ip4ip6: Support for GSO/GRO

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/inet_common.h b/include/net/inet_common.h
index 109e3ee..5d68342 100644 (file)
--- a/include/net/inet_common.h
+++ b/include/net/inet_common.h
@@ -39,6 +39,11 @@ int inet_ctl_sock_create(struct sock **sk, unsigned short family,
 int inet_recv_error(struct sock *sk, struct msghdr *msg, int len,
                    int *addr_len);
 
+struct sk_buff **inet_gro_receive(struct sk_buff **head, struct sk_buff *skb);
+int inet_gro_complete(struct sk_buff *skb, int nhoff);
+struct sk_buff *inet_gso_segment(struct sk_buff *skb,
+                                netdev_features_t features);
+
 static inline void inet_ctl_sock_destroy(struct sock *sk)
 {
        if (sk)

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 25040b1..377424e 100644 (file)
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1192,8 +1192,8 @@ int inet_sk_rebuild_header(struct sock *sk)
 }
 EXPORT_SYMBOL(inet_sk_rebuild_header);
 
-static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
-                                       netdev_features_t features)
+struct sk_buff *inet_gso_segment(struct sk_buff *skb,
+                                netdev_features_t features)
 {
        bool udpfrag = false, fixedid = false, encap;
        struct sk_buff *segs = ERR_PTR(-EINVAL);
@@ -1280,9 +1280,9 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
 out:
        return segs;
 }
+EXPORT_SYMBOL(inet_gso_segment);
 
-static struct sk_buff **inet_gro_receive(struct sk_buff **head,
-                                        struct sk_buff *skb)
+struct sk_buff **inet_gro_receive(struct sk_buff **head, struct sk_buff *skb)
 {
        const struct net_offload *ops;
        struct sk_buff **pp = NULL;
@@ -1398,6 +1398,7 @@ out:
 
        return pp;
 }
+EXPORT_SYMBOL(inet_gro_receive);
 
 static struct sk_buff **ipip_gro_receive(struct sk_buff **head,
                                         struct sk_buff *skb)
@@ -1449,7 +1450,7 @@ int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
        return -EINVAL;
 }
 
-static int inet_gro_complete(struct sk_buff *skb, int nhoff)
+int inet_gro_complete(struct sk_buff *skb, int nhoff)
 {
        __be16 newlen = htons(skb->len - nhoff);
        struct iphdr *iph = (struct iphdr *)(skb->data + nhoff);
@@ -1479,6 +1480,7 @@ out_unlock:
 
        return err;
 }
+EXPORT_SYMBOL(inet_gro_complete);
 
 static int ipip_gro_complete(struct sk_buff *skb, int nhoff)
 {

diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 332d6a0..22e90e5 100644 (file)
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -16,6 +16,7 @@
 
 #include <net/protocol.h>
 #include <net/ipv6.h>
+#include <net/inet_common.h>
 
 #include "ip6_offload.h"
 
@@ -268,6 +269,21 @@ static struct sk_buff **sit_ip6ip6_gro_receive(struct sk_buff **head,
        return ipv6_gro_receive(head, skb);
 }
 
+static struct sk_buff **ip4ip6_gro_receive(struct sk_buff **head,
+                                          struct sk_buff *skb)
+{
+       /* Common GRO receive for SIT and IP6IP6 */
+
+       if (NAPI_GRO_CB(skb)->encap_mark) {
+               NAPI_GRO_CB(skb)->flush = 1;
+               return NULL;
+       }
+
+       NAPI_GRO_CB(skb)->encap_mark = 1;
+
+       return inet_gro_receive(head, skb);
+}
+
 static int ipv6_gro_complete(struct sk_buff *skb, int nhoff)
 {
        const struct net_offload *ops;
@@ -307,6 +323,13 @@ static int ip6ip6_gro_complete(struct sk_buff *skb, int nhoff)
        return ipv6_gro_complete(skb, nhoff);
 }
 
+static int ip4ip6_gro_complete(struct sk_buff *skb, int nhoff)
+{
+       skb->encapsulation = 1;
+       skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP6;
+       return inet_gro_complete(skb, nhoff);
+}
+
 static struct packet_offload ipv6_packet_offload __read_mostly = {
        .type = cpu_to_be16(ETH_P_IPV6),
        .callbacks = {
@@ -324,6 +347,14 @@ static const struct net_offload sit_offload = {
        },
 };
 
+static const struct net_offload ip4ip6_offload = {
+       .callbacks = {
+               .gso_segment    = inet_gso_segment,
+               .gro_receive    = ip4ip6_gro_receive,
+               .gro_complete   = ip4ip6_gro_complete,
+       },
+};
+
 static const struct net_offload ip6ip6_offload = {
        .callbacks = {
                .gso_segment    = ipv6_gso_segment,
@@ -331,7 +362,6 @@ static const struct net_offload ip6ip6_offload = {
                .gro_complete   = ip6ip6_gro_complete,
        },
 };
-
 static int __init ipv6_offload_init(void)
 {
 
@@ -344,6 +374,7 @@ static int __init ipv6_offload_init(void)
 
        inet_add_offload(&sit_offload, IPPROTO_IPV6);
        inet6_add_offload(&ip6ip6_offload, IPPROTO_IPV6);
+       inet6_add_offload(&ip4ip6_offload, IPPROTO_IPIP);
 
        return 0;
 }

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index d26d226..823dad1 100644 (file)
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1188,6 +1188,11 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
        if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
                fl6.flowi6_mark = skb->mark;
 
+       if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6))
+               return -1;
+
+       skb_set_inner_ipproto(skb, IPPROTO_IPIP);
+
        err = ip6_tnl_xmit(skb, dev, dsfield, &fl6, encap_limit, &mtu,
                           IPPROTO_IPIP);
        if (err != 0) {