Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/bearer.c: TIPC bearer code |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Jon Paul Maloy | 35c55c9 | 2016-06-13 20:46:22 -0400 | [diff] [blame] | 4 | * Copyright (c) 1996-2006, 2013-2016, Ericsson AB |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 5 | * Copyright (c) 2004-2006, 2010-2013, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 6 | * All rights reserved. |
| 7 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 8 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 11 | * 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 Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 19 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 20 | * 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 Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 37 | #include <net/sock.h> |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 38 | #include "core.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "bearer.h" |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 40 | #include "link.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 41 | #include "discover.h" |
Jon Paul Maloy | 35c55c9 | 2016-06-13 20:46:22 -0400 | [diff] [blame] | 42 | #include "monitor.h" |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 43 | #include "bcast.h" |
Richard Alpe | 49cc66e | 2016-03-04 17:04:42 +0100 | [diff] [blame] | 44 | #include "netlink.h" |
Richard Alpe | ef20cd4 | 2016-08-26 10:52:53 +0200 | [diff] [blame] | 45 | #include "udp_media.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 46 | |
Patrick McHardy | a29a194 | 2013-04-17 06:18:28 +0000 | [diff] [blame] | 47 | #define MAX_ADDR_STR 60 |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 48 | |
Jon Paul Maloy | ef72a7e | 2013-12-10 20:45:40 -0800 | [diff] [blame] | 49 | static struct tipc_media * const media_info_array[] = { |
Jon Paul Maloy | 5702dba | 2013-12-10 20:45:39 -0800 | [diff] [blame] | 50 | ð_media_info, |
| 51 | #ifdef CONFIG_TIPC_MEDIA_IB |
| 52 | &ib_media_info, |
| 53 | #endif |
Erik Hugne | d0f9193 | 2015-03-05 10:23:49 +0100 | [diff] [blame] | 54 | #ifdef CONFIG_TIPC_MEDIA_UDP |
| 55 | &udp_media_info, |
| 56 | #endif |
Jon Paul Maloy | 5702dba | 2013-12-10 20:45:39 -0800 | [diff] [blame] | 57 | NULL |
| 58 | }; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 59 | |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 60 | static 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 Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 67 | static void bearer_disable(struct net *net, struct tipc_bearer *b); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 68 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 69 | /** |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 70 | * tipc_media_find - locates specified media object by name |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 71 | */ |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame] | 72 | struct tipc_media *tipc_media_find(const char *name) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 73 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 74 | u32 i; |
| 75 | |
Jon Paul Maloy | ef72a7e | 2013-12-10 20:45:40 -0800 | [diff] [blame] | 76 | for (i = 0; media_info_array[i] != NULL; i++) { |
| 77 | if (!strcmp(media_info_array[i]->name, name)) |
Jon Paul Maloy | 5702dba | 2013-12-10 20:45:39 -0800 | [diff] [blame] | 78 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 79 | } |
Jon Paul Maloy | ef72a7e | 2013-12-10 20:45:40 -0800 | [diff] [blame] | 80 | return media_info_array[i]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | /** |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 84 | * media_find_id - locates specified media object by type identifier |
| 85 | */ |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame] | 86 | static struct tipc_media *media_find_id(u8 type) |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 87 | { |
| 88 | u32 i; |
| 89 | |
Jon Paul Maloy | ef72a7e | 2013-12-10 20:45:40 -0800 | [diff] [blame] | 90 | for (i = 0; media_info_array[i] != NULL; i++) { |
| 91 | if (media_info_array[i]->type_id == type) |
Jon Paul Maloy | 5702dba | 2013-12-10 20:45:39 -0800 | [diff] [blame] | 92 | break; |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 93 | } |
Jon Paul Maloy | ef72a7e | 2013-12-10 20:45:40 -0800 | [diff] [blame] | 94 | return media_info_array[i]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 98 | * tipc_media_addr_printf - record media address in print buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 99 | */ |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 100 | void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 101 | { |
Allan Stephens | c61b666 | 2011-10-07 11:31:49 -0400 | [diff] [blame] | 102 | char addr_str[MAX_ADDR_STR]; |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 103 | struct tipc_media *m; |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 104 | int ret; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 105 | |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 106 | m = media_find_id(a->media_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 107 | |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 108 | if (m && !m->addr2str(a, addr_str, sizeof(addr_str))) |
| 109 | ret = scnprintf(buf, len, "%s(%s)", m->name, addr_str); |
Allan Stephens | c61b666 | 2011-10-07 11:31:49 -0400 | [diff] [blame] | 110 | else { |
Allan Stephens | c61b666 | 2011-10-07 11:31:49 -0400 | [diff] [blame] | 111 | u32 i; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 112 | |
Richard Alpe | 941787b | 2015-02-09 09:50:19 +0100 | [diff] [blame] | 113 | ret = scnprintf(buf, len, "UNKNOWN(%u)", a->media_id); |
Allan Stephens | 3d749a6 | 2011-10-07 15:19:11 -0400 | [diff] [blame] | 114 | for (i = 0; i < sizeof(a->value); i++) |
Richard Alpe | 941787b | 2015-02-09 09:50:19 +0100 | [diff] [blame] | 115 | ret += scnprintf(buf - ret, len + ret, |
Erik Hugne | dc1aed3 | 2012-06-29 00:50:23 -0400 | [diff] [blame] | 116 | "-%02x", a->value[i]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 117 | } |
| 118 | } |
| 119 | |
| 120 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 121 | * bearer_name_validate - validate & (optionally) deconstruct bearer name |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 122 | * @name: ptr to bearer name string |
| 123 | * @name_parts: ptr to area for bearer name components (or NULL if not needed) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 124 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 125 | * Returns 1 if bearer name is valid, otherwise 0. |
| 126 | */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 127 | static int bearer_name_validate(const char *name, |
Paul Gortmaker | f19765f | 2011-12-29 21:39:49 -0500 | [diff] [blame] | 128 | struct tipc_bearer_names *name_parts) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 129 | { |
| 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 Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 137 | 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 Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 144 | media_name = name_copy; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 145 | if_name = strchr(media_name, ':'); |
| 146 | if (if_name == NULL) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 147 | 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 Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 153 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
Ying Xue | fc07393 | 2012-08-16 12:09:08 +0000 | [diff] [blame] | 154 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 155 | return 0; |
| 156 | |
| 157 | /* return bearer name components, if necessary */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 158 | 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 Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 166 | * tipc_bearer_find - locates bearer object with matching bearer name |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 167 | */ |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 168 | struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 169 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 170 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 171 | struct tipc_bearer *b; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 172 | u32 i; |
| 173 | |
Ying Xue | 3874ccb | 2014-03-27 12:54:33 +0800 | [diff] [blame] | 174 | for (i = 0; i < MAX_BEARERS; i++) { |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 175 | b = rtnl_dereference(tn->bearer_list[i]); |
| 176 | if (b && (!strcmp(b->name, name))) |
| 177 | return b; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 178 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 179 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 180 | } |
| 181 | |
Parthasarathy Bhuvaragan | ff0d3e7 | 2016-07-26 08:47:21 +0200 | [diff] [blame] | 182 | /* 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 | */ |
| 187 | int 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 Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 203 | void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 204 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 205 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 206 | struct tipc_bearer *b; |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 207 | |
| 208 | rcu_read_lock(); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 209 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
| 210 | if (b) |
| 211 | tipc_disc_add_dest(b->link_req); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 212 | rcu_read_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 213 | } |
| 214 | |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 215 | void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 216 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 217 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 218 | struct tipc_bearer *b; |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 219 | |
| 220 | rcu_read_lock(); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 221 | b = rcu_dereference_rtnl(tn->bearer_list[bearer_id]); |
| 222 | if (b) |
| 223 | tipc_disc_remove_dest(b->link_req); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 224 | rcu_read_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 225 | } |
| 226 | |
Allan Stephens | b274f4a | 2010-05-11 14:30:16 +0000 | [diff] [blame] | 227 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 228 | * tipc_enable_bearer - enable bearer with the given name |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 229 | */ |
Richard Alpe | 9ab1546 | 2015-02-09 09:50:05 +0100 | [diff] [blame] | 230 | static int tipc_enable_bearer(struct net *net, const char *name, |
Erik Hugne | d0f9193 | 2015-03-05 10:23:49 +0100 | [diff] [blame] | 231 | u32 disc_domain, u32 priority, |
| 232 | struct nlattr *attr[]) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 233 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 234 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 235 | struct tipc_bearer *b; |
| 236 | struct tipc_media *m; |
Paul Gortmaker | f19765f | 2011-12-29 21:39:49 -0500 | [diff] [blame] | 237 | struct tipc_bearer_names b_names; |
Jon Paul Maloy | 4e801fa | 2016-04-07 10:09:13 -0400 | [diff] [blame] | 238 | struct sk_buff *skb; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 239 | char addr_string[16]; |
| 240 | u32 bearer_id; |
| 241 | u32 with_this_prio; |
| 242 | u32 i; |
| 243 | int res = -EINVAL; |
| 244 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 245 | if (!tn->own_addr) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 246 | pr_warn("Bearer <%s> rejected, not supported in standalone mode\n", |
| 247 | name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 248 | return -ENOPROTOOPT; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 249 | } |
Paul Gortmaker | f19765f | 2011-12-29 21:39:49 -0500 | [diff] [blame] | 250 | if (!bearer_name_validate(name, &b_names)) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 251 | pr_warn("Bearer <%s> rejected, illegal name\n", name); |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 252 | return -EINVAL; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 253 | } |
Allan Stephens | 66e019a | 2011-04-20 16:24:07 -0500 | [diff] [blame] | 254 | if (tipc_addr_domain_valid(disc_domain) && |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 255 | (disc_domain != tn->own_addr)) { |
| 256 | if (tipc_in_scope(disc_domain, tn->own_addr)) { |
Parthasarathy Bhuvaragan | 9ff26e9 | 2016-07-26 08:47:18 +0200 | [diff] [blame] | 257 | disc_domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
Allan Stephens | 66e019a | 2011-04-20 16:24:07 -0500 | [diff] [blame] | 258 | res = 0; /* accept any node in own cluster */ |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 259 | } else if (in_own_cluster_exact(net, disc_domain)) |
Allan Stephens | 66e019a | 2011-04-20 16:24:07 -0500 | [diff] [blame] | 260 | res = 0; /* accept specified node in own cluster */ |
| 261 | } |
| 262 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 263 | pr_warn("Bearer <%s> rejected, illegal discovery domain\n", |
| 264 | name); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 265 | return -EINVAL; |
| 266 | } |
Allan Stephens | 9efde4a | 2011-11-03 13:15:10 -0400 | [diff] [blame] | 267 | if ((priority > TIPC_MAX_LINK_PRI) && |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 268 | (priority != TIPC_MEDIA_LINK_PRI)) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 269 | pr_warn("Bearer <%s> rejected, illegal priority\n", name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 270 | return -EINVAL; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 271 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 272 | |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 273 | m = tipc_media_find(b_names.media_name); |
| 274 | if (!m) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 275 | pr_warn("Bearer <%s> rejected, media <%s> not registered\n", |
| 276 | name, b_names.media_name); |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 277 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 278 | } |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 279 | |
| 280 | if (priority == TIPC_MEDIA_LINK_PRI) |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 281 | priority = m->priority; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 282 | |
| 283 | restart: |
| 284 | bearer_id = MAX_BEARERS; |
| 285 | with_this_prio = 1; |
| 286 | for (i = MAX_BEARERS; i-- != 0; ) { |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 287 | b = rtnl_dereference(tn->bearer_list[i]); |
| 288 | if (!b) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 289 | bearer_id = i; |
| 290 | continue; |
| 291 | } |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 292 | if (!strcmp(name, b->name)) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 293 | pr_warn("Bearer <%s> rejected, already enabled\n", |
| 294 | name); |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 295 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 296 | } |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 297 | if ((b->priority == priority) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 298 | (++with_this_prio > 2)) { |
| 299 | if (priority-- == 0) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 300 | pr_warn("Bearer <%s> rejected, duplicate priority\n", |
| 301 | name); |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 302 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 303 | } |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 304 | pr_warn("Bearer <%s> priority adjustment required %u->%u\n", |
| 305 | name, priority + 1, priority); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 306 | goto restart; |
| 307 | } |
| 308 | } |
| 309 | if (bearer_id >= MAX_BEARERS) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 310 | pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
| 311 | name, MAX_BEARERS); |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 312 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 313 | } |
| 314 | |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 315 | b = kzalloc(sizeof(*b), GFP_ATOMIC); |
| 316 | if (!b) |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 317 | return -ENOMEM; |
| 318 | |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 319 | strcpy(b->name, name); |
| 320 | b->media = m; |
| 321 | res = m->enable_media(net, b, attr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 322 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 323 | pr_warn("Bearer <%s> rejected, enable failure (%d)\n", |
| 324 | name, -res); |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 325 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 326 | } |
| 327 | |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 328 | 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 Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 334 | test_and_set_bit_lock(0, &b->up); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 335 | |
Jon Paul Maloy | 4e801fa | 2016-04-07 10:09:13 -0400 | [diff] [blame] | 336 | res = tipc_disc_create(net, b, &b->bcast_addr, &skb); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 337 | if (res) { |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 338 | bearer_disable(net, b); |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 339 | pr_warn("Bearer <%s> rejected, discovery object creation failed\n", |
| 340 | name); |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 341 | return -EINVAL; |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 342 | } |
Ying Xue | 3874ccb | 2014-03-27 12:54:33 +0800 | [diff] [blame] | 343 | |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 344 | rcu_assign_pointer(tn->bearer_list[bearer_id], b); |
Jon Paul Maloy | 4e801fa | 2016-04-07 10:09:13 -0400 | [diff] [blame] | 345 | if (skb) |
| 346 | tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr); |
Jon Paul Maloy | 35c55c9 | 2016-06-13 20:46:22 -0400 | [diff] [blame] | 347 | |
| 348 | if (tipc_mon_create(net, bearer_id)) |
| 349 | return -ENOMEM; |
| 350 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 351 | pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
| 352 | name, |
| 353 | tipc_addr_string_fill(addr_string, disc_domain), priority); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 354 | return res; |
| 355 | } |
| 356 | |
| 357 | /** |
Erik Hugne | 512137e | 2013-12-06 10:08:00 -0500 | [diff] [blame] | 358 | * tipc_reset_bearer - Reset all links established over this bearer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 359 | */ |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 360 | static int tipc_reset_bearer(struct net *net, struct tipc_bearer *b) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 361 | { |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 362 | pr_info("Resetting bearer <%s>\n", b->name); |
| 363 | tipc_node_delete_links(net, b->identity); |
| 364 | tipc_disc_reset(net, b); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 365 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 366 | } |
| 367 | |
Jon Paul Maloy | 1fc07f3 | 2016-07-11 16:08:37 -0400 | [diff] [blame] | 368 | /* tipc_bearer_reset_all - reset all links on all bearers |
| 369 | */ |
| 370 | void tipc_bearer_reset_all(struct net *net) |
| 371 | { |
Jon Paul Maloy | 1fc07f3 | 2016-07-11 16:08:37 -0400 | [diff] [blame] | 372 | struct tipc_bearer *b; |
| 373 | int i; |
| 374 | |
| 375 | for (i = 0; i < MAX_BEARERS; i++) { |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 376 | 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 Maloy | 1fc07f3 | 2016-07-11 16:08:37 -0400 | [diff] [blame] | 382 | if (b) |
| 383 | tipc_reset_bearer(net, b); |
| 384 | } |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 385 | 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 Maloy | 1fc07f3 | 2016-07-11 16:08:37 -0400 | [diff] [blame] | 390 | } |
| 391 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 392 | /** |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 393 | * bearer_disable |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 394 | * |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 395 | * Note: This routine assumes caller holds RTNL lock. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 396 | */ |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 397 | static void bearer_disable(struct net *net, struct tipc_bearer *b) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 398 | { |
Jon Paul Maloy | 5b7066c | 2016-04-07 10:09:14 -0400 | [diff] [blame] | 399 | struct tipc_net *tn = tipc_net(net); |
| 400 | int bearer_id = b->identity; |
Ying Xue | 3874ccb | 2014-03-27 12:54:33 +0800 | [diff] [blame] | 401 | |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 402 | pr_info("Disabling bearer <%s>\n", b->name); |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 403 | clear_bit_unlock(0, &b->up); |
Jon Paul Maloy | 5b7066c | 2016-04-07 10:09:14 -0400 | [diff] [blame] | 404 | tipc_node_delete_links(net, bearer_id); |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 405 | b->media->disable_media(b); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 406 | RCU_INIT_POINTER(b->media_ptr, NULL); |
| 407 | if (b->link_req) |
| 408 | tipc_disc_delete(b->link_req); |
Jon Paul Maloy | 5b7066c | 2016-04-07 10:09:14 -0400 | [diff] [blame] | 409 | RCU_INIT_POINTER(tn->bearer_list[bearer_id], NULL); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 410 | kfree_rcu(b, rcu); |
Jon Paul Maloy | 35c55c9 | 2016-06-13 20:46:22 -0400 | [diff] [blame] | 411 | tipc_mon_delete(net, bearer_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 412 | } |
| 413 | |
Erik Hugne | d0f9193 | 2015-03-05 10:23:49 +0100 | [diff] [blame] | 414 | int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, |
| 415 | struct nlattr *attr[]) |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 416 | { |
| 417 | struct net_device *dev; |
| 418 | char *driver_name = strchr((const char *)b->name, ':') + 1; |
| 419 | |
| 420 | /* Find device with specified name */ |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 421 | dev = dev_get_by_name(net, driver_name); |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 422 | if (!dev) |
| 423 | return -ENODEV; |
Michal Kubeček | 3de81b7 | 2016-12-02 09:33:41 +0100 | [diff] [blame] | 424 | if (tipc_mtu_bad(dev, 0)) { |
| 425 | dev_put(dev); |
| 426 | return -EINVAL; |
| 427 | } |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 428 | |
Jon Paul Maloy | 38504c2 | 2014-05-14 05:39:13 -0400 | [diff] [blame] | 429 | /* Associate TIPC bearer with L2 bearer */ |
Ying Xue | 2231c5a | 2014-04-21 10:55:47 +0800 | [diff] [blame] | 430 | rcu_assign_pointer(b->media_ptr, dev); |
Jon Paul Maloy | 38504c2 | 2014-05-14 05:39:13 -0400 | [diff] [blame] | 431 | memset(&b->bcast_addr, 0, sizeof(b->bcast_addr)); |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 432 | 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 Maloy | 38504c2 | 2014-05-14 05:39:13 -0400 | [diff] [blame] | 436 | b->media->raw2addr(b, &b->addr, (char *)dev->dev_addr); |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 437 | rcu_assign_pointer(dev->tipc_ptr, b); |
| 438 | return 0; |
| 439 | } |
| 440 | |
Jon Paul Maloy | 38504c2 | 2014-05-14 05:39:13 -0400 | [diff] [blame] | 441 | /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 442 | * |
Jon Paul Maloy | 282b3a0 | 2015-10-15 14:52:45 -0400 | [diff] [blame] | 443 | * Mark L2 bearer as inactive so that incoming buffers are thrown away |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 444 | */ |
| 445 | void tipc_disable_l2_media(struct tipc_bearer *b) |
| 446 | { |
Ying Xue | 2231c5a | 2014-04-21 10:55:47 +0800 | [diff] [blame] | 447 | struct net_device *dev; |
| 448 | |
| 449 | dev = (struct net_device *)rtnl_dereference(b->media_ptr); |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 450 | RCU_INIT_POINTER(dev->tipc_ptr, NULL); |
Ying Xue | f1c8d8c | 2014-04-21 10:55:49 +0800 | [diff] [blame] | 451 | synchronize_net(); |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 452 | dev_put(dev); |
| 453 | } |
| 454 | |
| 455 | /** |
Jon Paul Maloy | 38504c2 | 2014-05-14 05:39:13 -0400 | [diff] [blame] | 456 | * tipc_l2_send_msg - send a TIPC packet out over an L2 interface |
Jon Paul Maloy | 5b7066c | 2016-04-07 10:09:14 -0400 | [diff] [blame] | 457 | * @skb: the packet to be sent |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 458 | * @b: the bearer through which the packet is to be sent |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 459 | * @dest: peer destination address |
| 460 | */ |
Jon Paul Maloy | 7214bcf | 2015-10-22 08:51:45 -0400 | [diff] [blame] | 461 | int tipc_l2_send_msg(struct net *net, struct sk_buff *skb, |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 462 | struct tipc_bearer *b, struct tipc_media_addr *dest) |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 463 | { |
Ying Xue | 2231c5a | 2014-04-21 10:55:47 +0800 | [diff] [blame] | 464 | struct net_device *dev; |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 465 | int delta; |
Ying Xue | 2231c5a | 2014-04-21 10:55:47 +0800 | [diff] [blame] | 466 | |
| 467 | dev = (struct net_device *)rcu_dereference_rtnl(b->media_ptr); |
| 468 | if (!dev) |
| 469 | return 0; |
Ying Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 470 | |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 471 | 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 Maloy | 7214bcf | 2015-10-22 08:51:45 -0400 | [diff] [blame] | 476 | 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 Xue | e4d050c | 2013-12-10 20:45:43 -0800 | [diff] [blame] | 482 | return 0; |
| 483 | } |
| 484 | |
Jon Paul Maloy | 959e178 | 2015-10-22 08:51:43 -0400 | [diff] [blame] | 485 | int 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 Maloy | 60852d6 | 2015-10-22 08:51:44 -0400 | [diff] [blame] | 498 | /* tipc_bearer_xmit_skb - sends buffer to destination over bearer |
| 499 | */ |
| 500 | void tipc_bearer_xmit_skb(struct net *net, u32 bearer_id, |
| 501 | struct sk_buff *skb, |
| 502 | struct tipc_media_addr *dest) |
| 503 | { |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 504 | struct tipc_msg *hdr = buf_msg(skb); |
Jon Paul Maloy | 60852d6 | 2015-10-22 08:51:44 -0400 | [diff] [blame] | 505 | struct tipc_bearer *b; |
| 506 | |
| 507 | rcu_read_lock(); |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 508 | b = bearer_get(net, bearer_id); |
| 509 | if (likely(b && (test_bit(0, &b->up) || msg_is_reset(hdr)))) |
Jon Paul Maloy | 60852d6 | 2015-10-22 08:51:44 -0400 | [diff] [blame] | 510 | b->media->send_msg(net, skb, b, dest); |
Jon Paul Maloy | 4e801fa | 2016-04-07 10:09:13 -0400 | [diff] [blame] | 511 | else |
| 512 | kfree_skb(skb); |
Jon Paul Maloy | 60852d6 | 2015-10-22 08:51:44 -0400 | [diff] [blame] | 513 | rcu_read_unlock(); |
Jon Paul Maloy | 60852d6 | 2015-10-22 08:51:44 -0400 | [diff] [blame] | 514 | } |
| 515 | |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 516 | /* tipc_bearer_xmit() -send buffer to destination over bearer |
| 517 | */ |
| 518 | void tipc_bearer_xmit(struct net *net, u32 bearer_id, |
| 519 | struct sk_buff_head *xmitq, |
| 520 | struct tipc_media_addr *dst) |
| 521 | { |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 522 | 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 Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 529 | b = bearer_get(net, bearer_id); |
Jon Paul Maloy | 4e801fa | 2016-04-07 10:09:13 -0400 | [diff] [blame] | 530 | if (unlikely(!b)) |
| 531 | __skb_queue_purge(xmitq); |
| 532 | skb_queue_walk_safe(xmitq, skb, tmp) { |
| 533 | __skb_dequeue(xmitq); |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 534 | 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 Yongjun | 5128b18 | 2016-08-23 23:01:02 +0000 | [diff] [blame] | 537 | kfree_skb(skb); |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 538 | } |
| 539 | rcu_read_unlock(); |
| 540 | } |
| 541 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 542 | /* tipc_bearer_bc_xmit() - broadcast buffers to all destinations |
| 543 | */ |
| 544 | void 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 Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 554 | b = bearer_get(net, bearer_id); |
| 555 | if (unlikely(!b || !test_bit(0, &b->up))) |
Jon Paul Maloy | 4e801fa | 2016-04-07 10:09:13 -0400 | [diff] [blame] | 556 | __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 Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 563 | } |
| 564 | rcu_read_unlock(); |
| 565 | } |
| 566 | |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 567 | /** |
| 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 Maloy | 4e801fa | 2016-04-07 10:09:13 -0400 | [diff] [blame] | 578 | static int tipc_l2_rcv_msg(struct sk_buff *skb, struct net_device *dev, |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 579 | struct packet_type *pt, struct net_device *orig_dev) |
| 580 | { |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 581 | struct tipc_bearer *b; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 582 | |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 583 | rcu_read_lock(); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 584 | b = rcu_dereference_rtnl(dev->tipc_ptr); |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 585 | if (likely(b && test_bit(0, &b->up) && |
| 586 | (skb->pkt_type <= PACKET_BROADCAST))) { |
Jon Paul Maloy | 4e801fa | 2016-04-07 10:09:13 -0400 | [diff] [blame] | 587 | skb->next = NULL; |
| 588 | tipc_rcv(dev_net(dev), skb, b); |
| 589 | rcu_read_unlock(); |
| 590 | return NET_RX_SUCCESS; |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 591 | } |
| 592 | rcu_read_unlock(); |
Jon Paul Maloy | 4e801fa | 2016-04-07 10:09:13 -0400 | [diff] [blame] | 593 | kfree_skb(skb); |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 594 | 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 | */ |
| 606 | static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt, |
| 607 | void *ptr) |
| 608 | { |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 609 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 610 | struct net *net = dev_net(dev); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 611 | struct tipc_bearer *b; |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 612 | |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 613 | b = rtnl_dereference(dev->tipc_ptr); |
| 614 | if (!b) |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 615 | return NOTIFY_DONE; |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 616 | |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 617 | switch (evt) { |
| 618 | case NETDEV_CHANGE: |
| 619 | if (netif_carrier_ok(dev)) |
| 620 | break; |
Jon Paul Maloy | 5b7066c | 2016-04-07 10:09:14 -0400 | [diff] [blame] | 621 | case NETDEV_UP: |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 622 | test_and_set_bit_lock(0, &b->up); |
Jon Paul Maloy | 5b7066c | 2016-04-07 10:09:14 -0400 | [diff] [blame] | 623 | break; |
Jon Paul Maloy | 282b3a0 | 2015-10-15 14:52:45 -0400 | [diff] [blame] | 624 | case NETDEV_GOING_DOWN: |
Jon Paul Maloy | 0d051bf | 2016-08-16 11:53:50 -0400 | [diff] [blame] | 625 | clear_bit_unlock(0, &b->up); |
Jon Paul Maloy | 5b7066c | 2016-04-07 10:09:14 -0400 | [diff] [blame] | 626 | tipc_reset_bearer(net, b); |
| 627 | break; |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 628 | case NETDEV_CHANGEMTU: |
Michal Kubeček | 3de81b7 | 2016-12-02 09:33:41 +0100 | [diff] [blame] | 629 | if (tipc_mtu_bad(dev, 0)) { |
| 630 | bearer_disable(net, b); |
| 631 | break; |
| 632 | } |
| 633 | b->mtu = dev->mtu; |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 634 | tipc_reset_bearer(net, b); |
Erik Hugne | a21a584 | 2014-03-28 10:32:08 +0100 | [diff] [blame] | 635 | break; |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 636 | case NETDEV_CHANGEADDR: |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 637 | b->media->raw2addr(b, &b->addr, |
Jon Paul Maloy | 5b7066c | 2016-04-07 10:09:14 -0400 | [diff] [blame] | 638 | (char *)dev->dev_addr); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 639 | tipc_reset_bearer(net, b); |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 640 | break; |
| 641 | case NETDEV_UNREGISTER: |
| 642 | case NETDEV_CHANGENAME: |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 643 | bearer_disable(dev_net(dev), b); |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 644 | break; |
| 645 | } |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 646 | return NOTIFY_OK; |
| 647 | } |
| 648 | |
| 649 | static struct packet_type tipc_packet_type __read_mostly = { |
Joe Perches | 184593c | 2014-03-12 10:04:20 -0700 | [diff] [blame] | 650 | .type = htons(ETH_P_TIPC), |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 651 | .func = tipc_l2_rcv_msg, |
| 652 | }; |
| 653 | |
| 654 | static struct notifier_block notifier = { |
| 655 | .notifier_call = tipc_l2_device_event, |
| 656 | .priority = 0, |
| 657 | }; |
| 658 | |
| 659 | int tipc_bearer_setup(void) |
| 660 | { |
Ying Xue | 970122f | 2014-02-20 11:32:50 +0800 | [diff] [blame] | 661 | int err; |
| 662 | |
| 663 | err = register_netdevice_notifier(¬ifier); |
| 664 | if (err) |
| 665 | return err; |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 666 | dev_add_pack(&tipc_packet_type); |
Ying Xue | 970122f | 2014-02-20 11:32:50 +0800 | [diff] [blame] | 667 | return 0; |
Ying Xue | 6e967ad | 2013-12-10 20:45:42 -0800 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | void tipc_bearer_cleanup(void) |
| 671 | { |
| 672 | unregister_netdevice_notifier(¬ifier); |
| 673 | dev_remove_pack(&tipc_packet_type); |
| 674 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 675 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 676 | void tipc_bearer_stop(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 677 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 678 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 679 | struct tipc_bearer *b; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 680 | u32 i; |
| 681 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 682 | for (i = 0; i < MAX_BEARERS; i++) { |
Jon Paul Maloy | 1a90632 | 2015-11-19 14:30:47 -0500 | [diff] [blame] | 683 | b = rtnl_dereference(tn->bearer_list[i]); |
| 684 | if (b) { |
| 685 | bearer_disable(net, b); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 686 | tn->bearer_list[i] = NULL; |
Ying Xue | 3874ccb | 2014-03-27 12:54:33 +0800 | [diff] [blame] | 687 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 688 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 689 | } |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 690 | |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 691 | /* Caller should hold rtnl_lock to protect the bearer */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 692 | static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, |
Nicolas Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 693 | struct tipc_bearer *bearer, int nlflags) |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 694 | { |
| 695 | void *hdr; |
| 696 | struct nlattr *attrs; |
| 697 | struct nlattr *prop; |
| 698 | |
Richard Alpe | bfb3e5d | 2015-02-09 09:50:03 +0100 | [diff] [blame] | 699 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
Nicolas Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 700 | nlflags, TIPC_NL_BEARER_GET); |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 701 | 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 Alpe | fdb3acc | 2016-08-26 10:52:55 +0200 | [diff] [blame] | 722 | |
| 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 Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 730 | nla_nest_end(msg->skb, attrs); |
| 731 | genlmsg_end(msg->skb, hdr); |
| 732 | |
| 733 | return 0; |
| 734 | |
| 735 | prop_msg_full: |
| 736 | nla_nest_cancel(msg->skb, prop); |
| 737 | attr_msg_full: |
| 738 | nla_nest_cancel(msg->skb, attrs); |
| 739 | msg_full: |
| 740 | genlmsg_cancel(msg->skb, hdr); |
| 741 | |
| 742 | return -EMSGSIZE; |
| 743 | } |
| 744 | |
| 745 | int 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 Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 751 | struct net *net = sock_net(skb->sk); |
| 752 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 753 | |
| 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 Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 763 | bearer = rtnl_dereference(tn->bearer_list[i]); |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 764 | if (!bearer) |
| 765 | continue; |
| 766 | |
Nicolas Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 767 | err = __tipc_nl_add_bearer(&msg, bearer, NLM_F_MULTI); |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 768 | if (err) |
| 769 | break; |
| 770 | } |
| 771 | rtnl_unlock(); |
| 772 | |
| 773 | cb->args[0] = i; |
| 774 | return skb->len; |
| 775 | } |
| 776 | |
| 777 | int 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 Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 785 | struct net *net = genl_info_net(info); |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 786 | |
| 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 Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 809 | bearer = tipc_bearer_find(net, name); |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 810 | if (!bearer) { |
| 811 | err = -EINVAL; |
| 812 | goto err_out; |
| 813 | } |
| 814 | |
Nicolas Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 815 | err = __tipc_nl_add_bearer(&msg, bearer, 0); |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 816 | if (err) |
| 817 | goto err_out; |
| 818 | rtnl_unlock(); |
| 819 | |
| 820 | return genlmsg_reply(rep, info); |
| 821 | err_out: |
| 822 | rtnl_unlock(); |
| 823 | nlmsg_free(rep); |
| 824 | |
| 825 | return err; |
| 826 | } |
| 827 | |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 828 | int 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 Alpe | 9ab1546 | 2015-02-09 09:50:05 +0100 | [diff] [blame] | 834 | struct net *net = sock_net(skb->sk); |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 835 | |
| 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 Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 851 | bearer = tipc_bearer_find(net, name); |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 852 | if (!bearer) { |
| 853 | rtnl_unlock(); |
| 854 | return -EINVAL; |
| 855 | } |
| 856 | |
Jon Paul Maloy | b1c29f6 | 2015-05-14 10:46:11 -0400 | [diff] [blame] | 857 | bearer_disable(net, bearer); |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 858 | rtnl_unlock(); |
| 859 | |
| 860 | return 0; |
| 861 | } |
| 862 | |
| 863 | int 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 Alpe | 9ab1546 | 2015-02-09 09:50:05 +0100 | [diff] [blame] | 868 | struct net *net = sock_net(skb->sk); |
| 869 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 870 | u32 domain; |
| 871 | u32 prio; |
| 872 | |
| 873 | prio = TIPC_MEDIA_LINK_PRI; |
Parthasarathy Bhuvaragan | 9ff26e9 | 2016-07-26 08:47:18 +0200 | [diff] [blame] | 874 | domain = tn->own_addr & TIPC_ZONE_CLUSTER_MASK; |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 875 | |
| 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 Hugne | d0f9193 | 2015-03-05 10:23:49 +0100 | [diff] [blame] | 906 | err = tipc_enable_bearer(net, bearer, domain, prio, attrs); |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 907 | if (err) { |
| 908 | rtnl_unlock(); |
| 909 | return err; |
| 910 | } |
| 911 | rtnl_unlock(); |
| 912 | |
| 913 | return 0; |
| 914 | } |
Richard Alpe | 315c00b | 2014-11-20 10:29:09 +0100 | [diff] [blame] | 915 | |
Richard Alpe | ef20cd4 | 2016-08-26 10:52:53 +0200 | [diff] [blame] | 916 | int 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 Alpe | 315c00b | 2014-11-20 10:29:09 +0100 | [diff] [blame] | 959 | int 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 Alpe | c3d6fb8 | 2015-05-06 13:58:54 +0200 | [diff] [blame] | 965 | struct net *net = sock_net(skb->sk); |
Richard Alpe | 315c00b | 2014-11-20 10:29:09 +0100 | [diff] [blame] | 966 | |
| 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 Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 981 | b = tipc_bearer_find(net, name); |
Richard Alpe | 315c00b | 2014-11-20 10:29:09 +0100 | [diff] [blame] | 982 | 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 Alpe | 46f15c6 | 2014-11-20 10:29:15 +0100 | [diff] [blame] | 1008 | |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 1009 | static int __tipc_nl_add_media(struct tipc_nl_msg *msg, |
Nicolas Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 1010 | struct tipc_media *media, int nlflags) |
Richard Alpe | 46f15c6 | 2014-11-20 10:29:15 +0100 | [diff] [blame] | 1011 | { |
| 1012 | void *hdr; |
| 1013 | struct nlattr *attrs; |
| 1014 | struct nlattr *prop; |
| 1015 | |
Richard Alpe | bfb3e5d | 2015-02-09 09:50:03 +0100 | [diff] [blame] | 1016 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
Nicolas Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 1017 | nlflags, TIPC_NL_MEDIA_GET); |
Richard Alpe | 46f15c6 | 2014-11-20 10:29:15 +0100 | [diff] [blame] | 1018 | 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 | |
| 1044 | prop_msg_full: |
| 1045 | nla_nest_cancel(msg->skb, prop); |
| 1046 | attr_msg_full: |
| 1047 | nla_nest_cancel(msg->skb, attrs); |
| 1048 | msg_full: |
| 1049 | genlmsg_cancel(msg->skb, hdr); |
| 1050 | |
| 1051 | return -EMSGSIZE; |
| 1052 | } |
| 1053 | |
| 1054 | int 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 Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 1069 | err = __tipc_nl_add_media(&msg, media_info_array[i], |
| 1070 | NLM_F_MULTI); |
Richard Alpe | 46f15c6 | 2014-11-20 10:29:15 +0100 | [diff] [blame] | 1071 | if (err) |
| 1072 | break; |
| 1073 | } |
| 1074 | rtnl_unlock(); |
| 1075 | |
| 1076 | cb->args[0] = i; |
| 1077 | return skb->len; |
| 1078 | } |
| 1079 | |
| 1080 | int 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 Dichtel | f2f6739 | 2015-04-28 18:33:50 +0200 | [diff] [blame] | 1117 | err = __tipc_nl_add_media(&msg, media, 0); |
Richard Alpe | 46f15c6 | 2014-11-20 10:29:15 +0100 | [diff] [blame] | 1118 | if (err) |
| 1119 | goto err_out; |
| 1120 | rtnl_unlock(); |
| 1121 | |
| 1122 | return genlmsg_reply(rep, info); |
| 1123 | err_out: |
| 1124 | rtnl_unlock(); |
| 1125 | nlmsg_free(rep); |
| 1126 | |
| 1127 | return err; |
| 1128 | } |
Richard Alpe | 1e55417 | 2014-11-20 10:29:16 +0100 | [diff] [blame] | 1129 | |
| 1130 | int 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 | } |