2 files changed, 22 insertions, 1 deletions

diff --git a/include/net/compat.h b/include/net/compat.h
index 290bab46d457..8662b8f43df5 100644
--- a/include/net/compat.h
+++ b/include/net/compat.h
@@ -23,6 +23,9 @@ struct compat_cmsghdr {
         compat_int_t    cmsg_type;
 };
 
+struct sock;
+extern int compat_sock_get_timestamp(struct sock *, struct timeval __user *);
+
 #else /* defined(CONFIG_COMPAT) */
 #define compat_msghdr   msghdr          /* to avoid compiler warnings */
 #endif /* defined(CONFIG_COMPAT) */
@@ -34,7 +37,6 @@ extern asmlinkage long compat_sys_recvmsg(int,struct compat_msghdr __user *,unsi
 extern asmlinkage long compat_sys_getsockopt(int, int, int, char __user *, int __user *);
 extern int put_cmsg_compat(struct msghdr*, int, int, int, void *);
 
-struct sock;
 extern int cmsghdr_from_user_compat_to_kern(struct msghdr *, struct sock *, unsigned char *, int);
 
 #endif /* NET_COMPAT_H */
diff --git a/net/compat.c b/net/compat.c
index 13177a1a4b39..8fd37cd7b501 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -543,6 +543,25 @@ static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
         return sock_getsockopt(sock, level, optname, optval, optlen);
 }
 
+int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
+{
+        struct compat_timeval __user *ctv =
+                        (struct compat_timeval __user*) userstamp;
+        int err = -ENOENT;
+
+        if (!sock_flag(sk, SOCK_TIMESTAMP))
+                sock_enable_timestamp(sk);
+        if (sk->sk_stamp.tv_sec == -1)
+                return err;
+        if (sk->sk_stamp.tv_sec == 0)
+                do_gettimeofday(&sk->sk_stamp);
+        if (put_user(sk->sk_stamp.tv_sec, &ctv->tv_sec) ||
+                        put_user(sk->sk_stamp.tv_usec, &ctv->tv_usec))
+                err = -EFAULT;
+        return err;
+}
+EXPORT_SYMBOL(compat_sock_get_timestamp);
+
 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
                                 char __user *optval, int __user *optlen)
 {