7eb95156d9
There are some objects that are common in all the places which are used to keep track of frag queues, they are: * hash table * LRU list * rw lock * rnd number for hash function * the number of queues * the amount of memory occupied by queues * secret timer Move all this stuff into one structure (struct inet_frags) to make it possible use them uniformly in the future. Like with the previous patch this mostly consists of hunks like - write_lock(&ipfrag_lock); + write_lock(&ip4_frags.lock); To address the issue with exporting the number of queues and the amount of memory occupied by queues outside the .c file they are declared in, I introduce a couple of helpers. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
37 lines
833 B
C
37 lines
833 B
C
#ifndef __NET_FRAG_H__
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#define __NET_FRAG_H__
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struct inet_frag_queue {
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struct hlist_node list;
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struct list_head lru_list; /* lru list member */
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spinlock_t lock;
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atomic_t refcnt;
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struct timer_list timer; /* when will this queue expire? */
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struct sk_buff *fragments; /* list of received fragments */
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ktime_t stamp;
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int len; /* total length of orig datagram */
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int meat;
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__u8 last_in; /* first/last segment arrived? */
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#define COMPLETE 4
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#define FIRST_IN 2
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#define LAST_IN 1
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};
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#define INETFRAGS_HASHSZ 64
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struct inet_frags {
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struct list_head lru_list;
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struct hlist_head hash[INETFRAGS_HASHSZ];
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rwlock_t lock;
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u32 rnd;
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int nqueues;
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atomic_t mem;
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struct timer_list secret_timer;
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};
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void inet_frags_init(struct inet_frags *);
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void inet_frags_fini(struct inet_frags *);
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#endif
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