Re: [RFC PATCH] Filesystem Journal Notifications

Andreas Dilger wrote:

That assumes agreement between the applications that are using this
interface.  It isn't at all desirable that applications have to know
the "mountpoint" of the filesystem in order to use inotify, and in
some cases (e.g. bind mount in a new namespace) there isn't even access
to the root inode.

A filesystem's root inode needn't be mounted at all.

You don't need a new namespace - bind mount is enough by itself.

It has me wondering - how can an application even tell when it has the
root inode of a filesystem?  You can't tell from /etc/mtab or
/proc/mounts, nor from traversing the filesystem itself - except for
filesystems where you know the expected inode number of the root inode.

-- Jamie