| struct sysfs_elem_dir { |
| struct kobject * kobj; |
| }; |
| |
| struct sysfs_elem_symlink { |
| struct sysfs_dirent * target_sd; |
| }; |
| |
| struct sysfs_elem_attr { |
| struct attribute * attr; |
| }; |
| |
| struct sysfs_elem_bin_attr { |
| struct bin_attribute * bin_attr; |
| }; |
| |
| /* |
| * As long as s_count reference is held, the sysfs_dirent itself is |
| * accessible. Dereferencing s_elem or any other outer entity |
| * requires s_active reference. |
| */ |
| struct sysfs_dirent { |
| atomic_t s_count; |
| atomic_t s_active; |
| struct sysfs_dirent * s_parent; |
| struct sysfs_dirent * s_sibling; |
| struct sysfs_dirent * s_children; |
| const char * s_name; |
| |
| union { |
| struct sysfs_elem_dir dir; |
| struct sysfs_elem_symlink symlink; |
| struct sysfs_elem_attr attr; |
| struct sysfs_elem_bin_attr bin_attr; |
| } s_elem; |
| |
| unsigned int s_flags; |
| umode_t s_mode; |
| ino_t s_ino; |
| struct dentry * s_dentry; |
| struct iattr * s_iattr; |
| atomic_t s_event; |
| }; |
| |
| #define SD_DEACTIVATED_BIAS INT_MIN |
| |
| struct sysfs_addrm_cxt { |
| struct sysfs_dirent *parent_sd; |
| struct inode *parent_inode; |
| struct sysfs_dirent *removed; |
| int cnt; |
| }; |
| |
| extern struct vfsmount * sysfs_mount; |
| extern struct kmem_cache *sysfs_dir_cachep; |
| |
| extern void sysfs_link_sibling(struct sysfs_dirent *sd); |
| extern void sysfs_unlink_sibling(struct sysfs_dirent *sd); |
| extern struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd); |
| extern void sysfs_put_active(struct sysfs_dirent *sd); |
| extern struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd); |
| extern void sysfs_put_active_two(struct sysfs_dirent *sd); |
| extern void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt, |
| struct sysfs_dirent *parent_sd); |
| extern void sysfs_add_one(struct sysfs_addrm_cxt *acxt, |
| struct sysfs_dirent *sd); |
| extern void sysfs_remove_one(struct sysfs_addrm_cxt *acxt, |
| struct sysfs_dirent *sd); |
| extern int sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt); |
| |
| extern void sysfs_delete_inode(struct inode *inode); |
| extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode); |
| extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd); |
| extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode); |
| |
| extern void release_sysfs_dirent(struct sysfs_dirent * sd); |
| extern struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd, |
| const unsigned char *name); |
| extern struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd, |
| const unsigned char *name); |
| extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, |
| int type); |
| |
| extern int sysfs_add_file(struct sysfs_dirent *dir_sd, |
| const struct attribute *attr, int type); |
| extern int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name); |
| extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name); |
| |
| extern int sysfs_create_subdir(struct kobject *kobj, const char *name, |
| struct sysfs_dirent **p_sd); |
| extern void sysfs_remove_subdir(struct sysfs_dirent *sd); |
| |
| extern void sysfs_drop_dentry(struct sysfs_dirent *sd); |
| extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); |
| |
| extern spinlock_t sysfs_assoc_lock; |
| extern struct mutex sysfs_mutex; |
| extern struct super_block * sysfs_sb; |
| extern const struct file_operations sysfs_dir_operations; |
| extern const struct file_operations sysfs_file_operations; |
| extern const struct file_operations bin_fops; |
| extern const struct inode_operations sysfs_dir_inode_operations; |
| extern const struct inode_operations sysfs_symlink_inode_operations; |
| |
| static inline unsigned int sysfs_type(struct sysfs_dirent *sd) |
| { |
| return sd->s_flags & SYSFS_TYPE_MASK; |
| } |
| |
| static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) |
| { |
| if (sd) { |
| WARN_ON(!atomic_read(&sd->s_count)); |
| atomic_inc(&sd->s_count); |
| } |
| return sd; |
| } |
| |
| static inline void sysfs_put(struct sysfs_dirent * sd) |
| { |
| if (sd && atomic_dec_and_test(&sd->s_count)) |
| release_sysfs_dirent(sd); |
| } |
| |
| static inline int sysfs_is_shadowed_inode(struct inode *inode) |
| { |
| return S_ISDIR(inode->i_mode) && inode->i_op->follow_link; |
| } |