Add a couple of new tests, explicitly checking that the kernel
timely releases pmtu exceptions on related device removal.
This is mostly a regression test vs the issue fixed by:
https://patchwork.ozlabs.org/patch/1045488/
Only 2 new test cases have been added, instead of extending all
the existing ones, because the reproducer requires executing
several commands and would slow down too much the tests otherwise.
Signed-off-by: Paolo Abeni <pab...@redhat.com>
---
tools/testing/selftests/net/pmtu.sh | 52 ++++++++++++++++++++++++++++-
1 file changed, 51 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/pmtu.sh
b/tools/testing/selftests/net/pmtu.sh
index 634e91e8fe25..4bc72bc26899 100755
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -135,7 +135,9 @@ tests="
pmtu_vti6_default_mtu vti6: default MTU assignment
pmtu_vti4_link_add_mtu vti4: MTU setting on link creation
pmtu_vti6_link_add_mtu vti6: MTU setting on link creation
- pmtu_vti6_link_change_mtu vti6: MTU changes on link changes"
+ pmtu_vti6_link_change_mtu vti6: MTU changes on link changes
+ pmtu_ipv4_exception_cleanup ipv4: cleanup of cached exceptions
+ pmtu_ipv6_exception_cleanup ipv6: cleanup of cached exceptions"
NS_A="ns-$(mktemp -u XXXXXX)"
NS_B="ns-$(mktemp -u XXXXXX)"
@@ -1006,6 +1008,54 @@ test_pmtu_vti6_link_change_mtu() {
return ${fail}
}
+test_cleanup_vxlanY_or_geneveY_exception() {
+ outer="${1}"
+ encap="${2}"
+ ll_mtu=4000
+
+ which taskset 2>/dev/null | return 2
+ which timeout 2>/dev/null | return 2
+ cpu_list=`grep processor /proc/cpuinfo | cut -d ' ' -f 2`
+
+ setup namespaces routing ${encap}${outer} || return 2
+ trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \
+ "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
+ "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B
+
+ # Create route exception by exceeding link layer MTU
+ mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000))
+ mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
+ mtu "${ns_b}" veth_B-R1 ${ll_mtu}
+ mtu "${ns_r1}" veth_R1-B ${ll_mtu}
+
+ mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000))
+ mtu "${ns_b}" ${encap}_b $((${ll_mtu} + 1000))
+
+ # fill exception cache for multiple cpus [2]
+ # we can always use inner ipv4 for that
+ ncpus=0
+ for cpu in $cpu_list; do
+ taskset --cpu-list ${cpu} ${ns_a} ping -q -M want -i 0.1 -w 1
-s $((${ll_mtu} + 500)) ${tunnel4_b_addr} > /dev/null
+ ncpus=$((ncpus + 1))
+ [ ${ncpus} -gt 1 ] && break
+ done
+
+ fail=0
+ if ! timeout 1 ${ns_a} ip link del dev veth_A-R1; then
+ err " can't delete veth device in a timely manner, pmtu dst
likely leaked"
+ fail=1
+ fi
+ return ${fail}
+}
+
+test_pmtu_ipv6_exception_cleanup() {
+ test_cleanup_vxlanY_or_geneveY_exception 6 vxlan
+}
+
+test_pmtu_ipv4_exception_cleanup() {
+ test_cleanup_vxlanY_or_geneveY_exception 4 vxlan
+}
+
usage() {
echo
echo "$0 [OPTIONS] [TEST]..."
--
2.20.1
