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#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 (*constructor)(struct inet_frag_queue *q,
void *arg);
void (*destructor)(struct inet_frag_queue *);
void (*skb_free)(struct sk_buff *);
int (*equal)(struct inet_frag_queue *q1,
struct inet_frag_queue *q2);
int (*match)(struct inet_frag_queue *q,
void *arg);
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_find(struct inet_frags *f, void *key,
unsigned int hash);
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
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