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xfs: reduce IOCB_NOWAIT judgment for retry exclusive unaligned DIO

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Retry unaligned DIO with exclusive blocking semantics only when the
IOCB_NOWAIT flag is not set. If we are doing nonblocking user I/O,
propagate the error directly.

Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Kaixu Xia
2022-05-22 16:47:11 +10:00
committed by Dave Chinner
parent e62c720817
commit 93e6aa4329
1 changed files with 1 additions and 1 deletions
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2
fs/xfs/xfs_file.c
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@@ -576,9 +576,9 @@ xfs_file_dio_write_unaligned(
* don't even bother trying the fast path in this case. * don't even bother trying the fast path in this case.
*/ */
if (iocb->ki_pos > isize || iocb->ki_pos + count >= isize) { if (iocb->ki_pos > isize || iocb->ki_pos + count >= isize) {
retry_exclusive:
if (iocb->ki_flags & IOCB_NOWAIT) if (iocb->ki_flags & IOCB_NOWAIT)
return -EAGAIN; return -EAGAIN;
retry_exclusive:
iolock = XFS_IOLOCK_EXCL; iolock = XFS_IOLOCK_EXCL;
flags = IOMAP_DIO_FORCE_WAIT; flags = IOMAP_DIO_FORCE_WAIT;
} }