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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>
45 lines
1 KiB
C
45 lines
1 KiB
C
/*
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* inet fragments management
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Pavel Emelyanov <xemul@openvz.org>
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* Started as consolidation of ipv4/ip_fragment.c,
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* ipv6/reassembly. and ipv6 nf conntrack reassembly
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*/
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/module.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <net/inet_frag.h>
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void inet_frags_init(struct inet_frags *f)
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{
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int i;
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for (i = 0; i < INETFRAGS_HASHSZ; i++)
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INIT_HLIST_HEAD(&f->hash[i]);
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INIT_LIST_HEAD(&f->lru_list);
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rwlock_init(&f->lock);
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f->rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
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(jiffies ^ (jiffies >> 6)));
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f->nqueues = 0;
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atomic_set(&f->mem, 0);
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}
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EXPORT_SYMBOL(inet_frags_init);
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void inet_frags_fini(struct inet_frags *f)
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{
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}
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EXPORT_SYMBOL(inet_frags_fini);
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