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sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
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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 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 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 } 101 102 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 } 125 126 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 } 153 154 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 struct epoch_tracker et; 161 int ret; 162 int set_qkey = 0; 163 164 mcast->mcmember = *mcmember; 165 166 /* Set the cached Q_Key before we attach if it's the broadcast group */ 167 if (!memcmp(mcast->mcmember.mgid.raw, dev->if_broadcastaddr + 4, 168 sizeof (union ib_gid))) { 169 spin_lock_irq(&priv->lock); 170 if (!priv->broadcast) { 171 spin_unlock_irq(&priv->lock); 172 return -EAGAIN; 173 } 174 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); 175 spin_unlock_irq(&priv->lock); 176 priv->tx_wr.remote_qkey = priv->qkey; 177 set_qkey = 1; 178 } 179 180 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 181 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 182 ipoib_warn(priv, "multicast group %16D already attached\n", 183 mcast->mcmember.mgid.raw, ":"); 184 185 return 0; 186 } 187 188 ret = ipoib_mcast_attach(priv, be16_to_cpu(mcast->mcmember.mlid), 189 &mcast->mcmember.mgid, set_qkey); 190 if (ret < 0) { 191 ipoib_warn(priv, "couldn't attach QP to multicast group %16D\n", 192 mcast->mcmember.mgid.raw, ":"); 193 194 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); 195 return ret; 196 } 197 } 198 199 { 200 struct ib_ah_attr av = { 201 .dlid = be16_to_cpu(mcast->mcmember.mlid), 202 .port_num = priv->port, 203 .sl = mcast->mcmember.sl, 204 .ah_flags = IB_AH_GRH, 205 .static_rate = mcast->mcmember.rate, 206 .grh = { 207 .flow_label = be32_to_cpu(mcast->mcmember.flow_label), 208 .hop_limit = mcast->mcmember.hop_limit, 209 .sgid_index = 0, 210 .traffic_class = mcast->mcmember.traffic_class 211 } 212 }; 213 av.grh.dgid = mcast->mcmember.mgid; 214 215 ah = ipoib_create_ah(priv, priv->pd, &av); 216 if (!ah) { 217 ipoib_warn(priv, "ib_address_create failed\n"); 218 } else { 219 spin_lock_irq(&priv->lock); 220 mcast->ah = ah; 221 spin_unlock_irq(&priv->lock); 222 223 ipoib_dbg_mcast(priv, "MGID %16D AV %p, LID 0x%04x, SL %d\n", 224 mcast->mcmember.mgid.raw, ":", 225 mcast->ah->ah, 226 be16_to_cpu(mcast->mcmember.mlid), 227 mcast->mcmember.sl); 228 } 229 } 230 231 NET_EPOCH_ENTER(et); 232 233 /* actually send any queued packets */ 234 while (mcast->pkt_queue.ifq_len) { 235 struct mbuf *mb; 236 _IF_DEQUEUE(&mcast->pkt_queue, mb); 237 mb->m_pkthdr.rcvif = dev; 238 239 if (dev->if_transmit(dev, mb)) 240 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); 241 } 242 243 NET_EPOCH_EXIT(et); 244 return 0; 245 } 246 247 static int 248 ipoib_mcast_sendonly_join_complete(int status, 249 struct ib_sa_multicast *multicast) 250 { 251 struct ipoib_mcast *mcast = multicast->context; 252 struct ipoib_dev_priv *priv = mcast->priv; 253 254 /* We trap for port events ourselves. */ 255 if (status == -ENETRESET) 256 return 0; 257 258 if (!status) 259 status = ipoib_mcast_join_finish(mcast, &multicast->rec); 260 261 if (status) { 262 if (mcast->logcount++ < 20) 263 ipoib_dbg_mcast(priv, "multicast join failed for %16D, status %d\n", 264 mcast->mcmember.mgid.raw, ":", status); 265 266 /* Flush out any queued packets */ 267 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, mcast->pkt_queue.ifq_len); 268 _IF_DRAIN(&mcast->pkt_queue); 269 270 /* Clear the busy flag so we try again */ 271 status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, 272 &mcast->flags); 273 } 274 return status; 275 } 276 277 static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast) 278 { 279 struct ipoib_dev_priv *priv = mcast->priv; 280 struct ib_sa_mcmember_rec rec = { 281 #if 0 /* Some SMs don't support send-only yet */ 282 .join_state = 4 283 #else 284 .join_state = 1 285 #endif 286 }; 287 int ret = 0; 288 289 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { 290 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n"); 291 return -ENODEV; 292 } 293 294 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { 295 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n"); 296 return -EBUSY; 297 } 298 299 rec.mgid = mcast->mcmember.mgid; 300 rec.port_gid = priv->local_gid; 301 rec.pkey = cpu_to_be16(priv->pkey); 302 303 mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, 304 priv->port, &rec, 305 IB_SA_MCMEMBER_REC_MGID | 306 IB_SA_MCMEMBER_REC_PORT_GID | 307 IB_SA_MCMEMBER_REC_PKEY | 308 IB_SA_MCMEMBER_REC_JOIN_STATE, 309 GFP_ATOMIC, 310 ipoib_mcast_sendonly_join_complete, 311 mcast); 312 if (IS_ERR(mcast->mc)) { 313 ret = PTR_ERR(mcast->mc); 314 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 315 ipoib_warn(priv, "ib_sa_join_multicast failed (ret = %d)\n", 316 ret); 317 } else { 318 ipoib_dbg_mcast(priv, "no multicast record for %16D, starting join\n", 319 mcast->mcmember.mgid.raw, ":"); 320 } 321 322 return ret; 323 } 324 325 void ipoib_mcast_carrier_on_task(struct work_struct *work) 326 { 327 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 328 carrier_on_task); 329 struct ib_port_attr attr; 330 331 /* 332 * Take rtnl_lock to avoid racing with ipoib_stop() and 333 * turning the carrier back on while a device is being 334 * removed. 335 */ 336 if (ib_query_port(priv->ca, priv->port, &attr) || 337 attr.state != IB_PORT_ACTIVE) { 338 ipoib_dbg(priv, "Keeping carrier off until IB port is active\n"); 339 return; 340 } 341 if_link_state_change(priv->dev, LINK_STATE_UP); 342 } 343 344 static int ipoib_mcast_join_complete(int status, 345 struct ib_sa_multicast *multicast) 346 { 347 struct ipoib_mcast *mcast = multicast->context; 348 struct ipoib_dev_priv *priv = mcast->priv; 349 350 ipoib_dbg_mcast(priv, "join completion for %16D (status %d)\n", 351 mcast->mcmember.mgid.raw, ":", status); 352 353 /* We trap for port events ourselves. */ 354 if (status == -ENETRESET) 355 return 0; 356 357 if (!status) 358 status = ipoib_mcast_join_finish(mcast, &multicast->rec); 359 360 if (!status) { 361 mcast->backoff = 1; 362 mutex_lock(&mcast_mutex); 363 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 364 queue_delayed_work(ipoib_workqueue, 365 &priv->mcast_task, 0); 366 mutex_unlock(&mcast_mutex); 367 368 /* 369 * Defer carrier on work to ipoib_workqueue to avoid a 370 * deadlock on rtnl_lock here. 371 */ 372 if (mcast == priv->broadcast) 373 queue_work(ipoib_workqueue, &priv->carrier_on_task); 374 375 return 0; 376 } 377 378 if (mcast->logcount++ < 20) { 379 if (status == -ETIMEDOUT || status == -EAGAIN) { 380 ipoib_dbg_mcast(priv, "multicast join failed for %16D, status %d\n", 381 mcast->mcmember.mgid.raw, ":", status); 382 } else { 383 ipoib_warn(priv, "multicast join failed for %16D, status %d\n", 384 mcast->mcmember.mgid.raw, ":", status); 385 } 386 } 387 388 mcast->backoff *= 2; 389 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) 390 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; 391 392 /* Clear the busy flag so we try again */ 393 status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 394 395 mutex_lock(&mcast_mutex); 396 spin_lock_irq(&priv->lock); 397 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 398 queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 399 mcast->backoff * HZ); 400 spin_unlock_irq(&priv->lock); 401 mutex_unlock(&mcast_mutex); 402 403 return status; 404 } 405 406 static void ipoib_mcast_join(struct ipoib_dev_priv *priv, 407 struct ipoib_mcast *mcast, int create) 408 { 409 struct ib_sa_mcmember_rec rec = { 410 .join_state = 1 411 }; 412 ib_sa_comp_mask comp_mask; 413 int ret = 0; 414 415 ipoib_dbg_mcast(priv, "joining MGID %16D\n", 416 mcast->mcmember.mgid.raw, ":"); 417 418 rec.mgid = mcast->mcmember.mgid; 419 rec.port_gid = priv->local_gid; 420 rec.pkey = cpu_to_be16(priv->pkey); 421 422 comp_mask = 423 IB_SA_MCMEMBER_REC_MGID | 424 IB_SA_MCMEMBER_REC_PORT_GID | 425 IB_SA_MCMEMBER_REC_PKEY | 426 IB_SA_MCMEMBER_REC_JOIN_STATE; 427 428 if (create) { 429 comp_mask |= 430 IB_SA_MCMEMBER_REC_QKEY | 431 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 432 IB_SA_MCMEMBER_REC_MTU | 433 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS | 434 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 435 IB_SA_MCMEMBER_REC_RATE | 436 IB_SA_MCMEMBER_REC_SL | 437 IB_SA_MCMEMBER_REC_FLOW_LABEL | 438 IB_SA_MCMEMBER_REC_HOP_LIMIT; 439 440 rec.qkey = priv->broadcast->mcmember.qkey; 441 rec.mtu_selector = IB_SA_EQ; 442 rec.mtu = priv->broadcast->mcmember.mtu; 443 rec.traffic_class = priv->broadcast->mcmember.traffic_class; 444 rec.rate_selector = IB_SA_EQ; 445 rec.rate = priv->broadcast->mcmember.rate; 446 rec.sl = priv->broadcast->mcmember.sl; 447 rec.flow_label = priv->broadcast->mcmember.flow_label; 448 rec.hop_limit = priv->broadcast->mcmember.hop_limit; 449 } 450 451 set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 452 mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port, 453 &rec, comp_mask, GFP_KERNEL, 454 ipoib_mcast_join_complete, mcast); 455 if (IS_ERR(mcast->mc)) { 456 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 457 ret = PTR_ERR(mcast->mc); 458 ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret); 459 460 mcast->backoff *= 2; 461 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) 462 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; 463 464 mutex_lock(&mcast_mutex); 465 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 466 queue_delayed_work(ipoib_workqueue, 467 &priv->mcast_task, 468 mcast->backoff * HZ); 469 mutex_unlock(&mcast_mutex); 470 } 471 } 472 473 void ipoib_mcast_join_task(struct work_struct *work) 474 { 475 struct ipoib_dev_priv *priv = 476 container_of(work, struct ipoib_dev_priv, mcast_task.work); 477 struct ifnet *dev = priv->dev; 478 struct ib_port_attr attr; 479 480 ipoib_dbg_mcast(priv, "Running join task. flags 0x%lX\n", priv->flags); 481 482 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) 483 return; 484 485 if (ib_query_port(priv->ca, priv->port, &attr) || 486 attr.state != IB_PORT_ACTIVE) { 487 ipoib_dbg(priv, "%s: port state is not ACTIVE (state = %d) suspend task.\n", 488 __func__, attr.state); 489 return; 490 } 491 492 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid, NULL)) 493 ipoib_warn(priv, "ib_query_gid() failed\n"); 494 else 495 memcpy(IF_LLADDR(dev) + 4, priv->local_gid.raw, sizeof (union ib_gid)); 496 497 { 498 struct ib_port_attr attr; 499 500 if (!ib_query_port(priv->ca, priv->port, &attr)) 501 priv->local_lid = attr.lid; 502 else 503 ipoib_warn(priv, "ib_query_port failed\n"); 504 } 505 506 if (!priv->broadcast) { 507 struct ipoib_mcast *broadcast; 508 509 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 510 return; 511 512 broadcast = ipoib_mcast_alloc(priv, 1); 513 if (!broadcast) { 514 ipoib_warn(priv, "failed to allocate broadcast group\n"); 515 mutex_lock(&mcast_mutex); 516 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 517 queue_delayed_work(ipoib_workqueue, 518 &priv->mcast_task, HZ); 519 mutex_unlock(&mcast_mutex); 520 return; 521 } 522 523 spin_lock_irq(&priv->lock); 524 memcpy(broadcast->mcmember.mgid.raw, dev->if_broadcastaddr + 4, 525 sizeof (union ib_gid)); 526 priv->broadcast = broadcast; 527 528 __ipoib_mcast_add(priv, priv->broadcast); 529 spin_unlock_irq(&priv->lock); 530 } 531 532 if (priv->broadcast && 533 !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { 534 if (priv->broadcast && 535 !test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags)) 536 ipoib_mcast_join(priv, priv->broadcast, 0); 537 return; 538 } 539 540 while (1) { 541 struct ipoib_mcast *mcast = NULL; 542 543 spin_lock_irq(&priv->lock); 544 list_for_each_entry(mcast, &priv->multicast_list, list) { 545 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) 546 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) 547 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 548 /* Found the next unjoined group */ 549 break; 550 } 551 } 552 spin_unlock_irq(&priv->lock); 553 554 if (&mcast->list == &priv->multicast_list) { 555 /* All done */ 556 break; 557 } 558 559 ipoib_mcast_join(priv, mcast, 1); 560 return; 561 } 562 563 spin_lock_irq(&priv->lock); 564 if (priv->broadcast) 565 priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu)); 566 else 567 priv->mcast_mtu = priv->admin_mtu; 568 spin_unlock_irq(&priv->lock); 569 570 if (!ipoib_cm_admin_enabled(priv)) 571 ipoib_change_mtu(priv, min(priv->mcast_mtu, priv->admin_mtu), 572 true); 573 574 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n"); 575 576 clear_bit(IPOIB_MCAST_RUN, &priv->flags); 577 } 578 579 int ipoib_mcast_start_thread(struct ipoib_dev_priv *priv) 580 { 581 ipoib_dbg_mcast(priv, "starting multicast thread flags 0x%lX\n", 582 priv->flags); 583 584 mutex_lock(&mcast_mutex); 585 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags)) 586 queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0); 587 mutex_unlock(&mcast_mutex); 588 589 return 0; 590 } 591 592 int ipoib_mcast_stop_thread(struct ipoib_dev_priv *priv, int flush) 593 { 594 595 ipoib_dbg_mcast(priv, "stopping multicast thread\n"); 596 597 mutex_lock(&mcast_mutex); 598 clear_bit(IPOIB_MCAST_RUN, &priv->flags); 599 cancel_delayed_work(&priv->mcast_task); 600 mutex_unlock(&mcast_mutex); 601 602 if (flush) 603 flush_workqueue(ipoib_workqueue); 604 605 return 0; 606 } 607 608 static int ipoib_mcast_leave(struct ipoib_dev_priv *priv, struct ipoib_mcast *mcast) 609 { 610 int ret = 0; 611 612 if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) 613 ib_sa_free_multicast(mcast->mc); 614 615 if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 616 ipoib_dbg_mcast(priv, "leaving MGID %16D\n", 617 mcast->mcmember.mgid.raw, ":"); 618 619 /* Remove ourselves from the multicast group */ 620 ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid, 621 be16_to_cpu(mcast->mcmember.mlid)); 622 if (ret) 623 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret); 624 } 625 626 return 0; 627 } 628 629 void 630 ipoib_mcast_send(struct ipoib_dev_priv *priv, void *mgid, struct mbuf *mb) 631 { 632 struct ifnet *dev = priv->dev; 633 struct ipoib_mcast *mcast; 634 635 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) || 636 !priv->broadcast || 637 !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { 638 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 639 m_freem(mb); 640 return; 641 } 642 643 mcast = __ipoib_mcast_find(priv, mgid); 644 if (!mcast) { 645 /* Let's create a new send only group now */ 646 ipoib_dbg_mcast(priv, "setting up send only multicast group for %16D\n", 647 mgid, ":"); 648 649 mcast = ipoib_mcast_alloc(priv, 0); 650 if (!mcast) { 651 ipoib_warn(priv, "unable to allocate memory for " 652 "multicast structure\n"); 653 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 654 m_freem(mb); 655 goto out; 656 } 657 658 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); 659 memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid)); 660 __ipoib_mcast_add(priv, mcast); 661 list_add_tail(&mcast->list, &priv->multicast_list); 662 } 663 664 if (!mcast->ah) { 665 if (mcast->pkt_queue.ifq_len < IPOIB_MAX_MCAST_QUEUE) { 666 _IF_ENQUEUE(&mcast->pkt_queue, mb); 667 } else { 668 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 669 m_freem(mb); 670 } 671 672 if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) 673 ipoib_dbg_mcast(priv, "no address vector, " 674 "but multicast join already started\n"); 675 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) 676 ipoib_mcast_sendonly_join(mcast); 677 678 /* 679 * If lookup completes between here and out:, don't 680 * want to send packet twice. 681 */ 682 mcast = NULL; 683 } 684 685 out: 686 if (mcast && mcast->ah) 687 ipoib_send(priv, mb, mcast->ah, IB_MULTICAST_QPN); 688 } 689 690 void ipoib_mcast_dev_flush(struct ipoib_dev_priv *priv) 691 { 692 LIST_HEAD(remove_list); 693 struct ipoib_mcast *mcast, *tmcast; 694 unsigned long flags; 695 696 ipoib_dbg_mcast(priv, "flushing multicast list\n"); 697 698 spin_lock_irqsave(&priv->lock, flags); 699 700 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { 701 list_del(&mcast->list); 702 rb_erase(&mcast->rb_node, &priv->multicast_tree); 703 list_add_tail(&mcast->list, &remove_list); 704 } 705 706 if (priv->broadcast) { 707 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); 708 list_add_tail(&priv->broadcast->list, &remove_list); 709 priv->broadcast = NULL; 710 } 711 712 spin_unlock_irqrestore(&priv->lock, flags); 713 714 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { 715 ipoib_mcast_leave(priv, mcast); 716 ipoib_mcast_free(mcast); 717 } 718 } 719 720 static int ipoib_mcast_addr_is_valid(const u8 *addr, unsigned int addrlen, 721 const u8 *broadcast) 722 { 723 if (addrlen != INFINIBAND_ALEN) 724 return 0; 725 /* reserved QPN, prefix, scope */ 726 if (memcmp(addr, broadcast, 6)) 727 return 0; 728 /* signature lower, pkey */ 729 if (memcmp(addr + 7, broadcast + 7, 3)) 730 return 0; 731 return 1; 732 } 733 734 void ipoib_mcast_restart_task(struct work_struct *work) 735 { 736 struct ipoib_dev_priv *priv = 737 container_of(work, struct ipoib_dev_priv, restart_task); 738 ipoib_mcast_restart(priv); 739 } 740 741 struct ipoib_mcast_ctx { 742 struct ipoib_dev_priv *priv; 743 struct list_head remove_list; 744 }; 745 746 static u_int 747 ipoib_process_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt) 748 { 749 struct ipoib_mcast_ctx *ctx = arg; 750 struct ipoib_dev_priv *priv = ctx->priv; 751 struct ipoib_mcast *mcast; 752 struct ib_sa_mcmember_rec rec; 753 union ib_gid mgid; 754 uint8_t *addr; 755 int addrlen; 756 757 addr = LLADDR(sdl); 758 addrlen = sdl->sdl_alen; 759 if (!ipoib_mcast_addr_is_valid(addr, addrlen, 760 priv->dev->if_broadcastaddr)) 761 return (0); 762 763 memcpy(mgid.raw, addr + 4, sizeof mgid); 764 765 mcast = __ipoib_mcast_find(priv, &mgid); 766 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 767 struct ipoib_mcast *nmcast; 768 769 /* ignore group which is directly joined by userspace */ 770 if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) && 771 !ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) { 772 ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid %16D\n", 773 mgid.raw, ":"); 774 return (0); 775 } 776 777 /* Not found or send-only group, let's add a new entry */ 778 ipoib_dbg_mcast(priv, "adding multicast entry for mgid %16D\n", 779 mgid.raw, ":"); 780 781 nmcast = ipoib_mcast_alloc(priv, 0); 782 if (!nmcast) { 783 ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); 784 return (0); 785 } 786 787 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); 788 789 nmcast->mcmember.mgid = mgid; 790 791 if (mcast) { 792 /* Destroy the send only entry */ 793 list_move_tail(&mcast->list, &ctx->remove_list); 794 795 rb_replace_node(&mcast->rb_node, 796 &nmcast->rb_node, 797 &priv->multicast_tree); 798 } else 799 __ipoib_mcast_add(priv, nmcast); 800 801 list_add_tail(&nmcast->list, &priv->multicast_list); 802 } 803 804 if (mcast) 805 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); 806 807 return (1); 808 } 809 810 void ipoib_mcast_restart(struct ipoib_dev_priv *priv) 811 { 812 struct ipoib_mcast_ctx ctx = { priv, 813 { &ctx.remove_list, &ctx.remove_list }}; 814 struct ifnet *dev = priv->dev; 815 struct ipoib_mcast *mcast, *tmcast; 816 817 ipoib_dbg_mcast(priv, "restarting multicast task flags 0x%lX\n", 818 priv->flags); 819 820 ipoib_mcast_stop_thread(priv, 0); 821 822 spin_lock(&priv->lock); 823 824 /* 825 * Unfortunately, the networking core only gives us a list of all of 826 * the multicast hardware addresses. We need to figure out which ones 827 * are new and which ones have been removed 828 */ 829 830 /* Clear out the found flag */ 831 list_for_each_entry(mcast, &priv->multicast_list, list) 832 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); 833 834 /* Mark all of the entries that are found or don't exist */ 835 ctx.priv = priv; 836 if_foreach_llmaddr(dev, ipoib_process_maddr, &ctx); 837 838 /* Remove all of the entries don't exist anymore */ 839 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { 840 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && 841 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 842 ipoib_dbg_mcast(priv, "deleting multicast group %16D\n", 843 mcast->mcmember.mgid.raw, ":"); 844 845 rb_erase(&mcast->rb_node, &priv->multicast_tree); 846 847 /* Move to the remove list */ 848 list_move_tail(&mcast->list, &ctx.remove_list); 849 } 850 } 851 852 spin_unlock(&priv->lock); 853 854 /* We have to cancel outside of the spinlock */ 855 list_for_each_entry_safe(mcast, tmcast, &ctx.remove_list, list) { 856 ipoib_mcast_leave(mcast->priv, mcast); 857 ipoib_mcast_free(mcast); 858 } 859 860 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 861 ipoib_mcast_start_thread(priv); 862 } 863 864 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 865 866 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct ipoib_dev_priv *priv) 867 { 868 struct ipoib_mcast_iter *iter; 869 870 iter = kmalloc(sizeof *iter, GFP_KERNEL); 871 if (!iter) 872 return NULL; 873 874 iter->priv = priv; 875 memset(iter->mgid.raw, 0, 16); 876 877 if (ipoib_mcast_iter_next(iter)) { 878 kfree(iter); 879 return NULL; 880 } 881 882 return iter; 883 } 884 885 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) 886 { 887 struct ipoib_dev_priv *priv = iter->priv; 888 struct rb_node *n; 889 struct ipoib_mcast *mcast; 890 int ret = 1; 891 892 spin_lock_irq(&priv->lock); 893 894 n = rb_first(&priv->multicast_tree); 895 896 while (n) { 897 mcast = rb_entry(n, struct ipoib_mcast, rb_node); 898 899 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, 900 sizeof (union ib_gid)) < 0) { 901 iter->mgid = mcast->mcmember.mgid; 902 iter->created = mcast->created; 903 iter->queuelen = mcast->pkt_queue.ifq_len; 904 iter->complete = !!mcast->ah; 905 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); 906 907 ret = 0; 908 909 break; 910 } 911 912 n = rb_next(n); 913 } 914 915 spin_unlock_irq(&priv->lock); 916 917 return ret; 918 } 919 920 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, 921 union ib_gid *mgid, 922 unsigned long *created, 923 unsigned int *queuelen, 924 unsigned int *complete, 925 unsigned int *send_only) 926 { 927 *mgid = iter->mgid; 928 *created = iter->created; 929 *queuelen = iter->queuelen; 930 *complete = iter->complete; 931 *send_only = iter->send_only; 932 } 933 934 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
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