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Re: [linux-lvm] LV only detected when using "lvscan -D" on amd64 kernel



On Mon, Oct 27, 2003 at 03:58:04PM +0100, Felix Domke wrote:
> Hi,
> 
> >User space parses and passes it via ioctls to the kernel.
> >Please look at lvm.h for the ioctls defined and the structures involved.
> >Grep the LVM1 library source in tools/lib/ for "ioctl" to get you started.
> >  
> >
> Where exactly is the LV information passed to the kernel? is it 
> "LV_CREATE"?

Yes.

> 
> The kernel seems to don't know the LV, the LV_STATUS_BYINDEX on the 
> "/dev/fast/group" returns "No such device or address" (ENXIO) for each 
> index, including 0, which should be the LV in question.
> 
> It looks as "lvm_do_lv_status_byindex" in the kernel returns -ENXIO 
> because vg_ptr->lv[lv_status_byindex_req.lv_index] is zero. Where is the 
> point where this array is written? I only found LV_CREATE, but that's 
> only called in vgimport, vgmerge and lvcreate, so it looks as there is 

See lvm_do_vg_create() and lvm_do_lv_create() functions in the driver.

> another place.
> 
> 
> Can you point me in the direction?
> 
> 
> Felix
> 
> 
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm sistina com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
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                                                  Germany
Mauelshagen Sistina com                           +49 2626 141200
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