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 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 56 | static int media_name_valid(const char *name) |
| 57 | { |
| 58 | u32 len; |
| 59 | |
| 60 | len = strlen(name); |
| 61 | if ((len + 1) > TIPC_MAX_MEDIA_NAME) |
| 62 | return 0; |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 63 | return strspn(name, tipc_alphabet) == len; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | /** |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 67 | * tipc_media_find - locates specified media object by name |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 68 | */ |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame] | 69 | struct tipc_media *tipc_media_find(const char *name) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 70 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 71 | u32 i; |
| 72 | |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 73 | for (i = 0; i < media_count; i++) { |
| 74 | if (!strcmp(media_list[i]->name, name)) |
| 75 | return media_list[i]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 76 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 77 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | /** |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 81 | * media_find_id - locates specified media object by type identifier |
| 82 | */ |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame] | 83 | static struct tipc_media *media_find_id(u8 type) |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 84 | { |
| 85 | u32 i; |
| 86 | |
| 87 | for (i = 0; i < media_count; i++) { |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 88 | if (media_list[i]->type_id == type) |
| 89 | return media_list[i]; |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 90 | } |
| 91 | return NULL; |
| 92 | } |
| 93 | |
| 94 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 95 | * tipc_register_media - register a media type |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 96 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 97 | * Bearers for this media type must be activated separately at a later stage. |
| 98 | */ |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame] | 99 | int tipc_register_media(struct tipc_media *m_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 100 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 101 | int res = -EINVAL; |
| 102 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 103 | write_lock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 104 | |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 105 | if (!media_name_valid(m_ptr->name)) |
Neil Horman | d0021b2 | 2010-03-03 08:31:23 +0000 | [diff] [blame] | 106 | goto exit; |
Allan Stephens | 3d749a6 | 2011-10-07 15:19:11 -0400 | [diff] [blame] | 107 | if ((m_ptr->bcast_addr.media_id != m_ptr->type_id) || |
| 108 | !m_ptr->bcast_addr.broadcast) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 109 | goto exit; |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 110 | if (m_ptr->priority > TIPC_MAX_LINK_PRI) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 111 | goto exit; |
Allan Stephens | 706767d | 2011-10-06 15:28:44 -0400 | [diff] [blame] | 112 | if ((m_ptr->tolerance < TIPC_MIN_LINK_TOL) || |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 113 | (m_ptr->tolerance > TIPC_MAX_LINK_TOL)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 114 | goto exit; |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 115 | if (media_count >= MAX_MEDIA) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 116 | goto exit; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 117 | 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] | 118 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 119 | |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 120 | media_list[media_count] = m_ptr; |
Allan Stephens | c79be45 | 2011-10-06 16:40:55 -0400 | [diff] [blame] | 121 | media_count++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 122 | res = 0; |
| 123 | exit: |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 124 | write_unlock_bh(&tipc_net_lock); |
Allan Stephens | 6c34921 | 2011-10-07 09:54:44 -0400 | [diff] [blame] | 125 | if (res) |
| 126 | warn("Media <%s> registration error\n", m_ptr->name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 127 | return res; |
| 128 | } |
| 129 | |
| 130 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 131 | * tipc_media_addr_printf - record media address in print buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 132 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 133 | 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] | 134 | { |
Allan Stephens | c61b666 | 2011-10-07 11:31:49 -0400 | [diff] [blame] | 135 | char addr_str[MAX_ADDR_STR]; |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame] | 136 | struct tipc_media *m_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 137 | |
Allan Stephens | 3d749a6 | 2011-10-07 15:19:11 -0400 | [diff] [blame] | 138 | m_ptr = media_find_id(a->media_id); |
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 | if (m_ptr && !m_ptr->addr2str(a, addr_str, sizeof(addr_str))) |
| 141 | tipc_printf(pb, "%s(%s)", m_ptr->name, addr_str); |
| 142 | else { |
Allan Stephens | c61b666 | 2011-10-07 11:31:49 -0400 | [diff] [blame] | 143 | u32 i; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 144 | |
Allan Stephens | 3d749a6 | 2011-10-07 15:19:11 -0400 | [diff] [blame] | 145 | tipc_printf(pb, "UNKNOWN(%u)", a->media_id); |
| 146 | for (i = 0; i < sizeof(a->value); i++) |
| 147 | tipc_printf(pb, "-%02x", a->value[i]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 148 | } |
| 149 | } |
| 150 | |
| 151 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 152 | * tipc_media_get_names - record names of registered media in buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 153 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 154 | struct sk_buff *tipc_media_get_names(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 155 | { |
| 156 | struct sk_buff *buf; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 157 | int i; |
| 158 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 159 | 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] | 160 | if (!buf) |
| 161 | return NULL; |
| 162 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 163 | read_lock_bh(&tipc_net_lock); |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 164 | for (i = 0; i < media_count; i++) { |
| 165 | tipc_cfg_append_tlv(buf, TIPC_TLV_MEDIA_NAME, |
| 166 | media_list[i]->name, |
| 167 | strlen(media_list[i]->name) + 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 168 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 169 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 170 | return buf; |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * bearer_name_validate - validate & (optionally) deconstruct bearer name |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 175 | * @name: ptr to bearer name string |
| 176 | * @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] | 177 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 178 | * Returns 1 if bearer name is valid, otherwise 0. |
| 179 | */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 180 | static int bearer_name_validate(const char *name, |
Paul Gortmaker | f19765f | 2011-12-29 21:39:49 -0500 | [diff] [blame] | 181 | struct tipc_bearer_names *name_parts) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 182 | { |
| 183 | char name_copy[TIPC_MAX_BEARER_NAME]; |
| 184 | char *media_name; |
| 185 | char *if_name; |
| 186 | u32 media_len; |
| 187 | u32 if_len; |
| 188 | |
| 189 | /* copy bearer name & ensure length is OK */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 190 | name_copy[TIPC_MAX_BEARER_NAME - 1] = 0; |
| 191 | /* need above in case non-Posix strncpy() doesn't pad with nulls */ |
| 192 | strncpy(name_copy, name, TIPC_MAX_BEARER_NAME); |
| 193 | if (name_copy[TIPC_MAX_BEARER_NAME - 1] != 0) |
| 194 | return 0; |
| 195 | |
| 196 | /* ensure all component parts of bearer name are present */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 197 | media_name = name_copy; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 198 | if_name = strchr(media_name, ':'); |
| 199 | if (if_name == NULL) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 200 | return 0; |
| 201 | *(if_name++) = 0; |
| 202 | media_len = if_name - media_name; |
| 203 | if_len = strlen(if_name) + 1; |
| 204 | |
| 205 | /* validate component parts of bearer name */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 206 | if ((media_len <= 1) || (media_len > TIPC_MAX_MEDIA_NAME) || |
| 207 | (if_len <= 1) || (if_len > TIPC_MAX_IF_NAME) || |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 208 | (strspn(media_name, tipc_alphabet) != (media_len - 1)) || |
| 209 | (strspn(if_name, tipc_alphabet) != (if_len - 1))) |
| 210 | return 0; |
| 211 | |
| 212 | /* return bearer name components, if necessary */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 213 | if (name_parts) { |
| 214 | strcpy(name_parts->media_name, media_name); |
| 215 | strcpy(name_parts->if_name, if_name); |
| 216 | } |
| 217 | return 1; |
| 218 | } |
| 219 | |
| 220 | /** |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 221 | * tipc_bearer_find - locates bearer object with matching bearer name |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 222 | */ |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 223 | struct tipc_bearer *tipc_bearer_find(const char *name) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 224 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 225 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 226 | u32 i; |
| 227 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 228 | 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] | 229 | if (b_ptr->active && (!strcmp(b_ptr->name, name))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 230 | return b_ptr; |
| 231 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 232 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 236 | * tipc_bearer_find_interface - locates bearer object with matching interface name |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 237 | */ |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 238 | struct tipc_bearer *tipc_bearer_find_interface(const char *if_name) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 239 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 240 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 241 | char *b_if_name; |
| 242 | u32 i; |
| 243 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 244 | 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] | 245 | if (!b_ptr->active) |
| 246 | continue; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 247 | b_if_name = strchr(b_ptr->name, ':') + 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 248 | if (!strcmp(b_if_name, if_name)) |
| 249 | return b_ptr; |
| 250 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 251 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 255 | * tipc_bearer_get_names - record names of bearers in buffer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 256 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 257 | struct sk_buff *tipc_bearer_get_names(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 258 | { |
| 259 | struct sk_buff *buf; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 260 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 261 | int i, j; |
| 262 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 263 | 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] | 264 | if (!buf) |
| 265 | return NULL; |
| 266 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 267 | read_lock_bh(&tipc_net_lock); |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 268 | for (i = 0; i < media_count; i++) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 269 | for (j = 0; j < MAX_BEARERS; j++) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 270 | b_ptr = &tipc_bearers[j]; |
Allan Stephens | a31abe8 | 2011-10-07 09:25:12 -0400 | [diff] [blame] | 271 | if (b_ptr->active && (b_ptr->media == media_list[i])) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 272 | tipc_cfg_append_tlv(buf, TIPC_TLV_BEARER_NAME, |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 273 | b_ptr->name, |
| 274 | strlen(b_ptr->name) + 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 275 | } |
| 276 | } |
| 277 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 278 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 279 | return buf; |
| 280 | } |
| 281 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 282 | void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 283 | { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 284 | tipc_nmap_add(&b_ptr->nodes, dest); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 285 | tipc_bcbearer_sort(); |
Allan Stephens | 1209966 | 2011-04-21 19:05:25 -0500 | [diff] [blame] | 286 | tipc_disc_add_dest(b_ptr->link_req); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 287 | } |
| 288 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 289 | void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 290 | { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 291 | tipc_nmap_remove(&b_ptr->nodes, dest); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 292 | tipc_bcbearer_sort(); |
Allan Stephens | 1209966 | 2011-04-21 19:05:25 -0500 | [diff] [blame] | 293 | tipc_disc_remove_dest(b_ptr->link_req); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | /* |
| 297 | * bearer_push(): Resolve bearer congestion. Force the waiting |
| 298 | * links to push out their unsent packets, one packet per link |
| 299 | * per iteration, until all packets are gone or congestion reoccurs. |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 300 | * 'tipc_net_lock' is read_locked when this function is called |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 301 | * bearer.lock must be taken before calling |
| 302 | * Returns binary true(1) ore false(0) |
| 303 | */ |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 304 | static int bearer_push(struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 305 | { |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 306 | u32 res = 0; |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 307 | struct tipc_link *ln, *tln; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 308 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 309 | if (b_ptr->blocked) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 310 | return 0; |
| 311 | |
| 312 | while (!list_empty(&b_ptr->cong_links) && (res != PUSH_FAILED)) { |
| 313 | 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] | 314 | res = tipc_link_push_packet(ln); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 315 | if (res == PUSH_FAILED) |
| 316 | break; |
| 317 | if (res == PUSH_FINISHED) |
| 318 | list_move_tail(&ln->link_list, &b_ptr->links); |
| 319 | } |
| 320 | } |
| 321 | return list_empty(&b_ptr->cong_links); |
| 322 | } |
| 323 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 324 | void tipc_bearer_lock_push(struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 325 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 326 | spin_lock_bh(&b_ptr->lock); |
Allan Stephens | 23f0ff9 | 2011-04-07 11:25:26 -0400 | [diff] [blame] | 327 | bearer_push(b_ptr); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 328 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 329 | } |
| 330 | |
| 331 | |
| 332 | /* |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 333 | * Interrupt enabling new requests after bearer congestion or blocking: |
| 334 | * See bearer_send(). |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 335 | */ |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 336 | void tipc_continue(struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 337 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 338 | spin_lock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 339 | if (!list_empty(&b_ptr->cong_links)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 340 | tipc_k_signal((Handler)tipc_bearer_lock_push, (unsigned long)b_ptr); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 341 | b_ptr->blocked = 0; |
| 342 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | /* |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 346 | * Schedule link for sending of messages after the bearer |
| 347 | * has been deblocked by 'continue()'. This method is called |
| 348 | * when somebody tries to send a message via this link while |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 349 | * the bearer is congested. 'tipc_net_lock' is in read_lock here |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 350 | * bearer.lock is busy |
| 351 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 352 | static void tipc_bearer_schedule_unlocked(struct tipc_bearer *b_ptr, |
| 353 | struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 354 | { |
| 355 | list_move_tail(&l_ptr->link_list, &b_ptr->cong_links); |
| 356 | } |
| 357 | |
| 358 | /* |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 359 | * Schedule link for sending of messages after the bearer |
| 360 | * has been deblocked by 'continue()'. This method is called |
| 361 | * when somebody tries to send a message via this link while |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 362 | * the bearer is congested. 'tipc_net_lock' is in read_lock here, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 363 | * bearer.lock is free |
| 364 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 365 | void tipc_bearer_schedule(struct tipc_bearer *b_ptr, struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 366 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 367 | spin_lock_bh(&b_ptr->lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 368 | tipc_bearer_schedule_unlocked(b_ptr, l_ptr); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 369 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 370 | } |
| 371 | |
| 372 | |
| 373 | /* |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 374 | * tipc_bearer_resolve_congestion(): Check if there is bearer congestion, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 375 | * and if there is, try to resolve it before returning. |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 376 | * 'tipc_net_lock' is read_locked when this function is called |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 377 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 378 | int tipc_bearer_resolve_congestion(struct tipc_bearer *b_ptr, |
| 379 | struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 380 | { |
| 381 | int res = 1; |
| 382 | |
| 383 | if (list_empty(&b_ptr->cong_links)) |
| 384 | return 1; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 385 | spin_lock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 386 | if (!bearer_push(b_ptr)) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 387 | tipc_bearer_schedule_unlocked(b_ptr, l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 388 | res = 0; |
| 389 | } |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 390 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 391 | return res; |
| 392 | } |
| 393 | |
Allan Stephens | b274f4a | 2010-05-11 14:30:16 +0000 | [diff] [blame] | 394 | /** |
| 395 | * tipc_bearer_congested - determines if bearer is currently congested |
| 396 | */ |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 397 | int tipc_bearer_congested(struct tipc_bearer *b_ptr, struct tipc_link *l_ptr) |
Allan Stephens | b274f4a | 2010-05-11 14:30:16 +0000 | [diff] [blame] | 398 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 399 | if (unlikely(b_ptr->blocked)) |
Allan Stephens | b274f4a | 2010-05-11 14:30:16 +0000 | [diff] [blame] | 400 | return 1; |
| 401 | if (likely(list_empty(&b_ptr->cong_links))) |
| 402 | return 0; |
| 403 | return !tipc_bearer_resolve_congestion(b_ptr, l_ptr); |
| 404 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 405 | |
| 406 | /** |
| 407 | * tipc_enable_bearer - enable bearer with the given name |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 408 | */ |
Allan Stephens | 50d3e63 | 2011-02-28 14:56:15 -0500 | [diff] [blame] | 409 | int tipc_enable_bearer(const char *name, u32 disc_domain, u32 priority) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 410 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 411 | struct tipc_bearer *b_ptr; |
Paul Gortmaker | 358a0d1 | 2011-12-29 20:19:42 -0500 | [diff] [blame] | 412 | struct tipc_media *m_ptr; |
Paul Gortmaker | f19765f | 2011-12-29 21:39:49 -0500 | [diff] [blame] | 413 | struct tipc_bearer_names b_names; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 414 | char addr_string[16]; |
| 415 | u32 bearer_id; |
| 416 | u32 with_this_prio; |
| 417 | u32 i; |
| 418 | int res = -EINVAL; |
| 419 | |
Allan Stephens | b58343f | 2011-11-08 13:48:28 -0500 | [diff] [blame] | 420 | if (!tipc_own_addr) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 421 | warn("Bearer <%s> rejected, not supported in standalone mode\n", |
| 422 | name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 423 | return -ENOPROTOOPT; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 424 | } |
Paul Gortmaker | f19765f | 2011-12-29 21:39:49 -0500 | [diff] [blame] | 425 | if (!bearer_name_validate(name, &b_names)) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 426 | warn("Bearer <%s> rejected, illegal name\n", name); |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 427 | return -EINVAL; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 428 | } |
Allan Stephens | 66e019a | 2011-04-20 16:24:07 -0500 | [diff] [blame] | 429 | if (tipc_addr_domain_valid(disc_domain) && |
| 430 | (disc_domain != tipc_own_addr)) { |
| 431 | if (tipc_in_scope(disc_domain, tipc_own_addr)) { |
| 432 | disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK; |
| 433 | res = 0; /* accept any node in own cluster */ |
Allan Stephens | 336ebf5 | 2012-04-17 18:02:01 -0400 | [diff] [blame] | 434 | } else if (in_own_cluster_exact(disc_domain)) |
Allan Stephens | 66e019a | 2011-04-20 16:24:07 -0500 | [diff] [blame] | 435 | res = 0; /* accept specified node in own cluster */ |
| 436 | } |
| 437 | if (res) { |
Allan Stephens | 50d3e63 | 2011-02-28 14:56:15 -0500 | [diff] [blame] | 438 | warn("Bearer <%s> rejected, illegal discovery domain\n", name); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 439 | return -EINVAL; |
| 440 | } |
Allan Stephens | 9efde4a | 2011-11-03 13:15:10 -0400 | [diff] [blame] | 441 | if ((priority > TIPC_MAX_LINK_PRI) && |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 442 | (priority != TIPC_MEDIA_LINK_PRI)) { |
| 443 | warn("Bearer <%s> rejected, illegal priority\n", name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 444 | return -EINVAL; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 445 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 446 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 447 | write_lock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 448 | |
Paul Gortmaker | f19765f | 2011-12-29 21:39:49 -0500 | [diff] [blame] | 449 | m_ptr = tipc_media_find(b_names.media_name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 450 | if (!m_ptr) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 451 | warn("Bearer <%s> rejected, media <%s> not registered\n", name, |
Paul Gortmaker | f19765f | 2011-12-29 21:39:49 -0500 | [diff] [blame] | 452 | b_names.media_name); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 453 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 454 | } |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 455 | |
| 456 | if (priority == TIPC_MEDIA_LINK_PRI) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 457 | priority = m_ptr->priority; |
| 458 | |
| 459 | restart: |
| 460 | bearer_id = MAX_BEARERS; |
| 461 | with_this_prio = 1; |
| 462 | for (i = MAX_BEARERS; i-- != 0; ) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 463 | if (!tipc_bearers[i].active) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 464 | bearer_id = i; |
| 465 | continue; |
| 466 | } |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 467 | if (!strcmp(name, tipc_bearers[i].name)) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 468 | warn("Bearer <%s> rejected, already enabled\n", name); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 469 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 470 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 471 | if ((tipc_bearers[i].priority == priority) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 472 | (++with_this_prio > 2)) { |
| 473 | if (priority-- == 0) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 474 | warn("Bearer <%s> rejected, duplicate priority\n", |
| 475 | name); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 476 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 477 | } |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 478 | warn("Bearer <%s> priority adjustment required %u->%u\n", |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 479 | name, priority + 1, priority); |
| 480 | goto restart; |
| 481 | } |
| 482 | } |
| 483 | if (bearer_id >= MAX_BEARERS) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 484 | warn("Bearer <%s> rejected, bearer limit reached (%u)\n", |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 485 | name, MAX_BEARERS); |
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 | } |
| 488 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 489 | b_ptr = &tipc_bearers[bearer_id]; |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 490 | strcpy(b_ptr->name, name); |
| 491 | res = m_ptr->enable_bearer(b_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 492 | if (res) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 493 | warn("Bearer <%s> rejected, enable failure (%d)\n", name, -res); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 494 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | b_ptr->identity = bearer_id; |
| 498 | b_ptr->media = m_ptr; |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 499 | b_ptr->tolerance = m_ptr->tolerance; |
| 500 | b_ptr->window = m_ptr->window; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 501 | b_ptr->net_plane = bearer_id + 'A'; |
| 502 | b_ptr->active = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 503 | b_ptr->priority = priority; |
| 504 | INIT_LIST_HEAD(&b_ptr->cong_links); |
| 505 | INIT_LIST_HEAD(&b_ptr->links); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 506 | spin_lock_init(&b_ptr->lock); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 507 | |
| 508 | res = tipc_disc_create(b_ptr, &m_ptr->bcast_addr, disc_domain); |
| 509 | if (res) { |
| 510 | bearer_disable(b_ptr); |
| 511 | warn("Bearer <%s> rejected, discovery object creation failed\n", |
| 512 | name); |
| 513 | goto exit; |
| 514 | } |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 515 | info("Enabled bearer <%s>, discovery domain %s, priority %u\n", |
Allan Stephens | 50d3e63 | 2011-02-28 14:56:15 -0500 | [diff] [blame] | 516 | name, tipc_addr_string_fill(addr_string, disc_domain), priority); |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 517 | exit: |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 518 | write_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 519 | return res; |
| 520 | } |
| 521 | |
| 522 | /** |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 523 | * tipc_block_bearer - Block the bearer with the given name, and reset all its links |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 524 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 525 | int tipc_block_bearer(const char *name) |
| 526 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 527 | struct tipc_bearer *b_ptr = NULL; |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 528 | struct tipc_link *l_ptr; |
| 529 | struct tipc_link *temp_l_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 530 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 531 | read_lock_bh(&tipc_net_lock); |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 532 | b_ptr = tipc_bearer_find(name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 533 | if (!b_ptr) { |
| 534 | warn("Attempt to block unknown bearer <%s>\n", name); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 535 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 536 | return -EINVAL; |
| 537 | } |
| 538 | |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 539 | info("Blocking bearer <%s>\n", name); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 540 | spin_lock_bh(&b_ptr->lock); |
| 541 | b_ptr->blocked = 1; |
Allan Stephens | 4b3743e | 2011-05-26 13:59:17 -0400 | [diff] [blame] | 542 | list_splice_init(&b_ptr->cong_links, &b_ptr->links); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 543 | 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] | 544 | struct tipc_node *n_ptr = l_ptr->owner; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 545 | |
| 546 | spin_lock_bh(&n_ptr->lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 547 | tipc_link_reset(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 548 | spin_unlock_bh(&n_ptr->lock); |
| 549 | } |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 550 | spin_unlock_bh(&b_ptr->lock); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 551 | read_unlock_bh(&tipc_net_lock); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 552 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | /** |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 556 | * bearer_disable |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 557 | * |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 558 | * Note: This routine assumes caller holds tipc_net_lock. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 559 | */ |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 560 | static void bearer_disable(struct tipc_bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 561 | { |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 562 | struct tipc_link *l_ptr; |
| 563 | struct tipc_link *temp_l_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 564 | |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 565 | info("Disabling bearer <%s>\n", b_ptr->name); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 566 | spin_lock_bh(&b_ptr->lock); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 567 | b_ptr->blocked = 1; |
| 568 | b_ptr->media->disable_bearer(b_ptr); |
Allan Stephens | 4b3743e | 2011-05-26 13:59:17 -0400 | [diff] [blame] | 569 | list_splice_init(&b_ptr->cong_links, &b_ptr->links); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 570 | 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] | 571 | tipc_link_delete(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 572 | } |
Allan Stephens | 3a777ff | 2011-04-21 13:58:26 -0500 | [diff] [blame] | 573 | if (b_ptr->link_req) |
| 574 | tipc_disc_delete(b_ptr->link_req); |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 575 | spin_unlock_bh(&b_ptr->lock); |
| 576 | memset(b_ptr, 0, sizeof(struct tipc_bearer)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | int tipc_disable_bearer(const char *name) |
| 580 | { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 581 | struct tipc_bearer *b_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 582 | int res; |
| 583 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 584 | write_lock_bh(&tipc_net_lock); |
Allan Stephens | 5c216e1 | 2011-10-18 11:34:29 -0400 | [diff] [blame] | 585 | b_ptr = tipc_bearer_find(name); |
Allan Stephens | ccc901e | 2010-10-14 13:58:26 +0000 | [diff] [blame] | 586 | if (b_ptr == NULL) { |
| 587 | warn("Attempt to disable unknown bearer <%s>\n", name); |
| 588 | res = -EINVAL; |
Allan Stephens | 28cc937 | 2010-11-30 12:00:56 +0000 | [diff] [blame] | 589 | } else { |
| 590 | bearer_disable(b_ptr); |
| 591 | res = 0; |
| 592 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 593 | write_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 594 | return res; |
| 595 | } |
| 596 | |
| 597 | |
| 598 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 599 | void tipc_bearer_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 600 | { |
| 601 | u32 i; |
| 602 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 603 | for (i = 0; i < MAX_BEARERS; i++) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 604 | if (tipc_bearers[i].active) |
Allan Stephens | ccc901e | 2010-10-14 13:58:26 +0000 | [diff] [blame] | 605 | bearer_disable(&tipc_bearers[i]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 606 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 607 | media_count = 0; |
| 608 | } |