[PATCH v3 19/30] null_blk: Introduce fua attribute

[Bart Van Assche]

On 3/27/24 5:43 PM, Damien Le Moal wrote:
> Add the fua configfs attribute and module parameter to allow
> configuring if the device supports FUA or not. Using this attribute
> has an effect on the null_blk device only if memory backing is enabled
> together with a write cache (cache_size option).
> 
> This new attribute allows configuring a null_blk device with a write
> cache but without FUA support. This is convenient to test the block
> layer flush machinery.

Reviewed-by: Bart Van Assche <bvanassche at acm.org>