On Thu, May 04, 2017 at 12:01:29PM -0400, Chuck Lever wrote: > > > On May 4, 2017, at 9:45 AM, Chuck Lever <chuck.lever@xxxxxxxxxx> wrote: > > > > - Testing with a Linux server shows that the basic NFS/RDMA pieces > > work, but any OPEN operation gets NFS4ERR_GRACE, forever, when I use > > nconnect > 1. I'm looking into it. > > Reproduced with NFSv4.1, TCP, and nconnect=2. > > 363 /* > 364 * RFC5661 18.51.3 > 365 * Before RECLAIM_COMPLETE done, server should deny new lock > 366 */ > 367 if (nfsd4_has_session(cstate) && > 368 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, > 369 &cstate->session->se_client->cl_flags) && > 370 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) > 371 return nfserr_grace; > > Server-side instrumentation confirms: > > May 4 11:28:29 klimt kernel: nfsd4_open: has_session returns true > May 4 11:28:29 klimt kernel: nfsd4_open: RECLAIM_COMPLETE is false > May 4 11:28:29 klimt kernel: nfsd4_open: claim_type is 0 > > Network capture shows the RPCs are interleaved between the two > connections as the client establishes its lease, and that appears > to be confusing the server. > > C1: NULL -> NFS4_OK > C1: EXCHANGE_ID -> NFS4_OK > C2: CREATE_SESSION -> NFS4_OK > C1: RECLAIM_COMPLETE -> NFS4ERR_CONN_NOT_BOUND_TO_SESSION What security flavors are involved? I believe the correct behavior depends on whether gss is in use or not. --b. > C1: PUTROOTFH | GETATTR -> NFS4ERR_SEQ_MISORDERED > C2: SEQUENCE -> NFS4_OK > C1: PUTROOTFH | GETATTR -> NFS4ERR_CONN_NOT_BOUND_TO_SESSION > C1: BIND_CONN_TO_SESSION -> NFS4_OK > C2: BIND_CONN_TO_SESSION -> NFS4_OK > C2: PUTROOTFH | GETATTR -> NFS4ERR_SEQ_MISORDERED > > .... mix of GETATTRs and other simple requests .... > > C1: OPEN -> NFS4ERR_GRACE > C2: OPEN -> NFS4ERR_GRACE > > The RECLAIM_COMPLETE operation failed, and the client does not > retry it. That leaves its lease stuck in GRACE. > > > -- > Chuck Lever > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
