6 files changed, 167 insertions, 103 deletions

diff --git a/include/netlink-private/route/link/api.h b/include/netlink-private/route/link/api.h
index bb98ccc..85f83f3 100644
--- a/include/netlink-private/route/link/api.h
+++ b/include/netlink-private/route/link/api.h
@@ -60,6 +60,10 @@ struct rtnl_link_info_ops
 	 * in either io_alloc() or io_parse(). */
 	void	      (*io_free)(struct rtnl_link *);
 
+	/** Called to compare link info parameters between two links. */
+	int	      (*io_compare)(struct rtnl_link *, struct rtnl_link *,
+				    uint32_t attrs, int flags);
+
 	struct nl_list_head		io_list;
 };
 
@@ -145,6 +149,8 @@ extern int			rtnl_link_af_unregister(struct rtnl_link_af_ops *);
 extern int			rtnl_link_af_data_compare(struct rtnl_link *a,
 							  struct rtnl_link *b,
 							  int family);
+extern int			rtnl_link_info_data_compare(struct rtnl_link *a,
+							    struct rtnl_link *b);
 
 #ifdef __cplusplus
 }
diff --git a/include/netlink/utils.h b/include/netlink/utils.h
index babe1b2..72a98f4 100644
--- a/include/netlink/utils.h
+++ b/include/netlink/utils.h
@@ -185,6 +185,12 @@ enum {
 	NL_CAPABILITY_RTNL_LINK_VLAN_INGRESS_MAP_CLEAR = 14,
 #define NL_CAPABILITY_RTNL_LINK_VLAN_INGRESS_MAP_CLEAR NL_CAPABILITY_RTNL_LINK_VLAN_INGRESS_MAP_CLEAR
 
+	/**
+	 * Consider vxlan link info for nl_object_diff().
+	 */
+	NL_CAPABILITY_RTNL_LINK_VXLAN_IO_COMPARE = 15,
+#define NL_CAPABILITY_RTNL_LINK_VXLAN_IO_COMPARE NL_CAPABILITY_RTNL_LINK_VXLAN_IO_COMPARE
+
 	__NL_CAPABILITY_MAX,
 	NL_CAPABILITY_MAX = (__NL_CAPABILITY_MAX - 1),
 #define NL_CAPABILITY_MAX NL_CAPABILITY_MAX
diff --git a/lib/route/link.c b/lib/route/link.c
index 8ef43b5..cfe3779 100644
--- a/lib/route/link.c
+++ b/lib/route/link.c
@@ -960,6 +960,7 @@ static int link_compare(struct nl_object *_a, struct nl_object *_b,
 			goto protinfo_mismatch;
 	}
 
+	diff |= LINK_DIFF(LINKINFO, rtnl_link_info_data_compare(a, b) != 0);
 out:
 	return diff;
 
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);
+}
+
 /** @} */
 
 /** @} */
diff --git a/lib/route/link/vxlan.c b/lib/route/link/vxlan.c
index 184373e..10387bd 100644
--- a/lib/route/link/vxlan.c
+++ b/lib/route/link/vxlan.c
@@ -34,22 +34,22 @@
 #include <linux/if_link.h>
 
 /** @cond SKIP */
-#define VXLAN_HAS_ID	(1<<0)
-#define VXLAN_HAS_GROUP	(1<<1)
-#define VXLAN_HAS_LINK	(1<<2)
-#define VXLAN_HAS_LOCAL	(1<<3)
-#define VXLAN_HAS_TTL	(1<<4)
-#define VXLAN_HAS_TOS	(1<<5)
-#define VXLAN_HAS_LEARNING	(1<<6)
-#define VXLAN_HAS_AGEING	(1<<7)
-#define VXLAN_HAS_LIMIT		(1<<8)
-#define VXLAN_HAS_PORT_RANGE	(1<<9)
-#define VXLAN_HAS_PROXY	(1<<10)
-#define VXLAN_HAS_RSC	(1<<11)
-#define VXLAN_HAS_L2MISS	(1<<12)
-#define VXLAN_HAS_L3MISS	(1<<13)
-#define VXLAN_HAS_GROUP6	(1<<14)
-#define VXLAN_HAS_LOCAL6	(1<<15)
+#define VXLAN_ATTR_ID           (1<<0)
+#define VXLAN_ATTR_GROUP        (1<<1)
+#define VXLAN_ATTR_LINK         (1<<2)
+#define VXLAN_ATTR_LOCAL        (1<<3)
+#define VXLAN_ATTR_TTL          (1<<4)
+#define VXLAN_ATTR_TOS          (1<<5)
+#define VXLAN_ATTR_LEARNING     (1<<6)
+#define VXLAN_ATTR_AGEING       (1<<7)
+#define VXLAN_ATTR_LIMIT        (1<<8)
+#define VXLAN_ATTR_PORT_RANGE   (1<<9)
+#define VXLAN_ATTR_PROXY        (1<<10)
+#define VXLAN_ATTR_RSC          (1<<11)
+#define VXLAN_ATTR_L2MISS       (1<<12)
+#define VXLAN_ATTR_L3MISS       (1<<13)
+#define VXLAN_ATTR_GROUP6       (1<<14)
+#define VXLAN_ATTR_LOCAL6       (1<<15)
 
 struct vxlan_info
 {
@@ -69,7 +69,7 @@ struct vxlan_info
 	uint8_t			vxi_rsc;
 	uint8_t			vxi_l2miss;
 	uint8_t			vxi_l3miss;
-	uint32_t		vxi_mask;
+	uint32_t		ce_mask;
 };
 
 /** @endcond */
@@ -128,89 +128,89 @@ static int vxlan_parse(struct rtnl_link *link, struct nlattr *data,
 
 	if (tb[IFLA_VXLAN_ID]) {
 		vxi->vxi_id = nla_get_u32(tb[IFLA_VXLAN_ID]);
-		vxi->vxi_mask |= VXLAN_HAS_ID;
+		vxi->ce_mask |= VXLAN_ATTR_ID;
 	}
 
 	if (tb[IFLA_VXLAN_GROUP6]) {
 		nla_memcpy(&vxi->vxi_group6, tb[IFLA_VXLAN_GROUP6],
 			   sizeof(vxi->vxi_group6));
-		vxi->vxi_mask |= VXLAN_HAS_GROUP6;
+		vxi->ce_mask |= VXLAN_ATTR_GROUP6;
 	}
 
 	if (tb[IFLA_VXLAN_GROUP]) {
 		nla_memcpy(&vxi->vxi_group, tb[IFLA_VXLAN_GROUP],
 				   sizeof(vxi->vxi_group));
-		vxi->vxi_mask |= VXLAN_HAS_GROUP;
-		vxi->vxi_mask &= ~VXLAN_HAS_GROUP6;
+		vxi->ce_mask |= VXLAN_ATTR_GROUP;
+		vxi->ce_mask &= ~VXLAN_ATTR_GROUP6;
 	}
 
 	if (tb[IFLA_VXLAN_LINK]) {
 		vxi->vxi_link = nla_get_u32(tb[IFLA_VXLAN_LINK]);
-		vxi->vxi_mask |= VXLAN_HAS_LINK;
+		vxi->ce_mask |= VXLAN_ATTR_LINK;
 	}
 
 	if (tb[IFLA_VXLAN_LOCAL6]) {
 		nla_memcpy(&vxi->vxi_local6, tb[IFLA_VXLAN_LOCAL6],
 			   sizeof(vxi->vxi_local6));
-		vxi->vxi_mask |= VXLAN_HAS_LOCAL6;
+		vxi->ce_mask |= VXLAN_ATTR_LOCAL6;
 	}
 
 	if (tb[IFLA_VXLAN_LOCAL]) {
 		nla_memcpy(&vxi->vxi_local, tb[IFLA_VXLAN_LOCAL],
 				   sizeof(vxi->vxi_local));
-		vxi->vxi_mask |= VXLAN_HAS_LOCAL;
-		vxi->vxi_mask &= ~VXLAN_HAS_LOCAL6;
+		vxi->ce_mask |= VXLAN_ATTR_LOCAL;
+		vxi->ce_mask &= ~VXLAN_ATTR_LOCAL6;
 	}
 
 	if (tb[IFLA_VXLAN_TTL]) {
 		vxi->vxi_ttl = nla_get_u8(tb[IFLA_VXLAN_TTL]);
-		vxi->vxi_mask |= VXLAN_HAS_TTL;
+		vxi->ce_mask |= VXLAN_ATTR_TTL;
 	}
 
 	if (tb[IFLA_VXLAN_TOS]) {
 		vxi->vxi_tos = nla_get_u8(tb[IFLA_VXLAN_TOS]);
-		vxi->vxi_mask |= VXLAN_HAS_TOS;
+		vxi->ce_mask |= VXLAN_ATTR_TOS;
 	}
 
 	if (tb[IFLA_VXLAN_LEARNING]) {
 		vxi->vxi_learning = nla_get_u8(tb[IFLA_VXLAN_LEARNING]);
-		vxi->vxi_mask |= VXLAN_HAS_LEARNING;
+		vxi->ce_mask |= VXLAN_ATTR_LEARNING;
 	}
 
 	if (tb[IFLA_VXLAN_AGEING]) {
 		vxi->vxi_ageing = nla_get_u32(tb[IFLA_VXLAN_AGEING]);
-		vxi->vxi_mask |= VXLAN_HAS_AGEING;
+		vxi->ce_mask |= VXLAN_ATTR_AGEING;
 	}
 
 	if (tb[IFLA_VXLAN_LIMIT]) {
 		vxi->vxi_limit = nla_get_u32(tb[IFLA_VXLAN_LIMIT]);
-		vxi->vxi_mask |= VXLAN_HAS_LIMIT;
+		vxi->ce_mask |= VXLAN_ATTR_LIMIT;
 	}
 
 	if (tb[IFLA_VXLAN_PORT_RANGE]) {
 		nla_memcpy(&vxi->vxi_port_range, tb[IFLA_VXLAN_PORT_RANGE],
 				   sizeof(vxi->vxi_port_range));
-		vxi->vxi_mask |= VXLAN_HAS_PORT_RANGE;
+		vxi->ce_mask |= VXLAN_ATTR_PORT_RANGE;
 	}
 
 	if (tb[IFLA_VXLAN_PROXY]) {
 		vxi->vxi_proxy = nla_get_u8(tb[IFLA_VXLAN_PROXY]);
-		vxi->vxi_mask |= VXLAN_HAS_PROXY;
+		vxi->ce_mask |= VXLAN_ATTR_PROXY;
 	}
 
 	if (tb[IFLA_VXLAN_RSC]) {
 		vxi->vxi_rsc = nla_get_u8(tb[IFLA_VXLAN_RSC]);
-		vxi->vxi_mask |= VXLAN_HAS_RSC;
+		vxi->ce_mask |= VXLAN_ATTR_RSC;
 	}
 
 	if (tb[IFLA_VXLAN_L2MISS]) {
 		vxi->vxi_l2miss = nla_get_u8(tb[IFLA_VXLAN_L2MISS]);
-		vxi->vxi_mask |= VXLAN_HAS_L2MISS;
+		vxi->ce_mask |= VXLAN_ATTR_L2MISS;
 	}
 
 	if (tb[IFLA_VXLAN_L3MISS]) {
 		vxi->vxi_l3miss = nla_get_u8(tb[IFLA_VXLAN_L3MISS]);
-		vxi->vxi_mask |= VXLAN_HAS_L3MISS;
+		vxi->ce_mask |= VXLAN_ATTR_L3MISS;
 	}
 
 	err = 0;
@@ -242,13 +242,13 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 
 	nl_dump_line(p, "    vxlan-id %u\n", vxi->vxi_id);
 
-	if (vxi->vxi_mask & VXLAN_HAS_GROUP) {
+	if (vxi->ce_mask & VXLAN_ATTR_GROUP) {
 		nl_dump(p, "      group ");
 		if (inet_ntop(AF_INET, &vxi->vxi_group, addr, sizeof(addr)))
 			nl_dump_line(p, "%s\n", addr);
 		else
 			nl_dump_line(p, "%#x\n", ntohs(vxi->vxi_group));
-	} else if (vxi->vxi_mask & VXLAN_HAS_GROUP6) {
+	} else if (vxi->ce_mask & VXLAN_ATTR_GROUP6) {
 		nl_dump(p, "      group ");
 		if (inet_ntop(AF_INET6, &vxi->vxi_group6, addr, sizeof(addr)))
 			nl_dump_line(p, "%s\n", addr);
@@ -256,7 +256,7 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "%#x\n", vxi->vxi_group6);
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_LINK) {
+	if (vxi->ce_mask & VXLAN_ATTR_LINK) {
 		nl_dump(p, "      link ");
 
 		name = NULL;
@@ -270,13 +270,13 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "%u\n", vxi->vxi_link);
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_LOCAL) {
+	if (vxi->ce_mask & VXLAN_ATTR_LOCAL) {
 		nl_dump(p, "      local ");
 		if (inet_ntop(AF_INET, &vxi->vxi_local, addr, sizeof(addr)))
 			nl_dump_line(p, "%s\n", addr);
 		else
 			nl_dump_line(p, "%#x\n", ntohs(vxi->vxi_local));
-	} else if (vxi->vxi_mask & VXLAN_HAS_LOCAL6) {
+	} else if (vxi->ce_mask & VXLAN_ATTR_LOCAL6) {
 		nl_dump(p, "      local ");
 		if (inet_ntop(AF_INET6, &vxi->vxi_local6, addr, sizeof(addr)))
 			nl_dump_line(p, "%s\n", addr);
@@ -285,7 +285,7 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 	}
 
 
-	if (vxi->vxi_mask & VXLAN_HAS_TTL) {
+	if (vxi->ce_mask & VXLAN_ATTR_TTL) {
 		nl_dump(p, "      ttl ");
 		if(vxi->vxi_ttl)
 			nl_dump_line(p, "%u\n", vxi->vxi_ttl);
@@ -293,7 +293,7 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "inherit\n");
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_TOS) {
+	if (vxi->ce_mask & VXLAN_ATTR_TOS) {
 		nl_dump(p, "      tos ");
 		if (vxi->vxi_tos == 1)
 			nl_dump_line(p, "inherit\n", vxi->vxi_tos);
@@ -301,7 +301,7 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "%#x\n", vxi->vxi_tos);
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_LEARNING) {
+	if (vxi->ce_mask & VXLAN_ATTR_LEARNING) {
 		nl_dump(p, "      learning ");
 		if (vxi->vxi_learning)
 			nl_dump_line(p, "enabled (%#x)\n", vxi->vxi_learning);
@@ -309,7 +309,7 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "disabled\n");
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_AGEING) {
+	if (vxi->ce_mask & VXLAN_ATTR_AGEING) {
 		nl_dump(p, "      ageing ");
 		if (vxi->vxi_ageing)
 			nl_dump_line(p, "%u seconds\n", vxi->vxi_ageing);
@@ -317,7 +317,7 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "disabled\n");
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_LIMIT) {
+	if (vxi->ce_mask & VXLAN_ATTR_LIMIT) {
 		nl_dump(p, "      limit ");
 		if (vxi->vxi_limit)
 			nl_dump_line(p, "%u\n", vxi->vxi_limit);
@@ -325,12 +325,12 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "unlimited\n");
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_PORT_RANGE)
+	if (vxi->ce_mask & VXLAN_ATTR_PORT_RANGE)
 		nl_dump_line(p, "      port range %u - %u\n",
 					 ntohs(vxi->vxi_port_range.low),
 					 ntohs(vxi->vxi_port_range.high));
 
-	if (vxi->vxi_mask & VXLAN_HAS_PROXY) {
+	if (vxi->ce_mask & VXLAN_ATTR_PROXY) {
 		nl_dump(p, "      proxy ");
 		if (vxi->vxi_proxy)
 			nl_dump_line(p, "enabled (%#x)\n", vxi->vxi_proxy);
@@ -338,7 +338,7 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "disabled\n");
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_RSC) {
+	if (vxi->ce_mask & VXLAN_ATTR_RSC) {
 		nl_dump(p, "      rsc ");
 		if (vxi->vxi_rsc)
 			nl_dump_line(p, "enabled (%#x)\n", vxi->vxi_rsc);
@@ -346,7 +346,7 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "disabled\n");
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_L2MISS) {
+	if (vxi->ce_mask & VXLAN_ATTR_L2MISS) {
 		nl_dump(p, "      l2miss ");
 		if (vxi->vxi_l2miss)
 			nl_dump_line(p, "enabled (%#x)\n", vxi->vxi_l2miss);
@@ -354,7 +354,7 @@ static void vxlan_dump_details(struct rtnl_link *link, struct nl_dump_params *p)
 			nl_dump_line(p, "disabled\n");
 	}
 
-	if (vxi->vxi_mask & VXLAN_HAS_L3MISS) {
+	if (vxi->ce_mask & VXLAN_ATTR_L3MISS) {
 		nl_dump(p, "      l3miss ");
 		if (vxi->vxi_l3miss)
 			nl_dump_line(p, "enabled (%#x)\n", vxi->vxi_l3miss);
@@ -389,53 +389,53 @@ static int vxlan_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
 	if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
 		return -NLE_MSGSIZE;
 
-	if (vxi->vxi_mask & VXLAN_HAS_ID)
+	if (vxi->ce_mask & VXLAN_ATTR_ID)
 		NLA_PUT_U32(msg, IFLA_VXLAN_ID, vxi->vxi_id);
 
-	if (vxi->vxi_mask & VXLAN_HAS_GROUP)
+	if (vxi->ce_mask & VXLAN_ATTR_GROUP)
 		NLA_PUT(msg, IFLA_VXLAN_GROUP, sizeof(vxi->vxi_group), &vxi->vxi_group);
 
-	if (vxi->vxi_mask & VXLAN_HAS_GROUP6)
+	if (vxi->ce_mask & VXLAN_ATTR_GROUP6)
 		NLA_PUT(msg, IFLA_VXLAN_GROUP6, sizeof(vxi->vxi_group6), &vxi->vxi_group6);
 
-	if (vxi->vxi_mask & VXLAN_HAS_LINK)
+	if (vxi->ce_mask & VXLAN_ATTR_LINK)
 		NLA_PUT_U32(msg, IFLA_VXLAN_LINK, vxi->vxi_link);
 
-	if (vxi->vxi_mask & VXLAN_HAS_LOCAL)
+	if (vxi->ce_mask & VXLAN_ATTR_LOCAL)
 		NLA_PUT(msg, IFLA_VXLAN_LOCAL, sizeof(vxi->vxi_local), &vxi->vxi_local);
 
-	if (vxi->vxi_mask & VXLAN_HAS_LOCAL6)
+	if (vxi->ce_mask & VXLAN_ATTR_LOCAL6)
 		NLA_PUT(msg, IFLA_VXLAN_LOCAL6, sizeof(vxi->vxi_local6), &vxi->vxi_local6);
 
-	if (vxi->vxi_mask & VXLAN_HAS_TTL)
+	if (vxi->ce_mask & VXLAN_ATTR_TTL)
 		NLA_PUT_U8(msg, IFLA_VXLAN_TTL, vxi->vxi_ttl);
 
-	if (vxi->vxi_mask & VXLAN_HAS_TOS)
+	if (vxi->ce_mask & VXLAN_ATTR_TOS)
 		NLA_PUT_U8(msg, IFLA_VXLAN_TOS, vxi->vxi_tos);
 
-	if (vxi->vxi_mask & VXLAN_HAS_LEARNING)
+	if (vxi->ce_mask & VXLAN_ATTR_LEARNING)
 		NLA_PUT_U8(msg, IFLA_VXLAN_LEARNING, vxi->vxi_learning);
 
-	if (vxi->vxi_mask & VXLAN_HAS_AGEING)
+	if (vxi->ce_mask & VXLAN_ATTR_AGEING)
 		NLA_PUT_U32(msg, IFLA_VXLAN_AGEING, vxi->vxi_ageing);
 
-	if (vxi->vxi_mask & VXLAN_HAS_LIMIT)
+	if (vxi->ce_mask & VXLAN_ATTR_LIMIT)
 		NLA_PUT_U32(msg, IFLA_VXLAN_LIMIT, vxi->vxi_limit);
 
-	if (vxi->vxi_mask & VXLAN_HAS_PORT_RANGE)
+	if (vxi->ce_mask & VXLAN_ATTR_PORT_RANGE)
 		NLA_PUT(msg, IFLA_VXLAN_PORT_RANGE, sizeof(vxi->vxi_port_range),
 				&vxi->vxi_port_range);
 
-	if (vxi->vxi_mask & VXLAN_HAS_PROXY)
+	if (vxi->ce_mask & VXLAN_ATTR_PROXY)
 		NLA_PUT_U8(msg, IFLA_VXLAN_PROXY, vxi->vxi_proxy);
 
-	if (vxi->vxi_mask & VXLAN_HAS_RSC)
+	if (vxi->ce_mask & VXLAN_ATTR_RSC)
 		NLA_PUT_U8(msg, IFLA_VXLAN_RSC, vxi->vxi_rsc);
 
-	if (vxi->vxi_mask & VXLAN_HAS_L2MISS)
+	if (vxi->ce_mask & VXLAN_ATTR_L2MISS)
 		NLA_PUT_U8(msg, IFLA_VXLAN_L2MISS, vxi->vxi_l2miss);
 
-	if (vxi->vxi_mask & VXLAN_HAS_L3MISS)
+	if (vxi->ce_mask & VXLAN_ATTR_L3MISS)
 		NLA_PUT_U8(msg, IFLA_VXLAN_L3MISS, vxi->vxi_l3miss);
 
 	nla_nest_end(msg, data);
@@ -445,6 +445,34 @@ nla_put_failure:
 	return 0;
 }
 
+static int vxlan_compare(struct rtnl_link *link_a, struct rtnl_link *link_b,
+			uint32_t attrs, int flags)
+{
+	struct vxlan_info *a = link_a->l_info;
+	struct vxlan_info *b = link_b->l_info;
+	int diff = 0;
+
+#define VXLAN_DIFF(ATTR, EXPR) ATTR_DIFF(attrs, VXLAN_ATTR_##ATTR, a, b, EXPR)
+
+	diff |= VXLAN_DIFF(ID,    a->vxi_id    != b->vxi_id);
+	diff |= VXLAN_DIFF(GROUP, a->vxi_group != b->vxi_group);
+	diff |= VXLAN_DIFF(LINK,  a->vxi_link  != b->vxi_link);
+	diff |= VXLAN_DIFF(LOCAL, a->vxi_local != b->vxi_local);
+	diff |= VXLAN_DIFF(TOS,   a->vxi_tos   != b->vxi_tos);
+	diff |= VXLAN_DIFF(TTL,   a->vxi_ttl   != b->vxi_ttl);
+	diff |= VXLAN_DIFF(LEARNING, a->vxi_learning != b->vxi_learning);
+	diff |= VXLAN_DIFF(AGEING, a->vxi_ageing != b->vxi_ageing);
+	diff |= VXLAN_DIFF(PORT_RANGE,
+	                   a->vxi_port_range.low != b->vxi_port_range.low);
+	diff |= VXLAN_DIFF(PORT_RANGE,
+	                   a->vxi_port_range.high != b->vxi_port_range.high);
+	diff |= VXLAN_DIFF(GROUP6, memcmp(&a->vxi_group6, &b->vxi_group6, sizeof(a->vxi_group6)) != 0);
+	diff |= VXLAN_DIFF(LOCAL6,  memcmp(&a->vxi_local6, &b->vxi_local6, sizeof(a->vxi_local6)) != 0);
+#undef VXLAN_DIFF
+
+	return diff;
+}
+
 static struct rtnl_link_info_ops vxlan_info_ops = {
 	.io_name		= "vxlan",
 	.io_alloc		= vxlan_alloc,
@@ -456,6 +484,7 @@ static struct rtnl_link_info_ops vxlan_info_ops = {
 	.io_clone		= vxlan_clone,
 	.io_put_attrs		= vxlan_put_attrs,
 	.io_free		= vxlan_free,
+	.io_compare             = vxlan_compare,
 };
 
 /** @cond SKIP */
@@ -520,7 +549,7 @@ int rtnl_link_vxlan_set_id(struct rtnl_link *link, uint32_t id)
 		return -NLE_INVAL;
 
 	vxi->vxi_id = id;
-	vxi->vxi_mask |= VXLAN_HAS_ID;
+	vxi->ce_mask |= VXLAN_ATTR_ID;
 
 	return 0;
 }
@@ -541,7 +570,7 @@ int rtnl_link_vxlan_get_id(struct rtnl_link *link, uint32_t *id)
 	if(!id)
 		return -NLE_INVAL;
 
-	if (vxi->vxi_mask & VXLAN_HAS_ID)
+	if (vxi->ce_mask & VXLAN_ATTR_ID)
 		*id = vxi->vxi_id;
 	else
 		return -NLE_AGAIN;
@@ -566,14 +595,14 @@ int rtnl_link_vxlan_set_group(struct rtnl_link *link, struct nl_addr *addr)
 	    (nl_addr_get_len(addr) == sizeof(vxi->vxi_group))) {
 		memcpy(&vxi->vxi_group, nl_addr_get_binary_addr(addr),
 		       sizeof(vxi->vxi_group));
-		vxi->vxi_mask |= VXLAN_HAS_GROUP;
-		vxi->vxi_mask &= ~VXLAN_HAS_GROUP6;
+		vxi->ce_mask |= VXLAN_ATTR_GROUP;
+		vxi->ce_mask &= ~VXLAN_ATTR_GROUP6;
 	} else if ((nl_addr_get_family(addr) == AF_INET6) &&
 		   (nl_addr_get_len(addr) == sizeof(vxi->vxi_group6))) {
 		memcpy(&vxi->vxi_group6, nl_addr_get_binary_addr(addr),
 		       sizeof(vxi->vxi_group6));
-		vxi->vxi_mask |= VXLAN_HAS_GROUP6;
-		vxi->vxi_mask &= ~VXLAN_HAS_GROUP;
+		vxi->ce_mask |= VXLAN_ATTR_GROUP6;
+		vxi->ce_mask &= ~VXLAN_ATTR_GROUP;
 	} else
 		return -NLE_INVAL;
 
@@ -596,9 +625,9 @@ int rtnl_link_vxlan_get_group(struct rtnl_link *link, struct nl_addr **addr)
 	if (!addr)
 		return -NLE_INVAL;
 
-	if (vxi->vxi_mask & VXLAN_HAS_GROUP)
+	if (vxi->ce_mask & VXLAN_ATTR_GROUP)
 		*addr = nl_addr_build(AF_INET, &vxi->vxi_group, sizeof(vxi->vxi_group));
-	else if (vxi->vxi_mask & VXLAN_HAS_GROUP6)
+	else if (vxi->ce_mask & VXLAN_ATTR_GROUP6)
 		*addr = nl_addr_build(AF_INET6, &vxi->vxi_group6, sizeof(vxi->vxi_group6));
 	else
 		return -NLE_AGAIN;
@@ -620,7 +649,7 @@ int rtnl_link_vxlan_set_link(struct rtnl_link *link, uint32_t index)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_link = index;
-	vxi->vxi_mask |= VXLAN_HAS_LINK;
+	vxi->ce_mask |= VXLAN_ATTR_LINK;
 
 	return 0;
 }
@@ -641,7 +670,7 @@ int rtnl_link_vxlan_get_link(struct rtnl_link *link, uint32_t *index)
 	if (!index)
 		return -NLE_INVAL;
 
-	if (!(vxi->vxi_mask & VXLAN_HAS_LINK))
+	if (!(vxi->ce_mask & VXLAN_ATTR_LINK))
 		return -NLE_AGAIN;
 
 	*index = vxi->vxi_link;
@@ -666,14 +695,14 @@ int rtnl_link_vxlan_set_local(struct rtnl_link *link, struct nl_addr *addr)
 	    (nl_addr_get_len(addr) == sizeof(vxi->vxi_local))) {
 		memcpy(&vxi->vxi_local, nl_addr_get_binary_addr(addr),
 		       sizeof(vxi->vxi_local));
-		vxi->vxi_mask |= VXLAN_HAS_LOCAL;
-		vxi->vxi_mask &= VXLAN_HAS_LOCAL6;
+		vxi->ce_mask |= VXLAN_ATTR_LOCAL;
+		vxi->ce_mask &= VXLAN_ATTR_LOCAL6;
 	} else if ((nl_addr_get_family(addr) == AF_INET6) &&
 		   (nl_addr_get_len(addr) == sizeof(vxi->vxi_local6))) {
 		memcpy(&vxi->vxi_local6, nl_addr_get_binary_addr(addr),
 		       sizeof(vxi->vxi_local6));
-		vxi->vxi_mask |= VXLAN_HAS_LOCAL6;
-		vxi->vxi_mask &= ~VXLAN_HAS_LOCAL;
+		vxi->ce_mask |= VXLAN_ATTR_LOCAL6;
+		vxi->ce_mask &= ~VXLAN_ATTR_LOCAL;
 	} else
 		return -NLE_INVAL;
 
@@ -696,9 +725,9 @@ int rtnl_link_vxlan_get_local(struct rtnl_link *link, struct nl_addr **addr)
 	if (!addr)
 		return -NLE_INVAL;
 
-	if (vxi->vxi_mask & VXLAN_HAS_LOCAL)
+	if (vxi->ce_mask & VXLAN_ATTR_LOCAL)
 		*addr = nl_addr_build(AF_INET, &vxi->vxi_local, sizeof(vxi->vxi_local));
-	else if (vxi->vxi_mask & VXLAN_HAS_LOCAL6)
+	else if (vxi->ce_mask & VXLAN_ATTR_LOCAL6)
 		*addr = nl_addr_build(AF_INET6, &vxi->vxi_local6, sizeof(vxi->vxi_local6));
 	else
 		return -NLE_AGAIN;
@@ -720,7 +749,7 @@ int rtnl_link_vxlan_set_ttl(struct rtnl_link *link, uint8_t ttl)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_ttl = ttl;
-	vxi->vxi_mask |= VXLAN_HAS_TTL;
+	vxi->ce_mask |= VXLAN_ATTR_TTL;
 
 	return 0;
 }
@@ -737,7 +766,7 @@ int rtnl_link_vxlan_get_ttl(struct rtnl_link *link)
 
 	IS_VXLAN_LINK_ASSERT(link);
 
-	if (!(vxi->vxi_mask & VXLAN_HAS_TTL))
+	if (!(vxi->ce_mask & VXLAN_ATTR_TTL))
 		return -NLE_AGAIN;
 
 	return vxi->vxi_ttl;
@@ -757,7 +786,7 @@ int rtnl_link_vxlan_set_tos(struct rtnl_link *link, uint8_t tos)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_tos = tos;
-	vxi->vxi_mask |= VXLAN_HAS_TOS;
+	vxi->ce_mask |= VXLAN_ATTR_TOS;
 
 	return 0;
 }
@@ -774,7 +803,7 @@ int rtnl_link_vxlan_get_tos(struct rtnl_link *link)
 
 	IS_VXLAN_LINK_ASSERT(link);
 
-	if (!(vxi->vxi_mask & VXLAN_HAS_TOS))
+	if (!(vxi->ce_mask & VXLAN_ATTR_TOS))
 		return -NLE_AGAIN;
 
 	return vxi->vxi_tos;
@@ -794,7 +823,7 @@ int rtnl_link_vxlan_set_learning(struct rtnl_link *link, uint8_t learning)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_learning = learning;
-	vxi->vxi_mask |= VXLAN_HAS_LEARNING;
+	vxi->ce_mask |= VXLAN_ATTR_LEARNING;
 
 	return 0;
 }
@@ -811,7 +840,7 @@ int rtnl_link_vxlan_get_learning(struct rtnl_link *link)
 
 	IS_VXLAN_LINK_ASSERT(link);
 
-	if (!(vxi->vxi_mask & VXLAN_HAS_LEARNING))
+	if (!(vxi->ce_mask & VXLAN_ATTR_LEARNING))
 		return -NLE_AGAIN;
 
 	return vxi->vxi_learning;
@@ -853,7 +882,7 @@ int rtnl_link_vxlan_set_ageing(struct rtnl_link *link, uint32_t expiry)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_ageing = expiry;
-	vxi->vxi_mask |= VXLAN_HAS_AGEING;
+	vxi->ce_mask |= VXLAN_ATTR_AGEING;
 
 	return 0;
 }
@@ -874,7 +903,7 @@ int rtnl_link_vxlan_get_ageing(struct rtnl_link *link, uint32_t *expiry)
 	if (!expiry)
 		return -NLE_INVAL;
 
-	if (vxi->vxi_mask & VXLAN_HAS_AGEING)
+	if (vxi->ce_mask & VXLAN_ATTR_AGEING)
 		*expiry = vxi->vxi_ageing;
 	else
 		return -NLE_AGAIN;
@@ -896,7 +925,7 @@ int rtnl_link_vxlan_set_limit(struct rtnl_link *link, uint32_t limit)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_limit = limit;
-	vxi->vxi_mask |= VXLAN_HAS_LIMIT;
+	vxi->ce_mask |= VXLAN_ATTR_LIMIT;
 
 	return 0;
 }
@@ -917,7 +946,7 @@ int rtnl_link_vxlan_get_limit(struct rtnl_link *link, uint32_t *limit)
 	if (!limit)
 		return -NLE_INVAL;
 
-	if (vxi->vxi_mask & VXLAN_HAS_LIMIT)
+	if (vxi->ce_mask & VXLAN_ATTR_LIMIT)
 		*limit = vxi->vxi_limit;
 	else
 		return -NLE_AGAIN;
@@ -943,7 +972,7 @@ int rtnl_link_vxlan_set_port_range(struct rtnl_link *link,
 		return -NLE_INVAL;
 
 	memcpy(&vxi->vxi_port_range, range, sizeof(vxi->vxi_port_range));
-	vxi->vxi_mask |= VXLAN_HAS_PORT_RANGE;
+	vxi->ce_mask |= VXLAN_ATTR_PORT_RANGE;
 
 	return 0;
 }
@@ -965,7 +994,7 @@ int rtnl_link_vxlan_get_port_range(struct rtnl_link *link,
 	if (!range)
 		return -NLE_INVAL;
 
-	if (vxi->vxi_mask & VXLAN_HAS_PORT_RANGE)
+	if (vxi->ce_mask & VXLAN_ATTR_PORT_RANGE)
 		memcpy(range, &vxi->vxi_port_range, sizeof(*range));
 	else
 		return -NLE_AGAIN;
@@ -987,7 +1016,7 @@ int rtnl_link_vxlan_set_proxy(struct rtnl_link *link, uint8_t proxy)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_proxy = proxy;
-	vxi->vxi_mask |= VXLAN_HAS_PROXY;
+	vxi->ce_mask |= VXLAN_ATTR_PROXY;
 
 	return 0;
 }
@@ -1004,7 +1033,7 @@ int rtnl_link_vxlan_get_proxy(struct rtnl_link *link)
 
 	IS_VXLAN_LINK_ASSERT(link);
 
-	if (!(vxi->vxi_mask & VXLAN_HAS_PROXY))
+	if (!(vxi->ce_mask & VXLAN_ATTR_PROXY))
 		return -NLE_AGAIN;
 
 	return vxi->vxi_proxy;
@@ -1046,7 +1075,7 @@ int rtnl_link_vxlan_set_rsc(struct rtnl_link *link, uint8_t rsc)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_rsc = rsc;
-	vxi->vxi_mask |= VXLAN_HAS_RSC;
+	vxi->ce_mask |= VXLAN_ATTR_RSC;
 
 	return 0;
 }
@@ -1063,7 +1092,7 @@ int rtnl_link_vxlan_get_rsc(struct rtnl_link *link)
 
 	IS_VXLAN_LINK_ASSERT(link);
 
-	if (!(vxi->vxi_mask & VXLAN_HAS_RSC))
+	if (!(vxi->ce_mask & VXLAN_ATTR_RSC))
 		return -NLE_AGAIN;
 
 	return vxi->vxi_rsc;
@@ -1105,7 +1134,7 @@ int rtnl_link_vxlan_set_l2miss(struct rtnl_link *link, uint8_t miss)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_l2miss = miss;
-	vxi->vxi_mask |= VXLAN_HAS_L2MISS;
+	vxi->ce_mask |= VXLAN_ATTR_L2MISS;
 
 	return 0;
 }
@@ -1122,7 +1151,7 @@ int rtnl_link_vxlan_get_l2miss(struct rtnl_link *link)
 
 	IS_VXLAN_LINK_ASSERT(link);
 
-	if (!(vxi->vxi_mask & VXLAN_HAS_L2MISS))
+	if (!(vxi->ce_mask & VXLAN_ATTR_L2MISS))
 		return -NLE_AGAIN;
 
 	return vxi->vxi_l2miss;
@@ -1164,7 +1193,7 @@ int rtnl_link_vxlan_set_l3miss(struct rtnl_link *link, uint8_t miss)
 	IS_VXLAN_LINK_ASSERT(link);
 
 	vxi->vxi_l3miss = miss;
-	vxi->vxi_mask |= VXLAN_HAS_L3MISS;
+	vxi->ce_mask |= VXLAN_ATTR_L3MISS;
 
 	return 0;
 }
@@ -1181,7 +1210,7 @@ int rtnl_link_vxlan_get_l3miss(struct rtnl_link *link)
 
 	IS_VXLAN_LINK_ASSERT(link);
 
-	if (!(vxi->vxi_mask & VXLAN_HAS_L3MISS))
+	if (!(vxi->ce_mask & VXLAN_ATTR_L3MISS))
 		return -NLE_AGAIN;
 
 	return vxi->vxi_l3miss;
diff --git a/lib/utils.c b/lib/utils.c
index ca98ab3..3258946 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -1158,7 +1158,7 @@ int nl_has_capability (int capability)
 			NL_CAPABILITY_RTNL_LINK_VLAN_PROTOCOL_SERIALZE,
 			NL_CAPABILITY_RTNL_LINK_PARSE_GRE_REMOTE,
 			NL_CAPABILITY_RTNL_LINK_VLAN_INGRESS_MAP_CLEAR,
-			0,
+			NL_CAPABILITY_RTNL_LINK_VXLAN_IO_COMPARE,
 			0),
 		/* IMPORTANT: these capability numbers are intended to be universal and stable
 		 * for libnl3. Don't allocate new numbers on your own that differ from upstream