reactos/drivers/filesystems/fs_rec/reiserfs.h

77 lines
3.6 KiB
C

/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS File System Recognizer
* FILE: drivers/filesystems/fs_rec/btrfs.h
* PURPOSE: BTRFS Header File
* PROGRAMMER: Peter Hater
* Pierre Schweitzer (pierre@reactos.org)
*/
#include <pshpack1.h>
struct journal_params {
// Block number of the block containing the first journal node.
UINT32 jp_journal_1st_block; /* where does journal start from on its device */
// Journal device number (?? for if the journal is on a separate drive ??)
UINT32 jp_journal_dev; /* journal device st_rdev */
// Original journal size. (Needed when using partition on systems w/ different default journal sizes).
UINT32 jp_journal_size; /* size of the journal */
UINT32 jp_journal_trans_max; /* max number of blocks in a transaction. */
UINT32 jp_journal_magic; /* random value made on fs creation (this was sb_journal_block_count) */
UINT32 jp_journal_max_batch; /* max number of blocks to batch into a trans */
UINT32 jp_journal_max_commit_age; /* in seconds, how old can an async commit be */
UINT32 jp_journal_max_trans_age; /* in seconds, how old can a transaction be */
};
typedef struct _RFSD_SUPER_BLOCK
{
// The number of blocks in the partition
UINT32 s_blocks_count; /* blocks count */ //[mark] was _s_blocks_count
// The number of free blocks in the partition
UINT32 s_free_blocks_count; /* free blocks count */ //[mark] was _s_free_blocks
// Block number of the block containing the root node
UINT32 s_root_block; /* root block number */
struct journal_params s_journal;
// The size (in bytes) of a block
UINT16 s_blocksize; /* block size */
UINT16 s_oid_maxsize; /* max size of object id array, see get_objectid() commentary */
UINT16 s_oid_cursize; /* current size of object id array */
UINT16 s_umount_state; /* this is set to 1 when filesystem was umounted, to 2 - when not */
char s_magic[10]; /* reiserfs magic string indicates that
* file system is reiserfs:
* "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" */
// State of the partition: valid(1), error (2)
UINT16 s_fs_state; /* it is set to used by fsck to mark which phase of rebuilding is done */
UINT32 s_hash_function_code; /* indicate, what hash function is being use
* to sort names in a directory*/
UINT16 s_tree_height; /* height of disk tree */
UINT16 s_bmap_nr; /* amount of bitmap blocks needed to address
* each block of file system */
// The reiserfs version number
UINT16 s_version; /* this field is only reliable on filesystem
* with non-standard journal */
UINT16 s_reserved_for_journal; /* size in blocks of journal area on main
* device, we need to keep after
* making fs with non-standard journal */
} RFSD_SUPER_BLOCK, *PRFSD_SUPER_BLOCK;
#include <poppack.h>
C_ASSERT(FIELD_OFFSET(RFSD_SUPER_BLOCK, s_blocksize) == 44);
C_ASSERT(FIELD_OFFSET(RFSD_SUPER_BLOCK, s_magic) == 52);
#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
#define REISERFS_SUPER_MAGIC_STRING "ReIsErFs"
#define REISER2FS_SUPER_MAGIC_STRING "ReIsEr2Fs"
#define REISER2FS_JR_SUPER_MAGIC_STRING "ReIsEr3Fs"
#define MAGIC_KEY_LENGTH 9