1 struct sysfs_elem_dir {
5 struct sysfs_elem_symlink {
6 struct sysfs_dirent * target_sd;
9 struct sysfs_elem_attr {
10 struct attribute * attr;
13 struct sysfs_elem_bin_attr {
14 struct bin_attribute * bin_attr;
18 * As long as s_count reference is held, the sysfs_dirent itself is
19 * accessible. Dereferencing s_elem or any other outer entity
20 * requires s_active reference.
25 struct sysfs_dirent * s_parent;
26 struct sysfs_dirent * s_sibling;
27 struct sysfs_dirent * s_children;
31 struct sysfs_elem_dir dir;
32 struct sysfs_elem_symlink symlink;
33 struct sysfs_elem_attr attr;
34 struct sysfs_elem_bin_attr bin_attr;
40 struct dentry * s_dentry;
41 struct iattr * s_iattr;
45 #define SD_DEACTIVATED_BIAS INT_MIN
47 extern struct vfsmount * sysfs_mount;
48 extern struct kmem_cache *sysfs_dir_cachep;
50 extern struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
51 extern void sysfs_put_active(struct sysfs_dirent *sd);
52 extern struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd);
53 extern void sysfs_put_active_two(struct sysfs_dirent *sd);
54 extern void sysfs_deactivate(struct sysfs_dirent *sd);
56 extern void sysfs_delete_inode(struct inode *inode);
57 extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode);
58 extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd);
59 extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode);
61 extern void release_sysfs_dirent(struct sysfs_dirent * sd);
62 extern struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,
63 const unsigned char *name);
64 extern struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
65 const unsigned char *name);
66 extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode,
68 extern void sysfs_attach_dirent(struct sysfs_dirent *sd,
69 struct sysfs_dirent *parent_sd,
70 struct dentry *dentry);
72 extern int sysfs_add_file(struct sysfs_dirent *dir_sd,
73 const struct attribute *attr, int type);
74 extern int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name);
75 extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
77 extern int sysfs_create_subdir(struct kobject *kobj, const char *name,
78 struct sysfs_dirent **p_sd);
79 extern void sysfs_remove_subdir(struct sysfs_dirent *sd);
81 extern void sysfs_drop_dentry(struct sysfs_dirent *sd);
82 extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
84 extern spinlock_t sysfs_assoc_lock;
85 extern struct mutex sysfs_mutex;
86 extern struct super_block * sysfs_sb;
87 extern const struct file_operations sysfs_dir_operations;
88 extern const struct file_operations sysfs_file_operations;
89 extern const struct file_operations bin_fops;
90 extern const struct inode_operations sysfs_dir_inode_operations;
91 extern const struct inode_operations sysfs_symlink_inode_operations;
93 static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
95 return sd->s_flags & SYSFS_TYPE_MASK;
98 static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
101 WARN_ON(!atomic_read(&sd->s_count));
102 atomic_inc(&sd->s_count);
107 static inline void sysfs_put(struct sysfs_dirent * sd)
109 if (sd && atomic_dec_and_test(&sd->s_count))
110 release_sysfs_dirent(sd);
113 static inline int sysfs_is_shadowed_inode(struct inode *inode)
115 return S_ISDIR(inode->i_mode) && inode->i_op->follow_link;