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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved.
#
# FS QA Test No. 337
#
# Corrupt the realtime rmapbt and see how the kernel and xfs_repair deal.
#
. ./common/preamble
_begin_fstest fuzzers rmap realtime prealloc
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs xfs
_require_realtime
_require_xfs_scratch_rmapbt
_require_test_program "punch-alternating"
_require_xfs_io_command "falloc"
_disable_dmesg_check
rm -f "$seqres.full"
echo "+ create scratch fs"
_scratch_mkfs | _filter_mkfs 2>$tmp.mkfs >/dev/null
. $tmp.mkfs
cat $tmp.mkfs > "$seqres.full" 2>&1
echo "+ mount fs image"
_scratch_mount
blksz="$(_get_block_size $SCRATCH_MNT)"
# inode core size is at least 176 bytes; btree header is 56 bytes;
# rtrmap record is 32 bytes; and rtrmap key/pointer are 56 bytes.
i_core_size="$(_xfs_get_inode_core_bytes $SCRATCH_MNT)"
i_ptrs=$(( (isize - i_core_size) / 56 ))
bt_ptrs=$(( (blksz - 56) / 56 ))
bt_recs=$(( (blksz - 56) / 32 ))
blocks=$((i_ptrs * bt_ptrs * bt_recs + 1))
_require_fs_space $SCRATCH_MNT $(( (2 * blocks * blksz) * 5 / 4096 ))
len=$((blocks * blksz))
echo "+ make some files"
$XFS_IO_PROG -f -R -c "falloc 0 $len" -c "pwrite -S 0x68 -b 1048576 0 $len" $SCRATCH_MNT/f1 >> $seqres.full
$XFS_IO_PROG -f -R -c "falloc 0 $len" -c "pwrite -S 0x68 -b 1048576 0 $len" $SCRATCH_MNT/f2 >> $seqres.full
$here/src/punch-alternating $SCRATCH_MNT/f1 >> "$seqres.full"
$here/src/punch-alternating $SCRATCH_MNT/f2 >> "$seqres.full"
_scratch_unmount
echo "+ check fs"
_scratch_xfs_repair -n >> $seqres.full 2>&1 || echo "xfs_repair should not fail"
echo "+ corrupt image"
_scratch_xfs_db -x -c "sb" -c "addr rrmapino" -c "addr u3.rtrmapbt.ptrs[1]" \
-c "stack" -c "blocktrash -x 4096 -y 4096 -n 8 -3 -z" \
>> $seqres.full 2>&1
echo "+ mount image && copy more"
if _try_scratch_mount >> $seqres.full 2>&1; then
$XFS_IO_PROG -f -R -c "pwrite -S 0x68 0 1" $SCRATCH_MNT/e3 >> $seqres.full 2>&1
test -s ${SCRATCH_MNT}/f3 && echo "should not be able to copy with busted rtrmap btree"
_scratch_unmount
fi
echo "+ repair fs"
_repair_scratch_fs >> $seqres.full 2>&1
echo "+ mount image (2)"
_scratch_mount
echo "+ copy more (2)"
$XFS_IO_PROG -f -R -c "pwrite -S 0x68 0 1" $SCRATCH_MNT/e4 >> $seqres.full
# success, all done
status=0
exit
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