err    error
	)
	switch op {
	case madmin.SiteResyncStart:
		status, err = globalSiteReplicationSys.startResync(ctx, objectAPI, peerSite)
	case madmin.SiteResyncCancel:
		status, err = globalSiteReplicationSys.cancelResync(ctx, objectAPI, peerSite)
	default:
		err = errSRInvalidRequest(errInvalidArgument)
	}
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}