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- #ifndef SQUASHFS_FS
- #define SQUASHFS_FS
-
- /*
- * Squashfs
- *
- * Copyright (c) 2002, 2003, 2004, 2005, 2006
- * Phillip Lougher <phillip@lougher.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_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
- #define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
- #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
-