mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Christoph Hellwig
911efb0897
NFS uses 32K blocks and thus the numbers used for sanity checking various reflink operations are way off. Change to relative margings and increase them a bit to make NFS happy. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
125 lines
3.7 KiB
Bash
Executable File
125 lines
3.7 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 156
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#
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# Ensure that fallocate on reflinked files actually CoWs the shared blocks.
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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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# - funshare half of one of the copies
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# - Record fs block usage (2)
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# - funshare all of the copies
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# - Record fs block usage (3)
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# - rewrite the original file
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# - Record fs block usage (4)
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# - Compare fs block usage of 0-4 to ensure that block usage behaves as
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# we expect.
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#
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# "funshare" refers to fallocate copy-on-writing the shared blocks
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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/attr
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. ./common/reflink
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if [ $FSTYP = "btrfs" ]; then
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_notrun "btrfs doesn't handle unshare on fallocate"
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fi
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# real QA test starts here
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_supported_os Linux
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_require_test_reflink
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_require_cp_reflink
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_require_xfs_io_command "falloc"
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rm -f "$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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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 "funshare part of a file"
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"$XFS_IO_PROG" -f -c "falloc 0 $((sz / 2))" "$testdir/file2"
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_test_remount
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echo "funshare some of the copies"
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"$XFS_IO_PROG" -f -c "falloc 0 $sz" "$testdir/file2"
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"$XFS_IO_PROG" -f -c "falloc 0 $sz" "$testdir/file3"
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_test_remount
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free_blocks2=$(stat -f "$testdir" -c '%f')
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echo "funshare the rest of the files"
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"$XFS_IO_PROG" -f -c "falloc 0 $sz" "$testdir/file4"
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"$XFS_IO_PROG" -f -c "falloc 0 $sz" "$testdir/file1"
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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 nocow'ing some copies" $free_blocks2 $((free_blocks1 - (2 * blks))) $margin -v
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_within_tolerance "free blocks after nocow'ing 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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