forked from cilium/cilium
/
regenerationcontext.go
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/
regenerationcontext.go
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// Copyright 2016-2019 Authors of Cilium
//
// 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.
package endpoint
import (
"context"
"github.com/cilium/cilium/pkg/completion"
"github.com/cilium/cilium/pkg/endpoint/regeneration"
"github.com/cilium/cilium/pkg/revert"
)
// RegenerationContext provides context to regenerate() calls to determine
// the caller, and which specific aspects to regeneration are necessary to
// update the datapath to implement the new behavior.
type regenerationContext struct {
// Reason provides context to source for the regeneration, which is
// used to generate useful log messages.
Reason string
// Stats are collected during the endpoint regeneration and provided
// back to the caller
Stats regenerationStatistics
// DoneFunc must be called when the most resource intensive portion of
// the regeneration is done
DoneFunc func()
datapathRegenerationContext *datapathRegenerationContext
parentContext context.Context
cancelFunc context.CancelFunc
}
func ParseExternalRegenerationMetadata(ctx context.Context, c context.CancelFunc, e *regeneration.ExternalRegenerationMetadata) *regenerationContext {
return ®enerationContext{
Reason: e.Reason,
datapathRegenerationContext: &datapathRegenerationContext{
regenerationLevel: e.RegenerationLevel,
ctCleaned: make(chan struct{}),
},
parentContext: ctx,
cancelFunc: c,
}
}
// datapathRegenerationContext contains information related to regenerating the
// datapath (BPF, proxy, etc.).
type datapathRegenerationContext struct {
bpfHeaderfilesHash string
epInfoCache *epInfoCache
proxyWaitGroup *completion.WaitGroup
ctCleaned chan struct{}
completionCtx context.Context
completionCancel context.CancelFunc
currentDir string
nextDir string
regenerationLevel regeneration.DatapathRegenerationLevel
finalizeList revert.FinalizeList
revertStack revert.RevertStack
}
func (ctx *datapathRegenerationContext) prepareForProxyUpdates(parentCtx context.Context) {
completionCtx, completionCancel := context.WithTimeout(parentCtx, EndpointGenerationTimeout)
ctx.proxyWaitGroup = completion.NewWaitGroup(completionCtx)
ctx.completionCtx = completionCtx
ctx.completionCancel = completionCancel
}