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qdev-properties-system.c: Allow vlan or netdev for -device, not both

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It is currently possible to specify things like:
	-device e1000,netdev=foo,vlan=1
With this usage, whichever argument was specified last (vlan or netdev)
overwrites what was previousely set and results in a non-working
configuration.  Even worse, when used with multiqueue devices,
it causes a segmentation fault on exit in qemu_free_net_client.

That patch treates the above command line options as invalid and
generates an error at start-up.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Vlad Yasevich 2013-11-07 21:13:09 -05:00 committed by Stefan Hajnoczi
parent 607bb022f2
commit 30c367ed44
1 changed files with 9 additions and 0 deletions
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9
hw/core/qdev-properties-system.c
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@ -205,6 +205,11 @@ static int parse_netdev(DeviceState *dev, const char *str, void **ptr)
goto err;
}
if (ncs[i]) {
ret = -EINVAL;
goto err;
}
ncs[i] = peers[i];
ncs[i]->queue_index = i;
}
@ -301,6 +306,10 @@ static void set_vlan(Object *obj, Visitor *v, void *opaque,
*ptr = NULL;
return;
}
if (*ptr) {
error_set_from_qdev_prop_error(errp, -EINVAL, dev, prop, name);
return;
}
hubport = net_hub_port_find(id);
if (!hubport) {