[PATCH v6 0/8] net/tap: cleanup and fix BPF flow support

[Stephen Hemminger <stephen@networkplumber.org>]

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.

v6 - don't build if missing TC flower, a kernel that
     old is not supported. But somebody will try.

     Use BPF CO:RE attribute wrapper to avoid kernel
     header skew.

Stephen Hemminger (8):
  net/tap: do not duplicate fd's
  doc: fix the requirements and building of TAP flow
  net/tap: remove unused fields
  net/tap: validate and setup parameters for BPF RSS
  net/tap: stop "vendoring" linux bpf headers
  net/tap: rewrite the RSS BPF program
  net/tap: use libbpf to load new BPF program
  net/tap: remove no longer used files

 .gitignore                            |    3 -
 doc/guides/linux_gsg/sys_reqs.rst     |    3 +
 doc/guides/nics/tap.rst               |   95 +-
 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       |  107 ++
 drivers/net/tap/bpf/tap_bpf_program.c |  255 ----
 drivers/net/tap/bpf/tap_rss.c         |  267 ++++
 drivers/net/tap/meson.build           |   39 +-
 drivers/net/tap/rte_eth_tap.c         |  199 ++-
 drivers/net/tap/rte_eth_tap.h         |   17 +-
 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, 710 insertions(+), 3399 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