tools/testing/selftests/bpf/prog_tests/map_lookup_percpu_elem.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2022 Bytedance */
   3
   4 #include <test_progs.h>
   5 #include "test_map_lookup_percpu_elem.skel.h"
   6
   7 void test_map_lookup_percpu_elem(void)
   8 {
   9         struct test_map_lookup_percpu_elem *skel;
  10         __u64 key = 0, sum;
  11         int ret, i, nr_cpus = libbpf_num_possible_cpus();
  12         __u64 *buf;
  13
  14         buf = malloc(nr_cpus*sizeof(__u64));
  15         if (!ASSERT_OK_PTR(buf, "malloc"))
  16                 return;
  17
  18         for (i = 0; i < nr_cpus; i++)
  19                 buf[i] = i;
  20         sum = (nr_cpus - 1) * nr_cpus / 2;
  21
  22         skel = test_map_lookup_percpu_elem__open();
  23         if (!ASSERT_OK_PTR(skel, "test_map_lookup_percpu_elem__open"))
  24                 goto exit;
  25
  26         skel->rodata->my_pid = getpid();
  27         skel->rodata->nr_cpus = nr_cpus;
  28
  29         ret = test_map_lookup_percpu_elem__load(skel);
  30         if (!ASSERT_OK(ret, "test_map_lookup_percpu_elem__load"))
  31                 goto cleanup;
  32
  33         ret = test_map_lookup_percpu_elem__attach(skel);
  34         if (!ASSERT_OK(ret, "test_map_lookup_percpu_elem__attach"))
  35                 goto cleanup;
  36
  37         ret = bpf_map_update_elem(bpf_map__fd(skel->maps.percpu_array_map), &key, buf, 0);
  38         ASSERT_OK(ret, "percpu_array_map update");
  39
  40         ret = bpf_map_update_elem(bpf_map__fd(skel->maps.percpu_hash_map), &key, buf, 0);
  41         ASSERT_OK(ret, "percpu_hash_map update");
  42
  43         ret = bpf_map_update_elem(bpf_map__fd(skel->maps.percpu_lru_hash_map), &key, buf, 0);
  44         ASSERT_OK(ret, "percpu_lru_hash_map update");
  45
  46         syscall(__NR_getuid);
  47
  48         test_map_lookup_percpu_elem__detach(skel);
  49
  50         ASSERT_EQ(skel->bss->percpu_array_elem_sum, sum, "percpu_array lookup percpu elem");
  51         ASSERT_EQ(skel->bss->percpu_hash_elem_sum, sum, "percpu_hash lookup percpu elem");
  52         ASSERT_EQ(skel->bss->percpu_lru_hash_elem_sum, sum, "percpu_lru_hash lookup percpu elem");
  53
  54 cleanup:
  55         test_map_lookup_percpu_elem__destroy(skel);
  56 exit:
  57         free(buf);
  58 }