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| // SPDX-License-Identifier: GPL-2.0
| #include <test_progs.h>
| #include <network_helpers.h>
|
| void test_skb_ctx(void)
| {
| struct __sk_buff skb = {
| .cb[0] = 1,
| .cb[1] = 2,
| .cb[2] = 3,
| .cb[3] = 4,
| .cb[4] = 5,
| .priority = 6,
| .ifindex = 1,
| .tstamp = 7,
| .wire_len = 100,
| .gso_segs = 8,
| .mark = 9,
| .gso_size = 10,
| };
| struct bpf_prog_test_run_attr tattr = {
| .data_in = &pkt_v4,
| .data_size_in = sizeof(pkt_v4),
| .ctx_in = &skb,
| .ctx_size_in = sizeof(skb),
| .ctx_out = &skb,
| .ctx_size_out = sizeof(skb),
| };
| struct bpf_object *obj;
| int err;
| int i;
|
| err = bpf_prog_load("./test_skb_ctx.o", BPF_PROG_TYPE_SCHED_CLS, &obj,
| &tattr.prog_fd);
| if (CHECK_ATTR(err, "load", "err %d errno %d\n", err, errno))
| return;
|
| /* ctx_in != NULL, ctx_size_in == 0 */
|
| tattr.ctx_size_in = 0;
| err = bpf_prog_test_run_xattr(&tattr);
| CHECK_ATTR(err == 0, "ctx_size_in", "err %d errno %d\n", err, errno);
| tattr.ctx_size_in = sizeof(skb);
|
| /* ctx_out != NULL, ctx_size_out == 0 */
|
| tattr.ctx_size_out = 0;
| err = bpf_prog_test_run_xattr(&tattr);
| CHECK_ATTR(err == 0, "ctx_size_out", "err %d errno %d\n", err, errno);
| tattr.ctx_size_out = sizeof(skb);
|
| /* non-zero [len, tc_index] fields should be rejected*/
|
| skb.len = 1;
| err = bpf_prog_test_run_xattr(&tattr);
| CHECK_ATTR(err == 0, "len", "err %d errno %d\n", err, errno);
| skb.len = 0;
|
| skb.tc_index = 1;
| err = bpf_prog_test_run_xattr(&tattr);
| CHECK_ATTR(err == 0, "tc_index", "err %d errno %d\n", err, errno);
| skb.tc_index = 0;
|
| /* non-zero [hash, sk] fields should be rejected */
|
| skb.hash = 1;
| err = bpf_prog_test_run_xattr(&tattr);
| CHECK_ATTR(err == 0, "hash", "err %d errno %d\n", err, errno);
| skb.hash = 0;
|
| skb.sk = (struct bpf_sock *)1;
| err = bpf_prog_test_run_xattr(&tattr);
| CHECK_ATTR(err == 0, "sk", "err %d errno %d\n", err, errno);
| skb.sk = 0;
|
| err = bpf_prog_test_run_xattr(&tattr);
| CHECK_ATTR(err != 0 || tattr.retval,
| "run",
| "err %d errno %d retval %d\n",
| err, errno, tattr.retval);
|
| CHECK_ATTR(tattr.ctx_size_out != sizeof(skb),
| "ctx_size_out",
| "incorrect output size, want %zu have %u\n",
| sizeof(skb), tattr.ctx_size_out);
|
| for (i = 0; i < 5; i++)
| CHECK_ATTR(skb.cb[i] != i + 2,
| "ctx_out_cb",
| "skb->cb[i] == %d, expected %d\n",
| skb.cb[i], i + 2);
| CHECK_ATTR(skb.priority != 7,
| "ctx_out_priority",
| "skb->priority == %d, expected %d\n",
| skb.priority, 7);
| CHECK_ATTR(skb.ifindex != 1,
| "ctx_out_ifindex",
| "skb->ifindex == %d, expected %d\n",
| skb.ifindex, 1);
| CHECK_ATTR(skb.tstamp != 8,
| "ctx_out_tstamp",
| "skb->tstamp == %lld, expected %d\n",
| skb.tstamp, 8);
| CHECK_ATTR(skb.mark != 10,
| "ctx_out_mark",
| "skb->mark == %u, expected %d\n",
| skb.mark, 10);
|
| bpf_object__close(obj);
| }
|
|
