ipv4,ipv6 mroute: Add some helper inline functions to remove ugly ifdefs.

ip{,v6}_mroute_{set,get}sockopt() should not matter by optimization but
it would be better not to depend on optimization semantically.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

3 files changed, 59 insertions, 8 deletions

diff --git a/include/linux/mroute.h b/include/linux/mroute.h
index df8efd42bf8a..07112ee9293a 100644
--- a/include/linux/mroute.h
+++ b/include/linux/mroute.h
@@ -144,10 +144,37 @@ static inline int ip_mroute_opt(int opt)
 }
 #endif
 
+#ifdef CONFIG_IP_MROUTE
 extern int ip_mroute_setsockopt(struct sock *, int, char __user *, int);
 extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
 extern int ip_mr_init(void);
+#else
+static inline
+int ip_mroute_setsockopt(struct sock *sock,
+                         int optname, char __user *optval, int optlen)
+{
+        return -ENOPROTOOPT;
+}
+
+static inline
+int ip_mroute_getsockopt(struct sock *sock,
+                         int optname, char __user *optval, int __user *optlen)
+{
+        return -ENOPROTOOPT;
+}
+
+static inline
+int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
+{
+        return -ENOIOCTLCMD;
+}
+
+static inline int ip_mr_init(void)
+{
+        return 0;
+}
+#endif
 
 struct vif_device
 {
diff --git a/include/linux/mroute6.h b/include/linux/mroute6.h
index 4c4d6f57d5c5..5cf50473a10f 100644
--- a/include/linux/mroute6.h
+++ b/include/linux/mroute6.h
@@ -131,12 +131,44 @@ static inline int ip6_mroute_opt(int opt)
 
 struct sock;
 
+#ifdef CONFIG_IPV6_MROUTE
 extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, int);
 extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
 extern int ip6_mr_input(struct sk_buff *skb);
 extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
 extern int ip6_mr_init(void);
 extern void ip6_mr_cleanup(void);
+#else
+static inline
+int ip6_mroute_setsockopt(struct sock *sock,
+                          int optname, char __user *optval, int optlen)
+{
+        return -ENOPROTOOPT;
+}
+
+static inline
+int ip6_mroute_getsockopt(struct sock *sock,
+                          int optname, char __user *optval, int __user *optlen)
+{
+        return -ENOPROTOOPT;
+}
+
+static inline
+int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
+{
+        return -ENOIOCTLCMD;
+}
+
+static inline int ip6_mr_init(void)
+{
+        return 0;
+}
+
+static inline void ip6_mr_cleanup(void)
+{
+        return;
+}
+#endif
 
 struct mif_device
 {
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 6b39af1acb5e..3d828bc4b1cf 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -59,9 +59,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
-#ifdef CONFIG_IPV6_MROUTE
 #include <linux/mroute6.h>
-#endif
 
 MODULE_AUTHOR("Cast of dozens");
 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
@@ -952,11 +950,9 @@ static int __init inet6_init(void)
         err = icmpv6_init();
         if (err)
                 goto icmp_fail;
-#ifdef CONFIG_IPV6_MROUTE
         err = ip6_mr_init();
         if (err)
                 goto ipmr_fail;
-#endif
         err = ndisc_init();
         if (err)
                 goto ndisc_fail;
@@ -1059,10 +1055,8 @@ netfilter_fail:
 igmp_fail:
         ndisc_cleanup();
 ndisc_fail:
-#ifdef CONFIG_IPV6_MROUTE
         ip6_mr_cleanup();
 ipmr_fail:
-#endif
         icmpv6_cleanup();
 icmp_fail:
         unregister_pernet_subsys(&inet6_net_ops);
@@ -1117,9 +1111,7 @@ static void __exit inet6_exit(void)
         ipv6_netfilter_fini();
         igmp6_cleanup();
         ndisc_cleanup();
-#ifdef CONFIG_IPV6_MROUTE
         ip6_mr_cleanup();
-#endif
         icmpv6_cleanup();
         rawv6_exit();