netdev - [PATCHv2 net 3/3] Documentation: add description for net.sctp.ecn

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Message-Id: <5134901d42a9de34ebcc8726ef147688686537a8.1654787716.git.lucien.xin@gmail.com>
Date:   Thu,  9 Jun 2022 11:17:15 -0400
From:   Xin Long <lucien.xin@...il.com>
To:     network dev <netdev@...r.kernel.org>, linux-sctp@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Neil Horman <nhorman@...driver.com>
Subject: [PATCHv2 net 3/3] Documentation: add description for net.sctp.ecn_enable

Describe it in networking/ip-sysctl.rst like other SCTP options.

Fixes: 2f5268a9249b ("sctp: allow users to set netns ecn flag with sysctl")
Signed-off-by: Xin Long <lucien.xin@...il.com>
---
 Documentation/networking/ip-sysctl.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 5d90e219398c..f709e368808d 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -2955,6 +2955,18 @@ intl_enable - BOOLEAN
 
 	Default: 0
 
+ecn_enable - BOOLEAN
+        Control use of Explicit Congestion Notification (ECN) by SCTP.
+        Like in TCP, ECN is used only when both ends of the SCTP connection
+        indicate support for it. This feature is useful in avoiding losses
+        due to congestion by allowing supporting routers to signal congestion
+        before having to drop packets.
+
+        1: Enable ecn.
+        0: Disable ecn.
+
+        Default: 1
+
 
 ``/proc/sys/net/core/*``
 ========================
-- 
2.31.1