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Commit 6aedbf98 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

tcp: use tcp_md5_needed for timewait sockets 



This might speedup tcp_twsk_destructor() a bit,
avoiding a cache line miss.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 921f9a0f

net/ipv4/tcp_minisocks.c

+13 −8
Original line number Diff line number Diff line
@@ -294,13 +294,16 @@ void tcp_time_wait(struct sock *sk, int state, int timeo) 
		 * so the timewait ack generating code has the key.

		 */

		do {

			struct tcp_md5sig_key *key;

			tcptw->tw_md5_key = NULL;

			if (static_branch_unlikely(&tcp_md5_needed)) {

				struct tcp_md5sig_key *key;



				key = tp->af_specific->md5_lookup(sk, sk);

				if (key) {

					tcptw->tw_md5_key = kmemdup(key, sizeof(*key), GFP_ATOMIC);

					BUG_ON(tcptw->tw_md5_key && !tcp_alloc_md5sig_pool());

				}

			}

		} while (0);

#endif
@@ -338,10 +341,12 @@ EXPORT_SYMBOL(tcp_time_wait); 
void tcp_twsk_destructor(struct sock *sk)

{

#ifdef CONFIG_TCP_MD5SIG

	if (static_branch_unlikely(&tcp_md5_needed)) {

		struct tcp_timewait_sock *twsk = tcp_twsk(sk);



		if (twsk->tw_md5_key)

			kfree_rcu(twsk->tw_md5_key, rcu);

	}

#endif

}

EXPORT_SYMBOL_GPL(tcp_twsk_destructor);