#! /bin/bash
# FS QA Test No. 317
#
# Check uid/gid to/from disk with a user namespace. A new file
# will be created from inside a userns. We check that the uid/gid
# is correct from both inside the userns and also from init_user_ns.
# We will then unmount and remount the file system and check the
# uid/gid from both inside the userns and from init_user_ns to show
# that the correct uid was flushed and brought back from disk.
#
#-----------------------------------------------------------------------
# Copyright (C) 2013 Oracle, Inc.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#-----------------------------------------------------------------------
#

seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!

_cleanup()
{
    cd /
    _scratch_unmount >/dev/null 2>&1
}
trap "_cleanup; exit \$status" 0 1 2 3 15

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

file=$SCRATCH_MNT/file1

# real QA test starts here
_supported_fs generic
# only Linux supports user namespace
_supported_os Linux

[ -x $lstat64 ] || _notrun "$lstat64 executable not found"

rm -f $seqres.full

_require_scratch
_require_user
_require_ugid_map
_require_userns
qa_user_id=`grep $qa_user /etc/passwd |awk -F: '{print $3}'`

_filter_output()
{
    sed \
      -e "s/$qa_user_id/qa_user/g" \
      -e "s!$SCRATCH_MNT!\$SCRATCH_MNT!"
}

_print_numeric_uid()
{
    echo "From init_user_ns"
    src/lstat64 $file |head -3 |_filter_output

    echo "From user_ns"
    src/nsexec -s -U -M "0 $qa_user_id 1000" -G "0 $qa_user_id 1000" src/lstat64 $file |head -3 |_filter_output
}

_scratch_unmount >/dev/null 2>&1
echo "*** MKFS ***" >>$seqres.full
echo ""             >>$seqres.full
_scratch_mkfs       >>$seqres.full 2>&1 || _fail "mkfs failed"
_scratch_mount      >>$seqres.full 2>&1 || _fail "mount failed"
chmod 777 $SCRATCH_MNT

# create $file as "root" in userns, which is $qa_user in parent namespace
src/nsexec -s -U -M "0 $qa_user_id 1000" -G "0 $qa_user_id 1000" touch $file

_print_numeric_uid

echo ""
echo "*** Remounting ***"
echo ""
sync
_scratch_cycle_mount      >>$seqres.full 2>&1 || _fail "remount failed"

_print_numeric_uid

_scratch_unmount >/dev/null 2>&1
status=0
exit
