[PATCH v3 2/4] virtio-net: Expose MAX_VLAN

[Hawkins Jiawei]

vhost-vdpa shadowed CVQ needs to know the maximum number of
vlans supported by the virtio-net device, so QEMU can restore
the VLAN state in a migration.

Co-developed-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Hawkins Jiawei <yin31149@gmail.com>
---
 hw/net/virtio-net.c            | 2 --
 include/hw/virtio/virtio-net.h | 6 ++++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index d20d5a63cd..a32672039d 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -49,8 +49,6 @@
 
 #define VIRTIO_NET_VM_VERSION    11
 
-#define MAX_VLAN    (1 << 12)   /* Per 802.1Q definition */
-
 /* previously fixed value */
 #define VIRTIO_NET_RX_QUEUE_DEFAULT_SIZE 256
 #define VIRTIO_NET_TX_QUEUE_DEFAULT_SIZE 256
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index 5f5dcb4572..93f3bb5d97 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -38,6 +38,12 @@ OBJECT_DECLARE_SIMPLE_TYPE(VirtIONet, VIRTIO_NET)
 /* Maximum VIRTIO_NET_CTRL_MAC_TABLE_SET unicast + multicast entries. */
 #define MAC_TABLE_ENTRIES    64
 
+/*
+ * The maximum number of VLANs in the VLAN filter table
+ * added by VIRTIO_NET_CTRL_VLAN_ADD
+ */
+#define MAX_VLAN    (1 << 12)   /* Per 802.1Q definition */
+
 typedef struct virtio_net_conf
 {
     uint32_t txtimer;
-- 
2.25.1