mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
c74b4cb7b0
Make sure that xfs_getbmapx behaves properly w.r.t. shared extents and CoW fork reporting. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
166 lines
5.5 KiB
Bash
Executable File
166 lines
5.5 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 243
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#
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# Ensuring that copy on write in buffered mode works when the CoW
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# range originally covers multiple extents, some unwritten, some not.
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# - Set cowextsize hint.
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# - Create a file with the following repeating sequence of blocks:
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# 1. reflinked
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# 2. unwritten
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# 3. hole
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# 4. regular block
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# 5. delalloc
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# - CoW across the halfway mark, starting with the unwritten extent.
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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) 2016, 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.*
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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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_supported_fs xfs
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_require_scratch_reflink
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_require_xfs_io_command "falloc"
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_require_xfs_io_command "fpunch"
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_require_cp_reflink
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rm -f $seqres.full
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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 $testdir
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echo "Create the original files"
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blksz=65536
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nr=64
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filesize=$((blksz * nr))
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$XFS_IO_PROG -c "cowextsize $((blksz * 16))" $testdir >> $seqres.full
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_pwrite_byte 0x61 0 $filesize $testdir/file1 >> $seqres.full
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$XFS_IO_PROG -f -c "truncate $filesize" $testdir/file3 >> $seqres.full
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# 0 blocks are reflinked
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seq 0 5 $nr | 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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# 1 blocks are unwritten
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seq 1 5 $nr | while read f; do
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$XFS_IO_PROG -f -c "falloc $((blksz * f)) $blksz" $testdir/file3 >> $seqres.full
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_pwrite_byte 0x00 $((blksz * f)) $blksz $testdir/file3.chk >> $seqres.full
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done
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# 2 blocks are holes
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seq 2 5 $nr | while read f; do
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_pwrite_byte 0x00 $((blksz * f)) $blksz $testdir/file3.chk >> $seqres.full
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done
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# 3 blocks are regular
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seq 3 5 $nr | while read f; do
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_pwrite_byte 0x71 $((blksz * f)) $blksz $testdir/file3 >> $seqres.full
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_pwrite_byte 0x71 $((blksz * f)) $blksz $testdir/file3.chk >> $seqres.full
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done
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sync
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# 4 blocks are delalloc (do later)
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seq 4 5 $nr | while read f; do
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_pwrite_byte 0x62 $((blksz * f)) $blksz $testdir/file3 >> $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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# 10 blocks are cow'd
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seq 0 10 $((nr/2)) | while read f; do
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_pwrite_byte 0x61 $((blksz * f)) 1 $testdir/file3 >> $seqres.full
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_pwrite_byte 0x61 $((blksz * f)) 1 $testdir/file3.chk >> $seqres.full
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done
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echo "Compare files"
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md5sum $testdir/file1 | _filter_scratch
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md5sum $testdir/file3 | _filter_scratch
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md5sum $testdir/file3.chk | _filter_scratch
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echo "Dump extents"
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$XFS_IO_PROG -c "cowextsize" $testdir/file3 | _filter_scratch
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echo "Delayed allocation CoW extents:"
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test $(_xfs_bmapx_find cow $testdir/file3 delalloc) -gt 0 || \
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echo "Expected to find a delalloc CoW extent"
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echo "Shared data extents:"
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test $(_xfs_bmapx_find data $testdir/file3 '100000$') -gt 0 || \
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echo "Expected to find a shared data extent"
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echo "Unwritten data extents:"
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test $(_xfs_bmapx_find data $testdir/file3 '10000$') -gt 0 || \
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echo "Expected to find an unwritten data extent"
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echo "Hole data extents:"
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test $(_xfs_bmapx_find data $testdir/file3 hole) -gt 0 || \
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echo "Expected to find a hole data extent"
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echo "Regular data extents:"
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test $(_xfs_bmapx_find data $testdir/file3 '000000$') -gt 0 || \
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echo "Expected to find a regular data extent"
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sync
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echo "Dump extents after sync"
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$XFS_IO_PROG -c "cowextsize" $testdir/file3 | _filter_scratch
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echo "Delayed allocation CoW extents:"
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test $(_xfs_bmapx_find cow $testdir/file3 -v hole ) -gt 0 || \
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echo "Expected to find a regular CoW extent"
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echo "Real CoW extents:"
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test $(_xfs_bmapx_find cow $testdir/file3 delalloc ) -eq 0 || \
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echo "Expected to find zero delalloc CoW extent"
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echo "Shared data extents:"
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test $(_xfs_bmapx_find data $testdir/file3 '100000$') -gt 0 || \
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echo "Expected to find a shared data extent"
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echo "Unwritten data extents:"
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test $(_xfs_bmapx_find data $testdir/file3 '10000$') -gt 0 || \
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echo "Expected to find an unwritten data extent"
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echo "Hole data extents:"
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test $(_xfs_bmapx_find data $testdir/file3 hole) -gt 0 || \
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echo "Expected to find a hole data extent"
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echo "Regular data extents:"
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test $(_xfs_bmapx_find data $testdir/file3 '000000$') -gt 0 || \
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echo "Expected to find a regular data extent"
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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/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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