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bpf: Add selftest for BPF_ENABLE_STATS

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Add test for BPF_ENABLE_STATS, which should enable run_time_ns stats.

~/selftests/bpf# ./test_progs -t enable_stats  -v
test_enable_stats:PASS:skel_open_and_load 0 nsec
test_enable_stats:PASS:get_stats_fd 0 nsec
test_enable_stats:PASS:attach_raw_tp 0 nsec
test_enable_stats:PASS:get_prog_info 0 nsec
test_enable_stats:PASS:check_stats_enabled 0 nsec
test_enable_stats:PASS:check_run_cnt_valid 0 nsec
Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200430071506.1408910-4-songliubraving@fb.com
This commit is contained in:
Song Liu 2020-04-30 00:15:06 -07:00 committed by Alexei Starovoitov
parent 0bee106716
commit 31a9f7fe93
2 changed files with 63 additions and 0 deletions
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45
tools/testing/selftests/bpf/prog_tests/enable_stats.c Normal file
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@ -0,0 +1,45 @@
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "test_enable_stats.skel.h"
void test_enable_stats(void)
{
struct test_enable_stats *skel;
int stats_fd, err, prog_fd;
struct bpf_prog_info info;
__u32 info_len = sizeof(info);
int duration = 0;
skel = test_enable_stats__open_and_load();
if (CHECK(!skel, "skel_open_and_load", "skeleton open/load failed\n"))
return;
stats_fd = bpf_enable_stats(BPF_STATS_RUN_TIME);
if (CHECK(stats_fd < 0, "get_stats_fd", "failed %d\n", errno)) {
test_enable_stats__destroy(skel);
return;
}
err = test_enable_stats__attach(skel);
if (CHECK(err, "attach_raw_tp", "err %d\n", err))
goto cleanup;
test_enable_stats__detach(skel);
prog_fd = bpf_program__fd(skel->progs.test_enable_stats);
memset(&info, 0, info_len);
err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len);
if (CHECK(err, "get_prog_info",
"failed to get bpf_prog_info for fd %d\n", prog_fd))
goto cleanup;
if (CHECK(info.run_time_ns == 0, "check_stats_enabled",
"failed to enable run_time_ns stats\n"))
goto cleanup;
CHECK(info.run_cnt != skel->bss->count, "check_run_cnt_valid",
"invalid run_cnt stats\n");
cleanup:
test_enable_stats__destroy(skel);
close(stats_fd);
}

18
tools/testing/selftests/bpf/progs/test_enable_stats.c Normal file
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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Facebook
#include <linux/bpf.h>
#include <stdint.h>
#include <linux/types.h>
#include <bpf/bpf_helpers.h>
char _license[] SEC("license") = "GPL";
__u64 count = 0;
SEC("raw_tracepoint/sys_enter")
int test_enable_stats(void *ctx)
{
count += 1;
return 0;
}