ocfs2: Add a name indexed b-tree to directory inodes

[linux-block.git] / fs / ocfs2 / dir.h

diff --git a/fs/ocfs2/dir.h b/fs/ocfs2/dir.h
index 505d3af9bba5cbaeb41411f46e40f123f478f220..d273aaef2ec2c40f0ac8223b9fd74a82a1342eb7 100644 (file)
--- a/fs/ocfs2/dir.h
+++ b/fs/ocfs2/dir.h
@@ -26,9 +26,21 @@
 #ifndef OCFS2_DIR_H
 #define OCFS2_DIR_H
 
+struct ocfs2_dx_hinfo {
+       u32     major_hash;
+       u32     minor_hash;
+};
+
 struct ocfs2_dir_lookup_result {
-       struct buffer_head              *dl_leaf_bh;
-       struct ocfs2_dir_entry          *dl_entry;
+       struct buffer_head              *dl_leaf_bh;    /* Unindexed leaf
+                                                        * block */
+       struct ocfs2_dir_entry          *dl_entry;      /* Target dirent in
+                                                        * unindexed leaf */
+
+       struct buffer_head              *dl_dx_leaf_bh; /* Indexed leaf block */
+       struct ocfs2_dx_entry           *dl_dx_entry;   /* Target dx_entry in
+                                                        * indexed leaf */
+       struct ocfs2_dx_hinfo           dl_hinfo;       /* Name hash results */
 };
 void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
 
@@ -85,7 +97,10 @@ int ocfs2_fill_new_dir(struct ocfs2_super *osb,
                       struct inode *parent,
                       struct inode *inode,
                       struct buffer_head *fe_bh,
-                      struct ocfs2_alloc_context *data_ac);
+                      struct ocfs2_alloc_context *data_ac,
+                      struct ocfs2_alloc_context *meta_ac);
+
+int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh);
 
 struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
                                                            void *data);