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-rw-r--r--include/linux/netpoll.h42
1 files changed, 24 insertions, 18 deletions
diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index 28f5389c924b..66d5379c305e 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -23,6 +23,7 @@ struct netpoll {
u8 remote_mac[ETH_ALEN];
struct list_head rx; /* rx_np list element */
+ struct rcu_head rcu;
};
struct netpoll_info {
@@ -38,28 +39,40 @@ struct netpoll_info {
struct delayed_work tx_work;
struct netpoll *netpoll;
+ struct rcu_head rcu;
};
void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
void netpoll_print_options(struct netpoll *np);
int netpoll_parse_options(struct netpoll *np, char *opt);
-int __netpoll_setup(struct netpoll *np, struct net_device *ndev);
+int __netpoll_setup(struct netpoll *np, struct net_device *ndev, gfp_t gfp);
int netpoll_setup(struct netpoll *np);
int netpoll_trap(void);
void netpoll_set_trap(int trap);
void __netpoll_cleanup(struct netpoll *np);
+void __netpoll_free_rcu(struct netpoll *np);
void netpoll_cleanup(struct netpoll *np);
-int __netpoll_rx(struct sk_buff *skb);
+int __netpoll_rx(struct sk_buff *skb, struct netpoll_info *npinfo);
void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
struct net_device *dev);
static inline void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
{
+ unsigned long flags;
+ local_irq_save(flags);
netpoll_send_skb_on_dev(np, skb, np->dev);
+ local_irq_restore(flags);
}
#ifdef CONFIG_NETPOLL
+static inline bool netpoll_rx_on(struct sk_buff *skb)
+{
+ struct netpoll_info *npinfo = rcu_dereference_bh(skb->dev->npinfo);
+
+ return npinfo && (!list_empty(&npinfo->rx_np) || npinfo->rx_flags);
+}
+
static inline bool netpoll_rx(struct sk_buff *skb)
{
struct netpoll_info *npinfo;
@@ -67,14 +80,14 @@ static inline bool netpoll_rx(struct sk_buff *skb)
bool ret = false;
local_irq_save(flags);
- npinfo = rcu_dereference_bh(skb->dev->npinfo);
- if (!npinfo || (list_empty(&npinfo->rx_np) && !npinfo->rx_flags))
+ if (!netpoll_rx_on(skb))
goto out;
+ npinfo = rcu_dereference_bh(skb->dev->npinfo);
spin_lock(&npinfo->rx_lock);
/* check rx_flags again with the lock held */
- if (npinfo->rx_flags && __netpoll_rx(skb))
+ if (npinfo->rx_flags && __netpoll_rx(skb, npinfo))
ret = true;
spin_unlock(&npinfo->rx_lock);
@@ -83,13 +96,6 @@ out:
return ret;
}
-static inline int netpoll_rx_on(struct sk_buff *skb)
-{
- struct netpoll_info *npinfo = rcu_dereference_bh(skb->dev->npinfo);
-
- return npinfo && (!list_empty(&npinfo->rx_np) || npinfo->rx_flags);
-}
-
static inline int netpoll_receive_skb(struct sk_buff *skb)
{
if (!list_empty(&skb->dev->napi_list))
@@ -119,7 +125,7 @@ static inline void netpoll_poll_unlock(void *have)
}
}
-static inline int netpoll_tx_running(struct net_device *dev)
+static inline bool netpoll_tx_running(struct net_device *dev)
{
return irqs_disabled();
}
@@ -127,11 +133,11 @@ static inline int netpoll_tx_running(struct net_device *dev)
#else
static inline bool netpoll_rx(struct sk_buff *skb)
{
- return 0;
+ return false;
}
-static inline int netpoll_rx_on(struct sk_buff *skb)
+static inline bool netpoll_rx_on(struct sk_buff *skb)
{
- return 0;
+ return false;
}
static inline int netpoll_receive_skb(struct sk_buff *skb)
{
@@ -147,9 +153,9 @@ static inline void netpoll_poll_unlock(void *have)
static inline void netpoll_netdev_init(struct net_device *dev)
{
}
-static inline int netpoll_tx_running(struct net_device *dev)
+static inline bool netpoll_tx_running(struct net_device *dev)
{
- return 0;
+ return false;
}
#endif
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