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#ifndef _MKFS_MFS_CONST_H__
#define _MKFS_MFS_CONST_H__
/* Tables sizes */
#define NR_DZONES 7 /* # direct zone numbers in a V2 inode */
#define NR_TZONES 10 /* total # zone numbers in a V2 inode */
#define MIN_BLOCK_SIZE 1024
#define DEFAULT_BLOCK_SIZE 4096
/* The type of sizeof may be (unsigned) long. Use the following macro for
* taking the sizes of small objects so that there are no surprises like
* (small) long constants being passed to routines expecting an int.
*/
#define usizeof(t) ((unsigned) sizeof(t))
/* File system types: magic number contained in super-block. */
#define SUPER_V3 0x4d5a /* magic # for V3 file systems */
#define SUPER_MAGIC SUPER_V3
/* Miscellaneous constants */
#define SU_UID ((uid_t) 0) /* super_user's uid_t */
#define SECTOR_SIZE 512
#define ROOT_INODE ((ino_t) 1) /* inode number for root directory */
#define BOOT_BLOCK ((blkcnt_t) 0) /* block number of boot block */
#define SUPER_BLOCK_BYTES (1024) /* bytes offset */
#define START_BLOCK ((blkcnt_t) 2) /* first block of FS (not counting SB) */
#define FS_BITMAP_CHUNKS(b) ((b)/usizeof(bitchunk_t)) /*# map chunks/blk*/
#define FS_BITCHUNK_BITS (usizeof(bitchunk_t) * CHAR_BIT)
#define FS_BITS_PER_BLOCK(b) (FS_BITMAP_CHUNKS(b) * FS_BITCHUNK_BITS)
/* Derived sizes pertaining to the file system. */
#define ZONE_NUM_SIZE usizeof (zone_t) /* # bytes in zone */
#define INODE_SIZE usizeof (struct inode) /* bytes in dsk ino */
#define INDIRECTS(b) ((b)/ZONE_NUM_SIZE) /* # zones/indir block */
#define INODES_PER_BLOCK(b) ((b)/INODE_SIZE) /* # V2 dsk inodes/blk */
#define DIR_ENTRY_SIZE usizeof(struct direct) /* # bytes/dir entry */
#define NR_DIR_ENTRIES(b) ((b)/DIR_ENTRY_SIZE) /* # dir entries/blk */
#endif
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