blob: 41f13e8a9ec32f072fbcba27d5f4e42d0061d028 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020 Bootlin
*
* Author: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
*/
#ifndef SQFS_UTILS_H
#define SQFS_UTILS_H
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <stdbool.h>
#define SQFS_FRAGMENT_INDEX_OFFSET(A) ((A) % SQFS_MAX_ENTRIES)
#define SQFS_FRAGMENT_INDEX(A) ((A) / SQFS_MAX_ENTRIES)
#define SQFS_BLOCK_SIZE(A) ((A) & GENMASK(23, 0))
/* Useful for both fragment and data blocks */
#define SQFS_COMPRESSED_BLOCK(A) (!((A) & BIT(24)))
#define SQFS_IS_FRAGMENTED(A) ((A) != 0xFFFFFFFF)
/*
* These two macros work as getters for a metada block header, retrieving the
* data size and if it is compressed/uncompressed
*/
#define SQFS_COMPRESSED_METADATA(A) (!((A) & BIT(15)))
#define SQFS_METADATA_SIZE(A) ((A) & GENMASK(14, 0))
#endif /* SQFS_UTILS_H */
|
