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Add vgsplit.
This commit is contained in:
Alasdair Kergon
parent
d4e5f63e96
commit
fbbe942c45
@ -52,7 +52,8 @@ SOURCES=\
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vgreduce.c \
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vgremove.c \
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vgrename.c \
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vgscan.c
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vgscan.c \
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vgsplit.c
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TARGETS=\
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.commands \
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@ -87,9 +87,9 @@ xx(lvcreate,
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"\t[--version]\n"
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"\tVolumeGroupName [PhysicalVolumePath...]\n\n",
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autobackup_ARG, chunksize_ARG, contiguous_ARG, extents_ARG,
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minor_ARG, name_ARG, permission_ARG, persistent_ARG, readahead_ARG,
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size_ARG, snapshot_ARG, stripes_ARG, stripesize_ARG, test_ARG, zero_ARG)
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autobackup_ARG, chunksize_ARG, contiguous_ARG, extents_ARG, minor_ARG,
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name_ARG, permission_ARG, persistent_ARG, readahead_ARG, size_ARG,
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snapshot_ARG, stripes_ARG, stripesize_ARG, test_ARG, zero_ARG)
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xx(lvdisplay,
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"Display information about a logical volume",
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@ -533,13 +533,14 @@ xx(vgsplit,
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"\t[-d|--debug] " "\n"
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"\t[-h|--help] " "\n"
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"\t[-l|--list]" "\n"
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"\t[-M|--metadatatype lvm1/text] " "\n"
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"\t[-t|--test] " "\n"
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"\t[-v|--verbose] " "\n"
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"\t[--version]" "\n"
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"\tExistingVolumeGroupName NewVolumeGroupName" "\n"
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"\tPhysicalVolumePath [PhysicalVolumePath...]\n",
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autobackup_ARG, list_ARG, test_ARG)
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autobackup_ARG, list_ARG, metadatatype_ARG, test_ARG)
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xx(version,
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"Display software and driver version information",
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@ -13,5 +13,4 @@ int pvdata(struct cmd_context *cmd, int argc, char **argv) unimplemented
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int pvmove(struct cmd_context *cmd, int argc, char **argv) unimplemented
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int pvresize(struct cmd_context *cmd, int argc, char **argv) unimplemented
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int vgmknodes(struct cmd_context *cmd, int argc, char **argv) unimplemented
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int vgsplit(struct cmd_context *cmd, int argc, char **argv) unimplemented
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289
tools/vgsplit.c
Normal file
289
tools/vgsplit.c
Normal file
@ -0,0 +1,289 @@
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/*
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* Copyright (C) 2001 Sistina Software
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*
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* LVM is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LVM is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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 LVM; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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*/
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#include "tools.h"
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static int _move_pv(struct volume_group *vg_from, struct volume_group *vg_to,
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char *pv_name)
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{
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struct pv_list *pvl;
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struct physical_volume *pv;
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if (!(pvl = find_pv_in_vg(vg_from, pv_name))) {
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log_error("Physical volume %s not in volume group %s",
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pv_name, vg_from->name);
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return 0;
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}
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list_del(&pvl->list);
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list_add(&vg_to->pvs, &pvl->list);
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vg_from->pv_count--;
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vg_to->pv_count++;
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pv = list_item(pvl, struct pv_list)->pv;
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vg_from->extent_count -= pv->pe_count;
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vg_to->extent_count += pv->pe_count;
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vg_from->free_count -= pv->pe_count - pv->pe_alloc_count;
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vg_to->free_count += pv->pe_count - pv->pe_alloc_count;
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return 1;
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}
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static int _pv_is_in_vg(struct volume_group *vg, struct physical_volume *pv)
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{
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struct list *pvh;
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list_iterate(pvh, &vg->pvs) {
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if (pv == list_item(pvh, struct pv_list)->pv)
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return 1;
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}
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return 0;
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}
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static int _move_lvs(struct volume_group *vg_from, struct volume_group *vg_to)
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{
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struct list *lvh, *lvht, *segh;
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struct logical_volume *lv;
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struct stripe_segment *seg;
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struct physical_volume *pv;
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struct volume_group *vg_with;
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int s;
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list_iterate_safe(lvh, lvht, &vg_from->lvs) {
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lv = list_item(lvh, struct lv_list)->lv;
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/* Ensure all the PVs used by this LV remain in the same */
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/* VG as each other */
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vg_with = NULL;
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list_iterate(segh, &lv->segments) {
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seg = list_item(segh, struct stripe_segment);
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for (s = 0; s < seg->stripes; s++) {
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pv = seg->area[s].pv;
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if (vg_with) {
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if (!_pv_is_in_vg(vg_with, pv)) {
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log_error("Logical Volume %s "
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"split between "
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"Volume Groups",
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lv->name);
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return 0;
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}
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continue;
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}
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if (_pv_is_in_vg(vg_from, pv)) {
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vg_with = vg_from;
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continue;
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}
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if (_pv_is_in_vg(vg_to, pv)) {
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vg_with = vg_to;
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continue;
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}
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log_error("Physical Volume %s not found",
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dev_name(pv->dev));
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return 0;
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}
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}
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if (vg_with == vg_from)
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continue;
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/* Move this LV */
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list_del(lvh);
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list_add(&vg_to->lvs, lvh);
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vg_from->lv_count--;
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vg_to->lv_count++;
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}
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return 1;
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}
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static int _lv_is_in_vg(struct volume_group *vg, struct logical_volume *lv)
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{
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struct list *lvh;
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list_iterate(lvh, &vg->lvs) {
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if (lv == list_item(lvh, struct lv_list)->lv)
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return 1;
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}
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return 0;
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}
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static int _move_snapshots(struct volume_group *vg_from,
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struct volume_group *vg_to)
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{
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struct list *slh, *slth;
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struct snapshot *snap;
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int cow_from, origin_from;
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list_iterate_safe(slh, slth, &vg_from->snapshots) {
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snap = list_item(slh, struct snapshot_list)->snapshot;
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cow_from = _lv_is_in_vg(vg_from, snap->cow);
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origin_from = _lv_is_in_vg(vg_from, snap->origin);
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if (cow_from && origin_from)
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return 1;
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if ((!cow_from && origin_from) || (cow_from && !origin_from)) {
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log_error("Snapshot %s split", snap->cow->name);
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return 0;
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}
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vg_from->snapshot_count--;
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vg_to->snapshot_count++;
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list_del(slh);
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list_add(&vg_to->snapshots, slh);
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}
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return 1;
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}
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int vgsplit(struct cmd_context *cmd, int argc, char **argv)
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{
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char *vg_name_from, *vg_name_to;
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struct volume_group *vg_to, *vg_from;
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int opt;
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int active;
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if (argc < 3) {
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log_error("Existing VG, new VG and physical volumes required.");
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return EINVALID_CMD_LINE;
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}
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vg_name_from = argv[0];
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vg_name_to = argv[1];
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argc -= 2;
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argv += 2;
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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_from);
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if (!lock_vol(cmd, vg_name_from, LCK_VG_WRITE)) {
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log_error("Can't get lock for %s", vg_name_from);
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return ECMD_FAILED;
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}
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if (!(vg_from = vg_read(cmd, vg_name_from))) {
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log_error("Volume group \"%s\" doesn't exist", vg_name_from);
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unlock_vg(cmd, vg_name_from);
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return ECMD_FAILED;
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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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unlock_vg(cmd, vg_name_from);
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return ECMD_FAILED;
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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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unlock_vg(cmd, 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 | LCK_NONBLOCK)) {
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log_error("Can't get lock for %s", vg_name_to);
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unlock_vg(cmd, vg_name_from);
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return ECMD_FAILED;
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}
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if ((vg_to = vg_read(cmd, vg_name_to))) {
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/* FIXME Remove this restriction */
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log_error("Volume group \"%s\" already exists", vg_name_to);
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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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/* FIXME Remove this restriction */
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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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/* Create new VG structure */
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if (!(vg_to = vg_create(cmd, vg_name_to, vg_from->extent_size,
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vg_from->max_pv, vg_from->max_lv, 0, NULL)))
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goto error;
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/* Archive vg_from before changing it */
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if (!archive(vg_from))
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goto error;
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/* Move PVs across to new structure */
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for (opt = 0; opt < argc; opt++) {
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if (!_move_pv(vg_from, vg_to, argv[opt]))
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goto error;
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}
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/* Move required LVs across, checking consistency */
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if (!(_move_lvs(vg_from, vg_to)))
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goto error;
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/* Move required snapshots across */
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if (!(_move_snapshots(vg_from, vg_to)))
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goto error;
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/* store it on disks */
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log_verbose("Writing out updated volume groups");
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/* Write out new VG as EXPORTED */
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vg_to->status |= EXPORTED_VG;
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if (!archive(vg_to))
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goto error;
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if (!vg_write(vg_to))
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goto error;
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backup(vg_to);
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/* Write out updated old VG */
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if (!vg_write(vg_from))
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goto error;
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backup(vg_from);
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/* Remove EXPORTED flag from new VG */
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vg_to->status &= ~EXPORTED_VG;
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if (!vg_write(vg_to))
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goto error;
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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 split from \"%s\"",
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vg_to->name, vg_from->name);
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return 0;
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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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