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 ipoib_neigh_free(dev
, neigh
);
120 spin_unlock_irqrestore(&priv
->lock
, flags
);
123 ipoib_put_ah(mcast
->ah
);
125 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
127 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
130 spin_lock_irqsave(&priv
->tx_lock
, flags
);
131 priv
->stats
.tx_dropped
+= tx_dropped
;
132 spin_unlock_irqrestore(&priv
->tx_lock
, flags
);
137 static struct ipoib_mcast
*ipoib_mcast_alloc(struct net_device
*dev
,
140 struct ipoib_mcast
*mcast
;
142 mcast
= kzalloc(sizeof *mcast
, can_sleep
? GFP_KERNEL
: GFP_ATOMIC
);
147 mcast
->created
= jiffies
;
150 INIT_LIST_HEAD(&mcast
->list
);
151 INIT_LIST_HEAD(&mcast
->neigh_list
);
152 skb_queue_head_init(&mcast
->pkt_queue
);
157 static struct ipoib_mcast
*__ipoib_mcast_find(struct net_device
*dev
, void *mgid
)
159 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
160 struct rb_node
*n
= priv
->multicast_tree
.rb_node
;
163 struct ipoib_mcast
*mcast
;
166 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
168 ret
= memcmp(mgid
, mcast
->mcmember
.mgid
.raw
,
169 sizeof (union ib_gid
));
181 static int __ipoib_mcast_add(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
183 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
184 struct rb_node
**n
= &priv
->multicast_tree
.rb_node
, *pn
= NULL
;
187 struct ipoib_mcast
*tmcast
;
191 tmcast
= rb_entry(pn
, struct ipoib_mcast
, rb_node
);
193 ret
= memcmp(mcast
->mcmember
.mgid
.raw
, tmcast
->mcmember
.mgid
.raw
,
194 sizeof (union ib_gid
));
203 rb_link_node(&mcast
->rb_node
, pn
, n
);
204 rb_insert_color(&mcast
->rb_node
, &priv
->multicast_tree
);
209 static int ipoib_mcast_join_finish(struct ipoib_mcast
*mcast
,
210 struct ib_sa_mcmember_rec
*mcmember
)
212 struct net_device
*dev
= mcast
->dev
;
213 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
217 mcast
->mcmember
= *mcmember
;
219 /* Set the cached Q_Key before we attach if it's the broadcast group */
220 if (!memcmp(mcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
221 sizeof (union ib_gid
))) {
222 priv
->qkey
= be32_to_cpu(priv
->broadcast
->mcmember
.qkey
);
223 priv
->tx_wr
.wr
.ud
.remote_qkey
= priv
->qkey
;
226 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
227 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
228 ipoib_warn(priv
, "multicast group " IPOIB_GID_FMT
229 " already attached\n",
230 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
235 ret
= ipoib_mcast_attach(dev
, be16_to_cpu(mcast
->mcmember
.mlid
),
236 &mcast
->mcmember
.mgid
);
238 ipoib_warn(priv
, "couldn't attach QP to multicast group "
240 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
242 clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
);
248 struct ib_ah_attr av
= {
249 .dlid
= be16_to_cpu(mcast
->mcmember
.mlid
),
250 .port_num
= priv
->port
,
251 .sl
= mcast
->mcmember
.sl
,
252 .ah_flags
= IB_AH_GRH
,
253 .static_rate
= mcast
->mcmember
.rate
,
255 .flow_label
= be32_to_cpu(mcast
->mcmember
.flow_label
),
256 .hop_limit
= mcast
->mcmember
.hop_limit
,
258 .traffic_class
= mcast
->mcmember
.traffic_class
261 av
.grh
.dgid
= mcast
->mcmember
.mgid
;
263 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
265 ipoib_warn(priv
, "ib_address_create failed\n");
267 spin_lock_irq(&priv
->lock
);
269 spin_unlock_irq(&priv
->lock
);
271 ipoib_dbg_mcast(priv
, "MGID " IPOIB_GID_FMT
272 " AV %p, LID 0x%04x, SL %d\n",
273 IPOIB_GID_ARG(mcast
->mcmember
.mgid
),
275 be16_to_cpu(mcast
->mcmember
.mlid
),
280 /* actually send any queued packets */
281 spin_lock_irq(&priv
->tx_lock
);
282 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
283 struct sk_buff
*skb
= skb_dequeue(&mcast
->pkt_queue
);
284 spin_unlock_irq(&priv
->tx_lock
);
288 if (!skb
->dst
|| !skb
->dst
->neighbour
) {
289 /* put pseudoheader back on for next time */
290 skb_push(skb
, sizeof (struct ipoib_pseudoheader
));
293 if (dev_queue_xmit(skb
))
294 ipoib_warn(priv
, "dev_queue_xmit failed to requeue packet\n");
295 spin_lock_irq(&priv
->tx_lock
);
297 spin_unlock_irq(&priv
->tx_lock
);
303 ipoib_mcast_sendonly_join_complete(int status
,
304 struct ib_sa_mcmember_rec
*mcmember
,
307 struct ipoib_mcast
*mcast
= mcast_ptr
;
308 struct net_device
*dev
= mcast
->dev
;
309 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
312 ipoib_mcast_join_finish(mcast
, mcmember
);
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
);
319 /* Flush out any queued packets */
320 spin_lock_irq(&priv
->tx_lock
);
321 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
322 ++priv
->stats
.tx_dropped
;
323 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
325 spin_unlock_irq(&priv
->tx_lock
);
327 /* Clear the busy flag so we try again */
328 clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
332 complete(&mcast
->done
);
335 static int ipoib_mcast_sendonly_join(struct ipoib_mcast
*mcast
)
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 */
348 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
349 ipoib_dbg_mcast(priv
, "device shutting down, no multicast joins\n");
353 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
)) {
354 ipoib_dbg_mcast(priv
, "multicast entry busy, skipping\n");
358 rec
.mgid
= mcast
->mcmember
.mgid
;
359 rec
.port_gid
= priv
->local_gid
;
360 rec
.pkey
= cpu_to_be16(priv
->pkey
);
362 init_completion(&mcast
->done
);
364 ret
= ib_sa_mcmember_rec_set(&ipoib_sa_client
, priv
->ca
, priv
->port
, &rec
,
365 IB_SA_MCMEMBER_REC_MGID
|
366 IB_SA_MCMEMBER_REC_PORT_GID
|
367 IB_SA_MCMEMBER_REC_PKEY
|
368 IB_SA_MCMEMBER_REC_JOIN_STATE
,
370 ipoib_mcast_sendonly_join_complete
,
371 mcast
, &mcast
->query
);
373 ipoib_warn(priv
, "ib_sa_mcmember_rec_set failed (ret = %d)\n",
376 ipoib_dbg_mcast(priv
, "no multicast record for " IPOIB_GID_FMT
378 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
380 mcast
->query_id
= ret
;
386 static void ipoib_mcast_join_complete(int status
,
387 struct ib_sa_mcmember_rec
*mcmember
,
390 struct ipoib_mcast
*mcast
= mcast_ptr
;
391 struct net_device
*dev
= mcast
->dev
;
392 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
394 ipoib_dbg_mcast(priv
, "join completion for " IPOIB_GID_FMT
396 IPOIB_GID_ARG(mcast
->mcmember
.mgid
), status
);
398 if (!status
&& !ipoib_mcast_join_finish(mcast
, mcmember
)) {
400 mutex_lock(&mcast_mutex
);
401 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
402 queue_delayed_work(ipoib_workqueue
,
403 &priv
->mcast_task
, 0);
404 mutex_unlock(&mcast_mutex
);
405 complete(&mcast
->done
);
409 if (status
== -EINTR
) {
410 complete(&mcast
->done
);
414 if (status
&& mcast
->logcount
++ < 20) {
415 if (status
== -ETIMEDOUT
|| status
== -EINTR
) {
416 ipoib_dbg_mcast(priv
, "multicast join failed for " IPOIB_GID_FMT
418 IPOIB_GID_ARG(mcast
->mcmember
.mgid
),
421 ipoib_warn(priv
, "multicast join failed for "
422 IPOIB_GID_FMT
", status %d\n",
423 IPOIB_GID_ARG(mcast
->mcmember
.mgid
),
429 if (mcast
->backoff
> IPOIB_MAX_BACKOFF_SECONDS
)
430 mcast
->backoff
= IPOIB_MAX_BACKOFF_SECONDS
;
432 mutex_lock(&mcast_mutex
);
434 spin_lock_irq(&priv
->lock
);
437 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
)) {
438 if (status
== -ETIMEDOUT
)
439 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
,
442 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
,
443 mcast
->backoff
* HZ
);
445 complete(&mcast
->done
);
446 spin_unlock_irq(&priv
->lock
);
447 mutex_unlock(&mcast_mutex
);
452 static void ipoib_mcast_join(struct net_device
*dev
, struct ipoib_mcast
*mcast
,
455 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
456 struct ib_sa_mcmember_rec rec
= {
459 ib_sa_comp_mask comp_mask
;
462 ipoib_dbg_mcast(priv
, "joining MGID " IPOIB_GID_FMT
"\n",
463 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
465 rec
.mgid
= mcast
->mcmember
.mgid
;
466 rec
.port_gid
= priv
->local_gid
;
467 rec
.pkey
= cpu_to_be16(priv
->pkey
);
470 IB_SA_MCMEMBER_REC_MGID
|
471 IB_SA_MCMEMBER_REC_PORT_GID
|
472 IB_SA_MCMEMBER_REC_PKEY
|
473 IB_SA_MCMEMBER_REC_JOIN_STATE
;
477 IB_SA_MCMEMBER_REC_QKEY
|
478 IB_SA_MCMEMBER_REC_MTU_SELECTOR
|
479 IB_SA_MCMEMBER_REC_MTU
|
480 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
|
481 IB_SA_MCMEMBER_REC_RATE_SELECTOR
|
482 IB_SA_MCMEMBER_REC_RATE
|
483 IB_SA_MCMEMBER_REC_SL
|
484 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
485 IB_SA_MCMEMBER_REC_HOP_LIMIT
;
487 rec
.qkey
= priv
->broadcast
->mcmember
.qkey
;
488 rec
.mtu_selector
= IB_SA_EQ
;
489 rec
.mtu
= priv
->broadcast
->mcmember
.mtu
;
490 rec
.traffic_class
= priv
->broadcast
->mcmember
.traffic_class
;
491 rec
.rate_selector
= IB_SA_EQ
;
492 rec
.rate
= priv
->broadcast
->mcmember
.rate
;
493 rec
.sl
= priv
->broadcast
->mcmember
.sl
;
494 rec
.flow_label
= priv
->broadcast
->mcmember
.flow_label
;
495 rec
.hop_limit
= priv
->broadcast
->mcmember
.hop_limit
;
498 init_completion(&mcast
->done
);
500 ret
= ib_sa_mcmember_rec_set(&ipoib_sa_client
, priv
->ca
, priv
->port
,
501 &rec
, comp_mask
, mcast
->backoff
* 1000,
502 GFP_ATOMIC
, ipoib_mcast_join_complete
,
503 mcast
, &mcast
->query
);
506 ipoib_warn(priv
, "ib_sa_mcmember_rec_set failed, status %d\n", ret
);
509 if (mcast
->backoff
> IPOIB_MAX_BACKOFF_SECONDS
)
510 mcast
->backoff
= IPOIB_MAX_BACKOFF_SECONDS
;
512 mutex_lock(&mcast_mutex
);
513 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
514 queue_delayed_work(ipoib_workqueue
,
516 mcast
->backoff
* HZ
);
517 mutex_unlock(&mcast_mutex
);
519 mcast
->query_id
= ret
;
522 void ipoib_mcast_join_task(struct work_struct
*work
)
524 struct ipoib_dev_priv
*priv
=
525 container_of(work
, struct ipoib_dev_priv
, mcast_task
.work
);
526 struct net_device
*dev
= priv
->dev
;
528 if (!test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
531 if (ib_query_gid(priv
->ca
, priv
->port
, 0, &priv
->local_gid
))
532 ipoib_warn(priv
, "ib_gid_entry_get() failed\n");
534 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
537 struct ib_port_attr attr
;
539 if (!ib_query_port(priv
->ca
, priv
->port
, &attr
)) {
540 priv
->local_lid
= attr
.lid
;
541 priv
->local_rate
= attr
.active_speed
*
542 ib_width_enum_to_int(attr
.active_width
);
544 ipoib_warn(priv
, "ib_query_port failed\n");
547 if (!priv
->broadcast
) {
548 struct ipoib_mcast
*broadcast
;
550 broadcast
= ipoib_mcast_alloc(dev
, 1);
552 ipoib_warn(priv
, "failed to allocate broadcast group\n");
553 mutex_lock(&mcast_mutex
);
554 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
555 queue_delayed_work(ipoib_workqueue
,
556 &priv
->mcast_task
, HZ
);
557 mutex_unlock(&mcast_mutex
);
561 spin_lock_irq(&priv
->lock
);
562 memcpy(broadcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
563 sizeof (union ib_gid
));
564 priv
->broadcast
= broadcast
;
566 __ipoib_mcast_add(dev
, priv
->broadcast
);
567 spin_unlock_irq(&priv
->lock
);
570 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
571 ipoib_mcast_join(dev
, priv
->broadcast
, 0);
576 struct ipoib_mcast
*mcast
= NULL
;
578 spin_lock_irq(&priv
->lock
);
579 list_for_each_entry(mcast
, &priv
->multicast_list
, list
) {
580 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)
581 && !test_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
)
582 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
583 /* Found the next unjoined group */
587 spin_unlock_irq(&priv
->lock
);
589 if (&mcast
->list
== &priv
->multicast_list
) {
594 ipoib_mcast_join(dev
, mcast
, 1);
598 priv
->mcast_mtu
= ib_mtu_enum_to_int(priv
->broadcast
->mcmember
.mtu
) -
600 dev
->mtu
= min(priv
->mcast_mtu
, priv
->admin_mtu
);
602 ipoib_dbg_mcast(priv
, "successfully joined all multicast groups\n");
604 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
605 netif_carrier_on(dev
);
608 int ipoib_mcast_start_thread(struct net_device
*dev
)
610 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
612 ipoib_dbg_mcast(priv
, "starting multicast thread\n");
614 mutex_lock(&mcast_mutex
);
615 if (!test_and_set_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
616 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
, 0);
617 mutex_unlock(&mcast_mutex
);
619 spin_lock_irq(&priv
->lock
);
620 set_bit(IPOIB_MCAST_STARTED
, &priv
->flags
);
621 spin_unlock_irq(&priv
->lock
);
626 static void wait_for_mcast_join(struct ipoib_dev_priv
*priv
,
627 struct ipoib_mcast
*mcast
)
629 spin_lock_irq(&priv
->lock
);
630 if (mcast
&& mcast
->query
) {
631 ib_sa_cancel_query(mcast
->query_id
, mcast
->query
);
633 spin_unlock_irq(&priv
->lock
);
634 ipoib_dbg_mcast(priv
, "waiting for MGID " IPOIB_GID_FMT
"\n",
635 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
636 wait_for_completion(&mcast
->done
);
639 spin_unlock_irq(&priv
->lock
);
642 int ipoib_mcast_stop_thread(struct net_device
*dev
, int flush
)
644 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
645 struct ipoib_mcast
*mcast
;
647 ipoib_dbg_mcast(priv
, "stopping multicast thread\n");
649 spin_lock_irq(&priv
->lock
);
650 clear_bit(IPOIB_MCAST_STARTED
, &priv
->flags
);
651 spin_unlock_irq(&priv
->lock
);
653 mutex_lock(&mcast_mutex
);
654 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
655 cancel_delayed_work(&priv
->mcast_task
);
656 mutex_unlock(&mcast_mutex
);
659 flush_workqueue(ipoib_workqueue
);
661 wait_for_mcast_join(priv
, priv
->broadcast
);
663 list_for_each_entry(mcast
, &priv
->multicast_list
, list
)
664 wait_for_mcast_join(priv
, mcast
);
669 static int ipoib_mcast_leave(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
671 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
672 struct ib_sa_mcmember_rec rec
= {
677 if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
))
680 ipoib_dbg_mcast(priv
, "leaving MGID " IPOIB_GID_FMT
"\n",
681 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
683 rec
.mgid
= mcast
->mcmember
.mgid
;
684 rec
.port_gid
= priv
->local_gid
;
685 rec
.pkey
= cpu_to_be16(priv
->pkey
);
687 /* Remove ourselves from the multicast group */
688 ret
= ipoib_mcast_detach(dev
, be16_to_cpu(mcast
->mcmember
.mlid
),
689 &mcast
->mcmember
.mgid
);
691 ipoib_warn(priv
, "ipoib_mcast_detach failed (result = %d)\n", ret
);
694 * Just make one shot at leaving and don't wait for a reply;
695 * if we fail, too bad.
697 ret
= ib_sa_mcmember_rec_delete(&ipoib_sa_client
, priv
->ca
, priv
->port
, &rec
,
698 IB_SA_MCMEMBER_REC_MGID
|
699 IB_SA_MCMEMBER_REC_PORT_GID
|
700 IB_SA_MCMEMBER_REC_PKEY
|
701 IB_SA_MCMEMBER_REC_JOIN_STATE
,
703 mcast
, &mcast
->query
);
705 ipoib_warn(priv
, "ib_sa_mcmember_rec_delete failed "
706 "for leave (result = %d)\n", ret
);
711 void ipoib_mcast_send(struct net_device
*dev
, void *mgid
, struct sk_buff
*skb
)
713 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
714 struct ipoib_mcast
*mcast
;
717 * We can only be called from ipoib_start_xmit, so we're
718 * inside tx_lock -- no need to save/restore flags.
720 spin_lock(&priv
->lock
);
722 if (!test_bit(IPOIB_MCAST_STARTED
, &priv
->flags
) ||
724 !test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
725 ++priv
->stats
.tx_dropped
;
726 dev_kfree_skb_any(skb
);
730 mcast
= __ipoib_mcast_find(dev
, mgid
);
732 /* Let's create a new send only group now */
733 ipoib_dbg_mcast(priv
, "setting up send only multicast group for "
734 IPOIB_GID_FMT
"\n", IPOIB_GID_RAW_ARG(mgid
));
736 mcast
= ipoib_mcast_alloc(dev
, 0);
738 ipoib_warn(priv
, "unable to allocate memory for "
739 "multicast structure\n");
740 ++priv
->stats
.tx_dropped
;
741 dev_kfree_skb_any(skb
);
745 set_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
);
746 memcpy(mcast
->mcmember
.mgid
.raw
, mgid
, sizeof (union ib_gid
));
747 __ipoib_mcast_add(dev
, mcast
);
748 list_add_tail(&mcast
->list
, &priv
->multicast_list
);
752 if (skb_queue_len(&mcast
->pkt_queue
) < IPOIB_MAX_MCAST_QUEUE
)
753 skb_queue_tail(&mcast
->pkt_queue
, skb
);
755 ++priv
->stats
.tx_dropped
;
756 dev_kfree_skb_any(skb
);
760 ipoib_dbg_mcast(priv
, "no address vector, "
761 "but multicast join already started\n");
762 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
))
763 ipoib_mcast_sendonly_join(mcast
);
766 * If lookup completes between here and out:, don't
767 * want to send packet twice.
773 if (mcast
&& mcast
->ah
) {
775 skb
->dst
->neighbour
&&
776 !*to_ipoib_neigh(skb
->dst
->neighbour
)) {
777 struct ipoib_neigh
*neigh
= ipoib_neigh_alloc(skb
->dst
->neighbour
);
780 kref_get(&mcast
->ah
->ref
);
781 neigh
->ah
= mcast
->ah
;
782 list_add_tail(&neigh
->list
, &mcast
->neigh_list
);
786 ipoib_send(dev
, skb
, mcast
->ah
, IB_MULTICAST_QPN
);
790 spin_unlock(&priv
->lock
);
793 void ipoib_mcast_dev_flush(struct net_device
*dev
)
795 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
796 LIST_HEAD(remove_list
);
797 struct ipoib_mcast
*mcast
, *tmcast
;
800 ipoib_dbg_mcast(priv
, "flushing multicast list\n");
802 spin_lock_irqsave(&priv
->lock
, flags
);
804 list_for_each_entry_safe(mcast
, tmcast
, &priv
->multicast_list
, list
) {
805 list_del(&mcast
->list
);
806 rb_erase(&mcast
->rb_node
, &priv
->multicast_tree
);
807 list_add_tail(&mcast
->list
, &remove_list
);
810 if (priv
->broadcast
) {
811 rb_erase(&priv
->broadcast
->rb_node
, &priv
->multicast_tree
);
812 list_add_tail(&priv
->broadcast
->list
, &remove_list
);
813 priv
->broadcast
= NULL
;
816 spin_unlock_irqrestore(&priv
->lock
, flags
);
818 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
819 ipoib_mcast_leave(dev
, mcast
);
820 ipoib_mcast_free(mcast
);
824 void ipoib_mcast_restart_task(struct work_struct
*work
)
826 struct ipoib_dev_priv
*priv
=
827 container_of(work
, struct ipoib_dev_priv
, restart_task
);
828 struct net_device
*dev
= 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 local_irq_save(flags
);
840 spin_lock(&priv
->lock
);
843 * Unfortunately, the networking core only gives us a list of all of
844 * the multicast hardware addresses. We need to figure out which ones
845 * are new and which ones have been removed
848 /* Clear out the found flag */
849 list_for_each_entry(mcast
, &priv
->multicast_list
, list
)
850 clear_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
);
852 /* Mark all of the entries that are found or don't exist */
853 for (mclist
= dev
->mc_list
; mclist
; mclist
= mclist
->next
) {
856 memcpy(mgid
.raw
, mclist
->dmi_addr
+ 4, sizeof mgid
);
858 /* Add in the P_Key */
859 mgid
.raw
[4] = (priv
->pkey
>> 8) & 0xff;
860 mgid
.raw
[5] = priv
->pkey
& 0xff;
862 mcast
= __ipoib_mcast_find(dev
, &mgid
);
863 if (!mcast
|| test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
864 struct ipoib_mcast
*nmcast
;
866 /* Not found or send-only group, let's add a new entry */
867 ipoib_dbg_mcast(priv
, "adding multicast entry for mgid "
868 IPOIB_GID_FMT
"\n", IPOIB_GID_ARG(mgid
));
870 nmcast
= ipoib_mcast_alloc(dev
, 0);
872 ipoib_warn(priv
, "unable to allocate memory for multicast structure\n");
876 set_bit(IPOIB_MCAST_FLAG_FOUND
, &nmcast
->flags
);
878 nmcast
->mcmember
.mgid
= mgid
;
881 /* Destroy the send only entry */
882 list_move_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_move_tail(&mcast
->list
, &remove_list
);
911 spin_unlock(&priv
->lock
);
912 netif_tx_unlock(dev
);
913 local_irq_restore(flags
);
915 /* We have to cancel outside of the spinlock */
916 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
917 wait_for_mcast_join(priv
, mcast
);
918 ipoib_mcast_leave(mcast
->dev
, mcast
);
919 ipoib_mcast_free(mcast
);
922 if (test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
923 ipoib_mcast_start_thread(dev
);
926 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
928 struct ipoib_mcast_iter
*ipoib_mcast_iter_init(struct net_device
*dev
)
930 struct ipoib_mcast_iter
*iter
;
932 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
937 memset(iter
->mgid
.raw
, 0, 16);
939 if (ipoib_mcast_iter_next(iter
)) {
947 int ipoib_mcast_iter_next(struct ipoib_mcast_iter
*iter
)
949 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
951 struct ipoib_mcast
*mcast
;
954 spin_lock_irq(&priv
->lock
);
956 n
= rb_first(&priv
->multicast_tree
);
959 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
961 if (memcmp(iter
->mgid
.raw
, mcast
->mcmember
.mgid
.raw
,
962 sizeof (union ib_gid
)) < 0) {
963 iter
->mgid
= mcast
->mcmember
.mgid
;
964 iter
->created
= mcast
->created
;
965 iter
->queuelen
= skb_queue_len(&mcast
->pkt_queue
);
966 iter
->complete
= !!mcast
->ah
;
967 iter
->send_only
= !!(mcast
->flags
& (1 << IPOIB_MCAST_FLAG_SENDONLY
));
977 spin_unlock_irq(&priv
->lock
);
982 void ipoib_mcast_iter_read(struct ipoib_mcast_iter
*iter
,
984 unsigned long *created
,
985 unsigned int *queuelen
,
986 unsigned int *complete
,
987 unsigned int *send_only
)
990 *created
= iter
->created
;
991 *queuelen
= iter
->queuelen
;
992 *complete
= iter
->complete
;
993 *send_only
= iter
->send_only
;
996 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */