satip-axe/kernel/include/linux/squashfs_fs.h
2015-03-26 17:24:57 +01:00

936 lines
28 KiB
C

#ifndef SQUASHFS_FS
#define SQUASHFS_FS
/*
* Squashfs
*
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007
* 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
#define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
#define SQUASHFS_MAJOR 3
#define SQUASHFS_MINOR 1
#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 131072
#define SQUASHFS_FILE_LOG 17
#define SQUASHFS_FILE_MAX_SIZE 1048576
/* 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_EXPORT 7
#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_EXPORTABLE(flags) SQUASHFS_BIT(flags, \
SQUASHFS_EXPORT)
#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, \
SQUASHFS_CHECK)
#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, \
duplicate_checking, exortable) (noi | (nod << 1) | (check_data << 2) \
| (nof << 3) | (no_frag << 4) | (always_frag << 5) | \
(duplicate_checking << 6) | (exportable << 7))
/* 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)
#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))
/* inode lookup table defines */
#define SQUASHFS_LOOKUP_BYTES(A) ((A) * sizeof(squashfs_inode_t))
#define SQUASHFS_LOOKUP_BLOCK(A) (SQUASHFS_LOOKUP_BYTES(A) / \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_LOOKUP_BLOCK_OFFSET(A) (SQUASHFS_LOOKUP_BYTES(A) % \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_LOOKUP_BLOCKS(A) ((SQUASHFS_LOOKUP_BYTES(A) + \
SQUASHFS_METADATA_SIZE - 1) / \
SQUASHFS_METADATA_SIZE)
#define SQUASHFS_LOOKUP_BLOCK_BYTES(A) (SQUASHFS_LOOKUP_BLOCKS(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 lookup_table_start;
} __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 pending;
} __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)->lookup_table_start, 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_INODE_T(s, d) SQUASHFS_SWAP_LONG_LONGS(s, d, 1)
#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)
#define SQUASHFS_SWAP_LOOKUP_BLOCKS(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));
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;
};
#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