ipv6: Switch to using new offload infrastructure.

Switch IPv6 protocol to using the new GRO/GSO calls and data.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 64 insertions, 32 deletions

diff --git a/include/net/protocol.h b/include/net/protocol.h
index 3bb70510b686..7019c1637848 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -54,14 +54,6 @@ struct inet6_protocol {
                                struct inet6_skb_parm *opt,
                                u8 type, u8 code, int offset,
                                __be32 info);
-
-        int     (*gso_send_check)(struct sk_buff *skb);
-        struct sk_buff *(*gso_segment)(struct sk_buff *skb,
-                                       netdev_features_t features);
-        struct sk_buff **(*gro_receive)(struct sk_buff **head,
-                                        struct sk_buff *skb);
-        int     (*gro_complete)(struct sk_buff *skb);
-
         unsigned int    flags;  /* INET6_PROTO_xxx */
 };
 
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 6e245177608c..eb63dac68728 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -701,14 +701,14 @@ EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
 
 static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
 {
-        const struct inet6_protocol *ops = NULL;
+        const struct net_offload *ops = NULL;
 
         for (;;) {
                 struct ipv6_opt_hdr *opth;
                 int len;
 
                 if (proto != NEXTHDR_HOP) {
-                        ops = rcu_dereference(inet6_protos[proto]);
+                        ops = rcu_dereference(inet6_offloads[proto]);
 
                         if (unlikely(!ops))
                                 break;
@@ -736,7 +736,7 @@ static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
 static int ipv6_gso_send_check(struct sk_buff *skb)
 {
         const struct ipv6hdr *ipv6h;
-        const struct inet6_protocol *ops;
+        const struct net_offload *ops;
         int err = -EINVAL;
 
         if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
@@ -747,7 +747,7 @@ static int ipv6_gso_send_check(struct sk_buff *skb)
         err = -EPROTONOSUPPORT;
 
         rcu_read_lock();
-        ops = rcu_dereference(inet6_protos[
+        ops = rcu_dereference(inet6_offloads[
                 ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]);
 
         if (likely(ops && ops->gso_send_check)) {
@@ -765,7 +765,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
 {
         struct sk_buff *segs = ERR_PTR(-EINVAL);
         struct ipv6hdr *ipv6h;
-        const struct inet6_protocol *ops;
+        const struct net_offload *ops;
         int proto;
         struct frag_hdr *fptr;
         unsigned int unfrag_ip6hlen;
@@ -792,7 +792,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
 
         proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
         rcu_read_lock();
-        ops = rcu_dereference(inet6_protos[proto]);
+        ops = rcu_dereference(inet6_offloads[proto]);
         if (likely(ops && ops->gso_segment)) {
                 skb_reset_transport_header(skb);
                 segs = ops->gso_segment(skb, features);
@@ -825,7 +825,7 @@ out:
 static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
                                          struct sk_buff *skb)
 {
-        const struct inet6_protocol *ops;
+        const struct net_offload *ops;
         struct sk_buff **pp = NULL;
         struct sk_buff *p;
         struct ipv6hdr *iph;
@@ -852,7 +852,7 @@ static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
 
         rcu_read_lock();
         proto = iph->nexthdr;
-        ops = rcu_dereference(inet6_protos[proto]);
+        ops = rcu_dereference(inet6_offloads[proto]);
         if (!ops || !ops->gro_receive) {
                 __pskb_pull(skb, skb_gro_offset(skb));
                 proto = ipv6_gso_pull_exthdrs(skb, proto);
@@ -860,7 +860,7 @@ static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
                 skb_reset_transport_header(skb);
                 __skb_push(skb, skb_gro_offset(skb));
 
-                ops = rcu_dereference(inet6_protos[proto]);
+                ops = rcu_dereference(inet6_offloads[proto]);
                 if (!ops || !ops->gro_receive)
                         goto out_unlock;
 
@@ -915,7 +915,7 @@ out:
 
 static int ipv6_gro_complete(struct sk_buff *skb)
 {
-        const struct inet6_protocol *ops;
+        const struct net_offload *ops;
         struct ipv6hdr *iph = ipv6_hdr(skb);
         int err = -ENOSYS;
 
@@ -923,7 +923,7 @@ static int ipv6_gro_complete(struct sk_buff *skb)
                                  sizeof(*iph));
 
         rcu_read_lock();
-        ops = rcu_dereference(inet6_protos[NAPI_GRO_CB(skb)->proto]);
+        ops = rcu_dereference(inet6_offloads[NAPI_GRO_CB(skb)->proto]);
         if (WARN_ON(!ops || !ops->gro_complete))
                 goto out_unlock;
 
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index cb6f0828ca44..de6559e3aa0a 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -549,14 +549,44 @@ static const struct inet6_protocol nodata_protocol = {
         .flags          =       INET6_PROTO_NOPOLICY,
 };
 
+static int ipv6_exthdrs_offload_init(void)
+{
+        int ret;
+
+        ret = inet6_add_offload(&rthdr_offload, IPPROTO_ROUTING);
+        if (!ret)
+                goto out;
+
+        ret = inet6_add_offload(&dstopt_offload, IPPROTO_DSTOPTS);
+        if (!ret)
+                goto out_rt;
+
+out:
+        return ret;
+
+out_rt:
+        inet_del_offload(&rthdr_offload, IPPROTO_ROUTING);
+        goto out;
+}
+
+static void ipv6_exthdrs_offload_exit(void)
+{
+        inet_del_offload(&rthdr_offload, IPPROTO_ROUTING);
+        inet_del_offload(&rthdr_offload, IPPROTO_DSTOPTS);
+}
+
 int __init ipv6_exthdrs_init(void)
 {
         int ret;
 
-        ret = inet6_add_protocol(&rthdr_protocol, IPPROTO_ROUTING);
+        ret = ipv6_exthdrs_offload_init();
         if (ret)
                 goto out;
 
+        ret = inet6_add_protocol(&rthdr_protocol, IPPROTO_ROUTING);
+        if (ret)
+                goto out_offload;
+
         ret = inet6_add_protocol(&destopt_protocol, IPPROTO_DSTOPTS);
         if (ret)
                 goto out_rthdr;
@@ -567,10 +597,12 @@ int __init ipv6_exthdrs_init(void)
 
 out:
         return ret;
-out_rthdr:
-        inet6_del_protocol(&rthdr_protocol, IPPROTO_ROUTING);
 out_destopt:
         inet6_del_protocol(&destopt_protocol, IPPROTO_DSTOPTS);
+out_rthdr:
+        inet6_del_protocol(&rthdr_protocol, IPPROTO_ROUTING);
+out_offload:
+        ipv6_exthdrs_offload_exit();
         goto out;
 };
 
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 6884a95be433..635206e8987e 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -2066,10 +2066,6 @@ static const struct inet6_protocol tcpv6_protocol = {
         .early_demux    =       tcp_v6_early_demux,
         .handler        =       tcp_v6_rcv,
         .err_handler    =       tcp_v6_err,
-        .gso_send_check =       tcp_v6_gso_send_check,
-        .gso_segment    =       tcp_tso_segment,
-        .gro_receive    =       tcp6_gro_receive,
-        .gro_complete   =       tcp6_gro_complete,
         .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
 };
 
@@ -2116,10 +2112,14 @@ int __init tcpv6_init(void)
 {
         int ret;
 
-        ret = inet6_add_protocol(&tcpv6_protocol, IPPROTO_TCP);
+        ret = inet6_add_offload(&tcpv6_offload, IPPROTO_TCP);
         if (ret)
                 goto out;
 
+        ret = inet6_add_protocol(&tcpv6_protocol, IPPROTO_TCP);
+        if (ret)
+                goto out_offload;
+
         /* register inet6 protocol */
         ret = inet6_register_protosw(&tcpv6_protosw);
         if (ret)
@@ -2131,10 +2131,12 @@ int __init tcpv6_init(void)
 out:
         return ret;
 
-out_tcpv6_protocol:
-        inet6_del_protocol(&tcpv6_protocol, IPPROTO_TCP);
 out_tcpv6_protosw:
         inet6_unregister_protosw(&tcpv6_protosw);
+out_tcpv6_protocol:
+        inet6_del_protocol(&tcpv6_protocol, IPPROTO_TCP);
+out_offload:
+        inet6_del_offload(&tcpv6_offload, IPPROTO_TCP);
         goto out;
 }
 
@@ -2143,4 +2145,5 @@ void tcpv6_exit(void)
         unregister_pernet_subsys(&tcpv6_net_ops);
         inet6_unregister_protosw(&tcpv6_protosw);
         inet6_del_protocol(&tcpv6_protocol, IPPROTO_TCP);
+        inet6_del_offload(&tcpv6_offload, IPPROTO_TCP);
 }
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 3ad44e176503..e4cc1f41012d 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1438,8 +1438,6 @@ out:
 static const struct inet6_protocol udpv6_protocol = {
         .handler        =       udpv6_rcv,
         .err_handler    =       udpv6_err,
-        .gso_send_check =       udp6_ufo_send_check,
-        .gso_segment    =       udp6_ufo_fragment,
         .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
 };
 
@@ -1570,10 +1568,14 @@ int __init udpv6_init(void)
 {
         int ret;
 
-        ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP);
+        ret = inet6_add_offload(&udpv6_offload, IPPROTO_UDP);
         if (ret)
                 goto out;
 
+        ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP);
+        if (ret)
+                goto out_offload;
+
         ret = inet6_register_protosw(&udpv6_protosw);
         if (ret)
                 goto out_udpv6_protocol;
@@ -1582,6 +1584,8 @@ out:
 
 out_udpv6_protocol:
         inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
+out_offload:
+        inet6_del_offload(&udpv6_offload, IPPROTO_UDP);
         goto out;
 }
 
@@ -1589,4 +1593,5 @@ void udpv6_exit(void)
 {
         inet6_unregister_protosw(&udpv6_protosw);
         inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
+        inet6_del_offload(&udpv6_offload, IPPROTO_UDP);
 }