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Darrick J. Wong
c8a13e5303
These tests examine the behavior of advanced and tricky copy on write situations. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
126 lines
3.9 KiB
Bash
Executable File
126 lines
3.9 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 200
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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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# - 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) 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_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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rm -rf $TESTDIR
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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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_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
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$XFS_IO_PROG -f -c "truncate $((BLKSZ * NR))" "$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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sync
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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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sync
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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" >> "$seqres.full"
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done
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sync
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_scratch_remount
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echo "Compare files"
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md5sum "$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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echo "directio CoW across the transition"
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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" >> "$seqres.full"
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done
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# now cow
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"$XFS_IO_PROG" -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
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_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$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 "$TESTDIR/file3" | _filter_scratch
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md5sum "$TESTDIR/file3.chk" | _filter_scratch
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echo "Check for damage"
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umount "$SCRATCH_MNT"
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_check_scratch_fs
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# success, all done
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status=0
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exit
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