Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[karo-tx-linux.git] / net / core / dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index 1225b4be8ed6e5b419bc7789e75a75b3339eb7ba..13f49f81ae13a3e3f07b3304b8f04bcb791d84b3 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -99,6 +99,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/stat.h>
 #include <net/dst.h>
+#include <net/dst_metadata.h>
 #include <net/pkt_sched.h>
 #include <net/checksum.h>
 #include <net/xfrm.h>
@@ -681,6 +682,32 @@ int dev_get_iflink(const struct net_device *dev)
 }
 EXPORT_SYMBOL(dev_get_iflink);
 
+/**
+ *     dev_fill_metadata_dst - Retrieve tunnel egress information.
+ *     @dev: targeted interface
+ *     @skb: The packet.
+ *
+ *     For better visibility of tunnel traffic OVS needs to retrieve
+ *     egress tunnel information for a packet. Following API allows
+ *     user to get this info.
+ */
+int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb)
+{
+       struct ip_tunnel_info *info;
+
+       if (!dev->netdev_ops  || !dev->netdev_ops->ndo_fill_metadata_dst)
+               return -EINVAL;
+
+       info = skb_tunnel_info_unclone(skb);
+       if (!info)
+               return -ENOMEM;
+       if (unlikely(!(info->mode & IP_TUNNEL_INFO_TX)))
+               return -EINVAL;
+
+       return dev->netdev_ops->ndo_fill_metadata_dst(dev, skb);
+}
+EXPORT_SYMBOL_GPL(dev_fill_metadata_dst);
+
 /**
  *     __dev_get_by_name       - find a device by its name
  *     @net: the applicable net namespace