The following are all implemented sub-commands:
  list                  List all NVMe devices and namespaces on machine
  list-subsys           List nvme subsystems
  id-ctrl               Send NVMe Identify Controller
  id-ns                 Send NVMe Identify Namespace, display structure
  list-ns               Send NVMe Identify List, display structure
  ns-descs              Send NVMe Namespace Descriptor List, display structure
  id-nvmset             Send NVMe Identify NVM Set List, display structure
  create-ns             Creates a namespace with the provided parameters
  delete-ns             Deletes a namespace from the controller
  attach-ns             Attaches a namespace to requested controller(s)
  detach-ns             Detaches a namespace from requested controller(s)
  list-ctrl             Send NVMe Identify Controller List, display structure
  get-ns-id             Retrieve the namespace ID of opened block device
  get-log               Generic NVMe get log, returns log in raw format
  telemetry-log         Retrieve FW Telemetry log write to file
  fw-log                Retrieve FW Log, show it
  changed-ns-list-log   Retrieve Changed Namespace List, show it
  smart-log             Retrieve SMART Log, show it
  ana-log               Retrieve ANA Log, show it
  error-log             Retrieve Error Log, show it
  effects-log           Retrieve Command Effects Log, show it
  endurance-log         Retrieve Endurance Group Log, show it
  get-feature           Get feature and show the resulting value
  device-self-test      Perform the necessary tests to observe the performance
  self-test-log         Retrieve the SELF-TEST Log, show it
  set-feature           Set a feature and show the resulting value
  set-property          Set a property and show the resulting value
  get-property          Get a property and show the resulting value
  format                Format namespace with new block format
  fw-commit             Verify and commit firmware to a specific slot (fw-activate in old version < 1.2)
  fw-download           Download new firmware
  admin-passthru        Submit an arbitrary admin command, return results
  io-passthru           Submit an arbitrary IO command, return results
  security-send         Submit a Security Send command, return results
  security-recv         Submit a Security Receive command, return results
  resv-acquire          Submit a Reservation Acquire, return results
  resv-register         Submit a Reservation Register, return results
  resv-release          Submit a Reservation Release, return results
  resv-report           Submit a Reservation Report, return results
  dsm                   Submit a Data Set Management command, return results
  flush                 Submit a Flush command, return results
  compare               Submit a Compare command, return results
  read                  Submit a read command, return results
  write                 Submit a write command, return results
  write-zeroes          Submit a write zeroes command, return results
  write-uncor           Submit a write uncorrectable command, return results
  sanitize              Submit a sanitize command
  sanitize-log          Retrieve sanitize log, show it
  reset                 Resets the controller
  subsystem-reset       Resets the subsystem
  ns-rescan             Rescans the NVME namespaces
  show-regs             Shows the controller registers or properties. Requires character device
  discover              Discover NVMeoF subsystems
  connect-all           Discover and Connect to NVMeoF subsystems
  connect               Connect to NVMeoF subsystem
  disconnect            Disconnect from NVMeoF subsystem
  disconnect-all        Disconnect from all connected NVMeoF subsystems
  gen-hostnqn           Generate NVMeoF host NQN
  dir-receive           Submit a Directive Receive command, return results
  dir-send              Submit a Directive Send command, return results
  virt-mgmt             Manage Flexible Resources between Primary and Secondary Controller
  version               Shows the program version
  help                  Display this help