1 // SPDX-License-Identifier: GPL-2.0 2 #include <test_progs.h> 3 #include <network_helpers.h> 4 5 void test_skb_ctx(void) 6 { 7 struct __sk_buff skb = { 8 .cb[0] = 1, 9 .cb[1] = 2, 10 .cb[2] = 3, 11 .cb[3] = 4, 12 .cb[4] = 5, 13 .priority = 6, 14 .ingress_ifindex = 11, 15 .ifindex = 1, 16 .tstamp = 7, 17 .wire_len = 100, 18 .gso_segs = 8, 19 .mark = 9, 20 .gso_size = 10, 21 .hwtstamp = 11, 22 }; 23 LIBBPF_OPTS(bpf_test_run_opts, tattr, 24 .data_in = &pkt_v4, 25 .data_size_in = sizeof(pkt_v4), 26 .ctx_in = &skb, 27 .ctx_size_in = sizeof(skb), 28 .ctx_out = &skb, 29 .ctx_size_out = sizeof(skb), 30 ); 31 struct bpf_object *obj; 32 int err, prog_fd, i; 33 34 err = bpf_prog_test_load("./test_skb_ctx.bpf.o", BPF_PROG_TYPE_SCHED_CLS, 35 &obj, &prog_fd); 36 if (!ASSERT_OK(err, "load")) 37 return; 38 39 /* ctx_in != NULL, ctx_size_in == 0 */ 40 41 tattr.ctx_size_in = 0; 42 err = bpf_prog_test_run_opts(prog_fd, &tattr); 43 ASSERT_NEQ(err, 0, "ctx_size_in"); 44 tattr.ctx_size_in = sizeof(skb); 45 46 /* ctx_out != NULL, ctx_size_out == 0 */ 47 48 tattr.ctx_size_out = 0; 49 err = bpf_prog_test_run_opts(prog_fd, &tattr); 50 ASSERT_NEQ(err, 0, "ctx_size_out"); 51 tattr.ctx_size_out = sizeof(skb); 52 53 /* non-zero [len, tc_index] fields should be rejected*/ 54 55 skb.len = 1; 56 err = bpf_prog_test_run_opts(prog_fd, &tattr); 57 ASSERT_NEQ(err, 0, "len"); 58 skb.len = 0; 59 60 skb.tc_index = 1; 61 err = bpf_prog_test_run_opts(prog_fd, &tattr); 62 ASSERT_NEQ(err, 0, "tc_index"); 63 skb.tc_index = 0; 64 65 /* non-zero [hash, sk] fields should be rejected */ 66 67 skb.hash = 1; 68 err = bpf_prog_test_run_opts(prog_fd, &tattr); 69 ASSERT_NEQ(err, 0, "hash"); 70 skb.hash = 0; 71 72 skb.sk = (struct bpf_sock *)1; 73 err = bpf_prog_test_run_opts(prog_fd, &tattr); 74 ASSERT_NEQ(err, 0, "sk"); 75 skb.sk = 0; 76 77 err = bpf_prog_test_run_opts(prog_fd, &tattr); 78 ASSERT_OK(err, "test_run"); 79 ASSERT_OK(tattr.retval, "test_run retval"); 80 ASSERT_EQ(tattr.ctx_size_out, sizeof(skb), "ctx_size_out"); 81 82 for (i = 0; i < 5; i++) 83 ASSERT_EQ(skb.cb[i], i + 2, "ctx_out_cb"); 84 ASSERT_EQ(skb.priority, 7, "ctx_out_priority"); 85 ASSERT_EQ(skb.ifindex, 1, "ctx_out_ifindex"); 86 ASSERT_EQ(skb.ingress_ifindex, 11, "ctx_out_ingress_ifindex"); 87 ASSERT_EQ(skb.tstamp, 8, "ctx_out_tstamp"); 88 ASSERT_EQ(skb.mark, 10, "ctx_out_mark"); 89 90 bpf_object__close(obj); 91 } 92