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Ventoy/SQUASHFS/squashfs-tools-4.4/squashfs-tools/squashfs_compat.h
longpanda 05a1b863a6 initial commit
2020-04-05 00:08:01 +08:00

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#ifndef SQUASHFS_COMPAT
#define SQUASHFS_COMPAT
/*
* Squashfs
*
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2014, 2019
* Phillip Lougher <phillip@squashfs.org.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2,
* 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 General Public License
* along with this program; if not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* squashfs_compat.h
*/
/*
* definitions for structures on disk - layout 3.x
*/
#define SQUASHFS_CHECK 2
#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, \
SQUASHFS_CHECK)
/* Max number of uids and gids */
#define SQUASHFS_UIDS 256
#define SQUASHFS_GUIDS 255
struct squashfs_super_block_3 {
unsigned int s_magic;
unsigned int inodes;
unsigned int bytes_used_2;
unsigned int uid_start_2;
unsigned int guid_start_2;
unsigned int inode_table_start_2;
unsigned int directory_table_start_2;
unsigned int s_major:16;
unsigned int s_minor:16;
unsigned int block_size_1:16;
unsigned int block_log:16;
unsigned int flags:8;
unsigned int no_uids:8;
unsigned int no_guids:8;
int mkfs_time /* time of filesystem creation */;
squashfs_inode root_inode;
unsigned int block_size;
unsigned int fragments;
unsigned int fragment_table_start_2;
long long bytes_used;
long long uid_start;
long long guid_start;
long long inode_table_start;
long long directory_table_start;
long long fragment_table_start;
long long lookup_table_start;
} __attribute__ ((packed));
struct squashfs_dir_index_3 {
unsigned int index;
unsigned int start_block;
unsigned char size;
unsigned char name[0];
} __attribute__ ((packed));
struct squashfs_base_inode_header_3 {
unsigned int inode_type:4;
unsigned int mode:12;
unsigned int uid:8;
unsigned int guid:8;
int mtime;
unsigned int inode_number;
} __attribute__ ((packed));
struct squashfs_ipc_inode_header_3 {
unsigned int inode_type:4;
unsigned int mode:12;
unsigned int uid:8;
unsigned int guid:8;
int mtime;
unsigned int inode_number;
unsigned int nlink;
} __attribute__ ((packed));
struct squashfs_dev_inode_header_3 {
unsigned int inode_type:4;
unsigned int mode:12;
unsigned int uid:8;
unsigned int guid:8;
int mtime;
unsigned int inode_number;
unsigned int nlink;
unsigned short rdev;
} __attribute__ ((packed));
struct squashfs_symlink_inode_header_3 {
unsigned int inode_type:4;
unsigned int mode:12;
unsigned int uid:8;
unsigned int guid:8;
int mtime;
unsigned int inode_number;
unsigned int nlink;
unsigned short symlink_size;
char symlink[0];
} __attribute__ ((packed));
struct squashfs_reg_inode_header_3 {
unsigned int inode_type:4;
unsigned int mode:12;
unsigned int uid:8;
unsigned int guid:8;
int mtime;
unsigned int inode_number;
squashfs_block start_block;
unsigned int fragment;
unsigned int offset;
unsigned int file_size;
unsigned short block_list[0];
} __attribute__ ((packed));
struct squashfs_lreg_inode_header_3 {
unsigned int inode_type:4;
unsigned int mode:12;
unsigned int uid:8;
unsigned int guid:8;
int mtime;
unsigned int inode_number;
unsigned int nlink;
squashfs_block start_block;
unsigned int fragment;
unsigned int offset;
long long file_size;
unsigned short block_list[0];
} __attribute__ ((packed));
struct squashfs_dir_inode_header_3 {
unsigned int inode_type:4;
unsigned int mode:12;
unsigned int uid:8;
unsigned int guid:8;
int mtime;
unsigned int inode_number;
unsigned int nlink;
unsigned int file_size:19;
unsigned int offset:13;
unsigned int start_block;
unsigned int parent_inode;
} __attribute__ ((packed));
struct squashfs_ldir_inode_header_3 {
unsigned int inode_type:4;
unsigned int mode:12;
unsigned int uid:8;
unsigned int guid:8;
int mtime;
unsigned int inode_number;
unsigned int nlink;
unsigned int file_size:27;
unsigned int offset:13;
unsigned int start_block;
unsigned int i_count:16;
unsigned int parent_inode;
struct squashfs_dir_index_3 index[0];
} __attribute__ ((packed));
union squashfs_inode_header_3 {
struct squashfs_base_inode_header_3 base;
struct squashfs_dev_inode_header_3 dev;
struct squashfs_symlink_inode_header_3 symlink;
struct squashfs_reg_inode_header_3 reg;
struct squashfs_lreg_inode_header_3 lreg;
struct squashfs_dir_inode_header_3 dir;
struct squashfs_ldir_inode_header_3 ldir;
struct squashfs_ipc_inode_header_3 ipc;
};
struct squashfs_dir_entry_3 {
unsigned int offset:13;
unsigned int type:3;
unsigned int size:8;
int inode_number:16;
char name[0];
} __attribute__ ((packed));
struct squashfs_dir_header_3 {
unsigned int count:8;
unsigned int start_block;
unsigned int inode_number;
} __attribute__ ((packed));
struct squashfs_fragment_entry_3 {
long long start_block;
unsigned int size;
unsigned int pending;
} __attribute__ ((packed));
typedef struct squashfs_super_block_3 squashfs_super_block_3;
typedef struct squashfs_dir_index_3 squashfs_dir_index_3;
typedef struct squashfs_base_inode_header_3 squashfs_base_inode_header_3;
typedef struct squashfs_ipc_inode_header_3 squashfs_ipc_inode_header_3;
typedef struct squashfs_dev_inode_header_3 squashfs_dev_inode_header_3;
typedef struct squashfs_symlink_inode_header_3 squashfs_symlink_inode_header_3;
typedef struct squashfs_reg_inode_header_3 squashfs_reg_inode_header_3;
typedef struct squashfs_lreg_inode_header_3 squashfs_lreg_inode_header_3;
typedef struct squashfs_dir_inode_header_3 squashfs_dir_inode_header_3;
typedef struct squashfs_ldir_inode_header_3 squashfs_ldir_inode_header_3;
typedef struct squashfs_dir_entry_3 squashfs_dir_entry_3;
typedef struct squashfs_dir_header_3 squashfs_dir_header_3;
typedef struct squashfs_fragment_entry_3 squashfs_fragment_entry_3;
/*
* macros to convert each packed bitfield structure from little endian to big
* endian and vice versa. These are needed when creating or using a filesystem
* on a machine with different byte ordering to the target architecture.
*
*/
#define SQUASHFS_SWAP_START \
int bits;\
int b_pos;\
unsigned long long val;\
unsigned char *s;\
unsigned char *d;
#define SQUASHFS_SWAP_SUPER_BLOCK_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_super_block_3));\
SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\
SQUASHFS_SWAP((s)->inodes, d, 32, 32);\
SQUASHFS_SWAP((s)->bytes_used_2, d, 64, 32);\
SQUASHFS_SWAP((s)->uid_start_2, d, 96, 32);\
SQUASHFS_SWAP((s)->guid_start_2, d, 128, 32);\
SQUASHFS_SWAP((s)->inode_table_start_2, d, 160, 32);\
SQUASHFS_SWAP((s)->directory_table_start_2, d, 192, 32);\
SQUASHFS_SWAP((s)->s_major, d, 224, 16);\
SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\
SQUASHFS_SWAP((s)->block_size_1, d, 256, 16);\
SQUASHFS_SWAP((s)->block_log, d, 272, 16);\
SQUASHFS_SWAP((s)->flags, d, 288, 8);\
SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\
SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\
SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\
SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\
SQUASHFS_SWAP((s)->block_size, d, 408, 32);\
SQUASHFS_SWAP((s)->fragments, d, 440, 32);\
SQUASHFS_SWAP((s)->fragment_table_start_2, d, 472, 32);\
SQUASHFS_SWAP((s)->bytes_used, d, 504, 64);\
SQUASHFS_SWAP((s)->uid_start, d, 568, 64);\
SQUASHFS_SWAP((s)->guid_start, d, 632, 64);\
SQUASHFS_SWAP((s)->inode_table_start, d, 696, 64);\
SQUASHFS_SWAP((s)->directory_table_start, d, 760, 64);\
SQUASHFS_SWAP((s)->fragment_table_start, d, 824, 64);\
SQUASHFS_SWAP((s)->lookup_table_start, d, 888, 64);\
}
#define SQUASHFS_SWAP_BASE_INODE_CORE_3(s, d, n)\
SQUASHFS_MEMSET(s, d, n);\
SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
SQUASHFS_SWAP((s)->mode, d, 4, 12);\
SQUASHFS_SWAP((s)->uid, d, 16, 8);\
SQUASHFS_SWAP((s)->guid, d, 24, 8);\
SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
SQUASHFS_SWAP((s)->inode_number, d, 64, 32);
#define SQUASHFS_SWAP_BASE_INODE_HEADER_3(s, d, n) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_3(s, d, n)\
}
#define SQUASHFS_SWAP_IPC_INODE_HEADER_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_3(s, d, \
sizeof(struct squashfs_ipc_inode_header_3))\
SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
}
#define SQUASHFS_SWAP_DEV_INODE_HEADER_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_3(s, d, \
sizeof(struct squashfs_dev_inode_header_3)); \
SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
SQUASHFS_SWAP((s)->rdev, d, 128, 16);\
}
#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_3(s, d, \
sizeof(struct squashfs_symlink_inode_header_3));\
SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
SQUASHFS_SWAP((s)->symlink_size, d, 128, 16);\
}
#define SQUASHFS_SWAP_REG_INODE_HEADER_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_3(s, d, \
sizeof(struct squashfs_reg_inode_header_3));\
SQUASHFS_SWAP((s)->start_block, d, 96, 64);\
SQUASHFS_SWAP((s)->fragment, d, 160, 32);\
SQUASHFS_SWAP((s)->offset, d, 192, 32);\
SQUASHFS_SWAP((s)->file_size, d, 224, 32);\
}
#define SQUASHFS_SWAP_LREG_INODE_HEADER_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_3(s, d, \
sizeof(struct squashfs_lreg_inode_header_3));\
SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
SQUASHFS_SWAP((s)->start_block, d, 128, 64);\
SQUASHFS_SWAP((s)->fragment, d, 192, 32);\
SQUASHFS_SWAP((s)->offset, d, 224, 32);\
SQUASHFS_SWAP((s)->file_size, d, 256, 64);\
}
#define SQUASHFS_SWAP_DIR_INODE_HEADER_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_3(s, d, \
sizeof(struct squashfs_dir_inode_header_3));\
SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
SQUASHFS_SWAP((s)->file_size, d, 128, 19);\
SQUASHFS_SWAP((s)->offset, d, 147, 13);\
SQUASHFS_SWAP((s)->start_block, d, 160, 32);\
SQUASHFS_SWAP((s)->parent_inode, d, 192, 32);\
}
#define SQUASHFS_SWAP_LDIR_INODE_HEADER_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_3(s, d, \
sizeof(struct squashfs_ldir_inode_header_3));\
SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
SQUASHFS_SWAP((s)->file_size, d, 128, 27);\
SQUASHFS_SWAP((s)->offset, d, 155, 13);\
SQUASHFS_SWAP((s)->start_block, d, 168, 32);\
SQUASHFS_SWAP((s)->i_count, d, 200, 16);\
SQUASHFS_SWAP((s)->parent_inode, d, 216, 32);\
}
#define SQUASHFS_SWAP_DIR_INDEX_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index_3));\
SQUASHFS_SWAP((s)->index, d, 0, 32);\
SQUASHFS_SWAP((s)->start_block, d, 32, 32);\
SQUASHFS_SWAP((s)->size, d, 64, 8);\
}
#define SQUASHFS_SWAP_DIR_HEADER_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header_3));\
SQUASHFS_SWAP((s)->count, d, 0, 8);\
SQUASHFS_SWAP((s)->start_block, d, 8, 32);\
SQUASHFS_SWAP((s)->inode_number, d, 40, 32);\
}
#define SQUASHFS_SWAP_DIR_ENTRY_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry_3));\
SQUASHFS_SWAP((s)->offset, d, 0, 13);\
SQUASHFS_SWAP((s)->type, d, 13, 3);\
SQUASHFS_SWAP((s)->size, d, 16, 8);\
SQUASHFS_SWAP((s)->inode_number, d, 24, 16);\
}
#define SQUASHFS_SWAP_INODE_T_3(s, d) SQUASHFS_SWAP_LONG_LONGS_3(s, d, 1)
#define SQUASHFS_SWAP_SHORTS_3(s, d, n) {\
int entry;\
int bit_position;\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, n * 2);\
for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
16)\
SQUASHFS_SWAP(s[entry], d, bit_position, 16);\
}
#define SQUASHFS_SWAP_INTS_3(s, d, n) {\
int entry;\
int bit_position;\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, n * 4);\
for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
32)\
SQUASHFS_SWAP(s[entry], d, bit_position, 32);\
}
#define SQUASHFS_SWAP_LONG_LONGS_3(s, d, n) {\
int entry;\
int bit_position;\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, n * 8);\
for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
64)\
SQUASHFS_SWAP(s[entry], d, bit_position, 64);\
}
#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\
int entry;\
int bit_position;\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, n * bits / 8);\
for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
bits)\
SQUASHFS_SWAP(s[entry], d, bit_position, bits);\
}
#define SQUASHFS_SWAP_FRAGMENT_INDEXES_3(s, d, n) SQUASHFS_SWAP_LONG_LONGS_3(s, d, n)
#define SQUASHFS_SWAP_LOOKUP_BLOCKS_3(s, d, n) SQUASHFS_SWAP_LONG_LONGS_3(s, d, n)
#define SQUASHFS_SWAP_FRAGMENT_ENTRY_3(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry_3));\
SQUASHFS_SWAP((s)->start_block, d, 0, 64);\
SQUASHFS_SWAP((s)->size, d, 64, 32);\
}
/* fragment and fragment table defines */
#define SQUASHFS_FRAGMENT_BYTES_3(A) ((A) * sizeof(struct squashfs_fragment_entry_3))
#define SQUASHFS_FRAGMENT_INDEX_3(A) (SQUASHFS_FRAGMENT_BYTES_3(A) / \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_FRAGMENT_INDEX_OFFSET_3(A) (SQUASHFS_FRAGMENT_BYTES_3(A) % \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_FRAGMENT_INDEXES_3(A) ((SQUASHFS_FRAGMENT_BYTES_3(A) + \
SQUASHFS_METADATA_SIZE - 1) / \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_FRAGMENT_INDEX_BYTES_3(A) (SQUASHFS_FRAGMENT_INDEXES_3(A) *\
sizeof(long long))
/* inode lookup table defines */
#define SQUASHFS_LOOKUP_BYTES_3(A) ((A) * sizeof(squashfs_inode))
#define SQUASHFS_LOOKUP_BLOCK_3(A) (SQUASHFS_LOOKUP_BYTES_3(A) / \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_LOOKUP_BLOCK_OFFSET_3(A) (SQUASHFS_LOOKUP_BYTES_3(A) % \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_LOOKUP_BLOCKS_3(A) ((SQUASHFS_LOOKUP_BYTES_3(A) + \
SQUASHFS_METADATA_SIZE - 1) / \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_LOOKUP_BLOCK_BYTES_3(A) (SQUASHFS_LOOKUP_BLOCKS(A) *\
sizeof(long long))
/*
* definitions for structures on disk - layout 1.x
*/
#define SQUASHFS_TYPES 5
#define SQUASHFS_IPC_TYPE 0
struct squashfs_base_inode_header_1 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:4; /* index into uid table */
unsigned int guid:4; /* index into guid table */
} __attribute__ ((packed));
struct squashfs_ipc_inode_header_1 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:4; /* index into uid table */
unsigned int guid:4; /* index into guid table */
unsigned int type:4;
unsigned int offset:4;
} __attribute__ ((packed));
struct squashfs_dev_inode_header_1 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:4; /* index into uid table */
unsigned int guid:4; /* index into guid table */
unsigned short rdev;
} __attribute__ ((packed));
struct squashfs_symlink_inode_header_1 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:4; /* index into uid table */
unsigned int guid:4; /* index into guid table */
unsigned short symlink_size;
char symlink[0];
} __attribute__ ((packed));
struct squashfs_reg_inode_header_1 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:4; /* index into uid table */
unsigned int guid:4; /* index into guid table */
int mtime;
unsigned int start_block;
unsigned int file_size:32;
unsigned short block_list[0];
} __attribute__ ((packed));
struct squashfs_dir_inode_header_1 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:4; /* index into uid table */
unsigned int guid:4; /* index into guid table */
unsigned int file_size:19;
unsigned int offset:13;
int mtime;
unsigned int start_block:24;
} __attribute__ ((packed));
union squashfs_inode_header_1 {
struct squashfs_base_inode_header_1 base;
struct squashfs_dev_inode_header_1 dev;
struct squashfs_symlink_inode_header_1 symlink;
struct squashfs_reg_inode_header_1 reg;
struct squashfs_dir_inode_header_1 dir;
struct squashfs_ipc_inode_header_1 ipc;
};
typedef struct squashfs_dir_index_1 squashfs_dir_index_1;
typedef struct squashfs_base_inode_header_1 squashfs_base_inode_header_1;
typedef struct squashfs_ipc_inode_header_1 squashfs_ipc_inode_header_1;
typedef struct squashfs_dev_inode_header_1 squashfs_dev_inode_header_1;
typedef struct squashfs_symlink_inode_header_1 squashfs_symlink_inode_header_1;
typedef struct squashfs_reg_inode_header_1 squashfs_reg_inode_header_1;
typedef struct squashfs_dir_inode_header_1 squashfs_dir_inode_header_1;
#define SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n) \
SQUASHFS_MEMSET(s, d, n);\
SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
SQUASHFS_SWAP((s)->mode, d, 4, 12);\
SQUASHFS_SWAP((s)->uid, d, 16, 4);\
SQUASHFS_SWAP((s)->guid, d, 20, 4);
#define SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, n) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n)\
}
#define SQUASHFS_SWAP_IPC_INODE_HEADER_1(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
sizeof(struct squashfs_ipc_inode_header_1));\
SQUASHFS_SWAP((s)->type, d, 24, 4);\
SQUASHFS_SWAP((s)->offset, d, 28, 4);\
}
#define SQUASHFS_SWAP_DEV_INODE_HEADER_1(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
sizeof(struct squashfs_dev_inode_header_1));\
SQUASHFS_SWAP((s)->rdev, d, 24, 16);\
}
#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
sizeof(struct squashfs_symlink_inode_header_1));\
SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\
}
#define SQUASHFS_SWAP_REG_INODE_HEADER_1(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
sizeof(struct squashfs_reg_inode_header_1));\
SQUASHFS_SWAP((s)->mtime, d, 24, 32);\
SQUASHFS_SWAP((s)->start_block, d, 56, 32);\
SQUASHFS_SWAP((s)->file_size, d, 88, 32);\
}
#define SQUASHFS_SWAP_DIR_INODE_HEADER_1(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
sizeof(struct squashfs_dir_inode_header_1));\
SQUASHFS_SWAP((s)->file_size, d, 24, 19);\
SQUASHFS_SWAP((s)->offset, d, 43, 13);\
SQUASHFS_SWAP((s)->mtime, d, 56, 32);\
SQUASHFS_SWAP((s)->start_block, d, 88, 24);\
}
/*
* definitions for structures on disk - layout 2.x
*/
struct squashfs_dir_index_2 {
unsigned int index:27;
unsigned int start_block:29;
unsigned char size;
unsigned char name[0];
} __attribute__ ((packed));
struct squashfs_base_inode_header_2 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:8; /* index into uid table */
unsigned int guid:8; /* index into guid table */
} __attribute__ ((packed));
struct squashfs_ipc_inode_header_2 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:8; /* index into uid table */
unsigned int guid:8; /* index into guid table */
} __attribute__ ((packed));
struct squashfs_dev_inode_header_2 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:8; /* index into uid table */
unsigned int guid:8; /* index into guid table */
unsigned short rdev;
} __attribute__ ((packed));
struct squashfs_symlink_inode_header_2 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:8; /* index into uid table */
unsigned int guid:8; /* index into guid table */
unsigned short symlink_size;
char symlink[0];
} __attribute__ ((packed));
struct squashfs_reg_inode_header_2 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:8; /* index into uid table */
unsigned int guid:8; /* index into guid table */
int mtime;
unsigned int start_block;
unsigned int fragment;
unsigned int offset;
unsigned int file_size:32;
unsigned short block_list[0];
} __attribute__ ((packed));
struct squashfs_dir_inode_header_2 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:8; /* index into uid table */
unsigned int guid:8; /* index into guid table */
unsigned int file_size:19;
unsigned int offset:13;
int mtime;
unsigned int start_block:24;
} __attribute__ ((packed));
struct squashfs_ldir_inode_header_2 {
unsigned int inode_type:4;
unsigned int mode:12; /* protection */
unsigned int uid:8; /* index into uid table */
unsigned int guid:8; /* index into guid table */
unsigned int file_size:27;
unsigned int offset:13;
int mtime;
unsigned int start_block:24;
unsigned int i_count:16;
struct squashfs_dir_index_2 index[0];
} __attribute__ ((packed));
union squashfs_inode_header_2 {
struct squashfs_base_inode_header_2 base;
struct squashfs_dev_inode_header_2 dev;
struct squashfs_symlink_inode_header_2 symlink;
struct squashfs_reg_inode_header_2 reg;
struct squashfs_dir_inode_header_2 dir;
struct squashfs_ldir_inode_header_2 ldir;
struct squashfs_ipc_inode_header_2 ipc;
};
struct squashfs_dir_header_2 {
unsigned int count:8;
unsigned int start_block:24;
} __attribute__ ((packed));
struct squashfs_dir_entry_2 {
unsigned int offset:13;
unsigned int type:3;
unsigned int size:8;
char name[0];
} __attribute__ ((packed));
struct squashfs_fragment_entry_2 {
unsigned int start_block;
unsigned int size;
} __attribute__ ((packed));
typedef struct squashfs_dir_index_2 squashfs_dir_index_2;
typedef struct squashfs_base_inode_header_2 squashfs_base_inode_header_2;
typedef struct squashfs_ipc_inode_header_2 squashfs_ipc_inode_header_2;
typedef struct squashfs_dev_inode_header_2 squashfs_dev_inode_header_2;
typedef struct squashfs_symlink_inode_header_2 squashfs_symlink_inode_header_2;
typedef struct squashfs_reg_inode_header_2 squashfs_reg_inode_header_2;
typedef struct squashfs_lreg_inode_header_2 squashfs_lreg_inode_header_2;
typedef struct squashfs_dir_inode_header_2 squashfs_dir_inode_header_2;
typedef struct squashfs_ldir_inode_header_2 squashfs_ldir_inode_header_2;
typedef struct squashfs_dir_entry_2 squashfs_dir_entry_2;
typedef struct squashfs_dir_header_2 squashfs_dir_header_2;
typedef struct squashfs_fragment_entry_2 squashfs_fragment_entry_2;
#define SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
SQUASHFS_MEMSET(s, d, n);\
SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
SQUASHFS_SWAP((s)->mode, d, 4, 12);\
SQUASHFS_SWAP((s)->uid, d, 16, 8);\
SQUASHFS_SWAP((s)->guid, d, 24, 8);\
#define SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, n) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
}
#define SQUASHFS_SWAP_IPC_INODE_HEADER_2(s, d) \
SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, sizeof(struct squashfs_ipc_inode_header_2))
#define SQUASHFS_SWAP_DEV_INODE_HEADER_2(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
sizeof(struct squashfs_dev_inode_header_2)); \
SQUASHFS_SWAP((s)->rdev, d, 32, 16);\
}
#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
sizeof(struct squashfs_symlink_inode_header_2));\
SQUASHFS_SWAP((s)->symlink_size, d, 32, 16);\
}
#define SQUASHFS_SWAP_REG_INODE_HEADER_2(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
sizeof(struct squashfs_reg_inode_header_2));\
SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
SQUASHFS_SWAP((s)->start_block, d, 64, 32);\
SQUASHFS_SWAP((s)->fragment, d, 96, 32);\
SQUASHFS_SWAP((s)->offset, d, 128, 32);\
SQUASHFS_SWAP((s)->file_size, d, 160, 32);\
}
#define SQUASHFS_SWAP_DIR_INODE_HEADER_2(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
sizeof(struct squashfs_dir_inode_header_2));\
SQUASHFS_SWAP((s)->file_size, d, 32, 19);\
SQUASHFS_SWAP((s)->offset, d, 51, 13);\
SQUASHFS_SWAP((s)->mtime, d, 64, 32);\
SQUASHFS_SWAP((s)->start_block, d, 96, 24);\
}
#define SQUASHFS_SWAP_LDIR_INODE_HEADER_2(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
sizeof(struct squashfs_ldir_inode_header_2));\
SQUASHFS_SWAP((s)->file_size, d, 32, 27);\
SQUASHFS_SWAP((s)->offset, d, 59, 13);\
SQUASHFS_SWAP((s)->mtime, d, 72, 32);\
SQUASHFS_SWAP((s)->start_block, d, 104, 24);\
SQUASHFS_SWAP((s)->i_count, d, 128, 16);\
}
#define SQUASHFS_SWAP_DIR_INDEX_2(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index_2));\
SQUASHFS_SWAP((s)->index, d, 0, 27);\
SQUASHFS_SWAP((s)->start_block, d, 27, 29);\
SQUASHFS_SWAP((s)->size, d, 56, 8);\
}
#define SQUASHFS_SWAP_DIR_HEADER_2(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header_2));\
SQUASHFS_SWAP((s)->count, d, 0, 8);\
SQUASHFS_SWAP((s)->start_block, d, 8, 24);\
}
#define SQUASHFS_SWAP_DIR_ENTRY_2(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry_2));\
SQUASHFS_SWAP((s)->offset, d, 0, 13);\
SQUASHFS_SWAP((s)->type, d, 13, 3);\
SQUASHFS_SWAP((s)->size, d, 16, 8);\
}
#define SQUASHFS_SWAP_FRAGMENT_ENTRY_2(s, d) {\
SQUASHFS_SWAP_START\
SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry_2));\
SQUASHFS_SWAP((s)->start_block, d, 0, 32);\
SQUASHFS_SWAP((s)->size, d, 32, 32);\
}
#define SQUASHFS_SWAP_FRAGMENT_INDEXES_2(s, d, n) SQUASHFS_SWAP_INTS_3(s, d, n)
/* fragment and fragment table defines */
#define SQUASHFS_FRAGMENT_BYTES_2(A) ((A) * sizeof(struct squashfs_fragment_entry_2))
#define SQUASHFS_FRAGMENT_INDEX_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) / \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_FRAGMENT_INDEX_OFFSET_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) % \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_FRAGMENT_INDEXES_2(A) ((SQUASHFS_FRAGMENT_BYTES_2(A) + \
SQUASHFS_METADATA_SIZE - 1) / \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_FRAGMENT_INDEX_BYTES_2(A) (SQUASHFS_FRAGMENT_INDEXES_2(A) *\
sizeof(int))
/*
* macros used to swap each structure entry, taking into account
* bitfields and different bitfield placing conventions on differing architectures
*/
#if __BYTE_ORDER == __BIG_ENDIAN
/* convert from little endian to big endian */
#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, b_pos)
#else
/* convert from big endian to little endian */
#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, 64 - tbits - b_pos)
#endif
#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\
b_pos = pos % 8;\
val = 0;\
s = (unsigned char *)p + (pos / 8);\
d = ((unsigned char *) &val) + 7;\
for(bits = 0; bits < (tbits + b_pos); bits += 8) \
*d-- = *s++;\
value = (val >> (SHIFT));\
}
#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n);
#endif
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