Re: [PATCH] ext4: add generic uevent infrastructure

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On Tue, Nov 19, 2013 at 12:36:21PM +1100, Dave Chinner wrote:
> I certain agree with that. I'd also like to see ENOSPC notifications
> as that would obliviate the need for distros like RHEL to ship
> systemtap scripts to generate such notifications for admins....

The ENOSPC case would be a natural tag on to Jan's quota notification,
and I have a vague memory that someone started implementing it or
at least talked about it.

> 
> > Also Jan Kara has done quota netlink notifications a while ago, which
> > fit into the same sort of niche.
> 
> The question I'm asking is whether we really want a new interface
> for these events? Shouldn't we really try to use an existing
> filesystem event interface for generating these events

Good quetion, and the quota netlink notifications would be the natural
place to tag on at least some of this.

> (e.g.
> fanotify) rather than adding yet another disjoint filesystem event
> interface to the kernel?

It needs to be a per-fs interface, and as Dmitry pointed out fanotify
is a per-file one.  Nevermind thast it's an utterly horrible interface
that shouldn't have been merged and really should be disabled in distro
kernels..

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