int bch2_dirent_create_snapshot(struct btree_trans *, u64, u32,
			const struct bch_hash_info *, u8,
			const struct qstr *, u64, u64 *,
			bch_str_hash_flags_t)
int bch2_dirent_create_snapshot(struct btree_trans *, u32, u64, u32,
			const struct bch_hash_info *, u8,
			const struct qstr *, u64, u64 *,
			bch_str_hash_flags_t)