1 files changed, 26 insertions, 1 deletions

diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index 0b82e8044325..fbcb5934a081 100644
--- a/fs/ocfs2/alloc.h
+++ b/fs/ocfs2/alloc.h
@@ -31,7 +31,8 @@ int ocfs2_insert_extent(struct ocfs2_super *osb,
                         handle_t *handle,
                         struct inode *inode,
                         struct buffer_head *fe_bh,
-                        u64 blkno,
+                        u32 cpos,
+                        u64 start_blk,
                         u32 new_clusters,
                         struct ocfs2_alloc_context *meta_ac);
 int ocfs2_num_free_extents(struct ocfs2_super *osb,
@@ -70,6 +71,8 @@ struct ocfs2_truncate_context {
         struct buffer_head *tc_last_eb_bh;
 };
 
+int ocfs2_zero_tail_for_truncate(struct inode *inode, handle_t *handle,
+                                 u64 new_i_size);
 int ocfs2_prepare_truncate(struct ocfs2_super *osb,
                            struct inode *inode,
                            struct buffer_head *fe_bh,
@@ -79,4 +82,26 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
                           struct buffer_head *fe_bh,
                           struct ocfs2_truncate_context *tc);
 
+int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el,
+                    u32 cpos, struct buffer_head **leaf_bh);
+
+/*
+ * Helper function to look at the # of clusters in an extent record.
+ */
+static inline unsigned int ocfs2_rec_clusters(struct ocfs2_extent_list *el,
+                                              struct ocfs2_extent_rec *rec)
+{
+        /*
+         * Cluster count in extent records is slightly different
+         * between interior nodes and leaf nodes. This is to support
+         * unwritten extents which need a flags field in leaf node
+         * records, thus shrinking the available space for a clusters
+         * field.
+         */
+        if (el->l_tree_depth)
+                return le32_to_cpu(rec->e_int_clusters);
+        else
+                return le16_to_cpu(rec->e_leaf_clusters);
+}
+
 #endif /* OCFS2_ALLOC_H */