From: Alexei Starovoitov <ast@kernel.org>
Date: Wed, 1 Dec 2021 10:10:36 -0800
Subject: selftests/bpf: Improve inner_map test coverage.
Patch-mainline: v5.17-rc1
Git-commit: d82fa9b708d7d8a9c275d86c4388d24ecc63206c
References: jsc#PED-1377
Check that hash and array inner maps are properly initialized.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211201181040.23337-14-alexei.starovoitov@gmail.com
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
tools/testing/selftests/bpf/progs/map_ptr_kern.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
--- a/tools/testing/selftests/bpf/progs/map_ptr_kern.c
+++ b/tools/testing/selftests/bpf/progs/map_ptr_kern.c
@@ -334,9 +334,11 @@ static inline int check_lpm_trie(void)
return 1;
}
+#define INNER_MAX_ENTRIES 1234
+
struct inner_map {
__uint(type, BPF_MAP_TYPE_ARRAY);
- __uint(max_entries, 1);
+ __uint(max_entries, INNER_MAX_ENTRIES);
__type(key, __u32);
__type(value, __u32);
} inner_map SEC(".maps");
@@ -348,7 +350,7 @@ struct {
__type(value, __u32);
__array(values, struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
- __uint(max_entries, 1);
+ __uint(max_entries, INNER_MAX_ENTRIES);
__type(key, __u32);
__type(value, __u32);
});
@@ -360,8 +362,13 @@ static inline int check_array_of_maps(vo
{
struct bpf_array *array_of_maps = (struct bpf_array *)&m_array_of_maps;
struct bpf_map *map = (struct bpf_map *)&m_array_of_maps;
+ struct bpf_array *inner_map;
+ int key = 0;
VERIFY(check_default(&array_of_maps->map, map));
+ inner_map = bpf_map_lookup_elem(array_of_maps, &key);
+ VERIFY(inner_map != 0);
+ VERIFY(inner_map->map.max_entries == INNER_MAX_ENTRIES);
return 1;
}
@@ -382,8 +389,13 @@ static inline int check_hash_of_maps(voi
{
struct bpf_htab *hash_of_maps = (struct bpf_htab *)&m_hash_of_maps;
struct bpf_map *map = (struct bpf_map *)&m_hash_of_maps;
+ struct bpf_htab *inner_map;
+ int key = 2;
VERIFY(check_default(&hash_of_maps->map, map));
+ inner_map = bpf_map_lookup_elem(hash_of_maps, &key);
+ VERIFY(inner_map != 0);
+ VERIFY(inner_map->map.max_entries == INNER_MAX_ENTRIES);
return 1;
}