linux-kernel - [PATCH net-next v2 0/2] net: visibility of memory limits in netns

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Date: Fri, 31 May 2024 01:27:20 +0200
From: technoboy85@...il.com
To: netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Shuah Khan <shuah@...nel.org>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Matteo Croce <teknoraver@...a.com>
Subject: [PATCH net-next v2 0/2] net: visibility of memory limits in netns

From: Matteo Croce <teknoraver@...a.com>

Some programs need to know the size of the network buffers to operate
correctly, export the following sysctls read-only in network namespaces:

- net.core.rmem_default
- net.core.rmem_max
- net.core.wmem_default
- net.core.wmem_max

Matteo Croce (2):
  net: make net.core.{r,w}mem_{default,max} namespaced
  selftests: net: tests net.core.{r,w}mem_{default,max} sysctls in a
    netns

changes from v1:
- added SPDX header to test
- rewrite test with more detailed error messages

 net/core/sysctl_net_core.c                  | 75 ++++++++++++---------
 tools/testing/selftests/net/Makefile        |  1 +
 tools/testing/selftests/net/netns-sysctl.sh | 40 +++++++++++
 3 files changed, 83 insertions(+), 33 deletions(-)
 create mode 100755 tools/testing/selftests/net/netns-sysctl.sh

-- 
2.45.1