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 X-Spam-Level: X-Spam-Status: No, score=-16.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F22F3C4646C for ; Mon, 24 Jun 2019 23:57:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CB7B020679 for ; Mon, 24 Jun 2019 23:57:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="HgR87KJO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728952AbfFXX5a (ORCPT ); Mon, 24 Jun 2019 19:57:30 -0400 Received: from mail-yb1-f202.google.com ([209.85.219.202]:34480 "EHLO mail-yb1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728926AbfFXX52 (ORCPT ); Mon, 24 Jun 2019 19:57:28 -0400 Received: by mail-yb1-f202.google.com with SMTP id v6so18236706ybs.1 for ; Mon, 24 Jun 2019 16:57:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=lTASmr8508yaqk28Yw8XQISa65o9AY9rEgUPJ2XrbLE=; b=HgR87KJOS1v7A9kmRis9ASzQhNbmeTLU0roMW42HlmJb2Vw/ecwDkpvpaNtUztTUv7 h4vpxWjgXCKKKHUKF4+wZj8DQkaAGkhJqrcWplLbvU/fI5opDKRRbdtJx3eZfJdkebxt 5lLQlThX62drcBIZH7UH+REXFuJJvNW/vtzmYPg0Ve2TeI7LUs9qg/lwHGBGOxAuhQoK YKLOIFepoVtUgSvnODVM4flMJG2zquyVTjn3+IQXbdQpZltRcrvJFjx+rDzMkYmsRIPT 0r9WqmY0/em+knUwzDG62lpnogrUEI69Q+Ivb+NXpaa2TXYGd96vpG7ghFpyM+quVfY9 vn7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=lTASmr8508yaqk28Yw8XQISa65o9AY9rEgUPJ2XrbLE=; b=A7/Hv0kEEzpyjCXaPl83gIeu0kjPApqIGsmZdqzsxnkm0+pyiNq0d9I7wnc4Qa8QT+ KRww9XyiS6Acrn4H1pHpYfxpMZhkBFbiCKl3Jz5KAMx1Ds2gY/XPf0U7fifxAJqaDehk nsg8iLLJD5E/hpztifp1eItcHRuk1Ul01//ReR/XHLoh3dXqtOknHlBlBrTAx5s61Yla a868VWswSb2KhxSahLS0fN76mpDNmtnkOvfFzu3Osl6U1kQF2t1qOYTNB4J8MF+gfCiG 7ZCDl0JxDCRZ106khOiM/XKV8rdjSEH/4m51wCAH96A6hVK9w8eQFcik3EURqJ2U4u5R X4Ug== X-Gm-Message-State: APjAAAUakOgpuv8nu95KGoinSQTXOyo8B8iTjO+9WenPIxiHPV4Wxq4m ON/EPlT5IfWLxcwRAjRj9ZixOMzXr6FKwcId X-Google-Smtp-Source: APXvYqzXalSqNauQM9XckgaKmyMAAqND1aX+nEX1lCLabHCSYvsOYf5VxY3Af5oXAhLyouFsqmetotCdMjNXR0vD X-Received: by 2002:a0d:cc91:: with SMTP id o139mr72026193ywd.162.1561420647461; Mon, 24 Jun 2019 16:57:27 -0700 (PDT) Date: Mon, 24 Jun 2019 16:57:19 -0700 In-Reply-To: <20190624235720.167067-1-allanzhang@google.com> Message-Id: <20190624235720.167067-2-allanzhang@google.com> Mime-Version: 1.0 References: <20190624235720.167067-1-allanzhang@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v3 1/2] bpf: Allow bpf_skb_event_output for a few prog types From: allanzhang To: Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , "David S. Miller" , netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org Cc: allanzhang Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Software event output is only enabled by a few prog types right now (TC, LWT out, XDP, sockops). Many other skb based prog types need bpf_skb_event_output to produce software event. Added socket_filter, cg_skb, sk_skb prog types to generate sw event. Test bpf code is generated from code snippet: struct TMP { uint64_t tmp; } tt; tt.tmp = 5; bpf_perf_event_output(skb, &connection_tracking_event_map, 0, &tt, sizeof(tt)); return 1; the bpf assembly from llvm is: 0: b7 02 00 00 05 00 00 00 r2 = 5 1: 7b 2a f8 ff 00 00 00 00 *(u64 *)(r10 - 8) = r2 2: bf a4 00 00 00 00 00 00 r4 = r10 3: 07 04 00 00 f8 ff ff ff r4 += -8 4: 18 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 r2 = 0ll 6: b7 03 00 00 00 00 00 00 r3 = 0 7: b7 05 00 00 08 00 00 00 r5 = 8 8: 85 00 00 00 19 00 00 00 call 25 9: b7 00 00 00 01 00 00 00 r0 = 1 10: 95 00 00 00 00 00 00 00 exit Signed-off-by: allanzhang --- net/core/filter.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/core/filter.c b/net/core/filter.c index 2014d76e0d2a..b75fcf412628 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5958,6 +5958,8 @@ sk_filter_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_get_socket_cookie_proto; case BPF_FUNC_get_socket_uid: return &bpf_get_socket_uid_proto; + case BPF_FUNC_perf_event_output: + return &bpf_skb_event_output_proto; default: return bpf_base_func_proto(func_id); } @@ -5978,6 +5980,8 @@ cg_skb_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_sk_storage_get_proto; case BPF_FUNC_sk_storage_delete: return &bpf_sk_storage_delete_proto; + case BPF_FUNC_perf_event_output: + return &bpf_skb_event_output_proto; #ifdef CONFIG_SOCK_CGROUP_DATA case BPF_FUNC_skb_cgroup_id: return &bpf_skb_cgroup_id_proto; @@ -6226,6 +6230,8 @@ sk_skb_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_sk_redirect_map_proto; case BPF_FUNC_sk_redirect_hash: return &bpf_sk_redirect_hash_proto; + case BPF_FUNC_perf_event_output: + return &bpf_skb_event_output_proto; #ifdef CONFIG_INET case BPF_FUNC_sk_lookup_tcp: return &bpf_sk_lookup_tcp_proto; -- 2.22.0.410.gd8fdbe21b5-goog