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IOCTL内核指令接口 + 风控实时打分函数（追加进原有工程）

news 2026/6/7 7:11:08

补充：IOCTL内核指令接口 + 风控实时打分函数（追加进原有工程）

一、在 engine_config.h 头部追加IOCTL宏定义
//===== IOCTL 情感封印内核指令控制码 =====
#define ENGINE_IOC_MAGIC ‘S’
//三条情感封印指令下发
#define CMD_SEAL_1 _IOW(ENGINE_IOC_MAGIC, 1, unsigned int)
#define CMD_SEAL_2 _IOW(ENGINE_IOC_MAGIC, 2, unsigned int)
#define CMD_SEAL_3 _IOW(ENGINE_IOC_MAGIC, 3, unsigned int)
//分支预测掩码寄存器配置
#define CMD_BRANCH_REG _IOW(ENGINE_IOC_MAGIC, 4, unsigned int)
//IRQ偏移配置
#define CMD_IRQ_CFG _IOW(ENGINE_IOC_MAGIC, 5, unsigned int)

//风控结构体（用户态<->内核态交互）
typedef struct{
float weight_name;
float weight_time;
float weight_semantic;
float score_base;
float score_cur;
unsigned char is_s_lock; //1=触发S级锁定
}RiskCalcArg;
#define IOC_RISK_CALC _IOWR(ENGINE_IOC_MAGIC,6,RiskCalcArg)
二、engine_config.c 新增：IOCTL调用函数 + 风控打分计算函数
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>

//全局内核设备节点路径
#define ENGINE_DEV_PATH “/dev/engine_seal_dev”
static int g_dev_fd = -1;

/**

@brief 打开内核驱动设备
return:0成功 <0失败
*/
int engine_dev_open(void)
{
g_dev_fd = open(ENGINE_DEV_PATH, O_RDWR);
if(g_dev_fd < 0){
perror(“open engine dev fail”);
return -1;
}
return 0;
}

/**

@brief 下发三级情感封印内核指令
*/
int engine_send_seal_cmd(void)
{
int ret;
unsigned int val;
//指令1:0x734201
val = EMOTION_CMD1;
ret = ioctl(g_dev_fd, CMD_SEAL_1, &val);
if(ret < 0) goto err_ioctl;
//指令2:0x734202
val = EMOTION_CMD2;
ret = ioctl(g_dev_fd, CMD_SEAL_2, &val);
if(ret < 0) goto err_ioctl;
//指令3:0x734203
val = EMOTION_CMD3;
ret = ioctl(g_dev_fd, CMD_SEAL_3, &val);
if(ret < 0) goto err_ioctl;
//配置分支预测掩码寄存器
val = BRANCH_MASK_REG;
ret = ioctl(g_dev_fd, CMD_BRANCH_REG, &val);
if(ret < 0) goto err_ioctl;
//配置IRQ基础偏移
val = IRQ_OFFSET;
ret = ioctl(g_dev_fd, CMD_IRQ_CFG, &val);
if(ret < 0) goto err_ioctl;
printf(“[INFO] All seal cmd send success\n”);
return 0;
err_ioctl:
perror(“ioctl send cmd failed”);
return -1;
}

/**

@brief 关闭设备
*/
void engine_dev_close(void)
{
if(g_dev_fd > 0) close(g_dev_fd);
g_dev_fd = -1;
}

/**

@brief 本地风控打分计算函数（算法层）
param name_val:称谓特征分值 | time_val:会话时长分值 | sem_val:语义特征分值
return 综合得分
*/
float risk_calc_score(float name_val, float time_val, float sem_val)
{
const RiskControl *rc = &g_engine_cfg;
float total = RISK_HIGH_BASE_SCORE
+ name_val * RISK_WEIGHT_CALL
+ time_val * RISK_WEIGHT_DURATION
+ sem_val * RISK_WEIGHT_SEMANTIC;
return total;
}

/**

@brief 调用内核驱动完成风控打分、S级锁定判定
return 0正常 1触发S锁 <0异常
*/
int risk_control_kernel_calc(float name_val, float time_val, float sem_val)
{
RiskCalcArg arg;
memset(&arg,0,sizeof(arg));
arg.weight_name = RISK_WEIGHT_CALL;
arg.weight_time = RISK_WEIGHT_DURATION;
arg.weight_semantic = RISK_WEIGHT_SEMANTIC;
arg.score_base = RISK_HIGH_BASE_SCORE;
//本地预计算
arg.score_cur = risk_calc_score(name_val,time_val,sem_val);
int ret = ioctl(g_dev_fd, IOC_RISK_CALC, &arg);
if(ret < 0){
perror(“risk ioctl calc fail”);
return -1;
}
if(arg.is_s_lock){
printf(“[ALERT] Risk Score:%.2f >= %.2f , S level locked!\n”,arg.score_cur,RISK_S_LOCK_SCORE);
return 1;
}else{
printf(“[INFO] Risk Score:%.2f , no lock\n”,arg.score_cur);
return 0;
}
}
三、main函数测试代码替换（原有main修改）
#ifdef CONFIG_MAIN_TEST
int main(void)
{
int ret = engine_load_config();
if(ret != 0) return -1;
//1.打开驱动设备
ret = engine_dev_open();
if(ret == 0){
//2.下发封印内核指令
engine_send_seal_cmd();
```
//3.模拟一组会话数据做风控打分测试 //示例参数：称谓得分5，时长得分4，语义得分6 risk_control_kernel_calc(5.0f,4.0f,6.0f); //模拟高危数据触发S锁：称谓10、时长9、语义8 risk_control_kernel_calc(10.0f,9.0f,8.0f); engine_dev_close();
```
}
return 0;
}
#endif
四、配套Linux内核驱动模板（engine_dev.c，编译ko用）
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/cdev.h>
#include <linux/errno.h>

#define DEV_NAME “engine_seal_dev”
static dev_t devno;
static struct cdev engine_cdev;

//ioctl回调
static long engine_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
unsigned int cfg_val;
RiskCalcArg rarg;

switch(cmd){ case CMD_SEAL_1: copy_from_user(&cfg_val,(void __user *)arg,sizeof(cfg_val)); pr_info("Set Seal Cmd1 = 0x%X\n",cfg_val); break; case CMD_SEAL_2: copy_from_user(&cfg_val,(void __user *)arg,sizeof(cfg_val)); pr_info("Set Seal Cmd2 = 0x%X\n",cfg_val); break; case CMD_SEAL_3: copy_from_user(&cfg_val,(void __user *)arg,sizeof(cfg_val)); pr_info("Set Seal Cmd3 = 0x%X\n",cfg_val); break; case CMD_BRANCH_REG: copy_from_user(&cfg_val,(void __user *)arg,sizeof(cfg_val)); pr_info("Set Branch Reg = 0x%X\n",cfg_val); break; case CMD_IRQ_CFG: copy_from_user(&cfg_val,(void __user *)arg,sizeof(cfg_val)); pr_info("Set IRQ Offset = 0x%X\n",cfg_val); break; case IOC_RISK_CALC: copy_from_user(&rarg,(void __user *)arg,sizeof(rarg)); //内核判定是否触发S锁 if(rarg.score_cur >= RISK_S_LOCK_SCORE){ rarg.is_s_lock = 1; }else{ rarg.is_s_lock = 0; } copy_to_user((void __user *)arg,&rarg,sizeof(rarg)); pr_info("Kernel Risk Calc score:%.2f, lock:%d\n",rarg.score_cur,rarg.is_s_lock); break; default: return -EINVAL; } return 0;

}

static struct file_operations engine_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = engine_ioctl,
};

static int __init engine_dev_init(void)
{
alloc_chrdev_region(&devno,0,1,DEV_NAME);
cdev_init(&engine_cdev,&engine_fops);
cdev_add(&engine_cdev,devno,1);
pr_info(“%s driver install ok\n”,DEV_NAME);
return 0;
}
static void __exit engine_dev_exit(void)
{
cdev_del(&engine_cdev);
unregister_chrdev_region(devno,1);
pr_info(“%s driver uninstall\n”,DEV_NAME);
}
module_init(engine_dev_init);
module_exit(engine_dev_exit);
MODULE_LICENSE(“GPL”);
五、使用步骤