diff options
Diffstat (limited to 'util-linux/volume_id/reiserfs.c')
| -rw-r--r-- | util-linux/volume_id/reiserfs.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/util-linux/volume_id/reiserfs.c b/util-linux/volume_id/reiserfs.c new file mode 100644 index 0000000..98ecec2 --- /dev/null +++ b/util-linux/volume_id/reiserfs.c @@ -0,0 +1,105 @@ +/* + * 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 + */ + +#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]; +} __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; + + dbg("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) { + 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 *) 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); + 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) { + 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; +} |