Commit | Line | Data |
---|---|---|
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"; |
a91d55d1 | 49 | unsigned long sysctl_tipc_bc_retruni __read_mostly; |
b97bf3fd | 50 | |
6beb19a6 | 51 | /** |
2af5ae37 | 52 | * struct tipc_bc_base - base structure for keeping broadcast send state |
b06b281e | 53 | * @link: broadcast send link structure |
2af5ae37 | 54 | * @inputq: data input queue; will only carry SOCK_WAKEUP messages |
9cc1bf39 | 55 | * @dests: array keeping number of reachable destinations per bearer |
2af5ae37 | 56 | * @primary_bearer: a bearer having links to all broadcast destinations, if any |
9999974a | 57 | * @bcast_support: indicates if primary bearer, if any, supports broadcast |
02ec6caf | 58 | * @force_bcast: forces broadcast for multicast traffic |
01fd12bb | 59 | * @rcast_support: indicates if all peer nodes support replicast |
02ec6caf | 60 | * @force_rcast: forces replicast for multicast traffic |
01fd12bb | 61 | * @rc_ratio: dest count as percentage of cluster size where send method changes |
9cc1bf39 | 62 | * @bc_threshold: calculated from rc_ratio; if dests > threshold use broadcast |
6beb19a6 JPM |
63 | */ |
64 | struct tipc_bc_base { | |
32301906 | 65 | struct tipc_link *link; |
6beb19a6 | 66 | struct sk_buff_head inputq; |
b06b281e JPM |
67 | int dests[MAX_BEARERS]; |
68 | int primary_bearer; | |
9999974a | 69 | bool bcast_support; |
02ec6caf | 70 | bool force_bcast; |
01fd12bb | 71 | bool rcast_support; |
02ec6caf | 72 | bool force_rcast; |
01fd12bb JPM |
73 | int rc_ratio; |
74 | int bc_threshold; | |
6beb19a6 JPM |
75 | }; |
76 | ||
5fd9fd63 JPM |
77 | static struct tipc_bc_base *tipc_bc_base(struct net *net) |
78 | { | |
79 | return tipc_net(net)->bcbase; | |
80 | } | |
81 | ||
4c94cc2d JM |
82 | /* tipc_bcast_get_mtu(): -get the MTU currently used by broadcast link |
83 | * Note: the MTU is decremented to give room for a tunnel header, in | |
84 | * case the message needs to be sent as replicast | |
85 | */ | |
959e1781 | 86 | int tipc_bcast_get_mtu(struct net *net) |
078bec82 | 87 | { |
fc1b6d6d | 88 | return tipc_link_mss(tipc_bc_sndlink(net)); |
078bec82 JPM |
89 | } |
90 | ||
ba5f6a86 | 91 | void tipc_bcast_toggle_rcast(struct net *net, bool supp) |
01fd12bb | 92 | { |
ba5f6a86 | 93 | tipc_bc_base(net)->rcast_support = supp; |
01fd12bb JPM |
94 | } |
95 | ||
96 | static void tipc_bcbase_calc_bc_threshold(struct net *net) | |
97 | { | |
98 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
99 | int cluster_size = tipc_link_bc_peers(tipc_bc_sndlink(net)); | |
100 | ||
101 | bb->bc_threshold = 1 + (cluster_size * bb->rc_ratio / 100); | |
102 | } | |
103 | ||
b06b281e JPM |
104 | /* tipc_bcbase_select_primary(): find a bearer with links to all destinations, |
105 | * if any, and make it primary bearer | |
106 | */ | |
107 | static void tipc_bcbase_select_primary(struct net *net) | |
108 | { | |
109 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
110 | int all_dests = tipc_link_bc_peers(bb->link); | |
9999974a | 111 | int i, mtu, prim; |
b06b281e JPM |
112 | |
113 | bb->primary_bearer = INVALID_BEARER_ID; | |
9999974a | 114 | bb->bcast_support = true; |
b06b281e JPM |
115 | |
116 | if (!all_dests) | |
117 | return; | |
118 | ||
119 | for (i = 0; i < MAX_BEARERS; i++) { | |
959e1781 JPM |
120 | if (!bb->dests[i]) |
121 | continue; | |
122 | ||
123 | mtu = tipc_bearer_mtu(net, i); | |
124 | if (mtu < tipc_link_mtu(bb->link)) | |
125 | tipc_link_set_mtu(bb->link, mtu); | |
9999974a | 126 | bb->bcast_support &= tipc_bearer_bcast_support(net, i); |
b06b281e JPM |
127 | if (bb->dests[i] < all_dests) |
128 | continue; | |
129 | ||
130 | bb->primary_bearer = i; | |
131 | ||
132 | /* Reduce risk that all nodes select same primary */ | |
133 | if ((i ^ tipc_own_addr(net)) & 1) | |
134 | break; | |
135 | } | |
9999974a JPM |
136 | prim = bb->primary_bearer; |
137 | if (prim != INVALID_BEARER_ID) | |
138 | bb->bcast_support = tipc_bearer_bcast_support(net, prim); | |
b06b281e JPM |
139 | } |
140 | ||
141 | void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id) | |
142 | { | |
143 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
144 | ||
145 | tipc_bcast_lock(net); | |
146 | bb->dests[bearer_id]++; | |
147 | tipc_bcbase_select_primary(net); | |
148 | tipc_bcast_unlock(net); | |
149 | } | |
150 | ||
151 | void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id) | |
152 | { | |
153 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
154 | ||
155 | tipc_bcast_lock(net); | |
156 | bb->dests[bearer_id]--; | |
157 | tipc_bcbase_select_primary(net); | |
158 | tipc_bcast_unlock(net); | |
159 | } | |
160 | ||
b06b281e JPM |
161 | /* tipc_bcbase_xmit - broadcast a packet queue across one or more bearers |
162 | * | |
163 | * Note that number of reachable destinations, as indicated in the dests[] | |
164 | * array, may transitionally differ from the number of destinations indicated | |
165 | * in each sent buffer. We can sustain this. Excess destination nodes will | |
166 | * drop and never acknowledge the unexpected packets, and missing destinations | |
167 | * will either require retransmission (if they are just about to be added to | |
168 | * the bearer), or be removed from the buffer's 'ackers' counter (if they | |
169 | * just went down) | |
170 | */ | |
171 | static void tipc_bcbase_xmit(struct net *net, struct sk_buff_head *xmitq) | |
172 | { | |
173 | int bearer_id; | |
174 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
175 | struct sk_buff *skb, *_skb; | |
176 | struct sk_buff_head _xmitq; | |
177 | ||
178 | if (skb_queue_empty(xmitq)) | |
179 | return; | |
180 | ||
181 | /* The typical case: at least one bearer has links to all nodes */ | |
182 | bearer_id = bb->primary_bearer; | |
183 | if (bearer_id >= 0) { | |
184 | tipc_bearer_bc_xmit(net, bearer_id, xmitq); | |
185 | return; | |
186 | } | |
187 | ||
188 | /* We have to transmit across all bearers */ | |
e654f9f5 | 189 | __skb_queue_head_init(&_xmitq); |
b06b281e JPM |
190 | for (bearer_id = 0; bearer_id < MAX_BEARERS; bearer_id++) { |
191 | if (!bb->dests[bearer_id]) | |
192 | continue; | |
193 | ||
194 | skb_queue_walk(xmitq, skb) { | |
195 | _skb = pskb_copy_for_clone(skb, GFP_ATOMIC); | |
196 | if (!_skb) | |
197 | break; | |
198 | __skb_queue_tail(&_xmitq, _skb); | |
199 | } | |
200 | tipc_bearer_bc_xmit(net, bearer_id, &_xmitq); | |
201 | } | |
202 | __skb_queue_purge(xmitq); | |
203 | __skb_queue_purge(&_xmitq); | |
204 | } | |
205 | ||
01fd12bb JPM |
206 | static void tipc_bcast_select_xmit_method(struct net *net, int dests, |
207 | struct tipc_mc_method *method) | |
208 | { | |
209 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
210 | unsigned long exp = method->expires; | |
211 | ||
212 | /* Broadcast supported by used bearer/bearers? */ | |
213 | if (!bb->bcast_support) { | |
214 | method->rcast = true; | |
215 | return; | |
216 | } | |
217 | /* Any destinations which don't support replicast ? */ | |
218 | if (!bb->rcast_support) { | |
219 | method->rcast = false; | |
220 | return; | |
221 | } | |
222 | /* Can current method be changed ? */ | |
223 | method->expires = jiffies + TIPC_METHOD_EXPIRE; | |
c55c8eda | 224 | if (method->mandatory) |
01fd12bb JPM |
225 | return; |
226 | ||
c55c8eda HL |
227 | if (!(tipc_net(net)->capabilities & TIPC_MCAST_RBCTL) && |
228 | time_before(jiffies, exp)) | |
229 | return; | |
230 | ||
231 | /* Configuration as force 'broadcast' method */ | |
232 | if (bb->force_bcast) { | |
233 | method->rcast = false; | |
234 | return; | |
235 | } | |
236 | /* Configuration as force 'replicast' method */ | |
237 | if (bb->force_rcast) { | |
238 | method->rcast = true; | |
239 | return; | |
240 | } | |
241 | /* Configuration as 'autoselect' or default method */ | |
01fd12bb JPM |
242 | /* Determine method to use now */ |
243 | method->rcast = dests <= bb->bc_threshold; | |
244 | } | |
245 | ||
a853e4c6 | 246 | /* tipc_bcast_xmit - broadcast the buffer chain to all external nodes |
f2f9800d | 247 | * @net: the applicable net namespace |
a853e4c6 JPM |
248 | * @pkts: chain of buffers containing message |
249 | * @cong_link_cnt: set to 1 if broadcast link is congested, otherwise 0 | |
365ad353 | 250 | * Consumes the buffer chain. |
a853e4c6 | 251 | * Returns 0 if success, otherwise errno: -EHOSTUNREACH,-EMSGSIZE |
078bec82 | 252 | */ |
cad2929d HHL |
253 | int tipc_bcast_xmit(struct net *net, struct sk_buff_head *pkts, |
254 | u16 *cong_link_cnt) | |
078bec82 | 255 | { |
2f566124 | 256 | struct tipc_link *l = tipc_bc_sndlink(net); |
a853e4c6 | 257 | struct sk_buff_head xmitq; |
078bec82 | 258 | int rc = 0; |
078bec82 | 259 | |
e654f9f5 | 260 | __skb_queue_head_init(&xmitq); |
2f566124 JPM |
261 | tipc_bcast_lock(net); |
262 | if (tipc_link_bc_peers(l)) | |
a853e4c6 | 263 | rc = tipc_link_xmit(l, pkts, &xmitq); |
2f566124 | 264 | tipc_bcast_unlock(net); |
a853e4c6 JPM |
265 | tipc_bcbase_xmit(net, &xmitq); |
266 | __skb_queue_purge(pkts); | |
267 | if (rc == -ELINKCONG) { | |
268 | *cong_link_cnt = 1; | |
269 | rc = 0; | |
270 | } | |
271 | return rc; | |
272 | } | |
273 | ||
274 | /* tipc_rcast_xmit - replicate and send a message to given destination nodes | |
275 | * @net: the applicable net namespace | |
276 | * @pkts: chain of buffers containing message | |
277 | * @dests: list of destination nodes | |
278 | * @cong_link_cnt: returns number of congested links | |
279 | * @cong_links: returns identities of congested links | |
280 | * Returns 0 if success, otherwise errno | |
281 | */ | |
282 | static int tipc_rcast_xmit(struct net *net, struct sk_buff_head *pkts, | |
283 | struct tipc_nlist *dests, u16 *cong_link_cnt) | |
284 | { | |
a80ae530 | 285 | struct tipc_dest *dst, *tmp; |
a853e4c6 | 286 | struct sk_buff_head _pkts; |
a80ae530 | 287 | u32 dnode, selector; |
a853e4c6 JPM |
288 | |
289 | selector = msg_link_selector(buf_msg(skb_peek(pkts))); | |
e654f9f5 | 290 | __skb_queue_head_init(&_pkts); |
a853e4c6 | 291 | |
a80ae530 JM |
292 | list_for_each_entry_safe(dst, tmp, &dests->list, list) { |
293 | dnode = dst->node; | |
294 | if (!tipc_msg_pskb_copy(dnode, pkts, &_pkts)) | |
a853e4c6 | 295 | return -ENOMEM; |
078bec82 | 296 | |
a853e4c6 | 297 | /* Any other return value than -ELINKCONG is ignored */ |
a80ae530 | 298 | if (tipc_node_xmit(net, &_pkts, dnode, selector) == -ELINKCONG) |
a853e4c6 | 299 | (*cong_link_cnt)++; |
cb1b7280 | 300 | } |
a853e4c6 JPM |
301 | return 0; |
302 | } | |
52666986 | 303 | |
c55c8eda HL |
304 | /* tipc_mcast_send_sync - deliver a dummy message with SYN bit |
305 | * @net: the applicable net namespace | |
306 | * @skb: socket buffer to copy | |
307 | * @method: send method to be used | |
308 | * @dests: destination nodes for message. | |
c55c8eda HL |
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, | |
dca4a17d | 313 | struct tipc_nlist *dests) |
c55c8eda HL |
314 | { |
315 | struct tipc_msg *hdr, *_hdr; | |
316 | struct sk_buff_head tmpq; | |
317 | struct sk_buff *_skb; | |
dca4a17d TL |
318 | u16 cong_link_cnt; |
319 | int rc = 0; | |
c55c8eda HL |
320 | |
321 | /* Is a cluster supporting with new capabilities ? */ | |
322 | if (!(tipc_net(net)->capabilities & TIPC_MCAST_RBCTL)) | |
323 | return 0; | |
324 | ||
325 | hdr = buf_msg(skb); | |
326 | if (msg_user(hdr) == MSG_FRAGMENTER) | |
a7dc51ad | 327 | hdr = msg_inner_hdr(hdr); |
c55c8eda HL |
328 | if (msg_type(hdr) != TIPC_MCAST_MSG) |
329 | return 0; | |
330 | ||
331 | /* Allocate dummy message */ | |
332 | _skb = tipc_buf_acquire(MCAST_H_SIZE, GFP_KERNEL); | |
6da88a82 | 333 | if (!_skb) |
c55c8eda HL |
334 | return -ENOMEM; |
335 | ||
336 | /* Preparing for 'synching' header */ | |
337 | msg_set_syn(hdr, 1); | |
338 | ||
339 | /* Copy skb's header into a dummy header */ | |
340 | skb_copy_to_linear_data(_skb, hdr, MCAST_H_SIZE); | |
341 | skb_orphan(_skb); | |
342 | ||
343 | /* Reverse method for dummy message */ | |
344 | _hdr = buf_msg(_skb); | |
345 | msg_set_size(_hdr, MCAST_H_SIZE); | |
346 | msg_set_is_rcast(_hdr, !msg_is_rcast(hdr)); | |
dca4a17d | 347 | msg_set_errcode(_hdr, TIPC_ERR_NO_PORT); |
c55c8eda | 348 | |
e654f9f5 | 349 | __skb_queue_head_init(&tmpq); |
c55c8eda HL |
350 | __skb_queue_tail(&tmpq, _skb); |
351 | if (method->rcast) | |
dca4a17d | 352 | rc = tipc_bcast_xmit(net, &tmpq, &cong_link_cnt); |
c55c8eda | 353 | else |
dca4a17d | 354 | rc = tipc_rcast_xmit(net, &tmpq, dests, &cong_link_cnt); |
c55c8eda HL |
355 | |
356 | /* This queue should normally be empty by now */ | |
357 | __skb_queue_purge(&tmpq); | |
358 | ||
dca4a17d | 359 | return rc; |
c55c8eda HL |
360 | } |
361 | ||
a853e4c6 JPM |
362 | /* tipc_mcast_xmit - deliver message to indicated destination nodes |
363 | * and to identified node local sockets | |
364 | * @net: the applicable net namespace | |
365 | * @pkts: chain of buffers containing message | |
01fd12bb JPM |
366 | * @method: send method to be used |
367 | * @dests: destination nodes for message. | |
a853e4c6 | 368 | * @cong_link_cnt: returns number of encountered congested destination links |
a853e4c6 JPM |
369 | * Consumes buffer chain. |
370 | * Returns 0 if success, otherwise errno | |
371 | */ | |
372 | int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts, | |
01fd12bb JPM |
373 | struct tipc_mc_method *method, struct tipc_nlist *dests, |
374 | u16 *cong_link_cnt) | |
a853e4c6 | 375 | { |
a853e4c6 | 376 | struct sk_buff_head inputq, localq; |
c55c8eda HL |
377 | bool rcast = method->rcast; |
378 | struct tipc_msg *hdr; | |
379 | struct sk_buff *skb; | |
a853e4c6 JPM |
380 | int rc = 0; |
381 | ||
382 | skb_queue_head_init(&inputq); | |
e654f9f5 | 383 | __skb_queue_head_init(&localq); |
a853e4c6 JPM |
384 | |
385 | /* Clone packets before they are consumed by next call */ | |
386 | if (dests->local && !tipc_msg_reassemble(pkts, &localq)) { | |
387 | rc = -ENOMEM; | |
388 | goto exit; | |
389 | } | |
01fd12bb | 390 | /* Send according to determined transmit method */ |
a853e4c6 | 391 | if (dests->remote) { |
01fd12bb | 392 | tipc_bcast_select_xmit_method(net, dests->remote, method); |
c55c8eda HL |
393 | |
394 | skb = skb_peek(pkts); | |
395 | hdr = buf_msg(skb); | |
396 | if (msg_user(hdr) == MSG_FRAGMENTER) | |
a7dc51ad | 397 | hdr = msg_inner_hdr(hdr); |
c55c8eda HL |
398 | msg_set_is_rcast(hdr, method->rcast); |
399 | ||
400 | /* Switch method ? */ | |
dca4a17d TL |
401 | if (rcast != method->rcast) { |
402 | rc = tipc_mcast_send_sync(net, skb, method, dests); | |
403 | if (unlikely(rc)) { | |
404 | pr_err("Unable to send SYN: method %d, rc %d\n", | |
405 | rcast, rc); | |
406 | goto exit; | |
407 | } | |
408 | } | |
c55c8eda | 409 | |
01fd12bb | 410 | if (method->rcast) |
a853e4c6 JPM |
411 | rc = tipc_rcast_xmit(net, pkts, dests, cong_link_cnt); |
412 | else | |
413 | rc = tipc_bcast_xmit(net, pkts, cong_link_cnt); | |
414 | } | |
415 | ||
6c9081a3 JR |
416 | if (dests->local) { |
417 | tipc_loopback_trace(net, &localq); | |
a853e4c6 | 418 | tipc_sk_mcast_rcv(net, &localq, &inputq); |
6c9081a3 | 419 | } |
a853e4c6 | 420 | exit: |
01fd12bb | 421 | /* This queue should normally be empty by now */ |
a853e4c6 | 422 | __skb_queue_purge(pkts); |
365ad353 | 423 | return rc; |
078bec82 | 424 | } |
52666986 JPM |
425 | |
426 | /* tipc_bcast_rcv - receive a broadcast packet, and deliver to rcv link | |
427 | * | |
428 | * RCU is locked, no other locks set | |
429 | */ | |
430 | int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb) | |
431 | { | |
432 | struct tipc_msg *hdr = buf_msg(skb); | |
433 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; | |
434 | struct sk_buff_head xmitq; | |
435 | int rc; | |
436 | ||
437 | __skb_queue_head_init(&xmitq); | |
438 | ||
439 | if (msg_mc_netid(hdr) != tipc_netid(net) || !tipc_link_is_up(l)) { | |
440 | kfree_skb(skb); | |
441 | return 0; | |
442 | } | |
443 | ||
444 | tipc_bcast_lock(net); | |
445 | if (msg_user(hdr) == BCAST_PROTOCOL) | |
446 | rc = tipc_link_bc_nack_rcv(l, skb, &xmitq); | |
447 | else | |
448 | rc = tipc_link_rcv(l, skb, NULL); | |
449 | tipc_bcast_unlock(net); | |
450 | ||
b06b281e | 451 | tipc_bcbase_xmit(net, &xmitq); |
52666986 JPM |
452 | |
453 | /* Any socket wakeup messages ? */ | |
454 | if (!skb_queue_empty(inputq)) | |
455 | tipc_sk_rcv(net, inputq); | |
456 | ||
457 | return rc; | |
458 | } | |
459 | ||
460 | /* tipc_bcast_ack_rcv - receive and handle a broadcast acknowledge | |
461 | * | |
462 | * RCU is locked, no other locks set | |
463 | */ | |
06bd2b1e JPM |
464 | void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, |
465 | struct tipc_msg *hdr) | |
52666986 JPM |
466 | { |
467 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; | |
06bd2b1e | 468 | u16 acked = msg_bcast_ack(hdr); |
52666986 JPM |
469 | struct sk_buff_head xmitq; |
470 | ||
06bd2b1e JPM |
471 | /* Ignore bc acks sent by peer before bcast synch point was received */ |
472 | if (msg_bc_ack_invalid(hdr)) | |
473 | return; | |
474 | ||
52666986 JPM |
475 | __skb_queue_head_init(&xmitq); |
476 | ||
477 | tipc_bcast_lock(net); | |
a91d55d1 | 478 | tipc_link_bc_ack_rcv(l, acked, 0, NULL, &xmitq, NULL); |
52666986 JPM |
479 | tipc_bcast_unlock(net); |
480 | ||
b06b281e | 481 | tipc_bcbase_xmit(net, &xmitq); |
52666986 JPM |
482 | |
483 | /* Any socket wakeup messages ? */ | |
484 | if (!skb_queue_empty(inputq)) | |
485 | tipc_sk_rcv(net, inputq); | |
486 | } | |
487 | ||
488 | /* tipc_bcast_synch_rcv - check and update rcv link with peer's send state | |
489 | * | |
490 | * RCU is locked, no other locks set | |
491 | */ | |
02d11ca2 | 492 | int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l, |
a91d55d1 TL |
493 | struct tipc_msg *hdr, |
494 | struct sk_buff_head *retrq) | |
52666986 JPM |
495 | { |
496 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; | |
d7626b5a | 497 | struct tipc_gap_ack_blks *ga; |
52666986 | 498 | struct sk_buff_head xmitq; |
02d11ca2 | 499 | int rc = 0; |
52666986 JPM |
500 | |
501 | __skb_queue_head_init(&xmitq); | |
502 | ||
503 | tipc_bcast_lock(net); | |
06bd2b1e JPM |
504 | if (msg_type(hdr) != STATE_MSG) { |
505 | tipc_link_bc_init_rcv(l, hdr); | |
506 | } else if (!msg_bc_ack_invalid(hdr)) { | |
d7626b5a | 507 | tipc_get_gap_ack_blks(&ga, l, hdr, false); |
a91d55d1 TL |
508 | if (!sysctl_tipc_bc_retruni) |
509 | retrq = &xmitq; | |
d7626b5a | 510 | rc = tipc_link_bc_ack_rcv(l, msg_bcast_ack(hdr), |
a91d55d1 TL |
511 | msg_bc_gap(hdr), ga, &xmitq, |
512 | retrq); | |
d7626b5a | 513 | rc |= tipc_link_bc_sync_rcv(l, hdr, &xmitq); |
52666986 JPM |
514 | } |
515 | tipc_bcast_unlock(net); | |
516 | ||
b06b281e | 517 | tipc_bcbase_xmit(net, &xmitq); |
52666986 JPM |
518 | |
519 | /* Any socket wakeup messages ? */ | |
520 | if (!skb_queue_empty(inputq)) | |
521 | tipc_sk_rcv(net, inputq); | |
02d11ca2 | 522 | return rc; |
52666986 JPM |
523 | } |
524 | ||
525 | /* tipc_bcast_add_peer - add a peer node to broadcast link and bearer | |
526 | * | |
527 | * RCU is locked, node lock is set | |
528 | */ | |
b06b281e | 529 | void tipc_bcast_add_peer(struct net *net, struct tipc_link *uc_l, |
52666986 JPM |
530 | struct sk_buff_head *xmitq) |
531 | { | |
52666986 JPM |
532 | struct tipc_link *snd_l = tipc_bc_sndlink(net); |
533 | ||
b06b281e | 534 | tipc_bcast_lock(net); |
52666986 | 535 | tipc_link_add_bc_peer(snd_l, uc_l, xmitq); |
b06b281e | 536 | tipc_bcbase_select_primary(net); |
01fd12bb | 537 | tipc_bcbase_calc_bc_threshold(net); |
b06b281e | 538 | tipc_bcast_unlock(net); |
52666986 JPM |
539 | } |
540 | ||
541 | /* tipc_bcast_remove_peer - remove a peer node from broadcast link and bearer | |
542 | * | |
543 | * RCU is locked, node lock is set | |
544 | */ | |
b06b281e | 545 | void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_l) |
52666986 | 546 | { |
52666986 | 547 | struct tipc_link *snd_l = tipc_bc_sndlink(net); |
b06b281e | 548 | struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq; |
52666986 JPM |
549 | struct sk_buff_head xmitq; |
550 | ||
551 | __skb_queue_head_init(&xmitq); | |
552 | ||
b06b281e | 553 | tipc_bcast_lock(net); |
52666986 | 554 | tipc_link_remove_bc_peer(snd_l, rcv_l, &xmitq); |
b06b281e | 555 | tipc_bcbase_select_primary(net); |
01fd12bb | 556 | tipc_bcbase_calc_bc_threshold(net); |
b06b281e | 557 | tipc_bcast_unlock(net); |
52666986 | 558 | |
b06b281e | 559 | tipc_bcbase_xmit(net, &xmitq); |
52666986 JPM |
560 | |
561 | /* Any socket wakeup messages ? */ | |
562 | if (!skb_queue_empty(inputq)) | |
563 | tipc_sk_rcv(net, inputq); | |
564 | } | |
565 | ||
03b6fefd | 566 | int tipc_bclink_reset_stats(struct net *net, struct tipc_link *l) |
b97bf3fd | 567 | { |
38206d59 | 568 | if (!l) |
b97bf3fd PL |
569 | return -ENOPROTOOPT; |
570 | ||
2af5ae37 | 571 | tipc_bcast_lock(net); |
38206d59 | 572 | tipc_link_reset_stats(l); |
2af5ae37 | 573 | tipc_bcast_unlock(net); |
0e35fd5e | 574 | return 0; |
b97bf3fd PL |
575 | } |
576 | ||
16ad3f40 | 577 | static int tipc_bc_link_set_queue_limits(struct net *net, u32 max_win) |
b97bf3fd | 578 | { |
2af5ae37 | 579 | struct tipc_link *l = tipc_bc_sndlink(net); |
1da46568 | 580 | |
2af5ae37 | 581 | if (!l) |
b97bf3fd | 582 | return -ENOPROTOOPT; |
16ad3f40 JM |
583 | if (max_win < BCLINK_WIN_MIN) |
584 | max_win = BCLINK_WIN_MIN; | |
585 | if (max_win > TIPC_MAX_LINK_WIN) | |
b97bf3fd | 586 | return -EINVAL; |
2af5ae37 | 587 | tipc_bcast_lock(net); |
16ad3f40 | 588 | tipc_link_set_queue_limits(l, BCLINK_WIN_MIN, max_win); |
2af5ae37 | 589 | tipc_bcast_unlock(net); |
0e35fd5e | 590 | return 0; |
b97bf3fd PL |
591 | } |
592 | ||
02ec6caf HL |
593 | static int tipc_bc_link_set_broadcast_mode(struct net *net, u32 bc_mode) |
594 | { | |
595 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
596 | ||
597 | switch (bc_mode) { | |
598 | case BCLINK_MODE_BCAST: | |
599 | if (!bb->bcast_support) | |
600 | return -ENOPROTOOPT; | |
601 | ||
602 | bb->force_bcast = true; | |
603 | bb->force_rcast = false; | |
604 | break; | |
605 | case BCLINK_MODE_RCAST: | |
606 | if (!bb->rcast_support) | |
607 | return -ENOPROTOOPT; | |
608 | ||
609 | bb->force_bcast = false; | |
610 | bb->force_rcast = true; | |
611 | break; | |
612 | case BCLINK_MODE_SEL: | |
613 | if (!bb->bcast_support || !bb->rcast_support) | |
614 | return -ENOPROTOOPT; | |
615 | ||
616 | bb->force_bcast = false; | |
617 | bb->force_rcast = false; | |
618 | break; | |
619 | default: | |
620 | return -EINVAL; | |
621 | } | |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
626 | static int tipc_bc_link_set_broadcast_ratio(struct net *net, u32 bc_ratio) | |
627 | { | |
628 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
629 | ||
630 | if (!bb->bcast_support || !bb->rcast_support) | |
631 | return -ENOPROTOOPT; | |
632 | ||
633 | if (bc_ratio > 100 || bc_ratio <= 0) | |
634 | return -EINVAL; | |
635 | ||
636 | bb->rc_ratio = bc_ratio; | |
637 | tipc_bcast_lock(net); | |
638 | tipc_bcbase_calc_bc_threshold(net); | |
639 | tipc_bcast_unlock(net); | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
670f4f88 RA |
644 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]) |
645 | { | |
646 | int err; | |
647 | u32 win; | |
02ec6caf HL |
648 | u32 bc_mode; |
649 | u32 bc_ratio; | |
670f4f88 RA |
650 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; |
651 | ||
652 | if (!attrs[TIPC_NLA_LINK_PROP]) | |
653 | return -EINVAL; | |
654 | ||
655 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props); | |
656 | if (err) | |
657 | return err; | |
658 | ||
02ec6caf HL |
659 | if (!props[TIPC_NLA_PROP_WIN] && |
660 | !props[TIPC_NLA_PROP_BROADCAST] && | |
661 | !props[TIPC_NLA_PROP_BROADCAST_RATIO]) { | |
670f4f88 | 662 | return -EOPNOTSUPP; |
02ec6caf HL |
663 | } |
664 | ||
665 | if (props[TIPC_NLA_PROP_BROADCAST]) { | |
666 | bc_mode = nla_get_u32(props[TIPC_NLA_PROP_BROADCAST]); | |
667 | err = tipc_bc_link_set_broadcast_mode(net, bc_mode); | |
668 | } | |
670f4f88 | 669 | |
02ec6caf HL |
670 | if (!err && props[TIPC_NLA_PROP_BROADCAST_RATIO]) { |
671 | bc_ratio = nla_get_u32(props[TIPC_NLA_PROP_BROADCAST_RATIO]); | |
672 | err = tipc_bc_link_set_broadcast_ratio(net, bc_ratio); | |
673 | } | |
670f4f88 | 674 | |
02ec6caf HL |
675 | if (!err && props[TIPC_NLA_PROP_WIN]) { |
676 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
677 | err = tipc_bc_link_set_queue_limits(net, win); | |
678 | } | |
679 | ||
680 | return err; | |
670f4f88 RA |
681 | } |
682 | ||
6beb19a6 | 683 | int tipc_bcast_init(struct net *net) |
b97bf3fd | 684 | { |
32301906 | 685 | struct tipc_net *tn = tipc_net(net); |
32301906 JPM |
686 | struct tipc_bc_base *bb = NULL; |
687 | struct tipc_link *l = NULL; | |
688 | ||
a0732548 | 689 | bb = kzalloc(sizeof(*bb), GFP_KERNEL); |
32301906 JPM |
690 | if (!bb) |
691 | goto enomem; | |
692 | tn->bcbase = bb; | |
0043550b | 693 | spin_lock_init(&tipc_net(net)->bclock); |
32301906 | 694 | |
03b6fefd | 695 | if (!tipc_link_bc_create(net, 0, 0, NULL, |
4c94cc2d | 696 | FB_MTU, |
32301906 | 697 | BCLINK_WIN_DEFAULT, |
16ad3f40 | 698 | BCLINK_WIN_DEFAULT, |
fd556f20 | 699 | 0, |
32301906 | 700 | &bb->inputq, |
2af5ae37 | 701 | NULL, |
52666986 | 702 | NULL, |
32301906 JPM |
703 | &l)) |
704 | goto enomem; | |
705 | bb->link = l; | |
706 | tn->bcl = l; | |
02ec6caf | 707 | bb->rc_ratio = 10; |
01fd12bb | 708 | bb->rcast_support = true; |
eb8b00f5 | 709 | return 0; |
32301906 | 710 | enomem: |
32301906 JPM |
711 | kfree(bb); |
712 | kfree(l); | |
713 | return -ENOMEM; | |
b97bf3fd PL |
714 | } |
715 | ||
6beb19a6 | 716 | void tipc_bcast_stop(struct net *net) |
b97bf3fd | 717 | { |
7f9f95d9 YX |
718 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
719 | ||
eb8b00f5 | 720 | synchronize_net(); |
6beb19a6 | 721 | kfree(tn->bcbase); |
32301906 | 722 | kfree(tn->bcl); |
b97bf3fd | 723 | } |
2ae0b8af JPM |
724 | |
725 | void tipc_nlist_init(struct tipc_nlist *nl, u32 self) | |
726 | { | |
727 | memset(nl, 0, sizeof(*nl)); | |
728 | INIT_LIST_HEAD(&nl->list); | |
729 | nl->self = self; | |
730 | } | |
731 | ||
732 | void tipc_nlist_add(struct tipc_nlist *nl, u32 node) | |
733 | { | |
734 | if (node == nl->self) | |
735 | nl->local = true; | |
a80ae530 | 736 | else if (tipc_dest_push(&nl->list, node, 0)) |
2ae0b8af JPM |
737 | nl->remote++; |
738 | } | |
739 | ||
740 | void tipc_nlist_del(struct tipc_nlist *nl, u32 node) | |
741 | { | |
742 | if (node == nl->self) | |
743 | nl->local = false; | |
a80ae530 | 744 | else if (tipc_dest_del(&nl->list, node, 0)) |
2ae0b8af JPM |
745 | nl->remote--; |
746 | } | |
747 | ||
748 | void tipc_nlist_purge(struct tipc_nlist *nl) | |
749 | { | |
a80ae530 | 750 | tipc_dest_list_purge(&nl->list); |
2ae0b8af | 751 | nl->remote = 0; |
c9efb15a | 752 | nl->local = false; |
2ae0b8af | 753 | } |
02ec6caf | 754 | |
cad2929d | 755 | u32 tipc_bcast_get_mode(struct net *net) |
02ec6caf HL |
756 | { |
757 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
758 | ||
759 | if (bb->force_bcast) | |
760 | return BCLINK_MODE_BCAST; | |
761 | ||
762 | if (bb->force_rcast) | |
763 | return BCLINK_MODE_RCAST; | |
764 | ||
765 | if (bb->bcast_support && bb->rcast_support) | |
766 | return BCLINK_MODE_SEL; | |
767 | ||
768 | return 0; | |
769 | } | |
770 | ||
771 | u32 tipc_bcast_get_broadcast_ratio(struct net *net) | |
772 | { | |
773 | struct tipc_bc_base *bb = tipc_bc_base(net); | |
774 | ||
775 | return bb->rc_ratio; | |
776 | } | |
c55c8eda | 777 | |
08e046c8 | 778 | void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq, |
c55c8eda HL |
779 | struct sk_buff_head *inputq) |
780 | { | |
781 | struct sk_buff *skb, *_skb, *tmp; | |
782 | struct tipc_msg *hdr, *_hdr; | |
783 | bool match = false; | |
784 | u32 node, port; | |
785 | ||
786 | skb = skb_peek(inputq); | |
e1279ff7 HL |
787 | if (!skb) |
788 | return; | |
789 | ||
c55c8eda HL |
790 | hdr = buf_msg(skb); |
791 | ||
792 | if (likely(!msg_is_syn(hdr) && skb_queue_empty(defq))) | |
793 | return; | |
794 | ||
795 | node = msg_orignode(hdr); | |
08e046c8 HL |
796 | if (node == tipc_own_addr(net)) |
797 | return; | |
798 | ||
c55c8eda HL |
799 | port = msg_origport(hdr); |
800 | ||
801 | /* Has the twin SYN message already arrived ? */ | |
802 | skb_queue_walk(defq, _skb) { | |
803 | _hdr = buf_msg(_skb); | |
804 | if (msg_orignode(_hdr) != node) | |
805 | continue; | |
806 | if (msg_origport(_hdr) != port) | |
807 | continue; | |
808 | match = true; | |
809 | break; | |
810 | } | |
811 | ||
812 | if (!match) { | |
813 | if (!msg_is_syn(hdr)) | |
814 | return; | |
815 | __skb_dequeue(inputq); | |
816 | __skb_queue_tail(defq, skb); | |
817 | return; | |
818 | } | |
819 | ||
820 | /* Deliver non-SYN message from other link, otherwise queue it */ | |
821 | if (!msg_is_syn(hdr)) { | |
822 | if (msg_is_rcast(hdr) != msg_is_rcast(_hdr)) | |
823 | return; | |
824 | __skb_dequeue(inputq); | |
825 | __skb_queue_tail(defq, skb); | |
826 | return; | |
827 | } | |
828 | ||
829 | /* Queue non-SYN/SYN message from same link */ | |
830 | if (msg_is_rcast(hdr) == msg_is_rcast(_hdr)) { | |
831 | __skb_dequeue(inputq); | |
832 | __skb_queue_tail(defq, skb); | |
833 | return; | |
834 | } | |
835 | ||
836 | /* Matching SYN messages => return the one with data, if any */ | |
837 | __skb_unlink(_skb, defq); | |
838 | if (msg_data_sz(hdr)) { | |
839 | kfree_skb(_skb); | |
840 | } else { | |
841 | __skb_dequeue(inputq); | |
842 | kfree_skb(skb); | |
843 | __skb_queue_tail(inputq, _skb); | |
844 | } | |
845 | ||
846 | /* Deliver subsequent non-SYN messages from same peer */ | |
847 | skb_queue_walk_safe(defq, _skb, tmp) { | |
848 | _hdr = buf_msg(_skb); | |
849 | if (msg_orignode(_hdr) != node) | |
850 | continue; | |
851 | if (msg_origport(_hdr) != port) | |
852 | continue; | |
853 | if (msg_is_syn(_hdr)) | |
854 | break; | |
855 | __skb_unlink(_skb, defq); | |
856 | __skb_queue_tail(inputq, _skb); | |
857 | } | |
858 | } |