From: Stephen Hemminger <stephen@networkplumber.org>
To: Luca Boccassi <bluca@debian.org>
Cc: dev@dpdk.org
Subject: Re: [PATCH v5 7/8] net/tap: use libbpf to load new BPF program
Date: Thu, 4 Apr 2024 08:51:50 -0700 [thread overview]
Message-ID: <20240404085150.20563f01@hermes.local> (raw)
In-Reply-To: <CAMw=ZnR3vP5pVwauNSqugNJJzx-XfTvGHY2shTUq+vyFtx_TLQ@mail.gmail.com>
On Thu, 4 Apr 2024 01:49:56 +0100
Luca Boccassi <bluca@debian.org> wrote:
> On Thu, 4 Apr 2024 at 00:41, Stephen Hemminger
> <stephen@networkplumber.org> wrote:
> >
> > On Wed, 3 Apr 2024 22:19:20 +0100
> > Luca Boccassi <bluca@debian.org> wrote:
> >
> > > On Wed, 3 Apr 2024 at 16:55, Stephen Hemminger
> > > <stephen@networkplumber.org> wrote:
> > > >
> > > > On Wed, 03 Apr 2024 12:50:35 +0100
> > > > Luca Boccassi <bluca@debian.org> wrote:
> > > >
> > > > > Using bpftool to generate the header at build time is a bit icky,
> > > > > because it will look at sysfs on the build system, which is from the
> > > > > running kernel. But a build system's kernel might be some ancient LTS,
> > > > > and even be a completely different kconfig/build/distro from the actual
> > > > > runtime one.
> > > >
> > > > One other option would be to ship a pre-built skeleton file.
> > > > Which is what the method the old code did.
> > > > But that creates an implied dependency on the developers machine build environment.
> > >
> > > That's what the distro-provided vmlinux.h should help with - by
> > > #include'ing that, it should be possible to build a co-re bpf program,
> > > no other artifacts needed. You can try it out locally by generating it
> > > from the local running kernel on your dev machine:
> > >
> > > bpftool btf dump file /sys/kernel/btf/vmlinux format c > vmlinux.h
> >
> > Not all distros are providing vmlinux.h.
> > And some like Ubuntu haven't figured out how to package bpftool and libbpf correctly.
>
> Yes and for those the usual pattern is a fallback to generate at build
> time, if no pre-prepared vmlinux.h is configured
Looks like vmlinux.h is not setup to handle tc programs.
If vmlinux.h is included, it supersedes other kernel headers (ok).
But is missing some other things like IPv6 options, ether types, and
TC actions. To use it requires copy pasting from other headers
to fill in the missing pieces. Thats a mess.
This little program only refers to skb and the fields that are problematic
are protocol, mark, and queue_mapping.
next prev parent reply other threads:[~2024-04-04 15:51 UTC|newest]
Thread overview: 202+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-30 3:46 [RFC 0/2] net/tap RSS BPF rewrite Stephen Hemminger
2024-01-30 3:46 ` [RFC 1/2] tap: stop "vendoring" linux bpf headers Stephen Hemminger
2024-01-30 3:46 ` [RFC 2/2] tap: rework BPF handling Stephen Hemminger
2024-02-07 22:11 ` [PATCH v2 0/7] net/tap: RSS using BPF overhaul Stephen Hemminger
2024-02-07 22:11 ` [PATCH v2 1/7] net/tap: remove unused RSS hash types Stephen Hemminger
2024-02-07 22:11 ` [PATCH v2 2/7] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-02-07 22:11 ` [PATCH v2 3/7] net/tap: stop "vendoring" linux bpf headers Stephen Hemminger
2024-02-07 22:11 ` [PATCH v2 4/7] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-02-07 22:11 ` [PATCH v2 5/7] net/tap: use libbpf to load new " Stephen Hemminger
2024-02-07 22:11 ` [PATCH v2 6/7] net/tap: remove no longer used files Stephen Hemminger
2024-02-07 22:11 ` [PATCH v2 7/7] MAINTAINERS: add maintainer for TAP device Stephen Hemminger
2024-02-08 7:01 ` Morten Brørup
2024-02-08 17:41 ` [PATCH v3 0/7] net/tap: RSS using BPF overhaul Stephen Hemminger
2024-02-08 17:41 ` [PATCH v3 1/7] net/tap: remove unused RSS hash types Stephen Hemminger
2024-02-08 17:41 ` [PATCH v3 2/7] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-02-08 17:41 ` [PATCH v3 3/7] tap: stop "vendoring" linux bpf headers Stephen Hemminger
2024-02-08 17:41 ` [PATCH v3 4/7] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-02-08 17:41 ` [PATCH v3 5/7] net/tap: use libbpf to load new " Stephen Hemminger
2024-02-08 18:02 ` Stephen Hemminger
2024-02-08 17:41 ` [PATCH v3 6/7] net/tap: remove no longer used files Stephen Hemminger
2024-02-08 17:41 ` [PATCH v3 7/7] MAINTAINERS: add maintainer for TAP device Stephen Hemminger
2024-02-08 19:05 ` [PATCH v4 0/7] net/tap: queue flow action RSS using BPF redo Stephen Hemminger
2024-02-08 19:05 ` [PATCH v4 1/7] net/tap: remove unused RSS hash types Stephen Hemminger
2024-02-08 19:05 ` [PATCH v4 2/7] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-02-08 19:05 ` [PATCH v4 3/7] tap: stop "vendoring" linux bpf headers Stephen Hemminger
2024-02-08 19:05 ` [PATCH v4 4/7] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-02-10 0:54 ` Ferruh Yigit
2024-02-10 2:09 ` Stephen Hemminger
2024-02-28 17:27 ` Ferruh Yigit
2024-02-29 23:39 ` Stephen Hemminger
2024-02-08 19:05 ` [PATCH v4 5/7] net/tap: use libbpf to load new " Stephen Hemminger
2024-02-08 20:39 ` Stephen Hemminger
2024-02-08 19:05 ` [PATCH v4 6/7] net/tap: remove no longer used files Stephen Hemminger
2024-02-08 19:05 ` [PATCH v4 7/7] MAINTAINERS: add maintainer for TAP device Stephen Hemminger
2024-02-12 16:47 ` [PATCH v4 0/7] net/tap: queue flow action RSS using BPF redo Stephen Hemminger
2024-04-02 17:12 ` [PATCH v5 0/8] net/tap: cleanups and fix BPF flow Stephen Hemminger
2024-04-02 17:12 ` [PATCH v5 1/8] net/tap: do not duplicate fd's Stephen Hemminger
2024-04-02 17:12 ` [PATCH v5 2/8] doc: fix the requirements and building of TAP flow Stephen Hemminger
2024-04-02 17:12 ` [PATCH v5 3/8] net/tap: remove unused RSS hash types Stephen Hemminger
2024-04-02 17:12 ` [PATCH v5 4/8] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-04-02 17:12 ` [PATCH v5 5/8] net/tap: stop "vendoring" linux bpf headers Stephen Hemminger
2024-04-02 17:12 ` [PATCH v5 6/8] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-04-02 17:12 ` [PATCH v5 7/8] net/tap: use libbpf to load new " Stephen Hemminger
2024-04-03 11:50 ` Luca Boccassi
2024-04-03 14:53 ` Stephen Hemminger
2024-04-03 15:55 ` Stephen Hemminger
2024-04-03 21:19 ` Luca Boccassi
2024-04-03 23:41 ` Stephen Hemminger
2024-04-04 0:49 ` Luca Boccassi
2024-04-04 15:51 ` Stephen Hemminger [this message]
2024-04-04 16:12 ` Luca Boccassi
2024-04-04 15:30 ` Stephen Hemminger
2024-04-04 16:11 ` Luca Boccassi
2024-04-02 17:12 ` [PATCH v5 8/8] net/tap: remove no longer used files Stephen Hemminger
2024-04-02 20:43 ` Stephen Hemminger
2024-04-05 21:14 ` [PATCH v6 0/8] net/tap: cleanup and fix BPF flow support Stephen Hemminger
2024-04-05 21:14 ` [PATCH v6 1/8] net/tap: do not duplicate fd's Stephen Hemminger
2024-04-05 21:14 ` [PATCH v6 2/8] doc: fix the requirements and building of TAP flow Stephen Hemminger
2024-04-05 21:14 ` [PATCH v6 3/8] net/tap: remove unused fields Stephen Hemminger
2024-04-05 21:14 ` [PATCH v6 4/8] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-04-05 21:14 ` [PATCH v6 5/8] net/tap: stop "vendoring" linux bpf headers Stephen Hemminger
2024-04-05 21:14 ` [PATCH v6 6/8] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-04-05 21:14 ` [PATCH v6 7/8] net/tap: use libbpf to load new " Stephen Hemminger
2024-04-05 21:15 ` [PATCH v6 8/8] net/tap: remove no longer used files Stephen Hemminger
2024-04-08 21:18 ` [PATCH v7 0/8] net/tap: cleanups and fix BPF support Stephen Hemminger
2024-04-08 21:18 ` [PATCH v7 1/8] net/tap: do not duplicate fd's Stephen Hemminger
2024-04-08 21:18 ` [PATCH v7 2/8] net/tap: remove unused fields Stephen Hemminger
2024-04-08 21:18 ` [PATCH v7 3/8] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-04-08 21:18 ` [PATCH v7 4/8] net/tap: do not build flow support if header is out of date Stephen Hemminger
2024-04-08 21:18 ` [PATCH v7 5/8] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-04-08 21:18 ` [PATCH v7 6/8] net/tap: use libbpf to load new " Stephen Hemminger
2024-04-08 21:18 ` [PATCH v7 7/8] net/tap: remove no longer used files Stephen Hemminger
2024-04-08 21:18 ` [PATCH v7 8/8] doc: update documentation of TAP PMD Stephen Hemminger
2024-04-09 3:40 ` [PATCH v8 0/8] net/tap: cleanups and fix BPF support Stephen Hemminger
2024-04-09 3:40 ` [PATCH v8 1/8] net/tap: do not duplicate fd's Stephen Hemminger
2024-04-09 3:40 ` [PATCH v8 2/8] net/tap: remove unused fields Stephen Hemminger
2024-04-09 3:40 ` [PATCH v8 3/8] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-04-09 3:40 ` [PATCH v8 4/8] net/tap: do not build flow support if header is out of date Stephen Hemminger
2024-04-09 3:40 ` [PATCH v8 5/8] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-04-09 3:40 ` [PATCH v8 6/8] net/tap: use libbpf to load new " Stephen Hemminger
2024-04-09 3:40 ` [PATCH v8 7/8] net/tap: remove no longer used files Stephen Hemminger
2024-04-09 3:40 ` [PATCH v8 8/8] doc: update documentation of TAP PMD Stephen Hemminger
2024-04-26 15:48 ` [PATCH v9 0/9] net/tap: fix RSS (BPF) support Stephen Hemminger
2024-04-26 15:48 ` [PATCH v9 1/9] net/tap: do not duplicate fd's Stephen Hemminger
2024-05-01 11:13 ` Ferruh Yigit
2024-05-01 23:53 ` Stephen Hemminger
2024-05-02 14:51 ` Ferruh Yigit
2024-05-02 16:22 ` Stephen Hemminger
2024-04-26 15:48 ` [PATCH v9 2/9] net/tap: remove unused fields Stephen Hemminger
2024-04-26 15:48 ` [PATCH v9 3/9] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-04-26 15:48 ` [PATCH v9 4/9] net/tap: do not build flow support if header is out of date Stephen Hemminger
2024-04-26 15:48 ` [PATCH v9 5/9] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-05-01 11:14 ` Ferruh Yigit
2024-04-26 15:48 ` [PATCH v9 6/9] net/tap: use libbpf to load new " Stephen Hemminger
2024-04-26 15:48 ` [PATCH v9 7/9] net/tap: remove no longer used files Stephen Hemminger
2024-04-26 15:48 ` [PATCH v9 8/9] doc: update documentation of TAP PMD Stephen Hemminger
2024-05-01 12:36 ` Ferruh Yigit
2024-04-26 15:48 ` [PATCH v9 9/9] net/tap: simplify the internal structure Stephen Hemminger
2024-05-01 11:18 ` [PATCH v9 0/9] net/tap: fix RSS (BPF) support Ferruh Yigit
2024-05-01 15:41 ` Stephen Hemminger
2024-05-01 16:11 ` [PATCH v10 0/9] net/tap: fix RSS (BPF) flow support Stephen Hemminger
2024-05-01 16:12 ` [PATCH v10 1/9] net/tap: do not duplicate fd's Stephen Hemminger
2024-05-01 16:12 ` [PATCH v10 2/9] net/tap: remove unused fields Stephen Hemminger
2024-05-01 16:12 ` [PATCH v10 3/9] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-05-01 16:12 ` [PATCH v10 4/9] net/tap: do not build flow support if header is out of date Stephen Hemminger
2024-05-01 16:12 ` [PATCH v10 5/9] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-05-01 16:12 ` [PATCH v10 6/9] net/tap: use libbpf to load new " Stephen Hemminger
2024-05-01 16:12 ` [PATCH v10 7/9] net/tap: remove no longer used files Stephen Hemminger
2024-05-01 16:12 ` [PATCH v10 8/9] net/tap: simplify internals Stephen Hemminger
2024-05-01 16:12 ` [PATCH v10 9/9] net/tap: update documentation Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 0/9] net/tap fix RSS (BPF) flow support Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 1/9] net/tap: do not duplicate fd's Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 2/9] net/tap: remove unused fields Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 3/9] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 4/9] net/tap: do not build flow support if header is out of date Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 5/9] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 6/9] net/tap: use libbpf to load new " Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 7/9] net/tap: remove no longer used files Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 8/9] net/tap: simplify internals Stephen Hemminger
2024-05-02 2:49 ` [PATCH v11 9/9] net/tap: update documentation Stephen Hemminger
2024-05-02 21:31 ` [PATCH v12 00/12] net/tap: RSS and other fixes Stephen Hemminger
2024-05-02 21:31 ` [PATCH v12 01/12] net/tap: fix fd check in flow_isolate Stephen Hemminger
2024-05-20 17:46 ` Ferruh Yigit
2024-05-02 21:31 ` [PATCH v12 02/12] net/tap: do not duplicate fd's Stephen Hemminger
2024-05-20 17:46 ` Ferruh Yigit
2024-05-20 18:16 ` Stephen Hemminger
2024-05-02 21:31 ` [PATCH v12 03/12] net/tap: remove unused fields Stephen Hemminger
2024-05-20 17:46 ` Ferruh Yigit
2024-05-02 21:31 ` [PATCH v12 04/12] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-05-20 17:47 ` Ferruh Yigit
2024-05-21 2:01 ` Stephen Hemminger
2024-05-21 14:17 ` Ferruh Yigit
2024-05-02 21:31 ` [PATCH v12 05/12] net/tap: do not build flow support if header is out of date Stephen Hemminger
2024-05-20 17:47 ` Ferruh Yigit
2024-05-02 21:31 ` [PATCH v12 06/12] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-05-02 21:31 ` [PATCH v12 07/12] net/tap: use libbpf to load new " Stephen Hemminger
2024-05-20 17:49 ` Ferruh Yigit
2024-05-20 18:18 ` Stephen Hemminger
2024-05-20 21:42 ` Luca Boccassi
2024-05-20 22:08 ` Ferruh Yigit
2024-05-20 22:25 ` Luca Boccassi
2024-05-20 23:20 ` Stephen Hemminger
2024-05-20 22:06 ` Ferruh Yigit
2024-05-21 4:23 ` Patrick Robb
2024-05-21 13:46 ` Ferruh Yigit
2024-05-21 14:33 ` Patrick Robb
2024-05-21 15:06 ` Aaron Conole
2024-05-21 15:41 ` Stephen Hemminger
2024-05-02 21:31 ` [PATCH v12 08/12] net/tap: remove no longer used files Stephen Hemminger
2024-05-20 17:50 ` Ferruh Yigit
2024-05-02 21:31 ` [PATCH v12 09/12] net/tap: simplify internals Stephen Hemminger
2024-05-20 17:51 ` Ferruh Yigit
2024-05-21 15:44 ` Stephen Hemminger
2024-05-02 21:31 ` [PATCH v12 10/12] net/tap: remove extraneous newlines Stephen Hemminger
2024-05-20 17:51 ` Ferruh Yigit
2024-05-02 21:31 ` [PATCH v12 11/12] net/tap: do not mark queue full as error Stephen Hemminger
2024-05-20 17:52 ` Ferruh Yigit
2024-05-21 15:46 ` Stephen Hemminger
2024-05-02 21:31 ` [PATCH v12 12/12] net/tap: update documentation Stephen Hemminger
2024-05-20 17:53 ` Ferruh Yigit
2024-05-21 2:39 ` Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 00/11] net/tap: make RSS work again Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 01/11] net/tap: fix fd check in flow_isolate Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 02/11] net/tap: do not duplicate fd's Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 03/11] net/tap: remove unused fields Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 04/11] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 05/11] net/tap: do not build flow support if header is out of date Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 06/11] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 07/11] net/tap: use libbpf to load new " Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 08/11] net/tap: remove no longer used files Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 09/11] net/tap: simplify internals Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 10/11] net/tap: remove extraneous newlines Stephen Hemminger
2024-05-21 2:47 ` [PATCH v13 11/11] net/tap: update documentation Stephen Hemminger
2024-05-21 14:19 ` [PATCH v13 00/11] net/tap: make RSS work again Ferruh Yigit
2024-05-21 14:35 ` Ferruh Yigit
2024-05-21 14:38 ` Ferruh Yigit
2024-05-21 21:23 ` Patrick Robb
2024-05-21 21:26 ` Ferruh Yigit
2024-05-21 17:06 ` [PATCH v14 " Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 01/11] net/tap: fix fd check in flow_isolate Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 02/11] net/tap: do not duplicate fd's Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 03/11] net/tap: remove unused fields Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 04/11] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 05/11] net/tap: do not build flow support if header is out of date Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 06/11] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 07/11] net/tap: use libbpf to load new " Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 08/11] net/tap: remove no longer used files Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 09/11] net/tap: simplify internals Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 10/11] net/tap: remove extraneous newlines Stephen Hemminger
2024-05-21 17:06 ` [PATCH v14 11/11] net/tap: update documentation Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 00/11] net/tap: make RSS work again Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 01/11] net/tap: fix fd check in flow_isolate Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 02/11] net/tap: do not duplicate fd's Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 03/11] net/tap: remove unused fields Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 04/11] net/tap: validate and setup parameters for BPF RSS Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 05/11] net/tap: do not build flow support if header is out of date Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 06/11] net/tap: rewrite the RSS BPF program Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 07/11] net/tap: use libbpf to load new " Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 08/11] net/tap: remove no longer used files Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 09/11] net/tap: simplify internals Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 10/11] net/tap: remove extraneous newlines Stephen Hemminger
2024-05-21 20:12 ` [PATCH v15 11/11] net/tap: update documentation Stephen Hemminger
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