mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
42d6e34f3f
Fix the unwritten extent detector in this test to ignore post-eof allocations because those are harmless. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
100 lines
2.1 KiB
Bash
Executable File
100 lines
2.1 KiB
Bash
Executable File
#! /bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
# Copyright (c) 2014 Red Hat, Inc. All Rights Reserved.
|
|
#
|
|
# FS QA Test No. 032
|
|
#
|
|
# This test implements a data corruption scenario on XFS filesystems with
|
|
# sub-page sized blocks and unwritten extents. Inode lock contention during
|
|
# writeback of pages to unwritten extents leads to failure to convert those
|
|
# extents on I/O completion. This causes data corruption as unwritten extents
|
|
# are always read back as zeroes.
|
|
#
|
|
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
|
|
|
|
_cleanup()
|
|
{
|
|
cd /
|
|
kill -9 $syncpid > /dev/null 2>&1
|
|
wait
|
|
rm -f $tmp.*
|
|
}
|
|
|
|
# get standard environment, filters and checks
|
|
. ./common/rc
|
|
. ./common/punch
|
|
|
|
# real QA test starts here
|
|
rm -f $seqres.full
|
|
|
|
_syncloop()
|
|
{
|
|
while [ true ]; do
|
|
sync
|
|
done
|
|
}
|
|
|
|
# Modify as appropriate.
|
|
_supported_fs generic
|
|
_supported_os Linux
|
|
_require_scratch
|
|
_require_xfs_io_command "falloc"
|
|
_require_xfs_io_command "fiemap"
|
|
|
|
_scratch_mkfs >/dev/null 2>&1
|
|
_scratch_mount
|
|
|
|
# run background sync thread
|
|
_syncloop &
|
|
syncpid=$!
|
|
|
|
for iters in $(seq 1 100)
|
|
do
|
|
rm -f $SCRATCH_MNT/file
|
|
|
|
# create a delalloc block in each page of the first 64k of the file
|
|
for pgoff in $(seq 0 0x1000 0xf000); do
|
|
offset=$((pgoff + 0xc00))
|
|
$XFS_IO_PROG -f \
|
|
-c "pwrite $offset 0x1" \
|
|
$SCRATCH_MNT/file >> $seqres.full 2>&1
|
|
done
|
|
|
|
# preallocate the first 64k and overwite, writing past 64k to contend
|
|
# with writeback
|
|
file_len=0x100000
|
|
$XFS_IO_PROG \
|
|
-c "falloc 0 0x10000" \
|
|
-c "pwrite 0 $file_len" \
|
|
-c "fsync" \
|
|
$SCRATCH_MNT/file >> $seqres.full 2>&1
|
|
|
|
# Check for unwritten extents. We should have none before EOF since we
|
|
# wrote over the entire preallocated region and ran fsync.
|
|
eof_sector=$(( file_len / 512 ))
|
|
$XFS_IO_PROG -c 'fiemap -v' $SCRATCH_MNT/file | \
|
|
_filter_fiemap | \
|
|
tr '[.]:' ' ' | \
|
|
awk "{if (\$2 < $eof_sector) {print \$0}}" | \
|
|
grep -q unwritten && _fail "Unwritten extents found!"
|
|
done
|
|
|
|
echo $iters iterations
|
|
|
|
kill $syncpid
|
|
wait
|
|
|
|
# clear page cache and dump the file
|
|
_scratch_cycle_mount
|
|
hexdump $SCRATCH_MNT/file
|
|
|
|
status=0
|
|
exit
|