Re: [RFC PATCH] getting misc stats/attributes via xattr API

On Thu, 5 May 2022 at 14:30, Karel Zak [off-list ref] 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