1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_LRU_H
3 #define _BCACHEFS_LRU_H
5 #define LRU_TIME_BITS 48
6 #define LRU_TIME_MAX ((1ULL << LRU_TIME_BITS) - 1)
8 static inline u64 lru_pos_id(struct bpos pos)
10 return pos.inode >> LRU_TIME_BITS;
13 static inline u64 lru_pos_time(struct bpos pos)
15 return pos.inode & ~(~0ULL << LRU_TIME_BITS);
18 static inline struct bpos lru_pos(u16 lru_id, u64 dev_bucket, u64 time)
20 struct bpos pos = POS(((u64) lru_id << LRU_TIME_BITS)|time, dev_bucket);
22 EBUG_ON(time > LRU_TIME_MAX);
23 EBUG_ON(lru_pos_id(pos) != lru_id);
24 EBUG_ON(lru_pos_time(pos) != time);
25 EBUG_ON(pos.offset != dev_bucket);
30 #define BCH_LRU_TYPES() \
35 #define x(n) BCH_LRU_##n,
40 #define BCH_LRU_FRAGMENTATION_START ((1U << 16) - 1)
42 static inline enum bch_lru_type lru_type(struct bkey_s_c l)
44 u16 lru_id = l.k->p.inode >> 48;
46 if (lru_id == BCH_LRU_FRAGMENTATION_START)
47 return BCH_LRU_fragmentation;
51 int bch2_lru_invalid(struct bch_fs *, struct bkey_s_c,
52 enum bkey_invalid_flags, struct printbuf *);
53 void bch2_lru_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
55 void bch2_lru_pos_to_text(struct printbuf *, struct bpos);
57 #define bch2_bkey_ops_lru ((struct bkey_ops) { \
58 .key_invalid = bch2_lru_invalid, \
59 .val_to_text = bch2_lru_to_text, \
63 int bch2_lru_del(struct btree_trans *, u16, u64, u64);
64 int bch2_lru_set(struct btree_trans *, u16, u64, u64);
65 int bch2_lru_change(struct btree_trans *, u16, u64, u64, u64);
67 int bch2_check_lrus(struct bch_fs *);
69 #endif /* _BCACHEFS_LRU_H */