tools/vgconvert.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
  18 static int vgconvert_single(struct cmd_context *cmd, const char *vg_name,
  19                             struct volume_group *vg,
  20                             void *handle __attribute__((unused)))
  21 {
  22         struct physical_volume *pv, *existing_pv;
  23         struct logical_volume *lv;
  24         struct lv_list *lvl;
  25         uint64_t size = 0;
  26         struct dm_list mdas;
  27         int pvmetadatacopies = 0;
  28         uint64_t pvmetadatasize = 0;
  29         uint64_t pe_end = 0, pe_start = 0;
  30         struct pv_list *pvl;
  31         int change_made = 0;
  32         struct lvinfo info;
  33         int active = 0;
  34
  35         if (!vg_check_status(vg, LVM_WRITE | EXPORTED_VG)) {
  36                 stack;
  37                 return ECMD_FAILED;
  38         }
  39
  40         if (vg->fid->fmt == cmd->fmt) {
  41                 log_error("Volume group \"%s\" already uses format %s",
  42                           vg_name, cmd->fmt->name);
  43                 return ECMD_FAILED;
  44         }
  45
  46         if (cmd->fmt->features & FMT_MDAS) {
  47                 if (arg_sign_value(cmd, metadatasize_ARG, 0) == SIGN_MINUS) {
  48                         log_error("Metadata size may not be negative");
  49                         return EINVALID_CMD_LINE;
  50                 }
  51
  52                 pvmetadatasize = arg_uint64_value(cmd, metadatasize_ARG,
  53                                                   UINT64_C(0));
  54                 if (!pvmetadatasize)
  55                         pvmetadatasize =
  56                             find_config_tree_int(cmd,
  57                                             "metadata/pvmetadatasize",
  58                                             DEFAULT_PVMETADATASIZE);
  59
  60                 pvmetadatacopies = arg_int_value(cmd, pvmetadatacopies_ARG, -1);
  61                 if (pvmetadatacopies < 0)
  62                         pvmetadatacopies =
  63                             find_config_tree_int(cmd,
  64                                             "metadata/pvmetadatacopies",
  65                                              DEFAULT_PVMETADATACOPIES);
  66         }
  67
  68         if (!archive(vg)) {
  69                 log_error("Archive of \"%s\" metadata failed.", vg_name);
  70                 return ECMD_FAILED;
  71         }
  72
  73         /* Set PV/LV limit if converting from unlimited metadata format */
  74         if (vg->fid->fmt->features & FMT_UNLIMITED_VOLS &&
  75             !(cmd->fmt->features & FMT_UNLIMITED_VOLS)) {
  76                 if (!vg->max_lv)
  77                         vg->max_lv = 255;
  78                 if (!vg->max_pv)
  79                         vg->max_pv = 255;
  80         }
  81
  82         /* If converting to restricted lvid, check if lvid is compatible */
  83         if (!(vg->fid->fmt->features & FMT_RESTRICTED_LVIDS) &&
  84             cmd->fmt->features & FMT_RESTRICTED_LVIDS)
  85                 dm_list_iterate_items(lvl, &vg->lvs)
  86                         if (!lvid_in_restricted_range(&lvl->lv->lvid)) {
  87                                 log_error("Logical volume %s lvid format is"
  88                                           " incompatible with requested"
  89                                           " metadata format.", lvl->lv->name);
  90                                 return ECMD_FAILED;
  91                         }
  92
  93         /* Attempt to change any LVIDs that are too big */
  94         if (cmd->fmt->features & FMT_RESTRICTED_LVIDS) {
  95                 dm_list_iterate_items(lvl, &vg->lvs) {
  96                         lv = lvl->lv;
  97                         if (lv->status & SNAPSHOT)
  98                                 continue;
  99                         if (lvnum_from_lvid(&lv->lvid) < MAX_RESTRICTED_LVS)
 100                                 continue;
 101                         if (lv_info(cmd, lv, 0, &info, 0, 0) && info.exists) {
 102                                 log_error("Logical volume %s must be "
 103                                           "deactivated before conversion.",
 104                                            lv->name);
 105                                 active++;
 106                                 continue;
 107                         }
 108                         lvid_from_lvnum(&lv->lvid, &lv->vg->id, find_free_lvnum(lv));
 109
 110                 }
 111         }
 112
 113         if (active) {
 114                 stack;
 115                 return ECMD_FAILED;
 116         }
 117
 118         dm_list_iterate_items(pvl, &vg->pvs) {
 119                 existing_pv = pvl->pv;
 120
 121                 pe_start = pv_pe_start(existing_pv);
 122                 pe_end = pv_pe_count(existing_pv) * pv_pe_size(existing_pv)
 123                     + pe_start - 1;
 124
 125                 dm_list_init(&mdas);
 126                 if (!(pv = pv_create(cmd, pv_dev(existing_pv),
 127                                      &existing_pv->id, size, 0, 0,
 128                                      pe_start, pv_pe_count(existing_pv),
 129                                      pv_pe_size(existing_pv), pvmetadatacopies,
 130                                      pvmetadatasize, 0, &mdas))) {
 131                         log_error("Failed to setup physical volume \"%s\"",
 132                                   pv_dev_name(existing_pv));
 133                         if (change_made)
 134                                 log_error("Use pvcreate and vgcfgrestore to "
 135                                           "repair from archived metadata.");
 136                         return ECMD_FAILED;
 137                 }
 138
 139                 /* Need to revert manually if it fails after this point */
 140                 change_made = 1;
 141
 142                 log_verbose("Set up physical volume for \"%s\" with %" PRIu64
 143                             " available sectors", pv_dev_name(pv), pv_size(pv));
 144
 145                 /* Wipe existing label first */
 146                 if (!label_remove(pv_dev(pv))) {
 147                         log_error("Failed to wipe existing label on %s",
 148                                   pv_dev_name(pv));
 149                         log_error("Use pvcreate and vgcfgrestore to repair "
 150                                   "from archived metadata.");
 151                         return ECMD_FAILED;
 152                 }
 153
 154                 log_very_verbose("Writing physical volume data to disk \"%s\"",
 155                                  pv_dev_name(pv));
 156                 if (!(pv_write(cmd, pv, &mdas,
 157                                arg_int64_value(cmd, labelsector_ARG,
 158                                                DEFAULT_LABELSECTOR)))) {
 159                         log_error("Failed to write physical volume \"%s\"",
 160                                   pv_dev_name(pv));
 161                         log_error("Use pvcreate and vgcfgrestore to repair "
 162                                   "from archived metadata.");
 163                         return ECMD_FAILED;
 164                 }
 165                 log_verbose("Physical volume \"%s\" successfully created",
 166                             pv_dev_name(pv));
 167
 168         }
 169
 170         log_verbose("Deleting existing metadata for VG %s", vg_name);
 171         if (!vg_remove_mdas(vg)) {
 172                 log_error("Removal of existing metadata for %s failed.",
 173                           vg_name);
 174                 log_error("Use pvcreate and vgcfgrestore to repair "
 175                           "from archived metadata.");
 176                 return ECMD_FAILED;
 177         }
 178
 179         /* FIXME Cache the label format change so we don't have to skip this */
 180         if (test_mode()) {
 181                 log_verbose("Test mode: Skipping metadata writing for VG %s in"
 182                             " format %s", vg_name, cmd->fmt->name);
 183                 return ECMD_PROCESSED;
 184         }
 185
 186         log_verbose("Writing metadata for VG %s using format %s", vg_name,
 187                     cmd->fmt->name);
 188         if (!backup_restore_vg(cmd, vg)) {
 189                 log_error("Conversion failed for volume group %s.", vg_name);
 190                 log_error("Use pvcreate and vgcfgrestore to repair from "
 191                           "archived metadata.");
 192                 return ECMD_FAILED;
 193         }
 194         log_print("Volume group %s successfully converted", vg_name);
 195
 196         backup(vg);
 197
 198         return ECMD_PROCESSED;
 199 }
 200
 201 int vgconvert(struct cmd_context *cmd, int argc, char **argv)
 202 {
 203         if (!argc) {
 204                 log_error("Please enter volume group(s)");
 205                 return EINVALID_CMD_LINE;
 206         }
 207
 208         if (arg_int_value(cmd, labelsector_ARG, 0) >= LABEL_SCAN_SECTORS) {
 209                 log_error("labelsector must be less than %lu",
 210                           LABEL_SCAN_SECTORS);
 211                 return EINVALID_CMD_LINE;
 212         }
 213
 214         if (arg_count(cmd, metadatacopies_ARG)) {
 215                 log_error("Invalid option --metadatacopies, "
 216                           "use --pvmetadatacopies instead.");
 217                 return EINVALID_CMD_LINE;
 218         }
 219         if (!(cmd->fmt->features & FMT_MDAS) &&
 220             (arg_count(cmd, pvmetadatacopies_ARG) ||
 221              arg_count(cmd, metadatasize_ARG))) {
 222                 log_error("Metadata parameters only apply to text format");
 223                 return EINVALID_CMD_LINE;
 224         }
 225
 226         if (arg_count(cmd, pvmetadatacopies_ARG) &&
 227             arg_int_value(cmd, pvmetadatacopies_ARG, -1) > 2) {
 228                 log_error("Metadatacopies may only be 0, 1 or 2");
 229                 return EINVALID_CMD_LINE;
 230         }
 231
 232         return process_each_vg(cmd, argc, argv, READ_FOR_UPDATE, NULL,
 233                                &vgconvert_single);
 234 }