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net: qualcomm: rmnet: Convert the muxed endpoint to hlist

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Rather than using a static array, use a hlist to store the muxed
endpoints and use the mux id to query the rmnet_device.
This is useful as usually very few mux ids are used.

Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Cc: Dan Williams <dcbw@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Subash Abhinov Kasiviswanathan 2017-10-11 18:43:57 -06:00 committed by David S. Miller
parent 5451237ff7
commit 3352e6c457
6 changed files with 68 additions and 53 deletions
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75
drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c
View File

@ -61,18 +61,6 @@ rmnet_get_port_rtnl(const struct net_device *real_dev)
return rtnl_dereference(real_dev->rx_handler_data);
}
static struct rmnet_endpoint*
rmnet_get_endpoint(struct net_device *dev, int config_id)
{
struct rmnet_endpoint *ep;
struct rmnet_port *port;
port = rmnet_get_port_rtnl(dev);
ep = &port->muxed_ep[config_id];
return ep;
}
static int rmnet_unregister_real_device(struct net_device *real_dev,
struct rmnet_port *port)
{
@ -93,7 +81,7 @@ static int rmnet_unregister_real_device(struct net_device *real_dev,
static int rmnet_register_real_device(struct net_device *real_dev)
{
struct rmnet_port *port;
int rc;
int rc, entry;
ASSERT_RTNL();
@ -114,26 +102,13 @@ static int rmnet_register_real_device(struct net_device *real_dev)
/* hold on to real dev for MAP data */
dev_hold(real_dev);
for (entry = 0; entry < RMNET_MAX_LOGICAL_EP; entry++)
INIT_HLIST_HEAD(&port->muxed_ep[entry]);
netdev_dbg(real_dev, "registered with rmnet\n");
return 0;
}
static void rmnet_set_endpoint_config(struct net_device *dev,
u8 mux_id, struct net_device *egress_dev)
{
struct rmnet_endpoint *ep;
netdev_dbg(dev, "id %d dev %s\n", mux_id, egress_dev->name);
ep = rmnet_get_endpoint(dev, mux_id);
/* This config is cleared on every set, so its ok to not
* clear it on a device delete.
*/
memset(ep, 0, sizeof(struct rmnet_endpoint));
ep->egress_dev = egress_dev;
ep->mux_id = mux_id;
}
static int rmnet_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
@ -145,6 +120,7 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
RMNET_EGRESS_FORMAT_MAP;
struct net_device *real_dev;
int mode = RMNET_EPMODE_VND;
struct rmnet_endpoint *ep;
struct rmnet_port *port;
int err = 0;
u16 mux_id;
@ -156,6 +132,10 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
if (!data[IFLA_VLAN_ID])
return -EINVAL;
ep = kzalloc(sizeof(*ep), GFP_ATOMIC);
if (!ep)
return -ENOMEM;
mux_id = nla_get_u16(data[IFLA_VLAN_ID]);
err = rmnet_register_real_device(real_dev);
@ -163,7 +143,7 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
goto err0;
port = rmnet_get_port_rtnl(real_dev);
err = rmnet_vnd_newlink(mux_id, dev, port, real_dev);
err = rmnet_vnd_newlink(mux_id, dev, port, real_dev, ep);
if (err)
goto err1;
@ -177,11 +157,11 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
port->ingress_data_format = ingress_format;
port->rmnet_mode = mode;
rmnet_set_endpoint_config(real_dev, mux_id, dev);
hlist_add_head_rcu(&ep->hlnode, &port->muxed_ep[mux_id]);
return 0;
err2:
rmnet_vnd_dellink(mux_id, port);
rmnet_vnd_dellink(mux_id, port, ep);
err1:
rmnet_unregister_real_device(real_dev, port);
err0:
@ -191,6 +171,7 @@ static int rmnet_newlink(struct net *src_net, struct net_device *dev,
static void rmnet_dellink(struct net_device *dev, struct list_head *head)
{
struct net_device *real_dev;
struct rmnet_endpoint *ep;
struct rmnet_port *port;
u8 mux_id;
@ -204,8 +185,15 @@ static void rmnet_dellink(struct net_device *dev, struct list_head *head)
port = rmnet_get_port_rtnl(real_dev);
mux_id = rmnet_vnd_get_mux(dev);
rmnet_vnd_dellink(mux_id, port);
netdev_upper_dev_unlink(dev, real_dev);
ep = rmnet_get_endpoint(port, mux_id);
if (ep) {
hlist_del_init_rcu(&ep->hlnode);
rmnet_vnd_dellink(mux_id, port, ep);
kfree(ep);
}
rmnet_unregister_real_device(real_dev, port);
unregister_netdevice_queue(dev, head);
@ -214,11 +202,16 @@ static void rmnet_dellink(struct net_device *dev, struct list_head *head)
static int rmnet_dev_walk_unreg(struct net_device *rmnet_dev, void *data)
{
struct rmnet_walk_data *d = data;
struct rmnet_endpoint *ep;
u8 mux_id;
mux_id = rmnet_vnd_get_mux(rmnet_dev);
rmnet_vnd_dellink(mux_id, d->port);
ep = rmnet_get_endpoint(d->port, mux_id);
if (ep) {
hlist_del_init_rcu(&ep->hlnode);
rmnet_vnd_dellink(mux_id, d->port, ep);
kfree(ep);
}
netdev_upper_dev_unlink(rmnet_dev, d->real_dev);
unregister_netdevice_queue(rmnet_dev, d->head);
@ -316,6 +309,18 @@ struct rmnet_port *rmnet_get_port(struct net_device *real_dev)
return NULL;
}
struct rmnet_endpoint *rmnet_get_endpoint(struct rmnet_port *port, u8 mux_id)
{
struct rmnet_endpoint *ep;
hlist_for_each_entry_rcu(ep, &port->muxed_ep[mux_id], hlnode) {
if (ep->mux_id == mux_id)
return ep;
}
return NULL;
}
/* Startup/Shutdown */
static int __init rmnet_init(void)

4
drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h
View File

@ -23,6 +23,7 @@
struct rmnet_endpoint {
u8 mux_id;
struct net_device *egress_dev;
struct hlist_node hlnode;
};
/* One instance of this structure is instantiated for each real_dev associated
@ -30,11 +31,11 @@ struct rmnet_endpoint {
*/
struct rmnet_port {
struct net_device *dev;
struct rmnet_endpoint muxed_ep[RMNET_MAX_LOGICAL_EP];
u32 ingress_data_format;
u32 egress_data_format;
u8 nr_rmnet_devs;
u8 rmnet_mode;
struct hlist_head muxed_ep[RMNET_MAX_LOGICAL_EP];
};
extern struct rtnl_link_ops rmnet_link_ops;
@ -45,5 +46,6 @@ struct rmnet_priv {
};
struct rmnet_port *rmnet_get_port(struct net_device *real_dev);
struct rmnet_endpoint *rmnet_get_endpoint(struct rmnet_port *port, u8 mux_id);
#endif /* _RMNET_CONFIG_H_ */

17
drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
View File

@ -71,19 +71,18 @@ __rmnet_map_ingress_handler(struct sk_buff *skb,
& RMNET_INGRESS_FORMAT_MAP_COMMANDS)
return rmnet_map_command(skb, port);
kfree_skb(skb);
return RX_HANDLER_CONSUMED;
goto free_skb;
}
mux_id = RMNET_MAP_GET_MUX_ID(skb);
len = RMNET_MAP_GET_LENGTH(skb) - RMNET_MAP_GET_PAD(skb);
if (mux_id >= RMNET_MAX_LOGICAL_EP) {
kfree_skb(skb);
return RX_HANDLER_CONSUMED;
}
if (mux_id >= RMNET_MAX_LOGICAL_EP)
goto free_skb;
ep = &port->muxed_ep[mux_id];
ep = rmnet_get_endpoint(port, mux_id);
if (!ep)
goto free_skb;
if (port->ingress_data_format & RMNET_INGRESS_FORMAT_DEMUXING)
skb->dev = ep->egress_dev;
@ -93,6 +92,10 @@ __rmnet_map_ingress_handler(struct sk_buff *skb,
skb_trim(skb, len);
rmnet_set_skb_proto(skb);
return rmnet_deliver_skb(skb);
free_skb:
kfree_skb(skb);
return RX_HANDLER_CONSUMED;
}
static rx_handler_result_t

4
drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c
View File

@ -17,7 +17,7 @@
#include "rmnet_vnd.h"
static u8 rmnet_map_do_flow_control(struct sk_buff *skb,
struct rmnet_port *rdinfo,
struct rmnet_port *port,
int enable)
{
struct rmnet_map_control_command *cmd;
@ -37,7 +37,7 @@ static u8 rmnet_map_do_flow_control(struct sk_buff *skb,
return RX_HANDLER_CONSUMED;
}
ep = &rdinfo->muxed_ep[mux_id];
ep = rmnet_get_endpoint(port, mux_id);
vnd = ep->egress_dev;
ip_family = cmd->flow_control.ip_family;

15
drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
View File

@ -100,17 +100,19 @@ void rmnet_vnd_setup(struct net_device *rmnet_dev)
int rmnet_vnd_newlink(u8 id, struct net_device *rmnet_dev,
struct rmnet_port *port,
struct net_device *real_dev)
struct net_device *real_dev,
struct rmnet_endpoint *ep)
{
struct rmnet_priv *priv;
int rc;
if (port->muxed_ep[id].egress_dev)
if (ep->egress_dev)
return -EINVAL;
rc = register_netdevice(rmnet_dev);
if (!rc) {
port->muxed_ep[id].egress_dev = rmnet_dev;
ep->egress_dev = rmnet_dev;
ep->mux_id = id;
port->nr_rmnet_devs++;
rmnet_dev->rtnl_link_ops = &rmnet_link_ops;
@ -125,12 +127,13 @@ int rmnet_vnd_newlink(u8 id, struct net_device *rmnet_dev,
return rc;
}
int rmnet_vnd_dellink(u8 id, struct rmnet_port *port)
int rmnet_vnd_dellink(u8 id, struct rmnet_port *port,
struct rmnet_endpoint *ep)
{
if (id >= RMNET_MAX_LOGICAL_EP || !port->muxed_ep[id].egress_dev)
if (id >= RMNET_MAX_LOGICAL_EP || !ep->egress_dev)
return -EINVAL;
port->muxed_ep[id].egress_dev = NULL;
ep->egress_dev = NULL;
port->nr_rmnet_devs--;
return 0;
}

6
drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.h
View File

@ -19,8 +19,10 @@
int rmnet_vnd_do_flow_control(struct net_device *dev, int enable);
int rmnet_vnd_newlink(u8 id, struct net_device *rmnet_dev,
struct rmnet_port *port,
struct net_device *real_dev);
int rmnet_vnd_dellink(u8 id, struct rmnet_port *port);
struct net_device *real_dev,
struct rmnet_endpoint *ep);
int rmnet_vnd_dellink(u8 id, struct rmnet_port *port,
struct rmnet_endpoint *ep);
void rmnet_vnd_rx_fixup(struct sk_buff *skb, struct net_device *dev);
void rmnet_vnd_tx_fixup(struct sk_buff *skb, struct net_device *dev);
u8 rmnet_vnd_get_mux(struct net_device *rmnet_dev);