blob: 412b8582a6160dc256387a3f948b35f892fd6228 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
#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 (*destructor)(struct inet_frag_queue *);
void (*skb_free)(struct sk_buff *);
int (*equal)(struct inet_frag_queue *q1,
struct inet_frag_queue *q2);
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_intern(struct inet_frag_queue *q,
struct inet_frags *f, unsigned int hash);
struct inet_frag_queue *inet_frag_alloc(struct inet_frags *f);
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
|
