From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f195.google.com (mail-pl1-f195.google.com [209.85.214.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0E681345722 for ; Wed, 24 Dec 2025 13:09:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.195 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766581782; cv=none; b=s2Ppbw8asBnIjvOlgZfABxyBrGwLG33/Hiwy/Uzb8z39/urdFE7yK7HwybTc8PcvZogweMh48wjCsAemJPhKnSbCobN+43liED1grNHTMmJuy7uu82yFsUdx9hhxLgYU3/0oR9oX0wySSqOi7RtdyphOjuAMRaQBNKFA78XTTso= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766581782; c=relaxed/simple; bh=Bmazx6R7HTgrZAAci2Hgxnnq07VZy40dkV/5oC73DrI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DAXoUaIn2Yjl8k7/Ur8hsqHVE4bQ1QYg6cV3RWnJHV4eqF5+1/2UkprskB37x+uLXHoqyNw51wxNKyke9t162xgowxqJOP/St0UKxkSomt3IzjkXnjsWoAcVGEAY+i0H73VbadAWBlYlefLS45ZXy4/cFcdSZksKMP/WYT4L7yA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=EvW/FKtc; arc=none smtp.client-ip=209.85.214.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="EvW/FKtc" Received: by mail-pl1-f195.google.com with SMTP id d9443c01a7336-2a09a3bd9c5so52546615ad.3 for ; Wed, 24 Dec 2025 05:09:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1766581780; x=1767186580; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=P/XzCDYEI0ITxaGC+HfLOBIfCYLkIH8T7xQ7CvHDcOk=; b=EvW/FKtcSDvLvFDsSsdODm5X0k7pjEPthbe2DOYZartxQGRh5gZnEma0WeOxWvr9W6 nQhNKK9Pcb2t4mQ2VEeEmAPFuKpz+rDIu8aEp1uyiicmUlZ3vwsskuLBKX3JQCQ/NySD 9qq9+XQGQZsNlYwTtXUFjTare+XN/L6m6PgU4o1mjip7Zli84XXKPj5AJ5Mhh9m21vSU n0RXTRoxijPws+rsVSCWK3aZet3siDS2JKbwIYOj8uphJUmvUbY9DljRiKobgPap64dZ gcanwLlEisEHvAWY4HalLWTS9jPtQhBAUYg1U4QzNaZECqhTCtcrHbWko19a86gJ4eLu 3C9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1766581780; x=1767186580; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=P/XzCDYEI0ITxaGC+HfLOBIfCYLkIH8T7xQ7CvHDcOk=; b=UvvV5rfhIzUrsaK2o2ifExCpSoYWMWkkqOQzcGZ7FXSw5xtbfEQOR4Vk8WDBkEQa3U 6Pn1HQ1IQUW6z0nQkSPIHF2AbdnHJozA5E++e5xBkUGn8pHfV3p1c3BLWuNIygYaVsrh XVc2aKd+q9oa7gL0/2d9JRB6j+16+7a0dSlHd4gBA9QrSQ0L5o+YmlEXAEbKN9I3J2s4 0Fw6oBi+t/D8re49FT3r8NfvpzqAFRGHYQNOB2RLjeR3BJBYDIW+L8SmbPUNZz3ThnvW bZw6jdLEMogSrXZuL6n9CtQCPWP1BNW3oDrq3/ZDwkahTGNFWp1M1BEA4VdVVnuS/3eP bnYw== X-Forwarded-Encrypted: i=1; AJvYcCUKcpD5iFx8/Mcl9pjWywxSKe/FtaUrQLlQ3aqe7yF0/SpDaobDjE47S8muJHVR94kCsfw=@vger.kernel.org X-Gm-Message-State: AOJu0YxnvHnTHn5/AVt2jJuXbj6aMsUJKVobSZ/IxZ3vPEply51fp4H9 cCBZJz5ESgS4JBQbiffZYqJFn/22SSDkN15WFTUp1+Om2F0Z2FiUd7n/ X-Gm-Gg: AY/fxX71om2ENryw8tWYZYuvbQVIKBYmbFUg9itSdBu0s1muAF93taGr/EKPLNbjE+/ s2fKLUMXBCTONK7UY6ixPZTNnbOP2F0ZwNHuzff3LdF7/H7uU4e3xg8WR2EBHxOcAIA/ofY4/vk b8OZa90p3z+ysSMJeoUGUYAPRpoYeRi1Evyyo3idf/QpIZxG8eqtvS6p+A27wHcNz2X0WkpH9Eh cTSL8iUZW5LdbQZ8Jb3/ltV81lK/3F3RNCsP3JQTFDxzLnSsOEVjqo7VHNnuzEDW+wmYSp5yOtT Jx7awlhFsPaC4hjjFb5u6qcVEClBcWtYJBSKIicZzh7FQ1dFpMOnRdgGYG8z80JQx/V4pPlrdOW PtjLmvSlQVXVNJXzVMVsdhOU0DoRVKyERgLLsWtT5pN/1wubajr64SOv6lmQ8OGx7NNpysJbIq4 B+dPHJKnWcjYAAucwl4Q== X-Google-Smtp-Source: AGHT+IGf1imjHRE+ghCg/KJNQShasOaQNtbDozqmyux9+RUBrJ9Pqo/VwgFHn/aR49SnKMnCqVtx3g== X-Received: by 2002:a17:903:4b28:b0:2a0:ed13:398e with SMTP id d9443c01a7336-2a2f2a4f222mr181527185ad.49.1766581780271; Wed, 24 Dec 2025 05:09:40 -0800 (PST) Received: from 7950hx ([160.187.0.149]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7ff7dfac28fsm16841173b3a.32.2025.12.24.05.09.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Dec 2025 05:09:39 -0800 (PST) From: Menglong Dong X-Google-Original-From: Menglong Dong To: ast@kernel.org, andrii@kernel.org Cc: daniel@iogearbox.net, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, davem@davemloft.net, dsahern@kernel.org, tglx@linutronix.de, mingo@redhat.com, jiang.biao@linux.dev, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next v5 08/10] selftests/bpf: add testcases for fsession Date: Wed, 24 Dec 2025 21:07:33 +0800 Message-ID: <20251224130735.201422-9-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251224130735.201422-1-dongml2@chinatelecom.cn> References: <20251224130735.201422-1-dongml2@chinatelecom.cn> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add testcases for BPF_TRACE_FSESSION. The function arguments and return value are tested both in the entry and exit. And the kfunc bpf_fsession_is_ret() is also tested. As the layout of the stack changed for fsession, so we also test bpf_get_func_ip() for it. Signed-off-by: Menglong Dong --- v3: - restructure the testcase by combine the testcases for session cookie and get_func_ip into one patch --- .../selftests/bpf/prog_tests/fsession_test.c | 90 ++++++++++++++ .../selftests/bpf/progs/fsession_test.c | 110 ++++++++++++++++++ 2 files changed, 200 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/fsession_test.c create mode 100644 tools/testing/selftests/bpf/progs/fsession_test.c diff --git a/tools/testing/selftests/bpf/prog_tests/fsession_test.c b/tools/testing/selftests/bpf/prog_tests/fsession_test.c new file mode 100644 index 000000000000..83f3953a1ff6 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/fsession_test.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2025 ChinaTelecom */ +#include +#include "fsession_test.skel.h" + +static int check_result(struct fsession_test *skel) +{ + LIBBPF_OPTS(bpf_test_run_opts, topts); + int err, prog_fd; + + /* Trigger test function calls */ + prog_fd = bpf_program__fd(skel->progs.test1); + err = bpf_prog_test_run_opts(prog_fd, &topts); + if (!ASSERT_OK(err, "test_run_opts err")) + return err; + if (!ASSERT_OK(topts.retval, "test_run_opts retval")) + return topts.retval; + + for (int i = 0; i < sizeof(*skel->bss) / sizeof(__u64); i++) { + if (!ASSERT_EQ(((__u64 *)skel->bss)[i], 1, "test_result")) + return -EINVAL; + } + + return 0; +} + +static void test_fsession_basic(void) +{ + struct fsession_test *skel = NULL; + int err; + + skel = fsession_test__open_and_load(); + if (!ASSERT_OK_PTR(skel, "fsession_test__open_and_load")) + goto cleanup; + + err = fsession_test__attach(skel); + if (!ASSERT_OK(err, "fsession_attach")) + goto cleanup; + + check_result(skel); +cleanup: + fsession_test__destroy(skel); +} + +static void test_fsession_reattach(void) +{ + struct fsession_test *skel = NULL; + int err; + + skel = fsession_test__open_and_load(); + if (!ASSERT_OK_PTR(skel, "fsession_test__open_and_load")) + goto cleanup; + + /* First attach */ + err = fsession_test__attach(skel); + if (!ASSERT_OK(err, "fsession_first_attach")) + goto cleanup; + + if (check_result(skel)) + goto cleanup; + + /* Detach */ + fsession_test__detach(skel); + + /* Reset counters */ + memset(skel->bss, 0, sizeof(*skel->bss)); + + /* Second attach */ + err = fsession_test__attach(skel); + if (!ASSERT_OK(err, "fsession_second_attach")) + goto cleanup; + + if (check_result(skel)) + goto cleanup; + +cleanup: + fsession_test__destroy(skel); +} + +void test_fsession_test(void) +{ +#if !defined(__x86_64__) + test__skip(); + return; +#endif + if (test__start_subtest("fsession_basic")) + test_fsession_basic(); + if (test__start_subtest("fsession_reattach")) + test_fsession_reattach(); +} diff --git a/tools/testing/selftests/bpf/progs/fsession_test.c b/tools/testing/selftests/bpf/progs/fsession_test.c new file mode 100644 index 000000000000..b180e339c17f --- /dev/null +++ b/tools/testing/selftests/bpf/progs/fsession_test.c @@ -0,0 +1,110 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2025 ChinaTelecom */ +#include +#include +#include + +char _license[] SEC("license") = "GPL"; + +__u64 test1_entry_result = 0; +__u64 test1_exit_result = 0; + +SEC("fsession/bpf_fentry_test1") +int BPF_PROG(test1, int a, int ret) +{ + bool is_exit = bpf_fsession_is_return(ctx); + + if (!is_exit) { + test1_entry_result = a == 1 && ret == 0; + return 0; + } + + test1_exit_result = a == 1 && ret == 2; + return 0; +} + +__u64 test2_entry_result = 0; +__u64 test2_exit_result = 0; + +SEC("fsession/bpf_fentry_test3") +int BPF_PROG(test2, char a, int b, __u64 c, int ret) +{ + bool is_exit = bpf_fsession_is_return(ctx); + + if (!is_exit) { + test2_entry_result = a == 4 && b == 5 && c == 6 && ret == 0; + return 0; + } + + test2_exit_result = a == 4 && b == 5 && c == 6 && ret == 15; + return 0; +} + +__u64 test3_entry_result = 0; +__u64 test3_exit_result = 0; + +SEC("fsession/bpf_fentry_test4") +int BPF_PROG(test3, void *a, char b, int c, __u64 d, int ret) +{ + bool is_exit = bpf_fsession_is_return(ctx); + + if (!is_exit) { + test3_entry_result = a == (void *)7 && b == 8 && c == 9 && d == 10 && ret == 0; + return 0; + } + + test3_exit_result = a == (void *)7 && b == 8 && c == 9 && d == 10 && ret == 34; + return 0; +} + +__u64 test4_entry_result = 0; +__u64 test4_exit_result = 0; + +SEC("fsession/bpf_fentry_test5") +int BPF_PROG(test4, __u64 a, void *b, short c, int d, __u64 e, int ret) +{ + bool is_exit = bpf_fsession_is_return(ctx); + + if (!is_exit) { + test4_entry_result = a == 11 && b == (void *)12 && c == 13 && d == 14 && + e == 15 && ret == 0; + return 0; + } + + test4_exit_result = a == 11 && b == (void *)12 && c == 13 && d == 14 && + e == 15 && ret == 65; + return 0; +} + +__u64 test5_entry_result = 0; +__u64 test5_exit_result = 0; + +SEC("fsession/bpf_fentry_test7") +int BPF_PROG(test5, struct bpf_fentry_test_t *arg, int ret) +{ + bool is_exit = bpf_fsession_is_return(ctx); + + if (!is_exit) { + if (!arg) + test5_entry_result = ret == 0; + return 0; + } + + if (!arg) + test5_exit_result = 1; + return 0; +} + +__u64 test6_entry_result = 0; +__u64 test6_exit_result = 0; +SEC("fsession/bpf_fentry_test1") +int BPF_PROG(test6, int a) +{ + __u64 addr = bpf_get_func_ip(ctx); + + if (bpf_fsession_is_return(ctx)) + test6_exit_result = (const void *) addr == &bpf_fentry_test1; + else + test6_entry_result = (const void *) addr == &bpf_fentry_test1; + return 0; +} -- 2.52.0