nvme-id-ctrl man page

nvme-id-ctrl — Send NVMe Identify Controller, return result and structure

Synopsis

nvme id-ctrl <device> [-v | --vendor-specific] [-b | --raw-binary]
                        [-o <fmt> | --output-format=<fmt>]

Description

For the NVMe device given, sends an identify controller command and provides the result and returned structure.

The <device> parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1).

On success, the structure may be returned in one of several ways depending on the option flags; the structure may be parsed by the program or the raw buffer may be printed to stdout.

Options

-b, --raw-binary

Print the raw buffer to stdout. Structure is not parsed by program. This overrides the vendor specific and human readable options.

-v, --vendor-specific

In addition to parsing known fields, this option will dump the vendor specific region of the structure in hex with ascii interpretation.

-H, --human-readable

This option will parse and format many of the bit fields into human-readable formats.

-o <format>, --output-format=<format>

Set the reporting format to normal, json, or binary. Only one output format can be used at a time.

Examples

/* File: nvme_parse_id_ctrl.c */

#include <linux/nvme.h>
#include <stdio.h>
#include <unistd.h>

int main(int argc, char **argv)
{
        unsigned char buf[sizeof(struct nvme_id_ctrl)];
        struct nvme_id_ctrl *ctrl = (struct nvme_id_ctrl *)buf;

        if (read(STDIN_FILENO, buf, sizeof(buf)))
                return 1;

        printf("vid   : %#x\n", ctrl->vid);
        printf("ssvid : %#x\n", ctrl->ssvid);
        return 0;
}

Nvme

Part of the nvme-user suite

Referenced By

nvme(1).

05/18/2017 NVMe Manual