[LTP] [RFC PATCH] network: Remove outdated DNS stress tests

[LTP] [RFC PATCH] network: Remove outdated DNS stress tests

[Avinesh Kumar via ltp]

From: Avinesh Kumar <avinesh.kumar@suse.com>

These tests start a local named server and run $NS_TIMES
(default: 10) dig queries from the remote host, forward and reverse.
The check is that the first and last query return NOERROR with one
answer record, and that no dig call in between exited non-zero.
They are also broken: dns-stress02-rmt.sh passes 'dig -n' for ipv6,
an option removed from bind long ago. dig prints "dig: -n removed",
sends no query and exits 0.
Remove these old broken tests based on legacy shell API.

Follow-up: 99c0b167d ("network: Remove outdated TCP stress tests")

Suggested-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Avinesh Kumar <avinesh.kumar@suse.com>
---
 runtest/net_stress.appl                       |   5 +-
 testcases/network/stress/README               |   6 +-
 .../network/stress/dns/00_Descriptions.txt    |   7 -
 testcases/network/stress/dns/Makefile         |  29 ---
 .../network/stress/dns/dns-stress-lib.sh      |  41 ----
 testcases/network/stress/dns/dns-stress.sh    | 204 ------------------
 .../network/stress/dns/dns-stress01-rmt.sh    |  73 -------
 .../network/stress/dns/dns-stress02-rmt.sh    |  78 -------
 8 files changed, 4 insertions(+), 439 deletions(-)
 delete mode 100644 testcases/network/stress/dns/00_Descriptions.txt
 delete mode 100644 testcases/network/stress/dns/Makefile
 delete mode 100644 testcases/network/stress/dns/dns-stress-lib.sh
 delete mode 100755 testcases/network/stress/dns/dns-stress.sh
 delete mode 100755 testcases/network/stress/dns/dns-stress01-rmt.sh
 delete mode 100755 testcases/network/stress/dns/dns-stress02-rmt.sh

diff --git a/runtest/net_stress.appl b/runtest/net_stress.appl
index 0da12717e439..fdbcac3f5a7e 100644
--- a/runtest/net_stress.appl
+++ b/runtest/net_stress.appl
@@ -1,13 +1,10 @@
 #
-# Stress test for major application protocol (ssh, dns, http, ftp)
+# Stress test for major application protocol (ssh, http, ftp)
 #
 
 ssh4-stress ssh-stress.sh
 ssh6-stress ssh-stress.sh -6
 
-dns4-stress dns-stress.sh
-dns6-stress dns-stress.sh -6
-
 http4-stress http-stress.sh
 http6-stress http-stress.sh -6
 
diff --git a/testcases/network/stress/README b/testcases/network/stress/README
index b9537b1ce039..57427cac5db6 100644
--- a/testcases/network/stress/README
+++ b/testcases/network/stress/README
@@ -61,8 +61,8 @@ Attention for HTTP/FTP stress tests
 
 When you run http or ftp stress tests, you have to start http or ftp server
 before running the tests.
-About ssh and dns tests, you don't need to run the ssh or dns server.  Each
-test runs named or sshd automatically.
+About ssh tests, you don't need to run the ssh server.  Each test runs sshd
+automatically.
 
 Those tests requires that the remote host has `curl' command in order to
 upload/download files to/from the local host.
@@ -159,7 +159,7 @@ Optional environment variables
  o NS_TIMES (for the repetition test)
    The number of repetition times for the repetition tests.
    This value affects IP adress add/del testcase, IP address change testcase
-   route add/del testcase and dns query tests.
+   route add/del testcase.
 
  o CONNECTION_TOTAL (for creating a large number of connection test)
    The total number of connection when the testcase requires plural connection.
diff --git a/testcases/network/stress/dns/00_Descriptions.txt b/testcases/network/stress/dns/00_Descriptions.txt
deleted file mode 100644
index bc6583c4157a..000000000000
--- a/testcases/network/stress/dns/00_Descriptions.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-dns-stress01
-	Verify the dns server or the kernel is not down after handling
-	many name lookup queries
-
-dns-stress02
-	Verify the dns server or the kernel is not down after handling
-	many reverse lookup queries
diff --git a/testcases/network/stress/dns/Makefile b/testcases/network/stress/dns/Makefile
deleted file mode 100644
index 4c34ee24b6ab..000000000000
--- a/testcases/network/stress/dns/Makefile
+++ /dev/null
@@ -1,29 +0,0 @@
-#
-#    network/stress/dns test suite Makefile.
-#
-#    Copyright (C) 2009, Cisco Systems Inc.
-#
-#    This program is free software; you can redistribute it and/or modify
-#    it under the terms of the GNU General Public License as published by
-#    the Free Software Foundation; either version 2 of the License, or
-#    (at your option) any later version.
-#
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU General Public License for more details.
-#
-#    You should have received a copy of the GNU General Public License along
-#    with this program; if not, write to the Free Software Foundation, Inc.,
-#    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-#
-# Ngie Cooper, July 2009
-#
-
-top_srcdir		?= ../../../..
-
-include $(top_srcdir)/include/mk/env_pre.mk
-
-INSTALL_TARGETS		:= *.sh
-
-include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/network/stress/dns/dns-stress-lib.sh b/testcases/network/stress/dns/dns-stress-lib.sh
deleted file mode 100644
index d85f6e3f3422..000000000000
--- a/testcases/network/stress/dns/dns-stress-lib.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/bin/sh
-# Copyright (c) 2017 Oracle and/or its affiliates. All Rights Reserved.
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; either version 2 of
-# the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it would be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-. test.sh
-
-TST_CLEANUP=tst_rmdir
-
-dns_check_answer()
-{
-	local fname="$1"
-
-	if ! grep -q 'status: NOERROR' $fname; then
-		cat $fname
-		tst_brkm TFAIL "unexpected query status"
-	fi
-	if ! grep -q 'QUERY: 1, ANSWER: 1' $fname; then
-		cat $fname
-		tst_brkm TFAIL "unexpected number of query/answer"
-	fi
-}
-
-dns_check_send_requests()
-{
-	[ $num -eq $connect_quantity ] && return
-	tst_brkm TFAIL "some requests failed: $num/$connect_quantity"
-}
-
-tst_tmpdir
diff --git a/testcases/network/stress/dns/dns-stress.sh b/testcases/network/stress/dns/dns-stress.sh
deleted file mode 100755
index c90366605f1a..000000000000
--- a/testcases/network/stress/dns/dns-stress.sh
+++ /dev/null
@@ -1,204 +0,0 @@
-#!/bin/sh
-# Copyright (c) 2015-2017 Oracle and/or its affiliates. All Rights Reserved.
-# Copyright (c) International Business Machines  Corp., 2005
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; either version 2 of
-# the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it would be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write the Free Software Foundation,
-# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-#
-# Author: Mitsuru Chinen <mitch@jp.ibm.com>
-
-TCID=dns-stress
-TST_TOTAL=2
-TST_CLEANUP="cleanup"
-
-TST_USE_LEGACY_API=1
-
-# Minimum host ID in the zone file.
-# The ID is used as the host portion of the address
-MIN_ID=2
-# Maximum host ID in the zone file.
-MAX_ID=254
-# Domain name for testing
-DOMAIN="ltp-ns.org"
-
-cleanup()
-{
-	# Stop the dns daemon
-	test -s named.pid && kill -9 $(cat named.pid) > /dev/null
-	tst_rmdir
-}
-
-common_setup()
-{
-	tst_require_root
-	tst_require_cmds named dig
-
-	if [ "$TST_IPV6" ]; then
-		record="AAAA"
-		net="fd00:cafe"
-		net_rev="0.0.0.0.0.0.0.0.e.f.a.c.0.0.d.f"
-	else
-		record="A"
-		net="10.23.0"
-		net_rev="0.23.10"
-	fi
-
-	trap "tst_brkm TBROK 'test interrupted'" INT
-
-	tst_tmpdir
-
-	ip6_opt=
-	[ "$TST_IPV6" ] && ip6_opt="listen-on-v6 { any; };"
-
-	ip_zone_opt="in-addr"
-	[ "$TST_IPV6" ] && ip_zone_opt="ip6"
-
-	cat << EOD > named.conf
-	options {
-		directory "$(pwd)";
-		pid-file "named.pid";
-		recursion no;
-		$ip6_opt
-	};
-
-	zone "$DOMAIN" {
-		type master;
-		file "ltp-ns.zone";
-	};
-
-	zone "$net_rev.$ip_zone_opt.arpa" {
-		type master;
-		file "ltp-ns.rev";
-	};
-EOD
-
-	# zone file
-	cat << EOD > ltp-ns.zone
-\$TTL 10
-@	IN	SOA dns.$DOMAIN. root.$DOMAIN. (
-	2005092701 ; serial
-	3600       ; dummy value
-	900        ; dummy value
-	604800     ; dummy value
-	86400      ; dummy value
-)
-	IN	NS	dns.$DOMAIN.
-EOD
-}
-
-setup_4()
-{
-	printf "dns\tIN\tA\t$net.1\n" >> ltp-ns.zone
-	local id=$MIN_ID
-	while [ $id -le $MAX_ID ]; do
-		printf "node$id\tIN\tA\t$net.$id\n" >> ltp-ns.zone
-		id=$(($id + 1))
-	done
-
-	# reverse zone file
-	cat << EOD > ltp-ns.rev
-\$TTL 10
-@	IN	SOA $DOMAIN. root.$DOMAIN. (
-	2005092701 ; serial
-	3600       ; dummy value
-	900        ; dummy value
-	604800     ; dummy value
-	86400      ; dummy value
-)
-        IN      NS      dns.$DOMAIN.
-EOD
-
-	id=$MIN_ID
-	while [ $id -le $MAX_ID ]; do
-		printf "$id\tIN\tPTR\tnode$id.$DOMAIN.\n" >> ltp-ns.rev
-		id=$(($id + 1))
-	done
-}
-
-setup_6()
-{
-	printf "dns\tIN\tAAAA\t$net::1\n" >> ltp-ns.zone
-	local id=$MIN_ID
-	while [ $id -le $MAX_ID ]; do
-		printf "node$id\tIN\tAAAA\t$net::%x\n" $id >> ltp-ns.zone
-		id=$(($id + 1))
-	done
-
-	# reverse zone file
-	cat << EOD > ltp-ns.rev
-\$TTL 10
-@	IN	SOA $DOMAIN. root.$DOMAIN. (
-	2005092701 ; serial
-	3600       ; dummy value
-	900        ; dummy value
-	604800     ; dummy value
-	86400      ; dummy value
-)
-        IN      NS      dns.$DOMAIN.
-EOD
-
-	id=$MIN_ID
-	local rev_ip="0.0.0.0.0.0.0.0.0.0.0.0.0.0"
-	while [ $id -le $MAX_ID ]; do
-		printf "%x.%x.$rev_ip\tIN\tPTR\tnode$id.$DOMAIN.\n" \
-			$(($id % 16)) $(($id / 16)) >> ltp-ns.rev
-		id=$(($id + 1))
-	done
-}
-
-start_named()
-{
-	chmod 770 .
-	chmod 660 ./*
-
-	port=$(tst_get_unused_port ipv${TST_IPVER} dgram)
-
-	tst_resm TINFO "Start named daemon, port $port"
-	named -$TST_IPVER -c named.conf -p $port || \
-		tst_brkm TBROK "Failed to run named daemon"
-
-	# Make sure named.pid is created.
-	while true ; do
-		test -s named.pid && break
-		tst_sleep 100ms
-	done
-}
-
-test01()
-{
-	tst_resm TINFO "Handling name lookup queries '$NS_TIMES' times"
-
-	tst_rhost_run -s -c "dns-stress01-rmt.sh $TST_IPVER $(tst_ipaddr) $port \
-		$DOMAIN $MIN_ID $MAX_ID $NS_TIMES"
-
-	tst_resm TPASS "Test is finished successfully"
-}
-
-test02()
-{
-	tst_resm TINFO "Handling reverse lookup queries '$NS_TIMES' times"
-
-	tst_rhost_run -s -c "dns-stress02-rmt.sh $TST_IPVER $(tst_ipaddr) $port $net \
-		$MIN_ID $MAX_ID $NS_TIMES"
-
-	tst_resm TPASS "Test is finished successfully"
-}
-
-. tst_net.sh
-common_setup
-setup_$TST_IPVER
-start_named
-test01
-test02
-tst_exit
diff --git a/testcases/network/stress/dns/dns-stress01-rmt.sh b/testcases/network/stress/dns/dns-stress01-rmt.sh
deleted file mode 100755
index 71b7d8de5083..000000000000
--- a/testcases/network/stress/dns/dns-stress01-rmt.sh
+++ /dev/null
@@ -1,73 +0,0 @@
-#!/bin/sh
-# Copyright (c) 2015-2017 Oracle and/or its affiliates. All Rights Reserved.
-# Copyright (c) International Business Machines  Corp., 2005
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; either version 2 of
-# the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it would be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write the Free Software Foundation,
-# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-#
-# Author: Mitsuru Chinen <mitch@jp.ibm.com>
-
-TCID=dns-stress01-rmt
-TST_TOTAL=1
-
-. dns-stress-lib.sh
-
-# Check the arguments
-if [ $# -ne 7 ]; then
-	tst_brkm TBROK "Usage: $0 ip_ver srv_ipaddr port domain \
-min_id max_id connect_quantity"
-fi
-
-ip_ver="$1"
-srv_ipaddr="$2"
-port="$3"
-domain="$4"
-min_id="$5"
-max_id="$6"
-connect_quantity="$7"
-
-# Specify the record of dns accoring to the version of IP
-case $ip_ver in
-4)
-	record="A" ;;
-6)
-	record="AAAA" ;;
-*)
-	tst_brkm TBROK "$ver_opt is unknown IP version" ;;
-esac
-
-# Check the connectivity first
-dig @$srv_ipaddr -p $port node${min_id}.${domain} $record > ans.log 2>&1 || \
-	tst_brkm TBROK "Failed to connect $srv_ipaddr"
-dns_check_answer ans.log
-
-# Loop for a large number of name lookup queries
-num=0
-id=$min_id
-while [ $num -lt $connect_quantity ]; do
-	dig @$srv_ipaddr -p $port node${id}.${domain} $record \
-		> /dev/null || break
-	id=$(($id + 1))
-	[ $id -gt $max_id ] && id=$min_id
-	num=$(($num + 1))
-done
-
-# Check the connectivity again
-dig @$srv_ipaddr -p $port node${id}.${domain} $record > ans.log 2>&1 || \
-	tst_brkm TBROK "Failed to connect $srv_ipaddr"
-dns_check_answer ans.log
-
-dns_check_send_requests
-
-tst_exit
diff --git a/testcases/network/stress/dns/dns-stress02-rmt.sh b/testcases/network/stress/dns/dns-stress02-rmt.sh
deleted file mode 100755
index 58fd60f31a4e..000000000000
--- a/testcases/network/stress/dns/dns-stress02-rmt.sh
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/bin/sh
-# Copyright (c) 2015-2017 Oracle and/or its affiliates. All Rights Reserved.
-# Copyright (c) International Business Machines  Corp., 2006
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; either version 2 of
-# the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it would be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write the Free Software Foundation,
-# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-#
-# Author: Mitsuru Chinen <mitch@jp.ibm.com>
-
-TCID=dns-stress02-rmt
-TST_TOTAL=1
-
-. dns-stress-lib.sh
-
-if [ $# -ne 7 ]; then
-	tst_brkm TBROK "Usage: $0 ip_ver srv_ipaddr port net \
-min_id max_id connect_quantity"
-fi
-
-ip_ver="$1"
-srv_ipaddr="$2"
-port="$3"
-net="$4"
-min_id="$5"
-max_id="$6"
-connect_quantity="$7"
-
-# Specify the option of dns according to the version of IP
-case $ip_ver in
-4)
-	opt=""
-	sep="."
-;;
-6)
-	opt="-n"
-	sep="::"
-;;
-*)
-	tst_brkm TBROK "$ver_opt is unknown IP version" ;;
-esac
-
-# Check the connectivity first
-dig @$srv_ipaddr $opt -p $port -x ${net}${sep}${min_id} $record \
-	> ans.log 2>&1 || \
-	tst_brkm TBROK "Failed to connect $srv_ipaddr"
-dns_check_answer ans.log
-
-# Loop for a large number of reverse name lookup queries
-num=0
-id=$min_id
-while [ $num -lt $connect_quantity ]; do
-	dig @$srv_ipaddr $opt -p $port -x ${net}${sep}${id} $record \
-		> /dev/null || break
-	id=$(($id + 1))
-	[ $id -gt $max_id ] && id=$min_id
-	num=$(($num + 1))
-done
-
-# Check the connectivity again
-dig @$srv_ipaddr $opt -p $port -x ${net}${sep}${min_id} $record \
-	> ans.log 2>&1 || \
-	tst_brkm TBROK "Failed to connect $srv_ipaddr"
-dns_check_answer ans.log
-
-dns_check_send_requests
-
-tst_exit
-- 
2.55.0


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Re: [LTP] network: Remove outdated DNS stress tests

[linuxtestproject.agent]

Hi Avinesh,

On July 31, 2026, Avinesh Kumar wrote:
> network: Remove outdated DNS stress tests

Verdict - Reviewed

---
Note:

The agent can sometimes produce false positives although often its
findings are genuine. If you find issues with the review, please
comment this email or ignore the suggestions.

Regards,
LTP AI Reviewer

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Mailing list info: https://lists.linux.it/listinfo/ltp

Re: [LTP] [RFC PATCH] network: Remove outdated DNS stress tests

[Petr Vorel]

Hi Avinesh,

> These tests start a local named server and run $NS_TIMES
> (default: 10) dig queries from the remote host, forward and reverse.
> The check is that the first and last query return NOERROR with one
> answer record, and that no dig call in between exited non-zero.
> They are also broken: dns-stress02-rmt.sh passes 'dig -n' for ipv6,
> an option removed from bind long ago. dig prints "dig: -n removed",
> sends no query and exits 0.
> Remove these old broken tests based on legacy shell API.

Thanks, I always wanted to delete them.

Reviewed-by: Petr Vorel <pvorel@suse.cz>

> Follow-up: 99c0b167d ("network: Remove outdated TCP stress tests")

...
> +++ b/runtest/net_stress.appl
> @@ -1,13 +1,10 @@

> -# Stress test for major application protocol (ssh, dns, http, ftp)
> +# Stress test for major application protocol (ssh, http, ftp)


>  ssh4-stress ssh-stress.sh
>  ssh6-stress ssh-stress.sh -6

FYI removal of SSH stress tests ...

> -dns4-stress dns-stress.sh
> -dns6-stress dns-stress.sh -6
> -
>  http4-stress http-stress.sh
>  http6-stress http-stress.sh -6

... and HTTP stress tests is blocked by

https://github.com/linux-test-project/ltp/issues/1207

Kind regards,
Petr

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Re: [LTP] [RFC PATCH] network: Remove outdated DNS stress tests

[Andrea Cervesato via ltp]

Burn them with fire!

Acked-by: Andrea Cervesato <andrea.cervesato@suse.com>

Thanks,
--
Andrea Cervesato
SUSE QE Automation Engineer Linux
andrea.cervesato@suse.com

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Re: [LTP] [RFC PATCH] network: Remove outdated DNS stress tests

[Cyril Hrubis]

Hi!
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] [RFC PATCH] network: Remove outdated DNS stress tests

[Petr Vorel]

Hi Avinesh,

thanks for your patch, merged!

Kind regards,
Petr

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