ZTS: stress test concurrent zvol create/destroy

Sponsored-by: Klara, Inc.
Sponsored-by: Railway Corporation
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Fedor Uporov <fuporov.vstack@gmail.com>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #17625

tests/runfiles/common.run

@@ -1093,7 +1093,7 @@ tests = ['zvol_misc_002_pos', 'zvol_misc_hierarchy', 'zvol_misc_rename_inuse',
 tags = ['functional', 'zvol', 'zvol_misc']
 
 [tests/functional/zvol/zvol_stress]
-tests = ['zvol_stress']
+tests = ['zvol_stress', 'zvol_stress_destroy']
 tags = ['functional', 'zvol', 'zvol_stress']
 
 [tests/functional/zvol/zvol_swap]

tests/zfs-tests/tests/Makefile.am

@@ -2244,6 +2244,7 @@ nobase_dist_datadir_zfs_tests_tests_SCRIPTS += \
 	functional/zvol/zvol_stress/cleanup.ksh \
 	functional/zvol/zvol_stress/setup.ksh \
 	functional/zvol/zvol_stress/zvol_stress.ksh \
+	functional/zvol/zvol_stress/zvol_stress_destroy.ksh \
 	functional/zvol/zvol_swap/cleanup.ksh \
 	functional/zvol/zvol_swap/setup.ksh \
 	functional/zvol/zvol_swap/zvol_swap_001_pos.ksh \

tests/zfs-tests/tests/functional/zvol/zvol_stress/zvol_stress_destroy.ksh

@@ -0,0 +1,66 @@
+#!/bin/ksh -p
+# SPDX-License-Identifier: CDDL-1.0
+#
+# CDDL HEADER START
+#
+# The contents of this file are subject to the terms of the
+# Common Development and Distribution License (the "License").
+# You may not use this file except in compliance with the License.
+#
+# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+# or https://opensource.org/licenses/CDDL-1.0.
+# See the License for the specific language governing permissions
+# and limitations under the License.
+#
+# When distributing Covered Code, include this CDDL HEADER in each
+# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+# If applicable, add the following below this CDDL HEADER, with the
+# fields enclosed by brackets "[]" replaced with your own identifying
+# information: Portions Copyright [yyyy] [name of copyright owner]
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright (c) 2025, Klara, Inc.
+#
+
+. $STF_SUITE/include/libtest.shlib
+
+verify_runnable "global"
+
+typeset -i nzvols=1000
+typeset -i parallel=$(( $(get_num_cpus) * 2 ))
+
+function cleanup {
+  for zvol in $(zfs list -Ho name -t vol) ; do
+    log_must_busy zfs destroy $zvol
+  done
+}
+
+log_onexit cleanup
+
+log_assert "stress test concurrent zvol create/destroy"
+
+function destroy_zvols_until {
+  typeset cond=$1
+  while true ; do
+    IFS='' zfs list -Ho name -t vol | read -r -d '' zvols
+    if [[ -n $zvols ]] ; then
+      echo $zvols | xargs -n 1 -P $parallel zfs destroy
+    fi
+    if ! $cond ; then
+      break
+    fi
+  done
+}
+
+( seq $nzvols | \
+    xargs -P $parallel -I % zfs create -s -V 1G $TESTPOOL/testvol% ) &
+cpid=$!
+sleep 1
+
+destroy_zvols_until "kill -0 $cpid"
+destroy_zvols_until "false"
+
+log_pass "stress test done"