mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
2616587012
Fix style problems such as unnecessary use of quotes, add helper variables to reduce visual clutter, and other minor fixes to make the first batch of tests more closely resemble the second round tests. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
112 lines
3.4 KiB
Bash
Executable File
112 lines
3.4 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 154
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#
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# Ensure that CoW on all copies of a file reflinked N times increases block count
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# - Record fs block usage (0)
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# - Create a file and some reflink copies
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# - Record fs block usage (1)
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# - CoW some blocks of the copies
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# - Record fs block usage (2)
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# - CoW all the rest of the blocks of the copies
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# - Compare fs block usage to (2), (1), and (0)
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2015, Oracle and/or its affiliates. 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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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 15
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_cleanup()
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{
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cd /
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rm -rf $tmp.* $testdir
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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_test_reflink
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_require_cp_reflink
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rm -f $seqres.full
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testdir=$TEST_DIR/test-$seq
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rm -rf $testdir
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mkdir $testdir
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echo "Create the original file blocks"
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blksz="$(stat -f $testdir -c '%S')"
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blks=2000
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margin='15%'
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free_blocks0=$(stat -f $testdir -c '%f')
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nr=4
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filesize=$((blksz * nr))
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sz=$((blks * blksz))
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_pwrite_byte 0x61 0 $sz $testdir/file1 >> $seqres.full
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_test_remount
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echo "Create the reflink copies"
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for i in `seq 2 $nr`; do
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_cp_reflink $testdir/file1 $testdir/file$i
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done
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_test_remount
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free_blocks1=$(stat -f $testdir -c '%f')
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echo "Rewrite some of the blocks"
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_pwrite_byte 0x62 0 $sz $testdir/file2 >> $seqres.full
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_pwrite_byte 0x63 0 $((sz / 2)) $testdir/file3 >> $seqres.full
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_pwrite_byte 0x64 $((sz / 2)) $((sz / 2)) $testdir/file4 >> $seqres.full
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_test_remount
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free_blocks2=$(stat -f $testdir -c '%f')
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echo "Rewrite all the files"
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_pwrite_byte 0x62 0 $sz $testdir/file2 >> $seqres.full
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_pwrite_byte 0x63 0 $sz $testdir/file3 >> $seqres.full
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_pwrite_byte 0x64 0 $sz $testdir/file4 >> $seqres.full
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_test_remount
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free_blocks3=$(stat -f $testdir -c '%f')
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echo "Rewrite the original file"
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_pwrite_byte 0x65 0 $sz $testdir/file1 >> $seqres.full
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_test_remount
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free_blocks4=$(stat -f $testdir -c '%f')
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#echo $free_blocks0 $free_blocks1 $free_blocks2 $free_blocks3 $free_blocks4
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_within_tolerance "free blocks after reflinking" $free_blocks1 $((free_blocks0 - blks)) $margin -v
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_within_tolerance "free blocks after partially CoWing some copies" $free_blocks2 $((free_blocks1 - (2 * blks))) $margin -v
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_within_tolerance "free blocks after CoWing all copies" $free_blocks3 $((free_blocks2 - blks)) $margin -v
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_within_tolerance "free blocks after overwriting original" $free_blocks4 $free_blocks3 $margin -v
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_within_tolerance "free blocks after all tests" $free_blocks4 $((free_blocks0 - (4 * blks))) $margin -v
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# success, all done
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status=0
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exit
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