Re: wireshark's RPC-over-RDMA dissector

[Parav Pandit <pandit.parav@gmail.com>]

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


On Wed, Nov 9, 2016 at 9:35 PM, Chuck Lever <chuck.lever@oracle.com> 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=3Dcel/wireshark.git;a=3Dshortlog;h=3Drefs/hea=
ds/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:
>         =E2=80=A2 There does not appear to be any support for dissecting
>           RPC-over-RDMA on iWARP or RoCE
>         =E2=80=A2 The NFS dissector does not handle portions of the XDR
>           stream that were transmitted via RDMA Read/Write
>         =E2=80=A2 RPC messages conveyed via RDMA_NOMSG are not recognized
>           or dissected
>         =E2=80=A2 There is no association between RDMA Reads and Writes
>           and the RPC-over-RDMA message they go with
>         =E2=80=A2 A CREQ / CREP pair are needed to identify which QP
>           numbers are used for RPC-over-RDMA traffic
>         =E2=80=A2 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
>         =E2=80=A2 Not enough error detection in the dissector
>
> --
> Chuck Lever
>
>
>
> --
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