fn read(
        &mut self,
        _req: &Request<'_>,
        _ino: u64,
        _fh: u64,
        _offset: i64,
        _size: u32,
    ) -> Result<reply::Data<'_>> {
        Err(libc::ENOSYS)
    }
/// Read data from an open file.
///
/// `read` should send exactly the number of bytes requested except on EOF or error, otherwise
/// the rest of the data will be substituted with zeroes. An exception to this is when the file
/// has been opened in 'direct_io' mode, in which case the return value of the read system call
/// will reflect the return value of this operation. `fh` will contain the value set by the
/// open method.
Read data from an open file.
`read` should send exactly the number of bytes requested except on EOF or error, otherwise
the rest of the data will be substituted with zeroes. An exception to this is when the file
has been opened in 'direct_io' mode, in which case the return value of the read system call
will reflect the return value of this operation. `fh` will contain the value set by the
open method.
Read data from an open file . ` read ` should send exactly the number of bytes requested except on EOF or error otherwise the rest of the data will be substituted with zeroes . An exception to this is when the file has been opened in ' direct_io ' mode in which case the return value of the read system call will reflect the return value of this operation . ` fh ` will contain the value set by the open method .
fn read(
        &mut self,
        _req: &Request<'_>,
        _ino: u64,
        _fh: u64,
        _offset: i64,
        _size: u32,
    ) -> Result<reply::Data<'_>> {
        Err(libc::ENOSYS)
    }
fn read ( & mut self , _req : & Request < ' _ > , _ino : u64 , _fh : u64 , _offset : i64 , _size : u32 , ) -> Result < reply :: Data < ' _ > > { Err ( libc :: ENOSYS ) }
Read data from an open file.
Read data from an open file .
&mut self
_req
&Request<'_>
_ino
u64
_fh
u64
_offset
i64
_size
u32
&mut self
_req
&Request<'_>
_ino
u64
_fh
u64
_offset
i64
_size
u32