target/linux/mediatek/patches-4.9/0039-net-next-dsa-add-flow_dissect-callback-to-struct-dsa.patch

   1 From 22e8b65ea4bf8a1fa757137bdcbdefe505fa4044 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <john@phrozen.org>
   3 Date: Mon, 7 Aug 2017 16:35:43 +0200
   4 Subject: [PATCH 39/57] net-next: dsa: add flow_dissect callback to struct
   5  dsa_device_ops
   6
   7 When the flow dissector first sees packets coming in on a DSA devices the
   8 802.3 header wont be located where the code expects it to be as the tag
   9 is still present. Adding this new callback allows a DSA device to provide a
  10 new function that the flow_disscetor can use to get the correct offsets
  11 for the protocol field and network header offset.
  12
  13 Signed-off-by: John Crispin <john@phrozen.org>
  14 ---
  15  include/net/dsa.h | 4 +++-
  16  1 file changed, 3 insertions(+), 1 deletion(-)
  17
  18 --- a/include/net/dsa.h
  19 +++ b/include/net/dsa.h
  20 @@ -90,9 +90,11 @@ struct packet_type;
  21
  22  struct dsa_device_ops {
  23         struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
  24 -       int sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
  25 +       int (*rcv)(struct sk_buff *skb, struct net_device *dev,
  26                                struct packet_type *pt,
  27                                struct net_device *orig_dev);
  28 +       int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
  29 +                           int *offset);
  30  };
  31
  32  struct dsa_switch_tree {