diff options
Diffstat (limited to 'usr/kinit/fstype/gfs2_fs.h')
| -rw-r--r-- | usr/kinit/fstype/gfs2_fs.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/usr/kinit/fstype/gfs2_fs.h b/usr/kinit/fstype/gfs2_fs.h new file mode 100644 index 0000000..028e0c9 --- /dev/null +++ b/usr/kinit/fstype/gfs2_fs.h @@ -0,0 +1,56 @@ +#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 */ |