# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1237286447 0
# Node ID f81467ad13563d81f550be69f9f744b940c3916b
# Parent 57327f3334b4fd38389ae4323ace60cf02b5b2bb
xend: Accept udev events and update physical resource information
When a udev event is received, udevevent.py parses the udev data and
tells XendNode.py to update the physical resource information.
This patch also add a boolean parameter 'xend-udev-event-server', to
let users indicate whether we should enable this function or not.
Signed-off-by: Yosuke Iwamatsu <y-iwamatsu@xxxxxxxxxxxxx>
---
tools/examples/xend-config.sxp | 1
tools/python/xen/xend/XendNode.py | 91 ++++++++++++++++++++++++++++--
tools/python/xen/xend/XendOptions.py | 7 ++
tools/python/xen/xend/server/SrvDaemon.py | 2
tools/python/xen/xend/server/udevevent.py | 68 ++++++++++++++++++++++
5 files changed, 165 insertions(+), 4 deletions(-)
diff -r 57327f3334b4 -r f81467ad1356 tools/examples/xend-config.sxp
--- a/tools/examples/xend-config.sxp Tue Mar 17 10:38:06 2009 +0000
+++ b/tools/examples/xend-config.sxp Tue Mar 17 10:40:47 2009 +0000
@@ -64,6 +64,7 @@
#(xend-relocation-server no)
(xend-relocation-server yes)
#(xend-relocation-ssl-server no)
+#(xend-udev-event-server no)
#(xend-unix-path /var/lib/xend/xend-socket)
diff -r 57327f3334b4 -r f81467ad1356 tools/python/xen/xend/XendNode.py
--- a/tools/python/xen/xend/XendNode.py Tue Mar 17 10:38:06 2009 +0000
+++ b/tools/python/xen/xend/XendNode.py Tue Mar 17 10:40:47 2009 +0000
@@ -146,6 +146,18 @@ class XendNode:
self.srs = {}
+ self._init_networks()
+ self._init_PIFs()
+
+ self._init_SRs()
+ self._init_PBDs()
+
+ self._init_PPCIs()
+
+ self._init_PSCSIs()
+
+
+ def _init_networks(self):
# Initialise networks
# First configure ones off disk
saved_networks = self.state_store.load_state('network')
@@ -179,6 +191,7 @@ class XendNode:
if unconfigured_bridge != 'tmpbridge':
XendNetwork.create_phy(unconfigured_bridge)
+ def _init_PIFs(self):
# Initialise PIFs
# First configure ones off disk
saved_pifs = self.state_store.load_state('pif')
@@ -221,7 +234,8 @@ class XendNode:
log.debug("Cannot find network for bridge %s "
"when configuring PIF %s",
(bridge_name, name))
-
+
+ def _init_SRs(self):
# initialise storage
saved_srs = self.state_store.load_state('sr')
if saved_srs:
@@ -240,6 +254,7 @@ class XendNode:
qcow_sr_uuid = uuid.createString()
self.srs[qcow_sr_uuid] = XendQCoWStorageRepo(qcow_sr_uuid)
+ def _init_PBDs(self):
saved_pbds = self.state_store.load_state('pbd')
if saved_pbds:
for pbd_uuid, pbd_cfg in saved_pbds.items():
@@ -248,8 +263,7 @@ class XendNode:
except CreateUnspecifiedAttributeError:
log.warn("Error recreating PBD %s", pbd_uuid)
-
- # Initialise PPCIs
+ def _init_PPCIs(self):
saved_ppcis = self.state_store.load_state('ppci')
saved_ppci_table = {}
if saved_ppcis:
@@ -282,7 +296,7 @@ class XendNode:
ppci_uuid = saved_ppci_table.get(pci_dev.name, uuid.createString())
XendPPCI(ppci_uuid, ppci_record)
-
+ def _init_PSCSIs(self):
# Initialise PSCSIs
saved_pscsis = self.state_store.load_state('pscsi')
saved_pscsi_table = {}
@@ -299,6 +313,75 @@ class XendNode:
pscsi_uuid = saved_pscsi_table.get(pscsi_record['scsi_id'],
uuid.createString())
XendPSCSI(pscsi_uuid, pscsi_record)
+
+
+ def add_network(self, interface):
+ # TODO
+ log.debug("add_network(): Not implemented.")
+
+
+ def remove_network(self, interface):
+ # TODO
+ log.debug("remove_network(): Not implemented.")
+
+
+ def add_PPCI(self, pci_name):
+ # Update lspci info
+ PciUtil.create_lspci_info()
+
+ # Initialise the PPCI
+ saved_ppcis = self.state_store.load_state('ppci')
+ saved_ppci_table = {}
+ if saved_ppcis:
+ for ppci_uuid, ppci_record in saved_ppcis.items():
+ try:
+ saved_ppci_table[ppci_record['name']] = ppci_uuid
+ except KeyError:
+ pass
+
+ (domain, bus, slot, func) = PciUtil.parse_pci_name(pci_name)
+ pci_dev = PciUtil.PciDevice(domain, bus, slot, func)
+ ppci_record = {
+ 'domain': pci_dev.domain,
+ 'bus': pci_dev.bus,
+ 'slot': pci_dev.slot,
+ 'func': pci_dev.func,
+ 'vendor_id': pci_dev.vendor,
+ 'vendor_name': pci_dev.vendorname,
+ 'device_id': pci_dev.device,
+ 'device_name': pci_dev.devicename,
+ 'revision_id': pci_dev.revision,
+ 'class_code': pci_dev.classcode,
+ 'class_name': pci_dev.classname,
+ 'subsystem_vendor_id': pci_dev.subvendor,
+ 'subsystem_vendor_name': pci_dev.subvendorname,
+ 'subsystem_id': pci_dev.subdevice,
+ 'subsystem_name': pci_dev.subdevicename,
+ 'driver': pci_dev.driver
+ }
+ # If saved uuid exists, use it. Otherwise create one.
+ ppci_uuid = saved_ppci_table.get(pci_dev.name, uuid.createString())
+ XendPPCI(ppci_uuid, ppci_record)
+
+
+ def remove_PPCI(self, pci_name):
+ # Update lspci info
+ PciUtil.create_lspci_info()
+
+ # Remove the PPCI
+ (domain, bus, slot, func) = PciUtil.parse_pci_name(pci_name)
+ ppci_ref = XendPPCI.get_by_sbdf(domain, bus, slot, func)
+ XendAPIStore.get(ppci_ref, "PPCI").destroy()
+
+
+ def add_PSCSI(self):
+ # TODO
+ log.debug("add_network(): Not implemented.")
+
+
+ def remove_PSCSI(self):
+ # TODO
+ log.debug("add_network(): Not implemented.")
## def network_destroy(self, net_uuid):
diff -r 57327f3334b4 -r f81467ad1356 tools/python/xen/xend/XendOptions.py
--- a/tools/python/xen/xend/XendOptions.py Tue Mar 17 10:38:06 2009 +0000
+++ b/tools/python/xen/xend/XendOptions.py Tue Mar 17 10:40:47 2009 +0000
@@ -75,6 +75,9 @@ class XendOptions:
"""Default for the flag indicating whether xend should run a ssl
relocation server."""
xend_relocation_ssl_server_default = 'no'
+ """Default for the flag indicating whether xend should run a udev event
server."""
+ xend_udev_event_server_default = 'no'
+
"""Default interface address the xend relocation server listens at. """
xend_relocation_address_default = ''
@@ -215,6 +218,10 @@ class XendOptions:
def get_xend_relocation_server_ssl_cert_file(self):
return self.get_config_string("xend-relocation-server-ssl-cert-file")
+
+ def get_xend_udev_event_server(self):
+ return self.get_config_bool("xend-udev-event-server",
+ self.xend_udev_event_server_default)
def get_xend_port(self):
"""Get the port xend listens at for its HTTP interface.
diff -r 57327f3334b4 -r f81467ad1356 tools/python/xen/xend/server/SrvDaemon.py
--- a/tools/python/xen/xend/server/SrvDaemon.py Tue Mar 17 10:38:06 2009 +0000
+++ b/tools/python/xen/xend/server/SrvDaemon.py Tue Mar 17 10:40:47 2009 +0000
@@ -24,6 +24,7 @@ from xen.util import mkdir
from xen.util import mkdir
import relocate
+import udevevent
import SrvServer
from params import *
@@ -336,6 +337,7 @@ class Daemon:
del xc
relocate.listenRelocation()
+ udevevent.listenUdevEvent()
servers = SrvServer.create()
servers.start(status)
del servers
diff -r 57327f3334b4 -r f81467ad1356 tools/python/xen/xend/server/udevevent.py
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/python/xen/xend/server/udevevent.py Tue Mar 17 10:40:47 2009 +0000
@@ -0,0 +1,68 @@
+import socket
+
+from xen.web import protocol, unix
+
+from xen.xend.XendLogging import log
+from xen.xend import XendNode
+from xen.xend import XendOptions
+
+UDEV_EVENT_PATH = '\0/org/xen/xend/udev_event'
+
+class UdevEventProtocol(protocol.Protocol):
+
+ def __init__(self):
+ protocol.Protocol.__init__(self)
+
+ def dataReceived(self, data):
+ udev_event = {}
+ for entry in data.split('\0'):
+ try:
+ opt, val = entry.split("=")
+ udev_event[opt] = val
+ except (TypeError, ValueError):
+ pass
+ if udev_event.get('ACTION', None) is None:
+ log.warn("Invalid udev event received")
+ return
+
+ log.debug("udev event received: %s", udev_event)
+
+ self._process_event(udev_event)
+
+ def _process_event(self, udev_event):
+ try:
+ if (udev_event.get('SUBSYSTEM', None) == 'pci'):
+ pci_name = udev_event.get('PCI_SLOT_NAME', None)
+ if (udev_event['ACTION'] == 'add'):
+ log.info("Adding pci device %s", pci_name)
+ XendNode.instance().add_PPCI(pci_name)
+ elif (udev_event['ACTION'] == 'remove'):
+ log.info("Removing pci device %s", pci_name)
+ XendNode.instance().remove_PPCI(pci_name)
+
+ elif (udev_event.get('SUBSYSTEMS', None) == 'scsi'):
+ if (udev_event['ACTION'] == 'add'):
+ log.info("Adding scsi device")
+ XendNode.instance().add_PSCSI()
+ elif (udev_event['ACTION'] == 'remove'):
+ log.info("Removing scci device")
+ XendNode.instance().remove_PSCSI()
+
+ elif (udev_event.get('SUBSYSTEM', None) == 'net'):
+ interface = udev_event.get('INTERFACE', None)
+ if (udev_event['ACTION'] == 'add'):
+ log.info("Adding net device %s", interface)
+ XendNode.instance().add_network(interface)
+ elif (udev_event['ACTION'] == 'remove'):
+ log.info("Removing net device %s", interface)
+ XendNode.instance().remove_network(interface)
+
+ except Exception, e:
+ log.warn("error while processing udev event(): %s" % str(e))
+
+
+def listenUdevEvent():
+ xoptions = XendOptions.instance()
+ if xoptions.get_xend_udev_event_server():
+ unix.UnixDgramListener(UDEV_EVENT_PATH, UdevEventProtocol)
+
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