1 files changed, 67 insertions, 0 deletions
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
new file mode 100644
index 00000000000..954def40897
--- /dev/null
+++ b/include/net/inet_frag.h
@@ -0,0 +1,67 @@
+#ifndef __NET_FRAG_H__
+#define __NET_FRAG_H__
+
+struct inet_frag_queue {
+	struct hlist_node	list;
+	struct list_head	lru_list;   /* lru list member */
+	spinlock_t		lock;
+	atomic_t		refcnt;
+	struct timer_list	timer;      /* when will this queue expire? */
+	struct sk_buff		*fragments; /* list of received fragments */
+	ktime_t			stamp;
+	int			len;        /* total length of orig datagram */
+	int			meat;
+	__u8			last_in;    /* first/last segment arrived? */
+
+#define COMPLETE		4
+#define FIRST_IN		2
+#define LAST_IN			1
+};
+
+#define INETFRAGS_HASHSZ		64
+
+struct inet_frags_ctl {
+	int high_thresh;
+	int low_thresh;
+	int timeout;
+	int secret_interval;
+};
+
+struct inet_frags {
+	struct list_head	lru_list;
+	struct hlist_head	hash[INETFRAGS_HASHSZ];
+	rwlock_t		lock;
+	u32			rnd;
+	int			nqueues;
+	int			qsize;
+	atomic_t		mem;
+	struct timer_list	secret_timer;
+	struct inet_frags_ctl	*ctl;
+
+	unsigned int		(*hashfn)(struct inet_frag_queue *);
+	void			(*constructor)(struct inet_frag_queue *q,
+						void *arg);
+	void			(*destructor)(struct inet_frag_queue *);
+	void			(*skb_free)(struct sk_buff *);
+	int			(*match)(struct inet_frag_queue *q,
+						void *arg);
+	void			(*frag_expire)(unsigned long data);
+};
+
+void inet_frags_init(struct inet_frags *);
+void inet_frags_fini(struct inet_frags *);
+
+void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
+void inet_frag_destroy(struct inet_frag_queue *q,
+				struct inet_frags *f, int *work);
+int inet_frag_evictor(struct inet_frags *f);
+struct inet_frag_queue *inet_frag_find(struct inet_frags *f, void *key,
+		unsigned int hash);
+
+static inline void inet_frag_put(struct inet_frag_queue *q, struct inet_frags *f)
+{
+	if (atomic_dec_and_test(&q->refcnt))
+		inet_frag_destroy(q, f, NULL);
+}
+
+#endif