net: adjust skb_gso_segment() for calling in rx path

skb_gso_segment() is almost always called in tx path,
except for openvswitch. It calls this function when
it receives the packet and tries to queue it to user-space.
In this special case, the ->ip_summed check inside
skb_gso_segment() is no longer true, as ->ip_summed value
has different meanings on rx path.

This patch adjusts skb_gso_segment() so that we can at least
avoid such warnings on checksum.

Cc: Jesse Gross <jesse@nicira.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 2 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 85b0949d9946..ab2774eb49e8 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2662,8 +2662,15 @@ extern int netdev_master_upper_dev_link(struct net_device *dev,
 extern void netdev_upper_dev_unlink(struct net_device *dev,
                                     struct net_device *upper_dev);
 extern int skb_checksum_help(struct sk_buff *skb);
-extern struct sk_buff *skb_gso_segment(struct sk_buff *skb,
-        netdev_features_t features);
+extern struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
+        netdev_features_t features, bool tx_path);
+
+static inline
+struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
+{
+        return __skb_gso_segment(skb, features, true);
+}
+
 #ifdef CONFIG_BUG
 extern void netdev_rx_csum_fault(struct net_device *dev);
 #else