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>
diff --git a/include/linux/if_ether.h b/include/linux/if_ether.h
index 32b9dcd..a0099e9 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 */
/*
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 97f0c64..d3ea3de 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -812,6 +812,16 @@
return 0;
}
+static inline bool netdev_uses_trailer_tags(struct net_device *dev)
+{
+#ifdef CONFIG_NET_DSA_TAG_TRAILER
+ if (dev->dsa_ptr != NULL)
+ return dsa_uses_trailer_tags(dev->dsa_ptr);
+#endif
+
+ return 0;
+}
+
/**
* netdev_priv - access network device private data
* @dev: network device
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 72e509b..52e97bf 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -31,6 +31,7 @@
};
extern bool dsa_uses_dsa_tags(void *dsa_ptr);
+extern bool dsa_uses_trailer_tags(void *dsa_ptr);
#endif
