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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* super.h - This file is part of libsquashfs
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef SQFS_SUPER_H
#define SQFS_SUPER_H
#include "sqfs/predef.h"
#define SQFS_MAGIC 0x73717368
#define SQFS_VERSION_MAJOR 4
#define SQFS_VERSION_MINOR 0
#define SQFS_DEVBLK_SIZE 4096
#define SQFS_DEFAULT_BLOCK_SIZE 131072
struct sqfs_super_t {
uint32_t magic;
uint32_t inode_count;
uint32_t modification_time;
uint32_t block_size;
uint32_t fragment_entry_count;
uint16_t compression_id;
uint16_t block_log;
uint16_t flags;
uint16_t id_count;
uint16_t version_major;
uint16_t version_minor;
uint64_t root_inode_ref;
uint64_t bytes_used;
uint64_t id_table_start;
uint64_t xattr_id_table_start;
uint64_t inode_table_start;
uint64_t directory_table_start;
uint64_t fragment_table_start;
uint64_t export_table_start;
};
typedef enum {
SQFS_COMP_GZIP = 1,
SQFS_COMP_LZMA = 2,
SQFS_COMP_LZO = 3,
SQFS_COMP_XZ = 4,
SQFS_COMP_LZ4 = 5,
SQFS_COMP_ZSTD = 6,
SQFS_COMP_MIN = 1,
SQFS_COMP_MAX = 6,
} E_SQFS_COMPRESSOR;
typedef enum {
SQFS_FLAG_UNCOMPRESSED_INODES = 0x0001,
SQFS_FLAG_UNCOMPRESSED_DATA = 0x0002,
SQFS_FLAG_UNCOMPRESSED_FRAGMENTS = 0x0008,
SQFS_FLAG_NO_FRAGMENTS = 0x0010,
SQFS_FLAG_ALWAYS_FRAGMENTS = 0x0020,
SQFS_FLAG_DUPLICATES = 0x0040,
SQFS_FLAG_EXPORTABLE = 0x0080,
SQFS_FLAG_UNCOMPRESSED_XATTRS = 0x0100,
SQFS_FLAG_NO_XATTRS = 0x0200,
SQFS_FLAG_COMPRESSOR_OPTIONS = 0x0400,
SQFS_FLAG_UNCOMPRESSED_IDS = 0x0800,
} E_SQFS_SUPER_FLAGS;
#ifdef __cplusplus
extern "C" {
#endif
/* Returns 0 on success. Prints error messages to stderr on failure. */
SQFS_API int sqfs_super_init(sqfs_super_t *super, size_t block_size,
uint32_t mtime,
E_SQFS_COMPRESSOR compressor);
/* Returns 0 on success. Prints error messages to stderr on failure. */
SQFS_API int sqfs_super_write(sqfs_super_t *super, sqfs_file_t *file);
/* Returns 0 on success. Prints error messages to stderr on failure. */
SQFS_API int sqfs_super_read(sqfs_super_t *super, sqfs_file_t *file);
#ifdef __cplusplus
}
#endif
#endif /* SQFS_SUPER_H */
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