return err
	}
	defer xhttp.DrainBody(respBody)

	pr, pw := io.Pipe()
	go func() {
		pw.CloseWithError(waitForHTTPStream(respBody, pw))
	}()
	mr := msgp.NewReader(pr)
	defer readMsgpReaderPoolPut(mr)
	for {
		var file ReadMultipleResp
		if err := file.DecodeMsg(mr); err != nil {
			if errors.Is(err, io.EOF) {
				err = nil
			}
			pr.CloseWithError(err)
			return toStorageErr(err)
		}

	if objAPI == nil {
		return errServerNotInitialized
	}

	pr, opts, err := globalTierConfigMgr.configReader(ctx)
	if err != nil {
		return err
	}

	_, err = objAPI.PutObject(ctx, minioMetaBucket, tierConfigPath, pr, *opts)
	return err
}

// NewTierConfigMgr - creates new tier configuration manager,
func NewTierConfigMgr() *TierConfigMgr {

// properly, because we do not wish to create an object even if
// client closed the stream prematurely.
func newS2CompressReader(r io.Reader, on int64, encrypted bool) (rc io.ReadCloser, idx func() []byte) {
	pr, pw := io.Pipe()
	// Copy input to compressor
	opts := compressOpts
	if encrypted {
		// The values used for padding are not a security concern,
		// but we choose pseudo-random numbers instead of just zeros.

// Wrapper
func TestPostPolicyReservedBucketExploit(t *testing.T) {
	ExecObjectLayerTestWithDirs(t, testPostPolicyReservedBucketExploit)
}

// testPostPolicyReservedBucketExploit is a test for the exploit fixed in PR
// #16849
func testPostPolicyReservedBucketExploit(obj ObjectLayer, instanceType string, dirs []string, t TestErrHandler) {
	if err := newTestConfig(globalMinioDefaultRegion, obj); err != nil {

		return nil, err
	}
	if !ok {
		return nil, os.ErrNotExist
	}

	pr, pw := io.Pipe()

	wa := &writerAt{
		buffer: make(map[int64][]byte),
		w:      pw,
		r:      pr,
		wg:     &sync.WaitGroup{},
	}
	wa.wg.Add(1)
	go func() {
		_, err := clnt.PutObject(r.Context(), bucket, object, pr, -1, minio.PutObjectOptions{
			ContentType:          mimedb.TypeByExtension(path.Ext(object)),

						return entries, io.EOF
					}
				}
			}

			pr, pw := io.Pipe()
			go func() {
				werr := er.getObjectWithFileInfo(ctx, minioMetaBucket, o.objectPath(partN), 0,
					fi.Size, pw, fi, metaArr, onlineDisks)
				pw.CloseWithError(werr)
			}()

			tmp := newMetacacheReader(pr)
			e, err := tmp.filter(o)
			pr.CloseWithError(err)
			tmp.Close()
			entries.o = append(entries.o, e.o...)