Add a selftest where map creation key type_id is a decl_tag
pointing to a struct. Without previous patch, a kernel warning will
appear similar to the one in the previous patch. With the previous
patch, the kernel warning is silenced.
Signed-off-by: Yonghong Song <yhs@xxxxxx>
---
tools/testing/selftests/bpf/prog_tests/btf.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/btf.c b/tools/testing/selftests/bpf/prog_tests/btf.c
index 210d643fda6c..69521e1dc330 100644
--- a/tools/testing/selftests/bpf/prog_tests/btf.c
+++ b/tools/testing/selftests/bpf/prog_tests/btf.c
@@ -3990,6 +3990,26 @@ static struct btf_raw_test raw_tests[] = {
.btf_load_err = true,
.err_str = "Invalid arg#1",
},
+{
+ .descr = "decl_tag test #18, struct member, decl_tag as the value type",
+ .raw_types = {
+ BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
+ BTF_STRUCT_ENC(0, 2, 8), /* [2] */
+ BTF_MEMBER_ENC(NAME_TBD, 1, 0),
+ BTF_MEMBER_ENC(NAME_TBD, 1, 32),
+ BTF_DECL_TAG_ENC(NAME_TBD, 2, -1), /* [3] */
+ BTF_END_RAW,
+ },
+ BTF_STR_SEC("\0m1\0m2\0tag"),
+ .map_type = BPF_MAP_TYPE_ARRAY,
+ .map_name = "tag_type_check_btf",
+ .key_size = sizeof(int),
+ .value_size = 8,
+ .key_type_id = 1,
+ .value_type_id = 3,
+ .max_entries = 1,
+ .map_create_err = true,
+},
{
.descr = "type_tag test #1",
.raw_types = {
--
2.34.1
