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ipv4: gre: add GRO capability 

Add GRO capability to IPv4 GRE tunnels, using the gro_cells
infrastructure.

Tested using IPv4 and IPv6 TCP traffic inside this tunnel, and
checking GRO is building large packets.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2012-09-27 02:48:50 +00:00 committed by David S. Miller
parent c9e6bc644e
commit 60769a5dcd
2 changed files with 14 additions and 2 deletions
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3
include/net/ipip.h
View File

@ -2,6 +2,7 @@
#define __NET_IPIP_H 1
#include <linux/if_tunnel.h>
#include <net/gro_cells.h>
#include <net/ip.h>
/* Keep error state on tunnel for 30 sec */
@ -36,6 +37,8 @@ struct ip_tunnel {
#endif
struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */
unsigned int prl_count; /* # of entries in PRL */
struct gro_cells gro_cells;
};
struct ip_tunnel_prl_entry {

13
net/ipv4/ip_gre.c
View File

@ -740,8 +740,7 @@ static int ipgre_rcv(struct sk_buff *skb)
tstats->rx_bytes += skb->len;
u64_stats_update_end(&tstats->syncp);
netif_rx(skb);
gro_cells_receive(&tunnel->gro_cells, skb);
return 0;
}
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
@ -1319,6 +1318,9 @@ static const struct net_device_ops ipgre_netdev_ops = {
static void ipgre_dev_free(struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
gro_cells_destroy(&tunnel->gro_cells);
free_percpu(dev->tstats);
free_netdev(dev);
}
@ -1350,6 +1352,7 @@ static int ipgre_tunnel_init(struct net_device *dev)
{
struct ip_tunnel *tunnel;
struct iphdr *iph;
int err;
tunnel = netdev_priv(dev);
iph = &tunnel->parms.iph;
@ -1376,6 +1379,12 @@ static int ipgre_tunnel_init(struct net_device *dev)
if (!dev->tstats)
return -ENOMEM;
err = gro_cells_init(&tunnel->gro_cells, dev);
if (err) {
free_percpu(dev->tstats);
return err;
}
return 0;
}