Re: [Xen-devel] linux-2.4.29-xenU and blockdev --getss

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sat, Feb 12, 2005 at 07:37:12PM -0000, Ian Pratt wrote:
>  
> 
> > When I run blockdev --getss on Xen 2.0 Linux-2.4.29-xenU I get this:
> > 
> > $ blockdev --getss /dev/sda4
> > -1
> 
> I'll wager that there's some ioctl we're failing to implement, and that 
> blockdev doesn't check its return code.
> 
> Perhaps someone could add some tracing to blkfront.c to find out which ioctl.
> 

This patch (by Jari Ruusu) seems to fix the problem:

---
xen-2.0/linux-2.4.29-xen-sparse/arch/xen/drivers/blkif/frontend/vbd.c.old Fri 
Feb  4 15:38:31 2005
+++ xen-2.0/linux-2.4.29-xen-sparse/arch/xen/drivers/blkif/frontend/vbd.c Sun 
Feb 13 19:05:36 2005
@@ -288,7 +288,7 @@
         /* Need to skankily setup 'partition' information */
         gd->part[minor].start_sect = 0;
         gd->part[minor].nr_sects   = capacity;
-        gd->sizes[minor]           = capacity;
+        gd->sizes[minor]           = capacity>>(BLOCK_SIZE_BITS-9);

         gd->flags[minor >> gd->minor_shift] |= GENHD_FL_VIRT_PARTNS;
     }



After applying that patch the loopback-mounted devices have correct size
under xenU.. 

-- Pasi Kärkkäinen
       
                                   ^
                                .     .
                                 Linux
                              /    -    \
                             Choice.of.the
                           .Next.Generation.


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