From patchwork Thu Jan 23 14:47:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Maguire X-Patchwork-Id: 11348301 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5FBCB1580 for ; Thu, 23 Jan 2020 14:47:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2647C2073A for ; Thu, 23 Jan 2020 14:47:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="VRBmk66E" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728205AbgAWOrm (ORCPT ); Thu, 23 Jan 2020 09:47:42 -0500 Received: from userp2130.oracle.com ([156.151.31.86]:46128 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727235AbgAWOrm (ORCPT ); Thu, 23 Jan 2020 09:47:42 -0500 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.27/8.16.0.27) with SMTP id 00NERddH119730; Thu, 23 Jan 2020 14:47:37 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2019-08-05; bh=lRWecnHBhGftPr0G0USX+at+/U4EPMsIEQJU7VqrFEM=; b=VRBmk66E0pN1BHcLDoAd5yC0VM2RB9npFrI9yuEaItSGbVsKoGkFtzzcEUc0wx57uwtl kWfj+/SgeJ25V+0wnpQf9hL9D0F6AKkd8o5jcliCREBUtik7/bnLuRnKof6wWcpuWMOu rQrBtSvVGIcKihja5yKdEG+agAinhaJF8E9ycb5BFCY3aL3xCn1yD3Q6TixZZu46LHA7 gzUhgzRY9QDRe6zW0V+oS7lJ2YpUXqTEBGxeutgVDzkq2iKVMjr7iyHIHexl3jbStAWc tu4yyYrnN7IaOncP8sqwy5IN3g62HZ5B8wsM688PxGaL2D1n2bxBqec5Y8Bf9rvqYccS ww== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2130.oracle.com with ESMTP id 2xkseuttpv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Jan 2020 14:47:36 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id 00NET594007741; Thu, 23 Jan 2020 14:47:36 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3030.oracle.com with ESMTP id 2xpq7mw42x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Jan 2020 14:47:36 +0000 Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 00NElZDA031861; Thu, 23 Jan 2020 14:47:35 GMT Received: from dhcp-10-175-173-105.vpn.oracle.com (/10.175.173.105) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 23 Jan 2020 06:47:35 -0800 From: Alan Maguire To: brendanhiggins@google.com Cc: corbet@lwn.net, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Maguire Subject: [PATCH kunit 1/3] kunit: add debugfs /sys/kernel/debug/kunit//results display Date: Thu, 23 Jan 2020 14:47:18 +0000 Message-Id: <1579790840-27009-2-git-send-email-alan.maguire@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1579790840-27009-1-git-send-email-alan.maguire@oracle.com> References: <1579790840-27009-1-git-send-email-alan.maguire@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9508 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=18 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001230124 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9508 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=18 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001230124 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org add debugfs support for displaying kunit test suite results; this is especially useful for module-loaded tests to allow disentangling of test result display from other dmesg events. Signed-off-by: Alan Maguire --- include/kunit/test.h | 21 +++++++--- lib/kunit/Makefile | 3 +- lib/kunit/debugfs.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++ lib/kunit/debugfs.h | 11 +++++ lib/kunit/test.c | 88 ++++++++++++++++++++++++++++++---------- 5 files changed, 206 insertions(+), 28 deletions(-) create mode 100644 lib/kunit/debugfs.c create mode 100644 lib/kunit/debugfs.h diff --git a/include/kunit/test.h b/include/kunit/test.h index 2dfb550..37219b8a 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -125,6 +125,8 @@ struct kunit_case { bool success; }; +#define kunit_status2str(status) (status ? "ok" : "not ok") + /** * KUNIT_CASE - A helper for creating a &struct kunit_case * @@ -157,6 +159,9 @@ struct kunit_suite { int (*init)(struct kunit *test); void (*exit)(struct kunit *test); struct kunit_case *test_cases; + + /* private - internal use only */ + struct dentry *debugfs; }; /** @@ -197,6 +202,15 @@ struct kunit { int kunit_run_tests(struct kunit_suite *suite); +size_t kunit_suite_num_test_cases(struct kunit_suite *suite); + +unsigned int kunit_test_case_num(struct kunit_suite *suite, + struct kunit_case *test_case); + +int __kunit_test_suites_init(struct kunit_suite **suites); + +void __kunit_test_suites_exit(struct kunit_suite **suites); + /** * kunit_test_suites() - used to register one or more &struct kunit_suite * with KUnit. @@ -226,15 +240,12 @@ struct kunit { static struct kunit_suite *suites[] = { __VA_ARGS__, NULL}; \ static int kunit_test_suites_init(void) \ { \ - unsigned int i; \ - for (i = 0; suites[i] != NULL; i++) \ - kunit_run_tests(suites[i]); \ - return 0; \ + return __kunit_test_suites_init(suites); \ } \ late_initcall(kunit_test_suites_init); \ static void __exit kunit_test_suites_exit(void) \ { \ - return; \ + return __kunit_test_suites_exit(suites); \ } \ module_exit(kunit_test_suites_exit) diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile index fab5564..869aab0 100644 --- a/lib/kunit/Makefile +++ b/lib/kunit/Makefile @@ -3,7 +3,8 @@ obj-$(CONFIG_KUNIT) += kunit.o kunit-objs += test.o \ string-stream.o \ assert.o \ - try-catch.o + try-catch.o \ + debugfs.o obj-$(CONFIG_KUNIT_TEST) += kunit-test.o diff --git a/lib/kunit/debugfs.c b/lib/kunit/debugfs.c new file mode 100644 index 0000000..5994f32 --- /dev/null +++ b/lib/kunit/debugfs.c @@ -0,0 +1,111 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2020, Oracle and/or its affiliates. + * Author: Alan Maguire + */ +#include +#include +#include +#include + +#include +#include + +#include "string-stream.h" + +#define KUNIT_DEBUGFS_ROOT "kunit" +#define KUNIT_DEBUGFS_RESULTS "results" + +/* + * Create a debugfs representation of test suites: + * + * Path Semantics + * /sys/kernel/debug/kunit//results Show results of last run for + * testsuite + * + */ + +static struct dentry *debugfs_rootdir; + +void debugfs_cleanup(void) +{ + debugfs_remove(debugfs_rootdir); +} + +int debugfs_init(void) +{ + if (!debugfs_rootdir) + debugfs_rootdir = debugfs_create_dir(KUNIT_DEBUGFS_ROOT, NULL); + if (IS_ERR(debugfs_rootdir)) + return PTR_ERR(debugfs_rootdir); + return 0; +} + +static void debugfs_print_result(struct seq_file *seq, + struct kunit_suite *suite, + struct kunit_case *test_case) +{ + if (!test_case) + return; + + seq_printf(seq, "\t%s %d - %s\n", kunit_status2str(test_case->success), + kunit_test_case_num(suite, test_case), test_case->name); +} + +/* + * /sys/kernel/debug/kunit//results shows all results for testsuite. + */ +static int debugfs_print_results(struct seq_file *seq, void *v) +{ + struct kunit_suite *suite = (struct kunit_suite *)seq->private; + struct kunit_case *test_case; + + if (!suite) + return 0; + + seq_printf(seq, "\t# Subtest: %s\n", suite->name); + seq_printf(seq, "\t1..%zd\n", kunit_suite_num_test_cases(suite)); + + for (test_case = suite->test_cases; test_case->run_case; test_case++) + debugfs_print_result(seq, suite, test_case); + + return 0; +} + +static int debugfs_release(struct inode *inode, struct file *file) +{ + return single_release(inode, file); +} + +static int debugfs_results_open(struct inode *inode, struct file *file) +{ + struct kunit_suite *suite; + + suite = (struct kunit_suite *)inode->i_private; + + return single_open(file, debugfs_print_results, suite); +} + +static const struct file_operations debugfs_results_fops = { + .open = debugfs_results_open, + .read = seq_read, + .llseek = seq_lseek, + .release = debugfs_release, +}; + +void debugfs_create_suite(struct kunit_suite *suite) +{ + /* First add /sys/kernel/debug/kunit/ */ + suite->debugfs = debugfs_create_dir(suite->name, debugfs_rootdir); + if (IS_ERR(suite->debugfs)) + return; + + debugfs_create_file(KUNIT_DEBUGFS_RESULTS, S_IFREG | 0444, + suite->debugfs, + suite, &debugfs_results_fops); +} + +void debugfs_destroy_suite(struct kunit_suite *suite) +{ + debugfs_remove_recursive(suite->debugfs); +} diff --git a/lib/kunit/debugfs.h b/lib/kunit/debugfs.h new file mode 100644 index 0000000..d74e8a4 --- /dev/null +++ b/lib/kunit/debugfs.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020, Oracle and/or its affiliates. + */ + +#include + +void debugfs_create_suite(struct kunit_suite *suite); +void debugfs_destroy_suite(struct kunit_suite *suite); +int debugfs_init(void); +void debugfs_cleanup(void); diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 9242f93..efb05ba 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -10,6 +10,7 @@ #include #include +#include "debugfs.h" #include "string-stream.h" #include "try-catch-impl.h" @@ -28,22 +29,24 @@ static void kunit_print_tap_version(void) } } -static size_t kunit_test_cases_len(struct kunit_case *test_cases) +size_t kunit_suite_num_test_cases(struct kunit_suite *suite) { - struct kunit_case *test_case; + struct kunit_case *test_case, *test_cases = suite->test_cases; size_t len = 0; - for (test_case = test_cases; test_case->run_case; test_case++) + for (test_case = test_cases; test_case && test_case->run_case; + test_case++) len++; return len; } +EXPORT_SYMBOL_GPL(kunit_suite_num_test_cases); static void kunit_print_subtest_start(struct kunit_suite *suite) { kunit_print_tap_version(); pr_info("\t# Subtest: %s\n", suite->name); - pr_info("\t1..%zd\n", kunit_test_cases_len(suite->test_cases)); + pr_info("\t1..%zd\n", kunit_suite_num_test_cases(suite)); } static void kunit_print_ok_not_ok(bool should_indent, @@ -51,19 +54,15 @@ static void kunit_print_ok_not_ok(bool should_indent, size_t test_number, const char *description) { - const char *indent, *ok_not_ok; + const char *indent; if (should_indent) indent = "\t"; else indent = ""; - if (is_ok) - ok_not_ok = "ok"; - else - ok_not_ok = "not ok"; - - pr_info("%s%s %zd - %s\n", indent, ok_not_ok, test_number, description); + pr_info("%s%s %zd - %s\n", indent, kunit_status2str(is_ok), + test_number, description); } static bool kunit_suite_has_succeeded(struct kunit_suite *suite) @@ -87,14 +86,20 @@ static void kunit_print_subtest_end(struct kunit_suite *suite) suite->name); } -static void kunit_print_test_case_ok_not_ok(struct kunit_case *test_case, - size_t test_number) +unsigned int kunit_test_case_num(struct kunit_suite *suite, + struct kunit_case *test_case) { - kunit_print_ok_not_ok(true, - test_case->success, - test_number, - test_case->name); + struct kunit_case *tc; + unsigned int i; + + for (i = 1, tc = suite->test_cases; tc->run_case; tc++, i++) { + if (tc == test_case) + return i; + } + + return 0; } +EXPORT_SYMBOL_GPL(kunit_test_case_num); static void kunit_print_string_stream(struct kunit *test, struct string_stream *stream) @@ -102,6 +107,9 @@ static void kunit_print_string_stream(struct kunit *test, struct string_stream_fragment *fragment; char *buf; + if (string_stream_is_empty(stream)) + return; + buf = string_stream_get_string(stream); if (!buf) { kunit_err(test, @@ -303,19 +311,20 @@ static void kunit_run_case_catch_errors(struct kunit_suite *suite, kunit_try_catch_run(try_catch, &context); test_case->success = test.success; + + kunit_print_ok_not_ok(true, test_case->success, + kunit_test_case_num(suite, test_case), + test_case->name); } int kunit_run_tests(struct kunit_suite *suite) { struct kunit_case *test_case; - size_t test_case_count = 1; kunit_print_subtest_start(suite); - for (test_case = suite->test_cases; test_case->run_case; test_case++) { + for (test_case = suite->test_cases; test_case->run_case; test_case++) kunit_run_case_catch_errors(suite, test_case); - kunit_print_test_case_ok_not_ok(test_case, test_case_count++); - } kunit_print_subtest_end(suite); @@ -323,6 +332,37 @@ int kunit_run_tests(struct kunit_suite *suite) } EXPORT_SYMBOL_GPL(kunit_run_tests); +static void kunit_init_suite(struct kunit_suite *suite) +{ + debugfs_create_suite(suite); +} + +int __kunit_test_suites_init(struct kunit_suite **suites) +{ + unsigned int i; + + for (i = 0; suites[i] != NULL; i++) { + kunit_init_suite(suites[i]); + kunit_run_tests(suites[i]); + } + return 0; +} +EXPORT_SYMBOL_GPL(__kunit_test_suites_init); + +static void kunit_exit_suite(struct kunit_suite *suite) +{ + debugfs_destroy_suite(suite); +} + +void __kunit_test_suites_exit(struct kunit_suite **suites) +{ + unsigned int i; + + for (i = 0; suites[i] != NULL; i++) + kunit_exit_suite(suites[i]); +} +EXPORT_SYMBOL_GPL(__kunit_test_suites_exit); + struct kunit_resource *kunit_alloc_and_get_resource(struct kunit *test, kunit_resource_init_t init, kunit_resource_free_t free, @@ -398,6 +438,9 @@ int kunit_resource_destroy(struct kunit *test, { struct kunit_resource *resource; + if (!test) + kfree(match_data); + resource = kunit_resource_remove(test, match, free, match_data); if (!resource) @@ -489,12 +532,13 @@ void kunit_cleanup(struct kunit *test) static int __init kunit_init(void) { - return 0; + return debugfs_init(); } late_initcall(kunit_init); static void __exit kunit_exit(void) { + debugfs_cleanup(); } module_exit(kunit_exit); From patchwork Thu Jan 23 14:47:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Maguire X-Patchwork-Id: 11348307 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 889AD1580 for ; 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Thu, 23 Jan 2020 14:47:38 GMT Received: from dhcp-10-175-173-105.vpn.oracle.com (/10.175.173.105) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 23 Jan 2020 06:47:37 -0800 From: Alan Maguire To: brendanhiggins@google.com Cc: corbet@lwn.net, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Maguire Subject: [PATCH kunit 2/3] kunit: add "run" debugfs file to run suites, display results Date: Thu, 23 Jan 2020 14:47:19 +0000 Message-Id: <1579790840-27009-3-git-send-email-alan.maguire@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1579790840-27009-1-git-send-email-alan.maguire@oracle.com> References: <1579790840-27009-1-git-send-email-alan.maguire@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9508 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=5 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001230124 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9508 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=5 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001230124 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add /sys/kernel/debug/kunit//run file which will run the specified suite and show results. Signed-off-by: Alan Maguire --- lib/kunit/debugfs.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/lib/kunit/debugfs.c b/lib/kunit/debugfs.c index 5994f32..4881261 100644 --- a/lib/kunit/debugfs.c +++ b/lib/kunit/debugfs.c @@ -15,6 +15,7 @@ #define KUNIT_DEBUGFS_ROOT "kunit" #define KUNIT_DEBUGFS_RESULTS "results" +#define KUNIT_DEBUGFS_RUN "run" /* * Create a debugfs representation of test suites: @@ -23,6 +24,8 @@ * /sys/kernel/debug/kunit//results Show results of last run for * testsuite * + * /sys/kernel/debug/kunit//run Run testsuite and show results + * */ static struct dentry *debugfs_rootdir; @@ -72,6 +75,18 @@ static int debugfs_print_results(struct seq_file *seq, void *v) return 0; } +/* + * /sys/kernel/debug/kunit//run (re)runs suite and shows all results. + */ +static int debugfs_run_print_results(struct seq_file *seq, void *v) +{ + struct kunit_suite *suite = (struct kunit_suite *)seq->private; + + kunit_run_tests(suite); + + return debugfs_print_results(seq, v); +} + static int debugfs_release(struct inode *inode, struct file *file) { return single_release(inode, file); @@ -93,6 +108,22 @@ static int debugfs_results_open(struct inode *inode, struct file *file) .release = debugfs_release, }; +static int debugfs_run_open(struct inode *inode, struct file *file) +{ + struct kunit_suite *suite; + + suite = (struct kunit_suite *)inode->i_private; + + return single_open(file, debugfs_run_print_results, suite); +} + +static const struct file_operations debugfs_run_fops = { + .open = debugfs_run_open, + .read = seq_read, + .llseek = seq_lseek, + .release = debugfs_release, +}; + void debugfs_create_suite(struct kunit_suite *suite) { /* First add /sys/kernel/debug/kunit/ */ @@ -103,6 +134,9 @@ void debugfs_create_suite(struct kunit_suite *suite) debugfs_create_file(KUNIT_DEBUGFS_RESULTS, S_IFREG | 0444, suite->debugfs, suite, &debugfs_results_fops); + debugfs_create_file(KUNIT_DEBUGFS_RUN, S_IFREG | 0444, + suite->debugfs, + suite, &debugfs_run_fops); } void debugfs_destroy_suite(struct kunit_suite *suite) From patchwork Thu Jan 23 14:47:20 2020 Content-Type: text/plain; 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Thu, 23 Jan 2020 14:47:43 +0000 Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 00NElfYJ030974; Thu, 23 Jan 2020 14:47:41 GMT Received: from dhcp-10-175-173-105.vpn.oracle.com (/10.175.173.105) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 23 Jan 2020 06:47:41 -0800 From: Alan Maguire To: brendanhiggins@google.com Cc: corbet@lwn.net, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Maguire Subject: [PATCH kunit 3/3] kunit: update documentation to describe debugfs representation Date: Thu, 23 Jan 2020 14:47:20 +0000 Message-Id: <1579790840-27009-4-git-send-email-alan.maguire@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1579790840-27009-1-git-send-email-alan.maguire@oracle.com> References: <1579790840-27009-1-git-send-email-alan.maguire@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9508 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=5 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001230124 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9508 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=5 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001230124 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Documentation should describe debugfs layout and semantics. Signed-off-by: Alan Maguire --- Documentation/dev-tools/kunit/usage.rst | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/Documentation/dev-tools/kunit/usage.rst b/Documentation/dev-tools/kunit/usage.rst index 7cd56a1..b1ebf9f 100644 --- a/Documentation/dev-tools/kunit/usage.rst +++ b/Documentation/dev-tools/kunit/usage.rst @@ -590,3 +590,23 @@ able to run one test case per invocation. .. TODO(brendanhiggins@google.com): Add an actual example of an architecture dependent KUnit test. + +KUnit debugfs representation +============================ +When kunit test suites are initialized, they create an associated directory +in /sys/kernel/debug/kunit/. The directory contains two files + +- results: "cat results" displays results of last test run +- run: "cat run" runs the test suite and displays the results + +Thus to re-run all currently loaded suites and display results, we can do this: + +``` +$ cat /sys/kernel/debug/kunit/*/run +``` + +The debugfs representation is primarily of use when kunit test suites are +run in a native environment, either as modules or builtin. Having a way +to display results like this is valuable as otherwise results can be +intermixed with other events in dmesg output. +