Commit e73a819d authored by Tao Ma's avatar Tao Ma Committed by Joel Becker
Browse files

ocfs2: Add support for incrementing refcount in the tree. 



    Given a physical cpos and length, increment the refcount
in the tree. If the extent has not been seen before, a refcount
record is created for it. Refcount records may be merged or
split by this operation.

Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
parent e2e9f608

fs/ocfs2/extent_map.c

+8 −7
Original line number Diff line number Diff line
@@ -353,7 +353,7 @@ static int ocfs2_search_for_hole_index(struct ocfs2_extent_list *el, 
 * eb_bh is NULL. Otherwise, eb_bh should point to the extent block

 * containing el.

 */

static int ocfs2_figure_hole_clusters(struct inode *inode,

int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci,

			       struct ocfs2_extent_list *el,

			       struct buffer_head *eb_bh,

			       u32 v_cluster,
@@ -375,7 +375,7 @@ static int ocfs2_figure_hole_clusters(struct inode *inode, 
		if (le64_to_cpu(eb->h_next_leaf_blk) == 0ULL)

			goto no_more_extents;



		ret = ocfs2_read_extent_block(INODE_CACHE(inode),

		ret = ocfs2_read_extent_block(ci,

					      le64_to_cpu(eb->h_next_leaf_blk),

					      &next_eb_bh);

		if (ret) {
@@ -456,7 +456,8 @@ static int ocfs2_get_clusters_nocache(struct inode *inode, 
		 * field.

		 */

		if (hole_len) {

			ret = ocfs2_figure_hole_clusters(inode, el, eb_bh,

			ret = ocfs2_figure_hole_clusters(INODE_CACHE(inode),

							 el, eb_bh,

							 v_cluster, &len);

			if (ret) {

				mlog_errno(ret);

fs/ocfs2/extent_map.h

+5 −0
Original line number Diff line number Diff line
@@ -61,6 +61,11 @@ int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr, 
			   struct buffer_head *bhs[], int flags,

			   int (*validate)(struct super_block *sb,

					   struct buffer_head *bh));

int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci,

			       struct ocfs2_extent_list *el,

			       struct buffer_head *eb_bh,

			       u32 v_cluster,

			       u32 *num_clusters);

static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block,

					struct buffer_head **bh,

					int (*validate)(struct super_block *sb,

fs/ocfs2/ocfs2_fs.h

+7 −0
Original line number Diff line number Diff line
@@ -916,6 +916,7 @@ struct ocfs2_refcount_rec { 
	__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)
@@ -1394,6 +1395,12 @@ static inline u16 ocfs2_refcount_recs_per_rb(struct super_block *sb) 


	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)

{

fs/ocfs2/refcounttree.c

+1053 −0

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