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/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
3#include <test_progs.h>
4#include "cgroup_helpers.h"
5#include "cgroup_preorder.skel.h"
6
7static int run_getsockopt_test(int cg_parent, int sock_fd, bool has_relative_fd)
8{
9 LIBBPF_OPTS(bpf_prog_attach_opts, opts);
10 enum bpf_attach_type prog_p_atype, prog_p2_atype;
11 int prog_p_fd, prog_p2_fd;
12 struct cgroup_preorder *skel = NULL;
13 struct bpf_program *prog;
14 __u8 *result, buf;
15 socklen_t optlen = 1;
16 int err = 0;
17
18 skel = cgroup_preorder__open_and_load();
19 if (!ASSERT_OK_PTR(skel, "cgroup_preorder__open_and_load"))
20 return 0;
21
22 LIBBPF_OPTS_RESET(opts);
23 opts.flags = BPF_F_ALLOW_MULTI;
24 prog = skel->progs.parent;
25 prog_p_fd = bpf_program__fd(prog);
26 prog_p_atype = bpf_program__expected_attach_type(prog);
27 err = bpf_prog_attach_opts(prog_p_fd, cg_parent, prog_p_atype, &opts);
28 if (!ASSERT_OK(err, "bpf_prog_attach_opts-parent"))
29 goto close_skel;
30
31 opts.flags = BPF_F_ALLOW_MULTI | BPF_F_BEFORE;
32 if (has_relative_fd)
33 opts.relative_fd = prog_p_fd;
34 prog = skel->progs.parent_2;
35 prog_p2_fd = bpf_program__fd(prog);
36 prog_p2_atype = bpf_program__expected_attach_type(prog);
37 err = bpf_prog_attach_opts(prog_p2_fd, cg_parent, prog_p2_atype, &opts);
38 if (!ASSERT_OK(err, "bpf_prog_attach_opts-parent_2"))
39 goto detach_parent;
40
41 err = getsockopt(sock_fd, SOL_IP, IP_TOS, &buf, &optlen);
42 if (!ASSERT_OK(err, "getsockopt"))
43 goto detach_parent_2;
44
45 result = skel->bss->result;
46 ASSERT_TRUE(result[0] == 4 && result[1] == 3, "result values");
47
48detach_parent_2:
49 ASSERT_OK(bpf_prog_detach2(prog_p2_fd, cg_parent, prog_p2_atype),
50 "bpf_prog_detach2-parent_2");
51detach_parent:
52 ASSERT_OK(bpf_prog_detach2(prog_p_fd, cg_parent, prog_p_atype),
53 "bpf_prog_detach2-parent");
54close_skel:
55 cgroup_preorder__destroy(skel);
56 return err;
57}
58
59void test_cgroup_mprog_ordering(void)
60{
61 int cg_parent = -1, sock_fd = -1;
62
63 cg_parent = test__join_cgroup("/parent");
64 if (!ASSERT_GE(cg_parent, 0, "join_cgroup /parent"))
65 goto out;
66
67 sock_fd = socket(AF_INET, SOCK_STREAM, 0);
68 if (!ASSERT_GE(sock_fd, 0, "socket"))
69 goto out;
70
71 ASSERT_OK(run_getsockopt_test(cg_parent, sock_fd, false), "getsockopt_test_1");
72 ASSERT_OK(run_getsockopt_test(cg_parent, sock_fd, true), "getsockopt_test_2");
73
74out:
75 close(sock_fd);
76 close(cg_parent);
77}