netdev - [PATCH net 2/3] Documentation: add description for net.sctp.intl

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Message-Id: <1fc59e854d7b9c66f4ab681dbe2a9eb91219f3a4.1654279751.git.lucien.xin@gmail.com>
Date:   Fri,  3 Jun 2022 14:09:24 -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: [PATCH net 2/3] Documentation: add description for net.sctp.intl_enable

Describe it in networking/ip-sysctl.rst like other SCTP options.
We need to document this especailly as when using the feature
of User Message Interleaving, some socket options also needs
to be set.

Fixes: 463118c34a35 ("sctp: support sysctl to allow users to use stream interleave")
Signed-off-by: Xin Long <lucien.xin@...il.com>
---
 Documentation/networking/ip-sysctl.rst | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 3abd494053a9..b67f2f83ff32 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -2941,6 +2941,20 @@ reconf_enable - BOOLEAN
 
 	Default: 0
 
+intl_enable - BOOLEAN
+        Enable or disable extension of User Message Interleaving functionality
+        specified in RFC8260. This extension allow the interleaving of user
+        messages sent on different streams. With this feature enabled, I-DATA
+        chunk will replace DATA chunk to carry user messages. Note that to use
+        this feature, with this option set to 1, we also need socket options
+        SCTP_FRAGMENT_INTERLEAVE set to 2 and SCTP_INTERLEAVING_SUPPORTED set
+        to 1.
+
+	- 1: Enable extension.
+	- 0: Disable extension.
+
+	Default: 0
+
 
 ``/proc/sys/net/core/*``
 ========================
-- 
2.31.1