Documentation on device-mapper and friends

[neha naik]

Hi Gaurav,
 I went through your blog and it is really informative. But after reading
that i realized that i have a question:
  If I want to write a block device driver which is going to sit on lvm
(and do some functionality on top of it) then should i go for the block
device driver api
  or write it as a device mapper target. What are the
advantages/disadvantages of both the approaches.

Regards,
Neha

On Tue, Apr 30, 2013 at 4:24 AM, Gaurav Mahajan <gauravmahajan2007 at gmail.com
> wrote:

> Hi Amit,
>
> I had compiled some notes on my blog.
> Here are some links on writing your own device mapper target.
> http://techgmm.blogspot.in/p/writing-your-own-device-mapper-target.html
>
> Concept of device mapper target.
> http://techgmm.blogspot.in/p/device-mapper-layer-explored-every.html
>
> Thanks,
> Gaurav.
>
>
> On Tue, Apr 30, 2013 at 5:05 AM, Anatol Pomozov <anatol.pomozov at gmail.com>wrote:
>
>> Hi
>>
>> On Mon, Apr 29, 2013 at 9:51 AM, amit mehta <gmate.amit at gmail.com> wrote:
>> > On Sun, Apr 28, 2013 at 5:24 PM, Greg Freemyer <greg.freemyer at gmail.com>
>> wrote:
>> >> A nice diagram of the overall storage subsystem is at
>> http://www.thomas-krenn.com/en/oss/linux-io-stack-diagram.html
>> >>
>> >> Dm is just a single block in it, but it can help to see where it fits
>> in overall.
>> >>
>> >> Btw: that diagram doesn't show the legacy ata driver that creates
>> /dev/hdx style devices.  Has that been dropped while I wasn't paying
>> attention?  I haven't used it in years, but I thought it was still used on
>> embedded systems.
>> >>
>> >
>> > Thank you for sharing the link, but I'm looking for more
>> > detailed information on I/O stack in Linux, dm-mapper and
>> > multipath in particular.
>>
>> Some docs about multipath can be found here
>>
>> http://www.sourceware.org/lvm2/wiki/MultipathUsageGuide
>> http://christophe.varoqui.free.fr/refbook.html
>>
>> The userspace part for tools is here
>> http://sourceware.org/lvm2/
>>
>> _______________________________________________
>> Kernelnewbies mailing list
>> Kernelnewbies at kernelnewbies.org
>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>>
>
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20130501/ca68038c/attachment.html