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#!/usr/bin/python3
# Copyright (c) 2021, Dell Inc. or its subsidiaries. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
# See the LICENSE file for details.
#
# This file is part of NVMe STorage Appliance Services (nvme-stas).
#
# Authors: Martin Belanger <Martin.Belanger@dell.com>
#
''' STorage Appliance Connector Control Utility
'''
import sys
import json
import pprint
from argparse import ArgumentParser
import dasbus.error
from dasbus.connection import SystemMessageBus
from staslib import defs
def tron(args): # pylint: disable=unused-argument
'''@brief Trace ON'''
bus = SystemMessageBus()
iface = bus.get_proxy(defs.STACD_DBUS_NAME, defs.STACD_DBUS_PATH)
iface.tron = True # pylint: disable=assigning-non-slot
print(f'tron = {iface.tron}') # Read value back from stacd and print
def troff(args): # pylint: disable=unused-argument
'''@brief Trace OFF'''
bus = SystemMessageBus()
iface = bus.get_proxy(defs.STACD_DBUS_NAME, defs.STACD_DBUS_PATH)
iface.tron = False # pylint: disable=assigning-non-slot
print(f'tron = {iface.tron}') # Read value back from stacd and print
def _extract_cid(ctrl):
return (
ctrl['transport'],
ctrl['traddr'],
ctrl['trsvcid'],
ctrl['subsysnqn'],
ctrl['host-traddr'],
ctrl['host-iface'],
ctrl['host-nqn'],
)
def status(args): # pylint: disable=unused-argument
'''@brief retrieve stacd's status information'''
bus = SystemMessageBus()
iface = bus.get_proxy(defs.STACD_DBUS_NAME, defs.STACD_DBUS_PATH)
info = json.loads(iface.process_info())
info['controllers'] = iface.list_controllers(True)
for controller in info['controllers']:
transport, traddr, trsvcid, subsysnqn, host_traddr, host_iface, host_nqn = _extract_cid(controller)
controller.update(
json.loads(iface.controller_info(transport, traddr, trsvcid, subsysnqn, host_traddr, host_iface, host_nqn))
)
print(pprint.pformat(info, width=120))
def ls(args):
'''@brief list the I/O controller's that stacd is
connected (or trying to connect) to.
'''
bus = SystemMessageBus()
iface = bus.get_proxy(defs.STACD_DBUS_NAME, defs.STACD_DBUS_PATH)
info = iface.list_controllers(args.detailed)
print(pprint.pformat(info, width=120))
PARSER = ArgumentParser(description='STorage Appliance Connector (STAC)')
PARSER.add_argument('-v', '--version', action='store_true', help='Print version, then exit', default=False)
SUBPARSER = PARSER.add_subparsers(title='Commands')
PRSR = SUBPARSER.add_parser('tron', help='Trace ON')
PRSR.set_defaults(func=tron)
PRSR = SUBPARSER.add_parser('troff', help='Trace OFF')
PRSR.set_defaults(func=troff)
PRSR = SUBPARSER.add_parser('status', help='Show runtime status information about stacd')
PRSR.set_defaults(func=status)
PRSR = SUBPARSER.add_parser('ls', help='List I/O controllers')
PRSR.add_argument(
'-d', '--detailed', action='store_true', help='Print detailed info (default: "%(default)s")', default=False
)
PRSR.set_defaults(func=ls)
ARGS = PARSER.parse_args()
if ARGS.version:
print(f'nvme-stas {defs.VERSION}')
sys.exit(0)
try:
ARGS.func(ARGS)
except dasbus.error.DBusError:
sys.exit('Unable to communicate with stacd over D-Bus. Is stacd running?')
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