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// SPDX-License-Identifier: GPL-2.0
#include <uapi/linux/bpf.h>
#include <linux/if_link.h>
#include <test_progs.h>
#include "test_xdp_devmap_helpers.skel.h"
#include "test_xdp_with_devmap_helpers.skel.h"
#define IFINDEX_LO 1
struct bpf_devmap_val {
u32 ifindex; /* device index */
union {
int fd; /* prog fd on map write */
u32 id; /* prog id on map read */
} bpf_prog;
};
void test_xdp_with_devmap_helpers(void)
{
struct test_xdp_with_devmap_helpers *skel;
struct bpf_prog_info info = {};
struct bpf_devmap_val val = {
.ifindex = IFINDEX_LO,
};
__u32 len = sizeof(info);
__u32 duration = 0, idx = 0;
int err, dm_fd, map_fd;
skel = test_xdp_with_devmap_helpers__open_and_load();
if (CHECK_FAIL(!skel)) {
perror("test_xdp_with_devmap_helpers__open_and_load");
return;
}
/* can not attach program with DEVMAPs that allow programs
* as xdp generic
*/
dm_fd = bpf_program__fd(skel->progs.xdp_redir_prog);
err = bpf_set_link_xdp_fd(IFINDEX_LO, dm_fd, XDP_FLAGS_SKB_MODE);
CHECK(err == 0, "Generic attach of program with 8-byte devmap",
"should have failed\n");
dm_fd = bpf_program__fd(skel->progs.xdp_dummy_dm);
map_fd = bpf_map__fd(skel->maps.dm_ports);
err = bpf_obj_get_info_by_fd(dm_fd, &info, &len);
if (CHECK_FAIL(err))
goto out_close;
val.bpf_prog.fd = dm_fd;
err = bpf_map_update_elem(map_fd, &idx, &val, 0);
CHECK(err, "Add program to devmap entry",
"err %d errno %d\n", err, errno);
err = bpf_map_lookup_elem(map_fd, &idx, &val);
CHECK(err, "Read devmap entry", "err %d errno %d\n", err, errno);
CHECK(info.id != val.bpf_prog.id, "Expected program id in devmap entry",
"expected %u read %u\n", info.id, val.bpf_prog.id);
/* can not attach BPF_XDP_DEVMAP program to a device */
err = bpf_set_link_xdp_fd(IFINDEX_LO, dm_fd, XDP_FLAGS_SKB_MODE);
CHECK(err == 0, "Attach of BPF_XDP_DEVMAP program",
"should have failed\n");
val.ifindex = 1;
val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_prog);
err = bpf_map_update_elem(map_fd, &idx, &val, 0);
CHECK(err == 0, "Add non-BPF_XDP_DEVMAP program to devmap entry",
"should have failed\n");
out_close:
test_xdp_with_devmap_helpers__destroy(skel);
}
void test_neg_xdp_devmap_helpers(void)
{
struct test_xdp_devmap_helpers *skel;
__u32 duration = 0;
skel = test_xdp_devmap_helpers__open_and_load();
if (CHECK(skel,
"Load of XDP program accessing egress ifindex without attach type",
"should have failed\n")) {
test_xdp_devmap_helpers__destroy(skel);
}
}
void test_xdp_devmap_attach(void)
{
if (test__start_subtest("DEVMAP with programs in entries"))
test_xdp_with_devmap_helpers();
if (test__start_subtest("Verifier check of DEVMAP programs"))
test_neg_xdp_devmap_helpers();
}
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