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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; | |
b36f170b | 100 | int tx_dropped = 0; |
1da177e4 LT |
101 | |
102 | ipoib_dbg_mcast(netdev_priv(dev), | |
103 | "deleting multicast group " IPOIB_GID_FMT "\n", | |
104 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
105 | ||
106 | spin_lock_irqsave(&priv->lock, flags); | |
107 | ||
108 | list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) { | |
97460df3 EC |
109 | /* |
110 | * It's safe to call ipoib_put_ah() inside priv->lock | |
111 | * here, because we know that mcast->ah will always | |
112 | * hold one more reference, so ipoib_put_ah() will | |
113 | * never do more than decrement the ref count. | |
114 | */ | |
1da177e4 | 115 | if (neigh->ah) |
97460df3 | 116 | ipoib_put_ah(neigh->ah); |
1da177e4 LT |
117 | *to_ipoib_neigh(neigh->neighbour) = NULL; |
118 | neigh->neighbour->ops->destructor = NULL; | |
119 | kfree(neigh); | |
120 | } | |
121 | ||
122 | spin_unlock_irqrestore(&priv->lock, flags); | |
123 | ||
1da177e4 LT |
124 | if (mcast->ah) |
125 | ipoib_put_ah(mcast->ah); | |
126 | ||
b36f170b MT |
127 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
128 | ++tx_dropped; | |
8c608a32 | 129 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
b36f170b MT |
130 | } |
131 | ||
132 | spin_lock_irqsave(&priv->tx_lock, flags); | |
133 | priv->stats.tx_dropped += tx_dropped; | |
134 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
1da177e4 LT |
135 | |
136 | kfree(mcast); | |
137 | } | |
138 | ||
139 | static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, | |
140 | int can_sleep) | |
141 | { | |
142 | struct ipoib_mcast *mcast; | |
143 | ||
de6eb66b | 144 | mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC); |
1da177e4 LT |
145 | if (!mcast) |
146 | return NULL; | |
147 | ||
1da177e4 LT |
148 | mcast->dev = dev; |
149 | mcast->created = jiffies; | |
ce5b65cc | 150 | mcast->backoff = 1; |
1da177e4 LT |
151 | |
152 | INIT_LIST_HEAD(&mcast->list); | |
153 | INIT_LIST_HEAD(&mcast->neigh_list); | |
154 | skb_queue_head_init(&mcast->pkt_queue); | |
155 | ||
1da177e4 LT |
156 | return mcast; |
157 | } | |
158 | ||
159 | static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_gid *mgid) | |
160 | { | |
161 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
162 | struct rb_node *n = priv->multicast_tree.rb_node; | |
163 | ||
164 | while (n) { | |
165 | struct ipoib_mcast *mcast; | |
166 | int ret; | |
167 | ||
168 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
169 | ||
170 | ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw, | |
171 | sizeof (union ib_gid)); | |
172 | if (ret < 0) | |
173 | n = n->rb_left; | |
174 | else if (ret > 0) | |
175 | n = n->rb_right; | |
176 | else | |
177 | return mcast; | |
178 | } | |
179 | ||
180 | return NULL; | |
181 | } | |
182 | ||
183 | static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) | |
184 | { | |
185 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
186 | struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; | |
187 | ||
188 | while (*n) { | |
189 | struct ipoib_mcast *tmcast; | |
190 | int ret; | |
191 | ||
192 | pn = *n; | |
193 | tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); | |
194 | ||
195 | ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw, | |
196 | sizeof (union ib_gid)); | |
197 | if (ret < 0) | |
198 | n = &pn->rb_left; | |
199 | else if (ret > 0) | |
200 | n = &pn->rb_right; | |
201 | else | |
202 | return -EEXIST; | |
203 | } | |
204 | ||
205 | rb_link_node(&mcast->rb_node, pn, n); | |
206 | rb_insert_color(&mcast->rb_node, &priv->multicast_tree); | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
211 | static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, | |
212 | struct ib_sa_mcmember_rec *mcmember) | |
213 | { | |
214 | struct net_device *dev = mcast->dev; | |
215 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
7343b231 | 216 | struct ipoib_ah *ah; |
1da177e4 LT |
217 | int ret; |
218 | ||
219 | mcast->mcmember = *mcmember; | |
220 | ||
221 | /* Set the cached Q_Key before we attach if it's the broadcast group */ | |
222 | if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4, | |
223 | sizeof (union ib_gid))) { | |
224 | priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); | |
225 | priv->tx_wr.wr.ud.remote_qkey = priv->qkey; | |
226 | } | |
227 | ||
228 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
229 | if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
230 | ipoib_warn(priv, "multicast group " IPOIB_GID_FMT | |
231 | " already attached\n", | |
232 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid), | |
238 | &mcast->mcmember.mgid); | |
239 | if (ret < 0) { | |
240 | ipoib_warn(priv, "couldn't attach QP to multicast group " | |
241 | IPOIB_GID_FMT "\n", | |
242 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
243 | ||
244 | clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); | |
245 | return ret; | |
246 | } | |
247 | } | |
248 | ||
249 | { | |
250 | struct ib_ah_attr av = { | |
251 | .dlid = be16_to_cpu(mcast->mcmember.mlid), | |
252 | .port_num = priv->port, | |
253 | .sl = mcast->mcmember.sl, | |
254 | .ah_flags = IB_AH_GRH, | |
255 | .grh = { | |
256 | .flow_label = be32_to_cpu(mcast->mcmember.flow_label), | |
257 | .hop_limit = mcast->mcmember.hop_limit, | |
258 | .sgid_index = 0, | |
259 | .traffic_class = mcast->mcmember.traffic_class | |
260 | } | |
261 | }; | |
e6ded99c | 262 | int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate); |
1da177e4 LT |
263 | |
264 | av.grh.dgid = mcast->mcmember.mgid; | |
265 | ||
e6ded99c RD |
266 | if (path_rate > 0 && priv->local_rate > path_rate) |
267 | av.static_rate = (priv->local_rate - 1) / path_rate; | |
1da177e4 LT |
268 | |
269 | ipoib_dbg_mcast(priv, "static_rate %d for local port %dX, mcmember %dX\n", | |
270 | av.static_rate, priv->local_rate, | |
271 | ib_sa_rate_enum_to_int(mcast->mcmember.rate)); | |
272 | ||
7343b231 EC |
273 | ah = ipoib_create_ah(dev, priv->pd, &av); |
274 | if (!ah) { | |
1da177e4 LT |
275 | ipoib_warn(priv, "ib_address_create failed\n"); |
276 | } else { | |
277 | ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT | |
278 | " AV %p, LID 0x%04x, SL %d\n", | |
279 | IPOIB_GID_ARG(mcast->mcmember.mgid), | |
280 | mcast->ah->ah, | |
281 | be16_to_cpu(mcast->mcmember.mlid), | |
282 | mcast->mcmember.sl); | |
283 | } | |
7343b231 EC |
284 | |
285 | spin_lock_irq(&priv->lock); | |
286 | mcast->ah = ah; | |
287 | spin_unlock_irq(&priv->lock); | |
1da177e4 LT |
288 | } |
289 | ||
290 | /* actually send any queued packets */ | |
b36f170b | 291 | spin_lock_irq(&priv->tx_lock); |
1da177e4 LT |
292 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
293 | struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); | |
b36f170b | 294 | spin_unlock_irq(&priv->tx_lock); |
1da177e4 LT |
295 | |
296 | skb->dev = dev; | |
297 | ||
298 | if (!skb->dst || !skb->dst->neighbour) { | |
299 | /* put pseudoheader back on for next time */ | |
300 | skb_push(skb, sizeof (struct ipoib_pseudoheader)); | |
301 | } | |
302 | ||
303 | if (dev_queue_xmit(skb)) | |
304 | ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); | |
b36f170b | 305 | spin_lock_irq(&priv->tx_lock); |
1da177e4 | 306 | } |
b36f170b | 307 | spin_unlock_irq(&priv->tx_lock); |
1da177e4 LT |
308 | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static void | |
313 | ipoib_mcast_sendonly_join_complete(int status, | |
314 | struct ib_sa_mcmember_rec *mcmember, | |
315 | void *mcast_ptr) | |
316 | { | |
317 | struct ipoib_mcast *mcast = mcast_ptr; | |
318 | struct net_device *dev = mcast->dev; | |
b36f170b | 319 | struct ipoib_dev_priv *priv = netdev_priv(dev); |
1da177e4 LT |
320 | |
321 | if (!status) | |
322 | ipoib_mcast_join_finish(mcast, mcmember); | |
323 | else { | |
324 | if (mcast->logcount++ < 20) | |
325 | ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for " | |
326 | IPOIB_GID_FMT ", status %d\n", | |
327 | IPOIB_GID_ARG(mcast->mcmember.mgid), status); | |
328 | ||
329 | /* Flush out any queued packets */ | |
b36f170b MT |
330 | spin_lock_irq(&priv->tx_lock); |
331 | while (!skb_queue_empty(&mcast->pkt_queue)) { | |
332 | ++priv->stats.tx_dropped; | |
8c608a32 | 333 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
b36f170b MT |
334 | } |
335 | spin_unlock_irq(&priv->tx_lock); | |
1da177e4 LT |
336 | |
337 | /* Clear the busy flag so we try again */ | |
338 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
339 | } | |
340 | ||
341 | complete(&mcast->done); | |
342 | } | |
343 | ||
344 | static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast) | |
345 | { | |
346 | struct net_device *dev = mcast->dev; | |
347 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
348 | struct ib_sa_mcmember_rec rec = { | |
349 | #if 0 /* Some SMs don't support send-only yet */ | |
350 | .join_state = 4 | |
351 | #else | |
352 | .join_state = 1 | |
353 | #endif | |
354 | }; | |
355 | int ret = 0; | |
356 | ||
357 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { | |
358 | ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n"); | |
359 | return -ENODEV; | |
360 | } | |
361 | ||
362 | if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { | |
363 | ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n"); | |
364 | return -EBUSY; | |
365 | } | |
366 | ||
367 | rec.mgid = mcast->mcmember.mgid; | |
368 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 369 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 | 370 | |
de922487 MT |
371 | init_completion(&mcast->done); |
372 | ||
1da177e4 LT |
373 | ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, |
374 | IB_SA_MCMEMBER_REC_MGID | | |
375 | IB_SA_MCMEMBER_REC_PORT_GID | | |
376 | IB_SA_MCMEMBER_REC_PKEY | | |
377 | IB_SA_MCMEMBER_REC_JOIN_STATE, | |
378 | 1000, GFP_ATOMIC, | |
379 | ipoib_mcast_sendonly_join_complete, | |
380 | mcast, &mcast->query); | |
381 | if (ret < 0) { | |
382 | ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n", | |
383 | ret); | |
384 | } else { | |
385 | ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT | |
386 | ", starting join\n", | |
387 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
388 | ||
389 | mcast->query_id = ret; | |
390 | } | |
391 | ||
392 | return ret; | |
393 | } | |
394 | ||
395 | static void ipoib_mcast_join_complete(int status, | |
396 | struct ib_sa_mcmember_rec *mcmember, | |
397 | void *mcast_ptr) | |
398 | { | |
399 | struct ipoib_mcast *mcast = mcast_ptr; | |
400 | struct net_device *dev = mcast->dev; | |
401 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
402 | ||
403 | ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT | |
404 | " (status %d)\n", | |
405 | IPOIB_GID_ARG(mcast->mcmember.mgid), status); | |
406 | ||
407 | if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) { | |
ce5b65cc | 408 | mcast->backoff = 1; |
95ed644f | 409 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
410 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
411 | queue_work(ipoib_workqueue, &priv->mcast_task); | |
95ed644f | 412 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
413 | complete(&mcast->done); |
414 | return; | |
415 | } | |
416 | ||
417 | if (status == -EINTR) { | |
418 | complete(&mcast->done); | |
419 | return; | |
420 | } | |
421 | ||
422 | if (status && mcast->logcount++ < 20) { | |
423 | if (status == -ETIMEDOUT || status == -EINTR) { | |
424 | ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT | |
425 | ", status %d\n", | |
426 | IPOIB_GID_ARG(mcast->mcmember.mgid), | |
427 | status); | |
428 | } else { | |
429 | ipoib_warn(priv, "multicast join failed for " | |
430 | IPOIB_GID_FMT ", status %d\n", | |
431 | IPOIB_GID_ARG(mcast->mcmember.mgid), | |
432 | status); | |
433 | } | |
434 | } | |
435 | ||
436 | mcast->backoff *= 2; | |
437 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
438 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
439 | ||
440 | mcast->query = NULL; | |
441 | ||
95ed644f | 442 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
443 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) { |
444 | if (status == -ETIMEDOUT) | |
445 | queue_work(ipoib_workqueue, &priv->mcast_task); | |
446 | else | |
447 | queue_delayed_work(ipoib_workqueue, &priv->mcast_task, | |
448 | mcast->backoff * HZ); | |
449 | } else | |
450 | complete(&mcast->done); | |
95ed644f | 451 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
452 | |
453 | return; | |
454 | } | |
455 | ||
456 | static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast, | |
457 | int create) | |
458 | { | |
459 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
460 | struct ib_sa_mcmember_rec rec = { | |
461 | .join_state = 1 | |
462 | }; | |
463 | ib_sa_comp_mask comp_mask; | |
464 | int ret = 0; | |
465 | ||
466 | ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n", | |
467 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
468 | ||
469 | rec.mgid = mcast->mcmember.mgid; | |
470 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 471 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 LT |
472 | |
473 | comp_mask = | |
474 | IB_SA_MCMEMBER_REC_MGID | | |
475 | IB_SA_MCMEMBER_REC_PORT_GID | | |
476 | IB_SA_MCMEMBER_REC_PKEY | | |
477 | IB_SA_MCMEMBER_REC_JOIN_STATE; | |
478 | ||
479 | if (create) { | |
480 | comp_mask |= | |
481 | IB_SA_MCMEMBER_REC_QKEY | | |
482 | IB_SA_MCMEMBER_REC_SL | | |
483 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
484 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; | |
485 | ||
486 | rec.qkey = priv->broadcast->mcmember.qkey; | |
487 | rec.sl = priv->broadcast->mcmember.sl; | |
488 | rec.flow_label = priv->broadcast->mcmember.flow_label; | |
489 | rec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
490 | } | |
491 | ||
de922487 MT |
492 | init_completion(&mcast->done); |
493 | ||
1da177e4 LT |
494 | ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask, |
495 | mcast->backoff * 1000, GFP_ATOMIC, | |
496 | ipoib_mcast_join_complete, | |
497 | mcast, &mcast->query); | |
498 | ||
499 | if (ret < 0) { | |
500 | ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", ret); | |
501 | ||
502 | mcast->backoff *= 2; | |
503 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
504 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
505 | ||
95ed644f | 506 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
507 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
508 | queue_delayed_work(ipoib_workqueue, | |
509 | &priv->mcast_task, | |
ce5b65cc | 510 | mcast->backoff * HZ); |
95ed644f | 511 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
512 | } else |
513 | mcast->query_id = ret; | |
514 | } | |
515 | ||
516 | void ipoib_mcast_join_task(void *dev_ptr) | |
517 | { | |
518 | struct net_device *dev = dev_ptr; | |
519 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
520 | ||
521 | if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) | |
522 | return; | |
523 | ||
524 | if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid)) | |
525 | ipoib_warn(priv, "ib_gid_entry_get() failed\n"); | |
526 | else | |
527 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
528 | ||
529 | { | |
530 | struct ib_port_attr attr; | |
531 | ||
532 | if (!ib_query_port(priv->ca, priv->port, &attr)) { | |
533 | priv->local_lid = attr.lid; | |
534 | priv->local_rate = attr.active_speed * | |
535 | ib_width_enum_to_int(attr.active_width); | |
536 | } else | |
537 | ipoib_warn(priv, "ib_query_port failed\n"); | |
538 | } | |
539 | ||
540 | if (!priv->broadcast) { | |
20b83382 RD |
541 | struct ipoib_mcast *broadcast; |
542 | ||
543 | broadcast = ipoib_mcast_alloc(dev, 1); | |
544 | if (!broadcast) { | |
1da177e4 | 545 | ipoib_warn(priv, "failed to allocate broadcast group\n"); |
95ed644f | 546 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
547 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
548 | queue_delayed_work(ipoib_workqueue, | |
549 | &priv->mcast_task, HZ); | |
95ed644f | 550 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
551 | return; |
552 | } | |
553 | ||
20b83382 RD |
554 | spin_lock_irq(&priv->lock); |
555 | memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, | |
1da177e4 | 556 | sizeof (union ib_gid)); |
20b83382 | 557 | priv->broadcast = broadcast; |
1da177e4 | 558 | |
1da177e4 LT |
559 | __ipoib_mcast_add(dev, priv->broadcast); |
560 | spin_unlock_irq(&priv->lock); | |
561 | } | |
562 | ||
563 | if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
564 | ipoib_mcast_join(dev, priv->broadcast, 0); | |
565 | return; | |
566 | } | |
567 | ||
568 | while (1) { | |
569 | struct ipoib_mcast *mcast = NULL; | |
570 | ||
571 | spin_lock_irq(&priv->lock); | |
572 | list_for_each_entry(mcast, &priv->multicast_list, list) { | |
573 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) | |
574 | && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) | |
575 | && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
576 | /* Found the next unjoined group */ | |
577 | break; | |
578 | } | |
579 | } | |
580 | spin_unlock_irq(&priv->lock); | |
581 | ||
582 | if (&mcast->list == &priv->multicast_list) { | |
583 | /* All done */ | |
584 | break; | |
585 | } | |
586 | ||
587 | ipoib_mcast_join(dev, mcast, 1); | |
588 | return; | |
589 | } | |
590 | ||
591 | priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) - | |
592 | IPOIB_ENCAP_LEN; | |
593 | dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); | |
594 | ||
595 | ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n"); | |
596 | ||
597 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); | |
598 | netif_carrier_on(dev); | |
599 | } | |
600 | ||
601 | int ipoib_mcast_start_thread(struct net_device *dev) | |
602 | { | |
603 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
604 | ||
605 | ipoib_dbg_mcast(priv, "starting multicast thread\n"); | |
606 | ||
95ed644f | 607 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
608 | if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags)) |
609 | queue_work(ipoib_workqueue, &priv->mcast_task); | |
95ed644f | 610 | mutex_unlock(&mcast_mutex); |
1da177e4 | 611 | |
479a0796 MT |
612 | spin_lock_irq(&priv->lock); |
613 | set_bit(IPOIB_MCAST_STARTED, &priv->flags); | |
614 | spin_unlock_irq(&priv->lock); | |
615 | ||
1da177e4 LT |
616 | return 0; |
617 | } | |
618 | ||
8d2cae06 | 619 | int ipoib_mcast_stop_thread(struct net_device *dev, int flush) |
1da177e4 LT |
620 | { |
621 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
622 | struct ipoib_mcast *mcast; | |
623 | ||
624 | ipoib_dbg_mcast(priv, "stopping multicast thread\n"); | |
625 | ||
479a0796 MT |
626 | spin_lock_irq(&priv->lock); |
627 | clear_bit(IPOIB_MCAST_STARTED, &priv->flags); | |
628 | spin_unlock_irq(&priv->lock); | |
629 | ||
95ed644f | 630 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
631 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); |
632 | cancel_delayed_work(&priv->mcast_task); | |
95ed644f | 633 | mutex_unlock(&mcast_mutex); |
1da177e4 | 634 | |
8d2cae06 RD |
635 | if (flush) |
636 | flush_workqueue(ipoib_workqueue); | |
1da177e4 LT |
637 | |
638 | if (priv->broadcast && priv->broadcast->query) { | |
639 | ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query); | |
640 | priv->broadcast->query = NULL; | |
641 | ipoib_dbg_mcast(priv, "waiting for bcast\n"); | |
642 | wait_for_completion(&priv->broadcast->done); | |
643 | } | |
644 | ||
645 | list_for_each_entry(mcast, &priv->multicast_list, list) { | |
646 | if (mcast->query) { | |
647 | ib_sa_cancel_query(mcast->query_id, mcast->query); | |
648 | mcast->query = NULL; | |
649 | ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n", | |
650 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
651 | wait_for_completion(&mcast->done); | |
652 | } | |
653 | } | |
654 | ||
655 | return 0; | |
656 | } | |
657 | ||
658 | static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) | |
659 | { | |
660 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
661 | struct ib_sa_mcmember_rec rec = { | |
662 | .join_state = 1 | |
663 | }; | |
664 | int ret = 0; | |
665 | ||
666 | if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) | |
667 | return 0; | |
668 | ||
669 | ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n", | |
670 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
671 | ||
672 | rec.mgid = mcast->mcmember.mgid; | |
673 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 674 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 LT |
675 | |
676 | /* Remove ourselves from the multicast group */ | |
677 | ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid), | |
678 | &mcast->mcmember.mgid); | |
679 | if (ret) | |
680 | ipoib_warn(priv, "ipoib_mcast_detach failed (result = %d)\n", ret); | |
681 | ||
682 | /* | |
683 | * Just make one shot at leaving and don't wait for a reply; | |
684 | * if we fail, too bad. | |
685 | */ | |
686 | ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec, | |
687 | IB_SA_MCMEMBER_REC_MGID | | |
688 | IB_SA_MCMEMBER_REC_PORT_GID | | |
689 | IB_SA_MCMEMBER_REC_PKEY | | |
690 | IB_SA_MCMEMBER_REC_JOIN_STATE, | |
691 | 0, GFP_ATOMIC, NULL, | |
692 | mcast, &mcast->query); | |
693 | if (ret < 0) | |
694 | ipoib_warn(priv, "ib_sa_mcmember_rec_delete failed " | |
695 | "for leave (result = %d)\n", ret); | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, | |
701 | struct sk_buff *skb) | |
702 | { | |
703 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
704 | struct ipoib_mcast *mcast; | |
705 | ||
706 | /* | |
707 | * We can only be called from ipoib_start_xmit, so we're | |
708 | * inside tx_lock -- no need to save/restore flags. | |
709 | */ | |
710 | spin_lock(&priv->lock); | |
711 | ||
20b83382 RD |
712 | if (!test_bit(IPOIB_MCAST_STARTED, &priv->flags) || |
713 | !priv->broadcast || | |
714 | !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
479a0796 MT |
715 | ++priv->stats.tx_dropped; |
716 | dev_kfree_skb_any(skb); | |
717 | goto unlock; | |
718 | } | |
719 | ||
1da177e4 LT |
720 | mcast = __ipoib_mcast_find(dev, mgid); |
721 | if (!mcast) { | |
722 | /* Let's create a new send only group now */ | |
723 | ipoib_dbg_mcast(priv, "setting up send only multicast group for " | |
724 | IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid)); | |
725 | ||
726 | mcast = ipoib_mcast_alloc(dev, 0); | |
727 | if (!mcast) { | |
728 | ipoib_warn(priv, "unable to allocate memory for " | |
729 | "multicast structure\n"); | |
b36f170b | 730 | ++priv->stats.tx_dropped; |
1da177e4 LT |
731 | dev_kfree_skb_any(skb); |
732 | goto out; | |
733 | } | |
734 | ||
735 | set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); | |
736 | mcast->mcmember.mgid = *mgid; | |
737 | __ipoib_mcast_add(dev, mcast); | |
738 | list_add_tail(&mcast->list, &priv->multicast_list); | |
739 | } | |
740 | ||
741 | if (!mcast->ah) { | |
742 | if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) | |
743 | skb_queue_tail(&mcast->pkt_queue, skb); | |
b36f170b MT |
744 | else { |
745 | ++priv->stats.tx_dropped; | |
1da177e4 | 746 | dev_kfree_skb_any(skb); |
b36f170b | 747 | } |
1da177e4 LT |
748 | |
749 | if (mcast->query) | |
750 | ipoib_dbg_mcast(priv, "no address vector, " | |
751 | "but multicast join already started\n"); | |
752 | else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) | |
753 | ipoib_mcast_sendonly_join(mcast); | |
754 | ||
755 | /* | |
756 | * If lookup completes between here and out:, don't | |
757 | * want to send packet twice. | |
758 | */ | |
759 | mcast = NULL; | |
760 | } | |
761 | ||
762 | out: | |
763 | if (mcast && mcast->ah) { | |
764 | if (skb->dst && | |
765 | skb->dst->neighbour && | |
766 | !*to_ipoib_neigh(skb->dst->neighbour)) { | |
767 | struct ipoib_neigh *neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); | |
768 | ||
769 | if (neigh) { | |
770 | kref_get(&mcast->ah->ref); | |
771 | neigh->ah = mcast->ah; | |
772 | neigh->neighbour = skb->dst->neighbour; | |
773 | *to_ipoib_neigh(skb->dst->neighbour) = neigh; | |
774 | list_add_tail(&neigh->list, &mcast->neigh_list); | |
775 | } | |
776 | } | |
777 | ||
778 | ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); | |
779 | } | |
780 | ||
479a0796 | 781 | unlock: |
1da177e4 LT |
782 | spin_unlock(&priv->lock); |
783 | } | |
784 | ||
785 | void ipoib_mcast_dev_flush(struct net_device *dev) | |
786 | { | |
787 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
788 | LIST_HEAD(remove_list); | |
988bd503 | 789 | struct ipoib_mcast *mcast, *tmcast; |
1da177e4 LT |
790 | unsigned long flags; |
791 | ||
792 | ipoib_dbg_mcast(priv, "flushing multicast list\n"); | |
793 | ||
794 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 795 | |
988bd503 EC |
796 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { |
797 | list_del(&mcast->list); | |
798 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
799 | list_add_tail(&mcast->list, &remove_list); | |
1da177e4 LT |
800 | } |
801 | ||
802 | if (priv->broadcast) { | |
988bd503 EC |
803 | rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); |
804 | list_add_tail(&priv->broadcast->list, &remove_list); | |
805 | priv->broadcast = NULL; | |
1da177e4 LT |
806 | } |
807 | ||
808 | spin_unlock_irqrestore(&priv->lock, flags); | |
809 | ||
810 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { | |
811 | ipoib_mcast_leave(dev, mcast); | |
812 | ipoib_mcast_free(mcast); | |
813 | } | |
814 | } | |
815 | ||
1da177e4 LT |
816 | void ipoib_mcast_restart_task(void *dev_ptr) |
817 | { | |
818 | struct net_device *dev = dev_ptr; | |
819 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
820 | struct dev_mc_list *mclist; | |
821 | struct ipoib_mcast *mcast, *tmcast; | |
822 | LIST_HEAD(remove_list); | |
823 | unsigned long flags; | |
824 | ||
825 | ipoib_dbg_mcast(priv, "restarting multicast task\n"); | |
826 | ||
8d2cae06 | 827 | ipoib_mcast_stop_thread(dev, 0); |
1da177e4 | 828 | |
78bfe0b5 MT |
829 | spin_lock_irqsave(&dev->xmit_lock, flags); |
830 | spin_lock(&priv->lock); | |
1da177e4 LT |
831 | |
832 | /* | |
833 | * Unfortunately, the networking core only gives us a list of all of | |
834 | * the multicast hardware addresses. We need to figure out which ones | |
835 | * are new and which ones have been removed | |
836 | */ | |
837 | ||
838 | /* Clear out the found flag */ | |
839 | list_for_each_entry(mcast, &priv->multicast_list, list) | |
840 | clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
841 | ||
842 | /* Mark all of the entries that are found or don't exist */ | |
843 | for (mclist = dev->mc_list; mclist; mclist = mclist->next) { | |
844 | union ib_gid mgid; | |
845 | ||
846 | memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid); | |
847 | ||
848 | /* Add in the P_Key */ | |
849 | mgid.raw[4] = (priv->pkey >> 8) & 0xff; | |
850 | mgid.raw[5] = priv->pkey & 0xff; | |
851 | ||
852 | mcast = __ipoib_mcast_find(dev, &mgid); | |
853 | if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
854 | struct ipoib_mcast *nmcast; | |
855 | ||
856 | /* Not found or send-only group, let's add a new entry */ | |
857 | ipoib_dbg_mcast(priv, "adding multicast entry for mgid " | |
858 | IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid)); | |
859 | ||
860 | nmcast = ipoib_mcast_alloc(dev, 0); | |
861 | if (!nmcast) { | |
862 | ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); | |
863 | continue; | |
864 | } | |
865 | ||
866 | set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); | |
867 | ||
868 | nmcast->mcmember.mgid = mgid; | |
869 | ||
870 | if (mcast) { | |
871 | /* Destroy the send only entry */ | |
872 | list_del(&mcast->list); | |
873 | list_add_tail(&mcast->list, &remove_list); | |
874 | ||
875 | rb_replace_node(&mcast->rb_node, | |
876 | &nmcast->rb_node, | |
877 | &priv->multicast_tree); | |
878 | } else | |
879 | __ipoib_mcast_add(dev, nmcast); | |
880 | ||
881 | list_add_tail(&nmcast->list, &priv->multicast_list); | |
882 | } | |
883 | ||
884 | if (mcast) | |
885 | set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
886 | } | |
887 | ||
888 | /* Remove all of the entries don't exist anymore */ | |
889 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { | |
890 | if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && | |
891 | !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
892 | ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n", | |
893 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
894 | ||
895 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
896 | ||
897 | /* Move to the remove list */ | |
898 | list_del(&mcast->list); | |
899 | list_add_tail(&mcast->list, &remove_list); | |
900 | } | |
901 | } | |
78bfe0b5 MT |
902 | |
903 | spin_unlock(&priv->lock); | |
904 | spin_unlock_irqrestore(&dev->xmit_lock, flags); | |
1da177e4 LT |
905 | |
906 | /* We have to cancel outside of the spinlock */ | |
907 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { | |
908 | ipoib_mcast_leave(mcast->dev, mcast); | |
909 | ipoib_mcast_free(mcast); | |
910 | } | |
911 | ||
912 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
913 | ipoib_mcast_start_thread(dev); | |
914 | } | |
915 | ||
8ae5a8a2 RD |
916 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
917 | ||
1da177e4 LT |
918 | struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev) |
919 | { | |
920 | struct ipoib_mcast_iter *iter; | |
921 | ||
922 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
923 | if (!iter) | |
924 | return NULL; | |
925 | ||
926 | iter->dev = dev; | |
1732b0ef | 927 | memset(iter->mgid.raw, 0, 16); |
1da177e4 LT |
928 | |
929 | if (ipoib_mcast_iter_next(iter)) { | |
1732b0ef | 930 | kfree(iter); |
1da177e4 LT |
931 | return NULL; |
932 | } | |
933 | ||
934 | return iter; | |
935 | } | |
936 | ||
1da177e4 LT |
937 | int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) |
938 | { | |
939 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
940 | struct rb_node *n; | |
941 | struct ipoib_mcast *mcast; | |
942 | int ret = 1; | |
943 | ||
944 | spin_lock_irq(&priv->lock); | |
945 | ||
946 | n = rb_first(&priv->multicast_tree); | |
947 | ||
948 | while (n) { | |
949 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
950 | ||
951 | if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, | |
952 | sizeof (union ib_gid)) < 0) { | |
953 | iter->mgid = mcast->mcmember.mgid; | |
954 | iter->created = mcast->created; | |
955 | iter->queuelen = skb_queue_len(&mcast->pkt_queue); | |
956 | iter->complete = !!mcast->ah; | |
957 | iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); | |
958 | ||
959 | ret = 0; | |
960 | ||
961 | break; | |
962 | } | |
963 | ||
964 | n = rb_next(n); | |
965 | } | |
966 | ||
967 | spin_unlock_irq(&priv->lock); | |
968 | ||
969 | return ret; | |
970 | } | |
971 | ||
972 | void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, | |
973 | union ib_gid *mgid, | |
974 | unsigned long *created, | |
975 | unsigned int *queuelen, | |
976 | unsigned int *complete, | |
977 | unsigned int *send_only) | |
978 | { | |
979 | *mgid = iter->mgid; | |
980 | *created = iter->created; | |
981 | *queuelen = iter->queuelen; | |
982 | *complete = iter->complete; | |
983 | *send_only = iter->send_only; | |
984 | } | |
8ae5a8a2 RD |
985 | |
986 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ |