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From: David Ahern <dsahern@kernel.org>
To: netdev@vger.kernel.org
Cc: bpf@vger.kernel.org, davem@davemloft.net, kuba@kernel.org,
	brouer@redhat.com, toke@redhat.com, lorenzo@kernel.org,
	daniel@iogearbox.net, john.fastabend@gmail.com, ast@kernel.org,
	kafai@fb.com, songliubraving@fb.com, yhs@fb.com, andriin@fb.com,
	dsahern@gmail.com, David Ahern <dsahern@kernel.org>
Subject: [PATCH v3 bpf-next 0/5] bpf: Add support for XDP programs in DEVMAP entries
Date: Thu, 28 May 2020 23:20:52 -0600	[thread overview]
Message-ID: <20200529052057.69378-1-dsahern@kernel.org> (raw)

Implementation of Daniel's proposal for allowing DEVMAP entries to be
a device index, program fd pair.

Programs are run after XDP_REDIRECT and have access to both Rx device
and Tx device.

v3
- renamed struct to bpf_devmap_val
- used offsetofend to check for expected map size, modification of
  Toke's comment
- check for explicit value sizes
- adjusted switch statement in dev_map_run_prog per Andrii's comment
- changed SEC shortcut to xdp_devmap
- changed selftests to use skeleton and new map declaration

v2
- moved dev_map_ext_val definition to uapi to formalize the API for devmap
  extensions; add bpf_ prefix to the prog_fd and prog_id entries
- changed devmap code to handle struct in a way that it can support future
  extensions
- fixed subject in libbpf patch

v1
- fixed prog put on invalid program - Toke
- changed write value from id to fd per Toke's comments about capabilities
- add test cases

David Ahern (5):
  devmap: Formalize map value as a named struct
  bpf: Add support to attach bpf program to a devmap entry
  xdp: Add xdp_txq_info to xdp_buff
  libbpf: Add SEC name for xdp programs attached to device map
  selftest: Add tests for XDP programs in devmap entries

 include/linux/bpf.h                           |   5 +
 include/net/xdp.h                             |   5 +
 include/uapi/linux/bpf.h                      |  12 ++
 kernel/bpf/devmap.c                           | 121 +++++++++++++++---
 net/core/dev.c                                |  18 +++
 net/core/filter.c                             |  17 +++
 tools/include/uapi/linux/bpf.h                |  12 ++
 tools/lib/bpf/libbpf.c                        |   2 +
 .../bpf/prog_tests/xdp_devmap_attach.c        |  89 +++++++++++++
 .../bpf/progs/test_xdp_devmap_helpers.c       |  22 ++++
 .../bpf/progs/test_xdp_with_devmap_helpers.c  |  43 +++++++
 11 files changed, 328 insertions(+), 18 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_devmap_attach.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_devmap_helpers.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_with_devmap_helpers.c

-- 
2.21.1 (Apple Git-122.3)


             reply	other threads:[~2020-05-29  5:21 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-29  5:20 David Ahern [this message]
2020-05-29  5:20 ` [PATCH v3 bpf-next 1/5] devmap: Formalize map value as a named struct David Ahern
2020-05-29  8:22   ` Jesper Dangaard Brouer
2020-05-29 15:36     ` David Ahern
2020-05-29 16:02       ` Jesper Dangaard Brouer
2020-05-29  5:20 ` [PATCH v3 bpf-next 2/5] bpf: Add support to attach bpf program to a devmap entry David Ahern
2020-05-29  5:20 ` [PATCH v3 bpf-next 3/5] xdp: Add xdp_txq_info to xdp_buff David Ahern
2020-05-29  5:20 ` [PATCH v3 bpf-next 4/5] libbpf: Add SEC name for xdp programs attached to device map David Ahern
2020-05-29  5:20 ` [PATCH v3 bpf-next 5/5] selftest: Add tests for XDP programs in devmap entries David Ahern
2020-05-29 16:45   ` Toke Høiland-Jørgensen
2020-05-29 16:48     ` David Ahern
2020-05-29 16:58       ` Toke Høiland-Jørgensen
2020-05-29 16:46 ` [PATCH v3 bpf-next 0/5] bpf: Add support for XDP programs in DEVMAP entries Toke Høiland-Jørgensen

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