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git://sourceware.org/git/lvm2.git
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f65dd341a5
Previously, we have relied on UUIDs alone, and on lvmcache to make getting a "new copy" of VG metadata fast. If the code which triggers the activation has the correct VG metadata at hand (the version which is currently on disk), it can now hand it to the activation code directly.
354 lines
8.6 KiB
C
354 lines
8.6 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2009 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 Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser 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 _remove_pv(struct volume_group *vg, struct pv_list *pvl, int silent)
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{
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char uuid[64] __attribute__((aligned(8)));
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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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return_0;
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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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if (!silent)
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log_error("LVs still present on PV with UUID %s: "
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"Can't remove 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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del_pvl_from_vgs(vg, pvl);
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free_pv_fid(pvl->pv);
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return 1;
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}
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static int _consolidate_vg(struct cmd_context *cmd, struct volume_group *vg)
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{
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struct pv_list *pvl;
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struct lv_list *lvl;
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int r = 1;
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dm_list_iterate_items(lvl, &vg->lvs)
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if (lvl->lv->status & PARTIAL_LV) {
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log_warn("WARNING: Partial LV %s needs to be repaired "
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"or removed. ", lvl->lv->name);
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r = 0;
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}
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if (!r) {
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cmd->handles_missing_pvs = 1;
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log_error("There are still partial LVs in VG %s.", vg->name);
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log_error("To remove them unconditionally use: vgreduce --removemissing --force.");
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log_warn("Proceeding to remove empty missing PVs.");
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}
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dm_list_iterate_items(pvl, &vg->pvs) {
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if (pvl->pv->dev && !is_missing_pv(pvl->pv))
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continue;
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if (r && !_remove_pv(vg, pvl, 0))
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return_0;
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}
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return r;
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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 lv_list *lvl;
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struct logical_volume *lv;
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cmd->partial_activation = 1;
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restart:
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vg_mark_partial_lvs(vg, 1);
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dm_list_iterate_items(lvl, &vg->lvs) {
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lv = lvl->lv;
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/* Are any segments of this LV on missing PVs? */
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if (lv->status & PARTIAL_LV) {
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if (seg_is_raid(first_seg(lv))) {
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if (!lv_raid_remove_missing(lv))
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return_0;
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goto restart;
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}
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if (lv->status & MIRRORED) {
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if (!mirror_remove_missing(cmd, lv, 1))
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return_0;
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goto restart;
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}
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if (arg_count(cmd, mirrorsonly_ARG) &&!(lv->status & MIRRORED)) {
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log_error("Non-mirror-image LV %s found: can't remove.", lv->name);
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continue;
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}
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if (!lv_is_visible(lv))
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continue;
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log_warn("Removing partial LV %s.", lv->name);
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if (!lv_remove_with_dependencies(cmd, lv, DONT_PROMPT, 0))
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return_0;
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goto restart;
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}
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}
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_consolidate_vg(cmd, vg);
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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,
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void *handle __attribute__((unused)))
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{
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struct pv_list *pvl;
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struct volume_group *orphan_vg = NULL;
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int r = ECMD_FAILED;
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const char *name = pv_dev_name(pv);
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if (!vg) {
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log_error(INTERNAL_ERROR "VG is NULL.");
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return ECMD_FAILED;
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}
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if (pv_pe_alloc_count(pv)) {
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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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if (!lock_vol(cmd, VG_ORPHANS, LCK_VG_WRITE, NULL)) {
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log_error("Can't get lock for orphan PVs");
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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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goto_bad;
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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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del_pvl_from_vgs(vg, pvl);
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pv->vg_name = vg->fid->fmt->orphan_vg_name;
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pv->status = ALLOCATABLE_PV;
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if (!dev_get_size(pv_dev(pv), &pv->size)) {
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log_error("%s: Couldn't get size.", pv_dev_name(pv));
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goto bad;
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}
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vg->free_count -= pv_pe_count(pv) - pv_pe_alloc_count(pv);
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vg->extent_count -= pv_pe_count(pv);
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orphan_vg = vg_read_for_update(cmd, vg->fid->fmt->orphan_vg_name,
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NULL, 0);
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if (vg_read_error(orphan_vg))
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goto bad;
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if (!vg_split_mdas(cmd, vg, orphan_vg) || !vg->pv_count) {
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log_error("Cannot remove final metadata area on \"%s\" from \"%s\"",
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name, vg->name);
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goto bad;
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}
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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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goto bad;
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}
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if (!pv_write(cmd, pv, 0)) {
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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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goto bad;
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}
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backup(vg);
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log_print_unless_silent("Removed \"%s\" from volume group \"%s\"", name, vg->name);
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r = ECMD_PROCESSED;
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bad:
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if (pvl)
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free_pv_fid(pvl->pv);
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unlock_and_release_vg(cmd, orphan_vg, VG_ORPHANS);
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return r;
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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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const char *vg_name;
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int ret = ECMD_FAILED;
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int fixed = 1;
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int repairing = arg_count(cmd, removemissing_ARG);
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int saved_ignore_suspended_devices = ignore_suspended_devices();
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int locked = 0;
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if (!argc && !repairing) {
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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) { /* repairing */
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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) && !repairing) {
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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) && !repairing) {
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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 && repairing) {
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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 = skip_dev_dir(cmd, argv[0], NULL);
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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 (repairing) {
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init_ignore_suspended_devices(1);
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cmd->handles_missing_pvs = 1;
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}
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vg = vg_read_for_update(cmd, vg_name, NULL, READ_ALLOW_EXPORTED);
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if (vg_read_error(vg) == FAILED_ALLOCATION ||
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vg_read_error(vg) == FAILED_NOTFOUND)
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goto_out;
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/* FIXME We want to allow read-only VGs to be changed here? */
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if (vg_read_error(vg) && vg_read_error(vg) != FAILED_READ_ONLY
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&& !arg_count(cmd, removemissing_ARG))
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goto_out;
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locked = !vg_read_error(vg);
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if (repairing) {
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if (!vg_read_error(vg) && !vg_missing_pv_count(vg)) {
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log_error("Volume group \"%s\" is already consistent",
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vg_name);
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ret = ECMD_PROCESSED;
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goto out;
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}
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release_vg(vg);
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log_verbose("Trying to open VG %s for recovery...", vg_name);
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vg = vg_read_for_update(cmd, vg_name, NULL,
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READ_ALLOW_INCONSISTENT
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| READ_ALLOW_EXPORTED);
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locked |= !vg_read_error(vg);
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if (vg_read_error(vg) && vg_read_error(vg) != FAILED_READ_ONLY
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&& vg_read_error(vg) != FAILED_INCONSISTENT)
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goto_out;
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if (!archive(vg))
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goto_out;
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if (arg_count(cmd, force_ARG)) {
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if (!_make_vg_consistent(cmd, vg))
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goto_out;
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} else
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fixed = _consolidate_vg(cmd, vg);
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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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goto out;
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}
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backup(vg);
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if (fixed) {
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log_print_unless_silent("Wrote out consistent volume group %s",
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vg_name);
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ret = ECMD_PROCESSED;
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} else
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ret = ECMD_FAILED;
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} else {
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if (!vg_check_status(vg, EXPORTED_VG | LVM_WRITE | RESIZEABLE_VG))
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goto_out;
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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, READ_FOR_UPDATE, 0, NULL,
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_vgreduce_single);
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}
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out:
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init_ignore_suspended_devices(saved_ignore_suspended_devices);
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if (locked)
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unlock_vg(cmd, vg_name);
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release_vg(vg);
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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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