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@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250508081910.84216-2-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh
index 7e1e563186253efa9aba18b7b21087f9cb8e1d62..7962da06f8162e5ae1d1438a92da0bbb299612e5 100644 (file)
--- 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[@]}")