[PATCH v13 00/11] net/tap: make RSS work again

[Stephen Hemminger]

The support of doing RSS for rte_flow_action was a cool idea
but it has been broken for several releases of DPDK as the
underlying kernel and BPF infrastructure changed.

This series cleans up the BPF program, implements several
features that were never completed in the original code
and changes to use the current BPF tool chain.

The result should be easier to read and maintain. I do not
intend to support backporting this to stable releases due
to lack of demand and dealing with older distros.

v13 - Incorporate review feedback.
      Drop change to statistics and queue full handling;
      these will get fixed in another series.

Stephen Hemminger (11):
  net/tap: fix fd check in flow_isolate
  net/tap: do not duplicate fd's
  net/tap: remove unused fields
  net/tap: validate and setup parameters for BPF RSS
  net/tap: do not build flow support if header is out of date
  net/tap: rewrite the RSS BPF program
  net/tap: use libbpf to load new BPF program
  net/tap: remove no longer used files
  net/tap: simplify internals
  net/tap: remove extraneous newlines
  net/tap: update documentation

 .gitignore                             |    3 -
 doc/guides/nics/tap.rst                |  274 ++--
 doc/guides/rel_notes/release_24_07.rst |    7 +
 drivers/net/tap/bpf/Makefile           |   19 -
 drivers/net/tap/bpf/README             |   49 +
 drivers/net/tap/bpf/bpf_api.h          |  276 ----
 drivers/net/tap/bpf/bpf_elf.h          |   53 -
 drivers/net/tap/bpf/bpf_extract.py     |   86 --
 drivers/net/tap/bpf/meson.build        |  107 ++
 drivers/net/tap/bpf/tap_bpf_program.c  |  255 ----
 drivers/net/tap/bpf/tap_rss.c          |  267 ++++
 drivers/net/tap/meson.build            |   42 +-
 drivers/net/tap/rte_eth_tap.c          |  373 +++--
 drivers/net/tap/rte_eth_tap.h          |   42 +-
 drivers/net/tap/tap_bpf.h              |  121 --
 drivers/net/tap/tap_bpf_api.c          |  190 ---
 drivers/net/tap/tap_bpf_insns.h        | 1743 ------------------------
 drivers/net/tap/tap_flow.c             |  565 +++-----
 drivers/net/tap/tap_flow.h             |   17 +-
 drivers/net/tap/tap_intr.c             |    7 +-
 drivers/net/tap/tap_rss.h              |   21 +-
 drivers/net/tap/tap_tcmsgs.h           |    4 +-
 22 files changed, 909 insertions(+), 3612 deletions(-)
 delete mode 100644 drivers/net/tap/bpf/Makefile
 create mode 100644 drivers/net/tap/bpf/README
 delete mode 100644 drivers/net/tap/bpf/bpf_api.h
 delete mode 100644 drivers/net/tap/bpf/bpf_elf.h
 delete mode 100644 drivers/net/tap/bpf/bpf_extract.py
 create mode 100644 drivers/net/tap/bpf/meson.build
 delete mode 100644 drivers/net/tap/bpf/tap_bpf_program.c
 create mode 100644 drivers/net/tap/bpf/tap_rss.c
 delete mode 100644 drivers/net/tap/tap_bpf.h
 delete mode 100644 drivers/net/tap/tap_bpf_api.c
 delete mode 100644 drivers/net/tap/tap_bpf_insns.h

-- 
2.43.0