[PATCH net-next v3 4/4] net: qualcomm: rmnet: Implement fill_info

[Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>]

This is needed to query the mux_id and flags of a rmnet device.

Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
---
 drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
index 096301a..d0f3e0f 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
@@ -331,6 +331,35 @@ static size_t rmnet_get_size(const struct net_device *dev)
 	       nla_total_size(sizeof(struct ifla_vlan_flags)); /* IFLA_VLAN_FLAGS */
 }
 
+static int rmnet_fill_info(struct sk_buff *skb, const struct net_device *dev)
+{
+	struct rmnet_priv *priv = netdev_priv(dev);
+	struct net_device *real_dev;
+	struct ifla_vlan_flags f;
+	struct rmnet_port *port;
+
+	real_dev = priv->real_dev;
+
+	if (!rmnet_is_real_dev_registered(real_dev))
+		return -ENODEV;
+
+	if (nla_put_u16(skb, IFLA_VLAN_ID, priv->mux_id))
+		goto nla_put_failure;
+
+	port = rmnet_get_port_rtnl(real_dev);
+
+	f.flags = port->data_format;
+	f.mask  = ~0;
+
+	if (nla_put(skb, IFLA_VLAN_FLAGS, sizeof(f), &f))
+		goto nla_put_failure;
+
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
 struct rtnl_link_ops rmnet_link_ops __read_mostly = {
 	.kind		= "rmnet",
 	.maxtype	= __IFLA_VLAN_MAX,
@@ -341,6 +370,7 @@ struct rtnl_link_ops rmnet_link_ops __read_mostly = {
 	.dellink	= rmnet_dellink,
 	.get_size	= rmnet_get_size,
 	.changelink     = rmnet_changelink,
+	.fill_info	= rmnet_fill_info,
 };
 
 /* Needs either rcu_read_lock() or rtnl lock */
-- 
1.9.1