On 9/4/2025 3:01 PM, Asbjørn Sloth Tønnesen wrote:

This patch adds support for NLA_POLICY_NESTED_ARRAY() policies.

Example spec (from future wireguard.yaml):
-
  name: wgpeer
  attributes:
    -
      name: allowedips
      type: indexed-array
      sub-type: nest
      nested-attributes: wgallowedip

yields NLA_POLICY_NESTED_ARRAY(wireguard_wgallowedip_nl_policy).

This doesn't change any currently generated code, as it isn't
used in any specs currently used for generating code.

Signed-off-by: Asbjørn Sloth Tønnesen <redacted>
---

Is this keyed of off the sub-type? Does you mean that all the existing
uses of 'sub-type: nest' don't generate code today? Or that this
_attr_policy implementation is not called yet?

I checked and we have quite a number of uses:

$ rg 'sub-type: nest'
Documentation/netlink/specs/nlctrl.yaml
69:        sub-type: nest
74:        sub-type: nest

Documentation/netlink/specs/tc.yaml
2045:        sub-type: nest
2065:        sub-type: nest
2190:        sub-type: nest
2304:        sub-type: nest
2494:        sub-type: nest
3021:        sub-type: nest
3181:        sub-type: nest
3567:        sub-type: nest
3799:        sub-type: nest

Documentation/netlink/specs/rt-link.yaml
2203:        sub-type: nest

Documentation/netlink/specs/nl80211.yaml
610:        sub-type: nest
1309:        sub-type: nest
1314:        sub-type: nest
1337:        sub-type: nest
1420:        sub-type: nest
1476:        sub-type: nest
1615:        sub-type: nest