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

[Pavel Emelyanov]

On 01/12/2016 01:08 PM, Cyrill Gorcunov wrote:
> On Tue, Jan 12, 2016 at 12:56:16PM +0400, Nikita Spiridonov wrote:
> ...
>>
>> Which images concretely we have to update?
> 
> All images where /dev/ploopXXX may be present. In particular
> reg-files, inotify.
> 
>> And do we really need CRIT utility or protobuf API can be used to fix
>> images?
> 
> CRIT I believe is more convenient. Pavel mentioned "recode" feature he
> has in mind for such actions.
> 
> Pavel, could you please join the conversation?

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.

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.

-- Pavel