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From: "Ilpo Järvinen" <ilpo.jarvinen@helsinki.fi>
To: netdev@vger.kernel.org
Cc: Yuchung Cheng <ycheng@google.com>,
	Neal Cardwell <ncardwell@google.com>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	Olivier Tilmans <olivier.tilmans@nokia-bell-labs.com>
Subject: [RFC PATCH 28/28] tcp: AccECN sysctl documentation
Date: Wed, 18 Mar 2020 11:43:32 +0200	[thread overview]
Message-ID: <1584524612-24470-29-git-send-email-ilpo.jarvinen@helsinki.fi> (raw)
In-Reply-To: <1584524612-24470-1-git-send-email-ilpo.jarvinen@helsinki.fi>

From: Ilpo Järvinen <ilpo.jarvinen@cs.helsinki.fi>

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@cs.helsinki.fi>
---
 Documentation/networking/ip-sysctl.txt | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 5f53faff4e25..ecca6e1d6bea 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -301,15 +301,21 @@ tcp_ecn - INTEGER
 		0 Disable ECN.  Neither initiate nor accept ECN.
 		1 Enable ECN when requested by incoming connections and
 		  also request ECN on outgoing connection attempts.
-		2 Enable ECN when requested by incoming connections
+		2 Enable ECN or AccECN when requested by incoming connections
 		  but do not request ECN on outgoing connections.
+		3 Enable AccECN when requested by incoming connections and
+		  also request AccECN on outgoing connection attempts.
+	    0x102 Enable AccECN in optionless mode for incoming connections.
+	    0x103 Enable AccECN in optionless mode for incoming and outgoing
+		  connections.
 	Default: 2
 
 tcp_ecn_fallback - BOOLEAN
 	If the kernel detects that ECN connection misbehaves, enable fall
 	back to non-ECN. Currently, this knob implements the fallback
-	from RFC3168, section 6.1.1.1., but we reserve that in future,
-	additional detection mechanisms could be implemented under this
+	from RFC3168, section 6.1.1.1., as well as the ECT codepoint mangling
+	detection during the Accurate ECN handshake, but we reserve that in
+	future, additional detection mechanisms could be implemented under this
 	knob. The value	is not used, if tcp_ecn or per route (or congestion
 	control) ECN settings are disabled.
 	Default: 1 (fallback enabled)
-- 
2.20.1


  parent reply	other threads:[~2020-03-18  9:44 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-18  9:43 [RFC PATCH 00/28]: Accurate ECN for TCP Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 01/28] tcp: add tp to prepare for AccECN code Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 02/28] tcp: fast path functions later Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 03/28] tcp: move tcp_in_ack_event later Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 04/28] tcp: create FLAG_TS_PROGRESS Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 05/28] tcp: extend TCP flags to allow AE bit/ACE field Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 06/28] tcp: reorganize SYN ECN code Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 07/28] tcp: rework {__,}tcp_ecn_check_ce() -> tcp_data_ecn_check() Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 08/28] tcp: helpers for ECN mode handling Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 09/28] gso: AccECN support Ilpo Järvinen
2020-03-19  3:44   ` Eric Dumazet
2020-03-19 22:36     ` Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 10/28] gro: prevent ACE field corruption & better AccECN handling Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 11/28] tcp: AccECN support to tcp_add_backlog Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 12/28] tcp: AccECN core Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 13/28] tcp: Pass flags to tcp_send_ack Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 14/28] tcp: AccECN negotiation Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 15/28] tcp: add AccECN rx byte counters Ilpo Järvinen
2020-03-19  3:36   ` Eric Dumazet
2020-03-18  9:43 ` [RFC PATCH 16/28] tcp: allow embedding leftover into option padding Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 17/28] tcp: AccECN needs to know delivered bytes Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 18/28] tcp: don't early return when sack doesn't fit Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 19/28] tcp: AccECN option Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 20/28] tcp: AccECN option send control Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 21/28] tcp: AccECN option beacon Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 22/28] tcp: AccECN option order bit & failure handling Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 23/28] tcp: AccECN option ceb/cep heuristic Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 24/28] tcp: try to fit AccECN option with SACK Ilpo Järvinen
2020-03-19  3:29   ` Eric Dumazet
2020-03-19 20:33     ` Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 25/28] tcp: try to avoid safer when ACKs are thinned Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 26/28] tcp: to prevent runaway AccECN cep/ACE deficit, limit GSO size Ilpo Järvinen
2020-03-18  9:43 ` [RFC PATCH 27/28] gro: flushing when CWR is set negatively affects AccECN Ilpo Järvinen
2020-03-18  9:43 ` Ilpo Järvinen [this message]
2020-03-19 23:02   ` [RFC PATCH 28/28] tcp: AccECN sysctl documentation Dave Taht
2020-03-20 22:40     ` Ilpo Järvinen
2020-03-20 23:22       ` Yuchung Cheng
2020-03-23 13:34         ` Ilpo Järvinen
2020-03-23 19:03           ` Yuchung Cheng
2020-03-24 12:50             ` Ilpo Järvinen
2020-03-24 17:05               ` Yuchung Cheng
2020-03-18 23:29 ` [RFC PATCH 00/28]: Accurate ECN for TCP David Miller
2020-03-19 20:25   ` Ilpo Järvinen
2020-03-20  4:38     ` David Miller
  -- strict thread matches above, loose matches on Subject: below --
2020-03-18  9:37 [RFC PATCH 02/28] tcp: fast path functions later Ilpo Järvinen
2020-03-18  9:38 ` [RFC PATCH 28/28] tcp: AccECN sysctl documentation Ilpo Järvinen

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