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=-13.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham 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 A4266C4646B for ; Tue, 25 Jun 2019 00:13:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 775462083D for ; Tue, 25 Jun 2019 00:13:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="EssshDt/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729849AbfFYANf (ORCPT ); Mon, 24 Jun 2019 20:13:35 -0400 Received: from mail-vs1-f73.google.com ([209.85.217.73]:48964 "EHLO mail-vs1-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729613AbfFYANb (ORCPT ); Mon, 24 Jun 2019 20:13:31 -0400 Received: by mail-vs1-f73.google.com with SMTP id i6so4408755vsp.15 for ; Mon, 24 Jun 2019 17:13:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=Q0hyqVzuncQMFkIZhAOHJkIfbxm5sDRWMvyBXtcavoo=; b=EssshDt/dlH+w3otVcXsWVrkwsJGAEYnRZomAA2SB8qG/Igf+gZ+Yj3LwaIyfQ+jTJ yZyJOFE5cqme7ibfp2WTeYILLR/Eq3LafVKKg36FAfr0rZ0zjaRRfvHudE5wa7UimQYV HkJr+bRcOM4asjgjGlsGVfVmMhz2WroL/8+MSe/pjIy+MSyRaLtdC1vLU7xt2FLgAbd8 f9oP8cnro7VlgAtgCGyFmly/+lk9rLMPYRrltq92XkAexvCpDl/XhrAku4YXDNJB9kcf VyY2P6cHBv0xzRRb/oyueFu/ELftH6aNCIaibDzCjQkh/Fe1azRI7GgxFS6mU08mapE+ GHPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=Q0hyqVzuncQMFkIZhAOHJkIfbxm5sDRWMvyBXtcavoo=; b=JJXxKeTNZrGmq729BF+Xp1yNIHyEJAbTVXD2rhYPBylz3r7iact/Dr3lLzeXytuQ2Y iqnXNnwcWoArHhWeGC2LE6AHheR6+oaIIaXLojzr5kL4t8W6O1+3oHxlbn38NEkZVtmk gJLJTNig254d++bzr+bHLgugh0D/J5My0MmM7q0cAXKW9C99cKLhewz1wThnCkrlgsmr Qti7SARAuA9Ay3emSOyh7ckhBnudyZy4KEbqOttc4vh4P18Ga6Crc5zzoLQfW58Is7bI YBB5AlViF+vNSbBiLPPDjDK9ZlENzSxGD1+DUqNz2w1I9qlhvKLNe4WVNQPwjXRqy3fl tJ8Q== X-Gm-Message-State: APjAAAWyQ6mDBMPiNIG1Fbk9wQoN9rA2QX+1YLzaq/MKJsl0fBKWJGO7 gShcVY0KzhpTeFwME3YEEthBtET/rpodmLAK X-Google-Smtp-Source: APXvYqymD+lJYYlyP2I7bp7SGi9HdcHDJCT5J5n7xkvzEZeLw9Txu07SMJTO5XtuZBxB44z+jN54bvP/ZD3J4c30 X-Received: by 2002:a1f:ec85:: with SMTP id k127mr12749816vkh.92.1561421610156; Mon, 24 Jun 2019 17:13:30 -0700 (PDT) Date: Mon, 24 Jun 2019 17:13:24 -0700 Message-Id: <20190625001326.172280-1-allanzhang@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH] 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 Patch 1 is enabling code. Patch 2 is fullly covered selftest code. Signed-off-by: allanzhang