blob: 648f2a67f3148272dbbf7fd43e3a0536b1cdab3c [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 *
Richard Alpe0655f6a2014-11-20 10:29:07 +01004 * Copyright (c) 1996-2006, 2013-2014, 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"
Ying Xue1da46562015-01-09 15:27:07 +080042#include "bcast.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010043
Patrick McHardya29a1942013-04-17 06:18:28 +000044#define MAX_ADDR_STR 60
Per Lidenb97bf3f2006-01-02 19:04:38 +010045
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080046static struct tipc_media * const media_info_array[] = {
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080047 &eth_media_info,
48#ifdef CONFIG_TIPC_MEDIA_IB
49 &ib_media_info,
50#endif
Erik Hugned0f91932015-03-05 10:23:49 +010051#ifdef CONFIG_TIPC_MEDIA_UDP
52 &udp_media_info,
53#endif
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080054 NULL
55};
Per Lidenb97bf3f2006-01-02 19:04:38 +010056
Richard Alpe0655f6a2014-11-20 10:29:07 +010057static const struct nla_policy
58tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
59 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
60 [TIPC_NLA_BEARER_NAME] = {
61 .type = NLA_STRING,
62 .len = TIPC_MAX_BEARER_NAME
63 },
64 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
65 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
66};
67
Richard Alpe46f15c62014-11-20 10:29:15 +010068static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
69 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
70 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
71 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
72};
73
Jon Paul Maloyb1c29f62015-05-14 10:46:11 -040074static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr);
Allan Stephens3a777ff2011-04-21 13:58:26 -050075
Per Lidenb97bf3f2006-01-02 19:04:38 +010076/**
Allan Stephens5c216e12011-10-18 11:34:29 -040077 * tipc_media_find - locates specified media object by name
Per Lidenb97bf3f2006-01-02 19:04:38 +010078 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050079struct tipc_media *tipc_media_find(const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +010080{
Per Lidenb97bf3f2006-01-02 19:04:38 +010081 u32 i;
82
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080083 for (i = 0; media_info_array[i] != NULL; i++) {
84 if (!strcmp(media_info_array[i]->name, name))
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080085 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +010086 }
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080087 return media_info_array[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +010088}
89
90/**
Allan Stephensc79be452011-10-06 16:40:55 -040091 * media_find_id - locates specified media object by type identifier
92 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050093static struct tipc_media *media_find_id(u8 type)
Allan Stephensc79be452011-10-06 16:40:55 -040094{
95 u32 i;
96
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080097 for (i = 0; media_info_array[i] != NULL; i++) {
98 if (media_info_array[i]->type_id == type)
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080099 break;
Allan Stephensc79be452011-10-06 16:40:55 -0400100 }
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -0800101 return media_info_array[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +0100102}
103
104/**
Per Liden4323add2006-01-18 00:38:21 +0100105 * tipc_media_addr_printf - record media address in print buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100106 */
Erik Hugnedc1aed32012-06-29 00:50:23 -0400107void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100108{
Allan Stephensc61b6662011-10-07 11:31:49 -0400109 char addr_str[MAX_ADDR_STR];
Paul Gortmaker358a0d12011-12-29 20:19:42 -0500110 struct tipc_media *m_ptr;
Erik Hugnedc1aed32012-06-29 00:50:23 -0400111 int ret;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100112
Allan Stephens3d749a62011-10-07 15:19:11 -0400113 m_ptr = media_find_id(a->media_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100114
Allan Stephensc61b6662011-10-07 11:31:49 -0400115 if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str)))
Richard Alpe941787b2015-02-09 09:50:19 +0100116 ret = scnprintf(buf, len, "%s(%s)", m_ptr->name, addr_str);
Allan Stephensc61b6662011-10-07 11:31:49 -0400117 else {
Allan Stephensc61b6662011-10-07 11:31:49 -0400118 u32 i;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100119
Richard Alpe941787b2015-02-09 09:50:19 +0100120 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
Allan Stephens3d749a62011-10-07 15:19:11 -0400121 for (i = 0; i < sizeof(a->value); i++)
Richard Alpe941787b2015-02-09 09:50:19 +0100122 ret += scnprintf(buf - ret, len + ret,
Erik Hugnedc1aed32012-06-29 00:50:23 -0400123 "-%02x", a->value[i]);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100124 }
125}
126
127/**
Per Lidenb97bf3f2006-01-02 19:04:38 +0100128 * bearer_name_validate - validate & (optionally) deconstruct bearer name
Ben Hutchings2c530402012-07-10 10:55:09 +0000129 * @name: ptr to bearer name string
130 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900131 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100132 * Returns 1 if bearer name is valid, otherwise 0.
133 */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900134static int bearer_name_validate(const char *name,
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500135 struct tipc_bearer_names *name_parts)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100136{
137 char name_copy[TIPC_MAX_BEARER_NAME];
138 char *media_name;
139 char *if_name;
140 u32 media_len;
141 u32 if_len;
142
143 /* copy bearer name & ensure length is OK */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100144 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
145 /* need above in case non-Posix strncpy() doesn't pad with nulls */
146 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
147 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
148 return 0;
149
150 /* ensure all component parts of bearer name are present */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100151 media_name = name_copy;
Allan Stephens2db99832010-12-31 18:59:33 +0000152 if_name = strchr(media_name, ':');
153 if (if_name == NULL)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100154 return 0;
155 *(if_name++) = 0;
156 media_len = if_name - media_name;
157 if_len = strlen(if_name) + 1;
158
159 /* validate component parts of bearer name */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900160 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
Ying Xuefc073932012-08-16 12:09:08 +0000161 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100162 return 0;
163
164 /* return bearer name components, if necessary */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100165 if (name_parts) {
166 strcpy(name_parts->media_name, media_name);
167 strcpy(name_parts->if_name, if_name);
168 }
169 return 1;
170}
171
172/**
Allan Stephens5c216e12011-10-18 11:34:29 -0400173 * tipc_bearer_find - locates bearer object with matching bearer name
Per Lidenb97bf3f2006-01-02 19:04:38 +0100174 */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800175struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100176{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800177 struct tipc_net *tn = net_generic(net, tipc_net_id);
Allan Stephens2d627b92011-01-07 13:00:11 -0500178 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100179 u32 i;
180
Ying Xue3874ccb2014-03-27 12:54:33 +0800181 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800182 b_ptr = rtnl_dereference(tn->bearer_list[i]);
Ying Xuef47de122014-03-27 12:54:34 +0800183 if (b_ptr && (!strcmp(b_ptr->name, name)))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100184 return b_ptr;
185 }
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800186 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100187}
188
Ying Xue7f9f95d2015-01-09 15:27:06 +0800189void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100190{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800191 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800192 struct tipc_bearer *b_ptr;
193
194 rcu_read_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800195 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
Jon Paul Maloyb06b2812015-10-22 08:51:42 -0400196 if (b_ptr)
Ying Xue7a2f7d12014-04-21 10:55:46 +0800197 tipc_disc_add_dest(b_ptr->link_req);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800198 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100199}
200
Ying Xue7f9f95d2015-01-09 15:27:06 +0800201void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100202{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800203 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800204 struct tipc_bearer *b_ptr;
205
206 rcu_read_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800207 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
Jon Paul Maloyb06b2812015-10-22 08:51:42 -0400208 if (b_ptr)
Ying Xue7a2f7d12014-04-21 10:55:46 +0800209 tipc_disc_remove_dest(b_ptr->link_req);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800210 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100211}
212
Allan Stephensb274f4a2010-05-11 14:30:16 +0000213/**
Per Lidenb97bf3f2006-01-02 19:04:38 +0100214 * tipc_enable_bearer - enable bearer with the given name
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900215 */
Richard Alpe9ab15462015-02-09 09:50:05 +0100216static int tipc_enable_bearer(struct net *net, const char *name,
Erik Hugned0f91932015-03-05 10:23:49 +0100217 u32 disc_domain, u32 priority,
218 struct nlattr *attr[])
Per Lidenb97bf3f2006-01-02 19:04:38 +0100219{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800220 struct tipc_net *tn = net_generic(net, tipc_net_id);
Allan Stephens2d627b92011-01-07 13:00:11 -0500221 struct tipc_bearer *b_ptr;
Paul Gortmaker358a0d12011-12-29 20:19:42 -0500222 struct tipc_media *m_ptr;
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500223 struct tipc_bearer_names b_names;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100224 char addr_string[16];
225 u32 bearer_id;
226 u32 with_this_prio;
227 u32 i;
228 int res = -EINVAL;
229
Ying Xue34747532015-01-09 15:27:10 +0800230 if (!tn->own_addr) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400231 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
232 name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100233 return -ENOPROTOOPT;
Allan Stephensa10bd922006-06-25 23:52:17 -0700234 }
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500235 if (!bearer_name_validate(name, &b_names)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400236 pr_warn("Bearer <%s> rejected, illegal name\n", name);
Per Liden16cb4b32006-01-13 22:22:22 +0100237 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700238 }
Allan Stephens66e019a2011-04-20 16:24:07 -0500239 if (tipc_addr_domain_valid(disc_domain) &&
Ying Xue34747532015-01-09 15:27:10 +0800240 (disc_domain != tn->own_addr)) {
241 if (tipc_in_scope(disc_domain, tn->own_addr)) {
242 disc_domain = tn->own_addr & TIPC_CLUSTER_MASK;
Allan Stephens66e019a2011-04-20 16:24:07 -0500243 res = 0; /* accept any node in own cluster */
Ying Xue34747532015-01-09 15:27:10 +0800244 } else if (in_own_cluster_exact(net, disc_domain))
Allan Stephens66e019a2011-04-20 16:24:07 -0500245 res = 0; /* accept specified node in own cluster */
246 }
247 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400248 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
249 name);
Allan Stephensa10bd922006-06-25 23:52:17 -0700250 return -EINVAL;
251 }
Allan Stephens9efde4a2011-11-03 13:15:10 -0400252 if ((priority > TIPC_MAX_LINK_PRI) &&
Allan Stephensa10bd922006-06-25 23:52:17 -0700253 (priority != TIPC_MEDIA_LINK_PRI)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400254 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100255 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700256 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100257
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500258 m_ptr = tipc_media_find(b_names.media_name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100259 if (!m_ptr) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400260 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
261 name, b_names.media_name);
Ying Xue7216cd92014-04-21 10:55:48 +0800262 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100263 }
Per Liden16cb4b32006-01-13 22:22:22 +0100264
265 if (priority == TIPC_MEDIA_LINK_PRI)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100266 priority = m_ptr->priority;
267
268restart:
269 bearer_id = MAX_BEARERS;
270 with_this_prio = 1;
271 for (i = MAX_BEARERS; i-- != 0; ) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800272 b_ptr = rtnl_dereference(tn->bearer_list[i]);
Ying Xuef47de122014-03-27 12:54:34 +0800273 if (!b_ptr) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100274 bearer_id = i;
275 continue;
276 }
Ying Xue3874ccb2014-03-27 12:54:33 +0800277 if (!strcmp(name, b_ptr->name)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400278 pr_warn("Bearer <%s> rejected, already enabled\n",
279 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800280 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100281 }
Ying Xue3874ccb2014-03-27 12:54:33 +0800282 if ((b_ptr->priority == priority) &&
Per Lidenb97bf3f2006-01-02 19:04:38 +0100283 (++with_this_prio > 2)) {
284 if (priority-- == 0) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400285 pr_warn("Bearer <%s> rejected, duplicate priority\n",
286 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800287 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100288 }
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400289 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
290 name, priority + 1, priority);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100291 goto restart;
292 }
293 }
294 if (bearer_id >= MAX_BEARERS) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400295 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
296 name, MAX_BEARERS);
Ying Xue7216cd92014-04-21 10:55:48 +0800297 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100298 }
299
Ying Xue3874ccb2014-03-27 12:54:33 +0800300 b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC);
Ying Xue7216cd92014-04-21 10:55:48 +0800301 if (!b_ptr)
302 return -ENOMEM;
303
Allan Stephens2d627b92011-01-07 13:00:11 -0500304 strcpy(b_ptr->name, name);
Ying Xuee4d050c2013-12-10 20:45:43 -0800305 b_ptr->media = m_ptr;
Erik Hugned0f91932015-03-05 10:23:49 +0100306 res = m_ptr->enable_media(net, b_ptr, attr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100307 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400308 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
309 name, -res);
Ying Xue7216cd92014-04-21 10:55:48 +0800310 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100311 }
312
313 b_ptr->identity = bearer_id;
Allan Stephens5c216e12011-10-18 11:34:29 -0400314 b_ptr->tolerance = m_ptr->tolerance;
315 b_ptr->window = m_ptr->window;
Erik Hugnea21a5842014-03-28 10:32:08 +0100316 b_ptr->domain = disc_domain;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100317 b_ptr->net_plane = bearer_id + 'A';
Per Lidenb97bf3f2006-01-02 19:04:38 +0100318 b_ptr->priority = priority;
Allan Stephens3a777ff2011-04-21 13:58:26 -0500319
Ying Xuec93d3ba2015-01-09 15:27:04 +0800320 res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500321 if (res) {
Jon Paul Maloyb1c29f62015-05-14 10:46:11 -0400322 bearer_disable(net, b_ptr);
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400323 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
324 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800325 return -EINVAL;
Allan Stephens3a777ff2011-04-21 13:58:26 -0500326 }
Ying Xue3874ccb2014-03-27 12:54:33 +0800327
Ying Xue7f9f95d2015-01-09 15:27:06 +0800328 rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr);
Ying Xue3874ccb2014-03-27 12:54:33 +0800329
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400330 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
331 name,
332 tipc_addr_string_fill(addr_string, disc_domain), priority);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100333 return res;
334}
335
336/**
Erik Hugne512137e2013-12-06 10:08:00 -0500337 * tipc_reset_bearer - Reset all links established over this bearer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100338 */
Ying Xuec93d3ba2015-01-09 15:27:04 +0800339static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100340{
Erik Hugne512137e2013-12-06 10:08:00 -0500341 pr_info("Resetting bearer <%s>\n", b_ptr->name);
Jon Paul Maloy6144a992015-07-30 18:24:16 -0400342 tipc_node_delete_links(net, b_ptr->identity);
Ying Xuec93d3ba2015-01-09 15:27:04 +0800343 tipc_disc_reset(net, b_ptr);
Allan Stephens0e35fd52008-07-14 22:44:01 -0700344 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100345}
346
347/**
Paul Gortmaker617d3c72012-04-30 15:29:02 -0400348 * bearer_disable
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900349 *
Ying Xue7216cd92014-04-21 10:55:48 +0800350 * Note: This routine assumes caller holds RTNL lock.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100351 */
Jon Paul Maloyb1c29f62015-05-14 10:46:11 -0400352static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100353{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800354 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue3874ccb2014-03-27 12:54:33 +0800355 u32 i;
356
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400357 pr_info("Disabling bearer <%s>\n", b_ptr->name);
Ying Xue4babbaa2013-10-18 07:23:17 +0200358 b_ptr->media->disable_media(b_ptr);
Ying Xuea8304522014-02-13 17:29:17 -0500359
Jon Paul Maloy6144a992015-07-30 18:24:16 -0400360 tipc_node_delete_links(net, b_ptr->identity);
Jon Paul Maloy282b3a02015-10-15 14:52:45 -0400361 RCU_INIT_POINTER(b_ptr->media_ptr, NULL);
Ying Xuea8304522014-02-13 17:29:17 -0500362 if (b_ptr->link_req)
363 tipc_disc_delete(b_ptr->link_req);
Ying Xue3874ccb2014-03-27 12:54:33 +0800364
365 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800366 if (b_ptr == rtnl_dereference(tn->bearer_list[i])) {
367 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
Ying Xue3874ccb2014-03-27 12:54:33 +0800368 break;
369 }
370 }
Ying Xuef8322df2014-04-21 10:55:45 +0800371 kfree_rcu(b_ptr, rcu);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100372}
373
Erik Hugned0f91932015-03-05 10:23:49 +0100374int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
375 struct nlattr *attr[])
Ying Xuee4d050c2013-12-10 20:45:43 -0800376{
377 struct net_device *dev;
378 char *driver_name = strchr((const char *)b->name, ':') + 1;
379
380 /* Find device with specified name */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800381 dev = dev_get_by_name(net, driver_name);
Ying Xuee4d050c2013-12-10 20:45:43 -0800382 if (!dev)
383 return -ENODEV;
384
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400385 /* Associate TIPC bearer with L2 bearer */
Ying Xue2231c5a2014-04-21 10:55:47 +0800386 rcu_assign_pointer(b->media_ptr, dev);
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400387 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
Ying Xuee4d050c2013-12-10 20:45:43 -0800388 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
389 b->bcast_addr.media_id = b->media->type_id;
390 b->bcast_addr.broadcast = 1;
391 b->mtu = dev->mtu;
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400392 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
Ying Xuee4d050c2013-12-10 20:45:43 -0800393 rcu_assign_pointer(dev->tipc_ptr, b);
394 return 0;
395}
396
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400397/* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
Ying Xuee4d050c2013-12-10 20:45:43 -0800398 *
Jon Paul Maloy282b3a02015-10-15 14:52:45 -0400399 * Mark L2 bearer as inactive so that incoming buffers are thrown away
Ying Xuee4d050c2013-12-10 20:45:43 -0800400 */
401void tipc_disable_l2_media(struct tipc_bearer *b)
402{
Ying Xue2231c5a2014-04-21 10:55:47 +0800403 struct net_device *dev;
404
405 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
Ying Xuee4d050c2013-12-10 20:45:43 -0800406 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
Ying Xuef1c8d8c2014-04-21 10:55:49 +0800407 synchronize_net();
Ying Xuee4d050c2013-12-10 20:45:43 -0800408 dev_put(dev);
409}
410
411/**
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400412 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
Ying Xuee4d050c2013-12-10 20:45:43 -0800413 * @buf: the packet to be sent
stephen hemminger963a18552014-01-12 12:48:00 -0800414 * @b_ptr: the bearer through which the packet is to be sent
Ying Xuee4d050c2013-12-10 20:45:43 -0800415 * @dest: peer destination address
416 */
Jon Paul Maloy7214bcf2015-10-22 08:51:45 -0400417int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
Ying Xue1da46562015-01-09 15:27:07 +0800418 struct tipc_bearer *b, struct tipc_media_addr *dest)
Ying Xuee4d050c2013-12-10 20:45:43 -0800419{
Ying Xue2231c5a2014-04-21 10:55:47 +0800420 struct net_device *dev;
Ying Xuee4d050c2013-12-10 20:45:43 -0800421 int delta;
Ying Xue2231c5a2014-04-21 10:55:47 +0800422
423 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
424 if (!dev)
425 return 0;
Ying Xuee4d050c2013-12-10 20:45:43 -0800426
Jon Paul Maloy7214bcf2015-10-22 08:51:45 -0400427 delta = dev->hard_header_len - skb_headroom(skb);
Ying Xuee4d050c2013-12-10 20:45:43 -0800428 if ((delta > 0) &&
Jon Paul Maloy7214bcf2015-10-22 08:51:45 -0400429 pskb_expand_head(skb, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
430 kfree_skb(skb);
Ying Xuee4d050c2013-12-10 20:45:43 -0800431 return 0;
432 }
433
Jon Paul Maloy7214bcf2015-10-22 08:51:45 -0400434 skb_reset_network_header(skb);
435 skb->dev = dev;
436 skb->protocol = htons(ETH_P_TIPC);
437 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
438 dev->dev_addr, skb->len);
439 dev_queue_xmit(skb);
Ying Xuee4d050c2013-12-10 20:45:43 -0800440 return 0;
441}
442
Jon Paul Maloy959e1782015-10-22 08:51:43 -0400443int tipc_bearer_mtu(struct net *net, u32 bearer_id)
444{
445 int mtu = 0;
446 struct tipc_bearer *b;
447
448 rcu_read_lock();
449 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
450 if (b)
451 mtu = b->mtu;
452 rcu_read_unlock();
453 return mtu;
454}
455
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400456/* tipc_bearer_xmit_skb - sends buffer to destination over bearer
457 */
458void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
459 struct sk_buff *skb,
460 struct tipc_media_addr *dest)
461{
462 struct tipc_net *tn = tipc_net(net);
463 struct tipc_bearer *b;
464
465 rcu_read_lock();
466 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
467 if (likely(b))
468 b->media->send_msg(net, skb, b, dest);
469 rcu_read_unlock();
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400470}
471
Jon Paul Maloyaf9b0282015-07-16 16:54:24 -0400472/* tipc_bearer_xmit() -send buffer to destination over bearer
473 */
474void tipc_bearer_xmit(struct net *net, u32 bearer_id,
475 struct sk_buff_head *xmitq,
476 struct tipc_media_addr *dst)
477{
478 struct tipc_net *tn = net_generic(net, tipc_net_id);
479 struct tipc_bearer *b;
480 struct sk_buff *skb, *tmp;
481
482 if (skb_queue_empty(xmitq))
483 return;
484
485 rcu_read_lock();
486 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
487 if (likely(b)) {
488 skb_queue_walk_safe(xmitq, skb, tmp) {
489 __skb_dequeue(xmitq);
490 b->media->send_msg(net, skb, b, dst);
Jon Paul Maloyaf9b0282015-07-16 16:54:24 -0400491 }
492 }
493 rcu_read_unlock();
494}
495
Jon Paul Maloyb06b2812015-10-22 08:51:42 -0400496/* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
497 */
498void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
499 struct sk_buff_head *xmitq)
500{
501 struct tipc_net *tn = tipc_net(net);
502 int net_id = tn->net_id;
503 struct tipc_bearer *b;
504 struct sk_buff *skb, *tmp;
505 struct tipc_msg *hdr;
506
507 rcu_read_lock();
508 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
509 if (likely(b)) {
510 skb_queue_walk_safe(xmitq, skb, tmp) {
511 hdr = buf_msg(skb);
512 msg_set_non_seq(hdr, 1);
513 msg_set_mc_netid(hdr, net_id);
514 __skb_dequeue(xmitq);
515 b->media->send_msg(net, skb, b, &b->bcast_addr);
Jon Paul Maloyb06b2812015-10-22 08:51:42 -0400516 }
517 }
518 rcu_read_unlock();
519}
520
Ying Xue6e967ad2013-12-10 20:45:42 -0800521/**
522 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
523 * @buf: the received packet
524 * @dev: the net device that the packet was received on
525 * @pt: the packet_type structure which was used to register this handler
526 * @orig_dev: the original receive net device in case the device is a bond
527 *
528 * Accept only packets explicitly sent to this node, or broadcast packets;
529 * ignores packets sent using interface multicast, and traffic sent to other
530 * nodes (which can happen if interface is running in promiscuous mode).
531 */
532static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
533 struct packet_type *pt, struct net_device *orig_dev)
534{
535 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100536
Ying Xue6e967ad2013-12-10 20:45:42 -0800537 rcu_read_lock();
Ying Xueca07fb02014-04-21 10:55:43 +0800538 b_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
Ying Xue6e967ad2013-12-10 20:45:42 -0800539 if (likely(b_ptr)) {
540 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
541 buf->next = NULL;
Ying Xuec93d3ba2015-01-09 15:27:04 +0800542 tipc_rcv(dev_net(dev), buf, b_ptr);
Ying Xue6e967ad2013-12-10 20:45:42 -0800543 rcu_read_unlock();
544 return NET_RX_SUCCESS;
545 }
546 }
547 rcu_read_unlock();
548
549 kfree_skb(buf);
550 return NET_RX_DROP;
551}
552
553/**
554 * tipc_l2_device_event - handle device events from network device
555 * @nb: the context of the notification
556 * @evt: the type of event
557 * @ptr: the net device that the event was on
558 *
559 * This function is called by the Ethernet driver in case of link
560 * change event.
561 */
562static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
563 void *ptr)
564{
Ying Xue6e967ad2013-12-10 20:45:42 -0800565 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Ying Xuec93d3ba2015-01-09 15:27:04 +0800566 struct net *net = dev_net(dev);
567 struct tipc_bearer *b_ptr;
Ying Xue6e967ad2013-12-10 20:45:42 -0800568
Ying Xueca07fb02014-04-21 10:55:43 +0800569 b_ptr = rtnl_dereference(dev->tipc_ptr);
570 if (!b_ptr)
Ying Xue6e967ad2013-12-10 20:45:42 -0800571 return NOTIFY_DONE;
Ying Xue6e967ad2013-12-10 20:45:42 -0800572
573 b_ptr->mtu = dev->mtu;
574
575 switch (evt) {
576 case NETDEV_CHANGE:
577 if (netif_carrier_ok(dev))
578 break;
Jon Paul Maloy282b3a02015-10-15 14:52:45 -0400579 case NETDEV_GOING_DOWN:
Ying Xue6e967ad2013-12-10 20:45:42 -0800580 case NETDEV_CHANGEMTU:
Ying Xuec93d3ba2015-01-09 15:27:04 +0800581 tipc_reset_bearer(net, b_ptr);
Erik Hugnea21a5842014-03-28 10:32:08 +0100582 break;
Ying Xue6e967ad2013-12-10 20:45:42 -0800583 case NETDEV_CHANGEADDR:
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400584 b_ptr->media->raw2addr(b_ptr, &b_ptr->addr,
Erik Hugnea21a5842014-03-28 10:32:08 +0100585 (char *)dev->dev_addr);
Ying Xuec93d3ba2015-01-09 15:27:04 +0800586 tipc_reset_bearer(net, b_ptr);
Ying Xue6e967ad2013-12-10 20:45:42 -0800587 break;
588 case NETDEV_UNREGISTER:
589 case NETDEV_CHANGENAME:
Jon Paul Maloyb1c29f62015-05-14 10:46:11 -0400590 bearer_disable(dev_net(dev), b_ptr);
Ying Xue6e967ad2013-12-10 20:45:42 -0800591 break;
592 }
Ying Xue6e967ad2013-12-10 20:45:42 -0800593 return NOTIFY_OK;
594}
595
596static struct packet_type tipc_packet_type __read_mostly = {
Joe Perches184593c2014-03-12 10:04:20 -0700597 .type = htons(ETH_P_TIPC),
Ying Xue6e967ad2013-12-10 20:45:42 -0800598 .func = tipc_l2_rcv_msg,
599};
600
601static struct notifier_block notifier = {
602 .notifier_call = tipc_l2_device_event,
603 .priority = 0,
604};
605
606int tipc_bearer_setup(void)
607{
Ying Xue970122f2014-02-20 11:32:50 +0800608 int err;
609
610 err = register_netdevice_notifier(&notifier);
611 if (err)
612 return err;
Ying Xue6e967ad2013-12-10 20:45:42 -0800613 dev_add_pack(&tipc_packet_type);
Ying Xue970122f2014-02-20 11:32:50 +0800614 return 0;
Ying Xue6e967ad2013-12-10 20:45:42 -0800615}
616
617void tipc_bearer_cleanup(void)
618{
619 unregister_netdevice_notifier(&notifier);
620 dev_remove_pack(&tipc_packet_type);
621}
Per Lidenb97bf3f2006-01-02 19:04:38 +0100622
Ying Xuef2f98002015-01-09 15:27:05 +0800623void tipc_bearer_stop(struct net *net)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100624{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800625 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue3874ccb2014-03-27 12:54:33 +0800626 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100627 u32 i;
628
Per Lidenb97bf3f2006-01-02 19:04:38 +0100629 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800630 b_ptr = rtnl_dereference(tn->bearer_list[i]);
Ying Xuef47de122014-03-27 12:54:34 +0800631 if (b_ptr) {
Jon Paul Maloyb1c29f62015-05-14 10:46:11 -0400632 bearer_disable(net, b_ptr);
Ying Xue7f9f95d2015-01-09 15:27:06 +0800633 tn->bearer_list[i] = NULL;
Ying Xue3874ccb2014-03-27 12:54:33 +0800634 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100635 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100636}
Richard Alpe0655f6a2014-11-20 10:29:07 +0100637
Richard Alpe35b9dd72014-11-20 10:29:08 +0100638/* Caller should hold rtnl_lock to protect the bearer */
Richard Alped8182802014-11-24 11:10:29 +0100639static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200640 struct tipc_bearer *bearer, int nlflags)
Richard Alpe35b9dd72014-11-20 10:29:08 +0100641{
642 void *hdr;
643 struct nlattr *attrs;
644 struct nlattr *prop;
645
Richard Alpebfb3e5d2015-02-09 09:50:03 +0100646 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200647 nlflags, TIPC_NL_BEARER_GET);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100648 if (!hdr)
649 return -EMSGSIZE;
650
651 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
652 if (!attrs)
653 goto msg_full;
654
655 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
656 goto attr_msg_full;
657
658 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
659 if (!prop)
660 goto prop_msg_full;
661 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
662 goto prop_msg_full;
663 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
664 goto prop_msg_full;
665 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
666 goto prop_msg_full;
667
668 nla_nest_end(msg->skb, prop);
669 nla_nest_end(msg->skb, attrs);
670 genlmsg_end(msg->skb, hdr);
671
672 return 0;
673
674prop_msg_full:
675 nla_nest_cancel(msg->skb, prop);
676attr_msg_full:
677 nla_nest_cancel(msg->skb, attrs);
678msg_full:
679 genlmsg_cancel(msg->skb, hdr);
680
681 return -EMSGSIZE;
682}
683
684int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
685{
686 int err;
687 int i = cb->args[0];
688 struct tipc_bearer *bearer;
689 struct tipc_nl_msg msg;
Ying Xue7f9f95d2015-01-09 15:27:06 +0800690 struct net *net = sock_net(skb->sk);
691 struct tipc_net *tn = net_generic(net, tipc_net_id);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100692
693 if (i == MAX_BEARERS)
694 return 0;
695
696 msg.skb = skb;
697 msg.portid = NETLINK_CB(cb->skb).portid;
698 msg.seq = cb->nlh->nlmsg_seq;
699
700 rtnl_lock();
701 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800702 bearer = rtnl_dereference(tn->bearer_list[i]);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100703 if (!bearer)
704 continue;
705
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200706 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100707 if (err)
708 break;
709 }
710 rtnl_unlock();
711
712 cb->args[0] = i;
713 return skb->len;
714}
715
716int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
717{
718 int err;
719 char *name;
720 struct sk_buff *rep;
721 struct tipc_bearer *bearer;
722 struct tipc_nl_msg msg;
723 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Ying Xue7f9f95d2015-01-09 15:27:06 +0800724 struct net *net = genl_info_net(info);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100725
726 if (!info->attrs[TIPC_NLA_BEARER])
727 return -EINVAL;
728
729 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
730 info->attrs[TIPC_NLA_BEARER],
731 tipc_nl_bearer_policy);
732 if (err)
733 return err;
734
735 if (!attrs[TIPC_NLA_BEARER_NAME])
736 return -EINVAL;
737 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
738
739 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
740 if (!rep)
741 return -ENOMEM;
742
743 msg.skb = rep;
744 msg.portid = info->snd_portid;
745 msg.seq = info->snd_seq;
746
747 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800748 bearer = tipc_bearer_find(net, name);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100749 if (!bearer) {
750 err = -EINVAL;
751 goto err_out;
752 }
753
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200754 err = __tipc_nl_add_bearer(&msg, bearer, 0);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100755 if (err)
756 goto err_out;
757 rtnl_unlock();
758
759 return genlmsg_reply(rep, info);
760err_out:
761 rtnl_unlock();
762 nlmsg_free(rep);
763
764 return err;
765}
766
Richard Alpe0655f6a2014-11-20 10:29:07 +0100767int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
768{
769 int err;
770 char *name;
771 struct tipc_bearer *bearer;
772 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Richard Alpe9ab15462015-02-09 09:50:05 +0100773 struct net *net = sock_net(skb->sk);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100774
775 if (!info->attrs[TIPC_NLA_BEARER])
776 return -EINVAL;
777
778 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
779 info->attrs[TIPC_NLA_BEARER],
780 tipc_nl_bearer_policy);
781 if (err)
782 return err;
783
784 if (!attrs[TIPC_NLA_BEARER_NAME])
785 return -EINVAL;
786
787 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
788
789 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800790 bearer = tipc_bearer_find(net, name);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100791 if (!bearer) {
792 rtnl_unlock();
793 return -EINVAL;
794 }
795
Jon Paul Maloyb1c29f62015-05-14 10:46:11 -0400796 bearer_disable(net, bearer);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100797 rtnl_unlock();
798
799 return 0;
800}
801
802int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
803{
804 int err;
805 char *bearer;
806 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Richard Alpe9ab15462015-02-09 09:50:05 +0100807 struct net *net = sock_net(skb->sk);
808 struct tipc_net *tn = net_generic(net, tipc_net_id);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100809 u32 domain;
810 u32 prio;
811
812 prio = TIPC_MEDIA_LINK_PRI;
Ying Xue34747532015-01-09 15:27:10 +0800813 domain = tn->own_addr & TIPC_CLUSTER_MASK;
Richard Alpe0655f6a2014-11-20 10:29:07 +0100814
815 if (!info->attrs[TIPC_NLA_BEARER])
816 return -EINVAL;
817
818 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
819 info->attrs[TIPC_NLA_BEARER],
820 tipc_nl_bearer_policy);
821 if (err)
822 return err;
823
824 if (!attrs[TIPC_NLA_BEARER_NAME])
825 return -EINVAL;
826
827 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
828
829 if (attrs[TIPC_NLA_BEARER_DOMAIN])
830 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
831
832 if (attrs[TIPC_NLA_BEARER_PROP]) {
833 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
834
835 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
836 props);
837 if (err)
838 return err;
839
840 if (props[TIPC_NLA_PROP_PRIO])
841 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
842 }
843
844 rtnl_lock();
Erik Hugned0f91932015-03-05 10:23:49 +0100845 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100846 if (err) {
847 rtnl_unlock();
848 return err;
849 }
850 rtnl_unlock();
851
852 return 0;
853}
Richard Alpe315c00b2014-11-20 10:29:09 +0100854
855int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
856{
857 int err;
858 char *name;
859 struct tipc_bearer *b;
860 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Richard Alpec3d6fb82015-05-06 13:58:54 +0200861 struct net *net = sock_net(skb->sk);
Richard Alpe315c00b2014-11-20 10:29:09 +0100862
863 if (!info->attrs[TIPC_NLA_BEARER])
864 return -EINVAL;
865
866 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
867 info->attrs[TIPC_NLA_BEARER],
868 tipc_nl_bearer_policy);
869 if (err)
870 return err;
871
872 if (!attrs[TIPC_NLA_BEARER_NAME])
873 return -EINVAL;
874 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
875
876 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800877 b = tipc_bearer_find(net, name);
Richard Alpe315c00b2014-11-20 10:29:09 +0100878 if (!b) {
879 rtnl_unlock();
880 return -EINVAL;
881 }
882
883 if (attrs[TIPC_NLA_BEARER_PROP]) {
884 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
885
886 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
887 props);
888 if (err) {
889 rtnl_unlock();
890 return err;
891 }
892
893 if (props[TIPC_NLA_PROP_TOL])
894 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
895 if (props[TIPC_NLA_PROP_PRIO])
896 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
897 if (props[TIPC_NLA_PROP_WIN])
898 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
899 }
900 rtnl_unlock();
901
902 return 0;
903}
Richard Alpe46f15c62014-11-20 10:29:15 +0100904
Richard Alped8182802014-11-24 11:10:29 +0100905static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200906 struct tipc_media *media, int nlflags)
Richard Alpe46f15c62014-11-20 10:29:15 +0100907{
908 void *hdr;
909 struct nlattr *attrs;
910 struct nlattr *prop;
911
Richard Alpebfb3e5d2015-02-09 09:50:03 +0100912 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200913 nlflags, TIPC_NL_MEDIA_GET);
Richard Alpe46f15c62014-11-20 10:29:15 +0100914 if (!hdr)
915 return -EMSGSIZE;
916
917 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
918 if (!attrs)
919 goto msg_full;
920
921 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
922 goto attr_msg_full;
923
924 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
925 if (!prop)
926 goto prop_msg_full;
927 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
928 goto prop_msg_full;
929 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
930 goto prop_msg_full;
931 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
932 goto prop_msg_full;
933
934 nla_nest_end(msg->skb, prop);
935 nla_nest_end(msg->skb, attrs);
936 genlmsg_end(msg->skb, hdr);
937
938 return 0;
939
940prop_msg_full:
941 nla_nest_cancel(msg->skb, prop);
942attr_msg_full:
943 nla_nest_cancel(msg->skb, attrs);
944msg_full:
945 genlmsg_cancel(msg->skb, hdr);
946
947 return -EMSGSIZE;
948}
949
950int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
951{
952 int err;
953 int i = cb->args[0];
954 struct tipc_nl_msg msg;
955
956 if (i == MAX_MEDIA)
957 return 0;
958
959 msg.skb = skb;
960 msg.portid = NETLINK_CB(cb->skb).portid;
961 msg.seq = cb->nlh->nlmsg_seq;
962
963 rtnl_lock();
964 for (; media_info_array[i] != NULL; i++) {
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200965 err = __tipc_nl_add_media(&msg, media_info_array[i],
966 NLM_F_MULTI);
Richard Alpe46f15c62014-11-20 10:29:15 +0100967 if (err)
968 break;
969 }
970 rtnl_unlock();
971
972 cb->args[0] = i;
973 return skb->len;
974}
975
976int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
977{
978 int err;
979 char *name;
980 struct tipc_nl_msg msg;
981 struct tipc_media *media;
982 struct sk_buff *rep;
983 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
984
985 if (!info->attrs[TIPC_NLA_MEDIA])
986 return -EINVAL;
987
988 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
989 info->attrs[TIPC_NLA_MEDIA],
990 tipc_nl_media_policy);
991 if (err)
992 return err;
993
994 if (!attrs[TIPC_NLA_MEDIA_NAME])
995 return -EINVAL;
996 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
997
998 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
999 if (!rep)
1000 return -ENOMEM;
1001
1002 msg.skb = rep;
1003 msg.portid = info->snd_portid;
1004 msg.seq = info->snd_seq;
1005
1006 rtnl_lock();
1007 media = tipc_media_find(name);
1008 if (!media) {
1009 err = -EINVAL;
1010 goto err_out;
1011 }
1012
Nicolas Dichtelf2f67392015-04-28 18:33:50 +02001013 err = __tipc_nl_add_media(&msg, media, 0);
Richard Alpe46f15c62014-11-20 10:29:15 +01001014 if (err)
1015 goto err_out;
1016 rtnl_unlock();
1017
1018 return genlmsg_reply(rep, info);
1019err_out:
1020 rtnl_unlock();
1021 nlmsg_free(rep);
1022
1023 return err;
1024}
Richard Alpe1e554172014-11-20 10:29:16 +01001025
1026int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1027{
1028 int err;
1029 char *name;
1030 struct tipc_media *m;
1031 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1032
1033 if (!info->attrs[TIPC_NLA_MEDIA])
1034 return -EINVAL;
1035
1036 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1037 info->attrs[TIPC_NLA_MEDIA],
1038 tipc_nl_media_policy);
1039
1040 if (!attrs[TIPC_NLA_MEDIA_NAME])
1041 return -EINVAL;
1042 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1043
1044 rtnl_lock();
1045 m = tipc_media_find(name);
1046 if (!m) {
1047 rtnl_unlock();
1048 return -EINVAL;
1049 }
1050
1051 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1052 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1053
1054 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1055 props);
1056 if (err) {
1057 rtnl_unlock();
1058 return err;
1059 }
1060
1061 if (props[TIPC_NLA_PROP_TOL])
1062 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1063 if (props[TIPC_NLA_PROP_PRIO])
1064 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1065 if (props[TIPC_NLA_PROP_WIN])
1066 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1067 }
1068 rtnl_unlock();
1069
1070 return 0;
1071}