Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2
3#include <kunit/test.h>
4#include <linux/glob.h>
5#include <linux/moduleparam.h>
6
7/*
8 * These symbols point to the .kunit_test_suites section and are defined in
9 * include/asm-generic/vmlinux.lds.h, and consequently must be extern.
10 */
11extern struct kunit_suite * const * const __kunit_suites_start[];
12extern struct kunit_suite * const * const __kunit_suites_end[];
13
14#if IS_BUILTIN(CONFIG_KUNIT)
15
16static char *filter_glob;
17module_param(filter_glob, charp, 0);
18MODULE_PARM_DESC(filter_glob,
19 "Filter which KUnit test suites run at boot-time, e.g. list*");
20
21static struct kunit_suite * const *
22kunit_filter_subsuite(struct kunit_suite * const * const subsuite)
23{
24 int i, n = 0;
25 struct kunit_suite **filtered;
26
27 n = 0;
28 for (i = 0; subsuite[i] != NULL; ++i) {
29 if (glob_match(filter_glob, subsuite[i]->name))
30 ++n;
31 }
32
33 if (n == 0)
34 return NULL;
35
36 filtered = kmalloc_array(n + 1, sizeof(*filtered), GFP_KERNEL);
37 if (!filtered)
38 return NULL;
39
40 n = 0;
41 for (i = 0; subsuite[i] != NULL; ++i) {
42 if (glob_match(filter_glob, subsuite[i]->name))
43 filtered[n++] = subsuite[i];
44 }
45 filtered[n] = NULL;
46
47 return filtered;
48}
49
50struct suite_set {
51 struct kunit_suite * const * const *start;
52 struct kunit_suite * const * const *end;
53};
54
55static struct suite_set kunit_filter_suites(void)
56{
57 int i;
58 struct kunit_suite * const **copy, * const *filtered_subsuite;
59 struct suite_set filtered;
60
61 const size_t max = __kunit_suites_end - __kunit_suites_start;
62
63 if (!filter_glob) {
64 filtered.start = __kunit_suites_start;
65 filtered.end = __kunit_suites_end;
66 return filtered;
67 }
68
69 copy = kmalloc_array(max, sizeof(*filtered.start), GFP_KERNEL);
70 filtered.start = copy;
71 if (!copy) { /* won't be able to run anything, return an empty set */
72 filtered.end = copy;
73 return filtered;
74 }
75
76 for (i = 0; i < max; ++i) {
77 filtered_subsuite = kunit_filter_subsuite(__kunit_suites_start[i]);
78 if (filtered_subsuite)
79 *copy++ = filtered_subsuite;
80 }
81 filtered.end = copy;
82 return filtered;
83}
84
85static void kunit_print_tap_header(struct suite_set *suite_set)
86{
87 struct kunit_suite * const * const *suites, * const *subsuite;
88 int num_of_suites = 0;
89
90 for (suites = suite_set->start; suites < suite_set->end; suites++)
91 for (subsuite = *suites; *subsuite != NULL; subsuite++)
92 num_of_suites++;
93
94 pr_info("TAP version 14\n");
95 pr_info("1..%d\n", num_of_suites);
96}
97
98int kunit_run_all_tests(void)
99{
100 struct kunit_suite * const * const *suites;
101
102 struct suite_set suite_set = kunit_filter_suites();
103
104 kunit_print_tap_header(&suite_set);
105
106 for (suites = suite_set.start; suites < suite_set.end; suites++)
107 __kunit_test_suites_init(*suites);
108
109 if (filter_glob) { /* a copy was made of each array */
110 for (suites = suite_set.start; suites < suite_set.end; suites++)
111 kfree(*suites);
112 kfree(suite_set.start);
113 }
114
115 return 0;
116}
117
118#endif /* IS_BUILTIN(CONFIG_KUNIT) */