Struct CachingDevice 

pub struct CachingDevice { /* private fields */ }

LRU read-cache wrapper. Wraps any BlockDevice (writable or not).

Implementations

impl CachingDevice

pub fn new( inner: Arc<dyn BlockDevice>, block_size: u64, capacity: usize, ) -> Arc<Self>

pub fn stats(&self) -> (u64, u64)

pub fn invalidate_all(&self)

Trait Implementations

impl BlockDevice for CachingDevice

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 CachingDevice

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.