Struct Ext2CharDeviceFileObject 

pub struct Ext2CharDeviceFileObject {
    device_info: DeviceFileInfo,
    file_id: u64,
    position: Mutex<u64>,
    filesystem: RwLock<Option<Weak<dyn FileSystemOperations>>>,
}

ext2 Character Device File Object

Handles character device operations through ext2 device files.

Fields

device_info: DeviceFileInfo

Device file info

file_id: u64

File ID

position: Mutex<u64>

Current position in the device (for seekable devices)

filesystem: RwLock<Option<Weak<dyn FileSystemOperations>>>

Weak reference to the filesystem

Implementations

impl Ext2CharDeviceFileObject

pub fn new(device_info: DeviceFileInfo, file_id: u64) -> Self

Create a new ext2 character device file object

pub fn set_filesystem(&self, fs: Weak<dyn FileSystemOperations>)

Set the filesystem reference

Trait Implementations

impl ControlOps for Ext2CharDeviceFileObject

fn control(&self, command: u32, arg: usize) -> Result<i32, &'static str>

Perform a control operation

fn supported_control_commands(&self) -> Vec<(u32, &'static str)>

Get a list of supported control commands

impl Debug for Ext2CharDeviceFileObject

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FileObject for Ext2CharDeviceFileObject

fn metadata(&self) -> Result<FileMetadata, StreamError>

Get metadata about the file

fn seek(&self, whence: SeekFrom) -> Result<u64, StreamError>

Seek to a position in the file stream

fn as_any(&self) -> &dyn Any

fn read_at(&self, offset: u64, buffer: &mut [u8]) -> Result<usize, StreamError>

Read data from a specific offset without changing internal position

fn write_at(&self, offset: u64, buffer: &[u8]) -> Result<usize, StreamError>

Write data to a specific offset without changing internal position

fn truncate(&self, size: u64) -> Result<(), StreamError>

Truncate the file to the specified size

fn sync(&self) -> Result<(), StreamError>

Synchronize file content to storage

impl MemoryMappingOps for Ext2CharDeviceFileObject

fn get_mapping_info( &self, _offset: usize, _length: usize, ) -> Result<(usize, usize, bool), &'static str>

Get mapping information for a region of the object

fn get_mapping_info_with( &self, offset: usize, length: usize, _is_shared: bool, ) -> Result<(usize, usize, bool), &'static str>

Get mapping information with sharing intent.

fn on_mapped(&self, vaddr: usize, paddr: usize, length: usize, offset: usize)

Notification that a mapping has been created

fn on_unmapped(&self, vaddr: usize, length: usize)

Notification that a mapping has been removed

fn supports_mmap(&self) -> bool

Check if memory mapping is supported

fn mmap_owner_name(&self) -> String

Diagnostic helper: return a short owner name for logging

fn resolve_fault( &self, access: &AccessKind, map: &VirtualMemoryMap, ) -> Result<ResolveFaultResult, ResolveFaultError>

impl Selectable for Ext2CharDeviceFileObject

fn current_ready(&self, interest: ReadyInterest) -> ReadySet

Return current readiness for the given interest set.

fn wait_until_ready( &self, interest: ReadyInterest, trapframe: &mut Trapframe, timeout_ticks: Option<u64>, ) -> SelectWaitOutcome

Block the current task using the provided trapframe until the interest becomes ready or the optional timeout (in ticks) expires.

fn set_nonblocking(&self, _enabled: bool)

Enable or disable non-blocking I/O semantics on this object.

fn is_nonblocking(&self) -> bool

Query whether non-blocking I/O semantics are enabled on this object.

impl StreamOps for Ext2CharDeviceFileObject

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

Read data from the stream

fn write(&self, buffer: &[u8]) -> Result<usize, StreamError>

Write data to the stream