2 * NET Generic infrastructure for Network protocols.
4 * Authors: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
6 * From code originally in include/net/tcp.h
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
14 #include <linux/module.h>
15 #include <linux/random.h>
16 #include <linux/slab.h>
17 #include <linux/string.h>
19 #include <net/request_sock.h>
21 int reqsk_queue_alloc(struct request_sock_queue *queue,
22 const int nr_table_entries)
24 const int lopt_size = sizeof(struct tcp_listen_opt) +
25 nr_table_entries * sizeof(struct request_sock *);
26 struct tcp_listen_opt *lopt = kmalloc(lopt_size, GFP_KERNEL);
31 memset(lopt, 0, lopt_size);
33 for (lopt->max_qlen_log = 6;
34 (1 << lopt->max_qlen_log) < sysctl_max_syn_backlog;
35 lopt->max_qlen_log++);
37 get_random_bytes(&lopt->hash_rnd, sizeof(lopt->hash_rnd));
38 rwlock_init(&queue->syn_wait_lock);
39 queue->rskq_accept_head = queue->rskq_accept_head = NULL;
41 write_lock_bh(&queue->syn_wait_lock);
42 queue->listen_opt = lopt;
43 write_unlock_bh(&queue->syn_wait_lock);
48 EXPORT_SYMBOL(reqsk_queue_alloc);