/* * sysfs.h - definitions for the device driver filesystem * * Copyright (c) 2001,2002 Patrick Mochel * Copyright (c) 2004 Silicon Graphics, Inc. * * Please see Documentation/filesystems/sysfs.txt for more information. */ #ifndef _SYSFS_H_ #define _SYSFS_H_ #include <linux/compiler.h> #include <linux/errno.h> #include <linux/list.h> #include <asm/atomic.h> struct kobject; struct module; struct nameidata; struct dentry; struct attribute { const char * name; struct module * owner; mode_t mode; }; struct attribute_group { const char * name; struct attribute ** attrs; }; /** * Use these macros to make defining attributes easier. See include/linux/device.h * for examples.. */ #define __ATTR(_name,_mode,_show,_store) { \ .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \ .show = _show, \ .store = _store, \ } #define __ATTR_RO(_name) { \ .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \ .show = _name##_show, \ } #define __ATTR_NULL { .attr = { .name = NULL } } #define attr_name(_attr) (_attr).attr.name struct vm_area_struct; struct bin_attribute { struct attribute attr; size_t size; void *private; ssize_t (*read)(struct kobject *, char *, loff_t, size_t); ssize_t (*write)(struct kobject *, char *, loff_t, size_t); int (*mmap)(struct kobject *, struct bin_attribute *attr, struct vm_area_struct *vma); }; struct sysfs_ops { ssize_t (*show)(struct kobject *, struct attribute *,char *); ssize_t (*store)(struct kobject *,struct attribute *,const char *, size_t); }; #define SYSFS_ROOT 0x0001 #define SYSFS_DIR 0x0002 #define SYSFS_KOBJ_ATTR 0x0004 #define SYSFS_KOBJ_BIN_ATTR 0x0008 #define SYSFS_KOBJ_LINK 0x0020 #define SYSFS_NOT_PINNED (SYSFS_KOBJ_ATTR | SYSFS_KOBJ_BIN_ATTR | SYSFS_KOBJ_LINK) #ifdef CONFIG_SYSFS extern int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *), void *data, struct module *owner); extern int __must_check sysfs_create_dir(struct kobject *, struct dentry *); extern void sysfs_remove_dir(struct kobject *); extern int __must_check sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name); extern int __must_check sysfs_move_dir(struct kobject *, struct kobject *); extern int __must_check sysfs_create_file(struct kobject *, const struct attribute *); extern int __must_check sysfs_update_file(struct kobject *, const struct attribute *); extern int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode); extern void sysfs_remove_file(struct kobject *, const struct attribute *); extern int __must_check sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name); extern void sysfs_remove_link(struct kobject *, const char * name); int __must_check sysfs_create_bin_file(struct kobject *kobj, struct bin_attribute *attr); void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr); int __must_check sysfs_create_group(struct kobject *, const struct attribute_group *); void sysfs_remove_group(struct kobject *, const struct attribute_group *); int sysfs_add_file_to_group(struct kobject *kobj, const struct attribute *attr, const char *group); void sysfs_remove_file_from_group(struct kobject *kobj, const struct attribute *attr, const char *group); void sysfs_notify(struct kobject * k, char *dir, char *attr); extern int sysfs_make_shadowed_dir(struct kobject *kobj, void * (*follow_link)(struct dentry *, struct nameidata *)); extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj); extern void sysfs_remove_shadow_dir(struct dentry *dir); extern int __must_check sysfs_init(void); #else /* CONFIG_SYSFS */ static inline int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *), void *data, struct module *owner) { return -ENOSYS; } static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow) { return 0; } static inline void sysfs_remove_dir(struct kobject * k) { ; } static inline int sysfs_rename_dir(struct kobject * k, struct dentry *new_parent, const char *new_name) { return 0; } static inline int sysfs_move_dir(struct kobject * k, struct kobject * new_parent) { return 0; } static inline int sysfs_create_file(struct kobject * k, const struct attribute * a) { return 0; } static inline int sysfs_update_file(struct kobject * k, const struct attribute * a) { return 0; } static inline int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode) { return 0; } static inline void sysfs_remove_file(struct kobject * k, const struct attribute * a) { ; } static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n) { return 0; } static inline void sysfs_remove_link(struct kobject * k, const char * name) { ; } static inline int sysfs_create_bin_file(struct kobject * k, struct bin_attribute * a) { return 0; } static inline int sysfs_remove_bin_file(struct kobject * k, struct bin_attribute * a) { return 0; } static inline int sysfs_create_group(struct kobject * k, const struct attribute_group *g) { return 0; } static inline void sysfs_remove_group(struct kobject * k, const struct attribute_group * g) { ; } static inline int sysfs_add_file_to_group(struct kobject *kobj, const struct attribute *attr, const char *group) { return 0; } static inline void sysfs_remove_file_from_group(struct kobject *kobj, const struct attribute *attr, const char *group) { } static inline void sysfs_notify(struct kobject * k, char *dir, char *attr) { } static inline int sysfs_make_shadowed_dir(struct kobject *kobj, void * (*follow_link)(struct dentry *, struct nameidata *)) { return 0; } static inline int __must_check sysfs_init(void) { return 0; } #endif /* CONFIG_SYSFS */ #endif /* _SYSFS_H_ */