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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <test_progs.h>
   3 #include "percpu_alloc_array.skel.h"
   4 #include "percpu_alloc_cgrp_local_storage.skel.h"
   5 #include "percpu_alloc_fail.skel.h"
   6
   7 static void test_array(void)
   8 {
   9         struct percpu_alloc_array *skel;
  10         int err, prog_fd;
  11         LIBBPF_OPTS(bpf_test_run_opts, topts);
  12
  13         skel = percpu_alloc_array__open();
  14         if (!ASSERT_OK_PTR(skel, "percpu_alloc_array__open"))
  15                 return;
  16
  17         bpf_program__set_autoload(skel->progs.test_array_map_1, true);
  18         bpf_program__set_autoload(skel->progs.test_array_map_2, true);
  19         bpf_program__set_autoload(skel->progs.test_array_map_3, true);
  20         bpf_program__set_autoload(skel->progs.test_array_map_4, true);
  21
  22         skel->bss->my_pid = getpid();
  23         skel->rodata->nr_cpus = libbpf_num_possible_cpus();
  24
  25         err = percpu_alloc_array__load(skel);
  26         if (!ASSERT_OK(err, "percpu_alloc_array__load"))
  27                 goto out;
  28
  29         err = percpu_alloc_array__attach(skel);
  30         if (!ASSERT_OK(err, "percpu_alloc_array__attach"))
  31                 goto out;
  32
  33         prog_fd = bpf_program__fd(skel->progs.test_array_map_1);
  34         err = bpf_prog_test_run_opts(prog_fd, &topts);
  35         ASSERT_OK(err, "test_run array_map 1-4");
  36         ASSERT_EQ(topts.retval, 0, "test_run array_map 1-4");
  37         ASSERT_EQ(skel->bss->cpu0_field_d, 2, "cpu0_field_d");
  38         ASSERT_EQ(skel->bss->sum_field_c, 1, "sum_field_c");
  39 out:
  40         percpu_alloc_array__destroy(skel);
  41 }
  42
  43 static void test_array_sleepable(void)
  44 {
  45         struct percpu_alloc_array *skel;
  46         int err, prog_fd;
  47         LIBBPF_OPTS(bpf_test_run_opts, topts);
  48
  49         skel = percpu_alloc_array__open();
  50         if (!ASSERT_OK_PTR(skel, "percpu_alloc__open"))
  51                 return;
  52
  53         bpf_program__set_autoload(skel->progs.test_array_map_10, true);
  54
  55         skel->bss->my_pid = getpid();
  56         skel->rodata->nr_cpus = libbpf_num_possible_cpus();
  57
  58         err = percpu_alloc_array__load(skel);
  59         if (!ASSERT_OK(err, "percpu_alloc_array__load"))
  60                 goto out;
  61
  62         err = percpu_alloc_array__attach(skel);
  63         if (!ASSERT_OK(err, "percpu_alloc_array__attach"))
  64                 goto out;
  65
  66         prog_fd = bpf_program__fd(skel->progs.test_array_map_10);
  67         err = bpf_prog_test_run_opts(prog_fd, &topts);
  68         ASSERT_OK(err, "test_run array_map_10");
  69         ASSERT_EQ(topts.retval, 0, "test_run array_map_10");
  70         ASSERT_EQ(skel->bss->cpu0_field_d, 2, "cpu0_field_d");
  71         ASSERT_EQ(skel->bss->sum_field_c, 1, "sum_field_c");
  72 out:
  73         percpu_alloc_array__destroy(skel);
  74 }
  75
  76 static void test_cgrp_local_storage(void)
  77 {
  78         struct percpu_alloc_cgrp_local_storage *skel;
  79         int err, cgroup_fd, prog_fd;
  80         LIBBPF_OPTS(bpf_test_run_opts, topts);
  81
  82         cgroup_fd = test__join_cgroup("/percpu_alloc");
  83         if (!ASSERT_GE(cgroup_fd, 0, "join_cgroup /percpu_alloc"))
  84                 return;
  85
  86         skel = percpu_alloc_cgrp_local_storage__open();
  87         if (!ASSERT_OK_PTR(skel, "percpu_alloc_cgrp_local_storage__open"))
  88                 goto close_fd;
  89
  90         skel->bss->my_pid = getpid();
  91         skel->rodata->nr_cpus = libbpf_num_possible_cpus();
  92
  93         err = percpu_alloc_cgrp_local_storage__load(skel);
  94         if (!ASSERT_OK(err, "percpu_alloc_cgrp_local_storage__load"))
  95                 goto destroy_skel;
  96
  97         err = percpu_alloc_cgrp_local_storage__attach(skel);
  98         if (!ASSERT_OK(err, "percpu_alloc_cgrp_local_storage__attach"))
  99                 goto destroy_skel;
 100
 101         prog_fd = bpf_program__fd(skel->progs.test_cgrp_local_storage_1);
 102         err = bpf_prog_test_run_opts(prog_fd, &topts);
 103         ASSERT_OK(err, "test_run cgrp_local_storage 1-3");
 104         ASSERT_EQ(topts.retval, 0, "test_run cgrp_local_storage 1-3");
 105         ASSERT_EQ(skel->bss->cpu0_field_d, 2, "cpu0_field_d");
 106         ASSERT_EQ(skel->bss->sum_field_c, 1, "sum_field_c");
 107
 108 destroy_skel:
 109         percpu_alloc_cgrp_local_storage__destroy(skel);
 110 close_fd:
 111         close(cgroup_fd);
 112 }
 113
 114 static void test_failure(void) {
 115         RUN_TESTS(percpu_alloc_fail);
 116 }
 117
 118 void test_percpu_alloc(void)
 119 {
 120         if (test__start_subtest("array"))
 121                 test_array();
 122         if (test__start_subtest("array_sleepable"))
 123                 test_array_sleepable();
 124         if (test__start_subtest("cgrp_local_storage"))
 125                 test_cgrp_local_storage();
 126         if (test__start_subtest("failure_tests"))
 127                 test_failure();
 128 }