From 1ff23beebdd315fe4d16070c08c065e89d7debb3 Mon Sep 17 00:00:00 2001 From: David Ahern Date: Sat, 7 May 2016 16:49:00 -0700 Subject: net: l3mdev: Allow send on enslaved interface Allow udp and raw sockets to send by oif that is an enslaved interface versus the l3mdev/VRF device. For example, this allows BFD to use ifindex from IP_PKTINFO on a receive to send a response without the need to convert to the VRF index. It also allows ping and ping6 to work when specifying an enslaved interface (e.g., ping -I swp1 ) which is a natural use case. Signed-off-by: David Ahern Signed-off-by: David S. Miller --- net/l3mdev/l3mdev.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'net/l3mdev') diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c index 898d01e0f87b..6651a78e100c 100644 --- a/net/l3mdev/l3mdev.c +++ b/net/l3mdev/l3mdev.c @@ -112,12 +112,18 @@ struct dst_entry *l3mdev_get_rt6_dst(struct net *net, struct dst_entry *dst = NULL; struct net_device *dev; - dev = dev_get_by_index(net, fl6->flowi6_oif); - if (dev) { - if (netif_is_l3_master(dev) && + if (fl6->flowi6_oif) { + rcu_read_lock(); + + dev = dev_get_by_index_rcu(net, fl6->flowi6_oif); + if (dev && netif_is_l3_slave(dev)) + dev = netdev_master_upper_dev_get_rcu(dev); + + if (dev && netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_get_rt6_dst) dst = dev->l3mdev_ops->l3mdev_get_rt6_dst(dev, fl6); - dev_put(dev); + + rcu_read_unlock(); } return dst; @@ -141,6 +147,9 @@ int l3mdev_get_saddr(struct net *net, int ifindex, struct flowi4 *fl4) rcu_read_lock(); dev = dev_get_by_index_rcu(net, ifindex); + if (dev && netif_is_l3_slave(dev)) + dev = netdev_master_upper_dev_get_rcu(dev); + if (dev && netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_get_saddr) rc = dev->l3mdev_ops->l3mdev_get_saddr(dev, fl4); -- cgit