From: Milan Broz <gmazyland@gmail.com>
To: Dennis Birkholz <dm-crypt@dennis.birkholz.biz>
Cc: dm-crypt@saout.de
Subject: Re: [dm-crypt] Toggle read-only status of mapping
Date: Thu, 25 Oct 2012 12:15:39 +0200 [thread overview]
Message-ID: <5089114B.8050106@gmail.com> (raw)
In-Reply-To: <50862339.6060201@dennis.birkholz.biz>
On 10/23/2012 06:55 AM, Dennis Birkholz wrote:
> currently it is possible to create a read-only mapping, but to me it
> seems not possible to switch a rw mapping to a ro mapping or vice versa.
> I use Software-RAID5->Luks->Ext4, do switch everything to read-only I
> have to unmount, remove crypt mapping, create ro crypt mapping, mount
> ro, switch raid to ro but it would be very nice if I only can switch
> everything to ro.
Hm. What is the reason for this exercise?
Switching to read only of top layer is not enough?
Anyway, I think we can add this option to "resize" command perhaps.
(Resize reloads mapping, so it can switch read-only flag as well.)
But it can be dangerous in some situations...
(And you can do it already using dmsetup but that's quite complicated.)
Milan
next prev parent reply other threads:[~2012-10-25 10:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-23 4:55 [dm-crypt] Toggle read-only status of mapping Dennis Birkholz
2012-10-25 10:15 ` Milan Broz [this message]
2012-10-25 14:50 ` Dennis Birkholz
2012-10-25 15:20 ` Milan Broz
2012-10-25 17:10 ` Dennis Birkholz
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