cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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debugfs.c (2817B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (c) 2020, Oracle and/or its affiliates.
      4 *    Author: Alan Maguire <alan.maguire@oracle.com>
      5 */
      6
      7#include <linux/debugfs.h>
      8#include <linux/module.h>
      9
     10#include <kunit/test.h>
     11
     12#include "string-stream.h"
     13
     14#define KUNIT_DEBUGFS_ROOT             "kunit"
     15#define KUNIT_DEBUGFS_RESULTS          "results"
     16
     17/*
     18 * Create a debugfs representation of test suites:
     19 *
     20 * Path						Semantics
     21 * /sys/kernel/debug/kunit/<testsuite>/results	Show results of last run for
     22 *						testsuite
     23 *
     24 */
     25
     26static struct dentry *debugfs_rootdir;
     27
     28void kunit_debugfs_cleanup(void)
     29{
     30	debugfs_remove_recursive(debugfs_rootdir);
     31}
     32
     33void kunit_debugfs_init(void)
     34{
     35	if (!debugfs_rootdir)
     36		debugfs_rootdir = debugfs_create_dir(KUNIT_DEBUGFS_ROOT, NULL);
     37}
     38
     39static void debugfs_print_result(struct seq_file *seq,
     40				 struct kunit_suite *suite,
     41				 struct kunit_case *test_case)
     42{
     43	if (!test_case || !test_case->log)
     44		return;
     45
     46	seq_printf(seq, "%s", test_case->log);
     47}
     48
     49/*
     50 * /sys/kernel/debug/kunit/<testsuite>/results shows all results for testsuite.
     51 */
     52static int debugfs_print_results(struct seq_file *seq, void *v)
     53{
     54	struct kunit_suite *suite = (struct kunit_suite *)seq->private;
     55	enum kunit_status success = kunit_suite_has_succeeded(suite);
     56	struct kunit_case *test_case;
     57
     58	if (!suite || !suite->log)
     59		return 0;
     60
     61	seq_printf(seq, "%s", suite->log);
     62
     63	kunit_suite_for_each_test_case(suite, test_case)
     64		debugfs_print_result(seq, suite, test_case);
     65
     66	seq_printf(seq, "%s %d - %s\n",
     67		   kunit_status_to_ok_not_ok(success), 1, suite->name);
     68	return 0;
     69}
     70
     71static int debugfs_release(struct inode *inode, struct file *file)
     72{
     73	return single_release(inode, file);
     74}
     75
     76static int debugfs_results_open(struct inode *inode, struct file *file)
     77{
     78	struct kunit_suite *suite;
     79
     80	suite = (struct kunit_suite *)inode->i_private;
     81
     82	return single_open(file, debugfs_print_results, suite);
     83}
     84
     85static const struct file_operations debugfs_results_fops = {
     86	.open = debugfs_results_open,
     87	.read = seq_read,
     88	.llseek = seq_lseek,
     89	.release = debugfs_release,
     90};
     91
     92void kunit_debugfs_create_suite(struct kunit_suite *suite)
     93{
     94	struct kunit_case *test_case;
     95
     96	/* Allocate logs before creating debugfs representation. */
     97	suite->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL);
     98	kunit_suite_for_each_test_case(suite, test_case)
     99		test_case->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL);
    100
    101	suite->debugfs = debugfs_create_dir(suite->name, debugfs_rootdir);
    102
    103	debugfs_create_file(KUNIT_DEBUGFS_RESULTS, S_IFREG | 0444,
    104			    suite->debugfs,
    105			    suite, &debugfs_results_fops);
    106}
    107
    108void kunit_debugfs_destroy_suite(struct kunit_suite *suite)
    109{
    110	struct kunit_case *test_case;
    111
    112	debugfs_remove_recursive(suite->debugfs);
    113	kfree(suite->log);
    114	kunit_suite_for_each_test_case(suite, test_case)
    115		kfree(test_case->log);
    116}