1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_NOCOW_LOCKING_H
3 #define _BCACHEFS_NOCOW_LOCKING_H
6 #include "alloc_background.h"
7 #include "nocow_locking_types.h"
9 #include <linux/hash.h>
11 static inline struct nocow_lock_bucket *bucket_nocow_lock(struct bucket_nocow_lock_table *t,
14 unsigned h = hash_64(dev_bucket, BUCKET_NOCOW_LOCKS_BITS);
16 return t->l + (h & (BUCKET_NOCOW_LOCKS - 1));
19 #define BUCKET_NOCOW_LOCK_UPDATE (1 << 0)
21 bool bch2_bucket_nocow_is_locked(struct bucket_nocow_lock_table *, struct bpos);
22 void bch2_bucket_nocow_unlock(struct bucket_nocow_lock_table *, struct bpos, int);
23 void __bch2_bucket_nocow_lock(struct bucket_nocow_lock_table *,
24 struct nocow_lock_bucket *, u64, int);
26 static inline void bch2_bucket_nocow_lock(struct bucket_nocow_lock_table *t,
27 struct bpos bucket, int flags)
29 u64 dev_bucket = bucket_to_u64(bucket);
30 struct nocow_lock_bucket *l = bucket_nocow_lock(t, dev_bucket);
32 __bch2_bucket_nocow_lock(t, l, dev_bucket, flags);
35 void bch2_nocow_locks_to_text(struct printbuf *, struct bucket_nocow_lock_table *);
37 int bch2_fs_nocow_locking_init(struct bch_fs *);
39 #endif /* _BCACHEFS_NOCOW_LOCKING_H */