/*
* Copyright (C) 2009 by Andreas Dilger <adilger@sun.com>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <inttypes.h>
#include "superblocks.h"
/* #include <sys/uberblock_impl.h> */
#define UBERBLOCK_MAGIC 0x00bab10c /* oo-ba-bloc! */
struct zfs_uberblock {
uint64_t ub_magic; /* UBERBLOCK_MAGIC */
uint64_t ub_version; /* SPA_VERSION */
uint64_t ub_txg; /* txg of last sync */
uint64_t ub_guid_sum; /* sum of all vdev guids */
uint64_t ub_timestamp; /* UTC time of last sync */
/*blkptr_t ub_rootbp;*/ /* MOS objset_phys_t */
};
static int probe_zfs(blkid_probe pr, const struct blkid_idmag *mag)
{
struct zfs_uberblock *ub;
int swab_endian;
uint64_t spa_version;
ub = blkid_probe_get_sb(pr, mag, struct zfs_uberblock);
if (!ub)
return -1;
swab_endian = (ub->ub_magic == swab64(UBERBLOCK_MAGIC));
spa_version = swab_endian ? swab64(ub->ub_version) : ub->ub_version;
blkid_probe_sprintf_version(pr, "%" PRIu64, spa_version);
#if 0
/* read nvpair data for pool name, pool GUID from the MOS, but
* unfortunately this is more complex than it could be */
blkid_probe_set_label(pr, pool_name, pool_len));
blkid_probe_set_uuid(pr, pool_guid);
#endif
return 0;
}
const struct blkid_idinfo zfs_idinfo =
{
.name = "zfs",
.usage = BLKID_USAGE_FILESYSTEM,
.probefunc = probe_zfs,
.magics =
{
{ .magic = "\0\0\x02\xf5\xb0\x07\xb1\x0c", .len = 8, .kboff = 8 },
{ .magic = "\x1c\xb1\x07\xb0\xf5\x02\0\0", .len = 8, .kboff = 8 },
{ .magic = "\0\0\x02\xf5\xb0\x07\xb1\x0c", .len = 8, .kboff = 264 },
{ .magic = "\x0c\xb1\x07\xb0\xf5\x02\0\0", .len = 8, .kboff = 264 },
{ NULL }
}
};