[PATCH net-next v3 0/8] xdp: make stack perform remove and add selftests

[Jakub Kicinski <jakub.kicinski@netronome.com>]

Hi!

The purpose of this series is to add a software model of BPF offloads
to make it easier for everyone to test them and make some of the more
arcane rules and assumptions more clear.

The series starts with 3 patches aiming to make XDP handling in the
drivers less error prone.  Currently driver authors have to remember
to free XDP programs if XDP is active during unregister.  With this
series the core will disable XDP on its own.  It will take place
after close, drivers are not expected to perform reconfiguration
when disabling XDP on a downed device.

Next two patches add the software netdev driver, followed by a python
test which exercises all the corner cases which came to my mind.

Test needs to be run as root.  It will print basic information to
stdout, but can also create a more detailed log of all commands
when --log option is passed.  Log is in Emacs Org-mode format.

  ./tools/testing/selftests/bpf/test_offload.py --log /tmp/log

Last two patches replace the SR-IOV API implementation of dummy.

v3:
 - move the freeing of vfs to release (Phil).
v2:
 - free device from the release function;
 - use bus-based name generatin instead of netdev name.
v1:
 - replace the SR-IOV API implementation of dummy;
 - make the dev_xdp_uninstall() also handle the XDP generic (Daniel).

Jakub Kicinski (8):
  net: xdp: avoid output parameters when querying XDP prog
  net: xdp: report flags program was installed with on query
  net: xdp: make the stack take care of the tear down
  netdevsim: add software driver for testing offloads
  netdevsim: add bpf offload support
  selftests/bpf: add offload test based on netdevsim
  netdevsim: add SR-IOV functionality
  net: dummy: remove fake SR-IOV functionality

 MAINTAINERS                                        |   5 +
 drivers/net/Kconfig                                |  11 +
 drivers/net/Makefile                               |   1 +
 drivers/net/dummy.c                                | 215 +------
 drivers/net/ethernet/broadcom/bnxt/bnxt.c          |   2 -
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c  |   3 -
 drivers/net/ethernet/netronome/nfp/bpf/main.c      |   7 -
 .../net/ethernet/netronome/nfp/nfp_net_common.c    |   4 +-
 drivers/net/ethernet/qlogic/qede/qede_main.c       |   4 -
 drivers/net/netdevsim/Makefile                     |   7 +
 drivers/net/netdevsim/bpf.c                        | 373 +++++++++++
 drivers/net/netdevsim/netdev.c                     | 502 +++++++++++++++
 drivers/net/netdevsim/netdevsim.h                  |  78 +++
 drivers/net/tun.c                                  |   4 -
 include/linux/netdevice.h                          |   5 +-
 net/core/dev.c                                     |  53 +-
 net/core/rtnetlink.c                               |   6 +-
 tools/testing/selftests/bpf/Makefile               |   5 +-
 tools/testing/selftests/bpf/sample_ret0.c          |   7 +
 tools/testing/selftests/bpf/test_offload.py        | 681 +++++++++++++++++++++
 20 files changed, 1715 insertions(+), 258 deletions(-)
 create mode 100644 drivers/net/netdevsim/Makefile
 create mode 100644 drivers/net/netdevsim/bpf.c
 create mode 100644 drivers/net/netdevsim/netdev.c
 create mode 100644 drivers/net/netdevsim/netdevsim.h
 create mode 100644 tools/testing/selftests/bpf/sample_ret0.c
 create mode 100755 tools/testing/selftests/bpf/test_offload.py

-- 
2.15.0