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 | * |
Per Liden | 593a5f2 | 2006-01-11 19:14:19 +0100 | [diff] [blame] | 4 | * Copyright (c) 1996-2006, Ericsson AB |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 5 | * Copyright (c) 2004-2006, 2010-2011, 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 | |
| 37 | #include "core.h" |
| 38 | #include "config.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "bearer.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 40 | #include "discover.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 41 | |
| 42 | #define MAX_ADDR_STR 32 |
| 43 | |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame^] | 44 | static struct tipc_media *media_list[MAX_MEDIA]; |
Allan Stephens | e3ec9c7 | 2010-12-31 18:59:34 +0000 | [diff] [blame] | 45 | static u32 media_count; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 46 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 47 | struct tipc_bearer tipc_bearers[MAX_BEARERS]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 48 | |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 49 | static void bearer_disable(struct tipc_bearer *b_ptr); |
| 50 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 51 | /** |
| 52 | * media_name_valid - validate media name |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 53 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 54 | * Returns 1 if media name is valid, otherwise 0. |
| 55 | */ |
| 56 | |
| 57 | static int media_name_valid(const char *name) |
| 58 | { |
| 59 | u32 len; |
| 60 | |
| 61 | len = strlen(name); |
| 62 | if ((len + 1) > TIPC_MAX_MEDIA_NAME) |
| 63 | return 0; |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 64 | return strspn(name, tipc_alphabet) == len; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | /** |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 68 | * tipc_media_find - locates specified media object by name |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 69 | */ |
| 70 | |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame^] | 71 | struct tipc_media *tipc_media_find(const char *name) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 72 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 73 | u32 i; |
| 74 | |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 75 | for (i = 0; i < media_count; i++) { |
| 76 | if (!strcmp(media_list[i]->name, name)) |
| 77 | return media_list[i]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 78 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 79 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | /** |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 83 | * media_find_id - locates specified media object by type identifier |
| 84 | */ |
| 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 | |
| 90 | for (i = 0; i < media_count; i++) { |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 91 | if (media_list[i]->type_id == type) |
| 92 | return media_list[i]; |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 93 | } |
| 94 | return NULL; |
| 95 | } |
| 96 | |
| 97 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 98 | * tipc_register_media - register a media type |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 99 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 100 | * Bearers for this media type must be activated separately at a later stage. |
| 101 | */ |
| 102 | |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame^] | 103 | int tipc_register_media(struct tipc_media *m_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 104 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 105 | int res = -EINVAL; |
| 106 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 107 | write_lock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 108 | |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 109 | if (!media_name_valid(m_ptr->name)) |
Neil Horman | d0021b2 | 2010-03-03 08:31:23 +0000 | [diff] [blame] | 110 | goto exit; |
Allan Stephens | 3d749a6 | 2011-10-07 15:19:11 -0400 | [diff] [blame] | 111 | if ((m_ptr->bcast_addr.media_id != m_ptr->type_id) || |
| 112 | !m_ptr->bcast_addr.broadcast) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 113 | goto exit; |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 114 | if (m_ptr->priority > TIPC_MAX_LINK_PRI) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 115 | goto exit; |
Allan Stephens | 706767d | 2011-10-06 15:28:44 -0400 | [diff] [blame] | 116 | if ((m_ptr->tolerance < TIPC_MIN_LINK_TOL) || |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 117 | (m_ptr->tolerance > TIPC_MAX_LINK_TOL)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 118 | goto exit; |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 119 | if (media_count >= MAX_MEDIA) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 120 | goto exit; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 121 | if (tipc_media_find(m_ptr->name) || media_find_id(m_ptr->type_id)) |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 122 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 123 | |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 124 | media_list[media_count] = m_ptr; |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 125 | media_count++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 126 | res = 0; |
| 127 | exit: |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 128 | write_unlock_bh(&tipc_net_lock); |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 129 | if (res) |
| 130 | warn("Media <%s> registration error\n", m_ptr->name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 131 | return res; |
| 132 | } |
| 133 | |
| 134 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 135 | * tipc_media_addr_printf - record media address in print buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 136 | */ |
| 137 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 138 | void tipc_media_addr_printf(struct print_buf *pb, struct tipc_media_addr *a) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 139 | { |
Allan Stephens | c61b666 | 2011-10-07 11:31:49 -0400 | [diff] [blame] | 140 | char addr_str[MAX_ADDR_STR]; |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame^] | 141 | struct tipc_media *m_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 142 | |
Allan Stephens | 3d749a6 | 2011-10-07 15:19:11 -0400 | [diff] [blame] | 143 | m_ptr = media_find_id(a->media_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 144 | |
Allan Stephens | c61b666 | 2011-10-07 11:31:49 -0400 | [diff] [blame] | 145 | if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str))) |
| 146 | tipc_printf(pb, "%s(%s)", m_ptr->name, addr_str); |
| 147 | else { |
Allan Stephens | c61b666 | 2011-10-07 11:31:49 -0400 | [diff] [blame] | 148 | u32 i; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 149 | |
Allan Stephens | 3d749a6 | 2011-10-07 15:19:11 -0400 | [diff] [blame] | 150 | tipc_printf(pb, "UNKNOWN(%u)", a->media_id); |
| 151 | for (i = 0; i < sizeof(a->value); i++) |
| 152 | tipc_printf(pb, "-%02x", a->value[i]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 153 | } |
| 154 | } |
| 155 | |
| 156 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 157 | * tipc_media_get_names - record names of registered media in buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 158 | */ |
| 159 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 160 | struct sk_buff *tipc_media_get_names(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 161 | { |
| 162 | struct sk_buff *buf; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 163 | int i; |
| 164 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 165 | buf = tipc_cfg_reply_alloc(MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 166 | if (!buf) |
| 167 | return NULL; |
| 168 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 169 | read_lock_bh(&tipc_net_lock); |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 170 | for (i = 0; i < media_count; i++) { |
| 171 | tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME, |
| 172 | media_list[i]->name, |
| 173 | strlen(media_list[i]->name) + 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 174 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 175 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 176 | return buf; |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * bearer_name_validate - validate & (optionally) deconstruct bearer name |
| 181 | * @name - ptr to bearer name string |
| 182 | * @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] | 183 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 184 | * Returns 1 if bearer name is valid, otherwise 0. |
| 185 | */ |
| 186 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 187 | static int bearer_name_validate(const char *name, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 188 | struct bearer_name *name_parts) |
| 189 | { |
| 190 | char name_copy[TIPC_MAX_BEARER_NAME]; |
| 191 | char *media_name; |
| 192 | char *if_name; |
| 193 | u32 media_len; |
| 194 | u32 if_len; |
| 195 | |
| 196 | /* copy bearer name & ensure length is OK */ |
| 197 | |
| 198 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
| 199 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ |
| 200 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); |
| 201 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) |
| 202 | return 0; |
| 203 | |
| 204 | /* ensure all component parts of bearer name are present */ |
| 205 | |
| 206 | media_name = name_copy; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 207 | if_name = strchr(media_name, ':'); |
| 208 | if (if_name == NULL) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 209 | return 0; |
| 210 | *(if_name++) = 0; |
| 211 | media_len = if_name - media_name; |
| 212 | if_len = strlen(if_name) + 1; |
| 213 | |
| 214 | /* validate component parts of bearer name */ |
| 215 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 216 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
| 217 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME) || |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 218 | (strspn(media_name, tipc_alphabet) != (media_len - 1)) || |
| 219 | (strspn(if_name, tipc_alphabet) != (if_len - 1))) |
| 220 | return 0; |
| 221 | |
| 222 | /* return bearer name components, if necessary */ |
| 223 | |
| 224 | if (name_parts) { |
| 225 | strcpy(name_parts->media_name, media_name); |
| 226 | strcpy(name_parts->if_name, if_name); |
| 227 | } |
| 228 | return 1; |
| 229 | } |
| 230 | |
| 231 | /** |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 232 | * tipc_bearer_find - locates bearer object with matching bearer name |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 233 | */ |
| 234 | |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 235 | struct tipc_bearer *tipc_bearer_find(const char *name) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 236 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 237 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 238 | u32 i; |
| 239 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 240 | for (i = 0, b_ptr = tipc_bearers; i < MAX_BEARERS; i++, b_ptr++) { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 241 | if (b_ptr->active && (!strcmp(b_ptr->name, name))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 242 | return b_ptr; |
| 243 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 244 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 248 | * tipc_bearer_find_interface - locates bearer object with matching interface name |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 249 | */ |
| 250 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 251 | struct tipc_bearer *tipc_bearer_find_interface(const char *if_name) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 252 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 253 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 254 | char *b_if_name; |
| 255 | u32 i; |
| 256 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 257 | for (i = 0, b_ptr = tipc_bearers; i < MAX_BEARERS; i++, b_ptr++) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 258 | if (!b_ptr->active) |
| 259 | continue; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 260 | b_if_name = strchr(b_ptr->name, ':') + 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 261 | if (!strcmp(b_if_name, if_name)) |
| 262 | return b_ptr; |
| 263 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 264 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 268 | * tipc_bearer_get_names - record names of bearers in buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 269 | */ |
| 270 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 271 | struct sk_buff *tipc_bearer_get_names(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 272 | { |
| 273 | struct sk_buff *buf; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 274 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 275 | int i, j; |
| 276 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 277 | buf = tipc_cfg_reply_alloc(MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 278 | if (!buf) |
| 279 | return NULL; |
| 280 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 281 | read_lock_bh(&tipc_net_lock); |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 282 | for (i = 0; i < media_count; i++) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 283 | for (j = 0; j < MAX_BEARERS; j++) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 284 | b_ptr = &tipc_bearers[j]; |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 285 | if (b_ptr->active && (b_ptr->media == media_list[i])) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 286 | tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME, |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 287 | b_ptr->name, |
| 288 | strlen(b_ptr->name) + 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 289 | } |
| 290 | } |
| 291 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 292 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 293 | return buf; |
| 294 | } |
| 295 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 296 | void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 297 | { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 298 | tipc_nmap_add(&b_ptr->nodes, dest); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 299 | tipc_bcbearer_sort(); |
Allan Stephens | 1209966 | 2011-04-21 19:05:25 -0500 | [diff] [blame] | 300 | tipc_disc_add_dest(b_ptr->link_req); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 301 | } |
| 302 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 303 | void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 304 | { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 305 | tipc_nmap_remove(&b_ptr->nodes, dest); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 306 | tipc_bcbearer_sort(); |
Allan Stephens | 1209966 | 2011-04-21 19:05:25 -0500 | [diff] [blame] | 307 | tipc_disc_remove_dest(b_ptr->link_req); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | /* |
| 311 | * bearer_push(): Resolve bearer congestion. Force the waiting |
| 312 | * links to push out their unsent packets, one packet per link |
| 313 | * per iteration, until all packets are gone or congestion reoccurs. |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 314 | * 'tipc_net_lock' is read_locked when this function is called |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 315 | * bearer.lock must be taken before calling |
| 316 | * Returns binary true(1) ore false(0) |
| 317 | */ |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 318 | static int bearer_push(struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 319 | { |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 320 | u32 res = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 321 | struct link *ln, *tln; |
| 322 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 323 | if (b_ptr->blocked) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 324 | return 0; |
| 325 | |
| 326 | while (!list_empty(&b_ptr->cong_links) && (res != PUSH_FAILED)) { |
| 327 | list_for_each_entry_safe(ln, tln, &b_ptr->cong_links, link_list) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 328 | res = tipc_link_push_packet(ln); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 329 | if (res == PUSH_FAILED) |
| 330 | break; |
| 331 | if (res == PUSH_FINISHED) |
| 332 | list_move_tail(&ln->link_list, &b_ptr->links); |
| 333 | } |
| 334 | } |
| 335 | return list_empty(&b_ptr->cong_links); |
| 336 | } |
| 337 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 338 | void tipc_bearer_lock_push(struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 339 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 340 | spin_lock_bh(&b_ptr->lock); |
Allan Stephens | 23f0ff9 | 2011-04-07 11:25:26 -0400 | [diff] [blame] | 341 | bearer_push(b_ptr); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 342 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | |
| 346 | /* |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 347 | * Interrupt enabling new requests after bearer congestion or blocking: |
| 348 | * See bearer_send(). |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 349 | */ |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 350 | void tipc_continue(struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 351 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 352 | spin_lock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 353 | if (!list_empty(&b_ptr->cong_links)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 354 | tipc_k_signal((Handler)tipc_bearer_lock_push, (unsigned long)b_ptr); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 355 | b_ptr->blocked = 0; |
| 356 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | /* |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 360 | * Schedule link for sending of messages after the bearer |
| 361 | * has been deblocked by 'continue()'. This method is called |
| 362 | * when somebody tries to send a message via this link while |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 363 | * the bearer is congested. 'tipc_net_lock' is in read_lock here |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 364 | * bearer.lock is busy |
| 365 | */ |
| 366 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 367 | static void tipc_bearer_schedule_unlocked(struct tipc_bearer *b_ptr, struct link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 368 | { |
| 369 | list_move_tail(&l_ptr->link_list, &b_ptr->cong_links); |
| 370 | } |
| 371 | |
| 372 | /* |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 373 | * Schedule link for sending of messages after the bearer |
| 374 | * has been deblocked by 'continue()'. This method is called |
| 375 | * when somebody tries to send a message via this link while |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 376 | * the bearer is congested. 'tipc_net_lock' is in read_lock here, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 377 | * bearer.lock is free |
| 378 | */ |
| 379 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 380 | void tipc_bearer_schedule(struct tipc_bearer *b_ptr, struct link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 381 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 382 | spin_lock_bh(&b_ptr->lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 383 | tipc_bearer_schedule_unlocked(b_ptr, l_ptr); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 384 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | |
| 388 | /* |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 389 | * tipc_bearer_resolve_congestion(): Check if there is bearer congestion, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 390 | * and if there is, try to resolve it before returning. |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 391 | * 'tipc_net_lock' is read_locked when this function is called |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 392 | */ |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 393 | int tipc_bearer_resolve_congestion(struct tipc_bearer *b_ptr, struct link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 394 | { |
| 395 | int res = 1; |
| 396 | |
| 397 | if (list_empty(&b_ptr->cong_links)) |
| 398 | return 1; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 399 | spin_lock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 400 | if (!bearer_push(b_ptr)) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 401 | tipc_bearer_schedule_unlocked(b_ptr, l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 402 | res = 0; |
| 403 | } |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 404 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 405 | return res; |
| 406 | } |
| 407 | |
Allan Stephens | b274f4a | 2010-05-11 14:30:16 +0000 | [diff] [blame] | 408 | /** |
| 409 | * tipc_bearer_congested - determines if bearer is currently congested |
| 410 | */ |
| 411 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 412 | int tipc_bearer_congested(struct tipc_bearer *b_ptr, struct link *l_ptr) |
Allan Stephens | b274f4a | 2010-05-11 14:30:16 +0000 | [diff] [blame] | 413 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 414 | if (unlikely(b_ptr->blocked)) |
Allan Stephens | b274f4a | 2010-05-11 14:30:16 +0000 | [diff] [blame] | 415 | return 1; |
| 416 | if (likely(list_empty(&b_ptr->cong_links))) |
| 417 | return 0; |
| 418 | return !tipc_bearer_resolve_congestion(b_ptr, l_ptr); |
| 419 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 420 | |
| 421 | /** |
| 422 | * tipc_enable_bearer - enable bearer with the given name |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 423 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 424 | |
Allan Stephens | 50d3e63 | 2011-02-28 14:56:15 -0500 | [diff] [blame] | 425 | int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 426 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 427 | struct tipc_bearer *b_ptr; |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame^] | 428 | struct tipc_media *m_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 429 | struct bearer_name b_name; |
| 430 | char addr_string[16]; |
| 431 | u32 bearer_id; |
| 432 | u32 with_this_prio; |
| 433 | u32 i; |
| 434 | int res = -EINVAL; |
| 435 | |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 436 | if (tipc_mode != TIPC_NET_MODE) { |
| 437 | warn("Bearer <%s> rejected, not supported in standalone mode\n", |
| 438 | name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 439 | return -ENOPROTOOPT; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 440 | } |
| 441 | if (!bearer_name_validate(name, &b_name)) { |
| 442 | warn("Bearer <%s> rejected, illegal name\n", name); |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 443 | return -EINVAL; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 444 | } |
Allan Stephens | 66e019a | 2011-04-20 16:24:07 -0500 | [diff] [blame] | 445 | if (tipc_addr_domain_valid(disc_domain) && |
| 446 | (disc_domain != tipc_own_addr)) { |
| 447 | if (tipc_in_scope(disc_domain, tipc_own_addr)) { |
| 448 | disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK; |
| 449 | res = 0; /* accept any node in own cluster */ |
| 450 | } else if (in_own_cluster(disc_domain)) |
| 451 | res = 0; /* accept specified node in own cluster */ |
| 452 | } |
| 453 | if (res) { |
Allan Stephens | 50d3e63 | 2011-02-28 14:56:15 -0500 | [diff] [blame] | 454 | warn("Bearer <%s> rejected, illegal discovery domain\n", name); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 455 | return -EINVAL; |
| 456 | } |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 457 | if ((priority < TIPC_MIN_LINK_PRI || |
| 458 | priority > TIPC_MAX_LINK_PRI) && |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 459 | (priority != TIPC_MEDIA_LINK_PRI)) { |
| 460 | warn("Bearer <%s> rejected, illegal priority\n", name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 461 | return -EINVAL; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 462 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 463 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 464 | write_lock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 465 | |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 466 | m_ptr = tipc_media_find(b_name.media_name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 467 | if (!m_ptr) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 468 | warn("Bearer <%s> rejected, media <%s> not registered\n", name, |
| 469 | b_name.media_name); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 470 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 471 | } |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 472 | |
| 473 | if (priority == TIPC_MEDIA_LINK_PRI) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 474 | priority = m_ptr->priority; |
| 475 | |
| 476 | restart: |
| 477 | bearer_id = MAX_BEARERS; |
| 478 | with_this_prio = 1; |
| 479 | for (i = MAX_BEARERS; i-- != 0; ) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 480 | if (!tipc_bearers[i].active) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 481 | bearer_id = i; |
| 482 | continue; |
| 483 | } |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 484 | if (!strcmp(name, tipc_bearers[i].name)) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 485 | warn("Bearer <%s> rejected, already enabled\n", name); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 486 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 487 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 488 | if ((tipc_bearers[i].priority == priority) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 489 | (++with_this_prio > 2)) { |
| 490 | if (priority-- == 0) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 491 | warn("Bearer <%s> rejected, duplicate priority\n", |
| 492 | name); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 493 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 494 | } |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 495 | warn("Bearer <%s> priority adjustment required %u->%u\n", |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 496 | name, priority + 1, priority); |
| 497 | goto restart; |
| 498 | } |
| 499 | } |
| 500 | if (bearer_id >= MAX_BEARERS) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 501 | warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 502 | name, MAX_BEARERS); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 503 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 504 | } |
| 505 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 506 | b_ptr = &tipc_bearers[bearer_id]; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 507 | strcpy(b_ptr->name, name); |
| 508 | res = m_ptr->enable_bearer(b_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 509 | if (res) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 510 | warn("Bearer <%s> rejected, enable failure (%d)\n", name, -res); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 511 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | b_ptr->identity = bearer_id; |
| 515 | b_ptr->media = m_ptr; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 516 | b_ptr->tolerance = m_ptr->tolerance; |
| 517 | b_ptr->window = m_ptr->window; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 518 | b_ptr->net_plane = bearer_id + 'A'; |
| 519 | b_ptr->active = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 520 | b_ptr->priority = priority; |
| 521 | INIT_LIST_HEAD(&b_ptr->cong_links); |
| 522 | INIT_LIST_HEAD(&b_ptr->links); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 523 | spin_lock_init(&b_ptr->lock); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 524 | |
| 525 | res = tipc_disc_create(b_ptr, &m_ptr->bcast_addr, disc_domain); |
| 526 | if (res) { |
| 527 | bearer_disable(b_ptr); |
| 528 | warn("Bearer <%s> rejected, discovery object creation failed\n", |
| 529 | name); |
| 530 | goto exit; |
| 531 | } |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 532 | info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
Allan Stephens | 50d3e63 | 2011-02-28 14:56:15 -0500 | [diff] [blame] | 533 | name, tipc_addr_string_fill(addr_string, disc_domain), priority); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 534 | exit: |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 535 | write_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 536 | return res; |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * tipc_block_bearer(): Block the bearer with the given name, |
| 541 | * and reset all its links |
| 542 | */ |
| 543 | |
| 544 | int tipc_block_bearer(const char *name) |
| 545 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 546 | struct tipc_bearer *b_ptr = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 547 | struct link *l_ptr; |
| 548 | struct link *temp_l_ptr; |
| 549 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 550 | read_lock_bh(&tipc_net_lock); |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 551 | b_ptr = tipc_bearer_find(name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 552 | if (!b_ptr) { |
| 553 | warn("Attempt to block unknown bearer <%s>\n", name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 554 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 555 | return -EINVAL; |
| 556 | } |
| 557 | |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 558 | info("Blocking bearer <%s>\n", name); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 559 | spin_lock_bh(&b_ptr->lock); |
| 560 | b_ptr->blocked = 1; |
Allan Stephens | 4b3743e | 2011-05-26 13:59:17 -0400 | [diff] [blame] | 561 | list_splice_init(&b_ptr->cong_links, &b_ptr->links); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 562 | list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) { |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 563 | struct tipc_node *n_ptr = l_ptr->owner; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 564 | |
| 565 | spin_lock_bh(&n_ptr->lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 566 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 567 | spin_unlock_bh(&n_ptr->lock); |
| 568 | } |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 569 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 570 | read_unlock_bh(&tipc_net_lock); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 571 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | /** |
| 575 | * bearer_disable - |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 576 | * |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 577 | * Note: This routine assumes caller holds tipc_net_lock. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 578 | */ |
| 579 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 580 | static void bearer_disable(struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 581 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 582 | struct link *l_ptr; |
| 583 | struct link *temp_l_ptr; |
| 584 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 585 | info("Disabling bearer <%s>\n", b_ptr->name); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 586 | spin_lock_bh(&b_ptr->lock); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 587 | b_ptr->blocked = 1; |
| 588 | b_ptr->media->disable_bearer(b_ptr); |
Allan Stephens | 4b3743e | 2011-05-26 13:59:17 -0400 | [diff] [blame] | 589 | list_splice_init(&b_ptr->cong_links, &b_ptr->links); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 590 | list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 591 | tipc_link_delete(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 592 | } |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 593 | if (b_ptr->link_req) |
| 594 | tipc_disc_delete(b_ptr->link_req); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 595 | spin_unlock_bh(&b_ptr->lock); |
| 596 | memset(b_ptr, 0, sizeof(struct tipc_bearer)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | int tipc_disable_bearer(const char *name) |
| 600 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 601 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 602 | int res; |
| 603 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 604 | write_lock_bh(&tipc_net_lock); |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 605 | b_ptr = tipc_bearer_find(name); |
Allan Stephens | ccc901e | 2010-10-14 13:58:26 +0000 | [diff] [blame] | 606 | if (b_ptr == NULL) { |
| 607 | warn("Attempt to disable unknown bearer <%s>\n", name); |
| 608 | res = -EINVAL; |
Allan Stephens | 28cc937 | 2010-11-30 12:00:56 +0000 | [diff] [blame] | 609 | } else { |
| 610 | bearer_disable(b_ptr); |
| 611 | res = 0; |
| 612 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 613 | write_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 614 | return res; |
| 615 | } |
| 616 | |
| 617 | |
| 618 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 619 | void tipc_bearer_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 620 | { |
| 621 | u32 i; |
| 622 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 623 | for (i = 0; i < MAX_BEARERS; i++) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 624 | if (tipc_bearers[i].active) |
Allan Stephens | ccc901e | 2010-10-14 13:58:26 +0000 | [diff] [blame] | 625 | bearer_disable(&tipc_bearers[i]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 626 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 627 | media_count = 0; |
| 628 | } |