1 /* 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. 5 * 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: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 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. 24 * 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 32 * SOFTWARE. 33 * 34 * $Id: ipoib_multicast.c 1362 2004-12-18 15:56:29Z roland $ 35 */ 36 37 #include <linux/skbuff.h> 38 #include <linux/rtnetlink.h> 39 #include <linux/ip.h> 40 #include <linux/in.h> 41 #include <linux/igmp.h> 42 #include <linux/inetdevice.h> 43 #include <linux/delay.h> 44 #include <linux/completion.h> 45 46 #include <net/dst.h> 47 48 #include "ipoib.h" 49 50 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 51 static int mcast_debug_level; 52 53 module_param(mcast_debug_level, int, 0644); 54 MODULE_PARM_DESC(mcast_debug_level, 55 "Enable multicast debug tracing if > 0"); 56 #endif 57 58 static DECLARE_MUTEX(mcast_mutex); 59 60 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */ 61 struct ipoib_mcast { 62 struct ib_sa_mcmember_rec mcmember; 63 struct ipoib_ah *ah; 64 65 struct rb_node rb_node; 66 struct list_head list; 67 struct completion done; 68 69 int query_id; 70 struct ib_sa_query *query; 71 72 unsigned long created; 73 unsigned long backoff; 74 75 unsigned long flags; 76 unsigned char logcount; 77 78 struct list_head neigh_list; 79 80 struct sk_buff_head pkt_queue; 81 82 struct net_device *dev; 83 }; 84 85 struct ipoib_mcast_iter { 86 struct net_device *dev; 87 union ib_gid mgid; 88 unsigned long created; 89 unsigned int queuelen; 90 unsigned int complete; 91 unsigned int send_only; 92 }; 93 94 static void ipoib_mcast_free(struct ipoib_mcast *mcast) 95 { 96 struct net_device *dev = mcast->dev; 97 struct ipoib_dev_priv *priv = netdev_priv(dev); 98 struct ipoib_neigh *neigh, *tmp; 99 unsigned long flags; 100 LIST_HEAD(ah_list); 101 struct ipoib_ah *ah, *tah; 102 103 ipoib_dbg_mcast(netdev_priv(dev), 104 "deleting multicast group " IPOIB_GID_FMT "\n", 105 IPOIB_GID_ARG(mcast->mcmember.mgid)); 106 107 spin_lock_irqsave(&priv->lock, flags); 108 109 list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) { 110 if (neigh->ah) 111 list_add_tail(&neigh->ah->list, &ah_list); 112 *to_ipoib_neigh(neigh->neighbour) = NULL; 113 neigh->neighbour->ops->destructor = NULL; 114 kfree(neigh); 115 } 116 117 spin_unlock_irqrestore(&priv->lock, flags); 118 119 list_for_each_entry_safe(ah, tah, &ah_list, list) 120 ipoib_put_ah(ah); 121 122 if (mcast->ah) 123 ipoib_put_ah(mcast->ah); 124 125 while (!skb_queue_empty(&mcast->pkt_queue)) 126 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); 127 128 kfree(mcast); 129 } 130 131 static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, 132 int can_sleep) 133 { 134 struct ipoib_mcast *mcast; 135 136 mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC); 137 if (!mcast) 138 return NULL; 139 140 mcast->dev = dev; 141 mcast->created = jiffies; 142 mcast->backoff = 1; 143 144 INIT_LIST_HEAD(&mcast->list); 145 INIT_LIST_HEAD(&mcast->neigh_list); 146 skb_queue_head_init(&mcast->pkt_queue); 147 148 return mcast; 149 } 150 151 static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_gid *mgid) 152 { 153 struct ipoib_dev_priv *priv = netdev_priv(dev); 154 struct rb_node *n = priv->multicast_tree.rb_node; 155 156 while (n) { 157 struct ipoib_mcast *mcast; 158 int ret; 159 160 mcast = rb_entry(n, struct ipoib_mcast, rb_node); 161 162 ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw, 163 sizeof (union ib_gid)); 164 if (ret < 0) 165 n = n->rb_left; 166 else if (ret > 0) 167 n = n->rb_right; 168 else 169 return mcast; 170 } 171 172 return NULL; 173 } 174 175 static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) 176 { 177 struct ipoib_dev_priv *priv = netdev_priv(dev); 178 struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; 179 180 while (*n) { 181 struct ipoib_mcast *tmcast; 182 int ret; 183 184 pn = *n; 185 tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); 186 187 ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw, 188 sizeof (union ib_gid)); 189 if (ret < 0) 190 n = &pn->rb_left; 191 else if (ret > 0) 192 n = &pn->rb_right; 193 else 194 return -EEXIST; 195 } 196 197 rb_link_node(&mcast->rb_node, pn, n); 198 rb_insert_color(&mcast->rb_node, &priv->multicast_tree); 199 200 return 0; 201 } 202 203 static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, 204 struct ib_sa_mcmember_rec *mcmember) 205 { 206 struct net_device *dev = mcast->dev; 207 struct ipoib_dev_priv *priv = netdev_priv(dev); 208 int ret; 209 210 mcast->mcmember = *mcmember; 211 212 /* Set the cached Q_Key before we attach if it's the broadcast group */ 213 if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4, 214 sizeof (union ib_gid))) { 215 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); 216 priv->tx_wr.wr.ud.remote_qkey = priv->qkey; 217 } 218 219 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 220 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 221 ipoib_warn(priv, "multicast group " IPOIB_GID_FMT 222 " already attached\n", 223 IPOIB_GID_ARG(mcast->mcmember.mgid)); 224 225 return 0; 226 } 227 228 ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid), 229 &mcast->mcmember.mgid); 230 if (ret < 0) { 231 ipoib_warn(priv, "couldn't attach QP to multicast group " 232 IPOIB_GID_FMT "\n", 233 IPOIB_GID_ARG(mcast->mcmember.mgid)); 234 235 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); 236 return ret; 237 } 238 } 239 240 { 241 struct ib_ah_attr av = { 242 .dlid = be16_to_cpu(mcast->mcmember.mlid), 243 .port_num = priv->port, 244 .sl = mcast->mcmember.sl, 245 .ah_flags = IB_AH_GRH, 246 .grh = { 247 .flow_label = be32_to_cpu(mcast->mcmember.flow_label), 248 .hop_limit = mcast->mcmember.hop_limit, 249 .sgid_index = 0, 250 .traffic_class = mcast->mcmember.traffic_class 251 } 252 }; 253 int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate); 254 255 av.grh.dgid = mcast->mcmember.mgid; 256 257 if (path_rate > 0 && priv->local_rate > path_rate) 258 av.static_rate = (priv->local_rate - 1) / path_rate; 259 260 ipoib_dbg_mcast(priv, "static_rate %d for local port %dX, mcmember %dX\n", 261 av.static_rate, priv->local_rate, 262 ib_sa_rate_enum_to_int(mcast->mcmember.rate)); 263 264 mcast->ah = ipoib_create_ah(dev, priv->pd, &av); 265 if (!mcast->ah) { 266 ipoib_warn(priv, "ib_address_create failed\n"); 267 } else { 268 ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT 269 " AV %p, LID 0x%04x, SL %d\n", 270 IPOIB_GID_ARG(mcast->mcmember.mgid), 271 mcast->ah->ah, 272 be16_to_cpu(mcast->mcmember.mlid), 273 mcast->mcmember.sl); 274 } 275 } 276 277 /* actually send any queued packets */ 278 while (!skb_queue_empty(&mcast->pkt_queue)) { 279 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); 280 281 skb->dev = dev; 282 283 if (!skb->dst || !skb->dst->neighbour) { 284 /* put pseudoheader back on for next time */ 285 skb_push(skb, sizeof (struct ipoib_pseudoheader)); 286 } 287 288 if (dev_queue_xmit(skb)) 289 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); 290 } 291 292 return 0; 293 } 294 295 static void 296 ipoib_mcast_sendonly_join_complete(int status, 297 struct ib_sa_mcmember_rec *mcmember, 298 void *mcast_ptr) 299 { 300 struct ipoib_mcast *mcast = mcast_ptr; 301 struct net_device *dev = mcast->dev; 302 303 if (!status) 304 ipoib_mcast_join_finish(mcast, mcmember); 305 else { 306 if (mcast->logcount++ < 20) 307 ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for " 308 IPOIB_GID_FMT ", status %d\n", 309 IPOIB_GID_ARG(mcast->mcmember.mgid), status); 310 311 /* Flush out any queued packets */ 312 while (!skb_queue_empty(&mcast->pkt_queue)) 313 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); 314 315 /* Clear the busy flag so we try again */ 316 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 317 } 318 319 complete(&mcast->done); 320 } 321 322 static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast) 323 { 324 struct net_device *dev = mcast->dev; 325 struct ipoib_dev_priv *priv = netdev_priv(dev); 326 struct ib_sa_mcmember_rec rec = { 327 #if 0 /* Some SMs don't support send-only yet */ 328 .join_state = 4 329 #else 330 .join_state = 1 331 #endif 332 }; 333 int ret = 0; 334 335 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { 336 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n"); 337 return -ENODEV; 338 } 339 340 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { 341 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n"); 342 return -EBUSY; 343 } 344 345 rec.mgid = mcast->mcmember.mgid; 346 rec.port_gid = priv->local_gid; 347 rec.pkey = cpu_to_be16(priv->pkey); 348 349 init_completion(&mcast->done); 350 351 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, 352 IB_SA_MCMEMBER_REC_MGID | 353 IB_SA_MCMEMBER_REC_PORT_GID | 354 IB_SA_MCMEMBER_REC_PKEY | 355 IB_SA_MCMEMBER_REC_JOIN_STATE, 356 1000, GFP_ATOMIC, 357 ipoib_mcast_sendonly_join_complete, 358 mcast, &mcast->query); 359 if (ret < 0) { 360 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n", 361 ret); 362 } else { 363 ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT 364 ", starting join\n", 365 IPOIB_GID_ARG(mcast->mcmember.mgid)); 366 367 mcast->query_id = ret; 368 } 369 370 return ret; 371 } 372 373 static void ipoib_mcast_join_complete(int status, 374 struct ib_sa_mcmember_rec *mcmember, 375 void *mcast_ptr) 376 { 377 struct ipoib_mcast *mcast = mcast_ptr; 378 struct net_device *dev = mcast->dev; 379 struct ipoib_dev_priv *priv = netdev_priv(dev); 380 381 ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT 382 " (status %d)\n", 383 IPOIB_GID_ARG(mcast->mcmember.mgid), status); 384 385 if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) { 386 mcast->backoff = 1; 387 down(&mcast_mutex); 388 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 389 queue_work(ipoib_workqueue, &priv->mcast_task); 390 up(&mcast_mutex); 391 complete(&mcast->done); 392 return; 393 } 394 395 if (status == -EINTR) { 396 complete(&mcast->done); 397 return; 398 } 399 400 if (status && mcast->logcount++ < 20) { 401 if (status == -ETIMEDOUT || status == -EINTR) { 402 ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT 403 ", status %d\n", 404 IPOIB_GID_ARG(mcast->mcmember.mgid), 405 status); 406 } else { 407 ipoib_warn(priv, "multicast join failed for " 408 IPOIB_GID_FMT ", status %d\n", 409 IPOIB_GID_ARG(mcast->mcmember.mgid), 410 status); 411 } 412 } 413 414 mcast->backoff *= 2; 415 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) 416 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; 417 418 mcast->query = NULL; 419 420 down(&mcast_mutex); 421 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) { 422 if (status == -ETIMEDOUT) 423 queue_work(ipoib_workqueue, &priv->mcast_task); 424 else 425 queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 426 mcast->backoff * HZ); 427 } else 428 complete(&mcast->done); 429 up(&mcast_mutex); 430 431 return; 432 } 433 434 static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast, 435 int create) 436 { 437 struct ipoib_dev_priv *priv = netdev_priv(dev); 438 struct ib_sa_mcmember_rec rec = { 439 .join_state = 1 440 }; 441 ib_sa_comp_mask comp_mask; 442 int ret = 0; 443 444 ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n", 445 IPOIB_GID_ARG(mcast->mcmember.mgid)); 446 447 rec.mgid = mcast->mcmember.mgid; 448 rec.port_gid = priv->local_gid; 449 rec.pkey = cpu_to_be16(priv->pkey); 450 451 comp_mask = 452 IB_SA_MCMEMBER_REC_MGID | 453 IB_SA_MCMEMBER_REC_PORT_GID | 454 IB_SA_MCMEMBER_REC_PKEY | 455 IB_SA_MCMEMBER_REC_JOIN_STATE; 456 457 if (create) { 458 comp_mask |= 459 IB_SA_MCMEMBER_REC_QKEY | 460 IB_SA_MCMEMBER_REC_SL | 461 IB_SA_MCMEMBER_REC_FLOW_LABEL | 462 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 463 464 rec.qkey = priv->broadcast->mcmember.qkey; 465 rec.sl = priv->broadcast->mcmember.sl; 466 rec.flow_label = priv->broadcast->mcmember.flow_label; 467 rec.traffic_class = priv->broadcast->mcmember.traffic_class; 468 } 469 470 init_completion(&mcast->done); 471 472 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask, 473 mcast->backoff * 1000, GFP_ATOMIC, 474 ipoib_mcast_join_complete, 475 mcast, &mcast->query); 476 477 if (ret < 0) { 478 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", ret); 479 480 mcast->backoff *= 2; 481 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) 482 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; 483 484 down(&mcast_mutex); 485 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 486 queue_delayed_work(ipoib_workqueue, 487 &priv->mcast_task, 488 mcast->backoff * HZ); 489 up(&mcast_mutex); 490 } else 491 mcast->query_id = ret; 492 } 493 494 void ipoib_mcast_join_task(void *dev_ptr) 495 { 496 struct net_device *dev = dev_ptr; 497 struct ipoib_dev_priv *priv = netdev_priv(dev); 498 499 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) 500 return; 501 502 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid)) 503 ipoib_warn(priv, "ib_gid_entry_get() failed\n"); 504 else 505 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); 506 507 { 508 struct ib_port_attr attr; 509 510 if (!ib_query_port(priv->ca, priv->port, &attr)) { 511 priv->local_lid = attr.lid; 512 priv->local_rate = attr.active_speed * 513 ib_width_enum_to_int(attr.active_width); 514 } else 515 ipoib_warn(priv, "ib_query_port failed\n"); 516 } 517 518 if (!priv->broadcast) { 519 priv->broadcast = ipoib_mcast_alloc(dev, 1); 520 if (!priv->broadcast) { 521 ipoib_warn(priv, "failed to allocate broadcast group\n"); 522 down(&mcast_mutex); 523 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 524 queue_delayed_work(ipoib_workqueue, 525 &priv->mcast_task, HZ); 526 up(&mcast_mutex); 527 return; 528 } 529 530 memcpy(priv->broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, 531 sizeof (union ib_gid)); 532 533 spin_lock_irq(&priv->lock); 534 __ipoib_mcast_add(dev, priv->broadcast); 535 spin_unlock_irq(&priv->lock); 536 } 537 538 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { 539 ipoib_mcast_join(dev, priv->broadcast, 0); 540 return; 541 } 542 543 while (1) { 544 struct ipoib_mcast *mcast = NULL; 545 546 spin_lock_irq(&priv->lock); 547 list_for_each_entry(mcast, &priv->multicast_list, list) { 548 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) 549 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) 550 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 551 /* Found the next unjoined group */ 552 break; 553 } 554 } 555 spin_unlock_irq(&priv->lock); 556 557 if (&mcast->list == &priv->multicast_list) { 558 /* All done */ 559 break; 560 } 561 562 ipoib_mcast_join(dev, mcast, 1); 563 return; 564 } 565 566 priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) - 567 IPOIB_ENCAP_LEN; 568 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); 569 570 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n"); 571 572 clear_bit(IPOIB_MCAST_RUN, &priv->flags); 573 netif_carrier_on(dev); 574 } 575 576 int ipoib_mcast_start_thread(struct net_device *dev) 577 { 578 struct ipoib_dev_priv *priv = netdev_priv(dev); 579 580 ipoib_dbg_mcast(priv, "starting multicast thread\n"); 581 582 down(&mcast_mutex); 583 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags)) 584 queue_work(ipoib_workqueue, &priv->mcast_task); 585 up(&mcast_mutex); 586 587 return 0; 588 } 589 590 int ipoib_mcast_stop_thread(struct net_device *dev, int flush) 591 { 592 struct ipoib_dev_priv *priv = netdev_priv(dev); 593 struct ipoib_mcast *mcast; 594 595 ipoib_dbg_mcast(priv, "stopping multicast thread\n"); 596 597 down(&mcast_mutex); 598 clear_bit(IPOIB_MCAST_RUN, &priv->flags); 599 cancel_delayed_work(&priv->mcast_task); 600 up(&mcast_mutex); 601 602 if (flush) 603 flush_workqueue(ipoib_workqueue); 604 605 if (priv->broadcast && priv->broadcast->query) { 606 ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query); 607 priv->broadcast->query = NULL; 608 ipoib_dbg_mcast(priv, "waiting for bcast\n"); 609 wait_for_completion(&priv->broadcast->done); 610 } 611 612 list_for_each_entry(mcast, &priv->multicast_list, list) { 613 if (mcast->query) { 614 ib_sa_cancel_query(mcast->query_id, mcast->query); 615 mcast->query = NULL; 616 ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n", 617 IPOIB_GID_ARG(mcast->mcmember.mgid)); 618 wait_for_completion(&mcast->done); 619 } 620 } 621 622 return 0; 623 } 624 625 static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) 626 { 627 struct ipoib_dev_priv *priv = netdev_priv(dev); 628 struct ib_sa_mcmember_rec rec = { 629 .join_state = 1 630 }; 631 int ret = 0; 632 633 if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) 634 return 0; 635 636 ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n", 637 IPOIB_GID_ARG(mcast->mcmember.mgid)); 638 639 rec.mgid = mcast->mcmember.mgid; 640 rec.port_gid = priv->local_gid; 641 rec.pkey = cpu_to_be16(priv->pkey); 642 643 /* Remove ourselves from the multicast group */ 644 ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid), 645 &mcast->mcmember.mgid); 646 if (ret) 647 ipoib_warn(priv, "ipoib_mcast_detach failed (result = %d)\n", ret); 648 649 /* 650 * Just make one shot at leaving and don't wait for a reply; 651 * if we fail, too bad. 652 */ 653 ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec, 654 IB_SA_MCMEMBER_REC_MGID | 655 IB_SA_MCMEMBER_REC_PORT_GID | 656 IB_SA_MCMEMBER_REC_PKEY | 657 IB_SA_MCMEMBER_REC_JOIN_STATE, 658 0, GFP_ATOMIC, NULL, 659 mcast, &mcast->query); 660 if (ret < 0) 661 ipoib_warn(priv, "ib_sa_mcmember_rec_delete failed " 662 "for leave (result = %d)\n", ret); 663 664 return 0; 665 } 666 667 void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, 668 struct sk_buff *skb) 669 { 670 struct ipoib_dev_priv *priv = netdev_priv(dev); 671 struct ipoib_mcast *mcast; 672 673 /* 674 * We can only be called from ipoib_start_xmit, so we're 675 * inside tx_lock -- no need to save/restore flags. 676 */ 677 spin_lock(&priv->lock); 678 679 mcast = __ipoib_mcast_find(dev, mgid); 680 if (!mcast) { 681 /* Let's create a new send only group now */ 682 ipoib_dbg_mcast(priv, "setting up send only multicast group for " 683 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid)); 684 685 mcast = ipoib_mcast_alloc(dev, 0); 686 if (!mcast) { 687 ipoib_warn(priv, "unable to allocate memory for " 688 "multicast structure\n"); 689 dev_kfree_skb_any(skb); 690 goto out; 691 } 692 693 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); 694 mcast->mcmember.mgid = *mgid; 695 __ipoib_mcast_add(dev, mcast); 696 list_add_tail(&mcast->list, &priv->multicast_list); 697 } 698 699 if (!mcast->ah) { 700 if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) 701 skb_queue_tail(&mcast->pkt_queue, skb); 702 else 703 dev_kfree_skb_any(skb); 704 705 if (mcast->query) 706 ipoib_dbg_mcast(priv, "no address vector, " 707 "but multicast join already started\n"); 708 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) 709 ipoib_mcast_sendonly_join(mcast); 710 711 /* 712 * If lookup completes between here and out:, don't 713 * want to send packet twice. 714 */ 715 mcast = NULL; 716 } 717 718 out: 719 if (mcast && mcast->ah) { 720 if (skb->dst && 721 skb->dst->neighbour && 722 !*to_ipoib_neigh(skb->dst->neighbour)) { 723 struct ipoib_neigh *neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); 724 725 if (neigh) { 726 kref_get(&mcast->ah->ref); 727 neigh->ah = mcast->ah; 728 neigh->neighbour = skb->dst->neighbour; 729 *to_ipoib_neigh(skb->dst->neighbour) = neigh; 730 list_add_tail(&neigh->list, &mcast->neigh_list); 731 } 732 } 733 734 ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); 735 } 736 737 spin_unlock(&priv->lock); 738 } 739 740 void ipoib_mcast_dev_flush(struct net_device *dev) 741 { 742 struct ipoib_dev_priv *priv = netdev_priv(dev); 743 LIST_HEAD(remove_list); 744 struct ipoib_mcast *mcast, *tmcast, *nmcast; 745 unsigned long flags; 746 747 ipoib_dbg_mcast(priv, "flushing multicast list\n"); 748 749 spin_lock_irqsave(&priv->lock, flags); 750 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { 751 nmcast = ipoib_mcast_alloc(dev, 0); 752 if (nmcast) { 753 nmcast->flags = 754 mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY); 755 756 nmcast->mcmember.mgid = mcast->mcmember.mgid; 757 758 /* Add the new group in before the to-be-destroyed group */ 759 list_add_tail(&nmcast->list, &mcast->list); 760 list_del_init(&mcast->list); 761 762 rb_replace_node(&mcast->rb_node, &nmcast->rb_node, 763 &priv->multicast_tree); 764 765 list_add_tail(&mcast->list, &remove_list); 766 } else { 767 ipoib_warn(priv, "could not reallocate multicast group " 768 IPOIB_GID_FMT "\n", 769 IPOIB_GID_ARG(mcast->mcmember.mgid)); 770 } 771 } 772 773 if (priv->broadcast) { 774 nmcast = ipoib_mcast_alloc(dev, 0); 775 if (nmcast) { 776 nmcast->mcmember.mgid = priv->broadcast->mcmember.mgid; 777 778 rb_replace_node(&priv->broadcast->rb_node, 779 &nmcast->rb_node, 780 &priv->multicast_tree); 781 782 list_add_tail(&priv->broadcast->list, &remove_list); 783 } 784 785 priv->broadcast = nmcast; 786 } 787 788 spin_unlock_irqrestore(&priv->lock, flags); 789 790 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { 791 ipoib_mcast_leave(dev, mcast); 792 ipoib_mcast_free(mcast); 793 } 794 } 795 796 void ipoib_mcast_dev_down(struct net_device *dev) 797 { 798 struct ipoib_dev_priv *priv = netdev_priv(dev); 799 unsigned long flags; 800 801 /* Delete broadcast since it will be recreated */ 802 if (priv->broadcast) { 803 ipoib_dbg_mcast(priv, "deleting broadcast group\n"); 804 805 spin_lock_irqsave(&priv->lock, flags); 806 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); 807 spin_unlock_irqrestore(&priv->lock, flags); 808 ipoib_mcast_leave(dev, priv->broadcast); 809 ipoib_mcast_free(priv->broadcast); 810 priv->broadcast = NULL; 811 } 812 } 813 814 void ipoib_mcast_restart_task(void *dev_ptr) 815 { 816 struct net_device *dev = dev_ptr; 817 struct ipoib_dev_priv *priv = netdev_priv(dev); 818 struct dev_mc_list *mclist; 819 struct ipoib_mcast *mcast, *tmcast; 820 LIST_HEAD(remove_list); 821 unsigned long flags; 822 823 ipoib_dbg_mcast(priv, "restarting multicast task\n"); 824 825 ipoib_mcast_stop_thread(dev, 0); 826 827 spin_lock_irqsave(&priv->lock, flags); 828 829 /* 830 * Unfortunately, the networking core only gives us a list of all of 831 * the multicast hardware addresses. We need to figure out which ones 832 * are new and which ones have been removed 833 */ 834 835 /* Clear out the found flag */ 836 list_for_each_entry(mcast, &priv->multicast_list, list) 837 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); 838 839 /* Mark all of the entries that are found or don't exist */ 840 for (mclist = dev->mc_list; mclist; mclist = mclist->next) { 841 union ib_gid mgid; 842 843 memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid); 844 845 /* Add in the P_Key */ 846 mgid.raw[4] = (priv->pkey >> 8) & 0xff; 847 mgid.raw[5] = priv->pkey & 0xff; 848 849 mcast = __ipoib_mcast_find(dev, &mgid); 850 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 851 struct ipoib_mcast *nmcast; 852 853 /* Not found or send-only group, let's add a new entry */ 854 ipoib_dbg_mcast(priv, "adding multicast entry for mgid " 855 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid)); 856 857 nmcast = ipoib_mcast_alloc(dev, 0); 858 if (!nmcast) { 859 ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); 860 continue; 861 } 862 863 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); 864 865 nmcast->mcmember.mgid = mgid; 866 867 if (mcast) { 868 /* Destroy the send only entry */ 869 list_del(&mcast->list); 870 list_add_tail(&mcast->list, &remove_list); 871 872 rb_replace_node(&mcast->rb_node, 873 &nmcast->rb_node, 874 &priv->multicast_tree); 875 } else 876 __ipoib_mcast_add(dev, nmcast); 877 878 list_add_tail(&nmcast->list, &priv->multicast_list); 879 } 880 881 if (mcast) 882 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); 883 } 884 885 /* Remove all of the entries don't exist anymore */ 886 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { 887 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && 888 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 889 ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n", 890 IPOIB_GID_ARG(mcast->mcmember.mgid)); 891 892 rb_erase(&mcast->rb_node, &priv->multicast_tree); 893 894 /* Move to the remove list */ 895 list_del(&mcast->list); 896 list_add_tail(&mcast->list, &remove_list); 897 } 898 } 899 spin_unlock_irqrestore(&priv->lock, flags); 900 901 /* We have to cancel outside of the spinlock */ 902 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { 903 ipoib_mcast_leave(mcast->dev, mcast); 904 ipoib_mcast_free(mcast); 905 } 906 907 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 908 ipoib_mcast_start_thread(dev); 909 } 910 911 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 912 913 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev) 914 { 915 struct ipoib_mcast_iter *iter; 916 917 iter = kmalloc(sizeof *iter, GFP_KERNEL); 918 if (!iter) 919 return NULL; 920 921 iter->dev = dev; 922 memset(iter->mgid.raw, 0, 16); 923 924 if (ipoib_mcast_iter_next(iter)) { 925 kfree(iter); 926 return NULL; 927 } 928 929 return iter; 930 } 931 932 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) 933 { 934 struct ipoib_dev_priv *priv = netdev_priv(iter->dev); 935 struct rb_node *n; 936 struct ipoib_mcast *mcast; 937 int ret = 1; 938 939 spin_lock_irq(&priv->lock); 940 941 n = rb_first(&priv->multicast_tree); 942 943 while (n) { 944 mcast = rb_entry(n, struct ipoib_mcast, rb_node); 945 946 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, 947 sizeof (union ib_gid)) < 0) { 948 iter->mgid = mcast->mcmember.mgid; 949 iter->created = mcast->created; 950 iter->queuelen = skb_queue_len(&mcast->pkt_queue); 951 iter->complete = !!mcast->ah; 952 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); 953 954 ret = 0; 955 956 break; 957 } 958 959 n = rb_next(n); 960 } 961 962 spin_unlock_irq(&priv->lock); 963 964 return ret; 965 } 966 967 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, 968 union ib_gid *mgid, 969 unsigned long *created, 970 unsigned int *queuelen, 971 unsigned int *complete, 972 unsigned int *send_only) 973 { 974 *mgid = iter->mgid; 975 *created = iter->created; 976 *queuelen = iter->queuelen; 977 *complete = iter->complete; 978 *send_only = iter->send_only; 979 } 980 981 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ 982