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 48E334EC67C; Mon, 7 Sep 2026 13:46:15 +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=1788788781; cv=none; b=O3UXT5eAOekO/vXlJ+5lI00UdnlQIPsY2c8ziAT8pnRit9kluNhFhBy/5HAf0jvCXPXmvDF6SG04LikmsiHuVxlEXEV2S0aKMkFro3B2yBv9GLivKa8hSiJN8rtROwEeFOJJhnfR3F3U144pawMVUTOwg+RfFg9XpImdhhoWkQY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788788781; c=relaxed/simple; bh=q0nK9MTy0na0Lj9/3E6lhGsyEENN+3L5HHaMXI0bf8M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qy3HxYQ0zLlqjTMeb2uZ7Jp2erlpDFF6l1grFLF9SJQS2r+1NfuV0lwetq6D+ghMYFFULF9OfRdH2zzHTee8eJ0LGUKDbnkwK9uwyFqtIcBIiQORNb4qE+XMyKAxqEcTYZvwHAT6FdICWzRl9c74+GwgfGDRRqYDpk5SibzG9/M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=K3Dq6CWl; 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="K3Dq6CWl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E4491F00A3A; Mon, 7 Sep 2026 13:46:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788788774; bh=7p+qryQ9YGa+uAw8Z1R82l7cY5J8saHU6C966ix5ugE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=K3Dq6CWl4oyMVk03pXHMclvHpni9p3wVbi8DMN02qf15lSj/yP7nOyyTDvZZlJbQe G8m0lKQD3AAZg6dIfESbOxZNGB3Iqyny6Nethej1KiZFbXHKw2f4kloGEY2qkaq0X7 6rE3jzzxFNCf5Nre8XEcFkOWcGbuq/6Oymbixbgjvgdco0gcSwLvxe9uopdDwKpsj/ 3nxUmXnC517jQ5l8blC4BtQnhCP0G7d4+kek7AImZE542FOTxV+ZYfmsosu6PA+V1m wYSGX6CpyQsHhccfFlbHRbOKT3P7SRLi0gtTguKuUu7Frwr/JUV4tyWjY/BqfYR0N4 /if46peMA+iIw== From: Puranjay Mohan To: bpf@vger.kernel.org, rcu@vger.kernel.org Cc: Puranjay Mohan , "Alexei Starovoitov" , "Daniel Borkmann" , "Andrii Nakryiko" , "Martin KaFai Lau" , "Eduard Zingerman" , "Kumar Kartikeya Dwivedi" , "Song Liu" , "Yonghong Song" , "Harry Yoo (Oracle)" , "Paul E. McKenney" Subject: [PATCH bpf-next 4/4] selftests/bpf: Add a test for bpf_call_rcu_tasks_trace() Date: Mon, 7 Sep 2026 06:45:51 -0700 Message-ID: <20260907134552.1772405-5-puranjay@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260907134552.1772405-1-puranjay@kernel.org> References: <20260907134552.1772405-1-puranjay@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Run the same functional test against the tasks trace flavour. Signed-off-by: Puranjay Mohan --- .../testing/selftests/bpf/prog_tests/call_rcu.c | 12 ++++++++---- tools/testing/selftests/bpf/progs/call_rcu.c | 17 +++++++++++++++++ 2 files changed, 25 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/call_rcu.c b/tools/testing/selftests/bpf/prog_tests/call_rcu.c index ccbfa9965d511..56f0ea3e5a0fe 100644 --- a/tools/testing/selftests/bpf/prog_tests/call_rcu.c +++ b/tools/testing/selftests/bpf/prog_tests/call_rcu.c @@ -24,9 +24,10 @@ static bool wait_for_callbacks(struct call_rcu *skel, int expected) return false; } -static void test_call_rcu_run(void) +static void test_call_rcu_run(bool trace) { LIBBPF_OPTS(bpf_test_run_opts, opts); + struct bpf_program *prog; struct call_rcu *skel; struct elem elem; __u32 key = 1; @@ -36,7 +37,8 @@ static void test_call_rcu_run(void) if (!ASSERT_OK_PTR(skel, "skel_open_and_load")) return; - err = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.arm), &opts); + prog = trace ? skel->progs.arm_trace : skel->progs.arm; + err = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts); if (!ASSERT_OK(err, "test_run") || !ASSERT_EQ(opts.retval, 0, "retval")) goto out; @@ -55,7 +57,7 @@ static void test_call_rcu_run(void) ASSERT_EQ(elem.val, 0, "value_cleared"); /* The head is disarmed before the callback runs, so it can be reused. */ - err = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.arm), &opts); + err = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts); if (!ASSERT_OK(err, "test_run_again")) goto out; ASSERT_EQ(skel->bss->arm_err, 0, "rearm_err"); @@ -172,7 +174,9 @@ static void test_call_rcu_inner_map(void) void test_call_rcu(void) { if (test__start_subtest("run")) - test_call_rcu_run(); + test_call_rcu_run(false); + if (test__start_subtest("run_tasks_trace")) + test_call_rcu_run(true); if (test__start_subtest("chain")) test_call_rcu_chain(); if (test__start_subtest("teardown")) diff --git a/tools/testing/selftests/bpf/progs/call_rcu.c b/tools/testing/selftests/bpf/progs/call_rcu.c index 50349b104d1a6..8f5884f26ccd4 100644 --- a/tools/testing/selftests/bpf/progs/call_rcu.c +++ b/tools/testing/selftests/bpf/progs/call_rcu.c @@ -65,6 +65,23 @@ int arm(void *ctx) return 0; } +SEC("syscall") +int arm_trace(void *ctx) +{ + __u32 key = 1; + struct elem *e; + + e = bpf_map_lookup_elem(&arr, &key); + if (!e) + return 1; + + e->val = 0xdeadbeef; + /* No lock needed: the enclosing rcu_read_lock_trace() already blocks the grace period. */ + arm_err = bpf_call_rcu_tasks_trace(&e->rh, &arr, reclaim); + busy_err = bpf_call_rcu_tasks_trace(&e->rh, &arr, reclaim); + return 0; +} + SEC("iter/bpf_map_elem") int dump(struct bpf_iter__bpf_map_elem *ctx) { -- 2.53.0-Meta