blob: 6fc4e3cca49ae899d67655ec20fe0152f5fbfb7a [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/bearer.c: TIPC bearer code
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Jon Paul Maloy35c55c92016-06-13 20:46:22 -04004 * Copyright (c) 1996-2006, 2013-2016, Ericsson AB
Ying Xuee4d050c2013-12-10 20:45:43 -08005 * Copyright (c) 2004-2006, 2010-2013, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 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.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * 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
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
Ying Xue7f9f95d2015-01-09 15:27:06 +080037#include <net/sock.h>
Per Lidenb97bf3f2006-01-02 19:04:38 +010038#include "core.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010039#include "bearer.h"
Richard Alpe0655f6a2014-11-20 10:29:07 +010040#include "link.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010041#include "discover.h"
Jon Paul Maloy35c55c92016-06-13 20:46:22 -040042#include "monitor.h"
Ying Xue1da46562015-01-09 15:27:07 +080043#include "bcast.h"
Richard Alpe49cc66e2016-03-04 17:04:42 +010044#include "netlink.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010045
Patrick McHardya29a1942013-04-17 06:18:28 +000046#define MAX_ADDR_STR 60
Per Lidenb97bf3f2006-01-02 19:04:38 +010047
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080048static struct tipc_media * const media_info_array[] = {
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080049 &eth_media_info,
50#ifdef CONFIG_TIPC_MEDIA_IB
51 &ib_media_info,
52#endif
Erik Hugned0f91932015-03-05 10:23:49 +010053#ifdef CONFIG_TIPC_MEDIA_UDP
54 &udp_media_info,
55#endif
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080056 NULL
57};
Per Lidenb97bf3f2006-01-02 19:04:38 +010058
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -040059static struct tipc_bearer *bearer_get(struct net *net, int bearer_id)
60{
61 struct tipc_net *tn = tipc_net(net);
62
63 return rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
64}
65
Jon Paul Maloy1a906322015-11-19 14:30:47 -050066static void bearer_disable(struct net *net, struct tipc_bearer *b);
Allan Stephens3a777ff2011-04-21 13:58:26 -050067
Per Lidenb97bf3f2006-01-02 19:04:38 +010068/**
Allan Stephens5c216e12011-10-18 11:34:29 -040069 * tipc_media_find - locates specified media object by name
Per Lidenb97bf3f2006-01-02 19:04:38 +010070 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050071struct tipc_media *tipc_media_find(const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +010072{
Per Lidenb97bf3f2006-01-02 19:04:38 +010073 u32 i;
74
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080075 for (i = 0; media_info_array[i] != NULL; i++) {
76 if (!strcmp(media_info_array[i]->name, name))
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080077 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +010078 }
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080079 return media_info_array[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +010080}
81
82/**
Allan Stephensc79be452011-10-06 16:40:55 -040083 * media_find_id - locates specified media object by type identifier
84 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050085static struct tipc_media *media_find_id(u8 type)
Allan Stephensc79be452011-10-06 16:40:55 -040086{
87 u32 i;
88
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080089 for (i = 0; media_info_array[i] != NULL; i++) {
90 if (media_info_array[i]->type_id == type)
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080091 break;
Allan Stephensc79be452011-10-06 16:40:55 -040092 }
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080093 return media_info_array[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +010094}
95
96/**
Per Liden4323add2006-01-18 00:38:21 +010097 * tipc_media_addr_printf - record media address in print buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +010098 */
Erik Hugnedc1aed32012-06-29 00:50:23 -040099void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100100{
Allan Stephensc61b6662011-10-07 11:31:49 -0400101 char addr_str[MAX_ADDR_STR];
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500102 struct tipc_media *m;
Erik Hugnedc1aed32012-06-29 00:50:23 -0400103 int ret;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100104
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500105 m = media_find_id(a->media_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100106
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500107 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
108 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
Allan Stephensc61b6662011-10-07 11:31:49 -0400109 else {
Allan Stephensc61b6662011-10-07 11:31:49 -0400110 u32 i;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100111
Richard Alpe941787b2015-02-09 09:50:19 +0100112 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
Allan Stephens3d749a62011-10-07 15:19:11 -0400113 for (i = 0; i < sizeof(a->value); i++)
Richard Alpe941787b2015-02-09 09:50:19 +0100114 ret += scnprintf(buf - ret, len + ret,
Erik Hugnedc1aed32012-06-29 00:50:23 -0400115 "-%02x", a->value[i]);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100116 }
117}
118
119/**
Per Lidenb97bf3f2006-01-02 19:04:38 +0100120 * bearer_name_validate - validate & (optionally) deconstruct bearer name
Ben Hutchings2c530402012-07-10 10:55:09 +0000121 * @name: ptr to bearer name string
122 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900123 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100124 * Returns 1 if bearer name is valid, otherwise 0.
125 */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900126static int bearer_name_validate(const char *name,
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500127 struct tipc_bearer_names *name_parts)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100128{
129 char name_copy[TIPC_MAX_BEARER_NAME];
130 char *media_name;
131 char *if_name;
132 u32 media_len;
133 u32 if_len;
134
135 /* copy bearer name & ensure length is OK */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100136 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
137 /* need above in case non-Posix strncpy() doesn't pad with nulls */
138 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
139 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
140 return 0;
141
142 /* ensure all component parts of bearer name are present */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100143 media_name = name_copy;
Allan Stephens2db99832010-12-31 18:59:33 +0000144 if_name = strchr(media_name, ':');
145 if (if_name == NULL)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100146 return 0;
147 *(if_name++) = 0;
148 media_len = if_name - media_name;
149 if_len = strlen(if_name) + 1;
150
151 /* validate component parts of bearer name */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900152 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
Ying Xuefc073932012-08-16 12:09:08 +0000153 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100154 return 0;
155
156 /* return bearer name components, if necessary */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100157 if (name_parts) {
158 strcpy(name_parts->media_name, media_name);
159 strcpy(name_parts->if_name, if_name);
160 }
161 return 1;
162}
163
164/**
Allan Stephens5c216e12011-10-18 11:34:29 -0400165 * tipc_bearer_find - locates bearer object with matching bearer name
Per Lidenb97bf3f2006-01-02 19:04:38 +0100166 */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800167struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100168{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800169 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500170 struct tipc_bearer *b;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100171 u32 i;
172
Ying Xue3874ccb2014-03-27 12:54:33 +0800173 for (i = 0; i < MAX_BEARERS; i++) {
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500174 b = rtnl_dereference(tn->bearer_list[i]);
175 if (b && (!strcmp(b->name, name)))
176 return b;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100177 }
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800178 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100179}
180
Parthasarathy Bhuvaraganff0d3e72016-07-26 08:47:21 +0200181/* tipc_bearer_get_name - get the bearer name from its id.
182 * @net: network namespace
183 * @name: a pointer to the buffer where the name will be stored.
184 * @bearer_id: the id to get the name from.
185 */
186int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
187{
188 struct tipc_net *tn = tipc_net(net);
189 struct tipc_bearer *b;
190
191 if (bearer_id >= MAX_BEARERS)
192 return -EINVAL;
193
194 b = rtnl_dereference(tn->bearer_list[bearer_id]);
195 if (!b)
196 return -EINVAL;
197
198 strcpy(name, b->name);
199 return 0;
200}
201
Ying Xue7f9f95d2015-01-09 15:27:06 +0800202void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100203{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800204 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500205 struct tipc_bearer *b;
Ying Xue7a2f7d12014-04-21 10:55:46 +0800206
207 rcu_read_lock();
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500208 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
209 if (b)
210 tipc_disc_add_dest(b->link_req);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800211 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100212}
213
Ying Xue7f9f95d2015-01-09 15:27:06 +0800214void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100215{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800216 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500217 struct tipc_bearer *b;
Ying Xue7a2f7d12014-04-21 10:55:46 +0800218
219 rcu_read_lock();
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500220 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
221 if (b)
222 tipc_disc_remove_dest(b->link_req);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800223 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100224}
225
Allan Stephensb274f4a2010-05-11 14:30:16 +0000226/**
Per Lidenb97bf3f2006-01-02 19:04:38 +0100227 * tipc_enable_bearer - enable bearer with the given name
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900228 */
Richard Alpe9ab15462015-02-09 09:50:05 +0100229static int tipc_enable_bearer(struct net *net, const char *name,
Erik Hugned0f91932015-03-05 10:23:49 +0100230 u32 disc_domain, u32 priority,
231 struct nlattr *attr[])
Per Lidenb97bf3f2006-01-02 19:04:38 +0100232{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800233 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500234 struct tipc_bearer *b;
235 struct tipc_media *m;
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500236 struct tipc_bearer_names b_names;
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400237 struct sk_buff *skb;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100238 char addr_string[16];
239 u32 bearer_id;
240 u32 with_this_prio;
241 u32 i;
242 int res = -EINVAL;
243
Ying Xue34747532015-01-09 15:27:10 +0800244 if (!tn->own_addr) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400245 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
246 name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100247 return -ENOPROTOOPT;
Allan Stephensa10bd922006-06-25 23:52:17 -0700248 }
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500249 if (!bearer_name_validate(name, &b_names)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400250 pr_warn("Bearer <%s> rejected, illegal name\n", name);
Per Liden16cb4b32006-01-13 22:22:22 +0100251 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700252 }
Allan Stephens66e019a2011-04-20 16:24:07 -0500253 if (tipc_addr_domain_valid(disc_domain) &&
Ying Xue34747532015-01-09 15:27:10 +0800254 (disc_domain != tn->own_addr)) {
255 if (tipc_in_scope(disc_domain, tn->own_addr)) {
Parthasarathy Bhuvaragan9ff26e92016-07-26 08:47:18 +0200256 disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
Allan Stephens66e019a2011-04-20 16:24:07 -0500257 res = 0; /* accept any node in own cluster */
Ying Xue34747532015-01-09 15:27:10 +0800258 } else if (in_own_cluster_exact(net, disc_domain))
Allan Stephens66e019a2011-04-20 16:24:07 -0500259 res = 0; /* accept specified node in own cluster */
260 }
261 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400262 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
263 name);
Allan Stephensa10bd922006-06-25 23:52:17 -0700264 return -EINVAL;
265 }
Allan Stephens9efde4a2011-11-03 13:15:10 -0400266 if ((priority > TIPC_MAX_LINK_PRI) &&
Allan Stephensa10bd922006-06-25 23:52:17 -0700267 (priority != TIPC_MEDIA_LINK_PRI)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400268 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100269 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700270 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100271
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500272 m = tipc_media_find(b_names.media_name);
273 if (!m) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400274 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
275 name, b_names.media_name);
Ying Xue7216cd92014-04-21 10:55:48 +0800276 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100277 }
Per Liden16cb4b32006-01-13 22:22:22 +0100278
279 if (priority == TIPC_MEDIA_LINK_PRI)
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500280 priority = m->priority;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100281
282restart:
283 bearer_id = MAX_BEARERS;
284 with_this_prio = 1;
285 for (i = MAX_BEARERS; i-- != 0; ) {
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500286 b = rtnl_dereference(tn->bearer_list[i]);
287 if (!b) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100288 bearer_id = i;
289 continue;
290 }
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500291 if (!strcmp(name, b->name)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400292 pr_warn("Bearer <%s> rejected, already enabled\n",
293 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800294 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100295 }
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500296 if ((b->priority == priority) &&
Per Lidenb97bf3f2006-01-02 19:04:38 +0100297 (++with_this_prio > 2)) {
298 if (priority-- == 0) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400299 pr_warn("Bearer <%s> rejected, duplicate priority\n",
300 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800301 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100302 }
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400303 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
304 name, priority + 1, priority);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100305 goto restart;
306 }
307 }
308 if (bearer_id >= MAX_BEARERS) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400309 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
310 name, MAX_BEARERS);
Ying Xue7216cd92014-04-21 10:55:48 +0800311 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100312 }
313
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500314 b = kzalloc(sizeof(*b), GFP_ATOMIC);
315 if (!b)
Ying Xue7216cd92014-04-21 10:55:48 +0800316 return -ENOMEM;
317
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500318 strcpy(b->name, name);
319 b->media = m;
320 res = m->enable_media(net, b, attr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100321 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400322 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
323 name, -res);
Ying Xue7216cd92014-04-21 10:55:48 +0800324 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100325 }
326
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500327 b->identity = bearer_id;
328 b->tolerance = m->tolerance;
329 b->window = m->window;
330 b->domain = disc_domain;
331 b->net_plane = bearer_id + 'A';
332 b->priority = priority;
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400333 test_and_set_bit_lock(0, &b->up);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500334
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400335 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500336 if (res) {
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500337 bearer_disable(net, b);
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400338 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
339 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800340 return -EINVAL;
Allan Stephens3a777ff2011-04-21 13:58:26 -0500341 }
Ying Xue3874ccb2014-03-27 12:54:33 +0800342
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500343 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400344 if (skb)
345 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
Jon Paul Maloy35c55c92016-06-13 20:46:22 -0400346
347 if (tipc_mon_create(net, bearer_id))
348 return -ENOMEM;
349
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400350 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
351 name,
352 tipc_addr_string_fill(addr_string, disc_domain), priority);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100353 return res;
354}
355
356/**
Erik Hugne512137e2013-12-06 10:08:00 -0500357 * tipc_reset_bearer - Reset all links established over this bearer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100358 */
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500359static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100360{
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500361 pr_info("Resetting bearer <%s>\n", b->name);
362 tipc_node_delete_links(net, b->identity);
363 tipc_disc_reset(net, b);
Allan Stephens0e35fd52008-07-14 22:44:01 -0700364 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100365}
366
Jon Paul Maloy1fc07f32016-07-11 16:08:37 -0400367/* tipc_bearer_reset_all - reset all links on all bearers
368 */
369void tipc_bearer_reset_all(struct net *net)
370{
Jon Paul Maloy1fc07f32016-07-11 16:08:37 -0400371 struct tipc_bearer *b;
372 int i;
373
374 for (i = 0; i < MAX_BEARERS; i++) {
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400375 b = bearer_get(net, i);
376 if (b)
377 clear_bit_unlock(0, &b->up);
378 }
379 for (i = 0; i < MAX_BEARERS; i++) {
380 b = bearer_get(net, i);
Jon Paul Maloy1fc07f32016-07-11 16:08:37 -0400381 if (b)
382 tipc_reset_bearer(net, b);
383 }
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400384 for (i = 0; i < MAX_BEARERS; i++) {
385 b = bearer_get(net, i);
386 if (b)
387 test_and_set_bit_lock(0, &b->up);
388 }
Jon Paul Maloy1fc07f32016-07-11 16:08:37 -0400389}
390
Per Lidenb97bf3f2006-01-02 19:04:38 +0100391/**
Paul Gortmaker617d3c72012-04-30 15:29:02 -0400392 * bearer_disable
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900393 *
Ying Xue7216cd92014-04-21 10:55:48 +0800394 * Note: This routine assumes caller holds RTNL lock.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100395 */
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500396static void bearer_disable(struct net *net, struct tipc_bearer *b)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100397{
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400398 struct tipc_net *tn = tipc_net(net);
399 int bearer_id = b->identity;
Ying Xue3874ccb2014-03-27 12:54:33 +0800400
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500401 pr_info("Disabling bearer <%s>\n", b->name);
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400402 clear_bit_unlock(0, &b->up);
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400403 tipc_node_delete_links(net, bearer_id);
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400404 b->media->disable_media(b);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500405 RCU_INIT_POINTER(b->media_ptr, NULL);
406 if (b->link_req)
407 tipc_disc_delete(b->link_req);
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400408 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500409 kfree_rcu(b, rcu);
Jon Paul Maloy35c55c92016-06-13 20:46:22 -0400410 tipc_mon_delete(net, bearer_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100411}
412
Erik Hugned0f91932015-03-05 10:23:49 +0100413int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
414 struct nlattr *attr[])
Ying Xuee4d050c2013-12-10 20:45:43 -0800415{
416 struct net_device *dev;
417 char *driver_name = strchr((const char *)b->name, ':') + 1;
418
419 /* Find device with specified name */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800420 dev = dev_get_by_name(net, driver_name);
Ying Xuee4d050c2013-12-10 20:45:43 -0800421 if (!dev)
422 return -ENODEV;
423
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400424 /* Associate TIPC bearer with L2 bearer */
Ying Xue2231c5a2014-04-21 10:55:47 +0800425 rcu_assign_pointer(b->media_ptr, dev);
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400426 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
Ying Xuee4d050c2013-12-10 20:45:43 -0800427 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
428 b->bcast_addr.media_id = b->media->type_id;
429 b->bcast_addr.broadcast = 1;
430 b->mtu = dev->mtu;
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400431 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
Ying Xuee4d050c2013-12-10 20:45:43 -0800432 rcu_assign_pointer(dev->tipc_ptr, b);
433 return 0;
434}
435
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400436/* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
Ying Xuee4d050c2013-12-10 20:45:43 -0800437 *
Jon Paul Maloy282b3a02015-10-15 14:52:45 -0400438 * Mark L2 bearer as inactive so that incoming buffers are thrown away
Ying Xuee4d050c2013-12-10 20:45:43 -0800439 */
440void tipc_disable_l2_media(struct tipc_bearer *b)
441{
Ying Xue2231c5a2014-04-21 10:55:47 +0800442 struct net_device *dev;
443
444 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
Ying Xuee4d050c2013-12-10 20:45:43 -0800445 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
Ying Xuef1c8d8c2014-04-21 10:55:49 +0800446 synchronize_net();
Ying Xuee4d050c2013-12-10 20:45:43 -0800447 dev_put(dev);
448}
449
450/**
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400451 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400452 * @skb: the packet to be sent
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500453 * @b: the bearer through which the packet is to be sent
Ying Xuee4d050c2013-12-10 20:45:43 -0800454 * @dest: peer destination address
455 */
Jon Paul Maloy7214bcf2015-10-22 08:51:45 -0400456int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
Ying Xue1da46562015-01-09 15:27:07 +0800457 struct tipc_bearer *b, struct tipc_media_addr *dest)
Ying Xuee4d050c2013-12-10 20:45:43 -0800458{
Ying Xue2231c5a2014-04-21 10:55:47 +0800459 struct net_device *dev;
Ying Xuee4d050c2013-12-10 20:45:43 -0800460 int delta;
Ying Xue2231c5a2014-04-21 10:55:47 +0800461
462 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
463 if (!dev)
464 return 0;
Ying Xuee4d050c2013-12-10 20:45:43 -0800465
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400466 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
467 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
468 kfree_skb(skb);
469 return 0;
470 }
Jon Paul Maloy7214bcf2015-10-22 08:51:45 -0400471 skb_reset_network_header(skb);
472 skb->dev = dev;
473 skb->protocol = htons(ETH_P_TIPC);
474 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
475 dev->dev_addr, skb->len);
476 dev_queue_xmit(skb);
Ying Xuee4d050c2013-12-10 20:45:43 -0800477 return 0;
478}
479
Jon Paul Maloy959e1782015-10-22 08:51:43 -0400480int tipc_bearer_mtu(struct net *net, u32 bearer_id)
481{
482 int mtu = 0;
483 struct tipc_bearer *b;
484
485 rcu_read_lock();
486 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
487 if (b)
488 mtu = b->mtu;
489 rcu_read_unlock();
490 return mtu;
491}
492
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400493/* tipc_bearer_xmit_skb - sends buffer to destination over bearer
494 */
495void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
496 struct sk_buff *skb,
497 struct tipc_media_addr *dest)
498{
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400499 struct tipc_msg *hdr = buf_msg(skb);
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400500 struct tipc_bearer *b;
501
502 rcu_read_lock();
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400503 b = bearer_get(net, bearer_id);
504 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400505 b->media->send_msg(net, skb, b, dest);
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400506 else
507 kfree_skb(skb);
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400508 rcu_read_unlock();
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400509}
510
Jon Paul Maloyaf9b0282015-07-16 16:54:24 -0400511/* tipc_bearer_xmit() -send buffer to destination over bearer
512 */
513void tipc_bearer_xmit(struct net *net, u32 bearer_id,
514 struct sk_buff_head *xmitq,
515 struct tipc_media_addr *dst)
516{
Jon Paul Maloyaf9b0282015-07-16 16:54:24 -0400517 struct tipc_bearer *b;
518 struct sk_buff *skb, *tmp;
519
520 if (skb_queue_empty(xmitq))
521 return;
522
523 rcu_read_lock();
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400524 b = bearer_get(net, bearer_id);
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400525 if (unlikely(!b))
526 __skb_queue_purge(xmitq);
527 skb_queue_walk_safe(xmitq, skb, tmp) {
528 __skb_dequeue(xmitq);
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400529 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
530 b->media->send_msg(net, skb, b, dst);
531 else
532 kfree(skb);
Jon Paul Maloyaf9b0282015-07-16 16:54:24 -0400533 }
534 rcu_read_unlock();
535}
536
Jon Paul Maloyb06b2812015-10-22 08:51:42 -0400537/* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
538 */
539void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
540 struct sk_buff_head *xmitq)
541{
542 struct tipc_net *tn = tipc_net(net);
543 int net_id = tn->net_id;
544 struct tipc_bearer *b;
545 struct sk_buff *skb, *tmp;
546 struct tipc_msg *hdr;
547
548 rcu_read_lock();
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400549 b = bearer_get(net, bearer_id);
550 if (unlikely(!b || !test_bit(0, &b->up)))
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400551 __skb_queue_purge(xmitq);
552 skb_queue_walk_safe(xmitq, skb, tmp) {
553 hdr = buf_msg(skb);
554 msg_set_non_seq(hdr, 1);
555 msg_set_mc_netid(hdr, net_id);
556 __skb_dequeue(xmitq);
557 b->media->send_msg(net, skb, b, &b->bcast_addr);
Jon Paul Maloyb06b2812015-10-22 08:51:42 -0400558 }
559 rcu_read_unlock();
560}
561
Ying Xue6e967ad2013-12-10 20:45:42 -0800562/**
563 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
564 * @buf: the received packet
565 * @dev: the net device that the packet was received on
566 * @pt: the packet_type structure which was used to register this handler
567 * @orig_dev: the original receive net device in case the device is a bond
568 *
569 * Accept only packets explicitly sent to this node, or broadcast packets;
570 * ignores packets sent using interface multicast, and traffic sent to other
571 * nodes (which can happen if interface is running in promiscuous mode).
572 */
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400573static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
Ying Xue6e967ad2013-12-10 20:45:42 -0800574 struct packet_type *pt, struct net_device *orig_dev)
575{
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500576 struct tipc_bearer *b;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100577
Ying Xue6e967ad2013-12-10 20:45:42 -0800578 rcu_read_lock();
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500579 b = rcu_dereference_rtnl(dev->tipc_ptr);
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400580 if (likely(b && test_bit(0, &b->up) &&
581 (skb->pkt_type <= PACKET_BROADCAST))) {
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400582 skb->next = NULL;
583 tipc_rcv(dev_net(dev), skb, b);
584 rcu_read_unlock();
585 return NET_RX_SUCCESS;
Ying Xue6e967ad2013-12-10 20:45:42 -0800586 }
587 rcu_read_unlock();
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400588 kfree_skb(skb);
Ying Xue6e967ad2013-12-10 20:45:42 -0800589 return NET_RX_DROP;
590}
591
592/**
593 * tipc_l2_device_event - handle device events from network device
594 * @nb: the context of the notification
595 * @evt: the type of event
596 * @ptr: the net device that the event was on
597 *
598 * This function is called by the Ethernet driver in case of link
599 * change event.
600 */
601static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
602 void *ptr)
603{
Ying Xue6e967ad2013-12-10 20:45:42 -0800604 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Ying Xuec93d3ba2015-01-09 15:27:04 +0800605 struct net *net = dev_net(dev);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500606 struct tipc_bearer *b;
Ying Xue6e967ad2013-12-10 20:45:42 -0800607
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500608 b = rtnl_dereference(dev->tipc_ptr);
609 if (!b)
Ying Xue6e967ad2013-12-10 20:45:42 -0800610 return NOTIFY_DONE;
Ying Xue6e967ad2013-12-10 20:45:42 -0800611
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500612 b->mtu = dev->mtu;
Ying Xue6e967ad2013-12-10 20:45:42 -0800613
614 switch (evt) {
615 case NETDEV_CHANGE:
616 if (netif_carrier_ok(dev))
617 break;
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400618 case NETDEV_UP:
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400619 test_and_set_bit_lock(0, &b->up);
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400620 break;
Jon Paul Maloy282b3a02015-10-15 14:52:45 -0400621 case NETDEV_GOING_DOWN:
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400622 clear_bit_unlock(0, &b->up);
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400623 tipc_reset_bearer(net, b);
624 break;
Ying Xue6e967ad2013-12-10 20:45:42 -0800625 case NETDEV_CHANGEMTU:
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500626 tipc_reset_bearer(net, b);
Erik Hugnea21a5842014-03-28 10:32:08 +0100627 break;
Ying Xue6e967ad2013-12-10 20:45:42 -0800628 case NETDEV_CHANGEADDR:
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500629 b->media->raw2addr(b, &b->addr,
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400630 (char *)dev->dev_addr);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500631 tipc_reset_bearer(net, b);
Ying Xue6e967ad2013-12-10 20:45:42 -0800632 break;
633 case NETDEV_UNREGISTER:
634 case NETDEV_CHANGENAME:
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500635 bearer_disable(dev_net(dev), b);
Ying Xue6e967ad2013-12-10 20:45:42 -0800636 break;
637 }
Ying Xue6e967ad2013-12-10 20:45:42 -0800638 return NOTIFY_OK;
639}
640
641static struct packet_type tipc_packet_type __read_mostly = {
Joe Perches184593c2014-03-12 10:04:20 -0700642 .type = htons(ETH_P_TIPC),
Ying Xue6e967ad2013-12-10 20:45:42 -0800643 .func = tipc_l2_rcv_msg,
644};
645
646static struct notifier_block notifier = {
647 .notifier_call = tipc_l2_device_event,
648 .priority = 0,
649};
650
651int tipc_bearer_setup(void)
652{
Ying Xue970122f2014-02-20 11:32:50 +0800653 int err;
654
655 err = register_netdevice_notifier(&notifier);
656 if (err)
657 return err;
Ying Xue6e967ad2013-12-10 20:45:42 -0800658 dev_add_pack(&tipc_packet_type);
Ying Xue970122f2014-02-20 11:32:50 +0800659 return 0;
Ying Xue6e967ad2013-12-10 20:45:42 -0800660}
661
662void tipc_bearer_cleanup(void)
663{
664 unregister_netdevice_notifier(&notifier);
665 dev_remove_pack(&tipc_packet_type);
666}
Per Lidenb97bf3f2006-01-02 19:04:38 +0100667
Ying Xuef2f98002015-01-09 15:27:05 +0800668void tipc_bearer_stop(struct net *net)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100669{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800670 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500671 struct tipc_bearer *b;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100672 u32 i;
673
Per Lidenb97bf3f2006-01-02 19:04:38 +0100674 for (i = 0; i < MAX_BEARERS; i++) {
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500675 b = rtnl_dereference(tn->bearer_list[i]);
676 if (b) {
677 bearer_disable(net, b);
Ying Xue7f9f95d2015-01-09 15:27:06 +0800678 tn->bearer_list[i] = NULL;
Ying Xue3874ccb2014-03-27 12:54:33 +0800679 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100680 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100681}
Richard Alpe0655f6a2014-11-20 10:29:07 +0100682
Richard Alpe35b9dd72014-11-20 10:29:08 +0100683/* Caller should hold rtnl_lock to protect the bearer */
Richard Alped8182802014-11-24 11:10:29 +0100684static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200685 struct tipc_bearer *bearer, int nlflags)
Richard Alpe35b9dd72014-11-20 10:29:08 +0100686{
687 void *hdr;
688 struct nlattr *attrs;
689 struct nlattr *prop;
690
Richard Alpebfb3e5d2015-02-09 09:50:03 +0100691 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200692 nlflags, TIPC_NL_BEARER_GET);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100693 if (!hdr)
694 return -EMSGSIZE;
695
696 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
697 if (!attrs)
698 goto msg_full;
699
700 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
701 goto attr_msg_full;
702
703 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
704 if (!prop)
705 goto prop_msg_full;
706 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
707 goto prop_msg_full;
708 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
709 goto prop_msg_full;
710 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
711 goto prop_msg_full;
712
713 nla_nest_end(msg->skb, prop);
714 nla_nest_end(msg->skb, attrs);
715 genlmsg_end(msg->skb, hdr);
716
717 return 0;
718
719prop_msg_full:
720 nla_nest_cancel(msg->skb, prop);
721attr_msg_full:
722 nla_nest_cancel(msg->skb, attrs);
723msg_full:
724 genlmsg_cancel(msg->skb, hdr);
725
726 return -EMSGSIZE;
727}
728
729int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
730{
731 int err;
732 int i = cb->args[0];
733 struct tipc_bearer *bearer;
734 struct tipc_nl_msg msg;
Ying Xue7f9f95d2015-01-09 15:27:06 +0800735 struct net *net = sock_net(skb->sk);
736 struct tipc_net *tn = net_generic(net, tipc_net_id);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100737
738 if (i == MAX_BEARERS)
739 return 0;
740
741 msg.skb = skb;
742 msg.portid = NETLINK_CB(cb->skb).portid;
743 msg.seq = cb->nlh->nlmsg_seq;
744
745 rtnl_lock();
746 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800747 bearer = rtnl_dereference(tn->bearer_list[i]);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100748 if (!bearer)
749 continue;
750
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200751 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100752 if (err)
753 break;
754 }
755 rtnl_unlock();
756
757 cb->args[0] = i;
758 return skb->len;
759}
760
761int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
762{
763 int err;
764 char *name;
765 struct sk_buff *rep;
766 struct tipc_bearer *bearer;
767 struct tipc_nl_msg msg;
768 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Ying Xue7f9f95d2015-01-09 15:27:06 +0800769 struct net *net = genl_info_net(info);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100770
771 if (!info->attrs[TIPC_NLA_BEARER])
772 return -EINVAL;
773
774 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
775 info->attrs[TIPC_NLA_BEARER],
776 tipc_nl_bearer_policy);
777 if (err)
778 return err;
779
780 if (!attrs[TIPC_NLA_BEARER_NAME])
781 return -EINVAL;
782 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
783
784 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
785 if (!rep)
786 return -ENOMEM;
787
788 msg.skb = rep;
789 msg.portid = info->snd_portid;
790 msg.seq = info->snd_seq;
791
792 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800793 bearer = tipc_bearer_find(net, name);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100794 if (!bearer) {
795 err = -EINVAL;
796 goto err_out;
797 }
798
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200799 err = __tipc_nl_add_bearer(&msg, bearer, 0);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100800 if (err)
801 goto err_out;
802 rtnl_unlock();
803
804 return genlmsg_reply(rep, info);
805err_out:
806 rtnl_unlock();
807 nlmsg_free(rep);
808
809 return err;
810}
811
Richard Alpe0655f6a2014-11-20 10:29:07 +0100812int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
813{
814 int err;
815 char *name;
816 struct tipc_bearer *bearer;
817 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Richard Alpe9ab15462015-02-09 09:50:05 +0100818 struct net *net = sock_net(skb->sk);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100819
820 if (!info->attrs[TIPC_NLA_BEARER])
821 return -EINVAL;
822
823 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
824 info->attrs[TIPC_NLA_BEARER],
825 tipc_nl_bearer_policy);
826 if (err)
827 return err;
828
829 if (!attrs[TIPC_NLA_BEARER_NAME])
830 return -EINVAL;
831
832 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
833
834 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800835 bearer = tipc_bearer_find(net, name);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100836 if (!bearer) {
837 rtnl_unlock();
838 return -EINVAL;
839 }
840
Jon Paul Maloyb1c29f62015-05-14 10:46:11 -0400841 bearer_disable(net, bearer);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100842 rtnl_unlock();
843
844 return 0;
845}
846
847int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
848{
849 int err;
850 char *bearer;
851 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Richard Alpe9ab15462015-02-09 09:50:05 +0100852 struct net *net = sock_net(skb->sk);
853 struct tipc_net *tn = net_generic(net, tipc_net_id);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100854 u32 domain;
855 u32 prio;
856
857 prio = TIPC_MEDIA_LINK_PRI;
Parthasarathy Bhuvaragan9ff26e92016-07-26 08:47:18 +0200858 domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
Richard Alpe0655f6a2014-11-20 10:29:07 +0100859
860 if (!info->attrs[TIPC_NLA_BEARER])
861 return -EINVAL;
862
863 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
864 info->attrs[TIPC_NLA_BEARER],
865 tipc_nl_bearer_policy);
866 if (err)
867 return err;
868
869 if (!attrs[TIPC_NLA_BEARER_NAME])
870 return -EINVAL;
871
872 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
873
874 if (attrs[TIPC_NLA_BEARER_DOMAIN])
875 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
876
877 if (attrs[TIPC_NLA_BEARER_PROP]) {
878 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
879
880 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
881 props);
882 if (err)
883 return err;
884
885 if (props[TIPC_NLA_PROP_PRIO])
886 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
887 }
888
889 rtnl_lock();
Erik Hugned0f91932015-03-05 10:23:49 +0100890 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100891 if (err) {
892 rtnl_unlock();
893 return err;
894 }
895 rtnl_unlock();
896
897 return 0;
898}
Richard Alpe315c00b2014-11-20 10:29:09 +0100899
900int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
901{
902 int err;
903 char *name;
904 struct tipc_bearer *b;
905 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Richard Alpec3d6fb82015-05-06 13:58:54 +0200906 struct net *net = sock_net(skb->sk);
Richard Alpe315c00b2014-11-20 10:29:09 +0100907
908 if (!info->attrs[TIPC_NLA_BEARER])
909 return -EINVAL;
910
911 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
912 info->attrs[TIPC_NLA_BEARER],
913 tipc_nl_bearer_policy);
914 if (err)
915 return err;
916
917 if (!attrs[TIPC_NLA_BEARER_NAME])
918 return -EINVAL;
919 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
920
921 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800922 b = tipc_bearer_find(net, name);
Richard Alpe315c00b2014-11-20 10:29:09 +0100923 if (!b) {
924 rtnl_unlock();
925 return -EINVAL;
926 }
927
928 if (attrs[TIPC_NLA_BEARER_PROP]) {
929 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
930
931 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
932 props);
933 if (err) {
934 rtnl_unlock();
935 return err;
936 }
937
938 if (props[TIPC_NLA_PROP_TOL])
939 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
940 if (props[TIPC_NLA_PROP_PRIO])
941 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
942 if (props[TIPC_NLA_PROP_WIN])
943 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
944 }
945 rtnl_unlock();
946
947 return 0;
948}
Richard Alpe46f15c62014-11-20 10:29:15 +0100949
Richard Alped8182802014-11-24 11:10:29 +0100950static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200951 struct tipc_media *media, int nlflags)
Richard Alpe46f15c62014-11-20 10:29:15 +0100952{
953 void *hdr;
954 struct nlattr *attrs;
955 struct nlattr *prop;
956
Richard Alpebfb3e5d2015-02-09 09:50:03 +0100957 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200958 nlflags, TIPC_NL_MEDIA_GET);
Richard Alpe46f15c62014-11-20 10:29:15 +0100959 if (!hdr)
960 return -EMSGSIZE;
961
962 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
963 if (!attrs)
964 goto msg_full;
965
966 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
967 goto attr_msg_full;
968
969 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
970 if (!prop)
971 goto prop_msg_full;
972 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
973 goto prop_msg_full;
974 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
975 goto prop_msg_full;
976 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
977 goto prop_msg_full;
978
979 nla_nest_end(msg->skb, prop);
980 nla_nest_end(msg->skb, attrs);
981 genlmsg_end(msg->skb, hdr);
982
983 return 0;
984
985prop_msg_full:
986 nla_nest_cancel(msg->skb, prop);
987attr_msg_full:
988 nla_nest_cancel(msg->skb, attrs);
989msg_full:
990 genlmsg_cancel(msg->skb, hdr);
991
992 return -EMSGSIZE;
993}
994
995int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
996{
997 int err;
998 int i = cb->args[0];
999 struct tipc_nl_msg msg;
1000
1001 if (i == MAX_MEDIA)
1002 return 0;
1003
1004 msg.skb = skb;
1005 msg.portid = NETLINK_CB(cb->skb).portid;
1006 msg.seq = cb->nlh->nlmsg_seq;
1007
1008 rtnl_lock();
1009 for (; media_info_array[i] != NULL; i++) {
Nicolas Dichtelf2f67392015-04-28 18:33:50 +02001010 err = __tipc_nl_add_media(&msg, media_info_array[i],
1011 NLM_F_MULTI);
Richard Alpe46f15c62014-11-20 10:29:15 +01001012 if (err)
1013 break;
1014 }
1015 rtnl_unlock();
1016
1017 cb->args[0] = i;
1018 return skb->len;
1019}
1020
1021int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1022{
1023 int err;
1024 char *name;
1025 struct tipc_nl_msg msg;
1026 struct tipc_media *media;
1027 struct sk_buff *rep;
1028 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1029
1030 if (!info->attrs[TIPC_NLA_MEDIA])
1031 return -EINVAL;
1032
1033 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1034 info->attrs[TIPC_NLA_MEDIA],
1035 tipc_nl_media_policy);
1036 if (err)
1037 return err;
1038
1039 if (!attrs[TIPC_NLA_MEDIA_NAME])
1040 return -EINVAL;
1041 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1042
1043 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1044 if (!rep)
1045 return -ENOMEM;
1046
1047 msg.skb = rep;
1048 msg.portid = info->snd_portid;
1049 msg.seq = info->snd_seq;
1050
1051 rtnl_lock();
1052 media = tipc_media_find(name);
1053 if (!media) {
1054 err = -EINVAL;
1055 goto err_out;
1056 }
1057
Nicolas Dichtelf2f67392015-04-28 18:33:50 +02001058 err = __tipc_nl_add_media(&msg, media, 0);
Richard Alpe46f15c62014-11-20 10:29:15 +01001059 if (err)
1060 goto err_out;
1061 rtnl_unlock();
1062
1063 return genlmsg_reply(rep, info);
1064err_out:
1065 rtnl_unlock();
1066 nlmsg_free(rep);
1067
1068 return err;
1069}
Richard Alpe1e554172014-11-20 10:29:16 +01001070
1071int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1072{
1073 int err;
1074 char *name;
1075 struct tipc_media *m;
1076 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1077
1078 if (!info->attrs[TIPC_NLA_MEDIA])
1079 return -EINVAL;
1080
1081 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1082 info->attrs[TIPC_NLA_MEDIA],
1083 tipc_nl_media_policy);
1084
1085 if (!attrs[TIPC_NLA_MEDIA_NAME])
1086 return -EINVAL;
1087 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1088
1089 rtnl_lock();
1090 m = tipc_media_find(name);
1091 if (!m) {
1092 rtnl_unlock();
1093 return -EINVAL;
1094 }
1095
1096 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1097 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1098
1099 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1100 props);
1101 if (err) {
1102 rtnl_unlock();
1103 return err;
1104 }
1105
1106 if (props[TIPC_NLA_PROP_TOL])
1107 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1108 if (props[TIPC_NLA_PROP_PRIO])
1109 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1110 if (props[TIPC_NLA_PROP_WIN])
1111 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1112 }
1113 rtnl_unlock();
1114
1115 return 0;
1116}