Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/core.c: TIPC module code | |
3 | * | |
c61dd61d | 4 | * Copyright (c) 2003-2006, 2013, Ericsson AB |
13a2e898 | 5 | * Copyright (c) 2005-2006, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
b97bf3fd | 37 | #include "core.h" |
b97bf3fd PL |
38 | #include "name_table.h" |
39 | #include "subscr.h" | |
40 | #include "config.h" | |
2e84c60b | 41 | #include "socket.h" |
b97bf3fd | 42 | |
2cf8aa19 | 43 | #include <linux/module.h> |
b97bf3fd | 44 | |
b97bf3fd | 45 | /* global variables used by multiple sub-systems within TIPC */ |
61cdd4d8 | 46 | int tipc_random __read_mostly; |
b97bf3fd | 47 | |
b97bf3fd | 48 | /* configurable TIPC parameters */ |
61cdd4d8 YX |
49 | u32 tipc_own_addr __read_mostly; |
50 | int tipc_max_ports __read_mostly; | |
61cdd4d8 | 51 | int tipc_net_id __read_mostly; |
cc79dd1b | 52 | int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */ |
b97bf3fd | 53 | |
3032cca4 | 54 | /** |
31e3c3f6 | 55 | * tipc_buf_acquire - creates a TIPC message buffer |
3032cca4 AS |
56 | * @size: message size (including TIPC header) |
57 | * | |
58 | * Returns a new buffer with data pointers set to the specified size. | |
59 | * | |
60 | * NOTE: Headroom is reserved to allow prepending of a data link header. | |
61 | * There may also be unrequested tailroom present at the buffer's end. | |
62 | */ | |
31e3c3f6 | 63 | struct sk_buff *tipc_buf_acquire(u32 size) |
3032cca4 AS |
64 | { |
65 | struct sk_buff *skb; | |
66 | unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; | |
67 | ||
68 | skb = alloc_skb_fclone(buf_size, GFP_ATOMIC); | |
69 | if (skb) { | |
70 | skb_reserve(skb, BUF_HEADROOM); | |
71 | skb_put(skb, size); | |
72 | skb->next = NULL; | |
73 | } | |
74 | return skb; | |
75 | } | |
76 | ||
b97bf3fd | 77 | /** |
4323add6 | 78 | * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode |
b97bf3fd | 79 | */ |
31e3c3f6 | 80 | static void tipc_core_stop(void) |
b97bf3fd | 81 | { |
970122fd YX |
82 | tipc_net_stop(); |
83 | tipc_bearer_cleanup(); | |
4323add6 | 84 | tipc_netlink_stop(); |
4323add6 | 85 | tipc_subscr_stop(); |
4323add6 | 86 | tipc_nametbl_stop(); |
808d90f9 | 87 | tipc_sk_ref_table_stop(); |
4323add6 | 88 | tipc_socket_stop(); |
cc79dd1b | 89 | tipc_unregister_sysctl(); |
b97bf3fd PL |
90 | } |
91 | ||
92 | /** | |
4323add6 | 93 | * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode |
b97bf3fd | 94 | */ |
31e3c3f6 | 95 | static int tipc_core_start(void) |
b97bf3fd | 96 | { |
9fe7ed47 | 97 | int err; |
b97bf3fd | 98 | |
b97bf3fd | 99 | get_random_bytes(&tipc_random, sizeof(tipc_random)); |
b97bf3fd | 100 | |
808d90f9 | 101 | err = tipc_sk_ref_table_init(tipc_max_ports, tipc_random); |
9fe7ed47 YX |
102 | if (err) |
103 | goto out_reftbl; | |
104 | ||
105 | err = tipc_nametbl_init(); | |
106 | if (err) | |
107 | goto out_nametbl; | |
108 | ||
109 | err = tipc_netlink_start(); | |
110 | if (err) | |
111 | goto out_netlink; | |
112 | ||
113 | err = tipc_socket_init(); | |
114 | if (err) | |
115 | goto out_socket; | |
116 | ||
117 | err = tipc_register_sysctl(); | |
118 | if (err) | |
119 | goto out_sysctl; | |
120 | ||
121 | err = tipc_subscr_start(); | |
122 | if (err) | |
123 | goto out_subscr; | |
124 | ||
970122fd YX |
125 | err = tipc_bearer_setup(); |
126 | if (err) | |
127 | goto out_bearer; | |
128 | ||
9fe7ed47 | 129 | return 0; |
970122fd | 130 | out_bearer: |
9fe7ed47 YX |
131 | tipc_subscr_stop(); |
132 | out_subscr: | |
133 | tipc_unregister_sysctl(); | |
134 | out_sysctl: | |
135 | tipc_socket_stop(); | |
136 | out_socket: | |
137 | tipc_netlink_stop(); | |
138 | out_netlink: | |
139 | tipc_nametbl_stop(); | |
140 | out_nametbl: | |
808d90f9 | 141 | tipc_sk_ref_table_stop(); |
9fe7ed47 | 142 | out_reftbl: |
9fe7ed47 | 143 | return err; |
b97bf3fd PL |
144 | } |
145 | ||
b97bf3fd PL |
146 | static int __init tipc_init(void) |
147 | { | |
148 | int res; | |
149 | ||
2cf8aa19 | 150 | pr_info("Activated (version " TIPC_MOD_VER ")\n"); |
b97bf3fd PL |
151 | |
152 | tipc_own_addr = 0; | |
ee983ac7 | 153 | tipc_max_ports = CONFIG_TIPC_PORTS; |
b97bf3fd PL |
154 | tipc_net_id = 4711; |
155 | ||
6163a194 JPM |
156 | sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 << |
157 | TIPC_LOW_IMPORTANCE; | |
158 | sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 << | |
cc79dd1b | 159 | TIPC_CRITICAL_IMPORTANCE; |
6163a194 | 160 | sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT; |
cc79dd1b | 161 | |
2db9983a AS |
162 | res = tipc_core_start(); |
163 | if (res) | |
2cf8aa19 | 164 | pr_err("Unable to start in single node mode\n"); |
c4307285 | 165 | else |
2cf8aa19 | 166 | pr_info("Started in single node mode\n"); |
c4307285 | 167 | return res; |
b97bf3fd PL |
168 | } |
169 | ||
170 | static void __exit tipc_exit(void) | |
171 | { | |
4323add6 | 172 | tipc_core_stop(); |
2cf8aa19 | 173 | pr_info("Deactivated\n"); |
b97bf3fd PL |
174 | } |
175 | ||
176 | module_init(tipc_init); | |
177 | module_exit(tipc_exit); | |
178 | ||
179 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); | |
180 | MODULE_LICENSE("Dual BSD/GPL"); | |
a592ea63 | 181 | MODULE_VERSION(TIPC_MOD_VER); |