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| author | Chris Mason <chris.mason@oracle.com> | 2011-07-28 00:13:10 +0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-07-28 00:18:13 +0400 |
| commit | ff95acb6733d41a8d45feb0e18b96df25e610e78 (patch) | |
| tree | e20983c579c9095970aefa9cb176a9df0654d1e4 /fs/btrfs/locking.h | |
| parent | 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe (diff) | |
| parent | 75c195a2cac2c3c8366c0b87de2d6814c4f4d638 (diff) | |
| download | linux-ff95acb6733d41a8d45feb0e18b96df25e610e78.tar.xz | |
Merge branch 'integration' into for-linus
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 5c33a560a2f1..17247ddb81a0 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 |