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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] New XendNetwork and XendPIF classes, for implementing the Xen-API network and
# HG changeset patch
# User Ewan Mellor <ewan@xxxxxxxxxxxxx>
# Date 1167058056 0
# Node ID 362233086f6618b54615b6ec4cd39837973d4ba1
# Parent ae3f3dd40df45bbaf4619679023ba354ac470bc2
New XendNetwork and XendPIF classes, for implementing the Xen-API network and
PIF classes.
By Alastair Tse <atse@xxxxxxxxxxxxx>.
Signed-off-by: Ewan Mellor <ewan@xxxxxxxxxxxxx>
---
tools/python/xen/xend/XendNetwork.py | 119 ++++++++++++++++++++++++++
tools/python/xen/xend/XendPIF.py | 157 +++++++++++++++++++++++++++++++++++
2 files changed, 276 insertions(+)
diff -r ae3f3dd40df4 -r 362233086f66 tools/python/xen/xend/XendNetwork.py
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/python/xen/xend/XendNetwork.py Mon Dec 25 14:47:36 2006 +0000
@@ -0,0 +1,119 @@
+#============================================================================
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of version 2.1 of the GNU Lesser General Public
+# License as published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#============================================================================
+# Copyright (C) 2004, 2005 Mike Wray <mike.wray@xxxxxx>
+# Copyright (c) 2006 Xensource Inc.
+#============================================================================
+
+import os
+import commands
+import re
+import struct
+import socket
+
+from xen.xend.XendRoot import instance as xendroot
+
+IP_ROUTE_RE = r'^default via ([\d\.]+) dev (\w+)'
+
+def linux_get_default_network():
+ """Returns the network details of the host."""
+
+ ip_cmd = '/sbin/ip route'
+ rc, output = commands.getstatusoutput(ip_cmd)
+ default_route = None
+ default_dev = None
+ default_netmask = None
+ if rc == 0:
+ # find default route/device
+ for line in output.split('\n'):
+ is_default = re.search(IP_ROUTE_RE, line)
+ if is_default:
+ default_route = is_default.group(1)
+ default_dev = is_default.group(2)
+
+ # find network address and network mask
+ if default_dev:
+ dev_re = r'^([\d\.]+)/(\d+) dev %s' % default_dev
+ for line in output.split('\n'):
+ is_dev = re.search(dev_re, line)
+ if is_dev:
+ # convert integer netmask to string representation
+ netmask = 0xffffffff ^ (2**(32-int(is_dev.group(2))) - 1)
+ packed = struct.pack('!I', netmask)
+ default_netmask = socket.inet_ntoa(packed)
+
+ return (default_route, default_netmask)
+
+
+class XendNetwork:
+ def __init__(self, uuid, name, description, gateway, netmask):
+ self.uuid = uuid
+ self.name_label = name
+ self.name_description = description
+ self.default_gateway = gateway
+ self.default_netmask = netmask
+ self.vifs = {}
+ self.pifs = {}
+
+ def get_name_label(self):
+ return self.name_label
+
+ def set_name_label(self, new_name):
+ self.name_label = new_name
+
+ def get_name_description(self):
+ return self.name_description
+
+ def set_name_description(self, new_desc):
+ self.name_description = new_desc
+
+ def get_default_gateway(self):
+ return self.default_gateway
+
+ def set_default_gateway(self, new_gateway):
+ if re.search('^\d+\.\d+\.\d+\.\d+$', new_gateway):
+ self.default_gateway = new_gateway
+
+ def get_default_netmask(self):
+ return self.default_netmask
+
+ def set_default_netmask(self, new_netmask):
+ if re.search('^\d+\.\d+\.\d+\.\d+$', new_netmask):
+ self.default_netmask = new_netmask
+
+ def add_pif(self, pif):
+ self.pifs[pif.get_uuid()] = pif
+
+ def remove_pif(self, pif_uuid):
+ if pif_uuid in self.pifs:
+ del self.pifs[pif_uuid]
+
+ def add_vif(self, vif):
+ self.vifs[vif.get_uuid()] = vif
+
+ def remove_vif(self, vif_uuid):
+ if vif_uuid in self.vifs:
+ del self.vifs[vif_uuid]
+
+ def get_record(self):
+ return {
+ 'uuid': self.uuid,
+ 'name_label': self.name_label,
+ 'name_description': self.name_description,
+ 'default_gateway': self.default_gateway,
+ 'default_netmask': self.default_netmask,
+ 'VIFs': self.vifs.keys(),
+ 'PIFs': self.pifs.keys()
+ }
+
diff -r ae3f3dd40df4 -r 362233086f66 tools/python/xen/xend/XendPIF.py
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/python/xen/xend/XendPIF.py Mon Dec 25 14:47:36 2006 +0000
@@ -0,0 +1,157 @@
+#============================================================================
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of version 2.1 of the GNU Lesser General Public
+# License as published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#============================================================================
+# Copyright (C) 2004, 2005 Mike Wray <mike.wray@xxxxxx>
+# Copyright (c) 2006 Xensource Inc.
+#============================================================================
+
+import os
+import commands
+import re
+import socket
+
+from xen.xend.XendRoot import instance as xendroot
+from xen.xend.XendLogging import log
+
+MAC_RE = ':'.join(['[0-9a-f]{2}'] * 6)
+IP_IFACE_RE = r'^\d+: (\w+):.*mtu (\d+) .* link/\w+ ([0-9a-f:]+)'
+
+def linux_phy_to_virt(pif_name):
+ return 'eth' + re.sub(r'^[a-z]+', '', pif_name)
+
+def linux_get_phy_ifaces():
+ """Returns a list of physical interfaces.
+
+ Identifies PIFs as those that have a interface name starting with 'p'
+ and have the fake 'fe:ff:ff:ff:ff:ff' MAC address.
+
+ See /etc/xen/scripts/network-bridge for how the devices are renamed.
+
+ @rtype: array of 3-element tuple (name, mtu, mac)
+ """
+
+ ip_cmd = '/sbin/ip -o link show'
+ rc, output = commands.getstatusoutput(ip_cmd)
+ ifaces = {}
+ phy_ifaces = []
+ if rc == 0:
+ # parse all interfaces into (name, mtu, mac)
+ for line in output.split('\n'):
+ has_if = re.search(IP_IFACE_RE, line)
+ if has_if:
+ ifaces[has_if.group(1)] = has_if.groups()
+
+ # resolve pifs' mac addresses
+ for name, mtu, mac in ifaces.values():
+ if name[0] == 'p' and mac == 'fe:ff:ff:ff:ff:ff':
+ bridged_ifname = linux_phy_to_virt(name)
+ bridged_if = ifaces.get(bridged_ifname)
+ if bridged_if:
+ bridged_mac = bridged_if[2]
+ phy_ifaces.append((name, int(mtu), bridged_mac))
+
+ return phy_ifaces
+
+def linux_set_mac(iface, mac):
+ if not re.search(MAC_RE, mac):
+ return False
+
+ ip_mac_cmd = '/sbin/ip link set %s addr %s' % \
+ (linux_phy_to_virt(iface), mac)
+ rc, output = commands.getstatusoutput(ip_mac_cmd)
+ if rc == 0:
+ return True
+
+ return False
+
+def linux_set_mtu(iface, mtu):
+ try:
+ ip_mtu_cmd = '/sbin/ip link set %s mtu %d' % \
+ (linux_phy_to_virt(iface), int(mtu))
+ rc, output = commands.getstatusoutput(ip_mtu_cmd)
+ if rc == 0:
+ return True
+ return False
+ except ValueError:
+ return False
+
+def same_dir_rename(old_path, new_path):
+ """Ensure that the old_path and new_path refer to files in the same
+ directory."""
+ old_abs = os.path.normpath(old_path)
+ new_abs = os.path.normpath(new_path)
+ if os.path.dirname(old_abs) == os.path.dirname(new_abs):
+ os.rename(old_abs, new_abs)
+ else:
+ log.warning("Unable to ensure name is new name is safe: %s" % new_abs)
+
+
+class XendPIF:
+ """Representation of a Physical Network Interface."""
+
+ def __init__(self, uuid, name, mtu, mac):
+ self.uuid = uuid
+ self.name = name
+ self.mac = mac
+ self.mtu = mtu
+ self.vlan = ''
+ self.network = None
+
+ def set_name(self, new_name):
+ self.name = new_name
+
+ def get_name(self):
+ return self.name
+
+ def get_uuid(self):
+ return self.uuid
+
+ def get_mac(self):
+ return self.mac
+
+ def get_vlan(self):
+ return self.vlan
+
+ def set_mac(self, new_mac):
+ success = linux_set_mac(new_mac)
+ if success:
+ self.mac = new_mac
+ return success
+
+ def set_mtu(self, new_mtu):
+ success = linux_set_mtu(new_mtu)
+ if success:
+ self.mtu = new_mtu
+ return success
+
+ def get_io_read_kbs(self):
+ return 0.0
+
+ def get_io_write_kbs(self):
+ return 0.0
+
+ def get_record(self):
+ if self.network:
+ network_uuid = self.network.get_uuid()
+ else:
+ network_uuid = None
+
+ return {'name': self.name,
+ 'MAC': self.mac,
+ 'MTU': self.mtu,
+ 'VLAN': self.vlan,
+ 'network': network_uuid,
+ 'io_read_kbs': self.get_io_read_kbs(),
+ 'io_write_kbs': self.get_io_write_kbs()}
+
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