diff options
| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2017-06-20 14:05:49 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-06-20 15:12:03 +0200 |
| commit | edf064e7c6fec3646b06c944a8e35d1a3de5c2c3 (patch) | |
| tree | 861835f7c0ae787598be8e18eac67f623d90658e /fs/btrfs/inode.c | |
| parent | xfs: nowait aio support (diff) | |
| download | linux-edf064e7c6fec3646b06c944a8e35d1a3de5c2c3.tar.xz linux-edf064e7c6fec3646b06c944a8e35d1a3de5c2c3.zip | |
btrfs: nowait aio support
Return EAGAIN if any of the following checks fail
+ i_rwsem is not lockable
+ NODATACOW or PREALLOC is not set
+ Cannot nocow at the desired location
+ Writing beyond end of file which is not allocated
Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index f942293dd7e7..556c93060606 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -8754,6 +8754,9 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) dio_data.overwrite = 1; inode_unlock(inode); relock = true; + } else if (iocb->ki_flags & IOCB_NOWAIT) { + ret = -EAGAIN; + goto out; } ret = btrfs_delalloc_reserve_space(inode, offset, count); if (ret) |