/src/e2fsprogs/lib/ext2fs/ext2fs.h

Source
/*
 * 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

#ifndef __nonstring
#ifdef __has_attribute
#if __has_attribute(__nonstring__)
#define __nonstring                    __attribute__((__nonstring__))
#else
#define __nonstring
#endif /* __has_attribute(__nonstring__) */
#else
# define __nonstring
#endif /* __has_attribute */
#endif /* __nonstring */

#ifdef CONFIG_TDB
#define EXT2FS_NO_TDB_UNUSED
#else
#define EXT2FS_NO_TDB_UNUSED  EXT2FS_ATTR((unused))
#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

#define UUID_STR_SIZE 37

/*
 * 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 <time.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 __bitwise   ext2_ino_t;
typedef __u32 __bitwise   blk_t;
typedef __u64 __bitwise   blk64_t;
typedef __u32 __bitwise   dgrp_t;
typedef __s32 __bitwise   ext2_off_t;
typedef __s64 __bitwise   ext2_off64_t;
typedef __s64 __bitwise   e2_blkcnt_t;
typedef __u32 __bitwise   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

#include "hashmap.h"

/*
 * 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

struct ext2fs_struct_generic_bitmap_base {
  errcode_t   magic;
  ext2_filsys     fs;
};

typedef struct ext2fs_struct_generic_bitmap_base *ext2fs_generic_bitmap;
typedef struct ext2fs_struct_generic_bitmap_base *ext2fs_inode_bitmap;
typedef struct ext2fs_struct_generic_bitmap_base *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
#define EXT2_FLAG_SHARE_DUP   0x400000
#define EXT2_FLAG_IGNORE_SB_ERRORS  0x800000
#define EXT2_FLAG_BBITMAP_TAIL_PROBLEM  0x1000000
#define EXT2_FLAG_IBITMAP_TAIL_PROBLEM  0x2000000
#define EXT2_FLAG_THREADS   0x4000000
#define EXT2_FLAG_IGNORE_SWAP_DIRENT  0x8000000

/*
 * Internal flags for use by the ext2fs library only
 */
#define EXT2_FLAG2_USE_FAKE_TIME  0x000000001

/*
 * 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 */

/*
 * Normal journal area size to fast commit area size ratio. This is used to
 * set default size of fast commit area.
 */
#define EXT2_JOURNAL_TO_FC_BLKS_RATIO   64

struct blk_alloc_ctx;
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;
  __u32       flags2;
  /*
   * Reserved for future expansion
   */
  __u32       reserved[4];

  /*
   * 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);
  errcode_t (*get_alloc_block2)(ext2_filsys fs, blk64_t goal,
              blk64_t *ret, struct blk_alloc_ctx *ctx);
  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;

  io_channel      journal_io;
  char        *journal_name;

  /* New block range allocation hooks */
  errcode_t (*new_range)(ext2_filsys fs, int flags, blk64_t goal,
             blk64_t len, blk64_t *pblk, blk64_t *plen);
  void (*block_alloc_stats_range)(ext2_filsys fs, blk64_t blk, blk_t num,
          int inuse);

  /* hashmap for SHA of data blocks */
  struct ext2fs_hashmap* block_sha_map;

  const struct ext2fs_nls_table *encoding;
};

#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
#define BLOCK_INLINE_DATA_CHANGED 8

/*
 * Block iterate flags
 *
 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the iterator
 * 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 contained 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_iterate2 that large files won't be accepted.
 */
#define BLOCK_FLAG_APPEND 1
#define BLOCK_FLAG_HOLE   1
#define BLOCK_FLAG_DEPTH_TRAVERSE 2
#define BLOCK_FLAG_DATA_ONLY  4
#define BLOCK_FLAG_READ_ONLY  8

#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)

#define BLOCK_ALLOC_UNKNOWN 0
#define BLOCK_ALLOC_DATA  1
#define BLOCK_ALLOC_METADATA  2

struct blk_alloc_ctx {
  ext2_ino_t    ino;
  struct ext2_inode *inode;
  blk64_t     lblk;
  int     flags;
};

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

/*
 * Generic (non-filesystem layout specific) extents structure
 */

#define EXT2_EXTENT_FLAGS_LEAF    0x0001
#define EXT2_EXTENT_FLAGS_UNINIT  0x0002
#define EXT2_EXTENT_FLAGS_SECOND_VISIT  0x0004

struct ext2fs_extent {
  blk64_t e_pblk;   /* first physical block */
  blk64_t e_lblk;   /* first logical block extent covers */
  __u32 e_len;    /* number of blocks covered by extent */
  __u32 e_flags;  /* extent flags */
};

typedef struct ext2_extent_handle *ext2_extent_handle_t;
typedef struct ext2_extent_path *ext2_extent_path_t;

/*
 * Flags used by ext2fs_extent_get()
 */
#define EXT2_EXTENT_CURRENT 0x0000
#define EXT2_EXTENT_MOVE_MASK 0x000F
#define EXT2_EXTENT_ROOT  0x0001
#define EXT2_EXTENT_LAST_LEAF 0x0002
#define EXT2_EXTENT_FIRST_SIB 0x0003
#define EXT2_EXTENT_LAST_SIB  0x0004
#define EXT2_EXTENT_NEXT_SIB  0x0005
#define EXT2_EXTENT_PREV_SIB  0x0006
#define EXT2_EXTENT_NEXT_LEAF 0x0007
#define EXT2_EXTENT_PREV_LEAF 0x0008
#define EXT2_EXTENT_NEXT  0x0009
#define EXT2_EXTENT_PREV  0x000A
#define EXT2_EXTENT_UP    0x000B
#define EXT2_EXTENT_DOWN  0x000C
#define EXT2_EXTENT_DOWN_AND_LAST 0x000D

/*
 * Flags used by ext2fs_extent_insert()
 */
#define EXT2_EXTENT_INSERT_AFTER  0x0001 /* insert after handle loc'n */
#define EXT2_EXTENT_INSERT_NOSPLIT  0x0002 /* insert may not cause split */

/*
 * Flags used by ext2fs_extent_delete()
 */
#define EXT2_EXTENT_DELETE_KEEP_EMPTY 0x001 /* keep node if last extent gone */

/*
 * Flags used by ext2fs_extent_set_bmap()
 */
#define EXT2_EXTENT_SET_BMAP_UNINIT 0x0001

/*
 * Data structure returned by ext2fs_extent_get_info()
 */
struct ext2_extent_info {
  int   curr_entry;
  int   curr_level;
  int   num_entries;
  int   max_entries;
  int   max_depth;
  int   bytes_avail;
  blk64_t   max_lblk;
  blk64_t   max_pblk;
  __u32   max_len;
  __u32   max_uninit_len;
};

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

/*
 * Return flags for the directory iterator functions
 */
#define DIRENT_CHANGED  1
#define DIRENT_ABORT  2
#define DIRENT_ERROR  3

/*
 * Directory iterator flags
 */

#define DIRENT_FLAG_INCLUDE_EMPTY 1
#define DIRENT_FLAG_INCLUDE_REMOVED 2
#define DIRENT_FLAG_INCLUDE_CSUM  4
#define DIRENT_FLAG_INCLUDE_INLINE_DATA 8

#define DIRENT_DOT_FILE   1
#define DIRENT_DOT_DOT_FILE 2
#define DIRENT_OTHER_FILE 3
#define DIRENT_DELETED_FILE 4
#define DIRENT_CHECKSUM   5

/*
 * 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
#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008
#define EXT2_SF_DO_LAZY   0x0010
#define EXT2_SF_WARN_GARBAGE_INODES 0x0020

/*
 * 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
#define EXT2_MF_BUSY    16
#define EXT2_MF_EXTFS   32

/*
 * 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))

static inline __u32 __encode_extra_time(time_t seconds EXT2FS_ATTR((unused)),
          __u32 nsec)
{
  __u32 extra = 0;

#if (SIZEOF_TIME_T > 4)
  extra = ((seconds - (__s32)(seconds & 0xffffffff)) >> 32) &
    EXT4_EPOCH_MASK;
#endif
  return extra | (nsec << EXT4_EPOCH_BITS);
}
static inline time_t __decode_extra_sec(time_t seconds,
          __u32 extra EXT2FS_ATTR((unused)))
{
#if (SIZEOF_TIME_T > 4)
  if (extra & EXT4_EPOCH_MASK)
    seconds += ((time_t)(extra & EXT4_EPOCH_MASK) << 32);
#endif
  return seconds;
}
static inline __u32 __decode_extra_nsec(__u32 extra)
{
  return (extra & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS;
}
#define ext2fs_inode_actual_size(inode)               \
  ((size_t)(EXT2_GOOD_OLD_INODE_SIZE +              \
      (sizeof(*inode) > EXT2_GOOD_OLD_INODE_SIZE ?          \
       ((struct ext2_inode_large *)(inode))->i_extra_isize : 0)))
#define clamp(val, min, max) ((val) < (min) ? (min) : ((val) > (max) ?        \
                   (max) : (val)))
#define ext2fs_inode_xtime_set(inode, field, sec)           \
do {                       \
  if (ext2fs_inode_includes(ext2fs_inode_actual_size(inode),       \
          field ## _extra)) {           \
    (inode)->field = (__u32)(sec & 0xfffffff);          \
    ((struct ext2_inode_large *)(inode))->field ## _extra =       \
      __encode_extra_time(sec, 0);            \
  } else {                   \
    (inode)->field = (__u32) clamp(sec, INT32_MIN, INT32_MAX);    \
  }                     \
} while (0)
#define ext2fs_inode_xtime_get(inode, field)              \
(ext2fs_inode_includes(ext2fs_inode_actual_size(inode), field ## _extra) ?    \
  __decode_extra_sec((inode)->field,              \
    ((struct ext2_inode_large *)(inode))->field ## _extra) :      \
    (time_t)(inode)->field)

static inline void __sb_set_tstamp(__u32 *lo, __u8 *hi EXT2FS_ATTR((unused)),
           time_t seconds)
{
  *lo = seconds & 0xffffffff;
#if (SIZEOF_TIME_T > 4)
  *hi = (seconds >> 32) & EXT4_EPOCH_MASK;
#else
  *hi = 0;
#endif
}
static inline time_t __sb_get_tstamp(__u32 *lo, __u8 *hi EXT2FS_ATTR((unused)))
{
#if (SIZEOF_TIME_T == 4)
  return *lo;
#else
  return ((time_t)(*hi) << 32) | *lo;
#endif
}
#define ext2fs_set_tstamp(sb, field, seconds) \
  __sb_set_tstamp(&(sb)->field, &(sb)->field ## _hi, seconds)
#define ext2fs_get_tstamp(sb, field) \
  __sb_get_tstamp(&(sb)->field, &(sb)->field ## _hi)

/*
 * ext2_icount_t abstraction
 */
#define EXT2_ICOUNT_OPT_INCREMENT 0x01
#define EXT2_ICOUNT_OPT_FULLMAP   0x02

typedef struct ext2_icount *ext2_icount_t;

/*
 * Flags for ext2fs_bmap
 */
#define BMAP_ALLOC  0x0001
#define BMAP_SET  0x0002
#define BMAP_UNINIT 0x0004
#define BMAP_ZERO 0x0008

/*
 * Returned flags from ext2fs_bmap
 */
#define BMAP_RET_UNINIT 0x0001

/*
 * Flags for ext2fs_read_inode2
 */
#define READ_INODE_NOCSUM 0x0001

/*
 * Flags for ext2fs_write_inode2
 */
#define WRITE_INODE_NOCSUM  0x0001

/*
 * Flags for imager.c functions
 */
#define IMAGER_FLAG_INODEMAP  1
#define IMAGER_FLAG_SPARSEWRITE 2

/*
 * For checking structure magic numbers...
 */

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

/*
 * Features supported by this version of the library
 */
#define EXT2_LIB_FEATURE_COMPAT_SUPP  (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\
           EXT2_FEATURE_COMPAT_IMAGIC_INODES|\
           EXT3_FEATURE_COMPAT_HAS_JOURNAL|\
           EXT2_FEATURE_COMPAT_RESIZE_INODE|\
           EXT2_FEATURE_COMPAT_DIR_INDEX|\
           EXT2_FEATURE_COMPAT_EXT_ATTR|\
           EXT4_FEATURE_COMPAT_SPARSE_SUPER2|\
           EXT4_FEATURE_COMPAT_FAST_COMMIT|\
           EXT4_FEATURE_COMPAT_STABLE_INODES|\
           EXT4_FEATURE_COMPAT_ORPHAN_FILE)

#ifdef CONFIG_MMP
#define EXT4_LIB_INCOMPAT_MMP   EXT4_FEATURE_INCOMPAT_MMP
#else
#define EXT4_LIB_INCOMPAT_MMP   (0)
#endif

#define EXT2_LIB_FEATURE_INCOMPAT_SUPP  (EXT2_FEATURE_INCOMPAT_FILETYPE|\
           EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\
           EXT2_FEATURE_INCOMPAT_META_BG|\
           EXT3_FEATURE_INCOMPAT_RECOVER|\
           EXT3_FEATURE_INCOMPAT_EXTENTS|\
           EXT4_FEATURE_INCOMPAT_FLEX_BG|\
           EXT4_FEATURE_INCOMPAT_EA_INODE|\
           EXT4_LIB_INCOMPAT_MMP|\
           EXT4_FEATURE_INCOMPAT_64BIT|\
           EXT4_FEATURE_INCOMPAT_INLINE_DATA|\
           EXT4_FEATURE_INCOMPAT_ENCRYPT|\
           EXT4_FEATURE_INCOMPAT_CASEFOLD|\
           EXT4_FEATURE_INCOMPAT_CSUM_SEED|\
           EXT4_FEATURE_INCOMPAT_LARGEDIR)

#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
           EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
           EXT2_FEATURE_RO_COMPAT_LARGE_FILE|\
           EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\
           EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|\
           EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\
           EXT4_FEATURE_RO_COMPAT_BIGALLOC|\
           EXT4_FEATURE_RO_COMPAT_QUOTA|\
           EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
           EXT4_FEATURE_RO_COMPAT_READONLY |\
           EXT4_FEATURE_RO_COMPAT_PROJECT |\
           EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS |\
           EXT4_FEATURE_RO_COMPAT_VERITY |\
           EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT)

/*
 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed
 * to ext2fs_openfs()
 */
#define EXT2_LIB_SOFTSUPP_INCOMPAT  (0)
#define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_REPLICA)


/* Translate a block number to a cluster number */
#define EXT2FS_CLUSTER_RATIO(fs)  (1 << (fs)->cluster_ratio_bits)
#define EXT2FS_CLUSTER_MASK(fs)   (EXT2FS_CLUSTER_RATIO(fs) - 1)
#define EXT2FS_B2C(fs, blk)   ((blk) >> (fs)->cluster_ratio_bits)
/* Translate a cluster number to a block number */
#define EXT2FS_C2B(fs, cluster)   ((cluster) << (fs)->cluster_ratio_bits)
/* Translate # of blks to # of clusters */
#define EXT2FS_NUM_B2C(fs, blks)  (((blks) + EXT2FS_CLUSTER_MASK(fs)) >> \
           (fs)->cluster_ratio_bits)

#if defined(HAVE_FSTAT64) && !defined(__OSX_AVAILABLE_BUT_DEPRECATED)
typedef struct stat64 ext2fs_struct_stat;
#else
typedef struct stat ext2fs_struct_stat;
#endif

/*
 * For ext2fs_close2() and ext2fs_flush2(), this flag allows you to
 * avoid the fsync call.
 */
#define EXT2_FLAG_FLUSH_NO_SYNC          1

/*
 * Modify and iterate extended attributes
 */
struct ext2_xattr_handle;
#define XATTR_ABORT 1
#define XATTR_CHANGED 2

/*
 * flags for ext2fs_rw_bitmaps()
 */
#define EXT2FS_BITMAPS_WRITE    0x0001
#define EXT2FS_BITMAPS_BLOCK    0x0002
#define EXT2FS_BITMAPS_INODE    0x0004
#define EXT2FS_BITMAPS_VALID_FLAGS  0x0007

/*
 * flags for ext2fs_unlink()
 */

/* Forcefully unlink even if the inode number doesn't match the dirent */
#define EXT2FS_UNLINK_FORCE   0x1

/*
 * flags for ext2fs_link()
 *
 */
#define EXT2FS_LINK_FT_MASK 0x0007
#define EXT2FS_LINK_APPEND  0x0010
#define EXT2FS_LINK_EXPAND  0x0020

/*
 * function prototypes
 */
static inline int ext2fs_has_group_desc_csum(ext2_filsys fs)
{
  return ext2fs_has_feature_metadata_csum(fs->super) ||
         ext2fs_has_feature_gdt_csum(fs->super);
}

/* The LARGE_FILE feature should be set if we have stored files 2GB+ in size */
static inline int ext2fs_needs_large_file_feature(unsigned long long file_size)
{
  return file_size >= 0x80000000ULL;
}

/* alloc.c */
extern void ext2fs_clear_block_uninit(ext2_filsys fs, dgrp_t group);
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_new_block2(ext2_filsys fs, blk64_t goal,
           ext2fs_block_bitmap map, blk64_t *ret);
extern errcode_t ext2fs_new_block3(ext2_filsys fs, blk64_t goal,
           ext2fs_block_bitmap map, blk64_t *ret,
           struct blk_alloc_ctx *ctx);
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_get_free_blocks2(ext2_filsys fs, blk64_t start,
           blk64_t finish, int num,
           ext2fs_block_bitmap map,
           blk64_t *ret);
extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
            char *block_buf, blk_t *ret);
extern errcode_t ext2fs_alloc_block2(ext2_filsys fs, blk64_t goal,
             char *block_buf, blk64_t *ret);
extern errcode_t ext2fs_alloc_block3(ext2_filsys fs, blk64_t goal,
             char *block_buf, blk64_t *ret,
             struct blk_alloc_ctx *ctx);

extern void ext2fs_set_alloc_block_callback(ext2_filsys fs,
              errcode_t (*func)(ext2_filsys fs,
                    blk64_t goal,
                    blk64_t *ret),
              errcode_t (**old)(ext2_filsys fs,
                    blk64_t goal,
                    blk64_t *ret));
blk64_t ext2fs_find_inode_goal(ext2_filsys fs, ext2_ino_t ino,
             struct ext2_inode *inode, blk64_t lblk);
extern void ext2fs_set_new_range_callback(ext2_filsys fs,
  errcode_t (*func)(ext2_filsys fs, int flags, blk64_t goal,
             blk64_t len, blk64_t *pblk, blk64_t *plen),
  errcode_t (**old)(ext2_filsys fs, int flags, blk64_t goal,
             blk64_t len, blk64_t *pblk, blk64_t *plen));
extern void ext2fs_set_block_alloc_stats_range_callback(ext2_filsys fs,
  void (*func)(ext2_filsys fs, blk64_t blk,
            blk_t num, int inuse),
  void (**old)(ext2_filsys fs, blk64_t blk,
            blk_t num, int inuse));
#define EXT2_NEWRANGE_FIXED_GOAL  (0x1)
#define EXT2_NEWRANGE_MIN_LENGTH  (0x2)
#define EXT2_NEWRANGE_ALL_FLAGS   (0x3)
errcode_t ext2fs_new_range(ext2_filsys fs, int flags, blk64_t goal,
         blk64_t len, ext2fs_block_bitmap map, blk64_t *pblk,
         blk64_t *plen);
#define EXT2_ALLOCRANGE_FIXED_GOAL  (0x1)
#define EXT2_ALLOCRANGE_ZERO_BLOCKS (0x2)
#define EXT2_ALLOCRANGE_ALL_FLAGS (0x3)
errcode_t ext2fs_alloc_range(ext2_filsys fs, int flags, blk64_t goal,
           blk_t len, blk64_t *ret);

/* alloc_sb.c */
extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
          dgrp_t group,
          ext2fs_block_bitmap bmap);
extern errcode_t ext2fs_reserve_super_and_bgd2(ext2_filsys fs,
                 dgrp_t group,
                 ext2fs_block_bitmap bmap,
                 blk_t *desc_blocks);
extern void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
              void (*func)(ext2_filsys fs,
                     blk64_t blk,
                     int inuse),
              void (**old)(ext2_filsys fs,
                     blk64_t blk,
                     int inuse));

/* 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);
void ext2fs_block_alloc_stats2(ext2_filsys fs, blk64_t blk, int inuse);
void ext2fs_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
            blk_t num, 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 void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap);
extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap);
extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
            ext2fs_generic_bitmap *dest);
extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
                const char *descr,
                ext2fs_block_bitmap *ret);
extern errcode_t ext2fs_allocate_subcluster_bitmap(ext2_filsys fs,
               const char *descr,
               ext2fs_block_bitmap *ret);
extern int ext2fs_get_bitmap_granularity(ext2fs_block_bitmap bitmap);
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 errcode_t ext2fs_fudge_block_bitmap_end2(ext2fs_block_bitmap bitmap,
           blk64_t end, blk64_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_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
              ext2fs_inode_bitmap bmap);
extern errcode_t ext2fs_resize_inode_bitmap2(__u64 new_end,
               __u64 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_resize_block_bitmap2(__u64 new_end,
               __u64 new_real_end,
               ext2fs_block_bitmap bmap);
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);
extern errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap,
          ext2_ino_t start, unsigned int num,
          void *in);
extern errcode_t ext2fs_set_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
           __u64 start, size_t num,
           void *in);
extern errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap,
          ext2_ino_t start, unsigned int num,
          void *out);
extern errcode_t ext2fs_get_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
           __u64 start, size_t num,
           void *out);
extern errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap,
          blk_t start, unsigned int num,
          void *in);
extern errcode_t ext2fs_set_block_bitmap_range2(ext2fs_block_bitmap bmap,
           blk64_t start, size_t num,
           void *in);
extern errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap,
          blk_t start, unsigned int num,
          void *out);
extern errcode_t ext2fs_get_block_bitmap_range2(ext2fs_block_bitmap bmap,
           blk64_t start, size_t num,
           void *out);

/* blknum.c */
extern __u32 ext2fs_inode_bitmap_checksum(ext2_filsys fs, dgrp_t group);
extern __u32 ext2fs_block_bitmap_checksum(ext2_filsys fs, dgrp_t group);
extern dgrp_t ext2fs_group_of_blk2(ext2_filsys fs, blk64_t);
extern blk64_t ext2fs_group_first_block2(ext2_filsys fs, dgrp_t group);
extern blk64_t ext2fs_group_last_block2(ext2_filsys fs, dgrp_t group);
extern int ext2fs_group_blocks_count(ext2_filsys fs, dgrp_t group);
extern blk64_t ext2fs_inode_data_blocks2(ext2_filsys fs,
           struct ext2_inode *inode);
extern blk64_t ext2fs_inode_i_blocks(ext2_filsys fs,
             struct ext2_inode *inode);
extern blk64_t ext2fs_get_stat_i_blocks(ext2_filsys fs,
          struct ext2_inode *inode);
extern blk64_t ext2fs_blocks_count(struct ext2_super_block *super);
extern void ext2fs_blocks_count_set(struct ext2_super_block *super,
            blk64_t blk);
extern void ext2fs_blocks_count_add(struct ext2_super_block *super,
            blk64_t blk);
extern blk64_t ext2fs_r_blocks_count(struct ext2_super_block *super);
extern void ext2fs_r_blocks_count_set(struct ext2_super_block *super,
              blk64_t blk);
extern void ext2fs_r_blocks_count_add(struct ext2_super_block *super,
              blk64_t blk);
extern blk64_t ext2fs_free_blocks_count(struct ext2_super_block *super);
extern void ext2fs_free_blocks_count_set(struct ext2_super_block *super,
           blk64_t blk);
extern void ext2fs_free_blocks_count_add(struct ext2_super_block *super,
           blk64_t blk);
/* Block group descriptor accessor functions */
extern struct ext2_group_desc *ext2fs_group_desc(ext2_filsys fs,
            struct opaque_ext2_group_desc *gdp,
            dgrp_t group);
extern blk64_t ext2fs_block_bitmap_csum(ext2_filsys fs, dgrp_t group);
extern blk64_t ext2fs_block_bitmap_loc(ext2_filsys fs, dgrp_t group);
extern void ext2fs_block_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
          blk64_t blk);
extern __u32 ext2fs_inode_bitmap_csum(ext2_filsys fs, dgrp_t group);
extern blk64_t ext2fs_inode_bitmap_loc(ext2_filsys fs, dgrp_t group);
extern void ext2fs_inode_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
          blk64_t blk);
extern blk64_t ext2fs_inode_table_loc(ext2_filsys fs, dgrp_t group);
extern void ext2fs_inode_table_loc_set(ext2_filsys fs, dgrp_t group,
               blk64_t blk);
extern __u32 ext2fs_bg_free_blocks_count(ext2_filsys fs, dgrp_t group);
extern void ext2fs_bg_free_blocks_count_set(ext2_filsys fs, dgrp_t group,
           __u32 n);
extern __u32 ext2fs_bg_free_inodes_count(ext2_filsys fs, dgrp_t group);
extern void ext2fs_bg_free_inodes_count_set(ext2_filsys fs, dgrp_t group,
           __u32 n);
extern __u32 ext2fs_bg_used_dirs_count(ext2_filsys fs, dgrp_t group);
extern void ext2fs_bg_used_dirs_count_set(ext2_filsys fs, dgrp_t group,
               __u32 n);
extern __u32 ext2fs_bg_itable_unused(ext2_filsys fs, dgrp_t group);
extern void ext2fs_bg_itable_unused_set(ext2_filsys fs, dgrp_t group,
             __u32 n);
extern __u16 ext2fs_bg_flags(ext2_filsys fs, dgrp_t group);
extern void ext2fs_bg_flags_zap(ext2_filsys fs, dgrp_t group);
extern int ext2fs_bg_flags_test(ext2_filsys fs, dgrp_t group, __u16 bg_flag);
extern void ext2fs_bg_flags_set(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
extern void ext2fs_bg_flags_clear(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
extern __u16 ext2fs_bg_checksum(ext2_filsys fs, dgrp_t group);
extern void ext2fs_bg_checksum_set(ext2_filsys fs, dgrp_t group, __u16 checksum);
extern blk64_t ext2fs_file_acl_block(ext2_filsys fs,
             const struct ext2_inode *inode);
extern void ext2fs_file_acl_block_set(ext2_filsys fs,
              struct ext2_inode *inode, blk64_t blk);
extern errcode_t ext2fs_inode_size_set(ext2_filsys fs, struct ext2_inode *inode,
               ext2_off64_t size);

/* 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);
errcode_t ext2fs_block_iterate3(ext2_filsys fs,
        ext2_ino_t ino,
        int flags,
        char *block_buf,
        int (*func)(ext2_filsys fs,
              blk64_t *blocknr,
              e2_blkcnt_t blockcnt,
              blk64_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);
extern errcode_t ext2fs_bmap2(ext2_filsys fs, ext2_ino_t ino,
            struct ext2_inode *inode,
            char *block_buf, int bmap_flags, blk64_t block,
            int *ret_flags, blk64_t *phys_blk);
errcode_t ext2fs_map_cluster_block(ext2_filsys fs, ext2_ino_t ino,
           struct ext2_inode *inode, blk64_t lblk,
           blk64_t *pblk);

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

/* 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_close2(ext2_filsys fs, int flags);
extern errcode_t ext2fs_close_free(ext2_filsys *fs);
extern errcode_t ext2fs_flush(ext2_filsys fs);
extern errcode_t ext2fs_flush2(ext2_filsys fs, int flags);
extern int ext2fs_bg_has_super(ext2_filsys fs, dgrp_t group_block);
extern errcode_t ext2fs_super_and_bgd_loc2(ext2_filsys fs,
            dgrp_t group,
            blk64_t *ret_super_blk,
            blk64_t *ret_old_desc_blk,
            blk64_t *ret_new_desc_blk,
            blk_t *ret_used_blks);
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);

/* crc32c.c */
extern __u32 ext2fs_crc32_be(__u32 crc, unsigned char const *p, size_t len);
extern __u32 ext2fs_crc32c_le(__u32 crc, unsigned char const *p, size_t len);

/* csum.c */
extern void ext2fs_init_csum_seed(ext2_filsys fs);
extern errcode_t ext2fs_mmp_csum_set(ext2_filsys fs, struct mmp_struct *mmp);
extern int ext2fs_mmp_csum_verify(ext2_filsys, struct mmp_struct *mmp);
extern int ext2fs_verify_csum_type(ext2_filsys fs, struct ext2_super_block *sb);
extern errcode_t ext2fs_superblock_csum_set(ext2_filsys fs,
              struct ext2_super_block *sb);
extern int ext2fs_superblock_csum_verify(ext2_filsys fs,
           struct ext2_super_block *sb);
extern errcode_t ext2fs_ext_attr_block_csum_set(ext2_filsys fs,
          ext2_ino_t inum, blk64_t block,
          struct ext2_ext_attr_header *hdr);
extern int ext2fs_ext_attr_block_csum_verify(ext2_filsys fs, ext2_ino_t inum,
               blk64_t block,
               struct ext2_ext_attr_header *hdr);
#define EXT2_DIRENT_TAIL(block, blocksize) \
  ((struct ext2_dir_entry_tail *)(((char *)(block)) + \
  (blocksize) - sizeof(struct ext2_dir_entry_tail)))

extern void ext2fs_initialize_dirent_tail(ext2_filsys fs,
            struct ext2_dir_entry_tail *t);
extern int ext2fs_dirent_has_tail(ext2_filsys fs,
          struct ext2_dir_entry *dirent);
extern int ext2fs_dirent_csum_verify(ext2_filsys fs, ext2_ino_t inum,
             struct ext2_dir_entry *dirent);
extern int ext2fs_dir_block_csum_verify(ext2_filsys fs, ext2_ino_t inum,
          struct ext2_dir_entry *dirent);
extern errcode_t ext2fs_dir_block_csum_set(ext2_filsys fs, ext2_ino_t inum,
             struct ext2_dir_entry *dirent);
extern errcode_t ext2fs_get_dx_countlimit(ext2_filsys fs,
            struct ext2_dir_entry *dirent,
            struct ext2_dx_countlimit **cc,
            int *offset);
extern errcode_t ext2fs_dx_csum(ext2_filsys fs, ext2_ino_t inum,
        struct ext2_dir_entry *dirent,
        __u32 *crc, struct ext2_dx_tail **ret_t);
extern errcode_t ext2fs_extent_block_csum_set(ext2_filsys fs,
                ext2_ino_t inum,
                struct ext3_extent_header *eh);
extern int ext2fs_extent_block_csum_verify(ext2_filsys fs,
             ext2_ino_t inum,
             struct ext3_extent_header *eh);
extern errcode_t ext2fs_block_bitmap_csum_set(ext2_filsys fs, dgrp_t group,
                char *bitmap, int size);
extern int ext2fs_block_bitmap_csum_verify(ext2_filsys fs, dgrp_t group,
             char *bitmap, int size);
extern errcode_t ext2fs_inode_bitmap_csum_set(ext2_filsys fs, dgrp_t group,
                char *bitmap, int size);
extern int ext2fs_inode_bitmap_csum_verify(ext2_filsys fs, dgrp_t group,
             char *bitmap, int size);
extern errcode_t ext2fs_inode_csum_set(ext2_filsys fs, ext2_ino_t inum,
               struct ext2_inode_large *inode);
extern int ext2fs_inode_csum_verify(ext2_filsys fs, ext2_ino_t inum,
            struct ext2_inode_large *inode);
extern void ext2fs_group_desc_csum_set(ext2_filsys fs, dgrp_t group);
extern int ext2fs_group_desc_csum_verify(ext2_filsys fs, dgrp_t group);
extern errcode_t ext2fs_set_gdt_csum(ext2_filsys fs);
extern __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group);

/* dblist.c */
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 errcode_t ext2fs_add_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
               blk64_t blk, e2_blkcnt_t blockcnt);
extern void ext2fs_dblist_sort(ext2_dblist dblist,
             EXT2_QSORT_TYPE (*sortfunc)(const void *,
                 const void *));
extern void ext2fs_dblist_sort2(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_dblist_iterate2(ext2_dblist dblist,
  int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info,
        void  *priv_data),
  void *priv_data);
extern errcode_t ext2fs_dblist_iterate3(ext2_dblist dblist,
  int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info,
        void  *priv_data),
  unsigned long long start,
  unsigned long long count,
  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_set_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
               blk64_t blk, e2_blkcnt_t blockcnt);
extern errcode_t ext2fs_copy_dblist(ext2_dblist src,
            ext2_dblist *dest);
extern int ext2fs_dblist_count(ext2_dblist dblist);
extern blk64_t ext2fs_dblist_count2(ext2_dblist dblist);
extern errcode_t ext2fs_dblist_get_last(ext2_dblist dblist,
          struct ext2_db_entry **entry);
extern errcode_t ext2fs_dblist_get_last2(ext2_dblist dblist,
          struct ext2_db_entry2 **entry);
extern errcode_t ext2fs_dblist_drop_last(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);

#if 0
/* digest_encode.c */
#define EXT2FS_DIGEST_SIZE EXT2FS_SHA256_LENGTH
extern int ext2fs_digest_encode(const char *src, int len, char *dst);
extern int ext2fs_digest_decode(const char *src, int len, char *dst);
#endif

/* 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_read_dir_block3(ext2_filsys fs, blk64_t block,
          void *buf, int flags);
extern errcode_t ext2fs_read_dir_block4(ext2_filsys fs, blk64_t block,
          void *buf, int flags, ext2_ino_t ino);
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);
extern errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block,
           void *buf, int flags);
extern errcode_t ext2fs_write_dir_block4(ext2_filsys fs, blk64_t block,
           void *buf, int flags, ext2_ino_t ino);

/* 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);

extern errcode_t ext2fs_dirhash2(int version, const char *name, int len,
         const struct ext2fs_nls_table *charset,
         int hash_flags,
         const __u32 *seed,
         ext2_dirhash_t *ret_hash,
         ext2_dirhash_t *ret_minor_hash);

/* dir_iterate.c */
extern errcode_t ext2fs_get_rec_len(ext2_filsys fs,
            struct ext2_dir_entry *dirent,
            unsigned int *rec_len);
extern errcode_t ext2fs_set_rec_len(ext2_filsys fs,
            unsigned int len,
            struct ext2_dir_entry *dirent);
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 __u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry,
          void *data);
extern __u32 ext2fs_ext_attr_hash_entry_signed(struct ext2_ext_attr_entry *entry,
                 void *data);
extern errcode_t ext2fs_ext_attr_hash_entry2(ext2_filsys fs,
               struct ext2_ext_attr_entry *entry,
               void *data, __u32 *hash);
extern errcode_t ext2fs_ext_attr_hash_entry3(ext2_filsys fs,
               struct ext2_ext_attr_entry *entry,
               void *data, __u32 *hash,
               __u32 *signed_hash);
extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf);
extern errcode_t ext2fs_read_ext_attr2(ext2_filsys fs, blk64_t block,
               void *buf);
extern errcode_t ext2fs_read_ext_attr3(ext2_filsys fs, blk64_t block,
               void *buf, ext2_ino_t inum);
extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block,
               void *buf);
extern errcode_t ext2fs_write_ext_attr2(ext2_filsys fs, blk64_t block,
               void *buf);
extern errcode_t ext2fs_write_ext_attr3(ext2_filsys fs, blk64_t block,
               void *buf, ext2_ino_t inum);
extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,
             char *block_buf,
             int adjust, __u32 *newcount);
extern errcode_t ext2fs_adjust_ea_refcount2(ext2_filsys fs, blk64_t blk,
             char *block_buf,
             int adjust, __u32 *newcount);
extern errcode_t ext2fs_adjust_ea_refcount3(ext2_filsys fs, blk64_t blk,
             char *block_buf,
             int adjust, __u32 *newcount,
             ext2_ino_t inum);
errcode_t ext2fs_xattrs_write(struct ext2_xattr_handle *handle);
errcode_t ext2fs_xattrs_read(struct ext2_xattr_handle *handle);
errcode_t ext2fs_xattrs_read_inode(struct ext2_xattr_handle *handle,
           struct ext2_inode_large *inode);
errcode_t ext2fs_xattrs_iterate(struct ext2_xattr_handle *h,
        int (*func)(char *name, char *value,
              size_t value_len, void *data),
        void *data);
errcode_t ext2fs_xattr_get(struct ext2_xattr_handle *h, const char *key,
         void **value, size_t *value_len);
errcode_t ext2fs_xattr_set(struct ext2_xattr_handle *handle,
         const char *key,
         const void *value,
         size_t value_len);
errcode_t ext2fs_xattr_remove(struct ext2_xattr_handle *handle,
            const char *key);
errcode_t ext2fs_xattr_remove_all(struct ext2_xattr_handle *handle);
errcode_t ext2fs_xattrs_open(ext2_filsys fs, ext2_ino_t ino,
           struct ext2_xattr_handle **handle);
errcode_t ext2fs_xattrs_close(struct ext2_xattr_handle **handle);
errcode_t ext2fs_free_ext_attr(ext2_filsys fs, ext2_ino_t ino,
             struct ext2_inode_large *inode);
errcode_t ext2fs_xattrs_count(struct ext2_xattr_handle *handle, size_t *count);
errcode_t ext2fs_xattr_inode_max_size(ext2_filsys fs, ext2_ino_t ino,
              size_t *size);
#define XATTR_HANDLE_FLAG_RAW 0x0001
errcode_t ext2fs_xattrs_flags(struct ext2_xattr_handle *handle,
            unsigned int *new_flags, unsigned int *old_flags);
extern void ext2fs_ext_attr_block_rehash(struct ext2_ext_attr_header *header,
           struct ext2_ext_attr_entry *end);
extern __u32 ext2fs_get_ea_inode_hash(struct ext2_inode *inode);
extern void ext2fs_set_ea_inode_hash(struct ext2_inode *inode, __u32 hash);
extern __u64 ext2fs_get_ea_inode_ref(struct ext2_inode *inode);
extern void ext2fs_set_ea_inode_ref(struct ext2_inode *inode, __u64 ref_count);

/* extent.c */
extern errcode_t ext2fs_extent_header_verify(void *ptr, int size);
extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino,
            ext2_extent_handle_t *handle);
extern errcode_t ext2fs_extent_open2(ext2_filsys fs, ext2_ino_t ino,
          struct ext2_inode *inode,
          ext2_extent_handle_t *ret_handle);
extern void ext2fs_extent_free(ext2_extent_handle_t handle);
extern errcode_t ext2fs_extent_get(ext2_extent_handle_t handle,
           int flags, struct ext2fs_extent *extent);
extern errcode_t ext2fs_extent_node_split(ext2_extent_handle_t handle);
extern errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle, int flags,
               struct ext2fs_extent *extent);
extern errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags,
              struct ext2fs_extent *extent);
extern errcode_t ext2fs_extent_set_bmap(ext2_extent_handle_t handle,
          blk64_t logical, blk64_t physical,
          int flags);
extern errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags);
extern errcode_t ext2fs_extent_get_info(ext2_extent_handle_t handle,
          struct ext2_extent_info *info);
extern errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle,
            blk64_t blk);
extern errcode_t ext2fs_extent_goto2(ext2_extent_handle_t handle,
             int leaf_level, blk64_t blk);
extern errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle);
extern size_t ext2fs_max_extent_depth(ext2_extent_handle_t handle);
extern errcode_t ext2fs_fix_extents_checksums(ext2_filsys fs, ext2_ino_t ino,
                struct ext2_inode *inode);
extern errcode_t ext2fs_count_blocks(ext2_filsys fs, ext2_ino_t ino,
             struct ext2_inode *inode, blk64_t *ret_count);
extern errcode_t ext2fs_decode_extent(struct ext2fs_extent *to, void *from,
              int len);

/* fallocate.c */
#define EXT2_FALLOCATE_ZERO_BLOCKS  (0x1)
#define EXT2_FALLOCATE_FORCE_INIT (0x2)
#define EXT2_FALLOCATE_FORCE_UNINIT (0x4)
#define EXT2_FALLOCATE_INIT_BEYOND_EOF  (0x8)
#define EXT2_FALLOCATE_ALL_FLAGS  (0xF)
errcode_t ext2fs_fallocate(ext2_filsys fs, int flags, ext2_ino_t ino,
         struct ext2_inode *inode, blk64_t goal,
         blk64_t start, blk64_t len);

/* 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);
struct ext2_inode *ext2fs_file_get_inode(ext2_file_t file);
extern ext2_ino_t ext2fs_file_get_inode_num(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);
extern errcode_t ext2fs_file_set_size2(ext2_file_t file, ext2_off64_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_dblist(ext2_dblist dblist);
extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb);
extern void ext2fs_u32_list_free(ext2_u32_list bb);

/* gen_bitmap.c */
extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap);
extern errcode_t ext2fs_make_generic_bitmap(errcode_t magic, ext2_filsys fs,
              __u32 start, __u32 end,
              __u32 real_end,
              const char *descr, char *init_map,
              ext2fs_generic_bitmap *ret);
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_copy_generic_bitmap(ext2fs_generic_bitmap src,
              ext2fs_generic_bitmap *dest);
extern void ext2fs_clear_generic_bitmap(ext2fs_generic_bitmap bitmap);
extern errcode_t ext2fs_fudge_generic_bitmap_end(ext2fs_inode_bitmap bitmap,
             errcode_t magic,
             errcode_t neq,
             ext2_ino_t end,
             ext2_ino_t *oend);
extern void ext2fs_set_generic_bitmap_padding(ext2fs_generic_bitmap map);
extern errcode_t ext2fs_resize_generic_bitmap(errcode_t magic,
                __u32 new_end,
                __u32 new_real_end,
                ext2fs_generic_bitmap bmap);
extern errcode_t ext2fs_compare_generic_bitmap(errcode_t magic, errcode_t neq,
                 ext2fs_generic_bitmap bm1,
                 ext2fs_generic_bitmap bm2);
extern errcode_t ext2fs_get_generic_bitmap_range(ext2fs_generic_bitmap bmap,
             errcode_t magic,
             __u32 start, __u32 num,
             void *out);
extern errcode_t ext2fs_set_generic_bitmap_range(ext2fs_generic_bitmap bmap,
             errcode_t magic,
             __u32 start, __u32 num,
             void *in);
extern errcode_t ext2fs_find_first_zero_generic_bitmap(ext2fs_generic_bitmap bitmap,
                   __u32 start, __u32 end,
                   __u32 *out);
extern errcode_t ext2fs_find_first_set_generic_bitmap(ext2fs_generic_bitmap bitmap,
                   __u32 start, __u32 end,
                   __u32 *out);

/* gen_bitmap64.c */
void ext2fs_free_generic_bmap(ext2fs_generic_bitmap bmap);
errcode_t ext2fs_alloc_generic_bmap(ext2_filsys fs, errcode_t magic,
            int type, __u64 start, __u64 end,
            __u64 real_end,
            const char *descr,
            ext2fs_generic_bitmap *ret);
errcode_t ext2fs_copy_generic_bmap(ext2fs_generic_bitmap src,
           ext2fs_generic_bitmap *dest);
void ext2fs_clear_generic_bmap(ext2fs_generic_bitmap bitmap);
errcode_t ext2fs_fudge_generic_bmap_end(ext2fs_generic_bitmap bitmap,
          errcode_t neq,
          __u64 end, __u64 *oend);
void ext2fs_set_generic_bmap_padding(ext2fs_generic_bitmap bmap);
errcode_t ext2fs_resize_generic_bmap(ext2fs_generic_bitmap bmap,
             __u64 new_end,
             __u64 new_real_end);
errcode_t ext2fs_compare_generic_bmap(errcode_t neq,
              ext2fs_generic_bitmap bm1,
              ext2fs_generic_bitmap bm2);
errcode_t ext2fs_get_generic_bmap_range(ext2fs_generic_bitmap bmap,
          __u64 start, unsigned int num,
          void *out);
errcode_t ext2fs_set_generic_bmap_range(ext2fs_generic_bitmap bmap,
          __u64 start, unsigned int num,
          void *in);
errcode_t ext2fs_convert_subcluster_bitmap(ext2_filsys fs,
             ext2fs_block_bitmap *bitmap);
errcode_t ext2fs_count_used_clusters(ext2_filsys fs, blk64_t start,
             blk64_t end, blk64_t *out);
errcode_t ext2fs_count_used_blocks(ext2_filsys fs, blk64_t start,
           blk64_t end, blk64_t *out);
extern unsigned int ext2fs_list_backups(ext2_filsys fs, unsigned int *three,
        unsigned int *five, unsigned int *seven);

/* getenv.c */
extern char *ext2fs_safe_getenv(const char *arg);

/* get_num_dirs.c */
extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs);

/* getsize.c */
extern errcode_t ext2fs_get_device_size(const char *file, int blocksize,
          blk_t *retblocks);
extern errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
          blk64_t *retblocks);

/* getsectsize.c */
extern int ext2fs_get_dio_alignment(int fd);
errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize);
errcode_t ext2fs_get_device_phys_sectsize(const char *file, int *sectsize);

/* i_block.c */
errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
         blk64_t num_blocks);
errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode,
         blk64_t num_blocks);
errcode_t ext2fs_iblk_set(ext2_filsys fs, struct ext2_inode *inode, blk64_t b);

/* 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);
extern errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs, int super_only);

/* icount.c */
extern void ext2fs_free_icount(ext2_icount_t icount);
extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir,
            int flags, ext2_icount_t *ret);
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 *);

/* inline.c */

extern errcode_t ext2fs_get_memalign(unsigned long size,
             unsigned long align, void *ptr);

/* inline_data.c */
extern errcode_t ext2fs_inline_data_init(ext2_filsys fs, ext2_ino_t ino);
extern errcode_t ext2fs_inline_data_size(ext2_filsys fs, ext2_ino_t ino,
           size_t *size);
extern errcode_t ext2fs_inline_data_get(ext2_filsys fs, ext2_ino_t ino,
          struct ext2_inode *inode,
          void *buf, size_t *size);
extern errcode_t ext2fs_inline_data_set(ext2_filsys fs, ext2_ino_t ino,
          struct ext2_inode *inode,
          void *buf, size_t size);

/* inode.c */
extern errcode_t ext2fs_create_inode_cache(ext2_filsys fs,
             unsigned int cache_size);
extern void ext2fs_free_inode_cache(struct ext2_inode_cache *icache);
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);
#define EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS 8
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_read_inode2(ext2_filsys fs, ext2_ino_t ino,
            struct ext2_inode * inode,
            int bufsize, int flags);
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_inode2(ext2_filsys fs, ext2_ino_t ino,
             struct ext2_inode * inode,
             int bufsize, int flags);
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);

/* punch.c */
/*
 * NOTE: This function removes from an inode the blocks "start", "end", and
 * every block in between.
 */
extern errcode_t ext2fs_punch(ext2_filsys fs, ext2_ino_t ino,
            struct ext2_inode *inode,
            char *block_buf, blk64_t start,
            blk64_t end);

/* 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);
extern errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs, ext2_ino_t dir_ino,
        ext2_ino_t parent_ino, __u32 *iblock);

/* nls_utf8.c */
extern const struct ext2fs_nls_table *ext2fs_load_nls_table(int encoding);
extern int ext2fs_check_encoded_name(const struct ext2fs_nls_table *table,
             char *s, size_t len, char **pos);
extern int ext2fs_casefold_cmp(const struct ext2fs_nls_table *table,
             const unsigned char *str1, size_t len1,
             const unsigned char *str2, size_t len2);

/* mkdir.c */
extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
            const char *name);
extern errcode_t ext2fs_mkdir2(ext2_filsys fs, ext2_ino_t parent,
             ext2_ino_t ino, unsigned long flags,
             int link_flags, const char *name,
             ext2_ino_t *ret_ino);

/* mkjournal.c */
struct ext2fs_journal_params {
  blk_t num_journal_blocks;
  blk_t num_fc_blocks;
};
extern errcode_t ext2fs_get_journal_params(
    struct ext2fs_journal_params *params, ext2_filsys fs);
extern errcode_t ext2fs_zero_blocks(ext2_filsys fs, blk_t blk, int num,
            blk_t *ret_blk, int *ret_count);
extern errcode_t ext2fs_zero_blocks2(ext2_filsys fs, blk64_t blk, int num,
             blk64_t *ret_blk, int *ret_count);
extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
              __u32 num_blocks, int flags,
              char  **ret_jsb);
extern errcode_t ext2fs_create_journal_superblock2(ext2_filsys fs,
              struct ext2fs_journal_params *params,
              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 num_blocks,
            int flags);
extern errcode_t ext2fs_add_journal_inode2(ext2_filsys fs, blk_t num_blocks,
             blk64_t goal, int flags);
extern errcode_t ext2fs_add_journal_inode3(ext2_filsys fs,
            struct ext2fs_journal_params *params,
            blk64_t goal, int flags);
extern int ext2fs_default_journal_size(__u64 num_blocks);
extern int ext2fs_journal_sb_start(int blocksize);

/* 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);
/*
 * The dgrp_t argument to these two functions is not actually a group number
 * but a block number offset within a group table!  Convert with the formula
 * (group_number / groups_per_block).
 */
extern blk64_t ext2fs_descriptor_block_loc2(ext2_filsys fs,
          blk64_t group_block, dgrp_t i);
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);

/* orphan.c */
#define EXT4_MAX_ORPHAN_FILE_SIZE 8 << 20
#define EXT4_DEFAULT_ORPHAN_FILE_SIZE 2 << 20
extern errcode_t ext2fs_create_orphan_file(ext2_filsys fs, blk_t num_blocks);
extern errcode_t ext2fs_truncate_orphan_file(ext2_filsys fs);
extern e2_blkcnt_t ext2fs_default_orphan_file_blocks(ext2_filsys fs);
extern __u32 ext2fs_do_orphan_file_block_csum(ext2_filsys fs, ext2_ino_t ino,
                __u32 gen, blk64_t blk,
                char *buf);
extern errcode_t ext2fs_orphan_file_block_csum_set(ext2_filsys fs,
               ext2_ino_t ino, blk64_t blk,
               char *buf);
extern int ext2fs_orphan_file_block_csum_verify(ext2_filsys fs, ext2_ino_t ino,
            blk64_t blk, char *buf);

/* 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);

/* symlink.c */
errcode_t ext2fs_symlink(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t ino,
       const char *name, const char *target);
int ext2fs_is_fast_symlink(struct ext2_inode *inode);

/* mmp.c */
errcode_t ext2fs_mmp_read(ext2_filsys fs, blk64_t mmp_blk, void *buf);
errcode_t ext2fs_mmp_write(ext2_filsys fs, blk64_t mmp_blk, void *buf);
errcode_t ext2fs_mmp_clear(ext2_filsys fs);
errcode_t ext2fs_mmp_init(ext2_filsys fs);
errcode_t ext2fs_mmp_start(ext2_filsys fs);
errcode_t ext2fs_mmp_update(ext2_filsys fs);
errcode_t ext2fs_mmp_update2(ext2_filsys fs, int immediately);
errcode_t ext2fs_mmp_stop(ext2_filsys fs);
unsigned ext2fs_mmp_new_seq(void);

/* 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);

/* rw_bitmaps.c */
extern errcode_t ext2fs_rw_bitmaps(ext2_filsys fs, int flags, int num_threads);
extern errcode_t ext2fs_read_bitmaps(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_write_bitmaps(ext2_filsys fs);
extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs);
extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs);

/*sha256.c */
#define EXT2FS_SHA256_LENGTH 32
#if 0
extern void ext2fs_sha256(const unsigned char *in, unsigned long in_size,
       unsigned char out[EXT2FS_SHA256_LENGTH]);
#endif

/* sha512.c */
#define EXT2FS_SHA512_LENGTH 64
extern void ext2fs_sha512(const unsigned char *in, unsigned long in_size,
        unsigned char out[EXT2FS_SHA512_LENGTH]);

/* swapfs.c */
extern errcode_t ext2fs_dirent_swab_in2(ext2_filsys fs, char *buf, size_t size,
          int flags);
extern errcode_t ext2fs_dirent_swab_in(ext2_filsys fs, char *buf, int flags);
extern errcode_t ext2fs_dirent_swab_out2(ext2_filsys fs, char *buf, size_t size,
           int flags);
extern errcode_t ext2fs_dirent_swab_out(ext2_filsys fs, char *buf, int flags);
extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize,
         int has_header);
extern void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
          struct ext2_ext_attr_header *from_hdr);
extern void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
               struct ext2_ext_attr_entry *from_entry);
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_group_desc2(ext2_filsys, 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);
extern void ext2fs_swap_mmp(struct mmp_struct *mmp);

/* unix_io.c */
extern int ext2fs_open_file(const char *pathname, int flags, mode_t mode);
extern int ext2fs_stat(const char *path, ext2fs_struct_stat *buf);
extern int ext2fs_fstat(int fd, ext2fs_struct_stat *buf);

/* valid_blk.c */
extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode);
extern int ext2fs_inode_has_valid_blocks2(ext2_filsys fs,
            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 */
#ifdef NO_INLINE_FUNCS
extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr);
extern errcode_t ext2fs_get_memzero(unsigned long size, void *ptr);
extern errcode_t ext2fs_get_array(unsigned long count,
          unsigned long size, void *ptr);
extern errcode_t ext2fs_get_arrayzero(unsigned long count,
              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 errcode_t ext2fs_resize_array(unsigned long old_count, unsigned long count,
             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 dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk);
extern dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino);
extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group);
extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group);
extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
              struct ext2_inode *inode);
extern int ext2fs_htree_intnode_maxrecs(ext2_filsys fs, int blocks);
extern int ext2fs_log2_u32(__u32 arg);
extern int ext2fs_log2_u64(__u64 arg);
extern int ext2fs_log10_u32(__u32 arg);
extern int ext2fs_log10_u64(__u64 arg);
extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b);
extern __u64 ext2fs_div64_ceil(__u64 a, __u64 b);
extern int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry);
extern void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len);
extern int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry);
extern void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type);
extern struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode);
extern const struct ext2_inode *ext2fs_const_inode(const struct ext2_inode_large * large_inode);
extern int ext2fs_inodes_per_orphan_block(ext2_filsys fs);
extern struct ext4_orphan_block_tail *ext2fs_orphan_block_tail(ext2_filsys fs,
                     char *buf);
#endif

/*
 * 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))
#ifdef INCLUDE_INLINE_FUNCS
#define _INLINE_ extern
#else
#if (__STDC_VERSION__ >= 199901L)
#define _INLINE_ inline
#else
#ifdef __GNUC__
#define _INLINE_ extern __inline__
#else       /* For Watcom C */
#define _INLINE_ extern inline
#endif /* __GNUC__ */
#endif /* __STDC_VERSION__ >= 199901L */
#endif

#ifndef EXT2_CUSTOM_MEMORY_ROUTINES
#include <string.h>
/*
 *  Allocate memory.  The 'ptr' arg must point to a pointer.
 */
_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
{
  void *pp;

  pp = malloc(size);
  if (!pp)
    return EXT2_ET_NO_MEMORY;
  memcpy(ptr, &pp, sizeof (pp));
  return 0;
}

_INLINE_ errcode_t ext2fs_get_memzero(unsigned long size, void *ptr)
{
  void *pp;

  pp = malloc(size);
  if (!pp)
    return EXT2_ET_NO_MEMORY;
  memset(pp, 0, size);
  memcpy(ptr, &pp, sizeof(pp));
  return 0;
}

_INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size,
            void *ptr)
{
  if (count && (~0UL)/count < size)
    return EXT2_ET_NO_MEMORY;
  return ext2fs_get_mem(count*size, ptr);
}

_INLINE_ errcode_t ext2fs_get_arrayzero(unsigned long count,
          unsigned long size, void *ptr)
{
  if (count && (~0UL)/count < size)
    return EXT2_ET_NO_MEMORY;

  return ext2fs_get_memzero((size_t)count * size, ptr);
}

/*
 * Free memory.  The 'ptr' arg must point to a pointer.
 */
_INLINE_ errcode_t ext2fs_free_mem(void *ptr)
{
  void *p;

  memcpy(&p, ptr, sizeof(p));
  free(p);
  p = 0;
  memcpy(ptr, &p, sizeof(p));
  return 0;
}

/*
 *  Resize memory.  The 'ptr' arg must point to a pointer.
 */
_INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
             unsigned long size, void *ptr)
{
  void *p;

  /* Use "memcpy" for pointer assignments here to avoid problems
   * with C99 strict type aliasing rules. */
  memcpy(&p, ptr, sizeof(p));
  p = realloc(p, size);
  if (!p)
    return EXT2_ET_NO_MEMORY;
  memcpy(ptr, &p, sizeof(p));
  return 0;
}

/*
 *  Resize array.  The 'ptr' arg must point to a pointer.
 */
_INLINE_ errcode_t ext2fs_resize_array(unsigned long size,
               unsigned long old_count,
               unsigned long count, void *ptr)
{
  unsigned long old_size;
  errcode_t retval;

  if (count && (~0UL)/count < size)
    return EXT2_ET_NO_MEMORY;

  size *= count;
  old_size = size * old_count;
  retval = ext2fs_resize_mem(old_size, size, ptr);
  if (retval)
    return retval;

  if (size > old_size) {
    void *p;

    memcpy(&p, ptr, sizeof(p));
    memset((char *)p + old_size, 0, size - old_size);
    memcpy(ptr, &p, sizeof(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_ dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
{
  return ext2fs_group_of_blk2(fs, blk);
}
/*
 * Return the group # of an inode number
 */
_INLINE_ dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
{
  return (ino - 1) / fs->super->s_inodes_per_group;
}

/*
 * Return the first block (inclusive) in a group
 */
_INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group)
{
  return (blk_t) ext2fs_group_first_block2(fs, group);
}

/*
 * Return the last block (inclusive) in a group
 */
_INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group)
{
  return (blk_t) ext2fs_group_last_block2(fs, group);
}

_INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
          struct ext2_inode *inode)
{
  return (blk_t) ext2fs_inode_data_blocks2(fs, inode);
}

_INLINE_ int ext2fs_htree_intnode_maxrecs(ext2_filsys fs, int blocks)
{
  int csum_size = 0;

  if ((EXT2_SB(fs->super)->s_feature_ro_compat &
       EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) != 0)
    csum_size = sizeof(struct ext2_dx_tail);
  return blocks * ((fs->blocksize - (8 + csum_size)) /
            sizeof(struct ext2_dx_entry));
}

/*
 * log base 2, rounded down
 */
_INLINE_ int ext2fs_log2_u32(__u32 arg)
{
  int l = 0;

  arg >>= 1;
  while (arg) {
    l++;
    arg >>= 1;
  }
  return l;
}

/*
 * log base 2, rounded down
 */
_INLINE_ int ext2fs_log2_u64(__u64 arg)
{
  int l = 0;

  arg >>= 1;
  while (arg) {
    l++;
    arg >>= 1;
  }
  return l;
}

/*
 * log base 10, rounded down
 */
_INLINE_ int ext2fs_log10_u32(__u32 arg)
{
  int l = 0;

  arg /= 10;
  while (arg) {
    l++;
    arg /= 10;
  }
  return l;
}

/*
 * log base 10, rounded down
 */
_INLINE_ int ext2fs_log10_u64(__u64 arg)
{
  int l = 0;

  arg /= 10;
  while (arg) {
    l++;
    arg /= 10;
  }
  return l;
}

/*
 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
 */
_INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b)
{
  if (!a)
    return 0;
  return ((a - 1) / b) + 1;
}

_INLINE_ __u64 ext2fs_div64_ceil(__u64 a, __u64 b)
{
  if (!a)
    return 0;
  return ((a - 1) / b) + 1;
}

_INLINE_ int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry)
{
  return entry->name_len & 0xff;
}

_INLINE_ void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len)
{
  entry->name_len = (entry->name_len & 0xff00) | (len & 0xff);
}

_INLINE_ int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry)
{
  return entry->name_len >> 8;
}

_INLINE_ void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type)
{
  entry->name_len = (entry->name_len & 0xff) | (type << 8);
}

_INLINE_ struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode)
{
  /* It is always safe to convert large inode to a small inode */
  return (struct ext2_inode *) large_inode;
}

_INLINE_ const struct ext2_inode *
ext2fs_const_inode(const struct ext2_inode_large * large_inode)
{
  /* It is always safe to convert large inode to a small inode */
  return (const struct ext2_inode *) large_inode;
}

_INLINE_ int ext2fs_inodes_per_orphan_block(ext2_filsys fs)
{
  return (fs->blocksize - sizeof(struct ext4_orphan_block_tail)) /
    sizeof(__u32);
}

_INLINE_ struct ext4_orphan_block_tail *
ext2fs_orphan_block_tail(ext2_filsys fs, char *buf)
{
  return (struct ext4_orphan_block_tail *)(buf + fs->blocksize -
    sizeof(struct ext4_orphan_block_tail));
}

#undef _INLINE_
#endif

/* htree levels for ext4 */
#define EXT4_HTREE_LEVEL_COMPAT 2
#define EXT4_HTREE_LEVEL  3

static inline unsigned int ext2_dir_htree_level(ext2_filsys fs)
{
  if (ext2fs_has_feature_largedir(fs->super))
    return EXT4_HTREE_LEVEL;

  return EXT4_HTREE_LEVEL_COMPAT;
}

/*
 * We explicitly decided not to reserve space for a 64-bit dtime,
 * since it's never displayed or exposed to userspace.  The dtime
 * field is used a linked list for the ophan list, and for forensic
 * purposes when trying to determine when an inode was deleted.  So
 * right after the 2038 epoch, a deleted inode might end up with a
 * dtime which is zero or smaller than the number of inodes, which
 * will result in e2fsck reporting a potential problems.  So when we
 * set the dtime, make sure that the dtime won't be mistaken for an
 * inode number.
 */
static inline void ext2fs_set_dtime(ext2_filsys fs, struct ext2_inode *inode)
{
  __u32 t;

  if (fs->now || (fs->flags2 & EXT2_FLAG2_USE_FAKE_TIME))
    t = fs->now & 0xFFFFFFFF;
  else
    t = time(NULL) & 0xFFFFFFFF;
  if (t < fs->super->s_inodes_count)
    t = fs->super->s_inodes_count;
  inode->i_dtime = t;
}

#ifdef __cplusplus
}
#endif

#endif /* _EXT2FS_EXT2FS_H */

Coverage Report

Created: 2026-03-12 06:19