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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/bearer.c: TIPC bearer code
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Per Liden593a5f22006-01-11 19:14:19 +01004 * Copyright (c) 1996-2006, Ericsson AB
Allan Stephens2d627b92011-01-07 13:00:11 -05005 * Copyright (c) 2004-2006, 2010-2011, 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
37#include "core.h"
38#include "config.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010039#include "bearer.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010040#include "discover.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010041
Patrick McHardya29a1942013-04-17 06:18:28 +000042#define MAX_ADDR_STR 60
Per Lidenb97bf3f2006-01-02 19:04:38 +010043
Paul Gortmaker358a0d12011-12-29 20:19:42 -050044static struct tipc_media *media_list[MAX_MEDIA];
Allan Stephense3ec9c72010-12-31 18:59:34 +000045static u32 media_count;
Per Lidenb97bf3f2006-01-02 19:04:38 +010046
Allan Stephens2d627b92011-01-07 13:00:11 -050047struct tipc_bearer tipc_bearers[MAX_BEARERS];
Per Lidenb97bf3f2006-01-02 19:04:38 +010048
Allan Stephens3a777ff2011-04-21 13:58:26 -050049static void bearer_disable(struct tipc_bearer *b_ptr);
50
Per Lidenb97bf3f2006-01-02 19:04:38 +010051/**
Allan Stephens5c216e12011-10-18 11:34:29 -040052 * tipc_media_find - locates specified media object by name
Per Lidenb97bf3f2006-01-02 19:04:38 +010053 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050054struct tipc_media *tipc_media_find(const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +010055{
Per Lidenb97bf3f2006-01-02 19:04:38 +010056 u32 i;
57
Allan Stephensa31abe82011-10-07 09:25:12 -040058 for (i = 0; i < media_count; i++) {
59 if (!strcmp(media_list[i]->name, name))
60 return media_list[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +010061 }
Sam Ravnborg1fc54d82006-03-20 22:36:47 -080062 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +010063}
64
65/**
Allan Stephensc79be452011-10-06 16:40:55 -040066 * media_find_id - locates specified media object by type identifier
67 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050068static struct tipc_media *media_find_id(u8 type)
Allan Stephensc79be452011-10-06 16:40:55 -040069{
70 u32 i;
71
72 for (i = 0; i < media_count; i++) {
Allan Stephensa31abe82011-10-07 09:25:12 -040073 if (media_list[i]->type_id == type)
74 return media_list[i];
Allan Stephensc79be452011-10-06 16:40:55 -040075 }
76 return NULL;
77}
78
79/**
Per Lidenb97bf3f2006-01-02 19:04:38 +010080 * tipc_register_media - register a media type
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090081 *
Per Lidenb97bf3f2006-01-02 19:04:38 +010082 * Bearers for this media type must be activated separately at a later stage.
83 */
Paul Gortmaker358a0d12011-12-29 20:19:42 -050084int tipc_register_media(struct tipc_media *m_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +010085{
Per Lidenb97bf3f2006-01-02 19:04:38 +010086 int res = -EINVAL;
87
Per Liden4323add2006-01-18 00:38:21 +010088 write_lock_bh(&tipc_net_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +010089
Ying Xue38129432012-08-16 12:09:09 +000090 if ((strlen(m_ptr->name) + 1) > TIPC_MAX_MEDIA_NAME)
Neil Hormand0021b22010-03-03 08:31:23 +000091 goto exit;
Allan Stephens6c349212011-10-07 09:54:44 -040092 if (m_ptr->priority > TIPC_MAX_LINK_PRI)
Per Lidenb97bf3f2006-01-02 19:04:38 +010093 goto exit;
Allan Stephens706767d2011-10-06 15:28:44 -040094 if ((m_ptr->tolerance < TIPC_MIN_LINK_TOL) ||
Allan Stephens6c349212011-10-07 09:54:44 -040095 (m_ptr->tolerance > TIPC_MAX_LINK_TOL))
Per Lidenb97bf3f2006-01-02 19:04:38 +010096 goto exit;
Allan Stephens6c349212011-10-07 09:54:44 -040097 if (media_count >= MAX_MEDIA)
Per Lidenb97bf3f2006-01-02 19:04:38 +010098 goto exit;
Allan Stephens5c216e12011-10-18 11:34:29 -040099 if (tipc_media_find(m_ptr->name) || media_find_id(m_ptr->type_id))
Allan Stephensc79be452011-10-06 16:40:55 -0400100 goto exit;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100101
Allan Stephensa31abe82011-10-07 09:25:12 -0400102 media_list[media_count] = m_ptr;
Allan Stephensc79be452011-10-06 16:40:55 -0400103 media_count++;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100104 res = 0;
105exit:
Per Liden4323add2006-01-18 00:38:21 +0100106 write_unlock_bh(&tipc_net_lock);
Allan Stephens6c349212011-10-07 09:54:44 -0400107 if (res)
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400108 pr_warn("Media <%s> registration error\n", m_ptr->name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100109 return res;
110}
111
112/**
Per Liden4323add2006-01-18 00:38:21 +0100113 * tipc_media_addr_printf - record media address in print buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100114 */
Erik Hugnedc1aed32012-06-29 00:50:23 -0400115void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100116{
Allan Stephensc61b6662011-10-07 11:31:49 -0400117 char addr_str[MAX_ADDR_STR];
Paul Gortmaker358a0d12011-12-29 20:19:42 -0500118 struct tipc_media *m_ptr;
Erik Hugnedc1aed32012-06-29 00:50:23 -0400119 int ret;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100120
Allan Stephens3d749a62011-10-07 15:19:11 -0400121 m_ptr = media_find_id(a->media_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100122
Allan Stephensc61b6662011-10-07 11:31:49 -0400123 if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str)))
Erik Hugnedc1aed32012-06-29 00:50:23 -0400124 ret = tipc_snprintf(buf, len, "%s(%s)", m_ptr->name, addr_str);
Allan Stephensc61b6662011-10-07 11:31:49 -0400125 else {
Allan Stephensc61b6662011-10-07 11:31:49 -0400126 u32 i;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100127
Erik Hugnedc1aed32012-06-29 00:50:23 -0400128 ret = tipc_snprintf(buf, len, "UNKNOWN(%u)", a->media_id);
Allan Stephens3d749a62011-10-07 15:19:11 -0400129 for (i = 0; i < sizeof(a->value); i++)
Erik Hugnedc1aed32012-06-29 00:50:23 -0400130 ret += tipc_snprintf(buf - ret, len + ret,
131 "-%02x", a->value[i]);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100132 }
133}
134
135/**
Per Liden4323add2006-01-18 00:38:21 +0100136 * tipc_media_get_names - record names of registered media in buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100137 */
Per Liden4323add2006-01-18 00:38:21 +0100138struct sk_buff *tipc_media_get_names(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100139{
140 struct sk_buff *buf;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100141 int i;
142
Per Liden4323add2006-01-18 00:38:21 +0100143 buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100144 if (!buf)
145 return NULL;
146
Per Liden4323add2006-01-18 00:38:21 +0100147 read_lock_bh(&tipc_net_lock);
Allan Stephensa31abe82011-10-07 09:25:12 -0400148 for (i = 0; i < media_count; i++) {
149 tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME,
150 media_list[i]->name,
151 strlen(media_list[i]->name) + 1);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100152 }
Per Liden4323add2006-01-18 00:38:21 +0100153 read_unlock_bh(&tipc_net_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100154 return buf;
155}
156
157/**
158 * bearer_name_validate - validate & (optionally) deconstruct bearer name
Ben Hutchings2c530402012-07-10 10:55:09 +0000159 * @name: ptr to bearer name string
160 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900161 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100162 * Returns 1 if bearer name is valid, otherwise 0.
163 */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900164static int bearer_name_validate(const char *name,
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500165 struct tipc_bearer_names *name_parts)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100166{
167 char name_copy[TIPC_MAX_BEARER_NAME];
168 char *media_name;
169 char *if_name;
170 u32 media_len;
171 u32 if_len;
172
173 /* copy bearer name & ensure length is OK */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100174 name_copy[TIPC_MAX_BEARER_NAME - 1] = 0;
175 /* need above in case non-Posix strncpy() doesn't pad with nulls */
176 strncpy(name_copy, name, TIPC_MAX_BEARER_NAME);
177 if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0)
178 return 0;
179
180 /* ensure all component parts of bearer name are present */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100181 media_name = name_copy;
Allan Stephens2db99832010-12-31 18:59:33 +0000182 if_name = strchr(media_name, ':');
183 if (if_name == NULL)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100184 return 0;
185 *(if_name++) = 0;
186 media_len = if_name - media_name;
187 if_len = strlen(if_name) + 1;
188
189 /* validate component parts of bearer name */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900190 if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) ||
Ying Xuefc073932012-08-16 12:09:08 +0000191 (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100192 return 0;
193
194 /* return bearer name components, if necessary */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100195 if (name_parts) {
196 strcpy(name_parts->media_name, media_name);
197 strcpy(name_parts->if_name, if_name);
198 }
199 return 1;
200}
201
202/**
Allan Stephens5c216e12011-10-18 11:34:29 -0400203 * tipc_bearer_find - locates bearer object with matching bearer name
Per Lidenb97bf3f2006-01-02 19:04:38 +0100204 */
Allan Stephens5c216e12011-10-18 11:34:29 -0400205struct tipc_bearer *tipc_bearer_find(const char *name)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100206{
Allan Stephens2d627b92011-01-07 13:00:11 -0500207 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100208 u32 i;
209
Per Liden4323add2006-01-18 00:38:21 +0100210 for (i = 0, b_ptr = tipc_bearers; i < MAX_BEARERS; i++, b_ptr++) {
Allan Stephens2d627b92011-01-07 13:00:11 -0500211 if (b_ptr->active && (!strcmp(b_ptr->name, name)))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100212 return b_ptr;
213 }
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800214 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100215}
216
217/**
Per Liden4323add2006-01-18 00:38:21 +0100218 * tipc_bearer_find_interface - locates bearer object with matching interface name
Per Lidenb97bf3f2006-01-02 19:04:38 +0100219 */
Allan Stephens2d627b92011-01-07 13:00:11 -0500220struct tipc_bearer *tipc_bearer_find_interface(const char *if_name)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100221{
Allan Stephens2d627b92011-01-07 13:00:11 -0500222 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100223 char *b_if_name;
224 u32 i;
225
Per Liden4323add2006-01-18 00:38:21 +0100226 for (i = 0, b_ptr = tipc_bearers; i < MAX_BEARERS; i++, b_ptr++) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100227 if (!b_ptr->active)
228 continue;
Allan Stephens2d627b92011-01-07 13:00:11 -0500229 b_if_name = strchr(b_ptr->name, ':') + 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100230 if (!strcmp(b_if_name, if_name))
231 return b_ptr;
232 }
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800233 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100234}
235
236/**
Per Liden4323add2006-01-18 00:38:21 +0100237 * tipc_bearer_get_names - record names of bearers in buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100238 */
Per Liden4323add2006-01-18 00:38:21 +0100239struct sk_buff *tipc_bearer_get_names(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100240{
241 struct sk_buff *buf;
Allan Stephens2d627b92011-01-07 13:00:11 -0500242 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100243 int i, j;
244
Per Liden4323add2006-01-18 00:38:21 +0100245 buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100246 if (!buf)
247 return NULL;
248
Per Liden4323add2006-01-18 00:38:21 +0100249 read_lock_bh(&tipc_net_lock);
Allan Stephensa31abe82011-10-07 09:25:12 -0400250 for (i = 0; i < media_count; i++) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100251 for (j = 0; j < MAX_BEARERS; j++) {
Per Liden4323add2006-01-18 00:38:21 +0100252 b_ptr = &tipc_bearers[j];
Allan Stephensa31abe82011-10-07 09:25:12 -0400253 if (b_ptr->active && (b_ptr->media == media_list[i])) {
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900254 tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME,
Allan Stephens2d627b92011-01-07 13:00:11 -0500255 b_ptr->name,
256 strlen(b_ptr->name) + 1);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100257 }
258 }
259 }
Per Liden4323add2006-01-18 00:38:21 +0100260 read_unlock_bh(&tipc_net_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100261 return buf;
262}
263
Allan Stephens2d627b92011-01-07 13:00:11 -0500264void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100265{
Per Liden4323add2006-01-18 00:38:21 +0100266 tipc_nmap_add(&b_ptr->nodes, dest);
Per Liden4323add2006-01-18 00:38:21 +0100267 tipc_bcbearer_sort();
Allan Stephens12099662011-04-21 19:05:25 -0500268 tipc_disc_add_dest(b_ptr->link_req);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100269}
270
Allan Stephens2d627b92011-01-07 13:00:11 -0500271void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100272{
Per Liden4323add2006-01-18 00:38:21 +0100273 tipc_nmap_remove(&b_ptr->nodes, dest);
Per Liden4323add2006-01-18 00:38:21 +0100274 tipc_bcbearer_sort();
Allan Stephens12099662011-04-21 19:05:25 -0500275 tipc_disc_remove_dest(b_ptr->link_req);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100276}
277
278/*
Ying Xue3c294cb2012-11-15 11:34:45 +0800279 * Interrupt enabling new requests after bearer blocking:
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900280 * See bearer_send().
Per Lidenb97bf3f2006-01-02 19:04:38 +0100281 */
Ying Xue3c294cb2012-11-15 11:34:45 +0800282void tipc_continue(struct tipc_bearer *b)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100283{
Ying Xue3c294cb2012-11-15 11:34:45 +0800284 spin_lock_bh(&b->lock);
285 b->blocked = 0;
286 spin_unlock_bh(&b->lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100287}
288
289/*
Ying Xue3c294cb2012-11-15 11:34:45 +0800290 * tipc_bearer_blocked - determines if bearer is currently blocked
Per Lidenb97bf3f2006-01-02 19:04:38 +0100291 */
Ying Xue3c294cb2012-11-15 11:34:45 +0800292int tipc_bearer_blocked(struct tipc_bearer *b)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100293{
Ying Xue3c294cb2012-11-15 11:34:45 +0800294 int res;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100295
Ying Xue3c294cb2012-11-15 11:34:45 +0800296 spin_lock_bh(&b->lock);
297 res = b->blocked;
298 spin_unlock_bh(&b->lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100299
Per Lidenb97bf3f2006-01-02 19:04:38 +0100300 return res;
301}
302
Allan Stephensb274f4a2010-05-11 14:30:16 +0000303/**
Per Lidenb97bf3f2006-01-02 19:04:38 +0100304 * tipc_enable_bearer - enable bearer with the given name
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900305 */
Allan Stephens50d3e632011-02-28 14:56:15 -0500306int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100307{
Allan Stephens2d627b92011-01-07 13:00:11 -0500308 struct tipc_bearer *b_ptr;
Paul Gortmaker358a0d12011-12-29 20:19:42 -0500309 struct tipc_media *m_ptr;
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500310 struct tipc_bearer_names b_names;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100311 char addr_string[16];
312 u32 bearer_id;
313 u32 with_this_prio;
314 u32 i;
315 int res = -EINVAL;
316
Allan Stephensb58343f2011-11-08 13:48:28 -0500317 if (!tipc_own_addr) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400318 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
319 name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100320 return -ENOPROTOOPT;
Allan Stephensa10bd922006-06-25 23:52:17 -0700321 }
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500322 if (!bearer_name_validate(name, &b_names)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400323 pr_warn("Bearer <%s> rejected, illegal name\n", name);
Per Liden16cb4b32006-01-13 22:22:22 +0100324 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700325 }
Allan Stephens66e019a2011-04-20 16:24:07 -0500326 if (tipc_addr_domain_valid(disc_domain) &&
327 (disc_domain != tipc_own_addr)) {
328 if (tipc_in_scope(disc_domain, tipc_own_addr)) {
329 disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK;
330 res = 0; /* accept any node in own cluster */
Allan Stephens336ebf52012-04-17 18:02:01 -0400331 } else if (in_own_cluster_exact(disc_domain))
Allan Stephens66e019a2011-04-20 16:24:07 -0500332 res = 0; /* accept specified node in own cluster */
333 }
334 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400335 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
336 name);
Allan Stephensa10bd922006-06-25 23:52:17 -0700337 return -EINVAL;
338 }
Allan Stephens9efde4a2011-11-03 13:15:10 -0400339 if ((priority > TIPC_MAX_LINK_PRI) &&
Allan Stephensa10bd922006-06-25 23:52:17 -0700340 (priority != TIPC_MEDIA_LINK_PRI)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400341 pr_warn("Bearer <%s> rejected, illegal priority\n", name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100342 return -EINVAL;
Allan Stephensa10bd922006-06-25 23:52:17 -0700343 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100344
Per Liden4323add2006-01-18 00:38:21 +0100345 write_lock_bh(&tipc_net_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100346
Paul Gortmakerf19765f2011-12-29 21:39:49 -0500347 m_ptr = tipc_media_find(b_names.media_name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100348 if (!m_ptr) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400349 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
350 name, b_names.media_name);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500351 goto exit;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100352 }
Per Liden16cb4b32006-01-13 22:22:22 +0100353
354 if (priority == TIPC_MEDIA_LINK_PRI)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100355 priority = m_ptr->priority;
356
357restart:
358 bearer_id = MAX_BEARERS;
359 with_this_prio = 1;
360 for (i = MAX_BEARERS; i-- != 0; ) {
Per Liden4323add2006-01-18 00:38:21 +0100361 if (!tipc_bearers[i].active) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100362 bearer_id = i;
363 continue;
364 }
Allan Stephens2d627b92011-01-07 13:00:11 -0500365 if (!strcmp(name, tipc_bearers[i].name)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400366 pr_warn("Bearer <%s> rejected, already enabled\n",
367 name);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500368 goto exit;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100369 }
Per Liden4323add2006-01-18 00:38:21 +0100370 if ((tipc_bearers[i].priority == priority) &&
Per Lidenb97bf3f2006-01-02 19:04:38 +0100371 (++with_this_prio > 2)) {
372 if (priority-- == 0) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400373 pr_warn("Bearer <%s> rejected, duplicate priority\n",
374 name);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500375 goto exit;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100376 }
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400377 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
378 name, priority + 1, priority);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100379 goto restart;
380 }
381 }
382 if (bearer_id >= MAX_BEARERS) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400383 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
384 name, MAX_BEARERS);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500385 goto exit;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100386 }
387
Per Liden4323add2006-01-18 00:38:21 +0100388 b_ptr = &tipc_bearers[bearer_id];
Allan Stephens2d627b92011-01-07 13:00:11 -0500389 strcpy(b_ptr->name, name);
390 res = m_ptr->enable_bearer(b_ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100391 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400392 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
393 name, -res);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500394 goto exit;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100395 }
396
397 b_ptr->identity = bearer_id;
398 b_ptr->media = m_ptr;
Allan Stephens5c216e12011-10-18 11:34:29 -0400399 b_ptr->tolerance = m_ptr->tolerance;
400 b_ptr->window = m_ptr->window;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100401 b_ptr->net_plane = bearer_id + 'A';
402 b_ptr->active = 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100403 b_ptr->priority = priority;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100404 INIT_LIST_HEAD(&b_ptr->links);
Allan Stephens2d627b92011-01-07 13:00:11 -0500405 spin_lock_init(&b_ptr->lock);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500406
Patrick McHardy8aeb89f2013-04-17 06:18:26 +0000407 res = tipc_disc_create(b_ptr, &b_ptr->bcast_addr, disc_domain);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500408 if (res) {
409 bearer_disable(b_ptr);
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400410 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
411 name);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500412 goto exit;
413 }
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400414 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
415 name,
416 tipc_addr_string_fill(addr_string, disc_domain), priority);
Allan Stephens3a777ff2011-04-21 13:58:26 -0500417exit:
Per Liden4323add2006-01-18 00:38:21 +0100418 write_unlock_bh(&tipc_net_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100419 return res;
420}
421
422/**
Ben Hutchings2c530402012-07-10 10:55:09 +0000423 * tipc_block_bearer - Block the bearer with the given name, and reset all its links
Per Lidenb97bf3f2006-01-02 19:04:38 +0100424 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100425int tipc_block_bearer(const char *name)
426{
Allan Stephens2d627b92011-01-07 13:00:11 -0500427 struct tipc_bearer *b_ptr = NULL;
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500428 struct tipc_link *l_ptr;
429 struct tipc_link *temp_l_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100430
Per Liden4323add2006-01-18 00:38:21 +0100431 read_lock_bh(&tipc_net_lock);
Allan Stephens5c216e12011-10-18 11:34:29 -0400432 b_ptr = tipc_bearer_find(name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100433 if (!b_ptr) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400434 pr_warn("Attempt to block unknown bearer <%s>\n", name);
Per Liden4323add2006-01-18 00:38:21 +0100435 read_unlock_bh(&tipc_net_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100436 return -EINVAL;
437 }
438
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400439 pr_info("Blocking bearer <%s>\n", name);
Allan Stephens2d627b92011-01-07 13:00:11 -0500440 spin_lock_bh(&b_ptr->lock);
441 b_ptr->blocked = 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100442 list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
David S. Miller6c000552008-09-02 23:38:32 -0700443 struct tipc_node *n_ptr = l_ptr->owner;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100444
445 spin_lock_bh(&n_ptr->lock);
Per Liden4323add2006-01-18 00:38:21 +0100446 tipc_link_reset(l_ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100447 spin_unlock_bh(&n_ptr->lock);
448 }
Allan Stephens2d627b92011-01-07 13:00:11 -0500449 spin_unlock_bh(&b_ptr->lock);
Per Liden4323add2006-01-18 00:38:21 +0100450 read_unlock_bh(&tipc_net_lock);
Allan Stephens0e35fd52008-07-14 22:44:01 -0700451 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100452}
453
454/**
Paul Gortmaker617d3c72012-04-30 15:29:02 -0400455 * bearer_disable
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900456 *
Per Liden4323add2006-01-18 00:38:21 +0100457 * Note: This routine assumes caller holds tipc_net_lock.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100458 */
Allan Stephens2d627b92011-01-07 13:00:11 -0500459static void bearer_disable(struct tipc_bearer *b_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100460{
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500461 struct tipc_link *l_ptr;
462 struct tipc_link *temp_l_ptr;
dingtianhongd4cca392013-08-09 17:12:58 +0800463 struct tipc_link_req *temp_req;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100464
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400465 pr_info("Disabling bearer <%s>\n", b_ptr->name);
Allan Stephens2d627b92011-01-07 13:00:11 -0500466 spin_lock_bh(&b_ptr->lock);
Allan Stephens2d627b92011-01-07 13:00:11 -0500467 b_ptr->blocked = 1;
468 b_ptr->media->disable_bearer(b_ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100469 list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
Per Liden4323add2006-01-18 00:38:21 +0100470 tipc_link_delete(l_ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100471 }
dingtianhongd4cca392013-08-09 17:12:58 +0800472 temp_req = b_ptr->link_req;
473 b_ptr->link_req = NULL;
Allan Stephens2d627b92011-01-07 13:00:11 -0500474 spin_unlock_bh(&b_ptr->lock);
dingtianhongd4cca392013-08-09 17:12:58 +0800475
476 if (temp_req)
477 tipc_disc_delete(temp_req);
478
Allan Stephens2d627b92011-01-07 13:00:11 -0500479 memset(b_ptr, 0, sizeof(struct tipc_bearer));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100480}
481
482int tipc_disable_bearer(const char *name)
483{
Allan Stephens2d627b92011-01-07 13:00:11 -0500484 struct tipc_bearer *b_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100485 int res;
486
Per Liden4323add2006-01-18 00:38:21 +0100487 write_lock_bh(&tipc_net_lock);
Allan Stephens5c216e12011-10-18 11:34:29 -0400488 b_ptr = tipc_bearer_find(name);
Allan Stephensccc901e2010-10-14 13:58:26 +0000489 if (b_ptr == NULL) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400490 pr_warn("Attempt to disable unknown bearer <%s>\n", name);
Allan Stephensccc901e2010-10-14 13:58:26 +0000491 res = -EINVAL;
Allan Stephens28cc9372010-11-30 12:00:56 +0000492 } else {
493 bearer_disable(b_ptr);
494 res = 0;
495 }
Per Liden4323add2006-01-18 00:38:21 +0100496 write_unlock_bh(&tipc_net_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100497 return res;
498}
499
500
501
Per Liden4323add2006-01-18 00:38:21 +0100502void tipc_bearer_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100503{
504 u32 i;
505
Per Lidenb97bf3f2006-01-02 19:04:38 +0100506 for (i = 0; i < MAX_BEARERS; i++) {
Per Liden4323add2006-01-18 00:38:21 +0100507 if (tipc_bearers[i].active)
Allan Stephensccc901e2010-10-14 13:58:26 +0000508 bearer_disable(&tipc_bearers[i]);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100509 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100510 media_count = 0;
511}