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git://sourceware.org/git/lvm2.git
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4790715cd3
Add vgid to struct physical_volume and pass with vg_name to some functions.
527 lines
13 KiB
C
527 lines
13 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2005 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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#include "lv_alloc.h"
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static int _remove_pv(struct volume_group *vg, struct pv_list *pvl)
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{
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char uuid[64];
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if (vg->pv_count == 1) {
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log_error("Volume Groups must always contain at least one PV");
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return 0;
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}
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if (!id_write_format(&pvl->pv->id, uuid, sizeof(uuid))) {
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stack;
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return 0;
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}
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log_verbose("Removing PV with UUID %s from VG %s", uuid, vg->name);
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if (pvl->pv->pe_alloc_count) {
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log_error("LVs still present on PV with UUID %s: Can't remove "
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"from VG %s", uuid, vg->name);
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return 0;
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}
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vg->free_count -= pvl->pv->pe_count;
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vg->extent_count -= pvl->pv->pe_count;
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vg->pv_count--;
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list_del(&pvl->list);
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return 1;
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}
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static int _remove_lv(struct cmd_context *cmd, struct logical_volume *lv,
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int *list_unsafe, struct list *lvs_changed)
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{
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struct lv_segment *snap_seg, *mirror_seg;
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struct list *snh, *snht;
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struct logical_volume *cow;
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struct lv_list *lvl;
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uint32_t extents;
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struct lvinfo info;
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int first = 1;
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log_verbose("%s/%s has missing extents: removing (including "
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"dependencies)", lv->vg->name, lv->name);
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/* FIXME Cope properly with stacked devices & snapshots. */
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/* If snapshot device is missing, deactivate origin. */
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if (lv_is_cow(lv) && (snap_seg = find_cow(lv))) {
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log_verbose("Deactivating (if active) logical volume %s "
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"(origin of %s)", snap_seg->origin->name, lv->name);
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if (!test_mode() && !deactivate_lv(cmd, snap_seg->origin)) {
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log_error("Failed to deactivate LV %s",
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snap_seg->origin->name);
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return 0;
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}
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/* Use the origin LV */
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lv = snap_seg->origin;
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}
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/* Remove snapshot dependencies */
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list_iterate_safe(snh, snht, &lv->snapshot_segs) {
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snap_seg = list_struct_base(snh, struct lv_segment,
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origin_list);
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cow = snap_seg->cow;
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if (first && !test_mode() &&
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!deactivate_lv(cmd, snap_seg->origin)) {
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log_error("Failed to deactivate LV %s",
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snap_seg->origin->name);
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return 0;
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}
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*list_unsafe = 1; /* May remove caller's lvht! */
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if (!vg_remove_snapshot(cow)) {
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stack;
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return 0;
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}
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log_verbose("Removing LV %s from VG %s", cow->name,
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lv->vg->name);
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if (!lv_remove(cow)) {
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stack;
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return 0;
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}
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first = 0;
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}
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/*
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* If LV is active, replace it with error segment
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* and add to list of LVs to be removed later.
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* Doesn't apply to snapshots/origins yet - they're already deactivated.
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*/
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if (lv_info(cmd, lv, &info, 0) && info.exists) {
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extents = lv->le_count;
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mirror_seg = first_seg(lv)->mirror_seg;
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if (!lv_empty(lv)) {
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stack;
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return 0;
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}
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if (!lv_add_virtual_segment(lv, 0, extents,
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get_segtype_from_string(cmd,
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"error"))) {
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stack;
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return 0;
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}
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if (mirror_seg) {
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first_seg(lv)->status |= MIRROR_IMAGE;
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first_seg(lv)->mirror_seg = mirror_seg;
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}
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if (!(lvl = dm_pool_alloc(cmd->mem, sizeof(*lvl)))) {
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log_error("lv_list alloc failed");
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return 0;
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}
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lvl->lv = lv;
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list_add(lvs_changed, &lvl->list);
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} else {
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/* Remove LV immediately. */
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log_verbose("Removing LV %s from VG %s", lv->name, lv->vg->name);
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if (!lv_remove(lv)) {
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stack;
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return 0;
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}
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}
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return 1;
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}
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static int _make_vg_consistent(struct cmd_context *cmd, struct volume_group *vg)
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{
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struct list *pvh, *pvht;
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struct list *lvh, *lvht;
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struct pv_list *pvl;
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struct lv_list *lvl, *lvl2, *lvlt;
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struct logical_volume *lv;
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struct physical_volume *pv;
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struct lv_segment *seg, *mirrored_seg;
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struct lv_segment_area area;
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unsigned int s;
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uint32_t mimages;
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int list_unsafe, only_mirror_images_found;
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LIST_INIT(lvs_changed);
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only_mirror_images_found = 1;
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/* Deactivate & remove necessary LVs */
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restart_loop:
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list_unsafe = 0; /* Set if we delete a different list-member */
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list_iterate_safe(lvh, lvht, &vg->lvs) {
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lv = list_item(lvh, struct lv_list)->lv;
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/* Are any segments of this LV on missing PVs? */
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list_iterate_items(seg, &lv->segments) {
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for (s = 0; s < seg->area_count; s++) {
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if (seg_type(seg, s) != AREA_PV)
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continue;
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/* FIXME Also check for segs on deleted LVs */
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pv = seg_pv(seg, s);
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if (!pv || !pv->dev) {
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if (arg_count(cmd, mirrorsonly_ARG) &&
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!(lv->status & MIRROR_IMAGE)) {
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log_error("Non-mirror-image LV %s found: can't remove.", lv->name);
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only_mirror_images_found = 0;
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continue;
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}
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if (!_remove_lv(cmd, lv, &list_unsafe, &lvs_changed)) {
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stack;
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return 0;
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}
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if (list_unsafe)
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goto restart_loop;
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}
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}
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}
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}
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if (!only_mirror_images_found) {
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log_error("Aborting because --mirrorsonly was specified.");
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return 0;
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}
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/* Remove missing PVs */
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list_iterate_safe(pvh, pvht, &vg->pvs) {
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pvl = list_item(pvh, struct pv_list);
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if (pvl->pv->dev)
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continue;
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if (!_remove_pv(vg, pvl)) {
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stack;
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return 0;
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}
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}
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/* VG is now consistent */
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vg->status &= ~PARTIAL_VG;
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vg->status |= LVM_WRITE;
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init_partial(0);
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/* FIXME Recovery. For now people must clean up by hand. */
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if (!list_empty(&lvs_changed)) {
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if (!vg_write(vg)) {
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log_error("Failed to write out a consistent VG for %s",
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vg->name);
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return 0;
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}
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if (!test_mode()) {
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/* Suspend lvs_changed */
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init_partial(1);
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if (!suspend_lvs(cmd, &lvs_changed)) {
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stack;
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init_partial(0);
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vg_revert(vg);
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return 0;
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}
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init_partial(0);
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}
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if (!vg_commit(vg)) {
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log_error("Failed to commit consistent VG for %s",
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vg->name);
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vg_revert(vg);
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return 0;
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}
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if (!test_mode()) {
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if (!resume_lvs(cmd, &lvs_changed)) {
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log_error("Failed to resume LVs using error segments.");
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return 0;
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}
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}
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/* Remove lost mirror images from mirrors */
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list_iterate_items(lvl, &vg->lvs) {
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mirrored_seg = first_seg(lvl->lv);
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if (!seg_is_mirrored(mirrored_seg))
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continue;
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mimages = mirrored_seg->area_count;
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for (s = 0; s < mirrored_seg->area_count; s++) {
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list_iterate_items_safe(lvl2, lvlt, &lvs_changed) {
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if (seg_type(mirrored_seg, s) != AREA_LV ||
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lvl2->lv != seg_lv(mirrored_seg, s))
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continue;
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list_del(&lvl2->list);
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area = mirrored_seg->areas[mimages - 1];
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mirrored_seg->areas[mimages - 1] = mirrored_seg->areas[s];
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mirrored_seg->areas[s] = area;
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mimages--; /* FIXME Assumes uniqueness */
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}
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}
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if (mimages != mirrored_seg->area_count) {
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if (!remove_mirror_images(mirrored_seg, mimages, NULL, 0)) {
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stack;
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return 0;
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}
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if (!vg_write(vg)) {
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log_error("Failed to write out updated "
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"VG for %s", vg->name);
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return 0;
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}
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if (!vg_commit(vg)) {
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log_error("Failed to commit updated VG "
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"for %s", vg->name);
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vg_revert(vg);
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return 0;
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}
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}
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}
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/* Deactivate error LVs */
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if (!test_mode()) {
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list_iterate_items(lvl, &lvs_changed) {
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log_verbose("Deactivating (if active) logical volume %s",
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lvl->lv->name);
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if (!deactivate_lv(cmd, lvl->lv)) {
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log_error("Failed to deactivate LV %s",
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lvl->lv->name);
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return 0;
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}
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}
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}
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/* Remove remaining LVs */
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list_iterate_items(lvl, &lvs_changed) {
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log_verbose("Removing LV %s from VG %s", lvl->lv->name,
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lvl->lv->vg->name);
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if (!lv_remove(lvl->lv)) {
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stack;
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return 0;
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}
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}
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}
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return 1;
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}
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/* Or take pv_name instead? */
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static int _vgreduce_single(struct cmd_context *cmd, struct volume_group *vg,
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struct physical_volume *pv, void *handle)
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{
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struct pv_list *pvl;
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const char *name = dev_name(pv->dev);
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if (pv->pe_alloc_count) {
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log_error("Physical volume \"%s\" still in use", name);
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return ECMD_FAILED;
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}
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if (vg->pv_count == 1) {
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log_error("Can't remove final physical volume \"%s\" from "
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"volume group \"%s\"", name, vg->name);
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return ECMD_FAILED;
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}
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pvl = find_pv_in_vg(vg, name);
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if (!archive(vg))
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return ECMD_FAILED;
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log_verbose("Removing \"%s\" from volume group \"%s\"", name, vg->name);
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if (pvl)
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list_del(&pvl->list);
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pv->vg_name = ORPHAN;
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pv->status = ALLOCATABLE_PV;
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if (!dev_get_size(pv->dev, &pv->size)) {
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log_error("%s: Couldn't get size.", dev_name(pv->dev));
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return ECMD_FAILED;
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}
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vg->pv_count--;
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vg->free_count -= pv->pe_count - pv->pe_alloc_count;
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vg->extent_count -= pv->pe_count;
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if (!vg_write(vg) || !vg_commit(vg)) {
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log_error("Removal of physical volume \"%s\" from "
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"\"%s\" failed", name, vg->name);
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return ECMD_FAILED;
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}
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if (!pv_write(cmd, pv, NULL, INT64_C(-1))) {
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log_error("Failed to clear metadata from physical "
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"volume \"%s\" "
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"after removal from \"%s\"", name, vg->name);
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return ECMD_FAILED;
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}
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backup(vg);
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log_print("Removed \"%s\" from volume group \"%s\"", name, vg->name);
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return ECMD_PROCESSED;
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}
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int vgreduce(struct cmd_context *cmd, int argc, char **argv)
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{
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struct volume_group *vg;
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char *vg_name;
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int ret = 1;
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int consistent = 1;
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if (!argc & !arg_count(cmd, removemissing_ARG)) {
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log_error("Please give volume group name and "
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"physical volume paths");
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return EINVALID_CMD_LINE;
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}
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if (!argc & arg_count(cmd, removemissing_ARG)) {
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log_error("Please give volume group name");
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return EINVALID_CMD_LINE;
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}
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if (arg_count(cmd, mirrorsonly_ARG) &&
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!arg_count(cmd, removemissing_ARG)) {
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log_error("--mirrorsonly requires --removemissing");
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return EINVALID_CMD_LINE;
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}
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if (argc == 1 && !arg_count(cmd, all_ARG)
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&& !arg_count(cmd, removemissing_ARG)) {
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log_error("Please enter physical volume paths or option -a");
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return EINVALID_CMD_LINE;
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}
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if (argc > 1 && arg_count(cmd, all_ARG)) {
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log_error("Option -a and physical volume paths mutually "
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"exclusive");
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return EINVALID_CMD_LINE;
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}
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if (argc > 1 && arg_count(cmd, removemissing_ARG)) {
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log_error("Please only specify the volume group");
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return EINVALID_CMD_LINE;
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}
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vg_name = argv[0];
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argv++;
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argc--;
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log_verbose("Finding volume group \"%s\"", vg_name);
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if (!lock_vol(cmd, vg_name, LCK_VG_WRITE)) {
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log_error("Can't get lock for %s", vg_name);
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return ECMD_FAILED;
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}
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if ((!(vg = vg_read(cmd, vg_name, NULL, &consistent)) || !consistent) &&
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!arg_count(cmd, removemissing_ARG)) {
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log_error("Volume group \"%s\" doesn't exist", vg_name);
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unlock_vg(cmd, vg_name);
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return ECMD_FAILED;
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}
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if (arg_count(cmd, removemissing_ARG)) {
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if (vg && consistent) {
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log_error("Volume group \"%s\" is already consistent",
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vg_name);
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unlock_vg(cmd, vg_name);
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return ECMD_FAILED;
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}
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init_partial(1);
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consistent = 0;
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if (!(vg = vg_read(cmd, vg_name, NULL, &consistent))) {
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log_error("Volume group \"%s\" not found", vg_name);
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unlock_vg(cmd, vg_name);
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return ECMD_FAILED;
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}
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if (!archive(vg)) {
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init_partial(0);
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unlock_vg(cmd, vg_name);
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return ECMD_FAILED;
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}
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if (!_make_vg_consistent(cmd, vg)) {
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init_partial(0);
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unlock_vg(cmd, vg_name);
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return ECMD_FAILED;
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}
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if (!vg_write(vg) || !vg_commit(vg)) {
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log_error("Failed to write out a consistent VG for %s",
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vg_name);
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unlock_vg(cmd, vg_name);
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return ECMD_FAILED;
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}
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backup(vg);
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log_print("Wrote out consistent volume group %s", vg_name);
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} else {
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if (vg->status & EXPORTED_VG) {
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log_error("Volume group \"%s\" is exported", vg->name);
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unlock_vg(cmd, vg_name);
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return ECMD_FAILED;
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}
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if (!(vg->status & LVM_WRITE)) {
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log_error("Volume group \"%s\" is read-only", vg_name);
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unlock_vg(cmd, vg_name);
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return ECMD_FAILED;
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}
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if (!(vg->status & RESIZEABLE_VG)) {
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log_error("Volume group \"%s\" is not reducible",
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vg_name);
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unlock_vg(cmd, vg_name);
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return ECMD_FAILED;
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}
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/* FIXME: Pass private struct through to all these functions */
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/* and update in batch here? */
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ret = process_each_pv(cmd, argc, argv, vg, NULL,
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_vgreduce_single);
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}
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unlock_vg(cmd, vg_name);
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return ret;
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/******* FIXME
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log_error ("no empty physical volumes found in volume group \"%s\"", vg_name);
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log_verbose
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("volume group \"%s\" will be reduced by %d physical volume%s",
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vg_name, np, np > 1 ? "s" : "");
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log_verbose ("reducing volume group \"%s\" by physical volume \"%s\"",
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vg_name, pv_names[p]);
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log_print
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("volume group \"%s\" %ssuccessfully reduced by physical volume%s:",
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vg_name, error > 0 ? "NOT " : "", p > 1 ? "s" : "");
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log_print("%s", pv_this[p]->pv_name);
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********/
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}
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