14/12/2022 03:21, Alexander Kozyrev: > Bring more flexibility and control over both flow rule insertion > and packet matching mechanisms. Introduce 2 new flow table types: > > 1. Allow a user to specify the insertion type used in template tables. > The insertion type is responsible for choosing the appropriate key > value used to map inserted flow rules into a template table. > > Flow rules can be inserted by calculating the hash value for > the pattern or inserted by index via the new create_by_index() API. > The idea of the index-based insertion is to avoid additional matches > and simply execute predefined actions after jumping to the index.
I don't understand the idea. Why is it avoiding additional matches? > The insertion to an already existing index is undefined and Why is it undefined? > depends on PMD implementation. An old rule must be destroyed first. > The index cannot be bigger than the size of the table. > > 2. Allow a user to specify the hash calculation function used in template > tables. The hash calculation type is responsible for the calculation of > the flow rule index a packet would hit upon arrival at the table. > > Control over this is useful for applications with custom RSS algorithms, > for example. An application can select various packet fields to serve as > a hash calculation source and jump to the appropriate flow rule location. > The RSS hash result will be used as the index in the table. For the linear > hash function, the mapping is one-to-one and the hash result is the index. > For other hash functions, the index is the hash result module table size. > The RSS hash result can be retrieved via modify_field API: HASH_RESULT. > > Signed-off-by: Alexander Kozyrev <akozy...@nvidia.com> > --- > doc/guides/prog_guide/rte_flow.rst | 20 +++++++ > lib/ethdev/rte_flow.c | 24 ++++++++ > lib/ethdev/rte_flow.h | 96 ++++++++++++++++++++++++++++++ > lib/ethdev/rte_flow_driver.h | 11 ++++ > lib/ethdev/version.map | 3 + > 5 files changed, 154 insertions(+) Is there a PMD implementation available on the mailing list? This is required to accept a new API.
