346 lines
8.8 KiB
C
346 lines
8.8 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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* Copyright (c) 2007 SUSE Linux Products GmbH
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* Copyright (c) 2007 Tejun Heo <teheo@suse.de>
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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 <linux/lockdep.h>
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#include <linux/kobject_ns.h>
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#include <linux/atomic.h>
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struct kobject;
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struct module;
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enum kobj_ns_type;
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struct attribute {
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const char *name;
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mode_t mode;
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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struct lock_class_key *key;
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struct lock_class_key skey;
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#endif
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};
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/**
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* sysfs_attr_init - initialize a dynamically allocated sysfs attribute
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* @attr: struct attribute to initialize
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*
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* Initialize a dynamically allocated struct attribute so we can
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* make lockdep happy. This is a new requirement for attributes
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* and initially this is only needed when lockdep is enabled.
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* Lockdep gives a nice error when your attribute is added to
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* sysfs if you don't have this.
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*/
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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#define sysfs_attr_init(attr) \
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do { \
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static struct lock_class_key __key; \
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\
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(attr)->key = &__key; \
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} while(0)
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#else
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#define sysfs_attr_init(attr) do {} while(0)
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#endif
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struct attribute_group {
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const char *name;
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mode_t (*is_visible)(struct kobject *,
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struct attribute *, int);
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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 }, \
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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 }, \
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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 file;
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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 file *, struct kobject *, struct bin_attribute *,
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char *, loff_t, size_t);
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ssize_t (*write)(struct file *,struct kobject *, struct bin_attribute *,
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char *, loff_t, size_t);
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int (*mmap)(struct file *, struct kobject *, struct bin_attribute *attr,
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struct vm_area_struct *vma);
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};
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/**
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* sysfs_bin_attr_init - initialize a dynamically allocated bin_attribute
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* @attr: struct bin_attribute to initialize
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*
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* Initialize a dynamically allocated struct bin_attribute so we
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* can make lockdep happy. This is a new requirement for
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* attributes and initially this is only needed when lockdep is
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* enabled. Lockdep gives a nice error when your attribute is
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* added to sysfs if you don't have this.
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*/
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#define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr)
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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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struct sysfs_dirent;
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#ifdef CONFIG_SYSFS
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int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),
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void *data, struct module *owner);
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int __must_check sysfs_create_dir(struct kobject *kobj);
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void sysfs_remove_dir(struct kobject *kobj);
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int __must_check sysfs_rename_dir(struct kobject *kobj, const char *new_name);
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int __must_check sysfs_move_dir(struct kobject *kobj,
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struct kobject *new_parent_kobj);
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int __must_check sysfs_create_file(struct kobject *kobj,
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const struct attribute *attr);
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int __must_check sysfs_create_files(struct kobject *kobj,
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const struct attribute **attr);
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int __must_check sysfs_chmod_file(struct kobject *kobj,
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const struct attribute *attr, mode_t mode);
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void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
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void sysfs_remove_files(struct kobject *kobj, const struct attribute **attr);
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int __must_check sysfs_create_bin_file(struct kobject *kobj,
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const struct bin_attribute *attr);
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void sysfs_remove_bin_file(struct kobject *kobj,
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const struct bin_attribute *attr);
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int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target,
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const char *name);
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int __must_check sysfs_create_link_nowarn(struct kobject *kobj,
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struct kobject *target,
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const char *name);
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void sysfs_remove_link(struct kobject *kobj, const char *name);
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int sysfs_rename_link(struct kobject *kobj, struct kobject *target,
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const char *old_name, const char *new_name);
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void sysfs_delete_link(struct kobject *dir, struct kobject *targ,
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const char *name);
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int __must_check sysfs_create_group(struct kobject *kobj,
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const struct attribute_group *grp);
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int sysfs_update_group(struct kobject *kobj,
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const struct attribute_group *grp);
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void sysfs_remove_group(struct kobject *kobj,
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const struct attribute_group *grp);
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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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int sysfs_merge_group(struct kobject *kobj,
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const struct attribute_group *grp);
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void sysfs_unmerge_group(struct kobject *kobj,
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const struct attribute_group *grp);
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void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
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void sysfs_notify_dirent(struct sysfs_dirent *sd);
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struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
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const void *ns,
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const unsigned char *name);
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struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd);
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void sysfs_put(struct sysfs_dirent *sd);
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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, struct module *owner)
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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 *kobj)
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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 *kobj)
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{
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}
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static inline int sysfs_rename_dir(struct kobject *kobj, 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 *kobj,
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struct kobject *new_parent_kobj)
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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 *kobj,
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const struct attribute *attr)
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{
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return 0;
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}
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static inline int sysfs_create_files(struct kobject *kobj,
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const struct attribute **attr)
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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,
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const 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 *kobj,
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const struct attribute *attr)
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{
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}
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static inline void sysfs_remove_files(struct kobject *kobj,
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const struct attribute **attr)
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{
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}
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static inline int sysfs_create_bin_file(struct kobject *kobj,
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const struct bin_attribute *attr)
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{
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return 0;
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}
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static inline void sysfs_remove_bin_file(struct kobject *kobj,
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const struct bin_attribute *attr)
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{
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}
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static inline int sysfs_create_link(struct kobject *kobj,
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struct kobject *target, const char *name)
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{
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return 0;
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}
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static inline int sysfs_create_link_nowarn(struct kobject *kobj,
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struct kobject *target,
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const char *name)
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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 *kobj, const char *name)
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{
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}
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static inline int sysfs_rename_link(struct kobject *k, struct kobject *t,
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const char *old_name, const char *new_name)
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{
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return 0;
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}
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static inline void sysfs_delete_link(struct kobject *k, struct kobject *t,
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const char *name)
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{
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}
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static inline int sysfs_create_group(struct kobject *kobj,
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const struct attribute_group *grp)
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{
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return 0;
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}
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static inline int sysfs_update_group(struct kobject *kobj,
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const struct attribute_group *grp)
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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 *kobj,
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const struct attribute_group *grp)
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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 int sysfs_merge_group(struct kobject *kobj,
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const struct attribute_group *grp)
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{
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return 0;
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}
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static inline void sysfs_unmerge_group(struct kobject *kobj,
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const struct attribute_group *grp)
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{
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}
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static inline void sysfs_notify(struct kobject *kobj, const char *dir,
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const char *attr)
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{
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}
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static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
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{
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}
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static inline
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struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
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const void *ns,
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const unsigned char *name)
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{
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return NULL;
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}
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static inline struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd)
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{
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return NULL;
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}
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static inline void sysfs_put(struct sysfs_dirent *sd)
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{
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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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