1 // SPDX-License-Identifier: GPL-2.0
2 #include <test_progs.h>
4 void test_skb_ctx(void)
6 struct __sk_buff skb = {
18 struct bpf_prog_test_run_attr tattr = {
20 .data_size_in = sizeof(pkt_v4),
22 .ctx_size_in = sizeof(skb),
24 .ctx_size_out = sizeof(skb),
26 struct bpf_object *obj;
30 err = bpf_prog_load("./test_skb_ctx.o", BPF_PROG_TYPE_SCHED_CLS, &obj,
32 if (CHECK_ATTR(err, "load", "err %d errno %d\n", err, errno))
35 /* ctx_in != NULL, ctx_size_in == 0 */
37 tattr.ctx_size_in = 0;
38 err = bpf_prog_test_run_xattr(&tattr);
39 CHECK_ATTR(err == 0, "ctx_size_in", "err %d errno %d\n", err, errno);
40 tattr.ctx_size_in = sizeof(skb);
42 /* ctx_out != NULL, ctx_size_out == 0 */
44 tattr.ctx_size_out = 0;
45 err = bpf_prog_test_run_xattr(&tattr);
46 CHECK_ATTR(err == 0, "ctx_size_out", "err %d errno %d\n", err, errno);
47 tattr.ctx_size_out = sizeof(skb);
49 /* non-zero [len, tc_index] fields should be rejected*/
52 err = bpf_prog_test_run_xattr(&tattr);
53 CHECK_ATTR(err == 0, "len", "err %d errno %d\n", err, errno);
57 err = bpf_prog_test_run_xattr(&tattr);
58 CHECK_ATTR(err == 0, "tc_index", "err %d errno %d\n", err, errno);
61 /* non-zero [hash, sk] fields should be rejected */
64 err = bpf_prog_test_run_xattr(&tattr);
65 CHECK_ATTR(err == 0, "hash", "err %d errno %d\n", err, errno);
68 skb.sk = (struct bpf_sock *)1;
69 err = bpf_prog_test_run_xattr(&tattr);
70 CHECK_ATTR(err == 0, "sk", "err %d errno %d\n", err, errno);
73 err = bpf_prog_test_run_xattr(&tattr);
74 CHECK_ATTR(err != 0 || tattr.retval,
76 "err %d errno %d retval %d\n",
77 err, errno, tattr.retval);
79 CHECK_ATTR(tattr.ctx_size_out != sizeof(skb),
81 "incorrect output size, want %lu have %u\n",
82 sizeof(skb), tattr.ctx_size_out);
84 for (i = 0; i < 5; i++)
85 CHECK_ATTR(skb.cb[i] != i + 2,
87 "skb->cb[i] == %d, expected %d\n",
89 CHECK_ATTR(skb.priority != 7,
91 "skb->priority == %d, expected %d\n",
93 CHECK_ATTR(skb.tstamp != 8,
95 "skb->tstamp == %lld, expected %d\n",
97 CHECK_ATTR(skb.mark != 10,
99 "skb->mark == %u, expected %d\n",