Re: [PATCH 1/3] ethdev: add actions to modify TCP header fields

[Dekel Peled <dekelp@mellanox.com>]

Hi Adrien, 

Can you please review?
I'll appreciate receiving any comments soon.

Thanks,
Dekel

> -----Original Message-----
> From: Dekel Peled <dekelp@mellanox.com>
> Sent: Thursday, March 21, 2019 4:19 PM
> To: Adrien Mazarguil <adrien.mazarguil@6wind.com>;
> wenzhuo.lu@intel.com; jingjing.wu@intel.com;
> bernard.iremonger@intel.com; Yongseok Koh <yskoh@mellanox.com>;
> Shahaf Shuler <shahafs@mellanox.com>
> Cc: dev@dpdk.org; Ori Kam <orika@mellanox.com>; Dekel Peled
> <dekelp@mellanox.com>
> Subject: [PATCH 1/3] ethdev: add actions to modify TCP header fields
> 
> Add actions:
> - INC_TCP_SEQ - Increase sequence number in the outermost TCP header.
> - DEC_TCP_SEQ - Decrease sequence number in the outermost TCP header.
> - INC_TCP_ACK - Increase acknowledgment number in the outermost TCP
> 		header.
> - DEC_TCP_ACK - Decrease acknowledgment number in the outermost TCP
> 		header.
> 
> Original work by Xiaoyu Min.
> 
> Signed-off-by: Dekel Peled <dekelp@mellanox.com>
> ---
>  doc/guides/prog_guide/rte_flow.rst | 72
> ++++++++++++++++++++++++++++++++++++++
>  lib/librte_ethdev/rte_flow.c       |  8 +++++
>  lib/librte_ethdev/rte_flow.h       | 60
> +++++++++++++++++++++++++++++++
>  3 files changed, 140 insertions(+)
> 
> diff --git a/doc/guides/prog_guide/rte_flow.rst
> b/doc/guides/prog_guide/rte_flow.rst
> index 0203f4f..bdb817a 100644
> --- a/doc/guides/prog_guide/rte_flow.rst
> +++ b/doc/guides/prog_guide/rte_flow.rst
> @@ -2345,6 +2345,78 @@ Otherwise, RTE_FLOW_ERROR_TYPE_ACTION
> error will be returned.
>     | ``mac_addr`` | MAC address   |
>     +--------------+---------------+
> 
> +Action: ``INC_TCP_SEQ``
> +^^^^^^^^^^^^^^^^^^^^^^^
> +
> +Increase sequence number in the outermost TCP header.
> +
> +It must be used with a valid RTE_FLOW_ITEM_TYPE_TCP flow pattern item.
> +Otherwise, RTE_FLOW_ERROR_TYPE_ACTION error will be returned.
> +
> +.. _table_rte_flow_action_inc_tcp_seq:
> +
> +.. table:: INC_TCP_SEQ
> +
> +   +-----------+--------------------------------------------+
> +   | Field     | Value                                      |
> +
> +===========+============================================+
> +   | ``value`` | Value to increase TCP sequence number by   |
> +   +-----------+--------------------------------------------+
> +
> +Action: ``DEC_TCP_SEQ``
> +^^^^^^^^^^^^^^^^^^^^^^^
> +
> +Decrease sequence number in the outermost TCP header.
> +
> +It must be used with a valid RTE_FLOW_ITEM_TYPE_TCP flow pattern item.
> +Otherwise, RTE_FLOW_ERROR_TYPE_ACTION error will be returned.
> +
> +.. _table_rte_flow_action_dec_tcp_seq:
> +
> +.. table:: DEC_TCP_SEQ
> +
> +   +-----------+--------------------------------------------+
> +   | Field     | Value                                      |
> +
> +===========+============================================+
> +   | ``value`` | Value to decrease TCP sequence number by   |
> +   +-----------+--------------------------------------------+
> +
> +Action: ``INC_TCP_ACK``
> +^^^^^^^^^^^^^^^^^^^^^^^
> +
> +Increase acknowledgment number in the outermost TCP header.
> +
> +It must be used with a valid RTE_FLOW_ITEM_TYPE_TCP flow pattern item.
> +Otherwise, RTE_FLOW_ERROR_TYPE_ACTION error will be returned.
> +
> +.. _table_rte_flow_action_inc_tcp_ack:
> +
> +.. table:: INC_TCP_ACK
> +
> +   +-----------+--------------------------------------------------+
> +   | Field     | Value                                            |
> +
> +===========+=============================================
> =====+
> +   | ``value`` | Value to increase TCP acknowledgment number by   |
> +   +-----------+--------------------------------------------------+
> +
> +Action: ``DEC_TCP_ACK``
> +^^^^^^^^^^^^^^^^^^^^^^^
> +
> +Decrease acknowledgment number in the outermost TCP header.
> +
> +It must be used with a valid RTE_FLOW_ITEM_TYPE_TCP flow pattern item.
> +Otherwise, RTE_FLOW_ERROR_TYPE_ACTION error will be returned.
> +
> +.. _table_rte_flow_action_dec_tcp_ack:
> +
> +.. table:: DEC_TCP_ACK
> +
> +   +-----------+--------------------------------------------------+
> +   | Field     | Value                                            |
> +
> +===========+=============================================
> =====+
> +   | ``value`` | Value to decrease TCP acknowledgment number by   |
> +   +-----------+--------------------------------------------------+
> +
>  Negative types
>  ~~~~~~~~~~~~~~
> 
> diff --git a/lib/librte_ethdev/rte_flow.c b/lib/librte_ethdev/rte_flow.c index
> 3277be1..589d0b9 100644
> --- a/lib/librte_ethdev/rte_flow.c
> +++ b/lib/librte_ethdev/rte_flow.c
> @@ -143,6 +143,14 @@ struct rte_flow_desc_data {
>  	MK_FLOW_ACTION(SET_TTL, sizeof(struct rte_flow_action_set_ttl)),
>  	MK_FLOW_ACTION(SET_MAC_SRC, sizeof(struct
> rte_flow_action_set_mac)),
>  	MK_FLOW_ACTION(SET_MAC_DST, sizeof(struct
> rte_flow_action_set_mac)),
> +	MK_FLOW_ACTION(INC_TCP_SEQ,
> +			sizeof(struct rte_flow_action_modify_tcp_seq)),
> +	MK_FLOW_ACTION(DEC_TCP_SEQ,
> +			sizeof(struct rte_flow_action_modify_tcp_seq)),
> +	MK_FLOW_ACTION(INC_TCP_ACK,
> +			sizeof(struct rte_flow_action_modify_tcp_ack)),
> +	MK_FLOW_ACTION(DEC_TCP_ACK,
> +			sizeof(struct rte_flow_action_modify_tcp_ack)),
>  };
> 
>  static int
> diff --git a/lib/librte_ethdev/rte_flow.h b/lib/librte_ethdev/rte_flow.h index
> c0fe879..74cd03e 100644
> --- a/lib/librte_ethdev/rte_flow.h
> +++ b/lib/librte_ethdev/rte_flow.h
> @@ -1651,6 +1651,46 @@ enum rte_flow_action_type {
>  	 * See struct rte_flow_action_set_mac.
>  	 */
>  	RTE_FLOW_ACTION_TYPE_SET_MAC_DST,
> +
> +	/**
> +	 * Increase sequence number in the outermost TCP header.
> +	 *
> +	 * If flow pattern does not define a valid
> RTE_FLOW_ITEM_TYPE_TCP,
> +	 * the PMD should return a RTE_FLOW_ERROR_TYPE_ACTION error.
> +	 *
> +	 * See struct rte_flow_action_modify_tcp_seq
> +	 */
> +	RTE_FLOW_ACTION_TYPE_INC_TCP_SEQ,
> +
> +	/**
> +	 * Decrease sequence number in the outermost TCP header.
> +	 *
> +	 * If flow pattern does not define a valid
> RTE_FLOW_ITEM_TYPE_TCP,
> +	 * the PMD should return a RTE_FLOW_ERROR_TYPE_ACTION error.
> +	 *
> +	 * See struct rte_flow_action_modify_tcp_seq
> +	 */
> +	RTE_FLOW_ACTION_TYPE_DEC_TCP_SEQ,
> +
> +	/**
> +	 * Increase acknowledgment number in the outermost TCP header.
> +	 *
> +	 * If flow pattern does not define a valid
> RTE_FLOW_ITEM_TYPE_TCP,
> +	 * the PMD should return a RTE_FLOW_ERROR_TYPE_ACTION error.
> +	 *
> +	 * See struct rte_flow_action_modify_tcp_ack
> +	 */
> +	RTE_FLOW_ACTION_TYPE_INC_TCP_ACK,
> +
> +	/**
> +	 * Decrease acknowledgment number in the outermost TCP header.
> +	 *
> +	 * If flow pattern does not define a valid
> RTE_FLOW_ITEM_TYPE_TCP,
> +	 * the PMD should return a RTE_FLOW_ERROR_TYPE_ACTION error.
> +	 *
> +	 * See struct rte_flow_action_modify_tcp_ack
> +	 */
> +	RTE_FLOW_ACTION_TYPE_DEC_TCP_ACK,
>  };
> 
>  /**
> @@ -2122,6 +2162,26 @@ struct rte_flow_action_set_mac {
>  	uint8_t mac_addr[ETHER_ADDR_LEN];
>  };
> 
> +/**
> + * RTE_FLOW_ACTION_TYPE_INC_TCP_SEQ
> + * RTE_FLOW_ACTION_TYPE_DEC_TCP_SEQ
> + *
> + * Increase/Decrease outermost TCP's sequence number  */ struct
> +rte_flow_action_modify_tcp_seq {
> +	rte_be32_t value;
> +};
> +
> +/**
> + * RTE_FLOW_ACTION_TYPE_INC_TCP_ACK
> + * RTE_FLOW_ACTION_TYPE_DEC_TCP_ACK
> + *
> + * Increase/Decrease TCP's acknowledgment number.
> + */
> +struct rte_flow_action_modify_tcp_ack {
> +	rte_be32_t value;
> +};
> +
>  /*
>   * Definition of a single action.
>   *
> --
> 1.8.3.1