From a45253bf32bf49cdb2807bad212b84f5ab51ac26 Mon Sep 17 00:00:00 2001 From: Nicolas Dichtel Date: Thu, 2 Apr 2015 17:07:11 +0200 Subject: veth: set iflink to the peer veth Now that the peer netns is advertised in rtnl messages, we can set this property so that IFLA_LINK will advertise the peer ifindex. It allows the userland to get the full veth configuration. Signed-off-by: Nicolas Dichtel Signed-off-by: David S. Miller --- drivers/net/veth.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/net/veth.c b/drivers/net/veth.c index 4cca36ebc4fb..c8186ffda1a3 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -263,6 +263,20 @@ static void veth_poll_controller(struct net_device *dev) } #endif /* CONFIG_NET_POLL_CONTROLLER */ +static int veth_get_iflink(const struct net_device *dev) +{ + struct veth_priv *priv = netdev_priv(dev); + struct net_device *peer; + int iflink; + + rcu_read_lock(); + peer = rcu_dereference(priv->peer); + iflink = peer ? peer->ifindex : 0; + rcu_read_unlock(); + + return iflink; +} + static const struct net_device_ops veth_netdev_ops = { .ndo_init = veth_dev_init, .ndo_open = veth_open, @@ -275,6 +289,7 @@ static const struct net_device_ops veth_netdev_ops = { #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = veth_poll_controller, #endif + .ndo_get_iflink = veth_get_iflink, }; #define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ -- cgit v1.2.3-59-g8ed1b