| #ifndef __NET_FRAG_H__ |
| #define __NET_FRAG_H__ |
| |
| struct netns_frags { |
| int nqueues; |
| atomic_t mem; |
| |
| /* 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 */ |
| 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 secret_interval; |
| }; |
| |
| struct inet_frags { |
| struct list_head lru_list; |
| struct hlist_head hash[INETFRAGS_HASHSZ]; |
| rwlock_t lock; |
| u32 rnd; |
| int qsize; |
| 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 (*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_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); |
| |
| 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 |