ynl: rename array-nest to indexed-array

Some implementations, like bonding, has nest array with same attr type.
To support all kinds of entries under one nest array. As discussed[1],
let's rename array-nest to indexed-array, and assuming the value is
a nest by passing the type via sub-type.

[1] https://lore.kernel.org/netdev/20240312100105.16a59086@kernel.org/

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20240404063114.1221532-2-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

2 files changed, 20 insertions, 11 deletions

diff --git a/tools/net/ynl/lib/ynl.py b/tools/net/ynl/lib/ynl.py
index b30210f537f7..d671efea808a 100644
--- a/tools/net/ynl/lib/ynl.py
+++ b/tools/net/ynl/lib/ynl.py
@@ -631,15 +631,18 @@ class YnlFamily(SpecFamily):
                 decoded = self._formatted_string(decoded, attr_spec.display_hint)
         return decoded
 
-    def _decode_array_nest(self, attr, attr_spec):
+    def _decode_array_attr(self, attr, attr_spec):
         decoded = []
         offset = 0
         while offset < len(attr.raw):
             item = NlAttr(attr.raw, offset)
             offset += item.full_len
 
-            subattrs = self._decode(NlAttrs(item.raw), attr_spec['nested-attributes'])
-            decoded.append({ item.type: subattrs })
+            if attr_spec["sub-type"] == 'nest':
+                subattrs = self._decode(NlAttrs(item.raw), attr_spec['nested-attributes'])
+                decoded.append({ item.type: subattrs })
+            else:
+                raise Exception(f'Unknown {attr_spec["sub-type"]} with name {attr_spec["name"]}')
         return decoded
 
     def _decode_nest_type_value(self, attr, attr_spec):
@@ -733,8 +736,8 @@ class YnlFamily(SpecFamily):
                 decoded = attr.as_scalar(attr_spec['type'], attr_spec.byte_order)
                 if 'enum' in attr_spec:
                     decoded = self._decode_enum(decoded, attr_spec)
-            elif attr_spec["type"] == 'array-nest':
-                decoded = self._decode_array_nest(attr, attr_spec)
+            elif attr_spec["type"] == 'indexed-array':
+                decoded = self._decode_array_attr(attr, attr_spec)
             elif attr_spec["type"] == 'bitfield32':
                 value, selector = struct.unpack("II", attr.raw)
                 if 'enum' in attr_spec:
diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index a451cbfbd781..c0b90c104d92 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -841,8 +841,11 @@ class AttrSet(SpecAttrSet):
             t = TypeBitfield32(self.family, self, elem, value)
         elif elem['type'] == 'nest':
             t = TypeNest(self.family, self, elem, value)
-        elif elem['type'] == 'array-nest':
-            t = TypeArrayNest(self.family, self, elem, value)
+        elif elem['type'] == 'indexed-array' and 'sub-type' in elem:
+            if elem["sub-type"] == 'nest':
+                t = TypeArrayNest(self.family, self, elem, value)
+            else:
+                raise Exception(f'new_attr: unsupported sub-type {elem["sub-type"]}')
         elif elem['type'] == 'nest-type-value':
             t = TypeNestTypeValue(self.family, self, elem, value)
         else:
@@ -1055,7 +1058,7 @@ class Family(SpecFamily):
                     if nested in self.root_sets:
                         raise Exception("Inheriting members to a space used as root not supported")
                     inherit.update(set(spec['type-value']))
-                elif spec['type'] == 'array-nest':
+                elif spec['type'] == 'indexed-array':
                     inherit.add('idx')
                 self.pure_nested_structs[nested].set_inherited(inherit)
 
@@ -1619,9 +1622,12 @@ def _multi_parse(ri, struct, init_lines, local_vars):
     multi_attrs = set()
     needs_parg = False
     for arg, aspec in struct.member_list():
-        if aspec['type'] == 'array-nest':
-            local_vars.append(f'const struct nlattr *attr_{aspec.c_name};')
-            array_nests.add(arg)
+        if aspec['type'] == 'indexed-array' and 'sub-type' in aspec:
+            if aspec["sub-type"] == 'nest':
+                local_vars.append(f'const struct nlattr *attr_{aspec.c_name};')
+                array_nests.add(arg)
+            else:
+                raise Exception(f'Not supported sub-type {aspec["sub-type"]}')
         if 'multi-attr' in aspec:
             multi_attrs.add(arg)
         needs_parg |= 'nested-attributes' in aspec