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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"
#include "test_xdp_meta.skel.h"
#define TX_ADDR "10.0.0.1"
#define RX_ADDR "10.0.0.2"
#define RX_NAME "veth0"
#define TX_NAME "veth1"
#define TX_NETNS "xdp_context_tx"
#define RX_NETNS "xdp_context_rx"
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 255 bytes or smaller */
test_xdp_context_error(prog_fd, opts, 0, 256, 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);
}
void test_xdp_context_functional(void)
{
LIBBPF_OPTS(bpf_tc_hook, tc_hook, .attach_point = BPF_TC_INGRESS);
LIBBPF_OPTS(bpf_tc_opts, tc_opts, .handle = 1, .priority = 1);
struct netns_obj *rx_ns = NULL, *tx_ns = NULL;
struct bpf_program *tc_prog, *xdp_prog;
struct test_xdp_meta *skel = NULL;
struct nstoken *nstoken = NULL;
int rx_ifindex;
int ret;
tx_ns = netns_new(TX_NETNS, false);
if (!ASSERT_OK_PTR(tx_ns, "create tx_ns"))
return;
rx_ns = netns_new(RX_NETNS, false);
if (!ASSERT_OK_PTR(rx_ns, "create rx_ns"))
goto close;
SYS(close, "ip link add " RX_NAME " netns " RX_NETNS
" type veth peer name " TX_NAME " netns " TX_NETNS);
nstoken = open_netns(RX_NETNS);
if (!ASSERT_OK_PTR(nstoken, "setns rx_ns"))
goto close;
SYS(close, "ip addr add " RX_ADDR "/24 dev " RX_NAME);
SYS(close, "ip link set dev " RX_NAME " up");
skel = test_xdp_meta__open_and_load();
if (!ASSERT_OK_PTR(skel, "open and load skeleton"))
goto close;
rx_ifindex = if_nametoindex(RX_NAME);
if (!ASSERT_GE(rx_ifindex, 0, "if_nametoindex rx"))
goto close;
tc_hook.ifindex = rx_ifindex;
ret = bpf_tc_hook_create(&tc_hook);
if (!ASSERT_OK(ret, "bpf_tc_hook_create"))
goto close;
tc_prog = bpf_object__find_program_by_name(skel->obj, "ing_cls");
if (!ASSERT_OK_PTR(tc_prog, "open ing_cls prog"))
goto close;
tc_opts.prog_fd = bpf_program__fd(tc_prog);
ret = bpf_tc_attach(&tc_hook, &tc_opts);
if (!ASSERT_OK(ret, "bpf_tc_attach"))
goto close;
xdp_prog = bpf_object__find_program_by_name(skel->obj, "ing_xdp");
if (!ASSERT_OK_PTR(xdp_prog, "open ing_xdp prog"))
goto close;
ret = bpf_xdp_attach(rx_ifindex,
bpf_program__fd(xdp_prog),
0, NULL);
if (!ASSERT_GE(ret, 0, "bpf_xdp_attach"))
goto close;
close_netns(nstoken);
nstoken = open_netns(TX_NETNS);
if (!ASSERT_OK_PTR(nstoken, "setns tx_ns"))
goto close;
SYS(close, "ip addr add " TX_ADDR "/24 dev " TX_NAME);
SYS(close, "ip link set dev " TX_NAME " up");
ASSERT_OK(SYS_NOFAIL("ping -c 1 " RX_ADDR), "ping");
close:
close_netns(nstoken);
test_xdp_meta__destroy(skel);
netns_free(rx_ns);
netns_free(tx_ns);
}
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