dsa: add support for Trailer tagging format

This adds support for the Trailer switch tagging format.  This is
another tagging that doesn't explicitly mark tagged packets with a
distinct ethertype, so that we need to add a similar hack in the
receive path as for the Original DSA tagging format.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Tested-by: Byron Bradley <byron.bbradley@gmail.com>
Tested-by: Tim Ellis <tim.ellis@mac.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/if_ether.h b/include/linux/if_ether.h
index 32b9dcda68c7..a0099e98b5c4 100644
--- a/include/linux/if_ether.h
+++ b/include/linux/if_ether.h
@@ -102,6 +102,7 @@
 #define ETH_P_HDLC      0x0019          /* HDLC frames                  */
 #define ETH_P_ARCNET    0x001A          /* 1A for ArcNet :-)            */
 #define ETH_P_DSA       0x001B          /* Distributed Switch Arch.     */
+#define ETH_P_TRAILER   0x001C          /* Trailer switch tagging       */
 #define ETH_P_PHONET    0x00F5          /* Nokia Phonet frames          */
 
 /*