2 #include <linux/adfs_fs.h>
4 /* Internal data structures for ADFS */
6 #define ADFS_FREE_FRAG 0
7 #define ADFS_BAD_FRAG 1
8 #define ADFS_ROOT_FRAG 2
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)
23 * adfs file system inode data in memory
25 struct adfs_inode_info
{
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
;
37 * Forward-declare this
43 * ADFS file system superblock data in memory
46 struct adfs_discmap
*s_map
; /* bh list containing map */
47 struct adfs_dir_ops
*s_dir
; /* directory operations */
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 */
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 */
64 static inline struct adfs_sb_info
*ADFS_SB(struct super_block
*sb
)
69 static inline struct adfs_inode_info
*ADFS_I(struct inode
*inode
)
71 return container_of(inode
, struct adfs_inode_info
, vfs_inode
);
78 struct super_block
*sb
;
81 struct buffer_head
*bh
[4];
83 /* big directories need allocated buffers */
84 struct buffer_head
**bh_fplus
;
87 unsigned int parent_id
;
89 struct adfs_dirheader dirhead
;
90 union adfs_dirtail dirtail
;
94 * This is the overall maximum name length
96 #define ADFS_MAX_NAME_LEN 256
98 __u32 parent_id
; /* parent object id */
99 __u32 file_id
; /* object id */
100 __u32 loadaddr
; /* load address */
101 __u32 execaddr
; /* execution address */
102 __u32 size
; /* size */
103 __u8 attr
; /* RISC OS attributes */
104 unsigned char name_len
; /* name length */
105 char name
[ADFS_MAX_NAME_LEN
];/* file name */
108 struct adfs_dir_ops
{
109 int (*read
)(struct super_block
*sb
, unsigned int id
, unsigned int sz
, struct adfs_dir
*dir
);
110 int (*setpos
)(struct adfs_dir
*dir
, unsigned int fpos
);
111 int (*getnext
)(struct adfs_dir
*dir
, struct object_info
*obj
);
112 int (*update
)(struct adfs_dir
*dir
, struct object_info
*obj
);
113 int (*create
)(struct adfs_dir
*dir
, struct object_info
*obj
);
114 int (*remove
)(struct adfs_dir
*dir
, struct object_info
*obj
);
115 int (*sync
)(struct adfs_dir
*dir
);
116 void (*free
)(struct adfs_dir
*dir
);
119 struct adfs_discmap
{
120 struct buffer_head
*dm_bh
;
122 unsigned int dm_startbit
;
123 unsigned int dm_endbit
;
127 struct inode
*adfs_iget(struct super_block
*sb
, struct object_info
*obj
);
128 int adfs_write_inode(struct inode
*inode
, struct writeback_control
*wbc
);
129 int adfs_notify_change(struct dentry
*dentry
, struct iattr
*attr
);
132 extern int adfs_map_lookup(struct super_block
*sb
, unsigned int frag_id
, unsigned int offset
);
133 extern unsigned int adfs_map_free(struct super_block
*sb
);
136 void __adfs_error(struct super_block
*sb
, const char *function
,
137 const char *fmt
, ...);
138 #define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt)
143 * Inodes and file operations
147 extern const struct inode_operations adfs_dir_inode_operations
;
148 extern const struct file_operations adfs_dir_operations
;
149 extern const struct dentry_operations adfs_dentry_operations
;
150 extern struct adfs_dir_ops adfs_f_dir_ops
;
151 extern struct adfs_dir_ops adfs_fplus_dir_ops
;
153 extern int adfs_dir_update(struct super_block
*sb
, struct object_info
*obj
,
157 extern const struct inode_operations adfs_file_inode_operations
;
158 extern const struct file_operations adfs_file_operations
;
160 static inline __u32
signed_asl(__u32 val
, signed int shift
)
170 * Calculate the address of a block in an object given the block offset
171 * and the object identity.
173 * The root directory ID should always be looked up in the map [3.4]
176 __adfs_block_map(struct super_block
*sb
, unsigned int object_id
,
179 if (object_id
& 255) {
182 off
= (object_id
& 255) - 1;
183 block
+= off
<< ADFS_SB(sb
)->s_log2sharesize
;
186 return adfs_map_lookup(sb
, object_id
>> 8, block
);