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4185 New hash algorithm support
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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) 2013 by Delphix. All rights reserved.
25 25 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved.
26 26 * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
27 27 * Copyright (c) 2013 Martin Matuska. All rights reserved.
28 28 * Copyright (c) 2013 Steven Hartland. All rights reserved.
29 29 */
30 30
31 31 #include <ctype.h>
32 32 #include <errno.h>
33 33 #include <libintl.h>
34 34 #include <math.h>
35 35 #include <stdio.h>
36 36 #include <stdlib.h>
37 37 #include <strings.h>
38 38 #include <unistd.h>
39 39 #include <stddef.h>
40 40 #include <zone.h>
41 41 #include <fcntl.h>
42 42 #include <sys/mntent.h>
43 43 #include <sys/mount.h>
44 44 #include <priv.h>
45 45 #include <pwd.h>
46 46 #include <grp.h>
47 47 #include <stddef.h>
48 48 #include <ucred.h>
49 49 #include <idmap.h>
50 50 #include <aclutils.h>
51 51 #include <directory.h>
52 52
53 53 #include <sys/dnode.h>
54 54 #include <sys/spa.h>
55 55 #include <sys/zap.h>
56 56 #include <libzfs.h>
57 57
58 58 #include "zfs_namecheck.h"
59 59 #include "zfs_prop.h"
60 60 #include "libzfs_impl.h"
61 61 #include "zfs_deleg.h"
62 62
63 63 static int userquota_propname_decode(const char *propname, boolean_t zoned,
64 64 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
65 65
66 66 /*
67 67 * Given a single type (not a mask of types), return the type in a human
68 68 * readable form.
69 69 */
70 70 const char *
71 71 zfs_type_to_name(zfs_type_t type)
72 72 {
73 73 switch (type) {
74 74 case ZFS_TYPE_FILESYSTEM:
75 75 return (dgettext(TEXT_DOMAIN, "filesystem"));
76 76 case ZFS_TYPE_SNAPSHOT:
77 77 return (dgettext(TEXT_DOMAIN, "snapshot"));
78 78 case ZFS_TYPE_VOLUME:
79 79 return (dgettext(TEXT_DOMAIN, "volume"));
80 80 }
81 81
82 82 return (NULL);
83 83 }
84 84
85 85 /*
86 86 * Given a path and mask of ZFS types, return a string describing this dataset.
87 87 * This is used when we fail to open a dataset and we cannot get an exact type.
88 88 * We guess what the type would have been based on the path and the mask of
89 89 * acceptable types.
90 90 */
91 91 static const char *
92 92 path_to_str(const char *path, int types)
93 93 {
94 94 /*
95 95 * When given a single type, always report the exact type.
96 96 */
97 97 if (types == ZFS_TYPE_SNAPSHOT)
98 98 return (dgettext(TEXT_DOMAIN, "snapshot"));
99 99 if (types == ZFS_TYPE_FILESYSTEM)
100 100 return (dgettext(TEXT_DOMAIN, "filesystem"));
101 101 if (types == ZFS_TYPE_VOLUME)
102 102 return (dgettext(TEXT_DOMAIN, "volume"));
103 103
104 104 /*
105 105 * The user is requesting more than one type of dataset. If this is the
106 106 * case, consult the path itself. If we're looking for a snapshot, and
107 107 * a '@' is found, then report it as "snapshot". Otherwise, remove the
108 108 * snapshot attribute and try again.
109 109 */
110 110 if (types & ZFS_TYPE_SNAPSHOT) {
111 111 if (strchr(path, '@') != NULL)
112 112 return (dgettext(TEXT_DOMAIN, "snapshot"));
113 113 return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT));
114 114 }
115 115
116 116 /*
117 117 * The user has requested either filesystems or volumes.
118 118 * We have no way of knowing a priori what type this would be, so always
119 119 * report it as "filesystem" or "volume", our two primitive types.
120 120 */
121 121 if (types & ZFS_TYPE_FILESYSTEM)
122 122 return (dgettext(TEXT_DOMAIN, "filesystem"));
123 123
124 124 assert(types & ZFS_TYPE_VOLUME);
125 125 return (dgettext(TEXT_DOMAIN, "volume"));
126 126 }
127 127
128 128 /*
129 129 * Validate a ZFS path. This is used even before trying to open the dataset, to
130 130 * provide a more meaningful error message. We call zfs_error_aux() to
131 131 * explain exactly why the name was not valid.
132 132 */
133 133 int
134 134 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
135 135 boolean_t modifying)
136 136 {
137 137 namecheck_err_t why;
138 138 char what;
139 139
140 140 (void) zfs_prop_get_table();
141 141 if (dataset_namecheck(path, &why, &what) != 0) {
142 142 if (hdl != NULL) {
143 143 switch (why) {
144 144 case NAME_ERR_TOOLONG:
145 145 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
146 146 "name is too long"));
147 147 break;
148 148
149 149 case NAME_ERR_LEADING_SLASH:
150 150 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
151 151 "leading slash in name"));
152 152 break;
153 153
154 154 case NAME_ERR_EMPTY_COMPONENT:
155 155 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
156 156 "empty component in name"));
157 157 break;
158 158
159 159 case NAME_ERR_TRAILING_SLASH:
160 160 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
161 161 "trailing slash in name"));
162 162 break;
163 163
164 164 case NAME_ERR_INVALCHAR:
165 165 zfs_error_aux(hdl,
166 166 dgettext(TEXT_DOMAIN, "invalid character "
167 167 "'%c' in name"), what);
168 168 break;
169 169
170 170 case NAME_ERR_MULTIPLE_AT:
171 171 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
172 172 "multiple '@' delimiters in name"));
173 173 break;
174 174
175 175 case NAME_ERR_NOLETTER:
176 176 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
177 177 "pool doesn't begin with a letter"));
178 178 break;
179 179
180 180 case NAME_ERR_RESERVED:
181 181 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
182 182 "name is reserved"));
183 183 break;
184 184
185 185 case NAME_ERR_DISKLIKE:
186 186 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
187 187 "reserved disk name"));
188 188 break;
189 189 }
190 190 }
191 191
192 192 return (0);
193 193 }
194 194
195 195 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
196 196 if (hdl != NULL)
197 197 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
198 198 "snapshot delimiter '@' in filesystem name"));
199 199 return (0);
200 200 }
201 201
202 202 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
203 203 if (hdl != NULL)
204 204 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
205 205 "missing '@' delimiter in snapshot name"));
206 206 return (0);
207 207 }
208 208
209 209 if (modifying && strchr(path, '%') != NULL) {
210 210 if (hdl != NULL)
211 211 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
212 212 "invalid character %c in name"), '%');
213 213 return (0);
214 214 }
215 215
216 216 return (-1);
217 217 }
218 218
219 219 int
220 220 zfs_name_valid(const char *name, zfs_type_t type)
221 221 {
222 222 if (type == ZFS_TYPE_POOL)
223 223 return (zpool_name_valid(NULL, B_FALSE, name));
224 224 return (zfs_validate_name(NULL, name, type, B_FALSE));
225 225 }
226 226
227 227 /*
228 228 * This function takes the raw DSL properties, and filters out the user-defined
229 229 * properties into a separate nvlist.
230 230 */
231 231 static nvlist_t *
232 232 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
233 233 {
234 234 libzfs_handle_t *hdl = zhp->zfs_hdl;
235 235 nvpair_t *elem;
236 236 nvlist_t *propval;
237 237 nvlist_t *nvl;
238 238
239 239 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
240 240 (void) no_memory(hdl);
241 241 return (NULL);
242 242 }
243 243
244 244 elem = NULL;
245 245 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
246 246 if (!zfs_prop_user(nvpair_name(elem)))
247 247 continue;
248 248
249 249 verify(nvpair_value_nvlist(elem, &propval) == 0);
250 250 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
251 251 nvlist_free(nvl);
252 252 (void) no_memory(hdl);
253 253 return (NULL);
254 254 }
255 255 }
256 256
257 257 return (nvl);
258 258 }
259 259
260 260 static zpool_handle_t *
261 261 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
262 262 {
263 263 libzfs_handle_t *hdl = zhp->zfs_hdl;
264 264 zpool_handle_t *zph;
265 265
266 266 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
267 267 if (hdl->libzfs_pool_handles != NULL)
268 268 zph->zpool_next = hdl->libzfs_pool_handles;
269 269 hdl->libzfs_pool_handles = zph;
270 270 }
271 271 return (zph);
272 272 }
273 273
274 274 static zpool_handle_t *
275 275 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
276 276 {
277 277 libzfs_handle_t *hdl = zhp->zfs_hdl;
278 278 zpool_handle_t *zph = hdl->libzfs_pool_handles;
279 279
280 280 while ((zph != NULL) &&
281 281 (strncmp(pool_name, zpool_get_name(zph), len) != 0))
282 282 zph = zph->zpool_next;
283 283 return (zph);
284 284 }
285 285
286 286 /*
287 287 * Returns a handle to the pool that contains the provided dataset.
288 288 * If a handle to that pool already exists then that handle is returned.
289 289 * Otherwise, a new handle is created and added to the list of handles.
290 290 */
291 291 static zpool_handle_t *
292 292 zpool_handle(zfs_handle_t *zhp)
293 293 {
294 294 char *pool_name;
295 295 int len;
296 296 zpool_handle_t *zph;
297 297
298 298 len = strcspn(zhp->zfs_name, "/@") + 1;
299 299 pool_name = zfs_alloc(zhp->zfs_hdl, len);
300 300 (void) strlcpy(pool_name, zhp->zfs_name, len);
301 301
302 302 zph = zpool_find_handle(zhp, pool_name, len);
303 303 if (zph == NULL)
304 304 zph = zpool_add_handle(zhp, pool_name);
305 305
306 306 free(pool_name);
307 307 return (zph);
308 308 }
309 309
310 310 void
311 311 zpool_free_handles(libzfs_handle_t *hdl)
312 312 {
313 313 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
314 314
315 315 while (zph != NULL) {
316 316 next = zph->zpool_next;
317 317 zpool_close(zph);
318 318 zph = next;
319 319 }
320 320 hdl->libzfs_pool_handles = NULL;
321 321 }
322 322
323 323 /*
324 324 * Utility function to gather stats (objset and zpl) for the given object.
325 325 */
326 326 static int
327 327 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
328 328 {
329 329 libzfs_handle_t *hdl = zhp->zfs_hdl;
330 330
331 331 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
332 332
333 333 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
334 334 if (errno == ENOMEM) {
335 335 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
336 336 return (-1);
337 337 }
338 338 } else {
339 339 return (-1);
340 340 }
341 341 }
342 342 return (0);
343 343 }
344 344
345 345 /*
346 346 * Utility function to get the received properties of the given object.
347 347 */
348 348 static int
349 349 get_recvd_props_ioctl(zfs_handle_t *zhp)
350 350 {
351 351 libzfs_handle_t *hdl = zhp->zfs_hdl;
352 352 nvlist_t *recvdprops;
353 353 zfs_cmd_t zc = { 0 };
354 354 int err;
355 355
356 356 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
357 357 return (-1);
358 358
359 359 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
360 360
361 361 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
362 362 if (errno == ENOMEM) {
363 363 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
364 364 return (-1);
365 365 }
366 366 } else {
367 367 zcmd_free_nvlists(&zc);
368 368 return (-1);
369 369 }
370 370 }
371 371
372 372 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
373 373 zcmd_free_nvlists(&zc);
374 374 if (err != 0)
375 375 return (-1);
376 376
377 377 nvlist_free(zhp->zfs_recvd_props);
378 378 zhp->zfs_recvd_props = recvdprops;
379 379
380 380 return (0);
381 381 }
382 382
383 383 static int
384 384 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
385 385 {
386 386 nvlist_t *allprops, *userprops;
387 387
388 388 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
389 389
390 390 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
391 391 return (-1);
392 392 }
393 393
394 394 /*
395 395 * XXX Why do we store the user props separately, in addition to
396 396 * storing them in zfs_props?
397 397 */
398 398 if ((userprops = process_user_props(zhp, allprops)) == NULL) {
399 399 nvlist_free(allprops);
400 400 return (-1);
401 401 }
402 402
403 403 nvlist_free(zhp->zfs_props);
404 404 nvlist_free(zhp->zfs_user_props);
405 405
406 406 zhp->zfs_props = allprops;
407 407 zhp->zfs_user_props = userprops;
408 408
409 409 return (0);
410 410 }
411 411
412 412 static int
413 413 get_stats(zfs_handle_t *zhp)
414 414 {
415 415 int rc = 0;
416 416 zfs_cmd_t zc = { 0 };
417 417
418 418 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
419 419 return (-1);
420 420 if (get_stats_ioctl(zhp, &zc) != 0)
421 421 rc = -1;
422 422 else if (put_stats_zhdl(zhp, &zc) != 0)
423 423 rc = -1;
424 424 zcmd_free_nvlists(&zc);
425 425 return (rc);
426 426 }
427 427
428 428 /*
429 429 * Refresh the properties currently stored in the handle.
430 430 */
431 431 void
432 432 zfs_refresh_properties(zfs_handle_t *zhp)
433 433 {
434 434 (void) get_stats(zhp);
435 435 }
436 436
437 437 /*
438 438 * Makes a handle from the given dataset name. Used by zfs_open() and
439 439 * zfs_iter_* to create child handles on the fly.
440 440 */
441 441 static int
442 442 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
443 443 {
444 444 if (put_stats_zhdl(zhp, zc) != 0)
445 445 return (-1);
446 446
447 447 /*
448 448 * We've managed to open the dataset and gather statistics. Determine
449 449 * the high-level type.
450 450 */
451 451 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
452 452 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
453 453 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
454 454 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
455 455 else
456 456 abort();
457 457
458 458 if (zhp->zfs_dmustats.dds_is_snapshot)
459 459 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
460 460 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
461 461 zhp->zfs_type = ZFS_TYPE_VOLUME;
462 462 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
463 463 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
464 464 else
465 465 abort(); /* we should never see any other types */
466 466
467 467 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
468 468 return (-1);
469 469
470 470 return (0);
471 471 }
472 472
473 473 zfs_handle_t *
474 474 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
475 475 {
476 476 zfs_cmd_t zc = { 0 };
477 477
478 478 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
479 479
480 480 if (zhp == NULL)
481 481 return (NULL);
482 482
483 483 zhp->zfs_hdl = hdl;
484 484 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
485 485 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
486 486 free(zhp);
487 487 return (NULL);
488 488 }
489 489 if (get_stats_ioctl(zhp, &zc) == -1) {
490 490 zcmd_free_nvlists(&zc);
491 491 free(zhp);
492 492 return (NULL);
493 493 }
494 494 if (make_dataset_handle_common(zhp, &zc) == -1) {
495 495 free(zhp);
496 496 zhp = NULL;
497 497 }
498 498 zcmd_free_nvlists(&zc);
499 499 return (zhp);
500 500 }
501 501
502 502 zfs_handle_t *
503 503 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
504 504 {
505 505 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
506 506
507 507 if (zhp == NULL)
508 508 return (NULL);
509 509
510 510 zhp->zfs_hdl = hdl;
511 511 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
512 512 if (make_dataset_handle_common(zhp, zc) == -1) {
513 513 free(zhp);
514 514 return (NULL);
515 515 }
516 516 return (zhp);
517 517 }
518 518
519 519 zfs_handle_t *
520 520 zfs_handle_dup(zfs_handle_t *zhp_orig)
521 521 {
522 522 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
523 523
524 524 if (zhp == NULL)
525 525 return (NULL);
526 526
527 527 zhp->zfs_hdl = zhp_orig->zfs_hdl;
528 528 zhp->zpool_hdl = zhp_orig->zpool_hdl;
529 529 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
530 530 sizeof (zhp->zfs_name));
531 531 zhp->zfs_type = zhp_orig->zfs_type;
532 532 zhp->zfs_head_type = zhp_orig->zfs_head_type;
533 533 zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
534 534 if (zhp_orig->zfs_props != NULL) {
535 535 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
536 536 (void) no_memory(zhp->zfs_hdl);
537 537 zfs_close(zhp);
538 538 return (NULL);
539 539 }
540 540 }
541 541 if (zhp_orig->zfs_user_props != NULL) {
542 542 if (nvlist_dup(zhp_orig->zfs_user_props,
543 543 &zhp->zfs_user_props, 0) != 0) {
544 544 (void) no_memory(zhp->zfs_hdl);
545 545 zfs_close(zhp);
546 546 return (NULL);
547 547 }
548 548 }
549 549 if (zhp_orig->zfs_recvd_props != NULL) {
550 550 if (nvlist_dup(zhp_orig->zfs_recvd_props,
551 551 &zhp->zfs_recvd_props, 0)) {
552 552 (void) no_memory(zhp->zfs_hdl);
553 553 zfs_close(zhp);
554 554 return (NULL);
555 555 }
556 556 }
557 557 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
558 558 if (zhp_orig->zfs_mntopts != NULL) {
559 559 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
560 560 zhp_orig->zfs_mntopts);
561 561 }
562 562 zhp->zfs_props_table = zhp_orig->zfs_props_table;
563 563 return (zhp);
564 564 }
565 565
566 566 /*
567 567 * Opens the given snapshot, filesystem, or volume. The 'types'
568 568 * argument is a mask of acceptable types. The function will print an
569 569 * appropriate error message and return NULL if it can't be opened.
570 570 */
571 571 zfs_handle_t *
572 572 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
573 573 {
574 574 zfs_handle_t *zhp;
575 575 char errbuf[1024];
576 576
577 577 (void) snprintf(errbuf, sizeof (errbuf),
578 578 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
579 579
580 580 /*
581 581 * Validate the name before we even try to open it.
582 582 */
583 583 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
584 584 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
585 585 "invalid dataset name"));
586 586 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
587 587 return (NULL);
588 588 }
589 589
590 590 /*
591 591 * Try to get stats for the dataset, which will tell us if it exists.
592 592 */
593 593 errno = 0;
594 594 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
595 595 (void) zfs_standard_error(hdl, errno, errbuf);
596 596 return (NULL);
597 597 }
598 598
599 599 if (!(types & zhp->zfs_type)) {
600 600 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
601 601 zfs_close(zhp);
602 602 return (NULL);
603 603 }
604 604
605 605 return (zhp);
606 606 }
607 607
608 608 /*
609 609 * Release a ZFS handle. Nothing to do but free the associated memory.
610 610 */
611 611 void
612 612 zfs_close(zfs_handle_t *zhp)
613 613 {
614 614 if (zhp->zfs_mntopts)
615 615 free(zhp->zfs_mntopts);
616 616 nvlist_free(zhp->zfs_props);
617 617 nvlist_free(zhp->zfs_user_props);
618 618 nvlist_free(zhp->zfs_recvd_props);
619 619 free(zhp);
620 620 }
621 621
622 622 typedef struct mnttab_node {
623 623 struct mnttab mtn_mt;
624 624 avl_node_t mtn_node;
625 625 } mnttab_node_t;
626 626
627 627 static int
628 628 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
629 629 {
630 630 const mnttab_node_t *mtn1 = arg1;
631 631 const mnttab_node_t *mtn2 = arg2;
632 632 int rv;
633 633
634 634 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
635 635
636 636 if (rv == 0)
637 637 return (0);
638 638 return (rv > 0 ? 1 : -1);
639 639 }
640 640
641 641 void
642 642 libzfs_mnttab_init(libzfs_handle_t *hdl)
643 643 {
644 644 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
645 645 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
646 646 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
647 647 }
648 648
649 649 void
650 650 libzfs_mnttab_update(libzfs_handle_t *hdl)
651 651 {
652 652 struct mnttab entry;
653 653
654 654 rewind(hdl->libzfs_mnttab);
655 655 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
656 656 mnttab_node_t *mtn;
657 657
658 658 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
659 659 continue;
660 660 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
661 661 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
662 662 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
663 663 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
664 664 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
665 665 avl_add(&hdl->libzfs_mnttab_cache, mtn);
666 666 }
667 667 }
668 668
669 669 void
670 670 libzfs_mnttab_fini(libzfs_handle_t *hdl)
671 671 {
672 672 void *cookie = NULL;
673 673 mnttab_node_t *mtn;
674 674
675 675 while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) {
676 676 free(mtn->mtn_mt.mnt_special);
677 677 free(mtn->mtn_mt.mnt_mountp);
678 678 free(mtn->mtn_mt.mnt_fstype);
679 679 free(mtn->mtn_mt.mnt_mntopts);
680 680 free(mtn);
681 681 }
682 682 avl_destroy(&hdl->libzfs_mnttab_cache);
683 683 }
684 684
685 685 void
686 686 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
687 687 {
688 688 hdl->libzfs_mnttab_enable = enable;
689 689 }
690 690
691 691 int
692 692 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
693 693 struct mnttab *entry)
694 694 {
695 695 mnttab_node_t find;
696 696 mnttab_node_t *mtn;
697 697
698 698 if (!hdl->libzfs_mnttab_enable) {
699 699 struct mnttab srch = { 0 };
700 700
701 701 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
702 702 libzfs_mnttab_fini(hdl);
703 703 rewind(hdl->libzfs_mnttab);
704 704 srch.mnt_special = (char *)fsname;
705 705 srch.mnt_fstype = MNTTYPE_ZFS;
706 706 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
707 707 return (0);
708 708 else
709 709 return (ENOENT);
710 710 }
711 711
712 712 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
713 713 libzfs_mnttab_update(hdl);
714 714
715 715 find.mtn_mt.mnt_special = (char *)fsname;
716 716 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
717 717 if (mtn) {
718 718 *entry = mtn->mtn_mt;
719 719 return (0);
720 720 }
721 721 return (ENOENT);
722 722 }
723 723
724 724 void
725 725 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
726 726 const char *mountp, const char *mntopts)
727 727 {
728 728 mnttab_node_t *mtn;
729 729
730 730 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
731 731 return;
732 732 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
733 733 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
734 734 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
735 735 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
736 736 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
737 737 avl_add(&hdl->libzfs_mnttab_cache, mtn);
738 738 }
739 739
740 740 void
741 741 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
742 742 {
743 743 mnttab_node_t find;
744 744 mnttab_node_t *ret;
745 745
746 746 find.mtn_mt.mnt_special = (char *)fsname;
747 747 if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) {
748 748 avl_remove(&hdl->libzfs_mnttab_cache, ret);
749 749 free(ret->mtn_mt.mnt_special);
750 750 free(ret->mtn_mt.mnt_mountp);
751 751 free(ret->mtn_mt.mnt_fstype);
752 752 free(ret->mtn_mt.mnt_mntopts);
753 753 free(ret);
754 754 }
755 755 }
756 756
757 757 int
758 758 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
759 759 {
760 760 zpool_handle_t *zpool_handle = zhp->zpool_hdl;
761 761
762 762 if (zpool_handle == NULL)
763 763 return (-1);
764 764
765 765 *spa_version = zpool_get_prop_int(zpool_handle,
766 766 ZPOOL_PROP_VERSION, NULL);
767 767 return (0);
768 768 }
769 769
770 770 /*
771 771 * The choice of reservation property depends on the SPA version.
772 772 */
773 773 static int
774 774 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
775 775 {
776 776 int spa_version;
777 777
778 778 if (zfs_spa_version(zhp, &spa_version) < 0)
779 779 return (-1);
780 780
781 781 if (spa_version >= SPA_VERSION_REFRESERVATION)
782 782 *resv_prop = ZFS_PROP_REFRESERVATION;
783 783 else
784 784 *resv_prop = ZFS_PROP_RESERVATION;
785 785
786 786 return (0);
787 787 }
788 788
789 789 /*
790 790 * Given an nvlist of properties to set, validates that they are correct, and
791 791 * parses any numeric properties (index, boolean, etc) if they are specified as
792 792 * strings.
793 793 */
794 794 nvlist_t *
795 795 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
796 796 uint64_t zoned, zfs_handle_t *zhp, const char *errbuf)
797 797 {
798 798 nvpair_t *elem;
799 799 uint64_t intval;
800 800 char *strval;
801 801 zfs_prop_t prop;
802 802 nvlist_t *ret;
803 803 int chosen_normal = -1;
804 804 int chosen_utf = -1;
805 805
806 806 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
807 807 (void) no_memory(hdl);
808 808 return (NULL);
809 809 }
810 810
811 811 /*
812 812 * Make sure this property is valid and applies to this type.
813 813 */
814 814
815 815 elem = NULL;
816 816 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
817 817 const char *propname = nvpair_name(elem);
818 818
819 819 prop = zfs_name_to_prop(propname);
820 820 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
821 821 /*
822 822 * This is a user property: make sure it's a
823 823 * string, and that it's less than ZAP_MAXNAMELEN.
824 824 */
825 825 if (nvpair_type(elem) != DATA_TYPE_STRING) {
826 826 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
827 827 "'%s' must be a string"), propname);
828 828 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
829 829 goto error;
830 830 }
831 831
832 832 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
833 833 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
834 834 "property name '%s' is too long"),
835 835 propname);
836 836 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
837 837 goto error;
838 838 }
839 839
840 840 (void) nvpair_value_string(elem, &strval);
841 841 if (nvlist_add_string(ret, propname, strval) != 0) {
842 842 (void) no_memory(hdl);
843 843 goto error;
844 844 }
845 845 continue;
846 846 }
847 847
848 848 /*
849 849 * Currently, only user properties can be modified on
850 850 * snapshots.
851 851 */
852 852 if (type == ZFS_TYPE_SNAPSHOT) {
853 853 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
854 854 "this property can not be modified for snapshots"));
855 855 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
856 856 goto error;
857 857 }
858 858
859 859 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
860 860 zfs_userquota_prop_t uqtype;
861 861 char newpropname[128];
862 862 char domain[128];
863 863 uint64_t rid;
864 864 uint64_t valary[3];
865 865
866 866 if (userquota_propname_decode(propname, zoned,
867 867 &uqtype, domain, sizeof (domain), &rid) != 0) {
868 868 zfs_error_aux(hdl,
869 869 dgettext(TEXT_DOMAIN,
870 870 "'%s' has an invalid user/group name"),
871 871 propname);
872 872 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
873 873 goto error;
874 874 }
875 875
876 876 if (uqtype != ZFS_PROP_USERQUOTA &&
877 877 uqtype != ZFS_PROP_GROUPQUOTA) {
878 878 zfs_error_aux(hdl,
879 879 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
880 880 propname);
881 881 (void) zfs_error(hdl, EZFS_PROPREADONLY,
882 882 errbuf);
883 883 goto error;
884 884 }
885 885
886 886 if (nvpair_type(elem) == DATA_TYPE_STRING) {
887 887 (void) nvpair_value_string(elem, &strval);
888 888 if (strcmp(strval, "none") == 0) {
889 889 intval = 0;
890 890 } else if (zfs_nicestrtonum(hdl,
891 891 strval, &intval) != 0) {
892 892 (void) zfs_error(hdl,
893 893 EZFS_BADPROP, errbuf);
894 894 goto error;
895 895 }
896 896 } else if (nvpair_type(elem) ==
897 897 DATA_TYPE_UINT64) {
898 898 (void) nvpair_value_uint64(elem, &intval);
899 899 if (intval == 0) {
900 900 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
901 901 "use 'none' to disable "
902 902 "userquota/groupquota"));
903 903 goto error;
904 904 }
905 905 } else {
906 906 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
907 907 "'%s' must be a number"), propname);
908 908 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
909 909 goto error;
910 910 }
911 911
912 912 /*
913 913 * Encode the prop name as
914 914 * userquota@<hex-rid>-domain, to make it easy
915 915 * for the kernel to decode.
916 916 */
917 917 (void) snprintf(newpropname, sizeof (newpropname),
918 918 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
919 919 (longlong_t)rid, domain);
920 920 valary[0] = uqtype;
921 921 valary[1] = rid;
922 922 valary[2] = intval;
923 923 if (nvlist_add_uint64_array(ret, newpropname,
924 924 valary, 3) != 0) {
925 925 (void) no_memory(hdl);
926 926 goto error;
927 927 }
928 928 continue;
929 929 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
930 930 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
931 931 "'%s' is readonly"),
932 932 propname);
933 933 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
934 934 goto error;
935 935 }
936 936
937 937 if (prop == ZPROP_INVAL) {
938 938 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
939 939 "invalid property '%s'"), propname);
940 940 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
941 941 goto error;
942 942 }
943 943
944 944 if (!zfs_prop_valid_for_type(prop, type)) {
945 945 zfs_error_aux(hdl,
946 946 dgettext(TEXT_DOMAIN, "'%s' does not "
947 947 "apply to datasets of this type"), propname);
948 948 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
949 949 goto error;
950 950 }
951 951
952 952 if (zfs_prop_readonly(prop) &&
953 953 (!zfs_prop_setonce(prop) || zhp != NULL)) {
954 954 zfs_error_aux(hdl,
955 955 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
956 956 propname);
957 957 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
958 958 goto error;
959 959 }
960 960
961 961 if (zprop_parse_value(hdl, elem, prop, type, ret,
962 962 &strval, &intval, errbuf) != 0)
963 963 goto error;
964 964
965 965 /*
966 966 * Perform some additional checks for specific properties.
967 967 */
968 968 switch (prop) {
969 969 case ZFS_PROP_VERSION:
970 970 {
971 971 int version;
972 972
973 973 if (zhp == NULL)
974 974 break;
975 975 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
976 976 if (intval < version) {
977 977 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
978 978 "Can not downgrade; already at version %u"),
979 979 version);
980 980 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
981 981 goto error;
982 982 }
983 983 break;
984 984 }
985 985
986 986 case ZFS_PROP_RECORDSIZE:
987 987 case ZFS_PROP_VOLBLOCKSIZE:
988 988 /* must be power of two within SPA_{MIN,MAX}BLOCKSIZE */
989 989 if (intval < SPA_MINBLOCKSIZE ||
990 990 intval > SPA_MAXBLOCKSIZE || !ISP2(intval)) {
991 991 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
992 992 "'%s' must be power of 2 from %u "
993 993 "to %uk"), propname,
994 994 (uint_t)SPA_MINBLOCKSIZE,
995 995 (uint_t)SPA_MAXBLOCKSIZE >> 10);
996 996 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
997 997 goto error;
998 998 }
999 999 break;
1000 1000
1001 1001 case ZFS_PROP_MLSLABEL:
1002 1002 {
1003 1003 /*
1004 1004 * Verify the mlslabel string and convert to
1005 1005 * internal hex label string.
1006 1006 */
1007 1007
1008 1008 m_label_t *new_sl;
1009 1009 char *hex = NULL; /* internal label string */
1010 1010
1011 1011 /* Default value is already OK. */
1012 1012 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1013 1013 break;
1014 1014
1015 1015 /* Verify the label can be converted to binary form */
1016 1016 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1017 1017 (str_to_label(strval, &new_sl, MAC_LABEL,
1018 1018 L_NO_CORRECTION, NULL) == -1)) {
1019 1019 goto badlabel;
1020 1020 }
1021 1021
1022 1022 /* Now translate to hex internal label string */
1023 1023 if (label_to_str(new_sl, &hex, M_INTERNAL,
1024 1024 DEF_NAMES) != 0) {
1025 1025 if (hex)
1026 1026 free(hex);
1027 1027 goto badlabel;
1028 1028 }
1029 1029 m_label_free(new_sl);
1030 1030
1031 1031 /* If string is already in internal form, we're done. */
1032 1032 if (strcmp(strval, hex) == 0) {
1033 1033 free(hex);
1034 1034 break;
1035 1035 }
1036 1036
1037 1037 /* Replace the label string with the internal form. */
1038 1038 (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1039 1039 DATA_TYPE_STRING);
1040 1040 verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1041 1041 hex) == 0);
1042 1042 free(hex);
1043 1043
1044 1044 break;
1045 1045
1046 1046 badlabel:
1047 1047 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1048 1048 "invalid mlslabel '%s'"), strval);
1049 1049 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1050 1050 m_label_free(new_sl); /* OK if null */
1051 1051 goto error;
1052 1052
1053 1053 }
1054 1054
1055 1055 case ZFS_PROP_MOUNTPOINT:
1056 1056 {
1057 1057 namecheck_err_t why;
1058 1058
1059 1059 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1060 1060 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1061 1061 break;
1062 1062
1063 1063 if (mountpoint_namecheck(strval, &why)) {
1064 1064 switch (why) {
1065 1065 case NAME_ERR_LEADING_SLASH:
1066 1066 zfs_error_aux(hdl,
1067 1067 dgettext(TEXT_DOMAIN,
1068 1068 "'%s' must be an absolute path, "
1069 1069 "'none', or 'legacy'"), propname);
1070 1070 break;
1071 1071 case NAME_ERR_TOOLONG:
1072 1072 zfs_error_aux(hdl,
1073 1073 dgettext(TEXT_DOMAIN,
1074 1074 "component of '%s' is too long"),
1075 1075 propname);
1076 1076 break;
1077 1077 }
1078 1078 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1079 1079 goto error;
1080 1080 }
1081 1081 }
1082 1082
1083 1083 /*FALLTHRU*/
1084 1084
1085 1085 case ZFS_PROP_SHARESMB:
1086 1086 case ZFS_PROP_SHARENFS:
1087 1087 /*
1088 1088 * For the mountpoint and sharenfs or sharesmb
1089 1089 * properties, check if it can be set in a
1090 1090 * global/non-global zone based on
1091 1091 * the zoned property value:
1092 1092 *
1093 1093 * global zone non-global zone
1094 1094 * --------------------------------------------------
1095 1095 * zoned=on mountpoint (no) mountpoint (yes)
1096 1096 * sharenfs (no) sharenfs (no)
1097 1097 * sharesmb (no) sharesmb (no)
1098 1098 *
1099 1099 * zoned=off mountpoint (yes) N/A
1100 1100 * sharenfs (yes)
1101 1101 * sharesmb (yes)
1102 1102 */
1103 1103 if (zoned) {
1104 1104 if (getzoneid() == GLOBAL_ZONEID) {
1105 1105 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1106 1106 "'%s' cannot be set on "
1107 1107 "dataset in a non-global zone"),
1108 1108 propname);
1109 1109 (void) zfs_error(hdl, EZFS_ZONED,
1110 1110 errbuf);
1111 1111 goto error;
1112 1112 } else if (prop == ZFS_PROP_SHARENFS ||
1113 1113 prop == ZFS_PROP_SHARESMB) {
1114 1114 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1115 1115 "'%s' cannot be set in "
1116 1116 "a non-global zone"), propname);
1117 1117 (void) zfs_error(hdl, EZFS_ZONED,
1118 1118 errbuf);
1119 1119 goto error;
1120 1120 }
1121 1121 } else if (getzoneid() != GLOBAL_ZONEID) {
1122 1122 /*
1123 1123 * If zoned property is 'off', this must be in
1124 1124 * a global zone. If not, something is wrong.
1125 1125 */
1126 1126 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1127 1127 "'%s' cannot be set while dataset "
1128 1128 "'zoned' property is set"), propname);
1129 1129 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1130 1130 goto error;
1131 1131 }
1132 1132
1133 1133 /*
1134 1134 * At this point, it is legitimate to set the
1135 1135 * property. Now we want to make sure that the
1136 1136 * property value is valid if it is sharenfs.
1137 1137 */
1138 1138 if ((prop == ZFS_PROP_SHARENFS ||
1139 1139 prop == ZFS_PROP_SHARESMB) &&
1140 1140 strcmp(strval, "on") != 0 &&
1141 1141 strcmp(strval, "off") != 0) {
1142 1142 zfs_share_proto_t proto;
1143 1143
1144 1144 if (prop == ZFS_PROP_SHARESMB)
1145 1145 proto = PROTO_SMB;
1146 1146 else
1147 1147 proto = PROTO_NFS;
1148 1148
1149 1149 /*
1150 1150 * Must be an valid sharing protocol
1151 1151 * option string so init the libshare
1152 1152 * in order to enable the parser and
1153 1153 * then parse the options. We use the
1154 1154 * control API since we don't care about
1155 1155 * the current configuration and don't
1156 1156 * want the overhead of loading it
1157 1157 * until we actually do something.
1158 1158 */
1159 1159
1160 1160 if (zfs_init_libshare(hdl,
1161 1161 SA_INIT_CONTROL_API) != SA_OK) {
1162 1162 /*
1163 1163 * An error occurred so we can't do
1164 1164 * anything
1165 1165 */
1166 1166 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1167 1167 "'%s' cannot be set: problem "
1168 1168 "in share initialization"),
1169 1169 propname);
1170 1170 (void) zfs_error(hdl, EZFS_BADPROP,
1171 1171 errbuf);
1172 1172 goto error;
1173 1173 }
1174 1174
1175 1175 if (zfs_parse_options(strval, proto) != SA_OK) {
1176 1176 /*
1177 1177 * There was an error in parsing so
1178 1178 * deal with it by issuing an error
1179 1179 * message and leaving after
1180 1180 * uninitializing the the libshare
1181 1181 * interface.
1182 1182 */
1183 1183 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1184 1184 "'%s' cannot be set to invalid "
1185 1185 "options"), propname);
1186 1186 (void) zfs_error(hdl, EZFS_BADPROP,
1187 1187 errbuf);
1188 1188 zfs_uninit_libshare(hdl);
1189 1189 goto error;
1190 1190 }
1191 1191 zfs_uninit_libshare(hdl);
1192 1192 }
1193 1193
1194 1194 break;
1195 1195 case ZFS_PROP_UTF8ONLY:
1196 1196 chosen_utf = (int)intval;
1197 1197 break;
1198 1198 case ZFS_PROP_NORMALIZE:
1199 1199 chosen_normal = (int)intval;
1200 1200 break;
1201 1201 }
1202 1202
1203 1203 /*
1204 1204 * For changes to existing volumes, we have some additional
1205 1205 * checks to enforce.
1206 1206 */
1207 1207 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1208 1208 uint64_t volsize = zfs_prop_get_int(zhp,
1209 1209 ZFS_PROP_VOLSIZE);
1210 1210 uint64_t blocksize = zfs_prop_get_int(zhp,
1211 1211 ZFS_PROP_VOLBLOCKSIZE);
1212 1212 char buf[64];
1213 1213
1214 1214 switch (prop) {
1215 1215 case ZFS_PROP_RESERVATION:
1216 1216 case ZFS_PROP_REFRESERVATION:
1217 1217 if (intval > volsize) {
1218 1218 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1219 1219 "'%s' is greater than current "
1220 1220 "volume size"), propname);
1221 1221 (void) zfs_error(hdl, EZFS_BADPROP,
1222 1222 errbuf);
1223 1223 goto error;
1224 1224 }
1225 1225 break;
1226 1226
1227 1227 case ZFS_PROP_VOLSIZE:
1228 1228 if (intval % blocksize != 0) {
1229 1229 zfs_nicenum(blocksize, buf,
1230 1230 sizeof (buf));
1231 1231 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1232 1232 "'%s' must be a multiple of "
1233 1233 "volume block size (%s)"),
1234 1234 propname, buf);
1235 1235 (void) zfs_error(hdl, EZFS_BADPROP,
1236 1236 errbuf);
1237 1237 goto error;
1238 1238 }
1239 1239
1240 1240 if (intval == 0) {
1241 1241 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1242 1242 "'%s' cannot be zero"),
1243 1243 propname);
1244 1244 (void) zfs_error(hdl, EZFS_BADPROP,
1245 1245 errbuf);
1246 1246 goto error;
1247 1247 }
1248 1248 break;
1249 1249 }
1250 1250 }
1251 1251 }
1252 1252
1253 1253 /*
1254 1254 * If normalization was chosen, but no UTF8 choice was made,
1255 1255 * enforce rejection of non-UTF8 names.
1256 1256 *
1257 1257 * If normalization was chosen, but rejecting non-UTF8 names
1258 1258 * was explicitly not chosen, it is an error.
1259 1259 */
1260 1260 if (chosen_normal > 0 && chosen_utf < 0) {
1261 1261 if (nvlist_add_uint64(ret,
1262 1262 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1263 1263 (void) no_memory(hdl);
1264 1264 goto error;
1265 1265 }
1266 1266 } else if (chosen_normal > 0 && chosen_utf == 0) {
1267 1267 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1268 1268 "'%s' must be set 'on' if normalization chosen"),
1269 1269 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1270 1270 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1271 1271 goto error;
1272 1272 }
1273 1273 return (ret);
1274 1274
1275 1275 error:
1276 1276 nvlist_free(ret);
1277 1277 return (NULL);
1278 1278 }
1279 1279
1280 1280 int
1281 1281 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1282 1282 {
1283 1283 uint64_t old_volsize;
1284 1284 uint64_t new_volsize;
1285 1285 uint64_t old_reservation;
1286 1286 uint64_t new_reservation;
1287 1287 zfs_prop_t resv_prop;
1288 1288 nvlist_t *props;
1289 1289
1290 1290 /*
1291 1291 * If this is an existing volume, and someone is setting the volsize,
1292 1292 * make sure that it matches the reservation, or add it if necessary.
1293 1293 */
1294 1294 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1295 1295 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1296 1296 return (-1);
1297 1297 old_reservation = zfs_prop_get_int(zhp, resv_prop);
1298 1298
1299 1299 props = fnvlist_alloc();
1300 1300 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1301 1301 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1302 1302
1303 1303 if ((zvol_volsize_to_reservation(old_volsize, props) !=
1304 1304 old_reservation) || nvlist_exists(nvl,
1305 1305 zfs_prop_to_name(resv_prop))) {
1306 1306 fnvlist_free(props);
1307 1307 return (0);
1308 1308 }
1309 1309 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1310 1310 &new_volsize) != 0) {
1311 1311 fnvlist_free(props);
1312 1312 return (-1);
1313 1313 }
1314 1314 new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1315 1315 fnvlist_free(props);
1316 1316
1317 1317 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1318 1318 new_reservation) != 0) {
1319 1319 (void) no_memory(zhp->zfs_hdl);
1320 1320 return (-1);
1321 1321 }
1322 1322 return (1);
1323 1323 }
1324 1324
1325 1325 void
1326 1326 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1327 1327 char *errbuf)
1328 1328 {
1329 1329 switch (err) {
1330 1330
1331 1331 case ENOSPC:
1332 1332 /*
1333 1333 * For quotas and reservations, ENOSPC indicates
1334 1334 * something different; setting a quota or reservation
1335 1335 * doesn't use any disk space.
1336 1336 */
1337 1337 switch (prop) {
1338 1338 case ZFS_PROP_QUOTA:
1339 1339 case ZFS_PROP_REFQUOTA:
1340 1340 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1341 1341 "size is less than current used or "
1342 1342 "reserved space"));
1343 1343 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1344 1344 break;
1345 1345
1346 1346 case ZFS_PROP_RESERVATION:
1347 1347 case ZFS_PROP_REFRESERVATION:
1348 1348 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1349 1349 "size is greater than available space"));
1350 1350 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1351 1351 break;
1352 1352
1353 1353 default:
1354 1354 (void) zfs_standard_error(hdl, err, errbuf);
1355 1355 break;
1356 1356 }
1357 1357 break;
1358 1358
1359 1359 case EBUSY:
1360 1360 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1361 1361 break;
1362 1362
1363 1363 case EROFS:
1364 1364 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1365 1365 break;
1366 1366
1367 1367 case ENOTSUP:
1368 1368 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1369 1369 "pool and or dataset must be upgraded to set this "
|
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1369 lines elided |
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1370 1370 "property or value"));
1371 1371 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1372 1372 break;
1373 1373
1374 1374 case ERANGE:
1375 1375 if (prop == ZFS_PROP_COMPRESSION) {
1376 1376 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1377 1377 "property setting is not allowed on "
1378 1378 "bootable datasets"));
1379 1379 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1380 + } else if (prop == ZFS_PROP_CHECKSUM ||
1381 + prop == ZFS_PROP_DEDUP) {
1382 + (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1383 + "property setting is not allowed on "
1384 + "root pools"));
1385 + (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1380 1386 } else {
1381 1387 (void) zfs_standard_error(hdl, err, errbuf);
1382 1388 }
1383 1389 break;
1384 1390
1385 1391 case EINVAL:
1386 1392 if (prop == ZPROP_INVAL) {
1387 1393 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1388 1394 } else {
1389 1395 (void) zfs_standard_error(hdl, err, errbuf);
1390 1396 }
1391 1397 break;
1392 1398
1393 1399 case EOVERFLOW:
1394 1400 /*
1395 1401 * This platform can't address a volume this big.
1396 1402 */
1397 1403 #ifdef _ILP32
1398 1404 if (prop == ZFS_PROP_VOLSIZE) {
1399 1405 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1400 1406 break;
1401 1407 }
1402 1408 #endif
1403 1409 /* FALLTHROUGH */
1404 1410 default:
1405 1411 (void) zfs_standard_error(hdl, err, errbuf);
1406 1412 }
1407 1413 }
1408 1414
1409 1415 /*
1410 1416 * Given a property name and value, set the property for the given dataset.
1411 1417 */
1412 1418 int
1413 1419 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1414 1420 {
1415 1421 zfs_cmd_t zc = { 0 };
1416 1422 int ret = -1;
1417 1423 prop_changelist_t *cl = NULL;
1418 1424 char errbuf[1024];
1419 1425 libzfs_handle_t *hdl = zhp->zfs_hdl;
1420 1426 nvlist_t *nvl = NULL, *realprops;
1421 1427 zfs_prop_t prop;
1422 1428 boolean_t do_prefix = B_TRUE;
1423 1429 int added_resv;
1424 1430
1425 1431 (void) snprintf(errbuf, sizeof (errbuf),
1426 1432 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1427 1433 zhp->zfs_name);
1428 1434
1429 1435 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1430 1436 nvlist_add_string(nvl, propname, propval) != 0) {
1431 1437 (void) no_memory(hdl);
1432 1438 goto error;
1433 1439 }
1434 1440
1435 1441 if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl,
1436 1442 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
1437 1443 goto error;
1438 1444
1439 1445 nvlist_free(nvl);
1440 1446 nvl = realprops;
1441 1447
1442 1448 prop = zfs_name_to_prop(propname);
1443 1449
1444 1450 if (prop == ZFS_PROP_VOLSIZE) {
1445 1451 if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1)
1446 1452 goto error;
1447 1453 }
1448 1454
1449 1455 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1450 1456 goto error;
1451 1457
1452 1458 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1453 1459 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1454 1460 "child dataset with inherited mountpoint is used "
1455 1461 "in a non-global zone"));
1456 1462 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1457 1463 goto error;
1458 1464 }
1459 1465
1460 1466 /*
1461 1467 * We don't want to unmount & remount the dataset when changing
1462 1468 * its canmount property to 'on' or 'noauto'. We only use
1463 1469 * the changelist logic to unmount when setting canmount=off.
1464 1470 */
1465 1471 if (prop == ZFS_PROP_CANMOUNT) {
1466 1472 uint64_t idx;
1467 1473 int err = zprop_string_to_index(prop, propval, &idx,
1468 1474 ZFS_TYPE_DATASET);
1469 1475 if (err == 0 && idx != ZFS_CANMOUNT_OFF)
1470 1476 do_prefix = B_FALSE;
1471 1477 }
1472 1478
1473 1479 if (do_prefix && (ret = changelist_prefix(cl)) != 0)
1474 1480 goto error;
1475 1481
1476 1482 /*
1477 1483 * Execute the corresponding ioctl() to set this property.
1478 1484 */
1479 1485 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1480 1486
1481 1487 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1482 1488 goto error;
1483 1489
1484 1490 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1485 1491
1486 1492 if (ret != 0) {
1487 1493 zfs_setprop_error(hdl, prop, errno, errbuf);
1488 1494 if (added_resv && errno == ENOSPC) {
1489 1495 /* clean up the volsize property we tried to set */
1490 1496 uint64_t old_volsize = zfs_prop_get_int(zhp,
1491 1497 ZFS_PROP_VOLSIZE);
1492 1498 nvlist_free(nvl);
1493 1499 zcmd_free_nvlists(&zc);
1494 1500 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1495 1501 goto error;
1496 1502 if (nvlist_add_uint64(nvl,
1497 1503 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1498 1504 old_volsize) != 0)
1499 1505 goto error;
1500 1506 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1501 1507 goto error;
1502 1508 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1503 1509 }
1504 1510 } else {
1505 1511 if (do_prefix)
1506 1512 ret = changelist_postfix(cl);
1507 1513
1508 1514 /*
1509 1515 * Refresh the statistics so the new property value
1510 1516 * is reflected.
1511 1517 */
1512 1518 if (ret == 0)
1513 1519 (void) get_stats(zhp);
1514 1520 }
1515 1521
1516 1522 error:
1517 1523 nvlist_free(nvl);
1518 1524 zcmd_free_nvlists(&zc);
1519 1525 if (cl)
1520 1526 changelist_free(cl);
1521 1527 return (ret);
1522 1528 }
1523 1529
1524 1530 /*
1525 1531 * Given a property, inherit the value from the parent dataset, or if received
1526 1532 * is TRUE, revert to the received value, if any.
1527 1533 */
1528 1534 int
1529 1535 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1530 1536 {
1531 1537 zfs_cmd_t zc = { 0 };
1532 1538 int ret;
1533 1539 prop_changelist_t *cl;
1534 1540 libzfs_handle_t *hdl = zhp->zfs_hdl;
1535 1541 char errbuf[1024];
1536 1542 zfs_prop_t prop;
1537 1543
1538 1544 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1539 1545 "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1540 1546
1541 1547 zc.zc_cookie = received;
1542 1548 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1543 1549 /*
1544 1550 * For user properties, the amount of work we have to do is very
1545 1551 * small, so just do it here.
1546 1552 */
1547 1553 if (!zfs_prop_user(propname)) {
1548 1554 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1549 1555 "invalid property"));
1550 1556 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1551 1557 }
1552 1558
1553 1559 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1554 1560 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1555 1561
1556 1562 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1557 1563 return (zfs_standard_error(hdl, errno, errbuf));
1558 1564
1559 1565 return (0);
1560 1566 }
1561 1567
1562 1568 /*
1563 1569 * Verify that this property is inheritable.
1564 1570 */
1565 1571 if (zfs_prop_readonly(prop))
1566 1572 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1567 1573
1568 1574 if (!zfs_prop_inheritable(prop) && !received)
1569 1575 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1570 1576
1571 1577 /*
1572 1578 * Check to see if the value applies to this type
1573 1579 */
1574 1580 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1575 1581 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1576 1582
1577 1583 /*
1578 1584 * Normalize the name, to get rid of shorthand abbreviations.
1579 1585 */
1580 1586 propname = zfs_prop_to_name(prop);
1581 1587 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1582 1588 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1583 1589
1584 1590 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1585 1591 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1586 1592 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1587 1593 "dataset is used in a non-global zone"));
1588 1594 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1589 1595 }
1590 1596
1591 1597 /*
1592 1598 * Determine datasets which will be affected by this change, if any.
1593 1599 */
1594 1600 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1595 1601 return (-1);
1596 1602
1597 1603 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1598 1604 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1599 1605 "child dataset with inherited mountpoint is used "
1600 1606 "in a non-global zone"));
1601 1607 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1602 1608 goto error;
1603 1609 }
1604 1610
1605 1611 if ((ret = changelist_prefix(cl)) != 0)
1606 1612 goto error;
1607 1613
1608 1614 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1609 1615 return (zfs_standard_error(hdl, errno, errbuf));
1610 1616 } else {
1611 1617
1612 1618 if ((ret = changelist_postfix(cl)) != 0)
1613 1619 goto error;
1614 1620
1615 1621 /*
1616 1622 * Refresh the statistics so the new property is reflected.
1617 1623 */
1618 1624 (void) get_stats(zhp);
1619 1625 }
1620 1626
1621 1627 error:
1622 1628 changelist_free(cl);
1623 1629 return (ret);
1624 1630 }
1625 1631
1626 1632 /*
1627 1633 * True DSL properties are stored in an nvlist. The following two functions
1628 1634 * extract them appropriately.
1629 1635 */
1630 1636 static uint64_t
1631 1637 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1632 1638 {
1633 1639 nvlist_t *nv;
1634 1640 uint64_t value;
1635 1641
1636 1642 *source = NULL;
1637 1643 if (nvlist_lookup_nvlist(zhp->zfs_props,
1638 1644 zfs_prop_to_name(prop), &nv) == 0) {
1639 1645 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1640 1646 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1641 1647 } else {
1642 1648 verify(!zhp->zfs_props_table ||
1643 1649 zhp->zfs_props_table[prop] == B_TRUE);
1644 1650 value = zfs_prop_default_numeric(prop);
1645 1651 *source = "";
1646 1652 }
1647 1653
1648 1654 return (value);
1649 1655 }
1650 1656
1651 1657 static char *
1652 1658 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1653 1659 {
1654 1660 nvlist_t *nv;
1655 1661 char *value;
1656 1662
1657 1663 *source = NULL;
1658 1664 if (nvlist_lookup_nvlist(zhp->zfs_props,
1659 1665 zfs_prop_to_name(prop), &nv) == 0) {
1660 1666 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
1661 1667 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1662 1668 } else {
1663 1669 verify(!zhp->zfs_props_table ||
1664 1670 zhp->zfs_props_table[prop] == B_TRUE);
1665 1671 if ((value = (char *)zfs_prop_default_string(prop)) == NULL)
1666 1672 value = "";
1667 1673 *source = "";
1668 1674 }
1669 1675
1670 1676 return (value);
1671 1677 }
1672 1678
1673 1679 static boolean_t
1674 1680 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1675 1681 {
1676 1682 return (zhp->zfs_props == zhp->zfs_recvd_props);
1677 1683 }
1678 1684
1679 1685 static void
1680 1686 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1681 1687 {
1682 1688 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1683 1689 zhp->zfs_props = zhp->zfs_recvd_props;
1684 1690 }
1685 1691
1686 1692 static void
1687 1693 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1688 1694 {
1689 1695 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1690 1696 *cookie = 0;
1691 1697 }
1692 1698
1693 1699 /*
1694 1700 * Internal function for getting a numeric property. Both zfs_prop_get() and
1695 1701 * zfs_prop_get_int() are built using this interface.
1696 1702 *
1697 1703 * Certain properties can be overridden using 'mount -o'. In this case, scan
1698 1704 * the contents of the /etc/mnttab entry, searching for the appropriate options.
1699 1705 * If they differ from the on-disk values, report the current values and mark
1700 1706 * the source "temporary".
1701 1707 */
1702 1708 static int
1703 1709 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1704 1710 char **source, uint64_t *val)
1705 1711 {
1706 1712 zfs_cmd_t zc = { 0 };
1707 1713 nvlist_t *zplprops = NULL;
1708 1714 struct mnttab mnt;
1709 1715 char *mntopt_on = NULL;
1710 1716 char *mntopt_off = NULL;
1711 1717 boolean_t received = zfs_is_recvd_props_mode(zhp);
1712 1718
1713 1719 *source = NULL;
1714 1720
1715 1721 switch (prop) {
1716 1722 case ZFS_PROP_ATIME:
1717 1723 mntopt_on = MNTOPT_ATIME;
1718 1724 mntopt_off = MNTOPT_NOATIME;
1719 1725 break;
1720 1726
1721 1727 case ZFS_PROP_DEVICES:
1722 1728 mntopt_on = MNTOPT_DEVICES;
1723 1729 mntopt_off = MNTOPT_NODEVICES;
1724 1730 break;
1725 1731
1726 1732 case ZFS_PROP_EXEC:
1727 1733 mntopt_on = MNTOPT_EXEC;
1728 1734 mntopt_off = MNTOPT_NOEXEC;
1729 1735 break;
1730 1736
1731 1737 case ZFS_PROP_READONLY:
1732 1738 mntopt_on = MNTOPT_RO;
1733 1739 mntopt_off = MNTOPT_RW;
1734 1740 break;
1735 1741
1736 1742 case ZFS_PROP_SETUID:
1737 1743 mntopt_on = MNTOPT_SETUID;
1738 1744 mntopt_off = MNTOPT_NOSETUID;
1739 1745 break;
1740 1746
1741 1747 case ZFS_PROP_XATTR:
1742 1748 mntopt_on = MNTOPT_XATTR;
1743 1749 mntopt_off = MNTOPT_NOXATTR;
1744 1750 break;
1745 1751
1746 1752 case ZFS_PROP_NBMAND:
1747 1753 mntopt_on = MNTOPT_NBMAND;
1748 1754 mntopt_off = MNTOPT_NONBMAND;
1749 1755 break;
1750 1756 }
1751 1757
1752 1758 /*
1753 1759 * Because looking up the mount options is potentially expensive
1754 1760 * (iterating over all of /etc/mnttab), we defer its calculation until
1755 1761 * we're looking up a property which requires its presence.
1756 1762 */
1757 1763 if (!zhp->zfs_mntcheck &&
1758 1764 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1759 1765 libzfs_handle_t *hdl = zhp->zfs_hdl;
1760 1766 struct mnttab entry;
1761 1767
1762 1768 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1763 1769 zhp->zfs_mntopts = zfs_strdup(hdl,
1764 1770 entry.mnt_mntopts);
1765 1771 if (zhp->zfs_mntopts == NULL)
1766 1772 return (-1);
1767 1773 }
1768 1774
1769 1775 zhp->zfs_mntcheck = B_TRUE;
1770 1776 }
1771 1777
1772 1778 if (zhp->zfs_mntopts == NULL)
1773 1779 mnt.mnt_mntopts = "";
1774 1780 else
1775 1781 mnt.mnt_mntopts = zhp->zfs_mntopts;
1776 1782
1777 1783 switch (prop) {
1778 1784 case ZFS_PROP_ATIME:
1779 1785 case ZFS_PROP_DEVICES:
1780 1786 case ZFS_PROP_EXEC:
1781 1787 case ZFS_PROP_READONLY:
1782 1788 case ZFS_PROP_SETUID:
1783 1789 case ZFS_PROP_XATTR:
1784 1790 case ZFS_PROP_NBMAND:
1785 1791 *val = getprop_uint64(zhp, prop, source);
1786 1792
1787 1793 if (received)
1788 1794 break;
1789 1795
1790 1796 if (hasmntopt(&mnt, mntopt_on) && !*val) {
1791 1797 *val = B_TRUE;
1792 1798 if (src)
1793 1799 *src = ZPROP_SRC_TEMPORARY;
1794 1800 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
1795 1801 *val = B_FALSE;
1796 1802 if (src)
1797 1803 *src = ZPROP_SRC_TEMPORARY;
1798 1804 }
1799 1805 break;
1800 1806
1801 1807 case ZFS_PROP_CANMOUNT:
1802 1808 case ZFS_PROP_VOLSIZE:
1803 1809 case ZFS_PROP_QUOTA:
1804 1810 case ZFS_PROP_REFQUOTA:
1805 1811 case ZFS_PROP_RESERVATION:
1806 1812 case ZFS_PROP_REFRESERVATION:
1807 1813 *val = getprop_uint64(zhp, prop, source);
1808 1814
1809 1815 if (*source == NULL) {
1810 1816 /* not default, must be local */
1811 1817 *source = zhp->zfs_name;
1812 1818 }
1813 1819 break;
1814 1820
1815 1821 case ZFS_PROP_MOUNTED:
1816 1822 *val = (zhp->zfs_mntopts != NULL);
1817 1823 break;
1818 1824
1819 1825 case ZFS_PROP_NUMCLONES:
1820 1826 *val = zhp->zfs_dmustats.dds_num_clones;
1821 1827 break;
1822 1828
1823 1829 case ZFS_PROP_VERSION:
1824 1830 case ZFS_PROP_NORMALIZE:
1825 1831 case ZFS_PROP_UTF8ONLY:
1826 1832 case ZFS_PROP_CASE:
1827 1833 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
1828 1834 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
1829 1835 return (-1);
1830 1836 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1831 1837 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
1832 1838 zcmd_free_nvlists(&zc);
1833 1839 return (-1);
1834 1840 }
1835 1841 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
1836 1842 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
1837 1843 val) != 0) {
1838 1844 zcmd_free_nvlists(&zc);
1839 1845 return (-1);
1840 1846 }
1841 1847 if (zplprops)
1842 1848 nvlist_free(zplprops);
1843 1849 zcmd_free_nvlists(&zc);
1844 1850 break;
1845 1851
1846 1852 case ZFS_PROP_INCONSISTENT:
1847 1853 *val = zhp->zfs_dmustats.dds_inconsistent;
1848 1854 break;
1849 1855
1850 1856 default:
1851 1857 switch (zfs_prop_get_type(prop)) {
1852 1858 case PROP_TYPE_NUMBER:
1853 1859 case PROP_TYPE_INDEX:
1854 1860 *val = getprop_uint64(zhp, prop, source);
1855 1861 /*
1856 1862 * If we tried to use a default value for a
1857 1863 * readonly property, it means that it was not
1858 1864 * present.
1859 1865 */
1860 1866 if (zfs_prop_readonly(prop) &&
1861 1867 *source != NULL && (*source)[0] == '\0') {
1862 1868 *source = NULL;
1863 1869 }
1864 1870 break;
1865 1871
1866 1872 case PROP_TYPE_STRING:
1867 1873 default:
1868 1874 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
1869 1875 "cannot get non-numeric property"));
1870 1876 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
1871 1877 dgettext(TEXT_DOMAIN, "internal error")));
1872 1878 }
1873 1879 }
1874 1880
1875 1881 return (0);
1876 1882 }
1877 1883
1878 1884 /*
1879 1885 * Calculate the source type, given the raw source string.
1880 1886 */
1881 1887 static void
1882 1888 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
1883 1889 char *statbuf, size_t statlen)
1884 1890 {
1885 1891 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
1886 1892 return;
1887 1893
1888 1894 if (source == NULL) {
1889 1895 *srctype = ZPROP_SRC_NONE;
1890 1896 } else if (source[0] == '\0') {
1891 1897 *srctype = ZPROP_SRC_DEFAULT;
1892 1898 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
1893 1899 *srctype = ZPROP_SRC_RECEIVED;
1894 1900 } else {
1895 1901 if (strcmp(source, zhp->zfs_name) == 0) {
1896 1902 *srctype = ZPROP_SRC_LOCAL;
1897 1903 } else {
1898 1904 (void) strlcpy(statbuf, source, statlen);
1899 1905 *srctype = ZPROP_SRC_INHERITED;
1900 1906 }
1901 1907 }
1902 1908
1903 1909 }
1904 1910
1905 1911 int
1906 1912 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
1907 1913 size_t proplen, boolean_t literal)
1908 1914 {
1909 1915 zfs_prop_t prop;
1910 1916 int err = 0;
1911 1917
1912 1918 if (zhp->zfs_recvd_props == NULL)
1913 1919 if (get_recvd_props_ioctl(zhp) != 0)
1914 1920 return (-1);
1915 1921
1916 1922 prop = zfs_name_to_prop(propname);
1917 1923
1918 1924 if (prop != ZPROP_INVAL) {
1919 1925 uint64_t cookie;
1920 1926 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
1921 1927 return (-1);
1922 1928 zfs_set_recvd_props_mode(zhp, &cookie);
1923 1929 err = zfs_prop_get(zhp, prop, propbuf, proplen,
1924 1930 NULL, NULL, 0, literal);
1925 1931 zfs_unset_recvd_props_mode(zhp, &cookie);
1926 1932 } else {
1927 1933 nvlist_t *propval;
1928 1934 char *recvdval;
1929 1935 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
1930 1936 propname, &propval) != 0)
1931 1937 return (-1);
1932 1938 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
1933 1939 &recvdval) == 0);
1934 1940 (void) strlcpy(propbuf, recvdval, proplen);
1935 1941 }
1936 1942
1937 1943 return (err == 0 ? 0 : -1);
1938 1944 }
1939 1945
1940 1946 static int
1941 1947 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
1942 1948 {
1943 1949 nvlist_t *value;
1944 1950 nvpair_t *pair;
1945 1951
1946 1952 value = zfs_get_clones_nvl(zhp);
1947 1953 if (value == NULL)
1948 1954 return (-1);
1949 1955
1950 1956 propbuf[0] = '\0';
1951 1957 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
1952 1958 pair = nvlist_next_nvpair(value, pair)) {
1953 1959 if (propbuf[0] != '\0')
1954 1960 (void) strlcat(propbuf, ",", proplen);
1955 1961 (void) strlcat(propbuf, nvpair_name(pair), proplen);
1956 1962 }
1957 1963
1958 1964 return (0);
1959 1965 }
1960 1966
1961 1967 struct get_clones_arg {
1962 1968 uint64_t numclones;
1963 1969 nvlist_t *value;
1964 1970 const char *origin;
1965 1971 char buf[ZFS_MAXNAMELEN];
1966 1972 };
1967 1973
1968 1974 int
1969 1975 get_clones_cb(zfs_handle_t *zhp, void *arg)
1970 1976 {
1971 1977 struct get_clones_arg *gca = arg;
1972 1978
1973 1979 if (gca->numclones == 0) {
1974 1980 zfs_close(zhp);
1975 1981 return (0);
1976 1982 }
1977 1983
1978 1984 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
1979 1985 NULL, NULL, 0, B_TRUE) != 0)
1980 1986 goto out;
1981 1987 if (strcmp(gca->buf, gca->origin) == 0) {
1982 1988 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
1983 1989 gca->numclones--;
1984 1990 }
1985 1991
1986 1992 out:
1987 1993 (void) zfs_iter_children(zhp, get_clones_cb, gca);
1988 1994 zfs_close(zhp);
1989 1995 return (0);
1990 1996 }
1991 1997
1992 1998 nvlist_t *
1993 1999 zfs_get_clones_nvl(zfs_handle_t *zhp)
1994 2000 {
1995 2001 nvlist_t *nv, *value;
1996 2002
1997 2003 if (nvlist_lookup_nvlist(zhp->zfs_props,
1998 2004 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
1999 2005 struct get_clones_arg gca;
2000 2006
2001 2007 /*
2002 2008 * if this is a snapshot, then the kernel wasn't able
2003 2009 * to get the clones. Do it by slowly iterating.
2004 2010 */
2005 2011 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2006 2012 return (NULL);
2007 2013 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2008 2014 return (NULL);
2009 2015 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2010 2016 nvlist_free(nv);
2011 2017 return (NULL);
2012 2018 }
2013 2019
2014 2020 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2015 2021 gca.value = value;
2016 2022 gca.origin = zhp->zfs_name;
2017 2023
2018 2024 if (gca.numclones != 0) {
2019 2025 zfs_handle_t *root;
2020 2026 char pool[ZFS_MAXNAMELEN];
2021 2027 char *cp = pool;
2022 2028
2023 2029 /* get the pool name */
2024 2030 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2025 2031 (void) strsep(&cp, "/@");
2026 2032 root = zfs_open(zhp->zfs_hdl, pool,
2027 2033 ZFS_TYPE_FILESYSTEM);
2028 2034
2029 2035 (void) get_clones_cb(root, &gca);
2030 2036 }
2031 2037
2032 2038 if (gca.numclones != 0 ||
2033 2039 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2034 2040 nvlist_add_nvlist(zhp->zfs_props,
2035 2041 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2036 2042 nvlist_free(nv);
2037 2043 nvlist_free(value);
2038 2044 return (NULL);
2039 2045 }
2040 2046 nvlist_free(nv);
2041 2047 nvlist_free(value);
2042 2048 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2043 2049 zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2044 2050 }
2045 2051
2046 2052 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2047 2053
2048 2054 return (value);
2049 2055 }
2050 2056
2051 2057 /*
2052 2058 * Retrieve a property from the given object. If 'literal' is specified, then
2053 2059 * numbers are left as exact values. Otherwise, numbers are converted to a
2054 2060 * human-readable form.
2055 2061 *
2056 2062 * Returns 0 on success, or -1 on error.
2057 2063 */
2058 2064 int
2059 2065 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2060 2066 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2061 2067 {
2062 2068 char *source = NULL;
2063 2069 uint64_t val;
2064 2070 char *str;
2065 2071 const char *strval;
2066 2072 boolean_t received = zfs_is_recvd_props_mode(zhp);
2067 2073
2068 2074 /*
2069 2075 * Check to see if this property applies to our object
2070 2076 */
2071 2077 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2072 2078 return (-1);
2073 2079
2074 2080 if (received && zfs_prop_readonly(prop))
2075 2081 return (-1);
2076 2082
2077 2083 if (src)
2078 2084 *src = ZPROP_SRC_NONE;
2079 2085
2080 2086 switch (prop) {
2081 2087 case ZFS_PROP_CREATION:
2082 2088 /*
2083 2089 * 'creation' is a time_t stored in the statistics. We convert
2084 2090 * this into a string unless 'literal' is specified.
2085 2091 */
2086 2092 {
2087 2093 val = getprop_uint64(zhp, prop, &source);
2088 2094 time_t time = (time_t)val;
2089 2095 struct tm t;
2090 2096
2091 2097 if (literal ||
2092 2098 localtime_r(&time, &t) == NULL ||
2093 2099 strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2094 2100 &t) == 0)
2095 2101 (void) snprintf(propbuf, proplen, "%llu", val);
2096 2102 }
2097 2103 break;
2098 2104
2099 2105 case ZFS_PROP_MOUNTPOINT:
2100 2106 /*
2101 2107 * Getting the precise mountpoint can be tricky.
2102 2108 *
2103 2109 * - for 'none' or 'legacy', return those values.
2104 2110 * - for inherited mountpoints, we want to take everything
2105 2111 * after our ancestor and append it to the inherited value.
2106 2112 *
2107 2113 * If the pool has an alternate root, we want to prepend that
2108 2114 * root to any values we return.
2109 2115 */
2110 2116
2111 2117 str = getprop_string(zhp, prop, &source);
2112 2118
2113 2119 if (str[0] == '/') {
2114 2120 char buf[MAXPATHLEN];
2115 2121 char *root = buf;
2116 2122 const char *relpath;
2117 2123
2118 2124 /*
2119 2125 * If we inherit the mountpoint, even from a dataset
2120 2126 * with a received value, the source will be the path of
2121 2127 * the dataset we inherit from. If source is
2122 2128 * ZPROP_SOURCE_VAL_RECVD, the received value is not
2123 2129 * inherited.
2124 2130 */
2125 2131 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2126 2132 relpath = "";
2127 2133 } else {
2128 2134 relpath = zhp->zfs_name + strlen(source);
2129 2135 if (relpath[0] == '/')
2130 2136 relpath++;
2131 2137 }
2132 2138
2133 2139 if ((zpool_get_prop(zhp->zpool_hdl,
2134 2140 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL)) ||
2135 2141 (strcmp(root, "-") == 0))
2136 2142 root[0] = '\0';
2137 2143 /*
2138 2144 * Special case an alternate root of '/'. This will
2139 2145 * avoid having multiple leading slashes in the
2140 2146 * mountpoint path.
2141 2147 */
2142 2148 if (strcmp(root, "/") == 0)
2143 2149 root++;
2144 2150
2145 2151 /*
2146 2152 * If the mountpoint is '/' then skip over this
2147 2153 * if we are obtaining either an alternate root or
2148 2154 * an inherited mountpoint.
2149 2155 */
2150 2156 if (str[1] == '\0' && (root[0] != '\0' ||
2151 2157 relpath[0] != '\0'))
2152 2158 str++;
2153 2159
2154 2160 if (relpath[0] == '\0')
2155 2161 (void) snprintf(propbuf, proplen, "%s%s",
2156 2162 root, str);
2157 2163 else
2158 2164 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2159 2165 root, str, relpath[0] == '@' ? "" : "/",
2160 2166 relpath);
2161 2167 } else {
2162 2168 /* 'legacy' or 'none' */
2163 2169 (void) strlcpy(propbuf, str, proplen);
2164 2170 }
2165 2171
2166 2172 break;
2167 2173
2168 2174 case ZFS_PROP_ORIGIN:
2169 2175 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source),
2170 2176 proplen);
2171 2177 /*
2172 2178 * If there is no parent at all, return failure to indicate that
2173 2179 * it doesn't apply to this dataset.
2174 2180 */
2175 2181 if (propbuf[0] == '\0')
2176 2182 return (-1);
2177 2183 break;
2178 2184
2179 2185 case ZFS_PROP_CLONES:
2180 2186 if (get_clones_string(zhp, propbuf, proplen) != 0)
2181 2187 return (-1);
2182 2188 break;
2183 2189
2184 2190 case ZFS_PROP_QUOTA:
2185 2191 case ZFS_PROP_REFQUOTA:
2186 2192 case ZFS_PROP_RESERVATION:
2187 2193 case ZFS_PROP_REFRESERVATION:
2188 2194
2189 2195 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2190 2196 return (-1);
2191 2197
2192 2198 /*
2193 2199 * If quota or reservation is 0, we translate this into 'none'
2194 2200 * (unless literal is set), and indicate that it's the default
2195 2201 * value. Otherwise, we print the number nicely and indicate
2196 2202 * that its set locally.
2197 2203 */
2198 2204 if (val == 0) {
2199 2205 if (literal)
2200 2206 (void) strlcpy(propbuf, "0", proplen);
2201 2207 else
2202 2208 (void) strlcpy(propbuf, "none", proplen);
2203 2209 } else {
2204 2210 if (literal)
2205 2211 (void) snprintf(propbuf, proplen, "%llu",
2206 2212 (u_longlong_t)val);
2207 2213 else
2208 2214 zfs_nicenum(val, propbuf, proplen);
2209 2215 }
2210 2216 break;
2211 2217
2212 2218 case ZFS_PROP_REFRATIO:
2213 2219 case ZFS_PROP_COMPRESSRATIO:
2214 2220 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2215 2221 return (-1);
2216 2222 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2217 2223 (u_longlong_t)(val / 100),
2218 2224 (u_longlong_t)(val % 100));
2219 2225 break;
2220 2226
2221 2227 case ZFS_PROP_TYPE:
2222 2228 switch (zhp->zfs_type) {
2223 2229 case ZFS_TYPE_FILESYSTEM:
2224 2230 str = "filesystem";
2225 2231 break;
2226 2232 case ZFS_TYPE_VOLUME:
2227 2233 str = "volume";
2228 2234 break;
2229 2235 case ZFS_TYPE_SNAPSHOT:
2230 2236 str = "snapshot";
2231 2237 break;
2232 2238 default:
2233 2239 abort();
2234 2240 }
2235 2241 (void) snprintf(propbuf, proplen, "%s", str);
2236 2242 break;
2237 2243
2238 2244 case ZFS_PROP_MOUNTED:
2239 2245 /*
2240 2246 * The 'mounted' property is a pseudo-property that described
2241 2247 * whether the filesystem is currently mounted. Even though
2242 2248 * it's a boolean value, the typical values of "on" and "off"
2243 2249 * don't make sense, so we translate to "yes" and "no".
2244 2250 */
2245 2251 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2246 2252 src, &source, &val) != 0)
2247 2253 return (-1);
2248 2254 if (val)
2249 2255 (void) strlcpy(propbuf, "yes", proplen);
2250 2256 else
2251 2257 (void) strlcpy(propbuf, "no", proplen);
2252 2258 break;
2253 2259
2254 2260 case ZFS_PROP_NAME:
2255 2261 /*
2256 2262 * The 'name' property is a pseudo-property derived from the
2257 2263 * dataset name. It is presented as a real property to simplify
2258 2264 * consumers.
2259 2265 */
2260 2266 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2261 2267 break;
2262 2268
2263 2269 case ZFS_PROP_MLSLABEL:
2264 2270 {
2265 2271 m_label_t *new_sl = NULL;
2266 2272 char *ascii = NULL; /* human readable label */
2267 2273
2268 2274 (void) strlcpy(propbuf,
2269 2275 getprop_string(zhp, prop, &source), proplen);
2270 2276
2271 2277 if (literal || (strcasecmp(propbuf,
2272 2278 ZFS_MLSLABEL_DEFAULT) == 0))
2273 2279 break;
2274 2280
2275 2281 /*
2276 2282 * Try to translate the internal hex string to
2277 2283 * human-readable output. If there are any
2278 2284 * problems just use the hex string.
2279 2285 */
2280 2286
2281 2287 if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2282 2288 L_NO_CORRECTION, NULL) == -1) {
2283 2289 m_label_free(new_sl);
2284 2290 break;
2285 2291 }
2286 2292
2287 2293 if (label_to_str(new_sl, &ascii, M_LABEL,
2288 2294 DEF_NAMES) != 0) {
2289 2295 if (ascii)
2290 2296 free(ascii);
2291 2297 m_label_free(new_sl);
2292 2298 break;
2293 2299 }
2294 2300 m_label_free(new_sl);
2295 2301
2296 2302 (void) strlcpy(propbuf, ascii, proplen);
2297 2303 free(ascii);
2298 2304 }
2299 2305 break;
2300 2306
2301 2307 case ZFS_PROP_GUID:
2302 2308 /*
2303 2309 * GUIDs are stored as numbers, but they are identifiers.
2304 2310 * We don't want them to be pretty printed, because pretty
2305 2311 * printing mangles the ID into a truncated and useless value.
2306 2312 */
2307 2313 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2308 2314 return (-1);
2309 2315 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2310 2316 break;
2311 2317
2312 2318 default:
2313 2319 switch (zfs_prop_get_type(prop)) {
2314 2320 case PROP_TYPE_NUMBER:
2315 2321 if (get_numeric_property(zhp, prop, src,
2316 2322 &source, &val) != 0)
2317 2323 return (-1);
2318 2324 if (literal)
2319 2325 (void) snprintf(propbuf, proplen, "%llu",
2320 2326 (u_longlong_t)val);
2321 2327 else
2322 2328 zfs_nicenum(val, propbuf, proplen);
2323 2329 break;
2324 2330
2325 2331 case PROP_TYPE_STRING:
2326 2332 (void) strlcpy(propbuf,
2327 2333 getprop_string(zhp, prop, &source), proplen);
2328 2334 break;
2329 2335
2330 2336 case PROP_TYPE_INDEX:
2331 2337 if (get_numeric_property(zhp, prop, src,
2332 2338 &source, &val) != 0)
2333 2339 return (-1);
2334 2340 if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2335 2341 return (-1);
2336 2342 (void) strlcpy(propbuf, strval, proplen);
2337 2343 break;
2338 2344
2339 2345 default:
2340 2346 abort();
2341 2347 }
2342 2348 }
2343 2349
2344 2350 get_source(zhp, src, source, statbuf, statlen);
2345 2351
2346 2352 return (0);
2347 2353 }
2348 2354
2349 2355 /*
2350 2356 * Utility function to get the given numeric property. Does no validation that
2351 2357 * the given property is the appropriate type; should only be used with
2352 2358 * hard-coded property types.
2353 2359 */
2354 2360 uint64_t
2355 2361 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2356 2362 {
2357 2363 char *source;
2358 2364 uint64_t val;
2359 2365
2360 2366 (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2361 2367
2362 2368 return (val);
2363 2369 }
2364 2370
2365 2371 int
2366 2372 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2367 2373 {
2368 2374 char buf[64];
2369 2375
2370 2376 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2371 2377 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2372 2378 }
2373 2379
2374 2380 /*
2375 2381 * Similar to zfs_prop_get(), but returns the value as an integer.
2376 2382 */
2377 2383 int
2378 2384 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2379 2385 zprop_source_t *src, char *statbuf, size_t statlen)
2380 2386 {
2381 2387 char *source;
2382 2388
2383 2389 /*
2384 2390 * Check to see if this property applies to our object
2385 2391 */
2386 2392 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2387 2393 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2388 2394 dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2389 2395 zfs_prop_to_name(prop)));
2390 2396 }
2391 2397
2392 2398 if (src)
2393 2399 *src = ZPROP_SRC_NONE;
2394 2400
2395 2401 if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2396 2402 return (-1);
2397 2403
2398 2404 get_source(zhp, src, source, statbuf, statlen);
2399 2405
2400 2406 return (0);
2401 2407 }
2402 2408
2403 2409 static int
2404 2410 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2405 2411 char **domainp, idmap_rid_t *ridp)
2406 2412 {
2407 2413 idmap_get_handle_t *get_hdl = NULL;
2408 2414 idmap_stat status;
2409 2415 int err = EINVAL;
2410 2416
2411 2417 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2412 2418 goto out;
2413 2419
2414 2420 if (isuser) {
2415 2421 err = idmap_get_sidbyuid(get_hdl, id,
2416 2422 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2417 2423 } else {
2418 2424 err = idmap_get_sidbygid(get_hdl, id,
2419 2425 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2420 2426 }
2421 2427 if (err == IDMAP_SUCCESS &&
2422 2428 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2423 2429 status == IDMAP_SUCCESS)
2424 2430 err = 0;
2425 2431 else
2426 2432 err = EINVAL;
2427 2433 out:
2428 2434 if (get_hdl)
2429 2435 idmap_get_destroy(get_hdl);
2430 2436 return (err);
2431 2437 }
2432 2438
2433 2439 /*
2434 2440 * convert the propname into parameters needed by kernel
2435 2441 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2436 2442 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2437 2443 */
2438 2444 static int
2439 2445 userquota_propname_decode(const char *propname, boolean_t zoned,
2440 2446 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2441 2447 {
2442 2448 zfs_userquota_prop_t type;
2443 2449 char *cp, *end;
2444 2450 char *numericsid = NULL;
2445 2451 boolean_t isuser;
2446 2452
2447 2453 domain[0] = '\0';
2448 2454
2449 2455 /* Figure out the property type ({user|group}{quota|space}) */
2450 2456 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2451 2457 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2452 2458 strlen(zfs_userquota_prop_prefixes[type])) == 0)
2453 2459 break;
2454 2460 }
2455 2461 if (type == ZFS_NUM_USERQUOTA_PROPS)
2456 2462 return (EINVAL);
2457 2463 *typep = type;
2458 2464
2459 2465 isuser = (type == ZFS_PROP_USERQUOTA ||
2460 2466 type == ZFS_PROP_USERUSED);
2461 2467
2462 2468 cp = strchr(propname, '@') + 1;
2463 2469
2464 2470 if (strchr(cp, '@')) {
2465 2471 /*
2466 2472 * It's a SID name (eg "user@domain") that needs to be
2467 2473 * turned into S-1-domainID-RID.
2468 2474 */
2469 2475 directory_error_t e;
2470 2476 if (zoned && getzoneid() == GLOBAL_ZONEID)
2471 2477 return (ENOENT);
2472 2478 if (isuser) {
2473 2479 e = directory_sid_from_user_name(NULL,
2474 2480 cp, &numericsid);
2475 2481 } else {
2476 2482 e = directory_sid_from_group_name(NULL,
2477 2483 cp, &numericsid);
2478 2484 }
2479 2485 if (e != NULL) {
2480 2486 directory_error_free(e);
2481 2487 return (ENOENT);
2482 2488 }
2483 2489 if (numericsid == NULL)
2484 2490 return (ENOENT);
2485 2491 cp = numericsid;
2486 2492 /* will be further decoded below */
2487 2493 }
2488 2494
2489 2495 if (strncmp(cp, "S-1-", 4) == 0) {
2490 2496 /* It's a numeric SID (eg "S-1-234-567-89") */
2491 2497 (void) strlcpy(domain, cp, domainlen);
2492 2498 cp = strrchr(domain, '-');
2493 2499 *cp = '\0';
2494 2500 cp++;
2495 2501
2496 2502 errno = 0;
2497 2503 *ridp = strtoull(cp, &end, 10);
2498 2504 if (numericsid) {
2499 2505 free(numericsid);
2500 2506 numericsid = NULL;
2501 2507 }
2502 2508 if (errno != 0 || *end != '\0')
2503 2509 return (EINVAL);
2504 2510 } else if (!isdigit(*cp)) {
2505 2511 /*
2506 2512 * It's a user/group name (eg "user") that needs to be
2507 2513 * turned into a uid/gid
2508 2514 */
2509 2515 if (zoned && getzoneid() == GLOBAL_ZONEID)
2510 2516 return (ENOENT);
2511 2517 if (isuser) {
2512 2518 struct passwd *pw;
2513 2519 pw = getpwnam(cp);
2514 2520 if (pw == NULL)
2515 2521 return (ENOENT);
2516 2522 *ridp = pw->pw_uid;
2517 2523 } else {
2518 2524 struct group *gr;
2519 2525 gr = getgrnam(cp);
2520 2526 if (gr == NULL)
2521 2527 return (ENOENT);
2522 2528 *ridp = gr->gr_gid;
2523 2529 }
2524 2530 } else {
2525 2531 /* It's a user/group ID (eg "12345"). */
2526 2532 uid_t id = strtoul(cp, &end, 10);
2527 2533 idmap_rid_t rid;
2528 2534 char *mapdomain;
2529 2535
2530 2536 if (*end != '\0')
2531 2537 return (EINVAL);
2532 2538 if (id > MAXUID) {
2533 2539 /* It's an ephemeral ID. */
2534 2540 if (idmap_id_to_numeric_domain_rid(id, isuser,
2535 2541 &mapdomain, &rid) != 0)
2536 2542 return (ENOENT);
2537 2543 (void) strlcpy(domain, mapdomain, domainlen);
2538 2544 *ridp = rid;
2539 2545 } else {
2540 2546 *ridp = id;
2541 2547 }
2542 2548 }
2543 2549
2544 2550 ASSERT3P(numericsid, ==, NULL);
2545 2551 return (0);
2546 2552 }
2547 2553
2548 2554 static int
2549 2555 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2550 2556 uint64_t *propvalue, zfs_userquota_prop_t *typep)
2551 2557 {
2552 2558 int err;
2553 2559 zfs_cmd_t zc = { 0 };
2554 2560
2555 2561 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2556 2562
2557 2563 err = userquota_propname_decode(propname,
2558 2564 zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2559 2565 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2560 2566 zc.zc_objset_type = *typep;
2561 2567 if (err)
2562 2568 return (err);
2563 2569
2564 2570 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2565 2571 if (err)
2566 2572 return (err);
2567 2573
2568 2574 *propvalue = zc.zc_cookie;
2569 2575 return (0);
2570 2576 }
2571 2577
2572 2578 int
2573 2579 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2574 2580 uint64_t *propvalue)
2575 2581 {
2576 2582 zfs_userquota_prop_t type;
2577 2583
2578 2584 return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2579 2585 &type));
2580 2586 }
2581 2587
2582 2588 int
2583 2589 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2584 2590 char *propbuf, int proplen, boolean_t literal)
2585 2591 {
2586 2592 int err;
2587 2593 uint64_t propvalue;
2588 2594 zfs_userquota_prop_t type;
2589 2595
2590 2596 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2591 2597 &type);
2592 2598
2593 2599 if (err)
2594 2600 return (err);
2595 2601
2596 2602 if (literal) {
2597 2603 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2598 2604 } else if (propvalue == 0 &&
2599 2605 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2600 2606 (void) strlcpy(propbuf, "none", proplen);
2601 2607 } else {
2602 2608 zfs_nicenum(propvalue, propbuf, proplen);
2603 2609 }
2604 2610 return (0);
2605 2611 }
2606 2612
2607 2613 int
2608 2614 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2609 2615 uint64_t *propvalue)
2610 2616 {
2611 2617 int err;
2612 2618 zfs_cmd_t zc = { 0 };
2613 2619 const char *snapname;
2614 2620
2615 2621 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2616 2622
2617 2623 snapname = strchr(propname, '@') + 1;
2618 2624 if (strchr(snapname, '@')) {
2619 2625 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2620 2626 } else {
2621 2627 /* snapname is the short name, append it to zhp's fsname */
2622 2628 char *cp;
2623 2629
2624 2630 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2625 2631 sizeof (zc.zc_value));
2626 2632 cp = strchr(zc.zc_value, '@');
2627 2633 if (cp != NULL)
2628 2634 *cp = '\0';
2629 2635 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2630 2636 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2631 2637 }
2632 2638
2633 2639 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2634 2640 if (err)
2635 2641 return (err);
2636 2642
2637 2643 *propvalue = zc.zc_cookie;
2638 2644 return (0);
2639 2645 }
2640 2646
2641 2647 int
2642 2648 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2643 2649 char *propbuf, int proplen, boolean_t literal)
2644 2650 {
2645 2651 int err;
2646 2652 uint64_t propvalue;
2647 2653
2648 2654 err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2649 2655
2650 2656 if (err)
2651 2657 return (err);
2652 2658
2653 2659 if (literal) {
2654 2660 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2655 2661 } else {
2656 2662 zfs_nicenum(propvalue, propbuf, proplen);
2657 2663 }
2658 2664 return (0);
2659 2665 }
2660 2666
2661 2667 /*
2662 2668 * Returns the name of the given zfs handle.
2663 2669 */
2664 2670 const char *
2665 2671 zfs_get_name(const zfs_handle_t *zhp)
2666 2672 {
2667 2673 return (zhp->zfs_name);
2668 2674 }
2669 2675
2670 2676 /*
2671 2677 * Returns the type of the given zfs handle.
2672 2678 */
2673 2679 zfs_type_t
2674 2680 zfs_get_type(const zfs_handle_t *zhp)
2675 2681 {
2676 2682 return (zhp->zfs_type);
2677 2683 }
2678 2684
2679 2685 /*
2680 2686 * Is one dataset name a child dataset of another?
2681 2687 *
2682 2688 * Needs to handle these cases:
2683 2689 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo"
2684 2690 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar"
2685 2691 * Descendant? No. No. No. Yes.
2686 2692 */
2687 2693 static boolean_t
2688 2694 is_descendant(const char *ds1, const char *ds2)
2689 2695 {
2690 2696 size_t d1len = strlen(ds1);
2691 2697
2692 2698 /* ds2 can't be a descendant if it's smaller */
2693 2699 if (strlen(ds2) < d1len)
2694 2700 return (B_FALSE);
2695 2701
2696 2702 /* otherwise, compare strings and verify that there's a '/' char */
2697 2703 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2698 2704 }
2699 2705
2700 2706 /*
2701 2707 * Given a complete name, return just the portion that refers to the parent.
2702 2708 * Will return -1 if there is no parent (path is just the name of the
2703 2709 * pool).
2704 2710 */
2705 2711 static int
2706 2712 parent_name(const char *path, char *buf, size_t buflen)
2707 2713 {
2708 2714 char *slashp;
2709 2715
2710 2716 (void) strlcpy(buf, path, buflen);
2711 2717
2712 2718 if ((slashp = strrchr(buf, '/')) == NULL)
2713 2719 return (-1);
2714 2720 *slashp = '\0';
2715 2721
2716 2722 return (0);
2717 2723 }
2718 2724
2719 2725 /*
2720 2726 * If accept_ancestor is false, then check to make sure that the given path has
2721 2727 * a parent, and that it exists. If accept_ancestor is true, then find the
2722 2728 * closest existing ancestor for the given path. In prefixlen return the
2723 2729 * length of already existing prefix of the given path. We also fetch the
2724 2730 * 'zoned' property, which is used to validate property settings when creating
2725 2731 * new datasets.
2726 2732 */
2727 2733 static int
2728 2734 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
2729 2735 boolean_t accept_ancestor, int *prefixlen)
2730 2736 {
2731 2737 zfs_cmd_t zc = { 0 };
2732 2738 char parent[ZFS_MAXNAMELEN];
2733 2739 char *slash;
2734 2740 zfs_handle_t *zhp;
2735 2741 char errbuf[1024];
2736 2742 uint64_t is_zoned;
2737 2743
2738 2744 (void) snprintf(errbuf, sizeof (errbuf),
2739 2745 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
2740 2746
2741 2747 /* get parent, and check to see if this is just a pool */
2742 2748 if (parent_name(path, parent, sizeof (parent)) != 0) {
2743 2749 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2744 2750 "missing dataset name"));
2745 2751 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2746 2752 }
2747 2753
2748 2754 /* check to see if the pool exists */
2749 2755 if ((slash = strchr(parent, '/')) == NULL)
2750 2756 slash = parent + strlen(parent);
2751 2757 (void) strncpy(zc.zc_name, parent, slash - parent);
2752 2758 zc.zc_name[slash - parent] = '\0';
2753 2759 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
2754 2760 errno == ENOENT) {
2755 2761 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2756 2762 "no such pool '%s'"), zc.zc_name);
2757 2763 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2758 2764 }
2759 2765
2760 2766 /* check to see if the parent dataset exists */
2761 2767 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
2762 2768 if (errno == ENOENT && accept_ancestor) {
2763 2769 /*
2764 2770 * Go deeper to find an ancestor, give up on top level.
2765 2771 */
2766 2772 if (parent_name(parent, parent, sizeof (parent)) != 0) {
2767 2773 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2768 2774 "no such pool '%s'"), zc.zc_name);
2769 2775 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2770 2776 }
2771 2777 } else if (errno == ENOENT) {
2772 2778 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2773 2779 "parent does not exist"));
2774 2780 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2775 2781 } else
2776 2782 return (zfs_standard_error(hdl, errno, errbuf));
2777 2783 }
2778 2784
2779 2785 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2780 2786 if (zoned != NULL)
2781 2787 *zoned = is_zoned;
2782 2788
2783 2789 /* we are in a non-global zone, but parent is in the global zone */
2784 2790 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
2785 2791 (void) zfs_standard_error(hdl, EPERM, errbuf);
2786 2792 zfs_close(zhp);
2787 2793 return (-1);
2788 2794 }
2789 2795
2790 2796 /* make sure parent is a filesystem */
2791 2797 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
2792 2798 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2793 2799 "parent is not a filesystem"));
2794 2800 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
2795 2801 zfs_close(zhp);
2796 2802 return (-1);
2797 2803 }
2798 2804
2799 2805 zfs_close(zhp);
2800 2806 if (prefixlen != NULL)
2801 2807 *prefixlen = strlen(parent);
2802 2808 return (0);
2803 2809 }
2804 2810
2805 2811 /*
2806 2812 * Finds whether the dataset of the given type(s) exists.
2807 2813 */
2808 2814 boolean_t
2809 2815 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
2810 2816 {
2811 2817 zfs_handle_t *zhp;
2812 2818
2813 2819 if (!zfs_validate_name(hdl, path, types, B_FALSE))
2814 2820 return (B_FALSE);
2815 2821
2816 2822 /*
2817 2823 * Try to get stats for the dataset, which will tell us if it exists.
2818 2824 */
2819 2825 if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
2820 2826 int ds_type = zhp->zfs_type;
2821 2827
2822 2828 zfs_close(zhp);
2823 2829 if (types & ds_type)
2824 2830 return (B_TRUE);
2825 2831 }
2826 2832 return (B_FALSE);
2827 2833 }
2828 2834
2829 2835 /*
2830 2836 * Given a path to 'target', create all the ancestors between
2831 2837 * the prefixlen portion of the path, and the target itself.
2832 2838 * Fail if the initial prefixlen-ancestor does not already exist.
2833 2839 */
2834 2840 int
2835 2841 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
2836 2842 {
2837 2843 zfs_handle_t *h;
2838 2844 char *cp;
2839 2845 const char *opname;
2840 2846
2841 2847 /* make sure prefix exists */
2842 2848 cp = target + prefixlen;
2843 2849 if (*cp != '/') {
2844 2850 assert(strchr(cp, '/') == NULL);
2845 2851 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2846 2852 } else {
2847 2853 *cp = '\0';
2848 2854 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2849 2855 *cp = '/';
2850 2856 }
2851 2857 if (h == NULL)
2852 2858 return (-1);
2853 2859 zfs_close(h);
2854 2860
2855 2861 /*
2856 2862 * Attempt to create, mount, and share any ancestor filesystems,
2857 2863 * up to the prefixlen-long one.
2858 2864 */
2859 2865 for (cp = target + prefixlen + 1;
2860 2866 cp = strchr(cp, '/'); *cp = '/', cp++) {
2861 2867
2862 2868 *cp = '\0';
2863 2869
2864 2870 h = make_dataset_handle(hdl, target);
2865 2871 if (h) {
2866 2872 /* it already exists, nothing to do here */
2867 2873 zfs_close(h);
2868 2874 continue;
2869 2875 }
2870 2876
2871 2877 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
2872 2878 NULL) != 0) {
2873 2879 opname = dgettext(TEXT_DOMAIN, "create");
2874 2880 goto ancestorerr;
2875 2881 }
2876 2882
2877 2883 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2878 2884 if (h == NULL) {
2879 2885 opname = dgettext(TEXT_DOMAIN, "open");
2880 2886 goto ancestorerr;
2881 2887 }
2882 2888
2883 2889 if (zfs_mount(h, NULL, 0) != 0) {
2884 2890 opname = dgettext(TEXT_DOMAIN, "mount");
2885 2891 goto ancestorerr;
2886 2892 }
2887 2893
2888 2894 if (zfs_share(h) != 0) {
2889 2895 opname = dgettext(TEXT_DOMAIN, "share");
2890 2896 goto ancestorerr;
2891 2897 }
2892 2898
2893 2899 zfs_close(h);
2894 2900 }
2895 2901
2896 2902 return (0);
2897 2903
2898 2904 ancestorerr:
2899 2905 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2900 2906 "failed to %s ancestor '%s'"), opname, target);
2901 2907 return (-1);
2902 2908 }
2903 2909
2904 2910 /*
2905 2911 * Creates non-existing ancestors of the given path.
2906 2912 */
2907 2913 int
2908 2914 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
2909 2915 {
2910 2916 int prefix;
2911 2917 char *path_copy;
2912 2918 int rc;
2913 2919
2914 2920 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
2915 2921 return (-1);
2916 2922
2917 2923 if ((path_copy = strdup(path)) != NULL) {
2918 2924 rc = create_parents(hdl, path_copy, prefix);
2919 2925 free(path_copy);
2920 2926 }
2921 2927 if (path_copy == NULL || rc != 0)
2922 2928 return (-1);
2923 2929
2924 2930 return (0);
2925 2931 }
2926 2932
2927 2933 /*
2928 2934 * Create a new filesystem or volume.
2929 2935 */
2930 2936 int
2931 2937 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
2932 2938 nvlist_t *props)
2933 2939 {
2934 2940 int ret;
2935 2941 uint64_t size = 0;
2936 2942 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
2937 2943 char errbuf[1024];
2938 2944 uint64_t zoned;
2939 2945 dmu_objset_type_t ost;
2940 2946
2941 2947 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2942 2948 "cannot create '%s'"), path);
2943 2949
2944 2950 /* validate the path, taking care to note the extended error message */
2945 2951 if (!zfs_validate_name(hdl, path, type, B_TRUE))
2946 2952 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2947 2953
2948 2954 /* validate parents exist */
2949 2955 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
2950 2956 return (-1);
2951 2957
2952 2958 /*
2953 2959 * The failure modes when creating a dataset of a different type over
2954 2960 * one that already exists is a little strange. In particular, if you
2955 2961 * try to create a dataset on top of an existing dataset, the ioctl()
2956 2962 * will return ENOENT, not EEXIST. To prevent this from happening, we
2957 2963 * first try to see if the dataset exists.
2958 2964 */
2959 2965 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
2960 2966 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2961 2967 "dataset already exists"));
2962 2968 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
2963 2969 }
2964 2970
2965 2971 if (type == ZFS_TYPE_VOLUME)
2966 2972 ost = DMU_OST_ZVOL;
2967 2973 else
2968 2974 ost = DMU_OST_ZFS;
2969 2975
2970 2976 if (props && (props = zfs_valid_proplist(hdl, type, props,
2971 2977 zoned, NULL, errbuf)) == 0)
2972 2978 return (-1);
2973 2979
2974 2980 if (type == ZFS_TYPE_VOLUME) {
2975 2981 /*
2976 2982 * If we are creating a volume, the size and block size must
2977 2983 * satisfy a few restraints. First, the blocksize must be a
2978 2984 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the
2979 2985 * volsize must be a multiple of the block size, and cannot be
2980 2986 * zero.
2981 2987 */
2982 2988 if (props == NULL || nvlist_lookup_uint64(props,
2983 2989 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
2984 2990 nvlist_free(props);
2985 2991 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2986 2992 "missing volume size"));
2987 2993 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2988 2994 }
2989 2995
2990 2996 if ((ret = nvlist_lookup_uint64(props,
2991 2997 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
2992 2998 &blocksize)) != 0) {
2993 2999 if (ret == ENOENT) {
2994 3000 blocksize = zfs_prop_default_numeric(
2995 3001 ZFS_PROP_VOLBLOCKSIZE);
2996 3002 } else {
2997 3003 nvlist_free(props);
2998 3004 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2999 3005 "missing volume block size"));
3000 3006 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3001 3007 }
3002 3008 }
3003 3009
3004 3010 if (size == 0) {
3005 3011 nvlist_free(props);
3006 3012 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3007 3013 "volume size cannot be zero"));
3008 3014 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3009 3015 }
3010 3016
3011 3017 if (size % blocksize != 0) {
3012 3018 nvlist_free(props);
3013 3019 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3014 3020 "volume size must be a multiple of volume block "
3015 3021 "size"));
3016 3022 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3017 3023 }
3018 3024 }
3019 3025
3020 3026 /* create the dataset */
3021 3027 ret = lzc_create(path, ost, props);
3022 3028 nvlist_free(props);
3023 3029
3024 3030 /* check for failure */
3025 3031 if (ret != 0) {
3026 3032 char parent[ZFS_MAXNAMELEN];
3027 3033 (void) parent_name(path, parent, sizeof (parent));
3028 3034
3029 3035 switch (errno) {
3030 3036 case ENOENT:
3031 3037 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3032 3038 "no such parent '%s'"), parent);
3033 3039 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3034 3040
3035 3041 case EINVAL:
3036 3042 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3037 3043 "parent '%s' is not a filesystem"), parent);
3038 3044 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3039 3045
3040 3046 case EDOM:
3041 3047 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3042 3048 "volume block size must be power of 2 from "
3043 3049 "%u to %uk"),
3044 3050 (uint_t)SPA_MINBLOCKSIZE,
3045 3051 (uint_t)SPA_MAXBLOCKSIZE >> 10);
3046 3052
3047 3053 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3048 3054
3049 3055 case ENOTSUP:
3050 3056 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3051 3057 "pool must be upgraded to set this "
3052 3058 "property or value"));
3053 3059 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3054 3060 #ifdef _ILP32
3055 3061 case EOVERFLOW:
3056 3062 /*
3057 3063 * This platform can't address a volume this big.
3058 3064 */
3059 3065 if (type == ZFS_TYPE_VOLUME)
3060 3066 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3061 3067 errbuf));
3062 3068 #endif
3063 3069 /* FALLTHROUGH */
3064 3070 default:
3065 3071 return (zfs_standard_error(hdl, errno, errbuf));
3066 3072 }
3067 3073 }
3068 3074
3069 3075 return (0);
3070 3076 }
3071 3077
3072 3078 /*
3073 3079 * Destroys the given dataset. The caller must make sure that the filesystem
3074 3080 * isn't mounted, and that there are no active dependents. If the file system
3075 3081 * does not exist this function does nothing.
3076 3082 */
3077 3083 int
3078 3084 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3079 3085 {
3080 3086 zfs_cmd_t zc = { 0 };
3081 3087
3082 3088 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3083 3089
3084 3090 if (ZFS_IS_VOLUME(zhp)) {
3085 3091 zc.zc_objset_type = DMU_OST_ZVOL;
3086 3092 } else {
3087 3093 zc.zc_objset_type = DMU_OST_ZFS;
3088 3094 }
3089 3095
3090 3096 zc.zc_defer_destroy = defer;
3091 3097 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3092 3098 errno != ENOENT) {
3093 3099 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3094 3100 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3095 3101 zhp->zfs_name));
3096 3102 }
3097 3103
3098 3104 remove_mountpoint(zhp);
3099 3105
3100 3106 return (0);
3101 3107 }
3102 3108
3103 3109 struct destroydata {
3104 3110 nvlist_t *nvl;
3105 3111 const char *snapname;
3106 3112 };
3107 3113
3108 3114 static int
3109 3115 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3110 3116 {
3111 3117 struct destroydata *dd = arg;
3112 3118 char name[ZFS_MAXNAMELEN];
3113 3119 int rv = 0;
3114 3120
3115 3121 (void) snprintf(name, sizeof (name),
3116 3122 "%s@%s", zhp->zfs_name, dd->snapname);
3117 3123
3118 3124 if (lzc_exists(name))
3119 3125 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3120 3126
3121 3127 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3122 3128 zfs_close(zhp);
3123 3129 return (rv);
3124 3130 }
3125 3131
3126 3132 /*
3127 3133 * Destroys all snapshots with the given name in zhp & descendants.
3128 3134 */
3129 3135 int
3130 3136 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3131 3137 {
3132 3138 int ret;
3133 3139 struct destroydata dd = { 0 };
3134 3140
3135 3141 dd.snapname = snapname;
3136 3142 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3137 3143 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3138 3144
3139 3145 if (nvlist_empty(dd.nvl)) {
3140 3146 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3141 3147 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3142 3148 zhp->zfs_name, snapname);
3143 3149 } else {
3144 3150 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3145 3151 }
3146 3152 nvlist_free(dd.nvl);
3147 3153 return (ret);
3148 3154 }
3149 3155
3150 3156 /*
3151 3157 * Destroys all the snapshots named in the nvlist.
3152 3158 */
3153 3159 int
3154 3160 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3155 3161 {
3156 3162 int ret;
3157 3163 nvlist_t *errlist;
3158 3164
3159 3165 ret = lzc_destroy_snaps(snaps, defer, &errlist);
3160 3166
3161 3167 if (ret == 0)
3162 3168 return (0);
3163 3169
3164 3170 if (nvlist_empty(errlist)) {
3165 3171 char errbuf[1024];
3166 3172 (void) snprintf(errbuf, sizeof (errbuf),
3167 3173 dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3168 3174
3169 3175 ret = zfs_standard_error(hdl, ret, errbuf);
3170 3176 }
3171 3177 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3172 3178 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3173 3179 char errbuf[1024];
3174 3180 (void) snprintf(errbuf, sizeof (errbuf),
3175 3181 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3176 3182 nvpair_name(pair));
3177 3183
3178 3184 switch (fnvpair_value_int32(pair)) {
3179 3185 case EEXIST:
3180 3186 zfs_error_aux(hdl,
3181 3187 dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3182 3188 ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3183 3189 break;
3184 3190 default:
3185 3191 ret = zfs_standard_error(hdl, errno, errbuf);
3186 3192 break;
3187 3193 }
3188 3194 }
3189 3195
3190 3196 return (ret);
3191 3197 }
3192 3198
3193 3199 /*
3194 3200 * Clones the given dataset. The target must be of the same type as the source.
3195 3201 */
3196 3202 int
3197 3203 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3198 3204 {
3199 3205 char parent[ZFS_MAXNAMELEN];
3200 3206 int ret;
3201 3207 char errbuf[1024];
3202 3208 libzfs_handle_t *hdl = zhp->zfs_hdl;
3203 3209 uint64_t zoned;
3204 3210
3205 3211 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3206 3212
3207 3213 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3208 3214 "cannot create '%s'"), target);
3209 3215
3210 3216 /* validate the target/clone name */
3211 3217 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3212 3218 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3213 3219
3214 3220 /* validate parents exist */
3215 3221 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3216 3222 return (-1);
3217 3223
3218 3224 (void) parent_name(target, parent, sizeof (parent));
3219 3225
3220 3226 /* do the clone */
3221 3227
3222 3228 if (props) {
3223 3229 zfs_type_t type;
3224 3230 if (ZFS_IS_VOLUME(zhp)) {
3225 3231 type = ZFS_TYPE_VOLUME;
3226 3232 } else {
3227 3233 type = ZFS_TYPE_FILESYSTEM;
3228 3234 }
3229 3235 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3230 3236 zhp, errbuf)) == NULL)
3231 3237 return (-1);
3232 3238 }
3233 3239
3234 3240 ret = lzc_clone(target, zhp->zfs_name, props);
3235 3241 nvlist_free(props);
3236 3242
3237 3243 if (ret != 0) {
3238 3244 switch (errno) {
3239 3245
3240 3246 case ENOENT:
3241 3247 /*
3242 3248 * The parent doesn't exist. We should have caught this
3243 3249 * above, but there may a race condition that has since
3244 3250 * destroyed the parent.
3245 3251 *
3246 3252 * At this point, we don't know whether it's the source
3247 3253 * that doesn't exist anymore, or whether the target
3248 3254 * dataset doesn't exist.
3249 3255 */
3250 3256 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3251 3257 "no such parent '%s'"), parent);
3252 3258 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3253 3259
3254 3260 case EXDEV:
3255 3261 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3256 3262 "source and target pools differ"));
3257 3263 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3258 3264 errbuf));
3259 3265
3260 3266 default:
3261 3267 return (zfs_standard_error(zhp->zfs_hdl, errno,
3262 3268 errbuf));
3263 3269 }
3264 3270 }
3265 3271
3266 3272 return (ret);
3267 3273 }
3268 3274
3269 3275 /*
3270 3276 * Promotes the given clone fs to be the clone parent.
3271 3277 */
3272 3278 int
3273 3279 zfs_promote(zfs_handle_t *zhp)
3274 3280 {
3275 3281 libzfs_handle_t *hdl = zhp->zfs_hdl;
3276 3282 zfs_cmd_t zc = { 0 };
3277 3283 char parent[MAXPATHLEN];
3278 3284 int ret;
3279 3285 char errbuf[1024];
3280 3286
3281 3287 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3282 3288 "cannot promote '%s'"), zhp->zfs_name);
3283 3289
3284 3290 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3285 3291 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3286 3292 "snapshots can not be promoted"));
3287 3293 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3288 3294 }
3289 3295
3290 3296 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3291 3297 if (parent[0] == '\0') {
3292 3298 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3293 3299 "not a cloned filesystem"));
3294 3300 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3295 3301 }
3296 3302
3297 3303 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3298 3304 sizeof (zc.zc_value));
3299 3305 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3300 3306 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3301 3307
3302 3308 if (ret != 0) {
3303 3309 int save_errno = errno;
3304 3310
3305 3311 switch (save_errno) {
3306 3312 case EEXIST:
3307 3313 /* There is a conflicting snapshot name. */
3308 3314 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3309 3315 "conflicting snapshot '%s' from parent '%s'"),
3310 3316 zc.zc_string, parent);
3311 3317 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3312 3318
3313 3319 default:
3314 3320 return (zfs_standard_error(hdl, save_errno, errbuf));
3315 3321 }
3316 3322 }
3317 3323 return (ret);
3318 3324 }
3319 3325
3320 3326 typedef struct snapdata {
3321 3327 nvlist_t *sd_nvl;
3322 3328 const char *sd_snapname;
3323 3329 } snapdata_t;
3324 3330
3325 3331 static int
3326 3332 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3327 3333 {
3328 3334 snapdata_t *sd = arg;
3329 3335 char name[ZFS_MAXNAMELEN];
3330 3336 int rv = 0;
3331 3337
3332 3338 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3333 3339 (void) snprintf(name, sizeof (name),
3334 3340 "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3335 3341
3336 3342 fnvlist_add_boolean(sd->sd_nvl, name);
3337 3343
3338 3344 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3339 3345 }
3340 3346 zfs_close(zhp);
3341 3347
3342 3348 return (rv);
3343 3349 }
3344 3350
3345 3351 /*
3346 3352 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be
3347 3353 * created.
3348 3354 */
3349 3355 int
3350 3356 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3351 3357 {
3352 3358 int ret;
3353 3359 char errbuf[1024];
3354 3360 nvpair_t *elem;
3355 3361 nvlist_t *errors;
3356 3362
3357 3363 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3358 3364 "cannot create snapshots "));
3359 3365
3360 3366 elem = NULL;
3361 3367 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3362 3368 const char *snapname = nvpair_name(elem);
3363 3369
3364 3370 /* validate the target name */
3365 3371 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3366 3372 B_TRUE)) {
3367 3373 (void) snprintf(errbuf, sizeof (errbuf),
3368 3374 dgettext(TEXT_DOMAIN,
3369 3375 "cannot create snapshot '%s'"), snapname);
3370 3376 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3371 3377 }
3372 3378 }
3373 3379
3374 3380 if (props != NULL &&
3375 3381 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3376 3382 props, B_FALSE, NULL, errbuf)) == NULL) {
3377 3383 return (-1);
3378 3384 }
3379 3385
3380 3386 ret = lzc_snapshot(snaps, props, &errors);
3381 3387
3382 3388 if (ret != 0) {
3383 3389 boolean_t printed = B_FALSE;
3384 3390 for (elem = nvlist_next_nvpair(errors, NULL);
3385 3391 elem != NULL;
3386 3392 elem = nvlist_next_nvpair(errors, elem)) {
3387 3393 (void) snprintf(errbuf, sizeof (errbuf),
3388 3394 dgettext(TEXT_DOMAIN,
3389 3395 "cannot create snapshot '%s'"), nvpair_name(elem));
3390 3396 (void) zfs_standard_error(hdl,
3391 3397 fnvpair_value_int32(elem), errbuf);
3392 3398 printed = B_TRUE;
3393 3399 }
3394 3400 if (!printed) {
3395 3401 switch (ret) {
3396 3402 case EXDEV:
3397 3403 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3398 3404 "multiple snapshots of same "
3399 3405 "fs not allowed"));
3400 3406 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3401 3407
3402 3408 break;
3403 3409 default:
3404 3410 (void) zfs_standard_error(hdl, ret, errbuf);
3405 3411 }
3406 3412 }
3407 3413 }
3408 3414
3409 3415 nvlist_free(props);
3410 3416 nvlist_free(errors);
3411 3417 return (ret);
3412 3418 }
3413 3419
3414 3420 int
3415 3421 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3416 3422 nvlist_t *props)
3417 3423 {
3418 3424 int ret;
3419 3425 snapdata_t sd = { 0 };
3420 3426 char fsname[ZFS_MAXNAMELEN];
3421 3427 char *cp;
3422 3428 zfs_handle_t *zhp;
3423 3429 char errbuf[1024];
3424 3430
3425 3431 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3426 3432 "cannot snapshot %s"), path);
3427 3433
3428 3434 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3429 3435 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3430 3436
3431 3437 (void) strlcpy(fsname, path, sizeof (fsname));
3432 3438 cp = strchr(fsname, '@');
3433 3439 *cp = '\0';
3434 3440 sd.sd_snapname = cp + 1;
3435 3441
3436 3442 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3437 3443 ZFS_TYPE_VOLUME)) == NULL) {
3438 3444 return (-1);
3439 3445 }
3440 3446
3441 3447 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3442 3448 if (recursive) {
3443 3449 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3444 3450 } else {
3445 3451 fnvlist_add_boolean(sd.sd_nvl, path);
3446 3452 }
3447 3453
3448 3454 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3449 3455 nvlist_free(sd.sd_nvl);
3450 3456 zfs_close(zhp);
3451 3457 return (ret);
3452 3458 }
3453 3459
3454 3460 /*
3455 3461 * Destroy any more recent snapshots. We invoke this callback on any dependents
3456 3462 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this
3457 3463 * is a dependent and we should just destroy it without checking the transaction
3458 3464 * group.
3459 3465 */
3460 3466 typedef struct rollback_data {
3461 3467 const char *cb_target; /* the snapshot */
3462 3468 uint64_t cb_create; /* creation time reference */
3463 3469 boolean_t cb_error;
3464 3470 boolean_t cb_dependent;
3465 3471 boolean_t cb_force;
3466 3472 } rollback_data_t;
3467 3473
3468 3474 static int
3469 3475 rollback_destroy(zfs_handle_t *zhp, void *data)
3470 3476 {
3471 3477 rollback_data_t *cbp = data;
3472 3478
3473 3479 if (!cbp->cb_dependent) {
3474 3480 if (strcmp(zhp->zfs_name, cbp->cb_target) != 0 &&
3475 3481 zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3476 3482 zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3477 3483 cbp->cb_create) {
3478 3484
3479 3485 cbp->cb_dependent = B_TRUE;
3480 3486 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3481 3487 rollback_destroy, cbp);
3482 3488 cbp->cb_dependent = B_FALSE;
3483 3489
3484 3490 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3485 3491 }
3486 3492 } else {
3487 3493 /* We must destroy this clone; first unmount it */
3488 3494 prop_changelist_t *clp;
3489 3495
3490 3496 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3491 3497 cbp->cb_force ? MS_FORCE: 0);
3492 3498 if (clp == NULL || changelist_prefix(clp) != 0) {
3493 3499 cbp->cb_error = B_TRUE;
3494 3500 zfs_close(zhp);
3495 3501 return (0);
3496 3502 }
3497 3503 if (zfs_destroy(zhp, B_FALSE) != 0)
3498 3504 cbp->cb_error = B_TRUE;
3499 3505 else
3500 3506 changelist_remove(clp, zhp->zfs_name);
3501 3507 (void) changelist_postfix(clp);
3502 3508 changelist_free(clp);
3503 3509 }
3504 3510
3505 3511 zfs_close(zhp);
3506 3512 return (0);
3507 3513 }
3508 3514
3509 3515 /*
3510 3516 * Given a dataset, rollback to a specific snapshot, discarding any
3511 3517 * data changes since then and making it the active dataset.
3512 3518 *
3513 3519 * Any snapshots more recent than the target are destroyed, along with
3514 3520 * their dependents.
3515 3521 */
3516 3522 int
3517 3523 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3518 3524 {
3519 3525 rollback_data_t cb = { 0 };
3520 3526 int err;
3521 3527 boolean_t restore_resv = 0;
3522 3528 uint64_t old_volsize, new_volsize;
3523 3529 zfs_prop_t resv_prop;
3524 3530
3525 3531 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3526 3532 zhp->zfs_type == ZFS_TYPE_VOLUME);
3527 3533
3528 3534 /*
3529 3535 * Destroy all recent snapshots and their dependents.
3530 3536 */
3531 3537 cb.cb_force = force;
3532 3538 cb.cb_target = snap->zfs_name;
3533 3539 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3534 3540 (void) zfs_iter_children(zhp, rollback_destroy, &cb);
3535 3541
3536 3542 if (cb.cb_error)
3537 3543 return (-1);
3538 3544
3539 3545 /*
3540 3546 * Now that we have verified that the snapshot is the latest,
3541 3547 * rollback to the given snapshot.
3542 3548 */
3543 3549
3544 3550 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3545 3551 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3546 3552 return (-1);
3547 3553 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3548 3554 restore_resv =
3549 3555 (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3550 3556 }
3551 3557
3552 3558 /*
3553 3559 * We rely on zfs_iter_children() to verify that there are no
3554 3560 * newer snapshots for the given dataset. Therefore, we can
3555 3561 * simply pass the name on to the ioctl() call. There is still
3556 3562 * an unlikely race condition where the user has taken a
3557 3563 * snapshot since we verified that this was the most recent.
3558 3564 */
3559 3565 err = lzc_rollback(zhp->zfs_name, NULL, 0);
3560 3566 if (err != 0) {
3561 3567 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3562 3568 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3563 3569 zhp->zfs_name);
3564 3570 return (err);
3565 3571 }
3566 3572
3567 3573 /*
3568 3574 * For volumes, if the pre-rollback volsize matched the pre-
3569 3575 * rollback reservation and the volsize has changed then set
3570 3576 * the reservation property to the post-rollback volsize.
3571 3577 * Make a new handle since the rollback closed the dataset.
3572 3578 */
3573 3579 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3574 3580 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3575 3581 if (restore_resv) {
3576 3582 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3577 3583 if (old_volsize != new_volsize)
3578 3584 err = zfs_prop_set_int(zhp, resv_prop,
3579 3585 new_volsize);
3580 3586 }
3581 3587 zfs_close(zhp);
3582 3588 }
3583 3589 return (err);
3584 3590 }
3585 3591
3586 3592 /*
3587 3593 * Renames the given dataset.
3588 3594 */
3589 3595 int
3590 3596 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
3591 3597 boolean_t force_unmount)
3592 3598 {
3593 3599 int ret;
3594 3600 zfs_cmd_t zc = { 0 };
3595 3601 char *delim;
3596 3602 prop_changelist_t *cl = NULL;
3597 3603 zfs_handle_t *zhrp = NULL;
3598 3604 char *parentname = NULL;
3599 3605 char parent[ZFS_MAXNAMELEN];
3600 3606 libzfs_handle_t *hdl = zhp->zfs_hdl;
3601 3607 char errbuf[1024];
3602 3608
3603 3609 /* if we have the same exact name, just return success */
3604 3610 if (strcmp(zhp->zfs_name, target) == 0)
3605 3611 return (0);
3606 3612
3607 3613 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3608 3614 "cannot rename to '%s'"), target);
3609 3615
3610 3616 /*
3611 3617 * Make sure the target name is valid
3612 3618 */
3613 3619 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3614 3620 if ((strchr(target, '@') == NULL) ||
3615 3621 *target == '@') {
3616 3622 /*
3617 3623 * Snapshot target name is abbreviated,
3618 3624 * reconstruct full dataset name
3619 3625 */
3620 3626 (void) strlcpy(parent, zhp->zfs_name,
3621 3627 sizeof (parent));
3622 3628 delim = strchr(parent, '@');
3623 3629 if (strchr(target, '@') == NULL)
3624 3630 *(++delim) = '\0';
3625 3631 else
3626 3632 *delim = '\0';
3627 3633 (void) strlcat(parent, target, sizeof (parent));
3628 3634 target = parent;
3629 3635 } else {
3630 3636 /*
3631 3637 * Make sure we're renaming within the same dataset.
3632 3638 */
3633 3639 delim = strchr(target, '@');
3634 3640 if (strncmp(zhp->zfs_name, target, delim - target)
3635 3641 != 0 || zhp->zfs_name[delim - target] != '@') {
3636 3642 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3637 3643 "snapshots must be part of same "
3638 3644 "dataset"));
3639 3645 return (zfs_error(hdl, EZFS_CROSSTARGET,
3640 3646 errbuf));
3641 3647 }
3642 3648 }
3643 3649 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3644 3650 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3645 3651 } else {
3646 3652 if (recursive) {
3647 3653 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3648 3654 "recursive rename must be a snapshot"));
3649 3655 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3650 3656 }
3651 3657
3652 3658 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3653 3659 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3654 3660
3655 3661 /* validate parents */
3656 3662 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3657 3663 return (-1);
3658 3664
3659 3665 /* make sure we're in the same pool */
3660 3666 verify((delim = strchr(target, '/')) != NULL);
3661 3667 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3662 3668 zhp->zfs_name[delim - target] != '/') {
3663 3669 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3664 3670 "datasets must be within same pool"));
3665 3671 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3666 3672 }
3667 3673
3668 3674 /* new name cannot be a child of the current dataset name */
3669 3675 if (is_descendant(zhp->zfs_name, target)) {
3670 3676 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3671 3677 "New dataset name cannot be a descendant of "
3672 3678 "current dataset name"));
3673 3679 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3674 3680 }
3675 3681 }
3676 3682
3677 3683 (void) snprintf(errbuf, sizeof (errbuf),
3678 3684 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3679 3685
3680 3686 if (getzoneid() == GLOBAL_ZONEID &&
3681 3687 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3682 3688 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3683 3689 "dataset is used in a non-global zone"));
3684 3690 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3685 3691 }
3686 3692
3687 3693 if (recursive) {
3688 3694
3689 3695 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3690 3696 if (parentname == NULL) {
3691 3697 ret = -1;
3692 3698 goto error;
3693 3699 }
3694 3700 delim = strchr(parentname, '@');
3695 3701 *delim = '\0';
3696 3702 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
3697 3703 if (zhrp == NULL) {
3698 3704 ret = -1;
3699 3705 goto error;
3700 3706 }
3701 3707
3702 3708 } else {
3703 3709 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3704 3710 force_unmount ? MS_FORCE : 0)) == NULL)
3705 3711 return (-1);
3706 3712
3707 3713 if (changelist_haszonedchild(cl)) {
3708 3714 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3709 3715 "child dataset with inherited mountpoint is used "
3710 3716 "in a non-global zone"));
3711 3717 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
3712 3718 goto error;
3713 3719 }
3714 3720
3715 3721 if ((ret = changelist_prefix(cl)) != 0)
3716 3722 goto error;
3717 3723 }
3718 3724
3719 3725 if (ZFS_IS_VOLUME(zhp))
3720 3726 zc.zc_objset_type = DMU_OST_ZVOL;
3721 3727 else
3722 3728 zc.zc_objset_type = DMU_OST_ZFS;
3723 3729
3724 3730 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3725 3731 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
3726 3732
3727 3733 zc.zc_cookie = recursive;
3728 3734
3729 3735 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
3730 3736 /*
3731 3737 * if it was recursive, the one that actually failed will
3732 3738 * be in zc.zc_name
3733 3739 */
3734 3740 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3735 3741 "cannot rename '%s'"), zc.zc_name);
3736 3742
3737 3743 if (recursive && errno == EEXIST) {
3738 3744 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3739 3745 "a child dataset already has a snapshot "
3740 3746 "with the new name"));
3741 3747 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3742 3748 } else {
3743 3749 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
3744 3750 }
3745 3751
3746 3752 /*
3747 3753 * On failure, we still want to remount any filesystems that
3748 3754 * were previously mounted, so we don't alter the system state.
3749 3755 */
3750 3756 if (!recursive)
3751 3757 (void) changelist_postfix(cl);
3752 3758 } else {
3753 3759 if (!recursive) {
3754 3760 changelist_rename(cl, zfs_get_name(zhp), target);
3755 3761 ret = changelist_postfix(cl);
3756 3762 }
3757 3763 }
3758 3764
3759 3765 error:
3760 3766 if (parentname) {
3761 3767 free(parentname);
3762 3768 }
3763 3769 if (zhrp) {
3764 3770 zfs_close(zhrp);
3765 3771 }
3766 3772 if (cl) {
3767 3773 changelist_free(cl);
3768 3774 }
3769 3775 return (ret);
3770 3776 }
3771 3777
3772 3778 nvlist_t *
3773 3779 zfs_get_user_props(zfs_handle_t *zhp)
3774 3780 {
3775 3781 return (zhp->zfs_user_props);
3776 3782 }
3777 3783
3778 3784 nvlist_t *
3779 3785 zfs_get_recvd_props(zfs_handle_t *zhp)
3780 3786 {
3781 3787 if (zhp->zfs_recvd_props == NULL)
3782 3788 if (get_recvd_props_ioctl(zhp) != 0)
3783 3789 return (NULL);
3784 3790 return (zhp->zfs_recvd_props);
3785 3791 }
3786 3792
3787 3793 /*
3788 3794 * This function is used by 'zfs list' to determine the exact set of columns to
3789 3795 * display, and their maximum widths. This does two main things:
3790 3796 *
3791 3797 * - If this is a list of all properties, then expand the list to include
3792 3798 * all native properties, and set a flag so that for each dataset we look
3793 3799 * for new unique user properties and add them to the list.
3794 3800 *
3795 3801 * - For non fixed-width properties, keep track of the maximum width seen
3796 3802 * so that we can size the column appropriately. If the user has
3797 3803 * requested received property values, we also need to compute the width
3798 3804 * of the RECEIVED column.
3799 3805 */
3800 3806 int
3801 3807 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received)
3802 3808 {
3803 3809 libzfs_handle_t *hdl = zhp->zfs_hdl;
3804 3810 zprop_list_t *entry;
3805 3811 zprop_list_t **last, **start;
3806 3812 nvlist_t *userprops, *propval;
3807 3813 nvpair_t *elem;
3808 3814 char *strval;
3809 3815 char buf[ZFS_MAXPROPLEN];
3810 3816
3811 3817 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
3812 3818 return (-1);
3813 3819
3814 3820 userprops = zfs_get_user_props(zhp);
3815 3821
3816 3822 entry = *plp;
3817 3823 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
3818 3824 /*
3819 3825 * Go through and add any user properties as necessary. We
3820 3826 * start by incrementing our list pointer to the first
3821 3827 * non-native property.
3822 3828 */
3823 3829 start = plp;
3824 3830 while (*start != NULL) {
3825 3831 if ((*start)->pl_prop == ZPROP_INVAL)
3826 3832 break;
3827 3833 start = &(*start)->pl_next;
3828 3834 }
3829 3835
3830 3836 elem = NULL;
3831 3837 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
3832 3838 /*
3833 3839 * See if we've already found this property in our list.
3834 3840 */
3835 3841 for (last = start; *last != NULL;
3836 3842 last = &(*last)->pl_next) {
3837 3843 if (strcmp((*last)->pl_user_prop,
3838 3844 nvpair_name(elem)) == 0)
3839 3845 break;
3840 3846 }
3841 3847
3842 3848 if (*last == NULL) {
3843 3849 if ((entry = zfs_alloc(hdl,
3844 3850 sizeof (zprop_list_t))) == NULL ||
3845 3851 ((entry->pl_user_prop = zfs_strdup(hdl,
3846 3852 nvpair_name(elem)))) == NULL) {
3847 3853 free(entry);
3848 3854 return (-1);
3849 3855 }
3850 3856
3851 3857 entry->pl_prop = ZPROP_INVAL;
3852 3858 entry->pl_width = strlen(nvpair_name(elem));
3853 3859 entry->pl_all = B_TRUE;
3854 3860 *last = entry;
3855 3861 }
3856 3862 }
3857 3863 }
3858 3864
3859 3865 /*
3860 3866 * Now go through and check the width of any non-fixed columns
3861 3867 */
3862 3868 for (entry = *plp; entry != NULL; entry = entry->pl_next) {
3863 3869 if (entry->pl_fixed)
3864 3870 continue;
3865 3871
3866 3872 if (entry->pl_prop != ZPROP_INVAL) {
3867 3873 if (zfs_prop_get(zhp, entry->pl_prop,
3868 3874 buf, sizeof (buf), NULL, NULL, 0, B_FALSE) == 0) {
3869 3875 if (strlen(buf) > entry->pl_width)
3870 3876 entry->pl_width = strlen(buf);
3871 3877 }
3872 3878 if (received && zfs_prop_get_recvd(zhp,
3873 3879 zfs_prop_to_name(entry->pl_prop),
3874 3880 buf, sizeof (buf), B_FALSE) == 0)
3875 3881 if (strlen(buf) > entry->pl_recvd_width)
3876 3882 entry->pl_recvd_width = strlen(buf);
3877 3883 } else {
3878 3884 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
3879 3885 &propval) == 0) {
3880 3886 verify(nvlist_lookup_string(propval,
3881 3887 ZPROP_VALUE, &strval) == 0);
3882 3888 if (strlen(strval) > entry->pl_width)
3883 3889 entry->pl_width = strlen(strval);
3884 3890 }
3885 3891 if (received && zfs_prop_get_recvd(zhp,
3886 3892 entry->pl_user_prop,
3887 3893 buf, sizeof (buf), B_FALSE) == 0)
3888 3894 if (strlen(buf) > entry->pl_recvd_width)
3889 3895 entry->pl_recvd_width = strlen(buf);
3890 3896 }
3891 3897 }
3892 3898
3893 3899 return (0);
3894 3900 }
3895 3901
3896 3902 int
3897 3903 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
3898 3904 char *resource, void *export, void *sharetab,
3899 3905 int sharemax, zfs_share_op_t operation)
3900 3906 {
3901 3907 zfs_cmd_t zc = { 0 };
3902 3908 int error;
3903 3909
3904 3910 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3905 3911 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
3906 3912 if (resource)
3907 3913 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
3908 3914 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
3909 3915 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
3910 3916 zc.zc_share.z_sharetype = operation;
3911 3917 zc.zc_share.z_sharemax = sharemax;
3912 3918 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
3913 3919 return (error);
3914 3920 }
3915 3921
3916 3922 void
3917 3923 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
3918 3924 {
3919 3925 nvpair_t *curr;
3920 3926
3921 3927 /*
3922 3928 * Keep a reference to the props-table against which we prune the
3923 3929 * properties.
3924 3930 */
3925 3931 zhp->zfs_props_table = props;
3926 3932
3927 3933 curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
3928 3934
3929 3935 while (curr) {
3930 3936 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
3931 3937 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
3932 3938
3933 3939 /*
3934 3940 * User properties will result in ZPROP_INVAL, and since we
3935 3941 * only know how to prune standard ZFS properties, we always
3936 3942 * leave these in the list. This can also happen if we
3937 3943 * encounter an unknown DSL property (when running older
3938 3944 * software, for example).
3939 3945 */
3940 3946 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
3941 3947 (void) nvlist_remove(zhp->zfs_props,
3942 3948 nvpair_name(curr), nvpair_type(curr));
3943 3949 curr = next;
3944 3950 }
3945 3951 }
3946 3952
3947 3953 static int
3948 3954 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
3949 3955 zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
3950 3956 {
3951 3957 zfs_cmd_t zc = { 0 };
3952 3958 nvlist_t *nvlist = NULL;
3953 3959 int error;
3954 3960
3955 3961 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3956 3962 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
3957 3963 zc.zc_cookie = (uint64_t)cmd;
3958 3964
3959 3965 if (cmd == ZFS_SMB_ACL_RENAME) {
3960 3966 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
3961 3967 (void) no_memory(hdl);
3962 3968 return (NULL);
3963 3969 }
3964 3970 }
3965 3971
3966 3972 switch (cmd) {
3967 3973 case ZFS_SMB_ACL_ADD:
3968 3974 case ZFS_SMB_ACL_REMOVE:
3969 3975 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
3970 3976 break;
3971 3977 case ZFS_SMB_ACL_RENAME:
3972 3978 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
3973 3979 resource1) != 0) {
3974 3980 (void) no_memory(hdl);
3975 3981 return (-1);
3976 3982 }
3977 3983 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
3978 3984 resource2) != 0) {
3979 3985 (void) no_memory(hdl);
3980 3986 return (-1);
3981 3987 }
3982 3988 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
3983 3989 nvlist_free(nvlist);
3984 3990 return (-1);
3985 3991 }
3986 3992 break;
3987 3993 case ZFS_SMB_ACL_PURGE:
3988 3994 break;
3989 3995 default:
3990 3996 return (-1);
3991 3997 }
3992 3998 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
3993 3999 if (nvlist)
3994 4000 nvlist_free(nvlist);
3995 4001 return (error);
3996 4002 }
3997 4003
3998 4004 int
3999 4005 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4000 4006 char *path, char *resource)
4001 4007 {
4002 4008 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4003 4009 resource, NULL));
4004 4010 }
4005 4011
4006 4012 int
4007 4013 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4008 4014 char *path, char *resource)
4009 4015 {
4010 4016 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4011 4017 resource, NULL));
4012 4018 }
4013 4019
4014 4020 int
4015 4021 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4016 4022 {
4017 4023 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4018 4024 NULL, NULL));
4019 4025 }
4020 4026
4021 4027 int
4022 4028 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4023 4029 char *oldname, char *newname)
4024 4030 {
4025 4031 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4026 4032 oldname, newname));
4027 4033 }
4028 4034
4029 4035 int
4030 4036 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4031 4037 zfs_userspace_cb_t func, void *arg)
4032 4038 {
4033 4039 zfs_cmd_t zc = { 0 };
4034 4040 zfs_useracct_t buf[100];
4035 4041 libzfs_handle_t *hdl = zhp->zfs_hdl;
4036 4042 int ret;
4037 4043
4038 4044 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4039 4045
4040 4046 zc.zc_objset_type = type;
4041 4047 zc.zc_nvlist_dst = (uintptr_t)buf;
4042 4048
4043 4049 for (;;) {
4044 4050 zfs_useracct_t *zua = buf;
4045 4051
4046 4052 zc.zc_nvlist_dst_size = sizeof (buf);
4047 4053 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4048 4054 char errbuf[1024];
4049 4055
4050 4056 (void) snprintf(errbuf, sizeof (errbuf),
4051 4057 dgettext(TEXT_DOMAIN,
4052 4058 "cannot get used/quota for %s"), zc.zc_name);
4053 4059 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4054 4060 }
4055 4061 if (zc.zc_nvlist_dst_size == 0)
4056 4062 break;
4057 4063
4058 4064 while (zc.zc_nvlist_dst_size > 0) {
4059 4065 if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4060 4066 zua->zu_space)) != 0)
4061 4067 return (ret);
4062 4068 zua++;
4063 4069 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4064 4070 }
4065 4071 }
4066 4072
4067 4073 return (0);
4068 4074 }
4069 4075
4070 4076 struct holdarg {
4071 4077 nvlist_t *nvl;
4072 4078 const char *snapname;
4073 4079 const char *tag;
4074 4080 boolean_t recursive;
4075 4081 int error;
4076 4082 };
4077 4083
4078 4084 static int
4079 4085 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4080 4086 {
4081 4087 struct holdarg *ha = arg;
4082 4088 char name[ZFS_MAXNAMELEN];
4083 4089 int rv = 0;
4084 4090
4085 4091 (void) snprintf(name, sizeof (name),
4086 4092 "%s@%s", zhp->zfs_name, ha->snapname);
4087 4093
4088 4094 if (lzc_exists(name))
4089 4095 fnvlist_add_string(ha->nvl, name, ha->tag);
4090 4096
4091 4097 if (ha->recursive)
4092 4098 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4093 4099 zfs_close(zhp);
4094 4100 return (rv);
4095 4101 }
4096 4102
4097 4103 int
4098 4104 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4099 4105 boolean_t recursive, int cleanup_fd)
4100 4106 {
4101 4107 int ret;
4102 4108 struct holdarg ha;
4103 4109
4104 4110 ha.nvl = fnvlist_alloc();
4105 4111 ha.snapname = snapname;
4106 4112 ha.tag = tag;
4107 4113 ha.recursive = recursive;
4108 4114 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4109 4115
4110 4116 if (nvlist_empty(ha.nvl)) {
4111 4117 char errbuf[1024];
4112 4118
4113 4119 fnvlist_free(ha.nvl);
4114 4120 ret = ENOENT;
4115 4121 (void) snprintf(errbuf, sizeof (errbuf),
4116 4122 dgettext(TEXT_DOMAIN,
4117 4123 "cannot hold snapshot '%s@%s'"),
4118 4124 zhp->zfs_name, snapname);
4119 4125 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4120 4126 return (ret);
4121 4127 }
4122 4128
4123 4129 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4124 4130 fnvlist_free(ha.nvl);
4125 4131
4126 4132 return (ret);
4127 4133 }
4128 4134
4129 4135 int
4130 4136 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4131 4137 {
4132 4138 int ret;
4133 4139 nvlist_t *errors;
4134 4140 libzfs_handle_t *hdl = zhp->zfs_hdl;
4135 4141 char errbuf[1024];
4136 4142 nvpair_t *elem;
4137 4143
4138 4144 errors = NULL;
4139 4145 ret = lzc_hold(holds, cleanup_fd, &errors);
4140 4146
4141 4147 if (ret == 0) {
4142 4148 /* There may be errors even in the success case. */
4143 4149 fnvlist_free(errors);
4144 4150 return (0);
4145 4151 }
4146 4152
4147 4153 if (nvlist_empty(errors)) {
4148 4154 /* no hold-specific errors */
4149 4155 (void) snprintf(errbuf, sizeof (errbuf),
4150 4156 dgettext(TEXT_DOMAIN, "cannot hold"));
4151 4157 switch (ret) {
4152 4158 case ENOTSUP:
4153 4159 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4154 4160 "pool must be upgraded"));
4155 4161 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4156 4162 break;
4157 4163 case EINVAL:
4158 4164 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4159 4165 break;
4160 4166 default:
4161 4167 (void) zfs_standard_error(hdl, ret, errbuf);
4162 4168 }
4163 4169 }
4164 4170
4165 4171 for (elem = nvlist_next_nvpair(errors, NULL);
4166 4172 elem != NULL;
4167 4173 elem = nvlist_next_nvpair(errors, elem)) {
4168 4174 (void) snprintf(errbuf, sizeof (errbuf),
4169 4175 dgettext(TEXT_DOMAIN,
4170 4176 "cannot hold snapshot '%s'"), nvpair_name(elem));
4171 4177 switch (fnvpair_value_int32(elem)) {
4172 4178 case E2BIG:
4173 4179 /*
4174 4180 * Temporary tags wind up having the ds object id
4175 4181 * prepended. So even if we passed the length check
4176 4182 * above, it's still possible for the tag to wind
4177 4183 * up being slightly too long.
4178 4184 */
4179 4185 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4180 4186 break;
4181 4187 case EINVAL:
4182 4188 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4183 4189 break;
4184 4190 case EEXIST:
4185 4191 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4186 4192 break;
4187 4193 default:
4188 4194 (void) zfs_standard_error(hdl,
4189 4195 fnvpair_value_int32(elem), errbuf);
4190 4196 }
4191 4197 }
4192 4198
4193 4199 fnvlist_free(errors);
4194 4200 return (ret);
4195 4201 }
4196 4202
4197 4203 static int
4198 4204 zfs_release_one(zfs_handle_t *zhp, void *arg)
4199 4205 {
4200 4206 struct holdarg *ha = arg;
4201 4207 char name[ZFS_MAXNAMELEN];
4202 4208 int rv = 0;
4203 4209 nvlist_t *existing_holds;
4204 4210
4205 4211 (void) snprintf(name, sizeof (name),
4206 4212 "%s@%s", zhp->zfs_name, ha->snapname);
4207 4213
4208 4214 if (lzc_get_holds(name, &existing_holds) != 0) {
4209 4215 ha->error = ENOENT;
4210 4216 } else if (!nvlist_exists(existing_holds, ha->tag)) {
4211 4217 ha->error = ESRCH;
4212 4218 } else {
4213 4219 nvlist_t *torelease = fnvlist_alloc();
4214 4220 fnvlist_add_boolean(torelease, ha->tag);
4215 4221 fnvlist_add_nvlist(ha->nvl, name, torelease);
4216 4222 fnvlist_free(torelease);
4217 4223 }
4218 4224
4219 4225 if (ha->recursive)
4220 4226 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4221 4227 zfs_close(zhp);
4222 4228 return (rv);
4223 4229 }
4224 4230
4225 4231 int
4226 4232 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4227 4233 boolean_t recursive)
4228 4234 {
4229 4235 int ret;
4230 4236 struct holdarg ha;
4231 4237 nvlist_t *errors = NULL;
4232 4238 nvpair_t *elem;
4233 4239 libzfs_handle_t *hdl = zhp->zfs_hdl;
4234 4240 char errbuf[1024];
4235 4241
4236 4242 ha.nvl = fnvlist_alloc();
4237 4243 ha.snapname = snapname;
4238 4244 ha.tag = tag;
4239 4245 ha.recursive = recursive;
4240 4246 ha.error = 0;
4241 4247 (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4242 4248
4243 4249 if (nvlist_empty(ha.nvl)) {
4244 4250 fnvlist_free(ha.nvl);
4245 4251 ret = ha.error;
4246 4252 (void) snprintf(errbuf, sizeof (errbuf),
4247 4253 dgettext(TEXT_DOMAIN,
4248 4254 "cannot release hold from snapshot '%s@%s'"),
4249 4255 zhp->zfs_name, snapname);
4250 4256 if (ret == ESRCH) {
4251 4257 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4252 4258 } else {
4253 4259 (void) zfs_standard_error(hdl, ret, errbuf);
4254 4260 }
4255 4261 return (ret);
4256 4262 }
4257 4263
4258 4264 ret = lzc_release(ha.nvl, &errors);
4259 4265 fnvlist_free(ha.nvl);
4260 4266
4261 4267 if (ret == 0) {
4262 4268 /* There may be errors even in the success case. */
4263 4269 fnvlist_free(errors);
4264 4270 return (0);
4265 4271 }
4266 4272
4267 4273 if (nvlist_empty(errors)) {
4268 4274 /* no hold-specific errors */
4269 4275 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4270 4276 "cannot release"));
4271 4277 switch (errno) {
4272 4278 case ENOTSUP:
4273 4279 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4274 4280 "pool must be upgraded"));
4275 4281 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4276 4282 break;
4277 4283 default:
4278 4284 (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4279 4285 }
4280 4286 }
4281 4287
4282 4288 for (elem = nvlist_next_nvpair(errors, NULL);
4283 4289 elem != NULL;
4284 4290 elem = nvlist_next_nvpair(errors, elem)) {
4285 4291 (void) snprintf(errbuf, sizeof (errbuf),
4286 4292 dgettext(TEXT_DOMAIN,
4287 4293 "cannot release hold from snapshot '%s'"),
4288 4294 nvpair_name(elem));
4289 4295 switch (fnvpair_value_int32(elem)) {
4290 4296 case ESRCH:
4291 4297 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4292 4298 break;
4293 4299 case EINVAL:
4294 4300 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4295 4301 break;
4296 4302 default:
4297 4303 (void) zfs_standard_error_fmt(hdl,
4298 4304 fnvpair_value_int32(elem), errbuf);
4299 4305 }
4300 4306 }
4301 4307
4302 4308 fnvlist_free(errors);
4303 4309 return (ret);
4304 4310 }
4305 4311
4306 4312 int
4307 4313 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4308 4314 {
4309 4315 zfs_cmd_t zc = { 0 };
4310 4316 libzfs_handle_t *hdl = zhp->zfs_hdl;
4311 4317 int nvsz = 2048;
4312 4318 void *nvbuf;
4313 4319 int err = 0;
4314 4320 char errbuf[1024];
4315 4321
4316 4322 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4317 4323 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4318 4324
4319 4325 tryagain:
4320 4326
4321 4327 nvbuf = malloc(nvsz);
4322 4328 if (nvbuf == NULL) {
4323 4329 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4324 4330 goto out;
4325 4331 }
4326 4332
4327 4333 zc.zc_nvlist_dst_size = nvsz;
4328 4334 zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4329 4335
4330 4336 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4331 4337
4332 4338 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4333 4339 (void) snprintf(errbuf, sizeof (errbuf),
4334 4340 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4335 4341 zc.zc_name);
4336 4342 switch (errno) {
4337 4343 case ENOMEM:
4338 4344 free(nvbuf);
4339 4345 nvsz = zc.zc_nvlist_dst_size;
4340 4346 goto tryagain;
4341 4347
4342 4348 case ENOTSUP:
4343 4349 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4344 4350 "pool must be upgraded"));
4345 4351 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4346 4352 break;
4347 4353 case EINVAL:
4348 4354 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4349 4355 break;
4350 4356 case ENOENT:
4351 4357 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4352 4358 break;
4353 4359 default:
4354 4360 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4355 4361 break;
4356 4362 }
4357 4363 } else {
4358 4364 /* success */
4359 4365 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4360 4366 if (rc) {
4361 4367 (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4362 4368 TEXT_DOMAIN, "cannot get permissions on '%s'"),
4363 4369 zc.zc_name);
4364 4370 err = zfs_standard_error_fmt(hdl, rc, errbuf);
4365 4371 }
4366 4372 }
4367 4373
4368 4374 free(nvbuf);
4369 4375 out:
4370 4376 return (err);
4371 4377 }
4372 4378
4373 4379 int
4374 4380 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4375 4381 {
4376 4382 zfs_cmd_t zc = { 0 };
4377 4383 libzfs_handle_t *hdl = zhp->zfs_hdl;
4378 4384 char *nvbuf;
4379 4385 char errbuf[1024];
4380 4386 size_t nvsz;
4381 4387 int err;
4382 4388
4383 4389 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4384 4390 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4385 4391
4386 4392 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4387 4393 assert(err == 0);
4388 4394
4389 4395 nvbuf = malloc(nvsz);
4390 4396
4391 4397 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4392 4398 assert(err == 0);
4393 4399
4394 4400 zc.zc_nvlist_src_size = nvsz;
4395 4401 zc.zc_nvlist_src = (uintptr_t)nvbuf;
4396 4402 zc.zc_perm_action = un;
4397 4403
4398 4404 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4399 4405
4400 4406 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4401 4407 (void) snprintf(errbuf, sizeof (errbuf),
4402 4408 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4403 4409 zc.zc_name);
4404 4410 switch (errno) {
4405 4411 case ENOTSUP:
4406 4412 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4407 4413 "pool must be upgraded"));
4408 4414 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4409 4415 break;
4410 4416 case EINVAL:
4411 4417 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4412 4418 break;
4413 4419 case ENOENT:
4414 4420 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4415 4421 break;
4416 4422 default:
4417 4423 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4418 4424 break;
4419 4425 }
4420 4426 }
4421 4427
4422 4428 free(nvbuf);
4423 4429
4424 4430 return (err);
4425 4431 }
4426 4432
4427 4433 int
4428 4434 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4429 4435 {
4430 4436 int err;
4431 4437 char errbuf[1024];
4432 4438
4433 4439 err = lzc_get_holds(zhp->zfs_name, nvl);
4434 4440
4435 4441 if (err != 0) {
4436 4442 libzfs_handle_t *hdl = zhp->zfs_hdl;
4437 4443
4438 4444 (void) snprintf(errbuf, sizeof (errbuf),
4439 4445 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4440 4446 zhp->zfs_name);
4441 4447 switch (err) {
4442 4448 case ENOTSUP:
4443 4449 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4444 4450 "pool must be upgraded"));
4445 4451 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4446 4452 break;
4447 4453 case EINVAL:
4448 4454 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4449 4455 break;
4450 4456 case ENOENT:
4451 4457 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4452 4458 break;
4453 4459 default:
4454 4460 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4455 4461 break;
4456 4462 }
4457 4463 }
4458 4464
4459 4465 return (err);
4460 4466 }
4461 4467
4462 4468 /*
4463 4469 * Convert the zvol's volume size to an appropriate reservation.
4464 4470 * Note: If this routine is updated, it is necessary to update the ZFS test
4465 4471 * suite's shell version in reservation.kshlib.
4466 4472 */
4467 4473 uint64_t
4468 4474 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4469 4475 {
4470 4476 uint64_t numdb;
4471 4477 uint64_t nblocks, volblocksize;
4472 4478 int ncopies;
4473 4479 char *strval;
4474 4480
4475 4481 if (nvlist_lookup_string(props,
4476 4482 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4477 4483 ncopies = atoi(strval);
4478 4484 else
4479 4485 ncopies = 1;
4480 4486 if (nvlist_lookup_uint64(props,
4481 4487 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4482 4488 &volblocksize) != 0)
4483 4489 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4484 4490 nblocks = volsize/volblocksize;
4485 4491 /* start with metadnode L0-L6 */
4486 4492 numdb = 7;
4487 4493 /* calculate number of indirects */
4488 4494 while (nblocks > 1) {
4489 4495 nblocks += DNODES_PER_LEVEL - 1;
4490 4496 nblocks /= DNODES_PER_LEVEL;
4491 4497 numdb += nblocks;
4492 4498 }
4493 4499 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4494 4500 volsize *= ncopies;
4495 4501 /*
4496 4502 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4497 4503 * compressed, but in practice they compress down to about
4498 4504 * 1100 bytes
4499 4505 */
4500 4506 numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4501 4507 volsize += numdb;
4502 4508 return (volsize);
4503 4509 }
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