netlink: specs: rt-link: decode ip6gre

Driver tests now require GRE tunnels, while we don't configure
them with YNL, YNL will complain when it sees link types it
doesn't recognize. Teach it decoding ip6gre tunnels. The attrs
are largely the same as IPv4 GRE.

Correct the type of encap-limit, but note that this attr is
only used in ip6gre, so the mistake didn't matter until now.

Fixes: 0d0f4174f6c8 ("selftests: drv-net: add a simple TSO test")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://patch.msgid.link/20250603135357.502626-3-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/Documentation/netlink/specs/rt-link.yaml b/Documentation/netlink/specs/rt-link.yaml
index 6521125162e6f54df0e0a50659df93773790cbaa..b41b31eebcae6856e78e04b94398d30916a5bb5e 100644 (file)
--- a/Documentation/netlink/specs/rt-link.yaml
+++ b/Documentation/netlink/specs/rt-link.yaml
@@ -1717,7 +1717,7 @@ attribute-sets:
         type: u8
       -
         name: encap-limit
-        type: u32
+        type: u8
       -
         name: flowinfo
         type: u32
@@ -1760,6 +1760,54 @@ attribute-sets:
       -
         name: erspan-hwid
         type: u16
+  -
+    name: linkinfo-gre6-attrs
+    subset-of: linkinfo-gre-attrs
+    attributes:
+      -
+        name: link
+      -
+        name: iflags
+      -
+        name: oflags
+      -
+        name: ikey
+      -
+        name: okey
+      -
+        name: local
+        display-hint: ipv6
+      -
+        name: remote
+        display-hint: ipv6
+      -
+        name: ttl
+      -
+        name: encap-limit
+      -
+        name: flowinfo
+      -
+        name: flags
+      -
+        name: encap-type
+      -
+        name: encap-flags
+      -
+        name: encap-sport
+      -
+        name: encap-dport
+      -
+        name: collect-metadata
+      -
+        name: fwmark
+      -
+        name: erspan-index
+      -
+        name: erspan-ver
+      -
+        name: erspan-dir
+      -
+        name: erspan-hwid
   -
     name: linkinfo-vti-attrs
     name-prefix: ifla-vti-
@@ -2239,6 +2287,9 @@ sub-messages:
       -
         value: gretap
         attribute-set: linkinfo-gre-attrs
+      -
+        value: ip6gre
+        attribute-set: linkinfo-gre6-attrs
       -
         value: geneve
         attribute-set: linkinfo-geneve-attrs