veth: Showing peer of veth type dev in ip link (kernel side)

[firefly-linux-kernel-4.4.55.git] / drivers / net / veth.c

diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index eee1f19ef1e9397469e343133490ec6972b4bbdc..54187b9c0efc2508a6fc88b3d89fa699568e78b3 100644 (file)
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -434,6 +434,25 @@ static const struct nla_policy veth_policy[VETH_INFO_MAX + 1] = {
        [VETH_INFO_PEER]        = { .len = sizeof(struct ifinfomsg) },
 };
 
+static size_t veth_get_size(const struct net_device *dev)
+{
+       return nla_total_size(sizeof(u64)) + /* VETH_INFO_PEER */
+               0;
+}
+
+static int veth_fill_info(struct sk_buff *skb, const struct net_device *dev)
+{
+       struct veth_priv *priv = netdev_priv(dev);
+       struct net_device *peer = rtnl_dereference(priv->peer);
+       u64 peer_ifindex;
+
+       peer_ifindex = peer ? peer->ifindex : 0;
+       if (nla_put_u64(skb, VETH_INFO_PEER, peer_ifindex))
+               return -EMSGSIZE;
+
+       return 0;
+}
+
 static struct rtnl_link_ops veth_link_ops = {
        .kind           = DRV_NAME,
        .priv_size      = sizeof(struct veth_priv),
@@ -443,6 +462,8 @@ static struct rtnl_link_ops veth_link_ops = {
        .dellink        = veth_dellink,
        .policy         = veth_policy,
        .maxtype        = VETH_INFO_MAX,
+       .get_size       = veth_get_size,
+       .fill_info      = veth_fill_info,
 };
 
 /*