blob: 9a0d6ed5c96ce76c3c3a53cfda95546e278332f5 [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"
39#include "config.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010040#include "bearer.h"
Richard Alpe0655f6a2014-11-20 10:29:07 +010041#include "link.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010042#include "discover.h"
Ying Xue1da46562015-01-09 15:27:07 +080043#include "bcast.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010044
Patrick McHardya29a1942013-04-17 06:18:28 +000045#define MAX_ADDR_STR 60
Per Lidenb97bf3f2006-01-02 19:04:38 +010046
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080047static struct tipc_media * const media_info_array[] = {
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080048 &eth_media_info,
49#ifdef CONFIG_TIPC_MEDIA_IB
50 &ib_media_info,
51#endif
52 NULL
53};
Per Lidenb97bf3f2006-01-02 19:04:38 +010054
Richard Alpe0655f6a2014-11-20 10:29:07 +010055static const struct nla_policy
56tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
57 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
58 [TIPC_NLA_BEARER_NAME] = {
59 .type = NLA_STRING,
60 .len = TIPC_MAX_BEARER_NAME
61 },
62 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
63 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
64};
65
Richard Alpe46f15c62014-11-20 10:29:15 +010066static const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
67 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
68 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
69 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
70};
71
Ying Xuef2f98002015-01-09 15:27:05 +080072static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr,
73 bool shutting_down);
Allan Stephens3a777ff2011-04-21 13:58:26 -050074
Per Lidenb97bf3f2006-01-02 19:04:38 +010075/**
Allan Stephens5c216e12011-10-18 11:34:29 -040076 * tipc_media_find - locates specified media object by name
Per Lidenb97bf3f2006-01-02 19:04:38 +010077 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050078struct tipc_media *tipc_media_find(const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +010079{
Per Lidenb97bf3f2006-01-02 19:04:38 +010080 u32 i;
81
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080082 for (i = 0; media_info_array[i] != NULL; i++) {
83 if (!strcmp(media_info_array[i]->name, name))
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080084 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +010085 }
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080086 return media_info_array[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +010087}
88
89/**
Allan Stephensc79be452011-10-06 16:40:55 -040090 * media_find_id - locates specified media object by type identifier
91 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050092static struct tipc_media *media_find_id(u8 type)
Allan Stephensc79be452011-10-06 16:40:55 -040093{
94 u32 i;
95
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080096 for (i = 0; media_info_array[i] != NULL; i++) {
97 if (media_info_array[i]->type_id == type)
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080098 break;
Allan Stephensc79be452011-10-06 16:40:55 -040099 }
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -0800100 return media_info_array[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +0100101}
102
103/**
Per Liden4323add2006-01-18 00:38:21 +0100104 * tipc_media_addr_printf - record media address in print buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100105 */
Erik Hugnedc1aed32012-06-29 00:50:23 -0400106void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100107{
Allan Stephensc61b6662011-10-07 11:31:49 -0400108 char addr_str[MAX_ADDR_STR];
Paul Gortmaker358a0d12011-12-29 20:19:42 -0500109 struct tipc_media *m_ptr;
Erik Hugnedc1aed32012-06-29 00:50:23 -0400110 int ret;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100111
Allan Stephens3d749a62011-10-07 15:19:11 -0400112 m_ptr = media_find_id(a->media_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100113
Allan Stephensc61b6662011-10-07 11:31:49 -0400114 if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str)))
Erik Hugnedc1aed32012-06-29 00:50:23 -0400115 ret = tipc_snprintf(buf, len, "%s(%s)", m_ptr->name, addr_str);
Allan Stephensc61b6662011-10-07 11:31:49 -0400116 else {
Allan Stephensc61b6662011-10-07 11:31:49 -0400117 u32 i;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100118
Erik Hugnedc1aed32012-06-29 00:50:23 -0400119 ret = tipc_snprintf(buf, len, "UNKNOWN(%u)", a->media_id);
Allan Stephens3d749a62011-10-07 15:19:11 -0400120 for (i = 0; i < sizeof(a->value); i++)
Erik Hugnedc1aed32012-06-29 00:50:23 -0400121 ret += tipc_snprintf(buf - ret, len + ret,
122 "-%02x", a->value[i]);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100123 }
124}
125
126/**
Per Liden4323add2006-01-18 00:38:21 +0100127 * tipc_media_get_names - record names of registered media in buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100128 */
Per Liden4323add2006-01-18 00:38:21 +0100129struct sk_buff *tipc_media_get_names(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100130{
131 struct sk_buff *buf;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100132 int i;
133
Per Liden4323add2006-01-18 00:38:21 +0100134 buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100135 if (!buf)
136 return NULL;
137
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -0800138 for (i = 0; media_info_array[i] != NULL; i++) {
Allan Stephensa31abe82011-10-07 09:25:12 -0400139 tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME,
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -0800140 media_info_array[i]->name,
141 strlen(media_info_array[i]->name) + 1);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100142 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100143 return buf;
144}
145
146/**
147 * bearer_name_validate - validate & (optionally) deconstruct bearer name
Ben Hutchings2c530402012-07-10 10:55:09 +0000148 * @name: ptr to bearer name string
149 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900150 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100151 * Returns 1 if bearer name is valid, otherwise 0.
152 */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900153static int bearer_name_validate(const char *name,
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500154 struct tipc_bearer_names *name_parts)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100155{
156 char name_copy[TIPC_MAX_BEARER_NAME];
157 char *media_name;
158 char *if_name;
159 u32 media_len;
160 u32 if_len;
161
162 /* copy bearer name & ensure length is OK */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100163 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
164 /* need above in case non-Posix strncpy() doesn't pad with nulls */
165 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
166 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
167 return 0;
168
169 /* ensure all component parts of bearer name are present */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100170 media_name = name_copy;
Allan Stephens2db99832010-12-31 18:59:33 +0000171 if_name = strchr(media_name, ':');
172 if (if_name == NULL)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100173 return 0;
174 *(if_name++) = 0;
175 media_len = if_name - media_name;
176 if_len = strlen(if_name) + 1;
177
178 /* validate component parts of bearer name */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900179 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
Ying Xuefc073932012-08-16 12:09:08 +0000180 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100181 return 0;
182
183 /* return bearer name components, if necessary */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100184 if (name_parts) {
185 strcpy(name_parts->media_name, media_name);
186 strcpy(name_parts->if_name, if_name);
187 }
188 return 1;
189}
190
191/**
Allan Stephens5c216e12011-10-18 11:34:29 -0400192 * tipc_bearer_find - locates bearer object with matching bearer name
Per Lidenb97bf3f2006-01-02 19:04:38 +0100193 */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800194struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100195{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800196 struct tipc_net *tn = net_generic(net, tipc_net_id);
Allan Stephens2d627b92011-01-07 13:00:11 -0500197 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100198 u32 i;
199
Ying Xue3874ccb2014-03-27 12:54:33 +0800200 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800201 b_ptr = rtnl_dereference(tn->bearer_list[i]);
Ying Xuef47de122014-03-27 12:54:34 +0800202 if (b_ptr && (!strcmp(b_ptr->name, name)))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100203 return b_ptr;
204 }
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800205 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100206}
207
208/**
Per Liden4323add2006-01-18 00:38:21 +0100209 * tipc_bearer_get_names - record names of bearers in buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100210 */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800211struct sk_buff *tipc_bearer_get_names(struct net *net)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100212{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800213 struct tipc_net *tn = net_generic(net, tipc_net_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100214 struct sk_buff *buf;
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -0800215 struct tipc_bearer *b;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100216 int i, j;
217
Per Liden4323add2006-01-18 00:38:21 +0100218 buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100219 if (!buf)
220 return NULL;
221
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -0800222 for (i = 0; media_info_array[i] != NULL; i++) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100223 for (j = 0; j < MAX_BEARERS; j++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800224 b = rtnl_dereference(tn->bearer_list[j]);
Ying Xue3874ccb2014-03-27 12:54:33 +0800225 if (!b)
226 continue;
Ying Xuef47de122014-03-27 12:54:34 +0800227 if (b->media == media_info_array[i]) {
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900228 tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME,
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -0800229 b->name,
230 strlen(b->name) + 1);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100231 }
232 }
233 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100234 return buf;
235}
236
Ying Xue7f9f95d2015-01-09 15:27:06 +0800237void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100238{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800239 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800240 struct tipc_bearer *b_ptr;
241
242 rcu_read_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800243 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800244 if (b_ptr) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800245 tipc_bcbearer_sort(net, &b_ptr->nodes, dest, true);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800246 tipc_disc_add_dest(b_ptr->link_req);
247 }
248 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100249}
250
Ying Xue7f9f95d2015-01-09 15:27:06 +0800251void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100252{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800253 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800254 struct tipc_bearer *b_ptr;
255
256 rcu_read_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800257 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800258 if (b_ptr) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800259 tipc_bcbearer_sort(net, &b_ptr->nodes, dest, false);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800260 tipc_disc_remove_dest(b_ptr->link_req);
261 }
262 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100263}
264
Allan Stephensb274f4a2010-05-11 14:30:16 +0000265/**
Per Lidenb97bf3f2006-01-02 19:04:38 +0100266 * tipc_enable_bearer - enable bearer with the given name
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900267 */
Ying Xuec93d3ba2015-01-09 15:27:04 +0800268int tipc_enable_bearer(struct net *net, const char *name, u32 disc_domain,
269 u32 priority)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100270{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800271 struct tipc_net *tn = net_generic(net, tipc_net_id);
Allan Stephens2d627b92011-01-07 13:00:11 -0500272 struct tipc_bearer *b_ptr;
Paul Gortmaker358a0d12011-12-29 20:19:42 -0500273 struct tipc_media *m_ptr;
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500274 struct tipc_bearer_names b_names;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100275 char addr_string[16];
276 u32 bearer_id;
277 u32 with_this_prio;
278 u32 i;
279 int res = -EINVAL;
280
Allan Stephensb58343f2011-11-08 13:48:28 -0500281 if (!tipc_own_addr) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400282 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
283 name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100284 return -ENOPROTOOPT;
Allan Stephensa10bd922006-06-25 23:52:17 -0700285 }
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500286 if (!bearer_name_validate(name, &b_names)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400287 pr_warn("Bearer <%s> rejected, illegal name\n", name);
Per Liden16cb4b32006-01-13 22:22:22 +0100288 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700289 }
Allan Stephens66e019a2011-04-20 16:24:07 -0500290 if (tipc_addr_domain_valid(disc_domain) &&
291 (disc_domain != tipc_own_addr)) {
292 if (tipc_in_scope(disc_domain, tipc_own_addr)) {
293 disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK;
294 res = 0; /* accept any node in own cluster */
Allan Stephens336ebf52012-04-17 18:02:01 -0400295 } else if (in_own_cluster_exact(disc_domain))
Allan Stephens66e019a2011-04-20 16:24:07 -0500296 res = 0; /* accept specified node in own cluster */
297 }
298 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400299 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
300 name);
Allan Stephensa10bd922006-06-25 23:52:17 -0700301 return -EINVAL;
302 }
Allan Stephens9efde4a2011-11-03 13:15:10 -0400303 if ((priority > TIPC_MAX_LINK_PRI) &&
Allan Stephensa10bd922006-06-25 23:52:17 -0700304 (priority != TIPC_MEDIA_LINK_PRI)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400305 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100306 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700307 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100308
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500309 m_ptr = tipc_media_find(b_names.media_name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100310 if (!m_ptr) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400311 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
312 name, b_names.media_name);
Ying Xue7216cd92014-04-21 10:55:48 +0800313 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100314 }
Per Liden16cb4b32006-01-13 22:22:22 +0100315
316 if (priority == TIPC_MEDIA_LINK_PRI)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100317 priority = m_ptr->priority;
318
319restart:
320 bearer_id = MAX_BEARERS;
321 with_this_prio = 1;
322 for (i = MAX_BEARERS; i-- != 0; ) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800323 b_ptr = rtnl_dereference(tn->bearer_list[i]);
Ying Xuef47de122014-03-27 12:54:34 +0800324 if (!b_ptr) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100325 bearer_id = i;
326 continue;
327 }
Ying Xue3874ccb2014-03-27 12:54:33 +0800328 if (!strcmp(name, b_ptr->name)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400329 pr_warn("Bearer <%s> rejected, already enabled\n",
330 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800331 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100332 }
Ying Xue3874ccb2014-03-27 12:54:33 +0800333 if ((b_ptr->priority == priority) &&
Per Lidenb97bf3f2006-01-02 19:04:38 +0100334 (++with_this_prio > 2)) {
335 if (priority-- == 0) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400336 pr_warn("Bearer <%s> rejected, duplicate priority\n",
337 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800338 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100339 }
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400340 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
341 name, priority + 1, priority);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100342 goto restart;
343 }
344 }
345 if (bearer_id >= MAX_BEARERS) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400346 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
347 name, MAX_BEARERS);
Ying Xue7216cd92014-04-21 10:55:48 +0800348 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100349 }
350
Ying Xue3874ccb2014-03-27 12:54:33 +0800351 b_ptr = kzalloc(sizeof(*b_ptr), GFP_ATOMIC);
Ying Xue7216cd92014-04-21 10:55:48 +0800352 if (!b_ptr)
353 return -ENOMEM;
354
Allan Stephens2d627b92011-01-07 13:00:11 -0500355 strcpy(b_ptr->name, name);
Ying Xuee4d050c2013-12-10 20:45:43 -0800356 b_ptr->media = m_ptr;
Ying Xue7f9f95d2015-01-09 15:27:06 +0800357 res = m_ptr->enable_media(net, b_ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100358 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400359 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
360 name, -res);
Ying Xue7216cd92014-04-21 10:55:48 +0800361 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100362 }
363
364 b_ptr->identity = bearer_id;
Allan Stephens5c216e12011-10-18 11:34:29 -0400365 b_ptr->tolerance = m_ptr->tolerance;
366 b_ptr->window = m_ptr->window;
Erik Hugnea21a5842014-03-28 10:32:08 +0100367 b_ptr->domain = disc_domain;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100368 b_ptr->net_plane = bearer_id + 'A';
Per Lidenb97bf3f2006-01-02 19:04:38 +0100369 b_ptr->priority = priority;
Allan Stephens3a777ff2011-04-21 13:58:26 -0500370
Ying Xuec93d3ba2015-01-09 15:27:04 +0800371 res = tipc_disc_create(net, b_ptr, &b_ptr->bcast_addr);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500372 if (res) {
Ying Xuef2f98002015-01-09 15:27:05 +0800373 bearer_disable(net, b_ptr, false);
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400374 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
375 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800376 return -EINVAL;
Allan Stephens3a777ff2011-04-21 13:58:26 -0500377 }
Ying Xue3874ccb2014-03-27 12:54:33 +0800378
Ying Xue7f9f95d2015-01-09 15:27:06 +0800379 rcu_assign_pointer(tn->bearer_list[bearer_id], b_ptr);
Ying Xue3874ccb2014-03-27 12:54:33 +0800380
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400381 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
382 name,
383 tipc_addr_string_fill(addr_string, disc_domain), priority);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100384 return res;
385}
386
387/**
Erik Hugne512137e2013-12-06 10:08:00 -0500388 * tipc_reset_bearer - Reset all links established over this bearer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100389 */
Ying Xuec93d3ba2015-01-09 15:27:04 +0800390static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100391{
Erik Hugne512137e2013-12-06 10:08:00 -0500392 pr_info("Resetting bearer <%s>\n", b_ptr->name);
Ying Xuef2f98002015-01-09 15:27:05 +0800393 tipc_link_reset_list(net, b_ptr->identity);
Ying Xuec93d3ba2015-01-09 15:27:04 +0800394 tipc_disc_reset(net, b_ptr);
Allan Stephens0e35fd52008-07-14 22:44:01 -0700395 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100396}
397
398/**
Paul Gortmaker617d3c72012-04-30 15:29:02 -0400399 * bearer_disable
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900400 *
Ying Xue7216cd92014-04-21 10:55:48 +0800401 * Note: This routine assumes caller holds RTNL lock.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100402 */
Ying Xuef2f98002015-01-09 15:27:05 +0800403static void bearer_disable(struct net *net, struct tipc_bearer *b_ptr,
404 bool shutting_down)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100405{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800406 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue3874ccb2014-03-27 12:54:33 +0800407 u32 i;
408
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400409 pr_info("Disabling bearer <%s>\n", b_ptr->name);
Ying Xue4babbaa2013-10-18 07:23:17 +0200410 b_ptr->media->disable_media(b_ptr);
Ying Xuea8304522014-02-13 17:29:17 -0500411
Ying Xuef2f98002015-01-09 15:27:05 +0800412 tipc_link_delete_list(net, b_ptr->identity, shutting_down);
Ying Xuea8304522014-02-13 17:29:17 -0500413 if (b_ptr->link_req)
414 tipc_disc_delete(b_ptr->link_req);
Ying Xue3874ccb2014-03-27 12:54:33 +0800415
416 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800417 if (b_ptr == rtnl_dereference(tn->bearer_list[i])) {
418 RCU_INIT_POINTER(tn->bearer_list[i], NULL);
Ying Xue3874ccb2014-03-27 12:54:33 +0800419 break;
420 }
421 }
Ying Xuef8322df2014-04-21 10:55:45 +0800422 kfree_rcu(b_ptr, rcu);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100423}
424
Ying Xuef2f98002015-01-09 15:27:05 +0800425int tipc_disable_bearer(struct net *net, const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100426{
Allan Stephens2d627b92011-01-07 13:00:11 -0500427 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100428 int res;
429
Ying Xue7f9f95d2015-01-09 15:27:06 +0800430 b_ptr = tipc_bearer_find(net, name);
Allan Stephensccc901e2010-10-14 13:58:26 +0000431 if (b_ptr == NULL) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400432 pr_warn("Attempt to disable unknown bearer <%s>\n", name);
Allan Stephensccc901e2010-10-14 13:58:26 +0000433 res = -EINVAL;
Allan Stephens28cc9372010-11-30 12:00:56 +0000434 } else {
Ying Xuef2f98002015-01-09 15:27:05 +0800435 bearer_disable(net, b_ptr, false);
Allan Stephens28cc9372010-11-30 12:00:56 +0000436 res = 0;
437 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100438 return res;
439}
440
Ying Xue7f9f95d2015-01-09 15:27:06 +0800441int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b)
Ying Xuee4d050c2013-12-10 20:45:43 -0800442{
443 struct net_device *dev;
444 char *driver_name = strchr((const char *)b->name, ':') + 1;
445
446 /* Find device with specified name */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800447 dev = dev_get_by_name(net, driver_name);
Ying Xuee4d050c2013-12-10 20:45:43 -0800448 if (!dev)
449 return -ENODEV;
450
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400451 /* Associate TIPC bearer with L2 bearer */
Ying Xue2231c5a2014-04-21 10:55:47 +0800452 rcu_assign_pointer(b->media_ptr, dev);
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400453 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
Ying Xuee4d050c2013-12-10 20:45:43 -0800454 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
455 b->bcast_addr.media_id = b->media->type_id;
456 b->bcast_addr.broadcast = 1;
457 b->mtu = dev->mtu;
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400458 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
Ying Xuee4d050c2013-12-10 20:45:43 -0800459 rcu_assign_pointer(dev->tipc_ptr, b);
460 return 0;
461}
462
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400463/* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
Ying Xuee4d050c2013-12-10 20:45:43 -0800464 *
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400465 * Mark L2 bearer as inactive so that incoming buffers are thrown away,
Ying Xuee4d050c2013-12-10 20:45:43 -0800466 * then get worker thread to complete bearer cleanup. (Can't do cleanup
467 * here because cleanup code needs to sleep and caller holds spinlocks.)
468 */
469void tipc_disable_l2_media(struct tipc_bearer *b)
470{
Ying Xue2231c5a2014-04-21 10:55:47 +0800471 struct net_device *dev;
472
473 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
474 RCU_INIT_POINTER(b->media_ptr, NULL);
Ying Xuee4d050c2013-12-10 20:45:43 -0800475 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
Ying Xuef1c8d8c2014-04-21 10:55:49 +0800476 synchronize_net();
Ying Xuee4d050c2013-12-10 20:45:43 -0800477 dev_put(dev);
478}
479
480/**
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400481 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
Ying Xuee4d050c2013-12-10 20:45:43 -0800482 * @buf: the packet to be sent
stephen hemminger963a18552014-01-12 12:48:00 -0800483 * @b_ptr: the bearer through which the packet is to be sent
Ying Xuee4d050c2013-12-10 20:45:43 -0800484 * @dest: peer destination address
485 */
Ying Xue1da46562015-01-09 15:27:07 +0800486int tipc_l2_send_msg(struct net *net, struct sk_buff *buf,
487 struct tipc_bearer *b, struct tipc_media_addr *dest)
Ying Xuee4d050c2013-12-10 20:45:43 -0800488{
489 struct sk_buff *clone;
Ying Xue2231c5a2014-04-21 10:55:47 +0800490 struct net_device *dev;
Ying Xuee4d050c2013-12-10 20:45:43 -0800491 int delta;
Ying Xue2231c5a2014-04-21 10:55:47 +0800492
493 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
494 if (!dev)
495 return 0;
Ying Xuee4d050c2013-12-10 20:45:43 -0800496
497 clone = skb_clone(buf, GFP_ATOMIC);
498 if (!clone)
499 return 0;
500
501 delta = dev->hard_header_len - skb_headroom(buf);
502 if ((delta > 0) &&
503 pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
504 kfree_skb(clone);
505 return 0;
506 }
507
508 skb_reset_network_header(clone);
509 clone->dev = dev;
510 clone->protocol = htons(ETH_P_TIPC);
511 dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
512 dev->dev_addr, clone->len);
513 dev_queue_xmit(clone);
514 return 0;
515}
516
517/* tipc_bearer_send- sends buffer to destination over bearer
518 *
519 * IMPORTANT:
520 * The media send routine must not alter the buffer being passed in
521 * as it may be needed for later retransmission!
522 */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800523void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf,
Ying Xuee4d050c2013-12-10 20:45:43 -0800524 struct tipc_media_addr *dest)
525{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800526 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800527 struct tipc_bearer *b_ptr;
528
529 rcu_read_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800530 b_ptr = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800531 if (likely(b_ptr))
Ying Xue1da46562015-01-09 15:27:07 +0800532 b_ptr->media->send_msg(net, buf, b_ptr, dest);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800533 rcu_read_unlock();
Ying Xuee4d050c2013-12-10 20:45:43 -0800534}
535
Ying Xue6e967ad2013-12-10 20:45:42 -0800536/**
537 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
538 * @buf: the received packet
539 * @dev: the net device that the packet was received on
540 * @pt: the packet_type structure which was used to register this handler
541 * @orig_dev: the original receive net device in case the device is a bond
542 *
543 * Accept only packets explicitly sent to this node, or broadcast packets;
544 * ignores packets sent using interface multicast, and traffic sent to other
545 * nodes (which can happen if interface is running in promiscuous mode).
546 */
547static int tipc_l2_rcv_msg(struct sk_buff *buf, struct net_device *dev,
548 struct packet_type *pt, struct net_device *orig_dev)
549{
550 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100551
Ying Xue6e967ad2013-12-10 20:45:42 -0800552 rcu_read_lock();
Ying Xueca07fb02014-04-21 10:55:43 +0800553 b_ptr = rcu_dereference_rtnl(dev->tipc_ptr);
Ying Xue6e967ad2013-12-10 20:45:42 -0800554 if (likely(b_ptr)) {
555 if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
556 buf->next = NULL;
Ying Xuec93d3ba2015-01-09 15:27:04 +0800557 tipc_rcv(dev_net(dev), buf, b_ptr);
Ying Xue6e967ad2013-12-10 20:45:42 -0800558 rcu_read_unlock();
559 return NET_RX_SUCCESS;
560 }
561 }
562 rcu_read_unlock();
563
564 kfree_skb(buf);
565 return NET_RX_DROP;
566}
567
568/**
569 * tipc_l2_device_event - handle device events from network device
570 * @nb: the context of the notification
571 * @evt: the type of event
572 * @ptr: the net device that the event was on
573 *
574 * This function is called by the Ethernet driver in case of link
575 * change event.
576 */
577static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
578 void *ptr)
579{
Ying Xue6e967ad2013-12-10 20:45:42 -0800580 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Ying Xuec93d3ba2015-01-09 15:27:04 +0800581 struct net *net = dev_net(dev);
582 struct tipc_bearer *b_ptr;
Ying Xue6e967ad2013-12-10 20:45:42 -0800583
Ying Xueca07fb02014-04-21 10:55:43 +0800584 b_ptr = rtnl_dereference(dev->tipc_ptr);
585 if (!b_ptr)
Ying Xue6e967ad2013-12-10 20:45:42 -0800586 return NOTIFY_DONE;
Ying Xue6e967ad2013-12-10 20:45:42 -0800587
588 b_ptr->mtu = dev->mtu;
589
590 switch (evt) {
591 case NETDEV_CHANGE:
592 if (netif_carrier_ok(dev))
593 break;
594 case NETDEV_DOWN:
595 case NETDEV_CHANGEMTU:
Ying Xuec93d3ba2015-01-09 15:27:04 +0800596 tipc_reset_bearer(net, b_ptr);
Erik Hugnea21a5842014-03-28 10:32:08 +0100597 break;
Ying Xue6e967ad2013-12-10 20:45:42 -0800598 case NETDEV_CHANGEADDR:
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400599 b_ptr->media->raw2addr(b_ptr, &b_ptr->addr,
Erik Hugnea21a5842014-03-28 10:32:08 +0100600 (char *)dev->dev_addr);
Ying Xuec93d3ba2015-01-09 15:27:04 +0800601 tipc_reset_bearer(net, b_ptr);
Ying Xue6e967ad2013-12-10 20:45:42 -0800602 break;
603 case NETDEV_UNREGISTER:
604 case NETDEV_CHANGENAME:
Ying Xuef2f98002015-01-09 15:27:05 +0800605 bearer_disable(dev_net(dev), b_ptr, false);
Ying Xue6e967ad2013-12-10 20:45:42 -0800606 break;
607 }
Ying Xue6e967ad2013-12-10 20:45:42 -0800608 return NOTIFY_OK;
609}
610
611static struct packet_type tipc_packet_type __read_mostly = {
Joe Perches184593c2014-03-12 10:04:20 -0700612 .type = htons(ETH_P_TIPC),
Ying Xue6e967ad2013-12-10 20:45:42 -0800613 .func = tipc_l2_rcv_msg,
614};
615
616static struct notifier_block notifier = {
617 .notifier_call = tipc_l2_device_event,
618 .priority = 0,
619};
620
621int tipc_bearer_setup(void)
622{
Ying Xue970122f2014-02-20 11:32:50 +0800623 int err;
624
625 err = register_netdevice_notifier(&notifier);
626 if (err)
627 return err;
Ying Xue6e967ad2013-12-10 20:45:42 -0800628 dev_add_pack(&tipc_packet_type);
Ying Xue970122f2014-02-20 11:32:50 +0800629 return 0;
Ying Xue6e967ad2013-12-10 20:45:42 -0800630}
631
632void tipc_bearer_cleanup(void)
633{
634 unregister_netdevice_notifier(&notifier);
635 dev_remove_pack(&tipc_packet_type);
636}
Per Lidenb97bf3f2006-01-02 19:04:38 +0100637
Ying Xuef2f98002015-01-09 15:27:05 +0800638void tipc_bearer_stop(struct net *net)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100639{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800640 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue3874ccb2014-03-27 12:54:33 +0800641 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100642 u32 i;
643
Per Lidenb97bf3f2006-01-02 19:04:38 +0100644 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800645 b_ptr = rtnl_dereference(tn->bearer_list[i]);
Ying Xuef47de122014-03-27 12:54:34 +0800646 if (b_ptr) {
Ying Xuef2f98002015-01-09 15:27:05 +0800647 bearer_disable(net, b_ptr, true);
Ying Xue7f9f95d2015-01-09 15:27:06 +0800648 tn->bearer_list[i] = NULL;
Ying Xue3874ccb2014-03-27 12:54:33 +0800649 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100650 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100651}
Richard Alpe0655f6a2014-11-20 10:29:07 +0100652
Richard Alpe35b9dd72014-11-20 10:29:08 +0100653/* Caller should hold rtnl_lock to protect the bearer */
Richard Alped8182802014-11-24 11:10:29 +0100654static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
655 struct tipc_bearer *bearer)
Richard Alpe35b9dd72014-11-20 10:29:08 +0100656{
657 void *hdr;
658 struct nlattr *attrs;
659 struct nlattr *prop;
660
661 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
662 NLM_F_MULTI, TIPC_NL_BEARER_GET);
663 if (!hdr)
664 return -EMSGSIZE;
665
666 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
667 if (!attrs)
668 goto msg_full;
669
670 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
671 goto attr_msg_full;
672
673 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
674 if (!prop)
675 goto prop_msg_full;
676 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
677 goto prop_msg_full;
678 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
679 goto prop_msg_full;
680 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
681 goto prop_msg_full;
682
683 nla_nest_end(msg->skb, prop);
684 nla_nest_end(msg->skb, attrs);
685 genlmsg_end(msg->skb, hdr);
686
687 return 0;
688
689prop_msg_full:
690 nla_nest_cancel(msg->skb, prop);
691attr_msg_full:
692 nla_nest_cancel(msg->skb, attrs);
693msg_full:
694 genlmsg_cancel(msg->skb, hdr);
695
696 return -EMSGSIZE;
697}
698
699int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
700{
701 int err;
702 int i = cb->args[0];
703 struct tipc_bearer *bearer;
704 struct tipc_nl_msg msg;
Ying Xue7f9f95d2015-01-09 15:27:06 +0800705 struct net *net = sock_net(skb->sk);
706 struct tipc_net *tn = net_generic(net, tipc_net_id);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100707
708 if (i == MAX_BEARERS)
709 return 0;
710
711 msg.skb = skb;
712 msg.portid = NETLINK_CB(cb->skb).portid;
713 msg.seq = cb->nlh->nlmsg_seq;
714
715 rtnl_lock();
716 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800717 bearer = rtnl_dereference(tn->bearer_list[i]);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100718 if (!bearer)
719 continue;
720
721 err = __tipc_nl_add_bearer(&msg, bearer);
722 if (err)
723 break;
724 }
725 rtnl_unlock();
726
727 cb->args[0] = i;
728 return skb->len;
729}
730
731int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
732{
733 int err;
734 char *name;
735 struct sk_buff *rep;
736 struct tipc_bearer *bearer;
737 struct tipc_nl_msg msg;
738 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Ying Xue7f9f95d2015-01-09 15:27:06 +0800739 struct net *net = genl_info_net(info);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100740
741 if (!info->attrs[TIPC_NLA_BEARER])
742 return -EINVAL;
743
744 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
745 info->attrs[TIPC_NLA_BEARER],
746 tipc_nl_bearer_policy);
747 if (err)
748 return err;
749
750 if (!attrs[TIPC_NLA_BEARER_NAME])
751 return -EINVAL;
752 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
753
754 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
755 if (!rep)
756 return -ENOMEM;
757
758 msg.skb = rep;
759 msg.portid = info->snd_portid;
760 msg.seq = info->snd_seq;
761
762 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800763 bearer = tipc_bearer_find(net, name);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100764 if (!bearer) {
765 err = -EINVAL;
766 goto err_out;
767 }
768
769 err = __tipc_nl_add_bearer(&msg, bearer);
770 if (err)
771 goto err_out;
772 rtnl_unlock();
773
774 return genlmsg_reply(rep, info);
775err_out:
776 rtnl_unlock();
777 nlmsg_free(rep);
778
779 return err;
780}
781
Richard Alpe0655f6a2014-11-20 10:29:07 +0100782int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
783{
784 int err;
785 char *name;
786 struct tipc_bearer *bearer;
787 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Ying Xuef2f98002015-01-09 15:27:05 +0800788 struct net *net = genl_info_net(info);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100789
790 if (!info->attrs[TIPC_NLA_BEARER])
791 return -EINVAL;
792
793 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
794 info->attrs[TIPC_NLA_BEARER],
795 tipc_nl_bearer_policy);
796 if (err)
797 return err;
798
799 if (!attrs[TIPC_NLA_BEARER_NAME])
800 return -EINVAL;
801
802 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
803
804 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800805 bearer = tipc_bearer_find(net, name);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100806 if (!bearer) {
807 rtnl_unlock();
808 return -EINVAL;
809 }
810
Ying Xuef2f98002015-01-09 15:27:05 +0800811 bearer_disable(net, bearer, false);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100812 rtnl_unlock();
813
814 return 0;
815}
816
817int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
818{
Ying Xuec93d3ba2015-01-09 15:27:04 +0800819 struct net *net = genl_info_net(info);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100820 int err;
821 char *bearer;
822 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
823 u32 domain;
824 u32 prio;
825
826 prio = TIPC_MEDIA_LINK_PRI;
827 domain = tipc_own_addr & TIPC_CLUSTER_MASK;
828
829 if (!info->attrs[TIPC_NLA_BEARER])
830 return -EINVAL;
831
832 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
833 info->attrs[TIPC_NLA_BEARER],
834 tipc_nl_bearer_policy);
835 if (err)
836 return err;
837
838 if (!attrs[TIPC_NLA_BEARER_NAME])
839 return -EINVAL;
840
841 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
842
843 if (attrs[TIPC_NLA_BEARER_DOMAIN])
844 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
845
846 if (attrs[TIPC_NLA_BEARER_PROP]) {
847 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
848
849 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
850 props);
851 if (err)
852 return err;
853
854 if (props[TIPC_NLA_PROP_PRIO])
855 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
856 }
857
858 rtnl_lock();
Ying Xuec93d3ba2015-01-09 15:27:04 +0800859 err = tipc_enable_bearer(net, bearer, domain, prio);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100860 if (err) {
861 rtnl_unlock();
862 return err;
863 }
864 rtnl_unlock();
865
866 return 0;
867}
Richard Alpe315c00b2014-11-20 10:29:09 +0100868
869int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
870{
871 int err;
872 char *name;
873 struct tipc_bearer *b;
874 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Ying Xue7f9f95d2015-01-09 15:27:06 +0800875 struct net *net = genl_info_net(info);
Richard Alpe315c00b2014-11-20 10:29:09 +0100876
877 if (!info->attrs[TIPC_NLA_BEARER])
878 return -EINVAL;
879
880 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
881 info->attrs[TIPC_NLA_BEARER],
882 tipc_nl_bearer_policy);
883 if (err)
884 return err;
885
886 if (!attrs[TIPC_NLA_BEARER_NAME])
887 return -EINVAL;
888 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
889
890 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800891 b = tipc_bearer_find(net, name);
Richard Alpe315c00b2014-11-20 10:29:09 +0100892 if (!b) {
893 rtnl_unlock();
894 return -EINVAL;
895 }
896
897 if (attrs[TIPC_NLA_BEARER_PROP]) {
898 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
899
900 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
901 props);
902 if (err) {
903 rtnl_unlock();
904 return err;
905 }
906
907 if (props[TIPC_NLA_PROP_TOL])
908 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
909 if (props[TIPC_NLA_PROP_PRIO])
910 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
911 if (props[TIPC_NLA_PROP_WIN])
912 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
913 }
914 rtnl_unlock();
915
916 return 0;
917}
Richard Alpe46f15c62014-11-20 10:29:15 +0100918
Richard Alped8182802014-11-24 11:10:29 +0100919static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
920 struct tipc_media *media)
Richard Alpe46f15c62014-11-20 10:29:15 +0100921{
922 void *hdr;
923 struct nlattr *attrs;
924 struct nlattr *prop;
925
926 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_v2_family,
927 NLM_F_MULTI, TIPC_NL_MEDIA_GET);
928 if (!hdr)
929 return -EMSGSIZE;
930
931 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
932 if (!attrs)
933 goto msg_full;
934
935 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
936 goto attr_msg_full;
937
938 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
939 if (!prop)
940 goto prop_msg_full;
941 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
942 goto prop_msg_full;
943 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
944 goto prop_msg_full;
945 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
946 goto prop_msg_full;
947
948 nla_nest_end(msg->skb, prop);
949 nla_nest_end(msg->skb, attrs);
950 genlmsg_end(msg->skb, hdr);
951
952 return 0;
953
954prop_msg_full:
955 nla_nest_cancel(msg->skb, prop);
956attr_msg_full:
957 nla_nest_cancel(msg->skb, attrs);
958msg_full:
959 genlmsg_cancel(msg->skb, hdr);
960
961 return -EMSGSIZE;
962}
963
964int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
965{
966 int err;
967 int i = cb->args[0];
968 struct tipc_nl_msg msg;
969
970 if (i == MAX_MEDIA)
971 return 0;
972
973 msg.skb = skb;
974 msg.portid = NETLINK_CB(cb->skb).portid;
975 msg.seq = cb->nlh->nlmsg_seq;
976
977 rtnl_lock();
978 for (; media_info_array[i] != NULL; i++) {
979 err = __tipc_nl_add_media(&msg, media_info_array[i]);
980 if (err)
981 break;
982 }
983 rtnl_unlock();
984
985 cb->args[0] = i;
986 return skb->len;
987}
988
989int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
990{
991 int err;
992 char *name;
993 struct tipc_nl_msg msg;
994 struct tipc_media *media;
995 struct sk_buff *rep;
996 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
997
998 if (!info->attrs[TIPC_NLA_MEDIA])
999 return -EINVAL;
1000
1001 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1002 info->attrs[TIPC_NLA_MEDIA],
1003 tipc_nl_media_policy);
1004 if (err)
1005 return err;
1006
1007 if (!attrs[TIPC_NLA_MEDIA_NAME])
1008 return -EINVAL;
1009 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1010
1011 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1012 if (!rep)
1013 return -ENOMEM;
1014
1015 msg.skb = rep;
1016 msg.portid = info->snd_portid;
1017 msg.seq = info->snd_seq;
1018
1019 rtnl_lock();
1020 media = tipc_media_find(name);
1021 if (!media) {
1022 err = -EINVAL;
1023 goto err_out;
1024 }
1025
1026 err = __tipc_nl_add_media(&msg, media);
1027 if (err)
1028 goto err_out;
1029 rtnl_unlock();
1030
1031 return genlmsg_reply(rep, info);
1032err_out:
1033 rtnl_unlock();
1034 nlmsg_free(rep);
1035
1036 return err;
1037}
Richard Alpe1e554172014-11-20 10:29:16 +01001038
1039int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1040{
1041 int err;
1042 char *name;
1043 struct tipc_media *m;
1044 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1045
1046 if (!info->attrs[TIPC_NLA_MEDIA])
1047 return -EINVAL;
1048
1049 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1050 info->attrs[TIPC_NLA_MEDIA],
1051 tipc_nl_media_policy);
1052
1053 if (!attrs[TIPC_NLA_MEDIA_NAME])
1054 return -EINVAL;
1055 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1056
1057 rtnl_lock();
1058 m = tipc_media_find(name);
1059 if (!m) {
1060 rtnl_unlock();
1061 return -EINVAL;
1062 }
1063
1064 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1065 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1066
1067 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1068 props);
1069 if (err) {
1070 rtnl_unlock();
1071 return err;
1072 }
1073
1074 if (props[TIPC_NLA_PROP_TOL])
1075 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1076 if (props[TIPC_NLA_PROP_PRIO])
1077 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1078 if (props[TIPC_NLA_PROP_WIN])
1079 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1080 }
1081 rtnl_unlock();
1082
1083 return 0;
1084}