mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Robbie Ko
23e7ba4e10
Found it when test btrfs delalloc accounting overflow, Fix offset error. We will fill in the gaps between the created extents, then outstanding extents will all be merged into 1. Signed-off-by: Robbie Ko <robbieko@synology.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
76 lines
2.1 KiB
Bash
Executable File
76 lines
2.1 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test 10
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#
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# Test delayed allocation with a large number of extents that are merged.
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# Regression test for patch "Btrfs: fix delalloc accounting leak caused
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# by u32 overflow".
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2017 Facebook. 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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test_file="$TEST_DIR/$seq"
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_cleanup()
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{
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cd /
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rm -f $tmp.* "$test_file"
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}
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. ./common/rc
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. ./common/filter
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rm -f $seqres.full
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_supported_fs btrfs
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_supported_os Linux
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_require_test
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# Create 32k extents. All of these extents will be accounted as outstanding and
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# reserved.
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for ((i = 0; i < 32 * 1024; i++)); do
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$XFS_IO_PROG -f -c "pwrite $((2 * 4096 * i)) 4096" "$test_file" >>"$seqres.full"
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done
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# Fill in the gaps between the created extents. The outstanding extents will
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# all be merged into 1, but there will still be 32k reserved.
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for ((i = 0; i < 32 * 1024; i++)); do
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$XFS_IO_PROG -f -c "pwrite $((2 * 4096 * i + 4096)) 4096" "$test_file" >>"$seqres.full"
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done
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# Flush the delayed allocations.
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sync
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# Make sure that we didn't leak any metadata space.
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uuid="$(findmnt -n -o UUID "$TEST_DIR")"
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cd "/sys/fs/btrfs/$uuid/allocation"
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echo "$(($(cat metadata/bytes_may_use) - $(cat global_rsv_reserved))) bytes leaked" | grep -v '^0 '
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echo "Silence is golden"
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status=0
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exit
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