| /* |
| * 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 2010 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Portions Copyright 2007 Ramprakash Jelari |
| * Copyright (c) 2014, 2015 by Delphix. All rights reserved. |
| * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> |
| * Copyright (c) 2018 Datto Inc. |
| */ |
| |
| #include <libintl.h> |
| #include <libuutil.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <zone.h> |
| |
| #include <libzfs.h> |
| |
| #include "libzfs_impl.h" |
| |
| /* |
| * Structure to keep track of dataset state. Before changing the 'sharenfs' or |
| * 'mountpoint' property, we record whether the filesystem was previously |
| * mounted/shared. This prior state dictates whether we remount/reshare the |
| * dataset after the property has been changed. |
| * |
| * The interface consists of the following sequence of functions: |
| * |
| * changelist_gather() |
| * changelist_prefix() |
| * < change property > |
| * changelist_postfix() |
| * changelist_free() |
| * |
| * Other interfaces: |
| * |
| * changelist_remove() - remove a node from a gathered list |
| * changelist_rename() - renames all datasets appropriately when doing a rename |
| * changelist_unshare() - unshares all the nodes in a given changelist |
| * changelist_haszonedchild() - check if there is any child exported to |
| * a local zone |
| */ |
| typedef struct prop_changenode { |
| zfs_handle_t *cn_handle; |
| int cn_shared; |
| int cn_mounted; |
| int cn_zoned; |
| boolean_t cn_needpost; /* is postfix() needed? */ |
| uu_avl_node_t cn_treenode; |
| } prop_changenode_t; |
| |
| struct prop_changelist { |
| zfs_prop_t cl_prop; |
| zfs_prop_t cl_realprop; |
| zfs_prop_t cl_shareprop; /* used with sharenfs/sharesmb */ |
| uu_avl_pool_t *cl_pool; |
| uu_avl_t *cl_tree; |
| boolean_t cl_waslegacy; |
| boolean_t cl_allchildren; |
| boolean_t cl_alldependents; |
| int cl_mflags; /* Mount flags */ |
| int cl_gflags; /* Gather request flags */ |
| boolean_t cl_haszonedchild; |
| }; |
| |
| /* |
| * If the property is 'mountpoint', go through and unmount filesystems as |
| * necessary. We don't do the same for 'sharenfs', because we can just re-share |
| * with different options without interrupting service. We do handle 'sharesmb' |
| * since there may be old resource names that need to be removed. |
| */ |
| int |
| changelist_prefix(prop_changelist_t *clp) |
| { |
| prop_changenode_t *cn; |
| uu_avl_walk_t *walk; |
| int ret = 0; |
| |
| if (clp->cl_prop != ZFS_PROP_MOUNTPOINT && |
| clp->cl_prop != ZFS_PROP_SHARESMB) |
| return (0); |
| |
| if ((walk = uu_avl_walk_start(clp->cl_tree, UU_WALK_ROBUST)) == NULL) |
| return (-1); |
| |
| while ((cn = uu_avl_walk_next(walk)) != NULL) { |
| |
| /* if a previous loop failed, set the remaining to false */ |
| if (ret == -1) { |
| cn->cn_needpost = B_FALSE; |
| continue; |
| } |
| |
| /* |
| * If we are in the global zone, but this dataset is exported |
| * to a local zone, do nothing. |
| */ |
| if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned) |
| continue; |
| |
| if (!ZFS_IS_VOLUME(cn->cn_handle)) { |
| /* |
| * Do the property specific processing. |
| */ |
| switch (clp->cl_prop) { |
| case ZFS_PROP_MOUNTPOINT: |
| if (zfs_unmount(cn->cn_handle, NULL, |
| clp->cl_mflags) != 0) { |
| ret = -1; |
| cn->cn_needpost = B_FALSE; |
| } |
| break; |
| case ZFS_PROP_SHARESMB: |
| (void) zfs_unshare_smb(cn->cn_handle, NULL); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| } |
| |
| uu_avl_walk_end(walk); |
| |
| if (ret == -1) |
| (void) changelist_postfix(clp); |
| |
| return (ret); |
| } |
| |
| /* |
| * If the property is 'mountpoint' or 'sharenfs', go through and remount and/or |
| * reshare the filesystems as necessary. In changelist_gather() we recorded |
| * whether the filesystem was previously shared or mounted. The action we take |
| * depends on the previous state, and whether the value was previously 'legacy'. |
| * For non-legacy properties, we only remount/reshare the filesystem if it was |
| * previously mounted/shared. Otherwise, we always remount/reshare the |
| * filesystem. |
| */ |
| int |
| changelist_postfix(prop_changelist_t *clp) |
| { |
| prop_changenode_t *cn; |
| uu_avl_walk_t *walk; |
| char shareopts[ZFS_MAXPROPLEN]; |
| int errors = 0; |
| libzfs_handle_t *hdl; |
| |
| /* |
| * If we're changing the mountpoint, attempt to destroy the underlying |
| * mountpoint. All other datasets will have inherited from this dataset |
| * (in which case their mountpoints exist in the filesystem in the new |
| * location), or have explicit mountpoints set (in which case they won't |
| * be in the changelist). |
| */ |
| if ((cn = uu_avl_last(clp->cl_tree)) == NULL) |
| return (0); |
| |
| if (clp->cl_prop == ZFS_PROP_MOUNTPOINT) |
| remove_mountpoint(cn->cn_handle); |
| |
| /* |
| * It is possible that the changelist_prefix() used libshare |
| * to unshare some entries. Since libshare caches data, an |
| * attempt to reshare during postfix can fail unless libshare |
| * is uninitialized here so that it will reinitialize later. |
| */ |
| if (cn->cn_handle != NULL) { |
| hdl = cn->cn_handle->zfs_hdl; |
| assert(hdl != NULL); |
| zfs_uninit_libshare(hdl); |
| } |
| |
| /* |
| * We walk the datasets in reverse, because we want to mount any parent |
| * datasets before mounting the children. We walk all datasets even if |
| * there are errors. |
| */ |
| if ((walk = uu_avl_walk_start(clp->cl_tree, |
| UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) |
| return (-1); |
| |
| while ((cn = uu_avl_walk_next(walk)) != NULL) { |
| |
| boolean_t sharenfs; |
| boolean_t sharesmb; |
| boolean_t mounted; |
| boolean_t needs_key; |
| |
| /* |
| * If we are in the global zone, but this dataset is exported |
| * to a local zone, do nothing. |
| */ |
| if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned) |
| continue; |
| |
| /* Only do post-processing if it's required */ |
| if (!cn->cn_needpost) |
| continue; |
| cn->cn_needpost = B_FALSE; |
| |
| zfs_refresh_properties(cn->cn_handle); |
| |
| if (ZFS_IS_VOLUME(cn->cn_handle)) |
| continue; |
| |
| /* |
| * Remount if previously mounted or mountpoint was legacy, |
| * or sharenfs or sharesmb property is set. |
| */ |
| sharenfs = ((zfs_prop_get(cn->cn_handle, ZFS_PROP_SHARENFS, |
| shareopts, sizeof (shareopts), NULL, NULL, 0, |
| B_FALSE) == 0) && (strcmp(shareopts, "off") != 0)); |
| |
| sharesmb = ((zfs_prop_get(cn->cn_handle, ZFS_PROP_SHARESMB, |
| shareopts, sizeof (shareopts), NULL, NULL, 0, |
| B_FALSE) == 0) && (strcmp(shareopts, "off") != 0)); |
| |
| needs_key = (zfs_prop_get_int(cn->cn_handle, |
| ZFS_PROP_KEYSTATUS) == ZFS_KEYSTATUS_UNAVAILABLE); |
| |
| mounted = zfs_is_mounted(cn->cn_handle, NULL); |
| |
| if (!mounted && !needs_key && (cn->cn_mounted || |
| ((sharenfs || sharesmb || clp->cl_waslegacy) && |
| (zfs_prop_get_int(cn->cn_handle, |
| ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_ON)))) { |
| |
| if (zfs_mount(cn->cn_handle, NULL, 0) != 0) |
| errors++; |
| else |
| mounted = TRUE; |
| } |
| |
| /* |
| * If the file system is mounted we always re-share even |
| * if the filesystem is currently shared, so that we can |
| * adopt any new options. |
| */ |
| if (sharenfs && mounted) |
| errors += zfs_share_nfs(cn->cn_handle); |
| else if (cn->cn_shared || clp->cl_waslegacy) |
| errors += zfs_unshare_nfs(cn->cn_handle, NULL); |
| if (sharesmb && mounted) |
| errors += zfs_share_smb(cn->cn_handle); |
| else if (cn->cn_shared || clp->cl_waslegacy) |
| errors += zfs_unshare_smb(cn->cn_handle, NULL); |
| } |
| |
| uu_avl_walk_end(walk); |
| |
| return (errors ? -1 : 0); |
| } |
| |
| /* |
| * Is this "dataset" a child of "parent"? |
| */ |
| boolean_t |
| isa_child_of(const char *dataset, const char *parent) |
| { |
| int len; |
| |
| len = strlen(parent); |
| |
| if (strncmp(dataset, parent, len) == 0 && |
| (dataset[len] == '@' || dataset[len] == '/' || |
| dataset[len] == '\0')) |
| return (B_TRUE); |
| else |
| return (B_FALSE); |
| |
| } |
| |
| /* |
| * If we rename a filesystem, child filesystem handles are no longer valid |
| * since we identify each dataset by its name in the ZFS namespace. As a |
| * result, we have to go through and fix up all the names appropriately. We |
| * could do this automatically if libzfs kept track of all open handles, but |
| * this is a lot less work. |
| */ |
| void |
| changelist_rename(prop_changelist_t *clp, const char *src, const char *dst) |
| { |
| prop_changenode_t *cn; |
| uu_avl_walk_t *walk; |
| char newname[ZFS_MAX_DATASET_NAME_LEN]; |
| |
| if ((walk = uu_avl_walk_start(clp->cl_tree, UU_WALK_ROBUST)) == NULL) |
| return; |
| |
| while ((cn = uu_avl_walk_next(walk)) != NULL) { |
| /* |
| * Do not rename a clone that's not in the source hierarchy. |
| */ |
| if (!isa_child_of(cn->cn_handle->zfs_name, src)) |
| continue; |
| |
| /* |
| * Destroy the previous mountpoint if needed. |
| */ |
| remove_mountpoint(cn->cn_handle); |
| |
| (void) strlcpy(newname, dst, sizeof (newname)); |
| (void) strlcat(newname, cn->cn_handle->zfs_name + strlen(src), |
| sizeof (newname)); |
| |
| (void) strlcpy(cn->cn_handle->zfs_name, newname, |
| sizeof (cn->cn_handle->zfs_name)); |
| } |
| |
| uu_avl_walk_end(walk); |
| } |
| |
| /* |
| * Given a gathered changelist for the 'sharenfs' or 'sharesmb' property, |
| * unshare all the datasets in the list. |
| */ |
| int |
| changelist_unshare(prop_changelist_t *clp, zfs_share_proto_t *proto) |
| { |
| prop_changenode_t *cn; |
| uu_avl_walk_t *walk; |
| int ret = 0; |
| |
| if (clp->cl_prop != ZFS_PROP_SHARENFS && |
| clp->cl_prop != ZFS_PROP_SHARESMB) |
| return (0); |
| |
| if ((walk = uu_avl_walk_start(clp->cl_tree, UU_WALK_ROBUST)) == NULL) |
| return (-1); |
| |
| while ((cn = uu_avl_walk_next(walk)) != NULL) { |
| if (zfs_unshare_proto(cn->cn_handle, NULL, proto) != 0) |
| ret = -1; |
| } |
| |
| uu_avl_walk_end(walk); |
| |
| return (ret); |
| } |
| |
| /* |
| * Check if there is any child exported to a local zone in a given changelist. |
| * This information has already been recorded while gathering the changelist |
| * via changelist_gather(). |
| */ |
| int |
| changelist_haszonedchild(prop_changelist_t *clp) |
| { |
| return (clp->cl_haszonedchild); |
| } |
| |
| /* |
| * Remove a node from a gathered list. |
| */ |
| void |
| changelist_remove(prop_changelist_t *clp, const char *name) |
| { |
| prop_changenode_t *cn; |
| uu_avl_walk_t *walk; |
| |
| if ((walk = uu_avl_walk_start(clp->cl_tree, UU_WALK_ROBUST)) == NULL) |
| return; |
| |
| while ((cn = uu_avl_walk_next(walk)) != NULL) { |
| if (strcmp(cn->cn_handle->zfs_name, name) == 0) { |
| uu_avl_remove(clp->cl_tree, cn); |
| zfs_close(cn->cn_handle); |
| free(cn); |
| uu_avl_walk_end(walk); |
| return; |
| } |
| } |
| |
| uu_avl_walk_end(walk); |
| } |
| |
| /* |
| * Release any memory associated with a changelist. |
| */ |
| void |
| changelist_free(prop_changelist_t *clp) |
| { |
| prop_changenode_t *cn; |
| |
| if (clp->cl_tree) { |
| uu_avl_walk_t *walk; |
| |
| if ((walk = uu_avl_walk_start(clp->cl_tree, |
| UU_WALK_ROBUST)) == NULL) |
| return; |
| |
| while ((cn = uu_avl_walk_next(walk)) != NULL) { |
| uu_avl_remove(clp->cl_tree, cn); |
| zfs_close(cn->cn_handle); |
| free(cn); |
| } |
| |
| uu_avl_walk_end(walk); |
| uu_avl_destroy(clp->cl_tree); |
| } |
| if (clp->cl_pool) |
| uu_avl_pool_destroy(clp->cl_pool); |
| |
| free(clp); |
| } |
| |
| /* |
| * Add one dataset to changelist |
| */ |
| static int |
| changelist_add_mounted(zfs_handle_t *zhp, void *data) |
| { |
| prop_changelist_t *clp = data; |
| prop_changenode_t *cn; |
| uu_avl_index_t idx; |
| |
| ASSERT3U(clp->cl_prop, ==, ZFS_PROP_MOUNTPOINT); |
| |
| if ((cn = zfs_alloc(zfs_get_handle(zhp), |
| sizeof (prop_changenode_t))) == NULL) { |
| zfs_close(zhp); |
| return (ENOMEM); |
| } |
| |
| cn->cn_handle = zhp; |
| cn->cn_mounted = zfs_is_mounted(zhp, NULL); |
| ASSERT3U(cn->cn_mounted, ==, B_TRUE); |
| cn->cn_shared = zfs_is_shared(zhp); |
| cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); |
| cn->cn_needpost = B_TRUE; |
| |
| /* Indicate if any child is exported to a local zone. */ |
| if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned) |
| clp->cl_haszonedchild = B_TRUE; |
| |
| uu_avl_node_init(cn, &cn->cn_treenode, clp->cl_pool); |
| |
| if (uu_avl_find(clp->cl_tree, cn, NULL, &idx) == NULL) { |
| uu_avl_insert(clp->cl_tree, cn, idx); |
| } else { |
| free(cn); |
| zfs_close(zhp); |
| } |
| |
| return (0); |
| } |
| |
| static int |
| change_one(zfs_handle_t *zhp, void *data) |
| { |
| prop_changelist_t *clp = data; |
| char property[ZFS_MAXPROPLEN]; |
| char where[64]; |
| prop_changenode_t *cn = NULL; |
| zprop_source_t sourcetype = ZPROP_SRC_NONE; |
| zprop_source_t share_sourcetype = ZPROP_SRC_NONE; |
| int ret = 0; |
| |
| /* |
| * We only want to unmount/unshare those filesystems that may inherit |
| * from the target filesystem. If we find any filesystem with a |
| * locally set mountpoint, we ignore any children since changing the |
| * property will not affect them. If this is a rename, we iterate |
| * over all children regardless, since we need them unmounted in |
| * order to do the rename. Also, if this is a volume and we're doing |
| * a rename, then always add it to the changelist. |
| */ |
| |
| if (!(ZFS_IS_VOLUME(zhp) && clp->cl_realprop == ZFS_PROP_NAME) && |
| zfs_prop_get(zhp, clp->cl_prop, property, |
| sizeof (property), &sourcetype, where, sizeof (where), |
| B_FALSE) != 0) { |
| goto out; |
| } |
| |
| /* |
| * If we are "watching" sharenfs or sharesmb |
| * then check out the companion property which is tracked |
| * in cl_shareprop |
| */ |
| if (clp->cl_shareprop != ZPROP_INVAL && |
| zfs_prop_get(zhp, clp->cl_shareprop, property, |
| sizeof (property), &share_sourcetype, where, sizeof (where), |
| B_FALSE) != 0) { |
| goto out; |
| } |
| |
| if (clp->cl_alldependents || clp->cl_allchildren || |
| sourcetype == ZPROP_SRC_DEFAULT || |
| sourcetype == ZPROP_SRC_INHERITED || |
| (clp->cl_shareprop != ZPROP_INVAL && |
| (share_sourcetype == ZPROP_SRC_DEFAULT || |
| share_sourcetype == ZPROP_SRC_INHERITED))) { |
| if ((cn = zfs_alloc(zfs_get_handle(zhp), |
| sizeof (prop_changenode_t))) == NULL) { |
| ret = -1; |
| goto out; |
| } |
| |
| cn->cn_handle = zhp; |
| cn->cn_mounted = (clp->cl_gflags & CL_GATHER_MOUNT_ALWAYS) || |
| zfs_is_mounted(zhp, NULL); |
| cn->cn_shared = zfs_is_shared(zhp); |
| cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); |
| cn->cn_needpost = B_TRUE; |
| |
| /* Indicate if any child is exported to a local zone. */ |
| if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned) |
| clp->cl_haszonedchild = B_TRUE; |
| |
| uu_avl_node_init(cn, &cn->cn_treenode, clp->cl_pool); |
| |
| uu_avl_index_t idx; |
| |
| if (uu_avl_find(clp->cl_tree, cn, NULL, &idx) == NULL) { |
| uu_avl_insert(clp->cl_tree, cn, idx); |
| } else { |
| free(cn); |
| cn = NULL; |
| } |
| |
| if (!clp->cl_alldependents) |
| ret = zfs_iter_children(zhp, change_one, data); |
| |
| /* |
| * If we added the handle to the changelist, we will re-use it |
| * later so return without closing it. |
| */ |
| if (cn != NULL) |
| return (ret); |
| } |
| |
| out: |
| zfs_close(zhp); |
| return (ret); |
| } |
| |
| static int |
| compare_props(const void *a, const void *b, zfs_prop_t prop) |
| { |
| const prop_changenode_t *ca = a; |
| const prop_changenode_t *cb = b; |
| |
| char propa[MAXPATHLEN]; |
| char propb[MAXPATHLEN]; |
| |
| boolean_t haspropa, haspropb; |
| |
| haspropa = (zfs_prop_get(ca->cn_handle, prop, propa, sizeof (propa), |
| NULL, NULL, 0, B_FALSE) == 0); |
| haspropb = (zfs_prop_get(cb->cn_handle, prop, propb, sizeof (propb), |
| NULL, NULL, 0, B_FALSE) == 0); |
| |
| if (!haspropa && haspropb) |
| return (-1); |
| else if (haspropa && !haspropb) |
| return (1); |
| else if (!haspropa && !haspropb) |
| return (0); |
| else |
| return (strcmp(propb, propa)); |
| } |
| |
| /*ARGSUSED*/ |
| static int |
| compare_mountpoints(const void *a, const void *b, void *unused) |
| { |
| /* |
| * When unsharing or unmounting filesystems, we need to do it in |
| * mountpoint order. This allows the user to have a mountpoint |
| * hierarchy that is different from the dataset hierarchy, and still |
| * allow it to be changed. |
| */ |
| return (compare_props(a, b, ZFS_PROP_MOUNTPOINT)); |
| } |
| |
| /*ARGSUSED*/ |
| static int |
| compare_dataset_names(const void *a, const void *b, void *unused) |
| { |
| return (compare_props(a, b, ZFS_PROP_NAME)); |
| } |
| |
| /* |
| * Given a ZFS handle and a property, construct a complete list of datasets |
| * that need to be modified as part of this process. For anything but the |
| * 'mountpoint' and 'sharenfs' properties, this just returns an empty list. |
| * Otherwise, we iterate over all children and look for any datasets that |
| * inherit the property. For each such dataset, we add it to the list and |
| * mark whether it was shared beforehand. |
| */ |
| prop_changelist_t * |
| changelist_gather(zfs_handle_t *zhp, zfs_prop_t prop, int gather_flags, |
| int mnt_flags) |
| { |
| prop_changelist_t *clp; |
| prop_changenode_t *cn; |
| zfs_handle_t *temp; |
| char property[ZFS_MAXPROPLEN]; |
| boolean_t legacy = B_FALSE; |
| |
| if ((clp = zfs_alloc(zhp->zfs_hdl, sizeof (prop_changelist_t))) == NULL) |
| return (NULL); |
| |
| /* |
| * For mountpoint-related tasks, we want to sort everything by |
| * mountpoint, so that we mount and unmount them in the appropriate |
| * order, regardless of their position in the hierarchy. |
| */ |
| if (prop == ZFS_PROP_NAME || prop == ZFS_PROP_ZONED || |
| prop == ZFS_PROP_MOUNTPOINT || prop == ZFS_PROP_SHARENFS || |
| prop == ZFS_PROP_SHARESMB) { |
| |
| if (zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, |
| property, sizeof (property), |
| NULL, NULL, 0, B_FALSE) == 0 && |
| (strcmp(property, "legacy") == 0 || |
| strcmp(property, "none") == 0)) { |
| legacy = B_TRUE; |
| } |
| } |
| |
| clp->cl_pool = uu_avl_pool_create("changelist_pool", |
| sizeof (prop_changenode_t), |
| offsetof(prop_changenode_t, cn_treenode), |
| legacy ? compare_dataset_names : compare_mountpoints, 0); |
| if (clp->cl_pool == NULL) { |
| assert(uu_error() == UU_ERROR_NO_MEMORY); |
| (void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error"); |
| changelist_free(clp); |
| return (NULL); |
| } |
| |
| clp->cl_tree = uu_avl_create(clp->cl_pool, NULL, UU_DEFAULT); |
| clp->cl_gflags = gather_flags; |
| clp->cl_mflags = mnt_flags; |
| |
| if (clp->cl_tree == NULL) { |
| assert(uu_error() == UU_ERROR_NO_MEMORY); |
| (void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error"); |
| changelist_free(clp); |
| return (NULL); |
| } |
| |
| /* |
| * If this is a rename or the 'zoned' property, we pretend we're |
| * changing the mountpoint and flag it so we can catch all children in |
| * change_one(). |
| * |
| * Flag cl_alldependents to catch all children plus the dependents |
| * (clones) that are not in the hierarchy. |
| */ |
| if (prop == ZFS_PROP_NAME) { |
| clp->cl_prop = ZFS_PROP_MOUNTPOINT; |
| clp->cl_alldependents = B_TRUE; |
| } else if (prop == ZFS_PROP_ZONED) { |
| clp->cl_prop = ZFS_PROP_MOUNTPOINT; |
| clp->cl_allchildren = B_TRUE; |
| } else if (prop == ZFS_PROP_CANMOUNT) { |
| clp->cl_prop = ZFS_PROP_MOUNTPOINT; |
| } else if (prop == ZFS_PROP_VOLSIZE) { |
| clp->cl_prop = ZFS_PROP_MOUNTPOINT; |
| } else { |
| clp->cl_prop = prop; |
| } |
| clp->cl_realprop = prop; |
| |
| if (clp->cl_prop != ZFS_PROP_MOUNTPOINT && |
| clp->cl_prop != ZFS_PROP_SHARENFS && |
| clp->cl_prop != ZFS_PROP_SHARESMB) |
| return (clp); |
| |
| /* |
| * If watching SHARENFS or SHARESMB then |
| * also watch its companion property. |
| */ |
| if (clp->cl_prop == ZFS_PROP_SHARENFS) |
| clp->cl_shareprop = ZFS_PROP_SHARESMB; |
| else if (clp->cl_prop == ZFS_PROP_SHARESMB) |
| clp->cl_shareprop = ZFS_PROP_SHARENFS; |
| |
| if (clp->cl_prop == ZFS_PROP_MOUNTPOINT && |
| (clp->cl_gflags & CL_GATHER_ITER_MOUNTED)) { |
| /* |
| * Instead of iterating through all of the dataset children we |
| * gather mounted dataset children from MNTTAB |
| */ |
| if (zfs_iter_mounted(zhp, changelist_add_mounted, clp) != 0) { |
| changelist_free(clp); |
| return (NULL); |
| } |
| } else if (clp->cl_alldependents) { |
| if (zfs_iter_dependents(zhp, B_TRUE, change_one, clp) != 0) { |
| changelist_free(clp); |
| return (NULL); |
| } |
| } else if (zfs_iter_children(zhp, change_one, clp) != 0) { |
| changelist_free(clp); |
| return (NULL); |
| } |
| |
| /* |
| * We have to re-open ourselves because we auto-close all the handles |
| * and can't tell the difference. |
| */ |
| if ((temp = zfs_open(zhp->zfs_hdl, zfs_get_name(zhp), |
| ZFS_TYPE_DATASET)) == NULL) { |
| changelist_free(clp); |
| return (NULL); |
| } |
| |
| /* |
| * Always add ourself to the list. We add ourselves to the end so that |
| * we're the last to be unmounted. |
| */ |
| if ((cn = zfs_alloc(zhp->zfs_hdl, |
| sizeof (prop_changenode_t))) == NULL) { |
| zfs_close(temp); |
| changelist_free(clp); |
| return (NULL); |
| } |
| |
| cn->cn_handle = temp; |
| cn->cn_mounted = (clp->cl_gflags & CL_GATHER_MOUNT_ALWAYS) || |
| zfs_is_mounted(temp, NULL); |
| cn->cn_shared = zfs_is_shared(temp); |
| cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); |
| cn->cn_needpost = B_TRUE; |
| |
| uu_avl_node_init(cn, &cn->cn_treenode, clp->cl_pool); |
| uu_avl_index_t idx; |
| if (uu_avl_find(clp->cl_tree, cn, NULL, &idx) == NULL) { |
| uu_avl_insert(clp->cl_tree, cn, idx); |
| } else { |
| free(cn); |
| zfs_close(temp); |
| } |
| |
| /* |
| * If the mountpoint property was previously 'legacy', or 'none', |
| * record it as the behavior of changelist_postfix() will be different. |
| */ |
| if ((clp->cl_prop == ZFS_PROP_MOUNTPOINT) && legacy) { |
| /* |
| * do not automatically mount ex-legacy datasets if |
| * we specifically set canmount to noauto |
| */ |
| if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) != |
| ZFS_CANMOUNT_NOAUTO) |
| clp->cl_waslegacy = B_TRUE; |
| } |
| |
| return (clp); |
| } |