diff options
Diffstat (limited to 'extras/volume_id/libvolume_id/reiserfs.c')
| -rw-r--r-- | extras/volume_id/libvolume_id/reiserfs.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/extras/volume_id/libvolume_id/reiserfs.c b/extras/volume_id/libvolume_id/reiserfs.c new file mode 100644 index 0000000000..0eecbda5cb --- /dev/null +++ b/extras/volume_id/libvolume_id/reiserfs.c @@ -0,0 +1,119 @@ +/* + * 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 program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation version 2 of the License. + */ + +#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 "volume_id.h" +#include "logging.h" +#include "util.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]; +} __attribute__((__packed__)); + +struct reiser4_super_block { + uint8_t magic[16]; + uint16_t dummy[2]; + uint8_t uuid[16]; + uint8_t label[16]; + uint64_t dummy2; +} __attribute__((__packed__)); + +#define REISERFS1_SUPERBLOCK_OFFSET 0x2000 +#define REISERFS_SUPERBLOCK_OFFSET 0x10000 + +int volume_id_probe_reiserfs(struct volume_id *id, uint64_t off) +{ + struct reiserfs_super_block *rs; + struct reiser4_super_block *rs4; + uint8_t *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"); + id->type = "reiserfs"; + goto found; + } + if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) { + strcpy(id->type_version, "3.6"); + id->type = "reiserfs"; + goto found_label; + } + if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) { + strcpy(id->type_version, "JR"); + id->type = "reiserfs"; + 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); + id->type = "reiser4"; + goto found; + } + + buf = volume_id_get_buffer(id, off + REISERFS1_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"); + id->type = "reiserfs"; + 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); + + return 0; +} |