X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Fnetpoll.h;h=ca5a8733000fa08b65c21b3456b052b9f48dde21;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=a9e4817c416e59f0a1f22fd6145dd9b74a6b48c2;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index a9e4817c4..ca5a87330 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -9,6 +9,7 @@
 
 #include <linux/netdevice.h>
 #include <linux/interrupt.h>
+#include <linux/rcupdate.h>
 #include <linux/list.h>
 
 struct netpoll;
@@ -17,21 +18,76 @@ struct netpoll {
 	struct net_device *dev;
 	char dev_name[16], *name;
 	void (*rx_hook)(struct netpoll *, int, char *, int);
+	void (*drop)(struct sk_buff *skb);
 	u32 local_ip, remote_ip;
 	u16 local_port, remote_port;
 	unsigned char local_mac[6], remote_mac[6];
-	struct list_head rx_list;
+};
+
+struct netpoll_info {
+	spinlock_t poll_lock;
+	int poll_owner;
+	int tries;
+	int rx_flags;
+	spinlock_t rx_lock;
+	struct netpoll *rx_np; /* netpoll that registered an rx_hook */
 };
 
 void netpoll_poll(struct netpoll *np);
-void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb);
 void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
 int netpoll_parse_options(struct netpoll *np, char *opt);
 int netpoll_setup(struct netpoll *np);
 int netpoll_trap(void);
 void netpoll_set_trap(int trap);
 void netpoll_cleanup(struct netpoll *np);
-int netpoll_rx(struct sk_buff *skb);
+int __netpoll_rx(struct sk_buff *skb);
+void netpoll_queue(struct sk_buff *skb);
+
+#ifdef CONFIG_NETPOLL
+static inline int netpoll_rx(struct sk_buff *skb)
+{
+	struct netpoll_info *npinfo = skb->dev->npinfo;
+	unsigned long flags;
+	int ret = 0;
+
+	if (!npinfo || (!npinfo->rx_np && !npinfo->rx_flags))
+		return 0;
+
+	spin_lock_irqsave(&npinfo->rx_lock, flags);
+	/* check rx_flags again with the lock held */
+	if (npinfo->rx_flags && __netpoll_rx(skb))
+		ret = 1;
+	spin_unlock_irqrestore(&npinfo->rx_lock, flags);
 
+	return ret;
+}
+
+static inline void *netpoll_poll_lock(struct net_device *dev)
+{
+	rcu_read_lock(); /* deal with race on ->npinfo */
+	if (dev->npinfo) {
+		spin_lock(&dev->npinfo->poll_lock);
+		dev->npinfo->poll_owner = smp_processor_id();
+		return dev->npinfo;
+	}
+	return NULL;
+}
+
+static inline void netpoll_poll_unlock(void *have)
+{
+	struct netpoll_info *npi = have;
+
+	if (npi) {
+		npi->poll_owner = -1;
+		spin_unlock(&npi->poll_lock);
+	}
+	rcu_read_unlock();
+}
+
+#else
+#define netpoll_rx(a) 0
+#define netpoll_poll_lock(a) NULL
+#define netpoll_poll_unlock(a)
+#endif
 
 #endif