net/ipv4/inet_fragment.c

   1 /*
   2  * inet fragments management
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  *              Authors:        Pavel Emelyanov <xemul@openvz.org>
  10  *                              Started as consolidation of ipv4/ip_fragment.c,
  11  *                              ipv6/reassembly. and ipv6 nf conntrack reassembly
  12  */
  13
  14 #include <linux/list.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/module.h>
  17 #include <linux/timer.h>
  18 #include <linux/mm.h>
  19
  20 #include <net/inet_frag.h>
  21
  22 void inet_frags_init(struct inet_frags *f)
  23 {
  24         int i;
  25
  26         for (i = 0; i < INETFRAGS_HASHSZ; i++)
  27                 INIT_HLIST_HEAD(&f->hash[i]);
  28
  29         INIT_LIST_HEAD(&f->lru_list);
  30         rwlock_init(&f->lock);
  31
  32         f->rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
  33                                    (jiffies ^ (jiffies >> 6)));
  34
  35         f->nqueues = 0;
  36         atomic_set(&f->mem, 0);
  37
  38 }
  39 EXPORT_SYMBOL(inet_frags_init);
  40
  41 void inet_frags_fini(struct inet_frags *f)
  42 {
  43 }
  44 EXPORT_SYMBOL(inet_frags_fini);