OPAL-SED-Bibliothek ioctl Verwendung?

Question

Ich versuche, die sed-Opal-Bibliotheken in der das tun

4.11 Linux-Kernel hinzugefügt zu verwenden, ich habe ein Basisprogramm wie folgt geschrieben:

#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); 

} 

Problem kommt, wenn ich verwenden will Die sed-opal-Bibliothek ioctl-Befehle wie im obigen Code erwähnt.

Error is like:- 
Trying to open device /dev/nvme0... 
Open call returns : 3 
ioctl returned value : -1 
Flush: Inappropriate ioctl for device 

Error is like:- 
Trying to open device /dev/nvme0... 
Open call returns : 3 
ioctl returned value : -1 
Flush: Inappropriate ioctl for device 

Ist dies der richtige Weg, um die Security SEND/RECV Befehle zu senden?

Wenn ja, was könnte die mögliche Ursache für den Fehler sein?

Jede Hilfe wird geschätzt. :)

Danke.

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); 

Answer 1

Versuchen Sie es mit sed_ioctl statt ioctl. was in 'sed-opal.h' definiert ist

Syntax ist ähnlich.

int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *ioctl_ptr); 

wo wie ioctl ist.

int ioctl(int fd, unsigned long request, ...);