On Tue, Feb 19, 2013 at 06:50:22PM +0100, Markus Armbruster wrote: > Stefan Hajnoczi <stefa...@gmail.com> writes: > > > On Tue, Feb 19, 2013 at 09:53:07AM +0100, Markus Armbruster wrote: > >> Stefan Hajnoczi <stefa...@redhat.com> writes: > >> > >> > On Tue, Feb 19, 2013 at 12:37:28PM +1100, Alexey Kardashevskiy wrote: > >> >> On 14/02/13 21:26, Stefan Hajnoczi wrote: > >> >> > >> >> >>>>Now I want to enable network dump. With the old "-net" syntax > >> >> >>>> I could do > >> >> >>>>that with "-net dump" but I cannot with the new syntax, tried many > >> >> >>>>variants, none works. What would the correct syntax be for > >> >> >>>> the case above? > >> >> > >> >> The question was about new "-netdev" interface. > >> >> > >> >> >I would do: > >> >> > > >> >> >qemu-system-ppc64 ... > >> >> > -net tap,ifname=tap0,script=qemu-ifup.sh > >> >> > -net nic,model=virtio > >> >> > -net dump,file=./dump.lan.qemu.virtio > >> >> > > >> >> > >> >> The answer is about old "-net" interface which I know how to use. > >> >> > >> >> Does this mean that there is no way to use "dump" with "-netdev tap"? > >> > > >> > It is not possible using just -netdev/-device. The closest you can get > >> > is: > >> > > >> > $ qemu -netdev hubport,hubid=1,id=hubport0 \ > >> > -device virtio-net-pci,netdev=hubport0,... \ > >> > -net tap,vlan=1,... \ > >> > -net dump,vlan=1,... > >> > >> Care to explain briefly how hubport works, and how it's connected to the > >> legacy "vlan" feature? > > > > -netdev hubport instantiates a new port on a hub with "vlan" number > > hubid=<number>. > > > > hubport is a -netdev, so it allows you to hook up a NIC to a hub using > > -netdev/-device syntax. > > > > This is just playing games with syntax, we still have a hub in between > > the virtio-net-pci, tap, and dump devices. I didn't check if the > > offload features get plumbed through, but I wouldn't count on it. > > Thanks. > > Would you mind documenting net backend hubport in qemu-options.hx? Was > forgotten in commit f6c874e3.
Sure. Stefan
