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OpenStack Study: pci_passthrough_filter.py**** CubicPower OpenStack Study ****
# All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. from nova.scheduler import filters
**** CubicPower OpenStack Study **** class PciPassthroughFilter(filters.BaseHostFilter): """Pci Passthrough Filter based on PCI request Filter that schedules instances on a host if the host has devices to meet the device requests in the 'extra_specs' for the flavor. PCI resource tracker provides updated summary information about the PCI devices for each host, like: [{"count": 5, "vendor_id": "8086", "product_id": "1520", "extra_info":'{}'}], and VM requests PCI devices via PCI requests, like: [{"count": 1, "vendor_id": "8086", "product_id": "1520",}]. The filter checks if the host passes or not based on this information. """
**** CubicPower OpenStack Study **** def host_passes(self, host_state, filter_properties): """Return true if the host has the required PCI devices.""" if not filter_properties.get('pci_requests'): return True return host_state.pci_stats.support_requests( filter_properties.get('pci_requests'))
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