block devices in userland

block devices in userland

[Enrico Weigelt]

Hi folks,


is there an API for writing block device drivers in userland ?


thx
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Re: block devices in userland

[devzero]

>is there an API for writing block device drivers in userland ?

i don`t know if there is some in vanilla, but maybe dm-userspace is worth taking a look at ?
see http://wiki.xensource.com/xenwiki/DmUserspace

regards
roland




List:       linux-kernel
Subject:    block devices in userland
From:       Enrico Weigelt <weigelt () metux ! de>
Date:       2008-07-04 22:11:28
Message-ID: 20080704221127.GA25636 () nibiru ! local
[Download message RAW]


Hi folks,


is there an API for writing block device drivers in userland ?


thx
-- 
---------------------------------------------------------------------
 Enrico Weigelt    ==   metux IT service - http://www.metux.de/
---------------------------------------------------------------------
 Please visit the OpenSource QM Taskforce:
 	http://wiki.metux.de/public/OpenSource_QM_Taskforce
 Patches / Fixes for a lot dozens of packages in dozens of versions:
	http://patches.metux.de/
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Re: block devices in userland

[Enrico Weigelt]

* devzero@web.de <devzero@web.de> wrote:
> >is there an API for writing block device drivers in userland ?
> 
> i don`t know if there is some in vanilla, but maybe dm-userspace is worth taking a look at ?
> see http://wiki.xensource.com/xenwiki/DmUserspace

hmm, doesn't seem to be what I'm looking for - it just leaves the 
mapping of virtual to physical blocks to userland. 

What I need is passing the whole read/write requests to some userland
deamon - these blocks won't come from any (in-kernel) block device,
but an totally different kind of storage (eg. venti).


cu
-- 
---------------------------------------------------------------------
 Enrico Weigelt    ==   metux IT service - http://www.metux.de/
---------------------------------------------------------------------
 Please visit the OpenSource QM Taskforce:
 	http://wiki.metux.de/public/OpenSource_QM_Taskforce
 Patches / Fixes for a lot dozens of packages in dozens of versions:
	http://patches.metux.de/
---------------------------------------------------------------------

Re: block devices in userland

[Pavel Machek]

On Sat 2008-07-05 18:29:02, Enrico Weigelt wrote:
> * devzero@web.de <devzero@web.de> wrote:
> > >is there an API for writing block device drivers in userland ?
> > 
> > i don`t know if there is some in vanilla, but maybe dm-userspace is worth taking a look at ?
> > see http://wiki.xensource.com/xenwiki/DmUserspace
> 
> hmm, doesn't seem to be what I'm looking for - it just leaves the 
> mapping of virtual to physical blocks to userland. 
> 
> What I need is passing the whole read/write requests to some userland
> deamon - these blocks won't come from any (in-kernel) block device,
> but an totally different kind of storage (eg. venti).

nbd, but be careful about deadlocks.

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