net: Add l3mdev rule

[deliverable/linux.git] / net / l3mdev / l3mdev.c

diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c
index 6651a78e100cdf987a5963fc84be5484221053ef..7da97809a7e894cc35e5e8aeaa860475a6894196 100644 (file)
--- a/net/l3mdev/l3mdev.c
+++ b/net/l3mdev/l3mdev.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/netdevice.h>
+#include <net/fib_rules.h>
 #include <net/l3mdev.h>
 
 /**
@@ -160,3 +161,40 @@ int l3mdev_get_saddr(struct net *net, int ifindex, struct flowi4 *fl4)
        return rc;
 }
 EXPORT_SYMBOL_GPL(l3mdev_get_saddr);
+
+/**
+ *     l3mdev_fib_rule_match - Determine if flowi references an
+ *                             L3 master device
+ *     @net: network namespace for device index lookup
+ *     @fl:  flow struct
+ */
+
+int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
+                         struct fib_lookup_arg *arg)
+{
+       struct net_device *dev;
+       int rc = 0;
+
+       rcu_read_lock();
+
+       dev = dev_get_by_index_rcu(net, fl->flowi_oif);
+       if (dev && netif_is_l3_master(dev) &&
+           dev->l3mdev_ops->l3mdev_fib_table) {
+               arg->table = dev->l3mdev_ops->l3mdev_fib_table(dev);
+               rc = 1;
+               goto out;
+       }
+
+       dev = dev_get_by_index_rcu(net, fl->flowi_iif);
+       if (dev && netif_is_l3_master(dev) &&
+           dev->l3mdev_ops->l3mdev_fib_table) {
+               arg->table = dev->l3mdev_ops->l3mdev_fib_table(dev);
+               rc = 1;
+               goto out;
+       }
+
+out:
+       rcu_read_unlock();
+
+       return rc;
+}