[LTP] [PATCH 2/2] if-mtu-change.sh: Lower CHANGE_INTERVAL for netns

Petr Vorel
2021-02-05T14:20:51Z

to make testing faster.

NOTE: the default sleep 5s is needed for ssh based testing to prevent
link-flap errors on the switch. It can be lower down by user.

Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
.../network/stress/interface/if-mtu-change.sh | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/testcases/network/stress/interface/if-mtu-change.sh b/testcases/network/stress/interface/if-mtu-change.sh
index d2816606b..49ac5e3fc 100755
--- a/testcases/network/stress/interface/if-mtu-change.sh
+++ b/testcases/network/stress/interface/if-mtu-change.sh
@@ -1,6 +1,6 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
-# Copyright (c) 2017-2019 Petr Vorel <pvorel@suse.cz>
+# Copyright (c) 2017-2021 Petr Vorel <pvorel@suse.cz>
# Copyright (c) 2015-2017 Oracle and/or its affiliates. All Rights Reserved.
# Copyright (c) International Business Machines Corp., 2005
# Author: Mitsuru Chinen <mitch@jp.ibm.com>
@@ -12,9 +12,13 @@ TST_CLEANUP="do_cleanup"

# The interval of the mtu change [second]
CHANGE_INTERVAL=${CHANGE_INTERVAL:-5}
-
TST_TIMEOUT=$(((CHANGE_INTERVAL + 30) * MTU_CHANGE_TIMES))

+if tst_net_use_netns; then
+ CHANGE_INTERVAL="100ms"
+ TST_TIMEOUT=$((30 * MTU_CHANGE_TIMES))
+fi
+
# The array of the value which MTU is changed into sequentially
# 552 - net.ipv4.route.min_pmtu
CHANGE_VALUES="784 1142 552 1500 552 1500 552 748 552 1142 1500"
@@ -65,6 +69,7 @@ find_ipv4_max_packet_size()

do_setup()
{
+
[ "$TST_IPV6" ] && CHANGE_VALUES=$CHANGE6_VALUES
if_setup
saved_mtu="$(cat /sys/class/net/$(tst_iface)/mtu)"
@@ -83,9 +88,10 @@ do_cleanup()
test_body()
{
local cmd="$CMD"
+ local msg="'$cmd' changes MTU $MTU_CHANGE_TIMES times every $CHANGE_INTERVAL"

- tst_res TINFO "'$cmd' changes MTU $MTU_CHANGE_TIMES times" \
- "every $CHANGE_INTERVAL seconds"
+ tst_is_int $CHANGE_INTERVAL && msg="$msg seconds"
+ tst_res TINFO "$msg"

mtu_array_len=$(echo $CHANGE_VALUES | wc -w)
local cnt=0
--
2.30.0