Upgrade k8s package verison (#5358)

* upgrade k8s package version

Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io>

* Script upgrade and code formatting.

Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io>

Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io>

vendor/k8s.io/apiserver/pkg/util/flowcontrol/request/width.go

@@ -0,0 +1,113 @@
+/*
+Copyright 2021 The Kubernetes 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.
+*/
+
+package request
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+
+	apirequest "k8s.io/apiserver/pkg/endpoints/request"
+	"k8s.io/klog/v2"
+)
+
+// WorkEstimate carries three of the four parameters that determine the work in a request.
+// The fourth parameter is the duration of the initial phase of execution.
+type WorkEstimate struct {
+	// InitialSeats is the number of seats occupied while the server is
+	// executing this request.
+	InitialSeats uint64
+
+	// FinalSeats is the number of seats occupied at the end,
+	// during the AdditionalLatency.
+	FinalSeats uint64
+
+	// AdditionalLatency specifies the additional duration the seats allocated
+	// to this request must be reserved after the given request had finished.
+	// AdditionalLatency should not have any impact on the user experience, the
+	// caller must not experience this additional latency.
+	AdditionalLatency time.Duration
+}
+
+// MaxSeats returns the maximum number of seats the request occupies over the
+// phases of being served.
+func (we *WorkEstimate) MaxSeats() int {
+	if we.InitialSeats >= we.FinalSeats {
+		return int(we.InitialSeats)
+	}
+
+	return int(we.FinalSeats)
+}
+
+// objectCountGetterFunc represents a function that gets the total
+// number of objects for a given resource.
+type objectCountGetterFunc func(string) (int64, error)
+
+// watchCountGetterFunc represents a function that gets the total
+// number of watchers potentially interested in a given request.
+type watchCountGetterFunc func(*apirequest.RequestInfo) int
+
+// NewWorkEstimator estimates the work that will be done by a given request,
+// if no WorkEstimatorFunc matches the given request then the default
+// work estimate of 1 seat is allocated to the request.
+func NewWorkEstimator(objectCountFn objectCountGetterFunc, watchCountFn watchCountGetterFunc, config *WorkEstimatorConfig) WorkEstimatorFunc {
+	estimator := &workEstimator{
+		minimumSeats:          config.MinimumSeats,
+		maximumSeats:          config.MaximumSeats,
+		listWorkEstimator:     newListWorkEstimator(objectCountFn, config),
+		mutatingWorkEstimator: newMutatingWorkEstimator(watchCountFn, config),
+	}
+	return estimator.estimate
+}
+
+// WorkEstimatorFunc returns the estimated work of a given request.
+// This function will be used by the Priority & Fairness filter to
+// estimate the work of of incoming requests.
+type WorkEstimatorFunc func(request *http.Request, flowSchemaName, priorityLevelName string) WorkEstimate
+
+func (e WorkEstimatorFunc) EstimateWork(r *http.Request, flowSchemaName, priorityLevelName string) WorkEstimate {
+	return e(r, flowSchemaName, priorityLevelName)
+}
+
+type workEstimator struct {
+	// the minimum number of seats a request must occupy
+	minimumSeats uint64
+	// the maximum number of seats a request can occupy
+	maximumSeats uint64
+	// listWorkEstimator estimates work for list request(s)
+	listWorkEstimator WorkEstimatorFunc
+	// mutatingWorkEstimator calculates the width of mutating request(s)
+	mutatingWorkEstimator WorkEstimatorFunc
+}
+
+func (e *workEstimator) estimate(r *http.Request, flowSchemaName, priorityLevelName string) WorkEstimate {
+	requestInfo, ok := apirequest.RequestInfoFrom(r.Context())
+	if !ok {
+		klog.ErrorS(fmt.Errorf("no RequestInfo found in context"), "Failed to estimate work for the request", "URI", r.RequestURI)
+		// no RequestInfo should never happen, but to be on the safe side let's return maximumSeats
+		return WorkEstimate{InitialSeats: e.maximumSeats}
+	}
+
+	switch requestInfo.Verb {
+	case "list":
+		return e.listWorkEstimator.EstimateWork(r, flowSchemaName, priorityLevelName)
+	case "create", "update", "patch", "delete":
+		return e.mutatingWorkEstimator.EstimateWork(r, flowSchemaName, priorityLevelName)
+	}
+
+	return WorkEstimate{InitialSeats: e.minimumSeats}
+}