[PATCH net-next 2/2] selftests: net: Test bridge backup port when port is administratively down
From: Ido Schimmel <idosch@nvidia.com>
Date: 2025-08-12 08:06:37
Also in:
bridge
Subsystem:
kernel selftest framework, networking [general], the rest · Maintainers:
Shuah Khan, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Test that packets are redirected to the backup port when the primary port is administratively down. With the previous patch: # ./test_bridge_backup_port.sh [...] TEST: swp1 administratively down [ OK ] TEST: No forwarding out of swp1 [ OK ] TEST: Forwarding out of vx0 [ OK ] TEST: swp1 administratively up [ OK ] TEST: Forwarding out of swp1 [ OK ] TEST: No forwarding out of vx0 [ OK ] [...] Tests passed: 89 Tests failed: 0 Without the previous patch: # ./test_bridge_backup_port.sh [...] TEST: swp1 administratively down [ OK ] TEST: No forwarding out of swp1 [ OK ] TEST: Forwarding out of vx0 [FAIL] TEST: swp1 administratively up [ OK ] TEST: Forwarding out of swp1 [ OK ] [...] Tests passed: 85 Tests failed: 4 Signed-off-by: Ido Schimmel <idosch@nvidia.com> --- .../selftests/net/test_bridge_backup_port.sh | 31 ++++++++++++++++--- 1 file changed, 27 insertions(+), 4 deletions(-)
diff --git a/tools/testing/selftests/net/test_bridge_backup_port.sh b/tools/testing/selftests/net/test_bridge_backup_port.sh
index 1b3f89e2b86e..2a7224fe74f2 100755
--- a/tools/testing/selftests/net/test_bridge_backup_port.sh
+++ b/tools/testing/selftests/net/test_bridge_backup_port.sh@@ -315,6 +315,29 @@ backup_port() tc_check_packets $sw1 "dev vx0 egress" 101 1 log_test $? 0 "No forwarding out of vx0" + # Check that packets are forwarded out of vx0 when swp1 is + # administratively down and out of swp1 when it is administratively up + # again. + run_cmd "ip -n $sw1 link set dev swp1 down" + busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 disabled + log_test $? 0 "swp1 administratively down" + + run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1" + tc_check_packets $sw1 "dev swp1 egress" 101 3 + log_test $? 0 "No forwarding out of swp1" + tc_check_packets $sw1 "dev vx0 egress" 101 2 + log_test $? 0 "Forwarding out of vx0" + + run_cmd "ip -n $sw1 link set dev swp1 up" + busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 forwarding + log_test $? 0 "swp1 administratively up" + + run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1" + tc_check_packets $sw1 "dev swp1 egress" 101 4 + log_test $? 0 "Forwarding out of swp1" + tc_check_packets $sw1 "dev vx0 egress" 101 2 + log_test $? 0 "No forwarding out of vx0" + # Remove vx0 as the backup port of swp1 and check that packets are no # longer forwarded out of vx0 when swp1 does not have a carrier. run_cmd "bridge -n $sw1 link set dev swp1 nobackup_port"
@@ -322,9 +345,9 @@ backup_port() log_test $? 1 "vx0 not configured as backup port of swp1" run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1" - tc_check_packets $sw1 "dev swp1 egress" 101 4 + tc_check_packets $sw1 "dev swp1 egress" 101 5 log_test $? 0 "Forwarding out of swp1" - tc_check_packets $sw1 "dev vx0 egress" 101 1 + tc_check_packets $sw1 "dev vx0 egress" 101 2 log_test $? 0 "No forwarding out of vx0" run_cmd "ip -n $sw1 link set dev swp1 carrier off"
@@ -332,9 +355,9 @@ backup_port() log_test $? 0 "swp1 carrier off" run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1" - tc_check_packets $sw1 "dev swp1 egress" 101 4 + tc_check_packets $sw1 "dev swp1 egress" 101 5 log_test $? 0 "No forwarding out of swp1" - tc_check_packets $sw1 "dev vx0 egress" 101 1 + tc_check_packets $sw1 "dev vx0 egress" 101 2 log_test $? 0 "No forwarding out of vx0" }
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2.50.1