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 | |
Jon Paul Maloy | 53387c4 | 2015-10-19 09:21:37 -0400 | [diff] [blame] | 46 | #define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */ |
| 47 | #define BCLINK_WIN_MIN 32 /* bcast minimum link window size */ |
Allan Stephens | c47e9b9 | 2011-10-24 10:29:26 -0400 | [diff] [blame] | 48 | |
Allan Stephens | 3aec9cc | 2010-05-11 14:30:07 +0000 | [diff] [blame] | 49 | const char tipc_bclink_name[] = "broadcast-link"; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 50 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 51 | /** |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 52 | * struct tipc_bc_base - base structure for keeping broadcast send state |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 53 | * @link: broadcast send link structure |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 54 | * @inputq: data input queue; will only carry SOCK_WAKEUP messages |
| 55 | * @dest: array keeping number of reachable destinations per bearer |
| 56 | * @primary_bearer: a bearer having links to all broadcast destinations, if any |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 57 | */ |
| 58 | struct tipc_bc_base { |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 59 | struct tipc_link *link; |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 60 | struct sk_buff_head inputq; |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 61 | int dests[MAX_BEARERS]; |
| 62 | int primary_bearer; |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 63 | }; |
| 64 | |
Jon Paul Maloy | 5fd9fd6 | 2015-10-22 08:51:35 -0400 | [diff] [blame] | 65 | static struct tipc_bc_base *tipc_bc_base(struct net *net) |
| 66 | { |
| 67 | return tipc_net(net)->bcbase; |
| 68 | } |
| 69 | |
Jon Paul Maloy | 959e178 | 2015-10-22 08:51:43 -0400 | [diff] [blame] | 70 | int tipc_bcast_get_mtu(struct net *net) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 71 | { |
Jon Paul Maloy | 959e178 | 2015-10-22 08:51:43 -0400 | [diff] [blame] | 72 | return tipc_link_mtu(tipc_bc_sndlink(net)); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 73 | } |
| 74 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 75 | /* tipc_bcbase_select_primary(): find a bearer with links to all destinations, |
| 76 | * if any, and make it primary bearer |
| 77 | */ |
| 78 | static void tipc_bcbase_select_primary(struct net *net) |
| 79 | { |
| 80 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 81 | int all_dests = tipc_link_bc_peers(bb->link); |
Jon Paul Maloy | 959e178 | 2015-10-22 08:51:43 -0400 | [diff] [blame] | 82 | int i, mtu; |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 83 | |
| 84 | bb->primary_bearer = INVALID_BEARER_ID; |
| 85 | |
| 86 | if (!all_dests) |
| 87 | return; |
| 88 | |
| 89 | for (i = 0; i < MAX_BEARERS; i++) { |
Jon Paul Maloy | 959e178 | 2015-10-22 08:51:43 -0400 | [diff] [blame] | 90 | if (!bb->dests[i]) |
| 91 | continue; |
| 92 | |
| 93 | mtu = tipc_bearer_mtu(net, i); |
| 94 | if (mtu < tipc_link_mtu(bb->link)) |
| 95 | tipc_link_set_mtu(bb->link, mtu); |
| 96 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 97 | if (bb->dests[i] < all_dests) |
| 98 | continue; |
| 99 | |
| 100 | bb->primary_bearer = i; |
| 101 | |
| 102 | /* Reduce risk that all nodes select same primary */ |
| 103 | if ((i ^ tipc_own_addr(net)) & 1) |
| 104 | break; |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id) |
| 109 | { |
| 110 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 111 | |
| 112 | tipc_bcast_lock(net); |
| 113 | bb->dests[bearer_id]++; |
| 114 | tipc_bcbase_select_primary(net); |
| 115 | tipc_bcast_unlock(net); |
| 116 | } |
| 117 | |
| 118 | void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id) |
| 119 | { |
| 120 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 121 | |
| 122 | tipc_bcast_lock(net); |
| 123 | bb->dests[bearer_id]--; |
| 124 | tipc_bcbase_select_primary(net); |
| 125 | tipc_bcast_unlock(net); |
| 126 | } |
| 127 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 128 | /* tipc_bcbase_xmit - broadcast a packet queue across one or more bearers |
| 129 | * |
| 130 | * Note that number of reachable destinations, as indicated in the dests[] |
| 131 | * array, may transitionally differ from the number of destinations indicated |
| 132 | * in each sent buffer. We can sustain this. Excess destination nodes will |
| 133 | * drop and never acknowledge the unexpected packets, and missing destinations |
| 134 | * will either require retransmission (if they are just about to be added to |
| 135 | * the bearer), or be removed from the buffer's 'ackers' counter (if they |
| 136 | * just went down) |
| 137 | */ |
| 138 | static void tipc_bcbase_xmit(struct net *net, struct sk_buff_head *xmitq) |
| 139 | { |
| 140 | int bearer_id; |
| 141 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 142 | struct sk_buff *skb, *_skb; |
| 143 | struct sk_buff_head _xmitq; |
| 144 | |
| 145 | if (skb_queue_empty(xmitq)) |
| 146 | return; |
| 147 | |
| 148 | /* The typical case: at least one bearer has links to all nodes */ |
| 149 | bearer_id = bb->primary_bearer; |
| 150 | if (bearer_id >= 0) { |
| 151 | tipc_bearer_bc_xmit(net, bearer_id, xmitq); |
| 152 | return; |
| 153 | } |
| 154 | |
| 155 | /* We have to transmit across all bearers */ |
| 156 | skb_queue_head_init(&_xmitq); |
| 157 | for (bearer_id = 0; bearer_id < MAX_BEARERS; bearer_id++) { |
| 158 | if (!bb->dests[bearer_id]) |
| 159 | continue; |
| 160 | |
| 161 | skb_queue_walk(xmitq, skb) { |
| 162 | _skb = pskb_copy_for_clone(skb, GFP_ATOMIC); |
| 163 | if (!_skb) |
| 164 | break; |
| 165 | __skb_queue_tail(&_xmitq, _skb); |
| 166 | } |
| 167 | tipc_bearer_bc_xmit(net, bearer_id, &_xmitq); |
| 168 | } |
| 169 | __skb_queue_purge(xmitq); |
| 170 | __skb_queue_purge(&_xmitq); |
| 171 | } |
| 172 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 173 | /* tipc_bcast_xmit - deliver buffer chain to all nodes in cluster |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 174 | * and to identified node local sockets |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 175 | * @net: the applicable net namespace |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 176 | * @list: chain of buffers containing message |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 177 | * Consumes the buffer chain, except when returning -ELINKCONG |
| 178 | * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE |
| 179 | */ |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 180 | 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] | 181 | { |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 182 | struct tipc_link *l = tipc_bc_sndlink(net); |
| 183 | struct sk_buff_head xmitq, inputq, rcvq; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 184 | int rc = 0; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 185 | |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 186 | __skb_queue_head_init(&rcvq); |
| 187 | __skb_queue_head_init(&xmitq); |
| 188 | skb_queue_head_init(&inputq); |
| 189 | |
| 190 | /* Prepare message clone for local node */ |
| 191 | if (unlikely(!tipc_msg_reassemble(list, &rcvq))) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 192 | return -EHOSTUNREACH; |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 193 | |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 194 | tipc_bcast_lock(net); |
| 195 | if (tipc_link_bc_peers(l)) |
| 196 | rc = tipc_link_xmit(l, list, &xmitq); |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 197 | tipc_bcast_unlock(net); |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 198 | |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 199 | /* Don't send to local node if adding to link failed */ |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 200 | if (unlikely(rc)) { |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 201 | __skb_queue_purge(&rcvq); |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 202 | return rc; |
| 203 | } |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 204 | |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 205 | /* Broadcast to all nodes, inluding local node */ |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 206 | tipc_bcbase_xmit(net, &xmitq); |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 207 | tipc_sk_mcast_rcv(net, &rcvq, &inputq); |
| 208 | __skb_queue_purge(list); |
| 209 | return 0; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 210 | } |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 211 | |
| 212 | /* tipc_bcast_rcv - receive a broadcast packet, and deliver to rcv link |
| 213 | * |
| 214 | * RCU is locked, no other locks set |
| 215 | */ |
| 216 | int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb) |
| 217 | { |
| 218 | struct tipc_msg *hdr = buf_msg(skb); |
| 219 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
| 220 | struct sk_buff_head xmitq; |
| 221 | int rc; |
| 222 | |
| 223 | __skb_queue_head_init(&xmitq); |
| 224 | |
| 225 | if (msg_mc_netid(hdr) != tipc_netid(net) || !tipc_link_is_up(l)) { |
| 226 | kfree_skb(skb); |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | tipc_bcast_lock(net); |
| 231 | if (msg_user(hdr) == BCAST_PROTOCOL) |
| 232 | rc = tipc_link_bc_nack_rcv(l, skb, &xmitq); |
| 233 | else |
| 234 | rc = tipc_link_rcv(l, skb, NULL); |
| 235 | tipc_bcast_unlock(net); |
| 236 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 237 | tipc_bcbase_xmit(net, &xmitq); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 238 | |
| 239 | /* Any socket wakeup messages ? */ |
| 240 | if (!skb_queue_empty(inputq)) |
| 241 | tipc_sk_rcv(net, inputq); |
| 242 | |
| 243 | return rc; |
| 244 | } |
| 245 | |
| 246 | /* tipc_bcast_ack_rcv - receive and handle a broadcast acknowledge |
| 247 | * |
| 248 | * RCU is locked, no other locks set |
| 249 | */ |
| 250 | void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, u32 acked) |
| 251 | { |
| 252 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
| 253 | struct sk_buff_head xmitq; |
| 254 | |
| 255 | __skb_queue_head_init(&xmitq); |
| 256 | |
| 257 | tipc_bcast_lock(net); |
| 258 | tipc_link_bc_ack_rcv(l, acked, &xmitq); |
| 259 | tipc_bcast_unlock(net); |
| 260 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 261 | tipc_bcbase_xmit(net, &xmitq); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 262 | |
| 263 | /* Any socket wakeup messages ? */ |
| 264 | if (!skb_queue_empty(inputq)) |
| 265 | tipc_sk_rcv(net, inputq); |
| 266 | } |
| 267 | |
| 268 | /* tipc_bcast_synch_rcv - check and update rcv link with peer's send state |
| 269 | * |
| 270 | * RCU is locked, no other locks set |
| 271 | */ |
| 272 | void tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l, |
| 273 | struct tipc_msg *hdr) |
| 274 | { |
| 275 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
| 276 | struct sk_buff_head xmitq; |
| 277 | |
| 278 | __skb_queue_head_init(&xmitq); |
| 279 | |
| 280 | tipc_bcast_lock(net); |
| 281 | if (msg_type(hdr) == STATE_MSG) { |
| 282 | tipc_link_bc_ack_rcv(l, msg_bcast_ack(hdr), &xmitq); |
| 283 | tipc_link_bc_sync_rcv(l, hdr, &xmitq); |
| 284 | } else { |
| 285 | tipc_link_bc_init_rcv(l, hdr); |
| 286 | } |
| 287 | tipc_bcast_unlock(net); |
| 288 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 289 | tipc_bcbase_xmit(net, &xmitq); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 290 | |
| 291 | /* Any socket wakeup messages ? */ |
| 292 | if (!skb_queue_empty(inputq)) |
| 293 | tipc_sk_rcv(net, inputq); |
| 294 | } |
| 295 | |
| 296 | /* tipc_bcast_add_peer - add a peer node to broadcast link and bearer |
| 297 | * |
| 298 | * RCU is locked, node lock is set |
| 299 | */ |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 300 | void tipc_bcast_add_peer(struct net *net, struct tipc_link *uc_l, |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 301 | struct sk_buff_head *xmitq) |
| 302 | { |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 303 | struct tipc_link *snd_l = tipc_bc_sndlink(net); |
| 304 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 305 | tipc_bcast_lock(net); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 306 | tipc_link_add_bc_peer(snd_l, uc_l, xmitq); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 307 | tipc_bcbase_select_primary(net); |
| 308 | tipc_bcast_unlock(net); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | /* tipc_bcast_remove_peer - remove a peer node from broadcast link and bearer |
| 312 | * |
| 313 | * RCU is locked, node lock is set |
| 314 | */ |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 315 | void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_l) |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 316 | { |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 317 | struct tipc_link *snd_l = tipc_bc_sndlink(net); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 318 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 319 | struct sk_buff_head xmitq; |
| 320 | |
| 321 | __skb_queue_head_init(&xmitq); |
| 322 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 323 | tipc_bcast_lock(net); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 324 | tipc_link_remove_bc_peer(snd_l, rcv_l, &xmitq); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 325 | tipc_bcbase_select_primary(net); |
| 326 | tipc_bcast_unlock(net); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 327 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 328 | tipc_bcbase_xmit(net, &xmitq); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 329 | |
| 330 | /* Any socket wakeup messages ? */ |
| 331 | if (!skb_queue_empty(inputq)) |
| 332 | tipc_sk_rcv(net, inputq); |
| 333 | } |
| 334 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 335 | int tipc_bclink_reset_stats(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 336 | { |
Jon Paul Maloy | 38206d5 | 2015-11-19 14:30:46 -0500 | [diff] [blame] | 337 | struct tipc_link *l = tipc_bc_sndlink(net); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 338 | |
Jon Paul Maloy | 38206d5 | 2015-11-19 14:30:46 -0500 | [diff] [blame] | 339 | if (!l) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 340 | return -ENOPROTOOPT; |
| 341 | |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 342 | tipc_bcast_lock(net); |
Jon Paul Maloy | 38206d5 | 2015-11-19 14:30:46 -0500 | [diff] [blame] | 343 | tipc_link_reset_stats(l); |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 344 | tipc_bcast_unlock(net); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 345 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 346 | } |
| 347 | |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 348 | static int tipc_bc_link_set_queue_limits(struct net *net, u32 limit) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 349 | { |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 350 | struct tipc_link *l = tipc_bc_sndlink(net); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 351 | |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 352 | if (!l) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 353 | return -ENOPROTOOPT; |
Jon Paul Maloy | 53387c4 | 2015-10-19 09:21:37 -0400 | [diff] [blame] | 354 | if (limit < BCLINK_WIN_MIN) |
| 355 | limit = BCLINK_WIN_MIN; |
| 356 | if (limit > TIPC_MAX_LINK_WIN) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 357 | return -EINVAL; |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 358 | tipc_bcast_lock(net); |
| 359 | tipc_link_set_queue_limits(l, limit); |
| 360 | tipc_bcast_unlock(net); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 361 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 362 | } |
| 363 | |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 364 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]) |
| 365 | { |
| 366 | int err; |
| 367 | u32 win; |
| 368 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; |
| 369 | |
| 370 | if (!attrs[TIPC_NLA_LINK_PROP]) |
| 371 | return -EINVAL; |
| 372 | |
| 373 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props); |
| 374 | if (err) |
| 375 | return err; |
| 376 | |
| 377 | if (!props[TIPC_NLA_PROP_WIN]) |
| 378 | return -EOPNOTSUPP; |
| 379 | |
| 380 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
| 381 | |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 382 | return tipc_bc_link_set_queue_limits(net, win); |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 383 | } |
| 384 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 385 | int tipc_bcast_init(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 386 | { |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 387 | struct tipc_net *tn = tipc_net(net); |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 388 | struct tipc_bc_base *bb = NULL; |
| 389 | struct tipc_link *l = NULL; |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 390 | |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 391 | bb = kzalloc(sizeof(*bb), GFP_ATOMIC); |
| 392 | if (!bb) |
| 393 | goto enomem; |
| 394 | tn->bcbase = bb; |
Jon Paul Maloy | 0043550 | 2015-10-22 08:51:34 -0400 | [diff] [blame] | 395 | spin_lock_init(&tipc_net(net)->bclock); |
Jon Paul Maloy | 5fd9fd6 | 2015-10-22 08:51:35 -0400 | [diff] [blame] | 396 | |
Jon Paul Maloy | c72fa87 | 2015-10-22 08:51:46 -0400 | [diff] [blame] | 397 | if (!tipc_link_bc_create(net, 0, 0, |
Jon Paul Maloy | 959e178 | 2015-10-22 08:51:43 -0400 | [diff] [blame] | 398 | U16_MAX, |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 399 | BCLINK_WIN_DEFAULT, |
Jon Paul Maloy | fd556f2 | 2015-10-22 08:51:40 -0400 | [diff] [blame] | 400 | 0, |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 401 | &bb->inputq, |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 402 | NULL, |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 403 | NULL, |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 404 | &l)) |
| 405 | goto enomem; |
| 406 | bb->link = l; |
| 407 | tn->bcl = l; |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 408 | return 0; |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 409 | enomem: |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 410 | kfree(bb); |
| 411 | kfree(l); |
| 412 | return -ENOMEM; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 413 | } |
| 414 | |
Jon Paul Maloy | 5fd9fd6 | 2015-10-22 08:51:35 -0400 | [diff] [blame] | 415 | void tipc_bcast_reinit(struct net *net) |
| 416 | { |
Jon Paul Maloy | 38206d5 | 2015-11-19 14:30:46 -0500 | [diff] [blame] | 417 | tipc_link_reinit(tipc_bc_sndlink(net), tipc_own_addr(net)); |
Jon Paul Maloy | 5fd9fd6 | 2015-10-22 08:51:35 -0400 | [diff] [blame] | 418 | } |
| 419 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 420 | void tipc_bcast_stop(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 421 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 422 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 423 | |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 424 | synchronize_net(); |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 425 | kfree(tn->bcbase); |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 426 | kfree(tn->bcl); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 427 | } |