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/*
* Copyright (C) 2002-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2006 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 "lib.h"
#include "lvm1-label.h"
#include "disk-rep.h"
#include "label.h"
#include "metadata.h"
#include "xlate.h"
#include "format1.h"
#include <sys/stat.h>
#include <fcntl.h>
static void _not_supported(const char *op)
{
log_error("The '%s' operation is not supported for the lvm1 labeller.",
op);
}
static int _lvm1_can_handle(struct labeller *l __attribute__((unused)), void *buf, uint64_t sector)
{
struct pv_disk *pvd = (struct pv_disk *) buf;
uint32_t version;
/* LVM1 label must always be in first sector */
if (sector)
return 0;
version = xlate16(pvd->version);
if (pvd->id[0] == 'H' && pvd->id[1] == 'M' &&
(version == 1 || version == 2))
return 1;
return 0;
}
static int _lvm1_write(struct label *label __attribute__((unused)), void *buf __attribute__((unused)))
{
_not_supported("write");
return 0;
}
static int _lvm1_read(struct labeller *l, struct device *dev, void *buf,
struct label **label)
{
struct pv_disk *pvd = (struct pv_disk *) buf;
struct vg_disk vgd;
struct lvmcache_info *info;
const char *vgid = FMT_LVM1_ORPHAN_VG_NAME;
const char *vgname = FMT_LVM1_ORPHAN_VG_NAME;
unsigned exported = 0;
munge_pvd(dev, pvd);
if (*pvd->vg_name) {
if (!read_vgd(dev, &vgd, pvd))
return_0;
vgid = (char *) vgd.vg_uuid;
vgname = (char *) pvd->vg_name;
exported = pvd->pv_status & VG_EXPORTED;
}
if (!(info = lvmcache_add(l, (char *)pvd->pv_uuid, dev, vgname, vgid,
exported)))
return_0;
*label = lvmcache_get_label(info);
lvmcache_set_device_size(info, ((uint64_t)xlate32(pvd->pv_size)) << SECTOR_SHIFT);
lvmcache_del_mdas(info);
lvmcache_make_valid(info);
return 1;
}
static int _lvm1_initialise_label(struct labeller *l __attribute__((unused)), struct label *label)
{
strcpy(label->type, "LVM1");
return 1;
}
static void _lvm1_destroy_label(struct labeller *l __attribute__((unused)), struct label *label __attribute__((unused)))
{
}
static void _lvm1_destroy(struct labeller *l)
{
dm_free(l);
}
struct label_ops _lvm1_ops = {
.can_handle = _lvm1_can_handle,
.write = _lvm1_write,
.read = _lvm1_read,
.verify = _lvm1_can_handle,
.initialise_label = _lvm1_initialise_label,
.destroy_label = _lvm1_destroy_label,
.destroy = _lvm1_destroy,
};
struct labeller *lvm1_labeller_create(struct format_type *fmt)
{
struct labeller *l;
if (!(l = dm_malloc(sizeof(*l)))) {
log_error("Couldn't allocate labeller object.");
return NULL;
}
l->ops = &_lvm1_ops;
l->private = (const void *) fmt;
return l;
}
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