#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2016 CTERA Networks. All Rights Reserved.
#
# FSQA Test No. 348
#
# Test handling of invalid inode modes
#
# Set all possible file type values for different types of files
# and verify that xfs_repair detects the correct errors.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

tmp=/tmp/$$
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	rm -f $tmp.*
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter
. ./common/repair

# real QA test starts here
_supported_fs xfs
_supported_os Linux
_require_scratch

# This test will corrupt fs intentionally, so there will be WARNINGs
# in dmesg as expected
_disable_dmesg_check

rm -f $seqres.full

_scratch_mkfs >>$seqres.full 2>&1

_scratch_mount

# Create our test files.
testdir=$SCRATCH_MNT/test
mkdir -p $testdir
mkdir $testdir/DIR
echo 123 > $testdir/DATA
touch $testdir/EMPTY
ln -s $testdir/DATA $testdir/SYMLINK
mknod $testdir/CHRDEV c 1 1
mknod $testdir/BLKDEV b 1 1
mknod $testdir/FIFO p

$XFS_INFO_PROG $SCRATCH_MNT | grep -q "ftype=1" && FTYPE_FEATURE=1

# Record test dir inode for xfs_repair filter
inode_filter=$tmp.sed
rm -f $inode_filter
pino=$(ls -id $testdir | awk '{print $1}')
echo "s/inode $pino/PARENT_INO/" >> $inode_filter
echo "s/directory $pino/directory PARENT_INO/" >> $inode_filter

inodes=""
# Record inode numbers for xfs_db commands and xfs_repair filter
for f in DIR DATA EMPTY SYMLINK CHRDEV BLKDEV FIFO; do
	ino=$(ls -id $testdir/$f | awk '{print $1}')
	inodes="$inodes $ino"
	echo "s/inode $ino/${f}_INO/" >> $inode_filter
done

_scratch_unmount

# Possible mode file type values (mode & S_IFMT) >> 12
dtypes="0 1 2 3 4 5 6 7 10 11 12 13 14 15 16 17"
echo "===== Find inode by file type:"
for dt in $dtypes; do
	# Set all our test files to dt value
	for ino in $inodes; do
		_scratch_xfs_db -c "inode $ino" -c "print core.mode" | \
			grep -q "0${dt}0...$" && \
			(echo "dt=$dt => inode $ino" | sed -f $inode_filter)
	done
done
for dt in $dtypes; do
	echo
	echo "===== Setting dt=$dt to all files:"
	# Set all our test files to dt value
	for ino in $inodes; do
		_scratch_xfs_db -x -c "inode $ino" -c "write core.mode 0${dt}0644"
	done
	# Repair should detect the inconsistencies
	# For invalid dt values, all files would have been junked.
	# For valid dt values, one test file is expected to be valid.
	# The rest would either have wrong format or non matching dir ftype.
	_scratch_xfs_repair -n 2>&1  | tee -a $seqres.full | \
		_filter_repair | grep "^would have junked" | sed -f $inode_filter | sort -u
	# If ftype feature is enabled, when setting file type to one of the
	# special types (i.e. FIFO(1), CHRDEV(2),BLKDEV(6),SOCKET(14)),
	# xfs_repair is expected to detect ftype mismatch error. Otherewise,
	# xfs_repair is not expected to detect ftype mismatch error.
	if [ "$FTYPE_FEATURE" = 1 ] && (echo ':1:2:6:14:' | grep -q ":$dt:"); then
		_scratch_xfs_repair -n 2>&1 | grep -q "^would fix ftype mismatch" || \
			echo "xfs_repair should fix ftype mismatch"
	else
		_scratch_xfs_repair -n 2>&1 | grep -q -v "^would fix ftype mismatch" || \
			echo "xfs_repair should not fix ftype mismatch"
	fi

	_scratch_mount
	for file in DIR DATA EMPTY SYMLINK CHRDEV BLKDEV FIFO; do
		rm -f $tmp.stat.err
		ftype=$(stat --printf=%F $testdir/$file 2>$tmp.stat.err)
		if [ -s $tmp.stat.err ]; then
			cat $tmp.stat.err
		else
			echo "stat: '$testdir/$file' is a $ftype"
			# Verify that readlink of a file posing as a symlink
			# and ls of a file posing as a directory does not blow up.
			# NOTE that ls DOES ASSERT with kernel 4.9 and XFS_DEBUG=y
			# on malformed directory
			if [ -d $testdir/$file ]; then
				ls $testdir/$file &> /dev/null
			elif [ -h $testdir/$file ]; then
				readlink $testdir/$file &> /dev/null
			fi
		fi | _filter_scratch
	done
	_scratch_unmount
done

# Repair should detect and junk all test files
_scratch_xfs_repair 2>&1 >> $seqres.full 2>&1 || _fail "xfs_repair should not fail"

status=0
exit