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lvm2/tools/vgmerge.c
2009-05-21 03:04:52 +00:00

149 lines
3.9 KiB
C

/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tools.h"
static int _vgmerge_single(struct cmd_context *cmd, const char *vg_name_to,
const char *vg_name_from)
{
struct volume_group *vg_to, *vg_from;
struct lv_list *lvl1, *lvl2;
int r = ECMD_FAILED;
if (!strcmp(vg_name_to, vg_name_from)) {
log_error("Duplicate volume group name \"%s\"", vg_name_from);
return ECMD_FAILED;
}
log_verbose("Checking for volume group \"%s\"", vg_name_to);
if (!(vg_to = vg_lock_and_read(cmd, vg_name_to, NULL, LCK_VG_WRITE,
CLUSTERED | EXPORTED_VG | LVM_WRITE,
CORRECT_INCONSISTENT | FAIL_INCONSISTENT)))
return ECMD_FAILED;
log_verbose("Checking for volume group \"%s\"", vg_name_from);
if (!(vg_from = vg_lock_and_read(cmd, vg_name_from, NULL,
LCK_VG_WRITE,
CLUSTERED | EXPORTED_VG | LVM_WRITE,
CORRECT_INCONSISTENT | FAIL_INCONSISTENT))) {
unlock_and_release_vg(cmd, vg_to, vg_name_to);
return ECMD_FAILED;
}
if (!vgs_are_compatible(cmd, vg_from, vg_to))
goto_bad;
/* FIXME List arg: vg_show_with_pv_and_lv(vg_to); */
if (!archive(vg_from) || !archive(vg_to))
goto_bad;
drop_cached_metadata(vg_from);
/* Merge volume groups */
while (!dm_list_empty(&vg_from->pvs)) {
struct dm_list *pvh = vg_from->pvs.n;
struct physical_volume *pv;
dm_list_move(&vg_to->pvs, pvh);
pv = dm_list_item(pvh, struct pv_list)->pv;
pv->vg_name = dm_pool_strdup(cmd->mem, vg_to->name);
}
vg_to->pv_count += vg_from->pv_count;
/* Fix up LVIDs */
dm_list_iterate_items(lvl1, &vg_to->lvs) {
union lvid *lvid1 = &lvl1->lv->lvid;
char uuid[64] __attribute((aligned(8)));
dm_list_iterate_items(lvl2, &vg_from->lvs) {
union lvid *lvid2 = &lvl2->lv->lvid;
if (id_equal(&lvid1->id[1], &lvid2->id[1])) {
if (!id_create(&lvid2->id[1])) {
log_error("Failed to generate new "
"random LVID for %s",
lvl2->lv->name);
goto bad;
}
if (!id_write_format(&lvid2->id[1], uuid,
sizeof(uuid)))
goto_bad;
log_verbose("Changed LVID for %s to %s",
lvl2->lv->name, uuid);
}
}
}
while (!dm_list_empty(&vg_from->lvs)) {
struct dm_list *lvh = vg_from->lvs.n;
dm_list_move(&vg_to->lvs, lvh);
}
while (!dm_list_empty(&vg_from->fid->metadata_areas)) {
struct dm_list *mdah = vg_from->fid->metadata_areas.n;
dm_list_move(&vg_to->fid->metadata_areas, mdah);
}
vg_to->extent_count += vg_from->extent_count;
vg_to->free_count += vg_from->free_count;
/* store it on disks */
log_verbose("Writing out updated volume group");
if (!vg_write(vg_to) || !vg_commit(vg_to))
goto_bad;
/* FIXME Remove /dev/vgfrom */
backup(vg_to);
log_print("Volume group \"%s\" successfully merged into \"%s\"",
vg_from->name, vg_to->name);
r = ECMD_PROCESSED;
bad:
unlock_and_release_vg(cmd, vg_from, vg_name_from);
unlock_and_release_vg(cmd, vg_to, vg_name_to);
return r;
}
int vgmerge(struct cmd_context *cmd, int argc, char **argv)
{
char *vg_name_to, *vg_name_from;
int opt = 0;
int ret = 0, ret_max = 0;
if (argc < 2) {
log_error("Please enter 2 or more volume groups to merge");
return EINVALID_CMD_LINE;
}
vg_name_to = skip_dev_dir(cmd, argv[0], NULL);
argc--;
argv++;
for (; opt < argc; opt++) {
vg_name_from = skip_dev_dir(cmd, argv[opt], NULL);
ret = _vgmerge_single(cmd, vg_name_to, vg_name_from);
if (ret > ret_max)
ret_max = ret;
}
return ret_max;
}