nvme-io-passthru(1)

SYNOPSIS

nvme-io-passthru <device> [--opcode=<opcode> | -O <opcode>]
+                        [--flags=<flags> | -f <flags>] [-rsvd=<rsvd> | -R <rsvd>]
+                        [--namespace-id=<nsid> | -nsid <nsid>]
+                        [--cdw2=<cdw2>] [--cdw3=<cdw3>] [--cdw10=<cdw10>]
+                        [--cdw11=<cdw11>] [--cdw12=<cdw12>] [--cdw13=<cdw13>]
+                        [--cdw14=<cdw14>] [--cdw15=<cdw15>]
+                        [--data-len=<data-len> | -l <data-len>]
+                        [--metadata-len=<len> | -m <len>]
+                        [--read | -r] [--write | -w]
+                        [--input-file=<file> | -i <file>]
+                        [--metadata=<file> | -M <file>]
+                        [--timeout=<to> | -t <to>] [--show-command | -s]
+                        [--dry-run | -d] [--raw-binary | -b]
+                        [--prefill=<prefill> | -p <prefill>]
+                        [--latency | -T]
+                        [--output-format=<fmt> | -o <fmt>] [--verbose | -v]

DESCRIPTION

Submits an arbitrary NVMe IO command and returns the applicable +results. This may be the simply the command’s 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 +
+
+-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. Defaults to 0. +
+
+--cdw[2-3,10-15]=<cdw> +: +
+ Specifies the command dword value for that specified entry in + the command +
+
+-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. If the command is a data-in (read) command, the data + returned from the device will be saved here. +
+
+-M <file> +
+--metadata=<file> +: +
+ If the command is a data-out (write) command, use this file + to fill the metadata buffer sent to the device. If no file is given, + assumed to use STDIN. If the command is a data-in (read) command, the + metadata returned from the device will be saved here. +
+
+-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 + data or a structure. +
+
+-p <prefill> +
+--prefill <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 on a data-in command. +
+
+-T +
+--latency +: +
+ Print out the latency the IOCTL took (in us). +
+
+-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

nvme io-passthru /dev/nvme0n1 --opcode=2 --namespace-id=1 --data-len=4096 --read --cdw10=0 --cdw11=0 --cdw12=0x70000 --raw-binary

NVME

Part of the nvme-user suite

+nvme-io-passthru(1) Manual Page +

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

EXAMPLES

NVME