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OS-1566 dataset quota 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 }
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
964 964 if (zprop_parse_value(hdl, elem, prop, type, ret,
965 965 &strval, &intval, errbuf) != 0)
966 966 goto error;
967 967
968 968 /*
969 969 * Perform some additional checks for specific properties.
970 970 */
971 971 switch (prop) {
972 972 case ZFS_PROP_VERSION:
973 973 {
974 974 int version;
975 975
976 976 if (zhp == NULL)
977 977 break;
978 978 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
979 979 if (intval < version) {
980 980 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
981 981 "Can not downgrade; already at version %u"),
982 982 version);
983 983 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
984 984 goto error;
985 985 }
986 986 break;
987 987 }
988 988
989 989 case ZFS_PROP_RECORDSIZE:
990 990 case ZFS_PROP_VOLBLOCKSIZE:
991 991 /* must be power of two within SPA_{MIN,MAX}BLOCKSIZE */
992 992 if (intval < SPA_MINBLOCKSIZE ||
993 993 intval > SPA_MAXBLOCKSIZE || !ISP2(intval)) {
994 994 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
995 995 "'%s' must be power of 2 from %u "
996 996 "to %uk"), propname,
997 997 (uint_t)SPA_MINBLOCKSIZE,
998 998 (uint_t)SPA_MAXBLOCKSIZE >> 10);
999 999 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1000 1000 goto error;
1001 1001 }
1002 1002 break;
1003 1003
1004 1004 case ZFS_PROP_MLSLABEL:
1005 1005 {
1006 1006 /*
1007 1007 * Verify the mlslabel string and convert to
1008 1008 * internal hex label string.
1009 1009 */
1010 1010
1011 1011 m_label_t *new_sl;
1012 1012 char *hex = NULL; /* internal label string */
1013 1013
1014 1014 /* Default value is already OK. */
1015 1015 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1016 1016 break;
1017 1017
1018 1018 /* Verify the label can be converted to binary form */
1019 1019 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1020 1020 (str_to_label(strval, &new_sl, MAC_LABEL,
1021 1021 L_NO_CORRECTION, NULL) == -1)) {
1022 1022 goto badlabel;
1023 1023 }
1024 1024
1025 1025 /* Now translate to hex internal label string */
1026 1026 if (label_to_str(new_sl, &hex, M_INTERNAL,
1027 1027 DEF_NAMES) != 0) {
1028 1028 if (hex)
1029 1029 free(hex);
1030 1030 goto badlabel;
1031 1031 }
1032 1032 m_label_free(new_sl);
1033 1033
1034 1034 /* If string is already in internal form, we're done. */
1035 1035 if (strcmp(strval, hex) == 0) {
1036 1036 free(hex);
1037 1037 break;
1038 1038 }
1039 1039
1040 1040 /* Replace the label string with the internal form. */
1041 1041 (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1042 1042 DATA_TYPE_STRING);
1043 1043 verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1044 1044 hex) == 0);
1045 1045 free(hex);
1046 1046
1047 1047 break;
1048 1048
1049 1049 badlabel:
1050 1050 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1051 1051 "invalid mlslabel '%s'"), strval);
1052 1052 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1053 1053 m_label_free(new_sl); /* OK if null */
1054 1054 goto error;
1055 1055
1056 1056 }
1057 1057
1058 1058 case ZFS_PROP_MOUNTPOINT:
1059 1059 {
1060 1060 namecheck_err_t why;
1061 1061
1062 1062 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1063 1063 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1064 1064 break;
1065 1065
1066 1066 if (mountpoint_namecheck(strval, &why)) {
1067 1067 switch (why) {
1068 1068 case NAME_ERR_LEADING_SLASH:
1069 1069 zfs_error_aux(hdl,
1070 1070 dgettext(TEXT_DOMAIN,
1071 1071 "'%s' must be an absolute path, "
1072 1072 "'none', or 'legacy'"), propname);
1073 1073 break;
1074 1074 case NAME_ERR_TOOLONG:
1075 1075 zfs_error_aux(hdl,
1076 1076 dgettext(TEXT_DOMAIN,
1077 1077 "component of '%s' is too long"),
1078 1078 propname);
1079 1079 break;
1080 1080 }
1081 1081 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1082 1082 goto error;
1083 1083 }
1084 1084 }
1085 1085
1086 1086 /*FALLTHRU*/
1087 1087
1088 1088 case ZFS_PROP_SHARESMB:
1089 1089 case ZFS_PROP_SHARENFS:
1090 1090 /*
1091 1091 * For the mountpoint and sharenfs or sharesmb
1092 1092 * properties, check if it can be set in a
1093 1093 * global/non-global zone based on
1094 1094 * the zoned property value:
1095 1095 *
1096 1096 * global zone non-global zone
1097 1097 * --------------------------------------------------
1098 1098 * zoned=on mountpoint (no) mountpoint (yes)
1099 1099 * sharenfs (no) sharenfs (no)
1100 1100 * sharesmb (no) sharesmb (no)
1101 1101 *
1102 1102 * zoned=off mountpoint (yes) N/A
1103 1103 * sharenfs (yes)
1104 1104 * sharesmb (yes)
1105 1105 */
1106 1106 if (zoned) {
1107 1107 if (getzoneid() == GLOBAL_ZONEID) {
1108 1108 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1109 1109 "'%s' cannot be set on "
1110 1110 "dataset in a non-global zone"),
1111 1111 propname);
1112 1112 (void) zfs_error(hdl, EZFS_ZONED,
1113 1113 errbuf);
1114 1114 goto error;
1115 1115 } else if (prop == ZFS_PROP_SHARENFS ||
1116 1116 prop == ZFS_PROP_SHARESMB) {
1117 1117 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1118 1118 "'%s' cannot be set in "
1119 1119 "a non-global zone"), propname);
1120 1120 (void) zfs_error(hdl, EZFS_ZONED,
1121 1121 errbuf);
1122 1122 goto error;
1123 1123 }
1124 1124 } else if (getzoneid() != GLOBAL_ZONEID) {
1125 1125 /*
1126 1126 * If zoned property is 'off', this must be in
1127 1127 * a global zone. If not, something is wrong.
1128 1128 */
1129 1129 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1130 1130 "'%s' cannot be set while dataset "
1131 1131 "'zoned' property is set"), propname);
1132 1132 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1133 1133 goto error;
1134 1134 }
1135 1135
1136 1136 /*
1137 1137 * At this point, it is legitimate to set the
1138 1138 * property. Now we want to make sure that the
1139 1139 * property value is valid if it is sharenfs.
1140 1140 */
1141 1141 if ((prop == ZFS_PROP_SHARENFS ||
1142 1142 prop == ZFS_PROP_SHARESMB) &&
1143 1143 strcmp(strval, "on") != 0 &&
1144 1144 strcmp(strval, "off") != 0) {
1145 1145 zfs_share_proto_t proto;
1146 1146
1147 1147 if (prop == ZFS_PROP_SHARESMB)
1148 1148 proto = PROTO_SMB;
1149 1149 else
1150 1150 proto = PROTO_NFS;
1151 1151
1152 1152 /*
1153 1153 * Must be an valid sharing protocol
1154 1154 * option string so init the libshare
1155 1155 * in order to enable the parser and
1156 1156 * then parse the options. We use the
1157 1157 * control API since we don't care about
1158 1158 * the current configuration and don't
1159 1159 * want the overhead of loading it
1160 1160 * until we actually do something.
1161 1161 */
1162 1162
1163 1163 if (zfs_init_libshare(hdl,
1164 1164 SA_INIT_CONTROL_API) != SA_OK) {
1165 1165 /*
1166 1166 * An error occurred so we can't do
1167 1167 * anything
1168 1168 */
1169 1169 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1170 1170 "'%s' cannot be set: problem "
1171 1171 "in share initialization"),
1172 1172 propname);
1173 1173 (void) zfs_error(hdl, EZFS_BADPROP,
1174 1174 errbuf);
1175 1175 goto error;
1176 1176 }
1177 1177
1178 1178 if (zfs_parse_options(strval, proto) != SA_OK) {
1179 1179 /*
1180 1180 * There was an error in parsing so
1181 1181 * deal with it by issuing an error
1182 1182 * message and leaving after
1183 1183 * uninitializing the the libshare
1184 1184 * interface.
1185 1185 */
1186 1186 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1187 1187 "'%s' cannot be set to invalid "
1188 1188 "options"), propname);
1189 1189 (void) zfs_error(hdl, EZFS_BADPROP,
1190 1190 errbuf);
1191 1191 zfs_uninit_libshare(hdl);
1192 1192 goto error;
1193 1193 }
1194 1194 zfs_uninit_libshare(hdl);
1195 1195 }
1196 1196
1197 1197 break;
1198 1198 case ZFS_PROP_UTF8ONLY:
1199 1199 chosen_utf = (int)intval;
1200 1200 break;
1201 1201 case ZFS_PROP_NORMALIZE:
1202 1202 chosen_normal = (int)intval;
1203 1203 break;
1204 1204 }
1205 1205
1206 1206 /*
1207 1207 * For changes to existing volumes, we have some additional
1208 1208 * checks to enforce.
1209 1209 */
1210 1210 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1211 1211 uint64_t volsize = zfs_prop_get_int(zhp,
1212 1212 ZFS_PROP_VOLSIZE);
1213 1213 uint64_t blocksize = zfs_prop_get_int(zhp,
1214 1214 ZFS_PROP_VOLBLOCKSIZE);
1215 1215 char buf[64];
1216 1216
1217 1217 switch (prop) {
1218 1218 case ZFS_PROP_RESERVATION:
1219 1219 case ZFS_PROP_REFRESERVATION:
1220 1220 if (intval > volsize) {
1221 1221 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1222 1222 "'%s' is greater than current "
1223 1223 "volume size"), propname);
1224 1224 (void) zfs_error(hdl, EZFS_BADPROP,
1225 1225 errbuf);
1226 1226 goto error;
1227 1227 }
1228 1228 break;
1229 1229
1230 1230 case ZFS_PROP_VOLSIZE:
1231 1231 if (intval % blocksize != 0) {
1232 1232 zfs_nicenum(blocksize, buf,
1233 1233 sizeof (buf));
1234 1234 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1235 1235 "'%s' must be a multiple of "
1236 1236 "volume block size (%s)"),
1237 1237 propname, buf);
1238 1238 (void) zfs_error(hdl, EZFS_BADPROP,
1239 1239 errbuf);
1240 1240 goto error;
1241 1241 }
1242 1242
1243 1243 if (intval == 0) {
1244 1244 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1245 1245 "'%s' cannot be zero"),
1246 1246 propname);
1247 1247 (void) zfs_error(hdl, EZFS_BADPROP,
1248 1248 errbuf);
1249 1249 goto error;
1250 1250 }
1251 1251 break;
1252 1252 }
1253 1253 }
1254 1254 }
1255 1255
1256 1256 /*
1257 1257 * If normalization was chosen, but no UTF8 choice was made,
1258 1258 * enforce rejection of non-UTF8 names.
1259 1259 *
1260 1260 * If normalization was chosen, but rejecting non-UTF8 names
1261 1261 * was explicitly not chosen, it is an error.
1262 1262 */
1263 1263 if (chosen_normal > 0 && chosen_utf < 0) {
1264 1264 if (nvlist_add_uint64(ret,
1265 1265 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1266 1266 (void) no_memory(hdl);
1267 1267 goto error;
1268 1268 }
1269 1269 } else if (chosen_normal > 0 && chosen_utf == 0) {
1270 1270 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1271 1271 "'%s' must be set 'on' if normalization chosen"),
1272 1272 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1273 1273 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1274 1274 goto error;
1275 1275 }
1276 1276 return (ret);
1277 1277
1278 1278 error:
1279 1279 nvlist_free(ret);
1280 1280 return (NULL);
1281 1281 }
1282 1282
1283 1283 int
1284 1284 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1285 1285 {
1286 1286 uint64_t old_volsize;
1287 1287 uint64_t new_volsize;
1288 1288 uint64_t old_reservation;
1289 1289 uint64_t new_reservation;
1290 1290 zfs_prop_t resv_prop;
1291 1291
1292 1292 /*
1293 1293 * If this is an existing volume, and someone is setting the volsize,
1294 1294 * make sure that it matches the reservation, or add it if necessary.
1295 1295 */
1296 1296 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1297 1297 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1298 1298 return (-1);
1299 1299 old_reservation = zfs_prop_get_int(zhp, resv_prop);
1300 1300 if ((zvol_volsize_to_reservation(old_volsize, zhp->zfs_props) !=
1301 1301 old_reservation) || nvlist_lookup_uint64(nvl,
1302 1302 zfs_prop_to_name(resv_prop), &new_reservation) != ENOENT) {
1303 1303 return (0);
1304 1304 }
1305 1305 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1306 1306 &new_volsize) != 0)
1307 1307 return (-1);
1308 1308 new_reservation = zvol_volsize_to_reservation(new_volsize,
1309 1309 zhp->zfs_props);
1310 1310 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1311 1311 new_reservation) != 0) {
1312 1312 (void) no_memory(zhp->zfs_hdl);
1313 1313 return (-1);
1314 1314 }
1315 1315 return (1);
1316 1316 }
1317 1317
1318 1318 void
1319 1319 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1320 1320 char *errbuf)
1321 1321 {
1322 1322 switch (err) {
1323 1323
1324 1324 case ENOSPC:
1325 1325 /*
1326 1326 * For quotas and reservations, ENOSPC indicates
1327 1327 * something different; setting a quota or reservation
1328 1328 * doesn't use any disk space.
1329 1329 */
1330 1330 switch (prop) {
1331 1331 case ZFS_PROP_QUOTA:
1332 1332 case ZFS_PROP_REFQUOTA:
1333 1333 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1334 1334 "size is less than current used or "
1335 1335 "reserved space"));
1336 1336 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1337 1337 break;
1338 1338
1339 1339 case ZFS_PROP_RESERVATION:
1340 1340 case ZFS_PROP_REFRESERVATION:
1341 1341 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1342 1342 "size is greater than available space"));
1343 1343 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1344 1344 break;
1345 1345
1346 1346 default:
1347 1347 (void) zfs_standard_error(hdl, err, errbuf);
1348 1348 break;
1349 1349 }
1350 1350 break;
1351 1351
1352 1352 case EBUSY:
1353 1353 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1354 1354 break;
1355 1355
1356 1356 case EROFS:
1357 1357 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1358 1358 break;
1359 1359
1360 1360 case ENOTSUP:
1361 1361 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1362 1362 "pool and or dataset must be upgraded to set this "
1363 1363 "property or value"));
1364 1364 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1365 1365 break;
1366 1366
1367 1367 case ERANGE:
1368 1368 if (prop == ZFS_PROP_COMPRESSION) {
1369 1369 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1370 1370 "property setting is not allowed on "
1371 1371 "bootable datasets"));
1372 1372 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1373 1373 } else {
1374 1374 (void) zfs_standard_error(hdl, err, errbuf);
1375 1375 }
1376 1376 break;
1377 1377
1378 1378 case EINVAL:
1379 1379 if (prop == ZPROP_INVAL) {
1380 1380 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1381 1381 } else {
1382 1382 (void) zfs_standard_error(hdl, err, errbuf);
1383 1383 }
1384 1384 break;
1385 1385
1386 1386 case EOVERFLOW:
1387 1387 /*
1388 1388 * This platform can't address a volume this big.
1389 1389 */
1390 1390 #ifdef _ILP32
1391 1391 if (prop == ZFS_PROP_VOLSIZE) {
1392 1392 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1393 1393 break;
1394 1394 }
1395 1395 #endif
1396 1396 /* FALLTHROUGH */
1397 1397 default:
1398 1398 (void) zfs_standard_error(hdl, err, errbuf);
1399 1399 }
1400 1400 }
1401 1401
1402 1402 /*
1403 1403 * Given a property name and value, set the property for the given dataset.
1404 1404 */
1405 1405 int
1406 1406 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1407 1407 {
1408 1408 zfs_cmd_t zc = { 0 };
1409 1409 int ret = -1;
1410 1410 prop_changelist_t *cl = NULL;
1411 1411 char errbuf[1024];
1412 1412 libzfs_handle_t *hdl = zhp->zfs_hdl;
1413 1413 nvlist_t *nvl = NULL, *realprops;
1414 1414 zfs_prop_t prop;
1415 1415 boolean_t do_prefix = B_TRUE;
1416 1416 int added_resv;
1417 1417
1418 1418 (void) snprintf(errbuf, sizeof (errbuf),
1419 1419 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1420 1420 zhp->zfs_name);
1421 1421
1422 1422 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1423 1423 nvlist_add_string(nvl, propname, propval) != 0) {
1424 1424 (void) no_memory(hdl);
1425 1425 goto error;
1426 1426 }
1427 1427
1428 1428 if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl,
1429 1429 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
1430 1430 goto error;
1431 1431
1432 1432 nvlist_free(nvl);
1433 1433 nvl = realprops;
1434 1434
1435 1435 prop = zfs_name_to_prop(propname);
1436 1436
1437 1437 if (prop == ZFS_PROP_VOLSIZE) {
1438 1438 if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1)
1439 1439 goto error;
1440 1440 }
1441 1441
1442 1442 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1443 1443 goto error;
1444 1444
1445 1445 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1446 1446 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1447 1447 "child dataset with inherited mountpoint is used "
1448 1448 "in a non-global zone"));
1449 1449 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1450 1450 goto error;
1451 1451 }
1452 1452
1453 1453 /*
1454 1454 * We don't want to unmount & remount the dataset when changing
1455 1455 * its canmount property to 'on' or 'noauto'. We only use
1456 1456 * the changelist logic to unmount when setting canmount=off.
1457 1457 */
1458 1458 if (prop == ZFS_PROP_CANMOUNT) {
1459 1459 uint64_t idx;
1460 1460 int err = zprop_string_to_index(prop, propval, &idx,
1461 1461 ZFS_TYPE_DATASET);
1462 1462 if (err == 0 && idx != ZFS_CANMOUNT_OFF)
1463 1463 do_prefix = B_FALSE;
1464 1464 }
1465 1465
1466 1466 if (do_prefix && (ret = changelist_prefix(cl)) != 0)
1467 1467 goto error;
1468 1468
1469 1469 /*
1470 1470 * Execute the corresponding ioctl() to set this property.
1471 1471 */
1472 1472 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1473 1473
1474 1474 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1475 1475 goto error;
1476 1476
1477 1477 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1478 1478
1479 1479 if (ret != 0) {
1480 1480 zfs_setprop_error(hdl, prop, errno, errbuf);
1481 1481 if (added_resv && errno == ENOSPC) {
1482 1482 /* clean up the volsize property we tried to set */
1483 1483 uint64_t old_volsize = zfs_prop_get_int(zhp,
1484 1484 ZFS_PROP_VOLSIZE);
1485 1485 nvlist_free(nvl);
1486 1486 zcmd_free_nvlists(&zc);
1487 1487 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1488 1488 goto error;
1489 1489 if (nvlist_add_uint64(nvl,
1490 1490 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1491 1491 old_volsize) != 0)
1492 1492 goto error;
1493 1493 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1494 1494 goto error;
1495 1495 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1496 1496 }
1497 1497 } else {
1498 1498 if (do_prefix)
1499 1499 ret = changelist_postfix(cl);
1500 1500
1501 1501 /*
1502 1502 * Refresh the statistics so the new property value
1503 1503 * is reflected.
1504 1504 */
1505 1505 if (ret == 0)
1506 1506 (void) get_stats(zhp);
1507 1507 }
1508 1508
1509 1509 error:
1510 1510 nvlist_free(nvl);
1511 1511 zcmd_free_nvlists(&zc);
1512 1512 if (cl)
1513 1513 changelist_free(cl);
1514 1514 return (ret);
1515 1515 }
1516 1516
1517 1517 /*
1518 1518 * Given a property, inherit the value from the parent dataset, or if received
1519 1519 * is TRUE, revert to the received value, if any.
1520 1520 */
1521 1521 int
1522 1522 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1523 1523 {
1524 1524 zfs_cmd_t zc = { 0 };
1525 1525 int ret;
1526 1526 prop_changelist_t *cl;
1527 1527 libzfs_handle_t *hdl = zhp->zfs_hdl;
1528 1528 char errbuf[1024];
1529 1529 zfs_prop_t prop;
1530 1530
1531 1531 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1532 1532 "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1533 1533
1534 1534 zc.zc_cookie = received;
1535 1535 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1536 1536 /*
1537 1537 * For user properties, the amount of work we have to do is very
1538 1538 * small, so just do it here.
1539 1539 */
1540 1540 if (!zfs_prop_user(propname)) {
1541 1541 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1542 1542 "invalid property"));
1543 1543 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1544 1544 }
1545 1545
1546 1546 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1547 1547 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1548 1548
1549 1549 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1550 1550 return (zfs_standard_error(hdl, errno, errbuf));
1551 1551
1552 1552 return (0);
1553 1553 }
1554 1554
1555 1555 /*
1556 1556 * Verify that this property is inheritable.
1557 1557 */
1558 1558 if (zfs_prop_readonly(prop))
1559 1559 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1560 1560
1561 1561 if (!zfs_prop_inheritable(prop) && !received)
1562 1562 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1563 1563
1564 1564 /*
1565 1565 * Check to see if the value applies to this type
1566 1566 */
1567 1567 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1568 1568 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1569 1569
1570 1570 /*
1571 1571 * Normalize the name, to get rid of shorthand abbreviations.
1572 1572 */
1573 1573 propname = zfs_prop_to_name(prop);
1574 1574 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1575 1575 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1576 1576
1577 1577 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1578 1578 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1579 1579 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1580 1580 "dataset is used in a non-global zone"));
1581 1581 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1582 1582 }
1583 1583
1584 1584 /*
1585 1585 * Determine datasets which will be affected by this change, if any.
1586 1586 */
1587 1587 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1588 1588 return (-1);
1589 1589
1590 1590 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1591 1591 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1592 1592 "child dataset with inherited mountpoint is used "
1593 1593 "in a non-global zone"));
1594 1594 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1595 1595 goto error;
1596 1596 }
1597 1597
1598 1598 if ((ret = changelist_prefix(cl)) != 0)
1599 1599 goto error;
1600 1600
1601 1601 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1602 1602 return (zfs_standard_error(hdl, errno, errbuf));
1603 1603 } else {
1604 1604
1605 1605 if ((ret = changelist_postfix(cl)) != 0)
1606 1606 goto error;
1607 1607
1608 1608 /*
1609 1609 * Refresh the statistics so the new property is reflected.
1610 1610 */
1611 1611 (void) get_stats(zhp);
1612 1612 }
1613 1613
1614 1614 error:
1615 1615 changelist_free(cl);
1616 1616 return (ret);
1617 1617 }
1618 1618
1619 1619 /*
1620 1620 * True DSL properties are stored in an nvlist. The following two functions
1621 1621 * extract them appropriately.
1622 1622 */
1623 1623 static uint64_t
1624 1624 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1625 1625 {
1626 1626 nvlist_t *nv;
1627 1627 uint64_t value;
1628 1628
1629 1629 *source = NULL;
1630 1630 if (nvlist_lookup_nvlist(zhp->zfs_props,
1631 1631 zfs_prop_to_name(prop), &nv) == 0) {
1632 1632 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1633 1633 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1634 1634 } else {
1635 1635 verify(!zhp->zfs_props_table ||
1636 1636 zhp->zfs_props_table[prop] == B_TRUE);
1637 1637 value = zfs_prop_default_numeric(prop);
1638 1638 *source = "";
1639 1639 }
1640 1640
1641 1641 return (value);
1642 1642 }
1643 1643
1644 1644 static char *
1645 1645 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1646 1646 {
1647 1647 nvlist_t *nv;
1648 1648 char *value;
1649 1649
1650 1650 *source = NULL;
1651 1651 if (nvlist_lookup_nvlist(zhp->zfs_props,
1652 1652 zfs_prop_to_name(prop), &nv) == 0) {
1653 1653 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
1654 1654 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1655 1655 } else {
1656 1656 verify(!zhp->zfs_props_table ||
1657 1657 zhp->zfs_props_table[prop] == B_TRUE);
1658 1658 if ((value = (char *)zfs_prop_default_string(prop)) == NULL)
1659 1659 value = "";
1660 1660 *source = "";
1661 1661 }
1662 1662
1663 1663 return (value);
1664 1664 }
1665 1665
1666 1666 static boolean_t
1667 1667 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1668 1668 {
1669 1669 return (zhp->zfs_props == zhp->zfs_recvd_props);
1670 1670 }
1671 1671
1672 1672 static void
1673 1673 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1674 1674 {
1675 1675 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1676 1676 zhp->zfs_props = zhp->zfs_recvd_props;
1677 1677 }
1678 1678
1679 1679 static void
1680 1680 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1681 1681 {
1682 1682 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1683 1683 *cookie = 0;
1684 1684 }
1685 1685
1686 1686 /*
1687 1687 * Internal function for getting a numeric property. Both zfs_prop_get() and
1688 1688 * zfs_prop_get_int() are built using this interface.
1689 1689 *
1690 1690 * Certain properties can be overridden using 'mount -o'. In this case, scan
1691 1691 * the contents of the /etc/mnttab entry, searching for the appropriate options.
1692 1692 * If they differ from the on-disk values, report the current values and mark
1693 1693 * the source "temporary".
1694 1694 */
1695 1695 static int
1696 1696 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1697 1697 char **source, uint64_t *val)
1698 1698 {
1699 1699 zfs_cmd_t zc = { 0 };
1700 1700 nvlist_t *zplprops = NULL;
1701 1701 struct mnttab mnt;
1702 1702 char *mntopt_on = NULL;
1703 1703 char *mntopt_off = NULL;
1704 1704 boolean_t received = zfs_is_recvd_props_mode(zhp);
1705 1705
1706 1706 *source = NULL;
1707 1707
1708 1708 switch (prop) {
1709 1709 case ZFS_PROP_ATIME:
1710 1710 mntopt_on = MNTOPT_ATIME;
1711 1711 mntopt_off = MNTOPT_NOATIME;
1712 1712 break;
1713 1713
1714 1714 case ZFS_PROP_DEVICES:
1715 1715 mntopt_on = MNTOPT_DEVICES;
1716 1716 mntopt_off = MNTOPT_NODEVICES;
1717 1717 break;
1718 1718
1719 1719 case ZFS_PROP_EXEC:
1720 1720 mntopt_on = MNTOPT_EXEC;
1721 1721 mntopt_off = MNTOPT_NOEXEC;
1722 1722 break;
1723 1723
1724 1724 case ZFS_PROP_READONLY:
1725 1725 mntopt_on = MNTOPT_RO;
1726 1726 mntopt_off = MNTOPT_RW;
1727 1727 break;
1728 1728
1729 1729 case ZFS_PROP_SETUID:
1730 1730 mntopt_on = MNTOPT_SETUID;
1731 1731 mntopt_off = MNTOPT_NOSETUID;
1732 1732 break;
1733 1733
1734 1734 case ZFS_PROP_XATTR:
1735 1735 mntopt_on = MNTOPT_XATTR;
1736 1736 mntopt_off = MNTOPT_NOXATTR;
1737 1737 break;
1738 1738
1739 1739 case ZFS_PROP_NBMAND:
1740 1740 mntopt_on = MNTOPT_NBMAND;
1741 1741 mntopt_off = MNTOPT_NONBMAND;
1742 1742 break;
1743 1743 }
1744 1744
1745 1745 /*
1746 1746 * Because looking up the mount options is potentially expensive
1747 1747 * (iterating over all of /etc/mnttab), we defer its calculation until
1748 1748 * we're looking up a property which requires its presence.
1749 1749 */
1750 1750 if (!zhp->zfs_mntcheck &&
1751 1751 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1752 1752 libzfs_handle_t *hdl = zhp->zfs_hdl;
1753 1753 struct mnttab entry;
1754 1754
1755 1755 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1756 1756 zhp->zfs_mntopts = zfs_strdup(hdl,
1757 1757 entry.mnt_mntopts);
1758 1758 if (zhp->zfs_mntopts == NULL)
1759 1759 return (-1);
1760 1760 }
1761 1761
1762 1762 zhp->zfs_mntcheck = B_TRUE;
1763 1763 }
1764 1764
1765 1765 if (zhp->zfs_mntopts == NULL)
1766 1766 mnt.mnt_mntopts = "";
1767 1767 else
1768 1768 mnt.mnt_mntopts = zhp->zfs_mntopts;
1769 1769
1770 1770 switch (prop) {
1771 1771 case ZFS_PROP_ATIME:
1772 1772 case ZFS_PROP_DEVICES:
1773 1773 case ZFS_PROP_EXEC:
1774 1774 case ZFS_PROP_READONLY:
1775 1775 case ZFS_PROP_SETUID:
1776 1776 case ZFS_PROP_XATTR:
1777 1777 case ZFS_PROP_NBMAND:
1778 1778 *val = getprop_uint64(zhp, prop, source);
1779 1779
1780 1780 if (received)
1781 1781 break;
1782 1782
1783 1783 if (hasmntopt(&mnt, mntopt_on) && !*val) {
1784 1784 *val = B_TRUE;
1785 1785 if (src)
1786 1786 *src = ZPROP_SRC_TEMPORARY;
1787 1787 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
1788 1788 *val = B_FALSE;
1789 1789 if (src)
1790 1790 *src = ZPROP_SRC_TEMPORARY;
1791 1791 }
1792 1792 break;
1793 1793
1794 1794 case ZFS_PROP_CANMOUNT:
1795 1795 case ZFS_PROP_VOLSIZE:
1796 1796 case ZFS_PROP_QUOTA:
1797 1797 case ZFS_PROP_REFQUOTA:
1798 1798 case ZFS_PROP_RESERVATION:
1799 1799 case ZFS_PROP_REFRESERVATION:
1800 1800 *val = getprop_uint64(zhp, prop, source);
1801 1801
1802 1802 if (*source == NULL) {
1803 1803 /* not default, must be local */
1804 1804 *source = zhp->zfs_name;
1805 1805 }
1806 1806 break;
1807 1807
1808 1808 case ZFS_PROP_MOUNTED:
1809 1809 *val = (zhp->zfs_mntopts != NULL);
1810 1810 break;
1811 1811
1812 1812 case ZFS_PROP_NUMCLONES:
1813 1813 *val = zhp->zfs_dmustats.dds_num_clones;
1814 1814 break;
1815 1815
1816 1816 case ZFS_PROP_VERSION:
1817 1817 case ZFS_PROP_NORMALIZE:
1818 1818 case ZFS_PROP_UTF8ONLY:
1819 1819 case ZFS_PROP_CASE:
1820 1820 if (zhp->zfs_hdl->libzfs_cachedprops) {
1821 1821 return (zfs_error(zhp->zfs_hdl, EZFS_PROPCACHED,
1822 1822 "property unavailable since not cached"));
1823 1823 }
1824 1824
1825 1825 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
1826 1826 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
1827 1827 return (-1);
1828 1828 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1829 1829 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
1830 1830 zcmd_free_nvlists(&zc);
1831 1831 return (-1);
1832 1832 }
1833 1833 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
1834 1834 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
1835 1835 val) != 0) {
1836 1836 zcmd_free_nvlists(&zc);
1837 1837 return (-1);
1838 1838 }
1839 1839 if (zplprops)
1840 1840 nvlist_free(zplprops);
1841 1841 zcmd_free_nvlists(&zc);
1842 1842 break;
1843 1843
1844 1844 default:
1845 1845 switch (zfs_prop_get_type(prop)) {
1846 1846 case PROP_TYPE_NUMBER:
1847 1847 case PROP_TYPE_INDEX:
1848 1848 *val = getprop_uint64(zhp, prop, source);
1849 1849 /*
1850 1850 * If we tried to use a default value for a
1851 1851 * readonly property, it means that it was not
1852 1852 * present.
1853 1853 */
1854 1854 if (zfs_prop_readonly(prop) &&
1855 1855 *source != NULL && (*source)[0] == '\0') {
1856 1856 *source = NULL;
1857 1857 }
1858 1858 break;
1859 1859
1860 1860 case PROP_TYPE_STRING:
1861 1861 default:
1862 1862 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
1863 1863 "cannot get non-numeric property"));
1864 1864 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
1865 1865 dgettext(TEXT_DOMAIN, "internal error")));
1866 1866 }
1867 1867 }
1868 1868
1869 1869 return (0);
1870 1870 }
1871 1871
1872 1872 /*
1873 1873 * Calculate the source type, given the raw source string.
1874 1874 */
1875 1875 static void
1876 1876 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
1877 1877 char *statbuf, size_t statlen)
1878 1878 {
1879 1879 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
1880 1880 return;
1881 1881
1882 1882 if (source == NULL) {
1883 1883 *srctype = ZPROP_SRC_NONE;
1884 1884 } else if (source[0] == '\0') {
1885 1885 *srctype = ZPROP_SRC_DEFAULT;
1886 1886 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
1887 1887 *srctype = ZPROP_SRC_RECEIVED;
1888 1888 } else {
1889 1889 if (strcmp(source, zhp->zfs_name) == 0) {
1890 1890 *srctype = ZPROP_SRC_LOCAL;
1891 1891 } else {
1892 1892 (void) strlcpy(statbuf, source, statlen);
1893 1893 *srctype = ZPROP_SRC_INHERITED;
1894 1894 }
1895 1895 }
1896 1896
1897 1897 }
1898 1898
1899 1899 int
1900 1900 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
1901 1901 size_t proplen, boolean_t literal)
1902 1902 {
1903 1903 zfs_prop_t prop;
1904 1904 int err = 0;
1905 1905
1906 1906 if (zhp->zfs_recvd_props == NULL)
1907 1907 if (get_recvd_props_ioctl(zhp) != 0)
1908 1908 return (-1);
1909 1909
1910 1910 prop = zfs_name_to_prop(propname);
1911 1911
1912 1912 if (prop != ZPROP_INVAL) {
1913 1913 uint64_t cookie;
1914 1914 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
1915 1915 return (-1);
1916 1916 zfs_set_recvd_props_mode(zhp, &cookie);
1917 1917 err = zfs_prop_get(zhp, prop, propbuf, proplen,
1918 1918 NULL, NULL, 0, literal);
1919 1919 zfs_unset_recvd_props_mode(zhp, &cookie);
1920 1920 } else {
1921 1921 nvlist_t *propval;
1922 1922 char *recvdval;
1923 1923 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
1924 1924 propname, &propval) != 0)
1925 1925 return (-1);
1926 1926 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
1927 1927 &recvdval) == 0);
1928 1928 (void) strlcpy(propbuf, recvdval, proplen);
1929 1929 }
1930 1930
1931 1931 return (err == 0 ? 0 : -1);
1932 1932 }
1933 1933
1934 1934 static int
1935 1935 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
1936 1936 {
1937 1937 nvlist_t *value;
1938 1938 nvpair_t *pair;
1939 1939
1940 1940 value = zfs_get_clones_nvl(zhp);
1941 1941 if (value == NULL)
1942 1942 return (-1);
1943 1943
1944 1944 propbuf[0] = '\0';
1945 1945 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
1946 1946 pair = nvlist_next_nvpair(value, pair)) {
1947 1947 if (propbuf[0] != '\0')
1948 1948 (void) strlcat(propbuf, ",", proplen);
1949 1949 (void) strlcat(propbuf, nvpair_name(pair), proplen);
1950 1950 }
1951 1951
1952 1952 return (0);
1953 1953 }
1954 1954
1955 1955 struct get_clones_arg {
1956 1956 uint64_t numclones;
1957 1957 nvlist_t *value;
1958 1958 const char *origin;
1959 1959 char buf[ZFS_MAXNAMELEN];
1960 1960 };
1961 1961
1962 1962 int
1963 1963 get_clones_cb(zfs_handle_t *zhp, void *arg)
1964 1964 {
1965 1965 struct get_clones_arg *gca = arg;
1966 1966
1967 1967 if (gca->numclones == 0) {
1968 1968 zfs_close(zhp);
1969 1969 return (0);
1970 1970 }
1971 1971
1972 1972 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
1973 1973 NULL, NULL, 0, B_TRUE) != 0)
1974 1974 goto out;
1975 1975 if (strcmp(gca->buf, gca->origin) == 0) {
1976 1976 if (nvlist_add_boolean(gca->value, zfs_get_name(zhp)) != 0) {
1977 1977 zfs_close(zhp);
1978 1978 return (no_memory(zhp->zfs_hdl));
1979 1979 }
1980 1980 gca->numclones--;
1981 1981 }
1982 1982
1983 1983 out:
1984 1984 (void) zfs_iter_children(zhp, get_clones_cb, gca);
1985 1985 zfs_close(zhp);
1986 1986 return (0);
1987 1987 }
1988 1988
1989 1989 nvlist_t *
1990 1990 zfs_get_clones_nvl(zfs_handle_t *zhp)
1991 1991 {
1992 1992 nvlist_t *nv, *value;
1993 1993
1994 1994 if (nvlist_lookup_nvlist(zhp->zfs_props,
1995 1995 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
1996 1996 struct get_clones_arg gca;
1997 1997
1998 1998 /*
1999 1999 * if this is a snapshot, then the kernel wasn't able
2000 2000 * to get the clones. Do it by slowly iterating.
2001 2001 */
2002 2002 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2003 2003 return (NULL);
2004 2004 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2005 2005 return (NULL);
2006 2006 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2007 2007 nvlist_free(nv);
2008 2008 return (NULL);
2009 2009 }
2010 2010
2011 2011 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2012 2012 gca.value = value;
2013 2013 gca.origin = zhp->zfs_name;
2014 2014
2015 2015 if (gca.numclones != 0) {
2016 2016 zfs_handle_t *root;
2017 2017 char pool[ZFS_MAXNAMELEN];
2018 2018 char *cp = pool;
2019 2019
2020 2020 /* get the pool name */
2021 2021 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2022 2022 (void) strsep(&cp, "/@");
2023 2023 root = zfs_open(zhp->zfs_hdl, pool,
2024 2024 ZFS_TYPE_FILESYSTEM);
2025 2025
2026 2026 (void) get_clones_cb(root, &gca);
2027 2027 }
2028 2028
2029 2029 if (gca.numclones != 0 ||
2030 2030 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2031 2031 nvlist_add_nvlist(zhp->zfs_props,
2032 2032 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2033 2033 nvlist_free(nv);
2034 2034 nvlist_free(value);
2035 2035 return (NULL);
2036 2036 }
2037 2037 nvlist_free(nv);
2038 2038 nvlist_free(value);
2039 2039 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2040 2040 zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2041 2041 }
2042 2042
2043 2043 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2044 2044
2045 2045 return (value);
2046 2046 }
2047 2047
2048 2048 /*
2049 2049 * Retrieve a property from the given object. If 'literal' is specified, then
2050 2050 * numbers are left as exact values. Otherwise, numbers are converted to a
2051 2051 * human-readable form.
2052 2052 *
2053 2053 * Returns 0 on success, or -1 on error.
2054 2054 */
2055 2055 int
2056 2056 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2057 2057 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2058 2058 {
2059 2059 char *source = NULL;
2060 2060 uint64_t val;
2061 2061 char *str;
2062 2062 const char *strval;
2063 2063 boolean_t received = zfs_is_recvd_props_mode(zhp);
2064 2064 boolean_t printerr;
2065 2065
2066 2066 /*
2067 2067 * Check to see if this property applies to our object
2068 2068 */
2069 2069 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2070 2070 return (-1);
2071 2071
2072 2072 if (received && zfs_prop_readonly(prop))
2073 2073 return (-1);
2074 2074
2075 2075 if (zhp->zfs_hdl->libzfs_cachedprops &&
2076 2076 zfs_prop_cacheable(prop)) {
2077 2077 printerr = zhp->zfs_hdl->libzfs_printerr;
2078 2078 libzfs_print_on_error(zhp->zfs_hdl, B_FALSE);
2079 2079 (void) zfs_error(zhp->zfs_hdl, EZFS_PROPCACHED,
2080 2080 "property unavailable since not cached");
2081 2081 libzfs_print_on_error(zhp->zfs_hdl, printerr);
2082 2082 return (-1);
2083 2083 }
2084 2084
2085 2085 if (src)
2086 2086 *src = ZPROP_SRC_NONE;
2087 2087
2088 2088 switch (prop) {
2089 2089 case ZFS_PROP_CREATION:
2090 2090 /*
2091 2091 * 'creation' is a time_t stored in the statistics. We convert
2092 2092 * this into a string unless 'literal' is specified.
2093 2093 */
2094 2094 {
2095 2095 val = getprop_uint64(zhp, prop, &source);
2096 2096 time_t time = (time_t)val;
2097 2097 struct tm t;
2098 2098
2099 2099 if (literal ||
2100 2100 localtime_r(&time, &t) == NULL ||
2101 2101 strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2102 2102 &t) == 0)
2103 2103 (void) snprintf(propbuf, proplen, "%llu", val);
2104 2104 }
2105 2105 break;
2106 2106
2107 2107 case ZFS_PROP_MOUNTPOINT:
2108 2108 /*
2109 2109 * Getting the precise mountpoint can be tricky.
2110 2110 *
2111 2111 * - for 'none' or 'legacy', return those values.
2112 2112 * - for inherited mountpoints, we want to take everything
2113 2113 * after our ancestor and append it to the inherited value.
2114 2114 *
2115 2115 * If the pool has an alternate root, we want to prepend that
2116 2116 * root to any values we return.
2117 2117 */
2118 2118
2119 2119 str = getprop_string(zhp, prop, &source);
2120 2120
2121 2121 if (str[0] == '/') {
2122 2122 char buf[MAXPATHLEN];
2123 2123 char *root = buf;
2124 2124 const char *relpath;
2125 2125
2126 2126 /*
2127 2127 * If we inherit the mountpoint, even from a dataset
2128 2128 * with a received value, the source will be the path of
2129 2129 * the dataset we inherit from. If source is
2130 2130 * ZPROP_SOURCE_VAL_RECVD, the received value is not
2131 2131 * inherited.
2132 2132 */
2133 2133 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2134 2134 relpath = "";
2135 2135 } else {
2136 2136 relpath = zhp->zfs_name + strlen(source);
2137 2137 if (relpath[0] == '/')
2138 2138 relpath++;
2139 2139 }
2140 2140
2141 2141 if ((zpool_get_prop(zhp->zpool_hdl,
2142 2142 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2143 2143 B_FALSE)) || (strcmp(root, "-") == 0))
2144 2144 root[0] = '\0';
2145 2145 /*
2146 2146 * Special case an alternate root of '/'. This will
2147 2147 * avoid having multiple leading slashes in the
2148 2148 * mountpoint path.
2149 2149 */
2150 2150 if (strcmp(root, "/") == 0)
2151 2151 root++;
2152 2152
2153 2153 /*
2154 2154 * If the mountpoint is '/' then skip over this
2155 2155 * if we are obtaining either an alternate root or
2156 2156 * an inherited mountpoint.
2157 2157 */
2158 2158 if (str[1] == '\0' && (root[0] != '\0' ||
2159 2159 relpath[0] != '\0'))
2160 2160 str++;
2161 2161
2162 2162 if (relpath[0] == '\0')
2163 2163 (void) snprintf(propbuf, proplen, "%s%s",
2164 2164 root, str);
2165 2165 else
2166 2166 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2167 2167 root, str, relpath[0] == '@' ? "" : "/",
2168 2168 relpath);
2169 2169 } else {
2170 2170 /* 'legacy' or 'none' */
2171 2171 (void) strlcpy(propbuf, str, proplen);
2172 2172 }
2173 2173
2174 2174 break;
2175 2175
2176 2176 case ZFS_PROP_ORIGIN:
2177 2177 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source),
2178 2178 proplen);
2179 2179 /*
2180 2180 * If there is no parent at all, return failure to indicate that
2181 2181 * it doesn't apply to this dataset.
2182 2182 */
2183 2183 if (propbuf[0] == '\0')
2184 2184 return (-1);
2185 2185 break;
|
↓ open down ↓ |
2185 lines elided |
↑ open up ↑ |
2186 2186
2187 2187 case ZFS_PROP_CLONES:
2188 2188 if (get_clones_string(zhp, propbuf, proplen) != 0)
2189 2189 return (-1);
2190 2190 break;
2191 2191
2192 2192 case ZFS_PROP_QUOTA:
2193 2193 case ZFS_PROP_REFQUOTA:
2194 2194 case ZFS_PROP_RESERVATION:
2195 2195 case ZFS_PROP_REFRESERVATION:
2196 + case ZFS_PROP_DATASET_QUOTA:
2197 + case ZFS_PROP_SNAPSHOT_QUOTA:
2196 2198
2197 2199 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2198 2200 return (-1);
2199 2201
2200 2202 /*
2201 2203 * If quota or reservation is 0, we translate this into 'none'
2202 2204 * (unless literal is set), and indicate that it's the default
2203 2205 * value. Otherwise, we print the number nicely and indicate
2204 2206 * that its set locally.
2205 2207 */
2206 2208 if (val == 0) {
2207 2209 if (literal)
2208 2210 (void) strlcpy(propbuf, "0", proplen);
2209 2211 else
2210 2212 (void) strlcpy(propbuf, "none", proplen);
2211 2213 } else {
2212 2214 if (literal)
2213 2215 (void) snprintf(propbuf, proplen, "%llu",
2214 2216 (u_longlong_t)val);
2215 2217 else
2216 2218 zfs_nicenum(val, propbuf, proplen);
2217 2219 }
2218 2220 break;
2219 2221
2220 2222 case ZFS_PROP_REFRATIO:
2221 2223 case ZFS_PROP_COMPRESSRATIO:
2222 2224 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2223 2225 return (-1);
2224 2226 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2225 2227 (u_longlong_t)(val / 100),
2226 2228 (u_longlong_t)(val % 100));
2227 2229 break;
2228 2230
2229 2231 case ZFS_PROP_TYPE:
2230 2232 switch (zhp->zfs_type) {
2231 2233 case ZFS_TYPE_FILESYSTEM:
2232 2234 str = "filesystem";
2233 2235 break;
2234 2236 case ZFS_TYPE_VOLUME:
2235 2237 str = "volume";
2236 2238 break;
2237 2239 case ZFS_TYPE_SNAPSHOT:
2238 2240 str = "snapshot";
2239 2241 break;
2240 2242 default:
2241 2243 abort();
2242 2244 }
2243 2245 (void) snprintf(propbuf, proplen, "%s", str);
2244 2246 break;
2245 2247
2246 2248 case ZFS_PROP_MOUNTED:
2247 2249 /*
2248 2250 * The 'mounted' property is a pseudo-property that described
2249 2251 * whether the filesystem is currently mounted. Even though
2250 2252 * it's a boolean value, the typical values of "on" and "off"
2251 2253 * don't make sense, so we translate to "yes" and "no".
2252 2254 */
2253 2255 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2254 2256 src, &source, &val) != 0)
2255 2257 return (-1);
2256 2258 if (val)
2257 2259 (void) strlcpy(propbuf, "yes", proplen);
2258 2260 else
2259 2261 (void) strlcpy(propbuf, "no", proplen);
2260 2262 break;
2261 2263
2262 2264 case ZFS_PROP_NAME:
2263 2265 /*
2264 2266 * The 'name' property is a pseudo-property derived from the
2265 2267 * dataset name. It is presented as a real property to simplify
2266 2268 * consumers.
2267 2269 */
2268 2270 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2269 2271 break;
2270 2272
2271 2273 case ZFS_PROP_MLSLABEL:
2272 2274 {
2273 2275 m_label_t *new_sl = NULL;
2274 2276 char *ascii = NULL; /* human readable label */
2275 2277
2276 2278 (void) strlcpy(propbuf,
2277 2279 getprop_string(zhp, prop, &source), proplen);
2278 2280
2279 2281 if (literal || (strcasecmp(propbuf,
2280 2282 ZFS_MLSLABEL_DEFAULT) == 0))
2281 2283 break;
2282 2284
2283 2285 /*
2284 2286 * Try to translate the internal hex string to
2285 2287 * human-readable output. If there are any
2286 2288 * problems just use the hex string.
2287 2289 */
2288 2290
2289 2291 if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2290 2292 L_NO_CORRECTION, NULL) == -1) {
2291 2293 m_label_free(new_sl);
2292 2294 break;
2293 2295 }
2294 2296
2295 2297 if (label_to_str(new_sl, &ascii, M_LABEL,
2296 2298 DEF_NAMES) != 0) {
2297 2299 if (ascii)
2298 2300 free(ascii);
2299 2301 m_label_free(new_sl);
2300 2302 break;
2301 2303 }
2302 2304 m_label_free(new_sl);
2303 2305
2304 2306 (void) strlcpy(propbuf, ascii, proplen);
2305 2307 free(ascii);
2306 2308 }
2307 2309 break;
2308 2310
2309 2311 case ZFS_PROP_GUID:
2310 2312 /*
2311 2313 * GUIDs are stored as numbers, but they are identifiers.
2312 2314 * We don't want them to be pretty printed, because pretty
2313 2315 * printing mangles the ID into a truncated and useless value.
2314 2316 */
2315 2317 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2316 2318 return (-1);
2317 2319 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2318 2320 break;
2319 2321
2320 2322 default:
2321 2323 switch (zfs_prop_get_type(prop)) {
2322 2324 case PROP_TYPE_NUMBER:
2323 2325 if (get_numeric_property(zhp, prop, src,
2324 2326 &source, &val) != 0)
2325 2327 return (-1);
2326 2328 if (literal)
2327 2329 (void) snprintf(propbuf, proplen, "%llu",
2328 2330 (u_longlong_t)val);
2329 2331 else
2330 2332 zfs_nicenum(val, propbuf, proplen);
2331 2333 break;
2332 2334
2333 2335 case PROP_TYPE_STRING:
2334 2336 (void) strlcpy(propbuf,
2335 2337 getprop_string(zhp, prop, &source), proplen);
2336 2338 break;
2337 2339
2338 2340 case PROP_TYPE_INDEX:
2339 2341 if (get_numeric_property(zhp, prop, src,
2340 2342 &source, &val) != 0)
2341 2343 return (-1);
2342 2344 if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2343 2345 return (-1);
2344 2346 (void) strlcpy(propbuf, strval, proplen);
2345 2347 break;
2346 2348
2347 2349 default:
2348 2350 abort();
2349 2351 }
2350 2352 }
2351 2353
2352 2354 get_source(zhp, src, source, statbuf, statlen);
2353 2355
2354 2356 return (0);
2355 2357 }
2356 2358
2357 2359 /*
2358 2360 * Utility function to get the given numeric property. Does no validation that
2359 2361 * the given property is the appropriate type; should only be used with
2360 2362 * hard-coded property types.
2361 2363 */
2362 2364 uint64_t
2363 2365 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2364 2366 {
2365 2367 char *source;
2366 2368 uint64_t val;
2367 2369
2368 2370 (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2369 2371
2370 2372 return (val);
2371 2373 }
2372 2374
2373 2375 int
2374 2376 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2375 2377 {
2376 2378 char buf[64];
2377 2379
2378 2380 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2379 2381 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2380 2382 }
2381 2383
2382 2384 /*
2383 2385 * Similar to zfs_prop_get(), but returns the value as an integer.
2384 2386 */
2385 2387 int
2386 2388 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2387 2389 zprop_source_t *src, char *statbuf, size_t statlen)
2388 2390 {
2389 2391 char *source;
2390 2392
2391 2393 /*
2392 2394 * Check to see if this property applies to our object
2393 2395 */
2394 2396 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2395 2397 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2396 2398 dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2397 2399 zfs_prop_to_name(prop)));
2398 2400 }
2399 2401
2400 2402 if (src)
2401 2403 *src = ZPROP_SRC_NONE;
2402 2404
2403 2405 if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2404 2406 return (-1);
2405 2407
2406 2408 get_source(zhp, src, source, statbuf, statlen);
2407 2409
2408 2410 return (0);
2409 2411 }
2410 2412
2411 2413 static int
2412 2414 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2413 2415 char **domainp, idmap_rid_t *ridp)
2414 2416 {
2415 2417 idmap_get_handle_t *get_hdl = NULL;
2416 2418 idmap_stat status;
2417 2419 int err = EINVAL;
2418 2420
2419 2421 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2420 2422 goto out;
2421 2423
2422 2424 if (isuser) {
2423 2425 err = idmap_get_sidbyuid(get_hdl, id,
2424 2426 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2425 2427 } else {
2426 2428 err = idmap_get_sidbygid(get_hdl, id,
2427 2429 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2428 2430 }
2429 2431 if (err == IDMAP_SUCCESS &&
2430 2432 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2431 2433 status == IDMAP_SUCCESS)
2432 2434 err = 0;
2433 2435 else
2434 2436 err = EINVAL;
2435 2437 out:
2436 2438 if (get_hdl)
2437 2439 idmap_get_destroy(get_hdl);
2438 2440 return (err);
2439 2441 }
2440 2442
2441 2443 /*
2442 2444 * convert the propname into parameters needed by kernel
2443 2445 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2444 2446 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2445 2447 */
2446 2448 static int
2447 2449 userquota_propname_decode(const char *propname, boolean_t zoned,
2448 2450 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2449 2451 {
2450 2452 zfs_userquota_prop_t type;
2451 2453 char *cp, *end;
2452 2454 char *numericsid = NULL;
2453 2455 boolean_t isuser;
2454 2456
2455 2457 domain[0] = '\0';
2456 2458
2457 2459 /* Figure out the property type ({user|group}{quota|space}) */
2458 2460 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2459 2461 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2460 2462 strlen(zfs_userquota_prop_prefixes[type])) == 0)
2461 2463 break;
2462 2464 }
2463 2465 if (type == ZFS_NUM_USERQUOTA_PROPS)
2464 2466 return (EINVAL);
2465 2467 *typep = type;
2466 2468
2467 2469 isuser = (type == ZFS_PROP_USERQUOTA ||
2468 2470 type == ZFS_PROP_USERUSED);
2469 2471
2470 2472 cp = strchr(propname, '@') + 1;
2471 2473
2472 2474 if (strchr(cp, '@')) {
2473 2475 /*
2474 2476 * It's a SID name (eg "user@domain") that needs to be
2475 2477 * turned into S-1-domainID-RID.
2476 2478 */
2477 2479 directory_error_t e;
2478 2480 if (zoned && getzoneid() == GLOBAL_ZONEID)
2479 2481 return (ENOENT);
2480 2482 if (isuser) {
2481 2483 e = directory_sid_from_user_name(NULL,
2482 2484 cp, &numericsid);
2483 2485 } else {
2484 2486 e = directory_sid_from_group_name(NULL,
2485 2487 cp, &numericsid);
2486 2488 }
2487 2489 if (e != NULL) {
2488 2490 directory_error_free(e);
2489 2491 return (ENOENT);
2490 2492 }
2491 2493 if (numericsid == NULL)
2492 2494 return (ENOENT);
2493 2495 cp = numericsid;
2494 2496 /* will be further decoded below */
2495 2497 }
2496 2498
2497 2499 if (strncmp(cp, "S-1-", 4) == 0) {
2498 2500 /* It's a numeric SID (eg "S-1-234-567-89") */
2499 2501 (void) strlcpy(domain, cp, domainlen);
2500 2502 cp = strrchr(domain, '-');
2501 2503 *cp = '\0';
2502 2504 cp++;
2503 2505
2504 2506 errno = 0;
2505 2507 *ridp = strtoull(cp, &end, 10);
2506 2508 if (numericsid) {
2507 2509 free(numericsid);
2508 2510 numericsid = NULL;
2509 2511 }
2510 2512 if (errno != 0 || *end != '\0')
2511 2513 return (EINVAL);
2512 2514 } else if (!isdigit(*cp)) {
2513 2515 /*
2514 2516 * It's a user/group name (eg "user") that needs to be
2515 2517 * turned into a uid/gid
2516 2518 */
2517 2519 if (zoned && getzoneid() == GLOBAL_ZONEID)
2518 2520 return (ENOENT);
2519 2521 if (isuser) {
2520 2522 struct passwd *pw;
2521 2523 pw = getpwnam(cp);
2522 2524 if (pw == NULL)
2523 2525 return (ENOENT);
2524 2526 *ridp = pw->pw_uid;
2525 2527 } else {
2526 2528 struct group *gr;
2527 2529 gr = getgrnam(cp);
2528 2530 if (gr == NULL)
2529 2531 return (ENOENT);
2530 2532 *ridp = gr->gr_gid;
2531 2533 }
2532 2534 } else {
2533 2535 /* It's a user/group ID (eg "12345"). */
2534 2536 uid_t id = strtoul(cp, &end, 10);
2535 2537 idmap_rid_t rid;
2536 2538 char *mapdomain;
2537 2539
2538 2540 if (*end != '\0')
2539 2541 return (EINVAL);
2540 2542 if (id > MAXUID) {
2541 2543 /* It's an ephemeral ID. */
2542 2544 if (idmap_id_to_numeric_domain_rid(id, isuser,
2543 2545 &mapdomain, &rid) != 0)
2544 2546 return (ENOENT);
2545 2547 (void) strlcpy(domain, mapdomain, domainlen);
2546 2548 *ridp = rid;
2547 2549 } else {
2548 2550 *ridp = id;
2549 2551 }
2550 2552 }
2551 2553
2552 2554 ASSERT3P(numericsid, ==, NULL);
2553 2555 return (0);
2554 2556 }
2555 2557
2556 2558 static int
2557 2559 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2558 2560 uint64_t *propvalue, zfs_userquota_prop_t *typep)
2559 2561 {
2560 2562 int err;
2561 2563 zfs_cmd_t zc = { 0 };
2562 2564
2563 2565 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2564 2566
2565 2567 err = userquota_propname_decode(propname,
2566 2568 zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2567 2569 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2568 2570 zc.zc_objset_type = *typep;
2569 2571 if (err)
2570 2572 return (err);
2571 2573
2572 2574 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2573 2575 if (err)
2574 2576 return (err);
2575 2577
2576 2578 *propvalue = zc.zc_cookie;
2577 2579 return (0);
2578 2580 }
2579 2581
2580 2582 int
2581 2583 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2582 2584 uint64_t *propvalue)
2583 2585 {
2584 2586 zfs_userquota_prop_t type;
2585 2587
2586 2588 return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2587 2589 &type));
2588 2590 }
2589 2591
2590 2592 int
2591 2593 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2592 2594 char *propbuf, int proplen, boolean_t literal)
2593 2595 {
2594 2596 int err;
2595 2597 uint64_t propvalue;
2596 2598 zfs_userquota_prop_t type;
2597 2599
2598 2600 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2599 2601 &type);
2600 2602
2601 2603 if (err)
2602 2604 return (err);
2603 2605
2604 2606 if (literal) {
2605 2607 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2606 2608 } else if (propvalue == 0 &&
2607 2609 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2608 2610 (void) strlcpy(propbuf, "none", proplen);
2609 2611 } else {
2610 2612 zfs_nicenum(propvalue, propbuf, proplen);
2611 2613 }
2612 2614 return (0);
2613 2615 }
2614 2616
2615 2617 int
2616 2618 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2617 2619 uint64_t *propvalue)
2618 2620 {
2619 2621 int err;
2620 2622 zfs_cmd_t zc = { 0 };
2621 2623 const char *snapname;
2622 2624
2623 2625 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2624 2626
2625 2627 snapname = strchr(propname, '@') + 1;
2626 2628 if (strchr(snapname, '@')) {
2627 2629 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2628 2630 } else {
2629 2631 /* snapname is the short name, append it to zhp's fsname */
2630 2632 char *cp;
2631 2633
2632 2634 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2633 2635 sizeof (zc.zc_value));
2634 2636 cp = strchr(zc.zc_value, '@');
2635 2637 if (cp != NULL)
2636 2638 *cp = '\0';
2637 2639 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2638 2640 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2639 2641 }
2640 2642
2641 2643 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2642 2644 if (err)
2643 2645 return (err);
2644 2646
2645 2647 *propvalue = zc.zc_cookie;
2646 2648 return (0);
2647 2649 }
2648 2650
2649 2651 int
2650 2652 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2651 2653 char *propbuf, int proplen, boolean_t literal)
2652 2654 {
2653 2655 int err;
2654 2656 uint64_t propvalue;
2655 2657
2656 2658 err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2657 2659
2658 2660 if (err)
2659 2661 return (err);
2660 2662
2661 2663 if (literal) {
2662 2664 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2663 2665 } else {
2664 2666 zfs_nicenum(propvalue, propbuf, proplen);
2665 2667 }
2666 2668 return (0);
2667 2669 }
2668 2670
2669 2671 /*
2670 2672 * Returns the name of the given zfs handle.
2671 2673 */
2672 2674 const char *
2673 2675 zfs_get_name(const zfs_handle_t *zhp)
2674 2676 {
2675 2677 return (zhp->zfs_name);
2676 2678 }
2677 2679
2678 2680 /*
2679 2681 * Returns the type of the given zfs handle.
2680 2682 */
2681 2683 zfs_type_t
2682 2684 zfs_get_type(const zfs_handle_t *zhp)
2683 2685 {
2684 2686 return (zhp->zfs_type);
2685 2687 }
2686 2688
2687 2689 /*
2688 2690 * Is one dataset name a child dataset of another?
2689 2691 *
2690 2692 * Needs to handle these cases:
2691 2693 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo"
2692 2694 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar"
2693 2695 * Descendant? No. No. No. Yes.
2694 2696 */
2695 2697 static boolean_t
2696 2698 is_descendant(const char *ds1, const char *ds2)
2697 2699 {
2698 2700 size_t d1len = strlen(ds1);
2699 2701
2700 2702 /* ds2 can't be a descendant if it's smaller */
2701 2703 if (strlen(ds2) < d1len)
2702 2704 return (B_FALSE);
2703 2705
2704 2706 /* otherwise, compare strings and verify that there's a '/' char */
2705 2707 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2706 2708 }
2707 2709
2708 2710 /*
2709 2711 * Given a complete name, return just the portion that refers to the parent.
2710 2712 * Will return -1 if there is no parent (path is just the name of the
2711 2713 * pool).
2712 2714 */
2713 2715 static int
2714 2716 parent_name(const char *path, char *buf, size_t buflen)
2715 2717 {
2716 2718 char *slashp;
2717 2719
2718 2720 (void) strlcpy(buf, path, buflen);
2719 2721
2720 2722 if ((slashp = strrchr(buf, '/')) == NULL)
2721 2723 return (-1);
2722 2724 *slashp = '\0';
2723 2725
2724 2726 return (0);
2725 2727 }
2726 2728
2727 2729 /*
2728 2730 * If accept_ancestor is false, then check to make sure that the given path has
2729 2731 * a parent, and that it exists. If accept_ancestor is true, then find the
2730 2732 * closest existing ancestor for the given path. In prefixlen return the
2731 2733 * length of already existing prefix of the given path. We also fetch the
2732 2734 * 'zoned' property, which is used to validate property settings when creating
2733 2735 * new datasets.
2734 2736 */
2735 2737 static int
2736 2738 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
2737 2739 boolean_t accept_ancestor, int *prefixlen)
2738 2740 {
2739 2741 zfs_cmd_t zc = { 0 };
2740 2742 char parent[ZFS_MAXNAMELEN];
2741 2743 char *slash;
2742 2744 zfs_handle_t *zhp;
2743 2745 char errbuf[1024];
2744 2746 uint64_t is_zoned;
2745 2747
2746 2748 (void) snprintf(errbuf, sizeof (errbuf),
2747 2749 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
2748 2750
2749 2751 /* get parent, and check to see if this is just a pool */
2750 2752 if (parent_name(path, parent, sizeof (parent)) != 0) {
2751 2753 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2752 2754 "missing dataset name"));
2753 2755 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2754 2756 }
2755 2757
2756 2758 /* check to see if the pool exists */
2757 2759 if ((slash = strchr(parent, '/')) == NULL)
2758 2760 slash = parent + strlen(parent);
2759 2761 (void) strncpy(zc.zc_name, parent, slash - parent);
2760 2762 zc.zc_name[slash - parent] = '\0';
2761 2763 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
2762 2764 errno == ENOENT) {
2763 2765 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2764 2766 "no such pool '%s'"), zc.zc_name);
2765 2767 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2766 2768 }
2767 2769
2768 2770 /* check to see if the parent dataset exists */
2769 2771 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
2770 2772 if (errno == ENOENT && accept_ancestor) {
2771 2773 /*
2772 2774 * Go deeper to find an ancestor, give up on top level.
2773 2775 */
2774 2776 if (parent_name(parent, parent, sizeof (parent)) != 0) {
2775 2777 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2776 2778 "no such pool '%s'"), zc.zc_name);
2777 2779 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2778 2780 }
2779 2781 } else if (errno == ENOENT) {
2780 2782 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2781 2783 "parent does not exist"));
2782 2784 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2783 2785 } else
2784 2786 return (zfs_standard_error(hdl, errno, errbuf));
2785 2787 }
2786 2788
2787 2789 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2788 2790 if (zoned != NULL)
2789 2791 *zoned = is_zoned;
2790 2792
2791 2793 /* we are in a non-global zone, but parent is in the global zone */
2792 2794 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
2793 2795 (void) zfs_standard_error(hdl, EPERM, errbuf);
2794 2796 zfs_close(zhp);
2795 2797 return (-1);
2796 2798 }
2797 2799
2798 2800 /* make sure parent is a filesystem */
2799 2801 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
2800 2802 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2801 2803 "parent is not a filesystem"));
2802 2804 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
2803 2805 zfs_close(zhp);
2804 2806 return (-1);
2805 2807 }
2806 2808
2807 2809 zfs_close(zhp);
2808 2810 if (prefixlen != NULL)
2809 2811 *prefixlen = strlen(parent);
2810 2812 return (0);
2811 2813 }
2812 2814
2813 2815 /*
2814 2816 * Finds whether the dataset of the given type(s) exists.
2815 2817 */
2816 2818 boolean_t
2817 2819 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
2818 2820 {
2819 2821 zfs_handle_t *zhp;
2820 2822
2821 2823 if (!zfs_validate_name(hdl, path, types, B_FALSE))
2822 2824 return (B_FALSE);
2823 2825
2824 2826 /*
2825 2827 * Try to get stats for the dataset, which will tell us if it exists.
2826 2828 */
2827 2829 if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
2828 2830 int ds_type = zhp->zfs_type;
2829 2831
2830 2832 zfs_close(zhp);
2831 2833 if (types & ds_type)
2832 2834 return (B_TRUE);
2833 2835 }
2834 2836 return (B_FALSE);
2835 2837 }
2836 2838
2837 2839 /*
2838 2840 * Given a path to 'target', create all the ancestors between
2839 2841 * the prefixlen portion of the path, and the target itself.
2840 2842 * Fail if the initial prefixlen-ancestor does not already exist.
2841 2843 */
2842 2844 int
2843 2845 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
2844 2846 {
2845 2847 zfs_handle_t *h;
2846 2848 char *cp;
2847 2849 const char *opname;
2848 2850
2849 2851 /* make sure prefix exists */
2850 2852 cp = target + prefixlen;
2851 2853 if (*cp != '/') {
2852 2854 assert(strchr(cp, '/') == NULL);
2853 2855 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2854 2856 } else {
2855 2857 *cp = '\0';
2856 2858 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2857 2859 *cp = '/';
2858 2860 }
2859 2861 if (h == NULL)
2860 2862 return (-1);
2861 2863 zfs_close(h);
2862 2864
2863 2865 /*
2864 2866 * Attempt to create, mount, and share any ancestor filesystems,
2865 2867 * up to the prefixlen-long one.
2866 2868 */
2867 2869 for (cp = target + prefixlen + 1;
2868 2870 cp = strchr(cp, '/'); *cp = '/', cp++) {
2869 2871
2870 2872 *cp = '\0';
2871 2873
2872 2874 h = make_dataset_handle(hdl, target);
2873 2875 if (h) {
2874 2876 /* it already exists, nothing to do here */
2875 2877 zfs_close(h);
2876 2878 continue;
2877 2879 }
2878 2880
2879 2881 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
2880 2882 NULL) != 0) {
2881 2883 opname = dgettext(TEXT_DOMAIN, "create");
2882 2884 goto ancestorerr;
2883 2885 }
2884 2886
2885 2887 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2886 2888 if (h == NULL) {
2887 2889 opname = dgettext(TEXT_DOMAIN, "open");
2888 2890 goto ancestorerr;
2889 2891 }
2890 2892
2891 2893 if (zfs_mount(h, NULL, 0) != 0) {
2892 2894 opname = dgettext(TEXT_DOMAIN, "mount");
2893 2895 goto ancestorerr;
2894 2896 }
2895 2897
2896 2898 if (zfs_share(h) != 0) {
2897 2899 opname = dgettext(TEXT_DOMAIN, "share");
2898 2900 goto ancestorerr;
2899 2901 }
2900 2902
2901 2903 zfs_close(h);
2902 2904 }
2903 2905
2904 2906 return (0);
2905 2907
2906 2908 ancestorerr:
2907 2909 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2908 2910 "failed to %s ancestor '%s'"), opname, target);
2909 2911 return (-1);
2910 2912 }
2911 2913
2912 2914 /*
2913 2915 * Creates non-existing ancestors of the given path.
2914 2916 */
2915 2917 int
2916 2918 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
2917 2919 {
2918 2920 int prefix;
2919 2921 char *path_copy;
2920 2922 int rc;
2921 2923
2922 2924 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
2923 2925 return (-1);
2924 2926
2925 2927 if ((path_copy = strdup(path)) != NULL) {
2926 2928 rc = create_parents(hdl, path_copy, prefix);
2927 2929 free(path_copy);
2928 2930 }
2929 2931 if (path_copy == NULL || rc != 0)
2930 2932 return (-1);
2931 2933
2932 2934 return (0);
2933 2935 }
2934 2936
2935 2937 /*
2936 2938 * Create a new filesystem or volume.
2937 2939 */
2938 2940 int
2939 2941 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
2940 2942 nvlist_t *props)
2941 2943 {
2942 2944 int ret;
2943 2945 uint64_t size = 0;
2944 2946 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
2945 2947 char errbuf[1024];
2946 2948 uint64_t zoned;
2947 2949 dmu_objset_type_t ost;
2948 2950
2949 2951 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2950 2952 "cannot create '%s'"), path);
2951 2953
2952 2954 /* validate the path, taking care to note the extended error message */
2953 2955 if (!zfs_validate_name(hdl, path, type, B_TRUE))
2954 2956 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2955 2957
2956 2958 /* validate parents exist */
2957 2959 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
2958 2960 return (-1);
2959 2961
2960 2962 /*
2961 2963 * The failure modes when creating a dataset of a different type over
2962 2964 * one that already exists is a little strange. In particular, if you
2963 2965 * try to create a dataset on top of an existing dataset, the ioctl()
2964 2966 * will return ENOENT, not EEXIST. To prevent this from happening, we
2965 2967 * first try to see if the dataset exists.
2966 2968 */
2967 2969 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
2968 2970 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2969 2971 "dataset already exists"));
2970 2972 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
2971 2973 }
2972 2974
2973 2975 if (type == ZFS_TYPE_VOLUME)
2974 2976 ost = DMU_OST_ZVOL;
2975 2977 else
2976 2978 ost = DMU_OST_ZFS;
2977 2979
2978 2980 if (props && (props = zfs_valid_proplist(hdl, type, props,
2979 2981 zoned, NULL, errbuf)) == 0)
2980 2982 return (-1);
2981 2983
2982 2984 if (type == ZFS_TYPE_VOLUME) {
2983 2985 /*
2984 2986 * If we are creating a volume, the size and block size must
2985 2987 * satisfy a few restraints. First, the blocksize must be a
2986 2988 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the
2987 2989 * volsize must be a multiple of the block size, and cannot be
2988 2990 * zero.
2989 2991 */
2990 2992 if (props == NULL || nvlist_lookup_uint64(props,
2991 2993 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
2992 2994 nvlist_free(props);
2993 2995 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2994 2996 "missing volume size"));
2995 2997 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2996 2998 }
2997 2999
2998 3000 if ((ret = nvlist_lookup_uint64(props,
2999 3001 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3000 3002 &blocksize)) != 0) {
3001 3003 if (ret == ENOENT) {
3002 3004 blocksize = zfs_prop_default_numeric(
3003 3005 ZFS_PROP_VOLBLOCKSIZE);
3004 3006 } else {
3005 3007 nvlist_free(props);
3006 3008 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3007 3009 "missing volume block size"));
3008 3010 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3009 3011 }
3010 3012 }
3011 3013
3012 3014 if (size == 0) {
3013 3015 nvlist_free(props);
3014 3016 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3015 3017 "volume size cannot be zero"));
3016 3018 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3017 3019 }
3018 3020
3019 3021 if (size % blocksize != 0) {
3020 3022 nvlist_free(props);
3021 3023 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3022 3024 "volume size must be a multiple of volume block "
3023 3025 "size"));
3024 3026 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3025 3027 }
3026 3028 }
3027 3029
3028 3030 /* create the dataset */
3029 3031 ret = lzc_create(path, ost, props);
3030 3032 nvlist_free(props);
3031 3033
3032 3034 /* check for failure */
3033 3035 if (ret != 0) {
3034 3036 char parent[ZFS_MAXNAMELEN];
3035 3037 (void) parent_name(path, parent, sizeof (parent));
3036 3038
3037 3039 switch (errno) {
3038 3040 case ENOENT:
3039 3041 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3040 3042 "no such parent '%s'"), parent);
3041 3043 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3042 3044
3043 3045 case EINVAL:
3044 3046 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3045 3047 "parent '%s' is not a filesystem"), parent);
3046 3048 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3047 3049
3048 3050 case EDOM:
3049 3051 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3050 3052 "volume block size must be power of 2 from "
3051 3053 "%u to %uk"),
3052 3054 (uint_t)SPA_MINBLOCKSIZE,
3053 3055 (uint_t)SPA_MAXBLOCKSIZE >> 10);
3054 3056
3055 3057 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3056 3058
3057 3059 case ENOTSUP:
3058 3060 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3059 3061 "pool must be upgraded to set this "
3060 3062 "property or value"));
3061 3063 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3062 3064 #ifdef _ILP32
3063 3065 case EOVERFLOW:
3064 3066 /*
3065 3067 * This platform can't address a volume this big.
3066 3068 */
3067 3069 if (type == ZFS_TYPE_VOLUME)
3068 3070 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3069 3071 errbuf));
3070 3072 #endif
3071 3073 /* FALLTHROUGH */
3072 3074 default:
3073 3075 return (zfs_standard_error(hdl, errno, errbuf));
3074 3076 }
3075 3077 }
3076 3078
3077 3079 return (0);
3078 3080 }
3079 3081
3080 3082 /*
3081 3083 * Destroys the given dataset. The caller must make sure that the filesystem
3082 3084 * isn't mounted, and that there are no active dependents. If the file system
3083 3085 * does not exist this function does nothing.
3084 3086 */
3085 3087 int
3086 3088 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3087 3089 {
3088 3090 zfs_cmd_t zc = { 0 };
3089 3091
3090 3092 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3091 3093
3092 3094 if (ZFS_IS_VOLUME(zhp)) {
3093 3095 zc.zc_objset_type = DMU_OST_ZVOL;
3094 3096 } else {
3095 3097 zc.zc_objset_type = DMU_OST_ZFS;
3096 3098 }
3097 3099
3098 3100 zc.zc_defer_destroy = defer;
3099 3101 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3100 3102 errno != ENOENT) {
3101 3103 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3102 3104 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3103 3105 zhp->zfs_name));
3104 3106 }
3105 3107
3106 3108 remove_mountpoint(zhp);
3107 3109
3108 3110 return (0);
3109 3111 }
3110 3112
3111 3113 struct destroydata {
3112 3114 nvlist_t *nvl;
3113 3115 const char *snapname;
3114 3116 };
3115 3117
3116 3118 static int
3117 3119 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3118 3120 {
3119 3121 struct destroydata *dd = arg;
3120 3122 zfs_handle_t *szhp;
3121 3123 char name[ZFS_MAXNAMELEN];
3122 3124 int rv = 0;
3123 3125
3124 3126 (void) snprintf(name, sizeof (name),
3125 3127 "%s@%s", zhp->zfs_name, dd->snapname);
3126 3128
3127 3129 szhp = make_dataset_handle(zhp->zfs_hdl, name);
3128 3130 if (szhp) {
3129 3131 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3130 3132 zfs_close(szhp);
3131 3133 }
3132 3134
3133 3135 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3134 3136 zfs_close(zhp);
3135 3137 return (rv);
3136 3138 }
3137 3139
3138 3140 /*
3139 3141 * Destroys all snapshots with the given name in zhp & descendants.
3140 3142 */
3141 3143 int
3142 3144 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3143 3145 {
3144 3146 int ret;
3145 3147 struct destroydata dd = { 0 };
3146 3148
3147 3149 dd.snapname = snapname;
3148 3150 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3149 3151 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3150 3152
3151 3153 if (nvlist_next_nvpair(dd.nvl, NULL) == NULL) {
3152 3154 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3153 3155 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3154 3156 zhp->zfs_name, snapname);
3155 3157 } else {
3156 3158 ret = zfs_destroy_snaps_nvl(zhp, dd.nvl, defer);
3157 3159 }
3158 3160 nvlist_free(dd.nvl);
3159 3161 return (ret);
3160 3162 }
3161 3163
3162 3164 /*
3163 3165 * Destroys all the snapshots named in the nvlist. They must be underneath
3164 3166 * the zhp (either snapshots of it, or snapshots of its descendants).
3165 3167 */
3166 3168 int
3167 3169 zfs_destroy_snaps_nvl(zfs_handle_t *zhp, nvlist_t *snaps, boolean_t defer)
3168 3170 {
3169 3171 int ret;
3170 3172 nvlist_t *errlist;
3171 3173
3172 3174 ret = lzc_destroy_snaps(snaps, defer, &errlist);
3173 3175
3174 3176 if (ret != 0) {
3175 3177 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3176 3178 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3177 3179 char errbuf[1024];
3178 3180 (void) snprintf(errbuf, sizeof (errbuf),
3179 3181 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3180 3182 nvpair_name(pair));
3181 3183
3182 3184 switch (fnvpair_value_int32(pair)) {
3183 3185 case EEXIST:
3184 3186 zfs_error_aux(zhp->zfs_hdl,
3185 3187 dgettext(TEXT_DOMAIN,
3186 3188 "snapshot is cloned"));
3187 3189 ret = zfs_error(zhp->zfs_hdl, EZFS_EXISTS,
3188 3190 errbuf);
3189 3191 break;
3190 3192 default:
3191 3193 ret = zfs_standard_error(zhp->zfs_hdl, errno,
3192 3194 errbuf);
3193 3195 break;
3194 3196 }
3195 3197 }
3196 3198 }
3197 3199
3198 3200 return (ret);
3199 3201 }
3200 3202
3201 3203 /*
3202 3204 * Clones the given dataset. The target must be of the same type as the source.
3203 3205 */
3204 3206 int
3205 3207 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3206 3208 {
3207 3209 char parent[ZFS_MAXNAMELEN];
3208 3210 int ret;
3209 3211 char errbuf[1024];
3210 3212 libzfs_handle_t *hdl = zhp->zfs_hdl;
3211 3213 uint64_t zoned;
3212 3214
3213 3215 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3214 3216
3215 3217 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3216 3218 "cannot create '%s'"), target);
3217 3219
3218 3220 /* validate the target/clone name */
3219 3221 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3220 3222 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3221 3223
3222 3224 /* validate parents exist */
3223 3225 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3224 3226 return (-1);
3225 3227
3226 3228 (void) parent_name(target, parent, sizeof (parent));
3227 3229
3228 3230 /* do the clone */
3229 3231
3230 3232 if (props) {
3231 3233 zfs_type_t type;
3232 3234 if (ZFS_IS_VOLUME(zhp)) {
3233 3235 type = ZFS_TYPE_VOLUME;
3234 3236 } else {
3235 3237 type = ZFS_TYPE_FILESYSTEM;
3236 3238 }
3237 3239 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3238 3240 zhp, errbuf)) == NULL)
3239 3241 return (-1);
3240 3242 }
3241 3243
3242 3244 ret = lzc_clone(target, zhp->zfs_name, props);
3243 3245 nvlist_free(props);
3244 3246
3245 3247 if (ret != 0) {
3246 3248 switch (errno) {
3247 3249
3248 3250 case ENOENT:
3249 3251 /*
3250 3252 * The parent doesn't exist. We should have caught this
3251 3253 * above, but there may a race condition that has since
3252 3254 * destroyed the parent.
3253 3255 *
3254 3256 * At this point, we don't know whether it's the source
3255 3257 * that doesn't exist anymore, or whether the target
3256 3258 * dataset doesn't exist.
3257 3259 */
3258 3260 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3259 3261 "no such parent '%s'"), parent);
3260 3262 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3261 3263
3262 3264 case EXDEV:
3263 3265 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3264 3266 "source and target pools differ"));
3265 3267 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3266 3268 errbuf));
3267 3269
3268 3270 default:
3269 3271 return (zfs_standard_error(zhp->zfs_hdl, errno,
3270 3272 errbuf));
3271 3273 }
3272 3274 }
3273 3275
3274 3276 return (ret);
3275 3277 }
3276 3278
3277 3279 /*
3278 3280 * Promotes the given clone fs to be the clone parent.
3279 3281 */
3280 3282 int
3281 3283 zfs_promote(zfs_handle_t *zhp)
3282 3284 {
3283 3285 libzfs_handle_t *hdl = zhp->zfs_hdl;
3284 3286 zfs_cmd_t zc = { 0 };
3285 3287 char parent[MAXPATHLEN];
3286 3288 int ret;
3287 3289 char errbuf[1024];
3288 3290
3289 3291 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3290 3292 "cannot promote '%s'"), zhp->zfs_name);
3291 3293
3292 3294 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3293 3295 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3294 3296 "snapshots can not be promoted"));
3295 3297 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3296 3298 }
3297 3299
3298 3300 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3299 3301 if (parent[0] == '\0') {
3300 3302 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3301 3303 "not a cloned filesystem"));
3302 3304 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3303 3305 }
3304 3306
3305 3307 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3306 3308 sizeof (zc.zc_value));
3307 3309 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3308 3310 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3309 3311
3310 3312 if (ret != 0) {
3311 3313 int save_errno = errno;
3312 3314
3313 3315 switch (save_errno) {
3314 3316 case EEXIST:
3315 3317 /* There is a conflicting snapshot name. */
3316 3318 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3317 3319 "conflicting snapshot '%s' from parent '%s'"),
3318 3320 zc.zc_string, parent);
3319 3321 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3320 3322
3321 3323 default:
3322 3324 return (zfs_standard_error(hdl, save_errno, errbuf));
3323 3325 }
3324 3326 }
3325 3327 return (ret);
3326 3328 }
3327 3329
3328 3330 typedef struct snapdata {
3329 3331 nvlist_t *sd_nvl;
3330 3332 const char *sd_snapname;
3331 3333 } snapdata_t;
3332 3334
3333 3335 static int
3334 3336 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3335 3337 {
3336 3338 snapdata_t *sd = arg;
3337 3339 char name[ZFS_MAXNAMELEN];
3338 3340 int rv = 0;
3339 3341
3340 3342 (void) snprintf(name, sizeof (name),
3341 3343 "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3342 3344
3343 3345 fnvlist_add_boolean(sd->sd_nvl, name);
3344 3346
3345 3347 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3346 3348 zfs_close(zhp);
3347 3349 return (rv);
3348 3350 }
3349 3351
3350 3352 /*
3351 3353 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be
3352 3354 * created.
3353 3355 */
3354 3356 int
3355 3357 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3356 3358 {
3357 3359 int ret;
3358 3360 char errbuf[1024];
3359 3361 nvpair_t *elem;
3360 3362 nvlist_t *errors;
3361 3363
3362 3364 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3363 3365 "cannot create snapshots "));
3364 3366
3365 3367 elem = NULL;
3366 3368 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3367 3369 const char *snapname = nvpair_name(elem);
3368 3370
3369 3371 /* validate the target name */
3370 3372 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3371 3373 B_TRUE)) {
3372 3374 (void) snprintf(errbuf, sizeof (errbuf),
3373 3375 dgettext(TEXT_DOMAIN,
3374 3376 "cannot create snapshot '%s'"), snapname);
3375 3377 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3376 3378 }
3377 3379 }
3378 3380
3379 3381 if (props != NULL &&
3380 3382 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3381 3383 props, B_FALSE, NULL, errbuf)) == NULL) {
3382 3384 return (-1);
3383 3385 }
3384 3386
3385 3387 ret = lzc_snapshot(snaps, props, &errors);
3386 3388
3387 3389 if (ret != 0) {
3388 3390 boolean_t printed = B_FALSE;
3389 3391 for (elem = nvlist_next_nvpair(errors, NULL);
3390 3392 elem != NULL;
3391 3393 elem = nvlist_next_nvpair(errors, elem)) {
3392 3394 (void) snprintf(errbuf, sizeof (errbuf),
3393 3395 dgettext(TEXT_DOMAIN,
3394 3396 "cannot create snapshot '%s'"), nvpair_name(elem));
3395 3397 (void) zfs_standard_error(hdl,
3396 3398 fnvpair_value_int32(elem), errbuf);
3397 3399 printed = B_TRUE;
3398 3400 }
3399 3401 if (!printed) {
3400 3402 switch (ret) {
3401 3403 case EXDEV:
3402 3404 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3403 3405 "multiple snapshots of same "
3404 3406 "fs not allowed"));
3405 3407 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3406 3408
3407 3409 break;
3408 3410 default:
3409 3411 (void) zfs_standard_error(hdl, ret, errbuf);
3410 3412 }
3411 3413 }
3412 3414 }
3413 3415
3414 3416 nvlist_free(props);
3415 3417 nvlist_free(errors);
3416 3418 return (ret);
3417 3419 }
3418 3420
3419 3421 int
3420 3422 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3421 3423 nvlist_t *props)
3422 3424 {
3423 3425 int ret;
3424 3426 snapdata_t sd = { 0 };
3425 3427 char fsname[ZFS_MAXNAMELEN];
3426 3428 char *cp;
3427 3429 zfs_handle_t *zhp;
3428 3430 char errbuf[1024];
3429 3431
3430 3432 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3431 3433 "cannot snapshot %s"), path);
3432 3434
3433 3435 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3434 3436 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3435 3437
3436 3438 (void) strlcpy(fsname, path, sizeof (fsname));
3437 3439 cp = strchr(fsname, '@');
3438 3440 *cp = '\0';
3439 3441 sd.sd_snapname = cp + 1;
3440 3442
3441 3443 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3442 3444 ZFS_TYPE_VOLUME)) == NULL) {
3443 3445 return (-1);
3444 3446 }
3445 3447
3446 3448 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3447 3449 if (recursive) {
3448 3450 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3449 3451 } else {
3450 3452 fnvlist_add_boolean(sd.sd_nvl, path);
3451 3453 }
3452 3454
3453 3455 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3454 3456 nvlist_free(sd.sd_nvl);
3455 3457 zfs_close(zhp);
3456 3458 return (ret);
3457 3459 }
3458 3460
3459 3461 /*
3460 3462 * Destroy any more recent snapshots. We invoke this callback on any dependents
3461 3463 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this
3462 3464 * is a dependent and we should just destroy it without checking the transaction
3463 3465 * group.
3464 3466 */
3465 3467 typedef struct rollback_data {
3466 3468 const char *cb_target; /* the snapshot */
3467 3469 uint64_t cb_create; /* creation time reference */
3468 3470 boolean_t cb_error;
3469 3471 boolean_t cb_dependent;
3470 3472 boolean_t cb_force;
3471 3473 } rollback_data_t;
3472 3474
3473 3475 static int
3474 3476 rollback_destroy(zfs_handle_t *zhp, void *data)
3475 3477 {
3476 3478 rollback_data_t *cbp = data;
3477 3479
3478 3480 if (!cbp->cb_dependent) {
3479 3481 if (strcmp(zhp->zfs_name, cbp->cb_target) != 0 &&
3480 3482 zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3481 3483 zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3482 3484 cbp->cb_create) {
3483 3485
3484 3486 cbp->cb_dependent = B_TRUE;
3485 3487 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3486 3488 rollback_destroy, cbp);
3487 3489 cbp->cb_dependent = B_FALSE;
3488 3490
3489 3491 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3490 3492 }
3491 3493 } else {
3492 3494 /* We must destroy this clone; first unmount it */
3493 3495 prop_changelist_t *clp;
3494 3496
3495 3497 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3496 3498 cbp->cb_force ? MS_FORCE: 0);
3497 3499 if (clp == NULL || changelist_prefix(clp) != 0) {
3498 3500 cbp->cb_error = B_TRUE;
3499 3501 zfs_close(zhp);
3500 3502 return (0);
3501 3503 }
3502 3504 if (zfs_destroy(zhp, B_FALSE) != 0)
3503 3505 cbp->cb_error = B_TRUE;
3504 3506 else
3505 3507 changelist_remove(clp, zhp->zfs_name);
3506 3508 (void) changelist_postfix(clp);
3507 3509 changelist_free(clp);
3508 3510 }
3509 3511
3510 3512 zfs_close(zhp);
3511 3513 return (0);
3512 3514 }
3513 3515
3514 3516 /*
3515 3517 * Given a dataset, rollback to a specific snapshot, discarding any
3516 3518 * data changes since then and making it the active dataset.
3517 3519 *
3518 3520 * Any snapshots more recent than the target are destroyed, along with
3519 3521 * their dependents.
3520 3522 */
3521 3523 int
3522 3524 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3523 3525 {
3524 3526 rollback_data_t cb = { 0 };
3525 3527 int err;
3526 3528 zfs_cmd_t zc = { 0 };
3527 3529 boolean_t restore_resv = 0;
3528 3530 uint64_t old_volsize, new_volsize;
3529 3531 zfs_prop_t resv_prop;
3530 3532
3531 3533 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3532 3534 zhp->zfs_type == ZFS_TYPE_VOLUME);
3533 3535
3534 3536 /*
3535 3537 * Destroy all recent snapshots and their dependents.
3536 3538 */
3537 3539 cb.cb_force = force;
3538 3540 cb.cb_target = snap->zfs_name;
3539 3541 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3540 3542 (void) zfs_iter_children(zhp, rollback_destroy, &cb);
3541 3543
3542 3544 if (cb.cb_error)
3543 3545 return (-1);
3544 3546
3545 3547 /*
3546 3548 * Now that we have verified that the snapshot is the latest,
3547 3549 * rollback to the given snapshot.
3548 3550 */
3549 3551
3550 3552 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3551 3553 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3552 3554 return (-1);
3553 3555 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3554 3556 restore_resv =
3555 3557 (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3556 3558 }
3557 3559
3558 3560 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3559 3561
3560 3562 if (ZFS_IS_VOLUME(zhp))
3561 3563 zc.zc_objset_type = DMU_OST_ZVOL;
3562 3564 else
3563 3565 zc.zc_objset_type = DMU_OST_ZFS;
3564 3566
3565 3567 /*
3566 3568 * We rely on zfs_iter_children() to verify that there are no
3567 3569 * newer snapshots for the given dataset. Therefore, we can
3568 3570 * simply pass the name on to the ioctl() call. There is still
3569 3571 * an unlikely race condition where the user has taken a
3570 3572 * snapshot since we verified that this was the most recent.
3571 3573 *
3572 3574 */
3573 3575 if ((err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_ROLLBACK, &zc)) != 0) {
3574 3576 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3575 3577 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3576 3578 zhp->zfs_name);
3577 3579 return (err);
3578 3580 }
3579 3581
3580 3582 /*
3581 3583 * For volumes, if the pre-rollback volsize matched the pre-
3582 3584 * rollback reservation and the volsize has changed then set
3583 3585 * the reservation property to the post-rollback volsize.
3584 3586 * Make a new handle since the rollback closed the dataset.
3585 3587 */
3586 3588 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3587 3589 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3588 3590 if (restore_resv) {
3589 3591 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3590 3592 if (old_volsize != new_volsize)
3591 3593 err = zfs_prop_set_int(zhp, resv_prop,
3592 3594 new_volsize);
3593 3595 }
3594 3596 zfs_close(zhp);
3595 3597 }
3596 3598 return (err);
3597 3599 }
3598 3600
3599 3601 /*
3600 3602 * Renames the given dataset.
3601 3603 */
3602 3604 int
3603 3605 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
3604 3606 boolean_t force_unmount)
3605 3607 {
3606 3608 int ret;
3607 3609 zfs_cmd_t zc = { 0 };
3608 3610 char *delim;
3609 3611 prop_changelist_t *cl = NULL;
3610 3612 zfs_handle_t *zhrp = NULL;
3611 3613 char *parentname = NULL;
3612 3614 char parent[ZFS_MAXNAMELEN];
3613 3615 libzfs_handle_t *hdl = zhp->zfs_hdl;
3614 3616 char errbuf[1024];
3615 3617
3616 3618 /* if we have the same exact name, just return success */
3617 3619 if (strcmp(zhp->zfs_name, target) == 0)
3618 3620 return (0);
3619 3621
3620 3622 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3621 3623 "cannot rename to '%s'"), target);
3622 3624
3623 3625 /*
3624 3626 * Make sure the target name is valid
3625 3627 */
3626 3628 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3627 3629 if ((strchr(target, '@') == NULL) ||
3628 3630 *target == '@') {
3629 3631 /*
3630 3632 * Snapshot target name is abbreviated,
3631 3633 * reconstruct full dataset name
3632 3634 */
3633 3635 (void) strlcpy(parent, zhp->zfs_name,
3634 3636 sizeof (parent));
3635 3637 delim = strchr(parent, '@');
3636 3638 if (strchr(target, '@') == NULL)
3637 3639 *(++delim) = '\0';
3638 3640 else
3639 3641 *delim = '\0';
3640 3642 (void) strlcat(parent, target, sizeof (parent));
3641 3643 target = parent;
3642 3644 } else {
3643 3645 /*
3644 3646 * Make sure we're renaming within the same dataset.
3645 3647 */
3646 3648 delim = strchr(target, '@');
3647 3649 if (strncmp(zhp->zfs_name, target, delim - target)
3648 3650 != 0 || zhp->zfs_name[delim - target] != '@') {
3649 3651 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3650 3652 "snapshots must be part of same "
3651 3653 "dataset"));
3652 3654 return (zfs_error(hdl, EZFS_CROSSTARGET,
3653 3655 errbuf));
3654 3656 }
3655 3657 }
3656 3658 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3657 3659 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3658 3660 } else {
3659 3661 if (recursive) {
3660 3662 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3661 3663 "recursive rename must be a snapshot"));
3662 3664 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3663 3665 }
3664 3666
3665 3667 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3666 3668 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3667 3669
3668 3670 /* validate parents */
3669 3671 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3670 3672 return (-1);
3671 3673
3672 3674 /* make sure we're in the same pool */
3673 3675 verify((delim = strchr(target, '/')) != NULL);
3674 3676 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3675 3677 zhp->zfs_name[delim - target] != '/') {
3676 3678 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3677 3679 "datasets must be within same pool"));
3678 3680 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3679 3681 }
3680 3682
3681 3683 /* new name cannot be a child of the current dataset name */
3682 3684 if (is_descendant(zhp->zfs_name, target)) {
3683 3685 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3684 3686 "New dataset name cannot be a descendant of "
3685 3687 "current dataset name"));
3686 3688 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3687 3689 }
3688 3690 }
3689 3691
3690 3692 (void) snprintf(errbuf, sizeof (errbuf),
3691 3693 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3692 3694
3693 3695 if (getzoneid() == GLOBAL_ZONEID &&
3694 3696 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3695 3697 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3696 3698 "dataset is used in a non-global zone"));
3697 3699 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3698 3700 }
3699 3701
3700 3702 if (recursive) {
3701 3703
3702 3704 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3703 3705 if (parentname == NULL) {
3704 3706 ret = -1;
3705 3707 goto error;
3706 3708 }
3707 3709 delim = strchr(parentname, '@');
3708 3710 *delim = '\0';
3709 3711 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
3710 3712 if (zhrp == NULL) {
3711 3713 ret = -1;
3712 3714 goto error;
3713 3715 }
3714 3716
3715 3717 } else {
3716 3718 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3717 3719 force_unmount ? MS_FORCE : 0)) == NULL)
3718 3720 return (-1);
3719 3721
3720 3722 if (changelist_haszonedchild(cl)) {
3721 3723 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3722 3724 "child dataset with inherited mountpoint is used "
3723 3725 "in a non-global zone"));
3724 3726 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
3725 3727 goto error;
3726 3728 }
3727 3729
3728 3730 if ((ret = changelist_prefix(cl)) != 0)
3729 3731 goto error;
3730 3732 }
3731 3733
3732 3734 if (ZFS_IS_VOLUME(zhp))
3733 3735 zc.zc_objset_type = DMU_OST_ZVOL;
3734 3736 else
3735 3737 zc.zc_objset_type = DMU_OST_ZFS;
3736 3738
3737 3739 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3738 3740 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
3739 3741
3740 3742 zc.zc_cookie = recursive;
3741 3743
3742 3744 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
3743 3745 /*
3744 3746 * if it was recursive, the one that actually failed will
3745 3747 * be in zc.zc_name
3746 3748 */
3747 3749 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3748 3750 "cannot rename '%s'"), zc.zc_name);
3749 3751
3750 3752 if (recursive && errno == EEXIST) {
3751 3753 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3752 3754 "a child dataset already has a snapshot "
3753 3755 "with the new name"));
3754 3756 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3755 3757 } else {
3756 3758 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
3757 3759 }
3758 3760
3759 3761 /*
3760 3762 * On failure, we still want to remount any filesystems that
3761 3763 * were previously mounted, so we don't alter the system state.
3762 3764 */
3763 3765 if (!recursive)
3764 3766 (void) changelist_postfix(cl);
3765 3767 } else {
3766 3768 if (!recursive) {
3767 3769 changelist_rename(cl, zfs_get_name(zhp), target);
3768 3770 ret = changelist_postfix(cl);
3769 3771 }
3770 3772 }
3771 3773
3772 3774 error:
3773 3775 if (parentname) {
3774 3776 free(parentname);
3775 3777 }
3776 3778 if (zhrp) {
3777 3779 zfs_close(zhrp);
3778 3780 }
3779 3781 if (cl) {
3780 3782 changelist_free(cl);
3781 3783 }
3782 3784 return (ret);
3783 3785 }
3784 3786
3785 3787 nvlist_t *
3786 3788 zfs_get_user_props(zfs_handle_t *zhp)
3787 3789 {
3788 3790 return (zhp->zfs_user_props);
3789 3791 }
3790 3792
3791 3793 nvlist_t *
3792 3794 zfs_get_recvd_props(zfs_handle_t *zhp)
3793 3795 {
3794 3796 if (zhp->zfs_recvd_props == NULL)
3795 3797 if (get_recvd_props_ioctl(zhp) != 0)
3796 3798 return (NULL);
3797 3799 return (zhp->zfs_recvd_props);
3798 3800 }
3799 3801
3800 3802 /*
3801 3803 * This function is used by 'zfs list' to determine the exact set of columns to
3802 3804 * display, and their maximum widths. This does two main things:
3803 3805 *
3804 3806 * - If this is a list of all properties, then expand the list to include
3805 3807 * all native properties, and set a flag so that for each dataset we look
3806 3808 * for new unique user properties and add them to the list.
3807 3809 *
3808 3810 * - For non fixed-width properties, keep track of the maximum width seen
3809 3811 * so that we can size the column appropriately. If the user has
3810 3812 * requested received property values, we also need to compute the width
3811 3813 * of the RECEIVED column.
3812 3814 */
3813 3815 int
3814 3816 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received)
3815 3817 {
3816 3818 libzfs_handle_t *hdl = zhp->zfs_hdl;
3817 3819 zprop_list_t *entry;
3818 3820 zprop_list_t **last, **start;
3819 3821 nvlist_t *userprops, *propval;
3820 3822 nvpair_t *elem;
3821 3823 char *strval;
3822 3824 char buf[ZFS_MAXPROPLEN];
3823 3825
3824 3826 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
3825 3827 return (-1);
3826 3828
3827 3829 userprops = zfs_get_user_props(zhp);
3828 3830
3829 3831 entry = *plp;
3830 3832 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
3831 3833 /*
3832 3834 * Go through and add any user properties as necessary. We
3833 3835 * start by incrementing our list pointer to the first
3834 3836 * non-native property.
3835 3837 */
3836 3838 start = plp;
3837 3839 while (*start != NULL) {
3838 3840 if ((*start)->pl_prop == ZPROP_INVAL)
3839 3841 break;
3840 3842 start = &(*start)->pl_next;
3841 3843 }
3842 3844
3843 3845 elem = NULL;
3844 3846 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
3845 3847 /*
3846 3848 * See if we've already found this property in our list.
3847 3849 */
3848 3850 for (last = start; *last != NULL;
3849 3851 last = &(*last)->pl_next) {
3850 3852 if (strcmp((*last)->pl_user_prop,
3851 3853 nvpair_name(elem)) == 0)
3852 3854 break;
3853 3855 }
3854 3856
3855 3857 if (*last == NULL) {
3856 3858 if ((entry = zfs_alloc(hdl,
3857 3859 sizeof (zprop_list_t))) == NULL ||
3858 3860 ((entry->pl_user_prop = zfs_strdup(hdl,
3859 3861 nvpair_name(elem)))) == NULL) {
3860 3862 free(entry);
3861 3863 return (-1);
3862 3864 }
3863 3865
3864 3866 entry->pl_prop = ZPROP_INVAL;
3865 3867 entry->pl_width = strlen(nvpair_name(elem));
3866 3868 entry->pl_all = B_TRUE;
3867 3869 *last = entry;
3868 3870 }
3869 3871 }
3870 3872 }
3871 3873
3872 3874 /*
3873 3875 * Now go through and check the width of any non-fixed columns
3874 3876 */
3875 3877 for (entry = *plp; entry != NULL; entry = entry->pl_next) {
3876 3878 if (entry->pl_fixed)
3877 3879 continue;
3878 3880
3879 3881 if (entry->pl_prop != ZPROP_INVAL) {
3880 3882 if (zfs_prop_get(zhp, entry->pl_prop,
3881 3883 buf, sizeof (buf), NULL, NULL, 0, B_FALSE) == 0) {
3882 3884 if (strlen(buf) > entry->pl_width)
3883 3885 entry->pl_width = strlen(buf);
3884 3886 }
3885 3887 if (received && zfs_prop_get_recvd(zhp,
3886 3888 zfs_prop_to_name(entry->pl_prop),
3887 3889 buf, sizeof (buf), B_FALSE) == 0)
3888 3890 if (strlen(buf) > entry->pl_recvd_width)
3889 3891 entry->pl_recvd_width = strlen(buf);
3890 3892 } else {
3891 3893 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
3892 3894 &propval) == 0) {
3893 3895 verify(nvlist_lookup_string(propval,
3894 3896 ZPROP_VALUE, &strval) == 0);
3895 3897 if (strlen(strval) > entry->pl_width)
3896 3898 entry->pl_width = strlen(strval);
3897 3899 }
3898 3900 if (received && zfs_prop_get_recvd(zhp,
3899 3901 entry->pl_user_prop,
3900 3902 buf, sizeof (buf), B_FALSE) == 0)
3901 3903 if (strlen(buf) > entry->pl_recvd_width)
3902 3904 entry->pl_recvd_width = strlen(buf);
3903 3905 }
3904 3906 }
3905 3907
3906 3908 return (0);
3907 3909 }
3908 3910
3909 3911 int
3910 3912 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
3911 3913 char *resource, void *export, void *sharetab,
3912 3914 int sharemax, zfs_share_op_t operation)
3913 3915 {
3914 3916 zfs_cmd_t zc = { 0 };
3915 3917 int error;
3916 3918
3917 3919 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3918 3920 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
3919 3921 if (resource)
3920 3922 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
3921 3923 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
3922 3924 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
3923 3925 zc.zc_share.z_sharetype = operation;
3924 3926 zc.zc_share.z_sharemax = sharemax;
3925 3927 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
3926 3928 return (error);
3927 3929 }
3928 3930
3929 3931 void
3930 3932 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
3931 3933 {
3932 3934 nvpair_t *curr;
3933 3935
3934 3936 /*
3935 3937 * Keep a reference to the props-table against which we prune the
3936 3938 * properties.
3937 3939 */
3938 3940 zhp->zfs_props_table = props;
3939 3941
3940 3942 curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
3941 3943
3942 3944 while (curr) {
3943 3945 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
3944 3946 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
3945 3947
3946 3948 /*
3947 3949 * User properties will result in ZPROP_INVAL, and since we
3948 3950 * only know how to prune standard ZFS properties, we always
3949 3951 * leave these in the list. This can also happen if we
3950 3952 * encounter an unknown DSL property (when running older
3951 3953 * software, for example).
3952 3954 */
3953 3955 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
3954 3956 (void) nvlist_remove(zhp->zfs_props,
3955 3957 nvpair_name(curr), nvpair_type(curr));
3956 3958 curr = next;
3957 3959 }
3958 3960 }
3959 3961
3960 3962 static int
3961 3963 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
3962 3964 zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
3963 3965 {
3964 3966 zfs_cmd_t zc = { 0 };
3965 3967 nvlist_t *nvlist = NULL;
3966 3968 int error;
3967 3969
3968 3970 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3969 3971 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
3970 3972 zc.zc_cookie = (uint64_t)cmd;
3971 3973
3972 3974 if (cmd == ZFS_SMB_ACL_RENAME) {
3973 3975 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
3974 3976 (void) no_memory(hdl);
3975 3977 return (NULL);
3976 3978 }
3977 3979 }
3978 3980
3979 3981 switch (cmd) {
3980 3982 case ZFS_SMB_ACL_ADD:
3981 3983 case ZFS_SMB_ACL_REMOVE:
3982 3984 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
3983 3985 break;
3984 3986 case ZFS_SMB_ACL_RENAME:
3985 3987 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
3986 3988 resource1) != 0) {
3987 3989 (void) no_memory(hdl);
3988 3990 return (-1);
3989 3991 }
3990 3992 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
3991 3993 resource2) != 0) {
3992 3994 (void) no_memory(hdl);
3993 3995 return (-1);
3994 3996 }
3995 3997 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
3996 3998 nvlist_free(nvlist);
3997 3999 return (-1);
3998 4000 }
3999 4001 break;
4000 4002 case ZFS_SMB_ACL_PURGE:
4001 4003 break;
4002 4004 default:
4003 4005 return (-1);
4004 4006 }
4005 4007 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4006 4008 if (nvlist)
4007 4009 nvlist_free(nvlist);
4008 4010 return (error);
4009 4011 }
4010 4012
4011 4013 int
4012 4014 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4013 4015 char *path, char *resource)
4014 4016 {
4015 4017 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4016 4018 resource, NULL));
4017 4019 }
4018 4020
4019 4021 int
4020 4022 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4021 4023 char *path, char *resource)
4022 4024 {
4023 4025 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4024 4026 resource, NULL));
4025 4027 }
4026 4028
4027 4029 int
4028 4030 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4029 4031 {
4030 4032 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4031 4033 NULL, NULL));
4032 4034 }
4033 4035
4034 4036 int
4035 4037 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4036 4038 char *oldname, char *newname)
4037 4039 {
4038 4040 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4039 4041 oldname, newname));
4040 4042 }
4041 4043
4042 4044 int
4043 4045 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4044 4046 zfs_userspace_cb_t func, void *arg)
4045 4047 {
4046 4048 zfs_cmd_t zc = { 0 };
4047 4049 zfs_useracct_t buf[100];
4048 4050 libzfs_handle_t *hdl = zhp->zfs_hdl;
4049 4051 int ret;
4050 4052
4051 4053 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4052 4054
4053 4055 zc.zc_objset_type = type;
4054 4056 zc.zc_nvlist_dst = (uintptr_t)buf;
4055 4057
4056 4058 for (;;) {
4057 4059 zfs_useracct_t *zua = buf;
4058 4060
4059 4061 zc.zc_nvlist_dst_size = sizeof (buf);
4060 4062 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4061 4063 char errbuf[ZFS_MAXNAMELEN + 32];
4062 4064
4063 4065 (void) snprintf(errbuf, sizeof (errbuf),
4064 4066 dgettext(TEXT_DOMAIN,
4065 4067 "cannot get used/quota for %s"), zc.zc_name);
4066 4068 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4067 4069 }
4068 4070 if (zc.zc_nvlist_dst_size == 0)
4069 4071 break;
4070 4072
4071 4073 while (zc.zc_nvlist_dst_size > 0) {
4072 4074 if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4073 4075 zua->zu_space)) != 0)
4074 4076 return (ret);
4075 4077 zua++;
4076 4078 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4077 4079 }
4078 4080 }
4079 4081
4080 4082 return (0);
4081 4083 }
4082 4084
4083 4085 int
4084 4086 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4085 4087 boolean_t recursive, boolean_t temphold, boolean_t enoent_ok,
4086 4088 int cleanup_fd, uint64_t dsobj, uint64_t createtxg)
4087 4089 {
4088 4090 zfs_cmd_t zc = { 0 };
4089 4091 libzfs_handle_t *hdl = zhp->zfs_hdl;
4090 4092
4091 4093 ASSERT(!recursive || dsobj == 0);
4092 4094
4093 4095 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4094 4096 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
4095 4097 if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string))
4096 4098 >= sizeof (zc.zc_string))
4097 4099 return (zfs_error(hdl, EZFS_TAGTOOLONG, tag));
4098 4100 zc.zc_cookie = recursive;
4099 4101 zc.zc_temphold = temphold;
4100 4102 zc.zc_cleanup_fd = cleanup_fd;
4101 4103 zc.zc_sendobj = dsobj;
4102 4104 zc.zc_createtxg = createtxg;
4103 4105
4104 4106 if (zfs_ioctl(hdl, ZFS_IOC_HOLD, &zc) != 0) {
4105 4107 char errbuf[ZFS_MAXNAMELEN+32];
4106 4108
4107 4109 /*
4108 4110 * if it was recursive, the one that actually failed will be in
4109 4111 * zc.zc_name.
4110 4112 */
4111 4113 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4112 4114 "cannot hold '%s@%s'"), zc.zc_name, snapname);
4113 4115 switch (errno) {
4114 4116 case E2BIG:
4115 4117 /*
4116 4118 * Temporary tags wind up having the ds object id
4117 4119 * prepended. So even if we passed the length check
4118 4120 * above, it's still possible for the tag to wind
4119 4121 * up being slightly too long.
4120 4122 */
4121 4123 return (zfs_error(hdl, EZFS_TAGTOOLONG, errbuf));
4122 4124 case ENOTSUP:
4123 4125 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4124 4126 "pool must be upgraded"));
4125 4127 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
4126 4128 case EINVAL:
4127 4129 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4128 4130 case EEXIST:
4129 4131 return (zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf));
4130 4132 case ENOENT:
4131 4133 if (enoent_ok)
4132 4134 return (ENOENT);
4133 4135 /* FALLTHROUGH */
4134 4136 default:
4135 4137 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4136 4138 }
4137 4139 }
4138 4140
4139 4141 return (0);
4140 4142 }
4141 4143
4142 4144 int
4143 4145 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4144 4146 boolean_t recursive)
4145 4147 {
4146 4148 zfs_cmd_t zc = { 0 };
4147 4149 libzfs_handle_t *hdl = zhp->zfs_hdl;
4148 4150
4149 4151 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4150 4152 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
4151 4153 if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string))
4152 4154 >= sizeof (zc.zc_string))
4153 4155 return (zfs_error(hdl, EZFS_TAGTOOLONG, tag));
4154 4156 zc.zc_cookie = recursive;
4155 4157
4156 4158 if (zfs_ioctl(hdl, ZFS_IOC_RELEASE, &zc) != 0) {
4157 4159 char errbuf[ZFS_MAXNAMELEN+32];
4158 4160
4159 4161 /*
4160 4162 * if it was recursive, the one that actually failed will be in
4161 4163 * zc.zc_name.
4162 4164 */
4163 4165 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4164 4166 "cannot release '%s' from '%s@%s'"), tag, zc.zc_name,
4165 4167 snapname);
4166 4168 switch (errno) {
4167 4169 case ESRCH:
4168 4170 return (zfs_error(hdl, EZFS_REFTAG_RELE, errbuf));
4169 4171 case ENOTSUP:
4170 4172 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4171 4173 "pool must be upgraded"));
4172 4174 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
4173 4175 case EINVAL:
4174 4176 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4175 4177 default:
4176 4178 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4177 4179 }
4178 4180 }
4179 4181
4180 4182 return (0);
4181 4183 }
4182 4184
4183 4185 int
4184 4186 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4185 4187 {
4186 4188 zfs_cmd_t zc = { 0 };
4187 4189 libzfs_handle_t *hdl = zhp->zfs_hdl;
4188 4190 int nvsz = 2048;
4189 4191 void *nvbuf;
4190 4192 int err = 0;
4191 4193 char errbuf[ZFS_MAXNAMELEN+32];
4192 4194
4193 4195 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4194 4196 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4195 4197
4196 4198 tryagain:
4197 4199
4198 4200 nvbuf = malloc(nvsz);
4199 4201 if (nvbuf == NULL) {
4200 4202 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4201 4203 goto out;
4202 4204 }
4203 4205
4204 4206 zc.zc_nvlist_dst_size = nvsz;
4205 4207 zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4206 4208
4207 4209 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4208 4210
4209 4211 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4210 4212 (void) snprintf(errbuf, sizeof (errbuf),
4211 4213 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4212 4214 zc.zc_name);
4213 4215 switch (errno) {
4214 4216 case ENOMEM:
4215 4217 free(nvbuf);
4216 4218 nvsz = zc.zc_nvlist_dst_size;
4217 4219 goto tryagain;
4218 4220
4219 4221 case ENOTSUP:
4220 4222 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4221 4223 "pool must be upgraded"));
4222 4224 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4223 4225 break;
4224 4226 case EINVAL:
4225 4227 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4226 4228 break;
4227 4229 case ENOENT:
4228 4230 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4229 4231 break;
4230 4232 default:
4231 4233 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4232 4234 break;
4233 4235 }
4234 4236 } else {
4235 4237 /* success */
4236 4238 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4237 4239 if (rc) {
4238 4240 (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4239 4241 TEXT_DOMAIN, "cannot get permissions on '%s'"),
4240 4242 zc.zc_name);
4241 4243 err = zfs_standard_error_fmt(hdl, rc, errbuf);
4242 4244 }
4243 4245 }
4244 4246
4245 4247 free(nvbuf);
4246 4248 out:
4247 4249 return (err);
4248 4250 }
4249 4251
4250 4252 int
4251 4253 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4252 4254 {
4253 4255 zfs_cmd_t zc = { 0 };
4254 4256 libzfs_handle_t *hdl = zhp->zfs_hdl;
4255 4257 char *nvbuf;
4256 4258 char errbuf[ZFS_MAXNAMELEN+32];
4257 4259 size_t nvsz;
4258 4260 int err;
4259 4261
4260 4262 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4261 4263 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4262 4264
4263 4265 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4264 4266 assert(err == 0);
4265 4267
4266 4268 nvbuf = malloc(nvsz);
4267 4269
4268 4270 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4269 4271 assert(err == 0);
4270 4272
4271 4273 zc.zc_nvlist_src_size = nvsz;
4272 4274 zc.zc_nvlist_src = (uintptr_t)nvbuf;
4273 4275 zc.zc_perm_action = un;
4274 4276
4275 4277 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4276 4278
4277 4279 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4278 4280 (void) snprintf(errbuf, sizeof (errbuf),
4279 4281 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4280 4282 zc.zc_name);
4281 4283 switch (errno) {
4282 4284 case ENOTSUP:
4283 4285 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4284 4286 "pool must be upgraded"));
4285 4287 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4286 4288 break;
4287 4289 case EINVAL:
4288 4290 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4289 4291 break;
4290 4292 case ENOENT:
4291 4293 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4292 4294 break;
4293 4295 default:
4294 4296 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4295 4297 break;
4296 4298 }
4297 4299 }
4298 4300
4299 4301 free(nvbuf);
4300 4302
4301 4303 return (err);
4302 4304 }
4303 4305
4304 4306 int
4305 4307 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4306 4308 {
4307 4309 zfs_cmd_t zc = { 0 };
4308 4310 libzfs_handle_t *hdl = zhp->zfs_hdl;
4309 4311 int nvsz = 2048;
4310 4312 void *nvbuf;
4311 4313 int err = 0;
4312 4314 char errbuf[ZFS_MAXNAMELEN+32];
4313 4315
4314 4316 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
4315 4317
4316 4318 tryagain:
4317 4319
4318 4320 nvbuf = malloc(nvsz);
4319 4321 if (nvbuf == NULL) {
4320 4322 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4321 4323 goto out;
4322 4324 }
4323 4325
4324 4326 zc.zc_nvlist_dst_size = nvsz;
4325 4327 zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4326 4328
4327 4329 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4328 4330
4329 4331 if (zfs_ioctl(hdl, ZFS_IOC_GET_HOLDS, &zc) != 0) {
4330 4332 (void) snprintf(errbuf, sizeof (errbuf),
4331 4333 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4332 4334 zc.zc_name);
4333 4335 switch (errno) {
4334 4336 case ENOMEM:
4335 4337 free(nvbuf);
4336 4338 nvsz = zc.zc_nvlist_dst_size;
4337 4339 goto tryagain;
4338 4340
4339 4341 case ENOTSUP:
4340 4342 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4341 4343 "pool must be upgraded"));
4342 4344 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4343 4345 break;
4344 4346 case EINVAL:
4345 4347 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4346 4348 break;
4347 4349 case ENOENT:
4348 4350 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4349 4351 break;
4350 4352 default:
4351 4353 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4352 4354 break;
4353 4355 }
4354 4356 } else {
4355 4357 /* success */
4356 4358 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4357 4359 if (rc) {
4358 4360 (void) snprintf(errbuf, sizeof (errbuf),
4359 4361 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4360 4362 zc.zc_name);
4361 4363 err = zfs_standard_error_fmt(hdl, rc, errbuf);
4362 4364 }
4363 4365 }
4364 4366
4365 4367 free(nvbuf);
4366 4368 out:
4367 4369 return (err);
4368 4370 }
4369 4371
4370 4372 uint64_t
4371 4373 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4372 4374 {
4373 4375 uint64_t numdb;
4374 4376 uint64_t nblocks, volblocksize;
4375 4377 int ncopies;
4376 4378 char *strval;
4377 4379
4378 4380 if (nvlist_lookup_string(props,
4379 4381 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4380 4382 ncopies = atoi(strval);
4381 4383 else
4382 4384 ncopies = 1;
4383 4385 if (nvlist_lookup_uint64(props,
4384 4386 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4385 4387 &volblocksize) != 0)
4386 4388 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4387 4389 nblocks = volsize/volblocksize;
4388 4390 /* start with metadnode L0-L6 */
4389 4391 numdb = 7;
4390 4392 /* calculate number of indirects */
4391 4393 while (nblocks > 1) {
4392 4394 nblocks += DNODES_PER_LEVEL - 1;
4393 4395 nblocks /= DNODES_PER_LEVEL;
4394 4396 numdb += nblocks;
4395 4397 }
4396 4398 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4397 4399 volsize *= ncopies;
4398 4400 /*
4399 4401 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4400 4402 * compressed, but in practice they compress down to about
4401 4403 * 1100 bytes
4402 4404 */
4403 4405 numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4404 4406 volsize += numdb;
4405 4407 return (volsize);
4406 4408 }
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