From: Daniel Borkmann <daniel@iogearbox.net>
To: John Fastabend <john.fastabend@gmail.com>, andrii@kernel.org
Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, ast@fb.com
Subject: Re: [bpf PATCH] bpf, selftests: test_maps generating unrecognized data section
Date: Thu, 25 Mar 2021 22:07:10 +0100 [thread overview]
Message-ID: <013bbba5-ae52-f472-02ad-8530cc8b665a@iogearbox.net> (raw)
In-Reply-To: <161662006586.29133.187705917710998342.stgit@john-Precision-5820-Tower>
On 3/24/21 10:07 PM, John Fastabend wrote:
> With a relatively recent clang master branch test_map skips a section,
>
> libbpf: elf: skipping unrecognized data section(5) .rodata.str1.1
>
> the cause is some pointless strings from bpf_printks in the BPF program
> loaded during testing. Remove them so we stop tripping our test bots.
>
> Signed-off-by: John Fastabend <john.fastabend@gmail.com>
> ---
> .../selftests/bpf/progs/sockmap_tcp_msg_prog.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c b/tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c
> index fdb4bf4408fa..0f603253f4ed 100644
> --- a/tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c
> +++ b/tools/testing/selftests/bpf/progs/sockmap_tcp_msg_prog.c
> @@ -16,10 +16,7 @@ int bpf_prog1(struct sk_msg_md *msg)
> if (data + 8 > data_end)
> return SK_DROP;
>
> - bpf_printk("data length %i\n", (__u64)msg->data_end - (__u64)msg->data);
> d = (char *)data;
Do we still need 'd' as well in that case, or the data + 8 > data_end test if we don't
read any of the data? I'm not sure what was the original purpose of the prog, perhaps
just to test that we can attach /something/ in general? Maybe in that case empty prog
is sufficient if we don't do anything useful with the rest?
> - bpf_printk("hello sendmsg hook %i %i\n", d[0], d[1]);
> -
> return SK_PASS;
> }
>
>
next prev parent reply other threads:[~2021-03-25 21:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-24 21:07 [bpf PATCH] small test_maps fix John Fastabend
2021-03-24 21:07 ` [bpf PATCH] bpf, selftests: test_maps generating unrecognized data section John Fastabend
2021-03-25 21:07 ` Daniel Borkmann [this message]
2021-03-26 0:35 ` John Fastabend
2021-03-26 3:03 ` Andrii Nakryiko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=013bbba5-ae52-f472-02ad-8530cc8b665a@iogearbox.net \
--to=daniel@iogearbox.net \
--cc=andrii@kernel.org \
--cc=ast@fb.com \
--cc=bpf@vger.kernel.org \
--cc=john.fastabend@gmail.com \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).