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 -- 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
