From: Martin KaFai Lau <kafai@fb.com>
To: "Jiang Wang ." <jiang.wang@bytedance.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Lorenz Bauer <lmb@cloudflare.com>, bpf <bpf@vger.kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Kernel Team <kernel-team@fb.com>,
Networking <netdev@vger.kernel.org>
Subject: Re: [External] Re: [PATCH v2 bpf-next 00/14] bpf: Support calling kernel function
Date: Tue, 30 Mar 2021 21:55:22 -0700 [thread overview]
Message-ID: <20210331045522.5gigzyheib5zk2r2@kafai-mbp.dhcp.thefacebook.com> (raw)
In-Reply-To: <CAP_N_Z_+agZz4oBaGvOQY0AKxaZB=oqpU7WMEugAEftOkx45eA@mail.gmail.com>
On Tue, Mar 30, 2021 at 08:28:34PM -0700, Jiang Wang . wrote:
> I am working with Cong to get Clang/LLVM-13 to test. But I am confused
> whether CLANG/LLVM-13 is released or not.
>
> From https://apt.llvm.org/ , I saw llvm-13 was released in Feb, but it
> does not have the diff you mentioned.
I haven't used the Debian/Ubuntu nightly packages, so don't know.
>
> From the following links, I am not sure if LLVM-13 was really released
> or still in the process.
> https://llvm.org/docs/ReleaseNotes.html#external-open-source-projects-using-llvm-13
> https://github.com/llvm/llvm-project/releases
AFAIK, it is not released, so please directly clone from the llvm-project
as also suggested earlier by Pedro.
Please refer to the "how do I build LLVM" in Documentation/bpf/bpf_devel_QA.rst.
[ Please do not top post. Reply inline instead.
It will be difficult for others to follow. ]
> On Tue, Mar 30, 2021 at 2:43 PM Martin KaFai Lau <kafai@fb.com> wrote:
> >
> > On Tue, Mar 30, 2021 at 12:58:22PM -0700, Cong Wang wrote:
> > > On Tue, Mar 30, 2021 at 7:36 AM Alexei Starovoitov
> > > <alexei.starovoitov@gmail.com> wrote:
> > > >
> > > > On Tue, Mar 30, 2021 at 2:43 AM Lorenz Bauer <lmb@cloudflare.com> wrote:
> > > > >
> > > > > On Thu, 25 Mar 2021 at 01:52, Martin KaFai Lau <kafai@fb.com> wrote:
> > > > > >
> > > > > > This series adds support to allow bpf program calling kernel function.
> > > > >
> > > > > I think there are more build problems with this. Has anyone hit this before?
> > > > >
> > > > > $ CLANG=clang-12 O=../kbuild/vm ./tools/testing/selftests/bpf/vmtest.sh -j 7
> > > > >
> > > > > GEN-SKEL [test_progs-no_alu32] bind6_prog.skel.h
> > > > > libbpf: elf: skipping unrecognized data section(5) .rodata.str1.1
> > > > > GEN-SKEL [test_progs-no_alu32] bind_perm.skel.h
> > > > > libbpf: elf: skipping unrecognized data section(5) .rodata.str1.1
> > > > > GEN-SKEL [test_progs-no_alu32] bpf_cubic.skel.h
> > > > > GEN-SKEL [test_progs-no_alu32] bpf_dctcp.skel.h
> > > > > GEN-SKEL [test_progs-no_alu32] bpf_flow.skel.h
> > > > > libbpf: failed to find BTF for extern 'tcp_cong_avoid_ai' [27] section: -2
> > > > > Error: failed to open BPF object file: No such file or directory
> > > >
> > > > The doc update is on its way:
> > > > https://patchwork.kernel.org/project/netdevbpf/patch/20210330054156.2933804-1-kafai@fb.com/
> > >
> > > We just updated our clang to 13, and I still get the same error above.
> > Please check if the llvm/clang has this diff
> > https://reviews.llvm.org/D93563
prev parent reply other threads:[~2021-03-31 4:56 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 1:51 [PATCH v2 bpf-next 00/14] bpf: Support calling kernel function Martin KaFai Lau
2021-03-25 1:51 ` [PATCH v2 bpf-next 01/14] bpf: Simplify freeing logic in linfo and jited_linfo Martin KaFai Lau
2021-03-25 1:51 ` [PATCH v2 bpf-next 02/14] bpf: Refactor btf_check_func_arg_match Martin KaFai Lau
2021-03-25 1:51 ` [PATCH v2 bpf-next 03/14] bpf: Support bpf program calling kernel function Martin KaFai Lau
2021-03-25 22:02 ` Toke Høiland-Jørgensen
2021-03-25 23:09 ` Martin KaFai Lau
2021-03-26 10:11 ` Toke Høiland-Jørgensen
2021-03-26 14:20 ` Alexei Starovoitov
2021-03-26 15:14 ` Toke Høiland-Jørgensen
2021-03-27 3:59 ` Alexei Starovoitov
2021-03-25 1:51 ` [PATCH v2 bpf-next 04/14] bpf: Support kernel function call in x86-32 Martin KaFai Lau
2021-03-25 1:51 ` [PATCH v2 bpf-next 05/14] tcp: Rename bictcp function prefix to cubictcp Martin KaFai Lau
2021-03-25 1:52 ` [PATCH v2 bpf-next 06/14] bpf: tcp: Put some tcp cong functions in allowlist for bpf-tcp-cc Martin KaFai Lau
2021-03-25 1:52 ` [PATCH v2 bpf-next 07/14] libbpf: Refactor bpf_object__resolve_ksyms_btf_id Martin KaFai Lau
2021-03-25 1:52 ` [PATCH v2 bpf-next 08/14] libbpf: Refactor codes for finding btf id of a kernel symbol Martin KaFai Lau
2021-03-25 1:52 ` [PATCH v2 bpf-next 09/14] libbpf: Rename RELO_EXTERN to RELO_EXTERN_VAR Martin KaFai Lau
2021-03-25 1:52 ` [PATCH v2 bpf-next 10/14] libbpf: Record extern sym relocation first Martin KaFai Lau
2021-03-25 1:52 ` [PATCH v2 bpf-next 11/14] libbpf: Support extern kernel function Martin KaFai Lau
2021-03-25 1:52 ` [PATCH v2 bpf-next 12/14] bpf: selftests: Rename bictcp to bpf_cubic Martin KaFai Lau
2021-03-25 1:52 ` [PATCH v2 bpf-next 13/14] bpf: selftests: bpf_cubic and bpf_dctcp calling kernel functions Martin KaFai Lau
2021-03-25 1:52 ` [PATCH v2 bpf-next 14/14] bpf: selftests: Add kfunc_call test Martin KaFai Lau
2021-03-27 3:50 ` [PATCH v2 bpf-next 00/14] bpf: Support calling kernel function patchwork-bot+netdevbpf
2021-03-27 21:25 ` Cong Wang
2021-03-27 21:28 ` Alexei Starovoitov
2021-03-27 22:07 ` Cong Wang
2021-03-27 22:53 ` Alexei Starovoitov
2021-03-28 20:13 ` Cong Wang
2021-03-29 1:24 ` Martin KaFai Lau
2021-03-29 16:06 ` Lorenz Bauer
2021-03-29 19:08 ` Martin KaFai Lau
2021-03-31 6:44 ` Andrii Nakryiko
2021-04-01 19:51 ` Martin KaFai Lau
2021-04-01 19:52 ` Andrii Nakryiko
2021-03-29 20:18 ` Cong Wang
2021-03-30 9:43 ` Lorenz Bauer
2021-03-30 14:35 ` Alexei Starovoitov
2021-03-30 19:58 ` Cong Wang
2021-03-30 21:43 ` Martin KaFai Lau
2021-03-31 3:28 ` [External] " Jiang Wang .
2021-03-31 4:55 ` Martin KaFai Lau [this message]
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