[src/trunk]: src/tests/sbin/ifconfig Test creating thousands of bridge(4)'s. ...

[jruoho <jruoho%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ff2b5efcfd38
branches:  trunk
changeset: 973283:ff2b5efcfd38
user:      jruoho <jruoho%NetBSD.org@localhost>
date:      Thu Jun 25 18:30:42 2020 +0000

description:
Test creating thousands of bridge(4)'s.  Unlike with tap(4) (PR kern/55417),
this test succeeeds. It is even possible to have the ultimate ifconfig(8)
output with more than 65,000 devices.

diffstat:

 distrib/sets/lists/tests/mi     |   3 +-
 tests/sbin/ifconfig/Makefile    |   4 +-
 tests/sbin/ifconfig/t_bridge.sh |  72 +++++++++++++++++++++++++++++++++++++++++
 tests/sbin/ifconfig/t_tap.sh    |   4 +-
 4 files changed, 78 insertions(+), 5 deletions(-)

diffs (126 lines):

diff -r f7149b5853da -r ff2b5efcfd38 distrib/sets/lists/tests/mi
--- a/distrib/sets/lists/tests/mi       Thu Jun 25 18:20:18 2020 +0000
+++ b/distrib/sets/lists/tests/mi       Thu Jun 25 18:30:42 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.853 2020/06/25 17:08:33 jruoho Exp $
+# $NetBSD: mi,v 1.854 2020/06/25 18:30:42 jruoho Exp $
 #
 # Note: don't delete entries from here - mark them as "obsolete" instead.
 #
@@ -3994,6 +3994,7 @@
 ./usr/tests/sbin/ifconfig                      tests-sbin-tests        compattestfile,atf
 ./usr/tests/sbin/ifconfig/Atffile              tests-sbin-tests        compattestfile,atf
 ./usr/tests/sbin/ifconfig/Kyuafile             tests-sbin-tests        compattestfile,atf,kyua
+./usr/tests/sbin/ifconfig/t_bridge             tests-sbin-tests        compattestfile,atf
 ./usr/tests/sbin/ifconfig/t_nonexistent                tests-sbin-tests        compattestfile,atf
 ./usr/tests/sbin/ifconfig/t_repeated_scan      tests-sbin-tests        compattestfile,atf
 ./usr/tests/sbin/ifconfig/t_repeated_updown    tests-sbin-tests        compattestfile,atf
diff -r f7149b5853da -r ff2b5efcfd38 tests/sbin/ifconfig/Makefile
--- a/tests/sbin/ifconfig/Makefile      Thu Jun 25 18:20:18 2020 +0000
+++ b/tests/sbin/ifconfig/Makefile      Thu Jun 25 18:30:42 2020 +0000
@@ -1,9 +1,9 @@
-# $NetBSD: Makefile,v 1.4 2020/06/25 15:41:40 jruoho Exp $
+# $NetBSD: Makefile,v 1.5 2020/06/25 18:30:42 jruoho Exp $
 
 .include <bsd.own.mk>
 
 TESTSDIR=      ${TESTSBASE}/sbin/ifconfig
 
-TESTS_SH=      t_nonexistent t_repeated_scan t_repeated_updown t_tap
+TESTS_SH=      t_bridge t_nonexistent t_repeated_scan t_repeated_updown t_tap
 
 .include <bsd.test.mk>
diff -r f7149b5853da -r ff2b5efcfd38 tests/sbin/ifconfig/t_bridge.sh
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/sbin/ifconfig/t_bridge.sh   Thu Jun 25 18:30:42 2020 +0000
@@ -0,0 +1,72 @@
+# $NetBSD: t_bridge.sh,v 1.1 2020/06/25 18:30:42 jruoho Exp $
+#
+# Copyright (c) 2020 The NetBSD Foundation, Inc.
+# All rights reserved.
+#
+# This code is derived from software contributed to The NetBSD Foundation
+# by Jukka Ruohonen.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+bridges="/tmp/bridges"
+
+atf_test_case manybridges cleanup
+manybridges_head() {
+       atf_set "require.user" "root"
+       atf_set "descr" "Test creating many, many bridge(4)'s"
+}
+
+manybridges_body() {
+
+       seq 65535 65000 > $bridges # Try to avoid stalling automated runs.
+
+       while read bridge; do
+
+               ifconfig "bridge$bridge" >/dev/null 2>&1
+
+               if [ $? -eq 0 ]; then
+                       echo "Skipping existing bridge$bridge"
+                       continue
+               fi
+
+               ifconfig "bridge$bridge" create
+               echo "Created bridge$bridge"
+
+       done < $bridges
+}
+
+manybridges_cleanup() {
+
+       if [ -f $bridges ]; then
+
+               while read bridge; do
+                       ifconfig "bridge$bridge" destroy >/dev/null 2>&1
+                       echo "Burnt down bridge$bridge"
+               done < $bridges
+
+               rm $bridges
+       fi
+}
+
+atf_init_test_cases() {
+       atf_add_test_case manybridges
+}
diff -r f7149b5853da -r ff2b5efcfd38 tests/sbin/ifconfig/t_tap.sh
--- a/tests/sbin/ifconfig/t_tap.sh      Thu Jun 25 18:20:18 2020 +0000
+++ b/tests/sbin/ifconfig/t_tap.sh      Thu Jun 25 18:30:42 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: t_tap.sh,v 1.4 2020/06/25 16:57:00 jruoho Exp $
+# $NetBSD: t_tap.sh,v 1.5 2020/06/25 18:30:42 jruoho Exp $
 #
 # Copyright (c) 2020 The NetBSD Foundation, Inc.
 # All rights reserved.
@@ -38,7 +38,7 @@
 manytaps_body() {
 
        atf_skip "The test causes a panic (PR kern/55417)"
-       seq 65535 64000 > $taps
+       seq 65535 65000 > $taps # Try to avoid stalling automated runs.
 
        while read tap; do