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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2020 Google LLC.
*/
#include <test_progs.h>
#include <cgroup_helpers.h>
#include <network_helpers.h>
#include "metadata_unused.skel.h"
#include "metadata_used.skel.h"
static int duration;
static int prog_holds_map(int prog_fd, int map_fd)
{
struct bpf_prog_info prog_info = {};
struct bpf_map_info map_info = {};
__u32 prog_info_len;
__u32 map_info_len;
__u32 *map_ids;
int nr_maps;
int ret;
int i;
map_info_len = sizeof(map_info);
ret = bpf_map_get_info_by_fd(map_fd, &map_info, &map_info_len);
if (ret)
return -errno;
prog_info_len = sizeof(prog_info);
ret = bpf_prog_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
if (ret)
return -errno;
map_ids = calloc(prog_info.nr_map_ids, sizeof(__u32));
if (!map_ids)
return -ENOMEM;
nr_maps = prog_info.nr_map_ids;
memset(&prog_info, 0, sizeof(prog_info));
prog_info.nr_map_ids = nr_maps;
prog_info.map_ids = ptr_to_u64(map_ids);
prog_info_len = sizeof(prog_info);
ret = bpf_prog_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
if (ret) {
ret = -errno;
goto free_map_ids;
}
ret = -ENOENT;
for (i = 0; i < prog_info.nr_map_ids; i++) {
if (map_ids[i] == map_info.id) {
ret = 0;
break;
}
}
free_map_ids:
free(map_ids);
return ret;
}
static void test_metadata_unused(void)
{
struct metadata_unused *obj;
int err;
obj = metadata_unused__open_and_load();
if (CHECK(!obj, "skel-load", "errno %d", errno))
return;
err = prog_holds_map(bpf_program__fd(obj->progs.prog),
bpf_map__fd(obj->maps.rodata));
if (CHECK(err, "prog-holds-rodata", "errno: %d", err))
return;
/* Assert that we can access the metadata in skel and the values are
* what we expect.
*/
if (CHECK(strncmp(obj->rodata->bpf_metadata_a, "foo",
sizeof(obj->rodata->bpf_metadata_a)),
"bpf_metadata_a", "expected \"foo\", value differ"))
goto close_bpf_object;
if (CHECK(obj->rodata->bpf_metadata_b != 1, "bpf_metadata_b",
"expected 1, got %d", obj->rodata->bpf_metadata_b))
goto close_bpf_object;
/* Assert that binding metadata map to prog again succeeds. */
err = bpf_prog_bind_map(bpf_program__fd(obj->progs.prog),
bpf_map__fd(obj->maps.rodata), NULL);
CHECK(err, "rebind_map", "errno %d, expected 0", errno);
close_bpf_object:
metadata_unused__destroy(obj);
}
static void test_metadata_used(void)
{
struct metadata_used *obj;
int err;
obj = metadata_used__open_and_load();
if (CHECK(!obj, "skel-load", "errno %d", errno))
return;
err = prog_holds_map(bpf_program__fd(obj->progs.prog),
bpf_map__fd(obj->maps.rodata));
if (CHECK(err, "prog-holds-rodata", "errno: %d", err))
return;
/* Assert that we can access the metadata in skel and the values are
* what we expect.
*/
if (CHECK(strncmp(obj->rodata->bpf_metadata_a, "bar",
sizeof(obj->rodata->bpf_metadata_a)),
"metadata_a", "expected \"bar\", value differ"))
goto close_bpf_object;
if (CHECK(obj->rodata->bpf_metadata_b != 2, "metadata_b",
"expected 2, got %d", obj->rodata->bpf_metadata_b))
goto close_bpf_object;
/* Assert that binding metadata map to prog again succeeds. */
err = bpf_prog_bind_map(bpf_program__fd(obj->progs.prog),
bpf_map__fd(obj->maps.rodata), NULL);
CHECK(err, "rebind_map", "errno %d, expected 0", errno);
close_bpf_object:
metadata_used__destroy(obj);
}
void test_metadata(void)
{
if (test__start_subtest("unused"))
test_metadata_unused();
if (test__start_subtest("used"))
test_metadata_used();
}
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