Struct UserSliceReadWrite 

pub struct UserSliceReadWrite { /* private fields */ }

A validated read-write reference to a user-space memory region.

Construction validates that [ptr, ptr+len) is mapped, user-accessible, and writable (writable implies readable on x86_64).

Implementations

impl UserSliceReadWrite

pub fn new(ptr: u64, len: usize) -> Result<Self, UserSliceError>

Create a new validated read-write user slice.

pub fn len(&self) -> usize

The length of the validated region in bytes.

pub fn is_empty(&self) -> bool

Whether the region is empty (zero length).

pub fn copy_to(&self, dest: &mut [u8]) -> usize

Copy validated user data into a kernel buffer.

pub fn copy_from(&self, src: &[u8]) -> usize

Copy kernel data into validated user memory.

pub fn write_val<T: Copy>(&self, val: &T) -> Result<(), UserSliceError>

Write a value of type T to the user slice.

Safety

The caller must ensure that T is Pod (plain old data) and that the slice is at least size_of::() bytes.

pub fn as_ptr(&self) -> u64

Get the raw pointer (for logging/debugging only).