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net/ethernet: Add parse_protocol header_ops support

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The previous commit introduced parse_protocol callback which should
extract the protocol number from the L2 header. Make all Ethernet
devices support it.

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maxim Mikityanskiy 2019-02-21 12:39:59 +00:00 committed by David S. Miller
parent e78b291551
commit ace53b2e29
2 changed files with 14 additions and 0 deletions
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1
include/linux/etherdevice.h
View File

@ -44,6 +44,7 @@ int eth_header_cache(const struct neighbour *neigh, struct hh_cache *hh,
__be16 type);
void eth_header_cache_update(struct hh_cache *hh, const struct net_device *dev,
const unsigned char *haddr);
__be16 eth_header_parse_protocol(const struct sk_buff *skb);
int eth_prepare_mac_addr_change(struct net_device *dev, void *p);
void eth_commit_mac_addr_change(struct net_device *dev, void *p);
int eth_mac_addr(struct net_device *dev, void *p);

13
net/ethernet/eth.c
View File

@ -264,6 +264,18 @@ void eth_header_cache_update(struct hh_cache *hh,
}
EXPORT_SYMBOL(eth_header_cache_update);
/**
* eth_header_parser_protocol - extract protocol from L2 header
* @skb: packet to extract protocol from
*/
__be16 eth_header_parse_protocol(const struct sk_buff *skb)
{
const struct ethhdr *eth = eth_hdr(skb);
return eth->h_proto;
}
EXPORT_SYMBOL(eth_header_parse_protocol);
/**
* eth_prepare_mac_addr_change - prepare for mac change
* @dev: network device
@ -346,6 +358,7 @@ const struct header_ops eth_header_ops ____cacheline_aligned = {
.parse = eth_header_parse,
.cache = eth_header_cache,
.cache_update = eth_header_cache_update,
.parse_protocol = eth_header_parse_protocol,
};
/**