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Pavel Emelyanov5ab11c92007-10-15 02:24:19 -07001#ifndef __NET_FRAG_H__
2#define __NET_FRAG_H__
3
4struct inet_frag_queue {
5 struct hlist_node list;
6 struct list_head lru_list; /* lru list member */
7 spinlock_t lock;
8 atomic_t refcnt;
9 struct timer_list timer; /* when will this queue expire? */
10 struct sk_buff *fragments; /* list of received fragments */
11 ktime_t stamp;
12 int len; /* total length of orig datagram */
13 int meat;
14 __u8 last_in; /* first/last segment arrived? */
15
16#define COMPLETE 4
17#define FIRST_IN 2
18#define LAST_IN 1
19};
20
Pavel Emelyanov7eb95152007-10-15 02:31:52 -070021#define INETFRAGS_HASHSZ 64
22
Pavel Emelyanov04128f22007-10-15 02:33:45 -070023struct inet_frags_ctl {
24 int high_thresh;
25 int low_thresh;
26 int timeout;
27 int secret_interval;
28};
29
Pavel Emelyanov7eb95152007-10-15 02:31:52 -070030struct inet_frags {
31 struct list_head lru_list;
32 struct hlist_head hash[INETFRAGS_HASHSZ];
33 rwlock_t lock;
34 u32 rnd;
35 int nqueues;
Pavel Emelyanov1e4b8282007-10-15 02:39:14 -070036 int qsize;
Pavel Emelyanov7eb95152007-10-15 02:31:52 -070037 atomic_t mem;
38 struct timer_list secret_timer;
Pavel Emelyanov04128f22007-10-15 02:33:45 -070039 struct inet_frags_ctl *ctl;
Pavel Emelyanov321a3a92007-10-15 02:38:08 -070040
41 unsigned int (*hashfn)(struct inet_frag_queue *);
Pavel Emelyanov1e4b8282007-10-15 02:39:14 -070042 void (*destructor)(struct inet_frag_queue *);
43 void (*skb_free)(struct sk_buff *);
Pavel Emelyanov7eb95152007-10-15 02:31:52 -070044};
45
46void inet_frags_init(struct inet_frags *);
47void inet_frags_fini(struct inet_frags *);
48
Pavel Emelyanov277e6502007-10-15 02:37:18 -070049void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
Pavel Emelyanov1e4b8282007-10-15 02:39:14 -070050void inet_frag_destroy(struct inet_frag_queue *q,
51 struct inet_frags *f, int *work);
Pavel Emelyanov8e7999c2007-10-15 02:40:06 -070052int inet_frag_evictor(struct inet_frags *f);
Pavel Emelyanov277e6502007-10-15 02:37:18 -070053
Pavel Emelyanov5ab11c92007-10-15 02:24:19 -070054#endif