tools/lvrename.c

   1 /*
   2  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   3  * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
   4  *
   5  * This file is part of LVM2.
   6  *
   7  * This copyrighted material is made available to anyone wishing to use,
   8  * modify, copy, or redistribute it subject to the terms and conditions
   9  * of the GNU Lesser General Public License v.2.1.
  10  *
  11  * You should have received a copy of the GNU Lesser General Public License
  12  * along with this program; if not, write to the Free Software Foundation,
  13  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  14  */
  15
  16 #include "tools.h"
  17 #include "lvm-types.h"
  18
  19
  20 /*
  21  * lvrename command implementation.
  22  * Check arguments and call lv_rename() to execute the request.
  23  */
  24 int lvrename(struct cmd_context *cmd, int argc, char **argv)
  25 {
  26         size_t maxlen;
  27         char *lv_name_old, *lv_name_new;
  28         const char *vg_name, *vg_name_new, *vg_name_old;
  29         char *st;
  30         int r = ECMD_FAILED;
  31
  32         struct volume_group *vg = NULL;
  33         struct lv_list *lvl;
  34
  35         if (argc == 3) {
  36                 vg_name = skip_dev_dir(cmd, argv[0], NULL);
  37                 lv_name_old = argv[1];
  38                 lv_name_new = argv[2];
  39                 if (strchr(lv_name_old, '/') &&
  40                     (vg_name_old = extract_vgname(cmd, lv_name_old)) &&
  41                     strcmp(vg_name_old, vg_name)) {
  42                         log_error("Please use a single volume group name "
  43                                   "(\"%s\" or \"%s\")", vg_name, vg_name_old);
  44                         return EINVALID_CMD_LINE;
  45                 }
  46         } else if (argc == 2) {
  47                 lv_name_old = argv[0];
  48                 lv_name_new = argv[1];
  49                 vg_name = extract_vgname(cmd, lv_name_old);
  50         } else {
  51                 log_error("Old and new logical volume names required");
  52                 return EINVALID_CMD_LINE;
  53         }
  54
  55         if (!validate_name(vg_name)) {
  56                 log_error("Please provide a valid volume group name");
  57                 return EINVALID_CMD_LINE;
  58         }
  59
  60         if (strchr(lv_name_new, '/') &&
  61             (vg_name_new = extract_vgname(cmd, lv_name_new)) &&
  62             strcmp(vg_name, vg_name_new)) {
  63                 log_error("Logical volume names must "
  64                           "have the same volume group (\"%s\" or \"%s\")",
  65                           vg_name, vg_name_new);
  66                 return EINVALID_CMD_LINE;
  67         }
  68
  69         if ((st = strrchr(lv_name_old, '/')))
  70                 lv_name_old = st + 1;
  71
  72         if ((st = strrchr(lv_name_new, '/')))
  73                 lv_name_new = st + 1;
  74
  75         /* Check sanity of new name */
  76         maxlen = NAME_LEN - strlen(vg_name) - strlen(cmd->dev_dir) - 3;
  77         if (strlen(lv_name_new) > maxlen) {
  78                 log_error("New logical volume path exceeds maximum length "
  79                           "of %" PRIsize_t "!", maxlen);
  80                 return ECMD_FAILED;
  81         }
  82
  83         if (!*lv_name_new) {
  84                 log_error("New logical volume name may not be blank");
  85                 return ECMD_FAILED;
  86         }
  87
  88         if (!apply_lvname_restrictions(lv_name_new)) {
  89                 stack;
  90                 return ECMD_FAILED;
  91         }
  92
  93         if (!validate_name(lv_name_new)) {
  94                 log_error("New logical volume name \"%s\" is invalid",
  95                      lv_name_new);
  96                 return EINVALID_CMD_LINE;
  97         }
  98
  99         if (!strcmp(lv_name_old, lv_name_new)) {
 100                 log_error("Old and new logical volume names must differ");
 101                 return EINVALID_CMD_LINE;
 102         }
 103
 104         log_verbose("Checking for existing volume group \"%s\"", vg_name);
 105         vg = vg_read_for_update(cmd, vg_name, NULL, 0);
 106         if (vg_read_error(vg)) {
 107                 release_vg(vg);
 108                 stack;
 109                 return ECMD_FAILED;
 110         }
 111
 112         if (!(lvl = find_lv_in_vg(vg, lv_name_old))) {
 113                 log_error("Existing logical volume \"%s\" not found in "
 114                           "volume group \"%s\"", lv_name_old, vg_name);
 115                 goto error;
 116         }
 117
 118         if (lvl->lv->status & (RAID_IMAGE | RAID_META)) {
 119                 log_error("Cannot rename a RAID %s directly",
 120                           (lvl->lv->status & RAID_IMAGE) ? "image" :
 121                           "metadata area");
 122                 r = ECMD_FAILED;
 123                 goto error;
 124         }
 125
 126         if (lv_is_raid_with_tracking(lvl->lv)) {
 127                 log_error("Cannot rename %s while it is tracking a split image",
 128                           lvl->lv->name);
 129                 r = ECMD_FAILED;
 130                 goto error;
 131         }
 132
 133         if (!lv_rename(cmd, lvl->lv, lv_name_new))
 134                 goto error;
 135
 136         log_print("Renamed \"%s\" to \"%s\" in volume group \"%s\"",
 137                   lv_name_old, lv_name_new, vg_name);
 138
 139         r = ECMD_PROCESSED;
 140 error:
 141         unlock_and_release_vg(cmd, vg, vg_name);
 142         return r;
 143 }