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.
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:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
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.
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
34 * $Id: ipoib_multicast.c 1362 2004-12-18 15:56:29Z roland $
37 #include <linux/skbuff.h>
38 #include <linux/rtnetlink.h>
41 #include <linux/igmp.h>
42 #include <linux/inetdevice.h>
43 #include <linux/delay.h>
44 #include <linux/completion.h>
50 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
51 static int mcast_debug_level;
53 module_param(mcast_debug_level, int, 0644);
54 MODULE_PARM_DESC(mcast_debug_level,
55 "Enable multicast debug tracing if > 0");
58 static DEFINE_MUTEX(mcast_mutex);
60 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
62 struct ib_sa_mcmember_rec mcmember;
65 struct rb_node rb_node;
66 struct list_head list;
67 struct completion done;
70 struct ib_sa_query *query;
72 unsigned long created;
73 unsigned long backoff;
76 unsigned char logcount;
78 struct list_head neigh_list;
80 struct sk_buff_head pkt_queue;
82 struct net_device *dev;
85 struct ipoib_mcast_iter {
86 struct net_device *dev;
88 unsigned long created;
89 unsigned int queuelen;
90 unsigned int complete;
91 unsigned int send_only;
94 static void ipoib_mcast_free(struct ipoib_mcast *mcast)
96 struct net_device *dev = mcast->dev;
97 struct ipoib_dev_priv *priv = netdev_priv(dev);
98 struct ipoib_neigh *neigh, *tmp;
102 ipoib_dbg_mcast(netdev_priv(dev),
103 "deleting multicast group " IPOIB_GID_FMT "\n",
104 IPOIB_GID_ARG(mcast->mcmember.mgid));
106 spin_lock_irqsave(&priv->lock, flags);
108 list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) {
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.
116 ipoib_put_ah(neigh->ah);
117 *to_ipoib_neigh(neigh->neighbour) = NULL;
118 neigh->neighbour->ops->destructor = NULL;
122 spin_unlock_irqrestore(&priv->lock, flags);
125 ipoib_put_ah(mcast->ah);
127 while (!skb_queue_empty(&mcast->pkt_queue)) {
129 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
132 spin_lock_irqsave(&priv->tx_lock, flags);
133 priv->stats.tx_dropped += tx_dropped;
134 spin_unlock_irqrestore(&priv->tx_lock, flags);
139 static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
142 struct ipoib_mcast *mcast;
144 mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
149 mcast->created = jiffies;
152 INIT_LIST_HEAD(&mcast->list);
153 INIT_LIST_HEAD(&mcast->neigh_list);
154 skb_queue_head_init(&mcast->pkt_queue);
159 static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_gid *mgid)
161 struct ipoib_dev_priv *priv = netdev_priv(dev);
162 struct rb_node *n = priv->multicast_tree.rb_node;
165 struct ipoib_mcast *mcast;
168 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
170 ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw,
171 sizeof (union ib_gid));
183 static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast)
185 struct ipoib_dev_priv *priv = netdev_priv(dev);
186 struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL;
189 struct ipoib_mcast *tmcast;
193 tmcast = rb_entry(pn, struct ipoib_mcast, rb_node);
195 ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw,
196 sizeof (union ib_gid));
205 rb_link_node(&mcast->rb_node, pn, n);
206 rb_insert_color(&mcast->rb_node, &priv->multicast_tree);
211 static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
212 struct ib_sa_mcmember_rec *mcmember)
214 struct net_device *dev = mcast->dev;
215 struct ipoib_dev_priv *priv = netdev_priv(dev);
219 mcast->mcmember = *mcmember;
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;
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));
237 ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid),
238 &mcast->mcmember.mgid);
240 ipoib_warn(priv, "couldn't attach QP to multicast group "
242 IPOIB_GID_ARG(mcast->mcmember.mgid));
244 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags);
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,
256 .flow_label = be32_to_cpu(mcast->mcmember.flow_label),
257 .hop_limit = mcast->mcmember.hop_limit,
259 .traffic_class = mcast->mcmember.traffic_class
262 int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate);
264 av.grh.dgid = mcast->mcmember.mgid;
266 if (path_rate > 0 && priv->local_rate > path_rate)
267 av.static_rate = (priv->local_rate - 1) / path_rate;
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));
273 ah = ipoib_create_ah(dev, priv->pd, &av);
275 ipoib_warn(priv, "ib_address_create failed\n");
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),
281 be16_to_cpu(mcast->mcmember.mlid),
285 spin_lock_irq(&priv->lock);
287 spin_unlock_irq(&priv->lock);
290 /* actually send any queued packets */
291 spin_lock_irq(&priv->tx_lock);
292 while (!skb_queue_empty(&mcast->pkt_queue)) {
293 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
294 spin_unlock_irq(&priv->tx_lock);
298 if (!skb->dst || !skb->dst->neighbour) {
299 /* put pseudoheader back on for next time */
300 skb_push(skb, sizeof (struct ipoib_pseudoheader));
303 if (dev_queue_xmit(skb))
304 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
305 spin_lock_irq(&priv->tx_lock);
307 spin_unlock_irq(&priv->tx_lock);
313 ipoib_mcast_sendonly_join_complete(int status,
314 struct ib_sa_mcmember_rec *mcmember,
317 struct ipoib_mcast *mcast = mcast_ptr;
318 struct net_device *dev = mcast->dev;
319 struct ipoib_dev_priv *priv = netdev_priv(dev);
322 ipoib_mcast_join_finish(mcast, mcmember);
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);
329 /* Flush out any queued packets */
330 spin_lock_irq(&priv->tx_lock);
331 while (!skb_queue_empty(&mcast->pkt_queue)) {
332 ++priv->stats.tx_dropped;
333 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
335 spin_unlock_irq(&priv->tx_lock);
337 /* Clear the busy flag so we try again */
338 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
341 complete(&mcast->done);
344 static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
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 */
357 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
358 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n");
362 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
363 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
367 rec.mgid = mcast->mcmember.mgid;
368 rec.port_gid = priv->local_gid;
369 rec.pkey = cpu_to_be16(priv->pkey);
371 init_completion(&mcast->done);
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,
379 ipoib_mcast_sendonly_join_complete,
380 mcast, &mcast->query);
382 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n",
385 ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT
387 IPOIB_GID_ARG(mcast->mcmember.mgid));
389 mcast->query_id = ret;
395 static void ipoib_mcast_join_complete(int status,
396 struct ib_sa_mcmember_rec *mcmember,
399 struct ipoib_mcast *mcast = mcast_ptr;
400 struct net_device *dev = mcast->dev;
401 struct ipoib_dev_priv *priv = netdev_priv(dev);
403 ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT
405 IPOIB_GID_ARG(mcast->mcmember.mgid), status);
407 if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) {
409 mutex_lock(&mcast_mutex);
410 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
411 queue_work(ipoib_workqueue, &priv->mcast_task);
412 mutex_unlock(&mcast_mutex);
413 complete(&mcast->done);
417 if (status == -EINTR) {
418 complete(&mcast->done);
422 if (status && mcast->logcount++ < 20) {
423 if (status == -ETIMEDOUT || status == -EINTR) {
424 ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT
426 IPOIB_GID_ARG(mcast->mcmember.mgid),
429 ipoib_warn(priv, "multicast join failed for "
430 IPOIB_GID_FMT ", status %d\n",
431 IPOIB_GID_ARG(mcast->mcmember.mgid),
437 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
438 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
440 mutex_lock(&mcast_mutex);
442 spin_lock_irq(&priv->lock);
445 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) {
446 if (status == -ETIMEDOUT)
447 queue_work(ipoib_workqueue, &priv->mcast_task);
449 queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
450 mcast->backoff * HZ);
452 complete(&mcast->done);
453 spin_unlock_irq(&priv->lock);
454 mutex_unlock(&mcast_mutex);
459 static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
462 struct ipoib_dev_priv *priv = netdev_priv(dev);
463 struct ib_sa_mcmember_rec rec = {
466 ib_sa_comp_mask comp_mask;
469 ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n",
470 IPOIB_GID_ARG(mcast->mcmember.mgid));
472 rec.mgid = mcast->mcmember.mgid;
473 rec.port_gid = priv->local_gid;
474 rec.pkey = cpu_to_be16(priv->pkey);
477 IB_SA_MCMEMBER_REC_MGID |
478 IB_SA_MCMEMBER_REC_PORT_GID |
479 IB_SA_MCMEMBER_REC_PKEY |
480 IB_SA_MCMEMBER_REC_JOIN_STATE;
484 IB_SA_MCMEMBER_REC_QKEY |
485 IB_SA_MCMEMBER_REC_SL |
486 IB_SA_MCMEMBER_REC_FLOW_LABEL |
487 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
489 rec.qkey = priv->broadcast->mcmember.qkey;
490 rec.sl = priv->broadcast->mcmember.sl;
491 rec.flow_label = priv->broadcast->mcmember.flow_label;
492 rec.traffic_class = priv->broadcast->mcmember.traffic_class;
495 init_completion(&mcast->done);
497 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask,
498 mcast->backoff * 1000, GFP_ATOMIC,
499 ipoib_mcast_join_complete,
500 mcast, &mcast->query);
503 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", ret);
506 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
507 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
509 mutex_lock(&mcast_mutex);
510 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
511 queue_delayed_work(ipoib_workqueue,
513 mcast->backoff * HZ);
514 mutex_unlock(&mcast_mutex);
516 mcast->query_id = ret;
519 void ipoib_mcast_join_task(void *dev_ptr)
521 struct net_device *dev = dev_ptr;
522 struct ipoib_dev_priv *priv = netdev_priv(dev);
524 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
527 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid))
528 ipoib_warn(priv, "ib_gid_entry_get() failed\n");
530 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
533 struct ib_port_attr attr;
535 if (!ib_query_port(priv->ca, priv->port, &attr)) {
536 priv->local_lid = attr.lid;
537 priv->local_rate = attr.active_speed *
538 ib_width_enum_to_int(attr.active_width);
540 ipoib_warn(priv, "ib_query_port failed\n");
543 if (!priv->broadcast) {
544 struct ipoib_mcast *broadcast;
546 broadcast = ipoib_mcast_alloc(dev, 1);
548 ipoib_warn(priv, "failed to allocate broadcast group\n");
549 mutex_lock(&mcast_mutex);
550 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
551 queue_delayed_work(ipoib_workqueue,
552 &priv->mcast_task, HZ);
553 mutex_unlock(&mcast_mutex);
557 spin_lock_irq(&priv->lock);
558 memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
559 sizeof (union ib_gid));
560 priv->broadcast = broadcast;
562 __ipoib_mcast_add(dev, priv->broadcast);
563 spin_unlock_irq(&priv->lock);
566 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
567 ipoib_mcast_join(dev, priv->broadcast, 0);
572 struct ipoib_mcast *mcast = NULL;
574 spin_lock_irq(&priv->lock);
575 list_for_each_entry(mcast, &priv->multicast_list, list) {
576 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)
577 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)
578 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
579 /* Found the next unjoined group */
583 spin_unlock_irq(&priv->lock);
585 if (&mcast->list == &priv->multicast_list) {
590 ipoib_mcast_join(dev, mcast, 1);
594 priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) -
596 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
598 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");
600 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
601 netif_carrier_on(dev);
604 int ipoib_mcast_start_thread(struct net_device *dev)
606 struct ipoib_dev_priv *priv = netdev_priv(dev);
608 ipoib_dbg_mcast(priv, "starting multicast thread\n");
610 mutex_lock(&mcast_mutex);
611 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
612 queue_work(ipoib_workqueue, &priv->mcast_task);
613 mutex_unlock(&mcast_mutex);
615 spin_lock_irq(&priv->lock);
616 set_bit(IPOIB_MCAST_STARTED, &priv->flags);
617 spin_unlock_irq(&priv->lock);
622 int ipoib_mcast_stop_thread(struct net_device *dev, int flush)
624 struct ipoib_dev_priv *priv = netdev_priv(dev);
625 struct ipoib_mcast *mcast;
627 ipoib_dbg_mcast(priv, "stopping multicast thread\n");
629 spin_lock_irq(&priv->lock);
630 clear_bit(IPOIB_MCAST_STARTED, &priv->flags);
631 spin_unlock_irq(&priv->lock);
633 mutex_lock(&mcast_mutex);
634 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
635 cancel_delayed_work(&priv->mcast_task);
636 mutex_unlock(&mcast_mutex);
639 flush_workqueue(ipoib_workqueue);
641 spin_lock_irq(&priv->lock);
642 if (priv->broadcast && priv->broadcast->query) {
643 ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query);
644 priv->broadcast->query = NULL;
645 spin_unlock_irq(&priv->lock);
646 ipoib_dbg_mcast(priv, "waiting for bcast\n");
647 wait_for_completion(&priv->broadcast->done);
649 spin_unlock_irq(&priv->lock);
651 list_for_each_entry(mcast, &priv->multicast_list, list) {
652 spin_lock_irq(&priv->lock);
654 ib_sa_cancel_query(mcast->query_id, mcast->query);
656 spin_unlock_irq(&priv->lock);
657 ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n",
658 IPOIB_GID_ARG(mcast->mcmember.mgid));
659 wait_for_completion(&mcast->done);
661 spin_unlock_irq(&priv->lock);
667 static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
669 struct ipoib_dev_priv *priv = netdev_priv(dev);
670 struct ib_sa_mcmember_rec rec = {
675 if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags))
678 ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n",
679 IPOIB_GID_ARG(mcast->mcmember.mgid));
681 rec.mgid = mcast->mcmember.mgid;
682 rec.port_gid = priv->local_gid;
683 rec.pkey = cpu_to_be16(priv->pkey);
685 /* Remove ourselves from the multicast group */
686 ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid),
687 &mcast->mcmember.mgid);
689 ipoib_warn(priv, "ipoib_mcast_detach failed (result = %d)\n", ret);
692 * Just make one shot at leaving and don't wait for a reply;
693 * if we fail, too bad.
695 ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec,
696 IB_SA_MCMEMBER_REC_MGID |
697 IB_SA_MCMEMBER_REC_PORT_GID |
698 IB_SA_MCMEMBER_REC_PKEY |
699 IB_SA_MCMEMBER_REC_JOIN_STATE,
701 mcast, &mcast->query);
703 ipoib_warn(priv, "ib_sa_mcmember_rec_delete failed "
704 "for leave (result = %d)\n", ret);
709 void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid,
712 struct ipoib_dev_priv *priv = netdev_priv(dev);
713 struct ipoib_mcast *mcast;
716 * We can only be called from ipoib_start_xmit, so we're
717 * inside tx_lock -- no need to save/restore flags.
719 spin_lock(&priv->lock);
721 if (!test_bit(IPOIB_MCAST_STARTED, &priv->flags) ||
723 !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
724 ++priv->stats.tx_dropped;
725 dev_kfree_skb_any(skb);
729 mcast = __ipoib_mcast_find(dev, mgid);
731 /* Let's create a new send only group now */
732 ipoib_dbg_mcast(priv, "setting up send only multicast group for "
733 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid));
735 mcast = ipoib_mcast_alloc(dev, 0);
737 ipoib_warn(priv, "unable to allocate memory for "
738 "multicast structure\n");
739 ++priv->stats.tx_dropped;
740 dev_kfree_skb_any(skb);
744 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
745 mcast->mcmember.mgid = *mgid;
746 __ipoib_mcast_add(dev, mcast);
747 list_add_tail(&mcast->list, &priv->multicast_list);
751 if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
752 skb_queue_tail(&mcast->pkt_queue, skb);
754 ++priv->stats.tx_dropped;
755 dev_kfree_skb_any(skb);
759 ipoib_dbg_mcast(priv, "no address vector, "
760 "but multicast join already started\n");
761 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
762 ipoib_mcast_sendonly_join(mcast);
765 * If lookup completes between here and out:, don't
766 * want to send packet twice.
772 if (mcast && mcast->ah) {
774 skb->dst->neighbour &&
775 !*to_ipoib_neigh(skb->dst->neighbour)) {
776 struct ipoib_neigh *neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
779 kref_get(&mcast->ah->ref);
780 neigh->ah = mcast->ah;
781 neigh->neighbour = skb->dst->neighbour;
782 *to_ipoib_neigh(skb->dst->neighbour) = neigh;
783 list_add_tail(&neigh->list, &mcast->neigh_list);
787 ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
791 spin_unlock(&priv->lock);
794 void ipoib_mcast_dev_flush(struct net_device *dev)
796 struct ipoib_dev_priv *priv = netdev_priv(dev);
797 LIST_HEAD(remove_list);
798 struct ipoib_mcast *mcast, *tmcast;
801 ipoib_dbg_mcast(priv, "flushing multicast list\n");
803 spin_lock_irqsave(&priv->lock, flags);
805 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
806 list_del(&mcast->list);
807 rb_erase(&mcast->rb_node, &priv->multicast_tree);
808 list_add_tail(&mcast->list, &remove_list);
811 if (priv->broadcast) {
812 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
813 list_add_tail(&priv->broadcast->list, &remove_list);
814 priv->broadcast = NULL;
817 spin_unlock_irqrestore(&priv->lock, flags);
819 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
820 ipoib_mcast_leave(dev, mcast);
821 ipoib_mcast_free(mcast);
825 void ipoib_mcast_restart_task(void *dev_ptr)
827 struct net_device *dev = dev_ptr;
828 struct ipoib_dev_priv *priv = netdev_priv(dev);
829 struct dev_mc_list *mclist;
830 struct ipoib_mcast *mcast, *tmcast;
831 LIST_HEAD(remove_list);
834 ipoib_dbg_mcast(priv, "restarting multicast task\n");
836 ipoib_mcast_stop_thread(dev, 0);
838 spin_lock_irqsave(&dev->xmit_lock, flags);
839 spin_lock(&priv->lock);
842 * Unfortunately, the networking core only gives us a list of all of
843 * the multicast hardware addresses. We need to figure out which ones
844 * are new and which ones have been removed
847 /* Clear out the found flag */
848 list_for_each_entry(mcast, &priv->multicast_list, list)
849 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
851 /* Mark all of the entries that are found or don't exist */
852 for (mclist = dev->mc_list; mclist; mclist = mclist->next) {
855 memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid);
857 /* Add in the P_Key */
858 mgid.raw[4] = (priv->pkey >> 8) & 0xff;
859 mgid.raw[5] = priv->pkey & 0xff;
861 mcast = __ipoib_mcast_find(dev, &mgid);
862 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
863 struct ipoib_mcast *nmcast;
865 /* Not found or send-only group, let's add a new entry */
866 ipoib_dbg_mcast(priv, "adding multicast entry for mgid "
867 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid));
869 nmcast = ipoib_mcast_alloc(dev, 0);
871 ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
875 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags);
877 nmcast->mcmember.mgid = mgid;
880 /* Destroy the send only entry */
881 list_del(&mcast->list);
882 list_add_tail(&mcast->list, &remove_list);
884 rb_replace_node(&mcast->rb_node,
886 &priv->multicast_tree);
888 __ipoib_mcast_add(dev, nmcast);
890 list_add_tail(&nmcast->list, &priv->multicast_list);
894 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
897 /* Remove all of the entries don't exist anymore */
898 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
899 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) &&
900 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
901 ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n",
902 IPOIB_GID_ARG(mcast->mcmember.mgid));
904 rb_erase(&mcast->rb_node, &priv->multicast_tree);
906 /* Move to the remove list */
907 list_del(&mcast->list);
908 list_add_tail(&mcast->list, &remove_list);
912 spin_unlock(&priv->lock);
913 spin_unlock_irqrestore(&dev->xmit_lock, flags);
915 /* We have to cancel outside of the spinlock */
916 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
917 ipoib_mcast_leave(mcast->dev, mcast);
918 ipoib_mcast_free(mcast);
921 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
922 ipoib_mcast_start_thread(dev);
925 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
927 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
929 struct ipoib_mcast_iter *iter;
931 iter = kmalloc(sizeof *iter, GFP_KERNEL);
936 memset(iter->mgid.raw, 0, 16);
938 if (ipoib_mcast_iter_next(iter)) {
946 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
948 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
950 struct ipoib_mcast *mcast;
953 spin_lock_irq(&priv->lock);
955 n = rb_first(&priv->multicast_tree);
958 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
960 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw,
961 sizeof (union ib_gid)) < 0) {
962 iter->mgid = mcast->mcmember.mgid;
963 iter->created = mcast->created;
964 iter->queuelen = skb_queue_len(&mcast->pkt_queue);
965 iter->complete = !!mcast->ah;
966 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY));
976 spin_unlock_irq(&priv->lock);
981 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
983 unsigned long *created,
984 unsigned int *queuelen,
985 unsigned int *complete,
986 unsigned int *send_only)
989 *created = iter->created;
990 *queuelen = iter->queuelen;
991 *complete = iter->complete;
992 *send_only = iter->send_only;
995 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */