- struct bch_dev *ca;
- struct bucket *g;
- struct bkey_alloc_unpacked ret;
-
- percpu_down_read(&c->mark_lock);
- ca = bch_dev_bkey_exists(c, iter->pos.inode);
- g = bucket(ca, iter->pos.offset);
- ret = (struct bkey_alloc_unpacked) {
- .dev = iter->pos.inode,
- .bucket = iter->pos.offset,
- .gen = g->mark.gen,
- .oldest_gen = g->oldest_gen,
- .data_type = g->mark.data_type,
- .dirty_sectors = g->mark.dirty_sectors,
- .cached_sectors = g->mark.cached_sectors,
- .read_time = g->io_time[READ],
- .write_time = g->io_time[WRITE],
- .stripe = g->stripe,
- .stripe_redundancy = g->stripe_redundancy,
- };
- percpu_up_read(&c->mark_lock);
+ return a.gen - a.oldest_gen;
+}
+
+static inline enum bch_data_type __alloc_data_type(u32 dirty_sectors,
+ u32 cached_sectors,
+ u32 stripe,
+ struct bch_alloc_v4 a,
+ enum bch_data_type data_type)
+{
+ if (stripe)
+ return data_type == BCH_DATA_parity ? data_type : BCH_DATA_stripe;
+ if (dirty_sectors)
+ return data_type;
+ if (cached_sectors)
+ return BCH_DATA_cached;
+ if (BCH_ALLOC_V4_NEED_DISCARD(&a))
+ return BCH_DATA_need_discard;
+ if (alloc_gc_gen(a) >= BUCKET_GC_GEN_MAX)
+ return BCH_DATA_need_gc_gens;
+ return BCH_DATA_free;
+}
+
+static inline enum bch_data_type alloc_data_type(struct bch_alloc_v4 a,
+ enum bch_data_type data_type)
+{
+ return __alloc_data_type(a.dirty_sectors, a.cached_sectors,
+ a.stripe, a, data_type);
+}
+
+static inline enum bch_data_type bucket_data_type(enum bch_data_type data_type)
+{
+ return data_type == BCH_DATA_stripe ? BCH_DATA_user : data_type;
+}
+
+static inline unsigned bch2_bucket_sectors(struct bch_alloc_v4 a)
+{
+ return a.dirty_sectors + a.cached_sectors;
+}
+
+static inline unsigned bch2_bucket_sectors_dirty(struct bch_alloc_v4 a)
+{
+ return a.dirty_sectors;
+}
+
+static inline unsigned bch2_bucket_sectors_fragmented(struct bch_dev *ca,
+ struct bch_alloc_v4 a)
+{
+ int d = bch2_bucket_sectors_dirty(a);
+
+ return d ? max(0, ca->mi.bucket_size - d) : 0;
+}
+
+static inline u64 alloc_lru_idx_read(struct bch_alloc_v4 a)
+{
+ return a.data_type == BCH_DATA_cached ? a.io_time[READ] : 0;
+}
+
+#define DATA_TYPES_MOVABLE \
+ ((1U << BCH_DATA_btree)| \
+ (1U << BCH_DATA_user)| \
+ (1U << BCH_DATA_stripe))
+
+static inline bool data_type_movable(enum bch_data_type type)
+{
+ return (1U << type) & DATA_TYPES_MOVABLE;
+}
+
+static inline u64 alloc_lru_idx_fragmentation(struct bch_alloc_v4 a,
+ struct bch_dev *ca)
+{
+ if (!data_type_movable(a.data_type) ||
+ !bch2_bucket_sectors_fragmented(ca, a))
+ return 0;
+
+ u64 d = bch2_bucket_sectors_dirty(a);
+ return div_u64(d * (1ULL << 31), ca->mi.bucket_size);
+}
+
+static inline u64 alloc_freespace_genbits(struct bch_alloc_v4 a)
+{
+ return ((u64) alloc_gc_gen(a) >> 4) << 56;
+}
+
+static inline struct bpos alloc_freespace_pos(struct bpos pos, struct bch_alloc_v4 a)
+{
+ pos.offset |= alloc_freespace_genbits(a);
+ return pos;
+}
+
+static inline unsigned alloc_v4_u64s(const struct bch_alloc_v4 *a)
+{
+ unsigned ret = (BCH_ALLOC_V4_BACKPOINTERS_START(a) ?:
+ BCH_ALLOC_V4_U64s_V0) +
+ BCH_ALLOC_V4_NR_BACKPOINTERS(a) *
+ (sizeof(struct bch_backpointer) / sizeof(u64));
+
+ BUG_ON(ret > U8_MAX - BKEY_U64s);
+ return ret;
+}
+
+static inline void set_alloc_v4_u64s(struct bkey_i_alloc_v4 *a)
+{
+ set_bkey_val_u64s(&a->k, alloc_v4_u64s(&a->v));
+}
+
+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;