source: MondoRescue/branches/3.3/mindi-busybox/util-linux/volume_id/reiserfs.c@ 3621

/*
 * volume_id - reads filesystem label and uuid
 *
 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
 * Copyright (C) 2005 Tobias Klauser <tklauser@access.unizh.ch>
 *
 *  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_REISERFS) += reiserfs.o

//config:
//config:config FEATURE_VOLUMEID_REISERFS
//config:   bool "Reiser filesystem"
//config:   default y
//config:   depends on VOLUMEID
//config:   help
//config:     TODO
//config:

#include "volume_id_internal.h"

struct reiserfs_super_block {
    uint32_t    blocks_count;
    uint32_t    free_blocks;
    uint32_t    root_block;
    uint32_t    journal_block;
    uint32_t    journal_dev;
    uint32_t    orig_journal_size;
    uint32_t    dummy2[5];
    uint16_t    blocksize;
    uint16_t    dummy3[3];
    uint8_t     magic[12];
    uint32_t    dummy4[5];
    uint8_t     uuid[16];
    uint8_t     label[16];
} PACKED;

struct reiser4_super_block {
    uint8_t     magic[16];
    uint16_t    dummy[2];
    uint8_t     uuid[16];
    uint8_t     label[16];
    uint64_t    dummy2;
} PACKED;

#define REISERFS1_SUPERBLOCK_OFFSET     0x2000
#define REISERFS_SUPERBLOCK_OFFSET      0x10000

int FAST_FUNC volume_id_probe_reiserfs(struct volume_id *id /*,uint64_t off*/)
{
#define off ((uint64_t)0)
    struct reiserfs_super_block *rs;
    struct reiser4_super_block *rs4;

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

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

    if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
        dbg("reiserfs: ReIsErFs, no label");
//      strcpy(id->type_version, "3.5");
        goto found;
    }
    if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
        dbg("reiserfs: ReIsEr2Fs");
//      strcpy(id->type_version, "3.6");
        goto found_label;
    }
    if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
        dbg("reiserfs: ReIsEr3Fs");
//      strcpy(id->type_version, "JR");
        goto found_label;
    }

    rs4 = (struct reiser4_super_block *) rs;
    if (memcmp(rs4->magic, "ReIsEr4", 7) == 0) {
//      strcpy(id->type_version, "4");
//      volume_id_set_label_raw(id, rs4->label, 16);
        volume_id_set_label_string(id, rs4->label, 16);
        volume_id_set_uuid(id, rs4->uuid, UUID_DCE);
        dbg("reiserfs: ReIsEr4, label '%s' uuid '%s'", id->label, id->uuid);
        goto found;
    }

    rs = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200);
    if (rs == NULL)
        return -1;

    if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
        dbg("reiserfs: ReIsErFs, no label");
//      strcpy(id->type_version, "3.5");
        goto found;
    }

    dbg("reiserfs: no signature found");
    return -1;

 found_label:
//  volume_id_set_label_raw(id, rs->label, 16);
    volume_id_set_label_string(id, rs->label, 16);
    volume_id_set_uuid(id, rs->uuid, UUID_DCE);
    dbg("reiserfs: label '%s' uuid '%s'", id->label, id->uuid);

 found:
//  volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
    IF_FEATURE_BLKID_TYPE(id->type = "reiserfs";)

    return 0;
}