1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_BTREE_KEY_CACHE_H
3 #define _BCACHEFS_BTREE_KEY_CACHE_H
4
5 static 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
14 static inline bool 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
23 int bch2_btree_key_cache_journal_flush(struct journal *,
24 struct journal_entry_pin *, u64);
25
26 struct bkey_cached *
27 bch2_btree_key_cache_find(struct bch_fs *, enum btree_id, struct bpos);
28
29 int bch2_btree_path_traverse_cached(struct btree_trans *, struct btree_path *,
30 unsigned);
31
32 bool bch2_btree_insert_key_cached(struct btree_trans *, unsigned,
33 struct btree_insert_entry *);
34 void bch2_btree_key_cache_drop(struct btree_trans *,
35 struct btree_path *);
36
37 void bch2_fs_btree_key_cache_exit(struct btree_key_cache *);
38 void bch2_fs_btree_key_cache_init_early(struct btree_key_cache *);
39 int bch2_fs_btree_key_cache_init(struct btree_key_cache *);
40
41 void bch2_btree_key_cache_to_text(struct printbuf *, struct btree_key_cache *);
42
43 void bch2_btree_key_cache_exit(void);
44 int __init bch2_btree_key_cache_init(void);
45
46 #endif /* _BCACHEFS_BTREE_KEY_CACHE_H */
47
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