tools/testing/selftests/sched_ext/enq_select_cpu_fails.c

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (c) 2023 Meta Platforms, Inc. and affiliates.
   4  * Copyright (c) 2023 David Vernet <[email protected]>
   5  * Copyright (c) 2023 Tejun Heo <[email protected]>
   6  */
   7 #include <bpf/bpf.h>
   8 #include <scx/common.h>
   9 #include <sys/wait.h>
  10 #include <unistd.h>
  11 #include "enq_select_cpu_fails.bpf.skel.h"
  12 #include "scx_test.h"
  13
  14 static enum scx_test_status setup(void **ctx)
  15 {
  16         struct enq_select_cpu_fails *skel;
  17
  18         skel = enq_select_cpu_fails__open_and_load();
  19         if (!skel) {
  20                 SCX_ERR("Failed to open and load skel");
  21                 return SCX_TEST_FAIL;
  22         }
  23         *ctx = skel;
  24
  25         return SCX_TEST_PASS;
  26 }
  27
  28 static enum scx_test_status run(void *ctx)
  29 {
  30         struct enq_select_cpu_fails *skel = ctx;
  31         struct bpf_link *link;
  32
  33         link = bpf_map__attach_struct_ops(skel->maps.enq_select_cpu_fails_ops);
  34         if (!link) {
  35                 SCX_ERR("Failed to attach scheduler");
  36                 return SCX_TEST_FAIL;
  37         }
  38
  39         sleep(1);
  40
  41         bpf_link__destroy(link);
  42
  43         return SCX_TEST_PASS;
  44 }
  45
  46 static void cleanup(void *ctx)
  47 {
  48         struct enq_select_cpu_fails *skel = ctx;
  49
  50         enq_select_cpu_fails__destroy(skel);
  51 }
  52
  53 struct scx_test enq_select_cpu_fails = {
  54         .name = "enq_select_cpu_fails",
  55         .description = "Verify we fail to call scx_bpf_select_cpu_dfl() "
  56                        "from ops.enqueue()",
  57         .setup = setup,
  58         .run = run,
  59         .cleanup = cleanup,
  60 };
  61 REGISTER_SCX_TEST(&enq_select_cpu_fails)