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Commit be631892 authored Mar 04, 2018 by Priyaranjan Jha Committed by David S. Miller Mar 05, 2018

tcp: add ca_state stat in SCM_TIMESTAMPING_OPT_STATS



This patch adds TCP_NLA_CA_STATE stat into SCM_TIMESTAMPING_OPT_STATS.
It reports ca_state of socket, when timestamp is generated.

Signed-off-by: Priyaranjan Jha <priyarjha@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 87ecc95d

include/uapi/linux/tcp.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -242,6 +242,7 @@ enum {
		TCP_NLA_RECUR_RETRANS, /* Recurring retransmits for the current pkt */
		TCP_NLA_DELIVERY_RATE_APP_LMT, /* delivery rate application limited ? */
		TCP_NLA_SNDQ_SIZE, /* Data (bytes) pending in send queue */
		TCP_NLA_CA_STATE, /* ca_state of socket */

		};

net/ipv4/tcp.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -3032,7 +3032,7 @@ struct sk_buff tcp_get_timestamping_opt_stats(const struct sock sk)

		stats = alloc_skb(7 * nla_total_size_64bit(sizeof(u64)) +
		4 * nla_total_size(sizeof(u32)) +
		2 * nla_total_size(sizeof(u8)), GFP_ATOMIC);
		3 * nla_total_size(sizeof(u8)), GFP_ATOMIC);
		if (!stats)
		return NULL;

		@@ -3063,6 +3063,7 @@ struct sk_buff tcp_get_timestamping_opt_stats(const struct sock sk)
		nla_put_u8(stats, TCP_NLA_DELIVERY_RATE_APP_LMT, !!tp->rate_app_limited);

		nla_put_u32(stats, TCP_NLA_SNDQ_SIZE, tp->write_seq - tp->snd_una);
		nla_put_u8(stats, TCP_NLA_CA_STATE, inet_csk(sk)->icsk_ca_state);
		return stats;
		}