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>
146 lines
4.4 KiB
Bash
Executable File
146 lines
4.4 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 186
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#
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# Ensuring that copy on write in buffered mode works when free space
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# is heavily fragmented.
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# - Create two files
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# - Reflink the odd blocks of the first file into a third file.
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# - Reflink the even blocks of the second file into the third file.
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# - Try to fragment the free space by allocating a huge file and
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# punching out every other block.
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# - CoW across the halfway mark.
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# - Check that the files are now different where we say they're different.
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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_scratch_reflink
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_require_cp_reflink
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_require_xfs_io_command "falloc"
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_require_xfs_io_command "fpunch"
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test $FSTYP = "btrfs" && _notrun "Can't fragment free space on btrfs."
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rm -f $seqres.full
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_fragment_freesp()
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{
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file=$1
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# consume nearly all available space (leave ~1MB)
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avail=`_get_available_space $SCRATCH_MNT`
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echo "$avail bytes left"
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filesize=$((avail - 1048576))
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$XFS_IO_PROG -fc "truncate $filesize" $file
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chunks=20
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chunksizemb=$((filesize / chunks / 1048576))
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seq 1 $chunks | while read f; do
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echo "$((f * chunksizemb)) file size $f / 20"
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$XFS_IO_PROG -fc "falloc -k $(( (f - 1) * chunksizemb))m ${chunksizemb}m" $file
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done
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chunks=100
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chunksizemb=$((filesize / chunks / 1048576))
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seq 80 $chunks | while read f; do
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echo "$((f * chunksizemb)) file size $f / $chunks"
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$XFS_IO_PROG -fc "falloc -k $(( (f - 1) * chunksizemb))m ${chunksizemb}m" $file
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done
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filesizemb=$((filesize / 1048576))
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$XFS_IO_PROG -fc "falloc -k 0 ${filesizemb}m" $file
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# Try again anyway
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avail=`_get_available_space $SCRATCH_MNT`
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$XFS_IO_PROG -fc "pwrite -S 0x65 0 $avail" ${file}.${i}
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# Punch out whatever we need
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seq 1 $((nr * 4)) | while read f; do
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$XFS_IO_PROG -f -c "fpunch $((f * 2 * blksz)) $blksz" $file
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done
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}
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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 $testdir
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echo "Create the original files"
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blksz=65536
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nr=1024
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filesize=$((blksz * nr))
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_pwrite_byte 0x61 0 $filesize $testdir/file1 >> $seqres.full
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_pwrite_byte 0x62 0 $filesize $testdir/file2 >> $seqres.full
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seq 0 2 $((nr-1)) | while read f; do
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_reflink_range $testdir/file1 $((blksz * f)) $testdir/file3 $((blksz * f)) $blksz >> $seqres.full
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_pwrite_byte 0x61 $((blksz * f)) $blksz $testdir/file3.chk >> $seqres.full
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done
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seq 1 2 $((nr-1)) | while read f; do
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_reflink_range $testdir/file2 $((blksz * f)) $testdir/file3 $((blksz * f)) $blksz >> $seqres.full
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_pwrite_byte 0x62 $((blksz * f)) $blksz $testdir/file3.chk >> $seqres.full
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done
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_scratch_remount
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_fragment_freesp $testdir/bigfile >> $seqres.full 2>&1
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filesize=$((blksz * nr))
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_scratch_remount
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echo "Compare files"
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md5sum $testdir/file1 | _filter_scratch
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md5sum $testdir/file2 | _filter_scratch
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md5sum $testdir/file3 | _filter_scratch
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md5sum $testdir/file3.chk | _filter_scratch
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echo "CoW with multiple extents?"
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cowoff=$((filesize / 4))
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cowsz=$((filesize / 2))
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$XFS_IO_PROG -f -c "pwrite -S 0x63 -b $cowsz $cowoff $cowsz" $testdir/file3 >> $seqres.full
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_pwrite_byte 0x63 $cowoff $cowsz $testdir/file3.chk >> $seqres.full
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_scratch_remount
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echo "Compare files"
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md5sum $testdir/file1 | _filter_scratch
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md5sum $testdir/file2 | _filter_scratch
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md5sum $testdir/file3 | _filter_scratch
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md5sum $testdir/file3.chk | _filter_scratch
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# success, all done
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status=0
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exit
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