source: MondoRescue/branches/3.3/mindi-busybox/util-linux/volume_id/xfs.c@ 3625

/*
 * volume_id - reads filesystem label and uuid
 *
 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

//kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_XFS) += xfs.o

//config:
//config:config FEATURE_VOLUMEID_XFS
//config:   bool "xfs filesystem"
//config:   default y
//config:   depends on VOLUMEID
//config:   help
//config:     TODO
//config:

#include "volume_id_internal.h"

struct xfs_super_block {
    uint8_t magic[4];
    uint32_t    blocksize;
    uint64_t    dblocks;
    uint64_t    rblocks;
    uint32_t    dummy1[2];
    uint8_t uuid[16];
    uint32_t    dummy2[15];
    uint8_t fname[12];
    uint32_t    dummy3[2];
    uint64_t    icount;
    uint64_t    ifree;
    uint64_t    fdblocks;
} PACKED;

int FAST_FUNC volume_id_probe_xfs(struct volume_id *id /*,uint64_t off*/)
{
#define off ((uint64_t)0)
    struct xfs_super_block *xs;

    dbg("probing at offset 0x%llx", (unsigned long long) off);

    xs = volume_id_get_buffer(id, off, 0x200);
    if (xs == NULL)
        return -1;

    if (memcmp(xs->magic, "XFSB", 4) != 0)
        return -1;

//  volume_id_set_label_raw(id, xs->fname, 12);
    volume_id_set_label_string(id, xs->fname, 12);
    volume_id_set_uuid(id, xs->uuid, UUID_DCE);

//  volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
    IF_FEATURE_BLKID_TYPE(id->type = "xfs";)

    return 0;
}