d84179e42f
* Remove unused python imports These changes have been auto-generated with: pip3 install isort autoflake isort -rc -sl . autoflake --remove-all-unused-imports -i -r . isort -rc -m 3 . Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org> * python: remove redundant parenthesis Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>
139 lines
4.9 KiB
Python
139 lines
4.9 KiB
Python
# Copyright 2017-present Barefoot Networks, Inc.
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# Copyright 2017-present Open Networking Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import os
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import tempfile
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from time import sleep
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from mininet.log import debug, error, info
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from mininet.moduledeps import pathCheck
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from mininet.node import Switch
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from netstat import check_listening_on_port
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from p4_mininet import SWITCH_START_TIMEOUT, P4Switch
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class P4RuntimeSwitch(P4Switch):
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"BMv2 switch with gRPC support"
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next_grpc_port = 50051
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next_thrift_port = 9090
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def __init__(self, name, sw_path = None, json_path = None,
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grpc_port = None,
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thrift_port = None,
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pcap_dump = False,
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log_console = False,
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verbose = False,
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device_id = None,
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enable_debugger = False,
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log_file = None,
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**kwargs):
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Switch.__init__(self, name, **kwargs)
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assert (sw_path)
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self.sw_path = sw_path
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# make sure that the provided sw_path is valid
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pathCheck(sw_path)
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if json_path is not None:
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# make sure that the provided JSON file exists
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if not os.path.isfile(json_path):
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error("Invalid JSON file: {}\n".format(json_path))
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exit(1)
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self.json_path = json_path
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else:
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self.json_path = None
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if grpc_port is not None:
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self.grpc_port = grpc_port
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else:
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self.grpc_port = P4RuntimeSwitch.next_grpc_port
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P4RuntimeSwitch.next_grpc_port += 1
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if thrift_port is not None:
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self.thrift_port = thrift_port
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else:
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self.thrift_port = P4RuntimeSwitch.next_thrift_port
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P4RuntimeSwitch.next_thrift_port += 1
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if check_listening_on_port(self.grpc_port):
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error('%s cannot bind port %d because it is bound by another process\n' % (self.name, self.grpc_port))
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exit(1)
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self.verbose = verbose
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logfile = "/tmp/p4s.{}.log".format(self.name)
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self.output = open(logfile, 'w')
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self.pcap_dump = pcap_dump
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self.enable_debugger = enable_debugger
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self.log_console = log_console
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if log_file is not None:
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self.log_file = log_file
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else:
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self.log_file = "/tmp/p4s.{}.log".format(self.name)
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if device_id is not None:
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self.device_id = device_id
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P4Switch.device_id = max(P4Switch.device_id, device_id)
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else:
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self.device_id = P4Switch.device_id
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P4Switch.device_id += 1
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self.nanomsg = "ipc:///tmp/bm-{}-log.ipc".format(self.device_id)
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def check_switch_started(self, pid):
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for _ in range(SWITCH_START_TIMEOUT * 2):
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if not os.path.exists(os.path.join("/proc", str(pid))):
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return False
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if check_listening_on_port(self.grpc_port):
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return True
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sleep(0.5)
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def start(self, controllers):
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info("Starting P4 switch {}.\n".format(self.name))
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args = [self.sw_path]
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for port, intf in list(self.intfs.items()):
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if not intf.IP():
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args.extend(['-i', str(port) + "@" + intf.name])
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if self.pcap_dump:
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args.append("--pcap %s" % self.pcap_dump)
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if self.nanomsg:
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args.extend(['--nanolog', self.nanomsg])
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args.extend(['--device-id', str(self.device_id)])
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P4Switch.device_id += 1
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if self.json_path:
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args.append(self.json_path)
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else:
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args.append("--no-p4")
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if self.enable_debugger:
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args.append("--debugger")
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if self.log_console:
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args.append("--log-console")
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if self.thrift_port:
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args.append('--thrift-port ' + str(self.thrift_port))
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if self.grpc_port:
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args.append("-- --grpc-server-addr 0.0.0.0:" + str(self.grpc_port))
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cmd = ' '.join(args)
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info(cmd + "\n")
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pid = None
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with tempfile.NamedTemporaryFile() as f:
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self.cmd(cmd + ' >' + self.log_file + ' 2>&1 & echo $! >> ' + f.name)
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pid = int(f.read())
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debug("P4 switch {} PID is {}.\n".format(self.name, pid))
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if not self.check_switch_started(pid):
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error("P4 switch {} did not start correctly.\n".format(self.name))
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exit(1)
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info("P4 switch {} has been started.\n".format(self.name))
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