50 lines
1.5 KiB
C
Executable file
50 lines
1.5 KiB
C
Executable file
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2008 Oracle. All rights reserved.
|
|
*/
|
|
|
|
#ifndef BTRFS_LOCKING_H
|
|
#define BTRFS_LOCKING_H
|
|
|
|
#define BTRFS_WRITE_LOCK 1
|
|
#define BTRFS_READ_LOCK 2
|
|
#define BTRFS_WRITE_LOCK_BLOCKING 3
|
|
#define BTRFS_READ_LOCK_BLOCKING 4
|
|
|
|
void btrfs_tree_lock(struct extent_buffer *eb);
|
|
void btrfs_tree_unlock(struct extent_buffer *eb);
|
|
|
|
void btrfs_tree_read_lock(struct extent_buffer *eb);
|
|
void btrfs_tree_read_unlock(struct extent_buffer *eb);
|
|
void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb);
|
|
void btrfs_set_lock_blocking_rw(struct extent_buffer *eb, int rw);
|
|
void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw);
|
|
void btrfs_assert_tree_locked(struct extent_buffer *eb);
|
|
int btrfs_try_tree_read_lock(struct extent_buffer *eb);
|
|
int btrfs_try_tree_write_lock(struct extent_buffer *eb);
|
|
int btrfs_tree_read_lock_atomic(struct extent_buffer *eb);
|
|
|
|
|
|
static inline void btrfs_tree_unlock_rw(struct extent_buffer *eb, int rw)
|
|
{
|
|
if (rw == BTRFS_WRITE_LOCK || rw == BTRFS_WRITE_LOCK_BLOCKING)
|
|
btrfs_tree_unlock(eb);
|
|
else if (rw == BTRFS_READ_LOCK_BLOCKING)
|
|
btrfs_tree_read_unlock_blocking(eb);
|
|
else if (rw == BTRFS_READ_LOCK)
|
|
btrfs_tree_read_unlock(eb);
|
|
else
|
|
BUG();
|
|
}
|
|
|
|
static inline void btrfs_set_lock_blocking(struct extent_buffer *eb)
|
|
{
|
|
btrfs_set_lock_blocking_rw(eb, BTRFS_WRITE_LOCK);
|
|
}
|
|
|
|
static inline void btrfs_clear_lock_blocking(struct extent_buffer *eb)
|
|
{
|
|
btrfs_clear_lock_blocking_rw(eb, BTRFS_WRITE_LOCK_BLOCKING);
|
|
}
|
|
#endif
|