本文整理汇总了Python中lock.Lock.cleanup方法的典型用法代码示例。如果您正苦于以下问题：Python Lock.cleanup方法的具体用法？Python Lock.cleanup怎么用？Python Lock.cleanup使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类lock.Lock的用法示例。
在下文中一共展示了Lock.cleanup方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: configure_blocktracking
# 需要导入模块: from lock import Lock [as 别名]
# 或者: from lock.Lock import cleanup [as 别名]
def configure_blocktracking(self, sr_uuid, vdi_uuid, enable):
"""Function for configuring blocktracking"""
import blktap2
vdi_ref = self.sr.srcmd.params['vdi_ref']
# Check if raw VDI or snapshot
if self.vdi_type == vhdutil.VDI_TYPE_RAW or \
self.session.xenapi.VDI.get_is_a_snapshot(vdi_ref):
raise xs_errors.XenError('VDIType',
opterr='Raw VDI or snapshot not permitted')
# Check if already enabled
if self._get_blocktracking_status() == enable:
return
# Save disk state before pause
disk_state = blktap2.VDI.tap_status(self.session, vdi_uuid)
if not blktap2.VDI.tap_pause(self.session, sr_uuid, vdi_uuid):
error = "Failed to pause VDI %s" % vdi_uuid
raise xs_errors.XenError('CBTActivateFailed', opterr=error)
logfile = None
try:
if enable:
try:
# Check available space
self._ensure_cbt_space()
logfile = self._create_cbt_log()
# Set consistency
if disk_state:
util.SMlog("Setting consistency of cbtlog file to False for VDI: %s"
% self.uuid)
logpath = self._get_cbt_logpath(self.uuid)
self._cbt_op(self.uuid, cbtutil.set_cbt_consistency,
logpath, False)
except Exception as error:
self._delete_cbt_log()
raise xs_errors.XenError('CBTActivateFailed',
opterr=str(error))
else:
from lock import Lock
lock = Lock("cbtlog", str(vdi_uuid))
lock.acquire()
try:
# Find parent of leaf metadata file, if any,
# and nullify its successor
logpath = self._get_cbt_logpath(self.uuid)
parent = self._cbt_op(self.uuid,
cbtutil.get_cbt_parent, logpath)
self._delete_cbt_log()
parent_path = self._get_cbt_logpath(parent)
if self._cbt_log_exists(parent_path):
self._cbt_op(parent, cbtutil.set_cbt_child,
parent_path, uuid.UUID(int=0))
except Exception as error:
raise xs_errors.XenError('CBTDeactivateFailed', str(error))
finally:
lock.release()
lock.cleanup("cbtlog", str(vdi_uuid))
finally:
blktap2.VDI.tap_unpause(self.session, sr_uuid, vdi_uuid)示例2: delete
# 需要导入模块: from lock import Lock [as 别名]
# 或者: from lock.Lock import cleanup [as 别名]
def delete(self, sr_uuid, vdi_uuid, data_only=False):
"""Delete this VDI.
This operation IS idempotent and should succeed if the VDI
exists and can be deleted or if the VDI does not exist. It is
the responsibility of the higher-level management tool to
ensure that the detach() operation has been explicitly called
prior to deletion, otherwise the delete() will fail if the
disk is still attached.
"""
import blktap2
from lock import Lock
if data_only == False and self._get_blocktracking_status():
logpath = self._get_cbt_logpath(vdi_uuid)
parent_uuid = self._cbt_op(vdi_uuid, cbtutil.get_cbt_parent,
logpath)
parent_path = self._get_cbt_logpath(parent_uuid)
child_uuid = self._cbt_op(vdi_uuid, cbtutil.get_cbt_child, logpath)
child_path = self._get_cbt_logpath(child_uuid)
lock = Lock("cbtlog", str(vdi_uuid))
if self._cbt_log_exists(parent_path):
self._cbt_op(parent_uuid, cbtutil.set_cbt_child,
parent_path, child_uuid)
if self._cbt_log_exists(child_path):
self._cbt_op(child_uuid, cbtutil.set_cbt_parent,
child_path, parent_uuid)
lock.acquire()
try:
# Coalesce contents of bitmap with child's bitmap
# Check if child bitmap is currently attached
paused_for_coalesce = False
consistent = self._cbt_op(child_uuid,
cbtutil.get_cbt_consistency,
child_path)
if not consistent:
if not blktap2.VDI.tap_pause(self.session,
sr_uuid, child_uuid):
raise util.SMException("failed to pause VDI %s")
paused_for_coalesce = True
self._activate_cbt_log(self._get_cbt_logname(vdi_uuid))
self._cbt_op(child_uuid, cbtutil.coalesce_bitmap,
logpath, child_path)
lock.release()
except util.CommandException:
# If there is an exception in coalescing,
# CBT log file is not deleted and pointers are reset
# to what they were
util.SMlog("Exception in coalescing bitmaps on VDI delete,"
" restoring to previous state")
try:
if self._cbt_log_exists(parent_path):
self._cbt_op(parent_uuid, cbtutil.set_cbt_child,
parent_path, vdi_uuid)
if self._cbt_log_exists(child_path):
self._cbt_op(child_uuid, cbtutil.set_cbt_parent,
child_path, vdi_uuid)
finally:
lock.release()
lock.cleanup("cbtlog", str(vdi_uuid))
return
finally:
# Unpause tapdisk if it wasn't originally paused
if paused_for_coalesce:
blktap2.VDI.tap_unpause(self.session, sr_uuid,
child_uuid)
lock.acquire()
try:
self._delete_cbt_log()
finally:
lock.release()
lock.cleanup("cbtlog", str(vdi_uuid))