fn open_dir(fs: &Fs, guest: &[u8]) -> Result<Option<Arc<OwnedFd>>, i32>Expand description
Opens the canonical guest directory guest from the mount point it lies under.
Each component below the mount point is a directory the walk already
resolved, so one that is a symlink now was swapped in since: that is a
RETRY, as the walk must resolve it in the guest namespace.
ยงReturns
None when the mount point has no host side yet (textual lookups).