days := int(math.Ceil(math.Abs(objRetention.RetainUntilDate.Sub(t).Hours()) / 24))

	ret := objectlock.GetObjectRetentionMeta(oi.UserDefined)
	if ret.Mode.Valid() {
		// Retention has expired you may change whatever you like.
		if ret.RetainUntilDate.Before(t) {
			apiErr := isPutRetentionAllowed(oi.Bucket, oi.Name,
				days, objRetention.RetainUntilDate.Time,
				objRetention.Mode, byPassSet, r, cred,
				owner)

	XMLName         xml.Name      `xml:"Retention"`
	Mode            RetMode       `xml:"Mode,omitempty"`
	RetainUntilDate RetentionDate `xml:"RetainUntilDate,omitempty"`
}

func (o ObjectRetention) String() string {
	return fmt.Sprintf("Mode: %s, RetainUntilDate: %s", o.Mode, o.RetainUntilDate.Time)
}

// Maximum 4KiB size per object retention config.
const maxObjectRetentionSize = 1 << 12

			expectedErr: ErrUnknownWORMModeDirective,
			expectErr:   true,
		},
		{
			value:       `<?xml version="1.0" encoding="UTF-8"?><Retention xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Mode>COMPLIANCE</Mode><RetainUntilDate>2017-01-02T15:04:05Z</RetainUntilDate></Retention>`,
			expectedErr: ErrPastObjectLockRetainDate,