[NET]: {get|set}sockopt compatibility layer

This patch extends {get|set}sockopt compatibility layer in order to
move protocol specific parts to their place and avoid huge universal
net/compat.c file in the future.

Signed-off-by: Dmitry Mishin <dim@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 87 insertions, 25 deletions

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index ae20a0ec9bd8..8de5a8e59149 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -859,29 +859,12 @@ static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 }
 
 
-static int rawv6_setsockopt(struct sock *sk, int level, int optname, 
+static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
                             char __user *optval, int optlen)
 {
         struct raw6_sock *rp = raw6_sk(sk);
         int val;
 
-        switch(level) {
-                case SOL_RAW:
-                        break;
-
-                case SOL_ICMPV6:
-                        if (inet_sk(sk)->num != IPPROTO_ICMPV6)
-                                return -EOPNOTSUPP;
-                        return rawv6_seticmpfilter(sk, level, optname, optval,
-                                                   optlen);
-                case SOL_IPV6:
-                        if (optname == IPV6_CHECKSUM)
-                                break;
-                default:
-                        return ipv6_setsockopt(sk, level, optname, optval,
-                                               optlen);
-        };
-
         if (get_user(val, (int __user *)optval))
                 return -EFAULT;
 
@@ -906,12 +889,9 @@ static int rawv6_setsockopt(struct sock *sk, int level, int optname,
         }
 }
 
-static int rawv6_getsockopt(struct sock *sk, int level, int optname, 
-                            char __user *optval, int __user *optlen)
+static int rawv6_setsockopt(struct sock *sk, int level, int optname,
+                          char __user *optval, int optlen)
 {
-        struct raw6_sock *rp = raw6_sk(sk);
-        int val, len;
-
         switch(level) {
                 case SOL_RAW:
                         break;
@@ -919,15 +899,47 @@ static int rawv6_getsockopt(struct sock *sk, int level, int optname,
                 case SOL_ICMPV6:
                         if (inet_sk(sk)->num != IPPROTO_ICMPV6)
                                 return -EOPNOTSUPP;
-                        return rawv6_geticmpfilter(sk, level, optname, optval,
+                        return rawv6_seticmpfilter(sk, level, optname, optval,
                                                    optlen);
                 case SOL_IPV6:
                         if (optname == IPV6_CHECKSUM)
                                 break;
                 default:
-                        return ipv6_getsockopt(sk, level, optname, optval,
+                        return ipv6_setsockopt(sk, level, optname, optval,
                                                optlen);
         };
+        return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
+}
+
+#ifdef CONFIG_COMPAT
+static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
+                          char __user *optval, int optlen)
+{
+        switch(level) {
+                case SOL_RAW:
+                        break;
+
+                case SOL_ICMPV6:
+                        if (inet_sk(sk)->num != IPPROTO_ICMPV6)
+                                return -EOPNOTSUPP;
+                        return rawv6_seticmpfilter(sk, level, optname, optval,
+                                                   optlen);
+                case SOL_IPV6:
+                        if (optname == IPV6_CHECKSUM)
+                                break;
+                default:
+                        return compat_ipv6_setsockopt(sk, level,
+                                        optname, optval, optlen);
+        };
+        return do_rawv6_setsockopt(sk, level, optname, optval, optlen);
+}
+#endif
+
+static int do_rawv6_getsockopt(struct sock *sk, int level, int optname,
+                            char __user *optval, int __user *optlen)
+{
+        struct raw6_sock *rp = raw6_sk(sk);
+        int val, len;
 
         if (get_user(len,optlen))
                 return -EFAULT;
@@ -953,6 +965,52 @@ static int rawv6_getsockopt(struct sock *sk, int level, int optname,
         return 0;
 }
 
+static int rawv6_getsockopt(struct sock *sk, int level, int optname,
+                          char __user *optval, int __user *optlen)
+{
+        switch(level) {
+                case SOL_RAW:
+                        break;
+
+                case SOL_ICMPV6:
+                        if (inet_sk(sk)->num != IPPROTO_ICMPV6)
+                                return -EOPNOTSUPP;
+                        return rawv6_geticmpfilter(sk, level, optname, optval,
+                                                   optlen);
+                case SOL_IPV6:
+                        if (optname == IPV6_CHECKSUM)
+                                break;
+                default:
+                        return ipv6_getsockopt(sk, level, optname, optval,
+                                               optlen);
+        };
+        return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
+}
+
+#ifdef CONFIG_COMPAT
+static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname,
+                          char __user *optval, int __user *optlen)
+{
+        switch(level) {
+                case SOL_RAW:
+                        break;
+
+                case SOL_ICMPV6:
+                        if (inet_sk(sk)->num != IPPROTO_ICMPV6)
+                                return -EOPNOTSUPP;
+                        return rawv6_geticmpfilter(sk, level, optname, optval,
+                                                   optlen);
+                case SOL_IPV6:
+                        if (optname == IPV6_CHECKSUM)
+                                break;
+                default:
+                        return compat_ipv6_getsockopt(sk, level,
+                                        optname, optval, optlen);
+        };
+        return do_rawv6_getsockopt(sk, level, optname, optval, optlen);
+}
+#endif
+
 static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg)
 {
         switch(cmd) {
@@ -1008,6 +1066,10 @@ struct proto rawv6_prot = {
         .destroy =      inet6_destroy_sock,
         .setsockopt =   rawv6_setsockopt,
         .getsockopt =   rawv6_getsockopt,
+#ifdef CONFIG_COMPAT
+        .compat_setsockopt =    compat_rawv6_setsockopt,
+        .compat_getsockopt =    compat_rawv6_getsockopt,
+#endif
         .sendmsg =      rawv6_sendmsg,
         .recvmsg =      rawv6_recvmsg,
         .bind =         rawv6_bind,