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[IPoIB] add path record information in debugfs
[GitHub/mt8127/android_kernel_alcatel_ttab.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 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
125
126 skb->dev = dev;
127 dev_kfree_skb_any(skb);
128 }
129
130 kfree(mcast);
131 }
132
133 static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
134 int can_sleep)
135 {
136 struct ipoib_mcast *mcast;
137
138 mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
139 if (!mcast)
140 return NULL;
141
142 init_completion(&mcast->done);
143
144 mcast->dev = dev;
145 mcast->created = jiffies;
146 mcast->backoff = 1;
147 mcast->logcount = 0;
148
149 INIT_LIST_HEAD(&mcast->list);
150 INIT_LIST_HEAD(&mcast->neigh_list);
151 skb_queue_head_init(&mcast->pkt_queue);
152
153 mcast->ah = NULL;
154 mcast->query = NULL;
155
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);
216 int ret;
217
218 mcast->mcmember = *mcmember;
219
220 /* Set the cached Q_Key before we attach if it's the broadcast group */
221 if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
222 sizeof (union ib_gid))) {
223 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey);
224 priv->tx_wr.wr.ud.remote_qkey = priv->qkey;
225 }
226
227 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
228 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
229 ipoib_warn(priv, "multicast group " IPOIB_GID_FMT
230 " already attached\n",
231 IPOIB_GID_ARG(mcast->mcmember.mgid));
232
233 return 0;
234 }
235
236 ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid),
237 &mcast->mcmember.mgid);
238 if (ret < 0) {
239 ipoib_warn(priv, "couldn't attach QP to multicast group "
240 IPOIB_GID_FMT "\n",
241 IPOIB_GID_ARG(mcast->mcmember.mgid));
242
243 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags);
244 return ret;
245 }
246 }
247
248 {
249 struct ib_ah_attr av = {
250 .dlid = be16_to_cpu(mcast->mcmember.mlid),
251 .port_num = priv->port,
252 .sl = mcast->mcmember.sl,
253 .ah_flags = IB_AH_GRH,
254 .grh = {
255 .flow_label = be32_to_cpu(mcast->mcmember.flow_label),
256 .hop_limit = mcast->mcmember.hop_limit,
257 .sgid_index = 0,
258 .traffic_class = mcast->mcmember.traffic_class
259 }
260 };
261 int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate);
262
263 av.grh.dgid = mcast->mcmember.mgid;
264
265 if (path_rate > 0 && priv->local_rate > path_rate)
266 av.static_rate = (priv->local_rate - 1) / path_rate;
267
268 ipoib_dbg_mcast(priv, "static_rate %d for local port %dX, mcmember %dX\n",
269 av.static_rate, priv->local_rate,
270 ib_sa_rate_enum_to_int(mcast->mcmember.rate));
271
272 mcast->ah = ipoib_create_ah(dev, priv->pd, &av);
273 if (!mcast->ah) {
274 ipoib_warn(priv, "ib_address_create failed\n");
275 } else {
276 ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT
277 " AV %p, LID 0x%04x, SL %d\n",
278 IPOIB_GID_ARG(mcast->mcmember.mgid),
279 mcast->ah->ah,
280 be16_to_cpu(mcast->mcmember.mlid),
281 mcast->mcmember.sl);
282 }
283 }
284
285 /* actually send any queued packets */
286 while (!skb_queue_empty(&mcast->pkt_queue)) {
287 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
288
289 skb->dev = dev;
290
291 if (!skb->dst || !skb->dst->neighbour) {
292 /* put pseudoheader back on for next time */
293 skb_push(skb, sizeof (struct ipoib_pseudoheader));
294 }
295
296 if (dev_queue_xmit(skb))
297 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
298 }
299
300 return 0;
301 }
302
303 static void
304 ipoib_mcast_sendonly_join_complete(int status,
305 struct ib_sa_mcmember_rec *mcmember,
306 void *mcast_ptr)
307 {
308 struct ipoib_mcast *mcast = mcast_ptr;
309 struct net_device *dev = mcast->dev;
310
311 if (!status)
312 ipoib_mcast_join_finish(mcast, mcmember);
313 else {
314 if (mcast->logcount++ < 20)
315 ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for "
316 IPOIB_GID_FMT ", status %d\n",
317 IPOIB_GID_ARG(mcast->mcmember.mgid), status);
318
319 /* Flush out any queued packets */
320 while (!skb_queue_empty(&mcast->pkt_queue)) {
321 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
322
323 skb->dev = dev;
324
325 dev_kfree_skb_any(skb);
326 }
327
328 /* Clear the busy flag so we try again */
329 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
330 }
331
332 complete(&mcast->done);
333 }
334
335 static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
336 {
337 struct net_device *dev = mcast->dev;
338 struct ipoib_dev_priv *priv = netdev_priv(dev);
339 struct ib_sa_mcmember_rec rec = {
340 #if 0 /* Some SMs don't support send-only yet */
341 .join_state = 4
342 #else
343 .join_state = 1
344 #endif
345 };
346 int ret = 0;
347
348 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
349 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n");
350 return -ENODEV;
351 }
352
353 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
354 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
355 return -EBUSY;
356 }
357
358 rec.mgid = mcast->mcmember.mgid;
359 rec.port_gid = priv->local_gid;
360 rec.pkey = cpu_to_be16(priv->pkey);
361
362 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec,
363 IB_SA_MCMEMBER_REC_MGID |
364 IB_SA_MCMEMBER_REC_PORT_GID |
365 IB_SA_MCMEMBER_REC_PKEY |
366 IB_SA_MCMEMBER_REC_JOIN_STATE,
367 1000, GFP_ATOMIC,
368 ipoib_mcast_sendonly_join_complete,
369 mcast, &mcast->query);
370 if (ret < 0) {
371 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n",
372 ret);
373 } else {
374 ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT
375 ", starting join\n",
376 IPOIB_GID_ARG(mcast->mcmember.mgid));
377
378 mcast->query_id = ret;
379 }
380
381 return ret;
382 }
383
384 static void ipoib_mcast_join_complete(int status,
385 struct ib_sa_mcmember_rec *mcmember,
386 void *mcast_ptr)
387 {
388 struct ipoib_mcast *mcast = mcast_ptr;
389 struct net_device *dev = mcast->dev;
390 struct ipoib_dev_priv *priv = netdev_priv(dev);
391
392 ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT
393 " (status %d)\n",
394 IPOIB_GID_ARG(mcast->mcmember.mgid), status);
395
396 if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) {
397 mcast->backoff = 1;
398 down(&mcast_mutex);
399 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
400 queue_work(ipoib_workqueue, &priv->mcast_task);
401 up(&mcast_mutex);
402 complete(&mcast->done);
403 return;
404 }
405
406 if (status == -EINTR) {
407 complete(&mcast->done);
408 return;
409 }
410
411 if (status && mcast->logcount++ < 20) {
412 if (status == -ETIMEDOUT || status == -EINTR) {
413 ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT
414 ", status %d\n",
415 IPOIB_GID_ARG(mcast->mcmember.mgid),
416 status);
417 } else {
418 ipoib_warn(priv, "multicast join failed for "
419 IPOIB_GID_FMT ", status %d\n",
420 IPOIB_GID_ARG(mcast->mcmember.mgid),
421 status);
422 }
423 }
424
425 mcast->backoff *= 2;
426 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
427 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
428
429 mcast->query = NULL;
430
431 down(&mcast_mutex);
432 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) {
433 if (status == -ETIMEDOUT)
434 queue_work(ipoib_workqueue, &priv->mcast_task);
435 else
436 queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
437 mcast->backoff * HZ);
438 } else
439 complete(&mcast->done);
440 up(&mcast_mutex);
441
442 return;
443 }
444
445 static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
446 int create)
447 {
448 struct ipoib_dev_priv *priv = netdev_priv(dev);
449 struct ib_sa_mcmember_rec rec = {
450 .join_state = 1
451 };
452 ib_sa_comp_mask comp_mask;
453 int ret = 0;
454
455 ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n",
456 IPOIB_GID_ARG(mcast->mcmember.mgid));
457
458 rec.mgid = mcast->mcmember.mgid;
459 rec.port_gid = priv->local_gid;
460 rec.pkey = cpu_to_be16(priv->pkey);
461
462 comp_mask =
463 IB_SA_MCMEMBER_REC_MGID |
464 IB_SA_MCMEMBER_REC_PORT_GID |
465 IB_SA_MCMEMBER_REC_PKEY |
466 IB_SA_MCMEMBER_REC_JOIN_STATE;
467
468 if (create) {
469 comp_mask |=
470 IB_SA_MCMEMBER_REC_QKEY |
471 IB_SA_MCMEMBER_REC_SL |
472 IB_SA_MCMEMBER_REC_FLOW_LABEL |
473 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
474
475 rec.qkey = priv->broadcast->mcmember.qkey;
476 rec.sl = priv->broadcast->mcmember.sl;
477 rec.flow_label = priv->broadcast->mcmember.flow_label;
478 rec.traffic_class = priv->broadcast->mcmember.traffic_class;
479 }
480
481 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask,
482 mcast->backoff * 1000, GFP_ATOMIC,
483 ipoib_mcast_join_complete,
484 mcast, &mcast->query);
485
486 if (ret < 0) {
487 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", ret);
488
489 mcast->backoff *= 2;
490 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
491 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
492
493 down(&mcast_mutex);
494 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
495 queue_delayed_work(ipoib_workqueue,
496 &priv->mcast_task,
497 mcast->backoff * HZ);
498 up(&mcast_mutex);
499 } else
500 mcast->query_id = ret;
501 }
502
503 void ipoib_mcast_join_task(void *dev_ptr)
504 {
505 struct net_device *dev = dev_ptr;
506 struct ipoib_dev_priv *priv = netdev_priv(dev);
507
508 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
509 return;
510
511 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid))
512 ipoib_warn(priv, "ib_gid_entry_get() failed\n");
513 else
514 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
515
516 {
517 struct ib_port_attr attr;
518
519 if (!ib_query_port(priv->ca, priv->port, &attr)) {
520 priv->local_lid = attr.lid;
521 priv->local_rate = attr.active_speed *
522 ib_width_enum_to_int(attr.active_width);
523 } else
524 ipoib_warn(priv, "ib_query_port failed\n");
525 }
526
527 if (!priv->broadcast) {
528 priv->broadcast = ipoib_mcast_alloc(dev, 1);
529 if (!priv->broadcast) {
530 ipoib_warn(priv, "failed to allocate broadcast group\n");
531 down(&mcast_mutex);
532 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
533 queue_delayed_work(ipoib_workqueue,
534 &priv->mcast_task, HZ);
535 up(&mcast_mutex);
536 return;
537 }
538
539 memcpy(priv->broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
540 sizeof (union ib_gid));
541
542 spin_lock_irq(&priv->lock);
543 __ipoib_mcast_add(dev, priv->broadcast);
544 spin_unlock_irq(&priv->lock);
545 }
546
547 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
548 ipoib_mcast_join(dev, priv->broadcast, 0);
549 return;
550 }
551
552 while (1) {
553 struct ipoib_mcast *mcast = NULL;
554
555 spin_lock_irq(&priv->lock);
556 list_for_each_entry(mcast, &priv->multicast_list, list) {
557 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)
558 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)
559 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
560 /* Found the next unjoined group */
561 break;
562 }
563 }
564 spin_unlock_irq(&priv->lock);
565
566 if (&mcast->list == &priv->multicast_list) {
567 /* All done */
568 break;
569 }
570
571 ipoib_mcast_join(dev, mcast, 1);
572 return;
573 }
574
575 priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) -
576 IPOIB_ENCAP_LEN;
577 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
578
579 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");
580
581 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
582 netif_carrier_on(dev);
583 }
584
585 int ipoib_mcast_start_thread(struct net_device *dev)
586 {
587 struct ipoib_dev_priv *priv = netdev_priv(dev);
588
589 ipoib_dbg_mcast(priv, "starting multicast thread\n");
590
591 down(&mcast_mutex);
592 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
593 queue_work(ipoib_workqueue, &priv->mcast_task);
594 up(&mcast_mutex);
595
596 return 0;
597 }
598
599 int ipoib_mcast_stop_thread(struct net_device *dev, int flush)
600 {
601 struct ipoib_dev_priv *priv = netdev_priv(dev);
602 struct ipoib_mcast *mcast;
603
604 ipoib_dbg_mcast(priv, "stopping multicast thread\n");
605
606 down(&mcast_mutex);
607 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
608 cancel_delayed_work(&priv->mcast_task);
609 up(&mcast_mutex);
610
611 if (flush)
612 flush_workqueue(ipoib_workqueue);
613
614 if (priv->broadcast && priv->broadcast->query) {
615 ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query);
616 priv->broadcast->query = NULL;
617 ipoib_dbg_mcast(priv, "waiting for bcast\n");
618 wait_for_completion(&priv->broadcast->done);
619 }
620
621 list_for_each_entry(mcast, &priv->multicast_list, list) {
622 if (mcast->query) {
623 ib_sa_cancel_query(mcast->query_id, mcast->query);
624 mcast->query = NULL;
625 ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n",
626 IPOIB_GID_ARG(mcast->mcmember.mgid));
627 wait_for_completion(&mcast->done);
628 }
629 }
630
631 return 0;
632 }
633
634 static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
635 {
636 struct ipoib_dev_priv *priv = netdev_priv(dev);
637 struct ib_sa_mcmember_rec rec = {
638 .join_state = 1
639 };
640 int ret = 0;
641
642 if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags))
643 return 0;
644
645 ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n",
646 IPOIB_GID_ARG(mcast->mcmember.mgid));
647
648 rec.mgid = mcast->mcmember.mgid;
649 rec.port_gid = priv->local_gid;
650 rec.pkey = cpu_to_be16(priv->pkey);
651
652 /* Remove ourselves from the multicast group */
653 ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid),
654 &mcast->mcmember.mgid);
655 if (ret)
656 ipoib_warn(priv, "ipoib_mcast_detach failed (result = %d)\n", ret);
657
658 /*
659 * Just make one shot at leaving and don't wait for a reply;
660 * if we fail, too bad.
661 */
662 ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec,
663 IB_SA_MCMEMBER_REC_MGID |
664 IB_SA_MCMEMBER_REC_PORT_GID |
665 IB_SA_MCMEMBER_REC_PKEY |
666 IB_SA_MCMEMBER_REC_JOIN_STATE,
667 0, GFP_ATOMIC, NULL,
668 mcast, &mcast->query);
669 if (ret < 0)
670 ipoib_warn(priv, "ib_sa_mcmember_rec_delete failed "
671 "for leave (result = %d)\n", ret);
672
673 return 0;
674 }
675
676 void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid,
677 struct sk_buff *skb)
678 {
679 struct ipoib_dev_priv *priv = netdev_priv(dev);
680 struct ipoib_mcast *mcast;
681
682 /*
683 * We can only be called from ipoib_start_xmit, so we're
684 * inside tx_lock -- no need to save/restore flags.
685 */
686 spin_lock(&priv->lock);
687
688 mcast = __ipoib_mcast_find(dev, mgid);
689 if (!mcast) {
690 /* Let's create a new send only group now */
691 ipoib_dbg_mcast(priv, "setting up send only multicast group for "
692 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid));
693
694 mcast = ipoib_mcast_alloc(dev, 0);
695 if (!mcast) {
696 ipoib_warn(priv, "unable to allocate memory for "
697 "multicast structure\n");
698 dev_kfree_skb_any(skb);
699 goto out;
700 }
701
702 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
703 mcast->mcmember.mgid = *mgid;
704 __ipoib_mcast_add(dev, mcast);
705 list_add_tail(&mcast->list, &priv->multicast_list);
706 }
707
708 if (!mcast->ah) {
709 if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
710 skb_queue_tail(&mcast->pkt_queue, skb);
711 else
712 dev_kfree_skb_any(skb);
713
714 if (mcast->query)
715 ipoib_dbg_mcast(priv, "no address vector, "
716 "but multicast join already started\n");
717 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
718 ipoib_mcast_sendonly_join(mcast);
719
720 /*
721 * If lookup completes between here and out:, don't
722 * want to send packet twice.
723 */
724 mcast = NULL;
725 }
726
727 out:
728 if (mcast && mcast->ah) {
729 if (skb->dst &&
730 skb->dst->neighbour &&
731 !*to_ipoib_neigh(skb->dst->neighbour)) {
732 struct ipoib_neigh *neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
733
734 if (neigh) {
735 kref_get(&mcast->ah->ref);
736 neigh->ah = mcast->ah;
737 neigh->neighbour = skb->dst->neighbour;
738 *to_ipoib_neigh(skb->dst->neighbour) = neigh;
739 list_add_tail(&neigh->list, &mcast->neigh_list);
740 }
741 }
742
743 ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
744 }
745
746 spin_unlock(&priv->lock);
747 }
748
749 void ipoib_mcast_dev_flush(struct net_device *dev)
750 {
751 struct ipoib_dev_priv *priv = netdev_priv(dev);
752 LIST_HEAD(remove_list);
753 struct ipoib_mcast *mcast, *tmcast, *nmcast;
754 unsigned long flags;
755
756 ipoib_dbg_mcast(priv, "flushing multicast list\n");
757
758 spin_lock_irqsave(&priv->lock, flags);
759 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
760 nmcast = ipoib_mcast_alloc(dev, 0);
761 if (nmcast) {
762 nmcast->flags =
763 mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY);
764
765 nmcast->mcmember.mgid = mcast->mcmember.mgid;
766
767 /* Add the new group in before the to-be-destroyed group */
768 list_add_tail(&nmcast->list, &mcast->list);
769 list_del_init(&mcast->list);
770
771 rb_replace_node(&mcast->rb_node, &nmcast->rb_node,
772 &priv->multicast_tree);
773
774 list_add_tail(&mcast->list, &remove_list);
775 } else {
776 ipoib_warn(priv, "could not reallocate multicast group "
777 IPOIB_GID_FMT "\n",
778 IPOIB_GID_ARG(mcast->mcmember.mgid));
779 }
780 }
781
782 if (priv->broadcast) {
783 nmcast = ipoib_mcast_alloc(dev, 0);
784 if (nmcast) {
785 nmcast->mcmember.mgid = priv->broadcast->mcmember.mgid;
786
787 rb_replace_node(&priv->broadcast->rb_node,
788 &nmcast->rb_node,
789 &priv->multicast_tree);
790
791 list_add_tail(&priv->broadcast->list, &remove_list);
792 }
793
794 priv->broadcast = nmcast;
795 }
796
797 spin_unlock_irqrestore(&priv->lock, flags);
798
799 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
800 ipoib_mcast_leave(dev, mcast);
801 ipoib_mcast_free(mcast);
802 }
803 }
804
805 void ipoib_mcast_dev_down(struct net_device *dev)
806 {
807 struct ipoib_dev_priv *priv = netdev_priv(dev);
808 unsigned long flags;
809
810 /* Delete broadcast since it will be recreated */
811 if (priv->broadcast) {
812 ipoib_dbg_mcast(priv, "deleting broadcast group\n");
813
814 spin_lock_irqsave(&priv->lock, flags);
815 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
816 spin_unlock_irqrestore(&priv->lock, flags);
817 ipoib_mcast_leave(dev, priv->broadcast);
818 ipoib_mcast_free(priv->broadcast);
819 priv->broadcast = NULL;
820 }
821 }
822
823 void ipoib_mcast_restart_task(void *dev_ptr)
824 {
825 struct net_device *dev = dev_ptr;
826 struct ipoib_dev_priv *priv = netdev_priv(dev);
827 struct dev_mc_list *mclist;
828 struct ipoib_mcast *mcast, *tmcast;
829 LIST_HEAD(remove_list);
830 unsigned long flags;
831
832 ipoib_dbg_mcast(priv, "restarting multicast task\n");
833
834 ipoib_mcast_stop_thread(dev, 0);
835
836 spin_lock_irqsave(&priv->lock, flags);
837
838 /*
839 * Unfortunately, the networking core only gives us a list of all of
840 * the multicast hardware addresses. We need to figure out which ones
841 * are new and which ones have been removed
842 */
843
844 /* Clear out the found flag */
845 list_for_each_entry(mcast, &priv->multicast_list, list)
846 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
847
848 /* Mark all of the entries that are found or don't exist */
849 for (mclist = dev->mc_list; mclist; mclist = mclist->next) {
850 union ib_gid mgid;
851
852 memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid);
853
854 /* Add in the P_Key */
855 mgid.raw[4] = (priv->pkey >> 8) & 0xff;
856 mgid.raw[5] = priv->pkey & 0xff;
857
858 mcast = __ipoib_mcast_find(dev, &mgid);
859 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
860 struct ipoib_mcast *nmcast;
861
862 /* Not found or send-only group, let's add a new entry */
863 ipoib_dbg_mcast(priv, "adding multicast entry for mgid "
864 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid));
865
866 nmcast = ipoib_mcast_alloc(dev, 0);
867 if (!nmcast) {
868 ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
869 continue;
870 }
871
872 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags);
873
874 nmcast->mcmember.mgid = mgid;
875
876 if (mcast) {
877 /* Destroy the send only entry */
878 list_del(&mcast->list);
879 list_add_tail(&mcast->list, &remove_list);
880
881 rb_replace_node(&mcast->rb_node,
882 &nmcast->rb_node,
883 &priv->multicast_tree);
884 } else
885 __ipoib_mcast_add(dev, nmcast);
886
887 list_add_tail(&nmcast->list, &priv->multicast_list);
888 }
889
890 if (mcast)
891 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
892 }
893
894 /* Remove all of the entries don't exist anymore */
895 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
896 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) &&
897 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
898 ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n",
899 IPOIB_GID_ARG(mcast->mcmember.mgid));
900
901 rb_erase(&mcast->rb_node, &priv->multicast_tree);
902
903 /* Move to the remove list */
904 list_del(&mcast->list);
905 list_add_tail(&mcast->list, &remove_list);
906 }
907 }
908 spin_unlock_irqrestore(&priv->lock, flags);
909
910 /* We have to cancel outside of the spinlock */
911 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
912 ipoib_mcast_leave(mcast->dev, mcast);
913 ipoib_mcast_free(mcast);
914 }
915
916 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
917 ipoib_mcast_start_thread(dev);
918 }
919
920 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
921
922 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
923 {
924 struct ipoib_mcast_iter *iter;
925
926 iter = kmalloc(sizeof *iter, GFP_KERNEL);
927 if (!iter)
928 return NULL;
929
930 iter->dev = dev;
931 memset(iter->mgid.raw, 0, 16);
932
933 if (ipoib_mcast_iter_next(iter)) {
934 kfree(iter);
935 return NULL;
936 }
937
938 return iter;
939 }
940
941 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
942 {
943 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
944 struct rb_node *n;
945 struct ipoib_mcast *mcast;
946 int ret = 1;
947
948 spin_lock_irq(&priv->lock);
949
950 n = rb_first(&priv->multicast_tree);
951
952 while (n) {
953 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
954
955 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw,
956 sizeof (union ib_gid)) < 0) {
957 iter->mgid = mcast->mcmember.mgid;
958 iter->created = mcast->created;
959 iter->queuelen = skb_queue_len(&mcast->pkt_queue);
960 iter->complete = !!mcast->ah;
961 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY));
962
963 ret = 0;
964
965 break;
966 }
967
968 n = rb_next(n);
969 }
970
971 spin_unlock_irq(&priv->lock);
972
973 return ret;
974 }
975
976 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
977 union ib_gid *mgid,
978 unsigned long *created,
979 unsigned int *queuelen,
980 unsigned int *complete,
981 unsigned int *send_only)
982 {
983 *mgid = iter->mgid;
984 *created = iter->created;
985 *queuelen = iter->queuelen;
986 *complete = iter->complete;
987 *send_only = iter->send_only;
988 }
989
990 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
kernel source for telekom puls (alcatel/mediatek)