From: Andries Brouwer <aebr@win.tue.nl>
To: Neil Brown <neilb@cse.unsw.edu.au>
Cc: Christoph Hellwig <hch@infradead.org>,
Linus Torvalds <torvalds@osdl.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 2 of 2 - Allow O_EXCL on a block device to claim exclusive use.
Date: Tue, 12 Aug 2003 04:56:10 +0200 [thread overview]
Message-ID: <20030812045610.B1650@pclin040.win.tue.nl> (raw)
In-Reply-To: <16184.18284.969212.342794@gargle.gargle.HOWL>; from neilb@cse.unsw.edu.au on Tue, Aug 12, 2003 at 11:48:28AM +1000
On Tue, Aug 12, 2003 at 11:48:28AM +1000, Neil Brown wrote:
> My first attempt at this did claim before openning.
> However that didn't work.
> Some aspects of the bdev that are needed for claiming are not
> initialised before it is first opened. In particular, bd_contains,
> gets set up by do_open.
Size and structure of partitions are entirely independent of whether
someone has opened them. Thus, the corresponding bookkeeping must
not be in struct block_device, which exists only when the device
is open, but in struct gendisk or so (and only there).
It is a design mistake to have such stuff in struct block device.
next prev parent reply other threads:[~2003-08-12 2:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-11 2:35 NeilBrown
2003-08-11 7:22 ` Christoph Hellwig
2003-08-12 1:48 ` Neil Brown
2003-08-12 2:56 ` Andries Brouwer [this message]
2003-08-12 3:06 ` viro
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