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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2023 Meta Platforms, Inc. All Rights Reserved.
#
# FS QA Test 300
#
# Validate that snapshots taken while in a remapped namespace preserve
# the permissions of the user.
#
. ./common/preamble
_begin_fstest auto quick subvol snapshot
_register_cleanup "cleanup"
_supported_fs btrfs
_fixed_by_kernel_commit 94628ad94408 \
"btrfs: copy dir permission and time when creating a stub subvolume"
_require_test
_require_user
_require_group
_require_unix_perm_checking
_require_unshare --keep-caps --map-auto --map-root-user
test_dir="${TEST_DIR}/${seq}"
cleanup() {
rm -rf $test_dir
cd /
rm -rf $tmp.*
}
rm -rf $test_dir
mkdir $test_dir
chown $qa_user:$qa_group $test_dir
# _user_do executes each command as $qa_user in its own subshell. unshare
# sets the namespace for the running shell. The test must run in one user
# subshell to preserve the namespace over multiple commands.
_user_do "
cd ${test_dir};
unshare --user --keep-caps --map-auto --map-root-user;
$BTRFS_UTIL_PROG subvolume create subvol;
touch subvol/{1,2,3};
$BTRFS_UTIL_PROG subvolume create subvol/subsubvol;
touch subvol/subsubvol/{4,5,6};
$BTRFS_UTIL_PROG subvolume snapshot subvol snapshot > /dev/null;
"
find $test_dir/. -printf "%M %u %g ./%P\n"
status=0
exit
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