From patchwork Tue Dec 19 21:21:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13499113 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 DA3D03B795; Tue, 19 Dec 2023 21:21:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OXdOslmS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE7C7C433CB; Tue, 19 Dec 2023 21:21:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1703020893; bh=/6Du62khS6+mPSPQl4NojRywrcNucj3y1bs+UHh2N8s=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=OXdOslmSRGeSw/+OMUsivb/kKzI+9FouykNEE4GpU/0ODqi3Fwu+flD6SvKib0Wxt MjB5ErEmP5FlpAPBuwKVtfX5aOnbRxeyppFwWh7WjzLcxiwgiaSgwV/s8aS8zW1TKd lp2TZDj6XYAX6k1IYba7rcVmHdPr01IopVM+WUNdoaCxnRveIuUFGDpmmflm7/RC6Q zXukACwOe++PuEcJks89O39FxzxnMs4wu2TQdoNH/yHeawegU9VUNmk/LGZRw7eHSQ eOXlI3sYUN2Si5oEkPFXmfOcaG2Otz8YqO5IrupiTpHEsMz9n+t4TAd0iGaSLFCccK nYdILJ+G3PWaA== From: Mark Brown Date: Tue, 19 Dec 2023 21:21:19 +0000 Subject: [PATCH 1/2] kselftest/seccomp: Use kselftest output functions for benchmark Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231219-b4-kselftest-seccomp-benchmark-ktap-v1-1-f99e228631b0@kernel.org> References: <20231219-b4-kselftest-seccomp-benchmark-ktap-v1-0-f99e228631b0@kernel.org> In-Reply-To: <20231219-b4-kselftest-seccomp-benchmark-ktap-v1-0-f99e228631b0@kernel.org> To: Kees Cook , Andy Lutomirski , Will Drewry , Shuah Khan Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Mark Brown X-Mailer: b4 0.13-dev-5c066 X-Developer-Signature: v=1; a=openpgp-sha256; l=6298; i=broonie@kernel.org; h=from:subject:message-id; bh=/6Du62khS6+mPSPQl4NojRywrcNucj3y1bs+UHh2N8s=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlgglY3Xqud3QDQGsOnu6Bl17eNqabR/vKtLwyr5JZ uRGIzIeJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZYIJWAAKCRAk1otyXVSH0NSjB/ 9gD1x2kzPfLXrhhQNuWZ+Okq9MOR363rrV1tgbPP/4y6f84snqLvjABf5o2wTYSg6euIuuhcNUbYXH c314rrtmK+sVHptDlndr+pbYWZGZlsznLGOLo8rerX18RfQKsPykt04XlMigV00/DfUsSCIXdAnOev eeVqd1L/XVdbYwjNCqzZjLMWqgpoMQqkCJMS8BEmy+kGXh5PWJpO9XixtllYRpYRJpP4n8xreqtHgO homNQrHpG5fNtqqKCBEcYUf6UUtxjxTQFZMT6v2YyWjYf4+hOp+MsnVfhJjJe0jm/Vt1PDJ6ddE6Ed 0TtQEsx/kljB6lv/Hre3MQOgt7mf/u X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB In preparation for trying to output the test results themselves in TAP format rework all the prints in the benchmark to use the kselftest output functions. The uses of system() all produce single line output so we can avoid having to deal with fully managing the child process and continue to use system() by simply printing an empty message before we invoke system(). We also leave one printf() used to complete a line of output in place. Signed-off-by: Mark Brown --- .../testing/selftests/seccomp/seccomp_benchmark.c | 45 ++++++++++++---------- 1 file changed, 24 insertions(+), 21 deletions(-) diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c index 5b5c9d558dee..93168dd2c1e3 100644 --- a/tools/testing/selftests/seccomp/seccomp_benchmark.c +++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c @@ -38,10 +38,10 @@ unsigned long long timing(clockid_t clk_id, unsigned long long samples) i *= 1000000000ULL; i += finish.tv_nsec - start.tv_nsec; - printf("%lu.%09lu - %lu.%09lu = %llu (%.1fs)\n", - finish.tv_sec, finish.tv_nsec, - start.tv_sec, start.tv_nsec, - i, (double)i / 1000000000.0); + ksft_print_msg("%lu.%09lu - %lu.%09lu = %llu (%.1fs)\n", + finish.tv_sec, finish.tv_nsec, + start.tv_sec, start.tv_nsec, + i, (double)i / 1000000000.0); return i; } @@ -53,7 +53,7 @@ unsigned long long calibrate(void) pid_t pid, ret; int seconds = 15; - printf("Calibrating sample size for %d seconds worth of syscalls ...\n", seconds); + ksft_print_msg("Calibrating sample size for %d seconds worth of syscalls ...\n", seconds); samples = 0; pid = getpid(); @@ -102,14 +102,14 @@ long compare(const char *name_one, const char *name_eval, const char *name_two, { bool good; - printf("\t%s %s %s (%lld %s %lld): ", name_one, name_eval, name_two, - (long long)one, name_eval, (long long)two); + ksft_print_msg("\t%s %s %s (%lld %s %lld): ", name_one, name_eval, name_two, + (long long)one, name_eval, (long long)two); if (one > INT_MAX) { - printf("Miscalculation! Measurement went negative: %lld\n", (long long)one); + ksft_print_msg("Miscalculation! Measurement went negative: %lld\n", (long long)one); return 1; } if (two > INT_MAX) { - printf("Miscalculation! Measurement went negative: %lld\n", (long long)two); + ksft_print_msg("Miscalculation! Measurement went negative: %lld\n", (long long)two); return 1; } @@ -145,12 +145,15 @@ int main(int argc, char *argv[]) setbuf(stdout, NULL); - printf("Running on:\n"); + ksft_print_msg("Running on:\n"); + ksft_print_msg(""); system("uname -a"); - printf("Current BPF sysctl settings:\n"); + ksft_print_msg("Current BPF sysctl settings:\n"); /* Avoid using "sysctl" which may not be installed. */ + ksft_print_msg(""); system("grep -H . /proc/sys/net/core/bpf_jit_enable"); + ksft_print_msg(""); system("grep -H . /proc/sys/net/core/bpf_jit_harden"); if (argc > 1) @@ -158,11 +161,11 @@ int main(int argc, char *argv[]) else samples = calibrate(); - printf("Benchmarking %llu syscalls...\n", samples); + ksft_print_msg("Benchmarking %llu syscalls...\n", samples); /* Native call */ native = timing(CLOCK_PROCESS_CPUTIME_ID, samples) / samples; - printf("getpid native: %llu ns\n", native); + ksft_print_msg("getpid native: %llu ns\n", native); ret = prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0); assert(ret == 0); @@ -172,33 +175,33 @@ int main(int argc, char *argv[]) assert(ret == 0); bitmap1 = timing(CLOCK_PROCESS_CPUTIME_ID, samples) / samples; - printf("getpid RET_ALLOW 1 filter (bitmap): %llu ns\n", bitmap1); + ksft_print_msg("getpid RET_ALLOW 1 filter (bitmap): %llu ns\n", bitmap1); /* Second filter resulting in a bitmap */ ret = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &bitmap_prog); assert(ret == 0); bitmap2 = timing(CLOCK_PROCESS_CPUTIME_ID, samples) / samples; - printf("getpid RET_ALLOW 2 filters (bitmap): %llu ns\n", bitmap2); + ksft_print_msg("getpid RET_ALLOW 2 filters (bitmap): %llu ns\n", bitmap2); /* Third filter, can no longer be converted to bitmap */ ret = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog); assert(ret == 0); filter1 = timing(CLOCK_PROCESS_CPUTIME_ID, samples) / samples; - printf("getpid RET_ALLOW 3 filters (full): %llu ns\n", filter1); + ksft_print_msg("getpid RET_ALLOW 3 filters (full): %llu ns\n", filter1); /* Fourth filter, can not be converted to bitmap because of filter 3 */ ret = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &bitmap_prog); assert(ret == 0); filter2 = timing(CLOCK_PROCESS_CPUTIME_ID, samples) / samples; - printf("getpid RET_ALLOW 4 filters (full): %llu ns\n", filter2); + ksft_print_msg("getpid RET_ALLOW 4 filters (full): %llu ns\n", filter2); /* Estimations */ #define ESTIMATE(fmt, var, what) do { \ var = (what); \ - printf("Estimated " fmt ": %llu ns\n", var); \ + ksft_print_msg("Estimated " fmt ": %llu ns\n", var); \ if (var > INT_MAX) \ goto more_samples; \ } while (0) @@ -218,7 +221,7 @@ int main(int argc, char *argv[]) ESTIMATE("seccomp per-filter overhead (filters / 4)", per_filter2, (filter2 - native - entry) / 4); - printf("Expectations:\n"); + ksft_print_msg("Expectations:\n"); ret |= compare("native", "≤", "1 bitmap", native, le, bitmap1); bits = compare("native", "≤", "1 filter", native, le, filter1); if (bits) @@ -230,7 +233,7 @@ int main(int argc, char *argv[]) bits = compare("1 bitmapped", "≈", "2 bitmapped", bitmap1 - native, approx, bitmap2 - native); if (bits) { - printf("Skipping constant action bitmap expectations: they appear unsupported.\n"); + ksft_print_msg("Skipping constant action bitmap expectations: they appear unsupported.\n"); goto out; } @@ -242,7 +245,7 @@ int main(int argc, char *argv[]) goto out; more_samples: - printf("Saw unexpected benchmark result. Try running again with more samples?\n"); + ksft_print_msg("Saw unexpected benchmark result. Try running again with more samples?\n"); out: return 0; } From patchwork Tue Dec 19 21:21:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13499114 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 B76EC3DB80; Tue, 19 Dec 2023 21:21:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SHvpMbPs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5B28C43395; Tue, 19 Dec 2023 21:21:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1703020895; bh=oA1pNNbJ63oV11EYi9Wh6Pn+MBONE49Y/f+8c5yfJbw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=SHvpMbPsZ7dBP2btm3EjUSGBxL5/UhcQLmA6zmhiHyL9EIHspgoFFvMkIwZLDZW4F ALsXSzzekC86VG73Y51lOc7PItd71kADnawDQwRgTTutdGLDjBuTZzWAg9vqhzFDtn HlZ7k4DDV/H4UXpb7sim0H/O4PtYoL6JZvg8Xes0YrHv8+PwYvNiS0Ub2HaM2tg8YN zqWVRXelcW52Jhb2si/JCIVDYoSwPGoULyHW00PSH1/cFq3/mYwOARyBAEBiEHkEHV 7bbkvPaLRetDixMh4B8xPy8+nPqGpX5Pt9ABxAnfne2Tn/CC4IXIfv/j/wKNBmhb+a 6Iql2UVKSPZSg== From: Mark Brown Date: Tue, 19 Dec 2023 21:21:20 +0000 Subject: [PATCH 2/2] kselftest/seccomp: Report each expectation we assert as a KTAP test Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231219-b4-kselftest-seccomp-benchmark-ktap-v1-2-f99e228631b0@kernel.org> References: <20231219-b4-kselftest-seccomp-benchmark-ktap-v1-0-f99e228631b0@kernel.org> In-Reply-To: <20231219-b4-kselftest-seccomp-benchmark-ktap-v1-0-f99e228631b0@kernel.org> To: Kees Cook , Andy Lutomirski , Will Drewry , Shuah Khan Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Mark Brown X-Mailer: b4 0.13-dev-5c066 X-Developer-Signature: v=1; a=openpgp-sha256; l=4967; i=broonie@kernel.org; h=from:subject:message-id; bh=oA1pNNbJ63oV11EYi9Wh6Pn+MBONE49Y/f+8c5yfJbw=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlgglYESeKHvJrPrwFkWxo4TJbTH8YEb4zmiEYdAzx PebQDZ6JATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZYIJWAAKCRAk1otyXVSH0JoWB/ 9vgsFFxdsHgH+8hjqI3qPD2D1DdeuyCO8vYvasUYRqvkyMUZaOp0rQll2+nMWgYk+gNxu8Wc6pxbv1 xKlk1zYOiiHDb5o89SYoXdlZ918i1TY0B1V0RTii7OnrOhjZmH5QkmnEmsSOKmbCS/nP5iEePtZO0g ESdaVNBqjHxJjl20baGYT4UfAvMm663COAMA6+LdIv0gWL7JJiwKr0nBuLz6hDKhGb/RXAPFjU02oW CDerwPTxrzyqm3il2pXSqkf2A7DBtgNB1hVr8NO7eQQohL/6BrncR2HXEUa9yeiLqD2pvgtP8qzAxi CWlPpB+gM0R2zI7PYgEhN3nk3xXAU9 X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB The seccomp benchmark test makes a number of checks on the performance it measures and logs them to the output but does so in a custom format which none of the automated test runners understand meaning that the chances that anyone is paying attention are slim. Let's additionally log each result in KTAP format so that automated systems parsing the test output will see each comparison as a test case. The original logs are left in place since they provide the actual numbers for analysis. As part of this rework the flow for the main program so that when we skip tests we still log all the tests we skip, this is because the standard KTAP headers and footers include counts of the number of expected and run tests. --- .../testing/selftests/seccomp/seccomp_benchmark.c | 62 +++++++++++++++------- 1 file changed, 42 insertions(+), 20 deletions(-) diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c index 93168dd2c1e3..436a527b8235 100644 --- a/tools/testing/selftests/seccomp/seccomp_benchmark.c +++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c @@ -98,24 +98,36 @@ bool le(int i_one, int i_two) } long compare(const char *name_one, const char *name_eval, const char *name_two, - unsigned long long one, bool (*eval)(int, int), unsigned long long two) + unsigned long long one, bool (*eval)(int, int), unsigned long long two, + bool skip) { bool good; + if (skip) { + ksft_test_result_skip("%s %s %s\n", name_one, name_eval, + name_two); + return 0; + } + ksft_print_msg("\t%s %s %s (%lld %s %lld): ", name_one, name_eval, name_two, (long long)one, name_eval, (long long)two); if (one > INT_MAX) { ksft_print_msg("Miscalculation! Measurement went negative: %lld\n", (long long)one); - return 1; + good = false; + goto out; } if (two > INT_MAX) { ksft_print_msg("Miscalculation! Measurement went negative: %lld\n", (long long)two); - return 1; + good = false; + goto out; } good = eval(one, two); printf("%s\n", good ? "✔️" : "❌"); +out: + ksft_test_result(good, "%s %s %s\n", name_one, name_eval, name_two); + return good ? 0 : 1; } @@ -142,9 +154,13 @@ int main(int argc, char *argv[]) unsigned long long samples, calc; unsigned long long native, filter1, filter2, bitmap1, bitmap2; unsigned long long entry, per_filter1, per_filter2; + bool skip = false; setbuf(stdout, NULL); + ksft_print_header(); + ksft_set_plan(7); + ksft_print_msg("Running on:\n"); ksft_print_msg(""); system("uname -a"); @@ -202,8 +218,10 @@ int main(int argc, char *argv[]) #define ESTIMATE(fmt, var, what) do { \ var = (what); \ ksft_print_msg("Estimated " fmt ": %llu ns\n", var); \ - if (var > INT_MAX) \ - goto more_samples; \ + if (var > INT_MAX) { \ + skip = true; \ + ret |= 1; \ + } \ } while (0) ESTIMATE("total seccomp overhead for 1 bitmapped filter", calc, @@ -222,30 +240,34 @@ int main(int argc, char *argv[]) (filter2 - native - entry) / 4); ksft_print_msg("Expectations:\n"); - ret |= compare("native", "≤", "1 bitmap", native, le, bitmap1); - bits = compare("native", "≤", "1 filter", native, le, filter1); + ret |= compare("native", "≤", "1 bitmap", native, le, bitmap1, + skip); + bits = compare("native", "≤", "1 filter", native, le, filter1, + skip); if (bits) - goto more_samples; + skip = true; ret |= compare("per-filter (last 2 diff)", "≈", "per-filter (filters / 4)", - per_filter1, approx, per_filter2); + per_filter1, approx, per_filter2, skip); bits = compare("1 bitmapped", "≈", "2 bitmapped", - bitmap1 - native, approx, bitmap2 - native); + bitmap1 - native, approx, bitmap2 - native, skip); if (bits) { ksft_print_msg("Skipping constant action bitmap expectations: they appear unsupported.\n"); - goto out; + skip = true; } - ret |= compare("entry", "≈", "1 bitmapped", entry, approx, bitmap1 - native); - ret |= compare("entry", "≈", "2 bitmapped", entry, approx, bitmap2 - native); + ret |= compare("entry", "≈", "1 bitmapped", entry, approx, + bitmap1 - native, skip); + ret |= compare("entry", "≈", "2 bitmapped", entry, approx, + bitmap2 - native, skip); ret |= compare("native + entry + (per filter * 4)", "≈", "4 filters total", - entry + (per_filter1 * 4) + native, approx, filter2); - if (ret == 0) - goto out; + entry + (per_filter1 * 4) + native, approx, filter2, + skip); -more_samples: - ksft_print_msg("Saw unexpected benchmark result. Try running again with more samples?\n"); -out: - return 0; + if (ret) { + ksft_print_msg("Saw unexpected benchmark result. Try running again with more samples?\n"); + } + + ksft_finished(); }