1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_LRU_H
3 #define _BCACHEFS_LRU_H
4
5 static inline u64 lru_pos_id(struct bpos pos)
6 {
7 return pos.inode >> LRU_TIME_BITS;
8 }
9
10 static inline u64 lru_pos_time(struct bpos pos)
11 {
12 return pos.inode & ~(~0ULL << LRU_TIME_BITS);
13 }
14
15 static inline struct bpos lru_pos(u16 lru_id, u64 dev_bucket, u64 time)
16 {
17 struct bpos pos = POS(((u64) lru_id << LRU_TIME_BITS)|time, dev_bucket);
18
19 EBUG_ON(time > LRU_TIME_MAX);
20 EBUG_ON(lru_pos_id(pos) != lru_id);
21 EBUG_ON(lru_pos_time(pos) != time);
22 EBUG_ON(pos.offset != dev_bucket);
23
24 return pos;
25 }
26
27 static inline enum bch_lru_type lru_type(struct bkey_s_c l)
28 {
29 u16 lru_id = l.k->p.inode >> 48;
30
31 if (lru_id == BCH_LRU_FRAGMENTATION_START)
32 return BCH_LRU_fragmentation;
33 return BCH_LRU_read;
34 }
35
36 int bch2_lru_invalid(struct bch_fs *, struct bkey_s_c,
37 enum bch_validate_flags, struct printbuf *);
38 void bch2_lru_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
39
40 void bch2_lru_pos_to_text(struct printbuf *, struct bpos);
41
42 #define bch2_bkey_ops_lru ((struct bkey_ops) { \
43 .key_invalid = bch2_lru_invalid, \
44 .val_to_text = bch2_lru_to_text, \
45 .min_val_size = 8, \
46 })
47
48 int bch2_lru_del(struct btree_trans *, u16, u64, u64);
49 int bch2_lru_set(struct btree_trans *, u16, u64, u64);
50 int bch2_lru_change(struct btree_trans *, u16, u64, u64, u64);
51
52 struct bkey_buf;
53 int bch2_lru_check_set(struct btree_trans *, u16, u64, struct bkey_s_c, struct bkey_buf *);
54
55 int bch2_check_lrus(struct bch_fs *);
56
57 #endif /* _BCACHEFS_LRU_H */
58
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