#include <linux/netdevice.h>
#include <linux/interrupt.h>
+#include <linux/rcupdate.h>
#include <linux/list.h>
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);
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