lib/kunit/executor.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <linux/reboot.h>
   4 #include <kunit/test.h>
   5 #include <linux/glob.h>
   6 #include <linux/moduleparam.h>
   7
   8 /*
   9  * These symbols point to the .kunit_test_suites section and are defined in
  10  * include/asm-generic/vmlinux.lds.h, and consequently must be extern.
  11  */
  12 extern struct kunit_suite * const * const __kunit_suites_start[];
  13 extern struct kunit_suite * const * const __kunit_suites_end[];
  14
  15 #if IS_BUILTIN(CONFIG_KUNIT)
  16
  17 static char *filter_glob_param;
  18 module_param_named(filter_glob, filter_glob_param, charp, 0);
  19 MODULE_PARM_DESC(filter_glob,
  20                 "Filter which KUnit test suites run at boot-time, e.g. list*");
  21
  22 static char *kunit_shutdown;
  23 core_param(kunit_shutdown, kunit_shutdown, charp, 0644);
  24
  25 static struct kunit_suite * const *
  26 kunit_filter_subsuite(struct kunit_suite * const * const subsuite,
  27                         const char *filter_glob)
  28 {
  29         int i, n = 0;
  30         struct kunit_suite **filtered;
  31
  32         n = 0;
  33         for (i = 0; subsuite[i] != NULL; ++i) {
  34                 if (glob_match(filter_glob, subsuite[i]->name))
  35                         ++n;
  36         }
  37
  38         if (n == 0)
  39                 return NULL;
  40
  41         filtered = kmalloc_array(n + 1, sizeof(*filtered), GFP_KERNEL);
  42         if (!filtered)
  43                 return NULL;
  44
  45         n = 0;
  46         for (i = 0; subsuite[i] != NULL; ++i) {
  47                 if (glob_match(filter_glob, subsuite[i]->name))
  48                         filtered[n++] = subsuite[i];
  49         }
  50         filtered[n] = NULL;
  51
  52         return filtered;
  53 }
  54
  55 struct suite_set {
  56         struct kunit_suite * const * const *start;
  57         struct kunit_suite * const * const *end;
  58 };
  59
  60 static struct suite_set kunit_filter_suites(const struct suite_set *suite_set,
  61                                             const char *filter_glob)
  62 {
  63         int i;
  64         struct kunit_suite * const **copy, * const *filtered_subsuite;
  65         struct suite_set filtered;
  66
  67         const size_t max = suite_set->end - suite_set->start;
  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(suite_set->start[i], filter_glob);
  78                 if (filtered_subsuite)
  79                         *copy++ = filtered_subsuite;
  80         }
  81         filtered.end = copy;
  82         return filtered;
  83 }
  84
  85 static void kunit_handle_shutdown(void)
  86 {
  87         if (!kunit_shutdown)
  88                 return;
  89
  90         if (!strcmp(kunit_shutdown, "poweroff"))
  91                 kernel_power_off();
  92         else if (!strcmp(kunit_shutdown, "halt"))
  93                 kernel_halt();
  94         else if (!strcmp(kunit_shutdown, "reboot"))
  95                 kernel_restart(NULL);
  96
  97 }
  98
  99 static void kunit_print_tap_header(struct suite_set *suite_set)
 100 {
 101         struct kunit_suite * const * const *suites, * const *subsuite;
 102         int num_of_suites = 0;
 103
 104         for (suites = suite_set->start; suites < suite_set->end; suites++)
 105                 for (subsuite = *suites; *subsuite != NULL; subsuite++)
 106                         num_of_suites++;
 107
 108         pr_info("TAP version 14\n");
 109         pr_info("1..%d\n", num_of_suites);
 110 }
 111
 112 int kunit_run_all_tests(void)
 113 {
 114         struct kunit_suite * const * const *suites;
 115         struct suite_set suite_set = {
 116                 .start = __kunit_suites_start,
 117                 .end = __kunit_suites_end,
 118         };
 119
 120         if (filter_glob_param)
 121                 suite_set = kunit_filter_suites(&suite_set, filter_glob_param);
 122
 123         kunit_print_tap_header(&suite_set);
 124
 125         for (suites = suite_set.start; suites < suite_set.end; suites++)
 126                 __kunit_test_suites_init(*suites);
 127
 128         if (filter_glob_param) { /* a copy was made of each array */
 129                 for (suites = suite_set.start; suites < suite_set.end; suites++)
 130                         kfree(*suites);
 131                 kfree(suite_set.start);
 132         }
 133
 134         kunit_handle_shutdown();
 135
 136         return 0;
 137 }
 138
 139 #if IS_BUILTIN(CONFIG_KUNIT_TEST)
 140 #include "executor_test.c"
 141 #endif
 142
 143 #endif /* IS_BUILTIN(CONFIG_KUNIT) */