From patchwork Fri Nov 16 00:44:12 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yousuk Seung X-Patchwork-Id: 998642 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.b="RRXMnfFs"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 42wzyG2WGtz9s3q for ; Fri, 16 Nov 2018 11:44:22 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389171AbeKPKyc (ORCPT ); Fri, 16 Nov 2018 05:54:32 -0500 Received: from mail-yb1-f201.google.com ([209.85.219.201]:39904 "EHLO mail-yb1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727281AbeKPKyb (ORCPT ); Fri, 16 Nov 2018 05:54:31 -0500 Received: by mail-yb1-f201.google.com with SMTP id d196-v6so16129731ybh.6 for ; Thu, 15 Nov 2018 16:44:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=5CuXvpsS6vsuajrmUeluy+NjMbOaITR4x8DWme7kisI=; b=RRXMnfFsm92eUTq/kICMckF81bgzE7MuTPv5KceBFLpiRt8dUOwF49bOSuISvOa6xA CeUhmrmDj9iE7qMMZO/THrqPTy6B7ny/k1TOC9844U5jMWIvhbtCI+2bXwS3Ocqu5Day ozj2tU4Fo40l3xlhrjyK23qjqEw75nibQusrhkiMsOY4YwWpuF82YRAwqpWmsDJZy8Ug 52Ox3UmxKLCdYdCRruceOoKLRekiBHuFChZbPn8TFybFT7M2Dc6viNGqoCWSvTp/MFpp fRIwYjkmhUPjbWhFHEDx+89NcWQy65HtsfHxJiaftMqwPo2S/RH00sVdwy0Gjiy0rM2c Bj8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=5CuXvpsS6vsuajrmUeluy+NjMbOaITR4x8DWme7kisI=; b=VSV6OlKv2qZhOmeXjP7m/wF2OiKJDa4jzC8QJz95TwL6dEk2p5anWFELis6MSGcSXx bYmk+a9hw0cVwS0GFhVQ0mA/almgNC/6Kse17gi6T96q3B/HyUi+vkjnFdZAYzKUMihQ +mWsKGcM96UUB6jnYGpbQ67OvQWKGko3iMSP0wvBgnN3RZSEeUZOGCBn9LCd5Q2NYaOl Z5F4lTwBDg9zoYpej8zTC7DueOkI0Zy03RT8n7pCf0iboiOASKlHOjdw6w7Yamhp9u59 1B6VnDqN6rP7hwcOjmUKO/d5enKiNPSlb0T8RZjnfBAcC/2my6u4NUZFyLofAb9wUG2S VJDg== X-Gm-Message-State: AGRZ1gK8FHhJIHrmMovl50dkrvNo9D78799ZUBr1iQ8M3bmtmExz/puF LDuu9+NsKYeQi4TwmbwHP9mx0zf/vKNT X-Google-Smtp-Source: AJdET5dzBPnP+3ulvweQfKAGTszSgCKHv7HXlxqMVoveNc9sEYfJXAN7mZyUUCKPeNAZhC+ZP8ryrZclL6wC X-Received: by 2002:a25:f503:: with SMTP id a3-v6mr1309906ybe.18.1542329059088; Thu, 15 Nov 2018 16:44:19 -0800 (PST) Date: Thu, 15 Nov 2018 16:44:12 -0800 Message-Id: <20181116004412.63238-1-ysseung@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.19.1.1215.g8438c0b245-goog Subject: [PATCH net-next] tcp: add SRTT to SCM_TIMESTAMPING_OPT_STATS From: Yousuk Seung To: David Miller Cc: netdev@vger.kernel.org, Yousuk Seung , Eric Dumazet , Soheil Hassas Yeganeh , Neal Cardwell , Yuchung Cheng Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add TCP_NLA_SRTT to SCM_TIMESTAMPING_OPT_STATS that reports the smoothed round trip time in microseconds (tcp_sock.srtt_us >> 3). Signed-off-by: Yousuk Seung Signed-off-by: Eric Dumazet Acked-by: Soheil Hassas Yeganeh Acked-by: Neal Cardwell Acked-by: Yuchung Cheng --- include/uapi/linux/tcp.h | 1 + net/ipv4/tcp.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index e02d31986ff91..8bb6cc5f32356 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -266,6 +266,7 @@ enum { TCP_NLA_BYTES_RETRANS, /* Data bytes retransmitted */ TCP_NLA_DSACK_DUPS, /* DSACK blocks received */ TCP_NLA_REORD_SEEN, /* reordering events seen */ + TCP_NLA_SRTT, /* smoothed RTT in usecs */ }; /* for TCP_MD5SIG socket option */ diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 9e6bc4d6daa75..0363a0ebee57d 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -3246,6 +3246,7 @@ static size_t tcp_opt_stats_get_size(void) nla_total_size_64bit(sizeof(u64)) + /* TCP_NLA_BYTES_RETRANS */ nla_total_size(sizeof(u32)) + /* TCP_NLA_DSACK_DUPS */ nla_total_size(sizeof(u32)) + /* TCP_NLA_REORD_SEEN */ + nla_total_size(sizeof(u32)) + /* TCP_NLA_SRTT */ 0; } @@ -3299,6 +3300,7 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk) TCP_NLA_PAD); nla_put_u32(stats, TCP_NLA_DSACK_DUPS, tp->dsack_dups); nla_put_u32(stats, TCP_NLA_REORD_SEEN, tp->reord_seen); + nla_put_u32(stats, TCP_NLA_SRTT, tp->srtt_us >> 3); return stats; }