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/*
* Copyright (C) 1997-2004 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 "label.h"
#include "metadata.h"
#include "disk_rep.h"
#include "pool_label.h"
#include <sys/stat.h>
#include <fcntl.h>
static void _pool_not_supported(const char *op)
{
log_error("The '%s' operation is not supported for the pool labeller.",
op);
}
static int _pool_can_handle(struct labeller *l __attribute__((unused)), void *buf, uint64_t sector)
{
struct pool_disk pd;
/*
* POOL label must always be in first sector
*/
if (sector)
return 0;
pool_label_in(&pd, buf);
/* can ignore 8 rightmost bits for ondisk format check */
if ((pd.pl_magic == POOL_MAGIC) &&
(pd.pl_version >> 8 == POOL_VERSION >> 8))
return 1;
return 0;
}
static int _pool_write(struct label *label __attribute__((unused)), void *buf __attribute__((unused)))
{
_pool_not_supported("write");
return 0;
}
static int _pool_read(struct labeller *l, struct device *dev, void *buf,
struct label **label)
{
struct pool_list pl;
return read_pool_label(&pl, l, dev, buf, label);
}
static int _pool_initialise_label(struct labeller *l __attribute__((unused)), struct label *label)
{
strcpy(label->type, "POOL");
return 1;
}
static void _pool_destroy_label(struct labeller *l __attribute__((unused)), struct label *label __attribute__((unused)))
{
}
static void _label_pool_destroy(struct labeller *l)
{
dm_free(l);
}
struct label_ops _pool_ops = {
.can_handle = _pool_can_handle,
.write = _pool_write,
.read = _pool_read,
.verify = _pool_can_handle,
.initialise_label = _pool_initialise_label,
.destroy_label = _pool_destroy_label,
.destroy = _label_pool_destroy,
};
struct labeller *pool_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 = &_pool_ops;
l->private = (const void *) fmt;
return l;
}
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