From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sridhar Samudrala Subject: [PATCH v4 1/2] virtio_net: Introduce VIRTIO_NET_F_BACKUP feature bit Date: Thu, 1 Mar 2018 12:08:42 -0800 Message-ID: <1519934923-39372-2-git-send-email-sridhar.samudrala@intel.com> References: <1519934923-39372-1-git-send-email-sridhar.samudrala@intel.com> To: mst@redhat.com, stephen@networkplumber.org, davem@davemloft.net, netdev@vger.kernel.org, jiri@resnulli.us, virtio-dev@lists.oasis-open.org, jesse.brandeburg@intel.com, alexander.h.duyck@intel.com, kubakici@wp.pl, sridhar.samudrala@intel.com Return-path: Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: In-Reply-To: <1519934923-39372-1-git-send-email-sridhar.samudrala@intel.com> List-Id: netdev.vger.kernel.org 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. VIRTIO_NET_F_BACKUP is defined as bit 62 as it is a device feature bit. Signed-off-by: Sridhar Samudrala Reviewed-by: Jesse Brandeburg --- 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 626c27352ae2..bcd13fe906ca 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2920,7 +2920,7 @@ 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