[dm-devel] Getting mapped device namw

[Gili B]

Thanks
We are trying to create this module without modifying existing kernel code,
so that it will be easy to install it in existing environements.
using a name like dm-1 is not user freindly , since the user needs to go and figure out
this name before procceding.
I see that there's a method dm_copy_name_and_uuid , but its not extern.
I guess I'll just let the user set the name for now.
 
Thanks
-gili
 
> Date: Mon, 6 Jul 2015 12:49:56 +0300
> From: n.borisov at siteground.com
> To: dm-devel at redhat.com
> Subject: Re: [dm-devel] Getting mapped device namw
> 
> 
> 
> On 07/06/2015 12:40 PM, Gili B wrote:
> > Thanks
> > hash_cell is defined privately in dm_ioctl.c , so I cannot access it.
> The beauty of open source software is that you can always export it for
> you own needs :)
> 
> > also dm_get_mdptr ,is not extern so I can't access it neither.
> The function is exposed via device_mapper.h so you can just include this
> header. Poke the code around you might come up with an even better idea.
> But generally you wouldn't want to use the name the user provided.
> Instead, use the name of the block device being created e.g. dm-1. This
> can be obtained from the  dm_get_device function and using the dm_dev struct
> 
> >  
> > Thanks
> > -gili
> >  
> >> Date: Mon, 6 Jul 2015 12:32:33 +0300
> >> From: kernel at kyup.com
> >> To: dm-devel at redhat.com
> >> Subject: Re: [dm-devel] Getting mapped device namw
> >>
> >>
> >> On 07/06/2015 12:20 PM, Gili B wrote:
> >>> hi
> >>> when a user run :
> >>> dmsetup create [device name] ....
> >>> Can a device mapper target find out the device name that the user entered ?
> >>
> >> Apparently the name is being associated with a hash_cell object, which
> >> in turn is associated with struct mapped_device in dm_hash_insert
> >> (called from dev_create, which is invoked as part of the create IOCTL).
> >> So presumably if you get an instance of struct mapped_device and then
> >> invoke dm_get_mdptr(md). What you'd get is a pointer to struct hash_cell
> >>
> >>> I need it for creating entries in proc for example.
> >>>  
> >>> Thanks
> >>> -gili
> >>>  		 	   		  
> >>>
> >>>
> >>>
> >>> --
> >>> dm-devel mailing list
> >>> dm-devel at redhat.com
> >>> https://www.redhat.com/mailman/listinfo/dm-devel
> >>>
> >>
> >> --
> >> dm-devel mailing list
> >> dm-devel at redhat.com
> >> https://www.redhat.com/mailman/listinfo/dm-devel
> >  		 	   		  
> > 
> > 
> > 
> > --
> > dm-devel mailing list
> > dm-devel at redhat.com
> > https://www.redhat.com/mailman/listinfo/dm-devel
> > 
> 
> --
> dm-devel mailing list
> dm-devel at redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/dm-devel/attachments/20150708/e54e5904/attachment.htm>