1 /* Tables sizes */
2 #define V1_NR_DZONES 7 /* # direct zone numbers in a V1 inode */
3 #define V1_NR_TZONES 9 /* total # zone numbers in a V1 inode */
4 #define V2_NR_DZONES 7 /* # direct zone numbers in a V2 inode */
5 #define V2_NR_TZONES 10 /* total # zone numbers in a V2 inode */
6
7 #define NR_FILPS 128 /* # slots in filp table */
8 #define NR_INODES 64 /* # slots in "in core" inode table */
9 #define NR_SUPERS 8 /* # slots in super block table */
10 #define NR_LOCKS 8 /* # slots in the file locking table */
11
12 /* The type of sizeof may be (unsigned) long. Use the following macro for
13 * taking the sizes of small objects so that there are no surprises like
14 * (small) long constants being passed to routines expecting an int.
15 */
16 #define usizeof(t) ((unsigned) sizeof(t))
17
18 /* File system types. */
19 #define SUPER_MAGIC 0x137F /* magic number contained in super-block */
20 #define SUPER_REV 0x7F13 /* magic # when 68000 disk read on PC or vv */
21 #define SUPER_V2 0x2468 /* magic # for V2 file systems */
22 #define SUPER_V2_REV 0x6824 /* V2 magic written on PC, read on 68K or vv */
23
24 #define V1 1 /* version number of V1 file systems */
25 #define V2 2 /* version number of V2 file systems */
26
27 /* Miscellaneous constants */
28 #define SU_UID ((uid_t) 0) /* super_user's uid_t */
29 #define SYS_UID ((uid_t) 0) /* uid_t for processes MM and INIT */
30 #define SYS_GID ((gid_t) 0) /* gid_t for processes MM and INIT */
31 #define NORMAL 0 /* forces get_block to do disk read */
32 #define NO_READ 1 /* prevents get_block from doing disk read */
33 #define PREFETCH 2 /* tells get_block not to read or mark dev */
34
35 #define XPIPE (-NR_TASKS-1) /* used in fp_task when susp'd on pipe */
36 #define XOPEN (-NR_TASKS-2) /* used in fp_task when susp'd on open */
37 #define XLOCK (-NR_TASKS-3) /* used in fp_task when susp'd on lock */
38 #define XPOPEN (-NR_TASKS-4) /* used in fp_task when susp'd on pipe open */
39
40 #define NO_BIT ((bit_t) 0) /* returned by alloc_bit() to signal failure */
41
42 #define DUP_MASK 0100 /* mask to distinguish dup2 from dup */
43
44 #define LOOK_UP 0 /* tells search_dir to lookup string */
45 #define ENTER 1 /* tells search_dir to make dir entry */
46 #define DELETE 2 /* tells search_dir to delete entry */
47 #define IS_EMPTY 3 /* tells search_dir to ret. OK or ENOTEMPTY */
48
49 #define CLEAN 0 /* disk and memory copies identical */
50 #define DIRTY 1 /* disk and memory copies differ */
51 #define ATIME 002 /* set if atime field needs updating */
52 #define CTIME 004 /* set if ctime field needs updating */
53 #define MTIME 010 /* set if mtime field needs updating */
54
55 #define BYTE_SWAP 0 /* tells conv2/conv4 to swap bytes */
56 #define DONT_SWAP 1 /* tells conv2/conv4 not to swap bytes */
57
58 #define END_OF_FILE (-104) /* eof detected */
59
60 #define ROOT_INODE 1 /* inode number for root directory */
61 #define BOOT_BLOCK ((block_t) 0) /* block number of boot block */
62 #define SUPER_BLOCK ((block_t) 1) /* block number of super block */
63
64 #define DIR_ENTRY_SIZE usizeof (struct direct) /* # bytes/dir entry */
65 #define NR_DIR_ENTRIES (BLOCK_SIZE/DIR_ENTRY_SIZE) /* # dir entries/blk */
66 #define SUPER_SIZE usizeof (struct super_block) /* super_block size */
67 #define PIPE_SIZE (V1_NR_DZONES*BLOCK_SIZE) /* pipe size in bytes */
68 #define BITMAP_CHUNKS (BLOCK_SIZE/usizeof (bitchunk_t))/* # map chunks/blk */
69
70 /* Derived sizes pertaining to the V1 file system. */
71 #define V1_ZONE_NUM_SIZE usizeof (zone1_t) /* # bytes in V1 zone */
72 #define V1_INODE_SIZE usizeof (d1_inode) /* bytes in V1 dsk ino */
73 #define V1_INDIRECTS (BLOCK_SIZE/V1_ZONE_NUM_SIZE) /* # zones/indir block */
74 #define V1_INODES_PER_BLOCK (BLOCK_SIZE/V1_INODE_SIZE)/* # V1 dsk inodes/blk */
75
76 /* Derived sizes pertaining to the V2 file system. */
77 #define V2_ZONE_NUM_SIZE usizeof (zone_t) /* # bytes in V2 zone */
78 #define V2_INODE_SIZE usizeof (d2_inode) /* bytes in V2 dsk ino */
79 #define V2_INDIRECTS (BLOCK_SIZE/V2_ZONE_NUM_SIZE) /* # zones/indir block */
80 #define V2_INODES_PER_BLOCK (BLOCK_SIZE/V2_INODE_SIZE)/* # V2 dsk inodes/blk */
81
82 #define printf printk
83
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