Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/bcast.c: TIPC broadcast code |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Jon Paul Maloy | 3c724ac | 2015-02-05 08:36:43 -0500 | [diff] [blame] | 4 | * Copyright (c) 2004-2006, 2014-2015, Ericsson AB |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 5 | * Copyright (c) 2004, Intel Corporation. |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 6 | * Copyright (c) 2005, 2010-2011, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 7 | * All rights reserved. |
| 8 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 9 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 10 | * modification, are permitted provided that the following conditions are met: |
| 11 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the names of the copyright holders nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived from |
| 19 | * this software without specific prior written permission. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 20 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 21 | * Alternatively, this software may be distributed under the terms of the |
| 22 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 23 | * Software Foundation. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 34 | * 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] | 35 | * POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 38 | #include <linux/tipc_config.h> |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 39 | #include "socket.h" |
| 40 | #include "msg.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 41 | #include "bcast.h" |
Allan Stephens | 9f6bdcd4 | 2011-04-07 14:57:53 -0400 | [diff] [blame] | 42 | #include "name_distr.h" |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 43 | #include "link.h" |
| 44 | #include "node.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 45 | |
Ying Xue | 987b58b | 2014-03-27 12:54:35 +0800 | [diff] [blame] | 46 | #define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */ |
Jon Paul Maloy | 53387c4 | 2015-10-19 09:21:37 -0400 | [diff] [blame] | 47 | #define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */ |
| 48 | #define BCLINK_WIN_MIN 32 /* bcast minimum link window size */ |
Allan Stephens | c47e9b9 | 2011-10-24 10:29:26 -0400 | [diff] [blame] | 49 | |
Allan Stephens | 3aec9cc | 2010-05-11 14:30:07 +0000 | [diff] [blame] | 50 | const char tipc_bclink_name[] = "broadcast-link"; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 51 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 52 | /** |
| 53 | * struct tipc_bcbearer_pair - a pair of bearers used by broadcast link |
| 54 | * @primary: pointer to primary bearer |
| 55 | * @secondary: pointer to secondary bearer |
| 56 | * |
| 57 | * Bearers must have same priority and same set of reachable destinations |
| 58 | * to be paired. |
| 59 | */ |
| 60 | |
| 61 | struct tipc_bcbearer_pair { |
| 62 | struct tipc_bearer *primary; |
| 63 | struct tipc_bearer *secondary; |
| 64 | }; |
| 65 | |
| 66 | #define BCBEARER MAX_BEARERS |
| 67 | |
| 68 | /** |
| 69 | * struct tipc_bcbearer - bearer used by broadcast link |
| 70 | * @bearer: (non-standard) broadcast bearer structure |
| 71 | * @media: (non-standard) broadcast media structure |
| 72 | * @bpairs: array of bearer pairs |
| 73 | * @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort() |
| 74 | * @remains: temporary node map used by tipc_bcbearer_send() |
| 75 | * @remains_new: temporary node map used tipc_bcbearer_send() |
| 76 | * |
| 77 | * Note: The fields labelled "temporary" are incorporated into the bearer |
| 78 | * to avoid consuming potentially limited stack space through the use of |
| 79 | * large local variables within multicast routines. Concurrent access is |
| 80 | * prevented through use of the spinlock "bcast_lock". |
| 81 | */ |
| 82 | struct tipc_bcbearer { |
| 83 | struct tipc_bearer bearer; |
| 84 | struct tipc_media media; |
| 85 | struct tipc_bcbearer_pair bpairs[MAX_BEARERS]; |
| 86 | struct tipc_bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1]; |
| 87 | struct tipc_node_map remains; |
| 88 | struct tipc_node_map remains_new; |
| 89 | }; |
| 90 | |
| 91 | /** |
| 92 | * struct tipc_bc_base - link used for broadcast messages |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 93 | * @link: (non-standard) broadcast link structure |
| 94 | * @node: (non-standard) node structure representing b'cast link's peer node |
| 95 | * @bcast_nodes: map of broadcast-capable nodes |
| 96 | * @retransmit_to: node that most recently requested a retransmit |
| 97 | * |
| 98 | * Handles sequence numbering, fragmentation, bundling, etc. |
| 99 | */ |
| 100 | struct tipc_bc_base { |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 101 | struct tipc_link link; |
| 102 | struct tipc_node node; |
| 103 | struct sk_buff_head arrvq; |
| 104 | struct sk_buff_head inputq; |
| 105 | struct tipc_node_map bcast_nodes; |
| 106 | struct tipc_node *retransmit_to; |
| 107 | }; |
| 108 | |
Jon Paul Maloy | 5fd9fd6 | 2015-10-22 08:51:35 -0400 | [diff] [blame^] | 109 | static struct tipc_bc_base *tipc_bc_base(struct net *net) |
| 110 | { |
| 111 | return tipc_net(net)->bcbase; |
| 112 | } |
| 113 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 114 | /** |
| 115 | * tipc_nmap_equal - test for equality of node maps |
| 116 | */ |
| 117 | static int tipc_nmap_equal(struct tipc_node_map *nm_a, |
| 118 | struct tipc_node_map *nm_b) |
| 119 | { |
| 120 | return !memcmp(nm_a, nm_b, sizeof(*nm_a)); |
| 121 | } |
| 122 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 123 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
| 124 | struct tipc_node_map *nm_b, |
| 125 | struct tipc_node_map *nm_diff); |
Ying Xue | 28dd941 | 2014-04-21 10:55:51 +0800 | [diff] [blame] | 126 | static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node); |
| 127 | static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 128 | static void tipc_bclink_lock(struct net *net) |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 129 | { |
Jon Paul Maloy | 0043550 | 2015-10-22 08:51:34 -0400 | [diff] [blame] | 130 | tipc_bcast_lock(net); |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 131 | } |
| 132 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 133 | static void tipc_bclink_unlock(struct net *net) |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 134 | { |
Jon Paul Maloy | 0043550 | 2015-10-22 08:51:34 -0400 | [diff] [blame] | 135 | tipc_bcast_unlock(net); |
Ying Xue | 3f5a12b | 2014-05-05 08:56:17 +0800 | [diff] [blame] | 136 | } |
| 137 | |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 138 | void tipc_bclink_input(struct net *net) |
| 139 | { |
| 140 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 141 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 142 | tipc_sk_mcast_rcv(net, &tn->bcbase->arrvq, &tn->bcbase->inputq); |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 143 | } |
| 144 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 145 | uint tipc_bcast_get_mtu(void) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 146 | { |
| 147 | return MAX_PKT_DEFAULT_MCAST; |
| 148 | } |
| 149 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 150 | static u32 bcbuf_acks(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 151 | { |
David S. Miller | 880b005 | 2006-01-12 13:22:32 -0800 | [diff] [blame] | 152 | return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 153 | } |
| 154 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 155 | static void bcbuf_set_acks(struct sk_buff *buf, u32 acks) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 156 | { |
David S. Miller | 880b005 | 2006-01-12 13:22:32 -0800 | [diff] [blame] | 157 | TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 158 | } |
| 159 | |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 160 | static void bcbuf_decr_acks(struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 161 | { |
| 162 | bcbuf_set_acks(buf, bcbuf_acks(buf) - 1); |
| 163 | } |
| 164 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 165 | void tipc_bclink_add_node(struct net *net, u32 addr) |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 166 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 167 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 168 | |
| 169 | tipc_bclink_lock(net); |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 170 | tipc_nmap_add(&tn->bcbase->bcast_nodes, addr); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 171 | tipc_bclink_unlock(net); |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 172 | } |
| 173 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 174 | void tipc_bclink_remove_node(struct net *net, u32 addr) |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 175 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 176 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 177 | |
| 178 | tipc_bclink_lock(net); |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 179 | tipc_nmap_remove(&tn->bcbase->bcast_nodes, addr); |
Jon Paul Maloy | 7d967b6 | 2015-06-28 09:44:44 -0400 | [diff] [blame] | 180 | |
| 181 | /* Last node? => reset backlog queue */ |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 182 | if (!tn->bcbase->bcast_nodes.count) |
| 183 | tipc_link_purge_backlog(&tn->bcbase->link); |
Jon Paul Maloy | 7d967b6 | 2015-06-28 09:44:44 -0400 | [diff] [blame] | 184 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 185 | tipc_bclink_unlock(net); |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 186 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 187 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 188 | static void bclink_set_last_sent(struct net *net) |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 189 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 190 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 191 | struct tipc_link *bcl = tn->bcl; |
| 192 | |
Jon Paul Maloy | dd3f9e7 | 2015-05-14 10:46:18 -0400 | [diff] [blame] | 193 | bcl->silent_intv_cnt = mod(bcl->snd_nxt - 1); |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 194 | } |
| 195 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 196 | u32 tipc_bclink_get_last_sent(struct net *net) |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 197 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 198 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 199 | |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 200 | return tn->bcl->silent_intv_cnt; |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 201 | } |
| 202 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 203 | static void bclink_update_last_sent(struct tipc_node *node, u32 seqno) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 204 | { |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 205 | node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ? |
| 206 | seqno : node->bclink.last_sent; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 207 | } |
| 208 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 209 | /** |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 210 | * tipc_bclink_retransmit_to - get most recent node to request retransmission |
| 211 | * |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 212 | * Called with bclink_lock locked |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 213 | */ |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 214 | struct tipc_node *tipc_bclink_retransmit_to(struct net *net) |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 215 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 216 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 217 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 218 | return tn->bcbase->retransmit_to; |
Allan Stephens | 01d83ed | 2011-01-18 13:53:16 -0500 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 222 | * bclink_retransmit_pkt - retransmit broadcast packets |
| 223 | * @after: sequence number of last packet to *not* retransmit |
| 224 | * @to: sequence number of last packet to retransmit |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 225 | * |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 226 | * Called with bclink_lock locked |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 227 | */ |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 228 | static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 229 | { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 230 | struct sk_buff *skb; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 231 | struct tipc_link *bcl = tn->bcl; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 232 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 233 | skb_queue_walk(&bcl->transmq, skb) { |
Jon Maloy | 703068e | 2015-01-09 15:26:58 +0800 | [diff] [blame] | 234 | if (more(buf_seqno(skb), after)) { |
| 235 | tipc_link_retransmit(bcl, skb, mod(to - after)); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 236 | break; |
Jon Maloy | 703068e | 2015-01-09 15:26:58 +0800 | [diff] [blame] | 237 | } |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 238 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 239 | } |
| 240 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 241 | /** |
Kolmakov Dmitriy | 7845989 | 2015-09-07 09:05:48 +0000 | [diff] [blame] | 242 | * bclink_prepare_wakeup - prepare users for wakeup after congestion |
| 243 | * @bcl: broadcast link |
| 244 | * @resultq: queue for users which can be woken up |
| 245 | * Move a number of waiting users, as permitted by available space in |
| 246 | * the send queue, from link wait queue to specified queue for wakeup |
| 247 | */ |
| 248 | static void bclink_prepare_wakeup(struct tipc_link *bcl, struct sk_buff_head *resultq) |
| 249 | { |
| 250 | int pnd[TIPC_SYSTEM_IMPORTANCE + 1] = {0,}; |
| 251 | int imp, lim; |
| 252 | struct sk_buff *skb, *tmp; |
| 253 | |
| 254 | skb_queue_walk_safe(&bcl->wakeupq, skb, tmp) { |
| 255 | imp = TIPC_SKB_CB(skb)->chain_imp; |
| 256 | lim = bcl->window + bcl->backlog[imp].limit; |
| 257 | pnd[imp] += TIPC_SKB_CB(skb)->chain_sz; |
| 258 | if ((pnd[imp] + bcl->backlog[imp].len) >= lim) |
| 259 | continue; |
| 260 | skb_unlink(skb, &bcl->wakeupq); |
| 261 | skb_queue_tail(resultq, skb); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | /** |
Jon Maloy | 908344c | 2014-10-07 14:12:34 -0400 | [diff] [blame] | 266 | * tipc_bclink_wakeup_users - wake up pending users |
| 267 | * |
| 268 | * Called with no locks taken |
| 269 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 270 | void tipc_bclink_wakeup_users(struct net *net) |
Jon Maloy | 908344c | 2014-10-07 14:12:34 -0400 | [diff] [blame] | 271 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 272 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Kolmakov Dmitriy | 7845989 | 2015-09-07 09:05:48 +0000 | [diff] [blame] | 273 | struct tipc_link *bcl = tn->bcl; |
| 274 | struct sk_buff_head resultq; |
Erik Hugne | 4988bb4 | 2014-12-03 16:58:40 +0100 | [diff] [blame] | 275 | |
Kolmakov Dmitriy | 7845989 | 2015-09-07 09:05:48 +0000 | [diff] [blame] | 276 | skb_queue_head_init(&resultq); |
| 277 | bclink_prepare_wakeup(bcl, &resultq); |
| 278 | tipc_sk_rcv(net, &resultq); |
Jon Maloy | 908344c | 2014-10-07 14:12:34 -0400 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 282 | * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 283 | * @n_ptr: node that sent acknowledgement info |
| 284 | * @acked: broadcast sequence # that has been acknowledged |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 285 | * |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 286 | * Node is locked, bclink_lock unlocked. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 287 | */ |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 288 | void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 289 | { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 290 | struct sk_buff *skb, *tmp; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 291 | unsigned int released = 0; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 292 | struct net *net = n_ptr->net; |
| 293 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 294 | |
Jon Paul Maloy | 2cdf391 | 2015-03-13 16:08:09 -0400 | [diff] [blame] | 295 | if (unlikely(!n_ptr->bclink.recv_permitted)) |
| 296 | return; |
| 297 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 298 | tipc_bclink_lock(net); |
Jon Paul Maloy | 2cdf391 | 2015-03-13 16:08:09 -0400 | [diff] [blame] | 299 | |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 300 | /* Bail out if tx queue is empty (no clean up is required) */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 301 | skb = skb_peek(&tn->bcl->transmq); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 302 | if (!skb) |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 303 | goto exit; |
| 304 | |
| 305 | /* Determine which messages need to be acknowledged */ |
| 306 | if (acked == INVALID_LINK_SEQ) { |
| 307 | /* |
| 308 | * Contact with specified node has been lost, so need to |
| 309 | * acknowledge sent messages only (if other nodes still exist) |
| 310 | * or both sent and unsent messages (otherwise) |
| 311 | */ |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 312 | if (tn->bcbase->bcast_nodes.count) |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 313 | acked = tn->bcl->silent_intv_cnt; |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 314 | else |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 315 | acked = tn->bcl->snd_nxt; |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 316 | } else { |
| 317 | /* |
| 318 | * Bail out if specified sequence number does not correspond |
| 319 | * to a message that has been sent and not yet acknowledged |
| 320 | */ |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 321 | if (less(acked, buf_seqno(skb)) || |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 322 | less(tn->bcl->silent_intv_cnt, acked) || |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 323 | less_eq(acked, n_ptr->bclink.acked)) |
| 324 | goto exit; |
| 325 | } |
| 326 | |
| 327 | /* Skip over packets that node has previously acknowledged */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 328 | skb_queue_walk(&tn->bcl->transmq, skb) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 329 | if (more(buf_seqno(skb), n_ptr->bclink.acked)) |
| 330 | break; |
| 331 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 332 | |
| 333 | /* Update packets that node is now acknowledging */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 334 | skb_queue_walk_from_safe(&tn->bcl->transmq, skb, tmp) { |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 335 | if (more(buf_seqno(skb), acked)) |
| 336 | break; |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 337 | bcbuf_decr_acks(skb); |
| 338 | bclink_set_last_sent(net); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 339 | if (bcbuf_acks(skb) == 0) { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 340 | __skb_unlink(skb, &tn->bcl->transmq); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 341 | kfree_skb(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 342 | released = 1; |
| 343 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 344 | } |
| 345 | n_ptr->bclink.acked = acked; |
| 346 | |
| 347 | /* Try resolving broadcast link congestion, if necessary */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 348 | if (unlikely(skb_peek(&tn->bcl->backlogq))) { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 349 | tipc_link_push_packets(tn->bcl); |
| 350 | bclink_set_last_sent(net); |
Allan Stephens | 5b1f7bd | 2010-08-17 11:00:09 +0000 | [diff] [blame] | 351 | } |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 352 | if (unlikely(released && !skb_queue_empty(&tn->bcl->wakeupq))) |
Jon Maloy | 908344c | 2014-10-07 14:12:34 -0400 | [diff] [blame] | 353 | n_ptr->action_flags |= TIPC_WAKEUP_BCAST_USERS; |
Allan Stephens | 36559591 | 2011-10-24 15:26:24 -0400 | [diff] [blame] | 354 | exit: |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 355 | tipc_bclink_unlock(net); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 356 | } |
| 357 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 358 | /** |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 359 | * tipc_bclink_update_link_state - update broadcast link state |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 360 | * |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 361 | * RCU and node lock set |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 362 | */ |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 363 | void tipc_bclink_update_link_state(struct tipc_node *n_ptr, |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 364 | u32 last_sent) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 365 | { |
| 366 | struct sk_buff *buf; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 367 | struct net *net = n_ptr->net; |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 368 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 369 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 370 | /* Ignore "stale" link state info */ |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 371 | if (less_eq(last_sent, n_ptr->bclink.last_in)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 372 | return; |
| 373 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 374 | /* Update link synchronization state; quit if in sync */ |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 375 | bclink_update_last_sent(n_ptr, last_sent); |
| 376 | |
| 377 | if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in) |
| 378 | return; |
| 379 | |
| 380 | /* Update out-of-sync state; quit if loss is still unconfirmed */ |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 381 | if ((++n_ptr->bclink.oos_state) == 1) { |
| 382 | if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2)) |
| 383 | return; |
| 384 | n_ptr->bclink.oos_state++; |
| 385 | } |
| 386 | |
| 387 | /* Don't NACK if one has been recently sent (or seen) */ |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 388 | if (n_ptr->bclink.oos_state & 0x1) |
| 389 | return; |
| 390 | |
| 391 | /* Send NACK */ |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 392 | buf = tipc_buf_acquire(INT_H_SIZE); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 393 | if (buf) { |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 394 | struct tipc_msg *msg = buf_msg(buf); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 395 | struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferdq); |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 396 | u32 to = skb ? buf_seqno(skb) - 1 : n_ptr->bclink.last_sent; |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 397 | |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 398 | tipc_msg_init(tn->own_addr, msg, BCAST_PROTOCOL, STATE_MSG, |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 399 | INT_H_SIZE, n_ptr->addr); |
Allan Stephens | bf781ec | 2011-01-25 16:12:39 -0500 | [diff] [blame] | 400 | msg_set_non_seq(msg, 1); |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 401 | msg_set_mc_netid(msg, tn->net_id); |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 402 | msg_set_bcast_ack(msg, n_ptr->bclink.last_in); |
| 403 | msg_set_bcgap_after(msg, n_ptr->bclink.last_in); |
Ying Xue | bc6fecd | 2014-11-26 11:41:53 +0800 | [diff] [blame] | 404 | msg_set_bcgap_to(msg, to); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 405 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 406 | tipc_bclink_lock(net); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 407 | tipc_bearer_send(net, MAX_BEARERS, buf, NULL); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 408 | tn->bcl->stats.sent_nacks++; |
| 409 | tipc_bclink_unlock(net); |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 410 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 411 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 412 | n_ptr->bclink.oos_state++; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 413 | } |
| 414 | } |
| 415 | |
Jon Paul Maloy | d999297 | 2015-07-16 16:54:31 -0400 | [diff] [blame] | 416 | void tipc_bclink_sync_state(struct tipc_node *n, struct tipc_msg *hdr) |
| 417 | { |
| 418 | u16 last = msg_last_bcast(hdr); |
| 419 | int mtyp = msg_type(hdr); |
| 420 | |
| 421 | if (unlikely(msg_user(hdr) != LINK_PROTOCOL)) |
| 422 | return; |
| 423 | if (mtyp == STATE_MSG) { |
| 424 | tipc_bclink_update_link_state(n, last); |
| 425 | return; |
| 426 | } |
| 427 | /* Compatibility: older nodes don't know BCAST_PROTOCOL synchronization, |
| 428 | * and transfer synch info in LINK_PROTOCOL messages. |
| 429 | */ |
| 430 | if (tipc_node_is_up(n)) |
| 431 | return; |
| 432 | if ((mtyp != RESET_MSG) && (mtyp != ACTIVATE_MSG)) |
| 433 | return; |
| 434 | n->bclink.last_sent = last; |
| 435 | n->bclink.last_in = last; |
| 436 | n->bclink.oos_state = 0; |
| 437 | } |
| 438 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 439 | /** |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 440 | * bclink_peek_nack - monitor retransmission requests sent by other nodes |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 441 | * |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 442 | * Delay any upcoming NACK by this node if another node has already |
| 443 | * requested the first message this node is going to ask for. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 444 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 445 | static void bclink_peek_nack(struct net *net, struct tipc_msg *msg) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 446 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 447 | struct tipc_node *n_ptr = tipc_node_find(net, msg_destnode(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 448 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 449 | if (unlikely(!n_ptr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 450 | return; |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 451 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 452 | tipc_node_lock(n_ptr); |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 453 | if (n_ptr->bclink.recv_permitted && |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 454 | (n_ptr->bclink.last_in != n_ptr->bclink.last_sent) && |
| 455 | (n_ptr->bclink.last_in == msg_bcgap_after(msg))) |
| 456 | n_ptr->bclink.oos_state = 2; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 457 | tipc_node_unlock(n_ptr); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 458 | tipc_node_put(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 459 | } |
| 460 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 461 | /* tipc_bcast_xmit - deliver buffer chain to all nodes in cluster |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 462 | * and to identified node local sockets |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 463 | * @net: the applicable net namespace |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 464 | * @list: chain of buffers containing message |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 465 | * Consumes the buffer chain, except when returning -ELINKCONG |
| 466 | * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE |
| 467 | */ |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 468 | int tipc_bcast_xmit(struct net *net, struct sk_buff_head *list) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 469 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 470 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 471 | struct tipc_link *bcl = tn->bcl; |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 472 | struct tipc_bc_base *bclink = tn->bcbase; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 473 | int rc = 0; |
| 474 | int bc = 0; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 475 | struct sk_buff *skb; |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 476 | struct sk_buff_head arrvq; |
| 477 | struct sk_buff_head inputq; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 478 | |
| 479 | /* Prepare clone of message for local node */ |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 480 | skb = tipc_msg_reassemble(list); |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 481 | if (unlikely(!skb)) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 482 | return -EHOSTUNREACH; |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 483 | |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 484 | /* Broadcast to all nodes */ |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 485 | if (likely(bclink)) { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 486 | tipc_bclink_lock(net); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 487 | if (likely(bclink->bcast_nodes.count)) { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 488 | rc = __tipc_link_xmit(net, bcl, list); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 489 | if (likely(!rc)) { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 490 | u32 len = skb_queue_len(&bcl->transmq); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 491 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 492 | bclink_set_last_sent(net); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 493 | bcl->stats.queue_sz_counts++; |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 494 | bcl->stats.accu_queue_sz += len; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 495 | } |
| 496 | bc = 1; |
| 497 | } |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 498 | tipc_bclink_unlock(net); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | if (unlikely(!bc)) |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 502 | __skb_queue_purge(list); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 503 | |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 504 | if (unlikely(rc)) { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 505 | kfree_skb(skb); |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 506 | return rc; |
| 507 | } |
| 508 | /* Deliver message clone */ |
| 509 | __skb_queue_head_init(&arrvq); |
| 510 | skb_queue_head_init(&inputq); |
| 511 | __skb_queue_tail(&arrvq, skb); |
| 512 | tipc_sk_mcast_rcv(net, &arrvq, &inputq); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 513 | return rc; |
| 514 | } |
| 515 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 516 | /** |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 517 | * bclink_accept_pkt - accept an incoming, in-sequence broadcast packet |
| 518 | * |
Ying Xue | d69afc9 | 2014-05-05 08:56:15 +0800 | [diff] [blame] | 519 | * Called with both sending node's lock and bclink_lock taken. |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 520 | */ |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 521 | static void bclink_accept_pkt(struct tipc_node *node, u32 seqno) |
| 522 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 523 | struct tipc_net *tn = net_generic(node->net, tipc_net_id); |
| 524 | |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 525 | bclink_update_last_sent(node, seqno); |
| 526 | node->bclink.last_in = seqno; |
| 527 | node->bclink.oos_state = 0; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 528 | tn->bcl->stats.recv_info++; |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 529 | |
| 530 | /* |
| 531 | * Unicast an ACK periodically, ensuring that |
| 532 | * all nodes in the cluster don't ACK at the same time |
| 533 | */ |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 534 | if (((seqno - tn->own_addr) % TIPC_MIN_LINK_WIN) == 0) { |
Jon Paul Maloy | 9d13ec6 | 2015-07-16 16:54:19 -0400 | [diff] [blame] | 535 | tipc_link_proto_xmit(node_active_link(node, node->addr), |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 536 | STATE_MSG, 0, 0, 0, 0); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 537 | tn->bcl->stats.sent_acks++; |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 538 | } |
| 539 | } |
| 540 | |
Ben Hutchings | 2c53040 | 2012-07-10 10:55:09 +0000 | [diff] [blame] | 541 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 542 | * tipc_bclink_rcv - receive a broadcast packet, and deliver upwards |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 543 | * |
Ying Xue | 7216cd9 | 2014-04-21 10:55:48 +0800 | [diff] [blame] | 544 | * RCU is locked, no other locks set |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 545 | */ |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 546 | void tipc_bclink_rcv(struct net *net, struct sk_buff *buf) |
Allan Stephens | d356eeb | 2006-06-25 23:40:01 -0700 | [diff] [blame] | 547 | { |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 548 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 549 | struct tipc_link *bcl = tn->bcl; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 550 | struct tipc_msg *msg = buf_msg(buf); |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 551 | struct tipc_node *node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 552 | u32 next_in; |
| 553 | u32 seqno; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 554 | int deferred = 0; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 555 | int pos = 0; |
| 556 | struct sk_buff *iskb; |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 557 | struct sk_buff_head *arrvq, *inputq; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 558 | |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 559 | /* Screen out unwanted broadcast messages */ |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 560 | if (msg_mc_netid(msg) != tn->net_id) |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 561 | goto exit; |
| 562 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 563 | node = tipc_node_find(net, msg_prevnode(msg)); |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 564 | if (unlikely(!node)) |
| 565 | goto exit; |
| 566 | |
| 567 | tipc_node_lock(node); |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 568 | if (unlikely(!node->bclink.recv_permitted)) |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 569 | goto unlock; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 570 | |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 571 | /* Handle broadcast protocol message */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 572 | if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) { |
Allan Stephens | 9f6bdcd4 | 2011-04-07 14:57:53 -0400 | [diff] [blame] | 573 | if (msg_type(msg) != STATE_MSG) |
| 574 | goto unlock; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 575 | if (msg_destnode(msg) == tn->own_addr) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 576 | tipc_bclink_acknowledge(node, msg_bcast_ack(msg)); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 577 | tipc_bclink_lock(net); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 578 | bcl->stats.recv_nacks++; |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 579 | tn->bcbase->retransmit_to = node; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 580 | bclink_retransmit_pkt(tn, msg_bcgap_after(msg), |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 581 | msg_bcgap_to(msg)); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 582 | tipc_bclink_unlock(net); |
Ying Xue | b952b2b | 2015-03-26 18:10:23 +0800 | [diff] [blame] | 583 | tipc_node_unlock(node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 584 | } else { |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 585 | tipc_node_unlock(node); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 586 | bclink_peek_nack(net, msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 587 | } |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 588 | tipc_node_put(node); |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 589 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 590 | } |
| 591 | |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 592 | /* Handle in-sequence broadcast message */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 593 | seqno = msg_seqno(msg); |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 594 | next_in = mod(node->bclink.last_in + 1); |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 595 | arrvq = &tn->bcbase->arrvq; |
| 596 | inputq = &tn->bcbase->inputq; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 597 | |
| 598 | if (likely(seqno == next_in)) { |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 599 | receive: |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 600 | /* Deliver message to destination */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 601 | if (likely(msg_isdata(msg))) { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 602 | tipc_bclink_lock(net); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 603 | bclink_accept_pkt(node, seqno); |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 604 | spin_lock_bh(&inputq->lock); |
| 605 | __skb_queue_tail(arrvq, buf); |
| 606 | spin_unlock_bh(&inputq->lock); |
| 607 | node->action_flags |= TIPC_BCAST_MSG_EVT; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 608 | tipc_bclink_unlock(net); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 609 | tipc_node_unlock(node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 610 | } else if (msg_user(msg) == MSG_BUNDLER) { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 611 | tipc_bclink_lock(net); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 612 | bclink_accept_pkt(node, seqno); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 613 | bcl->stats.recv_bundles++; |
| 614 | bcl->stats.recv_bundled += msg_msgcnt(msg); |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 615 | pos = 0; |
| 616 | while (tipc_msg_extract(buf, &iskb, &pos)) { |
| 617 | spin_lock_bh(&inputq->lock); |
| 618 | __skb_queue_tail(arrvq, iskb); |
| 619 | spin_unlock_bh(&inputq->lock); |
| 620 | } |
| 621 | node->action_flags |= TIPC_BCAST_MSG_EVT; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 622 | tipc_bclink_unlock(net); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 623 | tipc_node_unlock(node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 624 | } else if (msg_user(msg) == MSG_FRAGMENTER) { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 625 | tipc_bclink_lock(net); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 626 | bclink_accept_pkt(node, seqno); |
Ying Xue | bc14b8d | 2015-03-25 18:09:40 +0800 | [diff] [blame] | 627 | tipc_buf_append(&node->bclink.reasm_buf, &buf); |
| 628 | if (unlikely(!buf && !node->bclink.reasm_buf)) { |
| 629 | tipc_bclink_unlock(net); |
| 630 | goto unlock; |
| 631 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 632 | bcl->stats.recv_fragments++; |
Jon Paul Maloy | 37e2216 | 2014-05-14 05:39:12 -0400 | [diff] [blame] | 633 | if (buf) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 634 | bcl->stats.recv_fragmented++; |
Erik Hugne | 40ba3cd | 2013-11-06 09:28:06 +0100 | [diff] [blame] | 635 | msg = buf_msg(buf); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 636 | tipc_bclink_unlock(net); |
Erik Hugne | 528f6f4 | 2013-11-06 09:28:05 +0100 | [diff] [blame] | 637 | goto receive; |
| 638 | } |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 639 | tipc_bclink_unlock(net); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 640 | tipc_node_unlock(node); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 641 | } else { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 642 | tipc_bclink_lock(net); |
Allan Stephens | 63e7f1a | 2011-10-27 16:43:09 -0400 | [diff] [blame] | 643 | bclink_accept_pkt(node, seqno); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 644 | tipc_bclink_unlock(net); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 645 | tipc_node_unlock(node); |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 646 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 647 | } |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 648 | buf = NULL; |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 649 | |
| 650 | /* Determine new synchronization state */ |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 651 | tipc_node_lock(node); |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 652 | if (unlikely(!tipc_node_is_up(node))) |
| 653 | goto unlock; |
| 654 | |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 655 | if (node->bclink.last_in == node->bclink.last_sent) |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 656 | goto unlock; |
| 657 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 658 | if (skb_queue_empty(&node->bclink.deferdq)) { |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 659 | node->bclink.oos_state = 1; |
| 660 | goto unlock; |
| 661 | } |
| 662 | |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 663 | msg = buf_msg(skb_peek(&node->bclink.deferdq)); |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 664 | seqno = msg_seqno(msg); |
| 665 | next_in = mod(next_in + 1); |
| 666 | if (seqno != next_in) |
| 667 | goto unlock; |
| 668 | |
| 669 | /* Take in-sequence message from deferred queue & deliver it */ |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 670 | buf = __skb_dequeue(&node->bclink.deferdq); |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 671 | goto receive; |
| 672 | } |
| 673 | |
| 674 | /* Handle out-of-sequence broadcast message */ |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 675 | if (less(next_in, seqno)) { |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 676 | deferred = tipc_link_defer_pkt(&node->bclink.deferdq, |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 677 | buf); |
Allan Stephens | 7a54d4a | 2011-10-27 14:17:53 -0400 | [diff] [blame] | 678 | bclink_update_last_sent(node, seqno); |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 679 | buf = NULL; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 680 | } |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 681 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 682 | tipc_bclink_lock(net); |
Allan Stephens | b98158e | 2011-10-26 16:13:35 -0400 | [diff] [blame] | 683 | |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 684 | if (deferred) |
| 685 | bcl->stats.deferred_recv++; |
Allan Stephens | 0232c5a | 2011-10-26 15:57:26 -0400 | [diff] [blame] | 686 | else |
| 687 | bcl->stats.duplicates++; |
Allan Stephens | 8a275a6 | 2011-10-26 15:33:44 -0400 | [diff] [blame] | 688 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 689 | tipc_bclink_unlock(net); |
Allan Stephens | b98158e | 2011-10-26 16:13:35 -0400 | [diff] [blame] | 690 | |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 691 | unlock: |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 692 | tipc_node_unlock(node); |
Ying Xue | 8a0f6eb | 2015-03-26 18:10:24 +0800 | [diff] [blame] | 693 | tipc_node_put(node); |
Allan Stephens | 5d3c488 | 2011-04-07 13:57:25 -0400 | [diff] [blame] | 694 | exit: |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 695 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 696 | } |
| 697 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 698 | u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 699 | { |
Ying Xue | 389dd9b | 2012-11-16 13:51:30 +0800 | [diff] [blame] | 700 | return (n_ptr->bclink.recv_permitted && |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 701 | (tipc_bclink_get_last_sent(n_ptr->net) != n_ptr->bclink.acked)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 702 | } |
| 703 | |
| 704 | |
| 705 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 706 | * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 707 | * |
Allan Stephens | 2ff9f92 | 2011-04-07 10:44:54 -0400 | [diff] [blame] | 708 | * Send packet over as many bearers as necessary to reach all nodes |
| 709 | * that have joined the broadcast link. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 710 | * |
Allan Stephens | 2ff9f92 | 2011-04-07 10:44:54 -0400 | [diff] [blame] | 711 | * Returns 0 (packet sent successfully) under all circumstances, |
| 712 | * since the broadcast link's pseudo-bearer never blocks |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 713 | */ |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 714 | static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf, |
| 715 | struct tipc_bearer *unused1, |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 716 | struct tipc_media_addr *unused2) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 717 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 718 | int bp_index; |
Jon Paul Maloy | 6f92ee5 | 2014-07-16 20:41:04 -0400 | [diff] [blame] | 719 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 720 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 721 | struct tipc_bcbearer *bcbearer = tn->bcbearer; |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 722 | struct tipc_bc_base *bclink = tn->bcbase; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 723 | |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 724 | /* Prepare broadcast link message for reliable transmission, |
Allan Stephens | 2ff9f92 | 2011-04-07 10:44:54 -0400 | [diff] [blame] | 725 | * if first time trying to send it; |
| 726 | * preparation is skipped for broadcast link protocol messages |
| 727 | * since they are sent in an unreliable manner and don't need it |
| 728 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 729 | if (likely(!msg_non_seq(buf_msg(buf)))) { |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 730 | bcbuf_set_acks(buf, bclink->bcast_nodes.count); |
Allan Stephens | 40aecb1 | 2008-06-04 17:54:48 -0700 | [diff] [blame] | 731 | msg_set_non_seq(msg, 1); |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 732 | msg_set_mc_netid(msg, tn->net_id); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 733 | tn->bcl->stats.sent_info++; |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 734 | if (WARN_ON(!bclink->bcast_nodes.count)) { |
Allan Stephens | 5e72690 | 2011-05-23 13:14:18 -0400 | [diff] [blame] | 735 | dump_stack(); |
| 736 | return 0; |
| 737 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 738 | } |
| 739 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 740 | /* Send buffer over bearers until all targets reached */ |
Allan Stephens | cd3decd | 2011-10-24 11:18:12 -0400 | [diff] [blame] | 741 | bcbearer->remains = bclink->bcast_nodes; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 742 | |
| 743 | for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) { |
Allan Stephens | 2d627b9 | 2011-01-07 13:00:11 -0500 | [diff] [blame] | 744 | struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary; |
| 745 | struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary; |
Jon Paul Maloy | 6f92ee5 | 2014-07-16 20:41:04 -0400 | [diff] [blame] | 746 | struct tipc_bearer *bp[2] = {p, s}; |
| 747 | struct tipc_bearer *b = bp[msg_link_selector(msg)]; |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 748 | struct sk_buff *tbuf; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 749 | |
| 750 | if (!p) |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 751 | break; /* No more bearers to try */ |
Jon Paul Maloy | 6f92ee5 | 2014-07-16 20:41:04 -0400 | [diff] [blame] | 752 | if (!b) |
| 753 | b = p; |
Gerlando Falauto | 77861d9 | 2013-05-01 12:04:45 +0000 | [diff] [blame] | 754 | tipc_nmap_diff(&bcbearer->remains, &b->nodes, |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 755 | &bcbearer->remains_new); |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 756 | if (bcbearer->remains_new.count == bcbearer->remains.count) |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 757 | continue; /* Nothing added by bearer pair */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 758 | |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 759 | if (bp_index == 0) { |
| 760 | /* Use original buffer for first bearer */ |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 761 | tipc_bearer_send(net, b->identity, buf, &b->bcast_addr); |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 762 | } else { |
| 763 | /* Avoid concurrent buffer access */ |
Octavian Purdila | bad93e9 | 2014-06-12 01:36:26 +0300 | [diff] [blame] | 764 | tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC); |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 765 | if (!tbuf) |
| 766 | break; |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 767 | tipc_bearer_send(net, b->identity, tbuf, |
| 768 | &b->bcast_addr); |
Gerlando Falauto | 488fc9a | 2013-05-01 12:04:46 +0000 | [diff] [blame] | 769 | kfree_skb(tbuf); /* Bearer keeps a clone */ |
| 770 | } |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 771 | if (bcbearer->remains_new.count == 0) |
Gerlando Falauto | e616071 | 2013-05-01 12:04:44 +0000 | [diff] [blame] | 772 | break; /* All targets reached */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 773 | |
Allan Stephens | 65f51ef | 2006-06-25 23:53:20 -0700 | [diff] [blame] | 774 | bcbearer->remains = bcbearer->remains_new; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 775 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 776 | |
Allan Stephens | 2ff9f92 | 2011-04-07 10:44:54 -0400 | [diff] [blame] | 777 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 778 | } |
| 779 | |
| 780 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 781 | * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 782 | */ |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 783 | void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr, |
| 784 | u32 node, bool action) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 785 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 786 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 787 | struct tipc_bcbearer *bcbearer = tn->bcbearer; |
Paul Gortmaker | 7f9ab6a | 2011-12-29 20:55:27 -0500 | [diff] [blame] | 788 | struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp; |
| 789 | struct tipc_bcbearer_pair *bp_curr; |
Ying Xue | f8322df | 2014-04-21 10:55:45 +0800 | [diff] [blame] | 790 | struct tipc_bearer *b; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 791 | int b_index; |
| 792 | int pri; |
| 793 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 794 | tipc_bclink_lock(net); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 795 | |
Ying Xue | 28dd941 | 2014-04-21 10:55:51 +0800 | [diff] [blame] | 796 | if (action) |
| 797 | tipc_nmap_add(nm_ptr, node); |
| 798 | else |
| 799 | tipc_nmap_remove(nm_ptr, node); |
| 800 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 801 | /* Group bearers by priority (can assume max of two per priority) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 802 | memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp)); |
| 803 | |
Ying Xue | f8322df | 2014-04-21 10:55:45 +0800 | [diff] [blame] | 804 | rcu_read_lock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 805 | for (b_index = 0; b_index < MAX_BEARERS; b_index++) { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 806 | b = rcu_dereference_rtnl(tn->bearer_list[b_index]); |
Ying Xue | f47de12 | 2014-03-27 12:54:34 +0800 | [diff] [blame] | 807 | if (!b || !b->nodes.count) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 808 | continue; |
| 809 | |
| 810 | if (!bp_temp[b->priority].primary) |
| 811 | bp_temp[b->priority].primary = b; |
| 812 | else |
| 813 | bp_temp[b->priority].secondary = b; |
| 814 | } |
Ying Xue | f8322df | 2014-04-21 10:55:45 +0800 | [diff] [blame] | 815 | rcu_read_unlock(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 816 | |
| 817 | /* Create array of bearer pairs for broadcasting */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 818 | bp_curr = bcbearer->bpairs; |
| 819 | memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs)); |
| 820 | |
Per Liden | 16cb4b3 | 2006-01-13 22:22:22 +0100 | [diff] [blame] | 821 | for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 822 | |
| 823 | if (!bp_temp[pri].primary) |
| 824 | continue; |
| 825 | |
| 826 | bp_curr->primary = bp_temp[pri].primary; |
| 827 | |
| 828 | if (bp_temp[pri].secondary) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 829 | if (tipc_nmap_equal(&bp_temp[pri].primary->nodes, |
| 830 | &bp_temp[pri].secondary->nodes)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 831 | bp_curr->secondary = bp_temp[pri].secondary; |
| 832 | } else { |
| 833 | bp_curr++; |
| 834 | bp_curr->primary = bp_temp[pri].secondary; |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | bp_curr++; |
| 839 | } |
| 840 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 841 | tipc_bclink_unlock(net); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 842 | } |
| 843 | |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 844 | static int __tipc_nl_add_bc_link_stat(struct sk_buff *skb, |
| 845 | struct tipc_stats *stats) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 846 | { |
| 847 | int i; |
| 848 | struct nlattr *nest; |
| 849 | |
| 850 | struct nla_map { |
| 851 | __u32 key; |
| 852 | __u32 val; |
| 853 | }; |
| 854 | |
| 855 | struct nla_map map[] = { |
| 856 | {TIPC_NLA_STATS_RX_INFO, stats->recv_info}, |
| 857 | {TIPC_NLA_STATS_RX_FRAGMENTS, stats->recv_fragments}, |
| 858 | {TIPC_NLA_STATS_RX_FRAGMENTED, stats->recv_fragmented}, |
| 859 | {TIPC_NLA_STATS_RX_BUNDLES, stats->recv_bundles}, |
| 860 | {TIPC_NLA_STATS_RX_BUNDLED, stats->recv_bundled}, |
| 861 | {TIPC_NLA_STATS_TX_INFO, stats->sent_info}, |
| 862 | {TIPC_NLA_STATS_TX_FRAGMENTS, stats->sent_fragments}, |
| 863 | {TIPC_NLA_STATS_TX_FRAGMENTED, stats->sent_fragmented}, |
| 864 | {TIPC_NLA_STATS_TX_BUNDLES, stats->sent_bundles}, |
| 865 | {TIPC_NLA_STATS_TX_BUNDLED, stats->sent_bundled}, |
| 866 | {TIPC_NLA_STATS_RX_NACKS, stats->recv_nacks}, |
| 867 | {TIPC_NLA_STATS_RX_DEFERRED, stats->deferred_recv}, |
| 868 | {TIPC_NLA_STATS_TX_NACKS, stats->sent_nacks}, |
| 869 | {TIPC_NLA_STATS_TX_ACKS, stats->sent_acks}, |
| 870 | {TIPC_NLA_STATS_RETRANSMITTED, stats->retransmitted}, |
| 871 | {TIPC_NLA_STATS_DUPLICATES, stats->duplicates}, |
| 872 | {TIPC_NLA_STATS_LINK_CONGS, stats->link_congs}, |
| 873 | {TIPC_NLA_STATS_MAX_QUEUE, stats->max_queue_sz}, |
| 874 | {TIPC_NLA_STATS_AVG_QUEUE, stats->queue_sz_counts ? |
| 875 | (stats->accu_queue_sz / stats->queue_sz_counts) : 0} |
| 876 | }; |
| 877 | |
| 878 | nest = nla_nest_start(skb, TIPC_NLA_LINK_STATS); |
| 879 | if (!nest) |
| 880 | return -EMSGSIZE; |
| 881 | |
| 882 | for (i = 0; i < ARRAY_SIZE(map); i++) |
| 883 | if (nla_put_u32(skb, map[i].key, map[i].val)) |
| 884 | goto msg_full; |
| 885 | |
| 886 | nla_nest_end(skb, nest); |
| 887 | |
| 888 | return 0; |
| 889 | msg_full: |
| 890 | nla_nest_cancel(skb, nest); |
| 891 | |
| 892 | return -EMSGSIZE; |
| 893 | } |
| 894 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 895 | int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 896 | { |
| 897 | int err; |
| 898 | void *hdr; |
| 899 | struct nlattr *attrs; |
| 900 | struct nlattr *prop; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 901 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 902 | struct tipc_link *bcl = tn->bcl; |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 903 | |
| 904 | if (!bcl) |
| 905 | return 0; |
| 906 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 907 | tipc_bclink_lock(net); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 908 | |
Richard Alpe | bfb3e5d | 2015-02-09 09:50:03 +0100 | [diff] [blame] | 909 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 910 | NLM_F_MULTI, TIPC_NL_LINK_GET); |
| 911 | if (!hdr) |
| 912 | return -EMSGSIZE; |
| 913 | |
| 914 | attrs = nla_nest_start(msg->skb, TIPC_NLA_LINK); |
| 915 | if (!attrs) |
| 916 | goto msg_full; |
| 917 | |
| 918 | /* The broadcast link is always up */ |
| 919 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP)) |
| 920 | goto attr_msg_full; |
| 921 | |
| 922 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_BROADCAST)) |
| 923 | goto attr_msg_full; |
| 924 | if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, bcl->name)) |
| 925 | goto attr_msg_full; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 926 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, bcl->rcv_nxt)) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 927 | goto attr_msg_full; |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 928 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, bcl->snd_nxt)) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 929 | goto attr_msg_full; |
| 930 | |
| 931 | prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP); |
| 932 | if (!prop) |
| 933 | goto attr_msg_full; |
Jon Paul Maloy | 1f66d16 | 2015-03-25 12:07:24 -0400 | [diff] [blame] | 934 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->window)) |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 935 | goto prop_msg_full; |
| 936 | nla_nest_end(msg->skb, prop); |
| 937 | |
| 938 | err = __tipc_nl_add_bc_link_stat(msg->skb, &bcl->stats); |
| 939 | if (err) |
| 940 | goto attr_msg_full; |
| 941 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 942 | tipc_bclink_unlock(net); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 943 | nla_nest_end(msg->skb, attrs); |
| 944 | genlmsg_end(msg->skb, hdr); |
| 945 | |
| 946 | return 0; |
| 947 | |
| 948 | prop_msg_full: |
| 949 | nla_nest_cancel(msg->skb, prop); |
| 950 | attr_msg_full: |
| 951 | nla_nest_cancel(msg->skb, attrs); |
| 952 | msg_full: |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 953 | tipc_bclink_unlock(net); |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 954 | genlmsg_cancel(msg->skb, hdr); |
| 955 | |
| 956 | return -EMSGSIZE; |
| 957 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 958 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 959 | int tipc_bclink_reset_stats(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 960 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 961 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 962 | struct tipc_link *bcl = tn->bcl; |
| 963 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 964 | if (!bcl) |
| 965 | return -ENOPROTOOPT; |
| 966 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 967 | tipc_bclink_lock(net); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 968 | memset(&bcl->stats, 0, sizeof(bcl->stats)); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 969 | tipc_bclink_unlock(net); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 970 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 971 | } |
| 972 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 973 | int tipc_bclink_set_queue_limits(struct net *net, u32 limit) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 974 | { |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 975 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 976 | struct tipc_link *bcl = tn->bcl; |
| 977 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 978 | if (!bcl) |
| 979 | return -ENOPROTOOPT; |
Jon Paul Maloy | 53387c4 | 2015-10-19 09:21:37 -0400 | [diff] [blame] | 980 | if (limit < BCLINK_WIN_MIN) |
| 981 | limit = BCLINK_WIN_MIN; |
| 982 | if (limit > TIPC_MAX_LINK_WIN) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 983 | return -EINVAL; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 984 | tipc_bclink_lock(net); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 985 | tipc_link_set_queue_limits(bcl, limit); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 986 | tipc_bclink_unlock(net); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 987 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 988 | } |
| 989 | |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 990 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]) |
| 991 | { |
| 992 | int err; |
| 993 | u32 win; |
| 994 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; |
| 995 | |
| 996 | if (!attrs[TIPC_NLA_LINK_PROP]) |
| 997 | return -EINVAL; |
| 998 | |
| 999 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props); |
| 1000 | if (err) |
| 1001 | return err; |
| 1002 | |
| 1003 | if (!props[TIPC_NLA_PROP_WIN]) |
| 1004 | return -EOPNOTSUPP; |
| 1005 | |
| 1006 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
| 1007 | |
| 1008 | return tipc_bclink_set_queue_limits(net, win); |
| 1009 | } |
| 1010 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 1011 | int tipc_bcast_init(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1012 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1013 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 1014 | struct tipc_bcbearer *bcbearer; |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 1015 | struct tipc_bc_base *bclink; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 1016 | struct tipc_link *bcl; |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1017 | |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 1018 | bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); |
| 1019 | if (!bcbearer) |
| 1020 | return -ENOMEM; |
| 1021 | |
| 1022 | bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); |
| 1023 | if (!bclink) { |
| 1024 | kfree(bcbearer); |
| 1025 | return -ENOMEM; |
| 1026 | } |
| 1027 | |
| 1028 | bcl = &bclink->link; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1029 | bcbearer->bearer.media = &bcbearer->media; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1030 | bcbearer->media.send_msg = tipc_bcbearer_send; |
Allan Stephens | 2e2d9be | 2011-04-07 10:22:31 -0400 | [diff] [blame] | 1031 | sprintf(bcbearer->media.name, "tipc-broadcast"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1032 | |
Jon Paul Maloy | 0043550 | 2015-10-22 08:51:34 -0400 | [diff] [blame] | 1033 | spin_lock_init(&tipc_net(net)->bclock); |
Jon Paul Maloy | 05dcc5a | 2015-03-13 16:08:10 -0400 | [diff] [blame] | 1034 | __skb_queue_head_init(&bcl->transmq); |
| 1035 | __skb_queue_head_init(&bcl->backlogq); |
| 1036 | __skb_queue_head_init(&bcl->deferdq); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1037 | skb_queue_head_init(&bcl->wakeupq); |
Jon Paul Maloy | a97b9d3 | 2015-05-14 10:46:15 -0400 | [diff] [blame] | 1038 | bcl->snd_nxt = 1; |
Ingo Molnar | 34af946 | 2006-06-27 02:53:55 -0700 | [diff] [blame] | 1039 | spin_lock_init(&bclink->node.lock); |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 1040 | __skb_queue_head_init(&bclink->arrvq); |
| 1041 | skb_queue_head_init(&bclink->inputq); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1042 | bcl->owner = &bclink->node; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 1043 | bcl->owner->net = net; |
Jon Paul Maloy | ed193ec | 2015-04-02 09:33:02 -0400 | [diff] [blame] | 1044 | bcl->mtu = MAX_PKT_DEFAULT_MCAST; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 1045 | tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); |
Ying Xue | 7a2f7d1 | 2014-04-21 10:55:46 +0800 | [diff] [blame] | 1046 | bcl->bearer_id = MAX_BEARERS; |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1047 | rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcbearer->bearer); |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1048 | bcl->pmsg = (struct tipc_msg *)&bcl->proto_msg; |
Jon Paul Maloy | 5fd9fd6 | 2015-10-22 08:51:35 -0400 | [diff] [blame^] | 1049 | |
Stephen Hemminger | 4b704d5 | 2009-03-18 19:11:29 -0700 | [diff] [blame] | 1050 | strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 1051 | tn->bcbearer = bcbearer; |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 1052 | tn->bcbase = bclink; |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 1053 | tn->bcl = bcl; |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 1054 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1055 | } |
| 1056 | |
Jon Paul Maloy | 5fd9fd6 | 2015-10-22 08:51:35 -0400 | [diff] [blame^] | 1057 | void tipc_bcast_reinit(struct net *net) |
| 1058 | { |
| 1059 | struct tipc_bc_base *b = tipc_bc_base(net); |
| 1060 | |
| 1061 | msg_set_prevnode(b->link.pmsg, tipc_own_addr(net)); |
| 1062 | } |
| 1063 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 1064 | void tipc_bcast_stop(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1065 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1066 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 1067 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 1068 | tipc_bclink_lock(net); |
| 1069 | tipc_link_purge_queues(tn->bcl); |
| 1070 | tipc_bclink_unlock(net); |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 1071 | RCU_INIT_POINTER(tn->bearer_list[BCBEARER], NULL); |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 1072 | synchronize_net(); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 1073 | kfree(tn->bcbearer); |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 1074 | kfree(tn->bcbase); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1075 | } |
| 1076 | |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 1077 | /** |
| 1078 | * tipc_nmap_add - add a node to a node map |
| 1079 | */ |
Ying Xue | 28dd941 | 2014-04-21 10:55:51 +0800 | [diff] [blame] | 1080 | static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node) |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 1081 | { |
| 1082 | int n = tipc_node(node); |
| 1083 | int w = n / WSIZE; |
| 1084 | u32 mask = (1 << (n % WSIZE)); |
| 1085 | |
| 1086 | if ((nm_ptr->map[w] & mask) == 0) { |
| 1087 | nm_ptr->count++; |
| 1088 | nm_ptr->map[w] |= mask; |
| 1089 | } |
| 1090 | } |
| 1091 | |
| 1092 | /** |
| 1093 | * tipc_nmap_remove - remove a node from a node map |
| 1094 | */ |
Ying Xue | 28dd941 | 2014-04-21 10:55:51 +0800 | [diff] [blame] | 1095 | static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node) |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 1096 | { |
| 1097 | int n = tipc_node(node); |
| 1098 | int w = n / WSIZE; |
| 1099 | u32 mask = (1 << (n % WSIZE)); |
| 1100 | |
| 1101 | if ((nm_ptr->map[w] & mask) != 0) { |
| 1102 | nm_ptr->map[w] &= ~mask; |
| 1103 | nm_ptr->count--; |
| 1104 | } |
| 1105 | } |
| 1106 | |
| 1107 | /** |
| 1108 | * tipc_nmap_diff - find differences between node maps |
| 1109 | * @nm_a: input node map A |
| 1110 | * @nm_b: input node map B |
| 1111 | * @nm_diff: output node map A-B (i.e. nodes of A that are not in B) |
| 1112 | */ |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 1113 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
| 1114 | struct tipc_node_map *nm_b, |
| 1115 | struct tipc_node_map *nm_diff) |
Allan Stephens | 3e22e62 | 2010-05-11 14:30:14 +0000 | [diff] [blame] | 1116 | { |
| 1117 | int stop = ARRAY_SIZE(nm_a->map); |
| 1118 | int w; |
| 1119 | int b; |
| 1120 | u32 map; |
| 1121 | |
| 1122 | memset(nm_diff, 0, sizeof(*nm_diff)); |
| 1123 | for (w = 0; w < stop; w++) { |
| 1124 | map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]); |
| 1125 | nm_diff->map[w] = map; |
| 1126 | if (map != 0) { |
| 1127 | for (b = 0 ; b < WSIZE; b++) { |
| 1128 | if (map & (1 << b)) |
| 1129 | nm_diff->count++; |
| 1130 | } |
| 1131 | } |
| 1132 | } |
| 1133 | } |