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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
20struct buffer_head;
21
22/*
23 * adfs file system inode data in memory
24 */
25struct 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 */
39struct adfs_discmap;
40struct adfs_dir_ops;
41
42/*
43 * ADFS file system superblock data in memory
44 */
45struct 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 int s_ftsuffix; /* ,xyz hex filetype suffix option */
54
55 __u32 s_ids_per_zone; /* max. no ids in one zone */
56 __u32 s_idlen; /* length of ID in map */
57 __u32 s_map_size; /* sector size of a map */
58 unsigned long s_size; /* total size (in blocks) of this fs */
59 signed int s_map2blk; /* shift left by this for map->sector */
60 unsigned int s_log2sharesize;/* log2 share size */
61 __le32 s_version; /* disc format version */
62 unsigned int s_namelen; /* maximum number of characters in name */
63};
64
65static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb)
66{
67 return sb->s_fs_info;
68}
69
70static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
71{
72 return container_of(inode, struct adfs_inode_info, vfs_inode);
73}
74
75/*
76 * Directory handling
77 */
78struct adfs_dir {
79 struct super_block *sb;
80
81 int nr_buffers;
82 struct buffer_head *bh[4];
83
84 /* big directories need allocated buffers */
85 struct buffer_head **bh_fplus;
86
87 unsigned int pos;
88 unsigned int parent_id;
89
90 struct adfs_dirheader dirhead;
91 union adfs_dirtail dirtail;
92};
93
94/*
95 * This is the overall maximum name length
96 */
97#define ADFS_MAX_NAME_LEN (256 + 4) /* +4 for ,xyz hex filetype suffix */
98struct object_info {
99 __u32 parent_id; /* parent object id */
100 __u32 file_id; /* object id */
101 __u32 loadaddr; /* load address */
102 __u32 execaddr; /* execution address */
103 __u32 size; /* size */
104 __u8 attr; /* RISC OS attributes */
105 unsigned int name_len; /* name length */
106 char name[ADFS_MAX_NAME_LEN];/* file name */
107
108 /* RISC OS file type (12-bit: derived from loadaddr) */
109 __u16 filetype;
110};
111
112/* RISC OS 12-bit filetype converts to ,xyz hex filename suffix */
113static inline int append_filetype_suffix(char *buf, __u16 filetype)
114{
115 if (filetype == 0xffff) /* no explicit 12-bit file type was set */
116 return 0;
117
118 *buf++ = ',';
119 *buf++ = hex_asc_lo(filetype >> 8);
120 *buf++ = hex_asc_lo(filetype >> 4);
121 *buf++ = hex_asc_lo(filetype >> 0);
122 return 4;
123}
124
125struct adfs_dir_ops {
126 int (*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir);
127 int (*setpos)(struct adfs_dir *dir, unsigned int fpos);
128 int (*getnext)(struct adfs_dir *dir, struct object_info *obj);
129 int (*update)(struct adfs_dir *dir, struct object_info *obj);
130 int (*create)(struct adfs_dir *dir, struct object_info *obj);
131 int (*remove)(struct adfs_dir *dir, struct object_info *obj);
132 int (*sync)(struct adfs_dir *dir);
133 void (*free)(struct adfs_dir *dir);
134};
135
136struct adfs_discmap {
137 struct buffer_head *dm_bh;
138 __u32 dm_startblk;
139 unsigned int dm_startbit;
140 unsigned int dm_endbit;
141};
142
143/* Inode stuff */
144struct inode *adfs_iget(struct super_block *sb, struct object_info *obj);
145int adfs_write_inode(struct inode *inode, struct writeback_control *wbc);
146int adfs_notify_change(struct dentry *dentry, struct iattr *attr);
147
148/* map.c */
149extern int adfs_map_lookup(struct super_block *sb, unsigned int frag_id, unsigned int offset);
150extern unsigned int adfs_map_free(struct super_block *sb);
151
152/* Misc */
153void __adfs_error(struct super_block *sb, const char *function,
154 const char *fmt, ...);
155#define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt)
156
157/* super.c */
158
159/*
160 * Inodes and file operations
161 */
162
163/* dir_*.c */
164extern const struct inode_operations adfs_dir_inode_operations;
165extern const struct file_operations adfs_dir_operations;
166extern const struct dentry_operations adfs_dentry_operations;
167extern struct adfs_dir_ops adfs_f_dir_ops;
168extern struct adfs_dir_ops adfs_fplus_dir_ops;
169
170extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
171 int wait);
172
173/* file.c */
174extern const struct inode_operations adfs_file_inode_operations;
175extern const struct file_operations adfs_file_operations;
176
177static inline __u32 signed_asl(__u32 val, signed int shift)
178{
179 if (shift >= 0)
180 val <<= shift;
181 else
182 val >>= -shift;
183 return val;
184}
185
186/*
187 * Calculate the address of a block in an object given the block offset
188 * and the object identity.
189 *
190 * The root directory ID should always be looked up in the map [3.4]
191 */
192static inline int
193__adfs_block_map(struct super_block *sb, unsigned int object_id,
194 unsigned int block)
195{
196 if (object_id & 255) {
197 unsigned int off;
198
199 off = (object_id & 255) - 1;
200 block += off << ADFS_SB(sb)->s_log2sharesize;
201 }
202
203 return adfs_map_lookup(sb, object_id >> 8, block);
204}
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
20struct buffer_head;
21
22/*
23 * adfs file system inode data in memory
24 */
25struct 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 */
39struct adfs_discmap;
40struct adfs_dir_ops;
41
42/*
43 * ADFS file system superblock data in memory
44 */
45struct adfs_sb_info {
46 union { struct {
47 struct adfs_discmap *s_map; /* bh list containing map */
48 struct adfs_dir_ops *s_dir; /* directory operations */
49 };
50 struct rcu_head rcu; /* used only at shutdown time */
51 };
52 kuid_t s_uid; /* owner uid */
53 kgid_t s_gid; /* owner gid */
54 umode_t s_owner_mask; /* ADFS owner perm -> unix perm */
55 umode_t s_other_mask; /* ADFS other perm -> unix perm */
56 int s_ftsuffix; /* ,xyz hex filetype suffix option */
57
58 __u32 s_ids_per_zone; /* max. no ids in one zone */
59 __u32 s_idlen; /* length of ID in map */
60 __u32 s_map_size; /* sector size of a map */
61 unsigned long s_size; /* total size (in blocks) of this fs */
62 signed int s_map2blk; /* shift left by this for map->sector */
63 unsigned int s_log2sharesize;/* log2 share size */
64 __le32 s_version; /* disc format version */
65 unsigned int s_namelen; /* maximum number of characters in name */
66};
67
68static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb)
69{
70 return sb->s_fs_info;
71}
72
73static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
74{
75 return container_of(inode, struct adfs_inode_info, vfs_inode);
76}
77
78/*
79 * Directory handling
80 */
81struct adfs_dir {
82 struct super_block *sb;
83
84 int nr_buffers;
85 struct buffer_head *bh[4];
86
87 /* big directories need allocated buffers */
88 struct buffer_head **bh_fplus;
89
90 unsigned int pos;
91 unsigned int parent_id;
92
93 struct adfs_dirheader dirhead;
94 union adfs_dirtail dirtail;
95};
96
97/*
98 * This is the overall maximum name length
99 */
100#define ADFS_MAX_NAME_LEN (256 + 4) /* +4 for ,xyz hex filetype suffix */
101struct object_info {
102 __u32 parent_id; /* parent object id */
103 __u32 file_id; /* object id */
104 __u32 loadaddr; /* load address */
105 __u32 execaddr; /* execution address */
106 __u32 size; /* size */
107 __u8 attr; /* RISC OS attributes */
108 unsigned int name_len; /* name length */
109 char name[ADFS_MAX_NAME_LEN];/* file name */
110
111 /* RISC OS file type (12-bit: derived from loadaddr) */
112 __u16 filetype;
113};
114
115/* RISC OS 12-bit filetype converts to ,xyz hex filename suffix */
116static inline int append_filetype_suffix(char *buf, __u16 filetype)
117{
118 if (filetype == 0xffff) /* no explicit 12-bit file type was set */
119 return 0;
120
121 *buf++ = ',';
122 *buf++ = hex_asc_lo(filetype >> 8);
123 *buf++ = hex_asc_lo(filetype >> 4);
124 *buf++ = hex_asc_lo(filetype >> 0);
125 return 4;
126}
127
128struct adfs_dir_ops {
129 int (*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir);
130 int (*setpos)(struct adfs_dir *dir, unsigned int fpos);
131 int (*getnext)(struct adfs_dir *dir, struct object_info *obj);
132 int (*update)(struct adfs_dir *dir, struct object_info *obj);
133 int (*create)(struct adfs_dir *dir, struct object_info *obj);
134 int (*remove)(struct adfs_dir *dir, struct object_info *obj);
135 int (*sync)(struct adfs_dir *dir);
136 void (*free)(struct adfs_dir *dir);
137};
138
139struct adfs_discmap {
140 struct buffer_head *dm_bh;
141 __u32 dm_startblk;
142 unsigned int dm_startbit;
143 unsigned int dm_endbit;
144};
145
146/* Inode stuff */
147struct inode *adfs_iget(struct super_block *sb, struct object_info *obj);
148int adfs_write_inode(struct inode *inode, struct writeback_control *wbc);
149int adfs_notify_change(struct dentry *dentry, struct iattr *attr);
150
151/* map.c */
152extern int adfs_map_lookup(struct super_block *sb, unsigned int frag_id, unsigned int offset);
153extern unsigned int adfs_map_free(struct super_block *sb);
154
155/* Misc */
156void __adfs_error(struct super_block *sb, const char *function,
157 const char *fmt, ...);
158#define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt)
159
160/* super.c */
161
162/*
163 * Inodes and file operations
164 */
165
166/* dir_*.c */
167extern const struct inode_operations adfs_dir_inode_operations;
168extern const struct file_operations adfs_dir_operations;
169extern const struct dentry_operations adfs_dentry_operations;
170extern struct adfs_dir_ops adfs_f_dir_ops;
171extern struct adfs_dir_ops adfs_fplus_dir_ops;
172
173extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
174 int wait);
175
176/* file.c */
177extern const struct inode_operations adfs_file_inode_operations;
178extern const struct file_operations adfs_file_operations;
179
180static inline __u32 signed_asl(__u32 val, signed int shift)
181{
182 if (shift >= 0)
183 val <<= shift;
184 else
185 val >>= -shift;
186 return val;
187}
188
189/*
190 * Calculate the address of a block in an object given the block offset
191 * and the object identity.
192 *
193 * The root directory ID should always be looked up in the map [3.4]
194 */
195static inline int
196__adfs_block_map(struct super_block *sb, unsigned int object_id,
197 unsigned int block)
198{
199 if (object_id & 255) {
200 unsigned int off;
201
202 off = (object_id & 255) - 1;
203 block += off << ADFS_SB(sb)->s_log2sharesize;
204 }
205
206 return adfs_map_lookup(sb, object_id >> 8, block);
207}