From a381ed12ea33888a08f0e3e5ba22a255fa5f7257 Mon Sep 17 00:00:00 2001 From: Petr Machata Date: Thu, 20 Sep 2018 09:21:35 +0300 Subject: [PATCH] selftests: forwarding: lib: Add mtu_set(), mtu_restore() Some selftests need to tweak MTU of an interface, and naturally should at teardown restore the MTU back to the original value. Add two functions to facilitate this MTU handling: mtu_set() to change MTU value, and mtu_reset() to change it back to what it was before. Signed-off-by: Petr Machata Reviewed-by: Jiri Pirko Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- tools/testing/selftests/net/forwarding/lib.sh | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 4c2351996a7f..0e73698b2048 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -549,6 +549,23 @@ forwarding_restore() sysctl_restore net.ipv4.conf.all.forwarding } +declare -A MTU_ORIG +mtu_set() +{ + local dev=$1; shift + local mtu=$1; shift + + MTU_ORIG["$dev"]=$(ip -j link show dev $dev | jq -e '.[].mtu') + ip link set dev $dev mtu $mtu +} + +mtu_restore() +{ + local dev=$1; shift + + ip link set dev $dev mtu ${MTU_ORIG["$dev"]} +} + tc_offload_check() { local num_netifs=${1:-$NUM_NETIFS} -- 2.30.2