source: MondoRescue/branches/2.2.9/mindi-busybox/util-linux/volume_id/jfs.c@ 3844

/*
 * 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
 */

#include "volume_id_internal.h"

struct jfs_super_block {
    uint8_t     magic[4];
    uint32_t    version;
    uint64_t    size;
    uint32_t    bsize;
    uint32_t    dummy1;
    uint32_t    pbsize;
    uint32_t    dummy2[27];
    uint8_t     uuid[16];
    uint8_t     label[16];
    uint8_t     loguuid[16];
} PACKED;

#define JFS_SUPERBLOCK_OFFSET           0x8000

int FAST_FUNC volume_id_probe_jfs(struct volume_id *id /*,uint64_t off*/)
{
#define off ((uint64_t)0)
    struct jfs_super_block *js;

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

    js = volume_id_get_buffer(id, off + JFS_SUPERBLOCK_OFFSET, 0x200);
    if (js == NULL)
        return -1;

    if (memcmp(js->magic, "JFS1", 4) != 0)
        return -1;

//  volume_id_set_label_raw(id, js->label, 16);
    volume_id_set_label_string(id, js->label, 16);
    volume_id_set_uuid(id, js->uuid, UUID_DCE);

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

    return 0;
}