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eth: Pull header from first fragment via eth_get_headlen 

We want to try and pull the L4 header in if it is available in the first
fragment.  As such add the flag to indicate we want to pull the headers on
the first fragment in.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Acked-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2016-02-24 09:30:04 -08:00 committed by David S. Miller
parent b3c3106ce3
commit d975ddd696
1 changed files with 2 additions and 1 deletions
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3
net/ethernet/eth.c
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@ -125,6 +125,7 @@ EXPORT_SYMBOL(eth_header);
*/
u32 eth_get_headlen(void *data, unsigned int len)
{
const unsigned int flags = FLOW_DISSECTOR_F_PARSE_1ST_FRAG;
const struct ethhdr *eth = (const struct ethhdr *)data;
struct flow_keys keys;
@ -134,7 +135,7 @@ u32 eth_get_headlen(void *data, unsigned int len)
/* parse any remaining L2/L3 headers, check for L4 */
if (!skb_flow_dissect_flow_keys_buf(&keys, data, eth->h_proto,
sizeof(*eth), len, 0))
sizeof(*eth), len, flags))
return max_t(u32, keys.control.thoff, sizeof(*eth));
/* parse for any L4 headers */