From a901d77efe116938bdaf5c0fc6075141ebb2bafc Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Sun, 1 Sep 2019 15:53:44 +0200 Subject: Break up squashfs.h into topic related headers Signed-off-by: David Oberhollenzer --- include/sqfs/compress.h | 2 +- include/sqfs/data.h | 28 +++++ include/sqfs/dir.h | 37 ++++++ include/sqfs/inode.h | 131 ++++++++++++++++++++++ include/sqfs/meta_reader.h | 6 +- include/sqfs/meta_writer.h | 6 +- include/sqfs/squashfs.h | 272 --------------------------------------------- include/sqfs/super.h | 79 +++++++++++++ include/sqfs/xattr.h | 57 ++++++++++ 9 files changed, 340 insertions(+), 278 deletions(-) create mode 100644 include/sqfs/data.h create mode 100644 include/sqfs/dir.h create mode 100644 include/sqfs/inode.h delete mode 100644 include/sqfs/squashfs.h create mode 100644 include/sqfs/super.h create mode 100644 include/sqfs/xattr.h (limited to 'include/sqfs') diff --git a/include/sqfs/compress.h b/include/sqfs/compress.h index 1dfba12..c6de185 100644 --- a/include/sqfs/compress.h +++ b/include/sqfs/compress.h @@ -14,7 +14,7 @@ #include #include -#include "squashfs.h" +#include "sqfs/super.h" typedef struct compressor_t compressor_t; diff --git a/include/sqfs/data.h b/include/sqfs/data.h new file mode 100644 index 0000000..1b70f45 --- /dev/null +++ b/include/sqfs/data.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +/* + * data.h + * + * Copyright (C) 2019 David Oberhollenzer + */ +#ifndef SQFS_DATA_H +#define SQFS_DATA_H + +#include "config.h" + +#include +#include +#include + +#define SQFS_META_BLOCK_SIZE 8192 + +#define SQFS_IS_BLOCK_COMPRESSED(size) (((size) & (1 << 24)) == 0) +#define SQFS_ON_DISK_BLOCK_SIZE(size) ((size) & ((1 << 24) - 1)) +#define SQFS_IS_SPARSE_BLOCK(size) (SQFS_ON_DISK_BLOCK_SIZE(size) == 0) + +typedef struct { + uint64_t start_offset; + uint32_t size; + uint32_t pad0; +} sqfs_fragment_t; + +#endif /* SQFS_DATA_H */ diff --git a/include/sqfs/dir.h b/include/sqfs/dir.h new file mode 100644 index 0000000..a1ca69c --- /dev/null +++ b/include/sqfs/dir.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +/* + * dir.h + * + * Copyright (C) 2019 David Oberhollenzer + */ +#ifndef SQFS_DIR_H +#define SQFS_DIR_H + +#include "config.h" + +#include + +#define SQFS_MAX_DIR_ENT 256 + +typedef struct { + uint32_t count; + uint32_t start_block; + uint32_t inode_number; +} sqfs_dir_header_t; + +typedef struct { + uint16_t offset; + int16_t inode_diff; + uint16_t type; + uint16_t size; + uint8_t name[]; +} sqfs_dir_entry_t; + +typedef struct { + uint32_t index; + uint32_t start_block; + uint32_t size; + uint8_t name[]; +} sqfs_dir_index_t; + +#endif /* SQFS_DIR_H */ diff --git a/include/sqfs/inode.h b/include/sqfs/inode.h new file mode 100644 index 0000000..ac809d3 --- /dev/null +++ b/include/sqfs/inode.h @@ -0,0 +1,131 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +/* + * inode.h + * + * Copyright (C) 2019 David Oberhollenzer + */ +#ifndef SQFS_INODE_H +#define SQFS_INODE_H + +#include "config.h" + +#include + +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; + +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; +} sqfs_inode_ipc_t; + +typedef struct { + uint32_t nlink; + uint32_t xattr_idx; +} sqfs_inode_ipc_ext_t; + +typedef struct { + uint32_t nlink; + uint32_t target_size; + /*uint8_t target[];*/ +} sqfs_inode_slink_t; + +typedef struct { + uint32_t nlink; + uint32_t target_size; + /*uint8_t target[];*/ + uint32_t xattr_idx; +} sqfs_inode_slink_ext_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 struct { + sqfs_inode_t base; + char *slink_target; + uint32_t *block_sizes; + + union { + sqfs_inode_dev_t dev; + sqfs_inode_dev_ext_t dev_ext; + sqfs_inode_ipc_t ipc; + sqfs_inode_ipc_ext_t ipc_ext; + sqfs_inode_slink_t slink; + sqfs_inode_slink_ext_t slink_ext; + 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; + + uint8_t extra[]; +} sqfs_inode_generic_t; + +#endif /* SQFS_INODE_H */ diff --git a/include/sqfs/meta_reader.h b/include/sqfs/meta_reader.h index d5628af..0de7401 100644 --- a/include/sqfs/meta_reader.h +++ b/include/sqfs/meta_reader.h @@ -9,8 +9,10 @@ #include "config.h" -#include "compress.h" -#include "squashfs.h" +#include "sqfs/compress.h" +#include "sqfs/inode.h" +#include "sqfs/data.h" +#include "sqfs/dir.h" typedef struct meta_reader_t meta_reader_t; diff --git a/include/sqfs/meta_writer.h b/include/sqfs/meta_writer.h index 762cc38..6c56c93 100644 --- a/include/sqfs/meta_writer.h +++ b/include/sqfs/meta_writer.h @@ -9,9 +9,9 @@ #include "config.h" -#include "compress.h" -#include "squashfs.h" -#include "id_table.h" +#include "sqfs/compress.h" +#include "sqfs/id_table.h" +#include "sqfs/data.h" #include "fstree.h" typedef struct { diff --git a/include/sqfs/squashfs.h b/include/sqfs/squashfs.h deleted file mode 100644 index eb35fdd..0000000 --- a/include/sqfs/squashfs.h +++ /dev/null @@ -1,272 +0,0 @@ -/* SPDX-License-Identifier: GPL-3.0-or-later */ -/* - * squashfs.h - * - * Copyright (C) 2019 David Oberhollenzer - */ -#ifndef SQUASHFS_H -#define SQUASHFS_H - -#include "config.h" - -#include -#include -#include - -#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 - -#define SQFS_IS_BLOCK_COMPRESSED(size) (((size) & (1 << 24)) == 0) -#define SQFS_ON_DISK_BLOCK_SIZE(size) ((size) & ((1 << 24) - 1)) -#define SQFS_IS_SPARSE_BLOCK(size) (SQFS_ON_DISK_BLOCK_SIZE(size) == 0) - -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; -} sqfs_inode_ipc_t; - -typedef struct { - uint32_t nlink; - uint32_t xattr_idx; -} sqfs_inode_ipc_ext_t; - -typedef struct { - uint32_t nlink; - uint32_t target_size; - /*uint8_t target[];*/ -} sqfs_inode_slink_t; - -typedef struct { - uint32_t nlink; - uint32_t target_size; - /*uint8_t target[];*/ - uint32_t xattr_idx; -} sqfs_inode_slink_ext_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 struct { - sqfs_inode_t base; - char *slink_target; - uint32_t *block_sizes; - - union { - sqfs_inode_dev_t dev; - sqfs_inode_dev_ext_t dev_ext; - sqfs_inode_ipc_t ipc; - sqfs_inode_ipc_ext_t ipc_ext; - sqfs_inode_slink_t slink; - sqfs_inode_slink_ext_t slink_ext; - 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; - - uint8_t extra[]; -} 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; - int16_t inode_diff; - uint16_t type; - uint16_t size; - uint8_t name[]; -} sqfs_dir_entry_t; - -typedef struct { - uint32_t index; - uint32_t start_block; - uint32_t size; - uint8_t name[]; -} sqfs_dir_index_t; - -typedef struct { - uint16_t type; - uint16_t size; - uint8_t key[]; -} sqfs_xattr_entry_t; - -typedef struct { - uint32_t size; - uint8_t value[]; -} sqfs_xattr_value_t; - -typedef struct { - uint64_t xattr; - uint32_t count; - uint32_t size; -} sqfs_xattr_id_t; - -typedef struct { - uint64_t xattr_table_start; - uint32_t xattr_ids; - uint32_t unused; -} sqfs_xattr_id_table_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; - -typedef enum { - SQUASHFS_XATTR_USER = 0, - SQUASHFS_XATTR_TRUSTED = 1, - SQUASHFS_XATTR_SECURITY = 2, - - SQUASHFS_XATTR_FLAG_OOL = 0x100, - SQUASHFS_XATTR_PREFIX_MASK = 0xFF, -} E_SQFS_XATTR_TYPE; - -/* 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); - -/* Get id from xattr key prefix or -1 if not supported */ -int sqfs_get_xattr_prefix_id(const char *key); - -/* Get a prefix string from the ID or NULL if unknown */ -const char *sqfs_get_xattr_prefix(E_SQFS_XATTR_TYPE id); - -/* Check if a given xattr key can be encoded in squashfs at all. */ -bool sqfs_has_xattr(const char *key); - -#endif /* SQUASHFS_H */ 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 + */ +#ifndef SQFS_SUPER_H +#define SQFS_SUPER_H + +#include "config.h" + +#include +#include + +#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 */ diff --git a/include/sqfs/xattr.h b/include/sqfs/xattr.h new file mode 100644 index 0000000..3d5da39 --- /dev/null +++ b/include/sqfs/xattr.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +/* + * xattr.h + * + * Copyright (C) 2019 David Oberhollenzer + */ +#ifndef SQFS_XATTR_H +#define SQFS_XATTR_H + +#include "config.h" + +#include +#include +#include + +typedef enum { + SQUASHFS_XATTR_USER = 0, + SQUASHFS_XATTR_TRUSTED = 1, + SQUASHFS_XATTR_SECURITY = 2, + + SQUASHFS_XATTR_FLAG_OOL = 0x100, + SQUASHFS_XATTR_PREFIX_MASK = 0xFF, +} E_SQFS_XATTR_TYPE; + +typedef struct { + uint16_t type; + uint16_t size; + uint8_t key[]; +} sqfs_xattr_entry_t; + +typedef struct { + uint32_t size; + uint8_t value[]; +} sqfs_xattr_value_t; + +typedef struct { + uint64_t xattr; + uint32_t count; + uint32_t size; +} sqfs_xattr_id_t; + +typedef struct { + uint64_t xattr_table_start; + uint32_t xattr_ids; + uint32_t unused; +} sqfs_xattr_id_table_t; + +/* Get a prefix string from the ID or NULL if unknown */ +const char *sqfs_get_xattr_prefix(E_SQFS_XATTR_TYPE id); + +/* Get id from xattr key prefix or -1 if not supported */ +int sqfs_get_xattr_prefix_id(const char *key); + +/* Check if a given xattr key can be encoded in squashfs at all. */ +bool sqfs_has_xattr(const char *key); + +#endif /* SQFS_XATTR_H */ -- cgit v1.2.3