Commit | Line | Data |
---|---|---|
608ba50b AV |
1 | #include <linux/fs.h> |
2 | #include <linux/adfs_fs.h> | |
3 | ||
1da177e4 LT |
4 | /* Internal data structures for ADFS */ |
5 | ||
6 | #define ADFS_FREE_FRAG 0 | |
7 | #define ADFS_BAD_FRAG 1 | |
8 | #define ADFS_ROOT_FRAG 2 | |
9 | ||
10 | #define ADFS_NDA_OWNER_READ (1 << 0) | |
11 | #define ADFS_NDA_OWNER_WRITE (1 << 1) | |
12 | #define ADFS_NDA_LOCKED (1 << 2) | |
13 | #define ADFS_NDA_DIRECTORY (1 << 3) | |
14 | #define ADFS_NDA_EXECUTE (1 << 4) | |
15 | #define ADFS_NDA_PUBLIC_READ (1 << 5) | |
16 | #define ADFS_NDA_PUBLIC_WRITE (1 << 6) | |
17 | ||
1da177e4 LT |
18 | #include "dir_f.h" |
19 | ||
20 | struct buffer_head; | |
21 | ||
608ba50b AV |
22 | /* |
23 | * adfs file system inode data in memory | |
24 | */ | |
25 | struct adfs_inode_info { | |
26 | loff_t mmu_private; | |
27 | unsigned long parent_id; /* object id of parent */ | |
28 | __u32 loadaddr; /* RISC OS load address */ | |
29 | __u32 execaddr; /* RISC OS exec address */ | |
30 | unsigned int filetype; /* RISC OS file type */ | |
31 | unsigned int attr; /* RISC OS permissions */ | |
32 | unsigned int stamped:1; /* RISC OS file has date/time */ | |
33 | struct inode vfs_inode; | |
34 | }; | |
35 | ||
36 | /* | |
37 | * Forward-declare this | |
38 | */ | |
39 | struct adfs_discmap; | |
40 | struct adfs_dir_ops; | |
41 | ||
42 | /* | |
43 | * ADFS file system superblock data in memory | |
44 | */ | |
45 | struct adfs_sb_info { | |
46 | struct adfs_discmap *s_map; /* bh list containing map */ | |
47 | struct adfs_dir_ops *s_dir; /* directory operations */ | |
48 | ||
49 | uid_t s_uid; /* owner uid */ | |
50 | gid_t s_gid; /* owner gid */ | |
51 | umode_t s_owner_mask; /* ADFS owner perm -> unix perm */ | |
52 | umode_t s_other_mask; /* ADFS other perm -> unix perm */ | |
53 | ||
54 | __u32 s_ids_per_zone; /* max. no ids in one zone */ | |
55 | __u32 s_idlen; /* length of ID in map */ | |
56 | __u32 s_map_size; /* sector size of a map */ | |
57 | unsigned long s_size; /* total size (in blocks) of this fs */ | |
58 | signed int s_map2blk; /* shift left by this for map->sector */ | |
59 | unsigned int s_log2sharesize;/* log2 share size */ | |
60 | __le32 s_version; /* disc format version */ | |
61 | unsigned int s_namelen; /* maximum number of characters in name */ | |
62 | }; | |
63 | ||
64 | static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb) | |
65 | { | |
66 | return sb->s_fs_info; | |
67 | } | |
68 | ||
69 | static inline struct adfs_inode_info *ADFS_I(struct inode *inode) | |
70 | { | |
71 | return container_of(inode, struct adfs_inode_info, vfs_inode); | |
72 | } | |
73 | ||
1da177e4 LT |
74 | /* |
75 | * Directory handling | |
76 | */ | |
77 | struct adfs_dir { | |
78 | struct super_block *sb; | |
79 | ||
80 | int nr_buffers; | |
81 | struct buffer_head *bh[4]; | |
82 | unsigned int pos; | |
83 | unsigned int parent_id; | |
84 | ||
85 | struct adfs_dirheader dirhead; | |
86 | union adfs_dirtail dirtail; | |
87 | }; | |
88 | ||
89 | /* | |
90 | * This is the overall maximum name length | |
91 | */ | |
92 | #define ADFS_MAX_NAME_LEN 256 | |
93 | struct object_info { | |
94 | __u32 parent_id; /* parent object id */ | |
95 | __u32 file_id; /* object id */ | |
96 | __u32 loadaddr; /* load address */ | |
97 | __u32 execaddr; /* execution address */ | |
98 | __u32 size; /* size */ | |
99 | __u8 attr; /* RISC OS attributes */ | |
100 | unsigned char name_len; /* name length */ | |
101 | char name[ADFS_MAX_NAME_LEN];/* file name */ | |
102 | }; | |
103 | ||
104 | struct adfs_dir_ops { | |
105 | int (*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir); | |
106 | int (*setpos)(struct adfs_dir *dir, unsigned int fpos); | |
107 | int (*getnext)(struct adfs_dir *dir, struct object_info *obj); | |
108 | int (*update)(struct adfs_dir *dir, struct object_info *obj); | |
109 | int (*create)(struct adfs_dir *dir, struct object_info *obj); | |
110 | int (*remove)(struct adfs_dir *dir, struct object_info *obj); | |
ffdc9064 | 111 | int (*sync)(struct adfs_dir *dir); |
1da177e4 LT |
112 | void (*free)(struct adfs_dir *dir); |
113 | }; | |
114 | ||
115 | struct adfs_discmap { | |
116 | struct buffer_head *dm_bh; | |
117 | __u32 dm_startblk; | |
118 | unsigned int dm_startbit; | |
119 | unsigned int dm_endbit; | |
120 | }; | |
121 | ||
122 | /* Inode stuff */ | |
123 | struct inode *adfs_iget(struct super_block *sb, struct object_info *obj); | |
a9185b41 | 124 | int adfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
1da177e4 LT |
125 | int adfs_notify_change(struct dentry *dentry, struct iattr *attr); |
126 | ||
127 | /* map.c */ | |
128 | extern int adfs_map_lookup(struct super_block *sb, unsigned int frag_id, unsigned int offset); | |
129 | extern unsigned int adfs_map_free(struct super_block *sb); | |
130 | ||
131 | /* Misc */ | |
132 | void __adfs_error(struct super_block *sb, const char *function, | |
133 | const char *fmt, ...); | |
8e24eea7 | 134 | #define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt) |
1da177e4 LT |
135 | |
136 | /* super.c */ | |
137 | ||
138 | /* | |
139 | * Inodes and file operations | |
140 | */ | |
141 | ||
142 | /* dir_*.c */ | |
754661f1 | 143 | extern const struct inode_operations adfs_dir_inode_operations; |
4b6f5d20 | 144 | extern const struct file_operations adfs_dir_operations; |
e16404ed | 145 | extern const struct dentry_operations adfs_dentry_operations; |
1da177e4 LT |
146 | extern struct adfs_dir_ops adfs_f_dir_ops; |
147 | extern struct adfs_dir_ops adfs_fplus_dir_ops; | |
148 | ||
ffdc9064 AV |
149 | extern int adfs_dir_update(struct super_block *sb, struct object_info *obj, |
150 | int wait); | |
1da177e4 LT |
151 | |
152 | /* file.c */ | |
754661f1 | 153 | extern const struct inode_operations adfs_file_inode_operations; |
4b6f5d20 | 154 | extern const struct file_operations adfs_file_operations; |
1da177e4 | 155 | |
e0c93142 | 156 | static inline __u32 signed_asl(__u32 val, signed int shift) |
1da177e4 LT |
157 | { |
158 | if (shift >= 0) | |
159 | val <<= shift; | |
160 | else | |
161 | val >>= -shift; | |
162 | return val; | |
163 | } | |
164 | ||
165 | /* | |
166 | * Calculate the address of a block in an object given the block offset | |
167 | * and the object identity. | |
168 | * | |
169 | * The root directory ID should always be looked up in the map [3.4] | |
170 | */ | |
e0c93142 | 171 | static inline int |
1da177e4 LT |
172 | __adfs_block_map(struct super_block *sb, unsigned int object_id, |
173 | unsigned int block) | |
174 | { | |
175 | if (object_id & 255) { | |
176 | unsigned int off; | |
177 | ||
178 | off = (object_id & 255) - 1; | |
179 | block += off << ADFS_SB(sb)->s_log2sharesize; | |
180 | } | |
181 | ||
182 | return adfs_map_lookup(sb, object_id >> 8, block); | |
183 | } |