On Wed, Jul 28, 2021 at 4:18 AM www <ouyangxuan10@xxxxxxx> wrote: > > Dear Miklos Szeredi , Amir Goldstein and Kevin, > > I would like to ask some question in overlayfs： > 1. in overlayfs, where is the code for obtaining directory or file attributes? > > 2. Where is the code that combines lowerdir and Upper Dir into a visual part? > > thanks， > Byron > Those are very broad questions. In a very narrow sense the answers are 1. ovl_getattr() 2. ovl_iterate() and ovl_lookup() This is the most up to date documentation: https://www.kernel.org/doc/Documentation/filesystems/overlayfs.rst For anything beyond that, you'll need to read the code: https://elixir.bootlin.com/linux/latest/source/fs/overlayfs Thanks, Amir.
