On 1/3/2018 9:43 AM, Michael S. Tsirkin wrote:
On Tue, Jan 02, 2018 at 04:35:37PM -0800, Sridhar Samudrala wrote:
This feature bit can be used by hypervisor to indicate virtio_net device to
act as a master for a directly attached passthru device with the same MAC
address.
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@xxxxxxxxx>
---
drivers/net/virtio_net.c | 3 ++-
include/uapi/linux/virtio_net.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 6fb7b658a6cc..46844a1d9a62 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2796,7 +2796,8 @@ static struct virtio_device_id id_table[] = {
VIRTIO_NET_F_CTRL_RX, VIRTIO_NET_F_CTRL_VLAN, \
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_MTU, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, \
+ VIRTIO_NET_F_MASTER
static unsigned int features[] = {
VIRTNET_FEATURES,
diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h
index fc353b518288..a9b4e0836786 100644
--- a/include/uapi/linux/virtio_net.h
+++ b/include/uapi/linux/virtio_net.h
@@ -56,6 +56,7 @@
#define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow
* Steering */
#define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */
+#define VIRTIO_NET_F_MASTER 62 /* act as master for a VF device */
Well the virtio hardware doesn't really know whether it's a master or
the slave of a bond. In fact quite possibly down the road we'll add a
virtual device on top as others seem to want to do - that other one will
be the master then.
And we do nothing do check it's a VF.
So maybe a better name would be
#define VIRTIO_NET_F_BACKUP 62 /* Act as backup for another device with the same MAC */
Yes. BACKUP does make more sense as virtio is only used as a BACKUP
datapath when the other
device is unplugged.
#ifndef VIRTIO_NET_NO_LEGACY
#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
--
2.14.3
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