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

[Christoph Hellwig]

On Tue, Nov 10, 2020 at 05:41:15PM -0800, Sagi Grimberg wrote:
>
>>> -	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.