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https://github.com/linux-apfs/apfstests.git
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Darrick J. Wong
bed1fedae6
Check that the free block counts seem to be handled correctly in the reflink operation and subsequent attempts to rewrite reflinked copies. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
115 lines
3.6 KiB
Bash
Executable File
115 lines
3.6 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 155
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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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# The main difference from 834 is that we use zero range, directio, and
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# mmap to mix things up a bit.
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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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_require_xfs_io_command "fzero"
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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 "$TESTDIR" -c '%S')"
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BLKS=2000
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MARGIN=100
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SZ=$((BLKSZ * BLKS))
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FREE_BLOCKS0=$(stat -f "$TESTDIR" -c '%f')
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NR=4
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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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"$XFS_IO_PROG" -f -c "fzero 0 $SZ" "$TESTDIR/file2" >> "$seqres.full"
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_pwrite_byte 0x63 0 $((SZ / 2)) "$TESTDIR/file3" -d >> "$seqres.full"
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_mwrite_byte 0x64 $((SZ / 2)) $((SZ / 2)) $SZ "$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" -d >> "$seqres.full"
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_mwrite_byte 0x63 0 $SZ $SZ "$TESTDIR/file3" >> "$seqres.full"
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"$XFS_IO_PROG" -f -c "fzero 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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