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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Simon Horman , Andrii Nakryiko , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , kernel-team Subject: Re: [PATCH bpf-next v2 15/16] bpf: Realign skb metadata for TC progs using data_meta In-Reply-To: (Amery Hung's message of "Tue, 6 Jan 2026 09:46:49 -0800") References: <20260105-skb-meta-safeproof-netdevs-rx-only-v2-0-a21e679b5afa@cloudflare.com> <20260105-skb-meta-safeproof-netdevs-rx-only-v2-15-a21e679b5afa@cloudflare.com> <877btu8wz2.fsf@cloudflare.com> Date: Tue, 06 Jan 2026 20:12:56 +0100 Message-ID: <87qzs2imh3.fsf@cloudflare.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On Tue, Jan 06, 2026 at 09:46 AM -08, Amery Hung wrote: > On Tue, Jan 6, 2026 at 9:36=E2=80=AFAM Jakub Sitnicki wrote: >> --- a/kernel/bpf/verifier.c >> +++ b/kernel/bpf/verifier.c >> @@ -21806,6 +21806,14 @@ static int convert_ctx_accesses(struct bpf_veri= fier_env *env) >> env->prog =3D new_prog; >> delta +=3D cnt - 1; >> >> + /* gen_prologue emits function calls with target= address >> + * relative to __bpf_call_base. Skip patch_call_= imm fixup. >> + */ >> + for (i =3D 0; i < cnt - 1; i++) { >> + if (bpf_helper_call(&env->prog->insnsi[i= ])) >> + env->insn_aux_data[i].finalized_= call =3D true; >> + } >> + >> ret =3D add_kfunc_in_insns(env, insn_buf, cnt - = 1); > > And then we can get rid of this function as there is no use case for > having a new kfunc in gen_{pro,epi}logue. Happy to convert bpf_{qdisc,testmod} gen_{pro,epi}logue to use BPF_EMIT_CALL instead of BPF_CALL_KFUNC. If it's alright with you, I'd like to kill kfunc support in {pro,epi}logue as a follow up. Looks like there will be a bit of churn in selftests to remove the coverage. And this series is getting quite long.