On Thu, Feb 21, 2013 at 03:17:51PM +0100, Markus Armbruster wrote:
> Stefan Hajnoczi <stefa...@redhat.com> writes:
>
> > Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
> > ---
> > qemu-options.hx | 11 ++++++++++-
> > 1 file changed, 10 insertions(+), 1 deletion(-)
> >
> > diff --git a/qemu-options.hx b/qemu-options.hx
> > index 4bc9c85..cd18ad1 100644
> > --- a/qemu-options.hx
> > +++ b/qemu-options.hx
> > @@ -1404,7 +1404,8 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
> > #ifdef CONFIG_VDE
> > "vde|"
> > #endif
> > - "socket],id=str[,option][,option][,...]\n", QEMU_ARCH_ALL)
> > + "socket|"
> > + "hubport],id=str[,option][,option][,...]\n", QEMU_ARCH_ALL)
> > STEXI
> > @item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}]
> > [,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
> > @findex -net
> > @@ -1726,6 +1727,14 @@ vde_switch -F -sock /tmp/myswitch
> > qemu-system-i386 linux.img -net nic -net vde,sock=/tmp/myswitch
> > @end example
> >
> > +@item -netdev hubport,id=@var{id},hubid=@var{hubid}
> > +
> > +Create a hub port on QEMU "vlan" @var{hubid}. This syntax is an
> > alternative to
> > +the @code{-net @option{vlan}} argument and can be used to connect a NIC
> > +specified with @code{-device ...,netdev=@var{id}} to a QEMU "vlan".
>
> A simpler way to use a "vlan" with -device is "-device e1000,vlan=0".
> How is that related to hubport?
That is yet another shortcut syntax. It does the same thing as -netdev
hubport,id=tmphubport0,hubid=0 -device e1000,netdev=tmphubport0.
> > +
> > +Note that only NICs can be connected to a hubport, other -netdevs cannot.
> > +
>
> Well, netdevs can't be connected to a netdev in general, and hubport is
> one. You can connect up to one device model to a netdev. I figure you
> can additionally connect any number of old-style -net thingies to it,
> whether they are NICs or not. Correct?
net.c doesn't stop NetClients from connecting to each other. It's just
our -netdev option parsing code which doesn't allow -netdevs to connect
with each other.
-net instances can only connect to hub ports.
> > @item -net dump[,vlan=@var{n}][,file=@var{file}][,len=@var{len}]
> > Dump network traffic on VLAN @var{n} to file @var{file}
> > (@file{qemu-vlan0.pcap} by default).
> > At most @var{len} bytes (64k by default) per packet are stored. The file
> > format is
>
> I'm afraid you missed netdev_add in hmp-command.hx.
Thanks, will fix.
