[PATCH v10 02/11] ethdev: add flow item/action templates

[Andrew Rybchenko]

On 2/23/22 06:02, Alexander Kozyrev wrote:
> Treating every single flow rule as a completely independent and separate
> entity negatively impacts the flow rules insertion rate. Oftentimes in an
> application, many flow rules share a common structure (the same item mask
> and/or action list) so they can be grouped and classified together.
> This knowledge may be used as a source of optimization by a PMD/HW.
> 
> The pattern template defines common matching fields (the item mask) without
> values. The actions template holds a list of action types that will be used
> together in the same rule. The specific values for items and actions will
> be given only during the rule creation.
> 
> A table combines pattern and actions templates along with shared flow rule
> attributes (group ID, priority and traffic direction). This way a PMD/HW
> can prepare all the resources needed for efficient flow rules creation in
> the datapath. To avoid any hiccups due to memory reallocation, the maximum
> number of flow rules is defined at the table creation time.
> 
> The flow rule creation is done by selecting a table, a pattern template
> and an actions template (which are bound to the table), and setting unique
> values for the items and actions.
> 
> Signed-off-by: Alexander Kozyrev <akozyrev at nvidia.com>
> Acked-by: Ori Kam <orika at nvidia.com>

Acked-by: Andrew Rybchenko <andrew.rybchenko at oktetlabs.ru>