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Diffstat (limited to '')
| -rw-r--r-- | fs/bcachefs/nocow_locking.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/fs/bcachefs/nocow_locking.h b/fs/bcachefs/nocow_locking.h new file mode 100644 index 0000000000..f9d6a426a9 --- /dev/null +++ b/fs/bcachefs/nocow_locking.h @@ -0,0 +1,50 @@ +/* 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 */ |