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-rw-r--r--include/net/inet_frag.h67
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