Currently, the second bridge command overwrites the first one. Fix this by adding this VID to the interface behind $swp2.

The one_bridge_two_pvids() test intends to check that there is no leakage of traffic between bridge ports which have a single VLAN - the PVID VLAN.

Because of a typo, port $swp1 is configured with a PVID twice (second command overwrites first), and $swp2 isn't configured at all (and since the bridge vlan_default_pvid property is set to 0, this port will not have a PVID at all, so it will drop all untagged and priority-tagged traffic).

So, instead of testing the configuration that was intended, we are testing a different one, where one port has PVID 2 and the other has no PVID. This incorrect version of the test should also pass, but is ineffective for its purpose, so fix the typo.

This typo has an impact on results of the test results, potentially leading to wrong conclusions regarding the functionality of a network device.

Fixes: 476a4f05d9b8 ("selftests: forwarding: add a no_forwarding.sh test") Reviewed-by: Hangbin Liu liuhangbin@gmail.com Reviewed-by: Shuah Khan skhan@linuxfoundation.org Signed-off-by: Kacper Ludwinski kac.ludwinski@icloud.com --- tools/testing/selftests/net/forwarding/no_forwarding.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

v4: - Add revision history od this patch - Add "Reviewed-by:" - Limit number of characters in commit to 80 - Add impact explanation to commit message v3: - Edit commit message - Add missing Signed-off-by - Link: https://lore.kernel.org/linux-kselftest/20240927112824.339-1-kac.ludwinski@i... v2: - Add missing CCs - Fix typo in commit message - Add target name - Link: https://lore.kernel.org/linux-kselftest/fQknN_r6POzmrp8UVjyA3cknLnB1HB9I_jfa... v1: - Link: https://lore.kernel.org/linux-kselftest/20240925050539.1906-1-kacper@ludwins...

diff --git a/tools/testing/selftests/net/forwarding/no_forwarding.sh b/tools/testing/selftests/net/forwarding/no_forwarding.sh index 9e677aa64a06..694ece9ba3a7 100755 --- a/tools/testing/selftests/net/forwarding/no_forwarding.sh +++ b/tools/testing/selftests/net/forwarding/no_forwarding.sh @@ -202,7 +202,7 @@ one_bridge_two_pvids() ip link set $swp2 master br0

bridge vlan add dev $swp1 vid 1 pvid untagged - bridge vlan add dev $swp1 vid 2 pvid untagged + bridge vlan add dev $swp2 vid 2 pvid untagged

run_test "Switch ports in VLAN-aware bridge with different PVIDs"