include/lapi/fs.h

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Referred from linux kernel include/uapi/linux/fs.h
 * Copyright (c) 2019 Petr Vorel <pvorel@suse.cz>
 * Copyright (c) Zilogic Systems Pvt. Ltd., 2018
 * Email: code@zilogic.com
 */

#ifdef HAVE_LINUX_FS_H
# include <linux/fs.h>
#endif

#include <sys/user.h>
#include <limits.h>
#include "lapi/abisize.h"

#ifndef LAPI_FS_H
#define LAPI_FS_H

#ifndef FS_IOC_GETFLAGS
#define	FS_IOC_GETFLAGS	_IOR('f', 1, long)
#endif

#ifndef FS_IOC_SETFLAGS
#define	FS_IOC_SETFLAGS	_IOW('f', 2, long)
#endif

#ifndef FS_COMPR_FL
#define	FS_COMPR_FL        0x00000004 /* Compress file */
#endif

#ifndef FS_IMMUTABLE_FL
#define FS_IMMUTABLE_FL	   0x00000010 /* Immutable file */
#endif

#ifndef FS_APPEND_FL
#define FS_APPEND_FL	   0x00000020 /* writes to file may only append */
#endif

#ifndef FS_NODUMP_FL
#define FS_NODUMP_FL	   0x00000040 /* do not dump file */
#endif

/*
 * Helper function to get MAX_LFS_FILESIZE.
 * Missing PAGE_SHIFT on some libc prevents defining MAX_LFS_FILESIZE.
 *
 * 64 bit: macro taken from kernel from include/linux/fs.h
 * 32 bit: own implementation
 */
static inline loff_t tst_max_lfs_filesize(void)
{
#ifdef TST_ABI64
	return (loff_t)LLONG_MAX;
#else
        long page_size = getpagesize();
        loff_t ret = ULONG_MAX;

        while (page_size >>= 1)
                ret <<= 1;

        return ret;
#endif
}

#endif