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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 | 38 | #include "ref.h" |
b97bf3fd PL |
39 | #include "name_table.h" |
40 | #include "subscr.h" | |
41 | #include "config.h" | |
2e84c60b | 42 | #include "socket.h" |
b97bf3fd | 43 | |
2cf8aa19 | 44 | #include <linux/module.h> |
b97bf3fd | 45 | |
b97bf3fd | 46 | /* global variables used by multiple sub-systems within TIPC */ |
61cdd4d8 | 47 | int tipc_random __read_mostly; |
b97bf3fd | 48 | |
b97bf3fd | 49 | /* configurable TIPC parameters */ |
61cdd4d8 YX |
50 | u32 tipc_own_addr __read_mostly; |
51 | int tipc_max_ports __read_mostly; | |
61cdd4d8 | 52 | int tipc_net_id __read_mostly; |
cc79dd1b | 53 | int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */ |
b97bf3fd | 54 | |
3032cca4 | 55 | /** |
31e3c3f6 | 56 | * tipc_buf_acquire - creates a TIPC message buffer |
3032cca4 AS |
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 | */ | |
31e3c3f6 | 64 | struct sk_buff *tipc_buf_acquire(u32 size) |
3032cca4 AS |
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 | ||
b97bf3fd | 78 | /** |
4323add6 | 79 | * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode |
b97bf3fd | 80 | */ |
31e3c3f6 | 81 | static void tipc_core_stop(void) |
b97bf3fd | 82 | { |
970122fd YX |
83 | tipc_net_stop(); |
84 | tipc_bearer_cleanup(); | |
4323add6 | 85 | tipc_netlink_stop(); |
4323add6 | 86 | tipc_subscr_stop(); |
4323add6 PL |
87 | tipc_nametbl_stop(); |
88 | tipc_ref_table_stop(); | |
89 | tipc_socket_stop(); | |
cc79dd1b | 90 | tipc_unregister_sysctl(); |
b97bf3fd PL |
91 | } |
92 | ||
93 | /** | |
4323add6 | 94 | * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode |
b97bf3fd | 95 | */ |
31e3c3f6 | 96 | static int tipc_core_start(void) |
b97bf3fd | 97 | { |
9fe7ed47 | 98 | int err; |
b97bf3fd | 99 | |
b97bf3fd | 100 | get_random_bytes(&tipc_random, sizeof(tipc_random)); |
b97bf3fd | 101 | |
9fe7ed47 YX |
102 | err = tipc_ref_table_init(tipc_max_ports, tipc_random); |
103 | if (err) | |
104 | goto out_reftbl; | |
105 | ||
106 | err = tipc_nametbl_init(); | |
107 | if (err) | |
108 | goto out_nametbl; | |
109 | ||
110 | err = tipc_netlink_start(); | |
111 | if (err) | |
112 | goto out_netlink; | |
113 | ||
114 | err = tipc_socket_init(); | |
115 | if (err) | |
116 | goto out_socket; | |
117 | ||
118 | err = tipc_register_sysctl(); | |
119 | if (err) | |
120 | goto out_sysctl; | |
121 | ||
122 | err = tipc_subscr_start(); | |
123 | if (err) | |
124 | goto out_subscr; | |
125 | ||
970122fd YX |
126 | err = tipc_bearer_setup(); |
127 | if (err) | |
128 | goto out_bearer; | |
129 | ||
9fe7ed47 | 130 | return 0; |
970122fd | 131 | out_bearer: |
9fe7ed47 YX |
132 | tipc_subscr_stop(); |
133 | out_subscr: | |
134 | tipc_unregister_sysctl(); | |
135 | out_sysctl: | |
136 | tipc_socket_stop(); | |
137 | out_socket: | |
138 | tipc_netlink_stop(); | |
139 | out_netlink: | |
140 | tipc_nametbl_stop(); | |
141 | out_nametbl: | |
142 | tipc_ref_table_stop(); | |
143 | out_reftbl: | |
9fe7ed47 | 144 | return err; |
b97bf3fd PL |
145 | } |
146 | ||
b97bf3fd PL |
147 | static int __init tipc_init(void) |
148 | { | |
149 | int res; | |
150 | ||
2cf8aa19 | 151 | pr_info("Activated (version " TIPC_MOD_VER ")\n"); |
b97bf3fd PL |
152 | |
153 | tipc_own_addr = 0; | |
ee983ac7 | 154 | tipc_max_ports = CONFIG_TIPC_PORTS; |
b97bf3fd PL |
155 | tipc_net_id = 4711; |
156 | ||
6163a194 JPM |
157 | sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 << |
158 | TIPC_LOW_IMPORTANCE; | |
159 | sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 << | |
cc79dd1b | 160 | TIPC_CRITICAL_IMPORTANCE; |
6163a194 | 161 | sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT; |
cc79dd1b | 162 | |
2db9983a AS |
163 | res = tipc_core_start(); |
164 | if (res) | |
2cf8aa19 | 165 | pr_err("Unable to start in single node mode\n"); |
c4307285 | 166 | else |
2cf8aa19 | 167 | pr_info("Started in single node mode\n"); |
c4307285 | 168 | return res; |
b97bf3fd PL |
169 | } |
170 | ||
171 | static void __exit tipc_exit(void) | |
172 | { | |
4323add6 | 173 | tipc_core_stop(); |
2cf8aa19 | 174 | pr_info("Deactivated\n"); |
b97bf3fd PL |
175 | } |
176 | ||
177 | module_init(tipc_init); | |
178 | module_exit(tipc_exit); | |
179 | ||
180 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); | |
181 | MODULE_LICENSE("Dual BSD/GPL"); | |
a592ea63 | 182 | MODULE_VERSION(TIPC_MOD_VER); |