+struct bkey_i_alloc_v4 *
+bch2_trans_start_alloc_update(struct btree_trans *, struct btree_iter *, struct bpos);
+
+void __bch2_alloc_to_v4(struct bkey_s_c, struct bch_alloc_v4 *);
+
+static inline const struct bch_alloc_v4 *bch2_alloc_to_v4(struct bkey_s_c k, struct bch_alloc_v4 *convert)
+{
+ const struct bch_alloc_v4 *ret;
+
+ if (unlikely(k.k->type != KEY_TYPE_alloc_v4))
+ goto slowpath;
+
+ ret = bkey_s_c_to_alloc_v4(k).v;
+ if (BCH_ALLOC_V4_BACKPOINTERS_START(ret) != BCH_ALLOC_V4_U64s)
+ goto slowpath;
+
+ return ret;
+slowpath:
+ __bch2_alloc_to_v4(k, convert);
+ return convert;
+}
+
+struct bkey_i_alloc_v4 *bch2_alloc_to_v4_mut(struct btree_trans *, struct bkey_s_c);
+
+int bch2_bucket_io_time_reset(struct btree_trans *, unsigned, size_t, int);
+
+int bch2_alloc_v1_invalid(const struct bch_fs *, struct bkey_s_c, int, struct printbuf *);
+int bch2_alloc_v2_invalid(const struct bch_fs *, struct bkey_s_c, int, struct printbuf *);
+int bch2_alloc_v3_invalid(const struct bch_fs *, struct bkey_s_c, int, struct printbuf *);
+int bch2_alloc_v4_invalid(const struct bch_fs *, struct bkey_s_c, int, struct printbuf *);
+void bch2_alloc_v4_swab(struct bkey_s);