route/link: add link info compare operation

Signed-off-by: Balki Raman <ramanb@cumulusnetworks.com>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/lib/route/link/api.c b/lib/route/link/api.c
index 6d1e12f..00893ad 100644
--- a/lib/route/link/api.c
+++ b/lib/route/link/api.c
@@ -391,6 +391,28 @@ out:
 	return ret;
 }
 
+/**
+ * Compare link info data
+ * @arg a              Link object a
+ * @arg b              Link object b
+ *
+ * This function will compare link_info data between two links
+ * a and b
+ *
+ * @return 0 if link_info data matches or is not present
+ * or != 0 if it mismatches.
+ */
+int rtnl_link_info_data_compare(struct rtnl_link *a, struct rtnl_link *b)
+{
+	if (a->l_info_ops != b->l_info_ops)
+		return ~0;
+
+	if (!a->l_info_ops || !a->l_info_ops->io_compare)
+		return 0;
+
+	return a->l_info_ops->io_compare(a, b, ~0, 0);
+}
+
 /** @} */
 
 /** @} */