def probe(self):
if self.mpath == "true" and self.dconf.has_key('SCSIid'):
# When multipathing is enabled, since we don't refcount the multipath maps,
# we should not attempt to do the iscsi.attach/detach when the map is already present,
# as this will remove it (which may well be in use).
maps = []
try:
maps = mpath_cli.list_maps()
except:
pass
if self.dconf['SCSIid'] in maps:
if (mpp_luncheck.is_RdacLun(self.dconf['SCSIid'])):
mpath_cli.remove_map(self.dconf['SCSIid'])
else:
raise xs_errors.XenError('SRInUse')
else:
if (mpp_luncheck.is_RdacLun(self.dconf['SCSIid'])):
link=glob.glob('/dev/disk/mpInuse/%s-*' % self.dconf['SCSIid'])
if (len(link)):
raise xs_errors.XenError('SRInUse')
self.mpathmodule.refresh(self.SCSIid,0)
try:
self._pathrefresh(LVHDoHBASR)
result = LVHDSR.LVHDSR.probe(self)
if self.mpath == "true":
self.mpathmodule.reset(self.SCSIid,True)
return result
except:
if self.mpath == "true":
self.mpathmodule.reset(self.SCSIid,True)
raise
def _resetDMP(sid,explicit_unmap=False):
# If mpath has been turned on since the sr/vdi was attached, we
# might be trying to unmap it before the daemon has been started
# This is unnecessary (and will fail) so just return.
deactivate_MPdev(sid)
if not _is_mpath_daemon_running():
util.SMlog("Warning: Trying to unmap mpath device when multipathd not running")
return
# If the multipath daemon is running, but we were initially plugged
# with multipathing set to no, there may be no map for us in the multipath
# tables. In that case, list_paths will return [], but remove_map might
# throw an exception. Catch it and ignore it.
if explicit_unmap:
util.SMlog("Explicit unmap")
devices = mpath_cli.list_paths(sid)
try:
mpath_cli.remove_map(sid)
except:
util.SMlog("Warning: Removing the path failed")
pass
for device in devices:
mpath_cli.remove_path(device)
else:
mpath_cli.ensure_map_gone(sid)
path = "/dev/mapper/%s" % sid
if not util.wait_for_nopath(path, 10):
util.SMlog("MPATH: WARNING - path did not disappear [%s]" % path)
else:
util.SMlog("MPATH: path disappeared [%s]" % path)
def probe(self):
if self.mpath == "true" and self.dconf.has_key('SCSIid'):
# When multipathing is enabled, since we don't refcount the multipath maps,
# we should not attempt to do the iscsi.attach/detach when the map is already present,
# as this will remove it (which may well be in use).
maps = []
try:
maps = mpath_cli.list_maps()
except:
pass
if self.dconf['SCSIid'] in maps:
if (mpp_luncheck.is_RdacLun(self.dconf['SCSIid'])):
mpath_cli.remove_map(self.dconf['SCSIid'])
else:
raise xs_errors.XenError('SRInUse')
else:
if (mpp_luncheck.is_RdacLun(self.dconf['SCSIid'])):
link = glob.glob('/dev/disk/mpInuse/%s-*' %
self.dconf['SCSIid'])
if (len(link)):
raise xs_errors.XenError('SRInUse')
self.mpathmodule.refresh(self.SCSIid, 0)
try:
self._pathrefresh(LVHDoHBASR)
result = LVHDSR.LVHDSR.probe(self)
if self.mpath == "true":
self.mpathmodule.reset(self.SCSIid, True)
return result
except:
if self.mpath == "true":
self.mpathmodule.reset(self.SCSIid, True)
raise
def _resetDMP(sid, explicit_unmap=False, delete_nodes=False):
# If mpath has been turned on since the sr/vdi was attached, we
# might be trying to unmap it before the daemon has been started
# This is unnecessary (and will fail) so just return.
deactivate_MPdev(sid)
if not _is_mpath_daemon_running():
util.SMlog(
"Warning: Trying to unmap mpath device when multipathd not running"
)
return
# If the multipath daemon is running, but we were initially plugged
# with multipathing set to no, there may be no map for us in the multipath
# tables. In that case, list_paths will return [], but remove_map might
# throw an exception. Catch it and ignore it.
if explicit_unmap:
util.SMlog("Explicit unmap")
# Remove map from conf file, if any
try:
wwid_conf.edit_wwid(sid, True)
except:
util.SMlog("WARNING: exception raised while attempting to"
" modify multipath.conf")
try:
mpath_cli.reconfigure()
except:
util.SMlog("WARNING: exception raised while attempting to"
" reconfigure")
time.sleep(5)
devices = mpath_cli.list_paths(sid)
try:
mpath_cli.remove_map(sid)
except:
util.SMlog("Warning: Removing the path failed")
pass
for device in devices:
mpath_cli.remove_path(device)
if delete_nodes:
_delete_node(device)
else:
mpath_cli.ensure_map_gone(sid)
path = "/dev/mapper/%s" % sid
if not util.wait_for_nopath(path, 10):
util.SMlog("MPATH: WARNING - path did not disappear [%s]" % path)
else:
util.SMlog("MPATH: path disappeared [%s]" % path)
def remove(scsi_id):
paths=mpath_cli.list_paths(scsi_id)
mpath_cli.remove_map(scsi_id)
for path in paths:
mpath_cli.remove_path(path)
def remove(scsi_id):
paths=mpath_cli.list_paths(scsi_id)
mpath_cli.remove_map(scsi_id)
for path in paths:
mpath_cli.remove_path(path)
