blob: 52d74760fb68697d508fafb213b56deaed2e8639 [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"
Richard Alpeef20cd42016-08-26 10:52:53 +020045#include "udp_media.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010046
Patrick McHardya29a1942013-04-17 06:18:28 +000047#define MAX_ADDR_STR 60
Per Lidenb97bf3f2006-01-02 19:04:38 +010048
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080049static struct tipc_media * const media_info_array[] = {
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080050 &eth_media_info,
51#ifdef CONFIG_TIPC_MEDIA_IB
52 &ib_media_info,
53#endif
Erik Hugned0f91932015-03-05 10:23:49 +010054#ifdef CONFIG_TIPC_MEDIA_UDP
55 &udp_media_info,
56#endif
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080057 NULL
58};
Per Lidenb97bf3f2006-01-02 19:04:38 +010059
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -040060static struct tipc_bearer *bearer_get(struct net *net, int bearer_id)
61{
62 struct tipc_net *tn = tipc_net(net);
63
64 return rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
65}
66
Jon Paul Maloy1a906322015-11-19 14:30:47 -050067static void bearer_disable(struct net *net, struct tipc_bearer *b);
Allan Stephens3a777ff2011-04-21 13:58:26 -050068
Per Lidenb97bf3f2006-01-02 19:04:38 +010069/**
Allan Stephens5c216e12011-10-18 11:34:29 -040070 * tipc_media_find - locates specified media object by name
Per Lidenb97bf3f2006-01-02 19:04:38 +010071 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050072struct tipc_media *tipc_media_find(const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +010073{
Per Lidenb97bf3f2006-01-02 19:04:38 +010074 u32 i;
75
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080076 for (i = 0; media_info_array[i] != NULL; i++) {
77 if (!strcmp(media_info_array[i]->name, name))
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080078 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +010079 }
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080080 return media_info_array[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +010081}
82
83/**
Allan Stephensc79be452011-10-06 16:40:55 -040084 * media_find_id - locates specified media object by type identifier
85 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050086static struct tipc_media *media_find_id(u8 type)
Allan Stephensc79be452011-10-06 16:40:55 -040087{
88 u32 i;
89
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080090 for (i = 0; media_info_array[i] != NULL; i++) {
91 if (media_info_array[i]->type_id == type)
Jon Paul Maloy5702dba2013-12-10 20:45:39 -080092 break;
Allan Stephensc79be452011-10-06 16:40:55 -040093 }
Jon Paul Maloyef72a7e2013-12-10 20:45:40 -080094 return media_info_array[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +010095}
96
97/**
Per Liden4323add2006-01-18 00:38:21 +010098 * tipc_media_addr_printf - record media address in print buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +010099 */
Erik Hugnedc1aed32012-06-29 00:50:23 -0400100void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100101{
Allan Stephensc61b6662011-10-07 11:31:49 -0400102 char addr_str[MAX_ADDR_STR];
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500103 struct tipc_media *m;
Erik Hugnedc1aed32012-06-29 00:50:23 -0400104 int ret;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100105
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500106 m = media_find_id(a->media_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100107
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500108 if (m && !m->addr2str(a, addr_str, sizeof(addr_str)))
109 ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str);
Allan Stephensc61b6662011-10-07 11:31:49 -0400110 else {
Allan Stephensc61b6662011-10-07 11:31:49 -0400111 u32 i;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100112
Richard Alpe941787b2015-02-09 09:50:19 +0100113 ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id);
Allan Stephens3d749a62011-10-07 15:19:11 -0400114 for (i = 0; i < sizeof(a->value); i++)
Richard Alpe941787b2015-02-09 09:50:19 +0100115 ret += scnprintf(buf - ret, len + ret,
Erik Hugnedc1aed32012-06-29 00:50:23 -0400116 "-%02x", a->value[i]);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100117 }
118}
119
120/**
Per Lidenb97bf3f2006-01-02 19:04:38 +0100121 * bearer_name_validate - validate & (optionally) deconstruct bearer name
Ben Hutchings2c530402012-07-10 10:55:09 +0000122 * @name: ptr to bearer name string
123 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900124 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100125 * Returns 1 if bearer name is valid, otherwise 0.
126 */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900127static int bearer_name_validate(const char *name,
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500128 struct tipc_bearer_names *name_parts)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100129{
130 char name_copy[TIPC_MAX_BEARER_NAME];
131 char *media_name;
132 char *if_name;
133 u32 media_len;
134 u32 if_len;
135
136 /* copy bearer name & ensure length is OK */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100137 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
138 /* need above in case non-Posix strncpy() doesn't pad with nulls */
139 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
140 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
141 return 0;
142
143 /* ensure all component parts of bearer name are present */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100144 media_name = name_copy;
Allan Stephens2db99832010-12-31 18:59:33 +0000145 if_name = strchr(media_name, ':');
146 if (if_name == NULL)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100147 return 0;
148 *(if_name++) = 0;
149 media_len = if_name - media_name;
150 if_len = strlen(if_name) + 1;
151
152 /* validate component parts of bearer name */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900153 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
Ying Xuefc073932012-08-16 12:09:08 +0000154 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100155 return 0;
156
157 /* return bearer name components, if necessary */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100158 if (name_parts) {
159 strcpy(name_parts->media_name, media_name);
160 strcpy(name_parts->if_name, if_name);
161 }
162 return 1;
163}
164
165/**
Allan Stephens5c216e12011-10-18 11:34:29 -0400166 * tipc_bearer_find - locates bearer object with matching bearer name
Per Lidenb97bf3f2006-01-02 19:04:38 +0100167 */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800168struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100169{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800170 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500171 struct tipc_bearer *b;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100172 u32 i;
173
Ying Xue3874ccb2014-03-27 12:54:33 +0800174 for (i = 0; i < MAX_BEARERS; i++) {
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500175 b = rtnl_dereference(tn->bearer_list[i]);
176 if (b && (!strcmp(b->name, name)))
177 return b;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100178 }
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800179 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100180}
181
Parthasarathy Bhuvaraganff0d3e72016-07-26 08:47:21 +0200182/* tipc_bearer_get_name - get the bearer name from its id.
183 * @net: network namespace
184 * @name: a pointer to the buffer where the name will be stored.
185 * @bearer_id: the id to get the name from.
186 */
187int tipc_bearer_get_name(struct net *net, char *name, u32 bearer_id)
188{
189 struct tipc_net *tn = tipc_net(net);
190 struct tipc_bearer *b;
191
192 if (bearer_id >= MAX_BEARERS)
193 return -EINVAL;
194
195 b = rtnl_dereference(tn->bearer_list[bearer_id]);
196 if (!b)
197 return -EINVAL;
198
199 strcpy(name, b->name);
200 return 0;
201}
202
Ying Xue7f9f95d2015-01-09 15:27:06 +0800203void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100204{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800205 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500206 struct tipc_bearer *b;
Ying Xue7a2f7d12014-04-21 10:55:46 +0800207
208 rcu_read_lock();
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500209 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
210 if (b)
211 tipc_disc_add_dest(b->link_req);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800212 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100213}
214
Ying Xue7f9f95d2015-01-09 15:27:06 +0800215void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100216{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800217 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500218 struct tipc_bearer *b;
Ying Xue7a2f7d12014-04-21 10:55:46 +0800219
220 rcu_read_lock();
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500221 b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]);
222 if (b)
223 tipc_disc_remove_dest(b->link_req);
Ying Xue7a2f7d12014-04-21 10:55:46 +0800224 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100225}
226
Allan Stephensb274f4a2010-05-11 14:30:16 +0000227/**
Per Lidenb97bf3f2006-01-02 19:04:38 +0100228 * tipc_enable_bearer - enable bearer with the given name
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900229 */
Richard Alpe9ab15462015-02-09 09:50:05 +0100230static int tipc_enable_bearer(struct net *net, const char *name,
Erik Hugned0f91932015-03-05 10:23:49 +0100231 u32 disc_domain, u32 priority,
232 struct nlattr *attr[])
Per Lidenb97bf3f2006-01-02 19:04:38 +0100233{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800234 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500235 struct tipc_bearer *b;
236 struct tipc_media *m;
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500237 struct tipc_bearer_names b_names;
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400238 struct sk_buff *skb;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100239 char addr_string[16];
240 u32 bearer_id;
241 u32 with_this_prio;
242 u32 i;
243 int res = -EINVAL;
244
Ying Xue34747532015-01-09 15:27:10 +0800245 if (!tn->own_addr) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400246 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
247 name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100248 return -ENOPROTOOPT;
Allan Stephensa10bd922006-06-25 23:52:17 -0700249 }
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500250 if (!bearer_name_validate(name, &b_names)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400251 pr_warn("Bearer <%s> rejected, illegal name\n", name);
Per Liden16cb4b32006-01-13 22:22:22 +0100252 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700253 }
Allan Stephens66e019a2011-04-20 16:24:07 -0500254 if (tipc_addr_domain_valid(disc_domain) &&
Ying Xue34747532015-01-09 15:27:10 +0800255 (disc_domain != tn->own_addr)) {
256 if (tipc_in_scope(disc_domain, tn->own_addr)) {
Parthasarathy Bhuvaragan9ff26e92016-07-26 08:47:18 +0200257 disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
Allan Stephens66e019a2011-04-20 16:24:07 -0500258 res = 0; /* accept any node in own cluster */
Ying Xue34747532015-01-09 15:27:10 +0800259 } else if (in_own_cluster_exact(net, disc_domain))
Allan Stephens66e019a2011-04-20 16:24:07 -0500260 res = 0; /* accept specified node in own cluster */
261 }
262 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400263 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
264 name);
Allan Stephensa10bd922006-06-25 23:52:17 -0700265 return -EINVAL;
266 }
Allan Stephens9efde4a2011-11-03 13:15:10 -0400267 if ((priority > TIPC_MAX_LINK_PRI) &&
Allan Stephensa10bd922006-06-25 23:52:17 -0700268 (priority != TIPC_MEDIA_LINK_PRI)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400269 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100270 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700271 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100272
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500273 m = tipc_media_find(b_names.media_name);
274 if (!m) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400275 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
276 name, b_names.media_name);
Ying Xue7216cd92014-04-21 10:55:48 +0800277 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100278 }
Per Liden16cb4b32006-01-13 22:22:22 +0100279
280 if (priority == TIPC_MEDIA_LINK_PRI)
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500281 priority = m->priority;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100282
283restart:
284 bearer_id = MAX_BEARERS;
285 with_this_prio = 1;
286 for (i = MAX_BEARERS; i-- != 0; ) {
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500287 b = rtnl_dereference(tn->bearer_list[i]);
288 if (!b) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100289 bearer_id = i;
290 continue;
291 }
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500292 if (!strcmp(name, b->name)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400293 pr_warn("Bearer <%s> rejected, already enabled\n",
294 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800295 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100296 }
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500297 if ((b->priority == priority) &&
Per Lidenb97bf3f2006-01-02 19:04:38 +0100298 (++with_this_prio > 2)) {
299 if (priority-- == 0) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400300 pr_warn("Bearer <%s> rejected, duplicate priority\n",
301 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800302 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100303 }
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400304 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
305 name, priority + 1, priority);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100306 goto restart;
307 }
308 }
309 if (bearer_id >= MAX_BEARERS) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400310 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
311 name, MAX_BEARERS);
Ying Xue7216cd92014-04-21 10:55:48 +0800312 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100313 }
314
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500315 b = kzalloc(sizeof(*b), GFP_ATOMIC);
316 if (!b)
Ying Xue7216cd92014-04-21 10:55:48 +0800317 return -ENOMEM;
318
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500319 strcpy(b->name, name);
320 b->media = m;
321 res = m->enable_media(net, b, attr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100322 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400323 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
324 name, -res);
Ying Xue7216cd92014-04-21 10:55:48 +0800325 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100326 }
327
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500328 b->identity = bearer_id;
329 b->tolerance = m->tolerance;
330 b->window = m->window;
331 b->domain = disc_domain;
332 b->net_plane = bearer_id + 'A';
333 b->priority = priority;
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400334 test_and_set_bit_lock(0, &b->up);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500335
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400336 res = tipc_disc_create(net, b, &b->bcast_addr, &skb);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500337 if (res) {
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500338 bearer_disable(net, b);
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400339 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
340 name);
Ying Xue7216cd92014-04-21 10:55:48 +0800341 return -EINVAL;
Allan Stephens3a777ff2011-04-21 13:58:26 -0500342 }
Ying Xue3874ccb2014-03-27 12:54:33 +0800343
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500344 rcu_assign_pointer(tn->bearer_list[bearer_id], b);
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400345 if (skb)
346 tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
Jon Paul Maloy35c55c92016-06-13 20:46:22 -0400347
348 if (tipc_mon_create(net, bearer_id))
349 return -ENOMEM;
350
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400351 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
352 name,
353 tipc_addr_string_fill(addr_string, disc_domain), priority);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100354 return res;
355}
356
357/**
Erik Hugne512137e2013-12-06 10:08:00 -0500358 * tipc_reset_bearer - Reset all links established over this bearer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100359 */
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500360static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100361{
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500362 pr_info("Resetting bearer <%s>\n", b->name);
363 tipc_node_delete_links(net, b->identity);
364 tipc_disc_reset(net, b);
Allan Stephens0e35fd52008-07-14 22:44:01 -0700365 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100366}
367
Jon Paul Maloy1fc07f32016-07-11 16:08:37 -0400368/* tipc_bearer_reset_all - reset all links on all bearers
369 */
370void tipc_bearer_reset_all(struct net *net)
371{
Jon Paul Maloy1fc07f32016-07-11 16:08:37 -0400372 struct tipc_bearer *b;
373 int i;
374
375 for (i = 0; i < MAX_BEARERS; i++) {
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400376 b = bearer_get(net, i);
377 if (b)
378 clear_bit_unlock(0, &b->up);
379 }
380 for (i = 0; i < MAX_BEARERS; i++) {
381 b = bearer_get(net, i);
Jon Paul Maloy1fc07f32016-07-11 16:08:37 -0400382 if (b)
383 tipc_reset_bearer(net, b);
384 }
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400385 for (i = 0; i < MAX_BEARERS; i++) {
386 b = bearer_get(net, i);
387 if (b)
388 test_and_set_bit_lock(0, &b->up);
389 }
Jon Paul Maloy1fc07f32016-07-11 16:08:37 -0400390}
391
Per Lidenb97bf3f2006-01-02 19:04:38 +0100392/**
Paul Gortmaker617d3c72012-04-30 15:29:02 -0400393 * bearer_disable
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900394 *
Ying Xue7216cd92014-04-21 10:55:48 +0800395 * Note: This routine assumes caller holds RTNL lock.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100396 */
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500397static void bearer_disable(struct net *net, struct tipc_bearer *b)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100398{
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400399 struct tipc_net *tn = tipc_net(net);
400 int bearer_id = b->identity;
Ying Xue3874ccb2014-03-27 12:54:33 +0800401
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500402 pr_info("Disabling bearer <%s>\n", b->name);
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400403 clear_bit_unlock(0, &b->up);
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400404 tipc_node_delete_links(net, bearer_id);
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400405 b->media->disable_media(b);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500406 RCU_INIT_POINTER(b->media_ptr, NULL);
407 if (b->link_req)
408 tipc_disc_delete(b->link_req);
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400409 RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500410 kfree_rcu(b, rcu);
Jon Paul Maloy35c55c92016-06-13 20:46:22 -0400411 tipc_mon_delete(net, bearer_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100412}
413
Erik Hugned0f91932015-03-05 10:23:49 +0100414int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
415 struct nlattr *attr[])
Ying Xuee4d050c2013-12-10 20:45:43 -0800416{
417 struct net_device *dev;
418 char *driver_name = strchr((const char *)b->name, ':') + 1;
419
420 /* Find device with specified name */
Ying Xue7f9f95d2015-01-09 15:27:06 +0800421 dev = dev_get_by_name(net, driver_name);
Ying Xuee4d050c2013-12-10 20:45:43 -0800422 if (!dev)
423 return -ENODEV;
Michal Kubeček3de81b72016-12-02 09:33:41 +0100424 if (tipc_mtu_bad(dev, 0)) {
425 dev_put(dev);
426 return -EINVAL;
427 }
Ying Xuee4d050c2013-12-10 20:45:43 -0800428
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400429 /* Associate TIPC bearer with L2 bearer */
Ying Xue2231c5a2014-04-21 10:55:47 +0800430 rcu_assign_pointer(b->media_ptr, dev);
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400431 memset(&b->bcast_addr, 0, sizeof(b->bcast_addr));
Ying Xuee4d050c2013-12-10 20:45:43 -0800432 memcpy(b->bcast_addr.value, dev->broadcast, b->media->hwaddr_len);
433 b->bcast_addr.media_id = b->media->type_id;
434 b->bcast_addr.broadcast = 1;
435 b->mtu = dev->mtu;
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400436 b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr);
Ying Xuee4d050c2013-12-10 20:45:43 -0800437 rcu_assign_pointer(dev->tipc_ptr, b);
438 return 0;
439}
440
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400441/* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
Ying Xuee4d050c2013-12-10 20:45:43 -0800442 *
Jon Paul Maloy282b3a02015-10-15 14:52:45 -0400443 * Mark L2 bearer as inactive so that incoming buffers are thrown away
Ying Xuee4d050c2013-12-10 20:45:43 -0800444 */
445void tipc_disable_l2_media(struct tipc_bearer *b)
446{
Ying Xue2231c5a2014-04-21 10:55:47 +0800447 struct net_device *dev;
448
449 dev = (struct net_device *)rtnl_dereference(b->media_ptr);
Ying Xuee4d050c2013-12-10 20:45:43 -0800450 RCU_INIT_POINTER(dev->tipc_ptr, NULL);
Ying Xuef1c8d8c2014-04-21 10:55:49 +0800451 synchronize_net();
Ying Xuee4d050c2013-12-10 20:45:43 -0800452 dev_put(dev);
453}
454
455/**
Jon Paul Maloy38504c22014-05-14 05:39:13 -0400456 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400457 * @skb: the packet to be sent
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500458 * @b: the bearer through which the packet is to be sent
Ying Xuee4d050c2013-12-10 20:45:43 -0800459 * @dest: peer destination address
460 */
Jon Paul Maloy7214bcf2015-10-22 08:51:45 -0400461int tipc_l2_send_msg(struct net *net, struct sk_buff *skb,
Ying Xue1da46562015-01-09 15:27:07 +0800462 struct tipc_bearer *b, struct tipc_media_addr *dest)
Ying Xuee4d050c2013-12-10 20:45:43 -0800463{
Ying Xue2231c5a2014-04-21 10:55:47 +0800464 struct net_device *dev;
Ying Xuee4d050c2013-12-10 20:45:43 -0800465 int delta;
Ying Xue2231c5a2014-04-21 10:55:47 +0800466
467 dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr);
468 if (!dev)
469 return 0;
Ying Xuee4d050c2013-12-10 20:45:43 -0800470
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400471 delta = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb));
472 if ((delta > 0) && pskb_expand_head(skb, delta, 0, GFP_ATOMIC)) {
473 kfree_skb(skb);
474 return 0;
475 }
Jon Paul Maloy7214bcf2015-10-22 08:51:45 -0400476 skb_reset_network_header(skb);
477 skb->dev = dev;
478 skb->protocol = htons(ETH_P_TIPC);
479 dev_hard_header(skb, dev, ETH_P_TIPC, dest->value,
480 dev->dev_addr, skb->len);
481 dev_queue_xmit(skb);
Ying Xuee4d050c2013-12-10 20:45:43 -0800482 return 0;
483}
484
Jon Paul Maloy959e1782015-10-22 08:51:43 -0400485int tipc_bearer_mtu(struct net *net, u32 bearer_id)
486{
487 int mtu = 0;
488 struct tipc_bearer *b;
489
490 rcu_read_lock();
491 b = rcu_dereference_rtnl(tipc_net(net)->bearer_list[bearer_id]);
492 if (b)
493 mtu = b->mtu;
494 rcu_read_unlock();
495 return mtu;
496}
497
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400498/* tipc_bearer_xmit_skb - sends buffer to destination over bearer
499 */
500void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id,
501 struct sk_buff *skb,
502 struct tipc_media_addr *dest)
503{
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400504 struct tipc_msg *hdr = buf_msg(skb);
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400505 struct tipc_bearer *b;
506
507 rcu_read_lock();
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400508 b = bearer_get(net, bearer_id);
509 if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr))))
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400510 b->media->send_msg(net, skb, b, dest);
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400511 else
512 kfree_skb(skb);
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400513 rcu_read_unlock();
Jon Paul Maloy60852d62015-10-22 08:51:44 -0400514}
515
Jon Paul Maloyaf9b0282015-07-16 16:54:24 -0400516/* tipc_bearer_xmit() -send buffer to destination over bearer
517 */
518void tipc_bearer_xmit(struct net *net, u32 bearer_id,
519 struct sk_buff_head *xmitq,
520 struct tipc_media_addr *dst)
521{
Jon Paul Maloyaf9b0282015-07-16 16:54:24 -0400522 struct tipc_bearer *b;
523 struct sk_buff *skb, *tmp;
524
525 if (skb_queue_empty(xmitq))
526 return;
527
528 rcu_read_lock();
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400529 b = bearer_get(net, bearer_id);
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400530 if (unlikely(!b))
531 __skb_queue_purge(xmitq);
532 skb_queue_walk_safe(xmitq, skb, tmp) {
533 __skb_dequeue(xmitq);
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400534 if (likely(test_bit(0, &b->up) || msg_is_reset(buf_msg(skb))))
535 b->media->send_msg(net, skb, b, dst);
536 else
Wei Yongjun5128b182016-08-23 23:01:02 +0000537 kfree_skb(skb);
Jon Paul Maloyaf9b0282015-07-16 16:54:24 -0400538 }
539 rcu_read_unlock();
540}
541
Jon Paul Maloyb06b2812015-10-22 08:51:42 -0400542/* tipc_bearer_bc_xmit() - broadcast buffers to all destinations
543 */
544void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id,
545 struct sk_buff_head *xmitq)
546{
547 struct tipc_net *tn = tipc_net(net);
548 int net_id = tn->net_id;
549 struct tipc_bearer *b;
550 struct sk_buff *skb, *tmp;
551 struct tipc_msg *hdr;
552
553 rcu_read_lock();
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400554 b = bearer_get(net, bearer_id);
555 if (unlikely(!b || !test_bit(0, &b->up)))
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400556 __skb_queue_purge(xmitq);
557 skb_queue_walk_safe(xmitq, skb, tmp) {
558 hdr = buf_msg(skb);
559 msg_set_non_seq(hdr, 1);
560 msg_set_mc_netid(hdr, net_id);
561 __skb_dequeue(xmitq);
562 b->media->send_msg(net, skb, b, &b->bcast_addr);
Jon Paul Maloyb06b2812015-10-22 08:51:42 -0400563 }
564 rcu_read_unlock();
565}
566
Ying Xue6e967ad2013-12-10 20:45:42 -0800567/**
568 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
569 * @buf: the received packet
570 * @dev: the net device that the packet was received on
571 * @pt: the packet_type structure which was used to register this handler
572 * @orig_dev: the original receive net device in case the device is a bond
573 *
574 * Accept only packets explicitly sent to this node, or broadcast packets;
575 * ignores packets sent using interface multicast, and traffic sent to other
576 * nodes (which can happen if interface is running in promiscuous mode).
577 */
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400578static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev,
Ying Xue6e967ad2013-12-10 20:45:42 -0800579 struct packet_type *pt, struct net_device *orig_dev)
580{
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500581 struct tipc_bearer *b;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100582
Ying Xue6e967ad2013-12-10 20:45:42 -0800583 rcu_read_lock();
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500584 b = rcu_dereference_rtnl(dev->tipc_ptr);
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400585 if (likely(b && test_bit(0, &b->up) &&
586 (skb->pkt_type <= PACKET_BROADCAST))) {
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400587 skb->next = NULL;
588 tipc_rcv(dev_net(dev), skb, b);
589 rcu_read_unlock();
590 return NET_RX_SUCCESS;
Ying Xue6e967ad2013-12-10 20:45:42 -0800591 }
592 rcu_read_unlock();
Jon Paul Maloy4e801fa2016-04-07 10:09:13 -0400593 kfree_skb(skb);
Ying Xue6e967ad2013-12-10 20:45:42 -0800594 return NET_RX_DROP;
595}
596
597/**
598 * tipc_l2_device_event - handle device events from network device
599 * @nb: the context of the notification
600 * @evt: the type of event
601 * @ptr: the net device that the event was on
602 *
603 * This function is called by the Ethernet driver in case of link
604 * change event.
605 */
606static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
607 void *ptr)
608{
Ying Xue6e967ad2013-12-10 20:45:42 -0800609 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Ying Xuec93d3ba2015-01-09 15:27:04 +0800610 struct net *net = dev_net(dev);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500611 struct tipc_bearer *b;
Ying Xue6e967ad2013-12-10 20:45:42 -0800612
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500613 b = rtnl_dereference(dev->tipc_ptr);
614 if (!b)
Ying Xue6e967ad2013-12-10 20:45:42 -0800615 return NOTIFY_DONE;
Ying Xue6e967ad2013-12-10 20:45:42 -0800616
Ying Xue6e967ad2013-12-10 20:45:42 -0800617 switch (evt) {
618 case NETDEV_CHANGE:
619 if (netif_carrier_ok(dev))
620 break;
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400621 case NETDEV_UP:
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400622 test_and_set_bit_lock(0, &b->up);
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400623 break;
Jon Paul Maloy282b3a02015-10-15 14:52:45 -0400624 case NETDEV_GOING_DOWN:
Jon Paul Maloy0d051bf2016-08-16 11:53:50 -0400625 clear_bit_unlock(0, &b->up);
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400626 tipc_reset_bearer(net, b);
627 break;
Ying Xue6e967ad2013-12-10 20:45:42 -0800628 case NETDEV_CHANGEMTU:
Michal Kubeček3de81b72016-12-02 09:33:41 +0100629 if (tipc_mtu_bad(dev, 0)) {
630 bearer_disable(net, b);
631 break;
632 }
633 b->mtu = dev->mtu;
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500634 tipc_reset_bearer(net, b);
Erik Hugnea21a5842014-03-28 10:32:08 +0100635 break;
Ying Xue6e967ad2013-12-10 20:45:42 -0800636 case NETDEV_CHANGEADDR:
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500637 b->media->raw2addr(b, &b->addr,
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400638 (char *)dev->dev_addr);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500639 tipc_reset_bearer(net, b);
Ying Xue6e967ad2013-12-10 20:45:42 -0800640 break;
641 case NETDEV_UNREGISTER:
642 case NETDEV_CHANGENAME:
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500643 bearer_disable(dev_net(dev), b);
Ying Xue6e967ad2013-12-10 20:45:42 -0800644 break;
645 }
Ying Xue6e967ad2013-12-10 20:45:42 -0800646 return NOTIFY_OK;
647}
648
649static struct packet_type tipc_packet_type __read_mostly = {
Joe Perches184593c2014-03-12 10:04:20 -0700650 .type = htons(ETH_P_TIPC),
Ying Xue6e967ad2013-12-10 20:45:42 -0800651 .func = tipc_l2_rcv_msg,
652};
653
654static struct notifier_block notifier = {
655 .notifier_call = tipc_l2_device_event,
656 .priority = 0,
657};
658
659int tipc_bearer_setup(void)
660{
Ying Xue970122f2014-02-20 11:32:50 +0800661 int err;
662
663 err = register_netdevice_notifier(&notifier);
664 if (err)
665 return err;
Ying Xue6e967ad2013-12-10 20:45:42 -0800666 dev_add_pack(&tipc_packet_type);
Ying Xue970122f2014-02-20 11:32:50 +0800667 return 0;
Ying Xue6e967ad2013-12-10 20:45:42 -0800668}
669
670void tipc_bearer_cleanup(void)
671{
672 unregister_netdevice_notifier(&notifier);
673 dev_remove_pack(&tipc_packet_type);
674}
Per Lidenb97bf3f2006-01-02 19:04:38 +0100675
Ying Xuef2f98002015-01-09 15:27:05 +0800676void tipc_bearer_stop(struct net *net)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100677{
Ying Xue7f9f95d2015-01-09 15:27:06 +0800678 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500679 struct tipc_bearer *b;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100680 u32 i;
681
Per Lidenb97bf3f2006-01-02 19:04:38 +0100682 for (i = 0; i < MAX_BEARERS; i++) {
Jon Paul Maloy1a906322015-11-19 14:30:47 -0500683 b = rtnl_dereference(tn->bearer_list[i]);
684 if (b) {
685 bearer_disable(net, b);
Ying Xue7f9f95d2015-01-09 15:27:06 +0800686 tn->bearer_list[i] = NULL;
Ying Xue3874ccb2014-03-27 12:54:33 +0800687 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100688 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100689}
Richard Alpe0655f6a2014-11-20 10:29:07 +0100690
Richard Alpe35b9dd72014-11-20 10:29:08 +0100691/* Caller should hold rtnl_lock to protect the bearer */
Richard Alped8182802014-11-24 11:10:29 +0100692static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200693 struct tipc_bearer *bearer, int nlflags)
Richard Alpe35b9dd72014-11-20 10:29:08 +0100694{
695 void *hdr;
696 struct nlattr *attrs;
697 struct nlattr *prop;
698
Richard Alpebfb3e5d2015-02-09 09:50:03 +0100699 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200700 nlflags, TIPC_NL_BEARER_GET);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100701 if (!hdr)
702 return -EMSGSIZE;
703
704 attrs = nla_nest_start(msg->skb, TIPC_NLA_BEARER);
705 if (!attrs)
706 goto msg_full;
707
708 if (nla_put_string(msg->skb, TIPC_NLA_BEARER_NAME, bearer->name))
709 goto attr_msg_full;
710
711 prop = nla_nest_start(msg->skb, TIPC_NLA_BEARER_PROP);
712 if (!prop)
713 goto prop_msg_full;
714 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, bearer->priority))
715 goto prop_msg_full;
716 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, bearer->tolerance))
717 goto prop_msg_full;
718 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bearer->window))
719 goto prop_msg_full;
720
721 nla_nest_end(msg->skb, prop);
Richard Alpefdb3acc2016-08-26 10:52:55 +0200722
723#ifdef CONFIG_TIPC_MEDIA_UDP
724 if (bearer->media->type_id == TIPC_MEDIA_TYPE_UDP) {
725 if (tipc_udp_nl_add_bearer_data(msg, bearer))
726 goto attr_msg_full;
727 }
728#endif
729
Richard Alpe35b9dd72014-11-20 10:29:08 +0100730 nla_nest_end(msg->skb, attrs);
731 genlmsg_end(msg->skb, hdr);
732
733 return 0;
734
735prop_msg_full:
736 nla_nest_cancel(msg->skb, prop);
737attr_msg_full:
738 nla_nest_cancel(msg->skb, attrs);
739msg_full:
740 genlmsg_cancel(msg->skb, hdr);
741
742 return -EMSGSIZE;
743}
744
745int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb)
746{
747 int err;
748 int i = cb->args[0];
749 struct tipc_bearer *bearer;
750 struct tipc_nl_msg msg;
Ying Xue7f9f95d2015-01-09 15:27:06 +0800751 struct net *net = sock_net(skb->sk);
752 struct tipc_net *tn = net_generic(net, tipc_net_id);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100753
754 if (i == MAX_BEARERS)
755 return 0;
756
757 msg.skb = skb;
758 msg.portid = NETLINK_CB(cb->skb).portid;
759 msg.seq = cb->nlh->nlmsg_seq;
760
761 rtnl_lock();
762 for (i = 0; i < MAX_BEARERS; i++) {
Ying Xue7f9f95d2015-01-09 15:27:06 +0800763 bearer = rtnl_dereference(tn->bearer_list[i]);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100764 if (!bearer)
765 continue;
766
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200767 err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100768 if (err)
769 break;
770 }
771 rtnl_unlock();
772
773 cb->args[0] = i;
774 return skb->len;
775}
776
777int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info)
778{
779 int err;
780 char *name;
781 struct sk_buff *rep;
782 struct tipc_bearer *bearer;
783 struct tipc_nl_msg msg;
784 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Ying Xue7f9f95d2015-01-09 15:27:06 +0800785 struct net *net = genl_info_net(info);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100786
787 if (!info->attrs[TIPC_NLA_BEARER])
788 return -EINVAL;
789
790 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
791 info->attrs[TIPC_NLA_BEARER],
792 tipc_nl_bearer_policy);
793 if (err)
794 return err;
795
796 if (!attrs[TIPC_NLA_BEARER_NAME])
797 return -EINVAL;
798 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
799
800 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
801 if (!rep)
802 return -ENOMEM;
803
804 msg.skb = rep;
805 msg.portid = info->snd_portid;
806 msg.seq = info->snd_seq;
807
808 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800809 bearer = tipc_bearer_find(net, name);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100810 if (!bearer) {
811 err = -EINVAL;
812 goto err_out;
813 }
814
Nicolas Dichtelf2f67392015-04-28 18:33:50 +0200815 err = __tipc_nl_add_bearer(&msg, bearer, 0);
Richard Alpe35b9dd72014-11-20 10:29:08 +0100816 if (err)
817 goto err_out;
818 rtnl_unlock();
819
820 return genlmsg_reply(rep, info);
821err_out:
822 rtnl_unlock();
823 nlmsg_free(rep);
824
825 return err;
826}
827
Richard Alpe0655f6a2014-11-20 10:29:07 +0100828int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info)
829{
830 int err;
831 char *name;
832 struct tipc_bearer *bearer;
833 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Richard Alpe9ab15462015-02-09 09:50:05 +0100834 struct net *net = sock_net(skb->sk);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100835
836 if (!info->attrs[TIPC_NLA_BEARER])
837 return -EINVAL;
838
839 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
840 info->attrs[TIPC_NLA_BEARER],
841 tipc_nl_bearer_policy);
842 if (err)
843 return err;
844
845 if (!attrs[TIPC_NLA_BEARER_NAME])
846 return -EINVAL;
847
848 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
849
850 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800851 bearer = tipc_bearer_find(net, name);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100852 if (!bearer) {
853 rtnl_unlock();
854 return -EINVAL;
855 }
856
Jon Paul Maloyb1c29f62015-05-14 10:46:11 -0400857 bearer_disable(net, bearer);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100858 rtnl_unlock();
859
860 return 0;
861}
862
863int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info)
864{
865 int err;
866 char *bearer;
867 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Richard Alpe9ab15462015-02-09 09:50:05 +0100868 struct net *net = sock_net(skb->sk);
869 struct tipc_net *tn = net_generic(net, tipc_net_id);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100870 u32 domain;
871 u32 prio;
872
873 prio = TIPC_MEDIA_LINK_PRI;
Parthasarathy Bhuvaragan9ff26e92016-07-26 08:47:18 +0200874 domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK;
Richard Alpe0655f6a2014-11-20 10:29:07 +0100875
876 if (!info->attrs[TIPC_NLA_BEARER])
877 return -EINVAL;
878
879 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
880 info->attrs[TIPC_NLA_BEARER],
881 tipc_nl_bearer_policy);
882 if (err)
883 return err;
884
885 if (!attrs[TIPC_NLA_BEARER_NAME])
886 return -EINVAL;
887
888 bearer = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
889
890 if (attrs[TIPC_NLA_BEARER_DOMAIN])
891 domain = nla_get_u32(attrs[TIPC_NLA_BEARER_DOMAIN]);
892
893 if (attrs[TIPC_NLA_BEARER_PROP]) {
894 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
895
896 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
897 props);
898 if (err)
899 return err;
900
901 if (props[TIPC_NLA_PROP_PRIO])
902 prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
903 }
904
905 rtnl_lock();
Erik Hugned0f91932015-03-05 10:23:49 +0100906 err = tipc_enable_bearer(net, bearer, domain, prio, attrs);
Richard Alpe0655f6a2014-11-20 10:29:07 +0100907 if (err) {
908 rtnl_unlock();
909 return err;
910 }
911 rtnl_unlock();
912
913 return 0;
914}
Richard Alpe315c00b2014-11-20 10:29:09 +0100915
Richard Alpeef20cd42016-08-26 10:52:53 +0200916int tipc_nl_bearer_add(struct sk_buff *skb, struct genl_info *info)
917{
918 int err;
919 char *name;
920 struct tipc_bearer *b;
921 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
922 struct net *net = sock_net(skb->sk);
923
924 if (!info->attrs[TIPC_NLA_BEARER])
925 return -EINVAL;
926
927 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
928 info->attrs[TIPC_NLA_BEARER],
929 tipc_nl_bearer_policy);
930 if (err)
931 return err;
932
933 if (!attrs[TIPC_NLA_BEARER_NAME])
934 return -EINVAL;
935 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
936
937 rtnl_lock();
938 b = tipc_bearer_find(net, name);
939 if (!b) {
940 rtnl_unlock();
941 return -EINVAL;
942 }
943
944#ifdef CONFIG_TIPC_MEDIA_UDP
945 if (attrs[TIPC_NLA_BEARER_UDP_OPTS]) {
946 err = tipc_udp_nl_bearer_add(b,
947 attrs[TIPC_NLA_BEARER_UDP_OPTS]);
948 if (err) {
949 rtnl_unlock();
950 return err;
951 }
952 }
953#endif
954 rtnl_unlock();
955
956 return 0;
957}
958
Richard Alpe315c00b2014-11-20 10:29:09 +0100959int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info)
960{
961 int err;
962 char *name;
963 struct tipc_bearer *b;
964 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
Richard Alpec3d6fb82015-05-06 13:58:54 +0200965 struct net *net = sock_net(skb->sk);
Richard Alpe315c00b2014-11-20 10:29:09 +0100966
967 if (!info->attrs[TIPC_NLA_BEARER])
968 return -EINVAL;
969
970 err = nla_parse_nested(attrs, TIPC_NLA_BEARER_MAX,
971 info->attrs[TIPC_NLA_BEARER],
972 tipc_nl_bearer_policy);
973 if (err)
974 return err;
975
976 if (!attrs[TIPC_NLA_BEARER_NAME])
977 return -EINVAL;
978 name = nla_data(attrs[TIPC_NLA_BEARER_NAME]);
979
980 rtnl_lock();
Ying Xue7f9f95d2015-01-09 15:27:06 +0800981 b = tipc_bearer_find(net, name);
Richard Alpe315c00b2014-11-20 10:29:09 +0100982 if (!b) {
983 rtnl_unlock();
984 return -EINVAL;
985 }
986
987 if (attrs[TIPC_NLA_BEARER_PROP]) {
988 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
989
990 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_BEARER_PROP],
991 props);
992 if (err) {
993 rtnl_unlock();
994 return err;
995 }
996
997 if (props[TIPC_NLA_PROP_TOL])
998 b->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
999 if (props[TIPC_NLA_PROP_PRIO])
1000 b->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1001 if (props[TIPC_NLA_PROP_WIN])
1002 b->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1003 }
1004 rtnl_unlock();
1005
1006 return 0;
1007}
Richard Alpe46f15c62014-11-20 10:29:15 +01001008
Richard Alped8182802014-11-24 11:10:29 +01001009static int __tipc_nl_add_media(struct tipc_nl_msg *msg,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +02001010 struct tipc_media *media, int nlflags)
Richard Alpe46f15c62014-11-20 10:29:15 +01001011{
1012 void *hdr;
1013 struct nlattr *attrs;
1014 struct nlattr *prop;
1015
Richard Alpebfb3e5d2015-02-09 09:50:03 +01001016 hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
Nicolas Dichtelf2f67392015-04-28 18:33:50 +02001017 nlflags, TIPC_NL_MEDIA_GET);
Richard Alpe46f15c62014-11-20 10:29:15 +01001018 if (!hdr)
1019 return -EMSGSIZE;
1020
1021 attrs = nla_nest_start(msg->skb, TIPC_NLA_MEDIA);
1022 if (!attrs)
1023 goto msg_full;
1024
1025 if (nla_put_string(msg->skb, TIPC_NLA_MEDIA_NAME, media->name))
1026 goto attr_msg_full;
1027
1028 prop = nla_nest_start(msg->skb, TIPC_NLA_MEDIA_PROP);
1029 if (!prop)
1030 goto prop_msg_full;
1031 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_PRIO, media->priority))
1032 goto prop_msg_full;
1033 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_TOL, media->tolerance))
1034 goto prop_msg_full;
1035 if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, media->window))
1036 goto prop_msg_full;
1037
1038 nla_nest_end(msg->skb, prop);
1039 nla_nest_end(msg->skb, attrs);
1040 genlmsg_end(msg->skb, hdr);
1041
1042 return 0;
1043
1044prop_msg_full:
1045 nla_nest_cancel(msg->skb, prop);
1046attr_msg_full:
1047 nla_nest_cancel(msg->skb, attrs);
1048msg_full:
1049 genlmsg_cancel(msg->skb, hdr);
1050
1051 return -EMSGSIZE;
1052}
1053
1054int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb)
1055{
1056 int err;
1057 int i = cb->args[0];
1058 struct tipc_nl_msg msg;
1059
1060 if (i == MAX_MEDIA)
1061 return 0;
1062
1063 msg.skb = skb;
1064 msg.portid = NETLINK_CB(cb->skb).portid;
1065 msg.seq = cb->nlh->nlmsg_seq;
1066
1067 rtnl_lock();
1068 for (; media_info_array[i] != NULL; i++) {
Nicolas Dichtelf2f67392015-04-28 18:33:50 +02001069 err = __tipc_nl_add_media(&msg, media_info_array[i],
1070 NLM_F_MULTI);
Richard Alpe46f15c62014-11-20 10:29:15 +01001071 if (err)
1072 break;
1073 }
1074 rtnl_unlock();
1075
1076 cb->args[0] = i;
1077 return skb->len;
1078}
1079
1080int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info)
1081{
1082 int err;
1083 char *name;
1084 struct tipc_nl_msg msg;
1085 struct tipc_media *media;
1086 struct sk_buff *rep;
1087 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1088
1089 if (!info->attrs[TIPC_NLA_MEDIA])
1090 return -EINVAL;
1091
1092 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1093 info->attrs[TIPC_NLA_MEDIA],
1094 tipc_nl_media_policy);
1095 if (err)
1096 return err;
1097
1098 if (!attrs[TIPC_NLA_MEDIA_NAME])
1099 return -EINVAL;
1100 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1101
1102 rep = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1103 if (!rep)
1104 return -ENOMEM;
1105
1106 msg.skb = rep;
1107 msg.portid = info->snd_portid;
1108 msg.seq = info->snd_seq;
1109
1110 rtnl_lock();
1111 media = tipc_media_find(name);
1112 if (!media) {
1113 err = -EINVAL;
1114 goto err_out;
1115 }
1116
Nicolas Dichtelf2f67392015-04-28 18:33:50 +02001117 err = __tipc_nl_add_media(&msg, media, 0);
Richard Alpe46f15c62014-11-20 10:29:15 +01001118 if (err)
1119 goto err_out;
1120 rtnl_unlock();
1121
1122 return genlmsg_reply(rep, info);
1123err_out:
1124 rtnl_unlock();
1125 nlmsg_free(rep);
1126
1127 return err;
1128}
Richard Alpe1e554172014-11-20 10:29:16 +01001129
1130int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
1131{
1132 int err;
1133 char *name;
1134 struct tipc_media *m;
1135 struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
1136
1137 if (!info->attrs[TIPC_NLA_MEDIA])
1138 return -EINVAL;
1139
1140 err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
1141 info->attrs[TIPC_NLA_MEDIA],
1142 tipc_nl_media_policy);
1143
1144 if (!attrs[TIPC_NLA_MEDIA_NAME])
1145 return -EINVAL;
1146 name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
1147
1148 rtnl_lock();
1149 m = tipc_media_find(name);
1150 if (!m) {
1151 rtnl_unlock();
1152 return -EINVAL;
1153 }
1154
1155 if (attrs[TIPC_NLA_MEDIA_PROP]) {
1156 struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
1157
1158 err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
1159 props);
1160 if (err) {
1161 rtnl_unlock();
1162 return err;
1163 }
1164
1165 if (props[TIPC_NLA_PROP_TOL])
1166 m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
1167 if (props[TIPC_NLA_PROP_PRIO])
1168 m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
1169 if (props[TIPC_NLA_PROP_WIN])
1170 m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
1171 }
1172 rtnl_unlock();
1173
1174 return 0;
1175}