tcp: Update MIB counters for drops
This patch updates LINUX_MIB_LISTENDROPS in tcp_v4_conn_request() and tcp_v4_err(). tcp_v4_conn_request() in particular can drop SYNs for various reasons which are not currently tracked. Signed-off-by: Vijay Subramanian <subramanian.vijay@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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9665d5d624
Коммит
848bf15f36
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@ -496,6 +496,7 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
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* errors returned from accept().
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* errors returned from accept().
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*/
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*/
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inet_csk_reqsk_queue_drop(sk, req, prev);
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inet_csk_reqsk_queue_drop(sk, req, prev);
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NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
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goto out;
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goto out;
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case TCP_SYN_SENT:
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case TCP_SYN_SENT:
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@ -1502,7 +1503,6 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
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*/
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*/
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if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) {
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if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) {
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NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
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NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
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NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
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goto drop;
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goto drop;
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}
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}
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@ -1669,6 +1669,7 @@ drop_and_release:
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drop_and_free:
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drop_and_free:
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reqsk_free(req);
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reqsk_free(req);
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drop:
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drop:
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NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
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return 0;
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return 0;
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}
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}
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EXPORT_SYMBOL(tcp_v4_conn_request);
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EXPORT_SYMBOL(tcp_v4_conn_request);
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