44 lines
1.6 KiB
C
44 lines
1.6 KiB
C
#ifndef __PFS_CONST_H__
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#define __PFS_CONST_H__
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#define NR_INODES 256 /* # slots in "in core" inode table */
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/* Size of descriptor table for unix domain sockets. This should be
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* equal to the maximum number of minor devices (currently 256).
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*/
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#define NR_FDS 256
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#define INODE_HASH_LOG2 7 /* 2 based logarithm of the inode hash size */
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#define INODE_HASH_SIZE ((unsigned long)1<<INODE_HASH_LOG2)
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#define INODE_HASH_MASK (((unsigned long)1<<INODE_HASH_LOG2)-1)
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/* The type of sizeof may be (unsigned) long. Use the following macro for
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* taking the sizes of small objects so that there are no surprises like
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* (small) long constants being passed to routines expecting an int.
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*/
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#define usizeof(t) ((unsigned) sizeof(t))
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/* Miscellaneous constants */
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#define INVAL_UID ((uid_t) -1) /* Invalid user ID */
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#define INVAL_GID ((gid_t) -1) /* Invalid group ID */
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#define NORMAL 0 /* forces get_block to do disk read */
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#define NO_READ 1 /* prevents get_block from doing disk read */
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#define PREFETCH 2 /* tells get_block not to read or mark dev */
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#define NO_BIT ((bit_t) 0) /* returned by alloc_bit() to signal failure */
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#define ATIME 002 /* set if atime field needs updating */
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#define CTIME 004 /* set if ctime field needs updating */
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#define MTIME 010 /* set if mtime field needs updating */
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#define FS_BITMAP_CHUNKS(b) ((b)/usizeof (bitchunk_t))/* # map chunks/blk */
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#define FS_BITCHUNK_BITS (usizeof(bitchunk_t) * CHAR_BIT)
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#define FS_BITS_PER_BLOCK(b) (FS_BITMAP_CHUNKS(b) * FS_BITCHUNK_BITS)
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#define FS_CALL_VEC_SIZE 31
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#define DEV_CALL_VEC_SIZE 25
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#endif
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