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nvme_admin_ndp_v2.c
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nvme_admin_ndp_v2.c
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#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include "nvme-ioctl.h"
#include "linux/nvme.h"
#define MAX_LEN (40960)
void help(char *app)
{
printf("help:\n%s /dev/nvme0\n", app);
exit(0);
}
int ioctl_submit(char *buffer, int buffer_len, char *dev, int length, char *file_name)
{
int ret;
NvmeNdpCmd_v2 cmd;
uint64_t lba_list[20];
for(int i=0; i<20; i++){
lba_list[i] = i*4;
}
memset(&cmd, 0, sizeof(cmd));
int fd = open(dev, O_RDONLY);
if (fd < 0)
{
printf("open %s fail\n", dev);
return -2;
}
cmd.nsid = 1;
cmd.opcode = nvme_admin_ndp;
cmd.prp1_lba_list_addr = (uint64_t)lba_list;
cmd.prp1 = (uint64_t)buffer;
cmd.metadata_len = sizeof(lba_list);
cmd.result_buffer_len = buffer_len;
//cmd.data_len = length; //PAGE数目
/*
case NVME_IOCTL_IO_CMD:
ret = nvme_user_cmd(ns->ctrl, ns, argp);
break;
case NVME_IOCTL_SUBMIT_IO:
ret = nvme_submit_io(ns, argp);
//使用NVME_IOCTL_SUBMIT_IO本地NVMe驱动也需要更改,而NVME_IOCTL_IO_CMD则没有对参数进行限制,可以在femu内部使用如下命令测试通路正确性:
nvme io-passthru /dev/nvme0 --opcode=0x20 --namespace-id=0x1 --data-len=4096 --write -i nvme_tcp.sh -b -s
*/
ret=ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd);//若使用NVME_IOCTL_SUBMIT_IO本地NVMe驱动也需要更改
if(ret){
close(fd);
perror("fail to ioctl\n");
exit(-1);
}
close(fd);
printf("result:%d\n", ret);
}
int main(int argc, char **argv)
{
char *buffer;
int ret;
if (argc < 2)
{
help(argv[0]);
return 0;
}
buffer = malloc(MAX_LEN);
if (!buffer)
{
printf("fail to malloc\n");
return 0;
}
memset(buffer, 0, MAX_LEN);
ret = ioctl_submit(buffer, MAX_LEN, argv[1], MAX_LEN, argv[2]);
printf("ndp command result:\n\n");
for(int i=0; i<100; i++){
printf("%x ", buffer[i]);
if(i%16 == 15 || i==100) putchar('\n');
}
free(buffer);
printf("successfully execute NDP command!\n");
return 0;
}