diff mbox series

[bpf-next,v6,1/5] libbpf: set btf_value_type_id of struct bpf_map for struct_ops.

Message ID 20240229064523.2091270-2-thinker.li@gmail.com (mailing list archive)
State Accepted
Commit 3644d285462a60c80ac225d508fcfe705640d2b4
Delegated to: BPF
Headers show
Series Create shadow types for struct_ops maps in skeletons | expand

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bpf/vmtest-bpf-next-VM_Test-21 success Logs for x86_64-gcc / test (test_maps, false, 360) / test_maps on x86_64 with gcc
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bpf/vmtest-bpf-next-VM_Test-40 success Logs for x86_64-llvm-18 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-18
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bpf/vmtest-bpf-next-VM_Test-13 success Logs for s390x-gcc / test (test_maps, false, 360) / test_maps on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-32 success Logs for x86_64-llvm-17 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-17
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bpf/vmtest-bpf-next-PR success PR summary
bpf/vmtest-bpf-next-VM_Test-15 success Logs for s390x-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-14 success Logs for s390x-gcc / test (test_progs, false, 360) / test_progs on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-29 success Logs for x86_64-llvm-17 / build-release / build for x86_64 with llvm-17 and -O2 optimization

Commit Message

Kui-Feng Lee Feb. 29, 2024, 6:45 a.m. UTC 
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 <thinker.li@gmail.com>
---
 tools/lib/bpf/libbpf.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 01f407591a92..4c322dd65e10 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 +4858,12 @@  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;
 	}