From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 7CBE93557F3; Wed, 27 May 2026 11:44:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779882261; cv=none; b=Xd33wqMrmmcVwzdnrBUIykYt1jiTRa4nKEA6JA/r0Jbq0zZ+XmuHAAQnxwb7Mlm1/MHzfjPyUAoIgqn2Tkoddbfr08bXv95C9NZBJTCKLB2xTolH1S9D5HhRerZ7okipzdN43YKxrHOZfGnXCg2jTUSeDiADhWzORJuIvlEQsH4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779882261; c=relaxed/simple; bh=3UO4jn27A3mevzQ3+8L6rNz8codnyOglySvMe11uYxg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kAZ5B+d0/XJEb/F1NIZZc51oZhjYo0EuXhg4UZAFlURoi41a/bBBj4q5U62KlClt5H4cBrp7DJ6RRqLkO09pplLAGAydlNEPVQZBzJ9uX3gLjrIJ6zPUfsbqjN0IkOhjh1QXenHkPQ6wuLv7oNwg5d+hVT9tNhKk0U+Uax90NPE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AwGGRPTm; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AwGGRPTm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C7C31F00A3A; Wed, 27 May 2026 11:44:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779882259; bh=SnVfxmEA9AR/aqzVezlLFL7L7mQEsvVEAo2jy3FqvMk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=AwGGRPTmkNPqHCBYWXxraFT+u31PWmQekk/qPH8RFPB3wuyzEzXrRdDcNIp2XuByI 5NmQKd4I1Z3DjCqk5ragYk7NsqTuJOHoQtmg7Bn95ejrEJhES7QVa1S7GENY89zVm+ EGyCHpYY4a+lTOBfZncbH0IdvRPsdGISY5xbKVeiLLWjsX6q31q/I7Tx2Gd519VI+M ARPXfoqPWG3EV4bFKEZ9GSYsOCQ2k6+2l2K0YOWZTG/sCksE2aWbNuyRmXu7vGQu0c iR0iUOncZh96S+Ynli7BatmXZ3D2upFHkZ9yyQoAFKsUM2ZCmyURFemLkTuOkhIL+X l0ZNhRhSk9qpQ== 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: [PATCHv6 bpf-next 25/29] selftests/bpf: Add tracing multi session test Date: Wed, 27 May 2026 13:39:47 +0200 Message-ID: <20260527113951.46265-26-jolsa@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260527113951.46265-1-jolsa@kernel.org> References: <20260527113951.46265-1-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 | 47 +++++++++++++++++++ 3 files changed, 90 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 95b87cba46bc..30ad24bb7054 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -502,7 +502,8 @@ 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 \ @@ -531,6 +532,7 @@ 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 f27c086d3f78..202005f2dbeb 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[] = { @@ -454,6 +455,43 @@ 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__ @@ -477,4 +515,6 @@ 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..4dc9bce96097 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c @@ -0,0 +1,47 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include + +char _license[] SEC("license") = "GPL"; + +__hidden extern int 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)) { + if (tracing_multi_arg_check(ctx, &test_result_fexit, true)) + return 0; + /* extra count for test_result_fexit cookie */ + test_result_fexit += *cookie == 0xbeafbeafbeafbeaf; + } else { + if (tracing_multi_arg_check(ctx, &test_result_fentry, false)) + return 0; + *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)) { + if (tracing_multi_arg_check(ctx, &test_result_fexit, true)) + return 0; + /* extra count for test_result_fexit cookie */ + test_result_fexit += *cookie == 0xbeafbeafbeafbeaf; + } else { + if (tracing_multi_arg_check(ctx, &test_result_fentry, false)) + return 0; + *cookie = 0xbeafbeafbeafbeaf; + } + return 0; +} -- 2.54.0