KRT: Add kernel metric protocol option

Kernel routes with different metrics do not clash with each other,
therefore using dedicated metric value is a reliable way to avoid
overwriting routes from other sources (e.g. kernel device routes).

Although kernel route metric could already be set as a route attribute by
filters, that is not consistent with the way how Linux kernel handles
route metric - not just a route attribute, but a part of a route key.

1 files changed, 1 insertions, 0 deletions

diff --git a/sysdep/linux/krt-sys.h b/sysdep/linux/krt-sys.h
index 076870f5..96688e34 100644
--- a/sysdep/linux/krt-sys.h
+++ b/sysdep/linux/krt-sys.h
@@ -88,6 +88,7 @@ static inline struct ifa * kif_get_primary_ip(struct iface *i) { return NULL; }
 
 struct krt_params {
   u32 table_id;				/* Kernel table ID we sync with */
+  u32 metric;				/* Kernel metric used for all routes */
 };
 
 struct krt_state {