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dsa: add support for Trailer tagging format

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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 <[email protected]>
Tested-by: Byron Bradley <[email protected]>
Tested-by: Tim Ellis <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Lennert Buytenhek 2008-10-07 13:46:07 +00:00 • committed by David S. Miller
commit 396138f03f
10 changed files with 164 additions and 0 deletions
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2
net/ethernet/eth.c
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@ -193,6 +193,8 @@ __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
*/
if (netdev_uses_dsa_tags(dev))
return htons(ETH_P_DSA);
if (netdev_uses_trailer_tags(dev))
return htons(ETH_P_TRAILER);
if (ntohs(eth->h_proto) >= 1536)
return eth->h_proto;