Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/bcast.c: TIPC broadcast code | |
c4307285 | 3 | * |
4c94cc2d | 4 | * Copyright (c) 2004-2006, 2014-2017, 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 | ||
6beb19a6 | 38 | #include <linux/tipc_config.h> |
078bec82 JPM |
39 | #include "socket.h" |
40 | #include "msg.h" | |
b97bf3fd | 41 | #include "bcast.h" |
6beb19a6 | 42 | #include "link.h" |
2ae0b8af | 43 | #include "name_table.h" |
b97bf3fd | 44 | |
4c94cc2d JM |
45 | #define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */ |
46 | #define BCLINK_WIN_MIN 32 /* bcast minimum link window size */ | |
b97bf3fd | 47 | |
3aec9cc9 | 48 | const char tipc_bclink_name[] = "broadcast-link"; |
b97bf3fd | 49 | |
6beb19a6 | 50 | /** |
2af5ae37 | 51 | * struct tipc_bc_base - base structure for keeping broadcast send state |
b06b281e | 52 | * @link: broadcast send link structure |
2af5ae37 | 53 | * @inputq: data input queue; will only carry SOCK_WAKEUP messages |
9cc1bf39 | 54 | * @dests: array keeping number of reachable destinations per bearer |
2af5ae37 | 55 | * @primary_bearer: a bearer having links to all broadcast destinations, if any |
9999974a | 56 | * @bcast_support: indicates if primary bearer, if any, supports broadcast |
02ec6caf | 57 | * @force_bcast: forces broadcast for multicast traffic |
01fd12bb | 58 | * @rcast_support: indicates if all peer nodes support replicast |
02ec6caf | 59 | * @force_rcast: forces replicast for multicast traffic |
01fd12bb | 60 | * @rc_ratio: dest count as percentage of cluster size where send method changes |
9cc1bf39 | 61 | * @bc_threshold: calculated from rc_ratio; if dests > threshold use broadcast |
6beb19a6 JPM |
62 | */ |
63 | struct tipc_bc_base { | |
32301906 | 64 | struct tipc_link *link; |
6beb19a6 | 65 | struct sk_buff_head inputq; |
b06b281e JPM |
66 | int dests[MAX_BEARERS]; |
67 | int primary_bearer; | |
9999974a | 68 | bool bcast_support; |
02ec6caf | 69 | bool force_bcast; |
01fd12bb | 70 | bool rcast_support; |
02ec6caf | 71 | bool force_rcast; |
01fd12bb JPM |
72 | int rc_ratio; |
73 | int bc_threshold; | |
6beb19a6 JPM |
74 | }; |
75 | ||
5fd9fd63 JPM |
76 | static struct tipc_bc_base *tipc_bc_base(struct net *net) |
77 | { | |
78 | return tipc_net(net)->bcbase; | |
79 | } | |
80 | ||
4c94cc2d JM |
81 | /* tipc_bcast_get_mtu(): -get the MTU currently used by broadcast link |
82 | * Note: the MTU is decremented to give room for a tunnel header, in | |
83 | * case the message needs to be sent as replicast | |
84 | */ | |
959e1781 | 85 | int tipc_bcast_get_mtu(struct net *net) |
078bec82 | 86 | { |
a853e4c6 | 87 | return tipc_link_mtu(tipc_bc_sndlink(net)) - INT_H_SIZE; |
078bec82 JPM |
88 | } |
89 | ||
01fd12bb JPM |
90 | void tipc_bcast_disable_rcast(struct net *net) |
91 | { | |
92 | tipc_bc_base(net)->rcast_support = false; | |
93 | } | |
94 | ||
95 | static void tipc_bcbase_calc_bc_threshold(struct net *net) | |
96 | { | |
97 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
98 | int cluster_size = tipc_link_bc_peers(tipc_bc_sndlink(net)); | |
99 | ||
100 | bb->bc_threshold = 1 + (cluster_size * bb->rc_ratio / 100); | |
101 | } | |
102 | ||
b06b281e JPM |
103 | /* tipc_bcbase_select_primary(): find a bearer with links to all destinations, |
104 | * if any, and make it primary bearer | |
105 | */ | |
106 | static void tipc_bcbase_select_primary(struct net *net) | |
107 | { | |
108 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
109 | int all_dests = tipc_link_bc_peers(bb->link); | |
9999974a | 110 | int i, mtu, prim; |
b06b281e JPM |
111 | |
112 | bb->primary_bearer = INVALID_BEARER_ID; | |
9999974a | 113 | bb->bcast_support = true; |
b06b281e JPM |
114 | |
115 | if (!all_dests) | |
116 | return; | |
117 | ||
118 | for (i = 0; i < MAX_BEARERS; i++) { | |
959e1781 JPM |
119 | if (!bb->dests[i]) |
120 | continue; | |
121 | ||
122 | mtu = tipc_bearer_mtu(net, i); | |
123 | if (mtu < tipc_link_mtu(bb->link)) | |
124 | tipc_link_set_mtu(bb->link, mtu); | |
9999974a | 125 | bb->bcast_support &= tipc_bearer_bcast_support(net, i); |
b06b281e JPM |
126 | if (bb->dests[i] < all_dests) |
127 | continue; | |
128 | ||
129 | bb->primary_bearer = i; | |
130 | ||
131 | /* Reduce risk that all nodes select same primary */ | |
132 | if ((i ^ tipc_own_addr(net)) & 1) | |
133 | break; | |
134 | } | |
9999974a JPM |
135 | prim = bb->primary_bearer; |
136 | if (prim != INVALID_BEARER_ID) | |
137 | bb->bcast_support = tipc_bearer_bcast_support(net, prim); | |
b06b281e JPM |
138 | } |
139 | ||
140 | void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id) | |
141 | { | |
142 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
143 | ||
144 | tipc_bcast_lock(net); | |
145 | bb->dests[bearer_id]++; | |
146 | tipc_bcbase_select_primary(net); | |
147 | tipc_bcast_unlock(net); | |
148 | } | |
149 | ||
150 | void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id) | |
151 | { | |
152 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
153 | ||
154 | tipc_bcast_lock(net); | |
155 | bb->dests[bearer_id]--; | |
156 | tipc_bcbase_select_primary(net); | |
157 | tipc_bcast_unlock(net); | |
158 | } | |
159 | ||
b06b281e JPM |
160 | /* tipc_bcbase_xmit - broadcast a packet queue across one or more bearers |
161 | * | |
162 | * Note that number of reachable destinations, as indicated in the dests[] | |
163 | * array, may transitionally differ from the number of destinations indicated | |
164 | * in each sent buffer. We can sustain this. Excess destination nodes will | |
165 | * drop and never acknowledge the unexpected packets, and missing destinations | |
166 | * will either require retransmission (if they are just about to be added to | |
167 | * the bearer), or be removed from the buffer's 'ackers' counter (if they | |
168 | * just went down) | |
169 | */ | |
170 | static void tipc_bcbase_xmit(struct net *net, struct sk_buff_head *xmitq) | |
171 | { | |
172 | int bearer_id; | |
173 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
174 | struct sk_buff *skb, *_skb; | |
175 | struct sk_buff_head _xmitq; | |
176 | ||
177 | if (skb_queue_empty(xmitq)) | |
178 | return; | |
179 | ||
180 | /* The typical case: at least one bearer has links to all nodes */ | |
181 | bearer_id = bb->primary_bearer; | |
182 | if (bearer_id >= 0) { | |
183 | tipc_bearer_bc_xmit(net, bearer_id, xmitq); | |
184 | return; | |
185 | } | |
186 | ||
187 | /* We have to transmit across all bearers */ | |
188 | skb_queue_head_init(&_xmitq); | |
189 | for (bearer_id = 0; bearer_id < MAX_BEARERS; bearer_id++) { | |
190 | if (!bb->dests[bearer_id]) | |
191 | continue; | |
192 | ||
193 | skb_queue_walk(xmitq, skb) { | |
194 | _skb = pskb_copy_for_clone(skb, GFP_ATOMIC); | |
195 | if (!_skb) | |
196 | break; | |
197 | __skb_queue_tail(&_xmitq, _skb); | |
198 | } | |
199 | tipc_bearer_bc_xmit(net, bearer_id, &_xmitq); | |
200 | } | |
201 | __skb_queue_purge(xmitq); | |
202 | __skb_queue_purge(&_xmitq); | |
203 | } | |
204 | ||
01fd12bb JPM |
205 | static void tipc_bcast_select_xmit_method(struct net *net, int dests, |
206 | struct tipc_mc_method *method) | |
207 | { | |
208 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
209 | unsigned long exp = method->expires; | |
210 | ||
211 | /* Broadcast supported by used bearer/bearers? */ | |
212 | if (!bb->bcast_support) { | |
213 | method->rcast = true; | |
214 | return; | |
215 | } | |
216 | /* Any destinations which don't support replicast ? */ | |
217 | if (!bb->rcast_support) { | |
218 | method->rcast = false; | |
219 | return; | |
220 | } | |
221 | /* Can current method be changed ? */ | |
222 | method->expires = jiffies + TIPC_METHOD_EXPIRE; | |
c55c8eda | 223 | if (method->mandatory) |
01fd12bb JPM |
224 | return; |
225 | ||
c55c8eda HL |
226 | if (!(tipc_net(net)->capabilities & TIPC_MCAST_RBCTL) && |
227 | time_before(jiffies, exp)) | |
228 | return; | |
229 | ||
230 | /* Configuration as force 'broadcast' method */ | |
231 | if (bb->force_bcast) { | |
232 | method->rcast = false; | |
233 | return; | |
234 | } | |
235 | /* Configuration as force 'replicast' method */ | |
236 | if (bb->force_rcast) { | |
237 | method->rcast = true; | |
238 | return; | |
239 | } | |
240 | /* Configuration as 'autoselect' or default method */ | |
01fd12bb JPM |
241 | /* Determine method to use now */ |
242 | method->rcast = dests <= bb->bc_threshold; | |
243 | } | |
244 | ||
a853e4c6 | 245 | /* tipc_bcast_xmit - broadcast the buffer chain to all external nodes |
f2f9800d | 246 | * @net: the applicable net namespace |
a853e4c6 JPM |
247 | * @pkts: chain of buffers containing message |
248 | * @cong_link_cnt: set to 1 if broadcast link is congested, otherwise 0 | |
365ad353 | 249 | * Consumes the buffer chain. |
a853e4c6 | 250 | * Returns 0 if success, otherwise errno: -EHOSTUNREACH,-EMSGSIZE |
078bec82 | 251 | */ |
a853e4c6 JPM |
252 | static int tipc_bcast_xmit(struct net *net, struct sk_buff_head *pkts, |
253 | u16 *cong_link_cnt) | |
078bec82 | 254 | { |
2f566124 | 255 | struct tipc_link *l = tipc_bc_sndlink(net); |
a853e4c6 | 256 | struct sk_buff_head xmitq; |
078bec82 | 257 | int rc = 0; |
078bec82 | 258 | |
3382605f | 259 | skb_queue_head_init(&xmitq); |
2f566124 JPM |
260 | tipc_bcast_lock(net); |
261 | if (tipc_link_bc_peers(l)) | |
a853e4c6 | 262 | rc = tipc_link_xmit(l, pkts, &xmitq); |
2f566124 | 263 | tipc_bcast_unlock(net); |
a853e4c6 JPM |
264 | tipc_bcbase_xmit(net, &xmitq); |
265 | __skb_queue_purge(pkts); | |
266 | if (rc == -ELINKCONG) { | |
267 | *cong_link_cnt = 1; | |
268 | rc = 0; | |
269 | } | |
270 | return rc; | |
271 | } | |
272 | ||
273 | /* tipc_rcast_xmit - replicate and send a message to given destination nodes | |
274 | * @net: the applicable net namespace | |
275 | * @pkts: chain of buffers containing message | |
276 | * @dests: list of destination nodes | |
277 | * @cong_link_cnt: returns number of congested links | |
278 | * @cong_links: returns identities of congested links | |
279 | * Returns 0 if success, otherwise errno | |
280 | */ | |
281 | static int tipc_rcast_xmit(struct net *net, struct sk_buff_head *pkts, | |
282 | struct tipc_nlist *dests, u16 *cong_link_cnt) | |
283 | { | |
a80ae530 | 284 | struct tipc_dest *dst, *tmp; |
a853e4c6 | 285 | struct sk_buff_head _pkts; |
a80ae530 | 286 | u32 dnode, selector; |
a853e4c6 JPM |
287 | |
288 | selector = msg_link_selector(buf_msg(skb_peek(pkts))); | |
3382605f | 289 | skb_queue_head_init(&_pkts); |
a853e4c6 | 290 | |
a80ae530 JM |
291 | list_for_each_entry_safe(dst, tmp, &dests->list, list) { |
292 | dnode = dst->node; | |
293 | if (!tipc_msg_pskb_copy(dnode, pkts, &_pkts)) | |
a853e4c6 | 294 | return -ENOMEM; |
078bec82 | 295 | |
a853e4c6 | 296 | /* Any other return value than -ELINKCONG is ignored */ |
a80ae530 | 297 | if (tipc_node_xmit(net, &_pkts, dnode, selector) == -ELINKCONG) |
a853e4c6 | 298 | (*cong_link_cnt)++; |
cb1b7280 | 299 | } |
a853e4c6 JPM |
300 | return 0; |
301 | } | |
52666986 | 302 | |
c55c8eda HL |
303 | /* tipc_mcast_send_sync - deliver a dummy message with SYN bit |
304 | * @net: the applicable net namespace | |
305 | * @skb: socket buffer to copy | |
306 | * @method: send method to be used | |
307 | * @dests: destination nodes for message. | |
308 | * @cong_link_cnt: returns number of encountered congested destination links | |
309 | * Returns 0 if success, otherwise errno | |
310 | */ | |
311 | static int tipc_mcast_send_sync(struct net *net, struct sk_buff *skb, | |
312 | struct tipc_mc_method *method, | |
313 | struct tipc_nlist *dests, | |
314 | u16 *cong_link_cnt) | |
315 | { | |
316 | struct tipc_msg *hdr, *_hdr; | |
317 | struct sk_buff_head tmpq; | |
318 | struct sk_buff *_skb; | |
319 | ||
320 | /* Is a cluster supporting with new capabilities ? */ | |
321 | if (!(tipc_net(net)->capabilities & TIPC_MCAST_RBCTL)) | |
322 | return 0; | |
323 | ||
324 | hdr = buf_msg(skb); | |
325 | if (msg_user(hdr) == MSG_FRAGMENTER) | |
a7dc51ad | 326 | hdr = msg_inner_hdr(hdr); |
c55c8eda HL |
327 | if (msg_type(hdr) != TIPC_MCAST_MSG) |
328 | return 0; | |
329 | ||
330 | /* Allocate dummy message */ | |
331 | _skb = tipc_buf_acquire(MCAST_H_SIZE, GFP_KERNEL); | |
6da88a82 | 332 | if (!_skb) |
c55c8eda HL |
333 | return -ENOMEM; |
334 | ||
335 | /* Preparing for 'synching' header */ | |
336 | msg_set_syn(hdr, 1); | |
337 | ||
338 | /* Copy skb's header into a dummy header */ | |
339 | skb_copy_to_linear_data(_skb, hdr, MCAST_H_SIZE); | |
340 | skb_orphan(_skb); | |
341 | ||
342 | /* Reverse method for dummy message */ | |
343 | _hdr = buf_msg(_skb); | |
344 | msg_set_size(_hdr, MCAST_H_SIZE); | |
345 | msg_set_is_rcast(_hdr, !msg_is_rcast(hdr)); | |
346 | ||
347 | skb_queue_head_init(&tmpq); | |
348 | __skb_queue_tail(&tmpq, _skb); | |
349 | if (method->rcast) | |
350 | tipc_bcast_xmit(net, &tmpq, cong_link_cnt); | |
351 | else | |
352 | tipc_rcast_xmit(net, &tmpq, dests, cong_link_cnt); | |
353 | ||
354 | /* This queue should normally be empty by now */ | |
355 | __skb_queue_purge(&tmpq); | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
a853e4c6 JPM |
360 | /* tipc_mcast_xmit - deliver message to indicated destination nodes |
361 | * and to identified node local sockets | |
362 | * @net: the applicable net namespace | |
363 | * @pkts: chain of buffers containing message | |
01fd12bb JPM |
364 | * @method: send method to be used |
365 | * @dests: destination nodes for message. | |
a853e4c6 | 366 | * @cong_link_cnt: returns number of encountered congested destination links |
a853e4c6 JPM |
367 | * Consumes buffer chain. |
368 | * Returns 0 if success, otherwise errno | |
369 | */ | |
370 | int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts, | |
01fd12bb JPM |
371 | struct tipc_mc_method *method, struct tipc_nlist *dests, |
372 | u16 *cong_link_cnt) | |
a853e4c6 | 373 | { |
a853e4c6 | 374 | struct sk_buff_head inputq, localq; |
c55c8eda HL |
375 | bool rcast = method->rcast; |
376 | struct tipc_msg *hdr; | |
377 | struct sk_buff *skb; | |
a853e4c6 JPM |
378 | int rc = 0; |
379 | ||
380 | skb_queue_head_init(&inputq); | |
381 | skb_queue_head_init(&localq); | |
382 | ||
383 | /* Clone packets before they are consumed by next call */ | |
384 | if (dests->local && !tipc_msg_reassemble(pkts, &localq)) { | |
385 | rc = -ENOMEM; | |
386 | goto exit; | |
387 | } | |
01fd12bb | 388 | /* Send according to determined transmit method */ |
a853e4c6 | 389 | if (dests->remote) { |
01fd12bb | 390 | tipc_bcast_select_xmit_method(net, dests->remote, method); |
c55c8eda HL |
391 | |
392 | skb = skb_peek(pkts); | |
393 | hdr = buf_msg(skb); | |
394 | if (msg_user(hdr) == MSG_FRAGMENTER) | |
a7dc51ad | 395 | hdr = msg_inner_hdr(hdr); |
c55c8eda HL |
396 | msg_set_is_rcast(hdr, method->rcast); |
397 | ||
398 | /* Switch method ? */ | |
399 | if (rcast != method->rcast) | |
400 | tipc_mcast_send_sync(net, skb, method, | |
401 | dests, cong_link_cnt); | |
402 | ||
01fd12bb | 403 | if (method->rcast) |
a853e4c6 JPM |
404 | rc = tipc_rcast_xmit(net, pkts, dests, cong_link_cnt); |
405 | else | |
406 | rc = tipc_bcast_xmit(net, pkts, cong_link_cnt); | |
407 | } | |
408 | ||
409 | if (dests->local) | |
410 | tipc_sk_mcast_rcv(net, &localq, &inputq); | |
411 | exit: | |
01fd12bb | 412 | /* This queue should normally be empty by now */ |
a853e4c6 | 413 | __skb_queue_purge(pkts); |
365ad353 | 414 | return rc; |
078bec82 | 415 | } |
52666986 JPM |
416 | |
417 | /* tipc_bcast_rcv - receive a broadcast packet, and deliver to rcv link | |
418 | * | |
419 | * RCU is locked, no other locks set | |
420 | */ | |
421 | int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb) | |
422 | { | |
423 | struct tipc_msg *hdr = buf_msg(skb); | |
424 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; | |
425 | struct sk_buff_head xmitq; | |
426 | int rc; | |
427 | ||
428 | __skb_queue_head_init(&xmitq); | |
429 | ||
430 | if (msg_mc_netid(hdr) != tipc_netid(net) || !tipc_link_is_up(l)) { | |
431 | kfree_skb(skb); | |
432 | return 0; | |
433 | } | |
434 | ||
435 | tipc_bcast_lock(net); | |
436 | if (msg_user(hdr) == BCAST_PROTOCOL) | |
437 | rc = tipc_link_bc_nack_rcv(l, skb, &xmitq); | |
438 | else | |
439 | rc = tipc_link_rcv(l, skb, NULL); | |
440 | tipc_bcast_unlock(net); | |
441 | ||
b06b281e | 442 | tipc_bcbase_xmit(net, &xmitq); |
52666986 JPM |
443 | |
444 | /* Any socket wakeup messages ? */ | |
445 | if (!skb_queue_empty(inputq)) | |
446 | tipc_sk_rcv(net, inputq); | |
447 | ||
448 | return rc; | |
449 | } | |
450 | ||
451 | /* tipc_bcast_ack_rcv - receive and handle a broadcast acknowledge | |
452 | * | |
453 | * RCU is locked, no other locks set | |
454 | */ | |
06bd2b1e JPM |
455 | void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, |
456 | struct tipc_msg *hdr) | |
52666986 JPM |
457 | { |
458 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; | |
06bd2b1e | 459 | u16 acked = msg_bcast_ack(hdr); |
52666986 JPM |
460 | struct sk_buff_head xmitq; |
461 | ||
06bd2b1e JPM |
462 | /* Ignore bc acks sent by peer before bcast synch point was received */ |
463 | if (msg_bc_ack_invalid(hdr)) | |
464 | return; | |
465 | ||
52666986 JPM |
466 | __skb_queue_head_init(&xmitq); |
467 | ||
468 | tipc_bcast_lock(net); | |
469 | tipc_link_bc_ack_rcv(l, acked, &xmitq); | |
470 | tipc_bcast_unlock(net); | |
471 | ||
b06b281e | 472 | tipc_bcbase_xmit(net, &xmitq); |
52666986 JPM |
473 | |
474 | /* Any socket wakeup messages ? */ | |
475 | if (!skb_queue_empty(inputq)) | |
476 | tipc_sk_rcv(net, inputq); | |
477 | } | |
478 | ||
479 | /* tipc_bcast_synch_rcv - check and update rcv link with peer's send state | |
480 | * | |
481 | * RCU is locked, no other locks set | |
482 | */ | |
02d11ca2 JPM |
483 | int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l, |
484 | struct tipc_msg *hdr) | |
52666986 JPM |
485 | { |
486 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; | |
487 | struct sk_buff_head xmitq; | |
02d11ca2 | 488 | int rc = 0; |
52666986 JPM |
489 | |
490 | __skb_queue_head_init(&xmitq); | |
491 | ||
492 | tipc_bcast_lock(net); | |
06bd2b1e JPM |
493 | if (msg_type(hdr) != STATE_MSG) { |
494 | tipc_link_bc_init_rcv(l, hdr); | |
495 | } else if (!msg_bc_ack_invalid(hdr)) { | |
52666986 | 496 | tipc_link_bc_ack_rcv(l, msg_bcast_ack(hdr), &xmitq); |
02d11ca2 | 497 | rc = tipc_link_bc_sync_rcv(l, hdr, &xmitq); |
52666986 JPM |
498 | } |
499 | tipc_bcast_unlock(net); | |
500 | ||
b06b281e | 501 | tipc_bcbase_xmit(net, &xmitq); |
52666986 JPM |
502 | |
503 | /* Any socket wakeup messages ? */ | |
504 | if (!skb_queue_empty(inputq)) | |
505 | tipc_sk_rcv(net, inputq); | |
02d11ca2 | 506 | return rc; |
52666986 JPM |
507 | } |
508 | ||
509 | /* tipc_bcast_add_peer - add a peer node to broadcast link and bearer | |
510 | * | |
511 | * RCU is locked, node lock is set | |
512 | */ | |
b06b281e | 513 | void tipc_bcast_add_peer(struct net *net, struct tipc_link *uc_l, |
52666986 JPM |
514 | struct sk_buff_head *xmitq) |
515 | { | |
52666986 JPM |
516 | struct tipc_link *snd_l = tipc_bc_sndlink(net); |
517 | ||
b06b281e | 518 | tipc_bcast_lock(net); |
52666986 | 519 | tipc_link_add_bc_peer(snd_l, uc_l, xmitq); |
b06b281e | 520 | tipc_bcbase_select_primary(net); |
01fd12bb | 521 | tipc_bcbase_calc_bc_threshold(net); |
b06b281e | 522 | tipc_bcast_unlock(net); |
52666986 JPM |
523 | } |
524 | ||
525 | /* tipc_bcast_remove_peer - remove a peer node from broadcast link and bearer | |
526 | * | |
527 | * RCU is locked, node lock is set | |
528 | */ | |
b06b281e | 529 | void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_l) |
52666986 | 530 | { |
52666986 | 531 | struct tipc_link *snd_l = tipc_bc_sndlink(net); |
b06b281e | 532 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
52666986 JPM |
533 | struct sk_buff_head xmitq; |
534 | ||
535 | __skb_queue_head_init(&xmitq); | |
536 | ||
b06b281e | 537 | tipc_bcast_lock(net); |
52666986 | 538 | tipc_link_remove_bc_peer(snd_l, rcv_l, &xmitq); |
b06b281e | 539 | tipc_bcbase_select_primary(net); |
01fd12bb | 540 | tipc_bcbase_calc_bc_threshold(net); |
b06b281e | 541 | tipc_bcast_unlock(net); |
52666986 | 542 | |
b06b281e | 543 | tipc_bcbase_xmit(net, &xmitq); |
52666986 JPM |
544 | |
545 | /* Any socket wakeup messages ? */ | |
546 | if (!skb_queue_empty(inputq)) | |
547 | tipc_sk_rcv(net, inputq); | |
548 | } | |
549 | ||
1da46568 | 550 | int tipc_bclink_reset_stats(struct net *net) |
b97bf3fd | 551 | { |
38206d59 | 552 | struct tipc_link *l = tipc_bc_sndlink(net); |
1da46568 | 553 | |
38206d59 | 554 | if (!l) |
b97bf3fd PL |
555 | return -ENOPROTOOPT; |
556 | ||
2af5ae37 | 557 | tipc_bcast_lock(net); |
38206d59 | 558 | tipc_link_reset_stats(l); |
2af5ae37 | 559 | tipc_bcast_unlock(net); |
0e35fd5e | 560 | return 0; |
b97bf3fd PL |
561 | } |
562 | ||
2af5ae37 | 563 | static int tipc_bc_link_set_queue_limits(struct net *net, u32 limit) |
b97bf3fd | 564 | { |
2af5ae37 | 565 | struct tipc_link *l = tipc_bc_sndlink(net); |
1da46568 | 566 | |
2af5ae37 | 567 | if (!l) |
b97bf3fd | 568 | return -ENOPROTOOPT; |
53387c4e JPM |
569 | if (limit < BCLINK_WIN_MIN) |
570 | limit = BCLINK_WIN_MIN; | |
571 | if (limit > TIPC_MAX_LINK_WIN) | |
b97bf3fd | 572 | return -EINVAL; |
2af5ae37 JPM |
573 | tipc_bcast_lock(net); |
574 | tipc_link_set_queue_limits(l, limit); | |
575 | tipc_bcast_unlock(net); | |
0e35fd5e | 576 | return 0; |
b97bf3fd PL |
577 | } |
578 | ||
02ec6caf HL |
579 | static int tipc_bc_link_set_broadcast_mode(struct net *net, u32 bc_mode) |
580 | { | |
581 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
582 | ||
583 | switch (bc_mode) { | |
584 | case BCLINK_MODE_BCAST: | |
585 | if (!bb->bcast_support) | |
586 | return -ENOPROTOOPT; | |
587 | ||
588 | bb->force_bcast = true; | |
589 | bb->force_rcast = false; | |
590 | break; | |
591 | case BCLINK_MODE_RCAST: | |
592 | if (!bb->rcast_support) | |
593 | return -ENOPROTOOPT; | |
594 | ||
595 | bb->force_bcast = false; | |
596 | bb->force_rcast = true; | |
597 | break; | |
598 | case BCLINK_MODE_SEL: | |
599 | if (!bb->bcast_support || !bb->rcast_support) | |
600 | return -ENOPROTOOPT; | |
601 | ||
602 | bb->force_bcast = false; | |
603 | bb->force_rcast = false; | |
604 | break; | |
605 | default: | |
606 | return -EINVAL; | |
607 | } | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | static int tipc_bc_link_set_broadcast_ratio(struct net *net, u32 bc_ratio) | |
613 | { | |
614 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
615 | ||
616 | if (!bb->bcast_support || !bb->rcast_support) | |
617 | return -ENOPROTOOPT; | |
618 | ||
619 | if (bc_ratio > 100 || bc_ratio <= 0) | |
620 | return -EINVAL; | |
621 | ||
622 | bb->rc_ratio = bc_ratio; | |
623 | tipc_bcast_lock(net); | |
624 | tipc_bcbase_calc_bc_threshold(net); | |
625 | tipc_bcast_unlock(net); | |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
670f4f88 RA |
630 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]) |
631 | { | |
632 | int err; | |
633 | u32 win; | |
02ec6caf HL |
634 | u32 bc_mode; |
635 | u32 bc_ratio; | |
670f4f88 RA |
636 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; |
637 | ||
638 | if (!attrs[TIPC_NLA_LINK_PROP]) | |
639 | return -EINVAL; | |
640 | ||
641 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props); | |
642 | if (err) | |
643 | return err; | |
644 | ||
02ec6caf HL |
645 | if (!props[TIPC_NLA_PROP_WIN] && |
646 | !props[TIPC_NLA_PROP_BROADCAST] && | |
647 | !props[TIPC_NLA_PROP_BROADCAST_RATIO]) { | |
670f4f88 | 648 | return -EOPNOTSUPP; |
02ec6caf HL |
649 | } |
650 | ||
651 | if (props[TIPC_NLA_PROP_BROADCAST]) { | |
652 | bc_mode = nla_get_u32(props[TIPC_NLA_PROP_BROADCAST]); | |
653 | err = tipc_bc_link_set_broadcast_mode(net, bc_mode); | |
654 | } | |
670f4f88 | 655 | |
02ec6caf HL |
656 | if (!err && props[TIPC_NLA_PROP_BROADCAST_RATIO]) { |
657 | bc_ratio = nla_get_u32(props[TIPC_NLA_PROP_BROADCAST_RATIO]); | |
658 | err = tipc_bc_link_set_broadcast_ratio(net, bc_ratio); | |
659 | } | |
670f4f88 | 660 | |
02ec6caf HL |
661 | if (!err && props[TIPC_NLA_PROP_WIN]) { |
662 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
663 | err = tipc_bc_link_set_queue_limits(net, win); | |
664 | } | |
665 | ||
666 | return err; | |
670f4f88 RA |
667 | } |
668 | ||
6beb19a6 | 669 | int tipc_bcast_init(struct net *net) |
b97bf3fd | 670 | { |
32301906 | 671 | struct tipc_net *tn = tipc_net(net); |
32301906 JPM |
672 | struct tipc_bc_base *bb = NULL; |
673 | struct tipc_link *l = NULL; | |
674 | ||
a0732548 | 675 | bb = kzalloc(sizeof(*bb), GFP_KERNEL); |
32301906 JPM |
676 | if (!bb) |
677 | goto enomem; | |
678 | tn->bcbase = bb; | |
0043550b | 679 | spin_lock_init(&tipc_net(net)->bclock); |
32301906 | 680 | |
c72fa872 | 681 | if (!tipc_link_bc_create(net, 0, 0, |
4c94cc2d | 682 | FB_MTU, |
32301906 | 683 | BCLINK_WIN_DEFAULT, |
fd556f20 | 684 | 0, |
32301906 | 685 | &bb->inputq, |
2af5ae37 | 686 | NULL, |
52666986 | 687 | NULL, |
32301906 JPM |
688 | &l)) |
689 | goto enomem; | |
690 | bb->link = l; | |
691 | tn->bcl = l; | |
02ec6caf | 692 | bb->rc_ratio = 10; |
01fd12bb | 693 | bb->rcast_support = true; |
eb8b00f5 | 694 | return 0; |
32301906 | 695 | enomem: |
32301906 JPM |
696 | kfree(bb); |
697 | kfree(l); | |
698 | return -ENOMEM; | |
b97bf3fd PL |
699 | } |
700 | ||
6beb19a6 | 701 | void tipc_bcast_stop(struct net *net) |
b97bf3fd | 702 | { |
7f9f95d9 YX |
703 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
704 | ||
eb8b00f5 | 705 | synchronize_net(); |
6beb19a6 | 706 | kfree(tn->bcbase); |
32301906 | 707 | kfree(tn->bcl); |
b97bf3fd | 708 | } |
2ae0b8af JPM |
709 | |
710 | void tipc_nlist_init(struct tipc_nlist *nl, u32 self) | |
711 | { | |
712 | memset(nl, 0, sizeof(*nl)); | |
713 | INIT_LIST_HEAD(&nl->list); | |
714 | nl->self = self; | |
715 | } | |
716 | ||
717 | void tipc_nlist_add(struct tipc_nlist *nl, u32 node) | |
718 | { | |
719 | if (node == nl->self) | |
720 | nl->local = true; | |
a80ae530 | 721 | else if (tipc_dest_push(&nl->list, node, 0)) |
2ae0b8af JPM |
722 | nl->remote++; |
723 | } | |
724 | ||
725 | void tipc_nlist_del(struct tipc_nlist *nl, u32 node) | |
726 | { | |
727 | if (node == nl->self) | |
728 | nl->local = false; | |
a80ae530 | 729 | else if (tipc_dest_del(&nl->list, node, 0)) |
2ae0b8af JPM |
730 | nl->remote--; |
731 | } | |
732 | ||
733 | void tipc_nlist_purge(struct tipc_nlist *nl) | |
734 | { | |
a80ae530 | 735 | tipc_dest_list_purge(&nl->list); |
2ae0b8af | 736 | nl->remote = 0; |
c9efb15a | 737 | nl->local = false; |
2ae0b8af | 738 | } |
02ec6caf HL |
739 | |
740 | u32 tipc_bcast_get_broadcast_mode(struct net *net) | |
741 | { | |
742 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
743 | ||
744 | if (bb->force_bcast) | |
745 | return BCLINK_MODE_BCAST; | |
746 | ||
747 | if (bb->force_rcast) | |
748 | return BCLINK_MODE_RCAST; | |
749 | ||
750 | if (bb->bcast_support && bb->rcast_support) | |
751 | return BCLINK_MODE_SEL; | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
756 | u32 tipc_bcast_get_broadcast_ratio(struct net *net) | |
757 | { | |
758 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
759 | ||
760 | return bb->rc_ratio; | |
761 | } | |
c55c8eda | 762 | |
08e046c8 | 763 | void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq, |
c55c8eda HL |
764 | struct sk_buff_head *inputq) |
765 | { | |
766 | struct sk_buff *skb, *_skb, *tmp; | |
767 | struct tipc_msg *hdr, *_hdr; | |
768 | bool match = false; | |
769 | u32 node, port; | |
770 | ||
771 | skb = skb_peek(inputq); | |
e1279ff7 HL |
772 | if (!skb) |
773 | return; | |
774 | ||
c55c8eda HL |
775 | hdr = buf_msg(skb); |
776 | ||
777 | if (likely(!msg_is_syn(hdr) && skb_queue_empty(defq))) | |
778 | return; | |
779 | ||
780 | node = msg_orignode(hdr); | |
08e046c8 HL |
781 | if (node == tipc_own_addr(net)) |
782 | return; | |
783 | ||
c55c8eda HL |
784 | port = msg_origport(hdr); |
785 | ||
786 | /* Has the twin SYN message already arrived ? */ | |
787 | skb_queue_walk(defq, _skb) { | |
788 | _hdr = buf_msg(_skb); | |
789 | if (msg_orignode(_hdr) != node) | |
790 | continue; | |
791 | if (msg_origport(_hdr) != port) | |
792 | continue; | |
793 | match = true; | |
794 | break; | |
795 | } | |
796 | ||
797 | if (!match) { | |
798 | if (!msg_is_syn(hdr)) | |
799 | return; | |
800 | __skb_dequeue(inputq); | |
801 | __skb_queue_tail(defq, skb); | |
802 | return; | |
803 | } | |
804 | ||
805 | /* Deliver non-SYN message from other link, otherwise queue it */ | |
806 | if (!msg_is_syn(hdr)) { | |
807 | if (msg_is_rcast(hdr) != msg_is_rcast(_hdr)) | |
808 | return; | |
809 | __skb_dequeue(inputq); | |
810 | __skb_queue_tail(defq, skb); | |
811 | return; | |
812 | } | |
813 | ||
814 | /* Queue non-SYN/SYN message from same link */ | |
815 | if (msg_is_rcast(hdr) == msg_is_rcast(_hdr)) { | |
816 | __skb_dequeue(inputq); | |
817 | __skb_queue_tail(defq, skb); | |
818 | return; | |
819 | } | |
820 | ||
821 | /* Matching SYN messages => return the one with data, if any */ | |
822 | __skb_unlink(_skb, defq); | |
823 | if (msg_data_sz(hdr)) { | |
824 | kfree_skb(_skb); | |
825 | } else { | |
826 | __skb_dequeue(inputq); | |
827 | kfree_skb(skb); | |
828 | __skb_queue_tail(inputq, _skb); | |
829 | } | |
830 | ||
831 | /* Deliver subsequent non-SYN messages from same peer */ | |
832 | skb_queue_walk_safe(defq, _skb, tmp) { | |
833 | _hdr = buf_msg(_skb); | |
834 | if (msg_orignode(_hdr) != node) | |
835 | continue; | |
836 | if (msg_origport(_hdr) != port) | |
837 | continue; | |
838 | if (msg_is_syn(_hdr)) | |
839 | break; | |
840 | __skb_unlink(_skb, defq); | |
841 | __skb_queue_tail(inputq, _skb); | |
842 | } | |
843 | } |