/* SPDX-License-Identifier: GPL-2.0 *//* Copyright (c) 2018 Facebook */ #ifndef _LINUX_BTF_H#define _LINUX_BTF_H 1 #include <linux/types.h>#include <uapi/linux/btf.h> struct btf;struct btf_member;struct btf_type;union bpf_attr; extern const struct file_operations btf_fops; void btf_put(struct btf *btf);int btf_new_fd(const union bpf_attr *attr);struct btf *btf_get_by_fd(int fd);int btf_get_info_by_fd(const struct btf *btf,		       const union bpf_attr *attr,		       union bpf_attr __user *uattr);/* Figure out the size of a type_id.  If type_id is a modifier * (e.g. const), it will be resolved to find out the type with size. * * For example: * In describing "const void *",  type_id is "const" and "const" * refers to "void *".  The return type will be "void *". * * If type_id is a simple "int", then return type will be "int". * * @btf: struct btf object * @type_id: Find out the size of type_id. The type_id of the return *           type is set to *type_id. * @ret_size: It can be NULL.  If not NULL, the size of the return *            type is set to *ret_size. * Return: The btf_type (resolved to another type with size info if needed). *         NULL is returned if type_id itself does not have size info *         (e.g. void) or it cannot be resolved to another type that *         has size info. *         *type_id and *ret_size will not be changed in the *         NULL return case. */const struct btf_type *btf_type_id_size(const struct btf *btf,					u32 *type_id,					u32 *ret_size);void btf_type_seq_show(const struct btf *btf, u32 type_id, void *obj,		       struct seq_file *m);int btf_get_fd_by_id(u32 id);u32 btf_id(const struct btf *btf);bool btf_member_is_reg_int(const struct btf *btf, const struct btf_type *s,			   const struct btf_member *m,			   u32 expected_offset, u32 expected_size);int btf_find_spin_lock(const struct btf *btf, const struct btf_type *t);bool btf_type_is_void(const struct btf_type *t); static inline bool btf_type_is_ptr(const struct btf_type *t){	return BTF_INFO_KIND(t->info) == BTF_KIND_PTR;} static inline bool btf_type_is_int(const struct btf_type *t){	return BTF_INFO_KIND(t->info) == BTF_KIND_INT;} static inline bool btf_type_is_enum(const struct btf_type *t){	return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM;} static inline bool btf_type_is_typedef(const struct btf_type *t){	return BTF_INFO_KIND(t->info) == BTF_KIND_TYPEDEF;} static inline bool btf_type_is_func(const struct btf_type *t){	return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC;} static inline bool btf_type_is_func_proto(const struct btf_type *t){	return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC_PROTO;} #ifdef CONFIG_BPF_SYSCALLconst struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id);const char *btf_name_by_offset(const struct btf *btf, u32 offset);struct btf *btf_parse_vmlinux(void);struct btf *bpf_prog_get_target_btf(const struct bpf_prog *prog);#elsestatic inline const struct btf_type *btf_type_by_id(const struct btf *btf,						    u32 type_id){	return NULL;}static inline const char *btf_name_by_offset(const struct btf *btf,					     u32 offset){	return NULL;}#endif #endif