ocfs.c revision 2603474ff9be2418900581da1af5cccc9f13cae1
/*
* 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 "libvolume_id.h"
#include "libvolume_id-private.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;
} 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;
} PACKED disk_lock;
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;
} 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];
} PACKED;
int volume_id_probe_ocfs1(struct volume_id *id, uint64_t off, uint64_t size)
{
const uint8_t *buf;
struct ocfs1_super_block_header *osh;
struct ocfs1_super_block_label *osl;
info("probing at offset 0x%llx\n", (unsigned long long) off);
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\n");
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, 0, 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, uint64_t size)
{
const uint8_t *buf;
struct ocfs2_super_block *os;
size_t blksize;
info("probing at offset 0x%llx\n", (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, 0, 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;
}