1 files changed, 93 insertions, 40 deletions

diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 121d517bf91c..6b5391ab8346 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -80,8 +80,10 @@ EXPORT_SYMBOL(icmpv6msg_statistics);
  *
  *      On SMP we have one ICMP socket per-cpu.
  */
-static DEFINE_PER_CPU(struct socket *, __icmpv6_socket) = NULL;
-#define icmpv6_socket   __get_cpu_var(__icmpv6_socket)
+static inline struct sock *icmpv6_sk(struct net *net)
+{
+        return net->ipv6.icmp_sk[smp_processor_id()];
+}
 
 static int icmpv6_rcv(struct sk_buff *skb);
 
@@ -90,11 +92,11 @@ static struct inet6_protocol icmpv6_protocol = {
         .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
 };
 
-static __inline__ int icmpv6_xmit_lock(void)
+static __inline__ int icmpv6_xmit_lock(struct sock *sk)
 {
         local_bh_disable();
 
-        if (unlikely(!spin_trylock(&icmpv6_socket->sk->sk_lock.slock))) {
+        if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
                 /* This can happen if the output path (f.e. SIT or
                  * ip6ip6 tunnel) signals dst_link_failure() for an
                  * outgoing ICMP6 packet.
@@ -105,9 +107,9 @@ static __inline__ int icmpv6_xmit_lock(void)
         return 0;
 }
 
-static __inline__ void icmpv6_xmit_unlock(void)
+static __inline__ void icmpv6_xmit_unlock(struct sock *sk)
 {
-        spin_unlock_bh(&icmpv6_socket->sk->sk_lock.slock);
+        spin_unlock_bh(&sk->sk_lock.slock);
 }
 
 /*
@@ -161,6 +163,7 @@ static inline int icmpv6_xrlim_allow(struct sock *sk, int type,
                                      struct flowi *fl)
 {
         struct dst_entry *dst;
+        struct net *net = sk->sk_net;
         int res = 0;
 
         /* Informational messages are not limited. */
@@ -176,7 +179,7 @@ static inline int icmpv6_xrlim_allow(struct sock *sk, int type,
          * XXX: perhaps the expire for routing entries cloned by
          * this lookup should be more aggressive (not longer than timeout).
          */
-        dst = ip6_route_output(sk, fl);
+        dst = ip6_route_output(net, sk, fl);
         if (dst->error) {
                 IP6_INC_STATS(ip6_dst_idev(dst),
                               IPSTATS_MIB_OUTNOROUTES);
@@ -184,7 +187,7 @@ static inline int icmpv6_xrlim_allow(struct sock *sk, int type,
                 res = 1;
         } else {
                 struct rt6_info *rt = (struct rt6_info *)dst;
-                int tmo = init_net.ipv6.sysctl.icmpv6_time;
+                int tmo = net->ipv6.sysctl.icmpv6_time;
 
                 /* Give more bandwidth to wider prefixes. */
                 if (rt->rt6i_dst.plen < 128)
@@ -303,6 +306,7 @@ static inline void mip6_addr_swap(struct sk_buff *skb) {}
 void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
                  struct net_device *dev)
 {
+        struct net *net = skb->dev->nd_net;
         struct inet6_dev *idev = NULL;
         struct ipv6hdr *hdr = ipv6_hdr(skb);
         struct sock *sk;
@@ -332,7 +336,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
          */
         addr_type = ipv6_addr_type(&hdr->daddr);
 
-        if (ipv6_chk_addr(&init_net, &hdr->daddr, skb->dev, 0))
+        if (ipv6_chk_addr(net, &hdr->daddr, skb->dev, 0))
                 saddr = &hdr->daddr;
 
         /*
@@ -389,12 +393,12 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
         fl.fl_icmp_code = code;
         security_skb_classify_flow(skb, &fl);
 
-        if (icmpv6_xmit_lock())
-                return;
-
-        sk = icmpv6_socket->sk;
+        sk = icmpv6_sk(net);
         np = inet6_sk(sk);
 
+        if (icmpv6_xmit_lock(sk))
+                return;
+
         if (!icmpv6_xrlim_allow(sk, type, &fl))
                 goto out;
 
@@ -498,13 +502,14 @@ out_put:
 out_dst_release:
         dst_release(dst);
 out:
-        icmpv6_xmit_unlock();
+        icmpv6_xmit_unlock(sk);
 }
 
 EXPORT_SYMBOL(icmpv6_send);
 
 static void icmpv6_echo_reply(struct sk_buff *skb)
 {
+        struct net *net = skb->dev->nd_net;
         struct sock *sk;
         struct inet6_dev *idev;
         struct ipv6_pinfo *np;
@@ -535,12 +540,12 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
         fl.fl_icmp_type = ICMPV6_ECHO_REPLY;
         security_skb_classify_flow(skb, &fl);
 
-        if (icmpv6_xmit_lock())
-                return;
-
-        sk = icmpv6_socket->sk;
+        sk = icmpv6_sk(net);
         np = inet6_sk(sk);
 
+        if (icmpv6_xmit_lock(sk))
+                return;
+
         if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
                 fl.oif = np->mcast_oif;
 
@@ -584,7 +589,7 @@ out_put:
                 in6_dev_put(idev);
         dst_release(dst);
 out:
-        icmpv6_xmit_unlock();
+        icmpv6_xmit_unlock(sk);
 }
 
 static void icmpv6_notify(struct sk_buff *skb, int type, int code, __be32 info)
@@ -775,19 +780,41 @@ drop_no_count:
         return 0;
 }
 
+void icmpv6_flow_init(struct sock *sk, struct flowi *fl,
+                      u8 type,
+                      const struct in6_addr *saddr,
+                      const struct in6_addr *daddr,
+                      int oif)
+{
+        memset(fl, 0, sizeof(*fl));
+        ipv6_addr_copy(&fl->fl6_src, saddr);
+        ipv6_addr_copy(&fl->fl6_dst, daddr);
+        fl->proto               = IPPROTO_ICMPV6;
+        fl->fl_icmp_type        = type;
+        fl->fl_icmp_code        = 0;
+        fl->oif                 = oif;
+        security_sk_classify_flow(sk, fl);
+}
+
 /*
- * Special lock-class for __icmpv6_socket:
+ * Special lock-class for __icmpv6_sk:
  */
 static struct lock_class_key icmpv6_socket_sk_dst_lock_key;
 
-int __init icmpv6_init(struct net_proto_family *ops)
+static int __net_init icmpv6_sk_init(struct net *net)
 {
         struct sock *sk;
         int err, i, j;
 
+        net->ipv6.icmp_sk =
+                kzalloc(nr_cpu_ids * sizeof(struct sock *), GFP_KERNEL);
+        if (net->ipv6.icmp_sk == NULL)
+                return -ENOMEM;
+
         for_each_possible_cpu(i) {
+                struct socket *sock;
                 err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6,
-                                       &per_cpu(__icmpv6_socket, i));
+                                       &sock);
                 if (err < 0) {
                         printk(KERN_ERR
                                "Failed to initialize the ICMP6 control socket "
@@ -796,12 +823,14 @@ int __init icmpv6_init(struct net_proto_family *ops)
                         goto fail;
                 }
 
-                sk = per_cpu(__icmpv6_socket, i)->sk;
+                net->ipv6.icmp_sk[i] = sk = sock->sk;
+                sk_change_net(sk, net);
+
                 sk->sk_allocation = GFP_ATOMIC;
                 /*
                  * Split off their lock-class, because sk->sk_dst_lock
                  * gets used from softirqs, which is safe for
-                 * __icmpv6_socket (because those never get directly used
+                 * __icmpv6_sk (because those never get directly used
                  * via userspace syscalls), but unsafe for normal sockets.
                  */
                 lockdep_set_class(&sk->sk_dst_lock,
@@ -815,36 +844,56 @@ int __init icmpv6_init(struct net_proto_family *ops)
 
                 sk->sk_prot->unhash(sk);
         }
-
-
-        if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0) {
-                printk(KERN_ERR "Failed to register ICMP6 protocol\n");
-                err = -EAGAIN;
-                goto fail;
-        }
-
         return 0;
 
  fail:
-        for (j = 0; j < i; j++) {
-                if (!cpu_possible(j))
-                        continue;
-                sock_release(per_cpu(__icmpv6_socket, j));
-        }
-
+        for (j = 0; j < i; j++)
+                sk_release_kernel(net->ipv6.icmp_sk[j]);
+        kfree(net->ipv6.icmp_sk);
         return err;
 }
 
-void icmpv6_cleanup(void)
+static void __net_exit icmpv6_sk_exit(struct net *net)
 {
         int i;
 
         for_each_possible_cpu(i) {
-                sock_release(per_cpu(__icmpv6_socket, i));
+                sk_release_kernel(net->ipv6.icmp_sk[i]);
         }
+        kfree(net->ipv6.icmp_sk);
+}
+
+static struct pernet_operations icmpv6_sk_ops = {
+       .init = icmpv6_sk_init,
+       .exit = icmpv6_sk_exit,
+};
+
+int __init icmpv6_init(void)
+{
+        int err;
+
+        err = register_pernet_subsys(&icmpv6_sk_ops);
+        if (err < 0)
+                return err;
+
+        err = -EAGAIN;
+        if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0)
+                goto fail;
+        return 0;
+
+fail:
+        printk(KERN_ERR "Failed to register ICMP6 protocol\n");
+        unregister_pernet_subsys(&icmpv6_sk_ops);
+        return err;
+}
+
+void icmpv6_cleanup(void)
+{
+        unregister_pernet_subsys(&icmpv6_sk_ops);
         inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
 }
 
+
 static const struct icmp6_err {
         int err;
         int fatal;
@@ -925,6 +974,10 @@ struct ctl_table *ipv6_icmp_sysctl_init(struct net *net)
         table = kmemdup(ipv6_icmp_table_template,
                         sizeof(ipv6_icmp_table_template),
                         GFP_KERNEL);
+
+        if (table)
+                table[0].data = &net->ipv6.sysctl.icmpv6_time;
+
         return table;
 }
 #endif