diff options
Diffstat (limited to 'fs/ocfs2/ocfs2_fs.h')
| -rw-r--r-- | fs/ocfs2/ocfs2_fs.h | 107 |
1 files changed, 103 insertions, 4 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index 7ab6e9e5e77..e9431e4a5e7 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -68,6 +68,7 @@ #define OCFS2_DIR_TRAILER_SIGNATURE "DIRTRL1" #define OCFS2_DX_ROOT_SIGNATURE "DXDIR01" #define OCFS2_DX_LEAF_SIGNATURE "DXLEAF1" +#define OCFS2_REFCOUNT_BLOCK_SIGNATURE "REFCNT1" /* Compatibility flags */ #define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \ @@ -98,7 +99,8 @@ | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK \ | OCFS2_FEATURE_INCOMPAT_XATTR \ | OCFS2_FEATURE_INCOMPAT_META_ECC \ - | OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) + | OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS \ + | OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) #define OCFS2_FEATURE_RO_COMPAT_SUPP (OCFS2_FEATURE_RO_COMPAT_UNWRITTEN \ | OCFS2_FEATURE_RO_COMPAT_USRQUOTA \ | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA) @@ -160,6 +162,9 @@ /* Metadata checksum and error correction */ #define OCFS2_FEATURE_INCOMPAT_META_ECC 0x0800 +/* Refcount tree support */ +#define OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE 0x1000 + /* * backup superblock flag is used to indicate that this volume * has backup superblocks. @@ -223,6 +228,7 @@ #define OCFS2_HAS_XATTR_FL (0x0002) #define OCFS2_INLINE_XATTR_FL (0x0004) #define OCFS2_INDEXED_DIR_FL (0x0008) +#define OCFS2_HAS_REFCOUNT_FL (0x0010) /* Inode attributes, keep in sync with EXT2 */ #define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */ @@ -241,8 +247,11 @@ /* * Extent record flags (e_node.leaf.flags) */ -#define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but - * unwritten */ +#define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but + * unwritten */ +#define OCFS2_EXT_REFCOUNTED (0x02) /* Extent is reference + * counted in an associated + * refcount tree */ /* * ioctl commands @@ -292,6 +301,15 @@ struct ocfs2_new_group_input { #define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input) #define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input) +/* Used to pass 2 file names to reflink. */ +struct reflink_arguments { + __u64 old_path; + __u64 new_path; + __u64 preserve; +}; +#define OCFS2_IOC_REFLINK _IOW('o', 4, struct reflink_arguments) + + /* * Journal Flags (ocfs2_dinode.id1.journal1.i_flags) */ @@ -717,7 +735,8 @@ struct ocfs2_dinode { __le64 i_xattr_loc; /*80*/ struct ocfs2_block_check i_check; /* Error checking */ /*88*/ __le64 i_dx_root; /* Pointer to dir index root block */ - __le64 i_reserved2[5]; +/*90*/ __le64 i_refcount_loc; + __le64 i_reserved2[4]; /*B8*/ union { __le64 i_pad1; /* Generic way to refer to this 64bit union */ @@ -901,6 +920,60 @@ struct ocfs2_group_desc /*40*/ __u8 bg_bitmap[0]; }; +struct ocfs2_refcount_rec { +/*00*/ __le64 r_cpos; /* Physical offset, in clusters */ + __le32 r_clusters; /* Clusters covered by this extent */ + __le32 r_refcount; /* Reference count of this extent */ +/*10*/ +}; +#define OCFS2_32BIT_POS_MASK (0xffffffffULL) + +#define OCFS2_REFCOUNT_LEAF_FL (0x00000001) +#define OCFS2_REFCOUNT_TREE_FL (0x00000002) + +struct ocfs2_refcount_list { +/*00*/ __le16 rl_count; /* Maximum number of entries possible + in rl_records */ + __le16 rl_used; /* Current number of used records */ + __le32 rl_reserved2; + __le64 rl_reserved1; /* Pad to sizeof(ocfs2_refcount_record) */ +/*10*/ struct ocfs2_refcount_rec rl_recs[0]; /* Refcount records */ +}; + + +struct ocfs2_refcount_block { +/*00*/ __u8 rf_signature[8]; /* Signature for verification */ + __le16 rf_suballoc_slot; /* Slot suballocator this block + belongs to */ + __le16 rf_suballoc_bit; /* Bit offset in suballocator + block group */ + __le32 rf_fs_generation; /* Must match superblock */ +/*10*/ __le64 rf_blkno; /* Offset on disk, in blocks */ + __le64 rf_parent; /* Parent block, only valid if + OCFS2_REFCOUNT_LEAF_FL is set in + rf_flags */ +/*20*/ struct ocfs2_block_check rf_check; /* Error checking */ + __le64 rf_last_eb_blk; /* Pointer to last extent block */ +/*30*/ __le32 rf_count; /* Number of inodes sharing this + refcount tree */ + __le32 rf_flags; /* See the flags above */ + __le32 rf_clusters; /* clusters covered by refcount tree. */ + __le32 rf_cpos; /* cluster offset in refcount tree.*/ +/*40*/ __le32 rf_generation; /* generation number. all be the same + * for the same refcount tree. */ + __le32 rf_reserved0; + __le64 rf_reserved1[7]; +/*80*/ union { + struct ocfs2_refcount_list rf_records; /* List of refcount + records */ + struct ocfs2_extent_list rf_list; /* Extent record list, + only valid if + OCFS2_REFCOUNT_TREE_FL + is set in rf_flags */ + }; +/* Actual on-disk size is one block */ +}; + /* * On disk extended attribute structure for OCFS2. */ @@ -1312,6 +1385,32 @@ static inline u16 ocfs2_xattr_recs_per_xb(struct super_block *sb) return size / sizeof(struct ocfs2_extent_rec); } + +static inline u16 ocfs2_extent_recs_per_rb(struct super_block *sb) +{ + int size; + + size = sb->s_blocksize - + offsetof(struct ocfs2_refcount_block, rf_list.l_recs); + + return size / sizeof(struct ocfs2_extent_rec); +} + +static inline u16 ocfs2_refcount_recs_per_rb(struct super_block *sb) +{ + int size; + + size = sb->s_blocksize - + offsetof(struct ocfs2_refcount_block, rf_records.rl_recs); + + return size / sizeof(struct ocfs2_refcount_rec); +} + +static inline u32 +ocfs2_get_ref_rec_low_cpos(const struct ocfs2_refcount_rec *rec) +{ + return le64_to_cpu(rec->r_cpos) & OCFS2_32BIT_POS_MASK; +} #else static inline int ocfs2_fast_symlink_chars(int blocksize) { |