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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_NOCOW_LOCKING_H
#define _BCACHEFS_NOCOW_LOCKING_H
#include "bcachefs.h"
#include "alloc_background.h"
#include "nocow_locking_types.h"
#include <linux/hash.h>
static inline struct nocow_lock_bucket *bucket_nocow_lock(struct bucket_nocow_lock_table *t,
u64 dev_bucket)
{
unsigned h = hash_64(dev_bucket, BUCKET_NOCOW_LOCKS_BITS);
return t->l + (h & (BUCKET_NOCOW_LOCKS - 1));
}
#define BUCKET_NOCOW_LOCK_UPDATE (1 << 0)
bool bch2_bucket_nocow_is_locked(struct bucket_nocow_lock_table *, struct bpos);
void bch2_bucket_nocow_unlock(struct bucket_nocow_lock_table *, struct bpos, int);
bool __bch2_bucket_nocow_trylock(struct nocow_lock_bucket *, u64, int);
void __bch2_bucket_nocow_lock(struct bucket_nocow_lock_table *,
struct nocow_lock_bucket *, u64, int);
static inline void bch2_bucket_nocow_lock(struct bucket_nocow_lock_table *t,
struct bpos bucket, int flags)
{
u64 dev_bucket = bucket_to_u64(bucket);
struct nocow_lock_bucket *l = bucket_nocow_lock(t, dev_bucket);
__bch2_bucket_nocow_lock(t, l, dev_bucket, flags);
}
static inline bool bch2_bucket_nocow_trylock(struct bucket_nocow_lock_table *t,
struct bpos bucket, int flags)
{
u64 dev_bucket = bucket_to_u64(bucket);
struct nocow_lock_bucket *l = bucket_nocow_lock(t, dev_bucket);
return __bch2_bucket_nocow_trylock(l, dev_bucket, flags);
}
void bch2_nocow_locks_to_text(struct printbuf *, struct bucket_nocow_lock_table *);
void bch2_fs_nocow_locking_exit(struct bch_fs *);
int bch2_fs_nocow_locking_init(struct bch_fs *);
#endif /* _BCACHEFS_NOCOW_LOCKING_H */
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