diff options
Diffstat (limited to 'samples/rust/rust_chrdev.rs')
-rw-r--r-- | samples/rust/rust_chrdev.rs | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/samples/rust/rust_chrdev.rs b/samples/rust/rust_chrdev.rs new file mode 100644 index 000000000000..9f5d564671ea --- /dev/null +++ b/samples/rust/rust_chrdev.rs @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0 + +//! Rust character device sample. + +use kernel::prelude::*; +use kernel::{chrdev, file}; + +module! { + type: RustChrdev, + name: b"rust_chrdev", + author: b"Rust for Linux Contributors", + description: b"Rust character device sample", + license: b"GPL", +} + +struct RustFile; + +impl file::Operations for RustFile { + kernel::declare_file_operations!(); + + fn open(_shared: &(), _file: &file::File) -> Result { + Ok(()) + } +} + +struct RustChrdev { + _dev: Pin<Box<chrdev::Registration<2>>>, +} + +impl kernel::Module for RustChrdev { + fn init(name: &'static CStr, module: &'static ThisModule) -> Result<Self> { + pr_info!("Rust character device sample (init)\n"); + + let mut chrdev_reg = chrdev::Registration::new_pinned(name, 0, module)?; + + // Register the same kind of device twice, we're just demonstrating + // that you can use multiple minors. There are two minors in this case + // because its type is `chrdev::Registration<2>` + chrdev_reg.as_mut().register::<RustFile>()?; + chrdev_reg.as_mut().register::<RustFile>()?; + + Ok(RustChrdev { _dev: chrdev_reg }) + } +} + +impl Drop for RustChrdev { + fn drop(&mut self) { + pr_info!("Rust character device sample (exit)\n"); + } +} |