[dpdk-dev] [RFC v2 0/2] ethdev: Enhancements to flow director filter
rahul.lakkireddy at chelsio.com
Mon Jan 11 14:50:53 CET 2016
On Wednesday, December 12/23/15, 2015 at 18:11:19 +0530, Rahul Lakkireddy wrote:
> This RFC series of patches attempt to extend the flow director filter to
> add support for Chelsio T5 hardware filtering capabilities.
> Chelsio T5 supports carrying out filtering in hardware which supports 3
> actions to carry out on a packet which hit a filter viz.
> 1. Action Pass - Packets hitting a filter rule can be directed to a
> particular RXQ.
> 2. Action Drop - Packets hitting a filter rule are dropped in h/w.
> 3. Action Switch - Packets hitting a filter rule can be switched in h/w
> from one port to another, without involvement of host. Also, the
> action Switch also supports rewrite of src-mac/dst-mac headers as
> well as rewrite of vlan headers. It also supports rewrite of IP
> headers and thereby, supports NAT (Network Address Translation)
> in h/w.
> Also, each filter rule can optionally support specifying a mask value
> i.e. it's possible to create a filter rule for an entire subnet of IP
> addresses or a range of tcp/udp ports, etc.
> Patch 1 does the following:
> - Adds an additional flow rte_eth_pkt_filter_flow which encapsulates
> ingress ports, l2 payload, vlan and ntuples.
> - Adds an additional mask for the flow to allow range of values to be
> - Adds an ability to set both filters with masks (Maskfull) and
> without masks (Maskless). Also allow prioritizing one of these
> filter types over the other when a packet matches several types.
> - Adds a new behavior 'switch'.
> - Adds behavior arguments that can be passed when a particular behavior
> is taken. For ex: in case of action 'switch', pass additional 4-tuple
> to allow rewriting src/dst ip and port addresses to support NAT'ing.
> Patch 2 shows testpmd command line example to support packet filter
> The patch series has been compile tested on all x86 gcc targets and the
> current fdir filter supported drivers seem to return appropriate error
> codes when this new flow type and the new action are not supported and
> hence are not affected.
> Posting this series mainly for discussion on API change. Once this is
> agreeable then, I will post the cxgbe PMD changes to use the new API.
> 1. Added ttl to rte_eth_ipv4_flow and tc, flow_label, next_header,
> and hop_limit to rte_eth_ipv6_flow.
> 2. Added new field type to rte_eth_pkt_filter_flow to differentiate
> between maskfull and maskless filter types.
> 3. Added new field prio to rte_eth_pkt_filter_flow to allow setting
> priority over maskfull or maskless when packet matches multiple
> filter types.
> 4. Added new behavior sub op RTE_FDIR_BEHAVIOR_SUB_OP_SWAP to allow
> swapping fields in matched flows. For ex, useful when swapping mac
> addresses in hardware before switching.
> 5. Updated the testpmd example to reflect the above new changes.
> 6. Dropped Patch 3 since the ABI announcement has already been merged.
> Rahul Lakkireddy (2):
> ethdev: add packet filter flow and new behavior switch to fdir
> testpmd: add an example to show packet filter flow
> app/test-pmd/cmdline.c | 528 +++++++++++++++++++++++++++++++++++++++-
> lib/librte_ether/rte_eth_ctrl.h | 127 +++++++++-
> 2 files changed, 646 insertions(+), 9 deletions(-)
Any comments on this RFC series? If the overall approach is fine then,
I'll re-submit it as a PATCH series along with the CXGBE PMD driver
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