Commit bdef7de4 authored by David S. Miller's avatar David S. Miller
Browse files

net: Add priority to packet_offload objects. 



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: default avatarEric Dumazet <eric.dumazet@gmail.com>
Suggested-by: default avatarToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 493be55a

include/linux/netdevice.h

+1 −0
Original line number Diff line number Diff line
@@ -1997,6 +1997,7 @@ struct offload_callbacks { 


struct packet_offload {

	__be16			 type;	/* This is really htons(ether_type). */

	u16			 priority;

	struct offload_callbacks callbacks;

	struct list_head	 list;

};

net/core/dev.c

+6 −2
Original line number Diff line number Diff line
@@ -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);

net/ethernet/eth.c

+1 −0
Original line number Diff line number Diff line
@@ -470,6 +470,7 @@ EXPORT_SYMBOL(eth_gro_complete); 


static struct packet_offload eth_packet_offload __read_mostly = {

	.type = cpu_to_be16(ETH_P_TEB),

	.priority = 10,

	.callbacks = {

		.gro_receive = eth_gro_receive,

		.gro_complete = eth_gro_complete,

net/mpls/mpls_gso.c

+2 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ out: 


static struct packet_offload mpls_mc_offload __read_mostly = {

	.type = cpu_to_be16(ETH_P_MPLS_MC),

	.priority = 15,

	.callbacks = {

		.gso_segment    =	mpls_gso_segment,

	},
@@ -69,6 +70,7 @@ static struct packet_offload mpls_mc_offload __read_mostly = { 


static struct packet_offload mpls_uc_offload __read_mostly = {

	.type = cpu_to_be16(ETH_P_MPLS_UC),

	.priority = 15,

	.callbacks = {

		.gso_segment    =	mpls_gso_segment,

	},

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