linux-kernel - [PATCH v3 0/3] Namespaceify two sysctls related with route

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Message-Id: <20220830091453.286285-1-xu.xin16@zte.com.cn>
Date:   Tue, 30 Aug 2022 09:14:53 +0000
From:   cgel.zte@...il.com
To:     davem@...emloft.net, kuba@...nel.org, yoshfuji@...ux-ipv6.org,
        dsahern@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        xu.xin16@....com.cn
Subject: [PATCH v3 0/3] Namespaceify two sysctls related with route

From: xu xin <xu.xin16@....com.cn>

With the rise of cloud native, more and more container applications are
deployed. The network namespace is one of the foundations of the container.
The sysctls of error_cost and error_burst are important knobs to control
the sending frequency of ICMP_DEST_UNREACH packet for ipv4. When different
containers has requirements on the tuning of error_cost and error_burst,
for host's security, the sysctls should exist per network namespace.

Different netns has different requirements on the setting of error_cost
and error_burst, which are related with limiting the frequency of sending
ICMP_DEST_UNREACH packets. Enable them to be configured per netns.

xu xin (3):
  ipv4: Namespaceify route/error_cost knob
  ipv4: Namespaceify route/error_burst knob
  ipv4: add documentation of two sysctls about icmp

 Documentation/networking/ip-sysctl.rst | 17 ++++++++++++
 include/net/netns/ipv4.h               |  2 ++
 net/ipv4/route.c                       | 36 ++++++++++++++------------
 3 files changed, 39 insertions(+), 16 deletions(-)

-- 
2.25.1