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/*
* Copyright (C) 2001 Sistina Software
*
* LVM 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.
*
* LVM 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"
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 list *lvh1, *lvh2;
int active;
int consistent = 1;
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 (!lock_vol(cmd, vg_name_to, LCK_VG_WRITE)) {
log_error("Can't get lock for %s", vg_name_to);
return ECMD_FAILED;
}
if (!(vg_to = vg_read(cmd, vg_name_to, &consistent)) || !consistent) {
log_error("Volume group \"%s\" doesn't exist", vg_name_to);
unlock_vg(cmd, vg_name_to);
return ECMD_FAILED;
}
if (vg_to->status & EXPORTED_VG) {
log_error("Volume group \"%s\" is exported", vg_to->name);
unlock_vg(cmd, vg_name_to);
return ECMD_FAILED;
}
if (!(vg_to->status & LVM_WRITE)) {
log_error("Volume group \"%s\" is read-only", vg_to->name);
unlock_vg(cmd, vg_name_to);
return ECMD_FAILED;
}
log_verbose("Checking for volume group \"%s\"", vg_name_from);
if (!lock_vol(cmd, vg_name_from, LCK_VG_WRITE | LCK_NONBLOCK)) {
log_error("Can't get lock for %s", vg_name_from);
unlock_vg(cmd, vg_name_to);
return ECMD_FAILED;
}
consistent = 1;
if (!(vg_from = vg_read(cmd, vg_name_from, &consistent)) || !consistent) {
log_error("Volume group \"%s\" doesn't exist", vg_name_from);
goto error;
}
if (vg_from->status & EXPORTED_VG) {
log_error("Volume group \"%s\" is exported", vg_from->name);
goto error;
}
if (!(vg_from->status & LVM_WRITE)) {
log_error("Volume group \"%s\" is read-only", vg_from->name);
goto error;
}
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->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->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(lvh1, &vg_to->lvs) {
list_iterate(lvh2, &vg_from->lvs) {
char *name1 = list_item(lvh1,
struct lv_list)->lv->name;
char *name2 = list_item(lvh2,
struct lv_list)->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;
}
}
}
/* 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 = pool_strdup(cmd->mem, vg_to->name);
}
vg_to->pv_count += vg_from->pv_count;
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)) {
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 0;
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;
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 = argv[0];
argc--;
argv++;
for (; opt < argc; opt++) {
ret = vgmerge_single(cmd, vg_name_to, argv[opt]);
if (ret > ret_max)
ret_max = ret;
}
return ret_max;
}
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