external/gpl2/lvm2/dist/tools/lvrename.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   5  * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
   6  *
   7  * This file is part of LVM2.
   8  *
   9  * This copyrighted material is made available to anyone wishing to use,
  10  * modify, copy, or redistribute it subject to the terms and conditions
  11  * of the GNU Lesser General Public License v.2.1.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #include "tools.h"
  19 #include "lvm-types.h"
  20
  21
  22 /*
  23  * lvrename command implementation.
  24  * Check arguments and call lv_rename() to execute the request.
  25  */
  26 int lvrename(struct cmd_context *cmd, int argc, char **argv)
  27 {
  28         size_t maxlen;
  29         char *lv_name_old, *lv_name_new;
  30         const char *vg_name, *vg_name_new, *vg_name_old;
  31         char *st;
  32         int r = ECMD_FAILED;
  33
  34         struct volume_group *vg = NULL;
  35         struct lv_list *lvl;
  36
  37         if (argc == 3) {
  38                 vg_name = skip_dev_dir(cmd, argv[0], NULL);
  39                 lv_name_old = argv[1];
  40                 lv_name_new = argv[2];
  41                 if (strchr(lv_name_old, '/') &&
  42                     (vg_name_old = extract_vgname(cmd, lv_name_old)) &&
  43                     strcmp(vg_name_old, vg_name)) {
  44                         log_error("Please use a single volume group name "
  45                                   "(\"%s\" or \"%s\")", vg_name, vg_name_old);
  46                         return EINVALID_CMD_LINE;
  47                 }
  48         } else if (argc == 2) {
  49                 lv_name_old = argv[0];
  50                 lv_name_new = argv[1];
  51                 vg_name = extract_vgname(cmd, lv_name_old);
  52         } else {
  53                 log_error("Old and new logical volume names required");
  54                 return EINVALID_CMD_LINE;
  55         }
  56
  57         if (!validate_name(vg_name)) {
  58                 log_error("Please provide a valid volume group name");
  59                 return EINVALID_CMD_LINE;
  60         }
  61
  62         if (strchr(lv_name_new, '/') &&
  63             (vg_name_new = extract_vgname(cmd, lv_name_new)) &&
  64             strcmp(vg_name, vg_name_new)) {
  65                 log_error("Logical volume names must "
  66                           "have the same volume group (\"%s\" or \"%s\")",
  67                           vg_name, vg_name_new);
  68                 return EINVALID_CMD_LINE;
  69         }
  70
  71         if ((st = strrchr(lv_name_old, '/')))
  72                 lv_name_old = st + 1;
  73
  74         if ((st = strrchr(lv_name_new, '/')))
  75                 lv_name_new = st + 1;
  76
  77         /* Check sanity of new name */
  78         maxlen = NAME_LEN - strlen(vg_name) - strlen(cmd->dev_dir) - 3;
  79         if (strlen(lv_name_new) > maxlen) {
  80                 log_error("New logical volume path exceeds maximum length "
  81                           "of %" PRIsize_t "!", maxlen);
  82                 return ECMD_FAILED;
  83         }
  84
  85         if (!*lv_name_new) {
  86                 log_error("New logical volume name may not be blank");
  87                 return ECMD_FAILED;
  88         }
  89
  90         if (!apply_lvname_restrictions(lv_name_new)) {
  91                 stack;
  92                 return ECMD_FAILED;
  93         }
  94
  95         if (!validate_name(lv_name_new)) {
  96                 log_error("New logical volume name \"%s\" is invalid",
  97                      lv_name_new);
  98                 return EINVALID_CMD_LINE;
  99         }
 100
 101         if (!strcmp(lv_name_old, lv_name_new)) {
 102                 log_error("Old and new logical volume names must differ");
 103                 return EINVALID_CMD_LINE;
 104         }
 105
 106         log_verbose("Checking for existing volume group \"%s\"", vg_name);
 107         vg = vg_read_for_update(cmd, vg_name, NULL, 0);
 108         if (vg_read_error(vg)) {
 109                 vg_release(vg);
 110                 stack;
 111                 return ECMD_FAILED;
 112         }
 113
 114         if (!(lvl = find_lv_in_vg(vg, lv_name_old))) {
 115                 log_error("Existing logical volume \"%s\" not found in "
 116                           "volume group \"%s\"", lv_name_old, vg_name);
 117                 goto error;
 118         }
 119
 120         if (!lv_rename(cmd, lvl->lv, lv_name_new))
 121                 goto error;
 122
 123         log_print("Renamed \"%s\" to \"%s\" in volume group \"%s\"",
 124                   lv_name_old, lv_name_new, vg_name);
 125
 126         r = ECMD_PROCESSED;
 127 error:
 128         unlock_and_release_vg(cmd, vg, vg_name);
 129         return r;
 130 }