Set DSCP for host endpoints

[mazdakn]

Description

Setting DSCP for host endpoint. This is a follow up for the first PR: #10718

Related issues/PRs

Todos

• Tests
• Documentation
• Release note

Release Note

TBD

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[Copilot]

Pull Request Overview

This PR implements DSCP (Differentiated Services Code Point) support for host endpoints, building upon the previous work for workload endpoints. It adds the ability to set DSCP values on traffic from host endpoints for quality of service (QoS) marking.

Key changes:

• Add DSCP field to QoSControls model structures and protobuf definitions
• Implement QoS policy chain rendering and management for iptables/nftables
• Add support for DSCP annotations in Kubernetes backend conversion
• Create comprehensive tests for QoS policy functionality

Reviewed Changes

Copilot reviewed 30 out of 30 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
libcalico-go/lib/backend/model/hostendpoint.go	Adds QoSControls pointer field to HostEndpoint struct
libcalico-go/lib/backend/k8s/conversion/workload_endpoint_default.go	Updates copyright and adds DSCP annotation handling logic
libcalico-go/lib/backend/k8s/conversion/constants.go	Updates copyright and adds AnnotationQoSEgressDSCP constant
libcalico-go/lib/apis/v3/zz_generated.deepcopy.go	Updates generated deepcopy methods for DSCP field
libcalico-go/lib/apis/v3/workloadendpoint.go	Updates copyright and adds DSCP field to QoSControls struct
libcalico-go/lib/apis/v3/generated.openapi.go	Adds DSCP field to OpenAPI schema
felix/rules/static_test.go	Adds test expectations for QoS policy chain jump rules
felix/rules/static.go	Implements QoS policy chain jump logic in mangle table
felix/rules/rule_defs.go	Adds QoS policy chain constant and interface method
felix/rules/qos_test.go	New comprehensive test file for QoS policy chain rendering
felix/rules/qos.go	New implementation file for QoS policy chain rendering
felix/rules/nat.go	Updates copyright and renames IPSet constant for consistency
felix/proto/felixbackend.proto	Adds QoSPolicy message and fields to endpoint messages
felix/proto/felixbackend.pb.go	Generated protobuf code with QoSPolicy support
felix/nftables/actions_test.go	Adds test cases for DSCPAction in nftables
felix/nftables/actions.go	Implements DSCPAction for nftables dataplane
felix/iptables/actions_test.go	Adds test cases for DSCPAction in iptables
felix/iptables/actions.go	Implements DSCPAction for iptables dataplane
felix/generictables/actions.go	Adds DSCP method to ActionFactory interface
felix/fv/qos_policy_test.go	New comprehensive functional test for QoS policies
felix/fv/infrastructure/infra_k8s.go	Updates pod annotations for DSCP QoS controls
felix/dataplane/linux/qos_policy_mgr_test.go	New unit tests for QoS policy manager
felix/dataplane/linux/qos_policy_mgr.go	New QoS policy manager implementation
felix/dataplane/linux/masq_mgr.go	Updates IPSet ID constant for consistency
felix/dataplane/linux/int_dataplane.go	Registers QoS policy managers for IPv4/IPv6
felix/calc/event_sequencer_test.go	Adds DSCP test data and copyright update
felix/calc/event_sequencer.go	Converts DSCP from model to protobuf format
api/pkg/openapi/generated.openapi.go	Adds DSCP type to OpenAPI definitions
api/pkg/lib/numorstring/numorstring_test.go	Adds comprehensive DSCP validation tests
api/pkg/lib/numorstring/dscp.go	New DSCP type implementation with validation

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