1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
6 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
7 *
8 * This software is available to you under a choice of one of two
9 * licenses. You may choose to be licensed under the terms of the GNU
10 * General Public License (GPL) Version 2, available from the file
11 * COPYING in the main directory of this source tree, or the
12 * OpenIB.org BSD license below:
13 *
14 * Redistribution and use in source and binary forms, with or
15 * without modification, are permitted provided that the following
16 * conditions are met:
17 *
18 * - Redistributions of source code must retain the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer.
21 *
22 * - Redistributions in binary form must reproduce the above
23 * copyright notice, this list of conditions and the following
24 * disclaimer in the documentation and/or other materials
25 * provided with the distribution.
26 *
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 * SOFTWARE.
35 */
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39
40 #include "ipoib.h"
41
42 #include <linux/delay.h>
43 #include <linux/completion.h>
44
45 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
46 static int mcast_debug_level = 1;
47
48 module_param(mcast_debug_level, int, 0644);
49 MODULE_PARM_DESC(mcast_debug_level,
50 "Enable multicast debug tracing if > 0");
51 #endif
52
53 static DEFINE_MUTEX(mcast_mutex);
54
55 struct ipoib_mcast_iter {
56 struct ipoib_dev_priv *priv;
57 union ib_gid mgid;
58 unsigned long created;
59 unsigned int queuelen;
60 unsigned int complete;
61 unsigned int send_only;
62 };
63
ipoib_mcast_free(struct ipoib_mcast * mcast)64 static void ipoib_mcast_free(struct ipoib_mcast *mcast)
65 {
66 struct ifnet *dev = mcast->priv->dev;
67 int tx_dropped = 0;
68
69 ipoib_dbg_mcast(mcast->priv, "deleting multicast group %16D\n",
70 mcast->mcmember.mgid.raw, ":");
71
72 if (mcast->ah)
73 ipoib_put_ah(mcast->ah);
74
75 tx_dropped = mcast->pkt_queue.ifq_len;
76 _IF_DRAIN(&mcast->pkt_queue); /* XXX Locking. */
77
78 if_inc_counter(dev, IFCOUNTER_OERRORS, tx_dropped);
79
80 kfree(mcast);
81 }
82
ipoib_mcast_alloc(struct ipoib_dev_priv * priv,int can_sleep)83 static struct ipoib_mcast *ipoib_mcast_alloc(struct ipoib_dev_priv *priv,
84 int can_sleep)
85 {
86 struct ipoib_mcast *mcast;
87
88 mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
89 if (!mcast)
90 return NULL;
91
92 mcast->priv = priv;
93 mcast->created = jiffies;
94 mcast->backoff = 1;
95
96 INIT_LIST_HEAD(&mcast->list);
97 bzero(&mcast->pkt_queue, sizeof(mcast->pkt_queue));
98
99 return mcast;
100 }
101
__ipoib_mcast_find(struct ipoib_dev_priv * priv,void * mgid)102 static struct ipoib_mcast *__ipoib_mcast_find(struct ipoib_dev_priv *priv,
103 void *mgid)
104 {
105 struct rb_node *n = priv->multicast_tree.rb_node;
106
107 while (n) {
108 struct ipoib_mcast *mcast;
109 int ret;
110
111 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
112
113 ret = memcmp(mgid, mcast->mcmember.mgid.raw,
114 sizeof (union ib_gid));
115 if (ret < 0)
116 n = n->rb_left;
117 else if (ret > 0)
118 n = n->rb_right;
119 else
120 return mcast;
121 }
122
123 return NULL;
124 }
125
__ipoib_mcast_add(struct ipoib_dev_priv * priv,struct ipoib_mcast * mcast)126 static int __ipoib_mcast_add(struct ipoib_dev_priv *priv,
127 struct ipoib_mcast *mcast)
128 {
129 struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL;
130
131 while (*n) {
132 struct ipoib_mcast *tmcast;
133 int ret;
134
135 pn = *n;
136 tmcast = rb_entry(pn, struct ipoib_mcast, rb_node);
137
138 ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw,
139 sizeof (union ib_gid));
140 if (ret < 0)
141 n = &pn->rb_left;
142 else if (ret > 0)
143 n = &pn->rb_right;
144 else
145 return -EEXIST;
146 }
147
148 rb_link_node(&mcast->rb_node, pn, n);
149 rb_insert_color(&mcast->rb_node, &priv->multicast_tree);
150
151 return 0;
152 }
153
ipoib_mcast_join_finish(struct ipoib_mcast * mcast,struct ib_sa_mcmember_rec * mcmember)154 static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
155 struct ib_sa_mcmember_rec *mcmember)
156 {
157 struct ipoib_dev_priv *priv = mcast->priv;
158 struct ifnet *dev = priv->dev;
159 struct ipoib_ah *ah;
160 int ret;
161 int set_qkey = 0;
162
163 mcast->mcmember = *mcmember;
164
165 /* Set the cached Q_Key before we attach if it's the broadcast group */
166 if (!memcmp(mcast->mcmember.mgid.raw, dev->if_broadcastaddr + 4,
167 sizeof (union ib_gid))) {
168 spin_lock_irq(&priv->lock);
169 if (!priv->broadcast) {
170 spin_unlock_irq(&priv->lock);
171 return -EAGAIN;
172 }
173 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey);
174 spin_unlock_irq(&priv->lock);
175 priv->tx_wr.remote_qkey = priv->qkey;
176 set_qkey = 1;
177 }
178
179 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
180 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
181 ipoib_warn(priv, "multicast group %16D already attached\n",
182 mcast->mcmember.mgid.raw, ":");
183
184 return 0;
185 }
186
187 ret = ipoib_mcast_attach(priv, be16_to_cpu(mcast->mcmember.mlid),
188 &mcast->mcmember.mgid, set_qkey);
189 if (ret < 0) {
190 ipoib_warn(priv, "couldn't attach QP to multicast group %16D\n",
191 mcast->mcmember.mgid.raw, ":");
192
193 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags);
194 return ret;
195 }
196 }
197
198 {
199 struct ib_ah_attr av = {
200 .dlid = be16_to_cpu(mcast->mcmember.mlid),
201 .port_num = priv->port,
202 .sl = mcast->mcmember.sl,
203 .ah_flags = IB_AH_GRH,
204 .static_rate = mcast->mcmember.rate,
205 .grh = {
206 .flow_label = be32_to_cpu(mcast->mcmember.flow_label),
207 .hop_limit = mcast->mcmember.hop_limit,
208 .sgid_index = 0,
209 .traffic_class = mcast->mcmember.traffic_class
210 }
211 };
212 av.grh.dgid = mcast->mcmember.mgid;
213
214 ah = ipoib_create_ah(priv, priv->pd, &av);
215 if (!ah) {
216 ipoib_warn(priv, "ib_address_create failed\n");
217 } else {
218 spin_lock_irq(&priv->lock);
219 mcast->ah = ah;
220 spin_unlock_irq(&priv->lock);
221
222 ipoib_dbg_mcast(priv, "MGID %16D AV %p, LID 0x%04x, SL %d\n",
223 mcast->mcmember.mgid.raw, ":",
224 mcast->ah->ah,
225 be16_to_cpu(mcast->mcmember.mlid),
226 mcast->mcmember.sl);
227 }
228 }
229
230 /* actually send any queued packets */
231 while (mcast->pkt_queue.ifq_len) {
232 struct mbuf *mb;
233 _IF_DEQUEUE(&mcast->pkt_queue, mb);
234 mb->m_pkthdr.rcvif = dev;
235
236 if (dev->if_transmit(dev, mb))
237 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
238 }
239
240 return 0;
241 }
242
243 static int
ipoib_mcast_sendonly_join_complete(int status,struct ib_sa_multicast * multicast)244 ipoib_mcast_sendonly_join_complete(int status,
245 struct ib_sa_multicast *multicast)
246 {
247 struct ipoib_mcast *mcast = multicast->context;
248 struct ipoib_dev_priv *priv = mcast->priv;
249
250 /* We trap for port events ourselves. */
251 if (status == -ENETRESET)
252 return 0;
253
254 if (!status)
255 status = ipoib_mcast_join_finish(mcast, &multicast->rec);
256
257 if (status) {
258 if (mcast->logcount++ < 20)
259 ipoib_dbg_mcast(priv, "multicast join failed for %16D, status %d\n",
260 mcast->mcmember.mgid.raw, ":", status);
261
262 /* Flush out any queued packets */
263 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, mcast->pkt_queue.ifq_len);
264 _IF_DRAIN(&mcast->pkt_queue);
265
266 /* Clear the busy flag so we try again */
267 status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY,
268 &mcast->flags);
269 }
270 return status;
271 }
272
ipoib_mcast_sendonly_join(struct ipoib_mcast * mcast)273 static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
274 {
275 struct ipoib_dev_priv *priv = mcast->priv;
276 struct ib_sa_mcmember_rec rec = {
277 #if 0 /* Some SMs don't support send-only yet */
278 .join_state = 4
279 #else
280 .join_state = 1
281 #endif
282 };
283 int ret = 0;
284
285 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
286 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n");
287 return -ENODEV;
288 }
289
290 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
291 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
292 return -EBUSY;
293 }
294
295 rec.mgid = mcast->mcmember.mgid;
296 rec.port_gid = priv->local_gid;
297 rec.pkey = cpu_to_be16(priv->pkey);
298
299 mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca,
300 priv->port, &rec,
301 IB_SA_MCMEMBER_REC_MGID |
302 IB_SA_MCMEMBER_REC_PORT_GID |
303 IB_SA_MCMEMBER_REC_PKEY |
304 IB_SA_MCMEMBER_REC_JOIN_STATE,
305 GFP_ATOMIC,
306 ipoib_mcast_sendonly_join_complete,
307 mcast);
308 if (IS_ERR(mcast->mc)) {
309 ret = PTR_ERR(mcast->mc);
310 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
311 ipoib_warn(priv, "ib_sa_join_multicast failed (ret = %d)\n",
312 ret);
313 } else {
314 ipoib_dbg_mcast(priv, "no multicast record for %16D, starting join\n",
315 mcast->mcmember.mgid.raw, ":");
316 }
317
318 return ret;
319 }
320
ipoib_mcast_carrier_on_task(struct work_struct * work)321 void ipoib_mcast_carrier_on_task(struct work_struct *work)
322 {
323 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv,
324 carrier_on_task);
325 struct ib_port_attr attr;
326
327 /*
328 * Take rtnl_lock to avoid racing with ipoib_stop() and
329 * turning the carrier back on while a device is being
330 * removed.
331 */
332 if (ib_query_port(priv->ca, priv->port, &attr) ||
333 attr.state != IB_PORT_ACTIVE) {
334 ipoib_dbg(priv, "Keeping carrier off until IB port is active\n");
335 return;
336 }
337 if_link_state_change(priv->dev, LINK_STATE_UP);
338 }
339
ipoib_mcast_join_complete(int status,struct ib_sa_multicast * multicast)340 static int ipoib_mcast_join_complete(int status,
341 struct ib_sa_multicast *multicast)
342 {
343 struct ipoib_mcast *mcast = multicast->context;
344 struct ipoib_dev_priv *priv = mcast->priv;
345
346 ipoib_dbg_mcast(priv, "join completion for %16D (status %d)\n",
347 mcast->mcmember.mgid.raw, ":", status);
348
349 /* We trap for port events ourselves. */
350 if (status == -ENETRESET)
351 return 0;
352
353 if (!status)
354 status = ipoib_mcast_join_finish(mcast, &multicast->rec);
355
356 if (!status) {
357 mcast->backoff = 1;
358 mutex_lock(&mcast_mutex);
359 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
360 queue_delayed_work(ipoib_workqueue,
361 &priv->mcast_task, 0);
362 mutex_unlock(&mcast_mutex);
363
364 /*
365 * Defer carrier on work to ipoib_workqueue to avoid a
366 * deadlock on rtnl_lock here.
367 */
368 if (mcast == priv->broadcast)
369 queue_work(ipoib_workqueue, &priv->carrier_on_task);
370
371 return 0;
372 }
373
374 if (mcast->logcount++ < 20) {
375 if (status == -ETIMEDOUT || status == -EAGAIN) {
376 ipoib_dbg_mcast(priv, "multicast join failed for %16D, status %d\n",
377 mcast->mcmember.mgid.raw, ":", status);
378 } else {
379 ipoib_warn(priv, "multicast join failed for %16D, status %d\n",
380 mcast->mcmember.mgid.raw, ":", status);
381 }
382 }
383
384 mcast->backoff *= 2;
385 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
386 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
387
388 /* Clear the busy flag so we try again */
389 status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
390
391 mutex_lock(&mcast_mutex);
392 spin_lock_irq(&priv->lock);
393 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
394 queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
395 mcast->backoff * HZ);
396 spin_unlock_irq(&priv->lock);
397 mutex_unlock(&mcast_mutex);
398
399 return status;
400 }
401
ipoib_mcast_join(struct ipoib_dev_priv * priv,struct ipoib_mcast * mcast,int create)402 static void ipoib_mcast_join(struct ipoib_dev_priv *priv,
403 struct ipoib_mcast *mcast, int create)
404 {
405 struct ib_sa_mcmember_rec rec = {
406 .join_state = 1
407 };
408 ib_sa_comp_mask comp_mask;
409 int ret = 0;
410
411 ipoib_dbg_mcast(priv, "joining MGID %16D\n",
412 mcast->mcmember.mgid.raw, ":");
413
414 rec.mgid = mcast->mcmember.mgid;
415 rec.port_gid = priv->local_gid;
416 rec.pkey = cpu_to_be16(priv->pkey);
417
418 comp_mask =
419 IB_SA_MCMEMBER_REC_MGID |
420 IB_SA_MCMEMBER_REC_PORT_GID |
421 IB_SA_MCMEMBER_REC_PKEY |
422 IB_SA_MCMEMBER_REC_JOIN_STATE;
423
424 if (create) {
425 comp_mask |=
426 IB_SA_MCMEMBER_REC_QKEY |
427 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
428 IB_SA_MCMEMBER_REC_MTU |
429 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS |
430 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
431 IB_SA_MCMEMBER_REC_RATE |
432 IB_SA_MCMEMBER_REC_SL |
433 IB_SA_MCMEMBER_REC_FLOW_LABEL |
434 IB_SA_MCMEMBER_REC_HOP_LIMIT;
435
436 rec.qkey = priv->broadcast->mcmember.qkey;
437 rec.mtu_selector = IB_SA_EQ;
438 rec.mtu = priv->broadcast->mcmember.mtu;
439 rec.traffic_class = priv->broadcast->mcmember.traffic_class;
440 rec.rate_selector = IB_SA_EQ;
441 rec.rate = priv->broadcast->mcmember.rate;
442 rec.sl = priv->broadcast->mcmember.sl;
443 rec.flow_label = priv->broadcast->mcmember.flow_label;
444 rec.hop_limit = priv->broadcast->mcmember.hop_limit;
445 }
446
447 set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
448 mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port,
449 &rec, comp_mask, GFP_KERNEL,
450 ipoib_mcast_join_complete, mcast);
451 if (IS_ERR(mcast->mc)) {
452 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
453 ret = PTR_ERR(mcast->mc);
454 ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret);
455
456 mcast->backoff *= 2;
457 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
458 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
459
460 mutex_lock(&mcast_mutex);
461 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
462 queue_delayed_work(ipoib_workqueue,
463 &priv->mcast_task,
464 mcast->backoff * HZ);
465 mutex_unlock(&mcast_mutex);
466 }
467 }
468
ipoib_mcast_join_task(struct work_struct * work)469 void ipoib_mcast_join_task(struct work_struct *work)
470 {
471 struct ipoib_dev_priv *priv =
472 container_of(work, struct ipoib_dev_priv, mcast_task.work);
473 struct ifnet *dev = priv->dev;
474 struct ib_port_attr attr;
475
476 ipoib_dbg_mcast(priv, "Running join task. flags 0x%lX\n", priv->flags);
477
478 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
479 return;
480
481 if (ib_query_port(priv->ca, priv->port, &attr) ||
482 attr.state != IB_PORT_ACTIVE) {
483 ipoib_dbg(priv, "%s: port state is not ACTIVE (state = %d) suspend task.\n",
484 __func__, attr.state);
485 return;
486 }
487
488 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid, NULL))
489 ipoib_warn(priv, "ib_query_gid() failed\n");
490 else
491 memcpy(IF_LLADDR(dev) + 4, priv->local_gid.raw, sizeof (union ib_gid));
492
493 {
494 struct ib_port_attr attr;
495
496 if (!ib_query_port(priv->ca, priv->port, &attr))
497 priv->local_lid = attr.lid;
498 else
499 ipoib_warn(priv, "ib_query_port failed\n");
500 }
501
502 if (!priv->broadcast) {
503 struct ipoib_mcast *broadcast;
504
505 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
506 return;
507
508 broadcast = ipoib_mcast_alloc(priv, 1);
509 if (!broadcast) {
510 ipoib_warn(priv, "failed to allocate broadcast group\n");
511 mutex_lock(&mcast_mutex);
512 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
513 queue_delayed_work(ipoib_workqueue,
514 &priv->mcast_task, HZ);
515 mutex_unlock(&mcast_mutex);
516 return;
517 }
518
519 spin_lock_irq(&priv->lock);
520 memcpy(broadcast->mcmember.mgid.raw, dev->if_broadcastaddr + 4,
521 sizeof (union ib_gid));
522 priv->broadcast = broadcast;
523
524 __ipoib_mcast_add(priv, priv->broadcast);
525 spin_unlock_irq(&priv->lock);
526 }
527
528 if (priv->broadcast &&
529 !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
530 if (priv->broadcast &&
531 !test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags))
532 ipoib_mcast_join(priv, priv->broadcast, 0);
533 return;
534 }
535
536 while (1) {
537 struct ipoib_mcast *mcast = NULL;
538
539 spin_lock_irq(&priv->lock);
540 list_for_each_entry(mcast, &priv->multicast_list, list) {
541 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)
542 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)
543 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
544 /* Found the next unjoined group */
545 break;
546 }
547 }
548 spin_unlock_irq(&priv->lock);
549
550 if (&mcast->list == &priv->multicast_list) {
551 /* All done */
552 break;
553 }
554
555 ipoib_mcast_join(priv, mcast, 1);
556 return;
557 }
558
559 spin_lock_irq(&priv->lock);
560 if (priv->broadcast)
561 priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu));
562 else
563 priv->mcast_mtu = priv->admin_mtu;
564 spin_unlock_irq(&priv->lock);
565
566 if (!ipoib_cm_admin_enabled(priv))
567 ipoib_change_mtu(priv, min(priv->mcast_mtu, priv->admin_mtu),
568 true);
569
570 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");
571
572 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
573 }
574
ipoib_mcast_start_thread(struct ipoib_dev_priv * priv)575 int ipoib_mcast_start_thread(struct ipoib_dev_priv *priv)
576 {
577 ipoib_dbg_mcast(priv, "starting multicast thread flags 0x%lX\n",
578 priv->flags);
579
580 mutex_lock(&mcast_mutex);
581 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
582 queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0);
583 mutex_unlock(&mcast_mutex);
584
585 return 0;
586 }
587
ipoib_mcast_stop_thread(struct ipoib_dev_priv * priv,int flush)588 int ipoib_mcast_stop_thread(struct ipoib_dev_priv *priv, int flush)
589 {
590
591 ipoib_dbg_mcast(priv, "stopping multicast thread\n");
592
593 mutex_lock(&mcast_mutex);
594 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
595 cancel_delayed_work(&priv->mcast_task);
596 mutex_unlock(&mcast_mutex);
597
598 if (flush)
599 flush_workqueue(ipoib_workqueue);
600
601 return 0;
602 }
603
ipoib_mcast_leave(struct ipoib_dev_priv * priv,struct ipoib_mcast * mcast)604 static int ipoib_mcast_leave(struct ipoib_dev_priv *priv, struct ipoib_mcast *mcast)
605 {
606 int ret = 0;
607
608 if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
609 ib_sa_free_multicast(mcast->mc);
610
611 if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
612 ipoib_dbg_mcast(priv, "leaving MGID %16D\n",
613 mcast->mcmember.mgid.raw, ":");
614
615 /* Remove ourselves from the multicast group */
616 ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid,
617 be16_to_cpu(mcast->mcmember.mlid));
618 if (ret)
619 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
620 }
621
622 return 0;
623 }
624
625 void
ipoib_mcast_send(struct ipoib_dev_priv * priv,void * mgid,struct mbuf * mb)626 ipoib_mcast_send(struct ipoib_dev_priv *priv, void *mgid, struct mbuf *mb)
627 {
628 struct ifnet *dev = priv->dev;
629 struct ipoib_mcast *mcast;
630
631 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) ||
632 !priv->broadcast ||
633 !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
634 if_inc_counter(dev, IFCOUNTER_OERRORS, 1);
635 m_freem(mb);
636 return;
637 }
638
639 mcast = __ipoib_mcast_find(priv, mgid);
640 if (!mcast) {
641 /* Let's create a new send only group now */
642 ipoib_dbg_mcast(priv, "setting up send only multicast group for %16D\n",
643 mgid, ":");
644
645 mcast = ipoib_mcast_alloc(priv, 0);
646 if (!mcast) {
647 ipoib_warn(priv, "unable to allocate memory for "
648 "multicast structure\n");
649 if_inc_counter(dev, IFCOUNTER_OERRORS, 1);
650 m_freem(mb);
651 goto out;
652 }
653
654 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
655 memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid));
656 __ipoib_mcast_add(priv, mcast);
657 list_add_tail(&mcast->list, &priv->multicast_list);
658 }
659
660 if (!mcast->ah) {
661 if (mcast->pkt_queue.ifq_len < IPOIB_MAX_MCAST_QUEUE) {
662 _IF_ENQUEUE(&mcast->pkt_queue, mb);
663 } else {
664 if_inc_counter(dev, IFCOUNTER_OERRORS, 1);
665 m_freem(mb);
666 }
667
668 if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
669 ipoib_dbg_mcast(priv, "no address vector, "
670 "but multicast join already started\n");
671 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
672 ipoib_mcast_sendonly_join(mcast);
673
674 /*
675 * If lookup completes between here and out:, don't
676 * want to send packet twice.
677 */
678 mcast = NULL;
679 }
680
681 out:
682 if (mcast && mcast->ah)
683 ipoib_send(priv, mb, mcast->ah, IB_MULTICAST_QPN);
684 }
685
ipoib_mcast_dev_flush(struct ipoib_dev_priv * priv)686 void ipoib_mcast_dev_flush(struct ipoib_dev_priv *priv)
687 {
688 LIST_HEAD(remove_list);
689 struct ipoib_mcast *mcast, *tmcast;
690 unsigned long flags;
691
692 ipoib_dbg_mcast(priv, "flushing multicast list\n");
693
694 spin_lock_irqsave(&priv->lock, flags);
695
696 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
697 list_del(&mcast->list);
698 rb_erase(&mcast->rb_node, &priv->multicast_tree);
699 list_add_tail(&mcast->list, &remove_list);
700 }
701
702 if (priv->broadcast) {
703 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
704 list_add_tail(&priv->broadcast->list, &remove_list);
705 priv->broadcast = NULL;
706 }
707
708 spin_unlock_irqrestore(&priv->lock, flags);
709
710 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
711 ipoib_mcast_leave(priv, mcast);
712 ipoib_mcast_free(mcast);
713 }
714 }
715
ipoib_mcast_addr_is_valid(const u8 * addr,unsigned int addrlen,const u8 * broadcast)716 static int ipoib_mcast_addr_is_valid(const u8 *addr, unsigned int addrlen,
717 const u8 *broadcast)
718 {
719 if (addrlen != INFINIBAND_ALEN)
720 return 0;
721 /* reserved QPN, prefix, scope */
722 if (memcmp(addr, broadcast, 6))
723 return 0;
724 /* signature lower, pkey */
725 if (memcmp(addr + 7, broadcast + 7, 3))
726 return 0;
727 return 1;
728 }
729
ipoib_mcast_restart_task(struct work_struct * work)730 void ipoib_mcast_restart_task(struct work_struct *work)
731 {
732 struct ipoib_dev_priv *priv =
733 container_of(work, struct ipoib_dev_priv, restart_task);
734 ipoib_mcast_restart(priv);
735 }
736
ipoib_mcast_restart(struct ipoib_dev_priv * priv)737 void ipoib_mcast_restart(struct ipoib_dev_priv *priv)
738 {
739 struct ifnet *dev = priv->dev;
740 struct ifmultiaddr *ifma;
741 struct ipoib_mcast *mcast, *tmcast;
742 LIST_HEAD(remove_list);
743 struct ib_sa_mcmember_rec rec;
744 int addrlen;
745
746 ipoib_dbg_mcast(priv, "restarting multicast task flags 0x%lX\n",
747 priv->flags);
748
749 ipoib_mcast_stop_thread(priv, 0);
750
751 if_maddr_rlock(dev);
752 spin_lock(&priv->lock);
753
754 /*
755 * Unfortunately, the networking core only gives us a list of all of
756 * the multicast hardware addresses. We need to figure out which ones
757 * are new and which ones have been removed
758 */
759
760 /* Clear out the found flag */
761 list_for_each_entry(mcast, &priv->multicast_list, list)
762 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
763
764 /* Mark all of the entries that are found or don't exist */
765
766
767 CK_STAILQ_FOREACH(ifma, &dev->if_multiaddrs, ifma_link) {
768 union ib_gid mgid;
769 uint8_t *addr;
770
771 if (ifma->ifma_addr->sa_family != AF_LINK)
772 continue;
773 addr = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
774 addrlen = ((struct sockaddr_dl *)ifma->ifma_addr)->sdl_alen;
775 if (!ipoib_mcast_addr_is_valid(addr, addrlen,
776 dev->if_broadcastaddr))
777 continue;
778
779 memcpy(mgid.raw, addr + 4, sizeof mgid);
780
781 mcast = __ipoib_mcast_find(priv, &mgid);
782 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
783 struct ipoib_mcast *nmcast;
784
785 /* ignore group which is directly joined by userspace */
786 if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) &&
787 !ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) {
788 ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid %16D\n",
789 mgid.raw, ":");
790 continue;
791 }
792
793 /* Not found or send-only group, let's add a new entry */
794 ipoib_dbg_mcast(priv, "adding multicast entry for mgid %16D\n",
795 mgid.raw, ":");
796
797 nmcast = ipoib_mcast_alloc(priv, 0);
798 if (!nmcast) {
799 ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
800 continue;
801 }
802
803 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags);
804
805 nmcast->mcmember.mgid = mgid;
806
807 if (mcast) {
808 /* Destroy the send only entry */
809 list_move_tail(&mcast->list, &remove_list);
810
811 rb_replace_node(&mcast->rb_node,
812 &nmcast->rb_node,
813 &priv->multicast_tree);
814 } else
815 __ipoib_mcast_add(priv, nmcast);
816
817 list_add_tail(&nmcast->list, &priv->multicast_list);
818 }
819
820 if (mcast)
821 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
822 }
823
824 /* Remove all of the entries don't exist anymore */
825 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
826 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) &&
827 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
828 ipoib_dbg_mcast(priv, "deleting multicast group %16D\n",
829 mcast->mcmember.mgid.raw, ":");
830
831 rb_erase(&mcast->rb_node, &priv->multicast_tree);
832
833 /* Move to the remove list */
834 list_move_tail(&mcast->list, &remove_list);
835 }
836 }
837
838 spin_unlock(&priv->lock);
839 if_maddr_runlock(dev);
840
841 /* We have to cancel outside of the spinlock */
842 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
843 ipoib_mcast_leave(mcast->priv, mcast);
844 ipoib_mcast_free(mcast);
845 }
846
847 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
848 ipoib_mcast_start_thread(priv);
849 }
850
851 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
852
ipoib_mcast_iter_init(struct ipoib_dev_priv * priv)853 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct ipoib_dev_priv *priv)
854 {
855 struct ipoib_mcast_iter *iter;
856
857 iter = kmalloc(sizeof *iter, GFP_KERNEL);
858 if (!iter)
859 return NULL;
860
861 iter->priv = priv;
862 memset(iter->mgid.raw, 0, 16);
863
864 if (ipoib_mcast_iter_next(iter)) {
865 kfree(iter);
866 return NULL;
867 }
868
869 return iter;
870 }
871
ipoib_mcast_iter_next(struct ipoib_mcast_iter * iter)872 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
873 {
874 struct ipoib_dev_priv *priv = iter->priv;
875 struct rb_node *n;
876 struct ipoib_mcast *mcast;
877 int ret = 1;
878
879 spin_lock_irq(&priv->lock);
880
881 n = rb_first(&priv->multicast_tree);
882
883 while (n) {
884 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
885
886 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw,
887 sizeof (union ib_gid)) < 0) {
888 iter->mgid = mcast->mcmember.mgid;
889 iter->created = mcast->created;
890 iter->queuelen = mcast->pkt_queue.ifq_len;
891 iter->complete = !!mcast->ah;
892 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY));
893
894 ret = 0;
895
896 break;
897 }
898
899 n = rb_next(n);
900 }
901
902 spin_unlock_irq(&priv->lock);
903
904 return ret;
905 }
906
ipoib_mcast_iter_read(struct ipoib_mcast_iter * iter,union ib_gid * mgid,unsigned long * created,unsigned int * queuelen,unsigned int * complete,unsigned int * send_only)907 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
908 union ib_gid *mgid,
909 unsigned long *created,
910 unsigned int *queuelen,
911 unsigned int *complete,
912 unsigned int *send_only)
913 {
914 *mgid = iter->mgid;
915 *created = iter->created;
916 *queuelen = iter->queuelen;
917 *complete = iter->complete;
918 *send_only = iter->send_only;
919 }
920
921 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
922