[PATCH v4 12/14] vhost_net: introduce set_config & get_config

[Cindy Lu <lulu@redhat.com>]

This patch introduces set_config & get_config  method which allows
vhost_net set/get the config to backend

Signed-off-by: Cindy Lu <lulu@redhat.com>
---
 hw/net/vhost_net-stub.c | 11 +++++++++++
 hw/net/vhost_net.c      | 10 ++++++++++
 include/net/vhost_net.h |  5 +++++
 3 files changed, 26 insertions(+)

diff --git a/hw/net/vhost_net-stub.c b/hw/net/vhost_net-stub.c
index aac0e98228..a7f4252630 100644
--- a/hw/net/vhost_net-stub.c
+++ b/hw/net/vhost_net-stub.c
@@ -52,6 +52,17 @@ uint64_t vhost_net_get_features(struct vhost_net *net, uint64_t features)
     return features;
 }
 
+int vhost_net_get_config(struct vhost_net *net,  uint8_t *config,
+                         uint32_t config_len)
+{
+    return 0;
+}
+int vhost_net_set_config(struct vhost_net *net, const uint8_t *data,
+                         uint32_t offset, uint32_t size, uint32_t flags)
+{
+    return 0;
+}
+
 void vhost_net_ack_features(struct vhost_net *net, uint64_t features)
 {
 }
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index 4096d64aaf..4561665f6b 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -110,6 +110,16 @@ uint64_t vhost_net_get_features(struct vhost_net *net, uint64_t features)
     return vhost_get_features(&net->dev, vhost_net_get_feature_bits(net),
             features);
 }
+int vhost_net_get_config(struct vhost_net *net,  uint8_t *config,
+                         uint32_t config_len)
+{
+    return vhost_dev_get_config(&net->dev, config, config_len);
+}
+int vhost_net_set_config(struct vhost_net *net, const uint8_t *data,
+                         uint32_t offset, uint32_t size, uint32_t flags)
+{
+    return vhost_dev_set_config(&net->dev, data, offset, size, flags);
+}
 
 void vhost_net_ack_features(struct vhost_net *net, uint64_t features)
 {
diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
index 77e47398c4..172b0051d8 100644
--- a/include/net/vhost_net.h
+++ b/include/net/vhost_net.h
@@ -28,6 +28,11 @@ void vhost_net_cleanup(VHostNetState *net);
 uint64_t vhost_net_get_features(VHostNetState *net, uint64_t features);
 void vhost_net_ack_features(VHostNetState *net, uint64_t features);
 
+int vhost_net_get_config(struct vhost_net *net,  uint8_t *config,
+                         uint32_t config_len);
+
+int vhost_net_set_config(struct vhost_net *net, const uint8_t *data,
+                         uint32_t offset, uint32_t size, uint32_t flags);
 bool vhost_net_virtqueue_pending(VHostNetState *net, int n);
 void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
                               int idx, bool mask);
-- 
2.21.1