diff options
| -rwxr-xr-x | tools/testing/selftests/net/pmtu.sh | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index d9f7ef2c213d..cd12a1f5c003 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -33,13 +33,17 @@ # - 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_vti6_exception vti6: PMTU exceptions pmtu_vti4_exception vti4: PMTU exceptions pmtu_vti4_default_mtu vti4: default MTU assignment pmtu_vti6_default_mtu vti6: default MTU assignment - pmtu_vti4_link_add_mtu vti4: MTU setting on link creation" + pmtu_vti4_link_add_mtu vti4: MTU setting on link creation + pmtu_vti6_link_add_mtu vti6: MTU setting on link creation" NS_A="ns-$(mktemp -u XXXXXX)" NS_B="ns-$(mktemp -u XXXXXX)" @@ -344,6 +348,44 @@ test_pmtu_vti4_link_add_mtu() { return ${fail} } +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 ] && err " vti6 not supported" && return 2 + ${ns_a} ip link del vti6_a + + fail=0 + + min=1280 + max=$((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 + err " vti6 tunnel created with invalid MTU ${v}" + fail=1 + 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 + err " vti6 MTU ${mtu} doesn't match configured value ${v}" + fail=1 + fi + done + + return ${fail} +} + trap cleanup EXIT exitcode=0 |