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6f1ffb06 MA |
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 | /* | |
5dc8b736 | 23 | * Copyright (c) 2012, 2014 by Delphix. All rights reserved. |
95fd54a1 | 24 | * Copyright (c) 2013 Steven Hartland. All rights reserved. |
bec1067d | 25 | * Copyright (c) 2017 Datto Inc. |
d12f91fd | 26 | * Copyright 2017 RackTop Systems. |
6f1ffb06 MA |
27 | */ |
28 | ||
29 | /* | |
30 | * LibZFS_Core (lzc) is intended to replace most functionality in libzfs. | |
31 | * It has the following characteristics: | |
32 | * | |
33 | * - Thread Safe. libzfs_core is accessible concurrently from multiple | |
34 | * threads. This is accomplished primarily by avoiding global data | |
35 | * (e.g. caching). Since it's thread-safe, there is no reason for a | |
36 | * process to have multiple libzfs "instances". Therefore, we store | |
37 | * our few pieces of data (e.g. the file descriptor) in global | |
38 | * variables. The fd is reference-counted so that the libzfs_core | |
39 | * library can be "initialized" multiple times (e.g. by different | |
40 | * consumers within the same process). | |
41 | * | |
42 | * - Committed Interface. The libzfs_core interface will be committed, | |
43 | * therefore consumers can compile against it and be confident that | |
44 | * their code will continue to work on future releases of this code. | |
45 | * Currently, the interface is Evolving (not Committed), but we intend | |
46 | * to commit to it once it is more complete and we determine that it | |
47 | * meets the needs of all consumers. | |
48 | * | |
b8fce77b | 49 | * - Programmatic Error Handling. libzfs_core communicates errors with |
6f1ffb06 MA |
50 | * defined error numbers, and doesn't print anything to stdout/stderr. |
51 | * | |
52 | * - Thin Layer. libzfs_core is a thin layer, marshaling arguments | |
53 | * to/from the kernel ioctls. There is generally a 1:1 correspondence | |
54 | * between libzfs_core functions and ioctls to /dev/zfs. | |
55 | * | |
56 | * - Clear Atomicity. Because libzfs_core functions are generally 1:1 | |
57 | * with kernel ioctls, and kernel ioctls are general atomic, each | |
58 | * libzfs_core function is atomic. For example, creating multiple | |
59 | * snapshots with a single call to lzc_snapshot() is atomic -- it | |
60 | * can't fail with only some of the requested snapshots created, even | |
61 | * in the event of power loss or system crash. | |
62 | * | |
63 | * - Continued libzfs Support. Some higher-level operations (e.g. | |
64 | * support for "zfs send -R") are too complicated to fit the scope of | |
65 | * libzfs_core. This functionality will continue to live in libzfs. | |
66 | * Where appropriate, libzfs will use the underlying atomic operations | |
67 | * of libzfs_core. For example, libzfs may implement "zfs send -R | | |
68 | * zfs receive" by using individual "send one snapshot", rename, | |
69 | * destroy, and "receive one snapshot" operations in libzfs_core. | |
70 | * /sbin/zfs and /zbin/zpool will link with both libzfs and | |
71 | * libzfs_core. Other consumers should aim to use only libzfs_core, | |
72 | * since that will be the supported, stable interface going forwards. | |
73 | */ | |
74 | ||
75 | #include <libzfs_core.h> | |
76 | #include <ctype.h> | |
77 | #include <unistd.h> | |
78 | #include <stdlib.h> | |
79 | #include <string.h> | |
80 | #include <errno.h> | |
81 | #include <fcntl.h> | |
82 | #include <pthread.h> | |
83 | #include <sys/nvpair.h> | |
84 | #include <sys/param.h> | |
85 | #include <sys/types.h> | |
86 | #include <sys/stat.h> | |
87 | #include <sys/zfs_ioctl.h> | |
88 | ||
e2454897 | 89 | static int g_fd = -1; |
6f1ffb06 MA |
90 | static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER; |
91 | static int g_refcount; | |
92 | ||
93 | int | |
94 | libzfs_core_init(void) | |
95 | { | |
96 | (void) pthread_mutex_lock(&g_lock); | |
97 | if (g_refcount == 0) { | |
98 | g_fd = open("/dev/zfs", O_RDWR); | |
99 | if (g_fd < 0) { | |
100 | (void) pthread_mutex_unlock(&g_lock); | |
101 | return (errno); | |
102 | } | |
103 | } | |
104 | g_refcount++; | |
105 | (void) pthread_mutex_unlock(&g_lock); | |
106 | return (0); | |
107 | } | |
108 | ||
109 | void | |
110 | libzfs_core_fini(void) | |
111 | { | |
112 | (void) pthread_mutex_lock(&g_lock); | |
113 | ASSERT3S(g_refcount, >, 0); | |
e2454897 GM |
114 | |
115 | if (g_refcount > 0) | |
116 | g_refcount--; | |
117 | ||
118 | if (g_refcount == 0 && g_fd != -1) { | |
6f1ffb06 | 119 | (void) close(g_fd); |
e2454897 GM |
120 | g_fd = -1; |
121 | } | |
6f1ffb06 MA |
122 | (void) pthread_mutex_unlock(&g_lock); |
123 | } | |
124 | ||
125 | static int | |
126 | lzc_ioctl(zfs_ioc_t ioc, const char *name, | |
127 | nvlist_t *source, nvlist_t **resultp) | |
128 | { | |
13fe0198 | 129 | zfs_cmd_t zc = {"\0"}; |
6f1ffb06 | 130 | int error = 0; |
bec1067d AP |
131 | char *packed = NULL; |
132 | size_t size = 0; | |
6f1ffb06 MA |
133 | |
134 | ASSERT3S(g_refcount, >, 0); | |
e2454897 | 135 | VERIFY3S(g_fd, !=, -1); |
6f1ffb06 | 136 | |
bec1067d AP |
137 | if (name != NULL) |
138 | (void) strlcpy(zc.zc_name, name, sizeof (zc.zc_name)); | |
6f1ffb06 | 139 | |
bec1067d AP |
140 | if (source != NULL) { |
141 | packed = fnvlist_pack(source, &size); | |
142 | zc.zc_nvlist_src = (uint64_t)(uintptr_t)packed; | |
143 | zc.zc_nvlist_src_size = size; | |
144 | } | |
6f1ffb06 MA |
145 | |
146 | if (resultp != NULL) { | |
13fe0198 | 147 | *resultp = NULL; |
6f1ffb06 MA |
148 | zc.zc_nvlist_dst_size = MAX(size * 2, 128 * 1024); |
149 | zc.zc_nvlist_dst = (uint64_t)(uintptr_t) | |
150 | malloc(zc.zc_nvlist_dst_size); | |
151 | if (zc.zc_nvlist_dst == (uint64_t)0) { | |
152 | error = ENOMEM; | |
153 | goto out; | |
154 | } | |
155 | } | |
156 | ||
157 | while (ioctl(g_fd, ioc, &zc) != 0) { | |
158 | if (errno == ENOMEM && resultp != NULL) { | |
159 | free((void *)(uintptr_t)zc.zc_nvlist_dst); | |
160 | zc.zc_nvlist_dst_size *= 2; | |
161 | zc.zc_nvlist_dst = (uint64_t)(uintptr_t) | |
162 | malloc(zc.zc_nvlist_dst_size); | |
163 | if (zc.zc_nvlist_dst == (uint64_t)0) { | |
164 | error = ENOMEM; | |
165 | goto out; | |
166 | } | |
167 | } else { | |
168 | error = errno; | |
169 | break; | |
170 | } | |
171 | } | |
172 | if (zc.zc_nvlist_dst_filled) { | |
173 | *resultp = fnvlist_unpack((void *)(uintptr_t)zc.zc_nvlist_dst, | |
174 | zc.zc_nvlist_dst_size); | |
6f1ffb06 MA |
175 | } |
176 | ||
177 | out: | |
178 | fnvlist_pack_free(packed, size); | |
179 | free((void *)(uintptr_t)zc.zc_nvlist_dst); | |
180 | return (error); | |
181 | } | |
182 | ||
183 | int | |
e67a7ffb | 184 | lzc_create(const char *fsname, enum lzc_dataset_type type, nvlist_t *props) |
6f1ffb06 MA |
185 | { |
186 | int error; | |
187 | nvlist_t *args = fnvlist_alloc(); | |
e67a7ffb | 188 | fnvlist_add_int32(args, "type", (dmu_objset_type_t)type); |
6f1ffb06 MA |
189 | if (props != NULL) |
190 | fnvlist_add_nvlist(args, "props", props); | |
191 | error = lzc_ioctl(ZFS_IOC_CREATE, fsname, args, NULL); | |
192 | nvlist_free(args); | |
193 | return (error); | |
194 | } | |
195 | ||
196 | int | |
197 | lzc_clone(const char *fsname, const char *origin, | |
198 | nvlist_t *props) | |
199 | { | |
200 | int error; | |
201 | nvlist_t *args = fnvlist_alloc(); | |
202 | fnvlist_add_string(args, "origin", origin); | |
203 | if (props != NULL) | |
204 | fnvlist_add_nvlist(args, "props", props); | |
205 | error = lzc_ioctl(ZFS_IOC_CLONE, fsname, args, NULL); | |
206 | nvlist_free(args); | |
207 | return (error); | |
208 | } | |
209 | ||
d12f91fd GDN |
210 | int |
211 | lzc_promote(const char *fsname, char *snapnamebuf, int snapnamelen) | |
212 | { | |
213 | /* | |
214 | * The promote ioctl is still legacy, so we need to construct our | |
215 | * own zfs_cmd_t rather than using lzc_ioctl(). | |
216 | */ | |
217 | zfs_cmd_t zc = { "\0" }; | |
218 | ||
219 | ASSERT3S(g_refcount, >, 0); | |
220 | VERIFY3S(g_fd, !=, -1); | |
221 | ||
222 | (void) strlcpy(zc.zc_name, fsname, sizeof (zc.zc_name)); | |
223 | if (ioctl(g_fd, ZFS_IOC_PROMOTE, &zc) != 0) { | |
224 | int error = errno; | |
225 | if (error == EEXIST && snapnamebuf != NULL) | |
226 | (void) strlcpy(snapnamebuf, zc.zc_string, snapnamelen); | |
227 | return (error); | |
228 | } | |
229 | return (0); | |
230 | } | |
231 | ||
6f1ffb06 MA |
232 | /* |
233 | * Creates snapshots. | |
234 | * | |
235 | * The keys in the snaps nvlist are the snapshots to be created. | |
236 | * They must all be in the same pool. | |
237 | * | |
238 | * The props nvlist is properties to set. Currently only user properties | |
239 | * are supported. { user:prop_name -> string value } | |
240 | * | |
241 | * The returned results nvlist will have an entry for each snapshot that failed. | |
242 | * The value will be the (int32) error code. | |
243 | * | |
244 | * The return value will be 0 if all snapshots were created, otherwise it will | |
13fe0198 | 245 | * be the errno of a (unspecified) snapshot that failed. |
6f1ffb06 MA |
246 | */ |
247 | int | |
248 | lzc_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t **errlist) | |
249 | { | |
250 | nvpair_t *elem; | |
251 | nvlist_t *args; | |
252 | int error; | |
eca7b760 | 253 | char pool[ZFS_MAX_DATASET_NAME_LEN]; |
6f1ffb06 MA |
254 | |
255 | *errlist = NULL; | |
256 | ||
257 | /* determine the pool name */ | |
258 | elem = nvlist_next_nvpair(snaps, NULL); | |
259 | if (elem == NULL) | |
260 | return (0); | |
261 | (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); | |
262 | pool[strcspn(pool, "/@")] = '\0'; | |
263 | ||
264 | args = fnvlist_alloc(); | |
265 | fnvlist_add_nvlist(args, "snaps", snaps); | |
266 | if (props != NULL) | |
267 | fnvlist_add_nvlist(args, "props", props); | |
268 | ||
269 | error = lzc_ioctl(ZFS_IOC_SNAPSHOT, pool, args, errlist); | |
270 | nvlist_free(args); | |
271 | ||
272 | return (error); | |
273 | } | |
274 | ||
275 | /* | |
276 | * Destroys snapshots. | |
277 | * | |
278 | * The keys in the snaps nvlist are the snapshots to be destroyed. | |
279 | * They must all be in the same pool. | |
280 | * | |
281 | * Snapshots that do not exist will be silently ignored. | |
282 | * | |
283 | * If 'defer' is not set, and a snapshot has user holds or clones, the | |
284 | * destroy operation will fail and none of the snapshots will be | |
285 | * destroyed. | |
286 | * | |
287 | * If 'defer' is set, and a snapshot has user holds or clones, it will be | |
288 | * marked for deferred destruction, and will be destroyed when the last hold | |
289 | * or clone is removed/destroyed. | |
290 | * | |
291 | * The return value will be 0 if all snapshots were destroyed (or marked for | |
1a077756 | 292 | * later destruction if 'defer' is set) or didn't exist to begin with. |
6f1ffb06 | 293 | * |
13fe0198 | 294 | * Otherwise the return value will be the errno of a (unspecified) snapshot |
6f1ffb06 MA |
295 | * that failed, no snapshots will be destroyed, and the errlist will have an |
296 | * entry for each snapshot that failed. The value in the errlist will be | |
297 | * the (int32) error code. | |
298 | */ | |
299 | int | |
300 | lzc_destroy_snaps(nvlist_t *snaps, boolean_t defer, nvlist_t **errlist) | |
301 | { | |
302 | nvpair_t *elem; | |
303 | nvlist_t *args; | |
304 | int error; | |
eca7b760 | 305 | char pool[ZFS_MAX_DATASET_NAME_LEN]; |
6f1ffb06 MA |
306 | |
307 | /* determine the pool name */ | |
308 | elem = nvlist_next_nvpair(snaps, NULL); | |
309 | if (elem == NULL) | |
310 | return (0); | |
311 | (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); | |
312 | pool[strcspn(pool, "/@")] = '\0'; | |
313 | ||
314 | args = fnvlist_alloc(); | |
315 | fnvlist_add_nvlist(args, "snaps", snaps); | |
316 | if (defer) | |
317 | fnvlist_add_boolean(args, "defer"); | |
318 | ||
319 | error = lzc_ioctl(ZFS_IOC_DESTROY_SNAPS, pool, args, errlist); | |
320 | nvlist_free(args); | |
321 | ||
322 | return (error); | |
6f1ffb06 MA |
323 | } |
324 | ||
325 | int | |
326 | lzc_snaprange_space(const char *firstsnap, const char *lastsnap, | |
327 | uint64_t *usedp) | |
328 | { | |
329 | nvlist_t *args; | |
330 | nvlist_t *result; | |
331 | int err; | |
eca7b760 | 332 | char fs[ZFS_MAX_DATASET_NAME_LEN]; |
6f1ffb06 MA |
333 | char *atp; |
334 | ||
335 | /* determine the fs name */ | |
336 | (void) strlcpy(fs, firstsnap, sizeof (fs)); | |
337 | atp = strchr(fs, '@'); | |
338 | if (atp == NULL) | |
339 | return (EINVAL); | |
340 | *atp = '\0'; | |
341 | ||
342 | args = fnvlist_alloc(); | |
343 | fnvlist_add_string(args, "firstsnap", firstsnap); | |
344 | ||
345 | err = lzc_ioctl(ZFS_IOC_SPACE_SNAPS, lastsnap, args, &result); | |
346 | nvlist_free(args); | |
347 | if (err == 0) | |
348 | *usedp = fnvlist_lookup_uint64(result, "used"); | |
349 | fnvlist_free(result); | |
350 | ||
351 | return (err); | |
352 | } | |
353 | ||
354 | boolean_t | |
355 | lzc_exists(const char *dataset) | |
356 | { | |
357 | /* | |
358 | * The objset_stats ioctl is still legacy, so we need to construct our | |
d12f91fd | 359 | * own zfs_cmd_t rather than using lzc_ioctl(). |
6f1ffb06 | 360 | */ |
13fe0198 | 361 | zfs_cmd_t zc = {"\0"}; |
6f1ffb06 | 362 | |
e2454897 GM |
363 | ASSERT3S(g_refcount, >, 0); |
364 | VERIFY3S(g_fd, !=, -1); | |
365 | ||
6f1ffb06 MA |
366 | (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); |
367 | return (ioctl(g_fd, ZFS_IOC_OBJSET_STATS, &zc) == 0); | |
368 | } | |
369 | ||
bec1067d AP |
370 | /* |
371 | * outnvl is unused. | |
372 | * It was added to preserve the function signature in case it is | |
373 | * needed in the future. | |
374 | */ | |
375 | /*ARGSUSED*/ | |
376 | int | |
377 | lzc_sync(const char *pool_name, nvlist_t *innvl, nvlist_t **outnvl) | |
378 | { | |
379 | return (lzc_ioctl(ZFS_IOC_POOL_SYNC, pool_name, innvl, NULL)); | |
380 | } | |
381 | ||
13fe0198 MA |
382 | /* |
383 | * Create "user holds" on snapshots. If there is a hold on a snapshot, | |
384 | * the snapshot can not be destroyed. (However, it can be marked for deletion | |
385 | * by lzc_destroy_snaps(defer=B_TRUE).) | |
386 | * | |
387 | * The keys in the nvlist are snapshot names. | |
388 | * The snapshots must all be in the same pool. | |
389 | * The value is the name of the hold (string type). | |
390 | * | |
391 | * If cleanup_fd is not -1, it must be the result of open("/dev/zfs", O_EXCL). | |
392 | * In this case, when the cleanup_fd is closed (including on process | |
393 | * termination), the holds will be released. If the system is shut down | |
394 | * uncleanly, the holds will be released when the pool is next opened | |
395 | * or imported. | |
396 | * | |
95fd54a1 | 397 | * Holds for snapshots which don't exist will be skipped and have an entry |
1a077756 | 398 | * added to errlist, but will not cause an overall failure. |
95fd54a1 | 399 | * |
1a077756 | 400 | * The return value will be 0 if all holds, for snapshots that existed, |
b8fce77b | 401 | * were successfully created. |
95fd54a1 SH |
402 | * |
403 | * Otherwise the return value will be the errno of a (unspecified) hold that | |
404 | * failed and no holds will be created. | |
405 | * | |
406 | * In all cases the errlist will have an entry for each hold that failed | |
407 | * (name = snapshot), with its value being the error code (int32). | |
13fe0198 MA |
408 | */ |
409 | int | |
410 | lzc_hold(nvlist_t *holds, int cleanup_fd, nvlist_t **errlist) | |
411 | { | |
eca7b760 | 412 | char pool[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
413 | nvlist_t *args; |
414 | nvpair_t *elem; | |
415 | int error; | |
416 | ||
417 | /* determine the pool name */ | |
418 | elem = nvlist_next_nvpair(holds, NULL); | |
419 | if (elem == NULL) | |
420 | return (0); | |
421 | (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); | |
422 | pool[strcspn(pool, "/@")] = '\0'; | |
423 | ||
424 | args = fnvlist_alloc(); | |
425 | fnvlist_add_nvlist(args, "holds", holds); | |
426 | if (cleanup_fd != -1) | |
427 | fnvlist_add_int32(args, "cleanup_fd", cleanup_fd); | |
428 | ||
429 | error = lzc_ioctl(ZFS_IOC_HOLD, pool, args, errlist); | |
430 | nvlist_free(args); | |
431 | return (error); | |
432 | } | |
433 | ||
434 | /* | |
435 | * Release "user holds" on snapshots. If the snapshot has been marked for | |
436 | * deferred destroy (by lzc_destroy_snaps(defer=B_TRUE)), it does not have | |
437 | * any clones, and all the user holds are removed, then the snapshot will be | |
438 | * destroyed. | |
439 | * | |
440 | * The keys in the nvlist are snapshot names. | |
441 | * The snapshots must all be in the same pool. | |
d5884c34 | 442 | * The value is an nvlist whose keys are the holds to remove. |
13fe0198 | 443 | * |
95fd54a1 | 444 | * Holds which failed to release because they didn't exist will have an entry |
1a077756 | 445 | * added to errlist, but will not cause an overall failure. |
95fd54a1 SH |
446 | * |
447 | * The return value will be 0 if the nvl holds was empty or all holds that | |
1a077756 | 448 | * existed, were successfully removed. |
95fd54a1 SH |
449 | * |
450 | * Otherwise the return value will be the errno of a (unspecified) hold that | |
451 | * failed to release and no holds will be released. | |
452 | * | |
453 | * In all cases the errlist will have an entry for each hold that failed to | |
454 | * to release. | |
13fe0198 MA |
455 | */ |
456 | int | |
457 | lzc_release(nvlist_t *holds, nvlist_t **errlist) | |
458 | { | |
eca7b760 | 459 | char pool[ZFS_MAX_DATASET_NAME_LEN]; |
13fe0198 MA |
460 | nvpair_t *elem; |
461 | ||
462 | /* determine the pool name */ | |
463 | elem = nvlist_next_nvpair(holds, NULL); | |
464 | if (elem == NULL) | |
465 | return (0); | |
466 | (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); | |
467 | pool[strcspn(pool, "/@")] = '\0'; | |
468 | ||
469 | return (lzc_ioctl(ZFS_IOC_RELEASE, pool, holds, errlist)); | |
470 | } | |
471 | ||
472 | /* | |
473 | * Retrieve list of user holds on the specified snapshot. | |
474 | * | |
d5884c34 | 475 | * On success, *holdsp will be set to an nvlist which the caller must free. |
13fe0198 MA |
476 | * The keys are the names of the holds, and the value is the creation time |
477 | * of the hold (uint64) in seconds since the epoch. | |
478 | */ | |
479 | int | |
480 | lzc_get_holds(const char *snapname, nvlist_t **holdsp) | |
481 | { | |
bec1067d | 482 | return (lzc_ioctl(ZFS_IOC_GET_HOLDS, snapname, NULL, holdsp)); |
13fe0198 MA |
483 | } |
484 | ||
6f1ffb06 | 485 | /* |
9b67f605 MA |
486 | * Generate a zfs send stream for the specified snapshot and write it to |
487 | * the specified file descriptor. | |
da536844 MA |
488 | * |
489 | * "snapname" is the full name of the snapshot to send (e.g. "pool/fs@snap") | |
490 | * | |
491 | * If "from" is NULL, a full (non-incremental) stream will be sent. | |
492 | * If "from" is non-NULL, it must be the full name of a snapshot or | |
493 | * bookmark to send an incremental from (e.g. "pool/fs@earlier_snap" or | |
494 | * "pool/fs#earlier_bmark"). If non-NULL, the specified snapshot or | |
495 | * bookmark must represent an earlier point in the history of "snapname"). | |
496 | * It can be an earlier snapshot in the same filesystem or zvol as "snapname", | |
497 | * or it can be the origin of "snapname"'s filesystem, or an earlier | |
498 | * snapshot in the origin, etc. | |
499 | * | |
500 | * "fd" is the file descriptor to write the send stream to. | |
9b67f605 | 501 | * |
f1512ee6 MA |
502 | * If "flags" contains LZC_SEND_FLAG_LARGE_BLOCK, the stream is permitted |
503 | * to contain DRR_WRITE records with drr_length > 128K, and DRR_OBJECT | |
504 | * records with drr_blksz > 128K. | |
505 | * | |
9b67f605 MA |
506 | * If "flags" contains LZC_SEND_FLAG_EMBED_DATA, the stream is permitted |
507 | * to contain DRR_WRITE_EMBEDDED records with drr_etype==BP_EMBEDDED_TYPE_DATA, | |
508 | * which the receiving system must support (as indicated by support | |
509 | * for the "embedded_data" feature). | |
6f1ffb06 MA |
510 | */ |
511 | int | |
9b67f605 MA |
512 | lzc_send(const char *snapname, const char *from, int fd, |
513 | enum lzc_send_flags flags) | |
47dfff3b MA |
514 | { |
515 | return (lzc_send_resume(snapname, from, fd, flags, 0, 0)); | |
516 | } | |
517 | ||
518 | int | |
519 | lzc_send_resume(const char *snapname, const char *from, int fd, | |
520 | enum lzc_send_flags flags, uint64_t resumeobj, uint64_t resumeoff) | |
6f1ffb06 MA |
521 | { |
522 | nvlist_t *args; | |
523 | int err; | |
524 | ||
525 | args = fnvlist_alloc(); | |
526 | fnvlist_add_int32(args, "fd", fd); | |
da536844 MA |
527 | if (from != NULL) |
528 | fnvlist_add_string(args, "fromsnap", from); | |
f1512ee6 MA |
529 | if (flags & LZC_SEND_FLAG_LARGE_BLOCK) |
530 | fnvlist_add_boolean(args, "largeblockok"); | |
9b67f605 MA |
531 | if (flags & LZC_SEND_FLAG_EMBED_DATA) |
532 | fnvlist_add_boolean(args, "embedok"); | |
a7004725 DK |
533 | if (flags & LZC_SEND_FLAG_COMPRESS) |
534 | fnvlist_add_boolean(args, "compressok"); | |
47dfff3b MA |
535 | if (resumeobj != 0 || resumeoff != 0) { |
536 | fnvlist_add_uint64(args, "resume_object", resumeobj); | |
537 | fnvlist_add_uint64(args, "resume_offset", resumeoff); | |
538 | } | |
6f1ffb06 MA |
539 | err = lzc_ioctl(ZFS_IOC_SEND_NEW, snapname, args, NULL); |
540 | nvlist_free(args); | |
541 | return (err); | |
542 | } | |
543 | ||
544 | /* | |
5dc8b736 MG |
545 | * "from" can be NULL, a snapshot, or a bookmark. |
546 | * | |
547 | * If from is NULL, a full (non-incremental) stream will be estimated. This | |
548 | * is calculated very efficiently. | |
549 | * | |
550 | * If from is a snapshot, lzc_send_space uses the deadlists attached to | |
551 | * each snapshot to efficiently estimate the stream size. | |
552 | * | |
553 | * If from is a bookmark, the indirect blocks in the destination snapshot | |
554 | * are traversed, looking for blocks with a birth time since the creation TXG of | |
555 | * the snapshot this bookmark was created from. This will result in | |
556 | * significantly more I/O and be less efficient than a send space estimation on | |
557 | * an equivalent snapshot. | |
6f1ffb06 MA |
558 | */ |
559 | int | |
2aa34383 DK |
560 | lzc_send_space(const char *snapname, const char *from, |
561 | enum lzc_send_flags flags, uint64_t *spacep) | |
6f1ffb06 MA |
562 | { |
563 | nvlist_t *args; | |
564 | nvlist_t *result; | |
565 | int err; | |
566 | ||
567 | args = fnvlist_alloc(); | |
5dc8b736 MG |
568 | if (from != NULL) |
569 | fnvlist_add_string(args, "from", from); | |
2aa34383 DK |
570 | if (flags & LZC_SEND_FLAG_LARGE_BLOCK) |
571 | fnvlist_add_boolean(args, "largeblockok"); | |
572 | if (flags & LZC_SEND_FLAG_EMBED_DATA) | |
573 | fnvlist_add_boolean(args, "embedok"); | |
574 | if (flags & LZC_SEND_FLAG_COMPRESS) | |
575 | fnvlist_add_boolean(args, "compressok"); | |
6f1ffb06 MA |
576 | err = lzc_ioctl(ZFS_IOC_SEND_SPACE, snapname, args, &result); |
577 | nvlist_free(args); | |
578 | if (err == 0) | |
579 | *spacep = fnvlist_lookup_uint64(result, "space"); | |
580 | nvlist_free(result); | |
581 | return (err); | |
582 | } | |
583 | ||
584 | static int | |
585 | recv_read(int fd, void *buf, int ilen) | |
586 | { | |
587 | char *cp = buf; | |
588 | int rv; | |
589 | int len = ilen; | |
590 | ||
591 | do { | |
592 | rv = read(fd, cp, len); | |
593 | cp += rv; | |
594 | len -= rv; | |
595 | } while (rv > 0); | |
596 | ||
597 | if (rv < 0 || len != 0) | |
598 | return (EIO); | |
599 | ||
600 | return (0); | |
601 | } | |
602 | ||
43e52edd BB |
603 | /* |
604 | * Linux adds ZFS_IOC_RECV_NEW for resumable streams and preserves the legacy | |
605 | * ZFS_IOC_RECV user/kernel interface. The new interface supports all stream | |
606 | * options but is currently only used for resumable streams. This way updated | |
607 | * user space utilities will interoperate with older kernel modules. | |
608 | * | |
609 | * Non-Linux OpenZFS platforms have opted to modify the legacy interface. | |
610 | */ | |
47dfff3b | 611 | static int |
a3eeab2d | 612 | recv_impl(const char *snapname, nvlist_t *recvdprops, nvlist_t *localprops, |
613 | const char *origin, boolean_t force, boolean_t resumable, int input_fd, | |
43e52edd BB |
614 | const dmu_replay_record_t *begin_record, int cleanup_fd, |
615 | uint64_t *read_bytes, uint64_t *errflags, uint64_t *action_handle, | |
616 | nvlist_t **errors) | |
6f1ffb06 | 617 | { |
43e52edd BB |
618 | dmu_replay_record_t drr; |
619 | char fsname[MAXPATHLEN]; | |
6f1ffb06 | 620 | char *atp; |
6f1ffb06 MA |
621 | int error; |
622 | ||
e2454897 GM |
623 | ASSERT3S(g_refcount, >, 0); |
624 | VERIFY3S(g_fd, !=, -1); | |
625 | ||
43e52edd BB |
626 | /* Set 'fsname' to the name of containing filesystem */ |
627 | (void) strlcpy(fsname, snapname, sizeof (fsname)); | |
628 | atp = strchr(fsname, '@'); | |
6f1ffb06 MA |
629 | if (atp == NULL) |
630 | return (EINVAL); | |
631 | *atp = '\0'; | |
632 | ||
43e52edd BB |
633 | /* If the fs does not exist, try its parent. */ |
634 | if (!lzc_exists(fsname)) { | |
635 | char *slashp = strrchr(fsname, '/'); | |
6f1ffb06 MA |
636 | if (slashp == NULL) |
637 | return (ENOENT); | |
638 | *slashp = '\0'; | |
43e52edd | 639 | } |
6f1ffb06 | 640 | |
43e52edd BB |
641 | /* |
642 | * The begin_record is normally a non-byteswapped BEGIN record. | |
643 | * For resumable streams it may be set to any non-byteswapped | |
644 | * dmu_replay_record_t. | |
645 | */ | |
646 | if (begin_record == NULL) { | |
647 | error = recv_read(input_fd, &drr, sizeof (drr)); | |
648 | if (error != 0) | |
649 | return (error); | |
650 | } else { | |
651 | drr = *begin_record; | |
6f1ffb06 MA |
652 | } |
653 | ||
43e52edd BB |
654 | if (resumable) { |
655 | nvlist_t *outnvl = NULL; | |
656 | nvlist_t *innvl = fnvlist_alloc(); | |
6f1ffb06 | 657 | |
43e52edd | 658 | fnvlist_add_string(innvl, "snapname", snapname); |
6f1ffb06 | 659 | |
a3eeab2d | 660 | if (recvdprops != NULL) |
661 | fnvlist_add_nvlist(innvl, "props", recvdprops); | |
662 | ||
663 | if (localprops != NULL) | |
664 | fnvlist_add_nvlist(innvl, "localprops", localprops); | |
6f1ffb06 | 665 | |
43e52edd BB |
666 | if (origin != NULL && strlen(origin)) |
667 | fnvlist_add_string(innvl, "origin", origin); | |
668 | ||
669 | fnvlist_add_byte_array(innvl, "begin_record", | |
02730c33 | 670 | (uchar_t *)&drr, sizeof (drr)); |
43e52edd BB |
671 | |
672 | fnvlist_add_int32(innvl, "input_fd", input_fd); | |
673 | ||
674 | if (force) | |
675 | fnvlist_add_boolean(innvl, "force"); | |
676 | ||
677 | if (resumable) | |
678 | fnvlist_add_boolean(innvl, "resumable"); | |
679 | ||
680 | if (cleanup_fd >= 0) | |
681 | fnvlist_add_int32(innvl, "cleanup_fd", cleanup_fd); | |
682 | ||
683 | if (action_handle != NULL) | |
684 | fnvlist_add_uint64(innvl, "action_handle", | |
685 | *action_handle); | |
686 | ||
687 | error = lzc_ioctl(ZFS_IOC_RECV_NEW, fsname, innvl, &outnvl); | |
688 | ||
689 | if (error == 0 && read_bytes != NULL) | |
690 | error = nvlist_lookup_uint64(outnvl, "read_bytes", | |
691 | read_bytes); | |
692 | ||
693 | if (error == 0 && errflags != NULL) | |
694 | error = nvlist_lookup_uint64(outnvl, "error_flags", | |
695 | errflags); | |
696 | ||
697 | if (error == 0 && action_handle != NULL) | |
698 | error = nvlist_lookup_uint64(outnvl, "action_handle", | |
699 | action_handle); | |
700 | ||
701 | if (error == 0 && errors != NULL) { | |
702 | nvlist_t *nvl; | |
703 | error = nvlist_lookup_nvlist(outnvl, "errors", &nvl); | |
704 | if (error == 0) | |
705 | *errors = fnvlist_dup(nvl); | |
706 | } | |
707 | ||
708 | fnvlist_free(innvl); | |
709 | fnvlist_free(outnvl); | |
fd41e935 | 710 | } else { |
43e52edd BB |
711 | zfs_cmd_t zc = {"\0"}; |
712 | char *packed = NULL; | |
713 | size_t size; | |
6f1ffb06 | 714 | |
43e52edd | 715 | ASSERT3S(g_refcount, >, 0); |
6f1ffb06 | 716 | |
43e52edd BB |
717 | (void) strlcpy(zc.zc_name, fsname, sizeof (zc.zc_value)); |
718 | (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); | |
6f1ffb06 | 719 | |
a3eeab2d | 720 | if (recvdprops != NULL) { |
721 | packed = fnvlist_pack(recvdprops, &size); | |
43e52edd BB |
722 | zc.zc_nvlist_src = (uint64_t)(uintptr_t)packed; |
723 | zc.zc_nvlist_src_size = size; | |
724 | } | |
47dfff3b | 725 | |
a3eeab2d | 726 | if (localprops != NULL) { |
727 | packed = fnvlist_pack(localprops, &size); | |
728 | zc.zc_nvlist_conf = (uint64_t)(uintptr_t)packed; | |
729 | zc.zc_nvlist_conf_size = size; | |
730 | } | |
731 | ||
43e52edd BB |
732 | if (origin != NULL) |
733 | (void) strlcpy(zc.zc_string, origin, | |
734 | sizeof (zc.zc_string)); | |
6f1ffb06 | 735 | |
43e52edd BB |
736 | ASSERT3S(drr.drr_type, ==, DRR_BEGIN); |
737 | zc.zc_begin_record = drr.drr_u.drr_begin; | |
738 | zc.zc_guid = force; | |
739 | zc.zc_cookie = input_fd; | |
740 | zc.zc_cleanup_fd = -1; | |
741 | zc.zc_action_handle = 0; | |
742 | ||
743 | if (cleanup_fd >= 0) | |
744 | zc.zc_cleanup_fd = cleanup_fd; | |
745 | ||
746 | if (action_handle != NULL) | |
747 | zc.zc_action_handle = *action_handle; | |
748 | ||
749 | zc.zc_nvlist_dst_size = 128 * 1024; | |
750 | zc.zc_nvlist_dst = (uint64_t)(uintptr_t) | |
751 | malloc(zc.zc_nvlist_dst_size); | |
752 | ||
753 | error = ioctl(g_fd, ZFS_IOC_RECV, &zc); | |
754 | if (error != 0) { | |
755 | error = errno; | |
756 | } else { | |
757 | if (read_bytes != NULL) | |
758 | *read_bytes = zc.zc_cookie; | |
759 | ||
760 | if (errflags != NULL) | |
761 | *errflags = zc.zc_obj; | |
762 | ||
763 | if (action_handle != NULL) | |
764 | *action_handle = zc.zc_action_handle; | |
765 | ||
766 | if (errors != NULL) | |
767 | VERIFY0(nvlist_unpack( | |
768 | (void *)(uintptr_t)zc.zc_nvlist_dst, | |
769 | zc.zc_nvlist_dst_size, errors, KM_SLEEP)); | |
770 | } | |
771 | ||
772 | if (packed != NULL) | |
773 | fnvlist_pack_free(packed, size); | |
774 | free((void *)(uintptr_t)zc.zc_nvlist_dst); | |
775 | } | |
6f1ffb06 | 776 | |
6f1ffb06 MA |
777 | return (error); |
778 | } | |
46ba1e59 | 779 | |
47dfff3b MA |
780 | /* |
781 | * The simplest receive case: receive from the specified fd, creating the | |
782 | * specified snapshot. Apply the specified properties as "received" properties | |
783 | * (which can be overridden by locally-set properties). If the stream is a | |
784 | * clone, its origin snapshot must be specified by 'origin'. The 'force' | |
785 | * flag will cause the target filesystem to be rolled back or destroyed if | |
786 | * necessary to receive. | |
787 | * | |
788 | * Return 0 on success or an errno on failure. | |
789 | * | |
790 | * Note: this interface does not work on dedup'd streams | |
791 | * (those with DMU_BACKUP_FEATURE_DEDUP). | |
792 | */ | |
793 | int | |
794 | lzc_receive(const char *snapname, nvlist_t *props, const char *origin, | |
795 | boolean_t force, int fd) | |
796 | { | |
a3eeab2d | 797 | return (recv_impl(snapname, props, NULL, origin, force, B_FALSE, fd, |
43e52edd | 798 | NULL, -1, NULL, NULL, NULL, NULL)); |
47dfff3b MA |
799 | } |
800 | ||
801 | /* | |
802 | * Like lzc_receive, but if the receive fails due to premature stream | |
803 | * termination, the intermediate state will be preserved on disk. In this | |
804 | * case, ECKSUM will be returned. The receive may subsequently be resumed | |
805 | * with a resuming send stream generated by lzc_send_resume(). | |
806 | */ | |
807 | int | |
808 | lzc_receive_resumable(const char *snapname, nvlist_t *props, const char *origin, | |
809 | boolean_t force, int fd) | |
810 | { | |
a3eeab2d | 811 | return (recv_impl(snapname, props, NULL, origin, force, B_TRUE, fd, |
43e52edd | 812 | NULL, -1, NULL, NULL, NULL, NULL)); |
fd41e935 BB |
813 | } |
814 | ||
815 | /* | |
816 | * Like lzc_receive, but allows the caller to read the begin record and then to | |
817 | * pass it in. That could be useful if the caller wants to derive, for example, | |
818 | * the snapname or the origin parameters based on the information contained in | |
819 | * the begin record. | |
820 | * The begin record must be in its original form as read from the stream, | |
821 | * in other words, it should not be byteswapped. | |
822 | * | |
823 | * The 'resumable' parameter allows to obtain the same behavior as with | |
824 | * lzc_receive_resumable. | |
825 | */ | |
826 | int | |
827 | lzc_receive_with_header(const char *snapname, nvlist_t *props, | |
828 | const char *origin, boolean_t force, boolean_t resumable, int fd, | |
829 | const dmu_replay_record_t *begin_record) | |
830 | { | |
831 | if (begin_record == NULL) | |
832 | return (EINVAL); | |
a3eeab2d | 833 | return (recv_impl(snapname, props, NULL, origin, force, resumable, fd, |
43e52edd BB |
834 | begin_record, -1, NULL, NULL, NULL, NULL)); |
835 | } | |
836 | ||
837 | /* | |
838 | * Like lzc_receive, but allows the caller to pass all supported arguments | |
839 | * and retrieve all values returned. The only additional input parameter | |
840 | * is 'cleanup_fd' which is used to set a cleanup-on-exit file descriptor. | |
841 | * | |
842 | * The following parameters all provide return values. Several may be set | |
843 | * in the failure case and will contain additional information. | |
844 | * | |
845 | * The 'read_bytes' value will be set to the total number of bytes read. | |
846 | * | |
847 | * The 'errflags' value will contain zprop_errflags_t flags which are | |
848 | * used to describe any failures. | |
849 | * | |
850 | * The 'action_handle' is used to pass the handle for this guid/ds mapping. | |
851 | * It should be set to zero on first call and will contain an updated handle | |
852 | * on success, it should be passed in subsequent calls. | |
853 | * | |
854 | * The 'errors' nvlist contains an entry for each unapplied received | |
855 | * property. Callers are responsible for freeing this nvlist. | |
856 | */ | |
857 | int lzc_receive_one(const char *snapname, nvlist_t *props, | |
858 | const char *origin, boolean_t force, boolean_t resumable, int input_fd, | |
859 | const dmu_replay_record_t *begin_record, int cleanup_fd, | |
860 | uint64_t *read_bytes, uint64_t *errflags, uint64_t *action_handle, | |
861 | nvlist_t **errors) | |
862 | { | |
a3eeab2d | 863 | return (recv_impl(snapname, props, NULL, origin, force, resumable, |
864 | input_fd, begin_record, cleanup_fd, read_bytes, errflags, | |
865 | action_handle, errors)); | |
866 | } | |
867 | ||
868 | /* | |
869 | * Like lzc_receive_one, but allows the caller to pass an additional 'cmdprops' | |
870 | * argument. | |
871 | * | |
872 | * The 'cmdprops' nvlist contains both override ('zfs receive -o') and | |
873 | * exclude ('zfs receive -x') properties. Callers are responsible for freeing | |
874 | * this nvlist | |
875 | */ | |
876 | int lzc_receive_with_cmdprops(const char *snapname, nvlist_t *props, | |
877 | nvlist_t *cmdprops, const char *origin, boolean_t force, | |
878 | boolean_t resumable, int input_fd, const dmu_replay_record_t *begin_record, | |
879 | int cleanup_fd, uint64_t *read_bytes, uint64_t *errflags, | |
880 | uint64_t *action_handle, nvlist_t **errors) | |
881 | { | |
882 | return (recv_impl(snapname, props, cmdprops, origin, force, resumable, | |
43e52edd BB |
883 | input_fd, begin_record, cleanup_fd, read_bytes, errflags, |
884 | action_handle, errors)); | |
47dfff3b MA |
885 | } |
886 | ||
46ba1e59 MA |
887 | /* |
888 | * Roll back this filesystem or volume to its most recent snapshot. | |
889 | * If snapnamebuf is not NULL, it will be filled in with the name | |
890 | * of the most recent snapshot. | |
8ca78ab0 AG |
891 | * Note that the latest snapshot may change if a new one is concurrently |
892 | * created or the current one is destroyed. lzc_rollback_to can be used | |
893 | * to roll back to a specific latest snapshot. | |
46ba1e59 MA |
894 | * |
895 | * Return 0 on success or an errno on failure. | |
896 | */ | |
897 | int | |
898 | lzc_rollback(const char *fsname, char *snapnamebuf, int snapnamelen) | |
899 | { | |
900 | nvlist_t *args; | |
901 | nvlist_t *result; | |
902 | int err; | |
903 | ||
904 | args = fnvlist_alloc(); | |
905 | err = lzc_ioctl(ZFS_IOC_ROLLBACK, fsname, args, &result); | |
906 | nvlist_free(args); | |
907 | if (err == 0 && snapnamebuf != NULL) { | |
908 | const char *snapname = fnvlist_lookup_string(result, "target"); | |
909 | (void) strlcpy(snapnamebuf, snapname, snapnamelen); | |
910 | } | |
bb7ffdaf GM |
911 | nvlist_free(result); |
912 | ||
46ba1e59 MA |
913 | return (err); |
914 | } | |
da536844 | 915 | |
8ca78ab0 AG |
916 | /* |
917 | * Roll back this filesystem or volume to the specified snapshot, | |
918 | * if possible. | |
919 | * | |
920 | * Return 0 on success or an errno on failure. | |
921 | */ | |
922 | int | |
923 | lzc_rollback_to(const char *fsname, const char *snapname) | |
924 | { | |
925 | nvlist_t *args; | |
926 | nvlist_t *result; | |
927 | int err; | |
928 | ||
929 | args = fnvlist_alloc(); | |
930 | fnvlist_add_string(args, "target", snapname); | |
931 | err = lzc_ioctl(ZFS_IOC_ROLLBACK, fsname, args, &result); | |
932 | nvlist_free(args); | |
933 | nvlist_free(result); | |
934 | return (err); | |
935 | } | |
936 | ||
da536844 MA |
937 | /* |
938 | * Creates bookmarks. | |
939 | * | |
940 | * The bookmarks nvlist maps from name of the bookmark (e.g. "pool/fs#bmark") to | |
941 | * the name of the snapshot (e.g. "pool/fs@snap"). All the bookmarks and | |
942 | * snapshots must be in the same pool. | |
943 | * | |
944 | * The returned results nvlist will have an entry for each bookmark that failed. | |
945 | * The value will be the (int32) error code. | |
946 | * | |
947 | * The return value will be 0 if all bookmarks were created, otherwise it will | |
948 | * be the errno of a (undetermined) bookmarks that failed. | |
949 | */ | |
950 | int | |
951 | lzc_bookmark(nvlist_t *bookmarks, nvlist_t **errlist) | |
952 | { | |
953 | nvpair_t *elem; | |
954 | int error; | |
eca7b760 | 955 | char pool[ZFS_MAX_DATASET_NAME_LEN]; |
da536844 MA |
956 | |
957 | /* determine the pool name */ | |
958 | elem = nvlist_next_nvpair(bookmarks, NULL); | |
959 | if (elem == NULL) | |
960 | return (0); | |
961 | (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); | |
962 | pool[strcspn(pool, "/#")] = '\0'; | |
963 | ||
964 | error = lzc_ioctl(ZFS_IOC_BOOKMARK, pool, bookmarks, errlist); | |
965 | ||
966 | return (error); | |
967 | } | |
968 | ||
969 | /* | |
970 | * Retrieve bookmarks. | |
971 | * | |
972 | * Retrieve the list of bookmarks for the given file system. The props | |
973 | * parameter is an nvlist of property names (with no values) that will be | |
974 | * returned for each bookmark. | |
975 | * | |
976 | * The following are valid properties on bookmarks, all of which are numbers | |
977 | * (represented as uint64 in the nvlist) | |
978 | * | |
979 | * "guid" - globally unique identifier of the snapshot it refers to | |
980 | * "createtxg" - txg when the snapshot it refers to was created | |
981 | * "creation" - timestamp when the snapshot it refers to was created | |
982 | * | |
983 | * The format of the returned nvlist as follows: | |
984 | * <short name of bookmark> -> { | |
985 | * <name of property> -> { | |
986 | * "value" -> uint64 | |
987 | * } | |
988 | * } | |
989 | */ | |
990 | int | |
991 | lzc_get_bookmarks(const char *fsname, nvlist_t *props, nvlist_t **bmarks) | |
992 | { | |
993 | return (lzc_ioctl(ZFS_IOC_GET_BOOKMARKS, fsname, props, bmarks)); | |
994 | } | |
995 | ||
996 | /* | |
997 | * Destroys bookmarks. | |
998 | * | |
999 | * The keys in the bmarks nvlist are the bookmarks to be destroyed. | |
1000 | * They must all be in the same pool. Bookmarks are specified as | |
1001 | * <fs>#<bmark>. | |
1002 | * | |
1003 | * Bookmarks that do not exist will be silently ignored. | |
1004 | * | |
1005 | * The return value will be 0 if all bookmarks that existed were destroyed. | |
1006 | * | |
1007 | * Otherwise the return value will be the errno of a (undetermined) bookmark | |
1008 | * that failed, no bookmarks will be destroyed, and the errlist will have an | |
1009 | * entry for each bookmarks that failed. The value in the errlist will be | |
1010 | * the (int32) error code. | |
1011 | */ | |
1012 | int | |
1013 | lzc_destroy_bookmarks(nvlist_t *bmarks, nvlist_t **errlist) | |
1014 | { | |
1015 | nvpair_t *elem; | |
1016 | int error; | |
eca7b760 | 1017 | char pool[ZFS_MAX_DATASET_NAME_LEN]; |
da536844 MA |
1018 | |
1019 | /* determine the pool name */ | |
1020 | elem = nvlist_next_nvpair(bmarks, NULL); | |
1021 | if (elem == NULL) | |
1022 | return (0); | |
1023 | (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); | |
1024 | pool[strcspn(pool, "/#")] = '\0'; | |
1025 | ||
1026 | error = lzc_ioctl(ZFS_IOC_DESTROY_BOOKMARKS, pool, bmarks, errlist); | |
1027 | ||
1028 | return (error); | |
1029 | } |