mbox series

[v3,0/7] net/tap: RSS using BPF overhaul

Message ID 20240208175051.326550-1-stephen@networkplumber.org (mailing list archive)
Headers
Series net/tap: RSS using BPF overhaul |

Message

Stephen Hemminger Feb. 8, 2024, 5:41 p.m. UTC 
  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.
The build process checks for the required components
and if not there will stub out to not supported.

This patch series is mostly the same as the original RFC,
most of the changes are to split it up and always build
the BPF from source.

v3 - fix handling of case where libbpf not present and
     therefore the not supported needs to be returned.

Stephen Hemminger (7):
  net/tap: remove unused RSS hash types
  net/tap: validate and setup parameters for BPF RSS
  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
  MAINTAINERS: add maintainer for TAP device

 .gitignore                            |    3 -
 MAINTAINERS                           |    1 +
 drivers/net/tap/bpf/Makefile          |   19 -
 drivers/net/tap/bpf/README            |   12 +
 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       |   81 ++
 drivers/net/tap/bpf/tap_bpf_program.c |  255 ----
 drivers/net/tap/bpf/tap_bpf_program.o |  Bin 0 -> 28080 bytes
 drivers/net/tap/bpf/tap_rss.c         |  272 ++++
 drivers/net/tap/meson.build           |   26 +-
 drivers/net/tap/rte_eth_tap.c         |    2 +
 drivers/net/tap/rte_eth_tap.h         |    9 +-
 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            |  521 +++-----
 drivers/net/tap/tap_flow.h            |   11 +-
 drivers/net/tap/tap_rss.h             |   14 +-
 drivers/net/tap/tap_tcmsgs.h          |    4 +-
 21 files changed, 534 insertions(+), 3165 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_bpf_program.o
 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