-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-int chattr_fd(int fd, unsigned value, unsigned mask);
-int chattr_path(const char *p, unsigned value, unsigned mask);
+#include <linux/fs.h>
+
+#include "missing_fs.h"
+
+/* The chattr() flags to apply when creating a new file *before* writing to it. In particular, flags such as
+ * FS_NOCOW_FL don't work if applied a-posteriori. All other flags are fine (or even necessary, think
+ * FS_IMMUTABLE_FL!) to apply after writing to the files. */
+#define CHATTR_EARLY_FL \
+ (FS_NOATIME_FL | \
+ FS_COMPR_FL | \
+ FS_NOCOW_FL | \
+ FS_NOCOMP_FL | \
+ FS_PROJINHERIT_FL)
+
+#define CHATTR_ALL_FL \
+ (FS_NOATIME_FL | \
+ FS_SYNC_FL | \
+ FS_DIRSYNC_FL | \
+ FS_APPEND_FL | \
+ FS_COMPR_FL | \
+ FS_NODUMP_FL | \
+ FS_EXTENT_FL | \
+ FS_IMMUTABLE_FL | \
+ FS_JOURNAL_DATA_FL | \
+ FS_SECRM_FL | \
+ FS_UNRM_FL | \
+ FS_NOTAIL_FL | \
+ FS_TOPDIR_FL | \
+ FS_NOCOW_FL | \
+ FS_PROJINHERIT_FL)
+
+int chattr_fd(int fd, unsigned value, unsigned mask, unsigned *previous);
+int chattr_path(const char *p, unsigned value, unsigned mask, unsigned *previous);
int read_attr_fd(int fd, unsigned *ret);
int read_attr_path(const char *p, unsigned *ret);