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lvm2/tools/vgconvert.c

191 lines
5.4 KiB
C

/*
* Copyright (C) 2001 Sistina Software
*
* pvcreate is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* pvcreate is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LVM; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#include "tools.h"
static int vgconvert_single(struct cmd_context *cmd, const char *vg_name,
struct volume_group *vg, int consistent,
void *handle)
{
struct physical_volume *pv, *existing_pv;
uint64_t size = 0;
struct list mdas;
int pvmetadatacopies = 0;
uint64_t pvmetadatasize = 0;
uint64_t pe_end = 0, pe_start = 0;
struct list *pvh;
int change_made = 0;
if (!vg) {
log_error("Unable to find volume group \"%s\"", vg_name);
return ECMD_FAILED;
}
if (!consistent) {
unlock_vg(cmd, vg_name);
log_error("Volume group \"%s\" inconsistent", vg_name);
if (!(vg = recover_vg(cmd, vg_name, LCK_VG_WRITE)))
return ECMD_FAILED;
}
if (!(vg->status & LVM_WRITE)) {
log_error("Volume group \"%s\" is read-only", vg->name);
return ECMD_FAILED;
}
if (vg->status & EXPORTED_VG) {
log_error("Volume group \"%s\" is exported", vg_name);
return ECMD_FAILED;
}
if (vg->fid->fmt == cmd->fmt) {
log_error("Volume group \"%s\" already uses format %s",
vg_name, cmd->fmt->name);
return ECMD_FAILED;
}
if (cmd->fmt->features & FMT_MDAS) {
pvmetadatasize = arg_uint64_value(cmd, metadatasize_ARG,
UINT64_C(0)) * 2;
if (!pvmetadatasize)
pvmetadatasize =
find_config_int(cmd->cf->root,
"metadata/pvmetadatasize",
'/', DEFAULT_PVMETADATASIZE);
pvmetadatacopies = arg_int_value(cmd, metadatacopies_ARG, -1);
if (pvmetadatacopies < 0)
pvmetadatacopies =
find_config_int(cmd->cf->root,
"metadata/pvmetadatacopies",
'/', DEFAULT_PVMETADATACOPIES);
}
if (!archive(vg)) {
log_error("Archive of \"%s\" metadata failed.", vg_name);
return ECMD_FAILED;
}
list_iterate(pvh, &vg->pvs) {
existing_pv = list_item(pvh, struct pv_list)->pv;
pe_start = existing_pv->pe_start;
pe_end = existing_pv->pe_count * existing_pv->pe_size
+ pe_start - 1;
list_init(&mdas);
if (!(pv = pv_create(cmd->fmt, existing_pv->dev,
&existing_pv->id, size,
pe_start, existing_pv->pe_count,
existing_pv->pe_size, pvmetadatacopies,
pvmetadatasize, &mdas))) {
log_error("Failed to setup physical volume \"%s\"",
dev_name(existing_pv->dev));
if (change_made)
log_error("Use pvcreate and vgcfgrestore to "
"repair from archived metadata.");
return ECMD_FAILED;
}
/* Need to revert manually if it fails after this point */
change_made = 1;
log_verbose("Set up physical volume for \"%s\" with %" PRIu64
" available sectors", dev_name(pv->dev), pv->size);
/* Wipe existing label first */
if (!label_remove(pv->dev)) {
log_error("Failed to wipe existing label on %s",
dev_name(pv->dev));
log_error("Use pvcreate and vgcfgrestore to repair "
"from archived metadata.");
return ECMD_FAILED;
}
log_very_verbose("Writing physical volume data to disk \"%s\"",
dev_name(pv->dev));
if (!(pv_write(cmd, pv, &mdas,
arg_int64_value(cmd, labelsector_ARG,
DEFAULT_LABELSECTOR)))) {
log_error("Failed to write physical volume \"%s\"",
dev_name(pv->dev));
log_error("Use pvcreate and vgcfgrestore to repair "
"from archived metadata.");
return ECMD_FAILED;
}
log_verbose("Physical volume \"%s\" successfully created",
dev_name(pv->dev));
}
log_verbose("Deleting existing metadata for VG %s", vg_name);
if (!vg_remove(vg)) {
log_error("Removal of existing metadata for %s failed.",
vg_name);
log_error("Use pvcreate and vgcfgrestore to repair "
"from archived metadata.");
return ECMD_FAILED;
}
log_verbose("Writing metadata for VG %s using format %s", vg_name,
cmd->fmt->name);
if (!backup_restore_vg(cmd, vg)) {
log_error("Conversion failed for volume group %s.", vg_name);
log_error("Use pvcreate and vgcfgrestore to repair from "
"archived metadata.");
return ECMD_FAILED;
}
log_print("Volume group %s successfully converted", vg_name);
backup(vg);
return 0;
}
int vgconvert(struct cmd_context *cmd, int argc, char **argv)
{
if (!argc) {
log_error("Please enter volume group(s)");
return EINVALID_CMD_LINE;
}
if (arg_int_value(cmd, labelsector_ARG, 0) >= LABEL_SCAN_SECTORS) {
log_error("labelsector must be less than %lu",
LABEL_SCAN_SECTORS);
return EINVALID_CMD_LINE;
}
if (!(cmd->fmt->features & FMT_MDAS) &&
(arg_count(cmd, metadatacopies_ARG) ||
arg_count(cmd, metadatasize_ARG))) {
log_error("Metadata parameters only apply to text format");
return EINVALID_CMD_LINE;
}
if (arg_count(cmd, metadatacopies_ARG) &&
arg_int_value(cmd, metadatacopies_ARG, -1) > 2) {
log_error("Metadatacopies may only be 0, 1 or 2");
return EINVALID_CMD_LINE;
}
return process_each_vg(cmd, argc, argv, LCK_VG_WRITE, 0, NULL,
&vgconvert_single);
}