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Re: [PATCH 1/2] virdevmapper: Don't error on kernels without DM support



On 8/18/20 10:10 AM, Pino Toscano wrote:


What about stat()ing /dev/mapper/control? That should give you the
major/minor of that special character device.


That won't help. We need to get the major of devmapper targets. For instance, if there is /dev/dm-0 node, it's going to be a block device with major of devmapper targets. All devmapper targets will have the same major number. And this number can be defined when loading the module. Then, /dev/mapper/control is a character device with completely different major:minor numbers.

Michal


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