LXR linux/tools/testing/selftests/bpf/prog_tests/cpu

   1// SPDX-License-Identifier: GPL-2.0
   2#include <test_progs.h>
   3#include <bpf/btf.h>
   4#include "bpf/libbpf_internal.h"
   5
   6static int duration = 0;
   7
   8static void validate_mask(int case_nr, const char *exp, bool *mask, int n)
   9{
  10        int i;
  11
  12        for (i = 0; exp[i]; i++) {
  13                if (exp[i] == '1') {
  14                        if (CHECK(i + 1 > n, "mask_short",
  15                                  "case #%d: mask too short, got n=%d, need at least %d\n",
  16                                  case_nr, n, i + 1))
  17                                return;
  18                        CHECK(!mask[i], "cpu_not_set",
  19                              "case #%d: mask differs, expected cpu#%d SET\n",
  20                              case_nr, i);
  21                } else {
  22                        CHECK(i < n && mask[i], "cpu_set",
  23                              "case #%d: mask differs, expected cpu#%d UNSET\n",
  24                              case_nr, i);
  25                }
  26        }
  27        CHECK(i < n, "mask_long",
  28              "case #%d: mask too long, got n=%d, expected at most %d\n",
  29              case_nr, n, i);
  30}
  31
  32static struct {
  33        const char *cpu_mask;
  34        const char *expect;
  35        bool fails;
  36} test_cases[] = {
  37        { "0\n", "1", false },
  38        { "0,2\n", "101", false },
  39        { "0-2\n", "111", false },
  40        { "0-2,3-4\n", "11111", false },
  41        { "0", "1", false },
  42        { "0-2", "111", false },
  43        { "0,2", "101", false },
  44        { "0,1-3", "1111", false },
  45        { "0,1,2,3", "1111", false },
  46        { "0,2-3,5", "101101", false },
  47        { "3-3", "0001", false },
  48        { "2-4,6,9-10", "00111010011", false },
  49        /* failure cases */
  50        { "", "", true },
  51        { "0-", "", true },
  52        { "0 ", "", true },
  53        { "0_1", "", true },
  54        { "1-0", "", true },
  55        { "-1", "", true },
  56};
  57
  58void test_cpu_mask()
  59{
  60        int i, err, n;
  61        bool *mask;
  62
  63        for (i = 0; i < ARRAY_SIZE(test_cases); i++) {
  64                mask = NULL;
  65                err = parse_cpu_mask_str(test_cases[i].cpu_mask, &mask, &n);
  66                if (test_cases[i].fails) {
  67                        CHECK(!err, "should_fail",
  68                              "case #%d: parsing should fail!\n", i + 1);
  69                } else {
  70                        if (CHECK(err, "parse_err",
  71                                  "case #%d: cpu mask parsing failed: %d\n",
  72                                  i + 1, err))
  73                                continue;
  74                        validate_mask(i + 1, test_cases[i].expect, mask, n);
  75                }
  76                free(mask);
  77        }
  78}
  79