[dm-devel] ioctl HDIO_GETGEO to device mapper devpath

[Hannes Reinecke]

On 10/14/2010 11:40 AM, Santosh Sarangi wrote:
> Hi,
> I have a linux  mapper device on the host, I would like to get the start
> offset.
> I get this by the following ioctl . Although the call succeeds but it sets
> the hd_geometry_rec to "0"
> 
> I checked through gdb , the ioctl call suceeds ,but sets all the field of
> hd_geometry to "0"
> 
Yep. Device-mapper device are able to report the geometry, but you
have to set it first :-)

The attached patch should fix this.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare at suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)
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