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 */
6 #include <bpf/bpf.h>
7 #include <sched.h>
8 #include <scx/common.h>
9 #include <sys/wait.h>
10 #include <unistd.h>
11 #include "prog_run.bpf.skel.h"
12 #include "scx_test.h"
13
setup(void ** ctx)14 static enum scx_test_status setup(void **ctx)
15 {
16 struct prog_run *skel;
17
18 skel = prog_run__open();
19 SCX_FAIL_IF(!skel, "Failed to open");
20 SCX_ENUM_INIT(skel);
21 SCX_FAIL_IF(prog_run__load(skel), "Failed to load skel");
22
23 *ctx = skel;
24
25 return SCX_TEST_PASS;
26 }
27
run(void * ctx)28 static enum scx_test_status run(void *ctx)
29 {
30 struct prog_run *skel = ctx;
31 struct bpf_link *link = NULL;
32 enum scx_test_status status = SCX_TEST_PASS;
33 int prog_fd, err = 0;
34
35 prog_fd = bpf_program__fd(skel->progs.prog_run_syscall);
36 if (prog_fd < 0) {
37 SCX_ERR("Failed to get BPF_PROG_RUN prog");
38 return SCX_TEST_FAIL;
39 }
40
41 LIBBPF_OPTS(bpf_test_run_opts, topts);
42
43 link = bpf_map__attach_struct_ops(skel->maps.prog_run_ops);
44 if (!link) {
45 SCX_ERR("Failed to attach scheduler");
46 status = SCX_TEST_FAIL;
47 goto out;
48 }
49
50 err = bpf_prog_test_run_opts(prog_fd, &topts);
51 if (err) {
52 SCX_ERR("BPF_PROG_RUN failed (%d)", err);
53 status = SCX_TEST_FAIL;
54 goto out;
55 }
56
57 /* Assumes uei.kind is written last */
58 while (skel->data->uei.kind == EXIT_KIND(SCX_EXIT_NONE))
59 sched_yield();
60
61 if (skel->data->uei.kind != EXIT_KIND(SCX_EXIT_UNREG_BPF)) {
62 SCX_ERR("Unexpected exit kind: %llu",
63 (unsigned long long)skel->data->uei.kind);
64 status = SCX_TEST_FAIL;
65 goto out;
66 }
67 if (skel->data->uei.exit_code != 0xdeadbeef) {
68 SCX_ERR("Unexpected exit code: %lld",
69 (long long)skel->data->uei.exit_code);
70 status = SCX_TEST_FAIL;
71 goto out;
72 }
73
74 out:
75 close(prog_fd);
76 if (link)
77 bpf_link__destroy(link);
78
79 return status;
80 }
81
cleanup(void * ctx)82 static void cleanup(void *ctx)
83 {
84 struct prog_run *skel = ctx;
85
86 prog_run__destroy(skel);
87 }
88
89 struct scx_test prog_run = {
90 .name = "prog_run",
91 .description = "Verify we can call into a scheduler with BPF_PROG_RUN, and invoke kfuncs",
92 .setup = setup,
93 .run = run,
94 .cleanup = cleanup,
95 };
96 REGISTER_SCX_TEST(&prog_run)
97