pub fn copy_batch(jobs: &[Job<'_>]) -> Vec<Result<u64>> ⓘExpand description
Copy every job, returning a per-job result (bytes written, or the error that should trigger a portable-path fallback for that single file).
Small files (≤MAX_FILE) use the existing read/write batching path.
Medium files (≤MAX_LARGE_FILE) use linked splice SQEs when the kernel
supports it. Larger files are rejected so the caller falls back.