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 * 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 Public
 * License.
 * %End-Header%

#ifndef _EXT2FS_EXT2FS_H
#define _EXT2FS_EXT2FS_H

#ifdef __GNUC__
#define EXT2FS_ATTR(x) __attribute__(x)
#define EXT2FS_ATTR(x)

#ifdef __cplusplus
extern "C" {

 * Non-GNU C compilers won't necessarily understand inline
#if (!defined(__GNUC__) && !defined(__WATCOMC__))

 * Build in support for byte-swapping filesystems if we the feature
 * has been configured or if we're being built on a CPU architecture
 * with a non-native byte order.
#if defined(ENABLE_SWAPFS) || defined(WORDS_BIGENDIAN)

 * 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.

#include <sys/types.h>

#include <stdio.h>
#include <stdlib.h>

#include "e2_types.h"
#include "ext2_fs.h"
#include <ext2fs/ext2_types.h>
#include <ext2fs/ext2_fs.h>
#endif /* EXT2_FLAT_INCLUDES */

typedef __u32           ext2_ino_t;
typedef __u32           blk_t;
typedef __u32           dgrp_t;
typedef __u32           ext2_off_t;
typedef __s64           e2_blkcnt_t;
typedef __u32           ext2_dirhash_t;

#include "com_err.h"
#include "ext2_io.h"
#include "ext2_err.h"
#include <et/com_err.h>
#include <ext2fs/ext2_io.h>
#include <ext2fs/ext2_err.h>

 * Portability help for Microsoft Visual C++
#ifdef _MSC_VER
#define EXT2_QSORT_TYPE int __cdecl
#define EXT2_QSORT_TYPE int

typedef struct struct_ext2_filsys *ext2_filsys;

struct ext2fs_struct_generic_bitmap {
      errcode_t   magic;
      ext2_filsys       fs;
      __u32       start, end;
      __u32       real_end;
      char  *     description;
      char  *     bitmap;
      errcode_t   base_error_code;
      __u32       reserved[7];

#define EXT2FS_MARK_ERROR     0
#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_INODE_SIZE(s)    sizeof(struct ext2_inode)

 * 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;


 * ext2_dblist structure and abstractions (see dblist.c)
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_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

 * 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
 * EXT2_MKJOURNAL_V1_SUPER    Make a (deprecated) V1 journal superblock
#define EXT2_MKJOURNAL_V1_SUPER     0x0000001

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 ext2_group_desc *      group_desc;
      int                     inode_blocks_per_group;
      ext2fs_inode_bitmap           inode_map;
      ext2fs_block_bitmap           block_map;
      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;
       * Reserved for future expansion
      __u32                   reserved[8];

       * Reserved for the use of the calling application.
      void *                        priv_data;

       * Inode cache
      struct ext2_inode_cache       *icache;
      io_channel              image_io;

#include "e2_bitops.h"
#include <ext2fs/bitops.h>

 * 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_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_NO_LARGE is for internal use only.  It informs
 * ext2fs_block_iterate2 that large files won't be accepted.
#define BLOCK_FLAG_APPEND     1
#define BLOCK_FLAG_HOLE       1

#define BLOCK_FLAG_NO_LARGE   0x1000

 * Magic "block count" return values for the block iterator function.
#define BLOCK_COUNT_IND       (-1)
#define BLOCK_COUNT_DIND      (-2)
#define BLOCK_COUNT_TIND      (-3)
#define BLOCK_COUNT_TRANSLATOR      (-4)

#if 0
 * Flags for ext2fs_move_blocks
#define EXT2_BMOVE_GET_DBLIST 0x0001      
#define EXT2_BMOVE_DEBUG      0x0002

 * Flags for directory block reading and writing functions
#define EXT2_DIRBLOCK_V2_STRUCT     0x0001

 * Return flags for the directory iterator functions
#define DIRENT_ABORT    2
#define DIRENT_ERROR    3

 * Directory iterator flags


#define DIRENT_DOT_FILE       1
#define DIRENT_OTHER_FILE     3

 * Inode scan definitions
typedef struct ext2_struct_inode_scan *ext2_inode_scan;

 * ext2fs_scan flags
#define EXT2_SF_CHK_BADBLOCKS 0x0001
#define EXT2_SF_BAD_INODE_BLK 0x0002
#define EXT2_SF_BAD_EXTRA_BYTES     0x0004

 * ext2fs_check_if_mounted flags
#define EXT2_MF_MOUNTED       1
#define EXT2_MF_ISROOT        2
#define EXT2_MF_READONLY      4
#define EXT2_MF_SWAP          8

 * Ext2/linux mode flags.  We define them here so that we don't need
 * to depend on the OS's sys/stat.h, since we may be compiling on a
 * non-Linux system.
#define LINUX_S_IFMT  00170000
#define LINUX_S_IFSOCK 0140000
#define LINUX_S_IFLNK    0120000
#define LINUX_S_IFREG  0100000
#define LINUX_S_IFBLK  0060000
#define LINUX_S_IFDIR  0040000
#define LINUX_S_IFCHR  0020000
#define LINUX_S_IFIFO  0010000
#define LINUX_S_ISUID  0004000
#define LINUX_S_ISGID  0002000
#define LINUX_S_ISVTX  0001000

#define LINUX_S_IRWXU 00700
#define LINUX_S_IRUSR 00400
#define LINUX_S_IWUSR 00200
#define LINUX_S_IXUSR 00100

#define LINUX_S_IRWXG 00070
#define LINUX_S_IRGRP 00040
#define LINUX_S_IWGRP 00020
#define LINUX_S_IXGRP 00010

#define LINUX_S_IRWXO 00007
#define LINUX_S_IROTH 00004
#define LINUX_S_IWOTH 00002
#define LINUX_S_IXOTH 00001

#define LINUX_S_ISLNK(m)      (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK)
#define LINUX_S_ISREG(m)      (((m) & LINUX_S_IFMT) == LINUX_S_IFREG)
#define LINUX_S_ISDIR(m)      (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR)
#define LINUX_S_ISCHR(m)      (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR)
#define LINUX_S_ISBLK(m)      (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK)
#define LINUX_S_ISFIFO(m)     (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO)
#define LINUX_S_ISSOCK(m)     (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK)

 * ext2 size of an inode
#define EXT2_I_SIZE(i)  ((i)->i_size | ((__u64) (i)->i_size_high << 32))

 * ext2_icount_t abstraction

typedef struct ext2_icount *ext2_icount_t;

 * Flags for ext2fs_bmap
#define BMAP_ALLOC      0x0001
#define BMAP_SET  0x0002

 * Flags for imager.c functions

 * For checking structure magic numbers...

#define EXT2_CHECK_MAGIC(struct, code) \
        if ((struct)->magic != (code)) return (code)

 * For ext2 compression support
#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff)
#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR)

 * Features supported by this version of the library

/* This #ifdef is temporary until compression is fully supported */
/* If the below warning bugs you, then have
   environment at configure time. */
 #warning "Compression support is experimental"
 * function prototypes

/* alloc.c */
extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode,
                          ext2fs_inode_bitmap map, ext2_ino_t *ret);
extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
                          ext2fs_block_bitmap map, blk_t *ret);
extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start,
                              blk_t finish, int num,
                              ext2fs_block_bitmap map,
                              blk_t *ret);
extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
                            char *block_buf, blk_t *ret);

/* alloc_sb.c */
extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs, 
                              dgrp_t group,
                              ext2fs_block_bitmap bmap);

/* alloc_stats.c */
void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse);
void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
                         int inuse, int isdir);
void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse);

/* alloc_tables.c */
extern errcode_t ext2fs_allocate_tables(ext2_filsys fs);
extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
                                   ext2fs_block_bitmap bmap);

/* badblocks.c */
extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size);
extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk);
extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk);
extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk);
extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb,
                                     ext2_u32_iterate *ret);
extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk);
extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter);
extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest);
extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2);

extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret,
                                  int size);
extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb,
                                 blk_t blk);
extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb,
                            blk_t blk);
extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk);
extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk);
extern errcode_t
      ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
                                  ext2_badblocks_iterate *ret);
extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter,
                               blk_t *blk);
extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter);
extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
                               ext2_badblocks_list *dest);
extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1,
                          ext2_badblocks_list bb2);
extern int ext2fs_u32_list_count(ext2_u32_list bb);

/* bb_compat */
extern errcode_t badblocks_list_create(badblocks_list *ret, int size);
extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk);
extern int badblocks_list_test(badblocks_list bb, blk_t blk);
extern errcode_t badblocks_list_iterate_begin(badblocks_list bb,
                                    badblocks_iterate *ret);
extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk);
extern void badblocks_list_iterate_end(badblocks_iterate iter);
extern void badblocks_list_free(badblocks_list bb);

/* bb_inode.c */
extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs,
                              ext2_badblocks_list bb_list);

/* bitmaps.c */
extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs);
extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs);
extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs);
extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs);
extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start,
                                    __u32 end,
                                    __u32 real_end,
                                    const char *descr,
                                    ext2fs_generic_bitmap *ret);
extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
                                    const char *descr,
                                    ext2fs_block_bitmap *ret);
extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
                                    const char *descr,
                                    ext2fs_inode_bitmap *ret);
extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
                                     ext2_ino_t end, ext2_ino_t *oend);
extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
                                     blk_t end, blk_t *oend);
extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap);
extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap);
extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs);
extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs);

/* block.c */
extern errcode_t ext2fs_block_iterate(ext2_filsys fs,
                              ext2_ino_t  ino,
                              int   flags,
                              char *block_buf,
                              int (*func)(ext2_filsys fs,
                                      blk_t     *blocknr,
                                      int blockcnt,
                                      void      *priv_data),
                              void *priv_data);
errcode_t ext2fs_block_iterate2(ext2_filsys fs,
                        ext2_ino_t  ino,
                        int   flags,
                        char *block_buf,
                        int (*func)(ext2_filsys fs,
                                  blk_t   *blocknr,
                                  e2_blkcnt_t   blockcnt,
                                  blk_t   ref_blk,
                                  int           ref_offset,
                                  void    *priv_data),
                        void *priv_data);

/* bmap.c */
extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino,
                       struct ext2_inode *inode, 
                       char *block_buf, int bmap_flags,
                       blk_t block, blk_t *phys_blk);

#if 0
/* bmove.c */
extern errcode_t ext2fs_move_blocks(ext2_filsys fs,
                            ext2fs_block_bitmap reserve,
                            ext2fs_block_bitmap alloc_map,
                            int flags);

/* check_desc.c */
extern errcode_t ext2fs_check_desc(ext2_filsys fs);

/* closefs.c */
extern errcode_t ext2fs_close(ext2_filsys fs);
extern errcode_t ext2fs_flush(ext2_filsys fs);
extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block);
extern int ext2fs_super_and_bgd_loc(ext2_filsys fs, 
                            dgrp_t group,
                            blk_t *ret_super_blk,
                            blk_t *ret_old_desc_blk,
                            blk_t *ret_new_desc_blk,
                            int *ret_meta_bg);
extern void ext2fs_update_dynamic_rev(ext2_filsys fs);

/* cmp_bitmaps.c */
extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
                                   ext2fs_block_bitmap bm2);
extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
                                   ext2fs_inode_bitmap bm2);

/* dblist.c */

extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs);
extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist);
extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino,
                              blk_t blk, int blockcnt);
extern void ext2fs_dblist_sort(ext2_dblist dblist,
                         EXT2_QSORT_TYPE (*sortfunc)(const void *,
                                             const void *));
extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist,
      int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info,
                void    *priv_data),
       void *priv_data);
extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino,
                              blk_t blk, int blockcnt);
extern errcode_t ext2fs_copy_dblist(ext2_dblist src,
                            ext2_dblist *dest);
extern int ext2fs_dblist_count(ext2_dblist dblist);

/* dblist_dir.c */
extern errcode_t
      ext2fs_dblist_dir_iterate(ext2_dblist dblist,
                          int flags,
                          char      *block_buf,
                          int (*func)(ext2_ino_t      dir,
                                    int         entry,
                                    struct ext2_dir_entry *dirent,
                                    int   offset,
                                    int   blocksize,
                                    char  *buf,
                                    void  *priv_data),
                          void *priv_data);

/* dirblock.c */
extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
                               void *buf);
extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
                              void *buf, int flags);
extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
                              void *buf);
extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
                               void *buf, int flags);

/* dirhash.c */
extern errcode_t ext2fs_dirhash(int version, const char *name, int len,
                        const __u32 *seed,
                        ext2_dirhash_t *ret_hash,
                        ext2_dirhash_t *ret_minor_hash);

/* dir_iterate.c */
extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 
                        ext2_ino_t dir,
                        int flags,
                        char *block_buf,
                        int (*func)(struct ext2_dir_entry *dirent,
                                int offset,
                                int blocksize,
                                char      *buf,
                                void      *priv_data),
                        void *priv_data);
extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs, 
                        ext2_ino_t dir,
                        int flags,
                        char *block_buf,
                        int (*func)(ext2_ino_t  dir,
                                int entry,
                                struct ext2_dir_entry *dirent,
                                int offset,
                                int blocksize,
                                char      *buf,
                                void      *priv_data),
                        void *priv_data);

/* dupfs.c */
extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest);

/* expanddir.c */
extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir);

/* ext_attr.c */
extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf);
extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block,
                               void *buf);
extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,
                                 char *block_buf,
                                 int adjust, __u32 *newcount);

/* fileio.c */
extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino,
                           struct ext2_inode *inode,
                           int flags, ext2_file_t *ret);
extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino,
                          int flags, ext2_file_t *ret);
extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file);
extern errcode_t ext2fs_file_close(ext2_file_t file);
extern errcode_t ext2fs_file_flush(ext2_file_t file);
extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf,
                          unsigned int wanted, unsigned int *got);
extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf,
                           unsigned int nbytes, unsigned int *written);
extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset,
                           int whence, __u64 *ret_pos);
extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset,
                           int whence, ext2_off_t *ret_pos);
errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size);
extern ext2_off_t ext2fs_file_get_size(ext2_file_t file);
extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size);

/* finddev.c */
extern char *ext2fs_find_block_device(dev_t device);

/* flushb.c */
extern errcode_t ext2fs_sync_device(int fd, int flushb);

/* freefs.c */
extern void ext2fs_free(ext2_filsys fs);
extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap);
extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap);
extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap);
extern void ext2fs_free_dblist(ext2_dblist dblist);
extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb);
extern void ext2fs_u32_list_free(ext2_u32_list bb);

/* getsize.c */
extern errcode_t ext2fs_get_device_size(const char *file, int blocksize,
                              blk_t *retblocks);

/* getsectsize.c */
errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize);

/* imager.c */
extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags);
extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags);
extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags);
extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags);
extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags);
extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags);

/* ind_block.c */
errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf);
errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf);

/* initialize.c */
extern errcode_t ext2fs_initialize(const char *name, int flags,
                           struct ext2_super_block *param,
                           io_manager manager, ext2_filsys *ret_fs);

/* icount.c */
extern void ext2fs_free_icount(ext2_icount_t icount);
extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, 
                               unsigned int size,
                               ext2_icount_t hint, ext2_icount_t *ret);
extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, 
                              unsigned int size,
                              ext2_icount_t *ret);
extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino,
                             __u16 *ret);
extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino,
                               __u16 *ret);
extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino,
                               __u16 *ret);
extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino,
                             __u16 count);
extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount);
errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *);

/* inode.c */
extern errcode_t ext2fs_flush_icache(ext2_filsys fs);
extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan, 
                                  ext2_ino_t *ino,
                                  struct ext2_inode *inode, 
                                  int bufsize);
extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks,
                          ext2_inode_scan *ret_scan);
extern void ext2fs_close_inode_scan(ext2_inode_scan scan);
extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino,
                         struct ext2_inode *inode);
extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan,
                                       int      group);
extern void ext2fs_set_inode_callback
      (ext2_inode_scan scan,
       errcode_t (*done_group)(ext2_filsys fs,
                         ext2_inode_scan scan,
                         dgrp_t group,
                         void * priv_data),
       void *done_group_data);
extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags,
                           int clear_flags);
extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
                              struct ext2_inode * inode, 
                              int bufsize);
extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino,
                      struct ext2_inode * inode);
extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
                               struct ext2_inode * inode, 
                               int bufsize);
extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino,
                      struct ext2_inode * inode);
extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino,
                      struct ext2_inode * inode);
extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino);

/* inode_io.c */
extern io_manager inode_io_manager;
extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino, 
                              char **name);
extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino,
                               struct ext2_inode *inode,
                               char **name);
/* ismounted.c */
extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags);
extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
                                char *mtpt, int mtlen);

/* namei.c */
extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name,
                   int namelen, char *buf, ext2_ino_t *inode);
extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
                  const char *name, ext2_ino_t *inode);
errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
                        const char *name, ext2_ino_t *inode);
extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
                  ext2_ino_t inode, ext2_ino_t *res_inode);

/* native.c */
int ext2fs_native_flag(void);

/* newdir.c */
extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
                        ext2_ino_t parent_ino, char **block);

/* mkdir.c */
extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
                        const char *name);

/* mkjournal.c */
extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
                                      __u32 size, int flags,
                                      char  **ret_jsb);
extern errcode_t ext2fs_add_journal_device(ext2_filsys fs,
                                 ext2_filsys journal_dev);
extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size,
                                int flags);

/* openfs.c */
extern errcode_t ext2fs_open(const char *name, int flags, int superblock,
                       unsigned int block_size, io_manager manager,
                       ext2_filsys *ret_fs);
extern errcode_t ext2fs_open2(const char *name, const char *io_options, 
                        int flags, int superblock, 
                        unsigned int block_size, io_manager manager,
                        ext2_filsys *ret_fs);
extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, 
                               dgrp_t i);
errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io);
errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io);
errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io);

/* get_pathname.c */
extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
                         char **name);

/* link.c */
errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name,
                  ext2_ino_t ino, int flags);
errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name,
                  ext2_ino_t ino, int flags);

/* read_bb.c */
extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs,
                              ext2_badblocks_list *bb_list);

/* read_bb_file.c */
extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 
                              ext2_badblocks_list *bb_list,
                              void *priv_data,
                              void (*invalid)(ext2_filsys fs,
                                          blk_t blk,
                                          char *badstr,
                                          void *priv_data));
extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 
                             ext2_badblocks_list *bb_list,
                             void (*invalid)(ext2_filsys fs,
                                         blk_t blk));

/* res_gdt.c */
extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs);

/* rs_bitmap.c */
extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end,
                                    __u32 new_real_end,
                                    ext2fs_generic_bitmap bmap);
extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
                                  ext2fs_inode_bitmap bmap);
extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
                                  ext2fs_block_bitmap bmap);
extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
                            ext2fs_generic_bitmap *dest);

/* swapfs.c */
extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize, 
                         int has_header);
extern void ext2fs_swap_super(struct ext2_super_block * super);
extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp);
extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
                           struct ext2_inode_large *f, int hostorder,
                           int bufsize);
extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t,
                        struct ext2_inode *f, int hostorder);

/* valid_blk.c */
extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode);

/* version.c */
extern int ext2fs_parse_version_string(const char *ver_string);
extern int ext2fs_get_library_version(const char **ver_string,
                              const char **date_string);

/* write_bb_file.c */
extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list,
                              unsigned int flags,
                              FILE *f);

/* inline functions */
extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr);
extern errcode_t ext2fs_free_mem(void *ptr);
extern errcode_t ext2fs_resize_mem(unsigned long old_size,
                           unsigned long size, void *ptr);
extern void ext2fs_mark_super_dirty(ext2_filsys fs);
extern void ext2fs_mark_changed(ext2_filsys fs);
extern int ext2fs_test_changed(ext2_filsys fs);
extern void ext2fs_mark_valid(ext2_filsys fs);
extern void ext2fs_unmark_valid(ext2_filsys fs);
extern int ext2fs_test_valid(ext2_filsys fs);
extern void ext2fs_mark_ib_dirty(ext2_filsys fs);
extern void ext2fs_mark_bb_dirty(ext2_filsys fs);
extern int ext2fs_test_ib_dirty(ext2_filsys fs);
extern int ext2fs_test_bb_dirty(ext2_filsys fs);
extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk);
extern int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino);
extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
                              struct ext2_inode *inode);

 * The actual inlined functions definitions themselves...
 * If NO_INLINE_FUNCS is defined, then we won't try to do inline
 * functions at all!
#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
#define _INLINE_ extern
#ifdef __GNUC__
#define _INLINE_ extern __inline__
#else                   /* For Watcom C */
#define _INLINE_ extern inline

 *  Allocate memory
_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
      void **pp = (void **)ptr;

      *pp = malloc(size);
      if (!*pp)
            return EXT2_ET_NO_MEMORY;
      return 0;

 * Free memory
_INLINE_ errcode_t ext2fs_free_mem(void *ptr)
      void **pp = (void **)ptr;

      *pp = 0;
      return 0;
 *  Resize memory
_INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
                             unsigned long size, void *ptr)
      void *p;
      void **pp = (void **)ptr;

      p = realloc(*pp, size);
      if (!p)
            return EXT2_ET_NO_MEMORY;
      *pp = p;
      return 0;
#endif      /* Custom memory routines */

 * Mark a filesystem superblock as dirty
_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs)
      fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED;

 * Mark a filesystem as changed
_INLINE_ void ext2fs_mark_changed(ext2_filsys fs)
      fs->flags |= EXT2_FLAG_CHANGED;

 * Check to see if a filesystem has changed
_INLINE_ int ext2fs_test_changed(ext2_filsys fs)
      return (fs->flags & EXT2_FLAG_CHANGED);

 * Mark a filesystem as valid
_INLINE_ void ext2fs_mark_valid(ext2_filsys fs)
      fs->flags |= EXT2_FLAG_VALID;

 * Mark a filesystem as NOT valid
_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs)
      fs->flags &= ~EXT2_FLAG_VALID;

 * Check to see if a filesystem is valid
_INLINE_ int ext2fs_test_valid(ext2_filsys fs)
      return (fs->flags & EXT2_FLAG_VALID);

 * Mark the inode bitmap as dirty
_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs)
      fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED;

 * Mark the block bitmap as dirty
_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs)
      fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED;

 * Check to see if a filesystem's inode bitmap is dirty
_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs)
      return (fs->flags & EXT2_FLAG_IB_DIRTY);

 * Check to see if a filesystem's block bitmap is dirty
_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs)
      return (fs->flags & EXT2_FLAG_BB_DIRTY);

 * Return the group # of a block
_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
      return (blk - fs->super->s_first_data_block) /

 * Return the group # of an inode number
_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
      return (ino - 1) / fs->super->s_inodes_per_group;

_INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
                              struct ext2_inode *inode)
       return inode->i_blocks -
              (inode->i_file_acl ? fs->blocksize >> 9 : 0);
#undef _INLINE_

#ifdef __cplusplus

#endif /* _EXT2FS_EXT2FS_H */

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