Re: [PATCH 3/7] vfs: Add a mount-notification facility

From: David Howells
Date: Tue May 28 2019 - 19:12:06 EST

David Howells <dhowells@xxxxxxxxxx> wrote:

> > It might make sense to redesign this stuff so that watches don't hold
> > references on the object being watched.
> I explicitly made it hold a reference so that if you place a watch on an
> automounted mount it stops it from expiring.
> Further, if I create a watch on something, *should* it be unmountable, just as
> if I had a file open there or had chdir'd into there?

It gets trickier than that as I need a ref on the dentry on which the watch is
rooted to prevent it from getting culled.