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From: Yonghong Song <yhs@fb.com>
To: Andrii Nakryiko <andrii@kernel.org>, <bpf@vger.kernel.org>,
	<ast@kernel.org>, <daniel@iogearbox.net>
Cc: <kernel-team@fb.com>, Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH v2 bpf-next 02/14] bpf: refactor BPF_PROG_RUN_ARRAY family of macros into functions
Date: Thu, 29 Jul 2021 10:04:45 -0700	[thread overview]
Message-ID: <75d48e52-7f3d-d657-db91-1e291b9fa493@fb.com> (raw)
In-Reply-To: <20210726161211.925206-3-andrii@kernel.org>



On 7/26/21 9:11 AM, Andrii Nakryiko wrote:
> Similar to BPF_PROG_RUN, turn BPF_PROG_RUN_ARRAY macros into proper functions
> with all the same readability and maintainability benefits. Making them into
> functions required shuffling around bpf_set_run_ctx/bpf_reset_run_ctx
> functions. Also, explicitly specifying the type of the BPF prog run callback
> required adjusting __bpf_prog_run_save_cb() to accept const void *, casted
> internally to const struct sk_buff.
> 
> Further, split out a cgroup-specific BPF_PROG_RUN_ARRAY_CG and
> BPF_PROG_RUN_ARRAY_CG_FLAGS from the more generic BPF_PROG_RUN_ARRAY due to
> the differences in bpf_run_ctx used for those two different use cases.
> 
> I think BPF_PROG_RUN_ARRAY_CG would benefit from further refactoring to accept
> struct cgroup and enum bpf_attach_type instead of bpf_prog_array, fetching
> cgrp->bpf.effective[type] and RCU-dereferencing it internally. But that
> required including include/linux/cgroup-defs.h, which I wasn't sure is ok with
> everyone.
> 
> The remaining generic BPF_PROG_RUN_ARRAY function will be extended to
> pass-through user-provided context value in the next patch.
> 
> Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

Acked-by: Yonghong Song <yhs@fb.com>

  reply	other threads:[~2021-07-29 17:05 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-26 16:11 [PATCH v2 bpf-next 00/14] BPF perf link and user-provided context value Andrii Nakryiko
2021-07-26 16:11 ` [PATCH v2 bpf-next 01/14] bpf: refactor BPF_PROG_RUN into a function Andrii Nakryiko
2021-07-29 16:49   ` Yonghong Song
2021-07-30  4:05     ` Andrii Nakryiko
2021-07-26 16:11 ` [PATCH v2 bpf-next 02/14] bpf: refactor BPF_PROG_RUN_ARRAY family of macros into functions Andrii Nakryiko
2021-07-29 17:04   ` Yonghong Song [this message]
2021-07-26 16:12 ` [PATCH v2 bpf-next 03/14] bpf: refactor perf_event_set_bpf_prog() to use struct bpf_prog input Andrii Nakryiko
2021-07-27  8:48   ` Peter Zijlstra
2021-07-29 17:09   ` Yonghong Song
2021-07-26 16:12 ` [PATCH v2 bpf-next 04/14] bpf: implement minimal BPF perf link Andrii Nakryiko
2021-07-27  9:04   ` Peter Zijlstra
2021-07-30  4:23     ` Andrii Nakryiko
2021-07-27  9:12   ` Peter Zijlstra
2021-07-27 20:56     ` Andrii Nakryiko
2021-07-27 15:40   ` Jiri Olsa
2021-07-27 20:56     ` Andrii Nakryiko
2021-07-29 17:35   ` Yonghong Song
2021-07-30  4:16     ` Andrii Nakryiko
2021-07-30  5:42       ` Yonghong Song
2021-07-26 16:12 ` [PATCH v2 bpf-next 05/14] bpf: allow to specify user-provided context value for BPF perf links Andrii Nakryiko
2021-07-27  9:11   ` Peter Zijlstra
2021-07-27 21:09     ` Andrii Nakryiko
2021-07-28  8:58       ` Peter Zijlstra
2021-07-29 18:00   ` Yonghong Song
2021-07-30  4:31     ` Andrii Nakryiko
2021-07-30  5:49       ` Yonghong Song
2021-07-30 17:48         ` Andrii Nakryiko
2021-07-30 21:34           ` Yonghong Song
2021-07-30 22:06             ` Andrii Nakryiko
2021-07-30 22:28               ` Yonghong Song
2021-07-26 16:12 ` [PATCH v2 bpf-next 06/14] bpf: add bpf_get_user_ctx() BPF helper to access user_ctx value Andrii Nakryiko
2021-07-29 18:17   ` Yonghong Song
2021-07-30  4:49     ` Andrii Nakryiko
2021-07-30  5:53       ` Yonghong Song
2021-07-26 16:12 ` [PATCH v2 bpf-next 07/14] libbpf: re-build libbpf.so when libbpf.map changes Andrii Nakryiko
2021-07-26 16:12 ` [PATCH v2 bpf-next 08/14] libbpf: remove unused bpf_link's destroy operation, but add dealloc Andrii Nakryiko
2021-07-26 16:12 ` [PATCH v2 bpf-next 09/14] libbpf: use BPF perf link when supported by kernel Andrii Nakryiko
2021-07-26 16:12 ` [PATCH v2 bpf-next 10/14] libbpf: add user_ctx support to bpf_link_create() API Andrii Nakryiko
2021-07-26 16:12 ` [PATCH v2 bpf-next 11/14] libbpf: add user_ctx to perf_event, kprobe, uprobe, and tp attach APIs Andrii Nakryiko
2021-07-30  1:11   ` Rafael David Tinoco
2021-07-26 16:12 ` [PATCH v2 bpf-next 12/14] selftests/bpf: test low-level perf BPF link API Andrii Nakryiko
2021-07-26 16:12 ` [PATCH v2 bpf-next 13/14] selftests/bpf: extract uprobe-related helpers into trace_helpers.{c,h} Andrii Nakryiko
2021-07-26 16:12 ` [PATCH v2 bpf-next 14/14] selftests/bpf: add user_ctx selftests for high-level APIs Andrii Nakryiko

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