nilfs_dir_detach
int nilfs_dir_detach(struct nilfs_mount *ump, struct nilfs_node *dir_node, struct nilfs_node *nilfs_node, struct componentname *cnp);
nilfs_dir_detach(nilfs_node->ump, dir_node, nilfs_node, cnp);
nilfs_dir_detach(tdnode->ump, tdnode, tnode, tcnp);
error = nilfs_dir_detach(tdnode->ump, fdnode, fnode, fcnp);
nilfs_dir_detach(tdnode->ump, tdnode, fnode, tcnp);
error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp);
error = nilfs_dir_detach(ump, dir_node, nilfs_node, cnp);