On Mon, Nov 02, 2020 at 10:33:55AM -0800, Keith Busch wrote: > I can see this going one of two ways: > > a) Set up the existing controller character device with a generic > disk-less request_queue to the IO queues accepting IO commands to > arbitrary NSIDs. > > b) Each namespace that can't be supported gets their own character > device. > > I'm leaning toward option "a". While it doesn't create handles to unique > namespaces, it has more resilience to potentially future changes. And I > recall the target side had a potential use for that, too. The problem with a) is that it can't be used to give users or groups access to just one namespaces, so it causes a real access control nightmare. The problem with b) is that now applications will break when we add support for new command sets or features. I think c) Each namespace gets its own character device, period. is the only sensible option.
