From: Eran Ben Elisha <era...@mellanox.com>
Add GRO capability for IPv6 GRE tunnel and ip6erspan tap, via gro_cells
infrastructure.
Performance testing: 55% higher badwidth.
Measuring bandwidth of 1 thread IPv4 TCP traffic over IPv6 GRE tunnel
while GRO on the physical interface is disabled.
CPU: Intel Xeon E312xx (Sandy Bridge)
NIC: Mellanox Technologies MT27700 Family [ConnectX-4]
Before (GRO not working in tunnel) : 2.47 Gbits/sec
After (GRO working in tunnel) : 3.85 Gbits/sec
Signed-off-by: Eran Ben Elisha <era...@mellanox.com>
Signed-off-by: Tariq Toukan <tar...@mellanox.com>
CC: Eric Dumazet <eduma...@google.com>
---
net/ipv6/ip6_gre.c | 37 +++++++++++++++++++++++++++----------
1 file changed, 27 insertions(+), 10 deletions(-)
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 22e86557aca4..8abc9d72993e 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -1306,6 +1306,7 @@ static void ip6gre_dev_free(struct net_device *dev)
{
struct ip6_tnl *t = netdev_priv(dev);
+ gro_cells_destroy(&t->gro_cells);
dst_cache_destroy(&t->dst_cache);
free_percpu(dev->tstats);
}
@@ -1373,11 +1374,12 @@ static int ip6gre_tunnel_init_common(struct net_device
*dev)
return -ENOMEM;
ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL);
- if (ret) {
- free_percpu(dev->tstats);
- dev->tstats = NULL;
- return ret;
- }
+ if (ret)
+ goto cleanup_alloc_pcpu_stats;
+
+ ret = gro_cells_init(&tunnel->gro_cells, dev);
+ if (ret)
+ goto cleanup_dst_cache_init;
tunnel->tun_hlen = gre_calc_hlen(tunnel->parms.o_flags);
tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen;
@@ -1397,6 +1399,13 @@ static int ip6gre_tunnel_init_common(struct net_device
*dev)
ip6gre_tnl_init_features(dev);
return 0;
+
+cleanup_dst_cache_init:
+ dst_cache_destroy(&tunnel->dst_cache);
+cleanup_alloc_pcpu_stats:
+ free_percpu(dev->tstats);
+ dev->tstats = NULL;
+ return ret;
}
static int ip6gre_tunnel_init(struct net_device *dev)
@@ -1743,11 +1752,12 @@ static int ip6erspan_tap_init(struct net_device *dev)
return -ENOMEM;
ret = dst_cache_init(&tunnel->dst_cache, GFP_KERNEL);
- if (ret) {
- free_percpu(dev->tstats);
- dev->tstats = NULL;
- return ret;
- }
+ if (ret)
+ goto cleanup_alloc_pcpu_stats;
+
+ ret = gro_cells_init(&tunnel->gro_cells, dev);
+ if (ret)
+ goto cleanup_dst_cache_init;
tunnel->tun_hlen = 8;
tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen +
@@ -1766,6 +1776,13 @@ static int ip6erspan_tap_init(struct net_device *dev)
ip6gre_tnl_link_config(tunnel, 1);
return 0;
+
+cleanup_dst_cache_init:
+ dst_cache_destroy(&tunnel->dst_cache);
+cleanup_alloc_pcpu_stats:
+ free_percpu(dev->tstats);
+ dev->tstats = NULL;
+ return ret;
}
static const struct net_device_ops ip6erspan_netdev_ops = {
--
1.8.3.1
