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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <network_helpers.h>
#include "test_xdp_context_test_run.skel.h"
void test_xdp_context_error(int prog_fd, struct bpf_test_run_opts opts,
__u32 data_meta, __u32 data, __u32 data_end,
__u32 ingress_ifindex, __u32 rx_queue_index,
__u32 egress_ifindex)
{
struct xdp_md ctx = {
.data = data,
.data_end = data_end,
.data_meta = data_meta,
.ingress_ifindex = ingress_ifindex,
.rx_queue_index = rx_queue_index,
.egress_ifindex = egress_ifindex,
};
int err;
opts.ctx_in = &ctx;
opts.ctx_size_in = sizeof(ctx);
err = bpf_prog_test_run_opts(prog_fd, &opts);
ASSERT_EQ(errno, EINVAL, "errno-EINVAL");
ASSERT_ERR(err, "bpf_prog_test_run");
}
void test_xdp_context_test_run(void)
{
struct test_xdp_context_test_run *skel = NULL;
char data[sizeof(pkt_v4) + sizeof(__u32)];
char bad_ctx[sizeof(struct xdp_md) + 1];
struct xdp_md ctx_in, ctx_out;
DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
.data_in = &data,
.data_size_in = sizeof(data),
.ctx_out = &ctx_out,
.ctx_size_out = sizeof(ctx_out),
.repeat = 1,
);
int err, prog_fd;
skel = test_xdp_context_test_run__open_and_load();
if (!ASSERT_OK_PTR(skel, "skel"))
return;
prog_fd = bpf_program__fd(skel->progs.xdp_context);
/* Data past the end of the kernel's struct xdp_md must be 0 */
bad_ctx[sizeof(bad_ctx) - 1] = 1;
opts.ctx_in = bad_ctx;
opts.ctx_size_in = sizeof(bad_ctx);
err = bpf_prog_test_run_opts(prog_fd, &opts);
ASSERT_EQ(errno, E2BIG, "extradata-errno");
ASSERT_ERR(err, "bpf_prog_test_run(extradata)");
*(__u32 *)data = XDP_PASS;
*(struct ipv4_packet *)(data + sizeof(__u32)) = pkt_v4;
opts.ctx_in = &ctx_in;
opts.ctx_size_in = sizeof(ctx_in);
memset(&ctx_in, 0, sizeof(ctx_in));
ctx_in.data_meta = 0;
ctx_in.data = sizeof(__u32);
ctx_in.data_end = ctx_in.data + sizeof(pkt_v4);
err = bpf_prog_test_run_opts(prog_fd, &opts);
ASSERT_OK(err, "bpf_prog_test_run(valid)");
ASSERT_EQ(opts.retval, XDP_PASS, "valid-retval");
ASSERT_EQ(opts.data_size_out, sizeof(pkt_v4), "valid-datasize");
ASSERT_EQ(opts.ctx_size_out, opts.ctx_size_in, "valid-ctxsize");
ASSERT_EQ(ctx_out.data_meta, 0, "valid-datameta");
ASSERT_EQ(ctx_out.data, 0, "valid-data");
ASSERT_EQ(ctx_out.data_end, sizeof(pkt_v4), "valid-dataend");
/* Meta data's size must be a multiple of 4 */
test_xdp_context_error(prog_fd, opts, 0, 1, sizeof(data), 0, 0, 0);
/* data_meta must reference the start of data */
test_xdp_context_error(prog_fd, opts, 4, sizeof(__u32), sizeof(data),
0, 0, 0);
/* Meta data must be 32 bytes or smaller */
test_xdp_context_error(prog_fd, opts, 0, 36, sizeof(data), 0, 0, 0);
/* Total size of data must match data_end - data_meta */
test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32),
sizeof(data) - 1, 0, 0, 0);
test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32),
sizeof(data) + 1, 0, 0, 0);
/* RX queue cannot be specified without specifying an ingress */
test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), sizeof(data),
0, 1, 0);
/* Interface 1 is always the loopback interface which always has only
* one RX queue (index 0). This makes index 1 an invalid rx queue index
* for interface 1.
*/
test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), sizeof(data),
1, 1, 0);
/* The egress cannot be specified */
test_xdp_context_error(prog_fd, opts, 0, sizeof(__u32), sizeof(data),
0, 0, 1);
test_xdp_context_test_run__destroy(skel);
}
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