Root/
1 | #include <linux/fs.h> |
2 | #include <linux/adfs_fs.h> |
3 | |
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 | |
18 | #include "dir_f.h" |
19 | |
20 | struct buffer_head; |
21 | |
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 | |
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); |
111 | int (*sync)(struct adfs_dir *dir); |
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); |
124 | int adfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
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, ...); |
134 | #define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt) |
135 | |
136 | /* super.c */ |
137 | |
138 | /* |
139 | * Inodes and file operations |
140 | */ |
141 | |
142 | /* dir_*.c */ |
143 | extern const struct inode_operations adfs_dir_inode_operations; |
144 | extern const struct file_operations adfs_dir_operations; |
145 | extern const struct dentry_operations adfs_dentry_operations; |
146 | extern struct adfs_dir_ops adfs_f_dir_ops; |
147 | extern struct adfs_dir_ops adfs_fplus_dir_ops; |
148 | |
149 | extern int adfs_dir_update(struct super_block *sb, struct object_info *obj, |
150 | int wait); |
151 | |
152 | /* file.c */ |
153 | extern const struct inode_operations adfs_file_inode_operations; |
154 | extern const struct file_operations adfs_file_operations; |
155 | |
156 | static inline __u32 signed_asl(__u32 val, signed int shift) |
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 | */ |
171 | static inline int |
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 | } |
184 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9