gfs2_dirent_find
dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh);
dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh);
if (gfs2_dirent_find(dent, name, NULL) == 0) {
dent = gfs2_dirent_search(&dip->i_inode, filename, gfs2_dirent_find, &bh);