1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Portions Copyright 2011 Martin Matuska
25 * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved.
26 * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
27 * Copyright (c) 2014, Joyent, Inc. All rights reserved.
28 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
29 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
30 * Copyright (c) 2013 Steven Hartland. All rights reserved.
31 * Copyright (c) 2014 Integros [integros.com]
32 */
33
34 /*
35 * ZFS ioctls.
36 *
37 * This file handles the ioctls to /dev/zfs, used for configuring ZFS storage
38 * pools and filesystems, e.g. with /sbin/zfs and /sbin/zpool.
39 *
40 * There are two ways that we handle ioctls: the legacy way where almost
41 * all of the logic is in the ioctl callback, and the new way where most
42 * of the marshalling is handled in the common entry point, zfsdev_ioctl().
43 *
44 * Non-legacy ioctls should be registered by calling
45 * zfs_ioctl_register() from zfs_ioctl_init(). The ioctl is invoked
46 * from userland by lzc_ioctl().
47 *
48 * The registration arguments are as follows:
49 *
50 * const char *name
51 * The name of the ioctl. This is used for history logging. If the
52 * ioctl returns successfully (the callback returns 0), and allow_log
53 * is true, then a history log entry will be recorded with the input &
54 * output nvlists. The log entry can be printed with "zpool history -i".
55 *
56 * zfs_ioc_t ioc
57 * The ioctl request number, which userland will pass to ioctl(2).
58 * The ioctl numbers can change from release to release, because
59 * the caller (libzfs) must be matched to the kernel.
60 *
61 * zfs_secpolicy_func_t *secpolicy
62 * This function will be called before the zfs_ioc_func_t, to
63 * determine if this operation is permitted. It should return EPERM
64 * on failure, and 0 on success. Checks include determining if the
65 * dataset is visible in this zone, and if the user has either all
66 * zfs privileges in the zone (SYS_MOUNT), or has been granted permission
67 * to do this operation on this dataset with "zfs allow".
68 *
69 * zfs_ioc_namecheck_t namecheck
70 * This specifies what to expect in the zfs_cmd_t:zc_name -- a pool
71 * name, a dataset name, or nothing. If the name is not well-formed,
72 * the ioctl will fail and the callback will not be called.
73 * Therefore, the callback can assume that the name is well-formed
74 * (e.g. is null-terminated, doesn't have more than one '@' character,
75 * doesn't have invalid characters).
76 *
77 * zfs_ioc_poolcheck_t pool_check
78 * This specifies requirements on the pool state. If the pool does
79 * not meet them (is suspended or is readonly), the ioctl will fail
80 * and the callback will not be called. If any checks are specified
81 * (i.e. it is not POOL_CHECK_NONE), namecheck must not be NO_NAME.
82 * Multiple checks can be or-ed together (e.g. POOL_CHECK_SUSPENDED |
83 * POOL_CHECK_READONLY).
84 *
85 * boolean_t smush_outnvlist
86 * If smush_outnvlist is true, then the output is presumed to be a
87 * list of errors, and it will be "smushed" down to fit into the
88 * caller's buffer, by removing some entries and replacing them with a
89 * single "N_MORE_ERRORS" entry indicating how many were removed. See
90 * nvlist_smush() for details. If smush_outnvlist is false, and the
91 * outnvlist does not fit into the userland-provided buffer, then the
92 * ioctl will fail with ENOMEM.
93 *
94 * zfs_ioc_func_t *func
95 * The callback function that will perform the operation.
96 *
97 * The callback should return 0 on success, or an error number on
98 * failure. If the function fails, the userland ioctl will return -1,
99 * and errno will be set to the callback's return value. The callback
100 * will be called with the following arguments:
101 *
102 * const char *name
103 * The name of the pool or dataset to operate on, from
104 * zfs_cmd_t:zc_name. The 'namecheck' argument specifies the
105 * expected type (pool, dataset, or none).
106 *
107 * nvlist_t *innvl
108 * The input nvlist, deserialized from zfs_cmd_t:zc_nvlist_src. Or
109 * NULL if no input nvlist was provided. Changes to this nvlist are
110 * ignored. If the input nvlist could not be deserialized, the
111 * ioctl will fail and the callback will not be called.
112 *
113 * nvlist_t *outnvl
114 * The output nvlist, initially empty. The callback can fill it in,
115 * and it will be returned to userland by serializing it into
116 * zfs_cmd_t:zc_nvlist_dst. If it is non-empty, and serialization
117 * fails (e.g. because the caller didn't supply a large enough
118 * buffer), then the overall ioctl will fail. See the
119 * 'smush_nvlist' argument above for additional behaviors.
120 *
121 * There are two typical uses of the output nvlist:
122 * - To return state, e.g. property values. In this case,
123 * smush_outnvlist should be false. If the buffer was not large
124 * enough, the caller will reallocate a larger buffer and try
125 * the ioctl again.
126 *
127 * - To return multiple errors from an ioctl which makes on-disk
128 * changes. In this case, smush_outnvlist should be true.
129 * Ioctls which make on-disk modifications should generally not
130 * use the outnvl if they succeed, because the caller can not
131 * distinguish between the operation failing, and
132 * deserialization failing.
133 */
134
135 #include <sys/types.h>
136 #include <sys/param.h>
137 #include <sys/errno.h>
138 #include <sys/uio.h>
139 #include <sys/buf.h>
140 #include <sys/modctl.h>
141 #include <sys/open.h>
142 #include <sys/file.h>
143 #include <sys/kmem.h>
144 #include <sys/conf.h>
145 #include <sys/cmn_err.h>
146 #include <sys/stat.h>
147 #include <sys/zfs_ioctl.h>
148 #include <sys/zfs_vfsops.h>
149 #include <sys/zfs_znode.h>
150 #include <sys/zap.h>
151 #include <sys/spa.h>
152 #include <sys/spa_impl.h>
153 #include <sys/vdev.h>
154 #include <sys/priv_impl.h>
155 #include <sys/dmu.h>
156 #include <sys/dsl_dir.h>
157 #include <sys/dsl_dataset.h>
158 #include <sys/dsl_prop.h>
159 #include <sys/dsl_deleg.h>
160 #include <sys/dmu_objset.h>
161 #include <sys/dmu_impl.h>
162 #include <sys/dmu_tx.h>
163 #include <sys/ddi.h>
164 #include <sys/sunddi.h>
165 #include <sys/sunldi.h>
166 #include <sys/policy.h>
167 #include <sys/zone.h>
168 #include <sys/nvpair.h>
169 #include <sys/pathname.h>
170 #include <sys/mount.h>
171 #include <sys/sdt.h>
172 #include <sys/fs/zfs.h>
173 #include <sys/zfs_ctldir.h>
174 #include <sys/zfs_dir.h>
175 #include <sys/zfs_onexit.h>
176 #include <sys/zvol.h>
177 #include <sys/dsl_scan.h>
178 #include <sharefs/share.h>
179 #include <sys/dmu_objset.h>
180 #include <sys/dmu_send.h>
181 #include <sys/dsl_destroy.h>
182 #include <sys/dsl_bookmark.h>
183 #include <sys/dsl_userhold.h>
184 #include <sys/zfeature.h>
185 #include <sys/zio_checksum.h>
186
187 #include "zfs_namecheck.h"
188 #include "zfs_prop.h"
189 #include "zfs_deleg.h"
190 #include "zfs_comutil.h"
191
192 extern struct modlfs zfs_modlfs;
193
194 extern void zfs_init(void);
195 extern void zfs_fini(void);
196
197 ldi_ident_t zfs_li = NULL;
198 dev_info_t *zfs_dip;
199
200 uint_t zfs_fsyncer_key;
201 extern uint_t rrw_tsd_key;
202 static uint_t zfs_allow_log_key;
203
204 typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
205 typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
206 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
207
208 typedef enum {
209 NO_NAME,
210 POOL_NAME,
211 DATASET_NAME
212 } zfs_ioc_namecheck_t;
213
214 typedef enum {
215 POOL_CHECK_NONE = 1 << 0,
216 POOL_CHECK_SUSPENDED = 1 << 1,
217 POOL_CHECK_READONLY = 1 << 2,
218 } zfs_ioc_poolcheck_t;
219
220 typedef struct zfs_ioc_vec {
221 zfs_ioc_legacy_func_t *zvec_legacy_func;
222 zfs_ioc_func_t *zvec_func;
223 zfs_secpolicy_func_t *zvec_secpolicy;
224 zfs_ioc_namecheck_t zvec_namecheck;
225 boolean_t zvec_allow_log;
226 zfs_ioc_poolcheck_t zvec_pool_check;
227 boolean_t zvec_smush_outnvlist;
228 const char *zvec_name;
229 } zfs_ioc_vec_t;
230
231 /* This array is indexed by zfs_userquota_prop_t */
232 static const char *userquota_perms[] = {
233 ZFS_DELEG_PERM_USERUSED,
234 ZFS_DELEG_PERM_USERQUOTA,
235 ZFS_DELEG_PERM_GROUPUSED,
236 ZFS_DELEG_PERM_GROUPQUOTA,
237 };
238
239 static int zfs_ioc_userspace_upgrade(zfs_cmd_t *zc);
240 static int zfs_check_settable(const char *name, nvpair_t *property,
241 cred_t *cr);
242 static int zfs_check_clearable(char *dataset, nvlist_t *props,
243 nvlist_t **errors);
244 static int zfs_fill_zplprops_root(uint64_t, nvlist_t *, nvlist_t *,
245 boolean_t *);
246 int zfs_set_prop_nvlist(const char *, zprop_source_t, nvlist_t *, nvlist_t *);
247 static int get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp);
248
249 static int zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature);
250
251 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
252 void
253 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
254 {
255 const char *newfile;
256 char buf[512];
257 va_list adx;
258
259 /*
260 * Get rid of annoying "../common/" prefix to filename.
261 */
262 newfile = strrchr(file, '/');
263 if (newfile != NULL) {
264 newfile = newfile + 1; /* Get rid of leading / */
265 } else {
266 newfile = file;
267 }
268
269 va_start(adx, fmt);
270 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
271 va_end(adx);
272
273 /*
274 * To get this data, use the zfs-dprintf probe as so:
275 * dtrace -q -n 'zfs-dprintf \
276 * /stringof(arg0) == "dbuf.c"/ \
277 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
278 * arg0 = file name
279 * arg1 = function name
280 * arg2 = line number
281 * arg3 = message
282 */
283 DTRACE_PROBE4(zfs__dprintf,
284 char *, newfile, char *, func, int, line, char *, buf);
285 }
286
287 static void
288 history_str_free(char *buf)
289 {
290 kmem_free(buf, HIS_MAX_RECORD_LEN);
291 }
292
293 static char *
294 history_str_get(zfs_cmd_t *zc)
295 {
296 char *buf;
297
298 if (zc->zc_history == NULL)
299 return (NULL);
300
301 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
302 if (copyinstr((void *)(uintptr_t)zc->zc_history,
303 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
304 history_str_free(buf);
305 return (NULL);
306 }
307
308 buf[HIS_MAX_RECORD_LEN -1] = '\0';
309
310 return (buf);
311 }
312
313 /*
314 * Check to see if the named dataset is currently defined as bootable
315 */
316 static boolean_t
317 zfs_is_bootfs(const char *name)
318 {
319 objset_t *os;
320
321 if (dmu_objset_hold(name, FTAG, &os) == 0) {
322 boolean_t ret;
323 ret = (dmu_objset_id(os) == spa_bootfs(dmu_objset_spa(os)));
324 dmu_objset_rele(os, FTAG);
325 return (ret);
326 }
327 return (B_FALSE);
328 }
329
330 /*
331 * Return non-zero if the spa version is less than requested version.
332 */
333 static int
334 zfs_earlier_version(const char *name, int version)
335 {
336 spa_t *spa;
337
338 if (spa_open(name, &spa, FTAG) == 0) {
339 if (spa_version(spa) < version) {
340 spa_close(spa, FTAG);
341 return (1);
342 }
343 spa_close(spa, FTAG);
344 }
345 return (0);
346 }
347
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 case ZFS_PROP_FILESYSTEM_LIMIT:
627 case ZFS_PROP_SNAPSHOT_LIMIT:
628 if (!INGLOBALZONE(curproc)) {
629 uint64_t zoned;
630 char setpoint[MAXNAMELEN];
631 /*
632 * Unprivileged users are allowed to modify the
633 * limit on things *under* (ie. contained by)
634 * the thing they own.
635 */
636 if (dsl_prop_get_integer(dsname, "zoned", &zoned,
637 setpoint))
638 return (SET_ERROR(EPERM));
639 if (!zoned || strlen(dsname) <= strlen(setpoint))
640 return (SET_ERROR(EPERM));
641 }
642 break;
643
644 case ZFS_PROP_MLSLABEL:
645 if (!is_system_labeled())
646 return (SET_ERROR(EPERM));
647
648 if (nvpair_value_string(propval, &strval) == 0) {
649 int err;
650
651 err = zfs_set_slabel_policy(dsname, strval, CRED());
652 if (err != 0)
653 return (err);
654 }
655 break;
656 }
657
658 return (zfs_secpolicy_write_perms(dsname, zfs_prop_to_name(prop), cr));
659 }
660
661 /* ARGSUSED */
662 static int
663 zfs_secpolicy_set_fsacl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
664 {
665 int error;
666
667 error = zfs_dozonecheck(zc->zc_name, cr);
668 if (error != 0)
669 return (error);
670
671 /*
672 * permission to set permissions will be evaluated later in
673 * dsl_deleg_can_allow()
674 */
675 return (0);
676 }
677
678 /* ARGSUSED */
679 static int
680 zfs_secpolicy_rollback(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
681 {
682 return (zfs_secpolicy_write_perms(zc->zc_name,
683 ZFS_DELEG_PERM_ROLLBACK, cr));
684 }
685
686 /* ARGSUSED */
687 static int
688 zfs_secpolicy_send(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
689 {
690 dsl_pool_t *dp;
691 dsl_dataset_t *ds;
692 char *cp;
693 int error;
694
695 /*
696 * Generate the current snapshot name from the given objsetid, then
697 * use that name for the secpolicy/zone checks.
698 */
699 cp = strchr(zc->zc_name, '@');
700 if (cp == NULL)
701 return (SET_ERROR(EINVAL));
702 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
703 if (error != 0)
704 return (error);
705
706 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &ds);
707 if (error != 0) {
708 dsl_pool_rele(dp, FTAG);
709 return (error);
710 }
711
712 dsl_dataset_name(ds, zc->zc_name);
713
714 error = zfs_secpolicy_write_perms_ds(zc->zc_name, ds,
715 ZFS_DELEG_PERM_SEND, cr);
716 dsl_dataset_rele(ds, FTAG);
717 dsl_pool_rele(dp, FTAG);
718
719 return (error);
720 }
721
722 /* ARGSUSED */
723 static int
724 zfs_secpolicy_send_new(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
725 {
726 return (zfs_secpolicy_write_perms(zc->zc_name,
727 ZFS_DELEG_PERM_SEND, cr));
728 }
729
730 /* ARGSUSED */
731 static int
732 zfs_secpolicy_deleg_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
733 {
734 vnode_t *vp;
735 int error;
736
737 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
738 NO_FOLLOW, NULL, &vp)) != 0)
739 return (error);
740
741 /* Now make sure mntpnt and dataset are ZFS */
742
743 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
744 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
745 zc->zc_name) != 0)) {
746 VN_RELE(vp);
747 return (SET_ERROR(EPERM));
748 }
749
750 VN_RELE(vp);
751 return (dsl_deleg_access(zc->zc_name,
752 ZFS_DELEG_PERM_SHARE, cr));
753 }
754
755 int
756 zfs_secpolicy_share(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
757 {
758 if (!INGLOBALZONE(curproc))
759 return (SET_ERROR(EPERM));
760
761 if (secpolicy_nfs(cr) == 0) {
762 return (0);
763 } else {
764 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
765 }
766 }
767
768 int
769 zfs_secpolicy_smb_acl(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
770 {
771 if (!INGLOBALZONE(curproc))
772 return (SET_ERROR(EPERM));
773
774 if (secpolicy_smb(cr) == 0) {
775 return (0);
776 } else {
777 return (zfs_secpolicy_deleg_share(zc, innvl, cr));
778 }
779 }
780
781 static int
782 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
783 {
784 char *cp;
785
786 /*
787 * Remove the @bla or /bla from the end of the name to get the parent.
788 */
789 (void) strncpy(parent, datasetname, parentsize);
790 cp = strrchr(parent, '@');
791 if (cp != NULL) {
792 cp[0] = '\0';
793 } else {
794 cp = strrchr(parent, '/');
795 if (cp == NULL)
796 return (SET_ERROR(ENOENT));
797 cp[0] = '\0';
798 }
799
800 return (0);
801 }
802
803 int
804 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
805 {
806 int error;
807
808 if ((error = zfs_secpolicy_write_perms(name,
809 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
810 return (error);
811
812 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
813 }
814
815 /* ARGSUSED */
816 static int
817 zfs_secpolicy_destroy(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
818 {
819 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
820 }
821
822 /*
823 * Destroying snapshots with delegated permissions requires
824 * descendant mount and destroy permissions.
825 */
826 /* ARGSUSED */
827 static int
828 zfs_secpolicy_destroy_snaps(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
829 {
830 nvlist_t *snaps;
831 nvpair_t *pair, *nextpair;
832 int error = 0;
833
834 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
835 return (SET_ERROR(EINVAL));
836 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
837 pair = nextpair) {
838 nextpair = nvlist_next_nvpair(snaps, pair);
839 error = zfs_secpolicy_destroy_perms(nvpair_name(pair), cr);
840 if (error == ENOENT) {
841 /*
842 * Ignore any snapshots that don't exist (we consider
843 * them "already destroyed"). Remove the name from the
844 * nvl here in case the snapshot is created between
845 * now and when we try to destroy it (in which case
846 * we don't want to destroy it since we haven't
847 * checked for permission).
848 */
849 fnvlist_remove_nvpair(snaps, pair);
850 error = 0;
851 }
852 if (error != 0)
853 break;
854 }
855
856 return (error);
857 }
858
859 int
860 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
861 {
862 char parentname[MAXNAMELEN];
863 int error;
864
865 if ((error = zfs_secpolicy_write_perms(from,
866 ZFS_DELEG_PERM_RENAME, cr)) != 0)
867 return (error);
868
869 if ((error = zfs_secpolicy_write_perms(from,
870 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
871 return (error);
872
873 if ((error = zfs_get_parent(to, parentname,
874 sizeof (parentname))) != 0)
875 return (error);
876
877 if ((error = zfs_secpolicy_write_perms(parentname,
878 ZFS_DELEG_PERM_CREATE, cr)) != 0)
879 return (error);
880
881 if ((error = zfs_secpolicy_write_perms(parentname,
882 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
883 return (error);
884
885 return (error);
886 }
887
888 /* ARGSUSED */
889 static int
890 zfs_secpolicy_rename(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
891 {
892 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
893 }
894
895 /* ARGSUSED */
896 static int
897 zfs_secpolicy_promote(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
898 {
899 dsl_pool_t *dp;
900 dsl_dataset_t *clone;
901 int error;
902
903 error = zfs_secpolicy_write_perms(zc->zc_name,
904 ZFS_DELEG_PERM_PROMOTE, cr);
905 if (error != 0)
906 return (error);
907
908 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
909 if (error != 0)
910 return (error);
911
912 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &clone);
913
914 if (error == 0) {
915 char parentname[MAXNAMELEN];
916 dsl_dataset_t *origin = NULL;
917 dsl_dir_t *dd;
918 dd = clone->ds_dir;
919
920 error = dsl_dataset_hold_obj(dd->dd_pool,
921 dsl_dir_phys(dd)->dd_origin_obj, FTAG, &origin);
922 if (error != 0) {
923 dsl_dataset_rele(clone, FTAG);
924 dsl_pool_rele(dp, FTAG);
925 return (error);
926 }
927
928 error = zfs_secpolicy_write_perms_ds(zc->zc_name, clone,
929 ZFS_DELEG_PERM_MOUNT, cr);
930
931 dsl_dataset_name(origin, parentname);
932 if (error == 0) {
933 error = zfs_secpolicy_write_perms_ds(parentname, origin,
934 ZFS_DELEG_PERM_PROMOTE, cr);
935 }
936 dsl_dataset_rele(clone, FTAG);
937 dsl_dataset_rele(origin, FTAG);
938 }
939 dsl_pool_rele(dp, FTAG);
940 return (error);
941 }
942
943 /* ARGSUSED */
944 static int
945 zfs_secpolicy_recv(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
946 {
947 int error;
948
949 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
950 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
951 return (error);
952
953 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
954 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
955 return (error);
956
957 return (zfs_secpolicy_write_perms(zc->zc_name,
958 ZFS_DELEG_PERM_CREATE, cr));
959 }
960
961 int
962 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
963 {
964 return (zfs_secpolicy_write_perms(name,
965 ZFS_DELEG_PERM_SNAPSHOT, cr));
966 }
967
968 /*
969 * Check for permission to create each snapshot in the nvlist.
970 */
971 /* ARGSUSED */
972 static int
973 zfs_secpolicy_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
974 {
975 nvlist_t *snaps;
976 int error = 0;
977 nvpair_t *pair;
978
979 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
980 return (SET_ERROR(EINVAL));
981 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
982 pair = nvlist_next_nvpair(snaps, pair)) {
983 char *name = nvpair_name(pair);
984 char *atp = strchr(name, '@');
985
986 if (atp == NULL) {
987 error = SET_ERROR(EINVAL);
988 break;
989 }
990 *atp = '\0';
991 error = zfs_secpolicy_snapshot_perms(name, cr);
992 *atp = '@';
993 if (error != 0)
994 break;
995 }
996 return (error);
997 }
998
999 /*
1000 * Check for permission to create each snapshot in the nvlist.
1001 */
1002 /* ARGSUSED */
1003 static int
1004 zfs_secpolicy_bookmark(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1005 {
1006 int error = 0;
1007
1008 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
1009 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
1010 char *name = nvpair_name(pair);
1011 char *hashp = strchr(name, '#');
1012
1013 if (hashp == NULL) {
1014 error = SET_ERROR(EINVAL);
1015 break;
1016 }
1017 *hashp = '\0';
1018 error = zfs_secpolicy_write_perms(name,
1019 ZFS_DELEG_PERM_BOOKMARK, cr);
1020 *hashp = '#';
1021 if (error != 0)
1022 break;
1023 }
1024 return (error);
1025 }
1026
1027 /* ARGSUSED */
1028 static int
1029 zfs_secpolicy_destroy_bookmarks(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1030 {
1031 nvpair_t *pair, *nextpair;
1032 int error = 0;
1033
1034 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1035 pair = nextpair) {
1036 char *name = nvpair_name(pair);
1037 char *hashp = strchr(name, '#');
1038 nextpair = nvlist_next_nvpair(innvl, pair);
1039
1040 if (hashp == NULL) {
1041 error = SET_ERROR(EINVAL);
1042 break;
1043 }
1044
1045 *hashp = '\0';
1046 error = zfs_secpolicy_write_perms(name,
1047 ZFS_DELEG_PERM_DESTROY, cr);
1048 *hashp = '#';
1049 if (error == ENOENT) {
1050 /*
1051 * Ignore any filesystems that don't exist (we consider
1052 * their bookmarks "already destroyed"). Remove
1053 * the name from the nvl here in case the filesystem
1054 * is created between now and when we try to destroy
1055 * the bookmark (in which case we don't want to
1056 * destroy it since we haven't checked for permission).
1057 */
1058 fnvlist_remove_nvpair(innvl, pair);
1059 error = 0;
1060 }
1061 if (error != 0)
1062 break;
1063 }
1064
1065 return (error);
1066 }
1067
1068 /* ARGSUSED */
1069 static int
1070 zfs_secpolicy_log_history(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1071 {
1072 /*
1073 * Even root must have a proper TSD so that we know what pool
1074 * to log to.
1075 */
1076 if (tsd_get(zfs_allow_log_key) == NULL)
1077 return (SET_ERROR(EPERM));
1078 return (0);
1079 }
1080
1081 static int
1082 zfs_secpolicy_create_clone(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1083 {
1084 char parentname[MAXNAMELEN];
1085 int error;
1086 char *origin;
1087
1088 if ((error = zfs_get_parent(zc->zc_name, parentname,
1089 sizeof (parentname))) != 0)
1090 return (error);
1091
1092 if (nvlist_lookup_string(innvl, "origin", &origin) == 0 &&
1093 (error = zfs_secpolicy_write_perms(origin,
1094 ZFS_DELEG_PERM_CLONE, cr)) != 0)
1095 return (error);
1096
1097 if ((error = zfs_secpolicy_write_perms(parentname,
1098 ZFS_DELEG_PERM_CREATE, cr)) != 0)
1099 return (error);
1100
1101 return (zfs_secpolicy_write_perms(parentname,
1102 ZFS_DELEG_PERM_MOUNT, cr));
1103 }
1104
1105 /*
1106 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
1107 * SYS_CONFIG privilege, which is not available in a local zone.
1108 */
1109 /* ARGSUSED */
1110 static int
1111 zfs_secpolicy_config(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1112 {
1113 if (secpolicy_sys_config(cr, B_FALSE) != 0)
1114 return (SET_ERROR(EPERM));
1115
1116 return (0);
1117 }
1118
1119 /*
1120 * Policy for object to name lookups.
1121 */
1122 /* ARGSUSED */
1123 static int
1124 zfs_secpolicy_diff(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1125 {
1126 int error;
1127
1128 if ((error = secpolicy_sys_config(cr, B_FALSE)) == 0)
1129 return (0);
1130
1131 error = zfs_secpolicy_write_perms(zc->zc_name, ZFS_DELEG_PERM_DIFF, cr);
1132 return (error);
1133 }
1134
1135 /*
1136 * Policy for fault injection. Requires all privileges.
1137 */
1138 /* ARGSUSED */
1139 static int
1140 zfs_secpolicy_inject(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1141 {
1142 return (secpolicy_zinject(cr));
1143 }
1144
1145 /* ARGSUSED */
1146 static int
1147 zfs_secpolicy_inherit_prop(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1148 {
1149 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
1150
1151 if (prop == ZPROP_INVAL) {
1152 if (!zfs_prop_user(zc->zc_value))
1153 return (SET_ERROR(EINVAL));
1154 return (zfs_secpolicy_write_perms(zc->zc_name,
1155 ZFS_DELEG_PERM_USERPROP, cr));
1156 } else {
1157 return (zfs_secpolicy_setprop(zc->zc_name, prop,
1158 NULL, cr));
1159 }
1160 }
1161
1162 static int
1163 zfs_secpolicy_userspace_one(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1164 {
1165 int err = zfs_secpolicy_read(zc, innvl, cr);
1166 if (err)
1167 return (err);
1168
1169 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1170 return (SET_ERROR(EINVAL));
1171
1172 if (zc->zc_value[0] == 0) {
1173 /*
1174 * They are asking about a posix uid/gid. If it's
1175 * themself, allow it.
1176 */
1177 if (zc->zc_objset_type == ZFS_PROP_USERUSED ||
1178 zc->zc_objset_type == ZFS_PROP_USERQUOTA) {
1179 if (zc->zc_guid == crgetuid(cr))
1180 return (0);
1181 } else {
1182 if (groupmember(zc->zc_guid, cr))
1183 return (0);
1184 }
1185 }
1186
1187 return (zfs_secpolicy_write_perms(zc->zc_name,
1188 userquota_perms[zc->zc_objset_type], cr));
1189 }
1190
1191 static int
1192 zfs_secpolicy_userspace_many(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1193 {
1194 int err = zfs_secpolicy_read(zc, innvl, cr);
1195 if (err)
1196 return (err);
1197
1198 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
1199 return (SET_ERROR(EINVAL));
1200
1201 return (zfs_secpolicy_write_perms(zc->zc_name,
1202 userquota_perms[zc->zc_objset_type], cr));
1203 }
1204
1205 /* ARGSUSED */
1206 static int
1207 zfs_secpolicy_userspace_upgrade(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1208 {
1209 return (zfs_secpolicy_setprop(zc->zc_name, ZFS_PROP_VERSION,
1210 NULL, cr));
1211 }
1212
1213 /* ARGSUSED */
1214 static int
1215 zfs_secpolicy_hold(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1216 {
1217 nvpair_t *pair;
1218 nvlist_t *holds;
1219 int error;
1220
1221 error = nvlist_lookup_nvlist(innvl, "holds", &holds);
1222 if (error != 0)
1223 return (SET_ERROR(EINVAL));
1224
1225 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1226 pair = nvlist_next_nvpair(holds, pair)) {
1227 char fsname[MAXNAMELEN];
1228 error = dmu_fsname(nvpair_name(pair), fsname);
1229 if (error != 0)
1230 return (error);
1231 error = zfs_secpolicy_write_perms(fsname,
1232 ZFS_DELEG_PERM_HOLD, cr);
1233 if (error != 0)
1234 return (error);
1235 }
1236 return (0);
1237 }
1238
1239 /* ARGSUSED */
1240 static int
1241 zfs_secpolicy_release(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1242 {
1243 nvpair_t *pair;
1244 int error;
1245
1246 for (pair = nvlist_next_nvpair(innvl, NULL); pair != NULL;
1247 pair = nvlist_next_nvpair(innvl, pair)) {
1248 char fsname[MAXNAMELEN];
1249 error = dmu_fsname(nvpair_name(pair), fsname);
1250 if (error != 0)
1251 return (error);
1252 error = zfs_secpolicy_write_perms(fsname,
1253 ZFS_DELEG_PERM_RELEASE, cr);
1254 if (error != 0)
1255 return (error);
1256 }
1257 return (0);
1258 }
1259
1260 /*
1261 * Policy for allowing temporary snapshots to be taken or released
1262 */
1263 static int
1264 zfs_secpolicy_tmp_snapshot(zfs_cmd_t *zc, nvlist_t *innvl, cred_t *cr)
1265 {
1266 /*
1267 * A temporary snapshot is the same as a snapshot,
1268 * hold, destroy and release all rolled into one.
1269 * Delegated diff alone is sufficient that we allow this.
1270 */
1271 int error;
1272
1273 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
1274 ZFS_DELEG_PERM_DIFF, cr)) == 0)
1275 return (0);
1276
1277 error = zfs_secpolicy_snapshot_perms(zc->zc_name, cr);
1278 if (error == 0)
1279 error = zfs_secpolicy_hold(zc, innvl, cr);
1280 if (error == 0)
1281 error = zfs_secpolicy_release(zc, innvl, cr);
1282 if (error == 0)
1283 error = zfs_secpolicy_destroy(zc, innvl, cr);
1284 return (error);
1285 }
1286
1287 /*
1288 * Returns the nvlist as specified by the user in the zfs_cmd_t.
1289 */
1290 static int
1291 get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
1292 {
1293 char *packed;
1294 int error;
1295 nvlist_t *list = NULL;
1296
1297 /*
1298 * Read in and unpack the user-supplied nvlist.
1299 */
1300 if (size == 0)
1301 return (SET_ERROR(EINVAL));
1302
1303 packed = kmem_alloc(size, KM_SLEEP);
1304
1305 if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
1306 iflag)) != 0) {
1307 kmem_free(packed, size);
1308 return (SET_ERROR(EFAULT));
1309 }
1310
1311 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
1312 kmem_free(packed, size);
1313 return (error);
1314 }
1315
1316 kmem_free(packed, size);
1317
1318 *nvp = list;
1319 return (0);
1320 }
1321
1322 /*
1323 * Reduce the size of this nvlist until it can be serialized in 'max' bytes.
1324 * Entries will be removed from the end of the nvlist, and one int32 entry
1325 * named "N_MORE_ERRORS" will be added indicating how many entries were
1326 * removed.
1327 */
1328 static int
1329 nvlist_smush(nvlist_t *errors, size_t max)
1330 {
1331 size_t size;
1332
1333 size = fnvlist_size(errors);
1334
1335 if (size > max) {
1336 nvpair_t *more_errors;
1337 int n = 0;
1338
1339 if (max < 1024)
1340 return (SET_ERROR(ENOMEM));
1341
1342 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, 0);
1343 more_errors = nvlist_prev_nvpair(errors, NULL);
1344
1345 do {
1346 nvpair_t *pair = nvlist_prev_nvpair(errors,
1347 more_errors);
1348 fnvlist_remove_nvpair(errors, pair);
1349 n++;
1350 size = fnvlist_size(errors);
1351 } while (size > max);
1352
1353 fnvlist_remove_nvpair(errors, more_errors);
1354 fnvlist_add_int32(errors, ZPROP_N_MORE_ERRORS, n);
1355 ASSERT3U(fnvlist_size(errors), <=, max);
1356 }
1357
1358 return (0);
1359 }
1360
1361 static int
1362 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
1363 {
1364 char *packed = NULL;
1365 int error = 0;
1366 size_t size;
1367
1368 size = fnvlist_size(nvl);
1369
1370 if (size > zc->zc_nvlist_dst_size) {
1371 error = SET_ERROR(ENOMEM);
1372 } else {
1373 packed = fnvlist_pack(nvl, &size);
1374 if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
1375 size, zc->zc_iflags) != 0)
1376 error = SET_ERROR(EFAULT);
1377 fnvlist_pack_free(packed, size);
1378 }
1379
1380 zc->zc_nvlist_dst_size = size;
1381 zc->zc_nvlist_dst_filled = B_TRUE;
1382 return (error);
1383 }
1384
1385 static int
1386 getzfsvfs(const char *dsname, zfsvfs_t **zfvp)
1387 {
1388 objset_t *os;
1389 int error;
1390
1391 error = dmu_objset_hold(dsname, FTAG, &os);
1392 if (error != 0)
1393 return (error);
1394 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1395 dmu_objset_rele(os, FTAG);
1396 return (SET_ERROR(EINVAL));
1397 }
1398
1399 mutex_enter(&os->os_user_ptr_lock);
1400 *zfvp = dmu_objset_get_user(os);
1401 if (*zfvp) {
1402 VFS_HOLD((*zfvp)->z_vfs);
1403 } else {
1404 error = SET_ERROR(ESRCH);
1405 }
1406 mutex_exit(&os->os_user_ptr_lock);
1407 dmu_objset_rele(os, FTAG);
1408 return (error);
1409 }
1410
1411 /*
1412 * Find a zfsvfs_t for a mounted filesystem, or create our own, in which
1413 * case its z_vfs will be NULL, and it will be opened as the owner.
1414 * If 'writer' is set, the z_teardown_lock will be held for RW_WRITER,
1415 * which prevents all vnode ops from running.
1416 */
1417 static int
1418 zfsvfs_hold(const char *name, void *tag, zfsvfs_t **zfvp, boolean_t writer)
1419 {
1420 int error = 0;
1421
1422 if (getzfsvfs(name, zfvp) != 0)
1423 error = zfsvfs_create(name, zfvp);
1424 if (error == 0) {
1425 rrm_enter(&(*zfvp)->z_teardown_lock, (writer) ? RW_WRITER :
1426 RW_READER, tag);
1427 if ((*zfvp)->z_unmounted) {
1428 /*
1429 * XXX we could probably try again, since the unmounting
1430 * thread should be just about to disassociate the
1431 * objset from the zfsvfs.
1432 */
1433 rrm_exit(&(*zfvp)->z_teardown_lock, tag);
1434 return (SET_ERROR(EBUSY));
1435 }
1436 }
1437 return (error);
1438 }
1439
1440 static void
1441 zfsvfs_rele(zfsvfs_t *zfsvfs, void *tag)
1442 {
1443 rrm_exit(&zfsvfs->z_teardown_lock, tag);
1444
1445 if (zfsvfs->z_vfs) {
1446 VFS_RELE(zfsvfs->z_vfs);
1447 } else {
1448 dmu_objset_disown(zfsvfs->z_os, zfsvfs);
1449 zfsvfs_free(zfsvfs);
1450 }
1451 }
1452
1453 static int
1454 zfs_ioc_pool_create(zfs_cmd_t *zc)
1455 {
1456 int error;
1457 nvlist_t *config, *props = NULL;
1458 nvlist_t *rootprops = NULL;
1459 nvlist_t *zplprops = NULL;
1460
1461 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1462 zc->zc_iflags, &config))
1463 return (error);
1464
1465 if (zc->zc_nvlist_src_size != 0 && (error =
1466 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1467 zc->zc_iflags, &props))) {
1468 nvlist_free(config);
1469 return (error);
1470 }
1471
1472 if (props) {
1473 nvlist_t *nvl = NULL;
1474 uint64_t version = SPA_VERSION;
1475
1476 (void) nvlist_lookup_uint64(props,
1477 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version);
1478 if (!SPA_VERSION_IS_SUPPORTED(version)) {
1479 error = SET_ERROR(EINVAL);
1480 goto pool_props_bad;
1481 }
1482 (void) nvlist_lookup_nvlist(props, ZPOOL_ROOTFS_PROPS, &nvl);
1483 if (nvl) {
1484 error = nvlist_dup(nvl, &rootprops, KM_SLEEP);
1485 if (error != 0) {
1486 nvlist_free(config);
1487 nvlist_free(props);
1488 return (error);
1489 }
1490 (void) nvlist_remove_all(props, ZPOOL_ROOTFS_PROPS);
1491 }
1492 VERIFY(nvlist_alloc(&zplprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1493 error = zfs_fill_zplprops_root(version, rootprops,
1494 zplprops, NULL);
1495 if (error != 0)
1496 goto pool_props_bad;
1497 }
1498
1499 error = spa_create(zc->zc_name, config, props, zplprops);
1500
1501 /*
1502 * Set the remaining root properties
1503 */
1504 if (!error && (error = zfs_set_prop_nvlist(zc->zc_name,
1505 ZPROP_SRC_LOCAL, rootprops, NULL)) != 0)
1506 (void) spa_destroy(zc->zc_name);
1507
1508 pool_props_bad:
1509 nvlist_free(rootprops);
1510 nvlist_free(zplprops);
1511 nvlist_free(config);
1512 nvlist_free(props);
1513
1514 return (error);
1515 }
1516
1517 static int
1518 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
1519 {
1520 int error;
1521 zfs_log_history(zc);
1522 error = spa_destroy(zc->zc_name);
1523 if (error == 0)
1524 zvol_remove_minors(zc->zc_name);
1525 return (error);
1526 }
1527
1528 static int
1529 zfs_ioc_pool_import(zfs_cmd_t *zc)
1530 {
1531 nvlist_t *config, *props = NULL;
1532 uint64_t guid;
1533 int error;
1534
1535 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1536 zc->zc_iflags, &config)) != 0)
1537 return (error);
1538
1539 if (zc->zc_nvlist_src_size != 0 && (error =
1540 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1541 zc->zc_iflags, &props))) {
1542 nvlist_free(config);
1543 return (error);
1544 }
1545
1546 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
1547 guid != zc->zc_guid)
1548 error = SET_ERROR(EINVAL);
1549 else
1550 error = spa_import(zc->zc_name, config, props, zc->zc_cookie);
1551
1552 if (zc->zc_nvlist_dst != 0) {
1553 int err;
1554
1555 if ((err = put_nvlist(zc, config)) != 0)
1556 error = err;
1557 }
1558
1559 nvlist_free(config);
1560
1561 if (props)
1562 nvlist_free(props);
1563
1564 return (error);
1565 }
1566
1567 static int
1568 zfs_ioc_pool_export(zfs_cmd_t *zc)
1569 {
1570 int error;
1571 boolean_t force = (boolean_t)zc->zc_cookie;
1572 boolean_t hardforce = (boolean_t)zc->zc_guid;
1573
1574 zfs_log_history(zc);
1575 error = spa_export(zc->zc_name, NULL, force, hardforce);
1576 if (error == 0)
1577 zvol_remove_minors(zc->zc_name);
1578 return (error);
1579 }
1580
1581 static int
1582 zfs_ioc_pool_configs(zfs_cmd_t *zc)
1583 {
1584 nvlist_t *configs;
1585 int error;
1586
1587 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
1588 return (SET_ERROR(EEXIST));
1589
1590 error = put_nvlist(zc, configs);
1591
1592 nvlist_free(configs);
1593
1594 return (error);
1595 }
1596
1597 /*
1598 * inputs:
1599 * zc_name name of the pool
1600 *
1601 * outputs:
1602 * zc_cookie real errno
1603 * zc_nvlist_dst config nvlist
1604 * zc_nvlist_dst_size size of config nvlist
1605 */
1606 static int
1607 zfs_ioc_pool_stats(zfs_cmd_t *zc)
1608 {
1609 nvlist_t *config;
1610 int error;
1611 int ret = 0;
1612
1613 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
1614 sizeof (zc->zc_value));
1615
1616 if (config != NULL) {
1617 ret = put_nvlist(zc, config);
1618 nvlist_free(config);
1619
1620 /*
1621 * The config may be present even if 'error' is non-zero.
1622 * In this case we return success, and preserve the real errno
1623 * in 'zc_cookie'.
1624 */
1625 zc->zc_cookie = error;
1626 } else {
1627 ret = error;
1628 }
1629
1630 return (ret);
1631 }
1632
1633 /*
1634 * Try to import the given pool, returning pool stats as appropriate so that
1635 * user land knows which devices are available and overall pool health.
1636 */
1637 static int
1638 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
1639 {
1640 nvlist_t *tryconfig, *config;
1641 int error;
1642
1643 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1644 zc->zc_iflags, &tryconfig)) != 0)
1645 return (error);
1646
1647 config = spa_tryimport(tryconfig);
1648
1649 nvlist_free(tryconfig);
1650
1651 if (config == NULL)
1652 return (SET_ERROR(EINVAL));
1653
1654 error = put_nvlist(zc, config);
1655 nvlist_free(config);
1656
1657 return (error);
1658 }
1659
1660 /*
1661 * inputs:
1662 * zc_name name of the pool
1663 * zc_cookie scan func (pool_scan_func_t)
1664 */
1665 static int
1666 zfs_ioc_pool_scan(zfs_cmd_t *zc)
1667 {
1668 spa_t *spa;
1669 int error;
1670
1671 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1672 return (error);
1673
1674 if (zc->zc_cookie == POOL_SCAN_NONE)
1675 error = spa_scan_stop(spa);
1676 else
1677 error = spa_scan(spa, zc->zc_cookie);
1678
1679 spa_close(spa, FTAG);
1680
1681 return (error);
1682 }
1683
1684 static int
1685 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
1686 {
1687 spa_t *spa;
1688 int error;
1689
1690 error = spa_open(zc->zc_name, &spa, FTAG);
1691 if (error == 0) {
1692 spa_freeze(spa);
1693 spa_close(spa, FTAG);
1694 }
1695 return (error);
1696 }
1697
1698 static int
1699 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
1700 {
1701 spa_t *spa;
1702 int error;
1703
1704 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1705 return (error);
1706
1707 if (zc->zc_cookie < spa_version(spa) ||
1708 !SPA_VERSION_IS_SUPPORTED(zc->zc_cookie)) {
1709 spa_close(spa, FTAG);
1710 return (SET_ERROR(EINVAL));
1711 }
1712
1713 spa_upgrade(spa, zc->zc_cookie);
1714 spa_close(spa, FTAG);
1715
1716 return (error);
1717 }
1718
1719 static int
1720 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
1721 {
1722 spa_t *spa;
1723 char *hist_buf;
1724 uint64_t size;
1725 int error;
1726
1727 if ((size = zc->zc_history_len) == 0)
1728 return (SET_ERROR(EINVAL));
1729
1730 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1731 return (error);
1732
1733 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
1734 spa_close(spa, FTAG);
1735 return (SET_ERROR(ENOTSUP));
1736 }
1737
1738 hist_buf = kmem_alloc(size, KM_SLEEP);
1739 if ((error = spa_history_get(spa, &zc->zc_history_offset,
1740 &zc->zc_history_len, hist_buf)) == 0) {
1741 error = ddi_copyout(hist_buf,
1742 (void *)(uintptr_t)zc->zc_history,
1743 zc->zc_history_len, zc->zc_iflags);
1744 }
1745
1746 spa_close(spa, FTAG);
1747 kmem_free(hist_buf, size);
1748 return (error);
1749 }
1750
1751 static int
1752 zfs_ioc_pool_reguid(zfs_cmd_t *zc)
1753 {
1754 spa_t *spa;
1755 int error;
1756
1757 error = spa_open(zc->zc_name, &spa, FTAG);
1758 if (error == 0) {
1759 error = spa_change_guid(spa);
1760 spa_close(spa, FTAG);
1761 }
1762 return (error);
1763 }
1764
1765 static int
1766 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
1767 {
1768 return (dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value));
1769 }
1770
1771 /*
1772 * inputs:
1773 * zc_name name of filesystem
1774 * zc_obj object to find
1775 *
1776 * outputs:
1777 * zc_value name of object
1778 */
1779 static int
1780 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
1781 {
1782 objset_t *os;
1783 int error;
1784
1785 /* XXX reading from objset not owned */
1786 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1787 return (error);
1788 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1789 dmu_objset_rele(os, FTAG);
1790 return (SET_ERROR(EINVAL));
1791 }
1792 error = zfs_obj_to_path(os, zc->zc_obj, zc->zc_value,
1793 sizeof (zc->zc_value));
1794 dmu_objset_rele(os, FTAG);
1795
1796 return (error);
1797 }
1798
1799 /*
1800 * inputs:
1801 * zc_name name of filesystem
1802 * zc_obj object to find
1803 *
1804 * outputs:
1805 * zc_stat stats on object
1806 * zc_value path to object
1807 */
1808 static int
1809 zfs_ioc_obj_to_stats(zfs_cmd_t *zc)
1810 {
1811 objset_t *os;
1812 int error;
1813
1814 /* XXX reading from objset not owned */
1815 if ((error = dmu_objset_hold(zc->zc_name, FTAG, &os)) != 0)
1816 return (error);
1817 if (dmu_objset_type(os) != DMU_OST_ZFS) {
1818 dmu_objset_rele(os, FTAG);
1819 return (SET_ERROR(EINVAL));
1820 }
1821 error = zfs_obj_to_stats(os, zc->zc_obj, &zc->zc_stat, zc->zc_value,
1822 sizeof (zc->zc_value));
1823 dmu_objset_rele(os, FTAG);
1824
1825 return (error);
1826 }
1827
1828 static int
1829 zfs_ioc_vdev_add(zfs_cmd_t *zc)
1830 {
1831 spa_t *spa;
1832 int error;
1833 nvlist_t *config, **l2cache, **spares;
1834 uint_t nl2cache = 0, nspares = 0;
1835
1836 error = spa_open(zc->zc_name, &spa, FTAG);
1837 if (error != 0)
1838 return (error);
1839
1840 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1841 zc->zc_iflags, &config);
1842 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
1843 &l2cache, &nl2cache);
1844
1845 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1846 &spares, &nspares);
1847
1848 /*
1849 * A root pool with concatenated devices is not supported.
1850 * Thus, can not add a device to a root pool.
1851 *
1852 * Intent log device can not be added to a rootpool because
1853 * during mountroot, zil is replayed, a seperated log device
1854 * can not be accessed during the mountroot time.
1855 *
1856 * l2cache and spare devices are ok to be added to a rootpool.
1857 */
1858 if (spa_bootfs(spa) != 0 && nl2cache == 0 && nspares == 0) {
1859 nvlist_free(config);
1860 spa_close(spa, FTAG);
1861 return (SET_ERROR(EDOM));
1862 }
1863
1864 if (error == 0) {
1865 error = spa_vdev_add(spa, config);
1866 nvlist_free(config);
1867 }
1868 spa_close(spa, FTAG);
1869 return (error);
1870 }
1871
1872 /*
1873 * inputs:
1874 * zc_name name of the pool
1875 * zc_nvlist_conf nvlist of devices to remove
1876 * zc_cookie to stop the remove?
1877 */
1878 static int
1879 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1880 {
1881 spa_t *spa;
1882 int error;
1883
1884 error = spa_open(zc->zc_name, &spa, FTAG);
1885 if (error != 0)
1886 return (error);
1887 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1888 spa_close(spa, FTAG);
1889 return (error);
1890 }
1891
1892 static int
1893 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1894 {
1895 spa_t *spa;
1896 int error;
1897 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1898
1899 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1900 return (error);
1901 switch (zc->zc_cookie) {
1902 case VDEV_STATE_ONLINE:
1903 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1904 break;
1905
1906 case VDEV_STATE_OFFLINE:
1907 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1908 break;
1909
1910 case VDEV_STATE_FAULTED:
1911 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1912 zc->zc_obj != VDEV_AUX_EXTERNAL)
1913 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1914
1915 error = vdev_fault(spa, zc->zc_guid, zc->zc_obj);
1916 break;
1917
1918 case VDEV_STATE_DEGRADED:
1919 if (zc->zc_obj != VDEV_AUX_ERR_EXCEEDED &&
1920 zc->zc_obj != VDEV_AUX_EXTERNAL)
1921 zc->zc_obj = VDEV_AUX_ERR_EXCEEDED;
1922
1923 error = vdev_degrade(spa, zc->zc_guid, zc->zc_obj);
1924 break;
1925
1926 default:
1927 error = SET_ERROR(EINVAL);
1928 }
1929 zc->zc_cookie = newstate;
1930 spa_close(spa, FTAG);
1931 return (error);
1932 }
1933
1934 static int
1935 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1936 {
1937 spa_t *spa;
1938 int replacing = zc->zc_cookie;
1939 nvlist_t *config;
1940 int error;
1941
1942 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1943 return (error);
1944
1945 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1946 zc->zc_iflags, &config)) == 0) {
1947 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1948 nvlist_free(config);
1949 }
1950
1951 spa_close(spa, FTAG);
1952 return (error);
1953 }
1954
1955 static int
1956 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1957 {
1958 spa_t *spa;
1959 int error;
1960
1961 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1962 return (error);
1963
1964 error = spa_vdev_detach(spa, zc->zc_guid, 0, B_FALSE);
1965
1966 spa_close(spa, FTAG);
1967 return (error);
1968 }
1969
1970 static int
1971 zfs_ioc_vdev_split(zfs_cmd_t *zc)
1972 {
1973 spa_t *spa;
1974 nvlist_t *config, *props = NULL;
1975 int error;
1976 boolean_t exp = !!(zc->zc_cookie & ZPOOL_EXPORT_AFTER_SPLIT);
1977
1978 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1979 return (error);
1980
1981 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1982 zc->zc_iflags, &config)) {
1983 spa_close(spa, FTAG);
1984 return (error);
1985 }
1986
1987 if (zc->zc_nvlist_src_size != 0 && (error =
1988 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1989 zc->zc_iflags, &props))) {
1990 spa_close(spa, FTAG);
1991 nvlist_free(config);
1992 return (error);
1993 }
1994
1995 error = spa_vdev_split_mirror(spa, zc->zc_string, config, props, exp);
1996
1997 spa_close(spa, FTAG);
1998
1999 nvlist_free(config);
2000 nvlist_free(props);
2001
2002 return (error);
2003 }
2004
2005 static int
2006 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
2007 {
2008 spa_t *spa;
2009 char *path = zc->zc_value;
2010 uint64_t guid = zc->zc_guid;
2011 int error;
2012
2013 error = spa_open(zc->zc_name, &spa, FTAG);
2014 if (error != 0)
2015 return (error);
2016
2017 error = spa_vdev_setpath(spa, guid, path);
2018 spa_close(spa, FTAG);
2019 return (error);
2020 }
2021
2022 static int
2023 zfs_ioc_vdev_setfru(zfs_cmd_t *zc)
2024 {
2025 spa_t *spa;
2026 char *fru = zc->zc_value;
2027 uint64_t guid = zc->zc_guid;
2028 int error;
2029
2030 error = spa_open(zc->zc_name, &spa, FTAG);
2031 if (error != 0)
2032 return (error);
2033
2034 error = spa_vdev_setfru(spa, guid, fru);
2035 spa_close(spa, FTAG);
2036 return (error);
2037 }
2038
2039 static int
2040 zfs_ioc_objset_stats_impl(zfs_cmd_t *zc, objset_t *os)
2041 {
2042 int error = 0;
2043 nvlist_t *nv;
2044
2045 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2046
2047 if (zc->zc_nvlist_dst != 0 &&
2048 (error = dsl_prop_get_all(os, &nv)) == 0) {
2049 dmu_objset_stats(os, nv);
2050 /*
2051 * NB: zvol_get_stats() will read the objset contents,
2052 * which we aren't supposed to do with a
2053 * DS_MODE_USER hold, because it could be
2054 * inconsistent. So this is a bit of a workaround...
2055 * XXX reading with out owning
2056 */
2057 if (!zc->zc_objset_stats.dds_inconsistent &&
2058 dmu_objset_type(os) == DMU_OST_ZVOL) {
2059 error = zvol_get_stats(os, nv);
2060 if (error == EIO)
2061 return (error);
2062 VERIFY0(error);
2063 }
2064 error = put_nvlist(zc, nv);
2065 nvlist_free(nv);
2066 }
2067
2068 return (error);
2069 }
2070
2071 /*
2072 * inputs:
2073 * zc_name name of filesystem
2074 * zc_nvlist_dst_size size of buffer for property nvlist
2075 *
2076 * outputs:
2077 * zc_objset_stats stats
2078 * zc_nvlist_dst property nvlist
2079 * zc_nvlist_dst_size size of property nvlist
2080 */
2081 static int
2082 zfs_ioc_objset_stats(zfs_cmd_t *zc)
2083 {
2084 objset_t *os;
2085 int error;
2086
2087 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2088 if (error == 0) {
2089 error = zfs_ioc_objset_stats_impl(zc, os);
2090 dmu_objset_rele(os, FTAG);
2091 }
2092
2093 return (error);
2094 }
2095
2096 /*
2097 * inputs:
2098 * zc_name name of filesystem
2099 * zc_nvlist_dst_size size of buffer for property nvlist
2100 *
2101 * outputs:
2102 * zc_nvlist_dst received property nvlist
2103 * zc_nvlist_dst_size size of received property nvlist
2104 *
2105 * Gets received properties (distinct from local properties on or after
2106 * SPA_VERSION_RECVD_PROPS) for callers who want to differentiate received from
2107 * local property values.
2108 */
2109 static int
2110 zfs_ioc_objset_recvd_props(zfs_cmd_t *zc)
2111 {
2112 int error = 0;
2113 nvlist_t *nv;
2114
2115 /*
2116 * Without this check, we would return local property values if the
2117 * caller has not already received properties on or after
2118 * SPA_VERSION_RECVD_PROPS.
2119 */
2120 if (!dsl_prop_get_hasrecvd(zc->zc_name))
2121 return (SET_ERROR(ENOTSUP));
2122
2123 if (zc->zc_nvlist_dst != 0 &&
2124 (error = dsl_prop_get_received(zc->zc_name, &nv)) == 0) {
2125 error = put_nvlist(zc, nv);
2126 nvlist_free(nv);
2127 }
2128
2129 return (error);
2130 }
2131
2132 static int
2133 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
2134 {
2135 uint64_t value;
2136 int error;
2137
2138 /*
2139 * zfs_get_zplprop() will either find a value or give us
2140 * the default value (if there is one).
2141 */
2142 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
2143 return (error);
2144 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
2145 return (0);
2146 }
2147
2148 /*
2149 * inputs:
2150 * zc_name name of filesystem
2151 * zc_nvlist_dst_size size of buffer for zpl property nvlist
2152 *
2153 * outputs:
2154 * zc_nvlist_dst zpl property nvlist
2155 * zc_nvlist_dst_size size of zpl property nvlist
2156 */
2157 static int
2158 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
2159 {
2160 objset_t *os;
2161 int err;
2162
2163 /* XXX reading without owning */
2164 if (err = dmu_objset_hold(zc->zc_name, FTAG, &os))
2165 return (err);
2166
2167 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
2168
2169 /*
2170 * NB: nvl_add_zplprop() will read the objset contents,
2171 * which we aren't supposed to do with a DS_MODE_USER
2172 * hold, because it could be inconsistent.
2173 */
2174 if (zc->zc_nvlist_dst != NULL &&
2175 !zc->zc_objset_stats.dds_inconsistent &&
2176 dmu_objset_type(os) == DMU_OST_ZFS) {
2177 nvlist_t *nv;
2178
2179 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2180 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
2181 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
2182 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
2183 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
2184 err = put_nvlist(zc, nv);
2185 nvlist_free(nv);
2186 } else {
2187 err = SET_ERROR(ENOENT);
2188 }
2189 dmu_objset_rele(os, FTAG);
2190 return (err);
2191 }
2192
2193 static boolean_t
2194 dataset_name_hidden(const char *name)
2195 {
2196 /*
2197 * Skip over datasets that are not visible in this zone,
2198 * internal datasets (which have a $ in their name), and
2199 * temporary datasets (which have a % in their name).
2200 */
2201 if (strchr(name, '$') != NULL)
2202 return (B_TRUE);
2203 if (strchr(name, '%') != NULL)
2204 return (B_TRUE);
2205 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL))
2206 return (B_TRUE);
2207 return (B_FALSE);
2208 }
2209
2210 /*
2211 * inputs:
2212 * zc_name name of filesystem
2213 * zc_cookie zap cursor
2214 * zc_nvlist_dst_size size of buffer for property nvlist
2215 *
2216 * outputs:
2217 * zc_name name of next filesystem
2218 * zc_cookie zap cursor
2219 * zc_objset_stats stats
2220 * zc_nvlist_dst property nvlist
2221 * zc_nvlist_dst_size size of property nvlist
2222 */
2223 static int
2224 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
2225 {
2226 objset_t *os;
2227 int error;
2228 char *p;
2229 size_t orig_len = strlen(zc->zc_name);
2230
2231 top:
2232 if (error = dmu_objset_hold(zc->zc_name, FTAG, &os)) {
2233 if (error == ENOENT)
2234 error = SET_ERROR(ESRCH);
2235 return (error);
2236 }
2237
2238 p = strrchr(zc->zc_name, '/');
2239 if (p == NULL || p[1] != '\0')
2240 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
2241 p = zc->zc_name + strlen(zc->zc_name);
2242
2243 do {
2244 error = dmu_dir_list_next(os,
2245 sizeof (zc->zc_name) - (p - zc->zc_name), p,
2246 NULL, &zc->zc_cookie);
2247 if (error == ENOENT)
2248 error = SET_ERROR(ESRCH);
2249 } while (error == 0 && dataset_name_hidden(zc->zc_name));
2250 dmu_objset_rele(os, FTAG);
2251
2252 /*
2253 * If it's an internal dataset (ie. with a '$' in its name),
2254 * don't try to get stats for it, otherwise we'll return ENOENT.
2255 */
2256 if (error == 0 && strchr(zc->zc_name, '$') == NULL) {
2257 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
2258 if (error == ENOENT) {
2259 /* We lost a race with destroy, get the next one. */
2260 zc->zc_name[orig_len] = '\0';
2261 goto top;
2262 }
2263 }
2264 return (error);
2265 }
2266
2267 /*
2268 * inputs:
2269 * zc_name name of filesystem
2270 * zc_cookie zap cursor
2271 * zc_nvlist_dst_size size of buffer for property nvlist
2272 *
2273 * outputs:
2274 * zc_name name of next snapshot
2275 * zc_objset_stats stats
2276 * zc_nvlist_dst property nvlist
2277 * zc_nvlist_dst_size size of property nvlist
2278 */
2279 static int
2280 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
2281 {
2282 objset_t *os;
2283 int error;
2284
2285 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
2286 if (error != 0) {
2287 return (error == ENOENT ? ESRCH : error);
2288 }
2289
2290 /*
2291 * A dataset name of maximum length cannot have any snapshots,
2292 * so exit immediately.
2293 */
2294 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
2295 dmu_objset_rele(os, FTAG);
2296 return (SET_ERROR(ESRCH));
2297 }
2298
2299 error = dmu_snapshot_list_next(os,
2300 sizeof (zc->zc_name) - strlen(zc->zc_name),
2301 zc->zc_name + strlen(zc->zc_name), &zc->zc_obj, &zc->zc_cookie,
2302 NULL);
2303
2304 if (error == 0) {
2305 dsl_dataset_t *ds;
2306 dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
2307
2308 error = dsl_dataset_hold_obj(dp, zc->zc_obj, FTAG, &ds);
2309 if (error == 0) {
2310 objset_t *ossnap;
2311
2312 error = dmu_objset_from_ds(ds, &ossnap);
2313 if (error == 0)
2314 error = zfs_ioc_objset_stats_impl(zc, ossnap);
2315 dsl_dataset_rele(ds, FTAG);
2316 }
2317 } else if (error == ENOENT) {
2318 error = SET_ERROR(ESRCH);
2319 }
2320
2321 dmu_objset_rele(os, FTAG);
2322 /* if we failed, undo the @ that we tacked on to zc_name */
2323 if (error != 0)
2324 *strchr(zc->zc_name, '@') = '\0';
2325 return (error);
2326 }
2327
2328 static int
2329 zfs_prop_set_userquota(const char *dsname, nvpair_t *pair)
2330 {
2331 const char *propname = nvpair_name(pair);
2332 uint64_t *valary;
2333 unsigned int vallen;
2334 const char *domain;
2335 char *dash;
2336 zfs_userquota_prop_t type;
2337 uint64_t rid;
2338 uint64_t quota;
2339 zfsvfs_t *zfsvfs;
2340 int err;
2341
2342 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2343 nvlist_t *attrs;
2344 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2345 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2346 &pair) != 0)
2347 return (SET_ERROR(EINVAL));
2348 }
2349
2350 /*
2351 * A correctly constructed propname is encoded as
2352 * userquota@<rid>-<domain>.
2353 */
2354 if ((dash = strchr(propname, '-')) == NULL ||
2355 nvpair_value_uint64_array(pair, &valary, &vallen) != 0 ||
2356 vallen != 3)
2357 return (SET_ERROR(EINVAL));
2358
2359 domain = dash + 1;
2360 type = valary[0];
2361 rid = valary[1];
2362 quota = valary[2];
2363
2364 err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_FALSE);
2365 if (err == 0) {
2366 err = zfs_set_userquota(zfsvfs, type, domain, rid, quota);
2367 zfsvfs_rele(zfsvfs, FTAG);
2368 }
2369
2370 return (err);
2371 }
2372
2373 /*
2374 * If the named property is one that has a special function to set its value,
2375 * return 0 on success and a positive error code on failure; otherwise if it is
2376 * not one of the special properties handled by this function, return -1.
2377 *
2378 * XXX: It would be better for callers of the property interface if we handled
2379 * these special cases in dsl_prop.c (in the dsl layer).
2380 */
2381 static int
2382 zfs_prop_set_special(const char *dsname, zprop_source_t source,
2383 nvpair_t *pair)
2384 {
2385 const char *propname = nvpair_name(pair);
2386 zfs_prop_t prop = zfs_name_to_prop(propname);
2387 uint64_t intval;
2388 int err = -1;
2389
2390 if (prop == ZPROP_INVAL) {
2391 if (zfs_prop_userquota(propname))
2392 return (zfs_prop_set_userquota(dsname, pair));
2393 return (-1);
2394 }
2395
2396 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2397 nvlist_t *attrs;
2398 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
2399 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2400 &pair) == 0);
2401 }
2402
2403 if (zfs_prop_get_type(prop) == PROP_TYPE_STRING)
2404 return (-1);
2405
2406 VERIFY(0 == nvpair_value_uint64(pair, &intval));
2407
2408 switch (prop) {
2409 case ZFS_PROP_QUOTA:
2410 err = dsl_dir_set_quota(dsname, source, intval);
2411 break;
2412 case ZFS_PROP_REFQUOTA:
2413 err = dsl_dataset_set_refquota(dsname, source, intval);
2414 break;
2415 case ZFS_PROP_FILESYSTEM_LIMIT:
2416 case ZFS_PROP_SNAPSHOT_LIMIT:
2417 if (intval == UINT64_MAX) {
2418 /* clearing the limit, just do it */
2419 err = 0;
2420 } else {
2421 err = dsl_dir_activate_fs_ss_limit(dsname);
2422 }
2423 /*
2424 * Set err to -1 to force the zfs_set_prop_nvlist code down the
2425 * default path to set the value in the nvlist.
2426 */
2427 if (err == 0)
2428 err = -1;
2429 break;
2430 case ZFS_PROP_RESERVATION:
2431 err = dsl_dir_set_reservation(dsname, source, intval);
2432 break;
2433 case ZFS_PROP_REFRESERVATION:
2434 err = dsl_dataset_set_refreservation(dsname, source, intval);
2435 break;
2436 case ZFS_PROP_VOLSIZE:
2437 err = zvol_set_volsize(dsname, intval);
2438 break;
2439 case ZFS_PROP_VERSION:
2440 {
2441 zfsvfs_t *zfsvfs;
2442
2443 if ((err = zfsvfs_hold(dsname, FTAG, &zfsvfs, B_TRUE)) != 0)
2444 break;
2445
2446 err = zfs_set_version(zfsvfs, intval);
2447 zfsvfs_rele(zfsvfs, FTAG);
2448
2449 if (err == 0 && intval >= ZPL_VERSION_USERSPACE) {
2450 zfs_cmd_t *zc;
2451
2452 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2453 (void) strcpy(zc->zc_name, dsname);
2454 (void) zfs_ioc_userspace_upgrade(zc);
2455 kmem_free(zc, sizeof (zfs_cmd_t));
2456 }
2457 break;
2458 }
2459 default:
2460 err = -1;
2461 }
2462
2463 return (err);
2464 }
2465
2466 /*
2467 * This function is best effort. If it fails to set any of the given properties,
2468 * it continues to set as many as it can and returns the last error
2469 * encountered. If the caller provides a non-NULL errlist, it will be filled in
2470 * with the list of names of all the properties that failed along with the
2471 * corresponding error numbers.
2472 *
2473 * If every property is set successfully, zero is returned and errlist is not
2474 * modified.
2475 */
2476 int
2477 zfs_set_prop_nvlist(const char *dsname, zprop_source_t source, nvlist_t *nvl,
2478 nvlist_t *errlist)
2479 {
2480 nvpair_t *pair;
2481 nvpair_t *propval;
2482 int rv = 0;
2483 uint64_t intval;
2484 char *strval;
2485 nvlist_t *genericnvl = fnvlist_alloc();
2486 nvlist_t *retrynvl = fnvlist_alloc();
2487
2488 retry:
2489 pair = NULL;
2490 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2491 const char *propname = nvpair_name(pair);
2492 zfs_prop_t prop = zfs_name_to_prop(propname);
2493 int err = 0;
2494
2495 /* decode the property value */
2496 propval = pair;
2497 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2498 nvlist_t *attrs;
2499 attrs = fnvpair_value_nvlist(pair);
2500 if (nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
2501 &propval) != 0)
2502 err = SET_ERROR(EINVAL);
2503 }
2504
2505 /* Validate value type */
2506 if (err == 0 && prop == ZPROP_INVAL) {
2507 if (zfs_prop_user(propname)) {
2508 if (nvpair_type(propval) != DATA_TYPE_STRING)
2509 err = SET_ERROR(EINVAL);
2510 } else if (zfs_prop_userquota(propname)) {
2511 if (nvpair_type(propval) !=
2512 DATA_TYPE_UINT64_ARRAY)
2513 err = SET_ERROR(EINVAL);
2514 } else {
2515 err = SET_ERROR(EINVAL);
2516 }
2517 } else if (err == 0) {
2518 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2519 if (zfs_prop_get_type(prop) != PROP_TYPE_STRING)
2520 err = SET_ERROR(EINVAL);
2521 } else if (nvpair_type(propval) == DATA_TYPE_UINT64) {
2522 const char *unused;
2523
2524 intval = fnvpair_value_uint64(propval);
2525
2526 switch (zfs_prop_get_type(prop)) {
2527 case PROP_TYPE_NUMBER:
2528 break;
2529 case PROP_TYPE_STRING:
2530 err = SET_ERROR(EINVAL);
2531 break;
2532 case PROP_TYPE_INDEX:
2533 if (zfs_prop_index_to_string(prop,
2534 intval, &unused) != 0)
2535 err = SET_ERROR(EINVAL);
2536 break;
2537 default:
2538 cmn_err(CE_PANIC,
2539 "unknown property type");
2540 }
2541 } else {
2542 err = SET_ERROR(EINVAL);
2543 }
2544 }
2545
2546 /* Validate permissions */
2547 if (err == 0)
2548 err = zfs_check_settable(dsname, pair, CRED());
2549
2550 if (err == 0) {
2551 err = zfs_prop_set_special(dsname, source, pair);
2552 if (err == -1) {
2553 /*
2554 * For better performance we build up a list of
2555 * properties to set in a single transaction.
2556 */
2557 err = nvlist_add_nvpair(genericnvl, pair);
2558 } else if (err != 0 && nvl != retrynvl) {
2559 /*
2560 * This may be a spurious error caused by
2561 * receiving quota and reservation out of order.
2562 * Try again in a second pass.
2563 */
2564 err = nvlist_add_nvpair(retrynvl, pair);
2565 }
2566 }
2567
2568 if (err != 0) {
2569 if (errlist != NULL)
2570 fnvlist_add_int32(errlist, propname, err);
2571 rv = err;
2572 }
2573 }
2574
2575 if (nvl != retrynvl && !nvlist_empty(retrynvl)) {
2576 nvl = retrynvl;
2577 goto retry;
2578 }
2579
2580 if (!nvlist_empty(genericnvl) &&
2581 dsl_props_set(dsname, source, genericnvl) != 0) {
2582 /*
2583 * If this fails, we still want to set as many properties as we
2584 * can, so try setting them individually.
2585 */
2586 pair = NULL;
2587 while ((pair = nvlist_next_nvpair(genericnvl, pair)) != NULL) {
2588 const char *propname = nvpair_name(pair);
2589 int err = 0;
2590
2591 propval = pair;
2592 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
2593 nvlist_t *attrs;
2594 attrs = fnvpair_value_nvlist(pair);
2595 propval = fnvlist_lookup_nvpair(attrs,
2596 ZPROP_VALUE);
2597 }
2598
2599 if (nvpair_type(propval) == DATA_TYPE_STRING) {
2600 strval = fnvpair_value_string(propval);
2601 err = dsl_prop_set_string(dsname, propname,
2602 source, strval);
2603 } else {
2604 intval = fnvpair_value_uint64(propval);
2605 err = dsl_prop_set_int(dsname, propname, source,
2606 intval);
2607 }
2608
2609 if (err != 0) {
2610 if (errlist != NULL) {
2611 fnvlist_add_int32(errlist, propname,
2612 err);
2613 }
2614 rv = err;
2615 }
2616 }
2617 }
2618 nvlist_free(genericnvl);
2619 nvlist_free(retrynvl);
2620
2621 return (rv);
2622 }
2623
2624 /*
2625 * Check that all the properties are valid user properties.
2626 */
2627 static int
2628 zfs_check_userprops(const char *fsname, nvlist_t *nvl)
2629 {
2630 nvpair_t *pair = NULL;
2631 int error = 0;
2632
2633 while ((pair = nvlist_next_nvpair(nvl, pair)) != NULL) {
2634 const char *propname = nvpair_name(pair);
2635
2636 if (!zfs_prop_user(propname) ||
2637 nvpair_type(pair) != DATA_TYPE_STRING)
2638 return (SET_ERROR(EINVAL));
2639
2640 if (error = zfs_secpolicy_write_perms(fsname,
2641 ZFS_DELEG_PERM_USERPROP, CRED()))
2642 return (error);
2643
2644 if (strlen(propname) >= ZAP_MAXNAMELEN)
2645 return (SET_ERROR(ENAMETOOLONG));
2646
2647 if (strlen(fnvpair_value_string(pair)) >= ZAP_MAXVALUELEN)
2648 return (E2BIG);
2649 }
2650 return (0);
2651 }
2652
2653 static void
2654 props_skip(nvlist_t *props, nvlist_t *skipped, nvlist_t **newprops)
2655 {
2656 nvpair_t *pair;
2657
2658 VERIFY(nvlist_alloc(newprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2659
2660 pair = NULL;
2661 while ((pair = nvlist_next_nvpair(props, pair)) != NULL) {
2662 if (nvlist_exists(skipped, nvpair_name(pair)))
2663 continue;
2664
2665 VERIFY(nvlist_add_nvpair(*newprops, pair) == 0);
2666 }
2667 }
2668
2669 static int
2670 clear_received_props(const char *dsname, nvlist_t *props,
2671 nvlist_t *skipped)
2672 {
2673 int err = 0;
2674 nvlist_t *cleared_props = NULL;
2675 props_skip(props, skipped, &cleared_props);
2676 if (!nvlist_empty(cleared_props)) {
2677 /*
2678 * Acts on local properties until the dataset has received
2679 * properties at least once on or after SPA_VERSION_RECVD_PROPS.
2680 */
2681 zprop_source_t flags = (ZPROP_SRC_NONE |
2682 (dsl_prop_get_hasrecvd(dsname) ? ZPROP_SRC_RECEIVED : 0));
2683 err = zfs_set_prop_nvlist(dsname, flags, cleared_props, NULL);
2684 }
2685 nvlist_free(cleared_props);
2686 return (err);
2687 }
2688
2689 /*
2690 * inputs:
2691 * zc_name name of filesystem
2692 * zc_value name of property to set
2693 * zc_nvlist_src{_size} nvlist of properties to apply
2694 * zc_cookie received properties flag
2695 *
2696 * outputs:
2697 * zc_nvlist_dst{_size} error for each unapplied received property
2698 */
2699 static int
2700 zfs_ioc_set_prop(zfs_cmd_t *zc)
2701 {
2702 nvlist_t *nvl;
2703 boolean_t received = zc->zc_cookie;
2704 zprop_source_t source = (received ? ZPROP_SRC_RECEIVED :
2705 ZPROP_SRC_LOCAL);
2706 nvlist_t *errors;
2707 int error;
2708
2709 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2710 zc->zc_iflags, &nvl)) != 0)
2711 return (error);
2712
2713 if (received) {
2714 nvlist_t *origprops;
2715
2716 if (dsl_prop_get_received(zc->zc_name, &origprops) == 0) {
2717 (void) clear_received_props(zc->zc_name,
2718 origprops, nvl);
2719 nvlist_free(origprops);
2720 }
2721
2722 error = dsl_prop_set_hasrecvd(zc->zc_name);
2723 }
2724
2725 errors = fnvlist_alloc();
2726 if (error == 0)
2727 error = zfs_set_prop_nvlist(zc->zc_name, source, nvl, errors);
2728
2729 if (zc->zc_nvlist_dst != NULL && errors != NULL) {
2730 (void) put_nvlist(zc, errors);
2731 }
2732
2733 nvlist_free(errors);
2734 nvlist_free(nvl);
2735 return (error);
2736 }
2737
2738 /*
2739 * inputs:
2740 * zc_name name of filesystem
2741 * zc_value name of property to inherit
2742 * zc_cookie revert to received value if TRUE
2743 *
2744 * outputs: none
2745 */
2746 static int
2747 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
2748 {
2749 const char *propname = zc->zc_value;
2750 zfs_prop_t prop = zfs_name_to_prop(propname);
2751 boolean_t received = zc->zc_cookie;
2752 zprop_source_t source = (received
2753 ? ZPROP_SRC_NONE /* revert to received value, if any */
2754 : ZPROP_SRC_INHERITED); /* explicitly inherit */
2755
2756 if (received) {
2757 nvlist_t *dummy;
2758 nvpair_t *pair;
2759 zprop_type_t type;
2760 int err;
2761
2762 /*
2763 * zfs_prop_set_special() expects properties in the form of an
2764 * nvpair with type info.
2765 */
2766 if (prop == ZPROP_INVAL) {
2767 if (!zfs_prop_user(propname))
2768 return (SET_ERROR(EINVAL));
2769
2770 type = PROP_TYPE_STRING;
2771 } else if (prop == ZFS_PROP_VOLSIZE ||
2772 prop == ZFS_PROP_VERSION) {
2773 return (SET_ERROR(EINVAL));
2774 } else {
2775 type = zfs_prop_get_type(prop);
2776 }
2777
2778 VERIFY(nvlist_alloc(&dummy, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2779
2780 switch (type) {
2781 case PROP_TYPE_STRING:
2782 VERIFY(0 == nvlist_add_string(dummy, propname, ""));
2783 break;
2784 case PROP_TYPE_NUMBER:
2785 case PROP_TYPE_INDEX:
2786 VERIFY(0 == nvlist_add_uint64(dummy, propname, 0));
2787 break;
2788 default:
2789 nvlist_free(dummy);
2790 return (SET_ERROR(EINVAL));
2791 }
2792
2793 pair = nvlist_next_nvpair(dummy, NULL);
2794 err = zfs_prop_set_special(zc->zc_name, source, pair);
2795 nvlist_free(dummy);
2796 if (err != -1)
2797 return (err); /* special property already handled */
2798 } else {
2799 /*
2800 * Only check this in the non-received case. We want to allow
2801 * 'inherit -S' to revert non-inheritable properties like quota
2802 * and reservation to the received or default values even though
2803 * they are not considered inheritable.
2804 */
2805 if (prop != ZPROP_INVAL && !zfs_prop_inheritable(prop))
2806 return (SET_ERROR(EINVAL));
2807 }
2808
2809 /* property name has been validated by zfs_secpolicy_inherit_prop() */
2810 return (dsl_prop_inherit(zc->zc_name, zc->zc_value, source));
2811 }
2812
2813 static int
2814 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
2815 {
2816 nvlist_t *props;
2817 spa_t *spa;
2818 int error;
2819 nvpair_t *pair;
2820
2821 if (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2822 zc->zc_iflags, &props))
2823 return (error);
2824
2825 /*
2826 * If the only property is the configfile, then just do a spa_lookup()
2827 * to handle the faulted case.
2828 */
2829 pair = nvlist_next_nvpair(props, NULL);
2830 if (pair != NULL && strcmp(nvpair_name(pair),
2831 zpool_prop_to_name(ZPOOL_PROP_CACHEFILE)) == 0 &&
2832 nvlist_next_nvpair(props, pair) == NULL) {
2833 mutex_enter(&spa_namespace_lock);
2834 if ((spa = spa_lookup(zc->zc_name)) != NULL) {
2835 spa_configfile_set(spa, props, B_FALSE);
2836 spa_config_sync(spa, B_FALSE, B_TRUE);
2837 }
2838 mutex_exit(&spa_namespace_lock);
2839 if (spa != NULL) {
2840 nvlist_free(props);
2841 return (0);
2842 }
2843 }
2844
2845 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2846 nvlist_free(props);
2847 return (error);
2848 }
2849
2850 error = spa_prop_set(spa, props);
2851
2852 nvlist_free(props);
2853 spa_close(spa, FTAG);
2854
2855 return (error);
2856 }
2857
2858 static int
2859 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
2860 {
2861 spa_t *spa;
2862 int error;
2863 nvlist_t *nvp = NULL;
2864
2865 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
2866 /*
2867 * If the pool is faulted, there may be properties we can still
2868 * get (such as altroot and cachefile), so attempt to get them
2869 * anyway.
2870 */
2871 mutex_enter(&spa_namespace_lock);
2872 if ((spa = spa_lookup(zc->zc_name)) != NULL)
2873 error = spa_prop_get(spa, &nvp);
2874 mutex_exit(&spa_namespace_lock);
2875 } else {
2876 error = spa_prop_get(spa, &nvp);
2877 spa_close(spa, FTAG);
2878 }
2879
2880 if (error == 0 && zc->zc_nvlist_dst != NULL)
2881 error = put_nvlist(zc, nvp);
2882 else
2883 error = SET_ERROR(EFAULT);
2884
2885 nvlist_free(nvp);
2886 return (error);
2887 }
2888
2889 /*
2890 * inputs:
2891 * zc_name name of filesystem
2892 * zc_nvlist_src{_size} nvlist of delegated permissions
2893 * zc_perm_action allow/unallow flag
2894 *
2895 * outputs: none
2896 */
2897 static int
2898 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
2899 {
2900 int error;
2901 nvlist_t *fsaclnv = NULL;
2902
2903 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2904 zc->zc_iflags, &fsaclnv)) != 0)
2905 return (error);
2906
2907 /*
2908 * Verify nvlist is constructed correctly
2909 */
2910 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
2911 nvlist_free(fsaclnv);
2912 return (SET_ERROR(EINVAL));
2913 }
2914
2915 /*
2916 * If we don't have PRIV_SYS_MOUNT, then validate
2917 * that user is allowed to hand out each permission in
2918 * the nvlist(s)
2919 */
2920
2921 error = secpolicy_zfs(CRED());
2922 if (error != 0) {
2923 if (zc->zc_perm_action == B_FALSE) {
2924 error = dsl_deleg_can_allow(zc->zc_name,
2925 fsaclnv, CRED());
2926 } else {
2927 error = dsl_deleg_can_unallow(zc->zc_name,
2928 fsaclnv, CRED());
2929 }
2930 }
2931
2932 if (error == 0)
2933 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
2934
2935 nvlist_free(fsaclnv);
2936 return (error);
2937 }
2938
2939 /*
2940 * inputs:
2941 * zc_name name of filesystem
2942 *
2943 * outputs:
2944 * zc_nvlist_src{_size} nvlist of delegated permissions
2945 */
2946 static int
2947 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
2948 {
2949 nvlist_t *nvp;
2950 int error;
2951
2952 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
2953 error = put_nvlist(zc, nvp);
2954 nvlist_free(nvp);
2955 }
2956
2957 return (error);
2958 }
2959
2960 /*
2961 * Search the vfs list for a specified resource. Returns a pointer to it
2962 * or NULL if no suitable entry is found. The caller of this routine
2963 * is responsible for releasing the returned vfs pointer.
2964 */
2965 static vfs_t *
2966 zfs_get_vfs(const char *resource)
2967 {
2968 struct vfs *vfsp;
2969 struct vfs *vfs_found = NULL;
2970
2971 vfs_list_read_lock();
2972 vfsp = rootvfs;
2973 do {
2974 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
2975 VFS_HOLD(vfsp);
2976 vfs_found = vfsp;
2977 break;
2978 }
2979 vfsp = vfsp->vfs_next;
2980 } while (vfsp != rootvfs);
2981 vfs_list_unlock();
2982 return (vfs_found);
2983 }
2984
2985 /* ARGSUSED */
2986 static void
2987 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
2988 {
2989 zfs_creat_t *zct = arg;
2990
2991 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
2992 }
2993
2994 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
2995
2996 /*
2997 * inputs:
2998 * os parent objset pointer (NULL if root fs)
2999 * fuids_ok fuids allowed in this version of the spa?
3000 * sa_ok SAs allowed in this version of the spa?
3001 * createprops list of properties requested by creator
3002 *
3003 * outputs:
3004 * zplprops values for the zplprops we attach to the master node object
3005 * is_ci true if requested file system will be purely case-insensitive
3006 *
3007 * Determine the settings for utf8only, normalization and
3008 * casesensitivity. Specific values may have been requested by the
3009 * creator and/or we can inherit values from the parent dataset. If
3010 * the file system is of too early a vintage, a creator can not
3011 * request settings for these properties, even if the requested
3012 * setting is the default value. We don't actually want to create dsl
3013 * properties for these, so remove them from the source nvlist after
3014 * processing.
3015 */
3016 static int
3017 zfs_fill_zplprops_impl(objset_t *os, uint64_t zplver,
3018 boolean_t fuids_ok, boolean_t sa_ok, nvlist_t *createprops,
3019 nvlist_t *zplprops, boolean_t *is_ci)
3020 {
3021 uint64_t sense = ZFS_PROP_UNDEFINED;
3022 uint64_t norm = ZFS_PROP_UNDEFINED;
3023 uint64_t u8 = ZFS_PROP_UNDEFINED;
3024
3025 ASSERT(zplprops != NULL);
3026
3027 /*
3028 * Pull out creator prop choices, if any.
3029 */
3030 if (createprops) {
3031 (void) nvlist_lookup_uint64(createprops,
3032 zfs_prop_to_name(ZFS_PROP_VERSION), &zplver);
3033 (void) nvlist_lookup_uint64(createprops,
3034 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
3035 (void) nvlist_remove_all(createprops,
3036 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
3037 (void) nvlist_lookup_uint64(createprops,
3038 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
3039 (void) nvlist_remove_all(createprops,
3040 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
3041 (void) nvlist_lookup_uint64(createprops,
3042 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
3043 (void) nvlist_remove_all(createprops,
3044 zfs_prop_to_name(ZFS_PROP_CASE));
3045 }
3046
3047 /*
3048 * If the zpl version requested is whacky or the file system
3049 * or pool is version is too "young" to support normalization
3050 * and the creator tried to set a value for one of the props,
3051 * error out.
3052 */
3053 if ((zplver < ZPL_VERSION_INITIAL || zplver > ZPL_VERSION) ||
3054 (zplver >= ZPL_VERSION_FUID && !fuids_ok) ||
3055 (zplver >= ZPL_VERSION_SA && !sa_ok) ||
3056 (zplver < ZPL_VERSION_NORMALIZATION &&
3057 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
3058 sense != ZFS_PROP_UNDEFINED)))
3059 return (SET_ERROR(ENOTSUP));
3060
3061 /*
3062 * Put the version in the zplprops
3063 */
3064 VERIFY(nvlist_add_uint64(zplprops,
3065 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
3066
3067 if (norm == ZFS_PROP_UNDEFINED)
3068 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
3069 VERIFY(nvlist_add_uint64(zplprops,
3070 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
3071
3072 /*
3073 * If we're normalizing, names must always be valid UTF-8 strings.
3074 */
3075 if (norm)
3076 u8 = 1;
3077 if (u8 == ZFS_PROP_UNDEFINED)
3078 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
3079 VERIFY(nvlist_add_uint64(zplprops,
3080 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
3081
3082 if (sense == ZFS_PROP_UNDEFINED)
3083 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
3084 VERIFY(nvlist_add_uint64(zplprops,
3085 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
3086
3087 if (is_ci)
3088 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
3089
3090 return (0);
3091 }
3092
3093 static int
3094 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
3095 nvlist_t *zplprops, boolean_t *is_ci)
3096 {
3097 boolean_t fuids_ok, sa_ok;
3098 uint64_t zplver = ZPL_VERSION;
3099 objset_t *os = NULL;
3100 char parentname[MAXNAMELEN];
3101 char *cp;
3102 spa_t *spa;
3103 uint64_t spa_vers;
3104 int error;
3105
3106 (void) strlcpy(parentname, dataset, sizeof (parentname));
3107 cp = strrchr(parentname, '/');
3108 ASSERT(cp != NULL);
3109 cp[0] = '\0';
3110
3111 if ((error = spa_open(dataset, &spa, FTAG)) != 0)
3112 return (error);
3113
3114 spa_vers = spa_version(spa);
3115 spa_close(spa, FTAG);
3116
3117 zplver = zfs_zpl_version_map(spa_vers);
3118 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3119 sa_ok = (zplver >= ZPL_VERSION_SA);
3120
3121 /*
3122 * Open parent object set so we can inherit zplprop values.
3123 */
3124 if ((error = dmu_objset_hold(parentname, FTAG, &os)) != 0)
3125 return (error);
3126
3127 error = zfs_fill_zplprops_impl(os, zplver, fuids_ok, sa_ok, createprops,
3128 zplprops, is_ci);
3129 dmu_objset_rele(os, FTAG);
3130 return (error);
3131 }
3132
3133 static int
3134 zfs_fill_zplprops_root(uint64_t spa_vers, nvlist_t *createprops,
3135 nvlist_t *zplprops, boolean_t *is_ci)
3136 {
3137 boolean_t fuids_ok;
3138 boolean_t sa_ok;
3139 uint64_t zplver = ZPL_VERSION;
3140 int error;
3141
3142 zplver = zfs_zpl_version_map(spa_vers);
3143 fuids_ok = (zplver >= ZPL_VERSION_FUID);
3144 sa_ok = (zplver >= ZPL_VERSION_SA);
3145
3146 error = zfs_fill_zplprops_impl(NULL, zplver, fuids_ok, sa_ok,
3147 createprops, zplprops, is_ci);
3148 return (error);
3149 }
3150
3151 /*
3152 * innvl: {
3153 * "type" -> dmu_objset_type_t (int32)
3154 * (optional) "props" -> { prop -> value }
3155 * }
3156 *
3157 * outnvl: propname -> error code (int32)
3158 */
3159 static int
3160 zfs_ioc_create(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3161 {
3162 int error = 0;
3163 zfs_creat_t zct = { 0 };
3164 nvlist_t *nvprops = NULL;
3165 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
3166 int32_t type32;
3167 dmu_objset_type_t type;
3168 boolean_t is_insensitive = B_FALSE;
3169
3170 if (nvlist_lookup_int32(innvl, "type", &type32) != 0)
3171 return (SET_ERROR(EINVAL));
3172 type = type32;
3173 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3174
3175 switch (type) {
3176 case DMU_OST_ZFS:
3177 cbfunc = zfs_create_cb;
3178 break;
3179
3180 case DMU_OST_ZVOL:
3181 cbfunc = zvol_create_cb;
3182 break;
3183
3184 default:
3185 cbfunc = NULL;
3186 break;
3187 }
3188 if (strchr(fsname, '@') ||
3189 strchr(fsname, '%'))
3190 return (SET_ERROR(EINVAL));
3191
3192 zct.zct_props = nvprops;
3193
3194 if (cbfunc == NULL)
3195 return (SET_ERROR(EINVAL));
3196
3197 if (type == DMU_OST_ZVOL) {
3198 uint64_t volsize, volblocksize;
3199
3200 if (nvprops == NULL)
3201 return (SET_ERROR(EINVAL));
3202 if (nvlist_lookup_uint64(nvprops,
3203 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &volsize) != 0)
3204 return (SET_ERROR(EINVAL));
3205
3206 if ((error = nvlist_lookup_uint64(nvprops,
3207 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3208 &volblocksize)) != 0 && error != ENOENT)
3209 return (SET_ERROR(EINVAL));
3210
3211 if (error != 0)
3212 volblocksize = zfs_prop_default_numeric(
3213 ZFS_PROP_VOLBLOCKSIZE);
3214
3215 if ((error = zvol_check_volblocksize(
3216 volblocksize)) != 0 ||
3217 (error = zvol_check_volsize(volsize,
3218 volblocksize)) != 0)
3219 return (error);
3220 } else if (type == DMU_OST_ZFS) {
3221 int error;
3222
3223 /*
3224 * We have to have normalization and
3225 * case-folding flags correct when we do the
3226 * file system creation, so go figure them out
3227 * now.
3228 */
3229 VERIFY(nvlist_alloc(&zct.zct_zplprops,
3230 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3231 error = zfs_fill_zplprops(fsname, nvprops,
3232 zct.zct_zplprops, &is_insensitive);
3233 if (error != 0) {
3234 nvlist_free(zct.zct_zplprops);
3235 return (error);
3236 }
3237 }
3238
3239 error = dmu_objset_create(fsname, type,
3240 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
3241 nvlist_free(zct.zct_zplprops);
3242
3243 /*
3244 * It would be nice to do this atomically.
3245 */
3246 if (error == 0) {
3247 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3248 nvprops, outnvl);
3249 if (error != 0)
3250 (void) dsl_destroy_head(fsname);
3251 }
3252 return (error);
3253 }
3254
3255 /*
3256 * innvl: {
3257 * "origin" -> name of origin snapshot
3258 * (optional) "props" -> { prop -> value }
3259 * }
3260 *
3261 * outnvl: propname -> error code (int32)
3262 */
3263 static int
3264 zfs_ioc_clone(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3265 {
3266 int error = 0;
3267 nvlist_t *nvprops = NULL;
3268 char *origin_name;
3269
3270 if (nvlist_lookup_string(innvl, "origin", &origin_name) != 0)
3271 return (SET_ERROR(EINVAL));
3272 (void) nvlist_lookup_nvlist(innvl, "props", &nvprops);
3273
3274 if (strchr(fsname, '@') ||
3275 strchr(fsname, '%'))
3276 return (SET_ERROR(EINVAL));
3277
3278 if (dataset_namecheck(origin_name, NULL, NULL) != 0)
3279 return (SET_ERROR(EINVAL));
3280 error = dmu_objset_clone(fsname, origin_name);
3281 if (error != 0)
3282 return (error);
3283
3284 /*
3285 * It would be nice to do this atomically.
3286 */
3287 if (error == 0) {
3288 error = zfs_set_prop_nvlist(fsname, ZPROP_SRC_LOCAL,
3289 nvprops, outnvl);
3290 if (error != 0)
3291 (void) dsl_destroy_head(fsname);
3292 }
3293 return (error);
3294 }
3295
3296 /*
3297 * innvl: {
3298 * "snaps" -> { snapshot1, snapshot2 }
3299 * (optional) "props" -> { prop -> value (string) }
3300 * }
3301 *
3302 * outnvl: snapshot -> error code (int32)
3303 */
3304 static int
3305 zfs_ioc_snapshot(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3306 {
3307 nvlist_t *snaps;
3308 nvlist_t *props = NULL;
3309 int error, poollen;
3310 nvpair_t *pair;
3311
3312 (void) nvlist_lookup_nvlist(innvl, "props", &props);
3313 if ((error = zfs_check_userprops(poolname, props)) != 0)
3314 return (error);
3315
3316 if (!nvlist_empty(props) &&
3317 zfs_earlier_version(poolname, SPA_VERSION_SNAP_PROPS))
3318 return (SET_ERROR(ENOTSUP));
3319
3320 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3321 return (SET_ERROR(EINVAL));
3322 poollen = strlen(poolname);
3323 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3324 pair = nvlist_next_nvpair(snaps, pair)) {
3325 const char *name = nvpair_name(pair);
3326 const char *cp = strchr(name, '@');
3327
3328 /*
3329 * The snap name must contain an @, and the part after it must
3330 * contain only valid characters.
3331 */
3332 if (cp == NULL ||
3333 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3334 return (SET_ERROR(EINVAL));
3335
3336 /*
3337 * The snap must be in the specified pool.
3338 */
3339 if (strncmp(name, poolname, poollen) != 0 ||
3340 (name[poollen] != '/' && name[poollen] != '@'))
3341 return (SET_ERROR(EXDEV));
3342
3343 /* This must be the only snap of this fs. */
3344 for (nvpair_t *pair2 = nvlist_next_nvpair(snaps, pair);
3345 pair2 != NULL; pair2 = nvlist_next_nvpair(snaps, pair2)) {
3346 if (strncmp(name, nvpair_name(pair2), cp - name + 1)
3347 == 0) {
3348 return (SET_ERROR(EXDEV));
3349 }
3350 }
3351 }
3352
3353 error = dsl_dataset_snapshot(snaps, props, outnvl);
3354 return (error);
3355 }
3356
3357 /*
3358 * innvl: "message" -> string
3359 */
3360 /* ARGSUSED */
3361 static int
3362 zfs_ioc_log_history(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
3363 {
3364 char *message;
3365 spa_t *spa;
3366 int error;
3367 char *poolname;
3368
3369 /*
3370 * The poolname in the ioctl is not set, we get it from the TSD,
3371 * which was set at the end of the last successful ioctl that allows
3372 * logging. The secpolicy func already checked that it is set.
3373 * Only one log ioctl is allowed after each successful ioctl, so
3374 * we clear the TSD here.
3375 */
3376 poolname = tsd_get(zfs_allow_log_key);
3377 (void) tsd_set(zfs_allow_log_key, NULL);
3378 error = spa_open(poolname, &spa, FTAG);
3379 strfree(poolname);
3380 if (error != 0)
3381 return (error);
3382
3383 if (nvlist_lookup_string(innvl, "message", &message) != 0) {
3384 spa_close(spa, FTAG);
3385 return (SET_ERROR(EINVAL));
3386 }
3387
3388 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
3389 spa_close(spa, FTAG);
3390 return (SET_ERROR(ENOTSUP));
3391 }
3392
3393 error = spa_history_log(spa, message);
3394 spa_close(spa, FTAG);
3395 return (error);
3396 }
3397
3398 /*
3399 * The dp_config_rwlock must not be held when calling this, because the
3400 * unmount may need to write out data.
3401 *
3402 * This function is best-effort. Callers must deal gracefully if it
3403 * remains mounted (or is remounted after this call).
3404 *
3405 * Returns 0 if the argument is not a snapshot, or it is not currently a
3406 * filesystem, or we were able to unmount it. Returns error code otherwise.
3407 */
3408 int
3409 zfs_unmount_snap(const char *snapname)
3410 {
3411 vfs_t *vfsp;
3412 zfsvfs_t *zfsvfs;
3413 int err;
3414
3415 if (strchr(snapname, '@') == NULL)
3416 return (0);
3417
3418 vfsp = zfs_get_vfs(snapname);
3419 if (vfsp == NULL)
3420 return (0);
3421
3422 zfsvfs = vfsp->vfs_data;
3423 ASSERT(!dsl_pool_config_held(dmu_objset_pool(zfsvfs->z_os)));
3424
3425 err = vn_vfswlock(vfsp->vfs_vnodecovered);
3426 VFS_RELE(vfsp);
3427 if (err != 0)
3428 return (SET_ERROR(err));
3429
3430 /*
3431 * Always force the unmount for snapshots.
3432 */
3433 (void) dounmount(vfsp, MS_FORCE, kcred);
3434 return (0);
3435 }
3436
3437 /* ARGSUSED */
3438 static int
3439 zfs_unmount_snap_cb(const char *snapname, void *arg)
3440 {
3441 return (zfs_unmount_snap(snapname));
3442 }
3443
3444 /*
3445 * When a clone is destroyed, its origin may also need to be destroyed,
3446 * in which case it must be unmounted. This routine will do that unmount
3447 * if necessary.
3448 */
3449 void
3450 zfs_destroy_unmount_origin(const char *fsname)
3451 {
3452 int error;
3453 objset_t *os;
3454 dsl_dataset_t *ds;
3455
3456 error = dmu_objset_hold(fsname, FTAG, &os);
3457 if (error != 0)
3458 return;
3459 ds = dmu_objset_ds(os);
3460 if (dsl_dir_is_clone(ds->ds_dir) && DS_IS_DEFER_DESTROY(ds->ds_prev)) {
3461 char originname[MAXNAMELEN];
3462 dsl_dataset_name(ds->ds_prev, originname);
3463 dmu_objset_rele(os, FTAG);
3464 (void) zfs_unmount_snap(originname);
3465 } else {
3466 dmu_objset_rele(os, FTAG);
3467 }
3468 }
3469
3470 /*
3471 * innvl: {
3472 * "snaps" -> { snapshot1, snapshot2 }
3473 * (optional boolean) "defer"
3474 * }
3475 *
3476 * outnvl: snapshot -> error code (int32)
3477 *
3478 */
3479 /* ARGSUSED */
3480 static int
3481 zfs_ioc_destroy_snaps(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3482 {
3483 nvlist_t *snaps;
3484 nvpair_t *pair;
3485 boolean_t defer;
3486
3487 if (nvlist_lookup_nvlist(innvl, "snaps", &snaps) != 0)
3488 return (SET_ERROR(EINVAL));
3489 defer = nvlist_exists(innvl, "defer");
3490
3491 for (pair = nvlist_next_nvpair(snaps, NULL); pair != NULL;
3492 pair = nvlist_next_nvpair(snaps, pair)) {
3493 (void) zfs_unmount_snap(nvpair_name(pair));
3494 }
3495
3496 return (dsl_destroy_snapshots_nvl(snaps, defer, outnvl));
3497 }
3498
3499 /*
3500 * Create bookmarks. Bookmark names are of the form <fs>#<bmark>.
3501 * All bookmarks must be in the same pool.
3502 *
3503 * innvl: {
3504 * bookmark1 -> snapshot1, bookmark2 -> snapshot2
3505 * }
3506 *
3507 * outnvl: bookmark -> error code (int32)
3508 *
3509 */
3510 /* ARGSUSED */
3511 static int
3512 zfs_ioc_bookmark(const char *poolname, nvlist_t *innvl, nvlist_t *outnvl)
3513 {
3514 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3515 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3516 char *snap_name;
3517
3518 /*
3519 * Verify the snapshot argument.
3520 */
3521 if (nvpair_value_string(pair, &snap_name) != 0)
3522 return (SET_ERROR(EINVAL));
3523
3524
3525 /* Verify that the keys (bookmarks) are unique */
3526 for (nvpair_t *pair2 = nvlist_next_nvpair(innvl, pair);
3527 pair2 != NULL; pair2 = nvlist_next_nvpair(innvl, pair2)) {
3528 if (strcmp(nvpair_name(pair), nvpair_name(pair2)) == 0)
3529 return (SET_ERROR(EINVAL));
3530 }
3531 }
3532
3533 return (dsl_bookmark_create(innvl, outnvl));
3534 }
3535
3536 /*
3537 * innvl: {
3538 * property 1, property 2, ...
3539 * }
3540 *
3541 * outnvl: {
3542 * bookmark name 1 -> { property 1, property 2, ... },
3543 * bookmark name 2 -> { property 1, property 2, ... }
3544 * }
3545 *
3546 */
3547 static int
3548 zfs_ioc_get_bookmarks(const char *fsname, nvlist_t *innvl, nvlist_t *outnvl)
3549 {
3550 return (dsl_get_bookmarks(fsname, innvl, outnvl));
3551 }
3552
3553 /*
3554 * innvl: {
3555 * bookmark name 1, bookmark name 2
3556 * }
3557 *
3558 * outnvl: bookmark -> error code (int32)
3559 *
3560 */
3561 static int
3562 zfs_ioc_destroy_bookmarks(const char *poolname, nvlist_t *innvl,
3563 nvlist_t *outnvl)
3564 {
3565 int error, poollen;
3566
3567 poollen = strlen(poolname);
3568 for (nvpair_t *pair = nvlist_next_nvpair(innvl, NULL);
3569 pair != NULL; pair = nvlist_next_nvpair(innvl, pair)) {
3570 const char *name = nvpair_name(pair);
3571 const char *cp = strchr(name, '#');
3572
3573 /*
3574 * The bookmark name must contain an #, and the part after it
3575 * must contain only valid characters.
3576 */
3577 if (cp == NULL ||
3578 zfs_component_namecheck(cp + 1, NULL, NULL) != 0)
3579 return (SET_ERROR(EINVAL));
3580
3581 /*
3582 * The bookmark must be in the specified pool.
3583 */
3584 if (strncmp(name, poolname, poollen) != 0 ||
3585 (name[poollen] != '/' && name[poollen] != '#'))
3586 return (SET_ERROR(EXDEV));
3587 }
3588
3589 error = dsl_bookmark_destroy(innvl, outnvl);
3590 return (error);
3591 }
3592
3593 /*
3594 * inputs:
3595 * zc_name name of dataset to destroy
3596 * zc_objset_type type of objset
3597 * zc_defer_destroy mark for deferred destroy
3598 *
3599 * outputs: none
3600 */
3601 static int
3602 zfs_ioc_destroy(zfs_cmd_t *zc)
3603 {
3604 int err;
3605
3606 if (zc->zc_objset_type == DMU_OST_ZFS) {
3607 err = zfs_unmount_snap(zc->zc_name);
3608 if (err != 0)
3609 return (err);
3610 }
3611
3612 if (strchr(zc->zc_name, '@'))
3613 err = dsl_destroy_snapshot(zc->zc_name, zc->zc_defer_destroy);
3614 else
3615 err = dsl_destroy_head(zc->zc_name);
3616 if (zc->zc_objset_type == DMU_OST_ZVOL && err == 0)
3617 (void) zvol_remove_minor(zc->zc_name);
3618 return (err);
3619 }
3620
3621 /*
3622 * fsname is name of dataset to rollback (to most recent snapshot)
3623 *
3624 * innvl is not used.
3625 *
3626 * outnvl: "target" -> name of most recent snapshot
3627 * }
3628 */
3629 /* ARGSUSED */
3630 static int
3631 zfs_ioc_rollback(const char *fsname, nvlist_t *args, nvlist_t *outnvl)
3632 {
3633 zfsvfs_t *zfsvfs;
3634 int error;
3635
3636 if (getzfsvfs(fsname, &zfsvfs) == 0) {
3637 error = zfs_suspend_fs(zfsvfs);
3638 if (error == 0) {
3639 int resume_err;
3640
3641 error = dsl_dataset_rollback(fsname, zfsvfs, outnvl);
3642 resume_err = zfs_resume_fs(zfsvfs, fsname);
3643 error = error ? error : resume_err;
3644 }
3645 VFS_RELE(zfsvfs->z_vfs);
3646 } else {
3647 error = dsl_dataset_rollback(fsname, NULL, outnvl);
3648 }
3649 return (error);
3650 }
3651
3652 static int
3653 recursive_unmount(const char *fsname, void *arg)
3654 {
3655 const char *snapname = arg;
3656 char fullname[MAXNAMELEN];
3657
3658 (void) snprintf(fullname, sizeof (fullname), "%s@%s", fsname, snapname);
3659 return (zfs_unmount_snap(fullname));
3660 }
3661
3662 /*
3663 * inputs:
3664 * zc_name old name of dataset
3665 * zc_value new name of dataset
3666 * zc_cookie recursive flag (only valid for snapshots)
3667 *
3668 * outputs: none
3669 */
3670 static int
3671 zfs_ioc_rename(zfs_cmd_t *zc)
3672 {
3673 boolean_t recursive = zc->zc_cookie & 1;
3674 char *at;
3675
3676 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
3677 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
3678 strchr(zc->zc_value, '%'))
3679 return (SET_ERROR(EINVAL));
3680
3681 at = strchr(zc->zc_name, '@');
3682 if (at != NULL) {
3683 /* snaps must be in same fs */
3684 int error;
3685
3686 if (strncmp(zc->zc_name, zc->zc_value, at - zc->zc_name + 1))
3687 return (SET_ERROR(EXDEV));
3688 *at = '\0';
3689 if (zc->zc_objset_type == DMU_OST_ZFS) {
3690 error = dmu_objset_find(zc->zc_name,
3691 recursive_unmount, at + 1,
3692 recursive ? DS_FIND_CHILDREN : 0);
3693 if (error != 0) {
3694 *at = '@';
3695 return (error);
3696 }
3697 }
3698 error = dsl_dataset_rename_snapshot(zc->zc_name,
3699 at + 1, strchr(zc->zc_value, '@') + 1, recursive);
3700 *at = '@';
3701
3702 return (error);
3703 } else {
3704 if (zc->zc_objset_type == DMU_OST_ZVOL)
3705 (void) zvol_remove_minor(zc->zc_name);
3706 return (dsl_dir_rename(zc->zc_name, zc->zc_value));
3707 }
3708 }
3709
3710 static int
3711 zfs_check_settable(const char *dsname, nvpair_t *pair, cred_t *cr)
3712 {
3713 const char *propname = nvpair_name(pair);
3714 boolean_t issnap = (strchr(dsname, '@') != NULL);
3715 zfs_prop_t prop = zfs_name_to_prop(propname);
3716 uint64_t intval;
3717 int err;
3718
3719 if (prop == ZPROP_INVAL) {
3720 if (zfs_prop_user(propname)) {
3721 if (err = zfs_secpolicy_write_perms(dsname,
3722 ZFS_DELEG_PERM_USERPROP, cr))
3723 return (err);
3724 return (0);
3725 }
3726
3727 if (!issnap && zfs_prop_userquota(propname)) {
3728 const char *perm = NULL;
3729 const char *uq_prefix =
3730 zfs_userquota_prop_prefixes[ZFS_PROP_USERQUOTA];
3731 const char *gq_prefix =
3732 zfs_userquota_prop_prefixes[ZFS_PROP_GROUPQUOTA];
3733
3734 if (strncmp(propname, uq_prefix,
3735 strlen(uq_prefix)) == 0) {
3736 perm = ZFS_DELEG_PERM_USERQUOTA;
3737 } else if (strncmp(propname, gq_prefix,
3738 strlen(gq_prefix)) == 0) {
3739 perm = ZFS_DELEG_PERM_GROUPQUOTA;
3740 } else {
3741 /* USERUSED and GROUPUSED are read-only */
3742 return (SET_ERROR(EINVAL));
3743 }
3744
3745 if (err = zfs_secpolicy_write_perms(dsname, perm, cr))
3746 return (err);
3747 return (0);
3748 }
3749
3750 return (SET_ERROR(EINVAL));
3751 }
3752
3753 if (issnap)
3754 return (SET_ERROR(EINVAL));
3755
3756 if (nvpair_type(pair) == DATA_TYPE_NVLIST) {
3757 /*
3758 * dsl_prop_get_all_impl() returns properties in this
3759 * format.
3760 */
3761 nvlist_t *attrs;
3762 VERIFY(nvpair_value_nvlist(pair, &attrs) == 0);
3763 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
3764 &pair) == 0);
3765 }
3766
3767 /*
3768 * Check that this value is valid for this pool version
3769 */
3770 switch (prop) {
3771 case ZFS_PROP_COMPRESSION:
3772 /*
3773 * If the user specified gzip compression, make sure
3774 * the SPA supports it. We ignore any errors here since
3775 * we'll catch them later.
3776 */
3777 if (nvpair_value_uint64(pair, &intval) == 0) {
3778 if (intval >= ZIO_COMPRESS_GZIP_1 &&
3779 intval <= ZIO_COMPRESS_GZIP_9 &&
3780 zfs_earlier_version(dsname,
3781 SPA_VERSION_GZIP_COMPRESSION)) {
3782 return (SET_ERROR(ENOTSUP));
3783 }
3784
3785 if (intval == ZIO_COMPRESS_ZLE &&
3786 zfs_earlier_version(dsname,
3787 SPA_VERSION_ZLE_COMPRESSION))
3788 return (SET_ERROR(ENOTSUP));
3789
3790 if (intval == ZIO_COMPRESS_LZ4) {
3791 spa_t *spa;
3792
3793 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3794 return (err);
3795
3796 if (!spa_feature_is_enabled(spa,
3797 SPA_FEATURE_LZ4_COMPRESS)) {
3798 spa_close(spa, FTAG);
3799 return (SET_ERROR(ENOTSUP));
3800 }
3801 spa_close(spa, FTAG);
3802 }
3803
3804 /*
3805 * If this is a bootable dataset then
3806 * verify that the compression algorithm
3807 * is supported for booting. We must return
3808 * something other than ENOTSUP since it
3809 * implies a downrev pool version.
3810 */
3811 if (zfs_is_bootfs(dsname) &&
3812 !BOOTFS_COMPRESS_VALID(intval)) {
3813 return (SET_ERROR(ERANGE));
3814 }
3815 }
3816 break;
3817
3818 case ZFS_PROP_COPIES:
3819 if (zfs_earlier_version(dsname, SPA_VERSION_DITTO_BLOCKS))
3820 return (SET_ERROR(ENOTSUP));
3821 break;
3822
3823 case ZFS_PROP_RECORDSIZE:
3824 /* Record sizes above 128k need the feature to be enabled */
3825 if (nvpair_value_uint64(pair, &intval) == 0 &&
3826 intval > SPA_OLD_MAXBLOCKSIZE) {
3827 spa_t *spa;
3828
3829 /*
3830 * If this is a bootable dataset then
3831 * the we don't allow large (>128K) blocks,
3832 * because GRUB doesn't support them.
3833 */
3834 if (zfs_is_bootfs(dsname) &&
3835 intval > SPA_OLD_MAXBLOCKSIZE) {
3836 return (SET_ERROR(ERANGE));
3837 }
3838
3839 /*
3840 * We don't allow setting the property above 1MB,
3841 * unless the tunable has been changed.
3842 */
3843 if (intval > zfs_max_recordsize ||
3844 intval > SPA_MAXBLOCKSIZE)
3845 return (SET_ERROR(ERANGE));
3846
3847 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3848 return (err);
3849
3850 if (!spa_feature_is_enabled(spa,
3851 SPA_FEATURE_LARGE_BLOCKS)) {
3852 spa_close(spa, FTAG);
3853 return (SET_ERROR(ENOTSUP));
3854 }
3855 spa_close(spa, FTAG);
3856 }
3857 break;
3858
3859 case ZFS_PROP_SHARESMB:
3860 if (zpl_earlier_version(dsname, ZPL_VERSION_FUID))
3861 return (SET_ERROR(ENOTSUP));
3862 break;
3863
3864 case ZFS_PROP_ACLINHERIT:
3865 if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
3866 nvpair_value_uint64(pair, &intval) == 0) {
3867 if (intval == ZFS_ACL_PASSTHROUGH_X &&
3868 zfs_earlier_version(dsname,
3869 SPA_VERSION_PASSTHROUGH_X))
3870 return (SET_ERROR(ENOTSUP));
3871 }
3872 break;
3873
3874 case ZFS_PROP_CHECKSUM:
3875 case ZFS_PROP_DEDUP:
3876 {
3877 spa_feature_t feature;
3878 spa_t *spa;
3879
3880 /* dedup feature version checks */
3881 if (prop == ZFS_PROP_DEDUP &&
3882 zfs_earlier_version(dsname, SPA_VERSION_DEDUP))
3883 return (SET_ERROR(ENOTSUP));
3884
3885 if (nvpair_value_uint64(pair, &intval) != 0)
3886 return (SET_ERROR(EINVAL));
3887
3888 /* check prop value is enabled in features */
3889 feature = zio_checksum_to_feature(intval & ZIO_CHECKSUM_MASK);
3890 if (feature == SPA_FEATURE_NONE)
3891 break;
3892
3893 if ((err = spa_open(dsname, &spa, FTAG)) != 0)
3894 return (err);
3895 /*
3896 * Salted checksums are not supported on root pools.
3897 */
3898 if (spa_bootfs(spa) != 0 &&
3899 intval < ZIO_CHECKSUM_FUNCTIONS &&
3900 (zio_checksum_table[intval].ci_flags &
3901 ZCHECKSUM_FLAG_SALTED)) {
3902 spa_close(spa, FTAG);
3903 return (SET_ERROR(ERANGE));
3904 }
3905 if (!spa_feature_is_enabled(spa, feature)) {
3906 spa_close(spa, FTAG);
3907 return (SET_ERROR(ENOTSUP));
3908 }
3909 spa_close(spa, FTAG);
3910 break;
3911 }
3912 }
3913
3914 return (zfs_secpolicy_setprop(dsname, prop, pair, CRED()));
3915 }
3916
3917 /*
3918 * Checks for a race condition to make sure we don't increment a feature flag
3919 * multiple times.
3920 */
3921 static int
3922 zfs_prop_activate_feature_check(void *arg, dmu_tx_t *tx)
3923 {
3924 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3925 spa_feature_t *featurep = arg;
3926
3927 if (!spa_feature_is_active(spa, *featurep))
3928 return (0);
3929 else
3930 return (SET_ERROR(EBUSY));
3931 }
3932
3933 /*
3934 * The callback invoked on feature activation in the sync task caused by
3935 * zfs_prop_activate_feature.
3936 */
3937 static void
3938 zfs_prop_activate_feature_sync(void *arg, dmu_tx_t *tx)
3939 {
3940 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
3941 spa_feature_t *featurep = arg;
3942
3943 spa_feature_incr(spa, *featurep, tx);
3944 }
3945
3946 /*
3947 * Activates a feature on a pool in response to a property setting. This
3948 * creates a new sync task which modifies the pool to reflect the feature
3949 * as being active.
3950 */
3951 static int
3952 zfs_prop_activate_feature(spa_t *spa, spa_feature_t feature)
3953 {
3954 int err;
3955
3956 /* EBUSY here indicates that the feature is already active */
3957 err = dsl_sync_task(spa_name(spa),
3958 zfs_prop_activate_feature_check, zfs_prop_activate_feature_sync,
3959 &feature, 2, ZFS_SPACE_CHECK_RESERVED);
3960
3961 if (err != 0 && err != EBUSY)
3962 return (err);
3963 else
3964 return (0);
3965 }
3966
3967 /*
3968 * Removes properties from the given props list that fail permission checks
3969 * needed to clear them and to restore them in case of a receive error. For each
3970 * property, make sure we have both set and inherit permissions.
3971 *
3972 * Returns the first error encountered if any permission checks fail. If the
3973 * caller provides a non-NULL errlist, it also gives the complete list of names
3974 * of all the properties that failed a permission check along with the
3975 * corresponding error numbers. The caller is responsible for freeing the
3976 * returned errlist.
3977 *
3978 * If every property checks out successfully, zero is returned and the list
3979 * pointed at by errlist is NULL.
3980 */
3981 static int
3982 zfs_check_clearable(char *dataset, nvlist_t *props, nvlist_t **errlist)
3983 {
3984 zfs_cmd_t *zc;
3985 nvpair_t *pair, *next_pair;
3986 nvlist_t *errors;
3987 int err, rv = 0;
3988
3989 if (props == NULL)
3990 return (0);
3991
3992 VERIFY(nvlist_alloc(&errors, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3993
3994 zc = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
3995 (void) strcpy(zc->zc_name, dataset);
3996 pair = nvlist_next_nvpair(props, NULL);
3997 while (pair != NULL) {
3998 next_pair = nvlist_next_nvpair(props, pair);
3999
4000 (void) strcpy(zc->zc_value, nvpair_name(pair));
4001 if ((err = zfs_check_settable(dataset, pair, CRED())) != 0 ||
4002 (err = zfs_secpolicy_inherit_prop(zc, NULL, CRED())) != 0) {
4003 VERIFY(nvlist_remove_nvpair(props, pair) == 0);
4004 VERIFY(nvlist_add_int32(errors,
4005 zc->zc_value, err) == 0);
4006 }
4007 pair = next_pair;
4008 }
4009 kmem_free(zc, sizeof (zfs_cmd_t));
4010
4011 if ((pair = nvlist_next_nvpair(errors, NULL)) == NULL) {
4012 nvlist_free(errors);
4013 errors = NULL;
4014 } else {
4015 VERIFY(nvpair_value_int32(pair, &rv) == 0);
4016 }
4017
4018 if (errlist == NULL)
4019 nvlist_free(errors);
4020 else
4021 *errlist = errors;
4022
4023 return (rv);
4024 }
4025
4026 static boolean_t
4027 propval_equals(nvpair_t *p1, nvpair_t *p2)
4028 {
4029 if (nvpair_type(p1) == DATA_TYPE_NVLIST) {
4030 /* dsl_prop_get_all_impl() format */
4031 nvlist_t *attrs;
4032 VERIFY(nvpair_value_nvlist(p1, &attrs) == 0);
4033 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
4034 &p1) == 0);
4035 }
4036
4037 if (nvpair_type(p2) == DATA_TYPE_NVLIST) {
4038 nvlist_t *attrs;
4039 VERIFY(nvpair_value_nvlist(p2, &attrs) == 0);
4040 VERIFY(nvlist_lookup_nvpair(attrs, ZPROP_VALUE,
4041 &p2) == 0);
4042 }
4043
4044 if (nvpair_type(p1) != nvpair_type(p2))
4045 return (B_FALSE);
4046
4047 if (nvpair_type(p1) == DATA_TYPE_STRING) {
4048 char *valstr1, *valstr2;
4049
4050 VERIFY(nvpair_value_string(p1, (char **)&valstr1) == 0);
4051 VERIFY(nvpair_value_string(p2, (char **)&valstr2) == 0);
4052 return (strcmp(valstr1, valstr2) == 0);
4053 } else {
4054 uint64_t intval1, intval2;
4055
4056 VERIFY(nvpair_value_uint64(p1, &intval1) == 0);
4057 VERIFY(nvpair_value_uint64(p2, &intval2) == 0);
4058 return (intval1 == intval2);
4059 }
4060 }
4061
4062 /*
4063 * Remove properties from props if they are not going to change (as determined
4064 * by comparison with origprops). Remove them from origprops as well, since we
4065 * do not need to clear or restore properties that won't change.
4066 */
4067 static void
4068 props_reduce(nvlist_t *props, nvlist_t *origprops)
4069 {
4070 nvpair_t *pair, *next_pair;
4071
4072 if (origprops == NULL)
4073 return; /* all props need to be received */
4074
4075 pair = nvlist_next_nvpair(props, NULL);
4076 while (pair != NULL) {
4077 const char *propname = nvpair_name(pair);
4078 nvpair_t *match;
4079
4080 next_pair = nvlist_next_nvpair(props, pair);
4081
4082 if ((nvlist_lookup_nvpair(origprops, propname,
4083 &match) != 0) || !propval_equals(pair, match))
4084 goto next; /* need to set received value */
4085
4086 /* don't clear the existing received value */
4087 (void) nvlist_remove_nvpair(origprops, match);
4088 /* don't bother receiving the property */
4089 (void) nvlist_remove_nvpair(props, pair);
4090 next:
4091 pair = next_pair;
4092 }
4093 }
4094
4095 /*
4096 * Extract properties that cannot be set PRIOR to the receipt of a dataset.
4097 * For example, refquota cannot be set until after the receipt of a dataset,
4098 * because in replication streams, an older/earlier snapshot may exceed the
4099 * refquota. We want to receive the older/earlier snapshot, but setting
4100 * refquota pre-receipt will set the dsl's ACTUAL quota, which will prevent
4101 * the older/earlier snapshot from being received (with EDQUOT).
4102 *
4103 * The ZFS test "zfs_receive_011_pos" demonstrates such a scenario.
4104 *
4105 * libzfs will need to be judicious handling errors encountered by props
4106 * extracted by this function.
4107 */
4108 static nvlist_t *
4109 extract_delay_props(nvlist_t *props)
4110 {
4111 nvlist_t *delayprops;
4112 nvpair_t *nvp, *tmp;
4113 static const zfs_prop_t delayable[] = { ZFS_PROP_REFQUOTA, 0 };
4114 int i;
4115
4116 VERIFY(nvlist_alloc(&delayprops, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4117
4118 for (nvp = nvlist_next_nvpair(props, NULL); nvp != NULL;
4119 nvp = nvlist_next_nvpair(props, nvp)) {
4120 /*
4121 * strcmp() is safe because zfs_prop_to_name() always returns
4122 * a bounded string.
4123 */
4124 for (i = 0; delayable[i] != 0; i++) {
4125 if (strcmp(zfs_prop_to_name(delayable[i]),
4126 nvpair_name(nvp)) == 0) {
4127 break;
4128 }
4129 }
4130 if (delayable[i] != 0) {
4131 tmp = nvlist_prev_nvpair(props, nvp);
4132 VERIFY(nvlist_add_nvpair(delayprops, nvp) == 0);
4133 VERIFY(nvlist_remove_nvpair(props, nvp) == 0);
4134 nvp = tmp;
4135 }
4136 }
4137
4138 if (nvlist_empty(delayprops)) {
4139 nvlist_free(delayprops);
4140 delayprops = NULL;
4141 }
4142 return (delayprops);
4143 }
4144
4145 #ifdef DEBUG
4146 static boolean_t zfs_ioc_recv_inject_err;
4147 #endif
4148
4149 /*
4150 * inputs:
4151 * zc_name name of containing filesystem
4152 * zc_nvlist_src{_size} nvlist of properties to apply
4153 * zc_value name of snapshot to create
4154 * zc_string name of clone origin (if DRR_FLAG_CLONE)
4155 * zc_cookie file descriptor to recv from
4156 * zc_begin_record the BEGIN record of the stream (not byteswapped)
4157 * zc_guid force flag
4158 * zc_cleanup_fd cleanup-on-exit file descriptor
4159 * zc_action_handle handle for this guid/ds mapping (or zero on first call)
4160 * zc_resumable if data is incomplete assume sender will resume
4161 *
4162 * outputs:
4163 * zc_cookie number of bytes read
4164 * zc_nvlist_dst{_size} error for each unapplied received property
4165 * zc_obj zprop_errflags_t
4166 * zc_action_handle handle for this guid/ds mapping
4167 */
4168 static int
4169 zfs_ioc_recv(zfs_cmd_t *zc)
4170 {
4171 file_t *fp;
4172 dmu_recv_cookie_t drc;
4173 boolean_t force = (boolean_t)zc->zc_guid;
4174 int fd;
4175 int error = 0;
4176 int props_error = 0;
4177 nvlist_t *errors;
4178 offset_t off;
4179 nvlist_t *props = NULL; /* sent properties */
4180 nvlist_t *origprops = NULL; /* existing properties */
4181 nvlist_t *delayprops = NULL; /* sent properties applied post-receive */
4182 char *origin = NULL;
4183 char *tosnap;
4184 char tofs[ZFS_MAXNAMELEN];
4185 boolean_t first_recvd_props = B_FALSE;
4186
4187 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
4188 strchr(zc->zc_value, '@') == NULL ||
4189 strchr(zc->zc_value, '%'))
4190 return (SET_ERROR(EINVAL));
4191
4192 (void) strcpy(tofs, zc->zc_value);
4193 tosnap = strchr(tofs, '@');
4194 *tosnap++ = '\0';
4195
4196 if (zc->zc_nvlist_src != NULL &&
4197 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
4198 zc->zc_iflags, &props)) != 0)
4199 return (error);
4200
4201 fd = zc->zc_cookie;
4202 fp = getf(fd);
4203 if (fp == NULL) {
4204 nvlist_free(props);
4205 return (SET_ERROR(EBADF));
4206 }
4207
4208 errors = fnvlist_alloc();
4209
4210 if (zc->zc_string[0])
4211 origin = zc->zc_string;
4212
4213 error = dmu_recv_begin(tofs, tosnap,
4214 &zc->zc_begin_record, force, zc->zc_resumable, origin, &drc);
4215 if (error != 0)
4216 goto out;
4217
4218 /*
4219 * Set properties before we receive the stream so that they are applied
4220 * to the new data. Note that we must call dmu_recv_stream() if
4221 * dmu_recv_begin() succeeds.
4222 */
4223 if (props != NULL && !drc.drc_newfs) {
4224 if (spa_version(dsl_dataset_get_spa(drc.drc_ds)) >=
4225 SPA_VERSION_RECVD_PROPS &&
4226 !dsl_prop_get_hasrecvd(tofs))
4227 first_recvd_props = B_TRUE;
4228
4229 /*
4230 * If new received properties are supplied, they are to
4231 * completely replace the existing received properties, so stash
4232 * away the existing ones.
4233 */
4234 if (dsl_prop_get_received(tofs, &origprops) == 0) {
4235 nvlist_t *errlist = NULL;
4236 /*
4237 * Don't bother writing a property if its value won't
4238 * change (and avoid the unnecessary security checks).
4239 *
4240 * The first receive after SPA_VERSION_RECVD_PROPS is a
4241 * special case where we blow away all local properties
4242 * regardless.
4243 */
4244 if (!first_recvd_props)
4245 props_reduce(props, origprops);
4246 if (zfs_check_clearable(tofs, origprops, &errlist) != 0)
4247 (void) nvlist_merge(errors, errlist, 0);
4248 nvlist_free(errlist);
4249
4250 if (clear_received_props(tofs, origprops,
4251 first_recvd_props ? NULL : props) != 0)
4252 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4253 } else {
4254 zc->zc_obj |= ZPROP_ERR_NOCLEAR;
4255 }
4256 }
4257
4258 if (props != NULL) {
4259 props_error = dsl_prop_set_hasrecvd(tofs);
4260
4261 if (props_error == 0) {
4262 delayprops = extract_delay_props(props);
4263 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4264 props, errors);
4265 }
4266 }
4267
4268 off = fp->f_offset;
4269 error = dmu_recv_stream(&drc, fp->f_vnode, &off, zc->zc_cleanup_fd,
4270 &zc->zc_action_handle);
4271
4272 if (error == 0) {
4273 zfsvfs_t *zfsvfs = NULL;
4274
4275 if (getzfsvfs(tofs, &zfsvfs) == 0) {
4276 /* online recv */
4277 int end_err;
4278
4279 error = zfs_suspend_fs(zfsvfs);
4280 /*
4281 * If the suspend fails, then the recv_end will
4282 * likely also fail, and clean up after itself.
4283 */
4284 end_err = dmu_recv_end(&drc, zfsvfs);
4285 if (error == 0)
4286 error = zfs_resume_fs(zfsvfs, tofs);
4287 error = error ? error : end_err;
4288 VFS_RELE(zfsvfs->z_vfs);
4289 } else {
4290 error = dmu_recv_end(&drc, NULL);
4291 }
4292
4293 /* Set delayed properties now, after we're done receiving. */
4294 if (delayprops != NULL && error == 0) {
4295 (void) zfs_set_prop_nvlist(tofs, ZPROP_SRC_RECEIVED,
4296 delayprops, errors);
4297 }
4298 }
4299
4300 if (delayprops != NULL) {
4301 /*
4302 * Merge delayed props back in with initial props, in case
4303 * we're DEBUG and zfs_ioc_recv_inject_err is set (which means
4304 * we have to make sure clear_received_props() includes
4305 * the delayed properties).
4306 *
4307 * Since zfs_ioc_recv_inject_err is only in DEBUG kernels,
4308 * using ASSERT() will be just like a VERIFY.
4309 */
4310 ASSERT(nvlist_merge(props, delayprops, 0) == 0);
4311 nvlist_free(delayprops);
4312 }
4313
4314 /*
4315 * Now that all props, initial and delayed, are set, report the prop
4316 * errors to the caller.
4317 */
4318 if (zc->zc_nvlist_dst_size != 0 &&
4319 (nvlist_smush(errors, zc->zc_nvlist_dst_size) != 0 ||
4320 put_nvlist(zc, errors) != 0)) {
4321 /*
4322 * Caller made zc->zc_nvlist_dst less than the minimum expected
4323 * size or supplied an invalid address.
4324 */
4325 props_error = SET_ERROR(EINVAL);
4326 }
4327
4328 zc->zc_cookie = off - fp->f_offset;
4329 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4330 fp->f_offset = off;
4331
4332 #ifdef DEBUG
4333 if (zfs_ioc_recv_inject_err) {
4334 zfs_ioc_recv_inject_err = B_FALSE;
4335 error = 1;
4336 }
4337 #endif
4338 /*
4339 * On error, restore the original props.
4340 */
4341 if (error != 0 && props != NULL && !drc.drc_newfs) {
4342 if (clear_received_props(tofs, props, NULL) != 0) {
4343 /*
4344 * We failed to clear the received properties.
4345 * Since we may have left a $recvd value on the
4346 * system, we can't clear the $hasrecvd flag.
4347 */
4348 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4349 } else if (first_recvd_props) {
4350 dsl_prop_unset_hasrecvd(tofs);
4351 }
4352
4353 if (origprops == NULL && !drc.drc_newfs) {
4354 /* We failed to stash the original properties. */
4355 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4356 }
4357
4358 /*
4359 * dsl_props_set() will not convert RECEIVED to LOCAL on or
4360 * after SPA_VERSION_RECVD_PROPS, so we need to specify LOCAL
4361 * explictly if we're restoring local properties cleared in the
4362 * first new-style receive.
4363 */
4364 if (origprops != NULL &&
4365 zfs_set_prop_nvlist(tofs, (first_recvd_props ?
4366 ZPROP_SRC_LOCAL : ZPROP_SRC_RECEIVED),
4367 origprops, NULL) != 0) {
4368 /*
4369 * We stashed the original properties but failed to
4370 * restore them.
4371 */
4372 zc->zc_obj |= ZPROP_ERR_NORESTORE;
4373 }
4374 }
4375 out:
4376 nvlist_free(props);
4377 nvlist_free(origprops);
4378 nvlist_free(errors);
4379 releasef(fd);
4380
4381 if (error == 0)
4382 error = props_error;
4383
4384 return (error);
4385 }
4386
4387 /*
4388 * inputs:
4389 * zc_name name of snapshot to send
4390 * zc_cookie file descriptor to send stream to
4391 * zc_obj fromorigin flag (mutually exclusive with zc_fromobj)
4392 * zc_sendobj objsetid of snapshot to send
4393 * zc_fromobj objsetid of incremental fromsnap (may be zero)
4394 * zc_guid if set, estimate size of stream only. zc_cookie is ignored.
4395 * output size in zc_objset_type.
4396 * zc_flags lzc_send_flags
4397 *
4398 * outputs:
4399 * zc_objset_type estimated size, if zc_guid is set
4400 */
4401 static int
4402 zfs_ioc_send(zfs_cmd_t *zc)
4403 {
4404 int error;
4405 offset_t off;
4406 boolean_t estimate = (zc->zc_guid != 0);
4407 boolean_t embedok = (zc->zc_flags & 0x1);
4408 boolean_t large_block_ok = (zc->zc_flags & 0x2);
4409
4410 if (zc->zc_obj != 0) {
4411 dsl_pool_t *dp;
4412 dsl_dataset_t *tosnap;
4413
4414 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4415 if (error != 0)
4416 return (error);
4417
4418 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4419 if (error != 0) {
4420 dsl_pool_rele(dp, FTAG);
4421 return (error);
4422 }
4423
4424 if (dsl_dir_is_clone(tosnap->ds_dir))
4425 zc->zc_fromobj =
4426 dsl_dir_phys(tosnap->ds_dir)->dd_origin_obj;
4427 dsl_dataset_rele(tosnap, FTAG);
4428 dsl_pool_rele(dp, FTAG);
4429 }
4430
4431 if (estimate) {
4432 dsl_pool_t *dp;
4433 dsl_dataset_t *tosnap;
4434 dsl_dataset_t *fromsnap = NULL;
4435
4436 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4437 if (error != 0)
4438 return (error);
4439
4440 error = dsl_dataset_hold_obj(dp, zc->zc_sendobj, FTAG, &tosnap);
4441 if (error != 0) {
4442 dsl_pool_rele(dp, FTAG);
4443 return (error);
4444 }
4445
4446 if (zc->zc_fromobj != 0) {
4447 error = dsl_dataset_hold_obj(dp, zc->zc_fromobj,
4448 FTAG, &fromsnap);
4449 if (error != 0) {
4450 dsl_dataset_rele(tosnap, FTAG);
4451 dsl_pool_rele(dp, FTAG);
4452 return (error);
4453 }
4454 }
4455
4456 error = dmu_send_estimate(tosnap, fromsnap,
4457 &zc->zc_objset_type);
4458
4459 if (fromsnap != NULL)
4460 dsl_dataset_rele(fromsnap, FTAG);
4461 dsl_dataset_rele(tosnap, FTAG);
4462 dsl_pool_rele(dp, FTAG);
4463 } else {
4464 file_t *fp = getf(zc->zc_cookie);
4465 if (fp == NULL)
4466 return (SET_ERROR(EBADF));
4467
4468 off = fp->f_offset;
4469 error = dmu_send_obj(zc->zc_name, zc->zc_sendobj,
4470 zc->zc_fromobj, embedok, large_block_ok,
4471 zc->zc_cookie, fp->f_vnode, &off);
4472
4473 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
4474 fp->f_offset = off;
4475 releasef(zc->zc_cookie);
4476 }
4477 return (error);
4478 }
4479
4480 /*
4481 * inputs:
4482 * zc_name name of snapshot on which to report progress
4483 * zc_cookie file descriptor of send stream
4484 *
4485 * outputs:
4486 * zc_cookie number of bytes written in send stream thus far
4487 */
4488 static int
4489 zfs_ioc_send_progress(zfs_cmd_t *zc)
4490 {
4491 dsl_pool_t *dp;
4492 dsl_dataset_t *ds;
4493 dmu_sendarg_t *dsp = NULL;
4494 int error;
4495
4496 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
4497 if (error != 0)
4498 return (error);
4499
4500 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &ds);
4501 if (error != 0) {
4502 dsl_pool_rele(dp, FTAG);
4503 return (error);
4504 }
4505
4506 mutex_enter(&ds->ds_sendstream_lock);
4507
4508 /*
4509 * Iterate over all the send streams currently active on this dataset.
4510 * If there's one which matches the specified file descriptor _and_ the
4511 * stream was started by the current process, return the progress of
4512 * that stream.
4513 */
4514 for (dsp = list_head(&ds->ds_sendstreams); dsp != NULL;
4515 dsp = list_next(&ds->ds_sendstreams, dsp)) {
4516 if (dsp->dsa_outfd == zc->zc_cookie &&
4517 dsp->dsa_proc == curproc)
4518 break;
4519 }
4520
4521 if (dsp != NULL)
4522 zc->zc_cookie = *(dsp->dsa_off);
4523 else
4524 error = SET_ERROR(ENOENT);
4525
4526 mutex_exit(&ds->ds_sendstream_lock);
4527 dsl_dataset_rele(ds, FTAG);
4528 dsl_pool_rele(dp, FTAG);
4529 return (error);
4530 }
4531
4532 static int
4533 zfs_ioc_inject_fault(zfs_cmd_t *zc)
4534 {
4535 int id, error;
4536
4537 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
4538 &zc->zc_inject_record);
4539
4540 if (error == 0)
4541 zc->zc_guid = (uint64_t)id;
4542
4543 return (error);
4544 }
4545
4546 static int
4547 zfs_ioc_clear_fault(zfs_cmd_t *zc)
4548 {
4549 return (zio_clear_fault((int)zc->zc_guid));
4550 }
4551
4552 static int
4553 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
4554 {
4555 int id = (int)zc->zc_guid;
4556 int error;
4557
4558 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
4559 &zc->zc_inject_record);
4560
4561 zc->zc_guid = id;
4562
4563 return (error);
4564 }
4565
4566 static int
4567 zfs_ioc_error_log(zfs_cmd_t *zc)
4568 {
4569 spa_t *spa;
4570 int error;
4571 size_t count = (size_t)zc->zc_nvlist_dst_size;
4572
4573 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
4574 return (error);
4575
4576 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
4577 &count);
4578 if (error == 0)
4579 zc->zc_nvlist_dst_size = count;
4580 else
4581 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
4582
4583 spa_close(spa, FTAG);
4584
4585 return (error);
4586 }
4587
4588 static int
4589 zfs_ioc_clear(zfs_cmd_t *zc)
4590 {
4591 spa_t *spa;
4592 vdev_t *vd;
4593 int error;
4594
4595 /*
4596 * On zpool clear we also fix up missing slogs
4597 */
4598 mutex_enter(&spa_namespace_lock);
4599 spa = spa_lookup(zc->zc_name);
4600 if (spa == NULL) {
4601 mutex_exit(&spa_namespace_lock);
4602 return (SET_ERROR(EIO));
4603 }
4604 if (spa_get_log_state(spa) == SPA_LOG_MISSING) {
4605 /* we need to let spa_open/spa_load clear the chains */
4606 spa_set_log_state(spa, SPA_LOG_CLEAR);
4607 }
4608 spa->spa_last_open_failed = 0;
4609 mutex_exit(&spa_namespace_lock);
4610
4611 if (zc->zc_cookie & ZPOOL_NO_REWIND) {
4612 error = spa_open(zc->zc_name, &spa, FTAG);
4613 } else {
4614 nvlist_t *policy;
4615 nvlist_t *config = NULL;
4616
4617 if (zc->zc_nvlist_src == NULL)
4618 return (SET_ERROR(EINVAL));
4619
4620 if ((error = get_nvlist(zc->zc_nvlist_src,
4621 zc->zc_nvlist_src_size, zc->zc_iflags, &policy)) == 0) {
4622 error = spa_open_rewind(zc->zc_name, &spa, FTAG,
4623 policy, &config);
4624 if (config != NULL) {
4625 int err;
4626
4627 if ((err = put_nvlist(zc, config)) != 0)
4628 error = err;
4629 nvlist_free(config);
4630 }
4631 nvlist_free(policy);
4632 }
4633 }
4634
4635 if (error != 0)
4636 return (error);
4637
4638 spa_vdev_state_enter(spa, SCL_NONE);
4639
4640 if (zc->zc_guid == 0) {
4641 vd = NULL;
4642 } else {
4643 vd = spa_lookup_by_guid(spa, zc->zc_guid, B_TRUE);
4644 if (vd == NULL) {
4645 (void) spa_vdev_state_exit(spa, NULL, ENODEV);
4646 spa_close(spa, FTAG);
4647 return (SET_ERROR(ENODEV));
4648 }
4649 }
4650
4651 vdev_clear(spa, vd);
4652
4653 (void) spa_vdev_state_exit(spa, NULL, 0);
4654
4655 /*
4656 * Resume any suspended I/Os.
4657 */
4658 if (zio_resume(spa) != 0)
4659 error = SET_ERROR(EIO);
4660
4661 spa_close(spa, FTAG);
4662
4663 return (error);
4664 }
4665
4666 static int
4667 zfs_ioc_pool_reopen(zfs_cmd_t *zc)
4668 {
4669 spa_t *spa;
4670 int error;
4671
4672 error = spa_open(zc->zc_name, &spa, FTAG);
4673 if (error != 0)
4674 return (error);
4675
4676 spa_vdev_state_enter(spa, SCL_NONE);
4677
4678 /*
4679 * If a resilver is already in progress then set the
4680 * spa_scrub_reopen flag to B_TRUE so that we don't restart
4681 * the scan as a side effect of the reopen. Otherwise, let
4682 * vdev_open() decided if a resilver is required.
4683 */
4684 spa->spa_scrub_reopen = dsl_scan_resilvering(spa->spa_dsl_pool);
4685 vdev_reopen(spa->spa_root_vdev);
4686 spa->spa_scrub_reopen = B_FALSE;
4687
4688 (void) spa_vdev_state_exit(spa, NULL, 0);
4689 spa_close(spa, FTAG);
4690 return (0);
4691 }
4692 /*
4693 * inputs:
4694 * zc_name name of filesystem
4695 * zc_value name of origin snapshot
4696 *
4697 * outputs:
4698 * zc_string name of conflicting snapshot, if there is one
4699 */
4700 static int
4701 zfs_ioc_promote(zfs_cmd_t *zc)
4702 {
4703 char *cp;
4704
4705 /*
4706 * We don't need to unmount *all* the origin fs's snapshots, but
4707 * it's easier.
4708 */
4709 cp = strchr(zc->zc_value, '@');
4710 if (cp)
4711 *cp = '\0';
4712 (void) dmu_objset_find(zc->zc_value,
4713 zfs_unmount_snap_cb, NULL, DS_FIND_SNAPSHOTS);
4714 return (dsl_dataset_promote(zc->zc_name, zc->zc_string));
4715 }
4716
4717 /*
4718 * Retrieve a single {user|group}{used|quota}@... property.
4719 *
4720 * inputs:
4721 * zc_name name of filesystem
4722 * zc_objset_type zfs_userquota_prop_t
4723 * zc_value domain name (eg. "S-1-234-567-89")
4724 * zc_guid RID/UID/GID
4725 *
4726 * outputs:
4727 * zc_cookie property value
4728 */
4729 static int
4730 zfs_ioc_userspace_one(zfs_cmd_t *zc)
4731 {
4732 zfsvfs_t *zfsvfs;
4733 int error;
4734
4735 if (zc->zc_objset_type >= ZFS_NUM_USERQUOTA_PROPS)
4736 return (SET_ERROR(EINVAL));
4737
4738 error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4739 if (error != 0)
4740 return (error);
4741
4742 error = zfs_userspace_one(zfsvfs,
4743 zc->zc_objset_type, zc->zc_value, zc->zc_guid, &zc->zc_cookie);
4744 zfsvfs_rele(zfsvfs, FTAG);
4745
4746 return (error);
4747 }
4748
4749 /*
4750 * inputs:
4751 * zc_name name of filesystem
4752 * zc_cookie zap cursor
4753 * zc_objset_type zfs_userquota_prop_t
4754 * zc_nvlist_dst[_size] buffer to fill (not really an nvlist)
4755 *
4756 * outputs:
4757 * zc_nvlist_dst[_size] data buffer (array of zfs_useracct_t)
4758 * zc_cookie zap cursor
4759 */
4760 static int
4761 zfs_ioc_userspace_many(zfs_cmd_t *zc)
4762 {
4763 zfsvfs_t *zfsvfs;
4764 int bufsize = zc->zc_nvlist_dst_size;
4765
4766 if (bufsize <= 0)
4767 return (SET_ERROR(ENOMEM));
4768
4769 int error = zfsvfs_hold(zc->zc_name, FTAG, &zfsvfs, B_FALSE);
4770 if (error != 0)
4771 return (error);
4772
4773 void *buf = kmem_alloc(bufsize, KM_SLEEP);
4774
4775 error = zfs_userspace_many(zfsvfs, zc->zc_objset_type, &zc->zc_cookie,
4776 buf, &zc->zc_nvlist_dst_size);
4777
4778 if (error == 0) {
4779 error = xcopyout(buf,
4780 (void *)(uintptr_t)zc->zc_nvlist_dst,
4781 zc->zc_nvlist_dst_size);
4782 }
4783 kmem_free(buf, bufsize);
4784 zfsvfs_rele(zfsvfs, FTAG);
4785
4786 return (error);
4787 }
4788
4789 /*
4790 * inputs:
4791 * zc_name name of filesystem
4792 *
4793 * outputs:
4794 * none
4795 */
4796 static int
4797 zfs_ioc_userspace_upgrade(zfs_cmd_t *zc)
4798 {
4799 objset_t *os;
4800 int error = 0;
4801 zfsvfs_t *zfsvfs;
4802
4803 if (getzfsvfs(zc->zc_name, &zfsvfs) == 0) {
4804 if (!dmu_objset_userused_enabled(zfsvfs->z_os)) {
4805 /*
4806 * If userused is not enabled, it may be because the
4807 * objset needs to be closed & reopened (to grow the
4808 * objset_phys_t). Suspend/resume the fs will do that.
4809 */
4810 error = zfs_suspend_fs(zfsvfs);
4811 if (error == 0) {
4812 dmu_objset_refresh_ownership(zfsvfs->z_os,
4813 zfsvfs);
4814 error = zfs_resume_fs(zfsvfs, zc->zc_name);
4815 }
4816 }
4817 if (error == 0)
4818 error = dmu_objset_userspace_upgrade(zfsvfs->z_os);
4819 VFS_RELE(zfsvfs->z_vfs);
4820 } else {
4821 /* XXX kind of reading contents without owning */
4822 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4823 if (error != 0)
4824 return (error);
4825
4826 error = dmu_objset_userspace_upgrade(os);
4827 dmu_objset_rele(os, FTAG);
4828 }
4829
4830 return (error);
4831 }
4832
4833 /*
4834 * We don't want to have a hard dependency
4835 * against some special symbols in sharefs
4836 * nfs, and smbsrv. Determine them if needed when
4837 * the first file system is shared.
4838 * Neither sharefs, nfs or smbsrv are unloadable modules.
4839 */
4840 int (*znfsexport_fs)(void *arg);
4841 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
4842 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
4843
4844 int zfs_nfsshare_inited;
4845 int zfs_smbshare_inited;
4846
4847 ddi_modhandle_t nfs_mod;
4848 ddi_modhandle_t sharefs_mod;
4849 ddi_modhandle_t smbsrv_mod;
4850 kmutex_t zfs_share_lock;
4851
4852 static int
4853 zfs_init_sharefs()
4854 {
4855 int error;
4856
4857 ASSERT(MUTEX_HELD(&zfs_share_lock));
4858 /* Both NFS and SMB shares also require sharetab support. */
4859 if (sharefs_mod == NULL && ((sharefs_mod =
4860 ddi_modopen("fs/sharefs",
4861 KRTLD_MODE_FIRST, &error)) == NULL)) {
4862 return (SET_ERROR(ENOSYS));
4863 }
4864 if (zshare_fs == NULL && ((zshare_fs =
4865 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
4866 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
4867 return (SET_ERROR(ENOSYS));
4868 }
4869 return (0);
4870 }
4871
4872 static int
4873 zfs_ioc_share(zfs_cmd_t *zc)
4874 {
4875 int error;
4876 int opcode;
4877
4878 switch (zc->zc_share.z_sharetype) {
4879 case ZFS_SHARE_NFS:
4880 case ZFS_UNSHARE_NFS:
4881 if (zfs_nfsshare_inited == 0) {
4882 mutex_enter(&zfs_share_lock);
4883 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
4884 KRTLD_MODE_FIRST, &error)) == NULL)) {
4885 mutex_exit(&zfs_share_lock);
4886 return (SET_ERROR(ENOSYS));
4887 }
4888 if (znfsexport_fs == NULL &&
4889 ((znfsexport_fs = (int (*)(void *))
4890 ddi_modsym(nfs_mod,
4891 "nfs_export", &error)) == NULL)) {
4892 mutex_exit(&zfs_share_lock);
4893 return (SET_ERROR(ENOSYS));
4894 }
4895 error = zfs_init_sharefs();
4896 if (error != 0) {
4897 mutex_exit(&zfs_share_lock);
4898 return (SET_ERROR(ENOSYS));
4899 }
4900 zfs_nfsshare_inited = 1;
4901 mutex_exit(&zfs_share_lock);
4902 }
4903 break;
4904 case ZFS_SHARE_SMB:
4905 case ZFS_UNSHARE_SMB:
4906 if (zfs_smbshare_inited == 0) {
4907 mutex_enter(&zfs_share_lock);
4908 if (smbsrv_mod == NULL && ((smbsrv_mod =
4909 ddi_modopen("drv/smbsrv",
4910 KRTLD_MODE_FIRST, &error)) == NULL)) {
4911 mutex_exit(&zfs_share_lock);
4912 return (SET_ERROR(ENOSYS));
4913 }
4914 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
4915 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
4916 "smb_server_share", &error)) == NULL)) {
4917 mutex_exit(&zfs_share_lock);
4918 return (SET_ERROR(ENOSYS));
4919 }
4920 error = zfs_init_sharefs();
4921 if (error != 0) {
4922 mutex_exit(&zfs_share_lock);
4923 return (SET_ERROR(ENOSYS));
4924 }
4925 zfs_smbshare_inited = 1;
4926 mutex_exit(&zfs_share_lock);
4927 }
4928 break;
4929 default:
4930 return (SET_ERROR(EINVAL));
4931 }
4932
4933 switch (zc->zc_share.z_sharetype) {
4934 case ZFS_SHARE_NFS:
4935 case ZFS_UNSHARE_NFS:
4936 if (error =
4937 znfsexport_fs((void *)
4938 (uintptr_t)zc->zc_share.z_exportdata))
4939 return (error);
4940 break;
4941 case ZFS_SHARE_SMB:
4942 case ZFS_UNSHARE_SMB:
4943 if (error = zsmbexport_fs((void *)
4944 (uintptr_t)zc->zc_share.z_exportdata,
4945 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
4946 B_TRUE: B_FALSE)) {
4947 return (error);
4948 }
4949 break;
4950 }
4951
4952 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
4953 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
4954 SHAREFS_ADD : SHAREFS_REMOVE;
4955
4956 /*
4957 * Add or remove share from sharetab
4958 */
4959 error = zshare_fs(opcode,
4960 (void *)(uintptr_t)zc->zc_share.z_sharedata,
4961 zc->zc_share.z_sharemax);
4962
4963 return (error);
4964
4965 }
4966
4967 ace_t full_access[] = {
4968 {(uid_t)-1, ACE_ALL_PERMS, ACE_EVERYONE, 0}
4969 };
4970
4971 /*
4972 * inputs:
4973 * zc_name name of containing filesystem
4974 * zc_obj object # beyond which we want next in-use object #
4975 *
4976 * outputs:
4977 * zc_obj next in-use object #
4978 */
4979 static int
4980 zfs_ioc_next_obj(zfs_cmd_t *zc)
4981 {
4982 objset_t *os = NULL;
4983 int error;
4984
4985 error = dmu_objset_hold(zc->zc_name, FTAG, &os);
4986 if (error != 0)
4987 return (error);
4988
4989 error = dmu_object_next(os, &zc->zc_obj, B_FALSE,
4990 dsl_dataset_phys(os->os_dsl_dataset)->ds_prev_snap_txg);
4991
4992 dmu_objset_rele(os, FTAG);
4993 return (error);
4994 }
4995
4996 /*
4997 * inputs:
4998 * zc_name name of filesystem
4999 * zc_value prefix name for snapshot
5000 * zc_cleanup_fd cleanup-on-exit file descriptor for calling process
5001 *
5002 * outputs:
5003 * zc_value short name of new snapshot
5004 */
5005 static int
5006 zfs_ioc_tmp_snapshot(zfs_cmd_t *zc)
5007 {
5008 char *snap_name;
5009 char *hold_name;
5010 int error;
5011 minor_t minor;
5012
5013 error = zfs_onexit_fd_hold(zc->zc_cleanup_fd, &minor);
5014 if (error != 0)
5015 return (error);
5016
5017 snap_name = kmem_asprintf("%s-%016llx", zc->zc_value,
5018 (u_longlong_t)ddi_get_lbolt64());
5019 hold_name = kmem_asprintf("%%%s", zc->zc_value);
5020
5021 error = dsl_dataset_snapshot_tmp(zc->zc_name, snap_name, minor,
5022 hold_name);
5023 if (error == 0)
5024 (void) strcpy(zc->zc_value, snap_name);
5025 strfree(snap_name);
5026 strfree(hold_name);
5027 zfs_onexit_fd_rele(zc->zc_cleanup_fd);
5028 return (error);
5029 }
5030
5031 /*
5032 * inputs:
5033 * zc_name name of "to" snapshot
5034 * zc_value name of "from" snapshot
5035 * zc_cookie file descriptor to write diff data on
5036 *
5037 * outputs:
5038 * dmu_diff_record_t's to the file descriptor
5039 */
5040 static int
5041 zfs_ioc_diff(zfs_cmd_t *zc)
5042 {
5043 file_t *fp;
5044 offset_t off;
5045 int error;
5046
5047 fp = getf(zc->zc_cookie);
5048 if (fp == NULL)
5049 return (SET_ERROR(EBADF));
5050
5051 off = fp->f_offset;
5052
5053 error = dmu_diff(zc->zc_name, zc->zc_value, fp->f_vnode, &off);
5054
5055 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5056 fp->f_offset = off;
5057 releasef(zc->zc_cookie);
5058
5059 return (error);
5060 }
5061
5062 /*
5063 * Remove all ACL files in shares dir
5064 */
5065 static int
5066 zfs_smb_acl_purge(znode_t *dzp)
5067 {
5068 zap_cursor_t zc;
5069 zap_attribute_t zap;
5070 zfsvfs_t *zfsvfs = dzp->z_zfsvfs;
5071 int error;
5072
5073 for (zap_cursor_init(&zc, zfsvfs->z_os, dzp->z_id);
5074 (error = zap_cursor_retrieve(&zc, &zap)) == 0;
5075 zap_cursor_advance(&zc)) {
5076 if ((error = VOP_REMOVE(ZTOV(dzp), zap.za_name, kcred,
5077 NULL, 0)) != 0)
5078 break;
5079 }
5080 zap_cursor_fini(&zc);
5081 return (error);
5082 }
5083
5084 static int
5085 zfs_ioc_smb_acl(zfs_cmd_t *zc)
5086 {
5087 vnode_t *vp;
5088 znode_t *dzp;
5089 vnode_t *resourcevp = NULL;
5090 znode_t *sharedir;
5091 zfsvfs_t *zfsvfs;
5092 nvlist_t *nvlist;
5093 char *src, *target;
5094 vattr_t vattr;
5095 vsecattr_t vsec;
5096 int error = 0;
5097
5098 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
5099 NO_FOLLOW, NULL, &vp)) != 0)
5100 return (error);
5101
5102 /* Now make sure mntpnt and dataset are ZFS */
5103
5104 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
5105 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
5106 zc->zc_name) != 0)) {
5107 VN_RELE(vp);
5108 return (SET_ERROR(EINVAL));
5109 }
5110
5111 dzp = VTOZ(vp);
5112 zfsvfs = dzp->z_zfsvfs;
5113 ZFS_ENTER(zfsvfs);
5114
5115 /*
5116 * Create share dir if its missing.
5117 */
5118 mutex_enter(&zfsvfs->z_lock);
5119 if (zfsvfs->z_shares_dir == 0) {
5120 dmu_tx_t *tx;
5121
5122 tx = dmu_tx_create(zfsvfs->z_os);
5123 dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, TRUE,
5124 ZFS_SHARES_DIR);
5125 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
5126 error = dmu_tx_assign(tx, TXG_WAIT);
5127 if (error != 0) {
5128 dmu_tx_abort(tx);
5129 } else {
5130 error = zfs_create_share_dir(zfsvfs, tx);
5131 dmu_tx_commit(tx);
5132 }
5133 if (error != 0) {
5134 mutex_exit(&zfsvfs->z_lock);
5135 VN_RELE(vp);
5136 ZFS_EXIT(zfsvfs);
5137 return (error);
5138 }
5139 }
5140 mutex_exit(&zfsvfs->z_lock);
5141
5142 ASSERT(zfsvfs->z_shares_dir);
5143 if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &sharedir)) != 0) {
5144 VN_RELE(vp);
5145 ZFS_EXIT(zfsvfs);
5146 return (error);
5147 }
5148
5149 switch (zc->zc_cookie) {
5150 case ZFS_SMB_ACL_ADD:
5151 vattr.va_mask = AT_MODE|AT_UID|AT_GID|AT_TYPE;
5152 vattr.va_type = VREG;
5153 vattr.va_mode = S_IFREG|0777;
5154 vattr.va_uid = 0;
5155 vattr.va_gid = 0;
5156
5157 vsec.vsa_mask = VSA_ACE;
5158 vsec.vsa_aclentp = &full_access;
5159 vsec.vsa_aclentsz = sizeof (full_access);
5160 vsec.vsa_aclcnt = 1;
5161
5162 error = VOP_CREATE(ZTOV(sharedir), zc->zc_string,
5163 &vattr, EXCL, 0, &resourcevp, kcred, 0, NULL, &vsec);
5164 if (resourcevp)
5165 VN_RELE(resourcevp);
5166 break;
5167
5168 case ZFS_SMB_ACL_REMOVE:
5169 error = VOP_REMOVE(ZTOV(sharedir), zc->zc_string, kcred,
5170 NULL, 0);
5171 break;
5172
5173 case ZFS_SMB_ACL_RENAME:
5174 if ((error = get_nvlist(zc->zc_nvlist_src,
5175 zc->zc_nvlist_src_size, zc->zc_iflags, &nvlist)) != 0) {
5176 VN_RELE(vp);
5177 VN_RELE(ZTOV(sharedir));
5178 ZFS_EXIT(zfsvfs);
5179 return (error);
5180 }
5181 if (nvlist_lookup_string(nvlist, ZFS_SMB_ACL_SRC, &src) ||
5182 nvlist_lookup_string(nvlist, ZFS_SMB_ACL_TARGET,
5183 &target)) {
5184 VN_RELE(vp);
5185 VN_RELE(ZTOV(sharedir));
5186 ZFS_EXIT(zfsvfs);
5187 nvlist_free(nvlist);
5188 return (error);
5189 }
5190 error = VOP_RENAME(ZTOV(sharedir), src, ZTOV(sharedir), target,
5191 kcred, NULL, 0);
5192 nvlist_free(nvlist);
5193 break;
5194
5195 case ZFS_SMB_ACL_PURGE:
5196 error = zfs_smb_acl_purge(sharedir);
5197 break;
5198
5199 default:
5200 error = SET_ERROR(EINVAL);
5201 break;
5202 }
5203
5204 VN_RELE(vp);
5205 VN_RELE(ZTOV(sharedir));
5206
5207 ZFS_EXIT(zfsvfs);
5208
5209 return (error);
5210 }
5211
5212 /*
5213 * innvl: {
5214 * "holds" -> { snapname -> holdname (string), ... }
5215 * (optional) "cleanup_fd" -> fd (int32)
5216 * }
5217 *
5218 * outnvl: {
5219 * snapname -> error value (int32)
5220 * ...
5221 * }
5222 */
5223 /* ARGSUSED */
5224 static int
5225 zfs_ioc_hold(const char *pool, nvlist_t *args, nvlist_t *errlist)
5226 {
5227 nvpair_t *pair;
5228 nvlist_t *holds;
5229 int cleanup_fd = -1;
5230 int error;
5231 minor_t minor = 0;
5232
5233 error = nvlist_lookup_nvlist(args, "holds", &holds);
5234 if (error != 0)
5235 return (SET_ERROR(EINVAL));
5236
5237 /* make sure the user didn't pass us any invalid (empty) tags */
5238 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
5239 pair = nvlist_next_nvpair(holds, pair)) {
5240 char *htag;
5241
5242 error = nvpair_value_string(pair, &htag);
5243 if (error != 0)
5244 return (SET_ERROR(error));
5245
5246 if (strlen(htag) == 0)
5247 return (SET_ERROR(EINVAL));
5248 }
5249
5250 if (nvlist_lookup_int32(args, "cleanup_fd", &cleanup_fd) == 0) {
5251 error = zfs_onexit_fd_hold(cleanup_fd, &minor);
5252 if (error != 0)
5253 return (error);
5254 }
5255
5256 error = dsl_dataset_user_hold(holds, minor, errlist);
5257 if (minor != 0)
5258 zfs_onexit_fd_rele(cleanup_fd);
5259 return (error);
5260 }
5261
5262 /*
5263 * innvl is not used.
5264 *
5265 * outnvl: {
5266 * holdname -> time added (uint64 seconds since epoch)
5267 * ...
5268 * }
5269 */
5270 /* ARGSUSED */
5271 static int
5272 zfs_ioc_get_holds(const char *snapname, nvlist_t *args, nvlist_t *outnvl)
5273 {
5274 return (dsl_dataset_get_holds(snapname, outnvl));
5275 }
5276
5277 /*
5278 * innvl: {
5279 * snapname -> { holdname, ... }
5280 * ...
5281 * }
5282 *
5283 * outnvl: {
5284 * snapname -> error value (int32)
5285 * ...
5286 * }
5287 */
5288 /* ARGSUSED */
5289 static int
5290 zfs_ioc_release(const char *pool, nvlist_t *holds, nvlist_t *errlist)
5291 {
5292 return (dsl_dataset_user_release(holds, errlist));
5293 }
5294
5295 /*
5296 * inputs:
5297 * zc_name name of new filesystem or snapshot
5298 * zc_value full name of old snapshot
5299 *
5300 * outputs:
5301 * zc_cookie space in bytes
5302 * zc_objset_type compressed space in bytes
5303 * zc_perm_action uncompressed space in bytes
5304 */
5305 static int
5306 zfs_ioc_space_written(zfs_cmd_t *zc)
5307 {
5308 int error;
5309 dsl_pool_t *dp;
5310 dsl_dataset_t *new, *old;
5311
5312 error = dsl_pool_hold(zc->zc_name, FTAG, &dp);
5313 if (error != 0)
5314 return (error);
5315 error = dsl_dataset_hold(dp, zc->zc_name, FTAG, &new);
5316 if (error != 0) {
5317 dsl_pool_rele(dp, FTAG);
5318 return (error);
5319 }
5320 error = dsl_dataset_hold(dp, zc->zc_value, FTAG, &old);
5321 if (error != 0) {
5322 dsl_dataset_rele(new, FTAG);
5323 dsl_pool_rele(dp, FTAG);
5324 return (error);
5325 }
5326
5327 error = dsl_dataset_space_written(old, new, &zc->zc_cookie,
5328 &zc->zc_objset_type, &zc->zc_perm_action);
5329 dsl_dataset_rele(old, FTAG);
5330 dsl_dataset_rele(new, FTAG);
5331 dsl_pool_rele(dp, FTAG);
5332 return (error);
5333 }
5334
5335 /*
5336 * innvl: {
5337 * "firstsnap" -> snapshot name
5338 * }
5339 *
5340 * outnvl: {
5341 * "used" -> space in bytes
5342 * "compressed" -> compressed space in bytes
5343 * "uncompressed" -> uncompressed space in bytes
5344 * }
5345 */
5346 static int
5347 zfs_ioc_space_snaps(const char *lastsnap, nvlist_t *innvl, nvlist_t *outnvl)
5348 {
5349 int error;
5350 dsl_pool_t *dp;
5351 dsl_dataset_t *new, *old;
5352 char *firstsnap;
5353 uint64_t used, comp, uncomp;
5354
5355 if (nvlist_lookup_string(innvl, "firstsnap", &firstsnap) != 0)
5356 return (SET_ERROR(EINVAL));
5357
5358 error = dsl_pool_hold(lastsnap, FTAG, &dp);
5359 if (error != 0)
5360 return (error);
5361
5362 error = dsl_dataset_hold(dp, lastsnap, FTAG, &new);
5363 if (error == 0 && !new->ds_is_snapshot) {
5364 dsl_dataset_rele(new, FTAG);
5365 error = SET_ERROR(EINVAL);
5366 }
5367 if (error != 0) {
5368 dsl_pool_rele(dp, FTAG);
5369 return (error);
5370 }
5371 error = dsl_dataset_hold(dp, firstsnap, FTAG, &old);
5372 if (error == 0 && !old->ds_is_snapshot) {
5373 dsl_dataset_rele(old, FTAG);
5374 error = SET_ERROR(EINVAL);
5375 }
5376 if (error != 0) {
5377 dsl_dataset_rele(new, FTAG);
5378 dsl_pool_rele(dp, FTAG);
5379 return (error);
5380 }
5381
5382 error = dsl_dataset_space_wouldfree(old, new, &used, &comp, &uncomp);
5383 dsl_dataset_rele(old, FTAG);
5384 dsl_dataset_rele(new, FTAG);
5385 dsl_pool_rele(dp, FTAG);
5386 fnvlist_add_uint64(outnvl, "used", used);
5387 fnvlist_add_uint64(outnvl, "compressed", comp);
5388 fnvlist_add_uint64(outnvl, "uncompressed", uncomp);
5389 return (error);
5390 }
5391
5392 /*
5393 * innvl: {
5394 * "fd" -> file descriptor to write stream to (int32)
5395 * (optional) "fromsnap" -> full snap name to send an incremental from
5396 * (optional) "largeblockok" -> (value ignored)
5397 * indicates that blocks > 128KB are permitted
5398 * (optional) "embedok" -> (value ignored)
5399 * presence indicates DRR_WRITE_EMBEDDED records are permitted
5400 * (optional) "resume_object" and "resume_offset" -> (uint64)
5401 * if present, resume send stream from specified object and offset.
5402 * }
5403 *
5404 * outnvl is unused
5405 */
5406 /* ARGSUSED */
5407 static int
5408 zfs_ioc_send_new(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5409 {
5410 int error;
5411 offset_t off;
5412 char *fromname = NULL;
5413 int fd;
5414 boolean_t largeblockok;
5415 boolean_t embedok;
5416 uint64_t resumeobj = 0;
5417 uint64_t resumeoff = 0;
5418
5419 error = nvlist_lookup_int32(innvl, "fd", &fd);
5420 if (error != 0)
5421 return (SET_ERROR(EINVAL));
5422
5423 (void) nvlist_lookup_string(innvl, "fromsnap", &fromname);
5424
5425 largeblockok = nvlist_exists(innvl, "largeblockok");
5426 embedok = nvlist_exists(innvl, "embedok");
5427
5428 (void) nvlist_lookup_uint64(innvl, "resume_object", &resumeobj);
5429 (void) nvlist_lookup_uint64(innvl, "resume_offset", &resumeoff);
5430
5431 file_t *fp = getf(fd);
5432 if (fp == NULL)
5433 return (SET_ERROR(EBADF));
5434
5435 off = fp->f_offset;
5436 error = dmu_send(snapname, fromname, embedok, largeblockok, fd,
5437 resumeobj, resumeoff, fp->f_vnode, &off);
5438
5439 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
5440 fp->f_offset = off;
5441 releasef(fd);
5442 return (error);
5443 }
5444
5445 /*
5446 * Determine approximately how large a zfs send stream will be -- the number
5447 * of bytes that will be written to the fd supplied to zfs_ioc_send_new().
5448 *
5449 * innvl: {
5450 * (optional) "from" -> full snap or bookmark name to send an incremental
5451 * from
5452 * }
5453 *
5454 * outnvl: {
5455 * "space" -> bytes of space (uint64)
5456 * }
5457 */
5458 static int
5459 zfs_ioc_send_space(const char *snapname, nvlist_t *innvl, nvlist_t *outnvl)
5460 {
5461 dsl_pool_t *dp;
5462 dsl_dataset_t *tosnap;
5463 int error;
5464 char *fromname;
5465 uint64_t space;
5466
5467 error = dsl_pool_hold(snapname, FTAG, &dp);
5468 if (error != 0)
5469 return (error);
5470
5471 error = dsl_dataset_hold(dp, snapname, FTAG, &tosnap);
5472 if (error != 0) {
5473 dsl_pool_rele(dp, FTAG);
5474 return (error);
5475 }
5476
5477 error = nvlist_lookup_string(innvl, "from", &fromname);
5478 if (error == 0) {
5479 if (strchr(fromname, '@') != NULL) {
5480 /*
5481 * If from is a snapshot, hold it and use the more
5482 * efficient dmu_send_estimate to estimate send space
5483 * size using deadlists.
5484 */
5485 dsl_dataset_t *fromsnap;
5486 error = dsl_dataset_hold(dp, fromname, FTAG, &fromsnap);
5487 if (error != 0)
5488 goto out;
5489 error = dmu_send_estimate(tosnap, fromsnap, &space);
5490 dsl_dataset_rele(fromsnap, FTAG);
5491 } else if (strchr(fromname, '#') != NULL) {
5492 /*
5493 * If from is a bookmark, fetch the creation TXG of the
5494 * snapshot it was created from and use that to find
5495 * blocks that were born after it.
5496 */
5497 zfs_bookmark_phys_t frombm;
5498
5499 error = dsl_bookmark_lookup(dp, fromname, tosnap,
5500 &frombm);
5501 if (error != 0)
5502 goto out;
5503 error = dmu_send_estimate_from_txg(tosnap,
5504 frombm.zbm_creation_txg, &space);
5505 } else {
5506 /*
5507 * from is not properly formatted as a snapshot or
5508 * bookmark
5509 */
5510 error = SET_ERROR(EINVAL);
5511 goto out;
5512 }
5513 } else {
5514 // If estimating the size of a full send, use dmu_send_estimate
5515 error = dmu_send_estimate(tosnap, NULL, &space);
5516 }
5517
5518 fnvlist_add_uint64(outnvl, "space", space);
5519
5520 out:
5521 dsl_dataset_rele(tosnap, FTAG);
5522 dsl_pool_rele(dp, FTAG);
5523 return (error);
5524 }
5525
5526 static zfs_ioc_vec_t zfs_ioc_vec[ZFS_IOC_LAST - ZFS_IOC_FIRST];
5527
5528 static void
5529 zfs_ioctl_register_legacy(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5530 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5531 boolean_t log_history, zfs_ioc_poolcheck_t pool_check)
5532 {
5533 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5534
5535 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5536 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5537 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5538 ASSERT3P(vec->zvec_func, ==, NULL);
5539
5540 vec->zvec_legacy_func = func;
5541 vec->zvec_secpolicy = secpolicy;
5542 vec->zvec_namecheck = namecheck;
5543 vec->zvec_allow_log = log_history;
5544 vec->zvec_pool_check = pool_check;
5545 }
5546
5547 /*
5548 * See the block comment at the beginning of this file for details on
5549 * each argument to this function.
5550 */
5551 static void
5552 zfs_ioctl_register(const char *name, zfs_ioc_t ioc, zfs_ioc_func_t *func,
5553 zfs_secpolicy_func_t *secpolicy, zfs_ioc_namecheck_t namecheck,
5554 zfs_ioc_poolcheck_t pool_check, boolean_t smush_outnvlist,
5555 boolean_t allow_log)
5556 {
5557 zfs_ioc_vec_t *vec = &zfs_ioc_vec[ioc - ZFS_IOC_FIRST];
5558
5559 ASSERT3U(ioc, >=, ZFS_IOC_FIRST);
5560 ASSERT3U(ioc, <, ZFS_IOC_LAST);
5561 ASSERT3P(vec->zvec_legacy_func, ==, NULL);
5562 ASSERT3P(vec->zvec_func, ==, NULL);
5563
5564 /* if we are logging, the name must be valid */
5565 ASSERT(!allow_log || namecheck != NO_NAME);
5566
5567 vec->zvec_name = name;
5568 vec->zvec_func = func;
5569 vec->zvec_secpolicy = secpolicy;
5570 vec->zvec_namecheck = namecheck;
5571 vec->zvec_pool_check = pool_check;
5572 vec->zvec_smush_outnvlist = smush_outnvlist;
5573 vec->zvec_allow_log = allow_log;
5574 }
5575
5576 static void
5577 zfs_ioctl_register_pool(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5578 zfs_secpolicy_func_t *secpolicy, boolean_t log_history,
5579 zfs_ioc_poolcheck_t pool_check)
5580 {
5581 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5582 POOL_NAME, log_history, pool_check);
5583 }
5584
5585 static void
5586 zfs_ioctl_register_dataset_nolog(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5587 zfs_secpolicy_func_t *secpolicy, zfs_ioc_poolcheck_t pool_check)
5588 {
5589 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5590 DATASET_NAME, B_FALSE, pool_check);
5591 }
5592
5593 static void
5594 zfs_ioctl_register_pool_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5595 {
5596 zfs_ioctl_register_legacy(ioc, func, zfs_secpolicy_config,
5597 POOL_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5598 }
5599
5600 static void
5601 zfs_ioctl_register_pool_meta(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5602 zfs_secpolicy_func_t *secpolicy)
5603 {
5604 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5605 NO_NAME, B_FALSE, POOL_CHECK_NONE);
5606 }
5607
5608 static void
5609 zfs_ioctl_register_dataset_read_secpolicy(zfs_ioc_t ioc,
5610 zfs_ioc_legacy_func_t *func, zfs_secpolicy_func_t *secpolicy)
5611 {
5612 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5613 DATASET_NAME, B_FALSE, POOL_CHECK_SUSPENDED);
5614 }
5615
5616 static void
5617 zfs_ioctl_register_dataset_read(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func)
5618 {
5619 zfs_ioctl_register_dataset_read_secpolicy(ioc, func,
5620 zfs_secpolicy_read);
5621 }
5622
5623 static void
5624 zfs_ioctl_register_dataset_modify(zfs_ioc_t ioc, zfs_ioc_legacy_func_t *func,
5625 zfs_secpolicy_func_t *secpolicy)
5626 {
5627 zfs_ioctl_register_legacy(ioc, func, secpolicy,
5628 DATASET_NAME, B_TRUE, POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5629 }
5630
5631 static void
5632 zfs_ioctl_init(void)
5633 {
5634 zfs_ioctl_register("snapshot", ZFS_IOC_SNAPSHOT,
5635 zfs_ioc_snapshot, zfs_secpolicy_snapshot, POOL_NAME,
5636 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5637
5638 zfs_ioctl_register("log_history", ZFS_IOC_LOG_HISTORY,
5639 zfs_ioc_log_history, zfs_secpolicy_log_history, NO_NAME,
5640 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_FALSE);
5641
5642 zfs_ioctl_register("space_snaps", ZFS_IOC_SPACE_SNAPS,
5643 zfs_ioc_space_snaps, zfs_secpolicy_read, DATASET_NAME,
5644 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5645
5646 zfs_ioctl_register("send", ZFS_IOC_SEND_NEW,
5647 zfs_ioc_send_new, zfs_secpolicy_send_new, DATASET_NAME,
5648 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5649
5650 zfs_ioctl_register("send_space", ZFS_IOC_SEND_SPACE,
5651 zfs_ioc_send_space, zfs_secpolicy_read, DATASET_NAME,
5652 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5653
5654 zfs_ioctl_register("create", ZFS_IOC_CREATE,
5655 zfs_ioc_create, zfs_secpolicy_create_clone, DATASET_NAME,
5656 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5657
5658 zfs_ioctl_register("clone", ZFS_IOC_CLONE,
5659 zfs_ioc_clone, zfs_secpolicy_create_clone, DATASET_NAME,
5660 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5661
5662 zfs_ioctl_register("destroy_snaps", ZFS_IOC_DESTROY_SNAPS,
5663 zfs_ioc_destroy_snaps, zfs_secpolicy_destroy_snaps, POOL_NAME,
5664 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5665
5666 zfs_ioctl_register("hold", ZFS_IOC_HOLD,
5667 zfs_ioc_hold, zfs_secpolicy_hold, POOL_NAME,
5668 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5669 zfs_ioctl_register("release", ZFS_IOC_RELEASE,
5670 zfs_ioc_release, zfs_secpolicy_release, POOL_NAME,
5671 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5672
5673 zfs_ioctl_register("get_holds", ZFS_IOC_GET_HOLDS,
5674 zfs_ioc_get_holds, zfs_secpolicy_read, DATASET_NAME,
5675 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5676
5677 zfs_ioctl_register("rollback", ZFS_IOC_ROLLBACK,
5678 zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME,
5679 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_FALSE, B_TRUE);
5680
5681 zfs_ioctl_register("bookmark", ZFS_IOC_BOOKMARK,
5682 zfs_ioc_bookmark, zfs_secpolicy_bookmark, POOL_NAME,
5683 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5684
5685 zfs_ioctl_register("get_bookmarks", ZFS_IOC_GET_BOOKMARKS,
5686 zfs_ioc_get_bookmarks, zfs_secpolicy_read, DATASET_NAME,
5687 POOL_CHECK_SUSPENDED, B_FALSE, B_FALSE);
5688
5689 zfs_ioctl_register("destroy_bookmarks", ZFS_IOC_DESTROY_BOOKMARKS,
5690 zfs_ioc_destroy_bookmarks, zfs_secpolicy_destroy_bookmarks,
5691 POOL_NAME,
5692 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY, B_TRUE, B_TRUE);
5693
5694 /* IOCTLS that use the legacy function signature */
5695
5696 zfs_ioctl_register_legacy(ZFS_IOC_POOL_FREEZE, zfs_ioc_pool_freeze,
5697 zfs_secpolicy_config, NO_NAME, B_FALSE, POOL_CHECK_READONLY);
5698
5699 zfs_ioctl_register_pool(ZFS_IOC_POOL_CREATE, zfs_ioc_pool_create,
5700 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5701 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SCAN,
5702 zfs_ioc_pool_scan);
5703 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_UPGRADE,
5704 zfs_ioc_pool_upgrade);
5705 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ADD,
5706 zfs_ioc_vdev_add);
5707 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_REMOVE,
5708 zfs_ioc_vdev_remove);
5709 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SET_STATE,
5710 zfs_ioc_vdev_set_state);
5711 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_ATTACH,
5712 zfs_ioc_vdev_attach);
5713 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_DETACH,
5714 zfs_ioc_vdev_detach);
5715 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETPATH,
5716 zfs_ioc_vdev_setpath);
5717 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SETFRU,
5718 zfs_ioc_vdev_setfru);
5719 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_SET_PROPS,
5720 zfs_ioc_pool_set_props);
5721 zfs_ioctl_register_pool_modify(ZFS_IOC_VDEV_SPLIT,
5722 zfs_ioc_vdev_split);
5723 zfs_ioctl_register_pool_modify(ZFS_IOC_POOL_REGUID,
5724 zfs_ioc_pool_reguid);
5725
5726 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_CONFIGS,
5727 zfs_ioc_pool_configs, zfs_secpolicy_none);
5728 zfs_ioctl_register_pool_meta(ZFS_IOC_POOL_TRYIMPORT,
5729 zfs_ioc_pool_tryimport, zfs_secpolicy_config);
5730 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_FAULT,
5731 zfs_ioc_inject_fault, zfs_secpolicy_inject);
5732 zfs_ioctl_register_pool_meta(ZFS_IOC_CLEAR_FAULT,
5733 zfs_ioc_clear_fault, zfs_secpolicy_inject);
5734 zfs_ioctl_register_pool_meta(ZFS_IOC_INJECT_LIST_NEXT,
5735 zfs_ioc_inject_list_next, zfs_secpolicy_inject);
5736
5737 /*
5738 * pool destroy, and export don't log the history as part of
5739 * zfsdev_ioctl, but rather zfs_ioc_pool_export
5740 * does the logging of those commands.
5741 */
5742 zfs_ioctl_register_pool(ZFS_IOC_POOL_DESTROY, zfs_ioc_pool_destroy,
5743 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5744 zfs_ioctl_register_pool(ZFS_IOC_POOL_EXPORT, zfs_ioc_pool_export,
5745 zfs_secpolicy_config, B_FALSE, POOL_CHECK_NONE);
5746
5747 zfs_ioctl_register_pool(ZFS_IOC_POOL_STATS, zfs_ioc_pool_stats,
5748 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5749 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_PROPS, zfs_ioc_pool_get_props,
5750 zfs_secpolicy_read, B_FALSE, POOL_CHECK_NONE);
5751
5752 zfs_ioctl_register_pool(ZFS_IOC_ERROR_LOG, zfs_ioc_error_log,
5753 zfs_secpolicy_inject, B_FALSE, POOL_CHECK_SUSPENDED);
5754 zfs_ioctl_register_pool(ZFS_IOC_DSOBJ_TO_DSNAME,
5755 zfs_ioc_dsobj_to_dsname,
5756 zfs_secpolicy_diff, B_FALSE, POOL_CHECK_SUSPENDED);
5757 zfs_ioctl_register_pool(ZFS_IOC_POOL_GET_HISTORY,
5758 zfs_ioc_pool_get_history,
5759 zfs_secpolicy_config, B_FALSE, POOL_CHECK_SUSPENDED);
5760
5761 zfs_ioctl_register_pool(ZFS_IOC_POOL_IMPORT, zfs_ioc_pool_import,
5762 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5763
5764 zfs_ioctl_register_pool(ZFS_IOC_CLEAR, zfs_ioc_clear,
5765 zfs_secpolicy_config, B_TRUE, POOL_CHECK_NONE);
5766 zfs_ioctl_register_pool(ZFS_IOC_POOL_REOPEN, zfs_ioc_pool_reopen,
5767 zfs_secpolicy_config, B_TRUE, POOL_CHECK_SUSPENDED);
5768
5769 zfs_ioctl_register_dataset_read(ZFS_IOC_SPACE_WRITTEN,
5770 zfs_ioc_space_written);
5771 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_RECVD_PROPS,
5772 zfs_ioc_objset_recvd_props);
5773 zfs_ioctl_register_dataset_read(ZFS_IOC_NEXT_OBJ,
5774 zfs_ioc_next_obj);
5775 zfs_ioctl_register_dataset_read(ZFS_IOC_GET_FSACL,
5776 zfs_ioc_get_fsacl);
5777 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_STATS,
5778 zfs_ioc_objset_stats);
5779 zfs_ioctl_register_dataset_read(ZFS_IOC_OBJSET_ZPLPROPS,
5780 zfs_ioc_objset_zplprops);
5781 zfs_ioctl_register_dataset_read(ZFS_IOC_DATASET_LIST_NEXT,
5782 zfs_ioc_dataset_list_next);
5783 zfs_ioctl_register_dataset_read(ZFS_IOC_SNAPSHOT_LIST_NEXT,
5784 zfs_ioc_snapshot_list_next);
5785 zfs_ioctl_register_dataset_read(ZFS_IOC_SEND_PROGRESS,
5786 zfs_ioc_send_progress);
5787
5788 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_DIFF,
5789 zfs_ioc_diff, zfs_secpolicy_diff);
5790 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_STATS,
5791 zfs_ioc_obj_to_stats, zfs_secpolicy_diff);
5792 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_OBJ_TO_PATH,
5793 zfs_ioc_obj_to_path, zfs_secpolicy_diff);
5794 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_ONE,
5795 zfs_ioc_userspace_one, zfs_secpolicy_userspace_one);
5796 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_USERSPACE_MANY,
5797 zfs_ioc_userspace_many, zfs_secpolicy_userspace_many);
5798 zfs_ioctl_register_dataset_read_secpolicy(ZFS_IOC_SEND,
5799 zfs_ioc_send, zfs_secpolicy_send);
5800
5801 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_PROP, zfs_ioc_set_prop,
5802 zfs_secpolicy_none);
5803 zfs_ioctl_register_dataset_modify(ZFS_IOC_DESTROY, zfs_ioc_destroy,
5804 zfs_secpolicy_destroy);
5805 zfs_ioctl_register_dataset_modify(ZFS_IOC_RENAME, zfs_ioc_rename,
5806 zfs_secpolicy_rename);
5807 zfs_ioctl_register_dataset_modify(ZFS_IOC_RECV, zfs_ioc_recv,
5808 zfs_secpolicy_recv);
5809 zfs_ioctl_register_dataset_modify(ZFS_IOC_PROMOTE, zfs_ioc_promote,
5810 zfs_secpolicy_promote);
5811 zfs_ioctl_register_dataset_modify(ZFS_IOC_INHERIT_PROP,
5812 zfs_ioc_inherit_prop, zfs_secpolicy_inherit_prop);
5813 zfs_ioctl_register_dataset_modify(ZFS_IOC_SET_FSACL, zfs_ioc_set_fsacl,
5814 zfs_secpolicy_set_fsacl);
5815
5816 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SHARE, zfs_ioc_share,
5817 zfs_secpolicy_share, POOL_CHECK_NONE);
5818 zfs_ioctl_register_dataset_nolog(ZFS_IOC_SMB_ACL, zfs_ioc_smb_acl,
5819 zfs_secpolicy_smb_acl, POOL_CHECK_NONE);
5820 zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,
5821 zfs_ioc_userspace_upgrade, zfs_secpolicy_userspace_upgrade,
5822 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5823 zfs_ioctl_register_dataset_nolog(ZFS_IOC_TMP_SNAPSHOT,
5824 zfs_ioc_tmp_snapshot, zfs_secpolicy_tmp_snapshot,
5825 POOL_CHECK_SUSPENDED | POOL_CHECK_READONLY);
5826 }
5827
5828 int
5829 pool_status_check(const char *name, zfs_ioc_namecheck_t type,
5830 zfs_ioc_poolcheck_t check)
5831 {
5832 spa_t *spa;
5833 int error;
5834
5835 ASSERT(type == POOL_NAME || type == DATASET_NAME);
5836
5837 if (check & POOL_CHECK_NONE)
5838 return (0);
5839
5840 error = spa_open(name, &spa, FTAG);
5841 if (error == 0) {
5842 if ((check & POOL_CHECK_SUSPENDED) && spa_suspended(spa))
5843 error = SET_ERROR(EAGAIN);
5844 else if ((check & POOL_CHECK_READONLY) && !spa_writeable(spa))
5845 error = SET_ERROR(EROFS);
5846 spa_close(spa, FTAG);
5847 }
5848 return (error);
5849 }
5850
5851 /*
5852 * Find a free minor number.
5853 */
5854 minor_t
5855 zfsdev_minor_alloc(void)
5856 {
5857 static minor_t last_minor;
5858 minor_t m;
5859
5860 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5861
5862 for (m = last_minor + 1; m != last_minor; m++) {
5863 if (m > ZFSDEV_MAX_MINOR)
5864 m = 1;
5865 if (ddi_get_soft_state(zfsdev_state, m) == NULL) {
5866 last_minor = m;
5867 return (m);
5868 }
5869 }
5870
5871 return (0);
5872 }
5873
5874 static int
5875 zfs_ctldev_init(dev_t *devp)
5876 {
5877 minor_t minor;
5878 zfs_soft_state_t *zs;
5879
5880 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5881 ASSERT(getminor(*devp) == 0);
5882
5883 minor = zfsdev_minor_alloc();
5884 if (minor == 0)
5885 return (SET_ERROR(ENXIO));
5886
5887 if (ddi_soft_state_zalloc(zfsdev_state, minor) != DDI_SUCCESS)
5888 return (SET_ERROR(EAGAIN));
5889
5890 *devp = makedevice(getemajor(*devp), minor);
5891
5892 zs = ddi_get_soft_state(zfsdev_state, minor);
5893 zs->zss_type = ZSST_CTLDEV;
5894 zfs_onexit_init((zfs_onexit_t **)&zs->zss_data);
5895
5896 return (0);
5897 }
5898
5899 static void
5900 zfs_ctldev_destroy(zfs_onexit_t *zo, minor_t minor)
5901 {
5902 ASSERT(MUTEX_HELD(&zfsdev_state_lock));
5903
5904 zfs_onexit_destroy(zo);
5905 ddi_soft_state_free(zfsdev_state, minor);
5906 }
5907
5908 void *
5909 zfsdev_get_soft_state(minor_t minor, enum zfs_soft_state_type which)
5910 {
5911 zfs_soft_state_t *zp;
5912
5913 zp = ddi_get_soft_state(zfsdev_state, minor);
5914 if (zp == NULL || zp->zss_type != which)
5915 return (NULL);
5916
5917 return (zp->zss_data);
5918 }
5919
5920 static int
5921 zfsdev_open(dev_t *devp, int flag, int otyp, cred_t *cr)
5922 {
5923 int error = 0;
5924
5925 if (getminor(*devp) != 0)
5926 return (zvol_open(devp, flag, otyp, cr));
5927
5928 /* This is the control device. Allocate a new minor if requested. */
5929 if (flag & FEXCL) {
5930 mutex_enter(&zfsdev_state_lock);
5931 error = zfs_ctldev_init(devp);
5932 mutex_exit(&zfsdev_state_lock);
5933 }
5934
5935 return (error);
5936 }
5937
5938 static int
5939 zfsdev_close(dev_t dev, int flag, int otyp, cred_t *cr)
5940 {
5941 zfs_onexit_t *zo;
5942 minor_t minor = getminor(dev);
5943
5944 if (minor == 0)
5945 return (0);
5946
5947 mutex_enter(&zfsdev_state_lock);
5948 zo = zfsdev_get_soft_state(minor, ZSST_CTLDEV);
5949 if (zo == NULL) {
5950 mutex_exit(&zfsdev_state_lock);
5951 return (zvol_close(dev, flag, otyp, cr));
5952 }
5953 zfs_ctldev_destroy(zo, minor);
5954 mutex_exit(&zfsdev_state_lock);
5955
5956 return (0);
5957 }
5958
5959 static int
5960 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
5961 {
5962 zfs_cmd_t *zc;
5963 uint_t vecnum;
5964 int error, rc, len;
5965 minor_t minor = getminor(dev);
5966 const zfs_ioc_vec_t *vec;
5967 char *saved_poolname = NULL;
5968 nvlist_t *innvl = NULL;
5969
5970 if (minor != 0 &&
5971 zfsdev_get_soft_state(minor, ZSST_CTLDEV) == NULL)
5972 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
5973
5974 vecnum = cmd - ZFS_IOC_FIRST;
5975 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
5976
5977 if (vecnum >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
5978 return (SET_ERROR(EINVAL));
5979 vec = &zfs_ioc_vec[vecnum];
5980
5981 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
5982
5983 error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
5984 if (error != 0) {
5985 error = SET_ERROR(EFAULT);
5986 goto out;
5987 }
5988
5989 zc->zc_iflags = flag & FKIOCTL;
5990 if (zc->zc_nvlist_src_size != 0) {
5991 error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
5992 zc->zc_iflags, &innvl);
5993 if (error != 0)
5994 goto out;
5995 }
5996
5997 /*
5998 * Ensure that all pool/dataset names are valid before we pass down to
5999 * the lower layers.
6000 */
6001 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
6002 switch (vec->zvec_namecheck) {
6003 case POOL_NAME:
6004 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
6005 error = SET_ERROR(EINVAL);
6006 else
6007 error = pool_status_check(zc->zc_name,
6008 vec->zvec_namecheck, vec->zvec_pool_check);
6009 break;
6010
6011 case DATASET_NAME:
6012 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
6013 error = SET_ERROR(EINVAL);
6014 else
6015 error = pool_status_check(zc->zc_name,
6016 vec->zvec_namecheck, vec->zvec_pool_check);
6017 break;
6018
6019 case NO_NAME:
6020 break;
6021 }
6022
6023
6024 if (error == 0 && !(flag & FKIOCTL))
6025 error = vec->zvec_secpolicy(zc, innvl, cr);
6026
6027 if (error != 0)
6028 goto out;
6029
6030 /* legacy ioctls can modify zc_name */
6031 len = strcspn(zc->zc_name, "/@#") + 1;
6032 saved_poolname = kmem_alloc(len, KM_SLEEP);
6033 (void) strlcpy(saved_poolname, zc->zc_name, len);
6034
6035 if (vec->zvec_func != NULL) {
6036 nvlist_t *outnvl;
6037 int puterror = 0;
6038 spa_t *spa;
6039 nvlist_t *lognv = NULL;
6040
6041 ASSERT(vec->zvec_legacy_func == NULL);
6042
6043 /*
6044 * Add the innvl to the lognv before calling the func,
6045 * in case the func changes the innvl.
6046 */
6047 if (vec->zvec_allow_log) {
6048 lognv = fnvlist_alloc();
6049 fnvlist_add_string(lognv, ZPOOL_HIST_IOCTL,
6050 vec->zvec_name);
6051 if (!nvlist_empty(innvl)) {
6052 fnvlist_add_nvlist(lognv, ZPOOL_HIST_INPUT_NVL,
6053 innvl);
6054 }
6055 }
6056
6057 outnvl = fnvlist_alloc();
6058 error = vec->zvec_func(zc->zc_name, innvl, outnvl);
6059
6060 if (error == 0 && vec->zvec_allow_log &&
6061 spa_open(zc->zc_name, &spa, FTAG) == 0) {
6062 if (!nvlist_empty(outnvl)) {
6063 fnvlist_add_nvlist(lognv, ZPOOL_HIST_OUTPUT_NVL,
6064 outnvl);
6065 }
6066 (void) spa_history_log_nvl(spa, lognv);
6067 spa_close(spa, FTAG);
6068 }
6069 fnvlist_free(lognv);
6070
6071 if (!nvlist_empty(outnvl) || zc->zc_nvlist_dst_size != 0) {
6072 int smusherror = 0;
6073 if (vec->zvec_smush_outnvlist) {
6074 smusherror = nvlist_smush(outnvl,
6075 zc->zc_nvlist_dst_size);
6076 }
6077 if (smusherror == 0)
6078 puterror = put_nvlist(zc, outnvl);
6079 }
6080
6081 if (puterror != 0)
6082 error = puterror;
6083
6084 nvlist_free(outnvl);
6085 } else {
6086 error = vec->zvec_legacy_func(zc);
6087 }
6088
6089 out:
6090 nvlist_free(innvl);
6091 rc = ddi_copyout(zc, (void *)arg, sizeof (zfs_cmd_t), flag);
6092 if (error == 0 && rc != 0)
6093 error = SET_ERROR(EFAULT);
6094 if (error == 0 && vec->zvec_allow_log) {
6095 char *s = tsd_get(zfs_allow_log_key);
6096 if (s != NULL)
6097 strfree(s);
6098 (void) tsd_set(zfs_allow_log_key, saved_poolname);
6099 } else {
6100 if (saved_poolname != NULL)
6101 strfree(saved_poolname);
6102 }
6103
6104 kmem_free(zc, sizeof (zfs_cmd_t));
6105 return (error);
6106 }
6107
6108 static int
6109 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
6110 {
6111 if (cmd != DDI_ATTACH)
6112 return (DDI_FAILURE);
6113
6114 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
6115 DDI_PSEUDO, 0) == DDI_FAILURE)
6116 return (DDI_FAILURE);
6117
6118 zfs_dip = dip;
6119
6120 ddi_report_dev(dip);
6121
6122 return (DDI_SUCCESS);
6123 }
6124
6125 static int
6126 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
6127 {
6128 if (spa_busy() || zfs_busy() || zvol_busy())
6129 return (DDI_FAILURE);
6130
6131 if (cmd != DDI_DETACH)
6132 return (DDI_FAILURE);
6133
6134 zfs_dip = NULL;
6135
6136 ddi_prop_remove_all(dip);
6137 ddi_remove_minor_node(dip, NULL);
6138
6139 return (DDI_SUCCESS);
6140 }
6141
6142 /*ARGSUSED*/
6143 static int
6144 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
6145 {
6146 switch (infocmd) {
6147 case DDI_INFO_DEVT2DEVINFO:
6148 *result = zfs_dip;
6149 return (DDI_SUCCESS);
6150
6151 case DDI_INFO_DEVT2INSTANCE:
6152 *result = (void *)0;
6153 return (DDI_SUCCESS);
6154 }
6155
6156 return (DDI_FAILURE);
6157 }
6158
6159 /*
6160 * OK, so this is a little weird.
6161 *
6162 * /dev/zfs is the control node, i.e. minor 0.
6163 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
6164 *
6165 * /dev/zfs has basically nothing to do except serve up ioctls,
6166 * so most of the standard driver entry points are in zvol.c.
6167 */
6168 static struct cb_ops zfs_cb_ops = {
6169 zfsdev_open, /* open */
6170 zfsdev_close, /* close */
6171 zvol_strategy, /* strategy */
6172 nodev, /* print */
6173 zvol_dump, /* dump */
6174 zvol_read, /* read */
6175 zvol_write, /* write */
6176 zfsdev_ioctl, /* ioctl */
6177 nodev, /* devmap */
6178 nodev, /* mmap */
6179 nodev, /* segmap */
6180 nochpoll, /* poll */
6181 ddi_prop_op, /* prop_op */
6182 NULL, /* streamtab */
6183 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
6184 CB_REV, /* version */
6185 nodev, /* async read */
6186 nodev, /* async write */
6187 };
6188
6189 static struct dev_ops zfs_dev_ops = {
6190 DEVO_REV, /* version */
6191 0, /* refcnt */
6192 zfs_info, /* info */
6193 nulldev, /* identify */
6194 nulldev, /* probe */
6195 zfs_attach, /* attach */
6196 zfs_detach, /* detach */
6197 nodev, /* reset */
6198 &zfs_cb_ops, /* driver operations */
6199 NULL, /* no bus operations */
6200 NULL, /* power */
6201 ddi_quiesce_not_needed, /* quiesce */
6202 };
6203
6204 static struct modldrv zfs_modldrv = {
6205 &mod_driverops,
6206 "ZFS storage pool",
6207 &zfs_dev_ops
6208 };
6209
6210 static struct modlinkage modlinkage = {
6211 MODREV_1,
6212 (void *)&zfs_modlfs,
6213 (void *)&zfs_modldrv,
6214 NULL
6215 };
6216
6217 static void
6218 zfs_allow_log_destroy(void *arg)
6219 {
6220 char *poolname = arg;
6221 strfree(poolname);
6222 }
6223
6224 int
6225 _init(void)
6226 {
6227 int error;
6228
6229 spa_init(FREAD | FWRITE);
6230 zfs_init();
6231 zvol_init();
6232 zfs_ioctl_init();
6233
6234 if ((error = mod_install(&modlinkage)) != 0) {
6235 zvol_fini();
6236 zfs_fini();
6237 spa_fini();
6238 return (error);
6239 }
6240
6241 tsd_create(&zfs_fsyncer_key, NULL);
6242 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
6243 tsd_create(&zfs_allow_log_key, zfs_allow_log_destroy);
6244
6245 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
6246 ASSERT(error == 0);
6247 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
6248
6249 return (0);
6250 }
6251
6252 int
6253 _fini(void)
6254 {
6255 int error;
6256
6257 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
6258 return (SET_ERROR(EBUSY));
6259
6260 if ((error = mod_remove(&modlinkage)) != 0)
6261 return (error);
6262
6263 zvol_fini();
6264 zfs_fini();
6265 spa_fini();
6266 if (zfs_nfsshare_inited)
6267 (void) ddi_modclose(nfs_mod);
6268 if (zfs_smbshare_inited)
6269 (void) ddi_modclose(smbsrv_mod);
6270 if (zfs_nfsshare_inited || zfs_smbshare_inited)
6271 (void) ddi_modclose(sharefs_mod);
6272
6273 tsd_destroy(&zfs_fsyncer_key);
6274 ldi_ident_release(zfs_li);
6275 zfs_li = NULL;
6276 mutex_destroy(&zfs_share_lock);
6277
6278 return (error);
6279 }
6280
6281 int
6282 _info(struct modinfo *modinfop)
6283 {
6284 return (mod_info(&modlinkage, modinfop));
6285 }