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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _BCACHEFS_LRU_H | |
3 | #define _BCACHEFS_LRU_H | |
4 | ||
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5 | #define LRU_TIME_BITS 48 |
6 | #define LRU_TIME_MAX ((1ULL << LRU_TIME_BITS) - 1) | |
7 | ||
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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 | ||
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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 | ||
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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 | ||
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51 | int bch2_lru_invalid(const struct bch_fs *, struct bkey_s_c, |
52 | enum bkey_invalid_flags, struct printbuf *); | |
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53 | void bch2_lru_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); |
54 | ||
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55 | void bch2_lru_pos_to_text(struct printbuf *, struct bpos); |
56 | ||
a1019576 | 57 | #define bch2_bkey_ops_lru ((struct bkey_ops) { \ |
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58 | .key_invalid = bch2_lru_invalid, \ |
59 | .val_to_text = bch2_lru_to_text, \ | |
174f930b | 60 | .min_val_size = 8, \ |
a1019576 | 61 | }) |
d326ab2f | 62 | |
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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); | |
d326ab2f | 66 | |
d8a161ad | 67 | int bch2_check_lrus(struct bch_fs *); |
5add07d5 | 68 | |
d326ab2f | 69 | #endif /* _BCACHEFS_LRU_H */ |