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Commit | Line | Data |
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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 YX |
65 | struct tipc_node *node = NULL; |
66 | ||
1da46568 YX |
67 | if (likely(!tn->bclink->flags)) { |
68 | spin_unlock_bh(&tn->bclink->lock); | |
3f5a12bd YX |
69 | return; |
70 | } | |
71 | ||
1da46568 YX |
72 | if (tn->bclink->flags & TIPC_BCLINK_RESET) { |
73 | tn->bclink->flags &= ~TIPC_BCLINK_RESET; | |
74 | node = tipc_bclink_retransmit_to(net); | |
3f5a12bd | 75 | } |
1da46568 | 76 | spin_unlock_bh(&tn->bclink->lock); |
3f5a12bd YX |
77 | |
78 | if (node) | |
79 | tipc_link_reset_all(node); | |
80 | } | |
81 | ||
cb1b7280 JPM |
82 | void tipc_bclink_input(struct net *net) |
83 | { | |
84 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
85 | ||
86 | tipc_sk_mcast_rcv(net, &tn->bclink->arrvq, &tn->bclink->inputq); | |
87 | } | |
88 | ||
078bec82 JPM |
89 | uint tipc_bclink_get_mtu(void) |
90 | { | |
91 | return MAX_PKT_DEFAULT_MCAST; | |
92 | } | |
93 | ||
1da46568 | 94 | void tipc_bclink_set_flags(struct net *net, unsigned int flags) |
3f5a12bd | 95 | { |
1da46568 YX |
96 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
97 | ||
98 | tn->bclink->flags |= flags; | |
d69afc90 YX |
99 | } |
100 | ||
05790c64 | 101 | static u32 bcbuf_acks(struct sk_buff *buf) |
b97bf3fd | 102 | { |
880b005f | 103 | return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle; |
b97bf3fd PL |
104 | } |
105 | ||
05790c64 | 106 | static void bcbuf_set_acks(struct sk_buff *buf, u32 acks) |
b97bf3fd | 107 | { |
880b005f | 108 | TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks; |
b97bf3fd PL |
109 | } |
110 | ||
05790c64 | 111 | static void bcbuf_decr_acks(struct sk_buff *buf) |
b97bf3fd PL |
112 | { |
113 | bcbuf_set_acks(buf, bcbuf_acks(buf) - 1); | |
114 | } | |
115 | ||
1da46568 | 116 | void tipc_bclink_add_node(struct net *net, u32 addr) |
cd3decdf | 117 | { |
1da46568 YX |
118 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
119 | ||
120 | tipc_bclink_lock(net); | |
121 | tipc_nmap_add(&tn->bclink->bcast_nodes, addr); | |
122 | tipc_bclink_unlock(net); | |
cd3decdf AS |
123 | } |
124 | ||
1da46568 | 125 | void tipc_bclink_remove_node(struct net *net, u32 addr) |
cd3decdf | 126 | { |
1da46568 YX |
127 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
128 | ||
129 | tipc_bclink_lock(net); | |
130 | tipc_nmap_remove(&tn->bclink->bcast_nodes, addr); | |
131 | tipc_bclink_unlock(net); | |
cd3decdf | 132 | } |
b97bf3fd | 133 | |
1da46568 | 134 | static void bclink_set_last_sent(struct net *net) |
5b1f7bde | 135 | { |
1da46568 YX |
136 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
137 | struct tipc_link *bcl = tn->bcl; | |
138 | ||
5b1f7bde AS |
139 | if (bcl->next_out) |
140 | bcl->fsm_msg_cnt = mod(buf_seqno(bcl->next_out) - 1); | |
141 | else | |
142 | bcl->fsm_msg_cnt = mod(bcl->next_out_no - 1); | |
143 | } | |
144 | ||
1da46568 | 145 | u32 tipc_bclink_get_last_sent(struct net *net) |
5b1f7bde | 146 | { |
1da46568 YX |
147 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
148 | ||
149 | return tn->bcl->fsm_msg_cnt; | |
5b1f7bde AS |
150 | } |
151 | ||
7a54d4a9 | 152 | static void bclink_update_last_sent(struct tipc_node *node, u32 seqno) |
b97bf3fd | 153 | { |
7a54d4a9 AS |
154 | node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ? |
155 | seqno : node->bclink.last_sent; | |
b97bf3fd PL |
156 | } |
157 | ||
b97bf3fd | 158 | |
2c53040f | 159 | /** |
01d83edd AS |
160 | * tipc_bclink_retransmit_to - get most recent node to request retransmission |
161 | * | |
d69afc90 | 162 | * Called with bclink_lock locked |
01d83edd | 163 | */ |
1da46568 | 164 | struct tipc_node *tipc_bclink_retransmit_to(struct net *net) |
01d83edd | 165 | { |
1da46568 YX |
166 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
167 | ||
168 | return tn->bclink->retransmit_to; | |
01d83edd AS |
169 | } |
170 | ||
c4307285 | 171 | /** |
b97bf3fd PL |
172 | * bclink_retransmit_pkt - retransmit broadcast packets |
173 | * @after: sequence number of last packet to *not* retransmit | |
174 | * @to: sequence number of last packet to retransmit | |
c4307285 | 175 | * |
d69afc90 | 176 | * Called with bclink_lock locked |
b97bf3fd | 177 | */ |
1da46568 | 178 | static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to) |
b97bf3fd | 179 | { |
58dc55f2 | 180 | struct sk_buff *skb; |
1da46568 | 181 | struct tipc_link *bcl = tn->bcl; |
b97bf3fd | 182 | |
58dc55f2 | 183 | skb_queue_walk(&bcl->outqueue, skb) { |
703068ee JM |
184 | if (more(buf_seqno(skb), after)) { |
185 | tipc_link_retransmit(bcl, skb, mod(to - after)); | |
58dc55f2 | 186 | break; |
703068ee | 187 | } |
58dc55f2 | 188 | } |
b97bf3fd PL |
189 | } |
190 | ||
908344cd JM |
191 | /** |
192 | * tipc_bclink_wakeup_users - wake up pending users | |
193 | * | |
194 | * Called with no locks taken | |
195 | */ | |
f2f9800d | 196 | void tipc_bclink_wakeup_users(struct net *net) |
908344cd | 197 | { |
1da46568 | 198 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
4988bb4a | 199 | |
c637c103 | 200 | tipc_sk_rcv(net, &tn->bclink->link.wakeupq); |
908344cd JM |
201 | } |
202 | ||
c4307285 | 203 | /** |
4323add6 | 204 | * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets |
b97bf3fd PL |
205 | * @n_ptr: node that sent acknowledgement info |
206 | * @acked: broadcast sequence # that has been acknowledged | |
c4307285 | 207 | * |
d69afc90 | 208 | * Node is locked, bclink_lock unlocked. |
b97bf3fd | 209 | */ |
6c00055a | 210 | void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked) |
b97bf3fd | 211 | { |
58dc55f2 | 212 | struct sk_buff *skb, *tmp; |
b97bf3fd PL |
213 | struct sk_buff *next; |
214 | unsigned int released = 0; | |
1da46568 YX |
215 | struct net *net = n_ptr->net; |
216 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
b97bf3fd | 217 | |
1da46568 | 218 | tipc_bclink_lock(net); |
36559591 | 219 | /* Bail out if tx queue is empty (no clean up is required) */ |
1da46568 | 220 | skb = skb_peek(&tn->bcl->outqueue); |
58dc55f2 | 221 | if (!skb) |
36559591 AS |
222 | goto exit; |
223 | ||
224 | /* Determine which messages need to be acknowledged */ | |
225 | if (acked == INVALID_LINK_SEQ) { | |
226 | /* | |
227 | * Contact with specified node has been lost, so need to | |
228 | * acknowledge sent messages only (if other nodes still exist) | |
229 | * or both sent and unsent messages (otherwise) | |
230 | */ | |
1da46568 YX |
231 | if (tn->bclink->bcast_nodes.count) |
232 | acked = tn->bcl->fsm_msg_cnt; | |
36559591 | 233 | else |
1da46568 | 234 | acked = tn->bcl->next_out_no; |
36559591 AS |
235 | } else { |
236 | /* | |
237 | * Bail out if specified sequence number does not correspond | |
238 | * to a message that has been sent and not yet acknowledged | |
239 | */ | |
58dc55f2 | 240 | if (less(acked, buf_seqno(skb)) || |
1da46568 | 241 | less(tn->bcl->fsm_msg_cnt, acked) || |
36559591 AS |
242 | less_eq(acked, n_ptr->bclink.acked)) |
243 | goto exit; | |
244 | } | |
245 | ||
246 | /* Skip over packets that node has previously acknowledged */ | |
1da46568 | 247 | skb_queue_walk(&tn->bcl->outqueue, skb) { |
58dc55f2 YX |
248 | if (more(buf_seqno(skb), n_ptr->bclink.acked)) |
249 | break; | |
250 | } | |
b97bf3fd PL |
251 | |
252 | /* Update packets that node is now acknowledging */ | |
1da46568 | 253 | skb_queue_walk_from_safe(&tn->bcl->outqueue, skb, tmp) { |
58dc55f2 YX |
254 | if (more(buf_seqno(skb), acked)) |
255 | break; | |
b97bf3fd | 256 | |
1da46568 YX |
257 | next = tipc_skb_queue_next(&tn->bcl->outqueue, skb); |
258 | if (skb != tn->bcl->next_out) { | |
58dc55f2 YX |
259 | bcbuf_decr_acks(skb); |
260 | } else { | |
261 | bcbuf_set_acks(skb, 0); | |
1da46568 YX |
262 | tn->bcl->next_out = next; |
263 | bclink_set_last_sent(net); | |
10745cd5 AS |
264 | } |
265 | ||
58dc55f2 | 266 | if (bcbuf_acks(skb) == 0) { |
1da46568 | 267 | __skb_unlink(skb, &tn->bcl->outqueue); |
58dc55f2 | 268 | kfree_skb(skb); |
b97bf3fd PL |
269 | released = 1; |
270 | } | |
b97bf3fd PL |
271 | } |
272 | n_ptr->bclink.acked = acked; | |
273 | ||
274 | /* Try resolving broadcast link congestion, if necessary */ | |
1da46568 YX |
275 | if (unlikely(tn->bcl->next_out)) { |
276 | tipc_link_push_packets(tn->bcl); | |
277 | bclink_set_last_sent(net); | |
5b1f7bde | 278 | } |
c637c103 | 279 | if (unlikely(released && !skb_queue_empty(&tn->bcl->wakeupq))) |
908344cd | 280 | n_ptr->action_flags |= TIPC_WAKEUP_BCAST_USERS; |
36559591 | 281 | exit: |
1da46568 | 282 | tipc_bclink_unlock(net); |
b97bf3fd PL |
283 | } |
284 | ||
2c53040f | 285 | /** |
7a54d4a9 | 286 | * tipc_bclink_update_link_state - update broadcast link state |
c4307285 | 287 | * |
7216cd94 | 288 | * RCU and node lock set |
b97bf3fd | 289 | */ |
c5898636 | 290 | void tipc_bclink_update_link_state(struct tipc_node *n_ptr, |
c93d3baa | 291 | u32 last_sent) |
b97bf3fd | 292 | { |
7a54d4a9 | 293 | struct sk_buff *buf; |
c5898636 | 294 | struct net *net = n_ptr->net; |
c93d3baa | 295 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
b97bf3fd | 296 | |
7a54d4a9 | 297 | /* Ignore "stale" link state info */ |
7a54d4a9 AS |
298 | if (less_eq(last_sent, n_ptr->bclink.last_in)) |
299 | return; | |
b97bf3fd | 300 | |
7a54d4a9 | 301 | /* Update link synchronization state; quit if in sync */ |
7a54d4a9 AS |
302 | bclink_update_last_sent(n_ptr, last_sent); |
303 | ||
304 | if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in) | |
305 | return; | |
306 | ||
307 | /* Update out-of-sync state; quit if loss is still unconfirmed */ | |
7a54d4a9 AS |
308 | if ((++n_ptr->bclink.oos_state) == 1) { |
309 | if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2)) | |
310 | return; | |
311 | n_ptr->bclink.oos_state++; | |
312 | } | |
313 | ||
314 | /* Don't NACK if one has been recently sent (or seen) */ | |
7a54d4a9 | 315 | if (n_ptr->bclink.oos_state & 0x1) |
b97bf3fd PL |
316 | return; |
317 | ||
7a54d4a9 | 318 | /* Send NACK */ |
31e3c3f6 | 319 | buf = tipc_buf_acquire(INT_H_SIZE); |
b97bf3fd | 320 | if (buf) { |
7a54d4a9 | 321 | struct tipc_msg *msg = buf_msg(buf); |
bc6fecd4 YX |
322 | struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferred_queue); |
323 | u32 to = skb ? buf_seqno(skb) - 1 : n_ptr->bclink.last_sent; | |
7a54d4a9 | 324 | |
c5898636 | 325 | tipc_msg_init(tn->own_addr, msg, BCAST_PROTOCOL, STATE_MSG, |
7a54d4a9 | 326 | INT_H_SIZE, n_ptr->addr); |
bf781ecf | 327 | msg_set_non_seq(msg, 1); |
c93d3baa | 328 | msg_set_mc_netid(msg, tn->net_id); |
7a54d4a9 AS |
329 | msg_set_bcast_ack(msg, n_ptr->bclink.last_in); |
330 | msg_set_bcgap_after(msg, n_ptr->bclink.last_in); | |
bc6fecd4 | 331 | msg_set_bcgap_to(msg, to); |
b97bf3fd | 332 | |
1da46568 | 333 | tipc_bclink_lock(net); |
7f9f95d9 | 334 | tipc_bearer_send(net, MAX_BEARERS, buf, NULL); |
1da46568 YX |
335 | tn->bcl->stats.sent_nacks++; |
336 | tipc_bclink_unlock(net); | |
5f6d9123 | 337 | kfree_skb(buf); |
b97bf3fd | 338 | |
7a54d4a9 | 339 | n_ptr->bclink.oos_state++; |
b97bf3fd PL |
340 | } |
341 | } | |
342 | ||
2c53040f | 343 | /** |
7a54d4a9 | 344 | * bclink_peek_nack - monitor retransmission requests sent by other nodes |
b97bf3fd | 345 | * |
7a54d4a9 AS |
346 | * Delay any upcoming NACK by this node if another node has already |
347 | * requested the first message this node is going to ask for. | |
b97bf3fd | 348 | */ |
f2f9800d | 349 | static void bclink_peek_nack(struct net *net, struct tipc_msg *msg) |
b97bf3fd | 350 | { |
f2f9800d | 351 | struct tipc_node *n_ptr = tipc_node_find(net, msg_destnode(msg)); |
b97bf3fd | 352 | |
7a54d4a9 | 353 | if (unlikely(!n_ptr)) |
b97bf3fd | 354 | return; |
7a54d4a9 | 355 | |
4323add6 | 356 | tipc_node_lock(n_ptr); |
7a54d4a9 | 357 | |
389dd9bc | 358 | if (n_ptr->bclink.recv_permitted && |
7a54d4a9 AS |
359 | (n_ptr->bclink.last_in != n_ptr->bclink.last_sent) && |
360 | (n_ptr->bclink.last_in == msg_bcgap_after(msg))) | |
361 | n_ptr->bclink.oos_state = 2; | |
362 | ||
4323add6 | 363 | tipc_node_unlock(n_ptr); |
b97bf3fd PL |
364 | } |
365 | ||
cb1b7280 | 366 | /* tipc_bclink_xmit - deliver buffer chain to all nodes in cluster |
9fbfb8b1 | 367 | * and to identified node local sockets |
f2f9800d | 368 | * @net: the applicable net namespace |
a6ca1094 | 369 | * @list: chain of buffers containing message |
078bec82 JPM |
370 | * Consumes the buffer chain, except when returning -ELINKCONG |
371 | * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE | |
372 | */ | |
f2f9800d | 373 | int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list) |
078bec82 | 374 | { |
1da46568 YX |
375 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
376 | struct tipc_link *bcl = tn->bcl; | |
377 | struct tipc_bclink *bclink = tn->bclink; | |
078bec82 JPM |
378 | int rc = 0; |
379 | int bc = 0; | |
a6ca1094 | 380 | struct sk_buff *skb; |
cb1b7280 JPM |
381 | struct sk_buff_head arrvq; |
382 | struct sk_buff_head inputq; | |
078bec82 JPM |
383 | |
384 | /* Prepare clone of message for local node */ | |
a6ca1094 YX |
385 | skb = tipc_msg_reassemble(list); |
386 | if (unlikely(!skb)) { | |
387 | __skb_queue_purge(list); | |
078bec82 JPM |
388 | return -EHOSTUNREACH; |
389 | } | |
390 | ||
cb1b7280 | 391 | /* Broadcast to all nodes */ |
078bec82 | 392 | if (likely(bclink)) { |
1da46568 | 393 | tipc_bclink_lock(net); |
078bec82 | 394 | if (likely(bclink->bcast_nodes.count)) { |
7f9f95d9 | 395 | rc = __tipc_link_xmit(net, bcl, list); |
078bec82 | 396 | if (likely(!rc)) { |
58dc55f2 YX |
397 | u32 len = skb_queue_len(&bcl->outqueue); |
398 | ||
1da46568 | 399 | bclink_set_last_sent(net); |
078bec82 | 400 | bcl->stats.queue_sz_counts++; |
58dc55f2 | 401 | bcl->stats.accu_queue_sz += len; |
078bec82 JPM |
402 | } |
403 | bc = 1; | |
404 | } | |
1da46568 | 405 | tipc_bclink_unlock(net); |
078bec82 JPM |
406 | } |
407 | ||
408 | if (unlikely(!bc)) | |
a6ca1094 | 409 | __skb_queue_purge(list); |
078bec82 | 410 | |
cb1b7280 | 411 | if (unlikely(rc)) { |
a6ca1094 | 412 | kfree_skb(skb); |
cb1b7280 JPM |
413 | return rc; |
414 | } | |
415 | /* Deliver message clone */ | |
416 | __skb_queue_head_init(&arrvq); | |
417 | skb_queue_head_init(&inputq); | |
418 | __skb_queue_tail(&arrvq, skb); | |
419 | tipc_sk_mcast_rcv(net, &arrvq, &inputq); | |
078bec82 JPM |
420 | return rc; |
421 | } | |
422 | ||
2c53040f | 423 | /** |
63e7f1ac AS |
424 | * bclink_accept_pkt - accept an incoming, in-sequence broadcast packet |
425 | * | |
d69afc90 | 426 | * Called with both sending node's lock and bclink_lock taken. |
63e7f1ac | 427 | */ |
63e7f1ac AS |
428 | static void bclink_accept_pkt(struct tipc_node *node, u32 seqno) |
429 | { | |
1da46568 YX |
430 | struct tipc_net *tn = net_generic(node->net, tipc_net_id); |
431 | ||
63e7f1ac AS |
432 | bclink_update_last_sent(node, seqno); |
433 | node->bclink.last_in = seqno; | |
434 | node->bclink.oos_state = 0; | |
1da46568 | 435 | tn->bcl->stats.recv_info++; |
63e7f1ac AS |
436 | |
437 | /* | |
438 | * Unicast an ACK periodically, ensuring that | |
439 | * all nodes in the cluster don't ACK at the same time | |
440 | */ | |
34747539 | 441 | if (((seqno - tn->own_addr) % TIPC_MIN_LINK_WIN) == 0) { |
247f0f3c YX |
442 | tipc_link_proto_xmit(node->active_links[node->addr & 1], |
443 | STATE_MSG, 0, 0, 0, 0, 0); | |
1da46568 | 444 | tn->bcl->stats.sent_acks++; |
63e7f1ac AS |
445 | } |
446 | } | |
447 | ||
2c53040f | 448 | /** |
247f0f3c | 449 | * tipc_bclink_rcv - receive a broadcast packet, and deliver upwards |
c4307285 | 450 | * |
7216cd94 | 451 | * RCU is locked, no other locks set |
b97bf3fd | 452 | */ |
c93d3baa | 453 | void tipc_bclink_rcv(struct net *net, struct sk_buff *buf) |
d356eeba | 454 | { |
c93d3baa | 455 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 | 456 | struct tipc_link *bcl = tn->bcl; |
b97bf3fd | 457 | struct tipc_msg *msg = buf_msg(buf); |
5d3c488d | 458 | struct tipc_node *node; |
b97bf3fd PL |
459 | u32 next_in; |
460 | u32 seqno; | |
0abd8ff2 | 461 | int deferred = 0; |
c637c103 JPM |
462 | int pos = 0; |
463 | struct sk_buff *iskb; | |
cb1b7280 | 464 | struct sk_buff_head *arrvq, *inputq; |
b97bf3fd | 465 | |
5d3c488d | 466 | /* Screen out unwanted broadcast messages */ |
c93d3baa | 467 | if (msg_mc_netid(msg) != tn->net_id) |
5d3c488d AS |
468 | goto exit; |
469 | ||
f2f9800d | 470 | node = tipc_node_find(net, msg_prevnode(msg)); |
5d3c488d AS |
471 | if (unlikely(!node)) |
472 | goto exit; | |
473 | ||
474 | tipc_node_lock(node); | |
389dd9bc | 475 | if (unlikely(!node->bclink.recv_permitted)) |
5d3c488d | 476 | goto unlock; |
b97bf3fd | 477 | |
8a275a6a | 478 | /* Handle broadcast protocol message */ |
b97bf3fd | 479 | if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) { |
9f6bdcd4 AS |
480 | if (msg_type(msg) != STATE_MSG) |
481 | goto unlock; | |
34747539 | 482 | if (msg_destnode(msg) == tn->own_addr) { |
4323add6 PL |
483 | tipc_bclink_acknowledge(node, msg_bcast_ack(msg)); |
484 | tipc_node_unlock(node); | |
1da46568 | 485 | tipc_bclink_lock(net); |
b97bf3fd | 486 | bcl->stats.recv_nacks++; |
1da46568 YX |
487 | tn->bclink->retransmit_to = node; |
488 | bclink_retransmit_pkt(tn, msg_bcgap_after(msg), | |
b97bf3fd | 489 | msg_bcgap_to(msg)); |
1da46568 | 490 | tipc_bclink_unlock(net); |
b97bf3fd | 491 | } else { |
5d3c488d | 492 | tipc_node_unlock(node); |
f2f9800d | 493 | bclink_peek_nack(net, msg); |
b97bf3fd | 494 | } |
5d3c488d | 495 | goto exit; |
b97bf3fd PL |
496 | } |
497 | ||
5d3c488d | 498 | /* Handle in-sequence broadcast message */ |
b97bf3fd | 499 | seqno = msg_seqno(msg); |
8a275a6a | 500 | next_in = mod(node->bclink.last_in + 1); |
cb1b7280 JPM |
501 | arrvq = &tn->bclink->arrvq; |
502 | inputq = &tn->bclink->inputq; | |
b97bf3fd PL |
503 | |
504 | if (likely(seqno == next_in)) { | |
8a275a6a | 505 | receive: |
7a54d4a9 | 506 | /* Deliver message to destination */ |
b97bf3fd | 507 | if (likely(msg_isdata(msg))) { |
1da46568 | 508 | tipc_bclink_lock(net); |
63e7f1ac | 509 | bclink_accept_pkt(node, seqno); |
cb1b7280 JPM |
510 | spin_lock_bh(&inputq->lock); |
511 | __skb_queue_tail(arrvq, buf); | |
512 | spin_unlock_bh(&inputq->lock); | |
513 | node->action_flags |= TIPC_BCAST_MSG_EVT; | |
1da46568 | 514 | tipc_bclink_unlock(net); |
4323add6 | 515 | tipc_node_unlock(node); |
b97bf3fd | 516 | } else if (msg_user(msg) == MSG_BUNDLER) { |
1da46568 | 517 | tipc_bclink_lock(net); |
63e7f1ac | 518 | bclink_accept_pkt(node, seqno); |
b97bf3fd PL |
519 | bcl->stats.recv_bundles++; |
520 | bcl->stats.recv_bundled += msg_msgcnt(msg); | |
cb1b7280 JPM |
521 | pos = 0; |
522 | while (tipc_msg_extract(buf, &iskb, &pos)) { | |
523 | spin_lock_bh(&inputq->lock); | |
524 | __skb_queue_tail(arrvq, iskb); | |
525 | spin_unlock_bh(&inputq->lock); | |
526 | } | |
527 | node->action_flags |= TIPC_BCAST_MSG_EVT; | |
1da46568 | 528 | tipc_bclink_unlock(net); |
4323add6 | 529 | tipc_node_unlock(node); |
b97bf3fd | 530 | } else if (msg_user(msg) == MSG_FRAGMENTER) { |
37e22164 JPM |
531 | tipc_buf_append(&node->bclink.reasm_buf, &buf); |
532 | if (unlikely(!buf && !node->bclink.reasm_buf)) | |
63e7f1ac | 533 | goto unlock; |
1da46568 | 534 | tipc_bclink_lock(net); |
63e7f1ac | 535 | bclink_accept_pkt(node, seqno); |
b97bf3fd | 536 | bcl->stats.recv_fragments++; |
37e22164 | 537 | if (buf) { |
b97bf3fd | 538 | bcl->stats.recv_fragmented++; |
40ba3cdf | 539 | msg = buf_msg(buf); |
1da46568 | 540 | tipc_bclink_unlock(net); |
528f6f4b EH |
541 | goto receive; |
542 | } | |
1da46568 | 543 | tipc_bclink_unlock(net); |
4323add6 | 544 | tipc_node_unlock(node); |
b97bf3fd | 545 | } else { |
1da46568 | 546 | tipc_bclink_lock(net); |
63e7f1ac | 547 | bclink_accept_pkt(node, seqno); |
1da46568 | 548 | tipc_bclink_unlock(net); |
4323add6 | 549 | tipc_node_unlock(node); |
5f6d9123 | 550 | kfree_skb(buf); |
b97bf3fd | 551 | } |
5d3c488d | 552 | buf = NULL; |
8a275a6a AS |
553 | |
554 | /* Determine new synchronization state */ | |
5d3c488d | 555 | tipc_node_lock(node); |
8a275a6a AS |
556 | if (unlikely(!tipc_node_is_up(node))) |
557 | goto unlock; | |
558 | ||
7a54d4a9 | 559 | if (node->bclink.last_in == node->bclink.last_sent) |
8a275a6a AS |
560 | goto unlock; |
561 | ||
bc6fecd4 | 562 | if (skb_queue_empty(&node->bclink.deferred_queue)) { |
7a54d4a9 AS |
563 | node->bclink.oos_state = 1; |
564 | goto unlock; | |
565 | } | |
566 | ||
bc6fecd4 | 567 | msg = buf_msg(skb_peek(&node->bclink.deferred_queue)); |
8a275a6a AS |
568 | seqno = msg_seqno(msg); |
569 | next_in = mod(next_in + 1); | |
570 | if (seqno != next_in) | |
571 | goto unlock; | |
572 | ||
573 | /* Take in-sequence message from deferred queue & deliver it */ | |
bc6fecd4 | 574 | buf = __skb_dequeue(&node->bclink.deferred_queue); |
8a275a6a AS |
575 | goto receive; |
576 | } | |
577 | ||
578 | /* Handle out-of-sequence broadcast message */ | |
8a275a6a | 579 | if (less(next_in, seqno)) { |
bc6fecd4 | 580 | deferred = tipc_link_defer_pkt(&node->bclink.deferred_queue, |
8a275a6a | 581 | buf); |
7a54d4a9 | 582 | bclink_update_last_sent(node, seqno); |
5d3c488d | 583 | buf = NULL; |
0abd8ff2 | 584 | } |
8a275a6a | 585 | |
1da46568 | 586 | tipc_bclink_lock(net); |
b98158e3 | 587 | |
8a275a6a AS |
588 | if (deferred) |
589 | bcl->stats.deferred_recv++; | |
0232c5a5 AS |
590 | else |
591 | bcl->stats.duplicates++; | |
8a275a6a | 592 | |
1da46568 | 593 | tipc_bclink_unlock(net); |
b98158e3 | 594 | |
5d3c488d | 595 | unlock: |
4323add6 | 596 | tipc_node_unlock(node); |
5d3c488d | 597 | exit: |
5f6d9123 | 598 | kfree_skb(buf); |
b97bf3fd PL |
599 | } |
600 | ||
6c00055a | 601 | u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr) |
b97bf3fd | 602 | { |
389dd9bc | 603 | return (n_ptr->bclink.recv_permitted && |
1da46568 | 604 | (tipc_bclink_get_last_sent(n_ptr->net) != n_ptr->bclink.acked)); |
b97bf3fd PL |
605 | } |
606 | ||
607 | ||
608 | /** | |
4323add6 | 609 | * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer |
c4307285 | 610 | * |
2ff9f924 AS |
611 | * Send packet over as many bearers as necessary to reach all nodes |
612 | * that have joined the broadcast link. | |
c4307285 | 613 | * |
2ff9f924 AS |
614 | * Returns 0 (packet sent successfully) under all circumstances, |
615 | * since the broadcast link's pseudo-bearer never blocks | |
b97bf3fd | 616 | */ |
1da46568 YX |
617 | static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf, |
618 | struct tipc_bearer *unused1, | |
988f088a | 619 | struct tipc_media_addr *unused2) |
b97bf3fd | 620 | { |
b97bf3fd | 621 | int bp_index; |
6f92ee54 | 622 | struct tipc_msg *msg = buf_msg(buf); |
c93d3baa | 623 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 YX |
624 | struct tipc_bcbearer *bcbearer = tn->bcbearer; |
625 | struct tipc_bclink *bclink = tn->bclink; | |
b97bf3fd | 626 | |
e6160710 | 627 | /* Prepare broadcast link message for reliable transmission, |
2ff9f924 AS |
628 | * if first time trying to send it; |
629 | * preparation is skipped for broadcast link protocol messages | |
630 | * since they are sent in an unreliable manner and don't need it | |
631 | */ | |
b97bf3fd | 632 | if (likely(!msg_non_seq(buf_msg(buf)))) { |
cd3decdf | 633 | bcbuf_set_acks(buf, bclink->bcast_nodes.count); |
40aecb1b | 634 | msg_set_non_seq(msg, 1); |
c93d3baa | 635 | msg_set_mc_netid(msg, tn->net_id); |
1da46568 | 636 | tn->bcl->stats.sent_info++; |
5e726900 | 637 | |
cd3decdf | 638 | if (WARN_ON(!bclink->bcast_nodes.count)) { |
5e726900 AS |
639 | dump_stack(); |
640 | return 0; | |
641 | } | |
b97bf3fd PL |
642 | } |
643 | ||
b97bf3fd | 644 | /* Send buffer over bearers until all targets reached */ |
cd3decdf | 645 | bcbearer->remains = bclink->bcast_nodes; |
b97bf3fd PL |
646 | |
647 | for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) { | |
2d627b92 AS |
648 | struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary; |
649 | struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary; | |
6f92ee54 JPM |
650 | struct tipc_bearer *bp[2] = {p, s}; |
651 | struct tipc_bearer *b = bp[msg_link_selector(msg)]; | |
488fc9af | 652 | struct sk_buff *tbuf; |
b97bf3fd PL |
653 | |
654 | if (!p) | |
e6160710 | 655 | break; /* No more bearers to try */ |
6f92ee54 JPM |
656 | if (!b) |
657 | b = p; | |
77861d9c | 658 | tipc_nmap_diff(&bcbearer->remains, &b->nodes, |
e6160710 | 659 | &bcbearer->remains_new); |
65f51ef0 | 660 | if (bcbearer->remains_new.count == bcbearer->remains.count) |
e6160710 | 661 | continue; /* Nothing added by bearer pair */ |
b97bf3fd | 662 | |
488fc9af GF |
663 | if (bp_index == 0) { |
664 | /* Use original buffer for first bearer */ | |
7f9f95d9 | 665 | tipc_bearer_send(net, b->identity, buf, &b->bcast_addr); |
488fc9af GF |
666 | } else { |
667 | /* Avoid concurrent buffer access */ | |
bad93e9d | 668 | tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC); |
488fc9af GF |
669 | if (!tbuf) |
670 | break; | |
7f9f95d9 YX |
671 | tipc_bearer_send(net, b->identity, tbuf, |
672 | &b->bcast_addr); | |
488fc9af GF |
673 | kfree_skb(tbuf); /* Bearer keeps a clone */ |
674 | } | |
65f51ef0 | 675 | if (bcbearer->remains_new.count == 0) |
e6160710 | 676 | break; /* All targets reached */ |
b97bf3fd | 677 | |
65f51ef0 | 678 | bcbearer->remains = bcbearer->remains_new; |
b97bf3fd | 679 | } |
c4307285 | 680 | |
2ff9f924 | 681 | return 0; |
b97bf3fd PL |
682 | } |
683 | ||
684 | /** | |
4323add6 | 685 | * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer |
b97bf3fd | 686 | */ |
7f9f95d9 YX |
687 | void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr, |
688 | u32 node, bool action) | |
b97bf3fd | 689 | { |
7f9f95d9 | 690 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 | 691 | struct tipc_bcbearer *bcbearer = tn->bcbearer; |
7f9ab6ac PG |
692 | struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp; |
693 | struct tipc_bcbearer_pair *bp_curr; | |
f8322dfc | 694 | struct tipc_bearer *b; |
b97bf3fd PL |
695 | int b_index; |
696 | int pri; | |
697 | ||
1da46568 | 698 | tipc_bclink_lock(net); |
b97bf3fd | 699 | |
28dd9418 YX |
700 | if (action) |
701 | tipc_nmap_add(nm_ptr, node); | |
702 | else | |
703 | tipc_nmap_remove(nm_ptr, node); | |
704 | ||
b97bf3fd | 705 | /* Group bearers by priority (can assume max of two per priority) */ |
b97bf3fd PL |
706 | memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp)); |
707 | ||
f8322dfc | 708 | rcu_read_lock(); |
b97bf3fd | 709 | for (b_index = 0; b_index < MAX_BEARERS; b_index++) { |
7f9f95d9 | 710 | b = rcu_dereference_rtnl(tn->bearer_list[b_index]); |
f47de12b | 711 | if (!b || !b->nodes.count) |
b97bf3fd PL |
712 | continue; |
713 | ||
714 | if (!bp_temp[b->priority].primary) | |
715 | bp_temp[b->priority].primary = b; | |
716 | else | |
717 | bp_temp[b->priority].secondary = b; | |
718 | } | |
f8322dfc | 719 | rcu_read_unlock(); |
b97bf3fd PL |
720 | |
721 | /* Create array of bearer pairs for broadcasting */ | |
b97bf3fd PL |
722 | bp_curr = bcbearer->bpairs; |
723 | memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs)); | |
724 | ||
16cb4b33 | 725 | for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) { |
b97bf3fd PL |
726 | |
727 | if (!bp_temp[pri].primary) | |
728 | continue; | |
729 | ||
730 | bp_curr->primary = bp_temp[pri].primary; | |
731 | ||
732 | if (bp_temp[pri].secondary) { | |
4323add6 PL |
733 | if (tipc_nmap_equal(&bp_temp[pri].primary->nodes, |
734 | &bp_temp[pri].secondary->nodes)) { | |
b97bf3fd PL |
735 | bp_curr->secondary = bp_temp[pri].secondary; |
736 | } else { | |
737 | bp_curr++; | |
738 | bp_curr->primary = bp_temp[pri].secondary; | |
739 | } | |
740 | } | |
741 | ||
742 | bp_curr++; | |
743 | } | |
744 | ||
1da46568 | 745 | tipc_bclink_unlock(net); |
b97bf3fd PL |
746 | } |
747 | ||
d8182804 RA |
748 | static int __tipc_nl_add_bc_link_stat(struct sk_buff *skb, |
749 | struct tipc_stats *stats) | |
7be57fc6 RA |
750 | { |
751 | int i; | |
752 | struct nlattr *nest; | |
753 | ||
754 | struct nla_map { | |
755 | __u32 key; | |
756 | __u32 val; | |
757 | }; | |
758 | ||
759 | struct nla_map map[] = { | |
760 | {TIPC_NLA_STATS_RX_INFO, stats->recv_info}, | |
761 | {TIPC_NLA_STATS_RX_FRAGMENTS, stats->recv_fragments}, | |
762 | {TIPC_NLA_STATS_RX_FRAGMENTED, stats->recv_fragmented}, | |
763 | {TIPC_NLA_STATS_RX_BUNDLES, stats->recv_bundles}, | |
764 | {TIPC_NLA_STATS_RX_BUNDLED, stats->recv_bundled}, | |
765 | {TIPC_NLA_STATS_TX_INFO, stats->sent_info}, | |
766 | {TIPC_NLA_STATS_TX_FRAGMENTS, stats->sent_fragments}, | |
767 | {TIPC_NLA_STATS_TX_FRAGMENTED, stats->sent_fragmented}, | |
768 | {TIPC_NLA_STATS_TX_BUNDLES, stats->sent_bundles}, | |
769 | {TIPC_NLA_STATS_TX_BUNDLED, stats->sent_bundled}, | |
770 | {TIPC_NLA_STATS_RX_NACKS, stats->recv_nacks}, | |
771 | {TIPC_NLA_STATS_RX_DEFERRED, stats->deferred_recv}, | |
772 | {TIPC_NLA_STATS_TX_NACKS, stats->sent_nacks}, | |
773 | {TIPC_NLA_STATS_TX_ACKS, stats->sent_acks}, | |
774 | {TIPC_NLA_STATS_RETRANSMITTED, stats->retransmitted}, | |
775 | {TIPC_NLA_STATS_DUPLICATES, stats->duplicates}, | |
776 | {TIPC_NLA_STATS_LINK_CONGS, stats->link_congs}, | |
777 | {TIPC_NLA_STATS_MAX_QUEUE, stats->max_queue_sz}, | |
778 | {TIPC_NLA_STATS_AVG_QUEUE, stats->queue_sz_counts ? | |
779 | (stats->accu_queue_sz / stats->queue_sz_counts) : 0} | |
780 | }; | |
781 | ||
782 | nest = nla_nest_start(skb, TIPC_NLA_LINK_STATS); | |
783 | if (!nest) | |
784 | return -EMSGSIZE; | |
785 | ||
786 | for (i = 0; i < ARRAY_SIZE(map); i++) | |
787 | if (nla_put_u32(skb, map[i].key, map[i].val)) | |
788 | goto msg_full; | |
789 | ||
790 | nla_nest_end(skb, nest); | |
791 | ||
792 | return 0; | |
793 | msg_full: | |
794 | nla_nest_cancel(skb, nest); | |
795 | ||
796 | return -EMSGSIZE; | |
797 | } | |
798 | ||
1da46568 | 799 | int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg) |
7be57fc6 RA |
800 | { |
801 | int err; | |
802 | void *hdr; | |
803 | struct nlattr *attrs; | |
804 | struct nlattr *prop; | |
1da46568 YX |
805 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
806 | struct tipc_link *bcl = tn->bcl; | |
7be57fc6 RA |
807 | |
808 | if (!bcl) | |
809 | return 0; | |
810 | ||
1da46568 | 811 | tipc_bclink_lock(net); |
7be57fc6 | 812 | |
bfb3e5dd | 813 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
7be57fc6 RA |
814 | NLM_F_MULTI, TIPC_NL_LINK_GET); |
815 | if (!hdr) | |
816 | return -EMSGSIZE; | |
817 | ||
818 | attrs = nla_nest_start(msg->skb, TIPC_NLA_LINK); | |
819 | if (!attrs) | |
820 | goto msg_full; | |
821 | ||
822 | /* The broadcast link is always up */ | |
823 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP)) | |
824 | goto attr_msg_full; | |
825 | ||
826 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_BROADCAST)) | |
827 | goto attr_msg_full; | |
828 | if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, bcl->name)) | |
829 | goto attr_msg_full; | |
830 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, bcl->next_in_no)) | |
831 | goto attr_msg_full; | |
832 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, bcl->next_out_no)) | |
833 | goto attr_msg_full; | |
834 | ||
835 | prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP); | |
836 | if (!prop) | |
837 | goto attr_msg_full; | |
838 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->queue_limit[0])) | |
839 | goto prop_msg_full; | |
840 | nla_nest_end(msg->skb, prop); | |
841 | ||
842 | err = __tipc_nl_add_bc_link_stat(msg->skb, &bcl->stats); | |
843 | if (err) | |
844 | goto attr_msg_full; | |
845 | ||
1da46568 | 846 | tipc_bclink_unlock(net); |
7be57fc6 RA |
847 | nla_nest_end(msg->skb, attrs); |
848 | genlmsg_end(msg->skb, hdr); | |
849 | ||
850 | return 0; | |
851 | ||
852 | prop_msg_full: | |
853 | nla_nest_cancel(msg->skb, prop); | |
854 | attr_msg_full: | |
855 | nla_nest_cancel(msg->skb, attrs); | |
856 | msg_full: | |
1da46568 | 857 | tipc_bclink_unlock(net); |
7be57fc6 RA |
858 | genlmsg_cancel(msg->skb, hdr); |
859 | ||
860 | return -EMSGSIZE; | |
861 | } | |
b97bf3fd | 862 | |
1da46568 | 863 | int tipc_bclink_reset_stats(struct net *net) |
b97bf3fd | 864 | { |
1da46568 YX |
865 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
866 | struct tipc_link *bcl = tn->bcl; | |
867 | ||
b97bf3fd PL |
868 | if (!bcl) |
869 | return -ENOPROTOOPT; | |
870 | ||
1da46568 | 871 | tipc_bclink_lock(net); |
b97bf3fd | 872 | memset(&bcl->stats, 0, sizeof(bcl->stats)); |
1da46568 | 873 | tipc_bclink_unlock(net); |
0e35fd5e | 874 | return 0; |
b97bf3fd PL |
875 | } |
876 | ||
1da46568 | 877 | int tipc_bclink_set_queue_limits(struct net *net, u32 limit) |
b97bf3fd | 878 | { |
1da46568 YX |
879 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
880 | struct tipc_link *bcl = tn->bcl; | |
881 | ||
b97bf3fd PL |
882 | if (!bcl) |
883 | return -ENOPROTOOPT; | |
884 | if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN)) | |
885 | return -EINVAL; | |
886 | ||
1da46568 | 887 | tipc_bclink_lock(net); |
4323add6 | 888 | tipc_link_set_queue_limits(bcl, limit); |
1da46568 | 889 | tipc_bclink_unlock(net); |
0e35fd5e | 890 | return 0; |
b97bf3fd PL |
891 | } |
892 | ||
7f9f95d9 | 893 | int tipc_bclink_init(struct net *net) |
b97bf3fd | 894 | { |
7f9f95d9 | 895 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 YX |
896 | struct tipc_bcbearer *bcbearer; |
897 | struct tipc_bclink *bclink; | |
898 | struct tipc_link *bcl; | |
7f9f95d9 | 899 | |
eb8b00f5 YX |
900 | bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); |
901 | if (!bcbearer) | |
902 | return -ENOMEM; | |
903 | ||
904 | bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); | |
905 | if (!bclink) { | |
906 | kfree(bcbearer); | |
907 | return -ENOMEM; | |
908 | } | |
909 | ||
910 | bcl = &bclink->link; | |
b97bf3fd | 911 | bcbearer->bearer.media = &bcbearer->media; |
4323add6 | 912 | bcbearer->media.send_msg = tipc_bcbearer_send; |
2e2d9be8 | 913 | sprintf(bcbearer->media.name, "tipc-broadcast"); |
b97bf3fd | 914 | |
d69afc90 | 915 | spin_lock_init(&bclink->lock); |
58dc55f2 | 916 | __skb_queue_head_init(&bcl->outqueue); |
bc6fecd4 | 917 | __skb_queue_head_init(&bcl->deferred_queue); |
c637c103 | 918 | skb_queue_head_init(&bcl->wakeupq); |
b97bf3fd | 919 | bcl->next_out_no = 1; |
34af946a | 920 | spin_lock_init(&bclink->node.lock); |
cb1b7280 JPM |
921 | __skb_queue_head_init(&bclink->arrvq); |
922 | skb_queue_head_init(&bclink->inputq); | |
b97bf3fd | 923 | bcl->owner = &bclink->node; |
1da46568 | 924 | bcl->owner->net = net; |
c4307285 | 925 | bcl->max_pkt = MAX_PKT_DEFAULT_MCAST; |
4323add6 | 926 | tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); |
7a2f7d18 | 927 | bcl->bearer_id = MAX_BEARERS; |
7f9f95d9 | 928 | rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcbearer->bearer); |
b97bf3fd | 929 | bcl->state = WORKING_WORKING; |
c5898636 JPM |
930 | bcl->pmsg = (struct tipc_msg *)&bcl->proto_msg; |
931 | msg_set_prevnode(bcl->pmsg, tn->own_addr); | |
4b704d59 | 932 | strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); |
1da46568 YX |
933 | tn->bcbearer = bcbearer; |
934 | tn->bclink = bclink; | |
935 | tn->bcl = bcl; | |
eb8b00f5 | 936 | return 0; |
b97bf3fd PL |
937 | } |
938 | ||
7f9f95d9 | 939 | void tipc_bclink_stop(struct net *net) |
b97bf3fd | 940 | { |
7f9f95d9 YX |
941 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
942 | ||
1da46568 YX |
943 | tipc_bclink_lock(net); |
944 | tipc_link_purge_queues(tn->bcl); | |
945 | tipc_bclink_unlock(net); | |
c47e9b91 | 946 | |
7f9f95d9 | 947 | RCU_INIT_POINTER(tn->bearer_list[BCBEARER], NULL); |
eb8b00f5 | 948 | synchronize_net(); |
1da46568 YX |
949 | kfree(tn->bcbearer); |
950 | kfree(tn->bclink); | |
b97bf3fd PL |
951 | } |
952 | ||
3e22e62b AS |
953 | /** |
954 | * tipc_nmap_add - add a node to a node map | |
955 | */ | |
28dd9418 | 956 | static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node) |
3e22e62b AS |
957 | { |
958 | int n = tipc_node(node); | |
959 | int w = n / WSIZE; | |
960 | u32 mask = (1 << (n % WSIZE)); | |
961 | ||
962 | if ((nm_ptr->map[w] & mask) == 0) { | |
963 | nm_ptr->count++; | |
964 | nm_ptr->map[w] |= mask; | |
965 | } | |
966 | } | |
967 | ||
968 | /** | |
969 | * tipc_nmap_remove - remove a node from a node map | |
970 | */ | |
28dd9418 | 971 | static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node) |
3e22e62b AS |
972 | { |
973 | int n = tipc_node(node); | |
974 | int w = n / WSIZE; | |
975 | u32 mask = (1 << (n % WSIZE)); | |
976 | ||
977 | if ((nm_ptr->map[w] & mask) != 0) { | |
978 | nm_ptr->map[w] &= ~mask; | |
979 | nm_ptr->count--; | |
980 | } | |
981 | } | |
982 | ||
983 | /** | |
984 | * tipc_nmap_diff - find differences between node maps | |
985 | * @nm_a: input node map A | |
986 | * @nm_b: input node map B | |
987 | * @nm_diff: output node map A-B (i.e. nodes of A that are not in B) | |
988 | */ | |
31e3c3f6 | 989 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
990 | struct tipc_node_map *nm_b, | |
991 | struct tipc_node_map *nm_diff) | |
3e22e62b AS |
992 | { |
993 | int stop = ARRAY_SIZE(nm_a->map); | |
994 | int w; | |
995 | int b; | |
996 | u32 map; | |
997 | ||
998 | memset(nm_diff, 0, sizeof(*nm_diff)); | |
999 | for (w = 0; w < stop; w++) { | |
1000 | map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]); | |
1001 | nm_diff->map[w] = map; | |
1002 | if (map != 0) { | |
1003 | for (b = 0 ; b < WSIZE; b++) { | |
1004 | if (map & (1 << b)) | |
1005 | nm_diff->count++; | |
1006 | } | |
1007 | } | |
1008 | } | |
1009 | } |