samples/rust/rust_debugfs_scoped.rs

Source file repositories/reference/linux-study-clean/samples/rust/rust_debugfs_scoped.rs

File Facts

System
Linux kernel
Corpus path
samples/rust/rust_debugfs_scoped.rs
Extension
.rs
Size
3905 bytes
Lines
145
Domain
Support Tooling And Documentation
Bucket
samples
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct RustScopedDebugFs {
    _data: Pin<KBox<Scope<ModuleData>>>,
}

#[pin_data]
struct ModuleData {
    device_dir: Dir,
    #[pin]
    devices: Mutex<KVec<Pin<KBox<Scope<DeviceData>>>>>,
}

impl ModuleData {
    fn init(device_dir: Dir) -> impl PinInit<Self> {
        pin_init! {
            Self {
                device_dir: device_dir,
                devices <- new_mutex!(KVec::new())
            }
        }
    }
}

struct DeviceData {
    name: CString,
    nums: KVec<Atomic<usize>>,
    blob: Pin<KBox<Mutex<[u8; SZ_4K]>>>,
}

fn init_control(base_dir: &Dir, dyn_dirs: Dir) -> impl PinInit<Scope<ModuleData>> + '_ {
    base_dir.scope(ModuleData::init(dyn_dirs), c"control", |data, dir| {
        dir.write_only_callback_file(c"create", data, &create_file_write);
        dir.write_only_callback_file(c"remove", data, &remove_file_write);
    })
}

impl kernel::Module for RustScopedDebugFs {
    fn init(_module: &'static kernel::ThisModule) -> Result<Self> {
        let base_dir = Dir::new(c"rust_scoped_debugfs");
        let dyn_dirs = base_dir.subdir(c"dynamic");
        Ok(Self {
            _data: KBox::pin_init(init_control(&base_dir, dyn_dirs), GFP_KERNEL)?,
        })
    }
}

Annotation

Implementation Notes