> On Nov 9, 2016, at 11:41 AM, Parav Pandit <pandit.parav@xxxxxxxxx> wrote: > > Hi Chuck, > > Just FYI. > I have committed few fixes in wireshark trunk for RoCE and IB > dissectors which will in general benefit other ULPs as well (primary > for statefulness of ULPs) last month. > > I have few patches pending in my sandbox in area of RoCE and for other > ULP that I will push in coming days, likely next week. > I am currently actively testing them and have made steady progress so far. > > I will try to find sometime to review them next week. > > Regards, > Parav Pandit Stateful dissection might be helpful for associating RPC-over-RDMA headers with RDMA Reads and Writes on the same QP. Thanks Parav, I'll watch for your work. > On Wed, Nov 9, 2016 at 9:35 PM, Chuck Lever <chuck.lever@xxxxxxxxxx> wrote: >> Hi- >> >> Thanks to Yan Berman, for a couple of years now we've had a basic >> RPC-over-RDMA dissector in wireshark that can be used with ibdump >> captures. There have been some bugs noted, but no-one has had the >> cycles to dig in and address. >> >> Recently Tom Haynes helped me set up my own wireshark build so I >> could help address some of the known issues. >> >> http://git.linux-nfs.org/?p=cel/wireshark.git;a=shortlog;h=refs/heads/rpc-rdma-fixes >> >> Posting here for review before I take the next steps to push these >> to the wireshark community. Constructive critique and other >> suggestions are welcome. >> >> The fixes so far focus on dissecting transport headers correctly. >> There continue to be significant open issues with the dissector: >> • There does not appear to be any support for dissecting >> RPC-over-RDMA on iWARP or RoCE >> • The NFS dissector does not handle portions of the XDR >> stream that were transmitted via RDMA Read/Write >> • RPC messages conveyed via RDMA_NOMSG are not recognized >> or dissected >> • There is no association between RDMA Reads and Writes >> and the RPC-over-RDMA message they go with >> • A CREQ / CREP pair are needed to identify which QP >> numbers are used for RPC-over-RDMA traffic >> • With TCP, the dissector fully outdents the RPC and NFS >> dissection results; but with RDMA, the dissector places >> the results in the tree under the Infiniband header >> • Not enough error detection in the dissector >> >> -- >> Chuck Lever -- 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
