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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. | |
2a1d9b7f RD |
3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
4 | * Copyright (c) 2004 Voltaire, Inc. All rights reserved. | |
1da177e4 LT |
5 | * |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
33 | * | |
34 | * $Id: ipoib_multicast.c 1362 2004-12-18 15:56:29Z roland $ | |
35 | */ | |
36 | ||
37 | #include <linux/skbuff.h> | |
38 | #include <linux/rtnetlink.h> | |
39 | #include <linux/ip.h> | |
40 | #include <linux/in.h> | |
41 | #include <linux/igmp.h> | |
42 | #include <linux/inetdevice.h> | |
43 | #include <linux/delay.h> | |
44 | #include <linux/completion.h> | |
45 | ||
14c85021 ACM |
46 | #include <net/dst.h> |
47 | ||
1da177e4 LT |
48 | #include "ipoib.h" |
49 | ||
50 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG | |
51 | static int mcast_debug_level; | |
52 | ||
53 | module_param(mcast_debug_level, int, 0644); | |
54 | MODULE_PARM_DESC(mcast_debug_level, | |
55 | "Enable multicast debug tracing if > 0"); | |
56 | #endif | |
57 | ||
95ed644f | 58 | static DEFINE_MUTEX(mcast_mutex); |
1da177e4 LT |
59 | |
60 | /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */ | |
61 | struct ipoib_mcast { | |
62 | struct ib_sa_mcmember_rec mcmember; | |
63 | struct ipoib_ah *ah; | |
64 | ||
65 | struct rb_node rb_node; | |
66 | struct list_head list; | |
67 | struct completion done; | |
68 | ||
69 | int query_id; | |
70 | struct ib_sa_query *query; | |
71 | ||
72 | unsigned long created; | |
73 | unsigned long backoff; | |
74 | ||
75 | unsigned long flags; | |
76 | unsigned char logcount; | |
77 | ||
78 | struct list_head neigh_list; | |
79 | ||
80 | struct sk_buff_head pkt_queue; | |
81 | ||
82 | struct net_device *dev; | |
83 | }; | |
84 | ||
85 | struct ipoib_mcast_iter { | |
86 | struct net_device *dev; | |
87 | union ib_gid mgid; | |
88 | unsigned long created; | |
89 | unsigned int queuelen; | |
90 | unsigned int complete; | |
91 | unsigned int send_only; | |
92 | }; | |
93 | ||
94 | static void ipoib_mcast_free(struct ipoib_mcast *mcast) | |
95 | { | |
96 | struct net_device *dev = mcast->dev; | |
97 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
98 | struct ipoib_neigh *neigh, *tmp; | |
99 | unsigned long flags; | |
1da177e4 LT |
100 | |
101 | ipoib_dbg_mcast(netdev_priv(dev), | |
102 | "deleting multicast group " IPOIB_GID_FMT "\n", | |
103 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
104 | ||
105 | spin_lock_irqsave(&priv->lock, flags); | |
106 | ||
107 | list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) { | |
97460df3 EC |
108 | /* |
109 | * It's safe to call ipoib_put_ah() inside priv->lock | |
110 | * here, because we know that mcast->ah will always | |
111 | * hold one more reference, so ipoib_put_ah() will | |
112 | * never do more than decrement the ref count. | |
113 | */ | |
1da177e4 | 114 | if (neigh->ah) |
97460df3 | 115 | ipoib_put_ah(neigh->ah); |
1da177e4 LT |
116 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
117 | neigh->neighbour->ops->destructor = NULL; | |
118 | kfree(neigh); | |
119 | } | |
120 | ||
121 | spin_unlock_irqrestore(&priv->lock, flags); | |
122 | ||
1da177e4 LT |
123 | if (mcast->ah) |
124 | ipoib_put_ah(mcast->ah); | |
125 | ||
8c608a32 RD |
126 | while (!skb_queue_empty(&mcast->pkt_queue)) |
127 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); | |
1da177e4 LT |
128 | |
129 | kfree(mcast); | |
130 | } | |
131 | ||
132 | static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, | |
133 | int can_sleep) | |
134 | { | |
135 | struct ipoib_mcast *mcast; | |
136 | ||
de6eb66b | 137 | mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC); |
1da177e4 LT |
138 | if (!mcast) |
139 | return NULL; | |
140 | ||
1da177e4 LT |
141 | mcast->dev = dev; |
142 | mcast->created = jiffies; | |
ce5b65cc | 143 | mcast->backoff = 1; |
1da177e4 LT |
144 | |
145 | INIT_LIST_HEAD(&mcast->list); | |
146 | INIT_LIST_HEAD(&mcast->neigh_list); | |
147 | skb_queue_head_init(&mcast->pkt_queue); | |
148 | ||
1da177e4 LT |
149 | return mcast; |
150 | } | |
151 | ||
152 | static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_gid *mgid) | |
153 | { | |
154 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
155 | struct rb_node *n = priv->multicast_tree.rb_node; | |
156 | ||
157 | while (n) { | |
158 | struct ipoib_mcast *mcast; | |
159 | int ret; | |
160 | ||
161 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
162 | ||
163 | ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw, | |
164 | sizeof (union ib_gid)); | |
165 | if (ret < 0) | |
166 | n = n->rb_left; | |
167 | else if (ret > 0) | |
168 | n = n->rb_right; | |
169 | else | |
170 | return mcast; | |
171 | } | |
172 | ||
173 | return NULL; | |
174 | } | |
175 | ||
176 | static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) | |
177 | { | |
178 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
179 | struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; | |
180 | ||
181 | while (*n) { | |
182 | struct ipoib_mcast *tmcast; | |
183 | int ret; | |
184 | ||
185 | pn = *n; | |
186 | tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); | |
187 | ||
188 | ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw, | |
189 | sizeof (union ib_gid)); | |
190 | if (ret < 0) | |
191 | n = &pn->rb_left; | |
192 | else if (ret > 0) | |
193 | n = &pn->rb_right; | |
194 | else | |
195 | return -EEXIST; | |
196 | } | |
197 | ||
198 | rb_link_node(&mcast->rb_node, pn, n); | |
199 | rb_insert_color(&mcast->rb_node, &priv->multicast_tree); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, | |
205 | struct ib_sa_mcmember_rec *mcmember) | |
206 | { | |
207 | struct net_device *dev = mcast->dev; | |
208 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
209 | int ret; | |
210 | ||
211 | mcast->mcmember = *mcmember; | |
212 | ||
213 | /* Set the cached Q_Key before we attach if it's the broadcast group */ | |
214 | if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4, | |
215 | sizeof (union ib_gid))) { | |
216 | priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); | |
217 | priv->tx_wr.wr.ud.remote_qkey = priv->qkey; | |
218 | } | |
219 | ||
220 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
221 | if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
222 | ipoib_warn(priv, "multicast group " IPOIB_GID_FMT | |
223 | " already attached\n", | |
224 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid), | |
230 | &mcast->mcmember.mgid); | |
231 | if (ret < 0) { | |
232 | ipoib_warn(priv, "couldn't attach QP to multicast group " | |
233 | IPOIB_GID_FMT "\n", | |
234 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
235 | ||
236 | clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); | |
237 | return ret; | |
238 | } | |
239 | } | |
240 | ||
241 | { | |
242 | struct ib_ah_attr av = { | |
243 | .dlid = be16_to_cpu(mcast->mcmember.mlid), | |
244 | .port_num = priv->port, | |
245 | .sl = mcast->mcmember.sl, | |
246 | .ah_flags = IB_AH_GRH, | |
247 | .grh = { | |
248 | .flow_label = be32_to_cpu(mcast->mcmember.flow_label), | |
249 | .hop_limit = mcast->mcmember.hop_limit, | |
250 | .sgid_index = 0, | |
251 | .traffic_class = mcast->mcmember.traffic_class | |
252 | } | |
253 | }; | |
e6ded99c | 254 | int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate); |
1da177e4 LT |
255 | |
256 | av.grh.dgid = mcast->mcmember.mgid; | |
257 | ||
e6ded99c RD |
258 | if (path_rate > 0 && priv->local_rate > path_rate) |
259 | av.static_rate = (priv->local_rate - 1) / path_rate; | |
1da177e4 LT |
260 | |
261 | ipoib_dbg_mcast(priv, "static_rate %d for local port %dX, mcmember %dX\n", | |
262 | av.static_rate, priv->local_rate, | |
263 | ib_sa_rate_enum_to_int(mcast->mcmember.rate)); | |
264 | ||
265 | mcast->ah = ipoib_create_ah(dev, priv->pd, &av); | |
266 | if (!mcast->ah) { | |
267 | ipoib_warn(priv, "ib_address_create failed\n"); | |
268 | } else { | |
269 | ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT | |
270 | " AV %p, LID 0x%04x, SL %d\n", | |
271 | IPOIB_GID_ARG(mcast->mcmember.mgid), | |
272 | mcast->ah->ah, | |
273 | be16_to_cpu(mcast->mcmember.mlid), | |
274 | mcast->mcmember.sl); | |
275 | } | |
276 | } | |
277 | ||
278 | /* actually send any queued packets */ | |
279 | while (!skb_queue_empty(&mcast->pkt_queue)) { | |
280 | struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); | |
281 | ||
282 | skb->dev = dev; | |
283 | ||
284 | if (!skb->dst || !skb->dst->neighbour) { | |
285 | /* put pseudoheader back on for next time */ | |
286 | skb_push(skb, sizeof (struct ipoib_pseudoheader)); | |
287 | } | |
288 | ||
289 | if (dev_queue_xmit(skb)) | |
290 | ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); | |
291 | } | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | static void | |
297 | ipoib_mcast_sendonly_join_complete(int status, | |
298 | struct ib_sa_mcmember_rec *mcmember, | |
299 | void *mcast_ptr) | |
300 | { | |
301 | struct ipoib_mcast *mcast = mcast_ptr; | |
302 | struct net_device *dev = mcast->dev; | |
303 | ||
304 | if (!status) | |
305 | ipoib_mcast_join_finish(mcast, mcmember); | |
306 | else { | |
307 | if (mcast->logcount++ < 20) | |
308 | ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for " | |
309 | IPOIB_GID_FMT ", status %d\n", | |
310 | IPOIB_GID_ARG(mcast->mcmember.mgid), status); | |
311 | ||
312 | /* Flush out any queued packets */ | |
8c608a32 RD |
313 | while (!skb_queue_empty(&mcast->pkt_queue)) |
314 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); | |
1da177e4 LT |
315 | |
316 | /* Clear the busy flag so we try again */ | |
317 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
318 | } | |
319 | ||
320 | complete(&mcast->done); | |
321 | } | |
322 | ||
323 | static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast) | |
324 | { | |
325 | struct net_device *dev = mcast->dev; | |
326 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
327 | struct ib_sa_mcmember_rec rec = { | |
328 | #if 0 /* Some SMs don't support send-only yet */ | |
329 | .join_state = 4 | |
330 | #else | |
331 | .join_state = 1 | |
332 | #endif | |
333 | }; | |
334 | int ret = 0; | |
335 | ||
336 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { | |
337 | ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n"); | |
338 | return -ENODEV; | |
339 | } | |
340 | ||
341 | if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { | |
342 | ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n"); | |
343 | return -EBUSY; | |
344 | } | |
345 | ||
346 | rec.mgid = mcast->mcmember.mgid; | |
347 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 348 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 | 349 | |
de922487 MT |
350 | init_completion(&mcast->done); |
351 | ||
1da177e4 LT |
352 | ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, |
353 | IB_SA_MCMEMBER_REC_MGID | | |
354 | IB_SA_MCMEMBER_REC_PORT_GID | | |
355 | IB_SA_MCMEMBER_REC_PKEY | | |
356 | IB_SA_MCMEMBER_REC_JOIN_STATE, | |
357 | 1000, GFP_ATOMIC, | |
358 | ipoib_mcast_sendonly_join_complete, | |
359 | mcast, &mcast->query); | |
360 | if (ret < 0) { | |
361 | ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n", | |
362 | ret); | |
363 | } else { | |
364 | ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT | |
365 | ", starting join\n", | |
366 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
367 | ||
368 | mcast->query_id = ret; | |
369 | } | |
370 | ||
371 | return ret; | |
372 | } | |
373 | ||
374 | static void ipoib_mcast_join_complete(int status, | |
375 | struct ib_sa_mcmember_rec *mcmember, | |
376 | void *mcast_ptr) | |
377 | { | |
378 | struct ipoib_mcast *mcast = mcast_ptr; | |
379 | struct net_device *dev = mcast->dev; | |
380 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
381 | ||
382 | ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT | |
383 | " (status %d)\n", | |
384 | IPOIB_GID_ARG(mcast->mcmember.mgid), status); | |
385 | ||
386 | if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) { | |
ce5b65cc | 387 | mcast->backoff = 1; |
95ed644f | 388 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
389 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
390 | queue_work(ipoib_workqueue, &priv->mcast_task); | |
95ed644f | 391 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
392 | complete(&mcast->done); |
393 | return; | |
394 | } | |
395 | ||
396 | if (status == -EINTR) { | |
397 | complete(&mcast->done); | |
398 | return; | |
399 | } | |
400 | ||
401 | if (status && mcast->logcount++ < 20) { | |
402 | if (status == -ETIMEDOUT || status == -EINTR) { | |
403 | ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT | |
404 | ", status %d\n", | |
405 | IPOIB_GID_ARG(mcast->mcmember.mgid), | |
406 | status); | |
407 | } else { | |
408 | ipoib_warn(priv, "multicast join failed for " | |
409 | IPOIB_GID_FMT ", status %d\n", | |
410 | IPOIB_GID_ARG(mcast->mcmember.mgid), | |
411 | status); | |
412 | } | |
413 | } | |
414 | ||
415 | mcast->backoff *= 2; | |
416 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
417 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
418 | ||
419 | mcast->query = NULL; | |
420 | ||
95ed644f | 421 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
422 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) { |
423 | if (status == -ETIMEDOUT) | |
424 | queue_work(ipoib_workqueue, &priv->mcast_task); | |
425 | else | |
426 | queue_delayed_work(ipoib_workqueue, &priv->mcast_task, | |
427 | mcast->backoff * HZ); | |
428 | } else | |
429 | complete(&mcast->done); | |
95ed644f | 430 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
431 | |
432 | return; | |
433 | } | |
434 | ||
435 | static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast, | |
436 | int create) | |
437 | { | |
438 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
439 | struct ib_sa_mcmember_rec rec = { | |
440 | .join_state = 1 | |
441 | }; | |
442 | ib_sa_comp_mask comp_mask; | |
443 | int ret = 0; | |
444 | ||
445 | ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n", | |
446 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
447 | ||
448 | rec.mgid = mcast->mcmember.mgid; | |
449 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 450 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 LT |
451 | |
452 | comp_mask = | |
453 | IB_SA_MCMEMBER_REC_MGID | | |
454 | IB_SA_MCMEMBER_REC_PORT_GID | | |
455 | IB_SA_MCMEMBER_REC_PKEY | | |
456 | IB_SA_MCMEMBER_REC_JOIN_STATE; | |
457 | ||
458 | if (create) { | |
459 | comp_mask |= | |
460 | IB_SA_MCMEMBER_REC_QKEY | | |
461 | IB_SA_MCMEMBER_REC_SL | | |
462 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
463 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; | |
464 | ||
465 | rec.qkey = priv->broadcast->mcmember.qkey; | |
466 | rec.sl = priv->broadcast->mcmember.sl; | |
467 | rec.flow_label = priv->broadcast->mcmember.flow_label; | |
468 | rec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
469 | } | |
470 | ||
de922487 MT |
471 | init_completion(&mcast->done); |
472 | ||
1da177e4 LT |
473 | ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask, |
474 | mcast->backoff * 1000, GFP_ATOMIC, | |
475 | ipoib_mcast_join_complete, | |
476 | mcast, &mcast->query); | |
477 | ||
478 | if (ret < 0) { | |
479 | ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", ret); | |
480 | ||
481 | mcast->backoff *= 2; | |
482 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
483 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
484 | ||
95ed644f | 485 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
486 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
487 | queue_delayed_work(ipoib_workqueue, | |
488 | &priv->mcast_task, | |
ce5b65cc | 489 | mcast->backoff * HZ); |
95ed644f | 490 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
491 | } else |
492 | mcast->query_id = ret; | |
493 | } | |
494 | ||
495 | void ipoib_mcast_join_task(void *dev_ptr) | |
496 | { | |
497 | struct net_device *dev = dev_ptr; | |
498 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
499 | ||
500 | if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) | |
501 | return; | |
502 | ||
503 | if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid)) | |
504 | ipoib_warn(priv, "ib_gid_entry_get() failed\n"); | |
505 | else | |
506 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
507 | ||
508 | { | |
509 | struct ib_port_attr attr; | |
510 | ||
511 | if (!ib_query_port(priv->ca, priv->port, &attr)) { | |
512 | priv->local_lid = attr.lid; | |
513 | priv->local_rate = attr.active_speed * | |
514 | ib_width_enum_to_int(attr.active_width); | |
515 | } else | |
516 | ipoib_warn(priv, "ib_query_port failed\n"); | |
517 | } | |
518 | ||
519 | if (!priv->broadcast) { | |
520 | priv->broadcast = ipoib_mcast_alloc(dev, 1); | |
521 | if (!priv->broadcast) { | |
522 | ipoib_warn(priv, "failed to allocate broadcast group\n"); | |
95ed644f | 523 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
524 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
525 | queue_delayed_work(ipoib_workqueue, | |
526 | &priv->mcast_task, HZ); | |
95ed644f | 527 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
528 | return; |
529 | } | |
530 | ||
531 | memcpy(priv->broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, | |
532 | sizeof (union ib_gid)); | |
533 | ||
534 | spin_lock_irq(&priv->lock); | |
535 | __ipoib_mcast_add(dev, priv->broadcast); | |
536 | spin_unlock_irq(&priv->lock); | |
537 | } | |
538 | ||
539 | if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
540 | ipoib_mcast_join(dev, priv->broadcast, 0); | |
541 | return; | |
542 | } | |
543 | ||
544 | while (1) { | |
545 | struct ipoib_mcast *mcast = NULL; | |
546 | ||
547 | spin_lock_irq(&priv->lock); | |
548 | list_for_each_entry(mcast, &priv->multicast_list, list) { | |
549 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) | |
550 | && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) | |
551 | && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
552 | /* Found the next unjoined group */ | |
553 | break; | |
554 | } | |
555 | } | |
556 | spin_unlock_irq(&priv->lock); | |
557 | ||
558 | if (&mcast->list == &priv->multicast_list) { | |
559 | /* All done */ | |
560 | break; | |
561 | } | |
562 | ||
563 | ipoib_mcast_join(dev, mcast, 1); | |
564 | return; | |
565 | } | |
566 | ||
567 | priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) - | |
568 | IPOIB_ENCAP_LEN; | |
569 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
570 | ||
571 | ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n"); | |
572 | ||
573 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); | |
574 | netif_carrier_on(dev); | |
575 | } | |
576 | ||
577 | int ipoib_mcast_start_thread(struct net_device *dev) | |
578 | { | |
579 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
580 | ||
581 | ipoib_dbg_mcast(priv, "starting multicast thread\n"); | |
582 | ||
95ed644f | 583 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
584 | if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags)) |
585 | queue_work(ipoib_workqueue, &priv->mcast_task); | |
95ed644f | 586 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
587 | |
588 | return 0; | |
589 | } | |
590 | ||
8d2cae06 | 591 | int ipoib_mcast_stop_thread(struct net_device *dev, int flush) |
1da177e4 LT |
592 | { |
593 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
594 | struct ipoib_mcast *mcast; | |
595 | ||
596 | ipoib_dbg_mcast(priv, "stopping multicast thread\n"); | |
597 | ||
95ed644f | 598 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
599 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); |
600 | cancel_delayed_work(&priv->mcast_task); | |
95ed644f | 601 | mutex_unlock(&mcast_mutex); |
1da177e4 | 602 | |
8d2cae06 RD |
603 | if (flush) |
604 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
605 | |
606 | if (priv->broadcast && priv->broadcast->query) { | |
607 | ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query); | |
608 | priv->broadcast->query = NULL; | |
609 | ipoib_dbg_mcast(priv, "waiting for bcast\n"); | |
610 | wait_for_completion(&priv->broadcast->done); | |
611 | } | |
612 | ||
613 | list_for_each_entry(mcast, &priv->multicast_list, list) { | |
614 | if (mcast->query) { | |
615 | ib_sa_cancel_query(mcast->query_id, mcast->query); | |
616 | mcast->query = NULL; | |
617 | ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n", | |
618 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
619 | wait_for_completion(&mcast->done); | |
620 | } | |
621 | } | |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
626 | static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) | |
627 | { | |
628 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
629 | struct ib_sa_mcmember_rec rec = { | |
630 | .join_state = 1 | |
631 | }; | |
632 | int ret = 0; | |
633 | ||
634 | if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) | |
635 | return 0; | |
636 | ||
637 | ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n", | |
638 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
639 | ||
640 | rec.mgid = mcast->mcmember.mgid; | |
641 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 642 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 LT |
643 | |
644 | /* Remove ourselves from the multicast group */ | |
645 | ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid), | |
646 | &mcast->mcmember.mgid); | |
647 | if (ret) | |
648 | ipoib_warn(priv, "ipoib_mcast_detach failed (result = %d)\n", ret); | |
649 | ||
650 | /* | |
651 | * Just make one shot at leaving and don't wait for a reply; | |
652 | * if we fail, too bad. | |
653 | */ | |
654 | ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec, | |
655 | IB_SA_MCMEMBER_REC_MGID | | |
656 | IB_SA_MCMEMBER_REC_PORT_GID | | |
657 | IB_SA_MCMEMBER_REC_PKEY | | |
658 | IB_SA_MCMEMBER_REC_JOIN_STATE, | |
659 | 0, GFP_ATOMIC, NULL, | |
660 | mcast, &mcast->query); | |
661 | if (ret < 0) | |
662 | ipoib_warn(priv, "ib_sa_mcmember_rec_delete failed " | |
663 | "for leave (result = %d)\n", ret); | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, | |
669 | struct sk_buff *skb) | |
670 | { | |
671 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
672 | struct ipoib_mcast *mcast; | |
673 | ||
674 | /* | |
675 | * We can only be called from ipoib_start_xmit, so we're | |
676 | * inside tx_lock -- no need to save/restore flags. | |
677 | */ | |
678 | spin_lock(&priv->lock); | |
679 | ||
680 | mcast = __ipoib_mcast_find(dev, mgid); | |
681 | if (!mcast) { | |
682 | /* Let's create a new send only group now */ | |
683 | ipoib_dbg_mcast(priv, "setting up send only multicast group for " | |
684 | IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid)); | |
685 | ||
686 | mcast = ipoib_mcast_alloc(dev, 0); | |
687 | if (!mcast) { | |
688 | ipoib_warn(priv, "unable to allocate memory for " | |
689 | "multicast structure\n"); | |
690 | dev_kfree_skb_any(skb); | |
691 | goto out; | |
692 | } | |
693 | ||
694 | set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); | |
695 | mcast->mcmember.mgid = *mgid; | |
696 | __ipoib_mcast_add(dev, mcast); | |
697 | list_add_tail(&mcast->list, &priv->multicast_list); | |
698 | } | |
699 | ||
700 | if (!mcast->ah) { | |
701 | if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) | |
702 | skb_queue_tail(&mcast->pkt_queue, skb); | |
703 | else | |
704 | dev_kfree_skb_any(skb); | |
705 | ||
706 | if (mcast->query) | |
707 | ipoib_dbg_mcast(priv, "no address vector, " | |
708 | "but multicast join already started\n"); | |
709 | else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) | |
710 | ipoib_mcast_sendonly_join(mcast); | |
711 | ||
712 | /* | |
713 | * If lookup completes between here and out:, don't | |
714 | * want to send packet twice. | |
715 | */ | |
716 | mcast = NULL; | |
717 | } | |
718 | ||
719 | out: | |
720 | if (mcast && mcast->ah) { | |
721 | if (skb->dst && | |
722 | skb->dst->neighbour && | |
723 | !*to_ipoib_neigh(skb->dst->neighbour)) { | |
724 | struct ipoib_neigh *neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
725 | ||
726 | if (neigh) { | |
727 | kref_get(&mcast->ah->ref); | |
728 | neigh->ah = mcast->ah; | |
729 | neigh->neighbour = skb->dst->neighbour; | |
730 | *to_ipoib_neigh(skb->dst->neighbour) = neigh; | |
731 | list_add_tail(&neigh->list, &mcast->neigh_list); | |
732 | } | |
733 | } | |
734 | ||
735 | ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); | |
736 | } | |
737 | ||
738 | spin_unlock(&priv->lock); | |
739 | } | |
740 | ||
741 | void ipoib_mcast_dev_flush(struct net_device *dev) | |
742 | { | |
743 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
744 | LIST_HEAD(remove_list); | |
988bd503 | 745 | struct ipoib_mcast *mcast, *tmcast; |
1da177e4 LT |
746 | unsigned long flags; |
747 | ||
748 | ipoib_dbg_mcast(priv, "flushing multicast list\n"); | |
749 | ||
750 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 751 | |
988bd503 EC |
752 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { |
753 | list_del(&mcast->list); | |
754 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
755 | list_add_tail(&mcast->list, &remove_list); | |
1da177e4 LT |
756 | } |
757 | ||
758 | if (priv->broadcast) { | |
988bd503 EC |
759 | rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); |
760 | list_add_tail(&priv->broadcast->list, &remove_list); | |
761 | priv->broadcast = NULL; | |
1da177e4 LT |
762 | } |
763 | ||
764 | spin_unlock_irqrestore(&priv->lock, flags); | |
765 | ||
766 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { | |
767 | ipoib_mcast_leave(dev, mcast); | |
768 | ipoib_mcast_free(mcast); | |
769 | } | |
770 | } | |
771 | ||
1da177e4 LT |
772 | void ipoib_mcast_restart_task(void *dev_ptr) |
773 | { | |
774 | struct net_device *dev = dev_ptr; | |
775 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
776 | struct dev_mc_list *mclist; | |
777 | struct ipoib_mcast *mcast, *tmcast; | |
778 | LIST_HEAD(remove_list); | |
779 | unsigned long flags; | |
780 | ||
781 | ipoib_dbg_mcast(priv, "restarting multicast task\n"); | |
782 | ||
8d2cae06 | 783 | ipoib_mcast_stop_thread(dev, 0); |
1da177e4 | 784 | |
78bfe0b5 MT |
785 | spin_lock_irqsave(&dev->xmit_lock, flags); |
786 | spin_lock(&priv->lock); | |
1da177e4 LT |
787 | |
788 | /* | |
789 | * Unfortunately, the networking core only gives us a list of all of | |
790 | * the multicast hardware addresses. We need to figure out which ones | |
791 | * are new and which ones have been removed | |
792 | */ | |
793 | ||
794 | /* Clear out the found flag */ | |
795 | list_for_each_entry(mcast, &priv->multicast_list, list) | |
796 | clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
797 | ||
798 | /* Mark all of the entries that are found or don't exist */ | |
799 | for (mclist = dev->mc_list; mclist; mclist = mclist->next) { | |
800 | union ib_gid mgid; | |
801 | ||
802 | memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid); | |
803 | ||
804 | /* Add in the P_Key */ | |
805 | mgid.raw[4] = (priv->pkey >> 8) & 0xff; | |
806 | mgid.raw[5] = priv->pkey & 0xff; | |
807 | ||
808 | mcast = __ipoib_mcast_find(dev, &mgid); | |
809 | if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
810 | struct ipoib_mcast *nmcast; | |
811 | ||
812 | /* Not found or send-only group, let's add a new entry */ | |
813 | ipoib_dbg_mcast(priv, "adding multicast entry for mgid " | |
814 | IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid)); | |
815 | ||
816 | nmcast = ipoib_mcast_alloc(dev, 0); | |
817 | if (!nmcast) { | |
818 | ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); | |
819 | continue; | |
820 | } | |
821 | ||
822 | set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); | |
823 | ||
824 | nmcast->mcmember.mgid = mgid; | |
825 | ||
826 | if (mcast) { | |
827 | /* Destroy the send only entry */ | |
828 | list_del(&mcast->list); | |
829 | list_add_tail(&mcast->list, &remove_list); | |
830 | ||
831 | rb_replace_node(&mcast->rb_node, | |
832 | &nmcast->rb_node, | |
833 | &priv->multicast_tree); | |
834 | } else | |
835 | __ipoib_mcast_add(dev, nmcast); | |
836 | ||
837 | list_add_tail(&nmcast->list, &priv->multicast_list); | |
838 | } | |
839 | ||
840 | if (mcast) | |
841 | set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
842 | } | |
843 | ||
844 | /* Remove all of the entries don't exist anymore */ | |
845 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { | |
846 | if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && | |
847 | !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
848 | ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n", | |
849 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
850 | ||
851 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
852 | ||
853 | /* Move to the remove list */ | |
854 | list_del(&mcast->list); | |
855 | list_add_tail(&mcast->list, &remove_list); | |
856 | } | |
857 | } | |
78bfe0b5 MT |
858 | |
859 | spin_unlock(&priv->lock); | |
860 | spin_unlock_irqrestore(&dev->xmit_lock, flags); | |
1da177e4 LT |
861 | |
862 | /* We have to cancel outside of the spinlock */ | |
863 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { | |
864 | ipoib_mcast_leave(mcast->dev, mcast); | |
865 | ipoib_mcast_free(mcast); | |
866 | } | |
867 | ||
868 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
869 | ipoib_mcast_start_thread(dev); | |
870 | } | |
871 | ||
8ae5a8a2 RD |
872 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
873 | ||
1da177e4 LT |
874 | struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev) |
875 | { | |
876 | struct ipoib_mcast_iter *iter; | |
877 | ||
878 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
879 | if (!iter) | |
880 | return NULL; | |
881 | ||
882 | iter->dev = dev; | |
1732b0ef | 883 | memset(iter->mgid.raw, 0, 16); |
1da177e4 LT |
884 | |
885 | if (ipoib_mcast_iter_next(iter)) { | |
1732b0ef | 886 | kfree(iter); |
1da177e4 LT |
887 | return NULL; |
888 | } | |
889 | ||
890 | return iter; | |
891 | } | |
892 | ||
1da177e4 LT |
893 | int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) |
894 | { | |
895 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
896 | struct rb_node *n; | |
897 | struct ipoib_mcast *mcast; | |
898 | int ret = 1; | |
899 | ||
900 | spin_lock_irq(&priv->lock); | |
901 | ||
902 | n = rb_first(&priv->multicast_tree); | |
903 | ||
904 | while (n) { | |
905 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
906 | ||
907 | if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, | |
908 | sizeof (union ib_gid)) < 0) { | |
909 | iter->mgid = mcast->mcmember.mgid; | |
910 | iter->created = mcast->created; | |
911 | iter->queuelen = skb_queue_len(&mcast->pkt_queue); | |
912 | iter->complete = !!mcast->ah; | |
913 | iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); | |
914 | ||
915 | ret = 0; | |
916 | ||
917 | break; | |
918 | } | |
919 | ||
920 | n = rb_next(n); | |
921 | } | |
922 | ||
923 | spin_unlock_irq(&priv->lock); | |
924 | ||
925 | return ret; | |
926 | } | |
927 | ||
928 | void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, | |
929 | union ib_gid *mgid, | |
930 | unsigned long *created, | |
931 | unsigned int *queuelen, | |
932 | unsigned int *complete, | |
933 | unsigned int *send_only) | |
934 | { | |
935 | *mgid = iter->mgid; | |
936 | *created = iter->created; | |
937 | *queuelen = iter->queuelen; | |
938 | *complete = iter->complete; | |
939 | *send_only = iter->send_only; | |
940 | } | |
8ae5a8a2 RD |
941 | |
942 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ |