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Optimize creation and removal of temporary "user holds" placed on
snapshots by a zfs send, by ensuring all the required holds and
releases are done in a single dsl_sync_task.
Creation now collates the required holds during a dry run and
then uses a single lzc_hold call via zfs_hold_apply instead of
processing each snapshot in turn.
Defered (on exit) cleanup by the kernel is also now done in
dsl_sync_task by reusing dsl_dataset_user_release.
On a test with 11 volumes in a tree each with 8 snapshots on a
single HDD zpool this reduces the time required to perform a full
send from 20 seconds to under 0.8 seconds.
For reference eliminating the hold entirely reduces this 0.15
seconds.
While I'm here:-
* Remove some unused structures
* Fix nvlist_t leak in zfs_release_one
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--- old/usr/src/lib/libzfs/common/libzfs_dataset.c
+++ new/usr/src/lib/libzfs/common/libzfs_dataset.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 24 * Copyright (c) 2012 by Delphix. All rights reserved.
25 25 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved.
26 26 * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
27 27 */
28 28
29 29 #include <ctype.h>
30 30 #include <errno.h>
31 31 #include <libintl.h>
32 32 #include <math.h>
33 33 #include <stdio.h>
34 34 #include <stdlib.h>
35 35 #include <strings.h>
36 36 #include <unistd.h>
37 37 #include <stddef.h>
38 38 #include <zone.h>
39 39 #include <fcntl.h>
40 40 #include <sys/mntent.h>
41 41 #include <sys/mount.h>
42 42 #include <priv.h>
43 43 #include <pwd.h>
44 44 #include <grp.h>
45 45 #include <stddef.h>
46 46 #include <ucred.h>
47 47 #include <idmap.h>
48 48 #include <aclutils.h>
49 49 #include <directory.h>
50 50
51 51 #include <sys/dnode.h>
52 52 #include <sys/spa.h>
53 53 #include <sys/zap.h>
54 54 #include <libzfs.h>
55 55
56 56 #include "zfs_namecheck.h"
57 57 #include "zfs_prop.h"
58 58 #include "libzfs_impl.h"
59 59 #include "zfs_deleg.h"
60 60
61 61 static int userquota_propname_decode(const char *propname, boolean_t zoned,
62 62 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
63 63
64 64 /*
65 65 * Given a single type (not a mask of types), return the type in a human
66 66 * readable form.
67 67 */
68 68 const char *
69 69 zfs_type_to_name(zfs_type_t type)
70 70 {
71 71 switch (type) {
72 72 case ZFS_TYPE_FILESYSTEM:
73 73 return (dgettext(TEXT_DOMAIN, "filesystem"));
74 74 case ZFS_TYPE_SNAPSHOT:
75 75 return (dgettext(TEXT_DOMAIN, "snapshot"));
76 76 case ZFS_TYPE_VOLUME:
77 77 return (dgettext(TEXT_DOMAIN, "volume"));
78 78 }
79 79
80 80 return (NULL);
81 81 }
82 82
83 83 /*
84 84 * Given a path and mask of ZFS types, return a string describing this dataset.
85 85 * This is used when we fail to open a dataset and we cannot get an exact type.
86 86 * We guess what the type would have been based on the path and the mask of
87 87 * acceptable types.
88 88 */
89 89 static const char *
90 90 path_to_str(const char *path, int types)
91 91 {
92 92 /*
93 93 * When given a single type, always report the exact type.
94 94 */
95 95 if (types == ZFS_TYPE_SNAPSHOT)
96 96 return (dgettext(TEXT_DOMAIN, "snapshot"));
97 97 if (types == ZFS_TYPE_FILESYSTEM)
98 98 return (dgettext(TEXT_DOMAIN, "filesystem"));
99 99 if (types == ZFS_TYPE_VOLUME)
100 100 return (dgettext(TEXT_DOMAIN, "volume"));
101 101
102 102 /*
103 103 * The user is requesting more than one type of dataset. If this is the
104 104 * case, consult the path itself. If we're looking for a snapshot, and
105 105 * a '@' is found, then report it as "snapshot". Otherwise, remove the
106 106 * snapshot attribute and try again.
107 107 */
108 108 if (types & ZFS_TYPE_SNAPSHOT) {
109 109 if (strchr(path, '@') != NULL)
110 110 return (dgettext(TEXT_DOMAIN, "snapshot"));
111 111 return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT));
112 112 }
113 113
114 114 /*
115 115 * The user has requested either filesystems or volumes.
116 116 * We have no way of knowing a priori what type this would be, so always
117 117 * report it as "filesystem" or "volume", our two primitive types.
118 118 */
119 119 if (types & ZFS_TYPE_FILESYSTEM)
120 120 return (dgettext(TEXT_DOMAIN, "filesystem"));
121 121
122 122 assert(types & ZFS_TYPE_VOLUME);
123 123 return (dgettext(TEXT_DOMAIN, "volume"));
124 124 }
125 125
126 126 /*
127 127 * Validate a ZFS path. This is used even before trying to open the dataset, to
128 128 * provide a more meaningful error message. We call zfs_error_aux() to
129 129 * explain exactly why the name was not valid.
130 130 */
131 131 int
132 132 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
133 133 boolean_t modifying)
134 134 {
135 135 namecheck_err_t why;
136 136 char what;
137 137
138 138 (void) zfs_prop_get_table();
139 139 if (dataset_namecheck(path, &why, &what) != 0) {
140 140 if (hdl != NULL) {
141 141 switch (why) {
142 142 case NAME_ERR_TOOLONG:
143 143 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
144 144 "name is too long"));
145 145 break;
146 146
147 147 case NAME_ERR_LEADING_SLASH:
148 148 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
149 149 "leading slash in name"));
150 150 break;
151 151
152 152 case NAME_ERR_EMPTY_COMPONENT:
153 153 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
154 154 "empty component in name"));
155 155 break;
156 156
157 157 case NAME_ERR_TRAILING_SLASH:
158 158 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
159 159 "trailing slash in name"));
160 160 break;
161 161
162 162 case NAME_ERR_INVALCHAR:
163 163 zfs_error_aux(hdl,
164 164 dgettext(TEXT_DOMAIN, "invalid character "
165 165 "'%c' in name"), what);
166 166 break;
167 167
168 168 case NAME_ERR_MULTIPLE_AT:
169 169 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
170 170 "multiple '@' delimiters in name"));
171 171 break;
172 172
173 173 case NAME_ERR_NOLETTER:
174 174 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
175 175 "pool doesn't begin with a letter"));
176 176 break;
177 177
178 178 case NAME_ERR_RESERVED:
179 179 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
180 180 "name is reserved"));
181 181 break;
182 182
183 183 case NAME_ERR_DISKLIKE:
184 184 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
185 185 "reserved disk name"));
186 186 break;
187 187 }
188 188 }
189 189
190 190 return (0);
191 191 }
192 192
193 193 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
194 194 if (hdl != NULL)
195 195 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
196 196 "snapshot delimiter '@' in filesystem name"));
197 197 return (0);
198 198 }
199 199
200 200 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
201 201 if (hdl != NULL)
202 202 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
203 203 "missing '@' delimiter in snapshot name"));
204 204 return (0);
205 205 }
206 206
207 207 if (modifying && strchr(path, '%') != NULL) {
208 208 if (hdl != NULL)
209 209 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
210 210 "invalid character %c in name"), '%');
211 211 return (0);
212 212 }
213 213
214 214 return (-1);
215 215 }
216 216
217 217 int
218 218 zfs_name_valid(const char *name, zfs_type_t type)
219 219 {
220 220 if (type == ZFS_TYPE_POOL)
221 221 return (zpool_name_valid(NULL, B_FALSE, name));
222 222 return (zfs_validate_name(NULL, name, type, B_FALSE));
223 223 }
224 224
225 225 /*
226 226 * This function takes the raw DSL properties, and filters out the user-defined
227 227 * properties into a separate nvlist.
228 228 */
229 229 static nvlist_t *
230 230 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
231 231 {
232 232 libzfs_handle_t *hdl = zhp->zfs_hdl;
233 233 nvpair_t *elem;
234 234 nvlist_t *propval;
235 235 nvlist_t *nvl;
236 236
237 237 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
238 238 (void) no_memory(hdl);
239 239 return (NULL);
240 240 }
241 241
242 242 elem = NULL;
243 243 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
244 244 if (!zfs_prop_user(nvpair_name(elem)))
245 245 continue;
246 246
247 247 verify(nvpair_value_nvlist(elem, &propval) == 0);
248 248 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
249 249 nvlist_free(nvl);
250 250 (void) no_memory(hdl);
251 251 return (NULL);
252 252 }
253 253 }
254 254
255 255 return (nvl);
256 256 }
257 257
258 258 static zpool_handle_t *
259 259 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
260 260 {
261 261 libzfs_handle_t *hdl = zhp->zfs_hdl;
262 262 zpool_handle_t *zph;
263 263
264 264 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
265 265 if (hdl->libzfs_pool_handles != NULL)
266 266 zph->zpool_next = hdl->libzfs_pool_handles;
267 267 hdl->libzfs_pool_handles = zph;
268 268 }
269 269 return (zph);
270 270 }
271 271
272 272 static zpool_handle_t *
273 273 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
274 274 {
275 275 libzfs_handle_t *hdl = zhp->zfs_hdl;
276 276 zpool_handle_t *zph = hdl->libzfs_pool_handles;
277 277
278 278 while ((zph != NULL) &&
279 279 (strncmp(pool_name, zpool_get_name(zph), len) != 0))
280 280 zph = zph->zpool_next;
281 281 return (zph);
282 282 }
283 283
284 284 /*
285 285 * Returns a handle to the pool that contains the provided dataset.
286 286 * If a handle to that pool already exists then that handle is returned.
287 287 * Otherwise, a new handle is created and added to the list of handles.
288 288 */
289 289 static zpool_handle_t *
290 290 zpool_handle(zfs_handle_t *zhp)
291 291 {
292 292 char *pool_name;
293 293 int len;
294 294 zpool_handle_t *zph;
295 295
296 296 len = strcspn(zhp->zfs_name, "/@") + 1;
297 297 pool_name = zfs_alloc(zhp->zfs_hdl, len);
298 298 (void) strlcpy(pool_name, zhp->zfs_name, len);
299 299
300 300 zph = zpool_find_handle(zhp, pool_name, len);
301 301 if (zph == NULL)
302 302 zph = zpool_add_handle(zhp, pool_name);
303 303
304 304 free(pool_name);
305 305 return (zph);
306 306 }
307 307
308 308 void
309 309 zpool_free_handles(libzfs_handle_t *hdl)
310 310 {
311 311 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
312 312
313 313 while (zph != NULL) {
314 314 next = zph->zpool_next;
315 315 zpool_close(zph);
316 316 zph = next;
317 317 }
318 318 hdl->libzfs_pool_handles = NULL;
319 319 }
320 320
321 321 /*
322 322 * Utility function to gather stats (objset and zpl) for the given object.
323 323 */
324 324 static int
325 325 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
326 326 {
327 327 libzfs_handle_t *hdl = zhp->zfs_hdl;
328 328
329 329 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
330 330
331 331 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
332 332 if (errno == ENOMEM) {
333 333 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
334 334 return (-1);
335 335 }
336 336 } else {
337 337 return (-1);
338 338 }
339 339 }
340 340 return (0);
341 341 }
342 342
343 343 /*
344 344 * Utility function to get the received properties of the given object.
345 345 */
346 346 static int
347 347 get_recvd_props_ioctl(zfs_handle_t *zhp)
348 348 {
349 349 libzfs_handle_t *hdl = zhp->zfs_hdl;
350 350 nvlist_t *recvdprops;
351 351 zfs_cmd_t zc = { 0 };
352 352 int err;
353 353
354 354 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
355 355 return (-1);
356 356
357 357 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
358 358
359 359 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
360 360 if (errno == ENOMEM) {
361 361 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
362 362 return (-1);
363 363 }
364 364 } else {
365 365 zcmd_free_nvlists(&zc);
366 366 return (-1);
367 367 }
368 368 }
369 369
370 370 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
371 371 zcmd_free_nvlists(&zc);
372 372 if (err != 0)
373 373 return (-1);
374 374
375 375 nvlist_free(zhp->zfs_recvd_props);
376 376 zhp->zfs_recvd_props = recvdprops;
377 377
378 378 return (0);
379 379 }
380 380
381 381 static int
382 382 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
383 383 {
384 384 nvlist_t *allprops, *userprops;
385 385
386 386 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
387 387
388 388 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
389 389 return (-1);
390 390 }
391 391
392 392 /*
393 393 * XXX Why do we store the user props separately, in addition to
394 394 * storing them in zfs_props?
395 395 */
396 396 if ((userprops = process_user_props(zhp, allprops)) == NULL) {
397 397 nvlist_free(allprops);
398 398 return (-1);
399 399 }
400 400
401 401 nvlist_free(zhp->zfs_props);
402 402 nvlist_free(zhp->zfs_user_props);
403 403
404 404 zhp->zfs_props = allprops;
405 405 zhp->zfs_user_props = userprops;
406 406
407 407 return (0);
408 408 }
409 409
410 410 static int
411 411 get_stats(zfs_handle_t *zhp)
412 412 {
413 413 int rc = 0;
414 414 zfs_cmd_t zc = { 0 };
415 415
416 416 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
417 417 return (-1);
418 418 if (get_stats_ioctl(zhp, &zc) != 0)
419 419 rc = -1;
420 420 else if (put_stats_zhdl(zhp, &zc) != 0)
421 421 rc = -1;
422 422 zcmd_free_nvlists(&zc);
423 423 return (rc);
424 424 }
425 425
426 426 /*
427 427 * Refresh the properties currently stored in the handle.
428 428 */
429 429 void
430 430 zfs_refresh_properties(zfs_handle_t *zhp)
431 431 {
432 432 (void) get_stats(zhp);
433 433 }
434 434
435 435 /*
436 436 * Makes a handle from the given dataset name. Used by zfs_open() and
437 437 * zfs_iter_* to create child handles on the fly.
438 438 */
439 439 static int
440 440 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
441 441 {
442 442 if (put_stats_zhdl(zhp, zc) != 0)
443 443 return (-1);
444 444
445 445 /*
446 446 * We've managed to open the dataset and gather statistics. Determine
447 447 * the high-level type.
448 448 */
449 449 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
450 450 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
451 451 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
452 452 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
453 453 else
454 454 abort();
455 455
456 456 if (zhp->zfs_dmustats.dds_is_snapshot)
457 457 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
458 458 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
459 459 zhp->zfs_type = ZFS_TYPE_VOLUME;
460 460 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
461 461 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
462 462 else
463 463 abort(); /* we should never see any other types */
464 464
465 465 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
466 466 return (-1);
467 467
468 468 return (0);
469 469 }
470 470
471 471 zfs_handle_t *
472 472 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
473 473 {
474 474 zfs_cmd_t zc = { 0 };
475 475
476 476 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
477 477
478 478 if (zhp == NULL)
479 479 return (NULL);
480 480
481 481 zhp->zfs_hdl = hdl;
482 482 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
483 483 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
484 484 free(zhp);
485 485 return (NULL);
486 486 }
487 487 if (get_stats_ioctl(zhp, &zc) == -1) {
488 488 zcmd_free_nvlists(&zc);
489 489 free(zhp);
490 490 return (NULL);
491 491 }
492 492 if (make_dataset_handle_common(zhp, &zc) == -1) {
493 493 free(zhp);
494 494 zhp = NULL;
495 495 }
496 496 zcmd_free_nvlists(&zc);
497 497 return (zhp);
498 498 }
499 499
500 500 zfs_handle_t *
501 501 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
502 502 {
503 503 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
504 504
505 505 if (zhp == NULL)
506 506 return (NULL);
507 507
508 508 zhp->zfs_hdl = hdl;
509 509 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
510 510 if (make_dataset_handle_common(zhp, zc) == -1) {
511 511 free(zhp);
512 512 return (NULL);
513 513 }
514 514 return (zhp);
515 515 }
516 516
517 517 zfs_handle_t *
518 518 zfs_handle_dup(zfs_handle_t *zhp_orig)
519 519 {
520 520 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
521 521
522 522 if (zhp == NULL)
523 523 return (NULL);
524 524
525 525 zhp->zfs_hdl = zhp_orig->zfs_hdl;
526 526 zhp->zpool_hdl = zhp_orig->zpool_hdl;
527 527 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
528 528 sizeof (zhp->zfs_name));
529 529 zhp->zfs_type = zhp_orig->zfs_type;
530 530 zhp->zfs_head_type = zhp_orig->zfs_head_type;
531 531 zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
532 532 if (zhp_orig->zfs_props != NULL) {
533 533 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
534 534 (void) no_memory(zhp->zfs_hdl);
535 535 zfs_close(zhp);
536 536 return (NULL);
537 537 }
538 538 }
539 539 if (zhp_orig->zfs_user_props != NULL) {
540 540 if (nvlist_dup(zhp_orig->zfs_user_props,
541 541 &zhp->zfs_user_props, 0) != 0) {
542 542 (void) no_memory(zhp->zfs_hdl);
543 543 zfs_close(zhp);
544 544 return (NULL);
545 545 }
546 546 }
547 547 if (zhp_orig->zfs_recvd_props != NULL) {
548 548 if (nvlist_dup(zhp_orig->zfs_recvd_props,
549 549 &zhp->zfs_recvd_props, 0)) {
550 550 (void) no_memory(zhp->zfs_hdl);
551 551 zfs_close(zhp);
552 552 return (NULL);
553 553 }
554 554 }
555 555 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
556 556 if (zhp_orig->zfs_mntopts != NULL) {
557 557 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
558 558 zhp_orig->zfs_mntopts);
559 559 }
560 560 zhp->zfs_props_table = zhp_orig->zfs_props_table;
561 561 return (zhp);
562 562 }
563 563
564 564 /*
565 565 * Opens the given snapshot, filesystem, or volume. The 'types'
566 566 * argument is a mask of acceptable types. The function will print an
567 567 * appropriate error message and return NULL if it can't be opened.
568 568 */
569 569 zfs_handle_t *
570 570 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
571 571 {
572 572 zfs_handle_t *zhp;
573 573 char errbuf[1024];
574 574
575 575 (void) snprintf(errbuf, sizeof (errbuf),
576 576 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
577 577
578 578 /*
579 579 * Validate the name before we even try to open it.
580 580 */
581 581 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
582 582 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
583 583 "invalid dataset name"));
584 584 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
585 585 return (NULL);
586 586 }
587 587
588 588 /*
589 589 * Try to get stats for the dataset, which will tell us if it exists.
590 590 */
591 591 errno = 0;
592 592 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
593 593 (void) zfs_standard_error(hdl, errno, errbuf);
594 594 return (NULL);
595 595 }
596 596
597 597 if (!(types & zhp->zfs_type)) {
598 598 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
599 599 zfs_close(zhp);
600 600 return (NULL);
601 601 }
602 602
603 603 return (zhp);
604 604 }
605 605
606 606 /*
607 607 * Release a ZFS handle. Nothing to do but free the associated memory.
608 608 */
609 609 void
610 610 zfs_close(zfs_handle_t *zhp)
611 611 {
612 612 if (zhp->zfs_mntopts)
613 613 free(zhp->zfs_mntopts);
614 614 nvlist_free(zhp->zfs_props);
615 615 nvlist_free(zhp->zfs_user_props);
616 616 nvlist_free(zhp->zfs_recvd_props);
617 617 free(zhp);
618 618 }
619 619
620 620 typedef struct mnttab_node {
621 621 struct mnttab mtn_mt;
622 622 avl_node_t mtn_node;
623 623 } mnttab_node_t;
624 624
625 625 static int
626 626 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
627 627 {
628 628 const mnttab_node_t *mtn1 = arg1;
629 629 const mnttab_node_t *mtn2 = arg2;
630 630 int rv;
631 631
632 632 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
633 633
634 634 if (rv == 0)
635 635 return (0);
636 636 return (rv > 0 ? 1 : -1);
637 637 }
638 638
639 639 void
640 640 libzfs_mnttab_init(libzfs_handle_t *hdl)
641 641 {
642 642 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
643 643 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
644 644 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
645 645 }
646 646
647 647 void
648 648 libzfs_mnttab_update(libzfs_handle_t *hdl)
649 649 {
650 650 struct mnttab entry;
651 651
652 652 rewind(hdl->libzfs_mnttab);
653 653 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
654 654 mnttab_node_t *mtn;
655 655
656 656 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
657 657 continue;
658 658 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
659 659 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
660 660 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
661 661 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
662 662 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
663 663 avl_add(&hdl->libzfs_mnttab_cache, mtn);
664 664 }
665 665 }
666 666
667 667 void
668 668 libzfs_mnttab_fini(libzfs_handle_t *hdl)
669 669 {
670 670 void *cookie = NULL;
671 671 mnttab_node_t *mtn;
672 672
673 673 while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) {
674 674 free(mtn->mtn_mt.mnt_special);
675 675 free(mtn->mtn_mt.mnt_mountp);
676 676 free(mtn->mtn_mt.mnt_fstype);
677 677 free(mtn->mtn_mt.mnt_mntopts);
678 678 free(mtn);
679 679 }
680 680 avl_destroy(&hdl->libzfs_mnttab_cache);
681 681 }
682 682
683 683 void
684 684 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
685 685 {
686 686 hdl->libzfs_mnttab_enable = enable;
687 687 }
688 688
689 689 int
690 690 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
691 691 struct mnttab *entry)
692 692 {
693 693 mnttab_node_t find;
694 694 mnttab_node_t *mtn;
695 695
696 696 if (!hdl->libzfs_mnttab_enable) {
697 697 struct mnttab srch = { 0 };
698 698
699 699 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
700 700 libzfs_mnttab_fini(hdl);
701 701 rewind(hdl->libzfs_mnttab);
702 702 srch.mnt_special = (char *)fsname;
703 703 srch.mnt_fstype = MNTTYPE_ZFS;
704 704 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
705 705 return (0);
706 706 else
707 707 return (ENOENT);
708 708 }
709 709
710 710 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
711 711 libzfs_mnttab_update(hdl);
712 712
713 713 find.mtn_mt.mnt_special = (char *)fsname;
714 714 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
715 715 if (mtn) {
716 716 *entry = mtn->mtn_mt;
717 717 return (0);
718 718 }
719 719 return (ENOENT);
720 720 }
721 721
722 722 void
723 723 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
724 724 const char *mountp, const char *mntopts)
725 725 {
726 726 mnttab_node_t *mtn;
727 727
728 728 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
729 729 return;
730 730 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
731 731 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
732 732 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
733 733 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
734 734 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
735 735 avl_add(&hdl->libzfs_mnttab_cache, mtn);
736 736 }
737 737
738 738 void
739 739 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
740 740 {
741 741 mnttab_node_t find;
742 742 mnttab_node_t *ret;
743 743
744 744 find.mtn_mt.mnt_special = (char *)fsname;
745 745 if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) {
746 746 avl_remove(&hdl->libzfs_mnttab_cache, ret);
747 747 free(ret->mtn_mt.mnt_special);
748 748 free(ret->mtn_mt.mnt_mountp);
749 749 free(ret->mtn_mt.mnt_fstype);
750 750 free(ret->mtn_mt.mnt_mntopts);
751 751 free(ret);
752 752 }
753 753 }
754 754
755 755 int
756 756 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
757 757 {
758 758 zpool_handle_t *zpool_handle = zhp->zpool_hdl;
759 759
760 760 if (zpool_handle == NULL)
761 761 return (-1);
762 762
763 763 *spa_version = zpool_get_prop_int(zpool_handle,
764 764 ZPOOL_PROP_VERSION, NULL);
765 765 return (0);
766 766 }
767 767
768 768 /*
769 769 * The choice of reservation property depends on the SPA version.
770 770 */
771 771 static int
772 772 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
773 773 {
774 774 int spa_version;
775 775
776 776 if (zfs_spa_version(zhp, &spa_version) < 0)
777 777 return (-1);
778 778
779 779 if (spa_version >= SPA_VERSION_REFRESERVATION)
780 780 *resv_prop = ZFS_PROP_REFRESERVATION;
781 781 else
782 782 *resv_prop = ZFS_PROP_RESERVATION;
783 783
784 784 return (0);
785 785 }
786 786
787 787 /*
788 788 * Given an nvlist of properties to set, validates that they are correct, and
789 789 * parses any numeric properties (index, boolean, etc) if they are specified as
790 790 * strings.
791 791 */
792 792 nvlist_t *
793 793 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
794 794 uint64_t zoned, zfs_handle_t *zhp, const char *errbuf)
795 795 {
796 796 nvpair_t *elem;
797 797 uint64_t intval;
798 798 char *strval;
799 799 zfs_prop_t prop;
800 800 nvlist_t *ret;
801 801 int chosen_normal = -1;
802 802 int chosen_utf = -1;
803 803
804 804 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
805 805 (void) no_memory(hdl);
806 806 return (NULL);
807 807 }
808 808
809 809 /*
810 810 * Make sure this property is valid and applies to this type.
811 811 */
812 812
813 813 elem = NULL;
814 814 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
815 815 const char *propname = nvpair_name(elem);
816 816
817 817 prop = zfs_name_to_prop(propname);
818 818 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
819 819 /*
820 820 * This is a user property: make sure it's a
821 821 * string, and that it's less than ZAP_MAXNAMELEN.
822 822 */
823 823 if (nvpair_type(elem) != DATA_TYPE_STRING) {
824 824 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
825 825 "'%s' must be a string"), propname);
826 826 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
827 827 goto error;
828 828 }
829 829
830 830 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
831 831 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
832 832 "property name '%s' is too long"),
833 833 propname);
834 834 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
835 835 goto error;
836 836 }
837 837
838 838 (void) nvpair_value_string(elem, &strval);
839 839 if (nvlist_add_string(ret, propname, strval) != 0) {
840 840 (void) no_memory(hdl);
841 841 goto error;
842 842 }
843 843 continue;
844 844 }
845 845
846 846 /*
847 847 * Currently, only user properties can be modified on
848 848 * snapshots.
849 849 */
850 850 if (type == ZFS_TYPE_SNAPSHOT) {
851 851 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
852 852 "this property can not be modified for snapshots"));
853 853 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
854 854 goto error;
855 855 }
856 856
857 857 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
858 858 zfs_userquota_prop_t uqtype;
859 859 char newpropname[128];
860 860 char domain[128];
861 861 uint64_t rid;
862 862 uint64_t valary[3];
863 863
864 864 if (userquota_propname_decode(propname, zoned,
865 865 &uqtype, domain, sizeof (domain), &rid) != 0) {
866 866 zfs_error_aux(hdl,
867 867 dgettext(TEXT_DOMAIN,
868 868 "'%s' has an invalid user/group name"),
869 869 propname);
870 870 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
871 871 goto error;
872 872 }
873 873
874 874 if (uqtype != ZFS_PROP_USERQUOTA &&
875 875 uqtype != ZFS_PROP_GROUPQUOTA) {
876 876 zfs_error_aux(hdl,
877 877 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
878 878 propname);
879 879 (void) zfs_error(hdl, EZFS_PROPREADONLY,
880 880 errbuf);
881 881 goto error;
882 882 }
883 883
884 884 if (nvpair_type(elem) == DATA_TYPE_STRING) {
885 885 (void) nvpair_value_string(elem, &strval);
886 886 if (strcmp(strval, "none") == 0) {
887 887 intval = 0;
888 888 } else if (zfs_nicestrtonum(hdl,
889 889 strval, &intval) != 0) {
890 890 (void) zfs_error(hdl,
891 891 EZFS_BADPROP, errbuf);
892 892 goto error;
893 893 }
894 894 } else if (nvpair_type(elem) ==
895 895 DATA_TYPE_UINT64) {
896 896 (void) nvpair_value_uint64(elem, &intval);
897 897 if (intval == 0) {
898 898 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
899 899 "use 'none' to disable "
900 900 "userquota/groupquota"));
901 901 goto error;
902 902 }
903 903 } else {
904 904 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
905 905 "'%s' must be a number"), propname);
906 906 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
907 907 goto error;
908 908 }
909 909
910 910 /*
911 911 * Encode the prop name as
912 912 * userquota@<hex-rid>-domain, to make it easy
913 913 * for the kernel to decode.
914 914 */
915 915 (void) snprintf(newpropname, sizeof (newpropname),
916 916 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
917 917 (longlong_t)rid, domain);
918 918 valary[0] = uqtype;
919 919 valary[1] = rid;
920 920 valary[2] = intval;
921 921 if (nvlist_add_uint64_array(ret, newpropname,
922 922 valary, 3) != 0) {
923 923 (void) no_memory(hdl);
924 924 goto error;
925 925 }
926 926 continue;
927 927 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
928 928 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
929 929 "'%s' is readonly"),
930 930 propname);
931 931 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
932 932 goto error;
933 933 }
934 934
935 935 if (prop == ZPROP_INVAL) {
936 936 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
937 937 "invalid property '%s'"), propname);
938 938 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
939 939 goto error;
940 940 }
941 941
942 942 if (!zfs_prop_valid_for_type(prop, type)) {
943 943 zfs_error_aux(hdl,
944 944 dgettext(TEXT_DOMAIN, "'%s' does not "
945 945 "apply to datasets of this type"), propname);
946 946 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
947 947 goto error;
948 948 }
949 949
950 950 if (zfs_prop_readonly(prop) &&
951 951 (!zfs_prop_setonce(prop) || zhp != NULL)) {
952 952 zfs_error_aux(hdl,
953 953 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
954 954 propname);
955 955 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
956 956 goto error;
957 957 }
958 958
959 959 if (zprop_parse_value(hdl, elem, prop, type, ret,
960 960 &strval, &intval, errbuf) != 0)
961 961 goto error;
962 962
963 963 /*
964 964 * Perform some additional checks for specific properties.
965 965 */
966 966 switch (prop) {
967 967 case ZFS_PROP_VERSION:
968 968 {
969 969 int version;
970 970
971 971 if (zhp == NULL)
972 972 break;
973 973 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
974 974 if (intval < version) {
975 975 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
976 976 "Can not downgrade; already at version %u"),
977 977 version);
978 978 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
979 979 goto error;
980 980 }
981 981 break;
982 982 }
983 983
984 984 case ZFS_PROP_RECORDSIZE:
985 985 case ZFS_PROP_VOLBLOCKSIZE:
986 986 /* must be power of two within SPA_{MIN,MAX}BLOCKSIZE */
987 987 if (intval < SPA_MINBLOCKSIZE ||
988 988 intval > SPA_MAXBLOCKSIZE || !ISP2(intval)) {
989 989 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
990 990 "'%s' must be power of 2 from %u "
991 991 "to %uk"), propname,
992 992 (uint_t)SPA_MINBLOCKSIZE,
993 993 (uint_t)SPA_MAXBLOCKSIZE >> 10);
994 994 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
995 995 goto error;
996 996 }
997 997 break;
998 998
999 999 case ZFS_PROP_MLSLABEL:
1000 1000 {
1001 1001 /*
1002 1002 * Verify the mlslabel string and convert to
1003 1003 * internal hex label string.
1004 1004 */
1005 1005
1006 1006 m_label_t *new_sl;
1007 1007 char *hex = NULL; /* internal label string */
1008 1008
1009 1009 /* Default value is already OK. */
1010 1010 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1011 1011 break;
1012 1012
1013 1013 /* Verify the label can be converted to binary form */
1014 1014 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1015 1015 (str_to_label(strval, &new_sl, MAC_LABEL,
1016 1016 L_NO_CORRECTION, NULL) == -1)) {
1017 1017 goto badlabel;
1018 1018 }
1019 1019
1020 1020 /* Now translate to hex internal label string */
1021 1021 if (label_to_str(new_sl, &hex, M_INTERNAL,
1022 1022 DEF_NAMES) != 0) {
1023 1023 if (hex)
1024 1024 free(hex);
1025 1025 goto badlabel;
1026 1026 }
1027 1027 m_label_free(new_sl);
1028 1028
1029 1029 /* If string is already in internal form, we're done. */
1030 1030 if (strcmp(strval, hex) == 0) {
1031 1031 free(hex);
1032 1032 break;
1033 1033 }
1034 1034
1035 1035 /* Replace the label string with the internal form. */
1036 1036 (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1037 1037 DATA_TYPE_STRING);
1038 1038 verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1039 1039 hex) == 0);
1040 1040 free(hex);
1041 1041
1042 1042 break;
1043 1043
1044 1044 badlabel:
1045 1045 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1046 1046 "invalid mlslabel '%s'"), strval);
1047 1047 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1048 1048 m_label_free(new_sl); /* OK if null */
1049 1049 goto error;
1050 1050
1051 1051 }
1052 1052
1053 1053 case ZFS_PROP_MOUNTPOINT:
1054 1054 {
1055 1055 namecheck_err_t why;
1056 1056
1057 1057 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1058 1058 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1059 1059 break;
1060 1060
1061 1061 if (mountpoint_namecheck(strval, &why)) {
1062 1062 switch (why) {
1063 1063 case NAME_ERR_LEADING_SLASH:
1064 1064 zfs_error_aux(hdl,
1065 1065 dgettext(TEXT_DOMAIN,
1066 1066 "'%s' must be an absolute path, "
1067 1067 "'none', or 'legacy'"), propname);
1068 1068 break;
1069 1069 case NAME_ERR_TOOLONG:
1070 1070 zfs_error_aux(hdl,
1071 1071 dgettext(TEXT_DOMAIN,
1072 1072 "component of '%s' is too long"),
1073 1073 propname);
1074 1074 break;
1075 1075 }
1076 1076 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1077 1077 goto error;
1078 1078 }
1079 1079 }
1080 1080
1081 1081 /*FALLTHRU*/
1082 1082
1083 1083 case ZFS_PROP_SHARESMB:
1084 1084 case ZFS_PROP_SHARENFS:
1085 1085 /*
1086 1086 * For the mountpoint and sharenfs or sharesmb
1087 1087 * properties, check if it can be set in a
1088 1088 * global/non-global zone based on
1089 1089 * the zoned property value:
1090 1090 *
1091 1091 * global zone non-global zone
1092 1092 * --------------------------------------------------
1093 1093 * zoned=on mountpoint (no) mountpoint (yes)
1094 1094 * sharenfs (no) sharenfs (no)
1095 1095 * sharesmb (no) sharesmb (no)
1096 1096 *
1097 1097 * zoned=off mountpoint (yes) N/A
1098 1098 * sharenfs (yes)
1099 1099 * sharesmb (yes)
1100 1100 */
1101 1101 if (zoned) {
1102 1102 if (getzoneid() == GLOBAL_ZONEID) {
1103 1103 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1104 1104 "'%s' cannot be set on "
1105 1105 "dataset in a non-global zone"),
1106 1106 propname);
1107 1107 (void) zfs_error(hdl, EZFS_ZONED,
1108 1108 errbuf);
1109 1109 goto error;
1110 1110 } else if (prop == ZFS_PROP_SHARENFS ||
1111 1111 prop == ZFS_PROP_SHARESMB) {
1112 1112 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1113 1113 "'%s' cannot be set in "
1114 1114 "a non-global zone"), propname);
1115 1115 (void) zfs_error(hdl, EZFS_ZONED,
1116 1116 errbuf);
1117 1117 goto error;
1118 1118 }
1119 1119 } else if (getzoneid() != GLOBAL_ZONEID) {
1120 1120 /*
1121 1121 * If zoned property is 'off', this must be in
1122 1122 * a global zone. If not, something is wrong.
1123 1123 */
1124 1124 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1125 1125 "'%s' cannot be set while dataset "
1126 1126 "'zoned' property is set"), propname);
1127 1127 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1128 1128 goto error;
1129 1129 }
1130 1130
1131 1131 /*
1132 1132 * At this point, it is legitimate to set the
1133 1133 * property. Now we want to make sure that the
1134 1134 * property value is valid if it is sharenfs.
1135 1135 */
1136 1136 if ((prop == ZFS_PROP_SHARENFS ||
1137 1137 prop == ZFS_PROP_SHARESMB) &&
1138 1138 strcmp(strval, "on") != 0 &&
1139 1139 strcmp(strval, "off") != 0) {
1140 1140 zfs_share_proto_t proto;
1141 1141
1142 1142 if (prop == ZFS_PROP_SHARESMB)
1143 1143 proto = PROTO_SMB;
1144 1144 else
1145 1145 proto = PROTO_NFS;
1146 1146
1147 1147 /*
1148 1148 * Must be an valid sharing protocol
1149 1149 * option string so init the libshare
1150 1150 * in order to enable the parser and
1151 1151 * then parse the options. We use the
1152 1152 * control API since we don't care about
1153 1153 * the current configuration and don't
1154 1154 * want the overhead of loading it
1155 1155 * until we actually do something.
1156 1156 */
1157 1157
1158 1158 if (zfs_init_libshare(hdl,
1159 1159 SA_INIT_CONTROL_API) != SA_OK) {
1160 1160 /*
1161 1161 * An error occurred so we can't do
1162 1162 * anything
1163 1163 */
1164 1164 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1165 1165 "'%s' cannot be set: problem "
1166 1166 "in share initialization"),
1167 1167 propname);
1168 1168 (void) zfs_error(hdl, EZFS_BADPROP,
1169 1169 errbuf);
1170 1170 goto error;
1171 1171 }
1172 1172
1173 1173 if (zfs_parse_options(strval, proto) != SA_OK) {
1174 1174 /*
1175 1175 * There was an error in parsing so
1176 1176 * deal with it by issuing an error
1177 1177 * message and leaving after
1178 1178 * uninitializing the the libshare
1179 1179 * interface.
1180 1180 */
1181 1181 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1182 1182 "'%s' cannot be set to invalid "
1183 1183 "options"), propname);
1184 1184 (void) zfs_error(hdl, EZFS_BADPROP,
1185 1185 errbuf);
1186 1186 zfs_uninit_libshare(hdl);
1187 1187 goto error;
1188 1188 }
1189 1189 zfs_uninit_libshare(hdl);
1190 1190 }
1191 1191
1192 1192 break;
1193 1193 case ZFS_PROP_UTF8ONLY:
1194 1194 chosen_utf = (int)intval;
1195 1195 break;
1196 1196 case ZFS_PROP_NORMALIZE:
1197 1197 chosen_normal = (int)intval;
1198 1198 break;
1199 1199 }
1200 1200
1201 1201 /*
1202 1202 * For changes to existing volumes, we have some additional
1203 1203 * checks to enforce.
1204 1204 */
1205 1205 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1206 1206 uint64_t volsize = zfs_prop_get_int(zhp,
1207 1207 ZFS_PROP_VOLSIZE);
1208 1208 uint64_t blocksize = zfs_prop_get_int(zhp,
1209 1209 ZFS_PROP_VOLBLOCKSIZE);
1210 1210 char buf[64];
1211 1211
1212 1212 switch (prop) {
1213 1213 case ZFS_PROP_RESERVATION:
1214 1214 case ZFS_PROP_REFRESERVATION:
1215 1215 if (intval > volsize) {
1216 1216 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1217 1217 "'%s' is greater than current "
1218 1218 "volume size"), propname);
1219 1219 (void) zfs_error(hdl, EZFS_BADPROP,
1220 1220 errbuf);
1221 1221 goto error;
1222 1222 }
1223 1223 break;
1224 1224
1225 1225 case ZFS_PROP_VOLSIZE:
1226 1226 if (intval % blocksize != 0) {
1227 1227 zfs_nicenum(blocksize, buf,
1228 1228 sizeof (buf));
1229 1229 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1230 1230 "'%s' must be a multiple of "
1231 1231 "volume block size (%s)"),
1232 1232 propname, buf);
1233 1233 (void) zfs_error(hdl, EZFS_BADPROP,
1234 1234 errbuf);
1235 1235 goto error;
1236 1236 }
1237 1237
1238 1238 if (intval == 0) {
1239 1239 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1240 1240 "'%s' cannot be zero"),
1241 1241 propname);
1242 1242 (void) zfs_error(hdl, EZFS_BADPROP,
1243 1243 errbuf);
1244 1244 goto error;
1245 1245 }
1246 1246 break;
1247 1247 }
1248 1248 }
1249 1249 }
1250 1250
1251 1251 /*
1252 1252 * If normalization was chosen, but no UTF8 choice was made,
1253 1253 * enforce rejection of non-UTF8 names.
1254 1254 *
1255 1255 * If normalization was chosen, but rejecting non-UTF8 names
1256 1256 * was explicitly not chosen, it is an error.
1257 1257 */
1258 1258 if (chosen_normal > 0 && chosen_utf < 0) {
1259 1259 if (nvlist_add_uint64(ret,
1260 1260 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1261 1261 (void) no_memory(hdl);
1262 1262 goto error;
1263 1263 }
1264 1264 } else if (chosen_normal > 0 && chosen_utf == 0) {
1265 1265 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1266 1266 "'%s' must be set 'on' if normalization chosen"),
1267 1267 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1268 1268 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1269 1269 goto error;
1270 1270 }
1271 1271 return (ret);
1272 1272
1273 1273 error:
1274 1274 nvlist_free(ret);
1275 1275 return (NULL);
1276 1276 }
1277 1277
1278 1278 int
1279 1279 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1280 1280 {
1281 1281 uint64_t old_volsize;
1282 1282 uint64_t new_volsize;
1283 1283 uint64_t old_reservation;
1284 1284 uint64_t new_reservation;
1285 1285 zfs_prop_t resv_prop;
1286 1286 nvlist_t *props;
1287 1287
1288 1288 /*
1289 1289 * If this is an existing volume, and someone is setting the volsize,
1290 1290 * make sure that it matches the reservation, or add it if necessary.
1291 1291 */
1292 1292 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1293 1293 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1294 1294 return (-1);
1295 1295 old_reservation = zfs_prop_get_int(zhp, resv_prop);
1296 1296
1297 1297 props = fnvlist_alloc();
1298 1298 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1299 1299 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1300 1300
1301 1301 if ((zvol_volsize_to_reservation(old_volsize, props) !=
1302 1302 old_reservation) || nvlist_exists(nvl,
1303 1303 zfs_prop_to_name(resv_prop))) {
1304 1304 fnvlist_free(props);
1305 1305 return (0);
1306 1306 }
1307 1307 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1308 1308 &new_volsize) != 0) {
1309 1309 fnvlist_free(props);
1310 1310 return (-1);
1311 1311 }
1312 1312 new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1313 1313 fnvlist_free(props);
1314 1314
1315 1315 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1316 1316 new_reservation) != 0) {
1317 1317 (void) no_memory(zhp->zfs_hdl);
1318 1318 return (-1);
1319 1319 }
1320 1320 return (1);
1321 1321 }
1322 1322
1323 1323 void
1324 1324 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1325 1325 char *errbuf)
1326 1326 {
1327 1327 switch (err) {
1328 1328
1329 1329 case ENOSPC:
1330 1330 /*
1331 1331 * For quotas and reservations, ENOSPC indicates
1332 1332 * something different; setting a quota or reservation
1333 1333 * doesn't use any disk space.
1334 1334 */
1335 1335 switch (prop) {
1336 1336 case ZFS_PROP_QUOTA:
1337 1337 case ZFS_PROP_REFQUOTA:
1338 1338 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1339 1339 "size is less than current used or "
1340 1340 "reserved space"));
1341 1341 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1342 1342 break;
1343 1343
1344 1344 case ZFS_PROP_RESERVATION:
1345 1345 case ZFS_PROP_REFRESERVATION:
1346 1346 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1347 1347 "size is greater than available space"));
1348 1348 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1349 1349 break;
1350 1350
1351 1351 default:
1352 1352 (void) zfs_standard_error(hdl, err, errbuf);
1353 1353 break;
1354 1354 }
1355 1355 break;
1356 1356
1357 1357 case EBUSY:
1358 1358 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1359 1359 break;
1360 1360
1361 1361 case EROFS:
1362 1362 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1363 1363 break;
1364 1364
1365 1365 case ENOTSUP:
1366 1366 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1367 1367 "pool and or dataset must be upgraded to set this "
1368 1368 "property or value"));
1369 1369 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1370 1370 break;
1371 1371
1372 1372 case ERANGE:
1373 1373 if (prop == ZFS_PROP_COMPRESSION) {
1374 1374 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1375 1375 "property setting is not allowed on "
1376 1376 "bootable datasets"));
1377 1377 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1378 1378 } else {
1379 1379 (void) zfs_standard_error(hdl, err, errbuf);
1380 1380 }
1381 1381 break;
1382 1382
1383 1383 case EINVAL:
1384 1384 if (prop == ZPROP_INVAL) {
1385 1385 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1386 1386 } else {
1387 1387 (void) zfs_standard_error(hdl, err, errbuf);
1388 1388 }
1389 1389 break;
1390 1390
1391 1391 case EOVERFLOW:
1392 1392 /*
1393 1393 * This platform can't address a volume this big.
1394 1394 */
1395 1395 #ifdef _ILP32
1396 1396 if (prop == ZFS_PROP_VOLSIZE) {
1397 1397 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1398 1398 break;
1399 1399 }
1400 1400 #endif
1401 1401 /* FALLTHROUGH */
1402 1402 default:
1403 1403 (void) zfs_standard_error(hdl, err, errbuf);
1404 1404 }
1405 1405 }
1406 1406
1407 1407 /*
1408 1408 * Given a property name and value, set the property for the given dataset.
1409 1409 */
1410 1410 int
1411 1411 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1412 1412 {
1413 1413 zfs_cmd_t zc = { 0 };
1414 1414 int ret = -1;
1415 1415 prop_changelist_t *cl = NULL;
1416 1416 char errbuf[1024];
1417 1417 libzfs_handle_t *hdl = zhp->zfs_hdl;
1418 1418 nvlist_t *nvl = NULL, *realprops;
1419 1419 zfs_prop_t prop;
1420 1420 boolean_t do_prefix = B_TRUE;
1421 1421 int added_resv;
1422 1422
1423 1423 (void) snprintf(errbuf, sizeof (errbuf),
1424 1424 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1425 1425 zhp->zfs_name);
1426 1426
1427 1427 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1428 1428 nvlist_add_string(nvl, propname, propval) != 0) {
1429 1429 (void) no_memory(hdl);
1430 1430 goto error;
1431 1431 }
1432 1432
1433 1433 if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl,
1434 1434 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
1435 1435 goto error;
1436 1436
1437 1437 nvlist_free(nvl);
1438 1438 nvl = realprops;
1439 1439
1440 1440 prop = zfs_name_to_prop(propname);
1441 1441
1442 1442 if (prop == ZFS_PROP_VOLSIZE) {
1443 1443 if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1)
1444 1444 goto error;
1445 1445 }
1446 1446
1447 1447 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1448 1448 goto error;
1449 1449
1450 1450 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1451 1451 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1452 1452 "child dataset with inherited mountpoint is used "
1453 1453 "in a non-global zone"));
1454 1454 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1455 1455 goto error;
1456 1456 }
1457 1457
1458 1458 /*
1459 1459 * We don't want to unmount & remount the dataset when changing
1460 1460 * its canmount property to 'on' or 'noauto'. We only use
1461 1461 * the changelist logic to unmount when setting canmount=off.
1462 1462 */
1463 1463 if (prop == ZFS_PROP_CANMOUNT) {
1464 1464 uint64_t idx;
1465 1465 int err = zprop_string_to_index(prop, propval, &idx,
1466 1466 ZFS_TYPE_DATASET);
1467 1467 if (err == 0 && idx != ZFS_CANMOUNT_OFF)
1468 1468 do_prefix = B_FALSE;
1469 1469 }
1470 1470
1471 1471 if (do_prefix && (ret = changelist_prefix(cl)) != 0)
1472 1472 goto error;
1473 1473
1474 1474 /*
1475 1475 * Execute the corresponding ioctl() to set this property.
1476 1476 */
1477 1477 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1478 1478
1479 1479 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1480 1480 goto error;
1481 1481
1482 1482 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1483 1483
1484 1484 if (ret != 0) {
1485 1485 zfs_setprop_error(hdl, prop, errno, errbuf);
1486 1486 if (added_resv && errno == ENOSPC) {
1487 1487 /* clean up the volsize property we tried to set */
1488 1488 uint64_t old_volsize = zfs_prop_get_int(zhp,
1489 1489 ZFS_PROP_VOLSIZE);
1490 1490 nvlist_free(nvl);
1491 1491 zcmd_free_nvlists(&zc);
1492 1492 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1493 1493 goto error;
1494 1494 if (nvlist_add_uint64(nvl,
1495 1495 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1496 1496 old_volsize) != 0)
1497 1497 goto error;
1498 1498 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1499 1499 goto error;
1500 1500 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1501 1501 }
1502 1502 } else {
1503 1503 if (do_prefix)
1504 1504 ret = changelist_postfix(cl);
1505 1505
1506 1506 /*
1507 1507 * Refresh the statistics so the new property value
1508 1508 * is reflected.
1509 1509 */
1510 1510 if (ret == 0)
1511 1511 (void) get_stats(zhp);
1512 1512 }
1513 1513
1514 1514 error:
1515 1515 nvlist_free(nvl);
1516 1516 zcmd_free_nvlists(&zc);
1517 1517 if (cl)
1518 1518 changelist_free(cl);
1519 1519 return (ret);
1520 1520 }
1521 1521
1522 1522 /*
1523 1523 * Given a property, inherit the value from the parent dataset, or if received
1524 1524 * is TRUE, revert to the received value, if any.
1525 1525 */
1526 1526 int
1527 1527 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1528 1528 {
1529 1529 zfs_cmd_t zc = { 0 };
1530 1530 int ret;
1531 1531 prop_changelist_t *cl;
1532 1532 libzfs_handle_t *hdl = zhp->zfs_hdl;
1533 1533 char errbuf[1024];
1534 1534 zfs_prop_t prop;
1535 1535
1536 1536 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1537 1537 "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1538 1538
1539 1539 zc.zc_cookie = received;
1540 1540 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1541 1541 /*
1542 1542 * For user properties, the amount of work we have to do is very
1543 1543 * small, so just do it here.
1544 1544 */
1545 1545 if (!zfs_prop_user(propname)) {
1546 1546 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1547 1547 "invalid property"));
1548 1548 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1549 1549 }
1550 1550
1551 1551 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1552 1552 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1553 1553
1554 1554 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1555 1555 return (zfs_standard_error(hdl, errno, errbuf));
1556 1556
1557 1557 return (0);
1558 1558 }
1559 1559
1560 1560 /*
1561 1561 * Verify that this property is inheritable.
1562 1562 */
1563 1563 if (zfs_prop_readonly(prop))
1564 1564 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1565 1565
1566 1566 if (!zfs_prop_inheritable(prop) && !received)
1567 1567 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1568 1568
1569 1569 /*
1570 1570 * Check to see if the value applies to this type
1571 1571 */
1572 1572 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1573 1573 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1574 1574
1575 1575 /*
1576 1576 * Normalize the name, to get rid of shorthand abbreviations.
1577 1577 */
1578 1578 propname = zfs_prop_to_name(prop);
1579 1579 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1580 1580 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1581 1581
1582 1582 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1583 1583 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1584 1584 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1585 1585 "dataset is used in a non-global zone"));
1586 1586 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1587 1587 }
1588 1588
1589 1589 /*
1590 1590 * Determine datasets which will be affected by this change, if any.
1591 1591 */
1592 1592 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1593 1593 return (-1);
1594 1594
1595 1595 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1596 1596 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1597 1597 "child dataset with inherited mountpoint is used "
1598 1598 "in a non-global zone"));
1599 1599 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1600 1600 goto error;
1601 1601 }
1602 1602
1603 1603 if ((ret = changelist_prefix(cl)) != 0)
1604 1604 goto error;
1605 1605
1606 1606 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1607 1607 return (zfs_standard_error(hdl, errno, errbuf));
1608 1608 } else {
1609 1609
1610 1610 if ((ret = changelist_postfix(cl)) != 0)
1611 1611 goto error;
1612 1612
1613 1613 /*
1614 1614 * Refresh the statistics so the new property is reflected.
1615 1615 */
1616 1616 (void) get_stats(zhp);
1617 1617 }
1618 1618
1619 1619 error:
1620 1620 changelist_free(cl);
1621 1621 return (ret);
1622 1622 }
1623 1623
1624 1624 /*
1625 1625 * True DSL properties are stored in an nvlist. The following two functions
1626 1626 * extract them appropriately.
1627 1627 */
1628 1628 static uint64_t
1629 1629 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1630 1630 {
1631 1631 nvlist_t *nv;
1632 1632 uint64_t value;
1633 1633
1634 1634 *source = NULL;
1635 1635 if (nvlist_lookup_nvlist(zhp->zfs_props,
1636 1636 zfs_prop_to_name(prop), &nv) == 0) {
1637 1637 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1638 1638 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1639 1639 } else {
1640 1640 verify(!zhp->zfs_props_table ||
1641 1641 zhp->zfs_props_table[prop] == B_TRUE);
1642 1642 value = zfs_prop_default_numeric(prop);
1643 1643 *source = "";
1644 1644 }
1645 1645
1646 1646 return (value);
1647 1647 }
1648 1648
1649 1649 static char *
1650 1650 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1651 1651 {
1652 1652 nvlist_t *nv;
1653 1653 char *value;
1654 1654
1655 1655 *source = NULL;
1656 1656 if (nvlist_lookup_nvlist(zhp->zfs_props,
1657 1657 zfs_prop_to_name(prop), &nv) == 0) {
1658 1658 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
1659 1659 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1660 1660 } else {
1661 1661 verify(!zhp->zfs_props_table ||
1662 1662 zhp->zfs_props_table[prop] == B_TRUE);
1663 1663 if ((value = (char *)zfs_prop_default_string(prop)) == NULL)
1664 1664 value = "";
1665 1665 *source = "";
1666 1666 }
1667 1667
1668 1668 return (value);
1669 1669 }
1670 1670
1671 1671 static boolean_t
1672 1672 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1673 1673 {
1674 1674 return (zhp->zfs_props == zhp->zfs_recvd_props);
1675 1675 }
1676 1676
1677 1677 static void
1678 1678 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1679 1679 {
1680 1680 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1681 1681 zhp->zfs_props = zhp->zfs_recvd_props;
1682 1682 }
1683 1683
1684 1684 static void
1685 1685 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1686 1686 {
1687 1687 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1688 1688 *cookie = 0;
1689 1689 }
1690 1690
1691 1691 /*
1692 1692 * Internal function for getting a numeric property. Both zfs_prop_get() and
1693 1693 * zfs_prop_get_int() are built using this interface.
1694 1694 *
1695 1695 * Certain properties can be overridden using 'mount -o'. In this case, scan
1696 1696 * the contents of the /etc/mnttab entry, searching for the appropriate options.
1697 1697 * If they differ from the on-disk values, report the current values and mark
1698 1698 * the source "temporary".
1699 1699 */
1700 1700 static int
1701 1701 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1702 1702 char **source, uint64_t *val)
1703 1703 {
1704 1704 zfs_cmd_t zc = { 0 };
1705 1705 nvlist_t *zplprops = NULL;
1706 1706 struct mnttab mnt;
1707 1707 char *mntopt_on = NULL;
1708 1708 char *mntopt_off = NULL;
1709 1709 boolean_t received = zfs_is_recvd_props_mode(zhp);
1710 1710
1711 1711 *source = NULL;
1712 1712
1713 1713 switch (prop) {
1714 1714 case ZFS_PROP_ATIME:
1715 1715 mntopt_on = MNTOPT_ATIME;
1716 1716 mntopt_off = MNTOPT_NOATIME;
1717 1717 break;
1718 1718
1719 1719 case ZFS_PROP_DEVICES:
1720 1720 mntopt_on = MNTOPT_DEVICES;
1721 1721 mntopt_off = MNTOPT_NODEVICES;
1722 1722 break;
1723 1723
1724 1724 case ZFS_PROP_EXEC:
1725 1725 mntopt_on = MNTOPT_EXEC;
1726 1726 mntopt_off = MNTOPT_NOEXEC;
1727 1727 break;
1728 1728
1729 1729 case ZFS_PROP_READONLY:
1730 1730 mntopt_on = MNTOPT_RO;
1731 1731 mntopt_off = MNTOPT_RW;
1732 1732 break;
1733 1733
1734 1734 case ZFS_PROP_SETUID:
1735 1735 mntopt_on = MNTOPT_SETUID;
1736 1736 mntopt_off = MNTOPT_NOSETUID;
1737 1737 break;
1738 1738
1739 1739 case ZFS_PROP_XATTR:
1740 1740 mntopt_on = MNTOPT_XATTR;
1741 1741 mntopt_off = MNTOPT_NOXATTR;
1742 1742 break;
1743 1743
1744 1744 case ZFS_PROP_NBMAND:
1745 1745 mntopt_on = MNTOPT_NBMAND;
1746 1746 mntopt_off = MNTOPT_NONBMAND;
1747 1747 break;
1748 1748 }
1749 1749
1750 1750 /*
1751 1751 * Because looking up the mount options is potentially expensive
1752 1752 * (iterating over all of /etc/mnttab), we defer its calculation until
1753 1753 * we're looking up a property which requires its presence.
1754 1754 */
1755 1755 if (!zhp->zfs_mntcheck &&
1756 1756 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1757 1757 libzfs_handle_t *hdl = zhp->zfs_hdl;
1758 1758 struct mnttab entry;
1759 1759
1760 1760 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1761 1761 zhp->zfs_mntopts = zfs_strdup(hdl,
1762 1762 entry.mnt_mntopts);
1763 1763 if (zhp->zfs_mntopts == NULL)
1764 1764 return (-1);
1765 1765 }
1766 1766
1767 1767 zhp->zfs_mntcheck = B_TRUE;
1768 1768 }
1769 1769
1770 1770 if (zhp->zfs_mntopts == NULL)
1771 1771 mnt.mnt_mntopts = "";
1772 1772 else
1773 1773 mnt.mnt_mntopts = zhp->zfs_mntopts;
1774 1774
1775 1775 switch (prop) {
1776 1776 case ZFS_PROP_ATIME:
1777 1777 case ZFS_PROP_DEVICES:
1778 1778 case ZFS_PROP_EXEC:
1779 1779 case ZFS_PROP_READONLY:
1780 1780 case ZFS_PROP_SETUID:
1781 1781 case ZFS_PROP_XATTR:
1782 1782 case ZFS_PROP_NBMAND:
1783 1783 *val = getprop_uint64(zhp, prop, source);
1784 1784
1785 1785 if (received)
1786 1786 break;
1787 1787
1788 1788 if (hasmntopt(&mnt, mntopt_on) && !*val) {
1789 1789 *val = B_TRUE;
1790 1790 if (src)
1791 1791 *src = ZPROP_SRC_TEMPORARY;
1792 1792 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
1793 1793 *val = B_FALSE;
1794 1794 if (src)
1795 1795 *src = ZPROP_SRC_TEMPORARY;
1796 1796 }
1797 1797 break;
1798 1798
1799 1799 case ZFS_PROP_CANMOUNT:
1800 1800 case ZFS_PROP_VOLSIZE:
1801 1801 case ZFS_PROP_QUOTA:
1802 1802 case ZFS_PROP_REFQUOTA:
1803 1803 case ZFS_PROP_RESERVATION:
1804 1804 case ZFS_PROP_REFRESERVATION:
1805 1805 *val = getprop_uint64(zhp, prop, source);
1806 1806
1807 1807 if (*source == NULL) {
1808 1808 /* not default, must be local */
1809 1809 *source = zhp->zfs_name;
1810 1810 }
1811 1811 break;
1812 1812
1813 1813 case ZFS_PROP_MOUNTED:
1814 1814 *val = (zhp->zfs_mntopts != NULL);
1815 1815 break;
1816 1816
1817 1817 case ZFS_PROP_NUMCLONES:
1818 1818 *val = zhp->zfs_dmustats.dds_num_clones;
1819 1819 break;
1820 1820
1821 1821 case ZFS_PROP_VERSION:
1822 1822 case ZFS_PROP_NORMALIZE:
1823 1823 case ZFS_PROP_UTF8ONLY:
1824 1824 case ZFS_PROP_CASE:
1825 1825 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
1826 1826 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
1827 1827 return (-1);
1828 1828 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1829 1829 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
1830 1830 zcmd_free_nvlists(&zc);
1831 1831 return (-1);
1832 1832 }
1833 1833 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
1834 1834 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
1835 1835 val) != 0) {
1836 1836 zcmd_free_nvlists(&zc);
1837 1837 return (-1);
1838 1838 }
1839 1839 if (zplprops)
1840 1840 nvlist_free(zplprops);
1841 1841 zcmd_free_nvlists(&zc);
1842 1842 break;
1843 1843
1844 1844 default:
1845 1845 switch (zfs_prop_get_type(prop)) {
1846 1846 case PROP_TYPE_NUMBER:
1847 1847 case PROP_TYPE_INDEX:
1848 1848 *val = getprop_uint64(zhp, prop, source);
1849 1849 /*
1850 1850 * If we tried to use a default value for a
1851 1851 * readonly property, it means that it was not
1852 1852 * present.
1853 1853 */
1854 1854 if (zfs_prop_readonly(prop) &&
1855 1855 *source != NULL && (*source)[0] == '\0') {
1856 1856 *source = NULL;
1857 1857 }
1858 1858 break;
1859 1859
1860 1860 case PROP_TYPE_STRING:
1861 1861 default:
1862 1862 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
1863 1863 "cannot get non-numeric property"));
1864 1864 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
1865 1865 dgettext(TEXT_DOMAIN, "internal error")));
1866 1866 }
1867 1867 }
1868 1868
1869 1869 return (0);
1870 1870 }
1871 1871
1872 1872 /*
1873 1873 * Calculate the source type, given the raw source string.
1874 1874 */
1875 1875 static void
1876 1876 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
1877 1877 char *statbuf, size_t statlen)
1878 1878 {
1879 1879 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
1880 1880 return;
1881 1881
1882 1882 if (source == NULL) {
1883 1883 *srctype = ZPROP_SRC_NONE;
1884 1884 } else if (source[0] == '\0') {
1885 1885 *srctype = ZPROP_SRC_DEFAULT;
1886 1886 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
1887 1887 *srctype = ZPROP_SRC_RECEIVED;
1888 1888 } else {
1889 1889 if (strcmp(source, zhp->zfs_name) == 0) {
1890 1890 *srctype = ZPROP_SRC_LOCAL;
1891 1891 } else {
1892 1892 (void) strlcpy(statbuf, source, statlen);
1893 1893 *srctype = ZPROP_SRC_INHERITED;
1894 1894 }
1895 1895 }
1896 1896
1897 1897 }
1898 1898
1899 1899 int
1900 1900 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
1901 1901 size_t proplen, boolean_t literal)
1902 1902 {
1903 1903 zfs_prop_t prop;
1904 1904 int err = 0;
1905 1905
1906 1906 if (zhp->zfs_recvd_props == NULL)
1907 1907 if (get_recvd_props_ioctl(zhp) != 0)
1908 1908 return (-1);
1909 1909
1910 1910 prop = zfs_name_to_prop(propname);
1911 1911
1912 1912 if (prop != ZPROP_INVAL) {
1913 1913 uint64_t cookie;
1914 1914 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
1915 1915 return (-1);
1916 1916 zfs_set_recvd_props_mode(zhp, &cookie);
1917 1917 err = zfs_prop_get(zhp, prop, propbuf, proplen,
1918 1918 NULL, NULL, 0, literal);
1919 1919 zfs_unset_recvd_props_mode(zhp, &cookie);
1920 1920 } else {
1921 1921 nvlist_t *propval;
1922 1922 char *recvdval;
1923 1923 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
1924 1924 propname, &propval) != 0)
1925 1925 return (-1);
1926 1926 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
1927 1927 &recvdval) == 0);
1928 1928 (void) strlcpy(propbuf, recvdval, proplen);
1929 1929 }
1930 1930
1931 1931 return (err == 0 ? 0 : -1);
1932 1932 }
1933 1933
1934 1934 static int
1935 1935 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
1936 1936 {
1937 1937 nvlist_t *value;
1938 1938 nvpair_t *pair;
1939 1939
1940 1940 value = zfs_get_clones_nvl(zhp);
1941 1941 if (value == NULL)
1942 1942 return (-1);
1943 1943
1944 1944 propbuf[0] = '\0';
1945 1945 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
1946 1946 pair = nvlist_next_nvpair(value, pair)) {
1947 1947 if (propbuf[0] != '\0')
1948 1948 (void) strlcat(propbuf, ",", proplen);
1949 1949 (void) strlcat(propbuf, nvpair_name(pair), proplen);
1950 1950 }
1951 1951
1952 1952 return (0);
1953 1953 }
1954 1954
1955 1955 struct get_clones_arg {
1956 1956 uint64_t numclones;
1957 1957 nvlist_t *value;
1958 1958 const char *origin;
1959 1959 char buf[ZFS_MAXNAMELEN];
1960 1960 };
1961 1961
1962 1962 int
1963 1963 get_clones_cb(zfs_handle_t *zhp, void *arg)
1964 1964 {
1965 1965 struct get_clones_arg *gca = arg;
1966 1966
1967 1967 if (gca->numclones == 0) {
1968 1968 zfs_close(zhp);
1969 1969 return (0);
1970 1970 }
1971 1971
1972 1972 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
1973 1973 NULL, NULL, 0, B_TRUE) != 0)
1974 1974 goto out;
1975 1975 if (strcmp(gca->buf, gca->origin) == 0) {
1976 1976 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
1977 1977 gca->numclones--;
1978 1978 }
1979 1979
1980 1980 out:
1981 1981 (void) zfs_iter_children(zhp, get_clones_cb, gca);
1982 1982 zfs_close(zhp);
1983 1983 return (0);
1984 1984 }
1985 1985
1986 1986 nvlist_t *
1987 1987 zfs_get_clones_nvl(zfs_handle_t *zhp)
1988 1988 {
1989 1989 nvlist_t *nv, *value;
1990 1990
1991 1991 if (nvlist_lookup_nvlist(zhp->zfs_props,
1992 1992 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
1993 1993 struct get_clones_arg gca;
1994 1994
1995 1995 /*
1996 1996 * if this is a snapshot, then the kernel wasn't able
1997 1997 * to get the clones. Do it by slowly iterating.
1998 1998 */
1999 1999 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2000 2000 return (NULL);
2001 2001 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2002 2002 return (NULL);
2003 2003 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2004 2004 nvlist_free(nv);
2005 2005 return (NULL);
2006 2006 }
2007 2007
2008 2008 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2009 2009 gca.value = value;
2010 2010 gca.origin = zhp->zfs_name;
2011 2011
2012 2012 if (gca.numclones != 0) {
2013 2013 zfs_handle_t *root;
2014 2014 char pool[ZFS_MAXNAMELEN];
2015 2015 char *cp = pool;
2016 2016
2017 2017 /* get the pool name */
2018 2018 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2019 2019 (void) strsep(&cp, "/@");
2020 2020 root = zfs_open(zhp->zfs_hdl, pool,
2021 2021 ZFS_TYPE_FILESYSTEM);
2022 2022
2023 2023 (void) get_clones_cb(root, &gca);
2024 2024 }
2025 2025
2026 2026 if (gca.numclones != 0 ||
2027 2027 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2028 2028 nvlist_add_nvlist(zhp->zfs_props,
2029 2029 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2030 2030 nvlist_free(nv);
2031 2031 nvlist_free(value);
2032 2032 return (NULL);
2033 2033 }
2034 2034 nvlist_free(nv);
2035 2035 nvlist_free(value);
2036 2036 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2037 2037 zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2038 2038 }
2039 2039
2040 2040 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2041 2041
2042 2042 return (value);
2043 2043 }
2044 2044
2045 2045 /*
2046 2046 * Retrieve a property from the given object. If 'literal' is specified, then
2047 2047 * numbers are left as exact values. Otherwise, numbers are converted to a
2048 2048 * human-readable form.
2049 2049 *
2050 2050 * Returns 0 on success, or -1 on error.
2051 2051 */
2052 2052 int
2053 2053 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2054 2054 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2055 2055 {
2056 2056 char *source = NULL;
2057 2057 uint64_t val;
2058 2058 char *str;
2059 2059 const char *strval;
2060 2060 boolean_t received = zfs_is_recvd_props_mode(zhp);
2061 2061
2062 2062 /*
2063 2063 * Check to see if this property applies to our object
2064 2064 */
2065 2065 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2066 2066 return (-1);
2067 2067
2068 2068 if (received && zfs_prop_readonly(prop))
2069 2069 return (-1);
2070 2070
2071 2071 if (src)
2072 2072 *src = ZPROP_SRC_NONE;
2073 2073
2074 2074 switch (prop) {
2075 2075 case ZFS_PROP_CREATION:
2076 2076 /*
2077 2077 * 'creation' is a time_t stored in the statistics. We convert
2078 2078 * this into a string unless 'literal' is specified.
2079 2079 */
2080 2080 {
2081 2081 val = getprop_uint64(zhp, prop, &source);
2082 2082 time_t time = (time_t)val;
2083 2083 struct tm t;
2084 2084
2085 2085 if (literal ||
2086 2086 localtime_r(&time, &t) == NULL ||
2087 2087 strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2088 2088 &t) == 0)
2089 2089 (void) snprintf(propbuf, proplen, "%llu", val);
2090 2090 }
2091 2091 break;
2092 2092
2093 2093 case ZFS_PROP_MOUNTPOINT:
2094 2094 /*
2095 2095 * Getting the precise mountpoint can be tricky.
2096 2096 *
2097 2097 * - for 'none' or 'legacy', return those values.
2098 2098 * - for inherited mountpoints, we want to take everything
2099 2099 * after our ancestor and append it to the inherited value.
2100 2100 *
2101 2101 * If the pool has an alternate root, we want to prepend that
2102 2102 * root to any values we return.
2103 2103 */
2104 2104
2105 2105 str = getprop_string(zhp, prop, &source);
2106 2106
2107 2107 if (str[0] == '/') {
2108 2108 char buf[MAXPATHLEN];
2109 2109 char *root = buf;
2110 2110 const char *relpath;
2111 2111
2112 2112 /*
2113 2113 * If we inherit the mountpoint, even from a dataset
2114 2114 * with a received value, the source will be the path of
2115 2115 * the dataset we inherit from. If source is
2116 2116 * ZPROP_SOURCE_VAL_RECVD, the received value is not
2117 2117 * inherited.
2118 2118 */
2119 2119 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2120 2120 relpath = "";
2121 2121 } else {
2122 2122 relpath = zhp->zfs_name + strlen(source);
2123 2123 if (relpath[0] == '/')
2124 2124 relpath++;
2125 2125 }
2126 2126
2127 2127 if ((zpool_get_prop(zhp->zpool_hdl,
2128 2128 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL)) ||
2129 2129 (strcmp(root, "-") == 0))
2130 2130 root[0] = '\0';
2131 2131 /*
2132 2132 * Special case an alternate root of '/'. This will
2133 2133 * avoid having multiple leading slashes in the
2134 2134 * mountpoint path.
2135 2135 */
2136 2136 if (strcmp(root, "/") == 0)
2137 2137 root++;
2138 2138
2139 2139 /*
2140 2140 * If the mountpoint is '/' then skip over this
2141 2141 * if we are obtaining either an alternate root or
2142 2142 * an inherited mountpoint.
2143 2143 */
2144 2144 if (str[1] == '\0' && (root[0] != '\0' ||
2145 2145 relpath[0] != '\0'))
2146 2146 str++;
2147 2147
2148 2148 if (relpath[0] == '\0')
2149 2149 (void) snprintf(propbuf, proplen, "%s%s",
2150 2150 root, str);
2151 2151 else
2152 2152 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2153 2153 root, str, relpath[0] == '@' ? "" : "/",
2154 2154 relpath);
2155 2155 } else {
2156 2156 /* 'legacy' or 'none' */
2157 2157 (void) strlcpy(propbuf, str, proplen);
2158 2158 }
2159 2159
2160 2160 break;
2161 2161
2162 2162 case ZFS_PROP_ORIGIN:
2163 2163 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source),
2164 2164 proplen);
2165 2165 /*
2166 2166 * If there is no parent at all, return failure to indicate that
2167 2167 * it doesn't apply to this dataset.
2168 2168 */
2169 2169 if (propbuf[0] == '\0')
2170 2170 return (-1);
2171 2171 break;
2172 2172
2173 2173 case ZFS_PROP_CLONES:
2174 2174 if (get_clones_string(zhp, propbuf, proplen) != 0)
2175 2175 return (-1);
2176 2176 break;
2177 2177
2178 2178 case ZFS_PROP_QUOTA:
2179 2179 case ZFS_PROP_REFQUOTA:
2180 2180 case ZFS_PROP_RESERVATION:
2181 2181 case ZFS_PROP_REFRESERVATION:
2182 2182
2183 2183 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2184 2184 return (-1);
2185 2185
2186 2186 /*
2187 2187 * If quota or reservation is 0, we translate this into 'none'
2188 2188 * (unless literal is set), and indicate that it's the default
2189 2189 * value. Otherwise, we print the number nicely and indicate
2190 2190 * that its set locally.
2191 2191 */
2192 2192 if (val == 0) {
2193 2193 if (literal)
2194 2194 (void) strlcpy(propbuf, "0", proplen);
2195 2195 else
2196 2196 (void) strlcpy(propbuf, "none", proplen);
2197 2197 } else {
2198 2198 if (literal)
2199 2199 (void) snprintf(propbuf, proplen, "%llu",
2200 2200 (u_longlong_t)val);
2201 2201 else
2202 2202 zfs_nicenum(val, propbuf, proplen);
2203 2203 }
2204 2204 break;
2205 2205
2206 2206 case ZFS_PROP_REFRATIO:
2207 2207 case ZFS_PROP_COMPRESSRATIO:
2208 2208 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2209 2209 return (-1);
2210 2210 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2211 2211 (u_longlong_t)(val / 100),
2212 2212 (u_longlong_t)(val % 100));
2213 2213 break;
2214 2214
2215 2215 case ZFS_PROP_TYPE:
2216 2216 switch (zhp->zfs_type) {
2217 2217 case ZFS_TYPE_FILESYSTEM:
2218 2218 str = "filesystem";
2219 2219 break;
2220 2220 case ZFS_TYPE_VOLUME:
2221 2221 str = "volume";
2222 2222 break;
2223 2223 case ZFS_TYPE_SNAPSHOT:
2224 2224 str = "snapshot";
2225 2225 break;
2226 2226 default:
2227 2227 abort();
2228 2228 }
2229 2229 (void) snprintf(propbuf, proplen, "%s", str);
2230 2230 break;
2231 2231
2232 2232 case ZFS_PROP_MOUNTED:
2233 2233 /*
2234 2234 * The 'mounted' property is a pseudo-property that described
2235 2235 * whether the filesystem is currently mounted. Even though
2236 2236 * it's a boolean value, the typical values of "on" and "off"
2237 2237 * don't make sense, so we translate to "yes" and "no".
2238 2238 */
2239 2239 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2240 2240 src, &source, &val) != 0)
2241 2241 return (-1);
2242 2242 if (val)
2243 2243 (void) strlcpy(propbuf, "yes", proplen);
2244 2244 else
2245 2245 (void) strlcpy(propbuf, "no", proplen);
2246 2246 break;
2247 2247
2248 2248 case ZFS_PROP_NAME:
2249 2249 /*
2250 2250 * The 'name' property is a pseudo-property derived from the
2251 2251 * dataset name. It is presented as a real property to simplify
2252 2252 * consumers.
2253 2253 */
2254 2254 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2255 2255 break;
2256 2256
2257 2257 case ZFS_PROP_MLSLABEL:
2258 2258 {
2259 2259 m_label_t *new_sl = NULL;
2260 2260 char *ascii = NULL; /* human readable label */
2261 2261
2262 2262 (void) strlcpy(propbuf,
2263 2263 getprop_string(zhp, prop, &source), proplen);
2264 2264
2265 2265 if (literal || (strcasecmp(propbuf,
2266 2266 ZFS_MLSLABEL_DEFAULT) == 0))
2267 2267 break;
2268 2268
2269 2269 /*
2270 2270 * Try to translate the internal hex string to
2271 2271 * human-readable output. If there are any
2272 2272 * problems just use the hex string.
2273 2273 */
2274 2274
2275 2275 if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2276 2276 L_NO_CORRECTION, NULL) == -1) {
2277 2277 m_label_free(new_sl);
2278 2278 break;
2279 2279 }
2280 2280
2281 2281 if (label_to_str(new_sl, &ascii, M_LABEL,
2282 2282 DEF_NAMES) != 0) {
2283 2283 if (ascii)
2284 2284 free(ascii);
2285 2285 m_label_free(new_sl);
2286 2286 break;
2287 2287 }
2288 2288 m_label_free(new_sl);
2289 2289
2290 2290 (void) strlcpy(propbuf, ascii, proplen);
2291 2291 free(ascii);
2292 2292 }
2293 2293 break;
2294 2294
2295 2295 case ZFS_PROP_GUID:
2296 2296 /*
2297 2297 * GUIDs are stored as numbers, but they are identifiers.
2298 2298 * We don't want them to be pretty printed, because pretty
2299 2299 * printing mangles the ID into a truncated and useless value.
2300 2300 */
2301 2301 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2302 2302 return (-1);
2303 2303 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2304 2304 break;
2305 2305
2306 2306 default:
2307 2307 switch (zfs_prop_get_type(prop)) {
2308 2308 case PROP_TYPE_NUMBER:
2309 2309 if (get_numeric_property(zhp, prop, src,
2310 2310 &source, &val) != 0)
2311 2311 return (-1);
2312 2312 if (literal)
2313 2313 (void) snprintf(propbuf, proplen, "%llu",
2314 2314 (u_longlong_t)val);
2315 2315 else
2316 2316 zfs_nicenum(val, propbuf, proplen);
2317 2317 break;
2318 2318
2319 2319 case PROP_TYPE_STRING:
2320 2320 (void) strlcpy(propbuf,
2321 2321 getprop_string(zhp, prop, &source), proplen);
2322 2322 break;
2323 2323
2324 2324 case PROP_TYPE_INDEX:
2325 2325 if (get_numeric_property(zhp, prop, src,
2326 2326 &source, &val) != 0)
2327 2327 return (-1);
2328 2328 if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2329 2329 return (-1);
2330 2330 (void) strlcpy(propbuf, strval, proplen);
2331 2331 break;
2332 2332
2333 2333 default:
2334 2334 abort();
2335 2335 }
2336 2336 }
2337 2337
2338 2338 get_source(zhp, src, source, statbuf, statlen);
2339 2339
2340 2340 return (0);
2341 2341 }
2342 2342
2343 2343 /*
2344 2344 * Utility function to get the given numeric property. Does no validation that
2345 2345 * the given property is the appropriate type; should only be used with
2346 2346 * hard-coded property types.
2347 2347 */
2348 2348 uint64_t
2349 2349 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2350 2350 {
2351 2351 char *source;
2352 2352 uint64_t val;
2353 2353
2354 2354 (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2355 2355
2356 2356 return (val);
2357 2357 }
2358 2358
2359 2359 int
2360 2360 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2361 2361 {
2362 2362 char buf[64];
2363 2363
2364 2364 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2365 2365 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2366 2366 }
2367 2367
2368 2368 /*
2369 2369 * Similar to zfs_prop_get(), but returns the value as an integer.
2370 2370 */
2371 2371 int
2372 2372 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2373 2373 zprop_source_t *src, char *statbuf, size_t statlen)
2374 2374 {
2375 2375 char *source;
2376 2376
2377 2377 /*
2378 2378 * Check to see if this property applies to our object
2379 2379 */
2380 2380 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2381 2381 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2382 2382 dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2383 2383 zfs_prop_to_name(prop)));
2384 2384 }
2385 2385
2386 2386 if (src)
2387 2387 *src = ZPROP_SRC_NONE;
2388 2388
2389 2389 if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2390 2390 return (-1);
2391 2391
2392 2392 get_source(zhp, src, source, statbuf, statlen);
2393 2393
2394 2394 return (0);
2395 2395 }
2396 2396
2397 2397 static int
2398 2398 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2399 2399 char **domainp, idmap_rid_t *ridp)
2400 2400 {
2401 2401 idmap_get_handle_t *get_hdl = NULL;
2402 2402 idmap_stat status;
2403 2403 int err = EINVAL;
2404 2404
2405 2405 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2406 2406 goto out;
2407 2407
2408 2408 if (isuser) {
2409 2409 err = idmap_get_sidbyuid(get_hdl, id,
2410 2410 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2411 2411 } else {
2412 2412 err = idmap_get_sidbygid(get_hdl, id,
2413 2413 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2414 2414 }
2415 2415 if (err == IDMAP_SUCCESS &&
2416 2416 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2417 2417 status == IDMAP_SUCCESS)
2418 2418 err = 0;
2419 2419 else
2420 2420 err = EINVAL;
2421 2421 out:
2422 2422 if (get_hdl)
2423 2423 idmap_get_destroy(get_hdl);
2424 2424 return (err);
2425 2425 }
2426 2426
2427 2427 /*
2428 2428 * convert the propname into parameters needed by kernel
2429 2429 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2430 2430 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2431 2431 */
2432 2432 static int
2433 2433 userquota_propname_decode(const char *propname, boolean_t zoned,
2434 2434 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2435 2435 {
2436 2436 zfs_userquota_prop_t type;
2437 2437 char *cp, *end;
2438 2438 char *numericsid = NULL;
2439 2439 boolean_t isuser;
2440 2440
2441 2441 domain[0] = '\0';
2442 2442
2443 2443 /* Figure out the property type ({user|group}{quota|space}) */
2444 2444 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2445 2445 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2446 2446 strlen(zfs_userquota_prop_prefixes[type])) == 0)
2447 2447 break;
2448 2448 }
2449 2449 if (type == ZFS_NUM_USERQUOTA_PROPS)
2450 2450 return (EINVAL);
2451 2451 *typep = type;
2452 2452
2453 2453 isuser = (type == ZFS_PROP_USERQUOTA ||
2454 2454 type == ZFS_PROP_USERUSED);
2455 2455
2456 2456 cp = strchr(propname, '@') + 1;
2457 2457
2458 2458 if (strchr(cp, '@')) {
2459 2459 /*
2460 2460 * It's a SID name (eg "user@domain") that needs to be
2461 2461 * turned into S-1-domainID-RID.
2462 2462 */
2463 2463 directory_error_t e;
2464 2464 if (zoned && getzoneid() == GLOBAL_ZONEID)
2465 2465 return (ENOENT);
2466 2466 if (isuser) {
2467 2467 e = directory_sid_from_user_name(NULL,
2468 2468 cp, &numericsid);
2469 2469 } else {
2470 2470 e = directory_sid_from_group_name(NULL,
2471 2471 cp, &numericsid);
2472 2472 }
2473 2473 if (e != NULL) {
2474 2474 directory_error_free(e);
2475 2475 return (ENOENT);
2476 2476 }
2477 2477 if (numericsid == NULL)
2478 2478 return (ENOENT);
2479 2479 cp = numericsid;
2480 2480 /* will be further decoded below */
2481 2481 }
2482 2482
2483 2483 if (strncmp(cp, "S-1-", 4) == 0) {
2484 2484 /* It's a numeric SID (eg "S-1-234-567-89") */
2485 2485 (void) strlcpy(domain, cp, domainlen);
2486 2486 cp = strrchr(domain, '-');
2487 2487 *cp = '\0';
2488 2488 cp++;
2489 2489
2490 2490 errno = 0;
2491 2491 *ridp = strtoull(cp, &end, 10);
2492 2492 if (numericsid) {
2493 2493 free(numericsid);
2494 2494 numericsid = NULL;
2495 2495 }
2496 2496 if (errno != 0 || *end != '\0')
2497 2497 return (EINVAL);
2498 2498 } else if (!isdigit(*cp)) {
2499 2499 /*
2500 2500 * It's a user/group name (eg "user") that needs to be
2501 2501 * turned into a uid/gid
2502 2502 */
2503 2503 if (zoned && getzoneid() == GLOBAL_ZONEID)
2504 2504 return (ENOENT);
2505 2505 if (isuser) {
2506 2506 struct passwd *pw;
2507 2507 pw = getpwnam(cp);
2508 2508 if (pw == NULL)
2509 2509 return (ENOENT);
2510 2510 *ridp = pw->pw_uid;
2511 2511 } else {
2512 2512 struct group *gr;
2513 2513 gr = getgrnam(cp);
2514 2514 if (gr == NULL)
2515 2515 return (ENOENT);
2516 2516 *ridp = gr->gr_gid;
2517 2517 }
2518 2518 } else {
2519 2519 /* It's a user/group ID (eg "12345"). */
2520 2520 uid_t id = strtoul(cp, &end, 10);
2521 2521 idmap_rid_t rid;
2522 2522 char *mapdomain;
2523 2523
2524 2524 if (*end != '\0')
2525 2525 return (EINVAL);
2526 2526 if (id > MAXUID) {
2527 2527 /* It's an ephemeral ID. */
2528 2528 if (idmap_id_to_numeric_domain_rid(id, isuser,
2529 2529 &mapdomain, &rid) != 0)
2530 2530 return (ENOENT);
2531 2531 (void) strlcpy(domain, mapdomain, domainlen);
2532 2532 *ridp = rid;
2533 2533 } else {
2534 2534 *ridp = id;
2535 2535 }
2536 2536 }
2537 2537
2538 2538 ASSERT3P(numericsid, ==, NULL);
2539 2539 return (0);
2540 2540 }
2541 2541
2542 2542 static int
2543 2543 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2544 2544 uint64_t *propvalue, zfs_userquota_prop_t *typep)
2545 2545 {
2546 2546 int err;
2547 2547 zfs_cmd_t zc = { 0 };
2548 2548
2549 2549 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2550 2550
2551 2551 err = userquota_propname_decode(propname,
2552 2552 zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2553 2553 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2554 2554 zc.zc_objset_type = *typep;
2555 2555 if (err)
2556 2556 return (err);
2557 2557
2558 2558 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2559 2559 if (err)
2560 2560 return (err);
2561 2561
2562 2562 *propvalue = zc.zc_cookie;
2563 2563 return (0);
2564 2564 }
2565 2565
2566 2566 int
2567 2567 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2568 2568 uint64_t *propvalue)
2569 2569 {
2570 2570 zfs_userquota_prop_t type;
2571 2571
2572 2572 return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2573 2573 &type));
2574 2574 }
2575 2575
2576 2576 int
2577 2577 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2578 2578 char *propbuf, int proplen, boolean_t literal)
2579 2579 {
2580 2580 int err;
2581 2581 uint64_t propvalue;
2582 2582 zfs_userquota_prop_t type;
2583 2583
2584 2584 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2585 2585 &type);
2586 2586
2587 2587 if (err)
2588 2588 return (err);
2589 2589
2590 2590 if (literal) {
2591 2591 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2592 2592 } else if (propvalue == 0 &&
2593 2593 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2594 2594 (void) strlcpy(propbuf, "none", proplen);
2595 2595 } else {
2596 2596 zfs_nicenum(propvalue, propbuf, proplen);
2597 2597 }
2598 2598 return (0);
2599 2599 }
2600 2600
2601 2601 int
2602 2602 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2603 2603 uint64_t *propvalue)
2604 2604 {
2605 2605 int err;
2606 2606 zfs_cmd_t zc = { 0 };
2607 2607 const char *snapname;
2608 2608
2609 2609 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2610 2610
2611 2611 snapname = strchr(propname, '@') + 1;
2612 2612 if (strchr(snapname, '@')) {
2613 2613 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2614 2614 } else {
2615 2615 /* snapname is the short name, append it to zhp's fsname */
2616 2616 char *cp;
2617 2617
2618 2618 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2619 2619 sizeof (zc.zc_value));
2620 2620 cp = strchr(zc.zc_value, '@');
2621 2621 if (cp != NULL)
2622 2622 *cp = '\0';
2623 2623 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2624 2624 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2625 2625 }
2626 2626
2627 2627 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2628 2628 if (err)
2629 2629 return (err);
2630 2630
2631 2631 *propvalue = zc.zc_cookie;
2632 2632 return (0);
2633 2633 }
2634 2634
2635 2635 int
2636 2636 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2637 2637 char *propbuf, int proplen, boolean_t literal)
2638 2638 {
2639 2639 int err;
2640 2640 uint64_t propvalue;
2641 2641
2642 2642 err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2643 2643
2644 2644 if (err)
2645 2645 return (err);
2646 2646
2647 2647 if (literal) {
2648 2648 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2649 2649 } else {
2650 2650 zfs_nicenum(propvalue, propbuf, proplen);
2651 2651 }
2652 2652 return (0);
2653 2653 }
2654 2654
2655 2655 /*
2656 2656 * Returns the name of the given zfs handle.
2657 2657 */
2658 2658 const char *
2659 2659 zfs_get_name(const zfs_handle_t *zhp)
2660 2660 {
2661 2661 return (zhp->zfs_name);
2662 2662 }
2663 2663
2664 2664 /*
2665 2665 * Returns the type of the given zfs handle.
2666 2666 */
2667 2667 zfs_type_t
2668 2668 zfs_get_type(const zfs_handle_t *zhp)
2669 2669 {
2670 2670 return (zhp->zfs_type);
2671 2671 }
2672 2672
2673 2673 /*
2674 2674 * Is one dataset name a child dataset of another?
2675 2675 *
2676 2676 * Needs to handle these cases:
2677 2677 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo"
2678 2678 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar"
2679 2679 * Descendant? No. No. No. Yes.
2680 2680 */
2681 2681 static boolean_t
2682 2682 is_descendant(const char *ds1, const char *ds2)
2683 2683 {
2684 2684 size_t d1len = strlen(ds1);
2685 2685
2686 2686 /* ds2 can't be a descendant if it's smaller */
2687 2687 if (strlen(ds2) < d1len)
2688 2688 return (B_FALSE);
2689 2689
2690 2690 /* otherwise, compare strings and verify that there's a '/' char */
2691 2691 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2692 2692 }
2693 2693
2694 2694 /*
2695 2695 * Given a complete name, return just the portion that refers to the parent.
2696 2696 * Will return -1 if there is no parent (path is just the name of the
2697 2697 * pool).
2698 2698 */
2699 2699 static int
2700 2700 parent_name(const char *path, char *buf, size_t buflen)
2701 2701 {
2702 2702 char *slashp;
2703 2703
2704 2704 (void) strlcpy(buf, path, buflen);
2705 2705
2706 2706 if ((slashp = strrchr(buf, '/')) == NULL)
2707 2707 return (-1);
2708 2708 *slashp = '\0';
2709 2709
2710 2710 return (0);
2711 2711 }
2712 2712
2713 2713 /*
2714 2714 * If accept_ancestor is false, then check to make sure that the given path has
2715 2715 * a parent, and that it exists. If accept_ancestor is true, then find the
2716 2716 * closest existing ancestor for the given path. In prefixlen return the
2717 2717 * length of already existing prefix of the given path. We also fetch the
2718 2718 * 'zoned' property, which is used to validate property settings when creating
2719 2719 * new datasets.
2720 2720 */
2721 2721 static int
2722 2722 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
2723 2723 boolean_t accept_ancestor, int *prefixlen)
2724 2724 {
2725 2725 zfs_cmd_t zc = { 0 };
2726 2726 char parent[ZFS_MAXNAMELEN];
2727 2727 char *slash;
2728 2728 zfs_handle_t *zhp;
2729 2729 char errbuf[1024];
2730 2730 uint64_t is_zoned;
2731 2731
2732 2732 (void) snprintf(errbuf, sizeof (errbuf),
2733 2733 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
2734 2734
2735 2735 /* get parent, and check to see if this is just a pool */
2736 2736 if (parent_name(path, parent, sizeof (parent)) != 0) {
2737 2737 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2738 2738 "missing dataset name"));
2739 2739 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2740 2740 }
2741 2741
2742 2742 /* check to see if the pool exists */
2743 2743 if ((slash = strchr(parent, '/')) == NULL)
2744 2744 slash = parent + strlen(parent);
2745 2745 (void) strncpy(zc.zc_name, parent, slash - parent);
2746 2746 zc.zc_name[slash - parent] = '\0';
2747 2747 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
2748 2748 errno == ENOENT) {
2749 2749 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2750 2750 "no such pool '%s'"), zc.zc_name);
2751 2751 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2752 2752 }
2753 2753
2754 2754 /* check to see if the parent dataset exists */
2755 2755 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
2756 2756 if (errno == ENOENT && accept_ancestor) {
2757 2757 /*
2758 2758 * Go deeper to find an ancestor, give up on top level.
2759 2759 */
2760 2760 if (parent_name(parent, parent, sizeof (parent)) != 0) {
2761 2761 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2762 2762 "no such pool '%s'"), zc.zc_name);
2763 2763 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2764 2764 }
2765 2765 } else if (errno == ENOENT) {
2766 2766 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2767 2767 "parent does not exist"));
2768 2768 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2769 2769 } else
2770 2770 return (zfs_standard_error(hdl, errno, errbuf));
2771 2771 }
2772 2772
2773 2773 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2774 2774 if (zoned != NULL)
2775 2775 *zoned = is_zoned;
2776 2776
2777 2777 /* we are in a non-global zone, but parent is in the global zone */
2778 2778 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
2779 2779 (void) zfs_standard_error(hdl, EPERM, errbuf);
2780 2780 zfs_close(zhp);
2781 2781 return (-1);
2782 2782 }
2783 2783
2784 2784 /* make sure parent is a filesystem */
2785 2785 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
2786 2786 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2787 2787 "parent is not a filesystem"));
2788 2788 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
2789 2789 zfs_close(zhp);
2790 2790 return (-1);
2791 2791 }
2792 2792
2793 2793 zfs_close(zhp);
2794 2794 if (prefixlen != NULL)
2795 2795 *prefixlen = strlen(parent);
2796 2796 return (0);
2797 2797 }
2798 2798
2799 2799 /*
2800 2800 * Finds whether the dataset of the given type(s) exists.
2801 2801 */
2802 2802 boolean_t
2803 2803 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
2804 2804 {
2805 2805 zfs_handle_t *zhp;
2806 2806
2807 2807 if (!zfs_validate_name(hdl, path, types, B_FALSE))
2808 2808 return (B_FALSE);
2809 2809
2810 2810 /*
2811 2811 * Try to get stats for the dataset, which will tell us if it exists.
2812 2812 */
2813 2813 if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
2814 2814 int ds_type = zhp->zfs_type;
2815 2815
2816 2816 zfs_close(zhp);
2817 2817 if (types & ds_type)
2818 2818 return (B_TRUE);
2819 2819 }
2820 2820 return (B_FALSE);
2821 2821 }
2822 2822
2823 2823 /*
2824 2824 * Given a path to 'target', create all the ancestors between
2825 2825 * the prefixlen portion of the path, and the target itself.
2826 2826 * Fail if the initial prefixlen-ancestor does not already exist.
2827 2827 */
2828 2828 int
2829 2829 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
2830 2830 {
2831 2831 zfs_handle_t *h;
2832 2832 char *cp;
2833 2833 const char *opname;
2834 2834
2835 2835 /* make sure prefix exists */
2836 2836 cp = target + prefixlen;
2837 2837 if (*cp != '/') {
2838 2838 assert(strchr(cp, '/') == NULL);
2839 2839 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2840 2840 } else {
2841 2841 *cp = '\0';
2842 2842 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2843 2843 *cp = '/';
2844 2844 }
2845 2845 if (h == NULL)
2846 2846 return (-1);
2847 2847 zfs_close(h);
2848 2848
2849 2849 /*
2850 2850 * Attempt to create, mount, and share any ancestor filesystems,
2851 2851 * up to the prefixlen-long one.
2852 2852 */
2853 2853 for (cp = target + prefixlen + 1;
2854 2854 cp = strchr(cp, '/'); *cp = '/', cp++) {
2855 2855
2856 2856 *cp = '\0';
2857 2857
2858 2858 h = make_dataset_handle(hdl, target);
2859 2859 if (h) {
2860 2860 /* it already exists, nothing to do here */
2861 2861 zfs_close(h);
2862 2862 continue;
2863 2863 }
2864 2864
2865 2865 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
2866 2866 NULL) != 0) {
2867 2867 opname = dgettext(TEXT_DOMAIN, "create");
2868 2868 goto ancestorerr;
2869 2869 }
2870 2870
2871 2871 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2872 2872 if (h == NULL) {
2873 2873 opname = dgettext(TEXT_DOMAIN, "open");
2874 2874 goto ancestorerr;
2875 2875 }
2876 2876
2877 2877 if (zfs_mount(h, NULL, 0) != 0) {
2878 2878 opname = dgettext(TEXT_DOMAIN, "mount");
2879 2879 goto ancestorerr;
2880 2880 }
2881 2881
2882 2882 if (zfs_share(h) != 0) {
2883 2883 opname = dgettext(TEXT_DOMAIN, "share");
2884 2884 goto ancestorerr;
2885 2885 }
2886 2886
2887 2887 zfs_close(h);
2888 2888 }
2889 2889
2890 2890 return (0);
2891 2891
2892 2892 ancestorerr:
2893 2893 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2894 2894 "failed to %s ancestor '%s'"), opname, target);
2895 2895 return (-1);
2896 2896 }
2897 2897
2898 2898 /*
2899 2899 * Creates non-existing ancestors of the given path.
2900 2900 */
2901 2901 int
2902 2902 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
2903 2903 {
2904 2904 int prefix;
2905 2905 char *path_copy;
2906 2906 int rc;
2907 2907
2908 2908 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
2909 2909 return (-1);
2910 2910
2911 2911 if ((path_copy = strdup(path)) != NULL) {
2912 2912 rc = create_parents(hdl, path_copy, prefix);
2913 2913 free(path_copy);
2914 2914 }
2915 2915 if (path_copy == NULL || rc != 0)
2916 2916 return (-1);
2917 2917
2918 2918 return (0);
2919 2919 }
2920 2920
2921 2921 /*
2922 2922 * Create a new filesystem or volume.
2923 2923 */
2924 2924 int
2925 2925 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
2926 2926 nvlist_t *props)
2927 2927 {
2928 2928 int ret;
2929 2929 uint64_t size = 0;
2930 2930 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
2931 2931 char errbuf[1024];
2932 2932 uint64_t zoned;
2933 2933 dmu_objset_type_t ost;
2934 2934
2935 2935 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2936 2936 "cannot create '%s'"), path);
2937 2937
2938 2938 /* validate the path, taking care to note the extended error message */
2939 2939 if (!zfs_validate_name(hdl, path, type, B_TRUE))
2940 2940 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2941 2941
2942 2942 /* validate parents exist */
2943 2943 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
2944 2944 return (-1);
2945 2945
2946 2946 /*
2947 2947 * The failure modes when creating a dataset of a different type over
2948 2948 * one that already exists is a little strange. In particular, if you
2949 2949 * try to create a dataset on top of an existing dataset, the ioctl()
2950 2950 * will return ENOENT, not EEXIST. To prevent this from happening, we
2951 2951 * first try to see if the dataset exists.
2952 2952 */
2953 2953 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
2954 2954 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2955 2955 "dataset already exists"));
2956 2956 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
2957 2957 }
2958 2958
2959 2959 if (type == ZFS_TYPE_VOLUME)
2960 2960 ost = DMU_OST_ZVOL;
2961 2961 else
2962 2962 ost = DMU_OST_ZFS;
2963 2963
2964 2964 if (props && (props = zfs_valid_proplist(hdl, type, props,
2965 2965 zoned, NULL, errbuf)) == 0)
2966 2966 return (-1);
2967 2967
2968 2968 if (type == ZFS_TYPE_VOLUME) {
2969 2969 /*
2970 2970 * If we are creating a volume, the size and block size must
2971 2971 * satisfy a few restraints. First, the blocksize must be a
2972 2972 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the
2973 2973 * volsize must be a multiple of the block size, and cannot be
2974 2974 * zero.
2975 2975 */
2976 2976 if (props == NULL || nvlist_lookup_uint64(props,
2977 2977 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
2978 2978 nvlist_free(props);
2979 2979 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2980 2980 "missing volume size"));
2981 2981 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2982 2982 }
2983 2983
2984 2984 if ((ret = nvlist_lookup_uint64(props,
2985 2985 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
2986 2986 &blocksize)) != 0) {
2987 2987 if (ret == ENOENT) {
2988 2988 blocksize = zfs_prop_default_numeric(
2989 2989 ZFS_PROP_VOLBLOCKSIZE);
2990 2990 } else {
2991 2991 nvlist_free(props);
2992 2992 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2993 2993 "missing volume block size"));
2994 2994 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2995 2995 }
2996 2996 }
2997 2997
2998 2998 if (size == 0) {
2999 2999 nvlist_free(props);
3000 3000 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3001 3001 "volume size cannot be zero"));
3002 3002 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3003 3003 }
3004 3004
3005 3005 if (size % blocksize != 0) {
3006 3006 nvlist_free(props);
3007 3007 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3008 3008 "volume size must be a multiple of volume block "
3009 3009 "size"));
3010 3010 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3011 3011 }
3012 3012 }
3013 3013
3014 3014 /* create the dataset */
3015 3015 ret = lzc_create(path, ost, props);
3016 3016 nvlist_free(props);
3017 3017
3018 3018 /* check for failure */
3019 3019 if (ret != 0) {
3020 3020 char parent[ZFS_MAXNAMELEN];
3021 3021 (void) parent_name(path, parent, sizeof (parent));
3022 3022
3023 3023 switch (errno) {
3024 3024 case ENOENT:
3025 3025 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3026 3026 "no such parent '%s'"), parent);
3027 3027 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3028 3028
3029 3029 case EINVAL:
3030 3030 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3031 3031 "parent '%s' is not a filesystem"), parent);
3032 3032 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3033 3033
3034 3034 case EDOM:
3035 3035 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3036 3036 "volume block size must be power of 2 from "
3037 3037 "%u to %uk"),
3038 3038 (uint_t)SPA_MINBLOCKSIZE,
3039 3039 (uint_t)SPA_MAXBLOCKSIZE >> 10);
3040 3040
3041 3041 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3042 3042
3043 3043 case ENOTSUP:
3044 3044 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3045 3045 "pool must be upgraded to set this "
3046 3046 "property or value"));
3047 3047 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3048 3048 #ifdef _ILP32
3049 3049 case EOVERFLOW:
3050 3050 /*
3051 3051 * This platform can't address a volume this big.
3052 3052 */
3053 3053 if (type == ZFS_TYPE_VOLUME)
3054 3054 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3055 3055 errbuf));
3056 3056 #endif
3057 3057 /* FALLTHROUGH */
3058 3058 default:
3059 3059 return (zfs_standard_error(hdl, errno, errbuf));
3060 3060 }
3061 3061 }
3062 3062
3063 3063 return (0);
3064 3064 }
3065 3065
3066 3066 /*
3067 3067 * Destroys the given dataset. The caller must make sure that the filesystem
3068 3068 * isn't mounted, and that there are no active dependents. If the file system
3069 3069 * does not exist this function does nothing.
3070 3070 */
3071 3071 int
3072 3072 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3073 3073 {
3074 3074 zfs_cmd_t zc = { 0 };
3075 3075
3076 3076 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3077 3077
3078 3078 if (ZFS_IS_VOLUME(zhp)) {
3079 3079 zc.zc_objset_type = DMU_OST_ZVOL;
3080 3080 } else {
3081 3081 zc.zc_objset_type = DMU_OST_ZFS;
3082 3082 }
3083 3083
3084 3084 zc.zc_defer_destroy = defer;
3085 3085 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3086 3086 errno != ENOENT) {
3087 3087 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3088 3088 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3089 3089 zhp->zfs_name));
3090 3090 }
3091 3091
3092 3092 remove_mountpoint(zhp);
3093 3093
3094 3094 return (0);
3095 3095 }
3096 3096
3097 3097 struct destroydata {
3098 3098 nvlist_t *nvl;
3099 3099 const char *snapname;
3100 3100 };
3101 3101
3102 3102 static int
3103 3103 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3104 3104 {
3105 3105 struct destroydata *dd = arg;
3106 3106 zfs_handle_t *szhp;
3107 3107 char name[ZFS_MAXNAMELEN];
3108 3108 int rv = 0;
3109 3109
3110 3110 (void) snprintf(name, sizeof (name),
3111 3111 "%s@%s", zhp->zfs_name, dd->snapname);
3112 3112
3113 3113 szhp = make_dataset_handle(zhp->zfs_hdl, name);
3114 3114 if (szhp) {
3115 3115 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3116 3116 zfs_close(szhp);
3117 3117 }
3118 3118
3119 3119 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3120 3120 zfs_close(zhp);
3121 3121 return (rv);
3122 3122 }
3123 3123
3124 3124 /*
3125 3125 * Destroys all snapshots with the given name in zhp & descendants.
3126 3126 */
3127 3127 int
3128 3128 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3129 3129 {
3130 3130 int ret;
3131 3131 struct destroydata dd = { 0 };
3132 3132
3133 3133 dd.snapname = snapname;
3134 3134 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3135 3135 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3136 3136
3137 3137 if (nvlist_next_nvpair(dd.nvl, NULL) == NULL) {
3138 3138 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3139 3139 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3140 3140 zhp->zfs_name, snapname);
3141 3141 } else {
3142 3142 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3143 3143 }
3144 3144 nvlist_free(dd.nvl);
3145 3145 return (ret);
3146 3146 }
3147 3147
3148 3148 /*
3149 3149 * Destroys all the snapshots named in the nvlist.
3150 3150 */
3151 3151 int
3152 3152 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3153 3153 {
3154 3154 int ret;
3155 3155 nvlist_t *errlist;
3156 3156
3157 3157 ret = lzc_destroy_snaps(snaps, defer, &errlist);
3158 3158
3159 3159 if (ret == 0)
3160 3160 return (0);
3161 3161
3162 3162 if (nvlist_next_nvpair(errlist, NULL) == NULL) {
3163 3163 char errbuf[1024];
3164 3164 (void) snprintf(errbuf, sizeof (errbuf),
3165 3165 dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3166 3166
3167 3167 ret = zfs_standard_error(hdl, ret, errbuf);
3168 3168 }
3169 3169 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3170 3170 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3171 3171 char errbuf[1024];
3172 3172 (void) snprintf(errbuf, sizeof (errbuf),
3173 3173 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3174 3174 nvpair_name(pair));
3175 3175
3176 3176 switch (fnvpair_value_int32(pair)) {
3177 3177 case EEXIST:
3178 3178 zfs_error_aux(hdl,
3179 3179 dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3180 3180 ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3181 3181 break;
3182 3182 default:
3183 3183 ret = zfs_standard_error(hdl, errno, errbuf);
3184 3184 break;
3185 3185 }
3186 3186 }
3187 3187
3188 3188 return (ret);
3189 3189 }
3190 3190
3191 3191 /*
3192 3192 * Clones the given dataset. The target must be of the same type as the source.
3193 3193 */
3194 3194 int
3195 3195 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3196 3196 {
3197 3197 char parent[ZFS_MAXNAMELEN];
3198 3198 int ret;
3199 3199 char errbuf[1024];
3200 3200 libzfs_handle_t *hdl = zhp->zfs_hdl;
3201 3201 uint64_t zoned;
3202 3202
3203 3203 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3204 3204
3205 3205 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3206 3206 "cannot create '%s'"), target);
3207 3207
3208 3208 /* validate the target/clone name */
3209 3209 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3210 3210 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3211 3211
3212 3212 /* validate parents exist */
3213 3213 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3214 3214 return (-1);
3215 3215
3216 3216 (void) parent_name(target, parent, sizeof (parent));
3217 3217
3218 3218 /* do the clone */
3219 3219
3220 3220 if (props) {
3221 3221 zfs_type_t type;
3222 3222 if (ZFS_IS_VOLUME(zhp)) {
3223 3223 type = ZFS_TYPE_VOLUME;
3224 3224 } else {
3225 3225 type = ZFS_TYPE_FILESYSTEM;
3226 3226 }
3227 3227 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3228 3228 zhp, errbuf)) == NULL)
3229 3229 return (-1);
3230 3230 }
3231 3231
3232 3232 ret = lzc_clone(target, zhp->zfs_name, props);
3233 3233 nvlist_free(props);
3234 3234
3235 3235 if (ret != 0) {
3236 3236 switch (errno) {
3237 3237
3238 3238 case ENOENT:
3239 3239 /*
3240 3240 * The parent doesn't exist. We should have caught this
3241 3241 * above, but there may a race condition that has since
3242 3242 * destroyed the parent.
3243 3243 *
3244 3244 * At this point, we don't know whether it's the source
3245 3245 * that doesn't exist anymore, or whether the target
3246 3246 * dataset doesn't exist.
3247 3247 */
3248 3248 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3249 3249 "no such parent '%s'"), parent);
3250 3250 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3251 3251
3252 3252 case EXDEV:
3253 3253 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3254 3254 "source and target pools differ"));
3255 3255 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3256 3256 errbuf));
3257 3257
3258 3258 default:
3259 3259 return (zfs_standard_error(zhp->zfs_hdl, errno,
3260 3260 errbuf));
3261 3261 }
3262 3262 }
3263 3263
3264 3264 return (ret);
3265 3265 }
3266 3266
3267 3267 /*
3268 3268 * Promotes the given clone fs to be the clone parent.
3269 3269 */
3270 3270 int
3271 3271 zfs_promote(zfs_handle_t *zhp)
3272 3272 {
3273 3273 libzfs_handle_t *hdl = zhp->zfs_hdl;
3274 3274 zfs_cmd_t zc = { 0 };
3275 3275 char parent[MAXPATHLEN];
3276 3276 int ret;
3277 3277 char errbuf[1024];
3278 3278
3279 3279 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3280 3280 "cannot promote '%s'"), zhp->zfs_name);
3281 3281
3282 3282 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3283 3283 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3284 3284 "snapshots can not be promoted"));
3285 3285 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3286 3286 }
3287 3287
3288 3288 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3289 3289 if (parent[0] == '\0') {
3290 3290 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3291 3291 "not a cloned filesystem"));
3292 3292 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3293 3293 }
3294 3294
3295 3295 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3296 3296 sizeof (zc.zc_value));
3297 3297 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3298 3298 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3299 3299
3300 3300 if (ret != 0) {
3301 3301 int save_errno = errno;
3302 3302
3303 3303 switch (save_errno) {
3304 3304 case EEXIST:
3305 3305 /* There is a conflicting snapshot name. */
3306 3306 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3307 3307 "conflicting snapshot '%s' from parent '%s'"),
3308 3308 zc.zc_string, parent);
3309 3309 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3310 3310
3311 3311 default:
3312 3312 return (zfs_standard_error(hdl, save_errno, errbuf));
3313 3313 }
3314 3314 }
3315 3315 return (ret);
3316 3316 }
3317 3317
3318 3318 typedef struct snapdata {
3319 3319 nvlist_t *sd_nvl;
3320 3320 const char *sd_snapname;
3321 3321 } snapdata_t;
3322 3322
3323 3323 static int
3324 3324 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3325 3325 {
3326 3326 snapdata_t *sd = arg;
3327 3327 char name[ZFS_MAXNAMELEN];
3328 3328 int rv = 0;
3329 3329
3330 3330 (void) snprintf(name, sizeof (name),
3331 3331 "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3332 3332
3333 3333 fnvlist_add_boolean(sd->sd_nvl, name);
3334 3334
3335 3335 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3336 3336 zfs_close(zhp);
3337 3337 return (rv);
3338 3338 }
3339 3339
3340 3340 /*
3341 3341 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be
3342 3342 * created.
3343 3343 */
3344 3344 int
3345 3345 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3346 3346 {
3347 3347 int ret;
3348 3348 char errbuf[1024];
3349 3349 nvpair_t *elem;
3350 3350 nvlist_t *errors;
3351 3351
3352 3352 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3353 3353 "cannot create snapshots "));
3354 3354
3355 3355 elem = NULL;
3356 3356 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3357 3357 const char *snapname = nvpair_name(elem);
3358 3358
3359 3359 /* validate the target name */
3360 3360 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3361 3361 B_TRUE)) {
3362 3362 (void) snprintf(errbuf, sizeof (errbuf),
3363 3363 dgettext(TEXT_DOMAIN,
3364 3364 "cannot create snapshot '%s'"), snapname);
3365 3365 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3366 3366 }
3367 3367 }
3368 3368
3369 3369 if (props != NULL &&
3370 3370 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3371 3371 props, B_FALSE, NULL, errbuf)) == NULL) {
3372 3372 return (-1);
3373 3373 }
3374 3374
3375 3375 ret = lzc_snapshot(snaps, props, &errors);
3376 3376
3377 3377 if (ret != 0) {
3378 3378 boolean_t printed = B_FALSE;
3379 3379 for (elem = nvlist_next_nvpair(errors, NULL);
3380 3380 elem != NULL;
3381 3381 elem = nvlist_next_nvpair(errors, elem)) {
3382 3382 (void) snprintf(errbuf, sizeof (errbuf),
3383 3383 dgettext(TEXT_DOMAIN,
3384 3384 "cannot create snapshot '%s'"), nvpair_name(elem));
3385 3385 (void) zfs_standard_error(hdl,
3386 3386 fnvpair_value_int32(elem), errbuf);
3387 3387 printed = B_TRUE;
3388 3388 }
3389 3389 if (!printed) {
3390 3390 switch (ret) {
3391 3391 case EXDEV:
3392 3392 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3393 3393 "multiple snapshots of same "
3394 3394 "fs not allowed"));
3395 3395 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3396 3396
3397 3397 break;
3398 3398 default:
3399 3399 (void) zfs_standard_error(hdl, ret, errbuf);
3400 3400 }
3401 3401 }
3402 3402 }
3403 3403
3404 3404 nvlist_free(props);
3405 3405 nvlist_free(errors);
3406 3406 return (ret);
3407 3407 }
3408 3408
3409 3409 int
3410 3410 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3411 3411 nvlist_t *props)
3412 3412 {
3413 3413 int ret;
3414 3414 snapdata_t sd = { 0 };
3415 3415 char fsname[ZFS_MAXNAMELEN];
3416 3416 char *cp;
3417 3417 zfs_handle_t *zhp;
3418 3418 char errbuf[1024];
3419 3419
3420 3420 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3421 3421 "cannot snapshot %s"), path);
3422 3422
3423 3423 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3424 3424 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3425 3425
3426 3426 (void) strlcpy(fsname, path, sizeof (fsname));
3427 3427 cp = strchr(fsname, '@');
3428 3428 *cp = '\0';
3429 3429 sd.sd_snapname = cp + 1;
3430 3430
3431 3431 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3432 3432 ZFS_TYPE_VOLUME)) == NULL) {
3433 3433 return (-1);
3434 3434 }
3435 3435
3436 3436 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3437 3437 if (recursive) {
3438 3438 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3439 3439 } else {
3440 3440 fnvlist_add_boolean(sd.sd_nvl, path);
3441 3441 }
3442 3442
3443 3443 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3444 3444 nvlist_free(sd.sd_nvl);
3445 3445 zfs_close(zhp);
3446 3446 return (ret);
3447 3447 }
3448 3448
3449 3449 /*
3450 3450 * Destroy any more recent snapshots. We invoke this callback on any dependents
3451 3451 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this
3452 3452 * is a dependent and we should just destroy it without checking the transaction
3453 3453 * group.
3454 3454 */
3455 3455 typedef struct rollback_data {
3456 3456 const char *cb_target; /* the snapshot */
3457 3457 uint64_t cb_create; /* creation time reference */
3458 3458 boolean_t cb_error;
3459 3459 boolean_t cb_dependent;
3460 3460 boolean_t cb_force;
3461 3461 } rollback_data_t;
3462 3462
3463 3463 static int
3464 3464 rollback_destroy(zfs_handle_t *zhp, void *data)
3465 3465 {
3466 3466 rollback_data_t *cbp = data;
3467 3467
3468 3468 if (!cbp->cb_dependent) {
3469 3469 if (strcmp(zhp->zfs_name, cbp->cb_target) != 0 &&
3470 3470 zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3471 3471 zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3472 3472 cbp->cb_create) {
3473 3473
3474 3474 cbp->cb_dependent = B_TRUE;
3475 3475 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3476 3476 rollback_destroy, cbp);
3477 3477 cbp->cb_dependent = B_FALSE;
3478 3478
3479 3479 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3480 3480 }
3481 3481 } else {
3482 3482 /* We must destroy this clone; first unmount it */
3483 3483 prop_changelist_t *clp;
3484 3484
3485 3485 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3486 3486 cbp->cb_force ? MS_FORCE: 0);
3487 3487 if (clp == NULL || changelist_prefix(clp) != 0) {
3488 3488 cbp->cb_error = B_TRUE;
3489 3489 zfs_close(zhp);
3490 3490 return (0);
3491 3491 }
3492 3492 if (zfs_destroy(zhp, B_FALSE) != 0)
3493 3493 cbp->cb_error = B_TRUE;
3494 3494 else
3495 3495 changelist_remove(clp, zhp->zfs_name);
3496 3496 (void) changelist_postfix(clp);
3497 3497 changelist_free(clp);
3498 3498 }
3499 3499
3500 3500 zfs_close(zhp);
3501 3501 return (0);
3502 3502 }
3503 3503
3504 3504 /*
3505 3505 * Given a dataset, rollback to a specific snapshot, discarding any
3506 3506 * data changes since then and making it the active dataset.
3507 3507 *
3508 3508 * Any snapshots more recent than the target are destroyed, along with
3509 3509 * their dependents.
3510 3510 */
3511 3511 int
3512 3512 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3513 3513 {
3514 3514 rollback_data_t cb = { 0 };
3515 3515 int err;
3516 3516 zfs_cmd_t zc = { 0 };
3517 3517 boolean_t restore_resv = 0;
3518 3518 uint64_t old_volsize, new_volsize;
3519 3519 zfs_prop_t resv_prop;
3520 3520
3521 3521 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3522 3522 zhp->zfs_type == ZFS_TYPE_VOLUME);
3523 3523
3524 3524 /*
3525 3525 * Destroy all recent snapshots and their dependents.
3526 3526 */
3527 3527 cb.cb_force = force;
3528 3528 cb.cb_target = snap->zfs_name;
3529 3529 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3530 3530 (void) zfs_iter_children(zhp, rollback_destroy, &cb);
3531 3531
3532 3532 if (cb.cb_error)
3533 3533 return (-1);
3534 3534
3535 3535 /*
3536 3536 * Now that we have verified that the snapshot is the latest,
3537 3537 * rollback to the given snapshot.
3538 3538 */
3539 3539
3540 3540 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3541 3541 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3542 3542 return (-1);
3543 3543 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3544 3544 restore_resv =
3545 3545 (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3546 3546 }
3547 3547
3548 3548 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3549 3549
3550 3550 if (ZFS_IS_VOLUME(zhp))
3551 3551 zc.zc_objset_type = DMU_OST_ZVOL;
3552 3552 else
3553 3553 zc.zc_objset_type = DMU_OST_ZFS;
3554 3554
3555 3555 /*
3556 3556 * We rely on zfs_iter_children() to verify that there are no
3557 3557 * newer snapshots for the given dataset. Therefore, we can
3558 3558 * simply pass the name on to the ioctl() call. There is still
3559 3559 * an unlikely race condition where the user has taken a
3560 3560 * snapshot since we verified that this was the most recent.
3561 3561 *
3562 3562 */
3563 3563 if ((err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_ROLLBACK, &zc)) != 0) {
3564 3564 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3565 3565 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3566 3566 zhp->zfs_name);
3567 3567 return (err);
3568 3568 }
3569 3569
3570 3570 /*
3571 3571 * For volumes, if the pre-rollback volsize matched the pre-
3572 3572 * rollback reservation and the volsize has changed then set
3573 3573 * the reservation property to the post-rollback volsize.
3574 3574 * Make a new handle since the rollback closed the dataset.
3575 3575 */
3576 3576 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3577 3577 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3578 3578 if (restore_resv) {
3579 3579 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3580 3580 if (old_volsize != new_volsize)
3581 3581 err = zfs_prop_set_int(zhp, resv_prop,
3582 3582 new_volsize);
3583 3583 }
3584 3584 zfs_close(zhp);
3585 3585 }
3586 3586 return (err);
3587 3587 }
3588 3588
3589 3589 /*
3590 3590 * Renames the given dataset.
3591 3591 */
3592 3592 int
3593 3593 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
3594 3594 boolean_t force_unmount)
3595 3595 {
3596 3596 int ret;
3597 3597 zfs_cmd_t zc = { 0 };
3598 3598 char *delim;
3599 3599 prop_changelist_t *cl = NULL;
3600 3600 zfs_handle_t *zhrp = NULL;
3601 3601 char *parentname = NULL;
3602 3602 char parent[ZFS_MAXNAMELEN];
3603 3603 libzfs_handle_t *hdl = zhp->zfs_hdl;
3604 3604 char errbuf[1024];
3605 3605
3606 3606 /* if we have the same exact name, just return success */
3607 3607 if (strcmp(zhp->zfs_name, target) == 0)
3608 3608 return (0);
3609 3609
3610 3610 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3611 3611 "cannot rename to '%s'"), target);
3612 3612
3613 3613 /*
3614 3614 * Make sure the target name is valid
3615 3615 */
3616 3616 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3617 3617 if ((strchr(target, '@') == NULL) ||
3618 3618 *target == '@') {
3619 3619 /*
3620 3620 * Snapshot target name is abbreviated,
3621 3621 * reconstruct full dataset name
3622 3622 */
3623 3623 (void) strlcpy(parent, zhp->zfs_name,
3624 3624 sizeof (parent));
3625 3625 delim = strchr(parent, '@');
3626 3626 if (strchr(target, '@') == NULL)
3627 3627 *(++delim) = '\0';
3628 3628 else
3629 3629 *delim = '\0';
3630 3630 (void) strlcat(parent, target, sizeof (parent));
3631 3631 target = parent;
3632 3632 } else {
3633 3633 /*
3634 3634 * Make sure we're renaming within the same dataset.
3635 3635 */
3636 3636 delim = strchr(target, '@');
3637 3637 if (strncmp(zhp->zfs_name, target, delim - target)
3638 3638 != 0 || zhp->zfs_name[delim - target] != '@') {
3639 3639 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3640 3640 "snapshots must be part of same "
3641 3641 "dataset"));
3642 3642 return (zfs_error(hdl, EZFS_CROSSTARGET,
3643 3643 errbuf));
3644 3644 }
3645 3645 }
3646 3646 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3647 3647 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3648 3648 } else {
3649 3649 if (recursive) {
3650 3650 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3651 3651 "recursive rename must be a snapshot"));
3652 3652 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3653 3653 }
3654 3654
3655 3655 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3656 3656 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3657 3657
3658 3658 /* validate parents */
3659 3659 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3660 3660 return (-1);
3661 3661
3662 3662 /* make sure we're in the same pool */
3663 3663 verify((delim = strchr(target, '/')) != NULL);
3664 3664 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3665 3665 zhp->zfs_name[delim - target] != '/') {
3666 3666 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3667 3667 "datasets must be within same pool"));
3668 3668 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3669 3669 }
3670 3670
3671 3671 /* new name cannot be a child of the current dataset name */
3672 3672 if (is_descendant(zhp->zfs_name, target)) {
3673 3673 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3674 3674 "New dataset name cannot be a descendant of "
3675 3675 "current dataset name"));
3676 3676 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3677 3677 }
3678 3678 }
3679 3679
3680 3680 (void) snprintf(errbuf, sizeof (errbuf),
3681 3681 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3682 3682
3683 3683 if (getzoneid() == GLOBAL_ZONEID &&
3684 3684 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3685 3685 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3686 3686 "dataset is used in a non-global zone"));
3687 3687 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3688 3688 }
3689 3689
3690 3690 if (recursive) {
3691 3691
3692 3692 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3693 3693 if (parentname == NULL) {
3694 3694 ret = -1;
3695 3695 goto error;
3696 3696 }
3697 3697 delim = strchr(parentname, '@');
3698 3698 *delim = '\0';
3699 3699 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
3700 3700 if (zhrp == NULL) {
3701 3701 ret = -1;
3702 3702 goto error;
3703 3703 }
3704 3704
3705 3705 } else {
3706 3706 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3707 3707 force_unmount ? MS_FORCE : 0)) == NULL)
3708 3708 return (-1);
3709 3709
3710 3710 if (changelist_haszonedchild(cl)) {
3711 3711 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3712 3712 "child dataset with inherited mountpoint is used "
3713 3713 "in a non-global zone"));
3714 3714 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
3715 3715 goto error;
3716 3716 }
3717 3717
3718 3718 if ((ret = changelist_prefix(cl)) != 0)
3719 3719 goto error;
3720 3720 }
3721 3721
3722 3722 if (ZFS_IS_VOLUME(zhp))
3723 3723 zc.zc_objset_type = DMU_OST_ZVOL;
3724 3724 else
3725 3725 zc.zc_objset_type = DMU_OST_ZFS;
3726 3726
3727 3727 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3728 3728 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
3729 3729
3730 3730 zc.zc_cookie = recursive;
3731 3731
3732 3732 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
3733 3733 /*
3734 3734 * if it was recursive, the one that actually failed will
3735 3735 * be in zc.zc_name
3736 3736 */
3737 3737 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3738 3738 "cannot rename '%s'"), zc.zc_name);
3739 3739
3740 3740 if (recursive && errno == EEXIST) {
3741 3741 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3742 3742 "a child dataset already has a snapshot "
3743 3743 "with the new name"));
3744 3744 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3745 3745 } else {
3746 3746 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
3747 3747 }
3748 3748
3749 3749 /*
3750 3750 * On failure, we still want to remount any filesystems that
3751 3751 * were previously mounted, so we don't alter the system state.
3752 3752 */
3753 3753 if (!recursive)
3754 3754 (void) changelist_postfix(cl);
3755 3755 } else {
3756 3756 if (!recursive) {
3757 3757 changelist_rename(cl, zfs_get_name(zhp), target);
3758 3758 ret = changelist_postfix(cl);
3759 3759 }
3760 3760 }
3761 3761
3762 3762 error:
3763 3763 if (parentname) {
3764 3764 free(parentname);
3765 3765 }
3766 3766 if (zhrp) {
3767 3767 zfs_close(zhrp);
3768 3768 }
3769 3769 if (cl) {
3770 3770 changelist_free(cl);
3771 3771 }
3772 3772 return (ret);
3773 3773 }
3774 3774
3775 3775 nvlist_t *
3776 3776 zfs_get_user_props(zfs_handle_t *zhp)
3777 3777 {
3778 3778 return (zhp->zfs_user_props);
3779 3779 }
3780 3780
3781 3781 nvlist_t *
3782 3782 zfs_get_recvd_props(zfs_handle_t *zhp)
3783 3783 {
3784 3784 if (zhp->zfs_recvd_props == NULL)
3785 3785 if (get_recvd_props_ioctl(zhp) != 0)
3786 3786 return (NULL);
3787 3787 return (zhp->zfs_recvd_props);
3788 3788 }
3789 3789
3790 3790 /*
3791 3791 * This function is used by 'zfs list' to determine the exact set of columns to
3792 3792 * display, and their maximum widths. This does two main things:
3793 3793 *
3794 3794 * - If this is a list of all properties, then expand the list to include
3795 3795 * all native properties, and set a flag so that for each dataset we look
3796 3796 * for new unique user properties and add them to the list.
3797 3797 *
3798 3798 * - For non fixed-width properties, keep track of the maximum width seen
3799 3799 * so that we can size the column appropriately. If the user has
3800 3800 * requested received property values, we also need to compute the width
3801 3801 * of the RECEIVED column.
3802 3802 */
3803 3803 int
3804 3804 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received)
3805 3805 {
3806 3806 libzfs_handle_t *hdl = zhp->zfs_hdl;
3807 3807 zprop_list_t *entry;
3808 3808 zprop_list_t **last, **start;
3809 3809 nvlist_t *userprops, *propval;
3810 3810 nvpair_t *elem;
3811 3811 char *strval;
3812 3812 char buf[ZFS_MAXPROPLEN];
3813 3813
3814 3814 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
3815 3815 return (-1);
3816 3816
3817 3817 userprops = zfs_get_user_props(zhp);
3818 3818
3819 3819 entry = *plp;
3820 3820 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
3821 3821 /*
3822 3822 * Go through and add any user properties as necessary. We
3823 3823 * start by incrementing our list pointer to the first
3824 3824 * non-native property.
3825 3825 */
3826 3826 start = plp;
3827 3827 while (*start != NULL) {
3828 3828 if ((*start)->pl_prop == ZPROP_INVAL)
3829 3829 break;
3830 3830 start = &(*start)->pl_next;
3831 3831 }
3832 3832
3833 3833 elem = NULL;
3834 3834 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
3835 3835 /*
3836 3836 * See if we've already found this property in our list.
3837 3837 */
3838 3838 for (last = start; *last != NULL;
3839 3839 last = &(*last)->pl_next) {
3840 3840 if (strcmp((*last)->pl_user_prop,
3841 3841 nvpair_name(elem)) == 0)
3842 3842 break;
3843 3843 }
3844 3844
3845 3845 if (*last == NULL) {
3846 3846 if ((entry = zfs_alloc(hdl,
3847 3847 sizeof (zprop_list_t))) == NULL ||
3848 3848 ((entry->pl_user_prop = zfs_strdup(hdl,
3849 3849 nvpair_name(elem)))) == NULL) {
3850 3850 free(entry);
3851 3851 return (-1);
3852 3852 }
3853 3853
3854 3854 entry->pl_prop = ZPROP_INVAL;
3855 3855 entry->pl_width = strlen(nvpair_name(elem));
3856 3856 entry->pl_all = B_TRUE;
3857 3857 *last = entry;
3858 3858 }
3859 3859 }
3860 3860 }
3861 3861
3862 3862 /*
3863 3863 * Now go through and check the width of any non-fixed columns
3864 3864 */
3865 3865 for (entry = *plp; entry != NULL; entry = entry->pl_next) {
3866 3866 if (entry->pl_fixed)
3867 3867 continue;
3868 3868
3869 3869 if (entry->pl_prop != ZPROP_INVAL) {
3870 3870 if (zfs_prop_get(zhp, entry->pl_prop,
3871 3871 buf, sizeof (buf), NULL, NULL, 0, B_FALSE) == 0) {
3872 3872 if (strlen(buf) > entry->pl_width)
3873 3873 entry->pl_width = strlen(buf);
3874 3874 }
3875 3875 if (received && zfs_prop_get_recvd(zhp,
3876 3876 zfs_prop_to_name(entry->pl_prop),
3877 3877 buf, sizeof (buf), B_FALSE) == 0)
3878 3878 if (strlen(buf) > entry->pl_recvd_width)
3879 3879 entry->pl_recvd_width = strlen(buf);
3880 3880 } else {
3881 3881 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
3882 3882 &propval) == 0) {
3883 3883 verify(nvlist_lookup_string(propval,
3884 3884 ZPROP_VALUE, &strval) == 0);
3885 3885 if (strlen(strval) > entry->pl_width)
3886 3886 entry->pl_width = strlen(strval);
3887 3887 }
3888 3888 if (received && zfs_prop_get_recvd(zhp,
3889 3889 entry->pl_user_prop,
3890 3890 buf, sizeof (buf), B_FALSE) == 0)
3891 3891 if (strlen(buf) > entry->pl_recvd_width)
3892 3892 entry->pl_recvd_width = strlen(buf);
3893 3893 }
3894 3894 }
3895 3895
3896 3896 return (0);
3897 3897 }
3898 3898
3899 3899 int
3900 3900 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
3901 3901 char *resource, void *export, void *sharetab,
3902 3902 int sharemax, zfs_share_op_t operation)
3903 3903 {
3904 3904 zfs_cmd_t zc = { 0 };
3905 3905 int error;
3906 3906
3907 3907 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3908 3908 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
3909 3909 if (resource)
3910 3910 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
3911 3911 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
3912 3912 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
3913 3913 zc.zc_share.z_sharetype = operation;
3914 3914 zc.zc_share.z_sharemax = sharemax;
3915 3915 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
3916 3916 return (error);
3917 3917 }
3918 3918
3919 3919 void
3920 3920 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
3921 3921 {
3922 3922 nvpair_t *curr;
3923 3923
3924 3924 /*
3925 3925 * Keep a reference to the props-table against which we prune the
3926 3926 * properties.
3927 3927 */
3928 3928 zhp->zfs_props_table = props;
3929 3929
3930 3930 curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
3931 3931
3932 3932 while (curr) {
3933 3933 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
3934 3934 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
3935 3935
3936 3936 /*
3937 3937 * User properties will result in ZPROP_INVAL, and since we
3938 3938 * only know how to prune standard ZFS properties, we always
3939 3939 * leave these in the list. This can also happen if we
3940 3940 * encounter an unknown DSL property (when running older
3941 3941 * software, for example).
3942 3942 */
3943 3943 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
3944 3944 (void) nvlist_remove(zhp->zfs_props,
3945 3945 nvpair_name(curr), nvpair_type(curr));
3946 3946 curr = next;
3947 3947 }
3948 3948 }
3949 3949
3950 3950 static int
3951 3951 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
3952 3952 zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
3953 3953 {
3954 3954 zfs_cmd_t zc = { 0 };
3955 3955 nvlist_t *nvlist = NULL;
3956 3956 int error;
3957 3957
3958 3958 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3959 3959 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
3960 3960 zc.zc_cookie = (uint64_t)cmd;
3961 3961
3962 3962 if (cmd == ZFS_SMB_ACL_RENAME) {
3963 3963 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
3964 3964 (void) no_memory(hdl);
3965 3965 return (NULL);
3966 3966 }
3967 3967 }
3968 3968
3969 3969 switch (cmd) {
3970 3970 case ZFS_SMB_ACL_ADD:
3971 3971 case ZFS_SMB_ACL_REMOVE:
3972 3972 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
3973 3973 break;
3974 3974 case ZFS_SMB_ACL_RENAME:
3975 3975 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
3976 3976 resource1) != 0) {
3977 3977 (void) no_memory(hdl);
3978 3978 return (-1);
3979 3979 }
3980 3980 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
3981 3981 resource2) != 0) {
3982 3982 (void) no_memory(hdl);
3983 3983 return (-1);
3984 3984 }
3985 3985 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
3986 3986 nvlist_free(nvlist);
3987 3987 return (-1);
3988 3988 }
3989 3989 break;
3990 3990 case ZFS_SMB_ACL_PURGE:
3991 3991 break;
3992 3992 default:
3993 3993 return (-1);
3994 3994 }
3995 3995 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
3996 3996 if (nvlist)
3997 3997 nvlist_free(nvlist);
3998 3998 return (error);
3999 3999 }
4000 4000
4001 4001 int
4002 4002 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4003 4003 char *path, char *resource)
4004 4004 {
4005 4005 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4006 4006 resource, NULL));
4007 4007 }
4008 4008
4009 4009 int
4010 4010 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4011 4011 char *path, char *resource)
4012 4012 {
4013 4013 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4014 4014 resource, NULL));
4015 4015 }
4016 4016
4017 4017 int
4018 4018 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4019 4019 {
4020 4020 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4021 4021 NULL, NULL));
4022 4022 }
4023 4023
4024 4024 int
4025 4025 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4026 4026 char *oldname, char *newname)
4027 4027 {
4028 4028 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4029 4029 oldname, newname));
4030 4030 }
4031 4031
4032 4032 int
4033 4033 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4034 4034 zfs_userspace_cb_t func, void *arg)
4035 4035 {
4036 4036 zfs_cmd_t zc = { 0 };
4037 4037 zfs_useracct_t buf[100];
4038 4038 libzfs_handle_t *hdl = zhp->zfs_hdl;
4039 4039 int ret;
4040 4040
4041 4041 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4042 4042
4043 4043 zc.zc_objset_type = type;
4044 4044 zc.zc_nvlist_dst = (uintptr_t)buf;
4045 4045
4046 4046 for (;;) {
4047 4047 zfs_useracct_t *zua = buf;
4048 4048
4049 4049 zc.zc_nvlist_dst_size = sizeof (buf);
4050 4050 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4051 4051 char errbuf[1024];
4052 4052
4053 4053 (void) snprintf(errbuf, sizeof (errbuf),
4054 4054 dgettext(TEXT_DOMAIN,
4055 4055 "cannot get used/quota for %s"), zc.zc_name);
4056 4056 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4057 4057 }
4058 4058 if (zc.zc_nvlist_dst_size == 0)
4059 4059 break;
4060 4060
4061 4061 while (zc.zc_nvlist_dst_size > 0) {
4062 4062 if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4063 4063 zua->zu_space)) != 0)
4064 4064 return (ret);
4065 4065 zua++;
4066 4066 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4067 4067 }
4068 4068 }
4069 4069
4070 4070 return (0);
4071 4071 }
4072 4072
4073 4073 struct holdarg {
4074 4074 nvlist_t *nvl;
4075 4075 const char *snapname;
4076 4076 const char *tag;
4077 4077 boolean_t recursive;
4078 4078 };
4079 4079
4080 4080 static int
4081 4081 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4082 4082 {
4083 4083 struct holdarg *ha = arg;
4084 4084 zfs_handle_t *szhp;
4085 4085 char name[ZFS_MAXNAMELEN];
4086 4086 int rv = 0;
4087 4087
4088 4088 (void) snprintf(name, sizeof (name),
4089 4089 "%s@%s", zhp->zfs_name, ha->snapname);
4090 4090
4091 4091 szhp = make_dataset_handle(zhp->zfs_hdl, name);
4092 4092 if (szhp) {
4093 4093 fnvlist_add_string(ha->nvl, name, ha->tag);
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4094 4094 zfs_close(szhp);
4095 4095 }
4096 4096
4097 4097 if (ha->recursive)
4098 4098 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4099 4099 zfs_close(zhp);
4100 4100 return (rv);
4101 4101 }
4102 4102
4103 4103 int
4104 +zfs_hold_add(zfs_handle_t *zhp, const char *snapname, const char *tag,
4105 + boolean_t enoent_ok, nvlist_t *holds)
4106 +{
4107 + zfs_handle_t *szhp;
4108 + char name[ZFS_MAXNAMELEN];
4109 + char errbuf[1024];
4110 + int ret;
4111 +
4112 + (void) snprintf(name, sizeof (name),
4113 + "%s@%s", zhp->zfs_name, snapname);
4114 +
4115 + szhp = make_dataset_handle(zhp->zfs_hdl, name);
4116 + if (szhp) {
4117 + fnvlist_add_string(holds, name, tag);
4118 + zfs_close(szhp);
4119 + return (0);
4120 + }
4121 +
4122 + ret = ENOENT;
4123 + if (enoent_ok)
4124 + return (ret);
4125 +
4126 + (void) snprintf(errbuf, sizeof (errbuf),
4127 + dgettext(TEXT_DOMAIN, "cannot hold snapshot '%s@%s'"),
4128 + zhp->zfs_name, snapname);
4129 + (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4130 +
4131 + return (ret);
4132 +}
4133 +
4134 +int
4104 4135 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4105 4136 boolean_t recursive, boolean_t enoent_ok, int cleanup_fd)
4106 4137 {
4107 4138 int ret;
4108 4139 struct holdarg ha;
4109 - nvlist_t *errors;
4110 - libzfs_handle_t *hdl = zhp->zfs_hdl;
4111 - char errbuf[1024];
4112 - nvpair_t *elem;
4113 4140
4114 4141 ha.nvl = fnvlist_alloc();
4115 4142 ha.snapname = snapname;
4116 4143 ha.tag = tag;
4117 4144 ha.recursive = recursive;
4118 4145 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4119 - ret = lzc_hold(ha.nvl, cleanup_fd, &errors);
4146 + ret = zfs_hold_apply(zhp, enoent_ok, cleanup_fd, ha.nvl);
4120 4147 fnvlist_free(ha.nvl);
4121 4148
4149 + return (ret);
4150 +}
4151 +
4152 +int
4153 +zfs_hold_apply(zfs_handle_t *zhp, boolean_t enoent_ok, int cleanup_fd, nvlist_t *holds)
4154 +{
4155 + int ret;
4156 + nvlist_t *errors;
4157 + libzfs_handle_t *hdl = zhp->zfs_hdl;
4158 + char errbuf[1024];
4159 + nvpair_t *elem;
4160 +
4161 + ret = lzc_hold(holds, cleanup_fd, &errors);
4162 +
4122 4163 if (ret == 0)
4123 4164 return (0);
4124 4165
4125 4166 if (nvlist_next_nvpair(errors, NULL) == NULL) {
4126 4167 /* no hold-specific errors */
4127 4168 (void) snprintf(errbuf, sizeof (errbuf),
4128 4169 dgettext(TEXT_DOMAIN, "cannot hold"));
4129 4170 switch (ret) {
4130 4171 case ENOTSUP:
4131 4172 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4132 4173 "pool must be upgraded"));
4133 4174 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4134 4175 break;
4135 4176 case EINVAL:
4136 4177 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4137 4178 break;
4138 4179 default:
4139 4180 (void) zfs_standard_error(hdl, ret, errbuf);
4140 4181 }
4141 4182 }
4142 4183
4143 4184 for (elem = nvlist_next_nvpair(errors, NULL);
4144 4185 elem != NULL;
4145 4186 elem = nvlist_next_nvpair(errors, elem)) {
4146 4187 (void) snprintf(errbuf, sizeof (errbuf),
4147 4188 dgettext(TEXT_DOMAIN,
4148 4189 "cannot hold snapshot '%s'"), nvpair_name(elem));
4149 4190 switch (fnvpair_value_int32(elem)) {
4150 4191 case E2BIG:
4151 4192 /*
4152 4193 * Temporary tags wind up having the ds object id
4153 4194 * prepended. So even if we passed the length check
4154 4195 * above, it's still possible for the tag to wind
4155 4196 * up being slightly too long.
4156 4197 */
4157 4198 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4158 4199 break;
4159 4200 case EINVAL:
4160 4201 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4161 4202 break;
4162 4203 case EEXIST:
4163 4204 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4164 4205 break;
4165 4206 case ENOENT:
4166 4207 if (enoent_ok)
4167 4208 return (ENOENT);
4168 4209 /* FALLTHROUGH */
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4169 4210 default:
4170 4211 (void) zfs_standard_error(hdl,
4171 4212 fnvpair_value_int32(elem), errbuf);
4172 4213 }
4173 4214 }
4174 4215
4175 4216 fnvlist_free(errors);
4176 4217 return (ret);
4177 4218 }
4178 4219
4179 -struct releasearg {
4180 - nvlist_t *nvl;
4181 - const char *snapname;
4182 - const char *tag;
4183 - boolean_t recursive;
4184 -};
4185 -
4186 4220 static int
4187 4221 zfs_release_one(zfs_handle_t *zhp, void *arg)
4188 4222 {
4189 4223 struct holdarg *ha = arg;
4190 4224 zfs_handle_t *szhp;
4191 4225 char name[ZFS_MAXNAMELEN];
4192 4226 int rv = 0;
4193 4227
4194 4228 (void) snprintf(name, sizeof (name),
4195 4229 "%s@%s", zhp->zfs_name, ha->snapname);
4196 4230
4197 4231 szhp = make_dataset_handle(zhp->zfs_hdl, name);
4198 4232 if (szhp) {
4199 4233 nvlist_t *holds = fnvlist_alloc();
4200 4234 fnvlist_add_boolean(holds, ha->tag);
4201 4235 fnvlist_add_nvlist(ha->nvl, name, holds);
4236 + fnvlist_free(holds);
4202 4237 zfs_close(szhp);
4203 4238 }
4204 4239
4205 4240 if (ha->recursive)
4206 4241 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4207 4242 zfs_close(zhp);
4208 4243 return (rv);
4209 4244 }
4210 4245
4211 4246 int
4212 4247 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4213 4248 boolean_t recursive)
4214 4249 {
4215 4250 int ret;
4216 4251 struct holdarg ha;
4217 4252 nvlist_t *errors;
4218 4253 nvpair_t *elem;
4219 4254 libzfs_handle_t *hdl = zhp->zfs_hdl;
4220 4255
4221 4256 ha.nvl = fnvlist_alloc();
4222 4257 ha.snapname = snapname;
4223 4258 ha.tag = tag;
4224 4259 ha.recursive = recursive;
4225 4260 (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4226 4261 ret = lzc_release(ha.nvl, &errors);
4227 4262 fnvlist_free(ha.nvl);
4228 4263
4229 4264 if (ret == 0)
4230 4265 return (0);
4231 4266
4232 4267 if (nvlist_next_nvpair(errors, NULL) == NULL) {
4233 4268 /* no hold-specific errors */
4234 4269 char errbuf[1024];
4235 4270
4236 4271 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4237 4272 "cannot release"));
4238 4273 switch (errno) {
4239 4274 case ENOTSUP:
4240 4275 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4241 4276 "pool must be upgraded"));
4242 4277 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4243 4278 break;
4244 4279 default:
4245 4280 (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4246 4281 }
4247 4282 }
4248 4283
4249 4284 for (elem = nvlist_next_nvpair(errors, NULL);
4250 4285 elem != NULL;
4251 4286 elem = nvlist_next_nvpair(errors, elem)) {
4252 4287 char errbuf[1024];
4253 4288
4254 4289 (void) snprintf(errbuf, sizeof (errbuf),
4255 4290 dgettext(TEXT_DOMAIN,
4256 4291 "cannot release hold from snapshot '%s'"),
4257 4292 nvpair_name(elem));
4258 4293 switch (fnvpair_value_int32(elem)) {
4259 4294 case ESRCH:
4260 4295 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4261 4296 break;
4262 4297 case EINVAL:
4263 4298 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4264 4299 break;
4265 4300 default:
4266 4301 (void) zfs_standard_error_fmt(hdl,
4267 4302 fnvpair_value_int32(elem), errbuf);
4268 4303 }
4269 4304 }
4270 4305
4271 4306 fnvlist_free(errors);
4272 4307 return (ret);
4273 4308 }
4274 4309
4275 4310 int
4276 4311 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4277 4312 {
4278 4313 zfs_cmd_t zc = { 0 };
4279 4314 libzfs_handle_t *hdl = zhp->zfs_hdl;
4280 4315 int nvsz = 2048;
4281 4316 void *nvbuf;
4282 4317 int err = 0;
4283 4318 char errbuf[1024];
4284 4319
4285 4320 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4286 4321 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4287 4322
4288 4323 tryagain:
4289 4324
4290 4325 nvbuf = malloc(nvsz);
4291 4326 if (nvbuf == NULL) {
4292 4327 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4293 4328 goto out;
4294 4329 }
4295 4330
4296 4331 zc.zc_nvlist_dst_size = nvsz;
4297 4332 zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4298 4333
4299 4334 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4300 4335
4301 4336 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4302 4337 (void) snprintf(errbuf, sizeof (errbuf),
4303 4338 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4304 4339 zc.zc_name);
4305 4340 switch (errno) {
4306 4341 case ENOMEM:
4307 4342 free(nvbuf);
4308 4343 nvsz = zc.zc_nvlist_dst_size;
4309 4344 goto tryagain;
4310 4345
4311 4346 case ENOTSUP:
4312 4347 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4313 4348 "pool must be upgraded"));
4314 4349 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4315 4350 break;
4316 4351 case EINVAL:
4317 4352 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4318 4353 break;
4319 4354 case ENOENT:
4320 4355 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4321 4356 break;
4322 4357 default:
4323 4358 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4324 4359 break;
4325 4360 }
4326 4361 } else {
4327 4362 /* success */
4328 4363 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4329 4364 if (rc) {
4330 4365 (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4331 4366 TEXT_DOMAIN, "cannot get permissions on '%s'"),
4332 4367 zc.zc_name);
4333 4368 err = zfs_standard_error_fmt(hdl, rc, errbuf);
4334 4369 }
4335 4370 }
4336 4371
4337 4372 free(nvbuf);
4338 4373 out:
4339 4374 return (err);
4340 4375 }
4341 4376
4342 4377 int
4343 4378 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4344 4379 {
4345 4380 zfs_cmd_t zc = { 0 };
4346 4381 libzfs_handle_t *hdl = zhp->zfs_hdl;
4347 4382 char *nvbuf;
4348 4383 char errbuf[1024];
4349 4384 size_t nvsz;
4350 4385 int err;
4351 4386
4352 4387 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4353 4388 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4354 4389
4355 4390 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4356 4391 assert(err == 0);
4357 4392
4358 4393 nvbuf = malloc(nvsz);
4359 4394
4360 4395 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4361 4396 assert(err == 0);
4362 4397
4363 4398 zc.zc_nvlist_src_size = nvsz;
4364 4399 zc.zc_nvlist_src = (uintptr_t)nvbuf;
4365 4400 zc.zc_perm_action = un;
4366 4401
4367 4402 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4368 4403
4369 4404 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4370 4405 (void) snprintf(errbuf, sizeof (errbuf),
4371 4406 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4372 4407 zc.zc_name);
4373 4408 switch (errno) {
4374 4409 case ENOTSUP:
4375 4410 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4376 4411 "pool must be upgraded"));
4377 4412 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4378 4413 break;
4379 4414 case EINVAL:
4380 4415 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4381 4416 break;
4382 4417 case ENOENT:
4383 4418 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4384 4419 break;
4385 4420 default:
4386 4421 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4387 4422 break;
4388 4423 }
4389 4424 }
4390 4425
4391 4426 free(nvbuf);
4392 4427
4393 4428 return (err);
4394 4429 }
4395 4430
4396 4431 int
4397 4432 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4398 4433 {
4399 4434 int err;
4400 4435 char errbuf[1024];
4401 4436
4402 4437 err = lzc_get_holds(zhp->zfs_name, nvl);
4403 4438
4404 4439 if (err != 0) {
4405 4440 libzfs_handle_t *hdl = zhp->zfs_hdl;
4406 4441
4407 4442 (void) snprintf(errbuf, sizeof (errbuf),
4408 4443 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4409 4444 zhp->zfs_name);
4410 4445 switch (err) {
4411 4446 case ENOTSUP:
4412 4447 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4413 4448 "pool must be upgraded"));
4414 4449 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4415 4450 break;
4416 4451 case EINVAL:
4417 4452 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4418 4453 break;
4419 4454 case ENOENT:
4420 4455 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4421 4456 break;
4422 4457 default:
4423 4458 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4424 4459 break;
4425 4460 }
4426 4461 }
4427 4462
4428 4463 return (err);
4429 4464 }
4430 4465
4431 4466 uint64_t
4432 4467 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4433 4468 {
4434 4469 uint64_t numdb;
4435 4470 uint64_t nblocks, volblocksize;
4436 4471 int ncopies;
4437 4472 char *strval;
4438 4473
4439 4474 if (nvlist_lookup_string(props,
4440 4475 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4441 4476 ncopies = atoi(strval);
4442 4477 else
4443 4478 ncopies = 1;
4444 4479 if (nvlist_lookup_uint64(props,
4445 4480 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4446 4481 &volblocksize) != 0)
4447 4482 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4448 4483 nblocks = volsize/volblocksize;
4449 4484 /* start with metadnode L0-L6 */
4450 4485 numdb = 7;
4451 4486 /* calculate number of indirects */
4452 4487 while (nblocks > 1) {
4453 4488 nblocks += DNODES_PER_LEVEL - 1;
4454 4489 nblocks /= DNODES_PER_LEVEL;
4455 4490 numdb += nblocks;
4456 4491 }
4457 4492 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4458 4493 volsize *= ncopies;
4459 4494 /*
4460 4495 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4461 4496 * compressed, but in practice they compress down to about
4462 4497 * 1100 bytes
4463 4498 */
4464 4499 numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4465 4500 volsize += numdb;
4466 4501 return (volsize);
4467 4502 }
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