cb4a1d14bf
Adding the support to bind/unbind crypto devices with dpdk-devbind.py script, as now it is not restricted to network devices anymore. Signed-off-by: Eoin Breen <eoin.breen@intel.com> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com> Acked-by: Deepak Kumar Jain <deepak.k.jain@intel.com>
652 lines
23 KiB
Python
Executable File
652 lines
23 KiB
Python
Executable File
#! /usr/bin/python
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#
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# BSD LICENSE
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#
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# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Intel Corporation nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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import sys
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import os
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import getopt
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import subprocess
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from os.path import exists, abspath, dirname, basename
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# The PCI base class for NETWORK devices
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NETWORK_BASE_CLASS = "02"
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CRYPTO_BASE_CLASS = "0b"
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# global dict ethernet devices present. Dictionary indexed by PCI address.
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# Each device within this is itself a dictionary of device properties
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devices = {}
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# list of supported DPDK drivers
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dpdk_drivers = ["igb_uio", "vfio-pci", "uio_pci_generic"]
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# command-line arg flags
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b_flag = None
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status_flag = False
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force_flag = False
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args = []
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def usage():
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'''Print usage information for the program'''
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argv0 = basename(sys.argv[0])
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print("""
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Usage:
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------
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%(argv0)s [options] DEVICE1 DEVICE2 ....
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where DEVICE1, DEVICE2 etc, are specified via PCI "domain:bus:slot.func" syntax
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or "bus:slot.func" syntax. For devices bound to Linux kernel drivers, they may
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also be referred to by Linux interface name e.g. eth0, eth1, em0, em1, etc.
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Options:
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--help, --usage:
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Display usage information and quit
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-s, --status:
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Print the current status of all known network and crypto devices.
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For each device, it displays the PCI domain, bus, slot and function,
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along with a text description of the device. Depending upon whether the
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device is being used by a kernel driver, the igb_uio driver, or no
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driver, other relevant information will be displayed:
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* the Linux interface name e.g. if=eth0
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* the driver being used e.g. drv=igb_uio
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* any suitable drivers not currently using that device
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e.g. unused=igb_uio
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NOTE: if this flag is passed along with a bind/unbind option, the
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status display will always occur after the other operations have taken
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place.
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-b driver, --bind=driver:
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Select the driver to use or \"none\" to unbind the device
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-u, --unbind:
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Unbind a device (Equivalent to \"-b none\")
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--force:
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By default, network devices which are used by Linux - as indicated by having
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routes in the routing table - cannot be modified. Using the --force
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flag overrides this behavior, allowing active links to be forcibly
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unbound.
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WARNING: This can lead to loss of network connection and should be used
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with caution.
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Examples:
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---------
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To display current device status:
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%(argv0)s --status
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To bind eth1 from the current driver and move to use igb_uio
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%(argv0)s --bind=igb_uio eth1
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To unbind 0000:01:00.0 from using any driver
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%(argv0)s -u 0000:01:00.0
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To bind 0000:02:00.0 and 0000:02:00.1 to the ixgbe kernel driver
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%(argv0)s -b ixgbe 02:00.0 02:00.1
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""" % locals()) # replace items from local variables
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# This is roughly compatible with check_output function in subprocess module
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# which is only available in python 2.7.
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def check_output(args, stderr=None):
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'''Run a command and capture its output'''
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return subprocess.Popen(args, stdout=subprocess.PIPE,
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stderr=stderr).communicate()[0]
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def find_module(mod):
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'''find the .ko file for kernel module named mod.
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Searches the $RTE_SDK/$RTE_TARGET directory, the kernel
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modules directory and finally under the parent directory of
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the script '''
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# check $RTE_SDK/$RTE_TARGET directory
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if 'RTE_SDK' in os.environ and 'RTE_TARGET' in os.environ:
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path = "%s/%s/kmod/%s.ko" % (os.environ['RTE_SDK'],
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os.environ['RTE_TARGET'], mod)
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if exists(path):
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return path
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# check using depmod
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try:
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depmod_out = check_output(["modinfo", "-n", mod],
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stderr=subprocess.STDOUT).lower()
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if "error" not in depmod_out:
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path = depmod_out.strip()
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if exists(path):
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return path
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except: # if modinfo can't find module, it fails, so continue
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pass
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# check for a copy based off current path
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tools_dir = dirname(abspath(sys.argv[0]))
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if (tools_dir.endswith("tools")):
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base_dir = dirname(tools_dir)
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find_out = check_output(["find", base_dir, "-name", mod + ".ko"])
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if len(find_out) > 0: # something matched
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path = find_out.splitlines()[0]
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if exists(path):
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return path
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def check_modules():
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'''Checks that igb_uio is loaded'''
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global dpdk_drivers
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# list of supported modules
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mods = [{"Name": driver, "Found": False} for driver in dpdk_drivers]
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# first check if module is loaded
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try:
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# Get list of sysfs modules (both built-in and dynamically loaded)
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sysfs_path = '/sys/module/'
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# Get the list of directories in sysfs_path
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sysfs_mods = [os.path.join(sysfs_path, o) for o
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in os.listdir(sysfs_path)
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if os.path.isdir(os.path.join(sysfs_path, o))]
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# Extract the last element of '/sys/module/abc' in the array
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sysfs_mods = [a.split('/')[-1] for a in sysfs_mods]
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# special case for vfio_pci (module is named vfio-pci,
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# but its .ko is named vfio_pci)
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sysfs_mods = map(lambda a:
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a if a != 'vfio_pci' else 'vfio-pci', sysfs_mods)
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for mod in mods:
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if mod["Name"] in sysfs_mods:
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mod["Found"] = True
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except:
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pass
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# check if we have at least one loaded module
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if True not in [mod["Found"] for mod in mods] and b_flag is not None:
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if b_flag in dpdk_drivers:
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print("Error - no supported modules(DPDK driver) are loaded")
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sys.exit(1)
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else:
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print("Warning - no supported modules(DPDK driver) are loaded")
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# change DPDK driver list to only contain drivers that are loaded
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dpdk_drivers = [mod["Name"] for mod in mods if mod["Found"]]
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def has_driver(dev_id):
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'''return true if a device is assigned to a driver. False otherwise'''
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return "Driver_str" in devices[dev_id]
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def get_pci_device_details(dev_id):
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'''This function gets additional details for a PCI device'''
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device = {}
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extra_info = check_output(["lspci", "-vmmks", dev_id]).splitlines()
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# parse lspci details
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for line in extra_info:
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if len(line) == 0:
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continue
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name, value = line.decode().split("\t", 1)
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name = name.strip(":") + "_str"
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device[name] = value
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# check for a unix interface name
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device["Interface"] = ""
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for base, dirs, _ in os.walk("/sys/bus/pci/devices/%s/" % dev_id):
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if "net" in dirs:
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device["Interface"] = \
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",".join(os.listdir(os.path.join(base, "net")))
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break
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# check if a port is used for ssh connection
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device["Ssh_if"] = False
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device["Active"] = ""
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return device
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def get_nic_details():
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'''This function populates the "devices" dictionary. The keys used are
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the pci addresses (domain:bus:slot.func). The values are themselves
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dictionaries - one for each NIC.'''
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global devices
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global dpdk_drivers
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# clear any old data
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devices = {}
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# first loop through and read details for all devices
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# request machine readable format, with numeric IDs
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dev = {}
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dev_lines = check_output(["lspci", "-Dvmmn"]).splitlines()
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for dev_line in dev_lines:
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if (len(dev_line) == 0):
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if dev["Class"][0:2] == NETWORK_BASE_CLASS:
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# convert device and vendor ids to numbers, then add to global
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dev["Vendor"] = int(dev["Vendor"], 16)
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dev["Device"] = int(dev["Device"], 16)
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# use dict to make copy of dev
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devices[dev["Slot"]] = dict(dev)
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else:
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name, value = dev_line.decode().split("\t", 1)
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dev[name.rstrip(":")] = value
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# check what is the interface if any for an ssh connection if
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# any to this host, so we can mark it later.
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ssh_if = []
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route = check_output(["ip", "-o", "route"])
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# filter out all lines for 169.254 routes
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route = "\n".join(filter(lambda ln: not ln.startswith("169.254"),
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route.decode().splitlines()))
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rt_info = route.split()
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for i in range(len(rt_info) - 1):
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if rt_info[i] == "dev":
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ssh_if.append(rt_info[i+1])
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# based on the basic info, get extended text details
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for d in devices.keys():
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# get additional info and add it to existing data
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devices[d] = devices[d].copy()
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devices[d].update(get_pci_device_details(d).items())
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for _if in ssh_if:
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if _if in devices[d]["Interface"].split(","):
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devices[d]["Ssh_if"] = True
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devices[d]["Active"] = "*Active*"
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break
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# add igb_uio to list of supporting modules if needed
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if "Module_str" in devices[d]:
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for driver in dpdk_drivers:
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if driver not in devices[d]["Module_str"]:
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devices[d]["Module_str"] = \
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devices[d]["Module_str"] + ",%s" % driver
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else:
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devices[d]["Module_str"] = ",".join(dpdk_drivers)
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# make sure the driver and module strings do not have any duplicates
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if has_driver(d):
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modules = devices[d]["Module_str"].split(",")
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if devices[d]["Driver_str"] in modules:
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modules.remove(devices[d]["Driver_str"])
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devices[d]["Module_str"] = ",".join(modules)
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def get_crypto_details():
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'''This function populates the "devices" dictionary. The keys used are
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the pci addresses (domain:bus:slot.func). The values are themselves
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dictionaries - one for each NIC.'''
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global devices
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global dpdk_drivers
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# clear any old data
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# devices = {}
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# first loop through and read details for all devices
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# request machine readable format, with numeric IDs
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dev = {}
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dev_lines = check_output(["lspci", "-Dvmmn"]).splitlines()
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for dev_line in dev_lines:
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if (len(dev_line) == 0):
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if (dev["Class"][0:2] == CRYPTO_BASE_CLASS):
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# convert device and vendor ids to numbers, then add to global
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dev["Vendor"] = int(dev["Vendor"], 16)
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dev["Device"] = int(dev["Device"], 16)
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# use dict to make copy of dev
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devices[dev["Slot"]] = dict(dev)
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else:
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name, value = dev_line.decode().split("\t", 1)
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dev[name.rstrip(":")] = value
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# based on the basic info, get extended text details
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for d in devices.keys():
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# get additional info and add it to existing data
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devices[d] = devices[d].copy()
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devices[d].update(get_pci_device_details(d).items())
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# add igb_uio to list of supporting modules if needed
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if "Module_str" in devices[d]:
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for driver in dpdk_drivers:
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if driver not in devices[d]["Module_str"]:
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devices[d]["Module_str"] = \
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devices[d]["Module_str"] + ",%s" % driver
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else:
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devices[d]["Module_str"] = ",".join(dpdk_drivers)
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# make sure the driver and module strings do not have any duplicates
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if has_driver(d):
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modules = devices[d]["Module_str"].split(",")
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if devices[d]["Driver_str"] in modules:
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modules.remove(devices[d]["Driver_str"])
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devices[d]["Module_str"] = ",".join(modules)
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def dev_id_from_dev_name(dev_name):
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'''Take a device "name" - a string passed in by user to identify a NIC
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device, and determine the device id - i.e. the domain:bus:slot.func - for
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it, which can then be used to index into the devices array'''
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# check if it's already a suitable index
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if dev_name in devices:
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return dev_name
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# check if it's an index just missing the domain part
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elif "0000:" + dev_name in devices:
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return "0000:" + dev_name
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else:
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# check if it's an interface name, e.g. eth1
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for d in devices.keys():
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if dev_name in devices[d]["Interface"].split(","):
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return devices[d]["Slot"]
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# if nothing else matches - error
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print("Unknown device: %s. "
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"Please specify device in \"bus:slot.func\" format" % dev_name)
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sys.exit(1)
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def unbind_one(dev_id, force):
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'''Unbind the device identified by "dev_id" from its current driver'''
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dev = devices[dev_id]
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if not has_driver(dev_id):
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print("%s %s %s is not currently managed by any driver\n" %
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(dev["Slot"], dev["Device_str"], dev["Interface"]))
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return
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# prevent us disconnecting ourselves
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if dev["Ssh_if"] and not force:
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print("Routing table indicates that interface %s is active. "
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"Skipping unbind" % (dev_id))
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return
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# write to /sys to unbind
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filename = "/sys/bus/pci/drivers/%s/unbind" % dev["Driver_str"]
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try:
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f = open(filename, "a")
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except:
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print("Error: unbind failed for %s - Cannot open %s"
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% (dev_id, filename))
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sys.exit(1)
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f.write(dev_id)
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f.close()
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def bind_one(dev_id, driver, force):
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'''Bind the device given by "dev_id" to the driver "driver". If the device
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is already bound to a different driver, it will be unbound first'''
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dev = devices[dev_id]
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saved_driver = None # used to rollback any unbind in case of failure
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# prevent disconnection of our ssh session
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if dev["Ssh_if"] and not force:
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print("Routing table indicates that interface %s is active. "
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"Not modifying" % (dev_id))
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return
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# unbind any existing drivers we don't want
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if has_driver(dev_id):
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if dev["Driver_str"] == driver:
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print("%s already bound to driver %s, skipping\n"
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% (dev_id, driver))
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return
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else:
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saved_driver = dev["Driver_str"]
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unbind_one(dev_id, force)
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dev["Driver_str"] = "" # clear driver string
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# if we are binding to one of DPDK drivers, add PCI id's to that driver
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if driver in dpdk_drivers:
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filename = "/sys/bus/pci/drivers/%s/new_id" % driver
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try:
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f = open(filename, "w")
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except:
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print("Error: bind failed for %s - Cannot open %s"
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% (dev_id, filename))
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return
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try:
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f.write("%04x %04x" % (dev["Vendor"], dev["Device"]))
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f.close()
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except:
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print("Error: bind failed for %s - Cannot write new PCI ID to "
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"driver %s" % (dev_id, driver))
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return
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# do the bind by writing to /sys
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filename = "/sys/bus/pci/drivers/%s/bind" % driver
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try:
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f = open(filename, "a")
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except:
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print("Error: bind failed for %s - Cannot open %s"
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% (dev_id, filename))
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if saved_driver is not None: # restore any previous driver
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bind_one(dev_id, saved_driver, force)
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return
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try:
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f.write(dev_id)
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f.close()
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except:
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# for some reason, closing dev_id after adding a new PCI ID to new_id
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# results in IOError. however, if the device was successfully bound,
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# we don't care for any errors and can safely ignore IOError
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tmp = get_pci_device_details(dev_id)
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if "Driver_str" in tmp and tmp["Driver_str"] == driver:
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return
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print("Error: bind failed for %s - Cannot bind to driver %s"
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% (dev_id, driver))
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if saved_driver is not None: # restore any previous driver
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bind_one(dev_id, saved_driver, force)
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return
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def unbind_all(dev_list, force=False):
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"""Unbind method, takes a list of device locations"""
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dev_list = map(dev_id_from_dev_name, dev_list)
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for d in dev_list:
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unbind_one(d, force)
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def bind_all(dev_list, driver, force=False):
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"""Bind method, takes a list of device locations"""
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global devices
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dev_list = map(dev_id_from_dev_name, dev_list)
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for d in dev_list:
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bind_one(d, driver, force)
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# when binding devices to a generic driver (i.e. one that doesn't have a
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# PCI ID table), some devices that are not bound to any other driver could
|
|
# be bound even if no one has asked them to. hence, we check the list of
|
|
# drivers again, and see if some of the previously-unbound devices were
|
|
# erroneously bound.
|
|
for d in devices.keys():
|
|
# skip devices that were already bound or that we know should be bound
|
|
if "Driver_str" in devices[d] or d in dev_list:
|
|
continue
|
|
|
|
# update information about this device
|
|
devices[d] = dict(devices[d].items() +
|
|
get_pci_device_details(d).items())
|
|
|
|
# check if updated information indicates that the device was bound
|
|
if "Driver_str" in devices[d]:
|
|
unbind_one(d, force)
|
|
|
|
|
|
def display_devices(title, dev_list, extra_params=None):
|
|
'''Displays to the user the details of a list of devices given in
|
|
"dev_list". The "extra_params" parameter, if given, should contain a string
|
|
with %()s fields in it for replacement by the named fields in each
|
|
device's dictionary.'''
|
|
strings = [] # this holds the strings to print. We sort before printing
|
|
print("\n%s" % title)
|
|
print("="*len(title))
|
|
if len(dev_list) == 0:
|
|
strings.append("<none>")
|
|
else:
|
|
for dev in dev_list:
|
|
if extra_params is not None:
|
|
strings.append("%s '%s' %s" % (dev["Slot"],
|
|
dev["Device_str"], extra_params % dev))
|
|
else:
|
|
strings.append("%s '%s'" % (dev["Slot"], dev["Device_str"]))
|
|
# sort before printing, so that the entries appear in PCI order
|
|
strings.sort()
|
|
print("\n".join(strings)) # print one per line
|
|
|
|
|
|
def show_status():
|
|
'''Function called when the script is passed the "--status" option.
|
|
Displays to the user what devices are bound to the igb_uio driver, the
|
|
kernel driver or to no driver'''
|
|
global dpdk_drivers
|
|
kernel_drv = []
|
|
dpdk_drv = []
|
|
no_drv = []
|
|
|
|
# split our list of network devices into the three categories above
|
|
for d in devices.keys():
|
|
if (NETWORK_BASE_CLASS in devices[d]["Class"]):
|
|
if not has_driver(d):
|
|
no_drv.append(devices[d])
|
|
continue
|
|
if devices[d]["Driver_str"] in dpdk_drivers:
|
|
dpdk_drv.append(devices[d])
|
|
else:
|
|
kernel_drv.append(devices[d])
|
|
|
|
# print each category separately, so we can clearly see what's used by DPDK
|
|
display_devices("Network devices using DPDK-compatible driver", dpdk_drv,
|
|
"drv=%(Driver_str)s unused=%(Module_str)s")
|
|
display_devices("Network devices using kernel driver", kernel_drv,
|
|
"if=%(Interface)s drv=%(Driver_str)s "
|
|
"unused=%(Module_str)s %(Active)s")
|
|
display_devices("Other network devices", no_drv, "unused=%(Module_str)s")
|
|
|
|
# split our list of crypto devices into the three categories above
|
|
kernel_drv = []
|
|
dpdk_drv = []
|
|
no_drv = []
|
|
|
|
for d in devices.keys():
|
|
if (CRYPTO_BASE_CLASS in devices[d]["Class"]):
|
|
if not has_driver(d):
|
|
no_drv.append(devices[d])
|
|
continue
|
|
if devices[d]["Driver_str"] in dpdk_drivers:
|
|
dpdk_drv.append(devices[d])
|
|
else:
|
|
kernel_drv.append(devices[d])
|
|
|
|
display_devices("Crypto devices using DPDK-compatible driver", dpdk_drv,
|
|
"drv=%(Driver_str)s unused=%(Module_str)s")
|
|
display_devices("Crypto devices using kernel driver", kernel_drv,
|
|
"drv=%(Driver_str)s "
|
|
"unused=%(Module_str)s")
|
|
display_devices("Other crypto devices", no_drv, "unused=%(Module_str)s")
|
|
|
|
|
|
def parse_args():
|
|
'''Parses the command-line arguments given by the user and takes the
|
|
appropriate action for each'''
|
|
global b_flag
|
|
global status_flag
|
|
global force_flag
|
|
global args
|
|
if len(sys.argv) <= 1:
|
|
usage()
|
|
sys.exit(0)
|
|
|
|
try:
|
|
opts, args = getopt.getopt(sys.argv[1:], "b:us",
|
|
["help", "usage", "status", "force",
|
|
"bind=", "unbind"])
|
|
except getopt.GetoptError as error:
|
|
print(str(error))
|
|
print("Run '%s --usage' for further information" % sys.argv[0])
|
|
sys.exit(1)
|
|
|
|
for opt, arg in opts:
|
|
if opt == "--help" or opt == "--usage":
|
|
usage()
|
|
sys.exit(0)
|
|
if opt == "--status" or opt == "-s":
|
|
status_flag = True
|
|
if opt == "--force":
|
|
force_flag = True
|
|
if opt == "-b" or opt == "-u" or opt == "--bind" or opt == "--unbind":
|
|
if b_flag is not None:
|
|
print("Error - Only one bind or unbind may be specified\n")
|
|
sys.exit(1)
|
|
if opt == "-u" or opt == "--unbind":
|
|
b_flag = "none"
|
|
else:
|
|
b_flag = arg
|
|
|
|
|
|
def do_arg_actions():
|
|
'''do the actual action requested by the user'''
|
|
global b_flag
|
|
global status_flag
|
|
global force_flag
|
|
global args
|
|
|
|
if b_flag is None and not status_flag:
|
|
print("Error: No action specified for devices."
|
|
"Please give a -b or -u option")
|
|
print("Run '%s --usage' for further information" % sys.argv[0])
|
|
sys.exit(1)
|
|
|
|
if b_flag is not None and len(args) == 0:
|
|
print("Error: No devices specified.")
|
|
print("Run '%s --usage' for further information" % sys.argv[0])
|
|
sys.exit(1)
|
|
|
|
if b_flag == "none" or b_flag == "None":
|
|
unbind_all(args, force_flag)
|
|
elif b_flag is not None:
|
|
bind_all(args, b_flag, force_flag)
|
|
if status_flag:
|
|
if b_flag is not None:
|
|
get_nic_details() # refresh if we have changed anything
|
|
get_crypto_details() # refresh if we have changed anything
|
|
show_status()
|
|
|
|
|
|
def main():
|
|
'''program main function'''
|
|
parse_args()
|
|
check_modules()
|
|
get_nic_details()
|
|
get_crypto_details()
|
|
do_arg_actions()
|
|
|
|
if __name__ == "__main__":
|
|
main()
|