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mirror of git://sourceware.org/git/lvm2.git synced 2024-12-22 17:35:59 +03:00
lvm2/tools/pvremove.c
Petr Rockai f65dd341a5 locking: Make it possible to pass down an LV to activation code.
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.
2013-06-10 17:26:38 +02:00

164 lines
4.1 KiB
C

/*
* Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tools.h"
const char _really_wipe[] =
"Really WIPE LABELS from physical volume \"%s\" of volume group \"%s\" [y/n]? ";
/*
* Decide whether it is "safe" to wipe the labels on this device.
* 0 indicates we may not.
*/
static int pvremove_check(struct cmd_context *cmd, const char *name)
{
struct physical_volume *pv;
/* FIXME Check partition type is LVM unless --force is given */
/* Is there a pv here already? */
/* If not, this is an error unless you used -f. */
if (!(pv = pv_read(cmd, name, 1, 0))) {
if (arg_count(cmd, force_ARG))
return 1;
log_error("Physical Volume %s not found", name);
return 0;
}
/*
* If a PV has no MDAs it may appear to be an
* orphan until the metadata is read off
* another PV in the same VG. Detecting this
* means checking every VG by scanning every
* PV on the system.
*/
if (is_orphan(pv) && !dm_list_size(&pv->fid->metadata_areas_in_use) &&
!dm_list_size(&pv->fid->metadata_areas_ignored)) {
if (!scan_vgs_for_pvs(cmd, 0)) {
log_error("Rescan for PVs without metadata areas "
"failed.");
goto bad;
}
free_pv_fid(pv);
if (!(pv = pv_read(cmd, name, 1, 0))) {
log_error("Failed to read physical volume %s", name);
goto bad;
}
}
/* orphan ? */
if (is_orphan(pv)) {
free_pv_fid(pv);
return 1;
}
/* Allow partial & exported VGs to be destroyed. */
/* we must have -ff to overwrite a non orphan */
if (arg_count(cmd, force_ARG) < 2) {
log_error("PV %s belongs to Volume Group %s so please use vgreduce first.", name, pv_vg_name(pv));
log_error("(If you are certain you need pvremove, then confirm by using --force twice.)");
goto bad;
}
/* prompt */
if (!arg_count(cmd, yes_ARG) &&
yes_no_prompt(_really_wipe, name, pv_vg_name(pv)) == 'n') {
log_error("%s: physical volume label not removed", name);
goto bad;
}
if (arg_count(cmd, force_ARG)) {
log_warn("WARNING: Wiping physical volume label from "
"%s%s%s%s", name,
!is_orphan(pv) ? " of volume group \"" : "",
!is_orphan(pv) ? pv_vg_name(pv) : "",
!is_orphan(pv) ? "\"" : "");
}
free_pv_fid(pv);
return 1;
bad:
free_pv_fid(pv);
return 0;
}
static int pvremove_single(struct cmd_context *cmd, const char *pv_name,
void *handle __attribute__((unused)))
{
struct device *dev;
int ret = ECMD_FAILED;
if (!lock_vol(cmd, VG_ORPHANS, LCK_VG_WRITE, NULL)) {
log_error("Can't get lock for orphan PVs");
return ECMD_FAILED;
}
if (!pvremove_check(cmd, pv_name))
goto out;
if (!(dev = dev_cache_get(pv_name, cmd->filter))) {
log_error("%s: Couldn't find device. Check your filters?",
pv_name);
goto out;
}
if (!dev_test_excl(dev)) {
/* FIXME Detect whether device-mapper is still using the device */
log_error("Can't open %s exclusively - not removing. "
"Mounted filesystem?", dev_name(dev));
goto out;
}
/* Wipe existing label(s) */
if (!label_remove(dev)) {
log_error("Failed to wipe existing label(s) on %s", pv_name);
goto out;
}
if (!lvmetad_pv_gone_by_dev(dev, NULL))
goto_out;
log_print_unless_silent("Labels on physical volume \"%s\" successfully wiped",
pv_name);
ret = ECMD_PROCESSED;
out:
unlock_vg(cmd, VG_ORPHANS);
return ret;
}
int pvremove(struct cmd_context *cmd, int argc, char **argv)
{
int i, r;
int ret = ECMD_PROCESSED;
if (!argc) {
log_error("Please enter a physical volume path");
return EINVALID_CMD_LINE;
}
for (i = 0; i < argc; i++) {
dm_unescape_colons_and_at_signs(argv[i], NULL, NULL);
r = pvremove_single(cmd, argv[i], NULL);
if (r > ret)
ret = r;
}
return ret;
}