On 11.01.2016 20:07, John Snow wrote:
On 01/11/2016 07:20 AM, Vladimir Sementsov-Ogievskiy wrote:
Are you sure? What about creation\last change dates, file links, user
data, etc?
For now, formally, current "For now, as no extra data is defined,
extra_data_size is reserved and must be zero." is equal to such table,
but provides more flexibility for future..
Oh, I see what you're trying to do.
In this case, perhaps we need a versioning system for the type-specific
data? We won't be able to just add data arbitrarily, we need to change
some field somewhere.
Maybe we can say something like...
"If extra_data_size is 0, there is no type-specific data and the version
of that data layout is 0. If extra_data_size is non-zero, the first byte
of the type-specific-data must be a version number greater than 0 that
indicates the layout of the data to follow.
For the Dirty Tracking bitmap type, only version 0 is currently valid."
This way it's explicit that data *could* show up for dirty tracking in
the future, but currently it does not.
--js
It's ok for me.
--
Best regards,
Vladimir
* now, @virtuozzo.com instead of @parallels.com. Sorry for this inconvenience.
