Message ID | 20250318002710.29483-13-chia-yu.chang@nokia-bell-labs.com (mailing list archive) |
---|---|
State | New |
Delegated to: | Netdev Maintainers |
Headers | show
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Tue, 18 Mar 2025 00:28:01 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 131.228.6.100) smtp.mailfrom=nokia-bell-labs.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nokia-bell-labs.com; Received-SPF: Pass (protection.outlook.com: domain of nokia-bell-labs.com designates 131.228.6.100 as permitted sender) receiver=protection.outlook.com; client-ip=131.228.6.100; helo=fr711usmtp2.zeu.alcatel-lucent.com; pr=C Received: from fr711usmtp2.zeu.alcatel-lucent.com (131.228.6.100) by AMS0EPF00000196.mail.protection.outlook.com (10.167.16.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8534.20 via Frontend Transport; Tue, 18 Mar 2025 00:28:01 +0000 Received: from sarah.nbl.nsn-rdnet.net (sarah.nbl.nsn-rdnet.net [10.0.73.150]) by fr711usmtp2.zeu.alcatel-lucent.com (GMO) with ESMTP id 52I0RNBs024935; Tue, 18 Mar 2025 00:28:08 GMT From: chia-yu.chang@nokia-bell-labs.com To: netdev@vger.kernel.org, dave.taht@gmail.com, pabeni@redhat.com, jhs@mojatatu.com, kuba@kernel.org, stephen@networkplumber.org, xiyou.wangcong@gmail.com, jiri@resnulli.us, davem@davemloft.net, edumazet@google.com, horms@kernel.org, andrew+netdev@lunn.ch, donald.hunter@gmail.com, ast@fiberby.net, liuhangbin@gmail.com, shuah@kernel.org, linux-kselftest@vger.kernel.org, ij@kernel.org, ncardwell@google.com, koen.de_schepper@nokia-bell-labs.com, g.white@cablelabs.com, ingemar.s.johansson@ericsson.com, mirja.kuehlewind@ericsson.com, cheshire@apple.com, rs.ietf@gmx.at, Jason_Livingood@comcast.com, vidhi_goel@apple.com Cc: Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com> Subject: [PATCH v2 net-next 12/15] tcp: accecn: AccECN ACE field multi-wrap heuristic Date: Tue, 18 Mar 2025 01:27:07 +0100 Message-Id: <20250318002710.29483-13-chia-yu.chang@nokia-bell-labs.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250318002710.29483-1-chia-yu.chang@nokia-bell-labs.com> References: <20250318002710.29483-1-chia-yu.chang@nokia-bell-labs.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: <netdev.vger.kernel.org> List-Subscribe: <mailto:netdev+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:netdev+unsubscribe@vger.kernel.org> MIME-Version: 1.0 Content-Type: text/plain; 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Series |
AccECN protocol patch series
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expand
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diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index f62bbf6f4eb3..5c71135b43f7 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -734,6 +734,24 @@ static u32 __tcp_accecn_process(struct sock *sk, const struct sk_buff *skb, d_ceb = tp->delivered_ecn_bytes[INET_ECN_CE - 1] - old_ceb; if (!d_ceb) return delta; + + if ((delivered_pkts >= (TCP_ACCECN_CEP_ACE_MASK + 1) * 2) && + (tcp_is_sack(tp) || + ((1 << inet_csk(sk)->icsk_ca_state) & + (TCPF_CA_Open | TCPF_CA_CWR)))) { + u32 est_d_cep; + + if (delivered_bytes <= d_ceb) + return safe_delta; + + est_d_cep = DIV_ROUND_UP_ULL((u64)d_ceb * + delivered_pkts, + delivered_bytes); + return min(safe_delta, + delta + + (est_d_cep & ~TCP_ACCECN_CEP_ACE_MASK)); + } + if (d_ceb > delta * tp->mss_cache) return safe_delta; if (d_ceb <