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Re: Quotactl change

To: Alexander Viro <viro@xxxxxxxxxxxx>
Subject: Re: Quotactl change
From: Nathan Scott <nathans@xxxxxxx>
Date: Mon, 8 Oct 2001 20:34:18 +1000
Cc: Jan Kara <jack@xxxxxx>, Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxx
In-reply-to: <Pine.GSO.4.21.0110061417260.6465-100000@xxxxxxxxxxxxxxxxx>; from viro@xxxxxxxxxxxx on Sat, Oct 06, 2001 at 02:25:06PM -0400
References: <20011006150731.C30450@xxxxxxxxxxxxxxxxxxxxxxxx> <Pine.GSO.4.21.0110061417260.6465-100000@xxxxxxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
User-agent: Mutt/1.2.5i
hi all,

Al - is the attached patch more along the lines of what you
were after?

Jan - I think this is actually alot closer to what you were
talking about when we last discussed this.  Can you see any
problems from a VFS quota point of view here?  I had to make
small interface changes to a couple of the dquot.c routines
to make this simpler/more uniform in places - could you have
cross-check those for me?

many thanks.

On Sat, Oct 06, 2001 at 02:25:06PM -0400, Alexander Viro wrote:
> On Sat, 6 Oct 2001, Jan Kara wrote:
> >   Hello,
> > 
> >   I'm sending you a change for quotactl interface which Nathan Scott 
> > proposed
> > for XFS. Actually it's his patch with just a few changes from me.
> >   It allows quotactl() to be overidden by a filesystem and so XFS can do 
> > it's
> > tricks with quota without patching dquot.c. Sideeffect of this change is a
> > cleanup in quotactl() interface :).
> [snip]
>       Umm...  So you've just given to each fs driver a syscall with
> completely unspecified arguments?  I _really_ doubt that it's a good
> idea, especially since each instance will have to copy structures
> to/from userland.
>       Please, put switch by the first argument and copy_{to,from}_user()
> into the syscall itself.  Yes, it means more methods, but it helps to avoid
> large PITA couple of years down the road.


Attachment: quotactl.patch2
Description: Text document

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