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[49.186.89.135]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-736984f7115sm1904388b3a.105.2025.03.06.13.39.25 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Mar 2025 13:39:25 -0800 (PST) Received: from [192.168.253.23] (helo=devoid.disaster.area) by dread.disaster.area with esmtp (Exim 4.98) (envelope-from ) id 1tqIw6-00000009lRc-2T6O for fstests@vger.kernel.org; Fri, 07 Mar 2025 08:39:22 +1100 Received: from dave by devoid.disaster.area with local (Exim 4.98) (envelope-from ) id 1tqIw6-0000000FvrR-3Fvh for fstests@vger.kernel.org; Fri, 07 Mar 2025 08:39:22 +1100 From: Dave Chinner To: fstests@vger.kernel.org Subject: [PATCH 3/5] fstests: remove crash script Date: Fri, 7 Mar 2025 08:34:48 +1100 Message-ID: <20250306213921.3769440-4-david@fromorbit.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250306213921.3769440-1-david@fromorbit.com> References: <20250306213921.3769440-1-david@fromorbit.com> Precedence: bulk X-Mailing-List: fstests@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Dave Chinner This is an old, early 2000s SGI era script for crash and recovery testing XFS filesystems. We have much better ways of doing this today with tools like dm-error, dm-flakey, etc. Nobody has been using this script for years, so remove it. Signed-off-by: Dave Chinner --- crash/README | 151 -------------- crash/rc.sysinit | 46 ----- crash/xfscrash | 506 ----------------------------------------------- 3 files changed, 703 deletions(-) delete mode 100644 crash/README delete mode 100644 crash/rc.sysinit delete mode 100755 crash/xfscrash diff --git a/crash/README b/crash/README deleted file mode 100644 index 36f2ec65e..000000000 --- a/crash/README +++ /dev/null @@ -1,151 +0,0 @@ -############ -# xfscrash # crash testing setup for XFS -############ - -*** disclaimers *** - - work-in-progress, buyer-beware, your-mileage-may-vary, this-is-a-hack - -*** what xfscrash does *** - - xfscrash allows realistic testing of XFS log recovery and XFS check/repair - by generating log activity on an XFS partition, then rebooting the machine - at a random point. When the machine comes back up, xfscrash is restarted - and then tests either the log recovery or xfs_repair on the dirtied - filesystem. All going well the process continues. - -*** getting ready for crash testing *** - - Most filesystems (ext2 included) can't withstand having the machine - they're running on rebooted while they're active. So the crash test - machine needs to have all filesystems other than the test FS mounted - read-only so they won't get trashed when the machine reboots. - -*** mouting FSes read-only *** - - Following is a recipe for making a redhat linux (6.2) machine with a single - ext2 FS mounted on root able to be booted read-only. Your Mileage May - Vary - don't try this on an important machine. - - The idea is to move anything that needs to be r/w into the /initrd_init - directory, replacing the moved directories with links to the moved ones. - That way the /initrd_init directory may be copied to a ramdisk, and - mounted over /initrd on the root FS which never gets remounted r/w. - - # go to single user - init 1 - - # make a mount point for the ramdisk - mkdir /initrd - - # link across to the /initrd_init directory for when - # the ramdisk isn't mounted - ln -s /initrd_init/dev . - ln -s /initrd_init/etc . - ln -s /initrd_init/proc . - ln -s /initrd_init/sbin . - ln -s /initrd_init/tmp . - ln -s /initrd_init/var . - - # make the /initrd_init directory - mkdir /initrd_init - cd /initrd_init - - - # move /dev - mv /dev . - ln -s /dev /initrd/dev - - # move /etc - mv /etc . - ln -s /etc /initrd/etc - - # make proc mount - mkdir proc - - # move /tmp - mkdir tmp - rm -rf /tmp - ln -s /tmp /initrd/tmp - - # link /sbin - ln -s /sbin . - - # setup a tree for parts of /var - mkdir var var/cache var/lock var/lock/console var/lock/subsys - mkdir var/log var/preserve var/run - - touch /var/run/utmp /var/log/utmp /var/log/wtmp - - # move parts of /var - rm -rf /var/cache /var/lock /var/log /var/preserve /var/run - ln -s /initrd/var/cache /var/cache - ln -s /initrd/var/lock /var/lock - ln -s /initrd/var/log /var/log - ln -s /initrd/var/preserve /var/preserve - ln -s /initrd/var/run /var/run - - # make a mount for /var/shm - mkdir var/shm - ln -s /var/shm /initrd/var/shm - - # move /var/spool - mkdir var/spool - mkdir var/spool/mail var/spool/anacron var/spool/at var/spool/lpd - mkdir var/spool/rwho var/spool/mqueue var/spool/cron - rm -rf /var/spool - ln -s /var/spool /initrd/var/spool - - # move /var/tmp - mkdir var/tmp - rm -rf /var/tmp - ln -s /var/tmp /initrd/var/tmp - - # trim /dev - too many inodes here - remove anything you don't need - # (small ramdisk has a small number of inodes) - rm -rf /initrd/dev/<....> - - All going well, all the directories you've made should link through - /initrd and into /initrd_init, and the machine should come back up - if you restart it. - - You want to keep the contents of /initrd_init to a minimum because - this stuff has to fit into the ramdisk. - -*** getting the ramdisk going *** - - See the rc.sysinit file for some details of what to do to get the - ro-root/ramdisk up and running. - - Once everything is going, the root FS should never be remounted to - r/w on boot and should be in r/o mode when the machine comes up. - - All going well, any open files have been redirected through the - symlinks onto the ramdisk, so you should be able to remount the - root FS to r/w and then remount it back to r/o. - - Since there's no r/w filesystems mounted, it should be ok to - reboot the machine with 'reboot -fn' and everything should come - back without dirty filesystems and without having to fsck. - -*** starting xfscrash *** - - The simplest way to restart xfscrash on reboot is to start it - in the background from rc.local. The script logs to /dev/tty1, - /dev/console & a logfile by default, so the output should be - easy to find. - - Link the xfscrash directory off an NFS mounted FS so you can make - changes while the machine is rebooting and so you can touch the - 'stop' and 'start' control files. - - To configure the system, change the parameters in the configuration - section of the 'xfscrash' script. - - To start the system, touch the 'start' control file and then either - reboot or manually run the 'xfscrash' script. - - To stop the system, touch the 'stop' control file and wait for the - next cycle to start when the control file will be checked and - the test terminated. - diff --git a/crash/rc.sysinit b/crash/rc.sysinit deleted file mode 100644 index 0f0781a79..000000000 --- a/crash/rc.sysinit +++ /dev/null @@ -1,46 +0,0 @@ -# -# Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved. -# -# xfscrash - control the XFS crash tests -# - -# this is an example of what to add to rc.sysinit on a redhat linux -# system to get the ro-root/ramdisk system up and running - -if [ -f /initrd.active ] -then - echo "*** MAKE RAMDISK ***" - dd if=/dev/zero of=/dev/ram0 bs=1024k count=4 - mkfs -i 1024 /dev/ram0 4096 - echo "*** MOUNT RAMDISK ***" - mount -n -w /dev/ram0 /mnt - echo "*** INIT RAMDISK ***" - cp -a /initrd_init/* /mnt - rm -f /mnt/00_INITRD_REAL - touch /mnt/00_INITRD_RAMDISK - umount -n /mnt - echo "*** REMOUNT RAMDISK ***" - mount -n /dev/ram0 /initrd - - echo "*** FIX MTAB ***" - >/etc/mtab - rm -f /etc/mtab~ /etc/mtab~~ - mount -f -o ro / - mount -f -o rw /dev/ram0 /initrd -else - # old code - - # Remount the root filesystem read-write. - action "Remounting root filesystem in read-write mode" mount -n -o remount,rw / - - # Clear mtab - >/etc/mtab - - # Remove stale backups - rm -f /etc/mtab~ /etc/mtab~~ - - # Enter root and /proc into mtab. - mount -f / - mount -f /proc - -fi diff --git a/crash/xfscrash b/crash/xfscrash deleted file mode 100755 index 037b3df1e..000000000 --- a/crash/xfscrash +++ /dev/null @@ -1,506 +0,0 @@ -#!/bin/sh -# -# Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved. -# -# xfscrash - control the XFS crash tests -# - - ####################### -### configuration stuff ######################################################## - ####################### - -# remount, repair or corrupt -MODE=remount -# where to find xfscrash -XFSCRASH=/xfscrash -# put log files here -LOG=$XFSCRASH -# put output to these places -OUTPUT="$LOG/xfscrash.log /dev/tty1 /dev/console" -# awk... -AWK_PROG=gawk -# clear FS if >= this percent full at start of run. 100 is a good -# number - only used on corrupt test so far -FULL_LIMIT=80 - -case `hostname -s` -in - leesa) - # mount test partition here - TEST_MNT=/mnt/arch0 - # build test partition here - TEST_DEV=/dev/hda6 - # backup test partition to here (or empty) - BACKUP_DEV=/dev/hda8 - # backup block size for dd - BACKUP_BS=1024k - # base stress time - STRESS_TIME=60 - # stress random time - STRESS_RANDOM=60 - ;; - lumpy) - # mount test partition here - TEST_MNT=/mnt/scratch_0 - # build test partition here - TEST_DEV=/dev/sdc5 - # backup test partition to here (or empty) - BACKUP_DEV= ;#/dev/sdc6 - # backup block size for dd - BACKUP_BS=10240k - # base stress time - STRESS_TIME=360 - # stress random time - STRESS_RANDOM=360 - ;; - *) - echo "!!! no configuration data for host `hostname -s`" - exit 1 - ;; -esac - -# avoid stress - -AVOID="-f resvsp=0 -f unresvsp=0" - -# DIY stress command -STRESS="/usr/local/bin/fsstress -d $TEST_MNT/stress -n 10000000 -p 1 $AVOID" -#STRESS="/usr/local/bin/randholes -l 10000000 -c 100000 -b 512 $TEST_MNT/stress/holes" - -# stress command for the corrupt test -CORRUPT_STRESS="/usr/local/bin/fsstress -d $TEST_MNT/stress -n 10000 -p 1 $AVOID" - -########################################################################### - -reboot=-1 - -_log() -{ - tee -a $OUTPUT > /dev/null -} - -_echo() -{ - echo "$*" | _log -} - -_mount() -{ - _echo " *** Mounting $TEST_DEV on $TEST_MNT" - if ! mount -t xfs $TEST_DEV $TEST_MNT - then - _echo " !!! unable to mount" - exit 1 - fi -} - -_unmount() -{ - _echo " *** Unmounting $TEST_DEV" - if ! umount $TEST_DEV &> /dev/null - then - _echo " !!! unable to unmount" - exit 1 - fi -} - -_check() -{ - expect=$1 - fail=0 - - if [ $expect -eq 0 ] - then - _echo " *** xfs_repair -n ($LOG/repair_clean.out)" - xfs_repair -n $TEST_DEV &> $LOG/repair_clean.out || fail=1 - fi - - if [ $fail -eq 0 ] - then - _echo " *** FS checks ok" - else - if [ $expect -eq 0 ] - then - _echo " !!! FS check failed - inconsistent FS" - _echo " !!! (see $LOG/*.out for details)" - exit 1 - else - _echo " *** inconsistent fs (as expected)" - fi - fi -} - -_check_core() -{ - if [ -e core ] - then - _echo " !!! core file found!" - exit 1 - fi -} - -_repair() -{ - rm -f core - _echo " *** repair" - _echo " *** repair pass 1 (RO)" - xfs_repair -n $TEST_DEV &> $LOG/repair_1.out \ - && _echo " !!! no errors found (eh?)" \ - || _echo " *** errors found (expected)" - - _check_core - - _echo " *** repair pass 2 (RW)" - - if xfs_repair $TEST_DEV &> $LOG/repair_2.out - then - _echo " *** FS checks ok (now)" - else - _echo " !!! xfs_repair returned error code" - _echo " !!! (see $LOG/repair_*.out for details)" - exit 1 - fi - - _check_core - - _echo " *** repair pass 3 (RO)" - if xfs_repair -n $TEST_DEV &> $LOG/repair_3.out - then - _echo " *** FS checks ok" - else - _echo " !!! errors found after repair (unexpected)" - _echo " !!! (see $LOG/repair_*.out for details)" - exit 1 - fi - - _check_core -} - -_cleanup() -{ - rm -f $XFSCRASH/counter $XFSCRASH/start $XFSCRASH/stop $XFSCRASH/active - - if [ $reboot != -1 ] - then - kill $reboot - fi - -} - -_random() -{ - od -tu -N 4 /dev/random | gawk -v v=$1 'NR==1 { print $2 % v }' -} - -_backup() -{ - if [ $count -ne 1 -a "$BACKUP_DEV" != "" ] - then - _echo " *** Backing up $TEST_DEV to $BACKUP_DEV" - if ! dd if=$TEST_DEV of=$BACKUP_DEV bs=$BACKUP_BS &> $LOG/dd.out - then - _echo " !!! unable to backup fs" - _echo " !!! (see $LOG/dd.out)" - exit 1 - fi - else - _echo " *** skipping back up step" - fi -} - -_logprint() -{ - _echo " *** dumping log to $LOG/logprint.out" - rm -f core - xfs_logprint $TEST_DEV &> $LOG/logprint.out - if [ -e core ] - then - _echo " !!! xfs_logprint dumped core" - echo "" >> $LOG/logprint.out - echo "*** CORE DUMPED ***" >> $LOG/logprint.out - echo "" >> $LOG/logprint.out - fi - - _echo " *** dumping log (-t -i) to $LOG/logprint_inode.out" - - rm -f core - xfs_logprint -t -i $TEST_DEV &> $LOG/logprint_inode.out - if [ -e core ] - then - _echo " !!! xfs_logprint dumped core" - echo "" >> $LOG/logprint_inode.out - echo "*** CORE DUMPED ***" >> $LOG/logprint_inode.out - echo "" >> $LOG/logprint_inode.out - fi - - _echo " *** dumping log (-t -b) to $LOG/logprint_buf.out" - - rm -f core - xfs_logprint -t -b $TEST_DEV &> $LOG/logprint_buf.out - if [ -e core ] - then - _echo " !!! xfs_logprint dumped core" - echo "" >> $LOG/logprint_buf.out - echo "*** CORE DUMPED ***" >> $LOG/logprint_buf.out - echo "" >> $LOG/logprint_buf.out - fi -} -# -# _df_device : get an IRIX style df line for a given device -# -# - returns "" if not mounted -# - returns fs type in field two (ala IRIX) -# - joins line together if split by fancy df formatting -# - strips header etc -# - -_df_device() -{ - if [ $# -ne 1 ] - then - echo "Usage: _df_device device" >&2 - exit 1 - fi - - df -T 2> /dev/null | $AWK_PROG -v what=$1 ' - match($1,what) && NF==1 { - v=$1 - getline - print v, $0 - exit - } - match($1,what) { - print - exit - } - ' -} - -# -# _df_dir : get an IRIX style df line for device where a directory resides -# -# - returns fs type in field two (ala IRIX) -# - joins line together if split by fancy df formatting -# - strips header etc -# - -_df_dir() -{ - if [ $# -ne 1 ] - then - echo "Usage: _df_dir device" >&2 - exit 1 - fi - - df -T $1 2> /dev/null | $AWK_PROG -v what=$1 ' - NR == 2 && NF==1 { - v=$1 - getline - print v, $0; - exit 0 - } - NR == 2 { - print; - exit 0 - } - {} - ' - # otherwise, nada -} - -# return percentage used disk space for mounted device - -_used() -{ - if [ $# -ne 1 ] - then - echo "Usage: _used device" >&2 - exit 1 - fi - - _df_device $1 | $AWK_PROG '{ sub("%", "") ; print $6 }' -} - -_check_free() -{ - used=`_used $TEST_DEV` - - if [ $used -ge $FULL_LIMIT ] - then - _echo " *** $used % used on $TEST_DEV - deleting files" - rm -rf $TEST_MNT/stress - fi -} - -# loop, stressing, unounting and checking -# no (expected) rebooting... -_corrupt() -{ - count=0 - - # don't want to restart if we reboot... - _cleanup - - while true - do - - if [ -e $XFSCRASH/stop ] - then - _echo "### XFS Crash stopped " - exit 0 - fi - - _echo "*** run $count" - let "count = count + 1" - - _check 0 - _mount - - _check_free - - $CORRUPT_STRESS | _log - - _unmount - done -} - -########################################################################### - -_echo "" -_echo "" -echo "XFSCRASH [output to $OUTPUT]" -_echo "" - -if [ "$1" = "start" ] -then - touch $XFSCRASH/start -fi - -if [ "$1" = "stop" ] -then - touch $XFSCRASH/stop -fi - - -trap "_cleanup; exit \$status" 0 1 2 3 15 - - -if [ -e $XFSCRASH/stop ] -then - _echo "### XFS Crash stopped " - exit 0 -fi - -if [ -e $XFSCRASH/start ] -then - _echo "### XFS Crash started " - _cleanup - rm -f $LOG/*.out $LOG/*.log core - - touch $XFSCRASH/active - - _echo " *** Building fresh XFS FS" - umount $TEST_DEV &> /dev/null - if ! mkfs -t xfs -f $TEST_DEV &> $LOG/mkfs.out - then - _echo " !!! unable to mkfs" - _echo " !!! (see $LOG/mkfs.out)" - exit 1 - fi -fi - -if [ ! -e $XFSCRASH/active ] -then - _echo "### XFS Crash inactive " - exit 0 -fi - - -if [ -r $XFSCRASH/counter ] -then - count=`cat $XFSCRASH/counter` -else - count=0 -fi -_echo "### Crash test run $count (mode=$MODE, log=$LOG/{*.out,*.log})" - -let "count = count +1" -echo $count > $XFSCRASH/counter - -# real test starts here - -_echo " *** Checking for R/O root" -if ! mount | grep "on / type" | grep -q "(ro)" -then - _echo " !!! root not mounted readonly" - exit 1 -fi - -_echo " *** Loading XFS modules" -if ! modprobe xfs -then - _echo " !!! unable to modprobe xfs" - exit 1 -fi - -_echo " *** Unmounting $TEST_DEV" -umount $TEST_DEV &> /dev/null - -_logprint -if [ $MODE != "corrupt" ] -then - _backup -fi - -case $MODE -in - remount) - _check 1 # expect errors - _mount - _unmount - ;; - repair) - _repair - ;; - corrupt) - _corrupt - exit 0 - ;; - *) - _echo "xfscrash: MODE must be remount or repair" - exit 1 - ;; -esac - -_check 0 # don't expect errors -_mount - -_echo " *** Cleaning XFS FS" -if ! rm -rf $TEST_MNT/stress $TEST_MNT/lost+found &> $LOG/clean.out -then - _echo " !!! unable to clean XFS FS" - _echo " !!! (see $LOG/clean.out)" - exit 1 -fi - -_echo " *** Making stress directory" -if ! mkdir $TEST_MNT/stress -then - _echo " !!! unable to mkdir stress" - exit 1 -fi - -let "bang = STRESS_TIME + `_random $STRESS_RANDOM`" - -_echo " *** Preparing random reboot (in $bang seconds)" -( - sleep $bang - _echo " *** BANG ****" - reboot -fn -) & -reboot=$! - -_echo " *** Causing stress & waiting for the inevitable" -$STRESS | _log - -exit 0