From patchwork Thu Sep 10 13:09:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8rgensen?= X-Patchwork-Id: 1361577 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: incoming-bpf@patchwork.ozlabs.org Delivered-To: patchwork-incoming-bpf@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=bpf-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=aPx1hIcD; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4BnKPM6r4sz9sTd for ; Thu, 10 Sep 2020 23:24:55 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729529AbgIJNYk (ORCPT ); Thu, 10 Sep 2020 09:24:40 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:39900 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730650AbgIJNKx (ORCPT ); Thu, 10 Sep 2020 09:10:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1599743404; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VxoWDrTG5yV8ILjFLjzLOABm6GkXZ8lP0vOJBmq5UxE=; b=aPx1hIcDkXOIh2z4ok+W0oKce/mC8wajQg5SFdLEVUjgBc4tH/iamO18KTH+3Uthp9KHSr eBcCViYYxsqvfAKeuzbxU+bu+8PDosUE/eUtx+iz4HxjlzdAhmAugu2tOarNF1+GwZE6Wr hkItFJU2+vZoKhO/aFzYsT2p+XhKtjk= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-13-o2_mHB0dPsC9E2dc9ln-1g-1; Thu, 10 Sep 2020 09:10:03 -0400 X-MC-Unique: o2_mHB0dPsC9E2dc9ln-1g-1 Received: by mail-wr1-f71.google.com with SMTP id n15so2220732wrv.23 for ; Thu, 10 Sep 2020 06:10:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:date:message-id:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=VxoWDrTG5yV8ILjFLjzLOABm6GkXZ8lP0vOJBmq5UxE=; b=GMS/rP7LkREJ6yd6oQFtRLBsN6w2gQISunU0sQM9h/idInIv57Dp9kqzPEGuc169xB yHacrlXVGqmFbMMKOiyHzE7IjZ/Ejnw1/nve1mPpYr0eCDI4LnmiQcB+AIT0Ck3wLpWM mL12Qd3PzXuSGfmntOycVKkWXIM4Xagdn58xxAlfw6JNRUDmU4JkYumqMphvRekKhV5M kAJerhX5soobzWJCDmmZgD6a1qGvzWLf2NqT3lONmSqc4sUjKbnzkcqyxWU5WHdCLAN8 YltjO5kNgzihIVKjYdNiBDu24uawUI+v13Am6fyVOFEuaqbObgqZj+rej9QIjcs0rVRR tIQQ== X-Gm-Message-State: AOAM5333ocnL1HEqA+6IaS0PpJI1Mr/gz+pCvVS61/2E0X/EF6PatNch bIf2DKKm4STvOyFp+SH0z16em10C+I1HdC+cnJisyiSKFPVxB5XJJw/VnQqZR0nbkq+YJdR14p4 k0i6aT9v0Eex2 X-Received: by 2002:adf:e481:: with SMTP id i1mr8810700wrm.391.1599743401686; Thu, 10 Sep 2020 06:10:01 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyDH0rsLUEvTJsJA6cwWs9Kf3LpGyuHRCy9tgmpbTUrEU6Vc0CvgUB/7HdPrrvhEQyW+wMT4A== X-Received: by 2002:adf:e481:: with SMTP id i1mr8810644wrm.391.1599743401070; Thu, 10 Sep 2020 06:10:01 -0700 (PDT) Received: from alrua-x1.borgediget.toke.dk ([2a0c:4d80:42:443::2]) by smtp.gmail.com with ESMTPSA id t188sm3803408wmf.41.2020.09.10.06.09.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Sep 2020 06:10:00 -0700 (PDT) Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id 6C2481829D4; Thu, 10 Sep 2020 15:09:59 +0200 (CEST) Subject: [PATCH bpf-next v3 9/9] selftests/bpf: Adding test for arg dereference in extension trace From: =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8rgensen?= To: Alexei Starovoitov Cc: Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , John Fastabend , Jiri Olsa , Eelco Chaudron , KP Singh , netdev@vger.kernel.org, bpf@vger.kernel.org Date: Thu, 10 Sep 2020 15:09:59 +0200 Message-ID: <159974339934.129227.6311067668742466993.stgit@toke.dk> In-Reply-To: <159974338947.129227.5610774877906475683.stgit@toke.dk> References: <159974338947.129227.5610774877906475683.stgit@toke.dk> User-Agent: StGit/0.23 MIME-Version: 1.0 Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org From: Jiri Olsa Adding test that setup following program: SEC("classifier/test_pkt_md_access") int test_pkt_md_access(struct __sk_buff *skb) with its extension: SEC("freplace/test_pkt_md_access") int test_pkt_md_access_new(struct __sk_buff *skb) and tracing that extension with: SEC("fentry/test_pkt_md_access_new") int BPF_PROG(fentry, struct sk_buff *skb) The test verifies that the tracing program can dereference skb argument properly. Signed-off-by: Jiri Olsa --- tools/testing/selftests/bpf/prog_tests/trace_ext.c | 93 ++++++++++++++++++++ tools/testing/selftests/bpf/progs/test_trace_ext.c | 18 ++++ .../selftests/bpf/progs/test_trace_ext_tracing.c | 25 +++++ 3 files changed, 136 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/trace_ext.c create mode 100644 tools/testing/selftests/bpf/progs/test_trace_ext.c create mode 100644 tools/testing/selftests/bpf/progs/test_trace_ext_tracing.c diff --git a/tools/testing/selftests/bpf/prog_tests/trace_ext.c b/tools/testing/selftests/bpf/prog_tests/trace_ext.c new file mode 100644 index 000000000000..1089dafb4653 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/trace_ext.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0 + +#define _GNU_SOURCE +#include +#include +#include +#include +#include + +#include "test_trace_ext.skel.h" +#include "test_trace_ext_tracing.skel.h" + +static __u32 duration; + +void test_trace_ext(void) +{ + struct test_trace_ext_tracing *skel_trace = NULL; + struct test_trace_ext_tracing__bss *bss_trace; + const char *file = "./test_pkt_md_access.o"; + struct test_trace_ext *skel_ext = NULL; + struct test_trace_ext__bss *bss_ext; + int err, prog_fd, ext_fd; + struct bpf_object *obj; + char buf[100]; + __u32 retval; + __u64 len; + + err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd); + if (CHECK_FAIL(err)) + return; + + DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts, + .attach_prog_fd = prog_fd, + ); + + skel_ext = test_trace_ext__open_opts(&opts); + if (CHECK(!skel_ext, "setup", "freplace/test_pkt_md_access open failed\n")) + goto cleanup; + + err = test_trace_ext__load(skel_ext); + if (CHECK(err, "setup", "freplace/test_pkt_md_access load failed\n")) { + libbpf_strerror(err, buf, sizeof(buf)); + fprintf(stderr, "%s\n", buf); + goto cleanup; + } + + err = test_trace_ext__attach(skel_ext); + if (CHECK(err, "setup", "freplace/test_pkt_md_access attach failed: %d\n", err)) + goto cleanup; + + ext_fd = bpf_program__fd(skel_ext->progs.test_pkt_md_access_new); + + DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts_trace, + .attach_prog_fd = ext_fd, + ); + + skel_trace = test_trace_ext_tracing__open_opts(&opts_trace); + if (CHECK(!skel_trace, "setup", "tracing/test_pkt_md_access_new open failed\n")) + goto cleanup; + + err = test_trace_ext_tracing__load(skel_trace); + if (CHECK(err, "setup", "tracing/test_pkt_md_access_new load failed\n")) { + libbpf_strerror(err, buf, sizeof(buf)); + fprintf(stderr, "%s\n", buf); + goto cleanup; + } + + err = test_trace_ext_tracing__attach(skel_trace); + if (CHECK(err, "setup", "tracing/test_pkt_md_access_new attach failed: %d\n", err)) + goto cleanup; + + err = bpf_prog_test_run(prog_fd, 1, &pkt_v4, sizeof(pkt_v4), + NULL, NULL, &retval, &duration); + CHECK(err || retval, "", + "err %d errno %d retval %d duration %d\n", + err, errno, retval, duration); + + bss_ext = skel_ext->bss; + bss_trace = skel_trace->bss; + + len = bss_ext->ext_called; + + CHECK(bss_ext->ext_called == 0, + "check", "failed to trigger freplace/test_pkt_md_access\n"); + CHECK(bss_trace->fentry_called != len, + "check", "failed to trigger fentry/test_pkt_md_access_new\n"); + CHECK(bss_trace->fexit_called != len, + "check", "failed to trigger fexit/test_pkt_md_access_new\n"); + +cleanup: + test_trace_ext__destroy(skel_ext); + bpf_object__close(obj); +} diff --git a/tools/testing/selftests/bpf/progs/test_trace_ext.c b/tools/testing/selftests/bpf/progs/test_trace_ext.c new file mode 100644 index 000000000000..a6318f6b52ee --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_trace_ext.c @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2019 Facebook +#include +#include +#include +#include +#include + +volatile __u64 ext_called = 0; + +SEC("freplace/test_pkt_md_access") +int test_pkt_md_access_new(struct __sk_buff *skb) +{ + ext_called = skb->len; + return 0; +} + +char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/test_trace_ext_tracing.c b/tools/testing/selftests/bpf/progs/test_trace_ext_tracing.c new file mode 100644 index 000000000000..9e52a831446f --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_trace_ext_tracing.c @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include "vmlinux.h" +#include +#include + +volatile __u64 fentry_called = 0; + +SEC("fentry/test_pkt_md_access_new") +int BPF_PROG(fentry, struct sk_buff *skb) +{ + fentry_called = skb->len; + return 0; +} + +volatile __u64 fexit_called = 0; + +SEC("fexit/test_pkt_md_access_new") +int BPF_PROG(fexit, struct sk_buff *skb) +{ + fexit_called = skb->len; + return 0; +} + +char _license[] SEC("license") = "GPL";