创建kset

news2024/11/19 23:23:04

1、kset介绍

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2、相关结构体和api介绍

2.1 struct kset

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2.2 kset_create_and_add

kset_create_and_add
	kset_create
	kset_register
		kobject_add_internal
			kobject_add_internal

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2.3 kset_unregister

kset_unregister
	kobject_del
	kobject_put

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3、实验操作

#include<linux/module.h>
#include<linux/init.h>
#include<linux/kernel.h>
#include<linux/kobject.h>
#include<linux/slab.h>

struct kobject *my_kobject01;
struct kobject *my_kobject02;
struct kset *my_kset;
struct kobj_type mytype;

static int my_kobject_init(void)
{
     int ret;
     my_kset = kset_create_and_add("my_kset",NULL,NULL);

     my_kobject01 = kzalloc(sizeof(struct kobject),GFP_KERNEL);
     my_kobject01->kset = my_kset;
     ret = kobject_init_and_add(my_kobject01,&mytype,NULL,"%s","my_kobject01");

     my_kobject02 = kzalloc(sizeof(struct kobject),GFP_KERNEL);
     my_kobject02->kset = my_kset;
     ret = kobject_init_and_add(my_kobject02,&mytype,NULL,"%s","my_kobject02");

     return 0;
}

static void my_kobject_exit(void)
{
     kobject_put(my_kobject01);
     kobject_put(my_kobject02);
     kset_unregister(my_kset);
}

module_init(my_kobject_init);
module_exit(my_kobject_exit);
MODULE_LICENSE("GPL");

//Makefile
obj-m += kset.o
KDIR := /home/johan/share/rk3588/linux_sdk/kernel
PWD ?= $(shell pwd)
all:
	make -C $(KDIR) M=$(PWD) modules
	

clean:
	rm -f *.ko *.o *.mod.o *.mod.c