drivers/filesystems/fs_rec/reiserfs.h

   1 /*
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS File System Recognizer
   4  * FILE:             drivers/filesystems/fs_rec/btrfs.h
   5  * PURPOSE:          BTRFS Header File
   6  * PROGRAMMER:       Peter Hater
   7  *                   Pierre Schweitzer (pierre@reactos.org)
   8  */
   9
  10 #include <pshpack1.h>
  11 struct journal_params {
  12     // Block number of the block containing the first journal node.
  13     UINT32 jp_journal_1st_block;              /* where does journal start from on its device */
  14
  15     // Journal device number (?? for if the journal is on a separate drive ??)
  16     UINT32 jp_journal_dev;            /* journal device st_rdev */
  17
  18     // Original journal size.  (Needed when using partition on systems w/ different default journal sizes).
  19     UINT32 jp_journal_size;           /* size of the journal */
  20
  21     UINT32 jp_journal_trans_max;              /* max number of blocks in a transaction. */
  22     UINT32 jp_journal_magic;          /* random value made on fs creation (this was sb_journal_block_count) */
  23     UINT32 jp_journal_max_batch;              /* max number of blocks to batch into a trans */
  24     UINT32 jp_journal_max_commit_age;  /* in seconds, how old can an async commit be */
  25     UINT32 jp_journal_max_trans_age;   /* in seconds, how old can a transaction be */
  26 };
  27
  28 typedef struct _RFSD_SUPER_BLOCK
  29 {
  30     // The number of blocks in the partition
  31     UINT32 s_blocks_count;         /* blocks count         */                   //[mark] was _s_blocks_count
  32
  33     // The number of free blocks in the partition
  34     UINT32 s_free_blocks_count;           /* free blocks count    */  //[mark] was _s_free_blocks
  35
  36     // Block number of the block containing the root node
  37     UINT32 s_root_block;            /* root block number    */
  38
  39     struct journal_params s_journal;
  40
  41     // The size (in bytes) of a block
  42     UINT16 s_blocksize;             /* block size */
  43
  44     UINT16 s_oid_maxsize;          /* max size of object id array, see get_objectid() commentary  */
  45     UINT16 s_oid_cursize;          /* current size of object id array */
  46     UINT16 s_umount_state;          /* this is set to 1 when filesystem was umounted, to 2 - when not */
  47     char s_magic[10];              /* reiserfs magic string indicates that
  48                                     * file system is reiserfs:
  49                                     * "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" */
  50
  51     // State of the partition: valid(1), error (2)
  52     UINT16 s_fs_state;             /* it is set to used by fsck to mark which phase of rebuilding is done */
  53
  54     UINT32 s_hash_function_code;    /* indicate, what hash function is being use
  55                                      * to sort names in a directory*/
  56     UINT16 s_tree_height;           /* height of disk tree */
  57     UINT16 s_bmap_nr;               /* amount of bitmap blocks needed to address
  58                                      * each block of file system */
  59
  60     // The reiserfs version number
  61     UINT16 s_version;               /* this field is only reliable on filesystem
  62                                      * with non-standard journal */
  63     UINT16 s_reserved_for_journal;  /* size in blocks of journal area on main
  64                                      * device, we need to keep after
  65                                      * making fs with non-standard journal */
  66 } RFSD_SUPER_BLOCK, *PRFSD_SUPER_BLOCK;
  67 #include <poppack.h>
  68
  69 C_ASSERT(FIELD_OFFSET(RFSD_SUPER_BLOCK, s_blocksize) == 44);
  70 C_ASSERT(FIELD_OFFSET(RFSD_SUPER_BLOCK, s_magic) == 52);
  71
  72 #define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
  73 #define REISERFS_SUPER_MAGIC_STRING "ReIsErFs"
  74 #define REISER2FS_SUPER_MAGIC_STRING "ReIsEr2Fs"
  75 #define REISER2FS_JR_SUPER_MAGIC_STRING "ReIsEr3Fs"
  76 #define MAGIC_KEY_LENGTH 9