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tools/net/ynl: Add nest-type-value decoding 

The nlctrl genetlink-legacy family uses nest-type-value encoding as
described in Documentation/userspace-api/netlink/genetlink-legacy.rst

Add nest-type-value decoding to ynl.

Signed-off-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://lore.kernel.org/r/20240306231046.97158-5-donald.hunter@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Donald Hunter 2024-03-06 23:10:44 +00:00 committed by Jakub Kicinski
parent 6fe7de5e9c
commit b6e6a76dec
1 changed files with 12 additions and 0 deletions
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12
tools/net/ynl/lib/ynl.py
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@ -595,6 +595,16 @@ class YnlFamily(SpecFamily):
decoded.append({ item.type: subattrs })
return decoded
def _decode_nest_type_value(self, attr, attr_spec):
decoded = {}
value = attr
for name in attr_spec['type-value']:
value = NlAttr(value.raw, 0)
decoded[name] = value.type
subattrs = self._decode(NlAttrs(value.raw), attr_spec['nested-attributes'])
decoded.update(subattrs)
return decoded
def _decode_unknown(self, attr):
if attr.is_nest:
return self._decode(NlAttrs(attr.raw), None)
@ -686,6 +696,8 @@ class YnlFamily(SpecFamily):
decoded = {"value": value, "selector": selector}
elif attr_spec["type"] == 'sub-message':
decoded = self._decode_sub_msg(attr, attr_spec, search_attrs)
elif attr_spec["type"] == 'nest-type-value':
decoded = self._decode_nest_type_value(attr, attr_spec)
else:
if not self.process_unknown:
raise Exception(f'Unknown {attr_spec["type"]} with name {attr_spec["name"]}')