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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 <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>
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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10
include/linux/netdevice.h
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@ -812,6 +812,16 @@ static inline bool netdev_uses_dsa_tags(struct net_device *dev)
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