On Wed, 25 Mar 2026 15:50:10 +0100 Björn Töpel wrote:

+      -
+        name: depth
+        type: u8
+        doc: |
+          Ordering index within a component instance. When a component
+          has multiple loopback points of the same type (e.g. two PCS
+          blocks inside a rate-adaptation PHY), depth distinguishes
+          them. Lower depth values are closer to the host side, higher
+          values are closer to the line/media side. Defaults to 0 when
+          there is only one loopback point per (component, name) tuple.
+      -
+        name: supported
+        type: u8
+        enum: loopback-direction
+        enum-as-flags: true
+        doc: Bitmask of supported loopback directions
+      -
+        name: direction
+        type: u8
+        enum: loopback-direction
+        doc: Current loopback direction, 0 means disabled

u32, Netlink attrs are padded to 4B anyway