From 7b53b868a1812a9a6ab5e69249394bd37f29ce2c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 15 Jan 2020 09:11:17 -0800 Subject: xfs: fix IOCB_NOWAIT handling in xfs_file_dio_aio_read Direct I/O reads can also be used with RWF_NOWAIT & co. Fix the inode locking in xfs_file_dio_aio_read to take IOCB_NOWAIT into account. Signed-off-by: Christoph Hellwig Reviewed-by: Carlos Maiolino Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_file.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'fs/xfs') diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index c93250108952..b8a4a3f29b36 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -187,7 +187,12 @@ xfs_file_dio_aio_read( file_accessed(iocb->ki_filp); - xfs_ilock(ip, XFS_IOLOCK_SHARED); + if (iocb->ki_flags & IOCB_NOWAIT) { + if (!xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED)) + return -EAGAIN; + } else { + xfs_ilock(ip, XFS_IOLOCK_SHARED); + } ret = iomap_dio_rw(iocb, to, &xfs_read_iomap_ops, NULL, is_sync_kiocb(iocb)); xfs_iunlock(ip, XFS_IOLOCK_SHARED); -- cgit v1.2.3