* *type_size: (x * y * sizeof(u32)). Hence, *type_size always
* corresponds to the return type.
* *elem_type: u32
+ * *elem_id: id of u32
* *total_nelems: (x * y). Hence, individual elem size is
* (*type_size / *total_nelems)
*
* return type: type "struct X"
* *type_size: sizeof(struct X)
* *elem_type: same as return type ("struct X")
+ * *elem_id: 0
* *total_nelems: 1
*/
static const struct btf_type *
__btf_resolve_size(const struct btf *btf, const struct btf_type *type,
u32 *type_size, const struct btf_type **elem_type,
- u32 *total_nelems)
+ u32 *elem_id, u32 *total_nelems)
{
const struct btf_type *array_type = NULL;
- const struct btf_array *array;
+ const struct btf_array *array = NULL;
u32 i, size, nelems = 1;
for (i = 0; i < MAX_RESOLVE_DEPTH; i++) {
*total_nelems = nelems;
if (elem_type)
*elem_type = type;
+ if (elem_id)
+ *elem_id = array ? array->type : 0;
return array_type ? : type;
}
mname = __btf_name_by_offset(btf_vmlinux, member->name_off);
mtype = __btf_resolve_size(btf_vmlinux, mtype, &msize,
- &elem_type, &total_nelems);
+ &elem_type, NULL, &total_nelems);
if (IS_ERR(mtype)) {
bpf_log(log, "field %s doesn't have size\n", mname);
return -EFAULT;