3 struct list_head s_sibling;
4 struct list_head s_children;
8 struct dentry * s_dentry;
9 struct iattr * s_iattr;
13 extern struct vfsmount * sysfs_mount;
14 extern struct kmem_cache *sysfs_dir_cachep;
16 extern void sysfs_delete_inode(struct inode *inode);
17 extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *);
18 extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
20 extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
21 extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
24 extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
25 extern int sysfs_hash_and_remove(struct dentry * dir, const char * name);
26 extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
28 extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
29 extern void sysfs_remove_subdir(struct dentry *);
31 extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
32 extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
33 extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
35 extern struct rw_semaphore sysfs_rename_sem;
36 extern struct super_block * sysfs_sb;
37 extern const struct file_operations sysfs_dir_operations;
38 extern const struct file_operations sysfs_file_operations;
39 extern const struct file_operations bin_fops;
40 extern const struct inode_operations sysfs_dir_inode_operations;
41 extern const struct inode_operations sysfs_symlink_inode_operations;
43 struct sysfs_symlink {
45 struct kobject * target_kobj;
49 struct list_head associates;
53 struct sysfs_ops * ops;
60 struct sysfs_buffer_collection {
61 struct list_head associates;
64 static inline struct kobject * to_kobj(struct dentry * dentry)
66 struct sysfs_dirent * sd = dentry->d_fsdata;
67 return ((struct kobject *) sd->s_element);
70 static inline struct attribute * to_attr(struct dentry * dentry)
72 struct sysfs_dirent * sd = dentry->d_fsdata;
73 return ((struct attribute *) sd->s_element);
76 static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
78 struct sysfs_dirent * sd = dentry->d_fsdata;
79 return ((struct bin_attribute *) sd->s_element);
82 static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
84 struct kobject * kobj = NULL;
86 spin_lock(&dcache_lock);
87 if (!d_unhashed(dentry)) {
88 struct sysfs_dirent * sd = dentry->d_fsdata;
89 if (sd->s_type & SYSFS_KOBJ_LINK) {
90 struct sysfs_symlink * sl = sd->s_element;
91 kobj = kobject_get(sl->target_kobj);
93 kobj = kobject_get(sd->s_element);
95 spin_unlock(&dcache_lock);
100 static inline void release_sysfs_dirent(struct sysfs_dirent * sd)
102 if (sd->s_type & SYSFS_KOBJ_LINK) {
103 struct sysfs_symlink * sl = sd->s_element;
104 kfree(sl->link_name);
105 kobject_put(sl->target_kobj);
109 kmem_cache_free(sysfs_dir_cachep, sd);
112 static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
115 WARN_ON(!atomic_read(&sd->s_count));
116 atomic_inc(&sd->s_count);
121 static inline void sysfs_put(struct sysfs_dirent * sd)
123 if (atomic_dec_and_test(&sd->s_count))
124 release_sysfs_dirent(sd);
127 static inline int sysfs_is_shadowed_inode(struct inode *inode)
129 return S_ISDIR(inode->i_mode) && inode->i_op->follow_link;