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Commit 87ecc95d authored by Priyaranjan Jha's avatar Priyaranjan Jha Committed by David S. Miller
Browse files

tcp: add send queue size stat in SCM_TIMESTAMPING_OPT_STATS 



This patch adds TCP_NLA_SENDQ_SIZE stat into SCM_TIMESTAMPING_OPT_STATS.
It reports no. of bytes present in send queue, when timestamp is
generated.

Signed-off-by: default avatarPriyaranjan Jha <priyarjha@google.com>
Signed-off-by: default avatarNeal Cardwell <ncardwell@google.com>
Signed-off-by: default avatarYuchung Cheng <ycheng@google.com>
Signed-off-by: default avatarSoheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 200066a5

include/uapi/linux/tcp.h

+1 −0
Original line number Diff line number Diff line
@@ -241,6 +241,7 @@ enum { 
	TCP_NLA_MIN_RTT,        /* minimum RTT */

	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 */



};

net/ipv4/tcp.c

+3 −1
Original line number Diff line number Diff line
@@ -3031,7 +3031,7 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk) 
	u32 rate;



	stats = alloc_skb(7 * nla_total_size_64bit(sizeof(u64)) +

			  3 * nla_total_size(sizeof(u32)) +

			  4 * nla_total_size(sizeof(u32)) +

			  2 * nla_total_size(sizeof(u8)), GFP_ATOMIC);

	if (!stats)

		return NULL;
@@ -3061,6 +3061,8 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk) 


	nla_put_u8(stats, TCP_NLA_RECUR_RETRANS, inet_csk(sk)->icsk_retransmits);

	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);

	return stats;

}