git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/journal_reclaim.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_JOURNAL_RECLAIM_H
   3 #define _BCACHEFS_JOURNAL_RECLAIM_H
   4
   5 #define JOURNAL_PIN     (32 * 1024)
   6
   7 static inline void journal_reclaim_kick(struct journal *j)
   8 {
   9         struct task_struct *p = READ_ONCE(j->reclaim_thread);
  10
  11         j->reclaim_kicked = true;
  12         if (p)
  13                 wake_up_process(p);
  14 }
  15
  16 unsigned bch2_journal_dev_buckets_available(struct journal *,
  17                                             struct journal_device *,
  18                                             enum journal_space_from);
  19 void bch2_journal_space_available(struct journal *);
  20
  21 static inline bool journal_pin_active(struct journal_entry_pin *pin)
  22 {
  23         return pin->seq != 0;
  24 }
  25
  26 static inline struct journal_entry_pin_list *
  27 journal_seq_pin(struct journal *j, u64 seq)
  28 {
  29         EBUG_ON(seq < j->pin.front || seq >= j->pin.back);
  30
  31         return &j->pin.data[seq & j->pin.mask];
  32 }
  33
  34 void bch2_journal_reclaim_fast(struct journal *);
  35 bool __bch2_journal_pin_put(struct journal *, u64);
  36 void bch2_journal_pin_put(struct journal *, u64);
  37 void bch2_journal_pin_drop(struct journal *, struct journal_entry_pin *);
  38
  39 void bch2_journal_pin_set(struct journal *, u64, struct journal_entry_pin *,
  40                           journal_pin_flush_fn);
  41
  42 static inline void bch2_journal_pin_add(struct journal *j, u64 seq,
  43                                         struct journal_entry_pin *pin,
  44                                         journal_pin_flush_fn flush_fn)
  45 {
  46         if (unlikely(!journal_pin_active(pin) || pin->seq > seq))
  47                 bch2_journal_pin_set(j, seq, pin, flush_fn);
  48 }
  49
  50 static inline void bch2_journal_pin_copy(struct journal *j,
  51                                          struct journal_entry_pin *dst,
  52                                          struct journal_entry_pin *src,
  53                                          journal_pin_flush_fn flush_fn)
  54 {
  55         /* Guard against racing with journal_pin_drop(src): */
  56         u64 seq = READ_ONCE(src->seq);
  57
  58         if (seq)
  59                 bch2_journal_pin_add(j, seq, dst, flush_fn);
  60 }
  61
  62 static inline void bch2_journal_pin_update(struct journal *j, u64 seq,
  63                                            struct journal_entry_pin *pin,
  64                                            journal_pin_flush_fn flush_fn)
  65 {
  66         if (unlikely(!journal_pin_active(pin) || pin->seq < seq))
  67                 bch2_journal_pin_set(j, seq, pin, flush_fn);
  68 }
  69
  70 void bch2_journal_pin_flush(struct journal *, struct journal_entry_pin *);
  71
  72 void bch2_journal_do_discards(struct journal *);
  73 int bch2_journal_reclaim(struct journal *);
  74
  75 void bch2_journal_reclaim_stop(struct journal *);
  76 int bch2_journal_reclaim_start(struct journal *);
  77
  78 bool bch2_journal_flush_pins(struct journal *, u64);
  79
  80 static inline bool bch2_journal_flush_all_pins(struct journal *j)
  81 {
  82         return bch2_journal_flush_pins(j, U64_MAX);
  83 }
  84
  85 int bch2_journal_flush_device_pins(struct journal *, int);
  86
  87 #endif /* _BCACHEFS_JOURNAL_RECLAIM_H */