2 extern struct vfsmount
* sysfs_mount
;
3 extern struct kmem_cache
*sysfs_dir_cachep
;
5 extern void sysfs_delete_inode(struct inode
*inode
);
6 extern struct inode
* sysfs_new_inode(mode_t mode
, struct sysfs_dirent
*);
7 extern int sysfs_create(struct dentry
*, int mode
, int (*init
)(struct inode
*));
9 extern int sysfs_dirent_exist(struct sysfs_dirent
*, const unsigned char *);
10 extern int sysfs_make_dirent(struct sysfs_dirent
*, struct dentry
*, void *,
13 extern int sysfs_add_file(struct dentry
*, const struct attribute
*, int);
14 extern int sysfs_hash_and_remove(struct dentry
* dir
, const char * name
);
15 extern struct sysfs_dirent
*sysfs_find(struct sysfs_dirent
*dir
, const char * name
);
17 extern int sysfs_create_subdir(struct kobject
*, const char *, struct dentry
**);
18 extern void sysfs_remove_subdir(struct dentry
*);
20 extern const unsigned char * sysfs_get_name(struct sysfs_dirent
*sd
);
21 extern void sysfs_drop_dentry(struct sysfs_dirent
*sd
, struct dentry
*parent
);
22 extern int sysfs_setattr(struct dentry
*dentry
, struct iattr
*iattr
);
24 extern struct rw_semaphore sysfs_rename_sem
;
25 extern struct super_block
* sysfs_sb
;
26 extern const struct file_operations sysfs_dir_operations
;
27 extern const struct file_operations sysfs_file_operations
;
28 extern const struct file_operations bin_fops
;
29 extern const struct inode_operations sysfs_dir_inode_operations
;
30 extern const struct inode_operations sysfs_symlink_inode_operations
;
32 struct sysfs_symlink
{
34 struct kobject
* target_kobj
;
38 struct list_head associates
;
42 struct sysfs_ops
* ops
;
49 struct sysfs_buffer_collection
{
50 struct list_head associates
;
53 static inline struct kobject
* to_kobj(struct dentry
* dentry
)
55 struct sysfs_dirent
* sd
= dentry
->d_fsdata
;
56 return ((struct kobject
*) sd
->s_element
);
59 static inline struct attribute
* to_attr(struct dentry
* dentry
)
61 struct sysfs_dirent
* sd
= dentry
->d_fsdata
;
62 return ((struct attribute
*) sd
->s_element
);
65 static inline struct bin_attribute
* to_bin_attr(struct dentry
* dentry
)
67 struct sysfs_dirent
* sd
= dentry
->d_fsdata
;
68 return ((struct bin_attribute
*) sd
->s_element
);
71 static inline struct kobject
*sysfs_get_kobject(struct dentry
*dentry
)
73 struct kobject
* kobj
= NULL
;
75 spin_lock(&dcache_lock
);
76 if (!d_unhashed(dentry
)) {
77 struct sysfs_dirent
* sd
= dentry
->d_fsdata
;
78 if (sd
->s_type
& SYSFS_KOBJ_LINK
) {
79 struct sysfs_symlink
* sl
= sd
->s_element
;
80 kobj
= kobject_get(sl
->target_kobj
);
82 kobj
= kobject_get(sd
->s_element
);
84 spin_unlock(&dcache_lock
);
89 static inline void release_sysfs_dirent(struct sysfs_dirent
* sd
)
91 if (sd
->s_type
& SYSFS_KOBJ_LINK
) {
92 struct sysfs_symlink
* sl
= sd
->s_element
;
94 kobject_put(sl
->target_kobj
);
98 kmem_cache_free(sysfs_dir_cachep
, sd
);
101 static inline struct sysfs_dirent
* sysfs_get(struct sysfs_dirent
* sd
)
104 WARN_ON(!atomic_read(&sd
->s_count
));
105 atomic_inc(&sd
->s_count
);
110 static inline void sysfs_put(struct sysfs_dirent
* sd
)
112 if (atomic_dec_and_test(&sd
->s_count
))
113 release_sysfs_dirent(sd
);
116 static inline int sysfs_is_shadowed_inode(struct inode
*inode
)
118 return S_ISDIR(inode
->i_mode
) && inode
->i_op
->follow_link
;