tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#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
21#define INETFRAGS_HASHSZ 64
22
23struct inet_frags_ctl {
24 int high_thresh;
25 int low_thresh;
26 int timeout;
27 int secret_interval;
28};
29
30struct 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;
36 int qsize;
37 atomic_t mem;
38 struct timer_list secret_timer;
39 struct inet_frags_ctl *ctl;
40
41 unsigned int (*hashfn)(struct inet_frag_queue *);
42 void (*constructor)(struct inet_frag_queue *q,
43 void *arg);
44 void (*destructor)(struct inet_frag_queue *);
45 void (*skb_free)(struct sk_buff *);
46 int (*match)(struct inet_frag_queue *q,
47 void *arg);
48 void (*frag_expire)(unsigned long data);
49};
50
51void inet_frags_init(struct inet_frags *);
52void inet_frags_fini(struct inet_frags *);
53
54void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
55void inet_frag_destroy(struct inet_frag_queue *q,
56 struct inet_frags *f, int *work);
57int inet_frag_evictor(struct inet_frags *f);
58struct inet_frag_queue *inet_frag_find(struct inet_frags *f, void *key,
59 unsigned int hash);
60
61static inline void inet_frag_put(struct inet_frag_queue *q, struct inet_frags *f)
62{
63 if (atomic_dec_and_test(&q->refcnt))
64 inet_frag_destroy(q, f, NULL);
65}
66
67#endif