1 // SPDX-License-Identifier: GPL-2.0
2 #include <test_progs.h>
3 #include <network_helpers.h>
4 #include "test_xdp_context_test_run.skel.h"
5
6 void test_xdp_context_error(int prog_fd, struct bpf_test_run_opts opts,
7 __u32 data_meta, __u32 data, __u32 data_end,
8 __u32 ingress_ifindex, __u32 rx_queue_index,
9 __u32 egress_ifindex)
10 {
11 struct xdp_md ctx = {
12 .data = data,
13 .data_end = data_end,
14 .data_meta = data_meta,
15 .ingress_ifindex = ingress_ifindex,
16 .rx_queue_index = rx_queue_index,
17 .egress_ifindex = egress_ifindex,
18 };
19 int err;
20
21 opts.ctx_in = &ctx;
22 opts.ctx_size_in = sizeof(ctx);
23 err = bpf_prog_test_run_opts(prog_fd, &opts);
24 ASSERT_EQ(errno, EINVAL, "errno-EINVAL");
25 ASSERT_ERR(err, "bpf_prog_test_run");
26 }
27
28 void test_xdp_context_test_run(void)
29 {
30 struct test_xdp_context_test_run *skel = NULL;
31 char data[sizeof(pkt_v4) + sizeof(__u32)];
32 char bad_ctx[sizeof(struct xdp_md) + 1];
33 struct xdp_md ctx_in, ctx_out;
34 DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
35 .data_in = &data,
36 .data_size_in = sizeof(data),
37 .ctx_out = &ctx_out,
38 .ctx_size_out = sizeof(ctx_out),
39 .repeat = 1,
40 );
41 int err, prog_fd;
42
43 skel = test_xdp_context_test_run__open_and_load();
44 if (!ASSERT_OK_PTR(skel, "skel"))
45 return;
46 prog_fd = bpf_program__fd(skel->progs.xdp_context);
47
48 /* Data past the end of the kernel's struct xdp_md must be 0 */
49 bad_ctx[sizeof(bad_ctx) - 1] = 1;
50 opts.ctx_in = bad_ctx;
51 opts.ctx_size_in = sizeof(bad_ctx);
52 err = bpf_prog_test_run_opts(prog_fd, &opts);
53 ASSERT_EQ(errno, E2BIG, "extradata-errno");
54 ASSERT_ERR(err, "bpf_prog_test_run(extradata)");
55
56 *(__u32 *)data = XDP_PASS;
57 *(struct ipv4_packet *)(data + sizeof(__u32)) = pkt_v4;
58 opts.ctx_in = &ctx_in;
59 opts.ctx_size_in = sizeof(ctx_in);
60 memset(&ctx_in, 0, sizeof(ctx_in));
61 ctx_in.data_meta = 0;
62 ctx_in.data = sizeof(__u32);
63 ctx_in.data_end = ctx_in.data + sizeof(pkt_v4);
64 err = bpf_prog_test_run_opts(prog_fd, &opts);
65 ASSERT_OK(err, "bpf_prog_test_run(valid)");
66 ASSERT_EQ(opts.retval, XDP_PASS, "valid-retval");
67 ASSERT_EQ(opts.data_size_out, sizeof(pkt_v4), "valid-datasize");
68 ASSERT_EQ(opts.ctx_size_out, opts.ctx_size_in, "valid-ctxsize");
69 ASSERT_EQ(ctx_out.data_meta, 0, "valid-datameta");
70 ASSERT_EQ(ctx_out.data, 0, "valid-data");
71 ASSERT_EQ(ctx_out.data_end, sizeof(pkt_v4), "valid-dataend");
72
73 /* Meta data's size must be a multiple of 4 */
74 test_xdp_context_error(prog_fd, opts, 0, 1, sizeof(data), 0, 0, 0);
75
76 /* data_meta must reference the start of data */
77 test_xdp_context_error(prog_fd, opts, 4, sizeof(__u32), sizeof(data),
78 0, 0, 0);
79
80 /* Meta data must be 255 bytes or smaller */
81 test_xdp_context_error(prog_fd, opts, 0, 256, sizeof(data), 0, 0, 0);
82
83 /* Total size of data must match data_end - data_meta */
84 test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32),
85 sizeof(data) - 1, 0, 0, 0);
86 test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32),
87 sizeof(data) + 1, 0, 0, 0);
88
89 /* RX queue cannot be specified without specifying an ingress */
90 test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), sizeof(data),
91 0, 1, 0);
92
93 /* Interface 1 is always the loopback interface which always has only
94 * one RX queue (index 0). This makes index 1 an invalid rx queue index
95 * for interface 1.
96 */
97 test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), sizeof(data),
98 1, 1, 0);
99
100 /* The egress cannot be specified */
101 test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), sizeof(data),
102 0, 0, 1);
103
104 test_xdp_context_test_run__destroy(skel);
105 }
106
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