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