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-rw-r--r--fs/bcachefs/journal_reclaim.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/fs/bcachefs/journal_reclaim.h b/fs/bcachefs/journal_reclaim.h
new file mode 100644
index 0000000000..494d1a6edd
--- /dev/null
+++ b/fs/bcachefs/journal_reclaim.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_JOURNAL_RECLAIM_H
+#define _BCACHEFS_JOURNAL_RECLAIM_H
+
+#define JOURNAL_PIN (32 * 1024)
+
+static inline void journal_reclaim_kick(struct journal *j)
+{
+ struct task_struct *p = READ_ONCE(j->reclaim_thread);
+
+ 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_reclaim_fast(struct journal *);
+bool __bch2_journal_pin_put(struct journal *, u64);
+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)
+{
+ /* Guard against racing with journal_pin_drop(src): */
+ u64 seq = READ_ONCE(src->seq);
+
+ if (seq)
+ bch2_journal_pin_add(j, 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 *);
+int 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 */