diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/fib_rules.c | 3 | ||||
| -rw-r--r-- | net/ipv6/fib6_rules.c | 3 | ||||
| -rw-r--r-- | net/l3mdev/l3mdev.c | 35 |
3 files changed, 41 insertions, 0 deletions
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c index 6e9ea69e5f75..770bebed6b28 100644 --- a/net/ipv4/fib_rules.c +++ b/net/ipv4/fib_rules.c @@ -56,6 +56,9 @@ int __fib_lookup(struct net *net, struct flowi4 *flp, }; int err; + /* update flow if oif or iif point to device enslaved to l3mdev */ + l3mdev_update_flow(net, flowi4_to_flowi(flp)); + err = fib_rules_lookup(net->ipv4.rules_ops, flowi4_to_flowi(flp), 0, &arg); #ifdef CONFIG_IP_ROUTE_CLASSID if (arg.rule) diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c index 5857c1fc8b67..eea23b57c6a5 100644 --- a/net/ipv6/fib6_rules.c +++ b/net/ipv6/fib6_rules.c @@ -38,6 +38,9 @@ struct dst_entry *fib6_rule_lookup(struct net *net, struct flowi6 *fl6, .flags = FIB_LOOKUP_NOREF, }; + /* update flow if oif or iif point to device enslaved to l3mdev */ + l3mdev_update_flow(net, flowi6_to_flowi(fl6)); + fib_rules_lookup(net->ipv6.fib6_rules_ops, flowi6_to_flowi(fl6), flags, &arg); diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c index c4a1c3e84e12..43610e5acc4e 100644 --- a/net/l3mdev/l3mdev.c +++ b/net/l3mdev/l3mdev.c @@ -222,3 +222,38 @@ out: return rc; } + +void l3mdev_update_flow(struct net *net, struct flowi *fl) +{ + struct net_device *dev; + int ifindex; + + rcu_read_lock(); + + if (fl->flowi_oif) { + dev = dev_get_by_index_rcu(net, fl->flowi_oif); + if (dev) { + ifindex = l3mdev_master_ifindex_rcu(dev); + if (ifindex) { + fl->flowi_oif = ifindex; + fl->flowi_flags |= FLOWI_FLAG_SKIP_NH_OIF; + goto out; + } + } + } + + if (fl->flowi_iif) { + dev = dev_get_by_index_rcu(net, fl->flowi_iif); + if (dev) { + ifindex = l3mdev_master_ifindex_rcu(dev); + if (ifindex) { + fl->flowi_iif = ifindex; + fl->flowi_flags |= FLOWI_FLAG_SKIP_NH_OIF; + } + } + } + +out: + rcu_read_unlock(); +} +EXPORT_SYMBOL_GPL(l3mdev_update_flow); |