RGW JaegerTracing Doubt

Hello everyone, My `req_state*` is containing spans for a particular request to trace that request, but as we know req_state is not available everywhere I tried to insert a req_state variable in CephContext class because every portion of RGW has access to it and so they will also have access to req_state, but this wont work because it is on time initialized and when request run in parallel race condition might occur and traces will be inaccurate. The Second method I tried was to include req_state in RGWRadosStore and RGWUserCtl because these are accessible to every function which I want to trace, but again these also have race condition risk. Can anyone give me any tip how to make req_state available in all functions(if not all then majority) particularly this functions like RGWRadosStore and RGWUserCtl Thank You.