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authorStefano Brivio <sbrivio@redhat.com>2018-03-17 04:31:45 +0300
committerDavid S. Miller <davem@davemloft.net>2018-03-18 03:15:14 +0300
commit719e121574497436e39536c2a888b901fbe30cfe (patch)
tree95b48ec74497be02738edebf295fa5dc27fce181 /tools/testing/selftests/net/pmtu.sh
parent5e84430bb83e8241c485ccce728ff5e5e80789eb (diff)
downloadlinux-719e121574497436e39536c2a888b901fbe30cfe.tar.xz
selftests: pmtu: Add pmtu_vti4_link_add_mtu test
This test checks that MTU given on vti link creation is actually configured, and that tunnel is not created with an invalid MTU value. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/net/pmtu.sh')
-rwxr-xr-xtools/testing/selftests/net/pmtu.sh45
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