98 lines
4.2 KiB
C
98 lines
4.2 KiB
C
|
/* Tables sizes */
|
||
|
|
#define V1_NR_DZONES 7 /* # direct zone numbers in a V1 inode */
|
||
|
|
#define V1_NR_TZONES 9 /* total # zone numbers in a V1 inode */
|
||
|
|
#define V2_NR_DZONES 7 /* # direct zone numbers in a V2 inode */
|
||
|
|
#define V2_NR_TZONES 10 /* total # zone numbers in a V2 inode */
|
||
|
|
|
||
|
|
#define NR_INODES 256 /* # slots in "in core" inode table */
|
||
|
|
#define GETDENTS_BUFSIZ 257
|
||
|
|
|
||
|
|
#define INODE_HASH_LOG2 7 /* 2 based logarithm of the inode hash size */
|
||
|
|
#define INODE_HASH_SIZE ((unsigned long)1<<INODE_HASH_LOG2)
|
||
|
|
#define INODE_HASH_MASK (((unsigned long)1<<INODE_HASH_LOG2)-1)
|
||
|
|
#define INODE_MAP_SIZE INODE_HASH_LOG2
|
||
|
|
|
||
|
|
|
||
|
|
/* 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. */
|
||
|
|
#define SUPER_MAGIC 0x137F /* magic number contained in super-block */
|
||
|
|
#define SUPER_REV 0x7F13 /* magic # when 68000 disk read on PC or vv */
|
||
|
|
#define SUPER_V2 0x2468 /* magic # for V2 file systems */
|
||
|
|
#define SUPER_V2_REV 0x6824 /* V2 magic written on PC, read on 68K or vv */
|
||
|
|
#define SUPER_V3 0x4d5a /* magic # for V3 file systems */
|
||
|
|
|
||
|
|
#define V1 1 /* version number of V1 file systems */
|
||
|
|
#define V2 2 /* version number of V2 file systems */
|
||
|
|
#define V3 3 /* version number of V3 file systems */
|
||
|
|
|
||
|
|
/* Miscellaneous constants */
|
||
|
|
#define SU_UID ((uid_t) 0) /* super_user's uid_t */
|
||
|
|
#define SYS_UID ((uid_t) 0) /* uid_t for processes MM and INIT */
|
||
|
|
#define SYS_GID ((gid_t) 0) /* gid_t for processes MM and INIT */
|
||
|
|
#define NORMAL 0 /* forces get_block to do disk read */
|
||
|
|
#define NO_READ 1 /* prevents get_block from doing disk read */
|
||
|
|
#define PREFETCH 2 /* tells get_block not to read or mark dev */
|
||
|
|
|
||
|
|
#define NO_BIT ((bit_t) 0) /* returned by alloc_bit() to signal failure */
|
||
|
|
|
||
|
|
/* write_map() args */
|
||
|
|
#define WMAP_FREE (1 << 0)
|
||
|
|
|
||
|
|
#define IGN_PERM 0
|
||
|
|
#define CHK_PERM 1
|
||
|
|
|
||
|
|
#define CLEAN 0 /* disk and memory copies identical */
|
||
|
|
#define DIRTY 1 /* disk and memory copies differ */
|
||
|
|
#define ATIME 002 /* set if atime field needs updating */
|
||
|
|
#define CTIME 004 /* set if ctime field needs updating */
|
||
|
|
#define MTIME 010 /* set if mtime field needs updating */
|
||
|
|
|
||
|
|
#define BYTE_SWAP 0 /* tells conv2/conv4 to swap bytes */
|
||
|
|
|
||
|
|
#define END_OF_FILE (-104) /* eof detected */
|
||
|
|
|
||
|
|
#define ROOT_INODE 1 /* inode number for root directory */
|
||
|
|
#define BOOT_BLOCK ((block_t) 0) /* block number of boot block */
|
||
|
|
#define SUPER_BLOCK_BYTES (1024) /* bytes offset */
|
||
|
|
#define START_BLOCK 2 /* first block of FS (not counting SB) */
|
||
|
|
|
||
|
|
#define DIR_ENTRY_SIZE usizeof (struct direct) /* # bytes/dir entry */
|
||
|
|
#define NR_DIR_ENTRIES(b) ((b)/DIR_ENTRY_SIZE) /* # dir entries/blk */
|
||
|
|
#define SUPER_SIZE usizeof (struct super_block) /* super_block size */
|
||
|
|
#define PIPE_SIZE(b) (V1_NR_DZONES*(b)) /* pipe size in bytes */
|
||
|
|
|
||
|
|
#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 V1 file system. */
|
||
|
|
#define V1_ZONE_NUM_SIZE usizeof (zone1_t) /* # bytes in V1 zone */
|
||
|
|
#define V1_INODE_SIZE usizeof (d1_inode) /* bytes in V1 dsk ino */
|
||
|
|
|
||
|
|
/* # zones/indir block */
|
||
|
|
#define V1_INDIRECTS (_STATIC_BLOCK_SIZE/V1_ZONE_NUM_SIZE)
|
||
|
|
|
||
|
|
/* # V1 dsk inodes/blk */
|
||
|
|
#define V1_INODES_PER_BLOCK (_STATIC_BLOCK_SIZE/V1_INODE_SIZE)
|
||
|
|
|
||
|
|
/* Derived sizes pertaining to the V2 file system. */
|
||
|
|
#define V2_ZONE_NUM_SIZE usizeof (zone_t) /* # bytes in V2 zone */
|
||
|
|
#define V2_INODE_SIZE usizeof (d2_inode) /* bytes in V2 dsk ino */
|
||
|
|
#define V2_INDIRECTS(b) ((b)/V2_ZONE_NUM_SIZE) /* # zones/indir block */
|
||
|
|
#define V2_INODES_PER_BLOCK(b) ((b)/V2_INODE_SIZE)/* # V2 dsk inodes/blk */
|
||
|
|
|
||
|
|
#define PFS_MIN(a,b) pfs_min_f(__FILE__,__LINE__,(a), (b))
|
||
|
|
#define PFS_NUL(str,l,m) pfs_nul_f(__FILE__,__LINE__,(str), (l), (m))
|
||
|
|
|
||
|
|
/* Args to dev_bio/dev_io */
|
||
|
|
#define PFS_DEV_READ 10001
|
||
|
|
#define PFS_DEV_WRITE 10002
|
||
|
|
#define PFS_DEV_SCATTER 10003
|
||
|
|
#define PFS_DEV_GATHER 10004
|
||
|
|
|