[PATCH net-next v4 5/5] net: qualcomm: rmnet: Implement fill_info

[Subash Abhinov Kasiviswanathan]

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

Signed-off-by: Subash Abhinov Kasiviswanathan <subas...@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 c5b7b2a..38d9356 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
@@ -339,6 +339,35 @@ static size_t rmnet_get_size(const struct net_device *dev)
                nla_total_size(sizeof(struct ifla_rmnet_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_rmnet_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_RMNET_MUX_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_RMNET_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_RMNET_MAX,
@@ -350,6 +379,7 @@ struct rtnl_link_ops rmnet_link_ops __read_mostly = {
        .get_size       = rmnet_get_size,
        .changelink     = rmnet_changelink,
        .policy         = rmnet_policy,
+       .fill_info      = rmnet_fill_info,
 };
 
 /* Needs either rcu_read_lock() or rtnl lock */
-- 
1.9.1