bonding: add lp_interval attribute netlink support

Add IFLA_BOND_LP_INTERVAL to allow get/set of bonding parameter
lp_interval via netlink.

Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
index ac9a10c..6c8339b 100644
--- a/drivers/net/bonding/bond_netlink.c
+++ b/drivers/net/bonding/bond_netlink.c
@@ -40,6 +40,7 @@
 	[IFLA_BOND_NUM_PEER_NOTIF]	= { .type = NLA_U8 },
 	[IFLA_BOND_ALL_SLAVES_ACTIVE]	= { .type = NLA_U8 },
 	[IFLA_BOND_MIN_LINKS]		= { .type = NLA_U32 },
+	[IFLA_BOND_LP_INTERVAL]		= { .type = NLA_U32 },
 };
 
 static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
@@ -232,6 +233,14 @@
 		if (err)
 			return err;
 	}
+	if (data[IFLA_BOND_LP_INTERVAL]) {
+		int lp_interval =
+			nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
+
+		err = bond_option_lp_interval_set(bond, lp_interval);
+		if (err)
+			return err;
+	}
 	return 0;
 }
 
@@ -268,6 +277,7 @@
 		nla_total_size(sizeof(u8)) +	/* IFLA_BOND_NUM_PEER_NOTIF */
 		nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
 		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_MIN_LINKS */
+		nla_total_size(sizeof(u32)) +	/* IFLA_BOND_LP_INTERVAL */
 		0;
 }
 
@@ -360,6 +370,10 @@
 			bond->params.min_links))
 		goto nla_put_failure;
 
+	if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
+			bond->params.lp_interval))
+		goto nla_put_failure;
+
 	return 0;
 
 nla_put_failure: