Trait kernel::file::IoctlHandler

pub trait IoctlHandler: Sync {
    type Target<'a>;

    fn pure(
        _this: Self::Target<'_>, 
        _file: &File, 
        _cmd: u32, 
        _arg: usize
    ) -> Result<i32> { ... }
    fn read(
        _this: Self::Target<'_>, 
        _file: &File, 
        _cmd: u32, 
        _writer: &mut UserSlicePtrWriter
    ) -> Result<i32> { ... }
    fn write(
        _this: Self::Target<'_>, 
        _file: &File, 
        _cmd: u32, 
        _reader: &mut UserSlicePtrReader
    ) -> Result<i32> { ... }
    fn read_write(
        _this: Self::Target<'_>, 
        _file: &File, 
        _cmd: u32, 
        _data: UserSlicePtr
    ) -> Result<i32> { ... }
}

Allows the handling of ioctls defined with the _IO, _IOR, _IOW, and _IOWR macros.

For each macro, there is a handler function that takes the appropriate types as arguments.

Required Associated Types

type Target<'a>

The type of the first argument to each associated function.

Provided Methods

fn pure(
    _this: Self::Target<'_>,
    _file: &File,
    _cmd: u32,
    _arg: usize
) -> Result<i32>

Handles ioctls defined with the _IO macro, that is, with no buffer as argument.

fn read(
    _this: Self::Target<'_>,
    _file: &File,
    _cmd: u32,
    _writer: &mut UserSlicePtrWriter
) -> Result<i32>

Handles ioctls defined with the _IOR macro, that is, with an output buffer provided as argument.

fn write(
    _this: Self::Target<'_>,
    _file: &File,
    _cmd: u32,
    _reader: &mut UserSlicePtrReader
) -> Result<i32>

Handles ioctls defined with the _IOW macro, that is, with an input buffer provided as argument.

fn read_write(
    _this: Self::Target<'_>,
    _file: &File,
    _cmd: u32,
    _data: UserSlicePtr
) -> Result<i32>

Handles ioctls defined with the _IOWR macro, that is, with a buffer for both input and output provided as argument.

Implementors