Merge with Linux 2.3.38.

1 files changed, 66 insertions, 0 deletions

diff --git a/include/net/inetpeer.h b/include/net/inetpeer.h
new file mode 100644
index 000000000..3b69aed93
--- /dev/null
+++ b/include/net/inetpeer.h
@@ -0,0 +1,66 @@
+/*
+ *		INETPEER - A storage for permanent information about peers
+ *
+ *  Version:	$Id: inetpeer.h,v 1.1 2000/01/06 00:41:51 davem Exp $
+ *
+ *  Authors:	Andrey V. Savochkin <saw@msu.ru>
+ */
+
+#ifndef _NET_INETPEER_H
+#define _NET_INETPEER_H
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <asm/atomic.h>
+
+struct inet_peer
+{
+	struct inet_peer	*avl_left, *avl_right;
+	struct inet_peer	*unused_next, **unused_prevp;
+	atomic_t		refcnt;
+	unsigned long		dtime;		/* the time of last use of not
+						 * referenced entries */
+	__u32			v4daddr;	/* peer's address */
+	__u16			avl_height;
+	__u16			ip_id_count;	/* IP ID for the next packet */
+	__u32			tcp_ts;
+	unsigned long		tcp_ts_stamp;
+};
+
+void			inet_initpeers(void) __init;
+
+/* can be called with or without local BH being disabled */
+struct inet_peer	*inet_getpeer(__u32 daddr, int create);
+
+extern spinlock_t inet_peer_unused_lock;
+extern struct inet_peer *inet_peer_unused_head;
+extern struct inet_peer **inet_peer_unused_tailp;
+/* can be called from BH context or outside */
+extern inline void	inet_putpeer(struct inet_peer *p)
+{
+	spin_lock_bh(&inet_peer_unused_lock);
+	if (atomic_dec_and_test(&p->refcnt)) {
+		p->unused_prevp = inet_peer_unused_tailp;
+		p->unused_next = NULL;
+		*inet_peer_unused_tailp = p;
+		inet_peer_unused_tailp = &p->unused_next;
+		p->dtime = jiffies;
+	}
+	spin_unlock_bh(&inet_peer_unused_lock);
+}
+
+extern spinlock_t inet_peer_idlock;
+/* can be called with or without local BH being disabled */
+extern inline __u16	inet_getid(struct inet_peer *p)
+{
+	__u16 id;
+
+	spin_lock_bh(&inet_peer_idlock);
+	id = p->ip_id_count++;
+	spin_unlock_bh(&inet_peer_idlock);
+	return id;
+}
+
+#endif /* _NET_INETPEER_H */