ceph/src/spdk/dpdk/usertools/dpdk-devbind.py

   1 #! /usr/bin/env python
   2 # SPDX-License-Identifier: BSD-3-Clause
   3 # Copyright(c) 2010-2014 Intel Corporation
   4 #
   5
   6 import sys
   7 import os
   8 import getopt
   9 import subprocess
  10 from os.path import exists, abspath, dirname, basename
  11
  12 # The PCI base class for all devices
  13 network_class = {'Class': '02', 'Vendor': None, 'Device': None,
  14                     'SVendor': None, 'SDevice': None}
  15 encryption_class = {'Class': '10', 'Vendor': None, 'Device': None,
  16                    'SVendor': None, 'SDevice': None}
  17 intel_processor_class = {'Class': '0b', 'Vendor': '8086', 'Device': None,
  18                    'SVendor': None, 'SDevice': None}
  19 cavium_sso = {'Class': '08', 'Vendor': '177d', 'Device': 'a04b,a04d',
  20               'SVendor': None, 'SDevice': None}
  21 cavium_fpa = {'Class': '08', 'Vendor': '177d', 'Device': 'a053',
  22               'SVendor': None, 'SDevice': None}
  23 cavium_pkx = {'Class': '08', 'Vendor': '177d', 'Device': 'a0dd,a049',
  24               'SVendor': None, 'SDevice': None}
  25 cavium_tim = {'Class': '08', 'Vendor': '177d', 'Device': 'a051',
  26               'SVendor': None, 'SDevice': None}
  27 cavium_zip = {'Class': '12', 'Vendor': '177d', 'Device': 'a037',
  28               'SVendor': None, 'SDevice': None}
  29 avp_vnic = {'Class': '05', 'Vendor': '1af4', 'Device': '1110',
  30               'SVendor': None, 'SDevice': None}
  31
  32 network_devices = [network_class, cavium_pkx, avp_vnic]
  33 crypto_devices = [encryption_class, intel_processor_class]
  34 eventdev_devices = [cavium_sso, cavium_tim]
  35 mempool_devices = [cavium_fpa]
  36 compress_devices = [cavium_zip]
  37
  38 # global dict ethernet devices present. Dictionary indexed by PCI address.
  39 # Each device within this is itself a dictionary of device properties
  40 devices = {}
  41 # list of supported DPDK drivers
  42 dpdk_drivers = ["igb_uio", "vfio-pci", "uio_pci_generic"]
  43
  44 # command-line arg flags
  45 b_flag = None
  46 status_flag = False
  47 force_flag = False
  48 args = []
  49
  50
  51 def usage():
  52     '''Print usage information for the program'''
  53     argv0 = basename(sys.argv[0])
  54     print("""
  55 Usage:
  56 ------
  57
  58      %(argv0)s [options] DEVICE1 DEVICE2 ....
  59
  60 where DEVICE1, DEVICE2 etc, are specified via PCI "domain:bus:slot.func" syntax
  61 or "bus:slot.func" syntax. For devices bound to Linux kernel drivers, they may
  62 also be referred to by Linux interface name e.g. eth0, eth1, em0, em1, etc.
  63
  64 Options:
  65     --help, --usage:
  66         Display usage information and quit
  67
  68     -s, --status:
  69         Print the current status of all known network, crypto, event
  70         and mempool devices.
  71         For each device, it displays the PCI domain, bus, slot and function,
  72         along with a text description of the device. Depending upon whether the
  73         device is being used by a kernel driver, the igb_uio driver, or no
  74         driver, other relevant information will be displayed:
  75         * the Linux interface name e.g. if=eth0
  76         * the driver being used e.g. drv=igb_uio
  77         * any suitable drivers not currently using that device
  78             e.g. unused=igb_uio
  79         NOTE: if this flag is passed along with a bind/unbind option, the
  80         status display will always occur after the other operations have taken
  81         place.
  82
  83     --status-dev:
  84         Print the status of given device group. Supported device groups are:
  85         "net", "crypto", "event", "mempool" and "compress"
  86
  87     -b driver, --bind=driver:
  88         Select the driver to use or \"none\" to unbind the device
  89
  90     -u, --unbind:
  91         Unbind a device (Equivalent to \"-b none\")
  92
  93     --force:
  94         By default, network devices which are used by Linux - as indicated by
  95         having routes in the routing table - cannot be modified. Using the
  96         --force flag overrides this behavior, allowing active links to be
  97         forcibly unbound.
  98         WARNING: This can lead to loss of network connection and should be used
  99         with caution.
 100
 101 Examples:
 102 ---------
 103
 104 To display current device status:
 105         %(argv0)s --status
 106
 107 To display current network device status:
 108         %(argv0)s --status-dev net
 109
 110 To bind eth1 from the current driver and move to use igb_uio
 111         %(argv0)s --bind=igb_uio eth1
 112
 113 To unbind 0000:01:00.0 from using any driver
 114         %(argv0)s -u 0000:01:00.0
 115
 116 To bind 0000:02:00.0 and 0000:02:00.1 to the ixgbe kernel driver
 117         %(argv0)s -b ixgbe 02:00.0 02:00.1
 118
 119     """ % locals())  # replace items from local variables
 120
 121
 122 # This is roughly compatible with check_output function in subprocess module
 123 # which is only available in python 2.7.
 124 def check_output(args, stderr=None):
 125     '''Run a command and capture its output'''
 126     return subprocess.Popen(args, stdout=subprocess.PIPE,
 127                             stderr=stderr).communicate()[0]
 128
 129
 130 def check_modules():
 131     '''Checks that igb_uio is loaded'''
 132     global dpdk_drivers
 133
 134     # list of supported modules
 135     mods = [{"Name": driver, "Found": False} for driver in dpdk_drivers]
 136
 137     # first check if module is loaded
 138     try:
 139         # Get list of sysfs modules (both built-in and dynamically loaded)
 140         sysfs_path = '/sys/module/'
 141
 142         # Get the list of directories in sysfs_path
 143         sysfs_mods = [os.path.join(sysfs_path, o) for o
 144                       in os.listdir(sysfs_path)
 145                       if os.path.isdir(os.path.join(sysfs_path, o))]
 146
 147         # Extract the last element of '/sys/module/abc' in the array
 148         sysfs_mods = [a.split('/')[-1] for a in sysfs_mods]
 149
 150         # special case for vfio_pci (module is named vfio-pci,
 151         # but its .ko is named vfio_pci)
 152         sysfs_mods = [a if a != 'vfio_pci' else 'vfio-pci' for a in sysfs_mods]
 153
 154         for mod in mods:
 155             if mod["Name"] in sysfs_mods:
 156                 mod["Found"] = True
 157     except:
 158         pass
 159
 160     # check if we have at least one loaded module
 161     if True not in [mod["Found"] for mod in mods] and b_flag is not None:
 162         if b_flag in dpdk_drivers:
 163             print("Error - no supported modules(DPDK driver) are loaded")
 164             sys.exit(1)
 165         else:
 166             print("Warning - no supported modules(DPDK driver) are loaded")
 167
 168     # change DPDK driver list to only contain drivers that are loaded
 169     dpdk_drivers = [mod["Name"] for mod in mods if mod["Found"]]
 170
 171
 172 def has_driver(dev_id):
 173     '''return true if a device is assigned to a driver. False otherwise'''
 174     return "Driver_str" in devices[dev_id]
 175
 176
 177 def get_pci_device_details(dev_id, probe_lspci):
 178     '''This function gets additional details for a PCI device'''
 179     device = {}
 180
 181     if probe_lspci:
 182         extra_info = check_output(["lspci", "-vmmks", dev_id]).splitlines()
 183
 184         # parse lspci details
 185         for line in extra_info:
 186             if len(line) == 0:
 187                 continue
 188             name, value = line.decode().split("\t", 1)
 189             name = name.strip(":") + "_str"
 190             device[name] = value
 191     # check for a unix interface name
 192     device["Interface"] = ""
 193     for base, dirs, _ in os.walk("/sys/bus/pci/devices/%s/" % dev_id):
 194         if "net" in dirs:
 195             device["Interface"] = \
 196                 ",".join(os.listdir(os.path.join(base, "net")))
 197             break
 198     # check if a port is used for ssh connection
 199     device["Ssh_if"] = False
 200     device["Active"] = ""
 201
 202     return device
 203
 204 def clear_data():
 205     '''This function clears any old data'''
 206     devices = {}
 207
 208 def get_device_details(devices_type):
 209     '''This function populates the "devices" dictionary. The keys used are
 210     the pci addresses (domain:bus:slot.func). The values are themselves
 211     dictionaries - one for each NIC.'''
 212     global devices
 213     global dpdk_drivers
 214
 215     # first loop through and read details for all devices
 216     # request machine readable format, with numeric IDs and String
 217     dev = {}
 218     dev_lines = check_output(["lspci", "-Dvmmnnk"]).splitlines()
 219     for dev_line in dev_lines:
 220         if len(dev_line) == 0:
 221             if device_type_match(dev, devices_type):
 222                 # Replace "Driver" with "Driver_str" to have consistency of
 223                 # of dictionary key names
 224                 if "Driver" in dev.keys():
 225                     dev["Driver_str"] = dev.pop("Driver")
 226                 if "Module" in dev.keys():
 227                     dev["Module_str"] = dev.pop("Module")
 228                 # use dict to make copy of dev
 229                 devices[dev["Slot"]] = dict(dev)
 230             # Clear previous device's data
 231             dev = {}
 232         else:
 233             name, value = dev_line.decode().split("\t", 1)
 234             value_list = value.rsplit(' ', 1)
 235             if len(value_list) > 1:
 236                 # String stored in <name>_str
 237                 dev[name.rstrip(":") + '_str'] = value_list[0]
 238             # Numeric IDs
 239             dev[name.rstrip(":")] = value_list[len(value_list) - 1] \
 240                 .rstrip("]").lstrip("[")
 241
 242     if devices_type == network_devices:
 243         # check what is the interface if any for an ssh connection if
 244         # any to this host, so we can mark it later.
 245         ssh_if = []
 246         route = check_output(["ip", "-o", "route"])
 247         # filter out all lines for 169.254 routes
 248         route = "\n".join(filter(lambda ln: not ln.startswith("169.254"),
 249                              route.decode().splitlines()))
 250         rt_info = route.split()
 251         for i in range(len(rt_info) - 1):
 252             if rt_info[i] == "dev":
 253                 ssh_if.append(rt_info[i+1])
 254
 255     # based on the basic info, get extended text details
 256     for d in devices.keys():
 257         if not device_type_match(devices[d], devices_type):
 258             continue
 259
 260         # get additional info and add it to existing data
 261         devices[d] = devices[d].copy()
 262         # No need to probe lspci
 263         devices[d].update(get_pci_device_details(d, False).items())
 264
 265         if devices_type == network_devices:
 266             for _if in ssh_if:
 267                 if _if in devices[d]["Interface"].split(","):
 268                     devices[d]["Ssh_if"] = True
 269                     devices[d]["Active"] = "*Active*"
 270                     break
 271
 272         # add igb_uio to list of supporting modules if needed
 273         if "Module_str" in devices[d]:
 274             for driver in dpdk_drivers:
 275                 if driver not in devices[d]["Module_str"]:
 276                     devices[d]["Module_str"] = \
 277                         devices[d]["Module_str"] + ",%s" % driver
 278         else:
 279             devices[d]["Module_str"] = ",".join(dpdk_drivers)
 280
 281         # make sure the driver and module strings do not have any duplicates
 282         if has_driver(d):
 283             modules = devices[d]["Module_str"].split(",")
 284             if devices[d]["Driver_str"] in modules:
 285                 modules.remove(devices[d]["Driver_str"])
 286                 devices[d]["Module_str"] = ",".join(modules)
 287
 288
 289 def device_type_match(dev, devices_type):
 290     for i in range(len(devices_type)):
 291         param_count = len(
 292             [x for x in devices_type[i].values() if x is not None])
 293         match_count = 0
 294         if dev["Class"][0:2] == devices_type[i]["Class"]:
 295             match_count = match_count + 1
 296             for key in devices_type[i].keys():
 297                 if key != 'Class' and devices_type[i][key]:
 298                     value_list = devices_type[i][key].split(',')
 299                     for value in value_list:
 300                         if value.strip(' ') == dev[key]:
 301                             match_count = match_count + 1
 302             # count must be the number of non None parameters to match
 303             if match_count == param_count:
 304                 return True
 305     return False
 306
 307 def dev_id_from_dev_name(dev_name):
 308     '''Take a device "name" - a string passed in by user to identify a NIC
 309     device, and determine the device id - i.e. the domain:bus:slot.func - for
 310     it, which can then be used to index into the devices array'''
 311
 312     # check if it's already a suitable index
 313     if dev_name in devices:
 314         return dev_name
 315     # check if it's an index just missing the domain part
 316     elif "0000:" + dev_name in devices:
 317         return "0000:" + dev_name
 318     else:
 319         # check if it's an interface name, e.g. eth1
 320         for d in devices.keys():
 321             if dev_name in devices[d]["Interface"].split(","):
 322                 return devices[d]["Slot"]
 323     # if nothing else matches - error
 324     print("Unknown device: %s. "
 325           "Please specify device in \"bus:slot.func\" format" % dev_name)
 326     sys.exit(1)
 327
 328
 329 def unbind_one(dev_id, force):
 330     '''Unbind the device identified by "dev_id" from its current driver'''
 331     dev = devices[dev_id]
 332     if not has_driver(dev_id):
 333         print("%s %s %s is not currently managed by any driver\n" %
 334               (dev["Slot"], dev["Device_str"], dev["Interface"]))
 335         return
 336
 337     # prevent us disconnecting ourselves
 338     if dev["Ssh_if"] and not force:
 339         print("Routing table indicates that interface %s is active. "
 340               "Skipping unbind" % (dev_id))
 341         return
 342
 343     # write to /sys to unbind
 344     filename = "/sys/bus/pci/drivers/%s/unbind" % dev["Driver_str"]
 345     try:
 346         f = open(filename, "a")
 347     except:
 348         print("Error: unbind failed for %s - Cannot open %s"
 349               % (dev_id, filename))
 350         sys.exit(1)
 351     f.write(dev_id)
 352     f.close()
 353
 354
 355 def bind_one(dev_id, driver, force):
 356     '''Bind the device given by "dev_id" to the driver "driver". If the device
 357     is already bound to a different driver, it will be unbound first'''
 358     dev = devices[dev_id]
 359     saved_driver = None  # used to rollback any unbind in case of failure
 360
 361     # prevent disconnection of our ssh session
 362     if dev["Ssh_if"] and not force:
 363         print("Routing table indicates that interface %s is active. "
 364               "Not modifying" % (dev_id))
 365         return
 366
 367     # unbind any existing drivers we don't want
 368     if has_driver(dev_id):
 369         if dev["Driver_str"] == driver:
 370             print("%s already bound to driver %s, skipping\n"
 371                   % (dev_id, driver))
 372             return
 373         else:
 374             saved_driver = dev["Driver_str"]
 375             unbind_one(dev_id, force)
 376             dev["Driver_str"] = ""  # clear driver string
 377
 378     # For kernels >= 3.15 driver_override can be used to specify the driver
 379     # for a device rather than relying on the driver to provide a positive
 380     # match of the device.  The existing process of looking up
 381     # the vendor and device ID, adding them to the driver new_id,
 382     # will erroneously bind other devices too which has the additional burden
 383     # of unbinding those devices
 384     if driver in dpdk_drivers:
 385         filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
 386         if os.path.exists(filename):
 387             try:
 388                 f = open(filename, "w")
 389             except:
 390                 print("Error: bind failed for %s - Cannot open %s"
 391                       % (dev_id, filename))
 392                 return
 393             try:
 394                 f.write("%s" % driver)
 395                 f.close()
 396             except:
 397                 print("Error: bind failed for %s - Cannot write driver %s to "
 398                       "PCI ID " % (dev_id, driver))
 399                 return
 400         # For kernels < 3.15 use new_id to add PCI id's to the driver
 401         else:
 402             filename = "/sys/bus/pci/drivers/%s/new_id" % driver
 403             try:
 404                 f = open(filename, "w")
 405             except:
 406                 print("Error: bind failed for %s - Cannot open %s"
 407                       % (dev_id, filename))
 408                 return
 409             try:
 410                 # Convert Device and Vendor Id to int to write to new_id
 411                 f.write("%04x %04x" % (int(dev["Vendor"],16),
 412                         int(dev["Device"], 16)))
 413                 f.close()
 414             except:
 415                 print("Error: bind failed for %s - Cannot write new PCI ID to "
 416                       "driver %s" % (dev_id, driver))
 417                 return
 418
 419     # do the bind by writing to /sys
 420     filename = "/sys/bus/pci/drivers/%s/bind" % driver
 421     try:
 422         f = open(filename, "a")
 423     except:
 424         print("Error: bind failed for %s - Cannot open %s"
 425               % (dev_id, filename))
 426         if saved_driver is not None:  # restore any previous driver
 427             bind_one(dev_id, saved_driver, force)
 428         return
 429     try:
 430         f.write(dev_id)
 431         f.close()
 432     except:
 433         # for some reason, closing dev_id after adding a new PCI ID to new_id
 434         # results in IOError. however, if the device was successfully bound,
 435         # we don't care for any errors and can safely ignore IOError
 436         tmp = get_pci_device_details(dev_id, True)
 437         if "Driver_str" in tmp and tmp["Driver_str"] == driver:
 438             return
 439         print("Error: bind failed for %s - Cannot bind to driver %s"
 440               % (dev_id, driver))
 441         if saved_driver is not None:  # restore any previous driver
 442             bind_one(dev_id, saved_driver, force)
 443         return
 444
 445     # For kernels > 3.15 driver_override is used to bind a device to a driver.
 446     # Before unbinding it, overwrite driver_override with empty string so that
 447     # the device can be bound to any other driver
 448     filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
 449     if os.path.exists(filename):
 450         try:
 451             f = open(filename, "w")
 452         except:
 453             print("Error: unbind failed for %s - Cannot open %s"
 454                   % (dev_id, filename))
 455             sys.exit(1)
 456         try:
 457             f.write("\00")
 458             f.close()
 459         except:
 460             print("Error: unbind failed for %s - Cannot open %s"
 461                   % (dev_id, filename))
 462             sys.exit(1)
 463
 464
 465 def unbind_all(dev_list, force=False):
 466     """Unbind method, takes a list of device locations"""
 467
 468     if dev_list[0] == "dpdk":
 469         for d in devices.keys():
 470             if "Driver_str" in devices[d]:
 471                 if devices[d]["Driver_str"] in dpdk_drivers:
 472                     unbind_one(devices[d]["Slot"], force)
 473         return
 474
 475     dev_list = map(dev_id_from_dev_name, dev_list)
 476     for d in dev_list:
 477         unbind_one(d, force)
 478
 479
 480 def bind_all(dev_list, driver, force=False):
 481     """Bind method, takes a list of device locations"""
 482     global devices
 483
 484     dev_list = map(dev_id_from_dev_name, dev_list)
 485
 486     for d in dev_list:
 487         bind_one(d, driver, force)
 488
 489     # For kernels < 3.15 when binding devices to a generic driver
 490     # (i.e. one that doesn't have a PCI ID table) using new_id, some devices
 491     # that are not bound to any other driver could be bound even if no one has
 492     # asked them to. hence, we check the list of drivers again, and see if
 493     # some of the previously-unbound devices were erroneously bound.
 494     if not os.path.exists("/sys/bus/pci/devices/%s/driver_override" % d):
 495         for d in devices.keys():
 496             # skip devices that were already bound or that we know should be bound
 497             if "Driver_str" in devices[d] or d in dev_list:
 498                 continue
 499
 500             # update information about this device
 501             devices[d] = dict(devices[d].items() +
 502                               get_pci_device_details(d, True).items())
 503
 504             # check if updated information indicates that the device was bound
 505             if "Driver_str" in devices[d]:
 506                 unbind_one(d, force)
 507
 508
 509 def display_devices(title, dev_list, extra_params=None):
 510     '''Displays to the user the details of a list of devices given in
 511     "dev_list". The "extra_params" parameter, if given, should contain a string
 512      with %()s fields in it for replacement by the named fields in each
 513      device's dictionary.'''
 514     strings = []  # this holds the strings to print. We sort before printing
 515     print("\n%s" % title)
 516     print("="*len(title))
 517     if len(dev_list) == 0:
 518         strings.append("<none>")
 519     else:
 520         for dev in dev_list:
 521             if extra_params is not None:
 522                 strings.append("%s '%s %s' %s" % (dev["Slot"],
 523                                                dev["Device_str"],
 524                                                dev["Device"],
 525                                                extra_params % dev))
 526             else:
 527                 strings.append("%s '%s'" % (dev["Slot"], dev["Device_str"]))
 528     # sort before printing, so that the entries appear in PCI order
 529     strings.sort()
 530     print("\n".join(strings))  # print one per line
 531
 532 def show_device_status(devices_type, device_name):
 533     global dpdk_drivers
 534     kernel_drv = []
 535     dpdk_drv = []
 536     no_drv = []
 537
 538     # split our list of network devices into the three categories above
 539     for d in devices.keys():
 540         if device_type_match(devices[d], devices_type):
 541             if not has_driver(d):
 542                 no_drv.append(devices[d])
 543                 continue
 544             if devices[d]["Driver_str"] in dpdk_drivers:
 545                 dpdk_drv.append(devices[d])
 546             else:
 547                 kernel_drv.append(devices[d])
 548
 549     # print each category separately, so we can clearly see what's used by DPDK
 550     display_devices("%s devices using DPDK-compatible driver" % device_name,
 551                     dpdk_drv, "drv=%(Driver_str)s unused=%(Module_str)s")
 552     display_devices("%s devices using kernel driver" % device_name, kernel_drv,
 553                     "if=%(Interface)s drv=%(Driver_str)s "
 554                     "unused=%(Module_str)s %(Active)s")
 555     display_devices("Other %s devices" % device_name, no_drv,
 556                     "unused=%(Module_str)s")
 557
 558 def show_status():
 559     '''Function called when the script is passed the "--status" option.
 560     Displays to the user what devices are bound to the igb_uio driver, the
 561     kernel driver or to no driver'''
 562
 563     if status_dev == "net" or status_dev == "all":
 564         show_device_status(network_devices, "Network")
 565
 566     if status_dev == "crypto" or status_dev == "all":
 567         show_device_status(crypto_devices, "Crypto")
 568
 569     if status_dev == "event" or status_dev == "all":
 570         show_device_status(eventdev_devices, "Eventdev")
 571
 572     if status_dev == "mempool" or status_dev == "all":
 573         show_device_status(mempool_devices, "Mempool")
 574
 575     if status_dev == "compress" or status_dev == "all":
 576         show_device_status(compress_devices , "Compress")
 577
 578
 579 def parse_args():
 580     '''Parses the command-line arguments given by the user and takes the
 581     appropriate action for each'''
 582     global b_flag
 583     global status_flag
 584     global status_dev
 585     global force_flag
 586     global args
 587     if len(sys.argv) <= 1:
 588         usage()
 589         sys.exit(0)
 590
 591     try:
 592         opts, args = getopt.getopt(sys.argv[1:], "b:us",
 593                                    ["help", "usage", "status", "status-dev=",
 594                                     "force", "bind=", "unbind", ])
 595     except getopt.GetoptError as error:
 596         print(str(error))
 597         print("Run '%s --usage' for further information" % sys.argv[0])
 598         sys.exit(1)
 599
 600     for opt, arg in opts:
 601         if opt == "--help" or opt == "--usage":
 602             usage()
 603             sys.exit(0)
 604         if opt == "--status-dev":
 605             status_flag = True
 606             status_dev = arg
 607         if opt == "--status" or opt == "-s":
 608             status_flag = True
 609             status_dev = "all"
 610         if opt == "--force":
 611             force_flag = True
 612         if opt == "-b" or opt == "-u" or opt == "--bind" or opt == "--unbind":
 613             if b_flag is not None:
 614                 print("Error - Only one bind or unbind may be specified\n")
 615                 sys.exit(1)
 616             if opt == "-u" or opt == "--unbind":
 617                 b_flag = "none"
 618             else:
 619                 b_flag = arg
 620
 621
 622 def do_arg_actions():
 623     '''do the actual action requested by the user'''
 624     global b_flag
 625     global status_flag
 626     global force_flag
 627     global args
 628
 629     if b_flag is None and not status_flag:
 630         print("Error: No action specified for devices."
 631               "Please give a -b or -u option")
 632         print("Run '%s --usage' for further information" % sys.argv[0])
 633         sys.exit(1)
 634
 635     if b_flag is not None and len(args) == 0:
 636         print("Error: No devices specified.")
 637         print("Run '%s --usage' for further information" % sys.argv[0])
 638         sys.exit(1)
 639
 640     if b_flag == "none" or b_flag == "None":
 641         unbind_all(args, force_flag)
 642     elif b_flag is not None:
 643         bind_all(args, b_flag, force_flag)
 644     if status_flag:
 645         if b_flag is not None:
 646             clear_data()
 647             # refresh if we have changed anything
 648             get_device_details(network_devices)
 649             get_device_details(crypto_devices)
 650             get_device_details(eventdev_devices)
 651             get_device_details(mempool_devices)
 652             get_device_details(compress_devices)
 653         show_status()
 654
 655
 656 def main():
 657     '''program main function'''
 658     parse_args()
 659     check_modules()
 660     clear_data()
 661     get_device_details(network_devices)
 662     get_device_details(crypto_devices)
 663     get_device_details(eventdev_devices)
 664     get_device_details(mempool_devices)
 665     get_device_details(compress_devices)
 666     do_arg_actions()
 667
 668 if __name__ == "__main__":
 669     main()