Add bpf programmable device

From:		Daniel Borkmann <daniel-AT-iogearbox.net>
To:		bpf-AT-vger.kernel.org
Subject:		[PATCH bpf-next 0/8] Add bpf programmable device
Date:		Tue, 26 Sep 2023 07:59:05 +0200
Message-ID:		<20230926055913.9859-1-daniel@iogearbox.net>
Cc:		netdev-AT-vger.kernel.org, martin.lau-AT-kernel.org, razor-AT-blackwall.org, ast-AT-kernel.org, andrii-AT-kernel.org, john.fastabend-AT-gmail.com, Daniel Borkmann <daniel-AT-iogearbox.net>
Archive-link:		Article

This work adds a BPF programmable device which can operate in L3 or L2
mode where the BPF program is part of the xmit routine. It's program
management is done via bpf_mprog and it comes with BPF link support.
For details see patch 1 and following. Thanks!

Daniel Borkmann (8):
  meta, bpf: Add bpf programmable meta device
  meta, bpf: Add bpf link support for meta device
  tools: Sync if_link uapi header
  libbpf: Add link-based API for meta
  bpftool: Implement link show support for meta
  bpftool: Extend net dump with meta progs
  selftests/bpf: Add netlink helper library
  selftests/bpf: Add selftests for meta

 MAINTAINERS                                   |   9 +
 drivers/net/Kconfig                           |   9 +
 drivers/net/Makefile                          |   1 +
 drivers/net/meta.c                            | 943 ++++++++++++++++++
 include/linux/netdevice.h                     |   2 +
 include/net/meta.h                            |  38 +
 include/uapi/linux/bpf.h                      |  13 +
 include/uapi/linux/if_link.h                  |  25 +
 kernel/bpf/syscall.c                          |  30 +-
 .../bpf/bpftool/Documentation/bpftool-net.rst |   8 +-
 tools/bpf/bpftool/link.c                      |   7 +
 tools/bpf/bpftool/net.c                       |   7 +-
 tools/include/uapi/linux/bpf.h                |  13 +
 tools/include/uapi/linux/if_link.h            | 142 +++
 tools/lib/bpf/bpf.c                           |  16 +
 tools/lib/bpf/bpf.h                           |   5 +
 tools/lib/bpf/libbpf.c                        |  61 +-
 tools/lib/bpf/libbpf.h                        |  15 +
 tools/lib/bpf/libbpf.map                      |   1 +
 tools/testing/selftests/bpf/Makefile          |  19 +-
 tools/testing/selftests/bpf/config            |   1 +
 tools/testing/selftests/bpf/netlink_helpers.c | 358 +++++++
 tools/testing/selftests/bpf/netlink_helpers.h |  46 +
 .../selftests/bpf/prog_tests/tc_helpers.h     |   4 +
 .../selftests/bpf/prog_tests/tc_meta.c        | 650 ++++++++++++
 .../selftests/bpf/progs/test_tc_link.c        |  13 +
 26 files changed, 2415 insertions(+), 21 deletions(-)
 create mode 100644 drivers/net/meta.c
 create mode 100644 include/net/meta.h
 create mode 100644 tools/testing/selftests/bpf/netlink_helpers.c
 create mode 100644 tools/testing/selftests/bpf/netlink_helpers.h
 create mode 100644 tools/testing/selftests/bpf/prog_tests/tc_meta.c

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2.34.1