[Ocfs2-tools-devel] [PATCH 07/50] libocfs2: export tree path functions to extent_tree.h

[Tao Ma]

Although we have already make our b-tree operation generic,
the basic structrue ocfs2_path which is used to iterate one
b-tree branch is still static and limited to only used in
extent_tree.c. As refcount tree need them, export them out.

Signed-off-by: Tao Ma <tao.ma at oracle.com>
---
 libocfs2/extent_tree.c |   36 ++++--------------------------------
 libocfs2/extent_tree.h |   32 ++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 32 deletions(-)

diff --git a/libocfs2/extent_tree.c b/libocfs2/extent_tree.c
index 783d798..ae02c7a 100644
--- a/libocfs2/extent_tree.c
+++ b/libocfs2/extent_tree.c
@@ -107,34 +107,6 @@ static inline void ocfs2_et_update_clusters(struct ocfs2_extent_tree *et,
 	return et->et_ops->eo_update_clusters(et, clusters);
 }
 
-/*
- * Structures which describe a path through a btree, and functions to
- * manipulate them.
- *
- * The idea here is to be as generic as possible with the tree
- * manipulation code.
- */
-struct ocfs2_path_item {
-	uint64_t			blkno;
-	char				*buf;
-	struct ocfs2_extent_list	*el;
-};
-
-#define OCFS2_MAX_PATH_DEPTH	5
-
-struct ocfs2_path {
-	int			p_tree_depth;
-	struct ocfs2_path_item	p_node[OCFS2_MAX_PATH_DEPTH];
-};
-
-#define path_root_blkno(_path) ((_path)->p_node[0].blkno)
-#define path_root_buf(_path) ((_path)->p_node[0].buf)
-#define path_root_el(_path) ((_path)->p_node[0].el)
-#define path_leaf_blkno(_path) ((_path)->p_node[(_path)->p_tree_depth].blkno)
-#define path_leaf_buf(_path) ((_path)->p_node[(_path)->p_tree_depth].buf)
-#define path_leaf_el(_path) ((_path)->p_node[(_path)->p_tree_depth].el)
-#define path_num_items(_path) ((_path)->p_tree_depth + 1)
-
 struct insert_ctxt {
 	ocfs2_filesys *fs;
 	struct ocfs2_extent_tree *et;
@@ -175,7 +147,7 @@ static void ocfs2_reinit_path(struct ocfs2_path *path, int keep_root)
 	path->p_tree_depth = depth;
 }
 
-static void ocfs2_free_path(struct ocfs2_path *path)
+void ocfs2_free_path(struct ocfs2_path *path)
 {
 	/* We don't free the root because often in libocfs2 the root is a
 	 * shared buffer such as the inode.  Caller must be responsible for
@@ -299,7 +271,7 @@ static struct ocfs2_path *ocfs2_new_path_from_path(struct ocfs2_path *path)
 			      path_root_blkno(path));
 }
 
-static struct ocfs2_path *ocfs2_new_path_from_et(struct ocfs2_extent_tree *et)
+struct ocfs2_path *ocfs2_new_path_from_et(struct ocfs2_extent_tree *et)
 {
 	return ocfs2_new_path(et->et_root_buf, et->et_root_el,
 			      et->et_root_blkno);
@@ -1049,8 +1021,8 @@ static errcode_t find_path_ins(void *data, char *eb)
 	return 0;
 }
 
-static int ocfs2_find_path(ocfs2_filesys *fs, struct ocfs2_path *path,
-			   uint32_t cpos)
+int ocfs2_find_path(ocfs2_filesys *fs, struct ocfs2_path *path,
+		    uint32_t cpos)
 {
 	struct find_path_data data;
 
diff --git a/libocfs2/extent_tree.h b/libocfs2/extent_tree.h
index 4e6e091..62e8b50 100644
--- a/libocfs2/extent_tree.h
+++ b/libocfs2/extent_tree.h
@@ -109,3 +109,35 @@ int ocfs2_change_extent_flag(ocfs2_filesys *fs,
 int ocfs2_remove_extent(ocfs2_filesys *fs,
 			struct ocfs2_extent_tree *et,
 			uint32_t cpos, uint32_t len);
+/*
+ * Structures which describe a path through a btree, and functions to
+ * manipulate them.
+ *
+ * The idea here is to be as generic as possible with the tree
+ * manipulation code.
+ */
+struct ocfs2_path_item {
+	uint64_t			blkno;
+	char				*buf;
+	struct ocfs2_extent_list	*el;
+};
+
+#define OCFS2_MAX_PATH_DEPTH	5
+
+struct ocfs2_path {
+	int			p_tree_depth;
+	struct ocfs2_path_item	p_node[OCFS2_MAX_PATH_DEPTH];
+};
+
+#define path_root_blkno(_path) ((_path)->p_node[0].blkno)
+#define path_root_buf(_path) ((_path)->p_node[0].buf)
+#define path_root_el(_path) ((_path)->p_node[0].el)
+#define path_leaf_blkno(_path) ((_path)->p_node[(_path)->p_tree_depth].blkno)
+#define path_leaf_buf(_path) ((_path)->p_node[(_path)->p_tree_depth].buf)
+#define path_leaf_el(_path) ((_path)->p_node[(_path)->p_tree_depth].el)
+#define path_num_items(_path) ((_path)->p_tree_depth + 1)
+
+struct ocfs2_path *ocfs2_new_path_from_et(struct ocfs2_extent_tree *et);
+int ocfs2_find_path(ocfs2_filesys *fs, struct ocfs2_path *path,
+		    uint32_t cpos);
+void ocfs2_free_path(struct ocfs2_path *path);
-- 
1.5.5