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916 lines
27 KiB
C
916 lines
27 KiB
C
#ifndef SQUASHFS_FS
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#define SQUASHFS_FS
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/*
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* Squashfs
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006
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* Phillip Lougher <phillip@lougher.demon.co.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2,
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* or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* squashfs_fs.h
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*/
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#ifndef CONFIG_SQUASHFS_2_0_COMPATIBILITY
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#define CONFIG_SQUASHFS_2_0_COMPATIBILITY
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#endif
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#ifdef CONFIG_SQUASHFS_VMALLOC
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#define SQUASHFS_ALLOC(a) vmalloc(a)
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#define SQUASHFS_FREE(a) vfree(a)
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#else
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#define SQUASHFS_ALLOC(a) kmalloc(a, GFP_KERNEL)
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#define SQUASHFS_FREE(a) kfree(a)
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#endif
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#ifdef CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
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#define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
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#else
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#define SQUASHFS_CACHED_FRAGMENTS 3
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#endif
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#define SQUASHFS_MAJOR 3
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#define SQUASHFS_MINOR 0
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#define SQUASHFS_MAGIC 0x73717368
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#define SQUASHFS_MAGIC_SWAP 0x68737173
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#define SQUASHFS_START 0
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/* size of metadata (inode and directory) blocks */
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#define SQUASHFS_METADATA_SIZE 8192
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#define SQUASHFS_METADATA_LOG 13
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/* default size of data blocks */
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#define SQUASHFS_FILE_SIZE 65536
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#define SQUASHFS_FILE_LOG 16
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#define SQUASHFS_FILE_MAX_SIZE 65536
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/* Max number of uids and gids */
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#define SQUASHFS_UIDS 256
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#define SQUASHFS_GUIDS 255
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/* Max length of filename (not 255) */
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#define SQUASHFS_NAME_LEN 256
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#define SQUASHFS_INVALID ((long long) 0xffffffffffff)
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#define SQUASHFS_INVALID_FRAG ((unsigned int) 0xffffffff)
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#define SQUASHFS_INVALID_BLK ((long long) -1)
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#define SQUASHFS_USED_BLK ((long long) -2)
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/* Filesystem flags */
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#define SQUASHFS_NOI 0
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#define SQUASHFS_NOD 1
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#define SQUASHFS_CHECK 2
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#define SQUASHFS_NOF 3
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#define SQUASHFS_NO_FRAG 4
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#define SQUASHFS_ALWAYS_FRAG 5
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#define SQUASHFS_DUPLICATE 6
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#define SQUASHFS_BIT(flag, bit) ((flag >> bit) & 1)
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#define SQUASHFS_UNCOMPRESSED_INODES(flags) SQUASHFS_BIT(flags, \
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SQUASHFS_NOI)
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#define SQUASHFS_UNCOMPRESSED_DATA(flags) SQUASHFS_BIT(flags, \
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SQUASHFS_NOD)
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#define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
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SQUASHFS_NOF)
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#define SQUASHFS_NO_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
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SQUASHFS_NO_FRAG)
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#define SQUASHFS_ALWAYS_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
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SQUASHFS_ALWAYS_FRAG)
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#define SQUASHFS_DUPLICATES(flags) SQUASHFS_BIT(flags, \
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SQUASHFS_DUPLICATE)
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#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, \
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SQUASHFS_CHECK)
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#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, \
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duplicate_checking) (noi | (nod << 1) | (check_data << 2) \
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| (nof << 3) | (no_frag << 4) | (always_frag << 5) | \
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(duplicate_checking << 6))
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/* Max number of types and file types */
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#define SQUASHFS_DIR_TYPE 1
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#define SQUASHFS_FILE_TYPE 2
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#define SQUASHFS_SYMLINK_TYPE 3
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#define SQUASHFS_BLKDEV_TYPE 4
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#define SQUASHFS_CHRDEV_TYPE 5
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#define SQUASHFS_FIFO_TYPE 6
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#define SQUASHFS_SOCKET_TYPE 7
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#define SQUASHFS_LDIR_TYPE 8
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#define SQUASHFS_LREG_TYPE 9
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/* 1.0 filesystem type definitions */
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#define SQUASHFS_TYPES 5
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#define SQUASHFS_IPC_TYPE 0
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/* Flag whether block is compressed or uncompressed, bit is set if block is
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* uncompressed */
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#define SQUASHFS_COMPRESSED_BIT (1 << 15)
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#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \
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(B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT)
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#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT))
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#define SQUASHFS_COMPRESSED_BIT_BLOCK (1 << 24)
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#define SQUASHFS_COMPRESSED_SIZE_BLOCK(B) (((B) & \
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~SQUASHFS_COMPRESSED_BIT_BLOCK) ? (B) & \
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~SQUASHFS_COMPRESSED_BIT_BLOCK : SQUASHFS_COMPRESSED_BIT_BLOCK)
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#define SQUASHFS_COMPRESSED_BLOCK(B) (!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK))
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/*
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* Inode number ops. Inodes consist of a compressed block number, and an
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* uncompressed offset within that block
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*/
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#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16))
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#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff))
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#define SQUASHFS_MKINODE(A, B) ((squashfs_inode_t)(((squashfs_inode_t) (A)\
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<< 16) + (B)))
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/* Compute 32 bit VFS inode number from squashfs inode number */
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#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + \
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((b) >> 2) + 1))
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/* XXX */
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/* Translate between VFS mode and squashfs mode */
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#define SQUASHFS_MODE(a) ((a) & 0xfff)
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/* fragment and fragment table defines */
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#define SQUASHFS_FRAGMENT_BYTES(A) (A * sizeof(struct squashfs_fragment_entry))
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#define SQUASHFS_FRAGMENT_INDEX(A) (SQUASHFS_FRAGMENT_BYTES(A) / \
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SQUASHFS_METADATA_SIZE)
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#define SQUASHFS_FRAGMENT_INDEX_OFFSET(A) (SQUASHFS_FRAGMENT_BYTES(A) % \
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SQUASHFS_METADATA_SIZE)
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#define SQUASHFS_FRAGMENT_INDEXES(A) ((SQUASHFS_FRAGMENT_BYTES(A) + \
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SQUASHFS_METADATA_SIZE - 1) / \
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SQUASHFS_METADATA_SIZE)
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#define SQUASHFS_FRAGMENT_INDEX_BYTES(A) (SQUASHFS_FRAGMENT_INDEXES(A) *\
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sizeof(long long))
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/* cached data constants for filesystem */
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#define SQUASHFS_CACHED_BLKS 8
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#define SQUASHFS_MAX_FILE_SIZE_LOG 64
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#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << \
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(SQUASHFS_MAX_FILE_SIZE_LOG - 2))
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#define SQUASHFS_MARKER_BYTE 0xff
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/* meta index cache */
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#define SQUASHFS_META_INDEXES (SQUASHFS_METADATA_SIZE / sizeof(unsigned int))
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#define SQUASHFS_META_ENTRIES 31
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#define SQUASHFS_META_NUMBER 8
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#define SQUASHFS_SLOTS 4
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struct meta_entry {
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long long data_block;
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unsigned int index_block;
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unsigned short offset;
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unsigned short pad;
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};
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struct meta_index {
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unsigned int inode_number;
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unsigned int offset;
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unsigned short entries;
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unsigned short skip;
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unsigned short locked;
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unsigned short pad;
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struct meta_entry meta_entry[SQUASHFS_META_ENTRIES];
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};
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/*
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* definitions for structures on disk
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*/
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typedef long long squashfs_block_t;
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typedef long long squashfs_inode_t;
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struct squashfs_super_block {
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unsigned int s_magic;
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unsigned int inodes;
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unsigned int bytes_used_2;
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unsigned int uid_start_2;
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unsigned int guid_start_2;
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unsigned int inode_table_start_2;
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unsigned int directory_table_start_2;
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unsigned int s_major:16;
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unsigned int s_minor:16;
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unsigned int block_size_1:16;
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unsigned int block_log:16;
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unsigned int flags:8;
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unsigned int no_uids:8;
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unsigned int no_guids:8;
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unsigned int mkfs_time /* time of filesystem creation */;
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squashfs_inode_t root_inode;
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unsigned int block_size;
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unsigned int fragments;
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unsigned int fragment_table_start_2;
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long long bytes_used;
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long long uid_start;
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long long guid_start;
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long long inode_table_start;
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long long directory_table_start;
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long long fragment_table_start;
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long long unused;
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} __attribute__ ((packed));
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struct squashfs_dir_index {
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unsigned int index;
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unsigned int start_block;
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unsigned char size;
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unsigned char name[0];
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} __attribute__ ((packed));
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#define SQUASHFS_BASE_INODE_HEADER \
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unsigned int inode_type:4; \
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unsigned int mode:12; \
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unsigned int uid:8; \
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unsigned int guid:8; \
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unsigned int mtime; \
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unsigned int inode_number;
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struct squashfs_base_inode_header {
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SQUASHFS_BASE_INODE_HEADER;
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} __attribute__ ((packed));
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struct squashfs_ipc_inode_header {
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SQUASHFS_BASE_INODE_HEADER;
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unsigned int nlink;
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} __attribute__ ((packed));
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struct squashfs_dev_inode_header {
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SQUASHFS_BASE_INODE_HEADER;
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unsigned int nlink;
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unsigned short rdev;
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} __attribute__ ((packed));
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struct squashfs_symlink_inode_header {
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SQUASHFS_BASE_INODE_HEADER;
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unsigned int nlink;
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unsigned short symlink_size;
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char symlink[0];
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} __attribute__ ((packed));
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struct squashfs_reg_inode_header {
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SQUASHFS_BASE_INODE_HEADER;
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squashfs_block_t start_block;
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unsigned int fragment;
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unsigned int offset;
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unsigned int file_size;
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unsigned short block_list[0];
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} __attribute__ ((packed));
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struct squashfs_lreg_inode_header {
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SQUASHFS_BASE_INODE_HEADER;
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unsigned int nlink;
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squashfs_block_t start_block;
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unsigned int fragment;
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unsigned int offset;
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long long file_size;
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unsigned short block_list[0];
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} __attribute__ ((packed));
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struct squashfs_dir_inode_header {
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SQUASHFS_BASE_INODE_HEADER;
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unsigned int nlink;
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unsigned int file_size:19;
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unsigned int offset:13;
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unsigned int start_block;
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unsigned int parent_inode;
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} __attribute__ ((packed));
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struct squashfs_ldir_inode_header {
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SQUASHFS_BASE_INODE_HEADER;
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unsigned int nlink;
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unsigned int file_size:27;
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unsigned int offset:13;
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unsigned int start_block;
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unsigned int i_count:16;
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unsigned int parent_inode;
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struct squashfs_dir_index index[0];
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} __attribute__ ((packed));
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union squashfs_inode_header {
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struct squashfs_base_inode_header base;
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struct squashfs_dev_inode_header dev;
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struct squashfs_symlink_inode_header symlink;
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struct squashfs_reg_inode_header reg;
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struct squashfs_lreg_inode_header lreg;
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struct squashfs_dir_inode_header dir;
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struct squashfs_ldir_inode_header ldir;
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struct squashfs_ipc_inode_header ipc;
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};
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struct squashfs_dir_entry {
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unsigned int offset:13;
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unsigned int type:3;
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unsigned int size:8;
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int inode_number:16;
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char name[0];
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} __attribute__ ((packed));
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struct squashfs_dir_header {
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unsigned int count:8;
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unsigned int start_block;
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unsigned int inode_number;
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} __attribute__ ((packed));
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struct squashfs_fragment_entry {
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long long start_block;
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unsigned int size;
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unsigned int unused;
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} __attribute__ ((packed));
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extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen);
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extern int squashfs_uncompress_init(void);
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extern int squashfs_uncompress_exit(void);
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/*
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* macros to convert each packed bitfield structure from little endian to big
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* endian and vice versa. These are needed when creating or using a filesystem
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* on a machine with different byte ordering to the target architecture.
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*
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*/
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#define SQUASHFS_SWAP_START \
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int bits;\
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int b_pos;\
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unsigned long long val;\
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unsigned char *s;\
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unsigned char *d;
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#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\
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SQUASHFS_SWAP_START\
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SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_super_block));\
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SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\
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SQUASHFS_SWAP((s)->inodes, d, 32, 32);\
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SQUASHFS_SWAP((s)->bytes_used_2, d, 64, 32);\
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SQUASHFS_SWAP((s)->uid_start_2, d, 96, 32);\
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SQUASHFS_SWAP((s)->guid_start_2, d, 128, 32);\
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SQUASHFS_SWAP((s)->inode_table_start_2, d, 160, 32);\
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SQUASHFS_SWAP((s)->directory_table_start_2, d, 192, 32);\
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SQUASHFS_SWAP((s)->s_major, d, 224, 16);\
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SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\
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SQUASHFS_SWAP((s)->block_size_1, d, 256, 16);\
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SQUASHFS_SWAP((s)->block_log, d, 272, 16);\
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SQUASHFS_SWAP((s)->flags, d, 288, 8);\
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SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\
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SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\
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SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\
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SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\
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SQUASHFS_SWAP((s)->block_size, d, 408, 32);\
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SQUASHFS_SWAP((s)->fragments, d, 440, 32);\
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SQUASHFS_SWAP((s)->fragment_table_start_2, d, 472, 32);\
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SQUASHFS_SWAP((s)->bytes_used, d, 504, 64);\
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SQUASHFS_SWAP((s)->uid_start, d, 568, 64);\
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SQUASHFS_SWAP((s)->guid_start, d, 632, 64);\
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SQUASHFS_SWAP((s)->inode_table_start, d, 696, 64);\
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SQUASHFS_SWAP((s)->directory_table_start, d, 760, 64);\
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SQUASHFS_SWAP((s)->fragment_table_start, d, 824, 64);\
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SQUASHFS_SWAP((s)->unused, d, 888, 64);\
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}
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#define SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
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SQUASHFS_MEMSET(s, d, n);\
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SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
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SQUASHFS_SWAP((s)->mode, d, 4, 12);\
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SQUASHFS_SWAP((s)->uid, d, 16, 8);\
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SQUASHFS_SWAP((s)->guid, d, 24, 8);\
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SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
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SQUASHFS_SWAP((s)->inode_number, d, 64, 32);
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#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\
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SQUASHFS_SWAP_START\
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SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
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}
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#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\
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SQUASHFS_SWAP_START\
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SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
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sizeof(struct squashfs_ipc_inode_header))\
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SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
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}
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#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\
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SQUASHFS_SWAP_START\
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SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
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sizeof(struct squashfs_dev_inode_header)); \
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SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
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SQUASHFS_SWAP((s)->rdev, d, 128, 16);\
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}
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#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\
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SQUASHFS_SWAP_START\
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SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
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sizeof(struct squashfs_symlink_inode_header));\
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SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
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SQUASHFS_SWAP((s)->symlink_size, d, 128, 16);\
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}
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#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\
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SQUASHFS_SWAP_START\
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SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
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sizeof(struct squashfs_reg_inode_header));\
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SQUASHFS_SWAP((s)->start_block, d, 96, 64);\
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SQUASHFS_SWAP((s)->fragment, d, 160, 32);\
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SQUASHFS_SWAP((s)->offset, d, 192, 32);\
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SQUASHFS_SWAP((s)->file_size, d, 224, 32);\
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}
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#define SQUASHFS_SWAP_LREG_INODE_HEADER(s, d) {\
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SQUASHFS_SWAP_START\
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SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
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sizeof(struct squashfs_lreg_inode_header));\
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SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
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SQUASHFS_SWAP((s)->start_block, d, 128, 64);\
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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) *\
|
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sizeof(int))
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#endif
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#ifdef __KERNEL__
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/*
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* macros used to swap each structure entry, taking into account
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* bitfields and different bitfield placing conventions on differing
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* architectures
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*/
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#include <asm/byteorder.h>
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#ifdef __BIG_ENDIAN
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/* convert from little endian to big endian */
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#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
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tbits, b_pos)
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#else
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/* convert from big endian to little endian */
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#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
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tbits, 64 - tbits - b_pos)
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#endif
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#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\
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b_pos = pos % 8;\
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val = 0;\
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s = (unsigned char *)p + (pos / 8);\
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d = ((unsigned char *) &val) + 7;\
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for(bits = 0; bits < (tbits + b_pos); bits += 8) \
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*d-- = *s++;\
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value = (val >> (SHIFT))/* & ((1 << tbits) - 1)*/;\
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}
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#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n);
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#endif
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#endif
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