61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
#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 *);
|
|
};
|
|
|
|
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);
|
|
|
|
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
|