linux-kernel - Re: Re: [RFC/PATCH] revoke/frevoke system calls V2

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Message-Id: <1154016589.13509.56.camel@localhost.localdomain>
Date:	Thu, 27 Jul 2006 17:09:49 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	akpm@...l.org, viro@...iv.linux.org.uk, tytso@....edu,
	tigran@...itas.com
Subject: Re: Re: [RFC/PATCH] revoke/frevoke system calls V2

Ar Iau, 2006-07-27 am 18:33 +0300, ysgrifennodd Pekka Enberg:
> Don't device drivers already do that for f_ops->flush (filp_close) and

->flush is called when each closing occurs.

> vm_ops->close (munmap)? What revoke and frevoke do is basically
> unmap/fsync/close on all the open file descriptors.

What happens if an app is already blocked on a read when you do a
revoke ? The nasty case answer could be "it completes later on and
returns the users captured password"

Alan

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