nvme-mangoboost-id-ctrl(1)

# nvme-mangoboost-id-ctrl(1) Manual Page

## NAME

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

## SYNOPSIS

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

## 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.

If having the program decode the output for readability, this version will decode MangoBoost vendor unique portions of the structure.

## 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 <fmt>
--output-format=<fmt>

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

-v
--verbose

  Increase the information detail in the output.

## EXAMPLES

- Has the program interpret the returned buffer and display the known fields in a human readable format:

      # nvme mangoboost id-ctrl /dev/nvme0

- In addition to showing the known fields, has the program to display the vendor unique field:

      # nvme mangoboost id-ctrl /dev/nvme0 --vendor-specific
      # nvme mangoboost id-ctrl /dev/nvme0 -V

  The above will dump the vs buffer in hex since it doesn’t know how to interpret it.

- Have the program return the raw structure in binary:

      # nvme mangoboost id-ctrl /dev/nvme0 --raw-binary > id_ctrl.raw
      # nvme mangoboost id-ctrl /dev/nvme0 -b > id_ctrl.raw

  It is probably a bad idea to not redirect stdout when using this mode.

- Alternatively you may want to send the data to another program that can parse the raw buffer.

      # nvme mangoboost id-ctrl /dev/nvme0 --raw-binary | nvme_parse_id_ctrl

  The parse program in the above example can be a program that shows the structure in a way you like. The following program is such an example that will parse it and can accept the output through a pipe, `'|'`, as shown in the above example, or you can `'cat'` a saved output buffer to it.

    /* 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