tools/net/ynl: Add binary and pad support to structs for tc

The tc netlink-raw family needs binary and pad types for several
qopt C structs. Add support for them to ynl.
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://lore.kernel.org/r/20231215093720.18774-6-donald.hunter@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

tools/net/ynl/lib/ynl.py

@@ -670,8 +670,11 @@ class YnlFamily(SpecFamily):
             fixed_header_members = self.consts[name].members
             size = 0
             for m in fixed_header_members:
-                format = NlAttr.get_format(m.type, m.byte_order)
-                size += format.size
+                if m.type in ['pad', 'binary']:
+                    size += m.len
+                else:
+                    format = NlAttr.get_format(m.type, m.byte_order)
+                    size += format.size
             return size
         else:
             return 0
@@ -681,12 +684,20 @@ class YnlFamily(SpecFamily):
         fixed_header_attrs = dict()
         offset = 0
         for m in fixed_header_members:
-            format = NlAttr.get_format(m.type, m.byte_order)
-            [ value ] = format.unpack_from(msg.raw, offset)
-            offset += format.size
-            if m.enum:
-                value = self._decode_enum(value, m)
-            fixed_header_attrs[m.name] = value
+            value = None
+            if m.type == 'pad':
+                offset += m.len
+            elif m.type == 'binary':
+                value = msg.raw[offset : offset + m.len]
+                offset += m.len
+            else:
+                format = NlAttr.get_format(m.type, m.byte_order)
+                [ value ] = format.unpack_from(msg.raw, offset)
+                offset += format.size
+            if value is not None:
+                if m.enum:
+                    value = self._decode_enum(value, m)
+                fixed_header_attrs[m.name] = value
         return fixed_header_attrs
 
     def handle_ntf(self, decoded):
@@ -753,8 +764,13 @@ class YnlFamily(SpecFamily):
             fixed_header_members = self.consts[op.fixed_header].members
             for m in fixed_header_members:
                 value = vals.pop(m.name) if m.name in vals else 0
-                format = NlAttr.get_format(m.type, m.byte_order)
-                msg += format.pack(value)
+                if m.type == 'pad':
+                    msg += bytearray(m.len)
+                elif m.type == 'binary':
+                    msg += bytes.fromhex(value)
+                else:
+                    format = NlAttr.get_format(m.type, m.byte_order)
+                    msg += format.pack(value)
         for name, value in vals.items():
             msg += self._add_attr(op.attr_set.name, name, value)
         msg = _genl_msg_finalize(msg)