Commit c35fc7a5 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Al Viro
Browse files

block_dev: support RFW_NOWAIT on block device nodes 



All support is already there in the generic code, we just need to wire
it up.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 91f9943e

fs/block_dev.c

+5 −0
Original line number Diff line number Diff line
@@ -1739,6 +1739,8 @@ static int blkdev_open(struct inode * inode, struct file * filp) 
	 */

	filp->f_flags |= O_LARGEFILE;



	filp->f_mode |= FMODE_NOWAIT;



	if (filp->f_flags & O_NDELAY)

		filp->f_mode |= FMODE_NDELAY;

	if (filp->f_flags & O_EXCL)
@@ -1891,6 +1893,9 @@ ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from) 
	if (iocb->ki_pos >= size)

		return -ENOSPC;



	if ((iocb->ki_flags & (IOCB_NOWAIT | IOCB_DIRECT)) == IOCB_NOWAIT)

		return -EOPNOTSUPP;



	iov_iter_truncate(from, size - iocb->ki_pos);



	blk_start_plug(&plug);