Struct VfsFileObject 

pub struct VfsFileObject {
    inner: Arc<dyn FileObject>,
    vfs_entry: Arc<VfsEntry>,
    mount_point: Arc<MountPoint>,
    original_path: String,
}

VfsFileObject wraps a filesystem-specific FileObject with VFS-layer information

This wrapper provides the VFS layer with access to path hierarchy information while delegating actual file operations to the underlying FileSystem implementation.

Fields

inner: Arc<dyn FileObject>

The underlying FileObject from the filesystem implementation

vfs_entry: Arc<VfsEntry>

The VfsEntry this FileObject was created from (for *at syscalls)

mount_point: Arc<MountPoint>

The mount point containing this VfsEntry

original_path: String

The original path used to open this file (for debugging/logging)

Implementations

impl VfsFileObject

pub fn new( inner: Arc<dyn FileObject>, vfs_entry: Arc<VfsEntry>, mount_point: Arc<MountPoint>, original_path: String, ) -> Self

Create a new VfsFileObject

pub fn get_vfs_entry(&self) -> &Arc<VfsEntry>

Get the VfsEntry this FileObject was created from

pub fn get_mount_point(&self) -> &Arc<MountPoint>

Get the mount point containing this VfsEntry

pub fn get_original_path(&self) -> &str

Get the original path used to open this file

pub fn as_any(&self) -> &dyn Any

Enable downcasting for VfsFileObject detection

Trait Implementations

impl ControlOps for VfsFileObject

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 FileObject for VfsFileObject

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

Seek to a position in the file stream

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

Get metadata about the file

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

Truncate the file to the specified size

fn as_any(&self) -> &dyn Any

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

Synchronize file content to storage

impl MemoryMappingOps for VfsFileObject

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

impl Selectable for VfsFileObject

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 VfsFileObject

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