diff options
| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2020-09-24 11:39:16 -0500 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-12-08 15:53:47 +0100 |
| commit | a14b78ad06aba0fa7e76d2bc13c5ba581a7f331a (patch) | |
| tree | c777a29dc6c69bd1ae8fa2e32a491cda74aa6a22 /fs/btrfs/ctree.h | |
| parent | b8d8e1fd570a194904f545b135efc880d96a41a4 (diff) | |
| download | linux-a14b78ad06aba0fa7e76d2bc13c5ba581a7f331a.tar.gz | |
btrfs: introduce btrfs_inode_lock()/unlock()
btrfs_inode_lock/unlock() are wrappers around inode locks, separating
the type of lock and actual locking.
- 0 - default, exclusive lock
- BTRFS_ILOCK_SHARED - for shared locks, for possible parallel DIO
- BTRFS_ILOCK_TRY - for the RWF_NOWAIT sequence
The bits SHARED and TRY can be combined together.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 5244400d5c23..6ee7252f51c0 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3070,6 +3070,13 @@ extern const struct iomap_ops btrfs_dio_iomap_ops; extern const struct iomap_dio_ops btrfs_dio_ops; extern const struct iomap_dio_ops btrfs_sync_dops; +/* Inode locking type flags, by default the exclusive lock is taken */ +#define BTRFS_ILOCK_SHARED (1U << 0) +#define BTRFS_ILOCK_TRY (1U << 1) + +int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags); +void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags); + /* ioctl.c */ long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |