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[Qemu-devel] [PATCH v4 2/3] vhost-net: Notify the backend about the host
From: |
Maxime Coquelin |
Subject: |
[Qemu-devel] [PATCH v4 2/3] vhost-net: Notify the backend about the host MTU |
Date: |
Sat, 10 Dec 2016 16:30:37 +0100 |
This patch provides a way for virtio-net to notify the
backend about the host MTU set by the user.
Cc: Michael S. Tsirkin <address@hidden>
Cc: Aaron Conole <address@hidden>
Signed-off-by: Maxime Coquelin <address@hidden>
---
hw/net/vhost_net.c | 18 ++++++++++++++++++
include/net/vhost_net.h | 2 ++
2 files changed, 20 insertions(+)
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index f2d49ad..6280422 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -51,6 +51,7 @@ static const int kernel_feature_bits[] = {
VIRTIO_RING_F_EVENT_IDX,
VIRTIO_NET_F_MRG_RXBUF,
VIRTIO_F_VERSION_1,
+ VIRTIO_NET_F_MTU,
VHOST_INVALID_FEATURE_BIT
};
@@ -74,6 +75,7 @@ static const int user_feature_bits[] = {
VIRTIO_NET_F_HOST_ECN,
VIRTIO_NET_F_HOST_UFO,
VIRTIO_NET_F_MRG_RXBUF,
+ VIRTIO_NET_F_MTU,
/* This bit implies RARP isn't sent by QEMU out of band */
VIRTIO_NET_F_GUEST_ANNOUNCE,
@@ -435,6 +437,17 @@ int vhost_set_vring_enable(NetClientState *nc, int enable)
return 0;
}
+int vhost_net_set_mtu(struct vhost_net *net, uint16_t mtu)
+{
+ const VhostOps *vhost_ops = net->dev.vhost_ops;
+
+ if (!vhost_ops->vhost_net_set_mtu) {
+ return 0;
+ }
+
+ return vhost_ops->vhost_net_set_mtu(&net->dev, mtu);
+}
+
#else
uint64_t vhost_net_get_max_queues(VHostNetState *net)
{
@@ -501,4 +514,9 @@ int vhost_set_vring_enable(NetClientState *nc, int enable)
{
return 0;
}
+
+int vhost_net_set_mtu(struct vhost_net *net, uint16_t mtu)
+{
+ return 0;
+}
#endif
diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
index 5a08eff..afc1499 100644
--- a/include/net/vhost_net.h
+++ b/include/net/vhost_net.h
@@ -35,4 +35,6 @@ int vhost_set_vring_enable(NetClientState * nc, int enable);
uint64_t vhost_net_get_acked_features(VHostNetState *net);
+int vhost_net_set_mtu(struct vhost_net *net, uint16_t mtu);
+
#endif
--
2.9.3