[Devel] [Q] migrating inotify assigned on ploop device

[Pavel Emelyanov]

On 01/12/2016 01:16 PM, Cyrill Gorcunov wrote:
> On Tue, Jan 12, 2016 at 01:12:04PM +0300, Pavel Emelyanov wrote:
>>
>> Easily.
>>
>> One cannot just use protobuf API, as criu images are slightly more
>> that protobuf. What I propose is the recode action for crit, that
>> would open an image, decode it, apply changes specified in command
>> line (exact syntax is TBD) and write them out modified.
> 
> This sounds good but I see at least one problem (for native C/R case)
> 
> - suspend container
> - ploop changed
> - start restore
> - recode images
> - do restore
> - restore fails and we have only modified images with former ploop name
>   mangled

Plz read my last chapter:

> Should we work on images copy instead? Which gonna be horrible design :)
> 
>>
>> On restore we need to patch criu to spawn crit with recode action and
>> necessary recode rules. CRIT then would read data from images and write
>> them back to criu via pipe.

crit writes modified data into pipe that goes to criu instead of opened
image fd.

-- Pavel