1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _BCACHEFS_LRU_H 3 #define _BCACHEFS_LRU_H 4 5 static inline u64 lru_pos_id(struct bpos pos) 6 { 7 return pos.inode >> LRU_TIME_BITS; 8 } 9 10 static inline u64 lru_pos_time(struct bpos pos) 11 { 12 return pos.inode & ~(~0ULL << LRU_TIME_BITS); 13 } 14 15 static 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 27 static 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 41 int bch2_lru_validate(struct bch_fs *, struct bkey_s_c, struct bkey_validate_context); 42 void bch2_lru_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c); 43 44 void 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 52 int bch2_lru_del(struct btree_trans *, u16, u64, u64); 53 int bch2_lru_set(struct btree_trans *, u16, u64, u64); 54 int __bch2_lru_change(struct btree_trans *, u16, u64, u64, u64); 55 56 static 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 65 struct bkey_buf; 66 int bch2_lru_check_set(struct btree_trans *, u16, u64, u64, struct bkey_s_c, struct bkey_buf *); 67 68 int bch2_check_lrus(struct bch_fs *); 69 70 #endif /* _BCACHEFS_LRU_H */ 71