| #ifndef _OCFS2_FS_H |
| #define _OCFS2_FS_H |
| |
| /* Object signatures */ |
| #define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2" |
| |
| #define OCFS2_VOL_UUID_LEN 16 |
| #define OCFS2_MAX_VOL_LABEL_LEN 64 |
| |
| /* |
| * On disk superblock for OCFS2 |
| * Note that it is contained inside an ocfs2_dinode, so all offsets |
| * are relative to the start of ocfs2_dinode.id2. |
| */ |
| struct ocfs2_super_block { |
| /*00*/ 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; /* File system state */ |
| uint16_t s_errors; /* Behaviour when detecting errors */ |
| uint32_t s_checkinterval; /* Max time between checks */ |
| /*10*/ uint64_t s_lastcheck; /* Time of last check */ |
| uint32_t s_creator_os; /* OS */ |
| uint32_t s_feature_compat; /* Compatible feature set */ |
| /*20*/ uint32_t s_feature_incompat; /* Incompatible feature set */ |
| uint32_t s_feature_ro_compat; /* Readonly-compatible feature set */ |
| uint64_t s_root_blkno; /* Offset, in blocks, of root directory |
| dinode */ |
| /*30*/ uint64_t s_system_dir_blkno; /* Offset, in blocks, of system |
| directory dinode */ |
| uint32_t s_blocksize_bits; /* Blocksize for this fs */ |
| uint32_t s_clustersize_bits; /* Clustersize for this fs */ |
| /*40*/ uint16_t s_max_slots; /* Max number of simultaneous mounts |
| before tunefs required */ |
| uint16_t s_reserved1; |
| uint32_t s_reserved2; |
| uint64_t s_first_cluster_group; /* Block offset of 1st cluster |
| * group header */ |
| /*50*/ uint8_t s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */ |
| /*90*/ uint8_t s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */ |
| /*A0*/ |
| } __attribute__ ((packed)); |
| |
| /* |
| * On disk inode for OCFS2 |
| */ |
| struct ocfs2_dinode { |
| /*00*/ uint8_t i_signature[8]; /* Signature for validation */ |
| uint32_t i_generation; /* Generation number */ |
| uint16_t i_suballoc_slot; /* Slot suballocator this inode |
| belongs to */ |
| int16_t i_suballoc_bit; /* Bit offset in suballocator |
| block group */ |
| /*10*/ uint32_t i_reserved0; |
| uint32_t i_clusters; /* Cluster count */ |
| uint32_t i_uid; /* Owner UID */ |
| uint32_t i_gid; /* Owning GID */ |
| /*20*/ uint64_t i_size; /* Size in bytes */ |
| uint16_t i_mode; /* File mode */ |
| uint16_t i_links_count; /* Links count */ |
| uint32_t i_flags; /* File flags */ |
| /*30*/ uint64_t i_atime; /* Access time */ |
| uint64_t i_ctime; /* Creation time */ |
| /*40*/ uint64_t i_mtime; /* Modification time */ |
| uint64_t i_dtime; /* Deletion time */ |
| /*50*/ uint64_t i_blkno; /* Offset on disk, in blocks */ |
| uint64_t i_last_eb_blk; /* Pointer to last extent |
| block */ |
| /*60*/ uint32_t i_fs_generation; /* Generation per fs-instance */ |
| uint32_t i_atime_nsec; |
| uint32_t i_ctime_nsec; |
| uint32_t i_mtime_nsec; |
| uint32_t i_attr; |
| uint16_t i_orphaned_slot; /* Only valid when OCFS2_ORPHANED_FL |
| was set in i_flags */ |
| uint16_t i_reserved1; |
| /*70*/ uint64_t i_reserved2[8]; |
| /*B8*/ uint64_t i_pad1; |
| uint64_t i_rdev; /* Device number */ |
| uint32_t i_used; /* Bits (ie, clusters) used */ |
| uint32_t i_total; /* Total bits (clusters) |
| available */ |
| uint32_t ij_flags; /* Mounted, version, etc. */ |
| uint32_t ij_pad; |
| /*C0*/ struct ocfs2_super_block i_super; |
| /* Actual on-disk size is one block */ |
| } __attribute__ ((packed)); |
| |
| #endif /* _OCFS2_FS_H */ |