ext4.h

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#ifndef _EXT4_H
#define _EXT4_H

#include <linux/jbd.h>
/* Temporarily we need this. */
#include <linux/ext3_fs.h>

typedef unsigned __int16 uint16_t;
typedef unsigned __int32 uint32_t;
typedef unsigned __int64 uint64_t;

typedef uint32_t ext4_lblk_t;
typedef uint64_t ext4_fsblk_t;

/*
 * Flags used by ext4_map_blocks()
 */
    /* Allocate any needed blocks and/or convert an unwritten
       extent to be an initialized ext4 */
#define EXT4_GET_BLOCKS_CREATE          0x0001
    /* Request the creation of an unwritten extent */
#define EXT4_GET_BLOCKS_UNWRIT_EXT      0x0002
#define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT   (EXT4_GET_BLOCKS_UNWRIT_EXT|\
                         EXT4_GET_BLOCKS_CREATE)
    /* Caller is from the delayed allocation writeout path
     * finally doing the actual allocation of delayed blocks */
#define EXT4_GET_BLOCKS_DELALLOC_RESERVE    0x0004
    /* caller is from the direct IO path, request to creation of an
    unwritten extents if not allocated, split the unwritten
    extent if blocks has been preallocated already*/
#define EXT4_GET_BLOCKS_PRE_IO          0x0008
#define EXT4_GET_BLOCKS_CONVERT         0x0010
#define EXT4_GET_BLOCKS_IO_CREATE_EXT       (EXT4_GET_BLOCKS_PRE_IO|\
                     EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
    /* Convert extent to initialized after IO complete */
#define EXT4_GET_BLOCKS_IO_CONVERT_EXT      (EXT4_GET_BLOCKS_CONVERT|\
                     EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
    /* Eventual metadata allocation (due to growing extent tree)
     * should not fail, so try to use reserved blocks for that.*/
#define EXT4_GET_BLOCKS_METADATA_NOFAIL     0x0020
    /* Don't normalize allocation size (used for fallocate) */
#define EXT4_GET_BLOCKS_NO_NORMALIZE        0x0040
    /* Request will not result in inode size update (user for fallocate) */
#define EXT4_GET_BLOCKS_KEEP_SIZE       0x0080
    /* Do not take i_data_sem locking in ext4_map_blocks */
#define EXT4_GET_BLOCKS_NO_LOCK         0x0100
    /* Do not put hole in extent cache */
#define EXT4_GET_BLOCKS_NO_PUT_HOLE     0x0200
    /* Convert written extents to unwritten */
#define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN   0x0400

/*
 * The bit position of these flags must not overlap with any of the
 * EXT4_GET_BLOCKS_*.  They are used by ext4_find_extent(),
 * read_extent_tree_block(), ext4_split_extent_at(),
 * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf().
 * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be
 * caching the extents when reading from the extent tree while a
 * truncate or punch hole operation is in progress.
 */
#define EXT4_EX_NOCACHE             0x40000000
#define EXT4_EX_FORCE_CACHE         0x20000000

/*
 * Flags used by ext4_free_blocks
 */
#define EXT4_FREE_BLOCKS_METADATA   0x0001
#define EXT4_FREE_BLOCKS_FORGET     0x0002
#define EXT4_FREE_BLOCKS_VALIDATED  0x0004
#define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008
#define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER   0x0010
#define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER    0x0020

/*
 * Flags used in mballoc's allocation_context flags field.
 *
 * Also used to show what's going on for debugging purposes when the
 * flag field is exported via the traceport interface
 */

/* prefer goal again. length */
#define EXT4_MB_HINT_MERGE      0x0001
/* blocks already reserved */
#define EXT4_MB_HINT_RESERVED       0x0002
/* metadata is being allocated */
#define EXT4_MB_HINT_METADATA       0x0004
/* first blocks in the file */
#define EXT4_MB_HINT_FIRST      0x0008
/* search for the best chunk */
#define EXT4_MB_HINT_BEST       0x0010
/* data is being allocated */
#define EXT4_MB_HINT_DATA       0x0020
/* don't preallocate (for tails) */
#define EXT4_MB_HINT_NOPREALLOC     0x0040
/* allocate for locality group */
#define EXT4_MB_HINT_GROUP_ALLOC    0x0080
/* allocate goal blocks or none */
#define EXT4_MB_HINT_GOAL_ONLY      0x0100
/* goal is meaningful */
#define EXT4_MB_HINT_TRY_GOAL       0x0200
/* blocks already pre-reserved by delayed allocation */
#define EXT4_MB_DELALLOC_RESERVED   0x0400
/* We are doing stream allocation */
#define EXT4_MB_STREAM_ALLOC        0x0800
/* Use reserved root blocks if needed */
#define EXT4_MB_USE_ROOT_BLOCKS     0x1000
/* Use blocks from reserved pool */
#define EXT4_MB_USE_RESERVED        0x2000


#define ext4_sb_info ext3_sb_info

static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb)
{
    return sb->s_fs_info;
}
#define EXT4_I(i) (i)

#include <linux/ext4_jbd2.h>
#include <linux/ext4_ext.h>

#endif  /* _EXT4_H */