Arnaldo Carvalho de Melo | 0e87506 | 2005-06-18 22:47:59 -0700 | [diff] [blame] | 1 | /* |
| 2 | * NET Generic infrastructure for Network protocols. |
| 3 | * |
| 4 | * Authors: Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
| 5 | * |
| 6 | * From code originally in include/net/tcp.h |
| 7 | * |
| 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. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/random.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/string.h> |
| 18 | |
| 19 | #include <net/request_sock.h> |
| 20 | |
| 21 | int reqsk_queue_alloc(struct request_sock_queue *queue, |
| 22 | const int nr_table_entries) |
| 23 | { |
Arnaldo Carvalho de Melo | 2ad69c5 | 2005-06-18 22:48:55 -0700 | [diff] [blame^] | 24 | const int lopt_size = sizeof(struct listen_sock) + |
Arnaldo Carvalho de Melo | 0e87506 | 2005-06-18 22:47:59 -0700 | [diff] [blame] | 25 | nr_table_entries * sizeof(struct request_sock *); |
Arnaldo Carvalho de Melo | 2ad69c5 | 2005-06-18 22:48:55 -0700 | [diff] [blame^] | 26 | struct listen_sock *lopt = kmalloc(lopt_size, GFP_KERNEL); |
Arnaldo Carvalho de Melo | 0e87506 | 2005-06-18 22:47:59 -0700 | [diff] [blame] | 27 | |
| 28 | if (lopt == NULL) |
| 29 | return -ENOMEM; |
| 30 | |
| 31 | memset(lopt, 0, lopt_size); |
| 32 | |
| 33 | for (lopt->max_qlen_log = 6; |
| 34 | (1 << lopt->max_qlen_log) < sysctl_max_syn_backlog; |
| 35 | lopt->max_qlen_log++); |
| 36 | |
| 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; |
| 40 | |
| 41 | write_lock_bh(&queue->syn_wait_lock); |
| 42 | queue->listen_opt = lopt; |
| 43 | write_unlock_bh(&queue->syn_wait_lock); |
| 44 | |
| 45 | return 0; |
| 46 | } |
| 47 | |
| 48 | EXPORT_SYMBOL(reqsk_queue_alloc); |