1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _BCACHEFS_LRU_H |
3 | #define _BCACHEFS_LRU_H |
4 | |
5 | #define LRU_TIME_BITS 48 |
6 | #define LRU_TIME_MAX ((1ULL << LRU_TIME_BITS) - 1) |
7 | |
8 | static inline u64 lru_pos_id(struct bpos pos) |
9 | { |
10 | return pos.inode >> LRU_TIME_BITS; |
11 | } |
12 | |
13 | static inline u64 lru_pos_time(struct bpos pos) |
14 | { |
15 | return pos.inode & ~(~0ULL << LRU_TIME_BITS); |
16 | } |
17 | |
18 | static inline struct bpos lru_pos(u16 lru_id, u64 dev_bucket, u64 time) |
19 | { |
20 | struct bpos pos = POS(((u64) lru_id << LRU_TIME_BITS)|time, dev_bucket); |
21 | |
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); |
26 | |
27 | return pos; |
28 | } |
29 | |
30 | #define BCH_LRU_TYPES() \ |
31 | x(read) \ |
32 | x(fragmentation) |
33 | |
34 | enum bch_lru_type { |
35 | #define x(n) BCH_LRU_##n, |
36 | BCH_LRU_TYPES() |
37 | #undef x |
38 | }; |
39 | |
40 | #define BCH_LRU_FRAGMENTATION_START ((1U << 16) - 1) |
41 | |
42 | static inline enum bch_lru_type lru_type(struct bkey_s_c l) |
43 | { |
44 | u16 lru_id = l.k->p.inode >> 48; |
45 | |
46 | if (lru_id == BCH_LRU_FRAGMENTATION_START) |
47 | return BCH_LRU_fragmentation; |
48 | return BCH_LRU_read; |
49 | } |
50 | |
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); |
54 | |
55 | void bch2_lru_pos_to_text(struct printbuf *, struct bpos); |
56 | |
57 | #define bch2_bkey_ops_lru ((struct bkey_ops) { \ |
58 | .key_invalid = bch2_lru_invalid, \ |
59 | .val_to_text = bch2_lru_to_text, \ |
60 | .min_val_size = 8, \ |
61 | }) |
62 | |
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); |
66 | |
67 | int bch2_check_lrus(struct bch_fs *); |
68 | |
69 | #endif /* _BCACHEFS_LRU_H */ |
70 | |