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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Red hat, Inc. All Rights Reserved.
#
# FS QA Test 403
#
# Test racing getxattr requests against large xattr add and remove loop. This
# reproduces a bug on XFS where a getxattr of an existing attribute spuriously
# returned failure due to races with attribute fork conversion.
#
. ./common/preamble
_begin_fstest auto quick attr
# Import common functions.
. ./common/attr
# real QA test starts here
# Modify as appropriate.
_supported_fs generic
_require_scratch
_require_attrs trusted
_scratch_mkfs > $seqres.full 2>&1 || _fail "mkfs"
_scratch_mount
# create xattr small enough for local format on XFS
touch $SCRATCH_MNT/file
$SETFATTR_PROG -n trusted.small -v a $SCRATCH_MNT/file
# start a background getxattr loop for the existing xattr
runfile="$tmp.getfattr"
touch $runfile
while [ -e $runfile ]; do
_getfattr --absolute-names -n trusted.small $SCRATCH_MNT/file \
> /dev/null || break
done &
getfattr_pid=$!
# while the above is spinning, add and remove a large attribute to cause back
# and forth inode attribute fork conversion
largeval=`for i in $(seq 0 511); do echo -n a; done`
for i in $(seq 0 99); do
$SETFATTR_PROG -n trusted.big -v $largeval $SCRATCH_MNT/file
$SETFATTR_PROG -x trusted.big $SCRATCH_MNT/file
done
rm -f $runfile
wait > /dev/null 2>&1
echo Silence is golden
# success, all done
status=0
exit
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