mkfs工具等e2fsprogs

/* * ext2fs.h --- ext2fs * * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o. * * %Begin-Header% * This file may be redistributed under the terms of the GNU Library * General Public License, version 2. * %End-Header% */ #ifndef _EXT2FS_EXT2FS_H #define _EXT2FS_EXT2FS_H #ifdef __GNUC__ #define EXT2FS_ATTR(x) __attribute__(x) #else #define EXT2FS_ATTR(x) #endif #ifdef __cplusplus extern "C" { #endif /* * Non-GNU C compilers won't necessarily understand inline */ #if (!defined(__GNUC__) && !defined(__WATCOMC__)) #define NO_INLINE_FUNCS #endif /* * Where the master copy of the superblock is located, and how big * superblocks are supposed to be. We define SUPERBLOCK_SIZE because * the size of the superblock structure is not necessarily trustworthy * (some versions have the padding set up so that the superblock is * 1032 bytes long). */ #define SUPERBLOCK_OFFSET 1024 #define SUPERBLOCK_SIZE 1024 /* * The last ext2fs revision level that this version of the library is * able to support. */ #define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV #ifdef HAVE_SYS_TYPES_H #include <sys/types.h> #endif #include <stdio.h> #include <stdlib.h> #include <string.h> #include <errno.h> #if EXT2_FLAT_INCLUDES #include "e2_types.h" #include "ext2_fs.h" #include "ext3_extents.h" #else #include <ext2fs/ext2_types.h> #include <ext2fs/ext2_fs.h> #include <ext2fs/ext3_extents.h> #endif /* EXT2_FLAT_INCLUDES */ typedef __u32 ext2_ino_t; typedef __u32 blk_t; typedef __u64 blk64_t; typedef __u32 dgrp_t; typedef __u32 ext2_off_t; typedef __u64 ext2_off64_t; typedef __s64 e2_blkcnt_t; typedef __u32 ext2_dirhash_t; #if EXT2_FLAT_INCLUDES #include "com_err.h" #include "ext2_io.h" #include "ext2_err.h" #include "ext2_ext_attr.h" #else #include <et/com_err.h> #include <ext2fs/ext2_io.h> #include <ext2fs/ext2_err.h> #include <ext2fs/ext2_ext_attr.h> #endif /* * Portability help for Microsoft Visual C++ */ #ifdef _MSC_VER #define EXT2_QSORT_TYPE int __cdecl #else #define EXT2_QSORT_TYPE int #endif typedef struct struct_ext2_filsys *ext2_filsys; #define EXT2FS_MARK_ERROR 0 #define EXT2FS_UNMARK_ERROR 1 #define EXT2FS_TEST_ERROR 2 typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap; typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap; typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap; #define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s) /* * Badblocks list definitions */ typedef struct ext2_struct_u32_list *ext2_badblocks_list; typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate; typedef struct ext2_struct_u32_list *ext2_u32_list; typedef struct ext2_struct_u32_iterate *ext2_u32_iterate; /* old */ typedef struct ext2_struct_u32_list *badblocks_list; typedef struct ext2_struct_u32_iterate *badblocks_iterate; #define BADBLOCKS_FLAG_DIRTY 1 /* * ext2_dblist structure and abstractions (see dblist.c) */ struct ext2_db_entry2 { ext2_ino_t ino; blk64_t blk; e2_blkcnt_t blockcnt; }; /* Ye Olde 32-bit version */ struct ext2_db_entry { ext2_ino_t ino; blk_t blk; int blockcnt; }; typedef struct ext2_struct_dblist *ext2_dblist; #define DBLIST_ABORT 1 /* * ext2_fileio definitions */ #define EXT2_FILE_WRITE 0x0001 #define EXT2_FILE_CREATE 0x0002 #define EXT2_FILE_MASK 0x00FF #define EXT2_FILE_BUF_DIRTY 0x4000 #define EXT2_FILE_BUF_VALID 0x2000 typedef struct ext2_file *ext2_file_t; #define EXT2_SEEK_SET 0 #define EXT2_SEEK_CUR 1 #define EXT2_SEEK_END 2 /* * Flags for the ext2_filsys structure and for ext2fs_open() */ #define EXT2_FLAG_RW 0x01 #define EXT2_FLAG_CHANGED 0x02 #define EXT2_FLAG_DIRTY 0x04 #define EXT2_FLAG_VALID 0x08 #define EXT2_FLAG_IB_DIRTY 0x10 #define EXT2_FLAG_BB_DIRTY 0x20 #define EXT2_FLAG_SWAP_BYTES 0x40 #define EXT2_FLAG_SWAP_BYTES_READ 0x80 #define EXT2_FLAG_SWAP_BYTES_WRITE 0x100 #define EXT2_FLAG_MASTER_SB_ONLY 0x200 #define EXT2_FLAG_FORCE 0x400 #define EXT2_FLAG_SUPER_ONLY 0x800 #define EXT2_FLAG_JOURNAL_DEV_OK 0x1000 #define EXT2_FLAG_IMAGE_FILE 0x2000 #define EXT2_FLAG_EXCLUSIVE 0x4000 #define EXT2_FLAG_SOFTSUPP_FEATURES 0x8000 #define EXT2_FLAG_NOFREE_ON_ERROR 0x10000 #define EXT2_FLAG_64BITS 0x20000 #define EXT2_FLAG_PRINT_PROGRESS 0x40000 #define EXT2_FLAG_DIRECT_IO 0x80000 #define EXT2_FLAG_SKIP_MMP 0x100000 #define EXT2_FLAG_IGNORE_CSUM_ERRORS 0x200000 /* * Special flag in the ext2 inode i_flag field that means that this is * a new inode. (So that ext2_write_inode() can clear extra fields.) */ #define EXT2_NEW_INODE_FL 0x80000000 /* * Flags for mkjournal */ #define EXT2_MKJOURNAL_V1_SUPER 0x0000001 /* create V1 superblock (deprecated) */ #define EXT2_MKJOURNAL_LAZYINIT 0x0000002 /* don't zero journal inode before use*/ #define EXT2_MKJOURNAL_NO_MNT_CHECK 0x0000004 /* don't check mount status */ struct opaque_ext2_group_desc; struct struct_ext2_filsys { errcode_t magic; io_channel io; int flags; char * device_name; struct ext2_super_block * super; unsigned int blocksize; int fragsize; dgrp_t group_desc_count; unsigned long desc_blocks; struct opaque_ext2_group_desc * group_desc; unsigned int inode_blocks_per_group; ext2fs_inode_bitmap inode_map; ext2fs_block_bitmap block_map; /* XXX FIXME-64: not 64-bit safe, but not used? */ errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino); errcode_t (*write_bitmaps)(ext2_filsys fs); errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino, struct ext2_inode *inode); errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino, struct ext2_inode *inode); ext2_badblocks_list badblocks; ext2_dblist dblist; __u32 stride; /* for mke2fs */ struct ext2_super_block * orig_super; struct ext2_image_hdr * image_header; __u32 umask; time_t now; int cluster_ratio_bits; __u16 default_bitmap_type; __u16 pad; /* * Reserved for future expansion */ __u32 reserved[5]; /* * Reserved for the use of the calling application. */ void * priv_data; /* * Inode cache */ struct ext2_inode_cache *icache; io_channel image_io; /* * More callback functions */ errcode_t (*get_alloc_block)(ext2_filsys fs, blk64_t goal, blk64_t *ret); void (*block_alloc_stats)(ext2_filsys fs, blk64_t blk, int inuse); /* * Buffers for Multiple mount protection(MMP) block. */ void *mmp_buf; void *mmp_cmp; int mmp_fd; /* * Time at which e2fsck last updated the MMP block. */ long mmp_last_written; /* progress operation functions */ struct ext2fs_progress_ops *progress_ops; /* Precomputed FS UUID checksum for seeding other checksums */ __u32 csum_seed; }; #if EXT2_FLAT_INCLUDES #include "e2_bitops.h" #else #include <ext2fs/bitops.h> #endif /* * 64-bit bitmap backend types */ #define EXT2FS_BMAP64_BITARRAY 1 #define EXT2FS_BMAP64_RBTREE 2 #define EXT2FS_BMAP64_AUTODIR 3 /* * Return flags for the block iterator functions */ #define BLOCK_CHANGED 1 #define BLOCK_ABORT 2 #define BLOCK_ERROR 4 /* * Block interate flags * * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator * function should be called on blocks where the block number is zero. * This is used by ext2fs_expand_dir() to be able to add a new block * to an inode. It can also be used for programs that want to be able * to deal with files that contain "holes". * * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for * the indirect, doubly indirect, etc. blocks should be called after * all of the blocks containined in the indirect blocks are processed. * This is useful if you are going to be deallocating blocks from an * inode. * * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be * called for data blocks only. * * BLOCK_FLAG_READ_ONLY is a promise by the caller that it will not * modify returned block number. * * BLOCK_FLAG_NO_LARGE is for internal use only. It informs * ext2fs_block_