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

[mirror_ubuntu-eoan-kernel.git] / net / ipv4 / tcp.c

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 00aa80e9324323305fb72b365f75f96243390d1c..31b0123a96993f74bd555a19af37e91c6e69eddf 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1687,18 +1687,14 @@ int tcp_disconnect(struct sock *sk, int flags)
 /*
  *     Socket option code for TCP.
  */
-int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
-                  int optlen)
+static int do_tcp_setsockopt(struct sock *sk, int level,
+               int optname, char __user *optval, int optlen)
 {
        struct tcp_sock *tp = tcp_sk(sk);
        struct inet_connection_sock *icsk = inet_csk(sk);
        int val;
        int err = 0;
 
-       if (level != SOL_TCP)
-               return icsk->icsk_af_ops->setsockopt(sk, level, optname,
-                                                    optval, optlen);
-
        /* This is a string value all the others are int's */
        if (optname == TCP_CONGESTION) {
                char name[TCP_CA_NAME_MAX];
@@ -1871,6 +1867,35 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
        return err;
 }
 
+int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
+                  int optlen)
+{
+       struct inet_connection_sock *icsk = inet_csk(sk);
+
+       if (level != SOL_TCP)
+               return icsk->icsk_af_ops->setsockopt(sk, level, optname,
+                                                    optval, optlen);
+       return do_tcp_setsockopt(sk, level, optname, optval, optlen);
+}
+
+#ifdef CONFIG_COMPAT
+int compat_tcp_setsockopt(struct sock *sk, int level,
+               int optname, char __user *optval, int optlen)
+{
+       struct inet_connection_sock *icsk = inet_csk(sk);
+
+       if (level != SOL_TCP) {
+               if (icsk->icsk_af_ops->compat_setsockopt)
+                       return icsk->icsk_af_ops->compat_setsockopt(sk,
+                               level, optname, optval, optlen);
+               else
+                       return icsk->icsk_af_ops->setsockopt(sk,
+                               level, optname, optval, optlen);
+       }
+       return do_tcp_setsockopt(sk, level, optname, optval, optlen);
+}
+#endif
+
 /* Return information about state of tcp endpoint in API format. */
 void tcp_get_info(struct sock *sk, struct tcp_info *info)
 {
@@ -1931,17 +1956,13 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
 
 EXPORT_SYMBOL_GPL(tcp_get_info);
 
-int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
-                  int __user *optlen)
+static int do_tcp_getsockopt(struct sock *sk, int level,
+               int optname, char __user *optval, int __user *optlen)
 {
        struct inet_connection_sock *icsk = inet_csk(sk);
        struct tcp_sock *tp = tcp_sk(sk);
        int val, len;
 
-       if (level != SOL_TCP)
-               return icsk->icsk_af_ops->getsockopt(sk, level, optname,
-                                                    optval, optlen);
-
        if (get_user(len, optlen))
                return -EFAULT;
 
@@ -2025,6 +2046,34 @@ int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
        return 0;
 }
 
+int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
+                  int __user *optlen)
+{
+       struct inet_connection_sock *icsk = inet_csk(sk);
+
+       if (level != SOL_TCP)
+               return icsk->icsk_af_ops->getsockopt(sk, level, optname,
+                                                    optval, optlen);
+       return do_tcp_getsockopt(sk, level, optname, optval, optlen);
+}
+
+#ifdef CONFIG_COMPAT
+int compat_tcp_getsockopt(struct sock *sk, int level,
+               int optname, char __user *optval, int __user *optlen)
+{
+       struct inet_connection_sock *icsk = inet_csk(sk);
+
+       if (level != SOL_TCP) {
+               if (icsk->icsk_af_ops->compat_getsockopt)
+                       return icsk->icsk_af_ops->compat_getsockopt(sk,
+                               level, optname, optval, optlen);
+               else
+                       return icsk->icsk_af_ops->getsockopt(sk,
+                               level, optname, optval, optlen);
+       }
+       return do_tcp_getsockopt(sk, level, optname, optval, optlen);
+}
+#endif
 
 extern void __skb_cb_too_small_for_tcp(int, int);
 extern struct tcp_congestion_ops tcp_reno;
@@ -2142,3 +2191,7 @@ EXPORT_SYMBOL(tcp_sendpage);
 EXPORT_SYMBOL(tcp_setsockopt);
 EXPORT_SYMBOL(tcp_shutdown);
 EXPORT_SYMBOL(tcp_statistics);
+#ifdef CONFIG_COMPAT
+EXPORT_SYMBOL(compat_tcp_setsockopt);
+EXPORT_SYMBOL(compat_tcp_getsockopt);
+#endif