fs/bcachefs/lru.h

   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         if (lru_id == BCH_LRU_FRAGMENTATION_START)
  32                 return BCH_LRU_fragmentation;
  33         return BCH_LRU_read;
  34 }
  35
  36 int bch2_lru_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);
  37 void bch2_lru_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
  38
  39 void bch2_lru_pos_to_text(struct printbuf *, struct bpos);
  40
  41 #define bch2_bkey_ops_lru ((struct bkey_ops) {  \
  42         .key_validate   = bch2_lru_validate,    \
  43         .val_to_text    = bch2_lru_to_text,     \
  44         .min_val_size   = 8,                    \
  45 })
  46
  47 int bch2_lru_del(struct btree_trans *, u16, u64, u64);
  48 int bch2_lru_set(struct btree_trans *, u16, u64, u64);
  49 int bch2_lru_change(struct btree_trans *, u16, u64, u64, u64);
  50
  51 struct bkey_buf;
  52 int bch2_lru_check_set(struct btree_trans *, u16, u64, struct bkey_s_c, struct bkey_buf *);
  53
  54 int bch2_check_lrus(struct bch_fs *);
  55
  56 #endif /* _BCACHEFS_LRU_H */