mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-12-28 16:56:26 +00:00
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 */
|
|
#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 */
|