[libvirt] wrong path of domblkstat

[Chris Lalancette]

On 06/10/10 - 10:46:52AM, jbuy0710 wrote:
> Hi all:
> 
> I tried to use virsh domblkstat to get block information of a vm(xen
> para-virtualized), and it returns error message like this
>      error: Failed to get block stats vm1 hda
>      error: internal error read_bd_stats: Failed to read any block statistics
> 
> I found the code in \src\xen\block_stats.c is wrong
> 
> in line 121
>              "/sys/devices/xen-backend/vbd-%d-%d/statistics/%s",
> should be
>             "/sys/devices/vbd-%d-%d/statistics/%s",
> in line 127 should be
>            "/sys/devices/tap-%d-%d/statistics/%s",
> 
> After modified and rebuild the soure code,the domblkstat can work fine.
> Anyone can help to update the code in the git?

Unfortunately, it's not that simple.  Older style Xen (like what is in RHEL-5)
use the "/sys/devices/xen-backend" path; I'm assuming new-style Xen (like you
are possibly using) use the new style path.  What dom0 kernel version are you
using?  If you submit a patch to try out both paths, that will probably be
acceptable.

--
Chris Lalancette