Re: [PATCH v2 bpf-next 5/7] selftests/bpf: add BPF ringbuf selftests
From: Alexei Starovoitov <hidden>
Date: 2020-05-22 01:20:38
Also in:
bpf
On Sun, May 17, 2020 at 12:57:25PM -0700, Andrii Nakryiko wrote:
quoted hunk ↗ jump to hunk
diff --git a/tools/testing/selftests/bpf/progs/test_ringbuf_multi.c b/tools/testing/selftests/bpf/progs/test_ringbuf_multi.c new file mode 100644 index 000000000000..7eb85dd9cd66 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_ringbuf_multi.c@@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2019 Facebook
oops ;)
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+char _license[] SEC("license") = "GPL";
+
+struct sample {
+ int pid;
+ int seq;
+ long value;
+ char comm[16];
+};
+
+struct ringbuf_map {
+ __uint(type, BPF_MAP_TYPE_RINGBUF);
+ __uint(max_entries, 1 << 12);
+} ringbuf1 SEC(".maps"),
+ ringbuf2 SEC(".maps");
+
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY_OF_MAPS);
+ __uint(max_entries, 4);
+ __type(key, int);
+ __array(values, struct ringbuf_map);
+} ringbuf_arr SEC(".maps") = {
+ .values = {
+ [0] = &ringbuf1,
+ [2] = &ringbuf2,
+ },
+};the tests look great. Very easy to understand the usage model.