Commit 721f69c4 authored by Tao Ma's avatar Tao Ma Committed by Joel Becker

ocfs2: Define refcount tree structure.

Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
parent 5e404e9e
...@@ -68,6 +68,7 @@ ...@@ -68,6 +68,7 @@
#define OCFS2_DIR_TRAILER_SIGNATURE "DIRTRL1" #define OCFS2_DIR_TRAILER_SIGNATURE "DIRTRL1"
#define OCFS2_DX_ROOT_SIGNATURE "DXDIR01" #define OCFS2_DX_ROOT_SIGNATURE "DXDIR01"
#define OCFS2_DX_LEAF_SIGNATURE "DXLEAF1" #define OCFS2_DX_LEAF_SIGNATURE "DXLEAF1"
#define OCFS2_REFCOUNT_BLOCK_SIGNATURE "REFCNT1"
/* Compatibility flags */ /* Compatibility flags */
#define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \ #define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \
...@@ -160,6 +161,9 @@ ...@@ -160,6 +161,9 @@
/* Metadata checksum and error correction */ /* Metadata checksum and error correction */
#define OCFS2_FEATURE_INCOMPAT_META_ECC 0x0800 #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 * backup superblock flag is used to indicate that this volume
* has backup superblocks. * has backup superblocks.
...@@ -223,6 +227,7 @@ ...@@ -223,6 +227,7 @@
#define OCFS2_HAS_XATTR_FL (0x0002) #define OCFS2_HAS_XATTR_FL (0x0002)
#define OCFS2_INLINE_XATTR_FL (0x0004) #define OCFS2_INLINE_XATTR_FL (0x0004)
#define OCFS2_INDEXED_DIR_FL (0x0008) #define OCFS2_INDEXED_DIR_FL (0x0008)
#define OCFS2_HAS_REFCOUNT_FL (0x0010)
/* Inode attributes, keep in sync with EXT2 */ /* Inode attributes, keep in sync with EXT2 */
#define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */ #define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */
...@@ -241,8 +246,11 @@ ...@@ -241,8 +246,11 @@
/* /*
* Extent record flags (e_node.leaf.flags) * Extent record flags (e_node.leaf.flags)
*/ */
#define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but #define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but
* unwritten */ * unwritten */
#define OCFS2_EXT_REFCOUNTED (0x02) /* Extent is reference
* counted in an associated
* refcount tree */
/* /*
* ioctl commands * ioctl commands
...@@ -717,7 +725,8 @@ struct ocfs2_dinode { ...@@ -717,7 +725,8 @@ struct ocfs2_dinode {
__le64 i_xattr_loc; __le64 i_xattr_loc;
/*80*/ struct ocfs2_block_check i_check; /* Error checking */ /*80*/ struct ocfs2_block_check i_check; /* Error checking */
/*88*/ __le64 i_dx_root; /* Pointer to dir index root block */ /*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 { /*B8*/ union {
__le64 i_pad1; /* Generic way to refer to this __le64 i_pad1; /* Generic way to refer to this
64bit union */ 64bit union */
...@@ -901,6 +910,59 @@ struct ocfs2_group_desc ...@@ -901,6 +910,59 @@ struct ocfs2_group_desc
/*40*/ __u8 bg_bitmap[0]; /*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_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. * On disk extended attribute structure for OCFS2.
*/ */
...@@ -1312,6 +1374,26 @@ static inline u16 ocfs2_xattr_recs_per_xb(struct super_block *sb) ...@@ -1312,6 +1374,26 @@ static inline u16 ocfs2_xattr_recs_per_xb(struct super_block *sb)
return size / sizeof(struct ocfs2_extent_rec); 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);
}
#else #else
static inline int ocfs2_fast_symlink_chars(int blocksize) static inline int ocfs2_fast_symlink_chars(int blocksize)
{ {
......
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