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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015 Oracle, Inc. All Rights Reserved.
#
# FS QA Test No. 009
#
# Create and populate an ext4 filesystem, corrupt a block bitmap, then
# see how the kernel and e2fsck deal with it.
#
. ./common/preamble
_begin_fstest fuzzers prealloc
# Override the default cleanup function.
_cleanup()
{
cd /
#rm -f $tmp.*
}
# Import common functions.
. ./common/filter
. ./common/attr
# real QA test starts here
_supported_fs ext4
_require_xfs_io_command "falloc"
_require_scratch
test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
_require_attrs
TESTDIR="${SCRATCH_MNT}/scratchdir"
TESTFILE="${TESTDIR}/testfile"
echo "+ create scratch fs"
_scratch_mkfs_ext4 > /dev/null 2>&1
dumpe2fs -g "${SCRATCH_DEV}" > /dev/null 2>&1 || _notrun "dumpe2fs -g not supported"
nr_groups="$(dumpe2fs -g "${SCRATCH_DEV}" 2> /dev/null | tail -n 1 | cut -d : -f 1)"
echo "+ mount fs image"
_scratch_mount
# abuse orlov allocator in the hopes that each bg ends up with some inodes
for i in `seq 1 $((nr_groups * 8))`; do
mkdir -p "${SCRATCH_MNT}/d_${i}"
done
blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")"
freeblks="$(stat -f -c '%a' "${SCRATCH_MNT}")"
$XFS_IO_PROG -f -c "falloc 0 $((blksz * freeblks))" "${SCRATCH_MNT}/bigfile2" >> $seqres.full
umount "${SCRATCH_MNT}"
echo "+ make some files"
_scratch_mount
rm -rf "${SCRATCH_MNT}/bigfile2"
touch "${SCRATCH_MNT}/bigfile"
umount "${SCRATCH_MNT}"
echo "+ check fs"
e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
echo "+ corrupt image"
dumpe2fs -g "${SCRATCH_DEV}" 2>/dev/null | awk -F ':' '{if (int($5) > 0) {print $5}}' | while read blk; do
debugfs -w -n -R "zap_block -p 0xff ${blk}" "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "block bitmap fuzz failed"
done
echo "+ mount image"
_scratch_mount
echo "+ modify files"
b_bytes="$(stat -c '%B' "${SCRATCH_MNT}/bigfile")"
$XFS_IO_PROG -f -c "falloc 0 $((blksz * freeblks))" "${SCRATCH_MNT}/bigfile" >> $seqres.full 2> /dev/null
after="$(stat -c '%b' "${SCRATCH_MNT}/bigfile")"
echo "$((after * b_bytes))" lt "$((blksz * freeblks / 4))" >> $seqres.full
test "$((after * b_bytes))" -lt "$((blksz * freeblks / 4))" || _fail "falloc should fail"
umount "${SCRATCH_MNT}"
echo "+ repair fs"
e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
echo "+ mount image (2)"
_scratch_mount
echo "+ modify files (2)"
$XFS_IO_PROG -f -c "falloc 0 $((blksz * freeblks))" "${SCRATCH_MNT}/bigfile" >> $seqres.full
umount "${SCRATCH_MNT}"
echo "+ check fs (2)"
e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
status=0
exit
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