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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_LRU_H
#define _BCACHEFS_LRU_H
#define LRU_TIME_BITS 48
#define LRU_TIME_MAX ((1ULL << LRU_TIME_BITS) - 1)
static inline u64 lru_pos_id(struct bpos pos)
{
return pos.inode >> LRU_TIME_BITS;
}
static inline u64 lru_pos_time(struct bpos pos)
{
return pos.inode & ~(~0ULL << LRU_TIME_BITS);
}
static inline struct bpos lru_pos(u16 lru_id, u64 dev_bucket, u64 time)
{
struct bpos pos = POS(((u64) lru_id << LRU_TIME_BITS)|time, dev_bucket);
EBUG_ON(time > LRU_TIME_MAX);
EBUG_ON(lru_pos_id(pos) != lru_id);
EBUG_ON(lru_pos_time(pos) != time);
EBUG_ON(pos.offset != dev_bucket);
return pos;
}
#define BCH_LRU_TYPES() \
x(read) \
x(fragmentation)
enum bch_lru_type {
#define x(n) BCH_LRU_##n,
BCH_LRU_TYPES()
#undef x
};
#define BCH_LRU_FRAGMENTATION_START ((1U << 16) - 1)
static inline enum bch_lru_type lru_type(struct bkey_s_c l)
{
u16 lru_id = l.k->p.inode >> 48;
if (lru_id == BCH_LRU_FRAGMENTATION_START)
return BCH_LRU_fragmentation;
return BCH_LRU_read;
}
int bch2_lru_invalid(struct bch_fs *, struct bkey_s_c,
enum bkey_invalid_flags, struct printbuf *);
void bch2_lru_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
void bch2_lru_pos_to_text(struct printbuf *, struct bpos);
#define bch2_bkey_ops_lru ((struct bkey_ops) { \
.key_invalid = bch2_lru_invalid, \
.val_to_text = bch2_lru_to_text, \
.min_val_size = 8, \
})
int bch2_lru_del(struct btree_trans *, u16, u64, u64);
int bch2_lru_set(struct btree_trans *, u16, u64, u64);
int bch2_lru_change(struct btree_trans *, u16, u64, u64, u64);
int bch2_check_lrus(struct bch_fs *);
#endif /* _BCACHEFS_LRU_H */
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