The virtio_net device is implicitly enabled if user doesn't
explicitly specify that virtio_net is disabled. This is
counter-intuitive to how the rest of the virtio commandline
works.
For backwards-compatibility, the commandline parameters are
not changed. Instead, this patch prints out a warning if
virtio_net is implicitly enabled.
Signed-off-by: Martin Radev <martin.b.radev@xxxxxxxxx>
---
virtio/net.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/virtio/net.c b/virtio/net.c
index 9a25bfa..ab75d40 100644
--- a/virtio/net.c
+++ b/virtio/net.c
@@ -1002,6 +1002,9 @@ int virtio_net__init(struct kvm *kvm)
if (kvm->cfg.num_net_devices == 0 && kvm->cfg.no_net == 0) {
static struct virtio_net_params net_params;
+ pr_warning(
+ "No net devices configured, but no_net not specified. "
+ "Enabling virtio_net with default network settings...\n");
net_params = (struct virtio_net_params) {
.guest_ip = kvm->cfg.guest_ip,
--
2.25.1
