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
35 #include <linux/skbuff.h>
36 #include <linux/rtnetlink.h>
37 #include <linux/moduleparam.h>
40 #include <linux/igmp.h>
41 #include <linux/inetdevice.h>
42 #include <linux/delay.h>
43 #include <linux/completion.h>
44 #include <linux/slab.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 struct ipoib_mcast_iter {
59 struct net_device *dev;
61 unsigned long created;
62 unsigned int queuelen;
63 unsigned int complete;
64 unsigned int send_only;
68 * This should be called with the priv->lock held
70 static void __ipoib_mcast_schedule_join_thread(struct ipoib_dev_priv *priv,
71 struct ipoib_mcast *mcast,
74 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
78 * We will be scheduling *something*, so cancel whatever is
79 * currently scheduled first
81 cancel_delayed_work(&priv->mcast_task);
84 * We had a failure and want to schedule a retry later
87 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
88 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
89 mcast->delay_until = jiffies + (mcast->backoff * HZ);
91 * Mark this mcast for its delay, but restart the
92 * task immediately. The join task will make sure to
93 * clear out all entries without delays, and then
94 * schedule itself to run again when the earliest
97 queue_delayed_work(priv->wq, &priv->mcast_task, 0);
100 * Special case of retrying after a failure to
101 * allocate the broadcast multicast group, wait
102 * 1 second and try again
104 queue_delayed_work(priv->wq, &priv->mcast_task, HZ);
106 queue_delayed_work(priv->wq, &priv->mcast_task, 0);
109 static void ipoib_mcast_free(struct ipoib_mcast *mcast)
111 struct net_device *dev = mcast->dev;
114 ipoib_dbg_mcast(netdev_priv(dev), "deleting multicast group %pI6\n",
115 mcast->mcmember.mgid.raw);
117 /* remove all neigh connected to this mcast */
118 ipoib_del_neighs_by_gid(dev, mcast->mcmember.mgid.raw);
121 ipoib_put_ah(mcast->ah);
123 while (!skb_queue_empty(&mcast->pkt_queue)) {
125 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
128 netif_tx_lock_bh(dev);
129 dev->stats.tx_dropped += tx_dropped;
130 netif_tx_unlock_bh(dev);
135 static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
138 struct ipoib_mcast *mcast;
140 mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
145 mcast->created = jiffies;
146 mcast->delay_until = jiffies;
149 INIT_LIST_HEAD(&mcast->list);
150 INIT_LIST_HEAD(&mcast->neigh_list);
151 skb_queue_head_init(&mcast->pkt_queue);
156 static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid)
158 struct ipoib_dev_priv *priv = netdev_priv(dev);
159 struct rb_node *n = priv->multicast_tree.rb_node;
162 struct ipoib_mcast *mcast;
165 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
167 ret = memcmp(mgid, mcast->mcmember.mgid.raw,
168 sizeof (union ib_gid));
180 static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast)
182 struct ipoib_dev_priv *priv = netdev_priv(dev);
183 struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL;
186 struct ipoib_mcast *tmcast;
190 tmcast = rb_entry(pn, struct ipoib_mcast, rb_node);
192 ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw,
193 sizeof (union ib_gid));
202 rb_link_node(&mcast->rb_node, pn, n);
203 rb_insert_color(&mcast->rb_node, &priv->multicast_tree);
208 static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
209 struct ib_sa_mcmember_rec *mcmember)
211 struct net_device *dev = mcast->dev;
212 struct ipoib_dev_priv *priv = netdev_priv(dev);
217 mcast->mcmember = *mcmember;
219 /* Set the multicast MTU and cached Q_Key before we attach if it's
220 * the broadcast group.
222 if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
223 sizeof (union ib_gid))) {
224 spin_lock_irq(&priv->lock);
225 if (!priv->broadcast) {
226 spin_unlock_irq(&priv->lock);
229 /*update priv member according to the new mcast*/
230 priv->broadcast->mcmember.qkey = mcmember->qkey;
231 priv->broadcast->mcmember.mtu = mcmember->mtu;
232 priv->broadcast->mcmember.traffic_class = mcmember->traffic_class;
233 priv->broadcast->mcmember.rate = mcmember->rate;
234 priv->broadcast->mcmember.sl = mcmember->sl;
235 priv->broadcast->mcmember.flow_label = mcmember->flow_label;
236 priv->broadcast->mcmember.hop_limit = mcmember->hop_limit;
237 /* assume if the admin and the mcast are the same both can be changed */
238 if (priv->mcast_mtu == priv->admin_mtu)
241 IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu));
244 IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu));
246 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey);
247 spin_unlock_irq(&priv->lock);
248 priv->tx_wr.wr.ud.remote_qkey = priv->qkey;
252 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
253 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
254 ipoib_warn(priv, "multicast group %pI6 already attached\n",
255 mcast->mcmember.mgid.raw);
260 ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid),
261 &mcast->mcmember.mgid, set_qkey);
263 ipoib_warn(priv, "couldn't attach QP to multicast group %pI6\n",
264 mcast->mcmember.mgid.raw);
266 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags);
272 struct ib_ah_attr av = {
273 .dlid = be16_to_cpu(mcast->mcmember.mlid),
274 .port_num = priv->port,
275 .sl = mcast->mcmember.sl,
276 .ah_flags = IB_AH_GRH,
277 .static_rate = mcast->mcmember.rate,
279 .flow_label = be32_to_cpu(mcast->mcmember.flow_label),
280 .hop_limit = mcast->mcmember.hop_limit,
282 .traffic_class = mcast->mcmember.traffic_class
285 av.grh.dgid = mcast->mcmember.mgid;
287 ah = ipoib_create_ah(dev, priv->pd, &av);
289 ipoib_warn(priv, "ib_address_create failed %ld\n",
291 /* use original error */
294 spin_lock_irq(&priv->lock);
296 spin_unlock_irq(&priv->lock);
298 ipoib_dbg_mcast(priv, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n",
299 mcast->mcmember.mgid.raw,
301 be16_to_cpu(mcast->mcmember.mlid),
306 /* actually send any queued packets */
307 netif_tx_lock_bh(dev);
308 while (!skb_queue_empty(&mcast->pkt_queue)) {
309 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
311 netif_tx_unlock_bh(dev);
314 if (dev_queue_xmit(skb))
315 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
317 netif_tx_lock_bh(dev);
319 netif_tx_unlock_bh(dev);
324 void ipoib_mcast_carrier_on_task(struct work_struct *work)
326 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv,
328 struct ib_port_attr attr;
330 if (ib_query_port(priv->ca, priv->port, &attr) ||
331 attr.state != IB_PORT_ACTIVE) {
332 ipoib_dbg(priv, "Keeping carrier off until IB port is active\n");
337 * Take rtnl_lock to avoid racing with ipoib_stop() and
338 * turning the carrier back on while a device is being
339 * removed. However, ipoib_stop() will attempt to flush
340 * the workqueue while holding the rtnl lock, so loop
341 * on trylock until either we get the lock or we see
342 * FLAG_OPER_UP go away as that signals that we are bailing
343 * and can safely ignore the carrier on work.
345 while (!rtnl_trylock()) {
346 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags))
351 if (!ipoib_cm_admin_enabled(priv->dev))
352 dev_set_mtu(priv->dev, min(priv->mcast_mtu, priv->admin_mtu));
353 netif_carrier_on(priv->dev);
357 static int ipoib_mcast_join_complete(int status,
358 struct ib_sa_multicast *multicast)
360 struct ipoib_mcast *mcast = multicast->context;
361 struct net_device *dev = mcast->dev;
362 struct ipoib_dev_priv *priv = netdev_priv(dev);
364 ipoib_dbg_mcast(priv, "%sjoin completion for %pI6 (status %d)\n",
365 test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ?
367 mcast->mcmember.mgid.raw, status);
369 /* We trap for port events ourselves. */
370 if (status == -ENETRESET) {
376 status = ipoib_mcast_join_finish(mcast, &multicast->rec);
380 mcast->delay_until = jiffies;
383 * Defer carrier on work to priv->wq to avoid a
384 * deadlock on rtnl_lock here. Requeue our multicast
385 * work too, which will end up happening right after
386 * our carrier on task work and will allow us to
387 * send out all of the non-broadcast joins
389 if (mcast == priv->broadcast) {
390 spin_lock_irq(&priv->lock);
391 queue_work(priv->wq, &priv->carrier_on_task);
392 __ipoib_mcast_schedule_join_thread(priv, NULL, 0);
396 if (mcast->logcount++ < 20) {
397 if (status == -ETIMEDOUT || status == -EAGAIN) {
398 ipoib_dbg_mcast(priv, "%smulticast join failed for %pI6, status %d\n",
399 test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "",
400 mcast->mcmember.mgid.raw, status);
402 ipoib_warn(priv, "%smulticast join failed for %pI6, status %d\n",
403 test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "",
404 mcast->mcmember.mgid.raw, status);
408 if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) &&
409 mcast->backoff >= 2) {
411 * We only retry sendonly joins once before we drop
412 * the packet and quit trying to deal with the
413 * group. However, we leave the group in the
414 * mcast list as an unjoined group. If we want to
415 * try joining again, we simply queue up a packet
416 * and restart the join thread. The empty queue
417 * is why the join thread ignores this group.
420 netif_tx_lock_bh(dev);
421 while (!skb_queue_empty(&mcast->pkt_queue)) {
422 ++dev->stats.tx_dropped;
423 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
425 netif_tx_unlock_bh(dev);
427 spin_lock_irq(&priv->lock);
428 /* Requeue this join task with a backoff delay */
429 __ipoib_mcast_schedule_join_thread(priv, mcast, 1);
434 spin_lock_irq(&priv->lock);
437 * Make sure to set mcast->mc before we clear the busy flag to avoid
438 * racing with code that checks for BUSY before checking mcast->mc
443 mcast->mc = multicast;
444 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
445 spin_unlock_irq(&priv->lock);
446 complete(&mcast->done);
451 static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
454 struct ipoib_dev_priv *priv = netdev_priv(dev);
455 struct ib_sa_multicast *multicast;
456 struct ib_sa_mcmember_rec rec = {
459 ib_sa_comp_mask comp_mask;
462 ipoib_dbg_mcast(priv, "joining MGID %pI6\n", mcast->mcmember.mgid.raw);
464 rec.mgid = mcast->mcmember.mgid;
465 rec.port_gid = priv->local_gid;
466 rec.pkey = cpu_to_be16(priv->pkey);
469 IB_SA_MCMEMBER_REC_MGID |
470 IB_SA_MCMEMBER_REC_PORT_GID |
471 IB_SA_MCMEMBER_REC_PKEY |
472 IB_SA_MCMEMBER_REC_JOIN_STATE;
476 IB_SA_MCMEMBER_REC_QKEY |
477 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
478 IB_SA_MCMEMBER_REC_MTU |
479 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS |
480 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
481 IB_SA_MCMEMBER_REC_RATE |
482 IB_SA_MCMEMBER_REC_SL |
483 IB_SA_MCMEMBER_REC_FLOW_LABEL |
484 IB_SA_MCMEMBER_REC_HOP_LIMIT;
486 rec.qkey = priv->broadcast->mcmember.qkey;
487 rec.mtu_selector = IB_SA_EQ;
488 rec.mtu = priv->broadcast->mcmember.mtu;
489 rec.traffic_class = priv->broadcast->mcmember.traffic_class;
490 rec.rate_selector = IB_SA_EQ;
491 rec.rate = priv->broadcast->mcmember.rate;
492 rec.sl = priv->broadcast->mcmember.sl;
493 rec.flow_label = priv->broadcast->mcmember.flow_label;
494 rec.hop_limit = priv->broadcast->mcmember.hop_limit;
497 multicast = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port,
498 &rec, comp_mask, GFP_KERNEL,
499 ipoib_mcast_join_complete, mcast);
500 if (IS_ERR(multicast)) {
501 ret = PTR_ERR(multicast);
502 ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret);
503 spin_lock_irq(&priv->lock);
504 /* Requeue this join task with a backoff delay */
505 __ipoib_mcast_schedule_join_thread(priv, mcast, 1);
506 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
507 spin_unlock_irq(&priv->lock);
508 complete(&mcast->done);
512 void ipoib_mcast_join_task(struct work_struct *work)
514 struct ipoib_dev_priv *priv =
515 container_of(work, struct ipoib_dev_priv, mcast_task.work);
516 struct net_device *dev = priv->dev;
517 struct ib_port_attr port_attr;
518 unsigned long delay_until = 0;
519 struct ipoib_mcast *mcast = NULL;
522 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
525 if (ib_query_port(priv->ca, priv->port, &port_attr) ||
526 port_attr.state != IB_PORT_ACTIVE) {
527 ipoib_dbg(priv, "port state is not ACTIVE (state = %d) suspending join task\n",
531 priv->local_lid = port_attr.lid;
533 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid))
534 ipoib_warn(priv, "ib_query_gid() failed\n");
536 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
538 spin_lock_irq(&priv->lock);
539 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags))
542 if (!priv->broadcast) {
543 struct ipoib_mcast *broadcast;
545 broadcast = ipoib_mcast_alloc(dev, 0);
547 ipoib_warn(priv, "failed to allocate broadcast group\n");
549 * Restart us after a 1 second delay to retry
550 * creating our broadcast group and attaching to
551 * it. Until this succeeds, this ipoib dev is
552 * completely stalled (multicast wise).
554 __ipoib_mcast_schedule_join_thread(priv, NULL, 1);
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);
565 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
566 if (IS_ERR_OR_NULL(priv->broadcast->mc) &&
567 !test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags)) {
568 mcast = priv->broadcast;
570 if (mcast->backoff > 1 &&
571 time_before(jiffies, mcast->delay_until)) {
572 delay_until = mcast->delay_until;
580 * We'll never get here until the broadcast group is both allocated
583 list_for_each_entry(mcast, &priv->multicast_list, list) {
584 if (IS_ERR_OR_NULL(mcast->mc) &&
585 !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) &&
586 (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ||
587 !skb_queue_empty(&mcast->pkt_queue))) {
588 if (mcast->backoff == 1 ||
589 time_after_eq(jiffies, mcast->delay_until)) {
590 /* Found the next unjoined group */
591 init_completion(&mcast->done);
592 set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
593 if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
597 spin_unlock_irq(&priv->lock);
598 ipoib_mcast_join(dev, mcast, create);
599 spin_lock_irq(&priv->lock);
600 } else if (!delay_until ||
601 time_before(mcast->delay_until, delay_until))
602 delay_until = mcast->delay_until;
607 ipoib_dbg_mcast(priv, "successfully started all multicast joins\n");
611 cancel_delayed_work(&priv->mcast_task);
612 queue_delayed_work(priv->wq, &priv->mcast_task,
613 delay_until - jiffies);
616 init_completion(&mcast->done);
617 set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
619 spin_unlock_irq(&priv->lock);
621 ipoib_mcast_join(dev, mcast, create);
624 int ipoib_mcast_start_thread(struct net_device *dev)
626 struct ipoib_dev_priv *priv = netdev_priv(dev);
629 ipoib_dbg_mcast(priv, "starting multicast thread\n");
631 spin_lock_irqsave(&priv->lock, flags);
632 set_bit(IPOIB_MCAST_RUN, &priv->flags);
633 __ipoib_mcast_schedule_join_thread(priv, NULL, 0);
634 spin_unlock_irqrestore(&priv->lock, flags);
639 int ipoib_mcast_stop_thread(struct net_device *dev)
641 struct ipoib_dev_priv *priv = netdev_priv(dev);
644 ipoib_dbg_mcast(priv, "stopping multicast thread\n");
646 spin_lock_irqsave(&priv->lock, flags);
647 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
648 cancel_delayed_work(&priv->mcast_task);
649 spin_unlock_irqrestore(&priv->lock, flags);
651 flush_workqueue(priv->wq);
656 static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
658 struct ipoib_dev_priv *priv = netdev_priv(dev);
661 if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
662 ipoib_warn(priv, "ipoib_mcast_leave on an in-flight join\n");
664 if (!IS_ERR_OR_NULL(mcast->mc))
665 ib_sa_free_multicast(mcast->mc);
667 if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
668 ipoib_dbg_mcast(priv, "leaving MGID %pI6\n",
669 mcast->mcmember.mgid.raw);
671 /* Remove ourselves from the multicast group */
672 ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid,
673 be16_to_cpu(mcast->mcmember.mlid));
675 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
676 } else if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
677 ipoib_dbg(priv, "leaving with no mcmember but not a "
683 void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb)
685 struct ipoib_dev_priv *priv = netdev_priv(dev);
686 struct ipoib_mcast *mcast;
688 void *mgid = daddr + 4;
690 spin_lock_irqsave(&priv->lock, flags);
692 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) ||
694 !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
695 ++dev->stats.tx_dropped;
696 dev_kfree_skb_any(skb);
700 mcast = __ipoib_mcast_find(dev, mgid);
701 if (!mcast || !mcast->ah) {
703 /* Let's create a new send only group now */
704 ipoib_dbg_mcast(priv, "setting up send only multicast group for %pI6\n",
707 mcast = ipoib_mcast_alloc(dev, 0);
709 ipoib_warn(priv, "unable to allocate memory "
710 "for multicast structure\n");
711 ++dev->stats.tx_dropped;
712 dev_kfree_skb_any(skb);
716 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
717 memcpy(mcast->mcmember.mgid.raw, mgid,
718 sizeof (union ib_gid));
719 __ipoib_mcast_add(dev, mcast);
720 list_add_tail(&mcast->list, &priv->multicast_list);
722 if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
723 skb_queue_tail(&mcast->pkt_queue, skb);
725 ++dev->stats.tx_dropped;
726 dev_kfree_skb_any(skb);
728 if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
729 __ipoib_mcast_schedule_join_thread(priv, NULL, 0);
732 struct ipoib_neigh *neigh;
734 spin_unlock_irqrestore(&priv->lock, flags);
735 neigh = ipoib_neigh_get(dev, daddr);
736 spin_lock_irqsave(&priv->lock, flags);
738 neigh = ipoib_neigh_alloc(daddr, dev);
740 kref_get(&mcast->ah->ref);
741 neigh->ah = mcast->ah;
742 list_add_tail(&neigh->list, &mcast->neigh_list);
745 spin_unlock_irqrestore(&priv->lock, flags);
746 ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
748 ipoib_neigh_put(neigh);
753 spin_unlock_irqrestore(&priv->lock, flags);
756 void ipoib_mcast_dev_flush(struct net_device *dev)
758 struct ipoib_dev_priv *priv = netdev_priv(dev);
759 LIST_HEAD(remove_list);
760 struct ipoib_mcast *mcast, *tmcast;
763 ipoib_dbg_mcast(priv, "flushing multicast list\n");
765 spin_lock_irqsave(&priv->lock, flags);
767 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
768 list_del(&mcast->list);
769 rb_erase(&mcast->rb_node, &priv->multicast_tree);
770 list_add_tail(&mcast->list, &remove_list);
773 if (priv->broadcast) {
774 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
775 list_add_tail(&priv->broadcast->list, &remove_list);
776 priv->broadcast = NULL;
779 spin_unlock_irqrestore(&priv->lock, flags);
782 * make sure the in-flight joins have finished before we attempt
785 list_for_each_entry_safe(mcast, tmcast, &remove_list, list)
786 if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
787 wait_for_completion(&mcast->done);
789 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
790 ipoib_mcast_leave(dev, mcast);
791 ipoib_mcast_free(mcast);
795 static int ipoib_mcast_addr_is_valid(const u8 *addr, const u8 *broadcast)
797 /* reserved QPN, prefix, scope */
798 if (memcmp(addr, broadcast, 6))
800 /* signature lower, pkey */
801 if (memcmp(addr + 7, broadcast + 7, 3))
806 void ipoib_mcast_restart_task(struct work_struct *work)
808 struct ipoib_dev_priv *priv =
809 container_of(work, struct ipoib_dev_priv, restart_task);
810 struct net_device *dev = priv->dev;
811 struct netdev_hw_addr *ha;
812 struct ipoib_mcast *mcast, *tmcast;
813 LIST_HEAD(remove_list);
815 struct ib_sa_mcmember_rec rec;
817 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags))
819 * shortcut...on shutdown flush is called next, just
820 * let it do all the work
824 ipoib_dbg_mcast(priv, "restarting multicast task\n");
826 local_irq_save(flags);
827 netif_addr_lock(dev);
828 spin_lock(&priv->lock);
831 * Unfortunately, the networking core only gives us a list of all of
832 * the multicast hardware addresses. We need to figure out which ones
833 * are new and which ones have been removed
836 /* Clear out the found flag */
837 list_for_each_entry(mcast, &priv->multicast_list, list)
838 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
840 /* Mark all of the entries that are found or don't exist */
841 netdev_for_each_mc_addr(ha, dev) {
844 if (!ipoib_mcast_addr_is_valid(ha->addr, dev->broadcast))
847 memcpy(mgid.raw, ha->addr + 4, sizeof mgid);
849 mcast = __ipoib_mcast_find(dev, &mgid);
850 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
851 struct ipoib_mcast *nmcast;
853 /* ignore group which is directly joined by userspace */
854 if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) &&
855 !ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) {
856 ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid %pI6\n",
861 /* Not found or send-only group, let's add a new entry */
862 ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n",
865 nmcast = ipoib_mcast_alloc(dev, 0);
867 ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
871 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags);
873 nmcast->mcmember.mgid = mgid;
876 /* Destroy the send only entry */
877 list_move_tail(&mcast->list, &remove_list);
879 rb_replace_node(&mcast->rb_node,
881 &priv->multicast_tree);
883 __ipoib_mcast_add(dev, nmcast);
885 list_add_tail(&nmcast->list, &priv->multicast_list);
889 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
892 /* Remove all of the entries don't exist anymore */
893 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
894 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) &&
895 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
896 ipoib_dbg_mcast(priv, "deleting multicast group %pI6\n",
897 mcast->mcmember.mgid.raw);
899 rb_erase(&mcast->rb_node, &priv->multicast_tree);
901 /* Move to the remove list */
902 list_move_tail(&mcast->list, &remove_list);
906 spin_unlock(&priv->lock);
907 netif_addr_unlock(dev);
908 local_irq_restore(flags);
911 * make sure the in-flight joins have finished before we attempt
914 list_for_each_entry_safe(mcast, tmcast, &remove_list, list)
915 if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
916 wait_for_completion(&mcast->done);
918 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
919 ipoib_mcast_leave(mcast->dev, mcast);
920 ipoib_mcast_free(mcast);
924 * Double check that we are still up
926 if (test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
927 spin_lock_irqsave(&priv->lock, flags);
928 __ipoib_mcast_schedule_join_thread(priv, NULL, 0);
929 spin_unlock_irqrestore(&priv->lock, flags);
933 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
935 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
937 struct ipoib_mcast_iter *iter;
939 iter = kmalloc(sizeof *iter, GFP_KERNEL);
944 memset(iter->mgid.raw, 0, 16);
946 if (ipoib_mcast_iter_next(iter)) {
954 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
956 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
958 struct ipoib_mcast *mcast;
961 spin_lock_irq(&priv->lock);
963 n = rb_first(&priv->multicast_tree);
966 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
968 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw,
969 sizeof (union ib_gid)) < 0) {
970 iter->mgid = mcast->mcmember.mgid;
971 iter->created = mcast->created;
972 iter->queuelen = skb_queue_len(&mcast->pkt_queue);
973 iter->complete = !!mcast->ah;
974 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY));
984 spin_unlock_irq(&priv->lock);
989 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
991 unsigned long *created,
992 unsigned int *queuelen,
993 unsigned int *complete,
994 unsigned int *send_only)
997 *created = iter->created;
998 *queuelen = iter->queuelen;
999 *complete = iter->complete;
1000 *send_only = iter->send_only;
1003 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */