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, 2015 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 */ 91int 92dsl_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 (SET_ERROR(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 */ 124int 125dsl_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 (SET_ERROR(EPERM)); 143 144 if (strcmp(idstr, &nvpair_name(whopair)[3]) != 0) 145 return (SET_ERROR(EPERM)); 146 } 147 return (0); 148} 149 150typedef struct dsl_deleg_arg { 151 const char *dda_name; 152 nvlist_t *dda_nvlist; 153} dsl_deleg_arg_t; 154 155static void 156dsl_deleg_set_sync(void *arg, dmu_tx_t *tx) 157{ 158 dsl_deleg_arg_t *dda = arg; 159 dsl_dir_t *dd; 160 dsl_pool_t *dp = dmu_tx_pool(tx); 161 objset_t *mos = dp->dp_meta_objset; 162 nvpair_t *whopair = NULL; 163 uint64_t zapobj; 164 165 VERIFY0(dsl_dir_hold(dp, dda->dda_name, FTAG, &dd, NULL)); 166 167 zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; 168 if (zapobj == 0) { 169 dmu_buf_will_dirty(dd->dd_dbuf, tx); 170 zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj = zap_create(mos, 171 DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx); 172 } 173 174 while (whopair = nvlist_next_nvpair(dda->dda_nvlist, whopair)) { 175 const char *whokey = nvpair_name(whopair); 176 nvlist_t *perms; 177 nvpair_t *permpair = NULL; 178 uint64_t jumpobj; 179 180 perms = fnvpair_value_nvlist(whopair); 181 182 if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0) { 183 jumpobj = zap_create_link(mos, DMU_OT_DSL_PERMS, 184 zapobj, whokey, tx); 185 } 186 187 while (permpair = nvlist_next_nvpair(perms, permpair)) { 188 const char *perm = nvpair_name(permpair); 189 uint64_t n = 0; 190 191 VERIFY(zap_update(mos, jumpobj, 192 perm, 8, 1, &n, tx) == 0); 193 spa_history_log_internal_dd(dd, "permission update", tx, 194 "%s %s", whokey, perm); 195 } 196 } 197 dsl_dir_rele(dd, FTAG); 198} 199 200static void 201dsl_deleg_unset_sync(void *arg, dmu_tx_t *tx) 202{ 203 dsl_deleg_arg_t *dda = arg; 204 dsl_dir_t *dd; 205 dsl_pool_t *dp = dmu_tx_pool(tx); 206 objset_t *mos = dp->dp_meta_objset; 207 nvpair_t *whopair = NULL; 208 uint64_t zapobj; 209 210 VERIFY0(dsl_dir_hold(dp, dda->dda_name, FTAG, &dd, NULL)); 211 zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; 212 if (zapobj == 0) { 213 dsl_dir_rele(dd, FTAG); 214 return; 215 } 216 217 while (whopair = nvlist_next_nvpair(dda->dda_nvlist, whopair)) { 218 const char *whokey = nvpair_name(whopair); 219 nvlist_t *perms; 220 nvpair_t *permpair = NULL; 221 uint64_t jumpobj; 222 223 if (nvpair_value_nvlist(whopair, &perms) != 0) { 224 if (zap_lookup(mos, zapobj, whokey, 8, 225 1, &jumpobj) == 0) { 226 (void) zap_remove(mos, zapobj, whokey, tx); 227 VERIFY(0 == zap_destroy(mos, jumpobj, tx)); 228 } 229 spa_history_log_internal_dd(dd, "permission who remove", 230 tx, "%s", whokey); 231 continue; 232 } 233 234 if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0) 235 continue; 236 237 while (permpair = nvlist_next_nvpair(perms, permpair)) { 238 const char *perm = nvpair_name(permpair); 239 uint64_t n = 0; 240 241 (void) zap_remove(mos, jumpobj, perm, tx); 242 if (zap_count(mos, jumpobj, &n) == 0 && n == 0) { 243 (void) zap_remove(mos, zapobj, 244 whokey, tx); 245 VERIFY(0 == zap_destroy(mos, 246 jumpobj, tx)); 247 } 248 spa_history_log_internal_dd(dd, "permission remove", tx, 249 "%s %s", whokey, perm); 250 } 251 } 252 dsl_dir_rele(dd, FTAG); 253} 254 255static int 256dsl_deleg_check(void *arg, dmu_tx_t *tx) 257{ 258 dsl_deleg_arg_t *dda = arg; 259 dsl_dir_t *dd; 260 int error; 261 262 if (spa_version(dmu_tx_pool(tx)->dp_spa) < 263 SPA_VERSION_DELEGATED_PERMS) { 264 return (SET_ERROR(ENOTSUP)); 265 } 266 267 error = dsl_dir_hold(dmu_tx_pool(tx), dda->dda_name, FTAG, &dd, NULL); 268 if (error == 0) 269 dsl_dir_rele(dd, FTAG); 270 return (error); 271} 272 273int 274dsl_deleg_set(const char *ddname, nvlist_t *nvp, boolean_t unset) 275{ 276 dsl_deleg_arg_t dda; 277 278 /* nvp must already have been verified to be valid */ 279 280 dda.dda_name = ddname; 281 dda.dda_nvlist = nvp; 282 283 return (dsl_sync_task(ddname, dsl_deleg_check, 284 unset ? dsl_deleg_unset_sync : dsl_deleg_set_sync, 285 &dda, fnvlist_num_pairs(nvp), ZFS_SPACE_CHECK_RESERVED)); 286} 287 288/* 289 * Find all 'allow' permissions from a given point and then continue 290 * traversing up to the root. 291 * 292 * This function constructs an nvlist of nvlists. 293 * each setpoint is an nvlist composed of an nvlist of an nvlist 294 * of the individual * users/groups/everyone/create 295 * permissions. 296 * 297 * The nvlist will look like this. 298 * 299 * { source fsname -> { whokeys { permissions,...}, ...}} 300 * 301 * The fsname nvpairs will be arranged in a bottom up order. For example, 302 * if we have the following structure a/b/c then the nvpairs for the fsnames 303 * will be ordered a/b/c, a/b, a. 304 */ 305int 306dsl_deleg_get(const char *ddname, nvlist_t **nvp) 307{ 308 dsl_dir_t *dd, *startdd; 309 dsl_pool_t *dp; 310 int error; 311 objset_t *mos; 312 313 error = dsl_pool_hold(ddname, FTAG, &dp); 314 if (error != 0) 315 return (error); 316 317 error = dsl_dir_hold(dp, ddname, FTAG, &startdd, NULL); 318 if (error != 0) { 319 dsl_pool_rele(dp, FTAG); 320 return (error); 321 } 322 323 dp = startdd->dd_pool; 324 mos = dp->dp_meta_objset; 325 326 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 327 328 for (dd = startdd; dd != NULL; dd = dd->dd_parent) { 329 zap_cursor_t basezc; 330 zap_attribute_t baseza; 331 nvlist_t *sp_nvp; 332 uint64_t n; 333 char source[ZFS_MAX_DATASET_NAME_LEN]; 334 335 if (dsl_dir_phys(dd)->dd_deleg_zapobj == 0 || 336 zap_count(mos, 337 dsl_dir_phys(dd)->dd_deleg_zapobj, &n) != 0 || n == 0) 338 continue; 339 340 sp_nvp = fnvlist_alloc(); 341 for (zap_cursor_init(&basezc, mos, 342 dsl_dir_phys(dd)->dd_deleg_zapobj); 343 zap_cursor_retrieve(&basezc, &baseza) == 0; 344 zap_cursor_advance(&basezc)) { 345 zap_cursor_t zc; 346 zap_attribute_t za; 347 nvlist_t *perms_nvp; 348 349 ASSERT(baseza.za_integer_length == 8); 350 ASSERT(baseza.za_num_integers == 1); 351 352 perms_nvp = fnvlist_alloc(); 353 for (zap_cursor_init(&zc, mos, baseza.za_first_integer); 354 zap_cursor_retrieve(&zc, &za) == 0; 355 zap_cursor_advance(&zc)) { 356 fnvlist_add_boolean(perms_nvp, za.za_name); 357 } 358 zap_cursor_fini(&zc); 359 fnvlist_add_nvlist(sp_nvp, baseza.za_name, perms_nvp); 360 fnvlist_free(perms_nvp); 361 } 362 363 zap_cursor_fini(&basezc); 364 365 dsl_dir_name(dd, source); 366 fnvlist_add_nvlist(*nvp, source, sp_nvp); 367 nvlist_free(sp_nvp); 368 } 369 370 dsl_dir_rele(startdd, FTAG); 371 dsl_pool_rele(dp, FTAG); 372 return (0); 373} 374 375/* 376 * Routines for dsl_deleg_access() -- access checking. 377 */ 378typedef struct perm_set { 379 avl_node_t p_node; 380 boolean_t p_matched; 381 char p_setname[ZFS_MAX_DELEG_NAME]; 382} perm_set_t; 383 384static int 385perm_set_compare(const void *arg1, const void *arg2) 386{ 387 const perm_set_t *node1 = (const perm_set_t *)arg1; 388 const perm_set_t *node2 = (const perm_set_t *)arg2; 389 int val; 390 391 val = strcmp(node1->p_setname, node2->p_setname); 392 393 return (AVL_ISIGN(val)); 394} 395 396/* 397 * Determine whether a specified permission exists. 398 * 399 * First the base attribute has to be retrieved. i.e. ul$12 400 * Once the base object has been retrieved the actual permission 401 * is lookup up in the zap object the base object points to. 402 * 403 * Return 0 if permission exists, ENOENT if there is no whokey, EPERM if 404 * there is no perm in that jumpobj. 405 */ 406static int 407dsl_check_access(objset_t *mos, uint64_t zapobj, 408 char type, char checkflag, void *valp, const char *perm) 409{ 410 int error; 411 uint64_t jumpobj, zero; 412 char whokey[ZFS_MAX_DELEG_NAME]; 413 414 zfs_deleg_whokey(whokey, type, checkflag, valp); 415 error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj); 416 if (error == 0) { 417 error = zap_lookup(mos, jumpobj, perm, 8, 1, &zero); 418 if (error == ENOENT) 419 error = SET_ERROR(EPERM); 420 } 421 return (error); 422} 423 424/* 425 * check a specified user/group for a requested permission 426 */ 427static int 428dsl_check_user_access(objset_t *mos, uint64_t zapobj, const char *perm, 429 int checkflag, cred_t *cr) 430{ 431 const gid_t *gids; 432 int ngids; 433 int i; 434 uint64_t id; 435 436 /* check for user */ 437 id = crgetuid(cr); 438 if (dsl_check_access(mos, zapobj, 439 ZFS_DELEG_USER, checkflag, &id, perm) == 0) 440 return (0); 441 442 /* check for users primary group */ 443 id = crgetgid(cr); 444 if (dsl_check_access(mos, zapobj, 445 ZFS_DELEG_GROUP, checkflag, &id, perm) == 0) 446 return (0); 447 448 /* check for everyone entry */ 449 id = -1; 450 if (dsl_check_access(mos, zapobj, 451 ZFS_DELEG_EVERYONE, checkflag, &id, perm) == 0) 452 return (0); 453 454 /* check each supplemental group user is a member of */ 455 ngids = crgetngroups(cr); 456 gids = crgetgroups(cr); 457 for (i = 0; i != ngids; i++) { 458 id = gids[i]; 459 if (dsl_check_access(mos, zapobj, 460 ZFS_DELEG_GROUP, checkflag, &id, perm) == 0) 461 return (0); 462 } 463 464 return (SET_ERROR(EPERM)); 465} 466 467/* 468 * Iterate over the sets specified in the specified zapobj 469 * and load them into the permsets avl tree. 470 */ 471static int 472dsl_load_sets(objset_t *mos, uint64_t zapobj, 473 char type, char checkflag, void *valp, avl_tree_t *avl) 474{ 475 zap_cursor_t zc; 476 zap_attribute_t za; 477 perm_set_t *permnode; 478 avl_index_t idx; 479 uint64_t jumpobj; 480 int error; 481 char whokey[ZFS_MAX_DELEG_NAME]; 482 483 zfs_deleg_whokey(whokey, type, checkflag, valp); 484 485 error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj); 486 if (error != 0) 487 return (error); 488 489 for (zap_cursor_init(&zc, mos, jumpobj); 490 zap_cursor_retrieve(&zc, &za) == 0; 491 zap_cursor_advance(&zc)) { 492 permnode = kmem_alloc(sizeof (perm_set_t), KM_SLEEP); 493 (void) strlcpy(permnode->p_setname, za.za_name, 494 sizeof (permnode->p_setname)); 495 permnode->p_matched = B_FALSE; 496 497 if (avl_find(avl, permnode, &idx) == NULL) { 498 avl_insert(avl, permnode, idx); 499 } else { 500 kmem_free(permnode, sizeof (perm_set_t)); 501 } 502 } 503 zap_cursor_fini(&zc); 504 return (0); 505} 506 507/* 508 * Load all permissions user based on cred belongs to. 509 */ 510static void 511dsl_load_user_sets(objset_t *mos, uint64_t zapobj, avl_tree_t *avl, 512 char checkflag, cred_t *cr) 513{ 514 const gid_t *gids; 515 int ngids, i; 516 uint64_t id; 517 518 id = crgetuid(cr); 519 (void) dsl_load_sets(mos, zapobj, 520 ZFS_DELEG_USER_SETS, checkflag, &id, avl); 521 522 id = crgetgid(cr); 523 (void) dsl_load_sets(mos, zapobj, 524 ZFS_DELEG_GROUP_SETS, checkflag, &id, avl); 525 526 (void) dsl_load_sets(mos, zapobj, 527 ZFS_DELEG_EVERYONE_SETS, checkflag, NULL, avl); 528 529 ngids = crgetngroups(cr); 530 gids = crgetgroups(cr); 531 for (i = 0; i != ngids; i++) { 532 id = gids[i]; 533 (void) dsl_load_sets(mos, zapobj, 534 ZFS_DELEG_GROUP_SETS, checkflag, &id, avl); 535 } 536} 537 538/* 539 * Check if user has requested permission. 540 */ 541int 542dsl_deleg_access_impl(dsl_dataset_t *ds, const char *perm, cred_t *cr) 543{ 544 dsl_dir_t *dd; 545 dsl_pool_t *dp; 546 void *cookie; 547 int error; 548 char checkflag; 549 objset_t *mos; 550 avl_tree_t permsets; 551 perm_set_t *setnode; 552 553 dp = ds->ds_dir->dd_pool; 554 mos = dp->dp_meta_objset; 555 556 if (dsl_delegation_on(mos) == B_FALSE) 557 return (SET_ERROR(ECANCELED)); 558 559 if (spa_version(dmu_objset_spa(dp->dp_meta_objset)) < 560 SPA_VERSION_DELEGATED_PERMS) 561 return (SET_ERROR(EPERM)); 562 563 if (ds->ds_is_snapshot) { 564 /* 565 * Snapshots are treated as descendents only, 566 * local permissions do not apply. 567 */ 568 checkflag = ZFS_DELEG_DESCENDENT; 569 } else { 570 checkflag = ZFS_DELEG_LOCAL; 571 } 572 573 avl_create(&permsets, perm_set_compare, sizeof (perm_set_t), 574 offsetof(perm_set_t, p_node)); 575 576 ASSERT(dsl_pool_config_held(dp)); 577 for (dd = ds->ds_dir; dd != NULL; dd = dd->dd_parent, 578 checkflag = ZFS_DELEG_DESCENDENT) { 579 uint64_t zapobj; 580 boolean_t expanded; 581 582 /* 583 * If not in global zone then make sure 584 * the zoned property is set 585 */ 586 if (!INGLOBALZONE(curthread)) { 587 uint64_t zoned; 588 589 if (dsl_prop_get_dd(dd, 590 zfs_prop_to_name(ZFS_PROP_ZONED), 591 8, 1, &zoned, NULL, B_FALSE) != 0) 592 break; 593 if (!zoned) 594 break; 595 } 596 zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; 597 598 if (zapobj == 0) 599 continue; 600 601 dsl_load_user_sets(mos, zapobj, &permsets, checkflag, cr); 602again: 603 expanded = B_FALSE; 604 for (setnode = avl_first(&permsets); setnode; 605 setnode = AVL_NEXT(&permsets, setnode)) { 606 if (setnode->p_matched == B_TRUE) 607 continue; 608 609 /* See if this set directly grants this permission */ 610 error = dsl_check_access(mos, zapobj, 611 ZFS_DELEG_NAMED_SET, 0, setnode->p_setname, perm); 612 if (error == 0) 613 goto success; 614 if (error == EPERM) 615 setnode->p_matched = B_TRUE; 616 617 /* See if this set includes other sets */ 618 error = dsl_load_sets(mos, zapobj, 619 ZFS_DELEG_NAMED_SET_SETS, 0, 620 setnode->p_setname, &permsets); 621 if (error == 0) 622 setnode->p_matched = expanded = B_TRUE; 623 } 624 /* 625 * If we expanded any sets, that will define more sets, 626 * which we need to check. 627 */ 628 if (expanded) 629 goto again; 630 631 error = dsl_check_user_access(mos, zapobj, perm, checkflag, cr); 632 if (error == 0) 633 goto success; 634 } 635 error = SET_ERROR(EPERM); 636success: 637 638 cookie = NULL; 639 while ((setnode = avl_destroy_nodes(&permsets, &cookie)) != NULL) 640 kmem_free(setnode, sizeof (perm_set_t)); 641 642 return (error); 643} 644 645int 646dsl_deleg_access(const char *dsname, const char *perm, cred_t *cr) 647{ 648 dsl_pool_t *dp; 649 dsl_dataset_t *ds; 650 int error; 651 652 error = dsl_pool_hold(dsname, FTAG, &dp); 653 if (error != 0) 654 return (error); 655 error = dsl_dataset_hold(dp, dsname, FTAG, &ds); 656 if (error == 0) { 657 error = dsl_deleg_access_impl(ds, perm, cr); 658 dsl_dataset_rele(ds, FTAG); 659 } 660 dsl_pool_rele(dp, FTAG); 661 662 return (error); 663} 664 665/* 666 * Other routines. 667 */ 668 669static void 670copy_create_perms(dsl_dir_t *dd, uint64_t pzapobj, 671 boolean_t dosets, uint64_t uid, dmu_tx_t *tx) 672{ 673 objset_t *mos = dd->dd_pool->dp_meta_objset; 674 uint64_t jumpobj, pjumpobj; 675 uint64_t zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; 676 zap_cursor_t zc; 677 zap_attribute_t za; 678 char whokey[ZFS_MAX_DELEG_NAME]; 679 680 zfs_deleg_whokey(whokey, 681 dosets ? ZFS_DELEG_CREATE_SETS : ZFS_DELEG_CREATE, 682 ZFS_DELEG_LOCAL, NULL); 683 if (zap_lookup(mos, pzapobj, whokey, 8, 1, &pjumpobj) != 0) 684 return; 685 686 if (zapobj == 0) { 687 dmu_buf_will_dirty(dd->dd_dbuf, tx); 688 zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj = zap_create(mos, 689 DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx); 690 } 691 692 zfs_deleg_whokey(whokey, 693 dosets ? ZFS_DELEG_USER_SETS : ZFS_DELEG_USER, 694 ZFS_DELEG_LOCAL, &uid); 695 if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) == ENOENT) { 696 jumpobj = zap_create(mos, DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx); 697 VERIFY(zap_add(mos, zapobj, whokey, 8, 1, &jumpobj, tx) == 0); 698 } 699 700 for (zap_cursor_init(&zc, mos, pjumpobj); 701 zap_cursor_retrieve(&zc, &za) == 0; 702 zap_cursor_advance(&zc)) { 703 uint64_t zero = 0; 704 ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1); 705 706 VERIFY(zap_update(mos, jumpobj, za.za_name, 707 8, 1, &zero, tx) == 0); 708 } 709 zap_cursor_fini(&zc); 710} 711 712/* 713 * set all create time permission on new dataset. 714 */ 715void 716dsl_deleg_set_create_perms(dsl_dir_t *sdd, dmu_tx_t *tx, cred_t *cr) 717{ 718 dsl_dir_t *dd; 719 uint64_t uid = crgetuid(cr); 720 721 if (spa_version(dmu_objset_spa(sdd->dd_pool->dp_meta_objset)) < 722 SPA_VERSION_DELEGATED_PERMS) 723 return; 724 725 for (dd = sdd->dd_parent; dd != NULL; dd = dd->dd_parent) { 726 uint64_t pzapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; 727 728 if (pzapobj == 0) 729 continue; 730 731 copy_create_perms(sdd, pzapobj, B_FALSE, uid, tx); 732 copy_create_perms(sdd, pzapobj, B_TRUE, uid, tx); 733 } 734} 735 736int 737dsl_deleg_destroy(objset_t *mos, uint64_t zapobj, dmu_tx_t *tx) 738{ 739 zap_cursor_t zc; 740 zap_attribute_t za; 741 742 if (zapobj == 0) 743 return (0); 744 745 for (zap_cursor_init(&zc, mos, zapobj); 746 zap_cursor_retrieve(&zc, &za) == 0; 747 zap_cursor_advance(&zc)) { 748 ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1); 749 VERIFY(0 == zap_destroy(mos, za.za_first_integer, tx)); 750 } 751 zap_cursor_fini(&zc); 752 VERIFY(0 == zap_destroy(mos, zapobj, tx)); 753 return (0); 754} 755 756boolean_t 757dsl_delegation_on(objset_t *os) 758{ 759 return (!!spa_delegation(os->os_spa)); 760} 761