[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, 43 insertions, 8 deletions

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 00840474a449..0b0721bd45c6 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1207,16 +1207,13 @@ static int udp_destroy_sock(struct sock *sk)
 /*
  *      Socket option code for UDP
  */
-static int udp_setsockopt(struct sock *sk, int level, int optname, 
+static int do_udp_setsockopt(struct sock *sk, int level, int optname,
                           char __user *optval, int optlen)
 {
         struct udp_sock *up = udp_sk(sk);
         int val;
         int err = 0;
 
-        if (level != SOL_UDP)
-                return ip_setsockopt(sk, level, optname, optval, optlen);
-
         if(optlen<sizeof(int))
                 return -EINVAL;
 
@@ -1256,15 +1253,31 @@ static int udp_setsockopt(struct sock *sk, int level, int optname,
         return err;
 }
 
-static int udp_getsockopt(struct sock *sk, int level, int optname, 
+static int udp_setsockopt(struct sock *sk, int level, int optname,
+                          char __user *optval, int optlen)
+{
+        if (level != SOL_UDP)
+                return ip_setsockopt(sk, level, optname, optval, optlen);
+        return do_udp_setsockopt(sk, level, optname, optval, optlen);
+}
+
+#ifdef CONFIG_COMPAT
+static int compat_udp_setsockopt(struct sock *sk, int level, int optname,
+                char __user *optval, int optlen)
+{
+        if (level != SOL_UDP)
+                return compat_ip_setsockopt(sk, level,
+                                optname, optval, optlen);
+        return do_udp_setsockopt(sk, level, optname, optval, optlen);
+}
+#endif
+
+static int do_udp_getsockopt(struct sock *sk, int level, int optname,
                           char __user *optval, int __user *optlen)
 {
         struct udp_sock *up = udp_sk(sk);
         int val, len;
 
-        if (level != SOL_UDP)
-                return ip_getsockopt(sk, level, optname, optval, optlen);
-
         if(get_user(len,optlen))
                 return -EFAULT;
 
@@ -1293,6 +1306,24 @@ static int udp_getsockopt(struct sock *sk, int level, int optname,
         return 0;
 }
 
+static int udp_getsockopt(struct sock *sk, int level, int optname,
+                          char __user *optval, int __user *optlen)
+{
+        if (level != SOL_UDP)
+                return ip_getsockopt(sk, level, optname, optval, optlen);
+        return do_udp_getsockopt(sk, level, optname, optval, optlen);
+}
+
+#ifdef CONFIG_COMPAT
+static int compat_udp_getsockopt(struct sock *sk, int level, int optname,
+                          char __user *optval, int __user *optlen)
+{
+        if (level != SOL_UDP)
+                return compat_ip_getsockopt(sk, level,
+                                optname, optval, optlen);
+        return do_udp_getsockopt(sk, level, optname, optval, optlen);
+}
+#endif
 /**
  *      udp_poll - wait for a UDP event.
  *      @file - file struct
@@ -1350,6 +1381,10 @@ struct proto udp_prot = {
         .destroy =      udp_destroy_sock,
         .setsockopt =   udp_setsockopt,
         .getsockopt =   udp_getsockopt,
+#ifdef CONFIG_COMPAT
+        .compat_setsockopt =    compat_udp_setsockopt,
+        .compat_getsockopt =    compat_udp_getsockopt,
+#endif
         .sendmsg =      udp_sendmsg,
         .recvmsg =      udp_recvmsg,
         .sendpage =     udp_sendpage,