ocfs2: Add reflink support for xattr.

Signed-off-by: Tao Ma <tao.ma@oracle.com>

fs/ocfs2/refcounttree.c

@@ -1894,7 +1894,7 @@ out:
 	return ret;
 }
 
-static int __ocfs2_increase_refcount(handle_t *handle,
+int ocfs2_increase_refcount(handle_t *handle,
 			    struct ocfs2_caching_info *ci,
 			    struct buffer_head *ref_root_bh,
 			    u64 cpos, u32 len,
@@ -3631,7 +3631,7 @@ int ocfs2_add_refcount_flag(struct inode *inode,
 		goto out_commit;
 	}
 
-	ret = __ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
+	ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
 				      p_cluster, num_clusters,
 				      meta_ac, dealloc);
 	if (ret) {
@@ -3822,7 +3822,7 @@ static int ocfs2_add_refcounted_extent(struct inode *inode,
 		goto out_commit;
 	}
 
-	ret = __ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
+	ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
 				      p_cluster, num_clusters,
 				      meta_ac, dealloc);
 	if (ret)

fs/ocfs2/refcounttree.h

@@ -93,4 +93,10 @@ int ocfs2_add_refcount_flag(struct inode *inode,
 int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh);
 int ocfs2_try_remove_refcount_tree(struct inode *inode,
 				   struct buffer_head *di_bh);
+int ocfs2_increase_refcount(handle_t *handle,
+			    struct ocfs2_caching_info *ci,
+			    struct buffer_head *ref_root_bh,
+			    u64 cpos, u32 len,
+			    struct ocfs2_alloc_context *meta_ac,
+			    struct ocfs2_cached_dealloc_ctxt *dealloc);
 #endif /* OCFS2_REFCOUNTTREE_H */

fs/ocfs2/xattr.h

@@ -90,4 +90,8 @@ int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
 				     struct ocfs2_caching_info *ref_ci,
 				     struct buffer_head *ref_root_bh,
 				     struct ocfs2_cached_dealloc_ctxt *dealloc);
+int ocfs2_reflink_xattrs(struct inode *old_inode,
+			 struct buffer_head *old_bh,
+			 struct inode *new_inode,
+			 struct buffer_head *new_bh);
 #endif /* OCFS2_XATTR_H */