diff options
Diffstat (limited to 'include/sqfs/super.h')
| -rw-r--r-- | include/sqfs/super.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/include/sqfs/super.h b/include/sqfs/super.h new file mode 100644 index 0000000..51a3a9e --- /dev/null +++ b/include/sqfs/super.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +/* + * super.h + * + * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at> + */ +#ifndef SQFS_SUPER_H +#define SQFS_SUPER_H + +#include "config.h" + +#include <stdint.h> +#include <stddef.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 + +typedef struct { + 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; +} __attribute__((packed)) sqfs_super_t; + +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; + +/* Returns 0 on success. Prints error messages to stderr on failure. */ +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. */ +int sqfs_super_write(sqfs_super_t *super, int fd); + +/* Returns 0 on success. Prints error messages to stderr on failure. */ +int sqfs_super_read(sqfs_super_t *super, int fd); + +#endif /* SQFS_SUPER_H */ |