2ad69c55a2
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* NET Generic infrastructure for Network protocols.
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*
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* Authors: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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*
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* From code originally in include/net/tcp.h
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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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#include <linux/module.h>
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#include <linux/random.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <net/request_sock.h>
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int reqsk_queue_alloc(struct request_sock_queue *queue,
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const int nr_table_entries)
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{
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const int lopt_size = sizeof(struct listen_sock) +
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nr_table_entries * sizeof(struct request_sock *);
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struct listen_sock *lopt = kmalloc(lopt_size, GFP_KERNEL);
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if (lopt == NULL)
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return -ENOMEM;
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memset(lopt, 0, lopt_size);
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for (lopt->max_qlen_log = 6;
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(1 << lopt->max_qlen_log) < sysctl_max_syn_backlog;
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lopt->max_qlen_log++);
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get_random_bytes(&lopt->hash_rnd, sizeof(lopt->hash_rnd));
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rwlock_init(&queue->syn_wait_lock);
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queue->rskq_accept_head = queue->rskq_accept_head = NULL;
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write_lock_bh(&queue->syn_wait_lock);
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queue->listen_opt = lopt;
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write_unlock_bh(&queue->syn_wait_lock);
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return 0;
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}
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EXPORT_SYMBOL(reqsk_queue_alloc);
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