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Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
[deliverable/linux.git] / drivers / infiniband / ulp / ipoib / ipoib_multicast.c
1 /*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
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
46 #include "ipoib.h"
47
48 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
49 static int mcast_debug_level;
50
51 module_param(mcast_debug_level, int, 0644);
52 MODULE_PARM_DESC(mcast_debug_level,
53 "Enable multicast debug tracing if > 0");
54 #endif
55
56 static DECLARE_MUTEX(mcast_mutex);
57
58 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
59 struct ipoib_mcast {
60 struct ib_sa_mcmember_rec mcmember;
61 struct ipoib_ah *ah;
62
63 struct rb_node rb_node;
64 struct list_head list;
65 struct completion done;
66
67 int query_id;
68 struct ib_sa_query *query;
69
70 unsigned long created;
71 unsigned long backoff;
72
73 unsigned long flags;
74 unsigned char logcount;
75
76 struct list_head neigh_list;
77
78 struct sk_buff_head pkt_queue;
79
80 struct net_device *dev;
81 };
82
83 struct ipoib_mcast_iter {
84 struct net_device *dev;
85 union ib_gid mgid;
86 unsigned long created;
87 unsigned int queuelen;
88 unsigned int complete;
89 unsigned int send_only;
90 };
91
92 static void ipoib_mcast_free(struct ipoib_mcast *mcast)
93 {
94 struct net_device *dev = mcast->dev;
95 struct ipoib_dev_priv *priv = netdev_priv(dev);
96 struct ipoib_neigh *neigh, *tmp;
97 unsigned long flags;
98 LIST_HEAD(ah_list);
99 struct ipoib_ah *ah, *tah;
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) {
108 if (neigh->ah)
109 list_add_tail(&neigh->ah->list, &ah_list);
110 *to_ipoib_neigh(neigh->neighbour) = NULL;
111 neigh->neighbour->ops->destructor = NULL;
112 kfree(neigh);
113 }
114
115 spin_unlock_irqrestore(&priv->lock, flags);
116
117 list_for_each_entry_safe(ah, tah, &ah_list, list)
118 ipoib_put_ah(ah);
119
120 if (mcast->ah)
121 ipoib_put_ah(mcast->ah);
122
123 while (!skb_queue_empty(&mcast->pkt_queue))
124 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
125
126 kfree(mcast);
127 }
128
129 static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
130 int can_sleep)
131 {
132 struct ipoib_mcast *mcast;
133
134 mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
135 if (!mcast)
136 return NULL;
137
138 mcast->dev = dev;
139 mcast->created = jiffies;
140 mcast->backoff = 1;
141
142 INIT_LIST_HEAD(&mcast->list);
143 INIT_LIST_HEAD(&mcast->neigh_list);
144 skb_queue_head_init(&mcast->pkt_queue);
145
146 return mcast;
147 }
148
149 static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_gid *mgid)
150 {
151 struct ipoib_dev_priv *priv = netdev_priv(dev);
152 struct rb_node *n = priv->multicast_tree.rb_node;
153
154 while (n) {
155 struct ipoib_mcast *mcast;
156 int ret;
157
158 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
159
160 ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw,
161 sizeof (union ib_gid));
162 if (ret < 0)
163 n = n->rb_left;
164 else if (ret > 0)
165 n = n->rb_right;
166 else
167 return mcast;
168 }
169
170 return NULL;
171 }
172
173 static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast)
174 {
175 struct ipoib_dev_priv *priv = netdev_priv(dev);
176 struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL;
177
178 while (*n) {
179 struct ipoib_mcast *tmcast;
180 int ret;
181
182 pn = *n;
183 tmcast = rb_entry(pn, struct ipoib_mcast, rb_node);
184
185 ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw,
186 sizeof (union ib_gid));
187 if (ret < 0)
188 n = &pn->rb_left;
189 else if (ret > 0)
190 n = &pn->rb_right;
191 else
192 return -EEXIST;
193 }
194
195 rb_link_node(&mcast->rb_node, pn, n);
196 rb_insert_color(&mcast->rb_node, &priv->multicast_tree);
197
198 return 0;
199 }
200
201 static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
202 struct ib_sa_mcmember_rec *mcmember)
203 {
204 struct net_device *dev = mcast->dev;
205 struct ipoib_dev_priv *priv = netdev_priv(dev);
206 int ret;
207
208 mcast->mcmember = *mcmember;
209
210 /* Set the cached Q_Key before we attach if it's the broadcast group */
211 if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
212 sizeof (union ib_gid))) {
213 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey);
214 priv->tx_wr.wr.ud.remote_qkey = priv->qkey;
215 }
216
217 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
218 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
219 ipoib_warn(priv, "multicast group " IPOIB_GID_FMT
220 " already attached\n",
221 IPOIB_GID_ARG(mcast->mcmember.mgid));
222
223 return 0;
224 }
225
226 ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid),
227 &mcast->mcmember.mgid);
228 if (ret < 0) {
229 ipoib_warn(priv, "couldn't attach QP to multicast group "
230 IPOIB_GID_FMT "\n",
231 IPOIB_GID_ARG(mcast->mcmember.mgid));
232
233 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags);
234 return ret;
235 }
236 }
237
238 {
239 struct ib_ah_attr av = {
240 .dlid = be16_to_cpu(mcast->mcmember.mlid),
241 .port_num = priv->port,
242 .sl = mcast->mcmember.sl,
243 .ah_flags = IB_AH_GRH,
244 .grh = {
245 .flow_label = be32_to_cpu(mcast->mcmember.flow_label),
246 .hop_limit = mcast->mcmember.hop_limit,
247 .sgid_index = 0,
248 .traffic_class = mcast->mcmember.traffic_class
249 }
250 };
251 int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate);
252
253 av.grh.dgid = mcast->mcmember.mgid;
254
255 if (path_rate > 0 && priv->local_rate > path_rate)
256 av.static_rate = (priv->local_rate - 1) / path_rate;
257
258 ipoib_dbg_mcast(priv, "static_rate %d for local port %dX, mcmember %dX\n",
259 av.static_rate, priv->local_rate,
260 ib_sa_rate_enum_to_int(mcast->mcmember.rate));
261
262 mcast->ah = ipoib_create_ah(dev, priv->pd, &av);
263 if (!mcast->ah) {
264 ipoib_warn(priv, "ib_address_create failed\n");
265 } else {
266 ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT
267 " AV %p, LID 0x%04x, SL %d\n",
268 IPOIB_GID_ARG(mcast->mcmember.mgid),
269 mcast->ah->ah,
270 be16_to_cpu(mcast->mcmember.mlid),
271 mcast->mcmember.sl);
272 }
273 }
274
275 /* actually send any queued packets */
276 while (!skb_queue_empty(&mcast->pkt_queue)) {
277 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
278
279 skb->dev = dev;
280
281 if (!skb->dst || !skb->dst->neighbour) {
282 /* put pseudoheader back on for next time */
283 skb_push(skb, sizeof (struct ipoib_pseudoheader));
284 }
285
286 if (dev_queue_xmit(skb))
287 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
288 }
289
290 return 0;
291 }
292
293 static void
294 ipoib_mcast_sendonly_join_complete(int status,
295 struct ib_sa_mcmember_rec *mcmember,
296 void *mcast_ptr)
297 {
298 struct ipoib_mcast *mcast = mcast_ptr;
299 struct net_device *dev = mcast->dev;
300
301 if (!status)
302 ipoib_mcast_join_finish(mcast, mcmember);
303 else {
304 if (mcast->logcount++ < 20)
305 ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for "
306 IPOIB_GID_FMT ", status %d\n",
307 IPOIB_GID_ARG(mcast->mcmember.mgid), status);
308
309 /* Flush out any queued packets */
310 while (!skb_queue_empty(&mcast->pkt_queue))
311 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
312
313 /* Clear the busy flag so we try again */
314 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
315 }
316
317 complete(&mcast->done);
318 }
319
320 static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
321 {
322 struct net_device *dev = mcast->dev;
323 struct ipoib_dev_priv *priv = netdev_priv(dev);
324 struct ib_sa_mcmember_rec rec = {
325 #if 0 /* Some SMs don't support send-only yet */
326 .join_state = 4
327 #else
328 .join_state = 1
329 #endif
330 };
331 int ret = 0;
332
333 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
334 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n");
335 return -ENODEV;
336 }
337
338 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
339 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
340 return -EBUSY;
341 }
342
343 rec.mgid = mcast->mcmember.mgid;
344 rec.port_gid = priv->local_gid;
345 rec.pkey = cpu_to_be16(priv->pkey);
346
347 init_completion(&mcast->done);
348
349 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec,
350 IB_SA_MCMEMBER_REC_MGID |
351 IB_SA_MCMEMBER_REC_PORT_GID |
352 IB_SA_MCMEMBER_REC_PKEY |
353 IB_SA_MCMEMBER_REC_JOIN_STATE,
354 1000, GFP_ATOMIC,
355 ipoib_mcast_sendonly_join_complete,
356 mcast, &mcast->query);
357 if (ret < 0) {
358 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n",
359 ret);
360 } else {
361 ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT
362 ", starting join\n",
363 IPOIB_GID_ARG(mcast->mcmember.mgid));
364
365 mcast->query_id = ret;
366 }
367
368 return ret;
369 }
370
371 static void ipoib_mcast_join_complete(int status,
372 struct ib_sa_mcmember_rec *mcmember,
373 void *mcast_ptr)
374 {
375 struct ipoib_mcast *mcast = mcast_ptr;
376 struct net_device *dev = mcast->dev;
377 struct ipoib_dev_priv *priv = netdev_priv(dev);
378
379 ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT
380 " (status %d)\n",
381 IPOIB_GID_ARG(mcast->mcmember.mgid), status);
382
383 if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) {
384 mcast->backoff = 1;
385 down(&mcast_mutex);
386 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
387 queue_work(ipoib_workqueue, &priv->mcast_task);
388 up(&mcast_mutex);
389 complete(&mcast->done);
390 return;
391 }
392
393 if (status == -EINTR) {
394 complete(&mcast->done);
395 return;
396 }
397
398 if (status && mcast->logcount++ < 20) {
399 if (status == -ETIMEDOUT || status == -EINTR) {
400 ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT
401 ", status %d\n",
402 IPOIB_GID_ARG(mcast->mcmember.mgid),
403 status);
404 } else {
405 ipoib_warn(priv, "multicast join failed for "
406 IPOIB_GID_FMT ", status %d\n",
407 IPOIB_GID_ARG(mcast->mcmember.mgid),
408 status);
409 }
410 }
411
412 mcast->backoff *= 2;
413 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
414 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
415
416 mcast->query = NULL;
417
418 down(&mcast_mutex);
419 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) {
420 if (status == -ETIMEDOUT)
421 queue_work(ipoib_workqueue, &priv->mcast_task);
422 else
423 queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
424 mcast->backoff * HZ);
425 } else
426 complete(&mcast->done);
427 up(&mcast_mutex);
428
429 return;
430 }
431
432 static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
433 int create)
434 {
435 struct ipoib_dev_priv *priv = netdev_priv(dev);
436 struct ib_sa_mcmember_rec rec = {
437 .join_state = 1
438 };
439 ib_sa_comp_mask comp_mask;
440 int ret = 0;
441
442 ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n",
443 IPOIB_GID_ARG(mcast->mcmember.mgid));
444
445 rec.mgid = mcast->mcmember.mgid;
446 rec.port_gid = priv->local_gid;
447 rec.pkey = cpu_to_be16(priv->pkey);
448
449 comp_mask =
450 IB_SA_MCMEMBER_REC_MGID |
451 IB_SA_MCMEMBER_REC_PORT_GID |
452 IB_SA_MCMEMBER_REC_PKEY |
453 IB_SA_MCMEMBER_REC_JOIN_STATE;
454
455 if (create) {
456 comp_mask |=
457 IB_SA_MCMEMBER_REC_QKEY |
458 IB_SA_MCMEMBER_REC_SL |
459 IB_SA_MCMEMBER_REC_FLOW_LABEL |
460 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
461
462 rec.qkey = priv->broadcast->mcmember.qkey;
463 rec.sl = priv->broadcast->mcmember.sl;
464 rec.flow_label = priv->broadcast->mcmember.flow_label;
465 rec.traffic_class = priv->broadcast->mcmember.traffic_class;
466 }
467
468 init_completion(&mcast->done);
469
470 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask,
471 mcast->backoff * 1000, GFP_ATOMIC,
472 ipoib_mcast_join_complete,
473 mcast, &mcast->query);
474
475 if (ret < 0) {
476 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", ret);
477
478 mcast->backoff *= 2;
479 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
480 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
481
482 down(&mcast_mutex);
483 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
484 queue_delayed_work(ipoib_workqueue,
485 &priv->mcast_task,
486 mcast->backoff * HZ);
487 up(&mcast_mutex);
488 } else
489 mcast->query_id = ret;
490 }
491
492 void ipoib_mcast_join_task(void *dev_ptr)
493 {
494 struct net_device *dev = dev_ptr;
495 struct ipoib_dev_priv *priv = netdev_priv(dev);
496
497 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
498 return;
499
500 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid))
501 ipoib_warn(priv, "ib_gid_entry_get() failed\n");
502 else
503 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
504
505 {
506 struct ib_port_attr attr;
507
508 if (!ib_query_port(priv->ca, priv->port, &attr)) {
509 priv->local_lid = attr.lid;
510 priv->local_rate = attr.active_speed *
511 ib_width_enum_to_int(attr.active_width);
512 } else
513 ipoib_warn(priv, "ib_query_port failed\n");
514 }
515
516 if (!priv->broadcast) {
517 priv->broadcast = ipoib_mcast_alloc(dev, 1);
518 if (!priv->broadcast) {
519 ipoib_warn(priv, "failed to allocate broadcast group\n");
520 down(&mcast_mutex);
521 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
522 queue_delayed_work(ipoib_workqueue,
523 &priv->mcast_task, HZ);
524 up(&mcast_mutex);
525 return;
526 }
527
528 memcpy(priv->broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
529 sizeof (union ib_gid));
530
531 spin_lock_irq(&priv->lock);
532 __ipoib_mcast_add(dev, priv->broadcast);
533 spin_unlock_irq(&priv->lock);
534 }
535
536 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
537 ipoib_mcast_join(dev, priv->broadcast, 0);
538 return;
539 }
540
541 while (1) {
542 struct ipoib_mcast *mcast = NULL;
543
544 spin_lock_irq(&priv->lock);
545 list_for_each_entry(mcast, &priv->multicast_list, list) {
546 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)
547 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)
548 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
549 /* Found the next unjoined group */
550 break;
551 }
552 }
553 spin_unlock_irq(&priv->lock);
554
555 if (&mcast->list == &priv->multicast_list) {
556 /* All done */
557 break;
558 }
559
560 ipoib_mcast_join(dev, mcast, 1);
561 return;
562 }
563
564 priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) -
565 IPOIB_ENCAP_LEN;
566 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
567
568 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");
569
570 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
571 netif_carrier_on(dev);
572 }
573
574 int ipoib_mcast_start_thread(struct net_device *dev)
575 {
576 struct ipoib_dev_priv *priv = netdev_priv(dev);
577
578 ipoib_dbg_mcast(priv, "starting multicast thread\n");
579
580 down(&mcast_mutex);
581 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
582 queue_work(ipoib_workqueue, &priv->mcast_task);
583 up(&mcast_mutex);
584
585 return 0;
586 }
587
588 int ipoib_mcast_stop_thread(struct net_device *dev, int flush)
589 {
590 struct ipoib_dev_priv *priv = netdev_priv(dev);
591 struct ipoib_mcast *mcast;
592
593 ipoib_dbg_mcast(priv, "stopping multicast thread\n");
594
595 down(&mcast_mutex);
596 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
597 cancel_delayed_work(&priv->mcast_task);
598 up(&mcast_mutex);
599
600 if (flush)
601 flush_workqueue(ipoib_workqueue);
602
603 if (priv->broadcast && priv->broadcast->query) {
604 ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query);
605 priv->broadcast->query = NULL;
606 ipoib_dbg_mcast(priv, "waiting for bcast\n");
607 wait_for_completion(&priv->broadcast->done);
608 }
609
610 list_for_each_entry(mcast, &priv->multicast_list, list) {
611 if (mcast->query) {
612 ib_sa_cancel_query(mcast->query_id, mcast->query);
613 mcast->query = NULL;
614 ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n",
615 IPOIB_GID_ARG(mcast->mcmember.mgid));
616 wait_for_completion(&mcast->done);
617 }
618 }
619
620 return 0;
621 }
622
623 static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
624 {
625 struct ipoib_dev_priv *priv = netdev_priv(dev);
626 struct ib_sa_mcmember_rec rec = {
627 .join_state = 1
628 };
629 int ret = 0;
630
631 if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags))
632 return 0;
633
634 ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n",
635 IPOIB_GID_ARG(mcast->mcmember.mgid));
636
637 rec.mgid = mcast->mcmember.mgid;
638 rec.port_gid = priv->local_gid;
639 rec.pkey = cpu_to_be16(priv->pkey);
640
641 /* Remove ourselves from the multicast group */
642 ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid),
643 &mcast->mcmember.mgid);
644 if (ret)
645 ipoib_warn(priv, "ipoib_mcast_detach failed (result = %d)\n", ret);
646
647 /*
648 * Just make one shot at leaving and don't wait for a reply;
649 * if we fail, too bad.
650 */
651 ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec,
652 IB_SA_MCMEMBER_REC_MGID |
653 IB_SA_MCMEMBER_REC_PORT_GID |
654 IB_SA_MCMEMBER_REC_PKEY |
655 IB_SA_MCMEMBER_REC_JOIN_STATE,
656 0, GFP_ATOMIC, NULL,
657 mcast, &mcast->query);
658 if (ret < 0)
659 ipoib_warn(priv, "ib_sa_mcmember_rec_delete failed "
660 "for leave (result = %d)\n", ret);
661
662 return 0;
663 }
664
665 void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid,
666 struct sk_buff *skb)
667 {
668 struct ipoib_dev_priv *priv = netdev_priv(dev);
669 struct ipoib_mcast *mcast;
670
671 /*
672 * We can only be called from ipoib_start_xmit, so we're
673 * inside tx_lock -- no need to save/restore flags.
674 */
675 spin_lock(&priv->lock);
676
677 mcast = __ipoib_mcast_find(dev, mgid);
678 if (!mcast) {
679 /* Let's create a new send only group now */
680 ipoib_dbg_mcast(priv, "setting up send only multicast group for "
681 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid));
682
683 mcast = ipoib_mcast_alloc(dev, 0);
684 if (!mcast) {
685 ipoib_warn(priv, "unable to allocate memory for "
686 "multicast structure\n");
687 dev_kfree_skb_any(skb);
688 goto out;
689 }
690
691 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
692 mcast->mcmember.mgid = *mgid;
693 __ipoib_mcast_add(dev, mcast);
694 list_add_tail(&mcast->list, &priv->multicast_list);
695 }
696
697 if (!mcast->ah) {
698 if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
699 skb_queue_tail(&mcast->pkt_queue, skb);
700 else
701 dev_kfree_skb_any(skb);
702
703 if (mcast->query)
704 ipoib_dbg_mcast(priv, "no address vector, "
705 "but multicast join already started\n");
706 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
707 ipoib_mcast_sendonly_join(mcast);
708
709 /*
710 * If lookup completes between here and out:, don't
711 * want to send packet twice.
712 */
713 mcast = NULL;
714 }
715
716 out:
717 if (mcast && mcast->ah) {
718 if (skb->dst &&
719 skb->dst->neighbour &&
720 !*to_ipoib_neigh(skb->dst->neighbour)) {
721 struct ipoib_neigh *neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
722
723 if (neigh) {
724 kref_get(&mcast->ah->ref);
725 neigh->ah = mcast->ah;
726 neigh->neighbour = skb->dst->neighbour;
727 *to_ipoib_neigh(skb->dst->neighbour) = neigh;
728 list_add_tail(&neigh->list, &mcast->neigh_list);
729 }
730 }
731
732 ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
733 }
734
735 spin_unlock(&priv->lock);
736 }
737
738 void ipoib_mcast_dev_flush(struct net_device *dev)
739 {
740 struct ipoib_dev_priv *priv = netdev_priv(dev);
741 LIST_HEAD(remove_list);
742 struct ipoib_mcast *mcast, *tmcast, *nmcast;
743 unsigned long flags;
744
745 ipoib_dbg_mcast(priv, "flushing multicast list\n");
746
747 spin_lock_irqsave(&priv->lock, flags);
748 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
749 nmcast = ipoib_mcast_alloc(dev, 0);
750 if (nmcast) {
751 nmcast->flags =
752 mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY);
753
754 nmcast->mcmember.mgid = mcast->mcmember.mgid;
755
756 /* Add the new group in before the to-be-destroyed group */
757 list_add_tail(&nmcast->list, &mcast->list);
758 list_del_init(&mcast->list);
759
760 rb_replace_node(&mcast->rb_node, &nmcast->rb_node,
761 &priv->multicast_tree);
762
763 list_add_tail(&mcast->list, &remove_list);
764 } else {
765 ipoib_warn(priv, "could not reallocate multicast group "
766 IPOIB_GID_FMT "\n",
767 IPOIB_GID_ARG(mcast->mcmember.mgid));
768 }
769 }
770
771 if (priv->broadcast) {
772 nmcast = ipoib_mcast_alloc(dev, 0);
773 if (nmcast) {
774 nmcast->mcmember.mgid = priv->broadcast->mcmember.mgid;
775
776 rb_replace_node(&priv->broadcast->rb_node,
777 &nmcast->rb_node,
778 &priv->multicast_tree);
779
780 list_add_tail(&priv->broadcast->list, &remove_list);
781 }
782
783 priv->broadcast = nmcast;
784 }
785
786 spin_unlock_irqrestore(&priv->lock, flags);
787
788 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
789 ipoib_mcast_leave(dev, mcast);
790 ipoib_mcast_free(mcast);
791 }
792 }
793
794 void ipoib_mcast_dev_down(struct net_device *dev)
795 {
796 struct ipoib_dev_priv *priv = netdev_priv(dev);
797 unsigned long flags;
798
799 /* Delete broadcast since it will be recreated */
800 if (priv->broadcast) {
801 ipoib_dbg_mcast(priv, "deleting broadcast group\n");
802
803 spin_lock_irqsave(&priv->lock, flags);
804 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
805 spin_unlock_irqrestore(&priv->lock, flags);
806 ipoib_mcast_leave(dev, priv->broadcast);
807 ipoib_mcast_free(priv->broadcast);
808 priv->broadcast = NULL;
809 }
810 }
811
812 void ipoib_mcast_restart_task(void *dev_ptr)
813 {
814 struct net_device *dev = dev_ptr;
815 struct ipoib_dev_priv *priv = netdev_priv(dev);
816 struct dev_mc_list *mclist;
817 struct ipoib_mcast *mcast, *tmcast;
818 LIST_HEAD(remove_list);
819 unsigned long flags;
820
821 ipoib_dbg_mcast(priv, "restarting multicast task\n");
822
823 ipoib_mcast_stop_thread(dev, 0);
824
825 spin_lock_irqsave(&priv->lock, flags);
826
827 /*
828 * Unfortunately, the networking core only gives us a list of all of
829 * the multicast hardware addresses. We need to figure out which ones
830 * are new and which ones have been removed
831 */
832
833 /* Clear out the found flag */
834 list_for_each_entry(mcast, &priv->multicast_list, list)
835 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
836
837 /* Mark all of the entries that are found or don't exist */
838 for (mclist = dev->mc_list; mclist; mclist = mclist->next) {
839 union ib_gid mgid;
840
841 memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid);
842
843 /* Add in the P_Key */
844 mgid.raw[4] = (priv->pkey >> 8) & 0xff;
845 mgid.raw[5] = priv->pkey & 0xff;
846
847 mcast = __ipoib_mcast_find(dev, &mgid);
848 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
849 struct ipoib_mcast *nmcast;
850
851 /* Not found or send-only group, let's add a new entry */
852 ipoib_dbg_mcast(priv, "adding multicast entry for mgid "
853 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid));
854
855 nmcast = ipoib_mcast_alloc(dev, 0);
856 if (!nmcast) {
857 ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
858 continue;
859 }
860
861 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags);
862
863 nmcast->mcmember.mgid = mgid;
864
865 if (mcast) {
866 /* Destroy the send only entry */
867 list_del(&mcast->list);
868 list_add_tail(&mcast->list, &remove_list);
869
870 rb_replace_node(&mcast->rb_node,
871 &nmcast->rb_node,
872 &priv->multicast_tree);
873 } else
874 __ipoib_mcast_add(dev, nmcast);
875
876 list_add_tail(&nmcast->list, &priv->multicast_list);
877 }
878
879 if (mcast)
880 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
881 }
882
883 /* Remove all of the entries don't exist anymore */
884 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
885 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) &&
886 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
887 ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n",
888 IPOIB_GID_ARG(mcast->mcmember.mgid));
889
890 rb_erase(&mcast->rb_node, &priv->multicast_tree);
891
892 /* Move to the remove list */
893 list_del(&mcast->list);
894 list_add_tail(&mcast->list, &remove_list);
895 }
896 }
897 spin_unlock_irqrestore(&priv->lock, flags);
898
899 /* We have to cancel outside of the spinlock */
900 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
901 ipoib_mcast_leave(mcast->dev, mcast);
902 ipoib_mcast_free(mcast);
903 }
904
905 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
906 ipoib_mcast_start_thread(dev);
907 }
908
909 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
910
911 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
912 {
913 struct ipoib_mcast_iter *iter;
914
915 iter = kmalloc(sizeof *iter, GFP_KERNEL);
916 if (!iter)
917 return NULL;
918
919 iter->dev = dev;
920 memset(iter->mgid.raw, 0, 16);
921
922 if (ipoib_mcast_iter_next(iter)) {
923 kfree(iter);
924 return NULL;
925 }
926
927 return iter;
928 }
929
930 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
931 {
932 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
933 struct rb_node *n;
934 struct ipoib_mcast *mcast;
935 int ret = 1;
936
937 spin_lock_irq(&priv->lock);
938
939 n = rb_first(&priv->multicast_tree);
940
941 while (n) {
942 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
943
944 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw,
945 sizeof (union ib_gid)) < 0) {
946 iter->mgid = mcast->mcmember.mgid;
947 iter->created = mcast->created;
948 iter->queuelen = skb_queue_len(&mcast->pkt_queue);
949 iter->complete = !!mcast->ah;
950 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY));
951
952 ret = 0;
953
954 break;
955 }
956
957 n = rb_next(n);
958 }
959
960 spin_unlock_irq(&priv->lock);
961
962 return ret;
963 }
964
965 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
966 union ib_gid *mgid,
967 unsigned long *created,
968 unsigned int *queuelen,
969 unsigned int *complete,
970 unsigned int *send_only)
971 {
972 *mgid = iter->mgid;
973 *created = iter->created;
974 *queuelen = iter->queuelen;
975 *complete = iter->complete;
976 *send_only = iter->send_only;
977 }
978
979 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
Linux kernel - Deliverables
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