Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/node.c: TIPC node management routines |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 4 | * Copyright (c) 2000-2006, 2012-2015, Ericsson AB |
Ying Xue | 46651c5 | 2014-03-27 12:54:36 +0800 | [diff] [blame] | 5 | * Copyright (c) 2005-2006, 2010-2014, 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" |
Richard Alpe | 22ae7cf | 2015-02-09 09:50:18 +0100 | [diff] [blame] | 38 | #include "link.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "node.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 40 | #include "name_distr.h" |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 41 | #include "socket.h" |
Jon Paul Maloy | a6bf70f | 2015-05-14 10:46:13 -0400 | [diff] [blame] | 42 | #include "bcast.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 43 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 44 | static void node_lost_contact(struct tipc_node *n_ptr); |
| 45 | static void node_established_contact(struct tipc_node *n_ptr); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 46 | static void tipc_node_delete(struct tipc_node *node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 47 | |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 48 | struct tipc_sock_conn { |
| 49 | u32 port; |
| 50 | u32 peer_port; |
| 51 | u32 peer_node; |
| 52 | struct list_head list; |
| 53 | }; |
| 54 | |
Richard Alpe | 3e4b6ab | 2014-11-20 10:29:17 +0100 | [diff] [blame] | 55 | static const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = { |
| 56 | [TIPC_NLA_NODE_UNSPEC] = { .type = NLA_UNSPEC }, |
| 57 | [TIPC_NLA_NODE_ADDR] = { .type = NLA_U32 }, |
| 58 | [TIPC_NLA_NODE_UP] = { .type = NLA_FLAG } |
| 59 | }; |
| 60 | |
Allan Stephens | 1ec2bb0 | 2011-10-27 15:03:24 -0400 | [diff] [blame] | 61 | /* |
Allan Stephens | a635b46 | 2011-11-04 11:54:43 -0400 | [diff] [blame] | 62 | * A trivial power-of-two bitmask technique is used for speed, since this |
| 63 | * operation is done for every incoming TIPC packet. The number of hash table |
| 64 | * entries has been chosen so that no hash chain exceeds 8 nodes and will |
| 65 | * usually be much smaller (typically only a single node). |
| 66 | */ |
Paul Gortmaker | 872f24d | 2012-04-23 04:49:13 +0000 | [diff] [blame] | 67 | static unsigned int tipc_hashfn(u32 addr) |
Allan Stephens | a635b46 | 2011-11-04 11:54:43 -0400 | [diff] [blame] | 68 | { |
| 69 | return addr & (NODE_HTABLE_SIZE - 1); |
| 70 | } |
| 71 | |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 72 | static void tipc_node_kref_release(struct kref *kref) |
| 73 | { |
| 74 | struct tipc_node *node = container_of(kref, struct tipc_node, kref); |
| 75 | |
| 76 | tipc_node_delete(node); |
| 77 | } |
| 78 | |
| 79 | void tipc_node_put(struct tipc_node *node) |
| 80 | { |
| 81 | kref_put(&node->kref, tipc_node_kref_release); |
| 82 | } |
| 83 | |
| 84 | static void tipc_node_get(struct tipc_node *node) |
| 85 | { |
| 86 | kref_get(&node->kref); |
| 87 | } |
| 88 | |
Allan Stephens | a635b46 | 2011-11-04 11:54:43 -0400 | [diff] [blame] | 89 | /* |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 90 | * tipc_node_find - locate specified node object, if it exists |
| 91 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 92 | struct tipc_node *tipc_node_find(struct net *net, u32 addr) |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 93 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 94 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 95 | struct tipc_node *node; |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 96 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 97 | if (unlikely(!in_own_cluster_exact(net, addr))) |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 98 | return NULL; |
| 99 | |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 100 | rcu_read_lock(); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 101 | hlist_for_each_entry_rcu(node, &tn->node_htable[tipc_hashfn(addr)], |
| 102 | hash) { |
Ying Xue | 46651c5 | 2014-03-27 12:54:36 +0800 | [diff] [blame] | 103 | if (node->addr == addr) { |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 104 | tipc_node_get(node); |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 105 | rcu_read_unlock(); |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 106 | return node; |
Ying Xue | 46651c5 | 2014-03-27 12:54:36 +0800 | [diff] [blame] | 107 | } |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 108 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 109 | rcu_read_unlock(); |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 110 | return NULL; |
| 111 | } |
| 112 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 113 | struct tipc_node *tipc_node_create(struct net *net, u32 addr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 114 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 115 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 116 | struct tipc_node *n_ptr, *temp_node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 117 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 118 | spin_lock_bh(&tn->node_list_lock); |
Jon Paul Maloy | b45db71 | 2015-02-03 08:59:19 -0500 | [diff] [blame] | 119 | n_ptr = tipc_node_find(net, addr); |
| 120 | if (n_ptr) |
| 121 | goto exit; |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 122 | n_ptr = kzalloc(sizeof(*n_ptr), GFP_ATOMIC); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 123 | if (!n_ptr) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 124 | pr_warn("Node creation failed, no memory\n"); |
Jon Paul Maloy | b45db71 | 2015-02-03 08:59:19 -0500 | [diff] [blame] | 125 | goto exit; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 126 | } |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 127 | n_ptr->addr = addr; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 128 | n_ptr->net = net; |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 129 | kref_init(&n_ptr->kref); |
Allan Stephens | 51a8e4d | 2010-12-31 18:59:18 +0000 | [diff] [blame] | 130 | spin_lock_init(&n_ptr->lock); |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 131 | INIT_HLIST_NODE(&n_ptr->hash); |
| 132 | INIT_LIST_HEAD(&n_ptr->list); |
Ying Xue | a8f48af | 2014-11-26 11:41:45 +0800 | [diff] [blame] | 133 | INIT_LIST_HEAD(&n_ptr->publ_list); |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 134 | INIT_LIST_HEAD(&n_ptr->conn_sks); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 135 | __skb_queue_head_init(&n_ptr->bclink.deferdq); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 136 | hlist_add_head_rcu(&n_ptr->hash, &tn->node_htable[tipc_hashfn(addr)]); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 137 | list_for_each_entry_rcu(temp_node, &tn->node_list, list) { |
Allan Stephens | 672d99e | 2011-02-25 18:42:52 -0500 | [diff] [blame] | 138 | if (n_ptr->addr < temp_node->addr) |
| 139 | break; |
| 140 | } |
Ying Xue | 6c7a762 | 2014-03-27 12:54:37 +0800 | [diff] [blame] | 141 | list_add_tail_rcu(&n_ptr->list, &temp_node->list); |
Ying Xue | aecb9bb | 2014-05-08 08:54:39 +0800 | [diff] [blame] | 142 | n_ptr->action_flags = TIPC_WAIT_PEER_LINKS_DOWN; |
Allan Stephens | fc0eea6 | 2011-10-28 16:26:41 -0400 | [diff] [blame] | 143 | n_ptr->signature = INVALID_NODE_SIG; |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 144 | tipc_node_get(n_ptr); |
Jon Paul Maloy | b45db71 | 2015-02-03 08:59:19 -0500 | [diff] [blame] | 145 | exit: |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 146 | spin_unlock_bh(&tn->node_list_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 147 | return n_ptr; |
| 148 | } |
| 149 | |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 150 | static void tipc_node_delete(struct tipc_node *node) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 151 | { |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 152 | list_del_rcu(&node->list); |
| 153 | hlist_del_rcu(&node->hash); |
| 154 | kfree_rcu(node, rcu); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 155 | } |
| 156 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 157 | void tipc_node_stop(struct net *net) |
Ying Xue | 46651c5 | 2014-03-27 12:54:36 +0800 | [diff] [blame] | 158 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 159 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 46651c5 | 2014-03-27 12:54:36 +0800 | [diff] [blame] | 160 | struct tipc_node *node, *t_node; |
| 161 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 162 | spin_lock_bh(&tn->node_list_lock); |
| 163 | list_for_each_entry_safe(node, t_node, &tn->node_list, list) |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 164 | tipc_node_put(node); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 165 | spin_unlock_bh(&tn->node_list_lock); |
Ying Xue | 46651c5 | 2014-03-27 12:54:36 +0800 | [diff] [blame] | 166 | } |
| 167 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 168 | int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port) |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 169 | { |
| 170 | struct tipc_node *node; |
| 171 | struct tipc_sock_conn *conn; |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 172 | int err = 0; |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 173 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 174 | if (in_own_node(net, dnode)) |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 175 | return 0; |
| 176 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 177 | node = tipc_node_find(net, dnode); |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 178 | if (!node) { |
| 179 | pr_warn("Connecting sock to node 0x%x failed\n", dnode); |
| 180 | return -EHOSTUNREACH; |
| 181 | } |
| 182 | conn = kmalloc(sizeof(*conn), GFP_ATOMIC); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 183 | if (!conn) { |
| 184 | err = -EHOSTUNREACH; |
| 185 | goto exit; |
| 186 | } |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 187 | conn->peer_node = dnode; |
| 188 | conn->port = port; |
| 189 | conn->peer_port = peer_port; |
| 190 | |
| 191 | tipc_node_lock(node); |
| 192 | list_add_tail(&conn->list, &node->conn_sks); |
| 193 | tipc_node_unlock(node); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 194 | exit: |
| 195 | tipc_node_put(node); |
| 196 | return err; |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 197 | } |
| 198 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 199 | void tipc_node_remove_conn(struct net *net, u32 dnode, u32 port) |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 200 | { |
| 201 | struct tipc_node *node; |
| 202 | struct tipc_sock_conn *conn, *safe; |
| 203 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 204 | if (in_own_node(net, dnode)) |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 205 | return; |
| 206 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 207 | node = tipc_node_find(net, dnode); |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 208 | if (!node) |
| 209 | return; |
| 210 | |
| 211 | tipc_node_lock(node); |
| 212 | list_for_each_entry_safe(conn, safe, &node->conn_sks, list) { |
| 213 | if (port != conn->port) |
| 214 | continue; |
| 215 | list_del(&conn->list); |
| 216 | kfree(conn); |
| 217 | } |
| 218 | tipc_node_unlock(node); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 219 | tipc_node_put(node); |
Jon Paul Maloy | 02be61a | 2014-08-22 18:09:08 -0400 | [diff] [blame] | 220 | } |
| 221 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 222 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 223 | * tipc_node_link_up - handle addition of link |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 224 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 225 | * Link becomes active (alone or shared) or standby, depending on its priority. |
| 226 | */ |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 227 | void tipc_node_link_up(struct tipc_node *n, int bearer_id) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 228 | { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 229 | struct tipc_link_entry **actv = &n->active_links[0]; |
| 230 | struct tipc_link_entry *le = &n->links[bearer_id]; |
| 231 | struct tipc_link *l = le->link; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 232 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 233 | /* Leave room for tunnel header when returning 'mtu' to users: */ |
| 234 | n->links[bearer_id].mtu = l->mtu - INT_H_SIZE; |
| 235 | |
| 236 | n->working_links++; |
| 237 | n->action_flags |= TIPC_NOTIFY_LINK_UP; |
| 238 | n->link_id = l->peer_bearer_id << 16 | l->bearer_id; |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 239 | |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 240 | pr_debug("Established link <%s> on network plane %c\n", |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 241 | l->name, l->net_plane); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 242 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 243 | /* No active links ? => take both active slots */ |
| 244 | if (!actv[0]) { |
| 245 | actv[0] = le; |
| 246 | actv[1] = le; |
| 247 | node_established_contact(n); |
| 248 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 249 | } |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 250 | if (l->priority < actv[0]->link->priority) { |
| 251 | pr_debug("New link <%s> becomes standby\n", l->name); |
| 252 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 253 | } |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 254 | tipc_link_dup_queue_xmit(actv[0]->link, l); |
| 255 | |
| 256 | /* Take one active slot if applicable */ |
| 257 | if (l->priority == actv[0]->link->priority) { |
| 258 | actv[0] = le; |
| 259 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 260 | } |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 261 | /* Higher prio than current active? => take both active slots */ |
| 262 | pr_debug("Old l <%s> becomes standby\n", actv[0]->link->name); |
| 263 | if (actv[1] != actv[0]) |
| 264 | pr_debug("Old link <%s> now standby\n", actv[1]->link->name); |
| 265 | actv[0] = le; |
| 266 | actv[1] = le; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | /** |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 270 | * node_select_active_links - select which working links should be active |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 271 | */ |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 272 | static void node_select_active_links(struct tipc_node *n) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 273 | { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 274 | struct tipc_link_entry **actv = &n->active_links[0]; |
| 275 | struct tipc_link *l; |
| 276 | u32 b, highest = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 277 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 278 | actv[0] = NULL; |
| 279 | actv[1] = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 280 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 281 | for (b = 0; b < MAX_BEARERS; b++) { |
| 282 | l = n->links[b].link; |
| 283 | if (!l || !tipc_link_is_up(l) || (l->priority < highest)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 284 | continue; |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 285 | if (l->priority > highest) { |
| 286 | highest = l->priority; |
| 287 | actv[0] = &n->links[b]; |
| 288 | actv[1] = &n->links[b]; |
| 289 | continue; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 290 | } |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 291 | actv[1] = &n->links[b]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 292 | } |
| 293 | } |
| 294 | |
| 295 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 296 | * tipc_node_link_down - handle loss of link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 297 | */ |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 298 | void tipc_node_link_down(struct tipc_node *n, int bearer_id) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 299 | { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 300 | struct tipc_link_entry **actv = &n->active_links[0]; |
| 301 | struct tipc_link_entry *le = &n->links[bearer_id]; |
| 302 | struct tipc_link *l = le->link; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 303 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 304 | n->working_links--; |
| 305 | n->action_flags |= TIPC_NOTIFY_LINK_DOWN; |
| 306 | n->link_id = l->peer_bearer_id << 16 | l->bearer_id; |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 307 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 308 | if (!tipc_link_is_active(l)) { |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 309 | pr_debug("Lost standby link <%s> on network plane %c\n", |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 310 | l->name, l->net_plane); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 311 | return; |
| 312 | } |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 313 | pr_debug("Lost link <%s> on network plane %c\n", |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 314 | l->name, l->net_plane); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 315 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 316 | /* Resdistribute active slots if applicable */ |
| 317 | if (actv[0] == le) |
| 318 | actv[0] = actv[1]; |
| 319 | if (actv[1] == le) |
| 320 | actv[1] = actv[0]; |
| 321 | |
| 322 | /* Last link of this priority? => select other ones if available */ |
| 323 | if (actv[0] == le) |
| 324 | node_select_active_links(n); |
| 325 | |
| 326 | if (tipc_node_is_up(n)) |
| 327 | tipc_link_failover_send_queue(l); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 328 | else |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 329 | node_lost_contact(n); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 330 | } |
| 331 | |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 332 | bool tipc_node_is_up(struct tipc_node *n) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 333 | { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 334 | return n->active_links[0]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 335 | } |
| 336 | |
Jon Paul Maloy | d3a43b9 | 2015-07-16 16:54:20 -0400 | [diff] [blame^] | 337 | void tipc_node_check_dest(struct tipc_node *n, struct tipc_bearer *b, |
| 338 | bool *link_up, bool *addr_match, |
| 339 | struct tipc_media_addr *maddr) |
| 340 | { |
| 341 | struct tipc_link *l = n->links[b->identity].link; |
| 342 | struct tipc_media_addr *curr = &n->links[b->identity].maddr; |
| 343 | |
| 344 | *link_up = l && tipc_link_is_up(l); |
| 345 | *addr_match = l && !memcmp(curr, maddr, sizeof(*maddr)); |
| 346 | } |
| 347 | |
| 348 | bool tipc_node_update_dest(struct tipc_node *n, struct tipc_bearer *b, |
| 349 | struct tipc_media_addr *maddr) |
| 350 | { |
| 351 | struct tipc_link *l = n->links[b->identity].link; |
| 352 | struct tipc_media_addr *curr = &n->links[b->identity].maddr; |
| 353 | |
| 354 | if (!l) |
| 355 | l = tipc_link_create(n, b, maddr); |
| 356 | if (!l) |
| 357 | return false; |
| 358 | memcpy(&l->media_addr, maddr, sizeof(*maddr)); |
| 359 | memcpy(curr, maddr, sizeof(*maddr)); |
| 360 | tipc_link_reset(l); |
| 361 | return true; |
| 362 | } |
| 363 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 364 | void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 365 | { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 366 | n_ptr->links[l_ptr->bearer_id].link = l_ptr; |
Allan Stephens | 37b9c08 | 2011-02-28 11:32:27 -0500 | [diff] [blame] | 367 | n_ptr->link_cnt++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 368 | } |
| 369 | |
Paul Gortmaker | a18c4bc | 2011-12-29 20:58:42 -0500 | [diff] [blame] | 370 | void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 371 | { |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 372 | int i; |
| 373 | |
| 374 | for (i = 0; i < MAX_BEARERS; i++) { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 375 | if (l_ptr != n_ptr->links[i].link) |
Jon Paul Maloy | 074bb43 | 2014-02-14 16:40:43 -0500 | [diff] [blame] | 376 | continue; |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 377 | n_ptr->links[i].link = NULL; |
Jon Paul Maloy | 074bb43 | 2014-02-14 16:40:43 -0500 | [diff] [blame] | 378 | n_ptr->link_cnt--; |
Jon Paul Maloy | 7d33939 | 2014-02-13 17:29:16 -0500 | [diff] [blame] | 379 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 380 | } |
| 381 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 382 | static void node_established_contact(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 383 | { |
Ying Xue | aecb9bb | 2014-05-08 08:54:39 +0800 | [diff] [blame] | 384 | n_ptr->action_flags |= TIPC_NOTIFY_NODE_UP; |
Jon Maloy | c64f7a6 | 2012-11-16 13:51:31 +0800 | [diff] [blame] | 385 | n_ptr->bclink.oos_state = 0; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 386 | n_ptr->bclink.acked = tipc_bclink_get_last_sent(n_ptr->net); |
| 387 | tipc_bclink_add_node(n_ptr->net, n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 388 | } |
| 389 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 390 | static void node_lost_contact(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 391 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 392 | char addr_string[16]; |
Jon Paul Maloy | 708ac32 | 2015-02-05 08:36:42 -0500 | [diff] [blame] | 393 | struct tipc_sock_conn *conn, *safe; |
| 394 | struct list_head *conns = &n_ptr->conn_sks; |
| 395 | struct sk_buff *skb; |
| 396 | struct tipc_net *tn = net_generic(n_ptr->net, tipc_net_id); |
| 397 | uint i; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 398 | |
Erik Hugne | 3fa9cac | 2015-01-22 17:10:31 +0100 | [diff] [blame] | 399 | pr_debug("Lost contact with %s\n", |
| 400 | tipc_addr_string_fill(addr_string, n_ptr->addr)); |
Allan Stephens | c5bd4d8 | 2011-04-07 11:58:08 -0400 | [diff] [blame] | 401 | |
| 402 | /* Flush broadcast link info associated with lost node */ |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 403 | if (n_ptr->bclink.recv_permitted) { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 404 | __skb_queue_purge(&n_ptr->bclink.deferdq); |
Allan Stephens | c5bd4d8 | 2011-04-07 11:58:08 -0400 | [diff] [blame] | 405 | |
Jon Paul Maloy | 37e2216 | 2014-05-14 05:39:12 -0400 | [diff] [blame] | 406 | if (n_ptr->bclink.reasm_buf) { |
| 407 | kfree_skb(n_ptr->bclink.reasm_buf); |
| 408 | n_ptr->bclink.reasm_buf = NULL; |
Allan Stephens | c5bd4d8 | 2011-04-07 11:58:08 -0400 | [diff] [blame] | 409 | } |
| 410 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 411 | tipc_bclink_remove_node(n_ptr->net, n_ptr->addr); |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 412 | tipc_bclink_acknowledge(n_ptr, INVALID_LINK_SEQ); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 413 | |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 414 | n_ptr->bclink.recv_permitted = false; |
Allan Stephens | c5bd4d8 | 2011-04-07 11:58:08 -0400 | [diff] [blame] | 415 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 416 | |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 417 | /* Abort any ongoing link failover */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 418 | for (i = 0; i < MAX_BEARERS; i++) { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 419 | struct tipc_link *l_ptr = n_ptr->links[i].link; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 420 | if (!l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 421 | continue; |
Jon Paul Maloy | dff29b1 | 2015-04-02 09:33:01 -0400 | [diff] [blame] | 422 | l_ptr->flags &= ~LINK_FAILINGOVER; |
| 423 | l_ptr->failover_checkpt = 0; |
| 424 | l_ptr->failover_pkts = 0; |
| 425 | kfree_skb(l_ptr->failover_skb); |
| 426 | l_ptr->failover_skb = NULL; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 427 | tipc_link_reset_fragments(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 428 | } |
| 429 | |
Ying Xue | ca9cf06 | 2014-05-08 08:54:40 +0800 | [diff] [blame] | 430 | n_ptr->action_flags &= ~TIPC_WAIT_OWN_LINKS_DOWN; |
| 431 | |
Jon Paul Maloy | 708ac32 | 2015-02-05 08:36:42 -0500 | [diff] [blame] | 432 | /* Prevent re-contact with node until cleanup is done */ |
| 433 | n_ptr->action_flags |= TIPC_WAIT_PEER_LINKS_DOWN; |
| 434 | |
| 435 | /* Notify publications from this node */ |
| 436 | n_ptr->action_flags |= TIPC_NOTIFY_NODE_DOWN; |
| 437 | |
| 438 | /* Notify sockets connected to node */ |
| 439 | list_for_each_entry_safe(conn, safe, conns, list) { |
| 440 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, |
| 441 | SHORT_H_SIZE, 0, tn->own_addr, |
| 442 | conn->peer_node, conn->port, |
| 443 | conn->peer_port, TIPC_ERR_NO_NODE); |
| 444 | if (likely(skb)) { |
| 445 | skb_queue_tail(n_ptr->inputq, skb); |
| 446 | n_ptr->action_flags |= TIPC_MSG_EVT; |
| 447 | } |
| 448 | list_del(&conn->list); |
| 449 | kfree(conn); |
| 450 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 451 | } |
| 452 | |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 453 | /** |
| 454 | * tipc_node_get_linkname - get the name of a link |
| 455 | * |
| 456 | * @bearer_id: id of the bearer |
| 457 | * @node: peer node address |
| 458 | * @linkname: link name output buffer |
| 459 | * |
| 460 | * Returns 0 on success |
| 461 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 462 | int tipc_node_get_linkname(struct net *net, u32 bearer_id, u32 addr, |
| 463 | char *linkname, size_t len) |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 464 | { |
| 465 | struct tipc_link *link; |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 466 | int err = -EINVAL; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 467 | struct tipc_node *node = tipc_node_find(net, addr); |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 468 | |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 469 | if (!node) |
| 470 | return err; |
| 471 | |
| 472 | if (bearer_id >= MAX_BEARERS) |
| 473 | goto exit; |
| 474 | |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 475 | tipc_node_lock(node); |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 476 | link = node->links[bearer_id].link; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 477 | if (link) { |
| 478 | strncpy(linkname, link->name, len); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 479 | err = 0; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 480 | } |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 481 | exit: |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 482 | tipc_node_unlock(node); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 483 | tipc_node_put(node); |
| 484 | return err; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 485 | } |
Ying Xue | 9db9fdd | 2014-05-05 08:56:12 +0800 | [diff] [blame] | 486 | |
| 487 | void tipc_node_unlock(struct tipc_node *node) |
| 488 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 489 | struct net *net = node->net; |
Ying Xue | ca0c427 | 2014-05-05 08:56:14 +0800 | [diff] [blame] | 490 | u32 addr = 0; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 491 | u32 flags = node->action_flags; |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 492 | u32 link_id = 0; |
Jon Paul Maloy | 708ac32 | 2015-02-05 08:36:42 -0500 | [diff] [blame] | 493 | struct list_head *publ_list; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 494 | struct sk_buff_head *inputq = node->inputq; |
Jon Paul Maloy | 708ac32 | 2015-02-05 08:36:42 -0500 | [diff] [blame] | 495 | struct sk_buff_head *namedq; |
Ying Xue | 9db9fdd | 2014-05-05 08:56:12 +0800 | [diff] [blame] | 496 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 497 | if (likely(!flags || (flags == TIPC_MSG_EVT))) { |
| 498 | node->action_flags = 0; |
Ying Xue | 9db9fdd | 2014-05-05 08:56:12 +0800 | [diff] [blame] | 499 | spin_unlock_bh(&node->lock); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 500 | if (flags == TIPC_MSG_EVT) |
| 501 | tipc_sk_rcv(net, inputq); |
Ying Xue | 9db9fdd | 2014-05-05 08:56:12 +0800 | [diff] [blame] | 502 | return; |
| 503 | } |
| 504 | |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 505 | addr = node->addr; |
| 506 | link_id = node->link_id; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 507 | namedq = node->namedq; |
Jon Paul Maloy | 708ac32 | 2015-02-05 08:36:42 -0500 | [diff] [blame] | 508 | publ_list = &node->publ_list; |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 509 | |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 510 | node->action_flags &= ~(TIPC_MSG_EVT | |
| 511 | TIPC_NOTIFY_NODE_DOWN | TIPC_NOTIFY_NODE_UP | |
| 512 | TIPC_NOTIFY_LINK_DOWN | TIPC_NOTIFY_LINK_UP | |
| 513 | TIPC_WAKEUP_BCAST_USERS | TIPC_BCAST_MSG_EVT | |
Ying Xue | b952b2b | 2015-03-26 18:10:23 +0800 | [diff] [blame] | 514 | TIPC_NAMED_MSG_EVT | TIPC_BCAST_RESET); |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 515 | |
Ying Xue | 9db9fdd | 2014-05-05 08:56:12 +0800 | [diff] [blame] | 516 | spin_unlock_bh(&node->lock); |
| 517 | |
Jon Paul Maloy | 708ac32 | 2015-02-05 08:36:42 -0500 | [diff] [blame] | 518 | if (flags & TIPC_NOTIFY_NODE_DOWN) |
| 519 | tipc_publ_notify(net, publ_list, addr); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 520 | |
Jon Maloy | 908344c | 2014-10-07 14:12:34 -0400 | [diff] [blame] | 521 | if (flags & TIPC_WAKEUP_BCAST_USERS) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 522 | tipc_bclink_wakeup_users(net); |
Jon Maloy | 908344c | 2014-10-07 14:12:34 -0400 | [diff] [blame] | 523 | |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 524 | if (flags & TIPC_NOTIFY_NODE_UP) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 525 | tipc_named_node_up(net, addr); |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 526 | |
| 527 | if (flags & TIPC_NOTIFY_LINK_UP) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 528 | tipc_nametbl_publish(net, TIPC_LINK_STATE, addr, addr, |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 529 | TIPC_NODE_SCOPE, link_id, addr); |
| 530 | |
| 531 | if (flags & TIPC_NOTIFY_LINK_DOWN) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 532 | tipc_nametbl_withdraw(net, TIPC_LINK_STATE, addr, |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 533 | link_id, addr); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 534 | |
| 535 | if (flags & TIPC_MSG_EVT) |
| 536 | tipc_sk_rcv(net, inputq); |
| 537 | |
| 538 | if (flags & TIPC_NAMED_MSG_EVT) |
| 539 | tipc_named_rcv(net, namedq); |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 540 | |
| 541 | if (flags & TIPC_BCAST_MSG_EVT) |
| 542 | tipc_bclink_input(net); |
Ying Xue | b952b2b | 2015-03-26 18:10:23 +0800 | [diff] [blame] | 543 | |
| 544 | if (flags & TIPC_BCAST_RESET) |
| 545 | tipc_link_reset_all(node); |
Ying Xue | 9db9fdd | 2014-05-05 08:56:12 +0800 | [diff] [blame] | 546 | } |
Richard Alpe | 3e4b6ab | 2014-11-20 10:29:17 +0100 | [diff] [blame] | 547 | |
| 548 | /* Caller should hold node lock for the passed node */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 549 | static int __tipc_nl_add_node(struct tipc_nl_msg *msg, struct tipc_node *node) |
Richard Alpe | 3e4b6ab | 2014-11-20 10:29:17 +0100 | [diff] [blame] | 550 | { |
| 551 | void *hdr; |
| 552 | struct nlattr *attrs; |
| 553 | |
Richard Alpe | bfb3e5d | 2015-02-09 09:50:03 +0100 | [diff] [blame] | 554 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
Richard Alpe | 3e4b6ab | 2014-11-20 10:29:17 +0100 | [diff] [blame] | 555 | NLM_F_MULTI, TIPC_NL_NODE_GET); |
| 556 | if (!hdr) |
| 557 | return -EMSGSIZE; |
| 558 | |
| 559 | attrs = nla_nest_start(msg->skb, TIPC_NLA_NODE); |
| 560 | if (!attrs) |
| 561 | goto msg_full; |
| 562 | |
| 563 | if (nla_put_u32(msg->skb, TIPC_NLA_NODE_ADDR, node->addr)) |
| 564 | goto attr_msg_full; |
| 565 | if (tipc_node_is_up(node)) |
| 566 | if (nla_put_flag(msg->skb, TIPC_NLA_NODE_UP)) |
| 567 | goto attr_msg_full; |
| 568 | |
| 569 | nla_nest_end(msg->skb, attrs); |
| 570 | genlmsg_end(msg->skb, hdr); |
| 571 | |
| 572 | return 0; |
| 573 | |
| 574 | attr_msg_full: |
| 575 | nla_nest_cancel(msg->skb, attrs); |
| 576 | msg_full: |
| 577 | genlmsg_cancel(msg->skb, hdr); |
| 578 | |
| 579 | return -EMSGSIZE; |
| 580 | } |
| 581 | |
| 582 | int tipc_nl_node_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 583 | { |
| 584 | int err; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 585 | struct net *net = sock_net(skb->sk); |
| 586 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 3e4b6ab | 2014-11-20 10:29:17 +0100 | [diff] [blame] | 587 | int done = cb->args[0]; |
| 588 | int last_addr = cb->args[1]; |
| 589 | struct tipc_node *node; |
| 590 | struct tipc_nl_msg msg; |
| 591 | |
| 592 | if (done) |
| 593 | return 0; |
| 594 | |
| 595 | msg.skb = skb; |
| 596 | msg.portid = NETLINK_CB(cb->skb).portid; |
| 597 | msg.seq = cb->nlh->nlmsg_seq; |
| 598 | |
| 599 | rcu_read_lock(); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 600 | if (last_addr) { |
| 601 | node = tipc_node_find(net, last_addr); |
| 602 | if (!node) { |
| 603 | rcu_read_unlock(); |
| 604 | /* We never set seq or call nl_dump_check_consistent() |
| 605 | * this means that setting prev_seq here will cause the |
| 606 | * consistence check to fail in the netlink callback |
| 607 | * handler. Resulting in the NLMSG_DONE message having |
| 608 | * the NLM_F_DUMP_INTR flag set if the node state |
| 609 | * changed while we released the lock. |
| 610 | */ |
| 611 | cb->prev_seq = 1; |
| 612 | return -EPIPE; |
| 613 | } |
| 614 | tipc_node_put(node); |
Richard Alpe | 3e4b6ab | 2014-11-20 10:29:17 +0100 | [diff] [blame] | 615 | } |
| 616 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 617 | list_for_each_entry_rcu(node, &tn->node_list, list) { |
Richard Alpe | 3e4b6ab | 2014-11-20 10:29:17 +0100 | [diff] [blame] | 618 | if (last_addr) { |
| 619 | if (node->addr == last_addr) |
| 620 | last_addr = 0; |
| 621 | else |
| 622 | continue; |
| 623 | } |
| 624 | |
| 625 | tipc_node_lock(node); |
| 626 | err = __tipc_nl_add_node(&msg, node); |
| 627 | if (err) { |
| 628 | last_addr = node->addr; |
| 629 | tipc_node_unlock(node); |
| 630 | goto out; |
| 631 | } |
| 632 | |
| 633 | tipc_node_unlock(node); |
| 634 | } |
| 635 | done = 1; |
| 636 | out: |
| 637 | cb->args[0] = done; |
| 638 | cb->args[1] = last_addr; |
| 639 | rcu_read_unlock(); |
| 640 | |
| 641 | return skb->len; |
| 642 | } |