2 extern struct vfsmount * sysfs_mount;
3 extern struct kmem_cache *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 int sysfs_hash_and_remove(struct dentry * dir, const char * name);
14 extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
16 extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
17 extern void sysfs_remove_subdir(struct dentry *);
19 extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
20 extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
21 extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
23 extern struct rw_semaphore sysfs_rename_sem;
24 extern struct super_block * sysfs_sb;
25 extern const struct file_operations sysfs_dir_operations;
26 extern const struct file_operations sysfs_file_operations;
27 extern const struct file_operations bin_fops;
28 extern struct inode_operations sysfs_dir_inode_operations;
29 extern struct inode_operations sysfs_symlink_inode_operations;
31 struct sysfs_symlink {
33 struct kobject * target_kobj;
37 struct list_head associates;
41 struct sysfs_ops * ops;
48 struct sysfs_buffer_collection {
49 struct list_head associates;
52 static inline struct kobject * to_kobj(struct dentry * dentry)
54 struct sysfs_dirent * sd = dentry->d_fsdata;
55 return ((struct kobject *) sd->s_element);
58 static inline struct attribute * to_attr(struct dentry * dentry)
60 struct sysfs_dirent * sd = dentry->d_fsdata;
61 return ((struct attribute *) sd->s_element);
64 static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
66 struct sysfs_dirent * sd = dentry->d_fsdata;
67 return ((struct bin_attribute *) sd->s_element);
70 static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
72 struct kobject * kobj = NULL;
74 spin_lock(&dcache_lock);
75 if (!d_unhashed(dentry)) {
76 struct sysfs_dirent * sd = dentry->d_fsdata;
77 if (sd->s_type & SYSFS_KOBJ_LINK) {
78 struct sysfs_symlink * sl = sd->s_element;
79 kobj = kobject_get(sl->target_kobj);
81 kobj = kobject_get(sd->s_element);
83 spin_unlock(&dcache_lock);
88 static inline void release_sysfs_dirent(struct sysfs_dirent * sd)
90 if (sd->s_type & SYSFS_KOBJ_LINK) {
91 struct sysfs_symlink * sl = sd->s_element;
93 kobject_put(sl->target_kobj);
97 kmem_cache_free(sysfs_dir_cachep, sd);
100 static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
103 WARN_ON(!atomic_read(&sd->s_count));
104 atomic_inc(&sd->s_count);
109 static inline void sysfs_put(struct sysfs_dirent * sd)
111 if (atomic_dec_and_test(&sd->s_count))
112 release_sysfs_dirent(sd);