Re: [Qemu-devel] [PATCH 0/2] deal with BDRV_BLOCK_RAW

[Vladimir Sementsov-Ogievskiy]

13.08.2019 17:31, Max Reitz wrote:
> On 13.08.19 13:51, Kevin Wolf wrote:
> 
> [...]
> 
>> Hm... This is a mess. :-)
> 
> Just out of curiosity: Why?
> 
> Aren’t there only two things we really need from the block_status
> infrastructure?
> 
> (1) Whether something is allocated in the given layer of the backing chain,
> 
> (2) Whether we know that a given range reads as zeroes.
> 
> Do we really need anything else?
> 

qemu-img map?


1. We need to fix the bug somehow
2. We need to fix comment about different block-status flags, as it really
lacks information of what actually "DATA" means (together with *file).
And what finally means "allocated", can you define it precisely?
3. Fix nbd-server to be closer to NBD spec about block-status

I made several tries to imagine [1] and [2] but never succeeded..


-- 
Best regards,
Vladimir