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