lkml.org 
[lkml]   [2021]   [Dec]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH linux-next] Documentation: fix outdated interpretation of ip_no_pmtu_disc
Date
From: xu xin <xu.xin16@zte.com.cn>

The updating way of pmtu has changed, but documentation is still in the
old way. See commit-id 28d35bcdd3925e7293408cdb8aa5f2aac5f0d6e3. So This
patch fix interpretation of ip_no_pmtu_disc.

Besides, min_pmtu seems not to be discoverd, but set.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: xu xin <xu.xin16@zte.com.cn>
---
Documentation/networking/ip-sysctl.rst | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index c04431144f7a..dd5e53318805 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -25,9 +25,11 @@ ip_default_ttl - INTEGER
ip_no_pmtu_disc - INTEGER
Disable Path MTU Discovery. If enabled in mode 1 and a
fragmentation-required ICMP is received, the PMTU to this
- destination will be set to min_pmtu (see below). You will need
- to raise min_pmtu to the smallest interface MTU on your system
- manually if you want to avoid locally generated fragments.
+ destination will be set to the smallest of the old MTU
+ and ip_rt_min_pmtu (see __ip_rt_update_pmtu() in
+ net/ipv4/route.c). You will need to raise min_pmtu to the
+ smallest interface MTU on your system manually if you want to
+ avoid locally generated fragments.

In mode 2 incoming Path MTU Discovery messages will be
discarded. Outgoing frames are handled the same as in mode 1,
@@ -49,7 +51,7 @@ ip_no_pmtu_disc - INTEGER
Default: FALSE

min_pmtu - INTEGER
- default 552 - minimum discovered Path MTU
+ default 552 - minimum set Path MTU

ip_forward_use_pmtu - BOOLEAN
By default we don't trust protocol path MTUs while forwarding
--
2.25.1
\
 
 \ /
  Last update: 2021-12-29 04:13    [W:0.059 / U:2.824 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site