tests/generic/688

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2022 Oracle.  All Rights Reserved.
#
# FS QA Test No. 688
#
# Functional test for dropping capability bits as part of an fallocate.
#
. ./common/preamble
_begin_fstest auto prealloc quick

# Override the default cleanup function.
_cleanup()
{
	cd /
	rm -r -f $tmp.* $junk_dir
}

# Import common functions.
. ./common/filter
. ./common/attr


# Modify as appropriate.
_require_user
_require_command "$GETCAP_PROG" getcap
_require_command "$SETCAP_PROG" setcap
_require_xfs_io_command falloc
_require_test
_require_congruent_file_oplen $TEST_DIR 65536
_require_attrs security

junk_dir=$TEST_DIR/$seq
junk_file=$junk_dir/a
mkdir -p $junk_dir/
chmod a+rw $junk_dir/

setup_testfile() {
	rm -f $junk_file
	touch $junk_file
	chmod a+rwx $junk_file
	$SETCAP_PROG cap_setgid,cap_setuid+ep $junk_file
	_test_sync
}

commit_and_check() {
	local user="$1"

	stat -c '%a %A %n' $junk_file | _filter_test_dir
	_getcap -v $junk_file | _filter_test_dir

	local cmd="$XFS_IO_PROG -c 'falloc 0 64k' $junk_file"
	if [ -n "$user" ]; then
		_su - "$user" -c "$cmd" >> $seqres.full
	else
		$SHELL -c "$cmd" >> $seqres.full
	fi

	stat -c '%a %A %n' $junk_file | _filter_test_dir
	_getcap -v $junk_file | _filter_test_dir

	# Blank line in output
	echo
}

# Commit by an unprivileged user clears capability bits.
echo "Test 1 - qa_user"
setup_testfile
commit_and_check "$qa_user"

# Commit by root leaves capability bits.
echo "Test 2 - root"
setup_testfile
commit_and_check

# success, all done
status=0
exit