From: viro@parcelfarce.linux.theplanet.co.uk
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Bernd Eckenfels <ecki@calista.eckenfels.6bone.ka-ip.net>,
Christoph Hellwig <hch@infradead.org>
Subject: Re: RO --bind mount implementation ...
Date: Tue, 5 Aug 2003 17:59:24 +0100 [thread overview]
Message-ID: <20030805165924.GF12757@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <20030804221615.GA18521@www.13thfloor.at>
On Tue, Aug 05, 2003 at 12:16:15AM +0200, Herbert Pötzl wrote:
> anyway, I discussed this with some friends, and
> they pointed out that this would be useful ...
> so here is the first try ...
Umm... You know, the most obvious system call that should care about
read-only is open(pathname, O_RDWR) ;-) IOW, taking care of directory
modifications is not enough - you need to deal with
* opening file for write
* truncation (both from *truncate() and from open() with O_TRUNC)
* metadata changes (timestamps, ownership, permissions)
But yes, it's not that far from where we should eventualy get.
next prev parent reply other threads:[~2003-08-05 17:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-04 22:16 RO --bind mount implementation Herbert Pötzl
2003-08-04 23:43 ` Sean Neakums
2003-08-05 0:49 ` Herbert Pötzl
2003-08-05 16:59 ` viro [this message]
2003-08-05 22:51 ` Herbert Pötzl
2003-08-05 23:14 ` Herbert Pötzl
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