262
5263 error = nvlist_lookup_int32(innvl, "fd", &fd);
5264 if (error != 0)
5265 return (SET_ERROR(EINVAL));
5266
5267 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5268
5269 file_t *fp = getf(fd);
5270 if (fp == NULL)
5271 return (SET_ERROR(EBADF));
5272
5273 off = fp->f_offset;
5274 error = dmu_send(snapname, fromname, fd, fp->f_vnode, &off);
5275
5276 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5277 fp->f_offset = off;
5278 releasef(fd);
5279 return (error);
5280 }
5281
5282 /*
5283 * Determine approximately how large a zfs send stream will be -- the number
5284 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5285 *
5286 * innvl: {
5287 * (optional) "fromsnap" -> full snap name to send an incremental from
5288 * }
5289 *
5290 * outnvl: {
5291 * "space" -> bytes of space (uint64)
5292 * }
5293 */
5294 static int
5295 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5296 {
5297 dsl_pool_t *dp;
5298 dsl_dataset_t *fromsnap = NULL;
5299 dsl_dataset_t *tosnap;
5300 int error;
5301 char *fromname;
5302 uint64_t space;
5303
5304 error = dsl_pool_hold(snapname, FTAG, &dp);
5305 if (error != 0)
5306 return (error);
5307
5308 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5309 if (error != 0) {
5310 dsl_pool_rele(dp, FTAG);
5311 return (error);
5312 }
5313
5314 error = nvlist_lookup_string(innvl, "fromsnap", &fromname);
5315 if (error == 0) {
5316 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5317 if (error != 0) {
5318 dsl_dataset_rele(tosnap, FTAG);
5319 dsl_pool_rele(dp, FTAG);
5320 return (error);
5321 }
5322 }
5323
5324 error = dmu_send_estimate(tosnap, fromsnap, &space);
5325 fnvlist_add_uint64(outnvl, "space", space);
5326
5327 if (fromsnap != NULL)
5328 dsl_dataset_rele(fromsnap, FTAG);
5329 dsl_dataset_rele(tosnap, FTAG);
5330 dsl_pool_rele(dp, FTAG);
5331 return (error);
5332 }
5333
5334
5335 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5336
5337 static void
5338 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5339 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5340 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5341 {
5342 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5343
5344 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5345 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5346 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5347 ASSERT3P(vec->zvec_func, ==, NULL);
5348
5349 vec->zvec_legacy_func = func;
5350 vec->zvec_secpolicy = secpolicy;
5351 vec->zvec_namecheck = namecheck;
5352 vec->zvec_allow_log = log_history;
5353 vec->zvec_pool_check = pool_check;
5354 }
5355
5356 /*
5357 * See the block comment at the beginning of this file for details on
5358 * each argument to this function.
5359 */
5360 static void
5361 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5362 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5363 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5364 boolean_t allow_log)
5365 {
5366 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5367
5368 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5369 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5370 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5371 ASSERT3P(vec->zvec_func, ==, NULL);
5372
5373 /* if we are logging, the name must be valid */
5374 ASSERT(!allow_log || namecheck != NO_NAME);
5375
5376 vec->zvec_name = name;
5377 vec->zvec_func = func;
5378 vec->zvec_secpolicy = secpolicy;
5379 vec->zvec_namecheck = namecheck;
5380 vec->zvec_pool_check = pool_check;
5381 vec->zvec_smush_outnvlist = smush_outnvlist;
5382 vec->zvec_allow_log = allow_log;
5383 }
5384
5385 static void
5386 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5387 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5388 zfs_ioc_poolcheck_t pool_check)
5389 {
5390 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5391 POOL_NAME, log_history, pool_check);
5392 }
5393
5394 static void
5395 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5396 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5397 {
5398 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5399 DATASET_NAME, B_FALSE, pool_check);
5400 }
5401
5402 static void
5403 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5404 {
5405 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5406 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5407 }
5408
5409 static void
5410 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5411 zfs_secpolicy_func_t *secpolicy)
5412 {
5413 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5414 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5415 }
5416
5417 static void
5418 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5419 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5420 {
5421 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5422 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5423 }
5424
5425 static void
5426 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5427 {
5428 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5429 zfs_secpolicy_read);
5430 }
5431
5432 static void
5433 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5434 zfs_secpolicy_func_t *secpolicy)
5435 {
5436 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5437 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5438 }
5439
5440 static void
5441 zfs_ioctl_init(void)
5442 {
5443 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5444 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5445 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5446
5447 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5448 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5449 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5450
5451 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5452 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5453 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5454
5455 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5456 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5457 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5458
5459 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5460 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5461 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5462
5463 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5464 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5465 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5466
5467 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5468 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5469 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5470
5471 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5472 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5473 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5474
5475 zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5476 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5477 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5478 zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5479 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5480 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5481
5482 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5483 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5484 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5485
5486 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
5487 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
5488 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5489
5490 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK,
5491 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME,
5492 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5493
5494 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS,
5495 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME,
5496 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5497
5498 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS,
5499 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks,
5500 POOL_NAME,
5501 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5502
5503 /* IOCTLS that use the legacy function signature */
5504
5505 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5506 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5507
5508 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5509 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5510 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5511 zfs_ioc_pool_scan);
5512 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5513 zfs_ioc_pool_upgrade);
5514 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5515 zfs_ioc_vdev_add);
5516 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5517 zfs_ioc_vdev_remove);
5518 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5519 zfs_ioc_vdev_set_state);
5520 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5521 zfs_ioc_vdev_attach);
5522 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5523 zfs_ioc_vdev_detach);
5524 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5525 zfs_ioc_vdev_setpath);
5526 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5527 zfs_ioc_vdev_setfru);
5528 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5529 zfs_ioc_pool_set_props);
5530 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5531 zfs_ioc_vdev_split);
5532 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5533 zfs_ioc_pool_reguid);
5534
5535 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5536 zfs_ioc_pool_configs, zfs_secpolicy_none);
5537 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5538 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5539 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5540 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5541 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5542 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5543 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5544 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5545
5546 /*
5547 * pool destroy, and export don't log the history as part of
5548 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5549 * does the logging of those commands.
5550 */
5551 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5552 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5553 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5554 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5555
5556 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5557 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5558 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5559 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5560
5561 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5562 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5563 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5564 zfs_ioc_dsobj_to_dsname,
5565 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5566 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5567 zfs_ioc_pool_get_history,
5568 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5569
5570 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5571 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5572
5573 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5574 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5575 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5576 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5577
5578 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5579 zfs_ioc_space_written);
5580 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5581 zfs_ioc_objset_recvd_props);
5582 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5583 zfs_ioc_next_obj);
5584 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5585 zfs_ioc_get_fsacl);
5586 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5587 zfs_ioc_objset_stats);
5588 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5589 zfs_ioc_objset_zplprops);
5590 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5591 zfs_ioc_dataset_list_next);
5592 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5593 zfs_ioc_snapshot_list_next);
5594 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5595 zfs_ioc_send_progress);
5596
5597 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5598 zfs_ioc_diff, zfs_secpolicy_diff);
5599 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5600 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5601 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5602 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5603 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5604 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5605 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5606 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5607 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5608 zfs_ioc_send, zfs_secpolicy_send);
5609
5610 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5611 zfs_secpolicy_none);
5612 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5613 zfs_secpolicy_destroy);
5614 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5615 zfs_secpolicy_rename);
5616 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5617 zfs_secpolicy_recv);
5618 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5619 zfs_secpolicy_promote);
5620 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5621 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5622 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5623 zfs_secpolicy_set_fsacl);
5624
5625 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5626 zfs_secpolicy_share, POOL_CHECK_NONE);
5627 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5628 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5629 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5630 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5631 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5632 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5633 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5634 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5635 }
5636
5637 int
5638 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5639 zfs_ioc_poolcheck_t check)
5640 {
5641 spa_t *spa;
5642 int error;
5643
5644 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5645
5646 if (check & POOL_CHECK_NONE)
5647 return (0);
5648
5649 error = spa_open(name, &spa, FTAG);
5650 if (error == 0) {
5651 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5652 error = SET_ERROR(EAGAIN);
5653 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5654 error = SET_ERROR(EROFS);
5655 spa_close(spa, FTAG);
5656 }
5657 return (error);
5658 }
5659
5660 /*
5661 * Find a free minor number.
5662 */
5663 minor_t
5664 zfsdev_minor_alloc(void)
5665 {
5666 static minor_t last_minor;
5667 minor_t m;
5668
5669 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5670
5671 for (m = last_minor + 1; m != last_minor; m++) {
5672 if (m > ZFSDEV_MAX_MINOR)
5673 m = 1;
5674 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5675 last_minor = m;
5676 return (m);
5677 }
5678 }
5679
5680 return (0);
5681 }
5682
5683 static int
5684 zfs_ctldev_init(dev_t *devp)
5685 {
5686 minor_t minor;
5687 zfs_soft_state_t *zs;
5688
5689 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5690 ASSERT(getminor(*devp) == 0);
5691
5692 minor = zfsdev_minor_alloc();
5693 if (minor == 0)
5694 return (SET_ERROR(ENXIO));
5695
5696 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5697 return (SET_ERROR(EAGAIN));
5698
5699 *devp = makedevice(getemajor(*devp), minor);
5700
5701 zs = ddi_get_soft_state(zfsdev_state, minor);
5702 zs->zss_type = ZSST_CTLDEV;
5703 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5704
5705 return (0);
5706 }
5707
5708 static void
5709 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5710 {
5711 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5712
5713 zfs_onexit_destroy(zo);
5714 ddi_soft_state_free(zfsdev_state, minor);
5715 }
5716
5717 void *
5718 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5719 {
5720 zfs_soft_state_t *zp;
5721
5722 zp = ddi_get_soft_state(zfsdev_state, minor);
5723 if (zp == NULL || zp->zss_type != which)
5724 return (NULL);
5725
5726 return (zp->zss_data);
5727 }
5728
5729 static int
5730 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5731 {
5732 int error = 0;
5733
5734 if (getminor(*devp) != 0)
5735 return (zvol_open(devp, flag, otyp, cr));
5736
5737 /* This is the control device. Allocate a new minor if requested. */
5738 if (flag & FEXCL) {
5739 mutex_enter(&zfsdev_state_lock);
5740 error = zfs_ctldev_init(devp);
5741 mutex_exit(&zfsdev_state_lock);
5742 }
5743
5744 return (error);
5745 }
5746
5747 static int
5748 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5749 {
5750 zfs_onexit_t *zo;
5751 minor_t minor = getminor(dev);
5752
5753 if (minor == 0)
5754 return (0);
5755
5756 mutex_enter(&zfsdev_state_lock);
5757 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5758 if (zo == NULL) {
5759 mutex_exit(&zfsdev_state_lock);
5760 return (zvol_close(dev, flag, otyp, cr));
5761 }
5762 zfs_ctldev_destroy(zo, minor);
5763 mutex_exit(&zfsdev_state_lock);
5764
5765 return (0);
5766 }
5767
5768 static int
5769 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5770 {
5771 zfs_cmd_t *zc;
5772 uint_t vecnum;
5773 int error, rc, len;
5774 minor_t minor = getminor(dev);
5775 const zfs_ioc_vec_t *vec;
5776 char *saved_poolname = NULL;
5777 nvlist_t *innvl = NULL;
5778
5779 if (minor != 0 &&
5780 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5781 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5782
5783 vecnum = cmd - ZFS_IOC_FIRST;
5784 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5785
5786 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5787 return (SET_ERROR(EINVAL));
5788 vec = &zfs_ioc_vec[vecnum];
5789
5790 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5791
5792 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5793 if (error != 0) {
5794 error = SET_ERROR(EFAULT);
5795 goto out;
5796 }
5797
5798 zc->zc_iflags = flag & FKIOCTL;
5799 if (zc->zc_nvlist_src_size != 0) {
5800 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5801 zc->zc_iflags, &innvl);
5802 if (error != 0)
5803 goto out;
5804 }
5805
5806 /*
5807 * Ensure that all pool/dataset names are valid before we pass down to
5808 * the lower layers.
5809 */
5810 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
5811 switch (vec->zvec_namecheck) {
5812 case POOL_NAME:
5813 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
5814 error = SET_ERROR(EINVAL);
5815 else
5816 error = pool_status_check(zc->zc_name,
5817 vec->zvec_namecheck, vec->zvec_pool_check);
5818 break;
5819
5820 case DATASET_NAME:
5821 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
5822 error = SET_ERROR(EINVAL);
5823 else
5824 error = pool_status_check(zc->zc_name,
5825 vec->zvec_namecheck, vec->zvec_pool_check);
5826 break;
5827
5828 case NO_NAME:
5829 break;
5830 }
5831
5832
5833 if (error == 0 && !(flag & FKIOCTL))
5834 error = vec->zvec_secpolicy(zc, innvl, cr);
5835
5836 if (error != 0)
5837 goto out;
5838
5839 /* legacy ioctls can modify zc_name */
5840 len = strcspn(zc->zc_name, "/@#") + 1;
5841 saved_poolname = kmem_alloc(len, KM_SLEEP);
5842 (void) strlcpy(saved_poolname, zc->zc_name, len);
5843
5844 if (vec->zvec_func != NULL) {
5845 nvlist_t *outnvl;
5846 int puterror = 0;
5847 spa_t *spa;
5848 nvlist_t *lognv = NULL;
5849
5850 ASSERT(vec->zvec_legacy_func == NULL);
5851
5852 /*
5853 * Add the innvl to the lognv before calling the func,
5854 * in case the func changes the innvl.
5855 */
5856 if (vec->zvec_allow_log) {
5857 lognv = fnvlist_alloc();
5858 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
5859 vec->zvec_name);
5860 if (!nvlist_empty(innvl)) {
5861 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
5862 innvl);
5863 }
5864 }
5865
5866 outnvl = fnvlist_alloc();
5867 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
5868
5869 if (error == 0 && vec->zvec_allow_log &&
5870 spa_open(zc->zc_name, &spa, FTAG) == 0) {
5871 if (!nvlist_empty(outnvl)) {
5872 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
5873 outnvl);
5874 }
5875 (void) spa_history_log_nvl(spa, lognv);
5876 spa_close(spa, FTAG);
5877 }
5878 fnvlist_free(lognv);
5879
5880 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
5881 int smusherror = 0;
5882 if (vec->zvec_smush_outnvlist) {
5883 smusherror = nvlist_smush(outnvl,
5884 zc->zc_nvlist_dst_size);
5885 }
5886 if (smusherror == 0)
5887 puterror = put_nvlist(zc, outnvl);
5888 }
5889
5890 if (puterror != 0)
5891 error = puterror;
5892
5893 nvlist_free(outnvl);
5894 } else {
5895 error = vec->zvec_legacy_func(zc);
5896 }
5897
5898 out:
5899 nvlist_free(innvl);
5900 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
5901 if (error == 0 && rc != 0)
5902 error = SET_ERROR(EFAULT);
5903 if (error == 0 && vec->zvec_allow_log) {
5904 char *s = tsd_get(zfs_allow_log_key);
5905 if (s != NULL)
5906 strfree(s);
5907 (void) tsd_set(zfs_allow_log_key, saved_poolname);
5908 } else {
5909 if (saved_poolname != NULL)
5910 strfree(saved_poolname);
5911 }
5912
5913 kmem_free(zc, sizeof (zfs_cmd_t));
5914 return (error);
5915 }
5916
5917 static int
5918 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
5919 {
5920 if (cmd != DDI_ATTACH)
5921 return (DDI_FAILURE);
5922
5923 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
5924 DDI_PSEUDO, 0) == DDI_FAILURE)
5925 return (DDI_FAILURE);
5926
5927 zfs_dip = dip;
5928
5929 ddi_report_dev(dip);
5930
5931 return (DDI_SUCCESS);
5932 }
5933
5934 static int
5935 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
5936 {
5937 if (spa_busy() || zfs_busy() || zvol_busy())
5938 return (DDI_FAILURE);
5939
5940 if (cmd != DDI_DETACH)
5941 return (DDI_FAILURE);
5942
5943 zfs_dip = NULL;
5944
5945 ddi_prop_remove_all(dip);
5946 ddi_remove_minor_node(dip, NULL);
5947
5948 return (DDI_SUCCESS);
5949 }
5950
5951 /*ARGSUSED*/
5952 static int
5953 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
5954 {
5955 switch (infocmd) {
5956 case DDI_INFO_DEVT2DEVINFO:
5957 *result = zfs_dip;
5958 return (DDI_SUCCESS);
5959
5960 case DDI_INFO_DEVT2INSTANCE:
5961 *result = (void *)0;
5962 return (DDI_SUCCESS);
5963 }
5964
5965 return (DDI_FAILURE);
5966 }
5967
5968 /*
5969 * OK, so this is a little weird.
5970 *
5971 * /dev/zfs is the control node, i.e. minor 0.
5972 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
5973 *
5974 * /dev/zfs has basically nothing to do except serve up ioctls,
5975 * so most of the standard driver entry points are in zvol.c.
5976 */
5977 static struct cb_ops zfs_cb_ops = {
5978 zfsdev_open, /* open */
5979 zfsdev_close, /* close */
5980 zvol_strategy, /* strategy */
5981 nodev, /* print */
5982 zvol_dump, /* dump */
5983 zvol_read, /* read */
5984 zvol_write, /* write */
5985 zfsdev_ioctl, /* ioctl */
5986 nodev, /* devmap */
5987 nodev, /* mmap */
5988 nodev, /* segmap */
5989 nochpoll, /* poll */
5990 ddi_prop_op, /* prop_op */
5991 NULL, /* streamtab */
5992 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
5993 CB_REV, /* version */
5994 nodev, /* async read */
5995 nodev, /* async write */
5996 };
5997
5998 static struct dev_ops zfs_dev_ops = {
5999 DEVO_REV, /* version */
6000 0, /* refcnt */
6001 zfs_info, /* info */
6002 nulldev, /* identify */
6003 nulldev, /* probe */
6004 zfs_attach, /* attach */
6005 zfs_detach, /* detach */
6006 nodev, /* reset */
6007 &zfs_cb_ops, /* driver operations */
6008 NULL, /* no bus operations */
6009 NULL, /* power */
6010 ddi_quiesce_not_needed, /* quiesce */
6011 };
6012
6013 static struct modldrv zfs_modldrv = {
6014 &mod_driverops,
6015 "ZFS storage pool",
6016 &zfs_dev_ops
6017 };
6018
6019 static struct modlinkage modlinkage = {
6020 MODREV_1,
6021 (void *)&zfs_modlfs,
6022 (void *)&zfs_modldrv,
6023 NULL
6024 };
6025
6026 static void
6027 zfs_allow_log_destroy(void *arg)
6028 {
6029 char *poolname = arg;
6030 strfree(poolname);
6031 }
6032
6033 int
6034 _init(void)
6035 {
6036 int error;
6037
6038 spa_init(FREAD | FWRITE);
6039 zfs_init();
6040 zvol_init();
6041 zfs_ioctl_init();
6042
6043 if ((error = mod_install(&modlinkage)) != 0) {
6044 zvol_fini();
6045 zfs_fini();
6046 spa_fini();
6047 return (error);
6048 }
6049
6050 tsd_create(&zfs_fsyncer_key, NULL);
6051 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
6052 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
6053
6054 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
6055 ASSERT(error == 0);
6056 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
6057
6058 return (0);
6059 }
6060
6061 int
6062 _fini(void)
6063 {
6064 int error;
6065
6066 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
6067 return (SET_ERROR(EBUSY));
6068
6069 if ((error = mod_remove(&modlinkage)) != 0)
6070 return (error);
6071
6072 zvol_fini();
6073 zfs_fini();
6074 spa_fini();
6075 if (zfs_nfsshare_inited)
6076 (void) ddi_modclose(nfs_mod);
6077 if (zfs_smbshare_inited)
6078 (void) ddi_modclose(smbsrv_mod);
6079 if (zfs_nfsshare_inited || zfs_smbshare_inited)
6080 (void) ddi_modclose(sharefs_mod);
6081
6082 tsd_destroy(&zfs_fsyncer_key);
6083 ldi_ident_release(zfs_li);
6084 zfs_li = NULL;
6085 mutex_destroy(&zfs_share_lock);
6086
6087 return (error);
6088 }
6089
6090 int
6091 _info(struct modinfo *modinfop)
6092 {
6093 return (mod_info(&modlinkage, modinfop));
6094 }