Commit | Line | Data |
---|---|---|
b97bf3fd PL |
1 | /* |
2 | * net/tipc/bcast.c: TIPC broadcast code | |
c4307285 | 3 | * |
3c724acd | 4 | * Copyright (c) 2004-2006, 2014-2015, Ericsson AB |
b97bf3fd | 5 | * Copyright (c) 2004, Intel Corporation. |
2d627b92 | 6 | * Copyright (c) 2005, 2010-2011, Wind River Systems |
b97bf3fd PL |
7 | * All rights reserved. |
8 | * | |
9ea1fd3c | 9 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
10 | * modification, are permitted provided that the following conditions are met: |
11 | * | |
9ea1fd3c PL |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the names of the copyright holders nor the names of its | |
18 | * contributors may be used to endorse or promote products derived from | |
19 | * this software without specific prior written permission. | |
b97bf3fd | 20 | * |
9ea1fd3c PL |
21 | * Alternatively, this software may be distributed under the terms of the |
22 | * GNU General Public License ("GPL") version 2 as published by the Free | |
23 | * Software Foundation. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ | |
37 | ||
078bec82 JPM |
38 | #include "socket.h" |
39 | #include "msg.h" | |
b97bf3fd | 40 | #include "bcast.h" |
9f6bdcd4 | 41 | #include "name_distr.h" |
1da46568 | 42 | #include "core.h" |
b97bf3fd | 43 | |
987b58be YX |
44 | #define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */ |
45 | #define BCLINK_WIN_DEFAULT 20 /* bcast link window size (default) */ | |
b97bf3fd | 46 | |
3aec9cc9 | 47 | const char tipc_bclink_name[] = "broadcast-link"; |
b97bf3fd | 48 | |
31e3c3f6 | 49 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
50 | struct tipc_node_map *nm_b, | |
51 | struct tipc_node_map *nm_diff); | |
28dd9418 YX |
52 | static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node); |
53 | static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node); | |
b97bf3fd | 54 | |
1da46568 | 55 | static void tipc_bclink_lock(struct net *net) |
d69afc90 | 56 | { |
1da46568 YX |
57 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
58 | ||
59 | spin_lock_bh(&tn->bclink->lock); | |
d69afc90 YX |
60 | } |
61 | ||
1da46568 | 62 | static void tipc_bclink_unlock(struct net *net) |
d69afc90 | 63 | { |
1da46568 | 64 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
3f5a12bd | 65 | |
1da46568 | 66 | spin_unlock_bh(&tn->bclink->lock); |
3f5a12bd YX |
67 | } |
68 | ||
cb1b7280 JPM |
69 | void tipc_bclink_input(struct net *net) |
70 | { | |
71 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
72 | ||
73 | tipc_sk_mcast_rcv(net, &tn->bclink->arrvq, &tn->bclink->inputq); | |
74 | } | |
75 | ||
078bec82 JPM |
76 | uint tipc_bclink_get_mtu(void) |
77 | { | |
78 | return MAX_PKT_DEFAULT_MCAST; | |
79 | } | |
80 | ||
05790c64 | 81 | static u32 bcbuf_acks(struct sk_buff *buf) |
b97bf3fd | 82 | { |
880b005f | 83 | return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle; |
b97bf3fd PL |
84 | } |
85 | ||
05790c64 | 86 | static void bcbuf_set_acks(struct sk_buff *buf, u32 acks) |
b97bf3fd | 87 | { |
880b005f | 88 | TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks; |
b97bf3fd PL |
89 | } |
90 | ||
05790c64 | 91 | static void bcbuf_decr_acks(struct sk_buff *buf) |
b97bf3fd PL |
92 | { |
93 | bcbuf_set_acks(buf, bcbuf_acks(buf) - 1); | |
94 | } | |
95 | ||
1da46568 | 96 | void tipc_bclink_add_node(struct net *net, u32 addr) |
cd3decdf | 97 | { |
1da46568 YX |
98 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
99 | ||
100 | tipc_bclink_lock(net); | |
101 | tipc_nmap_add(&tn->bclink->bcast_nodes, addr); | |
102 | tipc_bclink_unlock(net); | |
cd3decdf AS |
103 | } |
104 | ||
1da46568 | 105 | void tipc_bclink_remove_node(struct net *net, u32 addr) |
cd3decdf | 106 | { |
1da46568 YX |
107 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
108 | ||
109 | tipc_bclink_lock(net); | |
110 | tipc_nmap_remove(&tn->bclink->bcast_nodes, addr); | |
7d967b67 JPM |
111 | |
112 | /* Last node? => reset backlog queue */ | |
113 | if (!tn->bclink->bcast_nodes.count) | |
114 | tipc_link_purge_backlog(&tn->bclink->link); | |
115 | ||
1da46568 | 116 | tipc_bclink_unlock(net); |
cd3decdf | 117 | } |
b97bf3fd | 118 | |
1da46568 | 119 | static void bclink_set_last_sent(struct net *net) |
5b1f7bde | 120 | { |
1da46568 YX |
121 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
122 | struct tipc_link *bcl = tn->bcl; | |
123 | ||
dd3f9e70 | 124 | bcl->silent_intv_cnt = mod(bcl->snd_nxt - 1); |
5b1f7bde AS |
125 | } |
126 | ||
1da46568 | 127 | u32 tipc_bclink_get_last_sent(struct net *net) |
5b1f7bde | 128 | { |
1da46568 YX |
129 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
130 | ||
a97b9d3f | 131 | return tn->bcl->silent_intv_cnt; |
5b1f7bde AS |
132 | } |
133 | ||
7a54d4a9 | 134 | static void bclink_update_last_sent(struct tipc_node *node, u32 seqno) |
b97bf3fd | 135 | { |
7a54d4a9 AS |
136 | node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ? |
137 | seqno : node->bclink.last_sent; | |
b97bf3fd PL |
138 | } |
139 | ||
2c53040f | 140 | /** |
01d83edd AS |
141 | * tipc_bclink_retransmit_to - get most recent node to request retransmission |
142 | * | |
d69afc90 | 143 | * Called with bclink_lock locked |
01d83edd | 144 | */ |
1da46568 | 145 | struct tipc_node *tipc_bclink_retransmit_to(struct net *net) |
01d83edd | 146 | { |
1da46568 YX |
147 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
148 | ||
149 | return tn->bclink->retransmit_to; | |
01d83edd AS |
150 | } |
151 | ||
c4307285 | 152 | /** |
b97bf3fd PL |
153 | * bclink_retransmit_pkt - retransmit broadcast packets |
154 | * @after: sequence number of last packet to *not* retransmit | |
155 | * @to: sequence number of last packet to retransmit | |
c4307285 | 156 | * |
d69afc90 | 157 | * Called with bclink_lock locked |
b97bf3fd | 158 | */ |
1da46568 | 159 | static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to) |
b97bf3fd | 160 | { |
58dc55f2 | 161 | struct sk_buff *skb; |
1da46568 | 162 | struct tipc_link *bcl = tn->bcl; |
b97bf3fd | 163 | |
05dcc5aa | 164 | skb_queue_walk(&bcl->transmq, skb) { |
703068ee JM |
165 | if (more(buf_seqno(skb), after)) { |
166 | tipc_link_retransmit(bcl, skb, mod(to - after)); | |
58dc55f2 | 167 | break; |
703068ee | 168 | } |
58dc55f2 | 169 | } |
b97bf3fd PL |
170 | } |
171 | ||
7845989c KD |
172 | /** |
173 | * bclink_prepare_wakeup - prepare users for wakeup after congestion | |
174 | * @bcl: broadcast link | |
175 | * @resultq: queue for users which can be woken up | |
176 | * Move a number of waiting users, as permitted by available space in | |
177 | * the send queue, from link wait queue to specified queue for wakeup | |
178 | */ | |
179 | static void bclink_prepare_wakeup(struct tipc_link *bcl, struct sk_buff_head *resultq) | |
180 | { | |
181 | int pnd[TIPC_SYSTEM_IMPORTANCE + 1] = {0,}; | |
182 | int imp, lim; | |
183 | struct sk_buff *skb, *tmp; | |
184 | ||
185 | skb_queue_walk_safe(&bcl->wakeupq, skb, tmp) { | |
186 | imp = TIPC_SKB_CB(skb)->chain_imp; | |
187 | lim = bcl->window + bcl->backlog[imp].limit; | |
188 | pnd[imp] += TIPC_SKB_CB(skb)->chain_sz; | |
189 | if ((pnd[imp] + bcl->backlog[imp].len) >= lim) | |
190 | continue; | |
191 | skb_unlink(skb, &bcl->wakeupq); | |
192 | skb_queue_tail(resultq, skb); | |
193 | } | |
194 | } | |
195 | ||
908344cd JM |
196 | /** |
197 | * tipc_bclink_wakeup_users - wake up pending users | |
198 | * | |
199 | * Called with no locks taken | |
200 | */ | |
f2f9800d | 201 | void tipc_bclink_wakeup_users(struct net *net) |
908344cd | 202 | { |
1da46568 | 203 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
7845989c KD |
204 | struct tipc_link *bcl = tn->bcl; |
205 | struct sk_buff_head resultq; | |
4988bb4a | 206 | |
7845989c KD |
207 | skb_queue_head_init(&resultq); |
208 | bclink_prepare_wakeup(bcl, &resultq); | |
209 | tipc_sk_rcv(net, &resultq); | |
908344cd JM |
210 | } |
211 | ||
c4307285 | 212 | /** |
4323add6 | 213 | * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets |
b97bf3fd PL |
214 | * @n_ptr: node that sent acknowledgement info |
215 | * @acked: broadcast sequence # that has been acknowledged | |
c4307285 | 216 | * |
d69afc90 | 217 | * Node is locked, bclink_lock unlocked. |
b97bf3fd | 218 | */ |
6c00055a | 219 | void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked) |
b97bf3fd | 220 | { |
58dc55f2 | 221 | struct sk_buff *skb, *tmp; |
b97bf3fd | 222 | unsigned int released = 0; |
1da46568 YX |
223 | struct net *net = n_ptr->net; |
224 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
b97bf3fd | 225 | |
2cdf3918 JPM |
226 | if (unlikely(!n_ptr->bclink.recv_permitted)) |
227 | return; | |
228 | ||
1da46568 | 229 | tipc_bclink_lock(net); |
2cdf3918 | 230 | |
36559591 | 231 | /* Bail out if tx queue is empty (no clean up is required) */ |
05dcc5aa | 232 | skb = skb_peek(&tn->bcl->transmq); |
58dc55f2 | 233 | if (!skb) |
36559591 AS |
234 | goto exit; |
235 | ||
236 | /* Determine which messages need to be acknowledged */ | |
237 | if (acked == INVALID_LINK_SEQ) { | |
238 | /* | |
239 | * Contact with specified node has been lost, so need to | |
240 | * acknowledge sent messages only (if other nodes still exist) | |
241 | * or both sent and unsent messages (otherwise) | |
242 | */ | |
1da46568 | 243 | if (tn->bclink->bcast_nodes.count) |
a97b9d3f | 244 | acked = tn->bcl->silent_intv_cnt; |
36559591 | 245 | else |
a97b9d3f | 246 | acked = tn->bcl->snd_nxt; |
36559591 AS |
247 | } else { |
248 | /* | |
249 | * Bail out if specified sequence number does not correspond | |
250 | * to a message that has been sent and not yet acknowledged | |
251 | */ | |
58dc55f2 | 252 | if (less(acked, buf_seqno(skb)) || |
a97b9d3f | 253 | less(tn->bcl->silent_intv_cnt, acked) || |
36559591 AS |
254 | less_eq(acked, n_ptr->bclink.acked)) |
255 | goto exit; | |
256 | } | |
257 | ||
258 | /* Skip over packets that node has previously acknowledged */ | |
05dcc5aa | 259 | skb_queue_walk(&tn->bcl->transmq, skb) { |
58dc55f2 YX |
260 | if (more(buf_seqno(skb), n_ptr->bclink.acked)) |
261 | break; | |
262 | } | |
b97bf3fd PL |
263 | |
264 | /* Update packets that node is now acknowledging */ | |
05dcc5aa | 265 | skb_queue_walk_from_safe(&tn->bcl->transmq, skb, tmp) { |
58dc55f2 YX |
266 | if (more(buf_seqno(skb), acked)) |
267 | break; | |
05dcc5aa JPM |
268 | bcbuf_decr_acks(skb); |
269 | bclink_set_last_sent(net); | |
58dc55f2 | 270 | if (bcbuf_acks(skb) == 0) { |
05dcc5aa | 271 | __skb_unlink(skb, &tn->bcl->transmq); |
58dc55f2 | 272 | kfree_skb(skb); |
b97bf3fd PL |
273 | released = 1; |
274 | } | |
b97bf3fd PL |
275 | } |
276 | n_ptr->bclink.acked = acked; | |
277 | ||
278 | /* Try resolving broadcast link congestion, if necessary */ | |
05dcc5aa | 279 | if (unlikely(skb_peek(&tn->bcl->backlogq))) { |
1da46568 YX |
280 | tipc_link_push_packets(tn->bcl); |
281 | bclink_set_last_sent(net); | |
5b1f7bde | 282 | } |
c637c103 | 283 | if (unlikely(released && !skb_queue_empty(&tn->bcl->wakeupq))) |
908344cd | 284 | n_ptr->action_flags |= TIPC_WAKEUP_BCAST_USERS; |
36559591 | 285 | exit: |
1da46568 | 286 | tipc_bclink_unlock(net); |
b97bf3fd PL |
287 | } |
288 | ||
2c53040f | 289 | /** |
7a54d4a9 | 290 | * tipc_bclink_update_link_state - update broadcast link state |
c4307285 | 291 | * |
7216cd94 | 292 | * RCU and node lock set |
b97bf3fd | 293 | */ |
c5898636 | 294 | void tipc_bclink_update_link_state(struct tipc_node *n_ptr, |
c93d3baa | 295 | u32 last_sent) |
b97bf3fd | 296 | { |
7a54d4a9 | 297 | struct sk_buff *buf; |
c5898636 | 298 | struct net *net = n_ptr->net; |
c93d3baa | 299 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
b97bf3fd | 300 | |
7a54d4a9 | 301 | /* Ignore "stale" link state info */ |
7a54d4a9 AS |
302 | if (less_eq(last_sent, n_ptr->bclink.last_in)) |
303 | return; | |
b97bf3fd | 304 | |
7a54d4a9 | 305 | /* Update link synchronization state; quit if in sync */ |
7a54d4a9 AS |
306 | bclink_update_last_sent(n_ptr, last_sent); |
307 | ||
308 | if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in) | |
309 | return; | |
310 | ||
311 | /* Update out-of-sync state; quit if loss is still unconfirmed */ | |
7a54d4a9 AS |
312 | if ((++n_ptr->bclink.oos_state) == 1) { |
313 | if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2)) | |
314 | return; | |
315 | n_ptr->bclink.oos_state++; | |
316 | } | |
317 | ||
318 | /* Don't NACK if one has been recently sent (or seen) */ | |
7a54d4a9 | 319 | if (n_ptr->bclink.oos_state & 0x1) |
b97bf3fd PL |
320 | return; |
321 | ||
7a54d4a9 | 322 | /* Send NACK */ |
31e3c3f6 | 323 | buf = tipc_buf_acquire(INT_H_SIZE); |
b97bf3fd | 324 | if (buf) { |
7a54d4a9 | 325 | struct tipc_msg *msg = buf_msg(buf); |
05dcc5aa | 326 | struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferdq); |
bc6fecd4 | 327 | u32 to = skb ? buf_seqno(skb) - 1 : n_ptr->bclink.last_sent; |
7a54d4a9 | 328 | |
c5898636 | 329 | tipc_msg_init(tn->own_addr, msg, BCAST_PROTOCOL, STATE_MSG, |
7a54d4a9 | 330 | INT_H_SIZE, n_ptr->addr); |
bf781ecf | 331 | msg_set_non_seq(msg, 1); |
c93d3baa | 332 | msg_set_mc_netid(msg, tn->net_id); |
7a54d4a9 AS |
333 | msg_set_bcast_ack(msg, n_ptr->bclink.last_in); |
334 | msg_set_bcgap_after(msg, n_ptr->bclink.last_in); | |
bc6fecd4 | 335 | msg_set_bcgap_to(msg, to); |
b97bf3fd | 336 | |
1da46568 | 337 | tipc_bclink_lock(net); |
7f9f95d9 | 338 | tipc_bearer_send(net, MAX_BEARERS, buf, NULL); |
1da46568 YX |
339 | tn->bcl->stats.sent_nacks++; |
340 | tipc_bclink_unlock(net); | |
5f6d9123 | 341 | kfree_skb(buf); |
b97bf3fd | 342 | |
7a54d4a9 | 343 | n_ptr->bclink.oos_state++; |
b97bf3fd PL |
344 | } |
345 | } | |
346 | ||
d999297c JPM |
347 | void tipc_bclink_sync_state(struct tipc_node *n, struct tipc_msg *hdr) |
348 | { | |
349 | u16 last = msg_last_bcast(hdr); | |
350 | int mtyp = msg_type(hdr); | |
351 | ||
352 | if (unlikely(msg_user(hdr) != LINK_PROTOCOL)) | |
353 | return; | |
354 | if (mtyp == STATE_MSG) { | |
355 | tipc_bclink_update_link_state(n, last); | |
356 | return; | |
357 | } | |
358 | /* Compatibility: older nodes don't know BCAST_PROTOCOL synchronization, | |
359 | * and transfer synch info in LINK_PROTOCOL messages. | |
360 | */ | |
361 | if (tipc_node_is_up(n)) | |
362 | return; | |
363 | if ((mtyp != RESET_MSG) && (mtyp != ACTIVATE_MSG)) | |
364 | return; | |
365 | n->bclink.last_sent = last; | |
366 | n->bclink.last_in = last; | |
367 | n->bclink.oos_state = 0; | |
368 | } | |
369 | ||
2c53040f | 370 | /** |
7a54d4a9 | 371 | * bclink_peek_nack - monitor retransmission requests sent by other nodes |
b97bf3fd | 372 | * |
7a54d4a9 AS |
373 | * Delay any upcoming NACK by this node if another node has already |
374 | * requested the first message this node is going to ask for. | |
b97bf3fd | 375 | */ |
f2f9800d | 376 | static void bclink_peek_nack(struct net *net, struct tipc_msg *msg) |
b97bf3fd | 377 | { |
f2f9800d | 378 | struct tipc_node *n_ptr = tipc_node_find(net, msg_destnode(msg)); |
b97bf3fd | 379 | |
7a54d4a9 | 380 | if (unlikely(!n_ptr)) |
b97bf3fd | 381 | return; |
7a54d4a9 | 382 | |
4323add6 | 383 | tipc_node_lock(n_ptr); |
389dd9bc | 384 | if (n_ptr->bclink.recv_permitted && |
7a54d4a9 AS |
385 | (n_ptr->bclink.last_in != n_ptr->bclink.last_sent) && |
386 | (n_ptr->bclink.last_in == msg_bcgap_after(msg))) | |
387 | n_ptr->bclink.oos_state = 2; | |
4323add6 | 388 | tipc_node_unlock(n_ptr); |
8a0f6ebe | 389 | tipc_node_put(n_ptr); |
b97bf3fd PL |
390 | } |
391 | ||
cb1b7280 | 392 | /* tipc_bclink_xmit - deliver buffer chain to all nodes in cluster |
9fbfb8b1 | 393 | * and to identified node local sockets |
f2f9800d | 394 | * @net: the applicable net namespace |
a6ca1094 | 395 | * @list: chain of buffers containing message |
078bec82 JPM |
396 | * Consumes the buffer chain, except when returning -ELINKCONG |
397 | * Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE | |
398 | */ | |
f2f9800d | 399 | int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list) |
078bec82 | 400 | { |
1da46568 YX |
401 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
402 | struct tipc_link *bcl = tn->bcl; | |
403 | struct tipc_bclink *bclink = tn->bclink; | |
078bec82 JPM |
404 | int rc = 0; |
405 | int bc = 0; | |
a6ca1094 | 406 | struct sk_buff *skb; |
cb1b7280 JPM |
407 | struct sk_buff_head arrvq; |
408 | struct sk_buff_head inputq; | |
078bec82 JPM |
409 | |
410 | /* Prepare clone of message for local node */ | |
a6ca1094 | 411 | skb = tipc_msg_reassemble(list); |
22d85c79 | 412 | if (unlikely(!skb)) |
078bec82 | 413 | return -EHOSTUNREACH; |
22d85c79 | 414 | |
cb1b7280 | 415 | /* Broadcast to all nodes */ |
078bec82 | 416 | if (likely(bclink)) { |
1da46568 | 417 | tipc_bclink_lock(net); |
078bec82 | 418 | if (likely(bclink->bcast_nodes.count)) { |
7f9f95d9 | 419 | rc = __tipc_link_xmit(net, bcl, list); |
078bec82 | 420 | if (likely(!rc)) { |
05dcc5aa | 421 | u32 len = skb_queue_len(&bcl->transmq); |
58dc55f2 | 422 | |
1da46568 | 423 | bclink_set_last_sent(net); |
078bec82 | 424 | bcl->stats.queue_sz_counts++; |
58dc55f2 | 425 | bcl->stats.accu_queue_sz += len; |
078bec82 JPM |
426 | } |
427 | bc = 1; | |
428 | } | |
1da46568 | 429 | tipc_bclink_unlock(net); |
078bec82 JPM |
430 | } |
431 | ||
432 | if (unlikely(!bc)) | |
a6ca1094 | 433 | __skb_queue_purge(list); |
078bec82 | 434 | |
cb1b7280 | 435 | if (unlikely(rc)) { |
a6ca1094 | 436 | kfree_skb(skb); |
cb1b7280 JPM |
437 | return rc; |
438 | } | |
439 | /* Deliver message clone */ | |
440 | __skb_queue_head_init(&arrvq); | |
441 | skb_queue_head_init(&inputq); | |
442 | __skb_queue_tail(&arrvq, skb); | |
443 | tipc_sk_mcast_rcv(net, &arrvq, &inputq); | |
078bec82 JPM |
444 | return rc; |
445 | } | |
446 | ||
2c53040f | 447 | /** |
63e7f1ac AS |
448 | * bclink_accept_pkt - accept an incoming, in-sequence broadcast packet |
449 | * | |
d69afc90 | 450 | * Called with both sending node's lock and bclink_lock taken. |
63e7f1ac | 451 | */ |
63e7f1ac AS |
452 | static void bclink_accept_pkt(struct tipc_node *node, u32 seqno) |
453 | { | |
1da46568 YX |
454 | struct tipc_net *tn = net_generic(node->net, tipc_net_id); |
455 | ||
63e7f1ac AS |
456 | bclink_update_last_sent(node, seqno); |
457 | node->bclink.last_in = seqno; | |
458 | node->bclink.oos_state = 0; | |
1da46568 | 459 | tn->bcl->stats.recv_info++; |
63e7f1ac AS |
460 | |
461 | /* | |
462 | * Unicast an ACK periodically, ensuring that | |
463 | * all nodes in the cluster don't ACK at the same time | |
464 | */ | |
34747539 | 465 | if (((seqno - tn->own_addr) % TIPC_MIN_LINK_WIN) == 0) { |
9d13ec65 | 466 | tipc_link_proto_xmit(node_active_link(node, node->addr), |
ed193ece | 467 | STATE_MSG, 0, 0, 0, 0); |
1da46568 | 468 | tn->bcl->stats.sent_acks++; |
63e7f1ac AS |
469 | } |
470 | } | |
471 | ||
2c53040f | 472 | /** |
247f0f3c | 473 | * tipc_bclink_rcv - receive a broadcast packet, and deliver upwards |
c4307285 | 474 | * |
7216cd94 | 475 | * RCU is locked, no other locks set |
b97bf3fd | 476 | */ |
c93d3baa | 477 | void tipc_bclink_rcv(struct net *net, struct sk_buff *buf) |
d356eeba | 478 | { |
c93d3baa | 479 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 | 480 | struct tipc_link *bcl = tn->bcl; |
b97bf3fd | 481 | struct tipc_msg *msg = buf_msg(buf); |
5d3c488d | 482 | struct tipc_node *node; |
b97bf3fd PL |
483 | u32 next_in; |
484 | u32 seqno; | |
0abd8ff2 | 485 | int deferred = 0; |
c637c103 JPM |
486 | int pos = 0; |
487 | struct sk_buff *iskb; | |
cb1b7280 | 488 | struct sk_buff_head *arrvq, *inputq; |
b97bf3fd | 489 | |
5d3c488d | 490 | /* Screen out unwanted broadcast messages */ |
c93d3baa | 491 | if (msg_mc_netid(msg) != tn->net_id) |
5d3c488d AS |
492 | goto exit; |
493 | ||
f2f9800d | 494 | node = tipc_node_find(net, msg_prevnode(msg)); |
5d3c488d AS |
495 | if (unlikely(!node)) |
496 | goto exit; | |
497 | ||
498 | tipc_node_lock(node); | |
389dd9bc | 499 | if (unlikely(!node->bclink.recv_permitted)) |
5d3c488d | 500 | goto unlock; |
b97bf3fd | 501 | |
8a275a6a | 502 | /* Handle broadcast protocol message */ |
b97bf3fd | 503 | if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) { |
9f6bdcd4 AS |
504 | if (msg_type(msg) != STATE_MSG) |
505 | goto unlock; | |
34747539 | 506 | if (msg_destnode(msg) == tn->own_addr) { |
4323add6 | 507 | tipc_bclink_acknowledge(node, msg_bcast_ack(msg)); |
1da46568 | 508 | tipc_bclink_lock(net); |
b97bf3fd | 509 | bcl->stats.recv_nacks++; |
1da46568 YX |
510 | tn->bclink->retransmit_to = node; |
511 | bclink_retransmit_pkt(tn, msg_bcgap_after(msg), | |
b97bf3fd | 512 | msg_bcgap_to(msg)); |
1da46568 | 513 | tipc_bclink_unlock(net); |
b952b2be | 514 | tipc_node_unlock(node); |
b97bf3fd | 515 | } else { |
5d3c488d | 516 | tipc_node_unlock(node); |
f2f9800d | 517 | bclink_peek_nack(net, msg); |
b97bf3fd | 518 | } |
8a0f6ebe | 519 | tipc_node_put(node); |
5d3c488d | 520 | goto exit; |
b97bf3fd PL |
521 | } |
522 | ||
5d3c488d | 523 | /* Handle in-sequence broadcast message */ |
b97bf3fd | 524 | seqno = msg_seqno(msg); |
8a275a6a | 525 | next_in = mod(node->bclink.last_in + 1); |
cb1b7280 JPM |
526 | arrvq = &tn->bclink->arrvq; |
527 | inputq = &tn->bclink->inputq; | |
b97bf3fd PL |
528 | |
529 | if (likely(seqno == next_in)) { | |
8a275a6a | 530 | receive: |
7a54d4a9 | 531 | /* Deliver message to destination */ |
b97bf3fd | 532 | if (likely(msg_isdata(msg))) { |
1da46568 | 533 | tipc_bclink_lock(net); |
63e7f1ac | 534 | bclink_accept_pkt(node, seqno); |
cb1b7280 JPM |
535 | spin_lock_bh(&inputq->lock); |
536 | __skb_queue_tail(arrvq, buf); | |
537 | spin_unlock_bh(&inputq->lock); | |
538 | node->action_flags |= TIPC_BCAST_MSG_EVT; | |
1da46568 | 539 | tipc_bclink_unlock(net); |
4323add6 | 540 | tipc_node_unlock(node); |
b97bf3fd | 541 | } else if (msg_user(msg) == MSG_BUNDLER) { |
1da46568 | 542 | tipc_bclink_lock(net); |
63e7f1ac | 543 | bclink_accept_pkt(node, seqno); |
b97bf3fd PL |
544 | bcl->stats.recv_bundles++; |
545 | bcl->stats.recv_bundled += msg_msgcnt(msg); | |
cb1b7280 JPM |
546 | pos = 0; |
547 | while (tipc_msg_extract(buf, &iskb, &pos)) { | |
548 | spin_lock_bh(&inputq->lock); | |
549 | __skb_queue_tail(arrvq, iskb); | |
550 | spin_unlock_bh(&inputq->lock); | |
551 | } | |
552 | node->action_flags |= TIPC_BCAST_MSG_EVT; | |
1da46568 | 553 | tipc_bclink_unlock(net); |
4323add6 | 554 | tipc_node_unlock(node); |
b97bf3fd | 555 | } else if (msg_user(msg) == MSG_FRAGMENTER) { |
1da46568 | 556 | tipc_bclink_lock(net); |
63e7f1ac | 557 | bclink_accept_pkt(node, seqno); |
bc14b8d6 YX |
558 | tipc_buf_append(&node->bclink.reasm_buf, &buf); |
559 | if (unlikely(!buf && !node->bclink.reasm_buf)) { | |
560 | tipc_bclink_unlock(net); | |
561 | goto unlock; | |
562 | } | |
b97bf3fd | 563 | bcl->stats.recv_fragments++; |
37e22164 | 564 | if (buf) { |
b97bf3fd | 565 | bcl->stats.recv_fragmented++; |
40ba3cdf | 566 | msg = buf_msg(buf); |
1da46568 | 567 | tipc_bclink_unlock(net); |
528f6f4b EH |
568 | goto receive; |
569 | } | |
1da46568 | 570 | tipc_bclink_unlock(net); |
4323add6 | 571 | tipc_node_unlock(node); |
b97bf3fd | 572 | } else { |
1da46568 | 573 | tipc_bclink_lock(net); |
63e7f1ac | 574 | bclink_accept_pkt(node, seqno); |
1da46568 | 575 | tipc_bclink_unlock(net); |
4323add6 | 576 | tipc_node_unlock(node); |
5f6d9123 | 577 | kfree_skb(buf); |
b97bf3fd | 578 | } |
5d3c488d | 579 | buf = NULL; |
8a275a6a AS |
580 | |
581 | /* Determine new synchronization state */ | |
5d3c488d | 582 | tipc_node_lock(node); |
8a275a6a AS |
583 | if (unlikely(!tipc_node_is_up(node))) |
584 | goto unlock; | |
585 | ||
7a54d4a9 | 586 | if (node->bclink.last_in == node->bclink.last_sent) |
8a275a6a AS |
587 | goto unlock; |
588 | ||
05dcc5aa | 589 | if (skb_queue_empty(&node->bclink.deferdq)) { |
7a54d4a9 AS |
590 | node->bclink.oos_state = 1; |
591 | goto unlock; | |
592 | } | |
593 | ||
05dcc5aa | 594 | msg = buf_msg(skb_peek(&node->bclink.deferdq)); |
8a275a6a AS |
595 | seqno = msg_seqno(msg); |
596 | next_in = mod(next_in + 1); | |
597 | if (seqno != next_in) | |
598 | goto unlock; | |
599 | ||
600 | /* Take in-sequence message from deferred queue & deliver it */ | |
05dcc5aa | 601 | buf = __skb_dequeue(&node->bclink.deferdq); |
8a275a6a AS |
602 | goto receive; |
603 | } | |
604 | ||
605 | /* Handle out-of-sequence broadcast message */ | |
8a275a6a | 606 | if (less(next_in, seqno)) { |
05dcc5aa | 607 | deferred = tipc_link_defer_pkt(&node->bclink.deferdq, |
8a275a6a | 608 | buf); |
7a54d4a9 | 609 | bclink_update_last_sent(node, seqno); |
5d3c488d | 610 | buf = NULL; |
0abd8ff2 | 611 | } |
8a275a6a | 612 | |
1da46568 | 613 | tipc_bclink_lock(net); |
b98158e3 | 614 | |
8a275a6a AS |
615 | if (deferred) |
616 | bcl->stats.deferred_recv++; | |
0232c5a5 AS |
617 | else |
618 | bcl->stats.duplicates++; | |
8a275a6a | 619 | |
1da46568 | 620 | tipc_bclink_unlock(net); |
b98158e3 | 621 | |
5d3c488d | 622 | unlock: |
4323add6 | 623 | tipc_node_unlock(node); |
8a0f6ebe | 624 | tipc_node_put(node); |
5d3c488d | 625 | exit: |
5f6d9123 | 626 | kfree_skb(buf); |
b97bf3fd PL |
627 | } |
628 | ||
6c00055a | 629 | u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr) |
b97bf3fd | 630 | { |
389dd9bc | 631 | return (n_ptr->bclink.recv_permitted && |
1da46568 | 632 | (tipc_bclink_get_last_sent(n_ptr->net) != n_ptr->bclink.acked)); |
b97bf3fd PL |
633 | } |
634 | ||
635 | ||
636 | /** | |
4323add6 | 637 | * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer |
c4307285 | 638 | * |
2ff9f924 AS |
639 | * Send packet over as many bearers as necessary to reach all nodes |
640 | * that have joined the broadcast link. | |
c4307285 | 641 | * |
2ff9f924 AS |
642 | * Returns 0 (packet sent successfully) under all circumstances, |
643 | * since the broadcast link's pseudo-bearer never blocks | |
b97bf3fd | 644 | */ |
1da46568 YX |
645 | static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf, |
646 | struct tipc_bearer *unused1, | |
988f088a | 647 | struct tipc_media_addr *unused2) |
b97bf3fd | 648 | { |
b97bf3fd | 649 | int bp_index; |
6f92ee54 | 650 | struct tipc_msg *msg = buf_msg(buf); |
c93d3baa | 651 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 YX |
652 | struct tipc_bcbearer *bcbearer = tn->bcbearer; |
653 | struct tipc_bclink *bclink = tn->bclink; | |
b97bf3fd | 654 | |
e6160710 | 655 | /* Prepare broadcast link message for reliable transmission, |
2ff9f924 AS |
656 | * if first time trying to send it; |
657 | * preparation is skipped for broadcast link protocol messages | |
658 | * since they are sent in an unreliable manner and don't need it | |
659 | */ | |
b97bf3fd | 660 | if (likely(!msg_non_seq(buf_msg(buf)))) { |
cd3decdf | 661 | bcbuf_set_acks(buf, bclink->bcast_nodes.count); |
40aecb1b | 662 | msg_set_non_seq(msg, 1); |
c93d3baa | 663 | msg_set_mc_netid(msg, tn->net_id); |
1da46568 | 664 | tn->bcl->stats.sent_info++; |
cd3decdf | 665 | if (WARN_ON(!bclink->bcast_nodes.count)) { |
5e726900 AS |
666 | dump_stack(); |
667 | return 0; | |
668 | } | |
b97bf3fd PL |
669 | } |
670 | ||
b97bf3fd | 671 | /* Send buffer over bearers until all targets reached */ |
cd3decdf | 672 | bcbearer->remains = bclink->bcast_nodes; |
b97bf3fd PL |
673 | |
674 | for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) { | |
2d627b92 AS |
675 | struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary; |
676 | struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary; | |
6f92ee54 JPM |
677 | struct tipc_bearer *bp[2] = {p, s}; |
678 | struct tipc_bearer *b = bp[msg_link_selector(msg)]; | |
488fc9af | 679 | struct sk_buff *tbuf; |
b97bf3fd PL |
680 | |
681 | if (!p) | |
e6160710 | 682 | break; /* No more bearers to try */ |
6f92ee54 JPM |
683 | if (!b) |
684 | b = p; | |
77861d9c | 685 | tipc_nmap_diff(&bcbearer->remains, &b->nodes, |
e6160710 | 686 | &bcbearer->remains_new); |
65f51ef0 | 687 | if (bcbearer->remains_new.count == bcbearer->remains.count) |
e6160710 | 688 | continue; /* Nothing added by bearer pair */ |
b97bf3fd | 689 | |
488fc9af GF |
690 | if (bp_index == 0) { |
691 | /* Use original buffer for first bearer */ | |
7f9f95d9 | 692 | tipc_bearer_send(net, b->identity, buf, &b->bcast_addr); |
488fc9af GF |
693 | } else { |
694 | /* Avoid concurrent buffer access */ | |
bad93e9d | 695 | tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC); |
488fc9af GF |
696 | if (!tbuf) |
697 | break; | |
7f9f95d9 YX |
698 | tipc_bearer_send(net, b->identity, tbuf, |
699 | &b->bcast_addr); | |
488fc9af GF |
700 | kfree_skb(tbuf); /* Bearer keeps a clone */ |
701 | } | |
65f51ef0 | 702 | if (bcbearer->remains_new.count == 0) |
e6160710 | 703 | break; /* All targets reached */ |
b97bf3fd | 704 | |
65f51ef0 | 705 | bcbearer->remains = bcbearer->remains_new; |
b97bf3fd | 706 | } |
c4307285 | 707 | |
2ff9f924 | 708 | return 0; |
b97bf3fd PL |
709 | } |
710 | ||
711 | /** | |
4323add6 | 712 | * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer |
b97bf3fd | 713 | */ |
7f9f95d9 YX |
714 | void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr, |
715 | u32 node, bool action) | |
b97bf3fd | 716 | { |
7f9f95d9 | 717 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 | 718 | struct tipc_bcbearer *bcbearer = tn->bcbearer; |
7f9ab6ac PG |
719 | struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp; |
720 | struct tipc_bcbearer_pair *bp_curr; | |
f8322dfc | 721 | struct tipc_bearer *b; |
b97bf3fd PL |
722 | int b_index; |
723 | int pri; | |
724 | ||
1da46568 | 725 | tipc_bclink_lock(net); |
b97bf3fd | 726 | |
28dd9418 YX |
727 | if (action) |
728 | tipc_nmap_add(nm_ptr, node); | |
729 | else | |
730 | tipc_nmap_remove(nm_ptr, node); | |
731 | ||
b97bf3fd | 732 | /* Group bearers by priority (can assume max of two per priority) */ |
b97bf3fd PL |
733 | memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp)); |
734 | ||
f8322dfc | 735 | rcu_read_lock(); |
b97bf3fd | 736 | for (b_index = 0; b_index < MAX_BEARERS; b_index++) { |
7f9f95d9 | 737 | b = rcu_dereference_rtnl(tn->bearer_list[b_index]); |
f47de12b | 738 | if (!b || !b->nodes.count) |
b97bf3fd PL |
739 | continue; |
740 | ||
741 | if (!bp_temp[b->priority].primary) | |
742 | bp_temp[b->priority].primary = b; | |
743 | else | |
744 | bp_temp[b->priority].secondary = b; | |
745 | } | |
f8322dfc | 746 | rcu_read_unlock(); |
b97bf3fd PL |
747 | |
748 | /* Create array of bearer pairs for broadcasting */ | |
b97bf3fd PL |
749 | bp_curr = bcbearer->bpairs; |
750 | memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs)); | |
751 | ||
16cb4b33 | 752 | for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) { |
b97bf3fd PL |
753 | |
754 | if (!bp_temp[pri].primary) | |
755 | continue; | |
756 | ||
757 | bp_curr->primary = bp_temp[pri].primary; | |
758 | ||
759 | if (bp_temp[pri].secondary) { | |
4323add6 PL |
760 | if (tipc_nmap_equal(&bp_temp[pri].primary->nodes, |
761 | &bp_temp[pri].secondary->nodes)) { | |
b97bf3fd PL |
762 | bp_curr->secondary = bp_temp[pri].secondary; |
763 | } else { | |
764 | bp_curr++; | |
765 | bp_curr->primary = bp_temp[pri].secondary; | |
766 | } | |
767 | } | |
768 | ||
769 | bp_curr++; | |
770 | } | |
771 | ||
1da46568 | 772 | tipc_bclink_unlock(net); |
b97bf3fd PL |
773 | } |
774 | ||
d8182804 RA |
775 | static int __tipc_nl_add_bc_link_stat(struct sk_buff *skb, |
776 | struct tipc_stats *stats) | |
7be57fc6 RA |
777 | { |
778 | int i; | |
779 | struct nlattr *nest; | |
780 | ||
781 | struct nla_map { | |
782 | __u32 key; | |
783 | __u32 val; | |
784 | }; | |
785 | ||
786 | struct nla_map map[] = { | |
787 | {TIPC_NLA_STATS_RX_INFO, stats->recv_info}, | |
788 | {TIPC_NLA_STATS_RX_FRAGMENTS, stats->recv_fragments}, | |
789 | {TIPC_NLA_STATS_RX_FRAGMENTED, stats->recv_fragmented}, | |
790 | {TIPC_NLA_STATS_RX_BUNDLES, stats->recv_bundles}, | |
791 | {TIPC_NLA_STATS_RX_BUNDLED, stats->recv_bundled}, | |
792 | {TIPC_NLA_STATS_TX_INFO, stats->sent_info}, | |
793 | {TIPC_NLA_STATS_TX_FRAGMENTS, stats->sent_fragments}, | |
794 | {TIPC_NLA_STATS_TX_FRAGMENTED, stats->sent_fragmented}, | |
795 | {TIPC_NLA_STATS_TX_BUNDLES, stats->sent_bundles}, | |
796 | {TIPC_NLA_STATS_TX_BUNDLED, stats->sent_bundled}, | |
797 | {TIPC_NLA_STATS_RX_NACKS, stats->recv_nacks}, | |
798 | {TIPC_NLA_STATS_RX_DEFERRED, stats->deferred_recv}, | |
799 | {TIPC_NLA_STATS_TX_NACKS, stats->sent_nacks}, | |
800 | {TIPC_NLA_STATS_TX_ACKS, stats->sent_acks}, | |
801 | {TIPC_NLA_STATS_RETRANSMITTED, stats->retransmitted}, | |
802 | {TIPC_NLA_STATS_DUPLICATES, stats->duplicates}, | |
803 | {TIPC_NLA_STATS_LINK_CONGS, stats->link_congs}, | |
804 | {TIPC_NLA_STATS_MAX_QUEUE, stats->max_queue_sz}, | |
805 | {TIPC_NLA_STATS_AVG_QUEUE, stats->queue_sz_counts ? | |
806 | (stats->accu_queue_sz / stats->queue_sz_counts) : 0} | |
807 | }; | |
808 | ||
809 | nest = nla_nest_start(skb, TIPC_NLA_LINK_STATS); | |
810 | if (!nest) | |
811 | return -EMSGSIZE; | |
812 | ||
813 | for (i = 0; i < ARRAY_SIZE(map); i++) | |
814 | if (nla_put_u32(skb, map[i].key, map[i].val)) | |
815 | goto msg_full; | |
816 | ||
817 | nla_nest_end(skb, nest); | |
818 | ||
819 | return 0; | |
820 | msg_full: | |
821 | nla_nest_cancel(skb, nest); | |
822 | ||
823 | return -EMSGSIZE; | |
824 | } | |
825 | ||
1da46568 | 826 | int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg) |
7be57fc6 RA |
827 | { |
828 | int err; | |
829 | void *hdr; | |
830 | struct nlattr *attrs; | |
831 | struct nlattr *prop; | |
1da46568 YX |
832 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
833 | struct tipc_link *bcl = tn->bcl; | |
7be57fc6 RA |
834 | |
835 | if (!bcl) | |
836 | return 0; | |
837 | ||
1da46568 | 838 | tipc_bclink_lock(net); |
7be57fc6 | 839 | |
bfb3e5dd | 840 | hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family, |
7be57fc6 RA |
841 | NLM_F_MULTI, TIPC_NL_LINK_GET); |
842 | if (!hdr) | |
843 | return -EMSGSIZE; | |
844 | ||
845 | attrs = nla_nest_start(msg->skb, TIPC_NLA_LINK); | |
846 | if (!attrs) | |
847 | goto msg_full; | |
848 | ||
849 | /* The broadcast link is always up */ | |
850 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_UP)) | |
851 | goto attr_msg_full; | |
852 | ||
853 | if (nla_put_flag(msg->skb, TIPC_NLA_LINK_BROADCAST)) | |
854 | goto attr_msg_full; | |
855 | if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, bcl->name)) | |
856 | goto attr_msg_full; | |
a97b9d3f | 857 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, bcl->rcv_nxt)) |
7be57fc6 | 858 | goto attr_msg_full; |
a97b9d3f | 859 | if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, bcl->snd_nxt)) |
7be57fc6 RA |
860 | goto attr_msg_full; |
861 | ||
862 | prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP); | |
863 | if (!prop) | |
864 | goto attr_msg_full; | |
1f66d161 | 865 | if (nla_put_u32(msg->skb, TIPC_NLA_PROP_WIN, bcl->window)) |
7be57fc6 RA |
866 | goto prop_msg_full; |
867 | nla_nest_end(msg->skb, prop); | |
868 | ||
869 | err = __tipc_nl_add_bc_link_stat(msg->skb, &bcl->stats); | |
870 | if (err) | |
871 | goto attr_msg_full; | |
872 | ||
1da46568 | 873 | tipc_bclink_unlock(net); |
7be57fc6 RA |
874 | nla_nest_end(msg->skb, attrs); |
875 | genlmsg_end(msg->skb, hdr); | |
876 | ||
877 | return 0; | |
878 | ||
879 | prop_msg_full: | |
880 | nla_nest_cancel(msg->skb, prop); | |
881 | attr_msg_full: | |
882 | nla_nest_cancel(msg->skb, attrs); | |
883 | msg_full: | |
1da46568 | 884 | tipc_bclink_unlock(net); |
7be57fc6 RA |
885 | genlmsg_cancel(msg->skb, hdr); |
886 | ||
887 | return -EMSGSIZE; | |
888 | } | |
b97bf3fd | 889 | |
1da46568 | 890 | int tipc_bclink_reset_stats(struct net *net) |
b97bf3fd | 891 | { |
1da46568 YX |
892 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
893 | struct tipc_link *bcl = tn->bcl; | |
894 | ||
b97bf3fd PL |
895 | if (!bcl) |
896 | return -ENOPROTOOPT; | |
897 | ||
1da46568 | 898 | tipc_bclink_lock(net); |
b97bf3fd | 899 | memset(&bcl->stats, 0, sizeof(bcl->stats)); |
1da46568 | 900 | tipc_bclink_unlock(net); |
0e35fd5e | 901 | return 0; |
b97bf3fd PL |
902 | } |
903 | ||
1da46568 | 904 | int tipc_bclink_set_queue_limits(struct net *net, u32 limit) |
b97bf3fd | 905 | { |
1da46568 YX |
906 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
907 | struct tipc_link *bcl = tn->bcl; | |
908 | ||
b97bf3fd PL |
909 | if (!bcl) |
910 | return -ENOPROTOOPT; | |
911 | if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN)) | |
912 | return -EINVAL; | |
913 | ||
1da46568 | 914 | tipc_bclink_lock(net); |
4323add6 | 915 | tipc_link_set_queue_limits(bcl, limit); |
1da46568 | 916 | tipc_bclink_unlock(net); |
0e35fd5e | 917 | return 0; |
b97bf3fd PL |
918 | } |
919 | ||
670f4f88 RA |
920 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]) |
921 | { | |
922 | int err; | |
923 | u32 win; | |
924 | struct nlattr *props[TIPC_NLA_PROP_MAX + 1]; | |
925 | ||
926 | if (!attrs[TIPC_NLA_LINK_PROP]) | |
927 | return -EINVAL; | |
928 | ||
929 | err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props); | |
930 | if (err) | |
931 | return err; | |
932 | ||
933 | if (!props[TIPC_NLA_PROP_WIN]) | |
934 | return -EOPNOTSUPP; | |
935 | ||
936 | win = nla_get_u32(props[TIPC_NLA_PROP_WIN]); | |
937 | ||
938 | return tipc_bclink_set_queue_limits(net, win); | |
939 | } | |
940 | ||
7f9f95d9 | 941 | int tipc_bclink_init(struct net *net) |
b97bf3fd | 942 | { |
7f9f95d9 | 943 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
1da46568 YX |
944 | struct tipc_bcbearer *bcbearer; |
945 | struct tipc_bclink *bclink; | |
946 | struct tipc_link *bcl; | |
7f9f95d9 | 947 | |
eb8b00f5 YX |
948 | bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC); |
949 | if (!bcbearer) | |
950 | return -ENOMEM; | |
951 | ||
952 | bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC); | |
953 | if (!bclink) { | |
954 | kfree(bcbearer); | |
955 | return -ENOMEM; | |
956 | } | |
957 | ||
958 | bcl = &bclink->link; | |
b97bf3fd | 959 | bcbearer->bearer.media = &bcbearer->media; |
4323add6 | 960 | bcbearer->media.send_msg = tipc_bcbearer_send; |
2e2d9be8 | 961 | sprintf(bcbearer->media.name, "tipc-broadcast"); |
b97bf3fd | 962 | |
d69afc90 | 963 | spin_lock_init(&bclink->lock); |
05dcc5aa JPM |
964 | __skb_queue_head_init(&bcl->transmq); |
965 | __skb_queue_head_init(&bcl->backlogq); | |
966 | __skb_queue_head_init(&bcl->deferdq); | |
c637c103 | 967 | skb_queue_head_init(&bcl->wakeupq); |
a97b9d3f | 968 | bcl->snd_nxt = 1; |
34af946a | 969 | spin_lock_init(&bclink->node.lock); |
cb1b7280 JPM |
970 | __skb_queue_head_init(&bclink->arrvq); |
971 | skb_queue_head_init(&bclink->inputq); | |
b97bf3fd | 972 | bcl->owner = &bclink->node; |
1da46568 | 973 | bcl->owner->net = net; |
ed193ece | 974 | bcl->mtu = MAX_PKT_DEFAULT_MCAST; |
4323add6 | 975 | tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); |
7a2f7d18 | 976 | bcl->bearer_id = MAX_BEARERS; |
7f9f95d9 | 977 | rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcbearer->bearer); |
c5898636 JPM |
978 | bcl->pmsg = (struct tipc_msg *)&bcl->proto_msg; |
979 | msg_set_prevnode(bcl->pmsg, tn->own_addr); | |
4b704d59 | 980 | strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); |
1da46568 YX |
981 | tn->bcbearer = bcbearer; |
982 | tn->bclink = bclink; | |
983 | tn->bcl = bcl; | |
eb8b00f5 | 984 | return 0; |
b97bf3fd PL |
985 | } |
986 | ||
7f9f95d9 | 987 | void tipc_bclink_stop(struct net *net) |
b97bf3fd | 988 | { |
7f9f95d9 YX |
989 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
990 | ||
1da46568 YX |
991 | tipc_bclink_lock(net); |
992 | tipc_link_purge_queues(tn->bcl); | |
993 | tipc_bclink_unlock(net); | |
c47e9b91 | 994 | |
7f9f95d9 | 995 | RCU_INIT_POINTER(tn->bearer_list[BCBEARER], NULL); |
eb8b00f5 | 996 | synchronize_net(); |
1da46568 YX |
997 | kfree(tn->bcbearer); |
998 | kfree(tn->bclink); | |
b97bf3fd PL |
999 | } |
1000 | ||
3e22e62b AS |
1001 | /** |
1002 | * tipc_nmap_add - add a node to a node map | |
1003 | */ | |
28dd9418 | 1004 | static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node) |
3e22e62b AS |
1005 | { |
1006 | int n = tipc_node(node); | |
1007 | int w = n / WSIZE; | |
1008 | u32 mask = (1 << (n % WSIZE)); | |
1009 | ||
1010 | if ((nm_ptr->map[w] & mask) == 0) { | |
1011 | nm_ptr->count++; | |
1012 | nm_ptr->map[w] |= mask; | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | /** | |
1017 | * tipc_nmap_remove - remove a node from a node map | |
1018 | */ | |
28dd9418 | 1019 | static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node) |
3e22e62b AS |
1020 | { |
1021 | int n = tipc_node(node); | |
1022 | int w = n / WSIZE; | |
1023 | u32 mask = (1 << (n % WSIZE)); | |
1024 | ||
1025 | if ((nm_ptr->map[w] & mask) != 0) { | |
1026 | nm_ptr->map[w] &= ~mask; | |
1027 | nm_ptr->count--; | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | /** | |
1032 | * tipc_nmap_diff - find differences between node maps | |
1033 | * @nm_a: input node map A | |
1034 | * @nm_b: input node map B | |
1035 | * @nm_diff: output node map A-B (i.e. nodes of A that are not in B) | |
1036 | */ | |
31e3c3f6 | 1037 | static void tipc_nmap_diff(struct tipc_node_map *nm_a, |
1038 | struct tipc_node_map *nm_b, | |
1039 | struct tipc_node_map *nm_diff) | |
3e22e62b AS |
1040 | { |
1041 | int stop = ARRAY_SIZE(nm_a->map); | |
1042 | int w; | |
1043 | int b; | |
1044 | u32 map; | |
1045 | ||
1046 | memset(nm_diff, 0, sizeof(*nm_diff)); | |
1047 | for (w = 0; w < stop; w++) { | |
1048 | map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]); | |
1049 | nm_diff->map[w] = map; | |
1050 | if (map != 0) { | |
1051 | for (b = 0 ; b < WSIZE; b++) { | |
1052 | if (map & (1 << b)) | |
1053 | nm_diff->count++; | |
1054 | } | |
1055 | } | |
1056 | } | |
1057 | } |