[$] Retrieving kernel attributes

At the 2022 Linux Storage,Filesystem, Memory-management and BPF Summit (LSFMM), Amir Goldsteinand Miklos Szeredi led a discussion on a new interface for extractinginformation from kernel objects using the filesystem extended-attributes(xattr) interface. Since Szeredi was not present in Palm Springs, he co-ledthe session virtually over Zoom audio, which was the onlyfilesystem session with a virtual leader at LSFMM this year. Szeredi's proposalfor an interface of that sort had been posted just the day before the session.