diff options
| author | David Ahern <dsa@cumulusnetworks.com> | 2016-05-07 16:49:00 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-09 22:33:52 -0400 |
| commit | 1ff23beebdd315fe4d16070c08c065e89d7debb3 (patch) | |
| tree | f82066e771ed276e9b9eb5f93b5b0f28ca1061a2 /net/l3mdev | |
| parent | 4a65896f94fa82370041823837cd75aac1186b54 (diff) | |
| download | lwn-1ff23beebdd315fe4d16070c08c065e89d7debb3.tar.gz lwn-1ff23beebdd315fe4d16070c08c065e89d7debb3.zip | |
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 <ip>) which is
a natural use case.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l3mdev')
| -rw-r--r-- | net/l3mdev/l3mdev.c | 17 |
1 files changed, 13 insertions, 4 deletions
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); |