On Thu, 5 May 2022 at 14:30, Karel Zak <kzak@xxxxxxxxxx> wrote: > Is there a way how to get mountinfo-like entry by mount ID for some > sub-tree? Something like: > > getfattr -etext -n ":mnt:info:21" / Yes: getfattr -etext -n ":mntns:21:info" / > > The interface has to be consistent with some notification system (I > see your question about fsnotify/fanotify at linux-fsdevel) and mount > ID seems better than paths due to over-mounts, etc. Right. If the mount notification doesn't fit into fsnotify well, the original patch from David could be used. I think that part was uncontroversial. Thanks, Miklos