linux/fs/f2fs/hash.c

// SPDX-License-Identifier: GPL-2.0
/*
 * fs/f2fs/hash.c
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 *
 * Portions of this code from linux/fs/ext3/hash.c
 *
 * Copyright (C) 2002 by Theodore Ts'o
 */
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/f2fs_fs.h>
#include <linux/pagemap.h>
#include <linux/unicode.h>

#include "f2fs.h"

/*
 * Hashing code copied from ext3
 */
#define DELTA …

static void TEA_transform(unsigned int buf[4], unsigned int const in[])
{ … }

static void str2hashbuf(const unsigned char *msg, size_t len,
				unsigned int *buf, int num)
{ … }

static u32 TEA_hash_name(const u8 *p, size_t len)
{ … }

/*
 * Compute @fname->hash.  For all directories, @fname->disk_name must be set.
 * For casefolded directories, @fname->usr_fname must be set, and also
 * @fname->cf_name if the filename is valid Unicode and is not "." or "..".
 */
void f2fs_hash_filename(const struct inode *dir, struct f2fs_filename *fname)
{ … }