[$] XFS online filesystem check and repair

Darrick Wong has been doing work on XFS onlinerepair for a number of years and things are getting to the point where most of the filesystem-internal workhas been completed and is under review. The work remaining mostly concernsthe user-space side to set up a periodic scan and repair cycle, so he wanted to discuss whatuser space needs from this kind of feature in a filesystem session at the 2023 Linux Storage, Filesystem,Memory-Management and BPF Summit that he led remotely. The session maynot have gone quite as he hoped, as it got somewhat derailed by topics thatspilled over from the earlier session onunprivileged image mounts.