Struct UserSliceWrite 

pub struct UserSliceWrite { /* private fields */ }

A validated writable reference to a user-space memory region.

Construction validates that [ptr, ptr+len) is mapped, user-accessible, and writable. After construction, the kernel can safely write to this region.

Implementations

impl UserSliceWrite

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

Create a new validated writable user slice.

Fails if:

• ptr is null
• ptr + len overflows or crosses into kernel space
• Any page in the range is not mapped, not user-accessible, or not writable

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_from(&self, src: &[u8]) -> usize

Copy kernel data into validated user memory.

Copies min(src.len(), self.len) bytes and returns how many were copied.

pub fn zero(&self)

Zero-fill the validated user memory region.

pub fn as_ptr(&self) -> u64

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