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Provide generic API for OVS register match/set value
1. Use RegMark/RegField in OpenFlow Match or Load actions instead of passing the register ID and range. 2. The usage for OVS registers(including xxreg) should be predefined in regmarks.go. 3. Use reg0[0..3] to indicate the source of packet, and release reg0[4..15] for other usages. Signed-off-by: wenyingd <wenyingd@vmware.com>
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| Original file line number | Diff line number | Diff line change |
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| // Copyright 2019 Antrea Authors | ||
| // | ||
| // 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. | ||
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| package openflow | ||
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| import binding "antrea.io/antrea/pkg/ovs/openflow" | ||
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| // Fields using reg. | ||
| var ( | ||
| // reg0 (NXM_NX_REG0) | ||
| // reg0[0..3]: Field to mark the packet source. Marks in this field include, | ||
| // - 0: from the tunnel port | ||
| // - 1: from antrea-gw0 | ||
| // - 2: from the local Pods | ||
| // - 4: from the Bridge interface | ||
| // - 5: from the uplink interface | ||
| PktSourceField = binding.NewRegField(0, 0, 3, "PacketSource") | ||
| FromTunnelRegMark = binding.NewRegMark(PktSourceField, 0) | ||
| FromGatewayRegMark = binding.NewRegMark(PktSourceField, 1) | ||
| FromLocalRegMark = binding.NewRegMark(PktSourceField, 2) | ||
| FromUplinkRegMark = binding.NewRegMark(PktSourceField, 4) | ||
| FromBridgeRegMark = binding.NewRegMark(PktSourceField, 5) | ||
| // reg0[16]: Mark to indicate the ofPort number of an interface is found. | ||
| OFPortFoundRegMark = binding.NewOneBitRegMark(0, 16, "OFPortFound") | ||
| // reg0[17]: Mark to indicate the packet needs to be SNATed with Node's IP. | ||
| SNATNodeIPRegMark = binding.NewOneBitRegMark(0, 17, "SNATWithNodeIP") | ||
| // reg0[18]: Mark to indicate the packet needs DNAT to virtual IP. | ||
| // If a packet uses HairpinRegMark, it will be output to the port where it enters OVS pipeline in L2ForwardingOutTable. | ||
| HairpinRegMark = binding.NewOneBitRegMark(0, 18, "Hairpin") | ||
| // reg0[19]: Mark to indicate the packet's MAC address needs to be rewritten. | ||
| RewriteMACRegMark = binding.NewOneBitRegMark(0, 19, "RewriteMAC") | ||
| // reg0[20]: Mark to indicate the packet is denied(Drop/Reject). | ||
| CnpDenyRegMark = binding.NewOneBitRegMark(0, 20, "CNPDeny") | ||
| // reg0[21..22]: Field to indicate disposition of Antrea Policy. It could have more bits to support more disposition | ||
| // that Antrea policy support in the future. | ||
| // Marks in this field include, | ||
| // - 0b00: allow | ||
| // - 0b01: drop | ||
| // - 0b10: reject | ||
| APDispositionField = binding.NewRegField(0, 21, 22, "APDisposition") | ||
| DispositionAllowRegMark = binding.NewRegMark(APDispositionField, DispositionAllow) | ||
| DispositionDropRegMark = binding.NewRegMark(APDispositionField, DispositionDrop) | ||
| DispositionRejRegMark = binding.NewRegMark(APDispositionField, DispositionRej) | ||
| // reg0[24..26]: Field to indicate the reasons of sending packet to the controller. | ||
| // Marks in this field include, | ||
| // - 0b001: logging | ||
| // - 0b010: reject | ||
| // - 0b100: deny (used by Flow Exporter) | ||
| CustomReasonField = binding.NewRegField(0, 24, 26, "PacketInReason") | ||
| CustomReasonLoggingRegMark = binding.NewRegMark(CustomReasonField, CustomReasonLogging) | ||
| CustomReasonRejectRegMark = binding.NewRegMark(CustomReasonField, CustomReasonReject) | ||
| CustomReasonDenyRegMark = binding.NewRegMark(CustomReasonField, CustomReasonDeny) | ||
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| // reg1(NXM_NX_REG1) | ||
| // Field to cache the ofPort of the OVS interface where to output packet. | ||
| TargetOFPortField = binding.NewRegField(1, 0, 31, "TargetOFPort") | ||
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| // reg2(NXM_NX_REG2) | ||
| // Field to help swap values in two different flow fields in the OpenFlow actions. This field is only used in func | ||
| // `arpResponderStaticFlow`. | ||
| SwapField = binding.NewRegField(2, 0, 31, "SwapValue") | ||
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| // reg3(NXM_NX_REG3) | ||
| // Field to store the selected Service Endpoint IP | ||
| EndpointIPField = binding.NewRegField(3, 0, 31, "EndpointIP") | ||
| // Field to store the conjunction ID which is for "deny" rule in CNP. It shares the same register with EndpointIPField, | ||
| // since the service selection will finish when a packet hitting NetworkPolicy related rules. | ||
| CNPDenyConjIDField = binding.NewRegField(3, 0, 31, "CNPDenyConjunctionID") | ||
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| // reg4(NXM_NX_REG4) | ||
| // reg4[0..15]: Field to store the selected Service Endpoint port. | ||
| EndpointPortField = binding.NewRegField(4, 0, 15, "EndpointPort") | ||
| // reg4[16..18]: Field to store the state of a packet accessing a Service. Marks in this field include, | ||
| // - 0b001: packet need to do service selection. | ||
| // - 0b010: packet has done service selection. | ||
| // - 0b011: packet has done service selection and the selection result needs to be cached. | ||
| ServiceEPStateField = binding.NewRegField(4, 16, 18, "EndpointState") | ||
| EpToSelectRegMark = binding.NewRegMark(ServiceEPStateField, 0b001) | ||
| EpSelectedRegMark = binding.NewRegMark(ServiceEPStateField, 0b010) | ||
| EpToLearnRegMark = binding.NewRegMark(ServiceEPStateField, 0b011) | ||
| // reg4[0..18]: Field to store the union value of Endpoint port and Endpoint status. It is used as a single match | ||
| // when needed. | ||
| EpUnionField = binding.NewRegField(4, 0, 18, "EndpointUnion") | ||
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| // reg5(NXM_NX_REG5) | ||
| // Field to cache the Egress conjunction ID hit by TraceFlow packet. | ||
| TFEgressConjIDField = binding.NewRegField(5, 0, 31, "TFEgressConjunctionID") | ||
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| // reg(N6XM_NX_REG6) | ||
| // Field to store the Ingress conjunction ID hit by TraceFlow packet. | ||
| TFIngressConjIDField = binding.NewRegField(6, 0, 31, "TFIngressConjunctionID") | ||
| ) | ||
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| // Fields using xxreg. | ||
| var ( | ||
| // xxreg3(NXM_NX_XXREG3) | ||
| // xxreg3: Field to cache Endpoint IPv6 address. It occupies reg12-reg15 in the meanwhile. | ||
| EndpointIP6Field = binding.NewXXRegField(3, 0, 127) | ||
| ) | ||
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| // Marks using CT. | ||
| var ( | ||
| // Mark to indicate the connection is initiated through the host gateway interface | ||
| // (i.e. for which the first packet of the connection was received through the gateway). | ||
| FromGatewayCTMark = binding.NewCtMark(0x20, 0, 31) | ||
| // Mark to indicate DNAT is performed on the connection for Service. | ||
| ServiceCTMark = binding.NewCtMark(0x21, 0, 31) | ||
| ) | ||
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| // Fields using CT label. | ||
| var ( | ||
| // Field to store the ingress rule ID. | ||
| IngressRuleCTLabelField = binding.NewCtLabelField(0, 31, "ingressRuleCtLabel") | ||
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| // Field to store the egress rule ID. | ||
| EgressRuleCTLabelField = binding.NewCtLabelField(32, 63, "egressRuleCtLabel") | ||
| ) |
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