[LU-12333] Add additional rpc flags to DEBUG_REQ_FLAGS

Thu, 20 Jun 2019 22:22:44 +0000

The PtlRPC state machine relies on flags in the ptlrpc_request structure to transition from one request state to another. When a request is in the RQ_PHASE_UNREG_RPC state there are three flags relevant to the request's ability to transition.

From ptlrpc_check_set():

                        if (req->rq_phase == RQ_PHASE_UNREG_RPC &&
                            ptlrpc_client_recv_or_unlink(req))
                                continue;

and from ptlrpc_client_recv_or_unlink():

        rc = !req->rq_req_unlinked || !req->rq_reply_unlinked ||
             req->rq_receiving_reply;

None of those three flags are printed by the DEBUG_REQ_FLAGS macro. Historically this has made it a little more difficult to troubleshoot bugs resulting in RPCs that are stuck in the unregistering state. Those flags should be added to the macro.

Whamcloud Community JIRA

[LU-12333] Add additional rpc flags to DEBUG_REQ_FLAGS