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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
* Copyright (C) 2005 Zak Kipling. 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"
struct pvresize_params {
uint64_t new_size;
unsigned done;
unsigned total;
};
static int _pv_resize_single(struct cmd_context *cmd,
struct volume_group *vg,
struct physical_volume *pv,
const uint64_t new_size)
{
struct pv_list *pvl;
uint64_t size = 0;
uint32_t new_pe_count = 0;
int r = 0;
struct dm_list mdas;
const char *pv_name = pv_dev_name(pv);
const char *vg_name;
struct lvmcache_info *info;
int mda_count = 0;
struct volume_group *old_vg = vg;
dm_list_init(&mdas);
if (is_orphan_vg(pv_vg_name(pv))) {
vg_name = VG_ORPHANS;
if (!lock_vol(cmd, vg_name, LCK_VG_WRITE)) {
log_error("Can't get lock for orphans");
return 0;
}
if (!(pv = pv_read(cmd, pv_name, &mdas, NULL, 1, 0))) {
unlock_vg(cmd, vg_name);
log_error("Unable to read PV \"%s\"", pv_name);
return 0;
}
mda_count = dm_list_size(&mdas);
} else {
vg_name = pv_vg_name(pv);
vg = vg_read_for_update(cmd, vg_name, NULL, 0);
if (vg_read_error(vg))
goto bad;
if (!(pvl = find_pv_in_vg(vg, pv_name))) {
log_error("Unable to find \"%s\" in volume group \"%s\"",
pv_name, vg->name);
goto bad;
}
pv = pvl->pv;
if (!(info = info_from_pvid(pv->dev->pvid, 0))) {
log_error("Can't get info for PV %s in volume group %s",
pv_name, vg->name);
goto bad;
}
mda_count = dm_list_size(&info->mdas);
if (!archive(vg))
goto bad;
}
/* FIXME Create function to test compatibility properly */
if (mda_count > 1) {
log_error("%s: too many metadata areas for pvresize", pv_name);
goto bad;
}
if (!(pv->fmt->features & FMT_RESIZE_PV)) {
log_error("Physical volume %s format does not support resizing.",
pv_name);
goto bad;
}
/* Get new size */
if (!dev_get_size(pv_dev(pv), &size)) {
log_error("%s: Couldn't get size.", pv_name);
goto bad;
}
if (new_size) {
if (new_size > size)
log_warn("WARNING: %s: Overriding real size. "
"You could lose data.", pv_name);
log_verbose("%s: Pretending size is %" PRIu64 " not %" PRIu64
" sectors.", pv_name, new_size, pv_size(pv));
size = new_size;
}
if (size < PV_MIN_SIZE) {
log_error("%s: Size must exceed minimum of %ld sectors.",
pv_name, PV_MIN_SIZE);
goto bad;
}
if (size < pv_pe_start(pv)) {
log_error("%s: Size must exceed physical extent start of "
"%" PRIu64 " sectors.", pv_name, pv_pe_start(pv));
goto bad;
}
pv->size = size;
if (vg) {
pv->size -= pv_pe_start(pv);
new_pe_count = pv_size(pv) / vg->extent_size;
if (!new_pe_count) {
log_error("%s: Size must leave space for at "
"least one physical extent of "
"%" PRIu32 " sectors.", pv_name,
pv_pe_size(pv));
goto bad;
}
if (!pv_resize(pv, vg, new_pe_count))
goto_bad;
}
log_verbose("Resizing volume \"%s\" to %" PRIu64 " sectors.",
pv_name, pv_size(pv));
log_verbose("Updating physical volume \"%s\"", pv_name);
if (!is_orphan_vg(pv_vg_name(pv))) {
if (!vg_write(vg) || !vg_commit(vg)) {
log_error("Failed to store physical volume \"%s\" in "
"volume group \"%s\"", pv_name, vg->name);
goto bad;
}
backup(vg);
} else if (!(pv_write(cmd, pv, NULL, INT64_C(-1)))) {
log_error("Failed to store physical volume \"%s\"",
pv_name);
goto bad;;
}
log_print("Physical volume \"%s\" changed", pv_name);
r = 1;
bad:
unlock_vg(cmd, vg_name);
if (!old_vg)
vg_release(vg);
return r;
}
static int _pvresize_single(struct cmd_context *cmd,
struct volume_group *vg,
struct physical_volume *pv,
void *handle)
{
struct pvresize_params *params = (struct pvresize_params *) handle;
params->total++;
if (!_pv_resize_single(cmd, vg, pv, params->new_size))
return ECMD_FAILED;
params->done++;
return ECMD_PROCESSED;
}
int pvresize(struct cmd_context *cmd, int argc, char **argv)
{
struct pvresize_params params;
int ret;
if (!argc) {
log_error("Please supply physical volume(s)");
return EINVALID_CMD_LINE;
}
if (arg_sign_value(cmd, physicalvolumesize_ARG, 0) == SIGN_MINUS) {
log_error("Physical volume size may not be negative");
return 0;
}
params.new_size = arg_uint64_value(cmd, physicalvolumesize_ARG,
UINT64_C(0));
params.done = 0;
params.total = 0;
ret = process_each_pv(cmd, argc, argv, NULL, LCK_VG_WRITE, 0, ¶ms,
_pvresize_single);
log_print("%d physical volume(s) resized / %d physical volume(s) "
"not resized", params.done, params.total - params.done);
return ret;
}
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