2 extern struct vfsmount
* sysfs_mount
;
3 extern kmem_cache_t
*sysfs_dir_cachep
;
5 extern struct inode
* sysfs_new_inode(mode_t mode
, struct sysfs_dirent
*);
6 extern int sysfs_create(struct dentry
*, int mode
, int (*init
)(struct inode
*));
8 extern int sysfs_dirent_exist(struct sysfs_dirent
*, const unsigned char *);
9 extern int sysfs_make_dirent(struct sysfs_dirent
*, struct dentry
*, void *,
12 extern int sysfs_add_file(struct dentry
*, const struct attribute
*, int);
13 extern void sysfs_hash_and_remove(struct dentry
* dir
, const char * name
);
15 extern int sysfs_create_subdir(struct kobject
*, const char *, struct dentry
**);
16 extern void sysfs_remove_subdir(struct dentry
*);
18 extern const unsigned char * sysfs_get_name(struct sysfs_dirent
*sd
);
19 extern void sysfs_drop_dentry(struct sysfs_dirent
*sd
, struct dentry
*parent
);
20 extern int sysfs_setattr(struct dentry
*dentry
, struct iattr
*iattr
);
22 extern struct rw_semaphore sysfs_rename_sem
;
23 extern struct super_block
* sysfs_sb
;
24 extern const struct file_operations sysfs_dir_operations
;
25 extern const struct file_operations sysfs_file_operations
;
26 extern const struct file_operations bin_fops
;
27 extern struct inode_operations sysfs_dir_inode_operations
;
28 extern struct inode_operations sysfs_symlink_inode_operations
;
30 struct sysfs_symlink
{
32 struct kobject
* target_kobj
;
35 static inline struct kobject
* to_kobj(struct dentry
* dentry
)
37 struct sysfs_dirent
* sd
= dentry
->d_fsdata
;
38 return ((struct kobject
*) sd
->s_element
);
41 static inline struct attribute
* to_attr(struct dentry
* dentry
)
43 struct sysfs_dirent
* sd
= dentry
->d_fsdata
;
44 return ((struct attribute
*) sd
->s_element
);
47 static inline struct bin_attribute
* to_bin_attr(struct dentry
* dentry
)
49 struct sysfs_dirent
* sd
= dentry
->d_fsdata
;
50 return ((struct bin_attribute
*) sd
->s_element
);
53 static inline struct kobject
*sysfs_get_kobject(struct dentry
*dentry
)
55 struct kobject
* kobj
= NULL
;
57 spin_lock(&dcache_lock
);
58 if (!d_unhashed(dentry
)) {
59 struct sysfs_dirent
* sd
= dentry
->d_fsdata
;
60 if (sd
->s_type
& SYSFS_KOBJ_LINK
) {
61 struct sysfs_symlink
* sl
= sd
->s_element
;
62 kobj
= kobject_get(sl
->target_kobj
);
64 kobj
= kobject_get(sd
->s_element
);
66 spin_unlock(&dcache_lock
);
71 static inline void release_sysfs_dirent(struct sysfs_dirent
* sd
)
73 if (sd
->s_type
& SYSFS_KOBJ_LINK
) {
74 struct sysfs_symlink
* sl
= sd
->s_element
;
76 kobject_put(sl
->target_kobj
);
80 kmem_cache_free(sysfs_dir_cachep
, sd
);
83 static inline struct sysfs_dirent
* sysfs_get(struct sysfs_dirent
* sd
)
86 WARN_ON(!atomic_read(&sd
->s_count
));
87 atomic_inc(&sd
->s_count
);
92 static inline void sysfs_put(struct sysfs_dirent
* sd
)
94 if (atomic_dec_and_test(&sd
->s_count
))
95 release_sysfs_dirent(sd
);