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Sourcecode: udev version File versions

reiserfs.c

/*
 * 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
 */

#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <asm/types.h>

#include "volume_id.h"
#include "logging.h"
#include "util.h"
#include "reiserfs.h"

struct reiserfs_super_block {
      __u32 blocks_count;
      __u32 free_blocks;
      __u32 root_block;
      __u32 journal_block;
      __u32 journal_dev;
      __u32 orig_journal_size;
      __u32 dummy2[5];
      __u16 blocksize;
      __u16 dummy3[3];
      __u8  magic[12];
      __u32 dummy4[5];
      __u8  uuid[16];
      __u8  label[16];
} __attribute__((__packed__));

struct reiser4_super_block {
      __u8  magic[16];
      __u16 dummy[2];
      __u8  uuid[16];
      __u8  label[16];
      __u64 dummy2;
} __attribute__((__packed__));

#define REISERFS1_SUPERBLOCK_OFFSET       0x2000
#define REISERFS_SUPERBLOCK_OFFSET        0x10000

int volume_id_probe_reiserfs(struct volume_id *id, __u64 off)
{
      struct reiserfs_super_block *rs;
      struct reiser4_super_block *rs4;
      __u8 *buf;

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

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

      rs = (struct reiserfs_super_block *) buf;;
      if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
            strcpy(id->type_version, "3.5");
            goto found;
      }
      if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
            strcpy(id->type_version, "3.6");
            goto found_label;
      }
      if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
            strcpy(id->type_version, "JR");
            goto found_label;
      }

      rs4 = (struct reiser4_super_block *) buf;
      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);
            goto found;
      }

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

      if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
            strcpy(id->type_version, "3.5");
            goto 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);

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

      return 0;
}

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