| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2011, 2015 by Delphix. All rights reserved. |
| */ |
| |
| /* |
| * DSL permissions are stored in a two level zap attribute |
| * mechanism. The first level identifies the "class" of |
| * entry. The class is identified by the first 2 letters of |
| * the attribute. The second letter "l" or "d" identifies whether |
| * it is a local or descendent permission. The first letter |
| * identifies the type of entry. |
| * |
| * ul$<id> identifies permissions granted locally for this userid. |
| * ud$<id> identifies permissions granted on descendent datasets for |
| * this userid. |
| * Ul$<id> identifies permission sets granted locally for this userid. |
| * Ud$<id> identifies permission sets granted on descendent datasets for |
| * this userid. |
| * gl$<id> identifies permissions granted locally for this groupid. |
| * gd$<id> identifies permissions granted on descendent datasets for |
| * this groupid. |
| * Gl$<id> identifies permission sets granted locally for this groupid. |
| * Gd$<id> identifies permission sets granted on descendent datasets for |
| * this groupid. |
| * el$ identifies permissions granted locally for everyone. |
| * ed$ identifies permissions granted on descendent datasets |
| * for everyone. |
| * El$ identifies permission sets granted locally for everyone. |
| * Ed$ identifies permission sets granted to descendent datasets for |
| * everyone. |
| * c-$ identifies permission to create at dataset creation time. |
| * C-$ identifies permission sets to grant locally at dataset creation |
| * time. |
| * s-$@<name> permissions defined in specified set @<name> |
| * S-$@<name> Sets defined in named set @<name> |
| * |
| * Each of the above entities points to another zap attribute that contains one |
| * attribute for each allowed permission, such as create, destroy,... |
| * All of the "upper" case class types will specify permission set names |
| * rather than permissions. |
| * |
| * Basically it looks something like this: |
| * ul$12 -> ZAP OBJ -> permissions... |
| * |
| * The ZAP OBJ is referred to as the jump object. |
| */ |
| |
| #include <sys/dmu.h> |
| #include <sys/dmu_objset.h> |
| #include <sys/dmu_tx.h> |
| #include <sys/dsl_dataset.h> |
| #include <sys/dsl_dir.h> |
| #include <sys/dsl_prop.h> |
| #include <sys/dsl_synctask.h> |
| #include <sys/dsl_deleg.h> |
| #include <sys/spa.h> |
| #include <sys/zap.h> |
| #include <sys/fs/zfs.h> |
| #include <sys/cred.h> |
| #include <sys/sunddi.h> |
| |
| #include "zfs_deleg.h" |
| |
| /* |
| * Validate that user is allowed to delegate specified permissions. |
| * |
| * In order to delegate "create" you must have "create" |
| * and "allow". |
| */ |
| int |
| dsl_deleg_can_allow(char *ddname, nvlist_t *nvp, cred_t *cr) |
| { |
| nvpair_t *whopair = NULL; |
| int error; |
| |
| if ((error = dsl_deleg_access(ddname, ZFS_DELEG_PERM_ALLOW, cr)) != 0) |
| return (error); |
| |
| while ((whopair = nvlist_next_nvpair(nvp, whopair))) { |
| nvlist_t *perms; |
| nvpair_t *permpair = NULL; |
| |
| VERIFY(nvpair_value_nvlist(whopair, &perms) == 0); |
| |
| while ((permpair = nvlist_next_nvpair(perms, permpair))) { |
| const char *perm = nvpair_name(permpair); |
| |
| if (strcmp(perm, ZFS_DELEG_PERM_ALLOW) == 0) |
| return (SET_ERROR(EPERM)); |
| |
| if ((error = dsl_deleg_access(ddname, perm, cr)) != 0) |
| return (error); |
| } |
| } |
| return (0); |
| } |
| |
| /* |
| * Validate that user is allowed to unallow specified permissions. They |
| * must have the 'allow' permission, and even then can only unallow |
| * perms for their uid. |
| */ |
| int |
| dsl_deleg_can_unallow(char *ddname, nvlist_t *nvp, cred_t *cr) |
| { |
| nvpair_t *whopair = NULL; |
| int error; |
| char idstr[32]; |
| |
| if ((error = dsl_deleg_access(ddname, ZFS_DELEG_PERM_ALLOW, cr)) != 0) |
| return (error); |
| |
| (void) snprintf(idstr, sizeof (idstr), "%lld", |
| (longlong_t)crgetuid(cr)); |
| |
| while ((whopair = nvlist_next_nvpair(nvp, whopair))) { |
| zfs_deleg_who_type_t type = nvpair_name(whopair)[0]; |
| |
| if (type != ZFS_DELEG_USER && |
| type != ZFS_DELEG_USER_SETS) |
| return (SET_ERROR(EPERM)); |
| |
| if (strcmp(idstr, &nvpair_name(whopair)[3]) != 0) |
| return (SET_ERROR(EPERM)); |
| } |
| return (0); |
| } |
| |
| typedef struct dsl_deleg_arg { |
| const char *dda_name; |
| nvlist_t *dda_nvlist; |
| } dsl_deleg_arg_t; |
| |
| static void |
| dsl_deleg_set_sync(void *arg, dmu_tx_t *tx) |
| { |
| dsl_deleg_arg_t *dda = arg; |
| dsl_dir_t *dd; |
| dsl_pool_t *dp = dmu_tx_pool(tx); |
| objset_t *mos = dp->dp_meta_objset; |
| nvpair_t *whopair = NULL; |
| uint64_t zapobj; |
| |
| VERIFY0(dsl_dir_hold(dp, dda->dda_name, FTAG, &dd, NULL)); |
| |
| zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; |
| if (zapobj == 0) { |
| dmu_buf_will_dirty(dd->dd_dbuf, tx); |
| zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj = zap_create(mos, |
| DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx); |
| } |
| |
| while ((whopair = nvlist_next_nvpair(dda->dda_nvlist, whopair))) { |
| const char *whokey = nvpair_name(whopair); |
| nvlist_t *perms; |
| nvpair_t *permpair = NULL; |
| uint64_t jumpobj; |
| |
| perms = fnvpair_value_nvlist(whopair); |
| |
| if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0) { |
| jumpobj = zap_create_link(mos, DMU_OT_DSL_PERMS, |
| zapobj, whokey, tx); |
| } |
| |
| while ((permpair = nvlist_next_nvpair(perms, permpair))) { |
| const char *perm = nvpair_name(permpair); |
| uint64_t n = 0; |
| |
| VERIFY(zap_update(mos, jumpobj, |
| perm, 8, 1, &n, tx) == 0); |
| spa_history_log_internal_dd(dd, "permission update", tx, |
| "%s %s", whokey, perm); |
| } |
| } |
| dsl_dir_rele(dd, FTAG); |
| } |
| |
| static void |
| dsl_deleg_unset_sync(void *arg, dmu_tx_t *tx) |
| { |
| dsl_deleg_arg_t *dda = arg; |
| dsl_dir_t *dd; |
| dsl_pool_t *dp = dmu_tx_pool(tx); |
| objset_t *mos = dp->dp_meta_objset; |
| nvpair_t *whopair = NULL; |
| uint64_t zapobj; |
| |
| VERIFY0(dsl_dir_hold(dp, dda->dda_name, FTAG, &dd, NULL)); |
| zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; |
| if (zapobj == 0) { |
| dsl_dir_rele(dd, FTAG); |
| return; |
| } |
| |
| while ((whopair = nvlist_next_nvpair(dda->dda_nvlist, whopair))) { |
| const char *whokey = nvpair_name(whopair); |
| nvlist_t *perms; |
| nvpair_t *permpair = NULL; |
| uint64_t jumpobj; |
| |
| if (nvpair_value_nvlist(whopair, &perms) != 0) { |
| if (zap_lookup(mos, zapobj, whokey, 8, |
| 1, &jumpobj) == 0) { |
| (void) zap_remove(mos, zapobj, whokey, tx); |
| VERIFY(0 == zap_destroy(mos, jumpobj, tx)); |
| } |
| spa_history_log_internal_dd(dd, "permission who remove", |
| tx, "%s", whokey); |
| continue; |
| } |
| |
| if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) != 0) |
| continue; |
| |
| while ((permpair = nvlist_next_nvpair(perms, permpair))) { |
| const char *perm = nvpair_name(permpair); |
| uint64_t n = 0; |
| |
| (void) zap_remove(mos, jumpobj, perm, tx); |
| if (zap_count(mos, jumpobj, &n) == 0 && n == 0) { |
| (void) zap_remove(mos, zapobj, |
| whokey, tx); |
| VERIFY(0 == zap_destroy(mos, |
| jumpobj, tx)); |
| } |
| spa_history_log_internal_dd(dd, "permission remove", tx, |
| "%s %s", whokey, perm); |
| } |
| } |
| dsl_dir_rele(dd, FTAG); |
| } |
| |
| static int |
| dsl_deleg_check(void *arg, dmu_tx_t *tx) |
| { |
| dsl_deleg_arg_t *dda = arg; |
| dsl_dir_t *dd; |
| int error; |
| |
| if (spa_version(dmu_tx_pool(tx)->dp_spa) < |
| SPA_VERSION_DELEGATED_PERMS) { |
| return (SET_ERROR(ENOTSUP)); |
| } |
| |
| error = dsl_dir_hold(dmu_tx_pool(tx), dda->dda_name, FTAG, &dd, NULL); |
| if (error == 0) |
| dsl_dir_rele(dd, FTAG); |
| return (error); |
| } |
| |
| int |
| dsl_deleg_set(const char *ddname, nvlist_t *nvp, boolean_t unset) |
| { |
| dsl_deleg_arg_t dda; |
| |
| /* nvp must already have been verified to be valid */ |
| |
| dda.dda_name = ddname; |
| dda.dda_nvlist = nvp; |
| |
| return (dsl_sync_task(ddname, dsl_deleg_check, |
| unset ? dsl_deleg_unset_sync : dsl_deleg_set_sync, |
| &dda, fnvlist_num_pairs(nvp), ZFS_SPACE_CHECK_RESERVED)); |
| } |
| |
| /* |
| * Find all 'allow' permissions from a given point and then continue |
| * traversing up to the root. |
| * |
| * This function constructs an nvlist of nvlists. |
| * each setpoint is an nvlist composed of an nvlist of an nvlist |
| * of the individual * users/groups/everyone/create |
| * permissions. |
| * |
| * The nvlist will look like this. |
| * |
| * { source fsname -> { whokeys { permissions,...}, ...}} |
| * |
| * The fsname nvpairs will be arranged in a bottom up order. For example, |
| * if we have the following structure a/b/c then the nvpairs for the fsnames |
| * will be ordered a/b/c, a/b, a. |
| */ |
| int |
| dsl_deleg_get(const char *ddname, nvlist_t **nvp) |
| { |
| dsl_dir_t *dd, *startdd; |
| dsl_pool_t *dp; |
| int error; |
| objset_t *mos; |
| zap_cursor_t *basezc, *zc; |
| zap_attribute_t *baseza, *za; |
| char *source; |
| |
| error = dsl_pool_hold(ddname, FTAG, &dp); |
| if (error != 0) |
| return (error); |
| |
| error = dsl_dir_hold(dp, ddname, FTAG, &startdd, NULL); |
| if (error != 0) { |
| dsl_pool_rele(dp, FTAG); |
| return (error); |
| } |
| |
| dp = startdd->dd_pool; |
| mos = dp->dp_meta_objset; |
| |
| zc = kmem_alloc(sizeof (zap_cursor_t), KM_SLEEP); |
| za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); |
| basezc = kmem_alloc(sizeof (zap_cursor_t), KM_SLEEP); |
| baseza = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); |
| source = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); |
| VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); |
| |
| for (dd = startdd; dd != NULL; dd = dd->dd_parent) { |
| nvlist_t *sp_nvp; |
| uint64_t n; |
| |
| if (dsl_dir_phys(dd)->dd_deleg_zapobj == 0 || |
| zap_count(mos, |
| dsl_dir_phys(dd)->dd_deleg_zapobj, &n) != 0 || n == 0) |
| continue; |
| |
| sp_nvp = fnvlist_alloc(); |
| for (zap_cursor_init(basezc, mos, |
| dsl_dir_phys(dd)->dd_deleg_zapobj); |
| zap_cursor_retrieve(basezc, baseza) == 0; |
| zap_cursor_advance(basezc)) { |
| nvlist_t *perms_nvp; |
| |
| ASSERT(baseza->za_integer_length == 8); |
| ASSERT(baseza->za_num_integers == 1); |
| |
| perms_nvp = fnvlist_alloc(); |
| for (zap_cursor_init(zc, mos, baseza->za_first_integer); |
| zap_cursor_retrieve(zc, za) == 0; |
| zap_cursor_advance(zc)) { |
| fnvlist_add_boolean(perms_nvp, za->za_name); |
| } |
| zap_cursor_fini(zc); |
| fnvlist_add_nvlist(sp_nvp, baseza->za_name, perms_nvp); |
| fnvlist_free(perms_nvp); |
| } |
| |
| zap_cursor_fini(basezc); |
| |
| dsl_dir_name(dd, source); |
| fnvlist_add_nvlist(*nvp, source, sp_nvp); |
| nvlist_free(sp_nvp); |
| } |
| |
| kmem_free(source, ZFS_MAX_DATASET_NAME_LEN); |
| kmem_free(baseza, sizeof (zap_attribute_t)); |
| kmem_free(basezc, sizeof (zap_cursor_t)); |
| kmem_free(za, sizeof (zap_attribute_t)); |
| kmem_free(zc, sizeof (zap_cursor_t)); |
| |
| dsl_dir_rele(startdd, FTAG); |
| dsl_pool_rele(dp, FTAG); |
| return (0); |
| } |
| |
| /* |
| * Routines for dsl_deleg_access() -- access checking. |
| */ |
| typedef struct perm_set { |
| avl_node_t p_node; |
| boolean_t p_matched; |
| char p_setname[ZFS_MAX_DELEG_NAME]; |
| } perm_set_t; |
| |
| static int |
| perm_set_compare(const void *arg1, const void *arg2) |
| { |
| const perm_set_t *node1 = (const perm_set_t *)arg1; |
| const perm_set_t *node2 = (const perm_set_t *)arg2; |
| int val; |
| |
| val = strcmp(node1->p_setname, node2->p_setname); |
| |
| return (AVL_ISIGN(val)); |
| } |
| |
| /* |
| * Determine whether a specified permission exists. |
| * |
| * First the base attribute has to be retrieved. i.e. ul$12 |
| * Once the base object has been retrieved the actual permission |
| * is lookup up in the zap object the base object points to. |
| * |
| * Return 0 if permission exists, ENOENT if there is no whokey, EPERM if |
| * there is no perm in that jumpobj. |
| */ |
| static int |
| dsl_check_access(objset_t *mos, uint64_t zapobj, |
| char type, char checkflag, void *valp, const char *perm) |
| { |
| int error; |
| uint64_t jumpobj, zero; |
| char whokey[ZFS_MAX_DELEG_NAME]; |
| |
| zfs_deleg_whokey(whokey, type, checkflag, valp); |
| error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj); |
| if (error == 0) { |
| error = zap_lookup(mos, jumpobj, perm, 8, 1, &zero); |
| if (error == ENOENT) |
| error = SET_ERROR(EPERM); |
| } |
| return (error); |
| } |
| |
| /* |
| * check a specified user/group for a requested permission |
| */ |
| static int |
| dsl_check_user_access(objset_t *mos, uint64_t zapobj, const char *perm, |
| int checkflag, cred_t *cr) |
| { |
| const gid_t *gids; |
| int ngids; |
| int i; |
| uint64_t id; |
| |
| /* check for user */ |
| id = crgetuid(cr); |
| if (dsl_check_access(mos, zapobj, |
| ZFS_DELEG_USER, checkflag, &id, perm) == 0) |
| return (0); |
| |
| /* check for users primary group */ |
| id = crgetgid(cr); |
| if (dsl_check_access(mos, zapobj, |
| ZFS_DELEG_GROUP, checkflag, &id, perm) == 0) |
| return (0); |
| |
| /* check for everyone entry */ |
| id = -1; |
| if (dsl_check_access(mos, zapobj, |
| ZFS_DELEG_EVERYONE, checkflag, &id, perm) == 0) |
| return (0); |
| |
| /* check each supplemental group user is a member of */ |
| ngids = crgetngroups(cr); |
| gids = crgetgroups(cr); |
| for (i = 0; i != ngids; i++) { |
| id = gids[i]; |
| if (dsl_check_access(mos, zapobj, |
| ZFS_DELEG_GROUP, checkflag, &id, perm) == 0) |
| return (0); |
| } |
| |
| return (SET_ERROR(EPERM)); |
| } |
| |
| /* |
| * Iterate over the sets specified in the specified zapobj |
| * and load them into the permsets avl tree. |
| */ |
| static int |
| dsl_load_sets(objset_t *mos, uint64_t zapobj, |
| char type, char checkflag, void *valp, avl_tree_t *avl) |
| { |
| zap_cursor_t zc; |
| zap_attribute_t za; |
| perm_set_t *permnode; |
| avl_index_t idx; |
| uint64_t jumpobj; |
| int error; |
| char whokey[ZFS_MAX_DELEG_NAME]; |
| |
| zfs_deleg_whokey(whokey, type, checkflag, valp); |
| |
| error = zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj); |
| if (error != 0) |
| return (error); |
| |
| for (zap_cursor_init(&zc, mos, jumpobj); |
| zap_cursor_retrieve(&zc, &za) == 0; |
| zap_cursor_advance(&zc)) { |
| permnode = kmem_alloc(sizeof (perm_set_t), KM_SLEEP); |
| (void) strlcpy(permnode->p_setname, za.za_name, |
| sizeof (permnode->p_setname)); |
| permnode->p_matched = B_FALSE; |
| |
| if (avl_find(avl, permnode, &idx) == NULL) { |
| avl_insert(avl, permnode, idx); |
| } else { |
| kmem_free(permnode, sizeof (perm_set_t)); |
| } |
| } |
| zap_cursor_fini(&zc); |
| return (0); |
| } |
| |
| /* |
| * Load all permissions user based on cred belongs to. |
| */ |
| static void |
| dsl_load_user_sets(objset_t *mos, uint64_t zapobj, avl_tree_t *avl, |
| char checkflag, cred_t *cr) |
| { |
| const gid_t *gids; |
| int ngids, i; |
| uint64_t id; |
| |
| id = crgetuid(cr); |
| (void) dsl_load_sets(mos, zapobj, |
| ZFS_DELEG_USER_SETS, checkflag, &id, avl); |
| |
| id = crgetgid(cr); |
| (void) dsl_load_sets(mos, zapobj, |
| ZFS_DELEG_GROUP_SETS, checkflag, &id, avl); |
| |
| (void) dsl_load_sets(mos, zapobj, |
| ZFS_DELEG_EVERYONE_SETS, checkflag, NULL, avl); |
| |
| ngids = crgetngroups(cr); |
| gids = crgetgroups(cr); |
| for (i = 0; i != ngids; i++) { |
| id = gids[i]; |
| (void) dsl_load_sets(mos, zapobj, |
| ZFS_DELEG_GROUP_SETS, checkflag, &id, avl); |
| } |
| } |
| |
| /* |
| * Check if user has requested permission. |
| */ |
| int |
| dsl_deleg_access_impl(dsl_dataset_t *ds, const char *perm, cred_t *cr) |
| { |
| dsl_dir_t *dd; |
| dsl_pool_t *dp; |
| void *cookie; |
| int error; |
| char checkflag; |
| objset_t *mos; |
| avl_tree_t permsets; |
| perm_set_t *setnode; |
| |
| dp = ds->ds_dir->dd_pool; |
| mos = dp->dp_meta_objset; |
| |
| if (dsl_delegation_on(mos) == B_FALSE) |
| return (SET_ERROR(ECANCELED)); |
| |
| if (spa_version(dmu_objset_spa(dp->dp_meta_objset)) < |
| SPA_VERSION_DELEGATED_PERMS) |
| return (SET_ERROR(EPERM)); |
| |
| if (ds->ds_is_snapshot) { |
| /* |
| * Snapshots are treated as descendents only, |
| * local permissions do not apply. |
| */ |
| checkflag = ZFS_DELEG_DESCENDENT; |
| } else { |
| checkflag = ZFS_DELEG_LOCAL; |
| } |
| |
| avl_create(&permsets, perm_set_compare, sizeof (perm_set_t), |
| offsetof(perm_set_t, p_node)); |
| |
| ASSERT(dsl_pool_config_held(dp)); |
| for (dd = ds->ds_dir; dd != NULL; dd = dd->dd_parent, |
| checkflag = ZFS_DELEG_DESCENDENT) { |
| uint64_t zapobj; |
| boolean_t expanded; |
| |
| /* |
| * If not in global zone then make sure |
| * the zoned property is set |
| */ |
| if (!INGLOBALZONE(curproc)) { |
| uint64_t zoned; |
| |
| if (dsl_prop_get_dd(dd, |
| zfs_prop_to_name(ZFS_PROP_ZONED), |
| 8, 1, &zoned, NULL, B_FALSE) != 0) |
| break; |
| if (!zoned) |
| break; |
| } |
| zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; |
| |
| if (zapobj == 0) |
| continue; |
| |
| dsl_load_user_sets(mos, zapobj, &permsets, checkflag, cr); |
| again: |
| expanded = B_FALSE; |
| for (setnode = avl_first(&permsets); setnode; |
| setnode = AVL_NEXT(&permsets, setnode)) { |
| if (setnode->p_matched == B_TRUE) |
| continue; |
| |
| /* See if this set directly grants this permission */ |
| error = dsl_check_access(mos, zapobj, |
| ZFS_DELEG_NAMED_SET, 0, setnode->p_setname, perm); |
| if (error == 0) |
| goto success; |
| if (error == EPERM) |
| setnode->p_matched = B_TRUE; |
| |
| /* See if this set includes other sets */ |
| error = dsl_load_sets(mos, zapobj, |
| ZFS_DELEG_NAMED_SET_SETS, 0, |
| setnode->p_setname, &permsets); |
| if (error == 0) |
| setnode->p_matched = expanded = B_TRUE; |
| } |
| /* |
| * If we expanded any sets, that will define more sets, |
| * which we need to check. |
| */ |
| if (expanded) |
| goto again; |
| |
| error = dsl_check_user_access(mos, zapobj, perm, checkflag, cr); |
| if (error == 0) |
| goto success; |
| } |
| error = SET_ERROR(EPERM); |
| success: |
| |
| cookie = NULL; |
| while ((setnode = avl_destroy_nodes(&permsets, &cookie)) != NULL) |
| kmem_free(setnode, sizeof (perm_set_t)); |
| |
| return (error); |
| } |
| |
| int |
| dsl_deleg_access(const char *dsname, const char *perm, cred_t *cr) |
| { |
| dsl_pool_t *dp; |
| dsl_dataset_t *ds; |
| int error; |
| |
| error = dsl_pool_hold(dsname, FTAG, &dp); |
| if (error != 0) |
| return (error); |
| error = dsl_dataset_hold(dp, dsname, FTAG, &ds); |
| if (error == 0) { |
| error = dsl_deleg_access_impl(ds, perm, cr); |
| dsl_dataset_rele(ds, FTAG); |
| } |
| dsl_pool_rele(dp, FTAG); |
| |
| return (error); |
| } |
| |
| /* |
| * Other routines. |
| */ |
| |
| static void |
| copy_create_perms(dsl_dir_t *dd, uint64_t pzapobj, |
| boolean_t dosets, uint64_t uid, dmu_tx_t *tx) |
| { |
| objset_t *mos = dd->dd_pool->dp_meta_objset; |
| uint64_t jumpobj, pjumpobj; |
| uint64_t zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; |
| zap_cursor_t zc; |
| zap_attribute_t za; |
| char whokey[ZFS_MAX_DELEG_NAME]; |
| |
| zfs_deleg_whokey(whokey, |
| dosets ? ZFS_DELEG_CREATE_SETS : ZFS_DELEG_CREATE, |
| ZFS_DELEG_LOCAL, NULL); |
| if (zap_lookup(mos, pzapobj, whokey, 8, 1, &pjumpobj) != 0) |
| return; |
| |
| if (zapobj == 0) { |
| dmu_buf_will_dirty(dd->dd_dbuf, tx); |
| zapobj = dsl_dir_phys(dd)->dd_deleg_zapobj = zap_create(mos, |
| DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx); |
| } |
| |
| zfs_deleg_whokey(whokey, |
| dosets ? ZFS_DELEG_USER_SETS : ZFS_DELEG_USER, |
| ZFS_DELEG_LOCAL, &uid); |
| if (zap_lookup(mos, zapobj, whokey, 8, 1, &jumpobj) == ENOENT) { |
| jumpobj = zap_create(mos, DMU_OT_DSL_PERMS, DMU_OT_NONE, 0, tx); |
| VERIFY(zap_add(mos, zapobj, whokey, 8, 1, &jumpobj, tx) == 0); |
| } |
| |
| for (zap_cursor_init(&zc, mos, pjumpobj); |
| zap_cursor_retrieve(&zc, &za) == 0; |
| zap_cursor_advance(&zc)) { |
| uint64_t zero = 0; |
| ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1); |
| |
| VERIFY(zap_update(mos, jumpobj, za.za_name, |
| 8, 1, &zero, tx) == 0); |
| } |
| zap_cursor_fini(&zc); |
| } |
| |
| /* |
| * set all create time permission on new dataset. |
| */ |
| void |
| dsl_deleg_set_create_perms(dsl_dir_t *sdd, dmu_tx_t *tx, cred_t *cr) |
| { |
| dsl_dir_t *dd; |
| uint64_t uid = crgetuid(cr); |
| |
| if (spa_version(dmu_objset_spa(sdd->dd_pool->dp_meta_objset)) < |
| SPA_VERSION_DELEGATED_PERMS) |
| return; |
| |
| for (dd = sdd->dd_parent; dd != NULL; dd = dd->dd_parent) { |
| uint64_t pzapobj = dsl_dir_phys(dd)->dd_deleg_zapobj; |
| |
| if (pzapobj == 0) |
| continue; |
| |
| copy_create_perms(sdd, pzapobj, B_FALSE, uid, tx); |
| copy_create_perms(sdd, pzapobj, B_TRUE, uid, tx); |
| } |
| } |
| |
| int |
| dsl_deleg_destroy(objset_t *mos, uint64_t zapobj, dmu_tx_t *tx) |
| { |
| zap_cursor_t zc; |
| zap_attribute_t za; |
| |
| if (zapobj == 0) |
| return (0); |
| |
| for (zap_cursor_init(&zc, mos, zapobj); |
| zap_cursor_retrieve(&zc, &za) == 0; |
| zap_cursor_advance(&zc)) { |
| ASSERT(za.za_integer_length == 8 && za.za_num_integers == 1); |
| VERIFY(0 == zap_destroy(mos, za.za_first_integer, tx)); |
| } |
| zap_cursor_fini(&zc); |
| VERIFY(0 == zap_destroy(mos, zapobj, tx)); |
| return (0); |
| } |
| |
| boolean_t |
| dsl_delegation_on(objset_t *os) |
| { |
| return (!!spa_delegation(os->os_spa)); |
| } |
| |
| #if defined(_KERNEL) |
| EXPORT_SYMBOL(dsl_deleg_get); |
| EXPORT_SYMBOL(dsl_deleg_set); |
| #endif |