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[2001:1ae9:1c2:4c00:726e:c10f:8833:ff22]) by smtp.gmail.com with ESMTPSA id h11-20020aa7c94b000000b00558a3268bbcsm5651569edt.53.2024.01.31.01.47.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 31 Jan 2024 01:47:48 -0800 (PST) From: Jiri Olsa X-Google-Original-From: Jiri Olsa Date: Wed, 31 Jan 2024 10:47:46 +0100 To: Daniel Xu Cc: linux-trace-kernel@vger.kernel.org, coreteam@netfilter.org, bpf@vger.kernel.org, linux-input@vger.kernel.org, cgroups@vger.kernel.org, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, fsverity@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, netfilter-devel@vger.kernel.org, alexei.starovoitov@gmail.com, olsajiri@gmail.com, quentin@isovalent.com, alan.maguire@oracle.com, memxor@gmail.com Subject: Re: [PATCH bpf-next v4 0/3] Annotate kfuncs in .BTF_ids section Message-ID: References: Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Sun, Jan 28, 2024 at 06:24:05PM -0700, Daniel Xu wrote: > === Description === > > This is a bpf-treewide change that annotates all kfuncs as such inside > .BTF_ids. This annotation eventually allows us to automatically generate > kfunc prototypes from bpftool. > > We store this metadata inside a yet-unused flags field inside struct > btf_id_set8 (thanks Kumar!). pahole will be taught where to look. > > More details about the full chain of events are available in commit 3's > description. > > The accompanying pahole and bpftool changes can be viewed > here on these "frozen" branches [0][1]. > > [0]: https://github.com/danobi/pahole/tree/kfunc_btf-v3-mailed > [1]: https://github.com/danobi/linux/tree/kfunc_bpftool-mailed > > === Changelog === > > Changes from v3: > * Rebase to bpf-next and add missing annotation on new kfunc Acked-by: Jiri Olsa jirka > > Changes from v2: > * Only WARN() for vmlinux kfuncs > > Changes from v1: > * Move WARN_ON() up a call level > * Also return error when kfunc set is not properly tagged > * Use BTF_KFUNCS_START/END instead of flags > * Rename BTF_SET8_KFUNC to BTF_SET8_KFUNCS > > Daniel Xu (3): > bpf: btf: Support flags for BTF_SET8 sets > bpf: btf: Add BTF_KFUNCS_START/END macro pair > bpf: treewide: Annotate BPF kfuncs in BTF > > Documentation/bpf/kfuncs.rst | 8 +++---- > drivers/hid/bpf/hid_bpf_dispatch.c | 8 +++---- > fs/verity/measure.c | 4 ++-- > include/linux/btf_ids.h | 21 +++++++++++++++---- > kernel/bpf/btf.c | 8 +++++++ > kernel/bpf/cpumask.c | 4 ++-- > kernel/bpf/helpers.c | 8 +++---- > kernel/bpf/map_iter.c | 4 ++-- > kernel/cgroup/rstat.c | 4 ++-- > kernel/trace/bpf_trace.c | 8 +++---- > net/bpf/test_run.c | 8 +++---- > net/core/filter.c | 20 +++++++++--------- > net/core/xdp.c | 4 ++-- > net/ipv4/bpf_tcp_ca.c | 4 ++-- > net/ipv4/fou_bpf.c | 4 ++-- > net/ipv4/tcp_bbr.c | 4 ++-- > net/ipv4/tcp_cubic.c | 4 ++-- > net/ipv4/tcp_dctcp.c | 4 ++-- > net/netfilter/nf_conntrack_bpf.c | 4 ++-- > net/netfilter/nf_nat_bpf.c | 4 ++-- > net/xfrm/xfrm_interface_bpf.c | 4 ++-- > net/xfrm/xfrm_state_bpf.c | 4 ++-- > .../selftests/bpf/bpf_testmod/bpf_testmod.c | 8 +++---- > 23 files changed, 87 insertions(+), 66 deletions(-) > > -- > 2.42.1 > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A4056C47DB3 for ; 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[2001:1ae9:1c2:4c00:726e:c10f:8833:ff22]) by smtp.gmail.com with ESMTPSA id h11-20020aa7c94b000000b00558a3268bbcsm5651569edt.53.2024.01.31.01.47.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 31 Jan 2024 01:47:48 -0800 (PST) From: Jiri Olsa X-Google-Original-From: Jiri Olsa Date: Wed, 31 Jan 2024 10:47:46 +0100 To: Daniel Xu Cc: linux-trace-kernel@vger.kernel.org, coreteam@netfilter.org, bpf@vger.kernel.org, linux-input@vger.kernel.org, cgroups@vger.kernel.org, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, fsverity@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, netfilter-devel@vger.kernel.org, alexei.starovoitov@gmail.com, olsajiri@gmail.com, quentin@isovalent.com, alan.maguire@oracle.com, memxor@gmail.com Subject: Re: [PATCH bpf-next v4 0/3] Annotate kfuncs in .BTF_ids section Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240131_094757_691558_714D5613 X-CRM114-Status: GOOD ( 17.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Jan 28, 2024 at 06:24:05PM -0700, Daniel Xu wrote: > === Description === > > This is a bpf-treewide change that annotates all kfuncs as such inside > .BTF_ids. This annotation eventually allows us to automatically generate > kfunc prototypes from bpftool. > > We store this metadata inside a yet-unused flags field inside struct > btf_id_set8 (thanks Kumar!). pahole will be taught where to look. > > More details about the full chain of events are available in commit 3's > description. > > The accompanying pahole and bpftool changes can be viewed > here on these "frozen" branches [0][1]. > > [0]: https://github.com/danobi/pahole/tree/kfunc_btf-v3-mailed > [1]: https://github.com/danobi/linux/tree/kfunc_bpftool-mailed > > === Changelog === > > Changes from v3: > * Rebase to bpf-next and add missing annotation on new kfunc Acked-by: Jiri Olsa jirka > > Changes from v2: > * Only WARN() for vmlinux kfuncs > > Changes from v1: > * Move WARN_ON() up a call level > * Also return error when kfunc set is not properly tagged > * Use BTF_KFUNCS_START/END instead of flags > * Rename BTF_SET8_KFUNC to BTF_SET8_KFUNCS > > Daniel Xu (3): > bpf: btf: Support flags for BTF_SET8 sets > bpf: btf: Add BTF_KFUNCS_START/END macro pair > bpf: treewide: Annotate BPF kfuncs in BTF > > Documentation/bpf/kfuncs.rst | 8 +++---- > drivers/hid/bpf/hid_bpf_dispatch.c | 8 +++---- > fs/verity/measure.c | 4 ++-- > include/linux/btf_ids.h | 21 +++++++++++++++---- > kernel/bpf/btf.c | 8 +++++++ > kernel/bpf/cpumask.c | 4 ++-- > kernel/bpf/helpers.c | 8 +++---- > kernel/bpf/map_iter.c | 4 ++-- > kernel/cgroup/rstat.c | 4 ++-- > kernel/trace/bpf_trace.c | 8 +++---- > net/bpf/test_run.c | 8 +++---- > net/core/filter.c | 20 +++++++++--------- > net/core/xdp.c | 4 ++-- > net/ipv4/bpf_tcp_ca.c | 4 ++-- > net/ipv4/fou_bpf.c | 4 ++-- > net/ipv4/tcp_bbr.c | 4 ++-- > net/ipv4/tcp_cubic.c | 4 ++-- > net/ipv4/tcp_dctcp.c | 4 ++-- > net/netfilter/nf_conntrack_bpf.c | 4 ++-- > net/netfilter/nf_nat_bpf.c | 4 ++-- > net/xfrm/xfrm_interface_bpf.c | 4 ++-- > net/xfrm/xfrm_state_bpf.c | 4 ++-- > .../selftests/bpf/bpf_testmod/bpf_testmod.c | 8 +++---- > 23 files changed, 87 insertions(+), 66 deletions(-) > > -- > 2.42.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel