[NET]: Make all initialized struct seq_operations const.

[net-next-2.6.git] / net / ipv6 / raw.c

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 2b3be68b70a7ee6d8f2ae912de4dbd1600f5ab89..e27383d855dedfeffc1855ec906ea2522c8344e2 100644 (file)
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -49,7 +49,7 @@
 #include <net/udp.h>
 #include <net/inet_common.h>
 #include <net/tcp_states.h>
-#ifdef CONFIG_IPV6_MIP6
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 #include <net/mip6.h>
 #endif
 
@@ -137,6 +137,28 @@ static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
        return 0;
 }
 
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+static int (*mh_filter)(struct sock *sock, struct sk_buff *skb);
+
+int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
+                                          struct sk_buff *skb))
+{
+       rcu_assign_pointer(mh_filter, filter);
+       return 0;
+}
+EXPORT_SYMBOL(rawv6_mh_filter_register);
+
+int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
+                                            struct sk_buff *skb))
+{
+       rcu_assign_pointer(mh_filter, NULL);
+       synchronize_rcu();
+       return 0;
+}
+EXPORT_SYMBOL(rawv6_mh_filter_unregister);
+
+#endif
+
 /*
  *     demultiplex raw sockets.
  *     (should consider queueing the skb in the sock receive_queue
@@ -178,16 +200,22 @@ int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
                case IPPROTO_ICMPV6:
                        filtered = icmpv6_filter(sk, skb);
                        break;
-#ifdef CONFIG_IPV6_MIP6
+
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
                case IPPROTO_MH:
+               {
                        /* XXX: To validate MH only once for each packet,
                         * this is placed here. It should be after checking
                         * xfrm policy, however it doesn't. The checking xfrm
                         * policy is placed in rawv6_rcv() because it is
                         * required for each socket.
                         */
-                       filtered = mip6_mh_filter(sk, skb);
+                       int (*filter)(struct sock *sock, struct sk_buff *skb);
+
+                       filter = rcu_dereference(mh_filter);
+                       filtered = filter ? filter(sk, skb) : 0;
                        break;
+               }
 #endif
                default:
                        filtered = 0;
@@ -368,7 +396,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
                                     skb->len, inet->num, skb->csum))
                        skb->ip_summed = CHECKSUM_UNNECESSARY;
        }
-       if (skb->ip_summed != CHECKSUM_UNNECESSARY)
+       if (!skb_csum_unnecessary(skb))
                skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
                                                         &ipv6_hdr(skb)->daddr,
                                                         skb->len,
@@ -421,7 +449,7 @@ static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
                msg->msg_flags |= MSG_TRUNC;
        }
 
-       if (skb->ip_summed==CHECKSUM_UNNECESSARY) {
+       if (skb_csum_unnecessary(skb)) {
                err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
        } else if (msg->msg_flags&MSG_TRUNC) {
                if (__skb_checksum_complete(skb))
@@ -611,9 +639,7 @@ static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
        struct iovec *iov;
        u8 __user *type = NULL;
        u8 __user *code = NULL;
-#ifdef CONFIG_IPV6_MIP6
        u8 len = 0;
-#endif
        int probed = 0;
        int i;
 
@@ -646,7 +672,6 @@ static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
                                probed = 1;
                        }
                        break;
-#ifdef CONFIG_IPV6_MIP6
                case IPPROTO_MH:
                        if (iov->iov_base && iov->iov_len < 1)
                                break;
@@ -660,7 +685,6 @@ static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg)
                                len += iov->iov_len;
 
                        break;
-#endif
                default:
                        probed = 1;
                        break;
@@ -818,8 +842,12 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
        if (final_p)
                ipv6_addr_copy(&fl.fl6_dst, final_p);
 
-       if ((err = xfrm_lookup(&dst, &fl, sk, 1)) < 0)
-               goto out;
+       if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) {
+               if (err == -EREMOTE)
+                       err = ip6_dst_blackhole(sk, &dst, &fl);
+               if (err < 0)
+                       goto out;
+       }
 
        if (hlimit < 0) {
                if (ipv6_addr_is_multicast(&fl.fl6_dst))
@@ -882,7 +910,7 @@ static int rawv6_seticmpfilter(struct sock *sk, int level, int optname,
                return 0;
        default:
                return -ENOPROTOOPT;
-       };
+       }
 
        return 0;
 }
@@ -907,7 +935,7 @@ static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
                return 0;
        default:
                return -ENOPROTOOPT;
-       };
+       }
 
        return 0;
 }
@@ -961,7 +989,8 @@ static int rawv6_setsockopt(struct sock *sk, int level, int optname,
                default:
                        return ipv6_setsockopt(sk, level, optname, optval,
                                               optlen);
-       };
+       }
+
        return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
 }
 
@@ -982,7 +1011,7 @@ static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
        default:
                return compat_ipv6_setsockopt(sk, level, optname,
                                              optval, optlen);
-       };
+       }
        return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
 }
 #endif
@@ -1035,7 +1064,8 @@ static int rawv6_getsockopt(struct sock *sk, int level, int optname,
                default:
                        return ipv6_getsockopt(sk, level, optname, optval,
                                               optlen);
-       };
+       }
+
        return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
 }
 
@@ -1056,7 +1086,7 @@ static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
        default:
                return compat_ipv6_getsockopt(sk, level, optname,
                                              optval, optlen);
-       };
+       }
        return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
 }
 #endif
@@ -1250,7 +1280,7 @@ static int raw6_seq_show(struct seq_file *seq, void *v)
        return 0;
 }
 
-static struct seq_operations raw6_seq_ops = {
+static const struct seq_operations raw6_seq_ops = {
        .start =        raw6_seq_start,
        .next =         raw6_seq_next,
        .stop =         raw6_seq_stop,