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>
diff --git a/include/net/ipip.h b/include/net/ipip.h
index a93cf6d..ddc077c 100644
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -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 @@
#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 {
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index ef0b861..b1871d9 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -740,8 +740,7 @@
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 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 @@
{
struct ip_tunnel *tunnel;
struct iphdr *iph;
+ int err;
tunnel = netdev_priv(dev);
iph = &tunnel->parms.iph;
@@ -1376,6 +1379,12 @@
if (!dev->tstats)
return -ENOMEM;
+ err = gro_cells_init(&tunnel->gro_cells, dev);
+ if (err) {
+ free_percpu(dev->tstats);
+ return err;
+ }
+
return 0;
}
