mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Qu Wenruo
08a516f979
Even the fallocate range doesn't cover the last page of a file, btrfs will still re-truncate the last page. Such behavior is completely duplicated and unneeded, and fixed by the following kernel patch: btrfs: Avoid truncate tailing page if fallocate range doesn't exceed inode size Add this test case to check that malfunction. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
84 lines
2.3 KiB
Bash
Executable File
84 lines
2.3 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test 107
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#
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# Test that calling fallocate against a range which is already
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# allocated does not truncate beyond EOF
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2015 Fujitsu. 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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#
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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 -f $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/defrag
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch
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_need_to_be_root
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# Use 64K file size to match any sectorsize
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# And with a unaligned tailing range to ensure it will be at least 2 pages
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filesize=$(( 64 * 1024 + 1024 ))
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# Fallocate a range that will not cover the tailing page
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fallocrange=$(( 64 * 1024 ))
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_scratch_mkfs > /dev/null 2>&1
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_scratch_mount
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$XFS_IO_PROG -f -c "pwrite 0 $filesize" $SCRATCH_MNT/foo | _filter_xfs_io
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sync
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orig_extent_nr=`_extent_count $SCRATCH_MNT/foo`
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# As all space are allocated and even written to disk, this falloc
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# should do nothing with extent modification.
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$XFS_IO_PROG -f -c "falloc 0 $fallocrange" $SCRATCH_MNT/foo
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sync
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new_extent_nr=`_extent_count $SCRATCH_MNT/foo`
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echo "orig: $orig_extent_nr, new: $new_extent_nr" >> $seqres.full
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if [ "x$orig_extent_nr" != "x$new_extent_nr" ]; then
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echo "Extent beyond EOF is re-truncated"
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echo "orig_extent_nr: $orig_extent_nr new_extent_nr: $new_extent_nr"
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fi
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# success, all done
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status=0
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exit
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