On Thu, Nov 09, 2017 at 04:44:32PM +0100, Hannes Reinecke wrote: > - We don't have the topology information in sysfs; We have all the topology information in sysfs, but you seem to look for the wrong thing. > while the namespace > device has the 'slaves' and 'holders' directories, they remain empty, > and the path devices don't even have those directories. I really would > like to see them populated to help things like dracut figuring out the > topology when building up a list of modules to include. Of course there aren't because there is not block device you can hold for the controller. > - The patch doesn't integrate with the 'claim' mechanism for block > devices, ie device-mapper might accidentally stumble upon it when > traversing devices. Same as above. There is no block device to be claimed. > I'll be sending two patches to resurrect the 'bd_link_disk_holder' > idea I posted earlier; that should take care of these issues. It doesn't. There is not block device you can hold, so there is no point in claiming it.
