1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2011 by Delphix. All rights reserved.
24 */
25
26 /*
27 * DSL permissions are stored in a two level zap attribute
28 * mechanism. The first level identifies the "class" of
29 * entry. The class is identified by the first 2 letters of
30 * the attribute. The second letter "l" or "d" identifies whether
31 * it is a local or descendent permission. The first letter
32 * identifies the type of entry.
33 *
34 * ul$<id> identifies permissions granted locally for this userid.
35 * ud$<id> identifies permissions granted on descendent datasets for
36 * this userid.
37 * Ul$<id> identifies permission sets granted locally for this userid.
38 * Ud$<id> identifies permission sets granted on descendent datasets for
39 * this userid.
40 * gl$<id> identifies permissions granted locally for this groupid.
41 * gd$<id> identifies permissions granted on descendent datasets for
42 * this groupid.
43 * Gl$<id> identifies permission sets granted locally for this groupid.
44 * Gd$<id> identifies permission sets granted on descendent datasets for
45 * this groupid.
46 * el$ identifies permissions granted locally for everyone.
47 * ed$ identifies permissions granted on descendent datasets
48 * for everyone.
49 * El$ identifies permission sets granted locally for everyone.
50 * Ed$ identifies permission sets granted to descendent datasets for
51 * everyone.
52 * c-$ identifies permission to create at dataset creation time.
53 * C-$ identifies permission sets to grant locally at dataset creation
54 * time.
55 * s-$@<name> permissions defined in specified set @<name>
56 * S-$@<name> Sets defined in named set @<name>
57 *
58 * Each of the above entities points to another zap attribute that contains one
59 * attribute for each allowed permission, such as create, destroy,...
60 * All of the "upper" case class types will specify permission set names
61 * rather than permissions.
62 *
63 * Basically it looks something like this:
64 * ul$12 -> ZAP OBJ -> permissions...
65 *
66 * The ZAP OBJ is referred to as the jump object.
67 */
68
69 #include <sys/dmu.h>
70 #include <sys/dmu_objset.h>
71 #include <sys/dmu_tx.h>
72 #include <sys/dsl_dataset.h>
73 #include <sys/dsl_dir.h>
74 #include <sys/dsl_prop.h>
75 #include <sys/dsl_synctask.h>
76 #include <sys/dsl_deleg.h>
77 #include <sys/spa.h>
78 #include <sys/zap.h>
79 #include <sys/fs/zfs.h>
80 #include <sys/cred.h>
81 #include <sys/sunddi.h>
82
83 #include "zfs_deleg.h"
84
85 /*
86 * Validate that user is allowed to delegate specified permissions.
87 *
88 * In order to delegate "create" you must have "create"
89 * and "allow".
90 */
91 int
92 dsl_deleg_can_allow(char *ddname, nvlist_t *nvp, cred_t *cr)
93 {
94 nvpair_t *whopair = NULL;
95 int error;
96
97 if ((error = dsl_deleg_access(ddname, ZFS_DELEG_PERM_ALLOW, cr)) != 0)
98 return (error);
99
100 while (whopair = nvlist_next_nvpair(nvp, whopair)) {
101 nvlist_t *perms;
102 nvpair_t *permpair = NULL;
103
104 VERIFY(nvpair_value_nvlist(whopair, &perms) == 0);
105
106 while (permpair = nvlist_next_nvpair(perms, permpair)) {
107 const char *perm = nvpair_name(permpair);
108
109 if (strcmp(perm, ZFS_DELEG_PERM_ALLOW) == 0)
110 return (EPERM);
111
112 if ((error = dsl_deleg_access(ddname, perm, cr)) != 0)
113 return (error);
114 }
115 }
116 return (0);
117 }
118
119 /*
120 * Validate that user is allowed to unallow specified permissions. They
121 * must have the 'allow' permission, and even then can only unallow
122 * perms for their uid.
123 */
124 int
125 dsl_deleg_can_unallow(char *ddname, nvlist_t *nvp, cred_t *cr)
126 {
127 nvpair_t *whopair = NULL;
128 int error;
129 char idstr[32];
130
131 if ((error = dsl_deleg_access(ddname, ZFS_DELEG_PERM_ALLOW, cr)) != 0)
132 return (error);
133
134 (void) snprintf(idstr, sizeof (idstr), "%lld",
135 (longlong_t)crgetuid(cr));
136
137 while (whopair = nvlist_next_nvpair(nvp, whopair)) {
138 zfs_deleg_who_type_t type = nvpair_name(whopair)[0];
139
140 if (type != ZFS_DELEG_USER &&
141 type != ZFS_DELEG_USER_SETS)
142 return (EPERM);
143
144 if (strcmp(idstr, &nvpair_name(whopair)[3]) != 0)
145 return (EPERM);
146 }
147 return (0);
148 }
149
150 static void
151 dsl_deleg_set_sync(void *arg1, void *arg2, dmu_tx_t *tx)
152 {
153 dsl_dir_t *dd = arg1;
154 nvlist_t *nvp = arg2;
155 objset_t *mos = dd->dd_pool->dp_meta_objset;
156 nvpair_t *whopair = NULL;
157 uint64_t zapobj = dd->dd_phys->dd_deleg_zapobj;
158
159 if (zapobj == 0) {
160 dmu_buf_will_dirty(dd->dd_dbuf, tx);
161 zapobj = dd->dd_phys->dd_deleg_zapobj = zap_create(mos,
162 DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx);
163 }
164
165 while (whopair = nvlist_next_nvpair(nvp, whopair)) {
166 const char *whokey = nvpair_name(whopair);
167 nvlist_t *perms;
168 nvpair_t *permpair = NULL;
169 uint64_t jumpobj;
170
171 VERIFY(nvpair_value_nvlist(whopair, &perms) == 0);
172
173 if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0) {
174 jumpobj = zap_create(mos, DMU_OT_DSL_PERMS,
175 DMU_OT_NONE, 0, tx);
176 VERIFY(zap_update(mos, zapobj,
177 whokey, 8, 1, &jumpobj, tx) == 0);
178 }
179
180 while (permpair = nvlist_next_nvpair(perms, permpair)) {
181 const char *perm = nvpair_name(permpair);
182 uint64_t n = 0;
183
184 VERIFY(zap_update(mos, jumpobj,
185 perm, 8, 1, &n, tx) == 0);
186 spa_history_log_internal(LOG_DS_PERM_UPDATE,
187 dd->dd_pool->dp_spa, tx,
188 "%s %s dataset = %llu", whokey, perm,
189 dd->dd_phys->dd_head_dataset_obj);
190 }
191 }
192 }
193
194 static void
195 dsl_deleg_unset_sync(void *arg1, void *arg2, dmu_tx_t *tx)
196 {
197 dsl_dir_t *dd = arg1;
198 nvlist_t *nvp = arg2;
199 objset_t *mos = dd->dd_pool->dp_meta_objset;
200 nvpair_t *whopair = NULL;
201 uint64_t zapobj = dd->dd_phys->dd_deleg_zapobj;
202
203 if (zapobj == 0)
204 return;
205
206 while (whopair = nvlist_next_nvpair(nvp, whopair)) {
207 const char *whokey = nvpair_name(whopair);
208 nvlist_t *perms;
209 nvpair_t *permpair = NULL;
210 uint64_t jumpobj;
211
212 if (nvpair_value_nvlist(whopair, &perms) != 0) {
213 if (zap_lookup(mos, zapobj, whokey, 8,
214 1, &jumpobj) == 0) {
215 (void) zap_remove(mos, zapobj, whokey, tx);
216 VERIFY(0 == zap_destroy(mos, jumpobj, tx));
217 }
218 spa_history_log_internal(LOG_DS_PERM_WHO_REMOVE,
219 dd->dd_pool->dp_spa, tx,
220 "%s dataset = %llu", whokey,
221 dd->dd_phys->dd_head_dataset_obj);
222 continue;
223 }
224
225 if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0)
226 continue;
227
228 while (permpair = nvlist_next_nvpair(perms, permpair)) {
229 const char *perm = nvpair_name(permpair);
230 uint64_t n = 0;
231
232 (void) zap_remove(mos, jumpobj, perm, tx);
233 if (zap_count(mos, jumpobj, &n) == 0 && n == 0) {
234 (void) zap_remove(mos, zapobj,
235 whokey, tx);
236 VERIFY(0 == zap_destroy(mos,
237 jumpobj, tx));
238 }
239 spa_history_log_internal(LOG_DS_PERM_REMOVE,
240 dd->dd_pool->dp_spa, tx,
241 "%s %s dataset = %llu", whokey, perm,
242 dd->dd_phys->dd_head_dataset_obj);
243 }
244 }
245 }
246
247 int
248 dsl_deleg_set(const char *ddname, nvlist_t *nvp, boolean_t unset)
249 {
250 dsl_dir_t *dd;
251 int error;
252 nvpair_t *whopair = NULL;
253 int blocks_modified = 0;
254
255 error = dsl_dir_open(ddname, FTAG, &dd, NULL);
256 if (error)
257 return (error);
258
259 if (spa_version(dmu_objset_spa(dd->dd_pool->dp_meta_objset)) <
260 SPA_VERSION_DELEGATED_PERMS) {
261 dsl_dir_close(dd, FTAG);
262 return (ENOTSUP);
263 }
264
265 while (whopair = nvlist_next_nvpair(nvp, whopair))
266 blocks_modified++;
267
268 error = dsl_sync_task_do(dd->dd_pool, NULL,
269 unset ? dsl_deleg_unset_sync : dsl_deleg_set_sync,
270 dd, nvp, blocks_modified);
271 dsl_dir_close(dd, FTAG);
272
273 return (error);
274 }
275
276 /*
277 * Find all 'allow' permissions from a given point and then continue
278 * traversing up to the root.
279 *
280 * This function constructs an nvlist of nvlists.
281 * each setpoint is an nvlist composed of an nvlist of an nvlist
282 * of the individual * users/groups/everyone/create
283 * permissions.
284 *
285 * The nvlist will look like this.
286 *
287 * { source fsname -> { whokeys { permissions,...}, ...}}
288 *
289 * The fsname nvpairs will be arranged in a bottom up order. For example,
290 * if we have the following structure a/b/c then the nvpairs for the fsnames
291 * will be ordered a/b/c, a/b, a.
292 */
293 int
294 dsl_deleg_get(const char *ddname, nvlist_t **nvp)
295 {
296 dsl_dir_t *dd, *startdd;
297 dsl_pool_t *dp;
298 int error;
299 objset_t *mos;
300
301 error = dsl_dir_open(ddname, FTAG, &startdd, NULL);
302 if (error)
303 return (error);
304
305 dp = startdd->dd_pool;
306 mos = dp->dp_meta_objset;
307
308 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
309
310 rw_enter(&dp->dp_config_rwlock, RW_READER);
311 for (dd = startdd; dd != NULL; dd = dd->dd_parent) {
312 zap_cursor_t basezc;
313 zap_attribute_t baseza;
314 nvlist_t *sp_nvp;
315 uint64_t n;
316 char source[MAXNAMELEN];
317
318 if (dd->dd_phys->dd_deleg_zapobj &&
319 (zap_count(mos, dd->dd_phys->dd_deleg_zapobj,
320 &n) == 0) && n) {
321 VERIFY(nvlist_alloc(&sp_nvp,
322 NV_UNIQUE_NAME, KM_SLEEP) == 0);
323 } else {
324 continue;
325 }
326
327 for (zap_cursor_init(&basezc, mos,
328 dd->dd_phys->dd_deleg_zapobj);
329 zap_cursor_retrieve(&basezc, &baseza) == 0;
330 zap_cursor_advance(&basezc)) {
331 zap_cursor_t zc;
332 zap_attribute_t za;
333 nvlist_t *perms_nvp;
334
335 ASSERT(baseza.za_integer_length == 8);
336 ASSERT(baseza.za_num_integers == 1);
337
338 VERIFY(nvlist_alloc(&perms_nvp,
339 NV_UNIQUE_NAME, KM_SLEEP) == 0);
340 for (zap_cursor_init(&zc, mos, baseza.za_first_integer);
341 zap_cursor_retrieve(&zc, &za) == 0;
342 zap_cursor_advance(&zc)) {
343 VERIFY(nvlist_add_boolean(perms_nvp,
344 za.za_name) == 0);
345 }
346 zap_cursor_fini(&zc);
347 VERIFY(nvlist_add_nvlist(sp_nvp, baseza.za_name,
348 perms_nvp) == 0);
349 nvlist_free(perms_nvp);
350 }
351
352 zap_cursor_fini(&basezc);
353
354 dsl_dir_name(dd, source);
355 VERIFY(nvlist_add_nvlist(*nvp, source, sp_nvp) == 0);
356 nvlist_free(sp_nvp);
357 }
358 rw_exit(&dp->dp_config_rwlock);
359
360 dsl_dir_close(startdd, FTAG);
361 return (0);
362 }
363
364 /*
365 * Routines for dsl_deleg_access() -- access checking.
366 */
367 typedef struct perm_set {
368 avl_node_t p_node;
369 boolean_t p_matched;
370 char p_setname[ZFS_MAX_DELEG_NAME];
371 } perm_set_t;
372
373 static int
374 perm_set_compare(const void *arg1, const void *arg2)
375 {
376 const perm_set_t *node1 = arg1;
377 const perm_set_t *node2 = arg2;
378 int val;
379
380 val = strcmp(node1->p_setname, node2->p_setname);
381 if (val == 0)
382 return (0);
383 return (val > 0 ? 1 : -1);
384 }
385
386 /*
387 * Determine whether a specified permission exists.
388 *
389 * First the base attribute has to be retrieved. i.e. ul$12
390 * Once the base object has been retrieved the actual permission
391 * is lookup up in the zap object the base object points to.
392 *
393 * Return 0 if permission exists, ENOENT if there is no whokey, EPERM if
394 * there is no perm in that jumpobj.
395 */
396 static int
397 dsl_check_access(objset_t *mos, uint64_t zapobj,
398 char type, char checkflag, void *valp, const char *perm)
399 {
400 int error;
401 uint64_t jumpobj, zero;
402 char whokey[ZFS_MAX_DELEG_NAME];
403
404 zfs_deleg_whokey(whokey, type, checkflag, valp);
405 error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj);
406 if (error == 0) {
407 error = zap_lookup(mos, jumpobj, perm, 8, 1, &zero);
408 if (error == ENOENT)
409 error = EPERM;
410 }
411 return (error);
412 }
413
414 /*
415 * check a specified user/group for a requested permission
416 */
417 static int
418 dsl_check_user_access(objset_t *mos, uint64_t zapobj, const char *perm,
419 int checkflag, cred_t *cr)
420 {
421 const gid_t *gids;
422 int ngids;
423 int i;
424 uint64_t id;
425
426 /* check for user */
427 id = crgetuid(cr);
428 if (dsl_check_access(mos, zapobj,
429 ZFS_DELEG_USER, checkflag, &id, perm) == 0)
430 return (0);
431
432 /* check for users primary group */
433 id = crgetgid(cr);
434 if (dsl_check_access(mos, zapobj,
435 ZFS_DELEG_GROUP, checkflag, &id, perm) == 0)
436 return (0);
437
438 /* check for everyone entry */
439 id = -1;
440 if (dsl_check_access(mos, zapobj,
441 ZFS_DELEG_EVERYONE, checkflag, &id, perm) == 0)
442 return (0);
443
444 /* check each supplemental group user is a member of */
445 ngids = crgetngroups(cr);
446 gids = crgetgroups(cr);
447 for (i = 0; i != ngids; i++) {
448 id = gids[i];
449 if (dsl_check_access(mos, zapobj,
450 ZFS_DELEG_GROUP, checkflag, &id, perm) == 0)
451 return (0);
452 }
453
454 return (EPERM);
455 }
456
457 /*
458 * Iterate over the sets specified in the specified zapobj
459 * and load them into the permsets avl tree.
460 */
461 static int
462 dsl_load_sets(objset_t *mos, uint64_t zapobj,
463 char type, char checkflag, void *valp, avl_tree_t *avl)
464 {
465 zap_cursor_t zc;
466 zap_attribute_t za;
467 perm_set_t *permnode;
468 avl_index_t idx;
469 uint64_t jumpobj;
470 int error;
471 char whokey[ZFS_MAX_DELEG_NAME];
472
473 zfs_deleg_whokey(whokey, type, checkflag, valp);
474
475 error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj);
476 if (error != 0)
477 return (error);
478
479 for (zap_cursor_init(&zc, mos, jumpobj);
480 zap_cursor_retrieve(&zc, &za) == 0;
481 zap_cursor_advance(&zc)) {
482 permnode = kmem_alloc(sizeof (perm_set_t), KM_SLEEP);
483 (void) strlcpy(permnode->p_setname, za.za_name,
484 sizeof (permnode->p_setname));
485 permnode->p_matched = B_FALSE;
486
487 if (avl_find(avl, permnode, &idx) == NULL) {
488 avl_insert(avl, permnode, idx);
489 } else {
490 kmem_free(permnode, sizeof (perm_set_t));
491 }
492 }
493 zap_cursor_fini(&zc);
494 return (0);
495 }
496
497 /*
498 * Load all permissions user based on cred belongs to.
499 */
500 static void
501 dsl_load_user_sets(objset_t *mos, uint64_t zapobj, avl_tree_t *avl,
502 char checkflag, cred_t *cr)
503 {
504 const gid_t *gids;
505 int ngids, i;
506 uint64_t id;
507
508 id = crgetuid(cr);
509 (void) dsl_load_sets(mos, zapobj,
510 ZFS_DELEG_USER_SETS, checkflag, &id, avl);
511
512 id = crgetgid(cr);
513 (void) dsl_load_sets(mos, zapobj,
514 ZFS_DELEG_GROUP_SETS, checkflag, &id, avl);
515
516 (void) dsl_load_sets(mos, zapobj,
517 ZFS_DELEG_EVERYONE_SETS, checkflag, NULL, avl);
518
519 ngids = crgetngroups(cr);
520 gids = crgetgroups(cr);
521 for (i = 0; i != ngids; i++) {
522 id = gids[i];
523 (void) dsl_load_sets(mos, zapobj,
524 ZFS_DELEG_GROUP_SETS, checkflag, &id, avl);
525 }
526 }
527
528 /*
529 * Check if user has requested permission. If descendent is set, must have
530 * descendent perms.
531 */
532 int
533 dsl_deleg_access_impl(dsl_dataset_t *ds, boolean_t descendent, const char *perm,
534 cred_t *cr)
535 {
536 dsl_dir_t *dd;
537 dsl_pool_t *dp;
538 void *cookie;
539 int error;
540 char checkflag;
541 objset_t *mos;
542 avl_tree_t permsets;
543 perm_set_t *setnode;
544
545 dp = ds->ds_dir->dd_pool;
546 mos = dp->dp_meta_objset;
547
548 if (dsl_delegation_on(mos) == B_FALSE)
549 return (ECANCELED);
550
551 if (spa_version(dmu_objset_spa(dp->dp_meta_objset)) <
552 SPA_VERSION_DELEGATED_PERMS)
553 return (EPERM);
554
555 if (dsl_dataset_is_snapshot(ds) || descendent) {
556 /*
557 * Snapshots are treated as descendents only,
558 * local permissions do not apply.
559 */
560 checkflag = ZFS_DELEG_DESCENDENT;
561 } else {
562 checkflag = ZFS_DELEG_LOCAL;
563 }
564
565 avl_create(&permsets, perm_set_compare, sizeof (perm_set_t),
566 offsetof(perm_set_t, p_node));
567
568 rw_enter(&dp->dp_config_rwlock, RW_READER);
569 for (dd = ds->ds_dir; dd != NULL; dd = dd->dd_parent,
570 checkflag = ZFS_DELEG_DESCENDENT) {
571 uint64_t zapobj;
572 boolean_t expanded;
573
574 /*
575 * If not in global zone then make sure
576 * the zoned property is set
577 */
578 if (!INGLOBALZONE(curproc)) {
579 uint64_t zoned;
580
581 if (dsl_prop_get_dd(dd,
582 zfs_prop_to_name(ZFS_PROP_ZONED),
583 8, 1, &zoned, NULL, B_FALSE) != 0)
584 break;
585 if (!zoned)
586 break;
587 }
588 zapobj = dd->dd_phys->dd_deleg_zapobj;
589
590 if (zapobj == 0)
591 continue;
592
593 dsl_load_user_sets(mos, zapobj, &permsets, checkflag, cr);
594 again:
595 expanded = B_FALSE;
596 for (setnode = avl_first(&permsets); setnode;
597 setnode = AVL_NEXT(&permsets, setnode)) {
598 if (setnode->p_matched == B_TRUE)
599 continue;
600
601 /* See if this set directly grants this permission */
602 error = dsl_check_access(mos, zapobj,
603 ZFS_DELEG_NAMED_SET, 0, setnode->p_setname, perm);
604 if (error == 0)
605 goto success;
606 if (error == EPERM)
607 setnode->p_matched = B_TRUE;
608
609 /* See if this set includes other sets */
610 error = dsl_load_sets(mos, zapobj,
611 ZFS_DELEG_NAMED_SET_SETS, 0,
612 setnode->p_setname, &permsets);
613 if (error == 0)
614 setnode->p_matched = expanded = B_TRUE;
615 }
616 /*
617 * If we expanded any sets, that will define more sets,
618 * which we need to check.
619 */
620 if (expanded)
621 goto again;
622
623 error = dsl_check_user_access(mos, zapobj, perm, checkflag, cr);
624 if (error == 0)
625 goto success;
626 }
627 error = EPERM;
628 success:
629 rw_exit(&dp->dp_config_rwlock);
630
631 cookie = NULL;
632 while ((setnode = avl_destroy_nodes(&permsets, &cookie)) != NULL)
633 kmem_free(setnode, sizeof (perm_set_t));
634
635 return (error);
636 }
637
638 int
639 dsl_deleg_access(const char *dsname, const char *perm, cred_t *cr)
640 {
641 dsl_dataset_t *ds;
642 int error;
643
644 error = dsl_dataset_hold(dsname, FTAG, &ds);
645 if (error)
646 return (error);
647
648 error = dsl_deleg_access_impl(ds, B_FALSE, perm, cr);
649 dsl_dataset_rele(ds, FTAG);
650
651 return (error);
652 }
653
654 /*
655 * Other routines.
656 */
657
658 static void
659 copy_create_perms(dsl_dir_t *dd, uint64_t pzapobj,
660 boolean_t dosets, uint64_t uid, dmu_tx_t *tx)
661 {
662 objset_t *mos = dd->dd_pool->dp_meta_objset;
663 uint64_t jumpobj, pjumpobj;
664 uint64_t zapobj = dd->dd_phys->dd_deleg_zapobj;
665 zap_cursor_t zc;
666 zap_attribute_t za;
667 char whokey[ZFS_MAX_DELEG_NAME];
668
669 zfs_deleg_whokey(whokey,
670 dosets ? ZFS_DELEG_CREATE_SETS : ZFS_DELEG_CREATE,
671 ZFS_DELEG_LOCAL, NULL);
672 if (zap_lookup(mos, pzapobj, whokey, 8, 1, &pjumpobj) != 0)
673 return;
674
675 if (zapobj == 0) {
676 dmu_buf_will_dirty(dd->dd_dbuf, tx);
677 zapobj = dd->dd_phys->dd_deleg_zapobj = zap_create(mos,
678 DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx);
679 }
680
681 zfs_deleg_whokey(whokey,
682 dosets ? ZFS_DELEG_USER_SETS : ZFS_DELEG_USER,
683 ZFS_DELEG_LOCAL, &uid);
684 if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) == ENOENT) {
685 jumpobj = zap_create(mos, DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx);
686 VERIFY(zap_add(mos, zapobj, whokey, 8, 1, &jumpobj, tx) == 0);
687 }
688
689 for (zap_cursor_init(&zc, mos, pjumpobj);
690 zap_cursor_retrieve(&zc, &za) == 0;
691 zap_cursor_advance(&zc)) {
692 uint64_t zero = 0;
693 ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1);
694
695 VERIFY(zap_update(mos, jumpobj, za.za_name,
696 8, 1, &zero, tx) == 0);
697 }
698 zap_cursor_fini(&zc);
699 }
700
701 /*
702 * set all create time permission on new dataset.
703 */
704 void
705 dsl_deleg_set_create_perms(dsl_dir_t *sdd, dmu_tx_t *tx, cred_t *cr)
706 {
707 dsl_dir_t *dd;
708 uint64_t uid = crgetuid(cr);
709
710 if (spa_version(dmu_objset_spa(sdd->dd_pool->dp_meta_objset)) <
711 SPA_VERSION_DELEGATED_PERMS)
712 return;
713
714 for (dd = sdd->dd_parent; dd != NULL; dd = dd->dd_parent) {
715 uint64_t pzapobj = dd->dd_phys->dd_deleg_zapobj;
716
717 if (pzapobj == 0)
718 continue;
719
720 copy_create_perms(sdd, pzapobj, B_FALSE, uid, tx);
721 copy_create_perms(sdd, pzapobj, B_TRUE, uid, tx);
722 }
723 }
724
725 int
726 dsl_deleg_destroy(objset_t *mos, uint64_t zapobj, dmu_tx_t *tx)
727 {
728 zap_cursor_t zc;
729 zap_attribute_t za;
730
731 if (zapobj == 0)
732 return (0);
733
734 for (zap_cursor_init(&zc, mos, zapobj);
735 zap_cursor_retrieve(&zc, &za) == 0;
736 zap_cursor_advance(&zc)) {
737 ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1);
738 VERIFY(0 == zap_destroy(mos, za.za_first_integer, tx));
739 }
740 zap_cursor_fini(&zc);
741 VERIFY(0 == zap_destroy(mos, zapobj, tx));
742 return (0);
743 }
744
745 boolean_t
746 dsl_delegation_on(objset_t *os)
747 {
748 return (!!spa_delegation(os->os_spa));
749 }