[dpdk-dev] [PATCH v8 2/2] ethdev: move egress metadata to dynamic field

[Olivier Matz]

On Thu, Oct 31, 2019 at 04:48:26PM +0000, Viacheslav Ovsiienko wrote:
> The dynamic mbuf fields were introduced by [1]. The egress metadata is
> good candidate to be moved from statically allocated field tx_metadata to
> dynamic one. Because mbufs are used in half-duplex fashion only, it is
> safe to share this dynamic field with ingress metadata.
> 
> The shared dynamic field contains either egress (if application going to
> transmit mbuf with tx_burst) or ingress (if mbuf is received with rx_burst)
> metadata and can be accessed by RTE_FLOW_DYNF_METADATA() macro or with
> rte_flow_dynf_metadata_set() and rte_flow_dynf_metadata_get() helper
> routines. PKT_TX_DYNF_METADATA/PKT_RX_DYNF_METADATA flag will be set
> along with the data.
> 
> The mbuf dynamic field must be registered by calling
> rte_flow_dynf_metadata_register() prior accessing the data.
> 
> The availability of dynamic mbuf metadata field can be checked with
> rte_flow_dynf_metadata_avail() routine.
> 
> DEV_TX_OFFLOAD_MATCH_METADATA offload and configuration flag is removed.
> The metadata support in PMDs is engaged on dynamic field registration.
> 
> Metadata feature is getting complex. We might have some set of actions
> and items that might be supported by PMDs in multiple combinations,
> the supported values and masks are the subjects to query by perfroming
> trials (with rte_flow_validate).
> 
> [1] http://patches.dpdk.org/patch/62040/
> 
> Signed-off-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>
> Acked-by: Ori Kam <orika at mellanox.com>

Acked-by: Olivier Matz <olivier.matz at 6wind.com>