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 Maloy | 4c94cc2 | 2017-11-30 16:47:25 +0100 | [diff] [blame] | 4 | * Copyright (c) 2004-2006, 2014-2017, 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" |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 42 | #include "link.h" |
Jon Paul Maloy | 2ae0b8a | 2017-01-18 13:50:51 -0500 | [diff] [blame] | 43 | #include "name_table.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 44 | |
Jon Maloy | 4c94cc2 | 2017-11-30 16:47:25 +0100 | [diff] [blame] | 45 | #define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */ |
| 46 | #define BCLINK_WIN_MIN 32 /* bcast minimum link window size */ |
Allan Stephens | c47e9b9 | 2011-10-24 10:29:26 -0400 | [diff] [blame] | 47 | |
Allan Stephens | 3aec9cc | 2010-05-11 14:30:07 +0000 | [diff] [blame] | 48 | const char tipc_bclink_name[] = "broadcast-link"; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 49 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 50 | /** |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 51 | * struct tipc_bc_base - base structure for keeping broadcast send state |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 52 | * @link: broadcast send link structure |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 53 | * @inputq: data input queue; will only carry SOCK_WAKEUP messages |
Zhenbo Gao | 9cc1bf3 | 2018-09-03 16:36:45 +0800 | [diff] [blame] | 54 | * @dests: array keeping number of reachable destinations per bearer |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 55 | * @primary_bearer: a bearer having links to all broadcast destinations, if any |
Jon Paul Maloy | 9999974 | 2017-01-18 13:50:50 -0500 | [diff] [blame] | 56 | * @bcast_support: indicates if primary bearer, if any, supports broadcast |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 57 | * @force_bcast: forces broadcast for multicast traffic |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 58 | * @rcast_support: indicates if all peer nodes support replicast |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 59 | * @force_rcast: forces replicast for multicast traffic |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 60 | * @rc_ratio: dest count as percentage of cluster size where send method changes |
Zhenbo Gao | 9cc1bf3 | 2018-09-03 16:36:45 +0800 | [diff] [blame] | 61 | * @bc_threshold: calculated from rc_ratio; if dests > threshold use broadcast |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 62 | */ |
| 63 | struct tipc_bc_base { |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 64 | struct tipc_link *link; |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 65 | struct sk_buff_head inputq; |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 66 | int dests[MAX_BEARERS]; |
| 67 | int primary_bearer; |
Jon Paul Maloy | 9999974 | 2017-01-18 13:50:50 -0500 | [diff] [blame] | 68 | bool bcast_support; |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 69 | bool force_bcast; |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 70 | bool rcast_support; |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 71 | bool force_rcast; |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 72 | int rc_ratio; |
| 73 | int bc_threshold; |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 74 | }; |
| 75 | |
Jon Paul Maloy | 5fd9fd6 | 2015-10-22 08:51:35 -0400 | [diff] [blame] | 76 | static struct tipc_bc_base *tipc_bc_base(struct net *net) |
| 77 | { |
| 78 | return tipc_net(net)->bcbase; |
| 79 | } |
| 80 | |
Jon Maloy | 4c94cc2 | 2017-11-30 16:47:25 +0100 | [diff] [blame] | 81 | /* tipc_bcast_get_mtu(): -get the MTU currently used by broadcast link |
| 82 | * Note: the MTU is decremented to give room for a tunnel header, in |
| 83 | * case the message needs to be sent as replicast |
| 84 | */ |
Jon Paul Maloy | 959e178 | 2015-10-22 08:51:43 -0400 | [diff] [blame] | 85 | int tipc_bcast_get_mtu(struct net *net) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 86 | { |
Tuong Lien | fc1b6d6 | 2019-11-08 12:05:11 +0700 | [diff] [blame] | 87 | return tipc_link_mss(tipc_bc_sndlink(net)); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 88 | } |
| 89 | |
Hoang Le | ba5f6a8 | 2019-11-21 10:01:09 +0700 | [diff] [blame] | 90 | void tipc_bcast_toggle_rcast(struct net *net, bool supp) |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 91 | { |
Hoang Le | ba5f6a8 | 2019-11-21 10:01:09 +0700 | [diff] [blame] | 92 | tipc_bc_base(net)->rcast_support = supp; |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | static void tipc_bcbase_calc_bc_threshold(struct net *net) |
| 96 | { |
| 97 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 98 | int cluster_size = tipc_link_bc_peers(tipc_bc_sndlink(net)); |
| 99 | |
| 100 | bb->bc_threshold = 1 + (cluster_size * bb->rc_ratio / 100); |
| 101 | } |
| 102 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 103 | /* tipc_bcbase_select_primary(): find a bearer with links to all destinations, |
| 104 | * if any, and make it primary bearer |
| 105 | */ |
| 106 | static void tipc_bcbase_select_primary(struct net *net) |
| 107 | { |
| 108 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 109 | int all_dests = tipc_link_bc_peers(bb->link); |
Jon Paul Maloy | 9999974 | 2017-01-18 13:50:50 -0500 | [diff] [blame] | 110 | int i, mtu, prim; |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 111 | |
| 112 | bb->primary_bearer = INVALID_BEARER_ID; |
Jon Paul Maloy | 9999974 | 2017-01-18 13:50:50 -0500 | [diff] [blame] | 113 | bb->bcast_support = true; |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 114 | |
| 115 | if (!all_dests) |
| 116 | return; |
| 117 | |
| 118 | for (i = 0; i < MAX_BEARERS; i++) { |
Jon Paul Maloy | 959e178 | 2015-10-22 08:51:43 -0400 | [diff] [blame] | 119 | if (!bb->dests[i]) |
| 120 | continue; |
| 121 | |
| 122 | mtu = tipc_bearer_mtu(net, i); |
| 123 | if (mtu < tipc_link_mtu(bb->link)) |
| 124 | tipc_link_set_mtu(bb->link, mtu); |
Jon Paul Maloy | 9999974 | 2017-01-18 13:50:50 -0500 | [diff] [blame] | 125 | bb->bcast_support &= tipc_bearer_bcast_support(net, i); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 126 | if (bb->dests[i] < all_dests) |
| 127 | continue; |
| 128 | |
| 129 | bb->primary_bearer = i; |
| 130 | |
| 131 | /* Reduce risk that all nodes select same primary */ |
| 132 | if ((i ^ tipc_own_addr(net)) & 1) |
| 133 | break; |
| 134 | } |
Jon Paul Maloy | 9999974 | 2017-01-18 13:50:50 -0500 | [diff] [blame] | 135 | prim = bb->primary_bearer; |
| 136 | if (prim != INVALID_BEARER_ID) |
| 137 | bb->bcast_support = tipc_bearer_bcast_support(net, prim); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id) |
| 141 | { |
| 142 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 143 | |
| 144 | tipc_bcast_lock(net); |
| 145 | bb->dests[bearer_id]++; |
| 146 | tipc_bcbase_select_primary(net); |
| 147 | tipc_bcast_unlock(net); |
| 148 | } |
| 149 | |
| 150 | void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id) |
| 151 | { |
| 152 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 153 | |
| 154 | tipc_bcast_lock(net); |
| 155 | bb->dests[bearer_id]--; |
| 156 | tipc_bcbase_select_primary(net); |
| 157 | tipc_bcast_unlock(net); |
| 158 | } |
| 159 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 160 | /* tipc_bcbase_xmit - broadcast a packet queue across one or more bearers |
| 161 | * |
| 162 | * Note that number of reachable destinations, as indicated in the dests[] |
| 163 | * array, may transitionally differ from the number of destinations indicated |
| 164 | * in each sent buffer. We can sustain this. Excess destination nodes will |
| 165 | * drop and never acknowledge the unexpected packets, and missing destinations |
| 166 | * will either require retransmission (if they are just about to be added to |
| 167 | * the bearer), or be removed from the buffer's 'ackers' counter (if they |
| 168 | * just went down) |
| 169 | */ |
| 170 | static void tipc_bcbase_xmit(struct net *net, struct sk_buff_head *xmitq) |
| 171 | { |
| 172 | int bearer_id; |
| 173 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 174 | struct sk_buff *skb, *_skb; |
| 175 | struct sk_buff_head _xmitq; |
| 176 | |
| 177 | if (skb_queue_empty(xmitq)) |
| 178 | return; |
| 179 | |
| 180 | /* The typical case: at least one bearer has links to all nodes */ |
| 181 | bearer_id = bb->primary_bearer; |
| 182 | if (bearer_id >= 0) { |
| 183 | tipc_bearer_bc_xmit(net, bearer_id, xmitq); |
| 184 | return; |
| 185 | } |
| 186 | |
| 187 | /* We have to transmit across all bearers */ |
Jon Maloy | e654f9f | 2019-08-15 16:42:50 +0200 | [diff] [blame] | 188 | __skb_queue_head_init(&_xmitq); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 189 | for (bearer_id = 0; bearer_id < MAX_BEARERS; bearer_id++) { |
| 190 | if (!bb->dests[bearer_id]) |
| 191 | continue; |
| 192 | |
| 193 | skb_queue_walk(xmitq, skb) { |
| 194 | _skb = pskb_copy_for_clone(skb, GFP_ATOMIC); |
| 195 | if (!_skb) |
| 196 | break; |
| 197 | __skb_queue_tail(&_xmitq, _skb); |
| 198 | } |
| 199 | tipc_bearer_bc_xmit(net, bearer_id, &_xmitq); |
| 200 | } |
| 201 | __skb_queue_purge(xmitq); |
| 202 | __skb_queue_purge(&_xmitq); |
| 203 | } |
| 204 | |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 205 | static void tipc_bcast_select_xmit_method(struct net *net, int dests, |
| 206 | struct tipc_mc_method *method) |
| 207 | { |
| 208 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 209 | unsigned long exp = method->expires; |
| 210 | |
| 211 | /* Broadcast supported by used bearer/bearers? */ |
| 212 | if (!bb->bcast_support) { |
| 213 | method->rcast = true; |
| 214 | return; |
| 215 | } |
| 216 | /* Any destinations which don't support replicast ? */ |
| 217 | if (!bb->rcast_support) { |
| 218 | method->rcast = false; |
| 219 | return; |
| 220 | } |
| 221 | /* Can current method be changed ? */ |
| 222 | method->expires = jiffies + TIPC_METHOD_EXPIRE; |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 223 | if (method->mandatory) |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 224 | return; |
| 225 | |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 226 | if (!(tipc_net(net)->capabilities & TIPC_MCAST_RBCTL) && |
| 227 | time_before(jiffies, exp)) |
| 228 | return; |
| 229 | |
| 230 | /* Configuration as force 'broadcast' method */ |
| 231 | if (bb->force_bcast) { |
| 232 | method->rcast = false; |
| 233 | return; |
| 234 | } |
| 235 | /* Configuration as force 'replicast' method */ |
| 236 | if (bb->force_rcast) { |
| 237 | method->rcast = true; |
| 238 | return; |
| 239 | } |
| 240 | /* Configuration as 'autoselect' or default method */ |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 241 | /* Determine method to use now */ |
| 242 | method->rcast = dests <= bb->bc_threshold; |
| 243 | } |
| 244 | |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 245 | /* tipc_bcast_xmit - broadcast the buffer chain to all external nodes |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 246 | * @net: the applicable net namespace |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 247 | * @pkts: chain of buffers containing message |
| 248 | * @cong_link_cnt: set to 1 if broadcast link is congested, otherwise 0 |
Jon Paul Maloy | 365ad35 | 2017-01-03 10:55:11 -0500 | [diff] [blame] | 249 | * Consumes the buffer chain. |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 250 | * Returns 0 if success, otherwise errno: -EHOSTUNREACH,-EMSGSIZE |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 251 | */ |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 252 | static int tipc_bcast_xmit(struct net *net, struct sk_buff_head *pkts, |
| 253 | u16 *cong_link_cnt) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 254 | { |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 255 | struct tipc_link *l = tipc_bc_sndlink(net); |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 256 | struct sk_buff_head xmitq; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 257 | int rc = 0; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 258 | |
Jon Maloy | e654f9f | 2019-08-15 16:42:50 +0200 | [diff] [blame] | 259 | __skb_queue_head_init(&xmitq); |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 260 | tipc_bcast_lock(net); |
| 261 | if (tipc_link_bc_peers(l)) |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 262 | rc = tipc_link_xmit(l, pkts, &xmitq); |
Jon Paul Maloy | 2f56612 | 2015-10-22 08:51:39 -0400 | [diff] [blame] | 263 | tipc_bcast_unlock(net); |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 264 | tipc_bcbase_xmit(net, &xmitq); |
| 265 | __skb_queue_purge(pkts); |
| 266 | if (rc == -ELINKCONG) { |
| 267 | *cong_link_cnt = 1; |
| 268 | rc = 0; |
| 269 | } |
| 270 | return rc; |
| 271 | } |
Ying Xue | 58dc55f | 2014-11-26 11:41:52 +0800 | [diff] [blame] | 272 | |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 273 | /* tipc_rcast_xmit - replicate and send a message to given destination nodes |
| 274 | * @net: the applicable net namespace |
| 275 | * @pkts: chain of buffers containing message |
| 276 | * @dests: list of destination nodes |
| 277 | * @cong_link_cnt: returns number of congested links |
| 278 | * @cong_links: returns identities of congested links |
| 279 | * Returns 0 if success, otherwise errno |
| 280 | */ |
| 281 | static int tipc_rcast_xmit(struct net *net, struct sk_buff_head *pkts, |
| 282 | struct tipc_nlist *dests, u16 *cong_link_cnt) |
| 283 | { |
Jon Maloy | a80ae53 | 2017-10-13 11:04:22 +0200 | [diff] [blame] | 284 | struct tipc_dest *dst, *tmp; |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 285 | struct sk_buff_head _pkts; |
Jon Maloy | a80ae53 | 2017-10-13 11:04:22 +0200 | [diff] [blame] | 286 | u32 dnode, selector; |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 287 | |
| 288 | selector = msg_link_selector(buf_msg(skb_peek(pkts))); |
Jon Maloy | e654f9f | 2019-08-15 16:42:50 +0200 | [diff] [blame] | 289 | __skb_queue_head_init(&_pkts); |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 290 | |
Jon Maloy | a80ae53 | 2017-10-13 11:04:22 +0200 | [diff] [blame] | 291 | list_for_each_entry_safe(dst, tmp, &dests->list, list) { |
| 292 | dnode = dst->node; |
| 293 | if (!tipc_msg_pskb_copy(dnode, pkts, &_pkts)) |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 294 | return -ENOMEM; |
| 295 | |
| 296 | /* Any other return value than -ELINKCONG is ignored */ |
Jon Maloy | a80ae53 | 2017-10-13 11:04:22 +0200 | [diff] [blame] | 297 | if (tipc_node_xmit(net, &_pkts, dnode, selector) == -ELINKCONG) |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 298 | (*cong_link_cnt)++; |
| 299 | } |
| 300 | return 0; |
| 301 | } |
| 302 | |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 303 | /* tipc_mcast_send_sync - deliver a dummy message with SYN bit |
| 304 | * @net: the applicable net namespace |
| 305 | * @skb: socket buffer to copy |
| 306 | * @method: send method to be used |
| 307 | * @dests: destination nodes for message. |
| 308 | * @cong_link_cnt: returns number of encountered congested destination links |
| 309 | * Returns 0 if success, otherwise errno |
| 310 | */ |
| 311 | static int tipc_mcast_send_sync(struct net *net, struct sk_buff *skb, |
| 312 | struct tipc_mc_method *method, |
| 313 | struct tipc_nlist *dests, |
| 314 | u16 *cong_link_cnt) |
| 315 | { |
| 316 | struct tipc_msg *hdr, *_hdr; |
| 317 | struct sk_buff_head tmpq; |
| 318 | struct sk_buff *_skb; |
| 319 | |
| 320 | /* Is a cluster supporting with new capabilities ? */ |
| 321 | if (!(tipc_net(net)->capabilities & TIPC_MCAST_RBCTL)) |
| 322 | return 0; |
| 323 | |
| 324 | hdr = buf_msg(skb); |
| 325 | if (msg_user(hdr) == MSG_FRAGMENTER) |
Jon Maloy | a7dc51a | 2019-06-25 19:37:00 +0200 | [diff] [blame] | 326 | hdr = msg_inner_hdr(hdr); |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 327 | if (msg_type(hdr) != TIPC_MCAST_MSG) |
| 328 | return 0; |
| 329 | |
| 330 | /* Allocate dummy message */ |
| 331 | _skb = tipc_buf_acquire(MCAST_H_SIZE, GFP_KERNEL); |
Wei Yongjun | 6da88a8 | 2019-03-25 06:31:09 +0000 | [diff] [blame] | 332 | if (!_skb) |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 333 | return -ENOMEM; |
| 334 | |
| 335 | /* Preparing for 'synching' header */ |
| 336 | msg_set_syn(hdr, 1); |
| 337 | |
| 338 | /* Copy skb's header into a dummy header */ |
| 339 | skb_copy_to_linear_data(_skb, hdr, MCAST_H_SIZE); |
| 340 | skb_orphan(_skb); |
| 341 | |
| 342 | /* Reverse method for dummy message */ |
| 343 | _hdr = buf_msg(_skb); |
| 344 | msg_set_size(_hdr, MCAST_H_SIZE); |
| 345 | msg_set_is_rcast(_hdr, !msg_is_rcast(hdr)); |
| 346 | |
Jon Maloy | e654f9f | 2019-08-15 16:42:50 +0200 | [diff] [blame] | 347 | __skb_queue_head_init(&tmpq); |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 348 | __skb_queue_tail(&tmpq, _skb); |
| 349 | if (method->rcast) |
| 350 | tipc_bcast_xmit(net, &tmpq, cong_link_cnt); |
| 351 | else |
| 352 | tipc_rcast_xmit(net, &tmpq, dests, cong_link_cnt); |
| 353 | |
| 354 | /* This queue should normally be empty by now */ |
| 355 | __skb_queue_purge(&tmpq); |
| 356 | |
| 357 | return 0; |
| 358 | } |
| 359 | |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 360 | /* tipc_mcast_xmit - deliver message to indicated destination nodes |
| 361 | * and to identified node local sockets |
| 362 | * @net: the applicable net namespace |
| 363 | * @pkts: chain of buffers containing message |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 364 | * @method: send method to be used |
| 365 | * @dests: destination nodes for message. |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 366 | * @cong_link_cnt: returns number of encountered congested destination links |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 367 | * Consumes buffer chain. |
| 368 | * Returns 0 if success, otherwise errno |
| 369 | */ |
| 370 | int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts, |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 371 | struct tipc_mc_method *method, struct tipc_nlist *dests, |
| 372 | u16 *cong_link_cnt) |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 373 | { |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 374 | struct sk_buff_head inputq, localq; |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 375 | bool rcast = method->rcast; |
| 376 | struct tipc_msg *hdr; |
| 377 | struct sk_buff *skb; |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 378 | int rc = 0; |
| 379 | |
| 380 | skb_queue_head_init(&inputq); |
Jon Maloy | e654f9f | 2019-08-15 16:42:50 +0200 | [diff] [blame] | 381 | __skb_queue_head_init(&localq); |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 382 | |
| 383 | /* Clone packets before they are consumed by next call */ |
| 384 | if (dests->local && !tipc_msg_reassemble(pkts, &localq)) { |
| 385 | rc = -ENOMEM; |
| 386 | goto exit; |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 387 | } |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 388 | /* Send according to determined transmit method */ |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 389 | if (dests->remote) { |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 390 | tipc_bcast_select_xmit_method(net, dests->remote, method); |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 391 | |
| 392 | skb = skb_peek(pkts); |
| 393 | hdr = buf_msg(skb); |
| 394 | if (msg_user(hdr) == MSG_FRAGMENTER) |
Jon Maloy | a7dc51a | 2019-06-25 19:37:00 +0200 | [diff] [blame] | 395 | hdr = msg_inner_hdr(hdr); |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 396 | msg_set_is_rcast(hdr, method->rcast); |
| 397 | |
| 398 | /* Switch method ? */ |
| 399 | if (rcast != method->rcast) |
| 400 | tipc_mcast_send_sync(net, skb, method, |
| 401 | dests, cong_link_cnt); |
| 402 | |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 403 | if (method->rcast) |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 404 | rc = tipc_rcast_xmit(net, pkts, dests, cong_link_cnt); |
| 405 | else |
| 406 | rc = tipc_bcast_xmit(net, pkts, cong_link_cnt); |
| 407 | } |
| 408 | |
John Rutherford | 6c9081a | 2019-08-07 12:52:29 +1000 | [diff] [blame] | 409 | if (dests->local) { |
| 410 | tipc_loopback_trace(net, &localq); |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 411 | tipc_sk_mcast_rcv(net, &localq, &inputq); |
John Rutherford | 6c9081a | 2019-08-07 12:52:29 +1000 | [diff] [blame] | 412 | } |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 413 | exit: |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 414 | /* This queue should normally be empty by now */ |
Jon Paul Maloy | a853e4c | 2017-01-18 13:50:52 -0500 | [diff] [blame] | 415 | __skb_queue_purge(pkts); |
Jon Paul Maloy | 365ad35 | 2017-01-03 10:55:11 -0500 | [diff] [blame] | 416 | return rc; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 417 | } |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 418 | |
| 419 | /* tipc_bcast_rcv - receive a broadcast packet, and deliver to rcv link |
| 420 | * |
| 421 | * RCU is locked, no other locks set |
| 422 | */ |
| 423 | int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb) |
| 424 | { |
| 425 | struct tipc_msg *hdr = buf_msg(skb); |
| 426 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
| 427 | struct sk_buff_head xmitq; |
| 428 | int rc; |
| 429 | |
| 430 | __skb_queue_head_init(&xmitq); |
| 431 | |
| 432 | if (msg_mc_netid(hdr) != tipc_netid(net) || !tipc_link_is_up(l)) { |
| 433 | kfree_skb(skb); |
| 434 | return 0; |
| 435 | } |
| 436 | |
| 437 | tipc_bcast_lock(net); |
| 438 | if (msg_user(hdr) == BCAST_PROTOCOL) |
| 439 | rc = tipc_link_bc_nack_rcv(l, skb, &xmitq); |
| 440 | else |
| 441 | rc = tipc_link_rcv(l, skb, NULL); |
| 442 | tipc_bcast_unlock(net); |
| 443 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 444 | tipc_bcbase_xmit(net, &xmitq); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 445 | |
| 446 | /* Any socket wakeup messages ? */ |
| 447 | if (!skb_queue_empty(inputq)) |
| 448 | tipc_sk_rcv(net, inputq); |
| 449 | |
| 450 | return rc; |
| 451 | } |
| 452 | |
| 453 | /* tipc_bcast_ack_rcv - receive and handle a broadcast acknowledge |
| 454 | * |
| 455 | * RCU is locked, no other locks set |
| 456 | */ |
Jon Paul Maloy | 06bd2b1 | 2016-10-27 18:51:55 -0400 | [diff] [blame] | 457 | void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, |
| 458 | struct tipc_msg *hdr) |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 459 | { |
| 460 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
Jon Paul Maloy | 06bd2b1 | 2016-10-27 18:51:55 -0400 | [diff] [blame] | 461 | u16 acked = msg_bcast_ack(hdr); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 462 | struct sk_buff_head xmitq; |
| 463 | |
Jon Paul Maloy | 06bd2b1 | 2016-10-27 18:51:55 -0400 | [diff] [blame] | 464 | /* Ignore bc acks sent by peer before bcast synch point was received */ |
| 465 | if (msg_bc_ack_invalid(hdr)) |
| 466 | return; |
| 467 | |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 468 | __skb_queue_head_init(&xmitq); |
| 469 | |
| 470 | tipc_bcast_lock(net); |
| 471 | tipc_link_bc_ack_rcv(l, acked, &xmitq); |
| 472 | tipc_bcast_unlock(net); |
| 473 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 474 | tipc_bcbase_xmit(net, &xmitq); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 475 | |
| 476 | /* Any socket wakeup messages ? */ |
| 477 | if (!skb_queue_empty(inputq)) |
| 478 | tipc_sk_rcv(net, inputq); |
| 479 | } |
| 480 | |
| 481 | /* tipc_bcast_synch_rcv - check and update rcv link with peer's send state |
| 482 | * |
| 483 | * RCU is locked, no other locks set |
| 484 | */ |
Jon Paul Maloy | 02d11ca | 2016-09-01 13:52:49 -0400 | [diff] [blame] | 485 | int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l, |
| 486 | struct tipc_msg *hdr) |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 487 | { |
| 488 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
| 489 | struct sk_buff_head xmitq; |
Jon Paul Maloy | 02d11ca | 2016-09-01 13:52:49 -0400 | [diff] [blame] | 490 | int rc = 0; |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 491 | |
| 492 | __skb_queue_head_init(&xmitq); |
| 493 | |
| 494 | tipc_bcast_lock(net); |
Jon Paul Maloy | 06bd2b1 | 2016-10-27 18:51:55 -0400 | [diff] [blame] | 495 | if (msg_type(hdr) != STATE_MSG) { |
| 496 | tipc_link_bc_init_rcv(l, hdr); |
| 497 | } else if (!msg_bc_ack_invalid(hdr)) { |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 498 | tipc_link_bc_ack_rcv(l, msg_bcast_ack(hdr), &xmitq); |
Jon Paul Maloy | 02d11ca | 2016-09-01 13:52:49 -0400 | [diff] [blame] | 499 | rc = tipc_link_bc_sync_rcv(l, hdr, &xmitq); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 500 | } |
| 501 | tipc_bcast_unlock(net); |
| 502 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 503 | tipc_bcbase_xmit(net, &xmitq); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 504 | |
| 505 | /* Any socket wakeup messages ? */ |
| 506 | if (!skb_queue_empty(inputq)) |
| 507 | tipc_sk_rcv(net, inputq); |
Jon Paul Maloy | 02d11ca | 2016-09-01 13:52:49 -0400 | [diff] [blame] | 508 | return rc; |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | /* tipc_bcast_add_peer - add a peer node to broadcast link and bearer |
| 512 | * |
| 513 | * RCU is locked, node lock is set |
| 514 | */ |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 515 | 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] | 516 | struct sk_buff_head *xmitq) |
| 517 | { |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 518 | struct tipc_link *snd_l = tipc_bc_sndlink(net); |
| 519 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 520 | tipc_bcast_lock(net); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 521 | tipc_link_add_bc_peer(snd_l, uc_l, xmitq); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 522 | tipc_bcbase_select_primary(net); |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 523 | tipc_bcbase_calc_bc_threshold(net); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 524 | tipc_bcast_unlock(net); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | /* tipc_bcast_remove_peer - remove a peer node from broadcast link and bearer |
| 528 | * |
| 529 | * RCU is locked, node lock is set |
| 530 | */ |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 531 | 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] | 532 | { |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 533 | struct tipc_link *snd_l = tipc_bc_sndlink(net); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 534 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 535 | struct sk_buff_head xmitq; |
| 536 | |
| 537 | __skb_queue_head_init(&xmitq); |
| 538 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 539 | tipc_bcast_lock(net); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 540 | tipc_link_remove_bc_peer(snd_l, rcv_l, &xmitq); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 541 | tipc_bcbase_select_primary(net); |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 542 | tipc_bcbase_calc_bc_threshold(net); |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 543 | tipc_bcast_unlock(net); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 544 | |
Jon Paul Maloy | b06b281 | 2015-10-22 08:51:42 -0400 | [diff] [blame] | 545 | tipc_bcbase_xmit(net, &xmitq); |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 546 | |
| 547 | /* Any socket wakeup messages ? */ |
| 548 | if (!skb_queue_empty(inputq)) |
| 549 | tipc_sk_rcv(net, inputq); |
| 550 | } |
| 551 | |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 552 | int tipc_bclink_reset_stats(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 553 | { |
Jon Paul Maloy | 38206d5 | 2015-11-19 14:30:46 -0500 | [diff] [blame] | 554 | struct tipc_link *l = tipc_bc_sndlink(net); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 555 | |
Jon Paul Maloy | 38206d5 | 2015-11-19 14:30:46 -0500 | [diff] [blame] | 556 | if (!l) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 557 | return -ENOPROTOOPT; |
| 558 | |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 559 | tipc_bcast_lock(net); |
Jon Paul Maloy | 38206d5 | 2015-11-19 14:30:46 -0500 | [diff] [blame] | 560 | tipc_link_reset_stats(l); |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 561 | tipc_bcast_unlock(net); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 562 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 563 | } |
| 564 | |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 565 | 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] | 566 | { |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 567 | struct tipc_link *l = tipc_bc_sndlink(net); |
Ying Xue | 1da4656 | 2015-01-09 15:27:07 +0800 | [diff] [blame] | 568 | |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 569 | if (!l) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 570 | return -ENOPROTOOPT; |
Jon Paul Maloy | 53387c4 | 2015-10-19 09:21:37 -0400 | [diff] [blame] | 571 | if (limit < BCLINK_WIN_MIN) |
| 572 | limit = BCLINK_WIN_MIN; |
| 573 | if (limit > TIPC_MAX_LINK_WIN) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 574 | return -EINVAL; |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 575 | tipc_bcast_lock(net); |
| 576 | tipc_link_set_queue_limits(l, limit); |
| 577 | tipc_bcast_unlock(net); |
Allan Stephens | 0e35fd5 | 2008-07-14 22:44:01 -0700 | [diff] [blame] | 578 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 579 | } |
| 580 | |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 581 | static int tipc_bc_link_set_broadcast_mode(struct net *net, u32 bc_mode) |
| 582 | { |
| 583 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 584 | |
| 585 | switch (bc_mode) { |
| 586 | case BCLINK_MODE_BCAST: |
| 587 | if (!bb->bcast_support) |
| 588 | return -ENOPROTOOPT; |
| 589 | |
| 590 | bb->force_bcast = true; |
| 591 | bb->force_rcast = false; |
| 592 | break; |
| 593 | case BCLINK_MODE_RCAST: |
| 594 | if (!bb->rcast_support) |
| 595 | return -ENOPROTOOPT; |
| 596 | |
| 597 | bb->force_bcast = false; |
| 598 | bb->force_rcast = true; |
| 599 | break; |
| 600 | case BCLINK_MODE_SEL: |
| 601 | if (!bb->bcast_support || !bb->rcast_support) |
| 602 | return -ENOPROTOOPT; |
| 603 | |
| 604 | bb->force_bcast = false; |
| 605 | bb->force_rcast = false; |
| 606 | break; |
| 607 | default: |
| 608 | return -EINVAL; |
| 609 | } |
| 610 | |
| 611 | return 0; |
| 612 | } |
| 613 | |
| 614 | static int tipc_bc_link_set_broadcast_ratio(struct net *net, u32 bc_ratio) |
| 615 | { |
| 616 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 617 | |
| 618 | if (!bb->bcast_support || !bb->rcast_support) |
| 619 | return -ENOPROTOOPT; |
| 620 | |
| 621 | if (bc_ratio > 100 || bc_ratio <= 0) |
| 622 | return -EINVAL; |
| 623 | |
| 624 | bb->rc_ratio = bc_ratio; |
| 625 | tipc_bcast_lock(net); |
| 626 | tipc_bcbase_calc_bc_threshold(net); |
| 627 | tipc_bcast_unlock(net); |
| 628 | |
| 629 | return 0; |
| 630 | } |
| 631 | |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 632 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]) |
| 633 | { |
| 634 | int err; |
| 635 | u32 win; |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 636 | u32 bc_mode; |
| 637 | u32 bc_ratio; |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 638 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; |
| 639 | |
| 640 | if (!attrs[TIPC_NLA_LINK_PROP]) |
| 641 | return -EINVAL; |
| 642 | |
| 643 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props); |
| 644 | if (err) |
| 645 | return err; |
| 646 | |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 647 | if (!props[TIPC_NLA_PROP_WIN] && |
| 648 | !props[TIPC_NLA_PROP_BROADCAST] && |
| 649 | !props[TIPC_NLA_PROP_BROADCAST_RATIO]) { |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 650 | return -EOPNOTSUPP; |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 651 | } |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 652 | |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 653 | if (props[TIPC_NLA_PROP_BROADCAST]) { |
| 654 | bc_mode = nla_get_u32(props[TIPC_NLA_PROP_BROADCAST]); |
| 655 | err = tipc_bc_link_set_broadcast_mode(net, bc_mode); |
| 656 | } |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 657 | |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 658 | if (!err && props[TIPC_NLA_PROP_BROADCAST_RATIO]) { |
| 659 | bc_ratio = nla_get_u32(props[TIPC_NLA_PROP_BROADCAST_RATIO]); |
| 660 | err = tipc_bc_link_set_broadcast_ratio(net, bc_ratio); |
| 661 | } |
| 662 | |
| 663 | if (!err && props[TIPC_NLA_PROP_WIN]) { |
| 664 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); |
| 665 | err = tipc_bc_link_set_queue_limits(net, win); |
| 666 | } |
| 667 | |
| 668 | return err; |
Richard Alpe | 670f4f8 | 2015-05-06 13:58:55 +0200 | [diff] [blame] | 669 | } |
| 670 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 671 | int tipc_bcast_init(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 672 | { |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 673 | struct tipc_net *tn = tipc_net(net); |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 674 | struct tipc_bc_base *bb = NULL; |
| 675 | struct tipc_link *l = NULL; |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 676 | |
Jia-Ju Bai | a073254 | 2018-07-27 17:31:35 +0800 | [diff] [blame] | 677 | bb = kzalloc(sizeof(*bb), GFP_KERNEL); |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 678 | if (!bb) |
| 679 | goto enomem; |
| 680 | tn->bcbase = bb; |
Jon Paul Maloy | 0043550 | 2015-10-22 08:51:34 -0400 | [diff] [blame] | 681 | spin_lock_init(&tipc_net(net)->bclock); |
Jon Paul Maloy | 5fd9fd6 | 2015-10-22 08:51:35 -0400 | [diff] [blame] | 682 | |
Jon Paul Maloy | c72fa87 | 2015-10-22 08:51:46 -0400 | [diff] [blame] | 683 | if (!tipc_link_bc_create(net, 0, 0, |
Jon Maloy | 4c94cc2 | 2017-11-30 16:47:25 +0100 | [diff] [blame] | 684 | FB_MTU, |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 685 | BCLINK_WIN_DEFAULT, |
Jon Paul Maloy | fd556f2 | 2015-10-22 08:51:40 -0400 | [diff] [blame] | 686 | 0, |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 687 | &bb->inputq, |
Jon Paul Maloy | 2af5ae3 | 2015-10-22 08:51:48 -0400 | [diff] [blame] | 688 | NULL, |
Jon Paul Maloy | 5266698 | 2015-10-22 08:51:41 -0400 | [diff] [blame] | 689 | NULL, |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 690 | &l)) |
| 691 | goto enomem; |
| 692 | bb->link = l; |
| 693 | tn->bcl = l; |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 694 | bb->rc_ratio = 10; |
Jon Paul Maloy | 01fd12b | 2017-01-18 13:50:53 -0500 | [diff] [blame] | 695 | bb->rcast_support = true; |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 696 | return 0; |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 697 | enomem: |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 698 | kfree(bb); |
| 699 | kfree(l); |
| 700 | return -ENOMEM; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 701 | } |
| 702 | |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 703 | void tipc_bcast_stop(struct net *net) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 704 | { |
Ying Xue | 7f9f95d | 2015-01-09 15:27:06 +0800 | [diff] [blame] | 705 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 706 | |
Ying Xue | eb8b00f | 2014-05-05 08:56:16 +0800 | [diff] [blame] | 707 | synchronize_net(); |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 708 | kfree(tn->bcbase); |
Jon Paul Maloy | 3230190 | 2015-10-22 08:51:37 -0400 | [diff] [blame] | 709 | kfree(tn->bcl); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 710 | } |
Jon Paul Maloy | 2ae0b8a | 2017-01-18 13:50:51 -0500 | [diff] [blame] | 711 | |
| 712 | void tipc_nlist_init(struct tipc_nlist *nl, u32 self) |
| 713 | { |
| 714 | memset(nl, 0, sizeof(*nl)); |
| 715 | INIT_LIST_HEAD(&nl->list); |
| 716 | nl->self = self; |
| 717 | } |
| 718 | |
| 719 | void tipc_nlist_add(struct tipc_nlist *nl, u32 node) |
| 720 | { |
| 721 | if (node == nl->self) |
| 722 | nl->local = true; |
Jon Maloy | a80ae53 | 2017-10-13 11:04:22 +0200 | [diff] [blame] | 723 | else if (tipc_dest_push(&nl->list, node, 0)) |
Jon Paul Maloy | 2ae0b8a | 2017-01-18 13:50:51 -0500 | [diff] [blame] | 724 | nl->remote++; |
| 725 | } |
| 726 | |
| 727 | void tipc_nlist_del(struct tipc_nlist *nl, u32 node) |
| 728 | { |
| 729 | if (node == nl->self) |
| 730 | nl->local = false; |
Jon Maloy | a80ae53 | 2017-10-13 11:04:22 +0200 | [diff] [blame] | 731 | else if (tipc_dest_del(&nl->list, node, 0)) |
Jon Paul Maloy | 2ae0b8a | 2017-01-18 13:50:51 -0500 | [diff] [blame] | 732 | nl->remote--; |
| 733 | } |
| 734 | |
| 735 | void tipc_nlist_purge(struct tipc_nlist *nl) |
| 736 | { |
Jon Maloy | a80ae53 | 2017-10-13 11:04:22 +0200 | [diff] [blame] | 737 | tipc_dest_list_purge(&nl->list); |
Jon Paul Maloy | 2ae0b8a | 2017-01-18 13:50:51 -0500 | [diff] [blame] | 738 | nl->remote = 0; |
Gustavo A. R. Silva | c9efb15 | 2018-03-05 15:56:14 -0600 | [diff] [blame] | 739 | nl->local = false; |
Jon Paul Maloy | 2ae0b8a | 2017-01-18 13:50:51 -0500 | [diff] [blame] | 740 | } |
Hoang Le | 02ec6ca | 2019-03-19 18:49:48 +0700 | [diff] [blame] | 741 | |
| 742 | u32 tipc_bcast_get_broadcast_mode(struct net *net) |
| 743 | { |
| 744 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 745 | |
| 746 | if (bb->force_bcast) |
| 747 | return BCLINK_MODE_BCAST; |
| 748 | |
| 749 | if (bb->force_rcast) |
| 750 | return BCLINK_MODE_RCAST; |
| 751 | |
| 752 | if (bb->bcast_support && bb->rcast_support) |
| 753 | return BCLINK_MODE_SEL; |
| 754 | |
| 755 | return 0; |
| 756 | } |
| 757 | |
| 758 | u32 tipc_bcast_get_broadcast_ratio(struct net *net) |
| 759 | { |
| 760 | struct tipc_bc_base *bb = tipc_bc_base(net); |
| 761 | |
| 762 | return bb->rc_ratio; |
| 763 | } |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 764 | |
Hoang Le | 08e046c | 2019-03-21 17:25:18 +0700 | [diff] [blame] | 765 | void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq, |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 766 | struct sk_buff_head *inputq) |
| 767 | { |
| 768 | struct sk_buff *skb, *_skb, *tmp; |
| 769 | struct tipc_msg *hdr, *_hdr; |
| 770 | bool match = false; |
| 771 | u32 node, port; |
| 772 | |
| 773 | skb = skb_peek(inputq); |
Hoang Le | e1279ff | 2019-04-03 13:05:04 +0700 | [diff] [blame] | 774 | if (!skb) |
| 775 | return; |
| 776 | |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 777 | hdr = buf_msg(skb); |
| 778 | |
| 779 | if (likely(!msg_is_syn(hdr) && skb_queue_empty(defq))) |
| 780 | return; |
| 781 | |
| 782 | node = msg_orignode(hdr); |
Hoang Le | 08e046c | 2019-03-21 17:25:18 +0700 | [diff] [blame] | 783 | if (node == tipc_own_addr(net)) |
| 784 | return; |
| 785 | |
Hoang Le | c55c8ed | 2019-03-19 18:49:50 +0700 | [diff] [blame] | 786 | port = msg_origport(hdr); |
| 787 | |
| 788 | /* Has the twin SYN message already arrived ? */ |
| 789 | skb_queue_walk(defq, _skb) { |
| 790 | _hdr = buf_msg(_skb); |
| 791 | if (msg_orignode(_hdr) != node) |
| 792 | continue; |
| 793 | if (msg_origport(_hdr) != port) |
| 794 | continue; |
| 795 | match = true; |
| 796 | break; |
| 797 | } |
| 798 | |
| 799 | if (!match) { |
| 800 | if (!msg_is_syn(hdr)) |
| 801 | return; |
| 802 | __skb_dequeue(inputq); |
| 803 | __skb_queue_tail(defq, skb); |
| 804 | return; |
| 805 | } |
| 806 | |
| 807 | /* Deliver non-SYN message from other link, otherwise queue it */ |
| 808 | if (!msg_is_syn(hdr)) { |
| 809 | if (msg_is_rcast(hdr) != msg_is_rcast(_hdr)) |
| 810 | return; |
| 811 | __skb_dequeue(inputq); |
| 812 | __skb_queue_tail(defq, skb); |
| 813 | return; |
| 814 | } |
| 815 | |
| 816 | /* Queue non-SYN/SYN message from same link */ |
| 817 | if (msg_is_rcast(hdr) == msg_is_rcast(_hdr)) { |
| 818 | __skb_dequeue(inputq); |
| 819 | __skb_queue_tail(defq, skb); |
| 820 | return; |
| 821 | } |
| 822 | |
| 823 | /* Matching SYN messages => return the one with data, if any */ |
| 824 | __skb_unlink(_skb, defq); |
| 825 | if (msg_data_sz(hdr)) { |
| 826 | kfree_skb(_skb); |
| 827 | } else { |
| 828 | __skb_dequeue(inputq); |
| 829 | kfree_skb(skb); |
| 830 | __skb_queue_tail(inputq, _skb); |
| 831 | } |
| 832 | |
| 833 | /* Deliver subsequent non-SYN messages from same peer */ |
| 834 | skb_queue_walk_safe(defq, _skb, tmp) { |
| 835 | _hdr = buf_msg(_skb); |
| 836 | if (msg_orignode(_hdr) != node) |
| 837 | continue; |
| 838 | if (msg_origport(_hdr) != port) |
| 839 | continue; |
| 840 | if (msg_is_syn(_hdr)) |
| 841 | break; |
| 842 | __skb_unlink(_skb, defq); |
| 843 | __skb_queue_tail(inputq, _skb); |
| 844 | } |
| 845 | } |