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>
39 #include <linux/igmp.h>
40 #include <linux/inetdevice.h>
41 #include <linux/delay.h>
42 #include <linux/completion.h>
43 #include <linux/slab.h>
49 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
50 static int mcast_debug_level
;
52 module_param(mcast_debug_level
, int, 0644);
53 MODULE_PARM_DESC(mcast_debug_level
,
54 "Enable multicast debug tracing if > 0");
57 static DEFINE_MUTEX(mcast_mutex
);
59 struct ipoib_mcast_iter
{
60 struct net_device
*dev
;
62 unsigned long created
;
63 unsigned int queuelen
;
64 unsigned int complete
;
65 unsigned int send_only
;
68 static void ipoib_mcast_free(struct ipoib_mcast
*mcast
)
70 struct net_device
*dev
= mcast
->dev
;
71 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
72 struct ipoib_neigh
*neigh
, *tmp
;
75 ipoib_dbg_mcast(netdev_priv(dev
), "deleting multicast group %pI6\n",
76 mcast
->mcmember
.mgid
.raw
);
78 spin_lock_irq(&priv
->lock
);
80 list_for_each_entry_safe(neigh
, tmp
, &mcast
->neigh_list
, list
) {
82 * It's safe to call ipoib_put_ah() inside priv->lock
83 * here, because we know that mcast->ah will always
84 * hold one more reference, so ipoib_put_ah() will
85 * never do more than decrement the ref count.
88 ipoib_put_ah(neigh
->ah
);
89 ipoib_neigh_free(dev
, neigh
);
92 spin_unlock_irq(&priv
->lock
);
95 ipoib_put_ah(mcast
->ah
);
97 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
99 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
102 netif_tx_lock_bh(dev
);
103 dev
->stats
.tx_dropped
+= tx_dropped
;
104 netif_tx_unlock_bh(dev
);
109 static struct ipoib_mcast
*ipoib_mcast_alloc(struct net_device
*dev
,
112 struct ipoib_mcast
*mcast
;
114 mcast
= kzalloc(sizeof *mcast
, can_sleep
? GFP_KERNEL
: GFP_ATOMIC
);
119 mcast
->created
= jiffies
;
122 INIT_LIST_HEAD(&mcast
->list
);
123 INIT_LIST_HEAD(&mcast
->neigh_list
);
124 skb_queue_head_init(&mcast
->pkt_queue
);
129 static struct ipoib_mcast
*__ipoib_mcast_find(struct net_device
*dev
, void *mgid
)
131 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
132 struct rb_node
*n
= priv
->multicast_tree
.rb_node
;
135 struct ipoib_mcast
*mcast
;
138 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
140 ret
= memcmp(mgid
, mcast
->mcmember
.mgid
.raw
,
141 sizeof (union ib_gid
));
153 static int __ipoib_mcast_add(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
155 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
156 struct rb_node
**n
= &priv
->multicast_tree
.rb_node
, *pn
= NULL
;
159 struct ipoib_mcast
*tmcast
;
163 tmcast
= rb_entry(pn
, struct ipoib_mcast
, rb_node
);
165 ret
= memcmp(mcast
->mcmember
.mgid
.raw
, tmcast
->mcmember
.mgid
.raw
,
166 sizeof (union ib_gid
));
175 rb_link_node(&mcast
->rb_node
, pn
, n
);
176 rb_insert_color(&mcast
->rb_node
, &priv
->multicast_tree
);
181 static int ipoib_mcast_join_finish(struct ipoib_mcast
*mcast
,
182 struct ib_sa_mcmember_rec
*mcmember
)
184 struct net_device
*dev
= mcast
->dev
;
185 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
190 mcast
->mcmember
= *mcmember
;
192 /* Set the cached Q_Key before we attach if it's the broadcast group */
193 if (!memcmp(mcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
194 sizeof (union ib_gid
))) {
195 spin_lock_irq(&priv
->lock
);
196 if (!priv
->broadcast
) {
197 spin_unlock_irq(&priv
->lock
);
200 priv
->qkey
= be32_to_cpu(priv
->broadcast
->mcmember
.qkey
);
201 spin_unlock_irq(&priv
->lock
);
202 priv
->tx_wr
.wr
.ud
.remote_qkey
= priv
->qkey
;
206 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
207 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
208 ipoib_warn(priv
, "multicast group %pI6 already attached\n",
209 mcast
->mcmember
.mgid
.raw
);
214 ret
= ipoib_mcast_attach(dev
, be16_to_cpu(mcast
->mcmember
.mlid
),
215 &mcast
->mcmember
.mgid
, set_qkey
);
217 ipoib_warn(priv
, "couldn't attach QP to multicast group %pI6\n",
218 mcast
->mcmember
.mgid
.raw
);
220 clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
);
226 struct ib_ah_attr av
= {
227 .dlid
= be16_to_cpu(mcast
->mcmember
.mlid
),
228 .port_num
= priv
->port
,
229 .sl
= mcast
->mcmember
.sl
,
230 .ah_flags
= IB_AH_GRH
,
231 .static_rate
= mcast
->mcmember
.rate
,
233 .flow_label
= be32_to_cpu(mcast
->mcmember
.flow_label
),
234 .hop_limit
= mcast
->mcmember
.hop_limit
,
236 .traffic_class
= mcast
->mcmember
.traffic_class
239 av
.grh
.dgid
= mcast
->mcmember
.mgid
;
241 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
243 ipoib_warn(priv
, "ib_address_create failed\n");
245 spin_lock_irq(&priv
->lock
);
247 spin_unlock_irq(&priv
->lock
);
249 ipoib_dbg_mcast(priv
, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n",
250 mcast
->mcmember
.mgid
.raw
,
252 be16_to_cpu(mcast
->mcmember
.mlid
),
257 /* actually send any queued packets */
258 netif_tx_lock_bh(dev
);
259 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
260 struct sk_buff
*skb
= skb_dequeue(&mcast
->pkt_queue
);
261 struct dst_entry
*dst
= skb_dst(skb
);
262 struct neighbour
*n
= NULL
;
264 netif_tx_unlock_bh(dev
);
268 n
= dst_get_neighbour(dst
);
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 netif_tx_lock_bh(dev
);
278 netif_tx_unlock_bh(dev
);
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
;
290 /* We trap for port events ourselves. */
291 if (status
== -ENETRESET
)
295 status
= ipoib_mcast_join_finish(mcast
, &multicast
->rec
);
298 if (mcast
->logcount
++ < 20)
299 ipoib_dbg_mcast(netdev_priv(dev
), "multicast join failed for %pI6, status %d\n",
300 mcast
->mcmember
.mgid
.raw
, status
);
302 /* Flush out any queued packets */
303 netif_tx_lock_bh(dev
);
304 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
305 ++dev
->stats
.tx_dropped
;
306 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
308 netif_tx_unlock_bh(dev
);
310 /* Clear the busy flag so we try again */
311 status
= test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
,
317 static int ipoib_mcast_sendonly_join(struct ipoib_mcast
*mcast
)
319 struct net_device
*dev
= mcast
->dev
;
320 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
321 struct ib_sa_mcmember_rec rec
= {
322 #if 0 /* Some SMs don't support send-only yet */
330 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
331 ipoib_dbg_mcast(priv
, "device shutting down, no multicast joins\n");
335 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
)) {
336 ipoib_dbg_mcast(priv
, "multicast entry busy, skipping\n");
340 rec
.mgid
= mcast
->mcmember
.mgid
;
341 rec
.port_gid
= priv
->local_gid
;
342 rec
.pkey
= cpu_to_be16(priv
->pkey
);
344 mcast
->mc
= ib_sa_join_multicast(&ipoib_sa_client
, priv
->ca
,
346 IB_SA_MCMEMBER_REC_MGID
|
347 IB_SA_MCMEMBER_REC_PORT_GID
|
348 IB_SA_MCMEMBER_REC_PKEY
|
349 IB_SA_MCMEMBER_REC_JOIN_STATE
,
351 ipoib_mcast_sendonly_join_complete
,
353 if (IS_ERR(mcast
->mc
)) {
354 ret
= PTR_ERR(mcast
->mc
);
355 clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
356 ipoib_warn(priv
, "ib_sa_join_multicast failed (ret = %d)\n",
359 ipoib_dbg_mcast(priv
, "no multicast record for %pI6, starting join\n",
360 mcast
->mcmember
.mgid
.raw
);
366 void ipoib_mcast_carrier_on_task(struct work_struct
*work
)
368 struct ipoib_dev_priv
*priv
= container_of(work
, struct ipoib_dev_priv
,
370 struct ib_port_attr attr
;
373 * Take rtnl_lock to avoid racing with ipoib_stop() and
374 * turning the carrier back on while a device is being
377 if (ib_query_port(priv
->ca
, priv
->port
, &attr
) ||
378 attr
.state
!= IB_PORT_ACTIVE
) {
379 ipoib_dbg(priv
, "Keeping carrier off until IB port is active\n");
384 netif_carrier_on(priv
->dev
);
388 static int ipoib_mcast_join_complete(int status
,
389 struct ib_sa_multicast
*multicast
)
391 struct ipoib_mcast
*mcast
= multicast
->context
;
392 struct net_device
*dev
= mcast
->dev
;
393 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
395 ipoib_dbg_mcast(priv
, "join completion for %pI6 (status %d)\n",
396 mcast
->mcmember
.mgid
.raw
, status
);
398 /* We trap for port events ourselves. */
399 if (status
== -ENETRESET
)
403 status
= ipoib_mcast_join_finish(mcast
, &multicast
->rec
);
407 mutex_lock(&mcast_mutex
);
408 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
409 queue_delayed_work(ipoib_workqueue
,
410 &priv
->mcast_task
, 0);
411 mutex_unlock(&mcast_mutex
);
414 * Defer carrier on work to ipoib_workqueue to avoid a
415 * deadlock on rtnl_lock here.
417 if (mcast
== priv
->broadcast
)
418 queue_work(ipoib_workqueue
, &priv
->carrier_on_task
);
423 if (mcast
->logcount
++ < 20) {
424 if (status
== -ETIMEDOUT
|| status
== -EAGAIN
) {
425 ipoib_dbg_mcast(priv
, "multicast join failed for %pI6, status %d\n",
426 mcast
->mcmember
.mgid
.raw
, status
);
428 ipoib_warn(priv
, "multicast join failed for %pI6, status %d\n",
429 mcast
->mcmember
.mgid
.raw
, status
);
434 if (mcast
->backoff
> IPOIB_MAX_BACKOFF_SECONDS
)
435 mcast
->backoff
= IPOIB_MAX_BACKOFF_SECONDS
;
437 /* Clear the busy flag so we try again */
438 status
= test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
440 mutex_lock(&mcast_mutex
);
441 spin_lock_irq(&priv
->lock
);
442 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
443 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
,
444 mcast
->backoff
* HZ
);
445 spin_unlock_irq(&priv
->lock
);
446 mutex_unlock(&mcast_mutex
);
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_mcmember_rec rec
= {
458 ib_sa_comp_mask comp_mask
;
461 ipoib_dbg_mcast(priv
, "joining MGID %pI6\n", mcast
->mcmember
.mgid
.raw
);
463 rec
.mgid
= mcast
->mcmember
.mgid
;
464 rec
.port_gid
= priv
->local_gid
;
465 rec
.pkey
= cpu_to_be16(priv
->pkey
);
468 IB_SA_MCMEMBER_REC_MGID
|
469 IB_SA_MCMEMBER_REC_PORT_GID
|
470 IB_SA_MCMEMBER_REC_PKEY
|
471 IB_SA_MCMEMBER_REC_JOIN_STATE
;
475 IB_SA_MCMEMBER_REC_QKEY
|
476 IB_SA_MCMEMBER_REC_MTU_SELECTOR
|
477 IB_SA_MCMEMBER_REC_MTU
|
478 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
|
479 IB_SA_MCMEMBER_REC_RATE_SELECTOR
|
480 IB_SA_MCMEMBER_REC_RATE
|
481 IB_SA_MCMEMBER_REC_SL
|
482 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
483 IB_SA_MCMEMBER_REC_HOP_LIMIT
;
485 rec
.qkey
= priv
->broadcast
->mcmember
.qkey
;
486 rec
.mtu_selector
= IB_SA_EQ
;
487 rec
.mtu
= priv
->broadcast
->mcmember
.mtu
;
488 rec
.traffic_class
= priv
->broadcast
->mcmember
.traffic_class
;
489 rec
.rate_selector
= IB_SA_EQ
;
490 rec
.rate
= priv
->broadcast
->mcmember
.rate
;
491 rec
.sl
= priv
->broadcast
->mcmember
.sl
;
492 rec
.flow_label
= priv
->broadcast
->mcmember
.flow_label
;
493 rec
.hop_limit
= priv
->broadcast
->mcmember
.hop_limit
;
496 set_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
497 mcast
->mc
= 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(mcast
->mc
)) {
501 clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
502 ret
= PTR_ERR(mcast
->mc
);
503 ipoib_warn(priv
, "ib_sa_join_multicast 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
);
518 void ipoib_mcast_join_task(struct work_struct
*work
)
520 struct ipoib_dev_priv
*priv
=
521 container_of(work
, struct ipoib_dev_priv
, mcast_task
.work
);
522 struct net_device
*dev
= 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_query_gid() 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
;
538 ipoib_warn(priv
, "ib_query_port failed\n");
541 if (!priv
->broadcast
) {
542 struct ipoib_mcast
*broadcast
;
544 if (!test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
547 broadcast
= ipoib_mcast_alloc(dev
, 1);
549 ipoib_warn(priv
, "failed to allocate broadcast group\n");
550 mutex_lock(&mcast_mutex
);
551 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
552 queue_delayed_work(ipoib_workqueue
,
553 &priv
->mcast_task
, HZ
);
554 mutex_unlock(&mcast_mutex
);
558 spin_lock_irq(&priv
->lock
);
559 memcpy(broadcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
560 sizeof (union ib_gid
));
561 priv
->broadcast
= broadcast
;
563 __ipoib_mcast_add(dev
, priv
->broadcast
);
564 spin_unlock_irq(&priv
->lock
);
567 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
568 if (!test_bit(IPOIB_MCAST_FLAG_BUSY
, &priv
->broadcast
->flags
))
569 ipoib_mcast_join(dev
, priv
->broadcast
, 0);
574 struct ipoib_mcast
*mcast
= NULL
;
576 spin_lock_irq(&priv
->lock
);
577 list_for_each_entry(mcast
, &priv
->multicast_list
, list
) {
578 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)
579 && !test_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
)
580 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
581 /* Found the next unjoined group */
585 spin_unlock_irq(&priv
->lock
);
587 if (&mcast
->list
== &priv
->multicast_list
) {
592 ipoib_mcast_join(dev
, mcast
, 1);
596 priv
->mcast_mtu
= IPOIB_UD_MTU(ib_mtu_enum_to_int(priv
->broadcast
->mcmember
.mtu
));
598 if (!ipoib_cm_admin_enabled(dev
)) {
600 dev_set_mtu(dev
, min(priv
->mcast_mtu
, priv
->admin_mtu
));
604 ipoib_dbg_mcast(priv
, "successfully joined all multicast groups\n");
606 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
609 int ipoib_mcast_start_thread(struct net_device
*dev
)
611 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
613 ipoib_dbg_mcast(priv
, "starting multicast thread\n");
615 mutex_lock(&mcast_mutex
);
616 if (!test_and_set_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
617 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
, 0);
618 mutex_unlock(&mcast_mutex
);
623 int ipoib_mcast_stop_thread(struct net_device
*dev
, int flush
)
625 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
627 ipoib_dbg_mcast(priv
, "stopping multicast thread\n");
629 mutex_lock(&mcast_mutex
);
630 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
631 cancel_delayed_work(&priv
->mcast_task
);
632 mutex_unlock(&mcast_mutex
);
635 flush_workqueue(ipoib_workqueue
);
640 static int ipoib_mcast_leave(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
642 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
645 if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
))
646 ib_sa_free_multicast(mcast
->mc
);
648 if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
649 ipoib_dbg_mcast(priv
, "leaving MGID %pI6\n",
650 mcast
->mcmember
.mgid
.raw
);
652 /* Remove ourselves from the multicast group */
653 ret
= ib_detach_mcast(priv
->qp
, &mcast
->mcmember
.mgid
,
654 be16_to_cpu(mcast
->mcmember
.mlid
));
656 ipoib_warn(priv
, "ib_detach_mcast failed (result = %d)\n", ret
);
662 void ipoib_mcast_send(struct net_device
*dev
, void *mgid
, struct sk_buff
*skb
)
664 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
665 struct ipoib_mcast
*mcast
;
668 spin_lock_irqsave(&priv
->lock
, flags
);
670 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
) ||
672 !test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
673 ++dev
->stats
.tx_dropped
;
674 dev_kfree_skb_any(skb
);
678 mcast
= __ipoib_mcast_find(dev
, mgid
);
680 /* Let's create a new send only group now */
681 ipoib_dbg_mcast(priv
, "setting up send only multicast group for %pI6\n",
684 mcast
= ipoib_mcast_alloc(dev
, 0);
686 ipoib_warn(priv
, "unable to allocate memory for "
687 "multicast structure\n");
688 ++dev
->stats
.tx_dropped
;
689 dev_kfree_skb_any(skb
);
693 set_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
);
694 memcpy(mcast
->mcmember
.mgid
.raw
, mgid
, sizeof (union ib_gid
));
695 __ipoib_mcast_add(dev
, mcast
);
696 list_add_tail(&mcast
->list
, &priv
->multicast_list
);
700 if (skb_queue_len(&mcast
->pkt_queue
) < IPOIB_MAX_MCAST_QUEUE
)
701 skb_queue_tail(&mcast
->pkt_queue
, skb
);
703 ++dev
->stats
.tx_dropped
;
704 dev_kfree_skb_any(skb
);
707 if (test_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
))
708 ipoib_dbg_mcast(priv
, "no address vector, "
709 "but multicast join already started\n");
710 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
))
711 ipoib_mcast_sendonly_join(mcast
);
714 * If lookup completes between here and out:, don't
715 * want to send packet twice.
721 if (mcast
&& mcast
->ah
) {
722 struct dst_entry
*dst
= skb_dst(skb
);
723 struct neighbour
*n
= NULL
;
725 n
= dst_get_neighbour(dst
);
726 if (n
&& !*to_ipoib_neigh(n
)) {
727 struct ipoib_neigh
*neigh
= ipoib_neigh_alloc(n
,
731 kref_get(&mcast
->ah
->ref
);
732 neigh
->ah
= mcast
->ah
;
733 list_add_tail(&neigh
->list
, &mcast
->neigh_list
);
737 spin_unlock_irqrestore(&priv
->lock
, flags
);
738 ipoib_send(dev
, skb
, mcast
->ah
, IB_MULTICAST_QPN
);
743 spin_unlock_irqrestore(&priv
->lock
, flags
);
746 void ipoib_mcast_dev_flush(struct net_device
*dev
)
748 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
749 LIST_HEAD(remove_list
);
750 struct ipoib_mcast
*mcast
, *tmcast
;
753 ipoib_dbg_mcast(priv
, "flushing multicast list\n");
755 spin_lock_irqsave(&priv
->lock
, flags
);
757 list_for_each_entry_safe(mcast
, tmcast
, &priv
->multicast_list
, list
) {
758 list_del(&mcast
->list
);
759 rb_erase(&mcast
->rb_node
, &priv
->multicast_tree
);
760 list_add_tail(&mcast
->list
, &remove_list
);
763 if (priv
->broadcast
) {
764 rb_erase(&priv
->broadcast
->rb_node
, &priv
->multicast_tree
);
765 list_add_tail(&priv
->broadcast
->list
, &remove_list
);
766 priv
->broadcast
= NULL
;
769 spin_unlock_irqrestore(&priv
->lock
, flags
);
771 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
772 ipoib_mcast_leave(dev
, mcast
);
773 ipoib_mcast_free(mcast
);
777 static int ipoib_mcast_addr_is_valid(const u8
*addr
, const u8
*broadcast
)
779 /* reserved QPN, prefix, scope */
780 if (memcmp(addr
, broadcast
, 6))
782 /* signature lower, pkey */
783 if (memcmp(addr
+ 7, broadcast
+ 7, 3))
788 void ipoib_mcast_restart_task(struct work_struct
*work
)
790 struct ipoib_dev_priv
*priv
=
791 container_of(work
, struct ipoib_dev_priv
, restart_task
);
792 struct net_device
*dev
= priv
->dev
;
793 struct netdev_hw_addr
*ha
;
794 struct ipoib_mcast
*mcast
, *tmcast
;
795 LIST_HEAD(remove_list
);
797 struct ib_sa_mcmember_rec rec
;
799 ipoib_dbg_mcast(priv
, "restarting multicast task\n");
801 ipoib_mcast_stop_thread(dev
, 0);
803 local_irq_save(flags
);
804 netif_addr_lock(dev
);
805 spin_lock(&priv
->lock
);
808 * Unfortunately, the networking core only gives us a list of all of
809 * the multicast hardware addresses. We need to figure out which ones
810 * are new and which ones have been removed
813 /* Clear out the found flag */
814 list_for_each_entry(mcast
, &priv
->multicast_list
, list
)
815 clear_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
);
817 /* Mark all of the entries that are found or don't exist */
818 netdev_for_each_mc_addr(ha
, dev
) {
821 if (!ipoib_mcast_addr_is_valid(ha
->addr
, dev
->broadcast
))
824 memcpy(mgid
.raw
, ha
->addr
+ 4, sizeof mgid
);
826 mcast
= __ipoib_mcast_find(dev
, &mgid
);
827 if (!mcast
|| test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
828 struct ipoib_mcast
*nmcast
;
830 /* ignore group which is directly joined by userspace */
831 if (test_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
) &&
832 !ib_sa_get_mcmember_rec(priv
->ca
, priv
->port
, &mgid
, &rec
)) {
833 ipoib_dbg_mcast(priv
, "ignoring multicast entry for mgid %pI6\n",
838 /* Not found or send-only group, let's add a new entry */
839 ipoib_dbg_mcast(priv
, "adding multicast entry for mgid %pI6\n",
842 nmcast
= ipoib_mcast_alloc(dev
, 0);
844 ipoib_warn(priv
, "unable to allocate memory for multicast structure\n");
848 set_bit(IPOIB_MCAST_FLAG_FOUND
, &nmcast
->flags
);
850 nmcast
->mcmember
.mgid
= mgid
;
853 /* Destroy the send only entry */
854 list_move_tail(&mcast
->list
, &remove_list
);
856 rb_replace_node(&mcast
->rb_node
,
858 &priv
->multicast_tree
);
860 __ipoib_mcast_add(dev
, nmcast
);
862 list_add_tail(&nmcast
->list
, &priv
->multicast_list
);
866 set_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
);
869 /* Remove all of the entries don't exist anymore */
870 list_for_each_entry_safe(mcast
, tmcast
, &priv
->multicast_list
, list
) {
871 if (!test_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
) &&
872 !test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
873 ipoib_dbg_mcast(priv
, "deleting multicast group %pI6\n",
874 mcast
->mcmember
.mgid
.raw
);
876 rb_erase(&mcast
->rb_node
, &priv
->multicast_tree
);
878 /* Move to the remove list */
879 list_move_tail(&mcast
->list
, &remove_list
);
883 spin_unlock(&priv
->lock
);
884 netif_addr_unlock(dev
);
885 local_irq_restore(flags
);
887 /* We have to cancel outside of the spinlock */
888 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
889 ipoib_mcast_leave(mcast
->dev
, mcast
);
890 ipoib_mcast_free(mcast
);
893 if (test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
894 ipoib_mcast_start_thread(dev
);
897 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
899 struct ipoib_mcast_iter
*ipoib_mcast_iter_init(struct net_device
*dev
)
901 struct ipoib_mcast_iter
*iter
;
903 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
908 memset(iter
->mgid
.raw
, 0, 16);
910 if (ipoib_mcast_iter_next(iter
)) {
918 int ipoib_mcast_iter_next(struct ipoib_mcast_iter
*iter
)
920 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
922 struct ipoib_mcast
*mcast
;
925 spin_lock_irq(&priv
->lock
);
927 n
= rb_first(&priv
->multicast_tree
);
930 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
932 if (memcmp(iter
->mgid
.raw
, mcast
->mcmember
.mgid
.raw
,
933 sizeof (union ib_gid
)) < 0) {
934 iter
->mgid
= mcast
->mcmember
.mgid
;
935 iter
->created
= mcast
->created
;
936 iter
->queuelen
= skb_queue_len(&mcast
->pkt_queue
);
937 iter
->complete
= !!mcast
->ah
;
938 iter
->send_only
= !!(mcast
->flags
& (1 << IPOIB_MCAST_FLAG_SENDONLY
));
948 spin_unlock_irq(&priv
->lock
);
953 void ipoib_mcast_iter_read(struct ipoib_mcast_iter
*iter
,
955 unsigned long *created
,
956 unsigned int *queuelen
,
957 unsigned int *complete
,
958 unsigned int *send_only
)
961 *created
= iter
->created
;
962 *queuelen
= iter
->queuelen
;
963 *complete
= iter
->complete
;
964 *send_only
= iter
->send_only
;
967 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */