[NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution

[net-next-2.6.git] / net / compat.c

diff --git a/net/compat.c b/net/compat.c
index 17c2710b2b9386760d2adf3749511aa131e541f0..2fc6d9bb622bb962d4c4ae7b5247dd240b21e3c6 100644 (file)
--- a/net/compat.c
+++ b/net/compat.c
@@ -564,6 +564,30 @@ int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
 }
 EXPORT_SYMBOL(compat_sock_get_timestamp);
 
+int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
+{
+       struct compat_timespec __user *ctv =
+                       (struct compat_timespec __user*) userstamp;
+       int err = -ENOENT;
+       struct timespec ts;
+
+       if (!sock_flag(sk, SOCK_TIMESTAMP))
+               sock_enable_timestamp(sk);
+       ts = ktime_to_timespec(sk->sk_stamp);
+       if (ts.tv_sec == -1)
+               return err;
+       if (ts.tv_sec == 0) {
+               sk->sk_stamp = ktime_get_real();
+               ts = ktime_to_timespec(sk->sk_stamp);
+       }
+       err = 0;
+       if (put_user(ts.tv_sec, &ctv->tv_sec) ||
+                       put_user(ts.tv_nsec, &ctv->tv_nsec))
+               err = -EFAULT;
+       return err;
+}
+EXPORT_SYMBOL(compat_sock_get_timestampns);
+
 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
                                char __user *optval, int __user *optlen)
 {