/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
-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);