@@ -33,10 +33,13 @@
# - pmtu_vti4_link_add_mtu
# Set up vti4 interface passing MTU value at link creation, check MTU is
# configured, and that link is not created with invalid MTU values
+#
+# - pmtu_vti6_link_add_mtu
+# Same as above, for IPv6
tests="pmtu_vti4_exception pmtu_vti6_exception
pmtu_vti4_default_mtu pmtu_vti6_default_mtu
- pmtu_vti4_link_add_mtu"
+ pmtu_vti4_link_add_mtu pmtu_vti6_link_add_mtu"
NS_A="ns-$(mktemp -u XXXXXX)"
NS_B="ns-$(mktemp -u XXXXXX)"
@@ -349,6 +352,44 @@ test_pmtu_vti4_link_add_mtu() {
return ${pass}
}
+test_pmtu_vti6_link_add_mtu() {
+ setup namespaces && return 2
+
+ ${ns_a} ip link add vti6_a type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10
+ [ $? -ne 0 ] && echo " vti6 not supported" && return 2
+ ${ns_a} ip link del vti6_a
+
+ pass=1
+
+ min=1280
+ max=$((65535 - 40))
+ # Check invalid values first
+ for v in $((min - 1)) $((max + 1)); do
+ ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 2>/dev/null
+ # This can fail, or MTU can be adjusted to a proper value
+ [ $? -ne 0 ] && continue
+ mtu="$(link_get_mtu "${ns_a}" vti6_a)"
+ if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then
+ echo " vti6 tunnel created with invalid MTU ${v}"
+ pass=0
+ fi
+ ${ns_a} ip link del vti6_a
+ done
+
+ # Now check valid values
+ for v in 1280 1300 $((65535 - 40)); do
+ ${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10
+ mtu="$(link_get_mtu "${ns_a}" vti6_a)"
+ ${ns_a} ip link del vti6_a
+ if [ "${mtu}" != "${v}" ]; then
+ echo " vti6 MTU ${mtu} doesn't match configured value ${v}"
+ pass=0
+ fi
+ done
+
+ return ${pass}
+}
+
trap cleanup EXIT
exitcode=0
Same as pmtu_vti4_link_add_mtu test, but for IPv6. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> --- tools/testing/selftests/net/pmtu.sh | 43 ++++++++++++++++++++++++++++++++++++- 1 file changed, 42 insertions(+), 1 deletion(-)