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net: qualcomm: rmnet: Allow to configure flags for existing devices

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

Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Subash Abhinov Kasiviswanathan 2017-12-11 17:30:15 -07:00 committed by David S. Miller
parent 6b8ecc23f2
commit 23790ef120
1 changed files with 40 additions and 0 deletions
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40
drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
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@ -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 */