1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2019 Facebook
3 #include <test_progs.h>
4 static int libbpf_debug_print(enum libbpf_print_level level,
5 			      const char *format, va_list args)
6 {
7 	if (level != LIBBPF_DEBUG) {
8 		vprintf(format, args);
9 		return 0;
10 	}
11 
12 	if (!strstr(format, "verifier log"))
13 		return 0;
14 	vprintf("%s", args);
15 	return 0;
16 }
17 
18 static int check_load(const char *file, enum bpf_prog_type type)
19 {
20 	struct bpf_prog_load_attr attr;
21 	struct bpf_object *obj = NULL;
22 	int err, prog_fd;
23 
24 	memset(&attr, 0, sizeof(struct bpf_prog_load_attr));
25 	attr.file = file;
26 	attr.prog_type = type;
27 	attr.log_level = 4;
28 	attr.prog_flags = BPF_F_TEST_RND_HI32;
29 	err = bpf_prog_load_xattr(&attr, &obj, &prog_fd);
30 	bpf_object__close(obj);
31 	return err;
32 }
33 
34 struct scale_test_def {
35 	const char *file;
36 	enum bpf_prog_type attach_type;
37 	bool fails;
38 };
39 
40 void test_bpf_verif_scale(void)
41 {
42 	struct scale_test_def tests[] = {
43 		{ "loop3.o", BPF_PROG_TYPE_RAW_TRACEPOINT, true /* fails */ },
44 
45 		{ "test_verif_scale1.o", BPF_PROG_TYPE_SCHED_CLS },
46 		{ "test_verif_scale2.o", BPF_PROG_TYPE_SCHED_CLS },
47 		{ "test_verif_scale3.o", BPF_PROG_TYPE_SCHED_CLS },
48 
49 		/* full unroll by llvm */
50 		{ "pyperf50.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
51 		{ "pyperf100.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
52 		{ "pyperf180.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
53 
54 		/* partial unroll. llvm will unroll loop ~150 times.
55 		 * C loop count -> 600.
56 		 * Asm loop count -> 4.
57 		 * 16k insns in loop body.
58 		 * Total of 5 such loops. Total program size ~82k insns.
59 		 */
60 		{ "pyperf600.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
61 
62 		/* no unroll at all.
63 		 * C loop count -> 600.
64 		 * ASM loop count -> 600.
65 		 * ~110 insns in loop body.
66 		 * Total of 5 such loops. Total program size ~1500 insns.
67 		 */
68 		{ "pyperf600_nounroll.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
69 
70 		{ "loop1.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
71 		{ "loop2.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
72 		{ "loop4.o", BPF_PROG_TYPE_SCHED_CLS },
73 		{ "loop5.o", BPF_PROG_TYPE_SCHED_CLS },
74 
75 		/* partial unroll. 19k insn in a loop.
76 		 * Total program size 20.8k insn.
77 		 * ~350k processed_insns
78 		 */
79 		{ "strobemeta.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
80 
81 		/* no unroll, tiny loops */
82 		{ "strobemeta_nounroll1.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
83 		{ "strobemeta_nounroll2.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
84 
85 		{ "test_sysctl_loop1.o", BPF_PROG_TYPE_CGROUP_SYSCTL },
86 		{ "test_sysctl_loop2.o", BPF_PROG_TYPE_CGROUP_SYSCTL },
87 
88 		{ "test_xdp_loop.o", BPF_PROG_TYPE_XDP },
89 		{ "test_seg6_loop.o", BPF_PROG_TYPE_LWT_SEG6LOCAL },
90 	};
91 	libbpf_print_fn_t old_print_fn = NULL;
92 	int err, i;
93 
94 	if (env.verifier_stats) {
95 		test__force_log();
96 		old_print_fn = libbpf_set_print(libbpf_debug_print);
97 	}
98 
99 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
100 		const struct scale_test_def *test = &tests[i];
101 
102 		if (!test__start_subtest(test->file))
103 			continue;
104 
105 		err = check_load(test->file, test->attach_type);
106 		CHECK_FAIL(err && !test->fails);
107 	}
108 
109 	if (env.verifier_stats)
110 		libbpf_set_print(old_print_fn);
111 }
112