Method open_backing_file

vmm/src/memory_manager.rs:1882–1898

(
        backing_file: &PathBuf,
        file_offset: u64,
        shared: bool,
    )

    }

    fn open_backing_file(
        backing_file: &PathBuf,
        file_offset: u64,
        shared: bool,
    ) -> Result<FileOffset, Error> {
        if backing_file.is_dir() {
            Err(Error::DirectoryAsBackingFileForMemory)
        } else {
            let f = OpenOptions::new()
                .read(true)
                .write(shared)
                .open(backing_file)
                .map_err(Error::SharedFileCreate)?;

            Ok(FileOffset::new(f, file_offset))
        }
    }

    #[allow(clippy::too_many_arguments)]
    pub fn create_ram_region_raw(