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Date: Thu, 11 Jan 2018 21:58:38 -0800 From: Sridhar Samudrala <sridhar.samudrala@...el.com> To: mst@...hat.com, stephen@...workplumber.org, davem@...emloft.net, netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org, virtio-dev@...ts.oasis-open.org, jesse.brandeburg@...el.com, alexander.h.duyck@...el.com, kubakici@...pl, sridhar.samudrala@...el.com Subject: [RFC PATCH net-next v2 1/2] virtio_net: Introduce VIRTIO_NET_F_BACKUP feature bit This feature bit can be used by hypervisor to indicate virtio_net device to act as a backup for another device with the same MAC address. Signed-off-by: Sridhar Samudrala <sridhar.samudrala@...el.com> --- drivers/net/virtio_net.c | 2 +- include/uapi/linux/virtio_net.h | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 12dfc5fee58e..f149a160a8c5 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2829,7 +2829,7 @@ static struct virtio_device_id id_table[] = { VIRTIO_NET_F_GUEST_ANNOUNCE, VIRTIO_NET_F_MQ, \ VIRTIO_NET_F_CTRL_MAC_ADDR, \ VIRTIO_NET_F_MTU, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, \ - VIRTIO_NET_F_SPEED_DUPLEX + VIRTIO_NET_F_SPEED_DUPLEX, VIRTIO_NET_F_BACKUP static unsigned int features[] = { VIRTNET_FEATURES, diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h index 5de6ed37695b..c7c35fd1a5ed 100644 --- a/include/uapi/linux/virtio_net.h +++ b/include/uapi/linux/virtio_net.h @@ -57,6 +57,9 @@ * Steering */ #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */ +#define VIRTIO_NET_F_BACKUP 62 /* Act as backup for another device + * with the same MAC. + */ #define VIRTIO_NET_F_SPEED_DUPLEX 63 /* Device set linkspeed and duplex */ #ifndef VIRTIO_NET_NO_LEGACY -- 2.14.3
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