diff options
| -rwxr-xr-x | tools/testing/selftests/net/pmtu.sh | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index ba11433d17d8..d9f7ef2c213d 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -29,12 +29,17 @@ # # - pmtu_vti6_default_mtu # Same as above, for IPv6 +# +# - 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 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_vti6_default_mtu vti6: default MTU assignment + pmtu_vti4_link_add_mtu vti4: MTU setting on link creation" NS_A="ns-$(mktemp -u XXXXXX)" NS_B="ns-$(mktemp -u XXXXXX)" @@ -301,6 +306,44 @@ test_pmtu_vti6_default_mtu() { fi } +test_pmtu_vti4_link_add_mtu() { + setup namespaces || return 2 + + ${ns_a} ip link add vti4_a type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 + [ $? -ne 0 ] && err " vti not supported" && return 2 + ${ns_a} ip link del vti4_a + + fail=0 + + min=68 + max=$((65528 - 20)) + # Check invalid values first + for v in $((min - 1)) $((max + 1)); do + ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_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}" vti4_a)" + if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then + err " vti tunnel created with invalid MTU ${mtu}" + fail=1 + fi + ${ns_a} ip link del vti4_a + done + + # Now check valid values + for v in ${min} 1300 ${max}; do + ${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 + mtu="$(link_get_mtu "${ns_a}" vti4_a)" + ${ns_a} ip link del vti4_a + if [ "${mtu}" != "${v}" ]; then + err " vti MTU ${mtu} doesn't match configured value ${v}" + fail=1 + fi + done + + return ${fail} +} + trap cleanup EXIT exitcode=0 |