From: christophe.varoqui@free.fr
To: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [Q] claimed block devices
Date: Thu, 22 Jul 2004 17:54:45 +0200 [thread overview]
Message-ID: <1090511685.40ffe345f252b@imp6-q.free.fr> (raw)
In-Reply-To: <1090499383.17489.39.camel@shaggy.austin.ibm.com>
Selon Dave Kleikamp <shaggy@austin.ibm.com>:
> On Thu, 2004-07-22 at 04:51, christophe.varoqui@free.fr wrote:
> > Hello,
> >
> > does somebody know how a userspace C-proggy can detect if a block device is
> > claimed ? Creating a device map over such devices will fail, so better not
> to
> > try.
>
> I believe trying to open the device with O_EXCL will fail if the device
> is claimed.
>
> Shaggy
> --
if I read fs/block_dev.c correctly, O_EXCL will always fail on block device.
I would also like to use the lock owner information ... which seems even more
tricky.
regards,
cvaroqui
--
next prev parent reply other threads:[~2004-07-22 15:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-22 9:51 christophe.varoqui
2004-07-22 12:29 ` Dave Kleikamp
2004-07-22 15:54 ` christophe.varoqui [this message]
2004-07-22 16:13 ` Dave Kleikamp
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