[PATCH V3] nvme: enable ro namespace for ZNS without append

[Sagi Grimberg]

>>>> -	if (id->nsattr & NVME_NS_ATTR_RO)
>>>> +	if (id->nsattr & NVME_NS_ATTR_RO || test_bit(NVME_NS_FORCE_RO, &ns->flags))
>>>>    		set_disk_ro(disk, true);
>>>
>>> If the FORCE_RO flag is set, the disk is set to read-only. If that flag
>>> is later cleared, nothing clears the disk's read-only setting.
>>
>> Yea, that is true also for the non-force case, but before it broke
>> BLKROSET so I reverted that. We can use this FORCE_RO for BLKROSET as
>> well I think...
> 
> Let me prioritize the hard r/o setting.  mkp actually has an older patch
> that did just that which I'll resurrect.

Sounds good.