From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B4B683537E8; Mon, 16 Mar 2026 07:55:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773647728; cv=none; b=n/8rFrv+JwcBfya2Lwi5gemCmfLHQkISypQHC7sag4wb912amjmVBzEUBGLu+f5zunwlTCivGKPEuiXUxjz8xIWZ2Ibi7Q/bFfwJooQ28G3MfPSmDRG8M0sUToCLXCs7/xse14xQazkW0NAPcw1O1niZl7DZscRex1eBJNC/4Fc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773647728; c=relaxed/simple; bh=GUJxft45e/pFp52LPbGCiUtIvL4Mvs4afmDPSzfwpJc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LyoLv1izKlEqamuAMqFftWedCwA9AuVO6XCi7FDYGGboaioPwv+dBz7ob9JfDY2JOr76hlqN6m9v3Iz+/pxG/1vQY1KB1ZoMR98j2UnzA0uN2V5ZW7tnqqh9cK4sL9O++bp+JXJ5eSGpondVYfYdzWa7RrmIIJ/7V/vx9TjnFEg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=I25+Qw2S; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="I25+Qw2S" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4A19CC19421; Mon, 16 Mar 2026 07:55:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773647728; bh=GUJxft45e/pFp52LPbGCiUtIvL4Mvs4afmDPSzfwpJc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I25+Qw2S7z3xhNjIGjGff4U523tCBdjymq35fh0pgK3Watj/trC9ypWt3baDHuIWf Vea5otvrhvUH0G2LG/Oy9fzsBfR1s2eW7tS/6PdQU6NO+nwLECSQCRc/CaHyshtGBC Wr+vHH/IFmLgIOva+uAIGquGclkYLnhUhei6dYgYLJZvtu19zCyRO/o0nMW6F63lX8 P3kdKIIRddFHyTfVk2E6v8dqwft13fUdyvqxURW5HbD2kU5457H3HDIGa2Kr4DDoQI IMAZxk6Hy7L28twz6+tHYK8MaM7EDXX2UuycOIdKr+87mUllD9K6YitKYJ2j4AI9cl 3EbC7s0cUpFZQ== From: Jiri Olsa To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: bpf@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , Menglong Dong , Steven Rostedt Subject: [PATCHv3 bpf-next 21/24] selftests/bpf: Add tracing multi session test Date: Mon, 16 Mar 2026 08:51:35 +0100 Message-ID: <20260316075138.465430-22-jolsa@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260316075138.465430-1-jolsa@kernel.org> References: <20260316075138.465430-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Adding tests for tracing multi link session. Signed-off-by: Jiri Olsa --- tools/testing/selftests/bpf/Makefile | 4 +- .../selftests/bpf/prog_tests/tracing_multi.c | 40 +++++++++++++++++ .../bpf/progs/tracing_multi_session_attach.c | 43 +++++++++++++++++++ 3 files changed, 86 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index e56e213441d8..bde0d62c147c 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -487,7 +487,8 @@ LINKED_SKELS := test_static_linked.skel.h linked_funcs.skel.h \ test_subskeleton.skel.h test_subskeleton_lib.skel.h \ test_usdt.skel.h tracing_multi.skel.h \ tracing_multi_module.skel.h \ - tracing_multi_intersect.skel.h + tracing_multi_intersect.skel.h \ + tracing_multi_session.skel.h LSKELS := fexit_sleep.c trace_printk.c trace_vprintk.c map_ptr_kern.c \ core_kern.c core_kern_overflow.c test_ringbuf.c \ @@ -516,6 +517,7 @@ xdp_features.skel.h-deps := xdp_features.bpf.o tracing_multi.skel.h-deps := tracing_multi_attach.bpf.o tracing_multi_check.bpf.o tracing_multi_module.skel.h-deps := tracing_multi_attach_module.bpf.o tracing_multi_check.bpf.o tracing_multi_intersect.skel.h-deps := tracing_multi_intersect_attach.bpf.o tracing_multi_check.bpf.o +tracing_multi_session.skel.h-deps := tracing_multi_session_attach.bpf.o tracing_multi_check.bpf.o LINKED_BPF_OBJS := $(foreach skel,$(LINKED_SKELS),$($(skel)-deps)) LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.c,$(LINKED_BPF_OBJS)) diff --git a/tools/testing/selftests/bpf/prog_tests/tracing_multi.c b/tools/testing/selftests/bpf/prog_tests/tracing_multi.c index f14a936a4667..04d83c37495b 100644 --- a/tools/testing/selftests/bpf/prog_tests/tracing_multi.c +++ b/tools/testing/selftests/bpf/prog_tests/tracing_multi.c @@ -7,6 +7,7 @@ #include "tracing_multi.skel.h" #include "tracing_multi_module.skel.h" #include "tracing_multi_intersect.skel.h" +#include "tracing_multi_session.skel.h" #include "trace_helpers.h" static __u64 bpf_fentry_test_cookies[] = { @@ -442,6 +443,43 @@ static void test_intersect(void) tracing_multi_intersect__destroy(skel); } +static void test_session(void) +{ + LIBBPF_OPTS(bpf_test_run_opts, topts); + struct tracing_multi_session *skel; + int err, prog_fd; + + skel = tracing_multi_session__open_and_load(); + if (!ASSERT_OK_PTR(skel, "tracing_multi_session__open_and_load")) + return; + + skel->bss->pid = getpid(); + + err = tracing_multi_session__attach(skel); + if (!ASSERT_OK(err, "tracing_multi_session__attach")) + goto cleanup; + + /* execute kernel session */ + prog_fd = bpf_program__fd(skel->progs.test_session_1); + err = bpf_prog_test_run_opts(prog_fd, &topts); + ASSERT_OK(err, "test_run"); + + ASSERT_EQ(skel->bss->test_result_fentry, 10, "test_result_fentry"); + /* extra count (+1 for each fexit execution) for test_result_fexit cookie */ + ASSERT_EQ(skel->bss->test_result_fexit, 20, "test_result_fexit"); + + /* execute bpf_testmo.ko session */ + ASSERT_OK(trigger_module_test_read(1), "trigger_read"); + + ASSERT_EQ(skel->bss->test_result_fentry, 15, "test_result_fentry"); + /* extra count (+1 for each fexit execution) for test_result_fexit cookie */ + ASSERT_EQ(skel->bss->test_result_fexit, 30, "test_result_fexit"); + + +cleanup: + tracing_multi_session__destroy(skel); +} + void test_tracing_multi_test(void) { #ifndef __x86_64__ @@ -465,4 +503,6 @@ void test_tracing_multi_test(void) test_intersect(); if (test__start_subtest("cookies")) test_link_api_ids(true); + if (test__start_subtest("session")) + test_session(); } diff --git a/tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c b/tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c new file mode 100644 index 000000000000..c9e005939d74 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include + +char _license[] SEC("license") = "GPL"; + +__hidden extern void tracing_multi_arg_check(__u64 *ctx, __u64 *test_result, bool is_return); + +__u64 test_result_fentry = 0; +__u64 test_result_fexit = 0; + +SEC("fsession.multi/bpf_fentry_test*") +int BPF_PROG(test_session_1) +{ + volatile __u64 *cookie = bpf_session_cookie(ctx); + + if (bpf_session_is_return(ctx)) { + tracing_multi_arg_check(ctx, &test_result_fexit, true); + /* extra count for test_result_fexit cookie */ + test_result_fexit += *cookie == 0xbeafbeafbeafbeaf; + } else { + tracing_multi_arg_check(ctx, &test_result_fentry, false); + *cookie = 0xbeafbeafbeafbeaf; + } + return 0; +} + +SEC("fsession.multi/bpf_testmod:bpf_testmod_fentry_test*") +int BPF_PROG(test_session_2) +{ + volatile __u64 *cookie = bpf_session_cookie(ctx); + + if (bpf_session_is_return(ctx)) { + tracing_multi_arg_check(ctx, &test_result_fexit, true); + /* extra count for test_result_fexit cookie */ + test_result_fexit += *cookie == 0xbeafbeafbeafbeaf; + } else { + tracing_multi_arg_check(ctx, &test_result_fentry, false); + *cookie = 0xbeafbeafbeafbeaf; + } + return 0; +} -- 2.53.0