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