nvme-admin-passthru(1)

NAME

nvme-admin-passthru - Submit an arbitrary admin command, return results

SYNOPSIS

nvme [<global-options>] admin-passthru <device>
                        [--opcode=<opcode> | -O <opcode>]
                        [--flags=<flags> | -f <flags>]
                        [-rsvd=<rsvd> | -R <rsvd>]
                        [--namespace-id=<nsid> | -n <nsid>]
                        [--cdw2=<cdw2> | -2 <cdw2>]
                        [--cdw3=<cdw3> | -3 <cdw3>]
                        [--cdw10=<cdw10> | -4 <cdw10>]
                        [--cdw11=<cdw11> | -5 <cdw11>]
                        [--cdw12=<cdw12> | -6 <cdw12>]
                        [--cdw13=<cdw13> | -7 <cdw13>]
                        [--cdw14=<cdw14> | -8 <cdw14>]
                        [--cdw15=<cdw15> | -9 <cdw15>]
                        [--data-len=<data-len> | -l <data-len>]
                        [--metadata-len=<len> | -m <len>]
                        [--input-file=<file> | -i <file>]
                        [--read | -r] [--write | -w]
                        [--show-command | -s]
                        [--dry-run | -d]
                        [--raw-binary | -b]
                        [--prefill=<prefill> | -p <prefill>]
                        [--latency | -T]

DESCRIPTION

Submits an arbitrary NVMe admin command and returns the applicable results. This may be the simply the commands result and status, or may also include a buffer if the command returns one. This command does no interpretation of the opcodes or options.

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 returned structure (if applicable) may be returned in one of several ways depending on the option flags; the structure may printed by the program as a hex dump, or may be returned as a raw buffer printed to stdout for another program to parse.

OPTIONS

-O <opcode>, --opcode=<opcode>

The NVMe opcode to send to the device in the command Required argument as this param is mandatory.

-f <flags>, --flags=<flags>

The NVMe command flags to send to the device in the command

-R <rsvd>, --rsvd=<rsvd>

The value for the reserved field in the command.

-n <nsid>, --namespace-id=<nsid>

The value for the ns-id in the command. The broadcast value 0xffffffff can also be given as all or -1.

-[2-9] <cdw>, --cdw[2-3,10-15]=<cdw>

-r, --read, -w, --write

Used for the data-direction for the command and required for commands sending/receiving data. Don’t use both read and write at the same time.

-i <file>, --input-file=<file>

If the command is a data-out (write) command, use this file to fill the buffer sent to the device. If no file is given, assumed to use STDIN.

-l <data-len>, --data-len=<data-len>

The data length for the buffer used for this command.

-m <data-len>, --metadata-len=<data-len>

The metadata length for the buffer used for this command.

-s, --show-cmd

Print out the command to be sent.

-d, --dry-run

Do not actually send the command. If want to use --dry-run option, --show-cmd option must be set. Otherwise --dry-run option will be ignored.

-b, --raw-binary

Print the raw returned buffer to stdout if the command returns a structure.

-p, --prefill

Prefill the buffer with a predetermined byte value. Defaults to 0. This may be useful if the data you are writing is shorter than the required buffer, and you need to pad it with a known value. It may also be useful if you need to confirm if a device is overwriting a buffer for a data-in command.

-T, --latency

Print out the latency the IOCTL took (in us).

GLOBAL OPTIONS

The following options are defined at the top-level nvme command and are available to this subcommand:

--dry-run

Print the command that would be executed, but do not actually execute it.

--no-ioctl-probing

Disable probing for 64-bit IOCTL support.

--no-retries

Disable retry logic on transient errors.

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

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

--output-format-version=<version>

Select the output format version. Version 1 uses the original field naming, while version 2 (default) provides more consistent and script-friendly field names. Other versions are rejected.

--quiet

Suppress informational messages. Errors are still reported, and --quiet cancels any --verbose for the library log level.

--set-options=<key=value>[,<key=value>...]

Set libnvme library options for this invocation. Supported keys are force-4k, mi-probe-enabled, test-base-dir and test-sysfs-dir.

--timeout=<ms>

Set the timeout for the command in milliseconds. infinite or -1 waits without a time limit (0xffffffff).

-v, --verbose

Increase the level of detail in the output. May be specified multiple times to further increase verbosity.

These options can also be set as machine-wide defaults in nvme-cli.conf(5). A command-line flag always overrides the file.

EXAMPLES

# nvme admin-passthru /dev/nvme0 --opcode=0x06 --data-len=4096 --cdw10=1 -r

# nvme admin-passthru /dev/nvme0 --opcode=0x06 --data-len=4096 --cdw10=1 -r -b > id_ns.raw

NVME

Part of the nvme-user suite