我正在尝试使用 linux-kernel 4.11 中添加的 sed-opal 库
为此，我编写了一个这样的基本程序：
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <linux/nvme_ioctl.h>
#include <uapi/linux/sed-opal.h>
#include <fcntl.h>
#include <linux/types.h>
int main()
{
int f_desc;
printf("Trying to open device /dev/nvme0...\n");
f_desc = open("/dev/nvme0", O_RDWR);
if(f_desc == 0)
{
printf("Could not open the file..\n");
}
else
{
printf("Open call returns : %d\n", f_desc);
}
struct nvme_admin_cmd cmd = {
.opcode = 0x81, //0x81 Security Send. 0x82 Security Receive
.nsid = 0xffffffff,
.cdw10 = 0x02000000,
};
int ret_ioctl_value;
ret_ioctl_value = ioctl(f_desc, IOC_OPAL_REVERT_TPR, &cmd);
printf("ioctl returned value : %d \n", ret_ioctl_value);
perror("Flush");
close(f_desc);
}
当我想使用上面代码中提到的 sed-opal 库 ioctl 命令时，问题就来了。
Error is like:-
Trying to open device /dev/nvme0...
Open call returns : 3
ioctl returned value : -1
Flush: Inappropriate ioctl for device
这是发送安全 SEND/RECV 命令的正确方法吗？
如果是，错误的可能原因是什么？
任何帮助表示赞赏。:)
谢谢。
Note:
- With the above code the basic NVMe protocol specific ADMIN commands works and i am able to receive response of a SMART health log page from the device.
- I have built /usr/src/linux/block/ directory by Enabling the "Logic for interfacing with OPAL enabled SEDs" from the menuconfig.
- Using 4.13.9 kernel level right now.
==================================================== ====
Edit:
So it is supposed to be done as follows:
open(/dev/nvme0n1");
set up opal_structures here from /uapi/linux/sed-opal.h
ioctl(fd, IOC_OPAL_*, &struct_from_above);