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v3.15
  1/*
  2 * net/tipc/core.c: TIPC module code
  3 *
  4 * Copyright (c) 2003-2006, 2013, Ericsson AB
  5 * Copyright (c) 2005-2006, 2010-2013, Wind River Systems
  6 * All rights reserved.
  7 *
  8 * Redistribution and use in source and binary forms, with or without
  9 * modification, are permitted provided that the following conditions are met:
 10 *
 11 * 1. Redistributions of source code must retain the above copyright
 12 *    notice, this list of conditions and the following disclaimer.
 13 * 2. Redistributions in binary form must reproduce the above copyright
 14 *    notice, this list of conditions and the following disclaimer in the
 15 *    documentation and/or other materials provided with the distribution.
 16 * 3. Neither the names of the copyright holders nor the names of its
 17 *    contributors may be used to endorse or promote products derived from
 18 *    this software without specific prior written permission.
 19 *
 20 * Alternatively, this software may be distributed under the terms of the
 21 * GNU General Public License ("GPL") version 2 as published by the Free
 22 * Software Foundation.
 23 *
 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 34 * POSSIBILITY OF SUCH DAMAGE.
 35 */
 36
 
 
 37#include "core.h"
 38#include "ref.h"
 39#include "name_table.h"
 40#include "subscr.h"
 41#include "config.h"
 42#include "port.h"
 
 
 43
 44#include <linux/module.h>
 45
 46/* global variables used by multiple sub-systems within TIPC */
 47int tipc_random __read_mostly;
 48
 49/* configurable TIPC parameters */
 50u32 tipc_own_addr __read_mostly;
 51int tipc_max_ports __read_mostly;
 52int tipc_net_id __read_mostly;
 53int sysctl_tipc_rmem[3] __read_mostly;	/* min/default/max */
 54
 55/**
 56 * tipc_buf_acquire - creates a TIPC message buffer
 57 * @size: message size (including TIPC header)
 58 *
 59 * Returns a new buffer with data pointers set to the specified size.
 60 *
 61 * NOTE: Headroom is reserved to allow prepending of a data link header.
 62 *       There may also be unrequested tailroom present at the buffer's end.
 63 */
 64struct sk_buff *tipc_buf_acquire(u32 size)
 65{
 66	struct sk_buff *skb;
 67	unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
 
 
 
 
 
 
 
 
 
 
 
 68
 69	skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
 70	if (skb) {
 71		skb_reserve(skb, BUF_HEADROOM);
 72		skb_put(skb, size);
 73		skb->next = NULL;
 74	}
 75	return skb;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 76}
 77
 78/**
 79 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
 80 */
 81static void tipc_core_stop(void)
 82{
 83	tipc_handler_stop();
 84	tipc_net_stop();
 85	tipc_bearer_cleanup();
 86	tipc_netlink_stop();
 87	tipc_subscr_stop();
 88	tipc_nametbl_stop();
 89	tipc_ref_table_stop();
 90	tipc_socket_stop();
 91	tipc_unregister_sysctl();
 92}
 93
 94/**
 95 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
 96 */
 97static int tipc_core_start(void)
 
 
 
 
 98{
 99	int err;
100
101	get_random_bytes(&tipc_random, sizeof(tipc_random));
102
103	err = tipc_handler_start();
104	if (err)
105		goto out_handler;
106
107	err = tipc_ref_table_init(tipc_max_ports, tipc_random);
108	if (err)
109		goto out_reftbl;
110
111	err = tipc_nametbl_init();
112	if (err)
113		goto out_nametbl;
114
115	err = tipc_netlink_start();
116	if (err)
117		goto out_netlink;
118
 
 
 
 
119	err = tipc_socket_init();
120	if (err)
121		goto out_socket;
122
123	err = tipc_register_sysctl();
124	if (err)
125		goto out_sysctl;
126
127	err = tipc_subscr_start();
128	if (err)
129		goto out_subscr;
130
131	err = tipc_bearer_setup();
132	if (err)
133		goto out_bearer;
134
 
135	return 0;
136out_bearer:
137	tipc_subscr_stop();
138out_subscr:
139	tipc_unregister_sysctl();
140out_sysctl:
141	tipc_socket_stop();
142out_socket:
 
 
143	tipc_netlink_stop();
144out_netlink:
145	tipc_nametbl_stop();
146out_nametbl:
147	tipc_ref_table_stop();
148out_reftbl:
149	tipc_handler_stop();
150out_handler:
151	return err;
152}
153
154static int __init tipc_init(void)
155{
156	int res;
157
158	pr_info("Activated (version " TIPC_MOD_VER ")\n");
159
160	tipc_own_addr = 0;
161	tipc_max_ports = CONFIG_TIPC_PORTS;
162	tipc_net_id = 4711;
163
164	sysctl_tipc_rmem[0] = CONN_OVERLOAD_LIMIT >> 4 << TIPC_LOW_IMPORTANCE;
165	sysctl_tipc_rmem[1] = CONN_OVERLOAD_LIMIT >> 4 <<
166			      TIPC_CRITICAL_IMPORTANCE;
167	sysctl_tipc_rmem[2] = CONN_OVERLOAD_LIMIT;
168
169	res = tipc_core_start();
170	if (res)
171		pr_err("Unable to start in single node mode\n");
172	else
173		pr_info("Started in single node mode\n");
174	return res;
175}
176
177static void __exit tipc_exit(void)
178{
179	tipc_core_stop();
 
 
 
 
 
 
180	pr_info("Deactivated\n");
181}
182
183module_init(tipc_init);
184module_exit(tipc_exit);
185
186MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
187MODULE_LICENSE("Dual BSD/GPL");
188MODULE_VERSION(TIPC_MOD_VER);
v4.17
  1/*
  2 * net/tipc/core.c: TIPC module code
  3 *
  4 * Copyright (c) 2003-2006, 2013, Ericsson AB
  5 * Copyright (c) 2005-2006, 2010-2013, Wind River Systems
  6 * All rights reserved.
  7 *
  8 * Redistribution and use in source and binary forms, with or without
  9 * modification, are permitted provided that the following conditions are met:
 10 *
 11 * 1. Redistributions of source code must retain the above copyright
 12 *    notice, this list of conditions and the following disclaimer.
 13 * 2. Redistributions in binary form must reproduce the above copyright
 14 *    notice, this list of conditions and the following disclaimer in the
 15 *    documentation and/or other materials provided with the distribution.
 16 * 3. Neither the names of the copyright holders nor the names of its
 17 *    contributors may be used to endorse or promote products derived from
 18 *    this software without specific prior written permission.
 19 *
 20 * Alternatively, this software may be distributed under the terms of the
 21 * GNU General Public License ("GPL") version 2 as published by the Free
 22 * Software Foundation.
 23 *
 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 34 * POSSIBILITY OF SUCH DAMAGE.
 35 */
 36
 37#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 38
 39#include "core.h"
 
 40#include "name_table.h"
 41#include "subscr.h"
 42#include "bearer.h"
 43#include "net.h"
 44#include "socket.h"
 45#include "bcast.h"
 46
 47#include <linux/module.h>
 48
 
 
 
 49/* configurable TIPC parameters */
 50unsigned int tipc_net_id __read_mostly;
 
 
 51int sysctl_tipc_rmem[3] __read_mostly;	/* min/default/max */
 52
 53static int __net_init tipc_init_net(struct net *net)
 
 
 
 
 
 
 
 
 
 54{
 55	struct tipc_net *tn = net_generic(net, tipc_net_id);
 56	int err;
 57
 58	tn->net_id = 4711;
 59	tn->node_addr = 0;
 60	tn->trial_addr = 0;
 61	tn->addr_trial_end = 0;
 62	memset(tn->node_id, 0, sizeof(tn->node_id));
 63	memset(tn->node_id_string, 0, sizeof(tn->node_id_string));
 64	tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
 65	get_random_bytes(&tn->random, sizeof(int));
 66	INIT_LIST_HEAD(&tn->node_list);
 67	spin_lock_init(&tn->node_list_lock);
 68
 69	err = tipc_sk_rht_init(net);
 70	if (err)
 71		goto out_sk_rht;
 72
 73	err = tipc_nametbl_init(net);
 74	if (err)
 75		goto out_nametbl;
 76
 77	INIT_LIST_HEAD(&tn->dist_queue);
 78	err = tipc_topsrv_start(net);
 79	if (err)
 80		goto out_subscr;
 81
 82	err = tipc_bcast_init(net);
 83	if (err)
 84		goto out_bclink;
 85
 86	return 0;
 87
 88out_bclink:
 89	tipc_bcast_stop(net);
 90out_subscr:
 91	tipc_nametbl_stop(net);
 92out_nametbl:
 93	tipc_sk_rht_destroy(net);
 94out_sk_rht:
 95	return err;
 96}
 97
 98static void __net_exit tipc_exit_net(struct net *net)
 
 
 
 99{
100	tipc_topsrv_stop(net);
101	tipc_net_stop(net);
102	tipc_bcast_stop(net);
103	tipc_nametbl_stop(net);
104	tipc_sk_rht_destroy(net);
 
 
 
 
105}
106
107static struct pernet_operations tipc_net_ops = {
108	.init = tipc_init_net,
109	.exit = tipc_exit_net,
110	.id   = &tipc_net_id,
111	.size = sizeof(struct tipc_net),
112};
113
114static int __init tipc_init(void)
115{
116	int err;
117
118	pr_info("Activated (version " TIPC_MOD_VER ")\n");
 
 
 
 
 
 
 
 
119
120	sysctl_tipc_rmem[0] = RCVBUF_MIN;
121	sysctl_tipc_rmem[1] = RCVBUF_DEF;
122	sysctl_tipc_rmem[2] = RCVBUF_MAX;
123
124	err = tipc_netlink_start();
125	if (err)
126		goto out_netlink;
127
128	err = tipc_netlink_compat_start();
129	if (err)
130		goto out_netlink_compat;
131
132	err = tipc_socket_init();
133	if (err)
134		goto out_socket;
135
136	err = tipc_register_sysctl();
137	if (err)
138		goto out_sysctl;
139
140	err = register_pernet_subsys(&tipc_net_ops);
141	if (err)
142		goto out_pernet;
143
144	err = tipc_bearer_setup();
145	if (err)
146		goto out_bearer;
147
148	pr_info("Started in single node mode\n");
149	return 0;
150out_bearer:
151	unregister_pernet_subsys(&tipc_net_ops);
152out_pernet:
153	tipc_unregister_sysctl();
154out_sysctl:
155	tipc_socket_stop();
156out_socket:
157	tipc_netlink_compat_stop();
158out_netlink_compat:
159	tipc_netlink_stop();
160out_netlink:
161	pr_err("Unable to start in single node mode\n");
 
 
 
 
 
162	return err;
163}
164
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
165static void __exit tipc_exit(void)
166{
167	tipc_bearer_cleanup();
168	unregister_pernet_subsys(&tipc_net_ops);
169	tipc_netlink_stop();
170	tipc_netlink_compat_stop();
171	tipc_socket_stop();
172	tipc_unregister_sysctl();
173
174	pr_info("Deactivated\n");
175}
176
177module_init(tipc_init);
178module_exit(tipc_exit);
179
180MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
181MODULE_LICENSE("Dual BSD/GPL");
182MODULE_VERSION(TIPC_MOD_VER);