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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 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;
struct pv_list *pvl;
int active;
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, 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,
LCK_VG_WRITE | LCK_NONBLOCK,
CLUSTERED | EXPORTED_VG | LVM_WRITE,
CORRECT_INCONSISTENT | FAIL_INCONSISTENT))) {
unlock_vg(cmd, vg_name_to);
return ECMD_FAILED;
}
if ((active = lvs_in_vg_activated(vg_from))) {
log_error("Logical volumes in \"%s\" must be inactive",
vg_name_from);
goto error;
}
/* Check compatibility */
if (vg_to->extent_size != vg_from->extent_size) {
log_error("Extent sizes differ: %d (%s) and %d (%s)",
vg_to->extent_size, vg_to->name,
vg_from->extent_size, vg_from->name);
goto error;
}
if (vg_to->max_pv &&
(vg_to->max_pv < vg_to->pv_count + vg_from->pv_count)) {
log_error("Maximum number of physical volumes (%d) exceeded "
" for \"%s\" and \"%s\"", vg_to->max_pv, vg_to->name,
vg_from->name);
goto error;
}
if (vg_to->max_lv &&
(vg_to->max_lv < vg_to->lv_count + vg_from->lv_count)) {
log_error("Maximum number of logical volumes (%d) exceeded "
" for \"%s\" and \"%s\"", vg_to->max_lv, vg_to->name,
vg_from->name);
goto error;
}
/* Check no conflicts with LV names */
list_iterate_items(lvl1, &vg_to->lvs) {
char *name1 = lvl1->lv->name;
list_iterate_items(lvl2, &vg_from->lvs) {
char *name2 = lvl2->lv->name;
if (!strcmp(name1, name2)) {
log_error("Duplicate logical volume "
"name \"%s\" "
"in \"%s\" and \"%s\"",
name1, vg_to->name, vg_from->name);
goto error;
}
}
}
/* Check no PVs are constructed from either VG */
list_iterate_items(pvl, &vg_to->pvs) {
if (pv_uses_vg(pvl->pv, vg_from)) {
log_error("Physical volume %s might be constructed "
"from same volume group %s.",
dev_name(pvl->pv->dev), vg_from->name);
goto error;
}
}
list_iterate_items(pvl, &vg_from->pvs) {
if (pv_uses_vg(pvl->pv, vg_to)) {
log_error("Physical volume %s might be constructed "
"from same volume group %s.",
dev_name(pvl->pv->dev), vg_to->name);
goto error;
}
}
/* FIXME List arg: vg_show_with_pv_and_lv(vg_to); */
if (!archive(vg_from) || !archive(vg_to))
goto error;
/* Merge volume groups */
while (!list_empty(&vg_from->pvs)) {
struct list *pvh = vg_from->pvs.n;
struct physical_volume *pv;
list_del(pvh);
list_add(&vg_to->pvs, pvh);
pv = 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 */
list_iterate_items(lvl1, &vg_to->lvs) {
union lvid *lvid1 = &lvl1->lv->lvid;
char uuid[64] __attribute((aligned(8)));
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 error;
}
if (!id_write_format(&lvid2->id[1], uuid,
sizeof(uuid))) {
stack;
goto error;
}
log_verbose("Changed LVID for %s to %s",
lvl2->lv->name, uuid);
}
}
}
while (!list_empty(&vg_from->lvs)) {
struct list *lvh = vg_from->lvs.n;
list_del(lvh);
list_add(&vg_to->lvs, lvh);
}
while (!list_empty(&vg_from->fid->metadata_areas)) {
struct list *mdah = vg_from->fid->metadata_areas.n;
list_del(mdah);
list_add(&vg_to->fid->metadata_areas, mdah);
}
vg_to->lv_count += vg_from->lv_count;
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 error;
}
/* FIXME Remove /dev/vgfrom */
backup(vg_to);
unlock_vg(cmd, vg_name_from);
unlock_vg(cmd, vg_name_to);
log_print("Volume group \"%s\" successfully merged into \"%s\"",
vg_from->name, vg_to->name);
return ECMD_PROCESSED;
error:
unlock_vg(cmd, vg_name_from);
unlock_vg(cmd, vg_name_to);
return ECMD_FAILED;
}
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;
}
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