Struct EventFdNode 

pub struct EventFdNode { /* private fields */ }

VfsNode wrapper around an eventfd instance.

This allows eventfd to be inserted into a process’s file table so that standard read()/write()/close()/epoll work on it. musl’s eventfd2() syscall expects a real file descriptor.

Implementations

impl EventFdNode

pub fn new(efd_id: u32) -> Self

Trait Implementations

impl Drop for EventFdNode

fn drop(&mut self)

Executes the destructor for this type.

impl VfsNode for EventFdNode

fn node_type(&self) -> NodeType

Node type query (also serves as vtable slot padding for AArch64)

fn read(&self, _offset: usize, buffer: &mut [u8]) -> Result<usize, KernelError>

Read data from the node

fn write(&self, _offset: usize, data: &[u8]) -> Result<usize, KernelError>

Write data to the node

fn poll_readiness(&self) -> u16

Poll readiness for I/O multiplexing (poll/epoll).

fn metadata(&self) -> Result<Metadata, KernelError>

Get metadata for the node

fn readdir(&self) -> Result<Vec<DirEntry>, KernelError>

List directory entries (if this is a directory)

fn lookup(&self, _name: &str) -> Result<Arc<dyn VfsNode>, KernelError>

Look up a child node by name (if this is a directory)

fn create( &self, _name: &str, _permissions: Permissions, ) -> Result<Arc<dyn VfsNode>, KernelError>

Create a new file in this directory

fn mkdir( &self, _name: &str, _permissions: Permissions, ) -> Result<Arc<dyn VfsNode>, KernelError>

Create a new directory in this directory

fn unlink(&self, _name: &str) -> Result<(), KernelError>

Remove a file or empty directory

fn truncate(&self, _size: usize) -> Result<(), KernelError>

Truncate the file to the specified size

fn link( &self, _name: &str, _target: Arc<dyn VfsNode>, ) -> Result<(), KernelError>

Create a hard link to this node

fn symlink( &self, _name: &str, _target: &str, ) -> Result<Arc<dyn VfsNode>, KernelError>

Create a symbolic link in this directory.

fn readlink(&self) -> Result<String, KernelError>

Read the target of a symbolic link.

fn chmod(&self, _permissions: Permissions) -> Result<(), KernelError>

Change permissions on this node

fn as_any(&self) -> Option<&dyn Any>

Downcast to &dyn core::any::Any for type-specific operations.