/* Modifies packet as per logical endpoint configuration and egress data format
* for egress device configured in logical endpoint. Packet is then transmitted
* on the egress device.
*/
void rmnet_egress_handler(struct sk_buff *skb)
{
struct net_device *orig_dev;
struct rmnet_port *port;
struct rmnet_priv *priv;
u8 mux_id;
sk_pacing_shift_update(skb->sk, 8);
orig_dev = skb->dev;
priv = netdev_priv(orig_dev);
skb->dev = priv->real_dev;
mux_id = priv->mux_id;
port = rmnet_get_port(skb->dev);
if (!port)
goto drop;
if (rmnet_map_egress_handler(skb, port, mux_id, orig_dev))
goto drop;
rmnet_vnd_tx_fixup(skb, orig_dev);
dev_queue_xmit(skb);
return;
drop:
this_cpu_inc(priv->pcpu_stats->stats.tx_drops);
kfree_skb(skb);
}
/**
* rmnet_egress_handler() - Egress handler entry point
* @skb: packet to transmit
* @ep: logical endpoint configuration of the packet originator
* (e.g.. RmNet virtual network device)
*
* Modifies packet as per logical endpoint configuration and egress data format
* for egress device configured in logical endpoint. Packet is then transmitted
* on the egress device.
*/
void rmnet_egress_handler(struct sk_buff *skb,
struct rmnet_logical_ep_conf_s *ep)
{
struct rmnet_phys_ep_conf_s *config;
struct net_device *orig_dev;
int rc;
orig_dev = skb->dev;
skb->dev = ep->egress_dev;
config = (struct rmnet_phys_ep_conf_s *)
rcu_dereference(skb->dev->rx_handler_data);
if (!config) {
LOGD("%s is not associated with rmnet_data", skb->dev->name);
kfree_skb(skb);
return;
}
LOGD("Packet going out on %s with egress format 0x%08X",
skb->dev->name, config->egress_data_format);
if (config->egress_data_format & RMNET_EGRESS_FORMAT_MAP) {
switch (rmnet_map_egress_handler(skb, config, ep, orig_dev)) {
case RMNET_MAP_CONSUMED:
LOGD("%s", "MAP process consumed packet");
return;
case RMNET_MAP_SUCCESS:
break;
default:
LOGD("MAP egress failed on packet on %s",
skb->dev->name);
rmnet_kfree_skb(skb, RMNET_STATS_SKBFREE_EGR_MAPFAIL);
return;
}
}
if (ep->rmnet_mode == RMNET_EPMODE_VND)
rmnet_vnd_tx_fixup(skb, orig_dev);
rmnet_print_packet(skb, skb->dev->name, 't');
trace_rmnet_egress_handler(skb);
rc = dev_queue_xmit(skb);
if (rc != 0) {
LOGD("Failed to queue packet for transmission on [%s]",
skb->dev->name);
}
rmnet_stats_queue_xmit(rc, RMNET_STATS_QUEUE_XMIT_EGRESS);
}
/* Modifies packet as per logical endpoint configuration and egress data format
* for egress device configured in logical endpoint. Packet is then transmitted
* on the egress device.
*/
void rmnet_egress_handler(struct sk_buff *skb)
{
struct net_device *orig_dev;
struct rmnet_port *port;
struct rmnet_priv *priv;
u8 mux_id;
orig_dev = skb->dev;
priv = netdev_priv(orig_dev);
skb->dev = priv->real_dev;
mux_id = priv->mux_id;
port = rmnet_get_port(skb->dev);
if (!port) {
kfree_skb(skb);
return;
}
if (port->egress_data_format & RMNET_EGRESS_FORMAT_MAP) {
switch (rmnet_map_egress_handler(skb, port, mux_id, orig_dev)) {
case RMNET_MAP_CONSUMED:
return;
case RMNET_MAP_SUCCESS:
break;
default:
kfree_skb(skb);
return;
}
}
rmnet_vnd_tx_fixup(skb, orig_dev);
dev_queue_xmit(skb);
}