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119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
/*
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* volume_id - reads filesystem label and uuid
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*
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* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
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* Copyright (C) 2005 Tobias Klauser <tklauser@access.unizh.ch>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#endif
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include "libvolume_id.h"
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#include "util.h"
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struct reiserfs_super_block {
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uint32_t blocks_count;
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uint32_t free_blocks;
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uint32_t root_block;
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uint32_t journal_block;
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uint32_t journal_dev;
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uint32_t orig_journal_size;
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uint32_t dummy2[5];
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uint16_t blocksize;
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uint16_t dummy3[3];
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uint8_t magic[12];
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uint32_t dummy4[5];
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uint8_t uuid[16];
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uint8_t label[16];
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} PACKED;
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struct reiser4_super_block {
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uint8_t magic[16];
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uint16_t dummy[2];
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uint8_t uuid[16];
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uint8_t label[16];
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uint64_t dummy2;
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} PACKED;
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#define REISERFS1_SUPERBLOCK_OFFSET 0x2000
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#define REISERFS_SUPERBLOCK_OFFSET 0x10000
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int volume_id_probe_reiserfs(struct volume_id *id, uint64_t off, uint64_t size)
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{
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struct reiserfs_super_block *rs;
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struct reiser4_super_block *rs4;
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uint8_t *buf;
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info("probing at offset 0x%llx", (unsigned long long) off);
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buf = volume_id_get_buffer(id, off + REISERFS_SUPERBLOCK_OFFSET, 0x200);
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if (buf == NULL)
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return -1;
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rs = (struct reiserfs_super_block *) buf;
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if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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strcpy(id->type_version, "3.5");
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id->type = "reiserfs";
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goto found;
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}
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if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
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strcpy(id->type_version, "3.6");
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id->type = "reiserfs";
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goto found_label;
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}
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if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
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strcpy(id->type_version, "JR");
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id->type = "reiserfs";
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goto found_label;
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}
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rs4 = (struct reiser4_super_block *) buf;
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if (memcmp(rs4->magic, "ReIsEr4", 7) == 0) {
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strcpy(id->type_version, "4");
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volume_id_set_label_raw(id, rs4->label, 16);
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volume_id_set_label_string(id, rs4->label, 16);
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volume_id_set_uuid(id, rs4->uuid, UUID_DCE);
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id->type = "reiser4";
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goto found;
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}
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buf = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200);
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if (buf == NULL)
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return -1;
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rs = (struct reiserfs_super_block *) buf;
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if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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strcpy(id->type_version, "3.5");
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id->type = "reiserfs";
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goto found;
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}
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return -1;
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found_label:
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volume_id_set_label_raw(id, rs->label, 16);
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volume_id_set_label_string(id, rs->label, 16);
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volume_id_set_uuid(id, rs->uuid, UUID_DCE);
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found:
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volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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return 0;
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}
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