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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <libintl.h>
#include <libzfs.h>
#include <sys/mount.h>
#include "zpool_util.h"
/*
* For export and destroy, we have to support iterating over all datasets and
* unmounting and/or destroying them. This file contains the routines to
* support this.
*/
typedef struct cbdata {
int cb_force;
int cb_failed;
const char *cb_mntopts;
} cbdata_t;
/*
* Unmount a single ZFS dataset.
*/
int
do_unmount(zfs_handle_t *zfsp, void *data)
{
cbdata_t *cbp = data;
if (zfs_unmount(zfsp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0)
cbp->cb_failed = 1;
return (0);
}
/*
* Unmount all datasets within the given pool.
*
* XXZFS it would be much more efficient, and correct, to iterate over
* mountpoints based on /etc/mnttab.
*/
int
unmount_datasets(zpool_handle_t *zhp, int force)
{
cbdata_t cb = { 0 };
zfs_handle_t *zfsp;
/* For unavailable pools, we don't do anything */
if (zpool_get_state(zhp) == POOL_STATE_UNAVAIL)
return (0);
if ((zfsp = zfs_open(zpool_get_name(zhp), ZFS_TYPE_FILESYSTEM)) == NULL)
return (-1);
cb.cb_force = force;
if (zfs_iter_dependents(zfsp, do_unmount, &cb) != 0 ||
cb.cb_failed != 0) {
zfs_close(zfsp);
return (-1);
}
if (do_unmount(zfsp, &cb) != 0 || cb.cb_failed != 0) {
zfs_close(zfsp);
return (-1);
}
zfs_close(zfsp);
return (0);
}
/*
* Mount a single dataset
*/
static int
do_mount(zfs_handle_t *zfsp, void *data)
{
cbdata_t *cbp = data;
int ret;
if (zfs_get_type(zfsp) != ZFS_TYPE_FILESYSTEM)
return (0);
if (zfs_mount(zfsp, cbp->cb_mntopts, 0) != 0)
cbp->cb_failed = 1;
ret = zfs_iter_children(zfsp, do_mount, data);
return (ret);
}
/*
* Go through and mount all datasets within a pool. We need to mount all
* datasets in order, so that we mount parents before any children. A complete
* fix would gather all mountpoints, sort them, and mount them in lexical order.
* There are many more problems if you start to have nested filesystems - we
* just want to get inherited filesystems right.
*/
int
mount_datasets(zpool_handle_t *zhp, const char *options)
{
cbdata_t cb = { 0 };
zfs_handle_t *zfsp;
cb.cb_mntopts = options;
/* For unavailable pools, we don't do anything */
if (zpool_get_state(zhp) == POOL_STATE_UNAVAIL)
return (0);
if ((zfsp = zfs_open(zpool_get_name(zhp), ZFS_TYPE_FILESYSTEM)) == NULL)
return (-1);
if (do_mount(zfsp, &cb) != 0 || cb.cb_failed != 0) {
zfs_close(zfsp);
return (-1);
}
zfs_close(zfsp);
return (0);
}
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