// 1) Cold listing, just list.
	// 2) Returning, but with no id. Start async listing.
	// 3) Returning, with ID, stream from list.
	//
	// If we don't have a list id we must ask the server if it has a cache or create a new.
	if o.ID != "" && !o.Transient {
		// Create or ping with handout...
		rpc := globalNotificationSys.restClientFromHash(pathJoin(o.Bucket, o.Prefix))
		var c *metacache
		if rpc == nil {

package http

import (
	"context"
	"crypto/tls"
	"crypto/x509"
	"net/http"
	"syscall"
	"time"

	"github.com/minio/pkg/v2/certs"
)

// tlsClientSessionCacheSize is the cache size for client sessions.
var tlsClientSessionCacheSize = 100

// ConnSettings - contains connection settings.
type ConnSettings struct {

	if !s.checkID(params.DiskID) {
		return grid.NewRemoteErr(errDiskNotFound)
	}
	if params.Cache == nil {
		return grid.NewRemoteErrString("NSScannerHandler: provided cache is nil")
	}

	// Collect updates, stream them before the full cache is sent.
	updates := make(chan dataUsageEntry, 1)
	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		defer wg.Done()

}

func runDNSCache(ctx *cli.Context) {
	dnsTTL := ctx.Duration("dns-cache-ttl")
	// Check if we have configured a custom DNS cache TTL.
	if dnsTTL <= 0 {
		if orchestrated {
			dnsTTL = 30 * time.Second
		} else {
			dnsTTL = 10 * time.Minute
		}
	}

	// Call to refresh will refresh names in cache.
	go func() {
		// Baremetal setups set DNS refresh window up to dnsTTL duration.

					if filterLifecycle(bi.Name, version.Name, version) {
						continue
					}

					// `.usage-cache.bin` still exists, must be not readable ignore it.
					if bi.Name == minioMetaBucket && strings.Contains(version.Name, dataUsageCacheName) {
						// skipping bucket usage cache name, as its autogenerated.
						continue
					}

					versionsFound++
				}
			}); err != nil {

	"acl",
	"cors",
	"delete",
	"encryption",
	"legal-hold",
	"lifecycle",
	"location",
	"logging",
	"notification",
	"partNumber",
	"policy",
	"requestPayment",
	"response-cache-control",
	"response-content-disposition",
	"response-content-encoding",
	"response-content-language",
	"response-content-type",
	"response-expires",
	"retention",
	"select",
	"select-type",
	"tagging",

func isValidLocation(location string) bool {
	return globalSite.Region == "" || globalSite.Region == location
}

// Supported headers that needs to be extracted.
var supportedHeaders = []string{
	"content-type",
	"cache-control",
	"content-language",
	"content-encoding",
	"content-disposition",
	"x-amz-storage-class",
	xhttp.AmzStorageClass,
	xhttp.AmzObjectTagging,
	"expires",
	xhttp.AmzBucketReplicationStatus,

	}
	data := ListVersionsResponse{}
	var lastObjMetaName string
	var tagErr, metaErr APIErrorCode = -1, -1

	for _, object := range resp.Objects {
		if object.Name == "" {
			continue
		}
		// Cache checks for the same object
		if metadata != nil && lastObjMetaName != object.Name {
			tagErr = metadata(object.Name, policy.GetObjectTaggingAction)
			metaErr = metadata(object.Name, policy.GetObjectAction)

				return
			}
		case "Cache":
			var zb0002 uint32
			zb0002, err = dc.ReadMapHeader()
			if err != nil {
				err = msgp.WrapError(err, "Cache")
				return
			}
			if z.Cache == nil {
				z.Cache = make(map[string]dataUsageEntry, zb0002)
			} else if len(z.Cache) > 0 {
				for key := range z.Cache {
					delete(z.Cache, key)
				}
			}
			for zb0002 > 0 {
				zb0002--

package cmd

import (
	"context"
)

const (
	memTotal     = "total"
	memUsed      = "used"
	memFree      = "free"
	memBuffers   = "buffers"
	memCache     = "cache"
	memUsedPerc  = "used_perc"
	memShared    = "shared"
	memAvailable = "available"
)

var (
	memTotalMD     = NewGaugeMD(memTotal, "Total memory on the node")