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 | |
| parent | 4a65896f94fa82370041823837cd75aac1186b54 (diff) | |
| download | linux-1ff23beebdd315fe4d16070c08c065e89d7debb3.tar.bz2 | |
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>
| -rw-r--r-- | drivers/net/vrf.c | 2 | ||||
| -rw-r--r-- | net/ipv4/route.c | 4 | ||||
| -rw-r--r-- | net/l3mdev/l3mdev.c | 17 |
3 files changed, 19 insertions, 4 deletions
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 4b2461ae5d3b..c8db55aa8280 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -648,6 +648,8 @@ static int vrf_get_saddr(struct net_device *dev, struct flowi4 *fl4) fl4->flowi4_flags |= FLOWI_FLAG_SKIP_NH_OIF; fl4->flowi4_iif = LOOPBACK_IFINDEX; + /* make sure oif is set to VRF device for lookup */ + fl4->flowi4_oif = dev->ifindex; fl4->flowi4_tos = tos & IPTOS_RT_MASK; fl4->flowi4_scope = ((tos & RTO_ONLINK) ? RT_SCOPE_LINK : RT_SCOPE_UNIVERSE); diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 8c8c655bb2c4..a1f2830d8110 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2146,6 +2146,7 @@ struct rtable *__ip_route_output_key_hash(struct net *net, struct flowi4 *fl4, unsigned int flags = 0; struct fib_result res; struct rtable *rth; + int master_idx; int orig_oif; int err = -ENETUNREACH; @@ -2155,6 +2156,9 @@ struct rtable *__ip_route_output_key_hash(struct net *net, struct flowi4 *fl4, orig_oif = fl4->flowi4_oif; + master_idx = l3mdev_master_ifindex_by_index(net, fl4->flowi4_oif); + if (master_idx) + fl4->flowi4_oif = master_idx; fl4->flowi4_iif = LOOPBACK_IFINDEX; fl4->flowi4_tos = tos & IPTOS_RT_MASK; fl4->flowi4_scope = ((tos & RTO_ONLINK) ? 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); |