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#ifndef __GFS2_FS_H
#define __GFS2_FS_H
#define GFS2_MAGIC 0x01161970
#define GFS2_FORMAT_FS 1801
#define GFS2_FORMAT_MULTI 1900
/*
* An on-disk inode number
*/
struct gfs2_inum {
__be64 no_formal_ino;
__be64 no_addr;
};
/*
* Generic metadata head structure
* Every inplace buffer logged in the journal must start with this.
*/
struct gfs2_meta_header {
uint32_t mh_magic;
uint32_t mh_type;
uint64_t __pad0; /* Was generation number in gfs1 */
uint32_t mh_format;
uint32_t __pad1; /* Was incarnation number in gfs1 */
};
/* Requirement: GFS2_LOCKNAME_LEN % 8 == 0
* Includes: the fencing zero at the end */
#define GFS2_LOCKNAME_LEN 64
/*
* super-block structure
*/
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];
/* In gfs1, quota and license dinodes followed */
} __attribute__ ((__packed__));
#endif /* __GFS2_FS_H */
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