The BPF UAPI header file <linux/bpf.h> includes <linux/types.h>, which gives BPF-programs access to types e.g. __u32, __u64, __u8, etc. On Ubuntu/Debian when compiling with clang option[1] "-target bp

Hi Kanthi and Quentin, You mention token counter as the use-case, for somehow ratelimiting (TCP connections in your case?). That reminds me that Quentin implemented[1] a two-color token-bucket ratelim

(Cross-posting to iovisor-dev) Seeking input from BPF-llvm developers. How come Clang/LLVM 10+ is generating incompatible BTF-info in ELF file, and downgrading to LLVM-9 fixes the issue ?

Hi Potential PhD student, Reminder: Application deadline 15.May 2020 is really soon for our PhD position located in Sweden, at Karlstads University. See: "PhD position in Computer Science, programmabl

"Andrii Nakryiko" <andrii.nakryiko@...> wrote: I assume this is the blog post[1]: [1] https://facebookmicrosites.github.io/bpf/blog/2020/02/20/bcc-to-libbpf-howto-guide.html Thanks for writing t

"Daniel Xu" <dxu@...> wrote: I would VERY much like to see a release, because I have bpftrace scripts that depend on latest git-tree (I think it's the 'int casts' that I depend on). My scripts a

"Prashanth Fernando" <prashanth.fernando@...> wrote: You have to use CentOS-8 for TC (and XDP) support, or install a newer kernel version on CentOS-7.

"Yonghong Song" <ys114321@...> wrote: In the kernel tree it is documented here: https://github.com/torvalds/linux/blob/master/samples/bpf/README.rst But the kernel says: clang >= version 3.4.0 +

"Gary Lin" <glin@...> wrote: Thanks you Gary, for pointing this out. I added the TODO in the code, and it is still on my todo list for CPUMAP here: https://github.com/xdp-project/xdp-project/blob

"Nic Viljoen" <nick.viljoen@...> wrote: Hint, do remember that you need to download a firmware that support eBPF from Netronome's homepage. But don't be scared it is painless to update/use t

Jakub Kicinski <jakub.kicinski@...> wrote: That is an interesting use case. I myself is also guilty[1] of copying the libbpf code from the kernel and placing it on github to make my bpf-samp

Arnaldo Carvalho de Melo <acme@...> wrote: And you basically also ship a version of libbpf in this tarball: $ tar tvf ~/download/perf-4.19.0.tar.xz | grep lib/bpf drwxrwxr-x root/root 0 2018-10

Hi Jakub, Laura and Jiri Olsa (Cc others), Subj: iovisor-dev] minutes: IO Visor TSC/Dev Meeting (To: iovisor-dev <iovisor-dev@...>) I noticed from the iovisor-dev minutes that you have p

Interesting use-case of Load-Balancing 100G to 10x 10G. I would obviously choose XDP, but I'm biased ;-) I want to stress, that you have to handle, in _your_ BPF prog, how to load-balance and handle _

<santhosh.fernandes@...> wrote: Why IPFIX and not sFlow or netflow ? It depends a bit on you setup. Assuming you want to do this "inline" on the box receiving the traffic. Then you should know/l

"PJ Waskiewicz" <peter.waskiewicz.jr@...> wrote: I noticed that Arnaldo is playing with pahole (see twitter[1]) and converting dwarf into BTF (BPF Type Format), and have written a very nice step

Sebastiano Miano via iovisor-dev <iovisor-dev@...> wrote: Argh, this is likely an issue/bug due to the check xdp_map_invalid(), that was introduced in commit 7c3001313396 ("bpf: fix ri->

(Cc. iovisor-dev list) Jesper Dangaard Brouer <brouer@...> wrote: So, I figured out why this happens. What does bpftool use BFD for? I need the BFD lib and include file: /usr/include/bfd.h. Thu

Daniel Borkmann <daniel@...> wrote: Okay, you want to catch this in dev_ethtool(), that connected the dots for me, thanks. BUT it does feel a little fake and confusing to do this, as the dri

Jakub Kicinski <jakub.kicinski@...> wrote: Let's keep thing separate. I'm requesting something really simple. I want the driver to tell me what XDP actions it supports. We/I can implement an