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# 24# Copyright 2013 Spectra Logic. All rights reserved. 25# Use is subject to license terms. 26# 27# 28. $STF_SUITE/include/libtest.kshlib 29 30################################################################################ 31# 32# __stc_assertion_start 33# 34# ID: snapshot_019_pos 35# 36# DESCRIPTION: 37# Accessing snapshots and unmounting them in parallel does not panic. 38# FreeBSD PR kern/184677 39# 40# STRATEGY: 41# 1. Create a dataset 42# 2. Set the snapdir property to visible 43# 3. Do the following in parallel 44# a. Repeatedly access the snapshot 45# b. Repeatedly unmount the snapshot 46# 4. Verify that the system does not panic 47# 48# TESTABILITY: explicit 49# 50# TEST_AUTOMATION_LEVEL: automated 51# 52# CODING_STATUS: COMPLETED (2013-12-23) 53# 54# __stc_assertion_end 55# 56################################################################################ 57 58verify_runnable "both" 59 60KILL_SWITCH=${PWD}/kill_switch 61 62function stat_snapshot 63{ 64 while [ ! -f ${KILL_SWITCH} ]; do 65 cd $SNAPDIR # Exercise forced unmount 66 stat "$SNAPDIR" > /dev/null 2>&1 67 done 68} 69 70function ls_snapshot 71{ 72 # Pre-generate the argument list. 73 ls_args="" 74 for ((num=0; $num<100; num=$num+1)); do 75 ls_args="$ls_args $SNAPDIR/.." 76 done 77 78 while [ ! -f ${KILL_SWITCH} ]; do 79 ls $ls_args >/dev/null 2>&1 80 done 81} 82 83log_assert "Accessing snapshots and unmounting them in parallel does not panic" 84 85log_must dataset_setprop $TESTPOOL "snapdir" "visible" 86 87# Take snapshots 88log_must $ZFS snapshot "$TESTPOOL/$TESTFS@$TESTSNAP" 89 90# Repeatedly access the snapshot directory 91stat_snapshot & 92stat_pid="$!" 93ls_snapshot & 94ls_pid="$!" 95 96# Repeatedly unmount the snapshot directory 97for ((i=0; $i<100; i=$i+1)); do 98 umount "$SNAPDIR" >/dev/null 2>&1 99 log_note "$i non-forced done" 100 # Sleep just long enough for the other "threads" to remount. 101 sleep 0.1 102 umount -f "$SNAPDIR" >/dev/null 2>&1 103 log_note "$i forced done" 104 sleep 0.1 105done 106 107# Kill the other "threads" and wait for them to die. 108touch $KILL_SWITCH 109log_note "Waiting for all child processes to die..." 110wait 111 112# Test that no reference leaks occurred and we can cleanup without forcing. 113log_must $ZFS unmount $TESTPOOL/$TESTFS 114log_must $ZFS destroy -r $TESTPOOL/$TESTFS 115 116# If we get here, we managed to not panic, deadlock, or leak references. 117log_pass 118