Re: [PATCH v7 08/14] nvmet-core: allow one host per passthru-ctrl

From: Sagi Grimberg
Date: Wed Aug 21 2019 - 20:09:41 EST

I don't understand why we don't limit a regular ctrl to single access and we do it for the PT ctrl.

I guess the block layer helps to sync between multiple access in parallel but we can do it as well.

Also, let's say you limit the access to this subsystem to 1 user, the bdev is still accessibly for local user and also you can create a different subsystem that will use this device (PT and non-PT ctrl).


can you explain the trouble you meant and how this limitation solve it ?

Its different to emulate the controller with all its admin
commands vs. passing it through to the nvme device.. (think of format nvm)