51 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _BCACHEFS_NOCOW_LOCKING_H3#define _BCACHEFS_NOCOW_LOCKING_H4 5#include "bcachefs.h"6#include "alloc_background.h"7#include "nocow_locking_types.h"8 9#include <linux/hash.h>10 11static inline struct nocow_lock_bucket *bucket_nocow_lock(struct bucket_nocow_lock_table *t,12 u64 dev_bucket)13{14 unsigned h = hash_64(dev_bucket, BUCKET_NOCOW_LOCKS_BITS);15 16 return t->l + (h & (BUCKET_NOCOW_LOCKS - 1));17}18 19#define BUCKET_NOCOW_LOCK_UPDATE (1 << 0)20 21bool bch2_bucket_nocow_is_locked(struct bucket_nocow_lock_table *, struct bpos);22void bch2_bucket_nocow_unlock(struct bucket_nocow_lock_table *, struct bpos, int);23bool __bch2_bucket_nocow_trylock(struct nocow_lock_bucket *, u64, int);24void __bch2_bucket_nocow_lock(struct bucket_nocow_lock_table *,25 struct nocow_lock_bucket *, u64, int);26 27static inline void bch2_bucket_nocow_lock(struct bucket_nocow_lock_table *t,28 struct bpos bucket, int flags)29{30 u64 dev_bucket = bucket_to_u64(bucket);31 struct nocow_lock_bucket *l = bucket_nocow_lock(t, dev_bucket);32 33 __bch2_bucket_nocow_lock(t, l, dev_bucket, flags);34}35 36static inline bool bch2_bucket_nocow_trylock(struct bucket_nocow_lock_table *t,37 struct bpos bucket, int flags)38{39 u64 dev_bucket = bucket_to_u64(bucket);40 struct nocow_lock_bucket *l = bucket_nocow_lock(t, dev_bucket);41 42 return __bch2_bucket_nocow_trylock(l, dev_bucket, flags);43}44 45void bch2_nocow_locks_to_text(struct printbuf *, struct bucket_nocow_lock_table *);46 47void bch2_fs_nocow_locking_exit(struct bch_fs *);48int bch2_fs_nocow_locking_init(struct bch_fs *);49 50#endif /* _BCACHEFS_NOCOW_LOCKING_H */51