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 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 23 static 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 28 static 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 37 int bch2_btree_key_cache_journal_flush(struct journal *, 38 struct journal_entry_pin *, u64); 39 40 struct bkey_cached * 41 bch2_btree_key_cache_find(struct bch_fs *, enum btree_id, struct bpos); 42 43 int bch2_btree_path_traverse_cached(struct btree_trans *, struct btree_path *, 44 unsigned); 45 46 bool bch2_btree_insert_key_cached(struct btree_trans *, unsigned, 47 struct btree_insert_entry *); 48 void bch2_btree_key_cache_drop(struct btree_trans *, 49 struct btree_path *); 50 51 void bch2_fs_btree_key_cache_exit(struct btree_key_cache *); 52 void bch2_fs_btree_key_cache_init_early(struct btree_key_cache *); 53 int bch2_fs_btree_key_cache_init(struct btree_key_cache *); 54 55 void bch2_btree_key_cache_to_text(struct printbuf *, struct btree_key_cache *); 56 57 void bch2_btree_key_cache_exit(void); 58 int __init bch2_btree_key_cache_init(void); 59 60 #endif /* _BCACHEFS_BTREE_KEY_CACHE_H */ 61