Commit e08ab0b3 authored by Yousuk Seung's avatar Yousuk Seung Committed by David S. Miller
Browse files

tcp: add bytes not sent to SCM_TIMESTAMPING_OPT_STATS 



Add TCP_NLA_BYTES_NOTSENT to SCM_TIMESTAMPING_OPT_STATS that reports
bytes in the write queue but not sent. This is the same metric as
what is exported with tcp_info.tcpi_notsent_bytes.

Signed-off-by: default avatarYousuk Seung <ysseung@google.com>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Acked-by: default avatarSoheil Hassas Yeganeh <soheil@google.com>
Acked-by: default avatarYuchung Cheng <ycheng@google.com>
Acked-by: default avatarNeal Cardwell <ncardwell@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 34a568a2

include/uapi/linux/tcp.h

+1 −0
Original line number Diff line number Diff line
@@ -312,6 +312,7 @@ enum { 
	TCP_NLA_REORD_SEEN,	/* reordering events seen */

	TCP_NLA_SRTT,		/* smoothed RTT in usecs */

	TCP_NLA_TIMEOUT_REHASH, /* Timeout-triggered rehash attempts */

	TCP_NLA_BYTES_NOTSENT,	/* Bytes in write queue not yet sent */

};



/* for TCP_MD5SIG socket option */

net/ipv4/tcp.c

+3 −0
Original line number Diff line number Diff line
@@ -3344,6 +3344,7 @@ static size_t tcp_opt_stats_get_size(void) 
		nla_total_size(sizeof(u32)) + /* TCP_NLA_REORD_SEEN */

		nla_total_size(sizeof(u32)) + /* TCP_NLA_SRTT */

		nla_total_size(sizeof(u16)) + /* TCP_NLA_TIMEOUT_REHASH */

		nla_total_size(sizeof(u32)) + /* TCP_NLA_BYTES_NOTSENT */

		0;

}
@@ -3399,6 +3400,8 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk) 
	nla_put_u32(stats, TCP_NLA_REORD_SEEN, tp->reord_seen);

	nla_put_u32(stats, TCP_NLA_SRTT, tp->srtt_us >> 3);

	nla_put_u16(stats, TCP_NLA_TIMEOUT_REHASH, tp->timeout_rehash);

	nla_put_u32(stats, TCP_NLA_BYTES_NOTSENT,

		    max_t(int, 0, tp->write_seq - tp->snd_nxt));



	return stats;

}

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