[linux.git] / include / net / inet_frag.h

#ifndef __NET_FRAG_H__
#define __NET_FRAG_H__

struct netns_frags {
	int			nqueues;
	atomic_t		mem;
	struct list_head	lru_list;

	/* sysctls */
	int			timeout;
	int			high_thresh;
	int			low_thresh;
};

struct inet_frag_queue {
	struct hlist_node	list;
	struct netns_frags	*net;
	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 */
	struct sk_buff		*fragments_tail;
	ktime_t			stamp;
	int			len;        /* total length of orig datagram */
	int			meat;
	__u8			last_in;    /* first/last segment arrived? */

#define INET_FRAG_COMPLETE	4
#define INET_FRAG_FIRST_IN	2
#define INET_FRAG_LAST_IN	1
};

#define INETFRAGS_HASHSZ		64

struct inet_frags {
	struct hlist_head	hash[INETFRAGS_HASHSZ];
	rwlock_t		lock;
	u32			rnd;
	int			qsize;
	int			secret_interval;
	struct timer_list	secret_timer;

	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 *);
	bool			(*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_frags_init_net(struct netns_frags *nf);
void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f);

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 netns_frags *nf, struct inet_frags *f);
struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
		struct inet_frags *f, void *key, unsigned int hash)
	__releases(&f->lock);

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
Commit	Line	Data
5ab11c98 PE	1	#ifndef __NET_FRAG_H__
	2	#define __NET_FRAG_H__
	3
ac18e750	4	struct netns_frags {
e5a2bb84	5	int nqueues;
6ddc0822	6	atomic_t mem;
3140c25c	7	struct list_head lru_list;
b2fd5321 PE	8
	9	/* sysctls */
	10	int timeout;
e31e0bdc PE	11	int high_thresh;
e31e0bdc PE	12	int low_thresh;
ac18e750 PE	13	};
ac18e750 PE	14
5ab11c98 PE	15	struct inet_frag_queue {
5ab11c98 PE	16	struct hlist_node list;
ac18e750	17	struct netns_frags *net;
5ab11c98 PE	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 */
d6bebca9	23	struct sk_buff *fragments_tail;
5ab11c98 PE	24	ktime_t stamp;
	25	int len; /* total length of orig datagram */
	26	int meat;
	27	__u8 last_in; /* first/last segment arrived? */
	28
bc578a54 JP	29	#define INET_FRAG_COMPLETE 4
	30	#define INET_FRAG_FIRST_IN 2
	31	#define INET_FRAG_LAST_IN 1
5ab11c98 PE	32	};
5ab11c98 PE	33
7eb95156 PE	34	#define INETFRAGS_HASHSZ 64
	35
	36	struct inet_frags {
7eb95156 PE	37	struct hlist_head hash[INETFRAGS_HASHSZ];
	38	rwlock_t lock;
	39	u32 rnd;
1e4b8287	40	int qsize;
3b4bc4a2	41	int secret_interval;
7eb95156	42	struct timer_list secret_timer;
321a3a99 PE	43
321a3a99 PE	44	unsigned int (hashfn)(struct inet_frag_queue );
c6fda282 PE	45	void (constructor)(struct inet_frag_queue q,
c6fda282 PE	46	void *arg);
1e4b8287 PE	47	void (destructor)(struct inet_frag_queue );
1e4b8287 PE	48	void (skb_free)(struct sk_buff );
cbc264ca	49	bool (match)(struct inet_frag_queue q, void *arg);
e521db9d	50	void (*frag_expire)(unsigned long data);
7eb95156 PE	51	};
	52
	53	void inet_frags_init(struct inet_frags *);
	54	void inet_frags_fini(struct inet_frags *);
	55
e5a2bb84	56	void inet_frags_init_net(struct netns_frags *nf);
81566e83	57	void inet_frags_exit_net(struct netns_frags nf, struct inet_frags f);
e5a2bb84	58
277e650d	59	void inet_frag_kill(struct inet_frag_queue q, struct inet_frags f);
1e4b8287 PE	60	void inet_frag_destroy(struct inet_frag_queue *q,
1e4b8287 PE	61	struct inet_frags f, int work);
6ddc0822	62	int inet_frag_evictor(struct netns_frags nf, struct inet_frags f);
ac18e750	63	struct inet_frag_queue inet_frag_find(struct netns_frags nf,
56bca31f HE	64	struct inet_frags f, void key, unsigned int hash)
56bca31f HE	65	__releases(&f->lock);
277e650d	66
762cc408 PE	67	static inline void inet_frag_put(struct inet_frag_queue q, struct inet_frags f)
	68	{
	69	if (atomic_dec_and_test(&q->refcnt))
	70	inet_frag_destroy(q, f, NULL);
	71	}
	72
5ab11c98	73	#endif