be_rename.c revision 6a9cb0ea17f11529b1bb8ca31944abd37736b99e
/*
* 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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012 by Delphix. All rights reserved.
*/
#include <assert.h>
#include <libintl.h>
#include <libnvpair.h>
#include <libzfs.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <libbe.h>
#include <libbe_priv.h>
/* ******************************************************************** */
/* Public Functions */
/* ******************************************************************** */
/*
* Function: be_rename
* Description: Renames the BE from the original name to the new name
* passed in through be_attrs. Also the entries in vfstab and
* menu.lst are updated with the new name.
* Parameters:
* be_attrs - pointer to nvlist_t of attributes being passed in.
* The following attribute values are used by
* this function:
*
* BE_ATTR_ORIG_BE_NAME *required
* BE_ATTR_NEW_BE_NAME *required
* Return:
* BE_SUCCESS - Success
* be_errno_t - Failure
* Scope:
* Public
*/
int
be_rename(nvlist_t *be_attrs)
{
be_transaction_data_t bt = { 0 };
be_transaction_data_t cbt = { 0 };
be_fs_list_data_t fld = { 0 };
zfs_handle_t *zhp = NULL;
char root_ds[MAXPATHLEN];
char *mp = NULL;
int zret = 0, ret = BE_SUCCESS;
/* Initialize libzfs handle */
if (!be_zfs_init())
return (BE_ERR_INIT);
/* Get original BE name to rename from */
if (nvlist_lookup_string(be_attrs, BE_ATTR_ORIG_BE_NAME, &bt.obe_name)
!= 0) {
be_print_err(gettext("be_rename: failed to "
"lookup BE_ATTR_ORIG_BE_NAME attribute\n"));
be_zfs_fini();
return (BE_ERR_INVAL);
}
/* Get new BE name to rename to */
if (nvlist_lookup_string(be_attrs, BE_ATTR_NEW_BE_NAME, &bt.nbe_name)
!= 0) {
be_print_err(gettext("be_rename: failed to "
"lookup BE_ATTR_NEW_BE_NAME attribute\n"));
be_zfs_fini();
return (BE_ERR_INVAL);
}
/*
* Get the currently active BE and check to see if this
* is an attempt to rename the currently active BE.
*/
if (be_find_current_be(&cbt) != BE_SUCCESS) {
be_print_err(gettext("be_rename: failed to find the currently "
"active BE\n"));
be_zfs_fini();
return (BE_ERR_CURR_BE_NOT_FOUND);
}
if (strncmp(bt.obe_name, cbt.obe_name,
MAX(strlen(bt.obe_name), strlen(cbt.obe_name))) == 0) {
be_print_err(gettext("be_rename: This is an attempt to rename "
"the currently active BE, which is not supported\n"));
be_zfs_fini();
free(cbt.obe_name);
return (BE_ERR_RENAME_ACTIVE);
}
/* Validate original BE name */
if (!be_valid_be_name(bt.obe_name)) {
be_print_err(gettext("be_rename: "
"invalid BE name %s\n"), bt.obe_name);
be_zfs_fini();
return (BE_ERR_INVAL);
}
/* Validate new BE name */
if (!be_valid_be_name(bt.nbe_name)) {
be_print_err(gettext("be_rename: invalid BE name %s\n"),
bt.nbe_name);
be_zfs_fini();
return (BE_ERR_INVAL);
}
/* Find which zpool the BE is in */
if ((zret = zpool_iter(g_zfs, be_find_zpool_callback, &bt)) == 0) {
be_print_err(gettext("be_rename: failed to "
"find zpool for BE (%s)\n"), bt.obe_name);
be_zfs_fini();
return (BE_ERR_BE_NOENT);
} else if (zret < 0) {
be_print_err(gettext("be_rename: zpool_iter failed: %s\n"),
libzfs_error_description(g_zfs));
ret = zfs_err_to_be_err(g_zfs);
be_zfs_fini();
return (ret);
}
/* New BE will reside in the same zpool as orig BE */
bt.nbe_zpool = bt.obe_zpool;
be_make_root_ds(bt.obe_zpool, bt.obe_name, root_ds, sizeof (root_ds));
bt.obe_root_ds = strdup(root_ds);
be_make_root_ds(bt.nbe_zpool, bt.nbe_name, root_ds, sizeof (root_ds));
bt.nbe_root_ds = strdup(root_ds);
/*
* Generate a list of file systems from the BE that are legacy
* mounted before renaming. We use this list to determine which
* entries in the vfstab we need to update after we've renamed the BE.
*/
if ((ret = be_get_legacy_fs(bt.obe_name, bt.obe_root_ds, NULL, NULL,
&fld)) != BE_SUCCESS) {
be_print_err(gettext("be_rename: failed to "
"get legacy mounted file system list for %s\n"),
bt.obe_name);
goto done;
}
/* Get handle to BE's root dataset */
if ((zhp = zfs_open(g_zfs, bt.obe_root_ds, ZFS_TYPE_FILESYSTEM))
== NULL) {
be_print_err(gettext("be_rename: failed to "
"open BE root dataset (%s): %s\n"),
bt.obe_root_ds, libzfs_error_description(g_zfs));
ret = zfs_err_to_be_err(g_zfs);
goto done;
}
/* Rename of BE's root dataset. */
if (zfs_rename(zhp, bt.nbe_root_ds, B_FALSE, B_FALSE) != 0) {
be_print_err(gettext("be_rename: failed to "
"rename dataset (%s): %s\n"), bt.obe_root_ds,
libzfs_error_description(g_zfs));
ret = zfs_err_to_be_err(g_zfs);
goto done;
}
/* Refresh handle to BE's root dataset after the rename */
ZFS_CLOSE(zhp);
if ((zhp = zfs_open(g_zfs, bt.nbe_root_ds, ZFS_TYPE_FILESYSTEM))
== NULL) {
be_print_err(gettext("be_rename: failed to "
"open BE root dataset (%s): %s\n"),
bt.obe_root_ds, libzfs_error_description(g_zfs));
ret = zfs_err_to_be_err(g_zfs);
goto done;
}
/* If BE is already mounted, get its mountpoint */
if (zfs_is_mounted(zhp, &mp) && mp == NULL) {
be_print_err(gettext("be_rename: failed to "
"get altroot of mounted BE %s: %s\n"),
bt.nbe_name, libzfs_error_description(g_zfs));
ret = zfs_err_to_be_err(g_zfs);
goto done;
}
/* Update BE's vfstab */
if ((ret = be_update_vfstab(bt.nbe_name, bt.obe_zpool, bt.nbe_zpool,
&fld, mp)) != BE_SUCCESS) {
be_print_err(gettext("be_rename: "
"failed to update new BE's vfstab (%s)\n"), bt.nbe_name);
goto done;
}
/* Update this BE's GRUB menu entry */
if (getzoneid() == GLOBAL_ZONEID && (ret = be_update_menu(bt.obe_name,
bt.nbe_name, bt.obe_zpool, NULL)) != BE_SUCCESS) {
be_print_err(gettext("be_rename: "
"failed to update grub menu entry from %s to %s\n"),
bt.obe_name, bt.nbe_name);
}
done:
be_free_fs_list(&fld);
ZFS_CLOSE(zhp);
be_zfs_fini();
free(bt.obe_root_ds);
free(bt.nbe_root_ds);
return (ret);
}