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 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
;
74 ipoib_dbg_mcast(netdev_priv(dev
), "deleting multicast group %pI6\n",
75 mcast
->mcmember
.mgid
.raw
);
77 /* remove all neigh connected to this mcast */
78 ipoib_del_neighs_by_gid(dev
, mcast
->mcmember
.mgid
.raw
);
81 ipoib_put_ah(mcast
->ah
);
83 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
85 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
88 netif_tx_lock_bh(dev
);
89 dev
->stats
.tx_dropped
+= tx_dropped
;
90 netif_tx_unlock_bh(dev
);
95 static struct ipoib_mcast
*ipoib_mcast_alloc(struct net_device
*dev
,
98 struct ipoib_mcast
*mcast
;
100 mcast
= kzalloc(sizeof *mcast
, can_sleep
? GFP_KERNEL
: GFP_ATOMIC
);
105 mcast
->created
= jiffies
;
108 INIT_LIST_HEAD(&mcast
->list
);
109 INIT_LIST_HEAD(&mcast
->neigh_list
);
110 skb_queue_head_init(&mcast
->pkt_queue
);
115 static struct ipoib_mcast
*__ipoib_mcast_find(struct net_device
*dev
, void *mgid
)
117 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
118 struct rb_node
*n
= priv
->multicast_tree
.rb_node
;
121 struct ipoib_mcast
*mcast
;
124 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
126 ret
= memcmp(mgid
, mcast
->mcmember
.mgid
.raw
,
127 sizeof (union ib_gid
));
139 static int __ipoib_mcast_add(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
141 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
142 struct rb_node
**n
= &priv
->multicast_tree
.rb_node
, *pn
= NULL
;
145 struct ipoib_mcast
*tmcast
;
149 tmcast
= rb_entry(pn
, struct ipoib_mcast
, rb_node
);
151 ret
= memcmp(mcast
->mcmember
.mgid
.raw
, tmcast
->mcmember
.mgid
.raw
,
152 sizeof (union ib_gid
));
161 rb_link_node(&mcast
->rb_node
, pn
, n
);
162 rb_insert_color(&mcast
->rb_node
, &priv
->multicast_tree
);
167 static int ipoib_mcast_join_finish(struct ipoib_mcast
*mcast
,
168 struct ib_sa_mcmember_rec
*mcmember
)
170 struct net_device
*dev
= mcast
->dev
;
171 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
176 mcast
->mcmember
= *mcmember
;
178 /* Set the multicast MTU and cached Q_Key before we attach if it's
179 * the broadcast group.
181 if (!memcmp(mcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
182 sizeof (union ib_gid
))) {
183 spin_lock_irq(&priv
->lock
);
184 if (!priv
->broadcast
) {
185 spin_unlock_irq(&priv
->lock
);
188 priv
->mcast_mtu
= IPOIB_UD_MTU(ib_mtu_enum_to_int(priv
->broadcast
->mcmember
.mtu
));
189 priv
->qkey
= be32_to_cpu(priv
->broadcast
->mcmember
.qkey
);
190 spin_unlock_irq(&priv
->lock
);
191 priv
->tx_wr
.wr
.ud
.remote_qkey
= priv
->qkey
;
194 if (!ipoib_cm_admin_enabled(dev
)) {
196 dev_set_mtu(dev
, min(priv
->mcast_mtu
, priv
->admin_mtu
));
201 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
202 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
203 ipoib_warn(priv
, "multicast group %pI6 already attached\n",
204 mcast
->mcmember
.mgid
.raw
);
209 ret
= ipoib_mcast_attach(dev
, be16_to_cpu(mcast
->mcmember
.mlid
),
210 &mcast
->mcmember
.mgid
, set_qkey
);
212 ipoib_warn(priv
, "couldn't attach QP to multicast group %pI6\n",
213 mcast
->mcmember
.mgid
.raw
);
215 clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
);
221 struct ib_ah_attr av
= {
222 .dlid
= be16_to_cpu(mcast
->mcmember
.mlid
),
223 .port_num
= priv
->port
,
224 .sl
= mcast
->mcmember
.sl
,
225 .ah_flags
= IB_AH_GRH
,
226 .static_rate
= mcast
->mcmember
.rate
,
228 .flow_label
= be32_to_cpu(mcast
->mcmember
.flow_label
),
229 .hop_limit
= mcast
->mcmember
.hop_limit
,
231 .traffic_class
= mcast
->mcmember
.traffic_class
234 av
.grh
.dgid
= mcast
->mcmember
.mgid
;
236 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
238 ipoib_warn(priv
, "ib_address_create failed %ld\n",
240 /* use original error */
243 spin_lock_irq(&priv
->lock
);
245 spin_unlock_irq(&priv
->lock
);
247 ipoib_dbg_mcast(priv
, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n",
248 mcast
->mcmember
.mgid
.raw
,
250 be16_to_cpu(mcast
->mcmember
.mlid
),
255 /* actually send any queued packets */
256 netif_tx_lock_bh(dev
);
257 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
258 struct sk_buff
*skb
= skb_dequeue(&mcast
->pkt_queue
);
260 netif_tx_unlock_bh(dev
);
263 if (dev_queue_xmit(skb
))
264 ipoib_warn(priv
, "dev_queue_xmit failed to requeue packet\n");
266 netif_tx_lock_bh(dev
);
268 netif_tx_unlock_bh(dev
);
274 ipoib_mcast_sendonly_join_complete(int status
,
275 struct ib_sa_multicast
*multicast
)
277 struct ipoib_mcast
*mcast
= multicast
->context
;
278 struct net_device
*dev
= mcast
->dev
;
280 /* We trap for port events ourselves. */
281 if (status
== -ENETRESET
)
285 status
= ipoib_mcast_join_finish(mcast
, &multicast
->rec
);
288 if (mcast
->logcount
++ < 20)
289 ipoib_dbg_mcast(netdev_priv(dev
), "multicast join failed for %pI6, status %d\n",
290 mcast
->mcmember
.mgid
.raw
, status
);
292 /* Flush out any queued packets */
293 netif_tx_lock_bh(dev
);
294 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
295 ++dev
->stats
.tx_dropped
;
296 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
298 netif_tx_unlock_bh(dev
);
300 /* Clear the busy flag so we try again */
301 status
= test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
,
307 static int ipoib_mcast_sendonly_join(struct ipoib_mcast
*mcast
)
309 struct net_device
*dev
= mcast
->dev
;
310 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
311 struct ib_sa_mcmember_rec rec
= {
312 #if 0 /* Some SMs don't support send-only yet */
320 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
321 ipoib_dbg_mcast(priv
, "device shutting down, no multicast joins\n");
325 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
)) {
326 ipoib_dbg_mcast(priv
, "multicast entry busy, skipping\n");
330 rec
.mgid
= mcast
->mcmember
.mgid
;
331 rec
.port_gid
= priv
->local_gid
;
332 rec
.pkey
= cpu_to_be16(priv
->pkey
);
334 mcast
->mc
= ib_sa_join_multicast(&ipoib_sa_client
, priv
->ca
,
336 IB_SA_MCMEMBER_REC_MGID
|
337 IB_SA_MCMEMBER_REC_PORT_GID
|
338 IB_SA_MCMEMBER_REC_PKEY
|
339 IB_SA_MCMEMBER_REC_JOIN_STATE
,
341 ipoib_mcast_sendonly_join_complete
,
343 if (IS_ERR(mcast
->mc
)) {
344 ret
= PTR_ERR(mcast
->mc
);
345 clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
346 ipoib_warn(priv
, "ib_sa_join_multicast failed (ret = %d)\n",
349 ipoib_dbg_mcast(priv
, "no multicast record for %pI6, starting join\n",
350 mcast
->mcmember
.mgid
.raw
);
356 void ipoib_mcast_carrier_on_task(struct work_struct
*work
)
358 struct ipoib_dev_priv
*priv
= container_of(work
, struct ipoib_dev_priv
,
360 struct ib_port_attr attr
;
363 * Take rtnl_lock to avoid racing with ipoib_stop() and
364 * turning the carrier back on while a device is being
367 if (ib_query_port(priv
->ca
, priv
->port
, &attr
) ||
368 attr
.state
!= IB_PORT_ACTIVE
) {
369 ipoib_dbg(priv
, "Keeping carrier off until IB port is active\n");
374 netif_carrier_on(priv
->dev
);
378 static int ipoib_mcast_join_complete(int status
,
379 struct ib_sa_multicast
*multicast
)
381 struct ipoib_mcast
*mcast
= multicast
->context
;
382 struct net_device
*dev
= mcast
->dev
;
383 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
385 ipoib_dbg_mcast(priv
, "join completion for %pI6 (status %d)\n",
386 mcast
->mcmember
.mgid
.raw
, status
);
388 /* We trap for port events ourselves. */
389 if (status
== -ENETRESET
) {
395 status
= ipoib_mcast_join_finish(mcast
, &multicast
->rec
);
399 mutex_lock(&mcast_mutex
);
400 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
401 queue_delayed_work(ipoib_workqueue
,
402 &priv
->mcast_task
, 0);
403 mutex_unlock(&mcast_mutex
);
406 * Defer carrier on work to ipoib_workqueue to avoid a
407 * deadlock on rtnl_lock here.
409 if (mcast
== priv
->broadcast
)
410 queue_work(ipoib_workqueue
, &priv
->carrier_on_task
);
416 if (mcast
->logcount
++ < 20) {
417 if (status
== -ETIMEDOUT
|| status
== -EAGAIN
) {
418 ipoib_dbg_mcast(priv
, "multicast join failed for %pI6, status %d\n",
419 mcast
->mcmember
.mgid
.raw
, status
);
421 ipoib_warn(priv
, "multicast join failed for %pI6, status %d\n",
422 mcast
->mcmember
.mgid
.raw
, status
);
427 if (mcast
->backoff
> IPOIB_MAX_BACKOFF_SECONDS
)
428 mcast
->backoff
= IPOIB_MAX_BACKOFF_SECONDS
;
430 /* Clear the busy flag so we try again */
431 status
= test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
433 mutex_lock(&mcast_mutex
);
434 spin_lock_irq(&priv
->lock
);
435 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
436 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
,
437 mcast
->backoff
* HZ
);
438 spin_unlock_irq(&priv
->lock
);
439 mutex_unlock(&mcast_mutex
);
441 complete(&mcast
->done
);
445 static void ipoib_mcast_join(struct net_device
*dev
, struct ipoib_mcast
*mcast
,
448 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
449 struct ib_sa_mcmember_rec rec
= {
452 ib_sa_comp_mask comp_mask
;
455 ipoib_dbg_mcast(priv
, "joining MGID %pI6\n", mcast
->mcmember
.mgid
.raw
);
457 rec
.mgid
= mcast
->mcmember
.mgid
;
458 rec
.port_gid
= priv
->local_gid
;
459 rec
.pkey
= cpu_to_be16(priv
->pkey
);
462 IB_SA_MCMEMBER_REC_MGID
|
463 IB_SA_MCMEMBER_REC_PORT_GID
|
464 IB_SA_MCMEMBER_REC_PKEY
|
465 IB_SA_MCMEMBER_REC_JOIN_STATE
;
469 IB_SA_MCMEMBER_REC_QKEY
|
470 IB_SA_MCMEMBER_REC_MTU_SELECTOR
|
471 IB_SA_MCMEMBER_REC_MTU
|
472 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
|
473 IB_SA_MCMEMBER_REC_RATE_SELECTOR
|
474 IB_SA_MCMEMBER_REC_RATE
|
475 IB_SA_MCMEMBER_REC_SL
|
476 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
477 IB_SA_MCMEMBER_REC_HOP_LIMIT
;
479 rec
.qkey
= priv
->broadcast
->mcmember
.qkey
;
480 rec
.mtu_selector
= IB_SA_EQ
;
481 rec
.mtu
= priv
->broadcast
->mcmember
.mtu
;
482 rec
.traffic_class
= priv
->broadcast
->mcmember
.traffic_class
;
483 rec
.rate_selector
= IB_SA_EQ
;
484 rec
.rate
= priv
->broadcast
->mcmember
.rate
;
485 rec
.sl
= priv
->broadcast
->mcmember
.sl
;
486 rec
.flow_label
= priv
->broadcast
->mcmember
.flow_label
;
487 rec
.hop_limit
= priv
->broadcast
->mcmember
.hop_limit
;
490 set_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
491 init_completion(&mcast
->done
);
492 set_bit(IPOIB_MCAST_JOIN_STARTED
, &mcast
->flags
);
494 mcast
->mc
= ib_sa_join_multicast(&ipoib_sa_client
, priv
->ca
, priv
->port
,
495 &rec
, comp_mask
, GFP_KERNEL
,
496 ipoib_mcast_join_complete
, mcast
);
497 if (IS_ERR(mcast
->mc
)) {
498 clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
499 complete(&mcast
->done
);
500 ret
= PTR_ERR(mcast
->mc
);
501 ipoib_warn(priv
, "ib_sa_join_multicast failed, status %d\n", ret
);
504 if (mcast
->backoff
> IPOIB_MAX_BACKOFF_SECONDS
)
505 mcast
->backoff
= IPOIB_MAX_BACKOFF_SECONDS
;
507 mutex_lock(&mcast_mutex
);
508 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
509 queue_delayed_work(ipoib_workqueue
,
511 mcast
->backoff
* HZ
);
512 mutex_unlock(&mcast_mutex
);
516 void ipoib_mcast_join_task(struct work_struct
*work
)
518 struct ipoib_dev_priv
*priv
=
519 container_of(work
, struct ipoib_dev_priv
, mcast_task
.work
);
520 struct net_device
*dev
= priv
->dev
;
521 struct ib_port_attr port_attr
;
523 if (!test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
526 if (ib_query_port(priv
->ca
, priv
->port
, &port_attr
) ||
527 port_attr
.state
!= IB_PORT_ACTIVE
) {
528 ipoib_dbg(priv
, "port state is not ACTIVE (state = %d) suspending join task\n",
532 priv
->local_lid
= port_attr
.lid
;
534 if (ib_query_gid(priv
->ca
, priv
->port
, 0, &priv
->local_gid
))
535 ipoib_warn(priv
, "ib_query_gid() failed\n");
537 memcpy(priv
->dev
->dev_addr
+ 4, priv
->local_gid
.raw
, sizeof (union ib_gid
));
539 if (!priv
->broadcast
) {
540 struct ipoib_mcast
*broadcast
;
542 if (!test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
545 broadcast
= ipoib_mcast_alloc(dev
, 1);
547 ipoib_warn(priv
, "failed to allocate broadcast group\n");
548 mutex_lock(&mcast_mutex
);
549 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
550 queue_delayed_work(ipoib_workqueue
,
551 &priv
->mcast_task
, HZ
);
552 mutex_unlock(&mcast_mutex
);
556 spin_lock_irq(&priv
->lock
);
557 memcpy(broadcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
558 sizeof (union ib_gid
));
559 priv
->broadcast
= broadcast
;
561 __ipoib_mcast_add(dev
, priv
->broadcast
);
562 spin_unlock_irq(&priv
->lock
);
565 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
566 if (!test_bit(IPOIB_MCAST_FLAG_BUSY
, &priv
->broadcast
->flags
))
567 ipoib_mcast_join(dev
, priv
->broadcast
, 0);
572 struct ipoib_mcast
*mcast
= NULL
;
574 spin_lock_irq(&priv
->lock
);
575 list_for_each_entry(mcast
, &priv
->multicast_list
, list
) {
576 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)
577 && !test_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
)
578 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
579 /* Found the next unjoined group */
583 spin_unlock_irq(&priv
->lock
);
585 if (&mcast
->list
== &priv
->multicast_list
) {
590 ipoib_mcast_join(dev
, mcast
, 1);
594 ipoib_dbg_mcast(priv
, "successfully joined all multicast groups\n");
596 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
599 int ipoib_mcast_start_thread(struct net_device
*dev
)
601 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
603 ipoib_dbg_mcast(priv
, "starting multicast thread\n");
605 mutex_lock(&mcast_mutex
);
606 if (!test_and_set_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
607 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
, 0);
608 mutex_unlock(&mcast_mutex
);
613 int ipoib_mcast_stop_thread(struct net_device
*dev
, int flush
)
615 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
617 ipoib_dbg_mcast(priv
, "stopping multicast thread\n");
619 mutex_lock(&mcast_mutex
);
620 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
621 cancel_delayed_work(&priv
->mcast_task
);
622 mutex_unlock(&mcast_mutex
);
625 flush_workqueue(ipoib_workqueue
);
630 static int ipoib_mcast_leave(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
632 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
635 if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
))
636 ib_sa_free_multicast(mcast
->mc
);
638 if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
639 ipoib_dbg_mcast(priv
, "leaving MGID %pI6\n",
640 mcast
->mcmember
.mgid
.raw
);
642 /* Remove ourselves from the multicast group */
643 ret
= ib_detach_mcast(priv
->qp
, &mcast
->mcmember
.mgid
,
644 be16_to_cpu(mcast
->mcmember
.mlid
));
646 ipoib_warn(priv
, "ib_detach_mcast failed (result = %d)\n", ret
);
652 void ipoib_mcast_send(struct net_device
*dev
, u8
*daddr
, struct sk_buff
*skb
)
654 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
655 struct ipoib_mcast
*mcast
;
657 void *mgid
= daddr
+ 4;
659 spin_lock_irqsave(&priv
->lock
, flags
);
661 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
) ||
663 !test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
664 ++dev
->stats
.tx_dropped
;
665 dev_kfree_skb_any(skb
);
669 mcast
= __ipoib_mcast_find(dev
, mgid
);
671 /* Let's create a new send only group now */
672 ipoib_dbg_mcast(priv
, "setting up send only multicast group for %pI6\n",
675 mcast
= ipoib_mcast_alloc(dev
, 0);
677 ipoib_warn(priv
, "unable to allocate memory for "
678 "multicast structure\n");
679 ++dev
->stats
.tx_dropped
;
680 dev_kfree_skb_any(skb
);
684 set_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
);
685 memcpy(mcast
->mcmember
.mgid
.raw
, mgid
, sizeof (union ib_gid
));
686 __ipoib_mcast_add(dev
, mcast
);
687 list_add_tail(&mcast
->list
, &priv
->multicast_list
);
691 if (skb_queue_len(&mcast
->pkt_queue
) < IPOIB_MAX_MCAST_QUEUE
)
692 skb_queue_tail(&mcast
->pkt_queue
, skb
);
694 ++dev
->stats
.tx_dropped
;
695 dev_kfree_skb_any(skb
);
698 if (test_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
))
699 ipoib_dbg_mcast(priv
, "no address vector, "
700 "but multicast join already started\n");
701 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
))
702 ipoib_mcast_sendonly_join(mcast
);
705 * If lookup completes between here and out:, don't
706 * want to send packet twice.
712 if (mcast
&& mcast
->ah
) {
713 struct ipoib_neigh
*neigh
;
715 spin_unlock_irqrestore(&priv
->lock
, flags
);
716 neigh
= ipoib_neigh_get(dev
, daddr
);
717 spin_lock_irqsave(&priv
->lock
, flags
);
719 neigh
= ipoib_neigh_alloc(daddr
, dev
);
721 kref_get(&mcast
->ah
->ref
);
722 neigh
->ah
= mcast
->ah
;
723 list_add_tail(&neigh
->list
, &mcast
->neigh_list
);
726 spin_unlock_irqrestore(&priv
->lock
, flags
);
727 ipoib_send(dev
, skb
, mcast
->ah
, IB_MULTICAST_QPN
);
729 ipoib_neigh_put(neigh
);
734 spin_unlock_irqrestore(&priv
->lock
, flags
);
737 void ipoib_mcast_dev_flush(struct net_device
*dev
)
739 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
740 LIST_HEAD(remove_list
);
741 struct ipoib_mcast
*mcast
, *tmcast
;
744 ipoib_dbg_mcast(priv
, "flushing multicast list\n");
746 spin_lock_irqsave(&priv
->lock
, flags
);
748 list_for_each_entry_safe(mcast
, tmcast
, &priv
->multicast_list
, list
) {
749 list_del(&mcast
->list
);
750 rb_erase(&mcast
->rb_node
, &priv
->multicast_tree
);
751 list_add_tail(&mcast
->list
, &remove_list
);
754 if (priv
->broadcast
) {
755 rb_erase(&priv
->broadcast
->rb_node
, &priv
->multicast_tree
);
756 list_add_tail(&priv
->broadcast
->list
, &remove_list
);
757 priv
->broadcast
= NULL
;
760 spin_unlock_irqrestore(&priv
->lock
, flags
);
762 /* seperate between the wait to the leave*/
763 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
)
764 if (test_bit(IPOIB_MCAST_JOIN_STARTED
, &mcast
->flags
))
765 wait_for_completion(&mcast
->done
);
767 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
768 ipoib_mcast_leave(dev
, mcast
);
769 ipoib_mcast_free(mcast
);
773 static int ipoib_mcast_addr_is_valid(const u8
*addr
, const u8
*broadcast
)
775 /* reserved QPN, prefix, scope */
776 if (memcmp(addr
, broadcast
, 6))
778 /* signature lower, pkey */
779 if (memcmp(addr
+ 7, broadcast
+ 7, 3))
784 void ipoib_mcast_restart_task(struct work_struct
*work
)
786 struct ipoib_dev_priv
*priv
=
787 container_of(work
, struct ipoib_dev_priv
, restart_task
);
788 struct net_device
*dev
= priv
->dev
;
789 struct netdev_hw_addr
*ha
;
790 struct ipoib_mcast
*mcast
, *tmcast
;
791 LIST_HEAD(remove_list
);
793 struct ib_sa_mcmember_rec rec
;
795 ipoib_dbg_mcast(priv
, "restarting multicast task\n");
797 ipoib_mcast_stop_thread(dev
, 0);
799 local_irq_save(flags
);
800 netif_addr_lock(dev
);
801 spin_lock(&priv
->lock
);
804 * Unfortunately, the networking core only gives us a list of all of
805 * the multicast hardware addresses. We need to figure out which ones
806 * are new and which ones have been removed
809 /* Clear out the found flag */
810 list_for_each_entry(mcast
, &priv
->multicast_list
, list
)
811 clear_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
);
813 /* Mark all of the entries that are found or don't exist */
814 netdev_for_each_mc_addr(ha
, dev
) {
817 if (!ipoib_mcast_addr_is_valid(ha
->addr
, dev
->broadcast
))
820 memcpy(mgid
.raw
, ha
->addr
+ 4, sizeof mgid
);
822 mcast
= __ipoib_mcast_find(dev
, &mgid
);
823 if (!mcast
|| test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
824 struct ipoib_mcast
*nmcast
;
826 /* ignore group which is directly joined by userspace */
827 if (test_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
) &&
828 !ib_sa_get_mcmember_rec(priv
->ca
, priv
->port
, &mgid
, &rec
)) {
829 ipoib_dbg_mcast(priv
, "ignoring multicast entry for mgid %pI6\n",
834 /* Not found or send-only group, let's add a new entry */
835 ipoib_dbg_mcast(priv
, "adding multicast entry for mgid %pI6\n",
838 nmcast
= ipoib_mcast_alloc(dev
, 0);
840 ipoib_warn(priv
, "unable to allocate memory for multicast structure\n");
844 set_bit(IPOIB_MCAST_FLAG_FOUND
, &nmcast
->flags
);
846 nmcast
->mcmember
.mgid
= mgid
;
849 /* Destroy the send only entry */
850 list_move_tail(&mcast
->list
, &remove_list
);
852 rb_replace_node(&mcast
->rb_node
,
854 &priv
->multicast_tree
);
856 __ipoib_mcast_add(dev
, nmcast
);
858 list_add_tail(&nmcast
->list
, &priv
->multicast_list
);
862 set_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
);
865 /* Remove all of the entries don't exist anymore */
866 list_for_each_entry_safe(mcast
, tmcast
, &priv
->multicast_list
, list
) {
867 if (!test_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
) &&
868 !test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
869 ipoib_dbg_mcast(priv
, "deleting multicast group %pI6\n",
870 mcast
->mcmember
.mgid
.raw
);
872 rb_erase(&mcast
->rb_node
, &priv
->multicast_tree
);
874 /* Move to the remove list */
875 list_move_tail(&mcast
->list
, &remove_list
);
879 spin_unlock(&priv
->lock
);
880 netif_addr_unlock(dev
);
881 local_irq_restore(flags
);
883 /* We have to cancel outside of the spinlock */
884 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
885 ipoib_mcast_leave(mcast
->dev
, mcast
);
886 ipoib_mcast_free(mcast
);
889 if (test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
890 ipoib_mcast_start_thread(dev
);
893 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
895 struct ipoib_mcast_iter
*ipoib_mcast_iter_init(struct net_device
*dev
)
897 struct ipoib_mcast_iter
*iter
;
899 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
904 memset(iter
->mgid
.raw
, 0, 16);
906 if (ipoib_mcast_iter_next(iter
)) {
914 int ipoib_mcast_iter_next(struct ipoib_mcast_iter
*iter
)
916 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
918 struct ipoib_mcast
*mcast
;
921 spin_lock_irq(&priv
->lock
);
923 n
= rb_first(&priv
->multicast_tree
);
926 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
928 if (memcmp(iter
->mgid
.raw
, mcast
->mcmember
.mgid
.raw
,
929 sizeof (union ib_gid
)) < 0) {
930 iter
->mgid
= mcast
->mcmember
.mgid
;
931 iter
->created
= mcast
->created
;
932 iter
->queuelen
= skb_queue_len(&mcast
->pkt_queue
);
933 iter
->complete
= !!mcast
->ah
;
934 iter
->send_only
= !!(mcast
->flags
& (1 << IPOIB_MCAST_FLAG_SENDONLY
));
944 spin_unlock_irq(&priv
->lock
);
949 void ipoib_mcast_iter_read(struct ipoib_mcast_iter
*iter
,
951 unsigned long *created
,
952 unsigned int *queuelen
,
953 unsigned int *complete
,
954 unsigned int *send_only
)
957 *created
= iter
->created
;
958 *queuelen
= iter
->queuelen
;
959 *complete
= iter
->complete
;
960 *send_only
= iter
->send_only
;
963 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */