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 _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 refresh_devices_if_needed(primarydevice, SCSIid, currentcapacity): devices = get_devices_by_SCSIid(SCSIid) if "/dev/mapper/" in primarydevice: devices = set(devices + mpath_cli.list_paths(SCSIid)) devicesthatneedrefresh = get_outdated_size_devices( currentcapacity, devices) if devicesthatneedrefresh: # timing out avoids waiting for min(dev_loss_tmo, fast_io_fail_tmo) # if one or multiple devices don't answer util.timeout_call(10, refreshdev, devicesthatneedrefresh) if get_outdated_size_devices(currentcapacity, devicesthatneedrefresh): # in this state we shouldn't force resizing the mapper dev raise util.SMException("Failed to get %s to agree on the " "current capacity." % devicesthatneedrefresh)
def refresh_devices_if_needed(primarydevice, SCSIid, currentcapacity): devices = get_devices_by_SCSIid(SCSIid) if "/dev/mapper/" in primarydevice: devices = set(devices + mpath_cli.list_paths(SCSIid)) devicesthatneedrefresh = get_outdated_size_devices(currentcapacity, devices) if devicesthatneedrefresh: # timing out avoids waiting for min(dev_loss_tmo, fast_io_fail_tmo) # if one or multiple devices don't answer util.timeout_call(10, refreshdev, devicesthatneedrefresh) if get_outdated_size_devices(currentcapacity, devicesthatneedrefresh): # in this state we shouldn't force resizing the mapper dev raise util.SMException("Failed to get %s to agree on the " "current capacity." % devicesthatneedrefresh)
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)