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* [PATCH bpf-next 0/4] XDP: Support atomic replacement of XDP interface attachments
@ 2020-03-19 13:13 Toke Høiland-Jørgensen
  2020-03-19 13:13 ` [PATCH bpf-next 1/4] xdp: Support specifying expected existing program when attaching XDP Toke Høiland-Jørgensen
                   ` (3 more replies)
  0 siblings, 4 replies; 120+ messages in thread
From: Toke Høiland-Jørgensen @ 2020-03-19 13:13 UTC (permalink / raw)
  To: Alexei Starovoitov
  Cc: Daniel Borkmann, Martin KaFai Lau, Song Liu, Yonghong Song,
	Andrii Nakryiko, David S. Miller, Jakub Kicinski,
	Jesper Dangaard Brouer, John Fastabend, Lorenz Bauer,
	Andrey Ignatov, netdev, bpf

This series adds support for atomically replacing the XDP program loaded on an
interface. This is achieved by means of a new netlink attribute that can specify
the expected previous program to replace on the interface. If set, the kernel
will compare this "expected fd" attribute with the program currently loaded on
the interface, and reject the operation if it does not match.

With this primitive, userspace applications can avoid stepping on each other's
toes when simultaneously updating the loaded XDP program.

---

Toke Høiland-Jørgensen (4):
      xdp: Support specifying expected existing program when attaching XDP
      tools: Add EXPECTED_FD-related definitions in if_link.h
      libbpf: Add function to set link XDP fd while specifying old fd
      selftests/bpf: Add tests for attaching XDP programs


 include/linux/netdevice.h                          |  2 +-
 include/uapi/linux/if_link.h                       |  4 +-
 net/core/dev.c                                     | 25 ++++++++--
 net/core/rtnetlink.c                               | 11 +++++
 tools/include/uapi/linux/if_link.h                 |  4 +-
 tools/lib/bpf/libbpf.h                             |  2 +
 tools/lib/bpf/libbpf.map                           |  1 +
 tools/lib/bpf/netlink.c                            | 22 ++++++++-
 .../testing/selftests/bpf/prog_tests/xdp_attach.c  | 55 ++++++++++++++++++++++
 9 files changed, 117 insertions(+), 9 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_attach.c


^ permalink raw reply	[flat|nested] 120+ messages in thread

end of thread, other threads:[~2020-05-13 10:25 UTC | newest]

Thread overview: 120+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-03-19 13:13 [PATCH bpf-next 0/4] XDP: Support atomic replacement of XDP interface attachments Toke Høiland-Jørgensen
2020-03-19 13:13 ` [PATCH bpf-next 1/4] xdp: Support specifying expected existing program when attaching XDP Toke Høiland-Jørgensen
2020-03-19 22:52   ` Jakub Kicinski
2020-03-20  8:48     ` Toke Høiland-Jørgensen
2020-03-20 17:35       ` Jakub Kicinski
2020-03-20 18:17         ` Toke Høiland-Jørgensen
2020-03-20 18:35           ` Jakub Kicinski
2020-03-20 18:30         ` John Fastabend
2020-03-20 20:24           ` Andrii Nakryiko
2020-03-23 11:24             ` Toke Høiland-Jørgensen
2020-03-23 16:54               ` Jakub Kicinski
2020-03-23 18:14               ` Andrii Nakryiko
2020-03-23 19:23                 ` Toke Høiland-Jørgensen
2020-03-24  1:01                   ` David Ahern
2020-03-24  4:53                     ` Andrii Nakryiko
2020-03-24 20:55                       ` David Ahern
2020-03-24 22:56                         ` Andrii Nakryiko
2020-03-24  5:00                   ` Andrii Nakryiko
2020-03-24 10:57                     ` Toke Høiland-Jørgensen
2020-03-24 18:53                       ` Jakub Kicinski
2020-03-24 22:30                         ` Andrii Nakryiko
2020-03-25  1:25                           ` Jakub Kicinski
2020-03-24 19:22                       ` John Fastabend
2020-03-25  1:36                         ` Alexei Starovoitov
2020-03-25  2:15                           ` Jakub Kicinski
2020-03-25 18:06                             ` Alexei Starovoitov
2020-03-25 18:20                               ` Jakub Kicinski
2020-03-25 19:14                                 ` Alexei Starovoitov
2020-03-25 10:42                           ` Toke Høiland-Jørgensen
2020-03-25 18:11                             ` Alexei Starovoitov
2020-03-25 10:30                         ` Toke Høiland-Jørgensen
2020-03-25 17:56                           ` Alexei Starovoitov
2020-03-24 22:25                       ` Andrii Nakryiko
2020-03-25  9:38                         ` Toke Høiland-Jørgensen
2020-03-25 17:55                           ` Alexei Starovoitov
2020-03-26  0:16                           ` Andrii Nakryiko
2020-03-26  5:13                             ` Jakub Kicinski
2020-03-26 18:09                               ` Andrii Nakryiko
2020-03-26 19:40                               ` Alexei Starovoitov
2020-03-26 20:05                                 ` Edward Cree
2020-03-27 11:09                                   ` Lorenz Bauer
2020-03-27 23:11                                   ` Alexei Starovoitov
2020-03-26 10:04                             ` Lorenz Bauer
2020-03-26 17:47                               ` Jakub Kicinski
2020-03-26 19:45                                 ` Alexei Starovoitov
2020-03-26 18:18                               ` Andrii Nakryiko
2020-03-26 19:53                               ` Alexei Starovoitov
2020-03-27 11:11                                 ` Toke Høiland-Jørgensen
2020-04-02 20:21                                   ` bpf: ability to attach freplace to multiple parents Alexei Starovoitov
2020-04-02 21:23                                     ` Toke Høiland-Jørgensen
2020-04-02 21:54                                       ` Alexei Starovoitov
2020-04-03  8:38                                         ` Toke Høiland-Jørgensen
2020-04-07  1:44                                           ` Alexei Starovoitov
2020-04-07  9:20                                             ` Toke Høiland-Jørgensen
2020-05-12  8:34                                         ` Toke Høiland-Jørgensen
2020-05-12  9:53                                           ` Alan Maguire
2020-05-12 13:02                                             ` Toke Høiland-Jørgensen
2020-05-12 23:18                                             ` Alexei Starovoitov
2020-05-12 23:06                                           ` Alexei Starovoitov
2020-05-13 10:25                                             ` Toke Høiland-Jørgensen
2020-04-02 21:24                                     ` Andrey Ignatov
2020-04-02 22:01                                       ` Alexei Starovoitov
2020-03-26 12:35                             ` [PATCH bpf-next 1/4] xdp: Support specifying expected existing program when attaching XDP Toke Høiland-Jørgensen
2020-03-26 19:06                               ` Andrii Nakryiko
2020-03-27 11:06                                 ` Lorenz Bauer
2020-03-27 16:12                                   ` David Ahern
2020-03-27 20:10                                     ` Andrii Nakryiko
2020-03-27 23:02                                     ` Alexei Starovoitov
2020-03-30 15:25                                       ` Edward Cree
2020-03-31  3:43                                         ` Alexei Starovoitov
2020-03-31 22:05                                           ` Edward Cree
2020-03-31 22:16                                             ` Alexei Starovoitov
2020-03-27 19:42                                   ` Andrii Nakryiko
2020-03-27 19:45                                   ` Andrii Nakryiko
2020-03-27 23:09                                   ` Alexei Starovoitov
2020-03-27 11:46                                 ` Toke Høiland-Jørgensen
2020-03-27 20:07                                   ` Andrii Nakryiko
2020-03-27 22:16                                     ` Toke Høiland-Jørgensen
2020-03-27 22:54                                       ` Andrii Nakryiko
2020-03-28  1:09                                         ` Toke Høiland-Jørgensen
2020-03-28  1:44                                           ` Andrii Nakryiko
2020-03-28 19:43                                             ` Toke Høiland-Jørgensen
2020-03-26 19:58                               ` Alexei Starovoitov
2020-03-27 12:06                                 ` Toke Høiland-Jørgensen
2020-03-27 23:00                                   ` Alexei Starovoitov
2020-03-28  1:43                                     ` Toke Høiland-Jørgensen
2020-03-28  2:26                                       ` Alexei Starovoitov
2020-03-28 19:34                                         ` Toke Høiland-Jørgensen
2020-03-28 23:35                                           ` Alexei Starovoitov
2020-03-29 10:39                                             ` Toke Høiland-Jørgensen
2020-03-29 19:26                                               ` Alexei Starovoitov
2020-03-30 10:19                                                 ` Toke Høiland-Jørgensen
2020-03-29 20:23                                           ` Andrii Nakryiko
2020-03-30 13:53                                             ` Toke Høiland-Jørgensen
2020-03-30 20:17                                               ` Andrii Nakryiko
2020-03-31 10:13                                                 ` Toke Høiland-Jørgensen
2020-03-31 13:48                                                   ` Daniel Borkmann
2020-03-31 15:00                                                     ` Toke Høiland-Jørgensen
2020-03-31 20:19                                                       ` Andrii Nakryiko
2020-03-31 20:15                                                     ` Andrii Nakryiko
2020-03-30 15:41                                             ` Edward Cree
2020-03-30 19:13                                               ` Jakub Kicinski
2020-03-31  4:01                                               ` Alexei Starovoitov
2020-03-31 11:34                                                 ` Toke Høiland-Jørgensen
2020-03-31 18:52                                                   ` Alexei Starovoitov
2020-03-20 20:30       ` Daniel Borkmann
2020-03-20 20:40         ` Daniel Borkmann
2020-03-20 21:30           ` Jakub Kicinski
2020-03-20 21:55             ` Daniel Borkmann
2020-03-20 23:35               ` Jakub Kicinski
2020-03-20 20:39       ` Andrii Nakryiko
2020-03-23 11:25         ` Toke Høiland-Jørgensen
2020-03-23 18:07           ` Andrii Nakryiko
2020-03-23 23:54           ` Andrey Ignatov
2020-03-24 10:16             ` Toke Høiland-Jørgensen
2020-03-20  2:13   ` Yonghong Song
2020-03-20  8:48     ` Toke Høiland-Jørgensen
2020-03-19 13:13 ` [PATCH bpf-next 2/4] tools: Add EXPECTED_FD-related definitions in if_link.h Toke Høiland-Jørgensen
2020-03-19 13:13 ` [PATCH bpf-next 3/4] libbpf: Add function to set link XDP fd while specifying old fd Toke Høiland-Jørgensen
2020-03-19 13:13 ` [PATCH bpf-next 4/4] selftests/bpf: Add tests for attaching XDP programs Toke Høiland-Jørgensen

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