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Commit 4f66f666 authored by Subash Abhinov Kasiviswanathan's avatar Subash Abhinov Kasiviswanathan
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net: qualcomm: rmnet: Allow to configure flags for existing devices 



Add an option to configure the mux id, aggregation and commad feature
for existing rmnet devices. Implement the changelink netlink
operation for this.

CRs-Fixed: 2156182
Change-Id: Ib6b389bb737599534d2ea11272767f30c4998caf
Signed-off-by: default avatarSubash Abhinov Kasiviswanathan <subashab@codeaurora.org>
parent cfd6d488

drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c

+40 −0
Original line number Diff line number Diff line
@@ -320,6 +320,45 @@ static int rmnet_rtnl_validate(struct nlattr *tb[], struct nlattr *data[], 
	return 0;

}



static int rmnet_changelink(struct net_device *dev, struct nlattr *tb[],

			    struct nlattr *data[],

			    struct netlink_ext_ack *extack)

{

	struct rmnet_priv *priv = netdev_priv(dev);

	struct net_device *real_dev;

	struct rmnet_endpoint *ep;

	struct rmnet_port *port;

	u16 mux_id;



	real_dev = __dev_get_by_index(dev_net(dev),

				      nla_get_u32(tb[IFLA_LINK]));



	if (!real_dev || !dev || !rmnet_is_real_dev_registered(real_dev))

		return -ENODEV;



	port = rmnet_get_port_rtnl(real_dev);



	if (data[IFLA_VLAN_ID]) {

		mux_id = nla_get_u16(data[IFLA_VLAN_ID]);

		ep = rmnet_get_endpoint(port, priv->mux_id);



		hlist_del_init_rcu(&ep->hlnode);

		hlist_add_head_rcu(&ep->hlnode, &port->muxed_ep[mux_id]);



		ep->mux_id = mux_id;

		priv->mux_id = mux_id;

	}



	if (data[IFLA_VLAN_FLAGS]) {

		struct ifla_vlan_flags *flags;



		flags = nla_data(data[IFLA_VLAN_FLAGS]);

		port->ingress_data_format = flags->flags & flags->mask;

	}



	return 0;

}



static size_t rmnet_get_size(const struct net_device *dev)

{

	return nla_total_size(2) /* IFLA_VLAN_ID */ +
@@ -335,6 +374,7 @@ struct rtnl_link_ops rmnet_link_ops __read_mostly = { 
	.newlink	= rmnet_newlink,

	.dellink	= rmnet_dellink,

	.get_size	= rmnet_get_size,

	.changelink     = rmnet_changelink,

};



/* Needs either rcu_read_lock() or rtnl lock */