Working with VFS (reading/writing files)

Hi I want to reading and writing files from I/O kit layer.in darwin-dev list i ask this question and answer was VFS! how i use vas?any docs or sample codes? Thanks _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.... This email sent to site_archiver@lists.apple.com