| #ifndef SQUASHFS_FS |
| #define SQUASHFS_FS |
| |
| /* |
| * Squashfs |
| * |
| * Copyright (c) 2002, 2003, 2004, 2005, 2006 |
| * Phillip Lougher <phillip@lougher.demon.co.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_fs.h |
| */ |
| |
| #ifndef CONFIG_SQUASHFS_2_0_COMPATIBILITY |
| #define CONFIG_SQUASHFS_2_0_COMPATIBILITY |
| #endif |
| |
| #ifdef CONFIG_SQUASHFS_VMALLOC |
| #define SQUASHFS_ALLOC(a) vmalloc(a) |
| #define SQUASHFS_FREE(a) vfree(a) |
| #else |
| #define SQUASHFS_ALLOC(a) kmalloc(a, GFP_KERNEL) |
| #define SQUASHFS_FREE(a) kfree(a) |
| #endif |
| #ifdef CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE |
| #define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE |
| #else |
| #define SQUASHFS_CACHED_FRAGMENTS 3 |
| #endif |
| #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)) |
| |
| /* 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 |
| |
| /* meta index cache */ |
| #define SQUASHFS_META_INDEXES (SQUASHFS_METADATA_SIZE / sizeof(unsigned int)) |
| #define SQUASHFS_META_ENTRIES 31 |
| #define SQUASHFS_META_NUMBER 8 |
| #define SQUASHFS_SLOTS 4 |
| |
| struct meta_entry { |
| long long data_block; |
| unsigned int index_block; |
| unsigned short offset; |
| unsigned short pad; |
| }; |
| |
| struct meta_index { |
| unsigned int inode_number; |
| unsigned int offset; |
| unsigned short entries; |
| unsigned short skip; |
| unsigned short locked; |
| unsigned short pad; |
| struct meta_entry meta_entry[SQUASHFS_META_ENTRIES]; |
| }; |
| |
| |
| /* |
| * 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, 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);\ |
| } |
| |
| #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, 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(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 <asm/byteorder.h> |
| |
| #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 |
