tools/testing/selftests/sched_ext/enq_last_no_enq_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 <dvernet@meta.com>
   5  * Copyright (c) 2023 Tejun Heo <tj@kernel.org>
   6  */
   7 #include <bpf/bpf.h>
   8 #include <scx/common.h>
   9 #include <sys/wait.h>
  10 #include <unistd.h>
  11 #include "enq_last_no_enq_fails.bpf.skel.h"
  12 #include "scx_test.h"
  13
  14 static enum scx_test_status setup(void **ctx)
  15 {
  16         struct enq_last_no_enq_fails *skel;
  17
  18         skel = enq_last_no_enq_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_last_no_enq_fails *skel = ctx;
  31         struct bpf_link *link;
  32
  33         link = bpf_map__attach_struct_ops(skel->maps.enq_last_no_enq_fails_ops);
  34         if (!link) {
  35                 SCX_ERR("Incorrectly failed at attaching scheduler");
  36                 return SCX_TEST_FAIL;
  37         }
  38         if (!skel->bss->exit_kind) {
  39                 SCX_ERR("Incorrectly stayed loaded");
  40                 return SCX_TEST_FAIL;
  41         }
  42
  43         bpf_link__destroy(link);
  44
  45         return SCX_TEST_PASS;
  46 }
  47
  48 static void cleanup(void *ctx)
  49 {
  50         struct enq_last_no_enq_fails *skel = ctx;
  51
  52         enq_last_no_enq_fails__destroy(skel);
  53 }
  54
  55 struct scx_test enq_last_no_enq_fails = {
  56         .name = "enq_last_no_enq_fails",
  57         .description = "Verify we eject a scheduler if we specify "
  58                        "the SCX_OPS_ENQ_LAST flag without defining "
  59                        "ops.enqueue()",
  60         .setup = setup,
  61         .run = run,
  62         .cleanup = cleanup,
  63 };
  64 REGISTER_SCX_TEST(&enq_last_no_enq_fails)