#ifndef SQUASHFS_COMPAT #define SQUASHFS_COMPAT /* * Squashfs * * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2014 * Phillip Lougher * * 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)) /* * 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 big endian to little endian */ #define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, b_pos) #else /* convert from little endian to big 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))/* & ((1 << tbits) - 1)*/;\ } #define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n); #endif