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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCACHEFS_BTREE_KEY_CACHE_H
3#define _BCACHEFS_BTREE_KEY_CACHE_H
4
5static inline size_t bch2_nr_btree_keys_need_flush(struct bch_fs *c)
6{
7 size_t nr_dirty = atomic_long_read(&c->btree_key_cache.nr_dirty);
8 size_t nr_keys = atomic_long_read(&c->btree_key_cache.nr_keys);
9 size_t max_dirty = 1024 + nr_keys / 2;
10
11 return max_t(ssize_t, 0, nr_dirty - max_dirty);
12}
13
14static inline ssize_t __bch2_btree_key_cache_must_wait(struct bch_fs *c)
15{
16 size_t nr_dirty = atomic_long_read(&c->btree_key_cache.nr_dirty);
17 size_t nr_keys = atomic_long_read(&c->btree_key_cache.nr_keys);
18 size_t max_dirty = 4096 + (nr_keys * 3) / 4;
19
20 return nr_dirty - max_dirty;
21}
22
23static inline bool bch2_btree_key_cache_must_wait(struct bch_fs *c)
24{
25 return __bch2_btree_key_cache_must_wait(c) > 0;
26}
27
28static inline bool bch2_btree_key_cache_wait_done(struct bch_fs *c)
29{
30 size_t nr_dirty = atomic_long_read(&c->btree_key_cache.nr_dirty);
31 size_t nr_keys = atomic_long_read(&c->btree_key_cache.nr_keys);
32 size_t max_dirty = 2048 + (nr_keys * 5) / 8;
33
34 return nr_dirty <= max_dirty;
35}
36
37int bch2_btree_key_cache_journal_flush(struct journal *,
38 struct journal_entry_pin *, u64);
39
40struct bkey_cached *
41bch2_btree_key_cache_find(struct bch_fs *, enum btree_id, struct bpos);
42
43int bch2_btree_path_traverse_cached(struct btree_trans *, struct btree_path *,
44 unsigned);
45
46bool bch2_btree_insert_key_cached(struct btree_trans *, unsigned,
47 struct btree_insert_entry *);
48void bch2_btree_key_cache_drop(struct btree_trans *,
49 struct btree_path *);
50
51void bch2_fs_btree_key_cache_exit(struct btree_key_cache *);
52void bch2_fs_btree_key_cache_init_early(struct btree_key_cache *);
53int bch2_fs_btree_key_cache_init(struct btree_key_cache *);
54
55void bch2_btree_key_cache_to_text(struct printbuf *, struct btree_key_cache *);
56
57void bch2_btree_key_cache_exit(void);
58int __init bch2_btree_key_cache_init(void);
59
60#endif /* _BCACHEFS_BTREE_KEY_CACHE_H */