spin_lock(&tcp_cong_list_lock);
ca = tcp_ca_find(name);
-#ifdef CONFIG_KMOD
+#ifdef CONFIG_MODULES
if (!ca && capable(CAP_SYS_MODULE)) {
spin_unlock(&tcp_cong_list_lock);
if (ca == icsk->icsk_ca_ops)
goto out;
-#ifdef CONFIG_KMOD
+#ifdef CONFIG_MODULES
/* not found attempt to autoload module */
if (!ca && capable(CAP_SYS_MODULE)) {
rcu_read_unlock();
return err;
}
+/* RFC2861 Check whether we are limited by application or congestion window
+ * This is the inverse of cwnd check in tcp_tso_should_defer
+ */
+int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight)
+{
+ const struct tcp_sock *tp = tcp_sk(sk);
+ u32 left;
+
+ if (in_flight >= tp->snd_cwnd)
+ return 1;
+
+ left = tp->snd_cwnd - in_flight;
+ if (sk_can_gso(sk) &&
+ left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd &&
+ left * tp->mss_cache < sk->sk_gso_max_size)
+ return 1;
+ return left <= tcp_max_burst(tp);
+}
+EXPORT_SYMBOL_GPL(tcp_is_cwnd_limited);
/*
* Slow start is used when congestion window is less than slow start
/* This is Jacobson's slow start and congestion avoidance.
* SIGCOMM '88, p. 328.
*/
-void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 in_flight, int flag)
+void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 in_flight)
{
struct tcp_sock *tp = tcp_sk(sk);