1 // SPDX-License-Identifier: GPL-2.0
2 #include <test_progs.h>
3 #include <linux/btf.h>
4 #include "netif_receive_skb.skel.h"
5 
6 /* Demonstrate that bpf_snprintf_btf succeeds and that various data types
7  * are formatted correctly.
8  */
9 void test_snprintf_btf(void)
10 {
11 	struct netif_receive_skb *skel;
12 	struct netif_receive_skb__bss *bss;
13 	int err, duration = 0;
14 
15 	skel = netif_receive_skb__open();
16 	if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
17 		return;
18 
19 	err = netif_receive_skb__load(skel);
20 	if (CHECK(err, "skel_load", "failed to load skeleton: %d\n", err))
21 		goto cleanup;
22 
23 	bss = skel->bss;
24 
25 	err = netif_receive_skb__attach(skel);
26 	if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
27 		goto cleanup;
28 
29 	/* generate receive event */
30 	err = system("ping -c 1 127.0.0.1 > /dev/null");
31 	if (CHECK(err, "system", "ping failed: %d\n", err))
32 		goto cleanup;
33 
34 	if (bss->skip) {
35 		printf("%s:SKIP:no __builtin_btf_type_id\n", __func__);
36 		test__skip();
37 		goto cleanup;
38 	}
39 
40 	/*
41 	 * Make sure netif_receive_skb program was triggered
42 	 * and it set expected return values from bpf_trace_printk()s
43 	 * and all tests ran.
44 	 */
45 	if (!ASSERT_GT(bss->ret, 0, "bpf_snprintf_ret"))
46 		goto cleanup;
47 
48 	if (CHECK(bss->ran_subtests == 0, "check if subtests ran",
49 		  "no subtests ran, did BPF program run?"))
50 		goto cleanup;
51 
52 	if (CHECK(bss->num_subtests != bss->ran_subtests,
53 		  "check all subtests ran",
54 		  "only ran %d of %d tests\n", bss->num_subtests,
55 		  bss->ran_subtests))
56 		goto cleanup;
57 
58 cleanup:
59 	netif_receive_skb__destroy(skel);
60 }
61