connPool := db.ConnPool
	if db.Statement != nil && db.Statement.ConnPool != nil {
		connPool = db.Statement.ConnPool
	}
	if tx, ok := connPool.(*sql.Tx); ok && tx != nil {
		return (*sql.DB)(reflect.ValueOf(tx).Elem().FieldByName("db").UnsafePointer()), nil
	}

	if dbConnector, ok := connPool.(GetDBConnector); ok && dbConnector != nil {
		if sqldb, err := dbConnector.GetDBConn(); sqldb != nil || err != nil {
			return sqldb, err
		}

			nbuf, err = syscall.ReadDirent(fd, buf)
			stop()
			if err != nil {
				if isSysErrNotDir(err) {
					return nil, errFileNotFound
				}
				return nil, osErrToFileErr(err)
			}
			if nbuf <= 0 {
				break
			}
		}
		consumed, name, typ, err := parseDirEnt(buf[boff:nbuf])
		if err != nil {
			return nil, err
		}
		boff += consumed

			return
		}
	} else {
		err = en.WriteBool(*z.Disable)
		if err != nil {
			err = msgp.WrapError(err, "Disable")
			return
		}
	}
	// write "Batch"
	err = en.Append(0xa5, 0x42, 0x61, 0x74, 0x63, 0x68)
	if err != nil {
		return
	}
	if z.Batch == nil {
		err = en.WriteNil()
		if err != nil {
			return
		}
	} else {
		err = en.WriteInt(*z.Batch)
		if err != nil {

	if GlobalKMS == nil {
		return nil, errKMSNotConfigured
	}
	keyID, kmsKey, sealedKey, err := crypto.S3.ParseMetadata(meta)
	if err != nil {
		return nil, err
	}
	extKey, err := GlobalKMS.Decrypt(context.TODO(), &kms.DecryptRequest{
		Name:           keyID,
		Ciphertext:     kmsKey,
		AssociatedData: kmsContext,
	})
	if err != nil {
		return nil, err
	}
	var objectKey crypto.ObjectKey

	if err != nil {
		return
	}
	err = en.WriteFloat64(z.CurrentBandwidthInBytesPerSecond)
	if err != nil {
		err = msgp.WrapError(err, "CurrentBandwidthInBytesPerSecond")
		return
	}
	// write "lt"
	err = en.Append(0xa2, 0x6c, 0x74)
	if err != nil {
		return
	}
	if z.XferRateLrg == nil {
		err = en.WriteNil()
		if err != nil {
			return
		}
	} else {

func (w *metacacheWriter) write(objs ...metaCacheEntry) error {
	if w == nil {
		return errors.New("metacacheWriter: nil writer")
	}
	if len(objs) == 0 {
		return nil
	}
	if w.creator != nil {
		err := w.creator()
		w.creator = nil
		if err != nil {
			return fmt.Errorf("metacacheWriter: unable to create writer: %w", err)
		}
		if w.mw == nil {
			return errors.New("metacacheWriter: writer not initialized")
		}

	}
	return false, nil
}

func (p poolMeta) save(ctx context.Context, pools []*erasureSets) error {
	if p.dontSave {
		return nil
	}
	data := make([]byte, 4, p.Msgsize()+4)

	// Initialize the header.
	binary.LittleEndian.PutUint16(data[0:2], poolMetaFormat)
	binary.LittleEndian.PutUint16(data[2:4], poolMetaVersion)

	buf, err := p.MarshalMsg(data)
	if err != nil {
		return err
	}

			isDir:   false,
			sys:     nil,
		})
		if zerr != nil {
			adminLogIf(ctx, zerr)
			return nil
		}
		header.Method = zip.Deflate
		zwriter, zerr := zipWriter.CreateHeader(header)
		if zerr != nil {
			adminLogIf(ctx, zerr)
			return nil
		}
		if _, err := io.Copy(zwriter, r); err != nil {
			adminLogIf(ctx, err)
		}
		return nil
	}

func TestMarshalUnmarshalMSSNil(t *testing.T) {
	v := MSS(nil)
	bts, err := v.MarshalMsg(nil)
	if err != nil {
		t.Fatal(err)
	}
	v2 := MSS(make(map[string]string, 1))
	left, err := v2.UnmarshalMsg(bts)
	if err != nil {
		t.Fatal(err)
	}
	if len(left) != 0 {
		t.Errorf("%d bytes left over after UnmarshalMsg(): %q", len(left), left)
	}

	left, err = msgp.Skip(bts)
	if err != nil {
		t.Fatal(err)
	}
	if len(left) > 0 {

	if err != nil {
		return
	}
	err = en.WriteTime(z.LastUpdate)
	if err != nil {
		err = msgp.WrapError(err, "LastUpdate")
		return
	}
	// write "dec"
	err = en.Append(0xa3, 0x64, 0x65, 0x63)
	if err != nil {
		return
	}
	if z.Decommission == nil {
		err = en.WriteNil()
		if err != nil {
			return
		}
	} else {
		err = z.Decommission.EncodeMsg(en)
		if err != nil {