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e2219db280
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. debugfs support is provided if CONFIG_KUNIT_DEBUGFS=y. As well as printk()ing messages, we append them to a per-test log. Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Reviewed-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2020, Oracle and/or its affiliates.
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* Author: Alan Maguire <alan.maguire@oracle.com>
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*/
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include <kunit/test.h>
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#include "string-stream.h"
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#define KUNIT_DEBUGFS_ROOT "kunit"
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#define KUNIT_DEBUGFS_RESULTS "results"
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/*
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* Create a debugfs representation of test suites:
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*
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* Path Semantics
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* /sys/kernel/debug/kunit/<testsuite>/results Show results of last run for
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* testsuite
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*
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*/
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static struct dentry *debugfs_rootdir;
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void kunit_debugfs_cleanup(void)
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{
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debugfs_remove_recursive(debugfs_rootdir);
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}
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void kunit_debugfs_init(void)
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{
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if (!debugfs_rootdir)
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debugfs_rootdir = debugfs_create_dir(KUNIT_DEBUGFS_ROOT, NULL);
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}
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static void debugfs_print_result(struct seq_file *seq,
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struct kunit_suite *suite,
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struct kunit_case *test_case)
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{
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if (!test_case || !test_case->log)
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return;
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seq_printf(seq, "%s", test_case->log);
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}
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/*
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* /sys/kernel/debug/kunit/<testsuite>/results shows all results for testsuite.
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*/
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static int debugfs_print_results(struct seq_file *seq, void *v)
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{
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struct kunit_suite *suite = (struct kunit_suite *)seq->private;
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bool success = kunit_suite_has_succeeded(suite);
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struct kunit_case *test_case;
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if (!suite || !suite->log)
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return 0;
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seq_printf(seq, "%s", suite->log);
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kunit_suite_for_each_test_case(suite, test_case)
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debugfs_print_result(seq, suite, test_case);
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seq_printf(seq, "%s %d - %s\n",
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kunit_status_to_string(success), 1, suite->name);
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return 0;
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}
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static int debugfs_release(struct inode *inode, struct file *file)
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{
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return single_release(inode, file);
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}
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static int debugfs_results_open(struct inode *inode, struct file *file)
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{
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struct kunit_suite *suite;
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suite = (struct kunit_suite *)inode->i_private;
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return single_open(file, debugfs_print_results, suite);
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}
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static const struct file_operations debugfs_results_fops = {
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.open = debugfs_results_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = debugfs_release,
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};
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void kunit_debugfs_create_suite(struct kunit_suite *suite)
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{
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struct kunit_case *test_case;
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/* Allocate logs before creating debugfs representation. */
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suite->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL);
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kunit_suite_for_each_test_case(suite, test_case)
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test_case->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL);
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suite->debugfs = debugfs_create_dir(suite->name, debugfs_rootdir);
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debugfs_create_file(KUNIT_DEBUGFS_RESULTS, S_IFREG | 0444,
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suite->debugfs,
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suite, &debugfs_results_fops);
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}
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void kunit_debugfs_destroy_suite(struct kunit_suite *suite)
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{
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struct kunit_case *test_case;
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debugfs_remove_recursive(suite->debugfs);
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kfree(suite->log);
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kunit_suite_for_each_test_case(suite, test_case)
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kfree(test_case->log);
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}
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