forked from luck/tmp_suning_uos_patched
tcp: use tcp_md5_needed for timewait sockets
This might speedup tcp_twsk_destructor() a bit, avoiding a cache line miss. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -294,13 +294,16 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
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* so the timewait ack generating code has the key.
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*/
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do {
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struct tcp_md5sig_key *key;
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tcptw->tw_md5_key = NULL;
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if (static_branch_unlikely(&tcp_md5_needed)) {
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struct tcp_md5sig_key *key;
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key = tp->af_specific->md5_lookup(sk, sk);
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if (key) {
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tcptw->tw_md5_key = kmemdup(key, sizeof(*key), GFP_ATOMIC);
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BUG_ON(tcptw->tw_md5_key && !tcp_alloc_md5sig_pool());
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}
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}
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} while (0);
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#endif
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@ -338,10 +341,12 @@ EXPORT_SYMBOL(tcp_time_wait);
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void tcp_twsk_destructor(struct sock *sk)
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{
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#ifdef CONFIG_TCP_MD5SIG
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if (static_branch_unlikely(&tcp_md5_needed)) {
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struct tcp_timewait_sock *twsk = tcp_twsk(sk);
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if (twsk->tw_md5_key)
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kfree_rcu(twsk->tw_md5_key, rcu);
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}
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#endif
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}
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EXPORT_SYMBOL_GPL(tcp_twsk_destructor);
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