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Diffstat (limited to 'net/l3mdev/l3mdev.c')
-rw-r--r--net/l3mdev/l3mdev.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c
index e925037fa..6651a78e1 100644
--- a/net/l3mdev/l3mdev.c
+++ b/net/l3mdev/l3mdev.c
@@ -97,3 +97,66 @@ u32 l3mdev_fib_table_by_index(struct net *net, int ifindex)
return tb_id;
}
EXPORT_SYMBOL_GPL(l3mdev_fib_table_by_index);
+
+/**
+ * l3mdev_get_rt6_dst - IPv6 route lookup based on flow. Returns
+ * cached route for L3 master device if relevant
+ * to flow
+ * @net: network namespace for device index lookup
+ * @fl6: IPv6 flow struct for lookup
+ */
+
+struct dst_entry *l3mdev_get_rt6_dst(struct net *net,
+ const struct flowi6 *fl6)
+{
+ struct dst_entry *dst = NULL;
+ struct net_device *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);
+
+ rcu_read_unlock();
+ }
+
+ return dst;
+}
+EXPORT_SYMBOL_GPL(l3mdev_get_rt6_dst);
+
+/**
+ * l3mdev_get_saddr - get source address for a flow based on an interface
+ * enslaved to an L3 master device
+ * @net: network namespace for device index lookup
+ * @ifindex: Interface index
+ * @fl4: IPv4 flow struct
+ */
+
+int l3mdev_get_saddr(struct net *net, int ifindex, struct flowi4 *fl4)
+{
+ struct net_device *dev;
+ int rc = 0;
+
+ if (ifindex) {
+ 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);
+
+ rcu_read_unlock();
+ }
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(l3mdev_get_saddr);