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-rw-r--r--lib/libzfs/libzfs_changelist.c805
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diff --git a/lib/libzfs/libzfs_changelist.c b/lib/libzfs/libzfs_changelist.c
deleted file mode 100644
index d290d949f4b2..000000000000
--- a/lib/libzfs/libzfs_changelist.c
+++ /dev/null
@@ -1,805 +0,0 @@
-// SPDX-License-Identifier: CDDL-1.0
-/*
- * 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 https://opensource.org/licenses/CDDL-1.0.
- * 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, 2020 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;
- const enum sa_protocol smb[] = {SA_PROTOCOL_SMB, SA_NO_PROTOCOL};
- boolean_t commit_smb_shares = B_FALSE;
-
- if (clp->cl_prop != ZFS_PROP_MOUNTPOINT &&
- clp->cl_prop != ZFS_PROP_SHARESMB)
- return (0);
-
- /*
- * If CL_GATHER_DONT_UNMOUNT is set, don't want to unmount/unshare and
- * later (re)mount/(re)share the filesystem in postfix phase, so we
- * return from here. If filesystem is mounted or unmounted, leave it
- * as it is.
- */
- if (clp->cl_gflags & CL_GATHER_DONT_UNMOUNT)
- 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(cn->cn_handle, NULL,
- smb);
- commit_smb_shares = B_TRUE;
- break;
-
- default:
- break;
- }
- }
- }
-
- if (commit_smb_shares)
- zfs_commit_shares(smb);
- 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 always remount/reshare the filesystem,
- * if CL_GATHER_DONT_UNMOUNT is not set.
- */
-int
-changelist_postfix(prop_changelist_t *clp)
-{
- prop_changenode_t *cn;
- uu_avl_walk_t *walk;
- char shareopts[ZFS_MAXPROPLEN];
- boolean_t commit_smb_shares = B_FALSE;
- boolean_t commit_nfs_shares = B_FALSE;
-
- /*
- * If CL_GATHER_DONT_UNMOUNT is set, it means we don't want to (un)mount
- * or (re/un)share the filesystem, so we return from here. If filesystem
- * is mounted or unmounted, leave it as it is.
- */
- if (clp->cl_gflags & CL_GATHER_DONT_UNMOUNT)
- return (0);
-
- /*
- * 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 &&
- !(clp->cl_gflags & CL_GATHER_DONT_UNMOUNT))
- remove_mountpoint(cn->cn_handle);
-
- /*
- * 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 ||
- (((clp->cl_prop == ZFS_PROP_MOUNTPOINT &&
- clp->cl_prop == clp->cl_realprop) ||
- 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)
- 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.
- */
- const enum sa_protocol nfs[] =
- {SA_PROTOCOL_NFS, SA_NO_PROTOCOL};
- if (sharenfs && mounted) {
- zfs_share(cn->cn_handle, nfs);
- commit_nfs_shares = B_TRUE;
- } else if (cn->cn_shared || clp->cl_waslegacy) {
- zfs_unshare(cn->cn_handle, NULL, nfs);
- commit_nfs_shares = B_TRUE;
- }
- const enum sa_protocol smb[] =
- {SA_PROTOCOL_SMB, SA_NO_PROTOCOL};
- if (sharesmb && mounted) {
- zfs_share(cn->cn_handle, smb);
- commit_smb_shares = B_TRUE;
- } else if (cn->cn_shared || clp->cl_waslegacy) {
- zfs_unshare(cn->cn_handle, NULL, smb);
- commit_smb_shares = B_TRUE;
- }
- }
-
- enum sa_protocol proto[SA_PROTOCOL_COUNT + 1], *p = proto;
- if (commit_nfs_shares)
- *p++ = SA_PROTOCOL_NFS;
- if (commit_smb_shares)
- *p++ = SA_PROTOCOL_SMB;
- *p++ = SA_NO_PROTOCOL;
- zfs_commit_shares(proto);
- uu_avl_walk_end(walk);
-
- return (0);
-}
-
-/*
- * Is this "dataset" a child of "parent"?
- */
-static 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, const enum sa_protocol *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(cn->cn_handle, NULL, proto) != 0)
- ret = -1;
- }
-
- for (const enum sa_protocol *p = proto; *p != SA_NO_PROTOCOL; ++p)
- sa_commit_shares(*p);
- 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);
-
- cn = zfs_alloc(zfs_get_handle(zhp), sizeof (prop_changenode_t));
- 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, NULL, NULL);
- 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))) {
- cn = zfs_alloc(zfs_get_handle(zhp), sizeof (prop_changenode_t));
- 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, NULL, NULL);
- 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) {
- if (clp->cl_prop != ZFS_PROP_MOUNTPOINT) {
- ret = zfs_iter_filesystems_v2(zhp, 0,
- change_one, data);
- } else {
- ret = zfs_iter_children_v2(zhp, 0, 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));
-}
-
-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.
- */
- (void) unused;
- return (compare_props(a, b, ZFS_PROP_MOUNTPOINT));
-}
-
-static int
-compare_dataset_names(const void *a, const void *b, void *unused)
-{
- (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;
-
- clp = zfs_alloc(zhp->zfs_hdl, sizeof (prop_changelist_t));
-
- /*
- * 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_v2(zhp, 0, B_TRUE, change_one,
- clp) != 0) {
- changelist_free(clp);
- return (NULL);
- }
- } else if (clp->cl_prop != ZFS_PROP_MOUNTPOINT) {
- if (zfs_iter_filesystems_v2(zhp, 0, change_one, clp) != 0) {
- changelist_free(clp);
- return (NULL);
- }
- } else if (zfs_iter_children_v2(zhp, 0, 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.
- */
- cn = zfs_alloc(zhp->zfs_hdl, sizeof (prop_changenode_t));
- 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, NULL, NULL);
- 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);
-}