[PATCH v3 1/5] mbuf: clarify meta data needed for Outbound Inline

[Nithin Kumar Dabilpuram]

Ping. Any thoughts on this ?

This is just clarification of existing assumptions for Inline Outbound 
that are being made.


On 2022-08-22 8:08 PM, Nithin Dabilpuram wrote:
> Clarify mbuf meta data needed for Outbound Inline processing.
> Application needs to provide mbuf.l3_len and L3 type in
> mbuf.ol_flags so that like tunnel mode using mbuf.l2_len, transport mode
> can make use of l3_len and l3_type to determine perform
> proper transport mode IPsec processing.
>
> Signed-off-by: Nithin Dabilpuram <ndabilpuram at marvell.com>
> ---
> v3:
> - Addressed comments on patch 4/5 and added acks.
> v2:
> - Modified ipsec-secgw to do ether type update for outbound path.
>
>   doc/guides/nics/features.rst | 2 +-
>   lib/mbuf/rte_mbuf_core.h     | 3 ++-
>   2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
> index 7f6cb91..b4a8e98 100644
> --- a/doc/guides/nics/features.rst
> +++ b/doc/guides/nics/features.rst
> @@ -431,7 +431,7 @@ protocol operations. See security library and PMD documentation for more details
>   
>   * **[uses]       rte_eth_rxconf,rte_eth_rxmode**: ``offloads:RTE_ETH_RX_OFFLOAD_SECURITY``,
>   * **[uses]       rte_eth_txconf,rte_eth_txmode**: ``offloads:RTE_ETH_TX_OFFLOAD_SECURITY``.
> -* **[uses]       mbuf**: ``mbuf.l2_len``.
> +* **[uses]       mbuf**: ``mbuf.l2_len``, ``mbuf.l3_len``, ``mbuf.ol_flags``.
>   * **[implements] rte_security_ops**: ``session_create``, ``session_update``,
>     ``session_stats_get``, ``session_destroy``, ``set_pkt_metadata``, ``get_userdata``,
>     ``capabilities_get``.
> diff --git a/lib/mbuf/rte_mbuf_core.h b/lib/mbuf/rte_mbuf_core.h
> index 3d6ddd6..b62a7c6 100644
> --- a/lib/mbuf/rte_mbuf_core.h
> +++ b/lib/mbuf/rte_mbuf_core.h
> @@ -267,7 +267,8 @@ extern "C" {
>   /**
>    * Request security offload processing on the TX packet.
>    * To use Tx security offload, the user needs to fill l2_len in mbuf
> - * indicating L2 header size and where L3 header starts.
> + * indicating L2 header size and where L3 header starts. Similarly,
> + * l3_len should also be filled along with ol_flags reflecting current L3 type.
>    */
>   #define RTE_MBUF_F_TX_SEC_OFFLOAD	(1ULL << 43)
>   #define PKT_TX_SEC_OFFLOAD RTE_DEPRECATED(PKT_TX_SEC_OFFLOAD) \