linux/samples/rust/rust_minimal.rs

// SPDX-License-Identifier: GPL-2.0

//! Rust minimal sample.

use kernel::prelude::*;

module! {
    type: RustMinimal,
    name: "rust_minimal",
    authors: ["Rust for Linux Contributors"],
    description: "Rust minimal sample",
    license: "GPL",
    params: {
        test_parameter: i64 {
            default: 1,
            description: "This parameter has a default of 1",
        },
        test_bool_parameter: bool {
            default: false,
            description: "This boolean parameter defaults to false",
        },
    },
}

struct RustMinimal {
    numbers: KVec<i32>,
}

impl kernel::Module for RustMinimal {
    fn init(_module: &'static ThisModule) -> Result<Self> {
        pr_info!("Rust minimal sample (init)\n");
        pr_info!("Am I built-in? {}\n", !cfg!(MODULE));
        pr_info!(
            "test_parameter: {}\n",
            module_parameters::test_parameter.value()
        );
        pr_info!(
            "test_bool_parameter: {}\n",
            module_parameters::test_bool_parameter.value()
        );

        let mut numbers = KVec::new();
        numbers.push(72, GFP_KERNEL)?;
        numbers.push(108, GFP_KERNEL)?;
        numbers.push(200, GFP_KERNEL)?;

        Ok(RustMinimal { numbers })
    }
}

impl Drop for RustMinimal {
    fn drop(&mut self) {
        pr_info!("My numbers are {:?}\n", self.numbers);
        pr_info!("Rust minimal sample (exit)\n");
    }
}