Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _ADFS_FS_H
2#define _ADFS_FS_H
3
4#include <linux/types.h>
5
6/*
7 * Disc Record at disc address 0xc00
8 */
9struct adfs_discrecord {
10 __u8 log2secsize;
11 __u8 secspertrack;
12 __u8 heads;
13 __u8 density;
14 __u8 idlen;
15 __u8 log2bpmb;
16 __u8 skew;
17 __u8 bootoption;
18 __u8 lowsector;
19 __u8 nzones;
20 __le16 zone_spare;
21 __le32 root;
22 __le32 disc_size;
23 __le16 disc_id;
24 __u8 disc_name[10];
25 __le32 disc_type;
26 __le32 disc_size_high;
27 __u8 log2sharesize:4;
28 __u8 unused40:4;
29 __u8 big_flag:1;
30 __u8 unused41:1;
31 __u8 nzones_high;
32 __le32 format_version;
33 __le32 root_size;
34 __u8 unused52[60 - 52];
35};
36
37#define ADFS_DISCRECORD (0xc00)
38#define ADFS_DR_OFFSET (0x1c0)
39#define ADFS_DR_SIZE 60
40#define ADFS_DR_SIZE_BITS (ADFS_DR_SIZE << 3)
41#define ADFS_SUPER_MAGIC 0xadf5
42
43#ifdef __KERNEL__
44#include <linux/adfs_fs_i.h>
45#include <linux/adfs_fs_sb.h>
46/*
47 * Calculate the boot block checksum on an ADFS drive. Note that this will
48 * appear to be correct if the sector contains all zeros, so also check that
49 * the disk size is non-zero!!!
50 */
51static inline int adfs_checkbblk(unsigned char *ptr)
52{
53 unsigned int result = 0;
54 unsigned char *p = ptr + 511;
55
56 do {
57 result = (result & 0xff) + (result >> 8);
58 result = result + *--p;
59 } while (p != ptr);
60
61 return (result & 0xff) != ptr[511];
62}
63
64static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb)
65{
66 return sb->s_fs_info;
67}
68
69static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
70{
71 return container_of(inode, struct adfs_inode_info, vfs_inode);
72}
73
74#endif
75
76#endif