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#!/bin/bash
#
# CDDL HEADER START
#
# This file and its contents are supplied under the terms of the
# Common Development and Distribution License ("CDDL"), version 1.0.
# You may only use this file in accordance with the terms of version
# 1.0 of the CDDL.
#
# A full copy of the text of the CDDL should have accompanied this
# source. A copy of the CDDL is also available via the Internet at
# http://www.illumos.org/license/CDDL.
#
# CDDL HEADER END
#
#
# Copyright (c) 2015 by Delphix. All rights reserved.
# Copyright (C) 2016 Lawrence Livermore National Security, LLC.
#
BASE_DIR=$(dirname "$0")
SCRIPT_COMMON=common.sh
if [ -f "${BASE_DIR}/${SCRIPT_COMMON}" ]; then
. "${BASE_DIR}/${SCRIPT_COMMON}"
else
echo "Missing helper script ${SCRIPT_COMMON}" && exit 1
fi
# shellcheck disable=SC2034
PROG=zloop.sh
DEFAULTWORKDIR=/var/tmp
DEFAULTCOREDIR=/var/tmp/zloop
function usage
{
echo -e "\n$0 [-t <timeout>] [ -s <vdev size> ] [-c <dump directory>]" \
"[ -- [extra ztest parameters]]\n" \
"\n" \
" This script runs ztest repeatedly with randomized arguments.\n" \
" If a crash is encountered, the ztest logs, any associated\n" \
" vdev files, and core file (if one exists) are moved to the\n" \
" output directory ($DEFAULTCOREDIR by default). Any options\n" \
" after the -- end-of-options marker will be passed to ztest.\n" \
"\n" \
" Options:\n" \
" -t Total time to loop for, in seconds. If not provided,\n" \
" zloop runs forever.\n" \
" -s Size of vdev devices.\n" \
" -f Specify working directory for ztest vdev files.\n" \
" -c Specify a core dump directory to use.\n" \
" -h Print this help message.\n" \
"" >&2
}
function or_die
{
# shellcheck disable=SC2068
$@
# shellcheck disable=SC2181
if [[ $? -ne 0 ]]; then
# shellcheck disable=SC2145
echo "Command failed: $@"
exit 1
fi
}
# core file helpers
origcorepattern="$(cat /proc/sys/kernel/core_pattern)"
coreglob="$(egrep -o '^([^|%[:space:]]*)' /proc/sys/kernel/core_pattern)*"
if [[ $coreglob = "*" ]]; then
echo "Setting core file pattern..."
echo "core" > /proc/sys/kernel/core_pattern
coreglob="$(egrep -o '^([^|%[:space:]]*)' \
/proc/sys/kernel/core_pattern)*"
fi
function core_file
{
# shellcheck disable=SC2012 disable=2086
printf "%s" "$(ls -tr1 $coreglob 2> /dev/null | head -1)"
}
function core_prog
{
prog=$ZTEST
core_id=$($GDB --batch -c "$1" | grep "Core was generated by" | \
tr \' ' ')
# shellcheck disable=SC2076
if [[ "$core_id" =~ "zdb " ]]; then
prog=$ZDB
fi
printf "%s" "$prog"
}
function store_core
{
core="$(core_file)"
if [[ $ztrc -ne 0 ]] || [[ -f "$core" ]]; then
df -h "$workdir" >>ztest.out
coreid=$(date "+zloop-%y%m%d-%H%M%S")
foundcrashes=$((foundcrashes + 1))
dest=$coredir/$coreid
or_die mkdir -p "$dest"
or_die mkdir -p "$dest/vdev"
echo "*** ztest crash found - moving logs to $dest"
or_die mv ztest.history "$dest/"
or_die mv ztest.ddt "$dest/"
or_die mv ztest.out "$dest/"
or_die mv "$workdir/ztest*" "$dest/vdev/"
or_die mv "$workdir/zpool.cache" "$dest/vdev/"
# check for core
if [[ -f "$core" ]]; then
coreprog=$(core_prog "$core")
corestatus=$($GDB --batch --quiet \
-ex "set print thread-events off" \
-ex "printf \"*\n* Backtrace \n*\n\"" \
-ex "bt" \
-ex "printf \"*\n* Libraries \n*\n\"" \
-ex "info sharedlib" \
-ex "printf \"*\n* Threads (full) \n*\n\"" \
-ex "info threads" \
-ex "printf \"*\n* Backtraces \n*\n\"" \
-ex "thread apply all bt" \
-ex "printf \"*\n* Backtraces (full) \n*\n\"" \
-ex "thread apply all bt full" \
-ex "quit" "$coreprog" "$core" | grep -v "New LWP")
# Dump core + logs to stored directory
echo "$corestatus" >>"$dest/status"
or_die mv "$core" "$dest/"
# Record info in cores logfile
echo "*** core @ $coredir/$coreid/$core:" | \
tee -a ztest.cores
echo "$corestatus" | tee -a ztest.cores
echo "" | tee -a ztest.cores
fi
echo "continuing..."
fi
}
rngdpid=""
function on_exit
{
if [ -n "$rngdpid" ]; then
kill -9 "$rngdpid"
fi
}
trap on_exit EXIT
# parse arguments
# expected format: zloop [-t timeout] [-c coredir] [-- extra ztest args]
coredir=$DEFAULTCOREDIR
basedir=$DEFAULTWORKDIR
rundir="zloop-run"
timeout=0
size="512m"
while getopts ":ht:s:c:f:" opt; do
case $opt in
t ) [[ $OPTARG -gt 0 ]] && timeout=$OPTARG ;;
s ) [[ $OPTARG ]] && size=$OPTARG ;;
c ) [[ $OPTARG ]] && coredir=$OPTARG ;;
f ) [[ $OPTARG ]] && basedir=$(readlink -f "$OPTARG") ;;
h ) usage
exit 2
;;
* ) echo "Invalid argument: -$OPTARG";
usage
exit 1
esac
done
# pass remaining arguments on to ztest
shift $((OPTIND - 1))
# enable core dumps
ulimit -c unlimited
if [[ -f "$(core_file)" ]]; then
echo -n "There's a core dump here you might want to look at first... "
core_file
exit 1
fi
if [[ ! -d $coredir ]]; then
echo "core dump directory ($coredir) does not exist, creating it."
or_die mkdir -p "$coredir"
fi
if [[ ! -w $coredir ]]; then
echo "core dump directory ($coredir) is not writable."
exit 1
fi
or_die rm -f ztest.history
or_die rm -f ztest.ddt
or_die rm -f ztest.cores
# start rngd in the background so we don't run out of entropy
or_die read -r rngdpid < <(rngd -f -r /dev/urandom & echo $!)
ztrc=0 # ztest return value
foundcrashes=0 # number of crashes found so far
starttime=$(date +%s)
curtime=$starttime
# if no timeout was specified, loop forever.
while [[ $timeout -eq 0 ]] || [[ $curtime -le $((starttime + timeout)) ]]; do
zopt="-VVVVV"
# start each run with an empty directory
workdir="$basedir/$rundir"
or_die rm -rf "$workdir"
or_die mkdir "$workdir"
# switch between common arrangements & fully randomized
if [[ $((RANDOM % 2)) -eq 0 ]]; then
mirrors=2
raidz=0
parity=1
vdevs=2
else
mirrors=$(((RANDOM % 3) * 1))
parity=$(((RANDOM % 3) + 1))
raidz=$((((RANDOM % 9) + parity + 1) * (RANDOM % 2)))
vdevs=$(((RANDOM % 3) + 3))
fi
align=$(((RANDOM % 2) * 3 + 9))
runtime=$((RANDOM % 100))
passtime=$((RANDOM % (runtime / 3 + 1) + 10))
zopt="$zopt -m $mirrors"
zopt="$zopt -r $raidz"
zopt="$zopt -R $parity"
zopt="$zopt -v $vdevs"
zopt="$zopt -a $align"
zopt="$zopt -T $runtime"
zopt="$zopt -P $passtime"
zopt="$zopt -s $size"
zopt="$zopt -f $workdir"
# shellcheck disable=SC2124
cmd="$ZTEST $zopt $@"
desc="$(date '+%m/%d %T') $cmd"
echo "$desc" | tee -a ztest.history
echo "$desc" >>ztest.out
$cmd >>ztest.out 2>&1
ztrc=$?
egrep '===|WARNING' ztest.out >>ztest.history
$ZDB -U "$workdir/zpool.cache" -DD ztest >>ztest.ddt 2>&1
store_core
curtime=$(date +%s)
done
echo "zloop finished, $foundcrashes crashes found"
#restore core pattern
echo "$origcorepattern" > /proc/sys/kernel/core_pattern
uptime >>ztest.out
if [[ $foundcrashes -gt 0 ]]; then
exit 1
fi
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