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Merge pull request #895 from GNS3/qemu_more_adapters

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Allow up to 275 adapters for qemu
This commit is contained in:
Jeremy Grossmann 2017-02-17 01:40:41 -08:00 committed by GitHub
commit aee7208f7b
3 changed files with 70 additions and 7 deletions
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27
gns3server/compute/qemu/qemu_vm.py
View File

@ -23,12 +23,13 @@ order to run a QEMU VM.
import sys
import os
import re
import math
import shutil
import subprocess
import shlex
import asyncio
import socket
import gns3server
import subprocess
from gns3server.utils import parse_version
from .qemu_error import QemuError
@ -1446,6 +1447,20 @@ class QemuVM(BaseNode):
# this is a patched Qemu if version is below 1.1.0
patched_qemu = True
# Each 32 PCI device we need to add a PCI bridge with max 9 bridges
pci_devices = 4 + len(self._ethernet_adapters) # 4 PCI devices are use by default by qemu
bridge_id = 0
for bridge_id in range(1, math.floor(pci_devices / 32) + 1):
network_options.extend(["-device", "i82801b11-bridge,id=dmi_pci_bridge{bridge_id}".format(bridge_id=bridge_id)])
network_options.extend(["-device", "pci-bridge,id=pci-bridge{bridge_id},bus=dmi_pci_bridge{bridge_id},chassis_nr=0x1,addr=0x{bridge_id},shpc=off".format(bridge_id=bridge_id)])
if bridge_id > 1:
qemu_version = yield from self.manager.get_qemu_version(self.qemu_path)
if qemu_version and parse_version(qemu_version) < parse_version("2.4.0"):
raise QemuError("Qemu version 2.4 or later is required to run this VM with a large number of network adapters")
pci_device_id = 4 + bridge_id # Bridge consume PCI ports
for adapter_number, adapter in enumerate(self._ethernet_adapters):
mac = int_to_macaddress(macaddress_to_int(self._mac_address) + adapter_number)
@ -1483,8 +1498,14 @@ class QemuVM(BaseNode):
else:
# newer QEMU networking syntax
device_string = "{},mac={}".format(self._adapter_type, mac)
bridge_id = math.floor(pci_device_id / 32)
if bridge_id > 0:
addr = pci_device_id % 32
device_string = "{},bus=pci-bridge{bridge_id},addr=0x{addr:02x}".format(device_string, bridge_id=bridge_id, addr=addr)
pci_device_id += 1
if nio:
network_options.extend(["-device", "{},mac={},netdev=gns3-{}".format(self._adapter_type, mac, adapter_number)])
network_options.extend(["-device", "{},netdev=gns3-{}".format(device_string, adapter_number)])
if isinstance(nio, NIOUDP):
network_options.extend(["-netdev", "socket,id=gns3-{},udp={}:{},localaddr={}:{}".format(adapter_number,
nio.rhost,
@ -1494,7 +1515,7 @@ class QemuVM(BaseNode):
elif isinstance(nio, NIOTAP):
network_options.extend(["-netdev", "tap,id=gns3-{},ifname={},script=no,downscript=no".format(adapter_number, nio.tap_device)])
else:
network_options.extend(["-device", "{},mac={}".format(self._adapter_type, mac)])
network_options.extend(["-device", device_string])
return network_options

6
gns3server/schemas/qemu.py
View File

@ -147,7 +147,7 @@ QEMU_CREATE_SCHEMA = {
"description": "Number of adapters",
"type": ["integer", "null"],
"minimum": 0,
"maximum": 32,
"maximum": 275,
},
"adapter_type": {
"description": "QEMU adapter type",
@ -332,7 +332,7 @@ QEMU_UPDATE_SCHEMA = {
"description": "Number of adapters",
"type": ["integer", "null"],
"minimum": 0,
"maximum": 32,
"maximum": 275,
},
"adapter_type": {
"description": "QEMU adapter type",
@ -520,7 +520,7 @@ QEMU_OBJECT_SCHEMA = {
"description": "Number of adapters",
"type": "integer",
"minimum": 0,
"maximum": 32,
"maximum": 275,
},
"adapter_type": {
"description": "QEMU adapter type",

44
tests/compute/qemu/test_qemu_vm.py
View File

@ -588,7 +588,7 @@ def test_build_command_two_adapters_mac_address(vm, loop, fake_qemu_binary, port
vm.adapters = 2
vm.mac_address = "00:00:ab:0e:0f:09"
mac_0 = vm._mac_address
mac_1 = int_to_macaddress(macaddress_to_int(vm._mac_address))
mac_1 = int_to_macaddress(macaddress_to_int(vm._mac_address) + 1)
assert mac_0[:8] == "00:00:ab"
with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()) as process:
cmd = loop.run_until_complete(asyncio.async(vm._build_command()))
@ -605,7 +605,49 @@ def test_build_command_two_adapters_mac_address(vm, loop, fake_qemu_binary, port
assert "e1000,mac={}".format(mac_1) in cmd
def test_build_command_large_number_of_adapters(vm, loop, fake_qemu_binary, port_manager):
"""
When we have more than 28 interface we need to add a pci bridge for
additionnal interfaces
"""
# It's supported only with Qemu 2.4 and later
vm.manager.get_qemu_version = AsyncioMagicMock(return_value="2.4.0")
vm.adapters = 100
vm.mac_address = "00:00:ab:0e:0f:09"
mac_0 = vm._mac_address
mac_1 = int_to_macaddress(macaddress_to_int(vm._mac_address) + 1)
assert mac_0[:8] == "00:00:ab"
with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()) as process:
cmd = loop.run_until_complete(asyncio.async(vm._build_command()))
assert "e1000,mac={}".format(mac_0) in cmd
assert "e1000,mac={}".format(mac_1) in cmd
assert "pci-bridge,id=pci-bridge0,bus=dmi_pci_bridge0,chassis_nr=0x1,addr=0x0,shpc=off" not in cmd
assert "pci-bridge,id=pci-bridge1,bus=dmi_pci_bridge1,chassis_nr=0x1,addr=0x1,shpc=off" in cmd
assert "pci-bridge,id=pci-bridge2,bus=dmi_pci_bridge2,chassis_nr=0x1,addr=0x2,shpc=off" in cmd
assert "i82801b11-bridge,id=dmi_pci_bridge1" in cmd
mac_29 = int_to_macaddress(macaddress_to_int(vm._mac_address) + 29)
assert "e1000,mac={},bus=pci-bridge1,addr=0x04".format(mac_29) in cmd
mac_30 = int_to_macaddress(macaddress_to_int(vm._mac_address) + 30)
assert "e1000,mac={},bus=pci-bridge1,addr=0x05".format(mac_30) in cmd
mac_74 = int_to_macaddress(macaddress_to_int(vm._mac_address) + 74)
assert "e1000,mac={},bus=pci-bridge2,addr=0x11".format(mac_74) in cmd
# Qemu < 2.4 doesn't support large number of adapters
vm.manager.get_qemu_version = AsyncioMagicMock(return_value="2.0.0")
with pytest.raises(QemuError):
with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()) as process:
cmd = loop.run_until_complete(asyncio.async(vm._build_command()))
vm.adapters = 5
with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()) as process:
cmd = loop.run_until_complete(asyncio.async(vm._build_command()))
# Windows accept this kind of mistake
@pytest.mark.skipif(sys.platform.startswith("win"), reason="Not supported on Windows")
def test_build_command_with_invalid_options(vm, loop, fake_qemu_binary):