Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/name_distr.c: TIPC name distribution code |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 4 | * Copyright (c) 2000-2006, 2014, Ericsson AB |
Allan Stephens | 431697e | 2011-02-23 13:51:15 -0500 | [diff] [blame] | 5 | * Copyright (c) 2005, 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" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 38 | #include "link.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "name_distr.h" |
| 40 | |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 41 | int sysctl_tipc_named_timeout __read_mostly = 2000; |
| 42 | |
| 43 | /** |
| 44 | * struct tipc_dist_queue - queue holding deferred name table updates |
| 45 | */ |
| 46 | static struct list_head tipc_dist_queue = LIST_HEAD_INIT(tipc_dist_queue); |
| 47 | |
| 48 | struct distr_queue_item { |
| 49 | struct distr_item i; |
| 50 | u32 dtype; |
| 51 | u32 node; |
| 52 | unsigned long expires; |
| 53 | struct list_head next; |
| 54 | }; |
| 55 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 56 | /** |
| 57 | * publ_to_item - add publication info to a publication message |
| 58 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 59 | static void publ_to_item(struct distr_item *i, struct publication *p) |
| 60 | { |
| 61 | i->type = htonl(p->type); |
| 62 | i->lower = htonl(p->lower); |
| 63 | i->upper = htonl(p->upper); |
| 64 | i->ref = htonl(p->ref); |
| 65 | i->key = htonl(p->key); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | /** |
| 69 | * named_prepare_buf - allocate & initialize a publication message |
| 70 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 71 | static struct sk_buff *named_prepare_buf(u32 type, u32 size, u32 dest) |
| 72 | { |
Allan Stephens | 741d9eb | 2011-05-31 15:03:18 -0400 | [diff] [blame] | 73 | struct sk_buff *buf = tipc_buf_acquire(INT_H_SIZE + size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 74 | struct tipc_msg *msg; |
| 75 | |
| 76 | if (buf != NULL) { |
| 77 | msg = buf_msg(buf); |
Allan Stephens | 741d9eb | 2011-05-31 15:03:18 -0400 | [diff] [blame] | 78 | tipc_msg_init(msg, NAME_DISTRIBUTOR, type, INT_H_SIZE, dest); |
| 79 | msg_set_size(msg, INT_H_SIZE + size); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 80 | } |
| 81 | return buf; |
| 82 | } |
| 83 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 84 | void named_cluster_distribute(struct net *net, struct sk_buff *skb) |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 85 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 86 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 87 | struct sk_buff *oskb; |
Jon Paul Maloy | dbdf6d2 | 2014-07-16 20:40:58 -0400 | [diff] [blame] | 88 | struct tipc_node *node; |
| 89 | u32 dnode; |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 90 | |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 91 | rcu_read_lock(); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 92 | list_for_each_entry_rcu(node, &tn->node_list, list) { |
Jon Paul Maloy | dbdf6d2 | 2014-07-16 20:40:58 -0400 | [diff] [blame] | 93 | dnode = node->addr; |
| 94 | if (in_own_node(dnode)) |
| 95 | continue; |
| 96 | if (!tipc_node_active_links(node)) |
| 97 | continue; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 98 | oskb = skb_copy(skb, GFP_ATOMIC); |
| 99 | if (!oskb) |
Jon Paul Maloy | dbdf6d2 | 2014-07-16 20:40:58 -0400 | [diff] [blame] | 100 | break; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 101 | msg_set_destnode(buf_msg(oskb), dnode); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 102 | tipc_link_xmit_skb(net, oskb, dnode, dnode); |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 103 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 104 | rcu_read_unlock(); |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 105 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 106 | kfree_skb(skb); |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 107 | } |
| 108 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 109 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 110 | * tipc_named_publish - tell other nodes about a new publication by this node |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 111 | */ |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 112 | struct sk_buff *tipc_named_publish(struct publication *publ) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 113 | { |
| 114 | struct sk_buff *buf; |
| 115 | struct distr_item *item; |
| 116 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 117 | list_add_tail_rcu(&publ->local_list, |
| 118 | &tipc_nametbl->publ_list[publ->scope]); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 119 | |
Allan Stephens | 1110b8d | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 120 | if (publ->scope == TIPC_NODE_SCOPE) |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 121 | return NULL; |
Allan Stephens | 1110b8d | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 122 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 123 | buf = named_prepare_buf(PUBLICATION, ITEM_SIZE, 0); |
| 124 | if (!buf) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 125 | pr_warn("Publication distribution failure\n"); |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 126 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | item = (struct distr_item *)msg_data(buf_msg(buf)); |
| 130 | publ_to_item(item, publ); |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 131 | return buf; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 135 | * tipc_named_withdraw - tell other nodes about a withdrawn publication by this node |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 136 | */ |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 137 | struct sk_buff *tipc_named_withdraw(struct publication *publ) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 138 | { |
| 139 | struct sk_buff *buf; |
| 140 | struct distr_item *item; |
| 141 | |
| 142 | list_del(&publ->local_list); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 143 | |
Allan Stephens | 1110b8d | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 144 | if (publ->scope == TIPC_NODE_SCOPE) |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 145 | return NULL; |
Allan Stephens | 1110b8d | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 146 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 147 | buf = named_prepare_buf(WITHDRAWAL, ITEM_SIZE, 0); |
| 148 | if (!buf) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 149 | pr_warn("Withdrawal distribution failure\n"); |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 150 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | item = (struct distr_item *)msg_data(buf_msg(buf)); |
| 154 | publ_to_item(item, publ); |
Ying Xue | eab8c045 | 2014-04-28 18:00:10 +0800 | [diff] [blame] | 155 | return buf; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 156 | } |
| 157 | |
Jon Paul Maloy | dbdf6d2 | 2014-07-16 20:40:58 -0400 | [diff] [blame] | 158 | /** |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 159 | * named_distribute - prepare name info for bulk distribution to another node |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 160 | * @list: list of messages (buffers) to be returned from this function |
Jon Paul Maloy | dbdf6d2 | 2014-07-16 20:40:58 -0400 | [diff] [blame] | 161 | * @dnode: node to be updated |
| 162 | * @pls: linked list of publication items to be packed into buffer chain |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 163 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 164 | static void named_distribute(struct net *net, struct sk_buff_head *list, |
| 165 | u32 dnode, struct list_head *pls) |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 166 | { |
| 167 | struct publication *publ; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 168 | struct sk_buff *skb = NULL; |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 169 | struct distr_item *item = NULL; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 170 | uint msg_dsz = (tipc_node_get_mtu(net, dnode, 0) / ITEM_SIZE) * |
| 171 | ITEM_SIZE; |
Ying Xue | 1b61e70 | 2014-12-02 15:00:23 +0800 | [diff] [blame] | 172 | uint msg_rem = msg_dsz; |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 173 | |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 174 | list_for_each_entry(publ, pls, local_list) { |
Jon Paul Maloy | dbdf6d2 | 2014-07-16 20:40:58 -0400 | [diff] [blame] | 175 | /* Prepare next buffer: */ |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 176 | if (!skb) { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 177 | skb = named_prepare_buf(PUBLICATION, msg_rem, dnode); |
| 178 | if (!skb) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 179 | pr_warn("Bulk publication failure\n"); |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 180 | return; |
| 181 | } |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 182 | item = (struct distr_item *)msg_data(buf_msg(skb)); |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 183 | } |
Jon Paul Maloy | dbdf6d2 | 2014-07-16 20:40:58 -0400 | [diff] [blame] | 184 | |
| 185 | /* Pack publication into message: */ |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 186 | publ_to_item(item, publ); |
| 187 | item++; |
Jon Paul Maloy | dbdf6d2 | 2014-07-16 20:40:58 -0400 | [diff] [blame] | 188 | msg_rem -= ITEM_SIZE; |
| 189 | |
| 190 | /* Append full buffer to list: */ |
| 191 | if (!msg_rem) { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 192 | __skb_queue_tail(list, skb); |
| 193 | skb = NULL; |
Ying Xue | 1b61e70 | 2014-12-02 15:00:23 +0800 | [diff] [blame] | 194 | msg_rem = msg_dsz; |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 195 | } |
| 196 | } |
Ying Xue | 1b61e70 | 2014-12-02 15:00:23 +0800 | [diff] [blame] | 197 | if (skb) { |
| 198 | msg_set_size(buf_msg(skb), INT_H_SIZE + (msg_dsz - msg_rem)); |
| 199 | skb_trim(skb, INT_H_SIZE + (msg_dsz - msg_rem)); |
| 200 | __skb_queue_tail(list, skb); |
| 201 | } |
Allan Stephens | e11aa05 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 202 | } |
| 203 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 204 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 205 | * tipc_named_node_up - tell specified node about all publications by this node |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 206 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 207 | void tipc_named_node_up(struct net *net, u32 dnode) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 208 | { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 209 | struct sk_buff_head head; |
| 210 | |
| 211 | __skb_queue_head_init(&head); |
Allan Stephens | 9aa88c2 | 2011-05-31 13:38:02 -0400 | [diff] [blame] | 212 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 213 | rcu_read_lock(); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 214 | named_distribute(net, &head, dnode, |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 215 | &tipc_nametbl->publ_list[TIPC_CLUSTER_SCOPE]); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 216 | named_distribute(net, &head, dnode, |
Ying Xue | 993bfe5 | 2014-12-02 15:00:24 +0800 | [diff] [blame] | 217 | &tipc_nametbl->publ_list[TIPC_ZONE_SCOPE]); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 218 | rcu_read_unlock(); |
Allan Stephens | 9aa88c2 | 2011-05-31 13:38:02 -0400 | [diff] [blame] | 219 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 220 | tipc_link_xmit(net, &head, dnode, dnode); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 221 | } |
| 222 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 223 | static void tipc_publ_subscribe(struct net *net, struct publication *publ, |
| 224 | u32 addr) |
Ying Xue | a8f48af | 2014-11-26 11:41:45 +0800 | [diff] [blame] | 225 | { |
| 226 | struct tipc_node *node; |
| 227 | |
| 228 | if (in_own_node(addr)) |
| 229 | return; |
| 230 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 231 | node = tipc_node_find(net, addr); |
Ying Xue | a8f48af | 2014-11-26 11:41:45 +0800 | [diff] [blame] | 232 | if (!node) { |
| 233 | pr_warn("Node subscription rejected, unknown node 0x%x\n", |
| 234 | addr); |
| 235 | return; |
| 236 | } |
| 237 | |
| 238 | tipc_node_lock(node); |
| 239 | list_add_tail(&publ->nodesub_list, &node->publ_list); |
| 240 | tipc_node_unlock(node); |
| 241 | } |
| 242 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 243 | static void tipc_publ_unsubscribe(struct net *net, struct publication *publ, |
| 244 | u32 addr) |
Ying Xue | a8f48af | 2014-11-26 11:41:45 +0800 | [diff] [blame] | 245 | { |
| 246 | struct tipc_node *node; |
| 247 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 248 | node = tipc_node_find(net, addr); |
Ying Xue | a8f48af | 2014-11-26 11:41:45 +0800 | [diff] [blame] | 249 | if (!node) |
| 250 | return; |
| 251 | |
| 252 | tipc_node_lock(node); |
| 253 | list_del_init(&publ->nodesub_list); |
| 254 | tipc_node_unlock(node); |
| 255 | } |
| 256 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 257 | /** |
Ying Xue | a8f48af | 2014-11-26 11:41:45 +0800 | [diff] [blame] | 258 | * tipc_publ_purge - remove publication associated with a failed node |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 259 | * |
| 260 | * Invoked for each publication issued by a newly failed node. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 261 | * Removes publication structure from name table & deletes it. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 262 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 263 | static void tipc_publ_purge(struct net *net, struct publication *publ, u32 addr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 264 | { |
| 265 | struct publication *p; |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 266 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 267 | spin_lock_bh(&tipc_nametbl_lock); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 268 | p = tipc_nametbl_remove_publ(publ->type, publ->lower, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 269 | publ->node, publ->ref, publ->key); |
Allan Stephens | 431697e | 2011-02-23 13:51:15 -0500 | [diff] [blame] | 270 | if (p) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 271 | tipc_publ_unsubscribe(net, p, addr); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 272 | spin_unlock_bh(&tipc_nametbl_lock); |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 273 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 274 | if (p != publ) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 275 | pr_err("Unable to remove publication from failed node\n" |
| 276 | " (type=%u, lower=%u, node=0x%x, ref=%u, key=%u)\n", |
| 277 | publ->type, publ->lower, publ->node, publ->ref, |
| 278 | publ->key); |
Allan Stephens | f131072 | 2006-06-25 23:51:37 -0700 | [diff] [blame] | 279 | } |
| 280 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 281 | kfree_rcu(p, rcu); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 282 | } |
| 283 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 284 | void tipc_publ_notify(struct net *net, struct list_head *nsub_list, u32 addr) |
Ying Xue | a8f48af | 2014-11-26 11:41:45 +0800 | [diff] [blame] | 285 | { |
| 286 | struct publication *publ, *tmp; |
| 287 | |
| 288 | list_for_each_entry_safe(publ, tmp, nsub_list, nodesub_list) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 289 | tipc_publ_purge(net, publ, addr); |
Ying Xue | a8f48af | 2014-11-26 11:41:45 +0800 | [diff] [blame] | 290 | } |
| 291 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 292 | /** |
Erik Hugne | f4ad8a4 | 2014-08-28 09:08:46 +0200 | [diff] [blame] | 293 | * tipc_update_nametbl - try to process a nametable update and notify |
| 294 | * subscribers |
| 295 | * |
| 296 | * tipc_nametbl_lock must be held. |
| 297 | * Returns the publication item if successful, otherwise NULL. |
| 298 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 299 | static bool tipc_update_nametbl(struct net *net, struct distr_item *i, |
| 300 | u32 node, u32 dtype) |
Erik Hugne | f4ad8a4 | 2014-08-28 09:08:46 +0200 | [diff] [blame] | 301 | { |
| 302 | struct publication *publ = NULL; |
| 303 | |
| 304 | if (dtype == PUBLICATION) { |
| 305 | publ = tipc_nametbl_insert_publ(ntohl(i->type), ntohl(i->lower), |
| 306 | ntohl(i->upper), |
| 307 | TIPC_CLUSTER_SCOPE, node, |
| 308 | ntohl(i->ref), ntohl(i->key)); |
| 309 | if (publ) { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 310 | tipc_publ_subscribe(net, publ, node); |
Erik Hugne | 0fc4dff | 2014-09-10 14:02:50 +0200 | [diff] [blame] | 311 | return true; |
Erik Hugne | f4ad8a4 | 2014-08-28 09:08:46 +0200 | [diff] [blame] | 312 | } |
| 313 | } else if (dtype == WITHDRAWAL) { |
| 314 | publ = tipc_nametbl_remove_publ(ntohl(i->type), ntohl(i->lower), |
| 315 | node, ntohl(i->ref), |
| 316 | ntohl(i->key)); |
| 317 | if (publ) { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 318 | tipc_publ_unsubscribe(net, publ, node); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 319 | kfree_rcu(publ, rcu); |
Erik Hugne | 0fc4dff | 2014-09-10 14:02:50 +0200 | [diff] [blame] | 320 | return true; |
Erik Hugne | f4ad8a4 | 2014-08-28 09:08:46 +0200 | [diff] [blame] | 321 | } |
| 322 | } else { |
| 323 | pr_warn("Unrecognized name table message received\n"); |
| 324 | } |
Erik Hugne | 0fc4dff | 2014-09-10 14:02:50 +0200 | [diff] [blame] | 325 | return false; |
Erik Hugne | f4ad8a4 | 2014-08-28 09:08:46 +0200 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | /** |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 329 | * tipc_named_add_backlog - add a failed name table update to the backlog |
| 330 | * |
| 331 | */ |
| 332 | static void tipc_named_add_backlog(struct distr_item *i, u32 type, u32 node) |
| 333 | { |
| 334 | struct distr_queue_item *e; |
| 335 | unsigned long now = get_jiffies_64(); |
| 336 | |
| 337 | e = kzalloc(sizeof(*e), GFP_ATOMIC); |
| 338 | if (!e) |
| 339 | return; |
| 340 | e->dtype = type; |
| 341 | e->node = node; |
| 342 | e->expires = now + msecs_to_jiffies(sysctl_tipc_named_timeout); |
| 343 | memcpy(e, i, sizeof(*i)); |
| 344 | list_add_tail(&e->next, &tipc_dist_queue); |
| 345 | } |
| 346 | |
| 347 | /** |
| 348 | * tipc_named_process_backlog - try to process any pending name table updates |
| 349 | * from the network. |
| 350 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 351 | void tipc_named_process_backlog(struct net *net) |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 352 | { |
| 353 | struct distr_queue_item *e, *tmp; |
| 354 | char addr[16]; |
| 355 | unsigned long now = get_jiffies_64(); |
| 356 | |
| 357 | list_for_each_entry_safe(e, tmp, &tipc_dist_queue, next) { |
| 358 | if (time_after(e->expires, now)) { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 359 | if (!tipc_update_nametbl(net, &e->i, e->node, e->dtype)) |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 360 | continue; |
| 361 | } else { |
| 362 | tipc_addr_string_fill(addr, e->node); |
| 363 | pr_warn_ratelimited("Dropping name table update (%d) of {%u, %u, %u} from %s key=%u\n", |
| 364 | e->dtype, ntohl(e->i.type), |
| 365 | ntohl(e->i.lower), |
| 366 | ntohl(e->i.upper), |
| 367 | addr, ntohl(e->i.key)); |
| 368 | } |
| 369 | list_del(&e->next); |
| 370 | kfree(e); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 375 | * tipc_named_rcv - process name table update message sent by another node |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 376 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 377 | void tipc_named_rcv(struct net *net, struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 378 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 379 | struct tipc_msg *msg = buf_msg(buf); |
| 380 | struct distr_item *item = (struct distr_item *)msg_data(msg); |
| 381 | u32 count = msg_data_sz(msg) / ITEM_SIZE; |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 382 | u32 node = msg_orignode(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 383 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 384 | spin_lock_bh(&tipc_nametbl_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 385 | while (count--) { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 386 | if (!tipc_update_nametbl(net, item, node, msg_type(msg))) |
Erik Hugne | a5325ae | 2014-08-28 09:08:47 +0200 | [diff] [blame] | 387 | tipc_named_add_backlog(item, msg_type(msg), node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 388 | item++; |
| 389 | } |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame^] | 390 | tipc_named_process_backlog(net); |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 391 | spin_unlock_bh(&tipc_nametbl_lock); |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 392 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | /** |
Allan Stephens | 1110b8d | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 396 | * tipc_named_reinit - re-initialize local publications |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 397 | * |
Allan Stephens | 945af1c | 2011-10-14 14:42:25 -0400 | [diff] [blame] | 398 | * This routine is called whenever TIPC networking is enabled. |
Allan Stephens | 1110b8d | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 399 | * All name table entries published by this node are updated to reflect |
| 400 | * the node's new network address. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 401 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 402 | void tipc_named_reinit(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 403 | { |
| 404 | struct publication *publ; |
Allan Stephens | a909804 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 405 | int scope; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 406 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 407 | spin_lock_bh(&tipc_nametbl_lock); |
Allan Stephens | 945af1c | 2011-10-14 14:42:25 -0400 | [diff] [blame] | 408 | |
Allan Stephens | 1110b8d | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 409 | for (scope = TIPC_ZONE_SCOPE; scope <= TIPC_NODE_SCOPE; scope++) |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 410 | list_for_each_entry_rcu(publ, &tipc_nametbl->publ_list[scope], |
| 411 | local_list) |
Allan Stephens | a909804 | 2012-04-17 17:57:52 -0400 | [diff] [blame] | 412 | publ->node = tipc_own_addr; |
Allan Stephens | 945af1c | 2011-10-14 14:42:25 -0400 | [diff] [blame] | 413 | |
Ying Xue | 97ede29 | 2014-12-02 15:00:30 +0800 | [diff] [blame] | 414 | spin_unlock_bh(&tipc_nametbl_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 415 | } |