diff options
Diffstat (limited to 'fs/btrfs/locking.h')
| -rw-r--r-- | fs/btrfs/locking.h | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/fs/btrfs/locking.h b/fs/btrfs/locking.h index 5c33a560a2f..17247ddb81a 100644 --- a/fs/btrfs/locking.h +++ b/fs/btrfs/locking.h @@ -19,11 +19,43 @@ #ifndef __BTRFS_LOCKING_ #define __BTRFS_LOCKING_ +#define BTRFS_WRITE_LOCK 1 +#define BTRFS_READ_LOCK 2 +#define BTRFS_WRITE_LOCK_BLOCKING 3 +#define BTRFS_READ_LOCK_BLOCKING 4 + int btrfs_tree_lock(struct extent_buffer *eb); int btrfs_tree_unlock(struct extent_buffer *eb); int btrfs_try_spin_lock(struct extent_buffer *eb); -void btrfs_set_lock_blocking(struct extent_buffer *eb); -void btrfs_clear_lock_blocking(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); + +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 |