On Tue, Aug 05, 2008 at 12:12:21PM +0200, Chris Lalancette wrote:
Recently upstream Xen added support for having xvd devices > 16. For the most part, this doesn't really concern libvirt, since for things like attach and detach we just pass it through and let xend worry about whether it is supported or not. The one place this breaks down is in the stats collecting code, where we need to figure out the device number so we can go digging in /sys for the statistics.
To remedy this, I've re-written xenLinuxDomainDeviceID() to use regular expressions to figure out the device number from the name. The major advantage is that now xenLinuxDomainDeviceID() looks fairly identical to tools/python/xen/util/blkif.py (in the Xen sources), so that adding additional devices in the future should be much easier. It also reduces the size of the code, and, in my opinion, the code complexity.
With this patch in place, I was able to get block statistics both on older style devices (/dev/xvda) and on the new, expanded devices (/dev/xvdaa).
Sounds good to me even if I don't grasp all the naming convention.
Signed-off-by: Chris Lalancette <clalance@redhat.com> [...] + /* OK, we have a match; see if we have a partition */ + *part = 0; + if (pmatch[1].rm_so != -1) + *part = strtol(path + pmatch[1].rm_so, NULL, 10);
let's use __virStrToLong_i internally I think it makes that code a bit more readable too, +1 thanks Daniel -- Red Hat Virtualization group http://redhat.com/virtualization/ Daniel Veillard | virtualization library http://libvirt.org/ veillard@redhat.com | libxml GNOME XML XSLT toolkit http://xmlsoft.org/ http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/