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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-14 19:29:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-14 19:29:55 -0700
commite253d98f5babbec7e6ced810f7335b265a7f7e83 (patch)
treecd688c4ba8d43edb12bbeb523393879f7c212b65 /fs/xfs
parent0f0d12728e56c94d3289c6831243b6faeae8a19d (diff)
parentc35fc7a5abae9c154dd6f8c0b288462342facd45 (diff)
Merge branch 'work.read_write' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull nowait read support from Al Viro: "Support IOCB_NOWAIT for buffered reads and block devices" * 'work.read_write' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: block_dev: support RFW_NOWAIT on block device nodes fs: support RWF_NOWAIT for buffered reads fs: support IOCB_NOWAIT in generic_file_buffered_read fs: pass iocb to do_generic_file_read
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_file.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index ec3e44fcf771..ebdd0bd2b261 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -259,7 +259,11 @@ xfs_file_buffered_aio_read(
trace_xfs_file_buffered_read(ip, iov_iter_count(to), iocb->ki_pos);
- xfs_ilock(ip, XFS_IOLOCK_SHARED);
+ if (!xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED)) {
+ if (iocb->ki_flags & IOCB_NOWAIT)
+ return -EAGAIN;
+ xfs_ilock(ip, XFS_IOLOCK_SHARED);
+ }
ret = generic_file_read_iter(iocb, to);
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
@@ -636,6 +640,9 @@ xfs_file_buffered_aio_write(
int enospc = 0;
int iolock;
+ if (iocb->ki_flags & IOCB_NOWAIT)
+ return -EOPNOTSUPP;
+
write_retry:
iolock = XFS_IOLOCK_EXCL;
xfs_ilock(ip, iolock);
@@ -912,7 +919,7 @@ xfs_file_open(
return -EFBIG;
if (XFS_FORCED_SHUTDOWN(XFS_M(inode->i_sb)))
return -EIO;
- file->f_mode |= FMODE_AIO_NOWAIT;
+ file->f_mode |= FMODE_NOWAIT;
return 0;
}