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
;
72 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
73 struct ipoib_neigh
*neigh
, *tmp
;
76 ipoib_dbg_mcast(netdev_priv(dev
), "deleting multicast group %pI6\n",
77 mcast
->mcmember
.mgid
.raw
);
79 spin_lock_irq(&priv
->lock
);
81 list_for_each_entry_safe(neigh
, tmp
, &mcast
->neigh_list
, list
) {
83 * It's safe to call ipoib_put_ah() inside priv->lock
84 * here, because we know that mcast->ah will always
85 * hold one more reference, so ipoib_put_ah() will
86 * never do more than decrement the ref count.
89 ipoib_put_ah(neigh
->ah
);
90 ipoib_neigh_free(dev
, neigh
);
93 spin_unlock_irq(&priv
->lock
);
96 ipoib_put_ah(mcast
->ah
);
98 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
100 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
103 netif_tx_lock_bh(dev
);
104 dev
->stats
.tx_dropped
+= tx_dropped
;
105 netif_tx_unlock_bh(dev
);
110 static struct ipoib_mcast
*ipoib_mcast_alloc(struct net_device
*dev
,
113 struct ipoib_mcast
*mcast
;
115 mcast
= kzalloc(sizeof *mcast
, can_sleep
? GFP_KERNEL
: GFP_ATOMIC
);
120 mcast
->created
= jiffies
;
123 INIT_LIST_HEAD(&mcast
->list
);
124 INIT_LIST_HEAD(&mcast
->neigh_list
);
125 skb_queue_head_init(&mcast
->pkt_queue
);
130 static struct ipoib_mcast
*__ipoib_mcast_find(struct net_device
*dev
, void *mgid
)
132 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
133 struct rb_node
*n
= priv
->multicast_tree
.rb_node
;
136 struct ipoib_mcast
*mcast
;
139 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
141 ret
= memcmp(mgid
, mcast
->mcmember
.mgid
.raw
,
142 sizeof (union ib_gid
));
154 static int __ipoib_mcast_add(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
156 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
157 struct rb_node
**n
= &priv
->multicast_tree
.rb_node
, *pn
= NULL
;
160 struct ipoib_mcast
*tmcast
;
164 tmcast
= rb_entry(pn
, struct ipoib_mcast
, rb_node
);
166 ret
= memcmp(mcast
->mcmember
.mgid
.raw
, tmcast
->mcmember
.mgid
.raw
,
167 sizeof (union ib_gid
));
176 rb_link_node(&mcast
->rb_node
, pn
, n
);
177 rb_insert_color(&mcast
->rb_node
, &priv
->multicast_tree
);
182 static int ipoib_mcast_join_finish(struct ipoib_mcast
*mcast
,
183 struct ib_sa_mcmember_rec
*mcmember
)
185 struct net_device
*dev
= mcast
->dev
;
186 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
191 mcast
->mcmember
= *mcmember
;
193 /* Set the cached Q_Key before we attach if it's the broadcast group */
194 if (!memcmp(mcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
195 sizeof (union ib_gid
))) {
196 spin_lock_irq(&priv
->lock
);
197 if (!priv
->broadcast
) {
198 spin_unlock_irq(&priv
->lock
);
201 priv
->qkey
= be32_to_cpu(priv
->broadcast
->mcmember
.qkey
);
202 spin_unlock_irq(&priv
->lock
);
203 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 %pI6 already attached\n",
210 mcast
->mcmember
.mgid
.raw
);
215 ret
= ipoib_mcast_attach(dev
, be16_to_cpu(mcast
->mcmember
.mlid
),
216 &mcast
->mcmember
.mgid
, set_qkey
);
218 ipoib_warn(priv
, "couldn't attach QP to multicast group %pI6\n",
219 mcast
->mcmember
.mgid
.raw
);
221 clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
);
227 struct ib_ah_attr av
= {
228 .dlid
= be16_to_cpu(mcast
->mcmember
.mlid
),
229 .port_num
= priv
->port
,
230 .sl
= mcast
->mcmember
.sl
,
231 .ah_flags
= IB_AH_GRH
,
232 .static_rate
= mcast
->mcmember
.rate
,
234 .flow_label
= be32_to_cpu(mcast
->mcmember
.flow_label
),
235 .hop_limit
= mcast
->mcmember
.hop_limit
,
237 .traffic_class
= mcast
->mcmember
.traffic_class
240 av
.grh
.dgid
= mcast
->mcmember
.mgid
;
242 ah
= ipoib_create_ah(dev
, priv
->pd
, &av
);
244 ipoib_warn(priv
, "ib_address_create failed %ld\n",
246 /* use original error */
249 spin_lock_irq(&priv
->lock
);
251 spin_unlock_irq(&priv
->lock
);
253 ipoib_dbg_mcast(priv
, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n",
254 mcast
->mcmember
.mgid
.raw
,
256 be16_to_cpu(mcast
->mcmember
.mlid
),
261 /* actually send any queued packets */
262 netif_tx_lock_bh(dev
);
263 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
264 struct sk_buff
*skb
= skb_dequeue(&mcast
->pkt_queue
);
265 struct dst_entry
*dst
= skb_dst(skb
);
266 struct neighbour
*n
= NULL
;
268 netif_tx_unlock_bh(dev
);
272 n
= dst_get_neighbour_raw(dst
);
274 /* put pseudoheader back on for next time */
275 skb_push(skb
, sizeof (struct ipoib_pseudoheader
));
278 if (dev_queue_xmit(skb
))
279 ipoib_warn(priv
, "dev_queue_xmit failed to requeue packet\n");
280 netif_tx_lock_bh(dev
);
282 netif_tx_unlock_bh(dev
);
288 ipoib_mcast_sendonly_join_complete(int status
,
289 struct ib_sa_multicast
*multicast
)
291 struct ipoib_mcast
*mcast
= multicast
->context
;
292 struct net_device
*dev
= mcast
->dev
;
294 /* We trap for port events ourselves. */
295 if (status
== -ENETRESET
)
299 status
= ipoib_mcast_join_finish(mcast
, &multicast
->rec
);
302 if (mcast
->logcount
++ < 20)
303 ipoib_dbg_mcast(netdev_priv(dev
), "multicast join failed for %pI6, status %d\n",
304 mcast
->mcmember
.mgid
.raw
, status
);
306 /* Flush out any queued packets */
307 netif_tx_lock_bh(dev
);
308 while (!skb_queue_empty(&mcast
->pkt_queue
)) {
309 ++dev
->stats
.tx_dropped
;
310 dev_kfree_skb_any(skb_dequeue(&mcast
->pkt_queue
));
312 netif_tx_unlock_bh(dev
);
314 /* Clear the busy flag so we try again */
315 status
= test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
,
321 static int ipoib_mcast_sendonly_join(struct ipoib_mcast
*mcast
)
323 struct net_device
*dev
= mcast
->dev
;
324 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
325 struct ib_sa_mcmember_rec rec
= {
326 #if 0 /* Some SMs don't support send-only yet */
334 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
)) {
335 ipoib_dbg_mcast(priv
, "device shutting down, no multicast joins\n");
339 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
)) {
340 ipoib_dbg_mcast(priv
, "multicast entry busy, skipping\n");
344 rec
.mgid
= mcast
->mcmember
.mgid
;
345 rec
.port_gid
= priv
->local_gid
;
346 rec
.pkey
= cpu_to_be16(priv
->pkey
);
348 mcast
->mc
= ib_sa_join_multicast(&ipoib_sa_client
, priv
->ca
,
350 IB_SA_MCMEMBER_REC_MGID
|
351 IB_SA_MCMEMBER_REC_PORT_GID
|
352 IB_SA_MCMEMBER_REC_PKEY
|
353 IB_SA_MCMEMBER_REC_JOIN_STATE
,
355 ipoib_mcast_sendonly_join_complete
,
357 if (IS_ERR(mcast
->mc
)) {
358 ret
= PTR_ERR(mcast
->mc
);
359 clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
360 ipoib_warn(priv
, "ib_sa_join_multicast failed (ret = %d)\n",
363 ipoib_dbg_mcast(priv
, "no multicast record for %pI6, starting join\n",
364 mcast
->mcmember
.mgid
.raw
);
370 void ipoib_mcast_carrier_on_task(struct work_struct
*work
)
372 struct ipoib_dev_priv
*priv
= container_of(work
, struct ipoib_dev_priv
,
374 struct ib_port_attr attr
;
377 * Take rtnl_lock to avoid racing with ipoib_stop() and
378 * turning the carrier back on while a device is being
381 if (ib_query_port(priv
->ca
, priv
->port
, &attr
) ||
382 attr
.state
!= IB_PORT_ACTIVE
) {
383 ipoib_dbg(priv
, "Keeping carrier off until IB port is active\n");
388 netif_carrier_on(priv
->dev
);
392 static int ipoib_mcast_join_complete(int status
,
393 struct ib_sa_multicast
*multicast
)
395 struct ipoib_mcast
*mcast
= multicast
->context
;
396 struct net_device
*dev
= mcast
->dev
;
397 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
399 ipoib_dbg_mcast(priv
, "join completion for %pI6 (status %d)\n",
400 mcast
->mcmember
.mgid
.raw
, status
);
402 /* We trap for port events ourselves. */
403 if (status
== -ENETRESET
)
407 status
= ipoib_mcast_join_finish(mcast
, &multicast
->rec
);
411 mutex_lock(&mcast_mutex
);
412 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
413 queue_delayed_work(ipoib_workqueue
,
414 &priv
->mcast_task
, 0);
415 mutex_unlock(&mcast_mutex
);
418 * Defer carrier on work to ipoib_workqueue to avoid a
419 * deadlock on rtnl_lock here.
421 if (mcast
== priv
->broadcast
)
422 queue_work(ipoib_workqueue
, &priv
->carrier_on_task
);
427 if (mcast
->logcount
++ < 20) {
428 if (status
== -ETIMEDOUT
|| status
== -EAGAIN
) {
429 ipoib_dbg_mcast(priv
, "multicast join failed for %pI6, status %d\n",
430 mcast
->mcmember
.mgid
.raw
, status
);
432 ipoib_warn(priv
, "multicast join failed for %pI6, status %d\n",
433 mcast
->mcmember
.mgid
.raw
, status
);
438 if (mcast
->backoff
> IPOIB_MAX_BACKOFF_SECONDS
)
439 mcast
->backoff
= IPOIB_MAX_BACKOFF_SECONDS
;
441 /* Clear the busy flag so we try again */
442 status
= test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
444 mutex_lock(&mcast_mutex
);
445 spin_lock_irq(&priv
->lock
);
446 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
447 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
,
448 mcast
->backoff
* HZ
);
449 spin_unlock_irq(&priv
->lock
);
450 mutex_unlock(&mcast_mutex
);
455 static void ipoib_mcast_join(struct net_device
*dev
, struct ipoib_mcast
*mcast
,
458 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
459 struct ib_sa_mcmember_rec rec
= {
462 ib_sa_comp_mask comp_mask
;
465 ipoib_dbg_mcast(priv
, "joining MGID %pI6\n", mcast
->mcmember
.mgid
.raw
);
467 rec
.mgid
= mcast
->mcmember
.mgid
;
468 rec
.port_gid
= priv
->local_gid
;
469 rec
.pkey
= cpu_to_be16(priv
->pkey
);
472 IB_SA_MCMEMBER_REC_MGID
|
473 IB_SA_MCMEMBER_REC_PORT_GID
|
474 IB_SA_MCMEMBER_REC_PKEY
|
475 IB_SA_MCMEMBER_REC_JOIN_STATE
;
479 IB_SA_MCMEMBER_REC_QKEY
|
480 IB_SA_MCMEMBER_REC_MTU_SELECTOR
|
481 IB_SA_MCMEMBER_REC_MTU
|
482 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
|
483 IB_SA_MCMEMBER_REC_RATE_SELECTOR
|
484 IB_SA_MCMEMBER_REC_RATE
|
485 IB_SA_MCMEMBER_REC_SL
|
486 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
487 IB_SA_MCMEMBER_REC_HOP_LIMIT
;
489 rec
.qkey
= priv
->broadcast
->mcmember
.qkey
;
490 rec
.mtu_selector
= IB_SA_EQ
;
491 rec
.mtu
= priv
->broadcast
->mcmember
.mtu
;
492 rec
.traffic_class
= priv
->broadcast
->mcmember
.traffic_class
;
493 rec
.rate_selector
= IB_SA_EQ
;
494 rec
.rate
= priv
->broadcast
->mcmember
.rate
;
495 rec
.sl
= priv
->broadcast
->mcmember
.sl
;
496 rec
.flow_label
= priv
->broadcast
->mcmember
.flow_label
;
497 rec
.hop_limit
= priv
->broadcast
->mcmember
.hop_limit
;
500 set_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
501 mcast
->mc
= ib_sa_join_multicast(&ipoib_sa_client
, priv
->ca
, priv
->port
,
502 &rec
, comp_mask
, GFP_KERNEL
,
503 ipoib_mcast_join_complete
, mcast
);
504 if (IS_ERR(mcast
->mc
)) {
505 clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
);
506 ret
= PTR_ERR(mcast
->mc
);
507 ipoib_warn(priv
, "ib_sa_join_multicast failed, status %d\n", ret
);
510 if (mcast
->backoff
> IPOIB_MAX_BACKOFF_SECONDS
)
511 mcast
->backoff
= IPOIB_MAX_BACKOFF_SECONDS
;
513 mutex_lock(&mcast_mutex
);
514 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
515 queue_delayed_work(ipoib_workqueue
,
517 mcast
->backoff
* HZ
);
518 mutex_unlock(&mcast_mutex
);
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_query_gid() 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
;
542 ipoib_warn(priv
, "ib_query_port failed\n");
545 if (!priv
->broadcast
) {
546 struct ipoib_mcast
*broadcast
;
548 if (!test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
551 broadcast
= ipoib_mcast_alloc(dev
, 1);
553 ipoib_warn(priv
, "failed to allocate broadcast group\n");
554 mutex_lock(&mcast_mutex
);
555 if (test_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
556 queue_delayed_work(ipoib_workqueue
,
557 &priv
->mcast_task
, HZ
);
558 mutex_unlock(&mcast_mutex
);
562 spin_lock_irq(&priv
->lock
);
563 memcpy(broadcast
->mcmember
.mgid
.raw
, priv
->dev
->broadcast
+ 4,
564 sizeof (union ib_gid
));
565 priv
->broadcast
= broadcast
;
567 __ipoib_mcast_add(dev
, priv
->broadcast
);
568 spin_unlock_irq(&priv
->lock
);
571 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
572 if (!test_bit(IPOIB_MCAST_FLAG_BUSY
, &priv
->broadcast
->flags
))
573 ipoib_mcast_join(dev
, priv
->broadcast
, 0);
578 struct ipoib_mcast
*mcast
= NULL
;
580 spin_lock_irq(&priv
->lock
);
581 list_for_each_entry(mcast
, &priv
->multicast_list
, list
) {
582 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)
583 && !test_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
)
584 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
585 /* Found the next unjoined group */
589 spin_unlock_irq(&priv
->lock
);
591 if (&mcast
->list
== &priv
->multicast_list
) {
596 ipoib_mcast_join(dev
, mcast
, 1);
600 priv
->mcast_mtu
= IPOIB_UD_MTU(ib_mtu_enum_to_int(priv
->broadcast
->mcmember
.mtu
));
602 if (!ipoib_cm_admin_enabled(dev
)) {
604 dev_set_mtu(dev
, min(priv
->mcast_mtu
, priv
->admin_mtu
));
608 ipoib_dbg_mcast(priv
, "successfully joined all multicast groups\n");
610 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
613 int ipoib_mcast_start_thread(struct net_device
*dev
)
615 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
617 ipoib_dbg_mcast(priv
, "starting multicast thread\n");
619 mutex_lock(&mcast_mutex
);
620 if (!test_and_set_bit(IPOIB_MCAST_RUN
, &priv
->flags
))
621 queue_delayed_work(ipoib_workqueue
, &priv
->mcast_task
, 0);
622 mutex_unlock(&mcast_mutex
);
627 int ipoib_mcast_stop_thread(struct net_device
*dev
, int flush
)
629 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
631 ipoib_dbg_mcast(priv
, "stopping multicast thread\n");
633 mutex_lock(&mcast_mutex
);
634 clear_bit(IPOIB_MCAST_RUN
, &priv
->flags
);
635 cancel_delayed_work(&priv
->mcast_task
);
636 mutex_unlock(&mcast_mutex
);
639 flush_workqueue(ipoib_workqueue
);
644 static int ipoib_mcast_leave(struct net_device
*dev
, struct ipoib_mcast
*mcast
)
646 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
649 if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
))
650 ib_sa_free_multicast(mcast
->mc
);
652 if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED
, &mcast
->flags
)) {
653 ipoib_dbg_mcast(priv
, "leaving MGID %pI6\n",
654 mcast
->mcmember
.mgid
.raw
);
656 /* Remove ourselves from the multicast group */
657 ret
= ib_detach_mcast(priv
->qp
, &mcast
->mcmember
.mgid
,
658 be16_to_cpu(mcast
->mcmember
.mlid
));
660 ipoib_warn(priv
, "ib_detach_mcast failed (result = %d)\n", ret
);
666 void ipoib_mcast_send(struct net_device
*dev
, void *mgid
, struct sk_buff
*skb
)
668 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
669 struct ipoib_mcast
*mcast
;
672 spin_lock_irqsave(&priv
->lock
, flags
);
674 if (!test_bit(IPOIB_FLAG_OPER_UP
, &priv
->flags
) ||
676 !test_bit(IPOIB_MCAST_FLAG_ATTACHED
, &priv
->broadcast
->flags
)) {
677 ++dev
->stats
.tx_dropped
;
678 dev_kfree_skb_any(skb
);
682 mcast
= __ipoib_mcast_find(dev
, mgid
);
684 /* Let's create a new send only group now */
685 ipoib_dbg_mcast(priv
, "setting up send only multicast group for %pI6\n",
688 mcast
= ipoib_mcast_alloc(dev
, 0);
690 ipoib_warn(priv
, "unable to allocate memory for "
691 "multicast structure\n");
692 ++dev
->stats
.tx_dropped
;
693 dev_kfree_skb_any(skb
);
697 set_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
);
698 memcpy(mcast
->mcmember
.mgid
.raw
, mgid
, sizeof (union ib_gid
));
699 __ipoib_mcast_add(dev
, mcast
);
700 list_add_tail(&mcast
->list
, &priv
->multicast_list
);
704 if (skb_queue_len(&mcast
->pkt_queue
) < IPOIB_MAX_MCAST_QUEUE
)
705 skb_queue_tail(&mcast
->pkt_queue
, skb
);
707 ++dev
->stats
.tx_dropped
;
708 dev_kfree_skb_any(skb
);
711 if (test_bit(IPOIB_MCAST_FLAG_BUSY
, &mcast
->flags
))
712 ipoib_dbg_mcast(priv
, "no address vector, "
713 "but multicast join already started\n");
714 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
))
715 ipoib_mcast_sendonly_join(mcast
);
718 * If lookup completes between here and out:, don't
719 * want to send packet twice.
725 if (mcast
&& mcast
->ah
) {
726 struct dst_entry
*dst
= skb_dst(skb
);
727 struct neighbour
*n
= NULL
;
731 n
= dst_get_neighbour(dst
);
732 if (n
&& !*to_ipoib_neigh(n
)) {
733 struct ipoib_neigh
*neigh
= ipoib_neigh_alloc(n
,
737 kref_get(&mcast
->ah
->ref
);
738 neigh
->ah
= mcast
->ah
;
739 list_add_tail(&neigh
->list
, &mcast
->neigh_list
);
743 spin_unlock_irqrestore(&priv
->lock
, flags
);
744 ipoib_send(dev
, skb
, mcast
->ah
, IB_MULTICAST_QPN
);
749 spin_unlock_irqrestore(&priv
->lock
, flags
);
752 void ipoib_mcast_dev_flush(struct net_device
*dev
)
754 struct ipoib_dev_priv
*priv
= netdev_priv(dev
);
755 LIST_HEAD(remove_list
);
756 struct ipoib_mcast
*mcast
, *tmcast
;
759 ipoib_dbg_mcast(priv
, "flushing multicast list\n");
761 spin_lock_irqsave(&priv
->lock
, flags
);
763 list_for_each_entry_safe(mcast
, tmcast
, &priv
->multicast_list
, list
) {
764 list_del(&mcast
->list
);
765 rb_erase(&mcast
->rb_node
, &priv
->multicast_tree
);
766 list_add_tail(&mcast
->list
, &remove_list
);
769 if (priv
->broadcast
) {
770 rb_erase(&priv
->broadcast
->rb_node
, &priv
->multicast_tree
);
771 list_add_tail(&priv
->broadcast
->list
, &remove_list
);
772 priv
->broadcast
= NULL
;
775 spin_unlock_irqrestore(&priv
->lock
, flags
);
777 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
778 ipoib_mcast_leave(dev
, mcast
);
779 ipoib_mcast_free(mcast
);
783 static int ipoib_mcast_addr_is_valid(const u8
*addr
, const u8
*broadcast
)
785 /* reserved QPN, prefix, scope */
786 if (memcmp(addr
, broadcast
, 6))
788 /* signature lower, pkey */
789 if (memcmp(addr
+ 7, broadcast
+ 7, 3))
794 void ipoib_mcast_restart_task(struct work_struct
*work
)
796 struct ipoib_dev_priv
*priv
=
797 container_of(work
, struct ipoib_dev_priv
, restart_task
);
798 struct net_device
*dev
= priv
->dev
;
799 struct netdev_hw_addr
*ha
;
800 struct ipoib_mcast
*mcast
, *tmcast
;
801 LIST_HEAD(remove_list
);
803 struct ib_sa_mcmember_rec rec
;
805 ipoib_dbg_mcast(priv
, "restarting multicast task\n");
807 ipoib_mcast_stop_thread(dev
, 0);
809 local_irq_save(flags
);
810 netif_addr_lock(dev
);
811 spin_lock(&priv
->lock
);
814 * Unfortunately, the networking core only gives us a list of all of
815 * the multicast hardware addresses. We need to figure out which ones
816 * are new and which ones have been removed
819 /* Clear out the found flag */
820 list_for_each_entry(mcast
, &priv
->multicast_list
, list
)
821 clear_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
);
823 /* Mark all of the entries that are found or don't exist */
824 netdev_for_each_mc_addr(ha
, dev
) {
827 if (!ipoib_mcast_addr_is_valid(ha
->addr
, dev
->broadcast
))
830 memcpy(mgid
.raw
, ha
->addr
+ 4, sizeof mgid
);
832 mcast
= __ipoib_mcast_find(dev
, &mgid
);
833 if (!mcast
|| test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
834 struct ipoib_mcast
*nmcast
;
836 /* ignore group which is directly joined by userspace */
837 if (test_bit(IPOIB_FLAG_UMCAST
, &priv
->flags
) &&
838 !ib_sa_get_mcmember_rec(priv
->ca
, priv
->port
, &mgid
, &rec
)) {
839 ipoib_dbg_mcast(priv
, "ignoring multicast entry for mgid %pI6\n",
844 /* Not found or send-only group, let's add a new entry */
845 ipoib_dbg_mcast(priv
, "adding multicast entry for mgid %pI6\n",
848 nmcast
= ipoib_mcast_alloc(dev
, 0);
850 ipoib_warn(priv
, "unable to allocate memory for multicast structure\n");
854 set_bit(IPOIB_MCAST_FLAG_FOUND
, &nmcast
->flags
);
856 nmcast
->mcmember
.mgid
= mgid
;
859 /* Destroy the send only entry */
860 list_move_tail(&mcast
->list
, &remove_list
);
862 rb_replace_node(&mcast
->rb_node
,
864 &priv
->multicast_tree
);
866 __ipoib_mcast_add(dev
, nmcast
);
868 list_add_tail(&nmcast
->list
, &priv
->multicast_list
);
872 set_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
);
875 /* Remove all of the entries don't exist anymore */
876 list_for_each_entry_safe(mcast
, tmcast
, &priv
->multicast_list
, list
) {
877 if (!test_bit(IPOIB_MCAST_FLAG_FOUND
, &mcast
->flags
) &&
878 !test_bit(IPOIB_MCAST_FLAG_SENDONLY
, &mcast
->flags
)) {
879 ipoib_dbg_mcast(priv
, "deleting multicast group %pI6\n",
880 mcast
->mcmember
.mgid
.raw
);
882 rb_erase(&mcast
->rb_node
, &priv
->multicast_tree
);
884 /* Move to the remove list */
885 list_move_tail(&mcast
->list
, &remove_list
);
889 spin_unlock(&priv
->lock
);
890 netif_addr_unlock(dev
);
891 local_irq_restore(flags
);
893 /* We have to cancel outside of the spinlock */
894 list_for_each_entry_safe(mcast
, tmcast
, &remove_list
, list
) {
895 ipoib_mcast_leave(mcast
->dev
, mcast
);
896 ipoib_mcast_free(mcast
);
899 if (test_bit(IPOIB_FLAG_ADMIN_UP
, &priv
->flags
))
900 ipoib_mcast_start_thread(dev
);
903 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
905 struct ipoib_mcast_iter
*ipoib_mcast_iter_init(struct net_device
*dev
)
907 struct ipoib_mcast_iter
*iter
;
909 iter
= kmalloc(sizeof *iter
, GFP_KERNEL
);
914 memset(iter
->mgid
.raw
, 0, 16);
916 if (ipoib_mcast_iter_next(iter
)) {
924 int ipoib_mcast_iter_next(struct ipoib_mcast_iter
*iter
)
926 struct ipoib_dev_priv
*priv
= netdev_priv(iter
->dev
);
928 struct ipoib_mcast
*mcast
;
931 spin_lock_irq(&priv
->lock
);
933 n
= rb_first(&priv
->multicast_tree
);
936 mcast
= rb_entry(n
, struct ipoib_mcast
, rb_node
);
938 if (memcmp(iter
->mgid
.raw
, mcast
->mcmember
.mgid
.raw
,
939 sizeof (union ib_gid
)) < 0) {
940 iter
->mgid
= mcast
->mcmember
.mgid
;
941 iter
->created
= mcast
->created
;
942 iter
->queuelen
= skb_queue_len(&mcast
->pkt_queue
);
943 iter
->complete
= !!mcast
->ah
;
944 iter
->send_only
= !!(mcast
->flags
& (1 << IPOIB_MCAST_FLAG_SENDONLY
));
954 spin_unlock_irq(&priv
->lock
);
959 void ipoib_mcast_iter_read(struct ipoib_mcast_iter
*iter
,
961 unsigned long *created
,
962 unsigned int *queuelen
,
963 unsigned int *complete
,
964 unsigned int *send_only
)
967 *created
= iter
->created
;
968 *queuelen
= iter
->queuelen
;
969 *complete
= iter
->complete
;
970 *send_only
= iter
->send_only
;
973 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */