#ifndef SQUASHFS_FS #define SQUASHFS_FS /* * Squashfs * * Copyright (c) 2002, 2003, 2004, 2005, 2006 * 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_fs.h */ #define SQUASHFS_MAJOR 3 #define SQUASHFS_MINOR 0 #define SQUASHFS_MAGIC 0x73717368 #define SQUASHFS_MAGIC_SWAP 0x68737173 #define SQUASHFS_START 0 /* size of metadata (inode and directory) blocks */ #define SQUASHFS_METADATA_SIZE 8192 #define SQUASHFS_METADATA_LOG 13 /* default size of data blocks */ #define SQUASHFS_FILE_SIZE 65536 #define SQUASHFS_FILE_LOG 16 #define SQUASHFS_FILE_MAX_SIZE 65536 /* Max number of uids and gids */ #define SQUASHFS_UIDS 256 #define SQUASHFS_GUIDS 255 /* Max length of filename (not 255) */ #define SQUASHFS_NAME_LEN 256 #define SQUASHFS_INVALID ((long long) 0xffffffffffff) #define SQUASHFS_INVALID_FRAG ((unsigned int) 0xffffffff) #define SQUASHFS_INVALID_BLK ((long long) -1) #define SQUASHFS_USED_BLK ((long long) -2) /* Filesystem flags */ #define SQUASHFS_NOI 0 #define SQUASHFS_NOD 1 #define SQUASHFS_CHECK 2 #define SQUASHFS_NOF 3 #define SQUASHFS_NO_FRAG 4 #define SQUASHFS_ALWAYS_FRAG 5 #define SQUASHFS_DUPLICATE 6 #define SQUASHFS_BIT(flag, bit) ((flag >> bit) & 1) #define SQUASHFS_UNCOMPRESSED_INODES(flags) SQUASHFS_BIT(flags, \ SQUASHFS_NOI) #define SQUASHFS_UNCOMPRESSED_DATA(flags) SQUASHFS_BIT(flags, \ SQUASHFS_NOD) #define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags) SQUASHFS_BIT(flags, \ SQUASHFS_NOF) #define SQUASHFS_NO_FRAGMENTS(flags) SQUASHFS_BIT(flags, \ SQUASHFS_NO_FRAG) #define SQUASHFS_ALWAYS_FRAGMENTS(flags) SQUASHFS_BIT(flags, \ SQUASHFS_ALWAYS_FRAG) #define SQUASHFS_DUPLICATES(flags) SQUASHFS_BIT(flags, \ SQUASHFS_DUPLICATE) #define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, \ SQUASHFS_CHECK) #define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, \ duplicate_checking) (noi | (nod << 1) | (check_data << 2) \ | (nof << 3) | (no_frag << 4) | (always_frag << 5) | \ (duplicate_checking << 6)) /* Max number of types and file types */ #define SQUASHFS_DIR_TYPE 1 #define SQUASHFS_FILE_TYPE 2 #define SQUASHFS_SYMLINK_TYPE 3 #define SQUASHFS_BLKDEV_TYPE 4 #define SQUASHFS_CHRDEV_TYPE 5 #define SQUASHFS_FIFO_TYPE 6 #define SQUASHFS_SOCKET_TYPE 7 #define SQUASHFS_LDIR_TYPE 8 #define SQUASHFS_LREG_TYPE 9 /* 1.0 filesystem type definitions */ #define SQUASHFS_TYPES 5 #define SQUASHFS_IPC_TYPE 0 /* Flag whether block is compressed or uncompressed, bit is set if block is * uncompressed */ #define SQUASHFS_COMPRESSED_BIT (1 << 15) #define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \ (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT) #define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT)) #define SQUASHFS_COMPRESSED_BIT_BLOCK (1 << 24) #define SQUASHFS_COMPRESSED_SIZE_BLOCK(B) (((B) & \ ~SQUASHFS_COMPRESSED_BIT_BLOCK) ? (B) & \ ~SQUASHFS_COMPRESSED_BIT_BLOCK : SQUASHFS_COMPRESSED_BIT_BLOCK) #define SQUASHFS_COMPRESSED_BLOCK(B) (!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK)) /* * Inode number ops. Inodes consist of a compressed block number, and an * uncompressed offset within that block */ #define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16)) #define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff)) #define SQUASHFS_MKINODE(A, B) ((squashfs_inode_t)(((squashfs_inode_t) (A)\ << 16) + (B))) /* Compute 32 bit VFS inode number from squashfs inode number */ #define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + \ ((b) >> 2) + 1)) /* XXX */ /* Translate between VFS mode and squashfs mode */ #define SQUASHFS_MODE(a) ((a) & 0xfff) /* fragment and fragment table defines */ #define SQUASHFS_FRAGMENT_BYTES(A) (A * sizeof(struct squashfs_fragment_entry)) #define SQUASHFS_FRAGMENT_INDEX(A) (SQUASHFS_FRAGMENT_BYTES(A) / \ SQUASHFS_METADATA_SIZE) #define SQUASHFS_FRAGMENT_INDEX_OFFSET(A) (SQUASHFS_FRAGMENT_BYTES(A) % \ SQUASHFS_METADATA_SIZE) #define SQUASHFS_FRAGMENT_INDEXES(A) ((SQUASHFS_FRAGMENT_BYTES(A) + \ SQUASHFS_METADATA_SIZE - 1) / \ SQUASHFS_METADATA_SIZE) #define SQUASHFS_FRAGMENT_INDEX_BYTES(A) (SQUASHFS_FRAGMENT_INDEXES(A) *\ sizeof(long long)) #define SQUASHFS_CACHED_FRAGMENTS 3 /* cached data constants for filesystem */ #define SQUASHFS_CACHED_BLKS 8 #define SQUASHFS_MAX_FILE_SIZE_LOG 64 #define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << \ (SQUASHFS_MAX_FILE_SIZE_LOG - 2)) #define SQUASHFS_MARKER_BYTE 0xff /* * definitions for structures on disk */ typedef long long squashfs_block_t; typedef long long squashfs_inode_t; struct squashfs_super_block { 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; unsigned int mkfs_time /* time of filesystem creation */; squashfs_inode_t 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 unused; } __attribute__ ((packed)); struct squashfs_dir_index { unsigned int index; unsigned int start_block; unsigned char size; unsigned char name[0]; } __attribute__ ((packed)); #define SQUASHFS_BASE_INODE_HEADER \ unsigned int inode_type:4; \ unsigned int mode:12; \ unsigned int uid:8; \ unsigned int guid:8; \ unsigned int mtime; \ unsigned int inode_number; struct squashfs_base_inode_header { SQUASHFS_BASE_INODE_HEADER; } __attribute__ ((packed)); struct squashfs_ipc_inode_header { SQUASHFS_BASE_INODE_HEADER; unsigned int nlink; } __attribute__ ((packed)); struct squashfs_dev_inode_header { SQUASHFS_BASE_INODE_HEADER; unsigned int nlink; unsigned short rdev; } __attribute__ ((packed)); struct squashfs_symlink_inode_header { SQUASHFS_BASE_INODE_HEADER; unsigned int nlink; unsigned short symlink_size; char symlink[0]; } __attribute__ ((packed)); struct squashfs_reg_inode_header { SQUASHFS_BASE_INODE_HEADER; squashfs_block_t start_block; unsigned int fragment; unsigned int offset; unsigned int file_size; unsigned short block_list[0]; } __attribute__ ((packed)); struct squashfs_lreg_inode_header { SQUASHFS_BASE_INODE_HEADER; unsigned int nlink; squashfs_block_t start_block; unsigned int fragment; unsigned int offset; long long file_size; unsigned short block_list[0]; } __attribute__ ((packed)); struct squashfs_dir_inode_header { SQUASHFS_BASE_INODE_HEADER; 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 { SQUASHFS_BASE_INODE_HEADER; 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 index[0]; } __attribute__ ((packed)); union squashfs_inode_header { struct squashfs_base_inode_header base; struct squashfs_dev_inode_header dev; struct squashfs_symlink_inode_header symlink; struct squashfs_reg_inode_header reg; struct squashfs_lreg_inode_header lreg; struct squashfs_dir_inode_header dir; struct squashfs_ldir_inode_header ldir; struct squashfs_ipc_inode_header ipc; }; struct squashfs_dir_entry { 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 { unsigned int count:8; unsigned int start_block; unsigned int inode_number; } __attribute__ ((packed)); struct squashfs_fragment_entry { long long start_block; unsigned int size; unsigned int unused; } __attribute__ ((packed)); extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen); extern int squashfs_uncompress_init(void); extern int squashfs_uncompress_exit(void); /* * 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(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_super_block));\ 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)->unused, d, 888, 64);\ } #define SQUASHFS_SWAP_BASE_INODE_CORE(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(s, d, n) {\ SQUASHFS_SWAP_START\ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\ } #define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ sizeof(struct squashfs_ipc_inode_header))\ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\ } #define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ sizeof(struct squashfs_dev_inode_header)); \ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\ SQUASHFS_SWAP((s)->rdev, d, 128, 16);\ } #define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ sizeof(struct squashfs_symlink_inode_header));\ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\ SQUASHFS_SWAP((s)->symlink_size, d, 128, 16);\ } #define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ sizeof(struct squashfs_reg_inode_header));\ 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(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ sizeof(struct squashfs_lreg_inode_header));\ 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(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ sizeof(struct squashfs_dir_inode_header));\ 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(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ sizeof(struct squashfs_ldir_inode_header));\ 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(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index));\ 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(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header));\ 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(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry));\ 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_FRAGMENT_ENTRY(s, d) {\ SQUASHFS_SWAP_START\ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry));\ SQUASHFS_SWAP((s)->start_block, d, 0, 64);\ SQUASHFS_SWAP((s)->size, d, 64, 32);\ } #define SQUASHFS_SWAP_SHORTS(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(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(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(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n) #ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY 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 */ unsigned 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; unsigned int mtime; unsigned int start_block:24; } __attribute__ ((packed)); #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, SQUASHFS_MAX_FILE_SIZE_LOG);\ } #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);\ } #endif #ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY 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 */ unsigned 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; unsigned 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; unsigned 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)); #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, SQUASHFS_MAX_FILE_SIZE_LOG);\ } #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(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)) #endif #ifdef __KERNEL__ /* * macros used to swap each structure entry, taking into account * bitfields and different bitfield placing conventions on differing * architectures */ #include #ifdef __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))/* & ((1 << tbits) - 1)*/;\ } #define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n); #endif #endif