[PATCH 03/12] xfs: fix IOCB_NOWAIT handling in xfs_file_dio_aio_read
From: Christoph Hellwig <hch@lst.de>
Date: 2020-01-14 16:12:41
Also in:
linux-fsdevel, linux-mm, linux-xfs, lkml
Subsystem:
filesystems (vfs and infrastructure), the rest, xfs filesystem · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds, Carlos Maiolino
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 <hch@lst.de> --- fs/xfs/xfs_file.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
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);
--
2.24.1