diff options
Diffstat (limited to 'extras/volume_id/libvolume_id/ocfs.c')
| -rw-r--r-- | extras/volume_id/libvolume_id/ocfs.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/extras/volume_id/libvolume_id/ocfs.c b/extras/volume_id/libvolume_id/ocfs.c new file mode 100644 index 0000000000..faf89bd3e0 --- /dev/null +++ b/extras/volume_id/libvolume_id/ocfs.c @@ -0,0 +1,193 @@ +/* + * volume_id - reads filesystem label and uuid + * + * Copyright (C) 2004 Andre Masella <andre@masella.no-ip.org> + * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org> + * + * 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 ocfs1_super_block_header { + uint32_t minor_version; + uint32_t major_version; + uint8_t signature[128]; + uint8_t mount_point[128]; + uint64_t serial_num; + uint64_t device_size; + uint64_t start_off; + uint64_t bitmap_off; + uint64_t publ_off; + uint64_t vote_off; + uint64_t root_bitmap_off; + uint64_t data_start_off; + uint64_t root_bitmap_size; + uint64_t root_off; + uint64_t root_size; + uint64_t cluster_size; + uint64_t num_nodes; + uint64_t num_clusters; + uint64_t dir_node_size; + uint64_t file_node_size; + uint64_t internal_off; + uint64_t node_cfg_off; + uint64_t node_cfg_size; + uint64_t new_cfg_off; + uint32_t prot_bits; + int32_t excl_mount; +} __attribute__((__packed__)); + +struct ocfs1_super_block_label { + struct ocfs1_disk_lock { + uint32_t curr_master; + uint8_t file_lock; + uint8_t compat_pad[3]; + uint64_t last_write_time; + uint64_t last_read_time; + uint32_t writer_node_num; + uint32_t reader_node_num; + uint64_t oin_node_map; + uint64_t dlock_seq_num; + } disk_lock __attribute__((__packed__)); + uint8_t label[64]; + uint16_t label_len; + uint8_t vol_id[16]; + uint16_t vol_id_len; + uint8_t cluster_name[64]; + uint16_t cluster_name_len; +} __attribute__((__packed__)); + +struct ocfs2_super_block { + uint8_t i_signature[8]; + uint32_t i_generation; + int16_t i_suballoc_slot; + uint16_t i_suballoc_bit; + uint32_t i_reserved0; + uint32_t i_clusters; + uint32_t i_uid; + uint32_t i_gid; + uint64_t i_size; + uint16_t i_mode; + uint16_t i_links_count; + uint32_t i_flags; + uint64_t i_atime; + uint64_t i_ctime; + uint64_t i_mtime; + uint64_t i_dtime; + uint64_t i_blkno; + uint64_t i_last_eb_blk; + uint32_t i_fs_generation; + uint32_t i_atime_nsec; + uint32_t i_ctime_nsec; + uint32_t i_mtime_nsec; + uint64_t i_reserved1[9]; + uint64_t i_pad1; + uint16_t s_major_rev_level; + uint16_t s_minor_rev_level; + uint16_t s_mnt_count; + int16_t s_max_mnt_count; + uint16_t s_state; + uint16_t s_errors; + uint32_t s_checkinterval; + uint64_t s_lastcheck; + uint32_t s_creator_os; + uint32_t s_feature_compat; + uint32_t s_feature_incompat; + uint32_t s_feature_ro_compat; + uint64_t s_root_blkno; + uint64_t s_system_dir_blkno; + uint32_t s_blocksize_bits; + uint32_t s_clustersize_bits; + uint16_t s_max_slots; + uint16_t s_reserved1; + uint32_t s_reserved2; + uint64_t s_first_cluster_group; + uint8_t s_label[64]; + uint8_t s_uuid[16]; +} __attribute__((__packed__)); + +int volume_id_probe_ocfs1(struct volume_id *id, uint64_t off) +{ + const uint8_t *buf; + struct ocfs1_super_block_header *osh; + struct ocfs1_super_block_label *osl; + + buf = volume_id_get_buffer(id, off, 0x200); + if (buf == NULL) + return -1; + + osh = (struct ocfs1_super_block_header *) buf; + if (memcmp(osh->signature, "OracleCFS", 9) != 0) + return -1; + snprintf(id->type_version, sizeof(id->type_version)-1, + "%u.%u", osh->major_version, osh->minor_version); + + dbg("found OracleCFS signature, now reading label"); + buf = volume_id_get_buffer(id, off + 0x200, 0x200); + if (buf == NULL) + return -1; + + osl = (struct ocfs1_super_block_label *) buf; + volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); + if (osl->label_len <= 64) { + volume_id_set_label_raw(id, osl->label, 64); + volume_id_set_label_string(id, osl->label, 64); + } + if (osl->vol_id_len == 16) + volume_id_set_uuid(id, osl->vol_id, UUID_DCE); + id->type = "ocfs"; + return 0; +} + +#define OCFS2_MAX_BLOCKSIZE 0x1000 +#define OCFS2_SUPER_BLOCK_BLKNO 2 + +int volume_id_probe_ocfs2(struct volume_id *id, uint64_t off) +{ + const uint8_t *buf; + struct ocfs2_super_block *os; + size_t blksize; + + dbg("probing at offset 0x%llx", (unsigned long long) off); + + for (blksize = 0x200; blksize <= OCFS2_MAX_BLOCKSIZE; blksize <<= 1) { + buf = volume_id_get_buffer(id, off + OCFS2_SUPER_BLOCK_BLKNO * blksize, 0x200); + if (buf == NULL) + return -1; + + os = (struct ocfs2_super_block *) buf; + if (memcmp(os->i_signature, "OCFSV2", 6) != 0) + continue; + + volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); + volume_id_set_label_raw(id, os->s_label, 64); + volume_id_set_label_string(id, os->s_label, 64); + volume_id_set_uuid(id, os->s_uuid, UUID_DCE); + snprintf(id->type_version, sizeof(id->type_version)-1, + "%u.%u", os->s_major_rev_level, os->s_minor_rev_level); + id->type = "ocfs2"; + return 0; + } + return -1; +} |