1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2019 Facebook */
 3#include <test_progs.h>
 4#include "bpf_util.h"
 5
 6void serial_test_fexit_stress(void)
 7{
 8	int bpf_max_tramp_links, err, i;
 9	int *fd, *fexit_fd, *link_fd;
10
11	bpf_max_tramp_links = get_bpf_max_tramp_links();
12	if (!ASSERT_GE(bpf_max_tramp_links, 1, "bpf_max_tramp_links"))
13		return;
14	fd = calloc(bpf_max_tramp_links * 2, sizeof(*fd));
15	if (!ASSERT_OK_PTR(fd, "fd"))
16		return;
17	fexit_fd = fd;
18	link_fd = fd + bpf_max_tramp_links;
 
19
20	const struct bpf_insn trace_program[] = {
21		BPF_MOV64_IMM(BPF_REG_0, 0),
22		BPF_EXIT_INSN(),
23	};
24
25	LIBBPF_OPTS(bpf_prog_load_opts, trace_opts,
 
 
 
 
26		.expected_attach_type = BPF_TRACE_FEXIT,
27	);
28
29	LIBBPF_OPTS(bpf_test_run_opts, topts);
 
 
 
 
 
 
 
 
 
 
30
31	err = libbpf_find_vmlinux_btf_id("bpf_fentry_test1",
32					 trace_opts.expected_attach_type);
33	if (!ASSERT_GT(err, 0, "find_vmlinux_btf_id"))
34		goto out;
35	trace_opts.attach_btf_id = err;
36
37	for (i = 0; i < bpf_max_tramp_links; i++) {
38		fexit_fd[i] = bpf_prog_load(BPF_PROG_TYPE_TRACING, NULL, "GPL",
39					    trace_program,
40					    ARRAY_SIZE(trace_program),
41					    &trace_opts);
42		if (!ASSERT_GE(fexit_fd[i], 0, "fexit load"))
43			goto out;
44		link_fd[i] = bpf_link_create(fexit_fd[i], 0, BPF_TRACE_FEXIT, NULL);
45		if (!ASSERT_GE(link_fd[i], 0, "fexit attach"))
 
46			goto out;
47	}
48
49	err = bpf_prog_test_run_opts(fexit_fd[0], &topts);
50	ASSERT_OK(err, "bpf_prog_test_run_opts");
 
 
51
 
 
 
 
52out:
53	for (i = 0; i < bpf_max_tramp_links; i++) {
54		if (link_fd[i] > 0)
55			close(link_fd[i]);
56		if (fexit_fd[i] > 0)
57			close(fexit_fd[i]);
58	}
59	free(fd);
60}

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2019 Facebook */
 3#include <test_progs.h>
 
 4
 5/* x86-64 fits 55 JITed and 43 interpreted progs into half page */
 6#define CNT 40
 
 
 7
 8void test_fexit_stress(void)
 9{
10	char test_skb[128] = {};
11	int fexit_fd[CNT] = {};
12	int link_fd[CNT] = {};
13	__u32 duration = 0;
14	char error[4096];
15	__u32 prog_ret;
16	int err, i, filter_fd;
17
18	const struct bpf_insn trace_program[] = {
19		BPF_MOV64_IMM(BPF_REG_0, 0),
20		BPF_EXIT_INSN(),
21	};
22
23	struct bpf_load_program_attr load_attr = {
24		.prog_type = BPF_PROG_TYPE_TRACING,
25		.license = "GPL",
26		.insns = trace_program,
27		.insns_cnt = sizeof(trace_program) / sizeof(struct bpf_insn),
28		.expected_attach_type = BPF_TRACE_FEXIT,
29	};
30
31	const struct bpf_insn skb_program[] = {
32		BPF_MOV64_IMM(BPF_REG_0, 0),
33		BPF_EXIT_INSN(),
34	};
35
36	struct bpf_load_program_attr skb_load_attr = {
37		.prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
38		.license = "GPL",
39		.insns = skb_program,
40		.insns_cnt = sizeof(skb_program) / sizeof(struct bpf_insn),
41	};
42
43	err = libbpf_find_vmlinux_btf_id("bpf_fentry_test1",
44					 load_attr.expected_attach_type);
45	if (CHECK(err <= 0, "find_vmlinux_btf_id", "failed: %d\n", err))
46		goto out;
47	load_attr.attach_btf_id = err;
48
49	for (i = 0; i < CNT; i++) {
50		fexit_fd[i] = bpf_load_program_xattr(&load_attr, error, sizeof(error));
51		if (CHECK(fexit_fd[i] < 0, "fexit loaded",
52			  "failed: %d errno %d\n", fexit_fd[i], errno))
 
 
53			goto out;
54		link_fd[i] = bpf_raw_tracepoint_open(NULL, fexit_fd[i]);
55		if (CHECK(link_fd[i] < 0, "fexit attach failed",
56			  "prog %d failed: %d err %d\n", i, link_fd[i], errno))
57			goto out;
58	}
59
60	filter_fd = bpf_load_program_xattr(&skb_load_attr, error, sizeof(error));
61	if (CHECK(filter_fd < 0, "test_program_loaded", "failed: %d errno %d\n",
62		  filter_fd, errno))
63		goto out;
64
65	err = bpf_prog_test_run(filter_fd, 1, test_skb, sizeof(test_skb), 0,
66				0, &prog_ret, 0);
67	close(filter_fd);
68	CHECK_FAIL(err);
69out:
70	for (i = 0; i < CNT; i++) {
71		if (link_fd[i])
72			close(link_fd[i]);
73		if (fexit_fd[i])
74			close(fexit_fd[i]);
75	}
 
76}