Struct disk::SingleFileDisk

pub struct SingleFileDisk {
    pub(crate) inner: IoSource<File>,
    pub(crate) is_block_device_file: bool,
}

A disk backed by a single file that implements AsyncDisk for access.

Fields

inner: IoSource<File>

is_block_device_file: bool

Implementations

impl SingleFileDisk

pub fn new(disk: File, ex: &Executor) -> Result<Self>

Trait Implementations

impl AsyncDisk for SingleFileDisk

fn flush<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<()>> + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Flush intermediary buffers and/or dirty state to file. fsync not required.

fn fsync<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<()>> + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Asynchronously fsyncs any completed operations to the disk.

fn fdatasync<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<()>> + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Asynchronously fdatasyncs any completed operations to the disk. Note that an implementation may simply call fsync for fdatasync.

fn read_to_mem<'a, 'async_trait>( &'a self, file_offset: u64, mem: Arc<dyn BackingMemory + Send + Sync>, mem_offsets: MemRegionIter<'a>, ) -> Pin<Box<dyn Future<Output = Result<usize>> + 'async_trait>>

where Self: 'async_trait, 'a: 'async_trait,

Reads from the file at ‘file_offset’ into memory mem at mem_offsets. mem_offsets is similar to an iovec except relative to the start of mem.

fn write_from_mem<'a, 'async_trait>( &'a self, file_offset: u64, mem: Arc<dyn BackingMemory + Send + Sync>, mem_offsets: MemRegionIter<'a>, ) -> Pin<Box<dyn Future<Output = Result<usize>> + 'async_trait>>

where Self: 'async_trait, 'a: 'async_trait,

Writes to the file at ‘file_offset’ from memory mem at mem_offsets.

fn punch_hole<'life0, 'async_trait>( &'life0 self, file_offset: u64, length: u64, ) -> Pin<Box<dyn Future<Output = Result<()>> + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Replaces a range of bytes with a hole.

fn write_zeroes_at<'life0, 'async_trait>( &'life0 self, file_offset: u64, length: u64, ) -> Pin<Box<dyn Future<Output = Result<()>> + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Writes up to length bytes of zeroes to the stream, returning how many bytes were written.

fn read_double_buffered<'life0, 'life1, 'async_trait>( &'life0 self, file_offset: u64, buf: &'life1 mut [u8], ) -> Pin<Box<dyn Future<Output = Result<usize>> + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Reads from the file at ‘file_offset’ into buf.

fn write_double_buffered<'life0, 'life1, 'async_trait>( &'life0 self, file_offset: u64, buf: &'life1 [u8], ) -> Pin<Box<dyn Future<Output = Result<usize>> + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Writes to the file at ‘file_offset’ from buf.

impl DiskGetLen for SingleFileDisk

fn get_len(&self) -> Result<u64>

Get the current length of the disk in bytes.

impl FileAllocate for SingleFileDisk

fn allocate(&self, offset: u64, len: u64) -> Result<()>

Allocate storage for the region of the file starting at offset and extending len bytes.

impl FileSetLen for SingleFileDisk

fn set_len(&self, len: u64) -> Result<()>