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) 2012 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_link(mos, DMU_OT_DSL_PERMS,
175 zapobj, whokey, tx);
176 }
177
178 while (permpair = nvlist_next_nvpair(perms, permpair)) {
179 const char *perm = nvpair_name(permpair);
180 uint64_t n = 0;
181
182 VERIFY(zap_update(mos, jumpobj,
183 perm, 8, 1, &n, tx) == 0);
184 spa_history_log_internal(LOG_DS_PERM_UPDATE,
185 dd->dd_pool->dp_spa, tx,
186 "%s %s dataset = %llu", whokey, perm,
187 dd->dd_phys->dd_head_dataset_obj);
188 }
189 }
190 }
191
192 static void
193 dsl_deleg_unset_sync(void *arg1, void *arg2, dmu_tx_t *tx)
194 {
195 dsl_dir_t *dd = arg1;
196 nvlist_t *nvp = arg2;
197 objset_t *mos = dd->dd_pool->dp_meta_objset;
198 nvpair_t *whopair = NULL;
199 uint64_t zapobj = dd->dd_phys->dd_deleg_zapobj;
200
201 if (zapobj == 0)
202 return;
203
204 while (whopair = nvlist_next_nvpair(nvp, whopair)) {
205 const char *whokey = nvpair_name(whopair);
206 nvlist_t *perms;
207 nvpair_t *permpair = NULL;
208 uint64_t jumpobj;
209
210 if (nvpair_value_nvlist(whopair, &perms) != 0) {
211 if (zap_lookup(mos, zapobj, whokey, 8,
212 1, &jumpobj) == 0) {
213 (void) zap_remove(mos, zapobj, whokey, tx);
214 VERIFY(0 == zap_destroy(mos, jumpobj, tx));
215 }
216 spa_history_log_internal(LOG_DS_PERM_WHO_REMOVE,
217 dd->dd_pool->dp_spa, tx,
218 "%s dataset = %llu", whokey,
219 dd->dd_phys->dd_head_dataset_obj);
220 continue;
221 }
222
223 if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0)
224 continue;
225
226 while (permpair = nvlist_next_nvpair(perms, permpair)) {
227 const char *perm = nvpair_name(permpair);
228 uint64_t n = 0;
229
230 (void) zap_remove(mos, jumpobj, perm, tx);
231 if (zap_count(mos, jumpobj, &n) == 0 && n == 0) {
232 (void) zap_remove(mos, zapobj,
233 whokey, tx);
234 VERIFY(0 == zap_destroy(mos,
235 jumpobj, tx));
236 }
237 spa_history_log_internal(LOG_DS_PERM_REMOVE,
238 dd->dd_pool->dp_spa, tx,
239 "%s %s dataset = %llu", whokey, perm,
240 dd->dd_phys->dd_head_dataset_obj);
241 }
242 }
243 }
244
245 int
246 dsl_deleg_set(const char *ddname, nvlist_t *nvp, boolean_t unset)
247 {
248 dsl_dir_t *dd;
249 int error;
250 nvpair_t *whopair = NULL;
251 int blocks_modified = 0;
252
253 error = dsl_dir_open(ddname, FTAG, &dd, NULL);
254 if (error)
255 return (error);
256
257 if (spa_version(dmu_objset_spa(dd->dd_pool->dp_meta_objset)) <
258 SPA_VERSION_DELEGATED_PERMS) {
259 dsl_dir_close(dd, FTAG);
260 return (ENOTSUP);
261 }
262
263 while (whopair = nvlist_next_nvpair(nvp, whopair))
264 blocks_modified++;
265
266 error = dsl_sync_task_do(dd->dd_pool, NULL,
267 unset ? dsl_deleg_unset_sync : dsl_deleg_set_sync,
268 dd, nvp, blocks_modified);
269 dsl_dir_close(dd, FTAG);
270
271 return (error);
272 }
273
274 /*
275 * Find all 'allow' permissions from a given point and then continue
276 * traversing up to the root.
277 *
278 * This function constructs an nvlist of nvlists.
279 * each setpoint is an nvlist composed of an nvlist of an nvlist
280 * of the individual * users/groups/everyone/create
281 * permissions.
282 *
283 * The nvlist will look like this.
284 *
285 * { source fsname -> { whokeys { permissions,...}, ...}}
286 *
287 * The fsname nvpairs will be arranged in a bottom up order. For example,
288 * if we have the following structure a/b/c then the nvpairs for the fsnames
289 * will be ordered a/b/c, a/b, a.
290 */
291 int
292 dsl_deleg_get(const char *ddname, nvlist_t **nvp)
293 {
294 dsl_dir_t *dd, *startdd;
295 dsl_pool_t *dp;
296 int error;
297 objset_t *mos;
298
299 error = dsl_dir_open(ddname, FTAG, &startdd, NULL);
300 if (error)
301 return (error);
302
303 dp = startdd->dd_pool;
304 mos = dp->dp_meta_objset;
305
306 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
307
308 rw_enter(&dp->dp_config_rwlock, RW_READER);
309 for (dd = startdd; dd != NULL; dd = dd->dd_parent) {
310 zap_cursor_t basezc;
311 zap_attribute_t baseza;
312 nvlist_t *sp_nvp;
313 uint64_t n;
314 char source[MAXNAMELEN];
315
316 if (dd->dd_phys->dd_deleg_zapobj &&
317 (zap_count(mos, dd->dd_phys->dd_deleg_zapobj,
318 &n) == 0) && n) {
319 VERIFY(nvlist_alloc(&sp_nvp,
320 NV_UNIQUE_NAME, KM_SLEEP) == 0);
321 } else {
322 continue;
323 }
324
325 for (zap_cursor_init(&basezc, mos,
326 dd->dd_phys->dd_deleg_zapobj);
327 zap_cursor_retrieve(&basezc, &baseza) == 0;
328 zap_cursor_advance(&basezc)) {
329 zap_cursor_t zc;
330 zap_attribute_t za;
331 nvlist_t *perms_nvp;
332
333 ASSERT(baseza.za_integer_length == 8);
334 ASSERT(baseza.za_num_integers == 1);
335
336 VERIFY(nvlist_alloc(&perms_nvp,
337 NV_UNIQUE_NAME, KM_SLEEP) == 0);
338 for (zap_cursor_init(&zc, mos, baseza.za_first_integer);
339 zap_cursor_retrieve(&zc, &za) == 0;
340 zap_cursor_advance(&zc)) {
341 VERIFY(nvlist_add_boolean(perms_nvp,
342 za.za_name) == 0);
343 }
344 zap_cursor_fini(&zc);
345 VERIFY(nvlist_add_nvlist(sp_nvp, baseza.za_name,
346 perms_nvp) == 0);
347 nvlist_free(perms_nvp);
348 }
349
350 zap_cursor_fini(&basezc);
351
352 dsl_dir_name(dd, source);
353 VERIFY(nvlist_add_nvlist(*nvp, source, sp_nvp) == 0);
354 nvlist_free(sp_nvp);
355 }
356 rw_exit(&dp->dp_config_rwlock);
357
358 dsl_dir_close(startdd, FTAG);
359 return (0);
360 }
361
362 /*
363 * Routines for dsl_deleg_access() -- access checking.
364 */
365 typedef struct perm_set {
366 avl_node_t p_node;
367 boolean_t p_matched;
368 char p_setname[ZFS_MAX_DELEG_NAME];
369 } perm_set_t;
370
371 static int
372 perm_set_compare(const void *arg1, const void *arg2)
373 {
374 const perm_set_t *node1 = arg1;
375 const perm_set_t *node2 = arg2;
376 int val;
377
378 val = strcmp(node1->p_setname, node2->p_setname);
379 if (val == 0)
380 return (0);
381 return (val > 0 ? 1 : -1);
382 }
383
384 /*
385 * Determine whether a specified permission exists.
386 *
387 * First the base attribute has to be retrieved. i.e. ul$12
388 * Once the base object has been retrieved the actual permission
389 * is lookup up in the zap object the base object points to.
390 *
391 * Return 0 if permission exists, ENOENT if there is no whokey, EPERM if
392 * there is no perm in that jumpobj.
393 */
394 static int
395 dsl_check_access(objset_t *mos, uint64_t zapobj,
396 char type, char checkflag, void *valp, const char *perm)
397 {
398 int error;
399 uint64_t jumpobj, zero;
400 char whokey[ZFS_MAX_DELEG_NAME];
401
402 zfs_deleg_whokey(whokey, type, checkflag, valp);
403 error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj);
404 if (error == 0) {
405 error = zap_lookup(mos, jumpobj, perm, 8, 1, &zero);
406 if (error == ENOENT)
407 error = EPERM;
408 }
409 return (error);
410 }
411
412 /*
413 * check a specified user/group for a requested permission
414 */
415 static int
416 dsl_check_user_access(objset_t *mos, uint64_t zapobj, const char *perm,
417 int checkflag, cred_t *cr)
418 {
419 const gid_t *gids;
420 int ngids;
421 int i;
422 uint64_t id;
423
424 /* check for user */
425 id = crgetuid(cr);
426 if (dsl_check_access(mos, zapobj,
427 ZFS_DELEG_USER, checkflag, &id, perm) == 0)
428 return (0);
429
430 /* check for users primary group */
431 id = crgetgid(cr);
432 if (dsl_check_access(mos, zapobj,
433 ZFS_DELEG_GROUP, checkflag, &id, perm) == 0)
434 return (0);
435
436 /* check for everyone entry */
437 id = -1;
438 if (dsl_check_access(mos, zapobj,
439 ZFS_DELEG_EVERYONE, checkflag, &id, perm) == 0)
440 return (0);
441
442 /* check each supplemental group user is a member of */
443 ngids = crgetngroups(cr);
444 gids = crgetgroups(cr);
445 for (i = 0; i != ngids; i++) {
446 id = gids[i];
447 if (dsl_check_access(mos, zapobj,
448 ZFS_DELEG_GROUP, checkflag, &id, perm) == 0)
449 return (0);
450 }
451
452 return (EPERM);
453 }
454
455 /*
456 * Iterate over the sets specified in the specified zapobj
457 * and load them into the permsets avl tree.
458 */
459 static int
460 dsl_load_sets(objset_t *mos, uint64_t zapobj,
461 char type, char checkflag, void *valp, avl_tree_t *avl)
462 {
463 zap_cursor_t zc;
464 zap_attribute_t za;
465 perm_set_t *permnode;
466 avl_index_t idx;
467 uint64_t jumpobj;
468 int error;
469 char whokey[ZFS_MAX_DELEG_NAME];
470
471 zfs_deleg_whokey(whokey, type, checkflag, valp);
472
473 error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj);
474 if (error != 0)
475 return (error);
476
477 for (zap_cursor_init(&zc, mos, jumpobj);
478 zap_cursor_retrieve(&zc, &za) == 0;
479 zap_cursor_advance(&zc)) {
480 permnode = kmem_alloc(sizeof (perm_set_t), KM_SLEEP);
481 (void) strlcpy(permnode->p_setname, za.za_name,
482 sizeof (permnode->p_setname));
483 permnode->p_matched = B_FALSE;
484
485 if (avl_find(avl, permnode, &idx) == NULL) {
486 avl_insert(avl, permnode, idx);
487 } else {
488 kmem_free(permnode, sizeof (perm_set_t));
489 }
490 }
491 zap_cursor_fini(&zc);
492 return (0);
493 }
494
495 /*
496 * Load all permissions user based on cred belongs to.
497 */
498 static void
499 dsl_load_user_sets(objset_t *mos, uint64_t zapobj, avl_tree_t *avl,
500 char checkflag, cred_t *cr)
501 {
502 const gid_t *gids;
503 int ngids, i;
504 uint64_t id;
505
506 id = crgetuid(cr);
507 (void) dsl_load_sets(mos, zapobj,
508 ZFS_DELEG_USER_SETS, checkflag, &id, avl);
509
510 id = crgetgid(cr);
511 (void) dsl_load_sets(mos, zapobj,
512 ZFS_DELEG_GROUP_SETS, checkflag, &id, avl);
513
514 (void) dsl_load_sets(mos, zapobj,
515 ZFS_DELEG_EVERYONE_SETS, checkflag, NULL, avl);
516
517 ngids = crgetngroups(cr);
518 gids = crgetgroups(cr);
519 for (i = 0; i != ngids; i++) {
520 id = gids[i];
521 (void) dsl_load_sets(mos, zapobj,
522 ZFS_DELEG_GROUP_SETS, checkflag, &id, avl);
523 }
524 }
525
526 /*
527 * Check if user has requested permission. If descendent is set, must have
528 * descendent perms.
529 */
530 int
531 dsl_deleg_access_impl(dsl_dataset_t *ds, boolean_t descendent, const char *perm,
532 cred_t *cr)
533 {
534 dsl_dir_t *dd;
535 dsl_pool_t *dp;
536 void *cookie;
537 int error;
538 char checkflag;
539 objset_t *mos;
540 avl_tree_t permsets;
541 perm_set_t *setnode;
542
543 dp = ds->ds_dir->dd_pool;
544 mos = dp->dp_meta_objset;
545
546 if (dsl_delegation_on(mos) == B_FALSE)
547 return (ECANCELED);
548
549 if (spa_version(dmu_objset_spa(dp->dp_meta_objset)) <
550 SPA_VERSION_DELEGATED_PERMS)
551 return (EPERM);
552
553 if (dsl_dataset_is_snapshot(ds) || descendent) {
554 /*
555 * Snapshots are treated as descendents only,
556 * local permissions do not apply.
557 */
558 checkflag = ZFS_DELEG_DESCENDENT;
559 } else {
560 checkflag = ZFS_DELEG_LOCAL;
561 }
562
563 avl_create(&permsets, perm_set_compare, sizeof (perm_set_t),
564 offsetof(perm_set_t, p_node));
565
566 rw_enter(&dp->dp_config_rwlock, RW_READER);
567 for (dd = ds->ds_dir; dd != NULL; dd = dd->dd_parent,
568 checkflag = ZFS_DELEG_DESCENDENT) {
569 uint64_t zapobj;
570 boolean_t expanded;
571
572 /*
573 * If not in global zone then make sure
574 * the zoned property is set
575 */
576 if (!INGLOBALZONE(curproc)) {
577 uint64_t zoned;
578
579 if (dsl_prop_get_dd(dd,
580 zfs_prop_to_name(ZFS_PROP_ZONED),
581 8, 1, &zoned, NULL, B_FALSE) != 0)
582 break;
583 if (!zoned)
584 break;
585 }
586 zapobj = dd->dd_phys->dd_deleg_zapobj;
587
588 if (zapobj == 0)
589 continue;
590
591 dsl_load_user_sets(mos, zapobj, &permsets, checkflag, cr);
592 again:
593 expanded = B_FALSE;
594 for (setnode = avl_first(&permsets); setnode;
595 setnode = AVL_NEXT(&permsets, setnode)) {
596 if (setnode->p_matched == B_TRUE)
597 continue;
598
599 /* See if this set directly grants this permission */
600 error = dsl_check_access(mos, zapobj,
601 ZFS_DELEG_NAMED_SET, 0, setnode->p_setname, perm);
602 if (error == 0)
603 goto success;
604 if (error == EPERM)
605 setnode->p_matched = B_TRUE;
606
607 /* See if this set includes other sets */
608 error = dsl_load_sets(mos, zapobj,
609 ZFS_DELEG_NAMED_SET_SETS, 0,
610 setnode->p_setname, &permsets);
611 if (error == 0)
612 setnode->p_matched = expanded = B_TRUE;
613 }
614 /*
615 * If we expanded any sets, that will define more sets,
616 * which we need to check.
617 */
618 if (expanded)
619 goto again;
620
621 error = dsl_check_user_access(mos, zapobj, perm, checkflag, cr);
622 if (error == 0)
623 goto success;
624 }
625 error = EPERM;
626 success:
627 rw_exit(&dp->dp_config_rwlock);
628
629 cookie = NULL;
630 while ((setnode = avl_destroy_nodes(&permsets, &cookie)) != NULL)
631 kmem_free(setnode, sizeof (perm_set_t));
632
633 return (error);
634 }
635
636 int
637 dsl_deleg_access(const char *dsname, const char *perm, cred_t *cr)
638 {
639 dsl_dataset_t *ds;
640 int error;
641
642 error = dsl_dataset_hold(dsname, FTAG, &ds);
643 if (error)
644 return (error);
645
646 error = dsl_deleg_access_impl(ds, B_FALSE, perm, cr);
647 dsl_dataset_rele(ds, FTAG);
648
649 return (error);
650 }
651
652 /*
653 * Other routines.
654 */
655
656 static void
657 copy_create_perms(dsl_dir_t *dd, uint64_t pzapobj,
658 boolean_t dosets, uint64_t uid, dmu_tx_t *tx)
659 {
660 objset_t *mos = dd->dd_pool->dp_meta_objset;
661 uint64_t jumpobj, pjumpobj;
662 uint64_t zapobj = dd->dd_phys->dd_deleg_zapobj;
663 zap_cursor_t zc;
664 zap_attribute_t za;
665 char whokey[ZFS_MAX_DELEG_NAME];
666
667 zfs_deleg_whokey(whokey,
668 dosets ? ZFS_DELEG_CREATE_SETS : ZFS_DELEG_CREATE,
669 ZFS_DELEG_LOCAL, NULL);
670 if (zap_lookup(mos, pzapobj, whokey, 8, 1, &pjumpobj) != 0)
671 return;
672
673 if (zapobj == 0) {
674 dmu_buf_will_dirty(dd->dd_dbuf, tx);
675 zapobj = dd->dd_phys->dd_deleg_zapobj = zap_create(mos,
676 DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx);
677 }
678
679 zfs_deleg_whokey(whokey,
680 dosets ? ZFS_DELEG_USER_SETS : ZFS_DELEG_USER,
681 ZFS_DELEG_LOCAL, &uid);
682 if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) == ENOENT) {
683 jumpobj = zap_create(mos, DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx);
684 VERIFY(zap_add(mos, zapobj, whokey, 8, 1, &jumpobj, tx) == 0);
685 }
686
687 for (zap_cursor_init(&zc, mos, pjumpobj);
688 zap_cursor_retrieve(&zc, &za) == 0;
689 zap_cursor_advance(&zc)) {
690 uint64_t zero = 0;
691 ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1);
692
693 VERIFY(zap_update(mos, jumpobj, za.za_name,
694 8, 1, &zero, tx) == 0);
695 }
696 zap_cursor_fini(&zc);
697 }
698
699 /*
700 * set all create time permission on new dataset.
701 */
702 void
703 dsl_deleg_set_create_perms(dsl_dir_t *sdd, dmu_tx_t *tx, cred_t *cr)
704 {
705 dsl_dir_t *dd;
706 uint64_t uid = crgetuid(cr);
707
708 if (spa_version(dmu_objset_spa(sdd->dd_pool->dp_meta_objset)) <
709 SPA_VERSION_DELEGATED_PERMS)
710 return;
711
712 for (dd = sdd->dd_parent; dd != NULL; dd = dd->dd_parent) {
713 uint64_t pzapobj = dd->dd_phys->dd_deleg_zapobj;
714
715 if (pzapobj == 0)
716 continue;
717
718 copy_create_perms(sdd, pzapobj, B_FALSE, uid, tx);
719 copy_create_perms(sdd, pzapobj, B_TRUE, uid, tx);
720 }
721 }
722
723 int
724 dsl_deleg_destroy(objset_t *mos, uint64_t zapobj, dmu_tx_t *tx)
725 {
726 zap_cursor_t zc;
727 zap_attribute_t za;
728
729 if (zapobj == 0)
730 return (0);
731
732 for (zap_cursor_init(&zc, mos, zapobj);
733 zap_cursor_retrieve(&zc, &za) == 0;
734 zap_cursor_advance(&zc)) {
735 ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1);
736 VERIFY(0 == zap_destroy(mos, za.za_first_integer, tx));
737 }
738 zap_cursor_fini(&zc);
739 VERIFY(0 == zap_destroy(mos, zapobj, tx));
740 return (0);
741 }
742
743 boolean_t
744 dsl_delegation_on(objset_t *os)
745 {
746 return (!!spa_delegation(os->os_spa));
747 }