#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Ernesto A. Fernandez.  All Rights Reserved.
#
# FS QA Test 449
#
# Fill the device and set as many extended attributes to a file as
# possible. Then call setfacl on it and, if this fails for lack of
# space, test that the permissions remain the same.
#
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

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

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

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here

# Modify as appropriate.
_supported_fs generic
_require_scratch
_require_test
_require_acls
_require_attrs trusted

_scratch_mkfs_sized $((256 * 1024 * 1024)) >> $seqres.full 2>&1
_scratch_mount || _fail "mount failed"

# This is a test of xattr behavior when we run out of disk space for xattrs,
# so make sure the pwrite goes to the data device and not the rt volume.
test "$FSTYP" = "xfs" && \
	$XFS_IO_PROG -c 'chattr -t' $SCRATCH_MNT

TFILE=$SCRATCH_MNT/testfile.$seq

# Create the test file and choose its permissions
touch $TFILE
chmod u+rwx $TFILE
chmod go-rwx $TFILE

# Try to run out of space so setfacl will fail
$XFS_IO_PROG -c "pwrite 0 256m" $TFILE >>$seqres.full 2>&1
i=1

# Setting acls on an xfs filesystem will succeed even after running out of
# space for user attributes. Use trusted attributes
while $SETFATTR_PROG -n trusted.$i -v $(perl -e 'print "a"x1024') $TFILE &>/dev/null; do
	((++i))
done
j=1
ret=0
while [ $ret -eq 0 ]; do
	ret=1
	while [ $j -le 1000 ]; do
		# On btrfs, setfattr will sometimes fail when free space is
		# low, long before it's actually exhausted. Insist until it
		# fails consistently.
		$SETFATTR_PROG -n trusted.$i"x"$j $TFILE &>/dev/null
		ret=$(( $ret && $? ))
		((++j))
	done
	j=1
	((++i))
done

if setfacl -m m:r $TFILE &>/dev/null; then
	# setfacl succeeded, so the test was meaningless
	# The filesystem might still have an issue
	_notrun "$FSTYP succeeds in setting acls despite running out of space for user attrs"
fi

# Since setfacl failed, the permissions should not have changed
stat -c %A $TFILE

status=0
exit