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From: Kenny Ho <y2kenny@gmail.com>
To: Martin KaFai Lau <kafai@fb.com>, bpf <bpf@vger.kernel.org>
Subject: Headers for whitelisted kernel functions available to BPF programs
Date: Thu, 3 Jun 2021 14:01:13 -0400	[thread overview]
Message-ID: <CAOWid-drUQKifjPgzQ3MQiKUUrHp5eKOydgSToadW1fNkUME7g@mail.gmail.com> (raw)

Hi,

I understand that helper functions available to bpf programs are
listed in include/uapi/linux/bpf.h and kernel headers can be made
available at /sys/kernel/kheaders.tar.xz with CONFIG_IKHEADERS.  But
with the support of calling kernel functions from bpf programs, how
would one know which functions are whitelisted?  Are the headers for
these whitelisted functions available via something like "bpftool btf
dump file /sys/kernel/btf/vmlinux format c"?

Regards,
Kenny

             reply	other threads:[~2021-06-03 18:02 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-03 18:01 Kenny Ho [this message]
2021-06-04  6:13 ` Headers for whitelisted kernel functions available to BPF programs Martin KaFai Lau
2021-06-04 16:10   ` Yonghong Song
2021-06-04 20:47     ` Kenny Ho
2021-06-08 19:51       ` Kenny Ho
2021-06-09  6:41         ` Yonghong Song
2021-06-15 19:34           ` Kenny Ho
2021-06-16 16:28             ` Yonghong Song

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