[PATCH 1/4] link af ops: Add new ao_compare op to compare link af_data

[roopa at cumulusnetworks.com]

From: roopa <roopa at cumulusnetworks.com>

This patch adds new operation to compare link af_data.
ao_compare is similar to object oo_compare operation.
This op can be used when two links are compared
 for their af data. It takes two link objects in
question, an object specific bitmask defining which
attributes should be compared and flags to control
the behaviour. The function must return a bitmask
with the relevant bit set for each attribute that mismatches.

Signed-off-by: Roopa Prabhu <roopa at cumulusnetworks.com>
---
 include/netlink/route/link/api.h |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/netlink/route/link/api.h b/include/netlink/route/link/api.h
index e6dad27..92a48f7 100644
--- a/include/netlink/route/link/api.h
+++ b/include/netlink/route/link/api.h
@@ -119,6 +119,19 @@ struct rtnl_link_af_ops
 	void		      (*ao_dump[NL_DUMP_MAX+1])(struct rtnl_link *,
 							struct nl_dump_params *,
 							void *);
+
+	/** Comparison function
+	 *
+	 * Will be called when two links are compared for their af data. It
+	 * takes two link objects in question, an object specific bitmask
+	 * defining which attributes should be compared and flags to control
+	 * the behaviour
+	 *
+	 * The function must return a bitmask with the relevant bit set for
+	 * each attribute that mismatches
+	 */
+	int		      (*ao_compare)(struct rtnl_link *,
+					    struct rtnl_link *, int, uint32_t, int);
 };
 
 extern struct rtnl_link_af_ops *rtnl_link_af_ops_lookup(unsigned int);
-- 
1.7.10.4