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 struct ipoib_mcast_iter
{
61 struct net_device
*dev
;
63 unsigned long created
;
64 unsigned int queuelen
;
65 unsigned int complete
;
66 unsigned int send_only
;
69 static void ipoib_mcast_free(struct ipoib_mcast
*mcast
)
71 struct net_device
*dev
= mcast
->dev
;
72 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
73 struct ipoib_neigh
*neigh
, *tmp
;
77 ipoib_dbg_mcast(netdev_priv(dev
),
78 "deleting multicast group " IPOIB_GID_FMT
"\n",
79 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
81 spin_lock_irqsave(&priv
->lock
, flags
);
83 list_for_each_entry_safe(neigh
, tmp
, &mcast
->neigh_list
, list
) {
85 * It's safe to call ipoib_put_ah() inside priv->lock
86 * here, because we know that mcast->ah will always
87 * hold one more reference, so ipoib_put_ah() will
88 * never do more than decrement the ref count.
91 ipoib_put_ah(neigh
->ah
);
92 ipoib_neigh_free(dev
, neigh
);
95 spin_unlock_irqrestore(&priv
->lock
, flags
);
98 ipoib_put_ah(mcast
->ah
);
100 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
102 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
105 spin_lock_irqsave(&priv
->tx_lock
, flags
);
106 dev
->stats
.tx_dropped
+= tx_dropped
;
107 spin_unlock_irqrestore(&priv
->tx_lock
, flags
);
112 static struct ipoib_mcast
*ipoib_mcast_alloc(struct net_device
*dev
,
115 struct ipoib_mcast
*mcast
;
117 mcast
= kzalloc(sizeof *mcast
, can_sleep
? GFP_KERNEL
: GFP_ATOMIC
);
122 mcast
->created
= jiffies
;
125 INIT_LIST_HEAD(&mcast
->list
);
126 INIT_LIST_HEAD(&mcast
->neigh_list
);
127 skb_queue_head_init(&mcast
->pkt_queue
);
132 static struct ipoib_mcast
*__ipoib_mcast_find(struct net_device
*dev
, void *mgid
)
134 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
135 struct rb_node
*n
= priv
->multicast_tree
.rb_node
;
138 struct ipoib_mcast
*mcast
;
141 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
143 ret
= memcmp(mgid
, mcast
->mcmember
.mgid
.raw
,
144 sizeof (union ib_gid
));
156 static int __ipoib_mcast_add(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
158 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
159 struct rb_node
**n
= &priv
->multicast_tree
.rb_node
, *pn
= NULL
;
162 struct ipoib_mcast
*tmcast
;
166 tmcast
= rb_entry(pn
, struct ipoib_mcast
, rb_node
);
168 ret
= memcmp(mcast
->mcmember
.mgid
.raw
, tmcast
->mcmember
.mgid
.raw
,
169 sizeof (union ib_gid
));
178 rb_link_node(&mcast
->rb_node
, pn
, n
);
179 rb_insert_color(&mcast
->rb_node
, &priv
->multicast_tree
);
184 static int ipoib_mcast_join_finish(struct ipoib_mcast
*mcast
,
185 struct ib_sa_mcmember_rec
*mcmember
)
187 struct net_device
*dev
= mcast
->dev
;
188 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
192 mcast
->mcmember
= *mcmember
;
194 /* Set the cached Q_Key before we attach if it's the broadcast group */
195 if (!memcmp(mcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
196 sizeof (union ib_gid
))) {
197 spin_lock_irq(&priv
->lock
);
198 if (!priv
->broadcast
) {
199 spin_unlock_irq(&priv
->lock
);
202 priv
->qkey
= be32_to_cpu(priv
->broadcast
->mcmember
.qkey
);
203 spin_unlock_irq(&priv
->lock
);
204 priv
->tx_wr
.wr
.ud
.remote_qkey
= priv
->qkey
;
207 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
208 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
209 ipoib_warn(priv
, "multicast group " IPOIB_GID_FMT
210 " already attached\n",
211 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
216 ret
= ipoib_mcast_attach(dev
, be16_to_cpu(mcast
->mcmember
.mlid
),
217 &mcast
->mcmember
.mgid
);
219 ipoib_warn(priv
, "couldn't attach QP to multicast group "
221 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
223 clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
);
229 struct ib_ah_attr av
= {
230 .dlid
= be16_to_cpu(mcast
->mcmember
.mlid
),
231 .port_num
= priv
->port
,
232 .sl
= mcast
->mcmember
.sl
,
233 .ah_flags
= IB_AH_GRH
,
234 .static_rate
= mcast
->mcmember
.rate
,
236 .flow_label
= be32_to_cpu(mcast
->mcmember
.flow_label
),
237 .hop_limit
= mcast
->mcmember
.hop_limit
,
239 .traffic_class
= mcast
->mcmember
.traffic_class
242 av
.grh
.dgid
= mcast
->mcmember
.mgid
;
244 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
246 ipoib_warn(priv
, "ib_address_create failed\n");
248 spin_lock_irq(&priv
->lock
);
250 spin_unlock_irq(&priv
->lock
);
252 ipoib_dbg_mcast(priv
, "MGID " IPOIB_GID_FMT
253 " AV %p, LID 0x%04x, SL %d\n",
254 IPOIB_GID_ARG(mcast
->mcmember
.mgid
),
256 be16_to_cpu(mcast
->mcmember
.mlid
),
261 /* actually send any queued packets */
262 spin_lock_irq(&priv
->tx_lock
);
263 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
264 struct sk_buff
*skb
= skb_dequeue(&mcast
->pkt_queue
);
265 spin_unlock_irq(&priv
->tx_lock
);
269 if (!skb
->dst
|| !skb
->dst
->neighbour
) {
270 /* put pseudoheader back on for next time */
271 skb_push(skb
, sizeof (struct ipoib_pseudoheader
));
274 if (dev_queue_xmit(skb
))
275 ipoib_warn(priv
, "dev_queue_xmit failed to requeue packet\n");
276 spin_lock_irq(&priv
->tx_lock
);
278 spin_unlock_irq(&priv
->tx_lock
);
284 ipoib_mcast_sendonly_join_complete(int status
,
285 struct ib_sa_multicast
*multicast
)
287 struct ipoib_mcast
*mcast
= multicast
->context
;
288 struct net_device
*dev
= mcast
->dev
;
289 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
291 /* We trap for port events ourselves. */
292 if (status
== -ENETRESET
)
296 status
= ipoib_mcast_join_finish(mcast
, &multicast
->rec
);
299 if (mcast
->logcount
++ < 20)
300 ipoib_dbg_mcast(netdev_priv(dev
), "multicast join failed for "
301 IPOIB_GID_FMT
", status %d\n",
302 IPOIB_GID_ARG(mcast
->mcmember
.mgid
), status
);
304 /* Flush out any queued packets */
305 spin_lock_irq(&priv
->tx_lock
);
306 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
307 ++dev
->stats
.tx_dropped
;
308 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
310 spin_unlock_irq(&priv
->tx_lock
);
312 /* Clear the busy flag so we try again */
313 status
= test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
,
319 static int ipoib_mcast_sendonly_join(struct ipoib_mcast
*mcast
)
321 struct net_device
*dev
= mcast
->dev
;
322 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
323 struct ib_sa_mcmember_rec rec
= {
324 #if 0 /* Some SMs don't support send-only yet */
332 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
333 ipoib_dbg_mcast(priv
, "device shutting down, no multicast joins\n");
337 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
)) {
338 ipoib_dbg_mcast(priv
, "multicast entry busy, skipping\n");
342 rec
.mgid
= mcast
->mcmember
.mgid
;
343 rec
.port_gid
= priv
->local_gid
;
344 rec
.pkey
= cpu_to_be16(priv
->pkey
);
346 mcast
->mc
= ib_sa_join_multicast(&ipoib_sa_client
, priv
->ca
,
348 IB_SA_MCMEMBER_REC_MGID
|
349 IB_SA_MCMEMBER_REC_PORT_GID
|
350 IB_SA_MCMEMBER_REC_PKEY
|
351 IB_SA_MCMEMBER_REC_JOIN_STATE
,
353 ipoib_mcast_sendonly_join_complete
,
355 if (IS_ERR(mcast
->mc
)) {
356 ret
= PTR_ERR(mcast
->mc
);
357 clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
358 ipoib_warn(priv
, "ib_sa_join_multicast failed (ret = %d)\n",
361 ipoib_dbg_mcast(priv
, "no multicast record for " IPOIB_GID_FMT
363 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
369 static int ipoib_mcast_join_complete(int status
,
370 struct ib_sa_multicast
*multicast
)
372 struct ipoib_mcast
*mcast
= multicast
->context
;
373 struct net_device
*dev
= mcast
->dev
;
374 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
376 ipoib_dbg_mcast(priv
, "join completion for " IPOIB_GID_FMT
378 IPOIB_GID_ARG(mcast
->mcmember
.mgid
), status
);
380 /* We trap for port events ourselves. */
381 if (status
== -ENETRESET
)
385 status
= ipoib_mcast_join_finish(mcast
, &multicast
->rec
);
389 mutex_lock(&mcast_mutex
);
390 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
391 queue_delayed_work(ipoib_workqueue
,
392 &priv
->mcast_task
, 0);
393 mutex_unlock(&mcast_mutex
);
395 if (mcast
== priv
->broadcast
)
396 netif_carrier_on(dev
);
401 if (mcast
->logcount
++ < 20) {
402 if (status
== -ETIMEDOUT
) {
403 ipoib_dbg_mcast(priv
, "multicast join failed for " IPOIB_GID_FMT
405 IPOIB_GID_ARG(mcast
->mcmember
.mgid
),
408 ipoib_warn(priv
, "multicast join failed for "
409 IPOIB_GID_FMT
", status %d\n",
410 IPOIB_GID_ARG(mcast
->mcmember
.mgid
),
416 if (mcast
->backoff
> IPOIB_MAX_BACKOFF_SECONDS
)
417 mcast
->backoff
= IPOIB_MAX_BACKOFF_SECONDS
;
419 /* Clear the busy flag so we try again */
420 status
= test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
422 mutex_lock(&mcast_mutex
);
423 spin_lock_irq(&priv
->lock
);
424 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
425 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
,
426 mcast
->backoff
* HZ
);
427 spin_unlock_irq(&priv
->lock
);
428 mutex_unlock(&mcast_mutex
);
433 static void ipoib_mcast_join(struct net_device
*dev
, struct ipoib_mcast
*mcast
,
436 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
437 struct ib_sa_mcmember_rec rec
= {
440 ib_sa_comp_mask comp_mask
;
443 ipoib_dbg_mcast(priv
, "joining MGID " IPOIB_GID_FMT
"\n",
444 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
446 rec
.mgid
= mcast
->mcmember
.mgid
;
447 rec
.port_gid
= priv
->local_gid
;
448 rec
.pkey
= cpu_to_be16(priv
->pkey
);
451 IB_SA_MCMEMBER_REC_MGID
|
452 IB_SA_MCMEMBER_REC_PORT_GID
|
453 IB_SA_MCMEMBER_REC_PKEY
|
454 IB_SA_MCMEMBER_REC_JOIN_STATE
;
458 IB_SA_MCMEMBER_REC_QKEY
|
459 IB_SA_MCMEMBER_REC_MTU_SELECTOR
|
460 IB_SA_MCMEMBER_REC_MTU
|
461 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
|
462 IB_SA_MCMEMBER_REC_RATE_SELECTOR
|
463 IB_SA_MCMEMBER_REC_RATE
|
464 IB_SA_MCMEMBER_REC_SL
|
465 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
466 IB_SA_MCMEMBER_REC_HOP_LIMIT
;
468 rec
.qkey
= priv
->broadcast
->mcmember
.qkey
;
469 rec
.mtu_selector
= IB_SA_EQ
;
470 rec
.mtu
= priv
->broadcast
->mcmember
.mtu
;
471 rec
.traffic_class
= priv
->broadcast
->mcmember
.traffic_class
;
472 rec
.rate_selector
= IB_SA_EQ
;
473 rec
.rate
= priv
->broadcast
->mcmember
.rate
;
474 rec
.sl
= priv
->broadcast
->mcmember
.sl
;
475 rec
.flow_label
= priv
->broadcast
->mcmember
.flow_label
;
476 rec
.hop_limit
= priv
->broadcast
->mcmember
.hop_limit
;
479 set_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
480 mcast
->mc
= ib_sa_join_multicast(&ipoib_sa_client
, priv
->ca
, priv
->port
,
481 &rec
, comp_mask
, GFP_KERNEL
,
482 ipoib_mcast_join_complete
, mcast
);
483 if (IS_ERR(mcast
->mc
)) {
484 clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
485 ret
= PTR_ERR(mcast
->mc
);
486 ipoib_warn(priv
, "ib_sa_join_multicast failed, status %d\n", ret
);
489 if (mcast
->backoff
> IPOIB_MAX_BACKOFF_SECONDS
)
490 mcast
->backoff
= IPOIB_MAX_BACKOFF_SECONDS
;
492 mutex_lock(&mcast_mutex
);
493 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
494 queue_delayed_work(ipoib_workqueue
,
496 mcast
->backoff
* HZ
);
497 mutex_unlock(&mcast_mutex
);
501 void ipoib_mcast_join_task(struct work_struct
*work
)
503 struct ipoib_dev_priv
*priv
=
504 container_of(work
, struct ipoib_dev_priv
, mcast_task
.work
);
505 struct net_device
*dev
= priv
->dev
;
507 if (!test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
510 if (ib_query_gid(priv
->ca
, priv
->port
, 0, &priv
->local_gid
))
511 ipoib_warn(priv
, "ib_query_gid() failed\n");
513 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
516 struct ib_port_attr attr
;
518 if (!ib_query_port(priv
->ca
, priv
->port
, &attr
))
519 priv
->local_lid
= attr
.lid
;
521 ipoib_warn(priv
, "ib_query_port failed\n");
524 if (!priv
->broadcast
) {
525 struct ipoib_mcast
*broadcast
;
527 broadcast
= ipoib_mcast_alloc(dev
, 1);
529 ipoib_warn(priv
, "failed to allocate broadcast group\n");
530 mutex_lock(&mcast_mutex
);
531 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
532 queue_delayed_work(ipoib_workqueue
,
533 &priv
->mcast_task
, HZ
);
534 mutex_unlock(&mcast_mutex
);
538 spin_lock_irq(&priv
->lock
);
539 memcpy(broadcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
540 sizeof (union ib_gid
));
541 priv
->broadcast
= broadcast
;
543 __ipoib_mcast_add(dev
, priv
->broadcast
);
544 spin_unlock_irq(&priv
->lock
);
547 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
548 if (!test_bit(IPOIB_MCAST_FLAG_BUSY
, &priv
->broadcast
->flags
))
549 ipoib_mcast_join(dev
, priv
->broadcast
, 0);
554 struct ipoib_mcast
*mcast
= NULL
;
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 */
565 spin_unlock_irq(&priv
->lock
);
567 if (&mcast
->list
== &priv
->multicast_list
) {
572 ipoib_mcast_join(dev
, mcast
, 1);
576 priv
->mcast_mtu
= IPOIB_UD_MTU(ib_mtu_enum_to_int(priv
->broadcast
->mcmember
.mtu
));
578 if (!ipoib_cm_admin_enabled(dev
))
579 dev
->mtu
= min(priv
->mcast_mtu
, priv
->admin_mtu
);
581 ipoib_dbg_mcast(priv
, "successfully joined all multicast groups\n");
583 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
586 int ipoib_mcast_start_thread(struct net_device
*dev
)
588 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
590 ipoib_dbg_mcast(priv
, "starting multicast thread\n");
592 mutex_lock(&mcast_mutex
);
593 if (!test_and_set_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
594 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
, 0);
595 mutex_unlock(&mcast_mutex
);
597 spin_lock_irq(&priv
->lock
);
598 set_bit(IPOIB_MCAST_STARTED
, &priv
->flags
);
599 spin_unlock_irq(&priv
->lock
);
604 int ipoib_mcast_stop_thread(struct net_device
*dev
, int flush
)
606 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
608 ipoib_dbg_mcast(priv
, "stopping multicast thread\n");
610 spin_lock_irq(&priv
->lock
);
611 clear_bit(IPOIB_MCAST_STARTED
, &priv
->flags
);
612 spin_unlock_irq(&priv
->lock
);
614 mutex_lock(&mcast_mutex
);
615 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
616 cancel_delayed_work(&priv
->mcast_task
);
617 mutex_unlock(&mcast_mutex
);
620 flush_workqueue(ipoib_workqueue
);
625 static int ipoib_mcast_leave(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
627 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
630 if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
))
631 ib_sa_free_multicast(mcast
->mc
);
633 if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
634 ipoib_dbg_mcast(priv
, "leaving MGID " IPOIB_GID_FMT
"\n",
635 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
637 /* Remove ourselves from the multicast group */
638 ret
= ipoib_mcast_detach(dev
, be16_to_cpu(mcast
->mcmember
.mlid
),
639 &mcast
->mcmember
.mgid
);
641 ipoib_warn(priv
, "ipoib_mcast_detach failed (result = %d)\n", ret
);
647 void ipoib_mcast_send(struct net_device
*dev
, void *mgid
, struct sk_buff
*skb
)
649 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
650 struct ipoib_mcast
*mcast
;
653 * We can only be called from ipoib_start_xmit, so we're
654 * inside tx_lock -- no need to save/restore flags.
656 spin_lock(&priv
->lock
);
658 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
) ||
660 !test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
661 ++dev
->stats
.tx_dropped
;
662 dev_kfree_skb_any(skb
);
666 mcast
= __ipoib_mcast_find(dev
, mgid
);
668 /* Let's create a new send only group now */
669 ipoib_dbg_mcast(priv
, "setting up send only multicast group for "
670 IPOIB_GID_FMT
"\n", IPOIB_GID_RAW_ARG(mgid
));
672 mcast
= ipoib_mcast_alloc(dev
, 0);
674 ipoib_warn(priv
, "unable to allocate memory for "
675 "multicast structure\n");
676 ++dev
->stats
.tx_dropped
;
677 dev_kfree_skb_any(skb
);
681 set_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
);
682 memcpy(mcast
->mcmember
.mgid
.raw
, mgid
, sizeof (union ib_gid
));
683 __ipoib_mcast_add(dev
, mcast
);
684 list_add_tail(&mcast
->list
, &priv
->multicast_list
);
688 if (skb_queue_len(&mcast
->pkt_queue
) < IPOIB_MAX_MCAST_QUEUE
)
689 skb_queue_tail(&mcast
->pkt_queue
, skb
);
691 ++dev
->stats
.tx_dropped
;
692 dev_kfree_skb_any(skb
);
695 if (test_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
))
696 ipoib_dbg_mcast(priv
, "no address vector, "
697 "but multicast join already started\n");
698 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
))
699 ipoib_mcast_sendonly_join(mcast
);
702 * If lookup completes between here and out:, don't
703 * want to send packet twice.
709 if (mcast
&& mcast
->ah
) {
711 skb
->dst
->neighbour
&&
712 !*to_ipoib_neigh(skb
->dst
->neighbour
)) {
713 struct ipoib_neigh
*neigh
= ipoib_neigh_alloc(skb
->dst
->neighbour
,
717 kref_get(&mcast
->ah
->ref
);
718 neigh
->ah
= mcast
->ah
;
719 list_add_tail(&neigh
->list
, &mcast
->neigh_list
);
723 ipoib_send(dev
, skb
, mcast
->ah
, IB_MULTICAST_QPN
);
727 spin_unlock(&priv
->lock
);
730 void ipoib_mcast_dev_flush(struct net_device
*dev
)
732 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
733 LIST_HEAD(remove_list
);
734 struct ipoib_mcast
*mcast
, *tmcast
;
737 ipoib_dbg_mcast(priv
, "flushing multicast list\n");
739 spin_lock_irqsave(&priv
->lock
, flags
);
741 list_for_each_entry_safe(mcast
, tmcast
, &priv
->multicast_list
, list
) {
742 list_del(&mcast
->list
);
743 rb_erase(&mcast
->rb_node
, &priv
->multicast_tree
);
744 list_add_tail(&mcast
->list
, &remove_list
);
747 if (priv
->broadcast
) {
748 rb_erase(&priv
->broadcast
->rb_node
, &priv
->multicast_tree
);
749 list_add_tail(&priv
->broadcast
->list
, &remove_list
);
750 priv
->broadcast
= NULL
;
753 spin_unlock_irqrestore(&priv
->lock
, flags
);
755 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
756 ipoib_mcast_leave(dev
, mcast
);
757 ipoib_mcast_free(mcast
);
761 void ipoib_mcast_restart_task(struct work_struct
*work
)
763 struct ipoib_dev_priv
*priv
=
764 container_of(work
, struct ipoib_dev_priv
, restart_task
);
765 struct net_device
*dev
= priv
->dev
;
766 struct dev_mc_list
*mclist
;
767 struct ipoib_mcast
*mcast
, *tmcast
;
768 LIST_HEAD(remove_list
);
770 struct ib_sa_mcmember_rec rec
;
772 ipoib_dbg_mcast(priv
, "restarting multicast task\n");
774 ipoib_mcast_stop_thread(dev
, 0);
776 local_irq_save(flags
);
778 spin_lock(&priv
->lock
);
781 * Unfortunately, the networking core only gives us a list of all of
782 * the multicast hardware addresses. We need to figure out which ones
783 * are new and which ones have been removed
786 /* Clear out the found flag */
787 list_for_each_entry(mcast
, &priv
->multicast_list
, list
)
788 clear_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
);
790 /* Mark all of the entries that are found or don't exist */
791 for (mclist
= dev
->mc_list
; mclist
; mclist
= mclist
->next
) {
794 memcpy(mgid
.raw
, mclist
->dmi_addr
+ 4, sizeof mgid
);
796 mcast
= __ipoib_mcast_find(dev
, &mgid
);
797 if (!mcast
|| test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
798 struct ipoib_mcast
*nmcast
;
800 /* ignore group which is directly joined by userspace */
801 if (test_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
) &&
802 !ib_sa_get_mcmember_rec(priv
->ca
, priv
->port
, &mgid
, &rec
)) {
803 ipoib_dbg_mcast(priv
, "ignoring multicast entry for mgid "
804 IPOIB_GID_FMT
"\n", IPOIB_GID_ARG(mgid
));
808 /* Not found or send-only group, let's add a new entry */
809 ipoib_dbg_mcast(priv
, "adding multicast entry for mgid "
810 IPOIB_GID_FMT
"\n", IPOIB_GID_ARG(mgid
));
812 nmcast
= ipoib_mcast_alloc(dev
, 0);
814 ipoib_warn(priv
, "unable to allocate memory for multicast structure\n");
818 set_bit(IPOIB_MCAST_FLAG_FOUND
, &nmcast
->flags
);
820 nmcast
->mcmember
.mgid
= mgid
;
823 /* Destroy the send only entry */
824 list_move_tail(&mcast
->list
, &remove_list
);
826 rb_replace_node(&mcast
->rb_node
,
828 &priv
->multicast_tree
);
830 __ipoib_mcast_add(dev
, nmcast
);
832 list_add_tail(&nmcast
->list
, &priv
->multicast_list
);
836 set_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
);
839 /* Remove all of the entries don't exist anymore */
840 list_for_each_entry_safe(mcast
, tmcast
, &priv
->multicast_list
, list
) {
841 if (!test_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
) &&
842 !test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
843 ipoib_dbg_mcast(priv
, "deleting multicast group " IPOIB_GID_FMT
"\n",
844 IPOIB_GID_ARG(mcast
->mcmember
.mgid
));
846 rb_erase(&mcast
->rb_node
, &priv
->multicast_tree
);
848 /* Move to the remove list */
849 list_move_tail(&mcast
->list
, &remove_list
);
853 spin_unlock(&priv
->lock
);
854 netif_tx_unlock(dev
);
855 local_irq_restore(flags
);
857 /* We have to cancel outside of the spinlock */
858 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
859 ipoib_mcast_leave(mcast
->dev
, mcast
);
860 ipoib_mcast_free(mcast
);
863 if (test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
864 ipoib_mcast_start_thread(dev
);
867 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
869 struct ipoib_mcast_iter
*ipoib_mcast_iter_init(struct net_device
*dev
)
871 struct ipoib_mcast_iter
*iter
;
873 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
878 memset(iter
->mgid
.raw
, 0, 16);
880 if (ipoib_mcast_iter_next(iter
)) {
888 int ipoib_mcast_iter_next(struct ipoib_mcast_iter
*iter
)
890 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
892 struct ipoib_mcast
*mcast
;
895 spin_lock_irq(&priv
->lock
);
897 n
= rb_first(&priv
->multicast_tree
);
900 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
902 if (memcmp(iter
->mgid
.raw
, mcast
->mcmember
.mgid
.raw
,
903 sizeof (union ib_gid
)) < 0) {
904 iter
->mgid
= mcast
->mcmember
.mgid
;
905 iter
->created
= mcast
->created
;
906 iter
->queuelen
= skb_queue_len(&mcast
->pkt_queue
);
907 iter
->complete
= !!mcast
->ah
;
908 iter
->send_only
= !!(mcast
->flags
& (1 << IPOIB_MCAST_FLAG_SENDONLY
));
918 spin_unlock_irq(&priv
->lock
);
923 void ipoib_mcast_iter_read(struct ipoib_mcast_iter
*iter
,
925 unsigned long *created
,
926 unsigned int *queuelen
,
927 unsigned int *complete
,
928 unsigned int *send_only
)
931 *created
= iter
->created
;
932 *queuelen
= iter
->queuelen
;
933 *complete
= iter
->complete
;
934 *send_only
= iter
->send_only
;
937 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */