[PATCH blktests] nvme/052: wait for namespace removal before recreating namespace

[Nilay Shroff]

On 8/22/24 20:19, Daniel Wagner wrote:
> On Thu, Aug 22, 2024 at 11:59:35AM GMT, Shinichiro Kawasaki wrote:
>> I can agree with this point: it is odd to suppress errors only for the namespace
>> removal case. I did so to catch other potential errors that _find_nvme_ns() may
>> return in the future for the namespace creation case. But still this way misses
>> other potential errors for the namespace removal case. Maybe I was overthinking.
>> Let's simplify the test with just doing
>>
>>    ns=$(_find_nvme_ns "${uuid}" 2>/dev/null)
>>
>> as you suggest. Still the test case can detect the kernel regression, and I
>> think it's good enough. Will reflect this to v2.
> 
> Not sure if this is relevant, but I'd like to see that we return error
> codes so that the caller can actually decide to ignore the failure or
> not.
The _find_nvme_ns(), when fails to find the relevant namespace, it returns 
"empty string" and if it could find namespace then it returns the namespace 
value to the caller. And then caller (in this case nvmf_wait_for_ns()) would 
take action depending on the return value from _find_nvme_ns().

Thanks,
--Nilay