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vmm: add a safety comment for EpollContext

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Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu 2021-11-17 17:42:33 +00:00 committed by Rob Bradford
parent 32af6f9723
commit ff0e92ab88
1 changed files with 1 additions and 0 deletions
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vmm/src/lib.rs
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@ -178,6 +178,7 @@ impl EpollContext {
pub fn new() -> result::Result<EpollContext, io::Error> { pub fn new() -> result::Result<EpollContext, io::Error> {
let epoll_fd = epoll::create(true)?; let epoll_fd = epoll::create(true)?;
// Use 'File' to enforce closing on 'epoll_fd' // Use 'File' to enforce closing on 'epoll_fd'
// SAFETY: the epoll_fd returned by epoll::create is valid and owned by us.
let epoll_file = unsafe { File::from_raw_fd(epoll_fd) }; let epoll_file = unsafe { File::from_raw_fd(epoll_fd) };
Ok(EpollContext { epoll_file }) Ok(EpollContext { epoll_file })