netdev - [PATCH net-next 1/6] selftests: net: disable rp_filter after namespace initialization

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Message-ID: <20250507131856.78393-2-liuhangbin@gmail.com>
Date: Wed,  7 May 2025 13:18:51 +0000
From: Hangbin Liu <liuhangbin@...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>,
	Simon Horman <horms@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	Matthieu Baerts <matttbe@...nel.org>,
	Mat Martineau <martineau@...nel.org>,
	Geliang Tang <geliang@...nel.org>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Jozsef Kadlecsik <kadlec@...filter.org>,
	Andrea Mayer <andrea.mayer@...roma2.it>,
	Paolo Lungaroni <paolo.lungaroni@...roma2.it>,
	linux-kselftest@...r.kernel.org,
	mptcp@...ts.linux.dev,
	netfilter-devel@...r.kernel.org,
	coreteam@...filter.org,
	Hangbin Liu <liuhangbin@...il.com>
Subject: [PATCH net-next 1/6] selftests: net: disable rp_filter after namespace initialization

Some distributions enable rp_filter globally by default. To ensure consistent
behavior across environments, we explicitly disable it in several test cases.

This patch moves the rp_filter disabling logic to immediately after the
network namespace is initialized. With this change, individual test cases
with creating namespace via setup_ns no longer need to disable rp_filter
again.

This helps avoid redundancy and ensures test consistency.

Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
---
 tools/testing/selftests/net/lib.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh
index 7e1e56318625..7962da06f816 100644
--- a/tools/testing/selftests/net/lib.sh
+++ b/tools/testing/selftests/net/lib.sh
@@ -217,6 +217,8 @@ setup_ns()
 			return $ksft_skip
 		fi
 		ip -n "${!ns_name}" link set lo up
+		ip netns exec "${!ns_name}" sysctl -wq net.ipv4.conf.all.rp_filter=0
+		ip netns exec "${!ns_name}" sysctl -wq net.ipv4.conf.default.rp_filter=0
 		ns_list+=("${!ns_name}")
 	done
 	NS_LIST+=("${ns_list[@]}")
-- 
2.46.0