perf_events: Fix read() bogus counts when in error state
[linux-2.6.git] / fs / adfs / adfs.h
blob9cc18775b832e15eea86ca9b3df7f0304dfde274
1 #include <linux/fs.h>
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)
18 #include "dir_f.h"
20 struct buffer_head;
23 * adfs file system inode data in memory
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;
37 * Forward-declare this
39 struct adfs_discmap;
40 struct adfs_dir_ops;
43 * ADFS file system superblock data in memory
45 struct adfs_sb_info {
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)
66 return sb->s_fs_info;
69 static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
71 return container_of(inode, struct adfs_inode_info, vfs_inode);
75 * Directory handling
77 struct adfs_dir {
78 struct super_block *sb;
80 int nr_buffers;
81 struct buffer_head *bh[4];
82 unsigned int pos;
83 unsigned int parent_id;
85 struct adfs_dirheader dirhead;
86 union adfs_dirtail dirtail;
90 * This is the overall maximum name length
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 */
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);
115 struct adfs_discmap {
116 struct buffer_head *dm_bh;
117 __u32 dm_startblk;
118 unsigned int dm_startbit;
119 unsigned int dm_endbit;
122 /* Inode stuff */
123 struct inode *adfs_iget(struct super_block *sb, struct object_info *obj);
124 int adfs_write_inode(struct inode *inode,int unused);
125 int adfs_notify_change(struct dentry *dentry, struct iattr *attr);
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);
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)
136 /* super.c */
139 * Inodes and file operations
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;
149 extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
150 int wait);
152 /* file.c */
153 extern const struct inode_operations adfs_file_inode_operations;
154 extern const struct file_operations adfs_file_operations;
156 static inline __u32 signed_asl(__u32 val, signed int shift)
158 if (shift >= 0)
159 val <<= shift;
160 else
161 val >>= -shift;
162 return val;
166 * Calculate the address of a block in an object given the block offset
167 * and the object identity.
169 * The root directory ID should always be looked up in the map [3.4]
171 static inline int
172 __adfs_block_map(struct super_block *sb, unsigned int object_id,
173 unsigned int block)
175 if (object_id & 255) {
176 unsigned int off;
178 off = (object_id & 255) - 1;
179 block += off << ADFS_SB(sb)->s_log2sharesize;
182 return adfs_map_lookup(sb, object_id >> 8, block);