1*433d6423SLionel Sambuc #ifndef _MKFS_MFS_CONST_H__ 2*433d6423SLionel Sambuc #define _MKFS_MFS_CONST_H__ 3*433d6423SLionel Sambuc 4*433d6423SLionel Sambuc /* Tables sizes */ 5*433d6423SLionel Sambuc #define NR_DZONES 7 /* # direct zone numbers in a V2 inode */ 6*433d6423SLionel Sambuc #define NR_TZONES 10 /* total # zone numbers in a V2 inode */ 7*433d6423SLionel Sambuc 8*433d6423SLionel Sambuc #define MIN_BLOCK_SIZE 1024 9*433d6423SLionel Sambuc #define DEFAULT_BLOCK_SIZE 4096 10*433d6423SLionel Sambuc 11*433d6423SLionel Sambuc /* The type of sizeof may be (unsigned) long. Use the following macro for 12*433d6423SLionel Sambuc * taking the sizes of small objects so that there are no surprises like 13*433d6423SLionel Sambuc * (small) long constants being passed to routines expecting an int. 14*433d6423SLionel Sambuc */ 15*433d6423SLionel Sambuc #define usizeof(t) ((unsigned) sizeof(t)) 16*433d6423SLionel Sambuc 17*433d6423SLionel Sambuc /* File system types: magic number contained in super-block. */ 18*433d6423SLionel Sambuc #define SUPER_V3 0x4d5a /* magic # for V3 file systems */ 19*433d6423SLionel Sambuc #define SUPER_MAGIC SUPER_V3 20*433d6423SLionel Sambuc 21*433d6423SLionel Sambuc /* Miscellaneous constants */ 22*433d6423SLionel Sambuc #define SU_UID ((uid_t) 0) /* super_user's uid_t */ 23*433d6423SLionel Sambuc #define SECTOR_SIZE 512 24*433d6423SLionel Sambuc 25*433d6423SLionel Sambuc #define ROOT_INODE ((ino_t) 1) /* inode number for root directory */ 26*433d6423SLionel Sambuc 27*433d6423SLionel Sambuc #define BOOT_BLOCK ((blkcnt_t) 0) /* block number of boot block */ 28*433d6423SLionel Sambuc #define SUPER_BLOCK_BYTES (1024) /* bytes offset */ 29*433d6423SLionel Sambuc #define START_BLOCK ((blkcnt_t) 2) /* first block of FS (not counting SB) */ 30*433d6423SLionel Sambuc 31*433d6423SLionel Sambuc #define FS_BITMAP_CHUNKS(b) ((b)/usizeof(bitchunk_t)) /*# map chunks/blk*/ 32*433d6423SLionel Sambuc #define FS_BITCHUNK_BITS (usizeof(bitchunk_t) * CHAR_BIT) 33*433d6423SLionel Sambuc #define FS_BITS_PER_BLOCK(b) (FS_BITMAP_CHUNKS(b) * FS_BITCHUNK_BITS) 34*433d6423SLionel Sambuc 35*433d6423SLionel Sambuc /* Derived sizes pertaining to the file system. */ 36*433d6423SLionel Sambuc #define ZONE_NUM_SIZE usizeof (zone_t) /* # bytes in zone */ 37*433d6423SLionel Sambuc #define INODE_SIZE usizeof (struct inode) /* bytes in dsk ino */ 38*433d6423SLionel Sambuc #define INDIRECTS(b) ((b)/ZONE_NUM_SIZE) /* # zones/indir block */ 39*433d6423SLionel Sambuc #define INODES_PER_BLOCK(b) ((b)/INODE_SIZE) /* # V2 dsk inodes/blk */ 40*433d6423SLionel Sambuc 41*433d6423SLionel Sambuc #define DIR_ENTRY_SIZE usizeof(struct direct) /* # bytes/dir entry */ 42*433d6423SLionel Sambuc #define NR_DIR_ENTRIES(b) ((b)/DIR_ENTRY_SIZE) /* # dir entries/blk */ 43*433d6423SLionel Sambuc #endif 44