Struct CallbackDevice 

pub struct CallbackDevice {
    pub size: u64,
    pub read: ReadCb,
    pub write: Option<WriteCb>,
    pub flush: Option<FlushCb>,
}

Fields

size: u64

read: ReadCb

write: Option<WriteCb>

flush: Option<FlushCb>

Trait Implementations

impl BlockDevice for CallbackDevice

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

Write exactly buf.len() bytes at offset. Default: returns Error::ReadOnly.

fn flush(&self) -> Result<()>

Flush pending writes to stable storage. No-op by default.

fn is_writable(&self) -> bool

Whether write_at is likely to succeed. Mount paths use this to decide whether to attempt journal replay or stay strict-read-only.

impl BlockRead for CallbackDevice

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

Read exactly buf.len() bytes starting at offset (bytes from the start of the device).

fn size_bytes(&self) -> u64

Total device size in bytes. Used for bounds checks.