Re: [patch 4/5] fail-injection capability for disk IO

Akinobu Mita <[email protected]> writes:
>   * @bio:  The bio describing the location in memory and on the device.
> @@ -3077,6 +3093,9 @@ end_io:
>  		if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
>  			goto end_io;
>  
> +		if (should_fail(fail_make_request, bio->bi_size))
> +			goto end_io;

AFAIK it is reasonably easy to write stacking block drivers.
I think I would prefer a stackable driver instead of this hook.

-Andi
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