lkml.org 
[lkml]   [2018]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [V9fs-developer] [PATCH] 9p/trans_virtio: discard zero-length reply
OK, I've queued it.

On Thu, Feb 08, 2018 at 06:52:32PM +0100, Greg Kurz wrote:
> Ping ?
>
> Michael,
>
> Since this is virtio code and you have acked the QEMU part of the fix already,
> would you be kind enough to take this through your tree ?
>
> Cheers,
>
> --
> Greg
>
> On Mon, 22 Jan 2018 22:02:05 +0100
> Greg Kurz <groug@kaod.org> wrote:
>
> > When a 9p request is successfully flushed, the server is expected to just
> > mark it as used without sending a 9p reply (ie, without writing data into
> > the buffer). In this case, virtqueue_get_buf() will return len == 0 and
> > we must not report a REQ_STATUS_RCVD status to the client, otherwise the
> > client will erroneously assume the request has not been flushed.
> >
> > Signed-off-by: Greg Kurz <groug@kaod.org>
> > ---
> > net/9p/trans_virtio.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
> > index 0845aad4ba51..ca08c72ef4de 100644
> > --- a/net/9p/trans_virtio.c
> > +++ b/net/9p/trans_virtio.c
> > @@ -171,7 +171,8 @@ static void req_done(struct virtqueue *vq)
> > spin_unlock_irqrestore(&chan->lock, flags);
> > /* Wakeup if anyone waiting for VirtIO ring space. */
> > wake_up(chan->vc_wq);
> > - p9_client_cb(chan->client, req, REQ_STATUS_RCVD);
> > + if (len)
> > + p9_client_cb(chan->client, req, REQ_STATUS_RCVD);
> > }
> > }
> >
> >
> >
> > ------------------------------------------------------------------------------
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > _______________________________________________
> > V9fs-developer mailing list
> > V9fs-developer@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/v9fs-developer

\
 
 \ /
  Last update: 2018-02-08 20:14    [W:0.050 / U:18.412 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site