On 12/09/2013 07:16 PM, Stephen Hemminger wrote: > The virtio_net driver never sends the multicast address list to > the host. This is because send command takes a pointer to scatter list > to send but only inserts that one entry into the outgoing scatter list. > > This bug has been there since: > commit f565a7c259d71cc186753653d978c646d2354b36 > Author: Alex Williamson <alex.william...@hp.com> > Date: Wed Feb 4 09:02:45 2009 +0000 > > virtio_net: Add a MAC filter table > > Signed-off-by: Stephen Hemminger <step...@networkplumber.org> > > --- a/drivers/net/virtio_net.c 2013-12-09 16:12:03.897891975 -0800 > +++ b/drivers/net/virtio_net.c 2013-12-09 16:12:36.353164803 -0800 > @@ -893,7 +893,7 @@ static bool virtnet_send_command(struct > sg_init_one(&hdr, &ctrl, sizeof(ctrl)); > sgs[out_num++] = &hdr; > > - if (out) > + for (; out; out = sg_next(out)) > sgs[out_num++] = out; > if (in) > sgs[out_num + in_num++] = in;
Hi Stephen Amos Kong pointed out in your original thread, that this doesn't seem to be needed and is working for him. I just checked my VMs and it's working for me as well without this. Have you seen it fail? Amos did a very good job explaining, but it basically boils down to the fact that virtqueue_add_sgs() treats each entry of the sgs array as a list and walks each list using exactly the same code as this patch proposes :). virtqueue_add() also walks each array element as a list. -vlad _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
