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/*
File: gfs2.h
Copyright (C) 2011 Christophe GRENIER <grenier@cgsecurity.org>
This software 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; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _GFS2_H
#define _GFS2_H
#ifdef __cplusplus
extern "C" {
#endif
// Structure from gfs2_ondisk.h
#define GFS2_MAGIC 0x01161970
#define GFS2_BASIC_BLOCK 512
#define GFS2_BASIC_BLOCK_SHIFT 9
#define GFS2_FORMAT_SB 100
/*
* An on-disk inode number
*/
struct gfs2_inum {
uint64_t no_formal_ino;
uint64_t no_addr;
};
struct gfs2_meta_header {
uint32_t mh_magic;
uint32_t mh_type;
uint64_t __pad0; /* Was generation number in gfs1 */
uint32_t mh_format;
/* This union is to keep userspace happy */
union {
uint32_t mh_jid; /* Was incarnation number in gfs1 */
uint32_t __pad1;
};
};
/* Address of superblock in GFS2 basic blocks */
#define GFS2_SB_ADDR 128
#define GFS2_LOCKNAME_LEN 64
struct gfs2_sb {
struct gfs2_meta_header sb_header;
uint32_t sb_fs_format;
uint32_t sb_multihost_format;
uint32_t __pad0; /* Was superblock flags in gfs1 */
uint32_t sb_bsize;
uint32_t sb_bsize_shift;
uint32_t __pad1; /* Was journal segment size in gfs1 */
struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */
struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */
struct gfs2_inum sb_root_dir;
char sb_lockproto[GFS2_LOCKNAME_LEN];
char sb_locktable[GFS2_LOCKNAME_LEN];
struct gfs2_inum __pad3; /* Was quota inode in gfs1 */
struct gfs2_inum __pad4; /* Was licence inode in gfs1 */
#define GFS2_HAS_UUID 1
uint8_t sb_uuid[16]; /* The UUID, maybe 0 for backwards compat */
};
/*@
@ requires \valid(disk_car);
@ requires valid_disk(disk_car);
@ requires \valid(partition);
@ requires \separated(disk_car, partition);
@ decreases 0;
@*/
int check_gfs2(disk_t *disk_car, partition_t *partition);
/*@
@ requires \valid_read(disk_car);
@ requires valid_disk(disk_car);
@ requires \valid_read(sb);
@ requires \valid(partition);
@ requires \separated(disk_car, sb, partition);
@*/
int recover_gfs2(const disk_t *disk_car, const struct gfs2_sb *sb, partition_t *partition, const int dump_ind);
#ifdef __cplusplus
} /* closing brace for extern "C" */
#endif
#endif
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