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ANDROID: rust_binder: define a Rust binder driver

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Define the Rust binder driver, and set up the helpers for making C types
accessible from Rust.

Link: https://lore.kernel.org/rust-for-linux/20231101-rust-binder-v1-1-08ba9197f637@google.com/
Change-Id: Ia216cfa72cad8506b39f1dcc815231ea1b4b65d0
Co-developed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@gmail.com>
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Bug: 278052745
This commit is contained in:
Wedson Almeida Filho 2023-05-16 12:43:20 +00:00 committed by Alice Ryhl
parent ae2f23944e
commit adfa541d88
4 changed files with 36 additions and 0 deletions
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11
drivers/android/Kconfig
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@ -13,6 +13,17 @@ config ANDROID_BINDER_IPC
Android process, using Binder to identify, invoke and pass arguments
between said processes.
config ANDROID_BINDER_IPC_RUST
bool "Android Binder IPC Driver in Rust"
depends on MMU && RUST
help
Binder is used in Android for both communication between processes,
and remote method invocation.
This means one Android process can call a method/routine in another
Android process, using Binder to identify, invoke and pass arguments
between said processes.
config ANDROID_BINDERFS
bool "Android Binderfs filesystem"
depends on ANDROID_BINDER_IPC

1
drivers/android/Makefile
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@ -4,5 +4,6 @@ ccflags-y += -I$(src) # needed for trace events
obj-$(CONFIG_ANDROID_BINDERFS) += binderfs.o
obj-$(CONFIG_ANDROID_BINDER_IPC) += binder.o binder_alloc.o
obj-$(CONFIG_ANDROID_BINDER_IPC_SELFTEST) += binder_alloc_selftest.o
obj-$(CONFIG_ANDROID_BINDER_IPC_RUST) += binder/rust_binder.o
obj-$(CONFIG_ANDROID_VENDOR_HOOKS) += vendor_hooks.o
obj-$(CONFIG_ANDROID_DEBUG_KINFO) += debug_kinfo.o

23
drivers/android/binder/rust_binder.rs Normal file
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@ -0,0 +1,23 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2024 Google LLC.
//! Binder -- the Android IPC mechanism.
use kernel::prelude::*;
module! {
type: BinderModule,
name: "rust_binder",
author: "Wedson Almeida Filho, Alice Ryhl",
description: "Android Binder",
license: "GPL",
}
struct BinderModule {}
impl kernel::Module for BinderModule {
fn init(_module: &'static kernel::ThisModule) -> Result<Self> {
Ok(Self {})
}
}

1
rust/bindings/bindings_helper.h
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@ -23,6 +23,7 @@
#include <linux/sched.h>
#include <linux/task_work.h>
#include <linux/workqueue.h>
#include <uapi/linux/android/binder.h>
/* `bindgen` gets confused at certain things. */
const size_t RUST_CONST_HELPER_ARCH_SLAB_MINALIGN = ARCH_SLAB_MINALIGN;