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- /*
- * sysfs.h - definitions for the device driver filesystem
- *
- * Copyright (c) 2001,2002 Patrick Mochel
- * Copyright (c) 2004 Silicon Graphics, Inc.
- * Copyright (c) 2007 SUSE Linux Products GmbH
- * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
- *
- * 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;
-
- /* FIXME
- * The *owner field is no longer used.
- * x86 tree has been cleaned up. The owner
- * attribute is still left for other arches.
- */
- struct attribute {
- const char *name;
- struct module *owner;
- mode_t mode;
- };
-
- struct attribute_group {
- const char *name;
- mode_t (*is_visible)(struct kobject *,
- struct attribute *, int);
- 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 }, \
- .show = _show, \
- .store = _store, \
- }
-
- #define __ATTR_RO(_name) { \
- .attr = { .name = __stringify(_name), .mode = 0444 }, \
- .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 *, struct bin_attribute *,
- char *, loff_t, size_t);
- ssize_t (*write)(struct kobject *, struct bin_attribute *,
- 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);
- };
-
- struct sysfs_dirent;
-
- #ifdef CONFIG_SYSFS
-
- int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
- void *data, struct module *owner);
-
- int __must_check sysfs_create_dir(struct kobject *kobj);
- void sysfs_remove_dir(struct kobject *kobj);
- int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name);
- int __must_check sysfs_move_dir(struct kobject *kobj,
- struct kobject *new_parent_kobj);
-
- int __must_check sysfs_create_file(struct kobject *kobj,
- const struct attribute *attr);
- int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr,
- mode_t mode);
- void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
-
- 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_link(struct kobject *kobj, struct kobject *target,
- const char *name);
- int __must_check sysfs_create_link_nowarn(struct kobject *kobj,
- struct kobject *target,
- const char *name);
- void sysfs_remove_link(struct kobject *kobj, const char *name);
-
- int __must_check sysfs_create_group(struct kobject *kobj,
- const struct attribute_group *grp);
- int sysfs_update_group(struct kobject *kobj,
- const struct attribute_group *grp);
- void sysfs_remove_group(struct kobject *kobj,
- const struct attribute_group *grp);
- 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 *kobj, const char *dir, const char *attr);
- void sysfs_notify_dirent(struct sysfs_dirent *sd);
- struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
- const unsigned char *name);
- struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd);
- void sysfs_put(struct sysfs_dirent *sd);
- void sysfs_printk_last_file(void);
- 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 *kobj)
- {
- return 0;
- }
-
- static inline void sysfs_remove_dir(struct kobject *kobj)
- {
- }
-
- static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
- {
- return 0;
- }
-
- static inline int sysfs_move_dir(struct kobject *kobj,
- struct kobject *new_parent_kobj)
- {
- return 0;
- }
-
- static inline int sysfs_create_file(struct kobject *kobj,
- const struct attribute *attr)
- {
- 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 *kobj,
- const struct attribute *attr)
- {
- }
-
- static inline int sysfs_create_bin_file(struct kobject *kobj,
- struct bin_attribute *attr)
- {
- return 0;
- }
-
- static inline void sysfs_remove_bin_file(struct kobject *kobj,
- struct bin_attribute *attr)
- {
- }
-
- static inline int sysfs_create_link(struct kobject *kobj,
- struct kobject *target, const char *name)
- {
- return 0;
- }
-
- static inline int sysfs_create_link_nowarn(struct kobject *kobj,
- struct kobject *target,
- const char *name)
- {
- return 0;
- }
-
- static inline void sysfs_remove_link(struct kobject *kobj, const char *name)
- {
- }
-
- static inline int sysfs_create_group(struct kobject *kobj,
- const struct attribute_group *grp)
- {
- return 0;
- }
-
- static inline int sysfs_update_group(struct kobject *kobj,
- const struct attribute_group *grp)
- {
- return 0;
- }
-
- static inline void sysfs_remove_group(struct kobject *kobj,
- const struct attribute_group *grp)
- {
- }
-
- 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 *kobj, const char *dir,
- const char *attr)
- {
- }
- static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
- {
- }
- static inline
- struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
- const unsigned char *name)
- {
- return NULL;
- }
- static inline struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd)
- {
- return NULL;
- }
- static inline void sysfs_put(struct sysfs_dirent *sd)
- {
- }
-
- static inline int __must_check sysfs_init(void)
- {
- return 0;
- }
-
- static inline void sysfs_printk_last_file(void)
- {
- }
-
- #endif /* CONFIG_SYSFS */
-
- #endif /* _SYSFS_H_ */
-