Re: [PATCH blktests v2 2/2] block/031: allow to run with built-in null_blk driver

[Chaitanya Kulkarni <chaitanyak@nvidia.com>]

On 1/9/24 02:44, Shin'ichiro Kawasaki wrote:
> The test case block/031 sets null_blk parameter shared_tag_bitmap=1 for
> testing. The parameter has been set as a module parameter then null_blk
> driver must be loadable. However, null_blk allows to set
> shared_tag_bitmap as a configfs parameter since the kernel commit
> 7012eef520cb ("null_blk: add configfs variables for 2 options"). Then
> the test case now can be run with built-in null_blk driver by specifying
> shared_tag_bitmap through configfs.
>
> Modify the test case for that purpose. Refer null_blk feature list and
> check if shared_tag_bitmap can be specified through configfs. If so,
> specify the parameter as an option of _configure_null_blk and set it
> through configfs. If not, check in requires() that shared_tag_bitmap can
> be specified as a module parameter. Then call _init_null_blk() in test()
> and specify shared_tag_bitmap=1 at null_blk module load.
>
> Also change null_blk device name from nullb0 to nullb1 since the default
> null_blk device name nullb0 is not usable with built-in null_blk driver.
>
> Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
> ---
>

Looks good.

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>

-ck