From: Eduard Zingerman <eddyz87@gmail.com>
To: Martin KaFai Lau <martin.lau@linux.dev>, bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Yonghong Song <yonghong.song@linux.dev>,
Amery Hung <ameryhung@gmail.com>,
kernel-team@meta.com
Subject: Re: [PATCH v4 bpf-next 1/9] bpf: Move insn_buf[16] to bpf_verifier_env
Date: Wed, 28 Aug 2024 17:41:28 -0700 [thread overview]
Message-ID: <9bcfc97f011f4b4d5dc312e26074d0c1d744af02.camel@gmail.com> (raw)
In-Reply-To: <20240827194834.1423815-2-martin.lau@linux.dev>
On Tue, 2024-08-27 at 12:48 -0700, Martin KaFai Lau wrote:
> From: Martin KaFai Lau <martin.lau@kernel.org>
>
> This patch moves the 'struct bpf_insn insn_buf[16]' stack usage
> to the bpf_verifier_env. A '#define INSN_BUF_SIZE 16' is also added
> to replace the ARRAY_SIZE(insn_buf) usages.
>
> Both convert_ctx_accesses() and do_misc_fixup() are changed
> to use the env->insn_buf.
>
> It is a prep work for adding the epilogue_buf[16] in a later patch.
>
> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
> ---
Not sure if this refactoring is worth it but code looks correct.
Note that there is also inline_bpf_loop()
(it needs a slightly bigger buffer).
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
[...]
next prev parent reply other threads:[~2024-08-29 0:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-27 19:48 [PATCH v4 bpf-next 0/9] bpf: Add gen_epilogue to bpf_verifier_ops Martin KaFai Lau
2024-08-27 19:48 ` [PATCH v4 bpf-next 1/9] bpf: Move insn_buf[16] to bpf_verifier_env Martin KaFai Lau
2024-08-29 0:41 ` Eduard Zingerman [this message]
2024-08-29 1:46 ` Alexei Starovoitov
2024-08-29 15:20 ` Martin KaFai Lau
2024-08-29 15:26 ` Alexei Starovoitov
2024-08-29 15:33 ` Martin KaFai Lau
2024-08-27 19:48 ` [PATCH v4 bpf-next 3/9] bpf: Add gen_epilogue to bpf_verifier_ops Martin KaFai Lau
2024-08-29 2:26 ` Eduard Zingerman
2024-08-29 15:47 ` Martin KaFai Lau
2024-08-27 19:48 ` [PATCH v4 bpf-next 4/9] bpf: Export bpf_base_func_proto Martin KaFai Lau
2024-08-27 19:48 ` [PATCH v4 bpf-next 5/9] selftests/bpf: attach struct_ops maps before test prog runs Martin KaFai Lau
2024-08-27 19:48 ` [PATCH v4 bpf-next 6/9] selftests/bpf: Test gen_prologue and gen_epilogue Martin KaFai Lau
2024-08-29 7:27 ` Eduard Zingerman
2024-08-29 17:35 ` Martin KaFai Lau
2024-08-27 19:48 ` [PATCH v4 bpf-next 7/9] selftests/bpf: Add tailcall epilogue test Martin KaFai Lau
2024-08-29 6:16 ` Eduard Zingerman
2024-08-29 18:15 ` Martin KaFai Lau
2024-08-27 19:48 ` [PATCH v4 bpf-next 8/9] selftests/bpf: A pro/epilogue test when the main prog jumps back to the 1st insn Martin KaFai Lau
2024-08-29 6:21 ` Eduard Zingerman
2024-08-27 19:48 ` [PATCH v4 bpf-next 9/9] selftests/bpf: Test epilogue patching when the main prog has multiple BPF_EXIT Martin KaFai Lau
2024-08-28 0:58 ` Martin KaFai Lau
2024-08-29 6:28 ` Eduard Zingerman
2024-08-29 20:09 ` Martin KaFai Lau
2024-08-29 6:25 ` Eduard Zingerman
2024-08-27 19:52 ` [PATCH v4 bpf-next 2/9] bpf: Adjust BPF_JMP that jumps to the 1st insn of the prologue Martin KaFai Lau
2024-08-28 16:48 ` Alexei Starovoitov
2024-08-28 17:44 ` Martin KaFai Lau
2024-08-28 18:43 ` Alexei Starovoitov
2024-08-28 18:59 ` Martin KaFai Lau
[not found] ` <20240827194834.1423815-3-martin.lau@linux.dev>
2024-08-29 2:01 ` Eduard Zingerman
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