/* SPDX-License-Identifier: GPL-2.0 *//* * Copyright (C) 2025 Google, Inc. */ #ifndef _LINUX_RUST_BINDER_H#define _LINUX_RUST_BINDER_H #include <uapi/linux/android/binder.h>#include <uapi/linux/android/binderfs.h> /* * These symbols are exposed by `rust_binderfs.c` and exist here so that Rust * Binder can call them. */int init_rust_binderfs(void); struct dentry;struct inode;struct dentry *rust_binderfs_create_proc_file(struct inode *nodp, int pid);void rust_binderfs_remove_file(struct dentry *dentry); /* * The internal data types in the Rust Binder driver are opaque to C, so we use * void pointer typedefs for these types. */ typedef void *rust_binder_transaction;typedef void *rust_binder_process;typedef void *rust_binder_node; struct rb_process_layout {	size_t arc_offset;	size_t task;}; struct rb_transaction_layout {	size_t debug_id;	size_t code;	size_t flags;	size_t from_thread;	size_t to_proc;	size_t target_node;}; struct rb_node_layout {	size_t arc_offset;	size_t debug_id;	size_t ptr;}; struct rust_binder_layout {	struct rb_transaction_layout t;	struct rb_process_layout p;	struct rb_node_layout n;}; extern const struct rust_binder_layout RUST_BINDER_LAYOUT; static inline size_t rust_binder_transaction_debug_id(rust_binder_transaction t){	return *(size_t *) (t + RUST_BINDER_LAYOUT.t.debug_id);} static inline u32 rust_binder_transaction_code(rust_binder_transaction t){	return *(u32 *) (t + RUST_BINDER_LAYOUT.t.code);} static inline u32 rust_binder_transaction_flags(rust_binder_transaction t){	return *(u32 *) (t + RUST_BINDER_LAYOUT.t.flags);} // Nullable!static inline rust_binder_node rust_binder_transaction_target_node(rust_binder_transaction t){	void *p = *(void **) (t + RUST_BINDER_LAYOUT.t.target_node); 	if (p)		p = p + RUST_BINDER_LAYOUT.n.arc_offset;	return p;} static inline rust_binder_process rust_binder_transaction_to_proc(rust_binder_transaction t){	void *p = *(void **) (t + RUST_BINDER_LAYOUT.t.to_proc); 	return p + RUST_BINDER_LAYOUT.p.arc_offset;} static inline struct task_struct *rust_binder_process_task(rust_binder_process t){	return *(struct task_struct **) (t + RUST_BINDER_LAYOUT.p.task);} static inline size_t rust_binder_node_debug_id(rust_binder_node t){	return *(size_t *) (t + RUST_BINDER_LAYOUT.n.debug_id);} static inline binder_uintptr_t rust_binder_node_ptr(rust_binder_node t){	return *(binder_uintptr_t *) (t + RUST_BINDER_LAYOUT.n.ptr);} #endif