On Tue 22-08-17 18:17:12, Christoph Hellwig wrote: > All support is already there in the generic code, we just need to wire > it up. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> Looks good. You can add: Reviewed-by: Jan Kara <jack@xxxxxxx> Honza > --- > fs/block_dev.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/fs/block_dev.c b/fs/block_dev.c > index 9941dc8342df..ea21d18d8e79 100644 > --- a/fs/block_dev.c > +++ b/fs/block_dev.c > @@ -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); > -- > 2.11.0 > -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
