net/tipc/core.c

   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 #include "node.h"
  47
  48 #include <linux/module.h>
  49
  50 /* configurable TIPC parameters */
  51 unsigned int tipc_net_id __read_mostly;
  52 int sysctl_tipc_rmem[3] __read_mostly;  /* min/default/max */
  53
  54 static int __net_init tipc_init_net(struct net *net)
  55 {
  56         struct tipc_net *tn = net_generic(net, tipc_net_id);
  57         int err;
  58
  59         tn->net_id = 4711;
  60         tn->node_addr = 0;
  61         tn->trial_addr = 0;
  62         tn->addr_trial_end = 0;
  63         tn->capabilities = TIPC_NODE_CAPABILITIES;
  64         memset(tn->node_id, 0, sizeof(tn->node_id));
  65         memset(tn->node_id_string, 0, sizeof(tn->node_id_string));
  66         tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
  67         get_random_bytes(&tn->random, sizeof(int));
  68         INIT_LIST_HEAD(&tn->node_list);
  69         spin_lock_init(&tn->node_list_lock);
  70
  71         err = tipc_sk_rht_init(net);
  72         if (err)
  73                 goto out_sk_rht;
  74
  75         err = tipc_nametbl_init(net);
  76         if (err)
  77                 goto out_nametbl;
  78
  79         INIT_LIST_HEAD(&tn->dist_queue);
  80
  81         err = tipc_bcast_init(net);
  82         if (err)
  83                 goto out_bclink;
  84
  85         return 0;
  86
  87 out_bclink:
  88         tipc_nametbl_stop(net);
  89 out_nametbl:
  90         tipc_sk_rht_destroy(net);
  91 out_sk_rht:
  92         return err;
  93 }
  94
  95 static void __net_exit tipc_exit_net(struct net *net)
  96 {
  97         tipc_net_stop(net);
  98         tipc_bcast_stop(net);
  99         tipc_nametbl_stop(net);
 100         tipc_sk_rht_destroy(net);
 101 }
 102
 103 static struct pernet_operations tipc_net_ops = {
 104         .init = tipc_init_net,
 105         .exit = tipc_exit_net,
 106         .id   = &tipc_net_id,
 107         .size = sizeof(struct tipc_net),
 108 };
 109
 110 static struct pernet_operations tipc_topsrv_net_ops = {
 111         .init = tipc_topsrv_init_net,
 112         .exit = tipc_topsrv_exit_net,
 113 };
 114
 115 static int __init tipc_init(void)
 116 {
 117         int err;
 118
 119         pr_info("Activated (version " TIPC_MOD_VER ")\n");
 120
 121         sysctl_tipc_rmem[0] = RCVBUF_MIN;
 122         sysctl_tipc_rmem[1] = RCVBUF_DEF;
 123         sysctl_tipc_rmem[2] = RCVBUF_MAX;
 124
 125         err = tipc_netlink_start();
 126         if (err)
 127                 goto out_netlink;
 128
 129         err = tipc_netlink_compat_start();
 130         if (err)
 131                 goto out_netlink_compat;
 132
 133         err = tipc_register_sysctl();
 134         if (err)
 135                 goto out_sysctl;
 136
 137         err = register_pernet_device(&tipc_net_ops);
 138         if (err)
 139                 goto out_pernet;
 140
 141         err = tipc_socket_init();
 142         if (err)
 143                 goto out_socket;
 144
 145         err = register_pernet_device(&tipc_topsrv_net_ops);
 146         if (err)
 147                 goto out_pernet_topsrv;
 148
 149         err = tipc_bearer_setup();
 150         if (err)
 151                 goto out_bearer;
 152
 153         pr_info("Started in single node mode\n");
 154         return 0;
 155 out_bearer:
 156         unregister_pernet_device(&tipc_topsrv_net_ops);
 157 out_pernet_topsrv:
 158         tipc_socket_stop();
 159 out_socket:
 160         unregister_pernet_device(&tipc_net_ops);
 161 out_pernet:
 162         tipc_unregister_sysctl();
 163 out_sysctl:
 164         tipc_netlink_compat_stop();
 165 out_netlink_compat:
 166         tipc_netlink_stop();
 167 out_netlink:
 168         pr_err("Unable to start in single node mode\n");
 169         return err;
 170 }
 171
 172 static void __exit tipc_exit(void)
 173 {
 174         tipc_bearer_cleanup();
 175         unregister_pernet_device(&tipc_topsrv_net_ops);
 176         tipc_socket_stop();
 177         unregister_pernet_device(&tipc_net_ops);
 178         tipc_netlink_stop();
 179         tipc_netlink_compat_stop();
 180         tipc_unregister_sysctl();
 181
 182         pr_info("Deactivated\n");
 183 }
 184
 185 module_init(tipc_init);
 186 module_exit(tipc_exit);
 187
 188 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
 189 MODULE_LICENSE("Dual BSD/GPL");
 190 MODULE_VERSION(TIPC_MOD_VER);