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4012 Upper limit of zfs set bounds check for refreservation on volumes is too low
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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.
|
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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 - * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved.
25 + * Copyright 2013 DEY Storage Systems, Inc.
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 }
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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 + int ncopies = zfs_prop_get_int(zhp, ZFS_PROP_COPIES);
1212 1213 char buf[64];
1213 1214
1214 1215 switch (prop) {
1215 1216 case ZFS_PROP_RESERVATION:
1216 1217 case ZFS_PROP_REFRESERVATION:
1217 - if (intval > volsize) {
1218 + if (intval >
1219 + zvol_volsize_to_reservation_impl(volsize,
1220 + blocksize, ncopies)) {
1218 1221 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1219 1222 "'%s' is greater than current "
1220 1223 "volume size"), propname);
1221 1224 (void) zfs_error(hdl, EZFS_BADPROP,
1222 1225 errbuf);
1223 1226 goto error;
1224 1227 }
1225 1228 break;
1226 1229
1227 1230 case ZFS_PROP_VOLSIZE:
1228 1231 if (intval % blocksize != 0) {
1229 1232 zfs_nicenum(blocksize, buf,
1230 1233 sizeof (buf));
1231 1234 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1232 1235 "'%s' must be a multiple of "
1233 1236 "volume block size (%s)"),
1234 1237 propname, buf);
1235 1238 (void) zfs_error(hdl, EZFS_BADPROP,
1236 1239 errbuf);
1237 1240 goto error;
1238 1241 }
1239 1242
1240 1243 if (intval == 0) {
1241 1244 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1242 1245 "'%s' cannot be zero"),
1243 1246 propname);
1244 1247 (void) zfs_error(hdl, EZFS_BADPROP,
1245 1248 errbuf);
1246 1249 goto error;
1247 1250 }
1248 1251 break;
1249 1252 }
1250 1253 }
1251 1254 }
1252 1255
1253 1256 /*
1254 1257 * If normalization was chosen, but no UTF8 choice was made,
1255 1258 * enforce rejection of non-UTF8 names.
1256 1259 *
1257 1260 * If normalization was chosen, but rejecting non-UTF8 names
1258 1261 * was explicitly not chosen, it is an error.
1259 1262 */
1260 1263 if (chosen_normal > 0 && chosen_utf < 0) {
1261 1264 if (nvlist_add_uint64(ret,
1262 1265 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1263 1266 (void) no_memory(hdl);
1264 1267 goto error;
1265 1268 }
1266 1269 } else if (chosen_normal > 0 && chosen_utf == 0) {
1267 1270 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1268 1271 "'%s' must be set 'on' if normalization chosen"),
1269 1272 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1270 1273 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1271 1274 goto error;
1272 1275 }
1273 1276 return (ret);
1274 1277
1275 1278 error:
1276 1279 nvlist_free(ret);
1277 1280 return (NULL);
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1278 1281 }
1279 1282
1280 1283 int
1281 1284 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1282 1285 {
1283 1286 uint64_t old_volsize;
1284 1287 uint64_t new_volsize;
1285 1288 uint64_t old_reservation;
1286 1289 uint64_t new_reservation;
1287 1290 zfs_prop_t resv_prop;
1288 - nvlist_t *props;
1291 + uint64_t volblocksize;
1292 + int ncopies;
1289 1293
1290 1294 /*
1291 1295 * If this is an existing volume, and someone is setting the volsize,
1292 1296 * make sure that it matches the reservation, or add it if necessary.
1293 1297 */
1294 1298 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1295 1299 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1296 1300 return (-1);
1297 1301 old_reservation = zfs_prop_get_int(zhp, resv_prop);
1302 + volblocksize = zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE);
1303 + ncopies = zfs_prop_get_int(zhp, ZFS_PROP_COPIES);
1298 1304
1299 - props = fnvlist_alloc();
1300 - fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1301 - zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1302 -
1303 - if ((zvol_volsize_to_reservation(old_volsize, props) !=
1304 - old_reservation) || nvlist_exists(nvl,
1305 - zfs_prop_to_name(resv_prop))) {
1306 - fnvlist_free(props);
1305 + if ((zvol_volsize_to_reservation_impl(old_volsize, volblocksize,
1306 + ncopies) != old_reservation) || nvlist_exists(nvl,
1307 + zfs_prop_to_name(resv_prop)))
1307 1308 return (0);
1308 - }
1309 1309 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1310 - &new_volsize) != 0) {
1311 - fnvlist_free(props);
1310 + &new_volsize) != 0)
1312 1311 return (-1);
1313 - }
1314 - new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1315 - fnvlist_free(props);
1312 + new_reservation = zvol_volsize_to_reservation_impl(new_volsize,
1313 + volblocksize, ncopies);
1316 1314
1317 1315 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1318 1316 new_reservation) != 0) {
1319 1317 (void) no_memory(zhp->zfs_hdl);
1320 1318 return (-1);
1321 1319 }
1322 1320 return (1);
1323 1321 }
1324 1322
1325 1323 void
1326 1324 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1327 1325 char *errbuf)
1328 1326 {
1329 1327 switch (err) {
1330 1328
1331 1329 case ENOSPC:
1332 1330 /*
1333 1331 * For quotas and reservations, ENOSPC indicates
1334 1332 * something different; setting a quota or reservation
1335 1333 * doesn't use any disk space.
1336 1334 */
1337 1335 switch (prop) {
1338 1336 case ZFS_PROP_QUOTA:
1339 1337 case ZFS_PROP_REFQUOTA:
1340 1338 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1341 1339 "size is less than current used or "
1342 1340 "reserved space"));
1343 1341 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1344 1342 break;
1345 1343
1346 1344 case ZFS_PROP_RESERVATION:
1347 1345 case ZFS_PROP_REFRESERVATION:
1348 1346 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1349 1347 "size is greater than available space"));
1350 1348 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1351 1349 break;
1352 1350
1353 1351 default:
1354 1352 (void) zfs_standard_error(hdl, err, errbuf);
1355 1353 break;
1356 1354 }
1357 1355 break;
1358 1356
1359 1357 case EBUSY:
1360 1358 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1361 1359 break;
1362 1360
1363 1361 case EROFS:
1364 1362 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1365 1363 break;
1366 1364
1367 1365 case ENOTSUP:
1368 1366 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1369 1367 "pool and or dataset must be upgraded to set this "
1370 1368 "property or value"));
1371 1369 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1372 1370 break;
1373 1371
1374 1372 case ERANGE:
1375 1373 if (prop == ZFS_PROP_COMPRESSION) {
1376 1374 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1377 1375 "property setting is not allowed on "
1378 1376 "bootable datasets"));
1379 1377 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1380 1378 } else {
1381 1379 (void) zfs_standard_error(hdl, err, errbuf);
1382 1380 }
1383 1381 break;
1384 1382
1385 1383 case EINVAL:
1386 1384 if (prop == ZPROP_INVAL) {
1387 1385 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1388 1386 } else {
1389 1387 (void) zfs_standard_error(hdl, err, errbuf);
1390 1388 }
1391 1389 break;
1392 1390
1393 1391 case EOVERFLOW:
1394 1392 /*
1395 1393 * This platform can't address a volume this big.
1396 1394 */
1397 1395 #ifdef _ILP32
1398 1396 if (prop == ZFS_PROP_VOLSIZE) {
1399 1397 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1400 1398 break;
1401 1399 }
1402 1400 #endif
1403 1401 /* FALLTHROUGH */
1404 1402 default:
1405 1403 (void) zfs_standard_error(hdl, err, errbuf);
1406 1404 }
1407 1405 }
1408 1406
1409 1407 /*
1410 1408 * Given a property name and value, set the property for the given dataset.
1411 1409 */
1412 1410 int
1413 1411 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1414 1412 {
1415 1413 zfs_cmd_t zc = { 0 };
1416 1414 int ret = -1;
1417 1415 prop_changelist_t *cl = NULL;
1418 1416 char errbuf[1024];
1419 1417 libzfs_handle_t *hdl = zhp->zfs_hdl;
1420 1418 nvlist_t *nvl = NULL, *realprops;
1421 1419 zfs_prop_t prop;
1422 1420 boolean_t do_prefix = B_TRUE;
1423 1421 int added_resv;
1424 1422
1425 1423 (void) snprintf(errbuf, sizeof (errbuf),
1426 1424 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1427 1425 zhp->zfs_name);
1428 1426
1429 1427 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1430 1428 nvlist_add_string(nvl, propname, propval) != 0) {
1431 1429 (void) no_memory(hdl);
1432 1430 goto error;
1433 1431 }
1434 1432
1435 1433 if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl,
1436 1434 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
1437 1435 goto error;
1438 1436
1439 1437 nvlist_free(nvl);
1440 1438 nvl = realprops;
1441 1439
1442 1440 prop = zfs_name_to_prop(propname);
1443 1441
1444 1442 if (prop == ZFS_PROP_VOLSIZE) {
1445 1443 if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1)
1446 1444 goto error;
1447 1445 }
1448 1446
1449 1447 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1450 1448 goto error;
1451 1449
1452 1450 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1453 1451 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1454 1452 "child dataset with inherited mountpoint is used "
1455 1453 "in a non-global zone"));
1456 1454 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1457 1455 goto error;
1458 1456 }
1459 1457
1460 1458 /*
1461 1459 * We don't want to unmount & remount the dataset when changing
1462 1460 * its canmount property to 'on' or 'noauto'. We only use
1463 1461 * the changelist logic to unmount when setting canmount=off.
1464 1462 */
1465 1463 if (prop == ZFS_PROP_CANMOUNT) {
1466 1464 uint64_t idx;
1467 1465 int err = zprop_string_to_index(prop, propval, &idx,
1468 1466 ZFS_TYPE_DATASET);
1469 1467 if (err == 0 && idx != ZFS_CANMOUNT_OFF)
1470 1468 do_prefix = B_FALSE;
1471 1469 }
1472 1470
1473 1471 if (do_prefix && (ret = changelist_prefix(cl)) != 0)
1474 1472 goto error;
1475 1473
1476 1474 /*
1477 1475 * Execute the corresponding ioctl() to set this property.
1478 1476 */
1479 1477 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1480 1478
1481 1479 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1482 1480 goto error;
1483 1481
1484 1482 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1485 1483
1486 1484 if (ret != 0) {
1487 1485 zfs_setprop_error(hdl, prop, errno, errbuf);
1488 1486 if (added_resv && errno == ENOSPC) {
1489 1487 /* clean up the volsize property we tried to set */
1490 1488 uint64_t old_volsize = zfs_prop_get_int(zhp,
1491 1489 ZFS_PROP_VOLSIZE);
1492 1490 nvlist_free(nvl);
1493 1491 zcmd_free_nvlists(&zc);
1494 1492 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1495 1493 goto error;
1496 1494 if (nvlist_add_uint64(nvl,
1497 1495 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1498 1496 old_volsize) != 0)
1499 1497 goto error;
1500 1498 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1501 1499 goto error;
1502 1500 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1503 1501 }
1504 1502 } else {
1505 1503 if (do_prefix)
1506 1504 ret = changelist_postfix(cl);
1507 1505
1508 1506 /*
1509 1507 * Refresh the statistics so the new property value
1510 1508 * is reflected.
1511 1509 */
1512 1510 if (ret == 0)
1513 1511 (void) get_stats(zhp);
1514 1512 }
1515 1513
1516 1514 error:
1517 1515 nvlist_free(nvl);
1518 1516 zcmd_free_nvlists(&zc);
1519 1517 if (cl)
1520 1518 changelist_free(cl);
1521 1519 return (ret);
1522 1520 }
1523 1521
1524 1522 /*
1525 1523 * Given a property, inherit the value from the parent dataset, or if received
1526 1524 * is TRUE, revert to the received value, if any.
1527 1525 */
1528 1526 int
1529 1527 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1530 1528 {
1531 1529 zfs_cmd_t zc = { 0 };
1532 1530 int ret;
1533 1531 prop_changelist_t *cl;
1534 1532 libzfs_handle_t *hdl = zhp->zfs_hdl;
1535 1533 char errbuf[1024];
1536 1534 zfs_prop_t prop;
1537 1535
1538 1536 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1539 1537 "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1540 1538
1541 1539 zc.zc_cookie = received;
1542 1540 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1543 1541 /*
1544 1542 * For user properties, the amount of work we have to do is very
1545 1543 * small, so just do it here.
1546 1544 */
1547 1545 if (!zfs_prop_user(propname)) {
1548 1546 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1549 1547 "invalid property"));
1550 1548 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1551 1549 }
1552 1550
1553 1551 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1554 1552 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1555 1553
1556 1554 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1557 1555 return (zfs_standard_error(hdl, errno, errbuf));
1558 1556
1559 1557 return (0);
1560 1558 }
1561 1559
1562 1560 /*
1563 1561 * Verify that this property is inheritable.
1564 1562 */
1565 1563 if (zfs_prop_readonly(prop))
1566 1564 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1567 1565
1568 1566 if (!zfs_prop_inheritable(prop) && !received)
1569 1567 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1570 1568
1571 1569 /*
1572 1570 * Check to see if the value applies to this type
1573 1571 */
1574 1572 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1575 1573 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1576 1574
1577 1575 /*
1578 1576 * Normalize the name, to get rid of shorthand abbreviations.
1579 1577 */
1580 1578 propname = zfs_prop_to_name(prop);
1581 1579 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1582 1580 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1583 1581
1584 1582 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1585 1583 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1586 1584 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1587 1585 "dataset is used in a non-global zone"));
1588 1586 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1589 1587 }
1590 1588
1591 1589 /*
1592 1590 * Determine datasets which will be affected by this change, if any.
1593 1591 */
1594 1592 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1595 1593 return (-1);
1596 1594
1597 1595 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1598 1596 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1599 1597 "child dataset with inherited mountpoint is used "
1600 1598 "in a non-global zone"));
1601 1599 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1602 1600 goto error;
1603 1601 }
1604 1602
1605 1603 if ((ret = changelist_prefix(cl)) != 0)
1606 1604 goto error;
1607 1605
1608 1606 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1609 1607 return (zfs_standard_error(hdl, errno, errbuf));
1610 1608 } else {
1611 1609
1612 1610 if ((ret = changelist_postfix(cl)) != 0)
1613 1611 goto error;
1614 1612
1615 1613 /*
1616 1614 * Refresh the statistics so the new property is reflected.
1617 1615 */
1618 1616 (void) get_stats(zhp);
1619 1617 }
1620 1618
1621 1619 error:
1622 1620 changelist_free(cl);
1623 1621 return (ret);
1624 1622 }
1625 1623
1626 1624 /*
1627 1625 * True DSL properties are stored in an nvlist. The following two functions
1628 1626 * extract them appropriately.
1629 1627 */
1630 1628 static uint64_t
1631 1629 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1632 1630 {
1633 1631 nvlist_t *nv;
1634 1632 uint64_t value;
1635 1633
1636 1634 *source = NULL;
1637 1635 if (nvlist_lookup_nvlist(zhp->zfs_props,
1638 1636 zfs_prop_to_name(prop), &nv) == 0) {
1639 1637 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1640 1638 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1641 1639 } else {
1642 1640 verify(!zhp->zfs_props_table ||
1643 1641 zhp->zfs_props_table[prop] == B_TRUE);
1644 1642 value = zfs_prop_default_numeric(prop);
1645 1643 *source = "";
1646 1644 }
1647 1645
1648 1646 return (value);
1649 1647 }
1650 1648
1651 1649 static char *
1652 1650 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1653 1651 {
1654 1652 nvlist_t *nv;
1655 1653 char *value;
1656 1654
1657 1655 *source = NULL;
1658 1656 if (nvlist_lookup_nvlist(zhp->zfs_props,
1659 1657 zfs_prop_to_name(prop), &nv) == 0) {
1660 1658 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
1661 1659 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1662 1660 } else {
1663 1661 verify(!zhp->zfs_props_table ||
1664 1662 zhp->zfs_props_table[prop] == B_TRUE);
1665 1663 if ((value = (char *)zfs_prop_default_string(prop)) == NULL)
1666 1664 value = "";
1667 1665 *source = "";
1668 1666 }
1669 1667
1670 1668 return (value);
1671 1669 }
1672 1670
1673 1671 static boolean_t
1674 1672 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1675 1673 {
1676 1674 return (zhp->zfs_props == zhp->zfs_recvd_props);
1677 1675 }
1678 1676
1679 1677 static void
1680 1678 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1681 1679 {
1682 1680 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1683 1681 zhp->zfs_props = zhp->zfs_recvd_props;
1684 1682 }
1685 1683
1686 1684 static void
1687 1685 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1688 1686 {
1689 1687 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1690 1688 *cookie = 0;
1691 1689 }
1692 1690
1693 1691 /*
1694 1692 * Internal function for getting a numeric property. Both zfs_prop_get() and
1695 1693 * zfs_prop_get_int() are built using this interface.
1696 1694 *
1697 1695 * Certain properties can be overridden using 'mount -o'. In this case, scan
1698 1696 * the contents of the /etc/mnttab entry, searching for the appropriate options.
1699 1697 * If they differ from the on-disk values, report the current values and mark
1700 1698 * the source "temporary".
1701 1699 */
1702 1700 static int
1703 1701 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1704 1702 char **source, uint64_t *val)
1705 1703 {
1706 1704 zfs_cmd_t zc = { 0 };
1707 1705 nvlist_t *zplprops = NULL;
1708 1706 struct mnttab mnt;
1709 1707 char *mntopt_on = NULL;
1710 1708 char *mntopt_off = NULL;
1711 1709 boolean_t received = zfs_is_recvd_props_mode(zhp);
1712 1710
1713 1711 *source = NULL;
1714 1712
1715 1713 switch (prop) {
1716 1714 case ZFS_PROP_ATIME:
1717 1715 mntopt_on = MNTOPT_ATIME;
1718 1716 mntopt_off = MNTOPT_NOATIME;
1719 1717 break;
1720 1718
1721 1719 case ZFS_PROP_DEVICES:
1722 1720 mntopt_on = MNTOPT_DEVICES;
1723 1721 mntopt_off = MNTOPT_NODEVICES;
1724 1722 break;
1725 1723
1726 1724 case ZFS_PROP_EXEC:
1727 1725 mntopt_on = MNTOPT_EXEC;
1728 1726 mntopt_off = MNTOPT_NOEXEC;
1729 1727 break;
1730 1728
1731 1729 case ZFS_PROP_READONLY:
1732 1730 mntopt_on = MNTOPT_RO;
1733 1731 mntopt_off = MNTOPT_RW;
1734 1732 break;
1735 1733
1736 1734 case ZFS_PROP_SETUID:
1737 1735 mntopt_on = MNTOPT_SETUID;
1738 1736 mntopt_off = MNTOPT_NOSETUID;
1739 1737 break;
1740 1738
1741 1739 case ZFS_PROP_XATTR:
1742 1740 mntopt_on = MNTOPT_XATTR;
1743 1741 mntopt_off = MNTOPT_NOXATTR;
1744 1742 break;
1745 1743
1746 1744 case ZFS_PROP_NBMAND:
1747 1745 mntopt_on = MNTOPT_NBMAND;
1748 1746 mntopt_off = MNTOPT_NONBMAND;
1749 1747 break;
1750 1748 }
1751 1749
1752 1750 /*
1753 1751 * Because looking up the mount options is potentially expensive
1754 1752 * (iterating over all of /etc/mnttab), we defer its calculation until
1755 1753 * we're looking up a property which requires its presence.
1756 1754 */
1757 1755 if (!zhp->zfs_mntcheck &&
1758 1756 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1759 1757 libzfs_handle_t *hdl = zhp->zfs_hdl;
1760 1758 struct mnttab entry;
1761 1759
1762 1760 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1763 1761 zhp->zfs_mntopts = zfs_strdup(hdl,
1764 1762 entry.mnt_mntopts);
1765 1763 if (zhp->zfs_mntopts == NULL)
1766 1764 return (-1);
1767 1765 }
1768 1766
1769 1767 zhp->zfs_mntcheck = B_TRUE;
1770 1768 }
1771 1769
1772 1770 if (zhp->zfs_mntopts == NULL)
1773 1771 mnt.mnt_mntopts = "";
1774 1772 else
1775 1773 mnt.mnt_mntopts = zhp->zfs_mntopts;
1776 1774
1777 1775 switch (prop) {
1778 1776 case ZFS_PROP_ATIME:
1779 1777 case ZFS_PROP_DEVICES:
1780 1778 case ZFS_PROP_EXEC:
1781 1779 case ZFS_PROP_READONLY:
1782 1780 case ZFS_PROP_SETUID:
1783 1781 case ZFS_PROP_XATTR:
1784 1782 case ZFS_PROP_NBMAND:
1785 1783 *val = getprop_uint64(zhp, prop, source);
1786 1784
1787 1785 if (received)
1788 1786 break;
1789 1787
1790 1788 if (hasmntopt(&mnt, mntopt_on) && !*val) {
1791 1789 *val = B_TRUE;
1792 1790 if (src)
1793 1791 *src = ZPROP_SRC_TEMPORARY;
1794 1792 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
1795 1793 *val = B_FALSE;
1796 1794 if (src)
1797 1795 *src = ZPROP_SRC_TEMPORARY;
1798 1796 }
1799 1797 break;
1800 1798
1801 1799 case ZFS_PROP_CANMOUNT:
1802 1800 case ZFS_PROP_VOLSIZE:
1803 1801 case ZFS_PROP_QUOTA:
1804 1802 case ZFS_PROP_REFQUOTA:
1805 1803 case ZFS_PROP_RESERVATION:
1806 1804 case ZFS_PROP_REFRESERVATION:
1807 1805 *val = getprop_uint64(zhp, prop, source);
1808 1806
1809 1807 if (*source == NULL) {
1810 1808 /* not default, must be local */
1811 1809 *source = zhp->zfs_name;
1812 1810 }
1813 1811 break;
1814 1812
1815 1813 case ZFS_PROP_MOUNTED:
1816 1814 *val = (zhp->zfs_mntopts != NULL);
1817 1815 break;
1818 1816
1819 1817 case ZFS_PROP_NUMCLONES:
1820 1818 *val = zhp->zfs_dmustats.dds_num_clones;
1821 1819 break;
1822 1820
1823 1821 case ZFS_PROP_VERSION:
1824 1822 case ZFS_PROP_NORMALIZE:
1825 1823 case ZFS_PROP_UTF8ONLY:
1826 1824 case ZFS_PROP_CASE:
1827 1825 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
1828 1826 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
1829 1827 return (-1);
1830 1828 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1831 1829 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
1832 1830 zcmd_free_nvlists(&zc);
1833 1831 return (-1);
1834 1832 }
1835 1833 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
1836 1834 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
1837 1835 val) != 0) {
1838 1836 zcmd_free_nvlists(&zc);
1839 1837 return (-1);
1840 1838 }
1841 1839 if (zplprops)
1842 1840 nvlist_free(zplprops);
1843 1841 zcmd_free_nvlists(&zc);
1844 1842 break;
1845 1843
1846 1844 case ZFS_PROP_INCONSISTENT:
1847 1845 *val = zhp->zfs_dmustats.dds_inconsistent;
1848 1846 break;
1849 1847
1850 1848 default:
1851 1849 switch (zfs_prop_get_type(prop)) {
1852 1850 case PROP_TYPE_NUMBER:
1853 1851 case PROP_TYPE_INDEX:
1854 1852 *val = getprop_uint64(zhp, prop, source);
1855 1853 /*
1856 1854 * If we tried to use a default value for a
1857 1855 * readonly property, it means that it was not
1858 1856 * present.
1859 1857 */
1860 1858 if (zfs_prop_readonly(prop) &&
1861 1859 *source != NULL && (*source)[0] == '\0') {
1862 1860 *source = NULL;
1863 1861 }
1864 1862 break;
1865 1863
1866 1864 case PROP_TYPE_STRING:
1867 1865 default:
1868 1866 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
1869 1867 "cannot get non-numeric property"));
1870 1868 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
1871 1869 dgettext(TEXT_DOMAIN, "internal error")));
1872 1870 }
1873 1871 }
1874 1872
1875 1873 return (0);
1876 1874 }
1877 1875
1878 1876 /*
1879 1877 * Calculate the source type, given the raw source string.
1880 1878 */
1881 1879 static void
1882 1880 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
1883 1881 char *statbuf, size_t statlen)
1884 1882 {
1885 1883 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
1886 1884 return;
1887 1885
1888 1886 if (source == NULL) {
1889 1887 *srctype = ZPROP_SRC_NONE;
1890 1888 } else if (source[0] == '\0') {
1891 1889 *srctype = ZPROP_SRC_DEFAULT;
1892 1890 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
1893 1891 *srctype = ZPROP_SRC_RECEIVED;
1894 1892 } else {
1895 1893 if (strcmp(source, zhp->zfs_name) == 0) {
1896 1894 *srctype = ZPROP_SRC_LOCAL;
1897 1895 } else {
1898 1896 (void) strlcpy(statbuf, source, statlen);
1899 1897 *srctype = ZPROP_SRC_INHERITED;
1900 1898 }
1901 1899 }
1902 1900
1903 1901 }
1904 1902
1905 1903 int
1906 1904 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
1907 1905 size_t proplen, boolean_t literal)
1908 1906 {
1909 1907 zfs_prop_t prop;
1910 1908 int err = 0;
1911 1909
1912 1910 if (zhp->zfs_recvd_props == NULL)
1913 1911 if (get_recvd_props_ioctl(zhp) != 0)
1914 1912 return (-1);
1915 1913
1916 1914 prop = zfs_name_to_prop(propname);
1917 1915
1918 1916 if (prop != ZPROP_INVAL) {
1919 1917 uint64_t cookie;
1920 1918 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
1921 1919 return (-1);
1922 1920 zfs_set_recvd_props_mode(zhp, &cookie);
1923 1921 err = zfs_prop_get(zhp, prop, propbuf, proplen,
1924 1922 NULL, NULL, 0, literal);
1925 1923 zfs_unset_recvd_props_mode(zhp, &cookie);
1926 1924 } else {
1927 1925 nvlist_t *propval;
1928 1926 char *recvdval;
1929 1927 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
1930 1928 propname, &propval) != 0)
1931 1929 return (-1);
1932 1930 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
1933 1931 &recvdval) == 0);
1934 1932 (void) strlcpy(propbuf, recvdval, proplen);
1935 1933 }
1936 1934
1937 1935 return (err == 0 ? 0 : -1);
1938 1936 }
1939 1937
1940 1938 static int
1941 1939 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
1942 1940 {
1943 1941 nvlist_t *value;
1944 1942 nvpair_t *pair;
1945 1943
1946 1944 value = zfs_get_clones_nvl(zhp);
1947 1945 if (value == NULL)
1948 1946 return (-1);
1949 1947
1950 1948 propbuf[0] = '\0';
1951 1949 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
1952 1950 pair = nvlist_next_nvpair(value, pair)) {
1953 1951 if (propbuf[0] != '\0')
1954 1952 (void) strlcat(propbuf, ",", proplen);
1955 1953 (void) strlcat(propbuf, nvpair_name(pair), proplen);
1956 1954 }
1957 1955
1958 1956 return (0);
1959 1957 }
1960 1958
1961 1959 struct get_clones_arg {
1962 1960 uint64_t numclones;
1963 1961 nvlist_t *value;
1964 1962 const char *origin;
1965 1963 char buf[ZFS_MAXNAMELEN];
1966 1964 };
1967 1965
1968 1966 int
1969 1967 get_clones_cb(zfs_handle_t *zhp, void *arg)
1970 1968 {
1971 1969 struct get_clones_arg *gca = arg;
1972 1970
1973 1971 if (gca->numclones == 0) {
1974 1972 zfs_close(zhp);
1975 1973 return (0);
1976 1974 }
1977 1975
1978 1976 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
1979 1977 NULL, NULL, 0, B_TRUE) != 0)
1980 1978 goto out;
1981 1979 if (strcmp(gca->buf, gca->origin) == 0) {
1982 1980 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
1983 1981 gca->numclones--;
1984 1982 }
1985 1983
1986 1984 out:
1987 1985 (void) zfs_iter_children(zhp, get_clones_cb, gca);
1988 1986 zfs_close(zhp);
1989 1987 return (0);
1990 1988 }
1991 1989
1992 1990 nvlist_t *
1993 1991 zfs_get_clones_nvl(zfs_handle_t *zhp)
1994 1992 {
1995 1993 nvlist_t *nv, *value;
1996 1994
1997 1995 if (nvlist_lookup_nvlist(zhp->zfs_props,
1998 1996 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
1999 1997 struct get_clones_arg gca;
2000 1998
2001 1999 /*
2002 2000 * if this is a snapshot, then the kernel wasn't able
2003 2001 * to get the clones. Do it by slowly iterating.
2004 2002 */
2005 2003 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2006 2004 return (NULL);
2007 2005 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2008 2006 return (NULL);
2009 2007 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2010 2008 nvlist_free(nv);
2011 2009 return (NULL);
2012 2010 }
2013 2011
2014 2012 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2015 2013 gca.value = value;
2016 2014 gca.origin = zhp->zfs_name;
2017 2015
2018 2016 if (gca.numclones != 0) {
2019 2017 zfs_handle_t *root;
2020 2018 char pool[ZFS_MAXNAMELEN];
2021 2019 char *cp = pool;
2022 2020
2023 2021 /* get the pool name */
2024 2022 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2025 2023 (void) strsep(&cp, "/@");
2026 2024 root = zfs_open(zhp->zfs_hdl, pool,
2027 2025 ZFS_TYPE_FILESYSTEM);
2028 2026
2029 2027 (void) get_clones_cb(root, &gca);
2030 2028 }
2031 2029
2032 2030 if (gca.numclones != 0 ||
2033 2031 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2034 2032 nvlist_add_nvlist(zhp->zfs_props,
2035 2033 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2036 2034 nvlist_free(nv);
2037 2035 nvlist_free(value);
2038 2036 return (NULL);
2039 2037 }
2040 2038 nvlist_free(nv);
2041 2039 nvlist_free(value);
2042 2040 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2043 2041 zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2044 2042 }
2045 2043
2046 2044 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2047 2045
2048 2046 return (value);
2049 2047 }
2050 2048
2051 2049 /*
2052 2050 * Retrieve a property from the given object. If 'literal' is specified, then
2053 2051 * numbers are left as exact values. Otherwise, numbers are converted to a
2054 2052 * human-readable form.
2055 2053 *
2056 2054 * Returns 0 on success, or -1 on error.
2057 2055 */
2058 2056 int
2059 2057 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2060 2058 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2061 2059 {
2062 2060 char *source = NULL;
2063 2061 uint64_t val;
2064 2062 char *str;
2065 2063 const char *strval;
2066 2064 boolean_t received = zfs_is_recvd_props_mode(zhp);
2067 2065
2068 2066 /*
2069 2067 * Check to see if this property applies to our object
2070 2068 */
2071 2069 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2072 2070 return (-1);
2073 2071
2074 2072 if (received && zfs_prop_readonly(prop))
2075 2073 return (-1);
2076 2074
2077 2075 if (src)
2078 2076 *src = ZPROP_SRC_NONE;
2079 2077
2080 2078 switch (prop) {
2081 2079 case ZFS_PROP_CREATION:
2082 2080 /*
2083 2081 * 'creation' is a time_t stored in the statistics. We convert
2084 2082 * this into a string unless 'literal' is specified.
2085 2083 */
2086 2084 {
2087 2085 val = getprop_uint64(zhp, prop, &source);
2088 2086 time_t time = (time_t)val;
2089 2087 struct tm t;
2090 2088
2091 2089 if (literal ||
2092 2090 localtime_r(&time, &t) == NULL ||
2093 2091 strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2094 2092 &t) == 0)
2095 2093 (void) snprintf(propbuf, proplen, "%llu", val);
2096 2094 }
2097 2095 break;
2098 2096
2099 2097 case ZFS_PROP_MOUNTPOINT:
2100 2098 /*
2101 2099 * Getting the precise mountpoint can be tricky.
2102 2100 *
2103 2101 * - for 'none' or 'legacy', return those values.
2104 2102 * - for inherited mountpoints, we want to take everything
2105 2103 * after our ancestor and append it to the inherited value.
2106 2104 *
2107 2105 * If the pool has an alternate root, we want to prepend that
2108 2106 * root to any values we return.
2109 2107 */
2110 2108
2111 2109 str = getprop_string(zhp, prop, &source);
2112 2110
2113 2111 if (str[0] == '/') {
2114 2112 char buf[MAXPATHLEN];
2115 2113 char *root = buf;
2116 2114 const char *relpath;
2117 2115
2118 2116 /*
2119 2117 * If we inherit the mountpoint, even from a dataset
2120 2118 * with a received value, the source will be the path of
2121 2119 * the dataset we inherit from. If source is
2122 2120 * ZPROP_SOURCE_VAL_RECVD, the received value is not
2123 2121 * inherited.
2124 2122 */
2125 2123 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2126 2124 relpath = "";
2127 2125 } else {
2128 2126 relpath = zhp->zfs_name + strlen(source);
2129 2127 if (relpath[0] == '/')
2130 2128 relpath++;
2131 2129 }
2132 2130
2133 2131 if ((zpool_get_prop(zhp->zpool_hdl,
2134 2132 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL)) ||
2135 2133 (strcmp(root, "-") == 0))
2136 2134 root[0] = '\0';
2137 2135 /*
2138 2136 * Special case an alternate root of '/'. This will
2139 2137 * avoid having multiple leading slashes in the
2140 2138 * mountpoint path.
2141 2139 */
2142 2140 if (strcmp(root, "/") == 0)
2143 2141 root++;
2144 2142
2145 2143 /*
2146 2144 * If the mountpoint is '/' then skip over this
2147 2145 * if we are obtaining either an alternate root or
2148 2146 * an inherited mountpoint.
2149 2147 */
2150 2148 if (str[1] == '\0' && (root[0] != '\0' ||
2151 2149 relpath[0] != '\0'))
2152 2150 str++;
2153 2151
2154 2152 if (relpath[0] == '\0')
2155 2153 (void) snprintf(propbuf, proplen, "%s%s",
2156 2154 root, str);
2157 2155 else
2158 2156 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2159 2157 root, str, relpath[0] == '@' ? "" : "/",
2160 2158 relpath);
2161 2159 } else {
2162 2160 /* 'legacy' or 'none' */
2163 2161 (void) strlcpy(propbuf, str, proplen);
2164 2162 }
2165 2163
2166 2164 break;
2167 2165
2168 2166 case ZFS_PROP_ORIGIN:
2169 2167 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source),
2170 2168 proplen);
2171 2169 /*
2172 2170 * If there is no parent at all, return failure to indicate that
2173 2171 * it doesn't apply to this dataset.
2174 2172 */
2175 2173 if (propbuf[0] == '\0')
2176 2174 return (-1);
2177 2175 break;
2178 2176
2179 2177 case ZFS_PROP_CLONES:
2180 2178 if (get_clones_string(zhp, propbuf, proplen) != 0)
2181 2179 return (-1);
2182 2180 break;
2183 2181
2184 2182 case ZFS_PROP_QUOTA:
2185 2183 case ZFS_PROP_REFQUOTA:
2186 2184 case ZFS_PROP_RESERVATION:
2187 2185 case ZFS_PROP_REFRESERVATION:
2188 2186
2189 2187 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2190 2188 return (-1);
2191 2189
2192 2190 /*
2193 2191 * If quota or reservation is 0, we translate this into 'none'
2194 2192 * (unless literal is set), and indicate that it's the default
2195 2193 * value. Otherwise, we print the number nicely and indicate
2196 2194 * that its set locally.
2197 2195 */
2198 2196 if (val == 0) {
2199 2197 if (literal)
2200 2198 (void) strlcpy(propbuf, "0", proplen);
2201 2199 else
2202 2200 (void) strlcpy(propbuf, "none", proplen);
2203 2201 } else {
2204 2202 if (literal)
2205 2203 (void) snprintf(propbuf, proplen, "%llu",
2206 2204 (u_longlong_t)val);
2207 2205 else
2208 2206 zfs_nicenum(val, propbuf, proplen);
2209 2207 }
2210 2208 break;
2211 2209
2212 2210 case ZFS_PROP_REFRATIO:
2213 2211 case ZFS_PROP_COMPRESSRATIO:
2214 2212 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2215 2213 return (-1);
2216 2214 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2217 2215 (u_longlong_t)(val / 100),
2218 2216 (u_longlong_t)(val % 100));
2219 2217 break;
2220 2218
2221 2219 case ZFS_PROP_TYPE:
2222 2220 switch (zhp->zfs_type) {
2223 2221 case ZFS_TYPE_FILESYSTEM:
2224 2222 str = "filesystem";
2225 2223 break;
2226 2224 case ZFS_TYPE_VOLUME:
2227 2225 str = "volume";
2228 2226 break;
2229 2227 case ZFS_TYPE_SNAPSHOT:
2230 2228 str = "snapshot";
2231 2229 break;
2232 2230 default:
2233 2231 abort();
2234 2232 }
2235 2233 (void) snprintf(propbuf, proplen, "%s", str);
2236 2234 break;
2237 2235
2238 2236 case ZFS_PROP_MOUNTED:
2239 2237 /*
2240 2238 * The 'mounted' property is a pseudo-property that described
2241 2239 * whether the filesystem is currently mounted. Even though
2242 2240 * it's a boolean value, the typical values of "on" and "off"
2243 2241 * don't make sense, so we translate to "yes" and "no".
2244 2242 */
2245 2243 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2246 2244 src, &source, &val) != 0)
2247 2245 return (-1);
2248 2246 if (val)
2249 2247 (void) strlcpy(propbuf, "yes", proplen);
2250 2248 else
2251 2249 (void) strlcpy(propbuf, "no", proplen);
2252 2250 break;
2253 2251
2254 2252 case ZFS_PROP_NAME:
2255 2253 /*
2256 2254 * The 'name' property is a pseudo-property derived from the
2257 2255 * dataset name. It is presented as a real property to simplify
2258 2256 * consumers.
2259 2257 */
2260 2258 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2261 2259 break;
2262 2260
2263 2261 case ZFS_PROP_MLSLABEL:
2264 2262 {
2265 2263 m_label_t *new_sl = NULL;
2266 2264 char *ascii = NULL; /* human readable label */
2267 2265
2268 2266 (void) strlcpy(propbuf,
2269 2267 getprop_string(zhp, prop, &source), proplen);
2270 2268
2271 2269 if (literal || (strcasecmp(propbuf,
2272 2270 ZFS_MLSLABEL_DEFAULT) == 0))
2273 2271 break;
2274 2272
2275 2273 /*
2276 2274 * Try to translate the internal hex string to
2277 2275 * human-readable output. If there are any
2278 2276 * problems just use the hex string.
2279 2277 */
2280 2278
2281 2279 if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2282 2280 L_NO_CORRECTION, NULL) == -1) {
2283 2281 m_label_free(new_sl);
2284 2282 break;
2285 2283 }
2286 2284
2287 2285 if (label_to_str(new_sl, &ascii, M_LABEL,
2288 2286 DEF_NAMES) != 0) {
2289 2287 if (ascii)
2290 2288 free(ascii);
2291 2289 m_label_free(new_sl);
2292 2290 break;
2293 2291 }
2294 2292 m_label_free(new_sl);
2295 2293
2296 2294 (void) strlcpy(propbuf, ascii, proplen);
2297 2295 free(ascii);
2298 2296 }
2299 2297 break;
2300 2298
2301 2299 case ZFS_PROP_GUID:
2302 2300 /*
2303 2301 * GUIDs are stored as numbers, but they are identifiers.
2304 2302 * We don't want them to be pretty printed, because pretty
2305 2303 * printing mangles the ID into a truncated and useless value.
2306 2304 */
2307 2305 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2308 2306 return (-1);
2309 2307 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2310 2308 break;
2311 2309
2312 2310 default:
2313 2311 switch (zfs_prop_get_type(prop)) {
2314 2312 case PROP_TYPE_NUMBER:
2315 2313 if (get_numeric_property(zhp, prop, src,
2316 2314 &source, &val) != 0)
2317 2315 return (-1);
2318 2316 if (literal)
2319 2317 (void) snprintf(propbuf, proplen, "%llu",
2320 2318 (u_longlong_t)val);
2321 2319 else
2322 2320 zfs_nicenum(val, propbuf, proplen);
2323 2321 break;
2324 2322
2325 2323 case PROP_TYPE_STRING:
2326 2324 (void) strlcpy(propbuf,
2327 2325 getprop_string(zhp, prop, &source), proplen);
2328 2326 break;
2329 2327
2330 2328 case PROP_TYPE_INDEX:
2331 2329 if (get_numeric_property(zhp, prop, src,
2332 2330 &source, &val) != 0)
2333 2331 return (-1);
2334 2332 if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2335 2333 return (-1);
2336 2334 (void) strlcpy(propbuf, strval, proplen);
2337 2335 break;
2338 2336
2339 2337 default:
2340 2338 abort();
2341 2339 }
2342 2340 }
2343 2341
2344 2342 get_source(zhp, src, source, statbuf, statlen);
2345 2343
2346 2344 return (0);
2347 2345 }
2348 2346
2349 2347 /*
2350 2348 * Utility function to get the given numeric property. Does no validation that
2351 2349 * the given property is the appropriate type; should only be used with
2352 2350 * hard-coded property types.
2353 2351 */
2354 2352 uint64_t
2355 2353 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2356 2354 {
2357 2355 char *source;
2358 2356 uint64_t val;
2359 2357
2360 2358 (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2361 2359
2362 2360 return (val);
2363 2361 }
2364 2362
2365 2363 int
2366 2364 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2367 2365 {
2368 2366 char buf[64];
2369 2367
2370 2368 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2371 2369 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2372 2370 }
2373 2371
2374 2372 /*
2375 2373 * Similar to zfs_prop_get(), but returns the value as an integer.
2376 2374 */
2377 2375 int
2378 2376 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2379 2377 zprop_source_t *src, char *statbuf, size_t statlen)
2380 2378 {
2381 2379 char *source;
2382 2380
2383 2381 /*
2384 2382 * Check to see if this property applies to our object
2385 2383 */
2386 2384 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2387 2385 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2388 2386 dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2389 2387 zfs_prop_to_name(prop)));
2390 2388 }
2391 2389
2392 2390 if (src)
2393 2391 *src = ZPROP_SRC_NONE;
2394 2392
2395 2393 if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2396 2394 return (-1);
2397 2395
2398 2396 get_source(zhp, src, source, statbuf, statlen);
2399 2397
2400 2398 return (0);
2401 2399 }
2402 2400
2403 2401 static int
2404 2402 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2405 2403 char **domainp, idmap_rid_t *ridp)
2406 2404 {
2407 2405 idmap_get_handle_t *get_hdl = NULL;
2408 2406 idmap_stat status;
2409 2407 int err = EINVAL;
2410 2408
2411 2409 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2412 2410 goto out;
2413 2411
2414 2412 if (isuser) {
2415 2413 err = idmap_get_sidbyuid(get_hdl, id,
2416 2414 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2417 2415 } else {
2418 2416 err = idmap_get_sidbygid(get_hdl, id,
2419 2417 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2420 2418 }
2421 2419 if (err == IDMAP_SUCCESS &&
2422 2420 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2423 2421 status == IDMAP_SUCCESS)
2424 2422 err = 0;
2425 2423 else
2426 2424 err = EINVAL;
2427 2425 out:
2428 2426 if (get_hdl)
2429 2427 idmap_get_destroy(get_hdl);
2430 2428 return (err);
2431 2429 }
2432 2430
2433 2431 /*
2434 2432 * convert the propname into parameters needed by kernel
2435 2433 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2436 2434 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2437 2435 */
2438 2436 static int
2439 2437 userquota_propname_decode(const char *propname, boolean_t zoned,
2440 2438 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2441 2439 {
2442 2440 zfs_userquota_prop_t type;
2443 2441 char *cp, *end;
2444 2442 char *numericsid = NULL;
2445 2443 boolean_t isuser;
2446 2444
2447 2445 domain[0] = '\0';
2448 2446
2449 2447 /* Figure out the property type ({user|group}{quota|space}) */
2450 2448 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2451 2449 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2452 2450 strlen(zfs_userquota_prop_prefixes[type])) == 0)
2453 2451 break;
2454 2452 }
2455 2453 if (type == ZFS_NUM_USERQUOTA_PROPS)
2456 2454 return (EINVAL);
2457 2455 *typep = type;
2458 2456
2459 2457 isuser = (type == ZFS_PROP_USERQUOTA ||
2460 2458 type == ZFS_PROP_USERUSED);
2461 2459
2462 2460 cp = strchr(propname, '@') + 1;
2463 2461
2464 2462 if (strchr(cp, '@')) {
2465 2463 /*
2466 2464 * It's a SID name (eg "user@domain") that needs to be
2467 2465 * turned into S-1-domainID-RID.
2468 2466 */
2469 2467 directory_error_t e;
2470 2468 if (zoned && getzoneid() == GLOBAL_ZONEID)
2471 2469 return (ENOENT);
2472 2470 if (isuser) {
2473 2471 e = directory_sid_from_user_name(NULL,
2474 2472 cp, &numericsid);
2475 2473 } else {
2476 2474 e = directory_sid_from_group_name(NULL,
2477 2475 cp, &numericsid);
2478 2476 }
2479 2477 if (e != NULL) {
2480 2478 directory_error_free(e);
2481 2479 return (ENOENT);
2482 2480 }
2483 2481 if (numericsid == NULL)
2484 2482 return (ENOENT);
2485 2483 cp = numericsid;
2486 2484 /* will be further decoded below */
2487 2485 }
2488 2486
2489 2487 if (strncmp(cp, "S-1-", 4) == 0) {
2490 2488 /* It's a numeric SID (eg "S-1-234-567-89") */
2491 2489 (void) strlcpy(domain, cp, domainlen);
2492 2490 cp = strrchr(domain, '-');
2493 2491 *cp = '\0';
2494 2492 cp++;
2495 2493
2496 2494 errno = 0;
2497 2495 *ridp = strtoull(cp, &end, 10);
2498 2496 if (numericsid) {
2499 2497 free(numericsid);
2500 2498 numericsid = NULL;
2501 2499 }
2502 2500 if (errno != 0 || *end != '\0')
2503 2501 return (EINVAL);
2504 2502 } else if (!isdigit(*cp)) {
2505 2503 /*
2506 2504 * It's a user/group name (eg "user") that needs to be
2507 2505 * turned into a uid/gid
2508 2506 */
2509 2507 if (zoned && getzoneid() == GLOBAL_ZONEID)
2510 2508 return (ENOENT);
2511 2509 if (isuser) {
2512 2510 struct passwd *pw;
2513 2511 pw = getpwnam(cp);
2514 2512 if (pw == NULL)
2515 2513 return (ENOENT);
2516 2514 *ridp = pw->pw_uid;
2517 2515 } else {
2518 2516 struct group *gr;
2519 2517 gr = getgrnam(cp);
2520 2518 if (gr == NULL)
2521 2519 return (ENOENT);
2522 2520 *ridp = gr->gr_gid;
2523 2521 }
2524 2522 } else {
2525 2523 /* It's a user/group ID (eg "12345"). */
2526 2524 uid_t id = strtoul(cp, &end, 10);
2527 2525 idmap_rid_t rid;
2528 2526 char *mapdomain;
2529 2527
2530 2528 if (*end != '\0')
2531 2529 return (EINVAL);
2532 2530 if (id > MAXUID) {
2533 2531 /* It's an ephemeral ID. */
2534 2532 if (idmap_id_to_numeric_domain_rid(id, isuser,
2535 2533 &mapdomain, &rid) != 0)
2536 2534 return (ENOENT);
2537 2535 (void) strlcpy(domain, mapdomain, domainlen);
2538 2536 *ridp = rid;
2539 2537 } else {
2540 2538 *ridp = id;
2541 2539 }
2542 2540 }
2543 2541
2544 2542 ASSERT3P(numericsid, ==, NULL);
2545 2543 return (0);
2546 2544 }
2547 2545
2548 2546 static int
2549 2547 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2550 2548 uint64_t *propvalue, zfs_userquota_prop_t *typep)
2551 2549 {
2552 2550 int err;
2553 2551 zfs_cmd_t zc = { 0 };
2554 2552
2555 2553 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2556 2554
2557 2555 err = userquota_propname_decode(propname,
2558 2556 zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2559 2557 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2560 2558 zc.zc_objset_type = *typep;
2561 2559 if (err)
2562 2560 return (err);
2563 2561
2564 2562 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2565 2563 if (err)
2566 2564 return (err);
2567 2565
2568 2566 *propvalue = zc.zc_cookie;
2569 2567 return (0);
2570 2568 }
2571 2569
2572 2570 int
2573 2571 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2574 2572 uint64_t *propvalue)
2575 2573 {
2576 2574 zfs_userquota_prop_t type;
2577 2575
2578 2576 return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2579 2577 &type));
2580 2578 }
2581 2579
2582 2580 int
2583 2581 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2584 2582 char *propbuf, int proplen, boolean_t literal)
2585 2583 {
2586 2584 int err;
2587 2585 uint64_t propvalue;
2588 2586 zfs_userquota_prop_t type;
2589 2587
2590 2588 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2591 2589 &type);
2592 2590
2593 2591 if (err)
2594 2592 return (err);
2595 2593
2596 2594 if (literal) {
2597 2595 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2598 2596 } else if (propvalue == 0 &&
2599 2597 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2600 2598 (void) strlcpy(propbuf, "none", proplen);
2601 2599 } else {
2602 2600 zfs_nicenum(propvalue, propbuf, proplen);
2603 2601 }
2604 2602 return (0);
2605 2603 }
2606 2604
2607 2605 int
2608 2606 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2609 2607 uint64_t *propvalue)
2610 2608 {
2611 2609 int err;
2612 2610 zfs_cmd_t zc = { 0 };
2613 2611 const char *snapname;
2614 2612
2615 2613 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2616 2614
2617 2615 snapname = strchr(propname, '@') + 1;
2618 2616 if (strchr(snapname, '@')) {
2619 2617 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2620 2618 } else {
2621 2619 /* snapname is the short name, append it to zhp's fsname */
2622 2620 char *cp;
2623 2621
2624 2622 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2625 2623 sizeof (zc.zc_value));
2626 2624 cp = strchr(zc.zc_value, '@');
2627 2625 if (cp != NULL)
2628 2626 *cp = '\0';
2629 2627 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2630 2628 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2631 2629 }
2632 2630
2633 2631 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2634 2632 if (err)
2635 2633 return (err);
2636 2634
2637 2635 *propvalue = zc.zc_cookie;
2638 2636 return (0);
2639 2637 }
2640 2638
2641 2639 int
2642 2640 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2643 2641 char *propbuf, int proplen, boolean_t literal)
2644 2642 {
2645 2643 int err;
2646 2644 uint64_t propvalue;
2647 2645
2648 2646 err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2649 2647
2650 2648 if (err)
2651 2649 return (err);
2652 2650
2653 2651 if (literal) {
2654 2652 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2655 2653 } else {
2656 2654 zfs_nicenum(propvalue, propbuf, proplen);
2657 2655 }
2658 2656 return (0);
2659 2657 }
2660 2658
2661 2659 /*
2662 2660 * Returns the name of the given zfs handle.
2663 2661 */
2664 2662 const char *
2665 2663 zfs_get_name(const zfs_handle_t *zhp)
2666 2664 {
2667 2665 return (zhp->zfs_name);
2668 2666 }
2669 2667
2670 2668 /*
2671 2669 * Returns the type of the given zfs handle.
2672 2670 */
2673 2671 zfs_type_t
2674 2672 zfs_get_type(const zfs_handle_t *zhp)
2675 2673 {
2676 2674 return (zhp->zfs_type);
2677 2675 }
2678 2676
2679 2677 /*
2680 2678 * Is one dataset name a child dataset of another?
2681 2679 *
2682 2680 * Needs to handle these cases:
2683 2681 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo"
2684 2682 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar"
2685 2683 * Descendant? No. No. No. Yes.
2686 2684 */
2687 2685 static boolean_t
2688 2686 is_descendant(const char *ds1, const char *ds2)
2689 2687 {
2690 2688 size_t d1len = strlen(ds1);
2691 2689
2692 2690 /* ds2 can't be a descendant if it's smaller */
2693 2691 if (strlen(ds2) < d1len)
2694 2692 return (B_FALSE);
2695 2693
2696 2694 /* otherwise, compare strings and verify that there's a '/' char */
2697 2695 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2698 2696 }
2699 2697
2700 2698 /*
2701 2699 * Given a complete name, return just the portion that refers to the parent.
2702 2700 * Will return -1 if there is no parent (path is just the name of the
2703 2701 * pool).
2704 2702 */
2705 2703 static int
2706 2704 parent_name(const char *path, char *buf, size_t buflen)
2707 2705 {
2708 2706 char *slashp;
2709 2707
2710 2708 (void) strlcpy(buf, path, buflen);
2711 2709
2712 2710 if ((slashp = strrchr(buf, '/')) == NULL)
2713 2711 return (-1);
2714 2712 *slashp = '\0';
2715 2713
2716 2714 return (0);
2717 2715 }
2718 2716
2719 2717 /*
2720 2718 * If accept_ancestor is false, then check to make sure that the given path has
2721 2719 * a parent, and that it exists. If accept_ancestor is true, then find the
2722 2720 * closest existing ancestor for the given path. In prefixlen return the
2723 2721 * length of already existing prefix of the given path. We also fetch the
2724 2722 * 'zoned' property, which is used to validate property settings when creating
2725 2723 * new datasets.
2726 2724 */
2727 2725 static int
2728 2726 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
2729 2727 boolean_t accept_ancestor, int *prefixlen)
2730 2728 {
2731 2729 zfs_cmd_t zc = { 0 };
2732 2730 char parent[ZFS_MAXNAMELEN];
2733 2731 char *slash;
2734 2732 zfs_handle_t *zhp;
2735 2733 char errbuf[1024];
2736 2734 uint64_t is_zoned;
2737 2735
2738 2736 (void) snprintf(errbuf, sizeof (errbuf),
2739 2737 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
2740 2738
2741 2739 /* get parent, and check to see if this is just a pool */
2742 2740 if (parent_name(path, parent, sizeof (parent)) != 0) {
2743 2741 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2744 2742 "missing dataset name"));
2745 2743 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2746 2744 }
2747 2745
2748 2746 /* check to see if the pool exists */
2749 2747 if ((slash = strchr(parent, '/')) == NULL)
2750 2748 slash = parent + strlen(parent);
2751 2749 (void) strncpy(zc.zc_name, parent, slash - parent);
2752 2750 zc.zc_name[slash - parent] = '\0';
2753 2751 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
2754 2752 errno == ENOENT) {
2755 2753 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2756 2754 "no such pool '%s'"), zc.zc_name);
2757 2755 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2758 2756 }
2759 2757
2760 2758 /* check to see if the parent dataset exists */
2761 2759 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
2762 2760 if (errno == ENOENT && accept_ancestor) {
2763 2761 /*
2764 2762 * Go deeper to find an ancestor, give up on top level.
2765 2763 */
2766 2764 if (parent_name(parent, parent, sizeof (parent)) != 0) {
2767 2765 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2768 2766 "no such pool '%s'"), zc.zc_name);
2769 2767 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2770 2768 }
2771 2769 } else if (errno == ENOENT) {
2772 2770 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2773 2771 "parent does not exist"));
2774 2772 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2775 2773 } else
2776 2774 return (zfs_standard_error(hdl, errno, errbuf));
2777 2775 }
2778 2776
2779 2777 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2780 2778 if (zoned != NULL)
2781 2779 *zoned = is_zoned;
2782 2780
2783 2781 /* we are in a non-global zone, but parent is in the global zone */
2784 2782 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
2785 2783 (void) zfs_standard_error(hdl, EPERM, errbuf);
2786 2784 zfs_close(zhp);
2787 2785 return (-1);
2788 2786 }
2789 2787
2790 2788 /* make sure parent is a filesystem */
2791 2789 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
2792 2790 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2793 2791 "parent is not a filesystem"));
2794 2792 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
2795 2793 zfs_close(zhp);
2796 2794 return (-1);
2797 2795 }
2798 2796
2799 2797 zfs_close(zhp);
2800 2798 if (prefixlen != NULL)
2801 2799 *prefixlen = strlen(parent);
2802 2800 return (0);
2803 2801 }
2804 2802
2805 2803 /*
2806 2804 * Finds whether the dataset of the given type(s) exists.
2807 2805 */
2808 2806 boolean_t
2809 2807 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
2810 2808 {
2811 2809 zfs_handle_t *zhp;
2812 2810
2813 2811 if (!zfs_validate_name(hdl, path, types, B_FALSE))
2814 2812 return (B_FALSE);
2815 2813
2816 2814 /*
2817 2815 * Try to get stats for the dataset, which will tell us if it exists.
2818 2816 */
2819 2817 if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
2820 2818 int ds_type = zhp->zfs_type;
2821 2819
2822 2820 zfs_close(zhp);
2823 2821 if (types & ds_type)
2824 2822 return (B_TRUE);
2825 2823 }
2826 2824 return (B_FALSE);
2827 2825 }
2828 2826
2829 2827 /*
2830 2828 * Given a path to 'target', create all the ancestors between
2831 2829 * the prefixlen portion of the path, and the target itself.
2832 2830 * Fail if the initial prefixlen-ancestor does not already exist.
2833 2831 */
2834 2832 int
2835 2833 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
2836 2834 {
2837 2835 zfs_handle_t *h;
2838 2836 char *cp;
2839 2837 const char *opname;
2840 2838
2841 2839 /* make sure prefix exists */
2842 2840 cp = target + prefixlen;
2843 2841 if (*cp != '/') {
2844 2842 assert(strchr(cp, '/') == NULL);
2845 2843 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2846 2844 } else {
2847 2845 *cp = '\0';
2848 2846 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2849 2847 *cp = '/';
2850 2848 }
2851 2849 if (h == NULL)
2852 2850 return (-1);
2853 2851 zfs_close(h);
2854 2852
2855 2853 /*
2856 2854 * Attempt to create, mount, and share any ancestor filesystems,
2857 2855 * up to the prefixlen-long one.
2858 2856 */
2859 2857 for (cp = target + prefixlen + 1;
2860 2858 cp = strchr(cp, '/'); *cp = '/', cp++) {
2861 2859
2862 2860 *cp = '\0';
2863 2861
2864 2862 h = make_dataset_handle(hdl, target);
2865 2863 if (h) {
2866 2864 /* it already exists, nothing to do here */
2867 2865 zfs_close(h);
2868 2866 continue;
2869 2867 }
2870 2868
2871 2869 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
2872 2870 NULL) != 0) {
2873 2871 opname = dgettext(TEXT_DOMAIN, "create");
2874 2872 goto ancestorerr;
2875 2873 }
2876 2874
2877 2875 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2878 2876 if (h == NULL) {
2879 2877 opname = dgettext(TEXT_DOMAIN, "open");
2880 2878 goto ancestorerr;
2881 2879 }
2882 2880
2883 2881 if (zfs_mount(h, NULL, 0) != 0) {
2884 2882 opname = dgettext(TEXT_DOMAIN, "mount");
2885 2883 goto ancestorerr;
2886 2884 }
2887 2885
2888 2886 if (zfs_share(h) != 0) {
2889 2887 opname = dgettext(TEXT_DOMAIN, "share");
2890 2888 goto ancestorerr;
2891 2889 }
2892 2890
2893 2891 zfs_close(h);
2894 2892 }
2895 2893
2896 2894 return (0);
2897 2895
2898 2896 ancestorerr:
2899 2897 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2900 2898 "failed to %s ancestor '%s'"), opname, target);
2901 2899 return (-1);
2902 2900 }
2903 2901
2904 2902 /*
2905 2903 * Creates non-existing ancestors of the given path.
2906 2904 */
2907 2905 int
2908 2906 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
2909 2907 {
2910 2908 int prefix;
2911 2909 char *path_copy;
2912 2910 int rc;
2913 2911
2914 2912 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
2915 2913 return (-1);
2916 2914
2917 2915 if ((path_copy = strdup(path)) != NULL) {
2918 2916 rc = create_parents(hdl, path_copy, prefix);
2919 2917 free(path_copy);
2920 2918 }
2921 2919 if (path_copy == NULL || rc != 0)
2922 2920 return (-1);
2923 2921
2924 2922 return (0);
2925 2923 }
2926 2924
2927 2925 /*
2928 2926 * Create a new filesystem or volume.
2929 2927 */
2930 2928 int
2931 2929 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
2932 2930 nvlist_t *props)
2933 2931 {
2934 2932 int ret;
2935 2933 uint64_t size = 0;
2936 2934 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
2937 2935 char errbuf[1024];
2938 2936 uint64_t zoned;
2939 2937 dmu_objset_type_t ost;
2940 2938
2941 2939 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2942 2940 "cannot create '%s'"), path);
2943 2941
2944 2942 /* validate the path, taking care to note the extended error message */
2945 2943 if (!zfs_validate_name(hdl, path, type, B_TRUE))
2946 2944 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2947 2945
2948 2946 /* validate parents exist */
2949 2947 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
2950 2948 return (-1);
2951 2949
2952 2950 /*
2953 2951 * The failure modes when creating a dataset of a different type over
2954 2952 * one that already exists is a little strange. In particular, if you
2955 2953 * try to create a dataset on top of an existing dataset, the ioctl()
2956 2954 * will return ENOENT, not EEXIST. To prevent this from happening, we
2957 2955 * first try to see if the dataset exists.
2958 2956 */
2959 2957 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
2960 2958 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2961 2959 "dataset already exists"));
2962 2960 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
2963 2961 }
2964 2962
2965 2963 if (type == ZFS_TYPE_VOLUME)
2966 2964 ost = DMU_OST_ZVOL;
2967 2965 else
2968 2966 ost = DMU_OST_ZFS;
2969 2967
2970 2968 if (props && (props = zfs_valid_proplist(hdl, type, props,
2971 2969 zoned, NULL, errbuf)) == 0)
2972 2970 return (-1);
2973 2971
2974 2972 if (type == ZFS_TYPE_VOLUME) {
2975 2973 /*
2976 2974 * If we are creating a volume, the size and block size must
2977 2975 * satisfy a few restraints. First, the blocksize must be a
2978 2976 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the
2979 2977 * volsize must be a multiple of the block size, and cannot be
2980 2978 * zero.
2981 2979 */
2982 2980 if (props == NULL || nvlist_lookup_uint64(props,
2983 2981 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
2984 2982 nvlist_free(props);
2985 2983 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2986 2984 "missing volume size"));
2987 2985 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2988 2986 }
2989 2987
2990 2988 if ((ret = nvlist_lookup_uint64(props,
2991 2989 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
2992 2990 &blocksize)) != 0) {
2993 2991 if (ret == ENOENT) {
2994 2992 blocksize = zfs_prop_default_numeric(
2995 2993 ZFS_PROP_VOLBLOCKSIZE);
2996 2994 } else {
2997 2995 nvlist_free(props);
2998 2996 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2999 2997 "missing volume block size"));
3000 2998 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3001 2999 }
3002 3000 }
3003 3001
3004 3002 if (size == 0) {
3005 3003 nvlist_free(props);
3006 3004 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3007 3005 "volume size cannot be zero"));
3008 3006 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3009 3007 }
3010 3008
3011 3009 if (size % blocksize != 0) {
3012 3010 nvlist_free(props);
3013 3011 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3014 3012 "volume size must be a multiple of volume block "
3015 3013 "size"));
3016 3014 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3017 3015 }
3018 3016 }
3019 3017
3020 3018 /* create the dataset */
3021 3019 ret = lzc_create(path, ost, props);
3022 3020 nvlist_free(props);
3023 3021
3024 3022 /* check for failure */
3025 3023 if (ret != 0) {
3026 3024 char parent[ZFS_MAXNAMELEN];
3027 3025 (void) parent_name(path, parent, sizeof (parent));
3028 3026
3029 3027 switch (errno) {
3030 3028 case ENOENT:
3031 3029 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3032 3030 "no such parent '%s'"), parent);
3033 3031 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3034 3032
3035 3033 case EINVAL:
3036 3034 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3037 3035 "parent '%s' is not a filesystem"), parent);
3038 3036 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3039 3037
3040 3038 case EDOM:
3041 3039 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3042 3040 "volume block size must be power of 2 from "
3043 3041 "%u to %uk"),
3044 3042 (uint_t)SPA_MINBLOCKSIZE,
3045 3043 (uint_t)SPA_MAXBLOCKSIZE >> 10);
3046 3044
3047 3045 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3048 3046
3049 3047 case ENOTSUP:
3050 3048 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3051 3049 "pool must be upgraded to set this "
3052 3050 "property or value"));
3053 3051 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3054 3052 #ifdef _ILP32
3055 3053 case EOVERFLOW:
3056 3054 /*
3057 3055 * This platform can't address a volume this big.
3058 3056 */
3059 3057 if (type == ZFS_TYPE_VOLUME)
3060 3058 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3061 3059 errbuf));
3062 3060 #endif
3063 3061 /* FALLTHROUGH */
3064 3062 default:
3065 3063 return (zfs_standard_error(hdl, errno, errbuf));
3066 3064 }
3067 3065 }
3068 3066
3069 3067 return (0);
3070 3068 }
3071 3069
3072 3070 /*
3073 3071 * Destroys the given dataset. The caller must make sure that the filesystem
3074 3072 * isn't mounted, and that there are no active dependents. If the file system
3075 3073 * does not exist this function does nothing.
3076 3074 */
3077 3075 int
3078 3076 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3079 3077 {
3080 3078 zfs_cmd_t zc = { 0 };
3081 3079
3082 3080 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3083 3081
3084 3082 if (ZFS_IS_VOLUME(zhp)) {
3085 3083 zc.zc_objset_type = DMU_OST_ZVOL;
3086 3084 } else {
3087 3085 zc.zc_objset_type = DMU_OST_ZFS;
3088 3086 }
3089 3087
3090 3088 zc.zc_defer_destroy = defer;
3091 3089 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3092 3090 errno != ENOENT) {
3093 3091 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3094 3092 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3095 3093 zhp->zfs_name));
3096 3094 }
3097 3095
3098 3096 remove_mountpoint(zhp);
3099 3097
3100 3098 return (0);
3101 3099 }
3102 3100
3103 3101 struct destroydata {
3104 3102 nvlist_t *nvl;
3105 3103 const char *snapname;
3106 3104 };
3107 3105
3108 3106 static int
3109 3107 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3110 3108 {
3111 3109 struct destroydata *dd = arg;
3112 3110 char name[ZFS_MAXNAMELEN];
3113 3111 int rv = 0;
3114 3112
3115 3113 (void) snprintf(name, sizeof (name),
3116 3114 "%s@%s", zhp->zfs_name, dd->snapname);
3117 3115
3118 3116 if (lzc_exists(name))
3119 3117 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3120 3118
3121 3119 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3122 3120 zfs_close(zhp);
3123 3121 return (rv);
3124 3122 }
3125 3123
3126 3124 /*
3127 3125 * Destroys all snapshots with the given name in zhp & descendants.
3128 3126 */
3129 3127 int
3130 3128 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3131 3129 {
3132 3130 int ret;
3133 3131 struct destroydata dd = { 0 };
3134 3132
3135 3133 dd.snapname = snapname;
3136 3134 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3137 3135 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3138 3136
3139 3137 if (nvlist_empty(dd.nvl)) {
3140 3138 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3141 3139 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3142 3140 zhp->zfs_name, snapname);
3143 3141 } else {
3144 3142 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3145 3143 }
3146 3144 nvlist_free(dd.nvl);
3147 3145 return (ret);
3148 3146 }
3149 3147
3150 3148 /*
3151 3149 * Destroys all the snapshots named in the nvlist.
3152 3150 */
3153 3151 int
3154 3152 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3155 3153 {
3156 3154 int ret;
3157 3155 nvlist_t *errlist;
3158 3156
3159 3157 ret = lzc_destroy_snaps(snaps, defer, &errlist);
3160 3158
3161 3159 if (ret == 0)
3162 3160 return (0);
3163 3161
3164 3162 if (nvlist_empty(errlist)) {
3165 3163 char errbuf[1024];
3166 3164 (void) snprintf(errbuf, sizeof (errbuf),
3167 3165 dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3168 3166
3169 3167 ret = zfs_standard_error(hdl, ret, errbuf);
3170 3168 }
3171 3169 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3172 3170 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3173 3171 char errbuf[1024];
3174 3172 (void) snprintf(errbuf, sizeof (errbuf),
3175 3173 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3176 3174 nvpair_name(pair));
3177 3175
3178 3176 switch (fnvpair_value_int32(pair)) {
3179 3177 case EEXIST:
3180 3178 zfs_error_aux(hdl,
3181 3179 dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3182 3180 ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3183 3181 break;
3184 3182 default:
3185 3183 ret = zfs_standard_error(hdl, errno, errbuf);
3186 3184 break;
3187 3185 }
3188 3186 }
3189 3187
3190 3188 return (ret);
3191 3189 }
3192 3190
3193 3191 /*
3194 3192 * Clones the given dataset. The target must be of the same type as the source.
3195 3193 */
3196 3194 int
3197 3195 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3198 3196 {
3199 3197 char parent[ZFS_MAXNAMELEN];
3200 3198 int ret;
3201 3199 char errbuf[1024];
3202 3200 libzfs_handle_t *hdl = zhp->zfs_hdl;
3203 3201 uint64_t zoned;
3204 3202
3205 3203 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3206 3204
3207 3205 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3208 3206 "cannot create '%s'"), target);
3209 3207
3210 3208 /* validate the target/clone name */
3211 3209 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3212 3210 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3213 3211
3214 3212 /* validate parents exist */
3215 3213 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3216 3214 return (-1);
3217 3215
3218 3216 (void) parent_name(target, parent, sizeof (parent));
3219 3217
3220 3218 /* do the clone */
3221 3219
3222 3220 if (props) {
3223 3221 zfs_type_t type;
3224 3222 if (ZFS_IS_VOLUME(zhp)) {
3225 3223 type = ZFS_TYPE_VOLUME;
3226 3224 } else {
3227 3225 type = ZFS_TYPE_FILESYSTEM;
3228 3226 }
3229 3227 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3230 3228 zhp, errbuf)) == NULL)
3231 3229 return (-1);
3232 3230 }
3233 3231
3234 3232 ret = lzc_clone(target, zhp->zfs_name, props);
3235 3233 nvlist_free(props);
3236 3234
3237 3235 if (ret != 0) {
3238 3236 switch (errno) {
3239 3237
3240 3238 case ENOENT:
3241 3239 /*
3242 3240 * The parent doesn't exist. We should have caught this
3243 3241 * above, but there may a race condition that has since
3244 3242 * destroyed the parent.
3245 3243 *
3246 3244 * At this point, we don't know whether it's the source
3247 3245 * that doesn't exist anymore, or whether the target
3248 3246 * dataset doesn't exist.
3249 3247 */
3250 3248 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3251 3249 "no such parent '%s'"), parent);
3252 3250 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3253 3251
3254 3252 case EXDEV:
3255 3253 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3256 3254 "source and target pools differ"));
3257 3255 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3258 3256 errbuf));
3259 3257
3260 3258 default:
3261 3259 return (zfs_standard_error(zhp->zfs_hdl, errno,
3262 3260 errbuf));
3263 3261 }
3264 3262 }
3265 3263
3266 3264 return (ret);
3267 3265 }
3268 3266
3269 3267 /*
3270 3268 * Promotes the given clone fs to be the clone parent.
3271 3269 */
3272 3270 int
3273 3271 zfs_promote(zfs_handle_t *zhp)
3274 3272 {
3275 3273 libzfs_handle_t *hdl = zhp->zfs_hdl;
3276 3274 zfs_cmd_t zc = { 0 };
3277 3275 char parent[MAXPATHLEN];
3278 3276 int ret;
3279 3277 char errbuf[1024];
3280 3278
3281 3279 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3282 3280 "cannot promote '%s'"), zhp->zfs_name);
3283 3281
3284 3282 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3285 3283 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3286 3284 "snapshots can not be promoted"));
3287 3285 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3288 3286 }
3289 3287
3290 3288 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3291 3289 if (parent[0] == '\0') {
3292 3290 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3293 3291 "not a cloned filesystem"));
3294 3292 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3295 3293 }
3296 3294
3297 3295 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3298 3296 sizeof (zc.zc_value));
3299 3297 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3300 3298 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3301 3299
3302 3300 if (ret != 0) {
3303 3301 int save_errno = errno;
3304 3302
3305 3303 switch (save_errno) {
3306 3304 case EEXIST:
3307 3305 /* There is a conflicting snapshot name. */
3308 3306 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3309 3307 "conflicting snapshot '%s' from parent '%s'"),
3310 3308 zc.zc_string, parent);
3311 3309 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3312 3310
3313 3311 default:
3314 3312 return (zfs_standard_error(hdl, save_errno, errbuf));
3315 3313 }
3316 3314 }
3317 3315 return (ret);
3318 3316 }
3319 3317
3320 3318 typedef struct snapdata {
3321 3319 nvlist_t *sd_nvl;
3322 3320 const char *sd_snapname;
3323 3321 } snapdata_t;
3324 3322
3325 3323 static int
3326 3324 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3327 3325 {
3328 3326 snapdata_t *sd = arg;
3329 3327 char name[ZFS_MAXNAMELEN];
3330 3328 int rv = 0;
3331 3329
3332 3330 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3333 3331 (void) snprintf(name, sizeof (name),
3334 3332 "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3335 3333
3336 3334 fnvlist_add_boolean(sd->sd_nvl, name);
3337 3335
3338 3336 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3339 3337 }
3340 3338 zfs_close(zhp);
3341 3339
3342 3340 return (rv);
3343 3341 }
3344 3342
3345 3343 /*
3346 3344 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be
3347 3345 * created.
3348 3346 */
3349 3347 int
3350 3348 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3351 3349 {
3352 3350 int ret;
3353 3351 char errbuf[1024];
3354 3352 nvpair_t *elem;
3355 3353 nvlist_t *errors;
3356 3354
3357 3355 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3358 3356 "cannot create snapshots "));
3359 3357
3360 3358 elem = NULL;
3361 3359 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3362 3360 const char *snapname = nvpair_name(elem);
3363 3361
3364 3362 /* validate the target name */
3365 3363 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3366 3364 B_TRUE)) {
3367 3365 (void) snprintf(errbuf, sizeof (errbuf),
3368 3366 dgettext(TEXT_DOMAIN,
3369 3367 "cannot create snapshot '%s'"), snapname);
3370 3368 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3371 3369 }
3372 3370 }
3373 3371
3374 3372 if (props != NULL &&
3375 3373 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3376 3374 props, B_FALSE, NULL, errbuf)) == NULL) {
3377 3375 return (-1);
3378 3376 }
3379 3377
3380 3378 ret = lzc_snapshot(snaps, props, &errors);
3381 3379
3382 3380 if (ret != 0) {
3383 3381 boolean_t printed = B_FALSE;
3384 3382 for (elem = nvlist_next_nvpair(errors, NULL);
3385 3383 elem != NULL;
3386 3384 elem = nvlist_next_nvpair(errors, elem)) {
3387 3385 (void) snprintf(errbuf, sizeof (errbuf),
3388 3386 dgettext(TEXT_DOMAIN,
3389 3387 "cannot create snapshot '%s'"), nvpair_name(elem));
3390 3388 (void) zfs_standard_error(hdl,
3391 3389 fnvpair_value_int32(elem), errbuf);
3392 3390 printed = B_TRUE;
3393 3391 }
3394 3392 if (!printed) {
3395 3393 switch (ret) {
3396 3394 case EXDEV:
3397 3395 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3398 3396 "multiple snapshots of same "
3399 3397 "fs not allowed"));
3400 3398 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3401 3399
3402 3400 break;
3403 3401 default:
3404 3402 (void) zfs_standard_error(hdl, ret, errbuf);
3405 3403 }
3406 3404 }
3407 3405 }
3408 3406
3409 3407 nvlist_free(props);
3410 3408 nvlist_free(errors);
3411 3409 return (ret);
3412 3410 }
3413 3411
3414 3412 int
3415 3413 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3416 3414 nvlist_t *props)
3417 3415 {
3418 3416 int ret;
3419 3417 snapdata_t sd = { 0 };
3420 3418 char fsname[ZFS_MAXNAMELEN];
3421 3419 char *cp;
3422 3420 zfs_handle_t *zhp;
3423 3421 char errbuf[1024];
3424 3422
3425 3423 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3426 3424 "cannot snapshot %s"), path);
3427 3425
3428 3426 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3429 3427 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3430 3428
3431 3429 (void) strlcpy(fsname, path, sizeof (fsname));
3432 3430 cp = strchr(fsname, '@');
3433 3431 *cp = '\0';
3434 3432 sd.sd_snapname = cp + 1;
3435 3433
3436 3434 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3437 3435 ZFS_TYPE_VOLUME)) == NULL) {
3438 3436 return (-1);
3439 3437 }
3440 3438
3441 3439 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3442 3440 if (recursive) {
3443 3441 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3444 3442 } else {
3445 3443 fnvlist_add_boolean(sd.sd_nvl, path);
3446 3444 }
3447 3445
3448 3446 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3449 3447 nvlist_free(sd.sd_nvl);
3450 3448 zfs_close(zhp);
3451 3449 return (ret);
3452 3450 }
3453 3451
3454 3452 /*
3455 3453 * Destroy any more recent snapshots. We invoke this callback on any dependents
3456 3454 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this
3457 3455 * is a dependent and we should just destroy it without checking the transaction
3458 3456 * group.
3459 3457 */
3460 3458 typedef struct rollback_data {
3461 3459 const char *cb_target; /* the snapshot */
3462 3460 uint64_t cb_create; /* creation time reference */
3463 3461 boolean_t cb_error;
3464 3462 boolean_t cb_dependent;
3465 3463 boolean_t cb_force;
3466 3464 } rollback_data_t;
3467 3465
3468 3466 static int
3469 3467 rollback_destroy(zfs_handle_t *zhp, void *data)
3470 3468 {
3471 3469 rollback_data_t *cbp = data;
3472 3470
3473 3471 if (!cbp->cb_dependent) {
3474 3472 if (strcmp(zhp->zfs_name, cbp->cb_target) != 0 &&
3475 3473 zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3476 3474 zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3477 3475 cbp->cb_create) {
3478 3476
3479 3477 cbp->cb_dependent = B_TRUE;
3480 3478 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3481 3479 rollback_destroy, cbp);
3482 3480 cbp->cb_dependent = B_FALSE;
3483 3481
3484 3482 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3485 3483 }
3486 3484 } else {
3487 3485 /* We must destroy this clone; first unmount it */
3488 3486 prop_changelist_t *clp;
3489 3487
3490 3488 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3491 3489 cbp->cb_force ? MS_FORCE: 0);
3492 3490 if (clp == NULL || changelist_prefix(clp) != 0) {
3493 3491 cbp->cb_error = B_TRUE;
3494 3492 zfs_close(zhp);
3495 3493 return (0);
3496 3494 }
3497 3495 if (zfs_destroy(zhp, B_FALSE) != 0)
3498 3496 cbp->cb_error = B_TRUE;
3499 3497 else
3500 3498 changelist_remove(clp, zhp->zfs_name);
3501 3499 (void) changelist_postfix(clp);
3502 3500 changelist_free(clp);
3503 3501 }
3504 3502
3505 3503 zfs_close(zhp);
3506 3504 return (0);
3507 3505 }
3508 3506
3509 3507 /*
3510 3508 * Given a dataset, rollback to a specific snapshot, discarding any
3511 3509 * data changes since then and making it the active dataset.
3512 3510 *
3513 3511 * Any snapshots more recent than the target are destroyed, along with
3514 3512 * their dependents.
3515 3513 */
3516 3514 int
3517 3515 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3518 3516 {
3519 3517 rollback_data_t cb = { 0 };
3520 3518 int err;
3521 3519 boolean_t restore_resv = 0;
3522 3520 uint64_t old_volsize, new_volsize;
3523 3521 zfs_prop_t resv_prop;
3524 3522
3525 3523 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3526 3524 zhp->zfs_type == ZFS_TYPE_VOLUME);
3527 3525
3528 3526 /*
3529 3527 * Destroy all recent snapshots and their dependents.
3530 3528 */
3531 3529 cb.cb_force = force;
3532 3530 cb.cb_target = snap->zfs_name;
3533 3531 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3534 3532 (void) zfs_iter_children(zhp, rollback_destroy, &cb);
3535 3533
3536 3534 if (cb.cb_error)
3537 3535 return (-1);
3538 3536
3539 3537 /*
3540 3538 * Now that we have verified that the snapshot is the latest,
3541 3539 * rollback to the given snapshot.
3542 3540 */
3543 3541
3544 3542 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3545 3543 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3546 3544 return (-1);
3547 3545 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3548 3546 restore_resv =
3549 3547 (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3550 3548 }
3551 3549
3552 3550 /*
3553 3551 * We rely on zfs_iter_children() to verify that there are no
3554 3552 * newer snapshots for the given dataset. Therefore, we can
3555 3553 * simply pass the name on to the ioctl() call. There is still
3556 3554 * an unlikely race condition where the user has taken a
3557 3555 * snapshot since we verified that this was the most recent.
3558 3556 */
3559 3557 err = lzc_rollback(zhp->zfs_name, NULL, 0);
3560 3558 if (err != 0) {
3561 3559 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3562 3560 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3563 3561 zhp->zfs_name);
3564 3562 return (err);
3565 3563 }
3566 3564
3567 3565 /*
3568 3566 * For volumes, if the pre-rollback volsize matched the pre-
3569 3567 * rollback reservation and the volsize has changed then set
3570 3568 * the reservation property to the post-rollback volsize.
3571 3569 * Make a new handle since the rollback closed the dataset.
3572 3570 */
3573 3571 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3574 3572 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3575 3573 if (restore_resv) {
3576 3574 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3577 3575 if (old_volsize != new_volsize)
3578 3576 err = zfs_prop_set_int(zhp, resv_prop,
3579 3577 new_volsize);
3580 3578 }
3581 3579 zfs_close(zhp);
3582 3580 }
3583 3581 return (err);
3584 3582 }
3585 3583
3586 3584 /*
3587 3585 * Renames the given dataset.
3588 3586 */
3589 3587 int
3590 3588 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
3591 3589 boolean_t force_unmount)
3592 3590 {
3593 3591 int ret;
3594 3592 zfs_cmd_t zc = { 0 };
3595 3593 char *delim;
3596 3594 prop_changelist_t *cl = NULL;
3597 3595 zfs_handle_t *zhrp = NULL;
3598 3596 char *parentname = NULL;
3599 3597 char parent[ZFS_MAXNAMELEN];
3600 3598 libzfs_handle_t *hdl = zhp->zfs_hdl;
3601 3599 char errbuf[1024];
3602 3600
3603 3601 /* if we have the same exact name, just return success */
3604 3602 if (strcmp(zhp->zfs_name, target) == 0)
3605 3603 return (0);
3606 3604
3607 3605 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3608 3606 "cannot rename to '%s'"), target);
3609 3607
3610 3608 /*
3611 3609 * Make sure the target name is valid
3612 3610 */
3613 3611 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3614 3612 if ((strchr(target, '@') == NULL) ||
3615 3613 *target == '@') {
3616 3614 /*
3617 3615 * Snapshot target name is abbreviated,
3618 3616 * reconstruct full dataset name
3619 3617 */
3620 3618 (void) strlcpy(parent, zhp->zfs_name,
3621 3619 sizeof (parent));
3622 3620 delim = strchr(parent, '@');
3623 3621 if (strchr(target, '@') == NULL)
3624 3622 *(++delim) = '\0';
3625 3623 else
3626 3624 *delim = '\0';
3627 3625 (void) strlcat(parent, target, sizeof (parent));
3628 3626 target = parent;
3629 3627 } else {
3630 3628 /*
3631 3629 * Make sure we're renaming within the same dataset.
3632 3630 */
3633 3631 delim = strchr(target, '@');
3634 3632 if (strncmp(zhp->zfs_name, target, delim - target)
3635 3633 != 0 || zhp->zfs_name[delim - target] != '@') {
3636 3634 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3637 3635 "snapshots must be part of same "
3638 3636 "dataset"));
3639 3637 return (zfs_error(hdl, EZFS_CROSSTARGET,
3640 3638 errbuf));
3641 3639 }
3642 3640 }
3643 3641 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3644 3642 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3645 3643 } else {
3646 3644 if (recursive) {
3647 3645 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3648 3646 "recursive rename must be a snapshot"));
3649 3647 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3650 3648 }
3651 3649
3652 3650 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3653 3651 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3654 3652
3655 3653 /* validate parents */
3656 3654 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3657 3655 return (-1);
3658 3656
3659 3657 /* make sure we're in the same pool */
3660 3658 verify((delim = strchr(target, '/')) != NULL);
3661 3659 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3662 3660 zhp->zfs_name[delim - target] != '/') {
3663 3661 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3664 3662 "datasets must be within same pool"));
3665 3663 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3666 3664 }
3667 3665
3668 3666 /* new name cannot be a child of the current dataset name */
3669 3667 if (is_descendant(zhp->zfs_name, target)) {
3670 3668 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3671 3669 "New dataset name cannot be a descendant of "
3672 3670 "current dataset name"));
3673 3671 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3674 3672 }
3675 3673 }
3676 3674
3677 3675 (void) snprintf(errbuf, sizeof (errbuf),
3678 3676 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3679 3677
3680 3678 if (getzoneid() == GLOBAL_ZONEID &&
3681 3679 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3682 3680 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3683 3681 "dataset is used in a non-global zone"));
3684 3682 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3685 3683 }
3686 3684
3687 3685 if (recursive) {
3688 3686
3689 3687 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3690 3688 if (parentname == NULL) {
3691 3689 ret = -1;
3692 3690 goto error;
3693 3691 }
3694 3692 delim = strchr(parentname, '@');
3695 3693 *delim = '\0';
3696 3694 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
3697 3695 if (zhrp == NULL) {
3698 3696 ret = -1;
3699 3697 goto error;
3700 3698 }
3701 3699
3702 3700 } else {
3703 3701 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3704 3702 force_unmount ? MS_FORCE : 0)) == NULL)
3705 3703 return (-1);
3706 3704
3707 3705 if (changelist_haszonedchild(cl)) {
3708 3706 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3709 3707 "child dataset with inherited mountpoint is used "
3710 3708 "in a non-global zone"));
3711 3709 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
3712 3710 goto error;
3713 3711 }
3714 3712
3715 3713 if ((ret = changelist_prefix(cl)) != 0)
3716 3714 goto error;
3717 3715 }
3718 3716
3719 3717 if (ZFS_IS_VOLUME(zhp))
3720 3718 zc.zc_objset_type = DMU_OST_ZVOL;
3721 3719 else
3722 3720 zc.zc_objset_type = DMU_OST_ZFS;
3723 3721
3724 3722 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3725 3723 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
3726 3724
3727 3725 zc.zc_cookie = recursive;
3728 3726
3729 3727 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
3730 3728 /*
3731 3729 * if it was recursive, the one that actually failed will
3732 3730 * be in zc.zc_name
3733 3731 */
3734 3732 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3735 3733 "cannot rename '%s'"), zc.zc_name);
3736 3734
3737 3735 if (recursive && errno == EEXIST) {
3738 3736 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3739 3737 "a child dataset already has a snapshot "
3740 3738 "with the new name"));
3741 3739 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3742 3740 } else {
3743 3741 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
3744 3742 }
3745 3743
3746 3744 /*
3747 3745 * On failure, we still want to remount any filesystems that
3748 3746 * were previously mounted, so we don't alter the system state.
3749 3747 */
3750 3748 if (!recursive)
3751 3749 (void) changelist_postfix(cl);
3752 3750 } else {
3753 3751 if (!recursive) {
3754 3752 changelist_rename(cl, zfs_get_name(zhp), target);
3755 3753 ret = changelist_postfix(cl);
3756 3754 }
3757 3755 }
3758 3756
3759 3757 error:
3760 3758 if (parentname) {
3761 3759 free(parentname);
3762 3760 }
3763 3761 if (zhrp) {
3764 3762 zfs_close(zhrp);
3765 3763 }
3766 3764 if (cl) {
3767 3765 changelist_free(cl);
3768 3766 }
3769 3767 return (ret);
3770 3768 }
3771 3769
3772 3770 nvlist_t *
3773 3771 zfs_get_user_props(zfs_handle_t *zhp)
3774 3772 {
3775 3773 return (zhp->zfs_user_props);
3776 3774 }
3777 3775
3778 3776 nvlist_t *
3779 3777 zfs_get_recvd_props(zfs_handle_t *zhp)
3780 3778 {
3781 3779 if (zhp->zfs_recvd_props == NULL)
3782 3780 if (get_recvd_props_ioctl(zhp) != 0)
3783 3781 return (NULL);
3784 3782 return (zhp->zfs_recvd_props);
3785 3783 }
3786 3784
3787 3785 /*
3788 3786 * This function is used by 'zfs list' to determine the exact set of columns to
3789 3787 * display, and their maximum widths. This does two main things:
3790 3788 *
3791 3789 * - If this is a list of all properties, then expand the list to include
3792 3790 * all native properties, and set a flag so that for each dataset we look
3793 3791 * for new unique user properties and add them to the list.
3794 3792 *
3795 3793 * - For non fixed-width properties, keep track of the maximum width seen
3796 3794 * so that we can size the column appropriately. If the user has
3797 3795 * requested received property values, we also need to compute the width
3798 3796 * of the RECEIVED column.
3799 3797 */
3800 3798 int
3801 3799 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received)
3802 3800 {
3803 3801 libzfs_handle_t *hdl = zhp->zfs_hdl;
3804 3802 zprop_list_t *entry;
3805 3803 zprop_list_t **last, **start;
3806 3804 nvlist_t *userprops, *propval;
3807 3805 nvpair_t *elem;
3808 3806 char *strval;
3809 3807 char buf[ZFS_MAXPROPLEN];
3810 3808
3811 3809 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
3812 3810 return (-1);
3813 3811
3814 3812 userprops = zfs_get_user_props(zhp);
3815 3813
3816 3814 entry = *plp;
3817 3815 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
3818 3816 /*
3819 3817 * Go through and add any user properties as necessary. We
3820 3818 * start by incrementing our list pointer to the first
3821 3819 * non-native property.
3822 3820 */
3823 3821 start = plp;
3824 3822 while (*start != NULL) {
3825 3823 if ((*start)->pl_prop == ZPROP_INVAL)
3826 3824 break;
3827 3825 start = &(*start)->pl_next;
3828 3826 }
3829 3827
3830 3828 elem = NULL;
3831 3829 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
3832 3830 /*
3833 3831 * See if we've already found this property in our list.
3834 3832 */
3835 3833 for (last = start; *last != NULL;
3836 3834 last = &(*last)->pl_next) {
3837 3835 if (strcmp((*last)->pl_user_prop,
3838 3836 nvpair_name(elem)) == 0)
3839 3837 break;
3840 3838 }
3841 3839
3842 3840 if (*last == NULL) {
3843 3841 if ((entry = zfs_alloc(hdl,
3844 3842 sizeof (zprop_list_t))) == NULL ||
3845 3843 ((entry->pl_user_prop = zfs_strdup(hdl,
3846 3844 nvpair_name(elem)))) == NULL) {
3847 3845 free(entry);
3848 3846 return (-1);
3849 3847 }
3850 3848
3851 3849 entry->pl_prop = ZPROP_INVAL;
3852 3850 entry->pl_width = strlen(nvpair_name(elem));
3853 3851 entry->pl_all = B_TRUE;
3854 3852 *last = entry;
3855 3853 }
3856 3854 }
3857 3855 }
3858 3856
3859 3857 /*
3860 3858 * Now go through and check the width of any non-fixed columns
3861 3859 */
3862 3860 for (entry = *plp; entry != NULL; entry = entry->pl_next) {
3863 3861 if (entry->pl_fixed)
3864 3862 continue;
3865 3863
3866 3864 if (entry->pl_prop != ZPROP_INVAL) {
3867 3865 if (zfs_prop_get(zhp, entry->pl_prop,
3868 3866 buf, sizeof (buf), NULL, NULL, 0, B_FALSE) == 0) {
3869 3867 if (strlen(buf) > entry->pl_width)
3870 3868 entry->pl_width = strlen(buf);
3871 3869 }
3872 3870 if (received && zfs_prop_get_recvd(zhp,
3873 3871 zfs_prop_to_name(entry->pl_prop),
3874 3872 buf, sizeof (buf), B_FALSE) == 0)
3875 3873 if (strlen(buf) > entry->pl_recvd_width)
3876 3874 entry->pl_recvd_width = strlen(buf);
3877 3875 } else {
3878 3876 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
3879 3877 &propval) == 0) {
3880 3878 verify(nvlist_lookup_string(propval,
3881 3879 ZPROP_VALUE, &strval) == 0);
3882 3880 if (strlen(strval) > entry->pl_width)
3883 3881 entry->pl_width = strlen(strval);
3884 3882 }
3885 3883 if (received && zfs_prop_get_recvd(zhp,
3886 3884 entry->pl_user_prop,
3887 3885 buf, sizeof (buf), B_FALSE) == 0)
3888 3886 if (strlen(buf) > entry->pl_recvd_width)
3889 3887 entry->pl_recvd_width = strlen(buf);
3890 3888 }
3891 3889 }
3892 3890
3893 3891 return (0);
3894 3892 }
3895 3893
3896 3894 int
3897 3895 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
3898 3896 char *resource, void *export, void *sharetab,
3899 3897 int sharemax, zfs_share_op_t operation)
3900 3898 {
3901 3899 zfs_cmd_t zc = { 0 };
3902 3900 int error;
3903 3901
3904 3902 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3905 3903 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
3906 3904 if (resource)
3907 3905 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
3908 3906 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
3909 3907 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
3910 3908 zc.zc_share.z_sharetype = operation;
3911 3909 zc.zc_share.z_sharemax = sharemax;
3912 3910 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
3913 3911 return (error);
3914 3912 }
3915 3913
3916 3914 void
3917 3915 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
3918 3916 {
3919 3917 nvpair_t *curr;
3920 3918
3921 3919 /*
3922 3920 * Keep a reference to the props-table against which we prune the
3923 3921 * properties.
3924 3922 */
3925 3923 zhp->zfs_props_table = props;
3926 3924
3927 3925 curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
3928 3926
3929 3927 while (curr) {
3930 3928 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
3931 3929 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
3932 3930
3933 3931 /*
3934 3932 * User properties will result in ZPROP_INVAL, and since we
3935 3933 * only know how to prune standard ZFS properties, we always
3936 3934 * leave these in the list. This can also happen if we
3937 3935 * encounter an unknown DSL property (when running older
3938 3936 * software, for example).
3939 3937 */
3940 3938 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
3941 3939 (void) nvlist_remove(zhp->zfs_props,
3942 3940 nvpair_name(curr), nvpair_type(curr));
3943 3941 curr = next;
3944 3942 }
3945 3943 }
3946 3944
3947 3945 static int
3948 3946 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
3949 3947 zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
3950 3948 {
3951 3949 zfs_cmd_t zc = { 0 };
3952 3950 nvlist_t *nvlist = NULL;
3953 3951 int error;
3954 3952
3955 3953 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3956 3954 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
3957 3955 zc.zc_cookie = (uint64_t)cmd;
3958 3956
3959 3957 if (cmd == ZFS_SMB_ACL_RENAME) {
3960 3958 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
3961 3959 (void) no_memory(hdl);
3962 3960 return (NULL);
3963 3961 }
3964 3962 }
3965 3963
3966 3964 switch (cmd) {
3967 3965 case ZFS_SMB_ACL_ADD:
3968 3966 case ZFS_SMB_ACL_REMOVE:
3969 3967 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
3970 3968 break;
3971 3969 case ZFS_SMB_ACL_RENAME:
3972 3970 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
3973 3971 resource1) != 0) {
3974 3972 (void) no_memory(hdl);
3975 3973 return (-1);
3976 3974 }
3977 3975 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
3978 3976 resource2) != 0) {
3979 3977 (void) no_memory(hdl);
3980 3978 return (-1);
3981 3979 }
3982 3980 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
3983 3981 nvlist_free(nvlist);
3984 3982 return (-1);
3985 3983 }
3986 3984 break;
3987 3985 case ZFS_SMB_ACL_PURGE:
3988 3986 break;
3989 3987 default:
3990 3988 return (-1);
3991 3989 }
3992 3990 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
3993 3991 if (nvlist)
3994 3992 nvlist_free(nvlist);
3995 3993 return (error);
3996 3994 }
3997 3995
3998 3996 int
3999 3997 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4000 3998 char *path, char *resource)
4001 3999 {
4002 4000 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4003 4001 resource, NULL));
4004 4002 }
4005 4003
4006 4004 int
4007 4005 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4008 4006 char *path, char *resource)
4009 4007 {
4010 4008 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4011 4009 resource, NULL));
4012 4010 }
4013 4011
4014 4012 int
4015 4013 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4016 4014 {
4017 4015 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4018 4016 NULL, NULL));
4019 4017 }
4020 4018
4021 4019 int
4022 4020 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4023 4021 char *oldname, char *newname)
4024 4022 {
4025 4023 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4026 4024 oldname, newname));
4027 4025 }
4028 4026
4029 4027 int
4030 4028 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4031 4029 zfs_userspace_cb_t func, void *arg)
4032 4030 {
4033 4031 zfs_cmd_t zc = { 0 };
4034 4032 zfs_useracct_t buf[100];
4035 4033 libzfs_handle_t *hdl = zhp->zfs_hdl;
4036 4034 int ret;
4037 4035
4038 4036 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4039 4037
4040 4038 zc.zc_objset_type = type;
4041 4039 zc.zc_nvlist_dst = (uintptr_t)buf;
4042 4040
4043 4041 for (;;) {
4044 4042 zfs_useracct_t *zua = buf;
4045 4043
4046 4044 zc.zc_nvlist_dst_size = sizeof (buf);
4047 4045 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4048 4046 char errbuf[1024];
4049 4047
4050 4048 (void) snprintf(errbuf, sizeof (errbuf),
4051 4049 dgettext(TEXT_DOMAIN,
4052 4050 "cannot get used/quota for %s"), zc.zc_name);
4053 4051 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4054 4052 }
4055 4053 if (zc.zc_nvlist_dst_size == 0)
4056 4054 break;
4057 4055
4058 4056 while (zc.zc_nvlist_dst_size > 0) {
4059 4057 if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4060 4058 zua->zu_space)) != 0)
4061 4059 return (ret);
4062 4060 zua++;
4063 4061 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4064 4062 }
4065 4063 }
4066 4064
4067 4065 return (0);
4068 4066 }
4069 4067
4070 4068 struct holdarg {
4071 4069 nvlist_t *nvl;
4072 4070 const char *snapname;
4073 4071 const char *tag;
4074 4072 boolean_t recursive;
4075 4073 int error;
4076 4074 };
4077 4075
4078 4076 static int
4079 4077 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4080 4078 {
4081 4079 struct holdarg *ha = arg;
4082 4080 char name[ZFS_MAXNAMELEN];
4083 4081 int rv = 0;
4084 4082
4085 4083 (void) snprintf(name, sizeof (name),
4086 4084 "%s@%s", zhp->zfs_name, ha->snapname);
4087 4085
4088 4086 if (lzc_exists(name))
4089 4087 fnvlist_add_string(ha->nvl, name, ha->tag);
4090 4088
4091 4089 if (ha->recursive)
4092 4090 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4093 4091 zfs_close(zhp);
4094 4092 return (rv);
4095 4093 }
4096 4094
4097 4095 int
4098 4096 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4099 4097 boolean_t recursive, int cleanup_fd)
4100 4098 {
4101 4099 int ret;
4102 4100 struct holdarg ha;
4103 4101
4104 4102 ha.nvl = fnvlist_alloc();
4105 4103 ha.snapname = snapname;
4106 4104 ha.tag = tag;
4107 4105 ha.recursive = recursive;
4108 4106 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4109 4107
4110 4108 if (nvlist_empty(ha.nvl)) {
4111 4109 char errbuf[1024];
4112 4110
4113 4111 fnvlist_free(ha.nvl);
4114 4112 ret = ENOENT;
4115 4113 (void) snprintf(errbuf, sizeof (errbuf),
4116 4114 dgettext(TEXT_DOMAIN,
4117 4115 "cannot hold snapshot '%s@%s'"),
4118 4116 zhp->zfs_name, snapname);
4119 4117 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4120 4118 return (ret);
4121 4119 }
4122 4120
4123 4121 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4124 4122 fnvlist_free(ha.nvl);
4125 4123
4126 4124 return (ret);
4127 4125 }
4128 4126
4129 4127 int
4130 4128 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4131 4129 {
4132 4130 int ret;
4133 4131 nvlist_t *errors;
4134 4132 libzfs_handle_t *hdl = zhp->zfs_hdl;
4135 4133 char errbuf[1024];
4136 4134 nvpair_t *elem;
4137 4135
4138 4136 errors = NULL;
4139 4137 ret = lzc_hold(holds, cleanup_fd, &errors);
4140 4138
4141 4139 if (ret == 0) {
4142 4140 /* There may be errors even in the success case. */
4143 4141 fnvlist_free(errors);
4144 4142 return (0);
4145 4143 }
4146 4144
4147 4145 if (nvlist_empty(errors)) {
4148 4146 /* no hold-specific errors */
4149 4147 (void) snprintf(errbuf, sizeof (errbuf),
4150 4148 dgettext(TEXT_DOMAIN, "cannot hold"));
4151 4149 switch (ret) {
4152 4150 case ENOTSUP:
4153 4151 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4154 4152 "pool must be upgraded"));
4155 4153 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4156 4154 break;
4157 4155 case EINVAL:
4158 4156 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4159 4157 break;
4160 4158 default:
4161 4159 (void) zfs_standard_error(hdl, ret, errbuf);
4162 4160 }
4163 4161 }
4164 4162
4165 4163 for (elem = nvlist_next_nvpair(errors, NULL);
4166 4164 elem != NULL;
4167 4165 elem = nvlist_next_nvpair(errors, elem)) {
4168 4166 (void) snprintf(errbuf, sizeof (errbuf),
4169 4167 dgettext(TEXT_DOMAIN,
4170 4168 "cannot hold snapshot '%s'"), nvpair_name(elem));
4171 4169 switch (fnvpair_value_int32(elem)) {
4172 4170 case E2BIG:
4173 4171 /*
4174 4172 * Temporary tags wind up having the ds object id
4175 4173 * prepended. So even if we passed the length check
4176 4174 * above, it's still possible for the tag to wind
4177 4175 * up being slightly too long.
4178 4176 */
4179 4177 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4180 4178 break;
4181 4179 case EINVAL:
4182 4180 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4183 4181 break;
4184 4182 case EEXIST:
4185 4183 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4186 4184 break;
4187 4185 default:
4188 4186 (void) zfs_standard_error(hdl,
4189 4187 fnvpair_value_int32(elem), errbuf);
4190 4188 }
4191 4189 }
4192 4190
4193 4191 fnvlist_free(errors);
4194 4192 return (ret);
4195 4193 }
4196 4194
4197 4195 static int
4198 4196 zfs_release_one(zfs_handle_t *zhp, void *arg)
4199 4197 {
4200 4198 struct holdarg *ha = arg;
4201 4199 char name[ZFS_MAXNAMELEN];
4202 4200 int rv = 0;
4203 4201 nvlist_t *existing_holds;
4204 4202
4205 4203 (void) snprintf(name, sizeof (name),
4206 4204 "%s@%s", zhp->zfs_name, ha->snapname);
4207 4205
4208 4206 if (lzc_get_holds(name, &existing_holds) != 0) {
4209 4207 ha->error = ENOENT;
4210 4208 } else if (!nvlist_exists(existing_holds, ha->tag)) {
4211 4209 ha->error = ESRCH;
4212 4210 } else {
4213 4211 nvlist_t *torelease = fnvlist_alloc();
4214 4212 fnvlist_add_boolean(torelease, ha->tag);
4215 4213 fnvlist_add_nvlist(ha->nvl, name, torelease);
4216 4214 fnvlist_free(torelease);
4217 4215 }
4218 4216
4219 4217 if (ha->recursive)
4220 4218 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4221 4219 zfs_close(zhp);
4222 4220 return (rv);
4223 4221 }
4224 4222
4225 4223 int
4226 4224 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4227 4225 boolean_t recursive)
4228 4226 {
4229 4227 int ret;
4230 4228 struct holdarg ha;
4231 4229 nvlist_t *errors = NULL;
4232 4230 nvpair_t *elem;
4233 4231 libzfs_handle_t *hdl = zhp->zfs_hdl;
4234 4232 char errbuf[1024];
4235 4233
4236 4234 ha.nvl = fnvlist_alloc();
4237 4235 ha.snapname = snapname;
4238 4236 ha.tag = tag;
4239 4237 ha.recursive = recursive;
4240 4238 ha.error = 0;
4241 4239 (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4242 4240
4243 4241 if (nvlist_empty(ha.nvl)) {
4244 4242 fnvlist_free(ha.nvl);
4245 4243 ret = ha.error;
4246 4244 (void) snprintf(errbuf, sizeof (errbuf),
4247 4245 dgettext(TEXT_DOMAIN,
4248 4246 "cannot release hold from snapshot '%s@%s'"),
4249 4247 zhp->zfs_name, snapname);
4250 4248 if (ret == ESRCH) {
4251 4249 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4252 4250 } else {
4253 4251 (void) zfs_standard_error(hdl, ret, errbuf);
4254 4252 }
4255 4253 return (ret);
4256 4254 }
4257 4255
4258 4256 ret = lzc_release(ha.nvl, &errors);
4259 4257 fnvlist_free(ha.nvl);
4260 4258
4261 4259 if (ret == 0) {
4262 4260 /* There may be errors even in the success case. */
4263 4261 fnvlist_free(errors);
4264 4262 return (0);
4265 4263 }
4266 4264
4267 4265 if (nvlist_empty(errors)) {
4268 4266 /* no hold-specific errors */
4269 4267 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4270 4268 "cannot release"));
4271 4269 switch (errno) {
4272 4270 case ENOTSUP:
4273 4271 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4274 4272 "pool must be upgraded"));
4275 4273 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4276 4274 break;
4277 4275 default:
4278 4276 (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4279 4277 }
4280 4278 }
4281 4279
4282 4280 for (elem = nvlist_next_nvpair(errors, NULL);
4283 4281 elem != NULL;
4284 4282 elem = nvlist_next_nvpair(errors, elem)) {
4285 4283 (void) snprintf(errbuf, sizeof (errbuf),
4286 4284 dgettext(TEXT_DOMAIN,
4287 4285 "cannot release hold from snapshot '%s'"),
4288 4286 nvpair_name(elem));
4289 4287 switch (fnvpair_value_int32(elem)) {
4290 4288 case ESRCH:
4291 4289 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4292 4290 break;
4293 4291 case EINVAL:
4294 4292 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4295 4293 break;
4296 4294 default:
4297 4295 (void) zfs_standard_error_fmt(hdl,
4298 4296 fnvpair_value_int32(elem), errbuf);
4299 4297 }
4300 4298 }
4301 4299
4302 4300 fnvlist_free(errors);
4303 4301 return (ret);
4304 4302 }
4305 4303
4306 4304 int
4307 4305 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4308 4306 {
4309 4307 zfs_cmd_t zc = { 0 };
4310 4308 libzfs_handle_t *hdl = zhp->zfs_hdl;
4311 4309 int nvsz = 2048;
4312 4310 void *nvbuf;
4313 4311 int err = 0;
4314 4312 char errbuf[1024];
4315 4313
4316 4314 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4317 4315 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4318 4316
4319 4317 tryagain:
4320 4318
4321 4319 nvbuf = malloc(nvsz);
4322 4320 if (nvbuf == NULL) {
4323 4321 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4324 4322 goto out;
4325 4323 }
4326 4324
4327 4325 zc.zc_nvlist_dst_size = nvsz;
4328 4326 zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4329 4327
4330 4328 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4331 4329
4332 4330 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4333 4331 (void) snprintf(errbuf, sizeof (errbuf),
4334 4332 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4335 4333 zc.zc_name);
4336 4334 switch (errno) {
4337 4335 case ENOMEM:
4338 4336 free(nvbuf);
4339 4337 nvsz = zc.zc_nvlist_dst_size;
4340 4338 goto tryagain;
4341 4339
4342 4340 case ENOTSUP:
4343 4341 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4344 4342 "pool must be upgraded"));
4345 4343 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4346 4344 break;
4347 4345 case EINVAL:
4348 4346 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4349 4347 break;
4350 4348 case ENOENT:
4351 4349 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4352 4350 break;
4353 4351 default:
4354 4352 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4355 4353 break;
4356 4354 }
4357 4355 } else {
4358 4356 /* success */
4359 4357 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4360 4358 if (rc) {
4361 4359 (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4362 4360 TEXT_DOMAIN, "cannot get permissions on '%s'"),
4363 4361 zc.zc_name);
4364 4362 err = zfs_standard_error_fmt(hdl, rc, errbuf);
4365 4363 }
4366 4364 }
4367 4365
4368 4366 free(nvbuf);
4369 4367 out:
4370 4368 return (err);
4371 4369 }
4372 4370
4373 4371 int
4374 4372 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4375 4373 {
4376 4374 zfs_cmd_t zc = { 0 };
4377 4375 libzfs_handle_t *hdl = zhp->zfs_hdl;
4378 4376 char *nvbuf;
4379 4377 char errbuf[1024];
4380 4378 size_t nvsz;
4381 4379 int err;
4382 4380
4383 4381 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4384 4382 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4385 4383
4386 4384 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4387 4385 assert(err == 0);
4388 4386
4389 4387 nvbuf = malloc(nvsz);
4390 4388
4391 4389 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4392 4390 assert(err == 0);
4393 4391
4394 4392 zc.zc_nvlist_src_size = nvsz;
4395 4393 zc.zc_nvlist_src = (uintptr_t)nvbuf;
4396 4394 zc.zc_perm_action = un;
4397 4395
4398 4396 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4399 4397
4400 4398 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4401 4399 (void) snprintf(errbuf, sizeof (errbuf),
4402 4400 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4403 4401 zc.zc_name);
4404 4402 switch (errno) {
4405 4403 case ENOTSUP:
4406 4404 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4407 4405 "pool must be upgraded"));
4408 4406 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4409 4407 break;
4410 4408 case EINVAL:
4411 4409 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4412 4410 break;
4413 4411 case ENOENT:
4414 4412 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4415 4413 break;
4416 4414 default:
4417 4415 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4418 4416 break;
4419 4417 }
4420 4418 }
4421 4419
4422 4420 free(nvbuf);
4423 4421
4424 4422 return (err);
4425 4423 }
4426 4424
4427 4425 int
4428 4426 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4429 4427 {
4430 4428 int err;
4431 4429 char errbuf[1024];
4432 4430
4433 4431 err = lzc_get_holds(zhp->zfs_name, nvl);
4434 4432
4435 4433 if (err != 0) {
4436 4434 libzfs_handle_t *hdl = zhp->zfs_hdl;
4437 4435
4438 4436 (void) snprintf(errbuf, sizeof (errbuf),
4439 4437 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4440 4438 zhp->zfs_name);
4441 4439 switch (err) {
4442 4440 case ENOTSUP:
4443 4441 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4444 4442 "pool must be upgraded"));
4445 4443 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4446 4444 break;
4447 4445 case EINVAL:
4448 4446 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4449 4447 break;
4450 4448 case ENOENT:
4451 4449 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4452 4450 break;
|
↓ open down ↓ |
3127 lines elided |
↑ open up ↑ |
4453 4451 default:
4454 4452 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4455 4453 break;
4456 4454 }
4457 4455 }
4458 4456
4459 4457 return (err);
4460 4458 }
4461 4459
4462 4460 /*
4463 - * Convert the zvol's volume size to an appropriate reservation.
4461 + * Convert the zvol's volume size to an appropriate reservation. This is a
4462 + * convenience front-end to zvol_volsize_to_reservation_impl.
4464 4463 * Note: If this routine is updated, it is necessary to update the ZFS test
4465 4464 * suite's shell version in reservation.kshlib.
4466 4465 */
4467 4466 uint64_t
4468 4467 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4469 4468 {
4470 - uint64_t numdb;
4471 - uint64_t nblocks, volblocksize;
4469 + uint64_t volblocksize;
4472 4470 int ncopies;
4473 4471 char *strval;
4474 4472
4475 4473 if (nvlist_lookup_string(props,
4476 4474 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4477 4475 ncopies = atoi(strval);
4478 4476 else
4479 4477 ncopies = 1;
4480 4478 if (nvlist_lookup_uint64(props,
4481 4479 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4482 4480 &volblocksize) != 0)
4483 4481 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4482 +
4483 + return (zvol_volsize_to_reservation_impl(volsize, volblocksize,
4484 + ncopies));
4485 +}
4486 +
4487 +/*
4488 + * Computes the required reservation to completely contain all blocks of a
4489 + * zvol at a given volsize.
4490 + */
4491 +uint64_t
4492 +zvol_volsize_to_reservation_impl(uint64_t volsize, uint64_t volblocksize,
4493 + int ncopies)
4494 +{
4495 + uint64_t numdb;
4496 + uint64_t nblocks;
4497 +
4484 4498 nblocks = volsize/volblocksize;
4485 4499 /* start with metadnode L0-L6 */
4486 4500 numdb = 7;
4487 4501 /* calculate number of indirects */
4488 4502 while (nblocks > 1) {
4489 4503 nblocks += DNODES_PER_LEVEL - 1;
4490 4504 nblocks /= DNODES_PER_LEVEL;
4491 4505 numdb += nblocks;
4492 4506 }
4493 4507 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4494 4508 volsize *= ncopies;
4495 4509 /*
4496 4510 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4497 4511 * compressed, but in practice they compress down to about
4498 4512 * 1100 bytes
4499 4513 */
4500 4514 numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4501 4515 volsize += numdb;
4502 4516 return (volsize);
4503 4517 }
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