Merge existing fixes from spi/for-5.12
[linux-2.6-microblaze.git] / lib / kunit / executor.c
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  */
11 extern struct kunit_suite * const * const __kunit_suites_start[];
12 extern struct kunit_suite * const * const __kunit_suites_end[];
13
14 #if IS_BUILTIN(CONFIG_KUNIT)
15
16 static char *filter_glob;
17 module_param(filter_glob, charp, 0);
18 MODULE_PARM_DESC(filter_glob,
19                 "Filter which KUnit test suites run at boot-time, e.g. list*");
20
21 static struct kunit_suite * const *
22 kunit_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
50 struct suite_set {
51         struct kunit_suite * const * const *start;
52         struct kunit_suite * const * const *end;
53 };
54
55 static 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
85 static 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
98 int 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) */