def create_phy(self, network_uuid, device, MAC, MTU):
"""
Called when a new physical PIF is found
Could be a VLAN...
"""
# Create new uuids
pif_uuid = genuuid.createString()
metrics_uuid = genuuid.createString()
# Create instances
metrics = XendPIFMetrics(metrics_uuid, pif_uuid)
# Is this a VLAN?
VLANdot = device.split(".")
VLANcolon = device.split(":")
if len(VLANdot) > 1:
VLAN = VLANdot[1]
device = VLANdot[0]
elif len(VLANcolon) > 1:
VLAN = VLANcolon[1]
device = VLANcolon[0]
else:
VLAN = -1
record = {"network": network_uuid, "device": device, "MAC": MAC, "MTU": MTU, "VLAN": VLAN}
pif = XendPIF(record, pif_uuid, metrics_uuid)
return pif_uuid
def create_phy(self, network_uuid, device, MAC, MTU):
"""
Called when a new physical PIF is found
Could be a VLAN...
"""
# Create new uuids
pif_uuid = genuuid.createString()
metrics_uuid = genuuid.createString()
# Create instances
metrics = XendPIFMetrics(metrics_uuid, pif_uuid)
# Is this a VLAN?
VLANdot = device.split(".")
VLANcolon = device.split(":")
if len(VLANdot) > 1:
VLAN = VLANdot[1]
device = VLANdot[0]
elif len(VLANcolon) > 1:
VLAN = VLANcolon[1]
device = VLANcolon[0]
else:
VLAN = -1
record = {
'network': network_uuid,
'device': device,
'MAC': MAC,
'MTU': MTU,
'VLAN': VLAN
}
pif = XendPIF(record, pif_uuid, metrics_uuid)
return pif_uuid
def create_VLAN(self, device, network_uuid, host_ref, vlan):
"""Exposed via API - create a new VLAN from existing VIF"""
ifs = [name for name, _, _ in linux_get_phy_ifaces()]
vlan = int(vlan)
# Check VLAN tag is valid
if vlan < 0 or vlan >= 4096:
raise VLANTagInvalid(vlan)
# Check device exists
if device not in ifs:
raise InvalidDeviceError(device)
# Check VLAN doesn't already exist
if "%s.%d" % (device, vlan) in ifs:
raise DeviceExistsError("%s.%d" % (device, vlan))
# Check network ref is valid
from XendNetwork import XendNetwork
if network_uuid not in XendNetwork.get_all():
raise InvalidHandleError("Network", network_uuid)
# Check host_ref is this host
import XendNode
if host_ref != XendNode.instance().get_uuid():
raise InvalidHandleError("Host", host_ref)
# Create the VLAN
_create_VLAN(device, vlan)
# Create new uuids
pif_uuid = genuuid.createString()
metrics_uuid = genuuid.createString()
# Create the record
record = {
"device": device,
"MAC": linux_get_mac("%s.%d" % (device, vlan)),
"MTU": linux_get_mtu("%s.%d" % (device, vlan)),
"network": network_uuid,
"VLAN": vlan,
}
# Create instances
metrics = XendPIFMetrics(metrics_uuid, pif_uuid)
pif = XendPIF(record, pif_uuid, metrics_uuid)
# Not sure if they should be created plugged or not...
pif.plug()
XendNode.instance().save_PIFs()
return pif_uuid
def create_VLAN(self, device, network_uuid, host_ref, vlan):
"""Exposed via API - create a new VLAN from existing VIF"""
ifs = [name for name, _, _ in linux_get_phy_ifaces()]
vlan = int(vlan)
# Check VLAN tag is valid
if vlan < 0 or vlan >= 4096:
raise VLANTagInvalid(vlan)
# Check device exists
if device not in ifs:
raise InvalidDeviceError(device)
# Check VLAN doesn't already exist
if "%s.%d" % (device, vlan) in ifs:
raise DeviceExistsError("%s.%d" % (device, vlan))
# Check network ref is valid
from XendNetwork import XendNetwork
if network_uuid not in XendNetwork.get_all():
raise InvalidHandleError("Network", network_uuid)
# Check host_ref is this host
import XendNode
if host_ref != XendNode.instance().get_uuid():
raise InvalidHandleError("Host", host_ref)
# Create the VLAN
_create_VLAN(device, vlan)
# Create new uuids
pif_uuid = genuuid.createString()
metrics_uuid = genuuid.createString()
# Create the record
record = {
"device": device,
"MAC": '',
"MTU": '',
"network": network_uuid,
"VLAN": vlan
}
# Create instances
metrics = XendPIFMetrics(metrics_uuid, pif_uuid)
pif = XendPIF(record, pif_uuid, metrics_uuid)
# Not sure if they should be created plugged or not...
pif.plug()
XendNode.instance().save_PIFs()
return pif_uuid
def __init__(self, maxpolicies):
""" Create a management class for managing the system's
policies.
@param maxpolicies: The max. number of policies allowed
on the system (currently '1')
"""
self.maxpolicies = maxpolicies
self.policies = {}
self.xsobjs = {}
act_pol_name = self.get_hv_loaded_policy_name()
initialize()
ref = uuid.createString()
try:
self.xsobjs[ref] = ACMPolicy(name=act_pol_name, ref=ref)
self.policies[ref] = (act_pol_name, xsconstants.ACM_POLICY_ID)
except Exception, e:
log.error("Could not find XML representation of policy '%s': "
"%s" % (act_pol_name, e))
rc, errors, acmpol_def = ACMPolicy.force_default_policy()
if rc == xsconstants.XSERR_SUCCESS:
self.xsobjs[ref] = acmpol_def
self.policies[ref] = (acmpol_def.get_name(),
xsconstants.ACM_POLICY_ID)
log.info("Switched to DEFAULT policy.")
def __init__(self, maxpolicies):
""" Create a management class for managing the system's
policies.
@param maxpolicies: The max. number of policies allowed
on the system (currently '1')
"""
self.maxpolicies = maxpolicies
self.policies = {}
self.xsobjs = {}
act_pol_name = self.get_hv_loaded_policy_name()
initialize()
ref = uuid.createString()
try:
self.xsobjs[ref] = ACMPolicy(name=act_pol_name, ref=ref)
self.policies[ref] = (act_pol_name, xsconstants.ACM_POLICY_ID)
except Exception, e:
log.error("Could not find XML representation of policy '%s': "
"%s" % (act_pol_name,e))
rc, errors, acmpol_def = ACMPolicy.force_default_policy()
if rc == xsconstants.XSERR_SUCCESS:
self.xsobjs[ref] = acmpol_def
self.policies[ref] = (acmpol_def.get_name(),
xsconstants.ACM_POLICY_ID)
log.info("Switched to DEFAULT policy.")
def create_task(func, args, func_name, return_type, label, session):
"""Creates a new Task and registers it with the XendTaskManager.
@param func: callable object XMLRPC method
@type func: callable object
@param args: tuple or list of arguments
@type args: tuple or list
@param func_name: XMLRPC method name, so we can estimate the progress
@type func_name: string
@return: Task UUID
@rtype: string.
"""
task_uuid = uuid.createString()
try:
tasks_lock.acquire()
task = XendTask(task_uuid, func, args, func_name, return_type, label,
'', session)
tasks[task_uuid] = task
finally:
tasks_lock.release()
task.start()
return task_uuid
def create_task(func, args, func_name, return_type, label, session):
"""Creates a new Task and registers it with the XendTaskManager.
@param func: callable object XMLRPC method
@type func: callable object
@param args: tuple or list of arguments
@type args: tuple or list
@param func_name: XMLRPC method name, so we can estimate the progress
@type func_name: string
@return: Task UUID
@rtype: string.
"""
task_uuid = uuid.createString()
try:
tasks_lock.acquire()
task = XendTask(task_uuid, func, args, func_name, return_type, label,
'', session)
tasks[task_uuid] = task
finally:
tasks_lock.release()
task.start()
return task_uuid
def recreate_active_pools(cls):
""" Read active pool config from hypervisor and create pool instances.
- Query pool ids and assigned CPUs from hypervisor.
- Query additional information for any pool from xenstore.
If an entry for a pool id is missing in xenstore, it will be
recreated with a new uuid and generic name (this is an error case)
- Create an XendCPUPool instance for any pool id
Function have to be called after recreation of managed pools.
"""
log.debug('recreate_active_pools')
for pool_rec in xc.cpupool_getinfo():
pool = pool_rec['cpupool']
# read pool data from xenstore
path = XS_POOLROOT + "%s/" % pool
uuid = xstransact.Read(path, 'uuid')
if not uuid:
# xenstore entry missing / invaild; create entry with new uuid
uuid = genuuid.createString()
name = "Pool-%s" % pool
try:
inst = XendCPUPool({'name_label': name}, uuid, False)
inst.update_XS(pool)
except PoolError, ex:
# log error and skip domain
log.error('cannot recreate pool %s; skipping (reason: %s)' \
% (name, ex))
else:
(name, descr) = xstransact.Read(path, 'name', 'description')
other_config = {}
for key in xstransact.List(path + 'other_config'):
other_config[key] = xstransact.Read(path +
'other_config/%s' %
key)
# check existance of pool instance
inst = XendAPIStore.get(uuid, cls.getClass())
if inst:
# update attributes of existing instance
inst.name_label = name
inst.name_description = descr
inst.other_config = other_config
else:
# recreate instance
try:
inst = XendCPUPool(
{
'name_label': name,
'name_description': descr,
'other_config': other_config,
'proposed_CPUs': pool_rec['cpulist'],
'ncpu': len(pool_rec['cpulist']),
}, uuid, False)
except PoolError, ex:
# log error and skip domain
log.error(
'cannot recreate pool %s; skipping (reason: %s)' \
% (name, ex))
def recreate_active_pools(cls):
""" Read active pool config from hypervisor and create pool instances.
- Query pool ids and assigned CPUs from hypervisor.
- Query additional information for any pool from xenstore.
If an entry for a pool id is missing in xenstore, it will be
recreated with a new uuid and generic name (this is an error case)
- Create an XendCPUPool instance for any pool id
Function have to be called after recreation of managed pools.
"""
log.debug('recreate_active_pools')
for pool_rec in xc.cpupool_getinfo():
pool = pool_rec['cpupool']
# read pool data from xenstore
path = XS_POOLROOT + "%s/" % pool
uuid = xstransact.Read(path, 'uuid')
if not uuid:
# xenstore entry missing / invaild; create entry with new uuid
uuid = genuuid.createString()
name = "Pool-%s" % pool
try:
inst = XendCPUPool( { 'name_label' : name }, uuid, False )
inst.update_XS(pool)
except PoolError, ex:
# log error and skip domain
log.error('cannot recreate pool %s; skipping (reason: %s)' \
% (name, ex))
else:
(name, descr) = xstransact.Read(path, 'name', 'description')
other_config = {}
for key in xstransact.List(path + 'other_config'):
other_config[key] = xstransact.Read(
path + 'other_config/%s' % key)
# check existance of pool instance
inst = XendAPIStore.get(uuid, cls.getClass())
if inst:
# update attributes of existing instance
inst.name_label = name
inst.name_description = descr
inst.other_config = other_config
else:
# recreate instance
try:
inst = XendCPUPool(
{ 'name_label' : name,
'name_description' : descr,
'other_config' : other_config,
'proposed_CPUs' : pool_rec['cpulist'],
'ncpu' : len(pool_rec['cpulist']),
},
uuid, False )
except PoolError, ex:
# log error and skip domain
log.error(
'cannot recreate pool %s; skipping (reason: %s)' \
% (name, ex))
def login_unconditionally(self, username):
"""Returns a session UUID if valid.
@rtype: string
@return: Session UUID
"""
new_session = uuid.createString()
self.sessions[new_session] = (username, time.time())
return new_session
def create(cls, record):
""" Create a new managed pool instance.
@param record: attributes of pool
@type record: dict
@return: uuid of created pool
@rtype: str
"""
new_uuid = genuuid.createString()
XendCPUPool(record, new_uuid)
XendNode.instance().save_cpu_pools()
return new_uuid
def create(cls, record):
""" Create a new managed pool instance.
@param record: attributes of pool
@type record: dict
@return: uuid of created pool
@rtype: str
"""
new_uuid = genuuid.createString()
XendCPUPool(record, new_uuid)
XendNode.instance().save_cpu_pools()
return new_uuid
def pool_create(cls, config):
try:
record = sxp2map(config)
if record.has_key('proposed_CPUs') and \
not isinstance(record['proposed_CPUs'], types.ListType):
record['proposed_CPUs'] = [record['proposed_CPUs']]
new_uuid = genuuid.createString()
pool = XendCPUPool(record, new_uuid, False)
pool.activate()
except XendAPIError, ex:
raise VmError(ex.get_api_error())
def pool_create(cls, config):
try:
record = sxp2map(config)
if record.has_key('proposed_CPUs') and \
not isinstance(record['proposed_CPUs'], types.ListType):
record['proposed_CPUs'] = [record['proposed_CPUs']]
new_uuid = genuuid.createString()
pool = XendCPUPool(record, new_uuid, False)
pool.activate()
except XendAPIError, ex:
raise VmError(ex.get_api_error())
def __acm_init(self):
act_pol_name = self.get_hv_loaded_policy_name()
initialize()
ref = uuid.createString()
try:
self.xsobjs[ref] = ACMPolicy(name=act_pol_name, ref=ref)
self.policies[ref] = (act_pol_name, xsconstants.ACM_POLICY_ID)
self.xsobjs[ref].validate_enforced_policy_hash()
except Exception, e:
log.error("Could not find XML representation of policy '%s': "
"%s" % (act_pol_name,e))
rc, errors, acmpol_def = ACMPolicy.force_default_policy(ref)
if rc == xsconstants.XSERR_SUCCESS:
self.xsobjs[ref] = acmpol_def
self.policies[ref] = (acmpol_def.get_name(),
xsconstants.ACM_POLICY_ID)
log.info("Switched to DEFAULT policy.")
def __acm_init(self):
act_pol_name = self.get_hv_loaded_policy_name()
initialize()
ref = uuid.createString()
try:
self.xsobjs[ref] = ACMPolicy(name=act_pol_name, ref=ref)
self.policies[ref] = (act_pol_name, xsconstants.ACM_POLICY_ID)
self.xsobjs[ref].validate_enforced_policy_hash()
except Exception, e:
log.error("Could not find XML representation of policy '%s': "
"%s" % (act_pol_name, e))
rc, errors, acmpol_def = ACMPolicy.force_default_policy(ref)
if rc == xsconstants.XSERR_SUCCESS:
self.xsobjs[ref] = acmpol_def
self.policies[ref] = (acmpol_def.get_name(),
xsconstants.ACM_POLICY_ID)
log.info("Switched to DEFAULT policy.")
def create_phy(self, name):
"""
Called when a new bridge is found on xend start
"""
# Create new uuids
uuid = genuuid.createString()
# Create instance
record = {
'name_label': name,
'name_description': '',
'other_config': {},
'default_gateway': '',
'default_netmask': '',
'managed': False,
}
network = XendNetwork(record, uuid)
return uuid
def create_phy(self, name):
"""
Called when a new bridge is found on xend start
"""
# Create new uuids
uuid = genuuid.createString()
# Create instance
record = {
'name_label': name,
'name_description': '',
'other_config': {},
'default_gateway': '',
'default_netmask': '',
'managed': False,
}
network = XendNetwork(record, uuid)
return uuid
def create(self, record):
"""
Called from API, to create a new network
"""
# Create new uuids
uuid = genuuid.createString()
# Create instance (do this first, to check record)
network = XendNetwork(record, uuid)
# Check network doesn't already exist
name_label = network.name_label
if bridge_exists(name_label):
del network
raise UniqueNameError(name_label, "network")
# Create the bridge
Brctl.bridge_create(network.name_label)
XendNode.instance().save_networks()
return uuid
def create(self, record):
"""
Called from API, to create a new network
"""
# Create new uuids
uuid = genuuid.createString()
# Create instance (do this first, to check record)
network = XendNetwork(record, uuid)
# Check network doesn't already exist
name_label = network.name_label
if bridge_exists(name_label):
del network
raise UniqueNameError(name_label, "network")
# Create the bridge
Brctl.bridge_create(network.name_label)
XendNode.instance().save_networks()
return uuid
def create(cls, record):
uuid = genuuid.createString()
pbd = XendPBD(record, uuid)
return uuid
def __add_acmpolicy_to_system(self, xmltext, flags, overwrite):
errors = ""
if security.on() != xsconstants.XS_POLICY_ACM:
raise SecurityError(-xsconstants.XSERR_POLICY_TYPE_UNSUPPORTED)
loadedpol = self.get_loaded_policy()
if loadedpol:
# This is meant as an update to a currently loaded policy
if flags & xsconstants.XS_INST_LOAD == 0:
raise SecurityError(-xsconstants.XSERR_POLICY_LOADED)
# Remember old flags, so they can be restored if update fails
old_flags = self.get_policy_flags(loadedpol)
# Remove policy from bootloader in case of new name of policy
self.rm_bootpolicy()
rc, errors = loadedpol.update(xmltext)
if rc == 0:
irc = self.activate_xspolicy(loadedpol, flags)
# policy is loaded; if setting the boot flag fails it's ok.
else:
old_flags = old_flags & xsconstants.XS_INST_BOOT
log.info("OLD FLAGS TO RESTORE: %s" % str(old_flags))
if old_flags != 0:
self.activate_xspolicy(loadedpol, xsconstants.XS_INST_BOOT)
return (loadedpol, rc, errors)
try:
dom = minidom.parseString(xmltext.encode("utf-8"))
except:
raise SecurityError(-xsconstants.XSERR_BAD_XML)
ref = uuid.createString()
acmpol = ACMPolicy(dom=dom, ref=ref)
#First some basic tests that do not modify anything:
if flags & xsconstants.XS_INST_BOOT and not overwrite:
filename = acmpol.get_filename(".bin","",dotted=True)
if bootloader.get_default_policy != None and \
not bootloader.loads_default_policy(filename):
raise SecurityError(-xsconstants.XSERR_BOOTPOLICY_INSTALLED)
if not overwrite and len(self.policies) >= self.maxpolicies:
raise SecurityError(-xsconstants.XSERR_BOOTPOLICY_INSTALLED)
if overwrite:
#This should only give one key since only one policy is
#allowed.
keys = self.policies.keys()
for k in keys:
self.rm_bootpolicy()
rc = self.rm_policy_from_system(k, force=overwrite)
if rc != xsconstants.XSERR_SUCCESS:
raise SecurityError(rc)
rc = acmpol.compile()
if rc != 0:
raise SecurityError(rc)
if flags & xsconstants.XS_INST_LOAD:
rc = acmpol.loadintohv()
if rc != 0:
raise SecurityError(rc)
if flags & xsconstants.XS_INST_BOOT:
rc = self.make_boot_policy(acmpol)
if rc != 0:
# If it cannot be installed due to unsupported
# bootloader, let it be ok.
pass
if dom:
new_entry = { ref : tuple([acmpol.get_name(),
xsconstants.ACM_POLICY_ID]) }
self.policies.update(new_entry)
self.xsobjs[ref] = acmpol
return (acmpol, xsconstants.XSERR_SUCCESS, errors)
def pci_convert_sxp_to_dict(dev_sxp):
"""Convert pci device sxp to dict
@param dev_sxp: device configuration
@type dev_sxp: SXP object (parsed config)
@return: dev_config
@rtype: dictionary
"""
# Parsing the device SXP's. In most cases, the SXP looks
# like this:
#
# [device, [vif, [mac, xx:xx:xx:xx:xx:xx], [ip 1.3.4.5]]]
#
# However, for PCI devices it looks like this:
#
# [device, [pci, [dev, [domain, 0], [bus, 0], [slot, 1], [func, 2]]]
#
# It seems the reasoning for this difference is because
# pciif.py needs all the PCI device configurations at
# the same time when creating the devices.
#
# To further complicate matters, Xen 2.0 configuration format
# uses the following for pci device configuration:
#
# [device, [pci, [domain, 0], [bus, 0], [dev, 1], [func, 2]]]
# For PCI device hotplug support, the SXP of PCI devices is
# extendend like this:
#
# [device, [pci, [dev, [domain, 0], [bus, 0], [slot, 1], [func, 2],
# [vdevfn, 0]],
# [state, 'Initialising']]]
#
# 'vdevfn' shows the virtual hotplug slot number which the PCI device
# is inserted in. This is only effective for HVM domains.
#
# state 'Initialising' indicates that the device is being attached,
# while state 'Closing' indicates that the device is being detached.
#
# The Dict looks like this:
#
# { devs: [{domain: 0, bus: 0, slot: 1, func: 2, vdevfn: 0}],
# states: ['Initialising'] }
dev_config = {}
pci_devs = []
for pci_dev in sxp.children(dev_sxp, 'dev'):
pci_dev_info = dict(pci_dev[1:])
if 'opts' in pci_dev_info:
pci_dev_info['opts'] = pci_opts_list_from_sxp(pci_dev)
# If necessary, initialize uuid, key, and vdevfn for each pci device
if not pci_dev_info.has_key('uuid'):
pci_dev_info['uuid'] = uuid.createString()
if not pci_dev_info.has_key('key'):
pci_dev_info['key'] = "%02x:%02x.%x" % \
(int(pci_dev_info['bus'], 16),
int(pci_dev_info['slot'], 16),
int(pci_dev_info['func'], 16))
if not pci_dev_info.has_key('vdevfn'):
pci_dev_info['vdevfn'] = "0x%02x" % AUTO_PHP_SLOT
pci_devs.append(pci_dev_info)
dev_config['devs'] = pci_devs
pci_states = []
for pci_state in sxp.children(dev_sxp, 'state'):
try:
pci_states.append(pci_state[1])
except IndexError:
raise XendError("Error reading state while parsing pci sxp")
dev_config['states'] = pci_states
return dev_config
def __add_acmpolicy_to_system(self, xmltext, flags, overwrite):
errors = ""
if security.on() != xsconstants.XS_POLICY_ACM:
raise SecurityError(-xsconstants.XSERR_POLICY_TYPE_UNSUPPORTED)
loadedpol = self.get_loaded_policy()
if loadedpol:
# This is meant as an update to a currently loaded policy
if flags & xsconstants.XS_INST_LOAD == 0:
raise SecurityError(-xsconstants.XSERR_POLICY_LOADED)
# Remember old flags, so they can be restored if update fails
old_flags = self.get_policy_flags(loadedpol)
# Remove policy from bootloader in case of new name of policy
self.rm_bootpolicy()
rc, errors = loadedpol.update(xmltext)
if rc == 0:
irc = self.activate_xspolicy(loadedpol, flags)
# policy is loaded; if setting the boot flag fails it's ok.
else:
old_flags = old_flags & xsconstants.XS_INST_BOOT
log.info("OLD FLAGS TO RESTORE: %s" % str(old_flags))
if old_flags != 0:
self.activate_xspolicy(loadedpol, xsconstants.XS_INST_BOOT)
return (loadedpol, rc, errors)
try:
dom = minidom.parseString(xmltext.encode("utf-8"))
except:
raise SecurityError(-xsconstants.XSERR_BAD_XML)
ref = uuid.createString()
acmpol = ACMPolicy(dom=dom, ref=ref)
#First some basic tests that do not modify anything:
if flags & xsconstants.XS_INST_BOOT and not overwrite:
filename = acmpol.get_filename(".bin", "", dotted=True)
if bootloader.get_default_policy != None and \
not bootloader.loads_default_policy(filename):
raise SecurityError(-xsconstants.XSERR_BOOTPOLICY_INSTALLED)
if not overwrite and len(self.policies) >= self.maxpolicies:
raise SecurityError(-xsconstants.XSERR_BOOTPOLICY_INSTALLED)
if overwrite:
#This should only give one key since only one policy is
#allowed.
keys = self.policies.keys()
for k in keys:
self.rm_bootpolicy()
rc = self.rm_policy_from_system(k, force=overwrite)
if rc != xsconstants.XSERR_SUCCESS:
raise SecurityError(rc)
rc = acmpol.compile()
if rc != 0:
raise SecurityError(rc)
if flags & xsconstants.XS_INST_LOAD:
rc = acmpol.loadintohv()
if rc != 0:
raise SecurityError(rc)
if flags & xsconstants.XS_INST_BOOT:
rc = self.make_boot_policy(acmpol)
if rc != 0:
# If it cannot be installed due to unsupported
# bootloader, let it be ok.
pass
if dom:
new_entry = {
ref: tuple([acmpol.get_name(), xsconstants.ACM_POLICY_ID])
}
self.policies.update(new_entry)
self.xsobjs[ref] = acmpol
return (acmpol, xsconstants.XSERR_SUCCESS, errors)
def pci_convert_sxp_to_dict(dev_sxp):
"""Convert pci device sxp to dict
@param dev_sxp: device configuration
@type dev_sxp: SXP object (parsed config)
@return: dev_config
@rtype: dictionary
"""
# Parsing the device SXP's. In most cases, the SXP looks
# like this:
#
# [device, [vif, [mac, xx:xx:xx:xx:xx:xx], [ip 1.3.4.5]]]
#
# However, for PCI devices it looks like this:
#
# [device, [pci, [dev, [domain, 0], [bus, 0], [slot, 1], [func, 2]]]
#
# It seems the reasoning for this difference is because
# pciif.py needs all the PCI device configurations at
# the same time when creating the devices.
#
# To further complicate matters, Xen 2.0 configuration format
# uses the following for pci device configuration:
#
# [device, [pci, [domain, 0], [bus, 0], [dev, 1], [func, 2]]]
# For PCI device hotplug support, the SXP of PCI devices is
# extendend like this:
#
# [device, [pci, [dev, [domain, 0], [bus, 0], [slot, 1], [func, 2],
# [vdevfn, 0]],
# [state, 'Initialising']]]
#
# 'vdevfn' shows the virtual hotplug slot number which the PCI device
# is inserted in. This is only effective for HVM domains.
#
# state 'Initialising' indicates that the device is being attached,
# while state 'Closing' indicates that the device is being detached.
#
# The Dict looks like this:
#
# { devs: [{domain: 0, bus: 0, slot: 1, func: 2, vdevfn: 0}],
# states: ['Initialising'] }
dev_config = {}
pci_devs = []
for pci_dev in sxp.children(dev_sxp, 'dev'):
pci_dev_info = dict(pci_dev[1:])
if 'opts' in pci_dev_info:
pci_dev_info['opts'] = pci_opts_list_from_sxp(pci_dev)
# append uuid to each pci device that does't already have one.
if not pci_dev_info.has_key('uuid'):
dpci_uuid = pci_dev_info.get('uuid', uuid.createString())
pci_dev_info['uuid'] = dpci_uuid
pci_devs.append(pci_dev_info)
dev_config['devs'] = pci_devs
pci_states = []
for pci_state in sxp.children(dev_sxp, 'state'):
try:
pci_states.append(pci_state[1])
except IndexError:
raise XendError("Error reading state while parsing pci sxp")
dev_config['states'] = pci_states
return dev_config
def create(cls, record):
uuid = genuuid.createString()
pbd = XendPBD(record, uuid)
return uuid