drivers/filesystems/ext2/inc/linux/ext4.h

   1 #ifndef _EXT4_H
   2 #define _EXT4_H
   3
   4 #include <linux/jbd.h>
   5 /* Temporarily we need this. */
   6 #include <linux/ext3_fs.h>
   7
   8 typedef unsigned __int16 uint16_t;
   9 typedef unsigned __int32 uint32_t;
  10 typedef unsigned __int64 uint64_t;
  11
  12 typedef uint32_t ext4_lblk_t;
  13 typedef uint64_t ext4_fsblk_t;
  14
  15 /*
  16  * Flags used by ext4_map_blocks()
  17  */
  18         /* Allocate any needed blocks and/or convert an unwritten
  19            extent to be an initialized ext4 */
  20 #define EXT4_GET_BLOCKS_CREATE                  0x0001
  21         /* Request the creation of an unwritten extent */
  22 #define EXT4_GET_BLOCKS_UNWRIT_EXT              0x0002
  23 #define EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT       (EXT4_GET_BLOCKS_UNWRIT_EXT|\
  24                                                  EXT4_GET_BLOCKS_CREATE)
  25         /* Caller is from the delayed allocation writeout path
  26          * finally doing the actual allocation of delayed blocks */
  27 #define EXT4_GET_BLOCKS_DELALLOC_RESERVE        0x0004
  28         /* caller is from the direct IO path, request to creation of an
  29         unwritten extents if not allocated, split the unwritten
  30         extent if blocks has been preallocated already*/
  31 #define EXT4_GET_BLOCKS_PRE_IO                  0x0008
  32 #define EXT4_GET_BLOCKS_CONVERT                 0x0010
  33 #define EXT4_GET_BLOCKS_IO_CREATE_EXT           (EXT4_GET_BLOCKS_PRE_IO|\
  34                                          EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
  35         /* Convert extent to initialized after IO complete */
  36 #define EXT4_GET_BLOCKS_IO_CONVERT_EXT          (EXT4_GET_BLOCKS_CONVERT|\
  37                                          EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT)
  38         /* Eventual metadata allocation (due to growing extent tree)
  39          * should not fail, so try to use reserved blocks for that.*/
  40 #define EXT4_GET_BLOCKS_METADATA_NOFAIL         0x0020
  41         /* Don't normalize allocation size (used for fallocate) */
  42 #define EXT4_GET_BLOCKS_NO_NORMALIZE            0x0040
  43         /* Request will not result in inode size update (user for fallocate) */
  44 #define EXT4_GET_BLOCKS_KEEP_SIZE               0x0080
  45         /* Do not take i_data_sem locking in ext4_map_blocks */
  46 #define EXT4_GET_BLOCKS_NO_LOCK                 0x0100
  47         /* Do not put hole in extent cache */
  48 #define EXT4_GET_BLOCKS_NO_PUT_HOLE             0x0200
  49         /* Convert written extents to unwritten */
  50 #define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN       0x0400
  51
  52 /*
  53  * The bit position of these flags must not overlap with any of the
  54  * EXT4_GET_BLOCKS_*.  They are used by ext4_find_extent(),
  55  * read_extent_tree_block(), ext4_split_extent_at(),
  56  * ext4_ext_insert_extent(), and ext4_ext_create_new_leaf().
  57  * EXT4_EX_NOCACHE is used to indicate that the we shouldn't be
  58  * caching the extents when reading from the extent tree while a
  59  * truncate or punch hole operation is in progress.
  60  */
  61 #define EXT4_EX_NOCACHE                         0x40000000
  62 #define EXT4_EX_FORCE_CACHE                     0x20000000
  63
  64 /*
  65  * Flags used by ext4_free_blocks
  66  */
  67 #define EXT4_FREE_BLOCKS_METADATA       0x0001
  68 #define EXT4_FREE_BLOCKS_FORGET         0x0002
  69 #define EXT4_FREE_BLOCKS_VALIDATED      0x0004
  70 #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008
  71 #define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER   0x0010
  72 #define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER    0x0020
  73
  74 /*
  75  * Flags used in mballoc's allocation_context flags field.
  76  *
  77  * Also used to show what's going on for debugging purposes when the
  78  * flag field is exported via the traceport interface
  79  */
  80
  81 /* prefer goal again. length */
  82 #define EXT4_MB_HINT_MERGE              0x0001
  83 /* blocks already reserved */
  84 #define EXT4_MB_HINT_RESERVED           0x0002
  85 /* metadata is being allocated */
  86 #define EXT4_MB_HINT_METADATA           0x0004
  87 /* first blocks in the file */
  88 #define EXT4_MB_HINT_FIRST              0x0008
  89 /* search for the best chunk */
  90 #define EXT4_MB_HINT_BEST               0x0010
  91 /* data is being allocated */
  92 #define EXT4_MB_HINT_DATA               0x0020
  93 /* don't preallocate (for tails) */
  94 #define EXT4_MB_HINT_NOPREALLOC         0x0040
  95 /* allocate for locality group */
  96 #define EXT4_MB_HINT_GROUP_ALLOC        0x0080
  97 /* allocate goal blocks or none */
  98 #define EXT4_MB_HINT_GOAL_ONLY          0x0100
  99 /* goal is meaningful */
 100 #define EXT4_MB_HINT_TRY_GOAL           0x0200
 101 /* blocks already pre-reserved by delayed allocation */
 102 #define EXT4_MB_DELALLOC_RESERVED       0x0400
 103 /* We are doing stream allocation */
 104 #define EXT4_MB_STREAM_ALLOC            0x0800
 105 /* Use reserved root blocks if needed */
 106 #define EXT4_MB_USE_ROOT_BLOCKS         0x1000
 107 /* Use blocks from reserved pool */
 108 #define EXT4_MB_USE_RESERVED            0x2000
 109
 110
 111 #define ext4_sb_info ext3_sb_info
 112
 113 static inline struct ext4_sb_info * EXT4_SB(struct super_block *sb)
 114 {
 115     return sb->s_fs_info;
 116 }
 117 #define EXT4_I(i) (i)
 118
 119 #include <linux/ext4_jbd2.h>
 120 #include <linux/ext4_ext.h>
 121
 122 #endif  /* _EXT4_H */