#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
# Copyright (c) 2014 Red hat, Inc.  All Rights Reserved.
#
# FS QA Test No. generic/026
#
# Test out ACL count limits
#
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

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

_cleanup()
{
    cd /
    rm -f $tmp.*
    [ -n "$TEST_DIR" ] && rm -rf $TEST_DIR/$seq.dir1
}

# real QA test starts here
_supported_fs generic
_require_test
_acl_setup_ids
_require_acls
_require_acl_get_max

rm -f $seqres.full

# get dir
cd $TEST_DIR
rm -rf $seq.dir1
mkdir $seq.dir1
cd $seq.dir1

# we return E2BIG if hit the max acl limits on new kernel, but EINVAL
# on old kernel. So we need to filter out the error message in order
# to make the updated golden output works for both old and new kernels.
_filter_largeacl()
{
	sed -e "s/Invalid argument/Argument list too long/"
}

# filter all the non-ace stuff from the acl output so the count is
# correct. Note that this assumes that _create_n_aces always creates rwx acls.
_filter_acls()
{
	_filter_aces | grep ':rwx'
}

# store the output in seqres.full, then run again an count and filter the
# output.
check_acls()
{
	_acl=$1
	_count=$2

	chacl $_acl largeaclfile 2>&1 | _filter_largeacl
	getfacl --numeric largeaclfile | _filter_aces \
		>> $seqres.full 2> /dev/null
	nacls=`getfacl --numeric largeaclfile | _filter_acls | wc -l`
	if [ $nacls -ne $_count ]; then
		echo Wrong ACL count - $nacls != $_count
	fi
}


echo ""
echo "=== Test out large ACLs  ==="
touch largeaclfile

ACL_MAX_ENTRIES=$(_acl_get_max)
num_aces_pre=$((ACL_MAX_ENTRIES - 1))
num_aces_post=$((ACL_MAX_ENTRIES + 1))

acl1=`_create_n_aces $num_aces_pre`
acl2=`_create_n_aces $ACL_MAX_ENTRIES`
acl3=`_create_n_aces $num_aces_post`
acl4=`_create_n_aces 16` # Andreas G. libacl size for initial get
acl5=`_create_n_aces 17` # 1 over A.G. libacl initial size

echo "1 below acl max"
check_acls $acl1 $num_aces_pre

echo "acl max"
check_acls $acl2 $ACL_MAX_ENTRIES

# we expect the ACL change to fail, so the old ACLs should remain on the
# file. Hence the expected ACL count is XFS_ACL_MAX_ENTRIES, not num_aces_post.
echo "1 above acl max"
check_acls $acl3 $ACL_MAX_ENTRIES

echo "use 16 aces"
check_acls $acl4 16

echo "use 17 aces"
check_acls $acl5 17

# success, all done
status=0
exit