[0/2] ublk: Allow more than 64 ublk devices

Message

Mike Christie Oct. 1, 2023, 6:54 p.m. UTC

The following patches were made over Linus's tree. They allow users to
configure the max number of ublk devices. We are currently converting
users from tcmu to ublk so the 64 device limit is too small, because we
have setups that have 512-1k devices.

For the second patch, I've tested up to 4K devices, but was not sure
if we wanted to continue to have an artificical limit or code it so
the limit is based on the code. I did the latter thinking tcmu is
used in some clouds and they will want to convert to ublk like we are,
and they probably have larger limits than we do.