be_rename.c revision 13013:3c7681e3e323
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26#include <assert.h> 27#include <libintl.h> 28#include <libnvpair.h> 29#include <libzfs.h> 30#include <stdio.h> 31#include <stdlib.h> 32#include <string.h> 33#include <sys/types.h> 34#include <sys/stat.h> 35#include <unistd.h> 36 37#include <libbe.h> 38#include <libbe_priv.h> 39 40/* ******************************************************************** */ 41/* Public Functions */ 42/* ******************************************************************** */ 43 44/* 45 * Function: be_rename 46 * Description: Renames the BE from the original name to the new name 47 * passed in through be_attrs. Also the entries in vfstab and 48 * menu.lst are updated with the new name. 49 * Parameters: 50 * be_attrs - pointer to nvlist_t of attributes being passed in. 51 * The following attribute values are used by 52 * this function: 53 * 54 * BE_ATTR_ORIG_BE_NAME *required 55 * BE_ATTR_NEW_BE_NAME *required 56 * Return: 57 * BE_SUCCESS - Success 58 * be_errno_t - Failure 59 * Scope: 60 * Public 61 */ 62 63int 64be_rename(nvlist_t *be_attrs) 65{ 66 be_transaction_data_t bt = { 0 }; 67 be_transaction_data_t cbt = { 0 }; 68 be_fs_list_data_t fld = { 0 }; 69 zfs_handle_t *zhp = NULL; 70 char root_ds[MAXPATHLEN]; 71 char *mp = NULL; 72 int zret = 0, ret = BE_SUCCESS; 73 74 /* Initialize libzfs handle */ 75 if (!be_zfs_init()) 76 return (BE_ERR_INIT); 77 78 /* Get original BE name to rename from */ 79 if (nvlist_lookup_string(be_attrs, BE_ATTR_ORIG_BE_NAME, &bt.obe_name) 80 != 0) { 81 be_print_err(gettext("be_rename: failed to " 82 "lookup BE_ATTR_ORIG_BE_NAME attribute\n")); 83 be_zfs_fini(); 84 return (BE_ERR_INVAL); 85 } 86 87 /* Get new BE name to rename to */ 88 if (nvlist_lookup_string(be_attrs, BE_ATTR_NEW_BE_NAME, &bt.nbe_name) 89 != 0) { 90 be_print_err(gettext("be_rename: failed to " 91 "lookup BE_ATTR_NEW_BE_NAME attribute\n")); 92 be_zfs_fini(); 93 return (BE_ERR_INVAL); 94 } 95 96 /* 97 * Get the currently active BE and check to see if this 98 * is an attempt to rename the currently active BE. 99 */ 100 if (be_find_current_be(&cbt) != BE_SUCCESS) { 101 be_print_err(gettext("be_rename: failed to find the currently " 102 "active BE\n")); 103 be_zfs_fini(); 104 return (BE_ERR_CURR_BE_NOT_FOUND); 105 } 106 107 if (strncmp(bt.obe_name, cbt.obe_name, 108 MAX(strlen(bt.obe_name), strlen(cbt.obe_name))) == 0) { 109 be_print_err(gettext("be_rename: This is an attempt to rename " 110 "the currently active BE, which is not supported\n")); 111 be_zfs_fini(); 112 free(cbt.obe_name); 113 return (BE_ERR_RENAME_ACTIVE); 114 } 115 116 /* Validate original BE name */ 117 if (!be_valid_be_name(bt.obe_name)) { 118 be_print_err(gettext("be_rename: " 119 "invalid BE name %s\n"), bt.obe_name); 120 be_zfs_fini(); 121 return (BE_ERR_INVAL); 122 } 123 124 /* Validate new BE name */ 125 if (!be_valid_be_name(bt.nbe_name)) { 126 be_print_err(gettext("be_rename: invalid BE name %s\n"), 127 bt.nbe_name); 128 be_zfs_fini(); 129 return (BE_ERR_INVAL); 130 } 131 132 /* Find which zpool the BE is in */ 133 if ((zret = zpool_iter(g_zfs, be_find_zpool_callback, &bt)) == 0) { 134 be_print_err(gettext("be_rename: failed to " 135 "find zpool for BE (%s)\n"), bt.obe_name); 136 be_zfs_fini(); 137 return (BE_ERR_BE_NOENT); 138 } else if (zret < 0) { 139 be_print_err(gettext("be_rename: zpool_iter failed: %s\n"), 140 libzfs_error_description(g_zfs)); 141 ret = zfs_err_to_be_err(g_zfs); 142 be_zfs_fini(); 143 return (ret); 144 } 145 146 /* New BE will reside in the same zpool as orig BE */ 147 bt.nbe_zpool = bt.obe_zpool; 148 149 be_make_root_ds(bt.obe_zpool, bt.obe_name, root_ds, sizeof (root_ds)); 150 bt.obe_root_ds = strdup(root_ds); 151 be_make_root_ds(bt.nbe_zpool, bt.nbe_name, root_ds, sizeof (root_ds)); 152 bt.nbe_root_ds = strdup(root_ds); 153 154 /* 155 * Generate a list of file systems from the BE that are legacy 156 * mounted before renaming. We use this list to determine which 157 * entries in the vfstab we need to update after we've renamed the BE. 158 */ 159 if ((ret = be_get_legacy_fs(bt.obe_name, bt.obe_root_ds, NULL, NULL, 160 &fld)) != BE_SUCCESS) { 161 be_print_err(gettext("be_rename: failed to " 162 "get legacy mounted file system list for %s\n"), 163 bt.obe_name); 164 goto done; 165 } 166 167 /* Get handle to BE's root dataset */ 168 if ((zhp = zfs_open(g_zfs, bt.obe_root_ds, ZFS_TYPE_FILESYSTEM)) 169 == NULL) { 170 be_print_err(gettext("be_rename: failed to " 171 "open BE root dataset (%s): %s\n"), 172 bt.obe_root_ds, libzfs_error_description(g_zfs)); 173 ret = zfs_err_to_be_err(g_zfs); 174 goto done; 175 } 176 177 /* Rename of BE's root dataset. */ 178 if (zfs_rename(zhp, bt.nbe_root_ds, B_FALSE) != 0) { 179 be_print_err(gettext("be_rename: failed to " 180 "rename dataset (%s): %s\n"), bt.obe_root_ds, 181 libzfs_error_description(g_zfs)); 182 ret = zfs_err_to_be_err(g_zfs); 183 goto done; 184 } 185 186 /* Refresh handle to BE's root dataset after the rename */ 187 ZFS_CLOSE(zhp); 188 if ((zhp = zfs_open(g_zfs, bt.nbe_root_ds, ZFS_TYPE_FILESYSTEM)) 189 == NULL) { 190 be_print_err(gettext("be_rename: failed to " 191 "open BE root dataset (%s): %s\n"), 192 bt.obe_root_ds, libzfs_error_description(g_zfs)); 193 ret = zfs_err_to_be_err(g_zfs); 194 goto done; 195 } 196 197 /* If BE is already mounted, get its mountpoint */ 198 if (zfs_is_mounted(zhp, &mp) && mp == NULL) { 199 be_print_err(gettext("be_rename: failed to " 200 "get altroot of mounted BE %s: %s\n"), 201 bt.nbe_name, libzfs_error_description(g_zfs)); 202 ret = zfs_err_to_be_err(g_zfs); 203 goto done; 204 } 205 206 /* Update BE's vfstab */ 207 if ((ret = be_update_vfstab(bt.nbe_name, bt.obe_zpool, bt.nbe_zpool, 208 &fld, mp)) != BE_SUCCESS) { 209 be_print_err(gettext("be_rename: " 210 "failed to update new BE's vfstab (%s)\n"), bt.nbe_name); 211 goto done; 212 } 213 214 /* Update this BE's GRUB menu entry */ 215 if (getzoneid() == GLOBAL_ZONEID && (ret = be_update_menu(bt.obe_name, 216 bt.nbe_name, bt.obe_zpool, NULL)) != BE_SUCCESS) { 217 be_print_err(gettext("be_rename: " 218 "failed to update grub menu entry from %s to %s\n"), 219 bt.obe_name, bt.nbe_name); 220 } 221 222done: 223 be_free_fs_list(&fld); 224 225 ZFS_CLOSE(zhp); 226 227 be_zfs_fini(); 228 229 free(bt.obe_root_ds); 230 free(bt.nbe_root_ds); 231 return (ret); 232} 233