tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
14static 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
28static enum scx_test_status run(void *ctx)
29{
30 struct prog_run *skel = ctx;
31 struct bpf_link *link;
32 int prog_fd, err = 0;
33
34 prog_fd = bpf_program__fd(skel->progs.prog_run_syscall);
35 if (prog_fd < 0) {
36 SCX_ERR("Failed to get BPF_PROG_RUN prog");
37 return SCX_TEST_FAIL;
38 }
39
40 LIBBPF_OPTS(bpf_test_run_opts, topts);
41
42 link = bpf_map__attach_struct_ops(skel->maps.prog_run_ops);
43 if (!link) {
44 SCX_ERR("Failed to attach scheduler");
45 close(prog_fd);
46 return SCX_TEST_FAIL;
47 }
48
49 err = bpf_prog_test_run_opts(prog_fd, &topts);
50 SCX_EQ(err, 0);
51
52 /* Assumes uei.kind is written last */
53 while (skel->data->uei.kind == EXIT_KIND(SCX_EXIT_NONE))
54 sched_yield();
55
56 SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_UNREG_BPF));
57 SCX_EQ(skel->data->uei.exit_code, 0xdeadbeef);
58 close(prog_fd);
59 bpf_link__destroy(link);
60
61 return SCX_TEST_PASS;
62}
63
64static void cleanup(void *ctx)
65{
66 struct prog_run *skel = ctx;
67
68 prog_run__destroy(skel);
69}
70
71struct scx_test prog_run = {
72 .name = "prog_run",
73 .description = "Verify we can call into a scheduler with BPF_PROG_RUN, and invoke kfuncs",
74 .setup = setup,
75 .run = run,
76 .cleanup = cleanup,
77};
78REGISTER_SCX_TEST(&prog_run)