mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Omar Sandoval
ff1f614f33
This is a regression test for patch "Btrfs: fix delalloc accounting leak caused by u32 overflow". It creates a bunch of delalloc extents and merges them together to make sure the accounting is done right. [eguan: use $XFS_IO_PROG instead of xfs_io] Signed-off-by: Omar Sandoval <osandov@fb.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
|
|
# FS QA Test 10
|
|
#
|
|
# Test delayed allocation with a large number of extents that are merged.
|
|
# Regression test for patch "Btrfs: fix delalloc accounting leak caused
|
|
# by u32 overflow".
|
|
#
|
|
#-----------------------------------------------------------------------
|
|
# Copyright (c) 2017 Facebook. All Rights Reserved.
|
|
#
|
|
# This program is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU General Public License as
|
|
# published by the Free Software Foundation.
|
|
#
|
|
# This program is distributed in the hope that it would be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write the Free Software Foundation,
|
|
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
#-----------------------------------------------------------------------
|
|
#
|
|
|
|
seq=`basename $0`
|
|
seqres=$RESULT_DIR/$seq
|
|
echo "QA output created by $seq"
|
|
|
|
here=`pwd`
|
|
tmp=/tmp/$$
|
|
status=1 # failure is the default!
|
|
trap "_cleanup; exit \$status" 0 1 2 3 15
|
|
|
|
test_file="$TEST_DIR/$seq"
|
|
|
|
_cleanup()
|
|
{
|
|
cd /
|
|
rm -f $tmp.* "$test_file"
|
|
}
|
|
|
|
. ./common/rc
|
|
. ./common/filter
|
|
|
|
rm -f $seqres.full
|
|
|
|
_supported_fs btrfs
|
|
_supported_os Linux
|
|
_require_test
|
|
|
|
# Create 32k extents. All of these extents will be accounted as outstanding and
|
|
# reserved.
|
|
for ((i = 0; i < 32 * 1024; i++)); do
|
|
$XFS_IO_PROG -f -c "pwrite $((2 * 4096 * i)) 4096" "$test_file" >>"$seqres.full"
|
|
done
|
|
|
|
# Fill in the gaps between the created extents. The outstanding extents will
|
|
# all be merged into 1, but there will still be 32k reserved.
|
|
for ((i = 0; i < 32 * 1024; i++)); do
|
|
$XFS_IO_PROG -f -c "pwrite $((2 * 4096 * i + 1)) 4096" "$test_file" >>"$seqres.full"
|
|
done
|
|
|
|
# Flush the delayed allocations.
|
|
sync
|
|
|
|
# Make sure that we didn't leak any metadata space.
|
|
uuid="$(findmnt -n -o UUID "$TEST_DIR")"
|
|
cd "/sys/fs/btrfs/$uuid/allocation"
|
|
echo "$(($(cat metadata/bytes_may_use) - $(cat global_rsv_reserved))) bytes leaked" | grep -v '^0 '
|
|
|
|
echo "Silence is golden"
|
|
|
|
status=0
|
|
exit
|