This is functionality is going to be important for our customers. RDMA / RoCE are used extensively in our clusters, and we're going to run into more cases where people need to be able to trace the RDMA traffic. There are other tools in Ubuntu to manage OFED devices and RDMA, so RDMA support is there in general, but this one piece is missing. In short, tcpdump is intended to capture a variety of traffic protocols, and RDMA is one of those protocols which is seeing increased use.
Apparently Fedora has already created an RDMA enabled libpcap. A container based on fedora:latest is able to capture RDMA traffic with tcpdump. Is there maybe something there that could be leveraged? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2006557 Title: Enable rdma-sniffer for libpcap Status in libpcap package in Ubuntu: Incomplete Status in linux package in Ubuntu: Invalid Status in linux source package in Lunar: Invalid Status in libpcap package in Debian: Won't Fix Bug description: Hi, The request is to build and configure stock package libpcap with rdma-sniffer enabled. We'd like users of rdma devices to be able to sniff on them using stock tcpdump. Currently when using default tcpdump It does not list rdma devices. $ tcpdump -D |grep -i rdma $ when using locally build tcpdump (with rdma enabled) $ cd <tcpdump source folder> $ ./tcpdump -D |grep -i rdma 24.rocep4s0 (RDMA sniffer) 25.rocep7s0f0 (RDMA sniffer) 26.rocep7s0f1 (RDMA sniffer) 27.rocep10s0f0 (RDMA sniffer) 28.rocep10s0f1 (RDMA sniffer) 29.rocep33s0f0 (RDMA sniffer) 30.rocep33s0f1 (RDMA sniffer) 31.rocep36s0f0 (RDMA sniffer) 32.ibp36s0f1 (RDMA sniffer) Locally build steps: clone sources: $ mkdir tcpdumpbuild $ cd tcpdumpbuild/ $ git clone https://github.com/the-tcpdump-group/tcpdump.git $ git clone https://github.com/the-tcpdump-group/libpcap.git install required packages (including rdma packages so libpcap is built with rdma enabled): $ apt install flex bison librdmacm-dev librdmacm1 rdma-core rdmacm-utils configure and build $ cd libpcap $ ./autogen.sh $ ./configure --enable-rdma=yes $ make cd ../tcpdump/ ./autogen.sh ./configure $ make now ./tcpdump -D can show rdma devices. Thanks ! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libpcap/+bug/2006557/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
