1#! /usr/local/bin/ksh93 -p 2# 3# CDDL HEADER START 4# 5# The contents of this file are subject to the terms of the 6# Common Development and Distribution License (the "License"). 7# You may not use this file except in compliance with the License. 8# 9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10# or http://www.opensolaris.org/os/licensing. 11# See the License for the specific language governing permissions 12# and limitations under the License. 13# 14# When distributing Covered Code, include this CDDL HEADER in each 15# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16# If applicable, add the following below this CDDL HEADER, with the 17# fields enclosed by brackets "[]" replaced with your own identifying 18# information: Portions Copyright [yyyy] [name of copyright owner] 19# 20# CDDL HEADER END 21# 22 23# $FreeBSD$ 24 25# 26# Copyright 2013 Spectra Logic. All rights reserved. 27# Use is subject to license terms. 28# 29# 30. $STF_SUITE/include/libtest.kshlib 31 32################################################################################ 33# 34# __stc_assertion_start 35# 36# ID: snapshot_019_pos 37# 38# DESCRIPTION: 39# Accessing snapshots and unmounting them in parallel does not panic. 40# FreeBSD PR kern/184677 41# 42# STRATEGY: 43# 1. Create a dataset 44# 2. Set the snapdir property to visible 45# 3. Do the following in parallel 46# a. Repeatedly access the snapshot 47# b. Repeatedly unmount the snapshot 48# 4. Verify that the system does not panic 49# 50# TESTABILITY: explicit 51# 52# TEST_AUTOMATION_LEVEL: automated 53# 54# CODING_STATUS: COMPLETED (2013-12-23) 55# 56# __stc_assertion_end 57# 58################################################################################ 59 60verify_runnable "both" 61 62KILL_SWITCH=${PWD}/kill_switch 63 64function stat_snapshot 65{ 66 while [ ! -f ${KILL_SWITCH} ]; do 67 cd $SNAPDIR # Exercise forced unmount 68 stat "$SNAPDIR" > /dev/null 2>&1 69 done 70} 71 72function ls_snapshot 73{ 74 # Pre-generate the argument list. 75 ls_args="" 76 for ((num=0; $num<100; num=$num+1)); do 77 ls_args="$ls_args $SNAPDIR/.." 78 done 79 80 while [ ! -f ${KILL_SWITCH} ]; do 81 ls $ls_args >/dev/null 2>&1 82 done 83} 84 85log_assert "Accessing snapshots and unmounting them in parallel does not panic" 86 87log_must dataset_setprop $TESTPOOL "snapdir" "visible" 88 89# Take snapshots 90log_must $ZFS snapshot "$TESTPOOL/$TESTFS@$TESTSNAP" 91 92# Repeatedly access the snapshot directory 93stat_snapshot & 94stat_pid="$!" 95ls_snapshot & 96ls_pid="$!" 97 98# Repeatedly unmount the snapshot directory 99for ((i=0; $i<100; i=$i+1)); do 100 umount "$SNAPDIR" >/dev/null 2>&1 101 log_note "$i non-forced done" 102 # Sleep just long enough for the other "threads" to remount. 103 sleep 0.1 104 umount -f "$SNAPDIR" >/dev/null 2>&1 105 log_note "$i forced done" 106 sleep 0.1 107done 108 109# Kill the other "threads" and wait for them to die. 110touch $KILL_SWITCH 111log_note "Waiting for all child processes to die..." 112wait 113 114# Test that no reference leaks occurred and we can cleanup without forcing. 115log_must $ZFS unmount $TESTPOOL/$TESTFS 116log_must $ZFS destroy -r $TESTPOOL/$TESTFS 117 118# If we get here, we managed to not panic, deadlock, or leak references. 119log_pass 120