[PATCH v7 0/8] net/tap: cleanups and fix BPF support

[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
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 toolchain.

The result should be easier to read and maintain.

v7 - use BPF CO:RE to handle build vs runtime in skb offsets. 
   - update documentation
   - workaround for older distributions where support for
     TC flower won't work. No flower == No flow support

Stephen Hemminger (8):
  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  net/tap: do not build flow support if header is out of date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
  doc: update documentation of TAP PMD

 .gitignore                            |    3 -
 doc/guides/linux_gsg/sys_reqs.rst     |    3 +
 doc/guides/nics/tap.rst               |  268 +---
 drivers/net/tap/bpf/Makefile          |   19 -
 drivers/net/tap/bpf/README            |   38 +
 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       |  109 ++
 drivers/net/tap/bpf/tap_bpf_program.c |  255 ----
 drivers/net/tap/bpf/tap_rss.c         |  267 ++++
 drivers/net/tap/meson.build           |   40 +-
 drivers/net/tap/rte_eth_tap.c         |  225 ++--
 drivers/net/tap/rte_eth_tap.h         |   20 +-
 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            |  549 ++------
 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, 786 insertions(+), 3528 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