From: Yousuk Seung Date: Fri, 16 Mar 2018 17:51:07 +0000 (-0700) Subject: tcp: add snd_ssthresh stat in SCM_TIMESTAMPING_OPT_STATS X-Git-Tag: v4.17-rc1~148^2~175 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=7156d194a0772f733865267e7207e0b08f81b02b;p=uclinux-h8%2Flinux.git tcp: add snd_ssthresh stat in SCM_TIMESTAMPING_OPT_STATS This patch adds TCP_NLA_SND_SSTHRESH stat into SCM_TIMESTAMPING_OPT_STATS that reports tcp_sock.snd_ssthresh. Signed-off-by: Yousuk Seung Signed-off-by: Neal Cardwell Signed-off-by: Priyaranjan Jha Signed-off-by: Soheil Hassas Yeganeh Signed-off-by: Yuchung Cheng Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller --- diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index 4c0ae0faf7ca..560374c978f9 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -243,6 +243,7 @@ enum { 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 */ + TCP_NLA_SND_SSTHRESH, /* Slow start size threshold */ }; diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index fb350f740f69..e553f84bde83 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -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)) + - 4 * nla_total_size(sizeof(u32)) + + 5 * nla_total_size(sizeof(u32)) + 3 * nla_total_size(sizeof(u8)), GFP_ATOMIC); if (!stats) return NULL; @@ -3061,6 +3061,7 @@ 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_SND_SSTHRESH, tp->snd_ssthresh); 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);