mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 17:58:23 +00:00
c510061303
Add support for SquashFS filesystem. Right now, it does not support compression but support for zlib will be added in a follow-up commit. Signed-off-by: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/* 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))
|
|
#define SQFS_CHECK_FLAG(flag, bit) (((flag) >> (bit)) & 1)
|
|
/* Useful for both fragment and data blocks */
|
|
#define SQFS_COMPRESSED_BLOCK(A) (!((A) & BIT(24)))
|
|
/* SQFS_COMPRESSED_DATA strictly used with super block's 'flags' member */
|
|
#define SQFS_COMPRESSED_DATA(A) (!((A) & 0x0002))
|
|
#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))
|
|
|
|
struct squashfs_super_block_flags {
|
|
/* check: unused
|
|
* uncompressed_ids: not supported
|
|
*/
|
|
bool uncompressed_inodes;
|
|
bool uncompressed_data;
|
|
bool check;
|
|
bool uncompressed_frags;
|
|
bool no_frags;
|
|
bool always_frags;
|
|
bool duplicates;
|
|
bool exportable;
|
|
bool uncompressed_xattrs;
|
|
bool no_xattrs;
|
|
bool compressor_options;
|
|
bool uncompressed_ids;
|
|
};
|
|
|
|
#endif /* SQFS_UTILS_H */
|