Commit | Line | Data |
---|---|---|
b97bf3fd PL |
1 | /* |
2 | * net/tipc/bcast.c: TIPC broadcast code | |
c4307285 | 3 | * |
3c724acd | 4 | * Copyright (c) 2004-2006, 2014-2015, Ericsson AB |
b97bf3fd | 5 | * Copyright (c) 2004, Intel Corporation. |
2d627b92 | 6 | * Copyright (c) 2005, 2010-2011, Wind River Systems |
b97bf3fd PL |
7 | * All rights reserved. |
8 | * | |
9ea1fd3c | 9 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
10 | * modification, are permitted provided that the following conditions are met: |
11 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 20 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ | |
37 | ||
078bec82 JPM |
38 | #include "socket.h" |
39 | #include "msg.h" | |
b97bf3fd | 40 | #include "bcast.h" |
9f6bdcd4 | 41 | #include "name_distr.h" |
1da46568 | 42 | #include "core.h" |
b97bf3fd | 43 | |
987b58be YX |
44 | #define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */ |
45 | #define BCLINK_WIN_DEFAULT 20 /* bcast link window size (default) */ | |
b97bf3fd | 46 | |
3aec9cc9 | 47 | const char tipc_bclink_name[] = "broadcast-link"; |
b97bf3fd | 48 | |
31e3c3f6 | 49 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
50 | struct tipc_node_map *nm_b, | |
51 | struct tipc_node_map *nm_diff); | |
28dd9418 YX |
52 | static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node); |
53 | static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node); | |
b97bf3fd | 54 | |
1da46568 | 55 | static void tipc_bclink_lock(struct net *net) |
d69afc90 | 56 | { |
1da46568 YX |
57 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
58 | ||
59 | spin_lock_bh(&tn->bclink->lock); | |
d69afc90 YX |
60 | } |
61 | ||
1da46568 | 62 | static void tipc_bclink_unlock(struct net *net) |
d69afc90 | 63 | { |
1da46568 | 64 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3f5a12bd | 65 | |
1da46568 | 66 | spin_unlock_bh(&tn->bclink->lock); |
3f5a12bd YX |
67 | } |
68 | ||
cb1b7280 JPM |
69 | void tipc_bclink_input(struct net *net) |
70 | { | |
71 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
72 | ||
73 | tipc_sk_mcast_rcv(net, &tn->bclink->arrvq, &tn->bclink->inputq); | |
74 | } | |
75 | ||
078bec82 JPM |
76 | uint tipc_bclink_get_mtu(void) |
77 | { | |
78 | return MAX_PKT_DEFAULT_MCAST; | |
79 | } | |
80 | ||
05790c64 | 81 | static u32 bcbuf_acks(struct sk_buff *buf) |
b97bf3fd | 82 | { |
880b005f | 83 | return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle; |
b97bf3fd PL |
84 | } |
85 | ||
05790c64 | 86 | static void bcbuf_set_acks(struct sk_buff *buf, u32 acks) |
b97bf3fd | 87 | { |
880b005f | 88 | TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks; |
b97bf3fd PL |
89 | } |
90 | ||
05790c64 | 91 | static void bcbuf_decr_acks(struct sk_buff *buf) |
b97bf3fd PL |
92 | { |
93 | bcbuf_set_acks(buf, bcbuf_acks(buf) - 1); | |
94 | } | |
95 | ||
1da46568 | 96 | void tipc_bclink_add_node(struct net *net, u32 addr) |
cd3decdf | 97 | { |
1da46568 YX |
98 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
99 | ||
100 | tipc_bclink_lock(net); | |
101 | tipc_nmap_add(&tn->bclink->bcast_nodes, addr); | |
102 | tipc_bclink_unlock(net); | |
cd3decdf AS |
103 | } |
104 | ||
1da46568 | 105 | void tipc_bclink_remove_node(struct net *net, u32 addr) |
cd3decdf | 106 | { |
1da46568 YX |
107 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
108 | ||
109 | tipc_bclink_lock(net); | |
110 | tipc_nmap_remove(&tn->bclink->bcast_nodes, addr); | |
7d967b67 JPM |
111 | |
112 | /* Last node? => reset backlog queue */ | |
113 | if (!tn->bclink->bcast_nodes.count) | |
114 | tipc_link_purge_backlog(&tn->bclink->link); | |
115 | ||
1da46568 | 116 | tipc_bclink_unlock(net); |
cd3decdf | 117 | } |
b97bf3fd | 118 | |
1da46568 | 119 | static void bclink_set_last_sent(struct net *net) |
5b1f7bde | 120 | { |
1da46568 YX |
121 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
122 | struct tipc_link *bcl = tn->bcl; | |
123 | ||
dd3f9e70 | 124 | bcl->silent_intv_cnt = mod(bcl->snd_nxt - 1); |
5b1f7bde AS |
125 | } |
126 | ||
1da46568 | 127 | u32 tipc_bclink_get_last_sent(struct net *net) |
5b1f7bde | 128 | { |
1da46568 YX |
129 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
130 | ||
a97b9d3f | 131 | return tn->bcl->silent_intv_cnt; |
5b1f7bde AS |
132 | } |
133 | ||
7a54d4a9 | 134 | static void bclink_update_last_sent(struct tipc_node *node, u32 seqno) |
b97bf3fd | 135 | { |
7a54d4a9 AS |
136 | node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ? |
137 | seqno : node->bclink.last_sent; | |
b97bf3fd PL |
138 | } |
139 | ||
2c53040f | 140 | /** |
01d83edd AS |
141 | * tipc_bclink_retransmit_to - get most recent node to request retransmission |
142 | * | |
d69afc90 | 143 | * Called with bclink_lock locked |
01d83edd | 144 | */ |
1da46568 | 145 | struct tipc_node *tipc_bclink_retransmit_to(struct net *net) |
01d83edd | 146 | { |
1da46568 YX |
147 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
148 | ||
149 | return tn->bclink->retransmit_to; | |
01d83edd AS |
150 | } |
151 | ||
c4307285 | 152 | /** |
b97bf3fd PL |
153 | * bclink_retransmit_pkt - retransmit broadcast packets |
154 | * @after: sequence number of last packet to *not* retransmit | |
155 | * @to: sequence number of last packet to retransmit | |
c4307285 | 156 | * |
d69afc90 | 157 | * Called with bclink_lock locked |
b97bf3fd | 158 | */ |
1da46568 | 159 | static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to) |
b97bf3fd | 160 | { |
58dc55f2 | 161 | struct sk_buff *skb; |
1da46568 | 162 | struct tipc_link *bcl = tn->bcl; |
b97bf3fd | 163 | |
05dcc5aa | 164 | skb_queue_walk(&bcl->transmq, skb) { |
703068ee JM |
165 | if (more(buf_seqno(skb), after)) { |
166 | tipc_link_retransmit(bcl, skb, mod(to - after)); | |
58dc55f2 | 167 | break; |
703068ee | 168 | } |
58dc55f2 | 169 | } |
b97bf3fd PL |
170 | } |
171 | ||
908344cd JM |
172 | /** |
173 | * tipc_bclink_wakeup_users - wake up pending users | |
174 | * | |
175 | * Called with no locks taken | |
176 | */ | |
f2f9800d | 177 | void tipc_bclink_wakeup_users(struct net *net) |
908344cd | 178 | { |
1da46568 | 179 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
4988bb4a | 180 | |
c637c103 | 181 | tipc_sk_rcv(net, &tn->bclink->link.wakeupq); |
908344cd JM |
182 | } |
183 | ||
c4307285 | 184 | /** |
4323add6 | 185 | * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets |
b97bf3fd PL |
186 | * @n_ptr: node that sent acknowledgement info |
187 | * @acked: broadcast sequence # that has been acknowledged | |
c4307285 | 188 | * |
d69afc90 | 189 | * Node is locked, bclink_lock unlocked. |
b97bf3fd | 190 | */ |
6c00055a | 191 | void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked) |
b97bf3fd | 192 | { |
58dc55f2 | 193 | struct sk_buff *skb, *tmp; |
b97bf3fd | 194 | unsigned int released = 0; |
1da46568 YX |
195 | struct net *net = n_ptr->net; |
196 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
b97bf3fd | 197 | |
2cdf3918 JPM |
198 | if (unlikely(!n_ptr->bclink.recv_permitted)) |
199 | return; | |
200 | ||
1da46568 | 201 | tipc_bclink_lock(net); |
2cdf3918 | 202 | |
36559591 | 203 | /* Bail out if tx queue is empty (no clean up is required) */ |
05dcc5aa | 204 | skb = skb_peek(&tn->bcl->transmq); |
58dc55f2 | 205 | if (!skb) |
36559591 AS |
206 | goto exit; |
207 | ||
208 | /* Determine which messages need to be acknowledged */ | |
209 | if (acked == INVALID_LINK_SEQ) { | |
210 | /* | |
211 | * Contact with specified node has been lost, so need to | |
212 | * acknowledge sent messages only (if other nodes still exist) | |
213 | * or both sent and unsent messages (otherwise) | |
214 | */ | |
1da46568 | 215 | if (tn->bclink->bcast_nodes.count) |
a97b9d3f | 216 | acked = tn->bcl->silent_intv_cnt; |
36559591 | 217 | else |
a97b9d3f | 218 | acked = tn->bcl->snd_nxt; |
36559591 AS |
219 | } else { |
220 | /* | |
221 | * Bail out if specified sequence number does not correspond | |
222 | * to a message that has been sent and not yet acknowledged | |
223 | */ | |
58dc55f2 | 224 | if (less(acked, buf_seqno(skb)) || |
a97b9d3f | 225 | less(tn->bcl->silent_intv_cnt, acked) || |
36559591 AS |
226 | less_eq(acked, n_ptr->bclink.acked)) |
227 | goto exit; | |
228 | } | |
229 | ||
230 | /* Skip over packets that node has previously acknowledged */ | |
05dcc5aa | 231 | skb_queue_walk(&tn->bcl->transmq, skb) { |
58dc55f2 YX |
232 | if (more(buf_seqno(skb), n_ptr->bclink.acked)) |
233 | break; | |
234 | } | |
b97bf3fd PL |
235 | |
236 | /* Update packets that node is now acknowledging */ | |
05dcc5aa | 237 | skb_queue_walk_from_safe(&tn->bcl->transmq, skb, tmp) { |
58dc55f2 YX |
238 | if (more(buf_seqno(skb), acked)) |
239 | break; | |
05dcc5aa JPM |
240 | bcbuf_decr_acks(skb); |
241 | bclink_set_last_sent(net); | |
58dc55f2 | 242 | if (bcbuf_acks(skb) == 0) { |
05dcc5aa | 243 | __skb_unlink(skb, &tn->bcl->transmq); |
58dc55f2 | 244 | kfree_skb(skb); |
b97bf3fd PL |
245 | released = 1; |
246 | } | |
b97bf3fd PL |
247 | } |
248 | n_ptr->bclink.acked = acked; | |
249 | ||
250 | /* Try resolving broadcast link congestion, if necessary */ | |
05dcc5aa | 251 | if (unlikely(skb_peek(&tn->bcl->backlogq))) { |
1da46568 YX |
252 | tipc_link_push_packets(tn->bcl); |
253 | bclink_set_last_sent(net); | |
5b1f7bde | 254 | } |
c637c103 | 255 | if (unlikely(released && !skb_queue_empty(&tn->bcl->wakeupq))) |
908344cd | 256 | n_ptr->action_flags |= TIPC_WAKEUP_BCAST_USERS; |
36559591 | 257 | exit: |
1da46568 | 258 | tipc_bclink_unlock(net); |
b97bf3fd PL |
259 | } |
260 | ||
2c53040f | 261 | /** |
7a54d4a9 | 262 | * tipc_bclink_update_link_state - update broadcast link state |
c4307285 | 263 | * |
7216cd94 | 264 | * RCU and node lock set |
b97bf3fd | 265 | */ |
c5898636 | 266 | void tipc_bclink_update_link_state(struct tipc_node *n_ptr, |
c93d3baa | 267 | u32 last_sent) |
b97bf3fd | 268 | { |
7a54d4a9 | 269 | struct sk_buff *buf; |
c5898636 | 270 | struct net *net = n_ptr->net; |
c93d3baa | 271 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
b97bf3fd | 272 | |
7a54d4a9 | 273 | /* Ignore "stale" link state info */ |
7a54d4a9 AS |
274 | if (less_eq(last_sent, n_ptr->bclink.last_in)) |
275 | return; | |
b97bf3fd | 276 | |
7a54d4a9 | 277 | /* Update link synchronization state; quit if in sync */ |
7a54d4a9 AS |
278 | bclink_update_last_sent(n_ptr, last_sent); |
279 | ||
280 | if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in) | |
281 | return; | |
282 | ||
283 | /* Update out-of-sync state; quit if loss is still unconfirmed */ | |
7a54d4a9 AS |
284 | if ((++n_ptr->bclink.oos_state) == 1) { |
285 | if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2)) | |
286 | return; | |
287 | n_ptr->bclink.oos_state++; | |
288 | } | |
289 | ||
290 | /* Don't NACK if one has been recently sent (or seen) */ | |
7a54d4a9 | 291 | if (n_ptr->bclink.oos_state & 0x1) |
b97bf3fd PL |
292 | return; |
293 | ||
7a54d4a9 | 294 | /* Send NACK */ |
31e3c3f6 | 295 | buf = tipc_buf_acquire(INT_H_SIZE); |
b97bf3fd | 296 | if (buf) { |
7a54d4a9 | 297 | struct tipc_msg *msg = buf_msg(buf); |
05dcc5aa | 298 | struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferdq); |
bc6fecd4 | 299 | u32 to = skb ? buf_seqno(skb) - 1 : n_ptr->bclink.last_sent; |
7a54d4a9 | 300 | |
c5898636 | 301 | tipc_msg_init(tn->own_addr, msg, BCAST_PROTOCOL, STATE_MSG, |
7a54d4a9 | 302 | INT_H_SIZE, n_ptr->addr); |
bf781ecf | 303 | msg_set_non_seq(msg, 1); |
c93d3baa | 304 | msg_set_mc_netid(msg, tn->net_id); |
7a54d4a9 AS |
305 | msg_set_bcast_ack(msg, n_ptr->bclink.last_in); |
306 | msg_set_bcgap_after(msg, n_ptr->bclink.last_in); | |
bc6fecd4 | 307 | msg_set_bcgap_to(msg, to); |
b97bf3fd | 308 | |
1da46568 | 309 | tipc_bclink_lock(net); |
7f9f95d9 | 310 | tipc_bearer_send(net, MAX_BEARERS, buf, NULL); |
1da46568 YX |
311 | tn->bcl->stats.sent_nacks++; |
312 | tipc_bclink_unlock(net); | |
5f6d9123 | 313 | kfree_skb(buf); |
b97bf3fd | 314 | |
7a54d4a9 | 315 | n_ptr->bclink.oos_state++; |
b97bf3fd PL |
316 | } |
317 | } | |
318 | ||
2c53040f | 319 | /** |
7a54d4a9 | 320 | * bclink_peek_nack - monitor retransmission requests sent by other nodes |
b97bf3fd | 321 | * |
7a54d4a9 AS |
322 | * Delay any upcoming NACK by this node if another node has already |
323 | * requested the first message this node is going to ask for. | |
b97bf3fd | 324 | */ |
f2f9800d | 325 | static void bclink_peek_nack(struct net *net, struct tipc_msg *msg) |
b97bf3fd | 326 | { |
f2f9800d | 327 | struct tipc_node *n_ptr = tipc_node_find(net, msg_destnode(msg)); |
b97bf3fd | 328 | |
7a54d4a9 | 329 | if (unlikely(!n_ptr)) |
b97bf3fd | 330 | return; |
7a54d4a9 | 331 | |
4323add6 | 332 | tipc_node_lock(n_ptr); |
389dd9bc | 333 | if (n_ptr->bclink.recv_permitted && |
7a54d4a9 AS |
334 | (n_ptr->bclink.last_in != n_ptr->bclink.last_sent) && |
335 | (n_ptr->bclink.last_in == msg_bcgap_after(msg))) | |
336 | n_ptr->bclink.oos_state = 2; | |
4323add6 | 337 | tipc_node_unlock(n_ptr); |
8a0f6ebe | 338 | tipc_node_put(n_ptr); |
b97bf3fd PL |
339 | } |
340 | ||
cb1b7280 | 341 | /* tipc_bclink_xmit - deliver buffer chain to all nodes in cluster |
9fbfb8b1 | 342 | * and to identified node local sockets |
f2f9800d | 343 | * @net: the applicable net namespace |
a6ca1094 | 344 | * @list: chain of buffers containing message |
078bec82 JPM |
345 | * Consumes the buffer chain, except when returning -ELINKCONG |
346 | * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE | |
347 | */ | |
f2f9800d | 348 | int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list) |
078bec82 | 349 | { |
1da46568 YX |
350 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
351 | struct tipc_link *bcl = tn->bcl; | |
352 | struct tipc_bclink *bclink = tn->bclink; | |
078bec82 JPM |
353 | int rc = 0; |
354 | int bc = 0; | |
a6ca1094 | 355 | struct sk_buff *skb; |
cb1b7280 JPM |
356 | struct sk_buff_head arrvq; |
357 | struct sk_buff_head inputq; | |
078bec82 JPM |
358 | |
359 | /* Prepare clone of message for local node */ | |
a6ca1094 YX |
360 | skb = tipc_msg_reassemble(list); |
361 | if (unlikely(!skb)) { | |
362 | __skb_queue_purge(list); | |
078bec82 JPM |
363 | return -EHOSTUNREACH; |
364 | } | |
cb1b7280 | 365 | /* Broadcast to all nodes */ |
078bec82 | 366 | if (likely(bclink)) { |
1da46568 | 367 | tipc_bclink_lock(net); |
078bec82 | 368 | if (likely(bclink->bcast_nodes.count)) { |
7f9f95d9 | 369 | rc = __tipc_link_xmit(net, bcl, list); |
078bec82 | 370 | if (likely(!rc)) { |
05dcc5aa | 371 | u32 len = skb_queue_len(&bcl->transmq); |
58dc55f2 | 372 | |
1da46568 | 373 | bclink_set_last_sent(net); |
078bec82 | 374 | bcl->stats.queue_sz_counts++; |
58dc55f2 | 375 | bcl->stats.accu_queue_sz += len; |
078bec82 JPM |
376 | } |
377 | bc = 1; | |
378 | } | |
1da46568 | 379 | tipc_bclink_unlock(net); |
078bec82 JPM |
380 | } |
381 | ||
382 | if (unlikely(!bc)) | |
a6ca1094 | 383 | __skb_queue_purge(list); |
078bec82 | 384 | |
cb1b7280 | 385 | if (unlikely(rc)) { |
a6ca1094 | 386 | kfree_skb(skb); |
cb1b7280 JPM |
387 | return rc; |
388 | } | |
389 | /* Deliver message clone */ | |
390 | __skb_queue_head_init(&arrvq); | |
391 | skb_queue_head_init(&inputq); | |
392 | __skb_queue_tail(&arrvq, skb); | |
393 | tipc_sk_mcast_rcv(net, &arrvq, &inputq); | |
078bec82 JPM |
394 | return rc; |
395 | } | |
396 | ||
2c53040f | 397 | /** |
63e7f1ac AS |
398 | * bclink_accept_pkt - accept an incoming, in-sequence broadcast packet |
399 | * | |
d69afc90 | 400 | * Called with both sending node's lock and bclink_lock taken. |
63e7f1ac | 401 | */ |
63e7f1ac AS |
402 | static void bclink_accept_pkt(struct tipc_node *node, u32 seqno) |
403 | { | |
1da46568 YX |
404 | struct tipc_net *tn = net_generic(node->net, tipc_net_id); |
405 | ||
63e7f1ac AS |
406 | bclink_update_last_sent(node, seqno); |
407 | node->bclink.last_in = seqno; | |
408 | node->bclink.oos_state = 0; | |
1da46568 | 409 | tn->bcl->stats.recv_info++; |
63e7f1ac AS |
410 | |
411 | /* | |
412 | * Unicast an ACK periodically, ensuring that | |
413 | * all nodes in the cluster don't ACK at the same time | |
414 | */ | |
34747539 | 415 | if (((seqno - tn->own_addr) % TIPC_MIN_LINK_WIN) == 0) { |
247f0f3c | 416 | tipc_link_proto_xmit(node->active_links[node->addr & 1], |
ed193ece | 417 | STATE_MSG, 0, 0, 0, 0); |
1da46568 | 418 | tn->bcl->stats.sent_acks++; |
63e7f1ac AS |
419 | } |
420 | } | |
421 | ||
2c53040f | 422 | /** |
247f0f3c | 423 | * tipc_bclink_rcv - receive a broadcast packet, and deliver upwards |
c4307285 | 424 | * |
7216cd94 | 425 | * RCU is locked, no other locks set |
b97bf3fd | 426 | */ |
c93d3baa | 427 | void tipc_bclink_rcv(struct net *net, struct sk_buff *buf) |
d356eeba | 428 | { |
c93d3baa | 429 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 | 430 | struct tipc_link *bcl = tn->bcl; |
b97bf3fd | 431 | struct tipc_msg *msg = buf_msg(buf); |
5d3c488d | 432 | struct tipc_node *node; |
b97bf3fd PL |
433 | u32 next_in; |
434 | u32 seqno; | |
0abd8ff2 | 435 | int deferred = 0; |
c637c103 JPM |
436 | int pos = 0; |
437 | struct sk_buff *iskb; | |
cb1b7280 | 438 | struct sk_buff_head *arrvq, *inputq; |
b97bf3fd | 439 | |
5d3c488d | 440 | /* Screen out unwanted broadcast messages */ |
c93d3baa | 441 | if (msg_mc_netid(msg) != tn->net_id) |
5d3c488d AS |
442 | goto exit; |
443 | ||
f2f9800d | 444 | node = tipc_node_find(net, msg_prevnode(msg)); |
5d3c488d AS |
445 | if (unlikely(!node)) |
446 | goto exit; | |
447 | ||
448 | tipc_node_lock(node); | |
389dd9bc | 449 | if (unlikely(!node->bclink.recv_permitted)) |
5d3c488d | 450 | goto unlock; |
b97bf3fd | 451 | |
8a275a6a | 452 | /* Handle broadcast protocol message */ |
b97bf3fd | 453 | if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) { |
9f6bdcd4 AS |
454 | if (msg_type(msg) != STATE_MSG) |
455 | goto unlock; | |
34747539 | 456 | if (msg_destnode(msg) == tn->own_addr) { |
4323add6 | 457 | tipc_bclink_acknowledge(node, msg_bcast_ack(msg)); |
1da46568 | 458 | tipc_bclink_lock(net); |
b97bf3fd | 459 | bcl->stats.recv_nacks++; |
1da46568 YX |
460 | tn->bclink->retransmit_to = node; |
461 | bclink_retransmit_pkt(tn, msg_bcgap_after(msg), | |
b97bf3fd | 462 | msg_bcgap_to(msg)); |
1da46568 | 463 | tipc_bclink_unlock(net); |
b952b2be | 464 | tipc_node_unlock(node); |
b97bf3fd | 465 | } else { |
5d3c488d | 466 | tipc_node_unlock(node); |
f2f9800d | 467 | bclink_peek_nack(net, msg); |
b97bf3fd | 468 | } |
8a0f6ebe | 469 | tipc_node_put(node); |
5d3c488d | 470 | goto exit; |
b97bf3fd PL |
471 | } |
472 | ||
5d3c488d | 473 | /* Handle in-sequence broadcast message */ |
b97bf3fd | 474 | seqno = msg_seqno(msg); |
8a275a6a | 475 | next_in = mod(node->bclink.last_in + 1); |
cb1b7280 JPM |
476 | arrvq = &tn->bclink->arrvq; |
477 | inputq = &tn->bclink->inputq; | |
b97bf3fd PL |
478 | |
479 | if (likely(seqno == next_in)) { | |
8a275a6a | 480 | receive: |
7a54d4a9 | 481 | /* Deliver message to destination */ |
b97bf3fd | 482 | if (likely(msg_isdata(msg))) { |
1da46568 | 483 | tipc_bclink_lock(net); |
63e7f1ac | 484 | bclink_accept_pkt(node, seqno); |
cb1b7280 JPM |
485 | spin_lock_bh(&inputq->lock); |
486 | __skb_queue_tail(arrvq, buf); | |
487 | spin_unlock_bh(&inputq->lock); | |
488 | node->action_flags |= TIPC_BCAST_MSG_EVT; | |
1da46568 | 489 | tipc_bclink_unlock(net); |
4323add6 | 490 | tipc_node_unlock(node); |
b97bf3fd | 491 | } else if (msg_user(msg) == MSG_BUNDLER) { |
1da46568 | 492 | tipc_bclink_lock(net); |
63e7f1ac | 493 | bclink_accept_pkt(node, seqno); |
b97bf3fd PL |
494 | bcl->stats.recv_bundles++; |
495 | bcl->stats.recv_bundled += msg_msgcnt(msg); | |
cb1b7280 JPM |
496 | pos = 0; |
497 | while (tipc_msg_extract(buf, &iskb, &pos)) { | |
498 | spin_lock_bh(&inputq->lock); | |
499 | __skb_queue_tail(arrvq, iskb); | |
500 | spin_unlock_bh(&inputq->lock); | |
501 | } | |
502 | node->action_flags |= TIPC_BCAST_MSG_EVT; | |
1da46568 | 503 | tipc_bclink_unlock(net); |
4323add6 | 504 | tipc_node_unlock(node); |
b97bf3fd | 505 | } else if (msg_user(msg) == MSG_FRAGMENTER) { |
1da46568 | 506 | tipc_bclink_lock(net); |
63e7f1ac | 507 | bclink_accept_pkt(node, seqno); |
bc14b8d6 YX |
508 | tipc_buf_append(&node->bclink.reasm_buf, &buf); |
509 | if (unlikely(!buf && !node->bclink.reasm_buf)) { | |
510 | tipc_bclink_unlock(net); | |
511 | goto unlock; | |
512 | } | |
b97bf3fd | 513 | bcl->stats.recv_fragments++; |
37e22164 | 514 | if (buf) { |
b97bf3fd | 515 | bcl->stats.recv_fragmented++; |
40ba3cdf | 516 | msg = buf_msg(buf); |
1da46568 | 517 | tipc_bclink_unlock(net); |
528f6f4b EH |
518 | goto receive; |
519 | } | |
1da46568 | 520 | tipc_bclink_unlock(net); |
4323add6 | 521 | tipc_node_unlock(node); |
b97bf3fd | 522 | } else { |
1da46568 | 523 | tipc_bclink_lock(net); |
63e7f1ac | 524 | bclink_accept_pkt(node, seqno); |
1da46568 | 525 | tipc_bclink_unlock(net); |
4323add6 | 526 | tipc_node_unlock(node); |
5f6d9123 | 527 | kfree_skb(buf); |
b97bf3fd | 528 | } |
5d3c488d | 529 | buf = NULL; |
8a275a6a AS |
530 | |
531 | /* Determine new synchronization state */ | |
5d3c488d | 532 | tipc_node_lock(node); |
8a275a6a AS |
533 | if (unlikely(!tipc_node_is_up(node))) |
534 | goto unlock; | |
535 | ||
7a54d4a9 | 536 | if (node->bclink.last_in == node->bclink.last_sent) |
8a275a6a AS |
537 | goto unlock; |
538 | ||
05dcc5aa | 539 | if (skb_queue_empty(&node->bclink.deferdq)) { |
7a54d4a9 AS |
540 | node->bclink.oos_state = 1; |
541 | goto unlock; | |
542 | } | |
543 | ||
05dcc5aa | 544 | msg = buf_msg(skb_peek(&node->bclink.deferdq)); |
8a275a6a AS |
545 | seqno = msg_seqno(msg); |
546 | next_in = mod(next_in + 1); | |
547 | if (seqno != next_in) | |
548 | goto unlock; | |
549 | ||
550 | /* Take in-sequence message from deferred queue & deliver it */ | |
05dcc5aa | 551 | buf = __skb_dequeue(&node->bclink.deferdq); |
8a275a6a AS |
552 | goto receive; |
553 | } | |
554 | ||
555 | /* Handle out-of-sequence broadcast message */ | |
8a275a6a | 556 | if (less(next_in, seqno)) { |
05dcc5aa | 557 | deferred = tipc_link_defer_pkt(&node->bclink.deferdq, |
8a275a6a | 558 | buf); |
7a54d4a9 | 559 | bclink_update_last_sent(node, seqno); |
5d3c488d | 560 | buf = NULL; |
0abd8ff2 | 561 | } |
8a275a6a | 562 | |
1da46568 | 563 | tipc_bclink_lock(net); |
b98158e3 | 564 | |
8a275a6a AS |
565 | if (deferred) |
566 | bcl->stats.deferred_recv++; | |
0232c5a5 AS |
567 | else |
568 | bcl->stats.duplicates++; | |
8a275a6a | 569 | |
1da46568 | 570 | tipc_bclink_unlock(net); |
b98158e3 | 571 | |
5d3c488d | 572 | unlock: |
4323add6 | 573 | tipc_node_unlock(node); |
8a0f6ebe | 574 | tipc_node_put(node); |
5d3c488d | 575 | exit: |
5f6d9123 | 576 | kfree_skb(buf); |
b97bf3fd PL |
577 | } |
578 | ||
6c00055a | 579 | u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr) |
b97bf3fd | 580 | { |
389dd9bc | 581 | return (n_ptr->bclink.recv_permitted && |
1da46568 | 582 | (tipc_bclink_get_last_sent(n_ptr->net) != n_ptr->bclink.acked)); |
b97bf3fd PL |
583 | } |
584 | ||
585 | ||
586 | /** | |
4323add6 | 587 | * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer |
c4307285 | 588 | * |
2ff9f924 AS |
589 | * Send packet over as many bearers as necessary to reach all nodes |
590 | * that have joined the broadcast link. | |
c4307285 | 591 | * |
2ff9f924 AS |
592 | * Returns 0 (packet sent successfully) under all circumstances, |
593 | * since the broadcast link's pseudo-bearer never blocks | |
b97bf3fd | 594 | */ |
1da46568 YX |
595 | static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf, |
596 | struct tipc_bearer *unused1, | |
988f088a | 597 | struct tipc_media_addr *unused2) |
b97bf3fd | 598 | { |
b97bf3fd | 599 | int bp_index; |
6f92ee54 | 600 | struct tipc_msg *msg = buf_msg(buf); |
c93d3baa | 601 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 YX |
602 | struct tipc_bcbearer *bcbearer = tn->bcbearer; |
603 | struct tipc_bclink *bclink = tn->bclink; | |
b97bf3fd | 604 | |
e6160710 | 605 | /* Prepare broadcast link message for reliable transmission, |
2ff9f924 AS |
606 | * if first time trying to send it; |
607 | * preparation is skipped for broadcast link protocol messages | |
608 | * since they are sent in an unreliable manner and don't need it | |
609 | */ | |
b97bf3fd | 610 | if (likely(!msg_non_seq(buf_msg(buf)))) { |
cd3decdf | 611 | bcbuf_set_acks(buf, bclink->bcast_nodes.count); |
40aecb1b | 612 | msg_set_non_seq(msg, 1); |
c93d3baa | 613 | msg_set_mc_netid(msg, tn->net_id); |
1da46568 | 614 | tn->bcl->stats.sent_info++; |
cd3decdf | 615 | if (WARN_ON(!bclink->bcast_nodes.count)) { |
5e726900 AS |
616 | dump_stack(); |
617 | return 0; | |
618 | } | |
b97bf3fd PL |
619 | } |
620 | ||
b97bf3fd | 621 | /* Send buffer over bearers until all targets reached */ |
cd3decdf | 622 | bcbearer->remains = bclink->bcast_nodes; |
b97bf3fd PL |
623 | |
624 | for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) { | |
2d627b92 AS |
625 | struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary; |
626 | struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary; | |
6f92ee54 JPM |
627 | struct tipc_bearer *bp[2] = {p, s}; |
628 | struct tipc_bearer *b = bp[msg_link_selector(msg)]; | |
488fc9af | 629 | struct sk_buff *tbuf; |
b97bf3fd PL |
630 | |
631 | if (!p) | |
e6160710 | 632 | break; /* No more bearers to try */ |
6f92ee54 JPM |
633 | if (!b) |
634 | b = p; | |
77861d9c | 635 | tipc_nmap_diff(&bcbearer->remains, &b->nodes, |
e6160710 | 636 | &bcbearer->remains_new); |
65f51ef0 | 637 | if (bcbearer->remains_new.count == bcbearer->remains.count) |
e6160710 | 638 | continue; /* Nothing added by bearer pair */ |
b97bf3fd | 639 | |
488fc9af GF |
640 | if (bp_index == 0) { |
641 | /* Use original buffer for first bearer */ | |
7f9f95d9 | 642 | tipc_bearer_send(net, b->identity, buf, &b->bcast_addr); |
488fc9af GF |
643 | } else { |
644 | /* Avoid concurrent buffer access */ | |
bad93e9d | 645 | tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC); |
488fc9af GF |
646 | if (!tbuf) |
647 | break; | |
7f9f95d9 YX |
648 | tipc_bearer_send(net, b->identity, tbuf, |
649 | &b->bcast_addr); | |
488fc9af GF |
650 | kfree_skb(tbuf); /* Bearer keeps a clone */ |
651 | } | |
65f51ef0 | 652 | if (bcbearer->remains_new.count == 0) |
e6160710 | 653 | break; /* All targets reached */ |
b97bf3fd | 654 | |
65f51ef0 | 655 | bcbearer->remains = bcbearer->remains_new; |
b97bf3fd | 656 | } |
c4307285 | 657 | |
2ff9f924 | 658 | return 0; |
b97bf3fd PL |
659 | } |
660 | ||
661 | /** | |
4323add6 | 662 | * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer |
b97bf3fd | 663 | */ |
7f9f95d9 YX |
664 | void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr, |
665 | u32 node, bool action) | |
b97bf3fd | 666 | { |
7f9f95d9 | 667 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 | 668 | struct tipc_bcbearer *bcbearer = tn->bcbearer; |
7f9ab6ac PG |
669 | struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp; |
670 | struct tipc_bcbearer_pair *bp_curr; | |
f8322dfc | 671 | struct tipc_bearer *b; |
b97bf3fd PL |
672 | int b_index; |
673 | int pri; | |
674 | ||
1da46568 | 675 | tipc_bclink_lock(net); |
b97bf3fd | 676 | |
28dd9418 YX |
677 | if (action) |
678 | tipc_nmap_add(nm_ptr, node); | |
679 | else | |
680 | tipc_nmap_remove(nm_ptr, node); | |
681 | ||
b97bf3fd | 682 | /* Group bearers by priority (can assume max of two per priority) */ |
b97bf3fd PL |
683 | memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp)); |
684 | ||
f8322dfc | 685 | rcu_read_lock(); |
b97bf3fd | 686 | for (b_index = 0; b_index < MAX_BEARERS; b_index++) { |
7f9f95d9 | 687 | b = rcu_dereference_rtnl(tn->bearer_list[b_index]); |
f47de12b | 688 | if (!b || !b->nodes.count) |
b97bf3fd PL |
689 | continue; |
690 | ||
691 | if (!bp_temp[b->priority].primary) | |
692 | bp_temp[b->priority].primary = b; | |
693 | else | |
694 | bp_temp[b->priority].secondary = b; | |
695 | } | |
f8322dfc | 696 | rcu_read_unlock(); |
b97bf3fd PL |
697 | |
698 | /* Create array of bearer pairs for broadcasting */ | |
b97bf3fd PL |
699 | bp_curr = bcbearer->bpairs; |
700 | memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs)); | |
701 | ||
16cb4b33 | 702 | for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) { |
b97bf3fd PL |
703 | |
704 | if (!bp_temp[pri].primary) | |
705 | continue; | |
706 | ||
707 | bp_curr->primary = bp_temp[pri].primary; | |
708 | ||
709 | if (bp_temp[pri].secondary) { | |
4323add6 PL |
710 | if (tipc_nmap_equal(&bp_temp[pri].primary->nodes, |
711 | &bp_temp[pri].secondary->nodes)) { | |
b97bf3fd PL |
712 | bp_curr->secondary = bp_temp[pri].secondary; |
713 | } else { | |
714 | bp_curr++; | |
715 | bp_curr->primary = bp_temp[pri].secondary; | |
716 | } | |
717 | } | |
718 | ||
719 | bp_curr++; | |
720 | } | |
721 | ||
1da46568 | 722 | tipc_bclink_unlock(net); |
b97bf3fd PL |
723 | } |
724 | ||
d8182804 RA |
725 | static int __tipc_nl_add_bc_link_stat(struct sk_buff *skb, |
726 | struct tipc_stats *stats) | |
7be57fc6 RA |
727 | { |
728 | int i; | |
729 | struct nlattr *nest; | |
730 | ||
731 | struct nla_map { | |
732 | __u32 key; | |
733 | __u32 val; | |
734 | }; | |
735 | ||
736 | struct nla_map map[] = { | |
737 | {TIPC_NLA_STATS_RX_INFO, stats->recv_info}, | |
738 | {TIPC_NLA_STATS_RX_FRAGMENTS, stats->recv_fragments}, | |
739 | {TIPC_NLA_STATS_RX_FRAGMENTED, stats->recv_fragmented}, | |
740 | {TIPC_NLA_STATS_RX_BUNDLES, stats->recv_bundles}, | |
741 | {TIPC_NLA_STATS_RX_BUNDLED, stats->recv_bundled}, | |
742 | {TIPC_NLA_STATS_TX_INFO, stats->sent_info}, | |
743 | {TIPC_NLA_STATS_TX_FRAGMENTS, stats->sent_fragments}, | |
744 | {TIPC_NLA_STATS_TX_FRAGMENTED, stats->sent_fragmented}, | |
745 | {TIPC_NLA_STATS_TX_BUNDLES, stats->sent_bundles}, | |
746 | {TIPC_NLA_STATS_TX_BUNDLED, stats->sent_bundled}, | |
747 | {TIPC_NLA_STATS_RX_NACKS, stats->recv_nacks}, | |
748 | {TIPC_NLA_STATS_RX_DEFERRED, stats->deferred_recv}, | |
749 | {TIPC_NLA_STATS_TX_NACKS, stats->sent_nacks}, | |
750 | {TIPC_NLA_STATS_TX_ACKS, stats->sent_acks}, | |
751 | {TIPC_NLA_STATS_RETRANSMITTED, stats->retransmitted}, | |
752 | {TIPC_NLA_STATS_DUPLICATES, stats->duplicates}, | |
753 | {TIPC_NLA_STATS_LINK_CONGS, stats->link_congs}, | |
754 | {TIPC_NLA_STATS_MAX_QUEUE, stats->max_queue_sz}, | |
755 | {TIPC_NLA_STATS_AVG_QUEUE, stats->queue_sz_counts ? | |
756 | (stats->accu_queue_sz / stats->queue_sz_counts) : 0} | |
757 | }; | |
758 | ||
759 | nest = nla_nest_start(skb, TIPC_NLA_LINK_STATS); | |
760 | if (!nest) | |
761 | return -EMSGSIZE; | |
762 | ||
763 | for (i = 0; i < ARRAY_SIZE(map); i++) | |
764 | if (nla_put_u32(skb, map[i].key, map[i].val)) | |
765 | goto msg_full; | |
766 | ||
767 | nla_nest_end(skb, nest); | |
768 | ||
769 | return 0; | |
770 | msg_full: | |
771 | nla_nest_cancel(skb, nest); | |
772 | ||
773 | return -EMSGSIZE; | |
774 | } | |
775 | ||
1da46568 | 776 | int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg) |
7be57fc6 RA |
777 | { |
778 | int err; | |
779 | void *hdr; | |
780 | struct nlattr *attrs; | |
781 | struct nlattr *prop; | |
1da46568 YX |
782 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
783 | struct tipc_link *bcl = tn->bcl; | |
7be57fc6 RA |
784 | |
785 | if (!bcl) | |
786 | return 0; | |
787 | ||
1da46568 | 788 | tipc_bclink_lock(net); |
7be57fc6 | 789 | |
bfb3e5dd | 790 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
7be57fc6 RA |
791 | NLM_F_MULTI, TIPC_NL_LINK_GET); |
792 | if (!hdr) | |
793 | return -EMSGSIZE; | |
794 | ||
795 | attrs = nla_nest_start(msg->skb, TIPC_NLA_LINK); | |
796 | if (!attrs) | |
797 | goto msg_full; | |
798 | ||
799 | /* The broadcast link is always up */ | |
800 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP)) | |
801 | goto attr_msg_full; | |
802 | ||
803 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_BROADCAST)) | |
804 | goto attr_msg_full; | |
805 | if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, bcl->name)) | |
806 | goto attr_msg_full; | |
a97b9d3f | 807 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, bcl->rcv_nxt)) |
7be57fc6 | 808 | goto attr_msg_full; |
a97b9d3f | 809 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, bcl->snd_nxt)) |
7be57fc6 RA |
810 | goto attr_msg_full; |
811 | ||
812 | prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP); | |
813 | if (!prop) | |
814 | goto attr_msg_full; | |
1f66d161 | 815 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->window)) |
7be57fc6 RA |
816 | goto prop_msg_full; |
817 | nla_nest_end(msg->skb, prop); | |
818 | ||
819 | err = __tipc_nl_add_bc_link_stat(msg->skb, &bcl->stats); | |
820 | if (err) | |
821 | goto attr_msg_full; | |
822 | ||
1da46568 | 823 | tipc_bclink_unlock(net); |
7be57fc6 RA |
824 | nla_nest_end(msg->skb, attrs); |
825 | genlmsg_end(msg->skb, hdr); | |
826 | ||
827 | return 0; | |
828 | ||
829 | prop_msg_full: | |
830 | nla_nest_cancel(msg->skb, prop); | |
831 | attr_msg_full: | |
832 | nla_nest_cancel(msg->skb, attrs); | |
833 | msg_full: | |
1da46568 | 834 | tipc_bclink_unlock(net); |
7be57fc6 RA |
835 | genlmsg_cancel(msg->skb, hdr); |
836 | ||
837 | return -EMSGSIZE; | |
838 | } | |
b97bf3fd | 839 | |
1da46568 | 840 | int tipc_bclink_reset_stats(struct net *net) |
b97bf3fd | 841 | { |
1da46568 YX |
842 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
843 | struct tipc_link *bcl = tn->bcl; | |
844 | ||
b97bf3fd PL |
845 | if (!bcl) |
846 | return -ENOPROTOOPT; | |
847 | ||
1da46568 | 848 | tipc_bclink_lock(net); |
b97bf3fd | 849 | memset(&bcl->stats, 0, sizeof(bcl->stats)); |
1da46568 | 850 | tipc_bclink_unlock(net); |
0e35fd5e | 851 | return 0; |
b97bf3fd PL |
852 | } |
853 | ||
1da46568 | 854 | int tipc_bclink_set_queue_limits(struct net *net, u32 limit) |
b97bf3fd | 855 | { |
1da46568 YX |
856 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
857 | struct tipc_link *bcl = tn->bcl; | |
858 | ||
b97bf3fd PL |
859 | if (!bcl) |
860 | return -ENOPROTOOPT; | |
861 | if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN)) | |
862 | return -EINVAL; | |
863 | ||
1da46568 | 864 | tipc_bclink_lock(net); |
4323add6 | 865 | tipc_link_set_queue_limits(bcl, limit); |
1da46568 | 866 | tipc_bclink_unlock(net); |
0e35fd5e | 867 | return 0; |
b97bf3fd PL |
868 | } |
869 | ||
670f4f88 RA |
870 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]) |
871 | { | |
872 | int err; | |
873 | u32 win; | |
874 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
875 | ||
876 | if (!attrs[TIPC_NLA_LINK_PROP]) | |
877 | return -EINVAL; | |
878 | ||
879 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props); | |
880 | if (err) | |
881 | return err; | |
882 | ||
883 | if (!props[TIPC_NLA_PROP_WIN]) | |
884 | return -EOPNOTSUPP; | |
885 | ||
886 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
887 | ||
888 | return tipc_bclink_set_queue_limits(net, win); | |
889 | } | |
890 | ||
7f9f95d9 | 891 | int tipc_bclink_init(struct net *net) |
b97bf3fd | 892 | { |
7f9f95d9 | 893 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 YX |
894 | struct tipc_bcbearer *bcbearer; |
895 | struct tipc_bclink *bclink; | |
896 | struct tipc_link *bcl; | |
7f9f95d9 | 897 | |
eb8b00f5 YX |
898 | bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); |
899 | if (!bcbearer) | |
900 | return -ENOMEM; | |
901 | ||
902 | bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); | |
903 | if (!bclink) { | |
904 | kfree(bcbearer); | |
905 | return -ENOMEM; | |
906 | } | |
907 | ||
908 | bcl = &bclink->link; | |
b97bf3fd | 909 | bcbearer->bearer.media = &bcbearer->media; |
4323add6 | 910 | bcbearer->media.send_msg = tipc_bcbearer_send; |
2e2d9be8 | 911 | sprintf(bcbearer->media.name, "tipc-broadcast"); |
b97bf3fd | 912 | |
d69afc90 | 913 | spin_lock_init(&bclink->lock); |
05dcc5aa JPM |
914 | __skb_queue_head_init(&bcl->transmq); |
915 | __skb_queue_head_init(&bcl->backlogq); | |
916 | __skb_queue_head_init(&bcl->deferdq); | |
c637c103 | 917 | skb_queue_head_init(&bcl->wakeupq); |
a97b9d3f | 918 | bcl->snd_nxt = 1; |
34af946a | 919 | spin_lock_init(&bclink->node.lock); |
cb1b7280 JPM |
920 | __skb_queue_head_init(&bclink->arrvq); |
921 | skb_queue_head_init(&bclink->inputq); | |
b97bf3fd | 922 | bcl->owner = &bclink->node; |
1da46568 | 923 | bcl->owner->net = net; |
ed193ece | 924 | bcl->mtu = MAX_PKT_DEFAULT_MCAST; |
4323add6 | 925 | tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); |
7a2f7d18 | 926 | bcl->bearer_id = MAX_BEARERS; |
7f9f95d9 | 927 | rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcbearer->bearer); |
b97bf3fd | 928 | bcl->state = WORKING_WORKING; |
c5898636 JPM |
929 | bcl->pmsg = (struct tipc_msg *)&bcl->proto_msg; |
930 | msg_set_prevnode(bcl->pmsg, tn->own_addr); | |
4b704d59 | 931 | strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); |
1da46568 YX |
932 | tn->bcbearer = bcbearer; |
933 | tn->bclink = bclink; | |
934 | tn->bcl = bcl; | |
eb8b00f5 | 935 | return 0; |
b97bf3fd PL |
936 | } |
937 | ||
7f9f95d9 | 938 | void tipc_bclink_stop(struct net *net) |
b97bf3fd | 939 | { |
7f9f95d9 YX |
940 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
941 | ||
1da46568 YX |
942 | tipc_bclink_lock(net); |
943 | tipc_link_purge_queues(tn->bcl); | |
944 | tipc_bclink_unlock(net); | |
c47e9b91 | 945 | |
7f9f95d9 | 946 | RCU_INIT_POINTER(tn->bearer_list[BCBEARER], NULL); |
eb8b00f5 | 947 | synchronize_net(); |
1da46568 YX |
948 | kfree(tn->bcbearer); |
949 | kfree(tn->bclink); | |
b97bf3fd PL |
950 | } |
951 | ||
3e22e62b AS |
952 | /** |
953 | * tipc_nmap_add - add a node to a node map | |
954 | */ | |
28dd9418 | 955 | static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node) |
3e22e62b AS |
956 | { |
957 | int n = tipc_node(node); | |
958 | int w = n / WSIZE; | |
959 | u32 mask = (1 << (n % WSIZE)); | |
960 | ||
961 | if ((nm_ptr->map[w] & mask) == 0) { | |
962 | nm_ptr->count++; | |
963 | nm_ptr->map[w] |= mask; | |
964 | } | |
965 | } | |
966 | ||
967 | /** | |
968 | * tipc_nmap_remove - remove a node from a node map | |
969 | */ | |
28dd9418 | 970 | static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node) |
3e22e62b AS |
971 | { |
972 | int n = tipc_node(node); | |
973 | int w = n / WSIZE; | |
974 | u32 mask = (1 << (n % WSIZE)); | |
975 | ||
976 | if ((nm_ptr->map[w] & mask) != 0) { | |
977 | nm_ptr->map[w] &= ~mask; | |
978 | nm_ptr->count--; | |
979 | } | |
980 | } | |
981 | ||
982 | /** | |
983 | * tipc_nmap_diff - find differences between node maps | |
984 | * @nm_a: input node map A | |
985 | * @nm_b: input node map B | |
986 | * @nm_diff: output node map A-B (i.e. nodes of A that are not in B) | |
987 | */ | |
31e3c3f6 | 988 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
989 | struct tipc_node_map *nm_b, | |
990 | struct tipc_node_map *nm_diff) | |
3e22e62b AS |
991 | { |
992 | int stop = ARRAY_SIZE(nm_a->map); | |
993 | int w; | |
994 | int b; | |
995 | u32 map; | |
996 | ||
997 | memset(nm_diff, 0, sizeof(*nm_diff)); | |
998 | for (w = 0; w < stop; w++) { | |
999 | map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]); | |
1000 | nm_diff->map[w] = map; | |
1001 | if (map != 0) { | |
1002 | for (b = 0 ; b < WSIZE; b++) { | |
1003 | if (map & (1 << b)) | |
1004 | nm_diff->count++; | |
1005 | } | |
1006 | } | |
1007 | } | |
1008 | } |