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net: Add priority to packet_offload objects.

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When we scan a packet for GRO processing, we want to see the most
common packet types in the front of the offload_base list.

So add a priority field so we can handle this properly.

IPv4/IPv6 get the highest priority with the implicit zero priority
field.

Next comes ethernet with a priority of 10, and then we have the MPLS
types with a priority of 15.

Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Suggested-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2015-06-01 14:56:09 -07:00
parent 493be55ac3
commit bdef7de4b8
4 changed files with 10 additions and 2 deletions
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8
net/core/dev.c
View file

@ -469,10 +469,14 @@ EXPORT_SYMBOL(dev_remove_pack);
*/
void dev_add_offload(struct packet_offload *po)
{
struct list_head *head = &offload_base;
struct packet_offload *elem;
spin_lock(&offload_lock);
list_add_rcu(&po->list, head);
list_for_each_entry(elem, &offload_base, list) {
if (po->priority < elem->priority)
break;
}
list_add_rcu(&po->list, elem->list.prev);
spin_unlock(&offload_lock);
}
EXPORT_SYMBOL(dev_add_offload);