From 3644d285462a60c80ac225d508fcfe705640d2b4 Mon Sep 17 00:00:00 2001 From: Kui-Feng Lee Date: Wed, 28 Feb 2024 22:45:19 -0800 Subject: libbpf: Set btf_value_type_id of struct bpf_map for struct_ops. For a struct_ops map, btf_value_type_id is the type ID of it's struct type. This value is required by bpftool to generate skeleton including pointers of shadow types. The code generator gets the type ID from bpf_map__btf_value_type_id() in order to get the type information of the struct type of a map. Signed-off-by: Kui-Feng Lee Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20240229064523.2091270-2-thinker.li@gmail.com --- tools/lib/bpf/libbpf.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'tools/lib') diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 01f407591a92..c759628f4250 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -1229,6 +1229,7 @@ static int init_struct_ops_maps(struct bpf_object *obj, const char *sec_name, map->name = strdup(var_name); if (!map->name) return -ENOMEM; + map->btf_value_type_id = type_id; map->def.type = BPF_MAP_TYPE_STRUCT_OPS; map->def.key_size = sizeof(int); @@ -4857,6 +4858,10 @@ static int bpf_object__create_map(struct bpf_object *obj, struct bpf_map *map, b create_attr.btf_value_type_id = 0; map->btf_key_type_id = 0; map->btf_value_type_id = 0; + break; + case BPF_MAP_TYPE_STRUCT_OPS: + create_attr.btf_value_type_id = 0; + break; default: break; } -- cgit v1.2.3