[PATCH net-next v2 0/4] genetlink: apply reject policy for split ops on the dispatch path

[Jakub Kicinski <kuba@kernel.org>]

Looks like I somehow missed adding default reject policies to commands
in families using split Netlink ops. I realized this randomly trying
to dump page pools for a specific device and always getting all of them
back. The per-device dump is simply not implemented so the request
should have been rejected. Patch 2 is the real change, the rest is
just accompaniment.

v2:
 - add patch 1 to avoid breaking devlink
 - add a lot more tests
v1: https://lore.kernel.org/20260307204425.1900467-1-kuba@kernel.org

Jakub Kicinski (4):
  genetlink: use maxattr of 0 for the reject policy
  genetlink: apply reject policy for split ops on the dispatch path
  selftests: net: make sure that Netlink rejects unknown attrs in dump
  selftests: net: add test for Netlink policy dumps

 tools/testing/selftests/net/Makefile          |   1 +
 net/netlink/genetlink.c                       |  20 +--
 net/netlink/policy.c                          |   4 +-
 .../testing/selftests/net/lib/py/__init__.py  |   5 +-
 tools/testing/selftests/net/lib/py/ynl.py     |  10 +-
 tools/testing/selftests/net/nl_netdev.py      |  32 ++++-
 tools/testing/selftests/net/nl_nlctrl.py      | 135 ++++++++++++++++++
 7 files changed, 186 insertions(+), 21 deletions(-)
 create mode 100755 tools/testing/selftests/net/nl_nlctrl.py

-- 
2.53.0