nvme-get-property - Reads and shows the defined NVMe controller property for NVMe over Fabric

NAME  SYNOPSIS  DESCRIPTION  OPTIONS  EXAMPLES  BUGS  NVME 

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NAME

nvme-get-property − Reads and shows the defined NVMe controller property for NVMe over Fabric

SYNOPSIS

nvme get−property <device> [−−offset=<offset> | −O <offset>]
[−−human−readable | −H]
[−−output−format=<fmt> | −o <fmt>] [−−verbose | −v]
[−−timeout=<timeout> | −t <timeout>]

DESCRIPTION

Reads and shows the defined NVMe controller property for NVMe over Fabric.

OPTIONS

−O <offset>, −−offset=<offset>

The offset of the property. One of CAP=0x0, VS=0x8, CC=0x14, CSTS=0x1c, NSSR=0x20

−H

−−human−readable: Show the fields packed in the property

−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.

−t <timeout>, −−timeout=<timeout>

Override default timeout value. In milliseconds.

EXAMPLES

• The following will run the get−property command with offset 0

# nvme get−property /dev/nvme0 −−offset=0x0 −−human−readable

BUGS

Currently the CAP value is truncated to 32 bits due to a limitation in the ioctl interface.

In a recent enough kernel, the 64 bit value is shown in kernel traces.

• First enable traces by this command

# echo 1 > /sys/kernel/debug/tracing/events/nvme/enable

• Then look for NVMe Fabrics command (0x7f) at trace

/sys/kernel/debug/tracing/trace

NVME

Part of the nvme−user suite

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