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Remove stray stub kernel files which should be brought in my linux-kernel-module...
[mirror_zfs-debian.git] / zfs / lib / libdmu-ctl / zfs_ioctl.c
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 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #pragma ident "@(#)zfs_ioctl.c 1.61 08/04/27 SMI"
27
28 #include <sys/types.h>
29 #include <sys/param.h>
30 #include <sys/errno.h>
31 #include <sys/uio.h>
32 #include <sys/buf.h>
33 #include <sys/modctl.h>
34 #include <sys/open.h>
35 #include <sys/file.h>
36 #include <sys/kmem.h>
37 #include <sys/conf.h>
38 #include <sys/cmn_err.h>
39 #include <sys/stat.h>
40 #include <sys/zfs_ioctl.h>
41 #include <sys/zfs_znode.h>
42 #include <sys/zap.h>
43 #include <sys/spa.h>
44 #include <sys/spa_impl.h>
45 #include <sys/vdev.h>
46 #include <sys/vdev_impl.h>
47 #include <sys/dmu.h>
48 #include <sys/dsl_dir.h>
49 #include <sys/dsl_dataset.h>
50 #include <sys/dsl_prop.h>
51 #include <sys/dsl_deleg.h>
52 #include <sys/dmu_objset.h>
53 #include <sys/ddi.h>
54 #include <sys/sunddi.h>
55 #include <sys/sunldi.h>
56 #include <sys/policy.h>
57 #include <sys/zone.h>
58 #include <sys/nvpair.h>
59 #include <sys/pathname.h>
60 #include <sys/mount.h>
61 #include <sys/sdt.h>
62 #include <sys/fs/zfs.h>
63 #include <sys/zfs_ctldir.h>
64 #include <sys/zfs_dir.h>
65 #include <sys/zvol.h>
66 #include <sharefs/share.h>
67 #include <sys/dmu_objset.h>
68
69 #include "zfs_namecheck.h"
70 #include "zfs_prop.h"
71 #include "zfs_deleg.h"
72
73 extern struct modlfs zfs_modlfs;
74
75 extern void zfs_init(void);
76 extern void zfs_fini(void);
77
78 ldi_ident_t zfs_li = NULL;
79 dev_info_t *zfs_dip;
80
81 typedef int zfs_ioc_func_t(zfs_cmd_t *);
82 typedef int zfs_secpolicy_func_t(zfs_cmd_t *, cred_t *);
83
84 typedef struct zfs_ioc_vec {
85 zfs_ioc_func_t *zvec_func;
86 zfs_secpolicy_func_t *zvec_secpolicy;
87 enum {
88 NO_NAME,
89 POOL_NAME,
90 DATASET_NAME
91 } zvec_namecheck;
92 boolean_t zvec_his_log;
93 } zfs_ioc_vec_t;
94
95 /* _NOTE(PRINTFLIKE(4)) - this is printf-like, but lint is too whiney */
96 void
97 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
98 {
99 const char *newfile;
100 char buf[256];
101 va_list adx;
102
103 /*
104 * Get rid of annoying "../common/" prefix to filename.
105 */
106 newfile = strrchr(file, '/');
107 if (newfile != NULL) {
108 newfile = newfile + 1; /* Get rid of leading / */
109 } else {
110 newfile = file;
111 }
112
113 va_start(adx, fmt);
114 (void) vsnprintf(buf, sizeof (buf), fmt, adx);
115 va_end(adx);
116
117 /*
118 * To get this data, use the zfs-dprintf probe as so:
119 * dtrace -q -n 'zfs-dprintf \
120 * /stringof(arg0) == "dbuf.c"/ \
121 * {printf("%s: %s", stringof(arg1), stringof(arg3))}'
122 * arg0 = file name
123 * arg1 = function name
124 * arg2 = line number
125 * arg3 = message
126 */
127 DTRACE_PROBE4(zfs__dprintf,
128 char *, newfile, char *, func, int, line, char *, buf);
129 }
130
131 static void
132 history_str_free(char *buf)
133 {
134 kmem_free(buf, HIS_MAX_RECORD_LEN);
135 }
136
137 static char *
138 history_str_get(zfs_cmd_t *zc)
139 {
140 char *buf;
141
142 if (zc->zc_history == NULL)
143 return (NULL);
144
145 buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
146 if (copyinstr((void *)(uintptr_t)zc->zc_history,
147 buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
148 history_str_free(buf);
149 return (NULL);
150 }
151
152 buf[HIS_MAX_RECORD_LEN -1] = '\0';
153
154 return (buf);
155 }
156
157 /*
158 * zfs_check_version
159 *
160 * Return non-zero if the spa version is less than requested version.
161 */
162 static int
163 zfs_check_version(const char *name, int version)
164 {
165
166 spa_t *spa;
167
168 if (spa_open(name, &spa, FTAG) == 0) {
169 if (spa_version(spa) < version) {
170 spa_close(spa, FTAG);
171 return (1);
172 }
173 spa_close(spa, FTAG);
174 }
175 return (0);
176 }
177
178 /*
179 * zpl_check_version
180 *
181 * Return non-zero if the ZPL version is less than requested version.
182 */
183 static int
184 zpl_check_version(const char *name, int version)
185 {
186 objset_t *os;
187 int rc = 1;
188
189 if (dmu_objset_open(name, DMU_OST_ANY,
190 DS_MODE_STANDARD | DS_MODE_READONLY, &os) == 0) {
191 uint64_t propversion;
192
193 if (zfs_get_zplprop(os, ZFS_PROP_VERSION,
194 &propversion) == 0) {
195 rc = !(propversion >= version);
196 }
197 dmu_objset_close(os);
198 }
199 return (rc);
200 }
201
202 static void
203 zfs_log_history(zfs_cmd_t *zc)
204 {
205 spa_t *spa;
206 char *buf;
207
208 if ((buf = history_str_get(zc)) == NULL)
209 return;
210
211 if (spa_open(zc->zc_name, &spa, FTAG) == 0) {
212 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY)
213 (void) spa_history_log(spa, buf, LOG_CMD_NORMAL);
214 spa_close(spa, FTAG);
215 }
216 history_str_free(buf);
217 }
218
219 /*
220 * Policy for top-level read operations (list pools). Requires no privileges,
221 * and can be used in the local zone, as there is no associated dataset.
222 */
223 /* ARGSUSED */
224 static int
225 zfs_secpolicy_none(zfs_cmd_t *zc, cred_t *cr)
226 {
227 return (0);
228 }
229
230 /*
231 * Policy for dataset read operations (list children, get statistics). Requires
232 * no privileges, but must be visible in the local zone.
233 */
234 /* ARGSUSED */
235 static int
236 zfs_secpolicy_read(zfs_cmd_t *zc, cred_t *cr)
237 {
238 if (INGLOBALZONE(curproc) ||
239 zone_dataset_visible(zc->zc_name, NULL))
240 return (0);
241
242 return (ENOENT);
243 }
244
245 static int
246 zfs_dozonecheck(const char *dataset, cred_t *cr)
247 {
248 uint64_t zoned;
249 int writable = 1;
250
251 /*
252 * The dataset must be visible by this zone -- check this first
253 * so they don't see EPERM on something they shouldn't know about.
254 */
255 if (!INGLOBALZONE(curproc) &&
256 !zone_dataset_visible(dataset, &writable))
257 return (ENOENT);
258
259 if (dsl_prop_get_integer(dataset, "zoned", &zoned, NULL))
260 return (ENOENT);
261
262 if (INGLOBALZONE(curproc)) {
263 /*
264 * If the fs is zoned, only root can access it from the
265 * global zone.
266 */
267 if (secpolicy_zfs(cr) && zoned)
268 return (EPERM);
269 } else {
270 /*
271 * If we are in a local zone, the 'zoned' property must be set.
272 */
273 if (!zoned)
274 return (EPERM);
275
276 /* must be writable by this zone */
277 if (!writable)
278 return (EPERM);
279 }
280 return (0);
281 }
282
283 int
284 zfs_secpolicy_write_perms(const char *name, const char *perm, cred_t *cr)
285 {
286 int error;
287
288 error = zfs_dozonecheck(name, cr);
289 if (error == 0) {
290 error = secpolicy_zfs(cr);
291 if (error)
292 error = dsl_deleg_access(name, perm, cr);
293 }
294 return (error);
295 }
296
297 static int
298 zfs_secpolicy_setprop(const char *name, zfs_prop_t prop, cred_t *cr)
299 {
300 /*
301 * Check permissions for special properties.
302 */
303 switch (prop) {
304 case ZFS_PROP_ZONED:
305 /*
306 * Disallow setting of 'zoned' from within a local zone.
307 */
308 if (!INGLOBALZONE(curproc))
309 return (EPERM);
310 break;
311
312 case ZFS_PROP_QUOTA:
313 if (!INGLOBALZONE(curproc)) {
314 uint64_t zoned;
315 char setpoint[MAXNAMELEN];
316 /*
317 * Unprivileged users are allowed to modify the
318 * quota on things *under* (ie. contained by)
319 * the thing they own.
320 */
321 if (dsl_prop_get_integer(name, "zoned", &zoned,
322 setpoint))
323 return (EPERM);
324 if (!zoned || strlen(name) <= strlen(setpoint))
325 return (EPERM);
326 }
327 break;
328 }
329
330 return (zfs_secpolicy_write_perms(name, zfs_prop_to_name(prop), cr));
331 }
332
333 int
334 zfs_secpolicy_fsacl(zfs_cmd_t *zc, cred_t *cr)
335 {
336 int error;
337
338 error = zfs_dozonecheck(zc->zc_name, cr);
339 if (error)
340 return (error);
341
342 /*
343 * permission to set permissions will be evaluated later in
344 * dsl_deleg_can_allow()
345 */
346 return (0);
347 }
348
349 int
350 zfs_secpolicy_rollback(zfs_cmd_t *zc, cred_t *cr)
351 {
352 int error;
353 error = zfs_secpolicy_write_perms(zc->zc_name,
354 ZFS_DELEG_PERM_ROLLBACK, cr);
355 if (error == 0)
356 error = zfs_secpolicy_write_perms(zc->zc_name,
357 ZFS_DELEG_PERM_MOUNT, cr);
358 return (error);
359 }
360
361 int
362 zfs_secpolicy_send(zfs_cmd_t *zc, cred_t *cr)
363 {
364 return (zfs_secpolicy_write_perms(zc->zc_name,
365 ZFS_DELEG_PERM_SEND, cr));
366 }
367
368 int
369 zfs_secpolicy_share(zfs_cmd_t *zc, cred_t *cr)
370 {
371 if (!INGLOBALZONE(curproc))
372 return (EPERM);
373
374 if (secpolicy_nfs(cr) == 0) {
375 return (0);
376 } else {
377 vnode_t *vp;
378 int error;
379
380 if ((error = lookupname(zc->zc_value, UIO_SYSSPACE,
381 NO_FOLLOW, NULL, &vp)) != 0)
382 return (error);
383
384 /* Now make sure mntpnt and dataset are ZFS */
385
386 if (vp->v_vfsp->vfs_fstype != zfsfstype ||
387 (strcmp((char *)refstr_value(vp->v_vfsp->vfs_resource),
388 zc->zc_name) != 0)) {
389 VN_RELE(vp);
390 return (EPERM);
391 }
392
393 VN_RELE(vp);
394 return (dsl_deleg_access(zc->zc_name,
395 ZFS_DELEG_PERM_SHARE, cr));
396 }
397 }
398
399 static int
400 zfs_get_parent(const char *datasetname, char *parent, int parentsize)
401 {
402 char *cp;
403
404 /*
405 * Remove the @bla or /bla from the end of the name to get the parent.
406 */
407 (void) strncpy(parent, datasetname, parentsize);
408 cp = strrchr(parent, '@');
409 if (cp != NULL) {
410 cp[0] = '\0';
411 } else {
412 cp = strrchr(parent, '/');
413 if (cp == NULL)
414 return (ENOENT);
415 cp[0] = '\0';
416 }
417
418 return (0);
419 }
420
421 int
422 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
423 {
424 int error;
425
426 if ((error = zfs_secpolicy_write_perms(name,
427 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
428 return (error);
429
430 return (zfs_secpolicy_write_perms(name, ZFS_DELEG_PERM_DESTROY, cr));
431 }
432
433 static int
434 zfs_secpolicy_destroy(zfs_cmd_t *zc, cred_t *cr)
435 {
436 return (zfs_secpolicy_destroy_perms(zc->zc_name, cr));
437 }
438
439 /*
440 * Must have sys_config privilege to check the iscsi permission
441 */
442 /* ARGSUSED */
443 static int
444 zfs_secpolicy_iscsi(zfs_cmd_t *zc, cred_t *cr)
445 {
446 return (secpolicy_zfs(cr));
447 }
448
449 int
450 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
451 {
452 char parentname[MAXNAMELEN];
453 int error;
454
455 if ((error = zfs_secpolicy_write_perms(from,
456 ZFS_DELEG_PERM_RENAME, cr)) != 0)
457 return (error);
458
459 if ((error = zfs_secpolicy_write_perms(from,
460 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
461 return (error);
462
463 if ((error = zfs_get_parent(to, parentname,
464 sizeof (parentname))) != 0)
465 return (error);
466
467 if ((error = zfs_secpolicy_write_perms(parentname,
468 ZFS_DELEG_PERM_CREATE, cr)) != 0)
469 return (error);
470
471 if ((error = zfs_secpolicy_write_perms(parentname,
472 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
473 return (error);
474
475 return (error);
476 }
477
478 static int
479 zfs_secpolicy_rename(zfs_cmd_t *zc, cred_t *cr)
480 {
481 return (zfs_secpolicy_rename_perms(zc->zc_name, zc->zc_value, cr));
482 }
483
484 static int
485 zfs_secpolicy_promote(zfs_cmd_t *zc, cred_t *cr)
486 {
487 char parentname[MAXNAMELEN];
488 objset_t *clone;
489 int error;
490
491 error = zfs_secpolicy_write_perms(zc->zc_name,
492 ZFS_DELEG_PERM_PROMOTE, cr);
493 if (error)
494 return (error);
495
496 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY,
497 DS_MODE_STANDARD | DS_MODE_READONLY, &clone);
498
499 if (error == 0) {
500 dsl_dataset_t *pclone = NULL;
501 dsl_dir_t *dd;
502 dd = clone->os->os_dsl_dataset->ds_dir;
503
504 rw_enter(&dd->dd_pool->dp_config_rwlock, RW_READER);
505 error = dsl_dataset_open_obj(dd->dd_pool,
506 dd->dd_phys->dd_origin_obj, NULL,
507 DS_MODE_NONE, FTAG, &pclone);
508 rw_exit(&dd->dd_pool->dp_config_rwlock);
509 if (error) {
510 dmu_objset_close(clone);
511 return (error);
512 }
513
514 error = zfs_secpolicy_write_perms(zc->zc_name,
515 ZFS_DELEG_PERM_MOUNT, cr);
516
517 dsl_dataset_name(pclone, parentname);
518 dmu_objset_close(clone);
519 dsl_dataset_close(pclone, DS_MODE_NONE, FTAG);
520 if (error == 0)
521 error = zfs_secpolicy_write_perms(parentname,
522 ZFS_DELEG_PERM_PROMOTE, cr);
523 }
524 return (error);
525 }
526
527 static int
528 zfs_secpolicy_receive(zfs_cmd_t *zc, cred_t *cr)
529 {
530 int error;
531
532 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
533 ZFS_DELEG_PERM_RECEIVE, cr)) != 0)
534 return (error);
535
536 if ((error = zfs_secpolicy_write_perms(zc->zc_name,
537 ZFS_DELEG_PERM_MOUNT, cr)) != 0)
538 return (error);
539
540 return (zfs_secpolicy_write_perms(zc->zc_name,
541 ZFS_DELEG_PERM_CREATE, cr));
542 }
543
544 int
545 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
546 {
547 int error;
548
549 if ((error = zfs_secpolicy_write_perms(name,
550 ZFS_DELEG_PERM_SNAPSHOT, cr)) != 0)
551 return (error);
552
553 error = zfs_secpolicy_write_perms(name,
554 ZFS_DELEG_PERM_MOUNT, cr);
555
556 return (error);
557 }
558
559 static int
560 zfs_secpolicy_snapshot(zfs_cmd_t *zc, cred_t *cr)
561 {
562
563 return (zfs_secpolicy_snapshot_perms(zc->zc_name, cr));
564 }
565
566 static int
567 zfs_secpolicy_create(zfs_cmd_t *zc, cred_t *cr)
568 {
569 char parentname[MAXNAMELEN];
570 int error;
571
572 if ((error = zfs_get_parent(zc->zc_name, parentname,
573 sizeof (parentname))) != 0)
574 return (error);
575
576 if (zc->zc_value[0] != '\0') {
577 if ((error = zfs_secpolicy_write_perms(zc->zc_value,
578 ZFS_DELEG_PERM_CLONE, cr)) != 0)
579 return (error);
580 }
581
582 if ((error = zfs_secpolicy_write_perms(parentname,
583 ZFS_DELEG_PERM_CREATE, cr)) != 0)
584 return (error);
585
586 error = zfs_secpolicy_write_perms(parentname,
587 ZFS_DELEG_PERM_MOUNT, cr);
588
589 return (error);
590 }
591
592 static int
593 zfs_secpolicy_umount(zfs_cmd_t *zc, cred_t *cr)
594 {
595 int error;
596
597 error = secpolicy_fs_unmount(cr, NULL);
598 if (error) {
599 error = dsl_deleg_access(zc->zc_name, ZFS_DELEG_PERM_MOUNT, cr);
600 }
601 return (error);
602 }
603
604 /*
605 * Policy for pool operations - create/destroy pools, add vdevs, etc. Requires
606 * SYS_CONFIG privilege, which is not available in a local zone.
607 */
608 /* ARGSUSED */
609 static int
610 zfs_secpolicy_config(zfs_cmd_t *zc, cred_t *cr)
611 {
612 if (secpolicy_sys_config(cr, B_FALSE) != 0)
613 return (EPERM);
614
615 return (0);
616 }
617
618 /*
619 * Just like zfs_secpolicy_config, except that we will check for
620 * mount permission on the dataset for permission to create/remove
621 * the minor nodes.
622 */
623 static int
624 zfs_secpolicy_minor(zfs_cmd_t *zc, cred_t *cr)
625 {
626 if (secpolicy_sys_config(cr, B_FALSE) != 0) {
627 return (dsl_deleg_access(zc->zc_name,
628 ZFS_DELEG_PERM_MOUNT, cr));
629 }
630
631 return (0);
632 }
633
634 /*
635 * Policy for fault injection. Requires all privileges.
636 */
637 /* ARGSUSED */
638 static int
639 zfs_secpolicy_inject(zfs_cmd_t *zc, cred_t *cr)
640 {
641 return (secpolicy_zinject(cr));
642 }
643
644 static int
645 zfs_secpolicy_inherit(zfs_cmd_t *zc, cred_t *cr)
646 {
647 zfs_prop_t prop = zfs_name_to_prop(zc->zc_value);
648
649 if (prop == ZPROP_INVAL) {
650 if (!zfs_prop_user(zc->zc_value))
651 return (EINVAL);
652 return (zfs_secpolicy_write_perms(zc->zc_name,
653 ZFS_DELEG_PERM_USERPROP, cr));
654 } else {
655 if (!zfs_prop_inheritable(prop))
656 return (EINVAL);
657 return (zfs_secpolicy_setprop(zc->zc_name, prop, cr));
658 }
659 }
660
661 /*
662 * Returns the nvlist as specified by the user in the zfs_cmd_t.
663 */
664 static int
665 get_nvlist(uint64_t nvl, uint64_t size, nvlist_t **nvp)
666 {
667 char *packed;
668 int error;
669 nvlist_t *list = NULL;
670
671 /*
672 * Read in and unpack the user-supplied nvlist.
673 */
674 if (size == 0)
675 return (EINVAL);
676
677 packed = kmem_alloc(size, KM_SLEEP);
678
679 if ((error = xcopyin((void *)(uintptr_t)nvl, packed, size)) != 0) {
680 kmem_free(packed, size);
681 return (error);
682 }
683
684 if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {
685 kmem_free(packed, size);
686 return (error);
687 }
688
689 kmem_free(packed, size);
690
691 *nvp = list;
692 return (0);
693 }
694
695 static int
696 put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
697 {
698 char *packed = NULL;
699 size_t size;
700 int error;
701
702 VERIFY(nvlist_size(nvl, &size, NV_ENCODE_NATIVE) == 0);
703
704 if (size > zc->zc_nvlist_dst_size) {
705 error = ENOMEM;
706 } else {
707 packed = kmem_alloc(size, KM_SLEEP);
708 VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE,
709 KM_SLEEP) == 0);
710 error = xcopyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
711 size);
712 kmem_free(packed, size);
713 }
714
715 zc->zc_nvlist_dst_size = size;
716 return (error);
717 }
718
719 static int
720 zfs_ioc_pool_create(zfs_cmd_t *zc)
721 {
722 int error;
723 nvlist_t *config, *props = NULL;
724 char *buf;
725
726 if (error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
727 &config))
728 return (error);
729
730 if (zc->zc_nvlist_src_size != 0 && (error =
731 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, &props))) {
732 nvlist_free(config);
733 return (error);
734 }
735
736 buf = history_str_get(zc);
737
738 error = spa_create(zc->zc_name, config, props, buf);
739
740 if (buf != NULL)
741 history_str_free(buf);
742
743 nvlist_free(config);
744
745 if (props)
746 nvlist_free(props);
747
748 return (error);
749 }
750
751 static int
752 zfs_ioc_pool_destroy(zfs_cmd_t *zc)
753 {
754 int error;
755 zfs_log_history(zc);
756 error = spa_destroy(zc->zc_name);
757 return (error);
758 }
759
760 static int
761 zfs_ioc_pool_import(zfs_cmd_t *zc)
762 {
763 int error;
764 nvlist_t *config, *props = NULL;
765 uint64_t guid;
766
767 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
768 &config)) != 0)
769 return (error);
770
771 if (zc->zc_nvlist_src_size != 0 && (error =
772 get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size, &props))) {
773 nvlist_free(config);
774 return (error);
775 }
776
777 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &guid) != 0 ||
778 guid != zc->zc_guid)
779 error = EINVAL;
780 else
781 error = spa_import(zc->zc_name, config, props);
782
783 nvlist_free(config);
784
785 if (props)
786 nvlist_free(props);
787
788 return (error);
789 }
790
791 static int
792 zfs_ioc_pool_export(zfs_cmd_t *zc)
793 {
794 int error;
795 zfs_log_history(zc);
796 error = spa_export(zc->zc_name, NULL);
797 return (error);
798 }
799
800 static int
801 zfs_ioc_pool_configs(zfs_cmd_t *zc)
802 {
803 nvlist_t *configs;
804 int error;
805
806 if ((configs = spa_all_configs(&zc->zc_cookie)) == NULL)
807 return (EEXIST);
808
809 error = put_nvlist(zc, configs);
810
811 nvlist_free(configs);
812
813 return (error);
814 }
815
816 static int
817 zfs_ioc_pool_stats(zfs_cmd_t *zc)
818 {
819 nvlist_t *config;
820 int error;
821 int ret = 0;
822
823 error = spa_get_stats(zc->zc_name, &config, zc->zc_value,
824 sizeof (zc->zc_value));
825
826 if (config != NULL) {
827 ret = put_nvlist(zc, config);
828 nvlist_free(config);
829
830 /*
831 * The config may be present even if 'error' is non-zero.
832 * In this case we return success, and preserve the real errno
833 * in 'zc_cookie'.
834 */
835 zc->zc_cookie = error;
836 } else {
837 ret = error;
838 }
839
840 return (ret);
841 }
842
843 /*
844 * Try to import the given pool, returning pool stats as appropriate so that
845 * user land knows which devices are available and overall pool health.
846 */
847 static int
848 zfs_ioc_pool_tryimport(zfs_cmd_t *zc)
849 {
850 nvlist_t *tryconfig, *config;
851 int error;
852
853 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
854 &tryconfig)) != 0)
855 return (error);
856
857 config = spa_tryimport(tryconfig);
858
859 nvlist_free(tryconfig);
860
861 if (config == NULL)
862 return (EINVAL);
863
864 error = put_nvlist(zc, config);
865 nvlist_free(config);
866
867 return (error);
868 }
869
870 static int
871 zfs_ioc_pool_scrub(zfs_cmd_t *zc)
872 {
873 spa_t *spa;
874 int error;
875
876 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
877 return (error);
878
879 mutex_enter(&spa_namespace_lock);
880 error = spa_scrub(spa, zc->zc_cookie, B_FALSE);
881 mutex_exit(&spa_namespace_lock);
882
883 spa_close(spa, FTAG);
884
885 return (error);
886 }
887
888 static int
889 zfs_ioc_pool_freeze(zfs_cmd_t *zc)
890 {
891 spa_t *spa;
892 int error;
893
894 error = spa_open(zc->zc_name, &spa, FTAG);
895 if (error == 0) {
896 spa_freeze(spa);
897 spa_close(spa, FTAG);
898 }
899 return (error);
900 }
901
902 static int
903 zfs_ioc_pool_upgrade(zfs_cmd_t *zc)
904 {
905 spa_t *spa;
906 int error;
907
908 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
909 return (error);
910
911 if (zc->zc_cookie < spa_version(spa) || zc->zc_cookie > SPA_VERSION) {
912 spa_close(spa, FTAG);
913 return (EINVAL);
914 }
915
916 spa_upgrade(spa, zc->zc_cookie);
917 spa_close(spa, FTAG);
918
919 return (error);
920 }
921
922 static int
923 zfs_ioc_pool_get_history(zfs_cmd_t *zc)
924 {
925 spa_t *spa;
926 char *hist_buf;
927 uint64_t size;
928 int error;
929
930 if ((size = zc->zc_history_len) == 0)
931 return (EINVAL);
932
933 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
934 return (error);
935
936 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY) {
937 spa_close(spa, FTAG);
938 return (ENOTSUP);
939 }
940
941 hist_buf = kmem_alloc(size, KM_SLEEP);
942 if ((error = spa_history_get(spa, &zc->zc_history_offset,
943 &zc->zc_history_len, hist_buf)) == 0) {
944 error = xcopyout(hist_buf,
945 (char *)(uintptr_t)zc->zc_history,
946 zc->zc_history_len);
947 }
948
949 spa_close(spa, FTAG);
950 kmem_free(hist_buf, size);
951 return (error);
952 }
953
954 static int
955 zfs_ioc_dsobj_to_dsname(zfs_cmd_t *zc)
956 {
957 int error;
958
959 if (error = dsl_dsobj_to_dsname(zc->zc_name, zc->zc_obj, zc->zc_value))
960 return (error);
961
962 return (0);
963 }
964
965 static int
966 zfs_ioc_obj_to_path(zfs_cmd_t *zc)
967 {
968 objset_t *osp;
969 int error;
970
971 if ((error = dmu_objset_open(zc->zc_name, DMU_OST_ZFS,
972 DS_MODE_NONE | DS_MODE_READONLY, &osp)) != 0)
973 return (error);
974
975 error = zfs_obj_to_path(osp, zc->zc_obj, zc->zc_value,
976 sizeof (zc->zc_value));
977 dmu_objset_close(osp);
978
979 return (error);
980 }
981
982 static int
983 zfs_ioc_vdev_add(zfs_cmd_t *zc)
984 {
985 spa_t *spa;
986 int error;
987 nvlist_t *config, **l2cache, **spares;
988 uint_t nl2cache = 0, nspares = 0;
989
990 error = spa_open(zc->zc_name, &spa, FTAG);
991 if (error != 0)
992 return (error);
993
994 error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
995 &config);
996 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_L2CACHE,
997 &l2cache, &nl2cache);
998
999 (void) nvlist_lookup_nvlist_array(config, ZPOOL_CONFIG_SPARES,
1000 &spares, &nspares);
1001
1002 /*
1003 * A root pool with concatenated devices is not supported.
1004 * Thus, can not add a device to a root pool.
1005 *
1006 * Intent log device can not be added to a rootpool because
1007 * during mountroot, zil is replayed, a seperated log device
1008 * can not be accessed during the mountroot time.
1009 *
1010 * l2cache and spare devices are ok to be added to a rootpool.
1011 */
1012 if (spa->spa_bootfs != 0 && nl2cache == 0 && nspares == 0) {
1013 spa_close(spa, FTAG);
1014 return (EDOM);
1015 }
1016
1017 if (error == 0) {
1018 error = spa_vdev_add(spa, config);
1019 nvlist_free(config);
1020 }
1021 spa_close(spa, FTAG);
1022 return (error);
1023 }
1024
1025 static int
1026 zfs_ioc_vdev_remove(zfs_cmd_t *zc)
1027 {
1028 spa_t *spa;
1029 int error;
1030
1031 error = spa_open(zc->zc_name, &spa, FTAG);
1032 if (error != 0)
1033 return (error);
1034 error = spa_vdev_remove(spa, zc->zc_guid, B_FALSE);
1035 spa_close(spa, FTAG);
1036 return (error);
1037 }
1038
1039 static int
1040 zfs_ioc_vdev_set_state(zfs_cmd_t *zc)
1041 {
1042 spa_t *spa;
1043 int error;
1044 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
1045
1046 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1047 return (error);
1048 switch (zc->zc_cookie) {
1049 case VDEV_STATE_ONLINE:
1050 error = vdev_online(spa, zc->zc_guid, zc->zc_obj, &newstate);
1051 break;
1052
1053 case VDEV_STATE_OFFLINE:
1054 error = vdev_offline(spa, zc->zc_guid, zc->zc_obj);
1055 break;
1056
1057 case VDEV_STATE_FAULTED:
1058 error = vdev_fault(spa, zc->zc_guid);
1059 break;
1060
1061 case VDEV_STATE_DEGRADED:
1062 error = vdev_degrade(spa, zc->zc_guid);
1063 break;
1064
1065 default:
1066 error = EINVAL;
1067 }
1068 zc->zc_cookie = newstate;
1069 spa_close(spa, FTAG);
1070 return (error);
1071 }
1072
1073 static int
1074 zfs_ioc_vdev_attach(zfs_cmd_t *zc)
1075 {
1076 spa_t *spa;
1077 int replacing = zc->zc_cookie;
1078 nvlist_t *config;
1079 int error;
1080
1081 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1082 return (error);
1083
1084 if ((error = get_nvlist(zc->zc_nvlist_conf, zc->zc_nvlist_conf_size,
1085 &config)) == 0) {
1086 error = spa_vdev_attach(spa, zc->zc_guid, config, replacing);
1087 nvlist_free(config);
1088 }
1089
1090 spa_close(spa, FTAG);
1091 return (error);
1092 }
1093
1094 static int
1095 zfs_ioc_vdev_detach(zfs_cmd_t *zc)
1096 {
1097 spa_t *spa;
1098 int error;
1099
1100 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1101 return (error);
1102
1103 error = spa_vdev_detach(spa, zc->zc_guid, B_FALSE);
1104
1105 spa_close(spa, FTAG);
1106 return (error);
1107 }
1108
1109 static int
1110 zfs_ioc_vdev_setpath(zfs_cmd_t *zc)
1111 {
1112 spa_t *spa;
1113 char *path = zc->zc_value;
1114 uint64_t guid = zc->zc_guid;
1115 int error;
1116
1117 error = spa_open(zc->zc_name, &spa, FTAG);
1118 if (error != 0)
1119 return (error);
1120
1121 error = spa_vdev_setpath(spa, guid, path);
1122 spa_close(spa, FTAG);
1123 return (error);
1124 }
1125
1126 static int
1127 zfs_os_open_retry(char *name, objset_t **os)
1128 {
1129 int error;
1130
1131 retry:
1132 error = dmu_objset_open(name, DMU_OST_ANY,
1133 DS_MODE_STANDARD | DS_MODE_READONLY, os);
1134 if (error != 0) {
1135 /*
1136 * This is ugly: dmu_objset_open() can return EBUSY if
1137 * the objset is held exclusively. Fortunately this hold is
1138 * only for a short while, so we retry here.
1139 * This avoids user code having to handle EBUSY,
1140 * for example for a "zfs list".
1141 */
1142 if (error == EBUSY) {
1143 delay(1);
1144 goto retry;
1145 }
1146 }
1147 return (error);
1148 }
1149
1150 /*
1151 * inputs:
1152 * zc_name name of filesystem
1153 * zc_nvlist_dst_size size of buffer for property nvlist
1154 *
1155 * outputs:
1156 * zc_objset_stats stats
1157 * zc_nvlist_dst property nvlist
1158 * zc_nvlist_dst_size size of property nvlist
1159 * zc_value alternate root
1160 */
1161 static int
1162 zfs_ioc_objset_stats(zfs_cmd_t *zc)
1163 {
1164 objset_t *os = NULL;
1165 int error;
1166 nvlist_t *nv;
1167
1168 if ((error = zfs_os_open_retry(zc->zc_name, &os)) != 0)
1169 return (error);
1170
1171 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1172
1173 if (zc->zc_nvlist_dst != 0 &&
1174 (error = dsl_prop_get_all(os, &nv)) == 0) {
1175 dmu_objset_stats(os, nv);
1176 /*
1177 * NB: zvol_get_stats() will read the objset contents,
1178 * which we aren't supposed to do with a
1179 * DS_MODE_STANDARD open, because it could be
1180 * inconsistent. So this is a bit of a workaround...
1181 */
1182 if (!zc->zc_objset_stats.dds_inconsistent) {
1183 if (dmu_objset_type(os) == DMU_OST_ZVOL)
1184 VERIFY(zvol_get_stats(os, nv) == 0);
1185 }
1186 error = put_nvlist(zc, nv);
1187 nvlist_free(nv);
1188 }
1189
1190 spa_altroot(dmu_objset_spa(os), zc->zc_value, sizeof (zc->zc_value));
1191
1192 dmu_objset_close(os);
1193 return (error);
1194 }
1195
1196 static int
1197 nvl_add_zplprop(objset_t *os, nvlist_t *props, zfs_prop_t prop)
1198 {
1199 uint64_t value;
1200 int error;
1201
1202 /*
1203 * zfs_get_zplprop() will either find a value or give us
1204 * the default value (if there is one).
1205 */
1206 if ((error = zfs_get_zplprop(os, prop, &value)) != 0)
1207 return (error);
1208 VERIFY(nvlist_add_uint64(props, zfs_prop_to_name(prop), value) == 0);
1209 return (0);
1210 }
1211
1212 /*
1213 * inputs:
1214 * zc_name name of filesystem
1215 * zc_nvlist_dst_size size of buffer for zpl property nvlist
1216 *
1217 * outputs:
1218 * zc_nvlist_dst zpl property nvlist
1219 * zc_nvlist_dst_size size of zpl property nvlist
1220 */
1221 static int
1222 zfs_ioc_objset_zplprops(zfs_cmd_t *zc)
1223 {
1224 objset_t *os;
1225 int err;
1226
1227 if ((err = zfs_os_open_retry(zc->zc_name, &os)) != 0)
1228 return (err);
1229
1230 dmu_objset_fast_stat(os, &zc->zc_objset_stats);
1231
1232 /*
1233 * NB: nvl_add_zplprop() will read the objset contents,
1234 * which we aren't supposed to do with a DS_MODE_STANDARD
1235 * open, because it could be inconsistent.
1236 */
1237 if (zc->zc_nvlist_dst != NULL &&
1238 !zc->zc_objset_stats.dds_inconsistent &&
1239 dmu_objset_type(os) == DMU_OST_ZFS) {
1240 nvlist_t *nv;
1241
1242 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1243 if ((err = nvl_add_zplprop(os, nv, ZFS_PROP_VERSION)) == 0 &&
1244 (err = nvl_add_zplprop(os, nv, ZFS_PROP_NORMALIZE)) == 0 &&
1245 (err = nvl_add_zplprop(os, nv, ZFS_PROP_UTF8ONLY)) == 0 &&
1246 (err = nvl_add_zplprop(os, nv, ZFS_PROP_CASE)) == 0)
1247 err = put_nvlist(zc, nv);
1248 nvlist_free(nv);
1249 } else {
1250 err = ENOENT;
1251 }
1252 dmu_objset_close(os);
1253 return (err);
1254 }
1255
1256 /*
1257 * inputs:
1258 * zc_name name of filesystem
1259 * zc_cookie zap cursor
1260 * zc_nvlist_dst_size size of buffer for property nvlist
1261 *
1262 * outputs:
1263 * zc_name name of next filesystem
1264 * zc_objset_stats stats
1265 * zc_nvlist_dst property nvlist
1266 * zc_nvlist_dst_size size of property nvlist
1267 * zc_value alternate root
1268 */
1269 static int
1270 zfs_ioc_dataset_list_next(zfs_cmd_t *zc)
1271 {
1272 objset_t *os;
1273 int error;
1274 char *p;
1275
1276 if ((error = zfs_os_open_retry(zc->zc_name, &os)) != 0) {
1277 if (error == ENOENT)
1278 error = ESRCH;
1279 return (error);
1280 }
1281
1282 p = strrchr(zc->zc_name, '/');
1283 if (p == NULL || p[1] != '\0')
1284 (void) strlcat(zc->zc_name, "/", sizeof (zc->zc_name));
1285 p = zc->zc_name + strlen(zc->zc_name);
1286
1287 do {
1288 error = dmu_dir_list_next(os,
1289 sizeof (zc->zc_name) - (p - zc->zc_name), p,
1290 NULL, &zc->zc_cookie);
1291 if (error == ENOENT)
1292 error = ESRCH;
1293 } while (error == 0 && !INGLOBALZONE(curproc) &&
1294 !zone_dataset_visible(zc->zc_name, NULL));
1295
1296 /*
1297 * If it's a hidden dataset (ie. with a '$' in its name), don't
1298 * try to get stats for it. Userland will skip over it.
1299 */
1300 if (error == 0 && strchr(zc->zc_name, '$') == NULL)
1301 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
1302
1303 dmu_objset_close(os);
1304 return (error);
1305 }
1306
1307 /*
1308 * inputs:
1309 * zc_name name of filesystem
1310 * zc_cookie zap cursor
1311 * zc_nvlist_dst_size size of buffer for property nvlist
1312 *
1313 * outputs:
1314 * zc_name name of next snapshot
1315 * zc_objset_stats stats
1316 * zc_nvlist_dst property nvlist
1317 * zc_nvlist_dst_size size of property nvlist
1318 * zc_value alternate root
1319 */
1320 static int
1321 zfs_ioc_snapshot_list_next(zfs_cmd_t *zc)
1322 {
1323 objset_t *os;
1324 int error;
1325
1326 if ((error = zfs_os_open_retry(zc->zc_name, &os)) != 0) {
1327 if (error == ENOENT)
1328 error = ESRCH;
1329 return (error);
1330 }
1331
1332 /*
1333 * A dataset name of maximum length cannot have any snapshots,
1334 * so exit immediately.
1335 */
1336 if (strlcat(zc->zc_name, "@", sizeof (zc->zc_name)) >= MAXNAMELEN) {
1337 dmu_objset_close(os);
1338 return (ESRCH);
1339 }
1340
1341 error = dmu_snapshot_list_next(os,
1342 sizeof (zc->zc_name) - strlen(zc->zc_name),
1343 zc->zc_name + strlen(zc->zc_name), NULL, &zc->zc_cookie, NULL);
1344 if (error == ENOENT)
1345 error = ESRCH;
1346
1347 if (error == 0)
1348 error = zfs_ioc_objset_stats(zc); /* fill in the stats */
1349
1350 /* if we failed, undo the @ that we tacked on to zc_name */
1351 if (error != 0)
1352 *strchr(zc->zc_name, '@') = '\0';
1353
1354 dmu_objset_close(os);
1355 return (error);
1356 }
1357
1358 int
1359 zfs_set_prop_nvlist(const char *name, nvlist_t *nvl)
1360 {
1361 nvpair_t *elem;
1362 int error;
1363 uint64_t intval;
1364 char *strval;
1365
1366 /*
1367 * First validate permission to set all of the properties
1368 */
1369 elem = NULL;
1370 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
1371 const char *propname = nvpair_name(elem);
1372 zfs_prop_t prop = zfs_name_to_prop(propname);
1373
1374 if (prop == ZPROP_INVAL) {
1375 /*
1376 * If this is a user-defined property, it must be a
1377 * string, and there is no further validation to do.
1378 */
1379 if (!zfs_prop_user(propname) ||
1380 nvpair_type(elem) != DATA_TYPE_STRING)
1381 return (EINVAL);
1382
1383 if (error = zfs_secpolicy_write_perms(name,
1384 ZFS_DELEG_PERM_USERPROP, CRED()))
1385 return (error);
1386 continue;
1387 }
1388
1389 if ((error = zfs_secpolicy_setprop(name, prop, CRED())) != 0)
1390 return (error);
1391
1392 /*
1393 * Check that this value is valid for this pool version
1394 */
1395 switch (prop) {
1396 case ZFS_PROP_COMPRESSION:
1397 /*
1398 * If the user specified gzip compression, make sure
1399 * the SPA supports it. We ignore any errors here since
1400 * we'll catch them later.
1401 */
1402 if (nvpair_type(elem) == DATA_TYPE_UINT64 &&
1403 nvpair_value_uint64(elem, &intval) == 0 &&
1404 intval >= ZIO_COMPRESS_GZIP_1 &&
1405 intval <= ZIO_COMPRESS_GZIP_9) {
1406 if (zfs_check_version(name,
1407 SPA_VERSION_GZIP_COMPRESSION))
1408 return (ENOTSUP);
1409 }
1410 break;
1411
1412 case ZFS_PROP_COPIES:
1413 if (zfs_check_version(name, SPA_VERSION_DITTO_BLOCKS))
1414 return (ENOTSUP);
1415 break;
1416
1417 case ZFS_PROP_SHARESMB:
1418 if (zpl_check_version(name, ZPL_VERSION_FUID))
1419 return (ENOTSUP);
1420 break;
1421 }
1422 if ((error = zfs_secpolicy_setprop(name, prop, CRED())) != 0)
1423 return (error);
1424 }
1425
1426 elem = NULL;
1427 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
1428 const char *propname = nvpair_name(elem);
1429 zfs_prop_t prop = zfs_name_to_prop(propname);
1430
1431 if (prop == ZPROP_INVAL) {
1432 VERIFY(nvpair_value_string(elem, &strval) == 0);
1433 error = dsl_prop_set(name, propname, 1,
1434 strlen(strval) + 1, strval);
1435 if (error == 0)
1436 continue;
1437 else
1438 return (error);
1439 }
1440
1441 switch (prop) {
1442 case ZFS_PROP_QUOTA:
1443 if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
1444 (error = dsl_dir_set_quota(name, intval)) != 0)
1445 return (error);
1446 break;
1447
1448 case ZFS_PROP_REFQUOTA:
1449 if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
1450 (error = dsl_dataset_set_quota(name, intval)) != 0)
1451 return (error);
1452 break;
1453
1454 case ZFS_PROP_RESERVATION:
1455 if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
1456 (error = dsl_dir_set_reservation(name,
1457 intval)) != 0)
1458 return (error);
1459 break;
1460
1461 case ZFS_PROP_REFRESERVATION:
1462 if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
1463 (error = dsl_dataset_set_reservation(name,
1464 intval)) != 0)
1465 return (error);
1466 break;
1467
1468 case ZFS_PROP_VOLSIZE:
1469 if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
1470 (error = zvol_set_volsize(name,
1471 ddi_driver_major(zfs_dip), intval)) != 0)
1472 return (error);
1473 break;
1474
1475 case ZFS_PROP_VOLBLOCKSIZE:
1476 if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
1477 (error = zvol_set_volblocksize(name, intval)) != 0)
1478 return (error);
1479 break;
1480
1481 case ZFS_PROP_VERSION:
1482 if ((error = nvpair_value_uint64(elem, &intval)) != 0 ||
1483 (error = zfs_set_version(name, intval)) != 0)
1484 return (error);
1485 break;
1486
1487 default:
1488 if (nvpair_type(elem) == DATA_TYPE_STRING) {
1489 if (zfs_prop_get_type(prop) !=
1490 PROP_TYPE_STRING)
1491 return (EINVAL);
1492 VERIFY(nvpair_value_string(elem, &strval) == 0);
1493 if ((error = dsl_prop_set(name,
1494 nvpair_name(elem), 1, strlen(strval) + 1,
1495 strval)) != 0)
1496 return (error);
1497 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) {
1498 const char *unused;
1499
1500 VERIFY(nvpair_value_uint64(elem, &intval) == 0);
1501
1502 switch (zfs_prop_get_type(prop)) {
1503 case PROP_TYPE_NUMBER:
1504 break;
1505 case PROP_TYPE_STRING:
1506 return (EINVAL);
1507 case PROP_TYPE_INDEX:
1508 if (zfs_prop_index_to_string(prop,
1509 intval, &unused) != 0)
1510 return (EINVAL);
1511 break;
1512 default:
1513 cmn_err(CE_PANIC,
1514 "unknown property type");
1515 break;
1516 }
1517
1518 if ((error = dsl_prop_set(name, propname,
1519 8, 1, &intval)) != 0)
1520 return (error);
1521 } else {
1522 return (EINVAL);
1523 }
1524 break;
1525 }
1526 }
1527
1528 return (0);
1529 }
1530
1531 /*
1532 * inputs:
1533 * zc_name name of filesystem
1534 * zc_value name of property to inherit
1535 * zc_nvlist_src{_size} nvlist of properties to apply
1536 *
1537 * outputs: none
1538 */
1539 static int
1540 zfs_ioc_set_prop(zfs_cmd_t *zc)
1541 {
1542 nvlist_t *nvl;
1543 int error;
1544
1545 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1546 &nvl)) != 0)
1547 return (error);
1548
1549 error = zfs_set_prop_nvlist(zc->zc_name, nvl);
1550
1551 nvlist_free(nvl);
1552 return (error);
1553 }
1554
1555 /*
1556 * inputs:
1557 * zc_name name of filesystem
1558 * zc_value name of property to inherit
1559 *
1560 * outputs: none
1561 */
1562 static int
1563 zfs_ioc_inherit_prop(zfs_cmd_t *zc)
1564 {
1565 /* the property name has been validated by zfs_secpolicy_inherit() */
1566 return (dsl_prop_set(zc->zc_name, zc->zc_value, 0, 0, NULL));
1567 }
1568
1569 static int
1570 zfs_ioc_pool_set_props(zfs_cmd_t *zc)
1571 {
1572 nvlist_t *props;
1573 spa_t *spa;
1574 int error;
1575
1576 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1577 &props)))
1578 return (error);
1579
1580 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0) {
1581 nvlist_free(props);
1582 return (error);
1583 }
1584
1585 error = spa_prop_set(spa, props);
1586
1587 nvlist_free(props);
1588 spa_close(spa, FTAG);
1589
1590 return (error);
1591 }
1592
1593 static int
1594 zfs_ioc_pool_get_props(zfs_cmd_t *zc)
1595 {
1596 spa_t *spa;
1597 int error;
1598 nvlist_t *nvp = NULL;
1599
1600 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
1601 return (error);
1602
1603 error = spa_prop_get(spa, &nvp);
1604
1605 if (error == 0 && zc->zc_nvlist_dst != NULL)
1606 error = put_nvlist(zc, nvp);
1607 else
1608 error = EFAULT;
1609
1610 spa_close(spa, FTAG);
1611
1612 if (nvp)
1613 nvlist_free(nvp);
1614 return (error);
1615 }
1616
1617 static int
1618 zfs_ioc_iscsi_perm_check(zfs_cmd_t *zc)
1619 {
1620 nvlist_t *nvp;
1621 int error;
1622 uint32_t uid;
1623 uint32_t gid;
1624 uint32_t *groups;
1625 uint_t group_cnt;
1626 cred_t *usercred;
1627
1628 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1629 &nvp)) != 0) {
1630 return (error);
1631 }
1632
1633 if ((error = nvlist_lookup_uint32(nvp,
1634 ZFS_DELEG_PERM_UID, &uid)) != 0) {
1635 nvlist_free(nvp);
1636 return (EPERM);
1637 }
1638
1639 if ((error = nvlist_lookup_uint32(nvp,
1640 ZFS_DELEG_PERM_GID, &gid)) != 0) {
1641 nvlist_free(nvp);
1642 return (EPERM);
1643 }
1644
1645 if ((error = nvlist_lookup_uint32_array(nvp, ZFS_DELEG_PERM_GROUPS,
1646 &groups, &group_cnt)) != 0) {
1647 nvlist_free(nvp);
1648 return (EPERM);
1649 }
1650 usercred = cralloc();
1651 if ((crsetugid(usercred, uid, gid) != 0) ||
1652 (crsetgroups(usercred, group_cnt, (gid_t *)groups) != 0)) {
1653 nvlist_free(nvp);
1654 crfree(usercred);
1655 return (EPERM);
1656 }
1657 nvlist_free(nvp);
1658 error = dsl_deleg_access(zc->zc_name,
1659 zfs_prop_to_name(ZFS_PROP_SHAREISCSI), usercred);
1660 crfree(usercred);
1661 return (error);
1662 }
1663
1664 /*
1665 * inputs:
1666 * zc_name name of filesystem
1667 * zc_nvlist_src{_size} nvlist of delegated permissions
1668 * zc_perm_action allow/unallow flag
1669 *
1670 * outputs: none
1671 */
1672 static int
1673 zfs_ioc_set_fsacl(zfs_cmd_t *zc)
1674 {
1675 int error;
1676 nvlist_t *fsaclnv = NULL;
1677
1678 if ((error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1679 &fsaclnv)) != 0)
1680 return (error);
1681
1682 /*
1683 * Verify nvlist is constructed correctly
1684 */
1685 if ((error = zfs_deleg_verify_nvlist(fsaclnv)) != 0) {
1686 nvlist_free(fsaclnv);
1687 return (EINVAL);
1688 }
1689
1690 /*
1691 * If we don't have PRIV_SYS_MOUNT, then validate
1692 * that user is allowed to hand out each permission in
1693 * the nvlist(s)
1694 */
1695
1696 error = secpolicy_zfs(CRED());
1697 if (error) {
1698 if (zc->zc_perm_action == B_FALSE) {
1699 error = dsl_deleg_can_allow(zc->zc_name,
1700 fsaclnv, CRED());
1701 } else {
1702 error = dsl_deleg_can_unallow(zc->zc_name,
1703 fsaclnv, CRED());
1704 }
1705 }
1706
1707 if (error == 0)
1708 error = dsl_deleg_set(zc->zc_name, fsaclnv, zc->zc_perm_action);
1709
1710 nvlist_free(fsaclnv);
1711 return (error);
1712 }
1713
1714 /*
1715 * inputs:
1716 * zc_name name of filesystem
1717 *
1718 * outputs:
1719 * zc_nvlist_src{_size} nvlist of delegated permissions
1720 */
1721 static int
1722 zfs_ioc_get_fsacl(zfs_cmd_t *zc)
1723 {
1724 nvlist_t *nvp;
1725 int error;
1726
1727 if ((error = dsl_deleg_get(zc->zc_name, &nvp)) == 0) {
1728 error = put_nvlist(zc, nvp);
1729 nvlist_free(nvp);
1730 }
1731
1732 return (error);
1733 }
1734
1735 /*
1736 * inputs:
1737 * zc_name name of volume
1738 *
1739 * outputs: none
1740 */
1741 static int
1742 zfs_ioc_create_minor(zfs_cmd_t *zc)
1743 {
1744 return (zvol_create_minor(zc->zc_name, ddi_driver_major(zfs_dip)));
1745 }
1746
1747 /*
1748 * inputs:
1749 * zc_name name of volume
1750 *
1751 * outputs: none
1752 */
1753 static int
1754 zfs_ioc_remove_minor(zfs_cmd_t *zc)
1755 {
1756 return (zvol_remove_minor(zc->zc_name));
1757 }
1758
1759 /*
1760 * Search the vfs list for a specified resource. Returns a pointer to it
1761 * or NULL if no suitable entry is found. The caller of this routine
1762 * is responsible for releasing the returned vfs pointer.
1763 */
1764 static vfs_t *
1765 zfs_get_vfs(const char *resource)
1766 {
1767 struct vfs *vfsp;
1768 struct vfs *vfs_found = NULL;
1769
1770 vfs_list_read_lock();
1771 vfsp = rootvfs;
1772 do {
1773 if (strcmp(refstr_value(vfsp->vfs_resource), resource) == 0) {
1774 VFS_HOLD(vfsp);
1775 vfs_found = vfsp;
1776 break;
1777 }
1778 vfsp = vfsp->vfs_next;
1779 } while (vfsp != rootvfs);
1780 vfs_list_unlock();
1781 return (vfs_found);
1782 }
1783
1784 /* ARGSUSED */
1785 static void
1786 zfs_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
1787 {
1788 zfs_creat_t *zct = arg;
1789
1790 zfs_create_fs(os, cr, zct->zct_zplprops, tx);
1791 }
1792
1793 #define ZFS_PROP_UNDEFINED ((uint64_t)-1)
1794
1795 /*
1796 * inputs:
1797 * createprops list of properties requested by creator
1798 * dataset name of dataset we are creating
1799 *
1800 * outputs:
1801 * zplprops values for the zplprops we attach to the master node object
1802 *
1803 * Determine the settings for utf8only, normalization and
1804 * casesensitivity. Specific values may have been requested by the
1805 * creator and/or we can inherit values from the parent dataset. If
1806 * the file system is of too early a vintage, a creator can not
1807 * request settings for these properties, even if the requested
1808 * setting is the default value. We don't actually want to create dsl
1809 * properties for these, so remove them from the source nvlist after
1810 * processing.
1811 */
1812 static int
1813 zfs_fill_zplprops(const char *dataset, nvlist_t *createprops,
1814 nvlist_t *zplprops, uint64_t zplver, boolean_t *is_ci)
1815 {
1816 objset_t *os;
1817 char parentname[MAXNAMELEN];
1818 char *cp;
1819 uint64_t sense = ZFS_PROP_UNDEFINED;
1820 uint64_t norm = ZFS_PROP_UNDEFINED;
1821 uint64_t u8 = ZFS_PROP_UNDEFINED;
1822 int error = 0;
1823
1824 ASSERT(zplprops != NULL);
1825
1826 (void) strlcpy(parentname, dataset, sizeof (parentname));
1827 cp = strrchr(parentname, '/');
1828 ASSERT(cp != NULL);
1829 cp[0] = '\0';
1830
1831 /*
1832 * Pull out creator prop choices, if any.
1833 */
1834 if (createprops) {
1835 (void) nvlist_lookup_uint64(createprops,
1836 zfs_prop_to_name(ZFS_PROP_NORMALIZE), &norm);
1837 (void) nvlist_remove_all(createprops,
1838 zfs_prop_to_name(ZFS_PROP_NORMALIZE));
1839 (void) nvlist_lookup_uint64(createprops,
1840 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), &u8);
1841 (void) nvlist_remove_all(createprops,
1842 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1843 (void) nvlist_lookup_uint64(createprops,
1844 zfs_prop_to_name(ZFS_PROP_CASE), &sense);
1845 (void) nvlist_remove_all(createprops,
1846 zfs_prop_to_name(ZFS_PROP_CASE));
1847 }
1848
1849 /*
1850 * If the file system or pool is version is too "young" to
1851 * support normalization and the creator tried to set a value
1852 * for one of the props, error out. We only need check the
1853 * ZPL version because we've already checked by now that the
1854 * SPA version is compatible with the selected ZPL version.
1855 */
1856 if (zplver < ZPL_VERSION_NORMALIZATION &&
1857 (norm != ZFS_PROP_UNDEFINED || u8 != ZFS_PROP_UNDEFINED ||
1858 sense != ZFS_PROP_UNDEFINED))
1859 return (ENOTSUP);
1860
1861 /*
1862 * Put the version in the zplprops
1863 */
1864 VERIFY(nvlist_add_uint64(zplprops,
1865 zfs_prop_to_name(ZFS_PROP_VERSION), zplver) == 0);
1866
1867 /*
1868 * Open parent object set so we can inherit zplprop values if
1869 * necessary.
1870 */
1871 if ((error = zfs_os_open_retry(parentname, &os)) != 0)
1872 return (error);
1873
1874 if (norm == ZFS_PROP_UNDEFINED)
1875 VERIFY(zfs_get_zplprop(os, ZFS_PROP_NORMALIZE, &norm) == 0);
1876 VERIFY(nvlist_add_uint64(zplprops,
1877 zfs_prop_to_name(ZFS_PROP_NORMALIZE), norm) == 0);
1878
1879 /*
1880 * If we're normalizing, names must always be valid UTF-8 strings.
1881 */
1882 if (norm)
1883 u8 = 1;
1884 if (u8 == ZFS_PROP_UNDEFINED)
1885 VERIFY(zfs_get_zplprop(os, ZFS_PROP_UTF8ONLY, &u8) == 0);
1886 VERIFY(nvlist_add_uint64(zplprops,
1887 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), u8) == 0);
1888
1889 if (sense == ZFS_PROP_UNDEFINED)
1890 VERIFY(zfs_get_zplprop(os, ZFS_PROP_CASE, &sense) == 0);
1891 VERIFY(nvlist_add_uint64(zplprops,
1892 zfs_prop_to_name(ZFS_PROP_CASE), sense) == 0);
1893
1894 if (is_ci)
1895 *is_ci = (sense == ZFS_CASE_INSENSITIVE);
1896
1897 dmu_objset_close(os);
1898 return (0);
1899 }
1900
1901 /*
1902 * inputs:
1903 * zc_objset_type type of objset to create (fs vs zvol)
1904 * zc_name name of new objset
1905 * zc_value name of snapshot to clone from (may be empty)
1906 * zc_nvlist_src{_size} nvlist of properties to apply
1907 *
1908 * outputs: none
1909 */
1910 static int
1911 zfs_ioc_create(zfs_cmd_t *zc)
1912 {
1913 objset_t *clone;
1914 int error = 0;
1915 zfs_creat_t zct;
1916 nvlist_t *nvprops = NULL;
1917 void (*cbfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
1918 dmu_objset_type_t type = zc->zc_objset_type;
1919
1920 switch (type) {
1921
1922 case DMU_OST_ZFS:
1923 cbfunc = zfs_create_cb;
1924 break;
1925
1926 case DMU_OST_ZVOL:
1927 cbfunc = zvol_create_cb;
1928 break;
1929
1930 default:
1931 cbfunc = NULL;
1932 break;
1933 }
1934 if (strchr(zc->zc_name, '@') ||
1935 strchr(zc->zc_name, '%'))
1936 return (EINVAL);
1937
1938 if (zc->zc_nvlist_src != NULL &&
1939 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
1940 &nvprops)) != 0)
1941 return (error);
1942
1943 zct.zct_zplprops = NULL;
1944 zct.zct_props = nvprops;
1945
1946 if (zc->zc_value[0] != '\0') {
1947 /*
1948 * We're creating a clone of an existing snapshot.
1949 */
1950 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
1951 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0) {
1952 nvlist_free(nvprops);
1953 return (EINVAL);
1954 }
1955
1956 error = dmu_objset_open(zc->zc_value, type,
1957 DS_MODE_STANDARD | DS_MODE_READONLY, &clone);
1958 if (error) {
1959 nvlist_free(nvprops);
1960 return (error);
1961 }
1962
1963 error = dmu_objset_create(zc->zc_name, type, clone, 0,
1964 NULL, NULL);
1965 if (error) {
1966 dmu_objset_close(clone);
1967 nvlist_free(nvprops);
1968 return (error);
1969 }
1970 dmu_objset_close(clone);
1971 } else {
1972 boolean_t is_insensitive = B_FALSE;
1973
1974 if (cbfunc == NULL) {
1975 nvlist_free(nvprops);
1976 return (EINVAL);
1977 }
1978
1979 if (type == DMU_OST_ZVOL) {
1980 uint64_t volsize, volblocksize;
1981
1982 if (nvprops == NULL ||
1983 nvlist_lookup_uint64(nvprops,
1984 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1985 &volsize) != 0) {
1986 nvlist_free(nvprops);
1987 return (EINVAL);
1988 }
1989
1990 if ((error = nvlist_lookup_uint64(nvprops,
1991 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1992 &volblocksize)) != 0 && error != ENOENT) {
1993 nvlist_free(nvprops);
1994 return (EINVAL);
1995 }
1996
1997 if (error != 0)
1998 volblocksize = zfs_prop_default_numeric(
1999 ZFS_PROP_VOLBLOCKSIZE);
2000
2001 if ((error = zvol_check_volblocksize(
2002 volblocksize)) != 0 ||
2003 (error = zvol_check_volsize(volsize,
2004 volblocksize)) != 0) {
2005 nvlist_free(nvprops);
2006 return (error);
2007 }
2008 } else if (type == DMU_OST_ZFS) {
2009 uint64_t version;
2010 int error;
2011
2012 /*
2013 * Default ZPL version to non-FUID capable if the
2014 * pool is not upgraded to support FUIDs.
2015 */
2016 if (zfs_check_version(zc->zc_name, SPA_VERSION_FUID))
2017 version = ZPL_VERSION_FUID - 1;
2018 else
2019 version = ZPL_VERSION;
2020
2021 /*
2022 * Potentially override default ZPL version based
2023 * on creator's request.
2024 */
2025 (void) nvlist_lookup_uint64(nvprops,
2026 zfs_prop_to_name(ZFS_PROP_VERSION), &version);
2027
2028 /*
2029 * Make sure version we ended up with is kosher
2030 */
2031 if ((version < ZPL_VERSION_INITIAL ||
2032 version > ZPL_VERSION) ||
2033 (version >= ZPL_VERSION_FUID &&
2034 zfs_check_version(zc->zc_name, SPA_VERSION_FUID))) {
2035 nvlist_free(nvprops);
2036 return (ENOTSUP);
2037 }
2038
2039 /*
2040 * We have to have normalization and
2041 * case-folding flags correct when we do the
2042 * file system creation, so go figure them out
2043 * now.
2044 */
2045 VERIFY(nvlist_alloc(&zct.zct_zplprops,
2046 NV_UNIQUE_NAME, KM_SLEEP) == 0);
2047 error = zfs_fill_zplprops(zc->zc_name, nvprops,
2048 zct.zct_zplprops, version, &is_insensitive);
2049 if (error != 0) {
2050 nvlist_free(nvprops);
2051 nvlist_free(zct.zct_zplprops);
2052 return (error);
2053 }
2054 }
2055 error = dmu_objset_create(zc->zc_name, type, NULL,
2056 is_insensitive ? DS_FLAG_CI_DATASET : 0, cbfunc, &zct);
2057 nvlist_free(zct.zct_zplprops);
2058 }
2059
2060 /*
2061 * It would be nice to do this atomically.
2062 */
2063 if (error == 0) {
2064 if ((error = zfs_set_prop_nvlist(zc->zc_name, nvprops)) != 0)
2065 (void) dmu_objset_destroy(zc->zc_name);
2066 }
2067 nvlist_free(nvprops);
2068 return (error);
2069 }
2070
2071 /*
2072 * inputs:
2073 * zc_name name of filesystem
2074 * zc_value short name of snapshot
2075 * zc_cookie recursive flag
2076 *
2077 * outputs: none
2078 */
2079 static int
2080 zfs_ioc_snapshot(zfs_cmd_t *zc)
2081 {
2082 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
2083 return (EINVAL);
2084 return (dmu_objset_snapshot(zc->zc_name,
2085 zc->zc_value, zc->zc_cookie));
2086 }
2087
2088 int
2089 zfs_unmount_snap(char *name, void *arg)
2090 {
2091 char *snapname = arg;
2092 char *cp;
2093 vfs_t *vfsp = NULL;
2094
2095 /*
2096 * Snapshots (which are under .zfs control) must be unmounted
2097 * before they can be destroyed.
2098 */
2099
2100 if (snapname) {
2101 (void) strcat(name, "@");
2102 (void) strcat(name, snapname);
2103 vfsp = zfs_get_vfs(name);
2104 cp = strchr(name, '@');
2105 *cp = '\0';
2106 } else if (strchr(name, '@')) {
2107 vfsp = zfs_get_vfs(name);
2108 }
2109
2110 if (vfsp) {
2111 /*
2112 * Always force the unmount for snapshots.
2113 */
2114 int flag = MS_FORCE;
2115 int err;
2116
2117 if ((err = vn_vfswlock(vfsp->vfs_vnodecovered)) != 0) {
2118 VFS_RELE(vfsp);
2119 return (err);
2120 }
2121 VFS_RELE(vfsp);
2122 if ((err = dounmount(vfsp, flag, kcred)) != 0)
2123 return (err);
2124 }
2125 return (0);
2126 }
2127
2128 /*
2129 * inputs:
2130 * zc_name name of filesystem
2131 * zc_value short name of snapshot
2132 *
2133 * outputs: none
2134 */
2135 static int
2136 zfs_ioc_destroy_snaps(zfs_cmd_t *zc)
2137 {
2138 int err;
2139
2140 if (snapshot_namecheck(zc->zc_value, NULL, NULL) != 0)
2141 return (EINVAL);
2142 err = dmu_objset_find(zc->zc_name,
2143 zfs_unmount_snap, zc->zc_value, DS_FIND_CHILDREN);
2144 if (err)
2145 return (err);
2146 return (dmu_snapshots_destroy(zc->zc_name, zc->zc_value));
2147 }
2148
2149 /*
2150 * inputs:
2151 * zc_name name of dataset to destroy
2152 * zc_objset_type type of objset
2153 *
2154 * outputs: none
2155 */
2156 static int
2157 zfs_ioc_destroy(zfs_cmd_t *zc)
2158 {
2159 if (strchr(zc->zc_name, '@') && zc->zc_objset_type == DMU_OST_ZFS) {
2160 int err = zfs_unmount_snap(zc->zc_name, NULL);
2161 if (err)
2162 return (err);
2163 }
2164
2165 return (dmu_objset_destroy(zc->zc_name));
2166 }
2167
2168 /*
2169 * inputs:
2170 * zc_name name of dataset to rollback (to most recent snapshot)
2171 *
2172 * outputs: none
2173 */
2174 static int
2175 zfs_ioc_rollback(zfs_cmd_t *zc)
2176 {
2177 objset_t *os;
2178 int error;
2179 zfsvfs_t *zfsvfs = NULL;
2180
2181 /*
2182 * Get the zfsvfs for the receiving objset. There
2183 * won't be one if we're operating on a zvol, if the
2184 * objset doesn't exist yet, or is not mounted.
2185 */
2186 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY,
2187 DS_MODE_STANDARD, &os);
2188 if (error)
2189 return (error);
2190
2191 if (dmu_objset_type(os) == DMU_OST_ZFS) {
2192 mutex_enter(&os->os->os_user_ptr_lock);
2193 zfsvfs = dmu_objset_get_user(os);
2194 if (zfsvfs != NULL)
2195 VFS_HOLD(zfsvfs->z_vfs);
2196 mutex_exit(&os->os->os_user_ptr_lock);
2197 }
2198
2199 if (zfsvfs != NULL) {
2200 char osname[MAXNAMELEN];
2201 int mode;
2202
2203 error = zfs_suspend_fs(zfsvfs, osname, &mode);
2204 if (error == 0) {
2205 int resume_err;
2206
2207 ASSERT(strcmp(osname, zc->zc_name) == 0);
2208 error = dmu_objset_rollback(os);
2209 resume_err = zfs_resume_fs(zfsvfs, osname, mode);
2210 error = error ? error : resume_err;
2211 } else {
2212 dmu_objset_close(os);
2213 }
2214 VFS_RELE(zfsvfs->z_vfs);
2215 } else {
2216 error = dmu_objset_rollback(os);
2217 }
2218 /* Note, the dmu_objset_rollback() closes the objset for us. */
2219
2220 return (error);
2221 }
2222
2223 /*
2224 * inputs:
2225 * zc_name old name of dataset
2226 * zc_value new name of dataset
2227 * zc_cookie recursive flag (only valid for snapshots)
2228 *
2229 * outputs: none
2230 */
2231 static int
2232 zfs_ioc_rename(zfs_cmd_t *zc)
2233 {
2234 boolean_t recursive = zc->zc_cookie & 1;
2235
2236 zc->zc_value[sizeof (zc->zc_value) - 1] = '\0';
2237 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
2238 strchr(zc->zc_value, '%'))
2239 return (EINVAL);
2240
2241 /*
2242 * Unmount snapshot unless we're doing a recursive rename,
2243 * in which case the dataset code figures out which snapshots
2244 * to unmount.
2245 */
2246 if (!recursive && strchr(zc->zc_name, '@') != NULL &&
2247 zc->zc_objset_type == DMU_OST_ZFS) {
2248 int err = zfs_unmount_snap(zc->zc_name, NULL);
2249 if (err)
2250 return (err);
2251 }
2252
2253 return (dmu_objset_rename(zc->zc_name, zc->zc_value, recursive));
2254 }
2255
2256 /*
2257 * inputs:
2258 * zc_name name of containing filesystem
2259 * zc_nvlist_src{_size} nvlist of properties to apply
2260 * zc_value name of snapshot to create
2261 * zc_string name of clone origin (if DRR_FLAG_CLONE)
2262 * zc_cookie file descriptor to recv from
2263 * zc_begin_record the BEGIN record of the stream (not byteswapped)
2264 * zc_guid force flag
2265 *
2266 * outputs:
2267 * zc_cookie number of bytes read
2268 */
2269 static int
2270 zfs_ioc_recv(zfs_cmd_t *zc)
2271 {
2272 file_t *fp;
2273 objset_t *os;
2274 dmu_recv_cookie_t drc;
2275 zfsvfs_t *zfsvfs = NULL;
2276 boolean_t force = (boolean_t)zc->zc_guid;
2277 int error, fd;
2278 offset_t off;
2279 nvlist_t *props = NULL;
2280 objset_t *origin = NULL;
2281 char *tosnap;
2282 char tofs[ZFS_MAXNAMELEN];
2283
2284 if (dataset_namecheck(zc->zc_value, NULL, NULL) != 0 ||
2285 strchr(zc->zc_value, '@') == NULL ||
2286 strchr(zc->zc_value, '%'))
2287 return (EINVAL);
2288
2289 (void) strcpy(tofs, zc->zc_value);
2290 tosnap = strchr(tofs, '@');
2291 *tosnap = '\0';
2292 tosnap++;
2293
2294 if (zc->zc_nvlist_src != NULL &&
2295 (error = get_nvlist(zc->zc_nvlist_src, zc->zc_nvlist_src_size,
2296 &props)) != 0)
2297 return (error);
2298
2299 fd = zc->zc_cookie;
2300 fp = getf(fd);
2301 if (fp == NULL) {
2302 nvlist_free(props);
2303 return (EBADF);
2304 }
2305
2306 /*
2307 * Get the zfsvfs for the receiving objset. There
2308 * won't be one if we're operating on a zvol, if the
2309 * objset doesn't exist yet, or is not mounted.
2310 */
2311
2312 error = dmu_objset_open(tofs, DMU_OST_ZFS,
2313 DS_MODE_STANDARD | DS_MODE_READONLY, &os);
2314 if (!error) {
2315 mutex_enter(&os->os->os_user_ptr_lock);
2316 zfsvfs = dmu_objset_get_user(os);
2317 if (zfsvfs != NULL) {
2318 VFS_HOLD(zfsvfs->z_vfs);
2319 mutex_exit(&os->os->os_user_ptr_lock);
2320 if (!mutex_tryenter(&zfsvfs->z_online_recv_lock)) {
2321 VFS_RELE(zfsvfs->z_vfs);
2322 dmu_objset_close(os);
2323 nvlist_free(props);
2324 releasef(fd);
2325 return (EBUSY);
2326 }
2327 } else {
2328 mutex_exit(&os->os->os_user_ptr_lock);
2329 }
2330 dmu_objset_close(os);
2331 }
2332
2333 if (zc->zc_string[0]) {
2334 error = dmu_objset_open(zc->zc_string, DMU_OST_ANY,
2335 DS_MODE_STANDARD | DS_MODE_READONLY, &origin);
2336 if (error) {
2337 if (zfsvfs != NULL) {
2338 mutex_exit(&zfsvfs->z_online_recv_lock);
2339 VFS_RELE(zfsvfs->z_vfs);
2340 }
2341 nvlist_free(props);
2342 releasef(fd);
2343 return (error);
2344 }
2345 }
2346
2347 error = dmu_recv_begin(tofs, tosnap, &zc->zc_begin_record,
2348 force, origin, zfsvfs != NULL, &drc);
2349 if (origin)
2350 dmu_objset_close(origin);
2351 if (error) {
2352 if (zfsvfs != NULL) {
2353 mutex_exit(&zfsvfs->z_online_recv_lock);
2354 VFS_RELE(zfsvfs->z_vfs);
2355 }
2356 nvlist_free(props);
2357 releasef(fd);
2358 return (error);
2359 }
2360
2361 /*
2362 * If properties are supplied, they are to completely replace
2363 * the existing ones; "inherit" any existing properties.
2364 */
2365 if (props) {
2366 objset_t *os;
2367 nvlist_t *nv = NULL;
2368
2369 error = dmu_objset_open(tofs, DMU_OST_ANY,
2370 DS_MODE_STANDARD | DS_MODE_READONLY | DS_MODE_INCONSISTENT,
2371 &os);
2372 if (error == 0) {
2373 error = dsl_prop_get_all(os, &nv);
2374 dmu_objset_close(os);
2375 }
2376 if (error == 0) {
2377 nvpair_t *elem;
2378 zfs_cmd_t *zc2;
2379 zc2 = kmem_alloc(sizeof (zfs_cmd_t), KM_SLEEP);
2380
2381 (void) strcpy(zc2->zc_name, tofs);
2382 for (elem = nvlist_next_nvpair(nv, NULL); elem;
2383 elem = nvlist_next_nvpair(nv, elem)) {
2384 (void) strcpy(zc2->zc_value, nvpair_name(elem));
2385 if (zfs_secpolicy_inherit(zc2, CRED()) == 0)
2386 (void) zfs_ioc_inherit_prop(zc2);
2387 }
2388 kmem_free(zc2, sizeof (zfs_cmd_t));
2389 }
2390 if (nv)
2391 nvlist_free(nv);
2392 }
2393
2394 /*
2395 * Set properties. Note, we ignore errors. Would be better to
2396 * do best-effort in zfs_set_prop_nvlist, too.
2397 */
2398 (void) zfs_set_prop_nvlist(tofs, props);
2399 nvlist_free(props);
2400
2401 off = fp->f_offset;
2402 error = dmu_recv_stream(&drc, fp->f_vnode, &off);
2403
2404 if (error == 0) {
2405 if (zfsvfs != NULL) {
2406 char osname[MAXNAMELEN];
2407 int mode;
2408
2409 error = zfs_suspend_fs(zfsvfs, osname, &mode);
2410 if (error == 0) {
2411 int resume_err;
2412
2413 error = dmu_recv_end(&drc);
2414 resume_err = zfs_resume_fs(zfsvfs,
2415 osname, mode);
2416 error = error ? error : resume_err;
2417 } else {
2418 dmu_recv_abort_cleanup(&drc);
2419 }
2420 } else {
2421 error = dmu_recv_end(&drc);
2422 }
2423 }
2424 if (zfsvfs != NULL) {
2425 mutex_exit(&zfsvfs->z_online_recv_lock);
2426 VFS_RELE(zfsvfs->z_vfs);
2427 }
2428
2429 zc->zc_cookie = off - fp->f_offset;
2430 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
2431 fp->f_offset = off;
2432
2433 releasef(fd);
2434 return (error);
2435 }
2436
2437 /*
2438 * inputs:
2439 * zc_name name of snapshot to send
2440 * zc_value short name of incremental fromsnap (may be empty)
2441 * zc_cookie file descriptor to send stream to
2442 * zc_obj fromorigin flag (mutually exclusive with zc_value)
2443 *
2444 * outputs: none
2445 */
2446 static int
2447 zfs_ioc_send(zfs_cmd_t *zc)
2448 {
2449 objset_t *fromsnap = NULL;
2450 objset_t *tosnap;
2451 file_t *fp;
2452 int error;
2453 offset_t off;
2454
2455 error = dmu_objset_open(zc->zc_name, DMU_OST_ANY,
2456 DS_MODE_STANDARD | DS_MODE_READONLY, &tosnap);
2457 if (error)
2458 return (error);
2459
2460 if (zc->zc_value[0] != '\0') {
2461 char buf[MAXPATHLEN];
2462 char *cp;
2463
2464 (void) strncpy(buf, zc->zc_name, sizeof (buf));
2465 cp = strchr(buf, '@');
2466 if (cp)
2467 *(cp+1) = 0;
2468 (void) strncat(buf, zc->zc_value, sizeof (buf));
2469 error = dmu_objset_open(buf, DMU_OST_ANY,
2470 DS_MODE_STANDARD | DS_MODE_READONLY, &fromsnap);
2471 if (error) {
2472 dmu_objset_close(tosnap);
2473 return (error);
2474 }
2475 }
2476
2477 fp = getf(zc->zc_cookie);
2478 if (fp == NULL) {
2479 dmu_objset_close(tosnap);
2480 if (fromsnap)
2481 dmu_objset_close(fromsnap);
2482 return (EBADF);
2483 }
2484
2485 off = fp->f_offset;
2486 error = dmu_sendbackup(tosnap, fromsnap, zc->zc_obj, fp->f_vnode, &off);
2487
2488 if (VOP_SEEK(fp->f_vnode, fp->f_offset, &off, NULL) == 0)
2489 fp->f_offset = off;
2490 releasef(zc->zc_cookie);
2491 if (fromsnap)
2492 dmu_objset_close(fromsnap);
2493 dmu_objset_close(tosnap);
2494 return (error);
2495 }
2496
2497 static int
2498 zfs_ioc_inject_fault(zfs_cmd_t *zc)
2499 {
2500 int id, error;
2501
2502 error = zio_inject_fault(zc->zc_name, (int)zc->zc_guid, &id,
2503 &zc->zc_inject_record);
2504
2505 if (error == 0)
2506 zc->zc_guid = (uint64_t)id;
2507
2508 return (error);
2509 }
2510
2511 static int
2512 zfs_ioc_clear_fault(zfs_cmd_t *zc)
2513 {
2514 return (zio_clear_fault((int)zc->zc_guid));
2515 }
2516
2517 static int
2518 zfs_ioc_inject_list_next(zfs_cmd_t *zc)
2519 {
2520 int id = (int)zc->zc_guid;
2521 int error;
2522
2523 error = zio_inject_list_next(&id, zc->zc_name, sizeof (zc->zc_name),
2524 &zc->zc_inject_record);
2525
2526 zc->zc_guid = id;
2527
2528 return (error);
2529 }
2530
2531 static int
2532 zfs_ioc_error_log(zfs_cmd_t *zc)
2533 {
2534 spa_t *spa;
2535 int error;
2536 size_t count = (size_t)zc->zc_nvlist_dst_size;
2537
2538 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
2539 return (error);
2540
2541 error = spa_get_errlog(spa, (void *)(uintptr_t)zc->zc_nvlist_dst,
2542 &count);
2543 if (error == 0)
2544 zc->zc_nvlist_dst_size = count;
2545 else
2546 zc->zc_nvlist_dst_size = spa_get_errlog_size(spa);
2547
2548 spa_close(spa, FTAG);
2549
2550 return (error);
2551 }
2552
2553 static int
2554 zfs_ioc_clear(zfs_cmd_t *zc)
2555 {
2556 spa_t *spa;
2557 vdev_t *vd;
2558 uint64_t txg;
2559 int error;
2560
2561 if ((error = spa_open(zc->zc_name, &spa, FTAG)) != 0)
2562 return (error);
2563
2564 /*
2565 * Try to resume any I/Os which may have been suspended
2566 * as a result of a complete pool failure.
2567 */
2568 if (!list_is_empty(&spa->spa_zio_list)) {
2569 if (zio_vdev_resume_io(spa) != 0) {
2570 spa_close(spa, FTAG);
2571 return (EIO);
2572 }
2573 }
2574
2575 txg = spa_vdev_enter(spa);
2576
2577 if (zc->zc_guid == 0) {
2578 vd = NULL;
2579 } else if ((vd = spa_lookup_by_guid(spa, zc->zc_guid)) == NULL) {
2580 spa_aux_vdev_t *sav;
2581 int i;
2582
2583 /*
2584 * Check if this is an l2cache device.
2585 */
2586 ASSERT(spa != NULL);
2587 sav = &spa->spa_l2cache;
2588 for (i = 0; i < sav->sav_count; i++) {
2589 if (sav->sav_vdevs[i]->vdev_guid == zc->zc_guid) {
2590 vd = sav->sav_vdevs[i];
2591 break;
2592 }
2593 }
2594
2595 if (vd == NULL) {
2596 (void) spa_vdev_exit(spa, NULL, txg, ENODEV);
2597 spa_close(spa, FTAG);
2598 return (ENODEV);
2599 }
2600 }
2601
2602 vdev_clear(spa, vd, B_TRUE);
2603
2604 (void) spa_vdev_exit(spa, NULL, txg, 0);
2605
2606 spa_close(spa, FTAG);
2607
2608 return (0);
2609 }
2610
2611 /*
2612 * inputs:
2613 * zc_name name of filesystem
2614 * zc_value name of origin snapshot
2615 *
2616 * outputs: none
2617 */
2618 static int
2619 zfs_ioc_promote(zfs_cmd_t *zc)
2620 {
2621 char *cp;
2622
2623 /*
2624 * We don't need to unmount *all* the origin fs's snapshots, but
2625 * it's easier.
2626 */
2627 cp = strchr(zc->zc_value, '@');
2628 if (cp)
2629 *cp = '\0';
2630 (void) dmu_objset_find(zc->zc_value,
2631 zfs_unmount_snap, NULL, DS_FIND_SNAPSHOTS);
2632 return (dsl_dataset_promote(zc->zc_name));
2633 }
2634
2635 /*
2636 * We don't want to have a hard dependency
2637 * against some special symbols in sharefs
2638 * nfs, and smbsrv. Determine them if needed when
2639 * the first file system is shared.
2640 * Neither sharefs, nfs or smbsrv are unloadable modules.
2641 */
2642 int (*znfsexport_fs)(void *arg);
2643 int (*zshare_fs)(enum sharefs_sys_op, share_t *, uint32_t);
2644 int (*zsmbexport_fs)(void *arg, boolean_t add_share);
2645
2646 int zfs_nfsshare_inited;
2647 int zfs_smbshare_inited;
2648
2649 ddi_modhandle_t nfs_mod;
2650 ddi_modhandle_t sharefs_mod;
2651 ddi_modhandle_t smbsrv_mod;
2652 kmutex_t zfs_share_lock;
2653
2654 static int
2655 zfs_init_sharefs()
2656 {
2657 int error;
2658
2659 ASSERT(MUTEX_HELD(&zfs_share_lock));
2660 /* Both NFS and SMB shares also require sharetab support. */
2661 if (sharefs_mod == NULL && ((sharefs_mod =
2662 ddi_modopen("fs/sharefs",
2663 KRTLD_MODE_FIRST, &error)) == NULL)) {
2664 return (ENOSYS);
2665 }
2666 if (zshare_fs == NULL && ((zshare_fs =
2667 (int (*)(enum sharefs_sys_op, share_t *, uint32_t))
2668 ddi_modsym(sharefs_mod, "sharefs_impl", &error)) == NULL)) {
2669 return (ENOSYS);
2670 }
2671 return (0);
2672 }
2673
2674 static int
2675 zfs_ioc_share(zfs_cmd_t *zc)
2676 {
2677 int error;
2678 int opcode;
2679
2680 switch (zc->zc_share.z_sharetype) {
2681 case ZFS_SHARE_NFS:
2682 case ZFS_UNSHARE_NFS:
2683 if (zfs_nfsshare_inited == 0) {
2684 mutex_enter(&zfs_share_lock);
2685 if (nfs_mod == NULL && ((nfs_mod = ddi_modopen("fs/nfs",
2686 KRTLD_MODE_FIRST, &error)) == NULL)) {
2687 mutex_exit(&zfs_share_lock);
2688 return (ENOSYS);
2689 }
2690 if (znfsexport_fs == NULL &&
2691 ((znfsexport_fs = (int (*)(void *))
2692 ddi_modsym(nfs_mod,
2693 "nfs_export", &error)) == NULL)) {
2694 mutex_exit(&zfs_share_lock);
2695 return (ENOSYS);
2696 }
2697 error = zfs_init_sharefs();
2698 if (error) {
2699 mutex_exit(&zfs_share_lock);
2700 return (ENOSYS);
2701 }
2702 zfs_nfsshare_inited = 1;
2703 mutex_exit(&zfs_share_lock);
2704 }
2705 break;
2706 case ZFS_SHARE_SMB:
2707 case ZFS_UNSHARE_SMB:
2708 if (zfs_smbshare_inited == 0) {
2709 mutex_enter(&zfs_share_lock);
2710 if (smbsrv_mod == NULL && ((smbsrv_mod =
2711 ddi_modopen("drv/smbsrv",
2712 KRTLD_MODE_FIRST, &error)) == NULL)) {
2713 mutex_exit(&zfs_share_lock);
2714 return (ENOSYS);
2715 }
2716 if (zsmbexport_fs == NULL && ((zsmbexport_fs =
2717 (int (*)(void *, boolean_t))ddi_modsym(smbsrv_mod,
2718 "smb_server_share", &error)) == NULL)) {
2719 mutex_exit(&zfs_share_lock);
2720 return (ENOSYS);
2721 }
2722 error = zfs_init_sharefs();
2723 if (error) {
2724 mutex_exit(&zfs_share_lock);
2725 return (ENOSYS);
2726 }
2727 zfs_smbshare_inited = 1;
2728 mutex_exit(&zfs_share_lock);
2729 }
2730 break;
2731 default:
2732 return (EINVAL);
2733 }
2734
2735 switch (zc->zc_share.z_sharetype) {
2736 case ZFS_SHARE_NFS:
2737 case ZFS_UNSHARE_NFS:
2738 if (error =
2739 znfsexport_fs((void *)
2740 (uintptr_t)zc->zc_share.z_exportdata))
2741 return (error);
2742 break;
2743 case ZFS_SHARE_SMB:
2744 case ZFS_UNSHARE_SMB:
2745 if (error = zsmbexport_fs((void *)
2746 (uintptr_t)zc->zc_share.z_exportdata,
2747 zc->zc_share.z_sharetype == ZFS_SHARE_SMB ?
2748 B_TRUE : B_FALSE)) {
2749 return (error);
2750 }
2751 break;
2752 }
2753
2754 opcode = (zc->zc_share.z_sharetype == ZFS_SHARE_NFS ||
2755 zc->zc_share.z_sharetype == ZFS_SHARE_SMB) ?
2756 SHAREFS_ADD : SHAREFS_REMOVE;
2757
2758 /*
2759 * Add or remove share from sharetab
2760 */
2761 error = zshare_fs(opcode,
2762 (void *)(uintptr_t)zc->zc_share.z_sharedata,
2763 zc->zc_share.z_sharemax);
2764
2765 return (error);
2766
2767 }
2768
2769 /*
2770 * pool create, destroy, and export don't log the history as part of
2771 * zfsdev_ioctl, but rather zfs_ioc_pool_create, and zfs_ioc_pool_export
2772 * do the logging of those commands.
2773 */
2774 static zfs_ioc_vec_t zfs_ioc_vec[] = {
2775 { zfs_ioc_pool_create, zfs_secpolicy_config, POOL_NAME, B_FALSE },
2776 { zfs_ioc_pool_destroy, zfs_secpolicy_config, POOL_NAME, B_FALSE },
2777 { zfs_ioc_pool_import, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2778 { zfs_ioc_pool_export, zfs_secpolicy_config, POOL_NAME, B_FALSE },
2779 { zfs_ioc_pool_configs, zfs_secpolicy_none, NO_NAME, B_FALSE },
2780 { zfs_ioc_pool_stats, zfs_secpolicy_read, POOL_NAME, B_FALSE },
2781 { zfs_ioc_pool_tryimport, zfs_secpolicy_config, NO_NAME, B_FALSE },
2782 { zfs_ioc_pool_scrub, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2783 { zfs_ioc_pool_freeze, zfs_secpolicy_config, NO_NAME, B_FALSE },
2784 { zfs_ioc_pool_upgrade, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2785 { zfs_ioc_pool_get_history, zfs_secpolicy_config, POOL_NAME, B_FALSE },
2786 { zfs_ioc_vdev_add, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2787 { zfs_ioc_vdev_remove, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2788 { zfs_ioc_vdev_set_state, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2789 { zfs_ioc_vdev_attach, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2790 { zfs_ioc_vdev_detach, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2791 { zfs_ioc_vdev_setpath, zfs_secpolicy_config, POOL_NAME, B_FALSE },
2792 { zfs_ioc_objset_stats, zfs_secpolicy_read, DATASET_NAME, B_FALSE },
2793 { zfs_ioc_objset_zplprops, zfs_secpolicy_read, DATASET_NAME, B_FALSE },
2794 { zfs_ioc_dataset_list_next, zfs_secpolicy_read,
2795 DATASET_NAME, B_FALSE },
2796 { zfs_ioc_snapshot_list_next, zfs_secpolicy_read,
2797 DATASET_NAME, B_FALSE },
2798 { zfs_ioc_set_prop, zfs_secpolicy_none, DATASET_NAME, B_TRUE },
2799 { zfs_ioc_create_minor, zfs_secpolicy_minor, DATASET_NAME, B_FALSE },
2800 { zfs_ioc_remove_minor, zfs_secpolicy_minor, DATASET_NAME, B_FALSE },
2801 { zfs_ioc_create, zfs_secpolicy_create, DATASET_NAME, B_TRUE },
2802 { zfs_ioc_destroy, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE },
2803 { zfs_ioc_rollback, zfs_secpolicy_rollback, DATASET_NAME, B_TRUE },
2804 { zfs_ioc_rename, zfs_secpolicy_rename, DATASET_NAME, B_TRUE },
2805 { zfs_ioc_recv, zfs_secpolicy_receive, DATASET_NAME, B_TRUE },
2806 { zfs_ioc_send, zfs_secpolicy_send, DATASET_NAME, B_TRUE },
2807 { zfs_ioc_inject_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE },
2808 { zfs_ioc_clear_fault, zfs_secpolicy_inject, NO_NAME, B_FALSE },
2809 { zfs_ioc_inject_list_next, zfs_secpolicy_inject, NO_NAME, B_FALSE },
2810 { zfs_ioc_error_log, zfs_secpolicy_inject, POOL_NAME, B_FALSE },
2811 { zfs_ioc_clear, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2812 { zfs_ioc_promote, zfs_secpolicy_promote, DATASET_NAME, B_TRUE },
2813 { zfs_ioc_destroy_snaps, zfs_secpolicy_destroy, DATASET_NAME, B_TRUE },
2814 { zfs_ioc_snapshot, zfs_secpolicy_snapshot, DATASET_NAME, B_TRUE },
2815 { zfs_ioc_dsobj_to_dsname, zfs_secpolicy_config, POOL_NAME, B_FALSE },
2816 { zfs_ioc_obj_to_path, zfs_secpolicy_config, NO_NAME, B_FALSE },
2817 { zfs_ioc_pool_set_props, zfs_secpolicy_config, POOL_NAME, B_TRUE },
2818 { zfs_ioc_pool_get_props, zfs_secpolicy_read, POOL_NAME, B_FALSE },
2819 { zfs_ioc_set_fsacl, zfs_secpolicy_fsacl, DATASET_NAME, B_TRUE },
2820 { zfs_ioc_get_fsacl, zfs_secpolicy_read, DATASET_NAME, B_FALSE },
2821 { zfs_ioc_iscsi_perm_check, zfs_secpolicy_iscsi,
2822 DATASET_NAME, B_FALSE },
2823 { zfs_ioc_share, zfs_secpolicy_share, DATASET_NAME, B_FALSE },
2824 { zfs_ioc_inherit_prop, zfs_secpolicy_inherit, DATASET_NAME, B_TRUE },
2825 };
2826
2827 static int
2828 zfsdev_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr, int *rvalp)
2829 {
2830 zfs_cmd_t *zc;
2831 uint_t vec;
2832 int error, rc;
2833
2834 if (getminor(dev) != 0)
2835 return (zvol_ioctl(dev, cmd, arg, flag, cr, rvalp));
2836
2837 vec = cmd - ZFS_IOC;
2838 ASSERT3U(getmajor(dev), ==, ddi_driver_major(zfs_dip));
2839
2840 if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
2841 return (EINVAL);
2842
2843 zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
2844
2845 error = xcopyin((void *)arg, zc, sizeof (zfs_cmd_t));
2846
2847 if (error == 0)
2848 error = zfs_ioc_vec[vec].zvec_secpolicy(zc, cr);
2849
2850 /*
2851 * Ensure that all pool/dataset names are valid before we pass down to
2852 * the lower layers.
2853 */
2854 if (error == 0) {
2855 zc->zc_name[sizeof (zc->zc_name) - 1] = '\0';
2856 switch (zfs_ioc_vec[vec].zvec_namecheck) {
2857 case POOL_NAME:
2858 if (pool_namecheck(zc->zc_name, NULL, NULL) != 0)
2859 error = EINVAL;
2860 break;
2861
2862 case DATASET_NAME:
2863 if (dataset_namecheck(zc->zc_name, NULL, NULL) != 0)
2864 error = EINVAL;
2865 break;
2866
2867 case NO_NAME:
2868 break;
2869 }
2870 }
2871
2872 if (error == 0)
2873 error = zfs_ioc_vec[vec].zvec_func(zc);
2874
2875 rc = xcopyout(zc, (void *)arg, sizeof (zfs_cmd_t));
2876 if (error == 0) {
2877 error = rc;
2878 if (zfs_ioc_vec[vec].zvec_his_log == B_TRUE)
2879 zfs_log_history(zc);
2880 }
2881
2882 kmem_free(zc, sizeof (zfs_cmd_t));
2883 return (error);
2884 }
2885
2886 static int
2887 zfs_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
2888 {
2889 if (cmd != DDI_ATTACH)
2890 return (DDI_FAILURE);
2891
2892 if (ddi_create_minor_node(dip, "zfs", S_IFCHR, 0,
2893 DDI_PSEUDO, 0) == DDI_FAILURE)
2894 return (DDI_FAILURE);
2895
2896 zfs_dip = dip;
2897
2898 ddi_report_dev(dip);
2899
2900 return (DDI_SUCCESS);
2901 }
2902
2903 static int
2904 zfs_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
2905 {
2906 if (spa_busy() || zfs_busy() || zvol_busy())
2907 return (DDI_FAILURE);
2908
2909 if (cmd != DDI_DETACH)
2910 return (DDI_FAILURE);
2911
2912 zfs_dip = NULL;
2913
2914 ddi_prop_remove_all(dip);
2915 ddi_remove_minor_node(dip, NULL);
2916
2917 return (DDI_SUCCESS);
2918 }
2919
2920 /*ARGSUSED*/
2921 static int
2922 zfs_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
2923 {
2924 switch (infocmd) {
2925 case DDI_INFO_DEVT2DEVINFO:
2926 *result = zfs_dip;
2927 return (DDI_SUCCESS);
2928
2929 case DDI_INFO_DEVT2INSTANCE:
2930 *result = (void *)0;
2931 return (DDI_SUCCESS);
2932 }
2933
2934 return (DDI_FAILURE);
2935 }
2936
2937 /*
2938 * OK, so this is a little weird.
2939 *
2940 * /dev/zfs is the control node, i.e. minor 0.
2941 * /dev/zvol/[r]dsk/pool/dataset are the zvols, minor > 0.
2942 *
2943 * /dev/zfs has basically nothing to do except serve up ioctls,
2944 * so most of the standard driver entry points are in zvol.c.
2945 */
2946 static struct cb_ops zfs_cb_ops = {
2947 zvol_open, /* open */
2948 zvol_close, /* close */
2949 zvol_strategy, /* strategy */
2950 nodev, /* print */
2951 zvol_dump, /* dump */
2952 zvol_read, /* read */
2953 zvol_write, /* write */
2954 zfsdev_ioctl, /* ioctl */
2955 nodev, /* devmap */
2956 nodev, /* mmap */
2957 nodev, /* segmap */
2958 nochpoll, /* poll */
2959 ddi_prop_op, /* prop_op */
2960 NULL, /* streamtab */
2961 D_NEW | D_MP | D_64BIT, /* Driver compatibility flag */
2962 CB_REV, /* version */
2963 nodev, /* async read */
2964 nodev, /* async write */
2965 };
2966
2967 static struct dev_ops zfs_dev_ops = {
2968 DEVO_REV, /* version */
2969 0, /* refcnt */
2970 zfs_info, /* info */
2971 nulldev, /* identify */
2972 nulldev, /* probe */
2973 zfs_attach, /* attach */
2974 zfs_detach, /* detach */
2975 nodev, /* reset */
2976 &zfs_cb_ops, /* driver operations */
2977 NULL /* no bus operations */
2978 };
2979
2980 static struct modldrv zfs_modldrv = {
2981 &mod_driverops, "ZFS storage pool version " SPA_VERSION_STRING,
2982 &zfs_dev_ops
2983 };
2984
2985 static struct modlinkage modlinkage = {
2986 MODREV_1,
2987 (void *)&zfs_modlfs,
2988 (void *)&zfs_modldrv,
2989 NULL
2990 };
2991
2992
2993 uint_t zfs_fsyncer_key;
2994 extern uint_t rrw_tsd_key;
2995
2996 int
2997 _init(void)
2998 {
2999 int error;
3000
3001 spa_init(FREAD | FWRITE);
3002 zfs_init();
3003 zvol_init();
3004
3005 if ((error = mod_install(&modlinkage)) != 0) {
3006 zvol_fini();
3007 zfs_fini();
3008 spa_fini();
3009 return (error);
3010 }
3011
3012 tsd_create(&zfs_fsyncer_key, NULL);
3013 tsd_create(&rrw_tsd_key, NULL);
3014
3015 error = ldi_ident_from_mod(&modlinkage, &zfs_li);
3016 ASSERT(error == 0);
3017 mutex_init(&zfs_share_lock, NULL, MUTEX_DEFAULT, NULL);
3018
3019 return (0);
3020 }
3021
3022 int
3023 _fini(void)
3024 {
3025 int error;
3026
3027 if (spa_busy() || zfs_busy() || zvol_busy() || zio_injection_enabled)
3028 return (EBUSY);
3029
3030 if ((error = mod_remove(&modlinkage)) != 0)
3031 return (error);
3032
3033 zvol_fini();
3034 zfs_fini();
3035 spa_fini();
3036 if (zfs_nfsshare_inited)
3037 (void) ddi_modclose(nfs_mod);
3038 if (zfs_smbshare_inited)
3039 (void) ddi_modclose(smbsrv_mod);
3040 if (zfs_nfsshare_inited || zfs_smbshare_inited)
3041 (void) ddi_modclose(sharefs_mod);
3042
3043 tsd_destroy(&zfs_fsyncer_key);
3044 ldi_ident_release(zfs_li);
3045 zfs_li = NULL;
3046 mutex_destroy(&zfs_share_lock);
3047
3048 return (error);
3049 }
3050
3051 int
3052 _info(struct modinfo *modinfop)
3053 {
3054 return (mod_info(&modlinkage, modinfop));
3055 }
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