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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2019 Facebook */
#include <test_progs.h>
#include <linux/bpf.h>
#include "test_pe_preserve_elems.skel.h"
static int duration;
static void test_one_map(struct bpf_map *map, struct bpf_program *prog,
bool has_share_pe)
{
int err, key = 0, pfd = -1, mfd = bpf_map__fd(map);
DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts);
struct perf_event_attr attr = {
.size = sizeof(struct perf_event_attr),
.type = PERF_TYPE_SOFTWARE,
.config = PERF_COUNT_SW_CPU_CLOCK,
};
pfd = syscall(__NR_perf_event_open, &attr, 0 /* pid */,
-1 /* cpu 0 */, -1 /* group id */, 0 /* flags */);
if (CHECK(pfd < 0, "perf_event_open", "failed\n"))
return;
err = bpf_map_update_elem(mfd, &key, &pfd, BPF_ANY);
close(pfd);
if (CHECK(err < 0, "bpf_map_update_elem", "failed\n"))
return;
err = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts);
if (CHECK(err < 0, "bpf_prog_test_run_opts", "failed\n"))
return;
if (CHECK(opts.retval != 0, "bpf_perf_event_read_value",
"failed with %d\n", opts.retval))
return;
/* closing mfd, prog still holds a reference on map */
close(mfd);
err = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts);
if (CHECK(err < 0, "bpf_prog_test_run_opts", "failed\n"))
return;
if (has_share_pe) {
CHECK(opts.retval != 0, "bpf_perf_event_read_value",
"failed with %d\n", opts.retval);
} else {
CHECK(opts.retval != -ENOENT, "bpf_perf_event_read_value",
"should have failed with %d, but got %d\n", -ENOENT,
opts.retval);
}
}
void test_pe_preserve_elems(void)
{
struct test_pe_preserve_elems *skel;
skel = test_pe_preserve_elems__open_and_load();
if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
return;
test_one_map(skel->maps.array_1, skel->progs.read_array_1, false);
test_one_map(skel->maps.array_2, skel->progs.read_array_2, true);
test_pe_preserve_elems__destroy(skel);
}
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