On Thu, Jan 17, 2013 at 01:45:11PM +0800, Amos Kong wrote:
> On Thu, Jan 17, 2013 at 11:49:20AM +1030, Rusty Russell wrote:
> > akong@xxxxxxxxxx writes:
> > > @@ -349,6 +351,14 @@ static int virtio_net_handle_mac(VirtIONet *n, uint8_t cmd,
> > > {
> > > struct virtio_net_ctrl_mac mac_data;
> > >
> > > + if (cmd == VIRTIO_NET_CTRL_MAC_ADDR_SET && elem->out_num == 2 &&
> > > + elem->out_sg[1].iov_len == ETH_ALEN) {
> > > + /* Set MAC address */
> > > + memcpy(n->mac, elem->out_sg[1].iov_base, elem->out_sg[1].iov_len);
> > > + qemu_format_nic_info_str(&n->nic->nc, n->mac);
> > > + return VIRTIO_NET_OK;
> > > + }
> >
> > Does the rest of the net device still rely on the layout of descriptors?
>
> No, only info string of net client relies on n->mac
I misunderstood. There is no clear limitation of how much descriptor are
used for each vq command, but many commands rely on the layout of
descriptiors. eg:
virtio-net:
VIRTIO_NET_CTRL_RX_PROMISC
VIRTIO_NET_CTRL_RX_ALLMULTI
VIRTIO_NET_CTRL_MAC_TABLE_SET
etc
> > If so, OK, we'll fix them all together. If not, this introduces a new
> > one.
> >
> > Cheers,
> > Rusty.
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