On 11/24/2021 3:37 PM, Viacheslav Ovsiienko wrote:
The generic RTE_FLOW_ACTION_TYPE_MODIFY_FIELD action was
introduced by [1]. This action provides an unified way
to perform various arithmetic and transfer operations over
packet network header fields and packet metadata.
[1] commit 641dbe4fb053 ("net/mlx5: support modify field flow action")
On other side there are a bunch of multiple legacy actions,
that can be superseded by the generic modify field action:
RTE_FLOW_ACTION_TYPE_OF_SET_MPLS_TTL
RTE_FLOW_ACTION_TYPE_OF_DEC_MPLS_TTL
RTE_FLOW_ACTION_TYPE_OF_SET_NW_TTL
RTE_FLOW_ACTION_TYPE_OF_DEC_NW_TTL sfc
RTE_FLOW_ACTION_TYPE_OF_COPY_TTL_OUT
RTE_FLOW_ACTION_TYPE_OF_COPY_TTL_IN
RTE_FLOW_ACTION_TYPE_SET_IPV4_SRC bnxt, cxgbe, mlx5
RTE_FLOW_ACTION_TYPE_SET_IPV4_DST bnxt, cxgbe, mlx5
RTE_FLOW_ACTION_TYPE_SET_IPV6_SRC cxgbe, mlx5
RTE_FLOW_ACTION_TYPE_SET_IPV6_DST cxgbe, mlx5
RTE_FLOW_ACTION_TYPE_SET_TP_SRC cxgbe, mlx5
RTE_FLOW_ACTION_TYPE_SET_TP_DST cxgbe, mlx5
RTE_FLOW_ACTION_TYPE_DEC_TTL mlx5, sfc
RTE_FLOW_ACTION_TYPE_SET_TTL mlx5
RTE_FLOW_ACTION_TYPE_SET_MAC_SRC cxgbe, mlx5
RTE_FLOW_ACTION_TYPE_SET_MAC_DST cxgbe, mlx5
RTE_FLOW_ACTION_TYPE_INC_TCP_SEQ mlx5
RTE_FLOW_ACTION_TYPE_DEC_TCP_SEQ mlx5
RTE_FLOW_ACTION_TYPE_INC_TCP_ACK mlx5
RTE_FLOW_ACTION_TYPE_DEC_TCP_ACK mlx5
RTE_FLOW_ACTION_TYPE_SET_IPV4_DSCP mlx5
RTE_FLOW_ACTION_TYPE_SET_IPV6_DSCP mlx5
RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID bnxt, cnxk, cxgbe, enic,
mlx5, octeontx2, sfc
RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP bnxt, cnxk, cxgbe, enic,
mlx5, octeontx2, sfc
RTE_FLOW_ACTION_TYPE_SET_TAG mlx5
RTE_FLOW_ACTION_TYPE_SET_META mlx5
This note deprecates the following RTE Flow actions:
1. As not supported by any of PMDs:
RTE_FLOW_ACTION_TYPE_OF_SET_MPLS_TTL
RTE_FLOW_ACTION_TYPE_OF_DEC_MPLS_TTL
RTE_FLOW_ACTION_TYPE_OF_SET_NW_TTL
RTE_FLOW_ACTION_TYPE_OF_COPY_TTL_OUT
RTE_FLOW_ACTION_TYPE_OF_COPY_TTL_IN
2. As supposed to be replaced by generig field modify action:
RTE_FLOW_ACTION_TYPE_OF_DEC_NW_TTL
RTE_FLOW_ACTION_TYPE_SET_IPV4_SRC
RTE_FLOW_ACTION_TYPE_SET_IPV4_DST
RTE_FLOW_ACTION_TYPE_SET_IPV6_SRC
RTE_FLOW_ACTION_TYPE_SET_IPV6_DST
RTE_FLOW_ACTION_TYPE_SET_TP_SRC
RTE_FLOW_ACTION_TYPE_SET_TP_DST
RTE_FLOW_ACTION_TYPE_DEC_TTL
RTE_FLOW_ACTION_TYPE_SET_TTL
RTE_FLOW_ACTION_TYPE_SET_MAC_SRC
RTE_FLOW_ACTION_TYPE_SET_MAC_DST
RTE_FLOW_ACTION_TYPE_INC_TCP_SEQ
RTE_FLOW_ACTION_TYPE_DEC_TCP_SEQ
RTE_FLOW_ACTION_TYPE_INC_TCP_ACK
RTE_FLOW_ACTION_TYPE_DEC_TCP_ACK
RTE_FLOW_ACTION_TYPE_SET_IPV4_DSCP
RTE_FLOW_ACTION_TYPE_SET_IPV6_DSCP
RTE_FLOW_ACTION_TYPE_SET_TAG
RTE_FLOW_ACTION_TYPE_SET_META
The VLAN set actions are interrelated to VLAN header insertion/removal
and supported by multiple PMDs and supposed to be just deprecated but
not be removed in 22.11.
Why not remove them for v22.11? Do you think PMDs can't change the
existing implementation until 22.11?
Signed-off-by: Viacheslav Ovsiienko <viachesl...@nvidia.com>
--
v2 - deprecation.rst is updated
v3 - doc comments addressed
- commit message comments addressed
- SET_VLAN_VID and SET_VLAN_PCP actions deprecated, but will not
be removed in 22.11
Deprecated symbols are to prevent new code using them, but for this case
there is no alternative, since PMDs still don't support
'RTE_FLOW_ACTION_TYPE_MODIFY_FIELD' yet.
This patch is forcing users to use deprecated actions (except from mlx).
What about a slight change:
1- In this release, update header/document as
'RTE_FLOW_ACTION_TYPE_MODIFY_FIELD'
is preferred way if supported. Instead of deprecating old ones.
2- Have an agreement with PMD maintainers to switch to new action before v22.11,
and don't accept old action implementation in PMDs anymore.
Based on agreement update 'deprecation.rst' in this release to note that
old actions will be removed on v22.11.
(It would be good to have a check to prevent old actions merged during that
time.)
3- In v22.11, remove old actions, the PMDs that don't support MODIFY_FIELD
action will lose the feature.
What do you think?
Andrew, Ajit, Somnath, Rahul,
We need your confirmation for item (2) above, do you have any objection?
