numam-spdk/scripts/rpc.py

#!/usr/bin/env python

from rpc.client import print_dict, JSONRPCException

import argparse
import rpc

try:
    from shlex import quote
except ImportError:
    from pipes import quote


def print_array(a):
    print(" ".join((quote(v) for v in a)))


def call_cmd(func):
    def rpc_cmd(*args, **kwargs):
        try:
            func(*args, **kwargs)
        except JSONRPCException as ex:
            print(ex.message)
            exit(1)
    return rpc_cmd


if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        description='SPDK RPC command line interface')
    parser.add_argument('-s', dest='server_addr',
                        help='RPC server address', default='/var/tmp/spdk.sock')
    parser.add_argument('-p', dest='port',
                        help='RPC port number (if server_addr is IP address)',
                        default=5260, type=int)
    parser.add_argument('-t', dest='timeout',
                        help='Timout as a floating point number expressed in seconds waiting for reponse. Default: 60.0',
                        default=60.0, type=float)
    parser.add_argument('-v', dest='verbose',
                        help='Verbose mode', action='store_true')
    subparsers = parser.add_subparsers(help='RPC methods')

    @call_cmd
    def start_subsystem_init(args):
        rpc.start_subsystem_init(args.client)

    p = subparsers.add_parser('start_subsystem_init', help='Start initialization of subsystems')
    p.set_defaults(func=start_subsystem_init)

    @call_cmd
    def get_rpc_methods(args):
        print_dict(rpc.get_rpc_methods(args.client, args))

    p = subparsers.add_parser('get_rpc_methods', help='Get list of supported RPC methods')
    p.add_argument('-c', '--current', help='Get list of RPC methods only callable in the current state.', action='store_true')
    p.set_defaults(func=get_rpc_methods)

    @call_cmd
    def save_config(args):
        rpc.save_config(args.client, args)

    p = subparsers.add_parser('save_config', help="""Write current (live) configuration of SPDK subsystems and targets.
    If no filename is given write configuration to stdout.""")
    p.add_argument('-f', '--filename', help="""File where to save JSON configuration to.""")
    p.add_argument('-i', '--indent', help="""Indent level. Value less than 0 mean compact mode. If filename is not given default
    indent level is 2. If writing to file of filename is '-' then default is compact mode.""", type=int, default=2)
    p.set_defaults(func=save_config)

    @call_cmd
    def load_config(args):
        rpc.load_config(args.client, args)

    p = subparsers.add_parser('load_config', help="""Configure SPDK subsystems and tagets using JSON RPC. If no file is
    provided or file is '-' read configuration from stdin.""")
    p.add_argument('-f', '--filename', help="""JSON Configuration file.""")
    p.set_defaults(func=load_config)

    @call_cmd
    def load_subsystem_config(args):
        rpc.load_subsystem_config(args.client, args)

    p = subparsers.add_parser('load_subsystem_config', help="""Configure SPDK subsystem using JSON RPC. If no file is
    provided or file is '-' read configuration from stdin.""")
    p.add_argument('--filename', help="""JSON Configuration file.""")
    p.set_defaults(func=load_subsystem_config)

    # app
    @call_cmd
    def kill_instance(args):
        rpc.app.kill_instance(args.client,
                              sig_name=args.sig_name)

    p = subparsers.add_parser('kill_instance', help='Send signal to instance')
    p.add_argument('sig_name', help='signal will be sent to server.')
    p.set_defaults(func=kill_instance)

    @call_cmd
    def context_switch_monitor(args):
        enabled = None
        if args.enable:
            enabled = True
        if args.disable:
            enabled = False
        print_dict(rpc.app.context_switch_monitor(args.client,
                                                  enabled=enabled))

    p = subparsers.add_parser('context_switch_monitor', help='Control whether the context switch monitor is enabled')
    p.add_argument('-e', '--enable', action='store_true', help='Enable context switch monitoring')
    p.add_argument('-d', '--disable', action='store_true', help='Disable context switch monitoring')
    p.set_defaults(func=context_switch_monitor)

    # bdev
    @call_cmd
    def set_bdev_options(args):
        rpc.bdev.set_bdev_options(args.client,
                                  bdev_io_pool_size=args.bdev_io_pool_size,
                                  bdev_io_cache_size=args.bdev_io_cache_size)

    p = subparsers.add_parser('set_bdev_options', help="""Set options of bdev subsystem""")
    p.add_argument('-p', '--bdev-io-pool-size', help='Number of bdev_io structures in shared buffer pool', type=int)
    p.add_argument('-c', '--bdev-io-cache-size', help='Maximum number of bdev_io structures cached per thread', type=int)
    p.set_defaults(func=set_bdev_options)

    @call_cmd
    def construct_malloc_bdev(args):
        num_blocks = (args.total_size * 1024 * 1024) // args.block_size
        print_array(rpc.bdev.construct_malloc_bdev(args.client,
                                                   num_blocks=num_blocks,
                                                   block_size=args.block_size,
                                                   name=args.name,
                                                   uuid=args.uuid))

    p = subparsers.add_parser('construct_malloc_bdev',
                              help='Add a bdev with malloc backend')
    p.add_argument('-b', '--name', help="Name of the bdev")
    p.add_argument('-u', '--uuid', help="UUID of the bdev")
    p.add_argument(
        'total_size', help='Size of malloc bdev in MB (int > 0)', type=int)
    p.add_argument('block_size', help='Block size for this bdev', type=int)
    p.set_defaults(func=construct_malloc_bdev)

    @call_cmd
    def construct_null_bdev(args):
        num_blocks = (args.total_size * 1024 * 1024) // args.block_size
        print_array(rpc.bdev.construct_null_bdev(args.client,
                                                 num_blocks=num_blocks,
                                                 block_size=args.block_size,
                                                 name=args.name,
                                                 uuid=args.uuid))

    p = subparsers.add_parser('construct_null_bdev',
                              help='Add a bdev with null backend')
    p.add_argument('name', help='Block device name')
    p.add_argument('-u', '--uuid', help='UUID of the bdev')
    p.add_argument(
        'total_size', help='Size of null bdev in MB (int > 0)', type=int)
    p.add_argument('block_size', help='Block size for this bdev', type=int)
    p.set_defaults(func=construct_null_bdev)

    @call_cmd
    def construct_aio_bdev(args):
        print_array(rpc.bdev.construct_aio_bdev(args.client,
                                                filename=args.filename,
                                                name=args.name,
                                                block_size=args.block_size))

    p = subparsers.add_parser('construct_aio_bdev',
                              help='Add a bdev with aio backend')
    p.add_argument('filename', help='Path to device or file (ex: /dev/sda)')
    p.add_argument('name', help='Block device name')
    p.add_argument('block_size', help='Block size for this bdev', type=int, nargs='?', default=0)
    p.set_defaults(func=construct_aio_bdev)

    @call_cmd
    def construct_nvme_bdev(args):
        print_array(rpc.bdev.construct_nvme_bdev(args.client,
                                                 name=args.name,
                                                 trtype=args.trtype,
                                                 traddr=args.traddr,
                                                 adrfam=args.adrfam,
                                                 trsvcid=args.trsvcid,
                                                 subnqn=args.subnqn))

    p = subparsers.add_parser('construct_nvme_bdev',
                              help='Add bdev with nvme backend')
    p.add_argument('-b', '--name', help="Name of the bdev", required=True)
    p.add_argument('-t', '--trtype',
                   help='NVMe-oF target trtype: e.g., rdma, pcie', required=True)
    p.add_argument('-a', '--traddr',
                   help='NVMe-oF target address: e.g., an ip address or BDF', required=True)
    p.add_argument('-f', '--adrfam',
                   help='NVMe-oF target adrfam: e.g., ipv4, ipv6, ib, fc, intra_host')
    p.add_argument('-s', '--trsvcid',
                   help='NVMe-oF target trsvcid: e.g., a port number')
    p.add_argument('-n', '--subnqn', help='NVMe-oF target subnqn')
    p.set_defaults(func=construct_nvme_bdev)

    @call_cmd
    def construct_rbd_bdev(args):
        print_array(rpc.bdev.construct_rbd_bdev(args.client,
                                                name=args.name,
                                                pool_name=args.pool_name,
                                                rbd_name=args.rbd_name,
                                                block_size=args.block_size))

    p = subparsers.add_parser('construct_rbd_bdev',
                              help='Add a bdev with ceph rbd backend')
    p.add_argument('-b', '--name', help="Name of the bdev", required=False)
    p.add_argument('pool_name', help='rbd pool name')
    p.add_argument('rbd_name', help='rbd image name')
    p.add_argument('block_size', help='rbd block size', type=int)
    p.set_defaults(func=construct_rbd_bdev)

    @call_cmd
    def construct_error_bdev(args):
        rpc.bdev.construct_error_bdev(args.client,
                                      base_name=args.base_name)

    p = subparsers.add_parser('construct_error_bdev',
                              help='Add bdev with error injection backend')
    p.add_argument('base_name', help='base bdev name')
    p.set_defaults(func=construct_error_bdev)

    @call_cmd
    def construct_iscsi_bdev(args):
        rpc.bdev.construct_iscsi_bdev(args.client,
                                      name=args.name,
                                      url=args.url,
                                      initiator_iqn=args.initiator_iqn)

    p = subparsers.add_parser('construct_iscsi_bdev',
                              help='Add bdev with iSCSI initiator backend')
    p.add_argument('-b', '--name', help="Name of the bdev", required=True)
    p.add_argument('-i', '--initiator-iqn', help="Initiator IQN", required=True)
    p.add_argument('--url', help="iSCSI Lun URL", required=True)
    p.set_defaults(func=construct_iscsi_bdev)

    @call_cmd
    def construct_pmem_bdev(args):
        print_array(rpc.bdev.construct_pmem_bdev(args.client,
                                                 pmem_file=args.pmem_file,
                                                 name=args.name))

    p = subparsers.add_parser('construct_pmem_bdev', help='Add a bdev with pmem backend')
    p.add_argument('pmem_file', help='Path to pmemblk pool file')
    p.add_argument('-n', '--name', help='Block device name', required=True)
    p.set_defaults(func=construct_pmem_bdev)

    @call_cmd
    def construct_passthru_bdev(args):
        print_array(rpc.bdev.construct_passthru_bdev(args.client,
                                                     base_bdev_name=args.base_bdev_name,
                                                     passthru_bdev_name=args.passthru_bdev_name))

    p = subparsers.add_parser('construct_passthru_bdev',
                              help='Add a pass through bdev on existing bdev')
    p.add_argument('-b', '--base-bdev-name', help="Name of the existing bdev", required=True)
    p.add_argument('-p', '--passthru-bdev-name', help="Name of the passthru bdev", required=True)
    p.set_defaults(func=construct_passthru_bdev)

    @call_cmd
    def get_bdevs(args):
        print_dict(rpc.bdev.get_bdevs(args.client,
                                      name=args.name))

    p = subparsers.add_parser(
        'get_bdevs', help='Display current blockdev list or required blockdev')
    p.add_argument('-b', '--name', help="Name of the Blockdev. Example: Nvme0n1", required=False)
    p.set_defaults(func=get_bdevs)

    @call_cmd
    def get_bdevs_config(args):
        print_dict(rpc.bdev.get_bdevs_config(args.client,
                                             name=args.name))

    p = subparsers.add_parser(
        'get_bdevs_config', help='Display current (live) blockdev configuration list or required blockdev')
    p.add_argument('-b', '--name', help="Name of the Blockdev. Example: Nvme0n1", required=False)
    p.set_defaults(func=get_bdevs_config)

    @call_cmd
    def get_bdevs_iostat(args):
        print_dict(rpc.bdev.get_bdevs_iostat(args.client,
                                             name=args.name))

    p = subparsers.add_parser(
        'get_bdevs_iostat', help='Display current I/O statistics of all the blockdevs or required blockdev.')
    p.add_argument('-b', '--name', help="Name of the Blockdev. Example: Nvme0n1", required=False)
    p.set_defaults(func=get_bdevs_iostat)

    @call_cmd
    def delete_bdev(args):
        rpc.bdev.delete_bdev(args.client,
                             bdev_name=args.bdev_name)

    p = subparsers.add_parser('delete_bdev', help='Delete a blockdev')
    p.add_argument(
        'bdev_name', help='Blockdev name to be deleted. Example: Malloc0.')
    p.set_defaults(func=delete_bdev)

    @call_cmd
    def set_bdev_qos_limit_iops(args):
        rpc.bdev.set_bdev_qos_limit_iops(args.client,
                                         name=args.name,
                                         ios_per_sec=args.ios_per_sec)

    p = subparsers.add_parser('set_bdev_qos_limit_iops', help='Set QoS IOPS limit on a blockdev')
    p.add_argument('name', help='Blockdev name to set QoS. Example: Malloc0')
    p.add_argument('ios_per_sec',
                   help='IOs per second limit (>=10000, example: 20000). 0 means unlimited.', type=int)
    p.set_defaults(func=set_bdev_qos_limit_iops)

    @call_cmd
    def bdev_inject_error(args):
        rpc.bdev.bdev_inject_error(args.client,
                                   name=args.name,
                                   io_type=args.io_type,
                                   error_type=args.error_type,
                                   num=args.num)

    p = subparsers.add_parser('bdev_inject_error', help='bdev inject error')
    p.add_argument('name', help="""the name of the error injection bdev""")
    p.add_argument('io_type', help="""io_type: 'clear' 'read' 'write' 'unmap' 'flush' 'all'""")
    p.add_argument('error_type', help="""error_type: 'failure' 'pending'""")
    p.add_argument(
        '-n', '--num', help='the number of commands you want to fail', type=int, default=1)
    p.set_defaults(func=bdev_inject_error)

    @call_cmd
    def apply_firmware(args):
        print_dict(rpc.bdev.apply_firmware(args.client,
                                           bdev_name=args.bdev_name,
                                           filename=args.filename))

    p = subparsers.add_parser('apply_firmware', help='Download and commit firmware to NVMe device')
    p.add_argument('filename', help='filename of the firmware to download')
    p.add_argument('bdev_name', help='name of the NVMe device')
    p.set_defaults(func=apply_firmware)

    # iSCSI
    def set_iscsi_options(args):
        rpc.iscsi.set_iscsi_options(args.client, args)

    p = subparsers.add_parser('set_iscsi_options', help="""Set options of iSCSI subsystem""")
    p.add_argument('-f', '--auth-file', help='Path to CHAP shared secret file for discovery session')
    p.add_argument('-b', '--node-base', help='Prefix of the name of iSCSI target node')
    p.add_argument('-o', '--nop-timeout', help='Timeout in seconds to nop-in request to the initiator', type=int)
    p.add_argument('-n', '--nop-in-interval', help='Time interval in secs between nop-in requests by the target', type=int)
    p.add_argument('-d', '--no-discovery-auth', help="""CHAP for discovery session should be disabled.
    *** Mutually exclusive with --req-discovery-auth""", action='store_true')
    p.add_argument('-r', '--req-discovery-auth', help="""CHAP for discovery session should be required.
    *** Mutually exclusive with --no-discovery-auth""", action='store_true')
    p.add_argument('-m', '--req-discovery-auth-mutual', help='CHAP for discovery session should be mutual', action='store_true')
    p.add_argument('-g', '--discovery-auth-group', help="""Authentication group ID for discovery session.
    *** Authentication group must be precreated ***""", type=int)
    p.add_argument('-a', '--max-sessions', help='Maximum number of sessions in the host.', type=int)
    p.add_argument('-c', '--max-connections-per-session', help='Negotiated parameter, MaxConnections.', type=int)
    p.add_argument('-w', '--default-time2wait', help='Negotiated parameter, DefaultTime2Wait.', type=int)
    p.add_argument('-v', '--default-time2retain', help='Negotiated parameter, DefaultTime2Retain.', type=int)
    p.add_argument('-i', '--immediate-data', help='Negotiated parameter, ImmediateData.', action='store_true')
    p.add_argument('-l', '--error-recovery-level', help='Negotiated parameter, ErrorRecoveryLevel', type=int)
    p.add_argument('-p', '--allow-duplicated-isid', help='Allow duplicated initiator session ID.', action='store_true')
    p.add_argument('-u', '--min-connections-per-session', help='Allocation unit of connections per core', type=int)
    p.set_defaults(func=set_iscsi_options)

    @call_cmd
    def get_portal_groups(args):
        print_dict(rpc.iscsi.get_portal_groups(args.client, args))

    p = subparsers.add_parser(
        'get_portal_groups', help='Display current portal group configuration')
    p.set_defaults(func=get_portal_groups)

    @call_cmd
    def get_initiator_groups(args):
        print_dict(rpc.iscsi.get_initiator_groups(args.client, args))

    p = subparsers.add_parser('get_initiator_groups',
                              help='Display current initiator group configuration')
    p.set_defaults(func=get_initiator_groups)

    @call_cmd
    def get_target_nodes(args):
        print_dict(rpc.iscsi.get_target_nodes(args.client, args))

    p = subparsers.add_parser('get_target_nodes', help='Display target nodes')
    p.set_defaults(func=get_target_nodes)

    @call_cmd
    def construct_target_node(args):
        rpc.iscsi.construct_target_node(args.client, args)

    p = subparsers.add_parser('construct_target_node',
                              help='Add a target node')
    p.add_argument('name', help='Target node name (ASCII)')
    p.add_argument('alias_name', help='Target node alias name (ASCII)')
    p.add_argument('bdev_name_id_pairs', help="""Whitespace-separated list of <bdev name:LUN ID> pairs enclosed
    in quotes.  Format:  'bdev_name0:id0 bdev_name1:id1' etc
    Example: 'Malloc0:0 Malloc1:1 Malloc5:2'
    *** The bdevs must pre-exist ***
    *** LUN0 (id = 0) is required ***
    *** bdevs names cannot contain space or colon characters ***""")
    p.add_argument('pg_ig_mappings', help="""List of (Portal_Group_Tag:Initiator_Group_Tag) mappings
    Whitespace separated, quoted, mapping defined with colon
    separated list of "tags" (int > 0)
    Example: '1:1 2:2 2:1'
    *** The Portal/Initiator Groups must be precreated ***""")
    p.add_argument('queue_depth', help='Desired target queue depth', type=int)
    p.add_argument('-g', '--chap-group', help="""Authentication group ID for this target node.
    *** Authentication group must be precreated ***""", type=int, default=0)
    p.add_argument('-d', '--disable-chap', help="""CHAP authentication should be disabled for this target node.
    *** Mutually exclusive with --require-chap ***""", action='store_true')
    p.add_argument('-r', '--require-chap', help="""CHAP authentication should be required for this target node.
    *** Mutually exclusive with --disable-chap ***""", action='store_true')
    p.add_argument(
        '-m', '--mutual-chap', help='CHAP authentication should be mutual/bidirectional.', action='store_true')
    p.add_argument('-H', '--header-digest',
                   help='Header Digest should be required for this target node.', action='store_true')
    p.add_argument('-D', '--data-digest',
                   help='Data Digest should be required for this target node.', action='store_true')
    p.set_defaults(func=construct_target_node)

    @call_cmd
    def target_node_add_lun(args):
        rpc.iscsi.target_node_add_lun(args.client, args)

    p = subparsers.add_parser('target_node_add_lun', help='Add LUN to the target node')
    p.add_argument('name', help='Target node name (ASCII)')
    p.add_argument('bdev_name', help="""bdev name enclosed in quotes.
    *** bdev name cannot contain space or colon characters ***""")
    p.add_argument('-i', dest='lun_id', help="""LUN ID (integer >= 0)
    *** If LUN ID is omitted or -1, the lowest free one is assigned ***""", type=int, required=False)
    p.set_defaults(func=target_node_add_lun)

    @call_cmd
    def add_pg_ig_maps(args):
        rpc.iscsi.add_pg_ig_maps(args.client, args)

    p = subparsers.add_parser('add_pg_ig_maps', help='Add PG-IG maps to the target node')
    p.add_argument('name', help='Target node name (ASCII)')
    p.add_argument('pg_ig_mappings', help="""List of (Portal_Group_Tag:Initiator_Group_Tag) mappings
    Whitespace separated, quoted, mapping defined with colon
    separated list of "tags" (int > 0)
    Example: '1:1 2:2 2:1'
    *** The Portal/Initiator Groups must be precreated ***""")
    p.set_defaults(func=add_pg_ig_maps)

    @call_cmd
    def delete_pg_ig_maps(args):
        rpc.iscsi.delete_pg_ig_maps(args.client, args)

    p = subparsers.add_parser('delete_pg_ig_maps', help='Delete PG-IG maps from the target node')
    p.add_argument('name', help='Target node name (ASCII)')
    p.add_argument('pg_ig_mappings', help="""List of (Portal_Group_Tag:Initiator_Group_Tag) mappings
    Whitespace separated, quoted, mapping defined with colon
    separated list of "tags" (int > 0)
    Example: '1:1 2:2 2:1'
    *** The Portal/Initiator Groups must be precreated ***""")
    p.set_defaults(func=delete_pg_ig_maps)

    @call_cmd
    def add_portal_group(args):
        rpc.iscsi.add_portal_group(args.client, args)

    p = subparsers.add_parser('add_portal_group', help='Add a portal group')
    p.add_argument(
        'tag', help='Portal group tag (unique, integer > 0)', type=int)
    p.add_argument('portal_list', nargs=argparse.REMAINDER, help="""List of portals in 'host:port@cpumask' format, separated by whitespace
    (cpumask is optional and can be skipped)
    Example: '192.168.100.100:3260' '192.168.100.100:3261' '192.168.100.100:3262@0x1""")
    p.set_defaults(func=add_portal_group)

    @call_cmd
    def add_initiator_group(args):
        rpc.iscsi.add_initiator_group(args.client, args)

    p = subparsers.add_parser('add_initiator_group',
                              help='Add an initiator group')
    p.add_argument(
        'tag', help='Initiator group tag (unique, integer > 0)', type=int)
    p.add_argument('initiator_list', help="""Whitespace-separated list of initiator hostnames or IP addresses,
    enclosed in quotes.  Example: 'ANY' or '127.0.0.1 192.168.200.100'""")
    p.add_argument('netmask_list', help="""Whitespace-separated list of initiator netmasks enclosed in quotes.
    Example: '255.255.0.0 255.248.0.0' etc""")
    p.set_defaults(func=add_initiator_group)

    @call_cmd
    def add_initiators_to_initiator_group(args):
        rpc.iscsi.add_initiators_to_initiator_group(args.client, args)

    p = subparsers.add_parser('add_initiators_to_initiator_group',
                              help='Add initiators to an existing initiator group')
    p.add_argument(
        'tag', help='Initiator group tag (unique, integer > 0)', type=int)
    p.add_argument('-n', dest='initiator_list', help="""Whitespace-separated list of initiator hostnames or IP addresses,
    enclosed in quotes.  This parameter can be omitted.  Example: 'ANY' or '127.0.0.1 192.168.200.100'""", required=False)
    p.add_argument('-m', dest='netmask_list', help="""Whitespace-separated list of initiator netmasks enclosed in quotes.
    This parameter can be omitted.  Example: '255.255.0.0 255.248.0.0' etc""", required=False)
    p.set_defaults(func=add_initiators_to_initiator_group)

    @call_cmd
    def delete_initiators_from_initiator_group(args):
        rpc.iscsi.delete_initiators_from_initiator_group(args.client, args)

    p = subparsers.add_parser('delete_initiators_from_initiator_group',
                              help='Delete initiators from an existing initiator group')
    p.add_argument(
        'tag', help='Initiator group tag (unique, integer > 0)', type=int)
    p.add_argument('-n', dest='initiator_list', help="""Whitespace-separated list of initiator hostnames or IP addresses,
    enclosed in quotes.  This parameter can be omitted.  Example: 'ANY' or '127.0.0.1 192.168.200.100'""", required=False)
    p.add_argument('-m', dest='netmask_list', help="""Whitespace-separated list of initiator netmasks enclosed in quotes.
    This parameter can be omitted.  Example: '255.255.0.0 255.248.0.0' etc""", required=False)
    p.set_defaults(func=delete_initiators_from_initiator_group)

    @call_cmd
    def delete_target_node(args):
        rpc.iscsi.delete_target_node(args.client, args)

    p = subparsers.add_parser('delete_target_node',
                              help='Delete a target node')
    p.add_argument('target_node_name',
                   help='Target node name to be deleted. Example: iqn.2016-06.io.spdk:disk1.')
    p.set_defaults(func=delete_target_node)

    @call_cmd
    def delete_portal_group(args):
        rpc.iscsi.delete_portal_group(args.client, args)

    p = subparsers.add_parser('delete_portal_group',
                              help='Delete a portal group')
    p.add_argument(
        'tag', help='Portal group tag (unique, integer > 0)', type=int)
    p.set_defaults(func=delete_portal_group)

    @call_cmd
    def delete_initiator_group(args):
        rpc.iscsi.delete_initiator_group(args.client, args)

    p = subparsers.add_parser('delete_initiator_group',
                              help='Delete an initiator group')
    p.add_argument(
        'tag', help='Initiator group tag (unique, integer > 0)', type=int)
    p.set_defaults(func=delete_initiator_group)

    @call_cmd
    def get_iscsi_connections(args):
        print_dict(rpc.iscsi.get_iscsi_connections(args.client, args))

    p = subparsers.add_parser('get_iscsi_connections',
                              help='Display iSCSI connections')
    p.set_defaults(func=get_iscsi_connections)

    @call_cmd
    def get_iscsi_global_params(args):
        print_dict(rpc.iscsi.get_iscsi_global_params(args.client, args))

    p = subparsers.add_parser('get_iscsi_global_params', help='Display iSCSI global parameters')
    p.set_defaults(func=get_iscsi_global_params)

    @call_cmd
    def get_scsi_devices(args):
        print_dict(rpc.iscsi.get_scsi_devices(args.client, args))

    p = subparsers.add_parser('get_scsi_devices', help='Display SCSI devices')
    p.set_defaults(func=get_scsi_devices)

    # log
    @call_cmd
    def set_trace_flag(args):
        rpc.log.set_trace_flag(args.client, args)

    p = subparsers.add_parser('set_trace_flag', help='set trace flag')
    p.add_argument(
        'flag', help='trace mask we want to set. (for example "nvme").')
    p.set_defaults(func=set_trace_flag)

    @call_cmd
    def clear_trace_flag(args):
        rpc.log.clear_trace_flag(args.client, args)

    p = subparsers.add_parser('clear_trace_flag', help='clear trace flag')
    p.add_argument(
        'flag', help='trace mask we want to clear. (for example "nvme").')
    p.set_defaults(func=clear_trace_flag)

    @call_cmd
    def get_trace_flags(args):
        print_dict(rpc.log.get_trace_flags(args.client, args))

    p = subparsers.add_parser('get_trace_flags', help='get trace flags')
    p.set_defaults(func=get_trace_flags)

    @call_cmd
    def set_log_level(args):
        rpc.log.set_log_level(args.client, args)

    p = subparsers.add_parser('set_log_level', help='set log level')
    p.add_argument('level', help='log level we want to set. (for example "DEBUG").')
    p.set_defaults(func=set_log_level)

    @call_cmd
    def get_log_level(args):
        print_dict(rpc.log.get_log_level(args.client, args))

    p = subparsers.add_parser('get_log_level', help='get log level')
    p.set_defaults(func=get_log_level)

    @call_cmd
    def set_log_print_level(args):
        rpc.log.set_log_print_level(args.client, args)

    p = subparsers.add_parser('set_log_print_level', help='set log print level')
    p.add_argument('level', help='log print level we want to set. (for example "DEBUG").')
    p.set_defaults(func=set_log_print_level)

    @call_cmd
    def get_log_print_level(args):
        print_dict(rpc.log.get_log_print_level(args.client, args))

    p = subparsers.add_parser('get_log_print_level', help='get log print level')
    p.set_defaults(func=get_log_print_level)

    # lvol
    @call_cmd
    def construct_lvol_store(args):
        print_array(rpc.lvol.construct_lvol_store(args.client,
                                                  bdev_name=args.bdev_name,
                                                  lvs_name=args.lvs_name,
                                                  cluster_sz=args.cluster_sz))

    p = subparsers.add_parser('construct_lvol_store', help='Add logical volume store on base bdev')
    p.add_argument('bdev_name', help='base bdev name')
    p.add_argument('lvs_name', help='name for lvol store')
    p.add_argument('-c', '--cluster-sz', help='size of cluster (in bytes)', type=int, required=False)
    p.set_defaults(func=construct_lvol_store)

    @call_cmd
    def rename_lvol_store(args):
        rpc.lvol.rename_lvol_store(args.client,
                                   old_name=args.old_name,
                                   new_name=args.new_name)

    p = subparsers.add_parser('rename_lvol_store', help='Change logical volume store name')
    p.add_argument('old_name', help='old name')
    p.add_argument('new_name', help='new name')
    p.set_defaults(func=rename_lvol_store)

    @call_cmd
    def construct_lvol_bdev(args):
        print_array(rpc.lvol.construct_lvol_bdev(args.client,
                                                 lvol_name=args.lvol_name,
                                                 size=args.size * 1024 * 1024,
                                                 thin_provision=args.thin_provision,
                                                 uuid=args.uuid,
                                                 lvs_name=args.lvs_name))

    p = subparsers.add_parser('construct_lvol_bdev', help='Add a bdev with an logical volume backend')
    p.add_argument('-u', '--uuid', help='lvol store UUID', required=False)
    p.add_argument('-l', '--lvs-name', help='lvol store name', required=False)
    p.add_argument('-t', '--thin-provision', action='store_true', help='create lvol bdev as thin provisioned')
    p.add_argument('lvol_name', help='name for this lvol')
    p.add_argument('size', help='size in MiB for this bdev', type=int)
    p.set_defaults(func=construct_lvol_bdev)

    @call_cmd
    def snapshot_lvol_bdev(args):
        rpc.lvol.snapshot_lvol_bdev(args.client,
                                    lvol_name=args.lvol_name,
                                    snapshot_name=args.snapshot_name)

    p = subparsers.add_parser('snapshot_lvol_bdev', help='Create a snapshot of an lvol bdev')
    p.add_argument('lvol_name', help='lvol bdev name')
    p.add_argument('snapshot_name', help='lvol snapshot name')
    p.set_defaults(func=snapshot_lvol_bdev)

    @call_cmd
    def clone_lvol_bdev(args):
        rpc.lvol.clone_lvol_bdev(args.client,
                                 snapshot_name=args.snapshot_name,
                                 clone_name=args.clone_name)

    p = subparsers.add_parser('clone_lvol_bdev', help='Create a clone of an lvol snapshot')
    p.add_argument('snapshot_name', help='lvol snapshot name')
    p.add_argument('clone_name', help='lvol clone name')
    p.set_defaults(func=clone_lvol_bdev)

    @call_cmd
    def rename_lvol_bdev(args):
        rpc.lvol.rename_lvol_bdev(args.client,
                                  old_name=args.old_name,
                                  new_name=args.new_name)

    p = subparsers.add_parser('rename_lvol_bdev', help='Change lvol bdev name')
    p.add_argument('old_name', help='lvol bdev name')
    p.add_argument('new_name', help='new lvol name')
    p.set_defaults(func=rename_lvol_bdev)

    @call_cmd
    def inflate_lvol_bdev(args):
        rpc.lvol.inflate_lvol_bdev(args.client,
                                   name=args.name)

    p = subparsers.add_parser('inflate_lvol_bdev', help='Make thin provisioned lvol a thick provisioned lvol')
    p.add_argument('name', help='lvol bdev name')
    p.set_defaults(func=inflate_lvol_bdev)

    @call_cmd
    def resize_lvol_bdev(args):
        rpc.lvol.resize_lvol_bdev(args.client,
                                  name=args.name,
                                  size=args.size * 1024 * 1024)

    p = subparsers.add_parser('resize_lvol_bdev', help='Resize existing lvol bdev')
    p.add_argument('name', help='lvol bdev name')
    p.add_argument('size', help='new size in MiB for this bdev', type=int)
    p.set_defaults(func=resize_lvol_bdev)

    @call_cmd
    def destroy_lvol_bdev(args):
        rpc.lvol.destroy_lvol_bdev(args.client,
                                   name=args.name)

    p = subparsers.add_parser('destroy_lvol_bdev', help='Destroy a logical volume')
    p.add_argument('name', help='lvol bdev name')
    p.set_defaults(func=destroy_lvol_bdev)

    @call_cmd
    def destroy_lvol_store(args):
        rpc.lvol.destroy_lvol_store(args.client,
                                    uuid=args.uuid,
                                    lvs_name=args.lvs_name)

    p = subparsers.add_parser('destroy_lvol_store', help='Destroy an logical volume store')
    p.add_argument('-u', '--uuid', help='lvol store UUID', required=False)
    p.add_argument('-l', '--lvs-name', help='lvol store name', required=False)
    p.set_defaults(func=destroy_lvol_store)

    @call_cmd
    def get_lvol_stores(args):
        print_dict(rpc.lvol.get_lvol_stores(args.client,
                                            uuid=args.uuid,
                                            lvs_name=args.lvs_name))

    p = subparsers.add_parser('get_lvol_stores', help='Display current logical volume store list')
    p.add_argument('-u', '--uuid', help='lvol store UUID', required=False)
    p.add_argument('-l', '--lvs-name', help='lvol store name', required=False)
    p.set_defaults(func=get_lvol_stores)

    # split
    @call_cmd
    def construct_split_vbdev(args):
        print_dict(rpc.bdev.construct_split_vbdev(args.client,
                                                  base_bdev=args.base_bdev,
                                                  split_count=args.split_count,
                                                  split_size_mb=args.split_size_mb))

    p = subparsers.add_parser('construct_split_vbdev', help="""Add given disk name to split config. If bdev with base_name
    name exist the split bdevs will be created right away, if not split bdevs will be created when base bdev became
    available (during examination process).""")
    p.add_argument('base_bdev', help='base bdev name')
    p.add_argument('-s', '--split-size-mb', help='size in MiB for each bdev', type=int, default=0)
    p.add_argument('split_count', help="""Optional - number of split bdevs to create. Total size * split_count must not
    exceed the base bdev size.""", type=int)
    p.set_defaults(func=construct_split_vbdev)

    @call_cmd
    def destruct_split_vbdev(args):
        rpc.bdev.destruct_split_vbdev(args.client,
                                      base_bdev=args.base_bdev)

    p = subparsers.add_parser('destruct_split_vbdev', help="""Delete split config with all created splits.""")
    p.add_argument('base_bdev', help='base bdev name')
    p.set_defaults(func=destruct_split_vbdev)

    # nbd
    @call_cmd
    def start_nbd_disk(args):
        print(rpc.nbd.start_nbd_disk(args.client,
                                     bdev_name=args.bdev_name,
                                     nbd_device=args.nbd_device))

    p = subparsers.add_parser('start_nbd_disk', help='Export a bdev as a nbd disk')
    p.add_argument('bdev_name', help='Blockdev name to be exported. Example: Malloc0.')
    p.add_argument('nbd_device', help='Nbd device name to be assigned. Example: /dev/nbd0.')
    p.set_defaults(func=start_nbd_disk)

    @call_cmd
    def stop_nbd_disk(args):
        rpc.nbd.stop_nbd_disk(args.client,
                              nbd_device=args.nbd_device)

    p = subparsers.add_parser('stop_nbd_disk', help='Stop a nbd disk')
    p.add_argument('nbd_device', help='Nbd device name to be stopped. Example: /dev/nbd0.')
    p.set_defaults(func=stop_nbd_disk)

    @call_cmd
    def get_nbd_disks(args):
        print_dict(rpc.nbd.get_nbd_disks(args.client,
                                         nbd_device=args.nbd_device))

    p = subparsers.add_parser('get_nbd_disks', help='Display full or specified nbd device list')
    p.add_argument('-n', '--nbd-device', help="Path of the nbd device. Example: /dev/nbd0", required=False)
    p.set_defaults(func=get_nbd_disks)

    # net
    @call_cmd
    def add_ip_address(args):
        rpc.net.add_ip_address(args.client, args)

    p = subparsers.add_parser('add_ip_address', help='Add IP address')
    p.add_argument('ifc_index', help='ifc index of the nic device.', type=int)
    p.add_argument('ip_addr', help='ip address will be added.')
    p.set_defaults(func=add_ip_address)

    @call_cmd
    def delete_ip_address(args):
        rpc.net.delete_ip_address(args.client, args)

    p = subparsers.add_parser('delete_ip_address', help='Delete IP address')
    p.add_argument('ifc_index', help='ifc index of the nic device.', type=int)
    p.add_argument('ip_addr', help='ip address will be deleted.')
    p.set_defaults(func=delete_ip_address)

    @call_cmd
    def get_interfaces(args):
        print_dict(rpc.net.get_interfaces(args.client, args))

    p = subparsers.add_parser(
        'get_interfaces', help='Display current interface list')
    p.set_defaults(func=get_interfaces)

    # NVMe-oF
    @call_cmd
    def set_nvmf_target_options(args):
        rpc.nvmf.set_nvmf_target_options(args.client,
                                         max_queue_depth=args.max_queue_depth,
                                         max_qpairs_per_ctrlr=args.max_qpairs_per_ctrlr,
                                         in_capsule_data_size=args.in_capsule_data_size,
                                         max_io_size=args.max_io_size,
                                         max_subsystems=args.max_subsystems,
                                         io_unit_size=args.io_unit_size)

    p = subparsers.add_parser('set_nvmf_target_options', help='Set NVMf target options')
    p.add_argument('-q', '--max-queue-depth', help='Max number of outstanding I/O per queue', type=int)
    p.add_argument('-p', '--max-qpairs-per-ctrlr', help='Max number of SQ and CQ per controller', type=int)
    p.add_argument('-c', '--in-capsule-data-size', help='Max number of in-capsule data size', type=int)
    p.add_argument('-i', '--max-io-size', help='Max I/O size', type=int)
    p.add_argument('-x', '--max-subsystems', help='Max number of NVMf subsystems', type=int)
    p.add_argument('-u', '--io-unit-size', help='I/O unit size', type=int)
    p.set_defaults(func=set_nvmf_target_options)

    @call_cmd
    def set_nvmf_target_config(args):
        rpc.nvmf.set_nvmf_target_config(args.client,
                                        acceptor_poll_rate=args.acceptor_poll_rate)

    p = subparsers.add_parser('set_nvmf_target_config', help='Set NVMf target config')
    p.add_argument('-r', '--acceptor-poll-rate', help='How often the acceptor polls for incoming connections', type=int)
    p.set_defaults(func=set_nvmf_target_config)

    @call_cmd
    def get_nvmf_subsystems(args):
        print_dict(rpc.nvmf.get_nvmf_subsystems(args.client))

    p = subparsers.add_parser('get_nvmf_subsystems',
                              help='Display nvmf subsystems')
    p.set_defaults(func=get_nvmf_subsystems)

    @call_cmd
    def construct_nvmf_subsystem(args):
        listen_addresses = None
        hosts = None
        namespaces = None
        if args.listen:
            listen_addresses = [
                dict(
                    u.split(
                        ":",
                        1) for u in a.split(" ")) for a in args.listen.split(",")]

        if args.hosts:
            hosts = []
            for u in args.hosts.strip().split(" "):
                hosts.append(u)

        if args.namespaces:
            namespaces = []
            for u in args.namespaces.strip().split(" "):
                bdev_name = u
                nsid = 0
                if ':' in u:
                    (bdev_name, nsid) = u.split(":")

                ns_params = {'bdev_name': bdev_name}

                nsid = int(nsid)
                if nsid != 0:
                    ns_params['nsid'] = nsid

                namespaces.append(ns_params)

        rpc.nvmf.construct_nvmf_subsystem(args.client,
                                          nqn=args.nqn,
                                          listen_addresses=listen_addresses,
                                          hosts=hosts,
                                          allow_any_host=args.allow_any_host,
                                          serial_number=args.serial_number,
                                          namespaces=namespaces,
                                          max_namespaces=args.max_namespaces)

    p = subparsers.add_parser('construct_nvmf_subsystem', help='Add a nvmf subsystem')
    p.add_argument('nqn', help='Target nqn(ASCII)')
    p.add_argument('listen', help="""comma-separated list of Listen <trtype:transport_name traddr:address trsvcid:port_id> pairs enclosed
    in quotes.  Format:  'trtype:transport0 traddr:traddr0 trsvcid:trsvcid0,trtype:transport1 traddr:traddr1 trsvcid:trsvcid1' etc
    Example: 'trtype:RDMA traddr:192.168.100.8 trsvcid:4420,trtype:RDMA traddr:192.168.100.9 trsvcid:4420'""")
    p.add_argument('hosts', help="""Whitespace-separated list of host nqn list.
    Format:  'nqn1 nqn2' etc
    Example: 'nqn.2016-06.io.spdk:init nqn.2016-07.io.spdk:init'""")
    p.add_argument("-a", "--allow-any-host", action='store_true', help="Allow any host to connect (don't enforce host NQN whitelist)")
    p.add_argument("-s", "--serial-number", help="""
    Format:  'sn' etc
    Example: 'SPDK00000000000001'""", default='0000:00:01.0')
    p.add_argument("-n", "--namespaces", help="""Whitespace-separated list of namespaces
    Format:  'bdev_name1[:nsid1] bdev_name2[:nsid2] bdev_name3[:nsid3]' etc
    Example: '1:Malloc0 2:Malloc1 3:Malloc2'
    *** The devices must pre-exist ***""")
    p.add_argument("-m", "--max-namespaces", help="Maximum number of namespaces allowed to added during active connection",
                   type=int, default=0)
    p.set_defaults(func=construct_nvmf_subsystem)

    @call_cmd
    def delete_nvmf_subsystem(args):
        rpc.nvmf.delete_nvmf_subsystem(args.client,
                                       nqn=args.subsystem_nqn)

    p = subparsers.add_parser('delete_nvmf_subsystem',
                              help='Delete a nvmf subsystem')
    p.add_argument('subsystem_nqn',
                   help='subsystem nqn to be deleted. Example: nqn.2016-06.io.spdk:cnode1.')
    p.set_defaults(func=delete_nvmf_subsystem)

    @call_cmd
    def nvmf_subsystem_add_listener(args):
        rpc.nvmf.nvmf_subsystem_add_listener(args.client,
                                             nqn=args.nqn,
                                             trtype=args.trtype,
                                             traddr=args.traddr,
                                             adrfam=args.adrfam,
                                             trsvcid=args.trsvcid)

    p = subparsers.add_parser('nvmf_subsystem_add_listener', help='Add a listener to an NVMe-oF subsystem')
    p.add_argument('nqn', help='NVMe-oF subsystem NQN')
    p.add_argument('-t', '--trtype', help='NVMe-oF transport type: e.g., rdma', required=True)
    p.add_argument('-a', '--traddr', help='NVMe-oF transport address: e.g., an ip address', required=True)
    p.add_argument('-f', '--adrfam', help='NVMe-oF transport adrfam: e.g., ipv4, ipv6, ib, fc, intra_host')
    p.add_argument('-s', '--trsvcid', help='NVMe-oF transport service id: e.g., a port number')
    p.set_defaults(func=nvmf_subsystem_add_listener)

    @call_cmd
    def nvmf_subsystem_remove_listener(args):
        rpc.nvmf.nvmf_subsystem_remove_listener(args.client,
                                                nqn=args.nqn,
                                                trtype=args.trtype,
                                                traddr=args.traddr,
                                                adrfam=args.adrfam,
                                                trsvcid=args.trsvcid)

    p = subparsers.add_parser('nvmf_subsystem_remove_listener', help='Remove a listener from an NVMe-oF subsystem')
    p.add_argument('nqn', help='NVMe-oF subsystem NQN')
    p.add_argument('-t', '--trtype', help='NVMe-oF transport type: e.g., rdma', required=True)
    p.add_argument('-a', '--traddr', help='NVMe-oF transport address: e.g., an ip address', required=True)
    p.add_argument('-f', '--adrfam', help='NVMe-oF transport adrfam: e.g., ipv4, ipv6, ib, fc, intra_host')
    p.add_argument('-s', '--trsvcid', help='NVMe-oF transport service id: e.g., a port number')
    p.set_defaults(func=nvmf_subsystem_remove_listener)

    @call_cmd
    def nvmf_subsystem_add_ns(args):
        rpc.nvmf.nvmf_subsystem_add_ns(args.client,
                                       nqn=args.nqn,
                                       bdev_name=args.bdev_name,
                                       nsid=args.nsid,
                                       nguid=args.nguid,
                                       eui64=args.eui64,
                                       uuid=args.uuid)

    p = subparsers.add_parser('nvmf_subsystem_add_ns', help='Add a namespace to an NVMe-oF subsystem')
    p.add_argument('nqn', help='NVMe-oF subsystem NQN')
    p.add_argument('bdev_name', help='The name of the bdev that will back this namespace')
    p.add_argument('-n', '--nsid', help='The requested NSID (optional)', type=int)
    p.add_argument('-g', '--nguid', help='Namespace globally unique identifier (optional)')
    p.add_argument('-e', '--eui64', help='Namespace EUI-64 identifier (optional)')
    p.add_argument('-u', '--uuid', help='Namespace UUID (optional)')
    p.set_defaults(func=nvmf_subsystem_add_ns)

    @call_cmd
    def nvmf_subsystem_remove_ns(args):
        rpc.nvmf.nvmf_subsystem_remove_ns(args.client,
                                          nqn=args.nqn,
                                          nsid=args.nsid)

    p = subparsers.add_parser('nvmf_subsystem_remove_ns', help='Remove a namespace to an NVMe-oF subsystem')
    p.add_argument('nqn', help='NVMe-oF subsystem NQN')
    p.add_argument('nsid', help='The requested NSID', type=int)
    p.set_defaults(func=nvmf_subsystem_remove_ns)

    @call_cmd
    def nvmf_subsystem_add_host(args):
        rpc.nvmf.nvmf_subsystem_add_host(args.client,
                                         nqn=args.nqn,
                                         host=args.host)

    p = subparsers.add_parser('nvmf_subsystem_add_host', help='Add a host to an NVMe-oF subsystem')
    p.add_argument('nqn', help='NVMe-oF subsystem NQN')
    p.add_argument('host', help='Host NQN to allow')
    p.set_defaults(func=nvmf_subsystem_add_host)

    @call_cmd
    def nvmf_subsystem_remove_host(args):
        rpc.nvmf.nvmf_subsystem_remove_host(args.client,
                                            nqn=args.nqn,
                                            host=args.host)

    p = subparsers.add_parser('nvmf_subsystem_remove_host', help='Remove a host from an NVMe-oF subsystem')
    p.add_argument('nqn', help='NVMe-oF subsystem NQN')
    p.add_argument('host', help='Host NQN to remove')
    p.set_defaults(func=nvmf_subsystem_remove_host)

    @call_cmd
    def nvmf_subsystem_allow_any_host(args):
        rpc.nvmf.nvmf_subsystem_allow_any_host(args.client,
                                               nqn=args.nqn,
                                               disable=args.disable)

    p = subparsers.add_parser('nvmf_subsystem_allow_any_host', help='Allow any host to connect to the subsystem')
    p.add_argument('nqn', help='NVMe-oF subsystem NQN')
    p.add_argument('-e', '--enable', action='store_true', help='Enable allowing any host')
    p.add_argument('-d', '--disable', action='store_true', help='Disable allowing any host')
    p.set_defaults(func=nvmf_subsystem_allow_any_host)

    # pmem
    @call_cmd
    def create_pmem_pool(args):
        rpc.pmem.create_pmem_pool(args.client, args)

    p = subparsers.add_parser('create_pmem_pool', help='Create pmem pool')
    p.add_argument('pmem_file', help='Path to pmemblk pool file')
    p.add_argument('total_size', help='Size of malloc bdev in MB (int > 0)', type=int)
    p.add_argument('block_size', help='Block size for this pmem pool', type=int)
    p.set_defaults(func=create_pmem_pool)

    @call_cmd
    def pmem_pool_info(args):
        print_dict(rpc.pmem.pmem_pool_info(args.client, args))

    p = subparsers.add_parser('pmem_pool_info', help='Display pmem pool info and check consistency')
    p.add_argument('pmem_file', help='Path to pmemblk pool file')
    p.set_defaults(func=pmem_pool_info)

    @call_cmd
    def delete_pmem_pool(args):
        rpc.pmem.delete_pmem_pool(args.client, args)

    p = subparsers.add_parser('delete_pmem_pool', help='Delete pmem pool')
    p.add_argument('pmem_file', help='Path to pmemblk pool file')
    p.set_defaults(func=delete_pmem_pool)

    # subsystem
    @call_cmd
    def get_subsystems(args):
        print_dict(rpc.subsystem.get_subsystems(args.client))

    p = subparsers.add_parser('get_subsystems', help="""Print subsystems array in initialization order. Each subsystem
    entry contain (unsorted) array of subsystems it depends on.""")
    p.set_defaults(func=get_subsystems)

    @call_cmd
    def get_subsystem_config(args):
        print_dict(rpc.subsystem.get_subsystem_config(args.client, args.name))

    p = subparsers.add_parser('get_subsystem_config', help="""Print subsystem configuration""")
    p.add_argument('name', help='Name of subsystem to query')
    p.set_defaults(func=get_subsystem_config)

    # vhost
    @call_cmd
    def set_vhost_controller_coalescing(args):
        rpc.vhost.set_vhost_controller_coalescing(args.client, args)

    p = subparsers.add_parser('set_vhost_controller_coalescing', help='Set vhost controller coalescing')
    p.add_argument('ctrlr', help='controller name')
    p.add_argument('delay_base_us', help='Base delay time', type=int)
    p.add_argument('iops_threshold', help='IOPS threshold when coalescing is enabled', type=int)
    p.set_defaults(func=set_vhost_controller_coalescing)

    @call_cmd
    def construct_vhost_scsi_controller(args):
        rpc.vhost.construct_vhost_scsi_controller(args.client, args)

    p = subparsers.add_parser(
        'construct_vhost_scsi_controller', help='Add new vhost controller')
    p.add_argument('ctrlr', help='controller name')
    p.add_argument('--cpumask', help='cpu mask for this controller')
    p.set_defaults(func=construct_vhost_scsi_controller)

    @call_cmd
    def add_vhost_scsi_lun(args):
        rpc.vhost.add_vhost_scsi_lun(args.client, args)

    p = subparsers.add_parser('add_vhost_scsi_lun',
                              help='Add lun to vhost controller')
    p.add_argument('ctrlr', help='conntroller name where add lun')
    p.add_argument('scsi_target_num', help='scsi_target_num', type=int)
    p.add_argument('bdev_name', help='bdev name')
    p.set_defaults(func=add_vhost_scsi_lun)

    @call_cmd
    def remove_vhost_scsi_target(args):
        rpc.vhost.remove_vhost_scsi_target(args.client, args)

    p = subparsers.add_parser('remove_vhost_scsi_target', help='Remove target from vhost controller')
    p.add_argument('ctrlr', help='controller name to remove target from')
    p.add_argument('scsi_target_num', help='scsi_target_num', type=int)
    p.set_defaults(func=remove_vhost_scsi_target)

    @call_cmd
    def construct_vhost_blk_controller(args):
        rpc.vhost.construct_vhost_blk_controller(args.client, args)

    p = subparsers.add_parser('construct_vhost_blk_controller', help='Add a new vhost block controller')
    p.add_argument('ctrlr', help='controller name')
    p.add_argument('dev_name', help='device name')
    p.add_argument('--cpumask', help='cpu mask for this controller')
    p.add_argument("-r", "--readonly", action='store_true', help='Set controller as read-only')
    p.set_defaults(func=construct_vhost_blk_controller)

    @call_cmd
    def construct_vhost_nvme_controller(args):
        rpc.vhost.construct_vhost_nvme_controller(args.client, args)

    p = subparsers.add_parser('construct_vhost_nvme_controller', help='Add new vhost controller')
    p.add_argument('ctrlr', help='controller name')
    p.add_argument('io_queues', help='number of IO queues for the controller', type=int)
    p.add_argument('--cpumask', help='cpu mask for this controller')
    p.set_defaults(func=construct_vhost_nvme_controller)

    @call_cmd
    def add_vhost_nvme_ns(args):
        rpc.vhost.add_vhost_nvme_ns(args.client, args)

    p = subparsers.add_parser('add_vhost_nvme_ns', help='Add a Namespace to vhost controller')
    p.add_argument('ctrlr', help='conntroller name where add a Namespace')
    p.add_argument('bdev_name', help='block device name for a new Namespace')
    p.set_defaults(func=add_vhost_nvme_ns)

    @call_cmd
    def get_vhost_controllers(args):
        print_dict(rpc.vhost.get_vhost_controllers(args.client, args))

    p = subparsers.add_parser('get_vhost_controllers', help='List vhost controllers')
    p.set_defaults(func=get_vhost_controllers)

    @call_cmd
    def remove_vhost_controller(args):
        rpc.vhost.remove_vhost_controller(args.client, args)

    p = subparsers.add_parser('remove_vhost_controller', help='Remove a vhost controller')
    p.add_argument('ctrlr', help='controller name')
    p.set_defaults(func=remove_vhost_controller)

    @call_cmd
    def construct_virtio_dev(args):
        print_dict(rpc.vhost.construct_virtio_dev(args.client, args))

    p = subparsers.add_parser('construct_virtio_dev', help="""Construct new virtio device using provided
    transport type and device type. In case of SCSI device type this implies scan and add bdevs offered by
    remote side. Result is array of added bdevs.""")
    p.add_argument('name', help="Use this name as base for new created bdevs")
    p.add_argument('-t', '--trtype',
                   help='Virtio target transport type: pci or user', required=True)
    p.add_argument('-a', '--traddr',
                   help='Transport type specific target address: e.g. UNIX domain socket path or BDF', required=True)
    p.add_argument('-d', '--dev-type',
                   help='Device type: blk or scsi', required=True)
    p.add_argument('--vq-count', help='Number of virtual queues to be used.', type=int)
    p.add_argument('--vq-size', help='Size of each queue', type=int)
    p.set_defaults(func=construct_virtio_dev)

    @call_cmd
    def construct_virtio_user_scsi_bdev(args):
        print_dict(rpc.vhost.construct_virtio_user_scsi_bdev(args.client, args))

    p = subparsers.add_parser('construct_virtio_user_scsi_bdev', help="""Connect to virtio user scsi device.
    This imply scan and add bdevs offered by remote side.
    Result is array of added bdevs.""")
    p.add_argument('path', help='Path to Virtio SCSI socket')
    p.add_argument('name', help="""Use this name as base instead of 'VirtioScsiN'
    Base will be used to construct new bdev's found on target by adding 't<TARGET_ID>' sufix.""")
    p.add_argument('--vq-count', help='Number of virtual queues to be used.', type=int)
    p.add_argument('--vq-size', help='Size of each queue', type=int)
    p.set_defaults(func=construct_virtio_user_scsi_bdev)

    @call_cmd
    def construct_virtio_pci_scsi_bdev(args):
        print_dict(rpc.vhost.construct_virtio_pci_scsi_bdev(args.client, args))

    p = subparsers.add_parser('construct_virtio_pci_scsi_bdev', help="""Create a Virtio
    SCSI device from a virtio-pci device.""")
    p.add_argument('pci_address', help="""PCI address in domain:bus:device.function format or
    domain.bus.device.function format""")
    p.add_argument('name', help="""Name for the virtio device.
    It will be inhereted by all created bdevs, which are named n the following format: <name>t<target_id>""")
    p.set_defaults(func=construct_virtio_pci_scsi_bdev)

    @call_cmd
    def get_virtio_scsi_devs(args):
        print_dict(rpc.vhost.get_virtio_scsi_devs(args.client, args))

    p = subparsers.add_parser('get_virtio_scsi_devs', help='List all Virtio-SCSI devices.')
    p.set_defaults(func=get_virtio_scsi_devs)

    @call_cmd
    def remove_virtio_scsi_bdev(args):
        rpc.vhost.remove_virtio_scsi_bdev(args.client, args)

    p = subparsers.add_parser('remove_virtio_scsi_bdev', help="""Remove a Virtio-SCSI device
    This will delete all bdevs exposed by this device""")
    p.add_argument('name', help='Virtio device name. E.g. VirtioUser0')
    p.set_defaults(func=remove_virtio_scsi_bdev)

    @call_cmd
    def construct_virtio_user_blk_bdev(args):
        print_dict(rpc.vhost.construct_virtio_user_blk_bdev(args.client, args))

    p = subparsers.add_parser('construct_virtio_user_blk_bdev', help='Connect to a virtio user blk device.')
    p.add_argument('path', help='Path to Virtio BLK socket')
    p.add_argument('name', help='Name for the bdev')
    p.add_argument('--vq-count', help='Number of virtual queues to be used.', type=int)
    p.add_argument('--vq-size', help='Size of each queue', type=int)
    p.set_defaults(func=construct_virtio_user_blk_bdev)

    @call_cmd
    def construct_virtio_pci_blk_bdev(args):
        print_dict(rpc.vhost.construct_virtio_pci_blk_bdev(args.client, args))

    p = subparsers.add_parser('construct_virtio_pci_blk_bdev', help='Create a Virtio Blk device from a virtio-pci device.')
    p.add_argument('pci_address', help="""PCI address in domain:bus:device.function format or
    domain.bus.device.function format""")
    p.add_argument('name', help='Name for the bdev')
    p.set_defaults(func=construct_virtio_pci_blk_bdev)

    # ioat
    @call_cmd
    def scan_ioat_copy_engine(args):
        pci_whitelist = []
        if args.pci_whitelist:
            for w in args.pci_whitelist.strip().split(" "):
                pci_whitelist.append(w)
        rpc.ioat.scan_ioat_copy_engine(args.client, pci_whitelist)

    p = subparsers.add_parser('scan_ioat_copy_engine', help='Set scan and enable IOAT copy engine offload.')
    p.add_argument('-w', '--pci-whitelist', help="""Whitespace-separated list of PCI addresses in
    domain:bus:device.function format or domain.bus.device.function format""")
    p.set_defaults(func=scan_ioat_copy_engine)

    args = parser.parse_args()

    try:
        args.client = rpc.client.JSONRPCClient(args.server_addr, args.port, args.verbose, args.timeout)
    except JSONRPCException as ex:
        print(ex.message)
        exit(1)
    args.func(args)