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