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_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
11 extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
12 extern void sysfs_hash_and_remove(struct dentry * dir, const char * name);
14 extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
15 extern void sysfs_remove_subdir(struct dentry *);
17 extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
18 extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
19 extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
21 extern struct rw_semaphore sysfs_rename_sem;
22 extern struct super_block * sysfs_sb;
23 extern struct file_operations sysfs_dir_operations;
24 extern struct file_operations sysfs_file_operations;
25 extern struct file_operations bin_fops;
26 extern struct inode_operations sysfs_dir_inode_operations;
27 extern struct inode_operations sysfs_symlink_inode_operations;
29 struct sysfs_symlink {
31 struct kobject * target_kobj;
34 static inline struct kobject * to_kobj(struct dentry * dentry)
36 struct sysfs_dirent * sd = dentry->d_fsdata;
37 return ((struct kobject *) sd->s_element);
40 static inline struct attribute * to_attr(struct dentry * dentry)
42 struct sysfs_dirent * sd = dentry->d_fsdata;
43 return ((struct attribute *) sd->s_element);
46 static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
48 struct sysfs_dirent * sd = dentry->d_fsdata;
49 return ((struct bin_attribute *) sd->s_element);
52 static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
54 struct kobject * kobj = NULL;
56 spin_lock(&dcache_lock);
57 if (!d_unhashed(dentry)) {
58 struct sysfs_dirent * sd = dentry->d_fsdata;
59 if (sd->s_type & SYSFS_KOBJ_LINK) {
60 struct sysfs_symlink * sl = sd->s_element;
61 kobj = kobject_get(sl->target_kobj);
63 kobj = kobject_get(sd->s_element);
65 spin_unlock(&dcache_lock);
70 static inline void release_sysfs_dirent(struct sysfs_dirent * sd)
72 if (sd->s_type & SYSFS_KOBJ_LINK) {
73 struct sysfs_symlink * sl = sd->s_element;
75 kobject_put(sl->target_kobj);
79 kmem_cache_free(sysfs_dir_cachep, sd);
82 static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
85 WARN_ON(!atomic_read(&sd->s_count));
86 atomic_inc(&sd->s_count);
91 static inline void sysfs_put(struct sysfs_dirent * sd)
93 if (atomic_dec_and_test(&sd->s_count))
94 release_sysfs_dirent(sd);