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