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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_JOURNAL_RECLAIM_H
#define _BCACHEFS_JOURNAL_RECLAIM_H
#define JOURNAL_PIN (32 * 1024)
enum journal_space_from {
journal_space_discarded,
journal_space_clean_ondisk,
journal_space_clean,
};
static inline void journal_reclaim_kick(struct journal *j)
{
struct task_struct *p = READ_ONCE(j->reclaim_thread);
if (p && !j->reclaim_kicked) {
j->reclaim_kicked = true;
if (p)
wake_up_process(p);
}
}
unsigned bch2_journal_dev_buckets_available(struct journal *,
struct journal_device *,
enum journal_space_from);
void bch2_journal_space_available(struct journal *);
static inline bool journal_pin_active(struct journal_entry_pin *pin)
{
return pin->seq != 0;
}
static inline struct journal_entry_pin_list *
journal_seq_pin(struct journal *j, u64 seq)
{
EBUG_ON(seq < j->pin.front || seq >= j->pin.back);
return &j->pin.data[seq & j->pin.mask];
}
void bch2_journal_pin_put(struct journal *, u64);
void bch2_journal_pin_drop(struct journal *, struct journal_entry_pin *);
void bch2_journal_pin_set(struct journal *, u64, struct journal_entry_pin *,
journal_pin_flush_fn);
static inline void bch2_journal_pin_add(struct journal *j, u64 seq,
struct journal_entry_pin *pin,
journal_pin_flush_fn flush_fn)
{
if (unlikely(!journal_pin_active(pin) || pin->seq > seq))
bch2_journal_pin_set(j, seq, pin, flush_fn);
}
static inline void bch2_journal_pin_copy(struct journal *j,
struct journal_entry_pin *dst,
struct journal_entry_pin *src,
journal_pin_flush_fn flush_fn)
{
if (journal_pin_active(src))
bch2_journal_pin_add(j, src->seq, dst, flush_fn);
}
static inline void bch2_journal_pin_update(struct journal *j, u64 seq,
struct journal_entry_pin *pin,
journal_pin_flush_fn flush_fn)
{
if (unlikely(!journal_pin_active(pin) || pin->seq < seq))
bch2_journal_pin_set(j, seq, pin, flush_fn);
}
void bch2_journal_pin_flush(struct journal *, struct journal_entry_pin *);
void bch2_journal_do_discards(struct journal *);
void bch2_journal_reclaim(struct journal *);
void bch2_journal_reclaim_stop(struct journal *);
int bch2_journal_reclaim_start(struct journal *);
bool bch2_journal_flush_pins(struct journal *, u64);
static inline bool bch2_journal_flush_all_pins(struct journal *j)
{
return bch2_journal_flush_pins(j, U64_MAX);
}
int bch2_journal_flush_device_pins(struct journal *, int);
#endif /* _BCACHEFS_JOURNAL_RECLAIM_H */
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