On Wed, Nov 06, 2024 at 01:30:07PM +0000, Vladimir Vdovin wrote:
> +test_pmtu_ipv4_mp_exceptions() {
> + setup namespaces routing multipath || return $ksft_skip
> +
> + trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
> + "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \
> + "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \
> + "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2
> +
> + # Set up initial MTU values
> + mtu "${ns_a}" veth_A-R1 2000
> + mtu "${ns_r1}" veth_R1-A 2000
> + mtu "${ns_r1}" veth_R1-B 1500
> + mtu "${ns_b}" veth_B-R1 1500
> +
> + mtu "${ns_a}" veth_A-R2 2000
> + mtu "${ns_r2}" veth_R2-A 2000
> + mtu "${ns_r2}" veth_R2-B 1500
> + mtu "${ns_b}" veth_B-R2 1500
> +
> + fail=0
> +
> + # Ping and expect two nexthop exceptions for two routes in nh group
> + run_cmd ${ns_a} ping -q -M want -i 0.1 -c 1 -s 1800 "${host4_b_addr}"
> +
> + # Do route lookup before checking cached exceptions.
> + # The following commands are needed for dst entries to be cached
> + # in both paths exceptions and therefore dumped to user space
> + # Check that exceptions have been created with the correct PMTU
> + pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}"
> oif veth_A-R1)"
> + pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}"
> oif veth_A-R2)"
This overrides the first PMTU
> +
> + check_pmtu_value "1500" "${pmtu}" "exceeding MTU (veth_A-R2)" || return
> 1
> + check_pmtu_value "1500" "${pmtu}" "exceeding MTU (veth_A-R1)" || return
> 1
> +
> + return ${fail}
And "fail" does not seem to be used anymore.
Can you squash the following diff to v9?
diff --git a/tools/testing/selftests/net/pmtu.sh
b/tools/testing/selftests/net/pmtu.sh
index 9e34b54d9c15..1b4d4c598d66 100755
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -2396,22 +2396,14 @@ test_pmtu_ipv4_mp_exceptions() {
mtu "${ns_r2}" veth_R2-B 1500
mtu "${ns_b}" veth_B-R2 1500
- fail=0
-
# Ping and expect two nexthop exceptions for two routes in nh group
run_cmd ${ns_a} ping -q -M want -i 0.1 -c 1 -s 1800 "${host4_b_addr}"
- # Do route lookup before checking cached exceptions.
- # The following commands are needed for dst entries to be cached
- # in both paths exceptions and therefore dumped to user space
# Check that exceptions have been created with the correct PMTU
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}"
oif veth_A-R1)"
+ check_pmtu_value "1500" "${pmtu}" "exceeding MTU (veth_A-R1)" || return
1
pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}"
oif veth_A-R2)"
-
check_pmtu_value "1500" "${pmtu}" "exceeding MTU (veth_A-R2)" || return
1
- check_pmtu_value "1500" "${pmtu}" "exceeding MTU (veth_A-R1)" || return
1
-
- return ${fail}
}
usage() {
