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https://github.com/linux-apfs/apfstests.git
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Lukas Czerner
0494a3c2f0
FITRIM ioctl is used on a mounted filesystem to discard (or "trim") blocks which are not in use by the filesystem. This is useful for solid-state drives (SSDs) and thinly-provi-sioned storage. This test helps to verify filesystem FITRIM implementation to assure that it does not corrupts data. This test creates checksums of all files in xfstests directory and run several processes which clear its working directory on SCRATCH_MNT, then copy everything from xfstests into its working directory, create list of files in working directory and its checksums and compare it with the original list of checksums. Every process works in the loop so it repeat remove->copy->check, while fstrim tool is running simultaneously. Fstrim is just a helper tool which uses FITRIM ioctl to actually do the filesystem discard. I found this very useful because when the FITRIM is really buggy (thus data-destroying) the 251 test will notice, because checksums will most likely change. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
175 lines
3.6 KiB
Bash
175 lines
3.6 KiB
Bash
#!/bin/bash
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# FS QA Test No. 251
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#
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# This test was created in order to verify filesystem FITRIM implementation.
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# By many concurrent copy and remove operations and checking that files
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# does not change after copied into SCRATCH_MNT test if FITRIM implementation
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# corrupts the filesystem (data/metadata).
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#
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#-----------------------------------------------------------------------
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# Copyright 2010 (C) Red Hat, Inc., Lukas Czerner <lczerner@redhat.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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owner=lczerner@redhat.com
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seq=`basename $0`
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echo "QA output created by $seq"
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here=`pwd`
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tmp=`mktemp -d`
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 3
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trap "_destroy; exit \$status" 2 15
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chpid=0
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mypid=$$
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_require_scratch
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_scratch_mkfs >/dev/null 2>&1
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_scratch_mount
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_cleanup()
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{
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rm -rf $tmp
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}
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_destroy()
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{
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kill $pids $fstrim_pid
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wait $pids $fstrim_pid
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rm -rf $tmp
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}
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_destroy_fstrim()
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{
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kill $fpid
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wait $fpid
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}
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_fail()
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{
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echo "$1"
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kill $mypid
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}
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_check_fstrim_support()
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{
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$here/src/fstrim -l 10M $SCRATCH_MNT &> /dev/null
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}
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##
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# Background FSTRIM loop. We are trimming the device in the loop and for
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# test coverage, we are doing whole device trim followed by several smaller
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# trims.
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##
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fstrim_loop()
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{
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trap "_destroy_fstrim; exit \$status" 2 15
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fsize=$(df | grep $SCRATCH_MNT | grep $SCRATCH_DEV | awk '{print $2}')
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while true ; do
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step=1048576
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start=0
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$here/src/fstrim $SCRATCH_MNT &
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fpid=$!
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wait $fpid
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while [ $start -lt $fsize ] ; do
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$here/src/fstrim -s ${start}k -l ${step}k $SCRATCH_MNT &
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fpid=$!
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wait $fpid
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start=$(( $start + $step ))
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done
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done
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}
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function check_sums() {
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(
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cd $SCRATCH_MNT/$p
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find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/stress.$$.$p
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)
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diff $tmp/content.sums $tmp/stress.$$.$p
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if [ $? -ne 0 ]; then
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_fail "!!!Checksums has changed - Filesystem possibly corrupted!!!\n"
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fi
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rm -f $tmp/stress.$$.$p
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}
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function run_process() {
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local p=$1
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repeat=10
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sleep $((5*$p))s &
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export chpid=$! && wait $chpid &> /dev/null
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chpid=0
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while [ $repeat -gt 0 ]; do
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# Remove old directories.
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rm -rf $SCRATCH_MNT/$p
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export chpid=$! && wait $chpid &> /dev/null
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# Copy content -> partition.
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mkdir $SCRATCH_MNT/$p
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cp -axT $content $SCRATCH_MNT/$p
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export chpid=$! && wait $chpid &> /dev/null
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check_sums
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repeat=$(( $repeat - 1 ))
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done
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}
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nproc=20
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content=$here
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# Check for FITRIM support
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echo -n "Checking FITRIM support: "
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_check_fstrim_support || _notrun "FSTRIM is not supported"
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echo "done."
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mkdir -p $tmp
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(
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cd $content
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find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/content.sums
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)
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echo -n "Running the test: "
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pids=""
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fstrim_loop &
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fstrim_pid=$!
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p=1
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while [ $p -le $nproc ]; do
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run_process $p &
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pids="$pids $!"
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p=$(($p+1))
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done
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echo "done."
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wait $pids
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kill $fstrim_pid
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wait $fstrim_pid
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status=0
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exit
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