This adds the async buffered write support to XFS. For async buffered
write requests, the request will return -EAGAIN if the ilock cannot be
obtained immediately.
Signed-off-by: Stefan Roesch <shr@xxxxxx>
---
fs/xfs/xfs_file.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 6f9da1059e8b..49d54b939502 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -739,12 +739,14 @@ xfs_file_buffered_write(
bool cleared_space = false;
int iolock;
- if (iocb->ki_flags & IOCB_NOWAIT)
- return -EOPNOTSUPP;
-
write_retry:
iolock = XFS_IOLOCK_EXCL;
- xfs_ilock(ip, iolock);
+ if (iocb->ki_flags & IOCB_NOWAIT) {
+ if (!xfs_ilock_nowait(ip, iolock))
+ return -EAGAIN;
+ } else {
+ xfs_ilock(ip, iolock);
+ }
ret = xfs_file_write_checks(iocb, from, &iolock);
if (ret)
--
2.30.2
