if err != nil {
		return nil, err
	}

	newChunkHdr := fmt.Appendf(nil, "%s"+s3ChunkSignatureStr+"%s\r\n",
		hexChunkSize, chunkSignature)
	newChunk, err := io.ReadAll(bufReader)
	if err != nil {
		return nil, err
	}
	newReq := req
	newReq.Body = io.NopCloser(
		bytes.NewReader(bytes.Join([][]byte{newChunkHdr, newChunk[:len(newChunk)/2]},
			[]byte(""))),
	)

	ctx := r.Context()

	objectAPI, _ := validateAdminReq(ctx, w, r, policy.AddUserToGroupAdminAction)
	if objectAPI == nil {
		return
	}

	data, err := io.ReadAll(r.Body)
	if err != nil {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
		return
	}

	var updReq madmin.GroupAddRemove
	err = json.Unmarshal(data, &updReq)
	if err != nil {

		buf = buf[:sz]
	} else {
		buf = make([]byte, sz)
	}

	// Read file...
	_, err = io.ReadFull(f, buf)

	return buf, stat.ModTime().UTC(), osErrToFileErr(err)
}

// ReadAll is a raw call, reads content at any path and returns the buffer.
func (s *xlStorage) ReadAll(ctx context.Context, volume string, path string) (buf []byte, err error) {

		return
	}
	start, err := f.DataOffset()
	if err != nil {
		t.Errorf("%v: DataOffset error=%v", f.Name, err)
		return
	}
	got, err := io.ReadAll(rw)
	if err != nil {
		t.Errorf("%v: OpenRaw ReadAll error=%v", f.Name, err)
		return
	}
	end := uint64(start) + f.CompressedSize64
	want := raw[start:end]
	if !bytes.Equal(got, want) {
		t.Logf("got %q", got)

		{
			volume: "ab",
			path:   "as-file",
			err:    errVolumeNotFound,
		},
	}

	var dataRead []byte
	// Run through all the test cases and validate for ReadAll.
	for i, testCase := range testCases {
		dataRead, err = xlStorage.ReadAll(t.Context(), testCase.volume, testCase.path)
		if err != testCase.err {
			t.Errorf("TestXLStorage %d: Expected err \"%v\", got err \"%v\"", i+1, testCase.err, err)
			continue
		}

		})
	}
}

func TestReaderReset(t *testing.T) {
	checkAll := func(r *Reader, want string) {
		t.Helper()
		all, err := io.ReadAll(r)
		if err != nil {
			t.Fatal(err)
		}
		if string(all) != want {
			t.Errorf("ReadAll returned %q, want %q", all, want)
		}
	}

	r := NewReader(strings.NewReader("foo foo"))
	buf := make([]byte, 3)
	r.Read(buf)

	ctx := r.Context()

	objectAPI, creds := validateAdminReq(ctx, w, r, policy.StartBatchJobAction)
	if objectAPI == nil {
		return
	}

	buf, err := io.ReadAll(xioutil.HardLimitReader(r.Body, humanize.MiByte*4))
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	user := creds.AccessKey
	if creds.ParentUser != "" {

		zb0001--
		field, err = dc.ReadMapKeyPtr()
		if err != nil {
			err = msgp.WrapError(err)
			return
		}
		switch msgp.UnsafeString(field) {
		case "V2Obj":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "ObjectV2")
					return
				}
				z.ObjectV2 = nil
			} else {
				if z.ObjectV2 == nil {
					z.ObjectV2 = new(struct {

			z.CurrentBandwidthInBytesPerSecond, err = dc.ReadFloat64()
			if err != nil {
				err = msgp.WrapError(err, "CurrentBandwidthInBytesPerSecond")
				return
			}
		case "lt":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "XferRateLrg")
					return
				}
				z.XferRateLrg = nil
			} else {
				if z.XferRateLrg == nil {
					z.XferRateLrg = new(XferStats)
				}

	hasFull := true
	if initial > metaDataReadDefault {
		initial = metaDataReadDefault
		hasFull = false
	}

	buf := metaDataPoolGet()[:initial]
	_, err := io.ReadFull(r, buf)
	if err != nil {
		return nil, fmt.Errorf("readXLMetaNoData(io.ReadFull): %w", err)
	}
	readMore := func(n int64) error {
		has := int64(len(buf))
		if has >= n {
			return nil
		}
		if hasFull || n > size {