// SPDX-License-Identifier: GPL-2.0/* * Copyright (c) 2020, Oracle and/or its affiliates. *    Author: Alan Maguire <alan.maguire@oracle.com> */ #include <linux/debugfs.h>#include <linux/module.h> #include <kunit/test.h> #include "string-stream.h"#include "debugfs.h" #define KUNIT_DEBUGFS_ROOT             "kunit"#define KUNIT_DEBUGFS_RESULTS          "results" /* * Create a debugfs representation of test suites: * * Path						Semantics * /sys/kernel/debug/kunit/<testsuite>/results	Show results of last run for *						testsuite * */ static struct dentry *debugfs_rootdir; void kunit_debugfs_cleanup(void){	debugfs_remove_recursive(debugfs_rootdir);} void kunit_debugfs_init(void){	if (!debugfs_rootdir)		debugfs_rootdir = debugfs_create_dir(KUNIT_DEBUGFS_ROOT, NULL);} static void debugfs_print_result(struct seq_file *seq,				 struct kunit_suite *suite,				 struct kunit_case *test_case){	if (!test_case || !test_case->log)		return; 	seq_printf(seq, "%s", test_case->log);} /* * /sys/kernel/debug/kunit/<testsuite>/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;	enum kunit_status success = kunit_suite_has_succeeded(suite);	struct kunit_case *test_case; 	if (!suite)		return 0; 	/* Print KTAP header so the debugfs log can be parsed as valid KTAP. */	seq_puts(seq, "KTAP version 1\n");	seq_puts(seq, "1..1\n"); 	/* Print suite header because it is not stored in the test logs. */	seq_puts(seq, KUNIT_SUBTEST_INDENT "KTAP version 1\n");	seq_printf(seq, KUNIT_SUBTEST_INDENT "# Subtest: %s\n", suite->name);	seq_printf(seq, KUNIT_SUBTEST_INDENT "1..%zd\n", kunit_suite_num_test_cases(suite)); 	kunit_suite_for_each_test_case(suite, test_case)		debugfs_print_result(seq, suite, test_case); 	if (suite->log)		seq_printf(seq, "%s", suite->log); 	seq_printf(seq, "%s %d %s\n",		   kunit_status_to_ok_not_ok(success), 1, suite->name);	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 kunit_debugfs_create_suite(struct kunit_suite *suite){	struct kunit_case *test_case; 	/* Allocate logs before creating debugfs representation. */	suite->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL);	kunit_suite_for_each_test_case(suite, test_case)		test_case->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL); 	suite->debugfs = debugfs_create_dir(suite->name, debugfs_rootdir); 	debugfs_create_file(KUNIT_DEBUGFS_RESULTS, S_IFREG | 0444,			    suite->debugfs,			    suite, &debugfs_results_fops);} void kunit_debugfs_destroy_suite(struct kunit_suite *suite){	struct kunit_case *test_case; 	debugfs_remove_recursive(suite->debugfs);	kfree(suite->log);	kunit_suite_for_each_test_case(suite, test_case)		kfree(test_case->log);}