ceph/src/seastar/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 ifpga_class = {'Class': '12', 'Vendor': '8086', 'Device': '0b30',
  16                     'SVendor': None, 'SDevice': None}
  17 encryption_class = {'Class': '10', 'Vendor': None, 'Device': None,
  18                    'SVendor': None, 'SDevice': None}
  19 intel_processor_class = {'Class': '0b', 'Vendor': '8086', 'Device': None,
  20                    'SVendor': None, 'SDevice': None}
  21 cavium_sso = {'Class': '08', 'Vendor': '177d', 'Device': 'a04b,a04d',
  22               'SVendor': None, 'SDevice': None}
  23 cavium_fpa = {'Class': '08', 'Vendor': '177d', 'Device': 'a053',
  24               'SVendor': None, 'SDevice': None}
  25 cavium_pkx = {'Class': '08', 'Vendor': '177d', 'Device': 'a0dd,a049',
  26               'SVendor': None, 'SDevice': None}
  27 cavium_tim = {'Class': '08', 'Vendor': '177d', 'Device': 'a051',
  28               'SVendor': None, 'SDevice': None}
  29 cavium_zip = {'Class': '12', 'Vendor': '177d', 'Device': 'a037',
  30               'SVendor': None, 'SDevice': None}
  31 avp_vnic = {'Class': '05', 'Vendor': '1af4', 'Device': '1110',
  32               'SVendor': None, 'SDevice': None}
  33
  34 octeontx2_sso = {'Class': '08', 'Vendor': '177d', 'Device': 'a0f9,a0fa',
  35               'SVendor': None, 'SDevice': None}
  36 octeontx2_npa = {'Class': '08', 'Vendor': '177d', 'Device': 'a0fb,a0fc',
  37               'SVendor': None, 'SDevice': None}
  38
  39 network_devices = [network_class, cavium_pkx, avp_vnic, ifpga_class]
  40 crypto_devices = [encryption_class, intel_processor_class]
  41 eventdev_devices = [cavium_sso, cavium_tim, octeontx2_sso]
  42 mempool_devices = [cavium_fpa, octeontx2_npa]
  43 compress_devices = [cavium_zip]
  44
  45 # global dict ethernet devices present. Dictionary indexed by PCI address.
  46 # Each device within this is itself a dictionary of device properties
  47 devices = {}
  48 # list of supported DPDK drivers
  49 dpdk_drivers = ["igb_uio", "vfio-pci", "uio_pci_generic"]
  50
  51 # command-line arg flags
  52 b_flag = None
  53 status_flag = False
  54 force_flag = False
  55 args = []
  56
  57
  58 def usage():
  59     '''Print usage information for the program'''
  60     argv0 = basename(sys.argv[0])
  61     print("""
  62 Usage:
  63 ------
  64
  65      %(argv0)s [options] DEVICE1 DEVICE2 ....
  66
  67 where DEVICE1, DEVICE2 etc, are specified via PCI "domain:bus:slot.func" syntax
  68 or "bus:slot.func" syntax. For devices bound to Linux kernel drivers, they may
  69 also be referred to by Linux interface name e.g. eth0, eth1, em0, em1, etc.
  70
  71 Options:
  72     --help, --usage:
  73         Display usage information and quit
  74
  75     -s, --status:
  76         Print the current status of all known network, crypto, event
  77         and mempool devices.
  78         For each device, it displays the PCI domain, bus, slot and function,
  79         along with a text description of the device. Depending upon whether the
  80         device is being used by a kernel driver, the igb_uio driver, or no
  81         driver, other relevant information will be displayed:
  82         * the Linux interface name e.g. if=eth0
  83         * the driver being used e.g. drv=igb_uio
  84         * any suitable drivers not currently using that device
  85             e.g. unused=igb_uio
  86         NOTE: if this flag is passed along with a bind/unbind option, the
  87         status display will always occur after the other operations have taken
  88         place.
  89
  90     --status-dev:
  91         Print the status of given device group. Supported device groups are:
  92         "net", "crypto", "event", "mempool" and "compress"
  93
  94     -b driver, --bind=driver:
  95         Select the driver to use or \"none\" to unbind the device
  96
  97     -u, --unbind:
  98         Unbind a device (Equivalent to \"-b none\")
  99
 100     --force:
 101         By default, network devices which are used by Linux - as indicated by
 102         having routes in the routing table - cannot be modified. Using the
 103         --force flag overrides this behavior, allowing active links to be
 104         forcibly unbound.
 105         WARNING: This can lead to loss of network connection and should be used
 106         with caution.
 107
 108 Examples:
 109 ---------
 110
 111 To display current device status:
 112         %(argv0)s --status
 113
 114 To display current network device status:
 115         %(argv0)s --status-dev net
 116
 117 To bind eth1 from the current driver and move to use igb_uio
 118         %(argv0)s --bind=igb_uio eth1
 119
 120 To unbind 0000:01:00.0 from using any driver
 121         %(argv0)s -u 0000:01:00.0
 122
 123 To bind 0000:02:00.0 and 0000:02:00.1 to the ixgbe kernel driver
 124         %(argv0)s -b ixgbe 02:00.0 02:00.1
 125
 126     """ % locals())  # replace items from local variables
 127
 128
 129 # This is roughly compatible with check_output function in subprocess module
 130 # which is only available in python 2.7.
 131 def check_output(args, stderr=None):
 132     '''Run a command and capture its output'''
 133     return subprocess.Popen(args, stdout=subprocess.PIPE,
 134                             stderr=stderr).communicate()[0]
 135
 136
 137 def check_modules():
 138     '''Checks that igb_uio is loaded'''
 139     global dpdk_drivers
 140
 141     # list of supported modules
 142     mods = [{"Name": driver, "Found": False} for driver in dpdk_drivers]
 143
 144     # first check if module is loaded
 145     try:
 146         # Get list of sysfs modules (both built-in and dynamically loaded)
 147         sysfs_path = '/sys/module/'
 148
 149         # Get the list of directories in sysfs_path
 150         sysfs_mods = [os.path.join(sysfs_path, o) for o
 151                       in os.listdir(sysfs_path)
 152                       if os.path.isdir(os.path.join(sysfs_path, o))]
 153
 154         # Extract the last element of '/sys/module/abc' in the array
 155         sysfs_mods = [a.split('/')[-1] for a in sysfs_mods]
 156
 157         # special case for vfio_pci (module is named vfio-pci,
 158         # but its .ko is named vfio_pci)
 159         sysfs_mods = [a if a != 'vfio_pci' else 'vfio-pci' for a in sysfs_mods]
 160
 161         for mod in mods:
 162             if mod["Name"] in sysfs_mods:
 163                 mod["Found"] = True
 164     except:
 165         pass
 166
 167     # check if we have at least one loaded module
 168     if True not in [mod["Found"] for mod in mods] and b_flag is not None:
 169         if b_flag in dpdk_drivers:
 170             print("Error - no supported modules(DPDK driver) are loaded")
 171             sys.exit(1)
 172         else:
 173             print("Warning - no supported modules(DPDK driver) are loaded")
 174
 175     # change DPDK driver list to only contain drivers that are loaded
 176     dpdk_drivers = [mod["Name"] for mod in mods if mod["Found"]]
 177
 178
 179 def has_driver(dev_id):
 180     '''return true if a device is assigned to a driver. False otherwise'''
 181     return "Driver_str" in devices[dev_id]
 182
 183
 184 def get_pci_device_details(dev_id, probe_lspci):
 185     '''This function gets additional details for a PCI device'''
 186     device = {}
 187
 188     if probe_lspci:
 189         extra_info = check_output(["lspci", "-vmmks", dev_id]).splitlines()
 190
 191         # parse lspci details
 192         for line in extra_info:
 193             if len(line) == 0:
 194                 continue
 195             name, value = line.decode().split("\t", 1)
 196             name = name.strip(":") + "_str"
 197             device[name] = value
 198     # check for a unix interface name
 199     device["Interface"] = ""
 200     for base, dirs, _ in os.walk("/sys/bus/pci/devices/%s/" % dev_id):
 201         if "net" in dirs:
 202             device["Interface"] = \
 203                 ",".join(os.listdir(os.path.join(base, "net")))
 204             break
 205     # check if a port is used for ssh connection
 206     device["Ssh_if"] = False
 207     device["Active"] = ""
 208
 209     return device
 210
 211 def clear_data():
 212     '''This function clears any old data'''
 213     devices = {}
 214
 215 def get_device_details(devices_type):
 216     '''This function populates the "devices" dictionary. The keys used are
 217     the pci addresses (domain:bus:slot.func). The values are themselves
 218     dictionaries - one for each NIC.'''
 219     global devices
 220     global dpdk_drivers
 221
 222     # first loop through and read details for all devices
 223     # request machine readable format, with numeric IDs and String
 224     dev = {}
 225     dev_lines = check_output(["lspci", "-Dvmmnnk"]).splitlines()
 226     for dev_line in dev_lines:
 227         if len(dev_line) == 0:
 228             if device_type_match(dev, devices_type):
 229                 # Replace "Driver" with "Driver_str" to have consistency of
 230                 # of dictionary key names
 231                 if "Driver" in dev.keys():
 232                     dev["Driver_str"] = dev.pop("Driver")
 233                 if "Module" in dev.keys():
 234                     dev["Module_str"] = dev.pop("Module")
 235                 # use dict to make copy of dev
 236                 devices[dev["Slot"]] = dict(dev)
 237             # Clear previous device's data
 238             dev = {}
 239         else:
 240             name, value = dev_line.decode().split("\t", 1)
 241             value_list = value.rsplit(' ', 1)
 242             if len(value_list) > 1:
 243                 # String stored in <name>_str
 244                 dev[name.rstrip(":") + '_str'] = value_list[0]
 245             # Numeric IDs
 246             dev[name.rstrip(":")] = value_list[len(value_list) - 1] \
 247                 .rstrip("]").lstrip("[")
 248
 249     if devices_type == network_devices:
 250         # check what is the interface if any for an ssh connection if
 251         # any to this host, so we can mark it later.
 252         ssh_if = []
 253         route = check_output(["ip", "-o", "route"])
 254         # filter out all lines for 169.254 routes
 255         route = "\n".join(filter(lambda ln: not ln.startswith("169.254"),
 256                              route.decode().splitlines()))
 257         rt_info = route.split()
 258         for i in range(len(rt_info) - 1):
 259             if rt_info[i] == "dev":
 260                 ssh_if.append(rt_info[i+1])
 261
 262     # based on the basic info, get extended text details
 263     for d in devices.keys():
 264         if not device_type_match(devices[d], devices_type):
 265             continue
 266
 267         # get additional info and add it to existing data
 268         devices[d] = devices[d].copy()
 269         # No need to probe lspci
 270         devices[d].update(get_pci_device_details(d, False).items())
 271
 272         if devices_type == network_devices:
 273             for _if in ssh_if:
 274                 if _if in devices[d]["Interface"].split(","):
 275                     devices[d]["Ssh_if"] = True
 276                     devices[d]["Active"] = "*Active*"
 277                     break
 278
 279         # add igb_uio to list of supporting modules if needed
 280         if "Module_str" in devices[d]:
 281             for driver in dpdk_drivers:
 282                 if driver not in devices[d]["Module_str"]:
 283                     devices[d]["Module_str"] = \
 284                         devices[d]["Module_str"] + ",%s" % driver
 285         else:
 286             devices[d]["Module_str"] = ",".join(dpdk_drivers)
 287
 288         # make sure the driver and module strings do not have any duplicates
 289         if has_driver(d):
 290             modules = devices[d]["Module_str"].split(",")
 291             if devices[d]["Driver_str"] in modules:
 292                 modules.remove(devices[d]["Driver_str"])
 293                 devices[d]["Module_str"] = ",".join(modules)
 294
 295
 296 def device_type_match(dev, devices_type):
 297     for i in range(len(devices_type)):
 298         param_count = len(
 299             [x for x in devices_type[i].values() if x is not None])
 300         match_count = 0
 301         if dev["Class"][0:2] == devices_type[i]["Class"]:
 302             match_count = match_count + 1
 303             for key in devices_type[i].keys():
 304                 if key != 'Class' and devices_type[i][key]:
 305                     value_list = devices_type[i][key].split(',')
 306                     for value in value_list:
 307                         if value.strip(' ') == dev[key]:
 308                             match_count = match_count + 1
 309             # count must be the number of non None parameters to match
 310             if match_count == param_count:
 311                 return True
 312     return False
 313
 314 def dev_id_from_dev_name(dev_name):
 315     '''Take a device "name" - a string passed in by user to identify a NIC
 316     device, and determine the device id - i.e. the domain:bus:slot.func - for
 317     it, which can then be used to index into the devices array'''
 318
 319     # check if it's already a suitable index
 320     if dev_name in devices:
 321         return dev_name
 322     # check if it's an index just missing the domain part
 323     elif "0000:" + dev_name in devices:
 324         return "0000:" + dev_name
 325     else:
 326         # check if it's an interface name, e.g. eth1
 327         for d in devices.keys():
 328             if dev_name in devices[d]["Interface"].split(","):
 329                 return devices[d]["Slot"]
 330     # if nothing else matches - error
 331     print("Unknown device: %s. "
 332           "Please specify device in \"bus:slot.func\" format" % dev_name)
 333     sys.exit(1)
 334
 335
 336 def unbind_one(dev_id, force):
 337     '''Unbind the device identified by "dev_id" from its current driver'''
 338     dev = devices[dev_id]
 339     if not has_driver(dev_id):
 340         print("%s %s %s is not currently managed by any driver\n" %
 341               (dev["Slot"], dev["Device_str"], dev["Interface"]))
 342         return
 343
 344     # prevent us disconnecting ourselves
 345     if dev["Ssh_if"] and not force:
 346         print("Routing table indicates that interface %s is active. "
 347               "Skipping unbind" % (dev_id))
 348         return
 349
 350     # write to /sys to unbind
 351     filename = "/sys/bus/pci/drivers/%s/unbind" % dev["Driver_str"]
 352     try:
 353         f = open(filename, "a")
 354     except:
 355         print("Error: unbind failed for %s - Cannot open %s"
 356               % (dev_id, filename))
 357         sys.exit(1)
 358     f.write(dev_id)
 359     f.close()
 360
 361
 362 def bind_one(dev_id, driver, force):
 363     '''Bind the device given by "dev_id" to the driver "driver". If the device
 364     is already bound to a different driver, it will be unbound first'''
 365     dev = devices[dev_id]
 366     saved_driver = None  # used to rollback any unbind in case of failure
 367
 368     # prevent disconnection of our ssh session
 369     if dev["Ssh_if"] and not force:
 370         print("Routing table indicates that interface %s is active. "
 371               "Not modifying" % (dev_id))
 372         return
 373
 374     # unbind any existing drivers we don't want
 375     if has_driver(dev_id):
 376         if dev["Driver_str"] == driver:
 377             print("%s already bound to driver %s, skipping\n"
 378                   % (dev_id, driver))
 379             return
 380         else:
 381             saved_driver = dev["Driver_str"]
 382             unbind_one(dev_id, force)
 383             dev["Driver_str"] = ""  # clear driver string
 384
 385     # For kernels >= 3.15 driver_override can be used to specify the driver
 386     # for a device rather than relying on the driver to provide a positive
 387     # match of the device.  The existing process of looking up
 388     # the vendor and device ID, adding them to the driver new_id,
 389     # will erroneously bind other devices too which has the additional burden
 390     # of unbinding those devices
 391     if driver in dpdk_drivers:
 392         filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
 393         if os.path.exists(filename):
 394             try:
 395                 f = open(filename, "w")
 396             except:
 397                 print("Error: bind failed for %s - Cannot open %s"
 398                       % (dev_id, filename))
 399                 return
 400             try:
 401                 f.write("%s" % driver)
 402                 f.close()
 403             except:
 404                 print("Error: bind failed for %s - Cannot write driver %s to "
 405                       "PCI ID " % (dev_id, driver))
 406                 return
 407         # For kernels < 3.15 use new_id to add PCI id's to the driver
 408         else:
 409             filename = "/sys/bus/pci/drivers/%s/new_id" % driver
 410             try:
 411                 f = open(filename, "w")
 412             except:
 413                 print("Error: bind failed for %s - Cannot open %s"
 414                       % (dev_id, filename))
 415                 return
 416             try:
 417                 # Convert Device and Vendor Id to int to write to new_id
 418                 f.write("%04x %04x" % (int(dev["Vendor"],16),
 419                         int(dev["Device"], 16)))
 420                 f.close()
 421             except:
 422                 print("Error: bind failed for %s - Cannot write new PCI ID to "
 423                       "driver %s" % (dev_id, driver))
 424                 return
 425
 426     # do the bind by writing to /sys
 427     filename = "/sys/bus/pci/drivers/%s/bind" % driver
 428     try:
 429         f = open(filename, "a")
 430     except:
 431         print("Error: bind failed for %s - Cannot open %s"
 432               % (dev_id, filename))
 433         if saved_driver is not None:  # restore any previous driver
 434             bind_one(dev_id, saved_driver, force)
 435         return
 436     try:
 437         f.write(dev_id)
 438         f.close()
 439     except:
 440         # for some reason, closing dev_id after adding a new PCI ID to new_id
 441         # results in IOError. however, if the device was successfully bound,
 442         # we don't care for any errors and can safely ignore IOError
 443         tmp = get_pci_device_details(dev_id, True)
 444         if "Driver_str" in tmp and tmp["Driver_str"] == driver:
 445             return
 446         print("Error: bind failed for %s - Cannot bind to driver %s"
 447               % (dev_id, driver))
 448         if saved_driver is not None:  # restore any previous driver
 449             bind_one(dev_id, saved_driver, force)
 450         return
 451
 452     # For kernels > 3.15 driver_override is used to bind a device to a driver.
 453     # Before unbinding it, overwrite driver_override with empty string so that
 454     # the device can be bound to any other driver
 455     filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
 456     if os.path.exists(filename):
 457         try:
 458             f = open(filename, "w")
 459         except:
 460             print("Error: unbind failed for %s - Cannot open %s"
 461                   % (dev_id, filename))
 462             sys.exit(1)
 463         try:
 464             f.write("\00")
 465             f.close()
 466         except:
 467             print("Error: unbind failed for %s - Cannot open %s"
 468                   % (dev_id, filename))
 469             sys.exit(1)
 470
 471
 472 def unbind_all(dev_list, force=False):
 473     """Unbind method, takes a list of device locations"""
 474
 475     if dev_list[0] == "dpdk":
 476         for d in devices.keys():
 477             if "Driver_str" in devices[d]:
 478                 if devices[d]["Driver_str"] in dpdk_drivers:
 479                     unbind_one(devices[d]["Slot"], force)
 480         return
 481
 482     dev_list = map(dev_id_from_dev_name, dev_list)
 483     for d in dev_list:
 484         unbind_one(d, force)
 485
 486
 487 def bind_all(dev_list, driver, force=False):
 488     """Bind method, takes a list of device locations"""
 489     global devices
 490
 491     dev_list = map(dev_id_from_dev_name, dev_list)
 492
 493     for d in dev_list:
 494         bind_one(d, driver, force)
 495
 496     # For kernels < 3.15 when binding devices to a generic driver
 497     # (i.e. one that doesn't have a PCI ID table) using new_id, some devices
 498     # that are not bound to any other driver could be bound even if no one has
 499     # asked them to. hence, we check the list of drivers again, and see if
 500     # some of the previously-unbound devices were erroneously bound.
 501     if not os.path.exists("/sys/bus/pci/devices/%s/driver_override" % d):
 502         for d in devices.keys():
 503             # skip devices that were already bound or that we know should be bound
 504             if "Driver_str" in devices[d] or d in dev_list:
 505                 continue
 506
 507             # update information about this device
 508             devices[d] = dict(devices[d].items() +
 509                               get_pci_device_details(d, True).items())
 510
 511             # check if updated information indicates that the device was bound
 512             if "Driver_str" in devices[d]:
 513                 unbind_one(d, force)
 514
 515
 516 def display_devices(title, dev_list, extra_params=None):
 517     '''Displays to the user the details of a list of devices given in
 518     "dev_list". The "extra_params" parameter, if given, should contain a string
 519      with %()s fields in it for replacement by the named fields in each
 520      device's dictionary.'''
 521     strings = []  # this holds the strings to print. We sort before printing
 522     print("\n%s" % title)
 523     print("="*len(title))
 524     if len(dev_list) == 0:
 525         strings.append("<none>")
 526     else:
 527         for dev in dev_list:
 528             if extra_params is not None:
 529                 strings.append("%s '%s %s' %s" % (dev["Slot"],
 530                                                dev["Device_str"],
 531                                                dev["Device"],
 532                                                extra_params % dev))
 533             else:
 534                 strings.append("%s '%s'" % (dev["Slot"], dev["Device_str"]))
 535     # sort before printing, so that the entries appear in PCI order
 536     strings.sort()
 537     print("\n".join(strings))  # print one per line
 538
 539 def show_device_status(devices_type, device_name):
 540     global dpdk_drivers
 541     kernel_drv = []
 542     dpdk_drv = []
 543     no_drv = []
 544
 545     # split our list of network devices into the three categories above
 546     for d in devices.keys():
 547         if device_type_match(devices[d], devices_type):
 548             if not has_driver(d):
 549                 no_drv.append(devices[d])
 550                 continue
 551             if devices[d]["Driver_str"] in dpdk_drivers:
 552                 dpdk_drv.append(devices[d])
 553             else:
 554                 kernel_drv.append(devices[d])
 555
 556     n_devs = len(dpdk_drv) + len(kernel_drv) + len(no_drv)
 557
 558     # don't bother displaying anything if there are no devices
 559     if n_devs == 0:
 560         msg = "No '%s' devices detected" % device_name
 561         print("")
 562         print(msg)
 563         print("".join('=' * len(msg)))
 564         return
 565
 566     # print each category separately, so we can clearly see what's used by DPDK
 567     if len(dpdk_drv) != 0:
 568         display_devices("%s devices using DPDK-compatible driver" % device_name,
 569                         dpdk_drv, "drv=%(Driver_str)s unused=%(Module_str)s")
 570     if len(kernel_drv) != 0:
 571         display_devices("%s devices using kernel driver" % device_name, kernel_drv,
 572                         "if=%(Interface)s drv=%(Driver_str)s "
 573                         "unused=%(Module_str)s %(Active)s")
 574     if len(no_drv) != 0:
 575         display_devices("Other %s devices" % device_name, no_drv,
 576                         "unused=%(Module_str)s")
 577
 578 def show_status():
 579     '''Function called when the script is passed the "--status" option.
 580     Displays to the user what devices are bound to the igb_uio driver, the
 581     kernel driver or to no driver'''
 582
 583     if status_dev == "net" or status_dev == "all":
 584         show_device_status(network_devices, "Network")
 585
 586     if status_dev == "crypto" or status_dev == "all":
 587         show_device_status(crypto_devices, "Crypto")
 588
 589     if status_dev == "event" or status_dev == "all":
 590         show_device_status(eventdev_devices, "Eventdev")
 591
 592     if status_dev == "mempool" or status_dev == "all":
 593         show_device_status(mempool_devices, "Mempool")
 594
 595     if status_dev == "compress" or status_dev == "all":
 596         show_device_status(compress_devices , "Compress")
 597
 598
 599 def parse_args():
 600     '''Parses the command-line arguments given by the user and takes the
 601     appropriate action for each'''
 602     global b_flag
 603     global status_flag
 604     global status_dev
 605     global force_flag
 606     global args
 607     if len(sys.argv) <= 1:
 608         usage()
 609         sys.exit(0)
 610
 611     try:
 612         opts, args = getopt.getopt(sys.argv[1:], "b:us",
 613                                    ["help", "usage", "status", "status-dev=",
 614                                     "force", "bind=", "unbind", ])
 615     except getopt.GetoptError as error:
 616         print(str(error))
 617         print("Run '%s --usage' for further information" % sys.argv[0])
 618         sys.exit(1)
 619
 620     for opt, arg in opts:
 621         if opt == "--help" or opt == "--usage":
 622             usage()
 623             sys.exit(0)
 624         if opt == "--status-dev":
 625             status_flag = True
 626             status_dev = arg
 627         if opt == "--status" or opt == "-s":
 628             status_flag = True
 629             status_dev = "all"
 630         if opt == "--force":
 631             force_flag = True
 632         if opt == "-b" or opt == "-u" or opt == "--bind" or opt == "--unbind":
 633             if b_flag is not None:
 634                 print("Error - Only one bind or unbind may be specified\n")
 635                 sys.exit(1)
 636             if opt == "-u" or opt == "--unbind":
 637                 b_flag = "none"
 638             else:
 639                 b_flag = arg
 640
 641
 642 def do_arg_actions():
 643     '''do the actual action requested by the user'''
 644     global b_flag
 645     global status_flag
 646     global force_flag
 647     global args
 648
 649     if b_flag is None and not status_flag:
 650         print("Error: No action specified for devices."
 651               "Please give a -b or -u option")
 652         print("Run '%s --usage' for further information" % sys.argv[0])
 653         sys.exit(1)
 654
 655     if b_flag is not None and len(args) == 0:
 656         print("Error: No devices specified.")
 657         print("Run '%s --usage' for further information" % sys.argv[0])
 658         sys.exit(1)
 659
 660     if b_flag == "none" or b_flag == "None":
 661         unbind_all(args, force_flag)
 662     elif b_flag is not None:
 663         bind_all(args, b_flag, force_flag)
 664     if status_flag:
 665         if b_flag is not None:
 666             clear_data()
 667             # refresh if we have changed anything
 668             get_device_details(network_devices)
 669             get_device_details(crypto_devices)
 670             get_device_details(eventdev_devices)
 671             get_device_details(mempool_devices)
 672             get_device_details(compress_devices)
 673         show_status()
 674
 675
 676 def main():
 677     '''program main function'''
 678     # check if lspci is installed, suppress any output
 679     with open(os.devnull, 'w') as devnull:
 680         ret = subprocess.call(['which', 'lspci'],
 681                               stdout=devnull, stderr=devnull)
 682         if ret != 0:
 683             print("'lspci' not found - please install 'pciutils'")
 684             sys.exit(1)
 685     parse_args()
 686     check_modules()
 687     clear_data()
 688     get_device_details(network_devices)
 689     get_device_details(crypto_devices)
 690     get_device_details(eventdev_devices)
 691     get_device_details(mempool_devices)
 692     get_device_details(compress_devices)
 693     do_arg_actions()
 694
 695 if __name__ == "__main__":
 696     main()