xps: Add CONFIG_XPS
This patch adds XPS_CONFIG option to enable and disable XPS. This is
done in the same manner as RPS_CONFIG. This is also fixes build
failure in XPS code when SMP is not enabled.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index c852f00..3259d2c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1567,6 +1567,9 @@
rc = netdev_queue_update_kobjects(dev, dev->real_num_tx_queues,
txq);
+ if (rc)
+ return rc;
+
if (txq < dev->real_num_tx_queues)
qdisc_reset_all_tx_gt(dev, txq);
}
@@ -2148,7 +2151,7 @@
static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb)
{
-#ifdef CONFIG_RPS
+#ifdef CONFIG_XPS
struct xps_dev_maps *dev_maps;
struct xps_map *map;
int queue_index = -1;
@@ -5085,9 +5088,9 @@
}
EXPORT_SYMBOL(netif_stacked_transfer_operstate);
+#ifdef CONFIG_RPS
static int netif_alloc_rx_queues(struct net_device *dev)
{
-#ifdef CONFIG_RPS
unsigned int i, count = dev->num_rx_queues;
struct netdev_rx_queue *rx;
@@ -5102,9 +5105,9 @@
for (i = 0; i < count; i++)
rx[i].dev = dev;
-#endif
return 0;
}
+#endif
static int netif_alloc_netdev_queues(struct net_device *dev)
{
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 68dbbfd..99c1129 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -751,10 +751,12 @@
return error;
}
+#endif /* CONFIG_RPS */
int
net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
{
+#ifdef CONFIG_RPS
int i;
int error = 0;
@@ -770,8 +772,12 @@
kobject_put(&net->_rx[i].kobj);
return error;
+#else
+ return 0;
+#endif
}
+#ifdef CONFIG_XPS
/*
* netdev_queue sysfs structures and functions.
*/
@@ -1090,10 +1096,12 @@
return error;
}
+#endif /* CONFIG_XPS */
int
netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
{
+#ifdef CONFIG_XPS
int i;
int error = 0;
@@ -1109,27 +1117,36 @@
kobject_put(&net->_tx[i].kobj);
return error;
+#else
+ return 0;
+#endif
}
static int register_queue_kobjects(struct net_device *net)
{
- int error = 0, txq = 0, rxq = 0;
+ int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
+#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
net->queues_kset = kset_create_and_add("queues",
NULL, &net->dev.kobj);
if (!net->queues_kset)
return -ENOMEM;
+#endif
- error = net_rx_queue_update_kobjects(net, 0, net->real_num_rx_queues);
+#ifdef CONFIG_RPS
+ real_rx = net->real_num_rx_queues;
+#endif
+ real_tx = net->real_num_tx_queues;
+
+ error = net_rx_queue_update_kobjects(net, 0, real_rx);
if (error)
goto error;
- rxq = net->real_num_rx_queues;
+ rxq = real_rx;
- error = netdev_queue_update_kobjects(net, 0,
- net->real_num_tx_queues);
+ error = netdev_queue_update_kobjects(net, 0, real_tx);
if (error)
goto error;
- txq = net->real_num_tx_queues;
+ txq = real_tx;
return 0;
@@ -1141,11 +1158,19 @@
static void remove_queue_kobjects(struct net_device *net)
{
- net_rx_queue_update_kobjects(net, net->real_num_rx_queues, 0);
- netdev_queue_update_kobjects(net, net->real_num_tx_queues, 0);
+ int real_rx = 0, real_tx = 0;
+
+#ifdef CONFIG_RPS
+ real_rx = net->real_num_rx_queues;
+#endif
+ real_tx = net->real_num_tx_queues;
+
+ net_rx_queue_update_kobjects(net, real_rx, 0);
+ netdev_queue_update_kobjects(net, real_tx, 0);
+#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
kset_unregister(net->queues_kset);
+#endif
}
-#endif /* CONFIG_RPS */
static const void *net_current_ns(void)
{
@@ -1244,9 +1269,7 @@
kobject_get(&dev->kobj);
-#ifdef CONFIG_RPS
remove_queue_kobjects(net);
-#endif
device_del(dev);
}
@@ -1285,13 +1308,11 @@
if (error)
return error;
-#ifdef CONFIG_RPS
error = register_queue_kobjects(net);
if (error) {
device_del(dev);
return error;
}
-#endif
return error;
}
diff --git a/net/core/net-sysfs.h b/net/core/net-sysfs.h
index 25ec2ee..bd7751e 100644
--- a/net/core/net-sysfs.h
+++ b/net/core/net-sysfs.h
@@ -4,11 +4,8 @@
int netdev_kobject_init(void);
int netdev_register_kobject(struct net_device *);
void netdev_unregister_kobject(struct net_device *);
-#ifdef CONFIG_RPS
int net_rx_queue_update_kobjects(struct net_device *, int old_num, int new_num);
int netdev_queue_update_kobjects(struct net_device *net,
int old_num, int new_num);
#endif
-
-#endif
