mirror of
https://github.com/linux-apfs/apfstests.git
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Dave Chinner
1ff4192932
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
110 lines
2.7 KiB
Bash
Executable File
110 lines
2.7 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2014 Fujitsu All Rights Reserved.
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#
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# FS QA Test No. btrfs/079
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#
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# Do write along with fiemap ioctl.
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# Regression test for the kernel comit:
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# 51f395ad btrfs: Use right extent length when inserting overlap extent map.
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#
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# When calling fiemap(without SYNC flag) and btrfs fs is commiting,
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# it will cause race condition and cause btrfs to generate a wrong extent
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# whose len is overflow and fail to insert into the extent map tree,
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# returning -EEXIST.
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#
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# Fixed by the following patches (not merged in mainline yet):
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# btrfs: Fix and enhance merge_extent_mapping() to insert best fitted extent map
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# btrfs: Fix the wrong condition judgment about subset extent map
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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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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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kill $dd_pid &> /dev/null
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kill $fiemap_pid &> /dev/null
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wait
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rm -fr $testfile
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rm -fr $tmp.* $tmp
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch
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# Since xfs_io's fiemap always use SYNC flag and can't be unset,
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# we must use filefrag to call fiemap without SYNC flag.
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_require_command "$FILEFRAG_PROG" filefrag
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_require_xfs_io_command "falloc"
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filesize=$((10 * 1024 * 1024 * 1024)) #10G size
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buffersize=$((1024 * 1024)) # 1M bs for dd
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count=$(($filesize / $buffersize))
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testfile=$SCRATCH_MNT/testfile
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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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_require_fs_space $SCRATCH_MNT $(($filesize / 1024))
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$XFS_IO_PROG -f -c "falloc 0 $filesize" $testfile
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dd_work() {
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out=$1
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dd if=/dev/zero of=$out bs=$buffersize count=$count \
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conv=notrunc &> /dev/null
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}
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# There is a bug for e2fsprogs, at least in version 1.42.9, filefrag will
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# leak the return value, so we can't judge return value only,
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# but also to filter the output
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_filter_error() {
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# when filefrag fails FIEMAP ioctl, it will fall back to FIBMAP,
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# which is not supported by btrfs and will report "FIBMAP: strerr()"
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# However old e2fsprogs will use wrong errno EINVAL other than ENOTTY
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# so only grep for "FIBMAP" for max compatibility.
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grep "FIBMAP"
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}
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fiemap_work() {
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filename=$1
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while true; do
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$FILEFRAG_PROG $filename 2> $tmp.output 1> /dev/null
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ret=$?
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err=`cat $tmp.output | _filter_error`
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if [ $ret -ne 0 -o -n "$err" ]; then
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kill $dd_pid
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return 1
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fi
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done
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}
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dd_work $testfile &
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dd_pid=$!
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fiemap_work $testfile &
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fiemap_pid=$!
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wait $dd_pid
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ddret=$?
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kill $fiemap_pid &> /dev/null
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wait $fiemap_pid
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if [ $ddret -ne 0 ]; then
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echo "Extent merge bug detected"
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status=1
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exit
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else
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echo "Silence is golden"
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status=0
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exit
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fi
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