mirror of
git://sourceware.org/git/lvm2.git
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257 lines
6.5 KiB
C
257 lines
6.5 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "tools.h"
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static int _vgmerge_single(struct cmd_context *cmd, const char *vg_name_to,
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const char *vg_name_from)
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{
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struct volume_group *vg_to, *vg_from;
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struct lv_list *lvl1, *lvl2;
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struct pv_list *pvl;
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int active;
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int consistent = 1;
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if (!strcmp(vg_name_to, vg_name_from)) {
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log_error("Duplicate volume group name \"%s\"", vg_name_from);
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return ECMD_FAILED;
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}
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log_verbose("Checking for volume group \"%s\"", vg_name_to);
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if (!lock_vol(cmd, vg_name_to, LCK_VG_WRITE)) {
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log_error("Can't get lock for %s", vg_name_to);
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return ECMD_FAILED;
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}
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if (!(vg_to = vg_read(cmd, vg_name_to, NULL, &consistent)) || !consistent) {
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log_error("Volume group \"%s\" doesn't exist", vg_name_to);
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unlock_vg(cmd, vg_name_to);
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return ECMD_FAILED;
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}
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if (vg_to->status & EXPORTED_VG) {
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log_error("Volume group \"%s\" is exported", vg_to->name);
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unlock_vg(cmd, vg_name_to);
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return ECMD_FAILED;
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}
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if (!(vg_to->status & LVM_WRITE)) {
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log_error("Volume group \"%s\" is read-only", vg_to->name);
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unlock_vg(cmd, vg_name_to);
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return ECMD_FAILED;
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}
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log_verbose("Checking for volume group \"%s\"", vg_name_from);
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if (!lock_vol(cmd, vg_name_from, LCK_VG_WRITE | LCK_NONBLOCK)) {
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log_error("Can't get lock for %s", vg_name_from);
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unlock_vg(cmd, vg_name_to);
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return ECMD_FAILED;
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}
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consistent = 1;
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if (!(vg_from = vg_read(cmd, vg_name_from, NULL, &consistent)) || !consistent) {
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log_error("Volume group \"%s\" doesn't exist", vg_name_from);
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goto error;
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}
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if (vg_from->status & EXPORTED_VG) {
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log_error("Volume group \"%s\" is exported", vg_from->name);
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goto error;
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}
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if (!(vg_from->status & LVM_WRITE)) {
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log_error("Volume group \"%s\" is read-only", vg_from->name);
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goto error;
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}
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if ((active = lvs_in_vg_activated(vg_from))) {
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log_error("Logical volumes in \"%s\" must be inactive",
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vg_name_from);
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goto error;
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}
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/* Check compatibility */
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if (vg_to->extent_size != vg_from->extent_size) {
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log_error("Extent sizes differ: %d (%s) and %d (%s)",
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vg_to->extent_size, vg_to->name,
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vg_from->extent_size, vg_from->name);
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goto error;
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}
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if (vg_to->max_pv &&
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(vg_to->max_pv < vg_to->pv_count + vg_from->pv_count)) {
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log_error("Maximum number of physical volumes (%d) exceeded "
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" for \"%s\" and \"%s\"", vg_to->max_pv, vg_to->name,
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vg_from->name);
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goto error;
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}
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if (vg_to->max_lv &&
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(vg_to->max_lv < vg_to->lv_count + vg_from->lv_count)) {
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log_error("Maximum number of logical volumes (%d) exceeded "
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" for \"%s\" and \"%s\"", vg_to->max_lv, vg_to->name,
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vg_from->name);
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goto error;
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}
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/* Check no conflicts with LV names */
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list_iterate_items(lvl1, &vg_to->lvs) {
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char *name1 = lvl1->lv->name;
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list_iterate_items(lvl2, &vg_from->lvs) {
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char *name2 = lvl2->lv->name;
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if (!strcmp(name1, name2)) {
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log_error("Duplicate logical volume "
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"name \"%s\" "
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"in \"%s\" and \"%s\"",
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name1, vg_to->name, vg_from->name);
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goto error;
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}
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}
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}
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/* Check no PVs are constructed from either VG */
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list_iterate_items(pvl, &vg_to->pvs) {
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if (pv_uses_vg(pvl->pv, vg_from)) {
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log_error("Physical volume %s might be constructed "
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"from same volume group %s.",
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dev_name(pvl->pv->dev), vg_from->name);
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goto error;
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}
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}
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list_iterate_items(pvl, &vg_from->pvs) {
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if (pv_uses_vg(pvl->pv, vg_to)) {
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log_error("Physical volume %s might be constructed "
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"from same volume group %s.",
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dev_name(pvl->pv->dev), vg_to->name);
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goto error;
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}
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}
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/* FIXME List arg: vg_show_with_pv_and_lv(vg_to); */
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if (!archive(vg_from) || !archive(vg_to))
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goto error;
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/* Merge volume groups */
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while (!list_empty(&vg_from->pvs)) {
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struct list *pvh = vg_from->pvs.n;
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struct physical_volume *pv;
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list_del(pvh);
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list_add(&vg_to->pvs, pvh);
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pv = list_item(pvh, struct pv_list)->pv;
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pv->vg_name = dm_pool_strdup(cmd->mem, vg_to->name);
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}
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vg_to->pv_count += vg_from->pv_count;
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/* Fix up LVIDs */
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list_iterate_items(lvl1, &vg_to->lvs) {
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union lvid *lvid1 = &lvl1->lv->lvid;
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char uuid[64];
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list_iterate_items(lvl2, &vg_from->lvs) {
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union lvid *lvid2 = &lvl2->lv->lvid;
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if (id_equal(&lvid1->id[1], &lvid2->id[1])) {
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if (!id_create(&lvid2->id[1])) {
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log_error("Failed to generate new "
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"random LVID for %s",
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lvl2->lv->name);
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goto error;
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}
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if (!id_write_format(&lvid2->id[1], uuid,
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sizeof(uuid))) {
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stack;
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goto error;
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}
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log_verbose("Changed LVID for %s to %s",
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lvl2->lv->name, uuid);
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}
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}
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}
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while (!list_empty(&vg_from->lvs)) {
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struct list *lvh = vg_from->lvs.n;
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list_del(lvh);
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list_add(&vg_to->lvs, lvh);
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}
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while (!list_empty(&vg_from->fid->metadata_areas)) {
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struct list *mdah = vg_from->fid->metadata_areas.n;
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list_del(mdah);
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list_add(&vg_to->fid->metadata_areas, mdah);
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}
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vg_to->lv_count += vg_from->lv_count;
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vg_to->extent_count += vg_from->extent_count;
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vg_to->free_count += vg_from->free_count;
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/* store it on disks */
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log_verbose("Writing out updated volume group");
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if (!vg_write(vg_to) || !vg_commit(vg_to)) {
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goto error;
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}
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/* FIXME Remove /dev/vgfrom */
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backup(vg_to);
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unlock_vg(cmd, vg_name_from);
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unlock_vg(cmd, vg_name_to);
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log_print("Volume group \"%s\" successfully merged into \"%s\"",
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vg_from->name, vg_to->name);
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return ECMD_PROCESSED;
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error:
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unlock_vg(cmd, vg_name_from);
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unlock_vg(cmd, vg_name_to);
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return ECMD_FAILED;
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}
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int vgmerge(struct cmd_context *cmd, int argc, char **argv)
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{
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char *vg_name_to, *vg_name_from;
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int opt = 0;
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int ret = 0, ret_max = 0;
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if (argc < 2) {
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log_error("Please enter 2 or more volume groups to merge");
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return EINVALID_CMD_LINE;
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}
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vg_name_to = skip_dev_dir(cmd, argv[0]);
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argc--;
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argv++;
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for (; opt < argc; opt++) {
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vg_name_from = skip_dev_dir(cmd, argv[opt]);
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ret = _vgmerge_single(cmd, vg_name_to, vg_name_from);
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if (ret > ret_max)
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ret_max = ret;
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}
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return ret_max;
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}
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