| #ifndef SQUASHFS_FS | |
| #define SQUASHFS_FS | |
| /* | |
| * Squashfs | |
| * | |
| * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008 | |
| * Phillip Lougher <phillip@squashfs.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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
| * | |
| * squashfs_fs.h | |
| */ | |
| #define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE | |
| #define SQUASHFS_MAJOR 4 | |
| #define SQUASHFS_MINOR 0 | |
| #define SQUASHFS_START 0 | |
| /* size of metadata (inode and directory) blocks */ | |
| #define SQUASHFS_METADATA_SIZE 8192 | |
| /* default size of block device I/O */ | |
| #ifdef CONFIG_SQUASHFS_4K_DEVBLK_SIZE | |
| #define SQUASHFS_DEVBLK_SIZE 4096 | |
| #else | |
| #define SQUASHFS_DEVBLK_SIZE 1024 | |
| #endif | |
| #define SQUASHFS_FILE_MAX_SIZE 1048576 | |
| #define SQUASHFS_FILE_MAX_LOG 20 | |
| /* Max length of filename (not 255) */ | |
| #define SQUASHFS_NAME_LEN 256 | |
| /* Max value for directory header count*/ | |
| #define SQUASHFS_DIR_COUNT 256 | |
| #define SQUASHFS_INVALID_FRAG (0xffffffffU) | |
| #define SQUASHFS_INVALID_XATTR (0xffffffffU) | |
| #define SQUASHFS_INVALID_BLK (-1LL) | |
| /* Filesystem flags */ | |
| #define SQUASHFS_NOI 0 | |
| #define SQUASHFS_NOD 1 | |
| #define SQUASHFS_NOF 3 | |
| #define SQUASHFS_NO_FRAG 4 | |
| #define SQUASHFS_ALWAYS_FRAG 5 | |
| #define SQUASHFS_DUPLICATE 6 | |
| #define SQUASHFS_EXPORT 7 | |
| #define SQUASHFS_COMP_OPT 10 | |
| #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_COMP_OPTS(flags) SQUASHFS_BIT(flags, \ | |
| SQUASHFS_COMP_OPT) | |
| /* Inode types including extended types */ | |
| #define SQUASHFS_DIR_TYPE 1 | |
| #define SQUASHFS_REG_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 | |
| #define SQUASHFS_LSYMLINK_TYPE 10 | |
| #define SQUASHFS_LBLKDEV_TYPE 11 | |
| #define SQUASHFS_LCHRDEV_TYPE 12 | |
| #define SQUASHFS_LFIFO_TYPE 13 | |
| #define SQUASHFS_LSOCKET_TYPE 14 | |
| /* Max type value stored in directory entry */ | |
| #define SQUASHFS_MAX_DIR_TYPE 7 | |
| /* Xattr types */ | |
| #define SQUASHFS_XATTR_USER 0 | |
| #define SQUASHFS_XATTR_TRUSTED 1 | |
| #define SQUASHFS_XATTR_SECURITY 2 | |
| #define SQUASHFS_XATTR_VALUE_OOL 256 | |
| #define SQUASHFS_XATTR_PREFIX_MASK 0xff | |
| /* 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) ((long long)(((long long) (A)\ | |
| << 16) + (B))) | |
| /* 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(u64)) | |
| /* inode lookup table defines */ | |
| #define SQUASHFS_LOOKUP_BYTES(A) ((A) * sizeof(u64)) | |
| #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(u64)) | |
| /* uid/gid lookup table defines */ | |
| #define SQUASHFS_ID_BYTES(A) ((A) * sizeof(unsigned int)) | |
| #define SQUASHFS_ID_BLOCK(A) (SQUASHFS_ID_BYTES(A) / \ | |
| SQUASHFS_METADATA_SIZE) | |
| #define SQUASHFS_ID_BLOCK_OFFSET(A) (SQUASHFS_ID_BYTES(A) % \ | |
| SQUASHFS_METADATA_SIZE) | |
| #define SQUASHFS_ID_BLOCKS(A) ((SQUASHFS_ID_BYTES(A) + \ | |
| SQUASHFS_METADATA_SIZE - 1) / \ | |
| SQUASHFS_METADATA_SIZE) | |
| #define SQUASHFS_ID_BLOCK_BYTES(A) (SQUASHFS_ID_BLOCKS(A) *\ | |
| sizeof(u64)) | |
| /* xattr id lookup table defines */ | |
| #define SQUASHFS_XATTR_BYTES(A) ((A) * sizeof(struct squashfs_xattr_id)) | |
| #define SQUASHFS_XATTR_BLOCK(A) (SQUASHFS_XATTR_BYTES(A) / \ | |
| SQUASHFS_METADATA_SIZE) | |
| #define SQUASHFS_XATTR_BLOCK_OFFSET(A) (SQUASHFS_XATTR_BYTES(A) % \ | |
| SQUASHFS_METADATA_SIZE) | |
| #define SQUASHFS_XATTR_BLOCKS(A) ((SQUASHFS_XATTR_BYTES(A) + \ | |
| SQUASHFS_METADATA_SIZE - 1) / \ | |
| SQUASHFS_METADATA_SIZE) | |
| #define SQUASHFS_XATTR_BLOCK_BYTES(A) (SQUASHFS_XATTR_BLOCKS(A) *\ | |
| sizeof(u64)) | |
| #define SQUASHFS_XATTR_BLK(A) ((unsigned int) ((A) >> 16)) | |
| #define SQUASHFS_XATTR_OFFSET(A) ((unsigned int) ((A) & 0xffff)) | |
| /* cached data constants for filesystem */ | |
| #define SQUASHFS_CACHED_BLKS 8 | |
| /* meta index cache */ | |
| #define SQUASHFS_META_INDEXES (SQUASHFS_METADATA_SIZE / sizeof(unsigned int)) | |
| #define SQUASHFS_META_ENTRIES 127 | |
| #define SQUASHFS_META_SLOTS 8 | |
| struct meta_entry { | |
| u64 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 | |
| */ | |
| #define ZLIB_COMPRESSION 1 | |
| #define LZMA_COMPRESSION 2 | |
| #define LZO_COMPRESSION 3 | |
| #define XZ_COMPRESSION 4 | |
| #define LZ4_COMPRESSION 5 | |
| #define ZSTD_COMPRESSION 6 | |
| struct squashfs_super_block { | |
| __le32 s_magic; | |
| __le32 inodes; | |
| __le32 mkfs_time; | |
| __le32 block_size; | |
| __le32 fragments; | |
| __le16 compression; | |
| __le16 block_log; | |
| __le16 flags; | |
| __le16 no_ids; | |
| __le16 s_major; | |
| __le16 s_minor; | |
| __le64 root_inode; | |
| __le64 bytes_used; | |
| __le64 id_table_start; | |
| __le64 xattr_id_table_start; | |
| __le64 inode_table_start; | |
| __le64 directory_table_start; | |
| __le64 fragment_table_start; | |
| __le64 lookup_table_start; | |
| }; | |
| struct squashfs_dir_index { | |
| __le32 index; | |
| __le32 start_block; | |
| __le32 size; | |
| unsigned char name[0]; | |
| }; | |
| struct squashfs_base_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| }; | |
| struct squashfs_ipc_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| __le32 nlink; | |
| }; | |
| struct squashfs_lipc_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| __le32 nlink; | |
| __le32 xattr; | |
| }; | |
| struct squashfs_dev_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| __le32 nlink; | |
| __le32 rdev; | |
| }; | |
| struct squashfs_ldev_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| __le32 nlink; | |
| __le32 rdev; | |
| __le32 xattr; | |
| }; | |
| struct squashfs_symlink_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| __le32 nlink; | |
| __le32 symlink_size; | |
| char symlink[0]; | |
| }; | |
| struct squashfs_reg_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| __le32 start_block; | |
| __le32 fragment; | |
| __le32 offset; | |
| __le32 file_size; | |
| __le16 block_list[0]; | |
| }; | |
| struct squashfs_lreg_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| __le64 start_block; | |
| __le64 file_size; | |
| __le64 sparse; | |
| __le32 nlink; | |
| __le32 fragment; | |
| __le32 offset; | |
| __le32 xattr; | |
| __le16 block_list[0]; | |
| }; | |
| struct squashfs_dir_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| __le32 start_block; | |
| __le32 nlink; | |
| __le16 file_size; | |
| __le16 offset; | |
| __le32 parent_inode; | |
| }; | |
| struct squashfs_ldir_inode { | |
| __le16 inode_type; | |
| __le16 mode; | |
| __le16 uid; | |
| __le16 guid; | |
| __le32 mtime; | |
| __le32 inode_number; | |
| __le32 nlink; | |
| __le32 file_size; | |
| __le32 start_block; | |
| __le32 parent_inode; | |
| __le16 i_count; | |
| __le16 offset; | |
| __le32 xattr; | |
| struct squashfs_dir_index index[0]; | |
| }; | |
| union squashfs_inode { | |
| struct squashfs_base_inode base; | |
| struct squashfs_dev_inode dev; | |
| struct squashfs_ldev_inode ldev; | |
| struct squashfs_symlink_inode symlink; | |
| struct squashfs_reg_inode reg; | |
| struct squashfs_lreg_inode lreg; | |
| struct squashfs_dir_inode dir; | |
| struct squashfs_ldir_inode ldir; | |
| struct squashfs_ipc_inode ipc; | |
| struct squashfs_lipc_inode lipc; | |
| }; | |
| struct squashfs_dir_entry { | |
| __le16 offset; | |
| __le16 inode_number; | |
| __le16 type; | |
| __le16 size; | |
| char name[0]; | |
| }; | |
| struct squashfs_dir_header { | |
| __le32 count; | |
| __le32 start_block; | |
| __le32 inode_number; | |
| }; | |
| struct squashfs_fragment_entry { | |
| __le64 start_block; | |
| __le32 size; | |
| unsigned int unused; | |
| }; | |
| struct squashfs_xattr_entry { | |
| __le16 type; | |
| __le16 size; | |
| char data[0]; | |
| }; | |
| struct squashfs_xattr_val { | |
| __le32 vsize; | |
| char value[0]; | |
| }; | |
| struct squashfs_xattr_id { | |
| __le64 xattr; | |
| __le32 count; | |
| __le32 size; | |
| }; | |
| struct squashfs_xattr_id_table { | |
| __le64 xattr_table_start; | |
| __le32 xattr_ids; | |
| __le32 unused; | |
| }; | |
| #endif |