]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* Internal data structures for ADFS */ |
2 | ||
3 | #define ADFS_FREE_FRAG 0 | |
4 | #define ADFS_BAD_FRAG 1 | |
5 | #define ADFS_ROOT_FRAG 2 | |
6 | ||
7 | #define ADFS_NDA_OWNER_READ (1 << 0) | |
8 | #define ADFS_NDA_OWNER_WRITE (1 << 1) | |
9 | #define ADFS_NDA_LOCKED (1 << 2) | |
10 | #define ADFS_NDA_DIRECTORY (1 << 3) | |
11 | #define ADFS_NDA_EXECUTE (1 << 4) | |
12 | #define ADFS_NDA_PUBLIC_READ (1 << 5) | |
13 | #define ADFS_NDA_PUBLIC_WRITE (1 << 6) | |
14 | ||
15 | #include <linux/version.h> | |
16 | #include "dir_f.h" | |
17 | ||
18 | struct buffer_head; | |
19 | ||
20 | /* | |
21 | * Directory handling | |
22 | */ | |
23 | struct adfs_dir { | |
24 | struct super_block *sb; | |
25 | ||
26 | int nr_buffers; | |
27 | struct buffer_head *bh[4]; | |
28 | unsigned int pos; | |
29 | unsigned int parent_id; | |
30 | ||
31 | struct adfs_dirheader dirhead; | |
32 | union adfs_dirtail dirtail; | |
33 | }; | |
34 | ||
35 | /* | |
36 | * This is the overall maximum name length | |
37 | */ | |
38 | #define ADFS_MAX_NAME_LEN 256 | |
39 | struct object_info { | |
40 | __u32 parent_id; /* parent object id */ | |
41 | __u32 file_id; /* object id */ | |
42 | __u32 loadaddr; /* load address */ | |
43 | __u32 execaddr; /* execution address */ | |
44 | __u32 size; /* size */ | |
45 | __u8 attr; /* RISC OS attributes */ | |
46 | unsigned char name_len; /* name length */ | |
47 | char name[ADFS_MAX_NAME_LEN];/* file name */ | |
48 | }; | |
49 | ||
50 | struct adfs_dir_ops { | |
51 | int (*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir); | |
52 | int (*setpos)(struct adfs_dir *dir, unsigned int fpos); | |
53 | int (*getnext)(struct adfs_dir *dir, struct object_info *obj); | |
54 | int (*update)(struct adfs_dir *dir, struct object_info *obj); | |
55 | int (*create)(struct adfs_dir *dir, struct object_info *obj); | |
56 | int (*remove)(struct adfs_dir *dir, struct object_info *obj); | |
57 | void (*free)(struct adfs_dir *dir); | |
58 | }; | |
59 | ||
60 | struct adfs_discmap { | |
61 | struct buffer_head *dm_bh; | |
62 | __u32 dm_startblk; | |
63 | unsigned int dm_startbit; | |
64 | unsigned int dm_endbit; | |
65 | }; | |
66 | ||
67 | /* Inode stuff */ | |
68 | struct inode *adfs_iget(struct super_block *sb, struct object_info *obj); | |
69 | int adfs_write_inode(struct inode *inode,int unused); | |
70 | int adfs_notify_change(struct dentry *dentry, struct iattr *attr); | |
71 | ||
72 | /* map.c */ | |
73 | extern int adfs_map_lookup(struct super_block *sb, unsigned int frag_id, unsigned int offset); | |
74 | extern unsigned int adfs_map_free(struct super_block *sb); | |
75 | ||
76 | /* Misc */ | |
77 | void __adfs_error(struct super_block *sb, const char *function, | |
78 | const char *fmt, ...); | |
79 | #define adfs_error(sb, fmt...) __adfs_error(sb, __FUNCTION__, fmt) | |
80 | ||
81 | /* super.c */ | |
82 | ||
83 | /* | |
84 | * Inodes and file operations | |
85 | */ | |
86 | ||
87 | /* dir_*.c */ | |
88 | extern struct inode_operations adfs_dir_inode_operations; | |
89 | extern struct file_operations adfs_dir_operations; | |
90 | extern struct dentry_operations adfs_dentry_operations; | |
91 | extern struct adfs_dir_ops adfs_f_dir_ops; | |
92 | extern struct adfs_dir_ops adfs_fplus_dir_ops; | |
93 | ||
94 | extern int adfs_dir_update(struct super_block *sb, struct object_info *obj); | |
95 | ||
96 | /* file.c */ | |
97 | extern struct inode_operations adfs_file_inode_operations; | |
98 | extern struct file_operations adfs_file_operations; | |
99 | ||
100 | extern inline __u32 signed_asl(__u32 val, signed int shift) | |
101 | { | |
102 | if (shift >= 0) | |
103 | val <<= shift; | |
104 | else | |
105 | val >>= -shift; | |
106 | return val; | |
107 | } | |
108 | ||
109 | /* | |
110 | * Calculate the address of a block in an object given the block offset | |
111 | * and the object identity. | |
112 | * | |
113 | * The root directory ID should always be looked up in the map [3.4] | |
114 | */ | |
115 | extern inline int | |
116 | __adfs_block_map(struct super_block *sb, unsigned int object_id, | |
117 | unsigned int block) | |
118 | { | |
119 | if (object_id & 255) { | |
120 | unsigned int off; | |
121 | ||
122 | off = (object_id & 255) - 1; | |
123 | block += off << ADFS_SB(sb)->s_log2sharesize; | |
124 | } | |
125 | ||
126 | return adfs_map_lookup(sb, object_id >> 8, block); | |
127 | } |