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