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0e87506f ACM |
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 | { | |
2ad69c55 | 24 | const int lopt_size = sizeof(struct listen_sock) + |
0e87506f | 25 | nr_table_entries * sizeof(struct request_sock *); |
2ad69c55 | 26 | struct listen_sock *lopt = kmalloc(lopt_size, GFP_KERNEL); |
0e87506f ACM |
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); |