1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
4 * Copyright (c) 2024 David Vernet <dvernet@meta.com>
5 * Copyright (c) 2024 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 "ddsp_bogus_dsq_fail.bpf.skel.h"
12 #include "scx_test.h"
13
14 static enum scx_test_status setup(void **ctx)
15 {
16 struct ddsp_bogus_dsq_fail *skel;
17
18 skel = ddsp_bogus_dsq_fail__open_and_load();
19 SCX_FAIL_IF(!skel, "Failed to open and load skel");
20 *ctx = skel;
21
22 return SCX_TEST_PASS;
23 }
24
25 static enum scx_test_status run(void *ctx)
26 {
27 struct ddsp_bogus_dsq_fail *skel = ctx;
28 struct bpf_link *link;
29
30 link = bpf_map__attach_struct_ops(skel->maps.ddsp_bogus_dsq_fail_ops);
31 SCX_FAIL_IF(!link, "Failed to attach struct_ops");
32
33 sleep(1);
34
35 SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_ERROR));
36 bpf_link__destroy(link);
37
38 return SCX_TEST_PASS;
39 }
40
41 static void cleanup(void *ctx)
42 {
43 struct ddsp_bogus_dsq_fail *skel = ctx;
44
45 ddsp_bogus_dsq_fail__destroy(skel);
46 }
47
48 struct scx_test ddsp_bogus_dsq_fail = {
49 .name = "ddsp_bogus_dsq_fail",
50 .description = "Verify we gracefully fail, and fall back to using a "
51 "built-in DSQ, if we do a direct dispatch to an invalid"
52 " DSQ in ops.select_cpu()",
53 .setup = setup,
54 .run = run,
55 .cleanup = cleanup,
56 };
57 REGISTER_SCX_TEST(&ddsp_bogus_dsq_fail)
58
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