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authorYousuk Seung <ysseung@google.com>2020-03-09 23:16:40 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-10 03:56:33 +0300
commite08ab0b377a1489760533424437c5f4be7f484a4 (patch)
tree1094b050222d950e2d2dc8898460010ea6a424aa /net
parent34a568a244bef287de2ff9a30c2ed369fb64dbfd (diff)
downloadlinux-e08ab0b377a1489760533424437c5f4be7f484a4.tar.xz
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: Yousuk Seung <ysseung@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/tcp.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 48aa457a9516..b7134f76f840 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -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;
}