nvme-get-property - Man Page

nvme get-property <device> [--offset=<offset> | -o <offset>]
                                [--human-readable | -H ]

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

-o,  --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

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

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

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

Part of the nvme-user suite

nvme(1).