tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_LRU_H
3#define _BCACHEFS_LRU_H
4
5static inline u64 lru_pos_id(struct bpos pos)
6{
7 return pos.inode >> LRU_TIME_BITS;
8}
9
10static inline u64 lru_pos_time(struct bpos pos)
11{
12 return pos.inode & ~(~0ULL << LRU_TIME_BITS);
13}
14
15static 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
27static inline enum bch_lru_type lru_type(struct bkey_s_c l)
28{
29 u16 lru_id = l.k->p.inode >> 48;
30
31 switch (lru_id) {
32 case BCH_LRU_BUCKET_FRAGMENTATION:
33 return BCH_LRU_fragmentation;
34 case BCH_LRU_STRIPE_FRAGMENTATION:
35 return BCH_LRU_stripes;
36 default:
37 return BCH_LRU_read;
38 }
39}
40
41int bch2_lru_validate(struct bch_fs *, struct bkey_s_c, struct bkey_validate_context);
42void bch2_lru_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
43
44void bch2_lru_pos_to_text(struct printbuf *, struct bpos);
45
46#define bch2_bkey_ops_lru ((struct bkey_ops) { \
47 .key_validate = bch2_lru_validate, \
48 .val_to_text = bch2_lru_to_text, \
49 .min_val_size = 8, \
50})
51
52int bch2_lru_del(struct btree_trans *, u16, u64, u64);
53int bch2_lru_set(struct btree_trans *, u16, u64, u64);
54int __bch2_lru_change(struct btree_trans *, u16, u64, u64, u64);
55
56static inline int bch2_lru_change(struct btree_trans *trans,
57 u16 lru_id, u64 dev_bucket,
58 u64 old_time, u64 new_time)
59{
60 return old_time != new_time
61 ? __bch2_lru_change(trans, lru_id, dev_bucket, old_time, new_time)
62 : 0;
63}
64
65struct bkey_buf;
66int bch2_lru_check_set(struct btree_trans *, u16, u64, u64, struct bkey_s_c, struct bkey_buf *);
67
68int bch2_check_lrus(struct bch_fs *);
69
70#endif /* _BCACHEFS_LRU_H */