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Message-Id: <20240910144111.1464912-3-chen.dylane@gmail.com>
Date: Tue, 10 Sep 2024 22:41:11 +0800
From: Tao Chen <chen.dylane@...il.com>
To: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Andrii Nakryiko <andrii@...nel.org>,
Eduard Zingerman <eddyz87@...il.com>,
Song Liu <song@...nel.org>,
Hou Tao <houtao1@...wei.com>,
Yonghong Song <yonghong.song@...ux.dev>,
John Fastabend <john.fastabend@...il.com>,
KP Singh <kpsingh@...nel.org>,
Stanislav Fomichev <sdf@...ichev.me>
Cc: Tao Chen <chen.dylane@...il.com>,
bpf@...r.kernel.org,
linux-kernel@...r.kernel.org,
Jinke Han <jinkehan@...iglobal.com>
Subject: [v3 PATCH bpf-next 2/2] bpf/selftests: Check errno when percpu map value size exceeds
This test case checks the errno message when percpu map value size
exceeds PCPU_MIN_UNIT_SIZE.
root@...ian:~# ./test_maps
...
test_map_percpu_stats_hash_of_maps:PASS
test_map_percpu_stats_map_value_size:PASS
test_sk_storage_map:PASS
Signed-off-by: Tao Chen <chen.dylane@...il.com>
Signed-off-by: Jinke Han <jinkehan@...iglobal.com>
---
.../selftests/bpf/map_tests/map_percpu_stats.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/tools/testing/selftests/bpf/map_tests/map_percpu_stats.c b/tools/testing/selftests/bpf/map_tests/map_percpu_stats.c
index 2ea36408816b..1c7c04288eff 100644
--- a/tools/testing/selftests/bpf/map_tests/map_percpu_stats.c
+++ b/tools/testing/selftests/bpf/map_tests/map_percpu_stats.c
@@ -17,6 +17,7 @@
#define MAX_ENTRIES_HASH_OF_MAPS 64
#define N_THREADS 8
#define MAX_MAP_KEY_SIZE 4
+#define PCPU_MIN_UNIT_SIZE 32768
static void map_info(int map_fd, struct bpf_map_info *info)
{
@@ -456,6 +457,22 @@ static void map_percpu_stats_hash_of_maps(void)
printf("test_%s:PASS\n", __func__);
}
+static void map_percpu_stats_map_value_size(void)
+{
+ int fd;
+ int value_sz = PCPU_MIN_UNIT_SIZE + 1;
+ struct bpf_map_create_opts opts = { .sz = sizeof(opts) };
+ enum bpf_map_type map_types[] = { BPF_MAP_TYPE_PERCPU_ARRAY,
+ BPF_MAP_TYPE_PERCPU_HASH,
+ BPF_MAP_TYPE_LRU_PERCPU_HASH };
+ for (int i = 0; i < ARRAY_SIZE(map_types); i++) {
+ fd = bpf_map_create(map_types[i], NULL, sizeof(__u32), value_sz, 1, &opts);
+ CHECK(fd < 0 && errno != E2BIG, "percpu map value size",
+ "error: %s\n", strerror(errno));
+ }
+ printf("test_%s:PASS\n", __func__);
+}
+
void test_map_percpu_stats(void)
{
map_percpu_stats_hash();
@@ -467,4 +484,5 @@ void test_map_percpu_stats(void)
map_percpu_stats_percpu_lru_hash();
map_percpu_stats_percpu_lru_hash_no_common();
map_percpu_stats_hash_of_maps();
+ map_percpu_stats_map_value_size();
}
--
2.43.0
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