[libvirt] [PATCH] qemu: support vhost-net for generic ethernet devices
From qemu's point of view these are still just tap devices, so
there's
no reason they shouldn't work with vhost-net; as a matter of fact,
Raja Sivaramakrishnan <srajag00(a)yahoo.com> verified on libvir-list
that at least the qemu_command.c part of this patch works:
https://www.redhat.com/archives/libvir-list/2012-December/msg01314.html
(the hotplug case is extrapolation on my part).
---
src/qemu/qemu_command.c | 1 +
src/qemu/qemu_hotplug.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 33f2ecd..6c28123 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6159,6 +6159,7 @@ qemuBuildCommandLine(virConnectPtr conn,
if (actualType == VIR_DOMAIN_NET_TYPE_NETWORK ||
actualType == VIR_DOMAIN_NET_TYPE_BRIDGE ||
+ actualType == VIR_DOMAIN_NET_TYPE_ETHERNET ||
actualType == VIR_DOMAIN_NET_TYPE_DIRECT) {
/* Attempt to use vhost-net mode for these types of
network device */
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 4504f0b..0c28a6a 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -754,6 +754,9 @@ int qemuDomainAttachNetDevice(virConnectPtr conn,
iface_connected = true;
if (qemuOpenVhostNet(vm->def, net, priv->qemuCaps, &vhostfd) < 0)
goto cleanup;
+ } else if (actualType == VIR_DOMAIN_NET_TYPE_ETHERNET) {
+ if (qemuOpenVhostNet(vm->def, net, priv->qemuCaps, &vhostfd) < 0)
+ goto cleanup;
}
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_NET_NAME) ||
--
1.7.11.7