blob: 05af6e42a22e8812d2298b745d6978f510ae8c37 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
/*
* linux/fs/xiafs/xiafs_mac.h
*
* Copyright (C) Q. Frank Xia, 1993.
*/
extern char internal_error_message[];
#define INTERN_ERR internal_error_message, __FILE__, __LINE__
#define WHERE_ERR __FILE__, __LINE__
#define XIAFS_ZSHIFT(sp) ((sp)->u.xiafs_sb.s_zone_shift)
#define XIAFS_ZSIZE(sp) (BLOCK_SIZE << XIAFS_ZSHIFT(sp))
#define XIAFS_ZSIZE_BITS(sp) (BLOCK_SIZE_BITS + XIAFS_ZSHIFT(sp))
#define XIAFS_ADDRS_PER_Z(sp) (BLOCK_SIZE >> (2 - XIAFS_ZSHIFT(sp)))
#define XIAFS_ADDRS_PER_Z_BITS(sp) (BLOCK_SIZE_BITS - 2 + XIAFS_ZSHIFT(sp))
#define XIAFS_BITS_PER_Z(sp) (BLOCK_SIZE << (3 + XIAFS_ZSHIFT(sp)))
#define XIAFS_BITS_PER_Z_BITS(sp) (BLOCK_SIZE_BITS + 3 + XIAFS_ZSHIFT(sp))
#define XIAFS_INODES_PER_Z(sp) (_XIAFS_INODES_PER_BLOCK << XIAFS_ZSHIFT(sp))
/* Use the most significant bytes of zone pointers to store block counter. */
/* This is ugly, but it works. Note, We have another 7 bytes for "expansion". */
#define XIAFS_GET_BLOCKS(row_ip, blocks) \
blocks=((((row_ip)->i_zone[0] >> 24) & 0xff )|\
(((row_ip)->i_zone[1] >> 16) & 0xff00 )|\
(((row_ip)->i_zone[2] >> 8) & 0xff0000 ) )
/* XIAFS_PUT_BLOCKS should be called before saving zone pointers */
#define XIAFS_PUT_BLOCKS(row_ip, blocks) \
(row_ip)->i_zone[2]=((blocks)<< 8) & 0xff000000;\
(row_ip)->i_zone[1]=((blocks)<<16) & 0xff000000;\
(row_ip)->i_zone[0]=((blocks)<<24) & 0xff000000
|
