Re: [Lsf-pc] [LSF/MM TOPIC] Unifying the LIO and SCST target drivers

[Bart Van Assche <bart.vanassche@sandisk.com>]

On 02/27/15 22:58, Nicholas A. Bellinger wrote:
> Looking at how your attempting to drive creation + removal of struct
> config_group from within kernel code here:
> 
> target: Add target port registration API
> https://github.com/bvanassche/linux/commit/dbb8bf32db3428ede6ecc688ede1e5e01fc59d88
> 
> is the exactly the wrong approach to take.
> 
> The creation and deletion of struct config_group must be driven by
> user-space, and by user-space only.  No exceptions will be made.

There exists an approach that preserves the ABI of both SCST and LIO,
namely:
* Add empty transport_register_wwn() and transport_unregister_wwn()
  functions in the LIO core.
* Add calls to these functions at the appropriate place in the FC
  and SRP target drivers.
* In the SCST implementation of the unified target driver API, route
  calls to transport_register_wwn() and transport_unregister_wwn() to
  scst_register_target() and scst_unregister_target() respectively.

Bart.