diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/fstree.h | 78 | ||||
| -rw-r--r-- | include/squashfs.h | 177 |
2 files changed, 255 insertions, 0 deletions
diff --git a/include/fstree.h b/include/fstree.h new file mode 100644 index 0000000..68bbc7d --- /dev/null +++ b/include/fstree.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#ifndef FSTREE_H +#define FSTREE_H + +#include <sys/types.h> +#include <sys/stat.h> +#include <stdbool.h> +#include <stdint.h> +#include <stddef.h> + +typedef struct tree_node_t tree_node_t; +typedef struct file_info_t file_info_t; +typedef struct dir_info_t dir_info_t; +typedef struct fstree_t fstree_t; + +struct file_info_t { + char *input_file; + file_info_t *frag_next; + uint64_t size; + uint64_t startblock; + uint32_t fragment; + uint32_t fragment_offset; + uint32_t blocksizes[]; +}; + +struct dir_info_t { + tree_node_t *children; + uint64_t size; + uint64_t start_block; + uint32_t block_offset; + bool created_implicitly; +}; + +struct tree_node_t { + tree_node_t *next; + char *name; + uint32_t uid; + uint32_t gid; + uint16_t mode; + + union { + dir_info_t *dir; + file_info_t *file; + char *slink_target; + uint64_t devno; + } data; + + uint8_t payload[]; +}; + +struct fstree_t { + uint32_t default_uid; + uint32_t default_gid; + uint32_t default_mode; + uint32_t default_mtime; + size_t block_size; + + tree_node_t *root; +}; + +int fstree_init(fstree_t *fs, size_t block_size, uint32_t mtime, + uint16_t default_mode, uint32_t default_uid, + uint32_t default_gid); + +void fstree_cleanup(fstree_t *fs); + +tree_node_t *fstree_add(fstree_t *fs, const char *path, uint16_t mode, + uint32_t uid, uint32_t gid, size_t extra_len); + +tree_node_t *fstree_add_file(fstree_t *fs, const char *path, uint16_t mode, + uint32_t uid, uint32_t gid, uint64_t filesz, + const char *input); + +int fstree_from_file(fstree_t *fs, const char *filename); + +void fstree_sort(fstree_t *fs); + +#endif /* FSTREE_H */ diff --git a/include/squashfs.h b/include/squashfs.h new file mode 100644 index 0000000..68f9fce --- /dev/null +++ b/include/squashfs.h @@ -0,0 +1,177 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#ifndef SQUASHFS_H +#define SQUASHFS_H + +#include <stdint.h> + +#define SQFS_MAGIC 0x73717368 +#define SQFS_VERSION_MAJOR 4 +#define SQFS_VERSION_MINOR 0 +#define SQFS_META_BLOCK_SIZE 8192 +#define SQFS_DEFAULT_BLOCK_SIZE 131072 +#define SQFS_DEVBLK_SIZE 4096 +#define SQFS_MAX_DIR_ENT 256 + +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 struct { + uint64_t start_offset; + uint32_t size; + uint32_t pad0; +} sqfs_fragment_t; + +typedef struct { + uint16_t type; + uint16_t mode; + uint16_t uid_idx; + uint16_t gid_idx; + uint32_t mod_time; + uint32_t inode_number; +} sqfs_inode_t; + +typedef struct { + uint32_t nlink; + uint32_t devno; +} sqfs_inode_dev_t; + +typedef struct { + uint32_t nlink; + uint32_t devno; + uint32_t xattr_idx; +} sqfs_inode_dev_ext_t; + +typedef struct { + uint32_t nlink; + uint32_t target_size; + uint8_t target[]; +} sqfs_inode_slink_t; + +typedef struct { + uint32_t blocks_start; + uint32_t fragment_index; + uint32_t fragment_offset; + uint32_t file_size; + uint32_t block_sizes[]; +} sqfs_inode_file_t; + +typedef struct { + uint64_t blocks_start; + uint64_t file_size; + uint64_t sparse; + uint32_t nlink; + uint32_t fragment_idx; + uint32_t fragment_offset; + uint32_t xattr_idx; + uint32_t block_sizes[]; +} sqfs_inode_file_ext_t; + +typedef struct { + uint32_t start_block; + uint32_t nlink; + uint16_t size; + uint16_t offset; + uint32_t parent_inode; +} sqfs_inode_dir_t; + +typedef struct { + uint32_t nlink; + uint32_t size; + uint32_t start_block; + uint32_t parent_inode; + uint16_t inodex_count; + uint16_t offset; + uint32_t xattr_idx; +} sqfs_inode_dir_ext_t; + +typedef union { + sqfs_inode_t inode; + + union { + sqfs_inode_dev_t dev; + sqfs_inode_dev_ext_t dev_ext; + sqfs_inode_slink_t slink; + sqfs_inode_file_t file; + sqfs_inode_file_ext_t file_ext; + sqfs_inode_dir_t dir; + sqfs_inode_dir_ext_t dir_ext; + } data; +} sqfs_inode_generic_t; + +typedef struct { + uint32_t count; + uint32_t start_block; + uint32_t inode_number; +} sqfs_dir_header_t; + +typedef struct { + uint16_t offset; + uint16_t inode_number; + uint16_t type; + uint16_t size; + uint8_t name[]; +} sqfs_dir_entry_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; + +typedef enum { + SQFS_INODE_DIR = 1, + SQFS_INODE_FILE = 2, + SQFS_INODE_SLINK = 3, + SQFS_INODE_BDEV = 4, + SQFS_INODE_CDEV = 5, + SQFS_INODE_FIFO = 6, + SQFS_INODE_SOCKET = 7, + SQFS_INODE_EXT_DIR = 8, + SQFS_INODE_EXT_FILE = 9, + SQFS_INODE_EXT_SLINK = 10, + SQFS_INODE_EXT_BDEV = 11, + SQFS_INODE_EXT_CDEV = 12, + SQFS_INODE_EXT_FIFO = 13, + SQFS_INODE_EXT_SOCKET = 14, +} E_SQFS_INODE_TYPE; + +#endif /* SQUASHFS_H */ |