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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / infiniband / ulp / ipoib / ipoib_multicast.c
blobf46932dc81c94385550e5d4534c332a9b0cb0b51
1 /*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 * $Id: ipoib_multicast.c 1362 2004-12-18 15:56:29Z roland $
33 */
34
35 #include <linux/skbuff.h>
36 #include <linux/rtnetlink.h>
37 #include <linux/ip.h>
38 #include <linux/in.h>
39 #include <linux/igmp.h>
40 #include <linux/inetdevice.h>
41 #include <linux/delay.h>
42 #include <linux/completion.h>
43
44 #include "ipoib.h"
45
46 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
47 static int mcast_debug_level;
48
49 module_param(mcast_debug_level, int, 0644);
50 MODULE_PARM_DESC(mcast_debug_level,
51 "Enable multicast debug tracing if > 0");
52 #endif
53
54 static DECLARE_MUTEX(mcast_mutex);
55
56 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
57 struct ipoib_mcast {
58 struct ib_sa_mcmember_rec mcmember;
59 struct ipoib_ah *ah;
60
61 struct rb_node rb_node;
62 struct list_head list;
63 struct completion done;
64
65 int query_id;
66 struct ib_sa_query *query;
67
68 unsigned long created;
69 unsigned long backoff;
70
71 unsigned long flags;
72 unsigned char logcount;
73
74 struct list_head neigh_list;
75
76 struct sk_buff_head pkt_queue;
77
78 struct net_device *dev;
79 };
80
81 struct ipoib_mcast_iter {
82 struct net_device *dev;
83 union ib_gid mgid;
84 unsigned long created;
85 unsigned int queuelen;
86 unsigned int complete;
87 unsigned int send_only;
88 };
89
90 static void ipoib_mcast_free(struct ipoib_mcast *mcast)
91 {
92 struct net_device *dev = mcast->dev;
93 struct ipoib_dev_priv *priv = netdev_priv(dev);
94 struct ipoib_neigh *neigh, *tmp;
95 unsigned long flags;
96 LIST_HEAD(ah_list);
97 struct ipoib_ah *ah, *tah;
98
99 ipoib_dbg_mcast(netdev_priv(dev),
100 "deleting multicast group " IPOIB_GID_FMT "\n",
101 IPOIB_GID_ARG(mcast->mcmember.mgid));
102
103 spin_lock_irqsave(&priv->lock, flags);
104
105 list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) {
106 if (neigh->ah)
107 list_add_tail(&neigh->ah->list, &ah_list);
108 *to_ipoib_neigh(neigh->neighbour) = NULL;
109 neigh->neighbour->ops->destructor = NULL;
110 kfree(neigh);
111 }
112
113 spin_unlock_irqrestore(&priv->lock, flags);
114
115 list_for_each_entry_safe(ah, tah, &ah_list, list)
116 ipoib_put_ah(ah);
117
118 if (mcast->ah)
119 ipoib_put_ah(mcast->ah);
120
121 while (!skb_queue_empty(&mcast->pkt_queue)) {
122 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
123
124 skb->dev = dev;
125 dev_kfree_skb_any(skb);
126 }
127
128 kfree(mcast);
129 }
130
131 static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
132 int can_sleep)
133 {
134 struct ipoib_mcast *mcast;
135
136 mcast = kmalloc(sizeof (*mcast), can_sleep ? GFP_KERNEL : GFP_ATOMIC);
137 if (!mcast)
138 return NULL;
139
140 memset(mcast, 0, sizeof (*mcast));
141
142 init_completion(&mcast->done);
143
144 mcast->dev = dev;
145 mcast->created = jiffies;
146 mcast->backoff = HZ;
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
262 av.grh.dgid = mcast->mcmember.mgid;
263
264 if (ib_sa_rate_enum_to_int(mcast->mcmember.rate) > 0)
265 av.static_rate = (2 * priv->local_rate -
266 ib_sa_rate_enum_to_int(mcast->mcmember.rate) - 1) /
267 (priv->local_rate ? priv->local_rate : 1);
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
273 mcast->ah = ipoib_create_ah(dev, priv->pd, &av);
274 if (!mcast->ah) {
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 }
284 }
285
286 /* actually send any queued packets */
287 while (!skb_queue_empty(&mcast->pkt_queue)) {
288 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
289
290 skb->dev = dev;
291
292 if (!skb->dst || !skb->dst->neighbour) {
293 /* put pseudoheader back on for next time */
294 skb_push(skb, sizeof (struct ipoib_pseudoheader));
295 }
296
297 if (dev_queue_xmit(skb))
298 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
299 }
300
301 return 0;
302 }
303
304 static void
305 ipoib_mcast_sendonly_join_complete(int status,
306 struct ib_sa_mcmember_rec *mcmember,
307 void *mcast_ptr)
308 {
309 struct ipoib_mcast *mcast = mcast_ptr;
310 struct net_device *dev = mcast->dev;
311
312 if (!status)
313 ipoib_mcast_join_finish(mcast, mcmember);
314 else {
315 if (mcast->logcount++ < 20)
316 ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for "
317 IPOIB_GID_FMT ", status %d\n",
318 IPOIB_GID_ARG(mcast->mcmember.mgid), status);
319
320 /* Flush out any queued packets */
321 while (!skb_queue_empty(&mcast->pkt_queue)) {
322 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
323
324 skb->dev = dev;
325
326 dev_kfree_skb_any(skb);
327 }
328
329 /* Clear the busy flag so we try again */
330 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
331 }
332
333 complete(&mcast->done);
334 }
335
336 static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
337 {
338 struct net_device *dev = mcast->dev;
339 struct ipoib_dev_priv *priv = netdev_priv(dev);
340 struct ib_sa_mcmember_rec rec = {
341 #if 0 /* Some SMs don't support send-only yet */
342 .join_state = 4
343 #else
344 .join_state = 1
345 #endif
346 };
347 int ret = 0;
348
349 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
350 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n");
351 return -ENODEV;
352 }
353
354 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
355 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
356 return -EBUSY;
357 }
358
359 rec.mgid = mcast->mcmember.mgid;
360 rec.port_gid = priv->local_gid;
361 rec.pkey = be16_to_cpu(priv->pkey);
362
363 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec,
364 IB_SA_MCMEMBER_REC_MGID |
365 IB_SA_MCMEMBER_REC_PORT_GID |
366 IB_SA_MCMEMBER_REC_PKEY |
367 IB_SA_MCMEMBER_REC_JOIN_STATE,
368 1000, GFP_ATOMIC,
369 ipoib_mcast_sendonly_join_complete,
370 mcast, &mcast->query);
371 if (ret < 0) {
372 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n",
373 ret);
374 } else {
375 ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT
376 ", starting join\n",
377 IPOIB_GID_ARG(mcast->mcmember.mgid));
378
379 mcast->query_id = ret;
380 }
381
382 return ret;
383 }
384
385 static void ipoib_mcast_join_complete(int status,
386 struct ib_sa_mcmember_rec *mcmember,
387 void *mcast_ptr)
388 {
389 struct ipoib_mcast *mcast = mcast_ptr;
390 struct net_device *dev = mcast->dev;
391 struct ipoib_dev_priv *priv = netdev_priv(dev);
392
393 ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT
394 " (status %d)\n",
395 IPOIB_GID_ARG(mcast->mcmember.mgid), status);
396
397 if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) {
398 mcast->backoff = HZ;
399 down(&mcast_mutex);
400 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
401 queue_work(ipoib_workqueue, &priv->mcast_task);
402 up(&mcast_mutex);
403 complete(&mcast->done);
404 return;
405 }
406
407 if (status == -EINTR) {
408 complete(&mcast->done);
409 return;
410 }
411
412 if (status && mcast->logcount++ < 20) {
413 if (status == -ETIMEDOUT || status == -EINTR) {
414 ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT
415 ", status %d\n",
416 IPOIB_GID_ARG(mcast->mcmember.mgid),
417 status);
418 } else {
419 ipoib_warn(priv, "multicast join failed for "
420 IPOIB_GID_FMT ", status %d\n",
421 IPOIB_GID_ARG(mcast->mcmember.mgid),
422 status);
423 }
424 }
425
426 mcast->backoff *= 2;
427 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
428 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
429
430 mcast->query = NULL;
431
432 down(&mcast_mutex);
433 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) {
434 if (status == -ETIMEDOUT)
435 queue_work(ipoib_workqueue, &priv->mcast_task);
436 else
437 queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
438 mcast->backoff * HZ);
439 } else
440 complete(&mcast->done);
441 up(&mcast_mutex);
442
443 return;
444 }
445
446 static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
447 int create)
448 {
449 struct ipoib_dev_priv *priv = netdev_priv(dev);
450 struct ib_sa_mcmember_rec rec = {
451 .join_state = 1
452 };
453 ib_sa_comp_mask comp_mask;
454 int ret = 0;
455
456 ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n",
457 IPOIB_GID_ARG(mcast->mcmember.mgid));
458
459 rec.mgid = mcast->mcmember.mgid;
460 rec.port_gid = priv->local_gid;
461 rec.pkey = be16_to_cpu(priv->pkey);
462
463 comp_mask =
464 IB_SA_MCMEMBER_REC_MGID |
465 IB_SA_MCMEMBER_REC_PORT_GID |
466 IB_SA_MCMEMBER_REC_PKEY |
467 IB_SA_MCMEMBER_REC_JOIN_STATE;
468
469 if (create) {
470 comp_mask |=
471 IB_SA_MCMEMBER_REC_QKEY |
472 IB_SA_MCMEMBER_REC_SL |
473 IB_SA_MCMEMBER_REC_FLOW_LABEL |
474 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
475
476 rec.qkey = priv->broadcast->mcmember.qkey;
477 rec.sl = priv->broadcast->mcmember.sl;
478 rec.flow_label = priv->broadcast->mcmember.flow_label;
479 rec.traffic_class = priv->broadcast->mcmember.traffic_class;
480 }
481
482 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask,
483 mcast->backoff * 1000, GFP_ATOMIC,
484 ipoib_mcast_join_complete,
485 mcast, &mcast->query);
486
487 if (ret < 0) {
488 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", ret);
489
490 mcast->backoff *= 2;
491 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
492 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
493
494 down(&mcast_mutex);
495 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
496 queue_delayed_work(ipoib_workqueue,
497 &priv->mcast_task,
498 mcast->backoff);
499 up(&mcast_mutex);
500 } else
501 mcast->query_id = ret;
502 }
503
504 void ipoib_mcast_join_task(void *dev_ptr)
505 {
506 struct net_device *dev = dev_ptr;
507 struct ipoib_dev_priv *priv = netdev_priv(dev);
508
509 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
510 return;
511
512 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid))
513 ipoib_warn(priv, "ib_gid_entry_get() failed\n");
514 else
515 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
516
517 {
518 struct ib_port_attr attr;
519
520 if (!ib_query_port(priv->ca, priv->port, &attr)) {
521 priv->local_lid = attr.lid;
522 priv->local_rate = attr.active_speed *
523 ib_width_enum_to_int(attr.active_width);
524 } else
525 ipoib_warn(priv, "ib_query_port failed\n");
526 }
527
528 if (!priv->broadcast) {
529 priv->broadcast = ipoib_mcast_alloc(dev, 1);
530 if (!priv->broadcast) {
531 ipoib_warn(priv, "failed to allocate broadcast group\n");
532 down(&mcast_mutex);
533 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
534 queue_delayed_work(ipoib_workqueue,
535 &priv->mcast_task, HZ);
536 up(&mcast_mutex);
537 return;
538 }
539
540 memcpy(priv->broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
541 sizeof (union ib_gid));
542
543 spin_lock_irq(&priv->lock);
544 __ipoib_mcast_add(dev, priv->broadcast);
545 spin_unlock_irq(&priv->lock);
546 }
547
548 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
549 ipoib_mcast_join(dev, priv->broadcast, 0);
550 return;
551 }
552
553 while (1) {
554 struct ipoib_mcast *mcast = NULL;
555
556 spin_lock_irq(&priv->lock);
557 list_for_each_entry(mcast, &priv->multicast_list, list) {
558 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)
559 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)
560 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
561 /* Found the next unjoined group */
562 break;
563 }
564 }
565 spin_unlock_irq(&priv->lock);
566
567 if (&mcast->list == &priv->multicast_list) {
568 /* All done */
569 break;
570 }
571
572 ipoib_mcast_join(dev, mcast, 1);
573 return;
574 }
575
576 priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) -
577 IPOIB_ENCAP_LEN;
578 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
579
580 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");
581
582 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
583 netif_carrier_on(dev);
584 }
585
586 int ipoib_mcast_start_thread(struct net_device *dev)
587 {
588 struct ipoib_dev_priv *priv = netdev_priv(dev);
589
590 ipoib_dbg_mcast(priv, "starting multicast thread\n");
591
592 down(&mcast_mutex);
593 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
594 queue_work(ipoib_workqueue, &priv->mcast_task);
595 up(&mcast_mutex);
596
597 return 0;
598 }
599
600 int ipoib_mcast_stop_thread(struct net_device *dev)
601 {
602 struct ipoib_dev_priv *priv = netdev_priv(dev);
603 struct ipoib_mcast *mcast;
604
605 ipoib_dbg_mcast(priv, "stopping multicast thread\n");
606
607 down(&mcast_mutex);
608 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
609 cancel_delayed_work(&priv->mcast_task);
610 up(&mcast_mutex);
611
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 = be16_to_cpu(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);
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 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
921 {
922 struct ipoib_mcast_iter *iter;
923
924 iter = kmalloc(sizeof *iter, GFP_KERNEL);
925 if (!iter)
926 return NULL;
927
928 iter->dev = dev;
929 memset(iter->mgid.raw, 0, sizeof iter->mgid);
930
931 if (ipoib_mcast_iter_next(iter)) {
932 ipoib_mcast_iter_free(iter);
933 return NULL;
934 }
935
936 return iter;
937 }
938
939 void ipoib_mcast_iter_free(struct ipoib_mcast_iter *iter)
940 {
941 kfree(iter);
942 }
943
944 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
945 {
946 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
947 struct rb_node *n;
948 struct ipoib_mcast *mcast;
949 int ret = 1;
950
951 spin_lock_irq(&priv->lock);
952
953 n = rb_first(&priv->multicast_tree);
954
955 while (n) {
956 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
957
958 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw,
959 sizeof (union ib_gid)) < 0) {
960 iter->mgid = mcast->mcmember.mgid;
961 iter->created = mcast->created;
962 iter->queuelen = skb_queue_len(&mcast->pkt_queue);
963 iter->complete = !!mcast->ah;
964 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY));
965
966 ret = 0;
967
968 break;
969 }
970
971 n = rb_next(n);
972 }
973
974 spin_unlock_irq(&priv->lock);
975
976 return ret;
977 }
978
979 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
980 union ib_gid *mgid,
981 unsigned long *created,
982 unsigned int *queuelen,
983 unsigned int *complete,
984 unsigned int *send_only)
985 {
986 *mgid = iter->mgid;
987 *created = iter->created;
988 *queuelen = iter->queuelen;
989 *complete = iter->complete;
990 *send_only = iter->send_only;
991 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree