[PATCH v4 1/2] virtio_net: Introduce VIRTIO_NET_F_BACKUP feature bit
From: Sridhar Samudrala <sridhar.samudrala@intel.com>
Date: 2018-03-01 20:08:42
Subsystem:
networking drivers, the rest, virtio core, virtio net driver · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, "Michael S. Tsirkin", Jason Wang, Eugenio Pérez
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 <sridhar.samudrala@intel.com> Reviewed-by: Jesse Brandeburg <redacted> --- 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
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2.14.3