+static void ocfs2_dx_root_set_last_eb_blk(struct ocfs2_extent_tree *et,
+ u64 blkno)
+{
+ struct ocfs2_dx_root_block *dx_root = et->et_object;
+
+ dx_root->dr_last_eb_blk = cpu_to_le64(blkno);
+}
+
+static u64 ocfs2_dx_root_get_last_eb_blk(struct ocfs2_extent_tree *et)
+{
+ struct ocfs2_dx_root_block *dx_root = et->et_object;
+
+ return le64_to_cpu(dx_root->dr_last_eb_blk);
+}
+
+static void ocfs2_dx_root_update_clusters(struct inode *inode,
+ struct ocfs2_extent_tree *et,
+ u32 clusters)
+{
+ struct ocfs2_dx_root_block *dx_root = et->et_object;
+
+ le32_add_cpu(&dx_root->dr_clusters, clusters);
+}
+
+static int ocfs2_dx_root_sanity_check(struct inode *inode,
+ struct ocfs2_extent_tree *et)
+{
+ struct ocfs2_dx_root_block *dx_root = et->et_object;
+
+ BUG_ON(!OCFS2_IS_VALID_DX_ROOT(dx_root));
+
+ return 0;
+}
+
+static void ocfs2_dx_root_fill_root_el(struct ocfs2_extent_tree *et)
+{
+ struct ocfs2_dx_root_block *dx_root = et->et_object;
+
+ et->et_root_el = &dx_root->dr_list;
+}
+
+static struct ocfs2_extent_tree_operations ocfs2_dx_root_et_ops = {
+ .eo_set_last_eb_blk = ocfs2_dx_root_set_last_eb_blk,
+ .eo_get_last_eb_blk = ocfs2_dx_root_get_last_eb_blk,
+ .eo_update_clusters = ocfs2_dx_root_update_clusters,
+ .eo_sanity_check = ocfs2_dx_root_sanity_check,
+ .eo_fill_root_el = ocfs2_dx_root_fill_root_el,
+};
+