mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
130d7f0d1e
Set up an impossibly small filesystem and try to reflink and rewrite a file on it to see what happens when we ENOSPC. Basically generic/16[67] but with a constrained fs size. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
92 lines
2.2 KiB
Bash
Executable File
92 lines
2.2 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 166
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#
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# Test for races or FS corruption when DIO writing to a file that's also
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# the source of a reflink operation.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2015 Oracle, Inc. All Rights Reserved.
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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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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 7 15
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_cleanup()
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{
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cd /
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rm -rf $tmp.*
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wait
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}
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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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. ./common/reflink
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# real QA test starts here
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_supported_os Linux
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_require_scratch_reflink
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_require_cp_reflink
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_require_odirect
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echo "Format and mount"
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_scratch_mkfs > $seqres.full 2>&1
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_scratch_mount >> $seqres.full 2>&1
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testdir=$SCRATCH_MNT/test-$seq
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mkdir $testdir
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loops=1024
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nr_loops=$((loops - 1))
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blksz=65536
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echo "Initialize file"
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echo > $seqres.full
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_pwrite_byte 0x61 0 $((loops * blksz)) $testdir/file1 >> $seqres.full
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_scratch_remount
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# Snapshot creator...
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snappy() {
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n=0
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while [ ! -e $testdir/finished ]; do
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out="$(_cp_reflink $testdir/file1 $testdir/snap_$n 2>&1)"
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res=$?
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echo "$out" | grep -q "No space left" && break
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test -n "$out" && echo "$out"
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test $res -ne 0 && break
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n=$((n + 1))
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done
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}
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echo "Snapshot a file undergoing directio rewrite"
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snappy &
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seq $nr_loops -1 0 | while read i; do
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_pwrite_byte 0x63 $((i * blksz)) $blksz -d $testdir/file1 >> $seqres.full
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done
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touch $testdir/finished
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wait
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# success, all done
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status=0
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exit
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