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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef __NET_FRAG_H__
2#define __NET_FRAG_H__
3
4struct netns_frags {
5 int nqueues;
6 atomic_t mem;
7 struct list_head lru_list;
8
9 /* sysctls */
10 int timeout;
11 int high_thresh;
12 int low_thresh;
13};
14
15struct inet_frag_queue {
16 struct hlist_node list;
17 struct netns_frags *net;
18 struct list_head lru_list; /* lru list member */
19 spinlock_t lock;
20 atomic_t refcnt;
21 struct timer_list timer; /* when will this queue expire? */
22 struct sk_buff *fragments; /* list of received fragments */
23 ktime_t stamp;
24 int len; /* total length of orig datagram */
25 int meat;
26 __u8 last_in; /* first/last segment arrived? */
27
28#define INET_FRAG_COMPLETE 4
29#define INET_FRAG_FIRST_IN 2
30#define INET_FRAG_LAST_IN 1
31};
32
33#define INETFRAGS_HASHSZ 64
34
35struct inet_frags {
36 struct hlist_head hash[INETFRAGS_HASHSZ];
37 rwlock_t lock;
38 u32 rnd;
39 int qsize;
40 int secret_interval;
41 struct timer_list secret_timer;
42
43 unsigned int (*hashfn)(struct inet_frag_queue *);
44 void (*constructor)(struct inet_frag_queue *q,
45 void *arg);
46 void (*destructor)(struct inet_frag_queue *);
47 void (*skb_free)(struct sk_buff *);
48 int (*match)(struct inet_frag_queue *q,
49 void *arg);
50 void (*frag_expire)(unsigned long data);
51};
52
53void inet_frags_init(struct inet_frags *);
54void inet_frags_fini(struct inet_frags *);
55
56void inet_frags_init_net(struct netns_frags *nf);
57void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f);
58
59void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
60void inet_frag_destroy(struct inet_frag_queue *q,
61 struct inet_frags *f, int *work);
62int inet_frag_evictor(struct netns_frags *nf, struct inet_frags *f);
63struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
64 struct inet_frags *f, void *key, unsigned int hash);
65
66static inline void inet_frag_put(struct inet_frag_queue *q, struct inet_frags *f)
67{
68 if (atomic_dec_and_test(&q->refcnt))
69 inet_frag_destroy(q, f, NULL);
70}
71
72#endif