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1e3b40980b
- assert in shutdown path that no nocow locks are held - check for overflow when taking nocow locks Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_NOCOW_LOCKING_H
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#define _BCACHEFS_NOCOW_LOCKING_H
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#include "bcachefs.h"
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#include "alloc_background.h"
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#include "nocow_locking_types.h"
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#include <linux/hash.h>
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static inline struct nocow_lock_bucket *bucket_nocow_lock(struct bucket_nocow_lock_table *t,
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u64 dev_bucket)
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{
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unsigned h = hash_64(dev_bucket, BUCKET_NOCOW_LOCKS_BITS);
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return t->l + (h & (BUCKET_NOCOW_LOCKS - 1));
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}
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#define BUCKET_NOCOW_LOCK_UPDATE (1 << 0)
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bool bch2_bucket_nocow_is_locked(struct bucket_nocow_lock_table *, struct bpos);
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void bch2_bucket_nocow_unlock(struct bucket_nocow_lock_table *, struct bpos, int);
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bool __bch2_bucket_nocow_trylock(struct nocow_lock_bucket *, u64, int);
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void __bch2_bucket_nocow_lock(struct bucket_nocow_lock_table *,
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struct nocow_lock_bucket *, u64, int);
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static inline void bch2_bucket_nocow_lock(struct bucket_nocow_lock_table *t,
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struct bpos bucket, int flags)
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{
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u64 dev_bucket = bucket_to_u64(bucket);
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struct nocow_lock_bucket *l = bucket_nocow_lock(t, dev_bucket);
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__bch2_bucket_nocow_lock(t, l, dev_bucket, flags);
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}
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static inline bool bch2_bucket_nocow_trylock(struct bucket_nocow_lock_table *t,
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struct bpos bucket, int flags)
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{
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u64 dev_bucket = bucket_to_u64(bucket);
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struct nocow_lock_bucket *l = bucket_nocow_lock(t, dev_bucket);
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return __bch2_bucket_nocow_trylock(l, dev_bucket, flags);
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}
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void bch2_nocow_locks_to_text(struct printbuf *, struct bucket_nocow_lock_table *);
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void bch2_fs_nocow_locking_exit(struct bch_fs *);
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int bch2_fs_nocow_locking_init(struct bch_fs *);
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#endif /* _BCACHEFS_NOCOW_LOCKING_H */
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