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

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Date:	Thu, 20 Jul 2006 23:01:34 +0000
From:	"roucaries bastien" <roucaries.bastien@...il.com>
To:	7eggert@....de
Cc:	"Pekka J Enberg" <penberg@...helsinki.fi>,
	alan@...rguk.ukuu.org.uk, tytso@....edu,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [RFC/PATCH] revoke/frevoke system calls

On 7/20/06, Bodo Eggert <7eggert@...tempel.de> wrote:
> Pekka J Enberg <penberg@...Helsinki.FI> wrote:
> > From: Pekka Enberg <penberg@...helsinki.fi>
>
> > This patch implements the revoke(2) and frevoke(2) system calls for all
> > types of files. We revoke files in two passes: first we scan all open
> > files that refer to the inode and substitute the struct file pointer in fd
> > table with NULL causing all subsequent operations on that fd to fail.
> > After we have done that to all file descriptors, we close the files and
> > take down mmaps.
>
> RFC2: Make umount -f work on local fs using this feature.
RFC3: use preliminary work about umount -f in order to get revoke for free.
See for instance
http://developer.osdl.org/dev/fumount/kernel2/patches/2.6.12/1/forced-unmount-2.6.12-1.patch
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