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To: Brian Fundakowski Feldman <green@FreeBSD.org>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Thu, 20 Oct 2005 11:07:39 EDT."
	<20051020150739.GB43031@green.homeunix.org> 
Date: Thu, 20 Oct 2005 21:30:11 +0200
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Cc: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>,
	Pawel Jakub Dawidek <pjd@FreeBSD.org>,
	FreeBSD current mailing list <current@FreeBSD.org>
Subject: Re: mount memory modified after free 
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In message <20051020150739.GB43031@green.homeunix.org>, Brian Fundakowski Feldm
an writes:
>On Thu, Oct 20, 2005 at 08:51:33AM +0200, Poul-Henning Kamp wrote:
>> In message <20051020063303.GA19624@garage.freebsd.pl>, Pawel Jakub Dawidek writ
>> es:
>> 
>> >Bascially there is only one place to store mount-point's
>> >vnode in device structure (IIRC) and if you mount the same provider twice,
>> >it will be overwritten and you'll not be able to unmount first file system
>> >without panicing.
>> 
>> There is more, you also need to cope with the UFS snapshot data hung
>> off the cdev etc.
>
>There's UFS snapshot data for read-only mounts?

Yes, why shouldn't you be able to access snapshots just because you
mount r/o ?

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.